cli.c
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#define PORT 3000
int main()
{
//创建套接字
int sockfd;
sockfd = socket(PF_INET,SOCK_DGRAM,0);
if(sockfd == -1)
{
printf("创建套接字失败!\n");
return -1;
}
else
printf("创建套接字成功,套接字描述符为%d.\n",sockfd);
//绑定ip和端口
struct sockaddr_in ser_addr;
bzero(&ser_addr,sizeof(struct sockaddr_in));
ser_addr.sin_family = AF_INET;
ser_addr.sin_port = htons(PORT);
ser_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
//向服务端发送信息
char buf[128];
int size;
socklen_t len;
while(1)
{
printf("输入信息:");
fgets(buf,128,stdin);
size = sendto(sockfd,buf,strlen(buf),0,(struct sockaddr *)&ser_addr,sizeof(struct sockaddr));
if(size == -1)
{
printf("向服务端发送信息失败!\n");
break;
}
else
{
buf[size] = '\0';
printf("客户端:%s",buf);
if(strncmp(buf,"Q",1) == 0)
{
printf("退出交互!\n");
break;
}
}
}
close(sockfd);
return 0;
}
ser.c
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#define PORT 3000
int main()
{
//创建套接字
int sockfd;
sockfd = socket(PF_INET,SOCK_DGRAM,0);
if(sockfd == -1)
{
printf("创建套接字失败!\n");
return -1;
}
else
printf("创建套接字成功,套接字描述符为%d.\n",sockfd);
//绑定ip和端口
struct sockaddr_in ser_addr;
bzero(&ser_addr,sizeof(struct sockaddr_in));
ser_addr.sin_family = AF_INET;
ser_addr.sin_port = htons(PORT);
ser_addr.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind(sockfd,(struct sockaddr *)&ser_addr,sizeof(struct sockaddr)) == -1)
{
printf("绑定ip和端口失败!\n");
close(sockfd);
return -1;
}
else
printf("绑定端口成功!\n");
//等待客户端的交互
char buf[128];
int size;
struct sockaddr_in cli_addr;
socklen_t len;
while(1)
{
size = recvfrom(sockfd,buf,128,0,(struct sockaddr*)&cli_addr,&len);
if(size == -1)
{
printf("接受客户端信息失败!\n");
break;
}
else if(strcmp(buf,"\0") == 0)
continue;
else
{
buf[size] = '\0';
printf("来自客户端的信息:%s",buf);
//printf("%s",buf);
if(strncmp(buf,"Q",1) == 0)
{
printf("退出交互!\n");
break;
}
}
}
close(sockfd);
return 0;
}