Arch GPRS MQTT demo
Dependencies: GPRSInterface USBDevice mbed
Fork of Seeed_HTTPClient_GPRSInterface_HelloWorld by
PubSubClient/PubSubClient.cpp@3:9dc67659d945, 2015-04-03 (annotated)
- Committer:
- yihui
- Date:
- Fri Apr 03 08:29:43 2015 +0000
- Revision:
- 3:9dc67659d945
Arch GPRS MQTT demo
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
yihui | 3:9dc67659d945 | 1 | /* |
yihui | 3:9dc67659d945 | 2 | PubSubClient.cpp - A simple client for MQTT. |
yihui | 3:9dc67659d945 | 3 | Nicholas O'Leary |
yihui | 3:9dc67659d945 | 4 | http://knolleary.net |
yihui | 3:9dc67659d945 | 5 | |
yihui | 3:9dc67659d945 | 6 | initial port for mbed |
yihui | 3:9dc67659d945 | 7 | Joerg Wende |
yihui | 3:9dc67659d945 | 8 | https://twitter.com/joerg_wende |
yihui | 3:9dc67659d945 | 9 | */ |
yihui | 3:9dc67659d945 | 10 | |
yihui | 3:9dc67659d945 | 11 | |
yihui | 3:9dc67659d945 | 12 | |
yihui | 3:9dc67659d945 | 13 | #include "PubSubClient.h" |
yihui | 3:9dc67659d945 | 14 | |
yihui | 3:9dc67659d945 | 15 | #include "USBSerial.h" |
yihui | 3:9dc67659d945 | 16 | |
yihui | 3:9dc67659d945 | 17 | extern USBSerial pc; |
yihui | 3:9dc67659d945 | 18 | |
yihui | 3:9dc67659d945 | 19 | #define LOG(args...) pc.printf(args) |
yihui | 3:9dc67659d945 | 20 | |
yihui | 3:9dc67659d945 | 21 | Timer t; |
yihui | 3:9dc67659d945 | 22 | |
yihui | 3:9dc67659d945 | 23 | int millis() |
yihui | 3:9dc67659d945 | 24 | { |
yihui | 3:9dc67659d945 | 25 | return t.read_ms(); |
yihui | 3:9dc67659d945 | 26 | } |
yihui | 3:9dc67659d945 | 27 | |
yihui | 3:9dc67659d945 | 28 | PubSubClient::PubSubClient() |
yihui | 3:9dc67659d945 | 29 | { |
yihui | 3:9dc67659d945 | 30 | } |
yihui | 3:9dc67659d945 | 31 | |
yihui | 3:9dc67659d945 | 32 | PubSubClient::PubSubClient(char *ip, int port, void (*callback)(char*,char*,unsigned int)) |
yihui | 3:9dc67659d945 | 33 | { |
yihui | 3:9dc67659d945 | 34 | this->callback = callback; |
yihui | 3:9dc67659d945 | 35 | this->ip = ip; |
yihui | 3:9dc67659d945 | 36 | this->port = port; |
yihui | 3:9dc67659d945 | 37 | t.start(); |
yihui | 3:9dc67659d945 | 38 | } |
yihui | 3:9dc67659d945 | 39 | |
yihui | 3:9dc67659d945 | 40 | |
yihui | 3:9dc67659d945 | 41 | bool PubSubClient::connect(char *id) |
yihui | 3:9dc67659d945 | 42 | { |
yihui | 3:9dc67659d945 | 43 | return connect(id,NULL,NULL,0,0,0,0); |
yihui | 3:9dc67659d945 | 44 | } |
yihui | 3:9dc67659d945 | 45 | |
yihui | 3:9dc67659d945 | 46 | bool PubSubClient::connect(char *id, char *user, char *pass) |
yihui | 3:9dc67659d945 | 47 | { |
yihui | 3:9dc67659d945 | 48 | return connect(id,user,pass,0,0,0,0); |
yihui | 3:9dc67659d945 | 49 | } |
yihui | 3:9dc67659d945 | 50 | |
yihui | 3:9dc67659d945 | 51 | bool PubSubClient::connect(char *id, char* willTopic, short willQos, short willRetain, char* willMessage) |
yihui | 3:9dc67659d945 | 52 | { |
yihui | 3:9dc67659d945 | 53 | return connect(id,NULL,NULL,willTopic,willQos,willRetain,willMessage); |
yihui | 3:9dc67659d945 | 54 | } |
yihui | 3:9dc67659d945 | 55 | |
yihui | 3:9dc67659d945 | 56 | bool PubSubClient::connect(char *id, char *user, char *pass, char* willTopic, short willQos, short willRetain, char* willMessage) |
yihui | 3:9dc67659d945 | 57 | { |
yihui | 3:9dc67659d945 | 58 | if (!connected()) { |
yihui | 3:9dc67659d945 | 59 | int result = 0; |
yihui | 3:9dc67659d945 | 60 | result = _client.connect(this->ip, this->port); |
yihui | 3:9dc67659d945 | 61 | _client.set_blocking(false, 1); |
yihui | 3:9dc67659d945 | 62 | LOG("IP: %s\r\n",this->ip); |
yihui | 3:9dc67659d945 | 63 | LOG("Port: %i\r\n",this->port); |
yihui | 3:9dc67659d945 | 64 | LOG("Result: %i \r\n", result); |
yihui | 3:9dc67659d945 | 65 | |
yihui | 3:9dc67659d945 | 66 | if (result==0) { |
yihui | 3:9dc67659d945 | 67 | nextMsgId = 1; |
yihui | 3:9dc67659d945 | 68 | char d[9] = {0x00,0x06,'M','Q','I','s','d','p',MQTTPROTOCOLVERSION}; |
yihui | 3:9dc67659d945 | 69 | // Leave room in the buffer for header and variable length field |
yihui | 3:9dc67659d945 | 70 | int length = 5; |
yihui | 3:9dc67659d945 | 71 | unsigned int j; |
yihui | 3:9dc67659d945 | 72 | for (j = 0; j<9; j++) { |
yihui | 3:9dc67659d945 | 73 | buffer[length++] = d[j]; |
yihui | 3:9dc67659d945 | 74 | } |
yihui | 3:9dc67659d945 | 75 | |
yihui | 3:9dc67659d945 | 76 | char v; |
yihui | 3:9dc67659d945 | 77 | if (willTopic) { |
yihui | 3:9dc67659d945 | 78 | v = 0x06|(willQos<<3)|(willRetain<<5); |
yihui | 3:9dc67659d945 | 79 | } else { |
yihui | 3:9dc67659d945 | 80 | v = 0x02; |
yihui | 3:9dc67659d945 | 81 | } |
yihui | 3:9dc67659d945 | 82 | |
yihui | 3:9dc67659d945 | 83 | if(user != NULL) { |
yihui | 3:9dc67659d945 | 84 | v = v|0x80; |
yihui | 3:9dc67659d945 | 85 | |
yihui | 3:9dc67659d945 | 86 | if(pass != NULL) { |
yihui | 3:9dc67659d945 | 87 | v = v|(0x80>>1); |
yihui | 3:9dc67659d945 | 88 | } |
yihui | 3:9dc67659d945 | 89 | } |
yihui | 3:9dc67659d945 | 90 | |
yihui | 3:9dc67659d945 | 91 | buffer[length++] = v; |
yihui | 3:9dc67659d945 | 92 | |
yihui | 3:9dc67659d945 | 93 | buffer[length++] = ((MQTT_KEEPALIVE) >> 8); |
yihui | 3:9dc67659d945 | 94 | buffer[length++] = ((MQTT_KEEPALIVE) & 0xFF); |
yihui | 3:9dc67659d945 | 95 | length = writeString(id,buffer,length); |
yihui | 3:9dc67659d945 | 96 | if (willTopic) { |
yihui | 3:9dc67659d945 | 97 | length = writeString(willTopic,buffer,length); |
yihui | 3:9dc67659d945 | 98 | length = writeString(willMessage,buffer,length); |
yihui | 3:9dc67659d945 | 99 | } |
yihui | 3:9dc67659d945 | 100 | |
yihui | 3:9dc67659d945 | 101 | if(user != NULL) { |
yihui | 3:9dc67659d945 | 102 | length = writeString(user,buffer,length); |
yihui | 3:9dc67659d945 | 103 | if(pass != NULL) { |
yihui | 3:9dc67659d945 | 104 | length = writeString(pass,buffer,length); |
yihui | 3:9dc67659d945 | 105 | } |
yihui | 3:9dc67659d945 | 106 | } |
yihui | 3:9dc67659d945 | 107 | LOG("Before MQTT Connect ... \r\n"); |
yihui | 3:9dc67659d945 | 108 | write(MQTTCONNECT,buffer,length-5); |
yihui | 3:9dc67659d945 | 109 | |
yihui | 3:9dc67659d945 | 110 | lastInActivity = lastOutActivity = millis(); |
yihui | 3:9dc67659d945 | 111 | |
yihui | 3:9dc67659d945 | 112 | int llen=128; |
yihui | 3:9dc67659d945 | 113 | int len =0; |
yihui | 3:9dc67659d945 | 114 | |
yihui | 3:9dc67659d945 | 115 | while ((len=readPacket(llen))==0) { |
yihui | 3:9dc67659d945 | 116 | unsigned long t = millis(); |
yihui | 3:9dc67659d945 | 117 | if (t-lastInActivity > MQTT_KEEPALIVE*1000UL) { |
yihui | 3:9dc67659d945 | 118 | _client.close(); |
yihui | 3:9dc67659d945 | 119 | return false; |
yihui | 3:9dc67659d945 | 120 | } |
yihui | 3:9dc67659d945 | 121 | } |
yihui | 3:9dc67659d945 | 122 | LOG("after MQTT Connect ... %i\r\n", len); |
yihui | 3:9dc67659d945 | 123 | if (len == 4 && buffer[3] == 0) { |
yihui | 3:9dc67659d945 | 124 | lastInActivity = millis(); |
yihui | 3:9dc67659d945 | 125 | pingOutstanding = false; |
yihui | 3:9dc67659d945 | 126 | return true; |
yihui | 3:9dc67659d945 | 127 | } |
yihui | 3:9dc67659d945 | 128 | } |
yihui | 3:9dc67659d945 | 129 | _client.close(); |
yihui | 3:9dc67659d945 | 130 | } |
yihui | 3:9dc67659d945 | 131 | return false; |
yihui | 3:9dc67659d945 | 132 | } |
yihui | 3:9dc67659d945 | 133 | |
yihui | 3:9dc67659d945 | 134 | |
yihui | 3:9dc67659d945 | 135 | int PubSubClient::readPacket(int lengthLength) |
yihui | 3:9dc67659d945 | 136 | { |
yihui | 3:9dc67659d945 | 137 | int len = 0; |
yihui | 3:9dc67659d945 | 138 | len = _client.receive_all(buffer,lengthLength); |
yihui | 3:9dc67659d945 | 139 | return len; |
yihui | 3:9dc67659d945 | 140 | } |
yihui | 3:9dc67659d945 | 141 | |
yihui | 3:9dc67659d945 | 142 | bool PubSubClient::loop() |
yihui | 3:9dc67659d945 | 143 | { |
yihui | 3:9dc67659d945 | 144 | if (connected()) { |
yihui | 3:9dc67659d945 | 145 | unsigned long t = millis(); |
yihui | 3:9dc67659d945 | 146 | if ((t - lastInActivity > MQTT_KEEPALIVE*1000UL) || (t - lastOutActivity > MQTT_KEEPALIVE*1000UL)) { |
yihui | 3:9dc67659d945 | 147 | if (pingOutstanding) { |
yihui | 3:9dc67659d945 | 148 | _client.close(); |
yihui | 3:9dc67659d945 | 149 | return false; |
yihui | 3:9dc67659d945 | 150 | } else { |
yihui | 3:9dc67659d945 | 151 | buffer[0] = MQTTPINGREQ; |
yihui | 3:9dc67659d945 | 152 | buffer[1] = 0; |
yihui | 3:9dc67659d945 | 153 | _client.send(buffer,2); |
yihui | 3:9dc67659d945 | 154 | lastOutActivity = t; |
yihui | 3:9dc67659d945 | 155 | lastInActivity = t; |
yihui | 3:9dc67659d945 | 156 | pingOutstanding = true; |
yihui | 3:9dc67659d945 | 157 | } |
yihui | 3:9dc67659d945 | 158 | } |
yihui | 3:9dc67659d945 | 159 | int len; |
yihui | 3:9dc67659d945 | 160 | int llen= 128; |
yihui | 3:9dc67659d945 | 161 | if (!((len=readPacket(llen))==0)) { |
yihui | 3:9dc67659d945 | 162 | if (len > 0) { |
yihui | 3:9dc67659d945 | 163 | lastInActivity = t; |
yihui | 3:9dc67659d945 | 164 | char type = buffer[0]&0xF0; |
yihui | 3:9dc67659d945 | 165 | if (type == MQTTPUBLISH) { |
yihui | 3:9dc67659d945 | 166 | if (callback) { |
yihui | 3:9dc67659d945 | 167 | LOG("MQTTPUBLISH - bytes received:%i\r\n", len); |
yihui | 3:9dc67659d945 | 168 | int tl = (buffer[2]<<8)+buffer[3]; |
yihui | 3:9dc67659d945 | 169 | LOG("t1:%i\r\n",tl); |
yihui | 3:9dc67659d945 | 170 | char topic[tl+1]; |
yihui | 3:9dc67659d945 | 171 | for (int i=0; i<tl; i++) { |
yihui | 3:9dc67659d945 | 172 | topic[i] = buffer[4+i]; |
yihui | 3:9dc67659d945 | 173 | } |
yihui | 3:9dc67659d945 | 174 | topic[tl] = 0; |
yihui | 3:9dc67659d945 | 175 | LOG("Topic:%s\r\n",topic); |
yihui | 3:9dc67659d945 | 176 | // ignore msgID - only support QoS 0 subs |
yihui | 3:9dc67659d945 | 177 | int t2 = len-4-tl; |
yihui | 3:9dc67659d945 | 178 | LOG("t2:%i\r\n",t2); |
yihui | 3:9dc67659d945 | 179 | char payload[t2+1]; |
yihui | 3:9dc67659d945 | 180 | for (int i=0; i<t2; i++) { |
yihui | 3:9dc67659d945 | 181 | payload[i] = buffer[4+i+tl]; |
yihui | 3:9dc67659d945 | 182 | } |
yihui | 3:9dc67659d945 | 183 | payload[t2] = 0; |
yihui | 3:9dc67659d945 | 184 | LOG("Payload:%s\r\n", payload); |
yihui | 3:9dc67659d945 | 185 | callback(topic,payload,t2); |
yihui | 3:9dc67659d945 | 186 | } |
yihui | 3:9dc67659d945 | 187 | } else if (type == MQTTPINGREQ) { |
yihui | 3:9dc67659d945 | 188 | buffer[0] = MQTTPINGRESP; |
yihui | 3:9dc67659d945 | 189 | buffer[1] = 0; |
yihui | 3:9dc67659d945 | 190 | _client.send(buffer,2); |
yihui | 3:9dc67659d945 | 191 | } else if (type == MQTTPINGRESP) { |
yihui | 3:9dc67659d945 | 192 | pingOutstanding = false; |
yihui | 3:9dc67659d945 | 193 | } |
yihui | 3:9dc67659d945 | 194 | } |
yihui | 3:9dc67659d945 | 195 | } |
yihui | 3:9dc67659d945 | 196 | return true; |
yihui | 3:9dc67659d945 | 197 | } |
yihui | 3:9dc67659d945 | 198 | return false; |
yihui | 3:9dc67659d945 | 199 | } |
yihui | 3:9dc67659d945 | 200 | |
yihui | 3:9dc67659d945 | 201 | bool PubSubClient::publish(char* topic, char* payload) |
yihui | 3:9dc67659d945 | 202 | { |
yihui | 3:9dc67659d945 | 203 | return publish(topic,payload,strlen(payload),false); |
yihui | 3:9dc67659d945 | 204 | } |
yihui | 3:9dc67659d945 | 205 | |
yihui | 3:9dc67659d945 | 206 | bool PubSubClient::publish(char* topic, char* payload, unsigned int plength) |
yihui | 3:9dc67659d945 | 207 | { |
yihui | 3:9dc67659d945 | 208 | return publish(topic, payload, plength, false); |
yihui | 3:9dc67659d945 | 209 | } |
yihui | 3:9dc67659d945 | 210 | |
yihui | 3:9dc67659d945 | 211 | bool PubSubClient::publish(char* topic, char* payload, unsigned int plength, bool retained) |
yihui | 3:9dc67659d945 | 212 | { |
yihui | 3:9dc67659d945 | 213 | if (connected()) { |
yihui | 3:9dc67659d945 | 214 | // Leave room in the buffer for header and variable length field |
yihui | 3:9dc67659d945 | 215 | LOG("publish - topic:%s, payload:%s\r\n", topic, payload); |
yihui | 3:9dc67659d945 | 216 | int length = 5; |
yihui | 3:9dc67659d945 | 217 | length = writeString(topic,buffer,length); |
yihui | 3:9dc67659d945 | 218 | int i; |
yihui | 3:9dc67659d945 | 219 | for (i=0; i<plength; i++) { |
yihui | 3:9dc67659d945 | 220 | buffer[length++] = payload[i]; |
yihui | 3:9dc67659d945 | 221 | } |
yihui | 3:9dc67659d945 | 222 | short header = MQTTPUBLISH; |
yihui | 3:9dc67659d945 | 223 | if (retained) { |
yihui | 3:9dc67659d945 | 224 | header |= 1; |
yihui | 3:9dc67659d945 | 225 | } |
yihui | 3:9dc67659d945 | 226 | return write(header,buffer,length-5); |
yihui | 3:9dc67659d945 | 227 | } |
yihui | 3:9dc67659d945 | 228 | return false; |
yihui | 3:9dc67659d945 | 229 | } |
yihui | 3:9dc67659d945 | 230 | |
yihui | 3:9dc67659d945 | 231 | |
yihui | 3:9dc67659d945 | 232 | |
yihui | 3:9dc67659d945 | 233 | bool PubSubClient::write(short header, char* buf, int length) |
yihui | 3:9dc67659d945 | 234 | { |
yihui | 3:9dc67659d945 | 235 | short lenBuf[4]; |
yihui | 3:9dc67659d945 | 236 | short llen = 0; |
yihui | 3:9dc67659d945 | 237 | short digit; |
yihui | 3:9dc67659d945 | 238 | short pos = 0; |
yihui | 3:9dc67659d945 | 239 | short rc; |
yihui | 3:9dc67659d945 | 240 | short len = length; |
yihui | 3:9dc67659d945 | 241 | do { |
yihui | 3:9dc67659d945 | 242 | digit = len % 128; |
yihui | 3:9dc67659d945 | 243 | len = len / 128; |
yihui | 3:9dc67659d945 | 244 | if (len > 0) { |
yihui | 3:9dc67659d945 | 245 | digit |= 0x80; |
yihui | 3:9dc67659d945 | 246 | } |
yihui | 3:9dc67659d945 | 247 | lenBuf[pos++] = digit; |
yihui | 3:9dc67659d945 | 248 | llen++; |
yihui | 3:9dc67659d945 | 249 | } while(len>0); |
yihui | 3:9dc67659d945 | 250 | |
yihui | 3:9dc67659d945 | 251 | buf[4-llen] = header; |
yihui | 3:9dc67659d945 | 252 | for (int i=0; i<llen; i++) { |
yihui | 3:9dc67659d945 | 253 | buf[5-llen+i] = lenBuf[i]; |
yihui | 3:9dc67659d945 | 254 | } |
yihui | 3:9dc67659d945 | 255 | rc = _client.send(buf+(4-llen),length+1+llen); |
yihui | 3:9dc67659d945 | 256 | |
yihui | 3:9dc67659d945 | 257 | lastOutActivity = millis(); |
yihui | 3:9dc67659d945 | 258 | return (rc == 1+llen+length); |
yihui | 3:9dc67659d945 | 259 | } |
yihui | 3:9dc67659d945 | 260 | |
yihui | 3:9dc67659d945 | 261 | bool PubSubClient::subscribe(char* topic) |
yihui | 3:9dc67659d945 | 262 | { |
yihui | 3:9dc67659d945 | 263 | LOG("subscribe - topic:%s\r\n",topic); |
yihui | 3:9dc67659d945 | 264 | if (connected()) { |
yihui | 3:9dc67659d945 | 265 | // Leave room in the buffer for header and variable length field |
yihui | 3:9dc67659d945 | 266 | int length = 5; |
yihui | 3:9dc67659d945 | 267 | nextMsgId++; |
yihui | 3:9dc67659d945 | 268 | if (nextMsgId == 0) { |
yihui | 3:9dc67659d945 | 269 | nextMsgId = 1; |
yihui | 3:9dc67659d945 | 270 | } |
yihui | 3:9dc67659d945 | 271 | buffer[length++] = (nextMsgId >> 8); |
yihui | 3:9dc67659d945 | 272 | buffer[length++] = (nextMsgId & 0xFF); |
yihui | 3:9dc67659d945 | 273 | length = writeString(topic, buffer,length); |
yihui | 3:9dc67659d945 | 274 | buffer[length++] = 0; // Only do QoS 0 subs |
yihui | 3:9dc67659d945 | 275 | return write(MQTTSUBSCRIBE|MQTTQOS1,buffer,length-5); |
yihui | 3:9dc67659d945 | 276 | } |
yihui | 3:9dc67659d945 | 277 | return false; |
yihui | 3:9dc67659d945 | 278 | } |
yihui | 3:9dc67659d945 | 279 | |
yihui | 3:9dc67659d945 | 280 | bool PubSubClient::unsubscribe(char* topic) |
yihui | 3:9dc67659d945 | 281 | { |
yihui | 3:9dc67659d945 | 282 | if (connected()) { |
yihui | 3:9dc67659d945 | 283 | int length = 5; |
yihui | 3:9dc67659d945 | 284 | nextMsgId++; |
yihui | 3:9dc67659d945 | 285 | if (nextMsgId == 0) { |
yihui | 3:9dc67659d945 | 286 | nextMsgId = 1; |
yihui | 3:9dc67659d945 | 287 | } |
yihui | 3:9dc67659d945 | 288 | buffer[length++] = (nextMsgId >> 8); |
yihui | 3:9dc67659d945 | 289 | buffer[length++] = (nextMsgId & 0xFF); |
yihui | 3:9dc67659d945 | 290 | length = writeString(topic, buffer,length); |
yihui | 3:9dc67659d945 | 291 | return write(MQTTUNSUBSCRIBE|MQTTQOS1,buffer,length-5); |
yihui | 3:9dc67659d945 | 292 | } |
yihui | 3:9dc67659d945 | 293 | return false; |
yihui | 3:9dc67659d945 | 294 | } |
yihui | 3:9dc67659d945 | 295 | |
yihui | 3:9dc67659d945 | 296 | void PubSubClient::disconnect() |
yihui | 3:9dc67659d945 | 297 | { |
yihui | 3:9dc67659d945 | 298 | buffer[0] = MQTTDISCONNECT; |
yihui | 3:9dc67659d945 | 299 | buffer[1] = 0; |
yihui | 3:9dc67659d945 | 300 | _client.send(buffer,2); |
yihui | 3:9dc67659d945 | 301 | _client.close(); |
yihui | 3:9dc67659d945 | 302 | lastInActivity = lastOutActivity = millis(); |
yihui | 3:9dc67659d945 | 303 | } |
yihui | 3:9dc67659d945 | 304 | |
yihui | 3:9dc67659d945 | 305 | int PubSubClient::writeString(char* string, char* buf, int pos) |
yihui | 3:9dc67659d945 | 306 | { |
yihui | 3:9dc67659d945 | 307 | char* idp = string; |
yihui | 3:9dc67659d945 | 308 | int i = 0; |
yihui | 3:9dc67659d945 | 309 | pos += 2; |
yihui | 3:9dc67659d945 | 310 | while (*idp) { |
yihui | 3:9dc67659d945 | 311 | buf[pos++] = *idp++; |
yihui | 3:9dc67659d945 | 312 | i++; |
yihui | 3:9dc67659d945 | 313 | } |
yihui | 3:9dc67659d945 | 314 | buf[pos-i-2] = (i >> 8); |
yihui | 3:9dc67659d945 | 315 | buf[pos-i-1] = (i & 0xFF); |
yihui | 3:9dc67659d945 | 316 | return pos; |
yihui | 3:9dc67659d945 | 317 | } |
yihui | 3:9dc67659d945 | 318 | |
yihui | 3:9dc67659d945 | 319 | |
yihui | 3:9dc67659d945 | 320 | bool PubSubClient::connected() |
yihui | 3:9dc67659d945 | 321 | { |
yihui | 3:9dc67659d945 | 322 | bool rc; |
yihui | 3:9dc67659d945 | 323 | rc = (int)_client.is_connected(); |
yihui | 3:9dc67659d945 | 324 | // if (!rc) _client.close(); |
yihui | 3:9dc67659d945 | 325 | return rc; |
yihui | 3:9dc67659d945 | 326 | } |