linux-windows下socket通信

 

//linux下

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#define MYPORT 3333
#define BACKLOG 10
main()
{
int sockfd, new_fd;
struct sockaddr_in my_addr;
struct sockaddr_in their_addr;
int sin_size;
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(MYPORT);
my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
bzero(&(my_addr.sin_zero),0);
if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))== -1) {
perror("bind");
exit(1);
}
if (listen(sockfd, BACKLOG) == -1) {
perror("listen");
exit(1);
}
while(1) {
sin_size = sizeof(struct sockaddr_in);
if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr,&sin_size)) == -1) {
perror("accept");
continue;
}
printf("server: got connection from %s\n",inet_ntoa(their_addr.sin_addr));
if (!fork()) {
if (send(new_fd, "Hello, world!\n", 14, 0) == -1)
perror("send");
close(new_fd);
exit(0);
}
close(new_fd);
while(waitpid(-1,NULL,WNOHANG) > 0);
}
}

//windows下控制檯程序，需要注意加鏈接庫ws2_32.lib

#include<Winsock2.h>
#include<stdio.h>
void main(){
int i;
char recvBuffer[255];
WORD wVersionRequested; //typedef unsigned short WORD; 2字節
WSADATA wsaData;
//WSADATA 包含了Windows Socket執行的信息。
int err;
wsaData.wVersion =MAKEWORD(1,1);
//這個宏創建一個被指定變量連接而成的WORD變量。返回一個WORD變量。
//第一個是socket庫版本，第二個是取得的版本號。
err=WSAStartup(wVersionRequested,&wsaData); //return 0 if successful
if(err!=0){
printf("Call WSAStart ERROR!");
exit(1);
} //終止對WinSock庫的使用
//if(LOBYTE(wsaData.wVersion)!=1|| HIBYTE(wsaData.wHighVersion)!=1)
//{
// WSACleanup();
// exit(0);
//}
//typedef u_int SOCKET;//創建用與監聽的套接字
SOCKET SocketClient=socket(AF_INET,SOCK_STREAM,0); //0表示讓系統自己選擇協議
//定義地址結構體//填入服務器端的ip地址和端口號
SOCKADDR_IN addrSrv;
//轉換爲TCP/IP network byte order //32bit
addrSrv.sin_addr.S_un.S_addr=inet_addr("192.168.0.206"); //ip 192.168.0.130
addrSrv.sin_family=AF_INET; //family address
addrSrv.sin_port=htons(3333); //16bit端口號
printf("Connect to server...\n");
i=connect(SocketClient,(sockaddr *)&addrSrv,sizeof(SOCKADDR_IN)); //指向要建立連接的數據結構
if(i<0){
printf("%i\n",WSAGetLastError());
printf("連接到192.168.0.130:25000錯誤!");
exit(1);
}
recv(SocketClient,recvBuffer,255,0);
printf("%s\n",recvBuffer); //send(socketClient,recvBuffer,20,0);
closesocket(SocketClient);
WSACleanup();
return;
}