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Diffstat (limited to 'epan/dissectors/packet-alcap.c')
| -rw-r--r-- | epan/dissectors/packet-alcap.c | 1774 |
1 files changed, 1774 insertions, 0 deletions
diff --git a/epan/dissectors/packet-alcap.c b/epan/dissectors/packet-alcap.c new file mode 100644 index 0000000000..92a4eb11c1 --- /dev/null +++ b/epan/dissectors/packet-alcap.c @@ -0,0 +1,1774 @@ +/* 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. + * + * $Id$ + * + * 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[] = { + { 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 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 */ + +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); + + other_decode_bitfield_value(bigbuf, compat, 0x80, 8); + proto_tree_add_text(subtree, tvb, + curr_offset, 1, + "%s : Reserved", + bigbuf); + + other_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; + } + + other_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); + + other_decode_bitfield_value(bigbuf, compat, 0x08, 8); + proto_tree_add_text(subtree, tvb, + curr_offset, 1, + "%s : Reserved", + bigbuf); + + other_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; + } + + other_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; + } + + other_decode_bitfield_value(bigbuf, oct, 0xc0, 8); + proto_tree_add_text(subtree, tvb, + curr_offset, 1, + "%s : Profile type, %s", + bigbuf, str); + + other_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); + + other_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"); + + other_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"); + + other_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"); + + other_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"); + + other_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"); + + other_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"); + + other_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"); + + other_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); + + other_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"); + + other_decode_bitfield_value(bigbuf, oct, 0x60, 8); + proto_tree_add_text(subtree, tvb, + curr_offset, 1, + "%s : Reserved", + bigbuf); + + other_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); + + other_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"); + + other_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); + + other_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; } + } + + other_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); + + other_decode_bitfield_value(bigbuf, oct, 0xf0, 8); + proto_tree_add_text(subtree, tvb, + curr_offset, 1, + "%s : Reserved", + bigbuf); + + bigbuf2[i] = (oct & 0x0f) + 0x30; + + other_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); + + other_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; + } + + other_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); + + other_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; + } + + other_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 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; + + 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"); +} |