diff options
| -rw-r--r-- | include/net/tcp.h | 1 | ||||
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 3 | ||||
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 4 |
3 files changed, 6 insertions, 2 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 8e9c28dccb80..30fe98bc8957 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1592,6 +1592,7 @@ struct tcp_sock_af_ops { }; struct tcp_request_sock_ops { + u16 mss_clamp; #ifdef CONFIG_TCP_MD5SIG struct tcp_md5sig_key *(*md5_lookup) (struct sock *sk, struct request_sock *req); diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 597dd9d75210..499d440539ad 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1265,6 +1265,7 @@ struct request_sock_ops tcp_request_sock_ops __read_mostly = { }; static const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = { + .mss_clamp = TCP_MSS_DEFAULT, #ifdef CONFIG_TCP_MD5SIG .md5_lookup = tcp_v4_reqsk_md5_lookup, .calc_md5_hash = tcp_v4_md5_hash_skb, @@ -1324,7 +1325,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb) af_ops = tcp_rsk(req)->af_specific = &tcp_request_sock_ipv4_ops; tcp_clear_options(&tmp_opt); - tmp_opt.mss_clamp = TCP_MSS_DEFAULT; + tmp_opt.mss_clamp = af_ops->mss_clamp; tmp_opt.user_mss = tp->rx_opt.user_mss; tcp_parse_options(skb, &tmp_opt, 0, want_cookie ? NULL : &foc); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 41389bbb08c0..ad658332cf7d 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -754,6 +754,8 @@ struct request_sock_ops tcp6_request_sock_ops __read_mostly = { }; static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = { + .mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - + sizeof(struct ipv6hdr), #ifdef CONFIG_TCP_MD5SIG .md5_lookup = tcp_v6_reqsk_md5_lookup, .calc_md5_hash = tcp_v6_md5_hash_skb, @@ -1047,7 +1049,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb) af_ops = tcp_rsk(req)->af_specific = &tcp_request_sock_ipv6_ops; tcp_clear_options(&tmp_opt); - tmp_opt.mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr); + tmp_opt.mss_clamp = af_ops->mss_clamp; tmp_opt.user_mss = tp->rx_opt.user_mss; tcp_parse_options(skb, &tmp_opt, 0, want_cookie ? NULL : &foc); |