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/*
* ESG parser
*
* Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdlib.h>
#include <string.h>
#include <libesg/encapsulation/container.h>
#include <libesg/encapsulation/fragment_management_information.h>
#include <libesg/encapsulation/data_repository.h>
#include <libesg/encapsulation/string_repository.h>
#include <libesg/representation/init_message.h>
#include <libesg/transport/session_partition_declaration.h>
struct esg_container *esg_container_decode(uint8_t *buffer, uint32_t size) {
uint32_t pos;
struct esg_container *container;
struct esg_container_structure *structure;
struct esg_container_structure *last_structure;
uint8_t structure_index;
if ((buffer == NULL) || (size <= 1)) {
return NULL;
}
pos = 0;
container = (struct esg_container *) malloc(sizeof(struct esg_container));
memset(container, 0, sizeof(struct esg_container));
// Container header
container->header = (struct esg_container_header *) malloc(sizeof(struct esg_container_header));
memset(container->header, 0, sizeof(struct esg_container_header));
container->header->num_structures = buffer[pos];
pos += 1;
if (size < pos + (container->header->num_structures * 8)) {
esg_container_free(container);
return NULL;
}
last_structure = NULL;
for (structure_index = 0; structure_index < container->header->num_structures; structure_index++) {
structure = (struct esg_container_structure *) malloc(sizeof(struct esg_container_structure));
memset(structure, 0, sizeof(struct esg_container_structure));
structure->_next = NULL;
if (last_structure == NULL) {
container->header->structure_list = structure;
} else {
last_structure->_next = structure;
}
last_structure = structure;
structure->type = buffer[pos];
pos += 1;
structure->id = buffer[pos];
pos += 1;
structure->ptr = (buffer[pos] << 16) | (buffer[pos+1] << 8) | buffer[pos+2];
pos += 3;
structure->length = (buffer[pos] << 16) | (buffer[pos+1] << 8) | buffer[pos+2];
pos += 3;
if (size < (structure->ptr + structure->length)) {
esg_container_free(container);
return NULL;
}
// Decode structure
switch (structure->type) {
case 0x01: {
switch (structure->id) {
case 0x00: {
structure->data = (void *) esg_encapsulation_structure_decode(buffer + structure->ptr, structure->length);
break;
}
default: {
esg_container_free(container);
return NULL;
}
}
break;
}
case 0x02: {
switch (structure->id) {
case 0x00: {
structure->data = (void *) esg_string_repository_decode(buffer + structure->ptr, structure->length);
break;
}
default: {
esg_container_free(container);
return NULL;
}
}
break;
}
case 0x03: {
//TODO
break;
}
case 0x04: {
//TODO
break;
}
case 0x05: {
//TODO
break;
}
case 0xE0: {
switch (structure->id) {
case 0x00: {
structure->data = (void *) esg_data_repository_decode(buffer + structure->ptr, structure->length);
break;
}
default: {
esg_container_free(container);
return NULL;
}
}
break;
}
case 0xE1: {
switch (structure->id) {
case 0xFF: {
structure->data = (void *) esg_session_partition_declaration_decode(buffer + structure->ptr, structure->length);
break;
}
default: {
esg_container_free(container);
return NULL;
}
}
break;
}
case 0xE2: {
switch (structure->id) {
case 0x00: {
structure->data = (void *) esg_init_message_decode(buffer + structure->ptr, structure->length);
break;
}
default: {
esg_container_free(container);
return NULL;
}
}
break;
}
default: {
esg_container_free(container);
return NULL;
}
}
}
// Container structure body
container->structure_body_ptr = pos;
container->structure_body_length = size - pos;
container->structure_body = (uint8_t *) malloc(size - pos);
memcpy(container->structure_body, buffer + pos, size - pos);
return container;
}
void esg_container_free(struct esg_container *container) {
struct esg_container_structure *structure;
struct esg_container_structure *next_structure;
if (container == NULL) {
return;
}
if (container->header) {
for(structure = container->header->structure_list; structure; structure = next_structure) {
next_structure = structure->_next;
free(structure);
}
free(container->header);
}
if (container->structure_body) {
free(container->structure_body);
}
free(container);
}
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