forked from osmocom/wireshark
143 lines
3.9 KiB
C
143 lines
3.9 KiB
C
/* packet-msn-messenger.c
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* Routines for MSN Messenger Service packet dissection
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* Copyright 2003, Chris Waters <chris@waters.co.nz>
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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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* Copied from packet-pop.c
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/strutil.h>
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void proto_register_msnms(void);
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void proto_reg_handoff_msnms(void);
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/*
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* The now-expired Internet-Draft for the MSN Messenger 1.0 protocol
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* can, as of the time of the writing of this comment, be found at:
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*
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* http://praya.sourceforge.net/draft-movva-msn-messenger-protocol-00.txt
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*
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* http://mono.es.gnome.org/imsharp/tutoriales/msn/appendixa.html
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*
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* http://www.hypothetic.org/docs/msn/ietf_draft.php
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*
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* http://babble.wundsam.net/docs/protocol-msn-im.txt
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*
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* Note that it's Yet Another FTP-Like Command/Response Protocol,
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* so it arguably should be dissected as such, although you do have
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* to worry about the MSG command, as only the first line of it
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* should be parsed as a command, the rest should be parsed as the
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* message body. We therefore leave "hf_msnms_command", "tokenlen",
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* and "next_token", even though they're unused, as reminders that
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* this should be done.
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*/
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static int proto_msnms = -1;
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/* static int hf_msnms_command = -1; */
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static gint ett_msnms = -1;
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#define TCP_PORT_MSNMS 1863
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static int
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dissect_msnms(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *msnms_tree;
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proto_item *ti;
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gint offset = 0;
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const guchar *line;
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gint next_offset;
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int linelen;
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/* int tokenlen; */
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/* const guchar *next_token; */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "MSNMS");
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/*
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* Find the end of the first line.
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*
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* Note that "tvb_find_line_end()" will return a value that is
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* not longer than what's in the buffer, so the "tvb_get_ptr()"
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* call won't throw an exception.
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*/
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linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
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line = tvb_get_ptr(tvb, offset, linelen);
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/*
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* Put the first line from the buffer into the summary.
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*/
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col_add_str(pinfo->cinfo, COL_INFO,
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format_text(pinfo->pool, line, linelen));
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if (tree) {
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ti = proto_tree_add_item(tree, proto_msnms, tvb, offset, -1,
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ENC_NA);
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msnms_tree = proto_item_add_subtree(ti, ett_msnms);
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/*
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* Show the rest of the packet as text,
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* a line at a time.
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*/
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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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*/
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tvb_find_line_end(tvb, offset, -1,
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&next_offset, FALSE);
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/*
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* Put this line.
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*/
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proto_tree_add_format_text(msnms_tree, tvb, offset, next_offset - offset);
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offset = next_offset;
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}
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}
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return tvb_captured_length(tvb);
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}
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void
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proto_register_msnms(void)
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{
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static gint *ett[] = {
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&ett_msnms,
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};
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proto_msnms = proto_register_protocol("MSN Messenger Service", "MSNMS", "msnms");
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_msnms(void)
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{
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dissector_handle_t msnms_handle;
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msnms_handle = create_dissector_handle(dissect_msnms, proto_msnms);
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dissector_add_uint_with_preference("tcp.port", TCP_PORT_MSNMS, msnms_handle);
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/*
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* For MSN Messenger Protocol over HTTP
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*/
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dissector_add_string("media_type", "application/x-msn-messenger", msnms_handle);
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}
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/*
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* Editor modelines - https://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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