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Class: TCPSocket

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
SOCKSSocket, TCPServer
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::IPSocket, ::BasicSocket, ::IO
Instance Chain:
self, ::IPSocket, ::BasicSocket, ::IO
Inherits: IPSocket
Defined in: ext/socket/tcpsocket.c

Overview

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

Class Attribute Summary

::BasicSocket - Inherited

.do_not_reverse_lookup

Gets the global do_not_reverse_lookup flag.
.do_not_reverse_lookup=

Sets the global do_not_reverse_lookup flag.

Class Method Summary

::IPSocket - Inherited

.getaddress

Lookups the IP address of host.

::BasicSocket - Inherited

.for_fd

Returns a socket object which contains the file descriptor, fd.

Instance Attribute Summary

::BasicSocket - Inherited

#do_not_reverse_lookup

Gets the do_not_reverse_lookup flag of basicsocket.
#do_not_reverse_lookup=

Sets the do_not_reverse_lookup flag of basicsocket.

Instance Method Summary

::IPSocket - Inherited

#addr

Returns the local address as an array which contains address_family, port, hostname and numeric_address.
#peeraddr

Returns the remote address as an array which contains address_family, port, hostname and numeric_address.
#recvfrom

Receives a message and return the message as a string and an address which the message come from.

::BasicSocket - Inherited

#close_read

Disallows further read using shutdown system call.
#close_write

Disallows further write using shutdown system call.
#connect_address

Returns an address of the socket suitable for connect in the local machine.
#getpeereid

Returns the user and group on the peer of the UNIX socket.
#getpeername

Returns the remote address of the socket as a sockaddr string.
#getsockname

Returns the local address of the socket as a sockaddr string.
#getsockopt

Gets a socket option.
#local_address

Returns an ::Addrinfo object for local address obtained by getsockname.
#recv

Receives a message.
#recv_nonblock

Receives up to maxlen bytes from socket using recvfrom(2) after O_NONBLOCK is set for the underlying file descriptor.
#recvmsg

recvmsg receives a message using recvmsg(2) system call in blocking manner.
#recvmsg_nonblock

recvmsg receives a message using recvmsg(2) system call in non-blocking manner.
#remote_address

Returns an ::Addrinfo object for remote address obtained by getpeername.
#send

send mesg via basicsocket.
#sendmsg

sendmsg sends a message using sendmsg(2) system call in blocking manner.
#sendmsg_nonblock

sendmsg_nonblock sends a message using sendmsg(2) system call in non-blocking manner.
#setsockopt

Sets a socket option.
#shutdown

Calls shutdown(2) system call.

Constructor Details

.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.

Class Method Details

.gethostbyname(hostname) ⇒ Array, ...

Lookups host information by hostname.

TCPSocket.gethostbyname("localhost")
#=> ["localhost", ["hal"], 2, "127.0.0.1"]