diff options
| author |   Tom Herbert <tom@herbertland.com> | 2016-04-05 08:22:50 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-04-07 16:53:14 -0400 |
| commit | 63058308cd55182bbfd7a87970bd57883fcfbd2e (patch) | |
| tree | 9acc3eeb49074f52f22756facf5749f7af107cdd /net/ipv4/udp.c | |
| parent | net: Checks skb_dst to be NULL in inet_iif (diff) | |
| download | linux-dev-63058308cd55182bbfd7a87970bd57883fcfbd2e.tar.xz linux-dev-63058308cd55182bbfd7a87970bd57883fcfbd2e.zip | |
udp: Add udp6_lib_lookup_skb and udp4_lib_lookup_skb
Add externally visible functions to lookup a UDP socket by skb. This
will be used for GRO in UDP sockets. These functions also check
if skb->dst is set, and if it is not skb->dev is used to get dev_net.
This allows calling lookup functions before dst has been set on the
skbuff.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index d80312ddbb8a..3563788d064f 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -604,6 +604,19 @@ static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb, udptable, skb); } +struct sock *udp4_lib_lookup_skb(struct sk_buff *skb, + __be16 sport, __be16 dport) +{ + const struct iphdr *iph = ip_hdr(skb); + const struct net_device *dev = + skb_dst(skb) ? skb_dst(skb)->dev : skb->dev; + + return __udp4_lib_lookup(dev_net(dev), iph->saddr, sport, + iph->daddr, dport, inet_iif(skb), + &udp_table, skb); +} +EXPORT_SYMBOL_GPL(udp4_lib_lookup_skb); + /* Must be called under rcu_read_lock(). * Does increment socket refcount. */ |