我想比较客户端发送到服务器的一些数据。但是我的服务器在我的结果函数中的随机函数之后卡住了。它没有 printf (printf("Into IF");) 或进入 ifs,这是为什么呢?
等待传入连接...按 Ctrl+C 结束服务器
来自 127.0.0.1 的连接,端口 60697 收到消息:c Ramdom es 12
我的代码:
void
result(int sockfd)
{
ssize_t n;
char buf[MAXLINE];
int temp;
time_t ticks;
int i;
again:
while ((n =read(sockfd, buf, MAXLINE)> 0))
{
buf[n] = '\0';
printf("Message Recieved:%s\n",buf);
srand (time(NULL));
temp = rand() % 15+1;
printf("Ramdom es %i\n",temp);
printf("Into IF");
if ((strncmp (buf,"A",1) == 0) || (strncmp (buf,"a",1) == 0))
{
snprintf(buf, sizeof(buf), "You choose -%i tymes optin A on %.24s\r\n", temp,ctime(&ticks));
Writen(sockfd, buf, n);
}
else if ((strncmp (buf,"B",1) == 0) || (strncmp (buf,"b",1) == 0))
{
snprintf(buf, sizeof(buf), "You choose -%i tymes optin B on on %.24s\r\n", temp,ctime(&ticks));
Writen(sockfd, buf, n);
}
else
{
printf("Incorrect Input");
Close(sockfd);
break;
}
}
if (n < 0 && errno == EINTR)
goto again;
else if (n < 0)
err_sys("read error");
}
int
main(int argc, char **argv)
{
int listenfd, connfd;
socklen_t len;
struct sockaddr_in servaddr, cliaddr;
char buff[MAXLINE];
/*char message[MAXLINE];*/
char recvline[MAXLINE + 1];
listenfd = Socket(AF_INET, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);/*----------------------------------------------------*/
servaddr.sin_port = htons(5678);
Bind(listenfd, (SA *) &servaddr, sizeof(servaddr));
Listen(listenfd, LISTENQ);
printf("Server is running on 127.0.0.1, listening on port 5678\n");
printf("\n");
printf("Waiting for incoming connections...Press Ctrl+C to end server\n");
for ( ; ; )
{
len = sizeof(cliaddr);
connfd = Accept(listenfd, (SA *) &cliaddr, &len);
/*Client connects to server*/
printf("\n");
printf("Connection from %s, port %d\n",
Inet_ntop(AF_INET, &cliaddr.sin_addr, buff, sizeof(buff)),
ntohs(cliaddr.sin_port));
result(connfd);
Close(connfd);
}
}
谢谢!