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;
86 #if SIZEOF_CHAR_P == 8
98 register struct quehead_32 *element = (struct quehead_32 *) a;
99 register struct quehead_32 *head = (struct quehead_32 *) b;
100 element->qh_link = head->qh_link;
101 head->qh_link = (u_int32_t)element;
102 element->qh_rlink = (u_int32_t)head;
103 ((struct quehead_32 *)(element->qh_link))->qh_rlink
104 = (u_int32_t)element;
111 register struct quehead_32 *element = (struct quehead_32 *) a;
112 ((struct quehead_32 *)(element->qh_link))->qh_rlink = element->qh_rlink;
113 ((struct quehead_32 *)(element->qh_rlink))->qh_link = element->qh_link;
114 element->qh_rlink = 0;
117 #endif /* SIZEOF_CHAR_P == 8 */
120 struct quehead *qh_link;
121 struct quehead *qh_rlink;
128 register struct quehead *element = (struct quehead *) a;
129 register struct quehead *head = (struct quehead *) b;
130 element->qh_link = head->qh_link;
131 head->qh_link = (struct quehead *)element;
132 element->qh_rlink = (struct quehead *)head;
133 ((struct quehead *)(element->qh_link))->qh_rlink
134 = (struct quehead *)element;
141 register struct quehead *element = (struct quehead *) a;
142 ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
143 ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
144 element->qh_rlink = NULL;
145 /* element->qh_link = NULL; TCP FIN1 crashes if you do this. Why ? */
152 add_exec(ex_ptr, do_pty, exec, addr, port)
153 struct ex_list **ex_ptr;
159 struct ex_list *tmp_ptr;
161 /* First, check if the port is "bound" */
162 for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
163 if (port == tmp_ptr->ex_fport && addr == tmp_ptr->ex_addr)
168 *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
169 (*ex_ptr)->ex_fport = port;
170 (*ex_ptr)->ex_addr = addr;
171 (*ex_ptr)->ex_pty = do_pty;
172 (*ex_ptr)->ex_exec = strdup(exec);
173 (*ex_ptr)->ex_next = tmp_ptr;
177 #ifndef HAVE_STRERROR
180 * For systems with no strerror
184 extern char *sys_errlist[];
190 if (error < sys_nerr)
191 return sys_errlist[error];
193 return "Unknown error.";
202 fork_exec(struct socket *so, const char *ex, int do_pty)
204 /* not implemented */
212 slirp_openpty(amaster, aslave)
213 int *amaster, *aslave;
215 register int master, slave;
220 if ((master = open("/dev/ptmx", O_RDWR)) < 0 ||
221 grantpt(master) < 0 ||
222 unlockpt(master) < 0 ||
223 (ptr = ptsname(master)) == NULL) {
228 if ((slave = open(ptr, O_RDWR)) < 0 ||
229 ioctl(slave, I_PUSH, "ptem") < 0 ||
230 ioctl(slave, I_PUSH, "ldterm") < 0 ||
231 ioctl(slave, I_PUSH, "ttcompat") < 0) {
243 static char line[] = "/dev/ptyXX";
244 register const char *cp1, *cp2;
246 for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
248 for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
250 if ((master = open(line, O_RDWR, 0)) == -1) {
252 return (-1); /* out of ptys */
255 /* These will fail */
256 (void) chown(line, getuid(), 0);
257 (void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
261 if ((slave = open(line, O_RDWR, 0)) != -1) {
266 (void) close(master);
271 errno = ENOENT; /* out of ptys */
279 * We create and bind a socket, then fork off to another
280 * process, which connects to this socket, after which we
281 * exec the wanted program. If something (strange) happens,
282 * the accept() call could block us forever.
284 * do_pty = 0 Fork/exec inetd style
285 * do_pty = 1 Fork/exec using slirp.telnetd
286 * do_ptr = 2 Fork/exec using pty
289 fork_exec(struct socket *so, const char *ex, int do_pty)
292 struct sockaddr_in addr;
293 socklen_t addrlen = sizeof(addr);
296 const char *argv[256];
300 /* don't want to clobber the original */
305 DEBUG_CALL("fork_exec");
306 DEBUG_ARG("so = %lx", (long)so);
307 DEBUG_ARG("ex = %lx", (long)ex);
308 DEBUG_ARG("do_pty = %lx", (long)do_pty);
312 if (slirp_openpty(&master, &s) == -1) {
313 lprint("Error: openpty failed: %s\n", strerror(errno));
320 addr.sin_family = AF_INET;
322 addr.sin_addr.s_addr = INADDR_ANY;
324 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
325 bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
327 lprint("Error: inet socket: %s\n", strerror(errno));
336 lprint("Error: fork failed: %s\n", strerror(errno));
343 /* Set the DISPLAY */
345 (void) close(master);
346 #ifdef TIOCSCTTY /* XXXXX */
348 ioctl(s, TIOCSCTTY, (char *)NULL);
351 getsockname(s, (struct sockaddr *)&addr, &addrlen);
354 * Connect to the socket
355 * XXX If any of these fail, we're in trouble!
357 s = socket(AF_INET, SOCK_STREAM, 0);
358 addr.sin_addr = loopback_addr;
360 ret = connect(s, (struct sockaddr *)&addr, addrlen);
361 } while (ret < 0 && errno == EINTR);
367 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
368 setenv("DISPLAY", buff, 1);
370 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
378 for (s = getdtablesize() - 1; s >= 3; s--)
382 bptr = strdup(ex); /* No need to free() this */
384 /* Setup "slirp.telnetd -x" */
385 argv[i++] = "slirp.telnetd";
390 /* Change the string into argv[] */
392 while (*bptr != ' ' && *bptr != (char)0)
396 argv[i++] = strdup(curarg);
400 execvp(argv[0], (char **)argv);
402 /* Ooops, failed, let's tell the user why */
406 snprintf(buff, sizeof(buff),
407 "Error: execvp of %s failed: %s\n",
408 argv[0], strerror(errno));
409 write(2, buff, strlen(buff)+1);
411 close(0); close(1); close(2); /* XXX */
420 * XXX this could block us...
421 * XXX Should set a timer here, and if accept() doesn't
422 * return after X seconds, declare it a failure
423 * The only reason this will block forever is if socket()
424 * of connect() fail in the child process
427 so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
428 } while (so->s < 0 && errno == EINTR);
431 setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
433 setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
437 /* Append the telnet options now */
438 if (so->so_m != 0 && do_pty == 1) {
439 sbappend(so, so->so_m);
455 bptr = (char *)malloc(strlen(str)+1);
468 #ifndef NO_UNIX_SOCKETS
469 struct sockaddr_un sock_un;
471 struct sockaddr_in sock_in;
475 if (slirp_socket_passwd) {
476 s = socket(AF_INET, SOCK_STREAM, 0);
479 sock_in.sin_family = AF_INET;
480 sock_in.sin_addr.s_addr = slirp_socket_addr;
481 sock_in.sin_port = htons(slirp_socket_port);
482 if (connect(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) != 0)
483 slirp_exit(1); /* just exit...*/
484 sprintf(buff, "kill %s:%d", slirp_socket_passwd, slirp_socket_unit);
485 write(s, buff, strlen(buff)+1);
487 #ifndef NO_UNIX_SOCKETS
489 s = socket(AF_UNIX, SOCK_STREAM, 0);
492 sock_un.sun_family = AF_UNIX;
493 strcpy(sock_un.sun_path, socket_path);
494 if (connect(s, (struct sockaddr *)&sock_un,
495 sizeof(sock_un.sun_family) + sizeof(sock_un.sun_path)) != 0)
497 sprintf(buff, "kill none:%d", slirp_socket_unit);
498 write(s, buff, strlen(buff)+1);
511 /* Don't need our data anymore */
512 /* XXX This makes SunOS barf */
516 for (i = 255; i >= 0; i--)
519 signal(SIGQUIT, slirp_exit);
520 signal(SIGHUP, snooze_hup);
523 /* Wait for any signal */
526 /* Just in case ... */
539 /* Don't need our data anymore */
540 /* XXX This makes SunOS barf */
543 signal(SIGQUIT, slirp_exit);
544 signal(SIGHUP, slirp_exit);
545 signal(SIGINT, slirp_exit);
546 signal(SIGTERM, slirp_exit);
548 /* Fudge to get term_raw and term_restore to work */
549 if (NULL == (ttyp = tty_attach (0, slirp_tty))) {
550 lprint ("Error: tty_attach failed in misc.c:relay()\r\n");
554 ttyp->flags |= TTY_CTTY;
563 n = select(s+1, &readfds, (fd_set *)0, (fd_set *)0, (struct timeval *)0);
568 if (FD_ISSET(0, &readfds)) {
569 n = read(0, buf, 8192);
572 n = writen(s, buf, n);
577 if (FD_ISSET(s, &readfds)) {
578 n = read(s, buf, 8192);
581 n = writen(0, buf, n);
587 /* Just in case.... */
593 extern void term_vprintf(const char *fmt, va_list ap);
595 void lprint(const char *format, ...)
599 va_start(args, format);
600 term_vprintf(format, args);
604 int (*lprint_print) _P((void *, const char *, va_list));
605 char *lprint_ptr, *lprint_ptr2, **lprint_arg;
609 lprint(const char *format, ...)
611 lprint(va_alist) va_dcl
617 va_start(args, format);
621 format = va_arg(args, char *);
624 /* If we're printing to an sbuf, make sure there's enough room */
627 if ((lprint_ptr - lprint_sb->sb_wptr) >=
628 (lprint_sb->sb_datalen - (strlen(format) + 100))) {
629 int deltaw = lprint_sb->sb_wptr - lprint_sb->sb_data;
630 int deltar = lprint_sb->sb_rptr - lprint_sb->sb_data;
631 int deltap = lprint_ptr - lprint_sb->sb_data;
633 lprint_sb->sb_data = (char *)realloc(lprint_sb->sb_data,
634 lprint_sb->sb_datalen + TCP_SNDSPACE);
636 /* Adjust all values */
637 lprint_sb->sb_wptr = lprint_sb->sb_data + deltaw;
638 lprint_sb->sb_rptr = lprint_sb->sb_data + deltar;
639 lprint_ptr = lprint_sb->sb_data + deltap;
641 lprint_sb->sb_datalen += TCP_SNDSPACE;
646 lprint_ptr += (*lprint_print)(*lprint_arg, format, args);
648 /* Check if they want output to be logged to file as well */
652 * otherwise you'll get ^M all over the file
654 int len = strlen(format);
657 bptr1 = bptr2 = strdup(format);
661 memcpy(bptr1, bptr1+1, len+1);
665 vfprintf(lfd, bptr2, args);
676 u_int8_t tos = 0, emu = 0;
677 char buff1[256], buff2[256], buff4[128];
682 if (sscanf(buff, "%256s %256s", buff2, buff1) != 2) {
683 lprint("Error: Bad arguments\r\n");
687 if (sscanf(buff1, "%d:%d", &lport, &fport) != 2) {
689 if (sscanf(buff1, "%d", &fport) != 1) {
690 lprint("Error: Bad first argument\r\n");
695 if (sscanf(buff2, "%128[^:]:%128s", buff1, buff3) != 2) {
697 if (sscanf(buff2, "%256s", buff1) != 1) {
698 lprint("Error: Bad second argument\r\n");
704 if (strcmp(buff3, "lowdelay") == 0)
705 tos = IPTOS_LOWDELAY;
706 else if (strcmp(buff3, "throughput") == 0)
707 tos = IPTOS_THROUGHPUT;
709 lprint("Error: Expecting \"lowdelay\"/\"throughput\"\r\n");
714 if (strcmp(buff1, "ftp") == 0)
716 else if (strcmp(buff1, "irc") == 0)
718 else if (strcmp(buff1, "none") == 0)
719 emu = EMU_NONE; /* ie: no emulation */
721 lprint("Error: Unknown service\r\n");
725 /* First, check that it isn't already emulated */
726 for (emup = tcpemu; emup; emup = emup->next) {
727 if (emup->lport == lport && emup->fport == fport) {
728 lprint("Error: port already emulated\r\n");
734 emup = (struct emu_t *)malloc(sizeof (struct emu_t));
735 emup->lport = (u_int16_t)lport;
736 emup->fport = (u_int16_t)fport;
742 /* And finally, mark all current sessions, if any, as being emulated */
743 for (so = tcb.so_next; so != &tcb; so = so->so_next) {
744 if ((lport && lport == ntohs(so->so_lport)) ||
745 (fport && fport == ntohs(so->so_fport))) {
753 lprint("Adding emulation for %s to port %d/%d\r\n", buff1, emup->lport, emup->fport);
763 * Some BSD-derived systems have a sprintf which returns char *
767 vsprintf_len(string, format, args)
772 vsprintf(string, format, args);
773 return strlen(string);
778 sprintf_len(char *string, const char *format, ...)
780 sprintf_len(va_alist) va_dcl
785 va_start(args, format);
790 string = va_arg(args, char *);
791 format = va_arg(args, char *);
793 vsprintf(string, format, args);
794 return strlen(string);
809 t.tv_usec = usec * 1000;
811 select(0, &fdset, &fdset, &fdset, &t);
815 * Set fd blocking and non-blocking
825 ioctlsocket(fd, FIONBIO, &opt);
829 opt = fcntl(fd, F_GETFL, 0);
831 fcntl(fd, F_SETFL, opt);
842 ioctlsocket(fd, FIONBIO, &opt);
846 opt = fcntl(fd, F_GETFL, 0);
848 fcntl(fd, F_SETFL, opt);
858 rsh_exec(so,ns, user, host, args)
870 DEBUG_CALL("rsh_exec");
871 DEBUG_ARG("so = %lx", (long)so);
874 lprint("Error: pipe failed: %s\n", strerror(errno));
877 /* #ifdef HAVE_SOCKETPAIR */
879 if (socketpair(PF_UNIX,SOCK_STREAM,0, fd0) == -1) {
882 lprint("Error: openpty failed: %s\n", strerror(errno));
886 if (slirp_openpty(&fd0[0], &fd0[1]) == -1) {
889 lprint("Error: openpty failed: %s\n", strerror(errno));
896 lprint("Error: fork failed: %s\n", strerror(errno));
907 /* Set the DISPLAY */
910 sprintf(buff, "%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
911 setenv("DISPLAY", buff, 1);
913 sprintf(buff, "DISPLAY=%s:%d.%d", inet_ntoa(our_addr), x_port, x_screen);
921 for (s = 3; s <= 255; s++)
924 execlp("rsh","rsh","-l", user, host, args, NULL);
926 /* Ooops, failed, let's tell the user why */
928 sprintf(buff, "Error: execlp of %s failed: %s\n",
929 "rsh", strerror(errno));
930 write(2, buff, strlen(buff)+1);
931 close(0); close(1); close(2); /* XXX */