123
MQTTSNUnsubscribeServer.c
- Committer:
- icraggs
- Date:
- 2016-01-06
- Revision:
- 1:7fa362fa563f
- Parent:
- 0:c524a894b5e8
File content as of revision 1:7fa362fa563f:
/******************************************************************************* * Copyright (c) 2014 IBM Corp. * * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * and Eclipse Distribution License v1.0 which accompany this distribution. * * The Eclipse Public License is available at * http://www.eclipse.org/legal/epl-v10.html * and the Eclipse Distribution License is available at * http://www.eclipse.org/org/documents/edl-v10.php. * * Contributors: * Ian Craggs - initial API and implementation and/or initial documentation *******************************************************************************/ #include "StackTrace.h" #include "MQTTSNPacket.h" int MQTTSNDeserialize_unsubscribe(unsigned short* packetid, MQTTSN_topicid* topicFilter, unsigned char* buf, int buflen) { MQTTSNFlags flags; unsigned char* curdata = buf; unsigned char* enddata = NULL; int rc = 0; int mylen = 0; FUNC_ENTRY; curdata += (rc = MQTTSNPacket_decode(curdata, buflen, &mylen)); /* read length */ enddata = buf + mylen; if (enddata - curdata > buflen) goto exit; if (MQTTSNPacket_readChar(&curdata) != MQTTSN_UNSUBSCRIBE) goto exit; flags.all = MQTTSNPacket_readChar(&curdata); *packetid = MQTTSNPacket_readInt(&curdata); topicFilter->type = flags.bits.topicIdType; if (topicFilter->type == MQTTSN_TOPIC_TYPE_NORMAL) { topicFilter->data.long_.len = enddata - curdata; topicFilter->data.long_.name = (char*)curdata; } else if (topicFilter->type == MQTTSN_TOPIC_TYPE_PREDEFINED) topicFilter->data.id = MQTTSNPacket_readInt(&curdata); else if (topicFilter->type == MQTTSN_TOPIC_TYPE_SHORT) { topicFilter->data.short_name[0] = MQTTSNPacket_readChar(&curdata); topicFilter->data.short_name[1] = MQTTSNPacket_readChar(&curdata); } rc = 1; exit: FUNC_EXIT_RC(rc); return rc; } int MQTTSNSerialize_unsuback(unsigned char* buf, int buflen, unsigned short packetid) { unsigned char *ptr = buf; int len = 0; int rc = 0; FUNC_ENTRY; if ((len = MQTTSNPacket_len(7)) > buflen) { rc = MQTTSNPACKET_BUFFER_TOO_SHORT; goto exit; } ptr += MQTTSNPacket_encode(ptr, len); /* write length */ MQTTSNPacket_writeChar(&ptr, MQTTSN_UNSUBACK); /* write message type */ MQTTSNPacket_writeInt(&ptr, packetid); rc = ptr - buf; exit: FUNC_EXIT_RC(rc); return rc; }