2 * Copyright (c) 1995 Danny Gasparovski.
4 * Please read the file COPYRIGHT for the
5 * terms and conditions of the copyright.
14 int slirp_debug = DBG_CALL|DBG_MISC|DBG_ERROR;
18 struct quehead *qh_link;
19 struct quehead *qh_rlink;
23 insque(void *a, void *b)
25 register struct quehead *element = (struct quehead *) a;
26 register struct quehead *head = (struct quehead *) b;
27 element->qh_link = head->qh_link;
28 head->qh_link = (struct quehead *)element;
29 element->qh_rlink = (struct quehead *)head;
30 ((struct quehead *)(element->qh_link))->qh_rlink
31 = (struct quehead *)element;
37 register struct quehead *element = (struct quehead *) a;
38 ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
39 ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
40 element->qh_rlink = NULL;
43 int add_exec(struct ex_list **ex_ptr, int do_pty, char *exec,
44 struct in_addr addr, int port)
46 struct ex_list *tmp_ptr;
48 /* First, check if the port is "bound" */
49 for (tmp_ptr = *ex_ptr; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
50 if (port == tmp_ptr->ex_fport &&
51 addr.s_addr == tmp_ptr->ex_addr.s_addr)
56 *ex_ptr = (struct ex_list *)malloc(sizeof(struct ex_list));
57 (*ex_ptr)->ex_fport = port;
58 (*ex_ptr)->ex_addr = addr;
59 (*ex_ptr)->ex_pty = do_pty;
60 (*ex_ptr)->ex_exec = (do_pty == 3) ? exec : strdup(exec);
61 (*ex_ptr)->ex_next = tmp_ptr;
68 * For systems with no strerror
72 extern char *sys_errlist[];
79 return sys_errlist[error];
81 return "Unknown error.";
90 fork_exec(struct socket *so, const char *ex, int do_pty)
100 * We create and bind a socket, then fork off to another
101 * process, which connects to this socket, after which we
102 * exec the wanted program. If something (strange) happens,
103 * the accept() call could block us forever.
105 * do_pty = 0 Fork/exec inetd style
106 * do_pty = 1 Fork/exec using slirp.telnetd
107 * do_ptr = 2 Fork/exec using pty
110 fork_exec(struct socket *so, const char *ex, int do_pty)
113 struct sockaddr_in addr;
114 socklen_t addrlen = sizeof(addr);
117 const char *argv[256];
118 /* don't want to clobber the original */
124 DEBUG_CALL("fork_exec");
125 DEBUG_ARG("so = %lx", (long)so);
126 DEBUG_ARG("ex = %lx", (long)ex);
127 DEBUG_ARG("do_pty = %lx", (long)do_pty);
132 addr.sin_family = AF_INET;
134 addr.sin_addr.s_addr = INADDR_ANY;
136 if ((s = qemu_socket(AF_INET, SOCK_STREAM, 0)) < 0 ||
137 bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
139 lprint("Error: inet socket: %s\n", strerror(errno));
149 lprint("Error: fork failed: %s\n", strerror(errno));
158 /* Set the DISPLAY */
160 (void) close(master);
161 #ifdef TIOCSCTTY /* XXXXX */
162 ioctl(s, TIOCSCTTY, (char *)NULL);
165 getsockname(s, (struct sockaddr *)&addr, &addrlen);
168 * Connect to the socket
169 * XXX If any of these fail, we're in trouble!
171 s = qemu_socket(AF_INET, SOCK_STREAM, 0);
172 addr.sin_addr = loopback_addr;
174 ret = connect(s, (struct sockaddr *)&addr, addrlen);
175 } while (ret < 0 && errno == EINTR);
181 for (s = getdtablesize() - 1; s >= 3; s--)
185 bptr = qemu_strdup(ex); /* No need to free() this */
187 /* Setup "slirp.telnetd -x" */
188 argv[i++] = "slirp.telnetd";
193 /* Change the string into argv[] */
195 while (*bptr != ' ' && *bptr != (char)0)
199 argv[i++] = strdup(curarg);
203 execvp(argv[0], (char **)argv);
205 /* Ooops, failed, let's tell the user why */
206 fprintf(stderr, "Error: execvp of %s failed: %s\n",
207 argv[0], strerror(errno));
208 close(0); close(1); close(2); /* XXX */
212 qemu_add_child_watch(pid);
218 * XXX this could block us...
219 * XXX Should set a timer here, and if accept() doesn't
220 * return after X seconds, declare it a failure
221 * The only reason this will block forever is if socket()
222 * of connect() fail in the child process
225 so->s = accept(s, (struct sockaddr *)&addr, &addrlen);
226 } while (so->s < 0 && errno == EINTR);
229 setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
231 setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
235 /* Append the telnet options now */
236 if (so->so_m != NULL && do_pty == 1) {
237 sbappend(so, so->so_m);
253 bptr = (char *)malloc(strlen(str)+1);
262 void lprint(const char *format, ...)
266 va_start(args, format);
267 monitor_vprintf(default_mon, format, args);
280 t.tv_usec = usec * 1000;
282 select(0, &fdset, &fdset, &fdset, &t);
286 * Set fd blocking and non-blocking
294 unsigned long opt = 1;
299 ioctlsocket(fd, FIONBIO, &opt);
303 opt = fcntl(fd, F_GETFL, 0);
305 fcntl(fd, F_SETFL, opt);
314 unsigned long opt = 0;
319 ioctlsocket(fd, FIONBIO, &opt);
323 opt = fcntl(fd, F_GETFL, 0);
325 fcntl(fd, F_SETFL, opt);
329 void slirp_connection_info(Slirp *slirp, Monitor *mon)
331 const char * const tcpstates[] = {
332 [TCPS_CLOSED] = "CLOSED",
333 [TCPS_LISTEN] = "LISTEN",
334 [TCPS_SYN_SENT] = "SYN_SENT",
335 [TCPS_SYN_RECEIVED] = "SYN_RCVD",
336 [TCPS_ESTABLISHED] = "ESTABLISHED",
337 [TCPS_CLOSE_WAIT] = "CLOSE_WAIT",
338 [TCPS_FIN_WAIT_1] = "FIN_WAIT_1",
339 [TCPS_CLOSING] = "CLOSING",
340 [TCPS_LAST_ACK] = "LAST_ACK",
341 [TCPS_FIN_WAIT_2] = "FIN_WAIT_2",
342 [TCPS_TIME_WAIT] = "TIME_WAIT",
344 struct in_addr dst_addr;
345 struct sockaddr_in src;
353 monitor_printf(mon, " Protocol[State] FD Source Address Port "
354 "Dest. Address Port RecvQ SendQ\n");
356 for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
357 if (so->so_state & SS_HOSTFWD) {
358 state = "HOST_FORWARD";
359 } else if (so->so_tcpcb) {
360 state = tcpstates[so->so_tcpcb->t_state];
364 if (so->so_state & (SS_HOSTFWD | SS_INCOMING)) {
365 src_len = sizeof(src);
366 getsockname(so->s, (struct sockaddr *)&src, &src_len);
367 dst_addr = so->so_laddr;
368 dst_port = so->so_lport;
370 src.sin_addr = so->so_laddr;
371 src.sin_port = so->so_lport;
372 dst_addr = so->so_faddr;
373 dst_port = so->so_fport;
375 n = snprintf(buf, sizeof(buf), " TCP[%s]", state);
376 memset(&buf[n], ' ', 19 - n);
378 monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
379 src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
380 ntohs(src.sin_port));
381 monitor_printf(mon, "%15s %5d %5d %5d\n",
382 inet_ntoa(dst_addr), ntohs(dst_port),
383 so->so_rcv.sb_cc, so->so_snd.sb_cc);
386 for (so = slirp->udb.so_next; so != &slirp->udb; so = so->so_next) {
387 if (so->so_state & SS_HOSTFWD) {
388 n = snprintf(buf, sizeof(buf), " UDP[HOST_FORWARD]");
389 src_len = sizeof(src);
390 getsockname(so->s, (struct sockaddr *)&src, &src_len);
391 dst_addr = so->so_laddr;
392 dst_port = so->so_lport;
394 n = snprintf(buf, sizeof(buf), " UDP[%d sec]",
395 (so->so_expire - curtime) / 1000);
396 src.sin_addr = so->so_laddr;
397 src.sin_port = so->so_lport;
398 dst_addr = so->so_faddr;
399 dst_port = so->so_fport;
401 memset(&buf[n], ' ', 19 - n);
403 monitor_printf(mon, "%s %3d %15s %5d ", buf, so->s,
404 src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*",
405 ntohs(src.sin_port));
406 monitor_printf(mon, "%15s %5d %5d %5d\n",
407 inet_ntoa(dst_addr), ntohs(dst_port),
408 so->so_rcv.sb_cc, so->so_snd.sb_cc);
411 for (so = slirp->icmp.so_next; so != &slirp->icmp; so = so->so_next) {
412 n = snprintf(buf, sizeof(buf), " ICMP[%d sec]",
413 (so->so_expire - curtime) / 1000);
414 src.sin_addr = so->so_laddr;
415 dst_addr = so->so_faddr;
416 memset(&buf[n], ' ', 19 - n);
418 monitor_printf(mon, "%s %3d %15s - ", buf, so->s,
419 src.sin_addr.s_addr ? inet_ntoa(src.sin_addr) : "*");
420 monitor_printf(mon, "%15s - %5d %5d\n", inet_ntoa(dst_addr),
421 so->so_rcv.sb_cc, so->so_snd.sb_cc);