path: root/net/dccp/ipv4.c
diff options
authorDavid S. Miller <davem@davemloft.net>2011-02-24 13:38:12 -0800
committerDavid S. Miller <davem@davemloft.net>2011-02-24 13:38:12 -0800
commitdca8b089c95d94afa1d715df257de0286350e99d (patch)
treef686fef8ef3d80f81bd9f91072ce8c5f347e3e7c /net/dccp/ipv4.c
parentxfrm: Const'ify xfrm_address_t args to xfrm_state_find. (diff)
ipv4: Rearrange how ip_route_newports() gets port keys.
ip_route_newports() is the only place in the entire kernel that cares about the port members in the routing cache entry's lookup flow key. Therefore the only reason we store an entire flow inside of the struct rtentry is for this one special case. Rewrite ip_route_newports() such that: 1) The caller passes in the original port values, so we don't need to use the rth->fl.fl_ip_{s,d}port values to remember them. 2) The lookup flow is constructed by hand instead of being copied from the routing cache entry's flow. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
1 files changed, 7 insertions, 3 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 45a434f94169..937989199c80 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -43,6 +43,7 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
struct inet_sock *inet = inet_sk(sk);
struct dccp_sock *dp = dccp_sk(sk);
const struct sockaddr_in *usin = (struct sockaddr_in *)uaddr;
+ __be16 orig_sport, orig_dport;
struct rtable *rt;
__be32 daddr, nexthop;
int tmp;
@@ -63,10 +64,12 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
nexthop = inet->opt->faddr;
+ orig_sport = inet->inet_sport;
+ orig_dport = usin->sin_port;
tmp = ip_route_connect(&rt, nexthop, inet->inet_saddr,
RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
- inet->inet_sport, usin->sin_port, sk, 1);
+ orig_sport, orig_dport, sk, 1);
if (tmp < 0)
return tmp;
@@ -99,8 +102,9 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (err != 0)
goto failure;
- err = ip_route_newports(&rt, IPPROTO_DCCP, inet->inet_sport,
- inet->inet_dport, sk);
+ err = ip_route_newports(&rt, IPPROTO_DCCP,
+ orig_sport, orig_dport,
+ inet->inet_sport, inet->inet_dport, sk);
if (err != 0)
goto failure;