From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Allow packet redirection to another interface upon egress.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
[lukas: set skb_iif, add commit message]
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
---
net/netfilter/nft_fwd_netdev.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nft_fwd_netdev.c b/net/netfilter/nft_fwd_netdev.c
index cd59afde5b2f..fa9301ca6033 100644
--- a/net/netfilter/nft_fwd_netdev.c
+++ b/net/netfilter/nft_fwd_netdev.c
@@ -27,9 +27,11 @@ static void nft_fwd_netdev_eval(const struct nft_expr *expr,
{
struct nft_fwd_netdev *priv = nft_expr_priv(expr);
int oif = regs->data[priv->sreg_dev];
+ struct sk_buff *skb = pkt->skb;
/* This is used by ifb only. */
- skb_set_redirected(pkt->skb, true);
+ skb->skb_iif = skb->dev->ifindex;
+ skb_set_redirected(skb, nft_hook(pkt) == NF_NETDEV_INGRESS);
nf_fwd_netdev_egress(pkt, oif);
regs->verdict.code = NF_STOLEN;
@@ -198,7 +200,8 @@ static int nft_fwd_validate(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nft_data **data)
{
- return nft_chain_validate_hooks(ctx->chain, (1 << NF_NETDEV_INGRESS));
+ return nft_chain_validate_hooks(ctx->chain, (1 << NF_NETDEV_INGRESS) |
+ (1 << NF_NETDEV_EGRESS));
}
static struct nft_expr_type nft_fwd_netdev_type;
--
2.33.0
