123
MQTTSNSerializePublish.c@0:c524a894b5e8, 2015-02-26 (annotated)
- Committer:
- icraggs
- Date:
- Thu Feb 26 15:59:36 2015 +0000
- Revision:
- 0:c524a894b5e8
- Child:
- 1:7fa362fa563f
First version that works nicely :-)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
icraggs | 0:c524a894b5e8 | 1 | /******************************************************************************* |
icraggs | 0:c524a894b5e8 | 2 | * Copyright (c) 2014 IBM Corp. |
icraggs | 0:c524a894b5e8 | 3 | * |
icraggs | 0:c524a894b5e8 | 4 | * All rights reserved. This program and the accompanying materials |
icraggs | 0:c524a894b5e8 | 5 | * are made available under the terms of the Eclipse Public License v1.0 |
icraggs | 0:c524a894b5e8 | 6 | * and Eclipse Distribution License v1.0 which accompany this distribution. |
icraggs | 0:c524a894b5e8 | 7 | * |
icraggs | 0:c524a894b5e8 | 8 | * The Eclipse Public License is available at |
icraggs | 0:c524a894b5e8 | 9 | * http://www.eclipse.org/legal/epl-v10.html |
icraggs | 0:c524a894b5e8 | 10 | * and the Eclipse Distribution License is available at |
icraggs | 0:c524a894b5e8 | 11 | * http://www.eclipse.org/org/documents/edl-v10.php. |
icraggs | 0:c524a894b5e8 | 12 | * |
icraggs | 0:c524a894b5e8 | 13 | * Contributors: |
icraggs | 0:c524a894b5e8 | 14 | * Ian Craggs - initial API and implementation and/or initial documentation |
icraggs | 0:c524a894b5e8 | 15 | *******************************************************************************/ |
icraggs | 0:c524a894b5e8 | 16 | |
icraggs | 0:c524a894b5e8 | 17 | #include "MQTTSNPacket.h" |
icraggs | 0:c524a894b5e8 | 18 | #include "StackTrace.h" |
icraggs | 0:c524a894b5e8 | 19 | |
icraggs | 0:c524a894b5e8 | 20 | #include <string.h> |
icraggs | 0:c524a894b5e8 | 21 | |
icraggs | 0:c524a894b5e8 | 22 | |
icraggs | 0:c524a894b5e8 | 23 | /** |
icraggs | 0:c524a894b5e8 | 24 | * Determines the length of the MQTT publish packet that would be produced using the supplied parameters |
icraggs | 0:c524a894b5e8 | 25 | * @param qos the MQTT QoS of the publish (packetid is omitted for QoS 0) |
icraggs | 0:c524a894b5e8 | 26 | * @param topicName the topic name to be used in the publish |
icraggs | 0:c524a894b5e8 | 27 | * @param payloadlen the length of the payload to be sent |
icraggs | 0:c524a894b5e8 | 28 | * @return the length of buffer needed to contain the serialized version of the packet |
icraggs | 0:c524a894b5e8 | 29 | */ |
icraggs | 0:c524a894b5e8 | 30 | int MQTTSNSerialize_publishLength(int payloadlen, MQTTSN_topicid topic, int qos) |
icraggs | 0:c524a894b5e8 | 31 | { |
icraggs | 0:c524a894b5e8 | 32 | int len = 6; |
icraggs | 0:c524a894b5e8 | 33 | |
icraggs | 0:c524a894b5e8 | 34 | if (topic.type == MQTTSN_TOPIC_TYPE_NORMAL && qos == 3) |
icraggs | 0:c524a894b5e8 | 35 | len += topic.data.long_.len; |
icraggs | 0:c524a894b5e8 | 36 | |
icraggs | 0:c524a894b5e8 | 37 | return payloadlen + len; |
icraggs | 0:c524a894b5e8 | 38 | } |
icraggs | 0:c524a894b5e8 | 39 | |
icraggs | 0:c524a894b5e8 | 40 | |
icraggs | 0:c524a894b5e8 | 41 | /** |
icraggs | 0:c524a894b5e8 | 42 | * Serializes the supplied publish data into the supplied buffer, ready for sending |
icraggs | 0:c524a894b5e8 | 43 | * @param buf the buffer into which the packet will be serialized |
icraggs | 0:c524a894b5e8 | 44 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 0:c524a894b5e8 | 45 | * @param dup integer - the MQTT dup flag |
icraggs | 0:c524a894b5e8 | 46 | * @param qos integer - the MQTT QoS value |
icraggs | 0:c524a894b5e8 | 47 | * @param retained integer - the MQTT retained flag |
icraggs | 0:c524a894b5e8 | 48 | * @param packetid integer - the MQTT packet identifier |
icraggs | 0:c524a894b5e8 | 49 | * @param topic MQTTSN_topicid - the MQTT topic in the publish |
icraggs | 0:c524a894b5e8 | 50 | * @param payload byte buffer - the MQTT publish payload |
icraggs | 0:c524a894b5e8 | 51 | * @param payloadlen integer - the length of the MQTT payload |
icraggs | 0:c524a894b5e8 | 52 | * @return the length of the serialized data. <= 0 indicates error |
icraggs | 0:c524a894b5e8 | 53 | */ |
icraggs | 0:c524a894b5e8 | 54 | int MQTTSNSerialize_publish(unsigned char* buf, int buflen, unsigned char dup, int qos, unsigned char retained, unsigned short packetid, |
icraggs | 0:c524a894b5e8 | 55 | MQTTSN_topicid topic, unsigned char* payload, int payloadlen) |
icraggs | 0:c524a894b5e8 | 56 | { |
icraggs | 0:c524a894b5e8 | 57 | unsigned char *ptr = buf; |
icraggs | 0:c524a894b5e8 | 58 | MQTTSNFlags flags; |
icraggs | 0:c524a894b5e8 | 59 | int len = 0; |
icraggs | 0:c524a894b5e8 | 60 | int rc = 0; |
icraggs | 0:c524a894b5e8 | 61 | |
icraggs | 0:c524a894b5e8 | 62 | FUNC_ENTRY; |
icraggs | 0:c524a894b5e8 | 63 | if ((len = MQTTSNPacket_len(MQTTSNSerialize_publishLength(payloadlen, topic, qos))) > buflen) |
icraggs | 0:c524a894b5e8 | 64 | { |
icraggs | 0:c524a894b5e8 | 65 | rc = MQTTSNPACKET_BUFFER_TOO_SHORT; |
icraggs | 0:c524a894b5e8 | 66 | goto exit; |
icraggs | 0:c524a894b5e8 | 67 | } |
icraggs | 0:c524a894b5e8 | 68 | ptr += MQTTSNPacket_encode(ptr, len); /* write length */ |
icraggs | 0:c524a894b5e8 | 69 | writeChar(&ptr, MQTTSN_PUBLISH); /* write message type */ |
icraggs | 0:c524a894b5e8 | 70 | |
icraggs | 0:c524a894b5e8 | 71 | flags.all = 0; |
icraggs | 0:c524a894b5e8 | 72 | flags.bits.dup = dup; |
icraggs | 0:c524a894b5e8 | 73 | flags.bits.QoS = qos; |
icraggs | 0:c524a894b5e8 | 74 | flags.bits.retain = retained; |
icraggs | 0:c524a894b5e8 | 75 | flags.bits.topicIdType = topic.type; |
icraggs | 0:c524a894b5e8 | 76 | writeChar(&ptr, flags.all); |
icraggs | 0:c524a894b5e8 | 77 | |
icraggs | 0:c524a894b5e8 | 78 | if (topic.type == MQTTSN_TOPIC_TYPE_NORMAL && qos == 3) |
icraggs | 0:c524a894b5e8 | 79 | { |
icraggs | 0:c524a894b5e8 | 80 | /* special arrangement for long topic names in QoS -1 publishes. The length of the topic is in the topicid field */ |
icraggs | 0:c524a894b5e8 | 81 | writeInt(&ptr, topic.data.long_.len); /* topic length */ |
icraggs | 0:c524a894b5e8 | 82 | } |
icraggs | 0:c524a894b5e8 | 83 | else if (topic.type == MQTTSN_TOPIC_TYPE_NORMAL || topic.type == MQTTSN_TOPIC_TYPE_PREDEFINED) |
icraggs | 0:c524a894b5e8 | 84 | writeInt(&ptr, topic.data.id); |
icraggs | 0:c524a894b5e8 | 85 | else |
icraggs | 0:c524a894b5e8 | 86 | { |
icraggs | 0:c524a894b5e8 | 87 | writeChar(&ptr, topic.data.short_name[0]); |
icraggs | 0:c524a894b5e8 | 88 | writeChar(&ptr, topic.data.short_name[1]); |
icraggs | 0:c524a894b5e8 | 89 | } |
icraggs | 0:c524a894b5e8 | 90 | writeInt(&ptr, packetid); |
icraggs | 0:c524a894b5e8 | 91 | if (topic.type == MQTTSN_TOPIC_TYPE_NORMAL && qos == 3) |
icraggs | 0:c524a894b5e8 | 92 | { |
icraggs | 0:c524a894b5e8 | 93 | memcpy(ptr, topic.data.long_.name, topic.data.long_.len); |
icraggs | 0:c524a894b5e8 | 94 | ptr += topic.data.long_.len; |
icraggs | 0:c524a894b5e8 | 95 | } |
icraggs | 0:c524a894b5e8 | 96 | memcpy(ptr, payload, payloadlen); |
icraggs | 0:c524a894b5e8 | 97 | ptr += payloadlen; |
icraggs | 0:c524a894b5e8 | 98 | |
icraggs | 0:c524a894b5e8 | 99 | rc = ptr - buf; |
icraggs | 0:c524a894b5e8 | 100 | exit: |
icraggs | 0:c524a894b5e8 | 101 | FUNC_EXIT_RC(rc); |
icraggs | 0:c524a894b5e8 | 102 | return rc; |
icraggs | 0:c524a894b5e8 | 103 | } |
icraggs | 0:c524a894b5e8 | 104 | |
icraggs | 0:c524a894b5e8 | 105 | |
icraggs | 0:c524a894b5e8 | 106 | int MQTTSNSerialize_puback(unsigned char* buf, int buflen, unsigned short topicid, unsigned short packetid, |
icraggs | 0:c524a894b5e8 | 107 | unsigned char returncode) |
icraggs | 0:c524a894b5e8 | 108 | { |
icraggs | 0:c524a894b5e8 | 109 | unsigned char *ptr = buf; |
icraggs | 0:c524a894b5e8 | 110 | int len = 0; |
icraggs | 0:c524a894b5e8 | 111 | int rc = 0; |
icraggs | 0:c524a894b5e8 | 112 | |
icraggs | 0:c524a894b5e8 | 113 | FUNC_ENTRY; |
icraggs | 0:c524a894b5e8 | 114 | if ((len = MQTTSNPacket_len(6)) > buflen) |
icraggs | 0:c524a894b5e8 | 115 | { |
icraggs | 0:c524a894b5e8 | 116 | rc = MQTTSNPACKET_BUFFER_TOO_SHORT; |
icraggs | 0:c524a894b5e8 | 117 | goto exit; |
icraggs | 0:c524a894b5e8 | 118 | } |
icraggs | 0:c524a894b5e8 | 119 | ptr += MQTTSNPacket_encode(ptr, len); /* write length */ |
icraggs | 0:c524a894b5e8 | 120 | writeChar(&ptr, MQTTSN_PUBACK); /* write message type */ |
icraggs | 0:c524a894b5e8 | 121 | |
icraggs | 0:c524a894b5e8 | 122 | writeInt(&ptr, topicid); |
icraggs | 0:c524a894b5e8 | 123 | writeInt(&ptr, packetid); |
icraggs | 0:c524a894b5e8 | 124 | writeChar(&ptr, returncode); |
icraggs | 0:c524a894b5e8 | 125 | |
icraggs | 0:c524a894b5e8 | 126 | rc = ptr - buf; |
icraggs | 0:c524a894b5e8 | 127 | exit: |
icraggs | 0:c524a894b5e8 | 128 | FUNC_EXIT_RC(rc); |
icraggs | 0:c524a894b5e8 | 129 | return rc; |
icraggs | 0:c524a894b5e8 | 130 | |
icraggs | 0:c524a894b5e8 | 131 | } |
icraggs | 0:c524a894b5e8 | 132 | |
icraggs | 0:c524a894b5e8 | 133 | |
icraggs | 0:c524a894b5e8 | 134 | |
icraggs | 0:c524a894b5e8 | 135 | /** |
icraggs | 0:c524a894b5e8 | 136 | * Serializes the ack packet into the supplied buffer. |
icraggs | 0:c524a894b5e8 | 137 | * @param buf the buffer into which the packet will be serialized |
icraggs | 0:c524a894b5e8 | 138 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 0:c524a894b5e8 | 139 | * @param type the MQTT-SN packet type |
icraggs | 0:c524a894b5e8 | 140 | * @param packetid the MQTT-SN packet identifier |
icraggs | 0:c524a894b5e8 | 141 | * @return serialized length, or error if 0 |
icraggs | 0:c524a894b5e8 | 142 | */ |
icraggs | 0:c524a894b5e8 | 143 | int MQTTSNSerialize_ack(unsigned char* buf, int buflen, unsigned short packet_type, unsigned short packetid) |
icraggs | 0:c524a894b5e8 | 144 | { |
icraggs | 0:c524a894b5e8 | 145 | int rc = 0; |
icraggs | 0:c524a894b5e8 | 146 | unsigned char *ptr = buf; |
icraggs | 0:c524a894b5e8 | 147 | int len = 4; /* ack packet length */ |
icraggs | 0:c524a894b5e8 | 148 | |
icraggs | 0:c524a894b5e8 | 149 | FUNC_ENTRY; |
icraggs | 0:c524a894b5e8 | 150 | if (len > buflen) |
icraggs | 0:c524a894b5e8 | 151 | { |
icraggs | 0:c524a894b5e8 | 152 | rc = MQTTSNPACKET_BUFFER_TOO_SHORT; |
icraggs | 0:c524a894b5e8 | 153 | goto exit; |
icraggs | 0:c524a894b5e8 | 154 | } |
icraggs | 0:c524a894b5e8 | 155 | ptr += MQTTSNPacket_encode(ptr, len); /* write length */ |
icraggs | 0:c524a894b5e8 | 156 | writeChar(&ptr, packet_type); /* write packet type */ |
icraggs | 0:c524a894b5e8 | 157 | |
icraggs | 0:c524a894b5e8 | 158 | writeInt(&ptr, packetid); |
icraggs | 0:c524a894b5e8 | 159 | |
icraggs | 0:c524a894b5e8 | 160 | rc = ptr - buf; |
icraggs | 0:c524a894b5e8 | 161 | exit: |
icraggs | 0:c524a894b5e8 | 162 | FUNC_EXIT_RC(rc); |
icraggs | 0:c524a894b5e8 | 163 | return rc; |
icraggs | 0:c524a894b5e8 | 164 | } |
icraggs | 0:c524a894b5e8 | 165 | |
icraggs | 0:c524a894b5e8 | 166 | |
icraggs | 0:c524a894b5e8 | 167 | /** |
icraggs | 0:c524a894b5e8 | 168 | * Serializes a puback packet into the supplied buffer. |
icraggs | 0:c524a894b5e8 | 169 | * @param buf the buffer into which the packet will be serialized |
icraggs | 0:c524a894b5e8 | 170 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 0:c524a894b5e8 | 171 | * @param packetid integer - the MQTT packet identifier |
icraggs | 0:c524a894b5e8 | 172 | * @return serialized length, or error if 0 |
icraggs | 0:c524a894b5e8 | 173 | */ |
icraggs | 0:c524a894b5e8 | 174 | int MQTTSNSerialize_pubrec(unsigned char* buf, int buflen, unsigned short packetid) |
icraggs | 0:c524a894b5e8 | 175 | { |
icraggs | 0:c524a894b5e8 | 176 | return MQTTSNSerialize_ack(buf, buflen, MQTTSN_PUBREC, packetid); |
icraggs | 0:c524a894b5e8 | 177 | } |
icraggs | 0:c524a894b5e8 | 178 | |
icraggs | 0:c524a894b5e8 | 179 | |
icraggs | 0:c524a894b5e8 | 180 | /** |
icraggs | 0:c524a894b5e8 | 181 | * Serializes a pubrel packet into the supplied buffer. |
icraggs | 0:c524a894b5e8 | 182 | * @param buf the buffer into which the packet will be serialized |
icraggs | 0:c524a894b5e8 | 183 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 0:c524a894b5e8 | 184 | * @param dup integer - the MQTT dup flag |
icraggs | 0:c524a894b5e8 | 185 | * @param packetid integer - the MQTT packet identifier |
icraggs | 0:c524a894b5e8 | 186 | * @return serialized length, or error if 0 |
icraggs | 0:c524a894b5e8 | 187 | */ |
icraggs | 0:c524a894b5e8 | 188 | int MQTTSNSerialize_pubrel(unsigned char* buf, int buflen, unsigned short packetid) |
icraggs | 0:c524a894b5e8 | 189 | { |
icraggs | 0:c524a894b5e8 | 190 | return MQTTSNSerialize_ack(buf, buflen, MQTTSN_PUBREL, packetid); |
icraggs | 0:c524a894b5e8 | 191 | } |
icraggs | 0:c524a894b5e8 | 192 | |
icraggs | 0:c524a894b5e8 | 193 | |
icraggs | 0:c524a894b5e8 | 194 | /** |
icraggs | 0:c524a894b5e8 | 195 | * Serializes a pubrel packet into the supplied buffer. |
icraggs | 0:c524a894b5e8 | 196 | * @param buf the buffer into which the packet will be serialized |
icraggs | 0:c524a894b5e8 | 197 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 0:c524a894b5e8 | 198 | * @param packetid integer - the MQTT packet identifier |
icraggs | 0:c524a894b5e8 | 199 | * @return serialized length, or error if 0 |
icraggs | 0:c524a894b5e8 | 200 | */ |
icraggs | 0:c524a894b5e8 | 201 | int MQTTSNSerialize_pubcomp(unsigned char* buf, int buflen, unsigned short packetid) |
icraggs | 0:c524a894b5e8 | 202 | { |
icraggs | 0:c524a894b5e8 | 203 | return MQTTSNSerialize_ack(buf, buflen, MQTTSN_PUBCOMP, packetid); |
icraggs | 0:c524a894b5e8 | 204 | } |
icraggs | 0:c524a894b5e8 | 205 | |
icraggs | 0:c524a894b5e8 | 206 | |
icraggs | 0:c524a894b5e8 | 207 | /** |
icraggs | 0:c524a894b5e8 | 208 | * Determines the length of the MQTT register packet that would be produced using the supplied parameters |
icraggs | 0:c524a894b5e8 | 209 | * @param topicnamelen the length of the topic name to be used in the register |
icraggs | 0:c524a894b5e8 | 210 | * @return the length of buffer needed to contain the serialized version of the packet |
icraggs | 0:c524a894b5e8 | 211 | */ |
icraggs | 0:c524a894b5e8 | 212 | int MQTTSNSerialize_registerLength(int topicnamelen) |
icraggs | 0:c524a894b5e8 | 213 | { |
icraggs | 0:c524a894b5e8 | 214 | return topicnamelen + 5; |
icraggs | 0:c524a894b5e8 | 215 | } |
icraggs | 0:c524a894b5e8 | 216 | |
icraggs | 0:c524a894b5e8 | 217 | /** |
icraggs | 0:c524a894b5e8 | 218 | * Serializes the supplied register data into the supplied buffer, ready for sending |
icraggs | 0:c524a894b5e8 | 219 | * @param buf the buffer into which the packet will be serialized |
icraggs | 0:c524a894b5e8 | 220 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 0:c524a894b5e8 | 221 | * @param topicid if sent by a gateway, contains the id for the topicname, otherwise 0 |
icraggs | 0:c524a894b5e8 | 222 | * @param packetid integer - the MQTT packet identifier |
icraggs | 0:c524a894b5e8 | 223 | * @param topicname null-terminated topic name string |
icraggs | 0:c524a894b5e8 | 224 | * @return the length of the serialized data. <= 0 indicates error |
icraggs | 0:c524a894b5e8 | 225 | */ |
icraggs | 0:c524a894b5e8 | 226 | int MQTTSNSerialize_register(unsigned char* buf, int buflen, unsigned short topicid, unsigned short packetid, |
icraggs | 0:c524a894b5e8 | 227 | MQTTSNString* topicname) |
icraggs | 0:c524a894b5e8 | 228 | { |
icraggs | 0:c524a894b5e8 | 229 | unsigned char *ptr = buf; |
icraggs | 0:c524a894b5e8 | 230 | int len = 0; |
icraggs | 0:c524a894b5e8 | 231 | int rc = 0; |
icraggs | 0:c524a894b5e8 | 232 | int topicnamelen = 0; |
icraggs | 0:c524a894b5e8 | 233 | |
icraggs | 0:c524a894b5e8 | 234 | FUNC_ENTRY; |
icraggs | 0:c524a894b5e8 | 235 | topicnamelen = (topicname->cstring) ? strlen(topicname->cstring) : topicname->lenstring.len; |
icraggs | 0:c524a894b5e8 | 236 | if ((len = MQTTSNPacket_len(MQTTSNSerialize_registerLength(topicnamelen))) > buflen) |
icraggs | 0:c524a894b5e8 | 237 | { |
icraggs | 0:c524a894b5e8 | 238 | rc = MQTTSNPACKET_BUFFER_TOO_SHORT; |
icraggs | 0:c524a894b5e8 | 239 | goto exit; |
icraggs | 0:c524a894b5e8 | 240 | } |
icraggs | 0:c524a894b5e8 | 241 | ptr += MQTTSNPacket_encode(ptr, len); /* write length */ |
icraggs | 0:c524a894b5e8 | 242 | writeChar(&ptr, MQTTSN_REGISTER); /* write message type */ |
icraggs | 0:c524a894b5e8 | 243 | |
icraggs | 0:c524a894b5e8 | 244 | writeInt(&ptr, topicid); |
icraggs | 0:c524a894b5e8 | 245 | writeInt(&ptr, packetid); |
icraggs | 0:c524a894b5e8 | 246 | |
icraggs | 0:c524a894b5e8 | 247 | memcpy(ptr, (topicname->cstring) ? topicname->cstring : topicname->lenstring.data, topicnamelen); |
icraggs | 0:c524a894b5e8 | 248 | ptr += topicnamelen; |
icraggs | 0:c524a894b5e8 | 249 | |
icraggs | 0:c524a894b5e8 | 250 | rc = ptr - buf; |
icraggs | 0:c524a894b5e8 | 251 | exit: |
icraggs | 0:c524a894b5e8 | 252 | FUNC_EXIT_RC(rc); |
icraggs | 0:c524a894b5e8 | 253 | return rc; |
icraggs | 0:c524a894b5e8 | 254 | } |
icraggs | 0:c524a894b5e8 | 255 | |
icraggs | 0:c524a894b5e8 | 256 | |
icraggs | 0:c524a894b5e8 | 257 | /** |
icraggs | 0:c524a894b5e8 | 258 | * Serializes the supplied register data into the supplied buffer, ready for sending |
icraggs | 0:c524a894b5e8 | 259 | * @param buf the buffer into which the packet will be serialized |
icraggs | 0:c524a894b5e8 | 260 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 0:c524a894b5e8 | 261 | * @param topicid if sent by a gateway, contains the id for the topicname, otherwise 0 |
icraggs | 0:c524a894b5e8 | 262 | * @param packetid integer - the MQTT packet identifier |
icraggs | 0:c524a894b5e8 | 263 | * @param return_code integer return code |
icraggs | 0:c524a894b5e8 | 264 | * @return the length of the serialized data. <= 0 indicates error |
icraggs | 0:c524a894b5e8 | 265 | */ |
icraggs | 0:c524a894b5e8 | 266 | int MQTTSNSerialize_regack(unsigned char* buf, int buflen, unsigned short topicid, unsigned short packetid, |
icraggs | 0:c524a894b5e8 | 267 | unsigned char return_code) |
icraggs | 0:c524a894b5e8 | 268 | { |
icraggs | 0:c524a894b5e8 | 269 | unsigned char *ptr = buf; |
icraggs | 0:c524a894b5e8 | 270 | int len = 0; |
icraggs | 0:c524a894b5e8 | 271 | int rc = 0; |
icraggs | 0:c524a894b5e8 | 272 | |
icraggs | 0:c524a894b5e8 | 273 | FUNC_ENTRY; |
icraggs | 0:c524a894b5e8 | 274 | if ((len = MQTTSNPacket_len(6)) > buflen) |
icraggs | 0:c524a894b5e8 | 275 | { |
icraggs | 0:c524a894b5e8 | 276 | rc = MQTTSNPACKET_BUFFER_TOO_SHORT; |
icraggs | 0:c524a894b5e8 | 277 | goto exit; |
icraggs | 0:c524a894b5e8 | 278 | } |
icraggs | 0:c524a894b5e8 | 279 | ptr += MQTTSNPacket_encode(ptr, len); /* write length */ |
icraggs | 0:c524a894b5e8 | 280 | writeChar(&ptr, MQTTSN_REGACK); /* write message type */ |
icraggs | 0:c524a894b5e8 | 281 | |
icraggs | 0:c524a894b5e8 | 282 | writeInt(&ptr, topicid); |
icraggs | 0:c524a894b5e8 | 283 | writeInt(&ptr, packetid); |
icraggs | 0:c524a894b5e8 | 284 | writeChar(&ptr, return_code); |
icraggs | 0:c524a894b5e8 | 285 | |
icraggs | 0:c524a894b5e8 | 286 | rc = ptr - buf; |
icraggs | 0:c524a894b5e8 | 287 | exit: |
icraggs | 0:c524a894b5e8 | 288 | FUNC_EXIT_RC(rc); |
icraggs | 0:c524a894b5e8 | 289 | return rc; |
icraggs | 0:c524a894b5e8 | 290 | } |
icraggs | 0:c524a894b5e8 | 291 |