diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
commit | e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc (patch) | |
tree | 68cb5ef9081156392f1dd62a00c6ccc1451b93df /epan/dissectors/packet-gmr1_dtap.c | |
parent | Initial commit. (diff) | |
download | wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.tar.xz wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.zip |
Adding upstream version 4.2.2.upstream/4.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'epan/dissectors/packet-gmr1_dtap.c')
-rw-r--r-- | epan/dissectors/packet-gmr1_dtap.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/epan/dissectors/packet-gmr1_dtap.c b/epan/dissectors/packet-gmr1_dtap.c new file mode 100644 index 00000000..914f7c35 --- /dev/null +++ b/epan/dissectors/packet-gmr1_dtap.c @@ -0,0 +1,188 @@ +/* packet-gmr1_dtap.c + * + * Routines for GMR-1 DTAP dissection in wireshark. + * Copyright (c) 2011 Sylvain Munaut <tnt@246tNt.com> + * + * References: + * [1] ETSI TS 101 376-4-8 V1.3.1 - GMR-1 04.008 + * [2] ETSI TS 101 376-4-8 V2.2.1 - GMPRS-1 04.008 + * [3] ETSI TS 101 376-4-8 V3.1.1 - GMR-1 3G 44.008 + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" + +#include <epan/packet.h> + +#include "packet-gmr1_common.h" + +void proto_register_gmr1_dtap(void); +void proto_reg_handoff_gmr1_dtap(void); + +/* GMR-1 DTAP proto */ +static int proto_gmr1_dtap = -1; + +static int hf_gmr1_dtap_protocol_discriminator = -1; +static int hf_gmr1_dtap_message_elements = -1; + +/* GMR-1 DTAP sub tree */ +static gint ett_gmr1_dtap = -1; +static gint ett_gmr1_pd = -1; + +/* Handoffs */ +static dissector_handle_t gsm_dtap_handle; +static dissector_handle_t dtap_handle; + + +static int +dissect_gmr1_dtap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + guint32 len, offset; + gmr1_msg_func_t msg_func; + const gchar *msg_str; + gint ett_tree; + int hf_idx; + proto_item *dtap_item = NULL/*, *pd_item = NULL*/; + proto_tree *dtap_tree = NULL/*, *pd_tree = NULL*/; + guint32 oct[2]; + guint8 pd; + + /* Scan init */ + len = tvb_captured_length(tvb); + offset = 0; + + /* Protocol descriptor */ + oct[0] = tvb_get_guint8(tvb, offset++); + + if ((oct[0] & GMR1_PD_EXT_MSK) == GMR1_PD_EXT_VAL) + pd = oct[0] & 0xff; + else + pd = oct[0] & 0x0f; + + /* HACK: Quick delegation hack to GSM */ + if (pd != GMR1_PD_RR) { + call_dissector(gsm_dtap_handle, tvb, pinfo, tree); + return tvb_captured_length(tvb); + } + + /* Fill up some info */ + col_append_str(pinfo->cinfo, COL_INFO, " (DTAP) "); + + col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", + val_to_str(pd, gmr1_pd_short_vals, "Unknown (%u)")); + + /* Get message parameters */ + oct[1] = tvb_get_guint8(tvb, offset); + + gmr1_get_msg_params((gmr1_pd_e)pd, oct[1], &msg_str, &ett_tree, &hf_idx, &msg_func); + + /* Create protocol tree */ + if (msg_str == NULL) + { + dtap_item = proto_tree_add_protocol_format( + tree, proto_gmr1_dtap, tvb, 0, len, + "GMR-1 DTAP - Message Type (0x%02x)", oct[1]); + dtap_tree = proto_item_add_subtree(dtap_item, ett_gmr1_dtap); + + col_append_fstr(pinfo->cinfo, COL_INFO, "Message Type (0x%02x) ", oct[1]); + } + else + { + dtap_item = proto_tree_add_protocol_format( + tree, proto_gmr1_dtap, tvb, 0, -1, + "GMR-1 DTAP - %s", msg_str); + dtap_tree = proto_item_add_subtree(dtap_item, ett_gmr1_dtap); + + col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", msg_str); + } + + /* Start over */ + offset = 0; + + /* Protocol discriminator item */ + /*pd_item =*/ proto_tree_add_uint( + dtap_tree, hf_gmr1_dtap_protocol_discriminator, tvb, 1, 1, pd); + + /*pd_tree = proto_item_add_subtree(pd_item, ett_gmr1_pd);*/ + + /* Move on */ + offset++; + + /* Message type - [1] 11.4 */ + proto_tree_add_uint_format( + dtap_tree, hf_idx, tvb, offset, 1, oct[1], + "Message Type: %s", msg_str ? msg_str : "(Unknown)" + ); + + offset++; + + /* Decode elements */ + if (msg_func) { + (*msg_func)(tvb, dtap_tree, pinfo, offset, len - offset); + } else { + proto_tree_add_item(dtap_tree, hf_gmr1_dtap_message_elements, tvb, offset, len - offset, ENC_NA); + } + + /* Done ! */ + return tvb_captured_length(tvb); +} + + +void +proto_register_gmr1_dtap(void) +{ + static hf_register_info hf[] = { + { &hf_gmr1_dtap_protocol_discriminator, + { "Protocol Discriminator", "gmr1.dtap.protocol_discriminator", + FT_UINT8, BASE_DEC, VALS(gmr1_pd_vals), 0x0, + NULL, HFILL } + }, + { &hf_gmr1_dtap_message_elements, + { "Message elements", "gmr1.dtap.message_elements", + FT_BYTES, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + }; + + static gint *ett[] = { + &ett_gmr1_dtap, + &ett_gmr1_pd, + }; + + /* Setup protocol subtree array */ + proto_register_subtree_array(ett, array_length(ett)); + + /* Register the protocol name and field description */ + proto_gmr1_dtap = proto_register_protocol("GEO-Mobile Radio (1) DTAP", "GMR-1 DTAP", "gmr1.dtap"); + proto_register_field_array(proto_gmr1_dtap, hf, array_length(hf)); + + /* Register dissector */ + dtap_handle = register_dissector("gmr1_dtap", dissect_gmr1_dtap, proto_gmr1_dtap); +} + +void +proto_reg_handoff_gmr1_dtap(void) +{ + dissector_add_uint("lapsat.sapi", 0 , dtap_handle); /* LAPSat: CC/RR/MM */ + dissector_add_uint("lapsat.sapi", 3 , dtap_handle); /* LAPSat: SMS/SS */ + + gsm_dtap_handle = find_dissector_add_dependency("gsm_a_dtap", proto_gmr1_dtap); +} + +/* + * Editor modelines - https://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: + */ |