diff options
| author |   Alvaro Neira <alvaroneay@gmail.com> | 2014-11-26 10:21:37 +0100 |
|---|---|---|
| committer |   Pablo Neira Ayuso <pablo@netfilter.org> | 2014-11-27 13:08:29 +0100 |
| commit | 1b63d4b9b54cee6002757a8d20b537aa4037ae8f (patch) | |
| tree | bb4e04a4c5dc692d3fa4886fb9fc58c7421bfdcb /net/bridge | |
| parent | netfilter: nf_tables_bridge: export nft_reject_ip*hdr_validate functions (diff) | |
| download | linux-dev-1b63d4b9b54cee6002757a8d20b537aa4037ae8f.tar.xz linux-dev-1b63d4b9b54cee6002757a8d20b537aa4037ae8f.zip | |
netfilter: nf_tables_bridge: set the pktinfo for IPv4/IPv6 traffic
This patch adds the missing bits to allow to match per meta l4proto from
the bridge. Example:
nft add rule bridge filter input ether type {ip, ip6} meta l4proto udp counter
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/bridge')
| -rw-r--r-- | net/bridge/netfilter/nf_tables_bridge.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/net/bridge/netfilter/nf_tables_bridge.c b/net/bridge/netfilter/nf_tables_bridge.c index d468c19faecd..19473a9371b8 100644 --- a/net/bridge/netfilter/nf_tables_bridge.c +++ b/net/bridge/netfilter/nf_tables_bridge.c @@ -16,6 +16,8 @@ #include <net/netfilter/nf_tables_bridge.h> #include <linux/ip.h> #include <linux/ipv6.h> +#include <net/netfilter/nf_tables_ipv4.h> +#include <net/netfilter/nf_tables_ipv6.h> int nft_bridge_iphdr_validate(struct sk_buff *skb) { @@ -62,6 +64,32 @@ int nft_bridge_ip6hdr_validate(struct sk_buff *skb) } EXPORT_SYMBOL_GPL(nft_bridge_ip6hdr_validate); +static inline void nft_bridge_set_pktinfo_ipv4(struct nft_pktinfo *pkt, + const struct nf_hook_ops *ops, + struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out) +{ + if (nft_bridge_iphdr_validate(skb)) + nft_set_pktinfo_ipv4(pkt, ops, skb, in, out); + else + nft_set_pktinfo(pkt, ops, skb, in, out); +} + +static inline void nft_bridge_set_pktinfo_ipv6(struct nft_pktinfo *pkt, + const struct nf_hook_ops *ops, + struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out) +{ +#if IS_ENABLED(CONFIG_IPV6) + if (nft_bridge_ip6hdr_validate(skb) && + nft_set_pktinfo_ipv6(pkt, ops, skb, in, out) == 0) + return; +#endif + nft_set_pktinfo(pkt, ops, skb, in, out); +} + static unsigned int nft_do_chain_bridge(const struct nf_hook_ops *ops, struct sk_buff *skb, @@ -71,7 +99,17 @@ nft_do_chain_bridge(const struct nf_hook_ops *ops, { struct nft_pktinfo pkt; - nft_set_pktinfo(&pkt, ops, skb, in, out); + switch (eth_hdr(skb)->h_proto) { + case htons(ETH_P_IP): + nft_bridge_set_pktinfo_ipv4(&pkt, ops, skb, in, out); + break; + case htons(ETH_P_IPV6): + nft_bridge_set_pktinfo_ipv6(&pkt, ops, skb, in, out); + break; + default: + nft_set_pktinfo(&pkt, ops, skb, in, out); + break; + } return nft_do_chain(&pkt, ops); } |