[IPV4] UDP: Fix endianness bugs in hashing changes.

I accidently applied an earlier version of Eric Dumazet's patch, from
March 21st.  His version from March 30th didn't have these bugs, so
this just interdiffs to the correct patch.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 1449707..db313d9 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -270,10 +270,10 @@ static struct sock *__udp4_lib_lookup(__be32 saddr, __be16 sport,
        struct sock *sk, *result = NULL;
        struct hlist_node *node;
        unsigned int hash, hashwild;
-       int score, best = -1;
+       int score, best = -1, hport = ntohs(dport);
 
-       hash = hash_port_and_addr(ntohs(dport), daddr);
-       hashwild = hash_port_and_addr(ntohs(dport), 0);
+       hash = hash_port_and_addr(hport, daddr);
+       hashwild = hash_port_and_addr(hport, 0);
 
        read_lock(&udp_hash_lock);
 
@@ -283,7 +283,7 @@ lookup:
                struct inet_sock *inet = inet_sk(sk);
 
                if (sk->sk_hash != hash || ipv6_only_sock(sk) ||
-                       inet->num != dport)
+                       inet->num != hport)
                        continue;
 
                score = (sk->sk_family == PF_INET ? 1 : 0);
@@ -327,11 +327,10 @@ found:
        return result;
 }
 
-static inline struct sock *udp_v4_mcast_next(
-                       struct sock *sk,
-                       unsigned int hnum, __be16 loc_port, __be32 loc_addr,
-                       __be16 rmt_port, __be32 rmt_addr,
-                       int dif)
+static inline struct sock *udp_v4_mcast_next(struct sock *sk, unsigned int hnum,
+                                            int hport, __be32 loc_addr,
+                                            __be16 rmt_port, __be32 rmt_addr,
+                                            int dif)
 {
        struct hlist_node *node;
        struct sock *s = sk;
@@ -340,7 +339,7 @@ static inline struct sock *udp_v4_mcast_next(
                struct inet_sock *inet = inet_sk(s);
 
                if (s->sk_hash != hnum                                  ||
-                   inet->num != loc_port                               ||
+                   inet->num != hport                                  ||
                    (inet->daddr && inet->daddr != rmt_addr)            ||
                    (inet->dport != rmt_port && inet->dport)            ||
                    (inet->rcv_saddr && inet->rcv_saddr != loc_addr)    ||
@@ -1173,8 +1172,9 @@ static int __udp4_lib_mcast_deliver(struct sk_buff *skb,
 {
        struct sock *sk, *skw, *sknext;
        int dif;
-       unsigned int hash = hash_port_and_addr(ntohs(uh->dest), daddr);
-       unsigned int hashwild = hash_port_and_addr(ntohs(uh->dest), 0);
+       int hport = ntohs(uh->dest);
+       unsigned int hash = hash_port_and_addr(hport, daddr);
+       unsigned int hashwild = hash_port_and_addr(hport, 0);
 
        dif = skb->dev->ifindex;
 
@@ -1183,20 +1183,20 @@ static int __udp4_lib_mcast_deliver(struct sk_buff *skb,
        sk = sk_head(&udptable[hash & (UDP_HTABLE_SIZE - 1)]);
        skw = sk_head(&udptable[hashwild & (UDP_HTABLE_SIZE - 1)]);
 
-       sk = udp_v4_mcast_next(sk, hash, uh->dest, daddr, uh->source, saddr, dif);
+       sk = udp_v4_mcast_next(sk, hash, hport, daddr, uh->source, saddr, dif);
        if (!sk) {
                hash = hashwild;
-               sk = udp_v4_mcast_next(skw, hash, uh->dest, daddr, uh->source,
+               sk = udp_v4_mcast_next(skw, hash, hport, daddr, uh->source,
                        saddr, dif);
        }
        if (sk) {
                do {
                        struct sk_buff *skb1 = skb;
-                       sknext = udp_v4_mcast_next(sk_next(sk), hash, uh->dest,
-                               daddr, uh->source, saddr, dif);
+                       sknext = udp_v4_mcast_next(sk_next(sk), hash, hport,
+                                               daddr, uh->source, saddr, dif);
                        if (!sknext && hash != hashwild) {
                                hash = hashwild;
-                               sknext = udp_v4_mcast_next(skw, hash, uh->dest,
+                               sknext = udp_v4_mcast_next(skw, hash, hport,
                                        daddr, uh->source, saddr, dif);
                        }
                        if (sknext)
@@ -1295,7 +1295,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
                return __udp4_lib_mcast_deliver(skb, uh, saddr, daddr, udptable);
 
        sk = __udp4_lib_lookup(saddr, uh->source, daddr, uh->dest,
-                              skb->dev->ifindex, udptable        );
+                              skb->dev->ifindex, udptable);
 
        if (sk != NULL) {
                int ret = udp_queue_rcv_skb(sk, skb);