1 | /*
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2 | * NtripServerLinux.c
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3 | *
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4 | * Copyright (c) 2003...2005
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5 | * German Federal Agency for Cartography and Geodesy (BKG)
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6 | *
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7 | * Developed for Networked Transport of RTCM via Internet Protocol (NTRIP)
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8 | * for streaming GNSS data over the Internet.
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9 | *
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10 | * Designed by Informatik Centrum Dortmund http://www.icd.de
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11 | *
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12 | * NTRIP is currently an experimental technology.
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13 | * The BKG disclaims any liability nor responsibility to any person or
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14 | * entity with respect to any loss or damage caused, or alleged to be
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15 | * caused, directly or indirectly by the use and application of the NTRIP
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16 | * technology.
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17 | *
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18 | * For latest information and updates, access:
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19 | * http://igs.ifag.de/index_ntrip.htm
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20 | *
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21 | * Georg Weber
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22 | * BKG, Frankfurt, Germany, June 2003-06-13
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23 | * E-mail: euref-ip@bkg.bund.de
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24 | *
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25 | * Based on the GNU General Public License published nmead
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26 | *
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27 | * This program is free software; you can redistribute it and/or
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28 | * modify it under the terms of the GNU General Public License
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29 | * as published by the Free Software Foundation; either version 2
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30 | * of the License, or (at your option) any later version.
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31 | *
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32 | * This program is distributed in the hope that it will be useful,
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33 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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34 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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35 | * GNU General Public License for more details.
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36 | *
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37 | * You should have received a copy of the GNU General Public License
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38 | * along with this program; if not, write to the Free Software
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39 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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40 | * USA.
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41 | */
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42 |
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43 | /* $Id: NtripLinuxServer.c,v 1.23 2006/08/16 08:33:04 stoecker Exp $
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44 | * Changes - Version 0.7
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45 | * Sep 22 2003 Steffen Tschirpke <St.Tschirpke@actina.de>
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46 | * - socket support
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47 | * - command line option handling
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48 | * - error handling
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49 | * - help screen
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50 | *
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51 | * Changes - Version 0.9
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52 | * Feb 15 2005 Dirk Stoecker <soft@dstoecker.de>
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53 | * - some minor updates, fixed serial baudrate settings
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54 | *
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55 | * Changes - Version 0.10
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56 | * Apr 05 2005 Dirk Stoecker <soft@dstoecker.de>
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57 | * - some cleanup and miscellaneous fixes
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58 | * - replaced non-working simulate with file input (stdin)
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59 | * - TCP sending now somewhat more stable
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60 | * - cleanup of error handling
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61 | * - Modes may be symbolic and not only numeric
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62 | *
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63 | * Changes - Version 0.11
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64 | * Jun 02 2005 Dirk Stoecker <soft@dstoecker.de>
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65 | * - added SISNeT support
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66 | * - added UDP support
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67 | * - cleanup of host and port handling
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68 | * - added inactivity alarm of 60 seconds
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69 | *
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70 | * Changes - Version 0.12
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71 | * Jun 07 2005 Dirk Stoecker <soft@dstoecker.de>
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72 | * - added UDP bindmode
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73 | *
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74 | * Changes - Version 0.13
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75 | * Apr 25 2006 Andrea Stuerze <andrea.stuerze@bkg.bund.de>
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76 | * - added stream retrieval from caster
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77 | *
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78 | * Changes - Version 0.14
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79 | * May 16 2006 Andrea Stuerze <andrea.stuerze@bkg.bund.de>
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80 | * - bug fix in base64_encode-function
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81 | *
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82 | * Changes - Version 0.15
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83 | * Jun 02 2006 Georg Weber <georg.weber@bkg.bund.de>
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84 | * - modification for SISNeT 3.1 protocol
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85 | *
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86 | * Changes - Version 0.16
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87 | * Jul 06 2006 Andrea Stuerze <andrea.stuerze@bkg.bund.de>
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88 | * - more flexible caster's response
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89 | *
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90 | * Changes - Version 0.17
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91 | * Jul 27 2006 Dirk Stoecker <soft@dstoecker.de>
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92 | * - fixed some problems with caster download
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93 | * - some minor cosmetic changes
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94 | *
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95 | * Changes - Version 0.18
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96 | * Nov 23 2006 Dirk Stoecker <soft@dstoecker.de>
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97 | * - default port changed from 80 to 2101
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98 | *
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99 | */
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100 |
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101 | #include <ctype.h>
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102 | #include <errno.h>
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103 | #include <fcntl.h>
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104 | #include <getopt.h>
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105 | #include <netdb.h>
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106 | #include <signal.h>
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107 | #include <stdio.h>
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108 | #include <stdlib.h>
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109 | #include <string.h>
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110 | #include <unistd.h>
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111 | #include <arpa/inet.h>
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112 | #include <netinet/in.h>
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113 | #include <sys/socket.h>
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114 | #include <sys/termios.h>
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115 | #include <sys/types.h>
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116 |
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117 | #ifndef MSG_DONTWAIT
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118 | #define MSG_DONTWAIT 0 /* prevent compiler errors */
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119 | #endif
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120 | #ifndef O_EXLOCK
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121 | #define O_EXLOCK 0 /* prevent compiler errors */
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122 | #endif
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123 |
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124 | enum MODE { SERIAL = 1, TCPSOCKET = 2, INFILE = 3, SISNET = 4, UDPSOCKET = 5,
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125 | CASTER = 6, LAST};
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126 |
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127 | #define VERSION "NTRIP NtripServerLinux/0.17"
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128 | #define BUFSZ 1024
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129 |
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130 | /* default socket source */
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131 | #define SERV_HOST_ADDR "localhost"
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132 | #define SERV_TCP_PORT 2101
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133 |
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134 | /* default destination */
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135 | #define NTRIP_CASTER "www.euref-ip.net"
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136 | #define NTRIP_PORT 2101
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137 |
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138 | /* default sisnet source */
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139 | #define SISNET_SERVER "131.176.49.142"
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140 | #define SISNET_PORT 7777
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141 |
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142 | #define ALARMTIME 60
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143 |
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144 | static int ttybaud = 19200;
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145 | static const char *ttyport = "/dev/gps";
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146 | static const char *filepath = "/dev/stdin";
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147 | static enum MODE mode = INFILE;
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148 | static int sisnet = 31;
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149 | static int gpsfd = -1;
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150 |
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151 | /* Forward references */
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152 | static int openserial(const char * tty, int blocksz, int baud);
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153 | static void send_receive_loop(int sock, int fd);
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154 | static void usage(int);
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155 | static int encode(char *buf, int size, const char *user, const char *pwd);
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156 |
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157 | #ifdef __GNUC__
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158 | static __attribute__ ((noreturn)) void sighandler_alarm(
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159 | int sig __attribute__((__unused__)))
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160 | #else /* __GNUC__ */
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161 | static void sighandler_alarm(int sig)
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162 | #endif /* __GNUC__ */
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163 | {
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164 | fprintf(stderr, "ERROR: more than %d seconds no activity\n", ALARMTIME);
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165 | exit(1);
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166 | }
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167 |
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168 | /*
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169 | * main
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170 | *
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171 | * Main entry point for the program. Processes command-line arguments and
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172 | * prepares for action.
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173 | *
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174 | * Parameters:
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175 | * argc : integer : Number of command-line arguments.
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176 | * argv : array of char : Command-line arguments as an array of
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177 | * zero-terminated pointers to strings.
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178 | *
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179 | * Return Value:
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180 | * The function does not return a value (although its return type is int).
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181 | *
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182 | * Remarks:
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183 | *
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184 | */
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185 |
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186 | int main(int argc, char **argv)
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187 | {
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188 | int c;
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189 | int size = 2048; /* for setting send buffer size */
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190 |
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191 | const char *inhost = 0;
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192 | const char *outhost = 0;
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193 | unsigned int outport = 0;
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194 | unsigned int inport = 0;
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195 | const char *mountpoint = NULL;
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196 | const char *password = "";
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197 | const char *sisnetpassword = "";
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198 | const char *sisnetuser = "";
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199 |
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200 | const char *stream_name=0;
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201 | const char *stream_user=0;
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202 | const char *stream_password=0;
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203 |
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204 | const char *initfile = NULL;
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205 | int bindmode = 0;
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206 | int sock_id;
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207 | char szSendBuffer[BUFSZ];
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208 | int nBufferBytes;
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209 | struct hostent *he;
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210 | struct sockaddr_in addr;
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211 |
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212 | signal(SIGALRM,sighandler_alarm);
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213 | alarm(ALARMTIME);
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214 | /* get and check program arguments */
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215 | if(argc <= 1)
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216 | {
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217 | usage(2);
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218 | exit(1);
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219 | }
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220 | while((c = getopt(argc, argv, "M:i:h:b:p:s:a:m:c:H:P:f:l:u:V:D:U:W:B"))
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221 | != EOF)
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222 | {
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223 | switch (c)
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224 | {
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225 | case 'M':
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226 | if(!strcmp(optarg, "serial")) mode = SERIAL;
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227 | else if(!strcmp(optarg, "tcpsocket")) mode = TCPSOCKET;
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228 | else if(!strcmp(optarg, "file")) mode = INFILE;
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229 | else if(!strcmp(optarg, "sisnet")) mode = SISNET;
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230 | else if(!strcmp(optarg, "udpsocket")) mode = UDPSOCKET;
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231 | else if(!strcmp(optarg, "caster")) mode = CASTER;
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232 | else mode = atoi(optarg);
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233 | if((mode == 0) || (mode >= LAST))
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234 | {
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235 | fprintf(stderr, "ERROR: can't convert %s to a valid mode\n", optarg);
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236 | usage(-1);
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237 | }
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238 | break;
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239 | case 'i': /* gps serial ttyport */
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240 | ttyport = optarg;
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241 | break;
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242 | case 'B':
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243 | bindmode = 1;
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244 | break;
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245 | case 'V':
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246 | if(!strcmp("3.0", optarg)) sisnet = 30;
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247 | else if(!strcmp("3.1", optarg)) sisnet = 31;
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248 | else if(!strcmp("2.1", optarg)) sisnet = 21;
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249 | else
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250 | {
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251 | fprintf(stderr, "ERROR: unknown SISNeT version %s\n", optarg);
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252 | usage(-2);
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253 | }
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254 | break;
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255 | case 'b': /* serial ttyin speed */
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256 | ttybaud = atoi(optarg);
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257 | if(ttybaud <= 1)
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258 | {
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259 | fprintf(stderr, "ERROR: can't convert %s to valid serial speed\n",
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260 | optarg);
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261 | usage(1);
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262 | }
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263 | break;
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264 | case 'a': /* http server IP address A.B.C.D */
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265 | outhost = optarg;
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266 | break;
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267 | case 'p': /* http server port */
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268 | outport = atoi(optarg);
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269 | if(outport <= 1 || outport > 65535)
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270 | {
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271 | fprintf(stderr,
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272 | "ERROR: can't convert %s to a valid HTTP server port\n", optarg);
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273 | usage(1);
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274 | }
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275 | break;
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276 | case 'm': /* http server mountpoint */
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277 | mountpoint = optarg;
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278 | break;
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279 | case 's': /* datastream from file */
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280 | filepath = optarg;
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281 | break;
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282 | case 'f':
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283 | initfile = optarg;
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284 | break;
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285 | case 'u':
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286 | sisnetuser = optarg;
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287 | break;
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288 | case 'l':
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289 | sisnetpassword = optarg;
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290 | break;
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291 | case 'c': /* password */
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292 | password = optarg;
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293 | break;
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294 | case 'H': /* host */
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295 | inhost = optarg;
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296 | break;
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297 | case 'P': /* port */
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298 | inport = atoi(optarg);
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299 | if(inport <= 1 || inport > 65535)
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300 | {
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301 | fprintf(stderr, "ERROR: can't convert %s to a valid port number\n",
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302 | optarg);
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303 | usage(1);
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304 | }
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305 | break;
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306 | case 'D':
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307 | stream_name=optarg; /* desired stream from SourceCaster */
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308 | break;
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309 | case 'U':
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310 | stream_user=optarg; /* username for desired stream */
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311 | break;
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312 | case 'W':
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313 | stream_password=optarg; /* passwd for desired stream */
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314 | break;
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315 | case 'h': /* help */
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316 | case '?':
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317 | usage(0);
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318 | break;
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319 | default:
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320 | usage(2);
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321 | break;
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322 | }
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323 | }
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324 |
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325 | argc -= optind;
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326 | argv += optind;
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327 |
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328 | if(argc > 0)
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329 | {
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330 | fprintf(stderr, "ERROR: Extra args on command line: ");
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331 | for(; argc > 0; argc--)
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332 | {
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333 | fprintf(stderr, " %s", *argv++);
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334 | }
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335 | fprintf(stderr, "\n");
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336 | usage(1); /* never returns */
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337 | }
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338 |
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339 | if(mountpoint == NULL)
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340 | {
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341 | fprintf(stderr, "ERROR: Missing mountpoint argument\n");
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342 | exit(1);
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343 | }
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344 | if(!password[0])
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345 | {
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346 | fprintf(stderr,
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347 | "WARNING: Missing password argument - are you really sure?\n");
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348 | }
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349 |
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350 | if(stream_name && stream_user && !stream_password)
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351 | {
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352 | fprintf(stderr, "WARNING: Missing password argument for download"
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353 | " - are you really sure?\n");
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354 | }
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355 |
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356 | if(!outhost) outhost = NTRIP_CASTER;
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357 | if(!outport) outport = NTRIP_PORT;
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358 |
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359 | switch(mode)
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360 | {
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361 | case INFILE:
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362 | {
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363 | if((gpsfd = open(filepath, O_RDONLY)) < 0)
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364 | {
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365 | perror("ERROR: opening input file");
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366 | exit(1);
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367 | }
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368 | /* set blocking mode in case it was not set
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369 | (seems to be sometimes for fifo's) */
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370 | fcntl(gpsfd, F_SETFL, 0);
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371 | printf("file input: file = %s\n", filepath);
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372 | }
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373 | break;
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374 | case SERIAL: /* open serial port */
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375 | {
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376 | gpsfd = openserial(ttyport, 1, ttybaud);
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377 | if(gpsfd < 0)
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378 | {
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379 | exit(1);
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380 | }
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381 | printf("serial input: device = %s, speed = %d\n", ttyport, ttybaud);
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382 | }
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383 | break;
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384 | case TCPSOCKET: case UDPSOCKET: case SISNET: case CASTER:
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385 | {
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386 | if(mode == SISNET)
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387 | {
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388 | if(!inhost) inhost = SISNET_SERVER;
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389 | if(!inport) inport = SISNET_PORT;
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390 | }
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391 | else if(mode == CASTER)
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392 | {
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393 | if(!inport) inport = NTRIP_PORT;
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394 | if(!inhost) inhost = NTRIP_CASTER;
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395 | }
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396 | else if((mode == TCPSOCKET) || (mode == UDPSOCKET))
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397 | {
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398 | if(!inport) inport = SERV_TCP_PORT;
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399 | if(!inhost) inhost = "127.0.0.1";
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400 | }
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401 |
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402 | if(!(he = gethostbyname(inhost)))
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403 | {
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404 | fprintf(stderr, "ERROR: host %s unknown\n", inhost);
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405 | usage(-2);
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406 | }
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407 |
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408 | if((gpsfd = socket(AF_INET, mode == UDPSOCKET
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409 | ? SOCK_DGRAM : SOCK_STREAM, 0)) < 0)
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410 | {
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411 | fprintf(stderr, "ERROR: can't create socket\n");
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412 | exit(1);
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413 | }
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414 |
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415 | memset((char *) &addr, 0x00, sizeof(addr));
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416 | if(!bindmode)
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417 | memcpy(&addr.sin_addr, he->h_addr, (size_t)he->h_length);
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418 | addr.sin_family = AF_INET;
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419 | addr.sin_port = htons(inport);
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420 |
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421 | printf("%s input: host = %s, port = %d, %s%s%s%s%s\n",
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422 | mode == CASTER ? "caster" : mode == SISNET ? "sisnet" :
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423 | mode == TCPSOCKET ? "tcp socket" : "udp socket",
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424 | bindmode ? "127.0.0.1" : inet_ntoa(addr.sin_addr),
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425 | inport, stream_name ? "stream = " : "", stream_name ? stream_name : "",
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426 | initfile ? ", initfile = " : "", initfile ? initfile : "",
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427 | bindmode ? "binding mode" : "");
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428 |
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429 | if(bindmode)
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430 | {
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431 | if(bind(gpsfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
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432 | {
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433 | fprintf(stderr, "ERROR: can't bind input to port %d\n", inport);
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434 | exit(1);
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435 | }
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436 | }
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437 | else if(connect(gpsfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
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438 | {
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439 | fprintf(stderr, "ERROR: can't connect input to %s at port %d\n",
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440 | inet_ntoa(addr.sin_addr), inport);
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441 | exit(1);
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442 | }
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443 |
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444 | if(stream_name) /* data stream from caster */
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445 | {
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446 | int init = 0;
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447 |
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448 | /* set socket buffer size */
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449 | setsockopt(gpsfd, SOL_SOCKET, SO_SNDBUF, (const char *) &size,
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450 | sizeof(const char *));
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451 | if(stream_user && stream_password)
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452 | {
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453 | /* leave some space for login */
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454 | nBufferBytes=snprintf(szSendBuffer, sizeof(szSendBuffer)-40,
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455 | "GET /%s HTTP/1.0\r\n"
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456 | "User-Agent: %s\r\n"
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457 | "Authorization: Basic ", stream_name, VERSION);
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458 | /* second check for old glibc */
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459 | if(nBufferBytes > (int)sizeof(szSendBuffer)-40 || nBufferBytes < 0)
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460 | {
|
---|
461 | fprintf(stderr, "Requested data too long\n");
|
---|
462 | exit(1);
|
---|
463 | }
|
---|
464 | nBufferBytes += encode(szSendBuffer+nBufferBytes,
|
---|
465 | sizeof(szSendBuffer)-nBufferBytes-5, stream_user, stream_password);
|
---|
466 | if(nBufferBytes > (int)sizeof(szSendBuffer)-5)
|
---|
467 | {
|
---|
468 | fprintf(stderr, "Username and/or password too long\n");
|
---|
469 | exit(1);
|
---|
470 | }
|
---|
471 | snprintf(szSendBuffer+nBufferBytes, 5, "\r\n\r\n");
|
---|
472 | nBufferBytes += 5;
|
---|
473 | }
|
---|
474 | else
|
---|
475 | {
|
---|
476 | nBufferBytes = snprintf(szSendBuffer, sizeof(szSendBuffer),
|
---|
477 | "GET /%s HTTP/1.0\r\n"
|
---|
478 | "User-Agent: %s\r\n"
|
---|
479 | "\r\n", stream_name, VERSION);
|
---|
480 | }
|
---|
481 | if((send(gpsfd, szSendBuffer, (size_t)nBufferBytes, 0))
|
---|
482 | != nBufferBytes)
|
---|
483 | {
|
---|
484 | fprintf(stderr, "ERROR: could not send to caster\n");
|
---|
485 | exit(1);
|
---|
486 | }
|
---|
487 | nBufferBytes = 0;
|
---|
488 | /* check caster's response */
|
---|
489 | while(!init && nBufferBytes < (int)sizeof(szSendBuffer)
|
---|
490 | && (nBufferBytes += recv(gpsfd, szSendBuffer,
|
---|
491 | sizeof(szSendBuffer)-nBufferBytes, 0)) > 0)
|
---|
492 | {
|
---|
493 | if(strstr(szSendBuffer, "\r\n"))
|
---|
494 | {
|
---|
495 | if(!strncmp(szSendBuffer, "ICY 200 OK\r\n", 10))
|
---|
496 | init = 1;
|
---|
497 | else
|
---|
498 | {
|
---|
499 | int k;
|
---|
500 | fprintf(stderr, "Could not get the requested data: ");
|
---|
501 | for(k = 0; k < nBufferBytes && szSendBuffer[k] != '\n'
|
---|
502 | && szSendBuffer[k] != '\r'; ++k)
|
---|
503 | {
|
---|
504 | fprintf(stderr, "%c", isprint(szSendBuffer[k])
|
---|
505 | ? szSendBuffer[k] : '.');
|
---|
506 | }
|
---|
507 | fprintf(stderr, "\n");
|
---|
508 | exit(1);
|
---|
509 | }
|
---|
510 | }
|
---|
511 | }
|
---|
512 | if(!init)
|
---|
513 | {
|
---|
514 | fprintf(stderr, "Could not init caster download.");
|
---|
515 | exit(1);
|
---|
516 | }
|
---|
517 | } /* end data stream from caster */
|
---|
518 |
|
---|
519 | if(initfile && mode != SISNET)
|
---|
520 | {
|
---|
521 | char buffer[1024];
|
---|
522 | FILE *fh;
|
---|
523 | int i;
|
---|
524 |
|
---|
525 | if((fh = fopen(initfile, "r")))
|
---|
526 | {
|
---|
527 | while((i = fread(buffer, 1, sizeof(buffer), fh)) > 0)
|
---|
528 | {
|
---|
529 | if((send(gpsfd, buffer, (size_t)i, 0)) != i)
|
---|
530 | {
|
---|
531 | perror("ERROR: sending init file");
|
---|
532 | exit(1);
|
---|
533 | }
|
---|
534 | }
|
---|
535 | if(i < 0)
|
---|
536 | {
|
---|
537 | perror("ERROR: reading init file");
|
---|
538 | exit(1);
|
---|
539 | }
|
---|
540 | fclose(fh);
|
---|
541 | }
|
---|
542 | else
|
---|
543 | {
|
---|
544 | fprintf(stderr, "ERROR: can't read init file %s\n", initfile);
|
---|
545 | exit(1);
|
---|
546 | }
|
---|
547 | }
|
---|
548 | }
|
---|
549 | if(mode == SISNET)
|
---|
550 | {
|
---|
551 | int i, j;
|
---|
552 | char buffer[1024];
|
---|
553 |
|
---|
554 | i = snprintf(buffer, sizeof(buffer), sisnet >= 30 ? "AUTH,%s,%s\r\n"
|
---|
555 | : "AUTH,%s,%s", sisnetuser, sisnetpassword);
|
---|
556 | if((send(gpsfd, buffer, (size_t)i, 0)) != i)
|
---|
557 | {
|
---|
558 | perror("ERROR: sending authentication");
|
---|
559 | exit(1);
|
---|
560 | }
|
---|
561 | i = sisnet >= 30 ? 7 : 5;
|
---|
562 | if((j = recv(gpsfd, buffer, i, 0)) != i && strncmp("*AUTH", buffer, 5))
|
---|
563 | {
|
---|
564 | fprintf(stderr, "ERROR: SISNeT connect failed:");
|
---|
565 | for(i = 0; i < j; ++i)
|
---|
566 | {
|
---|
567 | if(buffer[i] != '\r' && buffer[i] != '\n')
|
---|
568 | {
|
---|
569 | fprintf(stderr, "%c", isprint(buffer[i]) ? buffer[i] : '.');
|
---|
570 | }
|
---|
571 | }
|
---|
572 | fprintf(stderr, "\n");
|
---|
573 | exit(1);
|
---|
574 | }
|
---|
575 | if(sisnet >= 31)
|
---|
576 | {
|
---|
577 | if((send(gpsfd, "START\r\n", 7, 0)) != i)
|
---|
578 | {
|
---|
579 | perror("ERROR: sending start command");
|
---|
580 | exit(1);
|
---|
581 | }
|
---|
582 | }
|
---|
583 | }
|
---|
584 | break;
|
---|
585 | default:
|
---|
586 | usage(-1);
|
---|
587 | break;
|
---|
588 | }
|
---|
589 |
|
---|
590 | /* ----- main part ----- */
|
---|
591 | for(;;)
|
---|
592 | {
|
---|
593 | if(!(he = gethostbyname(outhost)))
|
---|
594 | {
|
---|
595 | fprintf(stderr, "ERROR: host %s unknown\n", outhost);
|
---|
596 | usage(-2);
|
---|
597 | }
|
---|
598 |
|
---|
599 | /* create socket */
|
---|
600 | if((sock_id = socket(AF_INET, SOCK_STREAM, 0)) < 0)
|
---|
601 | {
|
---|
602 | fprintf(stderr, "ERROR: could not create socket\n");
|
---|
603 | exit(2);
|
---|
604 | }
|
---|
605 |
|
---|
606 | memset((char *) &addr, 0x00, sizeof(addr));
|
---|
607 | memcpy(&addr.sin_addr, he->h_addr, (size_t)he->h_length);
|
---|
608 | addr.sin_family = AF_INET;
|
---|
609 | addr.sin_port = htons(outport);
|
---|
610 |
|
---|
611 | /* connect to caster */
|
---|
612 | fprintf(stderr, "caster output: host = %s, port = %d, mountpoint = %s\n",
|
---|
613 | inet_ntoa(addr.sin_addr), outport, mountpoint);
|
---|
614 | if(connect(sock_id, (struct sockaddr *) &addr, sizeof(addr)) < 0)
|
---|
615 | {
|
---|
616 | fprintf(stderr, "ERROR: can't connect output to %s at port %d\n",
|
---|
617 | inet_ntoa(addr.sin_addr), outport);
|
---|
618 | close(sock_id);
|
---|
619 | exit(3);
|
---|
620 | }
|
---|
621 |
|
---|
622 | /* set socket buffer size */
|
---|
623 | setsockopt(sock_id, SOL_SOCKET, SO_SNDBUF, (const char *) &size,
|
---|
624 | sizeof(const char *));
|
---|
625 | /* send message to caster */
|
---|
626 | szSendBuffer[0] = '\0';
|
---|
627 | sprintf(szSendBuffer, "SOURCE %s /%s\r\n", password, mountpoint);
|
---|
628 | strcat(szSendBuffer, "Source-Agent: ");
|
---|
629 | strcat(szSendBuffer, VERSION);
|
---|
630 | strcat(szSendBuffer, "\r\n");
|
---|
631 | strcat(szSendBuffer, "\r\n");
|
---|
632 | strcat(szSendBuffer, "\0");
|
---|
633 | nBufferBytes = strlen(szSendBuffer);
|
---|
634 | if((send(sock_id, szSendBuffer, (size_t)nBufferBytes, 0)) != nBufferBytes)
|
---|
635 | {
|
---|
636 | fprintf(stderr, "ERROR: could not send to caster\n");
|
---|
637 | break;
|
---|
638 | }
|
---|
639 | /* check caster's response */
|
---|
640 | nBufferBytes = recv(sock_id, szSendBuffer, sizeof(szSendBuffer), 0);
|
---|
641 | szSendBuffer[nBufferBytes] = '\0';
|
---|
642 | if(!strstr(szSendBuffer, "OK"))
|
---|
643 | {
|
---|
644 | char *a;
|
---|
645 | fprintf(stderr, "ERROR: caster's reply is not OK : ");
|
---|
646 | for(a = szSendBuffer; *a && *a != '\n' && *a != '\r'; ++a)
|
---|
647 | {
|
---|
648 | fprintf(stderr, "%.1s", isprint(*a) ? a : ".");
|
---|
649 | }
|
---|
650 | fprintf(stderr, "\n");
|
---|
651 | break;
|
---|
652 | }
|
---|
653 | printf("connection successfull\n");
|
---|
654 | send_receive_loop(sock_id, gpsfd);
|
---|
655 | }
|
---|
656 | close(sock_id);
|
---|
657 | sleep(5);
|
---|
658 | return 0;
|
---|
659 | }
|
---|
660 |
|
---|
661 | static void send_receive_loop(int sock, int fd)
|
---|
662 | {
|
---|
663 | int nodata = 0;
|
---|
664 | char buffer[BUFSZ] = { 0 };
|
---|
665 | char sisnetbackbuffer[200];
|
---|
666 | int nBufferBytes = 0;
|
---|
667 | /* data transmission */
|
---|
668 | printf("transfering data ...\n");
|
---|
669 | while(1)
|
---|
670 | {
|
---|
671 | if(!nodata) alarm(ALARMTIME);
|
---|
672 | else nodata = 0;
|
---|
673 |
|
---|
674 | if(!nBufferBytes)
|
---|
675 | {
|
---|
676 | if(mode == SISNET && sisnet <= 30)
|
---|
677 | {
|
---|
678 | int i;
|
---|
679 | /* a somewhat higher rate than 1 second to get really each block */
|
---|
680 | /* means we need to skip double blocks sometimes */
|
---|
681 | struct timeval tv = {0,700000};
|
---|
682 | select(0, 0, 0, 0, &tv);
|
---|
683 | memcpy(sisnetbackbuffer, buffer, sizeof(sisnetbackbuffer));
|
---|
684 | i = (sisnet >= 30 ? 5 : 3);
|
---|
685 | if((send(gpsfd, "MSG\r\n", i, 0)) != i)
|
---|
686 | {
|
---|
687 | perror("ERROR: sending data request");
|
---|
688 | exit(1);
|
---|
689 | }
|
---|
690 | }
|
---|
691 | /* receiving data */
|
---|
692 | nBufferBytes = read(fd, buffer, sizeof(buffer));
|
---|
693 | if(!nBufferBytes)
|
---|
694 | {
|
---|
695 | printf("WARNING: no data received from input\n");
|
---|
696 | sleep(3);
|
---|
697 | nodata = 1;
|
---|
698 | continue;
|
---|
699 | }
|
---|
700 | else if(nBufferBytes < 0)
|
---|
701 | {
|
---|
702 | perror("ERROR: reading input failed");
|
---|
703 | exit(1);
|
---|
704 | }
|
---|
705 | /* we can compare the whole buffer, as the additional bytes
|
---|
706 | remain unchanged */
|
---|
707 | if(mode == SISNET && sisnet <= 30 &&
|
---|
708 | !memcmp(sisnetbackbuffer, buffer, sizeof(sisnetbackbuffer)))
|
---|
709 | {
|
---|
710 | nBufferBytes = 0;
|
---|
711 | }
|
---|
712 | }
|
---|
713 | if(nBufferBytes)
|
---|
714 | {
|
---|
715 | int i;
|
---|
716 | /* send data */
|
---|
717 | if((i = send(sock, buffer, (size_t)nBufferBytes, MSG_DONTWAIT))
|
---|
718 | != nBufferBytes)
|
---|
719 | {
|
---|
720 | if(i < 0)
|
---|
721 | {
|
---|
722 | if(errno != EAGAIN)
|
---|
723 | {
|
---|
724 | perror("WARNING: could not send data - retry connection");
|
---|
725 | close(sock);
|
---|
726 | sleep(5);
|
---|
727 | return;
|
---|
728 | }
|
---|
729 | }
|
---|
730 | else if(i)
|
---|
731 | {
|
---|
732 | memmove(buffer, buffer+i, (size_t)(nBufferBytes-i));
|
---|
733 | nBufferBytes -= i;
|
---|
734 | }
|
---|
735 | }
|
---|
736 | else
|
---|
737 | {
|
---|
738 | nBufferBytes = 0;
|
---|
739 | }
|
---|
740 | }
|
---|
741 | }
|
---|
742 | }
|
---|
743 |
|
---|
744 | /*
|
---|
745 | * openserial
|
---|
746 | *
|
---|
747 | * Open the serial port with the given device name and configure it for
|
---|
748 | * reading NMEA data from a GPS receiver.
|
---|
749 | *
|
---|
750 | * Parameters:
|
---|
751 | * tty : pointer to : A zero-terminated string containing the device
|
---|
752 | * unsigned char name of the appropriate serial port.
|
---|
753 | * blocksz : integer : Block size for port I/O
|
---|
754 | * baud : integer : Baud rate for port I/O
|
---|
755 | *
|
---|
756 | * Return Value:
|
---|
757 | * The function returns a file descriptor for the opened port if successful.
|
---|
758 | * The function returns -1 in the event of an error.
|
---|
759 | *
|
---|
760 | * Remarks:
|
---|
761 | *
|
---|
762 | */
|
---|
763 |
|
---|
764 | static int openserial(const char * tty, int blocksz, int baud)
|
---|
765 | {
|
---|
766 | int fd;
|
---|
767 | struct termios termios;
|
---|
768 |
|
---|
769 | fd = open(tty, O_RDWR | O_NONBLOCK | O_EXLOCK);
|
---|
770 | if(fd < 0)
|
---|
771 | {
|
---|
772 | perror("ERROR: opening serial connection");
|
---|
773 | return (-1);
|
---|
774 | }
|
---|
775 | if(tcgetattr(fd, &termios) < 0)
|
---|
776 | {
|
---|
777 | perror("ERROR: get serial attributes");
|
---|
778 | return (-1);
|
---|
779 | }
|
---|
780 | termios.c_iflag = 0;
|
---|
781 | termios.c_oflag = 0; /* (ONLRET) */
|
---|
782 | termios.c_cflag = CS8 | CLOCAL | CREAD;
|
---|
783 | termios.c_lflag = 0;
|
---|
784 | {
|
---|
785 | int cnt;
|
---|
786 | for(cnt = 0; cnt < NCCS; cnt++)
|
---|
787 | termios.c_cc[cnt] = -1;
|
---|
788 | }
|
---|
789 | termios.c_cc[VMIN] = blocksz;
|
---|
790 | termios.c_cc[VTIME] = 2;
|
---|
791 |
|
---|
792 | #if (B4800 != 4800)
|
---|
793 | /*
|
---|
794 | * Not every system has speed settings equal to absolute speed value.
|
---|
795 | */
|
---|
796 |
|
---|
797 | switch (baud)
|
---|
798 | {
|
---|
799 | case 300:
|
---|
800 | baud = B300;
|
---|
801 | break;
|
---|
802 | case 1200:
|
---|
803 | baud = B1200;
|
---|
804 | break;
|
---|
805 | case 2400:
|
---|
806 | baud = B2400;
|
---|
807 | break;
|
---|
808 | case 4800:
|
---|
809 | baud = B4800;
|
---|
810 | break;
|
---|
811 | case 9600:
|
---|
812 | baud = B9600;
|
---|
813 | break;
|
---|
814 | case 19200:
|
---|
815 | baud = B19200;
|
---|
816 | break;
|
---|
817 | case 38400:
|
---|
818 | baud = B38400;
|
---|
819 | break;
|
---|
820 | #ifdef B57600
|
---|
821 | case 57600:
|
---|
822 | baud = B57600;
|
---|
823 | break;
|
---|
824 | #endif
|
---|
825 | #ifdef B115200
|
---|
826 | case 115200:
|
---|
827 | baud = B115200;
|
---|
828 | break;
|
---|
829 | #endif
|
---|
830 | #ifdef B230400
|
---|
831 | case 230400:
|
---|
832 | baud = B230400;
|
---|
833 | break;
|
---|
834 | #endif
|
---|
835 | default:
|
---|
836 | fprintf(stderr, "WARNING: Baud settings not useful, using 19200\n");
|
---|
837 | baud = B19200;
|
---|
838 | break;
|
---|
839 | }
|
---|
840 | #endif
|
---|
841 |
|
---|
842 | if(cfsetispeed(&termios, baud) != 0)
|
---|
843 | {
|
---|
844 | perror("ERROR: setting serial speed with cfsetispeed");
|
---|
845 | return (-1);
|
---|
846 | }
|
---|
847 | if(cfsetospeed(&termios, baud) != 0)
|
---|
848 | {
|
---|
849 | perror("ERROR: setting serial speed with cfsetospeed");
|
---|
850 | return (-1);
|
---|
851 | }
|
---|
852 | if(tcsetattr(fd, TCSANOW, &termios) < 0)
|
---|
853 | {
|
---|
854 | perror("ERROR: setting serial attributes");
|
---|
855 | return (-1);
|
---|
856 | }
|
---|
857 | if(fcntl(fd, F_SETFL, 0) == -1)
|
---|
858 | {
|
---|
859 | perror("WARNING: setting blocking mode failed");
|
---|
860 | }
|
---|
861 | return (fd);
|
---|
862 | }
|
---|
863 |
|
---|
864 | /*
|
---|
865 | * usage
|
---|
866 | *
|
---|
867 | * Send a usage message to standard error and quit the program.
|
---|
868 | *
|
---|
869 | * Parameters:
|
---|
870 | * None.
|
---|
871 | *
|
---|
872 | * Return Value:
|
---|
873 | * The function does not return a value.
|
---|
874 | *
|
---|
875 | * Remarks:
|
---|
876 | *
|
---|
877 | */
|
---|
878 |
|
---|
879 | static
|
---|
880 | #ifdef __GNUC__
|
---|
881 | __attribute__ ((noreturn))
|
---|
882 | #endif /* __GNUC__ */
|
---|
883 | void usage(int rc)
|
---|
884 | {
|
---|
885 | fprintf(stderr, "Usage: %s [OPTIONS]\n", VERSION);
|
---|
886 | fprintf(stderr, " Options are: [-] \n");
|
---|
887 | fprintf(stderr, " -a DestinationCaster name or address (default: %s)\n",
|
---|
888 | NTRIP_CASTER);
|
---|
889 | fprintf(stderr, " -p DestinationCaster port (default: %d)\n", NTRIP_PORT);
|
---|
890 | fprintf(stderr, " -m DestinationCaster mountpoint\n");
|
---|
891 | fprintf(stderr, " -c DestinationCaster password\n");
|
---|
892 | fprintf(stderr, " -h|? print this help screen\n");
|
---|
893 | fprintf(stderr, " -M <mode> sets the input mode\n");
|
---|
894 | fprintf(stderr, " (1=serial, 2=tcpsocket, 3=file, 4=sisnet"
|
---|
895 | ", 5=udpsocket, 6=caster)\n");
|
---|
896 | fprintf(stderr, " Mode = file:\n");
|
---|
897 | fprintf(stderr, " -s file, simulate data stream by reading log file\n");
|
---|
898 | fprintf(stderr, " default/current setting is %s\n", filepath);
|
---|
899 | fprintf(stderr, " Mode = serial:\n");
|
---|
900 | fprintf(stderr, " -b baud_rate, sets serial input baud rate\n");
|
---|
901 | fprintf(stderr, " default/current value is %d\n", ttybaud);
|
---|
902 | fprintf(stderr, " -i input_device, sets name of serial input device\n");
|
---|
903 | fprintf(stderr, " default/current value is %s\n", ttyport);
|
---|
904 | fprintf(stderr, " (normally a symbolic link to /dev/tty\?\?)\n");
|
---|
905 | fprintf(stderr, " Mode = tcpsocket or udpsocket:\n");
|
---|
906 | fprintf(stderr, " -P receiver port (default: %d)\n", SERV_TCP_PORT);
|
---|
907 | fprintf(stderr, " -H hostname of TCP server (default: %s)\n",
|
---|
908 | SERV_HOST_ADDR);
|
---|
909 | fprintf(stderr, " -f initfile send to server\n");
|
---|
910 | fprintf(stderr, " -B bindmode: bind to incoming UDP stream\n");
|
---|
911 | fprintf(stderr, " Mode = sisnet:\n");
|
---|
912 | fprintf(stderr, " -P receiver port (default: %d)\n", SISNET_PORT);
|
---|
913 | fprintf(stderr, " -H hostname of TCP server (default: %s)\n",
|
---|
914 | SISNET_SERVER);
|
---|
915 | fprintf(stderr, " -u username\n");
|
---|
916 | fprintf(stderr, " -l password\n");
|
---|
917 | fprintf(stderr, " -V version [2.1, 3.0 or 3.1] (default: 3.1)\n");
|
---|
918 | fprintf(stderr, " Mode = caster:\n");
|
---|
919 | fprintf(stderr, " -P SourceCaster port (default: %d)\n", NTRIP_PORT);
|
---|
920 | fprintf(stderr, " -H SourceCaster hostname (default: %s)\n",
|
---|
921 | NTRIP_CASTER);
|
---|
922 | fprintf(stderr, " -D SourceCaster mountpoint\n");
|
---|
923 | fprintf(stderr, " -U SourceCaster mountpoint username\n");
|
---|
924 | fprintf(stderr, " -W SourceCaster mountpoint password\n");
|
---|
925 | fprintf(stderr, "\n");
|
---|
926 | exit(rc);
|
---|
927 | }
|
---|
928 |
|
---|
929 | static const char encodingTable [64] = {
|
---|
930 | 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
|
---|
931 | 'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
|
---|
932 | 'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
|
---|
933 | 'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'
|
---|
934 | };
|
---|
935 |
|
---|
936 | /* does not buffer overrun, but breaks directly after an error */
|
---|
937 | /* returns the number of required bytes */
|
---|
938 | static int encode(char *buf, int size, const char *user, const char *pwd)
|
---|
939 | {
|
---|
940 | unsigned char inbuf[3];
|
---|
941 | char *out = buf;
|
---|
942 | int i, sep = 0, fill = 0, bytes = 0;
|
---|
943 |
|
---|
944 | while(*user || *pwd)
|
---|
945 | {
|
---|
946 | i = 0;
|
---|
947 | while(i < 3 && *user) inbuf[i++] = *(user++);
|
---|
948 | if(i < 3 && !sep) {inbuf[i++] = ':'; ++sep; }
|
---|
949 | while(i < 3 && *pwd) inbuf[i++] = *(pwd++);
|
---|
950 | while(i < 3) {inbuf[i++] = 0; ++fill; }
|
---|
951 | if(out-buf < size-1)
|
---|
952 | *(out++) = encodingTable[(inbuf [0] & 0xFC) >> 2];
|
---|
953 | if(out-buf < size-1)
|
---|
954 | *(out++) = encodingTable[((inbuf [0] & 0x03) << 4)
|
---|
955 | | ((inbuf [1] & 0xF0) >> 4)];
|
---|
956 | if(out-buf < size-1)
|
---|
957 | {
|
---|
958 | if(fill == 2)
|
---|
959 | *(out++) = '=';
|
---|
960 | else
|
---|
961 | *(out++) = encodingTable[((inbuf [1] & 0x0F) << 2)
|
---|
962 | | ((inbuf [2] & 0xC0) >> 6)];
|
---|
963 | }
|
---|
964 | if(out-buf < size-1)
|
---|
965 | {
|
---|
966 | if(fill >= 1)
|
---|
967 | *(out++) = '=';
|
---|
968 | else
|
---|
969 | *(out++) = encodingTable[inbuf [2] & 0x3F];
|
---|
970 | }
|
---|
971 | bytes += 4;
|
---|
972 | }
|
---|
973 | if(out-buf < size)
|
---|
974 | *out = 0;
|
---|
975 | return bytes;
|
---|
976 | }
|
---|