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ipv6: Make ipv6_is_mld() inline and use it from ip6_mc_input().

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Move generalized version of ipv6_is_mld() to header,
and use it from ip6_mc_input().

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 2013-01-13 05:02:18 +00:00 committed by David S. Miller
parent e7219858ac
commit daad151263
3 changed files with 28 additions and 46 deletions
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26
include/net/addrconf.h
View File

@ -150,7 +150,31 @@ extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
extern bool ipv6_chk_mcast_addr(struct net_device *dev, extern bool ipv6_chk_mcast_addr(struct net_device *dev,
const struct in6_addr *group, const struct in6_addr *group,
const struct in6_addr *src_addr); const struct in6_addr *src_addr);
extern bool ipv6_is_mld(struct sk_buff *skb, int nexthdr);
/*
* identify MLD packets for MLD filter exceptions
*/
static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
{
struct icmp6hdr *hdr;
if (nexthdr != IPPROTO_ICMPV6 ||
!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
return false;
hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
switch (hdr->icmp6_type) {
case ICMPV6_MGM_QUERY:
case ICMPV6_MGM_REPORT:
case ICMPV6_MGM_REDUCTION:
case ICMPV6_MLD2_REPORT:
return true;
default:
break;
}
return false;
}
extern void addrconf_prefix_rcv(struct net_device *dev, extern void addrconf_prefix_rcv(struct net_device *dev,
u8 *opt, int len, bool sllao); u8 *opt, int len, bool sllao);

21
net/ipv6/ip6_input.c
View File

@ -212,7 +212,7 @@ static int ip6_input_finish(struct sk_buff *skb)
if (ipv6_addr_is_multicast(&hdr->daddr) && if (ipv6_addr_is_multicast(&hdr->daddr) &&
!ipv6_chk_mcast_addr(skb->dev, &hdr->daddr, !ipv6_chk_mcast_addr(skb->dev, &hdr->daddr,
&hdr->saddr) && &hdr->saddr) &&
!ipv6_is_mld(skb, nexthdr)) !ipv6_is_mld(skb, nexthdr, skb_network_header_len(skb)))
goto discard; goto discard;
} }
if (!(ipprot->flags & INET6_PROTO_NOPOLICY) && if (!(ipprot->flags & INET6_PROTO_NOPOLICY) &&
@ -283,7 +283,6 @@ int ip6_mc_input(struct sk_buff *skb)
if (unlikely(opt->ra)) { if (unlikely(opt->ra)) {
/* Check if this is a mld message */ /* Check if this is a mld message */
u8 *ptr = skb_network_header(skb) + opt->ra; u8 *ptr = skb_network_header(skb) + opt->ra;
struct icmp6hdr *icmp6;
u8 nexthdr = hdr->nexthdr; u8 nexthdr = hdr->nexthdr;
__be16 frag_off; __be16 frag_off;
int offset; int offset;
@ -303,24 +302,10 @@ int ip6_mc_input(struct sk_buff *skb)
if (offset < 0) if (offset < 0)
goto out; goto out;
if (nexthdr != IPPROTO_ICMPV6) if (!ipv6_is_mld(skb, nexthdr, offset))
goto out; goto out;
if (!pskb_may_pull(skb, (skb_network_header(skb) + deliver = true;
offset + 1 - skb->data)))
goto out;
icmp6 = (struct icmp6hdr *)(skb_network_header(skb) + offset);
switch (icmp6->icmp6_type) {
case ICMPV6_MGM_QUERY:
case ICMPV6_MGM_REPORT:
case ICMPV6_MGM_REDUCTION:
case ICMPV6_MLD2_REPORT:
deliver = true;
break;
}
goto out;
} }
/* unknown RA - process it normally */ /* unknown RA - process it normally */
} }

27
net/ipv6/mcast.c
View File

@ -934,33 +934,6 @@ int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
return err; return err;
} }
/*
* identify MLD packets for MLD filter exceptions
*/
bool ipv6_is_mld(struct sk_buff *skb, int nexthdr)
{
struct icmp6hdr *pic;
if (nexthdr != IPPROTO_ICMPV6)
return false;
if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
return false;
pic = icmp6_hdr(skb);
switch (pic->icmp6_type) {
case ICMPV6_MGM_QUERY:
case ICMPV6_MGM_REPORT:
case ICMPV6_MGM_REDUCTION:
case ICMPV6_MLD2_REPORT:
return true;
default:
break;
}
return false;
}
/* /*
* check if the interface/address pair is valid * check if the interface/address pair is valid
*/ */