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authorDavid Engel <gigem@comcast.net>2005-10-21 22:09:16 -0500
committerArnaldo Carvalho de Melo <acme@mandriva.com>2005-10-26 01:20:21 -0200
commitdcab5e1eeccf5e226c771ecc013631cde157435f (patch)
treed0e6f0c63caee92c8ac86d24fb280a0c65be11d9 /net/ipv4/devinet.c
parent95df1c04ab3f7ca617774930df62c0893a188c2c (diff)
[IPV4]: Fix setting broadcast for SIOCSIFNETMASK
Fix setting of the broadcast address when the netmask is set via SIOCSIFNETMASK in Linux 2.6. The code wanted the old value of ifa->ifa_mask but used it after it had already been overwritten with the new value. Signed-off-by: David Engel <gigem@comcast.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'net/ipv4/devinet.c')
-rw-r--r--net/ipv4/devinet.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 74f2207e131..4ec4b2ca6ab 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -715,6 +715,7 @@ int devinet_ioctl(unsigned int cmd, void __user *arg)
break;
ret = 0;
if (ifa->ifa_mask != sin->sin_addr.s_addr) {
+ u32 old_mask = ifa->ifa_mask;
inet_del_ifa(in_dev, ifap, 0);
ifa->ifa_mask = sin->sin_addr.s_addr;
ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask);
@@ -728,7 +729,7 @@ int devinet_ioctl(unsigned int cmd, void __user *arg)
if ((dev->flags & IFF_BROADCAST) &&
(ifa->ifa_prefixlen < 31) &&
(ifa->ifa_broadcast ==
- (ifa->ifa_local|~ifa->ifa_mask))) {
+ (ifa->ifa_local|~old_mask))) {
ifa->ifa_broadcast = (ifa->ifa_local |
~sin->sin_addr.s_addr);
}