139 lines
4.1 KiB
C
139 lines
4.1 KiB
C
/* Routines for sipfrag packet disassembly (RFC 3420)
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*
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* Martin Mathieson
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* Based on packet-sdp.c
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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/*
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* Doesn't do a detailed dissection of the lines of the message, just treat as text.
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*/
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void proto_register_sipfrag(void);
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/* Initialize the protocol and registered fields. */
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static int proto_sipfrag = -1;
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static int hf_sipfrag_line = -1;
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/* Protocol subtree. */
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static int ett_sipfrag = -1;
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void proto_reg_handoff_sipfrag(void);
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static dissector_handle_t sipfrag_handle;
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/* Main dissection function. */
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static int dissect_sipfrag(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *sipfrag_tree;
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proto_item *ti;
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gint offset = 0;
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gint next_offset;
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int linelen;
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char *string;
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gint lines = 0;
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/* Append this protocol name rather than replace. */
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col_append_str(pinfo->cinfo, COL_PROTOCOL, "/sipfrag");
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/* Add mention of this protocol to info column */
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col_append_str(pinfo->cinfo, COL_INFO, ", with Sipfrag");
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/* Create sipfrag tree. */
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ti = proto_tree_add_item(tree, proto_sipfrag, tvb, offset, -1, ENC_NA);
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sipfrag_tree = proto_item_add_subtree(ti, ett_sipfrag);
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/* Show the sipfrag message a line at a time. */
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while (tvb_offset_exists(tvb, offset))
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{
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/* Find the end of the line. */
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linelen = tvb_find_line_end_unquoted(tvb, offset, -1, &next_offset);
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/* For now, add all lines as unparsed strings */
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/* Extract & add the string. */
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string = (char*)tvb_get_string_enc(wmem_packet_scope(), tvb, offset, linelen, ENC_ASCII);
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proto_tree_add_string_format(sipfrag_tree, hf_sipfrag_line,
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tvb, offset,
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linelen, string,
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"%s", string);
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lines++;
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/* Show first line in info column */
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if (lines == 1) {
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col_append_fstr(pinfo->cinfo, COL_INFO, "(%s", string);
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}
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/* Move onto next line. */
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offset = next_offset;
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}
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/* Close off summary of sipfrag in info column */
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col_append_str(pinfo->cinfo, COL_INFO, (lines > 1) ? "...)" : ")");
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return tvb_captured_length(tvb);
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}
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void proto_register_sipfrag(void)
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{
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static hf_register_info hf[] =
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{
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{ &hf_sipfrag_line,
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{ "Line",
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"sipfrag.line",FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL
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}
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},
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};
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static gint *ett[] =
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{
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&ett_sipfrag
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};
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/* Register protocol. */
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proto_sipfrag = proto_register_protocol("Sipfrag", "SIPFRAG", "sipfrag");
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proto_register_field_array(proto_sipfrag, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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/* Allow other dissectors to find this one by name. */
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sipfrag_handle = register_dissector("sipfrag", dissect_sipfrag, proto_sipfrag);
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}
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void proto_reg_handoff_sipfrag(void)
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{
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dissector_add_string("media_type", "message/sipfrag", sipfrag_handle);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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