/* packet-lapsat.c * * Routines for GMR-1 LAPSat dissection in wireshark. * * Link Access Procedures (LAP) for the Satellite Channel (LAPSat). * LAPSat is the protocol for signalling transfer between an Access * Terminal (MES) and a Gateway Station (GS) in the GeoMobile (GMR-1) network. * * Copyright (c) 2011 Sylvain Munaut * Inspired on LAPDm code by Duncan Salerno * * References: * [1] ETSI TS 101 376-4-6 V1.2.1 - GMR-1 04.006 * * Wireshark - Network traffic analyzer * By Gerald Combs * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" #include #include void proto_register_lapsat(void); void proto_reg_handoff_lapsat(void); static int proto_lapsat = -1; static reassembly_table lapsat_reassembly_table; static dissector_table_t lapsat_sapi_dissector_table; static dissector_handle_t data_handle; static gint ett_lapsat = -1; static gint ett_lapsat_address = -1; static gint ett_lapsat_control = -1; static gint ett_lapsat_fragment = -1; static gint ett_lapsat_fragments = -1; static int hf_lapsat_addr = -1; static int hf_lapsat_addr_sst = -1; static int hf_lapsat_addr_cr = -1; static int hf_lapsat_addr_sapi = -1; static int hf_lapsat_addr_si = -1; static int hf_lapsat_addr_lpd = -1; static int hf_lapsat_addr_lfi = -1; static int hf_lapsat_ctl = -1; static int hf_lapsat_ctl_ftype_i = -1; static int hf_lapsat_ctl_ftype_s_u = -1; static int hf_lapsat_ctl_s_ftype = -1; static int hf_lapsat_ctl_u_modifier_cmd = -1; static int hf_lapsat_ctl_u_modifier_resp = -1; static int hf_lapsat_ctl_n_r = -1; static int hf_lapsat_ctl_n_s = -1; static int hf_lapsat_ctl_p = -1; static int hf_lapsat_ctl_f = -1; static int hf_lapsat_ctl_mii = -1; static int hf_lapsat_payload_last_nibble = -1; static int hf_lapsat_len = -1; static int hf_lapsat_fragment_data = -1; static int hf_lapsat_fragments = -1; static int hf_lapsat_fragment = -1; static int hf_lapsat_fragment_overlap = -1; static int hf_lapsat_fragment_overlap_conflicts = -1; static int hf_lapsat_fragment_multiple_tails = -1; static int hf_lapsat_fragment_too_long_fragment = -1; static int hf_lapsat_fragment_error = -1; static int hf_lapsat_fragment_count = -1; static int hf_lapsat_reassembled_in = -1; static int hf_lapsat_reassembled_length = -1; #define LAPSAT_HEADER_LEN 3 #define LAPSAT_SAPI_RR_CC_MM 0 #define LAPSAT_SAPI_SMS 3 /* * Address field bits */ #define LAPSAT_SST 0x01 /* SACCH status bit */ #define LAPSAT_CR 0x02 /* Command/Response bit */ #define LAPSAT_SAPI_MSK 0x0c /* Service Access Point Identifier */ #define LAPSAT_SAPI_SHIFT 2 #define LAPSAT_SI 0x10 /* Segment Indicator */ #define LAPSAT_LPD_MSK 0x60 /* DL for LAPSat or SMS-CB */ #define LAPSAT_LPD_SHIFT 6 #define LAPSAT_LFI 0x80 /* Length Field Indicator */ static const value_string lapsat_addr_sst_vals[] = { { 0, "FACCH and all other messages" }, { 1, "SACCH message" }, { 0 , NULL } }; static const value_string lapsat_addr_sapi_vals[] = { { LAPSAT_SAPI_RR_CC_MM, "RR/MM/CC" }, { LAPSAT_SAPI_SMS, "SMS/SS" }, { 0, NULL } }; static const value_string lapsat_addr_lpd_vals[] = { { 0, "Normal GMR-1" }, { 1, "Cell broadcast service" }, { 0, NULL } }; static const value_string lapsat_addr_si_vals[] = { { 0, "Complete/Last Segment of L3 message" }, { 1, "Segment only" }, { 0, NULL } }; static const value_string lapsat_addr_lfi_vals[] = { { 0, "Length Field not present (all data valid)" }, { 1, "Length Field present" }, { 0, NULL } }; /* * Frame types */ #define LAPSAT_CTL_TYPE_S 0x001 #define LAPSAT_CTL_TYPE_U 0x003 #define LAPSAT_CTL_TYPE_S_U_MSK 0x003 #define LAPSAT_CTL_TYPE_I 0x000 #define LAPSAT_CTL_TYPE_I_MSK 0x001 static const value_string lapsat_ctl_ftype_vals[] = { { LAPSAT_CTL_TYPE_I, "Information frame" }, { LAPSAT_CTL_TYPE_S, "Supervisory frame" }, { LAPSAT_CTL_TYPE_U, "Unnumbered frame" }, { 0, NULL } }; /* * S-format frame types */ #define LAPSAT_CTL_S_FTYPE_MSK 0x00c #define LAPSAT_RR 0x000 #define LAPSAT_GREJ 0x008 static const value_string lapsat_ctl_s_ftype_vals[] = { { LAPSAT_RR >> 2, "Receiver ready" }, { LAPSAT_GREJ >> 2, "Group reject" }, { 0, NULL} }; /* * U-format modifiers */ #define LAPSAT_CTL_U_MODIFIER_MSK 0x18c #define LAPSAT_SABM 0x08c #define LAPSAT_DM 0x00c #define LAPSAT_DISC 0x100 #define LAPSAT_UA 0x180 #define LAPSAT_UI 0x000 static const value_string lapsat_ctl_u_modifier_vals_cmd[] = { { LAPSAT_SABM >> 2, "Set Asynchronous Balanced Mode" }, { LAPSAT_DISC >> 2, "Disconnect" }, { LAPSAT_UI >> 2, "Unnumbered Information" }, { 0, NULL} }; static const value_string lapsat_ctl_u_modifier_vals_resp[] = { { LAPSAT_DM >> 2, "Disconnected mode" }, { LAPSAT_UA >> 2, "Unnumbered Acknowledge" }, { 0, NULL} }; /* * Control fields */ #define LAPSAT_CTL_P_F 0x040 #define LAPSAT_CTL_MII 0x200 #define LAPSAT_CTL_N_R_MSK 0xf80 #define LAPSAT_CTL_N_R_SHIFT 7 #define LAPSAT_CTL_N_S_MSK 0x03e #define LAPSAT_CTL_N_S_SHIFT 1 /* * Fragment stuff */ static const value_string true_false_vals[] = { { 0, "False" }, { 1, "True" }, { 0, NULL }, }; static const fragment_items lapsat_frag_items = { /* Fragment subtrees */ &ett_lapsat_fragment, &ett_lapsat_fragments, /* Fragment fields */ &hf_lapsat_fragments, &hf_lapsat_fragment, &hf_lapsat_fragment_overlap, &hf_lapsat_fragment_overlap_conflicts, &hf_lapsat_fragment_multiple_tails, &hf_lapsat_fragment_too_long_fragment, &hf_lapsat_fragment_error, &hf_lapsat_fragment_count, /* Reassembled in field */ &hf_lapsat_reassembled_in, /* Reassembled length field */ &hf_lapsat_reassembled_length, /* Reassembled data field */ NULL, /* Tag */ "fragments" }; static void lapsat_defragment_init(void) { reassembly_table_init(&lapsat_reassembly_table, &addresses_reassembly_table_functions); } static void lapsat_defragment_cleanup(void) { reassembly_table_destroy(&lapsat_reassembly_table); } /* * Main dissection functions */ static guint16 dissect_control(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int is_response) { proto_tree *ctl_tree; proto_item *ctl_ti; guint16 ctl, poll_final; const char *frame_type; char *info; info = (char *)wmem_alloc(wmem_packet_scope(), 80); /* Grab complete control field */ ctl = tvb_get_ntohs(tvb, 1) >> 4; poll_final = ctl & LAPSAT_CTL_P_F; /* Generate small 'descriptive' text */ switch (ctl & LAPSAT_CTL_TYPE_S_U_MSK) { case LAPSAT_CTL_TYPE_S: /* * Supervisory frame. */ switch (ctl & LAPSAT_CTL_S_FTYPE_MSK) { case LAPSAT_RR: frame_type = "RR"; break; case LAPSAT_GREJ: frame_type = "GREJ"; break; default: frame_type = "Unknown"; break; } g_snprintf(info, 80, "S%s, func=%s, N(R)=%u", poll_final ? (is_response ? " F" : " P") : "", frame_type, (ctl & LAPSAT_CTL_N_R_MSK) >> LAPSAT_CTL_N_R_SHIFT); break; case LAPSAT_CTL_TYPE_U: /* * Unnumbered frame */ switch (ctl & LAPSAT_CTL_U_MODIFIER_MSK) { case LAPSAT_SABM: frame_type = (ctl & LAPSAT_CTL_MII) ? "SABM, MII=1" : "SABM, MII=0"; break; case LAPSAT_DM: frame_type = "DM"; break; case LAPSAT_DISC: frame_type = "DISC"; break; case LAPSAT_UA: frame_type = "UA"; break; case LAPSAT_UI: frame_type = "UI"; break; default: frame_type = "Unknown"; break; } g_snprintf(info, 80, "U%s, func=%s", poll_final ? (is_response ? " F" : " P") : "", frame_type); break; default: /* * Information frame */ g_snprintf(info, 80, "I%s, N(R)=%u, N(S)=%u", poll_final ? " P" : "", (ctl & LAPSAT_CTL_N_R_MSK) >> LAPSAT_CTL_N_R_SHIFT, (ctl & LAPSAT_CTL_N_S_MSK) >> LAPSAT_CTL_N_S_SHIFT); break; } /* Add info */ col_add_str(pinfo->cinfo, COL_INFO, info); /* Create item & subtree */ ctl_ti = proto_tree_add_uint_format_value( tree, hf_lapsat_ctl, tvb, 1, 2, (guint32)ctl, "%s (0x%03x)", info, ctl ); ctl_tree = proto_item_add_subtree(ctl_ti, ett_lapsat_control); /* Add all fields */ switch (ctl & LAPSAT_CTL_TYPE_S_U_MSK) { case LAPSAT_CTL_TYPE_S: /* * Supervisory frame. */ proto_tree_add_item(ctl_tree, hf_lapsat_ctl_ftype_s_u, tvb, 1, 2, ENC_BIG_ENDIAN); proto_tree_add_item(ctl_tree, hf_lapsat_ctl_s_ftype, tvb, 1, 2, ENC_BIG_ENDIAN); proto_tree_add_item(ctl_tree, hf_lapsat_ctl_n_r, tvb, 1, 2, ENC_BIG_ENDIAN); if (poll_final) proto_tree_add_item(ctl_tree, is_response ? hf_lapsat_ctl_f : hf_lapsat_ctl_p, tvb, 1, 2, ENC_BIG_ENDIAN); break; case LAPSAT_CTL_TYPE_U: /* * Unnumbered frame */ proto_tree_add_item(ctl_tree, hf_lapsat_ctl_ftype_s_u, tvb, 1, 2, ENC_BIG_ENDIAN); proto_tree_add_item(ctl_tree, is_response ? hf_lapsat_ctl_u_modifier_resp : hf_lapsat_ctl_u_modifier_cmd, tvb, 1, 2, ENC_BIG_ENDIAN); if (poll_final) proto_tree_add_item(ctl_tree, is_response ? hf_lapsat_ctl_f : hf_lapsat_ctl_p, tvb, 1, 2, ENC_BIG_ENDIAN); if (((ctl & LAPSAT_CTL_U_MODIFIER_MSK) == LAPSAT_SABM) && (ctl & LAPSAT_CTL_MII)) proto_tree_add_item(ctl_tree, hf_lapsat_ctl_mii, tvb, 1, 2, ENC_BIG_ENDIAN); break; default: /* * Information frame */ proto_tree_add_item(ctl_tree, hf_lapsat_ctl_ftype_i, tvb, 1, 2, ENC_BIG_ENDIAN); proto_tree_add_item(ctl_tree, hf_lapsat_ctl_n_r, tvb, 1, 2, ENC_BIG_ENDIAN); proto_tree_add_item(ctl_tree, hf_lapsat_ctl_n_s, tvb, 1, 2, ENC_BIG_ENDIAN); if (poll_final) proto_tree_add_item(ctl_tree, hf_lapsat_ctl_p, tvb, 1, 2, ENC_BIG_ENDIAN); break; } return ctl; } static int dissect_lapsat(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* dissector_data _U_) { proto_tree *lapsat_tree, *addr_tree; proto_item *lapsat_ti, *addr_ti; tvbuff_t *payload; guint8 addr, sapi, cr; guint16 control; unsigned int hlen, is_response = 0, plen; /* Check that there's enough data */ if (tvb_captured_length(tvb) < LAPSAT_HEADER_LEN) return 0; /* Set protocol column */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "LAPSat"); /* Grab a couple of fields */ addr = tvb_get_guint8(tvb, 0); sapi = (addr & LAPSAT_SAPI_MSK) >> LAPSAT_SAPI_SHIFT; cr = addr & LAPSAT_CR; if (pinfo->p2p_dir == P2P_DIR_RECV) { is_response = cr ? FALSE : TRUE; } else if (pinfo->p2p_dir == P2P_DIR_SENT) { is_response = cr ? TRUE : FALSE; } hlen = LAPSAT_HEADER_LEN; if (addr & LAPSAT_LFI) hlen++; /* FIXME if "S func=GREJ", extend */ /* Create LAPSat tree */ lapsat_ti = proto_tree_add_item(tree, proto_lapsat, tvb, 0, hlen, ENC_NA); lapsat_tree = proto_item_add_subtree(lapsat_ti, ett_lapsat); /* Dissect address field */ addr_ti = proto_tree_add_item(lapsat_tree, hf_lapsat_addr, tvb, 0, 1, ENC_BIG_ENDIAN); addr_tree = proto_item_add_subtree(addr_ti, ett_lapsat_address); proto_tree_add_item(addr_tree, hf_lapsat_addr_sst, tvb, 0, 1, ENC_BIG_ENDIAN); proto_tree_add_item(addr_tree, hf_lapsat_addr_cr, tvb, 0, 1, ENC_BIG_ENDIAN); proto_tree_add_item(addr_tree, hf_lapsat_addr_sapi, tvb, 0, 1, ENC_BIG_ENDIAN); proto_tree_add_item(addr_tree, hf_lapsat_addr_si, tvb, 0, 1, ENC_BIG_ENDIAN); proto_tree_add_item(addr_tree, hf_lapsat_addr_lpd, tvb, 0, 1, ENC_BIG_ENDIAN); proto_tree_add_item(addr_tree, hf_lapsat_addr_lfi, tvb, 0, 1, ENC_BIG_ENDIAN); /* Dissect control field */ control = dissect_control(tvb, pinfo, lapsat_tree, is_response); /* Last payload nibble */ proto_tree_add_item(lapsat_tree, hf_lapsat_payload_last_nibble, tvb, 2, 1, ENC_BIG_ENDIAN); /* Optional length field */ if (addr & LAPSAT_LFI) proto_tree_add_item(lapsat_tree, hf_lapsat_len, tvb, 3, 1, ENC_BIG_ENDIAN); /* If frame is "S func=GREJ", then add Na(R) & Nb(R) */ /* FIXME */ /* Get the payload */ plen = (addr & LAPSAT_LFI) ? tvb_get_guint8(tvb, 3) : tvb_captured_length(tvb) - hlen; if (!plen) return 3; /* No point in doing more if there is no payload */ DISSECTOR_ASSERT((plen + hlen) <= tvb_captured_length(tvb)); if ((plen + hlen) == tvb_captured_length(tvb)) { /* Need to integrate the last nibble */ guint8 *data = (guint8 *)tvb_memdup(NULL, tvb, hlen, plen); data[plen-1] |= tvb_get_guint8(tvb, 2) << 4; payload = tvb_new_child_real_data(tvb, data, plen, plen); tvb_set_free_cb(payload, g_free); } else { /* Last nibble doesn't need merging */ payload = tvb_new_subset(tvb, hlen, plen, -1); } add_new_data_source(pinfo, payload, "LAPSat Payload"); /* Handle fragments */ if ((control & LAPSAT_CTL_TYPE_I_MSK) == LAPSAT_CTL_TYPE_I) { /* * Potentially fragmented I frames */ fragment_head *fd_m = NULL; tvbuff_t *reassembled = NULL; guint32 fragment_id; gboolean save_fragmented = pinfo->fragmented; /* Is this a fragment ? */ pinfo->fragmented = !!(addr & LAPSAT_SI); /* Rely on caller to provide a way to group fragments */ fragment_id = (pinfo->circuit_id << 3) | (sapi << 1) | pinfo->p2p_dir; /* Fragment reconstruction helpers */ fd_m = fragment_add_seq_next( &lapsat_reassembly_table, payload, 0, pinfo, fragment_id, /* To group fragments */ NULL, plen, !!(addr & LAPSAT_SI) /* More fragment ? */ ); reassembled = process_reassembled_data( payload, 0, pinfo, "Reassembled LAPSat", fd_m, &lapsat_frag_items, NULL, lapsat_tree ); /* Reassembled into this packet ? */ if (fd_m && pinfo->fd->num == fd_m->reassembled_in) { /* Yes, so handoff to upper layers */ if (!dissector_try_uint(lapsat_sapi_dissector_table, sapi, reassembled, pinfo, tree)) call_dissector(data_handle, reassembled, pinfo, tree); } else { /* No, just add infos */ col_append_str(pinfo->cinfo, COL_INFO, " (Fragment)"); proto_tree_add_item(lapsat_tree, hf_lapsat_fragment_data, payload, 0, -1, ENC_NA); } /* Now reset fragmentation information in pinfo */ pinfo->fragmented = save_fragmented; } else { /* * Whole frame */ if (!dissector_try_uint(lapsat_sapi_dissector_table, sapi, payload, pinfo, tree)) call_dissector(data_handle, payload, pinfo, tree); } return tvb_captured_length(tvb); } void proto_register_lapsat(void) { static hf_register_info hf[] = { /* Address field */ { &hf_lapsat_addr, { "Address Field", "lapsat.address", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL }, }, { &hf_lapsat_addr_sst, { "SST", "lapsat.address.sst", FT_UINT8, BASE_DEC, VALS(lapsat_addr_sst_vals), LAPSAT_SST, "SACCH status bit", HFILL }, }, { &hf_lapsat_addr_cr, { "C/R", "lapsat.address.cr", FT_UINT8, BASE_DEC, NULL, LAPSAT_CR, "Command/response bit", HFILL }, }, { &hf_lapsat_addr_sapi, { "SAPI", "lapsat.address.sapi", FT_UINT8, BASE_DEC, VALS(lapsat_addr_sapi_vals), LAPSAT_SAPI_MSK, "Service access point identifier", HFILL }, }, { &hf_lapsat_addr_si, { "SI", "lapsat.address.si", FT_UINT8, BASE_DEC, VALS(lapsat_addr_si_vals), LAPSAT_SI, "Segment Indicator", HFILL }, }, { &hf_lapsat_addr_lpd, { "LPD", "lapsat.address.lpd", FT_UINT8, BASE_DEC, VALS(lapsat_addr_lpd_vals), LAPSAT_LPD_MSK, "Link Protocol Discriminator", HFILL }, }, { &hf_lapsat_addr_lfi, { "LFI", "lapsat.address.lfi", FT_UINT8, BASE_DEC, VALS(lapsat_addr_lfi_vals), LAPSAT_LFI, "Length Field Indicator", HFILL }, }, /* Control field */ { &hf_lapsat_ctl, { "Control Field", "lapsat.control_field", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } }, { &hf_lapsat_ctl_ftype_i, { "Frame type", "lapsat.control.ftype", FT_UINT16, BASE_DEC, VALS(lapsat_ctl_ftype_vals), LAPSAT_CTL_TYPE_I_MSK << 4, NULL, HFILL } }, { &hf_lapsat_ctl_ftype_s_u, { "Frame type", "lapsat.control.ftype", FT_UINT16, BASE_DEC, VALS(lapsat_ctl_ftype_vals), LAPSAT_CTL_TYPE_S_U_MSK << 4, NULL, HFILL } }, { &hf_lapsat_ctl_s_ftype, { "Supervisory frame type", "lapsat.control.s_ftype", FT_UINT16, BASE_DEC, VALS(lapsat_ctl_s_ftype_vals), LAPSAT_CTL_S_FTYPE_MSK << 4, NULL, HFILL } }, { &hf_lapsat_ctl_u_modifier_cmd, { "Command", "lapsat.control.u_modifier_cmd", FT_UINT16, BASE_HEX, VALS(lapsat_ctl_u_modifier_vals_cmd), LAPSAT_CTL_U_MODIFIER_MSK << 4, NULL, HFILL } }, { &hf_lapsat_ctl_u_modifier_resp, { "Response", "lapsat.control.u_modifier_resp", FT_UINT16, BASE_HEX, VALS(lapsat_ctl_u_modifier_vals_resp), LAPSAT_CTL_U_MODIFIER_MSK << 4, NULL, HFILL } }, { &hf_lapsat_ctl_n_r, { "N(R)", "lapsat.control.n_r", FT_UINT16, BASE_DEC, NULL, LAPSAT_CTL_N_R_MSK << 4, NULL, HFILL } }, { &hf_lapsat_ctl_n_s, { "N(S)", "lapsat.control.n_s", FT_UINT16, BASE_DEC, NULL, LAPSAT_CTL_N_S_MSK << 4, NULL, HFILL } }, { &hf_lapsat_ctl_p, { "Poll", "lapsat.control.p", FT_UINT16, BASE_DEC, VALS(true_false_vals), LAPSAT_CTL_P_F << 4, NULL, HFILL } }, { &hf_lapsat_ctl_f, { "Final", "lapsat.control.f", FT_UINT16, BASE_DEC, VALS(true_false_vals), LAPSAT_CTL_P_F << 4, NULL, HFILL } }, { &hf_lapsat_ctl_mii, { "MII", "lapsat.control.mii", FT_UINT16, BASE_DEC, VALS(true_false_vals), LAPSAT_CTL_MII << 4, "Mobile Identity Indicator", HFILL } }, /* Payload last nibble */ { &hf_lapsat_payload_last_nibble, { "Payload last nibble", "lapsat.payload.last_nibble", FT_UINT8, BASE_HEX, NULL, 0x0f, NULL, HFILL } }, /* Length field */ { &hf_lapsat_len, { "Length Field", "lapsat.length", FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL }, }, /* Fragment reassembly */ { &hf_lapsat_fragment_data, { "Fragment Data", "lapsat.fragment_data", FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_lapsat_fragments, { "Message fragments", "lapsat.fragments", FT_NONE, BASE_NONE, NULL, 0x00, "LAPSat Message fragments", HFILL } }, { &hf_lapsat_fragment, { "Message fragment", "lapsat.fragment", FT_FRAMENUM, BASE_NONE, NULL, 0x00, "LAPSat Message fragment", HFILL } }, { &hf_lapsat_fragment_overlap, { "Message fragment overlap", "lapsat.fragment.overlap", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "LAPSat Message fragment overlaps with other fragment(s)", HFILL } }, { &hf_lapsat_fragment_overlap_conflicts, { "Message fragment overlapping with conflicting data", "lapsat.fragment.overlap.conflicts", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "LAPSat Message fragment overlaps with conflicting data", HFILL } }, { &hf_lapsat_fragment_multiple_tails, { "Message has multiple tail fragments", "lapsat.fragment.multiple_tails", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "LAPSat Message fragment has multiple tail fragments", HFILL } }, { &hf_lapsat_fragment_too_long_fragment, { "Message fragment too long", "lapsat.fragment.too_long_fragment", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "LAPSat Message fragment data goes beyond the packet end", HFILL } }, { &hf_lapsat_fragment_error, { "Message defragmentation error", "lapsat.fragment.error", FT_FRAMENUM, BASE_NONE, NULL, 0x00, "LAPSat Message defragmentation error due to illegal fragments", HFILL } }, { &hf_lapsat_fragment_count, { "Message fragment count", "lapsat.fragment.count", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_lapsat_reassembled_in, { "Reassembled in", "lapsat.reassembled.in", FT_FRAMENUM, BASE_NONE, NULL, 0x00, "LAPSat Message has been reassembled in this packet.", HFILL } }, { &hf_lapsat_reassembled_length, { "Reassembled LAPSat length", "lapsat.reassembled.length", FT_UINT32, BASE_DEC, NULL, 0x00, "The total length of the reassembled payload", HFILL } }, }; static gint *ett[] = { &ett_lapsat, &ett_lapsat_address, &ett_lapsat_control, &ett_lapsat_fragment, &ett_lapsat_fragments, }; proto_lapsat = proto_register_protocol("Link Access Procedure, Satellite channel (LAPSat)", "LAPSat", "lapsat"); proto_register_field_array (proto_lapsat, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); register_dissector("lapsat", dissect_lapsat, proto_lapsat); lapsat_sapi_dissector_table = register_dissector_table("lapsat.sapi", "LAPSat SAPI", FT_UINT8, BASE_DEC, DISSECTOR_TABLE_NOT_ALLOW_DUPLICATE); register_init_routine (lapsat_defragment_init); register_cleanup_routine (lapsat_defragment_cleanup); } void proto_reg_handoff_lapsat(void) { data_handle = find_dissector("data"); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 8 * tab-width: 8 * indent-tabs-mode: t * End: * * vi: set shiftwidth=8 tabstop=8 noexpandtab: * :indentSize=8:tabSize=8:noTabs=false: */