patch-2.2.11 linux/net/ipv4/devinet.c

• Lines: 43
• Date: Mon Aug 9 12:05:10 1999
• Orig file: v2.2.10/linux/net/ipv4/devinet.c
• Orig date: Mon May 10 09:55:25 1999

diff -u --recursive --new-file v2.2.10/linux/net/ipv4/devinet.c linux/net/ipv4/devinet.c
@@ -1,7 +1,7 @@
 /*
  *	NET3	IP device support routines.
  *
- *	Version: $Id: devinet.c,v 1.28 1999/05/08 20:00:16 davem Exp $
+ *	Version: $Id: devinet.c,v 1.28.2.2 1999/08/07 10:56:18 davem Exp $
  *
  *		This program is free software; you can redistribute it and/or
  *		modify it under the terms of the GNU General Public License
@@ -100,6 +100,9 @@
 {
 	struct in_device *in_dev;
 
+	if (dev->mtu < 68)
+		return NULL;
+
 	in_dev = kmalloc(sizeof(*in_dev), GFP_KERNEL);
 	if (!in_dev)
 		return NULL;
@@ -649,9 +652,10 @@
 	for_primary_ifa(in_dev) {
 		if (ifa->ifa_scope > scope)
 			continue;
-		addr = ifa->ifa_local;
 		if (!dst || inet_ifa_match(dst, ifa))
-			return addr;
+			return ifa->ifa_local;
+		if (!addr)
+			addr = ifa->ifa_local;
 	} endfor_ifa(in_dev);
 	
 	if (addr || scope >= RT_SCOPE_LINK)
@@ -721,6 +725,10 @@
 	case NETDEV_DOWN:
 		ip_mc_down(in_dev);
 		break;
+	case NETDEV_CHANGEMTU:	
+		if (dev->mtu >= 68)
+			break;
+		/* MTU falled under minimal IP mtu. Disable IP. */
 	case NETDEV_UNREGISTER:
 		inetdev_destroy(in_dev);
 		break;