--- /dev/null
+/* packet-alcap.c
+ * Routines for ALCAP (Q.2630.1) dissection
+ * AAL type 2 signalling protocol - Capability set 1
+ * 12/1999
+ *
+ * Copyright 2003, Michael Lum <mlum [AT] telostech.com>
+ * In association with Telos Technology Inc.
+ *
+ * $Id: packet-alcap.c,v 1.1 2003/10/06 09:18:07 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <gmodule.h>
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
+#include <string.h>
+
+#include "epan/packet.h"
+
+
+#define ALCAP_MSG_HEADER_LEN 6
+#define ALCAP_PARM_HEADER_LEN 3
+
+#define ALCAP_SI 12
+
+#define EXTRANEOUS_DATA_CHECK(edc_len, edc_max_len) \
+ if ((edc_len) > (edc_max_len)) \
+ { \
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb, \
+ curr_offset, (edc_len) - (edc_max_len), "Extraneous Data"); \
+ }
+
+#define SHORT_DATA_CHECK(sdc_len, sdc_min_len) \
+ if ((sdc_len) < (sdc_min_len)) \
+ { \
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb, \
+ curr_offset, (sdc_len), "Short Data (?)"); \
+ return; \
+ }
+
+#define EXACT_DATA_CHECK(edc_len, edc_eq_len) \
+ if ((edc_len) != (edc_eq_len)) \
+ { \
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb, \
+ curr_offset, (edc_len), "Unexpected Data Length"); \
+ return; \
+ }
+
+static const value_string msg_parm_strings[];
+
+static char *alcap_proto_name = "AAL type 2 signalling protocol - Capability set 1 (Q.2630.1)";
+static char *alcap_proto_name_short = "ALCAP";
+
+/* Initialize the subtree pointers */
+static gint ett_alcap = -1;
+static gint ett_parm = -1;
+
+/* Initialize the protocol and registered fields */
+static int proto_alcap = -1;
+static int hf_alcap_msg_type = -1;
+static int hf_alcap_length = -1;
+static int hf_alcap_parm_id = -1;
+static int hf_alcap_none = -1;
+static int hf_alcap_dsaid = -1;
+static int hf_alcap_osaid = -1;
+static int hf_alcap_aal2_path_id = -1;
+static int hf_alcap_channel_id = -1;
+static int hf_alcap_organizational_unique_id = -1;
+static int hf_alcap_served_user_gen_ref = -1;
+static int hf_alcap_nsap_address = -1;
+
+static char bigbuf[1024];
+static char bigbuf2[1024];
+static dissector_handle_t data_handle;
+static packet_info *g_pinfo;
+static proto_tree *g_tree;
+
+#define FIELD_COMPATIBILITY 0
+#define FIELD_SIGNALLING_ASSOC_ID 1
+#define FIELD_AAL2_PATH_ID 2
+#define FIELD_CHANNEL_ID 3
+#define FIELD_ORGANIZATIONAL_UNIQUE_ID 4
+#define FIELD_AUDIO_SERVICE 5
+#define FIELD_MULTIRATE_SERVICE 6
+#define FIELD_SEG_REASSEMBLY_ASS 7
+#define FIELD_SEG_REASSEMBLY_UNASS 8
+#define FIELD_SERVED_USER_GEN_REF 9
+#define FIELD_MAX_CPS_SDU_BIT_RATE 10
+#define FIELD_AVG_CPS_SDU_BIT_RATE 11
+#define FIELD_MAX_CPS_SDU_SIZE 12
+#define FIELD_AVG_CPS_SDU_SIZE 13
+#define FIELD_NATURE_OF_ADDRESS 14
+#define FIELD_E164_ADDRESS 15
+#define FIELD_NSAP_ADDRESS 16
+#define FIELD_CAUSE_VALUE 17
+#define FIELD_DIAGNOSTICS 18
+#define FIELD_SERVED_USER_TRANSPORT 19
+static const char * field_strings[] = {
+ "Compatibility",
+ "Signalling association identifier",
+ "AAL type 2 path identifier",
+ "Channel identifier (CID)",
+ "Organizational unique identifier (OUI)",
+ "Audio service",
+ "Multirate service",
+ "Segmentation and reassembly (assured data transfer)",
+ "Segmentation and reassembly (unassured data transfer)",
+ "Served user generated reference",
+ "Maximum CPS-SDU bit rate",
+ "Average CPS-SDU bit rate",
+ "Maximum CPS-SDU size",
+ "Average CPS-SDU size",
+ "Nature of address",
+ "E.164 address",
+ "NSAP address",
+ "Cause value",
+ "Diagnostics",
+ "Served user transport"
+};
+#define NUM_FIELDS (sizeof(field_strings)/sizeof(char *))
+static gint ett_fields[NUM_FIELDS];
+
+static const value_string msg_type_strings[] = {
+ { 1, "Block confirm (BLC)" },
+ { 2, "Block request (BLO)" },
+ { 3, "Confusion (CFN)" },
+ { 4, "Establish confirm (ECF)" },
+ { 5, "Establish request (ERQ)" },
+ { 6, "Release confirm (RLC)" },
+ { 7, "Release request (REL)" },
+ { 8, "Reset confirm (RSC)" },
+ { 9, "Reset request (RES)" },
+ { 10, "Unblock confirm (UBC)" },
+ { 11, "Unblock request (UBL)" },
+ { 0, NULL },
+};
+
+/* FUNCTIONS */
+
+/* Generate, into "buf", a string showing the bits of a bitfield.
+ * Return a pointer to the character after that string.
+ */
+static char *
+my_decode_bitfield_value(char *buf, guint32 val, guint32 mask, int width)
+{
+ int i;
+ guint32 bit;
+ char *p;
+
+ i = 0;
+ p = buf;
+ bit = 1 << (width - 1);
+
+ for (;;)
+ {
+ if (mask & bit)
+ {
+ /* This bit is part of the field. Show its value. */
+ if (val & bit)
+ *p++ = '1';
+ else
+ *p++ = '0';
+ }
+ else
+ {
+ /* This bit is not part of the field. */
+ *p++ = '.';
+ }
+
+ bit >>= 1;
+ i++;
+ if (i >= width) break;
+ if (i % 4 == 0) *p++ = ' ';
+ }
+
+ *p = '\0';
+
+ return(p);
+}
+
+static gchar *
+my_match_strval(guint32 val, const value_string *vs, gint *idx)
+{
+ gint i = 0;
+
+ while (vs[i].strptr) {
+ if (vs[i].value == val)
+ {
+ *idx = i;
+ return(vs[i].strptr);
+ }
+
+ i++;
+ }
+
+ *idx = -1;
+ return(NULL);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.1
+ */
+static void
+dis_field_compatibility(tvbuff_t *tvb, proto_tree *tree, guint32 *offset, gboolean message)
+{
+ guint32 curr_offset;
+ guint8 compat;
+ proto_item *item;
+ proto_tree *subtree;
+ gchar *str = NULL;
+
+ curr_offset = *offset;
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, 1, "%s %s",
+ message ? "Message" : "Parameter",
+ field_strings[FIELD_COMPATIBILITY]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_COMPATIBILITY]);
+
+ compat = tvb_get_guint8(tvb, curr_offset);
+
+ my_decode_bitfield_value(bigbuf, compat, 0x80, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ my_decode_bitfield_value(bigbuf, compat, 0x40, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Pass-on not possible - %s",
+ bigbuf,
+ (compat & 0x40) ? "Send notification" : "Do not send notification");
+
+ switch ((compat & 0x30) >> 4)
+ {
+ case 0x00:
+ str = "Pass on message or parameter (Release connection)";
+ break;
+
+ case 0x01:
+ if (message)
+ {
+ str = "Discard parameter (Discard message)";
+ }
+ else
+ {
+ str = "Discard parameter";
+ }
+ break;
+
+ case 0x02:
+ str = "Discard message";
+ break;
+
+ case 0x03:
+ str = "Release connection";
+ break;
+ }
+
+ my_decode_bitfield_value(bigbuf, compat, 0x30, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Pass-on not possible, instruction - %s",
+ bigbuf,
+ str);
+
+ my_decode_bitfield_value(bigbuf, compat, 0x08, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ my_decode_bitfield_value(bigbuf, compat, 0x04, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : General action - %s",
+ bigbuf,
+ (compat & 0x04) ? "Send notification" : "Do not send notification");
+
+ switch (compat & 0x03)
+ {
+ case 0x00:
+ str = "Pass on message or parameter";
+ break;
+
+ case 0x01:
+ if (message)
+ {
+ str = "Discard parameter (Discard message)";
+ }
+ else
+ {
+ str = "Discard parameter";
+ }
+ break;
+
+ case 0x02:
+ str = "Discard message";
+ break;
+
+ case 0x03:
+ str = "Release connection";
+ break;
+ }
+
+ my_decode_bitfield_value(bigbuf, compat, 0x03, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : General action, instruction - %s",
+ bigbuf,
+ str);
+
+ *offset += 1;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.2
+ */
+static void
+dis_field_signalling_assoc_id(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean destination)
+{
+ guint32 curr_offset;
+ guint32 value;
+
+ curr_offset = *offset;
+
+#define FIELD_SIGNALLING_ASSOC_ID_LEN 4
+
+ SHORT_DATA_CHECK(*len, FIELD_SIGNALLING_ASSOC_ID_LEN);
+
+ value = tvb_get_ntohl(tvb, curr_offset);
+
+ if (destination)
+ {
+ proto_tree_add_uint_format(tree, hf_alcap_dsaid, tvb,
+ curr_offset, FIELD_SIGNALLING_ASSOC_ID_LEN, value,
+ "Destination signalling association identifier: %d%s",
+ value,
+ value ? "" : " (unknown)");
+ }
+ else
+ {
+ proto_tree_add_uint(tree, hf_alcap_osaid, tvb,
+ curr_offset, FIELD_SIGNALLING_ASSOC_ID_LEN, value);
+ }
+
+ curr_offset += FIELD_SIGNALLING_ASSOC_ID_LEN;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.3
+ */
+static void
+dis_field_aal2_path_id(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint32 value;
+
+ curr_offset = *offset;
+
+#define FIELD_AAL2_PATH_ID_LEN 4
+
+ SHORT_DATA_CHECK(*len, FIELD_AAL2_PATH_ID_LEN);
+
+ value = tvb_get_ntohl(tvb, curr_offset);
+
+ proto_tree_add_uint_format(tree, hf_alcap_aal2_path_id, tvb,
+ curr_offset, FIELD_AAL2_PATH_ID_LEN, value,
+ "AAL2 path identifier: %d%s",
+ value,
+ value ? "" : " (Null)");
+
+ curr_offset += FIELD_AAL2_PATH_ID_LEN;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.4
+ */
+static void
+dis_field_channel_id(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint8 oct;
+
+ curr_offset = *offset;
+
+ SHORT_DATA_CHECK(*len, 1);
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ proto_tree_add_uint_format(tree, hf_alcap_channel_id, tvb,
+ curr_offset, 1, oct,
+ "Channel identifier (CID): %d%s",
+ oct,
+ oct ? "" : " (Null)");
+
+ curr_offset++;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.5
+ */
+static void
+dis_field_organizational_unique_id(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint32 octs;
+
+ curr_offset = *offset;
+
+#define FIELD_ORGANIZATIONAL_UNIQUE_ID_LEN 3
+
+ SHORT_DATA_CHECK(*len, FIELD_ORGANIZATIONAL_UNIQUE_ID_LEN);
+
+ octs = tvb_get_ntoh24(tvb, curr_offset);
+
+ proto_tree_add_uint(tree, hf_alcap_organizational_unique_id, tvb,
+ curr_offset, FIELD_ORGANIZATIONAL_UNIQUE_ID_LEN, octs);
+
+ curr_offset += FIELD_ORGANIZATIONAL_UNIQUE_ID_LEN;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.6
+ */
+static void
+dis_field_audio_service(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint32 value;
+ guint8 oct;
+ proto_item *item;
+ proto_tree *subtree;
+ gchar *str = NULL;
+
+ curr_offset = *offset;
+
+#define FIELD_AUDIO_SERVICE_LEN 5
+
+ SHORT_DATA_CHECK(*len, FIELD_AUDIO_SERVICE_LEN);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, FIELD_AUDIO_SERVICE_LEN, field_strings[FIELD_AUDIO_SERVICE]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_AUDIO_SERVICE]);
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ switch ((oct & 0xc0) >> 6)
+ {
+ case 0x00: str = "Designates a profile specified by ITU-T Rec. I.366.2; ignore organizational unique identifier"; break;
+ case 0x01: str = "Designates a profile specified by organizational unique identifier"; break;
+ case 0x02: str = "Designates a custom profile; ignore organizational unique identifier"; break;
+ case 0x03: str = "Reserved"; break;
+ }
+
+ my_decode_bitfield_value(bigbuf, oct, 0xc0, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Profile type, %s",
+ bigbuf, str);
+
+ my_decode_bitfield_value(bigbuf, oct, 0x3f, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ curr_offset++;
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "Profile identifier (%d)",
+ oct);
+
+ curr_offset++;
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ my_decode_bitfield_value(bigbuf, oct, 0x80, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : FRM, transport of frame mode data %s",
+ bigbuf,
+ (oct & 0x80) ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x40, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : CMD, transport of circuit mode data (64 kbit/s) %s",
+ bigbuf,
+ (oct & 0x40) ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x20, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : MF-R2, transport of multi-frequency R2 dialled digits %s",
+ bigbuf,
+ (oct & 0x20) ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x10, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : MF-R1, transport of multi-frequency R1 dialled digits %s",
+ bigbuf,
+ (oct & 0x10) ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x08, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : DTMF, transport of dual tone multi-frequency dialled digits %s",
+ bigbuf,
+ (oct & 0x08) ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x04, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : CAS, transport of channel associated signalling %s",
+ bigbuf,
+ (oct & 0x04) ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x02, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : FAX, transport of demodulated facsimile data %s",
+ bigbuf,
+ (oct & 0x02) ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x01, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : A/mu-law, interpretation of generic PCM coding: %s-law",
+ bigbuf,
+ (oct & 0x01) ? "mu" : "A");
+
+ curr_offset++;
+
+ value = tvb_get_ntohs(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 2,
+ "Maximum length of frame mode data (%d)",
+ value);
+
+ curr_offset += 2;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.7
+ */
+static void
+dis_field_multirate_service(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint32 value;
+ guint8 oct;
+ proto_item *item;
+ proto_tree *subtree;
+
+ curr_offset = *offset;
+
+#define FIELD_MULTIRATE_SERVICE_LEN 3
+
+ SHORT_DATA_CHECK(*len, FIELD_MULTIRATE_SERVICE_LEN);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, FIELD_MULTIRATE_SERVICE_LEN, field_strings[FIELD_MULTIRATE_SERVICE]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_MULTIRATE_SERVICE]);
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ my_decode_bitfield_value(bigbuf, oct, 0x80, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : FRM, transport of frame mode data %s",
+ bigbuf,
+ (oct & 0x80) ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x60, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ my_decode_bitfield_value(bigbuf, oct, 0x1f, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Multiplier (%d) for n x 64 kbit/s",
+ bigbuf,
+ oct & 0x1f);
+
+ curr_offset++;
+
+ value = tvb_get_ntohs(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 2,
+ "Maximum length of frame mode data (%d)",
+ value);
+
+ curr_offset += 2;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.8
+ */
+static void
+dis_field_seg_reassembly_ass(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint32 value;
+ proto_item *item;
+ proto_tree *subtree;
+
+ curr_offset = *offset;
+
+#define FIELD_SEG_REASSEMBLY_ASS_LEN 14
+
+ SHORT_DATA_CHECK(*len, FIELD_SEG_REASSEMBLY_ASS_LEN);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, FIELD_SEG_REASSEMBLY_ASS_LEN, field_strings[FIELD_SEG_REASSEMBLY_ASS]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_SEG_REASSEMBLY_ASS]);
+
+ value = tvb_get_ntoh24(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 3,
+ "Maximum length of SSSAR-SDU in the forward direction (%d)",
+ value);
+
+ curr_offset += 3;
+
+ value = tvb_get_ntoh24(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 3,
+ "Maximum length of SSSAR-SDU in the backward direction (%d)",
+ value);
+
+ curr_offset += 3;
+
+ value = tvb_get_ntohs(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 2,
+ "Maximum length of SSCOP-SDU in the forward direction (%d)",
+ value);
+
+ curr_offset += 2;
+
+ value = tvb_get_ntohs(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 2,
+ "Maximum length of SSCOP-SDU in the backward direction (%d)",
+ value);
+
+ curr_offset += 2;
+
+ value = tvb_get_ntohs(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 2,
+ "Maximum length of SSCOP-UU in the forward direction (%d)",
+ value);
+
+ curr_offset += 2;
+
+ value = tvb_get_ntohs(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 2,
+ "Maximum length of SSCOP-UU in the backward direction (%d)",
+ value);
+
+ curr_offset += 2;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.9
+ */
+static void
+dis_field_seg_reassembly_unass(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint32 value;
+ guint8 oct;
+ proto_item *item;
+ proto_tree *subtree;
+
+ curr_offset = *offset;
+
+#define FIELD_SEG_REASSEMBLY_UNASS_LEN 7
+
+ SHORT_DATA_CHECK(*len, FIELD_SEG_REASSEMBLY_UNASS_LEN);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, FIELD_SEG_REASSEMBLY_UNASS_LEN, field_strings[FIELD_SEG_REASSEMBLY_UNASS]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_SEG_REASSEMBLY_UNASS]);
+
+ value = tvb_get_ntoh24(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 3,
+ "Maximum length of SSSAR-SDU in the forward direction (%d)",
+ value);
+
+ curr_offset += 3;
+
+ value = tvb_get_ntoh24(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 3,
+ "Maximum length of SSSAR-SDU in the backward direction (%d)",
+ value);
+
+ curr_offset += 3;
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ my_decode_bitfield_value(bigbuf, oct, 0x80, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : TED, transmission error detection %s",
+ bigbuf,
+ oct & 0x80 ? "enabled" : "disabled");
+
+ my_decode_bitfield_value(bigbuf, oct, 0x7f, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ curr_offset++;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.10
+ */
+static void
+dis_field_served_user_gen_ref(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint32 value;
+
+ curr_offset = *offset;
+
+#define FIELD_SERVED_USER_GEN_REF_LEN 4
+
+ SHORT_DATA_CHECK(*len, FIELD_SERVED_USER_GEN_REF_LEN);
+
+ value = tvb_get_ntohl(tvb, curr_offset);
+
+ proto_tree_add_uint(tree, hf_alcap_served_user_gen_ref, tvb,
+ curr_offset, FIELD_SERVED_USER_GEN_REF_LEN, value);
+
+ curr_offset += FIELD_SERVED_USER_GEN_REF_LEN;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.11
+ */
+static void
+dis_field_cps_sdu_bit_rate(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean maximum)
+{
+ guint32 curr_offset;
+ guint32 value;
+ proto_item *item;
+ proto_tree *subtree;
+
+ curr_offset = *offset;
+
+#define FIELD_CPS_SDU_BIT_RATE_LEN 4
+
+ SHORT_DATA_CHECK(*len, FIELD_CPS_SDU_BIT_RATE_LEN);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, FIELD_CPS_SDU_BIT_RATE_LEN, field_strings[FIELD_MAX_CPS_SDU_BIT_RATE + (maximum ? 0 : 1)]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_MAX_CPS_SDU_BIT_RATE + (maximum ? 0 : 1)]);
+
+ value = tvb_get_ntohs(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 2,
+ "CPS-SDU bit rate in the forward direction (%d)",
+ value);
+
+ curr_offset += 2;
+
+ value = tvb_get_ntohs(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 2,
+ "CPS-SDU bit rate in the backward direction (%d)",
+ value);
+
+ curr_offset += 2;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.12
+ */
+static void
+dis_field_cps_sdu_size(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean maximum)
+{
+ guint32 curr_offset;
+ guint8 oct;
+ proto_item *item;
+ proto_tree *subtree;
+
+ curr_offset = *offset;
+
+#define FIELD_CPS_SDU_SIZE_LEN 2
+
+ SHORT_DATA_CHECK(*len, FIELD_CPS_SDU_SIZE_LEN);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, FIELD_CPS_SDU_SIZE_LEN, field_strings[FIELD_MAX_CPS_SDU_SIZE + (maximum ? 0 : 1)]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_MAX_CPS_SDU_SIZE + (maximum ? 0 : 1)]);
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 1,
+ "CPS-SDU size in the forward direction (%d)",
+ oct);
+
+ curr_offset++;
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 1,
+ "CPS-SDU size in the backward direction (%d)",
+ oct);
+
+ curr_offset++;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.13
+ */
+static void
+dis_field_nature_of_address(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ guint32 value;
+ guint8 oct;
+ proto_item *item;
+ proto_tree *subtree;
+ gchar *str = NULL;
+
+ curr_offset = *offset;
+
+#define FIELD_NATURE_OF_ADDRESS_LEN 1
+
+ SHORT_DATA_CHECK(*len, FIELD_NATURE_OF_ADDRESS_LEN);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, FIELD_NATURE_OF_ADDRESS_LEN, field_strings[FIELD_NATURE_OF_ADDRESS]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_NATURE_OF_ADDRESS]);
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ my_decode_bitfield_value(bigbuf, oct, 0x80, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ value = oct & 0x7f;
+
+ switch (value)
+ {
+ case 0x00: str = "spare"; break;
+ case 0x01: str = "subscriber number (national use)"; break;
+ case 0x02: str = "unknown (national use)"; break;
+ case 0x03: str = "national (significant) number"; break;
+ case 0x04: str = "international number"; break;
+ case 0x05: str = "network-specific number (national use)"; break;
+ default:
+ if ((value >= 0x06) && (value <= 0x6f)) { str = "spare"; break; }
+ else if ((value >= 0x70) && (value <= 0xfe)) { str = "reserved for national use"; break; }
+ else { str = "not given in spec. ???"; break; }
+ }
+
+ my_decode_bitfield_value(bigbuf, oct, 0x7f, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Nature of address code, %s (%d)",
+ bigbuf,
+ str,
+ value);
+
+ curr_offset++;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.14
+ */
+static void
+dis_field_e164_address(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ proto_item *item;
+ proto_tree *subtree;
+ guint8 parm_len;
+ guint8 oct;
+ guint8 i;
+
+ curr_offset = *offset;
+
+ SHORT_DATA_CHECK(*len, 1);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, -1, field_strings[FIELD_E164_ADDRESS]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_E164_ADDRESS]);
+
+ parm_len = tvb_get_guint8(tvb, curr_offset);
+
+ proto_item_set_len(item, parm_len + 1);
+
+ proto_tree_add_uint(subtree, hf_alcap_length, tvb, curr_offset, 1, parm_len);
+
+ curr_offset++;
+
+ if (parm_len > 0)
+ {
+ i=0;
+ while (i < parm_len)
+ {
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ my_decode_bitfield_value(bigbuf, oct, 0xf0, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ bigbuf2[i] = (oct & 0x0f) + 0x30;
+
+ my_decode_bitfield_value(bigbuf, oct, 0x0f, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Digit %d of address (%d)",
+ bigbuf,
+ i+1,
+ oct & 0x0f);
+
+ curr_offset++;
+ i++;
+ }
+
+ bigbuf2[i] = '\0';
+
+ proto_item_append_text(item, " (%s)", bigbuf2);
+ }
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.15
+ */
+static void
+dis_field_nsap_address(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+
+ curr_offset = *offset;
+
+#define FIELD_NSAP_ADDRESS_LEN 20
+
+ SHORT_DATA_CHECK(*len, FIELD_NSAP_ADDRESS_LEN);
+
+ proto_tree_add_item(tree, hf_alcap_nsap_address, tvb,
+ curr_offset, FIELD_NSAP_ADDRESS_LEN, FALSE);
+
+ curr_offset += FIELD_NSAP_ADDRESS_LEN;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.16
+ */
+static void
+dis_field_cause_value(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean *compat)
+{
+ guint32 curr_offset;
+ guint8 oct;
+ proto_item *item;
+ proto_tree *subtree;
+ gchar *str = NULL;
+
+ *compat = FALSE;
+ curr_offset = *offset;
+
+#define FIELD_CAUSE_VALUE_LEN 2
+
+ SHORT_DATA_CHECK(*len, FIELD_CAUSE_VALUE_LEN);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, FIELD_CAUSE_VALUE_LEN, field_strings[FIELD_CAUSE_VALUE]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_CAUSE_VALUE]);
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ my_decode_bitfield_value(bigbuf, oct, 0xfc, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ switch (oct & 0x3)
+ {
+ case 0x00: str = "ITU-T standardized coding as described in ITU-T Rec. Q.850 and Q.2610"; break;
+ case 0x01: str = "ISO/IEC standard"; break;
+ case 0x02: str = "national standard"; break;
+ case 0x03: str = "standard defined for the network (either public or private) present on the network side of the interface"; break;
+ }
+
+ my_decode_bitfield_value(bigbuf, oct, 0x03, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Coding standard, %s",
+ bigbuf,
+ str);
+
+ curr_offset++;
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ my_decode_bitfield_value(bigbuf, oct, 0x80, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Reserved",
+ bigbuf);
+
+ switch (oct & 0x7f)
+ {
+ case 1: str = "Unallocated (unassigned) number"; break;
+ case 3: str = "No route to destination"; break;
+ case 31: str = "Normal, unspecified"; break;
+ case 34: str = "No circuit/channel available"; break;
+ case 38: str = "Network out of order"; break;
+ case 41: str = "Temporary failure"; break;
+ case 42: str = "Switching equipment congestion"; break;
+ case 44: str = "Requested circuit/channel not available"; break;
+ case 47: str = "Resource unavailable, unspecified"; break;
+ case 93: str = "AAL parameters cannot be supported"; break;
+ case 95: str = "Invalid message, unspecified"; break;
+ case 96: str = "Mandatory information element is missing"; break;
+ case 97: str = "Message type non-existent or not implemented"; *compat = TRUE; break;
+ case 99: str = "Information element/parameter non-existent or not implemented"; *compat = TRUE; break;
+ case 100: str = "Invalid information element contents"; break;
+ case 102: str = "Recovery on timer expiry"; break;
+ case 110: str = "Message with unrecognized parameter, discarded"; *compat = TRUE; break;
+ default: str = "Unknown"; break;
+ }
+
+ my_decode_bitfield_value(bigbuf, oct, 0x7f, 8);
+ proto_tree_add_text(subtree, tvb,
+ curr_offset, 1,
+ "%s : Cause (%d), %s",
+ bigbuf,
+ oct & 0x7f,
+ str);
+
+ curr_offset++;
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.17
+ */
+static void
+dis_field_diagnostics(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean compat)
+{
+ guint32 curr_offset;
+ guint8 oct;
+ proto_item *item;
+ proto_tree *subtree;
+ guint8 parm_len;
+ gchar *str = NULL;
+ gint idx;
+ guint8 i;
+
+ curr_offset = *offset;
+
+ SHORT_DATA_CHECK(*len, 1);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, -1, field_strings[FIELD_DIAGNOSTICS]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_DIAGNOSTICS]);
+
+ parm_len = tvb_get_guint8(tvb, curr_offset);
+
+ proto_item_set_len(item, parm_len + 1);
+
+ proto_tree_add_uint(subtree, hf_alcap_length, tvb, curr_offset, 1, parm_len);
+
+ curr_offset++;
+
+ if (parm_len > 0)
+ {
+ if (compat)
+ {
+ /*
+ * compatibility diagnostics
+ */
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ str = my_match_strval(oct, msg_type_strings, &idx);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 1, (str == NULL) ? "Unknown message identifier" : str);
+
+ curr_offset++;
+
+ i=1;
+ while ((i+2) <= parm_len)
+ {
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ str = my_match_strval(oct, msg_parm_strings, &idx);
+
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 1, (str == NULL) ? "Unknown parameter" : str);
+
+ curr_offset++;
+
+ oct = tvb_get_guint8(tvb, curr_offset);
+
+ if (oct == 0)
+ {
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 1, "Whole parameter");
+ }
+ else
+ {
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, 1, "Field number %d", oct);
+ }
+
+ curr_offset++;
+ i += 2;
+ }
+
+ if (i != parm_len)
+ {
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, parm_len - i, "Extraneous Data ???");
+
+ curr_offset += (parm_len - i);
+ }
+ }
+ else
+ {
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, parm_len, "Coded as per ITU-T Rec. Q.2610");
+
+ curr_offset += parm_len;
+ }
+ }
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.4.18
+ */
+static void
+dis_field_served_user_transport(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
+{
+ guint32 curr_offset;
+ proto_item *item;
+ proto_tree *subtree;
+ guint8 parm_len;
+
+ curr_offset = *offset;
+
+ SHORT_DATA_CHECK(*len, 1);
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, -1, field_strings[FIELD_SERVED_USER_TRANSPORT]);
+
+ subtree = proto_item_add_subtree(item, ett_fields[FIELD_SERVED_USER_TRANSPORT]);
+
+ parm_len = tvb_get_guint8(tvb, curr_offset);
+
+ proto_item_set_len(item, parm_len + 1);
+
+ proto_tree_add_uint(subtree, hf_alcap_length, tvb, curr_offset, 1, parm_len);
+
+ curr_offset++;
+
+ if (parm_len > 0)
+ {
+ proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
+ curr_offset, parm_len, "Value");
+
+ curr_offset += parm_len;
+ }
+
+ *len -= (curr_offset - *offset);
+ *offset = curr_offset;
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.1
+ */
+static void
+dis_parm_cause(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+ gboolean compat;
+
+ dis_field_cause_value(tvb, tree, &len, &curr_offset, &compat);
+
+ dis_field_diagnostics(tvb, tree, &len, &curr_offset, compat);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.2
+ */
+static void
+dis_parm_conn_element_id(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_aal2_path_id(tvb, tree, &len, &curr_offset);
+
+ dis_field_channel_id(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.3
+ */
+static void
+dis_parm_dest_e164_sea(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_nature_of_address(tvb, tree, &len, &curr_offset);
+
+ dis_field_e164_address(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.4
+ */
+static void
+dis_parm_dest_nsap_sea(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_nsap_address(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.5
+ */
+static void
+dis_parm_link_characteristics(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_cps_sdu_bit_rate(tvb, tree, &len, &curr_offset, TRUE);
+
+ dis_field_cps_sdu_bit_rate(tvb, tree, &len, &curr_offset, FALSE);
+
+ dis_field_cps_sdu_size(tvb, tree, &len, &curr_offset, TRUE);
+
+ dis_field_cps_sdu_size(tvb, tree, &len, &curr_offset, FALSE);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.6
+ */
+static void
+dis_parm_osai(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_signalling_assoc_id(tvb, tree, &len, &curr_offset, FALSE);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.7
+ */
+static void
+dis_parm_served_user_gen_ref(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_served_user_gen_ref(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.8
+ */
+static void
+dis_parm_served_user_transport(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_served_user_transport(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.9
+ */
+static void
+dis_parm_service_specific_info_audio(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_audio_service(tvb, tree, &len, &curr_offset);
+
+ dis_field_organizational_unique_id(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.10
+ */
+static void
+dis_parm_service_specific_info_multirate(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_multirate_service(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.11
+ */
+static void
+dis_parm_service_specific_info_ass(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_seg_reassembly_ass(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+/*
+ * Ref. ITU-T Q.2630.1 (12/1999)
+ * Section 7.3.12
+ */
+static void
+dis_parm_service_specific_info_unass(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
+{
+
+ dis_field_seg_reassembly_unass(tvb, tree, &len, &curr_offset);
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+static const value_string msg_parm_strings[] = {
+ { 1, "Cause (CAU)" },
+ { 2, "Connection element identifier (CEID)" },
+ { 3, "Destination E.164 service endpoint address (ESEA)" },
+ { 4, "Destination NSAP service endpoint address (NSEA)" },
+ { 5, "Link characteristics (ALC)" },
+ { 6, "Originating signalling association identifier (OSAID)" },
+ { 7, "Served user generated reference (SUGR)" },
+ { 8, "Served user transport (SUT)" },
+ { 9, "Service specific information (audio) (SSIA)" },
+ { 10, "Service specific information (multirate) (SSIM)" },
+ { 11, "Service specific information (SAR-assured) (SSISA)" },
+ { 12, "Service specific information (SAR-unassured) (SSISU)" },
+ { 13, "Test connection identifier (TCI)" },
+ { 0, NULL },
+};
+#define NUM_PARMS (sizeof(msg_parm_strings)/sizeof(value_string))
+static gint ett_parms[NUM_PARMS];
+static void (*alcap_parm_fcn[])(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 offset) = {
+ dis_parm_cause, /* Cause */
+ dis_parm_conn_element_id, /* Connection element identifier */
+ dis_parm_dest_e164_sea, /* Destination E.164 service endpoint address */
+ dis_parm_dest_nsap_sea, /* Destination NSAP service endpoint address */
+ dis_parm_link_characteristics, /* Link characteristics */
+ dis_parm_osai, /* Originating signalling association identifier */
+ dis_parm_served_user_gen_ref, /* Served user generated reference */
+ dis_parm_served_user_transport, /* Served user transport */
+ dis_parm_service_specific_info_audio, /* Service specific information (audio) */
+ dis_parm_service_specific_info_multirate, /* Service specific information (multirate) */
+ dis_parm_service_specific_info_ass, /* Service specific information (SAR-assured) */
+ dis_parm_service_specific_info_unass, /* Service specific information (SAR-unassured) */
+ NULL /* no parms */, /* Test connection identifier */
+ NULL, /* NONE */
+};
+
+/* GENERIC ALCAP DISSECTOR FUNCTIONS */
+
+static void
+dissect_alcap_parms(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint32 len)
+{
+ void (*parm_fcn)(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 offset) = NULL;
+ guint8 parm;
+ guint8 parm_len;
+ guint32 curr_offset, saved_offset;
+ gint idx;
+ gchar *str = NULL;
+ proto_item *item;
+ proto_tree *subtree;
+ gint ett_parm_idx;
+
+
+ curr_offset = offset;
+
+ while (len >= ALCAP_PARM_HEADER_LEN)
+ {
+ saved_offset = curr_offset;
+
+ parm = tvb_get_guint8(tvb, curr_offset);
+
+ str = my_match_strval(parm, msg_parm_strings, &idx);
+
+ if (str == NULL)
+ {
+ ett_parm_idx = ett_parm;
+ parm_fcn = NULL;
+ }
+ else
+ {
+ ett_parm_idx = ett_parms[idx];
+ parm_fcn = alcap_parm_fcn[idx];
+ }
+
+ item =
+ proto_tree_add_none_format(tree, hf_alcap_none, tvb,
+ curr_offset, -1, (str == NULL) ? "Unknown parameter" : str);
+
+ subtree = proto_item_add_subtree(item, ett_parm_idx);
+
+ proto_tree_add_uint(subtree, hf_alcap_parm_id, tvb,
+ curr_offset, 1, parm);
+
+ curr_offset++;
+
+ dis_field_compatibility(tvb, subtree, &curr_offset, FALSE);
+
+ parm_len = tvb_get_guint8(tvb, curr_offset);
+
+ proto_tree_add_uint(subtree, hf_alcap_length, tvb, curr_offset, 1, parm_len);
+
+ curr_offset++;
+
+ proto_item_set_len(item, (curr_offset - saved_offset) + parm_len);
+
+ if (parm_len > 0)
+ {
+ if (parm_fcn == NULL)
+ {
+ proto_tree_add_none_format(subtree, hf_alcap_none,
+ tvb, curr_offset, parm_len, "Parameter data");
+ }
+ else
+ {
+ (*parm_fcn)(tvb, subtree, parm_len, curr_offset);
+ }
+ }
+
+ len -= (ALCAP_PARM_HEADER_LEN + parm_len);
+ curr_offset += parm_len;
+ }
+
+ EXTRANEOUS_DATA_CHECK(len, 0);
+}
+
+static void
+dissect_alcap_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *alcap_tree)
+{
+ guint32 temp_len;
+ guint32 len;
+ guint32 offset;
+ guint8 msg_type;
+ gint idx;
+ gchar *str = NULL;
+
+ offset = 0;
+
+ len = tvb_length(tvb);
+ temp_len = len;
+
+ if (len < ALCAP_MSG_HEADER_LEN)
+ {
+ proto_tree_add_none_format(alcap_tree, hf_alcap_none, tvb,
+ offset, len, "Message header too short");
+
+ return;
+ }
+
+ dis_field_signalling_assoc_id(tvb, alcap_tree, &temp_len, &offset, TRUE);
+
+ msg_type = tvb_get_guint8(tvb, offset);
+
+ str = my_match_strval(msg_type, msg_type_strings, &idx);
+
+ if (str == NULL)
+ {
+ proto_tree_add_none_format(alcap_tree, hf_alcap_none, tvb,
+ offset, 1, "Unknown message identifier");
+
+ return;
+ }
+
+ if (check_col(pinfo->cinfo, COL_INFO))
+ {
+ col_set_str(pinfo->cinfo, COL_INFO, str);
+ }
+
+ proto_tree_add_uint(alcap_tree, hf_alcap_msg_type, tvb,
+ offset, 1, msg_type);
+
+ offset++;
+
+ dis_field_compatibility(tvb, alcap_tree, &offset, TRUE);
+
+ if (len > ALCAP_MSG_HEADER_LEN)
+ {
+ dissect_alcap_parms(tvb, alcap_tree, offset, len - ALCAP_MSG_HEADER_LEN);
+ }
+}
+
+static void
+dissect_alcap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+ proto_item *alcap_item;
+ proto_tree *alcap_tree = NULL;
+
+ if (!proto_is_protocol_enabled(proto_alcap))
+ {
+ call_dissector(data_handle,tvb, pinfo, tree);
+ return;
+ }
+
+ g_pinfo = pinfo;
+
+ /*
+ * Don't change the Protocol column on summary display
+ */
+ if (check_col(pinfo->cinfo, COL_PROTOCOL))
+ {
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, alcap_proto_name_short);
+ }
+
+ /* In the interest of speed, if "tree" is NULL, don't do any work not
+ * necessary to generate protocol tree items.
+ */
+ if (tree)
+ {
+ g_tree = tree;
+
+ /*
+ * create the ALCAP protocol tree
+ */
+ alcap_item =
+ proto_tree_add_protocol_format(tree, proto_alcap, tvb, 0, -1,
+ alcap_proto_name);
+
+ alcap_tree =
+ proto_item_add_subtree(alcap_item, ett_alcap);
+
+ dissect_alcap_message(tvb, pinfo, alcap_tree);
+ }
+}
+
+
+/* Register the protocol with Ethereal */
+void
+proto_register_alcap(void)
+{
+ guint i;
+
+ /* Setup list of header fields */
+ static hf_register_info hf[] =
+ {
+ { &hf_alcap_msg_type,
+ { "Message Type",
+ "alcap.msg_type",
+ FT_UINT8, BASE_DEC, VALS(msg_type_strings), 0,
+ "", HFILL }},
+ { &hf_alcap_dsaid,
+ { "Destination signalling association identifier",
+ "alcap.dsai",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "", HFILL }
+ },
+ { &hf_alcap_osaid,
+ { "Originating signalling association identifier",
+ "alcap.osai",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "", HFILL }
+ },
+ { &hf_alcap_aal2_path_id,
+ { "AAL2 path identifier",
+ "alcap.aal2_path_id",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "", HFILL }
+ },
+ { &hf_alcap_channel_id,
+ { "Channel identifier (CID)",
+ "alcap.channel_id",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "", HFILL }
+ },
+ { &hf_alcap_organizational_unique_id,
+ { "Organizational unique identifier (OUI)",
+ "alcap.organizational_unique_id",
+ FT_UINT24, BASE_DEC, NULL, 0,
+ "", HFILL }
+ },
+ { &hf_alcap_served_user_gen_ref,
+ { "Served user generated reference",
+ "alcap.served_user_gen_ref",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "", HFILL }
+ },
+ { &hf_alcap_nsap_address,
+ { "NSAP address",
+ "alcap.nsap_address",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ "", HFILL }
+ },
+ { &hf_alcap_parm_id,
+ { "Parameter identifier",
+ "alcap.param_id",
+ FT_UINT8, BASE_DEC, NULL, 0,
+ "", HFILL }},
+ { &hf_alcap_length,
+ { "Length", "alcap.len",
+ FT_UINT8, BASE_DEC, NULL, 0,
+ "", HFILL }
+ },
+ { &hf_alcap_none,
+ { "Subtree", "alcap.none",
+ FT_NONE, 0, 0, 0,
+ "", HFILL }
+ },
+ };
+
+ /* Setup protocol subtree array */
+#define NUM_INDIVIDUAL_PARMS 2
+ static gint *ett[NUM_INDIVIDUAL_PARMS+NUM_PARMS+NUM_FIELDS];
+
+ memset((void *) ett, 0, sizeof(ett));
+
+ ett[0] = &ett_alcap;
+ ett[1] = &ett_parm;
+
+ for (i=0; i < NUM_PARMS; i++)
+ {
+ ett_parms[i] = -1;
+ ett[NUM_INDIVIDUAL_PARMS+i] = &ett_parms[i];
+ }
+
+ for (i=0; i < NUM_FIELDS; i++)
+ {
+ ett_fields[i] = -1;
+ ett[NUM_INDIVIDUAL_PARMS+NUM_PARMS+i] = &ett_fields[i];
+ }
+
+ /* Register the protocol name and description */
+ proto_alcap =
+ proto_register_protocol(alcap_proto_name, alcap_proto_name_short, "alcap");
+
+ /* Required function calls to register the header fields and subtrees used */
+ proto_register_field_array(proto_alcap, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+}
+
+
+void
+proto_reg_handoff_alcap(void)
+{
+ dissector_handle_t alcap_handle;
+
+ alcap_handle = create_dissector_handle(dissect_alcap, proto_alcap);
+
+ dissector_add("mtp3.service_indicator", ALCAP_SI, alcap_handle);
+
+ data_handle = find_dissector("data");
+}
git.samba.org / obnox / wireshark / wip.git / commitdiff