243 lines
6.4 KiB
Ragel
243 lines
6.4 KiB
Ragel
/*
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* Copyright (C) 2010-2011 Mamadou Diop.
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*
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* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
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*
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* This file is part of Open Source Doubango Framework.
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*
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* DOUBANGO is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DOUBANGO 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 DOUBANGO.
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*
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*/
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/**@file tmedia_content_cpim.c
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* @brief Common Presence and Instant Messaging (CPIM): Message Format (RFC 3862)
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*
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* @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
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*
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*/
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#include "tinymedia/content/tmedia_content_cpim.h"
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#include "tsk_debug.h"
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#include "tsk_memory.h"
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#include "tsk_string.h"
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#include "tsk_ragel_state.h"
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#include <string.h>
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/* RFC 3862 - 2. Overall Message Structure
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A complete message looks something like this:
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m: Content-type: Message/CPIM
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s:
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h: (message-metadata-headers)
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s:
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e: (encapsulated MIME message-body)
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The end of the message body is defined by the framing mechanism of
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the protocol used. The tags 'm:', 's:', 'h:', 'e:', and 'x:' are not
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part of the message format and are used here to indicate the
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different parts of the message, thus:
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m: MIME headers for the overall message
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s: a blank separator line
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h: message headers
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e: encapsulated MIME object containing the message content
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x: MIME security multipart message wrapper
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*/
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/***********************************
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* Ragel state machine.
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*/
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%%{
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machine tmedia_machine_content_cpim;
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# Includes
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include tmedia_machine_utils "./tmedia_machine_utils.rl";
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action tag{
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tag_start = p;
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}
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action is_parsing_mime_headers{
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parsing_mime_headers = tsk_true;
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}
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action is_parsing_message_headers{
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parsing_mime_headers = tsk_false;
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}
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action parse_hname{
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TSK_PARSER_SET_STRING(hname);
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}
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action parse_hvalue{
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tmedia_content_header_t* header;
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TSK_PARSER_SET_STRING(hvalue);
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header = tmedia_content_header_create(hname, hvalue);
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TSK_FREE(hname); TSK_FREE(hvalue);
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if(parsing_mime_headers){
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if(!TMEDIA_CONTENT_CPIM(self)->m_headers){
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TMEDIA_CONTENT_CPIM(self)->m_headers = tsk_list_create();
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}
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tsk_list_push_back_data(TMEDIA_CONTENT_CPIM(self)->m_headers, (void**)&header);
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}
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else{
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if(!TMEDIA_CONTENT_CPIM(self)->h_headers){
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TMEDIA_CONTENT_CPIM(self)->h_headers = tsk_list_create();
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}
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tsk_list_push_back_data(TMEDIA_CONTENT_CPIM(self)->h_headers, (void**)&header);
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}
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}
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action parse_e{
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int len = (int)(p - tag_start);
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if(len && tag_start){
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if(TMEDIA_CONTENT_CPIM(self)->e){
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TSK_OBJECT_SAFE_FREE(TMEDIA_CONTENT_CPIM(self)->e); \
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}
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TMEDIA_CONTENT_CPIM(self)->e = tsk_buffer_create(tag_start, len);
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}
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}
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hname = token>tag %parse_hname;
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hvalue = any*>tag %parse_hvalue;
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Header = hname :>SP*:> ":" SP*<: hvalue :> CRLF;
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m = Header+ >is_parsing_mime_headers;
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s = CRLF;
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h = Header+ >is_parsing_message_headers;
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e = any*>tag %parse_e;
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# Entry point
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main := m s h s e;
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}%%
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static int tmedia_content_cpim_parse(tmedia_content_t* self, const void* in_data, tsk_size_t in_size)
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{
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int cs = 0;
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const char *p = in_data;
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const char *pe = p + in_size;
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const char *eof = pe;
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const char *tag_start;
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char* hname = tsk_null;
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char* hvalue = tsk_null;
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tsk_bool_t parsing_mime_headers = tsk_true;
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%%write data;
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%%write init;
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%%write exec;
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TSK_FREE(hname);
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TSK_FREE(hvalue);
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if( cs < %%{ write first_final; }%% ){
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TSK_DEBUG_ERROR("Failed to parse CPIM content");
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return -1;
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}
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return 0;
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}
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static tsk_buffer_t* tmedia_content_cpim_get_data(tmedia_content_t* self)
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{
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tsk_buffer_t* data = tsk_buffer_create_null();
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tmedia_content_cpim_t *cpim = TMEDIA_CONTENT_CPIM(self);
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const tsk_list_item_t* item;
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/*
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m: Content-type: Message/CPIM
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s:
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h: (message-metadata-headers)
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s:
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e: (encapsulated MIME message-body)
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x: MIME security multipart message wrapper
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*/
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if(cpim->m_headers){
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tsk_list_foreach(item, cpim->m_headers){
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char* hstring = tmedia_content_header_tostring(TMEDIA_CONTENT_HEADER(item->data));
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tsk_buffer_append_2(data, TSK_LIST_IS_LAST(cpim->m_headers, item) ? "%s\r\n\r\n" : "%s\r\n", hstring);
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TSK_FREE(hstring);
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}
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}
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if(cpim->h_headers){
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tsk_list_foreach(item, cpim->h_headers){
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char* hstring = tmedia_content_header_tostring(TMEDIA_CONTENT_HEADER(item->data));
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tsk_buffer_append_2(data, TSK_LIST_IS_LAST(cpim->h_headers, item) ? "%s\r\n\r\n" : "%s\r\n", hstring);
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TSK_FREE(hstring);
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}
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}
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if(cpim->e){
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tsk_buffer_append(data, TSK_BUFFER_DATA(cpim->e), TSK_BUFFER_SIZE(cpim->e));
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}
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if(cpim->x){
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tsk_buffer_append(data, TSK_BUFFER_DATA(cpim->x), TSK_BUFFER_SIZE(cpim->x));
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}
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return data;
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}
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//=================================================================================================
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// object/plugin definitions
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//
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/* constructor */
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static tsk_object_t* tmedia_content_cpim_ctor(tsk_object_t * self, va_list * app)
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{
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tmedia_content_cpim_t *cpim = self;
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if(cpim){
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/* init base: called by tmedia_content_create() */
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/* init self */
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}
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return self;
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}
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/* destructor */
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static tsk_object_t* tmedia_content_cpim_dtor(tsk_object_t * self)
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{
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tmedia_content_cpim_t *cpim = self;
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if(cpim){
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/* deinit base */
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tmedia_content_deinit(TMEDIA_CONTENT(cpim));
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/* deinit self */
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TSK_OBJECT_SAFE_FREE(cpim->m_headers);
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TSK_OBJECT_SAFE_FREE(cpim->h_headers);
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TSK_OBJECT_SAFE_FREE(cpim->e);
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TSK_OBJECT_SAFE_FREE(cpim->x);
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}
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return self;
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}
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/* object definition */
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static const tsk_object_def_t tmedia_content_cpim_def_s =
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{
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sizeof(tmedia_content_cpim_t),
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tmedia_content_cpim_ctor,
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tmedia_content_cpim_dtor,
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tsk_null,
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};
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/* plugin definition*/
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static const tmedia_content_plugin_def_t tmedia_content_cpim_plugin_def_s =
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{
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&tmedia_content_cpim_def_s,
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TMEDIA_CONTENT_CPIM_TYPE,
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tmedia_content_cpim_parse,
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tmedia_content_cpim_get_data
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};
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const tmedia_content_plugin_def_t *tmedia_content_cpim_plugin_def_t = &tmedia_content_cpim_plugin_def_s; |