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ndisc: Use ndisc_send_skb() for redirect. 

Reuse dst if one is attached with skb.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki / 吉藤英明 2013-01-21 06:49:03 +00:00 committed by David S. Miller
parent aa4bdd4b3f
commit f4de84c64e
1 changed files with 14 additions and 23 deletions
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37
net/ipv6/ndisc.c
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@ -467,10 +467,8 @@ static void ndisc_send_skb(struct sk_buff *skb,
const struct in6_addr *daddr,
const struct in6_addr *saddr)
{
struct flowi6 fl6;
struct dst_entry *dst;
struct dst_entry *dst = skb_dst(skb);
struct net *net = dev_net(skb->dev);
struct sock *sk = net->ipv6.ndisc_sk;
struct inet6_dev *idev;
int err;
struct icmp6hdr *icmp6h = icmp6_hdr(skb);
@ -478,14 +476,19 @@ static void ndisc_send_skb(struct sk_buff *skb,
type = icmp6h->icmp6_type;
icmpv6_flow_init(sk, &fl6, type, saddr, daddr, skb->dev->ifindex);
dst = icmp6_dst_alloc(skb->dev, &fl6);
if (IS_ERR(dst)) {
kfree_skb(skb);
return;
}
if (!dst) {
struct sock *sk = net->ipv6.ndisc_sk;
struct flowi6 fl6;
skb_dst_set(skb, dst);
icmpv6_flow_init(sk, &fl6, type, saddr, daddr, skb->dev->ifindex);
dst = icmp6_dst_alloc(skb->dev, &fl6);
if (IS_ERR(dst)) {
kfree_skb(skb);
return;
}
skb_dst_set(skb, dst);
}
rcu_read_lock();
idev = __in6_dev_get(dst->dev);
@ -1404,10 +1407,8 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
struct in6_addr saddr_buf;
struct rt6_info *rt;
struct dst_entry *dst;
struct inet6_dev *idev;
struct flowi6 fl6;
int rd_len;
int err;
u8 ha_buf[MAX_ADDR_LEN], *ha = NULL;
bool ret;
@ -1515,17 +1516,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
inet6_sk(sk)->hop_limit, buff->len);
skb_dst_set(buff, dst);
rcu_read_lock();
idev = __in6_dev_get(dst->dev);
IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, buff, NULL, dst->dev,
dst_output);
if (!err) {
ICMP6MSGOUT_INC_STATS(net, idev, NDISC_REDIRECT);
ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
}
rcu_read_unlock();
ndisc_send_skb(buff, &ipv6_hdr(skb)->saddr, &saddr_buf);
return;
release: