#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<string.h>
#include<ctype.h>
#include<arpa/inet.h>
#define SERVER_PORT 8989
int main()
{
int server_sock,client_sock;
struct sockaddr_in server_addr,client_addr;
bzero(&server_addr,sizeof(server_addr));
bzero(&client_addr,sizeof(client_addr));
server_sock = socket(AF_INET,SOCK_STREAM,0);//选择tcp
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
server_addr.sin_port = htons(SERVER_PORT);
server_addr.sin_family = AF_INET;
if(-1 == bind(server_sock,(struct sockaddr *)&server_addr,sizeof(server_addr)))
{
printf("bind error");
return -1;
}
if(-1 == listen(server_sock,64))
{
printf("listen error");
return -1;
}
printf("wait client connect...\n");
int done = 1;
while(done)
{
socklen_t client_addr_len = sizeof(client_addr);
char client_ip[64];
char buf[256];
int len;
client_sock = accept(server_sock,(struct sockaddr *)&client_addr,&client_addr_len);//此处的长度是一个socklen_t指针类型的形参
if(-1 == client_sock)
{
printf("client_sock error");
return -1;
}
printf("client IP:%s\t client port: %d\n",
inet_ntop(AF_INET,&client_addr.sin_addr.s_addr,client_ip,sizeof(client_ip)),
ntohs(client_addr.sin_port));
len = read(client_sock,buf,sizeof(buf)-1);//返回 读出的长度
buf[len] = '\0';
printf("receive: %s\n",buf);
len = write(client_sock, buf, len);
if(len < 0)
{
printf("write error\n");
}
close(client_sock);
}
close(server_sock);
return 0;
}
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