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ipv6: ndisc: inherit metadata dst when creating ndisc requests 

If output device wants to see the dst, inherit the dst of the original skb
in the ndisc request.

This is an IPv6 counterpart of commit 0accfc268f ("arp: Inherit metadata
dst when creating ARP requests").

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Jiri Benc 2015-08-20 13:56:27 +02:00 committed by David S. Miller
parent 06e9d040ba
commit ab450605b3
4 changed files with 11 additions and 6 deletions
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3
include/net/ndisc.h
View File

@ -182,7 +182,8 @@ int ndisc_rcv(struct sk_buff *skb);
void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
const struct in6_addr *solicit,
const struct in6_addr *daddr, const struct in6_addr *saddr);
const struct in6_addr *daddr, const struct in6_addr *saddr,
struct sk_buff *oskb);
void ndisc_send_rs(struct net_device *dev,
const struct in6_addr *saddr, const struct in6_addr *daddr);

2
net/ipv6/addrconf.c
View File

@ -3656,7 +3656,7 @@ static void addrconf_dad_work(struct work_struct *w)
/* send a neighbour solicitation for our addr */
addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any, NULL);
out:
in6_ifa_put(ifp);
rtnl_unlock();

10
net/ipv6/ndisc.c
View File

@ -553,7 +553,8 @@ static void ndisc_send_unsol_na(struct net_device *dev)
void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
const struct in6_addr *solicit,
const struct in6_addr *daddr, const struct in6_addr *saddr)
const struct in6_addr *daddr, const struct in6_addr *saddr,
struct sk_buff *oskb)
{
struct sk_buff *skb;
struct in6_addr addr_buf;
@ -589,6 +590,9 @@ void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
ndisc_fill_addr_option(skb, ND_OPT_SOURCE_LL_ADDR,
dev->dev_addr);
if (!(dev->priv_flags & IFF_XMIT_DST_RELEASE) && oskb)
skb_dst_copy(skb, oskb);
ndisc_send_skb(skb, daddr, saddr);
}
@ -675,12 +679,12 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb)
"%s: trying to ucast probe in NUD_INVALID: %pI6\n",
__func__, target);
}
ndisc_send_ns(dev, neigh, target, target, saddr);
ndisc_send_ns(dev, neigh, target, target, saddr, skb);
} else if ((probes -= NEIGH_VAR(neigh->parms, APP_PROBES)) < 0) {
neigh_app_ns(neigh);
} else {
addrconf_addr_solict_mult(target, &mcaddr);
ndisc_send_ns(dev, NULL, target, &mcaddr, saddr);
ndisc_send_ns(dev, NULL, target, &mcaddr, saddr, skb);
}
}

2
net/ipv6/route.c
View File

@ -538,7 +538,7 @@ static void rt6_probe_deferred(struct work_struct *w)
container_of(w, struct __rt6_probe_work, work);
addrconf_addr_solict_mult(&work->target, &mcaddr);
ndisc_send_ns(work->dev, NULL, &work->target, &mcaddr, NULL);
ndisc_send_ns(work->dev, NULL, &work->target, &mcaddr, NULL, NULL);
dev_put(work->dev);
kfree(work);
}