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ipv6: ndisc: inherit metadata dst when creating ndisc requests

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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>
This commit is contained in:
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);
}