Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 6426 insertions, 0 deletions

diff --git a/third_party/sipcc/sdp_attr_access.c b/third_party/sipcc/sdp_attr_access.c
new file mode 100644
index 0000000000..b3efa3e6b6
--- /dev/null
+++ b/third_party/sipcc/sdp_attr_access.c
@@ -0,0 +1,6426 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "sdp_os_defs.h"
+#include "sipcc_sdp.h"
+#include "sdp_private.h"
+
+#include "sdp_log.h"
+
+static const char* logTag = "sdp_attr_access";
+
+/* Attribute access routines are all defined by the following parameters.
+ *
+ * sdp_p     The SDP handle returned by sdp_init_description.
+ * level       The level the attribute is defined.  Can be either
+ *             SDP_SESSION_LEVEL or 0-n specifying a media line level.
+ * inst_num    The instance number of the attribute.  Multiple instances
+ *             of a particular attribute may exist at each level and so
+ *             the inst_num determines the particular attribute at that
+ *             level that should be accessed.  Note that this is the
+ *             instance number of the specified type of attribute, not the
+ *             overall attribute number at the level.  Also note that the
+ *             instance number is 1-based.  For example:
+ *             v=0
+ *             o=mhandley 2890844526 2890842807 IN IP4 126.16.64.4
+ *             s=SDP Seminar
+ *             c=IN IP4 10.1.0.2
+ *             t=0 0
+ *             m=audio 1234 RTP/AVP 0 101 102
+ *             a=foo 1
+ *             a=foo 2
+ *             a=bar 1   # This is instance 1 of attribute bar.
+ *             a=foo 3   # This is instance 3 of attribute foo.
+ * cap_num     Almost all of the attributes may be defined as X-cpar
+ *             parameters (with the exception of X-sqn, X-cap, and X-cpar).
+ *             If the cap_num is set to zero, then the attribute is not
+ *             an X-cpar parameter attribute.  If the cap_num is any other
+ *             value, it specifies the capability number that the X-cpar
+ *             attribute is specified for.
+ */
+
+/* Attribute handling:
+ *
+ * There are two basic types of attributes handled by the SDP library,
+ * those defined by a= token lines, and those embedded with a=X-cpar lines.
+ * The handling for each of these is described here.
+ *
+ * Simple (non X-cpar attributes):
+ *
+ * Attributes not embedded in a=X-cpar lines are referenced by level and
+ * instance number.  For these attributes the capability number is always
+ * set to zero.
+ *
+ * An application will typically process these attributes in one of two ways.
+ * With the first method, the application can determine the total number
+ * of attributes defined at a given level and process them one at a time.
+ * For each attribute, the application will query the library to find out
+ * what type of attribute it is and which instance within that type. The
+ * application can then process this particular attribute referencing it
+ * by level and instance number.
+ *
+ * A second method of processing attributes is for applications to determine
+ * each type of attribute they are interested in, query the SDP library to
+ * find out how many of that type of attribute exist at a given level, and
+ * process each one at a time.
+ *
+ * X-cpar attribute processing:
+ *
+ * X-cpar attributes can contain embedded attributes.  They are associated
+ * with X-cap attribute lines.  An example of X-cap and X-cpar attributes
+ * found in an SDP is as follows:
+ *
+ * v=0
+ * o=- 25678 753849 IN IP4 128.96.41.1
+ * s=-
+ * t=0 0
+ * c=IN IP4 10.1.0.2
+ * m=audio 3456 RTP/AVP 18 96
+ * a=rtpmap:96 telephone-event/8000
+ * a=fmtp:96 0-15,32-35
+ * a=X-sqn: 0
+ * a=X-cap: 1 audio RTP/AVP 0 18 96 97
+ * a=X-cpar: a=fmtp:96 0-16,32-35
+ * a=X-cpar: a=rtpmap:97 X-NSE/8000
+ * a=X-cpar: a=fmtp:97 195-197
+ * a=X-cap: 5 image udptl t38
+ * a=X-cap: 6 application udp X-tmr
+ * a=X-cap: 7 audio RTP/AVP 100 101
+ * a=X-cpar: a=rtpmap:100 g.711/8000
+ * a=X-cpar: a=rtpmap:101 g.729/8000
+ *
+ * X-cap attributes can be defined at the SESSION_LEVEL or any media level.
+ * An X-cap attr is defined by the level and instance number just like
+ * other attributes.  In the example above, X-cap attrs are defined at
+ * media level 1 and there are four instances at that level.
+ *
+ * The X-cpar attributes can also be referenced by level and instance number.
+ * However, the embedded attribute within an X-cpar attribute must be
+ * referenced by level, instance number, and capability number.  This is
+ * because the X-cpar attribute is associated with a particular X-cap/
+ * capability.
+ * For all attributes that are not embedded within an X-cpar attribute, the
+ * cap_num should be referenced as zero.  But for X-cpar attributes, the
+ * cap_num is specified to be one of the capability numbers of the previous
+ * X-cap line.  The number of capabilities specified in an X-cap line is
+ * equal to the number of payloads.  Thus, in this example, the first X-cap
+ * attr instance specifies capabilities 1-4, the second specifies capability
+ * 5, the third capability 6, and the fourth capabilities 7-8.
+ *
+ * X-cpar attributes can be processed with methods similar to the two
+ * previously mentioned.  For each X-cap attribute, the application can
+ * use one of two methods to process the X-cpar attributes.  First, it
+ * can query the total number of X-cpar attributes associated with a
+ * given X-cap attribute.  The X-cap attribute is here defined by a level
+ * and a capability number.  In the example above, the total number of
+ * attributes defined is as follows:
+ *  level 1, cap_num 1 - total attrs: 3
+ *  level 1, cap_num 5 - total attrs: 0
+ *  level 1, cap_num 6 - total attrs: 0
+ *  level 1, cap_num 7 - total attrs: 2
+ *
+ * Note that if the application queried the number of attributes for
+ * cap_num 2, 3, or 4, it would also return 3 attrs, and for cap_num
+ * 8 the library would return 2.
+ *
+ * Once the application determines the total number of attributes for
+ * that capability, it can again query the embedded attribute type and
+ * instance.  For example, sdp_get_attr_type would return the following:
+ *  level 1, cap_num 1, attr 1 -> attr type fmtp, instance 1
+ *  level 1, cap_num 1, attr 2 -> attr type rtpmap, instance 1
+ *  level 1, cap_num 1, attr 3 -> attr type fmtp, instance 2
+ *  level 1, cap_num 7, attr 1 -> attr type rtpmap, instance 1
+ *  level 1, cap_num 7, attr 2 -> attr type rtpmap, instance 2
+ *
+ * The individual embedded attributes can then be accessed by level,
+ * cap_num, and instance number.
+ *
+ * With the second method for handling X-cpar attributes, the application
+ * determines the types of attributes it is interested in.  It can then
+ * query the SDP library to determine the number of attributes of that
+ * type found for that level and cap_num, and then process each one at
+ * a time.  e.g., calling sdp_attr_num_instances would give:
+ *  level 1, cap_num 1, attr_type fmtp -> two instances
+ *  level 1, cap_num 1, attr_type rtpmap -> one instance
+ *  level 1, cap_num 7, attr_type fmtp -> zero instances
+ *  level 1, cap_num 7, attr_type rtpmap -> two instances
+ */
+
+
+/* Function:    sdp_add_new_attr
+ * Description: Add a new attribute of the specified type at the given
+ *              level and capability level or base attribute if cap_num
+ *              is zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              attr_type   The type of attribute to add.
+ *              inst_num    Pointer to a uint16_t in which to return the instance
+ *                          number of the newly added attribute.
+ * Returns:     SDP_SUCCESS            Attribute was added successfully.
+ *              SDP_NO_RESOURCE        No memory avail for new attribute.
+ *              SDP_INVALID_PARAMETER  Specified media line is not defined.
+ */
+sdp_result_e sdp_add_new_attr (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                               sdp_attr_e attr_type, uint16_t *inst_num)
+{
+    uint16_t          i;
+    sdp_mca_t   *mca_p;
+    sdp_mca_t   *cap_p;
+    sdp_attr_t  *attr_p;
+    sdp_attr_t  *new_attr_p;
+    sdp_attr_t  *prev_attr_p=NULL;
+    sdp_fmtp_t  *fmtp_p;
+    sdp_comediadir_t  *comediadir_p;
+
+    *inst_num = 0;
+
+    if ((cap_num != 0) &&
+        ((attr_type == SDP_ATTR_X_CAP) || (attr_type == SDP_ATTR_X_CPAR) ||
+         (attr_type == SDP_ATTR_X_SQN) || (attr_type == SDP_ATTR_CDSC) ||
+         (attr_type == SDP_ATTR_CPAR) || (attr_type == SDP_ATTR_SQN))) {
+        if (sdp_p->debug_flag[SDP_DEBUG_WARNINGS]) {
+            SDPLogDebug(logTag, "%s Warning: Invalid attribute type for X-cpar/cdsc "
+                     "parameter.", sdp_p->debug_str);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    /* Some attributes are valid only under media level */
+    if (level == SDP_SESSION_LEVEL) {
+        switch (attr_type) {
+            case SDP_ATTR_RTCP:
+            case SDP_ATTR_LABEL:
+                return (SDP_INVALID_MEDIA_LEVEL);
+
+            default:
+                break;
+        }
+    }
+
+    new_attr_p = (sdp_attr_t *)SDP_MALLOC(sizeof(sdp_attr_t));
+    if (new_attr_p == NULL) {
+        sdp_p->conf_p->num_no_resource++;
+        return (SDP_NO_RESOURCE);
+    }
+
+    new_attr_p->type = attr_type;
+    new_attr_p->next_p = NULL;
+
+    /* Initialize the new attribute structure */
+    if ((new_attr_p->type == SDP_ATTR_X_CAP) ||
+        (new_attr_p->type == SDP_ATTR_CDSC)) {
+        new_attr_p->attr.cap_p = (sdp_mca_t *)SDP_MALLOC(sizeof(sdp_mca_t));
+        if (new_attr_p->attr.cap_p == NULL) {
+            sdp_free_attr(new_attr_p);
+            sdp_p->conf_p->num_no_resource++;
+            return (SDP_NO_RESOURCE);
+        }
+    } else if (new_attr_p->type == SDP_ATTR_FMTP) {
+        fmtp_p = &(new_attr_p->attr.fmtp);
+        fmtp_p->fmtp_format = SDP_FMTP_UNKNOWN_TYPE;
+        // set to invalid value
+        fmtp_p->packetization_mode = SDP_INVALID_PACKETIZATION_MODE_VALUE;
+        fmtp_p->level_asymmetry_allowed = SDP_INVALID_LEVEL_ASYMMETRY_ALLOWED_VALUE;
+        fmtp_p->annexb_required = FALSE;
+        fmtp_p->annexa_required = FALSE;
+        fmtp_p->maxval = 0;
+        fmtp_p->bitrate = 0;
+        fmtp_p->cif = 0;
+        fmtp_p->qcif = 0;
+        fmtp_p->profile = SDP_INVALID_VALUE;
+        fmtp_p->level = SDP_INVALID_VALUE;
+        fmtp_p->parameter_add = SDP_FMTP_UNUSED;
+        fmtp_p->usedtx = SDP_FMTP_UNUSED;
+        fmtp_p->stereo = SDP_FMTP_UNUSED;
+        fmtp_p->useinbandfec = SDP_FMTP_UNUSED;
+        fmtp_p->cbr = SDP_FMTP_UNUSED;
+        for (i=0; i < SDP_NE_NUM_BMAP_WORDS; i++) {
+            fmtp_p->bmap[i] = 0;
+        }
+    } else if ((new_attr_p->type == SDP_ATTR_RTPMAP) ||
+               (new_attr_p->type == SDP_ATTR_SPRTMAP)) {
+        new_attr_p->attr.transport_map.num_chan = 1;
+    } else if (new_attr_p->type == SDP_ATTR_DIRECTION) {
+        comediadir_p = &(new_attr_p->attr.comediadir);
+        comediadir_p->role = SDP_MEDIADIR_ROLE_PASSIVE;
+        comediadir_p->conn_info_present = FALSE;
+    } else if (new_attr_p->type == SDP_ATTR_MPTIME) {
+        sdp_mptime_t *mptime = &(new_attr_p->attr.mptime);
+        mptime->num_intervals = 0;
+    }
+
+    if (cap_num == 0) {
+        /* Add a new attribute. */
+        if (level == SDP_SESSION_LEVEL) {
+            if (sdp_p->sess_attrs_p == NULL) {
+                sdp_p->sess_attrs_p = new_attr_p;
+            } else {
+                for (attr_p = sdp_p->sess_attrs_p;
+                     attr_p != NULL;
+                     prev_attr_p = attr_p, attr_p = attr_p->next_p) {
+                    /* Count the num instances of this type. */
+                    if (attr_p->type == attr_type) {
+                        (*inst_num)++;
+                    }
+                }
+                prev_attr_p->next_p = new_attr_p;
+            }
+        } else {
+            mca_p = sdp_find_media_level(sdp_p, level);
+            if (mca_p == NULL) {
+                sdp_free_attr(new_attr_p);
+                sdp_p->conf_p->num_invalid_param++;
+                return (SDP_INVALID_PARAMETER);
+            }
+            if (mca_p->media_attrs_p == NULL) {
+                mca_p->media_attrs_p = new_attr_p;
+            } else {
+                for (attr_p = mca_p->media_attrs_p;
+                     attr_p != NULL;
+                     prev_attr_p = attr_p, attr_p = attr_p->next_p) {
+                    /* Count the num instances of this type. */
+                    if (attr_p->type == attr_type) {
+                        (*inst_num)++;
+                    }
+                }
+                prev_attr_p->next_p = new_attr_p;
+            }
+        }
+    } else {
+        /* Add a new capability attribute - find the capability attr. */
+        attr_p = sdp_find_capability(sdp_p, level, cap_num);
+        if (attr_p == NULL) {
+            sdp_free_attr(new_attr_p);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        }
+        cap_p = attr_p->attr.cap_p;
+        if (cap_p->media_attrs_p == NULL) {
+            cap_p->media_attrs_p = new_attr_p;
+        } else {
+            for (attr_p = cap_p->media_attrs_p;
+                 attr_p != NULL;
+                 prev_attr_p = attr_p, attr_p = attr_p->next_p) {
+                /* Count the num instances of this type. */
+                if (attr_p->type == attr_type) {
+                    (*inst_num)++;
+                }
+            }
+            prev_attr_p->next_p = new_attr_p;
+        }
+    }
+
+    /* Increment the instance num for the attr just added. */
+    (*inst_num)++;
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_num_instances
+ * Description: Get the number of attributes of the specified type at
+ *              the given level and capability level.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              attr_type   The type of attribute to add.
+ *              num_attr_inst Pointer to a uint16_t in which to return the
+ *                          number of attributes.
+ * Returns:     SDP_SUCCESS            Attribute was added successfully.
+ *              SDP_INVALID_PARAMETER  Specified media line is not defined.
+ */
+sdp_result_e sdp_attr_num_instances (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                     sdp_attr_e attr_type, uint16_t *num_attr_inst)
+{
+    sdp_attr_t  *attr_p;
+    sdp_result_e rc;
+    static char  fname[] = "attr_num_instances";
+
+    *num_attr_inst = 0;
+
+    rc = sdp_find_attr_list(sdp_p, level, cap_num, &attr_p, fname);
+    if (rc == SDP_SUCCESS) {
+        /* Found the attr list. Count the number of attrs of the given
+         * type at this level. */
+        for (; attr_p != NULL; attr_p = attr_p->next_p) {
+            if (attr_p->type == attr_type) {
+                (*num_attr_inst)++;
+            }
+        }
+
+    }
+
+    return (rc);
+}
+
+/* Forward declaration for use in sdp_free_attr */
+static boolean sdp_attr_is_long_string(sdp_attr_e attr_type);
+
+
+/* Internal routine to free the memory associated with an attribute.
+ * Certain attributes allocate additional memory.  Free this and then
+ * free the attribute itself.
+ * Note that this routine may be called at any point (i.e., may be
+ * called due to a failure case) and so the additional memory
+ * associated with an attribute may or may not have been already
+ * allocated. This routine should check this carefully.
+ */
+void sdp_free_attr (sdp_attr_t *attr_p)
+{
+    sdp_mca_t   *cap_p;
+    sdp_attr_t  *cpar_p;
+    sdp_attr_t  *next_cpar_p;
+    int          i;
+
+    /* If this is an X-cap/cdsc attr, free the cap_p structure and
+     * all X-cpar/cpar attributes. */
+    if ((attr_p->type == SDP_ATTR_X_CAP) ||
+        (attr_p->type == SDP_ATTR_CDSC)) {
+        cap_p = attr_p->attr.cap_p;
+        if (cap_p != NULL) {
+            for (cpar_p = cap_p->media_attrs_p; cpar_p != NULL;) {
+                next_cpar_p = cpar_p->next_p;
+                sdp_free_attr(cpar_p);
+                cpar_p = next_cpar_p;
+            }
+            SDP_FREE(cap_p);
+        }
+    } else if ((attr_p->type == SDP_ATTR_SDESCRIPTIONS) ||
+              (attr_p->type == SDP_ATTR_SRTP_CONTEXT)) {
+        SDP_FREE(attr_p->attr.srtp_context.session_parameters);
+    } else if (sdp_attr_is_long_string(attr_p->type)) {
+        SDP_FREE(attr_p->attr.stringp);
+    }
+
+    if (attr_p->type == SDP_ATTR_GROUP) {
+        for (i = 0; i < attr_p->attr.stream_data.num_group_id; i++) {
+            SDP_FREE(attr_p->attr.stream_data.group_ids[i]);
+        }
+    } else if (attr_p->type == SDP_ATTR_MSID_SEMANTIC) {
+        for (i = 0; i < SDP_MAX_MEDIA_STREAMS; ++i) {
+            SDP_FREE(attr_p->attr.msid_semantic.msids[i]);
+        }
+    }
+
+    /* Now free the actual attribute memory. */
+    SDP_FREE(attr_p);
+
+}
+
+
+/* Function:    sdp_find_attr_list
+ * Description: Find the attribute list for the specified level and cap_num.
+ *              Note: This is not an API for the application but an internal
+ *              routine used by the SDP library.
+ * Parameters:  sdp_p       Pointer to the SDP to search.
+ *              level       The level to check for the attribute list.
+ *              cap_num     The capability number associated with the
+ *                          attribute list.  If none, should be zero.
+ *              attr_p      Pointer to the attr list pointer. Will be
+ *                          filled in on return if successful.
+ *              fname       String function name calling this routine.
+ *                          Use for printing debug.
+ * Returns:     SDP_SUCCESS
+ *              SDP_INVALID_MEDIA_LEVEL
+ *              SDP_INVALID_CAPABILITY
+ *              SDP_FAILURE
+ */
+sdp_result_e sdp_find_attr_list (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                 sdp_attr_t **attr_p, char *fname)
+{
+    sdp_mca_t   *mca_p;
+    sdp_mca_t   *cap_p;
+    sdp_attr_t  *cap_attr_p;
+
+    /* Initialize the attr pointer. */
+    *attr_p = NULL;
+
+    if (cap_num == 0) {
+        /* Find attribute list at the specified level. */
+        if (level == SDP_SESSION_LEVEL) {
+            *attr_p = sdp_p->sess_attrs_p;
+        } else {
+            mca_p = sdp_find_media_level(sdp_p, level);
+            if (mca_p == NULL) {
+                sdp_p->conf_p->num_invalid_param++;
+                return (SDP_INVALID_PARAMETER);
+            }
+            *attr_p = mca_p->media_attrs_p;
+        }
+    } else {
+        /* Find the attr list for the capability specified. */
+        cap_attr_p = sdp_find_capability(sdp_p, level, cap_num);
+        if (cap_attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s %s, invalid capability %u at "
+                          "level %u specified.", sdp_p->debug_str, fname,
+                          (unsigned)cap_num, (unsigned)level);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_CAPABILITY);
+        }
+        cap_p = cap_attr_p->attr.cap_p;
+        *attr_p = cap_p->media_attrs_p;
+    }
+
+    return (SDP_SUCCESS);
+}
+
+/* Find fmtp inst_num with correct payload value or -1 for failure */
+int sdp_find_fmtp_inst (sdp_t *sdp_p, uint16_t level, uint16_t payload_num)
+{
+    uint16_t          attr_count=0;
+    sdp_mca_t   *mca_p;
+    sdp_attr_t  *attr_p;
+
+    /* Attr is at a media level */
+    mca_p = sdp_find_media_level(sdp_p, level);
+    if (mca_p == NULL) {
+      return (-1);
+    }
+    for (attr_p = mca_p->media_attrs_p; attr_p != NULL;
+         attr_p = attr_p->next_p) {
+      if (attr_p->type == SDP_ATTR_FMTP) {
+        attr_count++;
+        if (attr_p->attr.fmtp.payload_num == payload_num) {
+          return (attr_count);
+        }
+      }
+    }
+
+    return (-1);
+
+}
+
+/* Function:    sdp_find_attr
+ * Description: Find the specified attribute in an SDP structure.
+ *              Note: This is not an API for the application but an internal
+ *              routine used by the SDP library.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              attr_type   The type of attribute to find.
+ *              inst_num    The instance num of the attribute to find.
+ *                          Range should be (1 - max num insts of this
+ *                          particular type of attribute at this level).
+ * Returns:     Pointer to the attribute or NULL if not found.
+ */
+sdp_attr_t *sdp_find_attr (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                           sdp_attr_e attr_type, uint16_t inst_num)
+{
+    uint16_t          attr_count=0;
+    sdp_mca_t   *mca_p;
+    sdp_mca_t   *cap_p;
+    sdp_attr_t  *attr_p;
+
+    if (inst_num < 1) {
+        return (NULL);
+    }
+
+    if (cap_num == 0) {
+        if (level == SDP_SESSION_LEVEL) {
+            for (attr_p = sdp_p->sess_attrs_p; attr_p != NULL;
+                 attr_p = attr_p->next_p) {
+                if (attr_p->type == attr_type) {
+                    attr_count++;
+                    if (attr_count == inst_num) {
+                        return (attr_p);
+                    }
+                }
+            }
+        } else {  /* Attr is at a media level */
+            mca_p = sdp_find_media_level(sdp_p, level);
+            if (mca_p == NULL) {
+                return (NULL);
+            }
+            for (attr_p = mca_p->media_attrs_p; attr_p != NULL;
+                 attr_p = attr_p->next_p) {
+                if (attr_p->type == attr_type) {
+                    attr_count++;
+                    if (attr_count == inst_num) {
+                        return (attr_p);
+                    }
+                }
+            }
+        }  /* Attr is at a media level */
+    } else {
+        /* Attr is a capability X-cpar/cpar attribute. */
+        attr_p = sdp_find_capability(sdp_p, level, cap_num);
+        if (attr_p == NULL) {
+            return (NULL);
+        }
+        cap_p = attr_p->attr.cap_p;
+        /* Now find the specific attribute. */
+        for (attr_p = cap_p->media_attrs_p; attr_p != NULL;
+             attr_p = attr_p->next_p) {
+            if (attr_p->type == attr_type) {
+                attr_count++;
+                if (attr_count == inst_num) {
+                    return (attr_p);
+                }
+            }
+        }
+    }
+
+    return (NULL);
+}
+
+/* Function:    sdp_find_capability
+ * Description: Find the specified capability attribute in an SDP structure.
+ *              Note: This is not an API for the application but an internal
+ *              routine used by the SDP library.
+ * Parameters:  sdp_p       The SDP handle.
+ *              level       The level to check for the capability.
+ *              cap_num     The capability number to locate.
+ * Returns:     Pointer to the capability attribute or NULL if not found.
+ */
+sdp_attr_t *sdp_find_capability (sdp_t *sdp_p, uint16_t level, uint8_t cap_num)
+{
+    uint8_t           cur_cap_num=0;
+    sdp_mca_t   *mca_p;
+    sdp_mca_t   *cap_p;
+    sdp_attr_t  *attr_p;
+
+    if (level == SDP_SESSION_LEVEL) {
+        for (attr_p = sdp_p->sess_attrs_p; attr_p != NULL;
+             attr_p = attr_p->next_p) {
+            if ((attr_p->type == SDP_ATTR_X_CAP) ||
+                (attr_p->type == SDP_ATTR_CDSC)) {
+                cap_p = attr_p->attr.cap_p;
+                cur_cap_num += cap_p->num_payloads;
+                if (cap_num <= cur_cap_num) {
+                    /* This is the right capability */
+                    return (attr_p);
+                }
+            }
+        }
+    } else {  /* Capability is at a media level */
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            return (NULL);
+        }
+        for (attr_p = mca_p->media_attrs_p; attr_p != NULL;
+             attr_p = attr_p->next_p) {
+            if ((attr_p->type == SDP_ATTR_X_CAP) ||
+                (attr_p->type == SDP_ATTR_CDSC)) {
+                cap_p = attr_p->attr.cap_p;
+                cur_cap_num += cap_p->num_payloads;
+                if (cap_num <= cur_cap_num) {
+                    /* This is the right capability */
+                    return (attr_p);
+                }
+            }
+        }
+    }
+
+    /* We didn't find the specified capability. */
+    if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+        SDPLogError(logTag, "%s Unable to find specified capability (level %u, "
+                  "cap_num %u).", sdp_p->debug_str, (unsigned)level, (unsigned)cap_num);
+    }
+    sdp_p->conf_p->num_invalid_param++;
+    return (NULL);
+}
+
+/* Function:    sdp_attr_valid(sdp_t *sdp_p)
+ * Description: Returns true or false depending on whether the specified
+ *              instance of the given attribute has been defined at the
+ *              given level.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              attr_type   The attribute type to validate.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     TRUE or FALSE.
+ */
+tinybool sdp_attr_valid (sdp_t *sdp_p, sdp_attr_e attr_type, uint16_t level,
+                         uint8_t cap_num, uint16_t inst_num)
+{
+    if (sdp_find_attr(sdp_p, level, cap_num, attr_type, inst_num) == NULL) {
+        return (FALSE);
+    } else {
+        return (TRUE);
+    }
+}
+
+/* Function:    sdp_attr_line_number(sdp_t *sdp_p)
+ * Description: Returns the line number this attribute appears on.
+ *              Only works if the SDP was parsed rather than created
+ *              locally.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              attr_type   The attribute type to validate.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     line number, or 0 if an error
+ */
+uint32_t sdp_attr_line_number (sdp_t *sdp_p, sdp_attr_e attr_type, uint16_t level,
+                          uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, attr_type, inst_num);
+    if (attr_p == NULL) {
+        return 0;
+    } else {
+        return attr_p->line_number;
+    }
+}
+
+static boolean sdp_attr_is_simple_string(sdp_attr_e attr_type) {
+    if ((attr_type != SDP_ATTR_BEARER) &&
+        (attr_type != SDP_ATTR_CALLED) &&
+        (attr_type != SDP_ATTR_CONN_TYPE) &&
+        (attr_type != SDP_ATTR_DIALED) &&
+        (attr_type != SDP_ATTR_DIALING) &&
+        (attr_type != SDP_ATTR_FRAMING) &&
+        (attr_type != SDP_ATTR_MID) &&
+        (attr_type != SDP_ATTR_X_SIDIN) &&
+        (attr_type != SDP_ATTR_X_SIDOUT)&&
+        (attr_type != SDP_ATTR_X_CONFID) &&
+        (attr_type != SDP_ATTR_LABEL) &&
+        (attr_type != SDP_ATTR_ICE_OPTIONS) &&
+        (attr_type != SDP_ATTR_IMAGEATTR) &&
+        (attr_type != SDP_ATTR_SIMULCAST) &&
+        (attr_type != SDP_ATTR_RID)) {
+      return FALSE;
+    }
+    return TRUE;
+}
+
+/* Function:    sdp_attr_get_simple_string
+ * Description: Returns a pointer to a string attribute parameter.  This
+ *              routine can only be called for attributes that have just
+ *              one string parameter.  The value is returned as a const
+ *              ptr and so cannot be modified by the application.  If the
+ *              given attribute is not defined, NULL will be returned.
+ *              Attributes with a simple string parameter currently include:
+ *              bearer, called, connection_type, dialed, dialing, direction
+ *              and framing.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              attr_type   The simple string attribute type.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Pointer to the parameter value.
+ */
+const char *sdp_attr_get_simple_string (sdp_t *sdp_p, sdp_attr_e attr_type,
+                                        uint16_t level, uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    if (!sdp_attr_is_simple_string(attr_type)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute type is not a simple string (%s)",
+                      sdp_p->debug_str, sdp_get_attr_name(attr_type));
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    }
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, attr_type, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute %s, level %u instance %u not found.",
+                      sdp_p->debug_str, sdp_get_attr_name(attr_type),
+                      (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        return (attr_p->attr.string_val);
+    }
+}
+
+static boolean sdp_attr_is_long_string(sdp_attr_e attr_type) {
+  return (attr_type == SDP_ATTR_IDENTITY || attr_type == SDP_ATTR_DTLS_MESSAGE);
+}
+
+/* Identical in usage to sdp_attr_get_simple_string() */
+const char *sdp_attr_get_long_string (sdp_t *sdp_p, sdp_attr_e attr_type,
+                                      uint16_t level, uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    if (!sdp_attr_is_long_string(attr_type)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute type is not a long string (%s)",
+                      sdp_p->debug_str, sdp_get_attr_name(attr_type));
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    }
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, attr_type, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute %s, level %u instance %u not found.",
+                      sdp_p->debug_str, sdp_get_attr_name(attr_type),
+                      (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        return (attr_p->attr.stringp);
+    }
+}
+
+static boolean sdp_attr_is_simple_u32(sdp_attr_e attr_type) {
+    if ((attr_type != SDP_ATTR_EECID) &&
+        (attr_type != SDP_ATTR_PTIME) &&
+        (attr_type != SDP_ATTR_MAXPTIME) &&
+        (attr_type != SDP_ATTR_SCTPPORT) &&
+        (attr_type != SDP_ATTR_MAXMESSAGESIZE) &&
+        (attr_type != SDP_ATTR_T38_VERSION) &&
+        (attr_type != SDP_ATTR_T38_MAXBITRATE) &&
+        (attr_type != SDP_ATTR_T38_MAXBUFFER) &&
+        (attr_type != SDP_ATTR_T38_MAXDGRAM) &&
+        (attr_type != SDP_ATTR_X_SQN) &&
+        (attr_type != SDP_ATTR_TC1_PAYLOAD_BYTES) &&
+        (attr_type != SDP_ATTR_TC1_WINDOW_SIZE) &&
+        (attr_type != SDP_ATTR_TC2_PAYLOAD_BYTES) &&
+        (attr_type != SDP_ATTR_TC2_WINDOW_SIZE) &&
+        (attr_type != SDP_ATTR_FRAMERATE)) {
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+/* Function:    sdp_attr_get_simple_u32
+ * Description: Returns an unsigned 32-bit attribute parameter.  This
+ *              routine can only be called for attributes that have just
+ *              one uint32_t parameter.  If the given attribute is not defined,
+ *              zero will be returned.  There is no way for the application
+ *              to determine if zero is the actual value or the attribute
+ *              wasn't defined, so the application must use the
+ *              sdp_attr_valid function to determine this.
+ *              Attributes with a simple uint32_t parameter currently include:
+ *              eecid, ptime, T38FaxVersion, T38maxBitRate, T38FaxMaxBuffer,
+ *              T38FaxMaxDatagram, X-sqn, TC1PayloadBytes, TC1WindowSize,
+ *              TC2PayloadBytes, TC2WindowSize, rtcp.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              attr_type   The simple uint32_t attribute type.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     uint32_t parameter value.
+ */
+uint32_t sdp_attr_get_simple_u32 (sdp_t *sdp_p, sdp_attr_e attr_type, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    if (!sdp_attr_is_simple_u32(attr_type)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute type is not a simple uint32_t (%s)",
+                      sdp_p->debug_str, sdp_get_attr_name(attr_type));
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    }
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, attr_type, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute %s, level %u instance %u not found.",
+                      sdp_p->debug_str, sdp_get_attr_name(attr_type),
+                      (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.u32_val);
+    }
+}
+
+/* Function:    sdp_attr_get_simple_boolean
+ * Description: Returns a boolean attribute parameter.  This
+ *              routine can only be called for attributes that have just
+ *              one boolean parameter.  If the given attribute is not defined,
+ *              FALSE will be returned.  There is no way for the application
+ *              to determine if FALSE is the actual value or the attribute
+ *              wasn't defined, so the application must use the
+ *              sdp_attr_valid function to determine this.
+ *              Attributes with a simple boolean parameter currently include:
+ *              T38FaxFillBitRemoval, T38FaxTranscodingMMR,
+ *              T38FaxTranscodingJBIG, and TMRGwXid.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              attr_type   The simple boolean attribute type.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Boolean value.
+ */
+tinybool sdp_attr_get_simple_boolean (sdp_t *sdp_p, sdp_attr_e attr_type,
+                                      uint16_t level, uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    if ((attr_type != SDP_ATTR_T38_FILLBITREMOVAL) &&
+        (attr_type != SDP_ATTR_T38_TRANSCODINGMMR) &&
+        (attr_type != SDP_ATTR_T38_TRANSCODINGJBIG) &&
+        (attr_type != SDP_ATTR_TMRGWXID)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute type is not a simple boolean (%s)",
+                      sdp_p->debug_str, sdp_get_attr_name(attr_type));
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    }
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, attr_type, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute %s, level %u instance %u not found.",
+                      sdp_p->debug_str, sdp_get_attr_name(attr_type),
+                      (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.boolean_val);
+    }
+}
+
+/*
+ * sdp_attr_get_maxprate
+ *
+ * This function is used by the application layer to get the packet-rate
+ * within the maxprate attribute.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to set.
+ *
+ * Returns a pointer to a constant char array that stores the packet-rate,
+ * OR null if the attribute does not exist.
+ */
+const char*
+sdp_attr_get_maxprate (sdp_t *sdp_p, uint16_t level, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_MAXPRATE, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Attribute %s, level %u instance %u not found.",
+                      sdp_p->debug_str, sdp_get_attr_name(SDP_ATTR_MAXPRATE),
+                      (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        return (attr_p->attr.string_val);
+    }
+}
+
+/* Function:    sdp_attr_get_t38ratemgmt
+ * Description: Returns the value of the t38ratemgmt attribute
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_T38_UNKNOWN_RATE is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Ratemgmt value.
+ */
+sdp_t38_ratemgmt_e sdp_attr_get_t38ratemgmt (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_T38_RATEMGMT, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s t38ratemgmt attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_T38_UNKNOWN_RATE);
+    } else {
+        return (attr_p->attr.t38ratemgmt);
+    }
+}
+
+/* Function:    sdp_attr_get_t38udpec
+ * Description: Returns the value of the t38udpec attribute
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_T38_UDPEC_UNKNOWN is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     UDP EC value.
+ */
+sdp_t38_udpec_e sdp_attr_get_t38udpec (sdp_t *sdp_p, uint16_t level,
+                                       uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_T38_UDPEC, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s t38udpec attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_T38_UDPEC_UNKNOWN);
+    } else {
+        return (attr_p->attr.t38udpec);
+    }
+}
+
+/* Function:    sdp_get_media_direction
+ * Description: Determines the direction defined for a given level.  The
+ *              direction will be inactive, sendonly, recvonly, or sendrecv
+ *              as determined by the last of these attributes specified at
+ *              the given level.  If none of these attributes are specified,
+ *              the direction will be sendrecv by default.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ * Returns:     An SDP direction enum value.
+ */
+sdp_direction_e sdp_get_media_direction (sdp_t *sdp_p, uint16_t level,
+                                         uint8_t cap_num)
+{
+    sdp_mca_t   *mca_p;
+    sdp_attr_t  *attr_p;
+    sdp_direction_e direction = SDP_DIRECTION_SENDRECV;
+
+    if (cap_num == 0) {
+        /* Find the pointer to the attr list for this level. */
+        if (level == SDP_SESSION_LEVEL) {
+            attr_p = sdp_p->sess_attrs_p;
+        } else {  /* Attr is at a media level */
+            mca_p = sdp_find_media_level(sdp_p, level);
+            if (mca_p == NULL) {
+                return (direction);
+            }
+            attr_p = mca_p->media_attrs_p;
+        }
+
+        /* Scan for direction oriented attributes.  Last one wins. */
+        for (; attr_p != NULL; attr_p = attr_p->next_p) {
+            if (attr_p->type == SDP_ATTR_INACTIVE) {
+                direction = SDP_DIRECTION_INACTIVE;
+            } else if (attr_p->type == SDP_ATTR_SENDONLY) {
+                direction = SDP_DIRECTION_SENDONLY;
+            } else if (attr_p->type == SDP_ATTR_RECVONLY) {
+                direction = SDP_DIRECTION_RECVONLY;
+            } else if (attr_p->type == SDP_ATTR_SENDRECV) {
+                direction = SDP_DIRECTION_SENDRECV;
+            }
+        }
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_WARNINGS]) {
+            SDPLogDebug(logTag, "%s Warning: Invalid cap_num for media direction.",
+                     sdp_p->debug_str);
+        }
+    }
+
+    return (direction);
+}
+
+/* Since there are four different attribute names which all have the same
+ * qos parameters, all of these attributes are accessed through this same
+ * set of APIs.  To distinguish between specific attributes, the application
+ * must also pass the attribute type.  The attribute must be one of:
+ * SDP_ATTR_QOS, SDP_ATTR_SECURE, SDP_ATTR_X_PC_QOS, and SDP_ATTR_X_QOS.
+ */
+tinybool sdp_validate_qos_attr (sdp_attr_e qos_attr)
+{
+    if ((qos_attr == SDP_ATTR_QOS) ||
+        (qos_attr == SDP_ATTR_SECURE) ||
+        (qos_attr == SDP_ATTR_X_PC_QOS) ||
+        (qos_attr == SDP_ATTR_X_QOS) ||
+        (qos_attr == SDP_ATTR_CURR) ||
+        (qos_attr == SDP_ATTR_DES) ||
+        (qos_attr == SDP_ATTR_CONF)){
+        return (TRUE);
+    } else {
+        return (FALSE);
+    }
+}
+
+/* Function:    sdp_attr_get_qos_strength
+ * Description: Returns the value of the qos attribute strength
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_QOS_STRENGTH_UNKNOWN is
+ *              returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              qos_attr    The specific type of qos attribute.  May be
+ *                          qos, secure, X-pc-qos, or X-qos.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Qos strength value.
+ */
+sdp_qos_strength_e sdp_attr_get_qos_strength (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    if (sdp_validate_qos_attr(qos_attr) == FALSE) {
+        if (sdp_p->debug_flag[SDP_DEBUG_WARNINGS]) {
+            SDPLogDebug(logTag, "%s Warning: Invalid QOS attribute specified for"
+                     "get qos strength.", sdp_p->debug_str);
+        }
+        return (SDP_QOS_STRENGTH_UNKNOWN);
+    }
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, qos_attr, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s %s attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str,
+                      sdp_get_attr_name(qos_attr), (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_QOS_STRENGTH_UNKNOWN);
+    } else {
+        switch (qos_attr) {
+            case SDP_ATTR_QOS:
+                return (attr_p->attr.qos.strength);
+            case SDP_ATTR_DES:
+                return (attr_p->attr.des.strength);
+            default:
+                return SDP_QOS_STRENGTH_UNKNOWN;
+
+        }
+    }
+}
+
+/* Function:    sdp_attr_get_qos_direction
+ * Description: Returns the value of the qos attribute direction
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_QOS_DIR_UNKNOWN is
+ *              returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              qos_attr    The specific type of qos attribute.  May be
+ *                          qos, secure, X-pc-qos, or X-qos.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Qos direction value.
+ */
+sdp_qos_dir_e sdp_attr_get_qos_direction (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    if (sdp_validate_qos_attr(qos_attr) == FALSE) {
+        if (sdp_p->debug_flag[SDP_DEBUG_WARNINGS]) {
+            SDPLogDebug(logTag, "%s Warning: Invalid QOS attribute specified "
+                     "for get qos direction.", sdp_p->debug_str);
+        }
+        return (SDP_QOS_DIR_UNKNOWN);
+    }
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, qos_attr, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s %s attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str,
+                      sdp_get_attr_name(qos_attr), (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_QOS_DIR_UNKNOWN);
+    } else {
+         switch (qos_attr) {
+            case SDP_ATTR_QOS:
+                 return (attr_p->attr.qos.direction);
+            case SDP_ATTR_CURR:
+                 return (attr_p->attr.curr.direction);
+            case SDP_ATTR_DES:
+                 return (attr_p->attr.des.direction);
+            case SDP_ATTR_CONF:
+                 return (attr_p->attr.conf.direction);
+            default:
+                return SDP_QOS_DIR_UNKNOWN;
+
+        }
+    }
+}
+
+/* Function:    sdp_attr_get_qos_status_type
+ * Description: Returns the value of the qos attribute status_type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_QOS_STATUS_TYPE_UNKNOWN is
+ *              returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              qos_attr    The specific type of qos attribute.  May be
+ *                          qos, secure, X-pc-qos, or X-qos.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Qos direction value.
+ */
+sdp_qos_status_types_e sdp_attr_get_qos_status_type (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    if (sdp_validate_qos_attr(qos_attr) == FALSE) {
+        if (sdp_p->debug_flag[SDP_DEBUG_WARNINGS]) {
+            SDPLogDebug(logTag, "%s Warning: Invalid QOS attribute specified "
+                     "for get qos status_type.", sdp_p->debug_str);
+        }
+        return (SDP_QOS_STATUS_TYPE_UNKNOWN);
+    }
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, qos_attr, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s %s attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str,
+                      sdp_get_attr_name(qos_attr), (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_QOS_STATUS_TYPE_UNKNOWN);
+    } else {
+        switch (qos_attr) {
+            case SDP_ATTR_CURR:
+                return (attr_p->attr.curr.status_type);
+            case SDP_ATTR_DES:
+                return (attr_p->attr.des.status_type);
+            case SDP_ATTR_CONF:
+                return (attr_p->attr.conf.status_type);
+            default:
+                return SDP_QOS_STATUS_TYPE_UNKNOWN;
+
+        }
+    }
+}
+
+/* Function:    sdp_attr_get_qos_confirm
+ * Description: Returns the value of the qos attribute confirm
+ *              parameter specified for the given attribute.  Returns TRUE if
+ *              the confirm parameter is specified.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              qos_attr    The specific type of qos attribute.  May be
+ *                          qos, secure, X-pc-qos, or X-qos.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Boolean value.
+ */
+tinybool sdp_attr_get_qos_confirm (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    if (sdp_validate_qos_attr(qos_attr) == FALSE) {
+        if (sdp_p->debug_flag[SDP_DEBUG_WARNINGS]) {
+            SDPLogDebug(logTag, "%s Warning: Invalid QOS attribute specified "
+                     "for get qos confirm.", sdp_p->debug_str);
+        }
+        return (FALSE);
+    }
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, qos_attr, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s %s attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str,
+                      sdp_get_attr_name(qos_attr), (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.qos.confirm);
+    }
+}
+
+/* Function:    sdp_attr_get_curr_type
+ * Description: Returns the value of the curr attribute status_type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_CURR_UNKNOWN_TYPE is
+ *              returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              qos_attr    The specific type of qos attribute.  May be
+ *                          qos, secure, X-pc-qos, or X-qos.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Curr type value.
+ */
+sdp_curr_type_e sdp_attr_get_curr_type (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, qos_attr, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s %s attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str,
+                      sdp_get_attr_name(qos_attr), (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_CURR_UNKNOWN_TYPE);
+    } else {
+        return (attr_p->attr.curr.type);
+    }
+}
+
+/* Function:    sdp_attr_get_des_type
+ * Description: Returns the value of the des attribute status_type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_DES_UNKNOWN_TYPE is
+ *              returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              qos_attr    The specific type of qos attribute.  May be
+ *                          qos, secure, X-pc-qos, or X-qos.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     DES type value.
+ */
+sdp_des_type_e sdp_attr_get_des_type (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, qos_attr, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s %s attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str,
+                      sdp_get_attr_name(qos_attr), (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_DES_UNKNOWN_TYPE);
+    } else {
+        return (attr_p->attr.des.type);
+    }
+}
+
+/* Function:    sdp_attr_get_conf_type
+ * Description: Returns the value of the des attribute status_type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_CONF_UNKNOWN_TYPE is
+ *              returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              qos_attr    The specific type of qos attribute.  May be
+ *                          qos, secure, X-pc-qos, or X-qos.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CONF type value.
+ */
+sdp_conf_type_e sdp_attr_get_conf_type (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, qos_attr, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s %s attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str,
+                      sdp_get_attr_name(qos_attr), (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_CONF_UNKNOWN_TYPE);
+    } else {
+        return (attr_p->attr.conf.type);
+    }
+}
+
+/* Function:    sdp_attr_get_subnet_nettype
+ * Description: Returns the value of the subnet attribute network type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_NT_INVALID is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Nettype value.
+ */
+sdp_nettype_e sdp_attr_get_subnet_nettype (sdp_t *sdp_p, uint16_t level,
+                                           uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SUBNET, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Subnet attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_NT_INVALID);
+    } else {
+        return (attr_p->attr.subnet.nettype);
+    }
+}
+
+/* Function:    sdp_attr_get_subnet_addrtype
+ * Description: Returns the value of the subnet attribute address type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_AT_INVALID is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Addrtype value.
+ */
+sdp_addrtype_e sdp_attr_get_subnet_addrtype (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SUBNET, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Subnet attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_AT_INVALID);
+    } else {
+        return (attr_p->attr.subnet.addrtype);
+    }
+}
+
+/* Function:    sdp_attr_get_subnet_addr
+ * Description: Returns the value of the subnet attribute address
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, NULL is returned.  Value is
+ *              returned as a const ptr and so cannot be modified by the
+ *              application.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Pointer to address or NULL.
+ */
+const char *sdp_attr_get_subnet_addr (sdp_t *sdp_p, uint16_t level,
+                                      uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SUBNET, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Subnet attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        return (attr_p->attr.subnet.addr);
+    }
+}
+
+/* Function:    sdp_attr_get_subnet_prefix
+ * Description: Returns the value of the subnet attribute prefix
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_INVALID_PARAM is returned.
+ *              Note that this is value is defined to be (-2) and is
+ *              different from the return code SDP_INVALID_PARAMETER.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Prefix value or SDP_INVALID_PARAM.
+ */
+int32_t sdp_attr_get_subnet_prefix (sdp_t *sdp_p, uint16_t level,
+                                  uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SUBNET, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Subnet attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.subnet.prefix);
+    }
+}
+
+/* Function:    sdp_attr_rtpmap_payload_valid
+ * Description: Returns true or false depending on whether an rtpmap
+ *              attribute was specified with the given payload value
+ *              at the given level.  If it was, the instance number of
+ *              that attribute is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number of the attribute
+ *                          found is returned via this param.
+ * Returns:     TRUE or FALSE.
+ */
+tinybool sdp_attr_rtpmap_payload_valid (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                        uint16_t *inst_num, uint16_t payload_type)
+{
+    uint16_t          i;
+    sdp_attr_t  *attr_p;
+    uint16_t          num_instances;
+
+    *inst_num = 0;
+
+    if (sdp_attr_num_instances(sdp_p, level, cap_num,
+                          SDP_ATTR_RTPMAP, &num_instances) != SDP_SUCCESS) {
+        return (FALSE);
+    }
+
+    for (i=1; i <= num_instances; i++) {
+        attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_RTPMAP, i);
+        if ((attr_p != NULL) &&
+            (attr_p->attr.transport_map.payload_num == payload_type)) {
+            *inst_num = i;
+            return (TRUE);
+        }
+    }
+
+    return (FALSE);
+}
+
+/* Function:    sdp_attr_get_rtpmap_payload_type
+ * Description: Returns the value of the rtpmap attribute payload type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Payload type value.
+ */
+uint16_t sdp_attr_get_rtpmap_payload_type (sdp_t *sdp_p, uint16_t level,
+                                      uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_RTPMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtpmap attribute, level %u instance %u "
+                                "not found.",
+                                sdp_p->debug_str,
+                                (unsigned)level,
+                                (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.transport_map.payload_num);
+    }
+}
+
+/* Function:    sdp_attr_get_rtpmap_encname
+ * Description: Returns a pointer to the value of the encoding name
+ *              parameter specified for the given attribute.  Value is
+ *              returned as a const ptr and so cannot be modified by the
+ *              application.  If the given attribute is not defined, NULL
+ *              will be returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Codec value or SDP_CODEC_INVALID.
+ */
+const char *sdp_attr_get_rtpmap_encname (sdp_t *sdp_p, uint16_t level,
+                                         uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_RTPMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtpmap attribute, level %u instance %u "
+                                "not found.",
+                                sdp_p->debug_str,
+                                (unsigned)level,
+                                (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        return (attr_p->attr.transport_map.encname);
+    }
+}
+
+/* Function:    sdp_attr_get_rtpmap_clockrate
+ * Description: Returns the value of the rtpmap attribute clockrate
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Clockrate value.
+ */
+uint32_t sdp_attr_get_rtpmap_clockrate (sdp_t *sdp_p, uint16_t level,
+                                   uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_RTPMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtpmap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.transport_map.clockrate);
+    }
+}
+
+/* Function:    sdp_attr_get_rtpmap_num_chan
+ * Description: Returns the value of the rtpmap attribute num_chan
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Number of channels param or zero.
+ */
+uint16_t sdp_attr_get_rtpmap_num_chan (sdp_t *sdp_p, uint16_t level,
+                                  uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_RTPMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtpmap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.transport_map.num_chan);
+    }
+}
+
+/* Function:    sdp_attr_get_ice_attribute
+ * Description: Returns the value of an ice attribute at a given level
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              ice_attrib  Returns an ice attrib string
+ * Returns:
+ *              SDP_SUCCESS           Attribute param was set successfully.
+ *              SDP_INVALID_SDP_PTR   SDP pointer invalid
+ *              SDP_INVALID_PARAMETER Specified attribute is not defined.
+ */
+
+sdp_result_e sdp_attr_get_ice_attribute (sdp_t *sdp_p, uint16_t level,
+                                  uint8_t cap_num, sdp_attr_e sdp_attr, uint16_t inst_num,
+                                  char **out)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, sdp_attr, inst_num);
+    if (attr_p != NULL) {
+        *out = attr_p->attr.ice_attr;
+        return (SDP_SUCCESS);
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s ice attribute, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+}
+
+/* Function:    sdp_attr_is_present
+ * Description: Returns a boolean value based on attribute being present or
+ *              not
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              attr_type   The attribute type.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ * Returns:
+ *              Boolean value.
+ */
+
+tinybool sdp_attr_is_present (sdp_t *sdp_p, sdp_attr_e attr_type, uint16_t level,
+                              uint8_t cap_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, attr_type, 1);
+    if (attr_p != NULL) {
+        return (TRUE);
+    }
+    if (sdp_p->debug_flag[SDP_DEBUG_WARNINGS]) {
+        SDPLogDebug(logTag, "%s Attribute %s, level %u not found.",
+                    sdp_p->debug_str, sdp_get_attr_name(attr_type), level);
+    }
+
+    return (FALSE);
+}
+
+
+
+/* Function:    sdp_attr_get_rtcp_mux_attribute
+ * Description: Returns the value of an rtcp-mux attribute at a given level
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              rtcp_mux    Returns an rtcp-mux attrib bool
+ * Returns:
+ *              SDP_SUCCESS           Attribute param was set successfully.
+ *              SDP_INVALID_SDP_PTR   SDP pointer invalid
+ *              SDP_INVALID_PARAMETER Specified attribute is not defined.
+ */
+sdp_result_e sdp_attr_get_rtcp_mux_attribute (sdp_t *sdp_p, uint16_t level,
+                                  uint8_t cap_num, sdp_attr_e sdp_attr, uint16_t inst_num,
+                                  tinybool *rtcp_mux)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, sdp_attr, inst_num);
+    if (attr_p != NULL) {
+        *rtcp_mux = attr_p->attr.boolean_val;
+        return (SDP_SUCCESS);
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s rtcp-mux attribute, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+}
+
+/* Function:    sdp_attr_get_setup_attribute
+ * Description: Returns the value of a setup attribute at a given level
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              setup_type  Returns sdp_setup_type_e enum
+ * Returns:
+ *              SDP_SUCCESS           Attribute param was set successfully.
+ *              SDP_INVALID_SDP_PTR   SDP pointer invalid
+ *              SDP_INVALID_PARAMETER Specified attribute is not defined.
+ */
+sdp_result_e sdp_attr_get_setup_attribute (sdp_t *sdp_p, uint16_t level,
+    uint8_t cap_num, uint16_t inst_num, sdp_setup_type_e *setup_type)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SETUP, inst_num);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag,
+                "%s setup attribute, level %u instance %u not found.",
+                sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return SDP_INVALID_PARAMETER;
+    }
+
+    *setup_type = attr_p->attr.setup;
+    return SDP_SUCCESS;
+}
+
+/* Function:    sdp_attr_get_connection_attribute
+ * Description: Returns the value of a connection attribute at a given level
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              connection_type  Returns sdp_connection_type_e enum
+ * Returns:
+ *              SDP_SUCCESS           Attribute param was set successfully.
+ *              SDP_INVALID_SDP_PTR   SDP pointer invalid
+ *              SDP_INVALID_PARAMETER Specified attribute is not defined.
+ */
+sdp_result_e sdp_attr_get_connection_attribute (sdp_t *sdp_p, uint16_t level,
+    uint8_t cap_num, uint16_t inst_num, sdp_connection_type_e *connection_type)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_CONNECTION,
+        inst_num);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag,
+                "%s setup attribute, level %u instance %u not found.",
+                sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return SDP_INVALID_PARAMETER;
+    }
+
+    *connection_type = attr_p->attr.connection;
+    return SDP_SUCCESS;
+}
+
+/* Function:    sdp_attr_get_dtls_fingerprint_attribute
+ * Description: Returns the value of dtls fingerprint attribute at a given level
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              dtls_fingerprint  Returns an dtls fingerprint attrib string
+ * Returns:
+ *              SDP_SUCCESS           Attribute param was set successfully.
+ *              SDP_INVALID_SDP_PTR   SDP pointer invalid
+ *              SDP_INVALID_PARAMETER Specified attribute is not defined.
+ */
+sdp_result_e sdp_attr_get_dtls_fingerprint_attribute (sdp_t *sdp_p, uint16_t level,
+                                  uint8_t cap_num, sdp_attr_e sdp_attr, uint16_t inst_num,
+                                  char **out)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, sdp_attr, inst_num);
+    if (attr_p != NULL) {
+        *out = attr_p->attr.string_val;
+        return (SDP_SUCCESS);
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s dtls fingerprint attribute, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+}
+
+/* Function:    sdp_attr_sprtmap_payload_valid
+ * Description: Returns true or false depending on whether an sprtmap
+ *              attribute was specified with the given payload value
+ *              at the given level.  If it was, the instance number of
+ *              that attribute is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number of the attribute
+ *                          found is returned via this param.
+ * Returns:     TRUE or FALSE.
+ */
+tinybool sdp_attr_sprtmap_payload_valid (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                        uint16_t *inst_num, uint16_t payload_type)
+{
+    uint16_t          i;
+    sdp_attr_t  *attr_p;
+    uint16_t          num_instances;
+
+    *inst_num = 0;
+
+    if (sdp_attr_num_instances(sdp_p, level, cap_num,
+                          SDP_ATTR_SPRTMAP, &num_instances) != SDP_SUCCESS) {
+        return (FALSE);
+    }
+
+    for (i=1; i <= num_instances; i++) {
+        attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SPRTMAP, i);
+        if ((attr_p != NULL) &&
+            (attr_p->attr.transport_map.payload_num == payload_type)) {
+            *inst_num = i;
+            return (TRUE);
+        }
+    }
+
+    return (FALSE);
+}
+
+/* Function:    sdp_attr_get_sprtmap_payload_type
+ * Description: Returns the value of the sprtmap attribute payload type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Payload type value.
+ */
+uint16_t sdp_attr_get_sprtmap_payload_type (sdp_t *sdp_p, uint16_t level,
+                                      uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SPRTMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s sprtmap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.transport_map.payload_num);
+    }
+}
+
+/* Function:    sdp_attr_get_sprtmap_encname
+ * Description: Returns a pointer to the value of the encoding name
+ *              parameter specified for the given attribute.  Value is
+ *              returned as a const ptr and so cannot be modified by the
+ *              application.  If the given attribute is not defined, NULL
+ *              will be returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Codec value or SDP_CODEC_INVALID.
+ */
+const char *sdp_attr_get_sprtmap_encname (sdp_t *sdp_p, uint16_t level,
+                                         uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SPRTMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s sprtmap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        return (attr_p->attr.transport_map.encname);
+    }
+}
+
+/* Function:    sdp_attr_get_sprtmap_clockrate
+ * Description: Returns the value of the sprtmap attribute clockrate
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Clockrate value.
+ */
+uint32_t sdp_attr_get_sprtmap_clockrate (sdp_t *sdp_p, uint16_t level,
+                                   uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SPRTMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s sprtmap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.transport_map.clockrate);
+    }
+}
+
+/* Function:    sdp_attr_get_sprtmap_num_chan
+ * Description: Returns the value of the sprtmap attribute num_chan
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Number of channels param or zero.
+ */
+uint16_t sdp_attr_get_sprtmap_num_chan (sdp_t *sdp_p, uint16_t level,
+                                  uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SPRTMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s sprtmap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.transport_map.num_chan);
+    }
+}
+
+/* Note:  The fmtp attribute formats currently handled are:
+ *        fmtp:<payload type> <event>,<event>...
+ *        fmtp:<payload_type> [annexa=yes/no] [annexb=yes/no] [bitrate=<value>]
+ *        where "value" is a numeric value > 0
+ *        where each event is a single number or a range separated
+ *        by a '-'.
+ *        Example:  fmtp:101 1,3-15,20
+ */
+
+/* Function:    tinybool sdp_attr_fmtp_valid(sdp_t *sdp_p)
+ * Description: Returns true or false depending on whether an fmtp
+ *              attribute was specified with the given payload value
+ *              at the given level.  If it was, the instance number of
+ *              that attribute is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     TRUE or FALSE.
+ */
+tinybool sdp_attr_fmtp_payload_valid (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                      uint16_t *inst_num, uint16_t payload_type)
+{
+    uint16_t          i;
+    sdp_attr_t  *attr_p;
+    uint16_t          num_instances;
+
+    if (sdp_attr_num_instances(sdp_p, level, cap_num,
+                               SDP_ATTR_FMTP, &num_instances) != SDP_SUCCESS) {
+        return (FALSE);
+    }
+
+    for (i=1; i <= num_instances; i++) {
+        attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, i);
+        if ((attr_p != NULL) &&
+            (attr_p->attr.fmtp.payload_num == payload_type)) {
+            *inst_num = i;
+            return (TRUE);
+        }
+    }
+
+    return (FALSE);
+}
+
+/* Function:    sdp_attr_get_fmtp_payload_type
+ * Description: Returns the value of the fmtp attribute payload type
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Payload type value.
+ */
+uint16_t sdp_attr_get_fmtp_payload_type (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.fmtp.payload_num);
+    }
+}
+
+
+/* Function:    sdp_attr_fmtp_is_range_set
+ * Description: Determines if a range of events is set in an fmtp attribute.
+ *              The overall range for events is 0-255.
+ *              This will return either FULL_MATCH, PARTIAL_MATCH, or NO_MATCH
+ *              depending on whether all, some, or none of the specified
+ *              events are defined. If the given attribute is not defined,
+ *              NO_MATCH will be returned.  It is up to the appl to verify
+ *              the validity of the attribute before calling this routine.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              low_val     Low value of the range. Range is 0-255.
+ *              high_val    High value of the range.
+ * Returns:     SDP_FULL_MATCH, SDP_PARTIAL_MATCH, SDP_NO_MATCH
+ */
+sdp_ne_res_e sdp_attr_fmtp_is_range_set (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                         uint16_t inst_num, uint8_t low_val, uint8_t high_val)
+{
+    uint16_t          i;
+    uint32_t          mapword;
+    uint32_t          bmap;
+    uint32_t          num_vals = 0;
+    uint32_t          num_vals_set = 0;
+    sdp_attr_t  *attr_p;
+    sdp_fmtp_t  *fmtp_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_NO_MATCH);
+    }
+
+    fmtp_p = &(attr_p->attr.fmtp);
+    for (i = low_val; i <= high_val; i++) {
+        num_vals++;
+        mapword = i/SDP_NE_BITS_PER_WORD;
+        bmap = SDP_NE_BIT_0 << (i%32);
+        if (fmtp_p->bmap[ mapword ] & bmap) {
+            num_vals_set++;
+        }
+    }
+
+    if (num_vals == num_vals_set) {
+        return (SDP_FULL_MATCH);
+    } else if (num_vals_set == 0) {
+        return (SDP_NO_MATCH);
+    } else {
+        return (SDP_PARTIAL_MATCH);
+    }
+}
+
+/* Function:    sdp_attr_fmtp_valid
+ * Description: Determines the validity of the events in the fmtp.
+ *              The overall range for events is 0-255.
+ *              The user passes an event list with valid events supported by Appl.
+ *              This routine will do a simple AND comparison and report the result.
+ *
+ *              This will return TRUE if ftmp events are valid, and FALSE otherwise.
+ *              It is up to the appl to verify the validity of the attribute
+ *              before calling this routine.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              appl_maxval Max event value supported by Appl. Range is 0-255.
+ *              evt_array   Bitmap containing events supported by application.
+ * Returns:     TRUE, FALSE
+ */
+tinybool
+sdp_attr_fmtp_valid(sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                    uint16_t inst_num, uint16_t appl_maxval, uint32_t* evt_array)
+{
+    uint16_t          i;
+    uint32_t          mapword;
+    sdp_attr_t  *attr_p;
+    sdp_fmtp_t  *fmtp_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return FALSE;
+    }
+
+    fmtp_p = &(attr_p->attr.fmtp);
+
+    /* Do quick test. If application max value is lower than fmtp's then error */
+    if (fmtp_p->maxval > appl_maxval)
+      return FALSE;
+
+    /* Ok, events are within range. Now check that only
+     * allowed events have been received
+     */
+    mapword = appl_maxval/SDP_NE_BITS_PER_WORD;
+    for (i=0; i<mapword; i++) {
+      if (fmtp_p->bmap[i] & ~(evt_array[i])) {
+        /* Remote SDP is requesting events not supported by Application */
+        return FALSE;
+      }
+    }
+    return TRUE;
+}
+
+/* Function:    sdp_attr_set_fmtp_payload_type
+ * Description: Sets the value of the fmtp attribute payload type parameter
+ *              for the given attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              payload_type New payload type value.
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e sdp_attr_set_fmtp_payload_type (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint16_t inst_num,
+                                             uint16_t payload_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        attr_p->attr.fmtp.payload_num = payload_num;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_range
+ * Description: Get a range of named events for an fmtp attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              bmap        The 8 word data array holding the bitmap
+ * Returns:     SDP_SUCCESS
+ */
+sdp_result_e sdp_attr_get_fmtp_range (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                      uint16_t inst_num, uint32_t *bmap)
+{
+    sdp_attr_t  *attr_p;
+    sdp_fmtp_t  *fmtp_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    fmtp_p = &(attr_p->attr.fmtp);
+    memcpy(bmap, fmtp_p->bmap, SDP_NE_NUM_BMAP_WORDS * sizeof(uint32_t) );
+
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_clear_fmtp_range
+ * Description: Clear a range of named events for an fmtp attribute. The low
+ *              value specified must be <= the high value.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              low_val     The low value of the range. Range is 0-255
+ *              high_val    The high value of the range.  May be == low.
+ * Returns:     SDP_SUCCESS
+ */
+sdp_result_e sdp_attr_clear_fmtp_range (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                        uint16_t inst_num, uint8_t low_val, uint8_t high_val)
+{
+    uint16_t          i;
+    uint32_t          mapword;
+    uint32_t          bmap;
+    sdp_attr_t  *attr_p;
+    sdp_fmtp_t  *fmtp_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    fmtp_p = &(attr_p->attr.fmtp);
+    for (i = low_val; i <= high_val; i++) {
+        mapword = i/SDP_NE_BITS_PER_WORD;
+        bmap = SDP_NE_BIT_0 << (i%32);
+        fmtp_p->bmap[ mapword ] &= ~bmap;
+    }
+    if (high_val > fmtp_p->maxval) {
+        fmtp_p->maxval = high_val;
+    }
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_compare_fmtp_ranges
+ * Description: Compare the named events set of two fmtp attributes. If all
+ *              events are the same (either set or not), FULL_MATCH will be
+ *              returned.  If no events match, NO_MATCH will be returned.
+ *              Otherwise PARTIAL_MATCH will be returned.  If either attr is
+ *              invalid, NO_MATCH will be returned.
+ * Parameters:  src_sdp_p The SDP handle returned by sdp_init_description.
+ *              dst_sdp_p The SDP handle returned by sdp_init_description.
+ *              src_level   The level of the src fmtp attribute.
+ *              dst_level   The level to the dst fmtp attribute.
+ *              src_cap_num The capability number of the src attr.
+ *              dst_cap_num The capability number of the dst attr.
+ *              src_inst_numh The attribute instance of the src attr.
+ *              dst_inst_numh The attribute instance of the dst attr.
+ * Returns:     SDP_FULL_MATCH, SDP_PARTIAL_MATCH, SDP_NO_MATCH.
+ */
+sdp_ne_res_e sdp_attr_compare_fmtp_ranges (sdp_t *src_sdp_p,sdp_t *dst_sdp_p,
+                                           uint16_t src_level, uint16_t dst_level,
+                                           uint8_t src_cap_num, uint8_t dst_cap_num,
+                                           uint16_t src_inst_num, uint16_t dst_inst_num)
+{
+    uint16_t          i,j;
+    uint32_t          bmap;
+    uint32_t          num_vals_match = 0;
+    sdp_attr_t  *src_attr_p;
+    sdp_attr_t  *dst_attr_p;
+    sdp_fmtp_t  *src_fmtp_p;
+    sdp_fmtp_t  *dst_fmtp_p;
+
+    src_attr_p = sdp_find_attr(src_sdp_p, src_level, src_cap_num,
+                               SDP_ATTR_FMTP, src_inst_num);
+    dst_attr_p = sdp_find_attr(dst_sdp_p, dst_level, dst_cap_num,
+                               SDP_ATTR_FMTP, dst_inst_num);
+    if ((src_attr_p == NULL) || (dst_attr_p == NULL)) {
+        if (src_sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s source or destination fmtp attribute for "
+                      "compare not found.", src_sdp_p->debug_str);
+        }
+        src_sdp_p->conf_p->num_invalid_param++;
+        return (SDP_NO_MATCH);
+    }
+
+    src_fmtp_p = &(src_attr_p->attr.fmtp);
+    dst_fmtp_p = &(dst_attr_p->attr.fmtp);
+    for (i = 0; i < SDP_NE_NUM_BMAP_WORDS; i++) {
+        for (j = 0; j < SDP_NE_BITS_PER_WORD; j++) {
+            bmap = SDP_NE_BIT_0 << j;
+            if ((src_fmtp_p->bmap[i] & bmap) && (dst_fmtp_p->bmap[i] & bmap)) {
+                num_vals_match++;
+            } else if ((!(src_fmtp_p->bmap[i] & bmap)) &&
+                       (!(dst_fmtp_p->bmap[i] & bmap))) {
+                num_vals_match++;
+            }
+        }
+    }
+
+    if (num_vals_match == (SDP_NE_NUM_BMAP_WORDS * SDP_NE_BITS_PER_WORD)) {
+        return (SDP_FULL_MATCH);
+    } else if (num_vals_match == 0) {
+        return (SDP_NO_MATCH);
+    } else {
+        return (SDP_PARTIAL_MATCH);
+    }
+}
+
+/* Function:    sdp_attr_copy_fmtp_ranges
+ * Description: Copy the named events set for one fmtp attribute to another.
+ * Parameters:  src_sdp_p The SDP handle returned by sdp_init_description.
+ *              dst_sdp_p The SDP handle returned by sdp_init_description.
+ *              src_level   The level of the src fmtp attribute.
+ *              dst_level   The level to the dst fmtp attribute.
+ *              src_cap_num The capability number of the src attr.
+ *              dst_cap_num The capability number of the dst attr.
+ *              src_inst_numh The attribute instance of the src attr.
+ *              dst_inst_numh The attribute instance of the dst attr.
+ * Returns:     SDP_SUCCESS
+ */
+sdp_result_e sdp_attr_copy_fmtp_ranges (sdp_t *src_sdp_p, sdp_t *dst_sdp_p,
+                                        uint16_t src_level, uint16_t dst_level,
+                                        uint8_t src_cap_num, uint8_t dst_cap_num,
+                                        uint16_t src_inst_num, uint16_t dst_inst_num)
+{
+    uint16_t          i;
+    sdp_attr_t  *src_attr_p;
+    sdp_attr_t  *dst_attr_p;
+    sdp_fmtp_t  *src_fmtp_p;
+    sdp_fmtp_t  *dst_fmtp_p;
+
+    if (!src_sdp_p || !dst_sdp_p) {
+        return (SDP_INVALID_SDP_PTR);
+    }
+
+    src_attr_p = sdp_find_attr(src_sdp_p, src_level, src_cap_num,
+                               SDP_ATTR_FMTP, src_inst_num);
+    dst_attr_p = sdp_find_attr(dst_sdp_p, dst_level, dst_cap_num,
+                               SDP_ATTR_FMTP, dst_inst_num);
+    if ((src_attr_p == NULL) || (dst_attr_p == NULL)) {
+        if (src_sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s source or destination fmtp attribute for "
+                      "copy not found.", src_sdp_p->debug_str);
+        }
+        src_sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    src_fmtp_p = &(src_attr_p->attr.fmtp);
+    dst_fmtp_p = &(dst_attr_p->attr.fmtp);
+    dst_fmtp_p->maxval = src_fmtp_p->maxval;
+    for (i = 0; i < SDP_NE_NUM_BMAP_WORDS; i++) {
+        dst_fmtp_p->bmap[i] = src_fmtp_p->bmap[i];
+    }
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_get_fmtp_mode
+ * Description: Gets the value of the fmtp attribute mode parameter
+ *              for the given attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              payload_type payload type.
+ * Returns:     mode value or zero if mode attribute not found
+ */
+uint32_t sdp_attr_get_fmtp_mode_for_payload_type (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint32_t payload_type)
+{
+    uint16_t          num_a_lines = 0;
+    int          i;
+    sdp_attr_t  *attr_p;
+
+    /*
+     * Get number of FMTP attributes for the AUDIO line
+     */
+    (void) sdp_attr_num_instances(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                                  &num_a_lines);
+    for (i = 0; i < num_a_lines; i++) {
+        attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, (uint16_t) (i + 1));
+        if ((attr_p != NULL) &&
+            (attr_p->attr.fmtp.payload_num == (uint16_t)payload_type)) {
+            if (attr_p->attr.fmtp.fmtp_format == SDP_FMTP_MODE) {
+                return attr_p->attr.fmtp.mode;
+            }
+        }
+    }
+   return 0;
+}
+
+sdp_result_e sdp_attr_set_fmtp_max_fs (sdp_t *sdp_p, uint16_t level,
+                                       uint8_t cap_num, uint16_t inst_num,
+                                       uint32_t max_fs)
+{
+    sdp_attr_t  *attr_p;
+    sdp_fmtp_t  *fmtp_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    fmtp_p = &(attr_p->attr.fmtp);
+    fmtp_p->fmtp_format = SDP_FMTP_CODEC_INFO;
+
+    if (max_fs > 0) {
+        fmtp_p->max_fs  = max_fs;
+        return (SDP_SUCCESS);
+    } else {
+        return (SDP_FAILURE);
+    }
+}
+
+sdp_result_e sdp_attr_set_fmtp_max_fr (sdp_t *sdp_p, uint16_t level,
+                                       uint8_t cap_num, uint16_t inst_num,
+                                       uint32_t max_fr)
+{
+    sdp_attr_t  *attr_p;
+    sdp_fmtp_t  *fmtp_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    fmtp_p = &(attr_p->attr.fmtp);
+    fmtp_p->fmtp_format = SDP_FMTP_CODEC_INFO;
+
+    if (max_fr > 0) {
+        fmtp_p->max_fr  = max_fr;
+        return (SDP_SUCCESS);
+    } else {
+        return (SDP_FAILURE);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_max_average_bitrate
+ * Description: Gets the value of the fmtp attribute- maxaveragebitrate parameter for the OPUS codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-br value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_max_average_bitrate (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, uint32_t* val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP, 1);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.maxaveragebitrate;
+        return (SDP_SUCCESS);
+    }
+}
+
+
+/* Function:    sdp_attr_get_fmtp_usedtx
+ * Description: Gets the value of the fmtp attribute- usedtx parameter for the OPUS codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     usedtx value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_usedtx (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, tinybool* val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = (tinybool)attr_p->attr.fmtp.usedtx;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_usedtx
+ * Description: Gets the value of the fmtp attribute- usedtx parameter for the OPUS codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     stereo value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_stereo (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, tinybool* val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = (tinybool)attr_p->attr.fmtp.stereo;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_useinbandfec
+ * Description: Gets the value of the fmtp attribute useinbandfec parameter for the OPUS codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     useinbandfec value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_useinbandfec (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, tinybool* val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = (tinybool)attr_p->attr.fmtp.useinbandfec;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_maxcodedaudiobandwidth
+ * Description: Gets the value of the fmtp attribute maxcodedaudiobandwidth parameter for OPUS codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     maxcodedaudiobandwidth value.
+ */
+char* sdp_attr_get_fmtp_maxcodedaudiobandwidth (sdp_t *sdp_p, uint16_t level,
+                                          uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.fmtp.maxcodedaudiobandwidth);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_cbr
+ * Description: Gets the value of the fmtp attribute cbr parameter for the OPUS codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     cbr value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_cbr (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, tinybool* val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = (tinybool)attr_p->attr.fmtp.cbr;
+        return (SDP_SUCCESS);
+    }
+}
+
+uint16_t sdp_attr_get_sctpmap_port(sdp_t *sdp_p, uint16_t level,
+                              uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SCTPMAP, inst_num);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s sctpmap port, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return 0;
+    } else {
+        return attr_p->attr.sctpmap.port;
+    }
+}
+
+sdp_result_e sdp_attr_get_sctpmap_streams (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, uint32_t* val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SCTPMAP, inst_num);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s sctpmap streams, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.sctpmap.streams;
+        return (SDP_SUCCESS);
+    }
+}
+
+sdp_result_e sdp_attr_get_sctpmap_protocol (sdp_t *sdp_p, uint16_t level,
+                                            uint8_t cap_num, uint16_t inst_num,
+                                            char* protocol)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_SCTPMAP,
+                           inst_num);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s sctpmap, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        sstrncpy(protocol, attr_p->attr.sctpmap.protocol, SDP_MAX_STRING_LEN+1);
+    }
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_fmtp_is_annexb_set
+ * Description: Gives the value of the fmtp attribute annexb type parameter
+ *              for the given attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *
+ *
+ * Returns:     TRUE or FALSE.
+ */
+tinybool sdp_attr_fmtp_is_annexb_set (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                      uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.fmtp.annexb);
+    }
+}
+
+/* Function:    sdp_attr_fmtp_is_annexa_set
+ * Description: Gives the value of the fmtp attribute annexa type parameter
+ *              for the given attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *
+ *
+ * Returns:     TRUE or FALSE.
+ */
+tinybool sdp_attr_fmtp_is_annexa_set (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                      uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.fmtp.annexa);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_bitrate_type
+ * Description: Gets the value of the fmtp attribute bitrate type parameter
+ *              for the given attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Bitrate type value.
+ */
+int32_t sdp_attr_get_fmtp_bitrate_type (sdp_t *sdp_p, uint16_t level,
+                                      uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.bitrate);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_qcif
+ * Description: Gets the value of the fmtp attribute QCIF type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     QCIF value.
+ */
+int32_t sdp_attr_get_fmtp_qcif (sdp_t *sdp_p, uint16_t level,
+                            uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.qcif);
+    }
+}
+/* Function:    sdp_attr_get_fmtp_cif
+ * Description: Gets the value of the fmtp attribute CIF type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CIF value.
+ */
+int32_t sdp_attr_get_fmtp_cif (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.cif);
+    }
+}
+
+
+/* Function:    sdp_attr_get_fmtp_sqcif
+ * Description: Gets the value of the fmtp attribute sqcif type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     sqcif value.
+ */
+int32_t sdp_attr_get_fmtp_sqcif (sdp_t *sdp_p, uint16_t level,
+                               uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.sqcif);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_cif4
+ * Description: Gets the value of the fmtp attribute CIF4 type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CIF4 value.
+ */
+int32_t sdp_attr_get_fmtp_cif4 (sdp_t *sdp_p, uint16_t level,
+                              uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.cif4);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_cif16
+ * Description: Gets the value of the fmtp attribute CIF16 type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CIF16 value.
+ */
+
+int32_t sdp_attr_get_fmtp_cif16 (sdp_t *sdp_p, uint16_t level,
+                               uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.cif16);
+    }
+}
+
+
+/* Function:    sdp_attr_get_fmtp_maxbr
+ * Description: Gets the value of the fmtp attribute MAXBR type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     MAXBR value.
+ */
+int32_t sdp_attr_get_fmtp_maxbr (sdp_t *sdp_p, uint16_t level,
+                               uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.maxbr);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_custom_x
+ * Description: Gets the value of the fmtp attribute CUSTOM type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CUSTOM x value.
+ */
+
+int32_t sdp_attr_get_fmtp_custom_x (sdp_t *sdp_p, uint16_t level,
+                                  uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.custom_x);
+    }
+}
+/* Function:    sdp_attr_get_fmtp_custom_y
+ * Description: Gets the value of the fmtp attribute custom_y type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CUSTOM Y-AXIS value.
+ */
+
+int32_t sdp_attr_get_fmtp_custom_y (sdp_t *sdp_p, uint16_t level,
+                                  uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.custom_y);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_custom_mpi
+ * Description: Gets the value of the fmtp attribute CUSTOM type parameter
+ *              for a given Video codec.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CUSTOM MPI value.
+ */
+
+int32_t sdp_attr_get_fmtp_custom_mpi (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.custom_mpi);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_par_width
+ * Description: Gets the value of the fmtp attribute PAR (width) parameter
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     PAR - width value.
+ */
+int32_t sdp_attr_get_fmtp_par_width (sdp_t *sdp_p, uint16_t level,
+                                   uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.par_width);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_par_height
+ * Description: Gets the value of the fmtp attribute PAR (height) parameter
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     PAR - height value.
+ */
+int32_t sdp_attr_get_fmtp_par_height (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.par_height);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_cpcf
+ * Description: Gets the value of the fmtp attribute- CPCF parameter
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CPCF value.
+ */
+int32_t sdp_attr_get_fmtp_cpcf (sdp_t *sdp_p, uint16_t level,
+                              uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.cpcf);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_bpp
+ * Description: Gets the value of the fmtp attribute- BPP parameter
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     BPP value.
+ */
+int32_t sdp_attr_get_fmtp_bpp (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.bpp);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_hrd
+ * Description: Gets the value of the fmtp attribute- HRD parameter
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     HRD value.
+ */
+int32_t sdp_attr_get_fmtp_hrd (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.hrd);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_profile
+ * Description: Gets the value of the fmtp attribute- PROFILE parameter
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     PROFILE value.
+ */
+int32_t sdp_attr_get_fmtp_profile (sdp_t *sdp_p, uint16_t level,
+                                 uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.profile);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_level
+ * Description: Gets the value of the fmtp attribute- LEVEL parameter
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     LEVEL value.
+ */
+int32_t sdp_attr_get_fmtp_level (sdp_t *sdp_p, uint16_t level,
+                               uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.level);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_interlace
+ * Description: Checks if INTERLACE parameter is set.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     TRUE if INTERLACE is present and FALSE if INTERLACE is absent.
+ */
+tinybool sdp_attr_get_fmtp_interlace (sdp_t *sdp_p, uint16_t level,
+                                      uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return FALSE;
+    } else {
+        return (attr_p->attr.fmtp.is_interlace);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_pack_mode
+ * Description: Gets the value of the fmtp attribute- packetization-mode parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     packetization-mode value in the range 0 - 2.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_pack_mode (sdp_t *sdp_p, uint16_t level,
+                                 uint8_t cap_num, uint16_t inst_num, uint16_t *val)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        if (SDP_INVALID_PACKETIZATION_MODE_VALUE == attr_p->attr.fmtp.packetization_mode) {
+            /* packetization mode unspecified (optional) */
+            *val = SDP_DEFAULT_PACKETIZATION_MODE_VALUE;
+        } else {
+            *val = attr_p->attr.fmtp.packetization_mode;
+        }
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_level_asymmetry_allowed
+ * Description: Gets the value of the fmtp attribute- level-asymmetry-allowed parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     level asymmetry allowed value (0 or 1).
+ */
+
+sdp_result_e sdp_attr_get_fmtp_level_asymmetry_allowed (sdp_t *sdp_p, uint16_t level,
+                                 uint8_t cap_num, uint16_t inst_num, uint16_t *val)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.level_asymmetry_allowed;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_profile_id
+ * Description: Gets the value of the fmtp attribute- profile-level-id parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     profile-level-id value.
+ */
+const char* sdp_attr_get_fmtp_profile_id (sdp_t *sdp_p, uint16_t level,
+                                          uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.fmtp.profile_level_id);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_param_sets
+ * Description: Gets the value of the fmtp attribute- parameter-sets parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     parameter-sets value.
+ */
+const char* sdp_attr_get_fmtp_param_sets (sdp_t *sdp_p, uint16_t level,
+                                          uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.fmtp.parameter_sets);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_interleaving_depth
+ * Description: Gets the value of the fmtp attribute- interleaving_depth parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     interleaving_depth value
+ */
+
+sdp_result_e sdp_attr_get_fmtp_interleaving_depth (sdp_t *sdp_p, uint16_t level,
+                                            uint8_t cap_num, uint16_t inst_num, uint16_t* val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.interleaving_depth;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_deint_buf_req
+ * Description: Gets the value of the fmtp attribute- deint-buf-req parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     deint-buf-req value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_deint_buf_req (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint16_t inst_num,
+                                             uint32_t *val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        if (attr_p->attr.fmtp.flag & SDP_DEINT_BUF_REQ_FLAG) {
+            *val = attr_p->attr.fmtp.deint_buf_req;
+            return (SDP_SUCCESS);
+        } else {
+            return (SDP_FAILURE);
+        }
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_max_don_diff
+ * Description: Gets the value of the fmtp attribute- max-don-diff parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-don-diff value.
+ */
+sdp_result_e sdp_attr_get_fmtp_max_don_diff (sdp_t *sdp_p, uint16_t level,
+                                      uint8_t cap_num, uint16_t inst_num,
+                                      uint32_t *val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.max_don_diff;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_init_buf_time
+ * Description: Gets the value of the fmtp attribute- init-buf-time parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     init-buf-time value.
+ */
+sdp_result_e sdp_attr_get_fmtp_init_buf_time (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint16_t inst_num,
+                                             uint32_t *val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        if (attr_p->attr.fmtp.flag & SDP_INIT_BUF_TIME_FLAG) {
+            *val = attr_p->attr.fmtp.init_buf_time;
+            return (SDP_SUCCESS);
+        } else {
+            return (SDP_FAILURE);
+        }
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_max_mbps
+ * Description: Gets the value of the fmtp attribute- max-mbps parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-mbps value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_max_mbps (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, uint16_t inst_num,
+                                uint32_t *val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.max_mbps;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_max_fs
+ * Description: Gets the value of the fmtp attribute- max-fs parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-fs value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_max_fs (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, uint32_t *val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.max_fs;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_max_fr
+ * Description: Gets the value of the fmtp attribute- max-fr parameter
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-fr value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_max_fr (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, uint32_t *val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.max_fr;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_max_cpb
+ * Description: Gets the value of the fmtp attribute- max-cpb parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-cpb value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_max_cpb (sdp_t *sdp_p, uint16_t level,
+                                 uint8_t cap_num, uint16_t inst_num, uint32_t *val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.max_cpb;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_max_dpb
+ * Description: Gets the value of the fmtp attribute- max-dpb parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-dpb value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_max_dpb (sdp_t *sdp_p, uint16_t level,
+                               uint8_t cap_num, uint16_t inst_num, uint32_t *val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.max_dpb;
+        return (SDP_SUCCESS);
+    }
+}
+
+
+/* Function:    sdp_attr_get_fmtp_max_br
+ * Description: Gets the value of the fmtp attribute- max-br parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-br value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_max_br (sdp_t *sdp_p, uint16_t level,
+                             uint8_t cap_num, uint16_t inst_num, uint32_t* val)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        *val = attr_p->attr.fmtp.max_br;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_fmtp_is_redundant_pic_cap
+ * Description: Gets the value of the fmtp attribute- redundant_pic_cap parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     redundant-pic-cap value.
+ */
+tinybool sdp_attr_fmtp_is_redundant_pic_cap (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.fmtp.redundant_pic_cap);
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_deint_buf_cap
+ * Description: Gets the value of the fmtp attribute- deint-buf-cap parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     deint-buf-cap value.
+ */
+
+sdp_result_e sdp_attr_get_fmtp_deint_buf_cap (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint16_t inst_num,
+                                             uint32_t *val)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        if (attr_p->attr.fmtp.flag & SDP_DEINT_BUF_CAP_FLAG) {
+            *val = attr_p->attr.fmtp.deint_buf_cap;
+            return (SDP_SUCCESS);
+        } else {
+            return (SDP_FAILURE);
+        }
+    }
+}
+
+/* Function:    sdp_attr_get_fmtp_max_rcmd_nalu_size
+ * Description: Gets the value of the fmtp attribute- max-rcmd-nalu-size parameter for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     max-rcmd-nalu-size value.
+ */
+sdp_result_e sdp_attr_get_fmtp_max_rcmd_nalu_size (sdp_t *sdp_p, uint16_t level,
+                                                  uint8_t cap_num, uint16_t inst_num,
+                                                  uint32_t *val)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        if (attr_p->attr.fmtp.flag & SDP_MAX_RCMD_NALU_SIZE_FLAG) {
+            *val = attr_p->attr.fmtp.max_rcmd_nalu_size;
+            return (SDP_SUCCESS);
+        } else {
+            return (SDP_FAILURE);
+        }
+    }
+}
+
+/* Function:    sdp_attr_fmtp_is_parameter_add
+ * Description: Gets the value of the fmtp attribute- parameter-add for H.264 codec
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     TRUE/FALSE ( parameter-add is boolean)
+ */
+tinybool sdp_attr_fmtp_is_parameter_add (sdp_t *sdp_p, uint16_t level,
+                                         uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        /* Both 1 and SDP_FMTP_UNUSED (parameter not present) should be
+         * treated as TRUE, per RFC 3984, page 45 */
+        return (attr_p->attr.fmtp.parameter_add != 0);
+    }
+}
+
+/****** Following functions are get routines for Annex values
+ * For each Annex support, the get routine will return the boolean TRUE/FALSE
+ * Some Annexures for Video codecs have values defined . In those cases,
+ * (e.g Annex K, P ) , the return values are not boolean.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Annex value
+ */
+
+tinybool sdp_attr_get_fmtp_annex_d (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.fmtp.annex_d);
+    }
+}
+
+tinybool sdp_attr_get_fmtp_annex_f (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.fmtp.annex_f);
+    }
+}
+
+tinybool sdp_attr_get_fmtp_annex_i (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.fmtp.annex_i);
+    }
+}
+
+tinybool sdp_attr_get_fmtp_annex_j (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.fmtp.annex_j);
+    }
+}
+
+tinybool sdp_attr_get_fmtp_annex_t (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.fmtp.annex_t);
+    }
+}
+
+int32_t sdp_attr_get_fmtp_annex_k_val (sdp_t *sdp_p, uint16_t level,
+                                     uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.annex_k_val);
+    }
+}
+
+int32_t sdp_attr_get_fmtp_annex_n_val (sdp_t *sdp_p, uint16_t level,
+                                     uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.annex_n_val);
+    }
+}
+
+int32_t sdp_attr_get_fmtp_annex_p_picture_resize (sdp_t *sdp_p, uint16_t level,
+                                                uint8_t cap_num, uint16_t inst_num)
+{
+
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.annex_p_val_picture_resize);
+    }
+}
+
+int32_t sdp_attr_get_fmtp_annex_p_warp (sdp_t *sdp_p, uint16_t level,
+                                      uint8_t cap_num, uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    } else {
+        return (attr_p->attr.fmtp.annex_p_val_warp);
+    }
+}
+
+/* Function:    sdp_attr_fmtp_get_fmtp_format
+ * Description: Gives the value of the fmtp attribute fmtp_format
+ *              type parameter
+ *              for the given attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *
+ *
+ * Returns:     Enum type sdp_fmtp_format_type_e
+ */
+sdp_fmtp_format_type_e  sdp_attr_fmtp_get_fmtp_format (sdp_t *sdp_p,
+                                                       uint16_t level, uint8_t cap_num,
+                                                       uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_FMTP,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s fmtp attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_FMTP_UNKNOWN_TYPE);
+    } else {
+        return (attr_p->attr.fmtp.fmtp_format);
+    }
+}
+
+/* Function:    sdp_attr_get_pccodec_num_payload_types
+ * Description: Returns the number of payload types specified for the
+ *              given X-pc-codec attribute.  If the given attribute is not
+ *              defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Number of payload types.
+ */
+uint16_t sdp_attr_get_pccodec_num_payload_types (sdp_t *sdp_p, uint16_t level,
+                                            uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_X_PC_CODEC,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-pc-codec attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        return (attr_p->attr.pccodec.num_payloads);
+    }
+}
+
+/* Function:    sdp_attr_get_pccodec_payload_type
+ * Description: Returns the value of the specified payload type for the
+ *              given X-pc-codec attribute.  If the given attribute is not
+ *              defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              payload_num The payload number to get.  Range is (1 -
+ *                          max num payloads).
+ * Returns:     Payload type.
+ */
+uint16_t sdp_attr_get_pccodec_payload_type (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                       uint16_t inst_num, uint16_t payload_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_X_PC_CODEC,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-pc-codec attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        if ((payload_num < 1) ||
+            (payload_num > attr_p->attr.pccodec.num_payloads)) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s X-pc-codec attribute, level %u instance %u, "
+                          "invalid payload number %u requested.",
+                          sdp_p->debug_str, (unsigned)level, (unsigned)inst_num, (unsigned)payload_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return (0);
+        } else {
+            return (attr_p->attr.pccodec.payload_type[payload_num-1]);
+        }
+    }
+}
+
+/* Function:    sdp_attr_add_pccodec_payload_type
+ * Description: Add a new value to the list of payload types specified for
+ *              the given X-pc-codec attribute.  The payload type will be
+ *              added to the end of the list so these values should be added
+ *              in the order they will be displayed within the attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              payload_type The payload type to add.
+ * Returns:     SDP_SUCCESS            Payload type was added successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e sdp_attr_add_pccodec_payload_type (sdp_t *sdp_p, uint16_t level,
+                                                uint8_t cap_num, uint16_t inst_num,
+                                                uint16_t payload_type)
+{
+    uint16_t          payload_num;
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_X_PC_CODEC,
+                           inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-pc-codec attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    } else {
+        payload_num = attr_p->attr.pccodec.num_payloads++;
+        attr_p->attr.pccodec.payload_type[payload_num] = payload_type;
+        return (SDP_SUCCESS);
+    }
+}
+
+/* Function:    sdp_attr_get_xcap_first_cap_num
+ * Description: Gets the first capability number valid for the specified
+ *              X-cap attribute instance.  If the capability is not
+ *              defined, zero is returned.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the capability.
+ *              inst_num    The X-cap instance number to check.
+ * Returns:     Capability number or zero.
+ */
+uint16_t sdp_attr_get_xcap_first_cap_num (sdp_t *sdp_p, uint16_t level, uint16_t inst_num)
+{
+    uint16_t          cap_num=1;
+    uint16_t          attr_count=0;
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *mca_p;
+
+    if (level == SDP_SESSION_LEVEL) {
+        for (attr_p = sdp_p->sess_attrs_p; attr_p != NULL;
+             attr_p = attr_p->next_p) {
+            if (attr_p->type == SDP_ATTR_X_CAP) {
+                attr_count++;
+                if (attr_count == inst_num) {
+                    return (cap_num);
+                } else {
+                    cap_num += attr_p->attr.cap_p->num_payloads;
+                }
+            }
+        }
+    } else {  /* Capability is at a media level */
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            sdp_p->conf_p->num_invalid_param++;
+            return (0);
+        }
+        for (attr_p = mca_p->media_attrs_p; attr_p != NULL;
+             attr_p = attr_p->next_p) {
+            if (attr_p->type == SDP_ATTR_X_CAP) {
+                attr_count++;
+                if (attr_count == inst_num) {
+                    return (cap_num);
+                } else {
+                    cap_num += attr_p->attr.cap_p->num_payloads;
+                }
+            }
+        }
+    }  /* Attr is at a media level */
+
+    if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+        SDPLogError(logTag, "%s X-cap attribute, level %u instance %u "
+                  "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+    }
+    sdp_p->conf_p->num_invalid_param++;
+    return (0);
+}
+
+/* Function:    sdp_attr_get_xcap_media_type
+ * Description: Returns the media type specified for the given X-cap
+ *              attribute.  If the given attribute is not defined,
+ *              SDP_MEDIA_INVALID is returned.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Media type or SDP_MEDIA_INVALID.
+ */
+sdp_media_e sdp_attr_get_xcap_media_type (sdp_t *sdp_p, uint16_t level,
+                                          uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cap_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_X_CAP, inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-cap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_MEDIA_INVALID);
+    } else {
+        cap_p = attr_p->attr.cap_p;
+        return (cap_p->media);
+    }
+}
+
+/* Function:    sdp_attr_get_xcap_transport_type
+ * Description: Returns the transport type specified for the given X-cap
+ *              attribute.  If the given attribute is not defined,
+ *              SDP_TRANSPORT_INVALID is returned.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Media type or SDP_TRANSPORT_INVALID.
+ */
+sdp_transport_e sdp_attr_get_xcap_transport_type (sdp_t *sdp_p, uint16_t level,
+                                                  uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cap_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_X_CAP,
+                           inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-cap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_TRANSPORT_INVALID);
+    } else {
+        cap_p = attr_p->attr.cap_p;
+        return (cap_p->transport);
+    }
+}
+
+/* Function:    sdp_attr_get_xcap_num_payload_types
+ * Description: Returns the number of payload types associated with the
+ *              specified X-cap attribute.  If the attribute is invalid,
+ *              zero will be returned.  Application must validate the
+ *              attribute line before using this routine.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Number of payload types or zero.
+ */
+uint16_t sdp_attr_get_xcap_num_payload_types (sdp_t *sdp_p, uint16_t level,
+                                         uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cap_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_X_CAP, inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-cap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        cap_p = attr_p->attr.cap_p;
+        return (cap_p->num_payloads);
+    }
+}
+
+/* Function:    sdp_attr_get_xcap_payload_type
+ * Description: Returns the payload type of the specified payload for the
+ *              X-cap attribute line.  If the attr line or payload number is
+ *              invalid, zero will be returned.  Application must validate
+ *              the X-cap attr before using this routine.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ *              payload_num The payload number to retrieve.  Range is
+ *                          (1 - max num payloads).
+ * Returns:     Payload type or zero.
+ */
+uint16_t sdp_attr_get_xcap_payload_type (sdp_t *sdp_p, uint16_t level,
+                                    uint16_t inst_num, uint16_t payload_num,
+                                    sdp_payload_ind_e *indicator)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cap_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_X_CAP, inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-cap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        cap_p = attr_p->attr.cap_p;
+        if ((payload_num < 1) ||
+            (payload_num > cap_p->num_payloads)) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s X-cap attribute, level %u instance %u, "
+                          "payload num %u invalid.", sdp_p->debug_str,
+                          (unsigned)level, (unsigned)inst_num, (unsigned)payload_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return (0);
+        } else {
+            *indicator = cap_p->payload_indicator[payload_num-1];
+            return (cap_p->payload_type[payload_num-1]);
+        }
+    }
+}
+
+
+/* Function:    sdp_attr_add_xcap_payload_type
+ * Description: Add a new payload type for the X-cap attribute line
+ *              specified. The new payload type will be added at the end
+ *              of the payload type list.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ *              payload_type The new payload type.
+ * Returns:     SDP_SUCCESS or SDP_INVALID_PARAMETER
+ */
+sdp_result_e sdp_attr_add_xcap_payload_type(sdp_t *sdp_p, uint16_t level,
+                                            uint16_t inst_num, uint16_t payload_type,
+                                            sdp_payload_ind_e indicator)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cap_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_X_CAP, inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-cap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    cap_p = attr_p->attr.cap_p;
+    cap_p->payload_indicator[cap_p->num_payloads] = indicator;
+    cap_p->payload_type[cap_p->num_payloads++] = payload_type;
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_get_cdsc_first_cap_num
+ * Description: Gets the first capability number valid for the specified
+ *              CDSC attribute instance.  If the capability is not
+ *              defined, zero is returned.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the capability.
+ *              inst_num    The CDSC instance number to check.
+ * Returns:     Capability number or zero.
+ */
+uint16_t sdp_attr_get_cdsc_first_cap_num(sdp_t *sdp_p, uint16_t level, uint16_t inst_num)
+{
+    uint16_t          cap_num=1;
+    uint16_t          attr_count=0;
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *mca_p;
+
+    if (level == SDP_SESSION_LEVEL) {
+        for (attr_p = sdp_p->sess_attrs_p; attr_p != NULL;
+             attr_p = attr_p->next_p) {
+            if (attr_p->type == SDP_ATTR_CDSC) {
+                attr_count++;
+                if (attr_count == inst_num) {
+                    return (cap_num);
+                } else {
+                    cap_num += attr_p->attr.cap_p->num_payloads;
+                }
+            }
+        }
+    } else {  /* Capability is at a media level */
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            sdp_p->conf_p->num_invalid_param++;
+            return (0);
+        }
+        for (attr_p = mca_p->media_attrs_p; attr_p != NULL;
+             attr_p = attr_p->next_p) {
+            if (attr_p->type == SDP_ATTR_CDSC) {
+                attr_count++;
+                if (attr_count == inst_num) {
+                    return (cap_num);
+                } else {
+                    cap_num += attr_p->attr.cap_p->num_payloads;
+                }
+            }
+        }
+    }  /* Attr is at a media level */
+
+    if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+        SDPLogError(logTag, "%s CDSC attribute, level %u instance %u "
+                  "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+    }
+    sdp_p->conf_p->num_invalid_param++;
+    return (0);
+}
+
+/* Function:    sdp_attr_get_cdsc_media_type
+ * Description: Returns the media type specified for the given CDSC
+ *              attribute.  If the given attribute is not defined,
+ *              SDP_MEDIA_INVALID is returned.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Media type or SDP_MEDIA_INVALID.
+ */
+sdp_media_e sdp_attr_get_cdsc_media_type(sdp_t *sdp_p, uint16_t level,
+                                         uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cdsc_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_CDSC, inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s CDSC attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_MEDIA_INVALID);
+    } else {
+        cdsc_p = attr_p->attr.cap_p;
+        return (cdsc_p->media);
+    }
+}
+
+/* Function:    sdp_attr_get_cdsc_transport_type
+ * Description: Returns the transport type specified for the given CDSC
+ *              attribute.  If the given attribute is not defined,
+ *              SDP_TRANSPORT_INVALID is returned.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Media type or SDP_TRANSPORT_INVALID.
+ */
+sdp_transport_e sdp_attr_get_cdsc_transport_type(sdp_t *sdp_p, uint16_t level,
+                                                 uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cdsc_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_CDSC,
+                           inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s CDSC attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_TRANSPORT_INVALID);
+    } else {
+        cdsc_p = attr_p->attr.cap_p;
+        return (cdsc_p->transport);
+    }
+}
+
+/* Function:    sdp_attr_get_cdsc_num_payload_types
+ * Description: Returns the number of payload types associated with the
+ *              specified CDSC attribute.  If the attribute is invalid,
+ *              zero will be returned.  Application must validate the
+ *              attribute line before using this routine.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Number of payload types or zero.
+ */
+uint16_t sdp_attr_get_cdsc_num_payload_types (sdp_t *sdp_p, uint16_t level,
+                                         uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cdsc_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_CDSC, inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s CDSC attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        cdsc_p = attr_p->attr.cap_p;
+        return (cdsc_p->num_payloads);
+    }
+}
+
+/* Function:    sdp_attr_get_cdsc_payload_type
+ * Description: Returns the payload type of the specified payload for the
+ *              CDSC attribute line.  If the attr line or payload number is
+ *              invalid, zero will be returned.  Application must validate
+ *              the CDSC attr before using this routine.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ *              payload_num The payload number to retrieve.  Range is
+ *                          (1 - max num payloads).
+ * Returns:     Payload type or zero.
+ */
+uint16_t sdp_attr_get_cdsc_payload_type (sdp_t *sdp_p, uint16_t level,
+                                    uint16_t inst_num, uint16_t payload_num,
+                                    sdp_payload_ind_e *indicator)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cdsc_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_CDSC, inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s CDSC attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        cdsc_p = attr_p->attr.cap_p;
+        if ((payload_num < 1) ||
+            (payload_num > cdsc_p->num_payloads)) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s CDSC attribute, level %u instance %u, "
+                          "payload num %u invalid.", sdp_p->debug_str,
+                          (unsigned)level, (unsigned)inst_num, (unsigned)payload_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return (0);
+        } else {
+            *indicator = cdsc_p->payload_indicator[payload_num-1];
+            return (cdsc_p->payload_type[payload_num-1]);
+        }
+    }
+}
+
+/* Function:    sdp_attr_add_cdsc_payload_type
+ * Description: Add a new payload type for the CDSC attribute line
+ *              specified. The new payload type will be added at the end
+ *              of the payload type list.
+ *              Note: cap_num is not specified.  It must be zero.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ *              payload_type The new payload type.
+ * Returns:     SDP_SUCCESS or SDP_INVALID_PARAMETER
+ */
+sdp_result_e sdp_attr_add_cdsc_payload_type (sdp_t *sdp_p, uint16_t level,
+                                             uint16_t inst_num, uint16_t payload_type,
+                                             sdp_payload_ind_e indicator)
+{
+    sdp_attr_t  *attr_p;
+    sdp_mca_t   *cdsc_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_CDSC, inst_num);
+    if ((attr_p == NULL) || (attr_p->attr.cap_p == NULL)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s CDSC attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    cdsc_p = attr_p->attr.cap_p;
+    cdsc_p->payload_indicator[cdsc_p->num_payloads] = indicator;
+    cdsc_p->payload_type[cdsc_p->num_payloads++] = payload_type;
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_media_dynamic_payload_valid
+ * Description: Checks if the dynamic payload type passed in is defined
+ *              on the media line m_line
+ * Parameters:  sdp_p      The SDP handle returned by sdp_init_description.
+ *              payload_type  Payload type to be checked
+ *
+ * Returns:     TRUE or FALSE. Returns TRUE if payload type is defined on the
+ *              media line, else returns FALSE
+ */
+
+tinybool sdp_media_dynamic_payload_valid (sdp_t *sdp_p, uint16_t payload_type,
+                                          uint16_t m_line)
+{
+   uint16_t p_type,m_ptype;
+   ushort num_payload_types;
+   sdp_payload_ind_e ind;
+   tinybool payload_matches = FALSE;
+   tinybool result = TRUE;
+
+   if ((payload_type < SDP_MIN_DYNAMIC_PAYLOAD) ||
+       (payload_type > SDP_MAX_DYNAMIC_PAYLOAD)) {
+       return FALSE;
+   }
+
+   num_payload_types =
+       sdp_get_media_num_payload_types(sdp_p, m_line);
+
+   for(p_type=1; p_type <=num_payload_types;p_type++){
+
+       m_ptype = (uint16_t)sdp_get_media_payload_type(sdp_p,
+                                            m_line, p_type, &ind);
+       if (payload_type == m_ptype) {
+           payload_matches = TRUE;
+           break;
+       }
+
+   }
+
+   if (!payload_matches) {
+       return FALSE;
+   }
+
+   return (result);
+
+}
+
+/* Function:    sdp_attr_get_rtr_confirm
+ * Description: Returns the value of the rtr attribute confirm
+ *              parameter specified for the given attribute.  Returns TRUE if
+ *              the confirm parameter is specified.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Boolean value.
+ */
+tinybool sdp_attr_get_rtr_confirm (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_RTR, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s %s attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str,
+                      sdp_get_attr_name(SDP_ATTR_RTR), (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.rtr.confirm);
+    }
+}
+
+
+
+sdp_mediadir_role_e sdp_attr_get_comediadir_role (sdp_t *sdp_p, uint16_t level,
+                                             uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_DIRECTION, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Comediadir role attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_MEDIADIR_ROLE_UNKNOWN);
+    } else {
+        return (attr_p->attr.comediadir.role);
+    }
+}
+
+/* Function:    sdp_attr_get_silencesupp_enabled
+ * Description: Returns the value of the silencesupp attribute enable
+ *              parameter specified for the given attribute.  Returns TRUE if
+ *              the confirm parameter is specified.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Boolean value.
+ */
+tinybool sdp_attr_get_silencesupp_enabled (sdp_t *sdp_p, uint16_t level,
+                                           uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SILENCESUPP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s silenceSuppEnable attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (FALSE);
+    } else {
+        return (attr_p->attr.silencesupp.enabled);
+    }
+}
+
+/* Function:    sdp_attr_get_silencesupp_timer
+ * Description: Returns the value of the silencesupp attribute timer
+ *              parameter specified for the given attribute.  null_ind
+ *              is set to TRUE if no value was specified, but instead the
+ *              null "-" value was specified.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     16-bit timer value
+ *              boolean null_ind
+ */
+uint16_t sdp_attr_get_silencesupp_timer (sdp_t *sdp_p, uint16_t level,
+                                    uint8_t cap_num, uint16_t inst_num,
+                                    tinybool *null_ind)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SILENCESUPP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s silenceTimer attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        *null_ind = attr_p->attr.silencesupp.timer_null;
+        return (attr_p->attr.silencesupp.timer);
+    }
+}
+
+/* Function:    sdp_attr_get_silencesupp_pref
+ * Description: Sets the silencesupp supppref value
+ *              If this parameter is TRUE, the confirm parameter will be
+ *              specified when the SDP description is built.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              confirm     New qos confirm parameter.
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_silencesupp_pref_e sdp_attr_get_silencesupp_pref (sdp_t *sdp_p,
+                                                      uint16_t level, uint8_t cap_num,
+                                                      uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SILENCESUPP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s silence suppPref attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_SILENCESUPP_PREF_UNKNOWN);
+    } else {
+        return (attr_p->attr.silencesupp.pref);
+    }
+}
+
+/* Function:    sdp_attr_get_silencesupp_siduse
+ * Description: Returns the value of the silencesupp attribute siduse
+ *              parameter specified for the given attribute.  If the given
+ *              attribute is not defined, SDP_QOS_STRENGTH_UNKNOWN is
+ *              returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     silencesupp siduse enum.
+ */
+sdp_silencesupp_siduse_e sdp_attr_get_silencesupp_siduse (sdp_t *sdp_p,
+                                                          uint16_t level,
+                                                          uint8_t cap_num,
+                                                          uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SILENCESUPP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s silence sidUse attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_SILENCESUPP_SIDUSE_UNKNOWN);
+    } else {
+        return (attr_p->attr.silencesupp.siduse);
+    }
+}
+
+/* Function:    sdp_attr_get_silencesupp_fxnslevel
+ * Description: Returns the value of the silencesupp attribute fxns
+ *              (fixed noise) parameter specified for the given attribute.
+ *              null_ind is set to TRUE if no value was specified,
+ *              but instead the null "-" value was specified.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     7-bit fxns value
+ *              boolean null_ind
+ */
+uint8_t sdp_attr_get_silencesupp_fxnslevel (sdp_t *sdp_p, uint16_t level,
+                                       uint8_t cap_num, uint16_t inst_num,
+                                       tinybool *null_ind)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SILENCESUPP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s silence fxnslevel attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        *null_ind = attr_p->attr.silencesupp.fxnslevel_null;
+        return (attr_p->attr.silencesupp.fxnslevel);
+    }
+}
+
+/* Function:    sdp_attr_get_mptime_num_intervals
+ * Description: Returns the number of intervals specified for the
+ *              given mptime attribute.  If the given attribute is not
+ *              defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Number of intervals.
+ */
+uint16_t sdp_attr_get_mptime_num_intervals (
+    sdp_t *sdp_p,
+    uint16_t level,
+    uint8_t cap_num,
+    uint16_t inst_num) {
+
+    sdp_attr_t *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_MPTIME, inst_num);
+    if (attr_p != NULL) {
+        return attr_p->attr.mptime.num_intervals;
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+        SDPLogError(logTag, "%s mptime attribute, level %u instance %u not found.",
+                  sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+    }
+    sdp_p->conf_p->num_invalid_param++;
+    return 0;
+}
+
+/* Function:    sdp_attr_get_mptime_interval
+ * Description: Returns the value of the specified interval for the
+ *              given mptime attribute.  If the given attribute is not
+ *              defined, zero is returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              interval_num The interval number to get.  Range is (1 -
+ *                          max num payloads).
+ * Returns:     Interval.
+ */
+uint16_t sdp_attr_get_mptime_interval (
+    sdp_t *sdp_p,
+    uint16_t level,
+    uint8_t cap_num,
+    uint16_t inst_num,
+    uint16_t interval_num) {
+
+    sdp_attr_t *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_MPTIME, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s mptime attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return 0;
+    }
+
+    if ((interval_num<1) || (interval_num>attr_p->attr.mptime.num_intervals)) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s mptime attribute, level %u instance %u, "
+                      "invalid interval number %u requested.",
+                      sdp_p->debug_str, (unsigned)level, (unsigned)inst_num, (unsigned)interval_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return 0;
+    }
+
+    return attr_p->attr.mptime.intervals[interval_num-1];
+}
+
+/* Function:    sdp_attr_add_mptime_interval
+ * Description: Add a new value to the list of intervals specified for
+ *              the given mptime attribute.  The interval will be
+ *              added to the end of the list so these values should be added
+ *              in the order they will be displayed within the attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              mp_interval The interval to add.
+ * Returns:     SDP_SUCCESS            Interval was added successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ *              SDP_INVALID_SDP_PTR    Supplied SDP pointer is invalid
+ */
+sdp_result_e sdp_attr_add_mptime_interval (
+    sdp_t *sdp_p,
+    uint16_t level,
+    uint8_t cap_num,
+    uint16_t inst_num,
+    uint16_t mp_interval) {
+
+    uint16_t interval_num;
+    sdp_attr_t *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num, SDP_ATTR_MPTIME, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s mptime attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return SDP_INVALID_PARAMETER;
+    }
+
+    interval_num = attr_p->attr.mptime.num_intervals;
+    if (interval_num>=SDP_MAX_PAYLOAD_TYPES) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s mptime attribute, level %u instance %u "
+                      "exceeds maximum length.",
+                      sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return SDP_INVALID_PARAMETER;
+    }
+
+    attr_p->attr.mptime.intervals[interval_num] = mp_interval;
+    ++attr_p->attr.mptime.num_intervals;
+    return SDP_SUCCESS;
+}
+
+
+
+/* Function:    sdp_get_group_attr
+ * Description: Returns the attribute parameter from the a=group:<>
+ *              line.  If no attrib has been set ,
+ *              SDP_GROUP_ATTR_UNSUPPORTED will be returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       SDP_SESSION_LEVEL
+ * Returns:     Valid attrib value or SDP_GROUP_ATTR_UNSUPPORTED.
+ */
+sdp_group_attr_e sdp_get_group_attr (sdp_t *sdp_p, uint16_t level,
+                                     uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t          *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_GROUP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Group (a= group line) attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_GROUP_ATTR_UNSUPPORTED);
+    } else {
+       if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+           SDP_PRINT("%s Stream data group attr field is :%s ",
+                     sdp_p->debug_str,
+                     sdp_get_group_attr_name(attr_p->attr.stream_data.group_attr) );
+        }
+        return (attr_p->attr.stream_data.group_attr);
+    }
+}
+
+/* Function:    sdp_get_group_num_id
+ * Description: Returns the number of ids from the a=group:<>  line.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       SDP_SESSION_LEVEL
+ * Returns:    Num of group ids present or 0 if there is an error.
+ */
+uint16_t sdp_get_group_num_id (sdp_t *sdp_p, uint16_t level,
+                          uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t          *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_GROUP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s a=group level attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (0);
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+            SDP_PRINT("%s Stream data group attr - num of ids is :%u ",
+                      sdp_p->debug_str,
+                      (unsigned)attr_p->attr.stream_data.num_group_id);
+        }
+    }
+    return (attr_p->attr.stream_data.num_group_id);
+}
+
+/* Function:    sdp_get_group_id
+ * Description: Returns the group id from the a=group:<>  line.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       SDP_SESSION_LEVEL
+ *              id_num      Number of the id to retrieve. The range is (1 -
+ *                          SDP_MAX_GROUP_STREAM_ID)
+ * Returns:    Value of the group id at the index specified or
+ *             NULL if an error
+ */
+const char* sdp_get_group_id (sdp_t *sdp_p, uint16_t level,
+                        uint8_t cap_num, uint16_t inst_num, uint16_t id_num)
+{
+    sdp_attr_t          *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_GROUP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s a=group level attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+            SDP_PRINT("%s Stream data group attr - num of ids is :%u ",
+                      sdp_p->debug_str,
+                      (unsigned)attr_p->attr.stream_data.num_group_id);
+        }
+        if ((id_num < 1) || (id_num > attr_p->attr.stream_data.num_group_id)) {
+            return (NULL);
+        }
+    }
+    return (attr_p->attr.stream_data.group_ids[id_num-1]);
+}
+
+/* Function:    sdp_attr_get_x_sidin
+ * Description: Returns the attribute parameter from the a=X-sidin:<>
+ *              line.  If no attrib has been set NULL will be returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       media level index
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Pointer to sidin or NULL.
+ */
+const char* sdp_attr_get_x_sidin (sdp_t *sdp_p, uint16_t level,
+                                     uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t          *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_X_SIDIN, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-sidin attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+            SDP_PRINT("%s Stream X-sidin attr field is :%s ",
+                      sdp_p->debug_str,
+                      attr_p->attr.stream_data.x_sidin);
+        }
+        return (attr_p->attr.stream_data.x_sidin);
+    }
+}
+
+/* Function:    sdp_attr_get_x_sidout
+ * Description: Returns the attribute parameter from the a=X-sidout:<>
+ *              line.  If no attrib has been set NULL will be returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       media level index
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Pointer to sidout or NULL.
+ */
+const char* sdp_attr_get_x_sidout (sdp_t *sdp_p, uint16_t level,
+                                     uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t          *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_X_SIDOUT, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-sidout attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+            SDP_PRINT("%s Stream X-sidout attr field is :%s ",
+                      sdp_p->debug_str,
+                      attr_p->attr.stream_data.x_sidout);
+        }
+        return (attr_p->attr.stream_data.x_sidout);
+    }
+}
+
+/* Function:    sdp_attr_get_x_confid
+ * Description: Returns the attribute parameter from the a=X-confid:<>
+ *              line.  If no attrib has been set NULL will be returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       media level index
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Pointer to confid or NULL.
+ */
+const char* sdp_attr_get_x_confid (sdp_t *sdp_p, uint16_t level,
+                                     uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t          *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_X_CONFID, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s X-confid attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+            SDP_PRINT("%s Stream X-confid attr field is :%s ",
+                      sdp_p->debug_str,
+                      attr_p->attr.stream_data.x_confid);
+        }
+        return (attr_p->attr.stream_data.x_confid);
+    }
+}
+
+/* Function:    sdp_get_source_filter_mode
+ * Description: Gets the filter mode in internal representation
+ * Parameters:  sdp_p   The SDP handle which contains the attributes
+ *              level     SDP_SESSION_LEVEL/m-line number
+ *              inst_num  The attribute instance number
+ * Returns:     Filter mode (incl/excl/not present)
+ */
+sdp_src_filter_mode_e
+sdp_get_source_filter_mode (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                            uint16_t inst_num)
+{
+    sdp_attr_t *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SOURCE_FILTER, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Source filter attribute, level %u, "
+                      "instance %u not found", sdp_p->debug_str,
+                      (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_FILTER_MODE_NOT_PRESENT);
+    }
+    return (attr_p->attr.source_filter.mode);
+}
+
+/* Function:    sdp_get_filter_destination_attributes
+ * Description: Gets the destination address parameters
+ * Parameters:  Network type (optional), destination address type
+ *              (optional), and destination address (mandatory) variables
+ *              which gets updated.
+ * Returns:     SDP_SUCCESS or SDP_INVALID_PARAMETER/SDP_INVALID_SDP_PTR
+ */
+sdp_result_e
+sdp_get_filter_destination_attributes (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                                       uint16_t inst_num, sdp_nettype_e *nettype,
+                                       sdp_addrtype_e *addrtype,
+                                       char *dest_addr)
+{
+    sdp_attr_t *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SOURCE_FILTER, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Source filter attribute, level %u instance %u "
+                      "not found", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    if (nettype) {
+        *nettype = attr_p->attr.source_filter.nettype;
+    }
+    if (addrtype) {
+        *addrtype = attr_p->attr.source_filter.addrtype;
+    }
+    sstrncpy(dest_addr, attr_p->attr.source_filter.dest_addr,
+             SDP_MAX_STRING_LEN+1);
+
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_get_filter_source_address_count
+ * Description: Gets the number of source addresses in the list
+ * Parameters:  sdp_p   The SDP handle which contains the attributes
+ *              level     SDP_SESSION_LEVEL/m-line number
+ *              inst_num  The attribute instance number
+ * Returns:     Source-list count
+ */
+
+int32_t
+sdp_get_filter_source_address_count (sdp_t *sdp_p, uint16_t level,
+                                     uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SOURCE_FILTER, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Source filter attribute, level %u instance %u "
+                      "not found", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_VALUE);
+    }
+    return (attr_p->attr.source_filter.num_src_addr);
+}
+
+/* Function:    sdp_get_filter_source_address
+ * Description: Gets one of the source address that is indexed by the user
+ * Parameters:  sdp_p   The SDP handle which contains the attributes
+ *              level     SDP_SESSION_LEVEL/m-line number
+ *              inst_num  The attribute instance number
+ *              src_addr_id User provided index (value in range between
+ *                          0 to (SDP_MAX_SRC_ADDR_LIST-1) which obtains
+ *                          the source addr corresponding to it.
+ *              src_addr  The user provided variable which gets updated
+ *                        with source address corresponding to the index
+ */
+sdp_result_e
+sdp_get_filter_source_address (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                               uint16_t inst_num, uint16_t src_addr_id,
+                               char *src_addr)
+{
+    sdp_attr_t *attr_p;
+
+    src_addr[0] = '\0';
+
+    if (src_addr_id >= SDP_MAX_SRC_ADDR_LIST) {
+        return (SDP_INVALID_PARAMETER);
+    }
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SOURCE_FILTER, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s Source filter attribute, level %u instance %u "
+                      "not found", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    if (src_addr_id >= attr_p->attr.source_filter.num_src_addr) {
+        return (SDP_INVALID_PARAMETER);
+    }
+    sstrncpy(src_addr, attr_p->attr.source_filter.src_list[src_addr_id],
+             SDP_MAX_STRING_LEN+1);
+
+    return (SDP_SUCCESS);
+}
+
+sdp_rtcp_unicast_mode_e
+sdp_get_rtcp_unicast_mode(sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
+                          uint16_t inst_num)
+{
+    sdp_attr_t *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_RTCP_UNICAST, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s RTCP Unicast attribute, level %u, "
+                      "instance %u not found", sdp_p->debug_str,
+                      (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_RTCP_UNICAST_MODE_NOT_PRESENT);
+    }
+    return ((sdp_rtcp_unicast_mode_e)attr_p->attr.u32_val);
+}
+
+
+/* Function:    sdp_attr_get_sdescriptions_tag
+ * Description: Returns the value of the sdescriptions tag
+ *              parameter specified for the given attribute.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Tag value or SDP_INVALID_VALUE (-2) if error encountered.
+ */
+
+int32_t
+sdp_attr_get_sdescriptions_tag (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SDESCRIPTIONS, inst_num);
+
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s srtp attribute tag, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return SDP_INVALID_VALUE;
+    } else {
+        return attr_p->attr.srtp_context.tag;
+    }
+}
+
+/* Function:    sdp_attr_get_sdescriptions_crypto_suite
+ * Description: Returns the value of the sdescriptions crypto suite
+ *              parameter specified for the given attribute. Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return the suite. If it's not,
+ *              try to find the version 9. This assumes you cannot have both
+ *              versions in the same SDP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     SDP_SRTP_UNKNOWN_CRYPTO_SUITE is returned if an error was
+ *              encountered otherwise the crypto suite is returned.
+ */
+
+sdp_srtp_crypto_suite_t
+sdp_attr_get_sdescriptions_crypto_suite (sdp_t *sdp_p, uint16_t level,
+                                         uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+
+    /* Try version 2 first */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* There's no version 2 so now try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                               SDP_ATTR_SDESCRIPTIONS, inst_num);
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute suite, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return SDP_SRTP_UNKNOWN_CRYPTO_SUITE;
+        }
+    }
+
+    return attr_p->attr.srtp_context.suite;
+
+}
+
+/* Function:    sdp_attr_get_sdescriptions_key
+ * Description: Returns the value of the sdescriptions master key
+ *              parameter specified for the given attribute. Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return the key. If it's not,
+ *              try to find the version 9. This assumes you cannot have both
+ *              versions in the same SDP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     NULL if error encountered or master key salt string
+ */
+
+const char*
+sdp_attr_get_sdescriptions_key (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    /* Try version 2 first */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* Couldn't find version 2 now try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                               SDP_ATTR_SDESCRIPTIONS, inst_num);
+
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute key, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return NULL;
+        }
+    }
+
+    return (char*)attr_p->attr.srtp_context.master_key;
+}
+
+
+/* Function:    sdp_attr_get_sdescriptions_salt
+ * Description: Returns the value of the sdescriptions master salt
+ *              parameter specified for the given attribute. Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return the salt. If it's not,
+ *              try to find the version 9. This assumes you cannot have both
+ *              versions in the same SDP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     NULL if error encountered or master key salt string
+ */
+
+const char*
+sdp_attr_get_sdescriptions_salt (sdp_t *sdp_p, uint16_t level,
+                                 uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    /* Try version 2 first */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* Couldn't find version 2 now try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                               SDP_ATTR_SDESCRIPTIONS, inst_num);
+
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute salt, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return NULL;
+        }
+    }
+
+    return (char*) attr_p->attr.srtp_context.master_salt;
+
+}
+
+
+
+/* Function:    sdp_attr_get_sdescriptions_lifetime
+ * Description: Returns the value of the sdescriptions lifetime
+ *              parameter specified for the given attribute.Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return the lifetime. If it's
+ *              not, try to find the version 9. This assumes you cannot have
+ *              both versions in the same SDP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     NULL if error encountered or lifetime string
+ */
+
+const char*
+sdp_attr_get_sdescriptions_lifetime (sdp_t *sdp_p, uint16_t level,
+                                     uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    /* Try version 2 first. */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* Couldn't find version 2 now try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                               SDP_ATTR_SDESCRIPTIONS, inst_num);
+
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute lifetime, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return NULL;
+        }
+    }
+
+    return (char*)attr_p->attr.srtp_context.master_key_lifetime;
+
+}
+
+/* Function:    sdp_attr_get_sdescriptions_mki
+ * Description: Returns the value of the sdescriptions MKI value and length
+ *              parameter of the specified attribute instance. Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return the MKI. If it's
+ *              not, try to find version 9. This assumes you cannot have
+ *              both versions in the same SDP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ *              mki_value   application provided pointer that on exit
+ *                          is set to the MKI value string if one exists.
+ *              mki_length application provided pointer that on exit
+ *                         is set to the MKI length if one exists.
+ * Returns:     SDP_SUCCESS no errors encountered otherwise sdp error
+ *              based upon the specific error.
+ */
+
+sdp_result_e
+sdp_attr_get_sdescriptions_mki (sdp_t *sdp_p, uint16_t level,
+                                uint8_t cap_num, uint16_t inst_num,
+                                const char **mki_value,
+                                uint16_t *mki_length)
+{
+    sdp_attr_t  *attr_p;
+
+    *mki_value = NULL;
+    *mki_length = 0;
+
+    /* Try version 2 first */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* Couldn't find version 2 now try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                               SDP_ATTR_SDESCRIPTIONS, inst_num);
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute MKI, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return SDP_INVALID_PARAMETER;
+        }
+    }
+
+    *mki_value = (char*)attr_p->attr.srtp_context.mki;
+    *mki_length = attr_p->attr.srtp_context.mki_size_bytes;
+    return SDP_SUCCESS;
+
+}
+
+
+/* Function:    sdp_attr_get_sdescriptions_session_params
+ * Description: Returns the unparsed session parameters string. Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return session parameters. If
+ *              it's not, try to find version 9. This assumes you cannot have
+ *              both versions in the same SDP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     NULL if no session parameters were received in the sdp,
+ *              otherwise returns a pointer to the start of the session
+ *              parameters string. Note that the calling function should
+ *              not free the returned pointer.
+ */
+
+const char*
+sdp_attr_get_sdescriptions_session_params (sdp_t *sdp_p, uint16_t level,
+                                           uint8_t cap_num, uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    /* Try version 2 first */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* Couldn't find version 2 try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SDESCRIPTIONS, inst_num);
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute session params, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return NULL;
+        }
+    }
+
+    return attr_p->attr.srtp_context.session_parameters;
+}
+
+
+/* Function:    sdp_attr_get_sdescriptions_key_size
+ * Description: Returns the master key size. Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return key size. If
+ *              it's not, try to find version 9. This assumes you cannot have
+ *              both versions in the same SDP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     0 (SDP_SDESCRIPTIONS_KEY_SIZE_UNKNOWN) if error was
+ *              encountered, otherwise key size.
+ */
+
+unsigned char
+sdp_attr_get_sdescriptions_key_size (sdp_t *sdp_p,
+                                     uint16_t level,
+                                     uint8_t cap_num,
+                                     uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    /* Try version 2 first */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* Couldn't find version 2 now try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                               SDP_ATTR_SDESCRIPTIONS, inst_num);
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute MKI, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return SDP_SDESCRIPTIONS_KEY_SIZE_UNKNOWN;
+        }
+    }
+
+    return attr_p->attr.srtp_context.master_key_size_bytes;
+
+}
+
+
+/* Function:    sdp_attr_get_sdescriptions_salt_size
+ * Description: Returns the salt key size. Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return salt size. If
+ *              it's not, try to find version 9. This assumes you cannot have
+ *              both versions in the same SDP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     0 (SDP_SDESCRIPTIONS_KEY_SIZE_UNKNOWN) if error was
+ *              encountered, otherwise salt size.
+ */
+
+unsigned char
+sdp_attr_get_sdescriptions_salt_size (sdp_t *sdp_p,
+                                      uint16_t level,
+                                      uint8_t cap_num,
+                                      uint16_t inst_num)
+{
+
+    sdp_attr_t  *attr_p;
+
+    /* Try version 2 first */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* Couldn't find version 2 now try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                               SDP_ATTR_SDESCRIPTIONS, inst_num);
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute MKI, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return SDP_SDESCRIPTIONS_KEY_SIZE_UNKNOWN;
+        }
+    }
+
+    return attr_p->attr.srtp_context.master_salt_size_bytes;
+
+}
+
+
+/* Function:    sdp_attr_get_srtp_crypto_selection_flags
+ * Description: Returns the selection flags. Note that
+ *              this is a common api for both version 2 and version 9
+ *              sdescriptions. It has no knowledge which version is being
+ *              used so it will first try to find if a version 2 sdescriptions
+ *              attribute is present. If it is, return selection flags. If
+ *              it's not, try to find version 9. This assumes you cannot have
+ *              both versions in the same SDP.
+ *              Currently only necessary for MGCP.
+ *
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              cap_num     The capability number associated with the
+ *                          attribute if any.  If none, should be zero.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     0 (SDP_SRTP_CRYPTO_SELECTION_FLAGS_UNKNOWN) if error was
+ *              encountered, otherwise selection flags.
+ */
+
+unsigned long
+sdp_attr_get_srtp_crypto_selection_flags (sdp_t *sdp_p,
+                                          uint16_t level,
+                                          uint8_t cap_num,
+                                          uint16_t inst_num)
+{
+
+
+    sdp_attr_t  *attr_p;
+
+    /* Try version 2 first */
+    attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                           SDP_ATTR_SRTP_CONTEXT, inst_num);
+
+    if (attr_p == NULL) {
+        /* Couldn't find version 2 now try version 9 */
+        attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                               SDP_ATTR_SDESCRIPTIONS, inst_num);
+        if (attr_p == NULL) {
+            if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+                SDPLogError(logTag, "%s srtp attribute MKI, level %u instance %u "
+                          "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+            }
+            sdp_p->conf_p->num_invalid_param++;
+            return SDP_SRTP_CRYPTO_SELECTION_FLAGS_UNKNOWN;
+        }
+    }
+
+    return attr_p->attr.srtp_context.selection_flags;
+
+}
+
+
+
+/* Function:    sdp_find_rtcp_fb_attr
+ * Description: Helper to find the nth instance of a rtcp-fb attribute of
+ *              the specified feedback type.
+ * Parameters:  sdp_p        The SDP handle returned by sdp_init_description.
+ *              level        The level to check for the attribute.
+ *              payload_type The payload to get the attribute for
+ *              fb_type      The feedback type to look for.
+ *              inst_num     The attribute instance number to check.
+ * Returns:     Pointer to the attribute, or NULL if not found.
+ */
+
+sdp_attr_t *
+sdp_find_rtcp_fb_attr (sdp_t *sdp_p,
+                       uint16_t level,
+                       uint16_t payload_type,
+                       sdp_rtcp_fb_type_e fb_type,
+                       uint16_t inst_num)
+{
+    uint16_t          attr_count=0;
+    sdp_mca_t   *mca_p;
+    sdp_attr_t  *attr_p;
+
+    mca_p = sdp_find_media_level(sdp_p, level);
+    if (!mca_p) {
+        return (NULL);
+    }
+    for (attr_p = mca_p->media_attrs_p; attr_p; attr_p = attr_p->next_p) {
+        if (attr_p->type == SDP_ATTR_RTCP_FB &&
+            (attr_p->attr.rtcp_fb.payload_num == payload_type ||
+             attr_p->attr.rtcp_fb.payload_num == SDP_ALL_PAYLOADS) &&
+            attr_p->attr.rtcp_fb.feedback_type == fb_type) {
+            attr_count++;
+            if (attr_count == inst_num) {
+                return (attr_p);
+            }
+        }
+    }
+    return NULL;
+}
+
+/* Function:    sdp_attr_get_rtcp_fb_ack
+ * Description: Returns the value of the rtcp-fb:...ack attribute
+ * Parameters:  sdp_p      The SDP handle returned by sdp_init_description.
+ *              level        The level to check for the attribute.
+ *              payload_type The payload to get the attribute for
+ *              inst_num    The attribute instance number to check.
+ * Returns:     ACK type (SDP_RTCP_FB_ACK_NOT_FOUND if not present)
+ */
+sdp_rtcp_fb_ack_type_e
+sdp_attr_get_rtcp_fb_ack(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_rtcp_fb_attr(sdp_p, level, payload_type,
+                                   SDP_RTCP_FB_ACK, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp-fb attribute, level %u, pt %u, "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)payload_type, (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return SDP_RTCP_FB_ACK_NOT_FOUND;
+    }
+    return (attr_p->attr.rtcp_fb.param.ack);
+}
+
+/* Function:    sdp_attr_get_rtcp_fb_nack
+ * Description: Returns the value of the rtcp-fb:...nack attribute
+ * Parameters:  sdp_p      The SDP handle returned by sdp_init_description.
+ *              level        The level to check for the attribute.
+ *              payload_type The payload to get the attribute for
+ *              inst_num    The attribute instance number to check.
+ * Returns:     NACK type (SDP_RTCP_FB_NACK_NOT_FOUND if not present)
+ */
+sdp_rtcp_fb_nack_type_e
+sdp_attr_get_rtcp_fb_nack(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_rtcp_fb_attr(sdp_p, level, payload_type,
+                                   SDP_RTCP_FB_NACK, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp-fb attribute, level %u, pt %u, "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)payload_type, (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return SDP_RTCP_FB_NACK_NOT_FOUND;
+    }
+    return (attr_p->attr.rtcp_fb.param.nack);
+}
+
+/* Function:    sdp_attr_get_rtcp_fb_trr_int
+ * Description: Returns the value of the rtcp-fb:...trr-int attribute
+ * Parameters:  sdp_p      The SDP handle returned by sdp_init_description.
+ *              level        The level to check for the attribute.
+ *              payload_type The payload to get the attribute for
+ *              inst_num    The attribute instance number to check.
+ * Returns:     trr-int interval (0xFFFFFFFF if not found)
+ */
+uint32_t
+sdp_attr_get_rtcp_fb_trr_int(sdp_t *sdp_p, uint16_t level,
+                             uint16_t payload_type, uint16_t inst)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_rtcp_fb_attr(sdp_p, level, payload_type,
+                                   SDP_RTCP_FB_TRR_INT, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp-fb attribute, level %u, pt %u, "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)payload_type, (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return 0xFFFFFFFF;
+    }
+    return (attr_p->attr.rtcp_fb.param.trr_int);
+}
+
+/* Function:    sdp_attr_get_rtcp_fb_remb_enabled
+ * Description: Returns true if rtcp-fb:...goog-remb attribute exists
+ * Parameters:  sdp_p      The SDP handle returned by sdp_init_description.
+ *              level        The level to check for the attribute.
+ *              payload_type The payload to get the attribute for
+ * Returns:     true if rtcp-fb:...goog-remb exists
+ */
+tinybool
+sdp_attr_get_rtcp_fb_remb_enabled(sdp_t *sdp_p,
+                                  uint16_t level,
+                                  uint16_t payload_type)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_rtcp_fb_attr(sdp_p, level, payload_type,
+                                   SDP_RTCP_FB_REMB,
+                                   1); // always check for 1st instance
+    return (attr_p? TRUE : FALSE); // either exists or not
+}
+
+/* Function:    sdp_attr_get_rtcp_fb_transport_cc_enabled
+ * Description: Returns true if rtcp-fb:...transport-cc attribute exists
+ * Parameters:  sdp_p      The SDP handle returned by sdp_init_description.
+ *              level        The level to check for the attribute.
+ *              payload_type The payload to get the attribute for
+ * Returns:     true if rtcp-fb:...transport-cc exists
+ */
+tinybool
+sdp_attr_get_rtcp_fb_transport_cc_enabled(sdp_t *sdp_p,
+                                          uint16_t level,
+                                          uint16_t payload_type)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_rtcp_fb_attr(sdp_p, level, payload_type,
+                                   SDP_RTCP_FB_TRANSPORT_CC,
+                                   1); // always check for 1st instance
+    return (attr_p? TRUE : FALSE); // either exists or not
+}
+
+/* Function:    sdp_attr_get_rtcp_fb_ccm
+ * Description: Returns the value of the rtcp-fb:...ccm attribute
+ * Parameters:  sdp_p      The SDP handle returned by sdp_init_description.
+ *              level        The level to check for the attribute.
+ *              payload_type The payload to get the attribute for
+ *              inst_num    The attribute instance number to check.
+ * Returns:     CCM type (SDP_RTCP_FB_CCM_NOT_FOUND if not present)
+ */
+sdp_rtcp_fb_ccm_type_e
+sdp_attr_get_rtcp_fb_ccm(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_rtcp_fb_attr(sdp_p, level, payload_type,
+                                   SDP_RTCP_FB_CCM, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp-fb attribute, level %u, pt %u, "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)payload_type, (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return SDP_RTCP_FB_CCM_NOT_FOUND;
+    }
+    return (attr_p->attr.rtcp_fb.param.ccm);
+}
+
+/* Function:    sdp_attr_set_rtcp_fb_ack
+ * Description: Sets the value of an rtcp-fb:...ack attribute
+ * Parameters:  sdp_p        The SDP handle returned by sdp_init_description.
+ *              level          The level to set the attribute.
+ *              payload_type   The value to set the payload type to for
+ *                             this attribute. Can be SDP_ALL_PAYLOADS.
+ *              inst_num       The attribute instance number to check.
+ *              type           The ack type to indicate
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e
+sdp_attr_set_rtcp_fb_ack(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst,
+                         sdp_rtcp_fb_ack_type_e type)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_RTCP_FB, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp_fb ack attribute, level %u "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    attr_p->attr.rtcp_fb.payload_num = payload_type;
+    attr_p->attr.rtcp_fb.feedback_type = SDP_RTCP_FB_ACK;
+    attr_p->attr.rtcp_fb.param.ack = type;
+    attr_p->attr.rtcp_fb.extra[0] = '\0';
+    return (SDP_SUCCESS);
+}
+
+
+/* Function:    sdp_attr_set_rtcp_fb_nack
+ * Description: Sets the value of an rtcp-fb:...nack attribute
+ * Parameters:  sdp_p        The SDP handle returned by sdp_init_description.
+ *              level          The level to set the attribute.
+ *              payload_type   The value to set the payload type to for
+ *                             this attribute. Can be SDP_ALL_PAYLOADS.
+ *              inst_num       The attribute instance number to check.
+ *              type           The nack type to indicate
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e
+sdp_attr_set_rtcp_fb_nack(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst,
+                          sdp_rtcp_fb_nack_type_e type)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_RTCP_FB, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp_fb nack attribute, level %u "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    attr_p->attr.rtcp_fb.payload_num = payload_type;
+    attr_p->attr.rtcp_fb.feedback_type = SDP_RTCP_FB_NACK;
+    attr_p->attr.rtcp_fb.param.nack = type;
+    attr_p->attr.rtcp_fb.extra[0] = '\0';
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_set_rtcp_fb_trr_int
+ * Description: Sets the value of an rtcp-fb:...trr-int attribute
+ * Parameters:  sdp_p        The SDP handle returned by sdp_init_description.
+ *              level          The level to set the attribute.
+ *              payload_type   The value to set the payload type to for
+ *                             this attribute. Can be SDP_ALL_PAYLOADS.
+ *              inst_num       The attribute instance number to check.
+ *              interval       The interval time to indicate
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e
+sdp_attr_set_rtcp_fb_trr_int(sdp_t *sdp_p, uint16_t level, uint16_t payload_type,
+                             uint16_t inst, uint32_t interval)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_RTCP_FB, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp_fb trr-int attribute, level %u "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    attr_p->attr.rtcp_fb.payload_num = payload_type;
+    attr_p->attr.rtcp_fb.feedback_type = SDP_RTCP_FB_TRR_INT;
+    attr_p->attr.rtcp_fb.param.trr_int = interval;
+    attr_p->attr.rtcp_fb.extra[0] = '\0';
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_set_rtcp_fb_remb
+ * Description: Sets the value of an rtcp-fb:...goog-remb attribute
+ * Parameters:  sdp_p        The SDP handle returned by sdp_init_description.
+ *              level          The level to set the attribute.
+ *              payload_type   The value to set the payload type to for
+ *                             this attribute. Can be SDP_ALL_PAYLOADS.
+ *              inst_num       The attribute instance number to check.
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e
+sdp_attr_set_rtcp_fb_remb(sdp_t *sdp_p, uint16_t level, uint16_t payload_type,
+                          uint16_t inst)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_RTCP_FB, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp_fb goog-remb attribute, level %u "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    attr_p->attr.rtcp_fb.payload_num = payload_type;
+    attr_p->attr.rtcp_fb.feedback_type = SDP_RTCP_FB_REMB;
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_set_rtcp_fb_transport_cc
+ * Description: Sets the value of an rtcp-fb:...transport-cc attribute
+ * Parameters:  sdp_p        The SDP handle returned by sdp_init_description.
+ *              level          The level to set the attribute.
+ *              payload_type   The value to set the payload type to for
+ *                             this attribute. Can be SDP_ALL_PAYLOADS.
+ *              inst_num       The attribute instance number to check.
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e
+sdp_attr_set_rtcp_fb_transport_cc(sdp_t *sdp_p, uint16_t level, uint16_t payload_type,
+                                  uint16_t inst)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_RTCP_FB, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp_fb transport-cc attribute, level %u "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    attr_p->attr.rtcp_fb.payload_num = payload_type;
+    attr_p->attr.rtcp_fb.feedback_type = SDP_RTCP_FB_TRANSPORT_CC;
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_set_rtcp_fb_ccm
+ * Description: Sets the value of an rtcp-fb:...ccm attribute
+ * Parameters:  sdp_p        The SDP handle returned by sdp_init_description.
+ *              level          The level to set the attribute.
+ *              payload_type   The value to set the payload type to for
+ *                             this attribute. Can be SDP_ALL_PAYLOADS.
+ *              inst_num       The attribute instance number to check.
+ *              type           The ccm type to indicate
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e
+sdp_attr_set_rtcp_fb_ccm(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst,
+                         sdp_rtcp_fb_ccm_type_e type)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_RTCP_FB, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s rtcp_fb ccm attribute, level %u "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    attr_p->attr.rtcp_fb.payload_num = payload_type;
+    attr_p->attr.rtcp_fb.feedback_type = SDP_RTCP_FB_CCM;
+    attr_p->attr.rtcp_fb.param.ccm = type;
+    attr_p->attr.rtcp_fb.extra[0] = '\0';
+    return (SDP_SUCCESS);
+}
+
+/* Function:    sdp_attr_get_extmap_uri
+ * Description: Returns a pointer to the value of the encoding name
+ *              parameter specified for the given attribute.  Value is
+ *              returned as a const ptr and so cannot be modified by the
+ *              application.  If the given attribute is not defined, NULL
+ *              will be returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     Codec value or SDP_CODEC_INVALID.
+ */
+const char *sdp_attr_get_extmap_uri(sdp_t *sdp_p, uint16_t level,
+                                    uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_EXTMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s extmap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (NULL);
+    } else {
+        return (attr_p->attr.extmap.uri);
+    }
+}
+
+/* Function:    sdp_attr_get_extmap_id
+ * Description: Returns the id of the  extmap specified for the given
+ *              attribute.  If the given attribute is not defined, 0xFFFF
+ *              will be returned.
+ * Parameters:  sdp_p     The SDP handle returned by sdp_init_description.
+ *              level       The level to check for the attribute.
+ *              inst_num    The attribute instance number to check.
+ * Returns:     The id of the extmap attribute.
+ */
+uint16_t sdp_attr_get_extmap_id(sdp_t *sdp_p, uint16_t level,
+                           uint16_t inst_num)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_EXTMAP, inst_num);
+    if (attr_p == NULL) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s extmap attribute, level %u instance %u "
+                      "not found.", sdp_p->debug_str, (unsigned)level, (unsigned)inst_num);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return 0xFFFF;
+    } else {
+        return (attr_p->attr.extmap.id);
+    }
+}
+
+/* Function:    sdp_attr_set_extmap
+ * Description: Sets the value of an rtcp-fb:...ccm attribute
+ * Parameters:  sdp_p        The SDP handle returned by sdp_init_description.
+ *              level          The level to set the attribute.
+ *              id             The id to set the attribute.
+ *              uri            The uri to set the attribute.
+ *              inst           The attribute instance number to check.
+ * Returns:     SDP_SUCCESS            Attribute param was set successfully.
+ *              SDP_INVALID_PARAMETER  Specified attribute is not defined.
+ */
+sdp_result_e
+sdp_attr_set_extmap(sdp_t *sdp_p, uint16_t level, uint16_t id, const char* uri, uint16_t inst)
+{
+    sdp_attr_t  *attr_p;
+
+    attr_p = sdp_find_attr(sdp_p, level, 0, SDP_ATTR_EXTMAP, inst);
+    if (!attr_p) {
+        if (sdp_p->debug_flag[SDP_DEBUG_ERRORS]) {
+            SDPLogError(logTag, "%s extmap attribute, level %u "
+                      "instance %u not found.", sdp_p->debug_str, (unsigned)level,
+                      (unsigned)inst);
+        }
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    attr_p->attr.extmap.id = id;
+    sstrncpy(attr_p->attr.extmap.uri, uri, SDP_MAX_STRING_LEN+1);
+    return (SDP_SUCCESS);
+}
+
+const char *sdp_attr_get_msid_identifier(sdp_t *sdp_p, uint16_t level,
+                                       uint8_t cap_num, uint16_t inst)
+{
+    sdp_attr_t  *attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                                        SDP_ATTR_MSID, inst);
+    if (!attr_p) {
+      return NULL;
+    }
+    return attr_p->attr.msid.identifier;
+}
+
+const char *sdp_attr_get_msid_appdata(sdp_t *sdp_p, uint16_t level,
+                                      uint8_t cap_num, uint16_t inst)
+{
+    sdp_attr_t  *attr_p = sdp_find_attr(sdp_p, level, cap_num,
+                                        SDP_ATTR_MSID, inst);
+    if (!attr_p) {
+      return NULL;
+    }
+    return attr_p->attr.msid.appdata;
+}