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;
24 lprint("X Redir: X not being redirected.\r\n");
26 lprint("X Redir: In sh/bash/zsh/etc. type: DISPLAY=%s:%d.%d; export DISPLAY\r\n",
27 inet_ntoa(our_addr), x_port, x_screen);
28 lprint("X Redir: In csh/tcsh/etc. type: setenv DISPLAY %s:%d.%d\r\n",
29 inet_ntoa(our_addr), x_port, x_screen);
31 lprint("X Redir: Redirecting to display %d\r\n", x_display);
39 * XXX Allow more than one X redirection?
42 redir_x(inaddr, start_port, display, screen)
51 lprint("X Redir: X already being redirected.\r\n");
54 for (i = 6001 + (start_port-1); i <= 6100; i++) {
55 if (solisten(htons(i), inaddr, htons(6000 + display), 0)) {
64 lprint("X Redir: Error: Couldn't redirect a port for X. Weird.\r\n");
69 #ifndef HAVE_INET_ATON
75 u_int32_t addr = inet_addr(cp);
76 if (addr == 0xffffffff)
84 * Get our IP address and put it in our_addr
90 struct hostent *he = NULL;
92 if (gethostname(buff,256) == 0)
93 he = gethostbyname(buff);
95 our_addr = *(struct in_addr *)he->h_addr;
96 if (our_addr.s_addr == 0)
97 our_addr.s_addr = loopback_addr.s_addr;
100 #if SIZEOF_CHAR_P == 8
112 register struct quehead_32 *element = (struct quehead_32 *) a;
113 register struct quehead_32 *head = (struct quehead_32 *) b;
114 element->qh_link = head->qh_link;
115 head->qh_link = (u_int32_t)element;
116 element->qh_rlink = (u_int32_t)head;
117 ((struct quehead_32 *)(element->qh_link))->qh_rlink
118 = (u_int32_t)element;
125 register struct quehead_32 *element = (struct quehead_32 *) a;
126 ((struct quehead_32 *)(element->qh_link))->qh_rlink = element->qh_rlink;
127 ((struct quehead_32 *)(element->qh_rlink))->qh_link = element->qh_link;
128 element->qh_rlink = 0;
131 #endif /* SIZEOF_CHAR_P == 8 */
134 struct quehead *qh_link;
135 struct quehead *qh_rlink;
142 register struct quehead *element = (struct quehead *) a;
143 register struct quehead *head = (struct quehead *) b;
144 element->qh_link = head->qh_link;
145 head->qh_link = (struct quehead *)element;
146 element->qh_rlink = (struct quehead *)head;
147 ((struct quehead *)(element->qh_link))->qh_rlink
148 = (struct quehead *)element;
155 register struct quehead *element = (struct quehead *) a;
156 ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
157 ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
158 element->qh_rlink = NULL;
159 /* element->qh_link = NULL; TCP FIN1 crashes if you do this. Why ? */
166 add_exec(ex_ptr, do_pty, exec, addr, port)
167 struct ex_list **ex_ptr;
173 struct ex_list *tmp_ptr;
175 /* First, check if the port is "bound" */
176 for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
177 if (port == tmp_ptr->ex_fport && addr == tmp_ptr->ex_addr)
182 *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
183 (*ex_ptr)->ex_fport = port;
184 (*ex_ptr)->ex_addr = addr;
185 (*ex_ptr)->ex_pty = do_pty;
186 (*ex_ptr)->ex_exec = strdup(exec);
187 (*ex_ptr)->ex_next = tmp_ptr;
191 #ifndef HAVE_STRERROR
194 * For systems with no strerror
198 extern char *sys_errlist[];
204 if (error < sys_nerr)
205 return sys_errlist[error];
207 return "Unknown error.";
216 fork_exec(struct socket *so, const char *ex, int do_pty)
218 /* not implemented */
226 slirp_openpty(amaster, aslave)
227 int *amaster, *aslave;
229 register int master, slave;
234 if ((master = open("/dev/ptmx", O_RDWR)) < 0 ||
235 grantpt(master) < 0 ||
236 unlockpt(master) < 0 ||
237 (ptr = ptsname(master)) == NULL) {
242 if ((slave = open(ptr, O_RDWR)) < 0 ||
243 ioctl(slave, I_PUSH, "ptem") < 0 ||
244 ioctl(slave, I_PUSH, "ldterm") < 0 ||
245 ioctl(slave, I_PUSH, "ttcompat") < 0) {
257 static char line[] = "/dev/ptyXX";
258 register const char *cp1, *cp2;
260 for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
262 for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
264 if ((master = open(line, O_RDWR, 0)) == -1) {
266 return (-1); /* out of ptys */
269 /* These will fail */
270 (void) chown(line, getuid(), 0);
271 (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
275 if ((slave = open(line, O_RDWR, 0)) != -1) {
280 (void) close(master);
285 errno = ENOENT; /* out of ptys */
293 * We create and bind a socket, then fork off to another
294 * process, which connects to this socket, after which we
295 * exec the wanted program. If something (strange) happens,
296 * the accept() call could block us forever.
298 * do_pty = 0 Fork/exec inetd style
299 * do_pty = 1 Fork/exec using slirp.telnetd
300 * do_ptr = 2 Fork/exec using pty
303 fork_exec(struct socket *so, const char *ex, int do_pty)
306 struct sockaddr_in addr;
307 int addrlen = sizeof(addr);
314 /* don't want to clobber the original */
319 DEBUG_CALL("fork_exec");
320 DEBUG_ARG("so = %lx", (long)so);
321 DEBUG_ARG("ex = %lx", (long)ex);
322 DEBUG_ARG("do_pty = %lx", (long)do_pty);
326 if (slirp_openpty(&master, &s) == -1) {
327 lprint("Error: openpty failed: %s\n", strerror(errno));
332 addr.sin_family = AF_INET;
334 addr.sin_addr.s_addr = INADDR_ANY;
336 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
337 bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
339 lprint("Error: inet socket: %s\n", strerror(errno));
348 lprint("Error: fork failed: %s\n", strerror(errno));
355 /* Set the DISPLAY */
357 (void) close(master);
358 #ifdef TIOCSCTTY /* XXXXX */
360 ioctl(s, TIOCSCTTY, (char *)NULL);
363 getsockname(s, (struct sockaddr *)&addr, &addrlen);
366 * Connect to the socket
367 * XXX If any of these fail, we're in trouble!
369 s = socket(AF_INET, SOCK_STREAM, 0);
370 addr.sin_addr = loopback_addr;
372 ret = connect(s, (struct sockaddr *)&addr, addrlen);
373 } while (ret < 0 && errno == EINTR);
379 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
380 setenv("DISPLAY", buff, 1);
382 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
390 for (s = getdtablesize() - 1; s >= 3; s--)
394 bptr = strdup(ex); /* No need to free() this */
396 /* Setup "slirp.telnetd -x" */
397 argv[i++] = "slirp.telnetd";
402 /* Change the string into argv[] */
404 while (*bptr != ' ' && *bptr != (char)0)
408 argv[i++] = strdup(curarg);
412 execvp(argv[0], argv);
414 /* Ooops, failed, let's tell the user why */
418 sprintf(buff, "Error: execvp of %s failed: %s\n",
419 argv[0], strerror(errno));
420 write(2, buff, strlen(buff)+1);
422 close(0); close(1); close(2); /* XXX */
431 * XXX this could block us...
432 * XXX Should set a timer here, and if accept() doesn't
433 * return after X seconds, declare it a failure
434 * The only reason this will block forever is if socket()
435 * of connect() fail in the child process
438 so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
439 } while (so->s < 0 && errno == EINTR);
442 setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
444 setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
448 /* Append the telnet options now */
449 if (so->so_m != 0 && do_pty == 1) {
450 sbappend(so, so->so_m);
466 bptr = (char *)malloc(strlen(str)+1);
479 #ifndef NO_UNIX_SOCKETS
480 struct sockaddr_un sock_un;
482 struct sockaddr_in sock_in;
486 if (slirp_socket_passwd) {
487 s = socket(AF_INET, SOCK_STREAM, 0);
490 sock_in.sin_family = AF_INET;
491 sock_in.sin_addr.s_addr = slirp_socket_addr;
492 sock_in.sin_port = htons(slirp_socket_port);
493 if (connect(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) != 0)
494 slirp_exit(1); /* just exit...*/
495 sprintf(buff, "kill %s:%d", slirp_socket_passwd, slirp_socket_unit);
496 write(s, buff, strlen(buff)+1);
498 #ifndef NO_UNIX_SOCKETS
500 s = socket(AF_UNIX, SOCK_STREAM, 0);
503 sock_un.sun_family = AF_UNIX;
504 strcpy(sock_un.sun_path, socket_path);
505 if (connect(s, (struct sockaddr *)&sock_un,
506 sizeof(sock_un.sun_family) + sizeof(sock_un.sun_path)) != 0)
508 sprintf(buff, "kill none:%d", slirp_socket_unit);
509 write(s, buff, strlen(buff)+1);
522 /* Don't need our data anymore */
523 /* XXX This makes SunOS barf */
527 for (i = 255; i >= 0; i--)
530 signal(SIGQUIT, slirp_exit);
531 signal(SIGHUP, snooze_hup);
534 /* Wait for any signal */
537 /* Just in case ... */
550 /* Don't need our data anymore */
551 /* XXX This makes SunOS barf */
554 signal(SIGQUIT, slirp_exit);
555 signal(SIGHUP, slirp_exit);
556 signal(SIGINT, slirp_exit);
557 signal(SIGTERM, slirp_exit);
559 /* Fudge to get term_raw and term_restore to work */
560 if (NULL == (ttyp = tty_attach (0, slirp_tty))) {
561 lprint ("Error: tty_attach failed in misc.c:relay()\r\n");
565 ttyp->flags |= TTY_CTTY;
574 n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
579 if (FD_ISSET(0, &readfds)) {
580 n = read(0, buf, 8192);
583 n = writen(s, buf, n);
588 if (FD_ISSET(s, &readfds)) {
589 n = read(s, buf, 8192);
592 n = writen(0, buf, n);
598 /* Just in case.... */
604 void lprint(const char *format, ...)
608 va_start(args, format);
609 term_vprintf(format, args);
613 int (*lprint_print) _P((void *, const char *, va_list));
614 char *lprint_ptr, *lprint_ptr2, **lprint_arg;
618 lprint(const char *format, ...)
620 lprint(va_alist) va_dcl
626 va_start(args, format);
630 format = va_arg(args, char *);
633 /* If we're printing to an sbuf, make sure there's enough room */
636 if ((lprint_ptr - lprint_sb->sb_wptr) >=
637 (lprint_sb->sb_datalen - (strlen(format) + 100))) {
638 int deltaw = lprint_sb->sb_wptr - lprint_sb->sb_data;
639 int deltar = lprint_sb->sb_rptr - lprint_sb->sb_data;
640 int deltap = lprint_ptr - lprint_sb->sb_data;
642 lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data,
643 lprint_sb->sb_datalen + TCP_SNDSPACE);
645 /* Adjust all values */
646 lprint_sb->sb_wptr = lprint_sb->sb_data + deltaw;
647 lprint_sb->sb_rptr = lprint_sb->sb_data + deltar;
648 lprint_ptr = lprint_sb->sb_data + deltap;
650 lprint_sb->sb_datalen += TCP_SNDSPACE;
655 lprint_ptr += (*lprint_print)(*lprint_arg, format, args);
657 /* Check if they want output to be logged to file as well */
661 * otherwise you'll get ^M all over the file
663 int len = strlen(format);
666 bptr1 = bptr2 = strdup(format);
670 memcpy(bptr1, bptr1+1, len+1);
674 vfprintf(lfd, bptr2, args);
685 u_int8_t tos = 0, emu = 0;
686 char buff1[256], buff2[256], buff4[128];
691 if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) {
692 lprint("Error: Bad arguments\r\n");
696 if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) {
698 if (sscanf(buff1, "%d", &fport) != 1) {
699 lprint("Error: Bad first argument\r\n");
704 if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) {
706 if (sscanf(buff2, "%256s", buff1) != 1) {
707 lprint("Error: Bad second argument\r\n");
713 if (strcmp(buff3, "lowdelay") == 0)
714 tos = IPTOS_LOWDELAY;
715 else if (strcmp(buff3, "throughput") == 0)
716 tos = IPTOS_THROUGHPUT;
718 lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n");
723 if (strcmp(buff1, "ftp") == 0)
725 else if (strcmp(buff1, "irc") == 0)
727 else if (strcmp(buff1, "none") == 0)
728 emu = EMU_NONE; /* ie: no emulation */
730 lprint("Error: Unknown service\r\n");
734 /* First, check that it isn't already emulated */
735 for (emup = tcpemu; emup; emup = emup->next) {
736 if (emup->lport == lport && emup->fport == fport) {
737 lprint("Error: port already emulated\r\n");
743 emup = (struct emu_t *)malloc(sizeof (struct emu_t));
744 emup->lport = (u_int16_t)lport;
745 emup->fport = (u_int16_t)fport;
751 /* And finally, mark all current sessions, if any, as being emulated */
752 for (so = tcb.so_next; so != &tcb; so = so->so_next) {
753 if ((lport && lport == ntohs(so->so_lport)) ||
754 (fport && fport == ntohs(so->so_fport))) {
762 lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport);
772 * Some BSD-derived systems have a sprintf which returns char *
776 vsprintf_len(string, format, args)
781 vsprintf(string, format, args);
782 return strlen(string);
787 sprintf_len(char *string, const char *format, ...)
789 sprintf_len(va_alist) va_dcl
794 va_start(args, format);
799 string = va_arg(args, char *);
800 format = va_arg(args, char *);
802 vsprintf(string, format, args);
803 return strlen(string);
818 t.tv_usec = usec * 1000;
820 select(0, &fdset, &fdset, &fdset, &t);
824 * Set fd blocking and non-blocking
834 ioctlsocket(fd, FIONBIO, &opt);
838 opt = fcntl(fd, F_GETFL, 0);
840 fcntl(fd, F_SETFL, opt);
851 ioctlsocket(fd, FIONBIO, &opt);
855 opt = fcntl(fd, F_GETFL, 0);
857 fcntl(fd, F_SETFL, opt);
867 rsh_exec(so,ns, user, host, args)
879 DEBUG_CALL("rsh_exec");
880 DEBUG_ARG("so = %lx", (long)so);
883 lprint("Error: pipe failed: %s\n", strerror(errno));
886 /* #ifdef HAVE_SOCKETPAIR */
888 if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) {
891 lprint("Error: openpty failed: %s\n", strerror(errno));
895 if (slirp_openpty(&fd0[0], &fd0[1]) == -1) {
898 lprint("Error: openpty failed: %s\n", strerror(errno));
905 lprint("Error: fork failed: %s\n", strerror(errno));
916 /* Set the DISPLAY */
919 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
920 setenv("DISPLAY", buff, 1);
922 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
930 for (s = 3; s <= 255; s++)
933 execlp("rsh","rsh","-l", user, host, args, NULL);
935 /* Ooops, failed, let's tell the user why */
937 sprintf(buff, "Error: execlp of %s failed: %s\n",
938 "rsh", strerror(errno));
939 write(2, buff, strlen(buff)+1);
940 close(0); close(1); close(2); /* XXX */