[PATCH v9 nf 05/15] netfilter: nft_chain_filter: Add bridge double vlan and pppoe
From: Eric Woudstra <hidden>
Date: 2025-03-05 10:30:11
Also in:
bridge, linux-arm-kernel, linux-hardening, linux-mediatek, lkml, netfilter-devel
Subsystem:
netfilter, networking [general], the rest · Maintainers:
Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This adds the capability to evaluate 802.1ad, QinQ, PPPoE and PPPoE-in-Q packets in the bridge filter chain. Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: Eric Woudstra <redacted> --- net/netfilter/nft_chain_filter.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/nft_chain_filter.c b/net/netfilter/nft_chain_filter.c
index 19a553550c76..7c7080c1a67d 100644
--- a/net/netfilter/nft_chain_filter.c
+++ b/net/netfilter/nft_chain_filter.c@@ -232,11 +232,27 @@ nft_do_chain_bridge(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { + struct ethhdr *ethh = eth_hdr(skb); struct nft_pktinfo pkt; + int thoff; nft_set_pktinfo(&pkt, skb, state); - switch (eth_hdr(skb)->h_proto) { + switch (ethh->h_proto) { + case htons(ETH_P_PPP_SES): + thoff = PPPOE_SES_HLEN; + ethh += thoff; + break; + case htons(ETH_P_8021Q): + thoff = VLAN_HLEN; + ethh += thoff; + break; + default: + thoff = 0; + break; + } + + switch (ethh->h_proto) { case htons(ETH_P_IP): nft_set_pktinfo_ipv4_validate(&pkt); break;
@@ -248,6 +264,8 @@ nft_do_chain_bridge(void *priv, break; } + pkt.thoff += thoff; + return nft_do_chain(&pkt, priv); }
--
2.47.1