1473 lines
50 KiB
C
1473 lines
50 KiB
C
/* packet-sip.c
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* Routines for the Session Initiation Protocol (SIP) dissection.
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* RFCs 3261-3264
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*
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* TODO: Pay attention to Content-Type: It might not always be SDP.
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* Content-Type is fixed, mixed/mode is not handled though.
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* hf_ display filters for headers of SIP extension RFCs:
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* Done for RFC 3265, RFC 3262
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* Use hash table for list of headers
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* Add sip msg body dissection based on Content-Type for:
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* SDP, MIME, and other types
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* Align SIP methods with recent Internet Drafts or RFC
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* (SIP INFO, rfc2976 - done)
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* (SIP SUBSCRIBE-NOTIFY - done)
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* (SIP REFER - done)
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* check for other
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*
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* Copyright 2000, Heikki Vatiainen <hessu@cs.tut.fi>
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* Copyright 2001, Jean-Francois Mule <jfm@cablelabs.com>
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*
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* $Id: packet-sip.c,v 1.53 2004/01/02 02:03:39 guy 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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* Copied from packet-cops.c
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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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "prefs.h"
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#include <glib.h>
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#include <epan/packet.h>
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#define TCP_PORT_SIP 5060
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#define UDP_PORT_SIP 5060
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/* Initialize the protocol and registered fields */
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static gint proto_sip = -1;
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static gint proto_raw_sip = -1;
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static gint hf_msg_hdr = -1;
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static gint hf_Method = -1;
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static gint hf_Request_Line = -1;
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static gint hf_Status_Code = -1;
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static gint hf_Status_Line = -1;
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static gint hf_sip_to_addr = -1;
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static gint hf_sip_from_addr = -1;
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static gint hf_sip_tag = -1;
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/* Initialize the subtree pointers */
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static gint ett_sip = -1;
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static gint ett_sip_reqresp = -1;
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static gint ett_sip_hdr = -1;
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static gint ett_raw_text = -1;
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static gint ett_sip_element = -1;
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static gint ett_sip_message_body = -1;
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/* PUBLISH method added as per http://www.ietf.org/internet-drafts/draft-ietf-sip-publish-01.txt */
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static const char *sip_methods[] = {
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"<Invalid method>", /* Pad so that the real methods start at index 1 */
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"ACK",
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"BYE",
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"CANCEL",
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"DO",
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"INFO",
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"INVITE",
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"MESSAGE",
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"NOTIFY",
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"OPTIONS",
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"PRACK",
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"QAUTH",
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"REFER",
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"REGISTER",
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"SPRACK",
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"SUBSCRIBE",
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"UPDATE",
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"PUBLISH"
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};
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/* from RFC 3261 */
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/* Updated with info from http://www.iana.org/assignments/sip-parameters */
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/* (last updated 2003-10-31) */
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/* Added two headsers ( Etag and If-Match )from http://www.ietf.org/internet-drafts/draft-ietf-sip-publish-01.txt */
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typedef struct {
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char *name;
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char *compact_name;
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} sip_header_t;
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static const sip_header_t sip_headers[] = {
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{ "Unknown-header", NULL }, /* Pad so that the real headers start at index 1 */
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{ "Accept", NULL },
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{ "Accept-Encoding", NULL },
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{ "Accept-Language", NULL },
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{ "Alert-Info", NULL },
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{ "Allow", NULL },
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{ "Allow-Events", NULL },
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{ "Authentication-Info", NULL },
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{ "Authorization", NULL },
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{ "Call-ID", "i" },
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{ "Call-Info", NULL },
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{ "Contact", "m" },
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{ "Content-Disposition", NULL },
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{ "Content-Encoding", "e" },
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{ "Content-Language", NULL },
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{ "Content-Length", "l" },
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{ "Content-Type", "c" },
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{ "CSeq", NULL },
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{ "Date", NULL },
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{ "Error-Info", NULL },
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{ "Event", "o" },
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{ "Expires", NULL },
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{ "From", "f" },
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{ "In-Reply-To", NULL },
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{ "Max-Forwards", NULL },
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{ "MIME-Version", NULL },
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{ "Min-Expires", NULL },
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{ "Organization", NULL },
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{ "Priority", NULL },
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{ "Proxy-Authenticate", NULL },
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{ "Proxy-Authorization", NULL },
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{ "Proxy-Require", NULL },
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{ "RAck", NULL },
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{ "RSeq", NULL },
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{ "Record-Route", NULL },
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{ "Reply-To", NULL },
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{ "Require", NULL },
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{ "Retry-After", NULL },
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{ "Route", NULL },
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{ "Server", NULL },
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{ "Subject", "s" },
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{ "Subscription-State", NULL },
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{ "Supported", "k" },
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{ "Timestamp", NULL },
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{ "To", "t" },
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{ "Unsupported", NULL },
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{ "User-Agent", NULL },
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{ "Via", "v" },
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{ "Warning", NULL },
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{ "WWW-Authenticate", NULL },
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{ "P-Access-Network-Info", NULL }, /* RFC3455 */
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{ "P-Asserted-Identity", NULL }, /* RFC3325 */
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{ "P-Associated-URI", NULL }, /* RFC3455 */
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{ "P-Called-Party-ID", NULL }, /* RFC3455 */
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{ "P-Charging-Function-Addresses",NULL }, /* RFC3455 */
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{ "P-Charging-Vector", NULL }, /* RFC3455 */
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{ "P-DCS-Trace-Party-ID", NULL }, /* RFC3603 */
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{ "P-DCS-OSPS", NULL }, /* RFC3603 */
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{ "P-DCS-Billing-Info", NULL }, /* RFC3603 */
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{ "P-DCS-LAES", NULL }, /* RFC3603 */
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{ "P-DCS-Redirect", NULL }, /* RFC3603 */
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{ "P-Media-Authorization", NULL }, /* RFC3313 */
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{ "P-Preferred-Identity", NULL }, /* RFC3325 */
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{ "P-Visited-Network-ID", NULL }, /* RFC3455 */
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{ "Path", NULL }, /* RFC3327 */
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{ "Privacy", NULL }, /* RFC3323 */
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{ "Reason", NULL }, /* RFC3326 */
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{ "Refer-To", "r" }, /* RFC3515 */
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{ "Service-Route", NULL }, /* RFC3608 */
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{ "ETag", NULL }, /* draft-ietf-sip-publish-01 */
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{ "If-Match", NULL }, /* draft-ietf-sip-publish-01 */
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};
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#define POS_ACCEPT 1
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#define POS_ACCEPT_ENCODING 2
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#define POS_ACCEPT_LANGUAGE 3
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#define POS_ALERT_INFO 4
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#define POS_ALLOW 5
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#define POS_ALLOW_EVENTS 6
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#define POS_AUTHENTICATION_INFO 7
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#define POS_AUTHORIZATION 8
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#define POS_CALL_ID 9
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#define POS_CALL_INFO 10
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#define POS_CONTACT 11
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#define POS_CONTENT_DISPOSITION 12
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#define POS_CONTENT_ENCODING 13
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#define POS_CONTENT_LANGUAGE 14
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#define POS_CONTENT_LENGTH 15
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#define POS_CONTENT_TYPE 16
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#define POS_CSEQ 17
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#define POS_DATE 18
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#define POS_ERROR_INFO 19
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#define POS_EVENT 20
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#define POS_EXPIRES 21
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#define POS_FROM 22
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#define POS_IN_REPLY_TO 23
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#define POS_MAX_FORWARDS 24
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#define POS_MIME_VERSION 25
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#define POS_MIN_EXPIRES 26
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#define POS_ORGANIZATION 27
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#define POS_PRIORITY 28
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#define POS_PROXY_AUTHENTICATE 29
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#define POS_PROXY_AUTHORIZATION 30
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#define POS_PROXY_REQUIRE 31
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#define POS_RACK 32
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#define POS_RSEQ 33
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#define POS_RECORD_ROUTE 34
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#define POS_REPLY_TO 35
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#define POS_REQUIRE 36
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#define POS_RETRY_AFTER 37
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#define POS_ROUTE 38
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#define POS_SERVER 39
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#define POS_SUBJECT 40
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#define POS_SUBSCRIPTION_STATE 41
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#define POS_SUPPORTED 42
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#define POS_TIMESTAMP 43
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#define POS_TO 44
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#define POS_UNSUPPORTED 45
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#define POS_USER_AGENT 46
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#define POS_VIA 47
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#define POS_WARNING 48
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#define POS_WWW_AUTHENTICATE 49
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#define POS_P_ACCESS_NETWORK_INFO 50
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#define POS_P_ASSERTED_IDENTITY 51
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#define POS_P_ASSOCIATED_URI 52
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#define POS_P_CALLED_PARTY_ID 53
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#define POS_P_CHARGING_FUNCTION_ADDRESSES 54
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#define POS_P_CHARGING_VECTOR 55
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#define POS_P_DCS_TRACE_PARTY_ID 56
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#define POS_P_DCS_OSPS 57
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#define POS_P_DCS_BILLING_INFO 58
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#define POS_P_DCS_LAES 59
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#define POS_P_DCS_REDIRECT 60
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#define POS_P_MEDIA_AUTHORIZATION 61
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#define POS_P_PREFERRED_IDENTITY 62
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#define POS_P_VISITED_NETWORK_ID 63
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#define POS_PATH 64
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#define POS_PRIVACY 65
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#define POS_REASON 66
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#define POS_REFER_TO 67
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#define POS_SERVICE_ROUTE 68
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#define POS_ETAG 69
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#define POS_IF_MATCH 70
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static gint hf_header_array[] = {
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-1, /* "Unknown-header" - Pad so that the real headers start at index 1 */
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-1, /* "Accept" */
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-1, /* "Accept-Encoding" */
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-1, /* "Accept-Language" */
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-1, /* "Alert-Info" */
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-1, /* "Allow" */
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-1, /* "Allow-Events" - RFC 3265 */
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-1, /* "Authentication-Info" */
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-1, /* "Authorization" */
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-1, /* "Call-ID" */
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-1, /* "Call-Info" */
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-1, /* "Contact" */
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-1, /* "Content-Disposition" */
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-1, /* "Content-Encoding" */
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-1, /* "Content-Language" */
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-1, /* "Content-Length" */
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-1, /* "Content-Type" */
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-1, /* "CSeq" */
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-1, /* "Date" */
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-1, /* "Error-Info" */
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-1, /* "Expires" */
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-1, /* "Event" - RFC 3265 */
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-1, /* "From" */
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-1, /* "In-Reply-To" */
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-1, /* "Max-Forwards" */
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-1, /* "MIME-Version" */
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-1, /* "Min-Expires" */
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-1, /* "Organization" */
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-1, /* "Priority" */
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-1, /* "Proxy-Authenticate" */
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-1, /* "Proxy-Authorization" */
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-1, /* "Proxy-Require" */
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-1, /* "RAck" - RFC 3262 */
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-1, /* "RSeq" - RFC 3261 */
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-1, /* "Record-Route" */
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-1, /* "Reply-To" */
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-1, /* "Require" */
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-1, /* "Retry-After" */
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-1, /* "Route" */
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-1, /* "Server" */
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-1, /* "Subject" */
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-1, /* "Subscription-State" - RFC 3265 */
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-1, /* "Supported" */
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-1, /* "Timestamp" */
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-1, /* "To" */
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-1, /* "Unsupported" */
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-1, /* "User-Agent" */
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-1, /* "Via" */
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-1, /* "Warning" */
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-1, /* "WWW-Authenticate" */
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-1, /* "P-Access-Network-Info" - RFC3455 */
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-1, /* "P-Asserted-Identity" - RFC3325 */
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-1, /* "P-Associated-URI" - RFC3455 */
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-1, /* "P-Called-Party-ID" - RFC3455 */
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-1, /* "P-Charging-Function-Addresses" - RFC3455 */
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-1, /* "P-Charging-Vector" - RFC3455 */
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-1, /* "P-DCS-Trace-Party-ID" - RFC3603 */
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-1, /* "P-DCS-OSPS" - RFC3603 */
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-1, /* "P-DCS-Billing-Info" - RFC3603 */
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-1, /* "P-DCS-LAES" - RFC3603 */
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-1, /* "P-DCS-Redirect" - RFC3603 */
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-1, /* "P-Media-Authorization" - RFC3313 */
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-1, /* "P-Preferred-Identity" - RFC3325 */
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-1, /* "P-Visited-Network-ID" - RFC3455 */
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-1, /* "Path" - RFC3327 */
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-1, /* "Privacy" - RFC3323 */
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-1, /* "Reason" - RFC3326 */
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-1, /* "Refer-To" - RFC3515 */
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-1, /* "Service-Route" - RFC3608 */
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-1, /* "ETag" draft-ietf-sip-publish-01 */
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-1, /* "If-Match draft-ietf-sip-publish-01 */
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};
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/*
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* Type of line. It's either a SIP Request-Line, a SIP Status-Line, or
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* another type of line.
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*/
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typedef enum {
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REQUEST_LINE,
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STATUS_LINE,
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OTHER_LINE
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} line_type_t;
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/* global_sip_raw_text determines whether we are going to display */
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/* the raw text of the SIP message, much like the MEGACO dissector does. */
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static gboolean global_sip_raw_text = FALSE;
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static gboolean dissect_sip_common(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, gboolean is_heur);
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static line_type_t sip_parse_line(tvbuff_t *tvb, gint linelen,
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guint *token_1_len);
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static gboolean sip_is_known_request(tvbuff_t *tvb, int meth_offset,
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guint meth_len, guint *meth_idx);
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static gint sip_is_known_sip_header(tvbuff_t *tvb, int offset,
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guint header_len);
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static void dfilter_sip_request_line(tvbuff_t *tvb, proto_tree *tree,
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guint meth_len);
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static void dfilter_sip_status_line(tvbuff_t *tvb, proto_tree *tree);
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static void tvb_raw_text_add(tvbuff_t *tvb, proto_tree *tree);
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/* SIP content type and internet media type used by other dissectors are the same */
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/* List of nmediatypes from IANA at: http://www.iana.org/assignments/media-types/index.html */
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static dissector_table_t media_type_dissector_table;
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#define SIP2_HDR "SIP/2.0"
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#define SIP2_HDR_LEN (strlen (SIP2_HDR))
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/* Code to actually dissect the packets */
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static int
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dissect_sip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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if (!dissect_sip_common(tvb, pinfo, tree, FALSE))
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return 0;
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return tvb_length(tvb);
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}
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static void
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dissect_sip_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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dissect_sip_common(tvb, pinfo, tree, TRUE);
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}
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static gboolean
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dissect_sip_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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return dissect_sip_common(tvb, pinfo, tree, FALSE);
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}
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static gboolean
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dissect_sip_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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gboolean dissect_other_as_continuation)
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{
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int offset;
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gint next_offset, linelen;
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line_type_t line_type;
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tvbuff_t *next_tvb;
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gboolean is_known_request;
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gboolean found_match = FALSE;
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char *descr;
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guint token_1_len;
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guint current_method_idx = 0;
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proto_item *ts = NULL, *ti, *th = NULL, *sip_element_item;
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proto_tree *sip_tree = NULL, *reqresp_tree, *hdr_tree = NULL, *sip_element_tree, *message_body_tree;
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guchar contacts = 0, contact_is_star = 0, expires_is_0 = 0;
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char csec_method[16] = "";
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char *media_type_str = NULL;
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char *content_type_parameter_str = NULL;
|
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|
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/*
|
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* Note that "tvb_find_line_end()" will return a value that
|
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* is not longer than what's in the buffer, so the
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* "tvb_get_ptr()" calls below won't throw exceptions.
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*
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|
* Note that "tvb_strneql()" doesn't throw exceptions, so
|
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* "sip_parse_line()" won't throw an exception.
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*/
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offset = 0;
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linelen = tvb_find_line_end(tvb, 0, -1, &next_offset, FALSE);
|
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line_type = sip_parse_line(tvb, linelen, &token_1_len);
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if (line_type == OTHER_LINE) {
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/*
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* This is neither a SIP request nor response.
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*/
|
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if (!dissect_other_as_continuation) {
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/*
|
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* We were asked to reject this.
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|
*/
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return FALSE;
|
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}
|
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|
|
/*
|
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* Just dissect it as a continuation.
|
|
*/
|
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}
|
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|
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "SIP");
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switch (line_type) {
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case REQUEST_LINE:
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is_known_request = sip_is_known_request(tvb, 0, token_1_len, ¤t_method_idx);
|
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descr = is_known_request ? "Request" : "Unknown request";
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %s",
|
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descr,
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tvb_format_text(tvb, 0, linelen - SIP2_HDR_LEN - 1));
|
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}
|
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break;
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|
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case STATUS_LINE:
|
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descr = "Status";
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
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col_add_fstr(pinfo->cinfo, COL_INFO, "Status: %s",
|
|
tvb_format_text(tvb, SIP2_HDR_LEN + 1, linelen - SIP2_HDR_LEN - 1));
|
|
}
|
|
break;
|
|
|
|
case OTHER_LINE:
|
|
default: /* Squelch compiler complaints */
|
|
descr = "Continuation";
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
|
|
break;
|
|
}
|
|
if (tree) {
|
|
ts = proto_tree_add_item(tree, proto_sip, tvb, 0, -1, FALSE);
|
|
sip_tree = proto_item_add_subtree(ts, ett_sip);
|
|
|
|
switch (line_type) {
|
|
|
|
case REQUEST_LINE:
|
|
ti = proto_tree_add_string(sip_tree, hf_Request_Line, tvb, 0, linelen,
|
|
tvb_format_text(tvb, 0, linelen));
|
|
reqresp_tree = proto_item_add_subtree(ti, ett_sip_reqresp);
|
|
dfilter_sip_request_line(tvb, reqresp_tree, token_1_len);
|
|
break;
|
|
|
|
case STATUS_LINE:
|
|
ti = proto_tree_add_string(sip_tree, hf_Status_Line, tvb, 0, linelen,
|
|
tvb_format_text(tvb, 0, linelen));
|
|
reqresp_tree = proto_item_add_subtree(ti, ett_sip_reqresp);
|
|
dfilter_sip_status_line(tvb, reqresp_tree);
|
|
break;
|
|
|
|
case OTHER_LINE:
|
|
ti = proto_tree_add_text(sip_tree, tvb, 0, next_offset,
|
|
"%s line: %s", descr,
|
|
tvb_format_text(tvb, 0, linelen));
|
|
reqresp_tree = proto_item_add_subtree(ti, ett_sip_reqresp);
|
|
proto_tree_add_text(sip_tree, tvb, 0, -1,
|
|
"Continuation data");
|
|
return TRUE;
|
|
}
|
|
|
|
offset = next_offset;
|
|
th = proto_tree_add_item(sip_tree, hf_msg_hdr, tvb, offset, -1,
|
|
FALSE);
|
|
hdr_tree = proto_item_add_subtree(th, ett_sip_hdr);
|
|
}
|
|
|
|
/*
|
|
* Process the headers - if we're not building a protocol tree,
|
|
* we just do this to find the blank line separating the
|
|
* headers from the message body.
|
|
*/
|
|
next_offset = offset;
|
|
while (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
gint line_end_offset;
|
|
gint colon_offset;
|
|
gint semicolon_offset;
|
|
gint content_type_len, content_type_parameter_str_len;
|
|
gint header_len;
|
|
gint hf_index;
|
|
gint value_offset,tag_offset;
|
|
guchar c;
|
|
size_t value_len;
|
|
char *value;
|
|
|
|
linelen = tvb_find_line_end(tvb, offset, -1, &next_offset,
|
|
FALSE);
|
|
if (linelen == 0) {
|
|
/*
|
|
* This is a blank line separating the
|
|
* message header from the message body.
|
|
*/
|
|
break;
|
|
}
|
|
line_end_offset = offset + linelen;
|
|
colon_offset = tvb_find_guint8(tvb, offset, linelen, ':');
|
|
if (colon_offset == -1) {
|
|
/*
|
|
* Malformed header - no colon after the name.
|
|
*/
|
|
proto_tree_add_text(hdr_tree, tvb, offset,
|
|
next_offset - offset, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
} else {
|
|
header_len = colon_offset - offset;
|
|
hf_index = sip_is_known_sip_header(tvb,
|
|
offset, header_len);
|
|
|
|
if (hf_index == -1) {
|
|
proto_tree_add_text(hdr_tree, tvb,
|
|
offset, next_offset - offset, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
} else {
|
|
/*
|
|
* Skip whitespace after the colon.
|
|
*/
|
|
value_offset = colon_offset + 1;
|
|
while (value_offset < line_end_offset
|
|
&& ((c = tvb_get_guint8(tvb,
|
|
value_offset)) == ' '
|
|
|| c == '\t'))
|
|
value_offset++;
|
|
/*
|
|
* Fetch the value.
|
|
*/
|
|
value_len = line_end_offset - value_offset;
|
|
value = tvb_get_string(tvb, value_offset,
|
|
value_len);
|
|
|
|
/*
|
|
* Add it to the protocol tree,
|
|
* but display the line as is.
|
|
*/
|
|
switch ( hf_index ) {
|
|
|
|
case POS_TO :
|
|
sip_element_item = proto_tree_add_string_format(hdr_tree,
|
|
hf_header_array[hf_index], tvb,
|
|
offset, next_offset - offset,
|
|
value, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
sip_element_tree = proto_item_add_subtree( sip_element_item,
|
|
ett_sip_element);
|
|
tag_offset = tvb_find_guint8(tvb, offset,linelen, ';');
|
|
if ( tag_offset != -1){
|
|
tag_offset = tag_offset + 1;
|
|
c = tvb_get_guint8(tvb,tag_offset);
|
|
if ( c == 't' ){/* tag found */
|
|
proto_tree_add_string(sip_element_tree,
|
|
hf_sip_to_addr, tvb,
|
|
value_offset, (tag_offset - value_offset - 1),
|
|
tvb_format_text(tvb, value_offset,
|
|
( tag_offset - value_offset - 1)));
|
|
tag_offset = tvb_find_guint8(tvb, tag_offset,linelen, '=') + 1;
|
|
proto_tree_add_string(sip_element_tree,
|
|
hf_sip_tag, tvb,
|
|
tag_offset, (line_end_offset - tag_offset),
|
|
tvb_format_text(tvb, tag_offset, (line_end_offset - tag_offset)));
|
|
|
|
}
|
|
else {
|
|
proto_tree_add_string_format(sip_element_tree,
|
|
hf_sip_to_addr, tvb,
|
|
offset, line_end_offset - offset,
|
|
value, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
}/* if c= t */
|
|
} /* if tag offset */
|
|
break;
|
|
|
|
case POS_FROM :
|
|
sip_element_item = proto_tree_add_string_format(hdr_tree,
|
|
hf_header_array[hf_index], tvb,
|
|
offset, next_offset - offset,
|
|
value, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
sip_element_tree = proto_item_add_subtree( sip_element_item, ett_sip_element);
|
|
tag_offset = tvb_find_guint8(tvb, offset,linelen, ';');
|
|
if ( tag_offset != -1){
|
|
tag_offset = tag_offset + 1;
|
|
c = tvb_get_guint8(tvb,tag_offset);
|
|
if ( c == 't' ){/* tag found */
|
|
proto_tree_add_string(sip_element_tree,
|
|
hf_sip_from_addr, tvb,
|
|
value_offset, (tag_offset - value_offset - 1),
|
|
tvb_format_text(tvb, value_offset, ( tag_offset - value_offset - 1)));
|
|
tag_offset = tvb_find_guint8(tvb, offset,linelen, '=') + 1;
|
|
proto_tree_add_string(sip_element_tree,
|
|
hf_sip_tag, tvb,
|
|
tag_offset, (line_end_offset - tag_offset),
|
|
tvb_format_text(tvb, tag_offset, (line_end_offset - tag_offset)));
|
|
}
|
|
else {
|
|
tag_offset = tvb_find_guint8(tvb, tag_offset,linelen, ';');
|
|
if ( tag_offset != -1){
|
|
tag_offset = tag_offset + 1;
|
|
c = tvb_get_guint8(tvb,tag_offset);
|
|
if ( c == 't' ){/* tag found */
|
|
proto_tree_add_string(sip_element_tree,
|
|
hf_sip_from_addr, tvb,
|
|
value_offset, (tag_offset - value_offset - 1),
|
|
tvb_format_text(tvb, value_offset, ( tag_offset - value_offset - 1)));
|
|
tag_offset = tvb_find_guint8(tvb, tag_offset,linelen, '=') + 1;
|
|
proto_tree_add_string(sip_element_tree,
|
|
hf_sip_tag, tvb,
|
|
tag_offset, (line_end_offset - tag_offset),
|
|
tvb_format_text(tvb, tag_offset, (line_end_offset - tag_offset)));
|
|
}
|
|
}
|
|
}/* if c= t */
|
|
} /* if tag offset */
|
|
break;
|
|
|
|
case POS_CSEQ :
|
|
/* Extract method name from value */
|
|
for (value_offset = 0; value_offset < (gint)strlen(value); value_offset++)
|
|
{
|
|
if (isalpha(value[value_offset]))
|
|
{
|
|
strcpy(csec_method,value+value_offset);
|
|
break;
|
|
}
|
|
}
|
|
/* Add 'CSeq' string item to tree */
|
|
proto_tree_add_string_format(hdr_tree,
|
|
hf_header_array[hf_index], tvb,
|
|
offset, next_offset - offset,
|
|
value, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
break;
|
|
|
|
case POS_EXPIRES :
|
|
if (strcmp(value, "0") == 0)
|
|
{
|
|
expires_is_0 = 1;
|
|
}
|
|
/* Add 'Expires' string item to tree */
|
|
proto_tree_add_string_format(hdr_tree,
|
|
hf_header_array[hf_index], tvb,
|
|
offset, next_offset - offset,
|
|
value, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
break;
|
|
|
|
/*
|
|
* Content-Type is the same as Internet
|
|
* media type used by other dissectors,
|
|
* appropriate dissector found by
|
|
* lookup in "media_type" dissector table.
|
|
*/
|
|
case POS_CONTENT_TYPE :
|
|
proto_tree_add_string_format(hdr_tree,
|
|
hf_header_array[hf_index], tvb,
|
|
offset, next_offset - offset,
|
|
value, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
content_type_len = value_len;
|
|
semicolon_offset = tvb_find_guint8(tvb, value_offset,linelen, ';');
|
|
if ( semicolon_offset != -1) {
|
|
content_type_len = semicolon_offset - value_offset;
|
|
content_type_parameter_str_len = linelen - semicolon_offset;
|
|
content_type_parameter_str = tvb_get_string(tvb, semicolon_offset + 1, content_type_parameter_str_len);
|
|
}
|
|
media_type_str = tvb_get_string(tvb, value_offset, content_type_len);
|
|
break;
|
|
|
|
case POS_CONTACT :
|
|
contacts++;
|
|
if (strcmp(value, "*") == 0)
|
|
{
|
|
contact_is_star = 1;
|
|
}
|
|
/* Fall through to default case to add string to tree */
|
|
|
|
default :
|
|
proto_tree_add_string_format(hdr_tree,
|
|
hf_header_array[hf_index], tvb,
|
|
offset, next_offset - offset,
|
|
value, "%s",
|
|
tvb_format_text(tvb, offset, linelen));
|
|
break;
|
|
}/* end switch */
|
|
g_free(value);
|
|
}/*if HF_index */
|
|
}/* if colon_offset */
|
|
offset = next_offset;
|
|
}/* End while */
|
|
|
|
if (tvb_offset_exists(tvb, next_offset)) {
|
|
|
|
/*
|
|
* There's a message body starting at "next_offset".
|
|
* Set the length of the SIP portion and of the
|
|
* header item.
|
|
*/
|
|
proto_item_set_end(ts, tvb, next_offset);
|
|
proto_item_set_end(th, tvb, next_offset);
|
|
next_tvb = tvb_new_subset(tvb, next_offset, -1, -1);
|
|
ti = proto_tree_add_text(sip_tree, next_tvb, 0, -1,
|
|
"Message body");
|
|
message_body_tree = proto_item_add_subtree(ti, ett_sip_message_body);
|
|
|
|
/* give the content type parameters to sub dissectors */
|
|
|
|
if ( media_type_str != NULL ) {
|
|
pinfo->private_data = content_type_parameter_str;
|
|
found_match = dissector_try_string(media_type_dissector_table,
|
|
media_type_str,
|
|
next_tvb, pinfo,
|
|
message_body_tree);
|
|
g_free(media_type_str);
|
|
g_free(content_type_parameter_str);
|
|
/* If no match dump as text */
|
|
}
|
|
if ( found_match != TRUE )
|
|
{
|
|
offset = 0;
|
|
while (tvb_offset_exists(next_tvb, offset)) {
|
|
tvb_find_line_end(next_tvb, offset, -1, &next_offset, FALSE);
|
|
linelen = next_offset - offset;
|
|
proto_tree_add_text(message_body_tree, next_tvb, offset, linelen,
|
|
"%s", tvb_format_text(next_tvb, offset, linelen));
|
|
offset = next_offset;
|
|
}/* end while */
|
|
}
|
|
}
|
|
|
|
|
|
/* Add to info column interesting things learned from header fields. */
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
/* Registration requests */
|
|
if (strcmp(sip_methods[current_method_idx], "REGISTER") == 0)
|
|
{
|
|
if (contact_is_star && expires_is_0)
|
|
{
|
|
col_append_str(pinfo->cinfo, COL_INFO, " (remove all bindings)");
|
|
}
|
|
else
|
|
if (!contacts)
|
|
{
|
|
col_append_str(pinfo->cinfo, COL_INFO, " (fetch bindings)");
|
|
}
|
|
}
|
|
|
|
/* Registration responses */
|
|
if (line_type == STATUS_LINE && (strcmp(csec_method, "REGISTER") == 0))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (%d bindings)", contacts);
|
|
}
|
|
}
|
|
|
|
if (global_sip_raw_text)
|
|
tvb_raw_text_add(tvb, tree);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Display filter for SIP Request-Line */
|
|
static void
|
|
dfilter_sip_request_line(tvbuff_t *tvb, proto_tree *tree, guint meth_len)
|
|
{
|
|
char *string;
|
|
|
|
/*
|
|
* We know we have the entire method; otherwise, "sip_parse_line()"
|
|
* would have returned OTHER_LINE.
|
|
*/
|
|
string = tvb_get_string(tvb, 0, meth_len);
|
|
proto_tree_add_string(tree, hf_Method, tvb, 0, meth_len, string);
|
|
g_free(string);
|
|
}
|
|
|
|
/* Display filter for SIP Status-Line */
|
|
static void
|
|
dfilter_sip_status_line(tvbuff_t *tvb, proto_tree *tree)
|
|
{
|
|
char string[3+1];
|
|
|
|
/*
|
|
* We know we have the entire status code; otherwise,
|
|
* "sip_parse_line()" would have returned OTHER_LINE.
|
|
* We also know that we have a version string followed by a
|
|
* space at the beginning of the line, for the same reason.
|
|
*/
|
|
tvb_memcpy(tvb, (guint8 *)string, SIP2_HDR_LEN + 1, 3);
|
|
string[3] = '\0';
|
|
proto_tree_add_string(tree, hf_Status_Code, tvb, SIP2_HDR_LEN + 1,
|
|
3, string);
|
|
}
|
|
|
|
/* From section 4.1 of RFC 2543:
|
|
*
|
|
* Request-Line = Method SP Request-URI SP SIP-Version CRLF
|
|
*
|
|
* From section 5.1 of RFC 2543:
|
|
*
|
|
* Status-Line = SIP-version SP Status-Code SP Reason-Phrase CRLF
|
|
*/
|
|
static line_type_t
|
|
sip_parse_line(tvbuff_t *tvb, gint linelen, guint *token_1_lenp)
|
|
{
|
|
gint space_offset;
|
|
guint token_1_len;
|
|
gint token_2_start;
|
|
guint token_2_len;
|
|
gint token_3_start;
|
|
guint token_3_len;
|
|
gint colon_pos;
|
|
|
|
space_offset = tvb_find_guint8(tvb, 0, -1, ' ');
|
|
if (space_offset <= 0) {
|
|
/*
|
|
* Either there's no space in the line (which means
|
|
* the line is empty or doesn't have a token followed
|
|
* by a space; neither is valid for a request or status), or
|
|
* the first character in the line is a space (meaning
|
|
* the method is empty, which isn't valid for a request,
|
|
* or the SIP version is empty, which isn't valid for a
|
|
* status).
|
|
*/
|
|
return OTHER_LINE;
|
|
}
|
|
token_1_len = space_offset;
|
|
token_2_start = space_offset + 1;
|
|
space_offset = tvb_find_guint8(tvb, token_2_start, -1, ' ');
|
|
if (space_offset == -1) {
|
|
/*
|
|
* There's no space after the second token, so we don't
|
|
* have a third token.
|
|
*/
|
|
return OTHER_LINE;
|
|
}
|
|
token_2_len = space_offset - token_2_start;
|
|
token_3_start = space_offset + 1;
|
|
token_3_len = linelen - token_3_start;
|
|
|
|
*token_1_lenp = token_1_len;
|
|
|
|
/*
|
|
* Is the first token a version string?
|
|
*/
|
|
if (token_1_len == SIP2_HDR_LEN &&
|
|
tvb_strneql(tvb, 0, SIP2_HDR, SIP2_HDR_LEN) == 0) {
|
|
/*
|
|
* Yes, so this is either a Status-Line or something
|
|
* else other than a Request-Line. To be a Status-Line,
|
|
* the second token must be a 3-digit number.
|
|
*/
|
|
if (token_2_len != 3) {
|
|
/*
|
|
* We don't have 3-character status code.
|
|
*/
|
|
return OTHER_LINE;
|
|
}
|
|
if (!isdigit(tvb_get_guint8(tvb, token_2_start)) ||
|
|
!isdigit(tvb_get_guint8(tvb, token_2_start + 1)) ||
|
|
!isdigit(tvb_get_guint8(tvb, token_2_start + 2))) {
|
|
/*
|
|
* 3 characters yes, 3 digits no.
|
|
*/
|
|
return OTHER_LINE;
|
|
}
|
|
return STATUS_LINE;
|
|
} else {
|
|
/*
|
|
* No, so this is either a Request-Line or something
|
|
* other than a Status-Line. To be a Request-Line, the
|
|
* second token must be a URI and the third token must
|
|
* be a version string.
|
|
*/
|
|
if (token_2_len < 3) {
|
|
/*
|
|
* We don't have a URI consisting of at least 3
|
|
* characters.
|
|
*/
|
|
return OTHER_LINE;
|
|
}
|
|
colon_pos = tvb_find_guint8(tvb, token_2_start + 1, -1, ':');
|
|
if (colon_pos == -1) {
|
|
/*
|
|
* There is no colon after the method, so the URI
|
|
* doesn't have a colon in it, so it's not valid.
|
|
*/
|
|
return OTHER_LINE;
|
|
}
|
|
if (colon_pos >= token_3_start) {
|
|
/*
|
|
* The colon is in the version string, not the URI.
|
|
*/
|
|
return OTHER_LINE;
|
|
}
|
|
/* XXX - Check for a proper URI prefix? */
|
|
if (token_3_len != SIP2_HDR_LEN ||
|
|
tvb_strneql(tvb, token_3_start, SIP2_HDR, SIP2_HDR_LEN) == -1) {
|
|
/*
|
|
* The version string isn't an SIP version 2.0 version
|
|
* string.
|
|
*/
|
|
return OTHER_LINE;
|
|
}
|
|
return REQUEST_LINE;
|
|
}
|
|
}
|
|
|
|
static gboolean sip_is_known_request(tvbuff_t *tvb, int meth_offset,
|
|
guint meth_len, guint *meth_idx)
|
|
{
|
|
guint i;
|
|
|
|
for (i = 1; i < array_length(sip_methods); i++) {
|
|
if (meth_len == strlen(sip_methods[i]) &&
|
|
tvb_strneql(tvb, meth_offset, sip_methods[i], meth_len) == 0)
|
|
{
|
|
*meth_idx = i;
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Returns index of method in sip_headers */
|
|
static gint sip_is_known_sip_header(tvbuff_t *tvb, int offset, guint header_len)
|
|
{
|
|
guint i;
|
|
|
|
for (i = 1; i < array_length(sip_headers); i++) {
|
|
if (header_len == strlen(sip_headers[i].name) &&
|
|
tvb_strncaseeql(tvb, offset, sip_headers[i].name, header_len) == 0)
|
|
return i;
|
|
if (sip_headers[i].compact_name != NULL &&
|
|
header_len == strlen(sip_headers[i].compact_name) &&
|
|
tvb_strncaseeql(tvb, offset, sip_headers[i].compact_name, header_len) == 0)
|
|
return i;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Display the entire message as raw text.
|
|
*/
|
|
static void
|
|
tvb_raw_text_add(tvbuff_t *tvb, proto_tree *tree)
|
|
{
|
|
proto_tree *raw_tree;
|
|
proto_item *ti;
|
|
int offset, next_offset, linelen;
|
|
|
|
ti = proto_tree_add_item(tree, proto_raw_sip, tvb, 0, -1, FALSE);
|
|
raw_tree = proto_item_add_subtree(ti, ett_raw_text);
|
|
|
|
offset = 0;
|
|
|
|
while (tvb_offset_exists(tvb, offset)) {
|
|
tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
|
|
linelen = next_offset - offset;
|
|
proto_tree_add_text(raw_tree, tvb, offset, linelen,
|
|
"%s", tvb_format_text(tvb, offset, linelen));
|
|
offset = next_offset;
|
|
}
|
|
}
|
|
|
|
/* Register the protocol with Ethereal */
|
|
void proto_register_sip(void)
|
|
{
|
|
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_msg_hdr,
|
|
{ "Message Header", "sip.msg_hdr",
|
|
FT_NONE, 0, NULL, 0,
|
|
"Message Header in SIP message", HFILL }
|
|
},
|
|
{ &hf_Method,
|
|
{ "Method", "sip.Method",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"SIP Method", HFILL }
|
|
},
|
|
{ &hf_Request_Line,
|
|
{ "Request-Line", "sip.Request-Line",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"SIP Request-Line", HFILL }
|
|
},
|
|
{ &hf_Status_Code,
|
|
{ "Status-Code", "sip.Status-Code",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"SIP Status Code", HFILL }
|
|
},
|
|
{ &hf_Status_Line,
|
|
{ "Status-Line", "sip.Status-Line",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"SIP Status-Line", HFILL }
|
|
},
|
|
{ &hf_sip_to_addr,
|
|
{ "SIP to address", "sip.from_addr",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: from addr", HFILL }
|
|
},
|
|
{ &hf_sip_from_addr,
|
|
{ "SIP from address", "sip.to_addr",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: to addr", HFILL }
|
|
},
|
|
{ &hf_sip_tag,
|
|
{ "SIP tag", "sip.tag",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: tag", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ACCEPT],
|
|
{ "Accept", "sip.Accept",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Accept Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ACCEPT_ENCODING],
|
|
{ "Accept-Encoding", "sip.Accept-Encoding",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Accept-Encoding Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ACCEPT_LANGUAGE],
|
|
{ "Accept-Language", "sip.Accept-Language",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Accept-Language Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ALERT_INFO],
|
|
{ "Alert-Info", "sip.Alert-Info",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Alert-Info Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ALLOW],
|
|
{ "Allow", "sip.Allow",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Allow Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ALLOW_EVENTS],
|
|
{ "Allow-Events", "sip.Allow-Events",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3265: Allow-Events Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_AUTHENTICATION_INFO],
|
|
{ "Authentication-Info", "sip.Authentication-Info",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Authentication-Info Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_AUTHORIZATION],
|
|
{ "Authorization", "sip.Authorization",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Authorization Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CALL_ID],
|
|
{ "Call-ID", "sip.Call-ID",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Call-ID Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CALL_INFO],
|
|
{ "Call-Info", "sip.Call-Info",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Call-Info Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CONTACT],
|
|
{ "Contact", "sip.Contact",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Contact Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CONTENT_DISPOSITION],
|
|
{ "Content-Disposition", "sip.Content-Disposition",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Content-Disposition Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CONTENT_ENCODING],
|
|
{ "Content-Encoding", "sip.Content-Encoding",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Content-Encoding Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CONTENT_LANGUAGE],
|
|
{ "Content-Language", "sip.Content-Language",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Content-Language Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CONTENT_LENGTH],
|
|
{ "Content-Length", "sip.Content-Length",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Content-Length Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CONTENT_TYPE],
|
|
{ "Content-Type", "sip.Content-Type",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Content-Type Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_CSEQ],
|
|
{ "CSeq", "sip.CSeq",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: CSeq Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_DATE],
|
|
{ "Date", "sip.Date",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Date Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ERROR_INFO],
|
|
{ "Error-Info", "sip.Error-Info",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Error-Info Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_EVENT],
|
|
{ "Event", "sip.Event",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3265: Event Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_EXPIRES],
|
|
{ "Expires", "sip.Expires",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Expires Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_FROM],
|
|
{ "From", "sip.From",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: From Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_IN_REPLY_TO],
|
|
{ "In-Reply-To", "sip.In-Reply-To",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: In-Reply-To Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_MAX_FORWARDS],
|
|
{ "Max-Forwards", "sip.Max-Forwards",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Max-Forwards Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_MIME_VERSION],
|
|
{ "MIME-Version", "sip.MIME-Version",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: MIME-Version Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_MIN_EXPIRES],
|
|
{ "Min-Expires", "sip.Min-Expires",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Min-Expires Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ORGANIZATION],
|
|
{ "Organization", "sip.Organization",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Organization Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_PRIORITY],
|
|
{ "Priority", "sip.Priority",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Priority Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_PROXY_AUTHENTICATE],
|
|
{ "Proxy-Authenticate", "sip.Proxy-Authenticate",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Proxy-Authenticate Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_PROXY_AUTHORIZATION],
|
|
{ "Proxy-Authorization", "sip.Proxy-Authorization",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Proxy-Authorization Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_RACK],
|
|
{ "RAck", "sip.RAck",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3262: RAck Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_RSEQ],
|
|
{ "RSeq", "sip.RSeq",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3262: RSeq Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_PROXY_REQUIRE],
|
|
{ "Proxy-Require", "sip.Proxy-Require",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Proxy-Require Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_RECORD_ROUTE],
|
|
{ "Record-Route", "sip.Record-Route",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Record-Route Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_REPLY_TO],
|
|
{ "Reply-To", "sip.Reply-To",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Reply-To Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_REQUIRE],
|
|
{ "Require", "sip.Require",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Require Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_RETRY_AFTER],
|
|
{ "Retry-After", "sip.Retry-After",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Retry-After Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_ROUTE],
|
|
{ "Route", "sip.Route",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Route Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_SERVER],
|
|
{ "Server", "sip.Server",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Server Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_SUBJECT],
|
|
{ "Subject", "sip.Subject",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Subject Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_SUBSCRIPTION_STATE],
|
|
{ "Subscription-State", "sip.Subscription-State",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3265: Subscription-State Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_SUPPORTED],
|
|
{ "Supported", "sip.Supported",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Supported Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_TIMESTAMP],
|
|
{ "Timestamp", "sip.Timestamp",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Timestamp Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_TO],
|
|
{ "To", "sip.To",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: To Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_UNSUPPORTED],
|
|
{ "Unsupported", "sip.Unsupported",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Unsupported Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_USER_AGENT],
|
|
{ "User-Agent", "sip.User-Agent",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: User-Agent Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_VIA],
|
|
{ "Via", "sip.Via",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Via Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_WARNING],
|
|
{ "Warning", "sip.Warning",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: Warning Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_WWW_AUTHENTICATE],
|
|
{ "WWW-Authenticate", "sip.WWW-Authenticate",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"RFC 3261: WWW-Authenticate Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_P_ACCESS_NETWORK_INFO],
|
|
{ "P-Access-Network-Info", "sip.P-Access-Network-Info",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Access-Network-Info Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_ASSERTED_IDENTITY],
|
|
{ "P-Asserted-Identity", "sip.P-Asserted-Identity",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Asserted-Identity Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_ASSOCIATED_URI],
|
|
{ "P-Associated-URI", "sip.P-Associated-URI",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Associated-URI Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_CALLED_PARTY_ID],
|
|
{ "P-Called-Party-ID", "sip.P-Called-Party-ID",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Called-Party-ID Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_CHARGING_FUNCTION_ADDRESSES],
|
|
{ "P-Charging-Function-Addresses","sip.P-Charging-Function-Addresses",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Charging-Function-Addresses", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_CHARGING_VECTOR],
|
|
{ "P-Charging-Vector", "sip.P-Charging-Vector",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Charging-Vector Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_DCS_TRACE_PARTY_ID],
|
|
{ "P-DCS-Trace-Party-ID", "sip.P-DCS-Trace-Party-ID",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-DCS-Trace-Party-ID Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_DCS_OSPS],
|
|
{ "P-DCS-OSPS", "sip.P-DCS-OSPS",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-DCS-OSPS Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_DCS_BILLING_INFO],
|
|
{ "P-DCS-Billing-Info", "sip.P-DCS-Billing-Info",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-DCS-Billing-Info Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_DCS_LAES],
|
|
{ "P-DCS-LAES", "sip.P-DCS-LAES",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-DCS-LAES Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_DCS_REDIRECT],
|
|
{ "P-DCS-Redirect", "sip.P-DCS-Redirect",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-DCS-Redirect Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_MEDIA_AUTHORIZATION],
|
|
{ "P-Media-Authorization", "sip.P-Media-Authorization",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Media-Authorization Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_PREFERRED_IDENTITY],
|
|
{ "P-Preferred-Identity", "sip.P-Preferred-Identity",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Preferred-Identity Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_P_VISITED_NETWORK_ID],
|
|
{ "P-Visited-Network-ID", "sip.P-Visited-Network-ID",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"P-Visited-Network-ID Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_PATH],
|
|
{ "Path", "sip.Path",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"Path Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_PRIVACY],
|
|
{ "Privacy", "sip.Privacy",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"Privacy Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_REASON],
|
|
{ "Reason", "sip.Reason",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"Reason Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_REFER_TO],
|
|
{ "Refer-To", "sip.Refer-To",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"Refer-To Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_SERVICE_ROUTE],
|
|
{ "Service-Route", "sip.Service-Route",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"Service-Route Header", HFILL }
|
|
},
|
|
|
|
{ &hf_header_array[POS_ETAG],
|
|
{ "ETag", "sip.ETag",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"ETag Header", HFILL }
|
|
},
|
|
{ &hf_header_array[POS_IF_MATCH],
|
|
{ "If_Match", "sip.If_Match",
|
|
FT_STRING, BASE_NONE,NULL,0x0,
|
|
"If-Match Header", HFILL }
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_sip,
|
|
&ett_sip_reqresp,
|
|
&ett_sip_hdr,
|
|
&ett_sip_element,
|
|
&ett_sip_message_body,
|
|
};
|
|
static gint *ett_raw[] = {
|
|
&ett_raw_text,
|
|
};
|
|
|
|
module_t *sip_module;
|
|
|
|
/* Register the protocol name and description */
|
|
proto_sip = proto_register_protocol("Session Initiation Protocol",
|
|
"SIP", "sip");
|
|
proto_raw_sip = proto_register_protocol("Session Initiation Protocol (SIP as raw text)",
|
|
"Raw_SIP", "raw_sip");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_sip, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
proto_register_subtree_array(ett_raw, array_length(ett_raw));
|
|
|
|
/* SIP content type and internet media type used by other dissectors are the same */
|
|
|
|
media_type_dissector_table = find_dissector_table("media_type");
|
|
|
|
|
|
sip_module = prefs_register_protocol(proto_sip, NULL);
|
|
|
|
prefs_register_bool_preference(sip_module, "display_raw_text",
|
|
"Display raw text for SIP message",
|
|
"Specifies that the raw text of the "
|
|
"SIP message should be displayed "
|
|
"in addition to the dissection tree",
|
|
&global_sip_raw_text);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_sip(void)
|
|
{
|
|
dissector_handle_t sip_handle, sip_tcp_handle;
|
|
|
|
sip_handle = new_create_dissector_handle(dissect_sip, proto_sip);
|
|
dissector_add("udp.port", UDP_PORT_SIP, sip_handle);
|
|
|
|
sip_tcp_handle = create_dissector_handle(dissect_sip_tcp, proto_sip);
|
|
dissector_add("tcp.port", TCP_PORT_SIP, sip_tcp_handle);
|
|
|
|
heur_dissector_add("udp", dissect_sip_heur, proto_sip);
|
|
heur_dissector_add("tcp", dissect_sip_heur, proto_sip);
|
|
heur_dissector_add("sctp", dissect_sip_heur, proto_sip);
|
|
|
|
}
|