4  * SPDX-License-Identifier: Apache-2.0
26 	[0] = { .fd = -1 }, /* UDP socket */
29 	[0] = { .fd = -1 }, /* TCP socket */
41 	/* Note that in this application we receive / send data from  in tcp_service_handler()
42 	 * system work queue. In proper application the socket reading and data  in tcp_service_handler()
62 	struct pollfd *pfd = &pev->event;  in receive_data()
63 	int client = pfd->fd;  in receive_data()
73 			LOG_ERR("recv: %d", -errno);  in receive_data()
78 			sockfd_tcp[0].fd = -1;  in receive_data()
103 			LOG_ERR("sendto: %d", -errno);  in receive_data()
108 		len -= out_len;  in receive_data()
115 	int ret, sock, opt;  in setup_tcp_socket()  local
119 		LOG_ERR("socket: %d", -errno);  in setup_tcp_socket()
120 		return -errno;  in setup_tcp_socket()
123 	ret = getsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &opt, &optlen);  in setup_tcp_socket()
124 	if (ret == 0 && opt) {  in setup_tcp_socket()
127 		opt = 0;  in setup_tcp_socket()
128 		ret = setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &opt, optlen);  in setup_tcp_socket()
137 		LOG_ERR("bind: %d", -errno);  in setup_tcp_socket()
138 		return -errno;  in setup_tcp_socket()
142 		LOG_ERR("listen: %d", -errno);  in setup_tcp_socket()
143 		return -errno;  in setup_tcp_socket()
152 	int ret, sock, opt;  in setup_udp_socket()  local
156 		LOG_ERR("socket: %d", -errno);  in setup_udp_socket()
157 		return -errno;  in setup_udp_socket()
160 	ret = getsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &opt, &optlen);  in setup_udp_socket()
161 	if (ret == 0 && opt) {  in setup_udp_socket()
164 		opt = 0;  in setup_udp_socket()
165 		ret = setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &opt, optlen);  in setup_udp_socket()
174 		LOG_ERR("bind: %d", -errno);  in setup_udp_socket()
175 		return -errno;  in setup_udp_socket()
211 	LOG_INF("Single-threaded TCP/UDP echo server waits "  in main()
222 			LOG_ERR("accept: %d", -errno);  in main()