netfilter: Decrease code duplication regarding transparent socket option
There is a function in include/net/netfilter/nf_socket.h to decide if a
socket has IP(V6)_TRANSPARENT socket option set or not. However this
does the same as inet_sk_transparent() in include/net/tcp.h
include/net/tcp.h:1733
/* This helper checks if socket has IP_TRANSPARENT set */
static inline bool inet_sk_transparent(const struct sock *sk)
{
switch (sk->sk_state) {
case TCP_TIME_WAIT:
return inet_twsk(sk)->tw_transparent;
case TCP_NEW_SYN_RECV:
return inet_rsk(inet_reqsk(sk))->no_srccheck;
}
return inet_sk(sk)->transparent;
}
tproxy_sk_is_transparent has also been refactored to use this function
instead of reimplementing it.
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/net/netfilter/nft_socket.c b/net/netfilter/nft_socket.c
index d863370..f28a0b9 100644
--- a/net/netfilter/nft_socket.c
+++ b/net/netfilter/nft_socket.c
@@ -5,6 +5,7 @@
#include <net/netfilter/nf_tables_core.h>
#include <net/netfilter/nf_socket.h>
#include <net/inet_sock.h>
+#include <net/tcp.h>
struct nft_socket {
enum nft_socket_keys key:8;
@@ -48,7 +49,7 @@ static void nft_socket_eval(const struct nft_expr *expr,
switch(priv->key) {
case NFT_SOCKET_TRANSPARENT:
- nft_reg_store8(dest, nf_sk_is_transparent(sk));
+ nft_reg_store8(dest, inet_sk_transparent(sk));
break;
default:
WARN_ON(1);
