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
91 struct hostent *he = NULL;
93 if (gethostname(buff,256) == 0)
94 he = gethostbyname(buff);
96 our_addr = *(struct in_addr *)he->h_addr;
97 if (our_addr.s_addr == 0)
98 our_addr.s_addr = loopback_addr.s_addr;
101 #if SIZEOF_CHAR_P == 8
113 register struct quehead_32 *element = (struct quehead_32 *) a;
114 register struct quehead_32 *head = (struct quehead_32 *) b;
115 element->qh_link = head->qh_link;
116 head->qh_link = (u_int32_t)element;
117 element->qh_rlink = (u_int32_t)head;
118 ((struct quehead_32 *)(element->qh_link))->qh_rlink
119 = (u_int32_t)element;
126 register struct quehead_32 *element = (struct quehead_32 *) a;
127 ((struct quehead_32 *)(element->qh_link))->qh_rlink = element->qh_rlink;
128 ((struct quehead_32 *)(element->qh_rlink))->qh_link = element->qh_link;
129 element->qh_rlink = 0;
132 #endif /* SIZEOF_CHAR_P == 8 */
135 struct quehead *qh_link;
136 struct quehead *qh_rlink;
143 register struct quehead *element = (struct quehead *) a;
144 register struct quehead *head = (struct quehead *) b;
145 element->qh_link = head->qh_link;
146 head->qh_link = (struct quehead *)element;
147 element->qh_rlink = (struct quehead *)head;
148 ((struct quehead *)(element->qh_link))->qh_rlink
149 = (struct quehead *)element;
156 register struct quehead *element = (struct quehead *) a;
157 ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
158 ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
159 element->qh_rlink = NULL;
160 /* element->qh_link = NULL; TCP FIN1 crashes if you do this. Why ? */
167 add_exec(ex_ptr, do_pty, exec, addr, port)
168 struct ex_list **ex_ptr;
174 struct ex_list *tmp_ptr;
176 /* First, check if the port is "bound" */
177 for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
178 if (port == tmp_ptr->ex_fport && addr == tmp_ptr->ex_addr)
183 *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
184 (*ex_ptr)->ex_fport = port;
185 (*ex_ptr)->ex_addr = addr;
186 (*ex_ptr)->ex_pty = do_pty;
187 (*ex_ptr)->ex_exec = strdup(exec);
188 (*ex_ptr)->ex_next = tmp_ptr;
192 #ifndef HAVE_STRERROR
195 * For systems with no strerror
199 extern char *sys_errlist[];
205 if (error < sys_nerr)
206 return sys_errlist[error];
208 return "Unknown error.";
217 fork_exec(so, ex, do_pty)
222 /* not implemented */
229 slirp_openpty(amaster, aslave)
230 int *amaster, *aslave;
232 register int master, slave;
237 if ((master = open("/dev/ptmx", O_RDWR)) < 0 ||
238 grantpt(master) < 0 ||
239 unlockpt(master) < 0 ||
240 (ptr = ptsname(master)) == NULL) {
245 if ((slave = open(ptr, O_RDWR)) < 0 ||
246 ioctl(slave, I_PUSH, "ptem") < 0 ||
247 ioctl(slave, I_PUSH, "ldterm") < 0 ||
248 ioctl(slave, I_PUSH, "ttcompat") < 0) {
260 static char line[] = "/dev/ptyXX";
261 register const char *cp1, *cp2;
263 for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
265 for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
267 if ((master = open(line, O_RDWR, 0)) == -1) {
269 return (-1); /* out of ptys */
272 /* These will fail */
273 (void) chown(line, getuid(), 0);
274 (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
278 if ((slave = open(line, O_RDWR, 0)) != -1) {
283 (void) close(master);
288 errno = ENOENT; /* out of ptys */
295 * We create and bind a socket, then fork off to another
296 * process, which connects to this socket, after which we
297 * exec the wanted program. If something (strange) happens,
298 * the accept() call could block us forever.
300 * do_pty = 0 Fork/exec inetd style
301 * do_pty = 1 Fork/exec using slirp.telnetd
302 * do_ptr = 2 Fork/exec using pty
305 fork_exec(so, ex, do_pty)
311 struct sockaddr_in addr;
312 int addrlen = sizeof(addr);
319 /* don't want to clobber the original */
324 DEBUG_CALL("fork_exec");
325 DEBUG_ARG("so = %lx", (long)so);
326 DEBUG_ARG("ex = %lx", (long)ex);
327 DEBUG_ARG("do_pty = %lx", (long)do_pty);
330 if (slirp_openpty(&master, &s) == -1) {
331 lprint("Error: openpty failed: %s\n", strerror(errno));
335 addr.sin_family = AF_INET;
337 addr.sin_addr.s_addr = INADDR_ANY;
339 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
340 bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
342 lprint("Error: inet socket: %s\n", strerror(errno));
351 lprint("Error: fork failed: %s\n", strerror(errno));
358 /* Set the DISPLAY */
360 (void) close(master);
361 #ifdef TIOCSCTTY /* XXXXX */
363 ioctl(s, TIOCSCTTY, (char *)NULL);
366 getsockname(s, (struct sockaddr *)&addr, &addrlen);
369 * Connect to the socket
370 * XXX If any of these fail, we're in trouble!
372 s = socket(AF_INET, SOCK_STREAM, 0);
373 addr.sin_addr = loopback_addr;
375 ret = connect(s, (struct sockaddr *)&addr, addrlen);
376 } while (ret < 0 && errno == EINTR);
382 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
383 setenv("DISPLAY", buff, 1);
385 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
393 for (s = 3; s <= 255; s++)
397 bptr = strdup(ex); /* No need to free() this */
399 /* Setup "slirp.telnetd -x" */
400 argv[i++] = "slirp.telnetd";
405 /* Change the string into argv[] */
407 while (*bptr != ' ' && *bptr != (char)0)
411 argv[i++] = strdup(curarg);
415 execvp(argv[0], argv);
417 /* Ooops, failed, let's tell the user why */
421 sprintf(buff, "Error: execvp of %s failed: %s\n",
422 argv[0], strerror(errno));
423 write(2, buff, strlen(buff)+1);
425 close(0); close(1); close(2); /* XXX */
434 * XXX this could block us...
435 * XXX Should set a timer here, and if accept() doesn't
436 * return after X seconds, declare it a failure
437 * The only reason this will block forever is if socket()
438 * of connect() fail in the child process
441 so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
442 } while (so->s < 0 && errno == EINTR);
445 setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
447 setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
451 /* Append the telnet options now */
452 if (so->so_m != 0 && do_pty == 1) {
453 sbappend(so, so->so_m);
469 bptr = (char *)malloc(strlen(str)+1);
482 #ifndef NO_UNIX_SOCKETS
483 struct sockaddr_un sock_un;
485 struct sockaddr_in sock_in;
489 if (slirp_socket_passwd) {
490 s = socket(AF_INET, SOCK_STREAM, 0);
493 sock_in.sin_family = AF_INET;
494 sock_in.sin_addr.s_addr = slirp_socket_addr;
495 sock_in.sin_port = htons(slirp_socket_port);
496 if (connect(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) != 0)
497 slirp_exit(1); /* just exit...*/
498 sprintf(buff, "kill %s:%d", slirp_socket_passwd, slirp_socket_unit);
499 write(s, buff, strlen(buff)+1);
501 #ifndef NO_UNIX_SOCKETS
503 s = socket(AF_UNIX, SOCK_STREAM, 0);
506 sock_un.sun_family = AF_UNIX;
507 strcpy(sock_un.sun_path, socket_path);
508 if (connect(s, (struct sockaddr *)&sock_un,
509 sizeof(sock_un.sun_family) + sizeof(sock_un.sun_path)) != 0)
511 sprintf(buff, "kill none:%d", slirp_socket_unit);
512 write(s, buff, strlen(buff)+1);
525 /* Don't need our data anymore */
526 /* XXX This makes SunOS barf */
530 for (i = 255; i >= 0; i--)
533 signal(SIGQUIT, slirp_exit);
534 signal(SIGHUP, snooze_hup);
537 /* Wait for any signal */
540 /* Just in case ... */
553 /* Don't need our data anymore */
554 /* XXX This makes SunOS barf */
557 signal(SIGQUIT, slirp_exit);
558 signal(SIGHUP, slirp_exit);
559 signal(SIGINT, slirp_exit);
560 signal(SIGTERM, slirp_exit);
562 /* Fudge to get term_raw and term_restore to work */
563 if (NULL == (ttyp = tty_attach (0, slirp_tty))) {
564 lprint ("Error: tty_attach failed in misc.c:relay()\r\n");
568 ttyp->flags |= TTY_CTTY;
577 n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
582 if (FD_ISSET(0, &readfds)) {
583 n = read(0, buf, 8192);
586 n = writen(s, buf, n);
591 if (FD_ISSET(s, &readfds)) {
592 n = read(s, buf, 8192);
595 n = writen(0, buf, n);
601 /* Just in case.... */
607 void lprint(const char *format, ...)
611 va_start(args, format);
612 term_vprintf(format, args);
616 int (*lprint_print) _P((void *, const char *, va_list));
617 char *lprint_ptr, *lprint_ptr2, **lprint_arg;
621 lprint(const char *format, ...)
623 lprint(va_alist) va_dcl
629 va_start(args, format);
633 format = va_arg(args, char *);
636 /* If we're printing to an sbuf, make sure there's enough room */
639 if ((lprint_ptr - lprint_sb->sb_wptr) >=
640 (lprint_sb->sb_datalen - (strlen(format) + 100))) {
641 int deltaw = lprint_sb->sb_wptr - lprint_sb->sb_data;
642 int deltar = lprint_sb->sb_rptr - lprint_sb->sb_data;
643 int deltap = lprint_ptr - lprint_sb->sb_data;
645 lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data,
646 lprint_sb->sb_datalen + TCP_SNDSPACE);
648 /* Adjust all values */
649 lprint_sb->sb_wptr = lprint_sb->sb_data + deltaw;
650 lprint_sb->sb_rptr = lprint_sb->sb_data + deltar;
651 lprint_ptr = lprint_sb->sb_data + deltap;
653 lprint_sb->sb_datalen += TCP_SNDSPACE;
658 lprint_ptr += (*lprint_print)(*lprint_arg, format, args);
660 /* Check if they want output to be logged to file as well */
664 * otherwise you'll get ^M all over the file
666 int len = strlen(format);
669 bptr1 = bptr2 = strdup(format);
673 memcpy(bptr1, bptr1+1, len+1);
677 vfprintf(lfd, bptr2, args);
688 u_int8_t tos = 0, emu = 0;
689 char buff1[256], buff2[256], buff4[128];
694 if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) {
695 lprint("Error: Bad arguments\r\n");
699 if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) {
701 if (sscanf(buff1, "%d", &fport) != 1) {
702 lprint("Error: Bad first argument\r\n");
707 if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) {
709 if (sscanf(buff2, "%256s", buff1) != 1) {
710 lprint("Error: Bad second argument\r\n");
716 if (strcmp(buff3, "lowdelay") == 0)
717 tos = IPTOS_LOWDELAY;
718 else if (strcmp(buff3, "throughput") == 0)
719 tos = IPTOS_THROUGHPUT;
721 lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n");
726 if (strcmp(buff1, "ftp") == 0)
728 else if (strcmp(buff1, "irc") == 0)
730 else if (strcmp(buff1, "none") == 0)
731 emu = EMU_NONE; /* ie: no emulation */
733 lprint("Error: Unknown service\r\n");
737 /* First, check that it isn't already emulated */
738 for (emup = tcpemu; emup; emup = emup->next) {
739 if (emup->lport == lport && emup->fport == fport) {
740 lprint("Error: port already emulated\r\n");
746 emup = (struct emu_t *)malloc(sizeof (struct emu_t));
747 emup->lport = (u_int16_t)lport;
748 emup->fport = (u_int16_t)fport;
754 /* And finally, mark all current sessions, if any, as being emulated */
755 for (so = tcb.so_next; so != &tcb; so = so->so_next) {
756 if ((lport && lport == ntohs(so->so_lport)) ||
757 (fport && fport == ntohs(so->so_fport))) {
765 lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport);
775 * Some BSD-derived systems have a sprintf which returns char *
779 vsprintf_len(string, format, args)
784 vsprintf(string, format, args);
785 return strlen(string);
790 sprintf_len(char *string, const char *format, ...)
792 sprintf_len(va_alist) va_dcl
797 va_start(args, format);
802 string = va_arg(args, char *);
803 format = va_arg(args, char *);
805 vsprintf(string, format, args);
806 return strlen(string);
821 t.tv_usec = usec * 1000;
823 select(0, &fdset, &fdset, &fdset, &t);
827 * Set fd blocking and non-blocking
837 ioctlsocket(fd, FIONBIO, &opt);
841 opt = fcntl(fd, F_GETFL, 0);
843 fcntl(fd, F_SETFL, opt);
854 ioctlsocket(fd, FIONBIO, &opt);
858 opt = fcntl(fd, F_GETFL, 0);
860 fcntl(fd, F_SETFL, opt);
870 rsh_exec(so,ns, user, host, args)
882 DEBUG_CALL("rsh_exec");
883 DEBUG_ARG("so = %lx", (long)so);
886 lprint("Error: pipe failed: %s\n", strerror(errno));
889 /* #ifdef HAVE_SOCKETPAIR */
891 if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) {
894 lprint("Error: openpty failed: %s\n", strerror(errno));
898 if (slirp_openpty(&fd0[0], &fd0[1]) == -1) {
901 lprint("Error: openpty failed: %s\n", strerror(errno));
908 lprint("Error: fork failed: %s\n", strerror(errno));
919 /* Set the DISPLAY */
922 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
923 setenv("DISPLAY", buff, 1);
925 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
933 for (s = 3; s <= 255; s++)
936 execlp("rsh","rsh","-l", user, host, args, NULL);
938 /* Ooops, failed, let's tell the user why */
940 sprintf(buff, "Error: execlp of %s failed: %s\n",
941 "rsh", strerror(errno));
942 write(2, buff, strlen(buff)+1);
943 close(0); close(1); close(2); /* XXX */