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authorYOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>2013-01-13 05:02:18 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-13 20:17:14 -0500
commitdaad151263cf334d57fcc0270e2483d4b4639650 (patch)
treeca0ba6274d94c1ce31a51a296a7032bb43a1cc08 /include/net/addrconf.h
parente7219858ac1f98213a4714d0e24e7a003e1bf6a2 (diff)
downloadop-kernel-dev-daad151263cf334d57fcc0270e2483d4b4639650.zip
op-kernel-dev-daad151263cf334d57fcc0270e2483d4b4639650.tar.gz
ipv6: Make ipv6_is_mld() inline and use it from ip6_mc_input().
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>
Diffstat (limited to 'include/net/addrconf.h')
-rw-r--r--include/net/addrconf.h26
1 files changed, 25 insertions, 1 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index df4ef94..7cd14c0 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -150,7 +150,31 @@ extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
extern bool ipv6_chk_mcast_addr(struct net_device *dev,
const struct in6_addr *group,
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,
u8 *opt, int len, bool sllao);
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