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[IPV6] NEIGH: Optimize is_router check.

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Our interest is not the whole entry of proxy neighbor but the
NTF_ROUTER flag.  Let's test it explicitly.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki 2008-03-28 13:37:58 +09:00
parent be01d655d9
commit 0736ffc04e
1 changed files with 11 additions and 11 deletions
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22
net/ipv6/ndisc.c
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@ -661,18 +661,19 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb)
}
}
static struct pneigh_entry *pndisc_check_router(struct net_device *dev,
struct in6_addr *addr, int *is_router)
static int pndisc_is_router(const void *pkey,
struct net_device *dev)
{
struct pneigh_entry *n;
int ret = -1;
read_lock_bh(&nd_tbl.lock);
n = __pneigh_lookup(&nd_tbl, dev_net(dev), addr, dev);
if (n != NULL)
*is_router = (n->flags & NTF_ROUTER);
n = __pneigh_lookup(&nd_tbl, dev_net(dev), pkey, dev);
if (n)
ret = !!(n->flags & NTF_ROUTER);
read_unlock_bh(&nd_tbl.lock);
return n;
return ret;
}
static void ndisc_recv_ns(struct sk_buff *skb)
@ -688,10 +689,9 @@ static void ndisc_recv_ns(struct sk_buff *skb)
struct inet6_ifaddr *ifp;
struct inet6_dev *idev = NULL;
struct neighbour *neigh;
struct pneigh_entry *pneigh = NULL;
int dad = ipv6_addr_any(saddr);
int inc;
int is_router = 0;
int is_router = -1;
if (ipv6_addr_is_multicast(&msg->target)) {
ND_PRINTK2(KERN_WARNING
@ -790,8 +790,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
if (ipv6_chk_acast_addr(dev_net(dev), dev, &msg->target) ||
(idev->cnf.forwarding &&
(ipv6_devconf.proxy_ndp || idev->cnf.proxy_ndp) &&
(pneigh = pndisc_check_router(dev, &msg->target,
&is_router)) != NULL)) {
(is_router = pndisc_is_router(&msg->target, dev)) >= 0)) {
if (!(NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED) &&
skb->pkt_type != PACKET_HOST &&
inc != 0 &&
@ -812,7 +811,8 @@ static void ndisc_recv_ns(struct sk_buff *skb)
goto out;
}
is_router = !!(pneigh ? is_router : idev->cnf.forwarding);
if (is_router < 0)
is_router = !!idev->cnf.forwarding;
if (dad) {
struct in6_addr maddr;