本次实验利用UDP协议, 语言环境为 C/C++ 利用套接字Socket编程,实现Server/CLient 之间简单的通讯。 结果应为类似所示: 下面贴上代码(参考参考...) Server 部分: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 1 /* UDPServer.cpp */ 2 3 #include <stdlib.h> 4 #include <
⏩ 在 user 目录下新建 udpclient.c 文件,并添加如下代码 /***udpclient.c***/#define SERVERADDR "192.168.191.25"//PC端IP地址,确保与ESP8266在同一无线网中#define SERVERPORT 8000///ATaskUdpClient任务voidATaskUdpClient(void*pvParameters){intiVariableExample=0;intfd=-1;intNetTimeOnt=5000;intret...
37. client.c /// Created by gxf on 2020/2/7.//#include<stdio.h>#include<sys/socket.h>#include<arpa/inet.h>#defineBUFSIZE1024intmain(){intclientSocketFd=socket(AF_INET,SOCK_DGRAM,0);structsockaddr_inserverAddr;serverAddr.sin_family=AF_INET;serverAddr.sin_port=htons(1234);serverAddr.s...
C# code using System; using System.Net; using System.Net.Sockets; using System.Text; public class UDPMulticastSender { private static IPAddress GroupAddress = IPAddress.Parse("224.168.100.2"); private static int GroupPort = 11000; private static void Send( String message) { UdpClient sender =...
int clientSocketFd = socket(AF_INET, SOCK_DGRAM, 0); struct sockaddr_in serverAddr; serverAddr.sin_family = AF_INET; serverAddr.sin_port = htons(1234); serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1"); socklen_t addrLen = sizeof(serverAddr); while (1) { char buff[BUFSIZE]...
Client Server|NON[0x01a0]|+--->||| ACK:应答消息,接受到CON消息的响应。 RST:复位消息,当接收者接收到的消息包含一个错误或者不认识消息,接受者不能回ACK消息,必须回RST消息。 CoAP的请求码(requests)和响应码(responses) CoAP的请求码和响应码
(2)client_udp.c /*服务器端的地址*/ char *hostname = "127.0.0.1"; int port = 8888; char * str = "asdsaddyyddddddyydasafdyygfdavas"; void udp_request(int sockfd,const struct sockaddr_in * addr,int len){ char buffer[MAX_MSG_SIZE],recvbuf[MAX_MSG_SIZE]; ...
如果要将数据报发送到其他远程主机,则必须对 方法进行另一次调用 Connect ,或者创建另一个 UdpClient 没有默认远程主机的调用。 如果已建立默认远程主机,并且还在调用 Send 方法时提供远程主机, Send 将引发 SocketException。 如果收到 SocketException,请使用 SocketException.ErrorCode 获取特定的错误代码。 获取此代码...
TRUE, FALSE, L"WebServicesExampleServerStartedEvent"); if (NULL == serverStartedEvent) { wprintf( L"Failed to create the client-server synchronization event (errorCode=0x%lx).\n", GetLastError()); hr = HRESULT_FROM_WIN32(GetLastError()); goto Exit; } // Wait for the server to start...
I am working UDP client server application. In TCP when client disconnected select return 1 and Recv returns 0 which indicated closing of the client.But in Udp select never return 1 and hence it never goes to recvfrom. Here i am posting the server code for handling the client. Please go...