// 发送数据 DatagramPacketsendPacket=newDatagramPacket(feedback,feedback.length,packet.getAddress(), BROADCAST_PORT); 这里需要指定端口为BROADCAST_PORT,因为DISCOVER_REQUEST报文的的端口是随机的。不然无法在BROADCAST_PORT端口接收到DISCOVER_RESPONSE报文,新加入局域网的设备就无法感知其他设备的存在。 2、广播发送...
32 addrto.sin_addr.s_addr=htonl(INADDR_BROADCAST);//套接字地址为广播地址 33 addrto.sin_port=htons(6000);//套接字广播端口号为6000 34 int nlen=sizeof(addrto); 35 while(1) 36 { 37 sleep(1); 38 char msg[]={"the message broadcast"}; 39 int ret=sendto(sock,msg,strlen(msg),0...
inet_pton(AF_INET, server_ip, &dest_addr.sin_addr); printf("send data to UDP server %s : %d\n", server_ip, port); // 设置为广播类型 int opt = 1; setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &opt, sizeof(opt)); char send_buf[512] = "hello"; // 发送数据到同一个网段的其...
thrownewArgumentOutOfRangeException("localPort is out of range"); this.localHost = localHost; this.localPort = localPort; try { socket =newSocket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); //设置广播 socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast,true...
setsockopt(send_fd,SOL_SOCKET,SO_BROADCAST,&on,sizeof(on));//允许发送广播数据包 broadcast_addr.sin_family = AF_INET; broadcast_addr.sin_port = htons(8090); broadcast_addr.sin_addr.s_addr = inet_addr("192.168.56.255"); broadcast_len = sizeof(broadcast_addr); ...
&addrClient, sizeof(addrClient))){printf ("bind failed.ip=[%s] errno=[%d]\n", szIp, WSAGetLastError());}SOCKADDR_IN addrServer = {0}; addrServer.sin_family = AF_INET;addrServer.sin_addr.s_addr = htonl ( INADDR_BROADCAST );addrServer.sin_port = htons (10001); int...
其实UDP广播就是向255.255.255.255发送数据,接收端只需绑定UDP广播的端口号即可。 发送端,发送的地址,255.255.255.255:Port,即,IPAddress.Broadcast:Port 接收端,接收的地址,0.0.0.0:Port,即,IPAddress.Any:Port 代码语言:javascript 复制 using System; using System.Collections.Generic; using System.Linq; using ...
UDP Header，VxLAN协议规范指出：Destination Port使用固定端口号（协议端口），Source Port可以使用固定端口...
广播(broadcast):数据报文从一个发送端到所有接收端的通信方式。 组播的实现需要设置组播地址 在IPv4中组播的地址范围是:224.0.0.0到239.255.255.255。 二,组播的具体实现过程 发送端: step.01:新建一个socket套接字1用于往组播发送数据报文。 step.02:在sockaddr_in结构体中初始化组播的端口号。
;cliaddrlen=sizeof(cliaddr);//len is value/resultwhile(running_local_port_udpserver_flag){shared_ptr<P2PBroadcastCommand>req_message;memset(buffer,0x00,MAXLINE);ret=recv_with_timeout(local_command_sockfd,buffer,MAXLINE-1,&len_recv,&cliaddr,&cliaddrlen);if(ret!=SOCKET_RECV_SUCCESS){sleep_...