Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 305 insertions, 0 deletions

diff --git a/epan/osi-utils.c b/epan/osi-utils.c
new file mode 100644
index 0000000..a03b456
--- /dev/null
+++ b/epan/osi-utils.c
@@ -0,0 +1,305 @@
+/* osi-utils.c
+ * Routines for ISO/OSI network and transport protocol packet disassembly
+ * Main entrance point and common functions
+ *
+ * Laurent Deniel <laurent.deniel@free.fr>
+ * Ralf Schneider <Ralf.Schneider@t-online.de>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <glib.h>
+
+#include "tvbuff.h"
+#include "osi-utils.h"
+#include "address.h"
+#include "address_types.h"
+
+static void print_nsap_net_buf( const guint8 *, int, gchar *, int);
+static void print_area_buf ( const guint8 *, int, gchar *, int);
+static void print_address_prefix_buf ( const guint8 *, int, gchar *, int);
+
+/*
+ * XXX - shouldn't there be a centralized routine for dissecting NSAPs?
+ * See also "dissect_atm_nsap()" in epan/dissectors/packet-arp.c and
+ * "dissect_nsap()" in epan/dissectors/packet-isup.c.
+ */
+gchar *
+print_nsap_net( wmem_allocator_t *scope, tvbuff_t *tvb, const gint offset, int length )
+{
+  gchar *cur;
+
+  cur = (gchar *)wmem_alloc(scope, MAX_NSAP_LEN * 3 + 50);
+  print_nsap_net_buf( tvb_get_ptr(tvb, offset, length), length, cur, MAX_NSAP_LEN * 3 + 50);
+  return( cur );
+}
+
+static void
+print_nsap_net_buf( const guint8 *ad, int length, gchar *buf, int buf_len)
+{
+  gchar *cur;
+
+  /* to do : NSAP / NET decoding */
+
+  if ( (length <= 0 ) || ( length > MAX_NSAP_LEN ) ) {
+    (void) g_strlcpy(buf, "<Invalid length of NSAP>", buf_len);
+    return;
+  }
+  cur = buf;
+  if ( ( length == RFC1237_NSAP_LEN ) || ( length == RFC1237_NSAP_LEN + 1 ) ) {
+    print_area_buf(ad, RFC1237_FULLAREA_LEN, cur, buf_len);
+    cur += strlen( cur );
+    print_system_id_buf( ad + RFC1237_FULLAREA_LEN, RFC1237_SYSTEMID_LEN, cur, (int) (buf_len-(cur-buf)));
+    cur += strlen( cur );
+    cur += snprintf(cur, buf_len-(cur-buf), "[%02x]",
+                    ad[ RFC1237_FULLAREA_LEN + RFC1237_SYSTEMID_LEN ] );
+    if ( length == RFC1237_NSAP_LEN + 1 ) {
+      snprintf(cur, (int) (buf_len-(cur-buf)), "-%02x", ad[ length -1 ] );
+    }
+  }
+  else {    /* probably format as standard */
+    /* XXX - this is an NSAP, not an area address/address prefix */
+    print_area_buf( ad, length, buf, buf_len);
+  }
+} /* print_nsap */
+
+gchar *
+print_system_id(wmem_allocator_t* scope, const guint8 *ad, int length )
+{
+  gchar        *cur;
+
+  cur = (gchar *)wmem_alloc(scope, MAX_SYSTEMID_LEN * 3 + 5);
+  print_system_id_buf(ad, length, cur, MAX_SYSTEMID_LEN * 3 + 5);
+  return( cur );
+}
+
+gchar *
+tvb_print_system_id( wmem_allocator_t *scope, tvbuff_t *tvb, const gint offset, int length )
+{
+  return( print_system_id(scope, tvb_get_ptr(tvb, offset, length), length) );
+}
+
+void
+print_system_id_buf( const guint8 *ad, int length, gchar *buf, int buf_len)
+{
+  gchar        *cur;
+  int           tmp;
+
+  if ( ( length <= 0 ) || ( length > MAX_SYSTEMID_LEN ) ) {
+    (void) g_strlcpy(buf, "<Invalid length of SYSTEM ID>", buf_len);
+    return;
+  }
+
+  cur = buf;
+  if ( ( 6 == length ) || /* System-ID */
+       ( 7 == length ) || /* LAN-ID */
+       ( 8 == length )) { /* LSP-ID */
+    cur += snprintf(cur, buf_len, "%02x%02x.%02x%02x.%02x%02x", ad[0], ad[1],
+                    ad[2], ad[3], ad[4], ad[5] );
+    if ( ( 7 == length ) ||
+         ( 8 == length )) {
+        cur += snprintf(cur, buf_len-(cur-buf), ".%02x", ad[6] );
+    }
+    if ( 8 == length ) {
+        snprintf(cur, buf_len-(cur-buf), "-%02x", ad[7] );
+    }
+  }
+  else {
+    tmp = 0;
+    while ( tmp < length / 4 ) { /* 16 / 4 == 4 > four Octets left to print */
+      cur += snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
+      cur += snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
+      cur += snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
+      cur += snprintf(cur, buf_len-(cur-buf), "%02x.", ad[tmp++] );
+    }
+    if ( 1 == tmp ) {   /* Special case for Designated IS */
+      cur--;
+      snprintf(cur, buf_len-(cur-buf), ".%02x", ad[tmp] );
+    }
+    else {
+      for ( ; tmp < length; ) {  /* print the rest without dot */
+        cur += snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
+      }
+    }
+  }
+}
+
+gchar *
+print_area(wmem_allocator_t *scope, tvbuff_t *tvb, const gint offset, int length)
+{
+  gchar *cur;
+
+  cur = (gchar *)wmem_alloc(scope, MAX_AREA_LEN * 3 + 20);
+  print_area_buf(tvb_get_ptr(tvb, offset, length), length, cur, MAX_AREA_LEN * 3 + 20);
+  return cur;
+}
+
+/*
+ * Note: length is in units of half-octets.
+ */
+gchar *
+print_address_prefix(wmem_allocator_t *scope, tvbuff_t *tvb, const gint offset, int length)
+{
+  gchar *cur;
+
+  cur = (gchar *)wmem_alloc(scope, MAX_AREA_LEN * 3 + 20);
+  print_address_prefix_buf(tvb_get_ptr(tvb, offset, (length+1)/2), length, cur, MAX_AREA_LEN * 3 + 20);
+  return cur;
+}
+
+/*
+ * Note: length is in units of octets.
+ */
+static void
+print_area_buf(const guint8 *ad, int length, gchar *buf, int buf_len)
+{
+  print_address_prefix_buf(ad, length*2, buf, buf_len);
+}
+
+/*
+ * Note: length is in units of half-octets.
+ */
+static void
+print_address_prefix_buf(const guint8 *ad, int length, gchar *buf, int buf_len)
+{
+  gchar *cur;
+  int  tmp  = 0;
+
+  /* to do : all real area decoding now: NET is assumed if id len is 1 more byte
+   */
+  if (length <= 0 || length > MAX_AREA_LEN*2) {
+    (void) g_strlcpy(buf, "<Invalid length of AREA>", buf_len);
+    return;
+  }
+
+  cur = buf;
+  /* Check the AFI and length. */
+  if ( (  ( NSAP_IDI_ISO_DCC_BIN      == *ad )
+       || ( NSAP_IDI_ISO_6523_ICD_BIN == *ad )
+       )
+       &&
+       (  ( RFC1237_FULLAREA_LEN*2       ==  length )
+       || ( (RFC1237_FULLAREA_LEN + 1)*2 ==  length )
+       )
+     ) {    /* AFI is good and length is long enough  */
+
+    /* The AFI is either ISO DCC, binary or ISO 6523-ICD, binary,
+     * and the area length corresponds either to the area length
+     * for RFC 1237 (GOSIP) addresses or that length + 1.
+     *
+     * XXX - RFC 1237 doesn't mention ISO DCC, binary, as a valid
+     * AFI; is that from GOSIP Version 1?  If it's ISO DCC, binary,
+     * the IDI is 3 digits, i.e. 1 1/2 octets.
+     */
+    /* there used to be a check for (length > RFC1237_FULLAREA_LEN + 1) here,
+     * in order to report an invalied length of AREA for DCC / ISO 6523 AFI,
+     * but that can *never* be the case because the if() test above explicitly
+     * tests for (length == RFC1237_FULLAREA_LEN) or (length == RFC1237_FULLAREA_LEN + 1)
+     */
+
+    /* Show the one-octet AFI, the two-octet IDI, the one-octet DFI, the
+     * 3-octet AA, and the 2 reserved octets.
+     */
+    cur += snprintf(cur, buf_len-(cur-buf), "[%02x|%02x:%02x][%02x|%02x:%02x:%02x|%02x:%02x]",
+                    ad[0], ad[1], ad[2], ad[3], ad[4],
+                    ad[5], ad[6], ad[7], ad[8] );
+    /* Show the 2-octet RD and the 2-octet Area. */
+    cur += snprintf(cur, buf_len-(cur-buf), "[%02x:%02x|%02x:%02x]",
+                    ad[9], ad[10],  ad[11], ad[12] );
+    /* Show whatever the heck this is; it's not specified by RFC 1237,
+     * but we also handle 14-octet areas.  Is it the "Designated IS"
+     * stuff mentioned below?  (I didn't find anything in the IS-IS
+     * spec about that.)
+     */
+    if ( (RFC1237_FULLAREA_LEN + 1)*2 == length )
+      snprintf(cur, buf_len-(cur-buf), "-[%02x]", ad[13] );
+  }
+  else {
+    /* This doesn't look like a full RFC 1237 IS-IS area, so all we know
+     * is that the first octet is an AFI.  Print it separately from all
+     * the other octets.
+     */
+    if ( length == RFC1237_AREA_LEN*2 ) {
+      /* XXX - RFC1237_AREA_LEN, which is 3 octets, doesn't seem to
+       * correspond to anything in RFC 1237.  Where did it come from?
+       */
+      snprintf(buf, buf_len, "%02x.%02x%02x", ad[0], ad[1], ad[2] );
+      return;
+    }
+    if ( length == 4*2 ) {
+      snprintf(buf, buf_len, "%02x%02x%02x%02x", ad[0], ad[1], ad[2], ad[3] );
+      return;
+    }
+    while ( tmp < length / 8 ) {      /* 32/8==4 > four Octets left to print */
+      cur += snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
+      cur += snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
+      cur += snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
+      cur += snprintf(cur, buf_len-(cur-buf), "%02x.", ad[tmp++] );
+    }
+    if ( 2 == tmp ) {                     /* Special case for Designated IS */
+      cur--;
+      snprintf(cur, buf_len-(cur-buf), "-%02x", ad[tmp] );
+    }
+    else {
+      for ( ; tmp < length / 2; ) {  /* print the rest without dot or dash */
+        cur += snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
+      }
+      /* Odd half-octet? */
+      if (length & 1) {
+        /* Yes - print it (it's the upper half-octet) */
+        snprintf(cur, buf_len-(cur-buf), "%x", (ad[tmp] & 0xF0)>>4 );
+      }
+    }
+  }
+} /* print_address_prefix_buf */
+
+/******************************************************************************
+ * OSI Address Type
+ ******************************************************************************/
+static int osi_address_type = -1;
+
+static int osi_address_to_str(const address* addr, gchar *buf, int buf_len)
+{
+    print_nsap_net_buf((const guint8 *)addr->data, addr->len, buf, buf_len);
+    return (int)strlen(buf)+1;
+}
+
+static int osi_address_str_len(const address* addr _U_)
+{
+    return MAX_NSAP_LEN * 3 + 50;
+}
+
+int get_osi_address_type(void)
+{
+    return osi_address_type;
+}
+
+void register_osi_address_type(void)
+{
+    if (osi_address_type != -1)
+        return;
+
+    osi_address_type = address_type_dissector_register("AT_OSI", "OSI Address", osi_address_to_str, osi_address_str_len, NULL, NULL, NULL, NULL, NULL);
+}
+
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 2
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=2 tabstop=8 expandtab:
+ * :indentSize=2:tabSize=8:noTabs=true:
+ */