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");
70 * Get our IP address and put it in our_addr
76 struct hostent *he = NULL;
78 if (gethostname(buff,256) == 0)
79 he = gethostbyname(buff);
81 our_addr = *(struct in_addr *)he->h_addr;
82 if (our_addr.s_addr == 0)
83 our_addr.s_addr = loopback_addr.s_addr;
87 struct quehead *qh_link;
88 struct quehead *qh_rlink;
95 register struct quehead *element = (struct quehead *) a;
96 register struct quehead *head = (struct quehead *) b;
97 element->qh_link = head->qh_link;
98 head->qh_link = (struct quehead *)element;
99 element->qh_rlink = (struct quehead *)head;
100 ((struct quehead *)(element->qh_link))->qh_rlink
101 = (struct quehead *)element;
108 register struct quehead *element = (struct quehead *) a;
109 ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
110 ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
111 element->qh_rlink = NULL;
112 /* element->qh_link = NULL; TCP FIN1 crashes if you do this. Why ? */
119 add_exec(ex_ptr, do_pty, exec, addr, port)
120 struct ex_list **ex_ptr;
126 struct ex_list *tmp_ptr;
128 /* First, check if the port is "bound" */
129 for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
130 if (port == tmp_ptr->ex_fport && addr == tmp_ptr->ex_addr)
135 *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
136 (*ex_ptr)->ex_fport = port;
137 (*ex_ptr)->ex_addr = addr;
138 (*ex_ptr)->ex_pty = do_pty;
139 (*ex_ptr)->ex_exec = (do_pty == 3) ? exec : strdup(exec);
140 (*ex_ptr)->ex_next = tmp_ptr;
144 #ifndef HAVE_STRERROR
147 * For systems with no strerror
151 extern char *sys_errlist[];
157 if (error < sys_nerr)
158 return sys_errlist[error];
160 return "Unknown error.";
169 fork_exec(struct socket *so, const char *ex, int do_pty)
171 /* not implemented */
179 slirp_openpty(amaster, aslave)
180 int *amaster, *aslave;
182 register int master, slave;
187 if ((master = open("/dev/ptmx", O_RDWR)) < 0 ||
188 grantpt(master) < 0 ||
189 unlockpt(master) < 0 ||
190 (ptr = ptsname(master)) == NULL) {
195 if ((slave = open(ptr, O_RDWR)) < 0 ||
196 ioctl(slave, I_PUSH, "ptem") < 0 ||
197 ioctl(slave, I_PUSH, "ldterm") < 0 ||
198 ioctl(slave, I_PUSH, "ttcompat") < 0) {
210 static char line[] = "/dev/ptyXX";
211 register const char *cp1, *cp2;
213 for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
215 for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
217 if ((master = open(line, O_RDWR, 0)) == -1) {
219 return (-1); /* out of ptys */
222 /* These will fail */
223 (void) chown(line, getuid(), 0);
224 (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
228 if ((slave = open(line, O_RDWR, 0)) != -1) {
233 (void) close(master);
238 errno = ENOENT; /* out of ptys */
246 * We create and bind a socket, then fork off to another
247 * process, which connects to this socket, after which we
248 * exec the wanted program. If something (strange) happens,
249 * the accept() call could block us forever.
251 * do_pty = 0 Fork/exec inetd style
252 * do_pty = 1 Fork/exec using slirp.telnetd
253 * do_ptr = 2 Fork/exec using pty
256 fork_exec(struct socket *so, const char *ex, int do_pty)
259 struct sockaddr_in addr;
260 socklen_t addrlen = sizeof(addr);
263 const char *argv[256];
267 /* don't want to clobber the original */
272 DEBUG_CALL("fork_exec");
273 DEBUG_ARG("so = %lx", (long)so);
274 DEBUG_ARG("ex = %lx", (long)ex);
275 DEBUG_ARG("do_pty = %lx", (long)do_pty);
279 if (slirp_openpty(&master, &s) == -1) {
280 lprint("Error: openpty failed: %s\n", strerror(errno));
287 addr.sin_family = AF_INET;
289 addr.sin_addr.s_addr = INADDR_ANY;
291 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
292 bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
294 lprint("Error: inet socket: %s\n", strerror(errno));
303 lprint("Error: fork failed: %s\n", strerror(errno));
310 /* Set the DISPLAY */
312 (void) close(master);
313 #ifdef TIOCSCTTY /* XXXXX */
315 ioctl(s, TIOCSCTTY, (char *)NULL);
318 getsockname(s, (struct sockaddr *)&addr, &addrlen);
321 * Connect to the socket
322 * XXX If any of these fail, we're in trouble!
324 s = socket(AF_INET, SOCK_STREAM, 0);
325 addr.sin_addr = loopback_addr;
327 ret = connect(s, (struct sockaddr *)&addr, addrlen);
328 } while (ret < 0 && errno == EINTR);
334 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
335 setenv("DISPLAY", buff, 1);
337 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
345 for (s = getdtablesize() - 1; s >= 3; s--)
349 bptr = strdup(ex); /* No need to free() this */
351 /* Setup "slirp.telnetd -x" */
352 argv[i++] = "slirp.telnetd";
357 /* Change the string into argv[] */
359 while (*bptr != ' ' && *bptr != (char)0)
363 argv[i++] = strdup(curarg);
367 execvp(argv[0], (char **)argv);
369 /* Ooops, failed, let's tell the user why */
373 snprintf(buff, sizeof(buff),
374 "Error: execvp of %s failed: %s\n",
375 argv[0], strerror(errno));
376 write(2, buff, strlen(buff)+1);
378 close(0); close(1); close(2); /* XXX */
387 * XXX this could block us...
388 * XXX Should set a timer here, and if accept() doesn't
389 * return after X seconds, declare it a failure
390 * The only reason this will block forever is if socket()
391 * of connect() fail in the child process
394 so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
395 } while (so->s < 0 && errno == EINTR);
398 setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
400 setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
404 /* Append the telnet options now */
405 if (so->so_m != 0 && do_pty == 1) {
406 sbappend(so, so->so_m);
422 bptr = (char *)malloc(strlen(str)+1);
435 #ifndef NO_UNIX_SOCKETS
436 struct sockaddr_un sock_un;
438 struct sockaddr_in sock_in;
442 if (slirp_socket_passwd) {
443 s = socket(AF_INET, SOCK_STREAM, 0);
446 sock_in.sin_family = AF_INET;
447 sock_in.sin_addr.s_addr = slirp_socket_addr;
448 sock_in.sin_port = htons(slirp_socket_port);
449 if (connect(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) != 0)
450 slirp_exit(1); /* just exit...*/
451 sprintf(buff, "kill %s:%d", slirp_socket_passwd, slirp_socket_unit);
452 write(s, buff, strlen(buff)+1);
454 #ifndef NO_UNIX_SOCKETS
456 s = socket(AF_UNIX, SOCK_STREAM, 0);
459 sock_un.sun_family = AF_UNIX;
460 strcpy(sock_un.sun_path, socket_path);
461 if (connect(s, (struct sockaddr *)&sock_un,
462 sizeof(sock_un.sun_family) + sizeof(sock_un.sun_path)) != 0)
464 sprintf(buff, "kill none:%d", slirp_socket_unit);
465 write(s, buff, strlen(buff)+1);
478 /* Don't need our data anymore */
479 /* XXX This makes SunOS barf */
483 for (i = 255; i >= 0; i--)
486 signal(SIGQUIT, slirp_exit);
487 signal(SIGHUP, snooze_hup);
490 /* Wait for any signal */
493 /* Just in case ... */
506 /* Don't need our data anymore */
507 /* XXX This makes SunOS barf */
510 signal(SIGQUIT, slirp_exit);
511 signal(SIGHUP, slirp_exit);
512 signal(SIGINT, slirp_exit);
513 signal(SIGTERM, slirp_exit);
515 /* Fudge to get term_raw and term_restore to work */
516 if (NULL == (ttyp = tty_attach (0, slirp_tty))) {
517 lprint ("Error: tty_attach failed in misc.c:relay()\r\n");
521 ttyp->flags |= TTY_CTTY;
530 n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
535 if (FD_ISSET(0, &readfds)) {
536 n = read(0, buf, 8192);
539 n = writen(s, buf, n);
544 if (FD_ISSET(s, &readfds)) {
545 n = read(s, buf, 8192);
548 n = writen(0, buf, n);
554 /* Just in case.... */
560 extern void term_vprintf(const char *fmt, va_list ap);
562 void lprint(const char *format, ...)
566 va_start(args, format);
567 term_vprintf(format, args);
571 int (*lprint_print) _P((void *, const char *, va_list));
572 char *lprint_ptr, *lprint_ptr2, **lprint_arg;
576 lprint(const char *format, ...)
578 lprint(va_alist) va_dcl
584 va_start(args, format);
588 format = va_arg(args, char *);
591 /* If we're printing to an sbuf, make sure there's enough room */
594 if ((lprint_ptr - lprint_sb->sb_wptr) >=
595 (lprint_sb->sb_datalen - (strlen(format) + 100))) {
596 int deltaw = lprint_sb->sb_wptr - lprint_sb->sb_data;
597 int deltar = lprint_sb->sb_rptr - lprint_sb->sb_data;
598 int deltap = lprint_ptr - lprint_sb->sb_data;
600 lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data,
601 lprint_sb->sb_datalen + TCP_SNDSPACE);
603 /* Adjust all values */
604 lprint_sb->sb_wptr = lprint_sb->sb_data + deltaw;
605 lprint_sb->sb_rptr = lprint_sb->sb_data + deltar;
606 lprint_ptr = lprint_sb->sb_data + deltap;
608 lprint_sb->sb_datalen += TCP_SNDSPACE;
613 lprint_ptr += (*lprint_print)(*lprint_arg, format, args);
615 /* Check if they want output to be logged to file as well */
619 * otherwise you'll get ^M all over the file
621 int len = strlen(format);
624 bptr1 = bptr2 = strdup(format);
628 memcpy(bptr1, bptr1+1, len+1);
632 vfprintf(lfd, bptr2, args);
643 u_int8_t tos = 0, emu = 0;
644 char buff1[256], buff2[256], buff4[128];
649 if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) {
650 lprint("Error: Bad arguments\r\n");
654 if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) {
656 if (sscanf(buff1, "%d", &fport) != 1) {
657 lprint("Error: Bad first argument\r\n");
662 if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) {
664 if (sscanf(buff2, "%256s", buff1) != 1) {
665 lprint("Error: Bad second argument\r\n");
671 if (strcmp(buff3, "lowdelay") == 0)
672 tos = IPTOS_LOWDELAY;
673 else if (strcmp(buff3, "throughput") == 0)
674 tos = IPTOS_THROUGHPUT;
676 lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n");
681 if (strcmp(buff1, "ftp") == 0)
683 else if (strcmp(buff1, "irc") == 0)
685 else if (strcmp(buff1, "none") == 0)
686 emu = EMU_NONE; /* ie: no emulation */
688 lprint("Error: Unknown service\r\n");
692 /* First, check that it isn't already emulated */
693 for (emup = tcpemu; emup; emup = emup->next) {
694 if (emup->lport == lport && emup->fport == fport) {
695 lprint("Error: port already emulated\r\n");
701 emup = (struct emu_t *)malloc(sizeof (struct emu_t));
702 emup->lport = (u_int16_t)lport;
703 emup->fport = (u_int16_t)fport;
709 /* And finally, mark all current sessions, if any, as being emulated */
710 for (so = tcb.so_next; so != &tcb; so = so->so_next) {
711 if ((lport && lport == ntohs(so->so_lport)) ||
712 (fport && fport == ntohs(so->so_fport))) {
720 lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport);
730 * Some BSD-derived systems have a sprintf which returns char *
734 vsprintf_len(string, format, args)
739 vsprintf(string, format, args);
740 return strlen(string);
745 sprintf_len(char *string, const char *format, ...)
747 sprintf_len(va_alist) va_dcl
752 va_start(args, format);
757 string = va_arg(args, char *);
758 format = va_arg(args, char *);
760 vsprintf(string, format, args);
761 return strlen(string);
776 t.tv_usec = usec * 1000;
778 select(0, &fdset, &fdset, &fdset, &t);
782 * Set fd blocking and non-blocking
792 ioctlsocket(fd, FIONBIO, &opt);
796 opt = fcntl(fd, F_GETFL, 0);
798 fcntl(fd, F_SETFL, opt);
809 ioctlsocket(fd, FIONBIO, &opt);
813 opt = fcntl(fd, F_GETFL, 0);
815 fcntl(fd, F_SETFL, opt);
825 rsh_exec(so,ns, user, host, args)
837 DEBUG_CALL("rsh_exec");
838 DEBUG_ARG("so = %lx", (long)so);
841 lprint("Error: pipe failed: %s\n", strerror(errno));
844 /* #ifdef HAVE_SOCKETPAIR */
846 if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) {
849 lprint("Error: openpty failed: %s\n", strerror(errno));
853 if (slirp_openpty(&fd0[0], &fd0[1]) == -1) {
856 lprint("Error: openpty failed: %s\n", strerror(errno));
863 lprint("Error: fork failed: %s\n", strerror(errno));
874 /* Set the DISPLAY */
877 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
878 setenv("DISPLAY", buff, 1);
880 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
888 for (s = 3; s <= 255; s++)
891 execlp("rsh","rsh","-l", user, host, args, NULL);
893 /* Ooops, failed, let's tell the user why */
895 sprintf(buff, "Error: execlp of %s failed: %s\n",
896 "rsh", strerror(errno));
897 write(2, buff, strlen(buff)+1);
898 close(0); close(1); close(2); /* XXX */