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/* packet-sip.c
* Routines for the Session Initiation Protocol (SIP) dissection.
* RFCs 3261-3264
*
* TODO: Pay attention to Content-Type: It might not always be SDP.
* Content-Type is fixed, mixed/mode is not handled though.
* hf_ display filters for headers of SIP extension RFCs:
* Done for RFC 3265, RFC 3262
* Use hash table for list of headers
* Add sip msg body dissection based on Content-Type for:
* SDP, MIME, and other types
* Align SIP methods with recent Internet Drafts or RFC
* (SIP INFO, rfc2976 - done)
* (SIP SUBSCRIBE-NOTIFY - done)
* (SIP REFER - done)
* check for other
*
* Copyright 2000, Heikki Vatiainen <hessu@cs.tut.fi>
* Copyright 2001, Jean-Francois Mule <jfm@cablelabs.com>
*
* $Id: packet-sip.c,v 1.60 2004/02/18 20:55:57 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* Copied from packet-cops.c
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "prefs.h"
#include <glib.h>
#include <epan/packet.h>
#define TCP_PORT_SIP 5060
#define UDP_PORT_SIP 5060
/* Initialize the protocol and registered fields */
static gint proto_sip = -1;
static gint proto_raw_sip = -1;
static gint hf_msg_hdr = -1;
static gint hf_Method = -1;
static gint hf_Request_Line = -1;
static gint hf_Status_Code = -1;
static gint hf_Status_Line = -1;
static gint hf_sip_to_addr = -1;
static gint hf_sip_from_addr = -1;
static gint hf_sip_tag = -1;
/* Initialize the subtree pointers */
static gint ett_sip = -1;
static gint ett_sip_reqresp = -1;
static gint ett_sip_hdr = -1;
static gint ett_raw_text = -1;
static gint ett_sip_element = -1;
static gint ett_sip_message_body = -1;
/* PUBLISH method added as per http://www.ietf.org/internet-drafts/draft-ietf-sip-publish-01.txt */
static const char *sip_methods[] = {
"<Invalid method>", /* Pad so that the real methods start at index 1 */
"ACK",
"BYE",
"CANCEL",
"DO",
"INFO",
"INVITE",
"MESSAGE",
"NOTIFY",
"OPTIONS",
"PRACK",
"QAUTH",
"REFER",
"REGISTER",
"SPRACK",
"SUBSCRIBE",
"UPDATE",
"PUBLISH"
};
/* from RFC 3261 */
/* Updated with info from http://www.iana.org/assignments/sip-parameters */
/* (last updated 2003-10-31) */
/* Added two headsers ( Etag and If-Match )from http://www.ietf.org/internet-drafts/draft-ietf-sip-publish-01.txt */
typedef struct {
char *name;
char *compact_name;
} sip_header_t;
static const sip_header_t sip_headers[] = {
{ "Unknown-header", NULL }, /* Pad so that the real headers start at index 1 */
{ "Accept", NULL },
{ "Accept-Encoding", NULL },
{ "Accept-Language", NULL },
{ "Alert-Info", NULL },
{ "Allow", NULL },
{ "Allow-Events", NULL },
{ "Authentication-Info", NULL },
{ "Authorization", NULL },
{ "Call-ID", "i" },
{ "Call-Info", NULL },
{ "Contact", "m" },
{ "Content-Disposition", NULL },
{ "Content-Encoding", "e" },
{ "Content-Language", NULL },
{ "Content-Length", "l" },
{ "Content-Type", "c" },
{ "CSeq", NULL },
{ "Date", NULL },
{ "Error-Info", NULL },
{ "Event", "o" },
{ "Expires", NULL },
{ "From", "f" },
{ "In-Reply-To", NULL },
{ "Max-Forwards", NULL },
{ "MIME-Version", NULL },
{ "Min-Expires", NULL },
{ "Organization", NULL },
{ "Priority", NULL },
{ "Proxy-Authenticate", NULL },
{ "Proxy-Authorization", NULL },
{ "Proxy-Require", NULL },
{ "RAck", NULL },
{ "RSeq", NULL },
{ "Record-Route", NULL },
{ "Reply-To", NULL },
{ "Require", NULL },
{ "Retry-After", NULL },
{ "Route", NULL },
{ "Server", NULL },
{ "Subject", "s" },
{ "Subscription-State", NULL },
{ "Supported", "k" },
{ "Timestamp", NULL },
{ "To", "t" },
{ "Unsupported", NULL },
{ "User-Agent", NULL },
{ "Via", "v" },
{ "Warning", NULL },
{ "WWW-Authenticate", NULL },
{ "P-Access-Network-Info", NULL }, /* RFC3455 */
{ "P-Asserted-Identity", NULL }, /* RFC3325 */
{ "P-Associated-URI", NULL }, /* RFC3455 */
{ "P-Called-Party-ID", NULL }, /* RFC3455 */
{ "P-Charging-Function-Addresses",NULL }, /* RFC3455 */
{ "P-Charging-Vector", NULL }, /* RFC3455 */
{ "P-DCS-Trace-Party-ID", NULL }, /* RFC3603 */
{ "P-DCS-OSPS", NULL }, /* RFC3603 */
{ "P-DCS-Billing-Info", NULL }, /* RFC3603 */
{ "P-DCS-LAES", NULL }, /* RFC3603 */
{ "P-DCS-Redirect", NULL }, /* RFC3603 */
{ "P-Media-Authorization", NULL }, /* RFC3313 */
{ "P-Preferred-Identity", NULL }, /* RFC3325 */
{ "P-Visited-Network-ID", NULL }, /* RFC3455 */
{ "Path", NULL }, /* RFC3327 */
{ "Privacy", NULL }, /* RFC3323 */
{ "Reason", NULL }, /* RFC3326 */
{ "Refer-To", "r" }, /* RFC3515 */
{ "Service-Route", NULL }, /* RFC3608 */
{ "ETag", NULL }, /* draft-ietf-sip-publish-01 */
{ "If-Match", NULL }, /* draft-ietf-sip-publish-01 */
};
#define POS_ACCEPT 1
#define POS_ACCEPT_ENCODING 2
#define POS_ACCEPT_LANGUAGE 3
#define POS_ALERT_INFO 4
#define POS_ALLOW 5
#define POS_ALLOW_EVENTS 6
#define POS_AUTHENTICATION_INFO 7
#define POS_AUTHORIZATION 8
#define POS_CALL_ID 9
#define POS_CALL_INFO 10
#define POS_CONTACT 11
#define POS_CONTENT_DISPOSITION 12
#define POS_CONTENT_ENCODING 13
#define POS_CONTENT_LANGUAGE 14
#define POS_CONTENT_LENGTH 15
#define POS_CONTENT_TYPE 16
#define POS_CSEQ 17
#define POS_DATE 18
#define POS_ERROR_INFO 19
#define POS_EVENT 20
#define POS_EXPIRES 21
#define POS_FROM 22
#define POS_IN_REPLY_TO 23
#define POS_MAX_FORWARDS 24
#define POS_MIME_VERSION 25
#define POS_MIN_EXPIRES 26
#define POS_ORGANIZATION 27
#define POS_PRIORITY 28
#define POS_PROXY_AUTHENTICATE 29
#define POS_PROXY_AUTHORIZATION 30
#define POS_PROXY_REQUIRE 31
#define POS_RACK 32
#define POS_RSEQ 33
#define POS_RECORD_ROUTE 34
#define POS_REPLY_TO 35
#define POS_REQUIRE 36
#define POS_RETRY_AFTER 37
#define POS_ROUTE 38
#define POS_SERVER 39
#define POS_SUBJECT 40
#define POS_SUBSCRIPTION_STATE 41
#define POS_SUPPORTED 42
#define POS_TIMESTAMP 43
#define POS_TO 44
#define POS_UNSUPPORTED 45
#define POS_USER_AGENT 46
#define POS_VIA 47
#define POS_WARNING 48
#define POS_WWW_AUTHENTICATE 49
#define POS_P_ACCESS_NETWORK_INFO 50
#define POS_P_ASSERTED_IDENTITY 51
#define POS_P_ASSOCIATED_URI 52
#define POS_P_CALLED_PARTY_ID 53
#define POS_P_CHARGING_FUNCTION_ADDRESSES 54
#define POS_P_CHARGING_VECTOR 55
#define POS_P_DCS_TRACE_PARTY_ID 56
#define POS_P_DCS_OSPS 57
#define POS_P_DCS_BILLING_INFO 58
#define POS_P_DCS_LAES 59
#define POS_P_DCS_REDIRECT 60
#define POS_P_MEDIA_AUTHORIZATION 61
#define POS_P_PREFERRED_IDENTITY 62
#define POS_P_VISITED_NETWORK_ID 63
#define POS_PATH 64
#define POS_PRIVACY 65
#define POS_REASON 66
#define POS_REFER_TO 67
#define POS_SERVICE_ROUTE 68
#define POS_ETAG 69
#define POS_IF_MATCH 70
static gint hf_header_array[] = {
-1, /* "Unknown-header" - Pad so that the real headers start at index 1 */
-1, /* "Accept" */
-1, /* "Accept-Encoding" */
-1, /* "Accept-Language" */
-1, /* "Alert-Info" */
-1, /* "Allow" */
-1, /* "Allow-Events" - RFC 3265 */
-1, /* "Authentication-Info" */
-1, /* "Authorization" */
-1, /* "Call-ID" */
-1, /* "Call-Info" */
-1, /* "Contact" */
-1, /* "Content-Disposition" */
-1, /* "Content-Encoding" */
-1, /* "Content-Language" */
-1, /* "Content-Length" */
-1, /* "Content-Type" */
-1, /* "CSeq" */
-1, /* "Date" */
-1, /* "Error-Info" */
-1, /* "Expires" */
-1, /* "Event" - RFC 3265 */
-1, /* "From" */
-1, /* "In-Reply-To" */
-1, /* "Max-Forwards" */
-1, /* "MIME-Version" */
-1, /* "Min-Expires" */
-1, /* "Organization" */
-1, /* "Priority" */
-1, /* "Proxy-Authenticate" */
-1, /* "Proxy-Authorization" */
-1, /* "Proxy-Require" */
-1, /* "RAck" - RFC 3262 */
-1, /* "RSeq" - RFC 3261 */
-1, /* "Record-Route" */
-1, /* "Reply-To" */
-1, /* "Require" */
-1, /* "Retry-After" */
-1, /* "Route" */
-1, /* "Server" */
-1, /* "Subject" */
-1, /* "Subscription-State" - RFC 3265 */
-1, /* "Supported" */
-1, /* "Timestamp" */
-1, /* "To" */
-1, /* "Unsupported" */
-1, /* "User-Agent" */
-1, /* "Via" */
-1, /* "Warning" */
-1, /* "WWW-Authenticate" */
-1, /* "P-Access-Network-Info" - RFC3455 */
-1, /* "P-Asserted-Identity" - RFC3325 */
-1, /* "P-Associated-URI" - RFC3455 */
-1, /* "P-Called-Party-ID" - RFC3455 */
-1, /* "P-Charging-Function-Addresses" - RFC3455 */
-1, /* "P-Charging-Vector" - RFC3455 */
-1, /* "P-DCS-Trace-Party-ID" - RFC3603 */
-1, /* "P-DCS-OSPS" - RFC3603 */
-1, /* "P-DCS-Billing-Info" - RFC3603 */
-1, /* "P-DCS-LAES" - RFC3603 */
-1, /* "P-DCS-Redirect" - RFC3603 */
-1, /* "P-Media-Authorization" - RFC3313 */
-1, /* "P-Preferred-Identity" - RFC3325 */
-1, /* "P-Visited-Network-ID" - RFC3455 */
-1, /* "Path" - RFC3327 */
-1, /* "Privacy" - RFC3323 */
-1, /* "Reason" - RFC3326 */
-1, /* "Refer-To" - RFC3515 */
-1, /* "Service-Route" - RFC3608 */
-1, /* "ETag" draft-ietf-sip-publish-01 */
-1, /* "If-Match draft-ietf-sip-publish-01 */
};
/*
* Type of line. It's either a SIP Request-Line, a SIP Status-Line, or
* another type of line.
*/
typedef enum {
REQUEST_LINE,
STATUS_LINE,
OTHER_LINE
} line_type_t;
/* global_sip_raw_text determines whether we are going to display */
/* the raw text of the SIP message, much like the MEGACO dissector does. */
static gboolean global_sip_raw_text = FALSE;
/* strict_sip_version determines whether the SIP dissector enforces
* the SIP version to be "SIP/2.0". */
static gboolean strict_sip_version = TRUE;
static gboolean dissect_sip_common(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *tree, gboolean is_heur);
static line_type_t sip_parse_line(tvbuff_t *tvb, gint linelen,
guint *token_1_len);
static gboolean sip_is_known_request(tvbuff_t *tvb, int meth_offset,
guint meth_len, guint *meth_idx);
static gint sip_is_known_sip_header(tvbuff_t *tvb, int offset,
guint header_len);
static void dfilter_sip_request_line(tvbuff_t *tvb, proto_tree *tree,
guint meth_len);
static void dfilter_sip_status_line(tvbuff_t *tvb, proto_tree *tree);
static void tvb_raw_text_add(tvbuff_t *tvb, proto_tree *tree);
/* SIP content type and internet media type used by other dissectors
* are the same. List of media types from IANA at:
* http://www.iana.org/assignments/media-types/index.html */
static dissector_table_t media_type_dissector_table;
#define SIP2_HDR "SIP/2.0"
#define SIP2_HDR_LEN (strlen (SIP2_HDR))
/* Code to actually dissect the packets */
static int
dissect_sip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
if (!dissect_sip_common(tvb, pinfo, tree, FALSE))
return 0;
return tvb_length(tvb);
}
static void
dissect_sip_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
dissect_sip_common(tvb, pinfo, tree, TRUE);
}
static gboolean
dissect_sip_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return dissect_sip_common(tvb, pinfo, tree, FALSE);
}
static gboolean
dissect_sip_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
gboolean dissect_other_as_continuation)
{
int offset;
gint next_offset, linelen;
line_type_t line_type;
tvbuff_t *next_tvb;
gboolean is_known_request;
gboolean found_match = FALSE;
char *descr;
guint token_1_len;
guint current_method_idx = 0;
proto_item *ts = NULL, *ti, *th = NULL, *sip_element_item;
proto_tree *sip_tree = NULL, *reqresp_tree, *hdr_tree = NULL, *sip_element_tree, *message_body_tree;
guchar contacts = 0, contact_is_star = 0, expires_is_0 = 0;
char csec_method[16] = "";
char *media_type_str = NULL;
char *media_type_str_lower_case = NULL;
char *content_type_parameter_str = NULL;
/*
* 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()" calls below won't throw exceptions.
*
* Note that "tvb_strneql()" doesn't throw exceptions, so
* "sip_parse_line()" won't throw an exception.
*/
offset = 0;
linelen = tvb_find_line_end(tvb, 0, -1, &next_offset, FALSE);
line_type = sip_parse_line(tvb, linelen, &token_1_len);
if (line_type == OTHER_LINE) {
/*
* This is neither a SIP request nor response.
*/
if (!dissect_other_as_continuation) {
/*
* We were asked to reject this.
*/
return FALSE;
}
/*
* Just dissect it as a continuation.
*/
}
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SIP");
switch (line_type) {
case REQUEST_LINE:
is_known_request = sip_is_known_request(tvb, 0, token_1_len, &current_method_idx);
descr = is_known_request ? "Request" : "Unknown request";
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %s",
descr,
tvb_format_text(tvb, 0, linelen - SIP2_HDR_LEN - 1));
}
break;
case STATUS_LINE:
descr = "Status";
if (check_col(pinfo->cinfo, COL_INFO)) {
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((guchar)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 = line_end_offset - (semicolon_offset + 1);
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);
#if GLIB_MAJOR_VERSION < 2
media_type_str_lower_case = g_strdup(media_type_str);
g_strdown(media_type_str_lower_case);
#else
media_type_str_lower_case = g_ascii_strdown(media_type_str, -1);
#endif
g_free(media_type_str);
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 header item.
*/
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_lower_case != NULL ) {
void *save_private_data = pinfo->private_data;
pinfo->private_data = content_type_parameter_str;
found_match = dissector_try_string(media_type_dissector_table,
media_type_str_lower_case,
next_tvb, pinfo,
message_body_tree);
g_free(media_type_str_lower_case);
g_free(content_type_parameter_str);
pinfo->private_data = save_private_data;
/* 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
*
* From section 7.1 of RFC 3261:
*
* Unlike HTTP, SIP treats the version number as a literal string.
* In practice, this should make no difference.
*/
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 ( (strict_sip_version && (
token_1_len == SIP2_HDR_LEN
&& tvb_strneql(tvb, 0, SIP2_HDR, SIP2_HDR_LEN) == 0)
) || (! strict_sip_version && (
tvb_strneql(tvb, 0, "SIP/", 4) == 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 ( (strict_sip_version && (
token_3_len != SIP2_HDR_LEN
|| tvb_strneql(tvb, token_3_start, SIP2_HDR, SIP2_HDR_LEN) == -1)
) || (! strict_sip_version && (
tvb_strneql(tvb, token_3_start, "SIP/", 4) == -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);
prefs_register_bool_preference(sip_module, "strict_sip_version",
"Enforce strict SIP version check (" SIP2_HDR ")",
"If enabled, only " SIP2_HDR " traffic will be dissected as SIP. "
"Disable it to allow SIP traffic with a different version "
"to be dissected as SIP.",
&strict_sip_version);
}
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);
dissector_add_string("media_type", "message/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);
}
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