| c732d49e |
/*
* Copyright (C) 2010-2015 Mamadou DIOP.
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO 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 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO 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 DOUBANGO.
*
*/
/**@file tmedia_content_cpim.c
* @brief Common Presence and Instant Messaging (CPIM): Message Format (RFC 3862)
*/
#include "tinymedia/content/tmedia_content_cpim.h"
#include "tsk_debug.h"
#include "tsk_memory.h"
#include "tsk_string.h"
#include "tsk_ragel_state.h"
#include <string.h>
/* RFC 3862 - 2. Overall Message Structure
A complete message looks something like this:
m: Content-type: Message/CPIM
s:
h: (message-metadata-headers)
s:
e: (encapsulated MIME message-body)
The end of the message body is defined by the framing mechanism of
the protocol used. The tags 'm:', 's:', 'h:', 'e:', and 'x:' are not
part of the message format and are used here to indicate the
different parts of the message, thus:
m: MIME headers for the overall message
s: a blank separator line
h: message headers
e: encapsulated MIME object containing the message content
x: MIME security multipart message wrapper
*/
/***********************************
* Ragel state machine.
*/
%%{
machine tmedia_machine_content_cpim;
# Includes
include tmedia_machine_utils "./ragel/tmedia_machine_utils.rl";
action tag{
tag_start = p;
}
action is_parsing_mime_headers{
parsing_mime_headers = tsk_true;
}
action is_parsing_message_headers{
parsing_mime_headers = tsk_false;
}
action parse_hname{
TSK_PARSER_SET_STRING(hname);
}
action parse_hvalue{
tmedia_content_header_t* header;
TSK_PARSER_SET_STRING(hvalue);
header = tmedia_content_header_create(hname, hvalue);
TSK_FREE(hname); TSK_FREE(hvalue);
if(parsing_mime_headers){
if(!TMEDIA_CONTENT_CPIM(self)->m_headers){
TMEDIA_CONTENT_CPIM(self)->m_headers = tsk_list_create();
}
tsk_list_push_back_data(TMEDIA_CONTENT_CPIM(self)->m_headers, (void**)&header);
}
else{
if(!TMEDIA_CONTENT_CPIM(self)->h_headers){
TMEDIA_CONTENT_CPIM(self)->h_headers = tsk_list_create();
}
tsk_list_push_back_data(TMEDIA_CONTENT_CPIM(self)->h_headers, (void**)&header);
}
}
action parse_e{
int len = (int)(p - tag_start);
if(len && tag_start){
if(TMEDIA_CONTENT_CPIM(self)->e){
TSK_OBJECT_SAFE_FREE(TMEDIA_CONTENT_CPIM(self)->e); \
}
TMEDIA_CONTENT_CPIM(self)->e = tsk_buffer_create(tag_start, len);
}
}
hname = token>tag %parse_hname;
hvalue = any*>tag %parse_hvalue;
Header = hname :>SP*:> ":" SP*<: hvalue :> CRLF;
m = Header+ >is_parsing_mime_headers;
s = CRLF;
h = Header+ >is_parsing_message_headers;
e = any*>tag %parse_e;
# Entry point
main := m s h s e;
}%%
static int tmedia_content_cpim_parse(tmedia_content_t* self, const void* in_data, tsk_size_t in_size)
{
int cs = 0;
const char *p = in_data;
const char *pe = p + in_size;
const char *eof = pe;
const char *tag_start = tsk_null;
char* hname = tsk_null;
char* hvalue = tsk_null;
tsk_bool_t parsing_mime_headers = tsk_true;
TSK_RAGEL_DISABLE_WARNINGS_BEGIN()
%%write data;
(void)(eof);
(void)(tmedia_machine_content_cpim_first_final);
(void)(tmedia_machine_content_cpim_error);
(void)(tmedia_machine_content_cpim_en_main);
%%write init;
%%write exec;
TSK_RAGEL_DISABLE_WARNINGS_END()
TSK_FREE(hname);
TSK_FREE(hvalue);
if( cs < %%{ write first_final; }%% ){
TSK_DEBUG_ERROR("Failed to parse CPIM content");
return -1;
}
return 0;
}
static tsk_buffer_t* tmedia_content_cpim_get_data(tmedia_content_t* self)
{
tsk_buffer_t* data = tsk_buffer_create_null();
tmedia_content_cpim_t *cpim = TMEDIA_CONTENT_CPIM(self);
const tsk_list_item_t* item;
/*
m: Content-type: Message/CPIM
s:
h: (message-metadata-headers)
s:
e: (encapsulated MIME message-body)
x: MIME security multipart message wrapper
*/
if(cpim->m_headers){
tsk_list_foreach(item, cpim->m_headers){
char* hstring = tmedia_content_header_tostring(TMEDIA_CONTENT_HEADER(item->data));
tsk_buffer_append_2(data, TSK_LIST_IS_LAST(cpim->m_headers, item) ? "%s\r\n\r\n" : "%s\r\n", hstring);
TSK_FREE(hstring);
}
}
if(cpim->h_headers){
tsk_list_foreach(item, cpim->h_headers){
char* hstring = tmedia_content_header_tostring(TMEDIA_CONTENT_HEADER(item->data));
tsk_buffer_append_2(data, TSK_LIST_IS_LAST(cpim->h_headers, item) ? "%s\r\n\r\n" : "%s\r\n", hstring);
TSK_FREE(hstring);
}
}
if(cpim->e){
tsk_buffer_append(data, TSK_BUFFER_DATA(cpim->e), TSK_BUFFER_SIZE(cpim->e));
}
if(cpim->x){
tsk_buffer_append(data, TSK_BUFFER_DATA(cpim->x), TSK_BUFFER_SIZE(cpim->x));
}
return data;
}
//=================================================================================================
// object/plugin definitions
//
/* constructor */
static tsk_object_t* tmedia_content_cpim_ctor(tsk_object_t * self, va_list * app)
{
tmedia_content_cpim_t *cpim = self;
if(cpim){
/* init base: called by tmedia_content_create() */
/* init self */
}
return self;
}
/* destructor */
static tsk_object_t* tmedia_content_cpim_dtor(tsk_object_t * self)
{
tmedia_content_cpim_t *cpim = self;
if(cpim){
/* deinit base */
tmedia_content_deinit(TMEDIA_CONTENT(cpim));
/* deinit self */
TSK_OBJECT_SAFE_FREE(cpim->m_headers);
TSK_OBJECT_SAFE_FREE(cpim->h_headers);
TSK_OBJECT_SAFE_FREE(cpim->e);
TSK_OBJECT_SAFE_FREE(cpim->x);
}
return self;
}
/* object definition */
static const tsk_object_def_t tmedia_content_cpim_def_s =
{
sizeof(tmedia_content_cpim_t),
tmedia_content_cpim_ctor,
tmedia_content_cpim_dtor,
tsk_null,
};
/* plugin definition*/
static const tmedia_content_plugin_def_t tmedia_content_cpim_plugin_def_s =
{
&tmedia_content_cpim_def_s,
TMEDIA_CONTENT_CPIM_TYPE,
tmedia_content_cpim_parse,
tmedia_content_cpim_get_data
};
const tmedia_content_plugin_def_t *tmedia_content_cpim_plugin_def_t = &tmedia_content_cpim_plugin_def_s; |