服务端

#include

#include

#include

int main (int agrc,char*argv[])

{

SOCKET socket1;

WSADATA wsaData;

int ErrorCode;

if(WSAStartup(MAKEWORD(2,1),&wsaData))// windows socket dll;

{

printf("Winsock initiate failed!!\n");

WSACleanup();

return 0;

}

printf("Winsock start...\n");

struct sockaddr_in local;

struct sockaddr_in client;

int len = sizeof(client);

local.sin_family = AF_INET;

local.sin_port = htons(12345); //the port need listened

local.sin_addr.s_addr = INADDR_ANY; //localhost

socket1 = socket(AF_INET,SOCK_DGRAM,0);

bind(socket1,(struct sockaddr*)&local,sizeof(local));

while (1)

{

char buffer[1024] = "/0";

printf("waiting message from the clients...\n");

if(recvfrom(socket1,buffer,sizeof(buffer),0,(struct sockaddr*)&client,&len) != SOCKET_ERROR)

{

printf("recevie message: [%s]---%s\n",inet_ntoa(client.sin_addr),buffer);

//send sth to the client

sendto(socket1,buffer,sizeof(buffer),0,(struct sockaddr*)&client,len);

}

}

closesocket(socket1);

system("pause");

return 0;

}

客户端:

#include

#include

#include

int main (int agrc,char*argv[])

{

SOCKET socket1;

WSADATA wsaData;

int ErrorCode;

if(WSAStartup(MAKEWORD(2,1),&wsaData))// windows socket dll;

{

printf("Winsock initiate failed!!\n");

WSACleanup();

return 0;

}

printf("Winsock start...\n");

const char* ip="127.0.0.1";

struct sockaddr_in server;

int len = sizeof(server);

server.sin_family = AF_INET;

server.sin_port = htons(12345); //the port need listened

server.sin_addr.s_addr = inet_addr(ip);

socket1 = socket(AF_INET,SOCK_DGRAM,0);

while (1)

{

char buffer[1024] = "\0";

printf("input message\n");

scanf("%s",buffer);

//printf("%s",buffer);

if(strcmp(buffer,"bye")==0)

{

printf("exit,bye!!\n");

Sleep(100);

closesocket(socket1);

break;

}

if(sendto(socket1,buffer,sizeof(buffer),0,(struct sockaddr*)&server,len)!=SOCKET_ERROR)

{

printf("sending...");

Sleep(100);

if(recvfrom(socket1,buffer,sizeof(buffer),0,(struct sockaddr*)&server,&len) != SOCKET_ERROR)

printf("recevie from service: %s\n",buffer);

}

}

closesocket(socket1);

system("pause");

return 0;

}

注意： Makefile 加上  -lws2_32