/************************************************ tcpsocket.c - created at: Thu Mar 31 12:21:29 JST 1994 Copyright (C) 1993-2007 Yukihiro Matsumoto ************************************************/ #include "rubysocket.h" /* * call-seq: * TCPSocket.new(remote_host, remote_port, local_host=nil, local_port=nil) * * Opens a TCP connection to +remote_host+ on +remote_port+. If +local_host+ * and +local_port+ are specified, then those parameters are used on the local * end to establish the connection. */ static VALUE tcp_init(int argc, VALUE *argv, VALUE sock) { VALUE remote_host, remote_serv; VALUE local_host, local_serv; rb_scan_args(argc, argv, "22", &remote_host, &remote_serv, &local_host, &local_serv); return rsock_init_inetsock(sock, remote_host, remote_serv, local_host, local_serv, INET_CLIENT); } static VALUE tcp_sockaddr(struct sockaddr *addr, socklen_t len) { return rsock_make_ipaddr(addr, len); } /* * call-seq: * TCPSocket.gethostbyname(hostname) => [official_hostname, alias_hostnames, address_family, *address_list] * * Use Addrinfo.getaddrinfo instead. * This method is deprecated for the following reasons: * * - The 3rd element of the result is the address family of the first address. * The address families of the rest of the addresses are not returned. * - gethostbyname() may take a long time and it may block other threads. * (GVL cannot be released since gethostbyname() is not thread safe.) * - This method uses gethostbyname() function already removed from POSIX. * * This method lookups host information by _hostname_. * * TCPSocket.gethostbyname("localhost") * #=> ["localhost", ["hal"], 2, "127.0.0.1"] * */ static VALUE tcp_s_gethostbyname(VALUE obj, VALUE host) { struct rb_addrinfo *res = rsock_addrinfo(host, Qnil, AF_UNSPEC, SOCK_STREAM, AI_CANONNAME); return rsock_make_hostent(host, res, tcp_sockaddr); } void rsock_init_tcpsocket(void) { /* * Document-class: TCPSocket < IPSocket * * TCPSocket represents a TCP/IP client socket. * * A simple client may look like: * * require 'socket' * * s = TCPSocket.new 'localhost', 2000 * * while line = s.gets # Read lines from socket * puts line # and print them * end * * s.close # close socket when done * */ rb_cTCPSocket = rb_define_class("TCPSocket", rb_cIPSocket); rb_define_singleton_method(rb_cTCPSocket, "gethostbyname", tcp_s_gethostbyname, 1); rb_define_method(rb_cTCPSocket, "initialize", tcp_init, -1); }