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d808918583
TCPSocket.gethostbyname has problems similar to
Socket.gethostbyname.
An example of the problem which only the address family of
the first address is returned:
```
pp TCPSocket.gethostbyname("www.wide.ad.jp")
#=> ["www.wide.ad.jp",
[],
10,
"2001:200:dff:fff1:216:3eff:fe4b:651c",
"203.178.137.58"]
```
The address family of the first address, AF_INET6 (10), is
returned but
the address family of the second address, AF_INET, is not
returned.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60319 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/************************************************
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tcpsocket.c -
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created at: Thu Mar 31 12:21:29 JST 1994
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Copyright (C) 1993-2007 Yukihiro Matsumoto
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************************************************/
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#include "rubysocket.h"
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/*
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* call-seq:
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* TCPSocket.new(remote_host, remote_port, local_host=nil, local_port=nil)
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*
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* Opens a TCP connection to +remote_host+ on +remote_port+. If +local_host+
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* and +local_port+ are specified, then those parameters are used on the local
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* end to establish the connection.
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*/
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static VALUE
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tcp_init(int argc, VALUE *argv, VALUE sock)
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{
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VALUE remote_host, remote_serv;
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VALUE local_host, local_serv;
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rb_scan_args(argc, argv, "22", &remote_host, &remote_serv,
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&local_host, &local_serv);
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return rsock_init_inetsock(sock, remote_host, remote_serv,
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local_host, local_serv, INET_CLIENT);
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}
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static VALUE
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tcp_sockaddr(struct sockaddr *addr, socklen_t len)
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{
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return rsock_make_ipaddr(addr, len);
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}
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/*
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* call-seq:
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* TCPSocket.gethostbyname(hostname) => [official_hostname, alias_hostnames, address_family, *address_list]
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*
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* Use Addrinfo.getaddrinfo instead.
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* This method is deprecated since following reasons:
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*
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* - The 3rd element of result is the address family of the first address.
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* The address families of rest addresses are not returned.
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* - gethostbyname() is may take long time and it may block other threads.
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* (GVL cannot be released since gethostbyname() is not thread safe.)
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* - This method uses gethostbyname() function already removed from POSIX.
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*
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* This method lookups host information by _hostname_.
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*
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* TCPSocket.gethostbyname("localhost")
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* #=> ["localhost", ["hal"], 2, "127.0.0.1"]
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*
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*/
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static VALUE
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tcp_s_gethostbyname(VALUE obj, VALUE host)
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{
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struct rb_addrinfo *res =
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rsock_addrinfo(host, Qnil, AF_UNSPEC, SOCK_STREAM, AI_CANONNAME);
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return rsock_make_hostent(host, res, tcp_sockaddr);
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}
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void
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rsock_init_tcpsocket(void)
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{
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/*
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* Document-class: TCPSocket < IPSocket
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*
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* TCPSocket represents a TCP/IP client socket.
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*
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* A simple client may look like:
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*
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* require 'socket'
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*
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* s = TCPSocket.new 'localhost', 2000
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*
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* while line = s.gets # Read lines from socket
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* puts line # and print them
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* end
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*
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* s.close # close socket when done
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*
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*/
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rb_cTCPSocket = rb_define_class("TCPSocket", rb_cIPSocket);
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rb_define_singleton_method(rb_cTCPSocket, "gethostbyname", tcp_s_gethostbyname, 1);
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rb_define_method(rb_cTCPSocket, "initialize", tcp_init, -1);
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}
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