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wireshark/epan/dissectors/packet-msrp.c
Michael Mann 9b7fb8a811 Create the ability to have packet scoped "proto" data. Bug 9470 (https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=9470) 
I'm not sold on the name or module the proto_data functions live in, but I believe the function arguments are solid and gives us the most flexibility for the future.  And search/replace of a function name is easy enough to do.

The big driving force for getting this in sooner rather than later is the saved memory on ethernet packets (and IP packets soon), that used to have file_scope() proto data when all it needed was packet_scope() data (technically packet_info->pool scoped), strictly for Decode As.

All dissectors that use p_add_proto_data() only for Decode As functionality have been converted to using packet_scope().  All other dissectors were converted to using file_scope() which was the original scope for "proto" data.

svn path=/trunk/; revision=53520
2013-11-23 02:20:13 +00:00

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/* packet-msrp.c
* Routines for Message Session Relay Protocol(MSRP) dissection
* Copyright 2005, Anders Broman <anders.broman[at]ericsson.com>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* References:
* https://tools.ietf.org/html/rfc4975
*/
#include "config.h"
#include <stdlib.h>
#include <ctype.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/conversation.h>
#include <epan/strutil.h>
#include <epan/wmem/wmem.h>
#include <epan/prefs.h>
#include <wsutil/str_util.h>
#include "packet-msrp.h"
#define TCP_PORT_MSRP 0
#define MSRP_HDR "MSRP"
#define MSRP_HDR_LEN (strlen (MSRP_HDR))
/* Initialize the protocol and registered fields */
static int proto_msrp = -1;
/* Initialize the subtree pointers */
static int ett_msrp = -1;
static int ett_raw_text = -1;
static int ett_msrp_reqresp = -1;
static int ett_msrp_hdr = -1;
static int ett_msrp_data = -1;
static int ett_msrp_end_line = -1;
static int ett_msrp_setup = -1;
static int hf_msrp_response_line = -1;
static int hf_msrp_request_line = -1;
static int hf_msrp_transactionID = -1;
static int hf_msrp_method = -1;
static int hf_msrp_status_code = -1;
static int hf_msrp_msg_hdr = -1;
static int hf_msrp_end_line = -1;
static int hf_msrp_cnt_flg = -1;
static int hf_msrp_data = -1;
/* MSRP setup fields */
static int hf_msrp_setup = -1;
static int hf_msrp_setup_frame = -1;
static int hf_msrp_setup_method = -1;
typedef struct {
const char *name;
} msrp_header_t;
static const msrp_header_t msrp_headers[] = {
{ "Unknown-header"},
{ "From-Path"}, /* 1 */
{ "To-Path"}, /* 2 */
{ "Message-ID"}, /* 3 */
{ "Success-Report"}, /* 4 */
{ "Failure-Report"}, /* 5 */
{ "Byte-Range"}, /* 6 */
{ "Status"}, /* 7 */
{ "Content-Type"}, /* 8 */
{ "Content-ID"}, /* 9 */
{ "Content-Description"}, /* 10 */
{ "Content-Disposition"}, /* 11 */
{ "Use-Path"}, /* 12 */
{ "WWW-Authenticate"}, /* 13 */
{ "Authorization"}, /* 14 */
{ "Authentication-Info"}, /* 15 */
};
static gint hf_header_array[] = {
-1, /* 0"Unknown-header" - Pad so that the real headers start at index 1 */
-1, /* 1"From-Path */
-1, /* 2"To-Path */
-1, /* 3"Message-ID" */
-1, /* 4"Success-Report" */
-1, /* 5"Failure-Report" */
-1, /* 6"Byte-Range" */
-1, /* 7"Status" */
-1, /* 8"Content-Type" */
-1, /* 9"Content-ID" */
-1, /* 10"Content-Description" */
-1, /* 11"Content-Disposition" */
-1, /* 12"Use-Path" */
-1, /* 13"WWW-Authenticate" */
-1, /* 14"Authorization" */
-1, /* 15"Authentication-Info" */
};
#define MSRP_FROM_PATH 1
#define MSRP_TO_PATH 2
#define MSRP_MESSAGE_ID 3
#define MSRP_SUCCESS_REPORT 4
#define MSRP_FAILURE_REPORT 5
#define MSRP_BYTE_RANGE 6
#define MSRP_STATUS 7
#define MSRP_CONTENT_TYPE 8
#define MSRP_CONTENT_ID 9
#define MSRP_CONTENT_DISCRIPTION 10
#define MSRP_CONTENT_DISPOSITION 11
#define MSRP_USE_PATH 12
#define MSRP_WWW_AUTHENTICATE 13
#define MSRP_AUTHORIZATION 14
#define MSRP_AUTHENTICATION_INFO 15
static dissector_handle_t msrp_handle;
static gboolean global_msrp_raw_text = TRUE;
/* MSRP 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;
static int dissect_msrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data);
/* Displaying conversation setup info */
static gboolean global_msrp_show_setup_info = TRUE;
static void show_setup_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
/* Set up an MSRP conversation using the info given */
void
msrp_add_address( packet_info *pinfo,
address *addr, int port,
const gchar *setup_method, guint32 setup_frame_number)
{
address null_addr;
conversation_t* p_conv;
struct _msrp_conversation_info *p_conv_data = NULL;
/*
* If this isn't the first time this packet has been processed,
* we've already done this work, so we don't need to do it
* again.
*/
if (pinfo->fd->flags.visited)
{
return;
}
SET_ADDRESS(&null_addr, AT_NONE, 0, NULL);
/*
* Check if the ip address and port combination is not
* already registered as a conversation.
*/
p_conv = find_conversation( pinfo->fd->num, addr, &null_addr, PT_TCP, port, 0,
NO_ADDR_B | NO_PORT_B);
/*
* If not, create a new conversation.
*/
if (!p_conv) {
p_conv = conversation_new( pinfo->fd->num, addr, &null_addr, PT_TCP,
(guint32)port, 0,
NO_ADDR2 | NO_PORT2);
}
/* Set dissector */
conversation_set_dissector(p_conv, msrp_handle);
/*
* Check if the conversation has data associated with it.
*/
p_conv_data = (struct _msrp_conversation_info *)conversation_get_proto_data(p_conv, proto_msrp);
/*
* If not, add a new data item.
*/
if (!p_conv_data) {
/* Create conversation data */
p_conv_data = wmem_new0(wmem_file_scope(), struct _msrp_conversation_info);
conversation_add_proto_data(p_conv, proto_msrp, p_conv_data);
}
/*
* Update the conversation data.
*/
p_conv_data->setup_method_set = TRUE;
g_strlcpy(p_conv_data->setup_method, setup_method, MAX_MSRP_SETUP_METHOD_SIZE);
p_conv_data->setup_frame_number = setup_frame_number;
}
/* Look for conversation info and display any setup info found */
static void
show_setup_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Conversation and current data */
conversation_t *p_conv = NULL;
struct _msrp_conversation_info *p_conv_data = NULL;
/* Use existing packet data if available */
p_conv_data = (struct _msrp_conversation_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_msrp, 0);
if (!p_conv_data)
{
/* First time, get info from conversation */
p_conv = find_conversation(pinfo->fd->num, &pinfo->net_dst, &pinfo->net_src,
PT_TCP,
pinfo->destport, pinfo->srcport, 0);
if (p_conv)
{
/* Look for data in conversation */
struct _msrp_conversation_info *p_conv_packet_data;
p_conv_data = (struct _msrp_conversation_info *)conversation_get_proto_data(p_conv, proto_msrp);
if (p_conv_data)
{
/* Save this conversation info into packet info */
p_conv_packet_data = (struct _msrp_conversation_info *)wmem_memdup(wmem_file_scope(),
p_conv_data, sizeof(struct _msrp_conversation_info));
p_add_proto_data(wmem_file_scope(), pinfo, proto_msrp, 0, p_conv_packet_data);
}
}
}
/* Create setup info subtree with summary info. */
if (p_conv_data && p_conv_data->setup_method_set)
{
proto_tree *msrp_setup_tree;
proto_item *ti = proto_tree_add_string_format(tree, hf_msrp_setup, tvb, 0, 0,
"",
"Stream setup by %s (frame %u)",
p_conv_data->setup_method,
p_conv_data->setup_frame_number);
PROTO_ITEM_SET_GENERATED(ti);
msrp_setup_tree = proto_item_add_subtree(ti, ett_msrp_setup);
if (msrp_setup_tree)
{
/* Add details into subtree */
proto_item* item = proto_tree_add_uint(msrp_setup_tree, hf_msrp_setup_frame,
tvb, 0, 0, p_conv_data->setup_frame_number);
PROTO_ITEM_SET_GENERATED(item);
item = proto_tree_add_string(msrp_setup_tree, hf_msrp_setup_method,
tvb, 0, 0, p_conv_data->setup_method);
PROTO_ITEM_SET_GENERATED(item);
}
}
}
/* Returns index of headers */
static gint msrp_is_known_msrp_header(tvbuff_t *tvb, int offset, guint header_len)
{
guint i;
for (i = 1; i < array_length(msrp_headers); i++) {
if (header_len == strlen(msrp_headers[i].name) &&
tvb_strncaseeql(tvb, offset, msrp_headers[i].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)
{
int offset, next_offset, linelen;
offset = 0;
while (tvb_offset_exists(tvb, offset)) {
/* 'desegment' is FALSE so will set next_offset to beyond the end of
the buffer if no line ending is found */
tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
linelen = next_offset - offset;
if(tree) {
proto_tree_add_text(tree, tvb, offset, linelen,
"%s", tvb_format_text(tvb, offset, linelen));
}
offset = next_offset;
}
}
/* This code is modeled on the code in packet-sip.c
* ABNF code for the MSRP header:
* The following syntax specification uses the augmented Backus-Naur
* Form (BNF) as described in RFC-2234 [6].
*
*
* msrp-req-or-resp = msrp-request / msrp-response
* msrp-request = req-start headers [content-stuff] end-line
* msrp-response = resp-start headers end-line
*
* req-start = pMSRP SP transact-id SP method CRLF
* resp-start = pMSRP SP transact-id SP status-code [SP phrase] CRLF
* phrase = utf8text
*
* pMSRP = %x4D.53.52.50 ; MSRP in caps
* transact-id = ident
* method = mSEND / mREPORT / other-method
* mSEND = %x53.45.4e.44 ; SEND in caps
* mREPORT = %x52.45.50.4f.52.54; REPORT in caps
* other-method = 1*UPALPHA
* Examples:
* "MSRP 1234 SEND(CRLF)"
* "MSRP 1234 200 OK(CRLF)
*/
static gboolean
check_msrp_header(tvbuff_t *tvb)
{
gint linelen;
gint space_offset;
gint next_offset = 0;
guint token_1_len;
gint token_2_start;
/*
* 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. *
*/
if(tvb_length(tvb) < 4 || tvb_get_ntohl(tvb, 0) != 0x4d535250 /* MSRP */){
return FALSE;
}
linelen = tvb_find_line_end(tvb, 0, -1, &next_offset, FALSE);
/* Find the first SP */
space_offset = tvb_find_guint8(tvb, 0, linelen, ' ');
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 response), or
* the first character in the line is a space ( which isn't valid
* for a MSRP header.)
*/
return FALSE;
}
token_1_len = space_offset;
token_2_start = space_offset + 1;
space_offset = tvb_find_guint8(tvb, token_2_start, linelen, ' ');
if (space_offset == -1) {
/*
* There's no space after the second token, so we don't
* have a third token.
*/
return FALSE;
}
/*
* Is the first token "MSRP"?
*/
if (token_1_len == MSRP_HDR_LEN) { /* && tvb_strneql(tvb, 0, MSRP_HDR, MSRP_HDR_LEN) == 0){ */
/* This check can be made more strict but accept we do have MSRP for now */
return TRUE;
}
return FALSE;
}
/* ABNF of line-end:
* end-line = "-------" transact-id continuation-flag CRLF
* This code is modeled on the code in packet-multipart.c
*/
static int
find_end_line(tvbuff_t *tvb, gint start)
{
gint offset = start, next_offset, linelen;
while (tvb_length_remaining(tvb, offset) > 0) {
/* 'desegment' is FALSE so will set next_offset to beyond the end of
the buffer if no line ending is found */
linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
if (linelen == -1) {
return -1;
}
if (tvb_strneql(tvb, next_offset, (const gchar *)"-------", 7) == 0)
return next_offset;
offset = next_offset;
}
return -1;
}
static gboolean
dissect_msrp_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
conversation_t* conversation;
if ( check_msrp_header(tvb)){
/*
* TODO Set up conversation here
*/
if (pinfo->fd->flags.visited){
/* Look for existing conversation */
conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, pinfo->ptype,
pinfo->srcport, pinfo->destport, 0);
/* Create new one if not found */
if (conversation == NULL){
conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst,
pinfo->ptype, pinfo->srcport, pinfo->destport, 0);
/* Set dissector */
conversation_set_dissector(conversation, msrp_handle);
}
}
dissect_msrp(tvb, pinfo, tree, NULL);
return TRUE;
}
return FALSE;
}
/* Code to actually dissect the packets */
static int
dissect_msrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
gint offset = 0;
gint next_offset = 0;
proto_item *ti, *th, *msrp_headers_item;
proto_tree *msrp_tree, *reqresp_tree, *raw_tree, *msrp_hdr_tree, *msrp_end_tree;
proto_tree *msrp_data_tree;
gint linelen;
gint space_offset;
gint token_2_start;
guint token_2_len;
gint token_3_start;
guint token_3_len;
gint token_4_start = 0;
guint token_4_len = 0;
gboolean is_msrp_response;
gint end_line_offset;
gint end_line_len;
gint line_end_offset;
gint message_end_offset;
gint colon_offset;
gint header_len;
gint hf_index;
gint value_offset;
guchar c;
gint value_len;
char *value;
gboolean have_body = FALSE;
gboolean found_match = FALSE;
gint content_type_len, content_type_parameter_str_len;
gchar *media_type_str_lower_case = NULL;
char *content_type_parameter_str = NULL;
tvbuff_t *next_tvb;
gint parameter_offset;
gint semi_colon_offset;
if ( !check_msrp_header(tvb)){
return 0;
}
/* We have a MSRP header with at least three tokens
*
* 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. *
*/
linelen = tvb_find_line_end(tvb, 0, -1, &next_offset, FALSE);
/* Find the first SP and skip the first token */
token_2_start = tvb_find_guint8(tvb, 0, linelen, ' ') + 1;
/* Work out 2nd token's length by finding next space */
space_offset = tvb_find_guint8(tvb, token_2_start, linelen-token_2_start, ' ');
token_2_len = space_offset - token_2_start;
/* Look for another space in this line to indicate a 4th token */
token_3_start = space_offset + 1;
space_offset = tvb_find_guint8(tvb, token_3_start,linelen-token_3_start, ' ');
if ( space_offset == -1){
/* 3rd token runs to the end of the line */
token_3_len = linelen - token_3_start;
}else{
/* We have a fourth token */
token_3_len = space_offset - token_3_start;
token_4_start = space_offset + 1;
token_4_len = linelen - token_4_start;
}
/*
* Yes, so this is either a msrp-request or msrp-response.
* To be a msrp-response, the second token must be
* a 3-digit number.
*/
is_msrp_response = FALSE;
if (token_3_len == 3) {
if (isdigit(tvb_get_guint8(tvb, token_3_start)) &&
isdigit(tvb_get_guint8(tvb, token_3_start + 1)) &&
isdigit(tvb_get_guint8(tvb, token_3_start + 2))) {
is_msrp_response = TRUE;
}
}
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "MSRP");
if (is_msrp_response){
col_add_fstr(pinfo->cinfo, COL_INFO, "Response: %s ",
tvb_format_text(tvb, token_3_start, token_3_len));
if (token_4_len )
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
tvb_format_text(tvb, token_4_start, token_4_len));
col_append_fstr(pinfo->cinfo, COL_INFO, "Transaction ID: %s",
tvb_format_text(tvb, token_2_start, token_2_len));
}else{
proto_tree_add_text(tree, tvb, token_3_start, token_3_len,
"Col %s L=%u", tvb_format_text(tvb, token_3_start, token_3_len),token_3_len);
col_add_fstr(pinfo->cinfo, COL_INFO, "Request: %s ",
tvb_format_text(tvb, token_3_start, token_3_len));
col_append_fstr(pinfo->cinfo, COL_INFO, "Transaction ID: %s",
tvb_format_text(tvb, token_2_start, token_2_len));
}
/* Find the end line to be able to process the headers
* Note that in case of [content-stuff] headers and [content-stuff] is separated by CRLF
*/
offset = next_offset;
end_line_offset = find_end_line(tvb,offset);
/* TODO if -1 (No end line found, is returned do something) */
end_line_len = tvb_find_line_end(tvb, end_line_offset, -1, &next_offset, FALSE);
message_end_offset = end_line_offset + end_line_len + 2;
if (tree) {
ti = proto_tree_add_item(tree, proto_msrp, tvb, 0, message_end_offset, ENC_NA);
msrp_tree = proto_item_add_subtree(ti, ett_msrp);
if (is_msrp_response){
th = proto_tree_add_item(msrp_tree,hf_msrp_response_line,tvb,0,linelen,ENC_ASCII|ENC_NA);
reqresp_tree = proto_item_add_subtree(th, ett_msrp_reqresp);
proto_tree_add_item(reqresp_tree,hf_msrp_transactionID,tvb,token_2_start,token_2_len,ENC_ASCII|ENC_NA);
proto_tree_add_uint(reqresp_tree,hf_msrp_status_code,tvb,token_3_start,token_3_len,
atoi(tvb_get_string(wmem_packet_scope(), tvb, token_3_start, token_3_len)));
}else{
th = proto_tree_add_item(msrp_tree,hf_msrp_request_line,tvb,0,linelen,ENC_ASCII|ENC_NA);
reqresp_tree = proto_item_add_subtree(th, ett_msrp_reqresp);
proto_tree_add_item(reqresp_tree,hf_msrp_transactionID,tvb,token_2_start,token_2_len,ENC_ASCII|ENC_NA);
proto_tree_add_item(reqresp_tree,hf_msrp_method,tvb,token_3_start,token_3_len,ENC_ASCII|ENC_NA);
}
/* Conversation setup info */
if (global_msrp_show_setup_info)
{
show_setup_info(tvb, pinfo, msrp_tree);
}
/* Headers */
msrp_headers_item = proto_tree_add_item(msrp_tree, hf_msrp_msg_hdr, tvb, offset,(end_line_offset - offset), ENC_NA);
msrp_hdr_tree = proto_item_add_subtree(msrp_headers_item, ett_msrp_hdr);
/*
* Process the headers
*/
while (tvb_reported_length_remaining(tvb, offset) > 0 && offset < end_line_offset ) {
/* 'desegment' is FALSE so will set next_offset to beyond the end of
the buffer if no line ending is found */
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.
*/
have_body = TRUE;
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(msrp_hdr_tree, tvb, offset,
next_offset - offset, "%s",
tvb_format_text(tvb, offset, linelen));
} else {
header_len = colon_offset - offset;
hf_index = msrp_is_known_msrp_header(tvb, offset, header_len);
if (hf_index == -1) {
proto_tree_add_text(msrp_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(wmem_packet_scope(), tvb, value_offset,
value_len);
/*
* Add it to the protocol tree,
* but display the line as is.
*/
proto_tree_add_string_format(msrp_hdr_tree,
hf_header_array[hf_index], tvb,
offset, next_offset - offset,
value, "%s",
tvb_format_text(tvb, offset, linelen));
switch ( hf_index ) {
case MSRP_CONTENT_TYPE :
content_type_len = value_len;
semi_colon_offset = tvb_find_guint8(tvb, value_offset,linelen, ';');
if ( semi_colon_offset != -1) {
parameter_offset = semi_colon_offset +1;
/*
* Skip whitespace after the semicolon.
*/
while (parameter_offset < line_end_offset
&& ((c = tvb_get_guint8(tvb, parameter_offset)) == ' '
|| c == '\t'))
parameter_offset++;
content_type_len = semi_colon_offset - value_offset;
content_type_parameter_str_len = line_end_offset - parameter_offset;
content_type_parameter_str = tvb_get_string(wmem_packet_scope(), tvb,
parameter_offset, content_type_parameter_str_len);
}
media_type_str_lower_case = ascii_strdown_inplace(
(gchar *)tvb_get_string(wmem_packet_scope(), tvb, value_offset, content_type_len));
break;
default:
break;
}
}
}
offset = next_offset;
}/* End while */
if ( have_body ){
/*
* There's a message body starting at "next_offset".
* Set the length of the header item.
*/
proto_item_set_end(msrp_headers_item, tvb, next_offset);
/* Create new tree & tvb for data */
next_tvb = tvb_new_subset_remaining(tvb, next_offset);
ti = proto_tree_add_item(msrp_tree, hf_msrp_data, tvb,
next_offset, -1, ENC_ASCII|ENC_NA);
msrp_data_tree = proto_item_add_subtree(ti, ett_msrp_data);
/* 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,
msrp_data_tree, NULL);
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(msrp_data_tree, next_tvb, offset, linelen,
"%s", tvb_format_text(next_tvb, offset, linelen));
offset = next_offset;
}/* end while */
}
}
/* End line */
ti = proto_tree_add_item(msrp_tree,hf_msrp_end_line,tvb,end_line_offset,end_line_len,ENC_ASCII|ENC_NA);
msrp_end_tree = proto_item_add_subtree(ti, ett_msrp_end_line);
proto_tree_add_item(msrp_end_tree,hf_msrp_transactionID,tvb,end_line_offset + 7,token_2_len,ENC_ASCII|ENC_NA);
/* continuation-flag */
proto_tree_add_item(msrp_end_tree,hf_msrp_cnt_flg,tvb,end_line_offset+end_line_len-1,1,ENC_ASCII|ENC_NA);
if (global_msrp_raw_text){
ti = proto_tree_add_text(tree, tvb, 0, -1,"Message Session Relay Protocol(as raw text)");
raw_tree = proto_item_add_subtree(ti, ett_msrp);
tvb_raw_text_add(tvb,raw_tree);
}
}/* if tree */
return message_end_offset;
/* return tvb_length(tvb); */
/* If this protocol has a sub-dissector call it here, see section 1.8 */
}
void
proto_register_msrp(void)
{
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_msrp,
&ett_raw_text,
&ett_msrp_reqresp,
&ett_msrp_hdr,
&ett_msrp_data,
&ett_msrp_end_line,
&ett_msrp_setup
};
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_msrp_request_line,
{ "Request Line", "msrp.request.line",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_msrp_response_line,
{ "Response Line", "msrp.response.line",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_msrp_transactionID,
{ "Transaction Id", "msrp.transaction.id",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_msrp_method,
{ "Method", "msrp.method",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_msrp_status_code,
{ "Status code", "msrp.status.code",
FT_UINT16, BASE_DEC,NULL,0x0,
NULL, HFILL }
},
{ &hf_msrp_msg_hdr,
{ "Message Header", "msrp.msg.hdr",
FT_NONE, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_msrp_end_line,
{ "End Line", "msrp.end.line",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_msrp_cnt_flg,
{ "Continuation-flag", "msrp.cnt.flg",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_FROM_PATH],
{ "From Path", "msrp.from.path",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_TO_PATH],
{ "To Path", "msrp.to.path",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_MESSAGE_ID],
{ "Message ID", "msrp.messageid",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_SUCCESS_REPORT],
{ "Success Report", "msrp.success.report",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_FAILURE_REPORT],
{ "Failure Report", "msrp.failure.report",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_BYTE_RANGE],
{ "Byte Range", "msrp.byte.range",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_STATUS],
{ "Status", "msrp.status",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_CONTENT_TYPE],
{ "Content-Type", "msrp.content.type",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_CONTENT_ID],
{ "Content-ID", "msrp.content.id",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_CONTENT_DISCRIPTION],
{ "Content-Description", "msrp.content.description",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_CONTENT_DISPOSITION],
{ "Content-Disposition", "msrp.content.disposition",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_USE_PATH],
{ "Use-Path", "msrp.use.path",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_WWW_AUTHENTICATE],
{ "WWW-Authenticate", "msrp.www.authenticate",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_AUTHORIZATION],
{ "Authorization", "msrp.authorization",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_header_array[MSRP_AUTHENTICATION_INFO],
{ "Authentication-Info", "msrp.authentication.info",
FT_STRING, BASE_NONE,NULL,0x0,
NULL, HFILL }
},
{ &hf_msrp_data,
{ "Data", "msrp.data",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{ &hf_msrp_setup,
{ "Stream setup", "msrp.setup",
FT_STRING, BASE_NONE, NULL, 0x0,
"Stream setup, method and frame number", HFILL}
},
{ &hf_msrp_setup_frame,
{ "Setup frame", "msrp.setup-frame",
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
"Frame that set up this stream", HFILL}
},
{ &hf_msrp_setup_method,
{ "Setup Method", "msrp.setup-method",
FT_STRING, BASE_NONE, NULL, 0x0,
"Method used to set up this stream", HFILL}
},
};
module_t *msrp_module;
/* Register the protocol name and description */
proto_msrp = proto_register_protocol("Message Session Relay Protocol","MSRP", "msrp");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_msrp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
msrp_module = prefs_register_protocol(proto_msrp, NULL);
prefs_register_bool_preference(msrp_module, "display_raw_text",
"Display raw text for MSRP message",
"Specifies that the raw text of the "
"MSRP message should be displayed "
"in addition to the dissection tree",
&global_msrp_raw_text);
prefs_register_bool_preference(msrp_module, "show_setup_info",
"Show stream setup information",
"Where available, show which protocol and frame caused "
"this MSRP stream to be created",
&global_msrp_show_setup_info);
/*
* Register the dissector by name, so other dissectors can
* grab it by name rather than just referring to it directly.
*/
new_register_dissector("msrp", dissect_msrp, proto_msrp);
}
/* Register the protocol with Wireshark */
void
proto_reg_handoff_msrp(void)
{
msrp_handle = find_dissector("msrp");
dissector_add_handle("tcp.port", msrp_handle); /* for "decode-as" */
heur_dissector_add("tcp", dissect_msrp_heur, proto_msrp);
media_type_dissector_table = find_dissector_table("media_type");
}
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