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ipv4: Create and use route lookup helpers.

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The idea here is this minimizes the number of places one has to edit
in order to make changes to how flows are defined and used.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2011-03-12 00:00:52 -05:00
parent 1561747ddf
commit 78fbfd8a65
23 changed files with 204 additions and 324 deletions
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12
net/ipv4/arp.c
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@@ -433,14 +433,12 @@ static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip)
static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev)
{
struct flowi fl = { .fl4_dst = sip,
.fl4_src = tip };
struct rtable *rt;
int flag = 0;
/*unsigned long now; */
struct net *net = dev_net(dev);
rt = ip_route_output_key(net, &fl);
rt = ip_route_output(net, sip, tip, 0, 0);
if (IS_ERR(rt))
return 1;
if (rt->dst.dev != dev) {
@@ -1062,9 +1060,7 @@ static int arp_req_set(struct net *net, struct arpreq *r,
if (r->arp_flags & ATF_PERM)
r->arp_flags |= ATF_COM;
if (dev == NULL) {
struct flowi fl = { .fl4_dst = ip,
.fl4_tos = RTO_ONLINK };
struct rtable *rt = ip_route_output_key(net, &fl);
struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);
if (IS_ERR(rt))
return PTR_ERR(rt);
@@ -1185,9 +1181,7 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
if (dev == NULL) {
struct flowi fl = { .fl4_dst = ip,
.fl4_tos = RTO_ONLINK };
struct rtable *rt = ip_route_output_key(net, &fl);
struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);
if (IS_ERR(rt))
return PTR_ERR(rt);
dev = rt->dst.dev;