tcp_check_req     361 include/net/tcp.h extern struct sock *		tcp_check_req(struct sock *sk,struct sk_buff *skb,
tcp_check_req    1419 net/ipv4/tcp_ipv4.c 		return tcp_check_req(sk, skb, req, prev);
tcp_check_req    1098 net/ipv6/tcp_ipv6.c 		return tcp_check_req(sk, skb, req, prev);