taglinefilesource code
tcp_connected931net/ipv4/af_inet.cif (sock->state == SS_CONNECTING && tcp_connected(sk->state))
tcp_connected1095net/ipv4/af_inet.cif (!tcp_connected(sk->state)) 
tcp_connected1169net/ipv4/af_inet.cif (!sk || !tcp_connected(sk->state)) 
tcp_connected781net/ipv4/tcp_output.cif (sk->ip_xmit_timeout != TIME_WRITE && tcp_connected(sk->state))