source: ntrip/trunk/ntripserver/ntripserver.c@ 9483

Last change on this file since 9483 was 9468, checked in by stuerze, 14 months ago

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File size: 77.5 KB
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1/*
2 * $Id: ntripserver.c 9468 2021-06-10 09:54:28Z stuerze $
3 *
4 * Copyright (c) 2003...2019
5 * German Federal Agency for Cartography and Geodesy (BKG)
6 * Dirk Stöcker (Alberding GmbH)
7 *
8 * Developed for Networked Transport of RTCM via Internet Protocol (NTRIP)
9 * for streaming GNSS data over the Internet.
10 *
11 * Designed by Informatik Centrum Dortmund http://www.icd.de
12 *
13 * The BKG disclaims any liability nor responsibility to any person or
14 * entity with respect to any loss or damage caused, or alleged to be
15 * caused, directly or indirectly by the use and application of the NTRIP
16 * technology.
17 *
18 * For latest information and updates, access:
19 * https://igs.bkg.bund.de/ntrip/index
20 *
21 * BKG, Frankfurt, Germany, August 2019
22 * E-mail: euref-ip@bkg.bund.de
23 *
24 * This program is free software; you can redistribute it and/or
25 * modify it under the terms of the GNU General Public License
26 * as published by the Free Software Foundation; either version 2
27 * of the License, or (at your option) any later version.
28 *
29 * This program is distributed in the hope that it will be useful,
30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
32 * GNU General Public License for more details.
33 *
34 * You should have received a copy of the GNU General Public License along
35 * with this program; if not, write to the Free Software Foundation, Inc.,
36 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
37 */
38
39/* SVN revision and version */
40static char revisionstr[] = "$Revision: 9468 $";
41static char datestr[] = "$Date: 2021-06-10 09:54:28 +0000 (Thu, 10 Jun 2021) $";
42
43#include <ctype.h>
44#include <errno.h>
45#include <fcntl.h>
46#include <getopt.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50#include <sys/time.h>
51#include <sys/types.h>
52#include <time.h>
53#include <signal.h>
54#include <unistd.h>
55
56#ifdef WINDOWSVERSION
57 #include <winsock2.h>
58 #include <io.h>
59 #include <sys/stat.h>
60 #include <windows.h>
61 typedef SOCKET sockettype;
62 typedef u_long in_addr_t;
63 typedef size_t socklen_t;
64 typedef u_short uint16_t;
65#else
66typedef int sockettype;
67#include <arpa/inet.h>
68#include <sys/socket.h>
69#include <netinet/in.h>
70#include <netdb.h>
71#include <sys/termios.h>
72#define closesocket(sock) close(sock)
73#define INVALID_HANDLE_VALUE -1
74#define INVALID_SOCKET -1
75#endif
76
77#ifndef COMPILEDATE
78#define COMPILEDATE " built " __DATE__
79#endif
80
81#define ALARMTIME (2*60)
82
83#ifndef MSG_DONTWAIT
84#define MSG_DONTWAIT 0 /* prevent compiler errors */
85#endif
86#ifndef O_EXLOCK
87#define O_EXLOCK 0 /* prevent compiler errors */
88#endif
89
90enum MODE {
91 SERIAL = 1,
92 TCPSOCKET = 2,
93 INFILE = 3,
94 SISNET = 4,
95 UDPSOCKET = 5,
96 NTRIP1_IN = 6,
97 NTRIP2_HTTP_IN = 7, // HTTP only
98 LAST
99};
100
101enum OUTMODE {
102 HTTP = 1,
103 RTSP = 2,
104 NTRIP1 = 3,
105 UDP = 4,
106 TCPIP = 5,
107 END
108};
109
110#define AGENTSTRING "NTRIP NtripServerPOSIX"
111#define BUFSZ 10240
112#define SZ 64
113
114/* default socket source */
115#define SERV_HOST_ADDR "localhost"
116#define SERV_TCP_PORT 2101
117
118/* default destination */
119#define NTRIP_CASTER "euref-ip.net"
120#define NTRIP_PORT 2101
121
122#define SISNET_SERVER "131.176.49.142"
123#define SISNET_PORT 7777
124
125#define RTP_VERSION 2
126#define TIME_RESOLUTION 125
127
128static int ttybaud = 19200;
129#ifndef WINDOWSVERSION
130static const char *ttyport = "/dev/gps";
131#else
132 static const char *ttyport = "COM1";
133#endif
134static const char *filepath = "/dev/stdin";
135static enum MODE inputmode = INFILE;
136static int sisnet = 31;
137static int gps_file = -1;
138static sockettype gps_socket = INVALID_SOCKET;
139static sockettype socket_tcp = INVALID_SOCKET;
140static sockettype local_socket_tcp = INVALID_SOCKET;
141static sockettype socket_udp = INVALID_SOCKET;
142#ifndef WINDOWSVERSION
143static int gps_serial = INVALID_HANDLE_VALUE;
144static int sigpipe_received = 0;
145#else
146 HANDLE gps_serial = INVALID_HANDLE_VALUE;
147#endif
148static int sigalarm_received = 0;
149static int sigint_received = 0;
150static int reconnect_sec = 1;
151static const char *casterouthost = NTRIP_CASTER;
152static char rtsp_extension[SZ] = "";
153static const char *mountpoint = NULL;
154static int udp_cseq = 1;
155static int udp_tim, udp_seq, udp_init;
156
157/* Forward references */
158static void send_receive_loop(sockettype sock, int outmode,
159 struct sockaddr *pcasterRTP, socklen_t length, unsigned int rtpssrc,
160 int chnunkymode);
161static void usage(int, char*);
162static int encode(char *buf, int size, const char *user, const char *pwd);
163static int send_to_caster(char *input, sockettype socket, int input_size);
164static void close_session(const char *caster_addr, const char *mountpoint,
165 int session, char *rtsp_ext, int fallback);
166static int reconnect(int rec_sec, int rec_sec_max);
167static void handle_sigint(int sig);
168static void setup_signal_handler(int sig, void (*handler)(int));
169#ifndef WINDOWSVERSION
170static int openserial(const char *tty, int blocksz, int baud);
171static void handle_sigpipe(int sig);
172static void handle_alarm(int sig);
173#else
174 static HANDLE openserial(const char * tty, int baud);
175#endif
176
177/*
178 * main
179 *
180 * Main entry point for the program. Processes command-line arguments and
181 * prepares for action.
182 *
183 * Parameters:
184 * argc : integer : Number of command-line arguments.
185 * argv : array of char : Command-line arguments as an array of
186 * zero-terminated pointers to strings.
187 *
188 * Return Value:
189 * The function does not return a value (although its return type is int).
190 *
191 * Remarks:
192 *
193 */
194int main(int argc, char **argv) {
195 int c;
196 int size = 2048; /* for setting send buffer size */
197 struct sockaddr_in caster;
198 const char *proxyhost = "";
199 unsigned int proxyport = 0;
200
201 /*** INPUT ***/
202 const char *casterinhost = 0;
203 unsigned int casterinport = 0;
204 const char *inhost = 0;
205 unsigned int inport = 0;
206 int chunkymode = 0;
207 char get_extension[SZ] = "";
208
209 struct hostent *he;
210
211 const char *sisnetpassword = "";
212 const char *sisnetuser = "";
213
214 const char *stream_name = 0;
215 const char *stream_user = 0;
216 const char *stream_password = 0;
217
218 const char *recvrid = 0;
219 const char *recvrpwd = 0;
220
221 const char *initfile = NULL;
222
223 int bindmode = 0;
224
225 /*** OUTPUT ***/
226 unsigned int casteroutport = NTRIP_PORT;
227 const char *outhost = 0;
228 unsigned int outport = 0;
229 char post_extension[SZ] = "";
230
231 const char *ntrip_str = "";
232
233 const char *user = "";
234 const char *password = "";
235
236 int outputmode = NTRIP1;
237
238 struct sockaddr_in casterRTP;
239 struct sockaddr_in local;
240 int client_port = 0;
241 int server_port = 0;
242 unsigned int session = 0;
243 socklen_t len = 0;
244 int i = 0;
245
246 char szSendBuffer[BUFSZ];
247 char authorization[SZ];
248 int nBufferBytes = 0;
249 char *dlim = " \r\n=";
250 char *token;
251 char *tok_buf[BUFSZ];
252
253 int reconnect_sec_max = 0;
254
255 setbuf(stdout, 0);
256 setbuf(stdin, 0);
257 setbuf(stderr, 0);
258
259 {
260 char *a;
261 int i = 2;
262 strcpy(revisionstr, "1.");
263 for (a = revisionstr + 11; *a && *a != ' '; ++a)
264 revisionstr[i++] = *a;
265 revisionstr[i] = 0;
266 i = 0;
267 for (a = datestr + 7; *a && *a != ' '; ++a)
268 datestr[i++] = *a;
269 datestr[i] = 0;
270 }
271
272 /* setup signal handler for CTRL+C */
273 setup_signal_handler(SIGINT, handle_sigint);
274#ifndef WINDOWSVERSION
275 /* setup signal handler for boken pipe */
276 setup_signal_handler(SIGPIPE, handle_sigpipe);
277 /* setup signal handler for timeout */
278 setup_signal_handler(SIGALRM, handle_alarm);
279 alarm(ALARMTIME);
280#else
281 /* winsock initialization */
282 WSADATA wsaData;
283 if (WSAStartup(MAKEWORD(1,1), &wsaData))
284 {
285 fprintf(stderr, "Could not init network access.\n");
286 return 20;
287 }
288#endif
289
290 /* get and check program arguments */
291 if (argc <= 1) {
292 usage(2, argv[0]);
293 exit(1);
294 }
295 while ((c = getopt(argc, argv,
296 "M:i:h:b:p:s:a:m:c:H:P:f:x:y:l:u:V:D:U:W:O:E:F:R:N:n:B")) != EOF) {
297 switch (c) {
298 case 'M': /*** InputMode ***/
299 if (!strcmp(optarg, "serial"))
300 inputmode = SERIAL;
301 else if (!strcmp(optarg, "tcpsocket"))
302 inputmode = TCPSOCKET;
303 else if (!strcmp(optarg, "file"))
304 inputmode = INFILE;
305 else if (!strcmp(optarg, "sisnet"))
306 inputmode = SISNET;
307 else if (!strcmp(optarg, "udpsocket"))
308 inputmode = UDPSOCKET;
309 else if (!strcmp(optarg, "ntrip1"))
310 inputmode = NTRIP1_IN;
311 else if (!strcmp(optarg, "ntrip2http"))
312 inputmode = NTRIP2_HTTP_IN;
313 else
314 inputmode = atoi(optarg);
315 if ((inputmode == 0) || (inputmode >= LAST)) {
316 fprintf(stderr, "ERROR: can't convert <%s> to a valid InputMode\n",
317 optarg);
318 usage(-1, argv[0]);
319 }
320 break;
321 case 'i': /* serial input device */
322 ttyport = optarg;
323 break;
324 case 'B': /* bind to incoming UDP stream */
325 bindmode = 1;
326 break;
327 case 'V': /* Sisnet data server version number */
328 if (!strcmp("3.0", optarg))
329 sisnet = 30;
330 else if (!strcmp("3.1", optarg))
331 sisnet = 31;
332 else if (!strcmp("2.1", optarg))
333 sisnet = 21;
334 else {
335 fprintf(stderr, "ERROR: unknown SISNeT version <%s>\n", optarg);
336 usage(-2, argv[0]);
337 }
338 break;
339 case 'b': /* serial input baud rate */
340 ttybaud = atoi(optarg);
341 if (ttybaud <= 1) {
342 fprintf(stderr,
343 "ERROR: can't convert <%s> to valid serial baud rate\n", optarg);
344 usage(1, argv[0]);
345 }
346 break;
347 case 'a': /* Destination caster address */
348 casterouthost = optarg;
349 break;
350 case 'p': /* Destination caster port */
351 casteroutport = atoi(optarg);
352 if (casteroutport <= 1 || casteroutport > 65535) {
353 fprintf(stderr,
354 "ERROR: can't convert <%s> to a valid HTTP server port\n",
355 optarg);
356 usage(1, argv[0]);
357 }
358 break;
359 case 'm': /* Destination caster mountpoint for stream upload */
360 mountpoint = optarg;
361 break;
362 case 's': /* File name for input data simulation from file */
363 filepath = optarg;
364 break;
365 case 'f': /* name of an initialization file */
366 initfile = optarg;
367 break;
368 case 'x': /* user ID to access incoming stream */
369 recvrid = optarg;
370 break;
371 case 'y': /* password to access incoming stream */
372 recvrpwd = optarg;
373 break;
374 case 'u': /* Sisnet data server user ID */
375 sisnetuser = optarg;
376 break;
377 case 'l': /* Sisnet data server password */
378 sisnetpassword = optarg;
379 break;
380 case 'c': /* DestinationCaster password for stream upload to mountpoint */
381 password = optarg;
382 break;
383 case 'H': /* Input host address*/
384 casterinhost = optarg;
385 break;
386 case 'P': /* Input port */
387 casterinport = atoi(optarg);
388 if (casterinport <= 1 || casterinport > 65535) {
389 fprintf(stderr, "ERROR: can't convert <%s> to a valid port number\n",
390 optarg);
391 usage(1, argv[0]);
392 }
393 break;
394 case 'D': /* Source caster mountpoint for stream input */
395 stream_name = optarg;
396 break;
397 case 'U': /* Source caster user ID for input stream access */
398 stream_user = optarg;
399 break;
400 case 'W': /* Source caster password for input stream access */
401 stream_password = optarg;
402 break;
403 case 'E': /* Proxy Server */
404 proxyhost = optarg;
405 break;
406 case 'F': /* Proxy port */
407 proxyport = atoi(optarg);
408 break;
409 case 'R': /* maximum delay between reconnect attempts in seconds */
410 reconnect_sec_max = atoi(optarg);
411 break;
412 case 'O': /* OutputMode */
413 outputmode = 0;
414 if (!strcmp(optarg, "n") || !strcmp(optarg, "ntrip1"))
415 outputmode = NTRIP1;
416 else if (!strcmp(optarg, "h") || !strcmp(optarg, "http"))
417 outputmode = HTTP;
418 else if (!strcmp(optarg, "r") || !strcmp(optarg, "rtsp"))
419 outputmode = RTSP;
420 else if (!strcmp(optarg, "u") || !strcmp(optarg, "udp"))
421 outputmode = UDP;
422 else if (!strcmp(optarg, "t") || !strcmp(optarg, "tcpip"))
423 outputmode = TCPIP;
424 else
425 outputmode = atoi(optarg);
426 if ((outputmode == 0) || (outputmode >= END)) {
427 fprintf(stderr, "ERROR: can't convert <%s> to a valid OutputMode\n",
428 optarg);
429 usage(-1, argv[0]);
430 }
431 break;
432 case 'n': /* Destination caster user ID for stream upload to mountpoint */
433 user = optarg;
434 break;
435 case 'N': /* Ntrip-STR, optional for Ntrip Version 2.0 */
436 ntrip_str = optarg;
437 break;
438 case 'h': /* print help screen */
439 case '?':
440 usage(0, argv[0]);
441 break;
442 default:
443 usage(2, argv[0]);
444 break;
445 }
446 }
447
448 argc -= optind;
449 argv += optind;
450
451 /*** argument analysis ***/
452 if (argc > 0) {
453 fprintf(stderr, "ERROR: Extra args on command line: ");
454 for (; argc > 0; argc--) {
455 fprintf(stderr, " %s", *argv++);
456 }
457 fprintf(stderr, "\n");
458 usage(1, argv[0]); /* never returns */
459 }
460
461 if ((reconnect_sec_max > 0) && (reconnect_sec_max < 256)) {
462 fprintf(stderr,
463 "WARNING: maximum delay between reconnect attempts changed from %d to 256 seconds\n",
464 reconnect_sec_max);
465 reconnect_sec_max = 256;
466 }
467
468 if (!mountpoint && outputmode != TCPIP) {
469 fprintf(stderr, "ERROR: Missing mountpoint argument for stream upload\n");
470 exit(1);
471 }
472 if (outputmode == TCPIP) {
473 mountpoint = NULL;
474 }
475
476 if (!password[0]) {
477 if (outputmode != TCPIP)
478 fprintf(stderr,
479 "WARNING: Missing password argument for stream upload - are you really sure?\n");
480 } else {
481 nBufferBytes += encode(authorization, sizeof(authorization), user,
482 password);
483 if (nBufferBytes > (int) sizeof(authorization)) {
484 fprintf(stderr, "ERROR: user ID and/or password too long: %d (%d)\n"
485 " user ID: %s \npassword: <%s>\n", nBufferBytes,
486 (int) sizeof(authorization), user, password);
487 exit(1);
488 }
489 }
490
491 if (stream_name && stream_user && !stream_password) {
492 fprintf(stderr, "WARNING: Missing password argument for stream download - are you really sure?\n");
493 }
494
495 /*** proxy server handling ***/
496 if (*proxyhost) {
497 inhost = proxyhost;
498 inport = proxyport;
499 i = snprintf(szSendBuffer, sizeof(szSendBuffer), "http://%s:%d", casterinhost, casterinport);
500 if ((i > SZ) || (i < 0)) {
501 fprintf(stderr,
502 "ERROR: Destination caster name/port to long - length = %d (max: %d)\n",
503 i, SZ);
504 exit(0);
505 } else {
506 strncpy(get_extension, szSendBuffer, (size_t) i);
507 strcpy(szSendBuffer, "");
508 i = 0;
509 }
510 if (strstr(casterouthost, "127.0.0.1") ||
511 strstr(casterouthost, "localhost")) {
512 outhost = casterouthost;
513 outport = casteroutport;
514 }
515 else {
516 outhost = proxyhost;
517 outport = proxyport;
518 i = snprintf(szSendBuffer, sizeof(szSendBuffer), "http://%s:%d", casterouthost, casteroutport);
519 if ((i > SZ) || (i < 0)) {
520 fprintf(stderr,
521 "ERROR: Destination caster name/port to long - length = %d (max: %d)\n",
522 i, SZ);
523 exit(0);
524 } else {
525 strncpy(post_extension, szSendBuffer, (size_t) i);
526 strcpy(szSendBuffer, "");
527 i = snprintf(szSendBuffer, sizeof(szSendBuffer), ":%d", casteroutport);
528 strncpy(rtsp_extension, szSendBuffer, SZ);
529 strcpy(szSendBuffer, ""); i = 0;
530 }
531 }
532
533 } else {
534 outhost = casterouthost;
535 outport = casteroutport;
536 inhost = casterinhost;
537 inport = casterinport;
538 }
539
540 while (inputmode != LAST) {
541 int input_init = 1;
542 if (sigint_received)
543 break;
544 /*** InputMode handling ***/
545 switch (inputmode) {
546 case INFILE: {
547 if ((gps_file = open(filepath, O_RDONLY)) < 0) {
548 perror("ERROR: opening input file");
549 exit(1);
550 }
551#ifndef WINDOWSVERSION
552 /* set blocking inputmode in case it was not set
553 (seems to be sometimes for fifo's) */
554 fcntl(gps_file, F_SETFL, 0);
555#endif
556 printf("file input: file = %s\n", filepath);
557 }
558 break;
559 case SERIAL: /* open serial port */ {
560#ifndef WINDOWSVERSION
561 gps_serial = openserial(ttyport, 1, ttybaud);
562#else
563 gps_serial = openserial(ttyport, ttybaud);
564#endif
565 if (gps_serial == INVALID_HANDLE_VALUE)
566 exit(1);
567 printf("serial input: device = %s, speed = %d\n", ttyport, ttybaud);
568
569 if (initfile) {
570 char buffer[1024];
571 FILE *fh;
572 int i;
573
574 if ((fh = fopen(initfile, "r"))) {
575 while ((i = fread(buffer, 1, sizeof(buffer), fh)) > 0) {
576#ifndef WINDOWSVERSION
577 if ((write(gps_serial, buffer, i)) != i) {
578 perror("WARNING: sending init file");
579 input_init = 0;
580 break;
581 }
582#else
583 DWORD nWrite = -1;
584 if(!WriteFile(gps_serial, buffer, sizeof(buffer), &nWrite, NULL)) {
585 fprintf(stderr,"ERROR: sending init file \n");
586 input_init = 0;
587 break;
588 }
589 i = (int)nWrite;
590#endif
591 }
592 if (i < 0) {
593 perror("ERROR: reading init file");
594 reconnect_sec_max = 0;
595 input_init = 0;
596 break;
597 }
598 fclose(fh);
599 } else {
600 fprintf(stderr, "ERROR: can't read init file <%s>\n", initfile);
601 reconnect_sec_max = 0;
602 input_init = 0;
603 break;
604 }
605 }
606 }
607 break;
608 case TCPSOCKET:
609 case UDPSOCKET:
610 case SISNET:
611 case NTRIP1_IN:
612 case NTRIP2_HTTP_IN: {
613 if (inputmode == SISNET) {
614 if (!inhost)
615 inhost = SISNET_SERVER;
616 if (!inport)
617 inport = SISNET_PORT;
618 } else if (inputmode == NTRIP1_IN || inputmode == NTRIP2_HTTP_IN) {
619 if (!inport)
620 inport = NTRIP_PORT;
621 if (!inhost)
622 inhost = NTRIP_CASTER;
623 } else if ((inputmode == TCPSOCKET) || (inputmode == UDPSOCKET)) {
624 if (!inport)
625 inport = SERV_TCP_PORT;
626 if (!inhost)
627 inhost = SERV_HOST_ADDR;
628 }
629
630 if (!(he = gethostbyname(inhost))) {
631 fprintf(stderr, "ERROR: Input host <%s> unknown\n", inhost);
632 usage(-2, argv[0]);
633 }
634
635 if ((gps_socket = socket(AF_INET, inputmode == UDPSOCKET ? SOCK_DGRAM : SOCK_STREAM, 0)) == INVALID_SOCKET) {
636 fprintf(stderr,
637 "ERROR: can't create socket for incoming data stream\n");
638 exit(1);
639 }
640
641 memset((char*) &caster, 0x00, sizeof(caster));
642 if (!bindmode)
643 memcpy(&caster.sin_addr, he->h_addr, (size_t)he->h_length);
644 caster.sin_family = AF_INET;
645 caster.sin_port = htons(inport);
646
647 fprintf(stderr, "%s input: host = %s, port = %d, %s%s%s%s%s\n",
648 inputmode == NTRIP1_IN ? "ntrip1" :
649 inputmode == NTRIP2_HTTP_IN ? "ntrip2" :
650 inputmode == SISNET ? "sisnet" :
651 inputmode == TCPSOCKET ? "tcp socket" : "udp socket",
652 bindmode ? "127.0.0.1" : inet_ntoa(caster.sin_addr), inport,
653 stream_name ? "stream = " : "", stream_name ? stream_name : "",
654 initfile ? ", initfile = " : "", initfile ? initfile : "",
655 bindmode ? "binding mode" : "");
656
657 if (bindmode) {
658 if (bind(gps_socket, (struct sockaddr*) &caster, sizeof(caster))
659 < 0) {
660 fprintf(stderr, "ERROR: can't bind input to port %d\n", inport);
661 reconnect_sec_max = 0;
662 input_init = 0;
663 break;
664 }
665 } /* connect to input-caster or proxy server*/
666 else if (connect(gps_socket, (struct sockaddr*) &caster, sizeof(caster)) < 0) {
667 fprintf(stderr, "WARNING: can't connect input to %s at port %d\n",
668 inet_ntoa(caster.sin_addr), inport);
669 input_init = 0;
670 break;
671 }
672
673 /* input from NTRIP caster */
674 int init = 0;
675 /* set socket buffer size */
676 setsockopt(gps_socket, SOL_SOCKET, SO_SNDBUF, (const char*) &size, sizeof(const char*));
677 /* input from Ntrip caster*/
678 nBufferBytes=snprintf(szSendBuffer, sizeof(szSendBuffer) - 40,/* leave some space for login */
679 "GET %s/%s HTTP/1.1\r\n"
680 "Host: %s\r\n"
681 "%s"
682 "User-Agent: %s/%s\r\n"
683 //"%s%s%s" // nmea
684 "Connection: close%s",
685 get_extension,
686 stream_name ? stream_name : "",
687 casterinhost,
688 inputmode == NTRIP1_IN ? "" : "Ntrip-Version: Ntrip/2.0\r\n",
689 AGENTSTRING, revisionstr,
690 //args.nmea ? "Ntrip-GGA: " : "", args.nmea ? args.nmea : "", args.nmea ? "\r\n" : "", // TODO: add argument
691 (*stream_user || *stream_password) ? "\r\nAuthorization: Basic " : "");
692 /* second check for old glibc */
693 if (nBufferBytes > (int) sizeof(szSendBuffer) - 40 || nBufferBytes < 0) {
694 fprintf(stderr, "ERROR: Source caster request too long\n");
695 input_init = 0;
696 reconnect_sec_max = 0;
697 break;
698 }
699 nBufferBytes += encode(szSendBuffer + nBufferBytes, sizeof(szSendBuffer) - nBufferBytes - 4,
700 stream_user, stream_password);
701 if (nBufferBytes > (int) sizeof(szSendBuffer) - 4) {
702 fprintf(stderr, "ERROR: Source caster user ID and/or password too long\n");
703 input_init = 0;
704 reconnect_sec_max = 0;
705 break;
706 }
707 szSendBuffer[nBufferBytes++] = '\r';
708 szSendBuffer[nBufferBytes++] = '\n';
709 szSendBuffer[nBufferBytes++] = '\r';
710 szSendBuffer[nBufferBytes++] = '\n';
711#ifndef NDEBUG
712 fprintf(stdout, "%s\n", szSendBuffer);
713#endif
714 if ((send(gps_socket, szSendBuffer, (size_t) nBufferBytes, 0)) != nBufferBytes) {
715 fprintf(stderr, "WARNING: could not send Source caster request\n");
716 input_init = 0;
717 break;
718 }
719 nBufferBytes = 0;
720 /* check Source caster's response */
721 while (!init && nBufferBytes < (int) sizeof(szSendBuffer) &&
722 (nBufferBytes += recv(gps_socket, szSendBuffer, sizeof(szSendBuffer) - nBufferBytes, 0)) > 0) {
723 if( nBufferBytes > 17 && !strstr(szSendBuffer, "ICY 200 OK") && /* case 'proxy & ntrip 1.0 caster' */
724 (!strncmp(szSendBuffer, "HTTP/1.1 200 OK\r\n", 17) ||
725 !strncmp(szSendBuffer, "HTTP/1.0 200 OK\r\n", 17)) ) {
726 const char *datacheck = "Content-Type: gnss/data\r\n";
727 const char *chunkycheck = "Transfer-Encoding: chunked\r\n";
728 int l = strlen(datacheck)-1;
729 int j=0;
730 for(i = 0; j != l && i < nBufferBytes-l; ++i) {
731 for(j = 0; j < l && szSendBuffer[i+j] == datacheck[j]; ++j)
732 ;
733 }
734 if(i == nBufferBytes-l) {
735 fprintf(stderr, "No 'Content-Type: gnss/data' found\n");
736 input_init = 0;
737 }
738 l = strlen(chunkycheck)-1;
739 j=0;
740 for(i = 0; j != l && i < nBufferBytes-l; ++i) {
741 for(j = 0; j < l && szSendBuffer[i+j] == chunkycheck[j]; ++j)
742 ;
743 }
744 if(i < nBufferBytes-l)
745 chunkymode = 1;
746 init = 1;
747 }
748 else if (strstr(szSendBuffer, "\r\n")) {
749 if (!strstr(szSendBuffer, "ICY 200 OK")) {
750 int k;
751 fprintf(stderr, "ERROR: could not get requested data from Source caster: ");
752 for (k = 0; k < nBufferBytes && szSendBuffer[k] != '\n' && szSendBuffer[k] != '\r'; ++k) {
753 fprintf(stderr, "%c", isprint(szSendBuffer[k]) ? szSendBuffer[k] : '.');
754 }
755 fprintf(stderr, "\n");
756 if (!strstr(szSendBuffer, "SOURCETABLE 200 OK")) {
757 reconnect_sec_max = 0;
758 }
759 input_init = 0;
760 break;
761 }
762 init = 1;
763 }
764
765 }
766 /* end input from NTRIP caster */
767
768 if (initfile && inputmode != SISNET) {
769 char buffer[1024];
770 FILE *fh;
771 int i;
772
773 if ((fh = fopen(initfile, "r"))) {
774 while ((i = fread(buffer, 1, sizeof(buffer), fh)) > 0) {
775 if ((send(gps_socket, buffer, (size_t) i, 0)) != i) {
776 perror("WARNING: sending init file");
777 input_init = 0;
778 break;
779 }
780 }
781 if (i < 0) {
782 perror("ERROR: reading init file");
783 reconnect_sec_max = 0;
784 input_init = 0;
785 break;
786 }
787 fclose(fh);
788 } else {
789 fprintf(stderr, "ERROR: can't read init file <%s>\n", initfile);
790 reconnect_sec_max = 0;
791 input_init = 0;
792 break;
793 }
794 }
795 }
796 if (inputmode == SISNET) {
797 int i, j;
798 char buffer[1024];
799
800 i = snprintf(buffer, sizeof(buffer),
801 sisnet >= 30 ? "AUTH,%s,%s\r\n" : "AUTH,%s,%s", sisnetuser,
802 sisnetpassword);
803 if ((send(gps_socket, buffer, (size_t) i, 0)) != i) {
804 perror("WARNING: sending authentication for SISNeT data server");
805 input_init = 0;
806 break;
807 }
808 i = sisnet >= 30 ? 7 : 5;
809 if ((j = recv(gps_socket, buffer, i, 0)) != i
810 && strncmp("*AUTH", buffer, 5)) {
811 fprintf(stderr, "WARNING: SISNeT connect failed:");
812 for (i = 0; i < j; ++i) {
813 if (buffer[i] != '\r' && buffer[i] != '\n') {
814 fprintf(stderr, "%c", isprint(buffer[i]) ? buffer[i] : '.');
815 }
816 }
817 fprintf(stderr, "\n");
818 input_init = 0;
819 break;
820 }
821 if (sisnet >= 31) {
822 if ((send(gps_socket, "START\r\n", 7, 0)) != i) {
823 perror("WARNING: sending Sisnet start command");
824 input_init = 0;
825 break;
826 }
827 }
828 }
829 /*** receiver authentication ***/
830 if (recvrid && recvrpwd
831 && ((inputmode == TCPSOCKET) || (inputmode == UDPSOCKET))) {
832 if (strlen(recvrid) > (BUFSZ - 3)) {
833 fprintf(stderr, "ERROR: Receiver ID too long\n");
834 reconnect_sec_max = 0;
835 input_init = 0;
836 break;
837 } else {
838 fprintf(stderr, "Sending user ID for receiver...\n");
839 nBufferBytes = recv(gps_socket, szSendBuffer, BUFSZ, 0);
840 strcpy(szSendBuffer, recvrid);
841 strcat(szSendBuffer, "\r\n");
842 if (send(gps_socket, szSendBuffer, strlen(szSendBuffer),
843 MSG_DONTWAIT) < 0) {
844 perror("WARNING: sending user ID for receiver");
845 input_init = 0;
846 break;
847 }
848 }
849
850 if (strlen(recvrpwd) > (BUFSZ - 3)) {
851 fprintf(stderr, "ERROR: Receiver password too long\n");
852 reconnect_sec_max = 0;
853 input_init = 0;
854 break;
855 } else {
856 fprintf(stderr, "Sending user password for receiver...\n");
857 nBufferBytes = recv(gps_socket, szSendBuffer, BUFSZ, 0);
858 strcpy(szSendBuffer, recvrpwd);
859 strcat(szSendBuffer, "\r\n");
860 if (send(gps_socket, szSendBuffer, strlen(szSendBuffer),
861 MSG_DONTWAIT) < 0) {
862 perror("WARNING: sending user password for receiver");
863 input_init = 0;
864 break;
865 }
866 }
867 }
868 break;
869 default:
870 usage(-1, argv[0]);
871 break;
872 }
873
874 /* ----- main part ----- */
875 int output_init = 1, fallback = 0;
876
877 while ((input_init) && (output_init)) {
878#ifndef WINDOWSVERSION
879 if ((sigalarm_received) || (sigint_received) || (sigpipe_received))
880 break;
881#else
882 if((sigalarm_received) || (sigint_received)) break;
883#endif
884
885 if (!(he = gethostbyname(outhost))) {
886 fprintf(stderr,
887 "ERROR: Destination caster, server or proxy host <%s> unknown\n",
888 outhost);
889 close_session(casterouthost, mountpoint, session, rtsp_extension, 0);
890 usage(-2, argv[0]);
891 }
892 else {
893 fprintf(stderr,
894 "Destination caster, server or proxy host <%s> \n",
895 outhost);}
896
897 /* create socket */
898 if ((socket_tcp = socket(AF_INET, (outputmode == UDP ? SOCK_DGRAM : SOCK_STREAM), 0)) == INVALID_SOCKET) {
899 perror("ERROR: tcp socket");
900 reconnect_sec_max = 0;
901 break;
902 }
903
904 if (outputmode == TCPIP) {
905 // Forcefully attaching socket to the local port
906 int opt = 1;
907 if (setsockopt(socket_tcp, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT,
908 &opt, sizeof(opt))) {
909 perror("ERROR: setsockopt");
910 break;
911 }
912 }
913 memset((char*) &caster, 0x00, sizeof(caster));
914 memcpy(&caster.sin_addr, he->h_addr, (size_t)he->h_length);
915 caster.sin_family = AF_INET;
916 caster.sin_port = htons(outport);
917
918 /* connect to Destination caster, server or proxy host */
919 fprintf(stderr, "caster|server output: host = %s, port = %d, mountpoint = %s"
920 ", mode = %s\n\n", inet_ntoa(caster.sin_addr), outport, mountpoint,
921 outputmode == NTRIP1 ? "ntrip1" :
922 outputmode == HTTP ? "http" :
923 outputmode == UDP ? "udp" :
924 outputmode == RTSP ? "rtsp" : "tcpip");
925
926 if (outputmode == TCPIP) {
927 caster.sin_addr.s_addr = INADDR_ANY;
928 // Forcefully attaching socket to the local port
929 if (bind(socket_tcp, (struct sockaddr *)&caster, sizeof(caster)) < 0) {
930 perror("ERROR: bind failed");
931 reconnect_sec_max = 0;
932 output_init = 0;
933 break;
934 }
935 if (listen(socket_tcp, 3) < 0) {
936 perror("listen");
937 reconnect_sec_max = 0;
938 output_init = 0;
939 break;
940 }
941 int addrlen = sizeof(caster);
942 if ((local_socket_tcp = accept(socket_tcp, (struct sockaddr *)&caster,
943 (socklen_t*)&addrlen)) < 0) {
944 perror("ERROR: accept");
945 reconnect_sec_max = 0;
946 output_init = 0;
947 break;
948 }
949 }
950 else {
951 if (connect(socket_tcp, (struct sockaddr*) &caster, sizeof(caster)) < 0) {
952 fprintf(stderr, "WARNING: can't connect output to %s at port %d",
953 inet_ntoa(caster.sin_addr), outport);
954 break;
955 }
956 }
957
958 /*** OutputMode handling ***/
959 switch (outputmode) {
960 case UDP: {
961 unsigned int session;
962 char rtpbuf[1526];
963 int i = 12, j;
964
965 udp_init = time(0);
966 srand(udp_init);
967 session = rand();
968 udp_tim = rand();
969 udp_seq = rand();
970
971 rtpbuf[0] = (2 << 6);
972 /* padding, extension, csrc are empty */
973 rtpbuf[1] = 97;
974 /* marker is empty */
975 rtpbuf[2] = (udp_seq >> 8) & 0xFF;
976 rtpbuf[3] = (udp_seq) & 0xFF;
977 rtpbuf[4] = (udp_tim >> 24) & 0xFF;
978 rtpbuf[5] = (udp_tim >> 16) & 0xFF;
979 rtpbuf[6] = (udp_tim >> 8) & 0xFF;
980 rtpbuf[7] = (udp_tim) & 0xFF;
981 /* sequence and timestamp are empty */
982 rtpbuf[8] = (session >> 24) & 0xFF;
983 rtpbuf[9] = (session >> 16) & 0xFF;
984 rtpbuf[10] = (session >> 8) & 0xFF;
985 rtpbuf[11] = (session) & 0xFF;
986 ++udp_seq;
987
988 j = snprintf(rtpbuf + i, sizeof(rtpbuf) - i - 40, /* leave some space for login */
989 "POST /%s HTTP/1.1\r\n"
990 "Host: %s\r\n"
991 "Ntrip-Version: Ntrip/2.0\r\n"
992 "User-Agent: %s/%s\r\n"
993 "Authorization: Basic %s%s%s\r\n"
994 "Connection: close\r\n"
995 "Transfer-Encoding: chunked\r\n\r\n", mountpoint, casterouthost,
996 AGENTSTRING, revisionstr, authorization,
997 ntrip_str ?
998 (outputmode == NTRIP1 ? "\r\nSTR: " : "\r\nNtrip-STR: ") : "",
999 ntrip_str);
1000 i += j;
1001 if (i > (int) sizeof(rtpbuf) - 40 || j < 0) /* second check for old glibc */
1002 {
1003 fprintf(stderr, "Requested data too long\n");
1004 reconnect_sec_max = 0;
1005 output_init = 0;
1006 break;
1007 } else {
1008 rtpbuf[i++] = '\r';
1009 rtpbuf[i++] = '\n';
1010 rtpbuf[i++] = '\r';
1011 rtpbuf[i++] = '\n';
1012
1013 if (send(socket_tcp, rtpbuf, i, 0) != i) {
1014 perror("Could not send UDP packet");
1015 reconnect_sec_max = 0;
1016 output_init = 0;
1017 break;
1018 } else {
1019 int stop = 0;
1020 int numbytes;
1021 if ((numbytes = recv(socket_tcp, rtpbuf, sizeof(rtpbuf) - 1, 0))
1022 > 0) {
1023 /* we don't expect message longer than 1513, so we cut the last
1024 byte for security reasons to prevent buffer overrun */
1025 rtpbuf[numbytes] = 0;
1026 if (numbytes > 17 + 12
1027 && (!strncmp(rtpbuf + 12, "HTTP/1.1 200 OK\r\n", 17)
1028 || !strncmp(rtpbuf + 12, "HTTP/1.0 200 OK\r\n", 17))) {
1029 const char *sessioncheck = "session: ";
1030 int l = strlen(sessioncheck) - 1;
1031 int j = 0;
1032 for (i = 12; j != l && i < numbytes - l; ++i) {
1033 for (j = 0;
1034 j < l && tolower(rtpbuf[i + j]) == sessioncheck[j]; ++j)
1035 ;
1036 }
1037 if (i != numbytes - l) /* found a session number */
1038 {
1039 i += l;
1040 session = 0;
1041 while (i < numbytes && rtpbuf[i] >= '0' && rtpbuf[i] <= '9')
1042 session = session * 10 + rtpbuf[i++] - '0';
1043 if (rtpbuf[i] != '\r') {
1044 fprintf(stderr, "Could not extract session number\n");
1045 stop = 1;
1046 }
1047 }
1048 } else {
1049 int k;
1050 fprintf(stderr, "Could not access mountpoint: ");
1051 for (k = 12;
1052 k < numbytes && rtpbuf[k] != '\n' && rtpbuf[k] != '\r';
1053 ++k) {
1054 fprintf(stderr, "%c", isprint(rtpbuf[k]) ? rtpbuf[k] : '.');
1055 }
1056 fprintf(stderr, "\n");
1057 stop = 1;
1058 }
1059 }
1060 if (!stop) {
1061 send_receive_loop(socket_tcp, outputmode, NULL, 0, session, chunkymode);
1062 input_init = output_init = 0;
1063 /* send connection close always to allow nice session closing */
1064 udp_tim += (time(0) - udp_init) * 1000000 / TIME_RESOLUTION;
1065 rtpbuf[0] = (2 << 6);
1066 /* padding, extension, csrc are empty */
1067 rtpbuf[1] = 98;
1068 /* marker is empty */
1069 rtpbuf[2] = (udp_seq >> 8) & 0xFF;
1070 rtpbuf[3] = (udp_seq) & 0xFF;
1071 rtpbuf[4] = (udp_tim >> 24) & 0xFF;
1072 rtpbuf[5] = (udp_tim >> 16) & 0xFF;
1073 rtpbuf[6] = (udp_tim >> 8) & 0xFF;
1074 rtpbuf[7] = (udp_tim) & 0xFF;
1075 /* sequence and timestamp are empty */
1076 rtpbuf[8] = (session >> 24) & 0xFF;
1077 rtpbuf[9] = (session >> 16) & 0xFF;
1078 rtpbuf[10] = (session >> 8) & 0xFF;
1079 rtpbuf[11] = (session) & 0xFF;
1080
1081 send(socket_tcp, rtpbuf, 12, 0); /* cleanup */
1082 } else {
1083 reconnect_sec_max = 600;
1084 output_init = 0;
1085 }
1086 }
1087 }
1088 }
1089 break;
1090 case NTRIP1: /*** OutputMode Ntrip Version 1.0 ***/
1091 fallback = 0;
1092 nBufferBytes = snprintf(szSendBuffer, sizeof(szSendBuffer),
1093 "SOURCE %s %s/%s\r\n"
1094 "Source-Agent: %s/%s\r\n\r\n", password, post_extension,
1095 mountpoint, AGENTSTRING, revisionstr);
1096 if ((nBufferBytes > (int) sizeof(szSendBuffer))
1097 || (nBufferBytes < 0)) {
1098 fprintf(stderr, "ERROR: Destination caster request to long\n");
1099 reconnect_sec_max = 0;
1100 output_init = 0;
1101 break;
1102 }
1103 if (!send_to_caster(szSendBuffer, socket_tcp, nBufferBytes)) {
1104 output_init = 0;
1105 break;
1106 }
1107 /* check Destination caster's response */
1108 nBufferBytes = recv(socket_tcp, szSendBuffer, sizeof(szSendBuffer), 0);
1109 szSendBuffer[nBufferBytes] = '\0';
1110 if (!strstr(szSendBuffer, "OK")) {
1111 char *a;
1112 fprintf(stderr,
1113 "ERROR: Destination caster's or Proxy's reply is not OK: ");
1114 for (a = szSendBuffer; *a && *a != '\n' && *a != '\r'; ++a) {
1115 fprintf(stderr, "%.1s", isprint(*a) ? a : ".");
1116 }
1117 fprintf(stderr, "\n");
1118 if ((strstr(szSendBuffer, "ERROR - Bad Password"))
1119 || (strstr(szSendBuffer, "400 Bad Request")))
1120 reconnect_sec_max = 0;
1121 output_init = 0;
1122 break;
1123 }
1124#ifndef NDEBUG
1125 else {
1126 fprintf(stderr, "Destination caster response:\n%s\n", szSendBuffer);
1127 }
1128#endif
1129 send_receive_loop(socket_tcp, outputmode, NULL, 0, 0, chunkymode);
1130 input_init = output_init = 0;
1131 break;
1132 case HTTP: /*** Ntrip-Version 2.0 HTTP/1.1 ***/
1133 nBufferBytes = snprintf(szSendBuffer, sizeof(szSendBuffer),
1134 "POST %s/%s HTTP/1.1\r\n"
1135 "Host: %s\r\n"
1136 "Ntrip-Version: Ntrip/2.0\r\n"
1137 "User-Agent: %s/%s\r\n"
1138 "Authorization: Basic %s%s%s\r\n"
1139 "Connection: close\r\n"
1140 "Transfer-Encoding: chunked\r\n\r\n", post_extension,
1141 mountpoint, casterouthost, AGENTSTRING, revisionstr,
1142 authorization, ntrip_str ? "\r\nNtrip-STR: " : "", ntrip_str);
1143 if ((nBufferBytes > (int) sizeof(szSendBuffer))
1144 || (nBufferBytes < 0)) {
1145 fprintf(stderr, "ERROR: Destination caster request to long\n");
1146 reconnect_sec_max = 0;
1147 output_init = 0;
1148 break;
1149 }
1150 if (!send_to_caster(szSendBuffer, socket_tcp, nBufferBytes)) {
1151 output_init = 0;
1152 break;
1153 }
1154 /* check Destination caster's response */
1155 nBufferBytes = recv(socket_tcp, szSendBuffer, sizeof(szSendBuffer), 0);
1156 szSendBuffer[nBufferBytes] = '\0';
1157 if (!strstr(szSendBuffer, "HTTP/1.1 200 OK")) {
1158 char *a;
1159 fprintf(stderr, "ERROR: Destination caster's%s reply is not OK: ",
1160 *proxyhost ? " or Proxy's" : "");
1161 for (a = szSendBuffer; *a && *a != '\n' && *a != '\r'; ++a) {
1162 fprintf(stderr, "%.1s", isprint(*a) ? a : ".");
1163 }
1164 fprintf(stderr, "\n");
1165 /* fallback if necessary */
1166 if (!strstr(szSendBuffer, "Ntrip-Version: Ntrip/2.0\r\n")) {
1167 fprintf(stderr,
1168 " Ntrip Version 2.0 not implemented at Destination caster"
1169 " <%s>%s%s%s\n%s\n"
1170 "ntripserver falls back to Ntrip Version 1.0\n\n",
1171 casterouthost, *proxyhost ? " or Proxy <" : "", proxyhost,
1172 *proxyhost ? ">" : "",
1173 *proxyhost ?
1174 " or HTTP/1.1 not implemented at Proxy\n" : "");
1175 close_session(casterouthost, mountpoint, session, rtsp_extension, 1);
1176 outputmode = NTRIP1;
1177 break;
1178 } else if ((strstr(szSendBuffer, "HTTP/1.1 401 Unauthorized"))
1179 || (strstr(szSendBuffer, "501 Not Implemented"))) {
1180 reconnect_sec_max = 0;
1181 }
1182 output_init = 0;
1183 break;
1184 }
1185#ifndef NDEBUG
1186 else {
1187 fprintf(stderr, "Destination caster response:\n%s\n", szSendBuffer);
1188 }
1189#endif
1190 send_receive_loop(socket_tcp, outputmode, NULL, 0, 0, chunkymode);
1191 input_init = output_init = 0;
1192 break;
1193 case RTSP: /*** Ntrip-Version 2.0 RTSP / RTP ***/
1194 if ((socket_udp = socket(AF_INET, SOCK_DGRAM, 0)) == INVALID_SOCKET) {
1195 perror("ERROR: udp socket");
1196 exit(4);
1197 }
1198 /* fill structure with local address information for UDP */
1199 memset(&local, 0, sizeof(local));
1200 local.sin_family = AF_INET;
1201 local.sin_port = htons(0);
1202 local.sin_addr.s_addr = htonl(INADDR_ANY);
1203 len = (socklen_t) sizeof(local);
1204 /* bind() in order to get a random RTP client_port */
1205 if ((bind(socket_udp, (struct sockaddr*) &local, len)) < 0) {
1206 perror("ERROR: udp bind");
1207 reconnect_sec_max = 0;
1208 output_init = 0;
1209 break;
1210 }
1211 if ((getsockname(socket_udp, (struct sockaddr*) &local, &len)) != -1) {
1212 client_port = (unsigned int) ntohs(local.sin_port);
1213 } else {
1214 perror("ERROR: getsockname(localhost)");
1215 reconnect_sec_max = 0;
1216 output_init = 0;
1217 break;
1218 }
1219 nBufferBytes = snprintf(szSendBuffer, sizeof(szSendBuffer),
1220 "SETUP rtsp://%s%s/%s RTSP/1.0\r\n"
1221 "CSeq: %d\r\n"
1222 "Ntrip-Version: Ntrip/2.0\r\n"
1223 "Ntrip-Component: Ntripserver\r\n"
1224 "User-Agent: %s/%s\r\n"
1225 "Transport: RTP/GNSS;unicast;client_port=%u\r\n"
1226 "Authorization: Basic %s%s%s\r\n\r\n", casterouthost,
1227 rtsp_extension, mountpoint, udp_cseq++, AGENTSTRING, revisionstr,
1228 client_port, authorization, ntrip_str ? "\r\nNtrip-STR: " : "",
1229 ntrip_str);
1230 if ((nBufferBytes > (int) sizeof(szSendBuffer))
1231 || (nBufferBytes < 0)) {
1232 fprintf(stderr, "ERROR: Destination caster request to long\n");
1233 reconnect_sec_max = 0;
1234 output_init = 0;
1235 break;
1236 }
1237 if (!send_to_caster(szSendBuffer, socket_tcp, nBufferBytes)) {
1238 output_init = 0;
1239 break;
1240 }
1241 while ((nBufferBytes = recv(socket_tcp, szSendBuffer,
1242 sizeof(szSendBuffer), 0)) > 0) {
1243 /* check Destination caster's response */
1244 szSendBuffer[nBufferBytes] = '\0';
1245 if (!strstr(szSendBuffer, "RTSP/1.0 200 OK")) {
1246 char *a;
1247 fprintf(stderr, "ERROR: Destination caster's%s reply is not OK: ",
1248 *proxyhost ? " or Proxy's" : "");
1249 for (a = szSendBuffer; *a && *a != '\n' && *a != '\r'; ++a) {
1250 fprintf(stderr, "%c", isprint(*a) ? *a : '.');
1251 }
1252 fprintf(stderr, "\n");
1253 /* fallback if necessary */
1254 if (strncmp(szSendBuffer, "RTSP", 4) != 0) {
1255 if (strstr(szSendBuffer, "Ntrip-Version: Ntrip/2.0\r\n")) {
1256 fprintf(stderr,
1257 " RTSP not implemented at Destination caster <%s>%s%s%s\n\n"
1258 "ntripserver falls back to Ntrip Version 2.0 in TCP/IP"
1259 " mode\n\n", casterouthost,
1260 *proxyhost ? " or Proxy <" : "", proxyhost,
1261 *proxyhost ? ">" : "");
1262 close_session(casterouthost, mountpoint, session,
1263 rtsp_extension, 1);
1264 outputmode = HTTP;
1265 fallback = 1;
1266 break;
1267 } else {
1268 fprintf(stderr,
1269 " Ntrip-Version 2.0 not implemented at Destination caster"
1270 "<%s>%s%s%s\n%s"
1271 " or RTSP/1.0 not implemented at Destination caster%s\n\n"
1272 "ntripserver falls back to Ntrip Version 1.0\n\n",
1273 casterouthost, *proxyhost ? " or Proxy <" : "", proxyhost,
1274 *proxyhost ? ">" : "",
1275 *proxyhost ?
1276 " or HTTP/1.1 not implemented at Proxy\n" : "",
1277 *proxyhost ? " or Proxy" : "");
1278 close_session(casterouthost, mountpoint, session,
1279 rtsp_extension, 1);
1280 outputmode = NTRIP1;
1281 fallback = 1;
1282 break;
1283 }
1284 } else if ((strstr(szSendBuffer, "RTSP/1.0 401 Unauthorized"))
1285 || (strstr(szSendBuffer, "RTSP/1.0 501 Not Implemented"))) {
1286 reconnect_sec_max = 0;
1287 }
1288 output_init = 0;
1289 break;
1290 }
1291#ifndef NDEBUG
1292 else {
1293 fprintf(stderr, "Destination caster response:\n%s\n", szSendBuffer);
1294 }
1295#endif
1296 if ((strstr(szSendBuffer, "RTSP/1.0 200 OK\r\n"))
1297 && (strstr(szSendBuffer, "CSeq: 1\r\n"))) {
1298 for (token = strtok(szSendBuffer, dlim); token != NULL; token =
1299 strtok(NULL, dlim)) {
1300 tok_buf[i] = token;
1301 i++;
1302 }
1303 session = atoi(tok_buf[6]);
1304 server_port = atoi(tok_buf[10]);
1305 nBufferBytes = snprintf(szSendBuffer, sizeof(szSendBuffer),
1306 "RECORD rtsp://%s%s/%s RTSP/1.0\r\n"
1307 "CSeq: %d\r\n"
1308 "Session: %u\r\n"
1309 "\r\n", casterouthost, rtsp_extension, mountpoint,
1310 udp_cseq++, session);
1311 if ((nBufferBytes >= (int) sizeof(szSendBuffer))
1312 || (nBufferBytes < 0)) {
1313 fprintf(stderr, "ERROR: Destination caster request to long\n");
1314 reconnect_sec_max = 0;
1315 output_init = 0;
1316 break;
1317 }
1318 if (!send_to_caster(szSendBuffer, socket_tcp, nBufferBytes)) {
1319 output_init = 0;
1320 break;
1321 }
1322 } else if ((strstr(szSendBuffer, "RTSP/1.0 200 OK\r\n"))
1323 && (strstr(szSendBuffer, "CSeq: 2\r\n"))) {
1324 /* fill structure with caster address information for UDP */
1325 memset(&casterRTP, 0, sizeof(casterRTP));
1326 casterRTP.sin_family = AF_INET;
1327 casterRTP.sin_port = htons(((uint16_t) server_port));
1328 if ((he = gethostbyname(outhost)) == NULL) {
1329 fprintf(stderr, "ERROR: Destination caster unknown\n");
1330 reconnect_sec_max = 0;
1331 output_init = 0;
1332 break;
1333 } else {
1334 memcpy((char*) &casterRTP.sin_addr.s_addr, he->h_addr_list[0],
1335 (size_t) he->h_length);
1336 }
1337 len = (socklen_t) sizeof(casterRTP);
1338 send_receive_loop(socket_udp, outputmode,
1339 (struct sockaddr*) &casterRTP, (socklen_t) len, session, chunkymode);
1340 break;
1341 } else {
1342 break;
1343 }
1344 }
1345 input_init = output_init = 0;
1346 break;
1347 case TCPIP:
1348 fallback = 0;
1349 send_receive_loop(local_socket_tcp, outputmode, NULL, 0, 0, chunkymode);
1350 input_init = output_init = 0;
1351 break;
1352 }
1353 }
1354 close_session(casterouthost, mountpoint, session, rtsp_extension, 0);
1355 if ((reconnect_sec_max || fallback) && !sigint_received)
1356 reconnect_sec = reconnect(reconnect_sec, reconnect_sec_max);
1357 else
1358 inputmode = LAST;
1359 }
1360 return 0;
1361}
1362
1363static void send_receive_loop(sockettype sock, int outmode,
1364 struct sockaddr *pcasterRTP, socklen_t length, unsigned int rtpssrc,
1365 int chunkymode) {
1366 int nodata = 0;
1367 char buffer[BUFSZ] = { 0 };
1368 char sisnetbackbuffer[200];
1369 char szSendBuffer[BUFSZ] = "";
1370 int nBufferBytes = 0;
1371 int remainChunk = 0;
1372
1373 /* RTSP / RTP Mode */
1374 int isfirstpacket = 1;
1375 struct timeval now;
1376 struct timeval last = { 0, 0 };
1377 long int sendtimediff;
1378 int rtpseq = 0;
1379 int rtptime = 0;
1380 time_t laststate = time(0);
1381
1382 if (outmode == UDP) {
1383 rtptime = time(0);
1384#ifdef WINDOWSVERSION
1385 u_long blockmode = 1;
1386 if(ioctlsocket(socket_tcp, FIONBIO, &blockmode))
1387#else /* WINDOWSVERSION */
1388 if (fcntl(socket_tcp, F_SETFL, O_NONBLOCK) < 0)
1389#endif /* WINDOWSVERSION */
1390 {
1391 fprintf(stderr, "Could not set nonblocking mode\n");
1392 return;
1393 }
1394 } else if (outmode == RTSP) {
1395#ifdef WINDOWSVERSION
1396 u_long blockmode = 1;
1397 if(ioctlsocket(socket_tcp, FIONBIO, &blockmode))
1398#else /* WINDOWSVERSION */
1399 if (fcntl(socket_tcp, F_SETFL, O_NONBLOCK) < 0)
1400#endif /* WINDOWSVERSION */
1401 {
1402 fprintf(stderr, "Could not set nonblocking mode\n");
1403 return;
1404 }
1405 }
1406
1407 /* data transmission */
1408 fprintf(stderr, "transfering data ...\n");
1409 int send_recv_success = 0;
1410#ifdef WINDOWSVERSION
1411 time_t nodata_begin = 0, nodata_current = 0;
1412#endif
1413 while (1) {
1414 if (send_recv_success < 3)
1415 send_recv_success++;
1416 if (!nodata) {
1417#ifndef WINDOWSVERSION
1418 alarm(ALARMTIME);
1419#else
1420 time(&nodata_begin);
1421#endif
1422 } else {
1423 nodata = 0;
1424#ifdef WINDOWSVERSION
1425 time(&nodata_current);
1426 if(difftime(nodata_current, nodata_begin) >= ALARMTIME) {
1427 sigalarm_received = 1;
1428 fprintf(stderr, "ERROR: more than %d seconds no activity\n", ALARMTIME);
1429 }
1430#endif
1431 }
1432 /* signal handling*/
1433#ifdef WINDOWSVERSION
1434 if((sigalarm_received) || (sigint_received)) break;
1435#else
1436 if ((sigalarm_received) || (sigint_received) || (sigpipe_received))
1437 break;
1438#endif
1439 if (!nBufferBytes) {
1440 if (inputmode == SISNET && sisnet <= 30) {
1441 int i;
1442 /* a somewhat higher rate than 1 second to get really each block */
1443 /* means we need to skip double blocks sometimes */
1444 struct timeval tv = { 0, 700000 };
1445 select(0, 0, 0, 0, &tv);
1446 memcpy(sisnetbackbuffer, buffer, sizeof(sisnetbackbuffer));
1447 i = (sisnet >= 30 ? 5 : 3);
1448 if ((send(gps_socket, "MSG\r\n", i, 0)) != i) {
1449 perror("WARNING: sending SISNeT data request failed");
1450 return;
1451 }
1452 }
1453 /***********************/
1454 /* receiving data */
1455 /***********************/
1456
1457 /* INFILE */
1458 if (inputmode == INFILE)
1459 nBufferBytes = read(gps_file, buffer, sizeof(buffer));
1460
1461 /* SERIAL */
1462 else if (inputmode == SERIAL) {
1463#ifndef WINDOWSVERSION
1464 nBufferBytes = read(gps_serial, buffer, sizeof(buffer));
1465#else
1466 DWORD nRead = 0;
1467 if(!ReadFile(gps_serial, buffer, sizeof(buffer), &nRead, NULL))
1468 {
1469 fprintf(stderr,"ERROR: reading serial input failed\n");
1470 return;
1471 }
1472 nBufferBytes = (int)nRead;
1473#endif
1474 }
1475
1476 /* ALL OTHER MODES */
1477 else
1478#ifdef WINDOWSVERSION
1479 nBufferBytes = recv(gps_socket, buffer, sizeof(buffer), 0);
1480#else
1481 nBufferBytes = read(gps_socket, buffer, sizeof(buffer));
1482#endif
1483
1484 if (!nBufferBytes) {
1485 fprintf(stderr, "WARNING: no data received from input\n");
1486 nodata = 1;
1487#ifndef WINDOWSVERSION
1488 sleep(3);
1489#else
1490 Sleep(3*1000);
1491#endif
1492 continue;
1493 } else if ((nBufferBytes < 0) && (!sigint_received)) {
1494 perror("WARNING: reading input failed");
1495 return;
1496 }
1497 /* we can compare the whole buffer, as the additional bytes
1498 remain unchanged */
1499 if (inputmode == SISNET && sisnet <= 30
1500 && !memcmp(sisnetbackbuffer, buffer, sizeof(sisnetbackbuffer))) {
1501 nBufferBytes = 0;
1502 }
1503 }
1504 if (nBufferBytes < 0)
1505 return;
1506
1507 if (chunkymode) {
1508 int cstop = 0;
1509 int pos = 0;
1510 int totalbytes = 0;
1511 static int chunksize = 0;
1512 static long i = 0;
1513 char chunkBytes[BUFSZ] = { 0 };
1514
1515 while (!sigint_received && !cstop && pos < nBufferBytes) {
1516 switch (chunkymode) {
1517 case 1: /* reading number starts */
1518 chunksize = 0;
1519 ++chunkymode; /* no break */
1520 break;
1521 case 2: /* during reading number */
1522 i = buffer[pos++];
1523 if (i >= '0' && i <= '9')
1524 chunksize = chunksize * 16 + i - '0';
1525 else if (i >= 'a' && i <= 'f')
1526 chunksize = chunksize * 16 + i - 'a' + 10;
1527 else if (i >= 'A' && i <= 'F')
1528 chunksize = chunksize * 16 + i - 'A' + 10;
1529 else if (i == '\r')
1530 ++chunkymode;
1531 else if (i == ';')
1532 chunkymode = 5;
1533 else
1534 cstop = 1;
1535 break;
1536 case 3: /* scanning for return */
1537 if (buffer[pos++] == '\n')
1538 chunkymode = chunksize ? 4 : 1;
1539 else
1540 cstop = 1;
1541 break;
1542 case 4: /* output data */
1543 i = nBufferBytes - pos;
1544 if (i > chunksize) {
1545 i = chunksize;
1546 }
1547 memcpy(chunkBytes + totalbytes, buffer + pos, (size_t) i);
1548 totalbytes += i;
1549 chunksize -= i;
1550 pos += i;
1551 if (!chunksize)
1552 chunkymode = 1;
1553 break;
1554 case 5:
1555 if (i == '\r')
1556 chunkymode = 3;
1557 break;
1558 }
1559 }
1560 if (cstop) {
1561 fprintf(stderr, "Error in chunky transfer encoding\n");
1562 return;
1563 }
1564 else {
1565 memset((char*) &buffer, 0x00, sizeof(buffer));
1566 memcpy(buffer, chunkBytes, (size_t) totalbytes);
1567 nBufferBytes = totalbytes;
1568 }
1569 }
1570
1571 /*****************/
1572 /* send data */
1573 /*****************/
1574 if ((nBufferBytes) && (outmode == NTRIP1 || outmode == TCPIP)) {
1575 int i;
1576 if ((i = send(sock, buffer, (size_t) nBufferBytes, MSG_DONTWAIT)) != nBufferBytes) {
1577 if (i < 0) {
1578 if (errno != EAGAIN) {
1579 perror("WARNING: could not send data to Destination caster or localhost");
1580 return;
1581 }
1582 } else if (i) {
1583 memmove(buffer, buffer + i, (size_t) (nBufferBytes - i));
1584 nBufferBytes -= i;
1585 }
1586 } else {
1587 nBufferBytes = 0;
1588 }
1589 }
1590 else if ((nBufferBytes) && (outmode == UDP)) {
1591 char rtpbuf[1592];
1592 int i;
1593 int ct = time(0);
1594 udp_tim += (ct - udp_init) * 1000000 / TIME_RESOLUTION;
1595 udp_init = ct;
1596 rtpbuf[0] = (2 << 6);
1597 rtpbuf[1] = 96;
1598 rtpbuf[2] = (udp_seq >> 8) & 0xFF;
1599 rtpbuf[3] = (udp_seq) & 0xFF;
1600 rtpbuf[4] = (udp_tim >> 24) & 0xFF;
1601 rtpbuf[5] = (udp_tim >> 16) & 0xFF;
1602 rtpbuf[6] = (udp_tim >> 8) & 0xFF;
1603 rtpbuf[7] = (udp_tim) & 0xFF;
1604 rtpbuf[8] = (rtpssrc >> 24) & 0xFF;
1605 rtpbuf[9] = (rtpssrc >> 16) & 0xFF;
1606 rtpbuf[10] = (rtpssrc >> 8) & 0xFF;
1607 rtpbuf[11] = (rtpssrc) & 0xFF;
1608 ++udp_seq;
1609 memcpy(rtpbuf + 12, buffer, nBufferBytes);
1610 if ((i = send(socket_tcp, rtpbuf, (size_t) nBufferBytes + 12, MSG_DONTWAIT)) != nBufferBytes + 12) {
1611 if (errno != EAGAIN) {
1612 perror("WARNING: could not send data to Destination caster");
1613 return;
1614 }
1615 } else
1616 nBufferBytes = 0;
1617 i = recv(socket_tcp, rtpbuf, sizeof(rtpbuf), 0);
1618 if (i >= 12 && (unsigned char) rtpbuf[0] == (2 << 6)
1619 && rtpssrc
1620 == (unsigned int) (((unsigned char) rtpbuf[8] << 24)
1621 + ((unsigned char) rtpbuf[9] << 16)
1622 + ((unsigned char) rtpbuf[10] << 8)
1623 + (unsigned char) rtpbuf[11])) {
1624 if (rtpbuf[1] == 96)
1625 rtptime = time(0);
1626 else if (rtpbuf[1] == 98) {
1627 fprintf(stderr, "Connection end\n");
1628 return;
1629 }
1630 } else if (time(0) > rtptime + 60) {
1631 fprintf(stderr, "Timeout\n");
1632 return;
1633 }
1634 }
1635 /*** Ntrip-Version 2.0 HTTP/1.1 ***/
1636 else if ((nBufferBytes) && (outmode == HTTP)) {
1637 if (!remainChunk) {
1638 int nChunkBytes = snprintf(szSendBuffer, sizeof(szSendBuffer), "%x\r\n", nBufferBytes);
1639 send(sock, szSendBuffer, nChunkBytes, 0);
1640 remainChunk = nBufferBytes;
1641 }
1642 int i = send(sock, buffer, (size_t) remainChunk, MSG_DONTWAIT);
1643 if (i < 0) {
1644 if (errno != EAGAIN) {
1645 perror("WARNING: could not send data to Destination caster");
1646 return;
1647 }
1648 } else if (i) {
1649 memmove(buffer, buffer + i, (size_t) (nBufferBytes - i));
1650 nBufferBytes -= i;
1651 remainChunk -= i;
1652 } else {
1653 nBufferBytes = 0;
1654 remainChunk = 0;
1655 }
1656 if (!remainChunk)
1657 send(sock, "\r\n", strlen("\r\n"), 0);
1658 }
1659 /*** Ntrip-Version 2.0 RTSP(TCP) / RTP(UDP) ***/
1660 else if ((nBufferBytes) && (outmode == RTSP)) {
1661 time_t ct;
1662 int r;
1663 char rtpbuffer[BUFSZ + 12];
1664 int i, j;
1665 gettimeofday(&now, NULL);
1666 /* RTP data packet generation*/
1667 if (isfirstpacket) {
1668 rtpseq = rand();
1669 rtptime = rand();
1670 last = now;
1671 isfirstpacket = 0;
1672 } else {
1673 ++rtpseq;
1674 sendtimediff = (((now.tv_sec - last.tv_sec) * 1000000)
1675 + (now.tv_usec - last.tv_usec));
1676 rtptime += sendtimediff / TIME_RESOLUTION;
1677 }
1678 rtpbuffer[0] = (RTP_VERSION << 6);
1679 /* padding, extension, csrc are empty */
1680 rtpbuffer[1] = 96;
1681 /* marker is empty */
1682 rtpbuffer[2] = rtpseq >> 8;
1683 rtpbuffer[3] = rtpseq;
1684 rtpbuffer[4] = rtptime >> 24;
1685 rtpbuffer[5] = rtptime >> 16;
1686 rtpbuffer[6] = rtptime >> 8;
1687 rtpbuffer[7] = rtptime;
1688 rtpbuffer[8] = rtpssrc >> 24;
1689 rtpbuffer[9] = rtpssrc >> 16;
1690 rtpbuffer[10] = rtpssrc >> 8;
1691 rtpbuffer[11] = rtpssrc;
1692 for (j = 0; j < nBufferBytes; j++) {
1693 rtpbuffer[12 + j] = buffer[j];
1694 }
1695 last.tv_sec = now.tv_sec;
1696 last.tv_usec = now.tv_usec;
1697 if ((i = sendto(sock, rtpbuffer, 12 + nBufferBytes, 0, pcasterRTP, length))
1698 != (nBufferBytes + 12)) {
1699 if (i < 0) {
1700 if (errno != EAGAIN) {
1701 perror("WARNING: could not send data to Destination caster");
1702 return;
1703 }
1704 } else if (i) {
1705 memmove(buffer, buffer + (i - 12),
1706 (size_t) (nBufferBytes - (i - 12)));
1707 nBufferBytes -= i - 12;
1708 }
1709 } else {
1710 nBufferBytes = 0;
1711 }
1712 ct = time(0);
1713 if (ct - laststate > 15) {
1714 i = snprintf(buffer, sizeof(buffer),
1715 "GET_PARAMETER rtsp://%s%s/%s RTSP/1.0\r\n"
1716 "CSeq: %d\r\n"
1717 "Session: %u\r\n"
1718 "\r\n", casterouthost, rtsp_extension, mountpoint, udp_cseq++,
1719 rtpssrc);
1720 if (i > (int) sizeof(buffer) || i < 0) {
1721 fprintf(stderr, "Requested data too long\n");
1722 return;
1723 } else if (send(socket_tcp, buffer, (size_t) i, 0) != i) {
1724 perror("send");
1725 return;
1726 }
1727 laststate = ct;
1728 }
1729 /* ignore RTSP server replies */
1730 if ((r = recv(socket_tcp, buffer, sizeof(buffer), 0)) < 0) {
1731#ifdef WINDOWSVERSION
1732 if(WSAGetLastError() != WSAEWOULDBLOCK)
1733#else /* WINDOWSVERSION */
1734 if (errno != EAGAIN)
1735#endif /* WINDOWSVERSION */
1736 {
1737 fprintf(stderr, "Control connection closed\n");
1738 return;
1739 }
1740 } else if (!r) {
1741 fprintf(stderr, "Control connection read error\n");
1742 return;
1743 }
1744 }
1745 if (send_recv_success == 3)
1746 reconnect_sec = 1;
1747 }
1748 return;
1749}
1750
1751/********************************************************************
1752 * openserial
1753 *
1754 * Open the serial port with the given device name and configure it for
1755 * reading NMEA data from a GPS receiver.
1756 *
1757 * Parameters:
1758 * tty : pointer to : A zero-terminated string containing the device
1759 * unsigned char name of the appropriate serial port.
1760 * blocksz : integer : Block size for port I/O (ifndef WINDOWSVERSION)
1761 * baud : integer : Baud rate for port I/O
1762 *
1763 * Return Value:
1764 * The function returns a file descriptor for the opened port if successful.
1765 * The function returns -1 / INVALID_HANDLE_VALUE in the event of an error.
1766 *
1767 * Remarks:
1768 *
1769 ********************************************************************/
1770#ifndef WINDOWSVERSION
1771static int openserial(const char *tty, int blocksz, int baud) {
1772 struct termios termios;
1773
1774 /*** opening the serial port ***/
1775 gps_serial = open(tty, O_RDWR | O_NONBLOCK | O_EXLOCK);
1776 if (gps_serial < 0) {
1777 perror("ERROR: opening serial connection");
1778 return (-1);
1779 }
1780
1781 /*** configuring the serial port ***/
1782 if (tcgetattr(gps_serial, &termios) < 0) {
1783 perror("ERROR: get serial attributes");
1784 return (-1);
1785 }
1786 termios.c_iflag = 0;
1787 termios.c_oflag = 0; /* (ONLRET) */
1788 termios.c_cflag = CS8 | CLOCAL | CREAD;
1789 termios.c_lflag = 0;
1790 {
1791 int cnt;
1792 for (cnt = 0; cnt < NCCS; cnt++)
1793 termios.c_cc[cnt] = -1;
1794 }
1795 termios.c_cc[VMIN] = blocksz;
1796 termios.c_cc[VTIME] = 2;
1797
1798#if (B4800 != 4800)
1799 /* Not every system has speed settings equal to absolute speed value. */
1800 switch (baud) {
1801 case 300:
1802 baud = B300;
1803 break;
1804 case 1200:
1805 baud = B1200;
1806 break;
1807 case 2400:
1808 baud = B2400;
1809 break;
1810 case 4800:
1811 baud = B4800;
1812 break;
1813 case 9600:
1814 baud = B9600;
1815 break;
1816 case 19200:
1817 baud = B19200;
1818 break;
1819 case 38400:
1820 baud = B38400;
1821 break;
1822#ifdef B57600
1823 case 57600:
1824 baud = B57600;
1825 break;
1826#endif
1827#ifdef B115200
1828 case 115200:
1829 baud = B115200;
1830 break;
1831#endif
1832#ifdef B230400
1833 case 230400:
1834 baud = B230400;
1835 break;
1836#endif
1837 default:
1838 fprintf(stderr, "WARNING: Baud settings not useful, using 19200\n");
1839 baud = B19200;
1840 break;
1841 }
1842#endif
1843
1844 if (cfsetispeed(&termios, baud) != 0) {
1845 perror("ERROR: setting serial speed with cfsetispeed");
1846 return (-1);
1847 }
1848 if (cfsetospeed(&termios, baud) != 0) {
1849 perror("ERROR: setting serial speed with cfsetospeed");
1850 return (-1);
1851 }
1852 if (tcsetattr(gps_serial, TCSANOW, &termios) < 0) {
1853 perror("ERROR: setting serial attributes");
1854 return (-1);
1855 }
1856 if (fcntl(gps_serial, F_SETFL, 0) == -1) {
1857 perror("WARNING: setting blocking inputmode failed");
1858 }
1859 return (gps_serial);
1860}
1861#else
1862static HANDLE openserial(const char * tty, int baud) {
1863 char compath[15] = "";
1864
1865 snprintf(compath, sizeof(compath), "\\\\.\\%s", tty);
1866 if((gps_serial = CreateFile(compath, GENERIC_WRITE|GENERIC_READ
1867 , 0, 0, OPEN_EXISTING, 0, 0)) == INVALID_HANDLE_VALUE) {
1868 fprintf(stderr, "ERROR: opening serial connection\n");
1869 return (INVALID_HANDLE_VALUE);
1870 }
1871
1872 DCB dcb;
1873 memset(&dcb, 0, sizeof(dcb));
1874 char str[100];
1875 snprintf(str,sizeof(str),
1876 "baud=%d parity=N data=8 stop=1 xon=off octs=off rts=off",
1877 baud);
1878
1879 COMMTIMEOUTS ct = {1000, 1, 0, 0, 0};
1880
1881 if(!BuildCommDCB(str, &dcb)) {
1882 fprintf(stderr, "ERROR: get serial attributes\n");
1883 return (INVALID_HANDLE_VALUE);
1884 }
1885 else if(!SetCommState(gps_serial, &dcb)) {
1886 fprintf(stderr, "ERROR: set serial attributes\n");
1887 return (INVALID_HANDLE_VALUE);
1888 }
1889 else if(!SetCommTimeouts(gps_serial, &ct)) {
1890 fprintf(stderr, "ERROR: set serial timeouts\n");
1891 return (INVALID_HANDLE_VALUE);
1892 }
1893
1894 return (gps_serial);
1895}
1896#endif
1897
1898/********************************************************************
1899 * usage
1900 *
1901 * Send a usage message to standard error and quit the program.
1902 *
1903 * Parameters:
1904 * None.
1905 *
1906 * Return Value:
1907 * The function does not return a value.
1908 *
1909 * Remarks:
1910 *
1911 *********************************************************************/
1912#ifdef __GNUC__
1913__attribute__ ((noreturn))
1914#endif /* __GNUC__ */
1915void usage(int rc, char *name) {
1916 fprintf(stderr, "Version %s (%s) GPL" COMPILEDATE "\nUsage:\n%s [OPTIONS]\n",
1917 revisionstr, datestr, name);
1918 fprintf(stderr, "PURPOSE\n");
1919 fprintf(stderr,
1920 " The purpose of this program is to pick up a GNSS data stream (Input, Source)\n");
1921 fprintf(stderr, " from either\n\n");
1922 fprintf(stderr, " 1. a Serial port, or\n");
1923 fprintf(stderr, " 2. an IP server, or\n");
1924 fprintf(stderr, " 3. a File, or\n");
1925 fprintf(stderr, " 4. a SISNeT Data Server, or\n");
1926 fprintf(stderr, " 5. a UDP server, or\n");
1927 fprintf(stderr, " 6. an NTRIP Version 1.0 Caster\n");
1928 fprintf(stderr, " 7. an NTRIP Version 2.0 Caster in HTTP mode \n\n");
1929 fprintf(stderr,
1930 " and forward that incoming stream (Output, Destination) to either\n\n");
1931 fprintf(stderr, " 1. an NTRIP Version 2.0 Caster via TCP/IP (Output, Destination), or\n");
1932 fprintf(stderr, " 2. an NTRIP Version 2.0 Caster via RTSP/RTP (Output, Destination), or\n");
1933 fprintf(stderr, " 3. an NTRIP Version 2.0 Caster via plain UDP (Output, Destination), or\n");
1934 fprintf(stderr, " 4. an NTRIP Version 1.0 Caster, or\n");
1935 fprintf(stderr, " 5. an IP server via TCP/IP\n\n\n");
1936 fprintf(stderr, "OPTIONS\n");
1937 fprintf(stderr, " -h|? print this help screen\n\n");
1938 fprintf(stderr, " -E <ProxyHost> Proxy server host name or address, required i.e. when\n");
1939 fprintf(stderr, " running the program in a proxy server protected LAN,\n");
1940 fprintf(stderr, " optional\n");
1941 fprintf(stderr, " -F <ProxyPort> Proxy server IP port, required i.e. when running\n");
1942 fprintf(stderr, " the program in a proxy server protected LAN, optional\n");
1943 fprintf(stderr, " -R <maxDelay> Reconnect mechanism with maximum delay between reconnect\n");
1944 fprintf(stderr, " attemts in seconds, default: no reconnect activated,\n");
1945 fprintf(stderr, " optional\n\n");
1946 fprintf(stderr, " -M <InputMode> Sets the input mode (1 = Serial Port, 2 = IP server,\n");
1947 fprintf(stderr, " 3 = File, 4 = SISNeT Data Server, 5 = UDP server, 6 = NTRIP1 Caster,\n");
1948 fprintf(stderr, " 7 = NTRIP2 Caster in HTTP mode),\n");
1949 fprintf(stderr, " mandatory\n\n");
1950 fprintf(stderr, " <InputMode> = 1 (Serial Port):\n");
1951 fprintf(stderr, " -i <Device> Serial input device, default: %s, mandatory if\n", ttyport);
1952 fprintf(stderr, " <InputMode>=1\n");
1953 fprintf(stderr, " -b <BaudRate> Serial input baud rate, default: 19200 bps, mandatory\n");
1954 fprintf(stderr, " if <InputMode>=1\n");
1955 fprintf(stderr, " -f <InitFile> Name of initialization file to be send to input device,\n");
1956 fprintf(stderr, " optional\n\n");
1957 fprintf(stderr, " <InputMode> = 2|5 (IP port | UDP port):\n");
1958 fprintf(stderr, " -H <ServerHost> Input host name or address, default: 127.0.0.1,\n");
1959 fprintf(stderr, " mandatory if <InputMode> = 2|5\n");
1960 fprintf(stderr, " -P <ServerPort> Input port, default: 1025, mandatory if <InputMode>= 2|5\n");
1961 fprintf(stderr, " -f <ServerFile> Name of initialization file to be send to server,\n");
1962 fprintf(stderr, " optional\n");
1963 fprintf(stderr, " -x <ServerUser> User ID to access incoming stream, optional\n");
1964 fprintf(stderr, " -y <ServerPass> Password, to access incoming stream, optional\n");
1965 fprintf(stderr, " -B Bind to incoming UDP stream, optional for <InputMode> = 5\n\n");
1966 fprintf(stderr, " <InputMode> = 3 (File):\n");
1967 fprintf(stderr, " -s <File> File name to simulate stream by reading data from (log)\n");
1968 fprintf(stderr, " file, default is %s, mandatory for <InputMode> = 3\n\n", filepath);
1969 fprintf(stderr, " <InputMode> = 4 (SISNeT Data Server):\n");
1970 fprintf(stderr, " -H <SisnetHost> SISNeT Data Server name or address,\n");
1971 fprintf(stderr, " default: 131.176.49.142, mandatory if <InputMode> = 4\n");
1972 fprintf(stderr, " -P <SisnetPort> SISNeT Data Server port, default: 7777, mandatory if\n");
1973 fprintf(stderr, " <InputMode> = 4\n");
1974 fprintf(stderr, " -u <SisnetUser> SISNeT Data Server user ID, mandatory if <InputMode> = 4\n");
1975 fprintf(stderr, " -l <SisnetPass> SISNeT Data Server password, mandatory if <InputMode> = 4\n");
1976 fprintf(stderr, " -V <SisnetVers> SISNeT Data Server Version number, options are 2.1, 3.0\n");
1977 fprintf(stderr, " or 3.1, default: 3.1, mandatory if <InputMode> = 4\n\n");
1978 fprintf(stderr, " <InputMode> = 6|7 (NTRIP Version 1.0|2.0 Caster):\n");
1979 fprintf(stderr, " -H <SourceHost> Source caster name or address, default: 127.0.0.1,\n");
1980 fprintf(stderr, " mandatory if <InputMode> = 6|7\n");
1981 fprintf(stderr, " -P <SourcePort> Source caster port, default: 2101, mandatory if\n");
1982 fprintf(stderr, " <InputMode> = 6|7\n");
1983 fprintf(stderr, " -D <SourceMount> Source caster mountpoint for stream input, mandatory if\n");
1984 fprintf(stderr, " <InputMode> = 6|7\n");
1985 fprintf(stderr, " -U <SourceUser> Source caster user Id for input stream access, mandatory\n");
1986 fprintf(stderr, " for protected streams if <InputMode> = 6|7\n");
1987 fprintf(stderr, " -W <SourcePass> Source caster password for input stream access, mandatory\n");
1988 fprintf(stderr, " for protected streams if <InputMode> = 6|7\n\n");
1989 fprintf(stderr, " -O <OutputMode> Sets output mode for communication with destination caster / server\n");
1990 fprintf(stderr, " 1 = http : NTRIP Version 2.0 Caster in TCP/IP mode\n");
1991 fprintf(stderr, " 2 = rtsp : NTRIP Version 2.0 Caster in RTSP/RTP mode\n");
1992 fprintf(stderr, " 3 = ntrip1: NTRIP Version 1.0 Caster\n");
1993 fprintf(stderr, " 4 = udp : NTRIP Version 2.0 Caster in Plain UDP mode\n");
1994 fprintf(stderr, " 5 = tcpip : IP server in TCP/IP mode\n\n\n");
1995 fprintf(stderr, " Defaults to NTRIP1.0, but will change to 2.0 in future versions\n");
1996 fprintf(stderr, " Note that the program automatically falls back from mode rtsp to mode http and\n");
1997 fprintf(stderr, " further to mode ntrip1 if necessary.\n\n");
1998 fprintf(stderr, " -a <DestHost> Destination caster/server name or address, default: 127.0.0.1,\n");
1999 fprintf(stderr, " mandatory\n");
2000 fprintf(stderr, " -p <DestPort> Destination caster/server port, default: 2101,\n");
2001 fprintf(stderr, " mandatory\n");
2002 fprintf(stderr, " -m <DestMount> Destination caster mountpoint for stream upload,\n");
2003 fprintf(stderr, " only for NTRIP destination casters, mandatory\n");
2004 fprintf(stderr, " -n <DestUser> Destination caster user ID for stream upload to mountpoint,\n");
2005 fprintf(stderr, " only for NTRIP Version 2.0 destination casters, mandatory\n");
2006 fprintf(stderr, " -c <DestPass> Destination caster password for stream upload to mountpoint,\n");
2007 fprintf(stderr, " only for NTRIP destination casters, mandatory\n");
2008 fprintf(stderr, " -N <STR-record> Sourcetable STR-record\n");
2009 fprintf(stderr, " optional for NTRIP Version 2.0 in RTSP/RTP and TCP/IP mode\n\n");
2010 exit(rc);
2011} /* usage */
2012
2013/********************************************************************/
2014/* signal handling */
2015/********************************************************************/
2016#ifdef __GNUC__
2017static void handle_sigint(int sig __attribute__((__unused__)))
2018#else /* __GNUC__ */
2019static void handle_sigint(int sig)
2020#endif /* __GNUC__ */
2021{
2022 sigint_received = 1;
2023 fprintf(stderr, "\nWARNING: SIGINT received - ntripserver terminates\n");
2024}
2025
2026#ifndef WINDOWSVERSION
2027#ifdef __GNUC__
2028static void handle_alarm(int sig __attribute__((__unused__)))
2029#else /* __GNUC__ */
2030static void handle_alarm(int sig)
2031#endif /* __GNUC__ */
2032{
2033 sigalarm_received = 1;
2034 fprintf(stderr, "ERROR: more than %d seconds no activity\n", ALARMTIME);
2035}
2036
2037#ifdef __GNUC__
2038static void handle_sigpipe(int sig __attribute__((__unused__)))
2039#else /* __GNUC__ */
2040static void handle_sigpipe(int sig)
2041#endif /* __GNUC__ */
2042{
2043 sigpipe_received = 1;
2044}
2045#endif /* WINDOWSVERSION */
2046
2047static void setup_signal_handler(int sig, void (*handler)(int)) {
2048#if _POSIX_VERSION > 198800L
2049 struct sigaction action;
2050
2051 action.sa_handler = handler;
2052 sigemptyset(&(action.sa_mask));
2053 sigaddset(&(action.sa_mask), sig);
2054 action.sa_flags = 0;
2055 sigaction(sig, &action, 0);
2056#else
2057 signal(sig, handler);
2058#endif
2059 return;
2060} /* setupsignal_handler */
2061
2062/********************************************************************
2063 * base64-encoding *
2064 *******************************************************************/
2065static const char encodingTable[64] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
2066 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
2067 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
2068 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0',
2069 '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };
2070
2071/* does not buffer overrun, but breaks directly after an error */
2072/* returns the number of required bytes */
2073static int encode(char *buf, int size, const char *user, const char *pwd) {
2074 unsigned char inbuf[3];
2075 char *out = buf;
2076 int i, sep = 0, fill = 0, bytes = 0;
2077
2078 while (*user || *pwd) {
2079 i = 0;
2080 while (i < 3 && *user)
2081 inbuf[i++] = *(user++);
2082 if (i < 3 && !sep) {
2083 inbuf[i++] = ':';
2084 ++sep;
2085 }
2086 while (i < 3 && *pwd)
2087 inbuf[i++] = *(pwd++);
2088 while (i < 3) {
2089 inbuf[i++] = 0;
2090 ++fill;
2091 }
2092 if (out - buf < size - 1)
2093 *(out++) = encodingTable[(inbuf[0] & 0xFC) >> 2];
2094 if (out - buf < size - 1)
2095 *(out++) = encodingTable[((inbuf[0] & 0x03) << 4)
2096 | ((inbuf[1] & 0xF0) >> 4)];
2097 if (out - buf < size - 1) {
2098 if (fill == 2)
2099 *(out++) = '=';
2100 else
2101 *(out++) = encodingTable[((inbuf[1] & 0x0F) << 2)
2102 | ((inbuf[2] & 0xC0) >> 6)];
2103 }
2104 if (out - buf < size - 1) {
2105 if (fill >= 1)
2106 *(out++) = '=';
2107 else
2108 *(out++) = encodingTable[inbuf[2] & 0x3F];
2109 }
2110 bytes += 4;
2111 }
2112 if (out - buf < size)
2113 *out = 0;
2114 return bytes;
2115}/* base64 Encoding */
2116
2117/********************************************************************
2118 * send message to caster *
2119 *********************************************************************/
2120static int send_to_caster(char *input, sockettype socket, int input_size) {
2121 int send_error = 1;
2122
2123 if ((send(socket, input, (size_t) input_size, 0)) != input_size) {
2124 fprintf(stderr,
2125 "WARNING: could not send full header to Destination caster\n");
2126 send_error = 0;
2127 }
2128#ifndef NDEBUG
2129 else {
2130 fprintf(stderr, "\nDestination caster request:\n");
2131 fprintf(stderr, "%s\n", input);
2132 }
2133#endif
2134 return send_error;
2135}/* send_to_caster */
2136
2137/********************************************************************
2138 * reconnect *
2139 *********************************************************************/
2140int reconnect(int rec_sec, int rec_sec_max) {
2141 fprintf(stderr, "reconnect in <%d> seconds\n\n", rec_sec);
2142 rec_sec *= 2;
2143 if (rec_sec > rec_sec_max)
2144 rec_sec = rec_sec_max;
2145#ifndef WINDOWSVERSION
2146 sleep(rec_sec);
2147 sigpipe_received = 0;
2148#else
2149 Sleep(rec_sec*1000);
2150#endif
2151 sigalarm_received = 0;
2152 return rec_sec;
2153} /* reconnect */
2154
2155/********************************************************************
2156 * close session *
2157 *********************************************************************/
2158static void close_session(const char *caster_addr, const char *mountpoint,
2159 int session, char *rtsp_ext, int fallback) {
2160 int size_send_buf;
2161 char send_buf[BUFSZ];
2162
2163 if (!fallback) {
2164 if ((gps_socket != INVALID_SOCKET)
2165 && ((inputmode == TCPSOCKET) || (inputmode == UDPSOCKET)
2166 || (inputmode == NTRIP1_IN) || (inputmode == NTRIP2_HTTP_IN)
2167 || (inputmode == SISNET))) {
2168 if (closesocket(gps_socket) == -1) {
2169 perror("ERROR: close input device ");
2170 exit(0);
2171 } else {
2172 gps_socket = -1;
2173#ifndef NDEBUG
2174 fprintf(stderr, "close input device: successful\n");
2175#endif
2176 }
2177 } else if ((gps_serial != INVALID_HANDLE_VALUE) && (inputmode == SERIAL)) {
2178#ifndef WINDOWSVERSION
2179 if (close(gps_serial) == INVALID_HANDLE_VALUE) {
2180 perror("ERROR: close input device ");
2181 exit(0);
2182 }
2183#else
2184 if(!CloseHandle(gps_serial))
2185 {
2186 fprintf(stderr, "ERROR: close input device ");
2187 exit(0);
2188 }
2189#endif
2190 else {
2191 gps_serial = INVALID_HANDLE_VALUE;
2192#ifndef NDEBUG
2193 fprintf(stderr, "close input device: successful\n");
2194#endif
2195 }
2196 } else if ((gps_file != -1) && (inputmode == INFILE)) {
2197 if (close(gps_file) == -1) {
2198 perror("ERROR: close input device ");
2199 exit(0);
2200 } else {
2201 gps_file = -1;
2202#ifndef NDEBUG
2203 fprintf(stderr, "close input device: successful\n");
2204#endif
2205 }
2206 }
2207 }
2208
2209 if (socket_udp != INVALID_SOCKET) {
2210 if (udp_cseq > 2) {
2211 size_send_buf = snprintf(send_buf, sizeof(send_buf),
2212 "TEARDOWN rtsp://%s%s/%s RTSP/1.0\r\n"
2213 "CSeq: %d\r\n"
2214 "Session: %u\r\n"
2215 "\r\n", caster_addr, rtsp_ext, mountpoint, udp_cseq++, session);
2216 if ((size_send_buf >= (int) sizeof(send_buf)) || (size_send_buf < 0)) {
2217 fprintf(stderr, "ERROR: Destination caster request to long\n");
2218 exit(0);
2219 }
2220 send_to_caster(send_buf, socket_tcp, size_send_buf);
2221 strcpy(send_buf, "");
2222 size_send_buf = recv(socket_tcp, send_buf, sizeof(send_buf), 0);
2223 send_buf[size_send_buf] = '\0';
2224#ifndef NDEBUG
2225 fprintf(stderr, "Destination caster response:\n%s", send_buf);
2226#endif
2227 }
2228 if (closesocket(socket_udp) == -1) {
2229 perror("ERROR: close udp socket");
2230 exit(0);
2231 } else {
2232 socket_udp = -1;
2233#ifndef NDEBUG
2234 fprintf(stderr, "close udp socket: successful\n");
2235#endif
2236 }
2237 }
2238
2239 if (socket_tcp != INVALID_SOCKET) {
2240 if (closesocket(socket_tcp) == -1) {
2241 perror("ERROR: close tcp socket");
2242 exit(0);
2243 } else {
2244 socket_tcp = -1;
2245#ifndef NDEBUG
2246 fprintf(stderr, "close tcp socket: successful\n");
2247#endif
2248 }
2249 }
2250} /* close_session */
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