Class: Async::IO::Socket

Inherits:
BasicSocket show all
Includes:
Server
Defined in:
lib/async/io/socket.rb

Constant Summary

Constants inherited from Generic

Generic::WRAPPERS

Instance Attribute Summary

Attributes inherited from Generic

#timeout

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Server

#accept_each

Methods included from Peer

#connected?, #eof, #eof?, #protocol, #sync, #sync=, #type

Methods inherited from Generic

#<<, #connected?, #dup, #nonblock, #nonblock=, #nonblock?, #read, #sysread, #syswrite, #wait, wrap, wrap_blocking_method, wraps, #write

Class Method Details

.accept(*args, backlog: SOMAXCONN, &block) ⇒ Object

Bind to a local address and accept connections in a loop.


177
178
179
180
181
182
183
# File 'lib/async/io/socket.rb', line 177

def self.accept(*args, backlog: SOMAXCONN, &block)
	bind(*args) do |server, task|
		server.listen(backlog) if backlog
		
		server.accept_each(task: task, &block)
	end
end

.bind(local_address, protocol: 0, task: Task.current, **options, &block) ⇒ Object

Bind to a local address.

Examples:

socket = Async::IO::Socket.bind(Async::IO::Address.tcp("0.0.0.0", 9090))

Parameters:

  • local_address (Address)

    The local address to bind to.

  • protocol (Hash) (defaults to: 0)

    a customizable set of options

Options Hash (protocol:):

  • The (Integer)

    socket protocol to use.


156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
# File 'lib/async/io/socket.rb', line 156

def self.bind(local_address, protocol: 0, task: Task.current, **options, &block)
	Console.logger.debug(self) {"Binding to #{local_address.inspect}"}
	
	wrapper = build(local_address.afamily, local_address.socktype, protocol, **options) do |socket|
		socket.bind(local_address.to_sockaddr)
	end
	
	return wrapper unless block_given?
	
	task.async do |task|
		task.annotate "binding to #{wrapper.local_address.inspect}"
		
		begin
			yield wrapper, task
		ensure
			wrapper.close
		end
	end
end

.build(*args, timeout: nil, reuse_address: true, reuse_port: nil, linger: nil, task: Task.current) ⇒ Object

Build and wrap the underlying io.

Parameters:

  • reuse_port (Hash) (defaults to: nil)

    a customizable set of options

  • reuse_address (Hash) (defaults to: true)

    a customizable set of options

Options Hash (reuse_address:):

  • Allow (Boolean)

    this port to be bound in multiple processes.

Options Hash (reuse_port:):

  • Allow (Boolean)

    this port to be bound in multiple processes.


86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
# File 'lib/async/io/socket.rb', line 86

def self.build(*args, timeout: nil, reuse_address: true, reuse_port: nil, linger: nil, task: Task.current)
	socket = wrapped_klass.new(*args)
	
	if reuse_address
		socket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
	end
	
	if reuse_port
		socket.setsockopt(SOL_SOCKET, SO_REUSEPORT, 1)
	end
	
	if linger
		socket.setsockopt(SOL_SOCKET, SO_LINGER, linger)
	end
	
	yield socket
	
	wrapper = self.new(socket, task.reactor)
	wrapper.timeout = timeout
	
	return wrapper
rescue Exception
	socket.close if socket
	
	raise
end

.connect(remote_address, local_address: nil, task: Task.current, **options) ⇒ Object

Establish a connection to a given `remote_address`.

Examples:

socket = Async::IO::Socket.connect(Async::IO::Address.tcp("8.8.8.8", 53))

Parameters:

  • remote_address (Address)

    The remote address to connect to.

  • local_address (Hash) (defaults to: nil)

    a customizable set of options

Options Hash (local_address:):

  • The (Address)

    local address to bind to before connecting.


118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
# File 'lib/async/io/socket.rb', line 118

def self.connect(remote_address, local_address: nil, task: Task.current, **options)
	Console.logger.debug(self) {"Connecting to #{remote_address.inspect}"}
	
	task.annotate "connecting to #{remote_address.inspect}"
	
	wrapper = build(remote_address.afamily, remote_address.socktype, remote_address.protocol, **options) do |socket|
		if local_address
			if defined?(IP_BIND_ADDRESS_NO_PORT)
				# Inform the kernel (Linux 4.2+) to not reserve an ephemeral port when using bind(2) with a port number of 0. The port will later be automatically chosen at connect(2) time, in a way that allows sharing a source port as long as the 4-tuple is unique.
				socket.setsockopt(SOL_IP, IP_BIND_ADDRESS_NO_PORT, 1)
			end
			
			socket.bind(local_address.to_sockaddr)
		end
	end
	
	begin
		wrapper.connect(remote_address.to_sockaddr)
		task.annotate "connected to #{remote_address.inspect} [fd=#{wrapper.fileno}]"
	rescue Exception
		wrapper.close
		raise
	end
	
	return wrapper unless block_given?
	
	begin
		yield wrapper, task
	ensure
		wrapper.close
	end
end

.pair(*args) ⇒ Object


187
188
189
# File 'lib/async/io/socket.rb', line 187

def self.pair(*args)
	::Socket.pair(*args).map(&self.method(:new))
end

Instance Method Details

#accept(timeout: nil, task: Task.current) ⇒ Object

Parameters:

  • duration (Numeric)

    the maximum time to wait for accepting a connection, if specified.


61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
# File 'lib/async/io/socket.rb', line 61

def accept(timeout: nil, task: Task.current)
	peer, address = async_send(:accept_nonblock, timeout: timeout)
	wrapper = Socket.new(peer, task.reactor)
	
	wrapper.timeout = self.timeout
	
	return wrapper, address unless block_given?
	
	task.async do |task|
		task.annotate "incoming connection #{address.inspect} [fd=#{wrapper.fileno}]"
		
		begin
			yield wrapper, address
		ensure
			wrapper.close
		end
	end
end

#accept_nonblockObject

Parameters:

  • duration (Numeric)

    the maximum time to wait for accepting a connection, if specified.


80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
# File 'lib/async/io/socket.rb', line 80

def accept(timeout: nil, task: Task.current)
	peer, address = async_send(:accept_nonblock, timeout: timeout)
	wrapper = Socket.new(peer, task.reactor)
	
	wrapper.timeout = self.timeout
	
	return wrapper, address unless block_given?
	
	task.async do |task|
		task.annotate "incoming connection #{address.inspect} [fd=#{wrapper.fileno}]"
		
		begin
			yield wrapper, address
		ensure
			wrapper.close
		end
	end
end

#connect(*args) ⇒ Object

Raises:

  • Errno::EAGAIN the connection failed due to the remote end being overloaded.


50
51
52
53
54
55
56
# File 'lib/async/io/socket.rb', line 50

def connect(*args)
	begin
		async_send(:connect_nonblock, *args)
	rescue Errno::EISCONN
		# We are now connected.
	end
end

#connect_nonblockObject

Raises:

  • Errno::EAGAIN the connection failed due to the remote end being overloaded.


58
59
60
61
62
63
64
# File 'lib/async/io/socket.rb', line 58

def connect(*args)
	begin
		async_send(:connect_nonblock, *args)
	rescue Errno::EISCONN
		# We are now connected.
	end
end

#sysacceptObject

Parameters:

  • duration (Numeric)

    the maximum time to wait for accepting a connection, if specified.


81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
# File 'lib/async/io/socket.rb', line 81

def accept(timeout: nil, task: Task.current)
	peer, address = async_send(:accept_nonblock, timeout: timeout)
	wrapper = Socket.new(peer, task.reactor)
	
	wrapper.timeout = self.timeout
	
	return wrapper, address unless block_given?
	
	task.async do |task|
		task.annotate "incoming connection #{address.inspect} [fd=#{wrapper.fileno}]"
		
		begin
			yield wrapper, address
		ensure
			wrapper.close
		end
	end
end