mirror of
https://github.com/eclipse/paho.mqtt-sn.embedded-c.git
synced 2025-12-13 23:46:51 +01:00
5c278f1aec
error occurs. Do not store the length of packet into rc. If the packet is incorrect, skip the processing that follows. Bugfix: Print out the value of TopicId in SUBACK and UNSUBACK. Signed-off-by: tomoaki <tomoaki@tomy-tech.com>
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/*******************************************************************************
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* Copyright (c) 2014 IBM Corp.
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*
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* and Eclipse Distribution License v1.0 which accompany this distribution.
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*
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* The Eclipse Public License is available at
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* http://www.eclipse.org/legal/epl-v10.html
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* and the Eclipse Distribution License is available at
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* http://www.eclipse.org/org/documents/edl-v10.php.
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*
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* Contributors:
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* Ian Craggs - initial API and implementation and/or initial documentation
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*******************************************************************************/
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#include "MQTTSNPacket.h"
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#include "StackTrace.h"
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#include <string.h>
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/**
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* Serializes the supplied advertise data into the supplied buffer, ready for sending
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* @param buf the buffer into which the packet will be serialized
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* @param buflen the length in bytes of the supplied buffer
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* @param radius the broadcast radius of this message
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* @param duration - the time interval until the next advertise will be sent
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* @return the length of the serialized data. <= 0 indicates error
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*/
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int MQTTSNSerialize_advertise(unsigned char* buf, int buflen, unsigned char gatewayid, unsigned short duration)
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{
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unsigned char *ptr = buf;
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int len = 0;
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int rc = 0;
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FUNC_ENTRY;
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if ((len = MQTTSNPacket_len(4)) > buflen)
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{
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rc = MQTTSNPACKET_BUFFER_TOO_SHORT;
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goto exit;
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}
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ptr += MQTTSNPacket_encode(ptr, len); /* write length */
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writeChar(&ptr, MQTTSN_ADVERTISE); /* write message type */
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writeChar(&ptr, gatewayid);
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writeInt(&ptr, duration);
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rc = ptr - buf;
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exit:
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FUNC_EXIT_RC(rc);
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return rc;
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}
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/**
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* Deserializes the supplied (wire) buffer into searchgw data
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* @param radius the returned broadcast radius of this message
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* @param buf the raw buffer data, of the correct length determined by the remaining length field
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* @param buflen the length in bytes of the data in the supplied buffer
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* @return error code. 1 is success
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*/
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int MQTTSNDeserialize_searchgw(unsigned char* radius, unsigned char* buf, int buflen)
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{
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unsigned char* curdata = buf;
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unsigned char* enddata = NULL;
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int rc = 0;
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int mylen = 0;
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FUNC_ENTRY;
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curdata += MQTTSNPacket_decode(curdata, buflen, &mylen); /* read length */
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enddata = buf + mylen;
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if (enddata - curdata > buflen)
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goto exit;
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if (readChar(&curdata) != MQTTSN_SEARCHGW)
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goto exit;
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*radius = readChar(&curdata);
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rc = 1;
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exit:
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FUNC_EXIT_RC(rc);
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return rc;
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}
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/**
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* Serializes the supplied gwinfo data into the supplied buffer, ready for sending
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* @param buf the buffer into which the packet will be serialized
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* @param buflen the length in bytes of the supplied buffer
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* @param gatewayid the gateway id
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* @param gatewayaddress_len the optional length of the gateway address (0 if none)
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* @param gatewayaddress the optional gateway address (NULL if none)
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* @return the length of the serialized data. <= 0 indicates error
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*/
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int MQTTSNSerialize_gwinfo(unsigned char* buf, int buflen, unsigned char gatewayid, unsigned short gatewayaddress_len,
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unsigned char* gatewayaddress)
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{
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unsigned char *ptr = buf;
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int len = 0;
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int rc = 0;
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FUNC_ENTRY;
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if ((len = MQTTSNPacket_len(2 + gatewayaddress_len)) > buflen)
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{
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rc = MQTTSNPACKET_BUFFER_TOO_SHORT;
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goto exit;
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}
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ptr += MQTTSNPacket_encode(ptr, len); /* write length */
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writeChar(&ptr, MQTTSN_GWINFO); /* write message type */
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writeChar(&ptr, gatewayid);
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if (gatewayaddress_len > 0 && gatewayaddress != NULL)
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{
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memcpy(ptr, gatewayaddress, gatewayaddress_len);
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ptr += gatewayaddress_len;
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}
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rc = ptr - buf;
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exit:
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FUNC_EXIT_RC(rc);
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return rc;
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}
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