service/protocol-plugin/plugins/mqtt-light/lib/send_client_mosq.c

   1 /*
   2 Copyright (c) 2009-2013 Roger Light <roger@atchoo.org>
   3 All rights reserved.
   4
   5 Redistribution and use in source and binary forms, with or without
   6 modification, are permitted provided that the following conditions are met:
   7
   8 1. Redistributions of source code must retain the above copyright notice,
   9    this list of conditions and the following disclaimer.
  10 2. Redistributions in binary form must reproduce the above copyright
  11    notice, this list of conditions and the following disclaimer in the
  12    documentation and/or other materials provided with the distribution.
  13 3. Neither the name of mosquitto nor the names of its
  14    contributors may be used to endorse or promote products derived from
  15    this software without specific prior written permission.
  16
  17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  21 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27 POSSIBILITY OF SUCH DAMAGE.
  28 */
  29
  30 #include <assert.h>
  31 #include <string.h>
  32
  33 #include "mosquitto.h"
  34 #include "logging_mosq.h"
  35 #include "memory_mosq.h"
  36 #include "mqtt3_protocol.h"
  37 #include "net_mosq.h"
  38 #include "send_mosq.h"
  39 #include "util_mosq.h"
  40
  41 #ifdef WITH_BROKER
  42 #include "mosquitto_broker.h"
  43 #endif
  44
  45 int _mosquitto_send_connect(struct mosquitto *mosq, uint16_t keepalive, bool clean_session)
  46 {
  47         struct _mosquitto_packet *packet = NULL;
  48         int payloadlen;
  49         uint8_t will = 0;
  50         uint8_t byte;
  51         int rc;
  52         uint8_t version = PROTOCOL_VERSION_v31;
  53
  54         assert(mosq);
  55         assert(mosq->id);
  56
  57         packet = _mosquitto_calloc(1, sizeof(struct _mosquitto_packet));
  58         if(!packet) return MOSQ_ERR_NOMEM;
  59
  60         payloadlen = 2+strlen(mosq->id);
  61         if(mosq->will){
  62                 will = 1;
  63                 assert(mosq->will->topic);
  64
  65                 payloadlen += 2+strlen(mosq->will->topic) + 2+mosq->will->payloadlen;
  66         }
  67         if(mosq->username){
  68                 payloadlen += 2+strlen(mosq->username);
  69                 if(mosq->password){
  70                         payloadlen += 2+strlen(mosq->password);
  71                 }
  72         }
  73
  74         packet->command = CONNECT;
  75         packet->remaining_length = 12+payloadlen;
  76         rc = _mosquitto_packet_alloc(packet);
  77         if(rc){
  78                 _mosquitto_free(packet);
  79                 return rc;
  80         }
  81
  82         /* Variable header */
  83         _mosquitto_write_string(packet, PROTOCOL_NAME_v31, strlen(PROTOCOL_NAME_v31));
  84 #if defined(WITH_BROKER) && defined(WITH_BRIDGE)
  85         if(mosq->bridge && mosq->bridge->try_private && mosq->bridge->try_private_accepted){
  86                 version |= 0x80;
  87         }else{
  88         }
  89 #endif
  90         _mosquitto_write_byte(packet, version);
  91         byte = (clean_session&0x1)<<1;
  92         if(will){
  93                 byte = byte | ((mosq->will->retain&0x1)<<5) | ((mosq->will->qos&0x3)<<3) | ((will&0x1)<<2);
  94         }
  95         if(mosq->username){
  96                 byte = byte | 0x1<<7;
  97                 if(mosq->password){
  98                         byte = byte | 0x1<<6;
  99                 }
 100         }
 101         _mosquitto_write_byte(packet, byte);
 102         _mosquitto_write_uint16(packet, keepalive);
 103
 104         /* Payload */
 105         _mosquitto_write_string(packet, mosq->id, strlen(mosq->id));
 106         if(will){
 107                 _mosquitto_write_string(packet, mosq->will->topic, strlen(mosq->will->topic));
 108                 _mosquitto_write_string(packet, (const char *)mosq->will->payload, mosq->will->payloadlen);
 109         }
 110         if(mosq->username){
 111                 _mosquitto_write_string(packet, mosq->username, strlen(mosq->username));
 112                 if(mosq->password){
 113                         _mosquitto_write_string(packet, mosq->password, strlen(mosq->password));
 114                 }
 115         }
 116
 117         mosq->keepalive = keepalive;
 118 #ifdef WITH_BROKER
 119 # ifdef WITH_BRIDGE
 120         _mosquitto_log_printf(mosq, MOSQ_LOG_DEBUG, "Bridge %s sending CONNECT", mosq->id);
 121 # endif
 122 #else
 123         _mosquitto_log_printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending CONNECT", mosq->id);
 124 #endif
 125         return _mosquitto_packet_queue(mosq, packet);
 126 }
 127
 128 int _mosquitto_send_disconnect(struct mosquitto *mosq)
 129 {
 130         assert(mosq);
 131 #ifdef WITH_BROKER
 132 # ifdef WITH_BRIDGE
 133         _mosquitto_log_printf(mosq, MOSQ_LOG_DEBUG, "Bridge %s sending DISCONNECT", mosq->id);
 134 # endif
 135 #else
 136         _mosquitto_log_printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending DISCONNECT", mosq->id);
 137 #endif
 138         return _mosquitto_send_simple_command(mosq, DISCONNECT);
 139 }
 140
 141 int _mosquitto_send_subscribe(struct mosquitto *mosq, int *mid, bool dup, const char *topic, uint8_t topic_qos)
 142 {
 143         /* FIXME - only deals with a single topic */
 144         struct _mosquitto_packet *packet = NULL;
 145         uint32_t packetlen;
 146         uint16_t local_mid;
 147         int rc;
 148
 149         assert(mosq);
 150         assert(topic);
 151
 152         packet = _mosquitto_calloc(1, sizeof(struct _mosquitto_packet));
 153         if(!packet) return MOSQ_ERR_NOMEM;
 154
 155         packetlen = 2 + 2+strlen(topic) + 1;
 156
 157         packet->command = SUBSCRIBE | (dup<<3) | (1<<1);
 158         packet->remaining_length = packetlen;
 159         rc = _mosquitto_packet_alloc(packet);
 160         if(rc){
 161                 _mosquitto_free(packet);
 162                 return rc;
 163         }
 164
 165         /* Variable header */
 166         local_mid = _mosquitto_mid_generate(mosq);
 167         if(mid) *mid = (int)local_mid;
 168         _mosquitto_write_uint16(packet, local_mid);
 169
 170         /* Payload */
 171         _mosquitto_write_string(packet, topic, strlen(topic));
 172         _mosquitto_write_byte(packet, topic_qos);
 173
 174 #ifdef WITH_BROKER
 175 # ifdef WITH_BRIDGE
 176         _mosquitto_log_printf(mosq, MOSQ_LOG_DEBUG, "Bridge %s sending SUBSCRIBE (Mid: %d, Topic: %s, QoS: %d)", mosq->id, local_mid, topic, topic_qos);
 177 # endif
 178 #else
 179         _mosquitto_log_printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending SUBSCRIBE (Mid: %d, Topic: %s, QoS: %d)", mosq->id, local_mid, topic, topic_qos);
 180 #endif
 181
 182         return _mosquitto_packet_queue(mosq, packet);
 183 }
 184
 185
 186 int _mosquitto_send_unsubscribe(struct mosquitto *mosq, int *mid, bool dup, const char *topic)
 187 {
 188         /* FIXME - only deals with a single topic */
 189         struct _mosquitto_packet *packet = NULL;
 190         uint32_t packetlen;
 191         uint16_t local_mid;
 192         int rc;
 193
 194         assert(mosq);
 195         assert(topic);
 196
 197         packet = _mosquitto_calloc(1, sizeof(struct _mosquitto_packet));
 198         if(!packet) return MOSQ_ERR_NOMEM;
 199
 200         packetlen = 2 + 2+strlen(topic);
 201
 202         packet->command = UNSUBSCRIBE | (dup<<3) | (1<<1);
 203         packet->remaining_length = packetlen;
 204         rc = _mosquitto_packet_alloc(packet);
 205         if(rc){
 206                 _mosquitto_free(packet);
 207                 return rc;
 208         }
 209
 210         /* Variable header */
 211         local_mid = _mosquitto_mid_generate(mosq);
 212         if(mid) *mid = (int)local_mid;
 213         _mosquitto_write_uint16(packet, local_mid);
 214
 215         /* Payload */
 216         _mosquitto_write_string(packet, topic, strlen(topic));
 217
 218 #ifdef WITH_BROKER
 219 # ifdef WITH_BRIDGE
 220         _mosquitto_log_printf(mosq, MOSQ_LOG_DEBUG, "Bridge %s sending UNSUBSCRIBE (Mid: %d, Topic: %s)", mosq->id, local_mid, topic);
 221 # endif
 222 #else
 223         _mosquitto_log_printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending UNSUBSCRIBE (Mid: %d, Topic: %s)", mosq->id, local_mid, topic);
 224 #endif
 225         return _mosquitto_packet_queue(mosq, packet);
 226 }
 227