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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 | #include <slirp.h> | |
9 | ||
10 | u_int curtime, time_fasttimo, last_slowtimo; | |
11 | ||
12 | #if 0 | |
13 | int x_port = -1; | |
14 | int x_display = 0; | |
15 | int x_screen = 0; | |
16 | ||
17 | int | |
18 | show_x(buff, inso) | |
19 | char *buff; | |
20 | struct socket *inso; | |
21 | { | |
22 | if (x_port < 0) { | |
23 | lprint("X Redir: X not being redirected.\r\n"); | |
24 | } else { | |
25 | lprint("X Redir: In sh/bash/zsh/etc. type: DISPLAY=%s:%d.%d; export DISPLAY\r\n", | |
26 | inet_ntoa(our_addr), x_port, x_screen); | |
27 | lprint("X Redir: In csh/tcsh/etc. type: setenv DISPLAY %s:%d.%d\r\n", | |
28 | inet_ntoa(our_addr), x_port, x_screen); | |
29 | if (x_display) | |
30 | lprint("X Redir: Redirecting to display %d\r\n", x_display); | |
31 | } | |
32 | ||
33 | return CFG_OK; | |
34 | } | |
35 | ||
36 | ||
37 | /* | |
38 | * XXX Allow more than one X redirection? | |
39 | */ | |
40 | void | |
41 | redir_x(inaddr, start_port, display, screen) | |
42 | u_int32_t inaddr; | |
43 | int start_port; | |
44 | int display; | |
45 | int screen; | |
46 | { | |
47 | int i; | |
48 | ||
49 | if (x_port >= 0) { | |
50 | lprint("X Redir: X already being redirected.\r\n"); | |
51 | show_x(0, 0); | |
52 | } else { | |
53 | for (i = 6001 + (start_port-1); i <= 6100; i++) { | |
54 | if (solisten(htons(i), inaddr, htons(6000 + display), 0)) { | |
55 | /* Success */ | |
56 | x_port = i - 6000; | |
57 | x_display = display; | |
58 | x_screen = screen; | |
59 | show_x(0, 0); | |
60 | return; | |
61 | } | |
62 | } | |
63 | lprint("X Redir: Error: Couldn't redirect a port for X. Weird.\r\n"); | |
64 | } | |
65 | } | |
66 | #endif | |
67 | ||
68 | /* | |
69 | * Get our IP address and put it in our_addr | |
70 | */ | |
71 | void | |
72 | getouraddr(void) | |
73 | { | |
74 | char buff[256]; | |
75 | struct hostent *he = NULL; | |
76 | ||
77 | if (gethostname(buff,256) == 0) | |
78 | he = gethostbyname(buff); | |
79 | if (he) | |
80 | our_addr = *(struct in_addr *)he->h_addr; | |
81 | if (our_addr.s_addr == 0) | |
82 | our_addr.s_addr = loopback_addr.s_addr; | |
83 | } | |
84 | ||
85 | struct quehead { | |
86 | struct quehead *qh_link; | |
87 | struct quehead *qh_rlink; | |
88 | }; | |
89 | ||
90 | inline void | |
91 | insque(void *a, void *b) | |
92 | { | |
93 | register struct quehead *element = (struct quehead *) a; | |
94 | register struct quehead *head = (struct quehead *) b; | |
95 | element->qh_link = head->qh_link; | |
96 | head->qh_link = (struct quehead *)element; | |
97 | element->qh_rlink = (struct quehead *)head; | |
98 | ((struct quehead *)(element->qh_link))->qh_rlink | |
99 | = (struct quehead *)element; | |
100 | } | |
101 | ||
102 | inline void | |
103 | remque(void *a) | |
104 | { | |
105 | register struct quehead *element = (struct quehead *) a; | |
106 | ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink; | |
107 | ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link; | |
108 | element->qh_rlink = NULL; | |
109 | /* element->qh_link = NULL; TCP FIN1 crashes if you do this. Why ? */ | |
110 | } | |
111 | ||
112 | /* #endif */ | |
113 | ||
114 | ||
115 | int | |
116 | add_exec(struct ex_list **ex_ptr, int do_pty, char *exec, int addr, int port) | |
117 | { | |
118 | struct ex_list *tmp_ptr; | |
119 | ||
120 | /* First, check if the port is "bound" */ | |
121 | for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) { | |
122 | if (port == tmp_ptr->ex_fport && addr == tmp_ptr->ex_addr) | |
123 | return -1; | |
124 | } | |
125 | ||
126 | tmp_ptr = *ex_ptr; | |
127 | *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list)); | |
128 | (*ex_ptr)->ex_fport = port; | |
129 | (*ex_ptr)->ex_addr = addr; | |
130 | (*ex_ptr)->ex_pty = do_pty; | |
131 | (*ex_ptr)->ex_exec = (do_pty == 3) ? exec : strdup(exec); | |
132 | (*ex_ptr)->ex_next = tmp_ptr; | |
133 | return 0; | |
134 | } | |
135 | ||
136 | #ifndef HAVE_STRERROR | |
137 | ||
138 | /* | |
139 | * For systems with no strerror | |
140 | */ | |
141 | ||
142 | extern int sys_nerr; | |
143 | extern char *sys_errlist[]; | |
144 | ||
145 | char * | |
146 | strerror(error) | |
147 | int error; | |
148 | { | |
149 | if (error < sys_nerr) | |
150 | return sys_errlist[error]; | |
151 | else | |
152 | return "Unknown error."; | |
153 | } | |
154 | ||
155 | #endif | |
156 | ||
157 | ||
158 | #ifdef _WIN32 | |
159 | ||
160 | int | |
161 | fork_exec(struct socket *so, const char *ex, int do_pty) | |
162 | { | |
163 | /* not implemented */ | |
164 | return 0; | |
165 | } | |
166 | ||
167 | #else | |
168 | ||
169 | #ifndef CONFIG_QEMU | |
170 | int | |
171 | slirp_openpty(amaster, aslave) | |
172 | int *amaster, *aslave; | |
173 | { | |
174 | register int master, slave; | |
175 | ||
176 | #ifdef HAVE_GRANTPT | |
177 | char *ptr; | |
178 | ||
179 | if ((master = open("/dev/ptmx", O_RDWR)) < 0 || | |
180 | grantpt(master) < 0 || | |
181 | unlockpt(master) < 0 || | |
182 | (ptr = ptsname(master)) == NULL) { | |
183 | close(master); | |
184 | return -1; | |
185 | } | |
186 | ||
187 | if ((slave = open(ptr, O_RDWR)) < 0 || | |
188 | ioctl(slave, I_PUSH, "ptem") < 0 || | |
189 | ioctl(slave, I_PUSH, "ldterm") < 0 || | |
190 | ioctl(slave, I_PUSH, "ttcompat") < 0) { | |
191 | close(master); | |
192 | close(slave); | |
193 | return -1; | |
194 | } | |
195 | ||
196 | *amaster = master; | |
197 | *aslave = slave; | |
198 | return 0; | |
199 | ||
200 | #else | |
201 | ||
202 | static char line[] = "/dev/ptyXX"; | |
203 | register const char *cp1, *cp2; | |
204 | ||
205 | for (cp1 = "pqrsPQRS"; *cp1; cp1++) { | |
206 | line[8] = *cp1; | |
207 | for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) { | |
208 | line[9] = *cp2; | |
209 | if ((master = open(line, O_RDWR, 0)) == -1) { | |
210 | if (errno == ENOENT) | |
211 | return (-1); /* out of ptys */ | |
212 | } else { | |
213 | line[5] = 't'; | |
214 | /* These will fail */ | |
215 | (void) chown(line, getuid(), 0); | |
216 | (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP); | |
217 | #ifdef HAVE_REVOKE | |
218 | (void) revoke(line); | |
219 | #endif | |
220 | if ((slave = open(line, O_RDWR, 0)) != -1) { | |
221 | *amaster = master; | |
222 | *aslave = slave; | |
223 | return 0; | |
224 | } | |
225 | (void) close(master); | |
226 | line[5] = 'p'; | |
227 | } | |
228 | } | |
229 | } | |
230 | errno = ENOENT; /* out of ptys */ | |
231 | return (-1); | |
232 | #endif | |
233 | } | |
234 | #endif | |
235 | ||
236 | /* | |
237 | * XXX This is ugly | |
238 | * We create and bind a socket, then fork off to another | |
239 | * process, which connects to this socket, after which we | |
240 | * exec the wanted program. If something (strange) happens, | |
241 | * the accept() call could block us forever. | |
242 | * | |
243 | * do_pty = 0 Fork/exec inetd style | |
244 | * do_pty = 1 Fork/exec using slirp.telnetd | |
245 | * do_ptr = 2 Fork/exec using pty | |
246 | */ | |
247 | int | |
248 | fork_exec(struct socket *so, const char *ex, int do_pty) | |
249 | { | |
250 | int s; | |
251 | struct sockaddr_in addr; | |
252 | socklen_t addrlen = sizeof(addr); | |
253 | int opt; | |
254 | int master = -1; | |
255 | const char *argv[256]; | |
256 | #if 0 | |
257 | char buff[256]; | |
258 | #endif | |
259 | /* don't want to clobber the original */ | |
260 | char *bptr; | |
261 | const char *curarg; | |
262 | int c, i, ret; | |
263 | ||
264 | DEBUG_CALL("fork_exec"); | |
265 | DEBUG_ARG("so = %lx", (long)so); | |
266 | DEBUG_ARG("ex = %lx", (long)ex); | |
267 | DEBUG_ARG("do_pty = %lx", (long)do_pty); | |
268 | ||
269 | if (do_pty == 2) { | |
270 | #if 0 | |
271 | if (slirp_openpty(&master, &s) == -1) { | |
272 | lprint("Error: openpty failed: %s\n", strerror(errno)); | |
273 | return 0; | |
274 | } | |
275 | #else | |
276 | return 0; | |
277 | #endif | |
278 | } else { | |
279 | addr.sin_family = AF_INET; | |
280 | addr.sin_port = 0; | |
281 | addr.sin_addr.s_addr = INADDR_ANY; | |
282 | ||
283 | if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 || | |
284 | bind(s, (struct sockaddr *)&addr, addrlen) < 0 || | |
285 | listen(s, 1) < 0) { | |
286 | lprint("Error: inet socket: %s\n", strerror(errno)); | |
287 | closesocket(s); | |
288 | ||
289 | return 0; | |
290 | } | |
291 | } | |
292 | ||
293 | switch(fork()) { | |
294 | case -1: | |
295 | lprint("Error: fork failed: %s\n", strerror(errno)); | |
296 | close(s); | |
297 | if (do_pty == 2) | |
298 | close(master); | |
299 | return 0; | |
300 | ||
301 | case 0: | |
302 | /* Set the DISPLAY */ | |
303 | if (do_pty == 2) { | |
304 | (void) close(master); | |
305 | #ifdef TIOCSCTTY /* XXXXX */ | |
306 | (void) setsid(); | |
307 | ioctl(s, TIOCSCTTY, (char *)NULL); | |
308 | #endif | |
309 | } else { | |
310 | getsockname(s, (struct sockaddr *)&addr, &addrlen); | |
311 | close(s); | |
312 | /* | |
313 | * Connect to the socket | |
314 | * XXX If any of these fail, we're in trouble! | |
315 | */ | |
316 | s = socket(AF_INET, SOCK_STREAM, 0); | |
317 | addr.sin_addr = loopback_addr; | |
318 | do { | |
319 | ret = connect(s, (struct sockaddr *)&addr, addrlen); | |
320 | } while (ret < 0 && errno == EINTR); | |
321 | } | |
322 | ||
323 | #if 0 | |
324 | if (x_port >= 0) { | |
325 | #ifdef HAVE_SETENV | |
326 | sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen); | |
327 | setenv("DISPLAY", buff, 1); | |
328 | #else | |
329 | sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen); | |
330 | putenv(buff); | |
331 | #endif | |
332 | } | |
333 | #endif | |
334 | dup2(s, 0); | |
335 | dup2(s, 1); | |
336 | dup2(s, 2); | |
337 | for (s = getdtablesize() - 1; s >= 3; s--) | |
338 | close(s); | |
339 | ||
340 | i = 0; | |
341 | bptr = strdup(ex); /* No need to free() this */ | |
342 | if (do_pty == 1) { | |
343 | /* Setup "slirp.telnetd -x" */ | |
344 | argv[i++] = "slirp.telnetd"; | |
345 | argv[i++] = "-x"; | |
346 | argv[i++] = bptr; | |
347 | } else | |
348 | do { | |
349 | /* Change the string into argv[] */ | |
350 | curarg = bptr; | |
351 | while (*bptr != ' ' && *bptr != (char)0) | |
352 | bptr++; | |
353 | c = *bptr; | |
354 | *bptr++ = (char)0; | |
355 | argv[i++] = strdup(curarg); | |
356 | } while (c); | |
357 | ||
358 | argv[i] = NULL; | |
359 | execvp(argv[0], (char **)argv); | |
360 | ||
361 | /* Ooops, failed, let's tell the user why */ | |
362 | { | |
363 | char buff[256]; | |
364 | ||
365 | snprintf(buff, sizeof(buff), | |
366 | "Error: execvp of %s failed: %s\n", | |
367 | argv[0], strerror(errno)); | |
368 | write(2, buff, strlen(buff)+1); | |
369 | } | |
370 | close(0); close(1); close(2); /* XXX */ | |
371 | exit(1); | |
372 | ||
373 | default: | |
374 | if (do_pty == 2) { | |
375 | close(s); | |
376 | so->s = master; | |
377 | } else { | |
378 | /* | |
379 | * XXX this could block us... | |
380 | * XXX Should set a timer here, and if accept() doesn't | |
381 | * return after X seconds, declare it a failure | |
382 | * The only reason this will block forever is if socket() | |
383 | * of connect() fail in the child process | |
384 | */ | |
385 | do { | |
386 | so->s = accept(s, (struct sockaddr *)&addr, &addrlen); | |
387 | } while (so->s < 0 && errno == EINTR); | |
388 | closesocket(s); | |
389 | opt = 1; | |
390 | setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)); | |
391 | opt = 1; | |
392 | setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); | |
393 | } | |
394 | fd_nonblock(so->s); | |
395 | ||
396 | /* Append the telnet options now */ | |
397 | if (so->so_m != NULL && do_pty == 1) { | |
398 | sbappend(so, so->so_m); | |
399 | so->so_m = NULL; | |
400 | } | |
401 | ||
402 | return 1; | |
403 | } | |
404 | } | |
405 | #endif | |
406 | ||
407 | #ifndef HAVE_STRDUP | |
408 | char * | |
409 | strdup(str) | |
410 | const char *str; | |
411 | { | |
412 | char *bptr; | |
413 | ||
414 | bptr = (char *)malloc(strlen(str)+1); | |
415 | strcpy(bptr, str); | |
416 | ||
417 | return bptr; | |
418 | } | |
419 | #endif | |
420 | ||
421 | #if 0 | |
422 | void | |
423 | snooze_hup(num) | |
424 | int num; | |
425 | { | |
426 | int s, ret; | |
427 | #ifndef NO_UNIX_SOCKETS | |
428 | struct sockaddr_un sock_un; | |
429 | #endif | |
430 | struct sockaddr_in sock_in; | |
431 | char buff[256]; | |
432 | ||
433 | ret = -1; | |
434 | if (slirp_socket_passwd) { | |
435 | s = socket(AF_INET, SOCK_STREAM, 0); | |
436 | if (s < 0) | |
437 | slirp_exit(1); | |
438 | sock_in.sin_family = AF_INET; | |
439 | sock_in.sin_addr.s_addr = slirp_socket_addr; | |
440 | sock_in.sin_port = htons(slirp_socket_port); | |
441 | if (connect(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) != 0) | |
442 | slirp_exit(1); /* just exit...*/ | |
443 | sprintf(buff, "kill %s:%d", slirp_socket_passwd, slirp_socket_unit); | |
444 | write(s, buff, strlen(buff)+1); | |
445 | } | |
446 | #ifndef NO_UNIX_SOCKETS | |
447 | else { | |
448 | s = socket(AF_UNIX, SOCK_STREAM, 0); | |
449 | if (s < 0) | |
450 | slirp_exit(1); | |
451 | sock_un.sun_family = AF_UNIX; | |
452 | strcpy(sock_un.sun_path, socket_path); | |
453 | if (connect(s, (struct sockaddr *)&sock_un, | |
454 | sizeof(sock_un.sun_family) + sizeof(sock_un.sun_path)) != 0) | |
455 | slirp_exit(1); | |
456 | sprintf(buff, "kill none:%d", slirp_socket_unit); | |
457 | write(s, buff, strlen(buff)+1); | |
458 | } | |
459 | #endif | |
460 | slirp_exit(0); | |
461 | } | |
462 | ||
463 | ||
464 | void | |
465 | snooze() | |
466 | { | |
467 | sigset_t s; | |
468 | int i; | |
469 | ||
470 | /* Don't need our data anymore */ | |
471 | /* XXX This makes SunOS barf */ | |
472 | /* brk(0); */ | |
473 | ||
474 | /* Close all fd's */ | |
475 | for (i = 255; i >= 0; i--) | |
476 | close(i); | |
477 | ||
478 | signal(SIGQUIT, slirp_exit); | |
479 | signal(SIGHUP, snooze_hup); | |
480 | sigemptyset(&s); | |
481 | ||
482 | /* Wait for any signal */ | |
483 | sigsuspend(&s); | |
484 | ||
485 | /* Just in case ... */ | |
486 | exit(255); | |
487 | } | |
488 | ||
489 | void | |
490 | relay(s) | |
491 | int s; | |
492 | { | |
493 | char buf[8192]; | |
494 | int n; | |
495 | fd_set readfds; | |
496 | struct ttys *ttyp; | |
497 | ||
498 | /* Don't need our data anymore */ | |
499 | /* XXX This makes SunOS barf */ | |
500 | /* brk(0); */ | |
501 | ||
502 | signal(SIGQUIT, slirp_exit); | |
503 | signal(SIGHUP, slirp_exit); | |
504 | signal(SIGINT, slirp_exit); | |
505 | signal(SIGTERM, slirp_exit); | |
506 | ||
507 | /* Fudge to get term_raw and term_restore to work */ | |
508 | if (NULL == (ttyp = tty_attach (0, slirp_tty))) { | |
509 | lprint ("Error: tty_attach failed in misc.c:relay()\r\n"); | |
510 | slirp_exit (1); | |
511 | } | |
512 | ttyp->fd = 0; | |
513 | ttyp->flags |= TTY_CTTY; | |
514 | term_raw(ttyp); | |
515 | ||
516 | while (1) { | |
517 | FD_ZERO(&readfds); | |
518 | ||
519 | FD_SET(0, &readfds); | |
520 | FD_SET(s, &readfds); | |
521 | ||
522 | n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0); | |
523 | ||
524 | if (n <= 0) | |
525 | slirp_exit(0); | |
526 | ||
527 | if (FD_ISSET(0, &readfds)) { | |
528 | n = read(0, buf, 8192); | |
529 | if (n <= 0) | |
530 | slirp_exit(0); | |
531 | n = writen(s, buf, n); | |
532 | if (n <= 0) | |
533 | slirp_exit(0); | |
534 | } | |
535 | ||
536 | if (FD_ISSET(s, &readfds)) { | |
537 | n = read(s, buf, 8192); | |
538 | if (n <= 0) | |
539 | slirp_exit(0); | |
540 | n = writen(0, buf, n); | |
541 | if (n <= 0) | |
542 | slirp_exit(0); | |
543 | } | |
544 | } | |
545 | ||
546 | /* Just in case.... */ | |
547 | exit(1); | |
548 | } | |
549 | #endif | |
550 | ||
551 | #ifdef CONFIG_QEMU | |
552 | #include "monitor.h" | |
553 | ||
554 | void lprint(const char *format, ...) | |
555 | { | |
556 | va_list args; | |
557 | ||
558 | va_start(args, format); | |
559 | monitor_vprintf(cur_mon, format, args); | |
560 | va_end(args); | |
561 | } | |
562 | #else | |
563 | int (*lprint_print) _P((void *, const char *, va_list)); | |
564 | char *lprint_ptr, *lprint_ptr2, **lprint_arg; | |
565 | ||
566 | void | |
567 | #ifdef __STDC__ | |
568 | lprint(const char *format, ...) | |
569 | #else | |
570 | lprint(va_alist) va_dcl | |
571 | #endif | |
572 | { | |
573 | va_list args; | |
574 | ||
575 | #ifdef __STDC__ | |
576 | va_start(args, format); | |
577 | #else | |
578 | char *format; | |
579 | va_start(args); | |
580 | format = va_arg(args, char *); | |
581 | #endif | |
582 | #if 0 | |
583 | /* If we're printing to an sbuf, make sure there's enough room */ | |
584 | /* XXX +100? */ | |
585 | if (lprint_sb) { | |
586 | if ((lprint_ptr - lprint_sb->sb_wptr) >= | |
587 | (lprint_sb->sb_datalen - (strlen(format) + 100))) { | |
588 | int deltaw = lprint_sb->sb_wptr - lprint_sb->sb_data; | |
589 | int deltar = lprint_sb->sb_rptr - lprint_sb->sb_data; | |
590 | int deltap = lprint_ptr - lprint_sb->sb_data; | |
591 | ||
592 | lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data, | |
593 | lprint_sb->sb_datalen + TCP_SNDSPACE); | |
594 | ||
595 | /* Adjust all values */ | |
596 | lprint_sb->sb_wptr = lprint_sb->sb_data + deltaw; | |
597 | lprint_sb->sb_rptr = lprint_sb->sb_data + deltar; | |
598 | lprint_ptr = lprint_sb->sb_data + deltap; | |
599 | ||
600 | lprint_sb->sb_datalen += TCP_SNDSPACE; | |
601 | } | |
602 | } | |
603 | #endif | |
604 | if (lprint_print) | |
605 | lprint_ptr += (*lprint_print)(*lprint_arg, format, args); | |
606 | ||
607 | /* Check if they want output to be logged to file as well */ | |
608 | if (lfd) { | |
609 | /* | |
610 | * Remove \r's | |
611 | * otherwise you'll get ^M all over the file | |
612 | */ | |
613 | int len = strlen(format); | |
614 | char *bptr1, *bptr2; | |
615 | ||
616 | bptr1 = bptr2 = strdup(format); | |
617 | ||
618 | while (len--) { | |
619 | if (*bptr1 == '\r') | |
620 | memcpy(bptr1, bptr1+1, len+1); | |
621 | else | |
622 | bptr1++; | |
623 | } | |
624 | vfprintf(lfd, bptr2, args); | |
625 | free(bptr2); | |
626 | } | |
627 | va_end(args); | |
628 | } | |
629 | ||
630 | void | |
631 | add_emu(buff) | |
632 | char *buff; | |
633 | { | |
634 | u_int lport, fport; | |
635 | u_int8_t tos = 0, emu = 0; | |
636 | char buff1[256], buff2[256], buff4[128]; | |
637 | char *buff3 = buff4; | |
638 | struct emu_t *emup; | |
639 | struct socket *so; | |
640 | ||
641 | if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) { | |
642 | lprint("Error: Bad arguments\r\n"); | |
643 | return; | |
644 | } | |
645 | ||
646 | if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) { | |
647 | lport = 0; | |
648 | if (sscanf(buff1, "%d", &fport) != 1) { | |
649 | lprint("Error: Bad first argument\r\n"); | |
650 | return; | |
651 | } | |
652 | } | |
653 | ||
654 | if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) { | |
655 | buff3 = 0; | |
656 | if (sscanf(buff2, "%256s", buff1) != 1) { | |
657 | lprint("Error: Bad second argument\r\n"); | |
658 | return; | |
659 | } | |
660 | } | |
661 | ||
662 | if (buff3) { | |
663 | if (strcmp(buff3, "lowdelay") == 0) | |
664 | tos = IPTOS_LOWDELAY; | |
665 | else if (strcmp(buff3, "throughput") == 0) | |
666 | tos = IPTOS_THROUGHPUT; | |
667 | else { | |
668 | lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n"); | |
669 | return; | |
670 | } | |
671 | } | |
672 | ||
673 | if (strcmp(buff1, "ftp") == 0) | |
674 | emu = EMU_FTP; | |
675 | else if (strcmp(buff1, "irc") == 0) | |
676 | emu = EMU_IRC; | |
677 | else if (strcmp(buff1, "none") == 0) | |
678 | emu = EMU_NONE; /* ie: no emulation */ | |
679 | else { | |
680 | lprint("Error: Unknown service\r\n"); | |
681 | return; | |
682 | } | |
683 | ||
684 | /* First, check that it isn't already emulated */ | |
685 | for (emup = tcpemu; emup; emup = emup->next) { | |
686 | if (emup->lport == lport && emup->fport == fport) { | |
687 | lprint("Error: port already emulated\r\n"); | |
688 | return; | |
689 | } | |
690 | } | |
691 | ||
692 | /* link it */ | |
693 | emup = (struct emu_t *)malloc(sizeof (struct emu_t)); | |
694 | emup->lport = (u_int16_t)lport; | |
695 | emup->fport = (u_int16_t)fport; | |
696 | emup->tos = tos; | |
697 | emup->emu = emu; | |
698 | emup->next = tcpemu; | |
699 | tcpemu = emup; | |
700 | ||
701 | /* And finally, mark all current sessions, if any, as being emulated */ | |
702 | for (so = tcb.so_next; so != &tcb; so = so->so_next) { | |
703 | if ((lport && lport == ntohs(so->so_lport)) || | |
704 | (fport && fport == ntohs(so->so_fport))) { | |
705 | if (emu) | |
706 | so->so_emu = emu; | |
707 | if (tos) | |
708 | so->so_iptos = tos; | |
709 | } | |
710 | } | |
711 | ||
712 | lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport); | |
713 | } | |
714 | #endif | |
715 | ||
716 | #ifdef BAD_SPRINTF | |
717 | ||
718 | #undef vsprintf | |
719 | #undef sprintf | |
720 | ||
721 | /* | |
722 | * Some BSD-derived systems have a sprintf which returns char * | |
723 | */ | |
724 | ||
725 | int | |
726 | vsprintf_len(string, format, args) | |
727 | char *string; | |
728 | const char *format; | |
729 | va_list args; | |
730 | { | |
731 | vsprintf(string, format, args); | |
732 | return strlen(string); | |
733 | } | |
734 | ||
735 | int | |
736 | #ifdef __STDC__ | |
737 | sprintf_len(char *string, const char *format, ...) | |
738 | #else | |
739 | sprintf_len(va_alist) va_dcl | |
740 | #endif | |
741 | { | |
742 | va_list args; | |
743 | #ifdef __STDC__ | |
744 | va_start(args, format); | |
745 | #else | |
746 | char *string; | |
747 | char *format; | |
748 | va_start(args); | |
749 | string = va_arg(args, char *); | |
750 | format = va_arg(args, char *); | |
751 | #endif | |
752 | vsprintf(string, format, args); | |
753 | return strlen(string); | |
754 | } | |
755 | ||
756 | #endif | |
757 | ||
758 | void | |
759 | u_sleep(int usec) | |
760 | { | |
761 | struct timeval t; | |
762 | fd_set fdset; | |
763 | ||
764 | FD_ZERO(&fdset); | |
765 | ||
766 | t.tv_sec = 0; | |
767 | t.tv_usec = usec * 1000; | |
768 | ||
769 | select(0, &fdset, &fdset, &fdset, &t); | |
770 | } | |
771 | ||
772 | /* | |
773 | * Set fd blocking and non-blocking | |
774 | */ | |
775 | ||
776 | void | |
777 | fd_nonblock(int fd) | |
778 | { | |
779 | #ifdef FIONBIO | |
780 | #ifdef _WIN32 | |
781 | long opt = 1; | |
782 | #else | |
783 | int opt = 1; | |
784 | #endif | |
785 | ||
786 | ioctlsocket(fd, FIONBIO, &opt); | |
787 | #else | |
788 | int opt; | |
789 | ||
790 | opt = fcntl(fd, F_GETFL, 0); | |
791 | opt |= O_NONBLOCK; | |
792 | fcntl(fd, F_SETFL, opt); | |
793 | #endif | |
794 | } | |
795 | ||
796 | void | |
797 | fd_block(int fd) | |
798 | { | |
799 | #ifdef FIONBIO | |
800 | int opt = 0; | |
801 | ||
802 | ioctlsocket(fd, FIONBIO, &opt); | |
803 | #else | |
804 | int opt; | |
805 | ||
806 | opt = fcntl(fd, F_GETFL, 0); | |
807 | opt &= ~O_NONBLOCK; | |
808 | fcntl(fd, F_SETFL, opt); | |
809 | #endif | |
810 | } | |
811 | ||
812 | ||
813 | #if 0 | |
814 | /* | |
815 | * invoke RSH | |
816 | */ | |
817 | int | |
818 | rsh_exec(so,ns, user, host, args) | |
819 | struct socket *so; | |
820 | struct socket *ns; | |
821 | char *user; | |
822 | char *host; | |
823 | char *args; | |
824 | { | |
825 | int fd[2]; | |
826 | int fd0[2]; | |
827 | int s; | |
828 | char buff[256]; | |
829 | ||
830 | DEBUG_CALL("rsh_exec"); | |
831 | DEBUG_ARG("so = %lx", (long)so); | |
832 | ||
833 | if (pipe(fd)<0) { | |
834 | lprint("Error: pipe failed: %s\n", strerror(errno)); | |
835 | return 0; | |
836 | } | |
837 | /* #ifdef HAVE_SOCKETPAIR */ | |
838 | #if 1 | |
839 | if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) { | |
840 | close(fd[0]); | |
841 | close(fd[1]); | |
842 | lprint("Error: openpty failed: %s\n", strerror(errno)); | |
843 | return 0; | |
844 | } | |
845 | #else | |
846 | if (slirp_openpty(&fd0[0], &fd0[1]) == -1) { | |
847 | close(fd[0]); | |
848 | close(fd[1]); | |
849 | lprint("Error: openpty failed: %s\n", strerror(errno)); | |
850 | return 0; | |
851 | } | |
852 | #endif | |
853 | ||
854 | switch(fork()) { | |
855 | case -1: | |
856 | lprint("Error: fork failed: %s\n", strerror(errno)); | |
857 | close(fd[0]); | |
858 | close(fd[1]); | |
859 | close(fd0[0]); | |
860 | close(fd0[1]); | |
861 | return 0; | |
862 | ||
863 | case 0: | |
864 | close(fd[0]); | |
865 | close(fd0[0]); | |
866 | ||
867 | /* Set the DISPLAY */ | |
868 | if (x_port >= 0) { | |
869 | #ifdef HAVE_SETENV | |
870 | sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen); | |
871 | setenv("DISPLAY", buff, 1); | |
872 | #else | |
873 | sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen); | |
874 | putenv(buff); | |
875 | #endif | |
876 | } | |
877 | ||
878 | dup2(fd0[1], 0); | |
879 | dup2(fd0[1], 1); | |
880 | dup2(fd[1], 2); | |
881 | for (s = 3; s <= 255; s++) | |
882 | close(s); | |
883 | ||
884 | execlp("rsh","rsh","-l", user, host, args, NULL); | |
885 | ||
886 | /* Ooops, failed, let's tell the user why */ | |
887 | ||
888 | sprintf(buff, "Error: execlp of %s failed: %s\n", | |
889 | "rsh", strerror(errno)); | |
890 | write(2, buff, strlen(buff)+1); | |
891 | close(0); close(1); close(2); /* XXX */ | |
892 | exit(1); | |
893 | ||
894 | default: | |
895 | close(fd[1]); | |
896 | close(fd0[1]); | |
897 | ns->s=fd[0]; | |
898 | so->s=fd0[0]; | |
899 | ||
900 | return 1; | |
901 | } | |
902 | } | |
903 | #endif |