2 * Copyright (c) 1995 Danny Gasparovski.
4 * Please read the file COPYRIGHT for the
5 * terms and conditions of the copyright.
8 #define WANT_SYS_IOCTL_H
11 u_int curtime, time_fasttimo, last_slowtimo, detach_time;
12 u_int detach_wait = 600000; /* 10 minutes */
25 lprint("X Redir: X not being redirected.\r\n");
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);
32 lprint("X Redir: Redirecting to display %d\r\n", x_display);
40 * XXX Allow more than one X redirection?
43 redir_x(inaddr, start_port, display, screen)
52 lprint("X Redir: X already being redirected.\r\n");
55 for (i = 6001 + (start_port-1); i <= 6100; i++) {
56 if (solisten(htons(i), inaddr, htons(6000 + display), 0)) {
65 lprint("X Redir: Error: Couldn't redirect a port for X. Weird.\r\n");
70 #ifndef HAVE_INET_ATON
76 u_int32_t addr = inet_addr(cp);
77 if (addr == 0xffffffff)
85 * Get our IP address and put it in our_addr
93 if (gethostname(buff,256) < 0)
96 if ((he = gethostbyname(buff)) == NULL)
99 our_addr = *(struct in_addr *)he->h_addr;
102 #if SIZEOF_CHAR_P == 8
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;
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;
133 #endif /* SIZEOF_CHAR_P == 8 */
136 struct quehead *qh_link;
137 struct quehead *qh_rlink;
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;
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 ? */
168 add_exec(ex_ptr, do_pty, exec, addr, port)
169 struct ex_list **ex_ptr;
175 struct ex_list *tmp_ptr;
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)
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;
193 #ifndef HAVE_STRERROR
196 * For systems with no strerror
200 extern char *sys_errlist[];
206 if (error < sys_nerr)
207 return sys_errlist[error];
209 return "Unknown error.";
218 fork_exec(so, ex, do_pty)
223 /* not implemented */
230 slirp_openpty(amaster, aslave)
231 int *amaster, *aslave;
233 register int master, slave;
238 if ((master = open("/dev/ptmx", O_RDWR)) < 0 ||
239 grantpt(master) < 0 ||
240 unlockpt(master) < 0 ||
241 (ptr = ptsname(master)) == NULL) {
246 if ((slave = open(ptr, O_RDWR)) < 0 ||
247 ioctl(slave, I_PUSH, "ptem") < 0 ||
248 ioctl(slave, I_PUSH, "ldterm") < 0 ||
249 ioctl(slave, I_PUSH, "ttcompat") < 0) {
261 static char line[] = "/dev/ptyXX";
262 register const char *cp1, *cp2;
264 for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
266 for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
268 if ((master = open(line, O_RDWR, 0)) == -1) {
270 return (-1); /* out of ptys */
273 /* These will fail */
274 (void) chown(line, getuid(), 0);
275 (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
279 if ((slave = open(line, O_RDWR, 0)) != -1) {
284 (void) close(master);
289 errno = ENOENT; /* out of ptys */
296 * We create and bind a socket, then fork off to another
297 * process, which connects to this socket, after which we
298 * exec the wanted program. If something (strange) happens,
299 * the accept() call could block us forever.
301 * do_pty = 0 Fork/exec inetd style
302 * do_pty = 1 Fork/exec using slirp.telnetd
303 * do_ptr = 2 Fork/exec using pty
306 fork_exec(so, ex, do_pty)
312 struct sockaddr_in addr;
313 int addrlen = sizeof(addr);
320 /* don't want to clobber the original */
325 DEBUG_CALL("fork_exec");
326 DEBUG_ARG("so = %lx", (long)so);
327 DEBUG_ARG("ex = %lx", (long)ex);
328 DEBUG_ARG("do_pty = %lx", (long)do_pty);
331 if (slirp_openpty(&master, &s) == -1) {
332 lprint("Error: openpty failed: %s\n", strerror(errno));
336 addr.sin_family = AF_INET;
338 addr.sin_addr.s_addr = INADDR_ANY;
340 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
341 bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
343 lprint("Error: inet socket: %s\n", strerror(errno));
352 lprint("Error: fork failed: %s\n", strerror(errno));
359 /* Set the DISPLAY */
361 (void) close(master);
362 #ifdef TIOCSCTTY /* XXXXX */
364 ioctl(s, TIOCSCTTY, (char *)NULL);
367 getsockname(s, (struct sockaddr *)&addr, &addrlen);
370 * Connect to the socket
371 * XXX If any of these fail, we're in trouble!
373 s = socket(AF_INET, SOCK_STREAM, 0);
374 addr.sin_addr = loopback_addr;
376 ret = connect(s, (struct sockaddr *)&addr, addrlen);
377 } while (ret < 0 && errno == EINTR);
383 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
384 setenv("DISPLAY", buff, 1);
386 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
394 for (s = 3; s <= 255; s++)
398 bptr = strdup(ex); /* No need to free() this */
400 /* Setup "slirp.telnetd -x" */
401 argv[i++] = "slirp.telnetd";
406 /* Change the string into argv[] */
408 while (*bptr != ' ' && *bptr != (char)0)
412 argv[i++] = strdup(curarg);
416 execvp(argv[0], argv);
418 /* Ooops, failed, let's tell the user why */
422 sprintf(buff, "Error: execvp of %s failed: %s\n",
423 argv[0], strerror(errno));
424 write(2, buff, strlen(buff)+1);
426 close(0); close(1); close(2); /* XXX */
435 * XXX this could block us...
436 * XXX Should set a timer here, and if accept() doesn't
437 * return after X seconds, declare it a failure
438 * The only reason this will block forever is if socket()
439 * of connect() fail in the child process
442 so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
443 } while (so->s < 0 && errno == EINTR);
446 setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
448 setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
452 /* Append the telnet options now */
453 if (so->so_m != 0 && do_pty == 1) {
454 sbappend(so, so->so_m);
470 bptr = (char *)malloc(strlen(str)+1);
483 #ifndef NO_UNIX_SOCKETS
484 struct sockaddr_un sock_un;
486 struct sockaddr_in sock_in;
490 if (slirp_socket_passwd) {
491 s = socket(AF_INET, SOCK_STREAM, 0);
494 sock_in.sin_family = AF_INET;
495 sock_in.sin_addr.s_addr = slirp_socket_addr;
496 sock_in.sin_port = htons(slirp_socket_port);
497 if (connect(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) != 0)
498 slirp_exit(1); /* just exit...*/
499 sprintf(buff, "kill %s:%d", slirp_socket_passwd, slirp_socket_unit);
500 write(s, buff, strlen(buff)+1);
502 #ifndef NO_UNIX_SOCKETS
504 s = socket(AF_UNIX, SOCK_STREAM, 0);
507 sock_un.sun_family = AF_UNIX;
508 strcpy(sock_un.sun_path, socket_path);
509 if (connect(s, (struct sockaddr *)&sock_un,
510 sizeof(sock_un.sun_family) + sizeof(sock_un.sun_path)) != 0)
512 sprintf(buff, "kill none:%d", slirp_socket_unit);
513 write(s, buff, strlen(buff)+1);
526 /* Don't need our data anymore */
527 /* XXX This makes SunOS barf */
531 for (i = 255; i >= 0; i--)
534 signal(SIGQUIT, slirp_exit);
535 signal(SIGHUP, snooze_hup);
538 /* Wait for any signal */
541 /* Just in case ... */
554 /* Don't need our data anymore */
555 /* XXX This makes SunOS barf */
558 signal(SIGQUIT, slirp_exit);
559 signal(SIGHUP, slirp_exit);
560 signal(SIGINT, slirp_exit);
561 signal(SIGTERM, slirp_exit);
563 /* Fudge to get term_raw and term_restore to work */
564 if (NULL == (ttyp = tty_attach (0, slirp_tty))) {
565 lprint ("Error: tty_attach failed in misc.c:relay()\r\n");
569 ttyp->flags |= TTY_CTTY;
578 n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
583 if (FD_ISSET(0, &readfds)) {
584 n = read(0, buf, 8192);
587 n = writen(s, buf, n);
592 if (FD_ISSET(s, &readfds)) {
593 n = read(s, buf, 8192);
596 n = writen(0, buf, n);
602 /* Just in case.... */
607 int (*lprint_print) _P((void *, const char *, va_list));
608 char *lprint_ptr, *lprint_ptr2, **lprint_arg;
612 lprint(const char *format, ...)
614 lprint(va_alist) va_dcl
620 va_start(args, format);
624 format = va_arg(args, char *);
627 /* If we're printing to an sbuf, make sure there's enough room */
630 if ((lprint_ptr - lprint_sb->sb_wptr) >=
631 (lprint_sb->sb_datalen - (strlen(format) + 100))) {
632 int deltaw = lprint_sb->sb_wptr - lprint_sb->sb_data;
633 int deltar = lprint_sb->sb_rptr - lprint_sb->sb_data;
634 int deltap = lprint_ptr - lprint_sb->sb_data;
636 lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data,
637 lprint_sb->sb_datalen + TCP_SNDSPACE);
639 /* Adjust all values */
640 lprint_sb->sb_wptr = lprint_sb->sb_data + deltaw;
641 lprint_sb->sb_rptr = lprint_sb->sb_data + deltar;
642 lprint_ptr = lprint_sb->sb_data + deltap;
644 lprint_sb->sb_datalen += TCP_SNDSPACE;
649 lprint_ptr += (*lprint_print)(*lprint_arg, format, args);
651 /* Check if they want output to be logged to file as well */
655 * otherwise you'll get ^M all over the file
657 int len = strlen(format);
660 bptr1 = bptr2 = strdup(format);
664 memcpy(bptr1, bptr1+1, len+1);
668 vfprintf(lfd, bptr2, args);
679 u_int8_t tos = 0, emu = 0;
680 char buff1[256], buff2[256], buff4[128];
685 if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) {
686 lprint("Error: Bad arguments\r\n");
690 if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) {
692 if (sscanf(buff1, "%d", &fport) != 1) {
693 lprint("Error: Bad first argument\r\n");
698 if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) {
700 if (sscanf(buff2, "%256s", buff1) != 1) {
701 lprint("Error: Bad second argument\r\n");
707 if (strcmp(buff3, "lowdelay") == 0)
708 tos = IPTOS_LOWDELAY;
709 else if (strcmp(buff3, "throughput") == 0)
710 tos = IPTOS_THROUGHPUT;
712 lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n");
717 if (strcmp(buff1, "ftp") == 0)
719 else if (strcmp(buff1, "irc") == 0)
721 else if (strcmp(buff1, "none") == 0)
722 emu = EMU_NONE; /* ie: no emulation */
724 lprint("Error: Unknown service\r\n");
728 /* First, check that it isn't already emulated */
729 for (emup = tcpemu; emup; emup = emup->next) {
730 if (emup->lport == lport && emup->fport == fport) {
731 lprint("Error: port already emulated\r\n");
737 emup = (struct emu_t *)malloc(sizeof (struct emu_t));
738 emup->lport = (u_int16_t)lport;
739 emup->fport = (u_int16_t)fport;
745 /* And finally, mark all current sessions, if any, as being emulated */
746 for (so = tcb.so_next; so != &tcb; so = so->so_next) {
747 if ((lport && lport == ntohs(so->so_lport)) ||
748 (fport && fport == ntohs(so->so_fport))) {
756 lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport);
765 * Some BSD-derived systems have a sprintf which returns char *
769 vsprintf_len(string, format, args)
774 vsprintf(string, format, args);
775 return strlen(string);
780 sprintf_len(char *string, const char *format, ...)
782 sprintf_len(va_alist) va_dcl
787 va_start(args, format);
792 string = va_arg(args, char *);
793 format = va_arg(args, char *);
795 vsprintf(string, format, args);
796 return strlen(string);
811 t.tv_usec = usec * 1000;
813 select(0, &fdset, &fdset, &fdset, &t);
817 * Set fd blocking and non-blocking
827 ioctlsocket(fd, FIONBIO, &opt);
831 opt = fcntl(fd, F_GETFL, 0);
833 fcntl(fd, F_SETFL, opt);
844 ioctlsocket(fd, FIONBIO, &opt);
848 opt = fcntl(fd, F_GETFL, 0);
850 fcntl(fd, F_SETFL, opt);
860 rsh_exec(so,ns, user, host, args)
872 DEBUG_CALL("rsh_exec");
873 DEBUG_ARG("so = %lx", (long)so);
876 lprint("Error: pipe failed: %s\n", strerror(errno));
879 /* #ifdef HAVE_SOCKETPAIR */
881 if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) {
884 lprint("Error: openpty failed: %s\n", strerror(errno));
888 if (slirp_openpty(&fd0[0], &fd0[1]) == -1) {
891 lprint("Error: openpty failed: %s\n", strerror(errno));
898 lprint("Error: fork failed: %s\n", strerror(errno));
909 /* Set the DISPLAY */
912 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
913 setenv("DISPLAY", buff, 1);
915 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
923 for (s = 3; s <= 255; s++)
926 execlp("rsh","rsh","-l", user, host, args, NULL);
928 /* Ooops, failed, let's tell the user why */
930 sprintf(buff, "Error: execlp of %s failed: %s\n",
931 "rsh", strerror(errno));
932 write(2, buff, strlen(buff)+1);
933 close(0); close(1); close(2); /* XXX */