昨天弄了sublime之后没有弄输入中文的了，学生党来着，刚好可以练练英语（英语渣渣，还要考六级），所以注释都写英文的（语法什么的就别太深究了）
服务器端：
/*start from the very beginning,and create greatness
@name:Chuangwei Lin
@E-mail:979951191@qq.com
@brief:a simple example about server/client link(server c file)
*/
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <linux/in.h>
#define PORT 8888 //port to listen
#define BACKLOG 2 //the length of listen queue
void process_conn_server(int s);
int main(int argc, char const *argv[])
{
int ss,sc; //ss:server's socket file descriptor;sc:client's socket file descriptor
struct sockaddr_in server_addr; //server's address struct
struct sockaddr_in client_addr; //use to save client's address
int err; //the return value
pid_t pid; //the process ID
//create a socket
ss = socket(AF_INET,SOCK_STREAM,0);
if (ss < 0) //error
{
printf("socket error
");
return -1;
}
//set the server address
bzero(&server_addr,sizeof(server_addr)); //clear
server_addr.sin_family = AF_INET; //protocol family
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);//local address
server_addr.sin_port = htons(PORT); //server port
//binging
err = bind(ss,(struct sockaddr*)&server_addr,sizeof(server_addr));
if (err < 0)
{
printf("bind error
");
return -1;
}
//listening
err = listen(ss,BACKLOG);
if (err < 0)
{
printf("listen error
");
return -1;
}
//the main loop
for (;;)
{
int addrlen = sizeof (struct sockaddr);
sc = accept(ss,(struct sockaddr*)&client_addr,&addrlen); //accept the client's connecting
if (sc < 0)
{
continue; //if error,finish this time loop
}
//create a new process to process the connecting
pid = fork();
if (0 == pid)
{
close(ss); //close listen in the child process
process_conn_server(sc); // process
}
else
{
close(sc); //close accept in the parent process
}
}
return 0;
}
//the process function
void process_conn_server(int s)
{
ssize_t size = 0 ;
char buffer[1024]; //data buffer
for(;;)
{
size = read(s,buffer,1024); //read data from socket and put in buffer
if (0 ==size) //if no data
{
return; //return
}
sprintf(buffer,"%d bytes altogether
",size); //send the number of data return
write(s,buffer,strlen(buffer)+1);
}
}客户端：
/*start from the very beginning,and create greatness
@name:Chuangwei Lin
@E-mail:979951191@qq.com
@brief:a simple example about server/client link(client c file)
*/
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <linux/in.h>
#define PORT 8888 //port to listen
void process_conn_client(int s);
int main(int argc, char const *argv[])
{
int s; //s:socket descriptor
struct sockaddr_in server_addr; // server address
int err;
//create a socket
s = socket(AF_INET,SOCK_STREAM,0);
if (s < 0)
{
printf("socket error
");
return -1;
}
//set the server address
bzero(&server_addr,sizeof(server_addr));
server_addr.sin_family = AF_INET; //protocol family
server_addr.sin_addr.s_addr = htonl(INADDR_ANY); //local address
server_addr.sin_port = htons(PORT); //server port
//change the user input char IP to int
inet_pton(AF_INET,argv[1],&server_addr.sin_addr);
//conneting the server
connect(s,(struct sockaddr*)&server_addr,sizeof(struct sockaddr));
process_conn_client(s);
close(s);
return 0;
}
void process_conn_client(int s)
{
ssize_t size = 0 ;
char buffer[1024]; //data buffer
for(;;)
{
//get data from standard input
size = read (0,buffer,1024);
if(size > 0)
{
write(s,buffer,size); //send to server
size = read(s,buffer,1024); //read from server
write(1,buffer,size); //write to standard output
}
}
}很简单的一段，只是建立连接然后客户端发送字符然后服务器统计后返回