1 /* $KAME: rsh.c,v 1.7 2001/09/05 01:10:30 itojun Exp $ */
4 * Copyright (C) 1997 and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $FreeBSD: src/usr.sbin/faithd/rsh.c,v 1.2.2.4 2002/04/28 05:40:29 suz Exp $
32 * $DragonFly: src/usr.sbin/faithd/rsh.c,v 1.2 2003/06/17 04:29:53 dillon Exp $
35 #include <sys/param.h>
36 #include <sys/types.h>
37 #include <sys/socket.h>
38 #include <sys/ioctl.h>
48 #include <netinet/in.h>
49 #include <arpa/inet.h>
56 int s_ctl, s_ctl6, s_rcv, s_snd;
60 rsh_relay(int s_src, int s_dst)
68 FD_SET(s_src, &readfds);
69 tv.tv_sec = FAITH_TIMEOUT;
71 error = select(256, &readfds, NULL, NULL, &tv);
73 exit_failure("select %d: %s", s_src, strerror(errno));
75 exit_failure("connection timeout");
77 n = read(s_src, rshbuf, sizeof(rshbuf));
79 rsh_dual_relay(s_src, s_dst);
82 write(s_dst, rshbuf, n);
83 tcp_relay(s_src, s_dst, "rsh");
88 relay(int src, int dst)
94 error = ioctl(s_rcv, SIOCATMARK, &atmark);
95 if (error != -1 && atmark == 1) {
96 n = read(s_rcv, rshbuf, 1);
98 send(s_snd, rshbuf, 1, MSG_OOB);
102 n = read(s_rcv, rshbuf, sizeof(rshbuf));
106 exit_failure("%s", strerror(errno));
118 exit_success("terminating rsh/contorol connections");
121 write(s_snd, rshbuf, n);
126 rsh_dual_relay(int s_src, int s_dst)
129 int len, s_wld, error;
130 struct sockaddr_storage ctladdr6;
131 struct sockaddr_storage ctladdr;
132 int port6 = 0, lport, lport6;
140 syslog(LOG_INFO, "starting rsh connection");
142 for (p = rshbuf; *p; p++)
143 port6 = port6 * 10 + *p - '0';
145 len = sizeof(ctladdr6);
146 getpeername(s_src, (struct sockaddr *)&ctladdr6, &len);
147 if (((struct sockaddr *)&ctladdr6)->sa_family == AF_INET6)
148 ((struct sockaddr_in6 *)&ctladdr6)->sin6_port = htons(port6);
150 ((struct sockaddr_in *)&ctladdr6)->sin_port = htons(port6);
152 s_wld = rresvport(&lport);
153 if (s_wld == -1) goto bad;
154 error = listen(s_wld, 1);
155 if (error == -1) goto bad;
156 snprintf(rshbuf, sizeof(rshbuf), "%d", lport);
157 write(s_dst, rshbuf, strlen(rshbuf)+1);
159 len = sizeof(ctladdr);
160 s_ctl = accept(s_wld, (struct sockaddr *)&ctladdr, &len);
161 if (s_ctl == -1) goto bad;
164 sa = (struct sockaddr *)&ctladdr6;
165 s_ctl6 = rresvport_af(&lport6, sa->sa_family);
166 if (s_ctl6 == -1) goto bad;
167 error = connect(s_ctl6, sa, sa->sa_len);
168 if (error == -1) goto bad;
170 syslog(LOG_INFO, "starting rsh control connection");
175 FD_SET(s_src, &readfds);
176 FD_SET(s_dst, &readfds);
177 FD_SET(s_ctl, &readfds);
178 FD_SET(s_ctl6, &readfds);
179 tv.tv_sec = FAITH_TIMEOUT;
182 error = select(256, &readfds, NULL, NULL, &tv);
184 exit_failure("select 4 sockets: %s", strerror(errno));
186 exit_failure("connection timeout");
188 if (half == NO && FD_ISSET(s_src, &readfds)) {
193 if (FD_ISSET(s_dst, &readfds)) {
198 if (FD_ISSET(s_ctl, &readfds)) {
203 if (FD_ISSET(s_ctl6, &readfds)) {
212 exit_failure("%s", strerror(errno));