/*server.c*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define port 1234
#define max_que 5
#define buf_size 1024
void sig_child();
pid_t pid;
int main()
printf("socket id = %d\n",socketfd);
local_sockaddr.sin_family = af_inet;
local_sockaddr.sin_port = htons(port);
local_sockaddr.sin_addr.s_addr = htonl(inaddr_any);
printf("server ip =%s\n",inet_ntoa(local_sockaddr.sin_addr));//輸出伺服器ip位址
memset(local_sockaddr.sin_zero,0,8);
int i;
setsockopt(socketfd,sol_socket,so_reuseaddr,&i,sizeof(i));//允許重複使用本地的位址與套接字進行繫結
if(bind(socketfd,(struct sockaddr *)&local_sockaddr,sizeof(struct sockaddr))<0)//繫結函式bind()
printf("bind success!\n");
if(listen(socketfd,max_que)<0)//利用listen()設定被動監聽
printf("listening>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
for( ; ; )
if((pid = fork()) == 0)
printf("receive messages from ip:%s\tport:%d\t:%s\n",client_ip,ntohs(client.sin_port),buf);
if(strcmp(buf,"exit")==0)
memset(buf,0,sizeof(buf));//清空沖區
snprintf(buf,sizeof(buf),"%s","server reply:");
strcat(buf,ctime(&nowtime));
if((sendbytes=send(clientfd,buf,strlen(buf),0))<0)
printf("send reply to client ip :%s port:%d success\n",client_ip,ntohs(client.sin_port));
}close(clientfd);
exit(0);
}close(clientfd);}}
void sig_child(int signo)
/*client.c*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define port 1234
#define buf_size 1024
int main(int argc,char *argv)
if((socketfd=socket(af_inet,sock_stream,0))<0)//建立socket連線
printf("socket id = %d\n",socketfd);
serv_addr.sin_family = af_inet;
serv_addr.sin_port = htons(port);
inet_aton(argv[1], &serv_addr.sin_addr);
memset(serv_addr.sin_zero,0,8);
if(connect(socketfd, (struct sockaddr*)&serv_addr, sizeof(struct sockaddr))< 0) //呼叫connect()函式連線伺服器
else
printf("connect to %s success!\n",argv[1]);
struct sockaddr_in serv, clie;
socklen_t serv_len = sizeof(serv);
socklen_t clie_len = sizeof(clie);
getpeername(socketfd, (struct sockaddr*)&serv, &serv_len);
inet_ntop(af_inet, &serv.sin_addr, serv_ip, sizeof(serv_ip));
printf("server ip:%s\tport:%d\n", serv_ip, ntohs(serv.sin_port));
memset(buf,0,sizeof(buf));
while(1)
if(strcmp(buf,"exit")==0)
memset(buf,0,sizeof(buf));
if((recvbytes = recv(socketfd,buf,buf_size,0))<0)
printf("receive reply from server %s:%s\n",serv_ip,buf);
}close(socketfd);//關閉socket連線
return 0;
}
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