1 | /*
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2 | * main.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 1.7 2005/02/17 09:22:23 stoecker Exp $
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44 | * Changes - Version 0.7
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45 | * Thu Sep 22 08:10:45 2003 actina AG <http://www.actina.de>
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46 | *
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47 | * Steffen Tschirpke <St.Tschirpke@actina.de>
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48 | * * main.c
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49 | * - socket support
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50 | * - command line option handling
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51 | * - error handling
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52 | * - help screen
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53 | */
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54 |
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55 | /* Changes - Version 0.9
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56 | * Feb 15 2005 Dirk Stoecker <soft@dstoecker.de>
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57 | */
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58 |
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59 | #include <stdio.h>
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60 | #include <string.h>
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61 | #include <unistd.h>
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62 | #include <stdlib.h>
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63 | #include <sys/types.h>
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64 | #include <sys/socket.h>
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65 | #include <netinet/in.h>
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66 | #include <arpa/inet.h>
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67 | #include <netdb.h>
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68 | #include <getopt.h>
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69 | #include <sys/termios.h>
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70 | #include <fcntl.h>
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71 | #include "NtripServerLinux.h"
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72 |
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73 | #define VERSION "NTRIP NtripServerLinux/0.9"
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74 |
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75 | #define SIMULATE 0
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76 | #define SERIAL 1
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77 | #define TCPSOCKET 2
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78 |
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79 | /* default socket source */
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80 | #define SERV_HOST_ADDR "127.0.0.1"
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81 | #define SERV_TCP_PORT 1025
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82 |
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83 | /* default destination */
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84 | #define NTRIP_CASTER "www.euref-ip.net"
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85 | #define NTRIP_PORT 80
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86 |
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87 | int verbose = 0;
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88 | int simulate = 0;
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89 | int tickinterval = 1;
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90 | int ttybaud = 19200;
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91 | char * ttyport = "/dev/gps";
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92 | int mode = 0;
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93 |
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94 | /* Forward references */
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95 | int openserial (u_char * tty, int blocksz, int ttybaud);
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96 | int send_receive_loop(int socket, int fd);
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97 | void usage (int);
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98 |
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99 | /*
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100 | * main
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101 | *
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102 | * Main entry point for the program. Processes command-line arguments and
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103 | * prepares for action.
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104 | *
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105 | * Parameters:
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106 | * argc : integer : Number of command-line arguments.
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107 | * argv : array of char : Command-line arguments as an array of zero-terminated
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108 | * pointers to strings.
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109 | *
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110 | * Return Value:
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111 | * The function does not return a value (although its return type is int).
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112 | *
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113 | * Remarks:
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114 | *
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115 | */
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116 |
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117 | int main (int argc, char ** argv)
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118 | {
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119 | u_char * ttyin = ttyport;
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120 | char * logfilepath = NULL;
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121 | FILE * fp = NULL;
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122 | int c, gpsfd = -1;
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123 | int size = 2048; //for setting send buffer size
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124 |
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125 | unsigned int out_port = 0;
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126 | unsigned int in_port = 0;
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127 | char *mountpoint = NULL;
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128 | char *password = NULL;
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129 | int sock_id;
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130 | char szSendBuffer[BUFSZ];
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131 | int nBufferBytes;
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132 | int sockfd;
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133 |
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134 | struct hostent *inhost;
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135 | struct hostent *outhost;
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136 |
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137 | struct sockaddr_in in_addr;
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138 | struct sockaddr_in out_addr;
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139 |
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140 | if(!(outhost = gethostbyname(NTRIP_CASTER)))
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141 | {
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142 | fprintf(stderr, "host %s unknown\n\n", NTRIP_CASTER);
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143 | }
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144 | else
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145 | {
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146 | memset((char *) &out_addr, 0x00, sizeof(out_addr));
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147 | memcpy(&out_addr.sin_addr, outhost->h_addr, outhost->h_length);
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148 | }
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149 |
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150 | //get and check program arguments
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151 | if (argc <=1)
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152 | {
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153 | usage(2);
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154 | exit(1);
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155 | }
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156 | while ((c = getopt (argc, argv, "M:i:h:b:p:s:a:m:c:H:P:")) != EOF)
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157 | {
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158 | switch (c)
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159 | {
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160 | case 'M':
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161 | mode = atoi(optarg);
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162 | if ((mode == 0) || (mode > 3))
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163 | {
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164 | fprintf (stderr, "can't convert %s to a valid mode\n\n", optarg);
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165 | usage(-1);
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166 | }
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167 | break;
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168 | case 'i': /* gps serial ttyin */
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169 | ttyin = optarg;
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170 | break;
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171 | case 'b': /* serial ttyin speed */
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172 | ttybaud = atoi (optarg);
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173 | if (ttybaud <= 1)
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174 | {
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175 | fprintf (stderr, "can't convert %s to valid ttyin speed\n\n", optarg);
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176 | usage(1);
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177 | }
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178 | break;
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179 | case 'a': /* http server IP address A.B.C.D*/
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180 | outhost = gethostbyname(optarg);
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181 | if (outhost == NULL)
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182 | {
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183 | fprintf (stderr, "host %s unknown\n\n", optarg);
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184 | usage(-2);
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185 | }
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186 | memset((char *) &out_addr, 0x00, sizeof(out_addr));
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187 | memcpy(&out_addr.sin_addr, outhost->h_addr, outhost->h_length);
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188 | break;
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189 | case 'p': /* http server port*/
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190 | out_port = atoi(optarg);
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191 | if (out_port <= 1)
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192 | {
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193 | fprintf (stderr, "can't convert %s to a valid http server port\n\n", optarg);
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194 | usage(1);
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195 | }
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196 | break;
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197 | case 'm': /* http server mountpoint*/
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198 | mountpoint = optarg;
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199 | break;
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200 | case 's': /* simulate datastream from file */
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201 | logfilepath = optarg;
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202 | break;
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203 | case 'c': /* password */
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204 | password=optarg;
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205 | break;
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206 | case 'H': /* host */
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207 | inhost = gethostbyname(optarg);
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208 | if (inhost == NULL)
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209 | {
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210 | /* TODO Errorhandling/Debugging - Output */
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211 | fprintf (stderr, "host %s unknown\n\n", optarg);
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212 | usage(-2);
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213 | }
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214 | memset((char *) &in_addr, 0x00, sizeof(in_addr));
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215 | memcpy(&in_addr.sin_addr, inhost->h_addr, inhost->h_length);
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216 | break;
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217 | case 'P': /* port */
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218 | in_port = atoi(optarg);
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219 | if (in_port <= 1)
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220 | {
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221 | /* TODO Errorhandling/Debugging - Output */
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222 | fprintf (stderr, "can't convert %s to a valid receiver port\n\n", optarg);
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223 | usage(1);
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224 | }
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225 | break;
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226 | case 'h': /* help */
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227 | case '?':
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228 | usage(0);
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229 | break;
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230 | default:
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231 | usage(2);
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232 | break;
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233 | }
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234 |
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235 | if (in_port <= 0 )
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236 | {
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237 | in_port = SERV_TCP_PORT;
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238 | }
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239 | if (out_port <= 0 )
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240 | {
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241 | out_port = NTRIP_PORT;
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242 | }
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243 | }
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244 |
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245 | argc -= optind;
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246 | argv += optind;
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247 |
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248 | if (argc > 0)
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249 | {
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250 | /* TODO Errorhandling/Debugging - Output */
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251 | fprintf (stderr, "Extra args on command line.\n");
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252 | for (; argc > 0; argc--)
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253 | {
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254 | fprintf (stderr, " %s", *argv++);
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255 | }
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256 | fprintf (stderr, "\n");
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257 | usage (1); /* never returns */
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258 | }
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259 |
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260 | if ((mode ==SIMULATE) && (tickinterval <= 0))
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261 | {
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262 | /* TODO Errorhandling/Debugging - Output */
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263 | fprintf (stderr, "-t parameter must be positive in simulator mode\n");
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264 | exit (1);
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265 | }
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266 |
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267 | if (verbose >= 1)
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268 | fprintf (stderr, "%s\n", VERSION);
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269 | if (mountpoint == NULL)
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270 | {
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271 | /* TODO Errorhandling/Debugging - Output */
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272 | fprintf(stderr,"missing mountpoint arguement\n");
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273 | exit(1);
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274 | }
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275 | //print program arguments on screen
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276 | /* TODO Errorhandling/Debugging - Output */
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277 | // printf("\ncaster IP :\t%s\nport :\t%d\nmountpoint :\t%s\npassword :\t%s\n\n",address,port,mountpoint,(password==NULL)?"none":"yes");
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278 | if (password == NULL)
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279 | {
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280 | password="\0";
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281 | }
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282 |
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283 | switch (mode)
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284 | {
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285 | case SIMULATE:
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286 | {
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287 | fp = fopen (logfilepath, "r");
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288 | if (!fp)
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289 | {
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290 | /* TODO Errorhandling/Debugging - Output */
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291 | perror ("fopen logfile");
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292 | exit (1);
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293 | }
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294 | }
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295 | break;
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296 | case SERIAL: //open serial port
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297 | {
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298 | gpsfd = openserial (ttyin, 1, ttybaud);
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299 | fp = fdopen (gpsfd, "r");
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300 | if (!fp)
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301 | {
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302 | /* TODO Errorhandling/Debugging - Output */
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303 | perror ("fdopen gps");
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304 | exit (1);
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305 | }
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306 | }
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307 | break;
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308 | case TCPSOCKET:
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309 | {
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310 | in_addr.sin_family = AF_INET;
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311 | in_addr.sin_port = htons(in_port);
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312 |
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313 | if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
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314 | {
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315 | /* TODO Errorhandling/Debugging - Output */
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316 | fprintf (stderr, "can't create socket\n");
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317 | exit(1);
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318 | }
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319 |
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320 | /* TODO Errorhandling/Debugging - Output */
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321 | printf("connecting input ...\n");
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322 | fprintf (stderr, "socket input:\n");
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323 | fprintf (stderr, "\tHost: %s\n", inet_ntoa(in_addr.sin_addr));
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324 | fprintf (stderr, "\tPort: %d\n", in_port);
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325 |
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326 | if (connect(sockfd, (struct sockaddr *) &in_addr, sizeof(in_addr)) < 0)
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327 | {
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328 | /* TODO Errorhandling/Debugging - Output */
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329 | fprintf (stderr, "can't connect input to %s at port %d\n", inet_ntoa(in_addr.sin_addr), in_port);
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330 | // exit(1);
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331 | }
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332 | gpsfd = sockfd;
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333 | }
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334 | break;
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335 | default:
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336 | usage(-1);
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337 | break;
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338 | }
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339 |
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340 | out_addr.sin_family = AF_INET;
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341 | out_addr.sin_port = htons((u_short)(out_port));
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342 |
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343 | // ----- main part -----
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344 | while(1)
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345 | {
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346 | //create socket
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347 | if ((sock_id = socket(AF_INET, SOCK_STREAM, 0)) < 0)
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348 | {
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349 | /* TODO Errorhandling/Debugging - Output */
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350 | printf("ERROR : could not create socket\n");
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351 | // sleep(5);
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352 | exit(2);
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353 | }
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354 | //connect to caster
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355 | printf("connecting output ...\n");
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356 | fprintf (stderr, "caster output:\n");
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357 | fprintf (stderr, "\tHost: %s\n", inet_ntoa(out_addr.sin_addr));
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358 | fprintf (stderr, "\tPort: %d\n", out_port);
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359 | if (connect(sock_id, (struct sockaddr *) &out_addr, sizeof(out_addr)) < 0)
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360 | {
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361 | /* TODO Errorhandling/Debugging - Output */
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362 | fprintf (stderr, "can't connect output to %s at port %d\n", inet_ntoa(out_addr.sin_addr), out_port);
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363 | close(sock_id);
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364 | // sleep(5);
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365 | exit(3);
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366 | }
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367 |
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368 | /* TODO Errorhandling/Debugging - Output */
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369 | printf("connection succesfull\n");
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370 | //set socket buffer size
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371 | setsockopt(sock_id,SOL_SOCKET,SO_SNDBUF,(const char *) &size,sizeof(const char *));
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372 | //send message to caster
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373 | szSendBuffer[0] = '\0';
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374 | sprintf(szSendBuffer,"SOURCE %s /%s\r\n",password,mountpoint);
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375 | strcat(szSendBuffer,"Source-Agent: ");
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376 | strcat(szSendBuffer,VERSION);
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377 | strcat(szSendBuffer, "\r\n");
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378 | strcat(szSendBuffer, "\r\n");
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379 | strcat(szSendBuffer, "\0");
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380 | nBufferBytes=strlen(szSendBuffer);
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381 | if ((send(sock_id, szSendBuffer, nBufferBytes, 0)) != nBufferBytes)
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382 | {
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383 | /* TODO Errorhandling/Debugging - Output */
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384 | fprintf(stderr, "ERROR : could not send to caster\n");
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385 | close(sock_id);
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386 | sleep(5);
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387 | exit(0);
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388 | }
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389 | //check caster's response
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390 | nBufferBytes=recv(sock_id,szSendBuffer,sizeof(szSendBuffer),0);
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391 | szSendBuffer[nBufferBytes]='\0';
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392 | if(strcmp(szSendBuffer,"OK\r\n"))
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393 | {
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394 | /* TODO Errorhandling/Debugging - Output */
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395 | fprintf(stderr,"caster's reply is not OK\n");
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396 | close(sock_id);
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397 | sleep(5);
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398 | exit(0);
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399 | }
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400 | send_receive_loop(sock_id, gpsfd);
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401 | }
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402 | exit(0);
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403 | }
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404 |
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405 | int send_receive_loop(int socket, int fd)
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406 | {
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407 | char buffer[BUFSZ]={0};
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408 | int nBufferBytes=0;
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409 | //data transmission
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410 | printf("transfering data ...\n");
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411 | while(1)
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412 | {
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413 | // recieving data
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414 | nBufferBytes = read(fd, buffer, BUFSZ);
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415 | if (nBufferBytes<=0)
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416 | {
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417 | /* TODO Errorhandling/Debugging - Output */
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418 | printf("ERROR : no data recieved from serial port or socket\n");
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419 | }
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420 | // send data
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421 | if((send(socket, buffer, nBufferBytes, MSG_DONTWAIT)) != nBufferBytes)
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422 | { //MSG_DONTWAIT : send works in non-blocking mode
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423 | /* TODO Errorhandling/Debugging - Output */
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424 | fprintf(stderr,"ERROR : could not send data\n");
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425 | close(socket);
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426 | sleep(5);
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427 | exit(4);
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428 | }
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429 | }
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430 | }
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431 |
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432 | /*
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433 | * openserial
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434 | *
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435 | * Open the serial port with the given device name and configure it for
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436 | * reading NMEA data from a GPS receiver.
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437 | *
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438 | * Parameters:
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439 | * tty : pointer to : A zero-terminated string containing the device
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440 | * unsigned char name of the appropriate serial port.
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441 | * blocksz : integer : Block size for port I/O
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442 | * ttybaud : integer : Baud rate for port I/O
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443 | *
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444 | * Return Value:
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445 | * The function returns a file descriptor for the opened port if successful.
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446 | * The function returns -1 in the event of an error.
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447 | *
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448 | * Remarks:
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449 | *
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450 | */
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451 |
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452 | int openserial (u_char * tty, int blocksz, int ttybaud)
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453 | {
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454 | int fd;
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455 | struct termios termios;
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456 |
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457 | fd = open(tty, O_RDWR | O_NONBLOCK
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458 | #ifdef O_EXLOCK /* for Linux */
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459 | | O_EXLOCK
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460 | #endif
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461 | );
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462 | if (fd < 0) {
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463 | perror("open");
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464 | return (-1);
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465 | }
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466 | if (tcgetattr(fd, &termios) < 0) {
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467 |
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468 | perror("tcgetattr");
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469 | return (-1);
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470 | }
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471 | termios.c_iflag = 0;
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472 | termios.c_oflag = 0; /* (ONLRET) */
|
---|
473 | termios.c_cflag = CS8 | CLOCAL | CREAD;
|
---|
474 | termios.c_lflag = 0;
|
---|
475 | {
|
---|
476 | int cnt;
|
---|
477 | for (cnt = 0; cnt < NCCS; cnt++)
|
---|
478 | termios.c_cc[cnt] = -1;
|
---|
479 | }
|
---|
480 | termios.c_cc[VMIN] = blocksz;
|
---|
481 | termios.c_cc[VTIME] = 2;
|
---|
482 |
|
---|
483 | #if (B4800 != 4800)
|
---|
484 | /*
|
---|
485 | * Not every system has speed settings equal to absolute speed value.
|
---|
486 | */
|
---|
487 |
|
---|
488 | switch (ttybaud)
|
---|
489 | {
|
---|
490 | case 300:
|
---|
491 | ttybaud = B300;
|
---|
492 | break;
|
---|
493 | case 1200:
|
---|
494 | ttybaud = B1200;
|
---|
495 | break;
|
---|
496 | case 2400:
|
---|
497 | ttybaud = B2400;
|
---|
498 | break;
|
---|
499 | case 4800:
|
---|
500 | ttybaud = B4800;
|
---|
501 | break;
|
---|
502 | case 9600:
|
---|
503 | ttybaud = B9600;
|
---|
504 | break;
|
---|
505 | case 19200:
|
---|
506 | ttybaud = B19200;
|
---|
507 | break;
|
---|
508 | case 38400:
|
---|
509 | ttybaud = B38400;
|
---|
510 | break;
|
---|
511 | #ifdef B57600
|
---|
512 | case 57600:
|
---|
513 | ttybaud = B57600;
|
---|
514 | break;
|
---|
515 | #endif
|
---|
516 | #ifdef B115200
|
---|
517 | case 115200:
|
---|
518 | ttybaud = B115200;
|
---|
519 | break;
|
---|
520 | #endif
|
---|
521 | #ifdef B230400
|
---|
522 | case 230400:
|
---|
523 | ttybaud = B230400;
|
---|
524 | break;
|
---|
525 | #endif
|
---|
526 | default:
|
---|
527 | fprintf(stderr, "Baud settings not useful, using 19200\n");
|
---|
528 | ttybaud = B19200;
|
---|
529 | break;
|
---|
530 | }
|
---|
531 | #endif
|
---|
532 |
|
---|
533 | if (cfsetispeed(&termios, ttybaud) != 0)
|
---|
534 | {
|
---|
535 | perror("cfsetispeed");
|
---|
536 | return (-1);
|
---|
537 | }
|
---|
538 | if (cfsetospeed(&termios, ttybaud) != 0)
|
---|
539 | {
|
---|
540 | perror("cfsetospeed");
|
---|
541 | return (-1);
|
---|
542 | }
|
---|
543 | if (tcsetattr(fd, TCSANOW, &termios) < 0)
|
---|
544 | {
|
---|
545 | perror("tcsetattr");
|
---|
546 | return (-1);
|
---|
547 | }
|
---|
548 | #if 1 /* WANT_BLOCKING_READ */
|
---|
549 | if (fcntl(fd, F_SETFL, 0) == -1)
|
---|
550 | {
|
---|
551 | perror("fcntl: set nonblock");
|
---|
552 | }
|
---|
553 | #endif
|
---|
554 | return (fd);
|
---|
555 | }
|
---|
556 |
|
---|
557 | /*
|
---|
558 | * usage
|
---|
559 | *
|
---|
560 | * Send a usage message to standard error and quit the program.
|
---|
561 | *
|
---|
562 | * Parameters:
|
---|
563 | * None.
|
---|
564 | *
|
---|
565 | * Return Value:
|
---|
566 | * The function does not return a value.
|
---|
567 | *
|
---|
568 | * Remarks:
|
---|
569 | *
|
---|
570 | */
|
---|
571 |
|
---|
572 | void usage (int rc)
|
---|
573 | {
|
---|
574 | fprintf (stderr, "%s: application\n",VERSION);
|
---|
575 | fprintf (stderr, "Usage: %s [OPTIONS]\n",VERSION);
|
---|
576 | fprintf (stderr, " Options are:\n");
|
---|
577 | fprintf (stderr, " -a caster name or address (default: %s)\n", NTRIP_CASTER);
|
---|
578 | fprintf (stderr, " -p caster port (default: %d)\n", NTRIP_PORT);
|
---|
579 | fprintf (stderr, " -m caster mountpoint\n");
|
---|
580 | fprintf (stderr, " -c password for caster login\n");
|
---|
581 | fprintf (stderr, " -h|? print this help screen\n");
|
---|
582 | fprintf (stderr, " -M <mode> sets the mode\n");
|
---|
583 | fprintf (stderr, " (1=serial, 2=tcpsocket, 3=simulate)\n");
|
---|
584 | fprintf (stderr, " Mode = simulate:\n");
|
---|
585 | fprintf (stderr, " -s file, simulate data stream by reading log file\n");
|
---|
586 | fprintf (stderr, " default/current setting is %s\n", (simulate ? "enabled" : "disabled"));
|
---|
587 | fprintf (stderr, " Mode = serial:\n");
|
---|
588 | fprintf (stderr, " -b baud_rate, sets serial input baud rate\n");
|
---|
589 | fprintf (stderr, " default/current value is %d\n", ttybaud);
|
---|
590 | fprintf (stderr, " -i input_device, sets name of serial input device\n");
|
---|
591 | fprintf (stderr, " default/current value is %s\n", ttyport);
|
---|
592 | fprintf (stderr, " (normally a symbolic link to /dev/tty\?\?)\n");
|
---|
593 | fprintf (stderr, " Mode = tcpsocket:\n");
|
---|
594 | fprintf (stderr, " -P receiver port (default: 1025)\n");
|
---|
595 | fprintf (stderr, " -H hostname of TCP server (default: 127.0.0.1)\n");
|
---|
596 | fprintf (stderr, " \n");
|
---|
597 | exit (rc);
|
---|
598 | }
|
---|