Adding upstream version 110.0.1.upstream/110.0.1upstream

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

1 files changed, 1686 insertions, 0 deletions

diff --git a/third_party/sipcc/sdp_token.c b/third_party/sipcc/sdp_token.c
new file mode 100644
index 0000000000..b570d81690
--- /dev/null
+++ b/third_party/sipcc/sdp_token.c
@@ -0,0 +1,1686 @@
+/* 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 <errno.h>
+
+#include "sdp_os_defs.h"
+#include "sipcc_sdp.h"
+#include "sdp_private.h"
+
+#include "sdp_log.h"
+#include "prprf.h"
+
+static const char *logTag = "sdp_token";
+
+#define MCAST_STRING_LEN 4
+
+
+sdp_result_e sdp_parse_version (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    sdp_result_e result = SDP_FAILURE;
+
+    sdp_p->version = (uint16_t)sdp_getnextnumtok(ptr, &ptr, " \t", &result);
+    if ((result != SDP_SUCCESS) || (sdp_p->version != SDP_CURRENT_VERSION)) {
+        sdp_parse_error(sdp_p,
+            "%s Invalid version (%u) found, parse failed.",
+            sdp_p->debug_str, (unsigned)sdp_p->version);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse version line successful, version %u",
+                  sdp_p->debug_str, (unsigned)sdp_p->version);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_version (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    if (sdp_p->version == SDP_INVALID_VALUE) {
+        if (sdp_p->conf_p->version_reqd == TRUE) {
+            SDPLogError(logTag, "%s Invalid version for v= line, "
+                        "build failed.", sdp_p->debug_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        } else {
+            /* v= line is not required. */
+            return (SDP_SUCCESS);
+        }
+    }
+
+    flex_string_sprintf(fs, "v=%u\r\n", (unsigned)sdp_p->version);
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Built v= version line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+static sdp_result_e sdp_verify_unsigned(const char *ptr, uint64_t max_value)
+{
+    uint64_t numeric_value;
+    /* Checking for only numbers since PR_sscanf will ignore trailing
+       characters */
+    size_t end = strspn(ptr, "0123456789");
+
+    if (ptr[end] != '\0')
+        return SDP_INVALID_PARAMETER;
+
+    if (PR_sscanf(ptr, "%llu", &numeric_value) != 1)
+        return SDP_INVALID_PARAMETER;
+
+    if (numeric_value > max_value)
+        return SDP_INVALID_PARAMETER;
+
+    return SDP_SUCCESS;
+}
+
+sdp_result_e sdp_parse_owner (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    int          i;
+    sdp_result_e result;
+    char         tmp[SDP_MAX_STRING_LEN];
+    /* The spec says this:
+
+        The numeric value of the session id
+        and version in the o line MUST be representable with a 64 bit signed
+        integer.  The initial value of the version MUST be less than
+        (2**62)-1, to avoid rollovers.
+    */
+    const uint64_t max_value_sessid = ((((uint64_t) 1) << 63) - 1);
+    /* Do not check that this is 2^62 - 1; that's just the limit on
+     * the initial version, not every version number. */
+    const uint64_t max_value_version = ((((uint64_t) 1) << 63) - 1);
+
+    if (sdp_p->owner_name[0] != '\0') {
+        sdp_p->conf_p->num_invalid_token_order++;
+        sdp_parse_error(sdp_p,
+            "%s Warning: More than one o= line specified.",
+            sdp_p->debug_str);
+    }
+
+    /* Find the owner name. */
+    ptr = sdp_getnextstrtok(ptr, sdp_p->owner_name, sizeof(sdp_p->owner_name), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No owner name specified for o=.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    /* Find the owner session id.  This is a numeric field but is
+     * stored as a string since it may be 64 bit.
+     */
+    ptr = sdp_getnextstrtok(ptr, sdp_p->owner_sessid, sizeof(sdp_p->owner_sessid), " \t", &result);
+    if (result == SDP_SUCCESS) {
+        /* Make sure the sessid is numeric, even though we store it as
+         * a string.
+         */
+        result = sdp_verify_unsigned(sdp_p->owner_sessid, max_value_sessid);
+    }
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s Invalid owner session id specified for o=.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    /* Find the owner version. */
+    ptr = sdp_getnextstrtok(ptr, sdp_p->owner_version, sizeof(sdp_p->owner_version), " \t", &result);
+    if (result == SDP_SUCCESS) {
+        /* Make sure the version is numeric, even though we store it as
+         * a string.
+         */
+        result = sdp_verify_unsigned(sdp_p->owner_version, max_value_version);
+    }
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s Invalid owner version specified for o=.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    /* Find the owner network type. */
+    ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No owner network type specified for o=.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    sdp_p->owner_network_type = SDP_NT_UNSUPPORTED;
+    for (i=0; i < SDP_MAX_NETWORK_TYPES; i++) {
+        if (cpr_strncasecmp(tmp, sdp_nettype[i].name,
+                        sdp_nettype[i].strlen) == 0) {
+            if (sdp_p->conf_p->nettype_supported[i] == TRUE) {
+                sdp_p->owner_network_type = (sdp_nettype_e)i;
+            }
+        }
+    }
+    if (sdp_p->owner_network_type == SDP_NT_UNSUPPORTED) {
+        sdp_parse_error(sdp_p,
+            "%s Owner network type unsupported (%s)",
+            sdp_p->debug_str, tmp);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    /* Find the owner address type. */
+    ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No owner address type specified for o=.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    sdp_p->owner_addr_type = SDP_AT_UNSUPPORTED;
+    for (i=0; i < SDP_MAX_ADDR_TYPES; i++) {
+        if (cpr_strncasecmp(tmp, sdp_addrtype[i].name,
+                        sdp_addrtype[i].strlen) == 0) {
+            if (sdp_p->conf_p->addrtype_supported[i] == TRUE) {
+                sdp_p->owner_addr_type = (sdp_addrtype_e)i;
+            }
+        }
+    }
+    if ((sdp_p->owner_addr_type == SDP_AT_UNSUPPORTED) &&
+        (sdp_p->owner_network_type != SDP_NT_ATM)) {
+        sdp_parse_error(sdp_p,
+            "%s Owner address type unsupported (%s)",
+            sdp_p->debug_str, tmp);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    /* Find the owner address. */
+    ptr = sdp_getnextstrtok(ptr, sdp_p->owner_addr, sizeof(sdp_p->owner_addr), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No owner address specified.", sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse owner: name %s, session id %s, version %s",
+                  sdp_p->debug_str, sdp_p->owner_name, sdp_p->owner_sessid,
+                  sdp_p->owner_version);
+        SDP_PRINT("%s              network %s, address type %s, "
+                  "address %s", sdp_p->debug_str,
+                  sdp_get_network_name(sdp_p->owner_network_type),
+                  sdp_get_address_name(sdp_p->owner_addr_type),
+                  sdp_p->owner_addr);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_owner (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    if ((sdp_p->owner_name[0] == '\0') ||
+        (sdp_p->owner_network_type >= SDP_MAX_NETWORK_TYPES) ||
+        (sdp_p->owner_addr_type >= SDP_MAX_ADDR_TYPES) ||
+        (sdp_p->owner_addr[0] == '\0')) {
+
+        if((sdp_p->owner_network_type == SDP_NT_ATM) &&
+           (sdp_p->owner_addr_type == SDP_AT_INVALID)) {
+          flex_string_sprintf(fs, "o=%s %s %s %s - -\r\n",
+                    sdp_p->owner_name, sdp_p->owner_sessid,
+                    sdp_p->owner_version,
+                    sdp_get_network_name(sdp_p->owner_network_type));
+        }
+
+        if (sdp_p->conf_p->owner_reqd == TRUE) {
+            SDPLogError(logTag, "%s Invalid params for o= owner line, "
+                        "build failed.", sdp_p->debug_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        } else {
+            /* o= line is not required. */
+            return (SDP_SUCCESS);
+        }
+    }
+
+    flex_string_sprintf(fs, "o=%s %s %s %s %s %s\r\n",
+                    sdp_p->owner_name, sdp_p->owner_sessid,
+                    sdp_p->owner_version,
+                    sdp_get_network_name(sdp_p->owner_network_type),
+                    sdp_get_address_name(sdp_p->owner_addr_type),
+                    sdp_p->owner_addr);
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Built o= owner line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_sessname (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    int   str_len;
+    char *endptr;
+
+    if (sdp_p->sessname[0] != '\0') {
+        sdp_p->conf_p->num_invalid_token_order++;
+        sdp_parse_error(sdp_p,
+            "%s Warning: More than one s= line specified.",
+            sdp_p->debug_str);
+    }
+
+    endptr = sdp_findchar(ptr, "\r\n");
+    if (ptr == endptr) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: No session name specified.",
+            sdp_p->debug_str);
+    }
+    str_len = MIN(endptr - ptr, SDP_MAX_STRING_LEN);
+    sstrncpy(sdp_p->sessname, ptr, str_len+1);
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse session name, %s",
+                  sdp_p->debug_str, sdp_p->sessname);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_sessname (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    if (sdp_p->sessname[0] == '\0') {
+        if (sdp_p->conf_p->session_name_reqd == TRUE) {
+            SDPLogError(logTag, "%s No param defined for s= session name line, "
+                        "build failed.", sdp_p->debug_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        } else {
+            /* s= line is not required. */
+            return (SDP_SUCCESS);
+        }
+    }
+
+    flex_string_sprintf(fs, "s=%s\r\n", sdp_p->sessname);
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Built s= session name line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+/* We don't want to store the session info, but we do want to validate
+ * that at most one i= line exists at each level and if the line exists
+ * there should be a parameter.
+ */
+sdp_result_e sdp_parse_sessinfo (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    char *endptr;
+    sdp_mca_t *mca_p;
+
+    if (level == SDP_SESSION_LEVEL) {
+        if (sdp_p->sessinfo_found == TRUE) {
+            sdp_p->conf_p->num_invalid_token_order++;
+            sdp_parse_error(sdp_p,
+                "%s Warning: More than one i= line specified.",
+                sdp_p->debug_str);
+        }
+        sdp_p->sessinfo_found = TRUE;
+    } else {
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            return (SDP_FAILURE);
+        }
+        if (mca_p->sessinfo_found == TRUE) {
+            sdp_p->conf_p->num_invalid_token_order++;
+            sdp_parse_error(sdp_p,
+                "%s Warning: More than one i= line specified"
+                " for media line %u.", sdp_p->debug_str, (unsigned)level);
+        }
+        mca_p->sessinfo_found = TRUE;
+    }
+
+    endptr = sdp_findchar(ptr, "\n");
+    if (ptr == endptr) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: No session info specified.",
+            sdp_p->debug_str);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parsed session info line.", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_sessinfo (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    /* Build session info line not supported. */
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_uri (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    char *endptr;
+
+    if (sdp_p->uri_found == TRUE) {
+        sdp_p->conf_p->num_invalid_token_order++;
+        sdp_parse_error(sdp_p,
+            "%s Warning: More than one u= line specified.",
+            sdp_p->debug_str);
+    }
+    sdp_p->uri_found = TRUE;
+
+    endptr = sdp_findchar(ptr, "\n");
+    if (ptr == endptr) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: No URI info specified.", sdp_p->debug_str);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parsed URI line.", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_uri (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    /* Build URI line not supported. */
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_email (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    char *endptr;
+
+    endptr = sdp_findchar(ptr, "\n");
+    if (ptr == endptr) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: No email info specified.", sdp_p->debug_str);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse email line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_email (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    /* Build email line not supported. */
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_phonenum (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    char *endptr;
+
+    endptr = sdp_findchar(ptr, "\n");
+    if (ptr == endptr) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: No phone number info specified.",
+            sdp_p->debug_str);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse phone number line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_phonenum (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    /* Build phone number line not supported. */
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_connection (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    int           i;
+    const char   *slash_ptr;
+    sdp_result_e  result;
+    sdp_conn_t   *conn_p;
+    sdp_mca_t    *mca_p;
+    char          tmp[SDP_MAX_STRING_LEN];
+    char mcast_str[MCAST_STRING_LEN];
+    int  mcast_bits;
+    unsigned long strtoul_result;
+    char *strtoul_end;
+
+    if (level == SDP_SESSION_LEVEL) {
+        conn_p = &(sdp_p->default_conn);
+    } else {
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            return (SDP_FAILURE);
+        }
+        conn_p = &(mca_p->conn);
+    }
+
+    /* See if the c= line is already defined at this level. We don't
+     * currently support multihoming and so we only support one c= at
+     * each level.
+     */
+    if (conn_p->nettype != SDP_NT_INVALID) {
+        sdp_p->conf_p->num_invalid_token_order++;
+        sdp_parse_error(sdp_p,
+            "%s c= line specified twice at same level, "
+            "parse failed.", sdp_p->debug_str);
+        return (SDP_INVALID_TOKEN_ORDERING);
+    }
+
+    /* Find the connection network type. */
+    ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No connection network type specified for c=.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    conn_p->nettype = SDP_NT_UNSUPPORTED;
+    for (i=0; i < SDP_MAX_NETWORK_TYPES; i++) {
+        if (cpr_strncasecmp(tmp, sdp_nettype[i].name,
+                        sdp_nettype[i].strlen) == 0) {
+            if (sdp_p->conf_p->nettype_supported[i] == TRUE) {
+                conn_p->nettype = (sdp_nettype_e)i;
+            }
+        }
+    }
+    if (conn_p->nettype == SDP_NT_UNSUPPORTED) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: Connection network type unsupported "
+            "(%s) for c=.", sdp_p->debug_str, tmp);
+    }
+
+    /* Find the connection address type. */
+    ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        if (conn_p->nettype == SDP_NT_ATM) {
+            /* If the nettype is ATM, addr type and addr are not reqd */
+            if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+                SDP_PRINT("%s Parse connection: network %s", sdp_p->debug_str,
+                          sdp_get_network_name(conn_p->nettype));
+            }
+            return (SDP_SUCCESS);
+        } else {
+            sdp_parse_error(sdp_p,
+                "%s No connection address type specified for "
+                "c=.", sdp_p->debug_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        }
+    }
+    conn_p->addrtype = SDP_AT_UNSUPPORTED;
+    for (i=0; i < SDP_MAX_ADDR_TYPES; i++) {
+        if (cpr_strncasecmp(tmp, sdp_addrtype[i].name,
+                        sdp_addrtype[i].strlen) == 0) {
+            if (sdp_p->conf_p->addrtype_supported[i] == TRUE) {
+                conn_p->addrtype = (sdp_addrtype_e)i;
+            }
+        }
+    }
+    if (conn_p->addrtype == SDP_AT_UNSUPPORTED) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: Connection address type unsupported "
+            "(%s) for c=.", sdp_p->debug_str, tmp);
+    }
+
+    /* Find the connection address. */
+    ptr = sdp_getnextstrtok(ptr, conn_p->conn_addr, sizeof(conn_p->conn_addr), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No connection address specified for c=.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    /* We currently only support addrs containing '/'s for EPN addrs.
+     * For other addrs this would indicate multicast addrs. */
+    /* Multicast host group addresses are defined to be the IP addresses
+     * whose high-order four bits are 1110, giving an address range from
+     * 224.0.0.0 through 239.255.255.255
+     */
+    /* multicast addr check */
+    sstrncpy (mcast_str, conn_p->conn_addr, MCAST_STRING_LEN);
+
+    if (conn_p->addrtype == SDP_AT_IP4) {
+        errno = 0;
+        strtoul_result = strtoul(mcast_str, &strtoul_end, 10);
+
+        if (errno || mcast_str == strtoul_end || strtoul_result > 255) {
+            sdp_parse_error(sdp_p,
+                            "%s Error parsing address %s for mcast.",
+                            sdp_p->debug_str, mcast_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return SDP_INVALID_PARAMETER;
+        }
+
+
+        mcast_bits = (int) strtoul_result;
+        if ((mcast_bits >= SDP_MIN_MCAST_ADDR_HI_BIT_VAL ) &&
+            (mcast_bits <= SDP_MAX_MCAST_ADDR_HI_BIT_VAL)) {
+            SDP_PRINT("%s Parsed to be a multicast address with mcast bits %d",
+                      sdp_p->debug_str, mcast_bits);
+            conn_p->is_multicast = TRUE;
+        }
+    }
+
+    if (conn_p->addrtype != SDP_AT_EPN) {
+        slash_ptr = sdp_findchar(conn_p->conn_addr, "/");
+        if (slash_ptr[0] != '\0') {
+            /* this used to rely on the above busted multicast check */
+            SDP_PRINT("%s An address with slash %s",
+                      sdp_p->debug_str, conn_p->conn_addr);
+            conn_p->conn_addr[slash_ptr - conn_p->conn_addr] = '\0';
+            slash_ptr++;
+            slash_ptr = sdp_getnextstrtok(slash_ptr, tmp, sizeof(tmp),
+                                          "/", &result);
+            if (result != SDP_SUCCESS) {
+                sdp_parse_error(sdp_p,
+                                "%s No ttl value specified for this multicast addr with a slash",
+                                sdp_p->debug_str);
+                sdp_p->conf_p->num_invalid_param++;
+                return (SDP_INVALID_PARAMETER);
+            }
+
+            errno = 0;
+            strtoul_result = strtoul(tmp, &strtoul_end, 10);
+
+            if (errno || tmp == strtoul_end || conn_p->ttl > SDP_MAX_TTL_VALUE) {
+                sdp_parse_error(sdp_p,
+                                "%s Invalid TTL: Value must be in the range 0-255 ",
+                                sdp_p->debug_str);
+                sdp_p->conf_p->num_invalid_param++;
+                return (SDP_INVALID_PARAMETER);
+            }
+
+            conn_p->ttl = (int) strtoul_result;
+
+            /* search for num of addresses */
+            /*sa_ignore NO_NULL_CHK
+              {ptr is valid since the pointer was checked earlier and the
+              function would have exited if NULL.}*/
+            slash_ptr = sdp_findchar(slash_ptr, "/");
+            if (slash_ptr != NULL &&
+                slash_ptr[0] != '\0') {
+                SDP_PRINT("%s Found a num addr field for multicast addr %s ",
+                          sdp_p->debug_str,slash_ptr);
+                slash_ptr++;
+
+                errno = 0;
+                strtoul_result = strtoul(slash_ptr, &strtoul_end, 10);
+
+                if (errno || slash_ptr == strtoul_end || strtoul_result == 0) {
+                    sdp_parse_error(sdp_p,
+                                    "%s Invalid Num of addresses: Value must be > 0 ",
+                                    sdp_p->debug_str);
+                    sdp_p->conf_p->num_invalid_param++;
+                    return SDP_INVALID_PARAMETER;
+                }
+
+                conn_p->num_of_addresses = (int) strtoul_result;
+            }
+        }
+    }
+
+    /* See if the address is the choose param and if it's allowed. */
+    if ((sdp_p->conf_p->allow_choose[SDP_CHOOSE_CONN_ADDR] == FALSE) &&
+        (strcmp(conn_p->conn_addr, "$") == 0)) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: Choose parameter for connection "
+            "address specified but not allowed.", sdp_p->debug_str);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse connection: network %s, address type %s, "
+                  "address %s ttl= %u num of addresses = %u",
+                  sdp_p->debug_str,
+                  sdp_get_network_name(conn_p->nettype),
+                  sdp_get_address_name(conn_p->addrtype),
+                  conn_p->conn_addr, (unsigned)conn_p->ttl, (unsigned)conn_p->num_of_addresses);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_connection (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    sdp_mca_t  *mca_p;
+    sdp_conn_t *conn_p;
+
+    if (level == SDP_SESSION_LEVEL) {
+        conn_p = &(sdp_p->default_conn);
+    } else {
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            return (SDP_FAILURE);
+        }
+        conn_p = &(mca_p->conn);
+    }
+
+    if((conn_p->nettype == SDP_NT_ATM ) &&
+       (conn_p->addrtype == SDP_AT_INVALID)) {
+        /*allow c= line to be built without address type and address fields
+         * This is a special case for ATM PVC*/
+        flex_string_sprintf(fs, "c=%s\r\n",
+                    sdp_get_network_name(conn_p->nettype));
+        return SDP_SUCCESS;
+    }
+    if ((conn_p->nettype >= SDP_MAX_NETWORK_TYPES) ||
+        (conn_p->addrtype >= SDP_MAX_ADDR_TYPES) ||
+        (conn_p->conn_addr[0] == '\0')) {
+        /* Connection info isn't set - don't need to build the token. */
+        return (SDP_SUCCESS);
+    }
+
+    if (conn_p->is_multicast) {
+        if (conn_p->num_of_addresses > 1) {
+            flex_string_sprintf(fs, "c=%s %s %s/%u/%u\r\n",
+                             sdp_get_network_name(conn_p->nettype),
+                             sdp_get_address_name(conn_p->addrtype),
+                             conn_p->conn_addr,
+                             (unsigned)conn_p->ttl,
+                             (unsigned)conn_p->num_of_addresses);
+        } else {
+            flex_string_sprintf(fs, "c=%s %s %s/%u\r\n",
+                             sdp_get_network_name(conn_p->nettype),
+                             sdp_get_address_name(conn_p->addrtype),
+                             conn_p->conn_addr,
+                             (unsigned)conn_p->ttl);
+        }
+    } else {
+
+        flex_string_sprintf(fs, "c=%s %s %s\r\n",
+                         sdp_get_network_name(conn_p->nettype),
+                         sdp_get_address_name(conn_p->addrtype),
+                         conn_p->conn_addr);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Built c= connection line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+/*
+ * sdp_parse_bandwidth
+ *
+ * This function parses a bandwidth field. The parsing is done in accordance
+ * to the following ABNF:
+ *
+ * bandwidth-fields =    *("b=" bwtype ":" bandwidth CRLF)
+ * bwtype =              1*(alpha-numeric)
+ * bandwidth =           1*(DIGIT)
+ *
+ * It currently supports three types of valid bwtypes - AS, CT and TIAS
+ */
+sdp_result_e sdp_parse_bandwidth (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    int                  i;
+    sdp_mca_t            *mca_p;
+    sdp_bw_t             *bw_p;
+    sdp_bw_data_t        *bw_data_p;
+    sdp_bw_data_t        *new_bw_data_p;
+    sdp_result_e         result;
+    char                 tmp[SDP_MAX_STRING_LEN];
+    sdp_bw_modifier_e    bw_modifier = SDP_BW_MODIFIER_UNSUPPORTED;
+    int                  bw_val = 0;
+
+    if (level == SDP_SESSION_LEVEL) {
+        bw_p = &(sdp_p->bw);
+    } else {
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            return (SDP_FAILURE);
+        }
+        bw_p = &(mca_p->bw);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse bandwidth line", sdp_p->debug_str);
+    }
+
+    /* Find the bw type (AS, CT or TIAS) */
+    ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), ":", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No bandwidth type specified for b= ",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    for (i=0; i < SDP_MAX_BW_MODIFIER_VAL; i++) {
+        if (cpr_strncasecmp(tmp, sdp_bw_modifier_val[i].name,
+                        sdp_bw_modifier_val[i].strlen) == 0) {
+            bw_modifier  = (sdp_bw_modifier_e)i;
+            break;
+        }
+    }
+
+    if (bw_modifier == SDP_BW_MODIFIER_UNSUPPORTED) {
+        /* We don't understand this parameter, so according to RFC4566 sec 5.8
+         * ignore it. */
+        return (SDP_SUCCESS);
+    }
+
+    /* Find the BW type value */
+    /*sa_ignore NO_NULL_CHK
+      {ptr is valid since the pointer was checked earlier and the
+       function would have exited if NULL.}*/
+    if (*ptr == ':') {
+        ptr++;
+        bw_val = sdp_getnextnumtok(ptr, &ptr, " \t", &result);
+        if ((result != SDP_SUCCESS)) {
+            sdp_parse_error(sdp_p,
+                "%s Error: No BW Value specified ",
+                sdp_p->debug_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        }
+    }
+
+    /*
+     * Allocate a new sdp_bw_data_t instance and set it's values from the
+     * input parameters.
+     */
+    new_bw_data_p = (sdp_bw_data_t*)SDP_MALLOC(sizeof(sdp_bw_data_t));
+    if (new_bw_data_p == NULL) {
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_NO_RESOURCE);
+    }
+    new_bw_data_p->next_p = NULL;
+    new_bw_data_p->bw_modifier = bw_modifier;
+    new_bw_data_p->bw_val = bw_val;
+
+    /*
+     * Enqueue the sdp_bw_data_t instance at the end of the list of
+     * sdp_bw_data_t instances.
+     */
+    if (bw_p->bw_data_list == NULL) {
+        bw_p->bw_data_list = new_bw_data_p;
+    } else {
+        for (bw_data_p = bw_p->bw_data_list;
+             bw_data_p->next_p != NULL;
+             bw_data_p = bw_data_p->next_p) {
+            ; // Empty For
+        }
+        bw_data_p->next_p = new_bw_data_p;
+    }
+    bw_p->bw_data_count++;
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parsed bw type %s, value %d", sdp_p->debug_str,
+                     sdp_get_bw_modifier_name(new_bw_data_p->bw_modifier),
+                     new_bw_data_p->bw_val);
+    }
+
+    return (SDP_SUCCESS);
+}
+
+/*
+ * sdp_build_bandwidth
+ *
+ * Builds *all* the bandwith lines for the specified level.
+ */
+sdp_result_e sdp_build_bandwidth (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    sdp_bw_t            *bw_p;
+    sdp_bw_data_t       *bw_data_p;
+    sdp_mca_t           *mca_p;
+
+    if (level == SDP_SESSION_LEVEL) {
+        bw_p = &(sdp_p->bw);
+    } else {
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            return (SDP_FAILURE);
+        }
+        bw_p = &(mca_p->bw);
+    }
+
+    bw_data_p = bw_p->bw_data_list;
+    while (bw_data_p) {
+        flex_string_sprintf(fs, "b=%s:%d\r\n",
+                         sdp_get_bw_modifier_name(bw_data_p->bw_modifier),
+                         bw_data_p->bw_val);
+
+        if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+           SDP_PRINT("%s Built b=%s:%d bandwidth line", sdp_p->debug_str,
+                     sdp_get_bw_modifier_name(bw_data_p->bw_modifier),
+                     bw_data_p->bw_val);
+        }
+
+        bw_data_p = bw_data_p->next_p;
+    }
+
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_timespec (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    char            *tmpptr;
+    sdp_result_e     result;
+    sdp_timespec_t  *timespec_p;
+    sdp_timespec_t  *next_timespec_p;
+
+    timespec_p = (sdp_timespec_t *)SDP_MALLOC(sizeof(sdp_timespec_t));
+    if (timespec_p == NULL) {
+        sdp_p->conf_p->num_no_resource++;
+        return (SDP_NO_RESOURCE);
+    }
+
+    /* Validate start and stop times. */
+    ptr = sdp_getnextstrtok(ptr, timespec_p->start_time, sizeof(timespec_p->start_time), " \t", &result);
+    if (result == SDP_SUCCESS) {
+        /* Make sure the start_time is numeric, even though we store it as
+         * a string.
+         */
+        (void)sdp_getnextnumtok(timespec_p->start_time,
+                                (const char **)&tmpptr, " \t", &result);
+    }
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s Invalid timespec start time specified.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        SDP_FREE(timespec_p);
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    ptr = sdp_getnextstrtok(ptr, timespec_p->stop_time, sizeof(timespec_p->stop_time), " \t", &result);
+    if (result == SDP_SUCCESS) {
+        /* Make sure the start_time is numeric, even though we store it as
+         * a string.
+         */
+        (void)sdp_getnextnumtok(timespec_p->stop_time,
+                                (const char **)&tmpptr, " \t", &result);
+    }
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s Invalid timespec stop time specified.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        SDP_FREE(timespec_p);
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    /* Link the new timespec in to the end of the list. */
+    if (sdp_p->timespec_p == NULL) {
+        sdp_p->timespec_p = timespec_p;
+    } else {
+        next_timespec_p = sdp_p->timespec_p;
+        while (next_timespec_p->next_p != NULL) {
+            next_timespec_p = next_timespec_p->next_p;
+        }
+        next_timespec_p->next_p = timespec_p;
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parsed timespec line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_timespec (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    if ((sdp_p->timespec_p == NULL) ||
+        (sdp_p->timespec_p->start_time[0] == '\0') ||
+        (sdp_p->timespec_p->stop_time[0] == '\0')) {
+        if (sdp_p->conf_p->timespec_reqd == TRUE) {
+            SDPLogError(logTag, "%s Invalid params for t= time spec line, "
+                        "build failed.", sdp_p->debug_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        } else {
+            /* t= line not required. */
+            return (SDP_SUCCESS);
+        }
+    }
+
+    /* Note: We only support one t= line currently. */
+    flex_string_sprintf(fs, "t=%s %s\r\n", sdp_p->timespec_p->start_time,
+                    sdp_p->timespec_p->stop_time);
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Built t= timespec line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_repeat_time (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    char *endptr;
+
+    endptr = sdp_findchar(ptr, "\n");
+    if (ptr == endptr) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: No repeat time parameters "
+            "specified.", sdp_p->debug_str);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parsed repeat time line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_repeat_time (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    /* Build repeat time line not supported. */
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_timezone_adj (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    char *endptr;
+
+    endptr = sdp_findchar(ptr, "\n");
+    if (ptr == endptr) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: No timezone parameters specified.",
+            sdp_p->debug_str);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse timezone adustment line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_timezone_adj (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    /* Build timezone adjustment line not supported. */
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_encryption (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    int                  i;
+    sdp_result_e         result;
+    sdp_encryptspec_t   *encrypt_p;
+    sdp_mca_t           *mca_p;
+    char                 tmp[SDP_MAX_STRING_LEN];
+
+    if (level == SDP_SESSION_LEVEL) {
+        encrypt_p = &(sdp_p->encrypt);
+    } else {
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            return (SDP_FAILURE);
+        }
+        encrypt_p = &(mca_p->encrypt);
+    }
+    encrypt_p->encrypt_key[0] = '\0';
+
+    /* Find the encryption type. */
+    ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), ":", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No encryption type specified for k=.",
+            sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    encrypt_p->encrypt_type = SDP_ENCRYPT_UNSUPPORTED;
+    for (i=0; i < SDP_MAX_ENCRYPT_TYPES; i++) {
+        if (cpr_strncasecmp(tmp, sdp_encrypt[i].name,
+                        sdp_encrypt[i].strlen) == 0) {
+            encrypt_p->encrypt_type = (sdp_encrypt_type_e)i;
+            break;
+        }
+    }
+    if (encrypt_p->encrypt_type == SDP_ENCRYPT_UNSUPPORTED) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: Encryption type unsupported (%s).",
+            sdp_p->debug_str, tmp);
+    }
+
+    /* Find the encryption key. */
+    encrypt_p->encrypt_key[0] = '\0';
+    /*sa_ignore NO_NULL_CHK
+      {ptr is valid since the pointer was checked earlier and the
+       function would have exited if NULL.}*/
+    if (*ptr == ':')
+        ptr++;
+    if (encrypt_p->encrypt_type != SDP_ENCRYPT_PROMPT) {
+        ptr = sdp_getnextstrtok(ptr, encrypt_p->encrypt_key, sizeof(encrypt_p->encrypt_key), " \t", &result);
+        if ((result != SDP_SUCCESS) &&
+            ((encrypt_p->encrypt_type == SDP_ENCRYPT_CLEAR) ||
+             (encrypt_p->encrypt_type == SDP_ENCRYPT_BASE64) ||
+             (encrypt_p->encrypt_type == SDP_ENCRYPT_URI))) {
+            sdp_parse_error(sdp_p,
+                "%s Warning: No encryption key specified "
+                "as required.", sdp_p->debug_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        }
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Parse encryption type %s, key %s", sdp_p->debug_str,
+                   sdp_get_encrypt_name(encrypt_p->encrypt_type),
+                   encrypt_p->encrypt_key);
+    }
+    return (SDP_SUCCESS);
+}
+
+/* If the encryption info is valid, we build it.  Else skip it. */
+sdp_result_e sdp_build_encryption (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    sdp_encryptspec_t   *encrypt_p;
+    sdp_mca_t           *mca_p;
+
+    if (level == SDP_SESSION_LEVEL) {
+        encrypt_p = &(sdp_p->encrypt);
+    } else {
+        mca_p = sdp_find_media_level(sdp_p, level);
+        if (mca_p == NULL) {
+            return (SDP_FAILURE);
+        }
+        encrypt_p = &(mca_p->encrypt);
+    }
+
+    if ((encrypt_p->encrypt_type >= SDP_MAX_ENCRYPT_TYPES) ||
+        ((encrypt_p->encrypt_type != SDP_ENCRYPT_PROMPT) &&
+         (encrypt_p->encrypt_key[0] == '\0'))) {
+        /* Encryption info isn't set - don't need to build the token. */
+        return (SDP_SUCCESS);
+    }
+
+    flex_string_sprintf(fs, "k=%s",
+                     sdp_get_encrypt_name(encrypt_p->encrypt_type));
+
+    if (encrypt_p->encrypt_type == SDP_ENCRYPT_PROMPT) {
+        /* There is no key to print. */
+        flex_string_sprintf(fs, "\r\n");
+    } else {
+        flex_string_sprintf(fs, ":%s\r\n", encrypt_p->encrypt_key);
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Built k= encryption line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_parse_media (sdp_t *sdp_p, uint16_t level, const char *ptr)
+{
+    uint16_t                   i;
+    uint16_t                   num_port_params=0;
+    int32_t                 num[SDP_MAX_PORT_PARAMS];
+    tinybool              valid_param = FALSE;
+    sdp_result_e          result;
+    sdp_mca_t            *mca_p;
+    sdp_mca_t            *next_mca_p;
+    char                  tmp[SDP_MAX_STRING_LEN];
+    char                  port[SDP_MAX_STRING_LEN];
+    const char           *port_ptr;
+    int32_t                 sctp_port;
+
+    /* Allocate resource for new media stream. */
+    mca_p = sdp_alloc_mca(sdp_p->parse_line);
+    if (mca_p == NULL) {
+        sdp_p->conf_p->num_no_resource++;
+        return (SDP_NO_RESOURCE);
+    }
+
+    /* Find the media type. */
+    ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No media type specified, parse failed.",
+            sdp_p->debug_str);
+        SDP_FREE(mca_p);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    mca_p->media = SDP_MEDIA_UNSUPPORTED;
+    for (i=0; i < SDP_MAX_MEDIA_TYPES; i++) {
+        if (cpr_strncasecmp(tmp, sdp_media[i].name,
+                        sdp_media[i].strlen) == 0) {
+            mca_p->media = (sdp_media_e)i;
+        }
+    }
+    if (mca_p->media == SDP_MEDIA_UNSUPPORTED) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: Media type unsupported (%s).",
+            sdp_p->debug_str, tmp);
+    }
+
+    /* Find the port token parameters, but don't process it until
+     * we determine the transport protocol as that determines what
+     * port number formats are valid.
+     */
+    ptr = sdp_getnextstrtok(ptr, port, sizeof(port), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No port specified in m= media line, "
+            "parse failed.", sdp_p->debug_str);
+        SDP_FREE(mca_p);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    port_ptr = port;
+    for (i=0; i < SDP_MAX_PORT_PARAMS; i++) {
+          num[i] = sdp_getnextnumtok(port_ptr, (const char **)&port_ptr,
+                                     "/ \t", &result);
+          if (result != SDP_SUCCESS) {
+              break;
+          }
+        num_port_params++;
+    }
+
+    /* Find the transport protocol type. */
+    ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), " \t", &result);
+    if (result != SDP_SUCCESS) {
+        sdp_parse_error(sdp_p,
+            "%s No transport protocol type specified, "
+            "parse failed.", sdp_p->debug_str);
+        SDP_FREE(mca_p);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+    mca_p->transport = SDP_TRANSPORT_UNSUPPORTED;
+    for (i=0; i < SDP_MAX_TRANSPORT_TYPES; i++) {
+        if (cpr_strncasecmp(tmp, sdp_transport[i].name,
+                        sdp_transport[i].strlen) == 0) {
+            mca_p->transport = (sdp_transport_e)i;
+            break;
+        }
+    }
+
+    if (mca_p->transport == SDP_TRANSPORT_UNSUPPORTED) {
+        /* If we don't recognize or don't support the transport type,
+         * just store the first num as the port.
+         */
+        mca_p->port = num[0];
+        sdp_parse_error(sdp_p,
+            "%s Warning: Transport protocol type unsupported "
+            "(%s).", sdp_p->debug_str, tmp);
+    }
+
+    /* Check for each of the possible port formats according to the
+     * type of transport protocol specified.
+     */
+    valid_param = FALSE;
+    switch (num_port_params) {
+    case 1:
+        if ((mca_p->transport == SDP_TRANSPORT_RTPAVP) ||
+            (mca_p->transport == SDP_TRANSPORT_RTPSAVP) ||
+            (mca_p->transport == SDP_TRANSPORT_RTPSAVPF) ||
+            (mca_p->transport == SDP_TRANSPORT_UDPTLSRTPSAVP) ||
+            (mca_p->transport == SDP_TRANSPORT_UDPTLSRTPSAVPF) ||
+            (mca_p->transport == SDP_TRANSPORT_TCPDTLSRTPSAVP) ||
+            (mca_p->transport == SDP_TRANSPORT_TCPDTLSRTPSAVPF) ||
+            (mca_p->transport == SDP_TRANSPORT_UDP) ||
+            (mca_p->transport == SDP_TRANSPORT_TCP) ||
+            (mca_p->transport == SDP_TRANSPORT_UDPTL) ||
+            (mca_p->transport == SDP_TRANSPORT_UDPSPRT) ||
+            (mca_p->transport == SDP_TRANSPORT_LOCAL) ||
+            (mca_p->transport == SDP_TRANSPORT_DTLSSCTP) ||
+            (mca_p->transport == SDP_TRANSPORT_UDPDTLSSCTP) ||
+            (mca_p->transport == SDP_TRANSPORT_TCPDTLSSCTP)) {
+            /* Port format is simply <port>.  Make sure that either
+             * the choose param is allowed or that the choose value
+             * wasn't specified.
+             */
+            if ((sdp_p->conf_p->allow_choose[SDP_CHOOSE_PORTNUM]) ||
+                (num[0] != SDP_CHOOSE_PARAM)) {
+                mca_p->port        = num[0];
+                mca_p->port_format = SDP_PORT_NUM_ONLY;
+                valid_param        = TRUE;
+            }
+        } else if (mca_p->transport == SDP_TRANSPORT_AAL1AVP) {
+            /* Port format is simply <vcci>, choose param is not allowed.
+             */
+            if (num[0] != SDP_CHOOSE_PARAM) {
+                mca_p->vcci        = num[0];
+                mca_p->port_format = SDP_PORT_VCCI;
+                valid_param        = TRUE;
+            }
+        } else if ((mca_p->transport == SDP_TRANSPORT_AAL2_ITU) ||
+            (mca_p->transport == SDP_TRANSPORT_AAL2_ATMF) ||
+            (mca_p->transport == SDP_TRANSPORT_AAL2_CUSTOM)) {
+            /* Port format is simply <port>, and choose param is allowed,
+             * according to AAL2 definitions.
+             */
+            mca_p->port        = num[0];
+            mca_p->port_format = SDP_PORT_NUM_ONLY;
+            valid_param        = TRUE;
+        }
+        break;
+    case 2:
+        if ((mca_p->transport == SDP_TRANSPORT_RTPAVP) ||
+            (mca_p->transport == SDP_TRANSPORT_RTPSAVP) ||
+            (mca_p->transport == SDP_TRANSPORT_RTPSAVPF) ||
+            (mca_p->transport == SDP_TRANSPORT_UDPTLSRTPSAVP) ||
+            (mca_p->transport == SDP_TRANSPORT_UDPTLSRTPSAVPF) ||
+            (mca_p->transport == SDP_TRANSPORT_TCPDTLSRTPSAVP) ||
+            (mca_p->transport == SDP_TRANSPORT_TCPDTLSRTPSAVPF) ||
+            (mca_p->transport == SDP_TRANSPORT_UDP) ||
+            (mca_p->transport == SDP_TRANSPORT_LOCAL)) {
+            /* Port format is <port>/<num of ports>. Make sure choose
+             * params were not specified.
+             */
+            if ((num[0] != SDP_CHOOSE_PARAM) &&
+                (num[1] != SDP_CHOOSE_PARAM)) {
+                mca_p->port        = num[0];
+                mca_p->num_ports   = num[1];
+                mca_p->port_format = SDP_PORT_NUM_COUNT;
+                valid_param        = TRUE;
+            }
+        } else if (mca_p->transport == SDP_TRANSPORT_UDPTL) {
+            /* Port format is <port>/<num of ports>. Make sure choose
+             * params were not specified.  For UDPTL, only "1" may
+             * be specified for number of ports.
+             */
+            if ((num[0] != SDP_CHOOSE_PARAM) &&
+                (num[1] == 1)) {
+                mca_p->port        = num[0];
+                mca_p->num_ports   = 1;
+                mca_p->port_format = SDP_PORT_NUM_COUNT;
+                valid_param        = TRUE;
+            }
+        } else if (mca_p->transport == SDP_TRANSPORT_CES10) {
+            /* Port format is <vpi>/<vci>. Make sure choose
+             * params were not specified.
+             */
+            if ((num[0] != SDP_CHOOSE_PARAM) &&
+                (num[1] != SDP_CHOOSE_PARAM)) {
+                mca_p->vpi         = num[0];
+                mca_p->vci         = num[1];
+                mca_p->port_format = SDP_PORT_VPI_VCI;
+                valid_param        = TRUE;
+            }
+        } else if ((mca_p->transport == SDP_TRANSPORT_AAL2_ITU) ||
+                   (mca_p->transport == SDP_TRANSPORT_AAL2_ATMF) ||
+                   (mca_p->transport == SDP_TRANSPORT_AAL2_CUSTOM)) {
+            /* Port format is either <vcci>/<cid> or $/$.  If one
+             * param is '$' the other must be also.  The choose params
+             * are allowed by default and don't need to be allowed
+             * through the appl config.
+             */
+            if (((num[0] != SDP_CHOOSE_PARAM) &&
+                 (num[1] != SDP_CHOOSE_PARAM)) ||
+                ((num[0] == SDP_CHOOSE_PARAM) &&
+                 (num[1] == SDP_CHOOSE_PARAM))) {
+                mca_p->vcci        = num[0];
+                mca_p->cid         = num[1];
+                mca_p->port_format = SDP_PORT_VCCI_CID;
+                valid_param        = TRUE;
+            }
+        }
+        break;
+    case 3:
+        if (mca_p->transport == SDP_TRANSPORT_AAL1AVP) {
+            /* Port format is <port>/<vpi>/<vci>. Make sure choose
+             * params were not specified.
+             */
+            if ((num[0] != SDP_CHOOSE_PARAM) &&
+                (num[1] != SDP_CHOOSE_PARAM) &&
+                (num[2] != SDP_CHOOSE_PARAM)) {
+                mca_p->port        = num[0];
+                mca_p->vpi         = num[1];
+                mca_p->vci         = num[2];
+                mca_p->port_format = SDP_PORT_NUM_VPI_VCI;
+                valid_param        = TRUE;
+            }
+        }
+        break;
+    case 4:
+        if ((mca_p->transport == SDP_TRANSPORT_AAL2_ITU) ||
+            (mca_p->transport == SDP_TRANSPORT_AAL2_ATMF) ||
+            (mca_p->transport == SDP_TRANSPORT_AAL2_CUSTOM)) {
+            /* Port format is <port>/<vpi>/<vci>/<cid>. Make sure choose
+             * params were not specified.
+             */
+            if ((num[0] != SDP_CHOOSE_PARAM) &&
+                (num[1] != SDP_CHOOSE_PARAM) &&
+                (num[2] != SDP_CHOOSE_PARAM) &&
+                (num[3] != SDP_CHOOSE_PARAM)) {
+                mca_p->port        = num[0];
+                mca_p->vpi         = num[1];
+                mca_p->vci         = num[2];
+                mca_p->cid         = num[3];
+                mca_p->port_format = SDP_PORT_NUM_VPI_VCI_CID;
+                valid_param        = TRUE;
+            }
+        }
+        break;
+    }
+    if (valid_param == FALSE) {
+        sdp_parse_error(sdp_p,
+            "%s Invalid port format (%s) specified for transport "
+            "protocol (%s), parse failed.", sdp_p->debug_str,
+            port, sdp_get_transport_name(mca_p->transport));
+        sdp_p->conf_p->num_invalid_param++;
+        SDP_FREE(mca_p);
+        return (SDP_INVALID_PARAMETER);
+    }
+
+        if ((mca_p->transport == SDP_TRANSPORT_DTLSSCTP) ||
+            (mca_p->transport == SDP_TRANSPORT_UDPDTLSSCTP) ||
+            (mca_p->transport == SDP_TRANSPORT_TCPDTLSSCTP)) {
+        ptr = sdp_getnextstrtok(ptr, port, sizeof(port), " \t", &result);
+        if (result != SDP_SUCCESS) {
+            sdp_parse_error(sdp_p,
+                "%s No sctp port specified in m= media line, "
+                "parse failed.", sdp_p->debug_str);
+            SDP_FREE(mca_p);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        }
+        port_ptr = port;
+
+        if ((mca_p->transport == SDP_TRANSPORT_UDPDTLSSCTP) ||
+            (mca_p->transport == SDP_TRANSPORT_TCPDTLSSCTP)) {
+            if (cpr_strncasecmp(port_ptr, "webrtc-datachannel",
+                                sizeof("webrtc-datachannel")) != 0) {
+                sdp_parse_error(sdp_p,
+                    "%s No webrtc-datachannel token in m= media line, "
+                    "parse failed.", sdp_p->debug_str);
+                SDP_FREE(mca_p);
+                sdp_p->conf_p->num_invalid_param++;
+                return (SDP_INVALID_PARAMETER);
+            }
+            mca_p->sctp_fmt = SDP_SCTP_MEDIA_FMT_WEBRTC_DATACHANNEL;
+        } else {
+            sctp_port = sdp_getnextnumtok(port_ptr, (const char **)&port_ptr,
+                                           "/ \t", &result);
+            if (result != SDP_SUCCESS) {
+                sdp_parse_error(sdp_p,
+                    "%s No sctp port specified in m= media line, "
+                    "parse failed.", sdp_p->debug_str);
+                SDP_FREE(mca_p);
+                sdp_p->conf_p->num_invalid_param++;
+                return (SDP_INVALID_PARAMETER);
+            }
+            mca_p->sctpport = sctp_port;
+        }
+    } else {
+        /* Transport is a non-AAL2 type and not SCTP.  Parse payloads
+           normally. */
+        sdp_parse_payload_types(sdp_p, mca_p, ptr);
+    }
+
+
+    /* Media line params are valid.  Add it into the SDP. */
+    sdp_p->mca_count++;
+    if (sdp_p->mca_p == NULL) {
+        sdp_p->mca_p = mca_p;
+    } else {
+        for (next_mca_p = sdp_p->mca_p; next_mca_p->next_p != NULL;
+             next_mca_p = next_mca_p->next_p) {
+            ; // Empty For
+        }
+        next_mca_p->next_p = mca_p;
+    }
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+
+        SDP_PRINT("%s Parsed media type %s, ", sdp_p->debug_str,
+                  sdp_get_media_name(mca_p->media));
+        switch (mca_p->port_format) {
+        case SDP_PORT_NUM_ONLY:
+            SDP_PRINT("Port num %d, ", mca_p->port);
+            break;
+
+        case SDP_PORT_NUM_COUNT:
+            SDP_PRINT("Port num %d, count %d, ",
+                      mca_p->port, mca_p->num_ports);
+            break;
+        case SDP_PORT_VPI_VCI:
+            SDP_PRINT("VPI/VCI %d/%u, ", mca_p->vpi, mca_p->vci);
+            break;
+        case SDP_PORT_VCCI:
+            SDP_PRINT("VCCI %d, ", mca_p->vcci);
+            break;
+        case SDP_PORT_NUM_VPI_VCI:
+            SDP_PRINT("Port %d, VPI/VCI %d/%u, ", mca_p->port,
+                      mca_p->vpi, mca_p->vci);
+            break;
+        case SDP_PORT_VCCI_CID:
+            SDP_PRINT("VCCI %d, CID %d, ", mca_p->vcci, mca_p->cid);
+            break;
+        case SDP_PORT_NUM_VPI_VCI_CID:
+            SDP_PRINT("Port %d, VPI/VCI %d/%u, CID %d, ", mca_p->port,
+                      mca_p->vpi, mca_p->vci, mca_p->cid);
+            break;
+        default:
+            SDP_PRINT("Port format not valid, ");
+            break;
+        }
+
+        if ((mca_p->transport >= SDP_TRANSPORT_AAL2_ITU) &&
+            (mca_p->transport <= SDP_TRANSPORT_AAL2_CUSTOM)) {
+            for (i=0; i < mca_p->media_profiles_p->num_profiles; i++) {
+                SDP_PRINT("Profile %s, Num payloads %u ",
+                   sdp_get_transport_name(mca_p->media_profiles_p->profile[i]),
+                   (unsigned)mca_p->media_profiles_p->num_payloads[i]);
+            }
+        } else {
+            SDP_PRINT("Transport %s, Num payloads %u",
+                      sdp_get_transport_name(mca_p->transport),
+                      (unsigned)mca_p->num_payloads);
+        }
+    }
+    return (SDP_SUCCESS);
+}
+
+sdp_result_e sdp_build_media (sdp_t *sdp_p, uint16_t level, flex_string *fs)
+{
+    int                   i, j;
+    sdp_mca_t            *mca_p;
+    tinybool              invalid_params=FALSE;
+    sdp_media_profiles_t *profile_p;
+
+    /* Find the right media line */
+    mca_p = sdp_find_media_level(sdp_p, level);
+    if (mca_p == NULL) {
+        return (SDP_FAILURE);
+    }
+
+    /* Validate params for this media line */
+    if ((mca_p->media >= SDP_MAX_MEDIA_TYPES) ||
+        (mca_p->port_format >= SDP_MAX_PORT_FORMAT_TYPES) ||
+        (mca_p->transport >= SDP_MAX_TRANSPORT_TYPES)) {
+        invalid_params = TRUE;
+    }
+
+    if (invalid_params == TRUE) {
+        SDPLogError(logTag, "%s Invalid params for m= media line, "
+                    "build failed.", sdp_p->debug_str);
+        sdp_p->conf_p->num_invalid_param++;
+        return (SDP_INVALID_PARAMETER);
+    }
+
+    /* Build the media type */
+    flex_string_sprintf(fs, "m=%s ", sdp_get_media_name(mca_p->media));
+
+    /* Build the port based on the specified port format */
+    if (mca_p->port_format == SDP_PORT_NUM_ONLY) {
+        if (mca_p->port == SDP_CHOOSE_PARAM) {
+            flex_string_sprintf(fs, "$ ");
+        } else {
+            flex_string_sprintf(fs, "%u ", (unsigned)mca_p->port);
+        }
+    } else if (mca_p->port_format == SDP_PORT_NUM_COUNT) {
+        flex_string_sprintf(fs, "%u/%u ", (unsigned)mca_p->port,
+                        (unsigned)mca_p->num_ports);
+    } else if (mca_p->port_format == SDP_PORT_VPI_VCI) {
+        flex_string_sprintf(fs, "%u/%u ",
+                         (unsigned)mca_p->vpi, (unsigned)mca_p->vci);
+    } else if (mca_p->port_format == SDP_PORT_VCCI) {
+        flex_string_sprintf(fs, "%u ", (unsigned)mca_p->vcci);
+    } else if (mca_p->port_format == SDP_PORT_NUM_VPI_VCI) {
+        flex_string_sprintf(fs, "%u/%u/%u ", (unsigned)mca_p->port,
+                         (unsigned)mca_p->vpi, (unsigned)mca_p->vci);
+    } else if (mca_p->port_format == SDP_PORT_VCCI_CID) {
+        if ((mca_p->vcci == SDP_CHOOSE_PARAM) &&
+            (mca_p->cid == SDP_CHOOSE_PARAM)) {
+            flex_string_sprintf(fs, "$/$ ");
+        } else if ((mca_p->vcci == SDP_CHOOSE_PARAM) ||
+                   (mca_p->cid == SDP_CHOOSE_PARAM)) {
+            /* If one is set but not the other, this is an error. */
+            SDPLogError(logTag, "%s Invalid params for m= port parameter, "
+                        "build failed.", sdp_p->debug_str);
+            sdp_p->conf_p->num_invalid_param++;
+            return (SDP_INVALID_PARAMETER);
+        } else {
+            flex_string_sprintf(fs, "%u/%u ",
+                             (unsigned)mca_p->vcci, (unsigned)mca_p->cid);
+        }
+    } else if (mca_p->port_format == SDP_PORT_NUM_VPI_VCI_CID) {
+        flex_string_sprintf(fs, "%u/%u/%u/%u ", (unsigned)mca_p->port,
+                        (unsigned)mca_p->vpi, (unsigned)mca_p->vci, (unsigned)mca_p->cid);
+    }
+
+    /* If the media line has AAL2 profiles, build them differently. */
+    if ((mca_p->transport == SDP_TRANSPORT_AAL2_ITU) ||
+        (mca_p->transport == SDP_TRANSPORT_AAL2_ATMF) ||
+        (mca_p->transport == SDP_TRANSPORT_AAL2_CUSTOM)) {
+        profile_p = mca_p->media_profiles_p;
+        for (i=0; i < profile_p->num_profiles; i++) {
+            flex_string_sprintf(fs, "%s",
+                             sdp_get_transport_name(profile_p->profile[i]));
+
+            for (j=0; j < profile_p->num_payloads[i]; j++) {
+                flex_string_sprintf(fs, " %u",
+                                 (unsigned)profile_p->payload_type[i][j]);
+            }
+            flex_string_sprintf(fs, " ");
+        }
+        flex_string_sprintf(fs, "\n");
+        if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+            SDP_PRINT("%s Built m= media line", sdp_p->debug_str);
+        }
+        return (SDP_SUCCESS);
+    }
+
+    /* Build the transport name */
+    flex_string_sprintf(fs, "%s",
+                     sdp_get_transport_name(mca_p->transport));
+
+    if(mca_p->transport != SDP_TRANSPORT_DTLSSCTP) {
+
+        /* Build the format lists */
+        for (i=0; i < mca_p->num_payloads; i++) {
+            if (mca_p->payload_indicator[i] == SDP_PAYLOAD_ENUM) {
+                flex_string_sprintf(fs, " %s",
+                                 sdp_get_payload_name((sdp_payload_e)mca_p->payload_type[i]));
+            } else {
+                flex_string_sprintf(fs, " %u", (unsigned)mca_p->payload_type[i]);
+            }
+        }
+    } else {
+        /* Add port to SDP if transport is DTLS/SCTP */
+        flex_string_sprintf(fs, " %u", (unsigned)mca_p->sctpport);
+    }
+
+    flex_string_sprintf(fs, "\r\n");
+
+    if (sdp_p->debug_flag[SDP_DEBUG_TRACE]) {
+        SDP_PRINT("%s Built m= media line", sdp_p->debug_str);
+    }
+    return (SDP_SUCCESS);
+}
+
+
+/* Function:    sdp_parse_payload_types
+ * Description: Parse a list of payload types.  The list may be part of
+ *              a media line or part of a capability line.
+ * Parameters:  sdp_ptr      The SDP handle returned by sdp_init_description.
+ *              mca_p        The mca structure the payload types should be
+ *                           added to.
+ *              ptr          The pointer to the list of payloads.
+ * Returns:     Nothing.
+ */
+void sdp_parse_payload_types (sdp_t *sdp_p, sdp_mca_t *mca_p, const char *ptr)
+{
+    uint16_t           i;
+    uint16_t           num_payloads;
+    sdp_result_e  result;
+    tinybool      valid_payload;
+    char          tmp[SDP_MAX_STRING_LEN];
+    char         *tmp2;
+
+    for (num_payloads = 0; (num_payloads < SDP_MAX_PAYLOAD_TYPES); ) {
+        ptr = sdp_getnextstrtok(ptr, tmp, sizeof(tmp), " \t", &result);
+        if (result != SDP_SUCCESS) {
+            /* If there are no more payload types, we're finished */
+            break;
+        }
+        mca_p->payload_type[num_payloads] = (uint16_t)sdp_getnextnumtok(tmp,
+                                                        (const char **)&tmp2,
+                                                        " \t", &result);
+        if (result == SDP_SUCCESS) {
+            if ((mca_p->media == SDP_MEDIA_IMAGE) &&
+                (mca_p->transport == SDP_TRANSPORT_UDPTL)) {
+                sdp_parse_error(sdp_p,
+                    "%s Warning: Numeric payload type not "
+                    "valid for media %s with transport %s.",
+                    sdp_p->debug_str,
+                    sdp_get_media_name(mca_p->media),
+                    sdp_get_transport_name(mca_p->transport));
+            } else {
+                mca_p->payload_indicator[num_payloads] = SDP_PAYLOAD_NUMERIC;
+                mca_p->num_payloads++;
+                num_payloads++;
+            }
+            continue;
+        }
+
+        valid_payload = FALSE;
+        for (i=0; i < SDP_MAX_STRING_PAYLOAD_TYPES; i++) {
+            if (cpr_strncasecmp(tmp, sdp_payload[i].name,
+                            sdp_payload[i].strlen) == 0) {
+                valid_payload = TRUE;
+                break;
+            }
+        }
+        if (valid_payload == TRUE) {
+            /* We recognized the payload type.  Make sure it
+             * is valid for this media line. */
+            valid_payload = FALSE;
+            if ((mca_p->media == SDP_MEDIA_IMAGE) &&
+                (mca_p->transport == SDP_TRANSPORT_UDPTL) &&
+                (i == SDP_PAYLOAD_T38)) {
+                valid_payload = TRUE;
+            } else if ((mca_p->media == SDP_MEDIA_APPLICATION) &&
+                       (mca_p->transport == SDP_TRANSPORT_UDP) &&
+                       (i == SDP_PAYLOAD_XTMR)) {
+                valid_payload = TRUE;
+            } else if ((mca_p->media == SDP_MEDIA_APPLICATION) &&
+                       (mca_p->transport == SDP_TRANSPORT_TCP) &&
+                       (i == SDP_PAYLOAD_T120)) {
+                valid_payload = TRUE;
+            }
+
+            if (valid_payload == TRUE) {
+                mca_p->payload_indicator[num_payloads] = SDP_PAYLOAD_ENUM;
+                mca_p->payload_type[num_payloads] = i;
+                mca_p->num_payloads++;
+                num_payloads++;
+            } else {
+                sdp_parse_error(sdp_p,
+                    "%s Warning: Payload type %s not valid for "
+                    "media %s with transport %s.",
+                    sdp_p->debug_str,
+                    sdp_get_payload_name((sdp_payload_e)i),
+                    sdp_get_media_name(mca_p->media),
+                    sdp_get_transport_name(mca_p->transport));
+            }
+        } else {
+            /* Payload type wasn't recognized. */
+            sdp_parse_error(sdp_p,
+                "%s Warning: Payload type "
+                "unsupported (%s).", sdp_p->debug_str, tmp);
+        }
+    }
+    if (mca_p->num_payloads == 0) {
+        sdp_parse_error(sdp_p,
+            "%s Warning: No payload types specified.",
+            sdp_p->debug_str);
+    }
+}
+