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.";
217 openpty(amaster, aslave)
218 int *amaster, *aslave;
220 register int master, slave;
225 if ((master = open("/dev/ptmx", O_RDWR)) < 0 ||
226 grantpt(master) < 0 ||
227 unlockpt(master) < 0 ||
228 (ptr = ptsname(master)) == NULL) {
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) {
248 static char line[] = "/dev/ptyXX";
249 register const char *cp1, *cp2;
251 for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
253 for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
255 if ((master = open(line, O_RDWR, 0)) == -1) {
257 return (-1); /* out of ptys */
260 /* These will fail */
261 (void) chown(line, getuid(), 0);
262 (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
266 if ((slave = open(line, O_RDWR, 0)) != -1) {
271 (void) close(master);
276 errno = ENOENT; /* out of ptys */
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.
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
293 fork_exec(so, ex, do_pty)
299 struct sockaddr_in addr;
300 int addrlen = sizeof(addr);
305 /* don't want to clobber the original */
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);
316 if (openpty(&master, &s) == -1) {
317 lprint("Error: openpty failed: %s\n", strerror(errno));
321 addr.sin_family = AF_INET;
323 addr.sin_addr.s_addr = INADDR_ANY;
325 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
326 bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
328 lprint("Error: inet socket: %s\n", strerror(errno));
337 lprint("Error: fork failed: %s\n", strerror(errno));
344 /* Set the DISPLAY */
346 (void) close(master);
347 #ifdef TIOCSCTTY /* XXXXX */
349 ioctl(s, TIOCSCTTY, (char *)NULL);
352 getsockname(s, (struct sockaddr *)&addr, &addrlen);
355 * Connect to the socket
356 * XXX If any of these fail, we're in trouble!
358 s = socket(AF_INET, SOCK_STREAM, 0);
359 addr.sin_addr = loopback_addr;
360 connect(s, (struct sockaddr *)&addr, addrlen);
365 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
366 setenv("DISPLAY", buff, 1);
368 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
376 for (s = 3; s <= 255; s++)
380 bptr = strdup(ex); /* No need to free() this */
382 /* Setup "slirp.telnetd -x" */
383 argv[i++] = "slirp.telnetd";
388 /* Change the string into argv[] */
390 while (*bptr != ' ' && *bptr != (char)0)
394 argv[i++] = strdup(curarg);
398 execvp(argv[0], argv);
400 /* Ooops, failed, let's tell the user why */
404 sprintf(buff, "Error: execvp of %s failed: %s\n",
405 argv[0], strerror(errno));
406 write(2, buff, strlen(buff)+1);
408 close(0); close(1); close(2); /* XXX */
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
423 so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
426 setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
428 setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
432 /* Append the telnet options now */
433 if (so->so_m != 0 && do_pty == 1) {
434 sbappend(so, so->so_m);
450 bptr = (char *)malloc(strlen(str)+1);
463 #ifndef NO_UNIX_SOCKETS
464 struct sockaddr_un sock_un;
466 struct sockaddr_in sock_in;
470 if (slirp_socket_passwd) {
471 s = socket(AF_INET, SOCK_STREAM, 0);
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);
482 #ifndef NO_UNIX_SOCKETS
484 s = socket(AF_UNIX, SOCK_STREAM, 0);
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)
492 sprintf(buff, "kill none:%d", slirp_socket_unit);
493 write(s, buff, strlen(buff)+1);
506 /* Don't need our data anymore */
507 /* XXX This makes SunOS barf */
511 for (i = 255; i >= 0; i--)
514 signal(SIGQUIT, slirp_exit);
515 signal(SIGHUP, snooze_hup);
518 /* Wait for any signal */
521 /* Just in case ... */
534 /* Don't need our data anymore */
535 /* XXX This makes SunOS barf */
538 signal(SIGQUIT, slirp_exit);
539 signal(SIGHUP, slirp_exit);
540 signal(SIGINT, slirp_exit);
541 signal(SIGTERM, slirp_exit);
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");
549 ttyp->flags |= TTY_CTTY;
558 n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
563 if (FD_ISSET(0, &readfds)) {
564 n = read(0, buf, 8192);
567 n = writen(s, buf, n);
572 if (FD_ISSET(s, &readfds)) {
573 n = read(s, buf, 8192);
576 n = writen(0, buf, n);
582 /* Just in case.... */
587 int (*lprint_print) _P((void *, const char *, va_list));
588 char *lprint_ptr, *lprint_ptr2, **lprint_arg;
592 lprint(const char *format, ...)
594 lprint(va_alist) va_dcl
600 va_start(args, format);
604 format = va_arg(args, char *);
607 /* If we're printing to an sbuf, make sure there's enough room */
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;
616 lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data,
617 lprint_sb->sb_datalen + TCP_SNDSPACE);
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;
624 lprint_sb->sb_datalen += TCP_SNDSPACE;
629 lprint_ptr += (*lprint_print)(*lprint_arg, format, args);
631 /* Check if they want output to be logged to file as well */
635 * otherwise you'll get ^M all over the file
637 int len = strlen(format);
640 bptr1 = bptr2 = strdup(format);
644 memcpy(bptr1, bptr1+1, len+1);
648 vfprintf(lfd, bptr2, args);
659 u_int8_t tos = 0, emu = 0;
660 char buff1[256], buff2[256], buff4[128];
665 if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) {
666 lprint("Error: Bad arguments\r\n");
670 if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) {
672 if (sscanf(buff1, "%d", &fport) != 1) {
673 lprint("Error: Bad first argument\r\n");
678 if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) {
680 if (sscanf(buff2, "%256s", buff1) != 1) {
681 lprint("Error: Bad second argument\r\n");
687 if (strcmp(buff3, "lowdelay") == 0)
688 tos = IPTOS_LOWDELAY;
689 else if (strcmp(buff3, "throughput") == 0)
690 tos = IPTOS_THROUGHPUT;
692 lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n");
697 if (strcmp(buff1, "ftp") == 0)
699 else if (strcmp(buff1, "irc") == 0)
701 else if (strcmp(buff1, "none") == 0)
702 emu = EMU_NONE; /* ie: no emulation */
704 lprint("Error: Unknown service\r\n");
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");
717 emup = (struct emu_t *)malloc(sizeof (struct emu_t));
718 emup->lport = (u_int16_t)lport;
719 emup->fport = (u_int16_t)fport;
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))) {
736 lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport);
745 * Some BSD-derived systems have a sprintf which returns char *
749 vsprintf_len(string, format, args)
754 vsprintf(string, format, args);
755 return strlen(string);
760 sprintf_len(char *string, const char *format, ...)
762 sprintf_len(va_alist) va_dcl
767 va_start(args, format);
772 string = va_arg(args, char *);
773 format = va_arg(args, char *);
775 vsprintf(string, format, args);
776 return strlen(string);
791 t.tv_usec = usec * 1000;
793 select(0, &fdset, &fdset, &fdset, &t);
797 * Set fd blocking and non-blocking
807 ioctlsocket(fd, FIONBIO, &opt);
811 opt = fcntl(fd, F_GETFL, 0);
813 fcntl(fd, F_SETFL, opt);
824 ioctlsocket(fd, FIONBIO, &opt);
828 opt = fcntl(fd, F_GETFL, 0);
830 fcntl(fd, F_SETFL, opt);
840 rsh_exec(so,ns, user, host, args)
852 DEBUG_CALL("rsh_exec");
853 DEBUG_ARG("so = %lx", (long)so);
856 lprint("Error: pipe failed: %s\n", strerror(errno));
859 /* #ifdef HAVE_SOCKETPAIR */
861 if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) {
864 lprint("Error: openpty failed: %s\n", strerror(errno));
868 if (openpty(&fd0[0], &fd0[1]) == -1) {
871 lprint("Error: openpty failed: %s\n", strerror(errno));
878 lprint("Error: fork failed: %s\n", strerror(errno));
889 /* Set the DISPLAY */
892 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
893 setenv("DISPLAY", buff, 1);
895 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
903 for (s = 3; s <= 255; s++)
906 execlp("rsh","rsh","-l", user, host, args, NULL);
908 /* Ooops, failed, let's tell the user why */
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 */