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[NETFILTER]: Restore netfilter assumptions in IPv6 multicast 

Netfilter assumes that skb->data == skb->nh.ipv6h

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2005-06-21 14:02:15 -07:00 committed by David S. Miller
parent 18b8afc771
commit e98231858b
1 changed files with 26 additions and 21 deletions
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47
net/ipv6/mcast.c
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@ -1301,15 +1301,6 @@ static struct sk_buff *mld_newpack(struct net_device *dev, int size)
return NULL;
skb_reserve(skb, LL_RESERVED_SPACE(dev));
if (dev->hard_header) {
unsigned char ha[MAX_ADDR_LEN];
ndisc_mc_map(&mld2_all_mcr, ha, dev, 1);
if (dev->hard_header(skb, dev, ETH_P_IPV6,ha,NULL,size) < 0) {
kfree_skb(skb);
return NULL;
}
}
if (ipv6_get_lladdr(dev, &addr_buf)) {
/* <draft-ietf-magma-mld-source-05.txt>:
@ -1333,6 +1324,30 @@ static struct sk_buff *mld_newpack(struct net_device *dev, int size)
return skb;
}
static inline int mld_dev_queue_xmit2(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
if (dev->hard_header) {
unsigned char ha[MAX_ADDR_LEN];
int err;
ndisc_mc_map(&skb->nh.ipv6h->daddr, ha, dev, 1);
err = dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, skb->len);
if (err < 0) {
kfree_skb(skb);
return err;
}
}
return dev_queue_xmit(skb);
}
static inline int mld_dev_queue_xmit(struct sk_buff *skb)
{
return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL, skb->dev,
mld_dev_queue_xmit2);
}
static void mld_sendpack(struct sk_buff *skb)
{
struct ipv6hdr *pip6 = skb->nh.ipv6h;
@ -1350,7 +1365,7 @@ static void mld_sendpack(struct sk_buff *skb)
pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
IPPROTO_ICMPV6, csum_partial(skb->h.raw, mldlen, 0));
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
dev_queue_xmit);
mld_dev_queue_xmit);
if (!err) {
ICMP6_INC_STATS(idev,ICMP6_MIB_OUTMSGS);
IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
@ -1656,12 +1671,6 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
}
skb_reserve(skb, LL_RESERVED_SPACE(dev));
if (dev->hard_header) {
unsigned char ha[MAX_ADDR_LEN];
ndisc_mc_map(snd_addr, ha, dev, 1);
if (dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, full_len) < 0)
goto out;
}
if (ipv6_get_lladdr(dev, &addr_buf)) {
/* <draft-ietf-magma-mld-source-05.txt>:
@ -1689,7 +1698,7 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
idev = in6_dev_get(skb->dev);
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
dev_queue_xmit);
mld_dev_queue_xmit);
if (!err) {
if (type == ICMPV6_MGM_REDUCTION)
ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBREDUCTIONS);
@ -1703,10 +1712,6 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
if (likely(idev != NULL))
in6_dev_put(idev);
return;
out:
IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
kfree_skb(skb);
}
static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,