我开发了(TCP)服务器来侦听客户端并与之交互。现在我试图调整这个服务器代码来收听多个客户端。我想要使用select,但是我对我发现的一些示例和解释感到困惑。使用select()来侦听多个客户端(TCP)
我一直在读:http://support.sas.com/documentation/onlinedoc/sasc/doc750/html/lr2/select.htm和http://support.sas.com/documentation/onlinedoc/sasc/doc750/html/lr2/select.htm这两个国家都被推荐到我..:S
第一个站点的例子似乎不太复杂。(尽管仍然不知道如何将它适应我因为我对网络非常非常陌生等),但我担心由于第二个站点示例的复杂性,我错过了关键方面。
下面是那种我的服务器代码的快照时只监听一个客户端(包括一些伪代码,以尽量减少不那么重要的东西):
int main(int argc, char *argv[])
{
int sockfd, newsockfd, portno, clilen;
char buffer[3];
struct sockaddr_in serv_addr, cli_addr;
int n;
if (argc < 2)
{
fprintf(stderr,"ERROR, no port provided\n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0){error("ERROR opening socket");}
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
{error("ERROR on binding");}
listen(sockfd,5);
clilen = sizeof(cli_addr);
newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
if (newsockfd < 0){error("ERROR on accept");}
while (UNTIL END OF FILE)
{
<DO SOME FILE READING STUFF>
n = write(newsockfd, "test/n", 5);
if (n < 0){error("ERROR writing to socket");}
bzero(buffer,3);
n = read(newsockfd,buffer,3);
if (n < 0){error("ERROR reading from socket");}
buffer[n] = 0;
<DO SOME STRING STUFF>
while(done != 1)
{
bzero(buffer,3);
n = read(newsockfd,buffer,3);
if (n < 0){error("ERROR reading from socket");}
buffer[n] = 0;
if(strcmp(buffer, "CO"))
{
done = 1;
}
}
done = 0;
}
<DO STUFF>
n = write(newsockfd, "DN\n", 2);
if (n < 0){error("ERROR writing to socket");}
close(sockfd);
close(newsockfd);
return 0;
}
哪个网站对选)为例(将工作最好为我我想要做的(更改服务器代码来听多个客户端)?有人可以用一些更简单的术语解释select()吗? (因为我对这个和所有这么新......)
谢谢!