Ruby in a Nutshell

Name

Socket — General socket class

Synopsis

The Socket class is necessary to gain access to all the operating system’s socket interfaces. Interface structures can be created using String#pack.

Required Library

require ’socket’

Inherited Class

BasicSocket

Class Methods

Socket::for_fd(fd)

Creates a socket object corresponding to the file descriptor fd (an integer).

Socket::getaddrinfo(host, port[, family[, type[, proto[, flags]]]])

Returns an array containing socket address information (address family, port number, hostname, host IP address, protocol family, socket type, and protocol).

Socket::getaddrinfo("www.ruby-lang.org", "echo", Socket::AF_INET, Socket::SOCK_DGRAM)
# => [["AF_INET", 7, "www", "210.251.121.214", 2, 2, 17]]

Socket::gethostbyaddr(addr[, type=Socket::AF_INET)

Returns an array containing socket address information (address family, port number, hostname, host IP address, protocol family, socket type, and protocol).

Socket::getaddrinfo("www.ruby-lang.org", "echo", Socket::AF_INET, Socket::SOCK_DGRAM)
# => [["AF_INET", 7, "www", "210.251.121.214", 2, 2, 17]]

Socket::gethostbyname(name)

Returns an array containing host information retrieved from a host name.

Socket.gethostbyaddr(([127,0,0,1].pack("CCCC")))
# => ["ev", ["localhost", "ev.netlab.jp"], 2, "\177\000\000\001"]

Socket::gethostname

Returns the current hostname.

Socket::getnameinfo(addr[, flags])

Returns an array containing the name of the host and service retrieved from the specified socket address information. addr may be ...