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authorGilbert Ramirez <gram@alumni.rice.edu>2004-07-18 18:06:47 +0000
committerGilbert Ramirez <gram@alumni.rice.edu>2004-07-18 18:06:47 +0000
commit669db206cb1f270046ad400fff7655e20c63e723 (patch)
tree4eff24a2e16c8963e497e1fc575f35e6af59bd26 /packet-rtsp.c
parentae46c27a38700af669ef907491081f09df6f6b2c (diff)
Move dissectors to epan/dissectors directory.
Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410
Diffstat (limited to 'packet-rtsp.c')
-rw-r--r--packet-rtsp.c1217
1 files changed, 0 insertions, 1217 deletions
diff --git a/packet-rtsp.c b/packet-rtsp.c
deleted file mode 100644
index 1a1453494e..0000000000
--- a/packet-rtsp.c
+++ /dev/null
@@ -1,1217 +0,0 @@
-/* packet-rtsp.c
- * Routines for RTSP packet disassembly (RFC 2326)
- *
- * Jason Lango <jal@netapp.com>
- * Liberally copied from packet-http.c, by Guy Harris <guy@alum.mit.edu>
- *
- * $Id$
- *
- * Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@ethereal.com>
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * References:
- * RTSP is defined in RFC 2326, http://www.ietf.org/rfc/rfc2326.txt?number=2326
- * http://www.iana.org/assignments/rsvp-parameters
- */
-
-#include "config.h"
-
-#include <string.h>
-#include <ctype.h>
-#include <stdlib.h>
-
-#include "prefs.h"
-
-#include <glib.h>
-#include <epan/packet.h>
-#include "req_resp_hdrs.h"
-#include "packet-rtp.h"
-#include "packet-rtcp.h"
-#include <epan/conversation.h>
-#include <epan/strutil.h>
-#include "packet-e164.h"
-
-static int proto_rtsp = -1;
-
-static gint ett_rtsp = -1;
-static gint ett_rtspframe = -1;
-static gint ett_rtsp_method = -1;
-
-static int hf_rtsp_method = -1;
-static int hf_rtsp_url = -1;
-static int hf_rtsp_status = -1;
-static int hf_rtsp_session = -1;
-static int hf_rtsp_X_Vig_Msisdn = -1;
-
-static dissector_handle_t sdp_handle;
-static dissector_handle_t rtp_handle;
-static dissector_handle_t rtcp_handle;
-
-void proto_reg_handoff_rtsp(void);
-
-static GMemChunk *rtsp_vals = NULL;
-#define rtsp_hash_init_count 20
-
-/*
- * desegmentation of RTSP headers
- * (when we are over TCP or another protocol providing the desegmentation API)
- */
-static gboolean rtsp_desegment_headers = FALSE;
-
-/*
- * desegmentation of RTSP bodies
- * (when we are over TCP or another protocol providing the desegmentation API)
- * TODO let the user filter on content-type the bodies he wants desegmented
- */
-static gboolean rtsp_desegment_body = FALSE;
-
-/* http://www.iana.org/assignments/port-numberslists two rtsp ports */
-#define TCP_PORT_RTSP 554
-#define TCP_ALTERNATE_PORT_RTSP 8554
-static guint global_rtsp_tcp_port = TCP_PORT_RTSP;
-static guint global_rtsp_tcp_alternate_port = TCP_ALTERNATE_PORT_RTSP;
-/*
-* Variables to allow for proper deletion of dissector registration when
-* the user changes port from the gui.
-*/
-static guint tcp_port = 0;
-static guint tcp_alternate_port = 0;
-
-/*
- * Takes an array of bytes, assumed to contain a null-terminated
- * string, as an argument, and returns the length of the string -
- * i.e., the size of the array, minus 1 for the null terminator.
- */
-#define STRLEN_CONST(str) (sizeof (str) - 1)
-
-#define RTSP_FRAMEHDR ('$')
-
-typedef struct {
- dissector_handle_t dissector;
-} rtsp_interleaved_t;
-
-#define RTSP_MAX_INTERLEAVED (8)
-
-/*
- * Careful about dynamically allocating memory in this structure (say
- * for dynamically increasing the size of the 'interleaved' array) -
- * the containing structure is garbage collected and contained
- * pointers will not be freed.
- */
-typedef struct {
- rtsp_interleaved_t interleaved[RTSP_MAX_INTERLEAVED];
-} rtsp_conversation_data_t;
-
-static int
-dissect_rtspinterleaved(tvbuff_t *tvb, int offset, packet_info *pinfo,
- proto_tree *tree)
-{
- guint length_remaining;
- proto_item *ti;
- proto_tree *rtspframe_tree = NULL;
- int orig_offset;
- guint8 rf_start; /* always RTSP_FRAMEHDR */
- guint8 rf_chan; /* interleaved channel id */
- guint16 rf_len; /* packet length */
- tvbuff_t *next_tvb;
- conversation_t *conv;
- rtsp_conversation_data_t *data;
- dissector_handle_t dissector;
-
- /*
- * This will throw an exception if we don't have any data left.
- * That's what we want. (See "tcp_dissect_pdus()", which is
- * similar.)
- */
- length_remaining = tvb_ensure_length_remaining(tvb, offset);
-
- /*
- * Can we do reassembly?
- */
- if (rtsp_desegment_headers && pinfo->can_desegment) {
- /*
- * Yes - would an RTSP multiplexed header starting at
- * this offset be split across segment boundaries?
- */
- if (length_remaining < 4) {
- /*
- * Yes. Tell the TCP dissector where the data
- * for this message starts in the data it handed
- * us, and how many more bytes we need, and return.
- */
- pinfo->desegment_offset = offset;
- pinfo->desegment_len = 4 - length_remaining;
- return -1;
- }
- }
-
- /*
- * Get the "$", channel, and length from the header.
- */
- orig_offset = offset;
- rf_start = tvb_get_guint8(tvb, offset);
- rf_chan = tvb_get_guint8(tvb, offset+1);
- rf_len = tvb_get_ntohs(tvb, offset+2);
-
- /*
- * Can we do reassembly?
- */
- if (rtsp_desegment_body && pinfo->can_desegment) {
- /*
- * Yes - is the header + encapsulated packet split
- * across segment boundaries?
- */
- if (length_remaining < 4U + rf_len) {
- /*
- * Yes. Tell the TCP dissector where the data
- * for this message starts in the data it handed
- * us, and how many more bytes we need, and return.
- */
- pinfo->desegment_offset = offset;
- pinfo->desegment_len = 4U + rf_len - length_remaining;
- return -1;
- }
- }
-
- if (check_col(pinfo->cinfo, COL_INFO))
- col_add_fstr(pinfo->cinfo, COL_INFO,
- "Interleaved channel 0x%02x, %u bytes",
- rf_chan, rf_len);
-
- if (tree != NULL) {
- ti = proto_tree_add_protocol_format(tree, proto_rtsp, tvb,
- offset, 4,
- "RTSP Interleaved Frame, Channel: 0x%02x, %u bytes",
- rf_chan, rf_len);
- rtspframe_tree = proto_item_add_subtree(ti, ett_rtspframe);
-
- proto_tree_add_text(rtspframe_tree, tvb, offset, 1,
- "Magic: 0x%02x",
- rf_start);
- }
- offset += 1;
-
- if (tree != NULL) {
- proto_tree_add_text(rtspframe_tree, tvb, offset, 1,
- "Channel: 0x%02x",
- rf_chan);
- }
- offset += 1;
-
- if (tree != NULL) {
- proto_tree_add_text(rtspframe_tree, tvb, offset, 2,
- "Length: %u bytes",
- rf_len);
- }
- offset += 2;
-
- /*
- * We set the actual length of the tvbuff for the interleaved
- * stuff to the minimum of what's left in the tvbuff and the
- * length in the header.
- *
- * XXX - what if there's nothing left in the tvbuff?
- * We'd want a BoundsError exception to be thrown, so
- * that a Short Frame would be reported.
- */
- if (length_remaining > rf_len)
- length_remaining = rf_len;
- next_tvb = tvb_new_subset(tvb, offset, length_remaining, rf_len);
-
- conv = find_conversation(&pinfo->src, &pinfo->dst, pinfo->ptype,
- pinfo->srcport, pinfo->destport, 0);
-
- if (conv &&
- (data = conversation_get_proto_data(conv, proto_rtsp)) &&
- rf_chan < RTSP_MAX_INTERLEAVED &&
- (dissector = data->interleaved[rf_chan].dissector)) {
- call_dissector(dissector, next_tvb, pinfo, tree);
- } else {
- proto_tree_add_text(rtspframe_tree, tvb, offset, rf_len,
- "Data (%u bytes)", rf_len);
- }
-
- offset += rf_len;
-
- return offset - orig_offset;
-}
-
-static void process_rtsp_request(tvbuff_t *tvb, int offset, const guchar *data,
- size_t linelen, proto_tree *tree);
-
-static void process_rtsp_reply(tvbuff_t *tvb, int offset, const guchar *data,
- size_t linelen, proto_tree *tree);
-
-typedef enum {
- RTSP_REQUEST,
- RTSP_REPLY,
- NOT_RTSP
-} rtsp_type_t;
-
-static const char *rtsp_methods[] = {
- "DESCRIBE",
- "ANNOUNCE",
- "GET_PARAMETER",
- "OPTIONS",
- "PAUSE",
- "PLAY",
- "RECORD",
- "REDIRECT",
- "SETUP",
- "SET_PARAMETER",
- "TEARDOWN"
-};
-
-#define RTSP_NMETHODS (sizeof rtsp_methods / sizeof rtsp_methods[0])
-
-static gboolean
-is_rtsp_request_or_reply(const guchar *line, size_t linelen, rtsp_type_t *type)
-{
- unsigned ii;
-
- /* Is this an RTSP reply? */
- if (linelen >= 5 && strncasecmp("RTSP/", line, 5) == 0) {
- /*
- * Yes.
- */
- *type = RTSP_REPLY;
- return TRUE;
- }
-
- /*
- * Is this an RTSP request?
- * Check whether the line begins with one of the RTSP request
- * methods.
- */
- for (ii = 0; ii < RTSP_NMETHODS; ii++) {
- size_t len = strlen(rtsp_methods[ii]);
- if (linelen >= len &&
- strncasecmp(rtsp_methods[ii], line, len) == 0 &&
- (len == linelen || isspace(line[len]))) {
- *type = RTSP_REQUEST;
- return TRUE;
- }
- }
- *type = NOT_RTSP;
- return FALSE;
-}
-
-static const char rtsp_content_type[] = "Content-Type:";
-
-static int
-is_content_sdp(const guchar *line, size_t linelen)
-{
- static const char type[] = "application/sdp";
- size_t typelen = STRLEN_CONST(type);
-
- line += STRLEN_CONST(rtsp_content_type);
- linelen -= STRLEN_CONST(rtsp_content_type);
- while (linelen > 0 && (*line == ' ' || *line == '\t')) {
- line++;
- linelen--;
- }
-
- if (linelen < typelen || strncasecmp(type, line, typelen))
- return FALSE;
-
- line += typelen;
- linelen -= typelen;
- if (linelen > 0 && !isspace(*line))
- return FALSE;
-
- return TRUE;
-}
-
-static const char rtsp_transport[] = "Transport:";
-static const char rtsp_sps[] = "server_port=";
-static const char rtsp_cps[] = "client_port=";
-static const char rtsp_rtp[] = "rtp/";
-static const char rtsp_inter[] = "interleaved=";
-
-static void
-rtsp_create_conversation(packet_info *pinfo, const guchar *line_begin,
- size_t line_len)
-{
- conversation_t *conv;
- guchar buf[256];
- guchar *tmp;
- guint c_data_port, c_mon_port;
- guint s_data_port, s_mon_port;
- address null_addr;
-
- if (line_len > sizeof(buf) - 1) {
- /*
- * Don't overflow the buffer.
- */
- line_len = sizeof(buf) - 1;
- }
- memcpy(buf, line_begin, line_len);
- buf[line_len] = '\0';
-
- tmp = buf + STRLEN_CONST(rtsp_transport);
- while (*tmp && isspace(*tmp))
- tmp++;
- if (strncasecmp(tmp, rtsp_rtp, strlen(rtsp_rtp)) != 0) {
- g_warning("Frame %u: rtsp: unknown transport", pinfo->fd->num);
- return;
- }
-
- c_data_port = c_mon_port = 0;
- s_data_port = s_mon_port = 0;
- if ((tmp = strstr(buf, rtsp_sps))) {
- tmp += strlen(rtsp_sps);
- if (sscanf(tmp, "%u-%u", &s_data_port, &s_mon_port) < 1) {
- g_warning("Frame %u: rtsp: bad server_port",
- pinfo->fd->num);
- return;
- }
- }
- if ((tmp = strstr(buf, rtsp_cps))) {
- tmp += strlen(rtsp_cps);
- if (sscanf(tmp, "%u-%u", &c_data_port, &c_mon_port) < 1) {
- g_warning("Frame %u: rtsp: bad client_port",
- pinfo->fd->num);
- return;
- }
- }
- if (!c_data_port) {
- rtsp_conversation_data_t *data;
- guint s_data_chan, s_mon_chan;
- int i;
-
- /*
- * Deal with RTSP TCP-interleaved conversations.
- */
- if ((tmp = strstr(buf, rtsp_inter)) == NULL) {
- /*
- * No interleaved or server_port - probably a
- * SETUP request, rather than reply.
- */
- return;
- }
- tmp += strlen(rtsp_inter);
- i = sscanf(tmp, "%u-%u", &s_data_chan, &s_mon_chan);
- if (i < 1) {
- g_warning("Frame %u: rtsp: bad interleaved",
- pinfo->fd->num);
- return;
- }
- conv = find_conversation(&pinfo->src, &pinfo->dst, pinfo->ptype,
- pinfo->srcport, pinfo->destport, 0);
- if (!conv) {
- conv = conversation_new(&pinfo->src, &pinfo->dst,
- pinfo->ptype, pinfo->srcport, pinfo->destport,
- 0);
- }
- data = conversation_get_proto_data(conv, proto_rtsp);
- if (!data) {
- data = g_mem_chunk_alloc(rtsp_vals);
- conversation_add_proto_data(conv, proto_rtsp, data);
- }
- if (s_data_chan < RTSP_MAX_INTERLEAVED) {
- data->interleaved[s_data_chan].dissector =
- rtp_handle;
- }
- if (i > 1 && s_mon_chan < RTSP_MAX_INTERLEAVED) {
- data->interleaved[s_mon_chan].dissector =
- rtcp_handle;
- }
- return;
- }
-
- /*
- * We only want to match on the destination address, not the
- * source address, because the server might send back a packet
- * from an address other than the address to which its client
- * sent the packet, so we construct a conversation with no
- * second address.
- */
- SET_ADDRESS(&null_addr, pinfo->src.type, 0, NULL);
-
- rtp_add_address(pinfo, (char *)pinfo->dst.data, c_data_port, s_data_port,
- "RTSP", pinfo->fd->num);
-
- if (!c_mon_port)
- return;
-
- rtcp_add_address(pinfo, (char *)pinfo->dst.data, c_mon_port, s_mon_port,
- "RTSP", pinfo->fd->num);
-}
-
-static const char rtsp_content_length[] = "Content-Length:";
-
-static int
-rtsp_get_content_length(const guchar *line_begin, size_t line_len)
-{
- guchar buf[256];
- guchar *tmp;
- long content_length;
- char *p;
- guchar *up;
-
- if (line_len > sizeof(buf) - 1) {
- /*
- * Don't overflow the buffer.
- */
- line_len = sizeof(buf) - 1;
- }
- memcpy(buf, line_begin, line_len);
- buf[line_len] = '\0';
-
- tmp = buf + STRLEN_CONST(rtsp_content_length);
- while (*tmp && isspace(*tmp))
- tmp++;
- content_length = strtol(tmp, &p, 10);
- up = p;
- if (up == tmp || (*up != '\0' && !isspace(*up)))
- return -1; /* not a valid number */
- return content_length;
-}
-
-static const char rtsp_Session[] = "Session:";
-static const char rtsp_X_Vig_Msisdn[] = "X-Vig-Msisdn";
-
-static int
-dissect_rtspmessage(tvbuff_t *tvb, int offset, packet_info *pinfo,
- proto_tree *tree)
-{
- proto_tree *rtsp_tree = NULL;
- proto_tree *sub_tree = NULL;
- proto_item *ti = NULL;
- const guchar *line;
- gint next_offset;
- const guchar *linep, *lineend;
- int orig_offset;
- int first_linelen, linelen;
- int line_end_offset;
- int colon_offset;
- gboolean is_request_or_reply;
- gboolean body_requires_content_len;
- gboolean saw_req_resp_or_header;
- guchar c;
- rtsp_type_t rtsp_type;
- gboolean is_header;
- int is_sdp = FALSE;
- int datalen;
- int content_length;
- int reported_datalen;
- int value_offset;
- int value_len;
- e164_info_t e164_info;
- /*
- * Is this a request or response?
- *
- * Note that "tvb_find_line_end()" will return a value that
- * is not longer than what's in the buffer, so the
- * "tvb_get_ptr()" call won't throw an exception.
- */
- first_linelen = tvb_find_line_end(tvb, offset,
- tvb_ensure_length_remaining(tvb, offset), &next_offset,
- FALSE);
- /*
- * Is the first line a request or response?
- */
- line = tvb_get_ptr(tvb, offset, first_linelen);
- is_request_or_reply = is_rtsp_request_or_reply(line, first_linelen,
- &rtsp_type);
- if (is_request_or_reply) {
- /*
- * Yes, it's a request or response.
- * Do header desegmentation if we've been told to,
- * and do body desegmentation if we've been told to and
- * we find a Content-Length header.
- */
- if (!req_resp_hdrs_do_reassembly(tvb, pinfo,
- rtsp_desegment_headers, rtsp_desegment_body)) {
- /*
- * More data needed for desegmentation.
- */
- return -1;
- }
- }
-
- /*
- * RFC 2326 says that a content length must be specified
- * in requests that have a body, although section 4.4 speaks
- * of a server closing the connection indicating the end of
- * a reply body.
- *
- * We assume that an absent content length in a request means
- * that we don't have a body, and that an absent content length
- * in a reply means that the reply body runs to the end of
- * the connection. If the first line is neither, we assume
- * that whatever follows a blank line should be treated as a
- * body; there's not much else we can do, as we're jumping
- * into the message in the middle.
- *
- * XXX - if there was no Content-Length entity header, we should
- * accumulate all data until the end of the connection.
- * That'd require that the TCP dissector call subdissectors
- * for all frames with FIN, even if they contain no data,
- * which would require subdissectors to deal intelligently
- * with empty segments.
- */
- if (rtsp_type == RTSP_REQUEST)
- body_requires_content_len = TRUE;
- else
- body_requires_content_len = FALSE;
-
- if (check_col(pinfo->cinfo, COL_PROTOCOL))
- col_set_str(pinfo->cinfo, COL_PROTOCOL, "RTSP");
- if (check_col(pinfo->cinfo, COL_INFO)) {
- /*
- * Put the first line from the buffer into the summary
- * if it's an RTSP request or reply (but leave out the
- * line terminator).
- * Otherwise, just call it a continuation.
- *
- * Note that "tvb_find_line_end()" will return a value that
- * is not longer than what's in the buffer, so the
- * "tvb_get_ptr()" call won't throw an exception.
- */
- line = tvb_get_ptr(tvb, offset, first_linelen);
- if (is_request_or_reply)
- if ( rtsp_type == RTSP_REPLY ) {
- col_add_str(pinfo->cinfo, COL_INFO, "Reply: ");
- col_append_str(pinfo->cinfo, COL_INFO,
- format_text(line, first_linelen));
- }
- else
- col_add_str(pinfo->cinfo, COL_INFO,
- format_text(line, first_linelen));
-
- else
- col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
-
- }
-
- orig_offset = offset;
- if (tree) {
- ti = proto_tree_add_item(tree, proto_rtsp, tvb, offset, -1,
- FALSE);
- rtsp_tree = proto_item_add_subtree(ti, ett_rtsp);
- }
-
- /*
- * We haven't yet seen a Content-Length header.
- */
- content_length = -1;
-
- /*
- * Process the packet data, a line at a time.
- */
- saw_req_resp_or_header = FALSE; /* haven't seen anything yet */
- while (tvb_reported_length_remaining(tvb, offset) != 0) {
- /*
- * We haven't yet concluded that this is a header.
- */
- is_header = FALSE;
-
- /*
- * Find the end of the line.
- */
- linelen = tvb_find_line_end(tvb, offset,
- tvb_ensure_length_remaining(tvb, offset), &next_offset,
- FALSE);
- if (linelen < 0)
- return -1;
- line_end_offset = offset + linelen;
- /*
- * colon_offset may be -1
- */
- colon_offset = tvb_find_guint8(tvb, offset, linelen, ':');
-
-
- /*
- * Get a buffer that refers to the line.
- */
- line = tvb_get_ptr(tvb, offset, linelen);
- lineend = line + linelen;
-
- /*
- * OK, does it look like an RTSP request or response?
- */
- is_request_or_reply = is_rtsp_request_or_reply(line, linelen,
- &rtsp_type);
- if (is_request_or_reply)
- goto is_rtsp;
-
- /*
- * No. Does it look like a blank line (as would appear
- * at the end of an RTSP request)?
- */
- if (linelen == 0)
- goto is_rtsp; /* Yes. */
-
- /*
- * No. Does it look like a header?
- */
- linep = line;
- while (linep < lineend) {
- c = *linep++;
-
- /*
- * This must be a CHAR to be part of a token; that
- * means it must be ASCII.
- */
- if (!isascii(c))
- break; /* not ASCII, thus not a CHAR */
-
- /*
- * This mustn't be a CTL to be part of a token.
- *
- * XXX - what about leading LWS on continuation
- * lines of a header?
- */
- if (iscntrl(c))
- break; /* CTL, not part of a header */
-
- switch (c) {
-
- case '(':
- case ')':
- case '<':
- case '>':
- case '@':
- case ',':
- case ';':
- case '\\':
- case '"':
- case '/':
- 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 header.
- */
- goto not_rtsp;
-
- case ':':
- /*
- * This ends the token; we consider
- * this to be a header.
- */
- is_header = TRUE;
- goto is_rtsp;
-
- case ' ':
- case '\t':
- /*
- * LWS (RFC-2616, 4.2); continue the previous
- * header.
- */
- goto is_rtsp;
- }
- }
-
- /*
- * We haven't seen the colon, but everything else looks
- * OK for a header line.
- *
- * If we've already seen an RTSP request or response
- * line, or a header line, and we're at the end of
- * the tvbuff, we assume this is an incomplete header
- * line. (We quit this loop after seeing a blank line,
- * so if we've seen a request or response line, or a
- * header line, this is probably more of the request
- * or response we're presumably seeing. There is some
- * risk of false positives, but the same applies for
- * full request or response lines or header lines,
- * although that's less likely.)
- *
- * We throw an exception in that case, by checking for
- * the existence of the next byte after the last one
- * in the line. If it exists, "tvb_ensure_bytes_exist()"
- * throws no exception, and we fall through to the
- * "not RTSP" case. If it doesn't exist,
- * "tvb_ensure_bytes_exist()" will throw the appropriate
- * exception.
- */
- if (saw_req_resp_or_header)
- tvb_ensure_bytes_exist(tvb, offset, linelen + 1);
-
- not_rtsp:
- /*
- * We don't consider this part of an RTSP request or
- * reply, so we don't display it.
- */
- break;
-
- is_rtsp:
- /*
- * Process this line.
- */
- if (linelen == 0) {
- /*
- * This is a blank line, which means that
- * whatever follows it isn't part of this
- * request or reply.
- */
- proto_tree_add_text(rtsp_tree, tvb, offset,
- next_offset - offset, "%s",
- tvb_format_text(tvb, offset, next_offset - offset));
- offset = next_offset;
- break;
- }
-
- /*
- * Not a blank line - either a request, a reply, or a header
- * line.
- */
- saw_req_resp_or_header = TRUE;
- if (rtsp_tree) {
- ti = proto_tree_add_text(rtsp_tree, tvb, offset,
- next_offset - offset, "%s",
- tvb_format_text(tvb, offset, next_offset - offset));
-
- sub_tree = proto_item_add_subtree(ti, ett_rtsp_method);
-
- switch (rtsp_type) {
-
- case RTSP_REQUEST:
- process_rtsp_request(tvb, offset, line, linelen,
- sub_tree);
- break;
-
- case RTSP_REPLY:
- process_rtsp_reply(tvb, offset, line, linelen,
- sub_tree);
- break;
-
- case NOT_RTSP:
- break;
- }
- }
- if (is_header) {
- /*
- * Process some headers specially.
- */
-#define HDR_MATCHES(header) \
- (linelen > STRLEN_CONST(header) && \
- strncasecmp(line, (header), STRLEN_CONST(header)) == 0)
-
- if (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 (HDR_MATCHES(rtsp_content_type)) {
- /*
- * If the Content-Type: header says this
- * is SDP, dissect the payload as SDP.
- *
- * XXX - we should just do the same
- * sort of header processing
- * that HTTP does, and use the
- * "media_type" dissector table on
- * the content type.
- *
- * We should use those for Transport:
- * and Content-Length: as well (and
- * should process Content-Length: in
- * HTTP).
- */
- if (is_content_sdp(line, linelen))
- is_sdp = TRUE;
- } else if (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);
-
- } else if (HDR_MATCHES(rtsp_Session)) {
- /*
- * Extract the session string
-
- */
-
- if ( colon_offset != -1 ){
- /*
- * Skip whitespace after the colon.
- * (Code from SIP dissector )
- */
- value_offset = colon_offset + 1;
- while (value_offset < line_end_offset
- && ((c = tvb_get_guint8(tvb,
- value_offset)) == ' '
- || c == '\t'))
- value_offset++;
- /*
- * Put the value into the protocol tree
- */
- value_len = line_end_offset - value_offset;
- proto_tree_add_string(sub_tree, hf_rtsp_session,tvb,
- value_offset, value_len ,
- tvb_format_text(tvb, value_offset, value_len));
- }
-
- } else if (HDR_MATCHES(rtsp_X_Vig_Msisdn)) {
- /*
- * Extract the X_Vig_Msisdn string
- */
- if ( colon_offset != -1 ){
- /*
- * Skip whitespace after the colon.
- * (Code from SIP dissector )
- */
- value_offset = colon_offset + 1;
- while (value_offset < line_end_offset
- && ((c = tvb_get_guint8(tvb,
- value_offset)) == ' '
- || c == '\t'))
- value_offset++;
- /*
- * Put the value into the protocol tree
- */
- value_len = line_end_offset - value_offset;
- proto_tree_add_string(sub_tree, hf_rtsp_X_Vig_Msisdn,tvb,
- value_offset, value_len ,
- tvb_format_text(tvb, value_offset, value_len));
-
- e164_info.e164_number_type = CALLING_PARTY_NUMBER;
- e164_info.nature_of_address = 0;
-
- e164_info.E164_number_str = tvb_get_string(tvb, value_offset,
- value_len);
- e164_info.E164_number_length = value_len;
- dissect_e164_number(tvb, sub_tree, value_offset,
- value_len, e164_info);
- g_free(e164_info.E164_number_str);
-
-
- }
- }
-
- }
- 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 (or if a bad 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);
- reported_datalen = tvb_reported_length_remaining(tvb, offset);
- if (content_length != -1) {
- /*
- * Content length specified; display only that amount
- * as payload.
- */
- if (datalen > content_length)
- datalen = content_length;
-
- /*
- * XXX - limit the reported length in the tvbuff we'll
- * hand to a subdissector to be no greater than the
- * content length.
- *
- * We really need both unreassembled and "how long it'd
- * be if it were reassembled" lengths for tvbuffs, so
- * that we throw the appropriate exceptions for
- * "not enough data captured" (running past the length),
- * "packet needed reassembly" (within the length but
- * running past the unreassembled length), and
- * "packet is malformed" (running past the reassembled
- * length).
- */
- if (reported_datalen > content_length)
- reported_datalen = content_length;
- } else {
- /*
- * No content length specified; if this message doesn't
- * have a body if no content length is specified, process
- * nothing as payload.
- */
- if (body_requires_content_len)
- datalen = 0;
- }
-
- 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 "reported_datalen",
- * 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,
- reported_datalen);
- 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)",
- reported_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.
- */
- 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) == 0 &&
- (len == linelen || isspace(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(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(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(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;
-
- while (tvb_reported_length_remaining(tvb, offset) != 0) {
- 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,
- &ett_rtsp_method,
- };
- 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 }},
- { &hf_rtsp_session,
- { "Session", "rtsp.session", FT_STRING, BASE_NONE, NULL, 0,
- "", HFILL }},
- { &hf_rtsp_X_Vig_Msisdn,
- { "X-Vig-Msisdn", "X_Vig_Msisdn", FT_STRING, BASE_NONE, NULL, 0,
- "", HFILL }},
-
-
- };
- module_t *rtsp_module;
-
- 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 our configuration options, particularly our ports */
-
- rtsp_module = prefs_register_protocol(proto_rtsp, proto_reg_handoff_rtsp);
- prefs_register_uint_preference(rtsp_module, "tcp.port",
- "RTSP TCP Port",
- "Set the TCP port for RTSP messages",
- 10, &global_rtsp_tcp_port);
- prefs_register_uint_preference(rtsp_module, "tcp.alternate_port",
- "Alternate RTSP TCP Port",
- "Set the alternate TCP port for RTSP messages",
- 10, &global_rtsp_tcp_alternate_port);
- prefs_register_bool_preference(rtsp_module, "desegment_headers",
- "Desegment all RTSP headers\nspanning multiple TCP segments",
- "Whether the RTSP dissector should desegment all headers "
- "of a request spanning multiple TCP segments",
- &rtsp_desegment_headers);
- prefs_register_bool_preference(rtsp_module, "desegment_body",
- "Trust the \"Content-length:\" header and\ndesegment RTSP "
- "bodies\nspanning multiple TCP segments",
- "Whether the RTSP dissector should use the "
- "\"Content-length:\" value to desegment the body "
- "of a request spanning multiple TCP segments",
- &rtsp_desegment_body);
-
- register_init_routine(rtsp_init); /* register re-init routine */
-}
-
-void
-proto_reg_handoff_rtsp(void)
-{
- dissector_handle_t rtsp_handle;
- static int rtsp_prefs_initialized = FALSE;
-
- rtsp_handle = create_dissector_handle(dissect_rtsp, proto_rtsp);
-
- if (!rtsp_prefs_initialized) {
- rtsp_prefs_initialized = TRUE;
- }
- else {
- dissector_delete("tcp.port", tcp_port, rtsp_handle);
- dissector_delete("tcp.port", tcp_alternate_port, rtsp_handle);
- }
- /* Set our port number for future use */
-
- tcp_port = global_rtsp_tcp_port;
- tcp_alternate_port = global_rtsp_tcp_alternate_port;
-
- dissector_add("tcp.port", tcp_port, rtsp_handle);
- dissector_add("tcp.port", tcp_alternate_port, rtsp_handle);
-
- sdp_handle = find_dissector("sdp");
- rtp_handle = find_dissector("rtp");
- rtcp_handle = find_dissector("rtcp");
-}