TCP并发服务器模型（二）

本篇博客讲述单客户端单进程的TCP服务器并发模型。该模型由主进程统一处理客户端的连接，当接收到客户端连接后再临时fork()进程，由子进程处理客户请求。

模型如下图所示：



例程：

结合图示，程序易懂，代码就不解释了。

服务器端代码：

/*
author:arvik
purpose:test the server simultaneity
email:1216601195@qq.com
csdn: http://blog.csdn.net/u012819339 */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <arpa/inet.h>

#define BUFFLEN 1024
#define SERVER_PORT 8887
#define BACKLOG 3

static void handle_request(int s_c)
{
time_t now;
char buff[BUFFLEN];
int n = 0;

memset(buff, 0, sizeof(buff));
n = recv(s_c, buff, BUFFLEN, 0);

if(n>0)
{
printf("receive msg from client: %s\n", buff);
}

close(s_c);
}

static int handle_connect(int s_s)
{
int s_c;
struct sockaddr_in from;
socklen_t len = sizeof(from);
pid_t pid;

while(1)
{
s_c = accept(s_s, (struct sockaddr*)&from, &len); //block
if(s_c>0)
{
pid = fork();
if(pid>0) //parent
close(s_c);
else
{
handle_request(s_c);
return 0;
}
}
}
}

int main()
{
int s_s;
struct sockaddr_in local;

s_s = socket(AF_INET, SOCK_STREAM, 0);

memset(&local, 0, sizeof(local));
local.sin_family = AF_INET;
local.sin_addr.s_addr = inet_addr("127.0.0.1");//htonl(INADDR_ANY);
local.sin_port = htons(SERVER_PORT);

if(bind(s_s, (struct sockaddr*)&local, sizeof(local)))
{
printf("bind socket failed!\n");
return -1;
}

listen(s_s, BACKLOG);

handle_connect(s_s);

close(s_s);

return 0;
}

客户端代码：

和上篇博客中client.c代码一致，代码就不贴了，自己去找好了。地址http://blog.csdn.net/u012819339/article/details/50866116