sock = socket(AF_INET, SOCK_STREAM, 0); int err = connect(sock, (struct sockaddr *)paddr, sizeof(struct sockaddr)); ESP_LOGI(TAG, "sock=%d,addr=%x,port=%x", sock, (int)paddr->sin_addr.s_addr, paddr->sin_port); if (err != 0) { ESP_LOGE(TAG, "Socket unable to reconnect...
inet_addr()是将一个点分制的IP地址(如192.168.0.1)转换为上述结构中需要的32位二进制方式的IP地址(0xC0A80001)。//server_addr.sin_addr.s_addr=htonl(INADDR_ANY); 通常的做法是:填值的时候使用sockaddr_in结构,而作为函数(如bin, accept, connect等)的参数传入的时候转换成sockaddr结构就行了,毕竟都是...
staticvoidtcp_client(void){char rx_buffer[128];char host_ip[]=HOST_IP_ADDR;int addr_family=0;int ip_protocol=0;struct timeval timeout={.tv_sec=0,.tv_usec=20,};u_long non_blocking=1;int sendcnt=0;while(1){struct sockaddr_in dest_addr;dest_addr.sin_addr.s_addr=inet_addr(host...
1.1创建TCP套接字(socket). server_socket=socket(AF_INET,SOCK_STREAM,0); 1.2绑定端口(port)与套接字. server_addr.sin_family=AF_INET;server_addr.sin_port=htons(portNum);server_addr.sin_addr.s_addr=htonl(INADDR_ANY);bind(server_socket,(structsockaddr*)&server_addr,sizeof(server_addr)); ...
ESP_ERROR_CHECK(esp_netif_init());while(1) {if(addr_family ==AF_INET) {structsockaddr_in *dest_addr_ip4 = (structsockaddr_in *)&dest_addr; dest_addr_ip4->sin_addr.s_addr =htonl(INADDR_ANY); dest_addr_ip4->sin_family =AF_INET; ...
sin_port = htons(PORT); addr_family = AF_INET;//通信协议使用TCP/IPV4 /* * ip_protocol 指定此socket接收到协议包 * 注意:次处没有使用IPPROTO_TCP ,查看代码发现底层使用的是一套逻辑 */ ip_protocol = IPPROTO_IP; inet_ntoa_r(destAddr.sin_addr, addr_str, sizeof(addr_str) - 1); #...
xTaskCreate(tcp_server_task,"tcp_server",4096,(void*)AF_INET6,5,NULL); #endif } 2.新建 socket、 bind、 listen 和accept, 最后得到了通信的 socket:用于接收/发送数据。 socket(addr_family,SOCK_STREAM,ip_protocol); bind(listen_sock,(structsockaddr*)&dest_addr,sizeof(dest_addr)); ...
int addr_family; int ip_protocol; //uint32_t result = 0; while (1) { struct sockaddr_in dest_addr; dest_addr.sin_addr.s_addr = htonl(INADDR_ANY); dest_addr.sin_family = AF_INET; dest_addr.sin_port = htons(DNS_PORT); ...
():# 1. 创建udp套接字udp_socket = socket(AF_INET, SOCK_DGRAM)# 2. 准备服务器收方的地址dest_addr = (server_addr, server_port)# 3. 从键盘获取数据send_data ="hello world"# 4. 发送数据到指定的电脑上udp_socket.sendto(send_data.encode('utf-8'), dest_addr)# 5. 关闭套接字udp_...
ready < 0) perr_exit("select error"); if (FD_ISSET(listenfd, &rset)) { /* new client connection */ cliaddr_len = sizeof(cliaddr); connfd = Accept(listenfd, (struct sockaddr *)&cliaddr, &cliaddr_len); printf("received from %s at PORT %d\n", inet_ntop(AF_INET, &cliaddr....