diff options
| author |   Eric Dumazet <edumazet@google.com> | 2015-10-02 11:43:28 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-10-03 04:32:38 -0700 |
| commit | ba8e275a457397ab06f3567cf7bef0d78a43ae7e (patch) | |
| tree | b23c8ea809c70a80e3f1fa0ef9935e8600d739ff /net | |
| parent | tcp/dccp: init sk_prot and call sk_node_init() in reqsk_alloc() (diff) | |
| download | linux-dev-ba8e275a457397ab06f3567cf7bef0d78a43ae7e.tar.xz linux-dev-ba8e275a457397ab06f3567cf7bef0d78a43ae7e.zip | |
tcp: cleanup tcp_v[46]_inbound_md5_hash()
We'll soon have to call tcp_v[46]_inbound_md5_hash() twice.
Also add const attribute to the socket, as it might be the
unlocked listener for SYN packets.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 16 | ||||
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 10 |
2 files changed, 12 insertions, 14 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 2fb0945b9d83..56f8c6395966 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1112,10 +1112,13 @@ clear_hash_noput: } EXPORT_SYMBOL(tcp_v4_md5_hash_skb); +#endif + /* Called with rcu_read_lock() */ -static bool tcp_v4_inbound_md5_hash(struct sock *sk, +static bool tcp_v4_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb) { +#ifdef CONFIG_TCP_MD5SIG /* * This gets called for each TCP segment that arrives * so we want to be efficient. @@ -1165,8 +1168,9 @@ static bool tcp_v4_inbound_md5_hash(struct sock *sk, return true; } return false; -} #endif + return false; +} static void tcp_v4_init_req(struct request_sock *req, const struct sock *sk_listener, @@ -1607,16 +1611,8 @@ process: if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) goto discard_and_relse; -#ifdef CONFIG_TCP_MD5SIG - /* - * We really want to reject the packet as early as possible - * if: - * o We're expecting an MD5'd packet and this is no MD5 tcp option - * o There is an MD5 option and we're not expecting one - */ if (tcp_v4_inbound_md5_hash(sk, skb)) goto discard_and_relse; -#endif nf_reset(skb); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index e463583c39ee..65e797dba504 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -622,8 +622,12 @@ clear_hash_noput: return 1; } -static bool tcp_v6_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb) +#endif + +static bool tcp_v6_inbound_md5_hash(const struct sock *sk, + const struct sk_buff *skb) { +#ifdef CONFIG_TCP_MD5SIG const __u8 *hash_location = NULL; struct tcp_md5sig_key *hash_expected; const struct ipv6hdr *ip6h = ipv6_hdr(skb); @@ -660,9 +664,9 @@ static bool tcp_v6_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb) &ip6h->daddr, ntohs(th->dest)); return true; } +#endif return false; } -#endif static void tcp_v6_init_req(struct request_sock *req, const struct sock *sk_listener, @@ -1408,10 +1412,8 @@ process: tcp_v6_fill_cb(skb, hdr, th); -#ifdef CONFIG_TCP_MD5SIG if (tcp_v6_inbound_md5_hash(sk, skb)) goto discard_and_relse; -#endif if (sk_filter(sk, skb)) goto discard_and_relse; |