123
MQTTSNSearchServer.c@1:7fa362fa563f, 2016-01-06 (annotated)
- Committer:
- icraggs
- Date:
- Wed Jan 06 14:19:27 2016 +0000
- Revision:
- 1:7fa362fa563f
- Parent:
- 0:c524a894b5e8
Internal function name changes to avoid name clashes
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
icraggs | 1:7fa362fa563f | 1 | /******************************************************************************* |
icraggs | 1:7fa362fa563f | 2 | * Copyright (c) 2014 IBM Corp. |
icraggs | 1:7fa362fa563f | 3 | * |
icraggs | 1:7fa362fa563f | 4 | * All rights reserved. This program and the accompanying materials |
icraggs | 1:7fa362fa563f | 5 | * are made available under the terms of the Eclipse Public License v1.0 |
icraggs | 1:7fa362fa563f | 6 | * and Eclipse Distribution License v1.0 which accompany this distribution. |
icraggs | 1:7fa362fa563f | 7 | * |
icraggs | 1:7fa362fa563f | 8 | * The Eclipse Public License is available at |
icraggs | 1:7fa362fa563f | 9 | * http://www.eclipse.org/legal/epl-v10.html |
icraggs | 1:7fa362fa563f | 10 | * and the Eclipse Distribution License is available at |
icraggs | 1:7fa362fa563f | 11 | * http://www.eclipse.org/org/documents/edl-v10.php. |
icraggs | 1:7fa362fa563f | 12 | * |
icraggs | 1:7fa362fa563f | 13 | * Contributors: |
icraggs | 1:7fa362fa563f | 14 | * Ian Craggs - initial API and implementation and/or initial documentation |
icraggs | 1:7fa362fa563f | 15 | *******************************************************************************/ |
icraggs | 1:7fa362fa563f | 16 | |
icraggs | 1:7fa362fa563f | 17 | #include "MQTTSNPacket.h" |
icraggs | 1:7fa362fa563f | 18 | #include "StackTrace.h" |
icraggs | 1:7fa362fa563f | 19 | |
icraggs | 1:7fa362fa563f | 20 | #include <string.h> |
icraggs | 1:7fa362fa563f | 21 | |
icraggs | 1:7fa362fa563f | 22 | |
icraggs | 1:7fa362fa563f | 23 | /** |
icraggs | 1:7fa362fa563f | 24 | * Serializes the supplied advertise data into the supplied buffer, ready for sending |
icraggs | 1:7fa362fa563f | 25 | * @param buf the buffer into which the packet will be serialized |
icraggs | 1:7fa362fa563f | 26 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 1:7fa362fa563f | 27 | * @param radius the broadcast radius of this message |
icraggs | 1:7fa362fa563f | 28 | * @param duration - the time interval until the next advertise will be sent |
icraggs | 1:7fa362fa563f | 29 | * @return the length of the serialized data. <= 0 indicates error |
icraggs | 1:7fa362fa563f | 30 | */ |
icraggs | 1:7fa362fa563f | 31 | int MQTTSNSerialize_advertise(unsigned char* buf, int buflen, unsigned char gatewayid, unsigned short duration) |
icraggs | 1:7fa362fa563f | 32 | { |
icraggs | 1:7fa362fa563f | 33 | unsigned char *ptr = buf; |
icraggs | 1:7fa362fa563f | 34 | int len = 0; |
icraggs | 1:7fa362fa563f | 35 | int rc = 0; |
icraggs | 1:7fa362fa563f | 36 | |
icraggs | 1:7fa362fa563f | 37 | FUNC_ENTRY; |
icraggs | 1:7fa362fa563f | 38 | if ((len = MQTTSNPacket_len(4)) > buflen) |
icraggs | 1:7fa362fa563f | 39 | { |
icraggs | 1:7fa362fa563f | 40 | rc = MQTTSNPACKET_BUFFER_TOO_SHORT; |
icraggs | 1:7fa362fa563f | 41 | goto exit; |
icraggs | 1:7fa362fa563f | 42 | } |
icraggs | 1:7fa362fa563f | 43 | ptr += MQTTSNPacket_encode(ptr, len); /* write length */ |
icraggs | 1:7fa362fa563f | 44 | MQTTSNPacket_writeChar(&ptr, MQTTSN_ADVERTISE); /* write message type */ |
icraggs | 1:7fa362fa563f | 45 | |
icraggs | 1:7fa362fa563f | 46 | MQTTSNPacket_writeChar(&ptr, gatewayid); |
icraggs | 1:7fa362fa563f | 47 | MQTTSNPacket_writeInt(&ptr, duration); |
icraggs | 1:7fa362fa563f | 48 | |
icraggs | 1:7fa362fa563f | 49 | rc = ptr - buf; |
icraggs | 1:7fa362fa563f | 50 | exit: |
icraggs | 1:7fa362fa563f | 51 | FUNC_EXIT_RC(rc); |
icraggs | 1:7fa362fa563f | 52 | return rc; |
icraggs | 1:7fa362fa563f | 53 | } |
icraggs | 1:7fa362fa563f | 54 | |
icraggs | 0:c524a894b5e8 | 55 | |
icraggs | 1:7fa362fa563f | 56 | /** |
icraggs | 1:7fa362fa563f | 57 | * Deserializes the supplied (wire) buffer into searchgw data |
icraggs | 1:7fa362fa563f | 58 | * @param radius the returned broadcast radius of this message |
icraggs | 1:7fa362fa563f | 59 | * @param buf the raw buffer data, of the correct length determined by the remaining length field |
icraggs | 1:7fa362fa563f | 60 | * @param buflen the length in bytes of the data in the supplied buffer |
icraggs | 1:7fa362fa563f | 61 | * @return error code. 1 is success |
icraggs | 1:7fa362fa563f | 62 | */ |
icraggs | 1:7fa362fa563f | 63 | int MQTTSNDeserialize_searchgw(unsigned char* radius, unsigned char* buf, int buflen) |
icraggs | 1:7fa362fa563f | 64 | { |
icraggs | 1:7fa362fa563f | 65 | unsigned char* curdata = buf; |
icraggs | 1:7fa362fa563f | 66 | unsigned char* enddata = NULL; |
icraggs | 1:7fa362fa563f | 67 | int rc = 0; |
icraggs | 1:7fa362fa563f | 68 | int mylen = 0; |
icraggs | 1:7fa362fa563f | 69 | |
icraggs | 1:7fa362fa563f | 70 | FUNC_ENTRY; |
icraggs | 1:7fa362fa563f | 71 | curdata += (rc = MQTTSNPacket_decode(curdata, buflen, &mylen)); /* read length */ |
icraggs | 1:7fa362fa563f | 72 | enddata = buf + mylen; |
icraggs | 1:7fa362fa563f | 73 | if (enddata - curdata > buflen) |
icraggs | 1:7fa362fa563f | 74 | goto exit; |
icraggs | 1:7fa362fa563f | 75 | |
icraggs | 1:7fa362fa563f | 76 | if (MQTTSNPacket_readChar(&curdata) != MQTTSN_SEARCHGW) |
icraggs | 1:7fa362fa563f | 77 | goto exit; |
icraggs | 1:7fa362fa563f | 78 | |
icraggs | 1:7fa362fa563f | 79 | *radius = MQTTSNPacket_readChar(&curdata); |
icraggs | 1:7fa362fa563f | 80 | |
icraggs | 1:7fa362fa563f | 81 | rc = 1; |
icraggs | 1:7fa362fa563f | 82 | exit: |
icraggs | 1:7fa362fa563f | 83 | FUNC_EXIT_RC(rc); |
icraggs | 1:7fa362fa563f | 84 | return rc; |
icraggs | 1:7fa362fa563f | 85 | } |
icraggs | 1:7fa362fa563f | 86 | |
icraggs | 1:7fa362fa563f | 87 | |
icraggs | 1:7fa362fa563f | 88 | /** |
icraggs | 1:7fa362fa563f | 89 | * Serializes the supplied gwinfo data into the supplied buffer, ready for sending |
icraggs | 1:7fa362fa563f | 90 | * @param buf the buffer into which the packet will be serialized |
icraggs | 1:7fa362fa563f | 91 | * @param buflen the length in bytes of the supplied buffer |
icraggs | 1:7fa362fa563f | 92 | * @param gatewayid the gateway id |
icraggs | 1:7fa362fa563f | 93 | * @param gatewayaddress_len the optional length of the gateway address (0 if none) |
icraggs | 1:7fa362fa563f | 94 | * @param gatewayaddress the optional gateway address (NULL if none) |
icraggs | 1:7fa362fa563f | 95 | * @return the length of the serialized data. <= 0 indicates error |
icraggs | 1:7fa362fa563f | 96 | */ |
icraggs | 1:7fa362fa563f | 97 | int MQTTSNSerialize_gwinfo(unsigned char* buf, int buflen, unsigned char gatewayid, unsigned short gatewayaddress_len, |
icraggs | 1:7fa362fa563f | 98 | unsigned char* gatewayaddress) |
icraggs | 1:7fa362fa563f | 99 | { |
icraggs | 1:7fa362fa563f | 100 | unsigned char *ptr = buf; |
icraggs | 1:7fa362fa563f | 101 | int len = 0; |
icraggs | 1:7fa362fa563f | 102 | int rc = 0; |
icraggs | 1:7fa362fa563f | 103 | |
icraggs | 1:7fa362fa563f | 104 | FUNC_ENTRY; |
icraggs | 1:7fa362fa563f | 105 | if ((len = MQTTSNPacket_len(2 + gatewayaddress_len)) > buflen) |
icraggs | 1:7fa362fa563f | 106 | { |
icraggs | 1:7fa362fa563f | 107 | rc = MQTTSNPACKET_BUFFER_TOO_SHORT; |
icraggs | 1:7fa362fa563f | 108 | goto exit; |
icraggs | 1:7fa362fa563f | 109 | } |
icraggs | 1:7fa362fa563f | 110 | ptr += MQTTSNPacket_encode(ptr, len); /* write length */ |
icraggs | 1:7fa362fa563f | 111 | MQTTSNPacket_writeChar(&ptr, MQTTSN_GWINFO); /* write message type */ |
icraggs | 1:7fa362fa563f | 112 | |
icraggs | 1:7fa362fa563f | 113 | MQTTSNPacket_writeChar(&ptr, gatewayid); |
icraggs | 1:7fa362fa563f | 114 | if (gatewayaddress_len > 0 && gatewayaddress != NULL) |
icraggs | 1:7fa362fa563f | 115 | { |
icraggs | 1:7fa362fa563f | 116 | memcpy(ptr, gatewayaddress, gatewayaddress_len); |
icraggs | 1:7fa362fa563f | 117 | ptr += gatewayaddress_len; |
icraggs | 1:7fa362fa563f | 118 | } |
icraggs | 1:7fa362fa563f | 119 | |
icraggs | 1:7fa362fa563f | 120 | rc = ptr - buf; |
icraggs | 1:7fa362fa563f | 121 | exit: |
icraggs | 1:7fa362fa563f | 122 | FUNC_EXIT_RC(rc); |
icraggs | 1:7fa362fa563f | 123 | return rc; |
icraggs | 1:7fa362fa563f | 124 | |
icraggs | 1:7fa362fa563f | 125 | } |
icraggs | 1:7fa362fa563f | 126 | |
icraggs | 1:7fa362fa563f | 127 | |
icraggs | 1:7fa362fa563f | 128 | |
icraggs | 1:7fa362fa563f | 129 |