#include "unp.h"
#include <time.h>服務器
int
main(int argc, char **argv)
{
int listenfd, connfd;
socklen_t len;
struct sockaddr_in servaddr, cliaddr;
char buff[MAXLINE];
time_t ticks;
listenfd = Socket(AF_INET, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
inet_pton(AF_INET,"222.27.254.151",&servaddr.sin_addr.s_addr);
servaddr.sin_port = htons(13); /* daytime server */
Bind(listenfd, (SA *) &servaddr, sizeof(servaddr));
Listen(listenfd, LISTENQ);
for ( ; ; ) {
len = sizeof(cliaddr);
connfd = Accept(listenfd, (SA *) &cliaddr, &len);
printf("connection from %s, port %d\n",
Inet_ntop(AF_INET, &cliaddr.sin_addr, buff, sizeof(buff)),
ntohs(cliaddr.sin_port));函數
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
Write(connfd, buff, strlen(buff));spa
Close(connfd);
}
}server
以上代碼是簡單的服務器程序,實現的是輸出時間和訪問者的ip地址,源代碼沒有與網卡的ip地址綁定,使用inet_pton函數能夠實現ip地址的綁定,權做練習。進程
關於出現 Bind error: Address already in use 的問題ip
能夠採用 lsof -i:13(端口號)查找進程,進而kill掉便可。it