一个简单的socket监听的服务器实例

#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<signal.h>
#include<unistd.h>
#include<stdlib.h>
#include<assert.h>
#include<stdio.h>
#include<string.h>
#include<stdbool.h>
static bool stop=false;

static void handle_term(int sig){
stop=true;
}

int main(int argc, char *argv[]){
signal(SIGTERM,handle_term);//绑定SIGTERM终止信号的事件处理函数为handle_term

if(argc<3){
printf("uage %s ip_address port_number backlog\n ",
basename(argv[0]));
return 1;
}
//获取参数
const char *ip=argv[1];
int port=atoi(argv[2]);
int backlog=atoi(argv[3]);

//创建socket,socket的协议族为PF_INET(ipv4),流服务，默认协议
int sock=socket(PF_INET, SOCK_STREAM,0);
assert(sock>=0);

//创建socket)address
struct sockaddr_in address;
bzero( &address, sizeof(address) ); //清0
address.sin_family = AF_INET;       //地址的协议族设为tcp/ipv4
inet_pton(AF_INET,ip,&address.sin_addr);//把点分十进制转化成ipv4结构的网络字节序地址
address.sin_port=htons(port);           //转化端口

int ret=bind(sock, (struct sockaddr * )&address , sizeof(address)); //绑定socket到socket_address
assert(ret!=-1);

ret=listen(sock,backlog);//监听端口
assert(ret!=-1);

while(!stop){
sleep(1);
}

close(sock);
return 0;
}