tcp_ao_len
return round_up(tcp_ao_len(key), 4);
reply_options[0] = htonl((TCPOPT_AO << 24) | (tcp_ao_len(key) << 16) |
(tcp_ao_len(key->ao_key) << 16) |
tcp_ao_len(key->ao_key));
(tcp_ao_len(key->ao_key) << 16) |
(tcp_ao_len(key->ao_key) << 16) |
tcp_ao_len_aligned(key->ao_key) - tcp_ao_len(key->ao_key));