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>
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@ -150,7 +150,31 @@ extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
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extern bool ipv6_chk_mcast_addr(struct net_device *dev,
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const struct in6_addr *group,
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const struct in6_addr *src_addr);
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extern bool ipv6_is_mld(struct sk_buff *skb, int nexthdr);
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/*
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* identify MLD packets for MLD filter exceptions
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*/
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static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
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{
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struct icmp6hdr *hdr;
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if (nexthdr != IPPROTO_ICMPV6 ||
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!pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
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return false;
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hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
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switch (hdr->icmp6_type) {
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case ICMPV6_MGM_QUERY:
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case ICMPV6_MGM_REPORT:
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case ICMPV6_MGM_REDUCTION:
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case ICMPV6_MLD2_REPORT:
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return true;
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default:
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break;
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}
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return false;
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}
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extern void addrconf_prefix_rcv(struct net_device *dev,
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u8 *opt, int len, bool sllao);
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@ -212,7 +212,7 @@ resubmit:
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if (ipv6_addr_is_multicast(&hdr->daddr) &&
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!ipv6_chk_mcast_addr(skb->dev, &hdr->daddr,
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&hdr->saddr) &&
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!ipv6_is_mld(skb, nexthdr))
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!ipv6_is_mld(skb, nexthdr, skb_network_header_len(skb)))
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goto discard;
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}
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if (!(ipprot->flags & INET6_PROTO_NOPOLICY) &&
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@ -283,7 +283,6 @@ int ip6_mc_input(struct sk_buff *skb)
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if (unlikely(opt->ra)) {
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/* Check if this is a mld message */
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u8 *ptr = skb_network_header(skb) + opt->ra;
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struct icmp6hdr *icmp6;
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u8 nexthdr = hdr->nexthdr;
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__be16 frag_off;
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int offset;
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@ -303,24 +302,10 @@ int ip6_mc_input(struct sk_buff *skb)
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if (offset < 0)
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goto out;
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if (nexthdr != IPPROTO_ICMPV6)
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if (!ipv6_is_mld(skb, nexthdr, offset))
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goto out;
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if (!pskb_may_pull(skb, (skb_network_header(skb) +
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offset + 1 - skb->data)))
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goto out;
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icmp6 = (struct icmp6hdr *)(skb_network_header(skb) + offset);
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switch (icmp6->icmp6_type) {
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case ICMPV6_MGM_QUERY:
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case ICMPV6_MGM_REPORT:
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case ICMPV6_MGM_REDUCTION:
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case ICMPV6_MLD2_REPORT:
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deliver = true;
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break;
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}
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goto out;
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}
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/* unknown RA - process it normally */
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}
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@ -934,33 +934,6 @@ int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
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return err;
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}
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/*
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* identify MLD packets for MLD filter exceptions
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*/
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bool ipv6_is_mld(struct sk_buff *skb, int nexthdr)
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{
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struct icmp6hdr *pic;
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if (nexthdr != IPPROTO_ICMPV6)
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return false;
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if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
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return false;
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pic = icmp6_hdr(skb);
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switch (pic->icmp6_type) {
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case ICMPV6_MGM_QUERY:
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case ICMPV6_MGM_REPORT:
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case ICMPV6_MGM_REDUCTION:
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case ICMPV6_MLD2_REPORT:
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return true;
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default:
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break;
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}
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return false;
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}
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/*
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* check if the interface/address pair is valid
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*/
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