1 files changed, 31 insertions, 27 deletions

diff --git a/crypto/openssh/misc.c b/crypto/openssh/misc.c
index ddd2b2d..de7e1fa 100644
--- a/crypto/openssh/misc.c
+++ b/crypto/openssh/misc.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: misc.c,v 1.97 2015/04/24 01:36:00 deraadt Exp $ */
+/* $OpenBSD: misc.c,v 1.101 2016/01/20 09:22:39 dtucker Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  * Copyright (c) 2005,2006 Damien Miller.  All rights reserved.
@@ -29,6 +29,7 @@
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
+#include <sys/time.h>
 #include <sys/un.h>
 
 #include <limits.h>
@@ -604,6 +605,8 @@ percent_expand(const char *string, ...)
 		/* %% case */
 		if (*string == '%')
 			goto append;
+		if (*string == '\0')
+			fatal("%s: invalid format", __func__);
 		for (j = 0; j < num_keys; j++) {
 			if (strchr(keys[j].key, *string) != NULL) {
 				i = strlcat(buf, keys[j].repl, sizeof(buf));
@@ -653,62 +656,63 @@ tun_open(int tun, int mode)
 	struct ifreq ifr;
 	char name[100];
 	int fd = -1, sock;
+	const char *tunbase = "tun";
+
+	if (mode == SSH_TUNMODE_ETHERNET)
+		tunbase = "tap";
 
 	/* Open the tunnel device */
 	if (tun <= SSH_TUNID_MAX) {
-		snprintf(name, sizeof(name), "/dev/tun%d", tun);
+		snprintf(name, sizeof(name), "/dev/%s%d", tunbase, tun);
 		fd = open(name, O_RDWR);
 	} else if (tun == SSH_TUNID_ANY) {
 		for (tun = 100; tun >= 0; tun--) {
-			snprintf(name, sizeof(name), "/dev/tun%d", tun);
+			snprintf(name, sizeof(name), "/dev/%s%d",
+			    tunbase, tun);
 			if ((fd = open(name, O_RDWR)) >= 0)
 				break;
 		}
 	} else {
 		debug("%s: invalid tunnel %u", __func__, tun);
-		return (-1);
+		return -1;
 	}
 
 	if (fd < 0) {
-		debug("%s: %s open failed: %s", __func__, name, strerror(errno));
-		return (-1);
+		debug("%s: %s open: %s", __func__, name, strerror(errno));
+		return -1;
 	}
 
 	debug("%s: %s mode %d fd %d", __func__, name, mode, fd);
 
-	/* Set the tunnel device operation mode */
-	snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tun%d", tun);
+	/* Bring interface up if it is not already */
+	snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s%d", tunbase, tun);
 	if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
 		goto failed;
 
-	if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1)
-		goto failed;
-
-	/* Set interface mode */
-	ifr.ifr_flags &= ~IFF_UP;
-	if (mode == SSH_TUNMODE_ETHERNET)
-		ifr.ifr_flags |= IFF_LINK0;
-	else
-		ifr.ifr_flags &= ~IFF_LINK0;
-	if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
+	if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1) {
+		debug("%s: get interface %s flags: %s", __func__,
+		    ifr.ifr_name, strerror(errno));
 		goto failed;
+	}
 
-	/* Bring interface up */
-	ifr.ifr_flags |= IFF_UP;
-	if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
-		goto failed;
+	if (!(ifr.ifr_flags & IFF_UP)) {
+		ifr.ifr_flags |= IFF_UP;
+		if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1) {
+			debug("%s: activate interface %s: %s", __func__,
+			    ifr.ifr_name, strerror(errno));
+			goto failed;
+		}
+	}
 
 	close(sock);
-	return (fd);
+	return fd;
 
  failed:
 	if (fd >= 0)
 		close(fd);
 	if (sock >= 0)
 		close(sock);
-	debug("%s: failed to set %s mode %d: %s", __func__, name,
-	    mode, strerror(errno));
-	return (-1);
+	return -1;
 #else
 	error("Tunnel interfaces are not supported on this platform");
 	return (-1);
@@ -1107,7 +1111,7 @@ unix_listener(const char *path, int backlog, int unlink_first)
 void
 sock_set_v6only(int s)
 {
-#ifdef IPV6_V6ONLY
+#if defined(IPV6_V6ONLY) && !defined(__OpenBSD__)
 	int on = 1;
 
 	debug3("%s: set socket %d IPV6_V6ONLY", __func__, s);