diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index 801bdd1e56e33b168b54705e0bfb8464e076f3b5..98144cdd8986038d9cc2f427aff71b310ad18e7e 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -571,6 +571,7 @@ enum nft_exthdr_attributes { * @NFT_META_L4PROTO: layer 4 protocol number * @NFT_META_BRI_IIFNAME: packet input bridge interface name * @NFT_META_BRI_OIFNAME: packet output bridge interface name + * @NFT_META_PKTTYPE: packet type (skb->pkt_type), special handling for loopback */ enum nft_meta_keys { NFT_META_LEN, @@ -592,6 +593,7 @@ enum nft_meta_keys { NFT_META_L4PROTO, NFT_META_BRI_IIFNAME, NFT_META_BRI_OIFNAME, + NFT_META_PKTTYPE, }; /** diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c index 852b178c6ae7fa2f7dbd6f7887404033da45971f..4f2862fc12c28c6a374d391b796f8bd285416553 100644 --- a/net/netfilter/nft_meta.c +++ b/net/netfilter/nft_meta.c @@ -14,6 +14,9 @@ #include #include #include +#include +#include +#include #include #include #include /* for TCP_TIME_WAIT */ @@ -124,6 +127,30 @@ void nft_meta_get_eval(const struct nft_expr *expr, dest->data[0] = skb->secmark; break; #endif + case NFT_META_PKTTYPE: + if (skb->pkt_type != PACKET_LOOPBACK) { + dest->data[0] = skb->pkt_type; + break; + } + + switch (pkt->ops->pf) { + case NFPROTO_IPV4: + if (ipv4_is_multicast(ip_hdr(skb)->daddr)) + dest->data[0] = PACKET_MULTICAST; + else + dest->data[0] = PACKET_BROADCAST; + break; + case NFPROTO_IPV6: + if (ipv6_hdr(skb)->daddr.s6_addr[0] == 0xFF) + dest->data[0] = PACKET_MULTICAST; + else + dest->data[0] = PACKET_BROADCAST; + break; + default: + WARN_ON(1); + goto err; + } + break; default: WARN_ON(1); goto err; @@ -195,6 +222,7 @@ int nft_meta_get_init(const struct nft_ctx *ctx, #ifdef CONFIG_NETWORK_SECMARK case NFT_META_SECMARK: #endif + case NFT_META_PKTTYPE: break; default: return -EOPNOTSUPP;