![Jörg Mayer](/assets/img/avatar_default.png)
winapi_cleanup tool written by Patrik Stridvall for the wine project. svn path=/trunk/; revision=6117
838 lines
21 KiB
C
838 lines
21 KiB
C
/* packet-rtsp.c
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* Routines for RTSP packet disassembly (RFC 2326)
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*
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* Jason Lango <jal@netapp.com>
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* Liberally copied from packet-http.c, by Guy Harris <guy@alum.mit.edu>
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*
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* $Id: packet-rtsp.c,v 1.50 2002/08/28 21:00:30 jmayer Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include "packet-rtp.h"
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#include "packet-rtcp.h"
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#include <epan/conversation.h>
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#include <epan/strutil.h>
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static int proto_rtsp = -1;
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static gint ett_rtsp = -1;
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static gint ett_rtspframe = -1;
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static int hf_rtsp_method = -1;
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static int hf_rtsp_url = -1;
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static int hf_rtsp_status = -1;
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static dissector_handle_t sdp_handle;
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static dissector_handle_t rtp_handle;
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static dissector_handle_t rtcp_handle;
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static GMemChunk *rtsp_vals = NULL;
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#define rtsp_hash_init_count 20
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#define TCP_PORT_RTSP 554
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/*
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* Takes an array of bytes, assumed to contain a null-terminated
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* string, as an argument, and returns the length of the string -
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* i.e., the size of the array, minus 1 for the null terminator.
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*/
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#define STRLEN_CONST(str) (sizeof (str) - 1)
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#define RTSP_FRAMEHDR ('$')
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typedef struct {
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dissector_handle_t dissector;
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} rtsp_interleaved_t;
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#define RTSP_MAX_INTERLEAVED (8)
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/*
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* Careful about dynamically allocating memory in this structure (say
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* for dynamically increasing the size of the 'interleaved' array) -
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* the containing structure is garbage collected and contained
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* pointers will not be freed.
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*/
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typedef struct {
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rtsp_interleaved_t interleaved[RTSP_MAX_INTERLEAVED];
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} rtsp_conversation_data_t;
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static int
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dissect_rtspinterleaved(tvbuff_t *tvb, int offset, packet_info *pinfo,
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proto_tree *tree)
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{
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proto_tree *rtspframe_tree;
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proto_item *ti;
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int orig_offset;
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guint8 rf_start; /* always RTSP_FRAMEHDR */
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guint8 rf_chan; /* interleaved channel id */
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guint16 rf_len; /* packet length */
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gint framelen;
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tvbuff_t *next_tvb;
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conversation_t *conv;
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rtsp_conversation_data_t *data;
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dissector_handle_t dissector;
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orig_offset = offset;
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rf_start = tvb_get_guint8(tvb, offset);
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rf_chan = tvb_get_guint8(tvb, offset+1);
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rf_len = tvb_get_ntohs(tvb, offset+2);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_fstr(pinfo->cinfo, COL_INFO,
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"Interleaved channel 0x%02x, %u bytes",
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rf_chan, rf_len);
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if (tree == NULL) {
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/*
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* We're not building a full protocol tree; all we care
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* about is setting the column info.
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*/
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return -1;
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}
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ti = proto_tree_add_protocol_format(tree, proto_rtsp, tvb, offset, 4,
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"RTSP Interleaved Frame, Channel: 0x%02x, %u bytes",
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rf_chan, rf_len);
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rtspframe_tree = proto_item_add_subtree(ti, ett_rtspframe);
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proto_tree_add_text(rtspframe_tree, tvb, offset, 1,
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"Magic: 0x%02x",
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rf_start);
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offset += 1;
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proto_tree_add_text(rtspframe_tree, tvb, offset, 1,
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"Channel: 0x%02x",
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rf_chan);
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offset += 1;
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proto_tree_add_text(rtspframe_tree, tvb, offset, 2,
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"Length: %u bytes",
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rf_len);
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offset += 2;
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/*
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* We set the actual length of the tvbuff for the interleaved
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* stuff to the minimum of what's left in the tvbuff and the
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* length in the header.
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*
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* XXX - what if there's nothing left in the tvbuff?
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* We'd want a BoundsError exception to be thrown, so
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* that a Short Frame would be reported.
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*/
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framelen = tvb_length_remaining(tvb, offset);
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if (framelen > rf_len)
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framelen = rf_len;
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next_tvb = tvb_new_subset(tvb, offset, framelen, rf_len);
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conv = find_conversation(&pinfo->src, &pinfo->dst, pinfo->ptype,
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pinfo->srcport, pinfo->destport, 0);
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if (conv &&
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(data = conversation_get_proto_data(conv, proto_rtsp)) &&
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rf_chan < RTSP_MAX_INTERLEAVED &&
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(dissector = data->interleaved[rf_chan].dissector)) {
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call_dissector(dissector, next_tvb, pinfo, tree);
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} else {
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proto_tree_add_text(rtspframe_tree, tvb, offset, rf_len,
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"Data (%u bytes)", rf_len);
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}
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offset += rf_len;
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return offset - orig_offset;
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}
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static void process_rtsp_request(tvbuff_t *tvb, int offset, const guchar *data,
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size_t linelen, proto_tree *tree);
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static void process_rtsp_reply(tvbuff_t *tvb, int offset, const guchar *data,
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size_t linelen, proto_tree *tree);
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typedef enum {
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RTSP_REQUEST,
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RTSP_REPLY,
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NOT_RTSP
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} rtsp_type_t;
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static const char *rtsp_methods[] = {
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"DESCRIBE", "ANNOUNCE", "GET_PARAMETER", "OPTIONS",
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"PAUSE", "PLAY", "RECORD", "REDIRECT", "SETUP",
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"SET_PARAMETER", "TEARDOWN"
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};
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#define RTSP_NMETHODS (sizeof rtsp_methods / sizeof rtsp_methods[0])
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static rtsp_type_t
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is_rtsp_request_or_reply(const guchar *line, size_t linelen)
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{
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unsigned ii;
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/* Is this an RTSP reply? */
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if (linelen >= 5 && strncasecmp("RTSP/", line, 5) == 0) {
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/*
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* Yes.
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*/
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return RTSP_REPLY;
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}
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/*
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* Is this an RTSP request?
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* Check whether the line begins with one of the RTSP request
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* methods.
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*/
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for (ii = 0; ii < RTSP_NMETHODS; ii++) {
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size_t len = strlen(rtsp_methods[ii]);
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if (linelen >= len &&
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strncasecmp(rtsp_methods[ii], line, len) == 0)
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return RTSP_REQUEST;
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}
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return NOT_RTSP;
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}
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static const char rtsp_content_type[] = "Content-Type:";
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static int
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is_content_sdp(const guchar *line, size_t linelen)
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{
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static const char type[] = "application/sdp";
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size_t typelen = STRLEN_CONST(type);
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line += STRLEN_CONST(rtsp_content_type);
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linelen -= STRLEN_CONST(rtsp_content_type);
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while (linelen > 0 && (*line == ' ' || *line == '\t')) {
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line++;
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linelen--;
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}
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if (linelen < typelen || strncasecmp(type, line, typelen))
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return FALSE;
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line += typelen;
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linelen -= typelen;
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if (linelen > 0 && !isspace(*line))
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return FALSE;
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return TRUE;
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}
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static const char rtsp_transport[] = "Transport:";
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static const char rtsp_sps[] = "server_port=";
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static const char rtsp_cps[] = "client_port=";
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static const char rtsp_rtp[] = "rtp/";
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static const char rtsp_inter[] = "interleaved=";
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static void
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rtsp_create_conversation(packet_info *pinfo, const guchar *line_begin,
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size_t line_len)
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{
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conversation_t *conv;
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guchar buf[256];
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guchar *tmp;
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guint c_data_port, c_mon_port;
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guint s_data_port, s_mon_port;
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address null_addr;
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if (line_len > sizeof(buf) - 1) {
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/*
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* Don't overflow the buffer.
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*/
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line_len = sizeof(buf) - 1;
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}
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memcpy(buf, line_begin, line_len);
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buf[line_len] = '\0';
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tmp = buf + STRLEN_CONST(rtsp_transport);
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while (*tmp && isspace(*tmp))
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tmp++;
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if (strncasecmp(tmp, rtsp_rtp, strlen(rtsp_rtp)) != 0) {
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g_warning("Frame %u: rtsp: unknown transport", pinfo->fd->num);
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return;
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}
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c_data_port = c_mon_port = 0;
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s_data_port = s_mon_port = 0;
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if ((tmp = strstr(buf, rtsp_sps))) {
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tmp += strlen(rtsp_sps);
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if (sscanf(tmp, "%u-%u", &s_data_port, &s_mon_port) < 1) {
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g_warning("Frame %u: rtsp: bad server_port",
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pinfo->fd->num);
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return;
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}
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}
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if ((tmp = strstr(buf, rtsp_cps))) {
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tmp += strlen(rtsp_cps);
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if (sscanf(tmp, "%u-%u", &c_data_port, &c_mon_port) < 1) {
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g_warning("Frame %u: rtsp: bad client_port",
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pinfo->fd->num);
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return;
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}
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}
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if (!c_data_port) {
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rtsp_conversation_data_t *data;
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guint s_data_chan, s_mon_chan;
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int i;
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/*
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* Deal with RTSP TCP-interleaved conversations.
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*/
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if ((tmp = strstr(buf, rtsp_inter)) == NULL) {
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/*
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* No interleaved or server_port - probably a
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* SETUP request, rather than reply.
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*/
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return;
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}
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tmp += strlen(rtsp_inter);
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i = sscanf(tmp, "%u-%u", &s_data_chan, &s_mon_chan);
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if (i < 1) {
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g_warning("Frame %u: rtsp: bad interleaved",
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pinfo->fd->num);
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return;
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}
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conv = find_conversation(&pinfo->src, &pinfo->dst, pinfo->ptype,
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pinfo->srcport, pinfo->destport, 0);
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if (!conv) {
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conv = conversation_new(&pinfo->src, &pinfo->dst,
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pinfo->ptype, pinfo->srcport, pinfo->destport,
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0);
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}
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data = conversation_get_proto_data(conv, proto_rtsp);
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if (!data) {
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data = g_mem_chunk_alloc(rtsp_vals);
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conversation_add_proto_data(conv, proto_rtsp, data);
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}
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if (s_data_chan < RTSP_MAX_INTERLEAVED) {
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data->interleaved[s_data_chan].dissector =
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rtp_handle;
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}
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if (i > 1 && s_mon_chan < RTSP_MAX_INTERLEAVED) {
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data->interleaved[s_mon_chan].dissector =
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rtcp_handle;
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}
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return;
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}
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/*
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* We only want to match on the destination address, not the
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* source address, because the server might send back a packet
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* from an address other than the address to which its client
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* sent the packet, so we construct a conversation with no
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* second address.
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*/
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SET_ADDRESS(&null_addr, pinfo->src.type, 0, NULL);
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conv = conversation_new(&pinfo->dst, &null_addr, PT_UDP, c_data_port,
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s_data_port, NO_ADDR2 | (!s_data_port ? NO_PORT2 : 0));
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conversation_set_dissector(conv, rtp_handle);
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if (!c_mon_port)
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return;
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conv = conversation_new(&pinfo->dst, &null_addr, PT_UDP, c_mon_port,
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s_mon_port, NO_ADDR2 | (!s_mon_port ? NO_PORT2 : 0));
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conversation_set_dissector(conv, rtcp_handle);
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}
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static const char rtsp_content_length[] = "Content-Length:";
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static int
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rtsp_get_content_length(const guchar *line_begin, size_t line_len)
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{
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guchar buf[256];
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guchar *tmp;
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long content_length;
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char *p;
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guchar *up;
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if (line_len > sizeof(buf) - 1) {
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/*
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* Don't overflow the buffer.
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*/
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line_len = sizeof(buf) - 1;
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}
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memcpy(buf, line_begin, line_len);
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buf[line_len] = '\0';
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tmp = buf + STRLEN_CONST(rtsp_content_length);
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while (*tmp && isspace(*tmp))
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tmp++;
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content_length = strtol(tmp, &p, 10);
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up = p;
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if (up == tmp || (*up != '\0' && !isspace(*up)))
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return -1; /* not a valid number */
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return content_length;
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}
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static int
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dissect_rtspmessage(tvbuff_t *tvb, int offset, packet_info *pinfo,
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proto_tree *tree)
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{
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proto_tree *rtsp_tree;
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proto_item *ti = NULL;
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const guchar *line;
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gint next_offset;
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const guchar *linep, *lineend;
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int orig_offset;
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size_t linelen;
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guchar c;
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gboolean is_mime_header;
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int is_sdp = FALSE;
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int datalen;
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int content_length;
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int reported_datalen;
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orig_offset = offset;
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rtsp_tree = NULL;
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if (tree) {
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ti = proto_tree_add_item(tree, proto_rtsp, tvb, offset, -1,
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FALSE);
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rtsp_tree = proto_item_add_subtree(ti, ett_rtsp);
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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/*
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* Put the first line from the buffer into the summary
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* if it's an RTSP request or reply (but leave out the
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* line terminator).
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* Otherwise, just call it a continuation.
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*/
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linelen = tvb_find_line_end(tvb, offset, -1, &next_offset,
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FALSE);
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line = tvb_get_ptr(tvb, offset, linelen);
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switch (is_rtsp_request_or_reply(line, linelen)) {
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case RTSP_REQUEST:
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case RTSP_REPLY:
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col_add_str(pinfo->cinfo, COL_INFO,
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format_text(line, linelen));
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break;
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default:
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col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
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break;
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}
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}
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/*
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* We haven't yet seen a Content-Length header.
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*/
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content_length = -1;
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/*
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* Process the packet data, 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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* We haven't yet concluded that this is a MIME header.
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*/
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is_mime_header = FALSE;
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/*
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* Find the end of the line.
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*/
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linelen = tvb_find_line_end(tvb, offset, -1, &next_offset,
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FALSE);
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/*
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* Get a buffer that refers to the line.
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*/
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line = tvb_get_ptr(tvb, offset, linelen);
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lineend = line + linelen;
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/*
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* OK, does it look like an RTSP request or
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* response?
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*/
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switch (is_rtsp_request_or_reply(line, linelen)) {
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case RTSP_REQUEST:
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if (rtsp_tree != NULL)
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process_rtsp_request(tvb, offset, line, linelen,
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rtsp_tree);
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goto is_rtsp;
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case RTSP_REPLY:
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if (rtsp_tree != NULL)
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process_rtsp_reply(tvb, offset, line, linelen,
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rtsp_tree);
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goto is_rtsp;
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case NOT_RTSP:
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break;
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}
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/*
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* No. Does it look like a blank line (as would
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* appear at the end of an RTSP request)?
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*/
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if (linelen == 0)
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goto is_rtsp; /* Yes. */
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/*
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* No. Does it look like a MIME header?
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*/
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linep = line;
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while (linep < lineend) {
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c = *linep++;
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if (!isprint(c))
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break; /* not printable, not a MIME header */
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switch (c) {
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case '(':
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case ')':
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case '<':
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case '>':
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case '@':
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case ',':
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case ';':
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case '\\':
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case '"':
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case '/':
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|
case '[':
|
|
case ']':
|
|
case '?':
|
|
case '=':
|
|
case '{':
|
|
case '}':
|
|
/*
|
|
* It's a tspecial, so it's not
|
|
* part of a token, so it's not
|
|
* a field name for the beginning
|
|
* of a MIME header.
|
|
*/
|
|
goto not_rtsp;
|
|
|
|
case ':':
|
|
/*
|
|
* This ends the token; we consider
|
|
* this to be a MIME header.
|
|
*/
|
|
is_mime_header = TRUE;
|
|
goto is_rtsp;
|
|
|
|
case ' ':
|
|
case '\t':
|
|
/*
|
|
* LWS (RFC-2616, 4.2); continue the previous
|
|
* header.
|
|
*/
|
|
goto is_rtsp;
|
|
}
|
|
}
|
|
|
|
not_rtsp:
|
|
/*
|
|
* We don't consider this part of an RTSP request or
|
|
* reply, so we don't display it.
|
|
*/
|
|
break;
|
|
|
|
is_rtsp:
|
|
/*
|
|
* Put this line.
|
|
*/
|
|
if (rtsp_tree) {
|
|
proto_tree_add_text(rtsp_tree, tvb, offset,
|
|
next_offset - offset, "%s",
|
|
tvb_format_text(tvb, offset, next_offset - offset));
|
|
}
|
|
if (is_mime_header) {
|
|
/*
|
|
* Process some MIME headers specially.
|
|
*/
|
|
#define MIME_HDR_MATCHES(header) \
|
|
(linelen > STRLEN_CONST(header) && \
|
|
strncasecmp(line, (header), STRLEN_CONST(header)) == 0)
|
|
|
|
if (MIME_HDR_MATCHES(rtsp_transport)) {
|
|
/*
|
|
* Based on the port numbers specified
|
|
* in the Transport: header, set up
|
|
* a conversation that will be dissected
|
|
* with the appropriate dissector.
|
|
*/
|
|
rtsp_create_conversation(pinfo, line, linelen);
|
|
} else if (MIME_HDR_MATCHES(rtsp_content_type)) {
|
|
/*
|
|
* If the Content-Type: header says this
|
|
* is SDP, dissect the payload as SDP.
|
|
*/
|
|
if (is_content_sdp(line, linelen))
|
|
is_sdp = TRUE;
|
|
} else if (MIME_HDR_MATCHES(rtsp_content_length)) {
|
|
/*
|
|
* Only the amount specified by the
|
|
* Content-Length: header should be treated
|
|
* as payload.
|
|
*/
|
|
content_length = rtsp_get_content_length(line,
|
|
linelen);
|
|
}
|
|
}
|
|
offset = next_offset;
|
|
}
|
|
|
|
/*
|
|
* If a content length was supplied, the amount of data to be
|
|
* processed as RTSP payload is the minimum of the content
|
|
* length and the amount of data remaining in the frame.
|
|
*
|
|
* If no content length was supplied, the amount of data to be
|
|
* processed is the amount of data remaining in the frame.
|
|
*/
|
|
datalen = tvb_length_remaining(tvb, offset);
|
|
if (content_length != -1) {
|
|
if (datalen > content_length)
|
|
datalen = content_length;
|
|
|
|
/*
|
|
* XXX - for now, if the content length is greater
|
|
* than the amount of data left in this frame (not
|
|
* the amount of *captured* data left in the frame
|
|
* minus the current offset, but the amount of *actual*
|
|
* data that was reported to be in the frame minus
|
|
* the current offset), limit it to the amount
|
|
* of data left in this frame.
|
|
*
|
|
* If we ever handle data that crosses frame
|
|
* boundaries, we'll need to remember the actual
|
|
* content length.
|
|
*/
|
|
reported_datalen = tvb_reported_length_remaining(tvb, offset);
|
|
if (content_length > reported_datalen)
|
|
content_length = reported_datalen;
|
|
}
|
|
|
|
if (datalen > 0) {
|
|
/*
|
|
* There's stuff left over; process it.
|
|
*/
|
|
if (is_sdp) {
|
|
tvbuff_t *new_tvb;
|
|
|
|
/*
|
|
* Fix up the top-level item so that it doesn't
|
|
* include the SDP stuff.
|
|
*/
|
|
if (ti != NULL)
|
|
proto_item_set_len(ti, offset);
|
|
|
|
/*
|
|
* Now create a tvbuff for the SDP stuff and
|
|
* dissect it.
|
|
*
|
|
* The amount of data to be processed that's
|
|
* available in the tvbuff is "datalen", which
|
|
* is the minimum of the amount of data left in
|
|
* the tvbuff and any specified content length.
|
|
*
|
|
* The amount of data to be processed that's in
|
|
* this frame, regardless of whether it was
|
|
* captured or not, is "content_length",
|
|
* which, if no content length was specified,
|
|
* is -1, i.e. "to the end of the frame.
|
|
*/
|
|
new_tvb = tvb_new_subset(tvb, offset, datalen,
|
|
content_length);
|
|
call_dissector(sdp_handle, new_tvb, pinfo, tree);
|
|
} else {
|
|
if (tvb_get_guint8(tvb, offset) == RTSP_FRAMEHDR) {
|
|
/*
|
|
* This is interleaved stuff; don't
|
|
* treat it as raw data - set "datalen"
|
|
* to 0, so we won't skip the offset
|
|
* past it, which will cause our
|
|
* caller to process that stuff itself.
|
|
*/
|
|
datalen = 0;
|
|
} else {
|
|
proto_tree_add_text(rtsp_tree, tvb, offset,
|
|
datalen, "Data (%d bytes)", datalen);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We've processed "datalen" bytes worth of data
|
|
* (which may be no data at all); advance the
|
|
* offset past whatever data we've processed, so they
|
|
* don't process it.
|
|
*/
|
|
offset += datalen;
|
|
}
|
|
return offset - orig_offset;
|
|
}
|
|
|
|
static void
|
|
process_rtsp_request(tvbuff_t *tvb, int offset, const guchar *data,
|
|
size_t linelen, proto_tree *tree)
|
|
{
|
|
const guchar *lineend = data + linelen;
|
|
unsigned ii;
|
|
const guchar *url;
|
|
const guchar *url_start;
|
|
guchar *tmp_url;
|
|
|
|
/* Request Methods */
|
|
for (ii = 0; ii < RTSP_NMETHODS; ii++) {
|
|
size_t len = strlen(rtsp_methods[ii]);
|
|
if (linelen >= len && !strncasecmp(rtsp_methods[ii], data, len))
|
|
break;
|
|
}
|
|
if (ii == RTSP_NMETHODS) {
|
|
/*
|
|
* We got here because "is_rtsp_request_or_reply()" returned
|
|
* RTSP_REQUEST, so we know one of the request methods
|
|
* matched, so we "can't get here".
|
|
*/
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
/* Method name */
|
|
proto_tree_add_string_hidden(tree, hf_rtsp_method, tvb, offset,
|
|
strlen(rtsp_methods[ii]), rtsp_methods[ii]);
|
|
|
|
/* URL */
|
|
url = data;
|
|
while (url < lineend && !isspace(*url))
|
|
url++;
|
|
while (url < lineend && isspace(*url))
|
|
url++;
|
|
url_start = url;
|
|
while (url < lineend && !isspace(*url))
|
|
url++;
|
|
tmp_url = g_malloc(url - url_start + 1);
|
|
memcpy(tmp_url, url_start, url - url_start);
|
|
tmp_url[url - url_start] = 0;
|
|
proto_tree_add_string_hidden(tree, hf_rtsp_url, tvb,
|
|
offset + (url_start - data), url - url_start, tmp_url);
|
|
g_free(tmp_url);
|
|
}
|
|
|
|
static void
|
|
process_rtsp_reply(tvbuff_t *tvb, int offset, const guchar *data,
|
|
size_t linelen, proto_tree *tree)
|
|
{
|
|
const guchar *lineend = data + linelen;
|
|
const guchar *status = data;
|
|
const guchar *status_start;
|
|
unsigned int status_i;
|
|
|
|
/* status code */
|
|
while (status < lineend && !isspace(*status))
|
|
status++;
|
|
while (status < lineend && isspace(*status))
|
|
status++;
|
|
status_start = status;
|
|
status_i = 0;
|
|
while (status < lineend && isdigit(*status))
|
|
status_i = status_i * 10 + *status++ - '0';
|
|
proto_tree_add_uint_hidden(tree, hf_rtsp_status, tvb,
|
|
offset + (status_start - data),
|
|
status - status_start, status_i);
|
|
}
|
|
|
|
static void
|
|
dissect_rtsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
int offset = 0;
|
|
int len;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "RTSP");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
while (tvb_offset_exists(tvb, offset)) {
|
|
len = (tvb_get_guint8(tvb, offset) == RTSP_FRAMEHDR)
|
|
? dissect_rtspinterleaved(tvb, offset, pinfo, tree)
|
|
: dissect_rtspmessage(tvb, offset, pinfo, tree);
|
|
if (len == -1)
|
|
break;
|
|
offset += len;
|
|
|
|
/*
|
|
* OK, we've set the Protocol and Info columns for the
|
|
* first RTSP message; make the columns non-writable,
|
|
* so that we don't change it for subsequent RTSP messages.
|
|
*/
|
|
col_set_writable(pinfo->cinfo, FALSE);
|
|
}
|
|
}
|
|
|
|
static void
|
|
rtsp_init(void)
|
|
{
|
|
/* Routine to initialize rtsp protocol before each capture or filter pass. */
|
|
/* Release any memory if needed. Then setup the memory chunks. */
|
|
|
|
if (rtsp_vals)
|
|
g_mem_chunk_destroy(rtsp_vals);
|
|
|
|
rtsp_vals = g_mem_chunk_new("rtsp_vals",
|
|
sizeof(rtsp_conversation_data_t),
|
|
rtsp_hash_init_count * sizeof(rtsp_conversation_data_t),
|
|
G_ALLOC_AND_FREE);
|
|
}
|
|
|
|
void
|
|
proto_register_rtsp(void)
|
|
{
|
|
static gint *ett[] = {
|
|
&ett_rtspframe,
|
|
&ett_rtsp,
|
|
};
|
|
static hf_register_info hf[] = {
|
|
{ &hf_rtsp_method,
|
|
{ "Method", "rtsp.method", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
|
|
{ &hf_rtsp_url,
|
|
{ "URL", "rtsp.url", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
|
|
{ &hf_rtsp_status,
|
|
{ "Status", "rtsp.status", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL }},
|
|
};
|
|
|
|
proto_rtsp = proto_register_protocol("Real Time Streaming Protocol",
|
|
"RTSP", "rtsp");
|
|
proto_register_field_array(proto_rtsp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_init_routine(rtsp_init); /* register re-init routine */
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_rtsp(void)
|
|
{
|
|
dissector_handle_t rtsp_handle;
|
|
|
|
rtsp_handle = create_dissector_handle(dissect_rtsp, proto_rtsp);
|
|
dissector_add("tcp.port", TCP_PORT_RTSP, rtsp_handle);
|
|
|
|
sdp_handle = find_dissector("sdp");
|
|
rtp_handle = find_dissector("rtp");
|
|
rtcp_handle = find_dissector("rtcp");
|
|
}
|