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# frozen_string_literal: true
# Copyright, 2018, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require_relative 'address_endpoint'
module Async
module IO
class HostEndpoint < Endpoint
def initialize(specification, **options)
super(**options)
@specification = specification
end
def to_s
nodename, service, family, socktype, protocol, flags = @specification
"\#<#{self.class} name=#{nodename.inspect} service=#{service.inspect} family=#{family.inspect} type=#{socktype.inspect} protocol=#{protocol.inspect} flags=#{flags.inspect}>"
end
def address
@specification
end
def hostname
@specification.first
end
# Try to connect to the given host by connecting to each address in sequence until a connection is made.
# @yield [Socket] the socket which is being connected, may be invoked more than once
# @return [Socket] the connected socket
# @raise if no connection could complete successfully
def connect
last_error = nil
task = Task.current
Addrinfo.foreach(*@specification) do |address|
begin
wrapper = Socket.connect(address, **@options, task: task)
rescue Errno::ECONNREFUSED, Errno::ENETUNREACH, Errno::EAGAIN
last_error = $!
else
return wrapper unless block_given?
begin
return yield wrapper, task
ensure
wrapper.close
end
end
end
raise last_error
end
# Invokes the given block for every address which can be bound to.
# @yield [Socket] the bound socket
# @return [Array<Socket>] an array of bound sockets
def bind(&block)
Addrinfo.foreach(*@specification).map do |address|
Socket.bind(address, **@options, &block)
end
end
# @yield [AddressEndpoint] address endpoints by resolving the given host specification
def each
return to_enum unless block_given?
Addrinfo.foreach(*@specification) do |address|
yield AddressEndpoint.new(address, **@options)
end
end
end
class Endpoint
# @param args nodename, service, family, socktype, protocol, flags. `socktype` will be set to Socket::SOCK_STREAM.
# @param options keyword arguments passed on to {HostEndpoint#initialize}
#
# @return [HostEndpoint]
def self.tcp(*args, **options)
args[3] = ::Socket::SOCK_STREAM
HostEndpoint.new(args, **options)
end
# @param args nodename, service, family, socktype, protocol, flags. `socktype` will be set to Socket::SOCK_DGRAM.
# @param options keyword arguments passed on to {HostEndpoint#initialize}
#
# @return [HostEndpoint]
def self.udp(*args, **options)
args[3] = ::Socket::SOCK_DGRAM
HostEndpoint.new(args, **options)
end
end
end
end
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