From e2e48b471634faa6958718c27208d366b13fe878 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Tue, 15 Jan 2019 22:03:33 +0100 Subject: [PATCH] netfilter: conntrack: handle icmp pkt_to_tuple helper via direct calls rather than handling them via indirect call, use a direct one instead. This leaves GRE as the last user of this indirect call facility. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- include/net/netfilter/nf_conntrack_l4proto.h | 10 ++++++++++ net/netfilter/nf_conntrack_core.c | 6 ++++++ net/netfilter/nf_conntrack_proto_icmp.c | 5 ++--- net/netfilter/nf_conntrack_proto_icmpv6.c | 9 ++++----- 4 files changed, 22 insertions(+), 8 deletions(-) diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h index 6ca4355..46d5548 100644 --- a/include/net/netfilter/nf_conntrack_l4proto.h +++ b/include/net/netfilter/nf_conntrack_l4proto.h @@ -90,6 +90,16 @@ struct nf_conntrack_l4proto { struct module *me; }; +bool icmp_pkt_to_tuple(const struct sk_buff *skb, + unsigned int dataoff, + struct net *net, + struct nf_conntrack_tuple *tuple); + +bool icmpv6_pkt_to_tuple(const struct sk_buff *skb, + unsigned int dataoff, + struct net *net, + struct nf_conntrack_tuple *tuple); + int nf_conntrack_icmpv4_error(struct nf_conn *tmpl, struct sk_buff *skb, unsigned int dataoff, diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 5dfd95a..b3840d3 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -274,6 +274,12 @@ nf_ct_get_tuple(const struct sk_buff *skb, tuple->dst.protonum = protonum; tuple->dst.dir = IP_CT_DIR_ORIGINAL; + switch (protonum) { + case IPPROTO_ICMPV6: + return icmpv6_pkt_to_tuple(skb, dataoff, net, tuple); + case IPPROTO_ICMP: + return icmp_pkt_to_tuple(skb, dataoff, net, tuple); + } if (unlikely(l4proto->pkt_to_tuple)) return l4proto->pkt_to_tuple(skb, dataoff, net, tuple); diff --git a/net/netfilter/nf_conntrack_proto_icmp.c b/net/netfilter/nf_conntrack_proto_icmp.c index 381a7f3..805c1fe 100644 --- a/net/netfilter/nf_conntrack_proto_icmp.c +++ b/net/netfilter/nf_conntrack_proto_icmp.c @@ -25,8 +25,8 @@ static const unsigned int nf_ct_icmp_timeout = 30*HZ; -static bool icmp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, - struct net *net, struct nf_conntrack_tuple *tuple) +bool icmp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, + struct net *net, struct nf_conntrack_tuple *tuple) { const struct icmphdr *hp; struct icmphdr _hdr; @@ -347,7 +347,6 @@ static struct nf_proto_net *icmp_get_net_proto(struct net *net) const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp = { .l4proto = IPPROTO_ICMP, - .pkt_to_tuple = icmp_pkt_to_tuple, .invert_tuple = icmp_invert_tuple, #if IS_ENABLED(CONFIG_NF_CT_NETLINK) .tuple_to_nlattr = icmp_tuple_to_nlattr, diff --git a/net/netfilter/nf_conntrack_proto_icmpv6.c b/net/netfilter/nf_conntrack_proto_icmpv6.c index 93f27d0..20cd55e 100644 --- a/net/netfilter/nf_conntrack_proto_icmpv6.c +++ b/net/netfilter/nf_conntrack_proto_icmpv6.c @@ -30,10 +30,10 @@ static const unsigned int nf_ct_icmpv6_timeout = 30*HZ; -static bool icmpv6_pkt_to_tuple(const struct sk_buff *skb, - unsigned int dataoff, - struct net *net, - struct nf_conntrack_tuple *tuple) +bool icmpv6_pkt_to_tuple(const struct sk_buff *skb, + unsigned int dataoff, + struct net *net, + struct nf_conntrack_tuple *tuple) { const struct icmp6hdr *hp; struct icmp6hdr _hdr; @@ -358,7 +358,6 @@ static struct nf_proto_net *icmpv6_get_net_proto(struct net *net) const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 = { .l4proto = IPPROTO_ICMPV6, - .pkt_to_tuple = icmpv6_pkt_to_tuple, .invert_tuple = icmpv6_invert_tuple, #if IS_ENABLED(CONFIG_NF_CT_NETLINK) .tuple_to_nlattr = icmpv6_tuple_to_nlattr, -- 2.7.4