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author | Mark Purcell <msp@debian.org> | 2008-06-22 11:00:40 +1000 |
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committer | etobi <git@e-tobi.net> | 2013-09-03 09:48:42 +0200 |
commit | 891c51ff368ed700dec6025eeb47ce4d96f76418 (patch) | |
tree | 3729664829e4faa691d403274f38eb10890b533c /lib/libesg/transport/session_partition_declaration.c | |
parent | 1c6e1f28f54ec2606c23936c1d8689f2be55a86c (diff) | |
parent | ab959d7b4194715870128e616b8e29d4a101e488 (diff) | |
download | linux-dvb-apps-a966623153d5c69ef156542.tar.gz |
Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1
Diffstat (limited to 'lib/libesg/transport/session_partition_declaration.c')
-rw-r--r-- | lib/libesg/transport/session_partition_declaration.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/lib/libesg/transport/session_partition_declaration.c b/lib/libesg/transport/session_partition_declaration.c new file mode 100644 index 0000000..d590bd3 --- /dev/null +++ b/lib/libesg/transport/session_partition_declaration.c @@ -0,0 +1,253 @@ +/* + * 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/transport/session_partition_declaration.h> + +struct esg_session_partition_declaration *esg_session_partition_declaration_decode(uint8_t *buffer, uint32_t size) { + uint32_t pos; + struct esg_session_partition_declaration *partition; + struct esg_session_field *field; + struct esg_session_field *last_field; + uint8_t field_index; + struct esg_session_ip_stream *ip_stream; + struct esg_session_ip_stream *last_ip_stream; + uint8_t ip_stream_index; + uint8_t ip_index; + struct esg_session_ip_stream_field *ip_stream_field; + struct esg_session_ip_stream_field *last_ip_stream_field; + uint8_t *field_buffer; + uint32_t field_length; + union esg_session_ip_stream_field_value *field_value; + + if ((buffer == NULL) || (size <= 2)) { + return NULL; + } + + pos = 0; + + partition = (struct esg_session_partition_declaration *) malloc(sizeof(struct esg_session_partition_declaration)); + memset(partition, 0, sizeof(struct esg_session_partition_declaration)); + partition->field_list = NULL; + partition->ip_stream_list = NULL; + + partition->num_fields = buffer[pos]; + pos += 1; + + partition->overlapping = (buffer[pos] & 0x80) ? 1 : 0; + pos += 1; + + if (size < (pos + 5*(partition->num_fields))) { + esg_session_partition_declaration_free(partition); + return NULL; + } + + last_field = NULL; + for (field_index = 0; field_index < partition->num_fields; field_index++) { + field = (struct esg_session_field *) malloc(sizeof(struct esg_session_field)); + memset(field, 0, sizeof(struct esg_session_field)); + field->_next = NULL; + + if (last_field == NULL) { + partition->field_list = field; + } else { + last_field->_next = field; + } + last_field = field; + + field->identifier = (buffer[pos] << 8) | buffer[pos+1]; + pos += 2; + + field->encoding = (buffer[pos] << 8) | buffer[pos+1]; + pos += 2; + + field->length = buffer[pos]; + pos += 1; + } + + partition->n_o_ip_streams = buffer[pos]; + pos += 1; + + partition->ip_version_6 = (buffer[pos] & 0x80) ? 1 : 0; + pos += 1; + + last_ip_stream = NULL; + for (ip_stream_index = 0; ip_stream_index < partition->n_o_ip_streams; ip_stream_index++) { + ip_stream = (struct esg_session_ip_stream *) malloc(sizeof(struct esg_session_ip_stream)); + memset(ip_stream, 0, sizeof(struct esg_session_ip_stream)); + ip_stream->_next = NULL; + + if (last_ip_stream == NULL) { + partition->ip_stream_list = ip_stream; + } else { + last_ip_stream->_next = ip_stream; + } + last_ip_stream = ip_stream; + + ip_stream->id = buffer[pos]; + pos += 1; + + if (partition->ip_version_6) { + for (ip_index = 0; ip_index < 16; ip_index++) { + ip_stream->source_ip.ipv6[ip_index] = buffer[pos+ip_index]; + ip_stream->destination_ip.ipv6[ip_index] = buffer[pos+16+ip_index]; + } + pos += 32; + } else { + for (ip_index = 0; ip_index < 4; ip_index++) { + ip_stream->source_ip.ipv4[ip_index] = buffer[pos+ip_index]; + ip_stream->destination_ip.ipv4[ip_index] = buffer[pos+4+ip_index]; + } + pos += 8; + } + ip_stream->port = (buffer[pos] << 8) | buffer[pos+1]; + pos += 2; + + ip_stream->session_id = (buffer[pos] << 8) | buffer[pos+1]; + pos += 2; + + last_ip_stream_field = NULL; + esg_session_partition_declaration_field_list_for_each(partition, field) { + ip_stream_field = (struct esg_session_ip_stream_field *) malloc(sizeof(struct esg_session_ip_stream_field)); + memset(ip_stream_field, 0, sizeof(struct esg_session_ip_stream_field)); + ip_stream_field->_next = NULL; + ip_stream_field->start_field_value = NULL; + ip_stream_field->end_field_value = NULL; + + if (last_ip_stream_field == NULL) { + ip_stream->field_list = ip_stream_field; + } else { + last_ip_stream_field->_next = ip_stream_field; + } + last_ip_stream_field = ip_stream_field; + + field_length = field->length; + if (field->length != 0) { + field_length = field->length; + } else { + pos += vluimsbf8(buffer + pos, size - pos, &field_length); + } + + switch (field->encoding) { + case 0x0000: { + if (partition->overlapping == 1) { + field_value = (union esg_session_ip_stream_field_value *) malloc(sizeof(union esg_session_ip_stream_field_value)); + memset(field_value, 0, sizeof(union esg_session_ip_stream_field_value)); + ip_stream_field->start_field_value = field_value; + + field_buffer = (uint8_t *) malloc(field_length); + memset(field_buffer, 0, field_length); + memcpy(field_buffer, buffer + pos, field_length); + + ip_stream_field->start_field_value->string = field_buffer; + pos += field_length; + } + field_value = (union esg_session_ip_stream_field_value *) malloc(sizeof(union esg_session_ip_stream_field_value)); + memset(field_value, 0, sizeof(union esg_session_ip_stream_field_value)); + ip_stream_field->end_field_value = field_value; + + field_buffer = (uint8_t *) malloc(field_length); + memset(field_buffer, 0, field_length); + memcpy(field_buffer, buffer + pos, field_length); + + ip_stream_field->end_field_value->string = field_buffer; + pos += field_length; + + break; + } + case 0x0101: { + if (partition->overlapping == 1) { + field_value = (union esg_session_ip_stream_field_value *) malloc(sizeof(union esg_session_ip_stream_field_value)); + memset(field_value, 0, sizeof(union esg_session_ip_stream_field_value)); + ip_stream_field->start_field_value = field_value; + + ip_stream_field->start_field_value->unsigned_short = (buffer[pos] << 8) | buffer[pos+1]; + pos += field_length; + } + field_value = (union esg_session_ip_stream_field_value *) malloc(sizeof(union esg_session_ip_stream_field_value)); + memset(field_value, 0, sizeof(union esg_session_ip_stream_field_value)); + ip_stream_field->end_field_value = field_value; + + ip_stream_field->end_field_value->unsigned_short = (buffer[pos] << 8) | buffer[pos+1]; + pos += field_length; + + break; + } + default: { + esg_session_partition_declaration_free(partition); + return NULL; + } + } + } + } + + return partition; +} + +void esg_session_partition_declaration_free(struct esg_session_partition_declaration *partition) { + struct esg_session_field *field; + struct esg_session_field *next_field; + struct esg_session_ip_stream *ip_stream; + struct esg_session_ip_stream *next_ip_stream; + struct esg_session_ip_stream_field *ip_stream_field; + struct esg_session_ip_stream_field *next_ip_stream_field; + + if (partition == NULL) { + return; + } + + for(ip_stream = partition->ip_stream_list; ip_stream; ip_stream = next_ip_stream) { + next_ip_stream = ip_stream->_next; + + field = partition->field_list; + for(ip_stream_field = next_ip_stream->field_list; ip_stream_field; ip_stream_field = next_ip_stream_field) { + next_ip_stream_field = ip_stream_field->_next; + + switch (field->encoding) { + case 0x0000: { + if (ip_stream_field->start_field_value != NULL) { + free(ip_stream_field->start_field_value->string); + } + free(ip_stream_field->end_field_value->string); + break; + } + case 0x0101: { + // Nothing to free + break; + } + } + + free(ip_stream_field); + + field = field->_next; + } + + free(ip_stream); + } + + for(field = partition->field_list; field; field = next_field) { + next_field = field->_next; + free(field); + } + + free(partition); +} |