diff options
| author | Balazs Scheidler <bazsi77@gmail.com> | 2020-08-29 08:19:15 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-08-29 13:04:44 +0200 |
| commit | 67407a406db337acdaabecd3747d160d89a929e4 (patch) | |
| tree | 059b4770c779b9599f2289c1f2d9030f8b757afd /net/netfilter/nft_socket.c | |
| parent | f5143e10a2e41f70ed6b1f3bbd8119ede5240c80 (diff) | |
netfilter: nft_socket: add wildcard support
Add NFT_SOCKET_WILDCARD to match to wildcard socket listener.
Signed-off-by: Balazs Scheidler <bazsi77@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nft_socket.c')
| -rw-r--r-- | net/netfilter/nft_socket.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/net/netfilter/nft_socket.c b/net/netfilter/nft_socket.c index 637ce3e8c575..a28aca5124ce 100644 --- a/net/netfilter/nft_socket.c +++ b/net/netfilter/nft_socket.c @@ -14,6 +14,25 @@ struct nft_socket { }; }; +static void nft_socket_wildcard(const struct nft_pktinfo *pkt, + struct nft_regs *regs, struct sock *sk, + u32 *dest) +{ + switch (nft_pf(pkt)) { + case NFPROTO_IPV4: + nft_reg_store8(dest, inet_sk(sk)->inet_rcv_saddr == 0); + break; +#if IS_ENABLED(CONFIG_NF_TABLES_IPV6) + case NFPROTO_IPV6: + nft_reg_store8(dest, ipv6_addr_any(&sk->sk_v6_rcv_saddr)); + break; +#endif + default: + regs->verdict.code = NFT_BREAK; + return; + } +} + static void nft_socket_eval(const struct nft_expr *expr, struct nft_regs *regs, const struct nft_pktinfo *pkt) @@ -59,6 +78,13 @@ static void nft_socket_eval(const struct nft_expr *expr, return; } break; + case NFT_SOCKET_WILDCARD: + if (!sk_fullsock(sk)) { + regs->verdict.code = NFT_BREAK; + return; + } + nft_socket_wildcard(pkt, regs, sk, dest); + break; default: WARN_ON(1); regs->verdict.code = NFT_BREAK; @@ -97,6 +123,7 @@ static int nft_socket_init(const struct nft_ctx *ctx, priv->key = ntohl(nla_get_u32(tb[NFTA_SOCKET_KEY])); switch(priv->key) { case NFT_SOCKET_TRANSPARENT: + case NFT_SOCKET_WILDCARD: len = sizeof(u8); break; case NFT_SOCKET_MARK: |