UDP通讯例程

UDP_client/.gitignore

+Build
+/Debug/*
+*.log
+/release/*
+/Release/*
+/.vs/*
+/x64/*
+/x86/*
+doc/rtf/
+doc/latex/
+doc/html/

UDP_client/CMakeLists.txt

+cmake_minimum_required(VERSION 3.0.0)
+project(helloword VERSION 0.1.0)
+
+#reset output path
+set ( EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin )
+set ( LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/lib )
+
+include(CTest)
+enable_testing()
+
+#set include file
+include_directories (./inc)
+
+#set source file
+aux_source_directory ( . DIR_USR_SOURCE ) 
+aux_source_directory ( ./src DIR_USR_SOURCE )
+
+# find_library(WSOCK32_LIBRARY wsock32)
+# find_library(WS2_32_LIBRARY ws2_32)
+
+# add_executable(helloword main.cpp)
+add_executable ( ${CMAKE_PROJECT_NAME} ${DIR_USR_SOURCE} )
+if(WIN32)
+target_link_libraries(${CMAKE_PROJECT_NAME} wsock32 ws2_32)
+endif()
+
+set(CPACK_PROJECT_NAME ${PROJECT_NAME})
+set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
+include(CPack)

UDP_client/main.cpp

+#include <winsock2.h>  
+#include <stdio.h>
+#include <tchar.h> 
+#include <iostream>  
+
+#pragma comment(lib,"ws2_32.lib")  
+#define PORT 8050 //自己的端口  
+  
+int _tmain(int argc, _TCHAR* argv[])  
+{  
+    //UDP客户端  
+    WSADATA wsaData={0};  
+    int iResult = WSAStartup(0x0202,&wsaData);  
+  
+    SOCKET sock = socket(AF_INET,SOCK_DGRAM,0);//UDP协议类型  
+  
+    SOCKADDR_IN sa={AF_INET,htons(PORT)};  
+    int n = bind(sock,(sockaddr*)&sa,sizeof(sa));//绑定端口，可以不填端口  
+  
+  
+    SOCKADDR_IN to={AF_INET};  
+    to.sin_port = htons(9000);                   //对方端口  
+    to.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); //对方IP地址  
+    int a = sendto(sock,"hello",5,0,(sockaddr*)&to,sizeof(to));  
+  
+}

UDP_server/.gitignore

+Build
+/Debug/*
+*.log
+/release/*
+/Release/*
+/.vs/*
+/x64/*
+/x86/*
+doc/rtf/
+doc/latex/
+doc/html/

UDP_server/.vscode/c_cpp_properties.json

+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ],
+            "compilerPath": "D:\\software\\TDM-GCC\\TDM-GCC\\bin\\gcc.exe",
+            "cStandard": "gnu11",
+            "cppStandard": "gnu++98",
+            "intelliSenseMode": "windows-gcc-x64",
+            "configurationProvider": "ms-vscode.cmake-tools"
+        }
+    ],
+    "version": 4
+}
\ No newline at end of file

UDP_server/CMakeLists.txt

+cmake_minimum_required(VERSION 3.0.0)
+project(helloword VERSION 0.1.0)
+
+#reset output path
+set ( EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin )
+set ( LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/lib )
+
+include(CTest)
+enable_testing()
+
+#set include file
+include_directories (./inc)
+
+#set source file
+aux_source_directory ( . DIR_USR_SOURCE ) 
+aux_source_directory ( ./src DIR_USR_SOURCE )
+
+# find_library(WSOCK32_LIBRARY wsock32)
+# find_library(WS2_32_LIBRARY ws2_32)
+
+# add_executable(helloword main.cpp)
+add_executable ( ${CMAKE_PROJECT_NAME} ${DIR_USR_SOURCE} )
+if(WIN32)
+target_link_libraries(${CMAKE_PROJECT_NAME} wsock32 ws2_32)
+endif()
+
+set(CPACK_PROJECT_NAME ${PROJECT_NAME})
+set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
+include(CPack)

UDP_server/main.cpp

+//#include "stdafx.h" 
+#include <stdio.h>
+
+#include <tchar.h> 
+#include <winsock2.h>  
+#include <iostream>  
+#pragma comment(lib,"ws2_32.lib")  
+#define  PORT 9000  //对外服务端口  
+  
+using namespace  std;  
+  
+int _tmain(int argc, _TCHAR* argv[])  
+{  
+    WSADATA wsaData={0};  
+    int iResutl = WSAStartup(0x0202,&wsaData);  
+  
+    SOCKET sock = socket(AF_INET,SOCK_DGRAM,0);  
+    if(sock == INVALID_SOCKET)  
+    {  
+        cout <<"创建套接字失败！" <<endl;  
+    }  
+  
+    sockaddr_in sa     ={AF_INET};  
+    sa.sin_port        = htons(PORT);//开放给外部的端口  
+    sa.sin_addr.s_addr = 0;          //本机地址  
+    int n = bind(sock,(sockaddr*)&sa,sizeof(sa));  
+    if(SOCKET_ERROR == n)  
+    {  
+        cout << "端口绑定失败！"<<endl;  
+    }  
+  
+    cout << "UDP服务器启动" <<endl;  
+    char buff[1000]={0};  
+  
+    sockaddr_in form;  
+    int len = sizeof(form);  
+    int ret = 0;  
+    while(ret =recvfrom(sock,buff,1000,0,(sockaddr*)&form,&len))  
+    {  
+        cout << "IP地址来自:" << inet_ntoa(form.sin_addr) <<"端口:"<< 
+        htons(form.sin_port) <<endl; 
+         
+        cout << buff << endl;  
+        memset(buff,0,1000);  
+    }  
+      
+    return 0;  
+}