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1 | /* |
2 | * Copyright (c) 1995 Danny Gasparovski. | |
3 | * | |
4 | * Please read the file COPYRIGHT for the | |
5 | * terms and conditions of the copyright. | |
6 | */ | |
7 | ||
8 | #define WANT_SYS_IOCTL_H | |
9 | #include <slirp.h> | |
10 | ||
11 | u_int curtime, time_fasttimo, last_slowtimo, detach_time; | |
12 | u_int detach_wait = 600000; /* 10 minutes */ | |
13 | ||
14 | #if 0 | |
15 | int x_port = -1; | |
16 | int x_display = 0; | |
17 | int x_screen = 0; | |
18 | ||
19 | int | |
20 | show_x(buff, inso) | |
21 | char *buff; | |
22 | struct socket *inso; | |
23 | { | |
24 | if (x_port < 0) { | |
25 | lprint("X Redir: X not being redirected.\r\n"); | |
26 | } else { | |
27 | lprint("X Redir: In sh/bash/zsh/etc. type: DISPLAY=%s:%d.%d; export DISPLAY\r\n", | |
28 | inet_ntoa(our_addr), x_port, x_screen); | |
29 | lprint("X Redir: In csh/tcsh/etc. type: setenv DISPLAY %s:%d.%d\r\n", | |
30 | inet_ntoa(our_addr), x_port, x_screen); | |
31 | if (x_display) | |
32 | lprint("X Redir: Redirecting to display %d\r\n", x_display); | |
33 | } | |
34 | ||
35 | return CFG_OK; | |
36 | } | |
37 | ||
38 | ||
39 | /* | |
40 | * XXX Allow more than one X redirection? | |
41 | */ | |
42 | void | |
43 | redir_x(inaddr, start_port, display, screen) | |
44 | u_int32_t inaddr; | |
45 | int start_port; | |
46 | int display; | |
47 | int screen; | |
48 | { | |
49 | int i; | |
50 | ||
51 | if (x_port >= 0) { | |
52 | lprint("X Redir: X already being redirected.\r\n"); | |
53 | show_x(0, 0); | |
54 | } else { | |
55 | for (i = 6001 + (start_port-1); i <= 6100; i++) { | |
56 | if (solisten(htons(i), inaddr, htons(6000 + display), 0)) { | |
57 | /* Success */ | |
58 | x_port = i - 6000; | |
59 | x_display = display; | |
60 | x_screen = screen; | |
61 | show_x(0, 0); | |
62 | return; | |
63 | } | |
64 | } | |
65 | lprint("X Redir: Error: Couldn't redirect a port for X. Weird.\r\n"); | |
66 | } | |
67 | } | |
68 | #endif | |
69 | ||
70 | #ifndef HAVE_INET_ATON | |
71 | int | |
72 | inet_aton(cp, ia) | |
73 | const char *cp; | |
74 | struct in_addr *ia; | |
75 | { | |
76 | u_int32_t addr = inet_addr(cp); | |
77 | if (addr == 0xffffffff) | |
78 | return 0; | |
79 | ia->s_addr = addr; | |
80 | return 1; | |
81 | } | |
82 | #endif | |
83 | ||
84 | /* | |
85 | * Get our IP address and put it in our_addr | |
86 | */ | |
87 | void | |
88 | getouraddr() | |
89 | { | |
90 | char buff[256]; | |
91 | struct hostent *he; | |
92 | ||
93 | if (gethostname(buff,256) < 0) | |
94 | return; | |
95 | ||
96 | if ((he = gethostbyname(buff)) == NULL) | |
97 | return; | |
98 | ||
99 | our_addr = *(struct in_addr *)he->h_addr; | |
100 | } | |
101 | ||
102 | #if SIZEOF_CHAR_P == 8 | |
103 | ||
104 | struct quehead_32 { | |
105 | u_int32_t qh_link; | |
106 | u_int32_t qh_rlink; | |
107 | }; | |
108 | ||
109 | inline void | |
110 | insque_32(a, b) | |
111 | void *a; | |
112 | void *b; | |
113 | { | |
114 | register struct quehead_32 *element = (struct quehead_32 *) a; | |
115 | register struct quehead_32 *head = (struct quehead_32 *) b; | |
116 | element->qh_link = head->qh_link; | |
117 | head->qh_link = (u_int32_t)element; | |
118 | element->qh_rlink = (u_int32_t)head; | |
119 | ((struct quehead_32 *)(element->qh_link))->qh_rlink | |
120 | = (u_int32_t)element; | |
121 | } | |
122 | ||
123 | inline void | |
124 | remque_32(a) | |
125 | void *a; | |
126 | { | |
127 | register struct quehead_32 *element = (struct quehead_32 *) a; | |
128 | ((struct quehead_32 *)(element->qh_link))->qh_rlink = element->qh_rlink; | |
129 | ((struct quehead_32 *)(element->qh_rlink))->qh_link = element->qh_link; | |
130 | element->qh_rlink = 0; | |
131 | } | |
132 | ||
133 | #endif /* SIZEOF_CHAR_P == 8 */ | |
134 | ||
135 | struct quehead { | |
136 | struct quehead *qh_link; | |
137 | struct quehead *qh_rlink; | |
138 | }; | |
139 | ||
140 | inline void | |
141 | insque(a, b) | |
142 | void *a, *b; | |
143 | { | |
144 | register struct quehead *element = (struct quehead *) a; | |
145 | register struct quehead *head = (struct quehead *) b; | |
146 | element->qh_link = head->qh_link; | |
147 | head->qh_link = (struct quehead *)element; | |
148 | element->qh_rlink = (struct quehead *)head; | |
149 | ((struct quehead *)(element->qh_link))->qh_rlink | |
150 | = (struct quehead *)element; | |
151 | } | |
152 | ||
153 | inline void | |
154 | remque(a) | |
155 | void *a; | |
156 | { | |
157 | register struct quehead *element = (struct quehead *) a; | |
158 | ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink; | |
159 | ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link; | |
160 | element->qh_rlink = NULL; | |
161 | /* element->qh_link = NULL; TCP FIN1 crashes if you do this. Why ? */ | |
162 | } | |
163 | ||
164 | /* #endif */ | |
165 | ||
166 | ||
167 | int | |
168 | add_exec(ex_ptr, do_pty, exec, addr, port) | |
169 | struct ex_list **ex_ptr; | |
170 | int do_pty; | |
171 | char *exec; | |
172 | int addr; | |
173 | int port; | |
174 | { | |
175 | struct ex_list *tmp_ptr; | |
176 | ||
177 | /* First, check if the port is "bound" */ | |
178 | for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) { | |
179 | if (port == tmp_ptr->ex_fport && addr == tmp_ptr->ex_addr) | |
180 | return -1; | |
181 | } | |
182 | ||
183 | tmp_ptr = *ex_ptr; | |
184 | *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list)); | |
185 | (*ex_ptr)->ex_fport = port; | |
186 | (*ex_ptr)->ex_addr = addr; | |
187 | (*ex_ptr)->ex_pty = do_pty; | |
188 | (*ex_ptr)->ex_exec = strdup(exec); | |
189 | (*ex_ptr)->ex_next = tmp_ptr; | |
190 | return 0; | |
191 | } | |
192 | ||
193 | #ifndef HAVE_STRERROR | |
194 | ||
195 | /* | |
196 | * For systems with no strerror | |
197 | */ | |
198 | ||
199 | extern int sys_nerr; | |
200 | extern char *sys_errlist[]; | |
201 | ||
202 | char * | |
203 | strerror(error) | |
204 | int error; | |
205 | { | |
206 | if (error < sys_nerr) | |
207 | return sys_errlist[error]; | |
208 | else | |
209 | return "Unknown error."; | |
210 | } | |
211 | ||
212 | #endif | |
213 | ||
214 | ||
215 | #if 0 | |
216 | int | |
217 | openpty(amaster, aslave) | |
218 | int *amaster, *aslave; | |
219 | { | |
220 | register int master, slave; | |
221 | ||
222 | #ifdef HAVE_GRANTPT | |
223 | char *ptr; | |
224 | ||
225 | if ((master = open("/dev/ptmx", O_RDWR)) < 0 || | |
226 | grantpt(master) < 0 || | |
227 | unlockpt(master) < 0 || | |
228 | (ptr = ptsname(master)) == NULL) { | |
229 | close(master); | |
230 | return -1; | |
231 | } | |
232 | ||
233 | if ((slave = open(ptr, O_RDWR)) < 0 || | |
234 | ioctl(slave, I_PUSH, "ptem") < 0 || | |
235 | ioctl(slave, I_PUSH, "ldterm") < 0 || | |
236 | ioctl(slave, I_PUSH, "ttcompat") < 0) { | |
237 | close(master); | |
238 | close(slave); | |
239 | return -1; | |
240 | } | |
241 | ||
242 | *amaster = master; | |
243 | *aslave = slave; | |
244 | return 0; | |
245 | ||
246 | #else | |
247 | ||
248 | static char line[] = "/dev/ptyXX"; | |
249 | register const char *cp1, *cp2; | |
250 | ||
251 | for (cp1 = "pqrsPQRS"; *cp1; cp1++) { | |
252 | line[8] = *cp1; | |
253 | for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) { | |
254 | line[9] = *cp2; | |
255 | if ((master = open(line, O_RDWR, 0)) == -1) { | |
256 | if (errno == ENOENT) | |
257 | return (-1); /* out of ptys */ | |
258 | } else { | |
259 | line[5] = 't'; | |
260 | /* These will fail */ | |
261 | (void) chown(line, getuid(), 0); | |
262 | (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP); | |
263 | #ifdef HAVE_REVOKE | |
264 | (void) revoke(line); | |
265 | #endif | |
266 | if ((slave = open(line, O_RDWR, 0)) != -1) { | |
267 | *amaster = master; | |
268 | *aslave = slave; | |
269 | return 0; | |
270 | } | |
271 | (void) close(master); | |
272 | line[5] = 'p'; | |
273 | } | |
274 | } | |
275 | } | |
276 | errno = ENOENT; /* out of ptys */ | |
277 | return (-1); | |
278 | #endif | |
279 | } | |
280 | ||
281 | /* | |
282 | * XXX This is ugly | |
283 | * We create and bind a socket, then fork off to another | |
284 | * process, which connects to this socket, after which we | |
285 | * exec the wanted program. If something (strange) happens, | |
286 | * the accept() call could block us forever. | |
287 | * | |
288 | * do_pty = 0 Fork/exec inetd style | |
289 | * do_pty = 1 Fork/exec using slirp.telnetd | |
290 | * do_ptr = 2 Fork/exec using pty | |
291 | */ | |
292 | int | |
293 | fork_exec(so, ex, do_pty) | |
294 | struct socket *so; | |
295 | char *ex; | |
296 | int do_pty; | |
297 | { | |
298 | int s; | |
299 | struct sockaddr_in addr; | |
300 | int addrlen = sizeof(addr); | |
301 | int opt; | |
302 | int master; | |
303 | char *argv[256]; | |
304 | char buff[256]; | |
305 | /* don't want to clobber the original */ | |
306 | char *bptr; | |
307 | char *curarg; | |
308 | int c, i; | |
309 | ||
310 | DEBUG_CALL("fork_exec"); | |
311 | DEBUG_ARG("so = %lx", (long)so); | |
312 | DEBUG_ARG("ex = %lx", (long)ex); | |
313 | DEBUG_ARG("do_pty = %lx", (long)do_pty); | |
314 | ||
315 | if (do_pty == 2) { | |
316 | if (openpty(&master, &s) == -1) { | |
317 | lprint("Error: openpty failed: %s\n", strerror(errno)); | |
318 | return 0; | |
319 | } | |
320 | } else { | |
321 | addr.sin_family = AF_INET; | |
322 | addr.sin_port = 0; | |
323 | addr.sin_addr.s_addr = INADDR_ANY; | |
324 | ||
325 | if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 || | |
326 | bind(s, (struct sockaddr *)&addr, addrlen) < 0 || | |
327 | listen(s, 1) < 0) { | |
328 | lprint("Error: inet socket: %s\n", strerror(errno)); | |
379ff53d | 329 | closesocket(s); |
f0cbd3ec FB |
330 | |
331 | return 0; | |
332 | } | |
333 | } | |
334 | ||
335 | switch(fork()) { | |
336 | case -1: | |
337 | lprint("Error: fork failed: %s\n", strerror(errno)); | |
338 | close(s); | |
339 | if (do_pty == 2) | |
340 | close(master); | |
341 | return 0; | |
342 | ||
343 | case 0: | |
344 | /* Set the DISPLAY */ | |
345 | if (do_pty == 2) { | |
346 | (void) close(master); | |
347 | #ifdef TIOCSCTTY /* XXXXX */ | |
348 | (void) setsid(); | |
349 | ioctl(s, TIOCSCTTY, (char *)NULL); | |
350 | #endif | |
351 | } else { | |
352 | getsockname(s, (struct sockaddr *)&addr, &addrlen); | |
353 | close(s); | |
354 | /* | |
355 | * Connect to the socket | |
356 | * XXX If any of these fail, we're in trouble! | |
357 | */ | |
358 | s = socket(AF_INET, SOCK_STREAM, 0); | |
359 | addr.sin_addr = loopback_addr; | |
360 | connect(s, (struct sockaddr *)&addr, addrlen); | |
361 | } | |
362 | ||
363 | if (x_port >= 0) { | |
364 | #ifdef HAVE_SETENV | |
365 | sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen); | |
366 | setenv("DISPLAY", buff, 1); | |
367 | #else | |
368 | sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen); | |
369 | putenv(buff); | |
370 | #endif | |
371 | } | |
372 | ||
373 | dup2(s, 0); | |
374 | dup2(s, 1); | |
375 | dup2(s, 2); | |
376 | for (s = 3; s <= 255; s++) | |
377 | close(s); | |
378 | ||
379 | i = 0; | |
380 | bptr = strdup(ex); /* No need to free() this */ | |
381 | if (do_pty == 1) { | |
382 | /* Setup "slirp.telnetd -x" */ | |
383 | argv[i++] = "slirp.telnetd"; | |
384 | argv[i++] = "-x"; | |
385 | argv[i++] = bptr; | |
386 | } else | |
387 | do { | |
388 | /* Change the string into argv[] */ | |
389 | curarg = bptr; | |
390 | while (*bptr != ' ' && *bptr != (char)0) | |
391 | bptr++; | |
392 | c = *bptr; | |
393 | *bptr++ = (char)0; | |
394 | argv[i++] = strdup(curarg); | |
395 | } while (c); | |
396 | ||
397 | argv[i] = 0; | |
398 | execvp(argv[0], argv); | |
399 | ||
400 | /* Ooops, failed, let's tell the user why */ | |
401 | { | |
402 | char buff[256]; | |
403 | ||
404 | sprintf(buff, "Error: execvp of %s failed: %s\n", | |
405 | argv[0], strerror(errno)); | |
406 | write(2, buff, strlen(buff)+1); | |
407 | } | |
408 | close(0); close(1); close(2); /* XXX */ | |
409 | exit(1); | |
410 | ||
411 | default: | |
412 | if (do_pty == 2) { | |
413 | close(s); | |
414 | so->s = master; | |
415 | } else { | |
416 | /* | |
417 | * XXX this could block us... | |
418 | * XXX Should set a timer here, and if accept() doesn't | |
419 | * return after X seconds, declare it a failure | |
420 | * The only reason this will block forever is if socket() | |
421 | * of connect() fail in the child process | |
422 | */ | |
423 | so->s = accept(s, (struct sockaddr *)&addr, &addrlen); | |
379ff53d | 424 | closesocket(s); |
f0cbd3ec FB |
425 | opt = 1; |
426 | setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)); | |
427 | opt = 1; | |
428 | setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); | |
429 | } | |
430 | fd_nonblock(so->s); | |
431 | ||
432 | /* Append the telnet options now */ | |
433 | if (so->so_m != 0 && do_pty == 1) { | |
434 | sbappend(so, so->so_m); | |
435 | so->so_m = 0; | |
436 | } | |
437 | ||
438 | return 1; | |
439 | } | |
440 | } | |
441 | #endif | |
442 | ||
443 | #ifndef HAVE_STRDUP | |
444 | char * | |
445 | strdup(str) | |
446 | const char *str; | |
447 | { | |
448 | char *bptr; | |
449 | ||
450 | bptr = (char *)malloc(strlen(str)+1); | |
451 | strcpy(bptr, str); | |
452 | ||
453 | return bptr; | |
454 | } | |
455 | #endif | |
456 | ||
457 | #if 0 | |
458 | void | |
459 | snooze_hup(num) | |
460 | int num; | |
461 | { | |
462 | int s, ret; | |
463 | #ifndef NO_UNIX_SOCKETS | |
464 | struct sockaddr_un sock_un; | |
465 | #endif | |
466 | struct sockaddr_in sock_in; | |
467 | char buff[256]; | |
468 | ||
469 | ret = -1; | |
470 | if (slirp_socket_passwd) { | |
471 | s = socket(AF_INET, SOCK_STREAM, 0); | |
472 | if (s < 0) | |
473 | slirp_exit(1); | |
474 | sock_in.sin_family = AF_INET; | |
475 | sock_in.sin_addr.s_addr = slirp_socket_addr; | |
476 | sock_in.sin_port = htons(slirp_socket_port); | |
477 | if (connect(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) != 0) | |
478 | slirp_exit(1); /* just exit...*/ | |
479 | sprintf(buff, "kill %s:%d", slirp_socket_passwd, slirp_socket_unit); | |
480 | write(s, buff, strlen(buff)+1); | |
481 | } | |
482 | #ifndef NO_UNIX_SOCKETS | |
483 | else { | |
484 | s = socket(AF_UNIX, SOCK_STREAM, 0); | |
485 | if (s < 0) | |
486 | slirp_exit(1); | |
487 | sock_un.sun_family = AF_UNIX; | |
488 | strcpy(sock_un.sun_path, socket_path); | |
489 | if (connect(s, (struct sockaddr *)&sock_un, | |
490 | sizeof(sock_un.sun_family) + sizeof(sock_un.sun_path)) != 0) | |
491 | slirp_exit(1); | |
492 | sprintf(buff, "kill none:%d", slirp_socket_unit); | |
493 | write(s, buff, strlen(buff)+1); | |
494 | } | |
495 | #endif | |
496 | slirp_exit(0); | |
497 | } | |
498 | ||
499 | ||
500 | void | |
501 | snooze() | |
502 | { | |
503 | sigset_t s; | |
504 | int i; | |
505 | ||
506 | /* Don't need our data anymore */ | |
507 | /* XXX This makes SunOS barf */ | |
508 | /* brk(0); */ | |
509 | ||
510 | /* Close all fd's */ | |
511 | for (i = 255; i >= 0; i--) | |
512 | close(i); | |
513 | ||
514 | signal(SIGQUIT, slirp_exit); | |
515 | signal(SIGHUP, snooze_hup); | |
516 | sigemptyset(&s); | |
517 | ||
518 | /* Wait for any signal */ | |
519 | sigsuspend(&s); | |
520 | ||
521 | /* Just in case ... */ | |
522 | exit(255); | |
523 | } | |
524 | ||
525 | void | |
526 | relay(s) | |
527 | int s; | |
528 | { | |
529 | char buf[8192]; | |
530 | int n; | |
531 | fd_set readfds; | |
532 | struct ttys *ttyp; | |
533 | ||
534 | /* Don't need our data anymore */ | |
535 | /* XXX This makes SunOS barf */ | |
536 | /* brk(0); */ | |
537 | ||
538 | signal(SIGQUIT, slirp_exit); | |
539 | signal(SIGHUP, slirp_exit); | |
540 | signal(SIGINT, slirp_exit); | |
541 | signal(SIGTERM, slirp_exit); | |
542 | ||
543 | /* Fudge to get term_raw and term_restore to work */ | |
544 | if (NULL == (ttyp = tty_attach (0, slirp_tty))) { | |
545 | lprint ("Error: tty_attach failed in misc.c:relay()\r\n"); | |
546 | slirp_exit (1); | |
547 | } | |
548 | ttyp->fd = 0; | |
549 | ttyp->flags |= TTY_CTTY; | |
550 | term_raw(ttyp); | |
551 | ||
552 | while (1) { | |
553 | FD_ZERO(&readfds); | |
554 | ||
555 | FD_SET(0, &readfds); | |
556 | FD_SET(s, &readfds); | |
557 | ||
558 | n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0); | |
559 | ||
560 | if (n <= 0) | |
561 | slirp_exit(0); | |
562 | ||
563 | if (FD_ISSET(0, &readfds)) { | |
564 | n = read(0, buf, 8192); | |
565 | if (n <= 0) | |
566 | slirp_exit(0); | |
567 | n = writen(s, buf, n); | |
568 | if (n <= 0) | |
569 | slirp_exit(0); | |
570 | } | |
571 | ||
572 | if (FD_ISSET(s, &readfds)) { | |
573 | n = read(s, buf, 8192); | |
574 | if (n <= 0) | |
575 | slirp_exit(0); | |
576 | n = writen(0, buf, n); | |
577 | if (n <= 0) | |
578 | slirp_exit(0); | |
579 | } | |
580 | } | |
581 | ||
582 | /* Just in case.... */ | |
583 | exit(1); | |
584 | } | |
585 | #endif | |
586 | ||
587 | int (*lprint_print) _P((void *, const char *, va_list)); | |
588 | char *lprint_ptr, *lprint_ptr2, **lprint_arg; | |
589 | ||
590 | void | |
591 | #ifdef __STDC__ | |
592 | lprint(const char *format, ...) | |
593 | #else | |
594 | lprint(va_alist) va_dcl | |
595 | #endif | |
596 | { | |
597 | va_list args; | |
598 | ||
599 | #ifdef __STDC__ | |
600 | va_start(args, format); | |
601 | #else | |
602 | char *format; | |
603 | va_start(args); | |
604 | format = va_arg(args, char *); | |
605 | #endif | |
606 | #if 0 | |
607 | /* If we're printing to an sbuf, make sure there's enough room */ | |
608 | /* XXX +100? */ | |
609 | if (lprint_sb) { | |
610 | if ((lprint_ptr - lprint_sb->sb_wptr) >= | |
611 | (lprint_sb->sb_datalen - (strlen(format) + 100))) { | |
612 | int deltaw = lprint_sb->sb_wptr - lprint_sb->sb_data; | |
613 | int deltar = lprint_sb->sb_rptr - lprint_sb->sb_data; | |
614 | int deltap = lprint_ptr - lprint_sb->sb_data; | |
615 | ||
616 | lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data, | |
617 | lprint_sb->sb_datalen + TCP_SNDSPACE); | |
618 | ||
619 | /* Adjust all values */ | |
620 | lprint_sb->sb_wptr = lprint_sb->sb_data + deltaw; | |
621 | lprint_sb->sb_rptr = lprint_sb->sb_data + deltar; | |
622 | lprint_ptr = lprint_sb->sb_data + deltap; | |
623 | ||
624 | lprint_sb->sb_datalen += TCP_SNDSPACE; | |
625 | } | |
626 | } | |
627 | #endif | |
628 | if (lprint_print) | |
629 | lprint_ptr += (*lprint_print)(*lprint_arg, format, args); | |
630 | ||
631 | /* Check if they want output to be logged to file as well */ | |
632 | if (lfd) { | |
633 | /* | |
634 | * Remove \r's | |
635 | * otherwise you'll get ^M all over the file | |
636 | */ | |
637 | int len = strlen(format); | |
638 | char *bptr1, *bptr2; | |
639 | ||
640 | bptr1 = bptr2 = strdup(format); | |
641 | ||
642 | while (len--) { | |
643 | if (*bptr1 == '\r') | |
644 | memcpy(bptr1, bptr1+1, len+1); | |
645 | else | |
646 | bptr1++; | |
647 | } | |
648 | vfprintf(lfd, bptr2, args); | |
649 | free(bptr2); | |
650 | } | |
651 | va_end(args); | |
652 | } | |
653 | ||
654 | void | |
655 | add_emu(buff) | |
656 | char *buff; | |
657 | { | |
658 | u_int lport, fport; | |
659 | u_int8_t tos = 0, emu = 0; | |
660 | char buff1[256], buff2[256], buff4[128]; | |
661 | char *buff3 = buff4; | |
662 | struct emu_t *emup; | |
663 | struct socket *so; | |
664 | ||
665 | if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) { | |
666 | lprint("Error: Bad arguments\r\n"); | |
667 | return; | |
668 | } | |
669 | ||
670 | if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) { | |
671 | lport = 0; | |
672 | if (sscanf(buff1, "%d", &fport) != 1) { | |
673 | lprint("Error: Bad first argument\r\n"); | |
674 | return; | |
675 | } | |
676 | } | |
677 | ||
678 | if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) { | |
679 | buff3 = 0; | |
680 | if (sscanf(buff2, "%256s", buff1) != 1) { | |
681 | lprint("Error: Bad second argument\r\n"); | |
682 | return; | |
683 | } | |
684 | } | |
685 | ||
686 | if (buff3) { | |
687 | if (strcmp(buff3, "lowdelay") == 0) | |
688 | tos = IPTOS_LOWDELAY; | |
689 | else if (strcmp(buff3, "throughput") == 0) | |
690 | tos = IPTOS_THROUGHPUT; | |
691 | else { | |
692 | lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n"); | |
693 | return; | |
694 | } | |
695 | } | |
696 | ||
697 | if (strcmp(buff1, "ftp") == 0) | |
698 | emu = EMU_FTP; | |
699 | else if (strcmp(buff1, "irc") == 0) | |
700 | emu = EMU_IRC; | |
701 | else if (strcmp(buff1, "none") == 0) | |
702 | emu = EMU_NONE; /* ie: no emulation */ | |
703 | else { | |
704 | lprint("Error: Unknown service\r\n"); | |
705 | return; | |
706 | } | |
707 | ||
708 | /* First, check that it isn't already emulated */ | |
709 | for (emup = tcpemu; emup; emup = emup->next) { | |
710 | if (emup->lport == lport && emup->fport == fport) { | |
711 | lprint("Error: port already emulated\r\n"); | |
712 | return; | |
713 | } | |
714 | } | |
715 | ||
716 | /* link it */ | |
717 | emup = (struct emu_t *)malloc(sizeof (struct emu_t)); | |
718 | emup->lport = (u_int16_t)lport; | |
719 | emup->fport = (u_int16_t)fport; | |
720 | emup->tos = tos; | |
721 | emup->emu = emu; | |
722 | emup->next = tcpemu; | |
723 | tcpemu = emup; | |
724 | ||
725 | /* And finally, mark all current sessions, if any, as being emulated */ | |
726 | for (so = tcb.so_next; so != &tcb; so = so->so_next) { | |
727 | if ((lport && lport == ntohs(so->so_lport)) || | |
728 | (fport && fport == ntohs(so->so_fport))) { | |
729 | if (emu) | |
730 | so->so_emu = emu; | |
731 | if (tos) | |
732 | so->so_iptos = tos; | |
733 | } | |
734 | } | |
735 | ||
736 | lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport); | |
737 | } | |
738 | ||
739 | #ifdef BAD_SPRINTF | |
740 | ||
741 | #undef vsprintf | |
742 | #undef sprintf | |
743 | ||
744 | /* | |
745 | * Some BSD-derived systems have a sprintf which returns char * | |
746 | */ | |
747 | ||
748 | int | |
749 | vsprintf_len(string, format, args) | |
750 | char *string; | |
751 | const char *format; | |
752 | va_list args; | |
753 | { | |
754 | vsprintf(string, format, args); | |
755 | return strlen(string); | |
756 | } | |
757 | ||
758 | int | |
759 | #ifdef __STDC__ | |
760 | sprintf_len(char *string, const char *format, ...) | |
761 | #else | |
762 | sprintf_len(va_alist) va_dcl | |
763 | #endif | |
764 | { | |
765 | va_list args; | |
766 | #ifdef __STDC__ | |
767 | va_start(args, format); | |
768 | #else | |
769 | char *string; | |
770 | char *format; | |
771 | va_start(args); | |
772 | string = va_arg(args, char *); | |
773 | format = va_arg(args, char *); | |
774 | #endif | |
775 | vsprintf(string, format, args); | |
776 | return strlen(string); | |
777 | } | |
778 | ||
779 | #endif | |
780 | ||
781 | void | |
782 | u_sleep(usec) | |
783 | int usec; | |
784 | { | |
785 | struct timeval t; | |
786 | fd_set fdset; | |
787 | ||
788 | FD_ZERO(&fdset); | |
789 | ||
790 | t.tv_sec = 0; | |
791 | t.tv_usec = usec * 1000; | |
792 | ||
793 | select(0, &fdset, &fdset, &fdset, &t); | |
794 | } | |
795 | ||
796 | /* | |
797 | * Set fd blocking and non-blocking | |
798 | */ | |
799 | ||
800 | void | |
801 | fd_nonblock(fd) | |
802 | int fd; | |
803 | { | |
804 | #ifdef FIONBIO | |
805 | int opt = 1; | |
806 | ||
379ff53d | 807 | ioctlsocket(fd, FIONBIO, &opt); |
f0cbd3ec FB |
808 | #else |
809 | int opt; | |
810 | ||
811 | opt = fcntl(fd, F_GETFL, 0); | |
812 | opt |= O_NONBLOCK; | |
813 | fcntl(fd, F_SETFL, opt); | |
814 | #endif | |
815 | } | |
816 | ||
817 | void | |
818 | fd_block(fd) | |
819 | int fd; | |
820 | { | |
821 | #ifdef FIONBIO | |
822 | int opt = 0; | |
823 | ||
379ff53d | 824 | ioctlsocket(fd, FIONBIO, &opt); |
f0cbd3ec FB |
825 | #else |
826 | int opt; | |
827 | ||
828 | opt = fcntl(fd, F_GETFL, 0); | |
829 | opt &= ~O_NONBLOCK; | |
830 | fcntl(fd, F_SETFL, opt); | |
831 | #endif | |
832 | } | |
833 | ||
834 | ||
835 | #if 0 | |
836 | /* | |
837 | * invoke RSH | |
838 | */ | |
839 | int | |
840 | rsh_exec(so,ns, user, host, args) | |
841 | struct socket *so; | |
842 | struct socket *ns; | |
843 | char *user; | |
844 | char *host; | |
845 | char *args; | |
846 | { | |
847 | int fd[2]; | |
848 | int fd0[2]; | |
849 | int s; | |
850 | char buff[256]; | |
851 | ||
852 | DEBUG_CALL("rsh_exec"); | |
853 | DEBUG_ARG("so = %lx", (long)so); | |
854 | ||
855 | if (pipe(fd)<0) { | |
856 | lprint("Error: pipe failed: %s\n", strerror(errno)); | |
857 | return 0; | |
858 | } | |
859 | /* #ifdef HAVE_SOCKETPAIR */ | |
860 | #if 1 | |
861 | if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) { | |
862 | close(fd[0]); | |
863 | close(fd[1]); | |
864 | lprint("Error: openpty failed: %s\n", strerror(errno)); | |
865 | return 0; | |
866 | } | |
867 | #else | |
868 | if (openpty(&fd0[0], &fd0[1]) == -1) { | |
869 | close(fd[0]); | |
870 | close(fd[1]); | |
871 | lprint("Error: openpty failed: %s\n", strerror(errno)); | |
872 | return 0; | |
873 | } | |
874 | #endif | |
875 | ||
876 | switch(fork()) { | |
877 | case -1: | |
878 | lprint("Error: fork failed: %s\n", strerror(errno)); | |
879 | close(fd[0]); | |
880 | close(fd[1]); | |
881 | close(fd0[0]); | |
882 | close(fd0[1]); | |
883 | return 0; | |
884 | ||
885 | case 0: | |
886 | close(fd[0]); | |
887 | close(fd0[0]); | |
888 | ||
889 | /* Set the DISPLAY */ | |
890 | if (x_port >= 0) { | |
891 | #ifdef HAVE_SETENV | |
892 | sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen); | |
893 | setenv("DISPLAY", buff, 1); | |
894 | #else | |
895 | sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen); | |
896 | putenv(buff); | |
897 | #endif | |
898 | } | |
899 | ||
900 | dup2(fd0[1], 0); | |
901 | dup2(fd0[1], 1); | |
902 | dup2(fd[1], 2); | |
903 | for (s = 3; s <= 255; s++) | |
904 | close(s); | |
905 | ||
906 | execlp("rsh","rsh","-l", user, host, args, NULL); | |
907 | ||
908 | /* Ooops, failed, let's tell the user why */ | |
909 | ||
910 | sprintf(buff, "Error: execlp of %s failed: %s\n", | |
911 | "rsh", strerror(errno)); | |
912 | write(2, buff, strlen(buff)+1); | |
913 | close(0); close(1); close(2); /* XXX */ | |
914 | exit(1); | |
915 | ||
916 | default: | |
917 | close(fd[1]); | |
918 | close(fd0[1]); | |
919 | ns->s=fd[0]; | |
920 | so->s=fd0[0]; | |
921 | ||
922 | return 1; | |
923 | } | |
924 | } | |
925 | #endif |