1 | /*
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2 | Easy example NTRIP client for POSIX.
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3 | $Id: ntripclient.c,v 1.31 2007/09/18 07:09:07 stoecker Exp $
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4 | Copyright (C) 2003-2005 by Dirk Stoecker <soft@dstoecker.de>
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5 |
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6 | This program is free software; you can redistribute it and/or modify
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7 | it under the terms of the GNU General Public License as published by
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8 | the Free Software Foundation; either version 2 of the License, or
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9 | (at your option) any later version.
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10 |
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11 | This program is distributed in the hope that it will be useful,
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | GNU General Public License for more details.
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15 |
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16 | You should have received a copy of the GNU General Public License
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17 | along with this program; if not, write to the Free Software
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18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 | or read http://www.gnu.org/licenses/gpl.txt
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20 | */
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21 |
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22 | #include <ctype.h>
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23 | #include <getopt.h>
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24 | #include <signal.h>
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25 | #include <stdio.h>
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26 | #include <stdlib.h>
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27 | #include <unistd.h>
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28 | #include <errno.h>
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29 | #include <string.h>
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30 | #include <netdb.h>
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31 | #include <sys/types.h>
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32 | #include <netinet/in.h>
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33 | #include <sys/socket.h>
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34 | #include <time.h>
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35 |
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36 | #ifndef COMPILEDATE
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37 | #define COMPILEDATE " built " __DATE__
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38 | #endif
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39 |
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40 | /* The string, which is send as agent in HTTP request */
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41 | #define AGENTSTRING "NTRIP NtripClientPOSIX"
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42 |
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43 | #define MAXDATASIZE 1000 /* max number of bytes we can get at once */
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44 | #define ALARMTIME (2*60)
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45 |
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46 | /* CVS revision and version */
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47 | static char revisionstr[] = "$Revision: 1.31 $";
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48 | static char datestr[] = "$Date: 2007/09/18 07:09:07 $";
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49 |
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50 | enum MODE { HTTP = 1, RTSP = 2, NTRIP1 = 3, AUTO = 4, END };
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51 |
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52 | struct Args
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53 | {
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54 | const char *server;
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55 | const char *port;
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56 | const char *user;
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57 | const char *proxyhost;
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58 | const char *proxyport;
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59 | const char *password;
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60 | const char *nmea;
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61 | const char *data;
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62 | int bitrate;
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63 | int mode;
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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 | /* option parsing */
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69 | #ifdef NO_LONG_OPTS
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70 | #define LONG_OPT(a)
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71 | #else
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72 | #define LONG_OPT(a) a
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73 | static struct option opts[] = {
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74 | { "bitrate", no_argument, 0, 'b'},
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75 | { "data", required_argument, 0, 'd'},
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76 | { "server", required_argument, 0, 's'},
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77 | { "password", required_argument, 0, 'p'},
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78 | { "port", required_argument, 0, 'r'},
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79 | { "proxyport", required_argument, 0, 'R'},
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80 | { "proxyhost", required_argument, 0, 'S'},
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81 | { "user", required_argument, 0, 'u'},
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82 | { "nmea", required_argument, 0, 'n'},
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83 | { "help", no_argument, 0, 'h'},
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84 | {0,0,0,0}};
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85 | #endif
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86 | #define ARGOPT "-d:bhp:r:s:u:n:S:R:M:"
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87 |
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88 | #ifdef __GNUC__
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89 | static __attribute__ ((noreturn)) void sighandler_alarm(
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90 | int sig __attribute__((__unused__)))
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91 | #else /* __GNUC__ */
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92 | static void sighandler_alarm(int sig)
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93 | #endif /* __GNUC__ */
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94 | {
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95 | fprintf(stderr, "ERROR: more than %d seconds no activity\n", ALARMTIME);
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96 | exit(1);
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97 | }
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98 |
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99 | int stop = 0;
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100 | #ifdef __GNUC__
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101 | static void sighandler_int(int sig __attribute__((__unused__)))
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102 | #else /* __GNUC__ */
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103 | static void sighandler_alarm(int sig)
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104 | #endif /* __GNUC__ */
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105 | {
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106 | alarm(2);
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107 | stop = 1;
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108 | }
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109 |
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110 | static const char *geturl(const char *url, struct Args *args)
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111 | {
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112 | static char buf[1000];
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113 | static char *Buffer = buf;
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114 | static char *Bufend = buf+sizeof(buf);
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115 |
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116 | if(strncmp("ntrip:", url, 6))
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117 | return "URL must start with 'ntrip:'.";
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118 | url += 6; /* skip ntrip: */
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119 |
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120 | if(*url != '@' && *url != '/')
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121 | {
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122 | /* scan for mountpoint */
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123 | args->data = Buffer;
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124 | while(*url && *url != '@' && *url != ';' &&*url != '/' && Buffer != Bufend)
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125 | *(Buffer++) = *(url++);
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126 | if(Buffer == args->data)
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127 | return "Mountpoint required.";
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128 | else if(Buffer >= Bufend-1)
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129 | return "Parsing buffer too short.";
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130 | *(Buffer++) = 0;
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131 | }
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132 |
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133 | if(*url == '/') /* username and password */
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134 | {
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135 | ++url;
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136 | args->user = Buffer;
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137 | while(*url && *url != '@' && *url != ';' && *url != ':' && Buffer != Bufend)
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138 | *(Buffer++) = *(url++);
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139 | if(Buffer == args->user)
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140 | return "Username cannot be empty.";
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141 | else if(Buffer >= Bufend-1)
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142 | return "Parsing buffer too short.";
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143 | *(Buffer++) = 0;
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144 |
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145 | if(*url == ':') ++url;
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146 |
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147 | args->password = Buffer;
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148 | while(*url && *url != '@' && *url != ';' && Buffer != Bufend)
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149 | *(Buffer++) = *(url++);
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150 | if(Buffer == args->password)
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151 | return "Password cannot be empty.";
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152 | else if(Buffer >= Bufend-1)
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153 | return "Parsing buffer too short.";
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154 | *(Buffer++) = 0;
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155 | }
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156 |
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157 | if(*url == '@') /* server */
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158 | {
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159 | ++url;
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160 | if(*url != '@' && *url != ':')
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161 | {
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162 | args->server = Buffer;
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163 | while(*url && *url != '@' && *url != ':' && *url != ';' && Buffer != Bufend)
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164 | *(Buffer++) = *(url++);
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165 | if(Buffer == args->server)
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166 | return "Servername cannot be empty.";
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167 | else if(Buffer >= Bufend-1)
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168 | return "Parsing buffer too short.";
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169 | *(Buffer++) = 0;
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170 | }
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171 |
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172 | if(*url == ':')
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173 | {
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174 | ++url;
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175 | args->port = Buffer;
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176 | while(*url && *url != '@' && *url != ';' && Buffer != Bufend)
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177 | *(Buffer++) = *(url++);
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178 | if(Buffer == args->port)
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179 | return "Port cannot be empty.";
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180 | else if(Buffer >= Bufend-1)
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181 | return "Parsing buffer too short.";
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182 | *(Buffer++) = 0;
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183 | }
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184 |
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185 | if(*url == '@') /* proxy */
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186 | {
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187 | ++url;
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188 | args->proxyhost = Buffer;
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189 | while(*url && *url != ':' && *url != ';' && Buffer != Bufend)
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190 | *(Buffer++) = *(url++);
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191 | if(Buffer == args->proxyhost)
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192 | return "Proxy servername cannot be empty.";
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193 | else if(Buffer >= Bufend-1)
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194 | return "Parsing buffer too short.";
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195 | *(Buffer++) = 0;
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196 |
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197 | if(*url == ':')
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198 | {
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199 | ++url;
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200 | args->proxyport = Buffer;
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201 | while(*url && *url != ';' && Buffer != Bufend)
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202 | *(Buffer++) = *(url++);
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203 | if(Buffer == args->proxyport)
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204 | return "Proxy port cannot be empty.";
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205 | else if(Buffer >= Bufend-1)
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206 | return "Parsing buffer too short.";
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207 | *(Buffer++) = 0;
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208 | }
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209 | }
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210 | }
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211 | if(*url == ';') /* NMEA */
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212 | {
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213 | args->nmea = ++url;
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214 | while(*url)
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215 | ++url;
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216 | }
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217 |
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218 | return *url ? "Garbage at end of server string." : 0;
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219 | }
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220 |
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221 | static int getargs(int argc, char **argv, struct Args *args)
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222 | {
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223 | int res = 1;
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224 | int getoptr;
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225 | char *a;
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226 | int i = 0, help = 0;
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227 |
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228 | args->server = "www.euref-ip.net";
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229 | args->port = "2101";
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230 | args->user = "";
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231 | args->password = "";
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232 | args->nmea = 0;
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233 | args->data = 0;
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234 | args->bitrate = 0;
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235 | args->proxyhost = 0;
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236 | args->proxyport = "2101";
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237 | args->mode = AUTO;
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238 | help = 0;
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239 |
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240 | do
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241 | {
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242 | #ifdef NO_LONG_OPTS
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243 | switch((getoptr = getopt(argc, argv, ARGOPT)))
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244 | #else
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245 | switch((getoptr = getopt_long(argc, argv, ARGOPT, opts, 0)))
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246 | #endif
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247 | {
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248 | case 's': args->server = optarg; break;
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249 | case 'u': args->user = optarg; break;
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250 | case 'p': args->password = optarg; break;
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251 | case 'd': args->data = optarg; break;
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252 | case 'n': args->nmea = optarg; break;
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253 | case 'b': args->bitrate = 1; break;
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254 | case 'h': help=1; break;
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255 | case 'r': args->port = optarg; break;
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256 | case 'S': args->proxyhost = optarg; break;
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257 | case 'R': args->proxyport = optarg; break;
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258 | case 'M':
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259 | args->mode = 0;
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260 | if (!strcmp(optarg,"n") || !strcmp(optarg,"ntrip1"))
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261 | args->mode = NTRIP1;
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262 | else if(!strcmp(optarg,"h") || !strcmp(optarg,"http"))
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263 | args->mode = HTTP;
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264 | else if(!strcmp(optarg,"r") || !strcmp(optarg,"rtsp"))
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265 | args->mode = RTSP;
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266 | else if(!strcmp(optarg,"a") || !strcmp(optarg,"auto"))
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267 | args->mode = AUTO;
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268 | else args->mode = atoi(optarg);
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269 | if((args->mode == 0) || (args->mode >= END))
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270 | {
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271 | fprintf(stderr, "Mode %s unknown\n", optarg);
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272 | res = 0;
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273 | }
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274 | break;
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275 | case 1:
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276 | {
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277 | const char *err;
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278 | if((err = geturl(optarg, args)))
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279 | {
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280 | fprintf(stderr, "%s\n\n", err);
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281 | res = 0;
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282 | }
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283 | }
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284 | break;
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285 | case -1: break;
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286 | }
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287 | } while(getoptr != -1 && res);
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288 |
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289 | for(a = revisionstr+11; *a && *a != ' '; ++a)
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290 | revisionstr[i++] = *a;
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291 | revisionstr[i] = 0;
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292 | datestr[0] = datestr[7];
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293 | datestr[1] = datestr[8];
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294 | datestr[2] = datestr[9];
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295 | datestr[3] = datestr[10];
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296 | datestr[5] = datestr[12];
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297 | datestr[6] = datestr[13];
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298 | datestr[8] = datestr[15];
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299 | datestr[9] = datestr[16];
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300 | datestr[4] = datestr[7] = '-';
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301 | datestr[10] = 0;
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302 |
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303 | if(!res || help)
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304 | {
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305 | fprintf(stderr, "Version %s (%s) GPL" COMPILEDATE "\nUsage:\n%s -s server -u user ...\n"
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306 | " -d " LONG_OPT("--data ") "the requested data set\n"
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307 | " -s " LONG_OPT("--server ") "the server name or address\n"
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308 | " -p " LONG_OPT("--password ") "the login password\n"
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309 | " -r " LONG_OPT("--port ") "the server port number (default 2101)\n"
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310 | " -u " LONG_OPT("--user ") "the user name\n"
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311 | " -n " LONG_OPT("--nmea ") "NMEA string for sending to server\n"
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312 | " -b " LONG_OPT("--bitrate ") "output bitrate\n"
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313 | " -S " LONG_OPT("--proxyhost ") "proxy name or address\n"
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314 | " -R " LONG_OPT("--proxyport ") "proxy port, optional (default 2101)\n"
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315 | " -M " LONG_OPT("--mode ") "mode for data request\n"
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316 | " Valid modes are:\n"
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317 | " 1, h, http NTRIP Version 2.0 Caster in TCP/IP mode\n"
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318 | " 2, r, rtsp NTRIP Version 2.0 Caster in RTSP/RTP mode\n"
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319 | " 3, n, ntrip1 NTRIP Version 1.0 Caster\n"
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320 | " 4, a, auto automatic detection (default)\n"
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321 | "or using an URL:\n%s ntrip:data[/user[:password]][@[server][:port][@proxyhost[:proxyport]]][;nmea]\n"
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322 | , revisionstr, datestr, argv[0], argv[0]);
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323 | exit(1);
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324 | }
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325 | return res;
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326 | }
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327 |
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328 | static const char encodingTable [64] = {
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329 | 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
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330 | 'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
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331 | 'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
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332 | 'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'
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333 | };
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334 |
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335 | /* does not buffer overrun, but breaks directly after an error */
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336 | /* returns the number of required bytes */
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337 | static int encode(char *buf, int size, const char *user, const char *pwd)
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338 | {
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339 | unsigned char inbuf[3];
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340 | char *out = buf;
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341 | int i, sep = 0, fill = 0, bytes = 0;
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342 |
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343 | while(*user || *pwd)
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344 | {
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345 | i = 0;
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346 | while(i < 3 && *user) inbuf[i++] = *(user++);
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347 | if(i < 3 && !sep) {inbuf[i++] = ':'; ++sep; }
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348 | while(i < 3 && *pwd) inbuf[i++] = *(pwd++);
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349 | while(i < 3) {inbuf[i++] = 0; ++fill; }
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350 | if(out-buf < size-1)
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351 | *(out++) = encodingTable[(inbuf [0] & 0xFC) >> 2];
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352 | if(out-buf < size-1)
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353 | *(out++) = encodingTable[((inbuf [0] & 0x03) << 4)
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354 | | ((inbuf [1] & 0xF0) >> 4)];
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355 | if(out-buf < size-1)
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356 | {
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357 | if(fill == 2)
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358 | *(out++) = '=';
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359 | else
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360 | *(out++) = encodingTable[((inbuf [1] & 0x0F) << 2)
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361 | | ((inbuf [2] & 0xC0) >> 6)];
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362 | }
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363 | if(out-buf < size-1)
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364 | {
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365 | if(fill >= 1)
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366 | *(out++) = '=';
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367 | else
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368 | *(out++) = encodingTable[inbuf [2] & 0x3F];
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369 | }
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370 | bytes += 4;
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371 | }
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372 | if(out-buf < size)
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373 | *out = 0;
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374 | return bytes;
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375 | }
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376 |
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377 | int main(int argc, char **argv)
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378 | {
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379 | struct Args args;
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380 |
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381 | setbuf(stdout, 0);
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382 | setbuf(stdin, 0);
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383 | setbuf(stderr, 0);
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384 | signal(SIGALRM,sighandler_alarm);
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385 | signal(SIGINT,sighandler_int);
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386 | alarm(ALARMTIME);
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387 |
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388 | if(getargs(argc, argv, &args))
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389 | {
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390 | int sleeptime = 0;
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391 |
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392 | do
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393 | {
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394 | int sockfd, numbytes;
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395 | char buf[MAXDATASIZE];
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396 | struct sockaddr_in their_addr; /* connector's address information */
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397 | struct hostent *he;
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398 | struct servent *se;
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399 | const char *server, *port, *proxyserver = 0;
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400 | char proxyport[6];
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401 | char *b;
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402 | long i;
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403 | if(sleeptime)
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404 | {
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405 | sleep(sleeptime);
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406 | sleeptime += 2;
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407 | }
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408 | else
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409 | {
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410 | sleeptime = 1;
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411 | }
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412 | alarm(ALARMTIME);
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413 | if(args.proxyhost)
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414 | {
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415 | int p;
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416 | if((i = strtol(args.port, &b, 10)) && (!b || !*b))
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417 | p = i;
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418 | else if(!(se = getservbyname(args.port, 0)))
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419 | {
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420 | fprintf(stderr, "Can't resolve port %s.", args.port);
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421 | exit(1);
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422 | }
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423 | else
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424 | {
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425 | p = ntohs(se->s_port);
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426 | }
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427 | snprintf(proxyport, sizeof(proxyport), "%d", p);
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428 | port = args.proxyport;
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429 | proxyserver = args.server;
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430 | server = args.proxyhost;
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431 | }
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432 | else
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433 | {
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434 | server = args.server;
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435 | port = args.port;
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436 | }
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437 |
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438 | memset(&their_addr, 0, sizeof(struct sockaddr_in));
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439 | if((i = strtol(port, &b, 10)) && (!b || !*b))
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440 | their_addr.sin_port = htons(i);
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441 | else if(!(se = getservbyname(port, 0)))
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442 | {
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443 | fprintf(stderr, "Can't resolve port %s.", port);
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444 | exit(1);
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445 | }
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446 | else
|
---|
447 | {
|
---|
448 | their_addr.sin_port = se->s_port;
|
---|
449 | }
|
---|
450 | if(!(he=gethostbyname(server)))
|
---|
451 | {
|
---|
452 | fprintf(stderr, "Server name lookup failed for '%s'.\n", server);
|
---|
453 | exit(1);
|
---|
454 | }
|
---|
455 | if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
|
---|
456 | {
|
---|
457 | perror("socket");
|
---|
458 | exit(1);
|
---|
459 | }
|
---|
460 | their_addr.sin_family = AF_INET;
|
---|
461 | their_addr.sin_addr = *((struct in_addr *)he->h_addr);
|
---|
462 |
|
---|
463 | if(args.data && args.mode == RTSP)
|
---|
464 | {
|
---|
465 | struct sockaddr_in local;
|
---|
466 | int sockudp, localport;
|
---|
467 | int cseq = 1;
|
---|
468 | socklen_t len;
|
---|
469 |
|
---|
470 | if((sockudp = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
|
---|
471 | {
|
---|
472 | perror("socket");
|
---|
473 | exit(1);
|
---|
474 | }
|
---|
475 | /* fill structure with local address information for UDP */
|
---|
476 | memset(&local, 0, sizeof(local));
|
---|
477 | local.sin_family = AF_INET;
|
---|
478 | local.sin_port = htons(0);
|
---|
479 | local.sin_addr.s_addr = htonl(INADDR_ANY);
|
---|
480 | len = sizeof(local);
|
---|
481 | /* bind() in order to get a random RTP client_port */
|
---|
482 | if((bind(sockudp, (struct sockaddr *)&local, len)) < 0)
|
---|
483 | {
|
---|
484 | perror("bind");
|
---|
485 | exit(1);
|
---|
486 | }
|
---|
487 | if((getsockname(sockudp, (struct sockaddr*)&local, &len)) != -1)
|
---|
488 | {
|
---|
489 | localport = ntohs(local.sin_port);
|
---|
490 | }
|
---|
491 | else
|
---|
492 | {
|
---|
493 | perror("local access failed");
|
---|
494 | exit(1);
|
---|
495 | }
|
---|
496 | if(connect(sockfd, (struct sockaddr *)&their_addr,
|
---|
497 | sizeof(struct sockaddr)) == -1)
|
---|
498 | {
|
---|
499 | perror("connect");
|
---|
500 | exit(1);
|
---|
501 | }
|
---|
502 | i=snprintf(buf, MAXDATASIZE-40, /* leave some space for login */
|
---|
503 | "SETUP rtsp://%s%s%s/%s RTSP/1.0\r\n"
|
---|
504 | "CSeq: %d\r\n"
|
---|
505 | "Ntrip-Version: Ntrip/2.0\r\n"
|
---|
506 | "Ntrip-Component: Ntripclient\r\n"
|
---|
507 | "User-Agent: %s/%s\r\n"
|
---|
508 | "Transport: RTP/GNSS;unicast;client_port=%u\r\n"
|
---|
509 | "Authorization: Basic ",
|
---|
510 | args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
|
---|
511 | args.data, cseq++, AGENTSTRING, revisionstr, localport);
|
---|
512 | if(i > MAXDATASIZE-40 || i < 0) /* second check for old glibc */
|
---|
513 | {
|
---|
514 | fprintf(stderr, "Requested data too long\n");
|
---|
515 | exit(1);
|
---|
516 | }
|
---|
517 | i += encode(buf+i, MAXDATASIZE-i-4, args.user, args.password);
|
---|
518 | if(i > MAXDATASIZE-4)
|
---|
519 | {
|
---|
520 | fprintf(stderr, "Username and/or password too long\n");
|
---|
521 | exit(1);
|
---|
522 | }
|
---|
523 | buf[i++] = '\r';
|
---|
524 | buf[i++] = '\n';
|
---|
525 | buf[i++] = '\r';
|
---|
526 | buf[i++] = '\n';
|
---|
527 | if(args.nmea)
|
---|
528 | {
|
---|
529 | int j = snprintf(buf+i, MAXDATASIZE-i, "%s\r\n", args.nmea);
|
---|
530 | if(j >= 0 && j < MAXDATASIZE-i)
|
---|
531 | i += j;
|
---|
532 | else
|
---|
533 | {
|
---|
534 | fprintf(stderr, "NMEA string too long\n");
|
---|
535 | exit(1);
|
---|
536 | }
|
---|
537 | }
|
---|
538 | if(send(sockfd, buf, (size_t)i, 0) != i)
|
---|
539 | {
|
---|
540 | perror("send");
|
---|
541 | exit(1);
|
---|
542 | }
|
---|
543 | if((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1)
|
---|
544 | {
|
---|
545 | if(numbytes >= 17 && !strncmp(buf, "RTSP/1.0 200 OK\r\n", 17))
|
---|
546 | {
|
---|
547 | int serverport = 0, session = 0;
|
---|
548 | const char *portcheck = "server_port=";
|
---|
549 | const char *sessioncheck = "session: ";
|
---|
550 | int l = strlen(portcheck)-1;
|
---|
551 | int j=0;
|
---|
552 | for(i = 0; j != l && i < numbytes-l; ++i)
|
---|
553 | {
|
---|
554 | for(j = 0; j < l && tolower(buf[i+j]) == portcheck[j]; ++j)
|
---|
555 | ;
|
---|
556 | }
|
---|
557 | if(i == numbytes-l)
|
---|
558 | {
|
---|
559 | fprintf(stderr, "No server port number found\n");
|
---|
560 | exit(1);
|
---|
561 | }
|
---|
562 | else
|
---|
563 | {
|
---|
564 | i+=l;
|
---|
565 | while(i < numbytes && buf[i] >= '0' && buf[i] <= '9')
|
---|
566 | serverport = serverport * 10 + buf[i++]-'0';
|
---|
567 | if(buf[i] != '\r' && buf[i] != ';')
|
---|
568 | {
|
---|
569 | fprintf(stderr, "Could not extract server port\n");
|
---|
570 | exit(1);
|
---|
571 | }
|
---|
572 | }
|
---|
573 | l = strlen(sessioncheck)-1;
|
---|
574 | j=0;
|
---|
575 | for(i = 0; j != l && i < numbytes-l; ++i)
|
---|
576 | {
|
---|
577 | for(j = 0; j < l && tolower(buf[i+j]) == sessioncheck[j]; ++j)
|
---|
578 | ;
|
---|
579 | }
|
---|
580 | if(i == numbytes-l)
|
---|
581 | {
|
---|
582 | fprintf(stderr, "No session number found\n");
|
---|
583 | exit(1);
|
---|
584 | }
|
---|
585 | else
|
---|
586 | {
|
---|
587 | i+=l;
|
---|
588 | while(i < numbytes && buf[i] >= '0' && buf[i] <= '9')
|
---|
589 | session = session * 10 + buf[i++]-'0';
|
---|
590 | if(buf[i] != '\r')
|
---|
591 | {
|
---|
592 | fprintf(stderr, "Could not extract session number\n");
|
---|
593 | exit(1);
|
---|
594 | }
|
---|
595 | }
|
---|
596 |
|
---|
597 | i = snprintf(buf, MAXDATASIZE,
|
---|
598 | "PLAY rtsp://%s%s%s/%s RTSP/1.0\r\n"
|
---|
599 | "CSeq: %d\r\n"
|
---|
600 | "Session: %d\r\n"
|
---|
601 | "\r\n",
|
---|
602 | args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
|
---|
603 | args.data, cseq++, session);
|
---|
604 |
|
---|
605 | if(i > MAXDATASIZE || i < 0) /* second check for old glibc */
|
---|
606 | {
|
---|
607 | fprintf(stderr, "Requested data too long\n");
|
---|
608 | exit(1);
|
---|
609 | }
|
---|
610 | if(send(sockfd, buf, (size_t)i, 0) != i)
|
---|
611 | {
|
---|
612 | perror("send");
|
---|
613 | exit(1);
|
---|
614 | }
|
---|
615 | if((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1)
|
---|
616 | {
|
---|
617 | if(numbytes >= 17 && !strncmp(buf, "RTSP/1.0 200 OK\r\n", 17))
|
---|
618 | {
|
---|
619 | struct sockaddr_in addrRTP;
|
---|
620 | /* fill structure with caster address information for UDP */
|
---|
621 | memset(&addrRTP, 0, sizeof(addrRTP));
|
---|
622 | addrRTP.sin_family = AF_INET;
|
---|
623 | addrRTP.sin_port = htons(serverport);
|
---|
624 | their_addr.sin_addr = *((struct in_addr *)he->h_addr);
|
---|
625 | len = sizeof(addrRTP);
|
---|
626 | int ts = 0;
|
---|
627 | int sn = 0;
|
---|
628 | int ssrc = 0;
|
---|
629 | int init = 0;
|
---|
630 | int u, v, w;
|
---|
631 | while(!stop && (i = recvfrom(sockudp, buf, 1526, 0,
|
---|
632 | (struct sockaddr*) &addrRTP, &len)) > 0)
|
---|
633 | {
|
---|
634 | alarm(ALARMTIME);
|
---|
635 | if(i >= 12+1 && (unsigned char)buf[0] == (2 << 6) && buf[1] == 0x60)
|
---|
636 | {
|
---|
637 | u= ((unsigned char)buf[2]<<8)+(unsigned char)buf[3];
|
---|
638 | v = ((unsigned char)buf[4]<<24)+((unsigned char)buf[5]<<16)
|
---|
639 | +((unsigned char)buf[6]<<8)+(unsigned char)buf[7];
|
---|
640 | w = ((unsigned char)buf[8]<<24)+((unsigned char)buf[9]<<16)
|
---|
641 | +((unsigned char)buf[10]<<8)+(unsigned char)buf[11];
|
---|
642 |
|
---|
643 | if(init)
|
---|
644 | {
|
---|
645 | if(u < -30000 && sn > 30000) sn -= 0xFFFF;
|
---|
646 | if(ssrc != w || ts > v)
|
---|
647 | {
|
---|
648 | fprintf(stderr, "Illegal UDP data received.\n");
|
---|
649 | exit(1);
|
---|
650 | }
|
---|
651 | if(u > sn) /* don't show out-of-order packets */
|
---|
652 | fwrite(buf+12, (size_t)i-12, 1, stdout);
|
---|
653 | }
|
---|
654 | sn = u; ts = v; ssrc = w; init = 1;
|
---|
655 | }
|
---|
656 | else
|
---|
657 | {
|
---|
658 | fprintf(stderr, "Illegal UDP header.\n");
|
---|
659 | exit(1);
|
---|
660 | }
|
---|
661 | }
|
---|
662 | }
|
---|
663 | i = snprintf(buf, MAXDATASIZE,
|
---|
664 | "TEARDOWN rtsp://%s%s%s/%s RTSP/1.0\r\n"
|
---|
665 | "CSeq: %d\r\n"
|
---|
666 | "Session: %d\r\n"
|
---|
667 | "\r\n",
|
---|
668 | args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
|
---|
669 | args.data, cseq++, session);
|
---|
670 |
|
---|
671 | if(i > MAXDATASIZE || i < 0) /* second check for old glibc */
|
---|
672 | {
|
---|
673 | fprintf(stderr, "Requested data too long\n");
|
---|
674 | exit(1);
|
---|
675 | }
|
---|
676 | if(send(sockfd, buf, (size_t)i, 0) != i)
|
---|
677 | {
|
---|
678 | perror("send");
|
---|
679 | exit(1);
|
---|
680 | }
|
---|
681 | }
|
---|
682 | else
|
---|
683 | {
|
---|
684 | fprintf(stderr, "Could not start data stream.\n");
|
---|
685 | exit(1);
|
---|
686 | }
|
---|
687 | }
|
---|
688 | else
|
---|
689 | {
|
---|
690 | fprintf(stderr, "Could not setup initial control connection.\n");
|
---|
691 | exit(1);
|
---|
692 | }
|
---|
693 | }
|
---|
694 | else
|
---|
695 | {
|
---|
696 | perror("recv");
|
---|
697 | exit(1);
|
---|
698 | }
|
---|
699 | }
|
---|
700 | else
|
---|
701 | {
|
---|
702 | if(connect(sockfd, (struct sockaddr *)&their_addr,
|
---|
703 | sizeof(struct sockaddr)) == -1)
|
---|
704 | {
|
---|
705 | perror("connect");
|
---|
706 | exit(1);
|
---|
707 | }
|
---|
708 | if(!args.data)
|
---|
709 | {
|
---|
710 | i = snprintf(buf, MAXDATASIZE,
|
---|
711 | "GET %s%s%s%s/ HTTP/1.0\r\n"
|
---|
712 | "Host: %s\r\n%s"
|
---|
713 | "User-Agent: %s/%s\r\n"
|
---|
714 | "\r\n"
|
---|
715 | , proxyserver ? "http://" : "", proxyserver ? proxyserver : "",
|
---|
716 | proxyserver ? ":" : "", proxyserver ? proxyport : "",
|
---|
717 | args.server, args.mode == NTRIP1 ? "" : "Ntrip-Version: Ntrip/2.0\r\n",
|
---|
718 | AGENTSTRING, revisionstr);
|
---|
719 | }
|
---|
720 | else
|
---|
721 | {
|
---|
722 | i=snprintf(buf, MAXDATASIZE-40, /* leave some space for login */
|
---|
723 | "GET %s%s%s%s/%s HTTP/1.0\r\n"
|
---|
724 | "Host: %s\r\n%s"
|
---|
725 | "User-Agent: %s/%s\r\n"
|
---|
726 | "Authorization: Basic "
|
---|
727 | , proxyserver ? "http://" : "", proxyserver ? proxyserver : "",
|
---|
728 | proxyserver ? ":" : "", proxyserver ? proxyport : "",
|
---|
729 | args.data, args.server,
|
---|
730 | args.mode == NTRIP1 ? "" : "Ntrip-Version: Ntrip/2.0\r\n",
|
---|
731 | AGENTSTRING, revisionstr);
|
---|
732 | if(i > MAXDATASIZE-40 || i < 0) /* second check for old glibc */
|
---|
733 | {
|
---|
734 | fprintf(stderr, "Requested data too long\n");
|
---|
735 | exit(1);
|
---|
736 | }
|
---|
737 | i += encode(buf+i, MAXDATASIZE-i-4, args.user, args.password);
|
---|
738 | if(i > MAXDATASIZE-4)
|
---|
739 | {
|
---|
740 | fprintf(stderr, "Username and/or password too long\n");
|
---|
741 | exit(1);
|
---|
742 | }
|
---|
743 | buf[i++] = '\r';
|
---|
744 | buf[i++] = '\n';
|
---|
745 | buf[i++] = '\r';
|
---|
746 | buf[i++] = '\n';
|
---|
747 | if(args.nmea)
|
---|
748 | {
|
---|
749 | int j = snprintf(buf+i, MAXDATASIZE-i, "%s\r\n", args.nmea);
|
---|
750 | if(j >= 0 && j < MAXDATASIZE-i)
|
---|
751 | i += j;
|
---|
752 | else
|
---|
753 | {
|
---|
754 | fprintf(stderr, "NMEA string too long\n");
|
---|
755 | exit(1);
|
---|
756 | }
|
---|
757 | }
|
---|
758 | }
|
---|
759 | if(send(sockfd, buf, (size_t)i, 0) != i)
|
---|
760 | {
|
---|
761 | perror("send");
|
---|
762 | exit(1);
|
---|
763 | }
|
---|
764 | if(args.data)
|
---|
765 | {
|
---|
766 | int k = 0;
|
---|
767 | int chunkymode = 0;
|
---|
768 | int starttime = time(0);
|
---|
769 | int lastout = starttime;
|
---|
770 | int totalbytes = 0;
|
---|
771 | int chunksize = 0;
|
---|
772 |
|
---|
773 | while(!stop && (numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1)
|
---|
774 | {
|
---|
775 | alarm(ALARMTIME);
|
---|
776 | if(!k)
|
---|
777 | {
|
---|
778 | if(numbytes > 17 && (!strncmp(buf, "HTTP/1.1 200 OK\r\n", 17)
|
---|
779 | || !strncmp(buf, "HTTP/1.0 200 OK\r\n", 17)))
|
---|
780 | {
|
---|
781 | const char *datacheck = "Content-Type: gnss/data\r\n";
|
---|
782 | const char *chunkycheck = "Transfer-Encoding: chunked\r\n";
|
---|
783 | int l = strlen(datacheck)-1;
|
---|
784 | int j=0;
|
---|
785 | for(i = 0; j != l && i < numbytes-l; ++i)
|
---|
786 | {
|
---|
787 | for(j = 0; j < l && buf[i+j] == datacheck[j]; ++j)
|
---|
788 | ;
|
---|
789 | }
|
---|
790 | if(i == numbytes-l)
|
---|
791 | {
|
---|
792 | fprintf(stderr, "No 'Content-Type: gnss/data' found\n");
|
---|
793 | exit(1);
|
---|
794 | }
|
---|
795 | l = strlen(chunkycheck)-1;
|
---|
796 | j=0;
|
---|
797 | for(i = 0; j != l && i < numbytes-l; ++i)
|
---|
798 | {
|
---|
799 | for(j = 0; j < l && buf[i+j] == chunkycheck[j]; ++j)
|
---|
800 | ;
|
---|
801 | }
|
---|
802 | if(i < numbytes-l)
|
---|
803 | chunkymode = 1;
|
---|
804 | }
|
---|
805 | else if(numbytes < 12 || strncmp("ICY 200 OK\r\n", buf, 12))
|
---|
806 | {
|
---|
807 | fprintf(stderr, "Could not get the requested data: ");
|
---|
808 | for(k = 0; k < numbytes && buf[k] != '\n' && buf[k] != '\r'; ++k)
|
---|
809 | {
|
---|
810 | fprintf(stderr, "%c", isprint(buf[k]) ? buf[k] : '.');
|
---|
811 | }
|
---|
812 | fprintf(stderr, "\n");
|
---|
813 | exit(1);
|
---|
814 | }
|
---|
815 | else if(args.mode != NTRIP1)
|
---|
816 | {
|
---|
817 | fprintf(stderr, "NTRIP version 2 HTTP connection failed%s.\n",
|
---|
818 | args.mode == AUTO ? ", falling back to NTRIP1" : "");
|
---|
819 | if(args.mode == HTTP)
|
---|
820 | exit(1);
|
---|
821 | }
|
---|
822 | ++k;
|
---|
823 | }
|
---|
824 | else
|
---|
825 | {
|
---|
826 | sleeptime = 0;
|
---|
827 | if(chunkymode)
|
---|
828 | {
|
---|
829 | int stop = 0;
|
---|
830 | int pos = 0;
|
---|
831 | while(!stop && pos < numbytes)
|
---|
832 | {
|
---|
833 | switch(chunkymode)
|
---|
834 | {
|
---|
835 | case 1: /* reading number starts */
|
---|
836 | chunksize = 0;
|
---|
837 | ++chunkymode; /* no break */
|
---|
838 | case 2: /* during reading number */
|
---|
839 | i = buf[pos++];
|
---|
840 | if(i >= '0' && i <= '9') chunksize = chunksize*16+i-'0';
|
---|
841 | else if(i >= 'a' && i <= 'f') chunksize = chunksize*16+i-'a'+10;
|
---|
842 | else if(i >= 'A' && i <= 'F') chunksize = chunksize*16+i-'A'+10;
|
---|
843 | else if(i == '\r') ++chunkymode;
|
---|
844 | else stop = 1;
|
---|
845 | break;
|
---|
846 | case 3: /* scanning for return */
|
---|
847 | if(buf[pos++] == '\n') chunkymode = chunksize ? 4 : 1;
|
---|
848 | else stop = 1;
|
---|
849 | break;
|
---|
850 | case 4: /* output data */
|
---|
851 | i = numbytes-pos;
|
---|
852 | if(i > chunksize) i = chunksize;
|
---|
853 | fwrite(buf+pos, (size_t)i, 1, stdout);
|
---|
854 | totalbytes += i;
|
---|
855 | chunksize -= i;
|
---|
856 | pos += i;
|
---|
857 | if(!chunksize)
|
---|
858 | chunkymode = 1;
|
---|
859 | break;
|
---|
860 | }
|
---|
861 | }
|
---|
862 | if(stop)
|
---|
863 | {
|
---|
864 | fprintf(stderr, "Error in chunky transfer encoding\n");
|
---|
865 | break;
|
---|
866 | }
|
---|
867 | }
|
---|
868 | else
|
---|
869 | {
|
---|
870 | totalbytes += numbytes;
|
---|
871 | fwrite(buf, (size_t)numbytes, 1, stdout);
|
---|
872 | }
|
---|
873 | fflush(stdout);
|
---|
874 | if(totalbytes < 0) /* overflow */
|
---|
875 | {
|
---|
876 | totalbytes = 0;
|
---|
877 | starttime = time(0);
|
---|
878 | lastout = starttime;
|
---|
879 | }
|
---|
880 | if(args.bitrate)
|
---|
881 | {
|
---|
882 | int t = time(0);
|
---|
883 | if(t > lastout + 60)
|
---|
884 | {
|
---|
885 | lastout = t;
|
---|
886 | fprintf(stderr, "Bitrate is %dbyte/s (%d seconds accumulated).\n",
|
---|
887 | totalbytes/(t-starttime), t-starttime);
|
---|
888 | }
|
---|
889 | }
|
---|
890 | }
|
---|
891 | }
|
---|
892 | }
|
---|
893 | else
|
---|
894 | {
|
---|
895 | sleeptime = 0;
|
---|
896 | while(!stop && (numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) > 0)
|
---|
897 | {
|
---|
898 | alarm(ALARMTIME);
|
---|
899 | fwrite(buf, (size_t)numbytes, 1, stdout);
|
---|
900 | }
|
---|
901 | }
|
---|
902 | close(sockfd);
|
---|
903 | }
|
---|
904 | } while(args.data && !stop);
|
---|
905 | }
|
---|
906 | return 0;
|
---|
907 | }
|
---|