最近学习了计算机网络通信,这次和大家分享一下
编程模型
Server
创建socket套接字
准备地址(sockaddr_in,本机地址)
绑定(bind)
监听(listen)
等待连接(accept、fork)
接收请求(read/recv)
响应请求(write/send)
关闭(close)
Client
创建socket套接字
准备地址(服务器地址)
…
…
连接(connect)
发送请求(write/send)
接收响应(read/recv)
关闭(close)
以下是我的客户端和服务端
Server
#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
int main()
{
printf("服务器创建socket...\n");
int sockfd = socket(AF_INET,SOCK_STREAM,0);
if(0 > sockfd)
{
perror("socket");
return -1;
}
printf("准备地址...\n");
struct sockaddr_in addr = {};
addr.sin_family = AF_INET;
addr.sin_port = htons(7777);
addr.sin_addr.s_addr = inet_addr("10.1.3.16");
socklen_t len = sizeof(addr);
printf("绑定socket与地址...\n");
if(bind(sockfd,(struct sockaddr*)&addr,len))
{
perror("bind");
return -1;
}
printf("设置监听...\n");
if(listen(sockfd,5))
{
perror("listen");
return -1;
}
printf("等待客户端连接...\n");
for(;;)
{
struct sockaddr_in addrcli = {};
int clifd = accept(sockfd,(struct sockaddr*)&addrcli,&len);
if(0 > clifd)
{
perror("accept");
continue;
}
if(0 == fork())
{
char buf[1024] = {};
for(;;)
{
printf("read:");
read(clifd,buf,sizeof(buf));
printf("%s\n",buf);
if(0 == strcmp("quit",buf))
{
close(clifd);
return 0;
}
printf(">");
gets(buf);
write(clifd,buf,strlen(buf)+1);
}
}
}
}
Clinet
#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
int main()
{
printf("服务器创建socket...\n");
int sockfd = socket(AF_INET,SOCK_STREAM,0);
if(0 > sockfd)
{
perror("socket");
return -1;
}
printf("准备地址...\n");
struct sockaddr_in addr = {};
addr.sin_family = AF_INET;
addr.sin_port = htons(7777);
addr.sin_addr.s_addr = inet_addr("47.98.37.66");
socklen_t len = sizeof(addr);
printf("绑定连接服务器...\n");
if(connect(sockfd,(struct sockaddr*)&addr,len))
{
perror("bind");
return -1;
}
for(;;)
{
char buf[1024] = {};
printf(">");
gets(buf);
write(sockfd,buf,strlen(buf)+1);
if(0 == strcmp("quit",buf))
{
printf("通信结束!\n");
break;
}
printf("read:");
read(sockfd,buf,sizeof(buf));
printf("%s\n",buf);
}
close(sockfd);
}