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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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30
net/l2tp/l2tp_ip.c
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@@ -475,25 +475,17 @@ static int l2tp_ip_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
if (opt && opt->srr)
daddr = opt->faddr;
{
struct flowi fl = { .oif = sk->sk_bound_dev_if,
.fl4_dst = daddr,
.fl4_src = inet->inet_saddr,
.fl4_tos = RT_CONN_FLAGS(sk),
.proto = sk->sk_protocol,
.flags = inet_sk_flowi_flags(sk),
.fl_ip_sport = inet->inet_sport,
.fl_ip_dport = inet->inet_dport };
/* If this fails, retransmit mechanism of transport layer will
* keep trying until route appears or the connection times
* itself out.
*/
security_sk_classify_flow(sk, &fl);
rt = ip_route_output_flow(sock_net(sk), &fl, sk);
if (IS_ERR(rt))
goto no_route;
}
/* If this fails, retransmit mechanism of transport layer will
* keep trying until route appears or the connection times
* itself out.
*/
rt = ip_route_output_ports(sock_net(sk), sk,
daddr, inet->inet_saddr,
inet->inet_dport, inet->inet_sport,
sk->sk_protocol, RT_CONN_FLAGS(sk),
sk->sk_bound_dev_if);
if (IS_ERR(rt))
goto no_route;
sk_setup_caps(sk, &rt->dst);
}
skb_dst_set(skb, dst_clone(&rt->dst));