1 | #include <stdlib.h> |
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2 | #include <string.h> |
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3 | |
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4 | #include <unistd.h> |
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5 | #include <sys/types.h> |
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6 | #include <sys/socket.h> |
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7 | #include <netinet/in.h> |
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8 | #include <netdb.h> |
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9 | |
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10 | #include "baseclient.h" |
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11 | #include "basedriver.h" |
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12 | #include "indicom.h" |
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13 | |
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14 | #include <errno.h> |
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15 | |
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16 | #define MAXINDIBUF 64 |
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17 | |
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18 | INDI::BaseClient::BaseClient() |
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19 | { |
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20 | cServer = "localhost"; |
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21 | cPort = 7624; |
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22 | |
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23 | } |
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24 | |
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25 | |
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26 | INDI::BaseClient::~BaseClient() |
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27 | { |
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28 | |
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29 | disconnect(); |
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30 | |
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31 | } |
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32 | |
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33 | void INDI::BaseClient::setServer(const char * hostname, unsigned int port) |
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34 | { |
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35 | cServer = hostname; |
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36 | cPort = port; |
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37 | |
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38 | } |
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39 | |
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40 | void INDI::BaseClient::watchDevice(const char * deviceName) |
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41 | { |
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42 | cDeviceNames.push_back(deviceName); |
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43 | } |
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44 | |
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45 | bool INDI::BaseClient::connect() |
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46 | { |
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47 | struct sockaddr_in serv_addr; |
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48 | struct hostent *hp; |
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49 | |
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50 | /* lookup host address */ |
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51 | hp = gethostbyname(cServer.c_str()); |
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52 | if (!hp) |
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53 | { |
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54 | herror ("gethostbyname"); |
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55 | return false; |
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56 | } |
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57 | |
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58 | /* create a socket to the INDI server */ |
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59 | (void) memset ((char *)&serv_addr, 0, sizeof(serv_addr)); |
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60 | serv_addr.sin_family = AF_INET; |
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61 | serv_addr.sin_addr.s_addr = ((struct in_addr *)(hp->h_addr_list[0]))->s_addr; |
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62 | serv_addr.sin_port = htons(cPort); |
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63 | if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) < 0) |
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64 | { |
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65 | perror ("socket"); |
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66 | return false; |
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67 | } |
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68 | |
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69 | /* connect */ |
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70 | if (::connect (sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr))<0) |
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71 | { |
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72 | perror ("connect"); |
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73 | return false; |
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74 | } |
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75 | |
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76 | /* prepare for line-oriented i/o with client */ |
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77 | svrwfp = fdopen (sockfd, "w"); |
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78 | svrrfp = fdopen (sockfd, "r"); |
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79 | |
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80 | int result = pthread_create( &listen_thread, NULL, &INDI::BaseClient::listenHelper, this); |
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81 | |
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82 | if (result != 0) |
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83 | { |
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84 | perror("thread"); |
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85 | return false; |
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86 | } |
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87 | |
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88 | return true; |
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89 | } |
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90 | |
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91 | void INDI::BaseClient::disconnect() |
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92 | { |
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93 | char errmsg[MAXRBUF]; |
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94 | removeDevice(NULL, errmsg); |
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95 | if (lillp) |
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96 | delLilXML(lillp); |
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97 | lillp = NULL; |
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98 | pthread_cancel(listen_thread); |
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99 | close(sockfd); |
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100 | if (svrwfp) |
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101 | fclose(svrwfp); |
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102 | svrwfp = NULL; |
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103 | if (svrrfp) |
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104 | fclose(svrrfp); |
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105 | svrrfp = NULL; |
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106 | } |
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107 | |
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108 | INDI::BaseDriver * INDI::BaseClient::getDevice(const char * deviceName) |
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109 | { |
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110 | vector<INDI::BaseDriver *>::const_iterator devi; |
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111 | for ( devi = cDevices.begin(); devi != cDevices.end(); devi++) |
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112 | if (!strcmp(deviceName, (*devi)->deviceName())) |
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113 | return (*devi); |
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114 | |
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115 | return NULL; |
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116 | } |
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117 | |
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118 | void * INDI::BaseClient::listenHelper(void *context) |
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119 | { |
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120 | (static_cast<INDI::BaseClient *> (context))->listenINDI(); |
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121 | } |
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122 | |
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123 | void INDI::BaseClient::listenINDI() |
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124 | { |
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125 | char msg[MAXRBUF]; |
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126 | char buffer[MAXINDIBUF]; |
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127 | int n=0, err_code=0; |
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128 | |
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129 | if (cDeviceNames.empty()) |
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130 | fprintf(svrwfp, "<getProperties version='%g'/>\n", INDIV); |
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131 | else |
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132 | { |
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133 | vector<string>::const_iterator stri; |
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134 | for ( stri = cDeviceNames.begin(); stri != cDeviceNames.end(); stri++) |
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135 | fprintf(svrwfp, "<getProperties version='%g' device='%s'/>\n", INDIV, (*stri).c_str()); |
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136 | } |
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137 | |
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138 | fflush (svrwfp); |
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139 | |
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140 | lillp = newLilXML(); |
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141 | |
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142 | /* read from server, exit if find all requested properties */ |
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143 | while (1) |
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144 | { |
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145 | n = fread(buffer, 1, MAXINDIBUF, svrrfp); |
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146 | |
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147 | if (n ==0) |
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148 | { |
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149 | if (ferror(svrrfp)) |
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150 | perror ("read"); |
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151 | else |
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152 | fprintf (stderr,"INDI server %s/%d disconnected\n", cServer.c_str(), cPort); |
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153 | |
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154 | serverDisconnected(); |
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155 | return; |
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156 | } |
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157 | |
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158 | for (int i=0; i < n; i++) |
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159 | { |
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160 | XMLEle *root = readXMLEle (lillp, buffer[i], msg); |
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161 | if (root) |
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162 | { |
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163 | if ( (err_code = dispatchCommand(root, msg)) < 0) |
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164 | { |
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165 | // Silenty ignore property duplication errors |
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166 | if (err_code != INDI_PROPERTY_DUPLICATED) |
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167 | { |
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168 | IDLog("Dispatch command error: %s\n", msg); |
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169 | prXMLEle (stderr, root, 0); |
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170 | } |
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171 | } |
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172 | |
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173 | delXMLEle (root); /* not yet, delete and continue */ |
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174 | } |
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175 | else if (msg[0]) |
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176 | { |
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177 | fprintf (stderr, "Bad XML from %s/%d: %s\n%s\n", cServer.c_str(), cPort, msg, buffer); |
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178 | return; |
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179 | } |
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180 | } |
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181 | } |
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182 | } |
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183 | |
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184 | int INDI::BaseClient::dispatchCommand(XMLEle *root, char * errmsg) |
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185 | { |
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186 | if (!strcmp (tagXMLEle(root), "message")) |
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187 | return messageCmd(root, errmsg); |
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188 | else if (!strcmp (tagXMLEle(root), "delProperty")) |
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189 | return delPropertyCmd(root, errmsg); |
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190 | |
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191 | /* Get the device, if not available, create it */ |
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192 | INDI::BaseDriver *dp = findDev (root, 1, errmsg); |
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193 | if (dp == NULL) |
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194 | { |
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195 | strcpy(errmsg,"No device available and none was created"); |
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196 | return INDI_DEVICE_NOT_FOUND; |
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197 | } |
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198 | |
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199 | if ((!strcmp (tagXMLEle(root), "defTextVector")) || |
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200 | (!strcmp (tagXMLEle(root), "defNumberVector")) || |
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201 | (!strcmp (tagXMLEle(root), "defSwitchVector")) || |
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202 | (!strcmp (tagXMLEle(root), "defLightVector")) || |
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203 | (!strcmp (tagXMLEle(root), "defBLOBVector"))) |
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204 | return dp->buildProp(root, errmsg); |
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205 | else if (!strcmp (tagXMLEle(root), "setTextVector") || |
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206 | !strcmp (tagXMLEle(root), "setNumberVector") || |
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207 | !strcmp (tagXMLEle(root), "setSwitchVector") || |
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208 | !strcmp (tagXMLEle(root), "setLightVector") || |
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209 | !strcmp (tagXMLEle(root), "setBLOBVector")) |
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210 | return dp->setValue(root, errmsg); |
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211 | |
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212 | return INDI_DISPATCH_ERROR; |
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213 | } |
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214 | |
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215 | /* delete the property in the given device, including widgets and data structs. |
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216 | * when last property is deleted, delete the device too. |
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217 | * if no property name attribute at all, delete the whole device regardless. |
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218 | * return 0 if ok, else -1 with reason in errmsg[]. |
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219 | */ |
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220 | int INDI::BaseClient::delPropertyCmd (XMLEle *root, char * errmsg) |
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221 | { |
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222 | XMLAtt *ap; |
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223 | INDI::BaseDriver *dp; |
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224 | |
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225 | /* dig out device and optional property name */ |
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226 | dp = findDev (root, 0, errmsg); |
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227 | if (!dp) |
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228 | return INDI_DEVICE_NOT_FOUND; |
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229 | |
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230 | checkMsg(root, dp); |
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231 | |
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232 | ap = findXMLAtt (root, "name"); |
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233 | |
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234 | /* Delete property if it exists, otherwise, delete the whole device */ |
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235 | if (ap) |
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236 | return dp->removeProperty(valuXMLAtt(ap)); |
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237 | // delete the whole device |
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238 | else |
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239 | return removeDevice(dp->deviceName(), errmsg); |
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240 | } |
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241 | |
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242 | int INDI::BaseClient::removeDevice( const char * devName, char * errmsg ) |
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243 | { |
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244 | std::vector<INDI::BaseDriver *>::iterator devicei = cDevices.begin(); |
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245 | |
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246 | while (devicei != cDevices.end()) |
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247 | { |
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248 | if (devName == NULL || !strcmp(devName, (*devicei)->deviceName())) |
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249 | { |
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250 | cDevices.erase(devicei); |
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251 | delete (*devicei); |
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252 | return 0; |
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253 | } |
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254 | |
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255 | devicei++; |
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256 | } |
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257 | |
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258 | snprintf(errmsg, MAXRBUF, "Device %s not found", devName); |
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259 | return INDI_DEVICE_NOT_FOUND; |
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260 | } |
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261 | |
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262 | INDI::BaseDriver * INDI::BaseClient::findDev( const char * devName, char * errmsg ) |
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263 | { |
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264 | |
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265 | std::vector<INDI::BaseDriver *>::const_iterator devicei; |
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266 | |
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267 | for (devicei = cDevices.begin(); devicei != cDevices.end(); devicei++) |
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268 | { |
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269 | if (!strcmp(devName, (*devicei)->deviceName())) |
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270 | return (*devicei); |
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271 | |
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272 | } |
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273 | |
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274 | snprintf(errmsg, MAXRBUF, "Device %s not found", devName); |
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275 | return NULL; |
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276 | } |
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277 | |
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278 | /* add new device */ |
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279 | INDI::BaseDriver * INDI::BaseClient::addDevice (XMLEle *dep, char * errmsg) |
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280 | { |
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281 | INDI::BaseDriver *dp; |
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282 | XMLAtt *ap; |
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283 | char * device_name; |
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284 | |
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285 | /* allocate new INDI::BaseDriver */ |
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286 | ap = findXMLAtt (dep, "device"); |
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287 | if (!ap) |
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288 | { |
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289 | strncpy(errmsg, "Unable to find device attribute in XML element. Cannot add device.", MAXRBUF); |
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290 | return NULL; |
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291 | } |
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292 | |
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293 | device_name = valuXMLAtt(ap); |
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294 | |
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295 | dp = new INDI::BaseDriver(); |
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296 | dp->setMediator(this); |
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297 | dp->setDeviceName(device_name); |
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298 | |
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299 | cDevices.push_back(dp); |
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300 | |
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301 | newDevice(); |
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302 | |
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303 | /* ok */ |
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304 | return dp; |
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305 | } |
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306 | |
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307 | INDI::BaseDriver * INDI::BaseClient::findDev (XMLEle *root, int create, char * errmsg) |
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308 | { |
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309 | XMLAtt *ap; |
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310 | INDI::BaseDriver *dp; |
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311 | char *dn; |
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312 | |
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313 | /* get device name */ |
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314 | ap = findXMLAtt (root, "device"); |
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315 | if (!ap) |
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316 | { |
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317 | snprintf(errmsg, MAXRBUF, "No device attribute found in element %s", tagXMLEle(root)); |
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318 | return (NULL); |
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319 | } |
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320 | |
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321 | dn = valuXMLAtt(ap); |
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322 | |
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323 | dp = findDev(dn, errmsg); |
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324 | |
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325 | if (dp) |
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326 | return dp; |
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327 | |
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328 | /* not found, create if ok */ |
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329 | if (create) |
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330 | return (addDevice (root, errmsg)); |
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331 | |
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332 | snprintf(errmsg, MAXRBUF, "INDI: <%s> no such device %s", tagXMLEle(root), dn); |
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333 | return NULL; |
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334 | } |
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335 | |
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336 | /* a general message command received from the device. |
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337 | * return 0 if ok, else -1 with reason in errmsg[]. |
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338 | */ |
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339 | int INDI::BaseClient::messageCmd (XMLEle *root, char * errmsg) |
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340 | { |
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341 | checkMsg (root, findDev (root, 0, errmsg)); |
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342 | return (0); |
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343 | } |
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344 | |
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345 | /* add message to queue |
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346 | * N.B. don't put carriage control in msg, we take care of that. |
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347 | */ |
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348 | void INDI::BaseClient::checkMsg (XMLEle *root, INDI::BaseDriver *dp) |
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349 | { |
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350 | XMLAtt *ap; |
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351 | ap = findXMLAtt(root, "message"); |
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352 | |
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353 | if (ap) |
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354 | doMsg(root, dp); |
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355 | } |
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356 | |
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357 | /* Store msg in queue */ |
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358 | void INDI::BaseClient::doMsg (XMLEle *msg, INDI::BaseDriver *dp) |
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359 | { |
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360 | XMLAtt *message; |
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361 | XMLAtt *time_stamp; |
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362 | char msgBuffer[MAXRBUF]; |
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363 | |
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364 | if (dp == NULL) |
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365 | return; |
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366 | |
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367 | /* prefix our timestamp if not with msg */ |
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368 | time_stamp = findXMLAtt (msg, "timestamp"); |
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369 | |
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370 | if (time_stamp) |
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371 | snprintf(msgBuffer, MAXRBUF, "%s ", valuXMLAtt(time_stamp)); |
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372 | else |
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373 | snprintf(msgBuffer, MAXRBUF, "%s ", timestamp()); |
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374 | |
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375 | /* finally! the msg */ |
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376 | message = findXMLAtt(msg, "message"); |
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377 | |
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378 | if (!message) return; |
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379 | |
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380 | // Prepend to the log |
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381 | dp->addMessage(msgBuffer); |
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382 | dp->addMessage(valuXMLAtt(message)); |
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383 | dp->addMessage("\n"); |
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384 | \ |
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385 | } |
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386 | |
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387 | void INDI::BaseClient::sendNewText (ITextVectorProperty *tvp) |
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388 | { |
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389 | fprintf(svrwfp, "<newTextVector\n"); |
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390 | fprintf(svrwfp, " device='%s'\n", tvp->device); |
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391 | fprintf(svrwfp, " name='%s'\n>", tvp->name); |
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392 | |
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393 | for (int i=0; i < tvp->ntp; i++) |
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394 | { |
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395 | fprintf(svrwfp, " <oneText\n"); |
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396 | fprintf(svrwfp, " name='%s'>\n", tvp->tp[i].name); |
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397 | fprintf(svrwfp, " %s\n", tvp->tp[i].text); |
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398 | fprintf(svrwfp, " </oneText>\n"); |
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399 | } |
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400 | fprintf(svrwfp, "</newTextVector>\n"); |
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401 | |
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402 | fflush(svrwfp); |
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403 | } |
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404 | |
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405 | void INDI::BaseClient::sendNewNumber (INumberVectorProperty *nvp) |
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406 | { |
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407 | fprintf(svrwfp, "<newNumberVector\n"); |
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408 | fprintf(svrwfp, " device='%s'\n", nvp->device); |
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409 | fprintf(svrwfp, " name='%s'\n>", nvp->name); |
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410 | |
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411 | for (int i=0; i < nvp->nnp; i++) |
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412 | { |
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413 | fprintf(svrwfp, " <oneNumber\n"); |
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414 | fprintf(svrwfp, " name='%s'>\n", nvp->np[i].name); |
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415 | fprintf(svrwfp, " %g\n", nvp->np[i].value); |
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416 | fprintf(svrwfp, " </oneNumber>\n"); |
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417 | } |
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418 | fprintf(svrwfp, "</newNumberVector>\n"); |
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419 | |
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420 | fflush(svrwfp); |
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421 | } |
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422 | |
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423 | void INDI::BaseClient::sendNewSwitch (ISwitchVectorProperty *svp, ISwitch *sp) |
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424 | { |
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425 | fprintf(svrwfp, "<newSwitchVector\n"); |
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426 | |
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427 | fprintf(svrwfp, " device='%s'\n", svp->device); |
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428 | fprintf(svrwfp, " name='%s'>\n", svp->name); |
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429 | fprintf(svrwfp, " <oneSwitch\n"); |
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430 | fprintf(svrwfp, " name='%s'>\n", sp->name); |
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431 | fprintf(svrwfp, " %s\n", (sp->s == ISS_ON) ? "On" : "Off"); |
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432 | fprintf(svrwfp, " </oneSwitch>\n"); |
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433 | |
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434 | fprintf(svrwfp, "</newSwitchVector>\n"); |
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435 | |
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436 | fflush(svrwfp); |
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437 | } |
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438 | |
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439 | void INDI::BaseClient::startBlob( const char *devName, const char *propName, const char *timestamp) |
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440 | { |
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441 | fprintf(svrwfp, "<newBLOBVector\n"); |
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442 | fprintf(svrwfp, " device='%s'\n", devName); |
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443 | fprintf(svrwfp, " name='%s'\n", propName); |
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444 | fprintf(svrwfp, " timestamp='%s'>\n", timestamp); |
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445 | } |
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446 | |
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447 | void INDI::BaseClient::sendOneBlob( const char *blobName, unsigned int blobSize, const char *blobFormat, unsigned char * blobBuffer) |
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448 | { |
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449 | fprintf(svrwfp, " <oneBLOB\n"); |
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450 | fprintf(svrwfp, " name='%s'\n", blobName); |
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451 | fprintf(svrwfp, " size='%d'\n", blobSize); |
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452 | fprintf(svrwfp, " format='%s'>\n", blobFormat); |
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453 | |
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454 | for (unsigned i = 0; i < blobSize; i += 72) |
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455 | fprintf(svrwfp, " %.72s\n", blobBuffer+i); |
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456 | |
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457 | fprintf(svrwfp, " </oneBLOB>\n"); |
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458 | } |
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459 | |
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460 | void INDI::BaseClient::finishBlob() |
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461 | { |
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462 | fprintf(svrwfp, "</newBLOBVector>\n"); |
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463 | fflush(svrwfp); |
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464 | |
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465 | } |
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466 | |
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467 | void INDI::BaseClient::setBLOBMode(BLOBHandling blobH, const char *dev, const char *prop) |
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468 | { |
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469 | char blobOpenTag[64]; |
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470 | |
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471 | if (dev) |
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472 | { |
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473 | if (prop) |
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474 | snprintf(blobOpenTag, 64, "<enableBLOB device='%s' name='%s'>", dev, prop); |
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475 | else |
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476 | snprintf(blobOpenTag, 64, "<enableBLOB device='%s'>", dev); |
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477 | } |
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478 | else |
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479 | snprintf(blobOpenTag, 64, "<enableBLOB>", dev, prop); |
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480 | |
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481 | |
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482 | switch (blobH) |
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483 | { |
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484 | case B_NEVER: |
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485 | fprintf(svrwfp, "%sNever</enableBLOB>\n", blobOpenTag); |
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486 | break; |
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487 | case B_ALSO: |
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488 | fprintf(svrwfp, "%sAlso</enableBLOB>\n", blobOpenTag); |
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489 | break; |
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490 | case B_ONLY: |
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491 | fprintf(svrwfp, "%sOnly</enableBLOB>\n", blobOpenTag); |
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492 | break; |
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493 | } |
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494 | |
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495 | fflush(svrwfp); |
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496 | } |
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497 | |
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498 | |
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499 | |
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