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[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>
This commit is contained in:
David Engel 2005-10-21 22:09:16 -05:00 committed by Arnaldo Carvalho de Melo
parent 95df1c04ab
commit dcab5e1eec
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/devinet.c
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@ -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);
}