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doubango/trunk/tinySIP/src/sigcomp/tsip_sigcomp.c

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/*
* Copyright (C) 2009 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
*
* 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 tsip_sigcomp.c
* @brief SigComp helper API.
*
* @author Mamadou Diop <diopmamadou(at)doubango.org>
*
* @date Created: Sat Nov 8 16:54:58 2009 mdiop
*/
#include "tinysip/sigcomp/tsip_sigcomp.h"
#include "tcomp_manager.h"
#include "tsk_safeobj.h"
#include "tsk_memory.h"
#include "tsk_string.h"
#include "tsk_list.h"
#include "tsk_debug.h"
#include <string.h> /* used by tsk_string.h macros */
/** SigComp compartment */
typedef struct tsip_sigcomp_compartment_s
{
TSK_DECLARE_OBJECT;
char* id;
uint64_t stream_id;
tcomp_result_t *decomp_result;
/* tinySigComp library is thread-safe but I prefer to add this
* tcomp_manager_provideCompartmentId() is unsafe */
TSK_DECLARE_SAFEOBJ;
}
tsip_sigcomp_compartment_t;
const tsk_object_def_t *tsip_sigcomp_compartment_def_t;
typedef tsk_list_t tsip_sigcomp_compartments_L_t;
/** SigComp handler */
typedef struct tsip_sigcomp_s
{
TSK_DECLARE_OBJECT;
tcomp_manager_handle_t *manager;
tsip_sigcomp_compartments_L_t* compartments;
TSK_DECLARE_SAFEOBJ;
}
tsip_sigcomp_t;
const tsk_object_def_t *tsip_sigcomp_def_t;
/*== Predicate function to find a compartment by id */
static int pred_find_compartment_by_id(const tsk_list_item_t *item, const void *id)
{
if(item && item->data){
tsip_sigcomp_compartment_t *compartment = item->data;
return tsk_strcmp(compartment->id, (const char*)id);
}
return -1;
}
/** Creates new SigComp handler
* @param cpb Cycles Per Bit (16, 32, 64 or 128)
* @param dms Decompression Memory Size (should be: 0, 2048, 4096, 8192, 16384, 32768, 65536 or 131072)
* @param sms State Memory Size (should be: 0, 2048, 4096, 8192, 16384, 32768, 65536 or 131072)
* @retval A pointer to a SigComp handler if succeed and Null otherwise.
*/
tsip_sigcomp_handle_t* tsip_sigcomp_handler_create(uint8_t cpb, uint32_t dms, uint32_t sms)
{
tsip_sigcomp_t* sigcomp = tsk_object_new(tsip_sigcomp_def_t);
/* create SigComp handler */
if(!sigcomp){
TSK_DEBUG_ERROR("Failed to create new SigComp handler");
return tsk_null;
}
/* create SigComp manager */
if(!(sigcomp->manager = tcomp_manager_create()) || !(sigcomp->compartments = tsk_list_create())){
TSK_DEBUG_ERROR("Failed to create new SigComp manager");
TSK_OBJECT_SAFE_FREE(sigcomp);
return tsk_null;
}
tcomp_manager_setCycles_Per_Bit(sigcomp->manager, cpb);
tcomp_manager_setDecompression_Memory_Size(sigcomp->manager, dms);
tcomp_manager_setState_Memory_Size(sigcomp->manager, sms);
return sigcomp;
}
/** Creates new SigComp handler
* Adds/Removes dictionaries. These dictionaries will be used both for compression and decompression.
* And this will apply to all compartments holded by the handler.
* @param self The SigComp manager holding the dictionaries to add/remove.
* @param sip_n_sdp Whether to add the SIP/SDP dictionary (RFC 3485). If @a tsk_false_t this dictionary will be added,
* otherwise it will be removed.
* @param pres Whether to add the Presence dictionary (RFC 5112). If @a tsk_false_t this dictionary will be added,
* otherwise it will be removed.
*/
int tsip_sigcomp_handler_set_dicts(tsip_sigcomp_handle_t* self, tsk_bool_t sip_n_sdp, tsk_bool_t pres)
{
tsip_sigcomp_t* sigcomp = self;
if(!sigcomp || !sigcomp->manager){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
tsk_safeobj_lock(sigcomp);
/* SIP/SDP (RFC 3485) */
if(sip_n_sdp){
tcomp_manager_addSipSdpDictionary(sigcomp->manager);
}
else{
// FIXME: To be implemented in tinySigComp
/* tcomp_manager_removeSipSdpDictionary(sigcomp->manager); */
}
/* SIP/SDP (RFC 5112) */
if(pres){
tcomp_manager_addPresenceDictionary(sigcomp->manager);
}
else{
// FIXME: To be implemented in tinySigComp
/* tcomp_manager_removePresenceDictionary(sigcomp->manager); */
}
tsk_safeobj_unlock(sigcomp);
return 0;
}
/** Adds new SigComp compartement to the handler
* @param self The SigComp handler
* @param comp_id The id of the new compartment to add
* @retval Zero if succeed and non-zero error code otherwise.
*/
int tsip_sigcomp_handler_add_compartment(tsip_sigcomp_handle_t* self, const char* comp_id)
{
tsip_sigcomp_compartment_t* compartment;
tsip_sigcomp_t* sigcomp = self;
int ret = -1;
if(!sigcomp || !comp_id){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
tsk_safeobj_lock(sigcomp);
/* check if we already have a compartment with the same id */
if(tsk_list_find_object_by_pred(sigcomp->compartments, pred_find_compartment_by_id, comp_id)){
TSK_DEBUG_ERROR("Failed to add new SigComp compartment. %s already exist.", comp_id);
ret = -2;
goto bail;
}
if((compartment = tsk_object_new(tsip_sigcomp_compartment_def_t))){
compartment->id = tsk_strdup(comp_id);
tcomp_result_setCompartmentId(compartment->decomp_result, compartment->id, tsk_strlen(compartment->id));
tsk_list_push_back_data(sigcomp->compartments, (void**)&compartment);
ret = 0;
goto bail;
}
else{
TSK_DEBUG_ERROR("Failed to create new SigComp compartment");
ret = -3;
goto bail;
}
bail:
tsk_safeobj_unlock(sigcomp);
return ret;
}
/** Removes a SigComp compartement from the handler
* @param self The SigComp handler
* @param comp_id The id of the new compartment to remove
* @retval Zero if succeed and non-zero error code otherwise.
*/
int tsip_sigcomp_handler_remove_compartment(tsip_sigcomp_handle_t* self, const char* comp_id)
{
tsip_sigcomp_t* sigcomp = self;
if(!sigcomp || !comp_id){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
tsk_safeobj_lock(sigcomp);
tsk_list_remove_item_by_pred(sigcomp->compartments, pred_find_compartment_by_id, comp_id);
tsk_safeobj_unlock(sigcomp);
return 0;
}
/** Close all SigComp compartments
* @param self The SigComp handler
*/
int tsip_sigcomp_close_all(tsip_sigcomp_handle_t* self)
{
tsip_sigcomp_t* sigcomp = self;
const tsk_list_item_t* item;
const char* comp_id;
if(!sigcomp){
return -1;
}
tsk_safeobj_lock(sigcomp);
tsk_list_foreach(item, sigcomp->compartments){
comp_id = ((tsip_sigcomp_compartment_t*)item->data)->id;
tcomp_manager_closeCompartment(sigcomp->manager, comp_id, tsk_strlen(comp_id));
}
tsk_safeobj_unlock(sigcomp);
return 0;
}
/** Compress a Sip message
* @param self The SigComp handler
* @param comp_id The id of the compartement to use for compression. This compartment should be previously added using
* @ref tsip_sigcomp_handler_add_compartment()
* @param is_stream Indicates whether we are about to compress a stream message or not
* @param in_data Sip input data to compress
* @param in_size The size of the Sip input data
* @param out_data A pointer to the output data where the compressed message will be copied. It's up to you to allocate
* this buffer before calling this function.
* @param out_maxsize The maximum size of the @a out_data. Used as guard to avoid buffer overflow.
* @retval Size of the compressed data.
*/
tsk_size_t tsip_sigcomp_handler_compress(tsip_sigcomp_handle_t* self, const char* comp_id, tsk_bool_t is_stream, const void* in_data, tsk_size_t in_size, void* out_data, tsk_size_t out_maxsize)
{
tsk_size_t out_size = 0;
tsip_sigcomp_compartment_t* compartment;
tsip_sigcomp_t* sigcomp = self;
if(!sigcomp || !in_data || !in_size || !out_data || !out_maxsize){
TSK_DEBUG_ERROR("Invalid parameter");
return 0;
}
/* find the compartment */
if(!(compartment = (tsip_sigcomp_compartment_t*)tsk_list_find_object_by_pred(sigcomp->compartments, pred_find_compartment_by_id, comp_id))){
TSK_DEBUG_ERROR("%s not a valid compartment Id", comp_id);
return 0;
}
/* take ownership and lock() */
compartment = tsk_object_ref(compartment); /* take ownership instead of locking the handler(which will lock all compartments) */
tsk_safeobj_lock(compartment);
/* compress the message */
out_size = tcomp_manager_compress(sigcomp->manager, compartment->id, tsk_strlen(compartment->id), in_data, in_size, out_data, out_maxsize, is_stream);
/* release ownership and unlock() */
tsk_safeobj_unlock(compartment);
tsk_object_unref(compartment);
return out_size;
}
/** UnCompress a SigComp message
* @param self The SigComp handler
* @param comp_id The compartment id to use after successful decompression.
* @param is_stream Indicates whether we are about to uncompress a stream message or not
* @param in_data A pointer to the SigComp buffer to decompress
* @param in_size The size of the SigComp buffer
* @param out_data A pointer to the output data where the uncompressed message will be copied. It's up to you to allocate
* this buffer before calling this function.
* @param out_maxsize The maximum size of the @a out_data. Used as guard to avoid buffer overflow.
* @param is_nack Used to signal whether the uncompressed (result) message is a NACK or a Sip Message.
* @retval Size of the uncompressed data.
*/
tsk_size_t tsip_sigcomp_handler_uncompress(tsip_sigcomp_handle_t* self, const char* comp_id, tsk_bool_t is_stream, const void* in_data, tsk_size_t in_size, void* out_data, tsk_size_t out_maxsize, tsk_bool_t* is_nack)
{
tsk_size_t out_size = 0;
tsip_sigcomp_compartment_t* compartment;
tsip_sigcomp_t* sigcomp = self;
if(!sigcomp || !in_data || !in_size || !out_data || !out_maxsize || !is_nack){
TSK_DEBUG_ERROR("Invalid parameter");
return 0;
}
/* find the compartment */
if(!(compartment = (tsip_sigcomp_compartment_t*)tsk_list_find_object_by_pred(sigcomp->compartments, pred_find_compartment_by_id, comp_id))){
TSK_DEBUG_ERROR("%s not a valid compartment Id", comp_id);
return 0;
}
*is_nack = tsk_false;
/* take ownership and lock() */
compartment = tsk_object_ref(compartment); /* take ownership instead of locking the handler(which will lock all compartments) */
tsk_safeobj_lock(compartment);
/* uncompress the message */
tcomp_result_setOutputBuffer(compartment->decomp_result, out_data, out_maxsize, is_stream, compartment->stream_id); // set the output buffer where to copy uncompressed message
out_size = tcomp_manager_decompress(sigcomp->manager, in_data, in_size, compartment->decomp_result);
if(out_size){
// provide the compartment id --> save temp states
tcomp_manager_provideCompartmentId(sigcomp->manager, compartment->decomp_result);
}
else{
if((*is_nack = compartment->decomp_result->isNack)){
tsk_size_t nack_info_size;
if(compartment->decomp_result->nack_info && (nack_info_size = tcomp_buffer_getSize(compartment->decomp_result->nack_info))){
out_size = (nack_info_size > out_maxsize) ? out_maxsize : nack_info_size;
memcpy(out_data, tcomp_buffer_getBuffer(compartment->decomp_result->nack_info), out_size);
TSK_DEBUG_INFO("We got a NACK to send()");
}
else{
TSK_DEBUG_INFO("We got a NACK from the remote party");
}
}
else{
/* Should never happen */
TSK_DEBUG_ERROR("SigComp decompression failed");
}
}
/* release ownership and unlock() */
tsk_safeobj_unlock(compartment);
tsk_object_unref(compartment);
return out_size;
}
/** Try to unCompress the next stream chunck. Must only be used with stream compartments.
* When you are dealing with stream stream transports, then you should call this function several times until
* it returns zero.
* @param self The SigComp handler
* @param comp_id The compartment id to use after successful decompression
* @param nack_data Pointer to the NACL message. We be filled only if @a is_nack is equal to @a tsk_true
* @param is_nack Used to signal whether the uncompressed (result) message is a NACK or a Sip Message.
* @retval Size of the uncompressed data plus size of all previously uncompressed chuncks except NACKs, if the uncompressed message isn't a NACK.
* If the uncompressed message is a NACK, then the returned size will be equal to the length of the NACK
* to send to the remote party.
*/
tsk_size_t tsip_sigcomp_handler_uncompress_next(tsip_sigcomp_handle_t* self, const char* comp_id, void** nack_data, tsk_bool_t* is_nack)
{
tsk_size_t out_size = 0;
tsip_sigcomp_compartment_t* compartment;
tsip_sigcomp_t* sigcomp = self;
if(!sigcomp || !is_nack || !nack_data){
TSK_DEBUG_ERROR("Invalid parameter");
return 0;
}
/* find the compartment */
if(!(compartment = (tsip_sigcomp_compartment_t*)tsk_list_find_object_by_pred(sigcomp->compartments, pred_find_compartment_by_id, comp_id))){
TSK_DEBUG_ERROR("%s not a valid compartment Id", comp_id);
return 0;
}
/* take ownership and lock() */
compartment = tsk_object_ref(compartment); /* take ownership instead of locking the handler(which will lock all compartments) */
tsk_safeobj_lock(compartment);
/* uncompress the next chunk
* the returned size the the total size which includes previous chuncks uncompressed
* using tsip_sigcomp_handler_uncompress()
*/
out_size = tcomp_manager_getNextStreamMessage(sigcomp->manager, compartment->decomp_result);
if(out_size){
// provide the compartment id --> save temp states
tcomp_manager_provideCompartmentId(sigcomp->manager, compartment->decomp_result);
}
else{
if((*is_nack = compartment->decomp_result->isNack)){
tsk_size_t nack_info_size;
if(compartment->decomp_result->nack_info && (nack_info_size = tcomp_buffer_getSize(compartment->decomp_result->nack_info))){
if((*nack_data = tsk_calloc(nack_info_size, sizeof(uint8_t)))){
memcpy(*nack_data, tcomp_buffer_getBuffer(compartment->decomp_result->nack_info), nack_info_size);
}
TSK_DEBUG_INFO("We got a NACK to send()");
}
else{
TSK_DEBUG_INFO("We got a NACK from the remote party");
}
}
else{
/* Should never happen */
TSK_DEBUG_ERROR("SigComp decompression failed");
}
}
/* release ownership and unlock() */
tsk_safeobj_unlock(compartment);
tsk_object_unref(compartment);
return out_size;
}
//===========================================================================
// SIP SigComp Handler object definition
//
static tsk_object_t* tsip_sigcomp_ctor(tsk_object_t * self, va_list * app)
{
tsip_sigcomp_t *sigcomp = self;
if(sigcomp){
/* Done by tsip_sigcomp_create()
sigcomp->manager = tcomp_manager_create();
sigcomp->compartments = tsk_list_create();
*/
tsk_safeobj_init(sigcomp);
}
return self;
}
static tsk_object_t* tsip_sigcomp_dtor(tsk_object_t * self)
{
tsip_sigcomp_t *sigcomp = self;
if(sigcomp){
TSK_OBJECT_SAFE_FREE(sigcomp->manager);
TSK_OBJECT_SAFE_FREE(sigcomp->compartments);
tsk_safeobj_deinit(sigcomp);
}
return self;
}
static const tsk_object_def_t tsip_sigcomp_def_s =
{
sizeof(tsip_sigcomp_t),
tsip_sigcomp_ctor,
tsip_sigcomp_dtor,
tsk_null,
};
const tsk_object_def_t *tsip_sigcomp_def_t = &tsip_sigcomp_def_s;
//===========================================================================
// SIP SigComp Compartment object definition
//
static tsk_object_t* tsip_sigcomp_compartment_ctor(tsk_object_t * self, va_list * app)
{
static uint64_t __unique_stream_id = 0;
tsip_sigcomp_compartment_t *compartment = self;
if(compartment){
compartment->decomp_result = tcomp_result_create();
compartment->stream_id = ++(__unique_stream_id);
tsk_safeobj_init(compartment);
}
return self;
}
static tsk_object_t* tsip_sigcomp_compartment_dtor(tsk_object_t * self)
{
tsip_sigcomp_compartment_t *compartment = self;
if(compartment){
TSK_FREE(compartment->id);
TSK_OBJECT_SAFE_FREE(compartment->decomp_result);
tsk_safeobj_deinit(compartment);
}
return self;
}
int tsip_sigcomp_compartment_cmp(const tsk_object_t * _c1, const tsk_object_t * _c2)
{
const tsip_sigcomp_compartment_t *c1 = _c1;
const tsip_sigcomp_compartment_t *c2 = _c2;
if(c1 && c2){
return tsk_strcmp(c1->id, c2->id);
}
else{
return (c1 - c2);
}
}
static const tsk_object_def_t tsip_sigcomp_compartment_def_s =
{
sizeof(tsip_sigcomp_compartment_t),
tsip_sigcomp_compartment_ctor,
tsip_sigcomp_compartment_dtor,
tsip_sigcomp_compartment_cmp,
};
const tsk_object_def_t *tsip_sigcomp_compartment_def_t = &tsip_sigcomp_compartment_def_s;
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