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1 /***************************************************************************** |
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2 * Copyright (C) 2014 |
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3 * |
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4 * Michiel Broek <mbroek at mbse dot eu> |
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5 * |
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6 * This file is part of the mbsePi-apps |
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7 * |
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8 * This is free software; you can redistribute it and/or modify it |
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9 * under the terms of the GNU General Public License as published by the |
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10 * Free Software Foundation; either version 2, or (at your option) any |
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11 * later version. |
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12 * |
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13 * mbsePi-apps is distributed in the hope that it will be useful, but |
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU General Public License |
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19 * along with EC-65K; see the file COPYING. If not, write to the Free |
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20 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
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21 *****************************************************************************/ |
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22 |
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23 #include "../lib/mbselib.h" |
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24 #include "mosquitto.h" |
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25 |
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26 #ifdef HAVE_WIRINGPI_H |
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27 |
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28 |
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29 #define STATUS_CONNECTING 0 |
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30 #define STATUS_CONNACK_RECVD 1 |
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31 #define STATUS_WAITING 2 |
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32 |
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33 /* Global variables for use in callbacks. */ |
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34 struct mosquitto *mymosq = NULL; |
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35 char *myhostname; |
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36 static int qos = 0; |
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37 static int status = STATUS_CONNECTING; |
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38 static int mid_sent = 0; |
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39 static int last_mid = -1; |
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40 static int last_mid_sent = -1; |
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41 static bool connected = true; |
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42 static bool disconnect_sent = false; |
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43 static bool connect_lost = false; |
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44 |
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45 extern bool my_shutdown; |
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46 extern bool debug; |
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47 extern sys_config Config; |
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48 extern int lcdHandle; |
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49 extern int lcdupdate; |
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50 |
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51 |
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52 void my_connect_callback(struct mosquitto *mosq, void *obj, int result) |
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53 { |
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54 if (connect_lost) { |
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55 connect_lost = false; |
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56 syslog(LOG_NOTICE, "Reconnect: %s", mosquitto_connack_string(result)); |
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57 } |
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58 |
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59 if (!result) { |
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60 status = STATUS_CONNACK_RECVD; |
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61 } else { |
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62 syslog(LOG_NOTICE, "my_connect_callback: %s\n", mosquitto_connack_string(result)); |
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63 } |
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64 } |
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65 |
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66 |
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67 |
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68 void my_disconnect_callback(struct mosquitto *mosq, void *obj, int rc) |
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69 { |
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70 if (my_shutdown) { |
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71 syslog(LOG_NOTICE, "Acknowledged DISCONNECT from %s", Config.mosq_host); |
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72 connected = false; |
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73 } else { |
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74 /* |
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75 * The remove server was brought down. We must keep running |
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76 */ |
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77 syslog(LOG_NOTICE, "Received DISCONNECT from %s, connection lost", Config.mosq_host); |
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78 connect_lost = true; |
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79 } |
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80 } |
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81 |
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82 |
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83 |
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84 void my_publish_callback(struct mosquitto *mosq, void *obj, int mid) |
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85 { |
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86 last_mid_sent = mid; |
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87 } |
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88 |
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89 |
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90 |
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91 void my_log_callback(struct mosquitto *mosq, void *obj, int level, const char *str) |
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92 { |
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93 syslog(LOG_NOTICE, "MQTT: %s", str); |
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94 printf("MQTT: %s\n", str); |
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95 } |
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96 |
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97 |
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98 |
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99 int my_mosquitto_init(void) |
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100 { |
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101 char *id = NULL, *state = NULL; |
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102 char buf[1024]; |
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103 int try, rc, keepalive = 60; |
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104 unsigned int max_inflight = 20; |
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105 char err[1024]; |
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106 w1_therm *tmp1, *old1; |
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107 rc_switch *tmp2, *old2; |
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108 char *alias; |
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109 |
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110 /* |
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111 * Initialize mosquitto communication |
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112 */ |
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113 mosquitto_lib_init(); |
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114 |
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115 gethostname(buf, 255); |
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116 myhostname = xstrcpy(buf); |
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117 |
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118 /* |
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119 * Build MQTT id |
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120 */ |
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121 id = xstrcpy((char *)"thermferm/"); |
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122 id = xstrcat(id, myhostname); |
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123 if(strlen(id) > MOSQ_MQTT_ID_MAX_LENGTH) { |
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124 /* |
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125 * Enforce maximum client id length of 23 characters |
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126 */ |
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127 id[MOSQ_MQTT_ID_MAX_LENGTH] = '\0'; |
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128 } |
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129 |
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130 mymosq = mosquitto_new(id, true, NULL); |
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131 if (!mymosq) { |
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132 switch(errno) { |
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133 case ENOMEM: |
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134 syslog(LOG_NOTICE, "mosquitto_new: Out of memory"); |
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135 break; |
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136 case EINVAL: |
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137 syslog(LOG_NOTICE, "mosquitto_new: Invalid id"); |
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138 break; |
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139 } |
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140 mosquitto_lib_cleanup(); |
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141 return 1; |
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142 } |
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143 |
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144 if (debug) { |
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145 mosquitto_log_callback_set(mymosq, my_log_callback); |
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146 } |
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147 |
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148 /* |
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149 * Set our will |
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150 */ |
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151 state = xstrcpy((char *)"clients/"); |
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152 state = xstrcat(state, myhostname); |
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153 state = xstrcat(state, (char *)"/thermferm/state"); |
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154 sprintf(buf, "0"); |
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155 if ((rc = mosquitto_will_set(mymosq, state, strlen(buf), buf, qos, true))) { |
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156 if (rc == MOSQ_ERR_INVAL) { |
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157 syslog(LOG_NOTICE, "mosquitto_will_set: input parameters invalid"); |
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158 } else if (rc == MOSQ_ERR_NOMEM) { |
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159 syslog(LOG_NOTICE, "mosquitto_will_set: Out of Memory"); |
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160 } else if (rc == MOSQ_ERR_PAYLOAD_SIZE) { |
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161 syslog(LOG_NOTICE, "mosquitto_will_set: invalid payload size"); |
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162 } |
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163 mosquitto_lib_cleanup(); |
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164 return rc; |
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165 } |
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166 |
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167 mosquitto_max_inflight_messages_set(mymosq, max_inflight); |
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168 mosquitto_connect_callback_set(mymosq, my_connect_callback); |
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169 mosquitto_disconnect_callback_set(mymosq, my_disconnect_callback); |
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170 mosquitto_publish_callback_set(mymosq, my_publish_callback); |
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171 |
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172 try = 10; rc = -1; |
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173 while (try && rc) { |
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174 if ((rc = mosquitto_connect(mymosq, Config.mosq_host, Config.mosq_port, keepalive))) { |
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175 if (rc == MOSQ_ERR_ERRNO) { |
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176 strerror_r(errno, err, 1024); |
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177 syslog(LOG_NOTICE, "mosquitto_connect: error: %s, try=%d", err, 11-try); |
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178 } else { |
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179 syslog(LOG_NOTICE, "mosquitto_connect: unable to connect (%d)", rc); |
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180 } |
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181 sleep(2); |
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182 try--; |
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183 } |
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184 } |
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185 if (rc) { |
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186 syslog(LOG_NOTICE, "mosquitto_connect: too many tries, giving up"); |
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187 mosquitto_lib_cleanup(); |
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188 return rc; |
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189 } |
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190 syslog(LOG_NOTICE, "Connected with %s:%d", Config.mosq_host, Config.mosq_port); |
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191 |
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192 /* |
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193 * Initialise is complete, report our presence state |
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194 */ |
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195 mosquitto_loop_start(mymosq); |
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196 sprintf(buf, "1"); |
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197 rc = mosquitto_publish(mymosq, &mid_sent, state, strlen(buf), buf, qos, 1); |
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198 |
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199 /* |
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200 * Report alias names |
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201 */ |
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202 for (tmp1 = Config.w1therms; tmp1; tmp1 = old1) { |
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203 old1 = tmp1->next; |
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204 |
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205 alias = xstrcpy((char *)"/raw/"); |
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206 alias = xstrcat(alias, myhostname); |
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207 alias = xstrcat(alias, (char *)"/thermferm/w1/"); |
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208 alias = xstrcat(alias, tmp1->master); |
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209 alias = xstrcat(alias, (char *)"/"); |
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210 alias = xstrcat(alias, tmp1->name); |
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211 alias = xstrcat(alias, (char *)"/alias"); |
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212 |
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213 sprintf(buf, "%s", tmp1->alias); |
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214 if ((rc = mosquitto_publish(mymosq, &mid_sent, alias, strlen(buf), buf, qos, 1))) { |
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215 if (rc == MOSQ_ERR_NO_CONN) |
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216 mosquitto_reconnect(mymosq); |
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217 else |
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218 syslog(LOG_NOTICE, "mainloop: error %d from mosquitto_publish", rc); |
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219 } |
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220 |
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221 free(alias); |
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222 alias = NULL; |
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223 } |
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224 |
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225 for (tmp2 = Config.rcswitch; tmp2; tmp2 = old2) { |
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226 old2 = tmp2->next; |
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227 |
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228 alias = xstrcpy((char *)"/raw/"); |
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229 alias = xstrcat(alias, myhostname); |
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230 alias = xstrcat(alias, (char *)"/thermferm/rcswitch/"); |
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231 alias = xstrcat(alias, tmp2->address); |
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232 alias = xstrcat(alias, (char *)"/alias"); |
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233 |
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234 sprintf(buf, "%s", tmp2->alias); |
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235 if ((rc = mosquitto_publish(mymosq, &mid_sent, alias, strlen(buf), buf, qos, 1))) { |
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236 if (rc == MOSQ_ERR_NO_CONN) |
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237 mosquitto_reconnect(mymosq); |
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238 else |
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239 syslog(LOG_NOTICE, "my_mosquitto_init: error %d from mosquitto_publish", rc); |
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240 } |
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241 |
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242 free(alias); |
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243 alias = NULL; |
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244 my_mosquitto_switch(tmp2->address, 0); |
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245 } |
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246 |
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247 return 0; |
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248 } |
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249 |
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250 |
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251 |
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252 int my_mosquitto_switch(char *address, int state) |
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253 { |
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254 char *cmd = NULL, buf[10]; |
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255 int rc; |
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256 |
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257 cmd = xstrcpy(address); |
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258 if (state) |
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259 cmd = xstrcat(cmd, (char *)",1"); |
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260 else |
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261 cmd = xstrcat(cmd, (char *)",0"); |
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262 rc = toggleSwitch(cmd); |
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263 if (debug) |
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264 fprintf(stdout, "Switch %s rc=%d\n", cmd, rc); |
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265 syslog(LOG_NOTICE, "Switch %s rc=%d", cmd, rc); |
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266 free(cmd); |
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267 |
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268 cmd = xstrcpy((char *)"/raw/"); |
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269 cmd = xstrcat(cmd, myhostname); |
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270 cmd = xstrcat(cmd, (char *)"/thermferm/rcswitch/"); |
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271 cmd = xstrcat(cmd, address); |
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272 cmd = xstrcat(cmd, (char *)"/state"); |
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273 sprintf(buf, "%d", state); |
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274 |
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275 if ((rc = mosquitto_publish(mymosq, &mid_sent, cmd, strlen(buf), buf, qos, 1))) { |
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276 if (rc == MOSQ_ERR_NO_CONN) |
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277 mosquitto_reconnect(mymosq); |
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278 else |
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279 syslog(LOG_NOTICE, "my_mosquitto_switch: error %d from mosquitto_publish", rc); |
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280 } |
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281 |
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282 free(cmd); |
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283 cmd = NULL; |
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284 |
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285 return rc; |
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286 } |
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287 |
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288 |
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289 |
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290 int my_mosquitto_loop(void) |
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291 { |
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292 w1_therm *tmp1, *old1; |
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293 char buf[1024], *alias, *state = NULL; |
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294 int rc; |
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295 |
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296 if (status == STATUS_CONNACK_RECVD) { |
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297 /* |
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298 * Here send our 1-wire sensors values |
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299 */ |
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300 for (tmp1 = Config.w1therms; tmp1; tmp1 = old1) { |
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301 old1 = tmp1->next; |
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302 |
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303 if (tmp1->update) { |
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304 /* |
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305 * Build path and alias topic |
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306 */ |
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307 alias = xstrcpy((char *)"/raw/"); |
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308 alias = xstrcat(alias, myhostname); |
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309 alias = xstrcat(alias, (char *)"/thermferm/w1/"); |
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310 alias = xstrcat(alias, tmp1->master); |
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311 alias = xstrcat(alias, (char *)"/"); |
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312 alias = xstrcat(alias, tmp1->name); |
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313 alias = xstrcat(alias, (char *)"/temperature"); |
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314 |
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315 /* |
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316 * Publish the temperature. |
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317 */ |
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318 sprintf(buf, "%.1f", tmp1->lastval / 1000.0); |
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319 if ((rc = mosquitto_publish(mymosq, &mid_sent, alias, strlen(buf), buf, qos, 1))) { |
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320 if (rc == MOSQ_ERR_NO_CONN) |
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321 mosquitto_reconnect(mymosq); |
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322 else |
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323 syslog(LOG_NOTICE, "mainloop: error %d from mosquitto_publish", rc); |
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324 } |
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325 tmp1->update = FALSE; |
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326 lcdupdate = TRUE; |
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327 |
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328 free(alias); |
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329 alias = NULL; |
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330 } |
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331 } |
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332 |
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333 if (my_shutdown) { |
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334 /* |
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335 * Final publish 0 to clients/<hostname>/thermferm/state |
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336 */ |
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337 sprintf(buf, "0"); |
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338 mosquitto_publish(mymosq, &mid_sent, state, strlen(buf), buf, qos, true); |
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339 last_mid = mid_sent; |
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340 status = STATUS_WAITING; |
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341 mb_lcdClear(lcdHandle); |
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342 // lcdPosition(lcdHandle, 0, 0); |
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343 mb_lcdPuts(lcdHandle, "Shuting down ..."); |
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344 } |
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345 |
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346 } else if (status == STATUS_WAITING) { |
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347 if (debug) |
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348 fprintf(stdout, (char *)"Waiting\n"); |
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349 if (last_mid_sent == last_mid && disconnect_sent == false) { |
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350 mosquitto_disconnect(mymosq); |
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351 disconnect_sent = true; |
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352 } |
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353 } |
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354 rc = MOSQ_ERR_SUCCESS; |
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355 |
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356 return (rc == MOSQ_ERR_SUCCESS && connected); |
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357 } |
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358 |
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359 |
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360 |
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361 void my_mosquitto_exit(void) |
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362 { |
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363 mosquitto_loop_stop(mymosq, false); |
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364 mosquitto_destroy(mymosq); |
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365 mosquitto_lib_cleanup(); |
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366 } |
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367 |
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368 |
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369 #endif |