[PATCH] IPv4: route.c: Change checks against 0xffffffff toipv4_is_lbcast()

From: Andy Walls
Date: Sun Oct 17 2010 - 21:11:41 EST



Change a few checks against the hardcoded broadcast address,
0xffffffff, to ipv4_is_lbcast(). Remove some existing checks
using ipv4_is_lbcast() that are now obviously superfluous.

Signed-off-by: Andy Walls <awalls@xxxxxxxxxxxxxxxx>
---
net/ipv4/route.c | 13 ++++++-------
1 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 3f56b6e..d78c764 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2124,7 +2124,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
ipv4_is_loopback(saddr))
goto martian_source;

- if (daddr == htonl(0xFFFFFFFF) || (saddr == 0 && daddr == 0))
+ if (ipv4_is_lbcast(daddr) || (saddr == 0 && daddr == 0))
goto brd_input;

/* Accept zero addresses only to limited broadcast;
@@ -2133,8 +2133,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
if (ipv4_is_zeronet(saddr))
goto martian_source;

- if (ipv4_is_lbcast(daddr) || ipv4_is_zeronet(daddr) ||
- ipv4_is_loopback(daddr))
+ if (ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr))
goto martian_destination;

/*
@@ -2370,11 +2369,11 @@ static int __mkroute_output(struct rtable **result,
if (ipv4_is_loopback(fl->fl4_src) && !(dev_out->flags&IFF_LOOPBACK))
return -EINVAL;

- if (fl->fl4_dst == htonl(0xFFFFFFFF))
+ if (ipv4_is_lbcast(fl->fl4_dst))
res->type = RTN_BROADCAST;
else if (ipv4_is_multicast(fl->fl4_dst))
res->type = RTN_MULTICAST;
- else if (ipv4_is_lbcast(fl->fl4_dst) || ipv4_is_zeronet(fl->fl4_dst))
+ else if (ipv4_is_zeronet(fl->fl4_dst))
return -EINVAL;

if (dev_out->flags & IFF_LOOPBACK)
@@ -2543,7 +2542,7 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,

if (oldflp->oif == 0 &&
(ipv4_is_multicast(oldflp->fl4_dst) ||
- oldflp->fl4_dst == htonl(0xFFFFFFFF))) {
+ ipv4_is_lbcast(oldflp->fl4_dst))) {
/* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
dev_out = ip_dev_find(net, oldflp->fl4_src);
if (dev_out == NULL)
@@ -2592,7 +2591,7 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
}

if (ipv4_is_local_multicast(oldflp->fl4_dst) ||
- oldflp->fl4_dst == htonl(0xFFFFFFFF)) {
+ ipv4_is_lbcast(oldflp->fl4_dst)) {
if (!fl.fl4_src)
fl.fl4_src = inet_select_addr(dev_out, 0,
RT_SCOPE_LINK);
--
1.7.2.3



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