source: ntrip/trunk/ntripclient/ntripclient.c@ 842

Last change on this file since 842 was 842, checked in by stoecker, 16 years ago

added serial logfile and reconnects
File size: 41.6 KB
Line 
1/*
2 NTRIP client for POSIX.
3 $Id: ntripclient.c,v 1.43 2008/04/15 13:27:49 stoecker Exp $
4 Copyright (C) 2003-2008 by Dirk Stöcker <soft@dstoecker.de>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 or read http://www.gnu.org/licenses/gpl.txt
20*/
21
22#include <ctype.h>
23#include <getopt.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <errno.h>
27#include <string.h>
28#include <time.h>
29
30#include "serial.c"
31
32#ifdef WINDOWSVERSION
33 #include <winsock.h>
34 typedef SOCKET sockettype;
35 typedef u_long in_addr_t;
36 typedef size_t socklen_t;
37#else
38 typedef int sockettype;
39 #include <signal.h>
40 #include <fcntl.h>
41 #include <unistd.h>
42 #include <arpa/inet.h>
43 #include <sys/socket.h>
44 #include <netinet/in.h>
45 #include <netdb.h>
46
47 #define closesocket(sock) close(sock)
48 #define ALARMTIME (2*60)
49#endif
50
51#ifndef COMPILEDATE
52#define COMPILEDATE " built " __DATE__
53#endif
54
55/* The string, which is send as agent in HTTP request */
56#define AGENTSTRING "NTRIP NtripClientPOSIX"
57
58#define MAXDATASIZE 1000 /* max number of bytes we can get at once */
59
60/* CVS revision and version */
61static char revisionstr[] = "$Revision: 1.43 $";
62static char datestr[] = "$Date: 2008/04/15 13:27:49 $";
63
64enum MODE { HTTP = 1, RTSP = 2, NTRIP1 = 3, AUTO = 4, END };
65
66struct Args
67{
68 const char *server;
69 const char *port;
70 const char *user;
71 const char *proxyhost;
72 const char *proxyport;
73 const char *password;
74 const char *nmea;
75 const char *data;
76 int bitrate;
77 int mode;
78
79 int udpport;
80 int initudp;
81 enum SerialBaud baud;
82 enum SerialDatabits databits;
83 enum SerialStopbits stopbits;
84 enum SerialParity parity;
85 enum SerialProtocol protocol;
86 const char *serdevice;
87 const char *serlogfile;
88};
89
90/* option parsing */
91#ifdef NO_LONG_OPTS
92#define LONG_OPT(a)
93#else
94#define LONG_OPT(a) a
95static struct option opts[] = {
96{ "bitrate", no_argument, 0, 'b'},
97{ "data", required_argument, 0, 'd'}, /* compatibility */
98{ "mountpoint", required_argument, 0, 'm'},
99{ "initudp", no_argument, 0, 'I'},
100{ "udpport", required_argument, 0, 'P'},
101{ "server", required_argument, 0, 's'},
102{ "password", required_argument, 0, 'p'},
103{ "port", required_argument, 0, 'r'},
104{ "proxyport", required_argument, 0, 'R'},
105{ "proxyhost", required_argument, 0, 'S'},
106{ "user", required_argument, 0, 'u'},
107{ "nmea", required_argument, 0, 'n'},
108{ "mode", required_argument, 0, 'M'},
109{ "serdevice", required_argument, 0, 'D'},
110{ "baud", required_argument, 0, 'B'},
111{ "stopbits", required_argument, 0, 'T'},
112{ "protocol", required_argument, 0, 'C'},
113{ "parity", required_argument, 0, 'Y'},
114{ "databits", required_argument, 0, 'A'},
115{ "serlogfile", required_argument, 0, 'l'},
116{ "help", no_argument, 0, 'h'},
117{0,0,0,0}};
118#endif
119#define ARGOPT "-d:m:bhp:r:s:u:n:S:R:M:IP:D:B:T:C:Y:A:l:"
120
121int stop = 0;
122#ifndef WINDOWSVERSION
123#ifdef __GNUC__
124static __attribute__ ((noreturn)) void sighandler_alarm(
125int sig __attribute__((__unused__)))
126#else /* __GNUC__ */
127static void sighandler_alarm(int sig)
128#endif /* __GNUC__ */
129{
130 fprintf(stderr, "ERROR: more than %d seconds no activity\n", ALARMTIME);
131 exit(1);
132}
133
134#ifdef __GNUC__
135static void sighandler_int(int sig __attribute__((__unused__)))
136#else /* __GNUC__ */
137static void sighandler_alarm(int sig)
138#endif /* __GNUC__ */
139{
140 alarm(2);
141 stop = 1;
142}
143#endif /* WINDOWSVERSION */
144
145static const char *encodeurl(const char *req)
146{
147 char *h = "0123456789abcdef";
148 static char buf[128];
149 char *urlenc = buf;
150 char *bufend = buf + sizeof(buf) - 3;
151
152 while(*req && urlenc < bufend)
153 {
154 if(isalnum(*req)
155 || *req == '-' || *req == '_' || *req == '.')
156 *urlenc++ = *req++;
157 else
158 {
159 *urlenc++ = '%';
160 *urlenc++ = h[*req >> 4];
161 *urlenc++ = h[*req & 0x0f];
162 req++;
163 }
164 }
165 *urlenc = 0;
166 return buf;
167}
168
169static const char *geturl(const char *url, struct Args *args)
170{
171 static char buf[1000];
172 static char *Buffer = buf;
173 static char *Bufend = buf+sizeof(buf);
174 char *h = "0123456789abcdef";
175
176 if(strncmp("ntrip:", url, 6))
177 return "URL must start with 'ntrip:'.";
178 url += 6; /* skip ntrip: */
179
180 if(*url != '@' && *url != '/')
181 {
182 /* scan for mountpoint */
183 args->data = Buffer;
184 if(*url != '?')
185 {
186 while(*url && *url != '@' && *url != ';' && *url != '/' && Buffer != Bufend)
187 *(Buffer++) = *(url++);
188 }
189 else
190 {
191 while(*url && *url != '@' && *url != '/' && Buffer != Bufend)
192 {
193 if(isalnum(*url) || *url == '-' || *url == '_' || *url == '.')
194 *Buffer++ = *url++;
195 else
196 {
197 *Buffer++ = '%';
198 *Buffer++ = h[*url >> 4];
199 *Buffer++ = h[*url & 0x0f];
200 url++;
201 }
202 }
203 }
204 if(Buffer == args->data)
205 return "Mountpoint required.";
206 else if(Buffer >= Bufend-1)
207 return "Parsing buffer too short.";
208 *(Buffer++) = 0;
209 }
210
211 if(*url == '/') /* username and password */
212 {
213 ++url;
214 args->user = Buffer;
215 while(*url && *url != '@' && *url != ';' && *url != ':' && Buffer != Bufend)
216 *(Buffer++) = *(url++);
217 if(Buffer == args->user)
218 return "Username cannot be empty.";
219 else if(Buffer >= Bufend-1)
220 return "Parsing buffer too short.";
221 *(Buffer++) = 0;
222
223 if(*url == ':') ++url;
224
225 args->password = Buffer;
226 while(*url && *url != '@' && *url != ';' && Buffer != Bufend)
227 *(Buffer++) = *(url++);
228 if(Buffer == args->password)
229 return "Password cannot be empty.";
230 else if(Buffer >= Bufend-1)
231 return "Parsing buffer too short.";
232 *(Buffer++) = 0;
233 }
234
235 if(*url == '@') /* server */
236 {
237 ++url;
238 if(*url != '@' && *url != ':')
239 {
240 args->server = Buffer;
241 while(*url && *url != '@' && *url != ':' && *url != ';' && Buffer != Bufend)
242 *(Buffer++) = *(url++);
243 if(Buffer == args->server)
244 return "Servername cannot be empty.";
245 else if(Buffer >= Bufend-1)
246 return "Parsing buffer too short.";
247 *(Buffer++) = 0;
248 }
249
250 if(*url == ':')
251 {
252 ++url;
253 args->port = Buffer;
254 while(*url && *url != '@' && *url != ';' && Buffer != Bufend)
255 *(Buffer++) = *(url++);
256 if(Buffer == args->port)
257 return "Port cannot be empty.";
258 else if(Buffer >= Bufend-1)
259 return "Parsing buffer too short.";
260 *(Buffer++) = 0;
261 }
262
263 if(*url == '@') /* proxy */
264 {
265 ++url;
266 args->proxyhost = Buffer;
267 while(*url && *url != ':' && *url != ';' && Buffer != Bufend)
268 *(Buffer++) = *(url++);
269 if(Buffer == args->proxyhost)
270 return "Proxy servername cannot be empty.";
271 else if(Buffer >= Bufend-1)
272 return "Parsing buffer too short.";
273 *(Buffer++) = 0;
274
275 if(*url == ':')
276 {
277 ++url;
278 args->proxyport = Buffer;
279 while(*url && *url != ';' && Buffer != Bufend)
280 *(Buffer++) = *(url++);
281 if(Buffer == args->proxyport)
282 return "Proxy port cannot be empty.";
283 else if(Buffer >= Bufend-1)
284 return "Parsing buffer too short.";
285 *(Buffer++) = 0;
286 }
287 }
288 }
289 if(*url == ';') /* NMEA */
290 {
291 args->nmea = ++url;
292 while(*url)
293 ++url;
294 }
295
296 return *url ? "Garbage at end of server string." : 0;
297}
298
299static int getargs(int argc, char **argv, struct Args *args)
300{
301 int res = 1;
302 int getoptr;
303 char *a;
304 int i = 0, help = 0;
305
306 args->server = "www.euref-ip.net";
307 args->port = "2101";
308 args->user = "";
309 args->password = "";
310 args->nmea = 0;
311 args->data = 0;
312 args->bitrate = 0;
313 args->proxyhost = 0;
314 args->proxyport = "2101";
315 args->mode = AUTO;
316 args->initudp = 0;
317 args->udpport = 0;
318 args->protocol = SPAPROTOCOL_NONE;
319 args->parity = SPAPARITY_NONE;
320 args->stopbits = SPASTOPBITS_1;
321 args->databits = SPADATABITS_8;
322 args->baud = SPABAUD_9600;
323 args->serdevice = 0;
324 args->serlogfile = 0;
325 help = 0;
326
327 do
328 {
329#ifdef NO_LONG_OPTS
330 switch((getoptr = getopt(argc, argv, ARGOPT)))
331#else
332 switch((getoptr = getopt_long(argc, argv, ARGOPT, opts, 0)))
333#endif
334 {
335 case 's': args->server = optarg; break;
336 case 'u': args->user = optarg; break;
337 case 'p': args->password = optarg; break;
338 case 'd': /* legacy option, may get removed in future */
339 fprintf(stderr, "Option -d or --data is deprecated. Use -m instead.\n");
340 case 'm':
341 if(optarg && *optarg == '?')
342 args->data = encodeurl(optarg);
343 else
344 args->data = optarg;
345 break;
346 case 'B':
347 {
348 int i = strtol(optarg, 0, 10);
349
350 switch(i)
351 {
352 case 50: args->baud = SPABAUD_50; break;
353 case 110: args->baud = SPABAUD_110; break;
354 case 300: args->baud = SPABAUD_300; break;
355 case 600: args->baud = SPABAUD_600; break;
356 case 1200: args->baud = SPABAUD_1200; break;
357 case 2400: args->baud = SPABAUD_2400; break;
358 case 4800: args->baud = SPABAUD_4800; break;
359 case 9600: args->baud = SPABAUD_9600; break;
360 case 19200: args->baud = SPABAUD_19200; break;
361 case 38400: args->baud = SPABAUD_38400; break;
362 case 57600: args->baud = SPABAUD_57600; break;
363 case 115200: args->baud = SPABAUD_115200; break;
364 default:
365 fprintf(stderr, "Baudrate '%s' unknown\n", optarg);
366 res = 0;
367 break;
368 }
369 }
370 break;
371 case 'T':
372 if(!strcmp(optarg, "1")) args->stopbits = SPASTOPBITS_1;
373 else if(!strcmp(optarg, "2")) args->stopbits = SPASTOPBITS_2;
374 else
375 {
376 fprintf(stderr, "Stopbits '%s' unknown\n", optarg);
377 res = 0;
378 }
379 break;
380 case 'A':
381 if(!strcmp(optarg, "5")) args->databits = SPADATABITS_5;
382 else if(!strcmp(optarg, "6")) args->databits = SPADATABITS_6;
383 else if(!strcmp(optarg, "7")) args->databits = SPADATABITS_7;
384 else if(!strcmp(optarg, "8")) args->databits = SPADATABITS_8;
385 else
386 {
387 fprintf(stderr, "Databits '%s' unknown\n", optarg);
388 res = 0;
389 }
390 break;
391 case 'C':
392 {
393 int i = 0;
394 args->protocol = SerialGetProtocol(optarg, &i);
395 if(i)
396 {
397 fprintf(stderr, "Protocol '%s' unknown\n", optarg);
398 res = 0;
399 }
400 }
401 break;
402 case 'Y':
403 {
404 int i = 0;
405 args->parity = SerialGetParity(optarg, &i);
406 if(i)
407 {
408 fprintf(stderr, "Parity '%s' unknown\n", optarg);
409 res = 0;
410 }
411 }
412 break;
413 case 'D': args->serdevice = optarg; break;
414 case 'l': args->serlogfile = optarg; break;
415 case 'I': args->initudp = 1; break;
416 case 'P': args->udpport = strtol(optarg, 0, 10); break;
417 case 'n': args->nmea = optarg; break;
418 case 'b': args->bitrate = 1; break;
419 case 'h': help=1; break;
420 case 'r': args->port = optarg; break;
421 case 'S': args->proxyhost = optarg; break;
422 case 'R': args->proxyport = optarg; break;
423 case 'M':
424 args->mode = 0;
425 if (!strcmp(optarg,"n") || !strcmp(optarg,"ntrip1"))
426 args->mode = NTRIP1;
427 else if(!strcmp(optarg,"h") || !strcmp(optarg,"http"))
428 args->mode = HTTP;
429 else if(!strcmp(optarg,"r") || !strcmp(optarg,"rtsp"))
430 args->mode = RTSP;
431 else if(!strcmp(optarg,"a") || !strcmp(optarg,"auto"))
432 args->mode = AUTO;
433 else args->mode = atoi(optarg);
434 if((args->mode == 0) || (args->mode >= END))
435 {
436 fprintf(stderr, "Mode %s unknown\n", optarg);
437 res = 0;
438 }
439 break;
440 case 1:
441 {
442 const char *err;
443 if((err = geturl(optarg, args)))
444 {
445 fprintf(stderr, "%s\n\n", err);
446 res = 0;
447 }
448 }
449 break;
450 case -1: break;
451 }
452 } while(getoptr != -1 && res);
453
454 for(a = revisionstr+11; *a && *a != ' '; ++a)
455 revisionstr[i++] = *a;
456 revisionstr[i] = 0;
457 datestr[0] = datestr[7];
458 datestr[1] = datestr[8];
459 datestr[2] = datestr[9];
460 datestr[3] = datestr[10];
461 datestr[5] = datestr[12];
462 datestr[6] = datestr[13];
463 datestr[8] = datestr[15];
464 datestr[9] = datestr[16];
465 datestr[4] = datestr[7] = '-';
466 datestr[10] = 0;
467
468 if(!res || help)
469 {
470 fprintf(stderr, "Version %s (%s) GPL" COMPILEDATE "\nUsage:\n%s -s server -u user ...\n"
471 " -m " LONG_OPT("--mountpoint ") "the requested data set or sourcetable filtering criteria\n"
472 " -s " LONG_OPT("--server ") "the server name or address\n"
473 " -p " LONG_OPT("--password ") "the login password\n"
474 " -r " LONG_OPT("--port ") "the server port number (default 2101)\n"
475 " -u " LONG_OPT("--user ") "the user name\n"
476 " -M " LONG_OPT("--mode ") "mode for data request\n"
477 " Valid modes are:\n"
478 " 1, h, http NTRIP Version 2.0 Caster in TCP/IP mode\n"
479 " 2, r, rtsp NTRIP Version 2.0 Caster in RTSP/RTP mode\n"
480 " 3, n, ntrip1 NTRIP Version 1.0 Caster\n"
481 " 4, a, auto automatic detection (default)\n"
482 "or using an URL:\n%s ntrip:mountpoint[/user[:password]][@[server][:port][@proxyhost[:proxyport]]][;nmea]\n"
483 "\nExpert options:\n"
484 " -n " LONG_OPT("--nmea ") "NMEA string for sending to server\n"
485 " -b " LONG_OPT("--bitrate ") "output bitrate\n"
486 " -I " LONG_OPT("--initudp ") "send initial UDP packet for firewall handling\n"
487 " -P " LONG_OPT("--udpport ") "set the local UDP port\n"
488 " -S " LONG_OPT("--proxyhost ") "proxy name or address\n"
489 " -R " LONG_OPT("--proxyport ") "proxy port, optional (default 2101)\n"
490 "\nSerial input/output:\n"
491 " -D " LONG_OPT("--serdevice ") "serial device for output\n"
492 " -B " LONG_OPT("--baud ") "baudrate for serial device\n"
493 " -T " LONG_OPT("--stopbits ") "stopbits for serial device\n"
494 " -C " LONG_OPT("--protocol ") "protocol for serial device\n"
495 " -Y " LONG_OPT("--parity ") "parity for serial device\n"
496 " -A " LONG_OPT("--databits ") "databits for serial device\n"
497 " -l " LONG_OPT("--serlogfile ") "logfile for serial data\n"
498 , revisionstr, datestr, argv[0], argv[0]);
499 exit(1);
500 }
501 return res;
502}
503
504static const char encodingTable [64] = {
505 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
506 'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
507 'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
508 'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'
509};
510
511/* does not buffer overrun, but breaks directly after an error */
512/* returns the number of required bytes */
513static int encode(char *buf, int size, const char *user, const char *pwd)
514{
515 unsigned char inbuf[3];
516 char *out = buf;
517 int i, sep = 0, fill = 0, bytes = 0;
518
519 while(*user || *pwd)
520 {
521 i = 0;
522 while(i < 3 && *user) inbuf[i++] = *(user++);
523 if(i < 3 && !sep) {inbuf[i++] = ':'; ++sep; }
524 while(i < 3 && *pwd) inbuf[i++] = *(pwd++);
525 while(i < 3) {inbuf[i++] = 0; ++fill; }
526 if(out-buf < size-1)
527 *(out++) = encodingTable[(inbuf [0] & 0xFC) >> 2];
528 if(out-buf < size-1)
529 *(out++) = encodingTable[((inbuf [0] & 0x03) << 4)
530 | ((inbuf [1] & 0xF0) >> 4)];
531 if(out-buf < size-1)
532 {
533 if(fill == 2)
534 *(out++) = '=';
535 else
536 *(out++) = encodingTable[((inbuf [1] & 0x0F) << 2)
537 | ((inbuf [2] & 0xC0) >> 6)];
538 }
539 if(out-buf < size-1)
540 {
541 if(fill >= 1)
542 *(out++) = '=';
543 else
544 *(out++) = encodingTable[inbuf [2] & 0x3F];
545 }
546 bytes += 4;
547 }
548 if(out-buf < size)
549 *out = 0;
550 return bytes;
551}
552
553int main(int argc, char **argv)
554{
555 struct Args args;
556
557 setbuf(stdout, 0);
558 setbuf(stdin, 0);
559 setbuf(stderr, 0);
560#ifndef WINDOWSVERSION
561 signal(SIGALRM,sighandler_alarm);
562 signal(SIGINT,sighandler_int);
563 alarm(ALARMTIME);
564#else
565 WSADATA wsaData;
566 if(WSAStartup(MAKEWORD(1,1),&wsaData))
567 {
568 fprintf(stderr, "Could not init network access.\n");
569 return 20;
570 }
571#endif
572
573 if(getargs(argc, argv, &args))
574 {
575 struct serial sx;
576 FILE *ser = 0;
577 char nmeabuffer[200] = "$GPGGA,"; /* our start string */
578 size_t nmeabufpos = 0;
579 size_t nmeastarpos = 0;
580 int sleeptime = 0;
581 if(args.serdevice)
582 {
583 const char *e = SerialInit(&sx, args.serdevice, args.baud,
584 args.stopbits, args.protocol, args.parity, args.databits, 1);
585 if(e)
586 {
587 fprintf(stderr, "%s\n", e);
588 return 20;
589 }
590 if(args.serlogfile)
591 {
592 if(!(ser = fopen(args.serlogfile, "a+")))
593 {
594 SerialFree(&sx);
595 fprintf(stderr, "Could not open serial logfile.\n");
596 return 20;
597 }
598 }
599 }
600 do
601 {
602 int error = 0;
603 sockettype sockfd = 0;
604 int numbytes;
605 char buf[MAXDATASIZE];
606 struct sockaddr_in their_addr; /* connector's address information */
607 struct hostent *he;
608 struct servent *se;
609 const char *server, *port, *proxyserver = 0;
610 char proxyport[6];
611 char *b;
612 long i;
613 if(sleeptime)
614 {
615#ifdef WINDOWSVERSION
616 Sleep(sleeptime*1000);
617#else
618 sleep(sleeptime);
619#endif
620 sleeptime += 2;
621 }
622 else
623 {
624 sleeptime = 1;
625 }
626#ifndef WINDOWSVERSION
627 alarm(ALARMTIME);
628#endif
629 if(args.proxyhost)
630 {
631 int p;
632 if((i = strtol(args.port, &b, 10)) && (!b || !*b))
633 p = i;
634 else if(!(se = getservbyname(args.port, 0)))
635 {
636 fprintf(stderr, "Can't resolve port %s.", args.port);
637 stop = 1;
638 }
639 else
640 {
641 p = ntohs(se->s_port);
642 }
643 if(!stop && !error)
644 {
645 snprintf(proxyport, sizeof(proxyport), "%d", p);
646 port = args.proxyport;
647 proxyserver = args.server;
648 server = args.proxyhost;
649 }
650 }
651 else
652 {
653 server = args.server;
654 port = args.port;
655 }
656 if(!stop && !error)
657 {
658 memset(&their_addr, 0, sizeof(struct sockaddr_in));
659 if((i = strtol(port, &b, 10)) && (!b || !*b))
660 their_addr.sin_port = htons(i);
661 else if(!(se = getservbyname(port, 0)))
662 {
663 fprintf(stderr, "Can't resolve port %s.", port);
664 stop = 1;
665 }
666 else
667 {
668 their_addr.sin_port = se->s_port;
669 }
670 if(!stop && !error)
671 {
672 if(!(he=gethostbyname(server)))
673 {
674 fprintf(stderr, "Server name lookup failed for '%s'.\n", server);
675 error = 1;
676 }
677 else if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
678 {
679 perror("socket");
680 error = 1;
681 }
682 else
683 {
684 their_addr.sin_family = AF_INET;
685 their_addr.sin_addr = *((struct in_addr *)he->h_addr);
686 }
687 }
688 }
689 if(!stop && !error)
690 {
691 if(args.data && *args.data != '%' && args.mode == RTSP)
692 {
693 struct sockaddr_in local;
694 sockettype sockudp = 0;
695 int localport;
696 int cseq = 1;
697 socklen_t len;
698
699 if((sockudp = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
700 {
701 perror("socket");
702 error = 1;
703 }
704 if(!stop && !error)
705 {
706 /* fill structure with local address information for UDP */
707 memset(&local, 0, sizeof(local));
708 local.sin_family = AF_INET;
709 local.sin_port = htons(args.udpport);
710 local.sin_addr.s_addr = htonl(INADDR_ANY);
711 len = sizeof(local);
712 /* bind() in order to get a random RTP client_port */
713 if((bind(sockudp, (struct sockaddr *)&local, len)) < 0)
714 {
715 perror("bind");
716 error = 1;
717 }
718 else if((getsockname(sockudp, (struct sockaddr*)&local, &len)) == -1)
719 {
720 perror("local access failed");
721 error = 1;
722 }
723 else if(connect(sockfd, (struct sockaddr *)&their_addr,
724 sizeof(struct sockaddr)) == -1)
725 {
726 perror("connect");
727 error = 1;
728 }
729 localport = ntohs(local.sin_port);
730 }
731 if(!stop && !error)
732 {
733 i=snprintf(buf, MAXDATASIZE-40, /* leave some space for login */
734 "SETUP rtsp://%s%s%s/%s RTSP/1.0\r\n"
735 "CSeq: %d\r\n"
736 "Ntrip-Version: Ntrip/2.0\r\n"
737 "Ntrip-Component: Ntripclient\r\n"
738 "User-Agent: %s/%s\r\n"
739 "Transport: RTP/GNSS;unicast;client_port=%u\r\n"
740 "Authorization: Basic ",
741 args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
742 args.data, cseq++, AGENTSTRING, revisionstr, localport);
743 if(i > MAXDATASIZE-40 || i < 0) /* second check for old glibc */
744 {
745 fprintf(stderr, "Requested data too long\n");
746 stop = 1;
747 }
748 i += encode(buf+i, MAXDATASIZE-i-4, args.user, args.password);
749 if(i > MAXDATASIZE-4)
750 {
751 fprintf(stderr, "Username and/or password too long\n");
752 stop = 1;
753 }
754 buf[i++] = '\r';
755 buf[i++] = '\n';
756 buf[i++] = '\r';
757 buf[i++] = '\n';
758 if(args.nmea)
759 {
760 int j = snprintf(buf+i, MAXDATASIZE-i, "%s\r\n", args.nmea);
761 if(j >= 0 && j < MAXDATASIZE-i)
762 i += j;
763 else
764 {
765 fprintf(stderr, "NMEA string too long\n");
766 stop = 1;
767 }
768 }
769 }
770 if(!stop && !error)
771 {
772 if(send(sockfd, buf, (size_t)i, 0) != i)
773 {
774 perror("send");
775 error = 1;
776 }
777 else if((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) == -1)
778 {
779 perror("recv");
780 error = 1;
781 }
782 else if(numbytes >= 17 && !strncmp(buf, "RTSP/1.0 200 OK\r\n", 17))
783 {
784 int serverport = 0, session = 0;
785 const char *portcheck = "server_port=";
786 const char *sessioncheck = "session: ";
787 int l = strlen(portcheck)-1;
788 int j=0;
789 for(i = 0; j != l && i < numbytes-l; ++i)
790 {
791 for(j = 0; j < l && tolower(buf[i+j]) == portcheck[j]; ++j)
792 ;
793 }
794 if(i == numbytes-l)
795 {
796 fprintf(stderr, "No server port number found\n");
797 stop = 1;
798 }
799 else
800 {
801 i+=l;
802 while(i < numbytes && buf[i] >= '0' && buf[i] <= '9')
803 serverport = serverport * 10 + buf[i++]-'0';
804 if(buf[i] != '\r' && buf[i] != ';')
805 {
806 fprintf(stderr, "Could not extract server port\n");
807 stop = 1;
808 }
809 }
810 if(!stop && !error)
811 {
812 l = strlen(sessioncheck)-1;
813 j=0;
814 for(i = 0; j != l && i < numbytes-l; ++i)
815 {
816 for(j = 0; j < l && tolower(buf[i+j]) == sessioncheck[j]; ++j)
817 ;
818 }
819 if(i == numbytes-l)
820 {
821 fprintf(stderr, "No session number found\n");
822 stop = 1;
823 }
824 else
825 {
826 i+=l;
827 while(i < numbytes && buf[i] >= '0' && buf[i] <= '9')
828 session = session * 10 + buf[i++]-'0';
829 if(buf[i] != '\r')
830 {
831 fprintf(stderr, "Could not extract session number\n");
832 stop = 1;
833 }
834 }
835 }
836 if(!stop && !error && args.initudp)
837 {
838 printf("Sending initial UDP packet\n");
839 struct sockaddr_in casterRTP;
840 char rtpbuffer[12];
841 int i;
842 rtpbuffer[0] = (2<<6);
843 /* padding, extension, csrc are empty */
844 rtpbuffer[1] = 96;
845 /* marker is empty */
846 rtpbuffer[2] = 0;
847 rtpbuffer[3] = 0;
848 rtpbuffer[4] = 0;
849 rtpbuffer[5] = 0;
850 rtpbuffer[6] = 0;
851 rtpbuffer[7] = 0;
852 /* sequence and timestamp are empty */
853 rtpbuffer[8] = (session>>24)&0xFF;
854 rtpbuffer[9] = (session>>16)&0xFF;
855 rtpbuffer[10] = (session>>8)&0xFF;
856 rtpbuffer[11] = (session)&0xFF;
857 /* fill structure with caster address information for UDP */
858 memset(&casterRTP, 0, sizeof(casterRTP));
859 casterRTP.sin_family = AF_INET;
860 casterRTP.sin_port = htons(serverport);
861 casterRTP.sin_addr = *((struct in_addr *)he->h_addr);
862
863 if((i = sendto(sockudp, rtpbuffer, 12, 0,
864 (struct sockaddr *) &casterRTP, sizeof(casterRTP))) != 12)
865 perror("WARNING: could not send initial UDP packet");
866 }
867 if(!stop && !error)
868 {
869 i = snprintf(buf, MAXDATASIZE,
870 "PLAY rtsp://%s%s%s/%s RTSP/1.0\r\n"
871 "CSeq: %d\r\n"
872 "Session: %d\r\n"
873 "\r\n",
874 args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
875 args.data, cseq++, session);
876
877 if(i > MAXDATASIZE || i < 0) /* second check for old glibc */
878 {
879 fprintf(stderr, "Requested data too long\n");
880 stop=1;
881 }
882 else if(send(sockfd, buf, (size_t)i, 0) != i)
883 {
884 perror("send");
885 error = 1;
886 }
887 else if((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) != -1)
888 {
889 if(numbytes >= 17 && !strncmp(buf, "RTSP/1.0 200 OK\r\n", 17))
890 {
891 struct sockaddr_in addrRTP;
892 /* fill structure with caster address information for UDP */
893 memset(&addrRTP, 0, sizeof(addrRTP));
894 addrRTP.sin_family = AF_INET;
895 addrRTP.sin_port = htons(serverport);
896 their_addr.sin_addr = *((struct in_addr *)he->h_addr);
897 len = sizeof(addrRTP);
898 int ts = 0;
899 int sn = 0;
900 int ssrc = 0;
901 int init = 0;
902 int u, v, w;
903 while(!stop && !error && (i = recvfrom(sockudp, buf, 1526, 0,
904 (struct sockaddr*) &addrRTP, &len)) > 0)
905 {
906#ifndef WINDOWSVERSION
907 alarm(ALARMTIME);
908#endif
909 if(i >= 12+1 && (unsigned char)buf[0] == (2 << 6) && buf[1] == 0x60)
910 {
911 u= ((unsigned char)buf[2]<<8)+(unsigned char)buf[3];
912 v = ((unsigned char)buf[4]<<24)+((unsigned char)buf[5]<<16)
913 +((unsigned char)buf[6]<<8)+(unsigned char)buf[7];
914 w = ((unsigned char)buf[8]<<24)+((unsigned char)buf[9]<<16)
915 +((unsigned char)buf[10]<<8)+(unsigned char)buf[11];
916
917 if(init)
918 {
919 if(u < -30000 && sn > 30000) sn -= 0xFFFF;
920 if(ssrc != w || ts > v)
921 {
922 fprintf(stderr, "Illegal UDP data received.\n");
923 continue;
924 }
925 else if(u > sn) /* don't show out-of-order packets */
926 fwrite(buf+12, (size_t)i-12, 1, stdout);
927 }
928 sn = u; ts = v; ssrc = w; init = 1;
929 }
930 else
931 {
932 fprintf(stderr, "Illegal UDP header.\n");
933 continue;
934 }
935 }
936 }
937 i = snprintf(buf, MAXDATASIZE,
938 "TEARDOWN rtsp://%s%s%s/%s RTSP/1.0\r\n"
939 "CSeq: %d\r\n"
940 "Session: %d\r\n"
941 "\r\n",
942 args.server, proxyserver ? ":" : "", proxyserver ? args.port : "",
943 args.data, cseq++, session);
944
945 if(i > MAXDATASIZE || i < 0) /* second check for old glibc */
946 {
947 fprintf(stderr, "Requested data too long\n");
948 stop = 1;
949 }
950 else if(send(sockfd, buf, (size_t)i, 0) != i)
951 {
952 perror("send");
953 error = 1;
954 }
955 }
956 else
957 {
958 fprintf(stderr, "Could not start data stream.\n");
959 error = 1;
960 }
961 }
962 }
963 else
964 {
965 fprintf(stderr, "Could not setup initial control connection.\n");
966 error = 1;
967 }
968 if(sockudp)
969 closesocket(sockudp);
970 }
971 }
972 else
973 {
974 if(connect(sockfd, (struct sockaddr *)&their_addr,
975 sizeof(struct sockaddr)) == -1)
976 {
977 perror("connect");
978 error = 1;
979 }
980 if(!stop && !error)
981 {
982 if(!args.data)
983 {
984 i = snprintf(buf, MAXDATASIZE,
985 "GET %s%s%s%s/ HTTP/1.0\r\n"
986 "Host: %s\r\n%s"
987 "User-Agent: %s/%s\r\n"
988 "Connection: close\r\n"
989 "\r\n"
990 , proxyserver ? "http://" : "", proxyserver ? proxyserver : "",
991 proxyserver ? ":" : "", proxyserver ? proxyport : "",
992 args.server, args.mode == NTRIP1 ? "" : "Ntrip-Version: Ntrip/2.0\r\n",
993 AGENTSTRING, revisionstr);
994 }
995 else
996 {
997 i=snprintf(buf, MAXDATASIZE-40, /* leave some space for login */
998 "GET %s%s%s%s/%s HTTP/1.0\r\n"
999 "Host: %s\r\n%s"
1000 "User-Agent: %s/%s\r\n"
1001 "Connection: close\r\n"
1002 "Authorization: Basic "
1003 , proxyserver ? "http://" : "", proxyserver ? proxyserver : "",
1004 proxyserver ? ":" : "", proxyserver ? proxyport : "",
1005 args.data, args.server,
1006 args.mode == NTRIP1 ? "" : "Ntrip-Version: Ntrip/2.0\r\n",
1007 AGENTSTRING, revisionstr);
1008 if(i > MAXDATASIZE-40 || i < 0) /* second check for old glibc */
1009 {
1010 fprintf(stderr, "Requested data too long\n");
1011 stop = 1;
1012 }
1013 else
1014 {
1015 i += encode(buf+i, MAXDATASIZE-i-4, args.user, args.password);
1016 if(i > MAXDATASIZE-4)
1017 {
1018 fprintf(stderr, "Username and/or password too long\n");
1019 stop = 1;
1020 }
1021 else
1022 {
1023 buf[i++] = '\r';
1024 buf[i++] = '\n';
1025 buf[i++] = '\r';
1026 buf[i++] = '\n';
1027 if(args.nmea)
1028 {
1029 int j = snprintf(buf+i, MAXDATASIZE-i, "%s\r\n", args.nmea);
1030 if(j >= 0 && j < MAXDATASIZE-i)
1031 i += j;
1032 else
1033 {
1034 fprintf(stderr, "NMEA string too long\n");
1035 stop = 1;
1036 }
1037 }
1038 }
1039 }
1040 }
1041 }
1042 if(!stop && !error)
1043 {
1044 if(send(sockfd, buf, (size_t)i, 0) != i)
1045 {
1046 perror("send");
1047 error = 1;
1048 }
1049 else if(args.data && *args.data != '%')
1050 {
1051 int k = 0;
1052 int chunkymode = 0;
1053 int starttime = time(0);
1054 int lastout = starttime;
1055 int totalbytes = 0;
1056 int chunksize = 0;
1057
1058 while(!stop && !error &&
1059 (numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) > 0)
1060 {
1061#ifndef WINDOWSVERSION
1062 alarm(ALARMTIME);
1063#endif
1064 if(!k)
1065 {
1066 if( numbytes > 17 &&
1067 !strstr(buf, "ICY 200 OK") && /* case 'proxy & ntrip 1.0 caster' */
1068 (!strncmp(buf, "HTTP/1.1 200 OK\r\n", 17) ||
1069 !strncmp(buf, "HTTP/1.0 200 OK\r\n", 17)) )
1070 {
1071 const char *datacheck = "Content-Type: gnss/data\r\n";
1072 const char *chunkycheck = "Transfer-Encoding: chunked\r\n";
1073 int l = strlen(datacheck)-1;
1074 int j=0;
1075 for(i = 0; j != l && i < numbytes-l; ++i)
1076 {
1077 for(j = 0; j < l && buf[i+j] == datacheck[j]; ++j)
1078 ;
1079 }
1080 if(i == numbytes-l)
1081 {
1082 fprintf(stderr, "No 'Content-Type: gnss/data' found\n");
1083 error = 1;
1084 }
1085 l = strlen(chunkycheck)-1;
1086 j=0;
1087 for(i = 0; j != l && i < numbytes-l; ++i)
1088 {
1089 for(j = 0; j < l && buf[i+j] == chunkycheck[j]; ++j)
1090 ;
1091 }
1092 if(i < numbytes-l)
1093 chunkymode = 1;
1094 }
1095 else if(!strstr(buf, "ICY 200 OK"))
1096 {
1097 fprintf(stderr, "Could not get the requested data: ");
1098 for(k = 0; k < numbytes && buf[k] != '\n' && buf[k] != '\r'; ++k)
1099 {
1100 fprintf(stderr, "%c", isprint(buf[k]) ? buf[k] : '.');
1101 }
1102 fprintf(stderr, "\n");
1103 error = 1;
1104 }
1105 else if(args.mode != NTRIP1)
1106 {
1107 fprintf(stderr, "NTRIP version 2 HTTP connection failed%s.\n",
1108 args.mode == AUTO ? ", falling back to NTRIP1" : "");
1109 if(args.mode == HTTP)
1110 stop = 1;
1111 }
1112 ++k;
1113 }
1114 else
1115 {
1116 sleeptime = 0;
1117 if(chunkymode)
1118 {
1119 int cstop = 0;
1120 int pos = 0;
1121 while(!stop && !cstop && !error && pos < numbytes)
1122 {
1123 switch(chunkymode)
1124 {
1125 case 1: /* reading number starts */
1126 chunksize = 0;
1127 ++chunkymode; /* no break */
1128 case 2: /* during reading number */
1129 i = buf[pos++];
1130 if(i >= '0' && i <= '9') chunksize = chunksize*16+i-'0';
1131 else if(i >= 'a' && i <= 'f') chunksize = chunksize*16+i-'a'+10;
1132 else if(i >= 'A' && i <= 'F') chunksize = chunksize*16+i-'A'+10;
1133 else if(i == '\r') ++chunkymode;
1134 else if(i == ';') chunkymode = 5;
1135 else cstop = 1;
1136 break;
1137 case 3: /* scanning for return */
1138 if(buf[pos++] == '\n') chunkymode = chunksize ? 4 : 1;
1139 else cstop = 1;
1140 break;
1141 case 4: /* output data */
1142 i = numbytes-pos;
1143 if(i > chunksize) i = chunksize;
1144 if(args.serdevice)
1145 {
1146 int ofs = 0;
1147 while(i > ofs && !cstop && !stop && !error)
1148 {
1149 int j = SerialWrite(&sx, buf+pos+ofs, i-ofs);
1150 if(j < 0)
1151 {
1152 fprintf(stderr, "Could not access serial device\n");
1153 stop = 1;
1154 }
1155 else
1156 ofs += j;
1157 }
1158 }
1159 else
1160 fwrite(buf+pos, (size_t)i, 1, stdout);
1161 totalbytes += i;
1162 chunksize -= i;
1163 pos += i;
1164 if(!chunksize)
1165 chunkymode = 1;
1166 break;
1167 case 5:
1168 if(i == '\r') chunkymode = 3;
1169 break;
1170 }
1171 }
1172 if(cstop)
1173 {
1174 fprintf(stderr, "Error in chunky transfer encoding\n");
1175 error = 1;
1176 }
1177 }
1178 else
1179 {
1180 totalbytes += numbytes;
1181 if(args.serdevice)
1182 {
1183 int ofs = 0;
1184 while(numbytes > ofs && !stop)
1185 {
1186 int i = SerialWrite(&sx, buf+ofs, numbytes-ofs);
1187 if(i < 0)
1188 {
1189 fprintf(stderr, "Could not access serial device\n");
1190 stop = 1;
1191 }
1192 else
1193 ofs += i;
1194 }
1195 }
1196 else
1197 fwrite(buf, (size_t)numbytes, 1, stdout);
1198 }
1199 fflush(stdout);
1200 if(totalbytes < 0) /* overflow */
1201 {
1202 totalbytes = 0;
1203 starttime = time(0);
1204 lastout = starttime;
1205 }
1206 if(args.serdevice && !stop)
1207 {
1208 int doloop = 1;
1209 while(doloop && !stop)
1210 {
1211 int i = SerialRead(&sx, buf, 200);
1212 if(i < 0)
1213 {
1214 fprintf(stderr, "Could not access serial device\n");
1215 stop = 1;
1216 }
1217 else
1218 {
1219 int j = 0;
1220 if(i < 200) doloop = 0;
1221 fwrite(buf, i, 1, stdout);
1222 if(ser)
1223 fwrite(buf, i, 1, ser);
1224 while(j < i)
1225 {
1226 if(nmeabufpos < 6)
1227 {
1228 if(nmeabuffer[nmeabufpos] != buf[j])
1229 {
1230 if(nmeabufpos) nmeabufpos = 0;
1231 else ++j;
1232 }
1233 else
1234 {
1235 nmeastarpos = 0;
1236 ++j; ++nmeabufpos;
1237 }
1238 }
1239 else if((nmeastarpos && nmeabufpos == nmeastarpos + 3)
1240 || buf[j] == '\r' || buf[j] == '\n')
1241 {
1242 doloop = 0;
1243 nmeabuffer[nmeabufpos++] = '\r';
1244 nmeabuffer[nmeabufpos++] = '\n';
1245 if(send(sockfd, nmeabuffer, nmeabufpos, 0)
1246 != (int)nmeabufpos)
1247 {
1248 fprintf(stderr, "Could not send NMEA\n");
1249 error = 1;
1250 }
1251 nmeabufpos = 0;
1252 }
1253 else if(nmeabufpos > sizeof(nmeabuffer)-10 ||
1254 buf[j] == '$')
1255 nmeabufpos = 0;
1256 else
1257 {
1258 if(buf[j] == '*') nmeastarpos = nmeabufpos;
1259 nmeabuffer[nmeabufpos++] = buf[j++];
1260 }
1261 }
1262 }
1263 }
1264 }
1265 if(args.bitrate)
1266 {
1267 int t = time(0);
1268 if(t > lastout + 60)
1269 {
1270 lastout = t;
1271 fprintf(stderr, "Bitrate is %dbyte/s (%d seconds accumulated).\n",
1272 totalbytes/(t-starttime), t-starttime);
1273 }
1274 }
1275 }
1276 }
1277 }
1278 else
1279 {
1280 sleeptime = 0;
1281 while(!stop && (numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) > 0)
1282 {
1283 #ifndef WINDOWSVERSION
1284 alarm(ALARMTIME);
1285 #endif
1286 fwrite(buf, (size_t)numbytes, 1, stdout);
1287 }
1288 }
1289 }
1290 }
1291 }
1292 if(sockfd)
1293 closesocket(sockfd);
1294 } while(args.data && *args.data != '%' && !stop);
1295 if(args.serdevice)
1296 {
1297 SerialFree(&sx);
1298 }
1299 if(ser)
1300 fclose(ser);
1301 }
1302 return 0;
1303}
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