最简单的socket服务器与客户端

服务器:

//服务器
#include <stdio.h>
#include <netinet/in.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <errno.h>
#include <string.h>
int main()
{   
    int listenFd = socket (AF_INET,SOCK_STREAM,0);//创建套接字
    
    struct sockaddr_in serverAddr,clientAddr;//保存网络地址信息的结构体
    memset (&serverAddr,0,sizeof(serverAddr));
    serverAddr.sin_family = AF_INET;//协议族/地址族
    serverAddr.sin_port = htons(atoi("8080"));//保存端口号 atoi(字符串->整形"8080"->8080)
    serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");//IP地址
    
    //绑定本地地址和端口
    int ret = bind (listenFd,(struct sockaddr*)&serverAddr,sizeof(serverAddr));
    ret = listen(listenFd,100);//监听

  int clientFd;
    int cliLen = sizeof (clientAddr);
  while(1){
      clientFd = accept(listenFd,(struct sockaddr*)&clientAddr,&cliLen);
      char buff[1024] = {0};
      ret = read(clientFd,buff,1024);//接收数据,阻塞
     printf ("recv a msg:%s\n",buff);
    close (clientFd);
  }
    close (listenFd);
    return 0;
}

 

客户端:

//客户端
#include <stdio.h>
#include <netinet/in.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <errno.h>
#include <string.h>

int main()
{
    int fd = socket(AF_INET,SOCK_STREAM,0);//创建套接字
//链接服务器 struct sockaddr_in serverAddr; memset (&serverAddr,0,sizeof(serverAddr)); serverAddr.sin_family = AF_INET;//协议族 serverAddr.sin_port = htons(atoi("8080"));//端口号 serverAddr.sin_addr.s_addr = inet_addr ("127.0.0.1");//IP地址 int ret = connect(fd,(struct sockaddr*)&serverAddr,sizeof(serverAddr)); // socket描述符, 服务器地址, socket结构体长度

char buff[1024]={0}; ret = read(0,buff,1024); ret = write(fd,buff,ret-1);//去掉回车 // printf ("send a msg :hello\n"); close(fd); return 0; }

 

posted @ 2018-11-19 15:41  cicero  阅读(1556)  评论(0编辑  收藏  举报