faith translator deamon, from KAME

1 files changed, 208 insertions, 0 deletions

diff --git a/usr.sbin/faithd/rsh.c b/usr.sbin/faithd/rsh.c
new file mode 100644
index 00000000000..8dc0ead6a84
--- /dev/null
+++ b/usr.sbin/faithd/rsh.c
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 1997 and 1998 WIDE Project.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include "faithd.h"
+
+char rshbuf[MSS];
+
+int s_ctl, s_ctl6, s_rcv, s_snd;
+int half;
+
+void
+rsh_relay(int s_src, int s_dst)
+{
+	ssize_t n;
+	fd_set readfds;
+	int error;
+	struct timeval tv;
+
+	FD_ZERO(&readfds);
+	FD_SET(s_src, &readfds);
+	tv.tv_sec = FAITH_TIMEOUT;
+	tv.tv_usec = 0;
+	error = select(256, &readfds, NULL, NULL, &tv);
+	if (error == -1)
+		exit_failure("select %d: %s", s_src, ERRSTR);
+	else if (error == 0)
+		exit_failure("connecion timeout");
+
+	n = read(s_src, rshbuf, sizeof(rshbuf));
+	if (rshbuf[0] != 0) {
+		rsh_dual_relay(s_src, s_dst);
+		/* NOTREACHED */
+	}
+	write(s_dst, rshbuf, n);
+	tcp_relay(s_src, s_dst, "rsh");
+		/* NOTREACHED */
+}
+
+static void
+relay(int src, int dst)
+{
+	int error;
+	ssize_t n;	
+	int atmark;
+
+	error = ioctl(s_rcv, SIOCATMARK, &atmark);
+	if (error != -1 && atmark == 1) {
+		n = read(s_rcv, rshbuf, 1);
+		if (n == 1)
+			send(s_snd, rshbuf, 1, MSG_OOB);
+		return;
+	}
+
+	n = read(s_rcv, rshbuf, sizeof(rshbuf));
+
+	switch (n) {
+	case -1:
+		exit_failure(ERRSTR);
+	case 0:
+		if (s_rcv == src) {
+			/* half close */
+			shutdown(dst, 1);
+			half = YES;
+			break;
+		}
+		close(src);
+		close(dst);
+		close(s_ctl);
+		close(s_ctl6);			
+		exit_success("terminating rsh/contorol connections");
+		break;
+	default:
+		write(s_snd, rshbuf, n);
+	}
+}
+
+void
+rsh_dual_relay(int s_src, int s_dst)
+{
+	fd_set readfds;
+	int len, s_wld, error;
+	struct sockaddr_storage ctladdr6;
+	struct sockaddr_storage ctladdr;
+	int port6 = 0, lport, lport6;
+	char *p;
+	struct timeval tv;
+	struct sockaddr *sa;
+
+	half = NO;
+	s_rcv = s_src;
+	s_snd = s_dst;
+	syslog(LOG_INFO, "starting rsh connection");
+
+	for (p = rshbuf; *p; p++)
+		port6 = port6 * 10 + *p - '0';
+
+	len = sizeof(ctladdr6);
+	getpeername(s_src, (struct sockaddr *)&ctladdr6, &len);
+	if (((struct sockaddr *)&ctladdr6)->sa_family == AF_INET6)
+		((struct sockaddr_in6 *)&ctladdr6)->sin6_port = htons(port6);
+	else
+		((struct sockaddr_in *)&ctladdr6)->sin_port = htons(port6);
+
+	s_wld = rresvport(&lport);
+	if (s_wld == -1) goto bad;
+	error = listen(s_wld, 1);
+	if (error == -1) goto bad;
+	snprintf(rshbuf, sizeof(rshbuf), "%d", lport);
+	write(s_dst, rshbuf, strlen(rshbuf)+1);
+
+	len = sizeof(ctladdr);
+	s_ctl = accept(s_wld, (struct sockaddr *)&ctladdr, &len);
+	if (s_ctl == -1) goto bad;
+	close(s_wld);
+	
+	sa = (struct sockaddr *)&ctladdr6;
+	s_ctl6 = rresvport_af(&lport6, sa->sa_family);
+	if (s_ctl6 == -1) goto bad;
+	error = connect(s_ctl6, sa, sa->sa_len);
+	if (error == -1) goto bad;
+	
+	syslog(LOG_INFO, "starting rsh control connection");
+
+	for (;;) {
+		FD_ZERO(&readfds);
+		if (half == NO)
+			FD_SET(s_src, &readfds);
+		FD_SET(s_dst, &readfds);
+		FD_SET(s_ctl, &readfds);
+		FD_SET(s_ctl6, &readfds);
+		tv.tv_sec = FAITH_TIMEOUT;
+		tv.tv_usec = 0;
+
+		error = select(256, &readfds, NULL, NULL, &tv);
+		if (error == -1)
+			exit_failure("select 4 sockets: %s", ERRSTR);
+		else if (error == 0)
+			exit_failure("connecion timeout");
+
+		if (half == NO && FD_ISSET(s_src, &readfds)) {
+			s_rcv = s_src;
+			s_snd = s_dst;
+			relay(s_src, s_dst);
+		}
+		if (FD_ISSET(s_dst, &readfds)) {
+			s_rcv = s_dst;
+			s_snd = s_src;
+			relay(s_src, s_dst);
+		}
+		if (FD_ISSET(s_ctl, &readfds)) {
+			s_rcv = s_ctl;
+			s_snd = s_ctl6;
+			relay(s_src, s_dst);
+		}
+		if (FD_ISSET(s_ctl6, &readfds)) {
+			s_rcv = s_ctl6;
+			s_snd = s_ctl;
+			relay(s_src, s_dst);
+		}
+	}
+	/* NOTREACHED */
+
+ bad:
+	exit_failure(ERRSTR);
+}