原文转载:http://blog.csdn.net/dlutcat/article/details/1813933 作者：dlutcat
服务器端程序的编译
gcc -o multi_thread_server multi_thread_server -lpthread
客户端程序的编译
gcc -o multi_thread_client multi_thread_client.c -lpthread
服务器程序和客户端程应当分别运行在2台计算机上.
服务器端程序的运行,在一个计算机的终端执行
./multi_thread_server
客户端程序的运行,在另一个计算机的终端中执行
./multi_thread_client 运行服务器程序的计算机的IP地址
在实际编程和测试中,可以用2个终端代替2个计算机,这样就可以在一台计算机上测试网络程序,
服务器端程序的运行,在一个终端执行
./multi_thread_server
客户端程序的运行,在另一个终端中执行
./multi_thread_client 127.0.0.1
说明: 任何计算机都可以通过127.0.0.1访问自己. 也可以用计算机的实际IP地址代替127.0.0.1
///
//multi_thread_server.c
///
//本文件是多线程并发服务器的代码
#include <netinet/in.h> // for sockaddr_in
#include <sys/types.h> // for socket
#include <sys/socket.h> // for socket
#include <stdio.h> // for printf
#include <stdlib.h> // for exit
#include <string.h> // for bzero
#include <pthread.h>
#include <sys/errno.h> // for errno
#define HELLO_WORLD_SERVER_PORT 6666
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define THREAD_MAX 5
void * talk_to_client(void *data)
{
int new_server_socket = (int)data;
char buffer[BUFFER_SIZE];
bzero(buffer, BUFFER_SIZE);
strcpy(buffer,"Hello,World! 从服务器来！");
strcat(buffer,"/n"); //C语言字符串连接
//发送buffer中的字符串到new_server_socket,实际是给客户端
send(new_server_socket,buffer,BUFFER_SIZE,0);
bzero(buffer,BUFFER_SIZE);
//接收客户端发送来的信息到buffer中
int length = recv(new_server_socket,buffer,BUFFER_SIZE,0);
if (length < 0)
{
printf("Server Recieve Data Failed!/n");
exit(1);
}
printf("/nSocket Num: %d /t %s",new_server_socket, buffer);
//关闭与客户端的连接
close(new_server_socket);
pthread_exit(NULL);
}
int main(int argc, char **argv)
{
//设置一个socket地址结构server_addr,代表服务器internet地址, 端口
struct sockaddr_in server_addr;
bzero(&server_addr,sizeof(server_addr)); //把一段内存区的内容全部设置为0
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htons(INADDR_ANY);
server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
//创建用于internet的流协议(TCP)socket,用server_socket代表服务器socket
int server_socket = socket(AF_INET,SOCK_STREAM,0);
if( server_socket < 0)
{
printf("Create Socket Failed!");
exit(1);
}
//把socket和socket地址结构联系起来
if( bind(server_socket,(struct sockaddr*)&server_addr,sizeof(server_addr)))
{
printf("Server Bind Port : %d Failed!", HELLO_WORLD_SERVER_PORT);
exit(1);
}
//server_socket用于监听
if ( listen(server_socket, LENGTH_OF_LISTEN_QUEUE) )
{
printf("Server Listen Failed!");
exit(1);
}
int i;
while(1) //服务器端要一直运行
{
//定义客户端的socket地址结构client_addr
struct sockaddr_in client_addr;
socklen_t length = sizeof(client_addr);
//接受一个到server_socket代表的socket的一个连接
//如果没有连接请求,就等待到有连接请求--这是accept函数的特性
//accept函数返回一个新的socket,这个socket(new_server_socket)用于同连接到的客户的通信
//new_server_socket代表了服务器和客户端之间的一个通信通道
//accept函数把连接到的客户端信息填写到客户端的socket地址结构client_addr中
int new_server_socket = accept(server_socket,(struct sockaddr*)&client_addr,&length);
if ( new_server_socket < 0)
{
printf("Server Accept Failed!/n");
break;
}
pthread_t child_thread;
pthread_attr_t child_thread_attr;
pthread_attr_init(&child_thread_attr);
pthread_attr_setdetachstate(&child_thread_attr,PTHREAD_CREATE_DETACHED);
if( pthread_create(&child_thread,&child_thread_attr,talk_to_client, (void *)new_server_socket) < 0 )
printf("pthread_create Failed : %s/n",strerror(errno));
}
//关闭监听用的socket
close(server_socket);
return 0;
}
///
// multi_thread_client.c
///
//本文件是客户机多线程多次重复与服务交互的代码
#include <netinet/in.h> // for sockaddr_in
#include <sys/types.h> // for socket
#include <sys/socket.h> // for socket
#include <stdio.h> // for printf
#include <stdlib.h> // for exit
#include <string.h> // for bzero
#include <pthread.h>
#include <sys/errno.h> // for errno
#define HELLO_WORLD_SERVER_PORT 6666
#define BUFFER_SIZE 1024
char * server_IP = NULL;
void * talk_to_server(void * thread_num)
{
//设置一个socket地址结构client_addr,代表客户机internet地址, 端口
struct sockaddr_in client_addr;
bzero(&client_addr,sizeof(client_addr)); //把一段内存区的内容全部设置为0
client_addr.sin_family = AF_INET; //internet协议族
client_addr.sin_addr.s_addr = htons(INADDR_ANY);//INADDR_ANY表示自动获取本机地址
client_addr.sin_port = htons(0); //0表示让系统自动分配一个空闲端口
//创建用于internet的流协议(TCP)socket,用client_socket代表客户机socket
int client_socket = socket(AF_INET,SOCK_STREAM,0);
if( client_socket < 0)
{
printf("Create Socket Failed!/n");
exit(1);
}
//把客户机的socket和客户机的socket地址结构联系起来
if( bind(client_socket,(struct sockaddr*)&client_addr,sizeof(client_addr)))
{
printf("Client Bind Port Failed!/n");
exit(1);
}
//设置一个socket地址结构server_addr,代表服务器的internet地址, 端口
struct sockaddr_in server_addr;
bzero(&server_addr,sizeof(server_addr));
server_addr.sin_family = AF_INET;
if(inet_aton(server_IP,&server_addr.sin_addr) == 0) //服务器的IP地址来自程序的参数
{
printf("Server IP Address Error!/n");
exit(1);
}
server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
socklen_t server_addr_length = sizeof(server_addr);
//向服务器发起连接,连接成功后client_socket代表了客户机和服务器的一个socket连接
if(connect(client_socket,(struct sockaddr*)&server_addr, server_addr_length) < 0)
{
printf("Can Not Connect To %s!/n",server_IP);
exit(1);
}
char buffer[BUFFER_SIZE];
bzero(buffer,BUFFER_SIZE);
//从服务器接收数据到buffer中
int length = recv(client_socket,buffer,BUFFER_SIZE,0);
if(length < 0)
{
printf("Recieve Data From Server %s Failed!/n", server_IP);
exit(1);
}
printf("From Server %s :/t%s",server_IP,buffer);
bzero(buffer,BUFFER_SIZE);
sprintf(buffer,"Hello, World! From Client Thread NUM :/t%d/n",(int)thread_num);
//向服务器发送buffer中的数据
send(client_socket,buffer,BUFFER_SIZE,0);
//关闭socket
close(client_socket);
pthread_exit(NULL);
}
int main(int argc, char **argv)
{
if (argc != 2)
{
printf("Usage: ./%s ServerIPAddress/n",argv[0]);
exit(1);
}
server_IP = argv[1];
pthread_t child_thread;
pthread_attr_t child_thread_attr;
pthread_attr_init(&child_thread_attr);
pthread_attr_setdetachstate(&child_thread_attr,PTHREAD_CREATE_DETACHED);
int i=0;
for(i=0; i<10000; i++)
{
if( pthread_create(&child_thread,&child_thread_attr,talk_to_server, (void *)i) < 0 )
printf("pthread_create Failed : %s/n",strerror(errno));
}
return 0;
}