diff options
Diffstat (limited to 'net/ipv6/mcast.c')
| -rw-r--r-- | net/ipv6/mcast.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 33f98d9ac376..98ead2b1a669 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -107,9 +107,12 @@ static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, struct inet6_dev *idev); - #define MLD_QRV_DEFAULT 2 +/* RFC3810, 8.1 Query Version Distinctions */ +#define MLD_V1_QUERY_LEN 24 +#define MLD_V2_QUERY_LEN_MIN 28 + #define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \ (idev)->cnf.force_mld_version == 1 || \ ((idev)->mc_v1_seen && \ @@ -1146,7 +1149,7 @@ int igmp6_event_query(struct sk_buff *skb) !(group_type&IPV6_ADDR_MULTICAST)) return -EINVAL; - if (len == 24) { + if (len == MLD_V1_QUERY_LEN) { int switchback; /* MLDv1 router present */ @@ -1160,7 +1163,7 @@ int igmp6_event_query(struct sk_buff *skb) __in6_dev_put(idev); /* clear deleted report items */ mld_clear_delrec(idev); - } else if (len >= 28) { + } else if (len >= MLD_V2_QUERY_LEN_MIN) { int srcs_offset = sizeof(struct mld2_query) - sizeof(struct icmp6hdr); if (!pskb_may_pull(skb, srcs_offset)) |