63     if (sockfd_ >= 0) {  in init()
89     sockfd_ = mk::net::socket_create(family, SOCK_DGRAM, 0, logger);  in init()
90     if (sockfd_ == -1) {  in init()
96     if (setsockopt(sockfd_, level_sock, opt_recverr, &val, sizeof(val)) != 0 ||  in init()
97         setsockopt(sockfd_, level_proto, opt_recvttl, &val, sizeof(val)) != 0 ||  in init()
98         setsockopt(sockfd_, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) != 0) {  in init()
109     if (bind(sockfd_, (sockaddr *)&ss, sslen) != 0) {  in init()
128     if (sockfd_ < 0) {  in send_probe()
149     if (setsockopt(sockfd_, ipproto, ip_ttl, &ttl, sizeof(ttl)) != 0) {  in send_probe()
171     if (sendto(sockfd_, payload.data(), payload.length(), 0, (sockaddr *)&ss,  in send_probe()
178     reactor->pollin_once(sockfd_, timeout, [this](Error err) {  in send_probe()
222     if ((r.recv_bytes = recvmsg(sockfd_, &msg, MSG_ERRQUEUE)) < 0) {  in on_socket_readable()
227             if ((r.recv_bytes = recvfrom(sockfd_, buff, sizeof(buff), 0,  in on_socket_readable()
364     if (sockfd_ >= 0) {  in cleanup()
365         ::close(sockfd_);  in cleanup()
366         sockfd_ = -1;  in cleanup()