[483] | 1 | /*
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[484] | 2 | Easy example NTRIP client for POSIX.
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[496] | 3 | $Id: ntripclient.c,v 1.31 2007/09/18 07:09:07 stoecker Exp $
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[483] | 4 | Copyright (C) 2003-2005 by Dirk Stoecker <soft@dstoecker.de>
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| 5 |
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| 6 | This program is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2 of the License, or
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| 9 | (at your option) any later version.
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| 10 |
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| 11 | This program is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | GNU General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with this program; if not, write to the Free Software
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| 18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 19 | or read http://www.gnu.org/licenses/gpl.txt
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| 20 | */
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| 21 |
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| 22 | #include <ctype.h>
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| 23 | #include <getopt.h>
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| 24 | #include <signal.h>
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| 25 | #include <stdio.h>
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| 26 | #include <stdlib.h>
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| 27 | #include <unistd.h>
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| 28 | #include <errno.h>
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| 29 | #include <string.h>
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| 30 | #include <netdb.h>
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| 31 | #include <sys/types.h>
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| 32 | #include <netinet/in.h>
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| 33 | #include <sys/socket.h>
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| 34 | #include <time.h>
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| 35 |
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| 36 | #ifndef COMPILEDATE
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| 37 | #define COMPILEDATE " built " __DATE__
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| 38 | #endif
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| 39 |
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| 40 | /* The string, which is send as agent in HTTP request */
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[484] | 41 | #define AGENTSTRING "NTRIP NtripClientPOSIX"
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[483] | 42 |
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| 43 | #define MAXDATASIZE 1000 /* max number of bytes we can get at once */
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| 44 | #define ALARMTIME (2*60)
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| 45 |
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| 46 | /* CVS revision and version */
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[496] | 47 | static char revisionstr[] = "$Revision: 1.31 $";
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| 48 | static char datestr[] = "$Date: 2007/09/18 07:09:07 $";
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[483] | 49 |
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[494] | 50 | enum MODE { HTTP = 1, RTSP = 2, NTRIP1 = 3, AUTO = 4, END };
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| 51 |
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[483] | 52 | struct Args
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| 53 | {
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| 54 | const char *server;
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[494] | 55 | const char *port;
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[483] | 56 | const char *user;
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[494] | 57 | const char *proxyhost;
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| 58 | const char *proxyport;
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[483] | 59 | const char *password;
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| 60 | const char *nmea;
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| 61 | const char *data;
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| 62 | int bitrate;
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[494] | 63 | int mode;
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[483] | 64 | };
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| 65 |
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[494] | 66 |
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| 67 |
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[483] | 68 | /* option parsing */
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| 69 | #ifdef NO_LONG_OPTS
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| 70 | #define LONG_OPT(a)
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| 71 | #else
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| 72 | #define LONG_OPT(a) a
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| 73 | static struct option opts[] = {
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| 74 | { "bitrate", no_argument, 0, 'b'},
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| 75 | { "data", required_argument, 0, 'd'},
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| 76 | { "server", required_argument, 0, 's'},
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| 77 | { "password", required_argument, 0, 'p'},
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| 78 | { "port", required_argument, 0, 'r'},
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[494] | 79 | { "proxyport", required_argument, 0, 'R'},
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| 80 | { "proxyhost", required_argument, 0, 'S'},
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[483] | 81 | { "user", required_argument, 0, 'u'},
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| 82 | { "nmea", required_argument, 0, 'n'},
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| 83 | { "help", no_argument, 0, 'h'},
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| 84 | {0,0,0,0}};
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| 85 | #endif
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[494] | 86 | #define ARGOPT "-d:bhp:r:s:u:n:S:R:M:"
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[483] | 87 |
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| 88 | #ifdef __GNUC__
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| 89 | static __attribute__ ((noreturn)) void sighandler_alarm(
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| 90 | int sig __attribute__((__unused__)))
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| 91 | #else /* __GNUC__ */
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| 92 | static void sighandler_alarm(int sig)
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| 93 | #endif /* __GNUC__ */
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| 94 | {
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| 95 | fprintf(stderr, "ERROR: more than %d seconds no activity\n", ALARMTIME);
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| 96 | exit(1);
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| 97 | }
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| 98 |
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[494] | 99 | int stop = 0;
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| 100 | #ifdef __GNUC__
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| 101 | static void sighandler_int(int sig __attribute__((__unused__)))
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| 102 | #else /* __GNUC__ */
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| 103 | static void sighandler_alarm(int sig)
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| 104 | #endif /* __GNUC__ */
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| 105 | {
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| 106 | alarm(2);
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| 107 | stop = 1;
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| 108 | }
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| 109 |
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[483] | 110 | static const char *geturl(const char *url, struct Args *args)
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| 111 | {
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| 112 | static char buf[1000];
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| 113 | static char *Buffer = buf;
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| 114 | static char *Bufend = buf+sizeof(buf);
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| 115 |
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| 116 | if(strncmp("ntrip:", url, 6))
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| 117 | return "URL must start with 'ntrip:'.";
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| 118 | url += 6; /* skip ntrip: */
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| 119 |
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| 120 | if(*url != '@' && *url != '/')
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| 121 | {
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| 122 | /* scan for mountpoint */
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| 123 | args->data = Buffer;
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| 124 | while(*url && *url != '@' && *url != ';' &&*url != '/' && Buffer != Bufend)
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| 125 | *(Buffer++) = *(url++);
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| 126 | if(Buffer == args->data)
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| 127 | return "Mountpoint required.";
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| 128 | else if(Buffer >= Bufend-1)
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| 129 | return "Parsing buffer too short.";
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| 130 | *(Buffer++) = 0;
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| 131 | }
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| 132 |
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| 133 | if(*url == '/') /* username and password */
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| 134 | {
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| 135 | ++url;
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| 136 | args->user = Buffer;
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| 137 | while(*url && *url != '@' && *url != ';' && *url != ':' && Buffer != Bufend)
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| 138 | *(Buffer++) = *(url++);
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| 139 | if(Buffer == args->user)
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| 140 | return "Username cannot be empty.";
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| 141 | else if(Buffer >= Bufend-1)
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| 142 | return "Parsing buffer too short.";
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| 143 | *(Buffer++) = 0;
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| 144 |
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| 145 | if(*url == ':') ++url;
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| 146 |
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| 147 | args->password = Buffer;
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| 148 | while(*url && *url != '@' && *url != ';' && Buffer != Bufend)
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| 149 | *(Buffer++) = *(url++);
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| 150 | if(Buffer == args->password)
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| 151 | return "Password cannot be empty.";
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| 152 | else if(Buffer >= Bufend-1)
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| 153 | return "Parsing buffer too short.";
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| 154 | *(Buffer++) = 0;
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| 155 | }
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| 156 |
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| 157 | if(*url == '@') /* server */
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| 158 | {
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| 159 | ++url;
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[494] | 160 | if(*url != '@' && *url != ':')
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| 161 | {
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| 162 | args->server = Buffer;
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| 163 | while(*url && *url != '@' && *url != ':' && *url != ';' && Buffer != Bufend)
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| 164 | *(Buffer++) = *(url++);
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| 165 | if(Buffer == args->server)
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| 166 | return "Servername cannot be empty.";
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| 167 | else if(Buffer >= Bufend-1)
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| 168 | return "Parsing buffer too short.";
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| 169 | *(Buffer++) = 0;
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| 170 | }
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[483] | 171 |
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| 172 | if(*url == ':')
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| 173 | {
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[494] | 174 | ++url;
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| 175 | args->port = Buffer;
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| 176 | while(*url && *url != '@' && *url != ';' && Buffer != Bufend)
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| 177 | *(Buffer++) = *(url++);
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| 178 | if(Buffer == args->port)
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| 179 | return "Port cannot be empty.";
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| 180 | else if(Buffer >= Bufend-1)
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| 181 | return "Parsing buffer too short.";
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| 182 | *(Buffer++) = 0;
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[483] | 183 | }
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[494] | 184 |
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| 185 | if(*url == '@') /* proxy */
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| 186 | {
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| 187 | ++url;
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| 188 | args->proxyhost = Buffer;
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| 189 | while(*url && *url != ':' && *url != ';' && Buffer != Bufend)
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| 190 | *(Buffer++) = *(url++);
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| 191 | if(Buffer == args->proxyhost)
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| 192 | return "Proxy servername cannot be empty.";
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| 193 | else if(Buffer >= Bufend-1)
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| 194 | return "Parsing buffer too short.";
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| 195 | *(Buffer++) = 0;
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| 196 |
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| 197 | if(*url == ':')
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| 198 | {
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| 199 | ++url;
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| 200 | args->proxyport = Buffer;
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| 201 | while(*url && *url != ';' && Buffer != Bufend)
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| 202 | *(Buffer++) = *(url++);
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| 203 | if(Buffer == args->proxyport)
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| 204 | return "Proxy port cannot be empty.";
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| 205 | else if(Buffer >= Bufend-1)
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| 206 | return "Parsing buffer too short.";
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| 207 | *(Buffer++) = 0;
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| 208 | }
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| 209 | }
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[483] | 210 | }
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| 211 | if(*url == ';') /* NMEA */
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| 212 | {
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| 213 | args->nmea = ++url;
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| 214 | while(*url)
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| 215 | ++url;
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| 216 | }
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| 217 |
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| 218 | return *url ? "Garbage at end of server string." : 0;
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| 219 | }
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| 220 |
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| 221 | static int getargs(int argc, char **argv, struct Args *args)
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| 222 | {
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| 223 | int res = 1;
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| 224 | int getoptr;
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| 225 | char *a;
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| 226 | int i = 0, help = 0;
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| 227 |
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| 228 | args->server = "www.euref-ip.net";
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[494] | 229 | args->port = "2101";
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[483] | 230 | args->user = "";
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| 231 | args->password = "";
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| 232 | args->nmea = 0;
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| 233 | args->data = 0;
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| 234 | args->bitrate = 0;
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[494] | 235 | args->proxyhost = 0;
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| 236 | args->proxyport = "2101";
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| 237 | args->mode = AUTO;
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[483] | 238 | help = 0;
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| 239 |
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| 240 | do
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| 241 | {
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| 242 | #ifdef NO_LONG_OPTS
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| 243 | switch((getoptr = getopt(argc, argv, ARGOPT)))
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| 244 | #else
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| 245 | switch((getoptr = getopt_long(argc, argv, ARGOPT, opts, 0)))
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| 246 | #endif
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| 247 | {
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| 248 | case 's': args->server = optarg; break;
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| 249 | case 'u': args->user = optarg; break;
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| 250 | case 'p': args->password = optarg; break;
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| 251 | case 'd': args->data = optarg; break;
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| 252 | case 'n': args->nmea = optarg; break;
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| 253 | case 'b': args->bitrate = 1; break;
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| 254 | case 'h': help=1; break;
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[494] | 255 | case 'r': args->port = optarg; break;
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| 256 | case 'S': args->proxyhost = optarg; break;
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| 257 | case 'R': args->proxyport = optarg; break;
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| 258 | case 'M':
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| 259 | args->mode = 0;
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| 260 | if (!strcmp(optarg,"n") || !strcmp(optarg,"ntrip1"))
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| 261 | args->mode = NTRIP1;
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| 262 | else if(!strcmp(optarg,"h") || !strcmp(optarg,"http"))
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| 263 | args->mode = HTTP;
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| 264 | else if(!strcmp(optarg,"r") || !strcmp(optarg,"rtsp"))
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| 265 | args->mode = RTSP;
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| 266 | else if(!strcmp(optarg,"a") || !strcmp(optarg,"auto"))
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| 267 | args->mode = AUTO;
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| 268 | else args->mode = atoi(optarg);
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| 269 | if((args->mode == 0) || (args->mode >= END))
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| 270 | {
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| 271 | fprintf(stderr, "Mode %s unknown\n", optarg);
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| 272 | res = 0;
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| 273 | }
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| 274 | break;
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[483] | 275 | case 1:
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| 276 | {
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| 277 | const char *err;
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| 278 | if((err = geturl(optarg, args)))
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| 279 | {
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| 280 | fprintf(stderr, "%s\n\n", err);
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| 281 | res = 0;
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| 282 | }
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| 283 | }
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| 284 | break;
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| 285 | case -1: break;
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| 286 | }
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| 287 | } while(getoptr != -1 && res);
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| 288 |
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| 289 | for(a = revisionstr+11; *a && *a != ' '; ++a)
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| 290 | revisionstr[i++] = *a;
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| 291 | revisionstr[i] = 0;
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| 292 | datestr[0] = datestr[7];
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| 293 | datestr[1] = datestr[8];
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| 294 | datestr[2] = datestr[9];
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| 295 | datestr[3] = datestr[10];
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| 296 | datestr[5] = datestr[12];
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| 297 | datestr[6] = datestr[13];
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| 298 | datestr[8] = datestr[15];
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| 299 | datestr[9] = datestr[16];
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| 300 | datestr[4] = datestr[7] = '-';
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| 301 | datestr[10] = 0;
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| 302 |
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| 303 | if(!res || help)
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| 304 | {
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| 305 | fprintf(stderr, "Version %s (%s) GPL" COMPILEDATE "\nUsage:\n%s -s server -u user ...\n"
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[494] | 306 | " -d " LONG_OPT("--data ") "the requested data set\n"
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| 307 | " -s " LONG_OPT("--server ") "the server name or address\n"
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| 308 | " -p " LONG_OPT("--password ") "the login password\n"
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| 309 | " -r " LONG_OPT("--port ") "the server port number (default 2101)\n"
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| 310 | " -u " LONG_OPT("--user ") "the user name\n"
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| 311 | " -n " LONG_OPT("--nmea ") "NMEA string for sending to server\n"
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| 312 | " -b " LONG_OPT("--bitrate ") "output bitrate\n"
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| 313 | " -S " LONG_OPT("--proxyhost ") "proxy name or address\n"
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| 314 | " -R " LONG_OPT("--proxyport ") "proxy port, optional (default 2101)\n"
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| 315 | " -M " LONG_OPT("--mode ") "mode for data request\n"
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| 316 | " Valid modes are:\n"
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| 317 | " 1, h, http NTRIP Version 2.0 Caster in TCP/IP mode\n"
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| 318 | " 2, r, rtsp NTRIP Version 2.0 Caster in RTSP/RTP mode\n"
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| 319 | " 3, n, ntrip1 NTRIP Version 1.0 Caster\n"
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| 320 | " 4, a, auto automatic detection (default)\n"
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[496] | 321 | "or using an URL:\n%s ntrip:data[/user[:password]][@[server][:port][@proxyhost[:proxyport]]][;nmea]\n"
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[483] | 322 | , revisionstr, datestr, argv[0], argv[0]);
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| 323 | exit(1);
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| 324 | }
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| 325 | return res;
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| 326 | }
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| 327 |
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| 328 | static const char encodingTable [64] = {
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| 329 | 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
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| 330 | 'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
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| 331 | 'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
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| 332 | 'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'
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| 333 | };
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| 334 |
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| 335 | /* does not buffer overrun, but breaks directly after an error */
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| 336 | /* returns the number of required bytes */
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| 337 | static int encode(char *buf, int size, const char *user, const char *pwd)
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| 338 | {
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| 339 | unsigned char inbuf[3];
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| 340 | char *out = buf;
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| 341 | int i, sep = 0, fill = 0, bytes = 0;
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| 342 |
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| 343 | while(*user || *pwd)
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| 344 | {
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| 345 | i = 0;
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| 346 | while(i < 3 && *user) inbuf[i++] = *(user++);
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| 347 | if(i < 3 && !sep) {inbuf[i++] = ':'; ++sep; }
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| 348 | while(i < 3 && *pwd) inbuf[i++] = *(pwd++);
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| 349 | while(i < 3) {inbuf[i++] = 0; ++fill; }
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| 350 | if(out-buf < size-1)
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| 351 | *(out++) = encodingTable[(inbuf [0] & 0xFC) >> 2];
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| 352 | if(out-buf < size-1)
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| 353 | *(out++) = encodingTable[((inbuf [0] & 0x03) << 4)
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| 354 | | ((inbuf [1] & 0xF0) >> 4)];
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| 355 | if(out-buf < size-1)
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| 356 | {
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| 357 | if(fill == 2)
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| 358 | *(out++) = '=';
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| 359 | else
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| 360 | *(out++) = encodingTable[((inbuf [1] & 0x0F) << 2)
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| 361 | | ((inbuf [2] & 0xC0) >> 6)];
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| 362 | }
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| 363 | if(out-buf < size-1)
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| 364 | {
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| 365 | if(fill >= 1)
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| 366 | *(out++) = '=';
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| 367 | else
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| 368 | *(out++) = encodingTable[inbuf [2] & 0x3F];
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| 369 | }
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| 370 | bytes += 4;
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| 371 | }
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| 372 | if(out-buf < size)
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| 373 | *out = 0;
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| 374 | return bytes;
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| 375 | }
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| 376 |
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| 377 | int main(int argc, char **argv)
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| 378 | {
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| 379 | struct Args args;
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| 380 |
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| 381 | setbuf(stdout, 0);
|
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| 382 | setbuf(stdin, 0);
|
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| 383 | setbuf(stderr, 0);
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| 384 | signal(SIGALRM,sighandler_alarm);
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[494] | 385 | signal(SIGINT,sighandler_int);
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[483] | 386 | alarm(ALARMTIME);
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| 387 |
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| 388 | if(getargs(argc, argv, &args))
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| 389 | {
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[494] | 390 | int sleeptime = 0;
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[483] | 391 |
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[494] | 392 | do
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[483] | 393 | {
|
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[494] | 394 | int sockfd, numbytes;
|
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| 395 | char buf[MAXDATASIZE];
|
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| 396 | struct sockaddr_in their_addr; /* connector's address information */
|
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| 397 | struct hostent *he;
|
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| 398 | struct servent *se;
|
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| 399 | const char *server, *port, *proxyserver = 0;
|
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| 400 | char proxyport[6];
|
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| 401 | char *b;
|
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| 402 | long i;
|
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| 403 | if(sleeptime)
|
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| 404 | {
|
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| 405 | sleep(sleeptime);
|
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| 406 | sleeptime += 2;
|
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| 407 | }
|
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| 408 | else
|
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| 409 | {
|
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| 410 | sleeptime = 1;
|
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| 411 | }
|
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| 412 | alarm(ALARMTIME);
|
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| 413 | if(args.proxyhost)
|
---|
| 414 | {
|
---|
| 415 | int p;
|
---|
| 416 | if((i = strtol(args.port, &b, 10)) && (!b || !*b))
|
---|
| 417 | p = i;
|
---|
| 418 | else if(!(se = getservbyname(args.port, 0)))
|
---|
| 419 | {
|
---|
| 420 | fprintf(stderr, "Can't resolve port %s.", args.port);
|
---|
| 421 | exit(1);
|
---|
| 422 | }
|
---|
| 423 | else
|
---|
| 424 | {
|
---|
| 425 | p = ntohs(se->s_port);
|
---|
| 426 | }
|
---|
| 427 | snprintf(proxyport, sizeof(proxyport), "%d", p);
|
---|
| 428 | port = args.proxyport;
|
---|
| 429 | proxyserver = args.server;
|
---|
| 430 | server = args.proxyhost;
|
---|
| 431 | }
|
---|
| 432 | else
|
---|
| 433 | {
|
---|
| 434 | server = args.server;
|
---|
| 435 | port = args.port;
|
---|
| 436 | }
|
---|
[483] | 437 |
|
---|
[494] | 438 | memset(&their_addr, 0, sizeof(struct sockaddr_in));
|
---|
| 439 | if((i = strtol(port, &b, 10)) && (!b || !*b))
|
---|
| 440 | their_addr.sin_port = htons(i);
|
---|
| 441 | else if(!(se = getservbyname(port, 0)))
|
---|
[483] | 442 | {
|
---|
[494] | 443 | fprintf(stderr, "Can't resolve port %s.", port);
|
---|
[483] | 444 | exit(1);
|
---|
| 445 | }
|
---|
[494] | 446 | else
|
---|
[483] | 447 | {
|
---|
[494] | 448 | their_addr.sin_port = se->s_port;
|
---|
| 449 | }
|
---|
| 450 | if(!(he=gethostbyname(server)))
|
---|
| 451 | {
|
---|
| 452 | fprintf(stderr, "Server name lookup failed for '%s'.\n", server);
|
---|
[483] | 453 | exit(1);
|
---|
| 454 | }
|
---|
[494] | 455 | if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
|
---|
[483] | 456 | {
|
---|
[494] | 457 | perror("socket");
|
---|
| 458 | exit(1);
|
---|
| 459 | }
|
---|
| 460 | their_addr.sin_family = AF_INET;
|
---|
| 461 | their_addr.sin_addr = *((struct in_addr *)he->h_addr);
|
---|
| 462 |
|
---|
| 463 | if(args.data && args.mode == RTSP)
|
---|
| 464 | {
|
---|
| 465 | struct sockaddr_in local;
|
---|
| 466 | int sockudp, localport;
|
---|
| 467 | int cseq = 1;
|
---|
| 468 | socklen_t len;
|
---|
| 469 |
|
---|
| 470 | if((sockudp = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
|
---|
| 471 | {
|
---|
| 472 | perror("socket");
|
---|
| 473 | exit(1);
|
---|
| 474 | }
|
---|
| 475 | /* fill structure with local address information for UDP */
|
---|
| 476 | memset(&local, 0, sizeof(local));
|
---|
| 477 | local.sin_family = AF_INET;
|
---|
| 478 | local.sin_port = htons(0);
|
---|
| 479 | local.sin_addr.s_addr = htonl(INADDR_ANY);
|
---|
| 480 | len = sizeof(local);
|
---|
| 481 | /* bind() in order to get a random RTP client_port */
|
---|
| 482 | if((bind(sockudp, (struct sockaddr *)&local, len)) < 0)
|
---|
| 483 | {
|
---|
| 484 | perror("bind");
|
---|
| 485 | exit(1);
|
---|
| 486 | }
|
---|
| 487 | if((getsockname(sockudp, (struct sockaddr*)&local, &len)) != -1)
|
---|
| 488 | {
|
---|
| 489 | localport = ntohs(local.sin_port);
|
---|
| 490 | }
|
---|
[483] | 491 | else
|
---|
| 492 | {
|
---|
[494] | 493 | perror("local access failed");
|
---|
[483] | 494 | exit(1);
|
---|
| 495 | }
|
---|
[494] | 496 | if(connect(sockfd, (struct sockaddr *)&their_addr,
|
---|
| 497 | sizeof(struct sockaddr)) == -1)
|
---|
[483] | 498 | {
|
---|
[494] | 499 | perror("connect");
|
---|
| 500 | exit(1);
|
---|
| 501 | }
|
---|
| 502 | i=snprintf(buf, MAXDATASIZE-40, /* leave some space for login */
|
---|
| 503 | "SETUP rtsp://%s%s%s/%s RTSP/1.0\r\n"
|
---|
| 504 | "CSeq: %d\r\n"
|
---|
| 505 | "Ntrip-Version: Ntrip/2.0\r\n"
|
---|
| 506 | "Ntrip-Component: Ntripclient\r\n"
|
---|
| 507 | "User-Agent: %s/%s\r\n"
|
---|
| 508 | "Transport: RTP/GNSS;unicast;client_port=%u\r\n"
|
---|
| 509 | "Authorization: Basic ",
|
---|
| 510 | args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
|
---|
| 511 | args.data, cseq++, AGENTSTRING, revisionstr, localport);
|
---|
| 512 | if(i > MAXDATASIZE-40 || i < 0) /* second check for old glibc */
|
---|
| 513 | {
|
---|
| 514 | fprintf(stderr, "Requested data too long\n");
|
---|
| 515 | exit(1);
|
---|
| 516 | }
|
---|
| 517 | i += encode(buf+i, MAXDATASIZE-i-4, args.user, args.password);
|
---|
| 518 | if(i > MAXDATASIZE-4)
|
---|
| 519 | {
|
---|
| 520 | fprintf(stderr, "Username and/or password too long\n");
|
---|
| 521 | exit(1);
|
---|
| 522 | }
|
---|
| 523 | buf[i++] = '\r';
|
---|
| 524 | buf[i++] = '\n';
|
---|
| 525 | buf[i++] = '\r';
|
---|
| 526 | buf[i++] = '\n';
|
---|
| 527 | if(args.nmea)
|
---|
| 528 | {
|
---|
| 529 | int j = snprintf(buf+i, MAXDATASIZE-i, "%s\r\n", args.nmea);
|
---|
| 530 | if(j >= 0 && j < MAXDATASIZE-i)
|
---|
| 531 | i += j;
|
---|
| 532 | else
|
---|
[483] | 533 | {
|
---|
[494] | 534 | fprintf(stderr, "NMEA string too long\n");
|
---|
| 535 | exit(1);
|
---|
| 536 | }
|
---|
| 537 | }
|
---|
| 538 | if(send(sockfd, buf, (size_t)i, 0) != i)
|
---|
| 539 | {
|
---|
| 540 | perror("send");
|
---|
| 541 | exit(1);
|
---|
| 542 | }
|
---|
| 543 | if((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1)
|
---|
| 544 | {
|
---|
| 545 | if(numbytes >= 17 && !strncmp(buf, "RTSP/1.0 200 OK\r\n", 17))
|
---|
| 546 | {
|
---|
| 547 | int serverport = 0, session = 0;
|
---|
| 548 | const char *portcheck = "server_port=";
|
---|
| 549 | const char *sessioncheck = "session: ";
|
---|
| 550 | int l = strlen(portcheck)-1;
|
---|
| 551 | int j=0;
|
---|
| 552 | for(i = 0; j != l && i < numbytes-l; ++i)
|
---|
[483] | 553 | {
|
---|
[494] | 554 | for(j = 0; j < l && tolower(buf[i+j]) == portcheck[j]; ++j)
|
---|
| 555 | ;
|
---|
[483] | 556 | }
|
---|
[494] | 557 | if(i == numbytes-l)
|
---|
| 558 | {
|
---|
| 559 | fprintf(stderr, "No server port number found\n");
|
---|
| 560 | exit(1);
|
---|
| 561 | }
|
---|
| 562 | else
|
---|
| 563 | {
|
---|
| 564 | i+=l;
|
---|
| 565 | while(i < numbytes && buf[i] >= '0' && buf[i] <= '9')
|
---|
| 566 | serverport = serverport * 10 + buf[i++]-'0';
|
---|
| 567 | if(buf[i] != '\r' && buf[i] != ';')
|
---|
| 568 | {
|
---|
| 569 | fprintf(stderr, "Could not extract server port\n");
|
---|
| 570 | exit(1);
|
---|
| 571 | }
|
---|
| 572 | }
|
---|
| 573 | l = strlen(sessioncheck)-1;
|
---|
| 574 | j=0;
|
---|
| 575 | for(i = 0; j != l && i < numbytes-l; ++i)
|
---|
| 576 | {
|
---|
| 577 | for(j = 0; j < l && tolower(buf[i+j]) == sessioncheck[j]; ++j)
|
---|
| 578 | ;
|
---|
| 579 | }
|
---|
| 580 | if(i == numbytes-l)
|
---|
| 581 | {
|
---|
| 582 | fprintf(stderr, "No session number found\n");
|
---|
| 583 | exit(1);
|
---|
| 584 | }
|
---|
| 585 | else
|
---|
| 586 | {
|
---|
| 587 | i+=l;
|
---|
| 588 | while(i < numbytes && buf[i] >= '0' && buf[i] <= '9')
|
---|
| 589 | session = session * 10 + buf[i++]-'0';
|
---|
| 590 | if(buf[i] != '\r')
|
---|
| 591 | {
|
---|
| 592 | fprintf(stderr, "Could not extract session number\n");
|
---|
| 593 | exit(1);
|
---|
| 594 | }
|
---|
| 595 | }
|
---|
| 596 |
|
---|
| 597 | i = snprintf(buf, MAXDATASIZE,
|
---|
| 598 | "PLAY rtsp://%s%s%s/%s RTSP/1.0\r\n"
|
---|
| 599 | "CSeq: %d\r\n"
|
---|
| 600 | "Session: %d\r\n"
|
---|
| 601 | "\r\n",
|
---|
| 602 | args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
|
---|
| 603 | args.data, cseq++, session);
|
---|
| 604 |
|
---|
| 605 | if(i > MAXDATASIZE || i < 0) /* second check for old glibc */
|
---|
| 606 | {
|
---|
| 607 | fprintf(stderr, "Requested data too long\n");
|
---|
| 608 | exit(1);
|
---|
| 609 | }
|
---|
| 610 | if(send(sockfd, buf, (size_t)i, 0) != i)
|
---|
| 611 | {
|
---|
| 612 | perror("send");
|
---|
| 613 | exit(1);
|
---|
| 614 | }
|
---|
| 615 | if((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1)
|
---|
| 616 | {
|
---|
| 617 | if(numbytes >= 17 && !strncmp(buf, "RTSP/1.0 200 OK\r\n", 17))
|
---|
| 618 | {
|
---|
| 619 | struct sockaddr_in addrRTP;
|
---|
| 620 | /* fill structure with caster address information for UDP */
|
---|
| 621 | memset(&addrRTP, 0, sizeof(addrRTP));
|
---|
| 622 | addrRTP.sin_family = AF_INET;
|
---|
| 623 | addrRTP.sin_port = htons(serverport);
|
---|
| 624 | their_addr.sin_addr = *((struct in_addr *)he->h_addr);
|
---|
| 625 | len = sizeof(addrRTP);
|
---|
| 626 | int ts = 0;
|
---|
| 627 | int sn = 0;
|
---|
| 628 | int ssrc = 0;
|
---|
| 629 | int init = 0;
|
---|
| 630 | int u, v, w;
|
---|
| 631 | while(!stop && (i = recvfrom(sockudp, buf, 1526, 0,
|
---|
| 632 | (struct sockaddr*) &addrRTP, &len)) > 0)
|
---|
| 633 | {
|
---|
| 634 | alarm(ALARMTIME);
|
---|
| 635 | if(i >= 12+1 && (unsigned char)buf[0] == (2 << 6) && buf[1] == 0x60)
|
---|
| 636 | {
|
---|
| 637 | u= ((unsigned char)buf[2]<<8)+(unsigned char)buf[3];
|
---|
| 638 | v = ((unsigned char)buf[4]<<24)+((unsigned char)buf[5]<<16)
|
---|
| 639 | +((unsigned char)buf[6]<<8)+(unsigned char)buf[7];
|
---|
| 640 | w = ((unsigned char)buf[8]<<24)+((unsigned char)buf[9]<<16)
|
---|
| 641 | +((unsigned char)buf[10]<<8)+(unsigned char)buf[11];
|
---|
| 642 |
|
---|
| 643 | if(init)
|
---|
| 644 | {
|
---|
| 645 | if(u < -30000 && sn > 30000) sn -= 0xFFFF;
|
---|
| 646 | if(ssrc != w || ts > v)
|
---|
| 647 | {
|
---|
| 648 | fprintf(stderr, "Illegal UDP data received.\n");
|
---|
| 649 | exit(1);
|
---|
| 650 | }
|
---|
| 651 | if(u > sn) /* don't show out-of-order packets */
|
---|
| 652 | fwrite(buf+12, (size_t)i-12, 1, stdout);
|
---|
| 653 | }
|
---|
| 654 | sn = u; ts = v; ssrc = w; init = 1;
|
---|
| 655 | }
|
---|
| 656 | else
|
---|
| 657 | {
|
---|
| 658 | fprintf(stderr, "Illegal UDP header.\n");
|
---|
| 659 | exit(1);
|
---|
| 660 | }
|
---|
| 661 | }
|
---|
| 662 | }
|
---|
| 663 | i = snprintf(buf, MAXDATASIZE,
|
---|
| 664 | "TEARDOWN rtsp://%s%s%s/%s RTSP/1.0\r\n"
|
---|
| 665 | "CSeq: %d\r\n"
|
---|
| 666 | "Session: %d\r\n"
|
---|
| 667 | "\r\n",
|
---|
| 668 | args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
|
---|
| 669 | args.data, cseq++, session);
|
---|
| 670 |
|
---|
| 671 | if(i > MAXDATASIZE || i < 0) /* second check for old glibc */
|
---|
| 672 | {
|
---|
| 673 | fprintf(stderr, "Requested data too long\n");
|
---|
| 674 | exit(1);
|
---|
| 675 | }
|
---|
| 676 | if(send(sockfd, buf, (size_t)i, 0) != i)
|
---|
| 677 | {
|
---|
| 678 | perror("send");
|
---|
| 679 | exit(1);
|
---|
| 680 | }
|
---|
| 681 | }
|
---|
| 682 | else
|
---|
| 683 | {
|
---|
| 684 | fprintf(stderr, "Could not start data stream.\n");
|
---|
| 685 | exit(1);
|
---|
| 686 | }
|
---|
| 687 | }
|
---|
| 688 | else
|
---|
| 689 | {
|
---|
| 690 | fprintf(stderr, "Could not setup initial control connection.\n");
|
---|
[483] | 691 | exit(1);
|
---|
| 692 | }
|
---|
| 693 | }
|
---|
| 694 | else
|
---|
| 695 | {
|
---|
[494] | 696 | perror("recv");
|
---|
| 697 | exit(1);
|
---|
| 698 | }
|
---|
| 699 | }
|
---|
| 700 | else
|
---|
| 701 | {
|
---|
| 702 | if(connect(sockfd, (struct sockaddr *)&their_addr,
|
---|
| 703 | sizeof(struct sockaddr)) == -1)
|
---|
| 704 | {
|
---|
| 705 | perror("connect");
|
---|
| 706 | exit(1);
|
---|
| 707 | }
|
---|
| 708 | if(!args.data)
|
---|
| 709 | {
|
---|
| 710 | i = snprintf(buf, MAXDATASIZE,
|
---|
| 711 | "GET %s%s%s%s/ HTTP/1.0\r\n"
|
---|
| 712 | "Host: %s\r\n%s"
|
---|
| 713 | "User-Agent: %s/%s\r\n"
|
---|
| 714 | "\r\n"
|
---|
| 715 | , proxyserver ? "http://" : "", proxyserver ? proxyserver : "",
|
---|
| 716 | proxyserver ? ":" : "", proxyserver ? proxyport : "",
|
---|
| 717 | args.server, args.mode == NTRIP1 ? "" : "Ntrip-Version: Ntrip/2.0\r\n",
|
---|
| 718 | AGENTSTRING, revisionstr);
|
---|
| 719 | }
|
---|
| 720 | else
|
---|
| 721 | {
|
---|
| 722 | i=snprintf(buf, MAXDATASIZE-40, /* leave some space for login */
|
---|
| 723 | "GET %s%s%s%s/%s HTTP/1.0\r\n"
|
---|
| 724 | "Host: %s\r\n%s"
|
---|
| 725 | "User-Agent: %s/%s\r\n"
|
---|
| 726 | "Authorization: Basic "
|
---|
| 727 | , proxyserver ? "http://" : "", proxyserver ? proxyserver : "",
|
---|
| 728 | proxyserver ? ":" : "", proxyserver ? proxyport : "",
|
---|
| 729 | args.data, args.server,
|
---|
| 730 | args.mode == NTRIP1 ? "" : "Ntrip-Version: Ntrip/2.0\r\n",
|
---|
| 731 | AGENTSTRING, revisionstr);
|
---|
| 732 | if(i > MAXDATASIZE-40 || i < 0) /* second check for old glibc */
|
---|
[483] | 733 | {
|
---|
[494] | 734 | fprintf(stderr, "Requested data too long\n");
|
---|
| 735 | exit(1);
|
---|
[483] | 736 | }
|
---|
[494] | 737 | i += encode(buf+i, MAXDATASIZE-i-4, args.user, args.password);
|
---|
| 738 | if(i > MAXDATASIZE-4)
|
---|
[483] | 739 | {
|
---|
[494] | 740 | fprintf(stderr, "Username and/or password too long\n");
|
---|
| 741 | exit(1);
|
---|
| 742 | }
|
---|
| 743 | buf[i++] = '\r';
|
---|
| 744 | buf[i++] = '\n';
|
---|
| 745 | buf[i++] = '\r';
|
---|
| 746 | buf[i++] = '\n';
|
---|
| 747 | if(args.nmea)
|
---|
| 748 | {
|
---|
| 749 | int j = snprintf(buf+i, MAXDATASIZE-i, "%s\r\n", args.nmea);
|
---|
| 750 | if(j >= 0 && j < MAXDATASIZE-i)
|
---|
| 751 | i += j;
|
---|
| 752 | else
|
---|
[483] | 753 | {
|
---|
[494] | 754 | fprintf(stderr, "NMEA string too long\n");
|
---|
| 755 | exit(1);
|
---|
[483] | 756 | }
|
---|
| 757 | }
|
---|
| 758 | }
|
---|
[494] | 759 | if(send(sockfd, buf, (size_t)i, 0) != i)
|
---|
| 760 | {
|
---|
| 761 | perror("send");
|
---|
| 762 | exit(1);
|
---|
| 763 | }
|
---|
| 764 | if(args.data)
|
---|
| 765 | {
|
---|
| 766 | int k = 0;
|
---|
| 767 | int chunkymode = 0;
|
---|
| 768 | int starttime = time(0);
|
---|
| 769 | int lastout = starttime;
|
---|
| 770 | int totalbytes = 0;
|
---|
| 771 | int chunksize = 0;
|
---|
| 772 |
|
---|
| 773 | while(!stop && (numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1)
|
---|
| 774 | {
|
---|
| 775 | alarm(ALARMTIME);
|
---|
| 776 | if(!k)
|
---|
| 777 | {
|
---|
| 778 | if(numbytes > 17 && (!strncmp(buf, "HTTP/1.1 200 OK\r\n", 17)
|
---|
| 779 | || !strncmp(buf, "HTTP/1.0 200 OK\r\n", 17)))
|
---|
| 780 | {
|
---|
| 781 | const char *datacheck = "Content-Type: gnss/data\r\n";
|
---|
| 782 | const char *chunkycheck = "Transfer-Encoding: chunked\r\n";
|
---|
| 783 | int l = strlen(datacheck)-1;
|
---|
| 784 | int j=0;
|
---|
| 785 | for(i = 0; j != l && i < numbytes-l; ++i)
|
---|
| 786 | {
|
---|
| 787 | for(j = 0; j < l && buf[i+j] == datacheck[j]; ++j)
|
---|
| 788 | ;
|
---|
| 789 | }
|
---|
| 790 | if(i == numbytes-l)
|
---|
| 791 | {
|
---|
| 792 | fprintf(stderr, "No 'Content-Type: gnss/data' found\n");
|
---|
| 793 | exit(1);
|
---|
| 794 | }
|
---|
| 795 | l = strlen(chunkycheck)-1;
|
---|
| 796 | j=0;
|
---|
| 797 | for(i = 0; j != l && i < numbytes-l; ++i)
|
---|
| 798 | {
|
---|
| 799 | for(j = 0; j < l && buf[i+j] == chunkycheck[j]; ++j)
|
---|
| 800 | ;
|
---|
| 801 | }
|
---|
| 802 | if(i < numbytes-l)
|
---|
| 803 | chunkymode = 1;
|
---|
| 804 | }
|
---|
| 805 | else if(numbytes < 12 || strncmp("ICY 200 OK\r\n", buf, 12))
|
---|
| 806 | {
|
---|
| 807 | fprintf(stderr, "Could not get the requested data: ");
|
---|
| 808 | for(k = 0; k < numbytes && buf[k] != '\n' && buf[k] != '\r'; ++k)
|
---|
| 809 | {
|
---|
| 810 | fprintf(stderr, "%c", isprint(buf[k]) ? buf[k] : '.');
|
---|
| 811 | }
|
---|
| 812 | fprintf(stderr, "\n");
|
---|
| 813 | exit(1);
|
---|
| 814 | }
|
---|
| 815 | else if(args.mode != NTRIP1)
|
---|
| 816 | {
|
---|
| 817 | fprintf(stderr, "NTRIP version 2 HTTP connection failed%s.\n",
|
---|
| 818 | args.mode == AUTO ? ", falling back to NTRIP1" : "");
|
---|
| 819 | if(args.mode == HTTP)
|
---|
| 820 | exit(1);
|
---|
| 821 | }
|
---|
| 822 | ++k;
|
---|
| 823 | }
|
---|
| 824 | else
|
---|
| 825 | {
|
---|
| 826 | sleeptime = 0;
|
---|
| 827 | if(chunkymode)
|
---|
| 828 | {
|
---|
| 829 | int stop = 0;
|
---|
| 830 | int pos = 0;
|
---|
| 831 | while(!stop && pos < numbytes)
|
---|
| 832 | {
|
---|
| 833 | switch(chunkymode)
|
---|
| 834 | {
|
---|
| 835 | case 1: /* reading number starts */
|
---|
| 836 | chunksize = 0;
|
---|
| 837 | ++chunkymode; /* no break */
|
---|
| 838 | case 2: /* during reading number */
|
---|
| 839 | i = buf[pos++];
|
---|
| 840 | if(i >= '0' && i <= '9') chunksize = chunksize*16+i-'0';
|
---|
| 841 | else if(i >= 'a' && i <= 'f') chunksize = chunksize*16+i-'a'+10;
|
---|
| 842 | else if(i >= 'A' && i <= 'F') chunksize = chunksize*16+i-'A'+10;
|
---|
| 843 | else if(i == '\r') ++chunkymode;
|
---|
| 844 | else stop = 1;
|
---|
| 845 | break;
|
---|
| 846 | case 3: /* scanning for return */
|
---|
| 847 | if(buf[pos++] == '\n') chunkymode = chunksize ? 4 : 1;
|
---|
| 848 | else stop = 1;
|
---|
| 849 | break;
|
---|
| 850 | case 4: /* output data */
|
---|
| 851 | i = numbytes-pos;
|
---|
| 852 | if(i > chunksize) i = chunksize;
|
---|
| 853 | fwrite(buf+pos, (size_t)i, 1, stdout);
|
---|
| 854 | totalbytes += i;
|
---|
| 855 | chunksize -= i;
|
---|
| 856 | pos += i;
|
---|
| 857 | if(!chunksize)
|
---|
| 858 | chunkymode = 1;
|
---|
| 859 | break;
|
---|
| 860 | }
|
---|
| 861 | }
|
---|
| 862 | if(stop)
|
---|
| 863 | {
|
---|
| 864 | fprintf(stderr, "Error in chunky transfer encoding\n");
|
---|
| 865 | break;
|
---|
| 866 | }
|
---|
| 867 | }
|
---|
| 868 | else
|
---|
| 869 | {
|
---|
| 870 | totalbytes += numbytes;
|
---|
| 871 | fwrite(buf, (size_t)numbytes, 1, stdout);
|
---|
| 872 | }
|
---|
| 873 | fflush(stdout);
|
---|
| 874 | if(totalbytes < 0) /* overflow */
|
---|
| 875 | {
|
---|
| 876 | totalbytes = 0;
|
---|
| 877 | starttime = time(0);
|
---|
| 878 | lastout = starttime;
|
---|
| 879 | }
|
---|
| 880 | if(args.bitrate)
|
---|
| 881 | {
|
---|
| 882 | int t = time(0);
|
---|
| 883 | if(t > lastout + 60)
|
---|
| 884 | {
|
---|
| 885 | lastout = t;
|
---|
| 886 | fprintf(stderr, "Bitrate is %dbyte/s (%d seconds accumulated).\n",
|
---|
| 887 | totalbytes/(t-starttime), t-starttime);
|
---|
| 888 | }
|
---|
| 889 | }
|
---|
| 890 | }
|
---|
| 891 | }
|
---|
| 892 | }
|
---|
| 893 | else
|
---|
| 894 | {
|
---|
| 895 | sleeptime = 0;
|
---|
| 896 | while(!stop && (numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) > 0)
|
---|
| 897 | {
|
---|
| 898 | alarm(ALARMTIME);
|
---|
| 899 | fwrite(buf, (size_t)numbytes, 1, stdout);
|
---|
| 900 | }
|
---|
| 901 | }
|
---|
| 902 | close(sockfd);
|
---|
[483] | 903 | }
|
---|
[494] | 904 | } while(args.data && !stop);
|
---|
[483] | 905 | }
|
---|
| 906 | return 0;
|
---|
| 907 | }
|
---|