#include<stdio.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<stdlib.h>
#include<arpa/inet.h>
#include<netinet/in.h>
#include<poll.h>
#include<unistd.h>
#define SIZE 1024
static void usage(const char *proc)
{
printf("Usage:%s [local_ip] [local_port]\n",proc);
}
int startup(const char*ip,int port)
{
int sock = socket(AF_INET,SOCK_STREAM,0);
if(sock < 0)
{
perror("sock");
exit(1);
}
struct sockaddr_in local;
local.sin_family = AF_INET;
local.sin_port = htons(port);
local.sin_addr.s_addr = inet_addr(ip);
if(bind(sock,(struct sockaddr*)&local,sizeof(local)) < 0)
{
perror("bind");
exit(2);
}
if(listen(sock,10) < 0)
{
perror("listen");
exit(3);
}
return sock;
}
int main(int argc,char *argv[])
{
if(argc != 3)
{
usage(argv[0]);
}
int listen_sock = startup(argv[1],atoi(argv[2]));
struct pollfd fds[SIZE];
int i = 0;
for(;i < SIZE;++i)
{
fds[i].fd = -1;
}
fds[0].fd = listen_sock;
fds[0].events = POLLIN;
fds[0].revents = 0;
int timeout = -1;
while(1)
{
switch(poll(fds,SIZE,timeout))
{
case -1:
perror("poll");
break;
case 0:
printf("timeout...\n");
break;
default:
{
for(int i = 0;i < SIZE;++i)
{
if(fds[i].fd == listen_sock && (fds[i].revents&POLLIN))
{
struct sockaddr_in client;
socklen_t len = sizeof(client);
int new_sock = accept(listen_sock,(struct sockaddr*)&client,&len);
if(new_sock < 0)
{
perror("accpet");
continue;
}
printf("get a client:[%s] [%d]\n",inet_ntoa(client.sin_addr),ntohs(client.sin_port));
int j = 0;
for(;j < SIZE;++j)
{
if(fds[j].fd == -1)
{
break;
}
}
if(j == SIZE)
{
close(new_sock);
}
else
{
fds[j].fd = new_sock;
fds[j].events = POLLIN;
}
}
else if(fds[i].fd > 0 && (fds[i].revents&POLLIN))
{
char buf[1024];
printf("hello\n");
ssize_t s = read(fds[i].fd,buf,sizeof(buf)-1);
if(s > 0)
{
buf[s] = 0;
printf("client#%s\n",buf);
}
else if(s == 0)
{
printf("client is quit!!!\n");
close(fds[i].fd);
fds[i].fd = -1;
}
else
{
perror("read");
close(fds[i].fd);
fds[i].fd = -1;
}
}
}
}
break;
}
}
return 0;
}
