GTP_ECHO_RSP
if (msg_type == GTP_ECHO_RSP)
gtp0_build_echo_msg(>p_pkt->gtp0_h, GTP_ECHO_RSP);
if (gtp0->type == GTP_ECHO_RSP && gtp->sk_created)
if (msg_type == GTP_ECHO_RSP) {
gtp1u_build_echo_msg(>p_pkt->gtp1u_h, GTP_ECHO_RSP);
if (gtp1->type == GTP_ECHO_RSP && gtp->sk_created)