ЭЛЕКТРОННАЯ БИБЛИОТЕКА КОАПП |
Сборники Художественной, Технической, Справочной, Английской, Нормативной, Исторической, и др. литературы. |
17.14. Writing a Multi-Homed ServerProblemYou want to write a server that knows that the machine it runs on has multiple IP addresses, and that it should possibly do different things for each address. SolutionDon't bind your server to a particular address. Instead, bind to use Socket; socket(SERVER, PF_INET, SOCK_STREAM, getprotobyname('tcp')); setsockopt(SERVER, SOL_SOCKET, SO_REUSEADDR, 1); bind(SERVER, sockaddr_in($server_port, INADDR_ANY)) or die "Binding: $!\n"; # accept loop while (accept(CLIENT, SERVER)) { $my_socket_address = getsockname(CLIENT); ($port, $myaddr) = sockaddr_in($my_socket_address); } DiscussionWhereas If you're using IO::Socket::INET, your code will look like this: $server = IO::Socket::INET->new(LocalPort => $server_port, Type => SOCK_STREAM, Proto => 'tcp', Listen => 10) or die "Can't create server socket: $@\n"; while ($client = $server->accept()) { $my_socket_address = $client->sockname(); ($port, $myaddr) = sockaddr_in($my_socket_address); # ... } If you don't specify a local port to If you want your server to listen only for a particular virtual host, don't use use Socket; $port = 4269; # port to bind to $host = "specific.host.com"; # virtual host to listen on socket(Server, PF_INET, SOCK_STREAM, getprotobyname("tcp")) or die "socket: $!"; bind(Server, sockaddr_in($port, inet_aton($host))) or die "bind: $!"; while ($client_address = accept(Client, Server)) { # ... } See AlsoThe
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