Class: Addrinfo
Relationships & Source Files | |
Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
::Data
|
|
Instance Chain:
self,
::Data
|
|
Inherits: | Data |
Defined in: | ext/socket/raddrinfo.c, ext/socket/lib/socket.rb |
Overview
The Addrinfo class maps struct addrinfo
to ruby. This structure identifies an Internet host and a service.
Class Method Summary
-
.foreach(nodename, service, family = nil, socktype = nil, protocol = nil, flags = nil, &block)
iterates over the list of
Addrinfo
objects obtained by .getaddrinfo. -
.getaddrinfo(nodename, service, family, socktype, protocol, flags) ⇒ Addrinfo, ...
returns a list of addrinfo objects as an array.
-
.ip(host) ⇒ Addrinfo
returns an addrinfo object for IP address.
-
.new(sockaddr) ⇒ Addrinfo
constructor
returns a new instance of
Addrinfo
. -
.tcp(host, port) ⇒ Addrinfo
returns an addrinfo object for TCP address.
-
.udp(host, port) ⇒ Addrinfo
returns an addrinfo object for UDP address.
-
.unix(path [, socktype]) ⇒ Addrinfo
returns an addrinfo object for UNIX socket address.
Instance Attribute Summary
-
#ip? ⇒ Boolean
readonly
returns true if addrinfo is internet (IPv4/IPv6) address.
-
#ipv4? ⇒ Boolean
readonly
returns true if addrinfo is IPv4 address.
-
#ipv4_loopback? ⇒ Boolean
readonly
Returns true for IPv4 loopback address (127.0.0.0/8).
-
#ipv4_multicast? ⇒ Boolean
readonly
Returns true for IPv4 multicast address (224.0.0.0/4).
-
#ipv4_private? ⇒ Boolean
readonly
Returns true for IPv4 private address (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16).
-
#ipv6? ⇒ Boolean
readonly
returns true if addrinfo is IPv6 address.
-
#ipv6_linklocal? ⇒ Boolean
readonly
Returns true for IPv6 link local address (ff80::/10).
-
#ipv6_loopback? ⇒ Boolean
readonly
Returns true for IPv6 loopback address (::1).
-
#ipv6_mc_global? ⇒ Boolean
readonly
Returns true for IPv6 multicast global scope address.
-
#ipv6_mc_linklocal? ⇒ Boolean
readonly
Returns true for IPv6 multicast link-local scope address.
-
#ipv6_mc_nodelocal? ⇒ Boolean
readonly
Returns true for IPv6 multicast node-local scope address.
-
#ipv6_mc_orglocal? ⇒ Boolean
readonly
Returns true for IPv6 multicast organization-local scope address.
-
#ipv6_mc_sitelocal? ⇒ Boolean
readonly
Returns true for IPv6 multicast site-local scope address.
-
#ipv6_multicast? ⇒ Boolean
readonly
Returns true for IPv6 multicast address (ff00::/8).
-
#ipv6_sitelocal? ⇒ Boolean
readonly
Returns true for IPv6 site local address (ffc0::/10).
-
#ipv6_unique_local? ⇒ Boolean
readonly
Returns true for IPv6 unique local address (fc00::/7, RFC4193).
-
#ipv6_unspecified? ⇒ Boolean
readonly
Returns true for IPv6 unspecified address (::).
-
#ipv6_v4compat? ⇒ Boolean
readonly
Returns true for IPv4-compatible IPv6 address (::/80).
-
#ipv6_v4mapped? ⇒ Boolean
readonly
Returns true for IPv4-mapped IPv6 address (::ffff:0:0/80).
-
#unix? ⇒ Boolean
readonly
returns true if addrinfo is UNIX address.
Instance Method Summary
-
#afamily ⇒ Integer
returns the address family as an integer.
-
#bind
creates a socket bound to self.
-
#canonname ⇒ String?
returns the canonical name as an string.
-
#connect([opts]) {|socket| ... }
creates a socket connected to the address of self.
-
#connect_from([local_addr_args], [opts]) {|socket| ... }
creates a socket connected to the address of self.
-
#connect_to([remote_addr_args], [opts]) {|socket| ... }
creates a socket connected to remote_addr_args and bound to self.
-
#family_addrinfo(*args)
creates an
Addrinfo
object from the arguments. -
#getnameinfo ⇒ Array, service
returns nodename and service as a pair of strings.
-
#inspect ⇒ String
returns a string which shows addrinfo in human-readable form.
-
#inspect_sockaddr ⇒ String
returns a string which shows the sockaddr in addrinfo with human-readable form.
-
#ip_address ⇒ String
Returns the IP address as a string.
-
#ip_port ⇒ port
Returns the port number as an integer.
-
#ip_unpack ⇒ Array, port
Returns the IP address and port number as 2-element array.
-
#ipv6_to_ipv4
Returns IPv4 address of IPv4 mapped/compatible IPv6 address.
-
#listen(backlog = Socket::SOMAXCONN)
creates a listening socket bound to self.
-
#pfamily ⇒ Integer
returns the protocol family as an integer.
-
#protocol ⇒ Integer
returns the socket type as an integer.
-
#socktype ⇒ Integer
returns the socket type as an integer.
-
#to_sockaddr ⇒ String
(also: #to_sockaddr)
returns the socket address as packed struct sockaddr string.
-
#to_sockaddr ⇒ String
Alias for #to_s.
-
#unix_path ⇒ path
Returns the socket path as a string.
-
#connect_internal(local_addrinfo, timeout = nil)
private
creates a new ::Socket connected to the address of
local_addrinfo
.
Constructor Details
.new(sockaddr) ⇒ Addrinfo
.new(sockaddr, family) ⇒ Addrinfo
.new(sockaddr, family, socktype) ⇒ Addrinfo
.new(sockaddr, family, socktype, protocol) ⇒ Addrinfo
Addrinfo
.new(sockaddr, family) ⇒ Addrinfo
.new(sockaddr, family, socktype) ⇒ Addrinfo
.new(sockaddr, family, socktype, protocol) ⇒ Addrinfo
returns a new instance of Addrinfo
. The instance contains sockaddr, family, socktype, protocol. sockaddr means struct sockaddr which can be used for connect(2), etc. family, socktype and protocol are integers which is used for arguments of socket(2).
sockaddr is specified as an array or a string. The array should be compatible to the value of IPSocket#addr or UNIXSocket#addr. The string should be struct sockaddr as generated by Socket.sockaddr_in or Socket.unpack_sockaddr_un.
sockaddr examples:
- “AF_INET”, 46102, “localhost.localdomain”, “127.0.0.1”
- “AF_INET6”, 42304, “ip6-localhost”, “::1”
- “AF_UNIX”, “/tmp/sock”
-
::Socket.sockaddr_in(“smtp”, “2001:DB8::1”)
-
::Socket.sockaddr_in(80, “172.18.22.42”)
-
::Socket.sockaddr_in(80, “www.ruby-lang.org”)
-
::Socket.sockaddr_un(“/tmp/sock”)
In an AF_INET/AF_INET6 sockaddr array, the 4th element, numeric IP address, is used to construct socket address in the Addrinfo
instance. If the 3rd element, textual host name, is non-nil, it is also recorded but used only for #inspect.
family is specified as an integer to specify the protocol family such as Socket::PF_INET. It can be a symbol or a string which is the constant name with or without PF_ prefix such as :INET
, :INET6
, :UNIX
, “PF_INET”, etc. If omitted, PF_UNSPEC is assumed.
socktype is specified as an integer to specify the socket type such as Socket::SOCK_STREAM. It can be a symbol or a string which is the constant name with or without SOCK_ prefix such as :STREAM
, :DGRAM
, :RAW
, “SOCK_STREAM”, etc. If omitted, 0 is assumed.
protocol is specified as an integer to specify the protocol such as Socket::IPPROTO_TCP. It must be an integer, unlike family and socktype. If omitted, 0 is assumed. Note that 0 is reasonable value for most protocols, except raw socket.
Class Method Details
.foreach(nodename, service, family = nil, socktype = nil, protocol = nil, flags = nil, &block)
iterates over the list of Addrinfo
objects obtained by .getaddrinfo.
Addrinfo.foreach(nil, 80) {|x| p x }
#=> #<Addrinfo: 127.0.0.1:80 TCP (:80)>
# #<Addrinfo: 127.0.0.1:80 UDP (:80)>
# #<Addrinfo: [::1]:80 TCP (:80)>
# #<Addrinfo: [::1]:80 UDP (:80)>
# File 'ext/socket/lib/socket.rb', line 231
def self.foreach(nodename, service, family=nil, socktype=nil, protocol=nil, flags=nil, &block) Addrinfo.getaddrinfo(nodename, service, family, socktype, protocol, flags).each(&block) end
.getaddrinfo(nodename, service, family, socktype, protocol, flags) ⇒ Addrinfo
, ...
.getaddrinfo(nodename, service, family, socktype, protocol) ⇒ Addrinfo
, ...
.getaddrinfo(nodename, service, family, socktype) ⇒ Addrinfo
, ...
.getaddrinfo(nodename, service, family) ⇒ Addrinfo
, ...
.getaddrinfo(nodename, service) ⇒ Addrinfo
, ...
Addrinfo
, ...
.getaddrinfo(nodename, service, family, socktype, protocol) ⇒ Addrinfo
, ...
.getaddrinfo(nodename, service, family, socktype) ⇒ Addrinfo
, ...
.getaddrinfo(nodename, service, family) ⇒ Addrinfo
, ...
.getaddrinfo(nodename, service) ⇒ Addrinfo
, ...
returns a list of addrinfo objects as an array.
This method converts nodename (hostname) and service (port) to addrinfo. Since the conversion is not unique, the result is a list of addrinfo objects.
nodename or service can be nil if no conversion intended.
family, socktype and protocol are hint for preferred protocol. If the result will be used for a socket with SOCK_STREAM, SOCK_STREAM should be specified as socktype. If so, getaddrinfo
returns addrinfo list appropriate for SOCK_STREAM. If they are omitted or nil is given, the result is not restricted.
Similarly, PF_INET6 as family restricts for IPv6.
flags should be bitwise OR of Socket::AI_??? constants such as follows. Note that the exact list of the constants depends on OS.
AI_PASSIVE Get address to use with bind()
AI_CANONNAME Fill in the canonical name
AI_NUMERICHOST Prevent host name resolution
AI_NUMERICSERV Prevent service name resolution
AI_V4MAPPED Accept IPv4-mapped IPv6 addresses
AI_ALL Allow all addresses
AI_ADDRCONFIG Accept only if any address is assigned
Note that socktype should be specified whenever application knows the usage of the address. Some platform causes an error when socktype is omitted and servname is specified as an integer because some port numbers, 512 for example, are ambiguous without socktype.
Addrinfo.getaddrinfo("www.kame.net", 80, nil, :STREAM)
#=> [#<Addrinfo: 203.178.141.194:80 TCP (www.kame.net)>,
# #<Addrinfo: [2001:200:dff:fff1:216:3eff:feb1:44d7]:80 TCP (www.kame.net)>]
.ip(host) ⇒ Addrinfo
returns an addrinfo object for IP address.
The port, socktype, protocol of the result is filled by zero. So, it is not appropriate to create a socket.
Addrinfo.ip("localhost") #=> #<Addrinfo: 127.0.0.1 (localhost)>
.tcp(host, port) ⇒ Addrinfo
returns an addrinfo object for TCP address.
Addrinfo.tcp("localhost", "smtp") #=> #<Addrinfo: 127.0.0.1:25 TCP (localhost:smtp)>
.udp(host, port) ⇒ Addrinfo
returns an addrinfo object for UDP address.
Addrinfo.udp("localhost", "daytime") #=> #<Addrinfo: 127.0.0.1:13 UDP (localhost:daytime)>
.unix(path [, socktype]) ⇒ Addrinfo
returns an addrinfo object for UNIX socket address.
socktype specifies the socket type. If it is omitted, :STREAM
is used.
Addrinfo.unix("/tmp/sock") #=> #<Addrinfo: /tmp/sock SOCK_STREAM>
Addrinfo.unix("/tmp/sock", :DGRAM) #=> #<Addrinfo: /tmp/sock SOCK_DGRAM>
Instance Attribute Details
#ip? ⇒ Boolean
(readonly)
#ipv4? ⇒ Boolean
(readonly)
#ipv4_loopback? ⇒ Boolean
(readonly)
Returns true for IPv4 loopback address (127.0.0.0/8). It returns false otherwise.
#ipv4_multicast? ⇒ Boolean
(readonly)
Returns true for IPv4 multicast address (224.0.0.0/4). It returns false otherwise.
#ipv4_private? ⇒ Boolean
(readonly)
Returns true for IPv4 private address (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16). It returns false otherwise.
#ipv6? ⇒ Boolean
(readonly)
#ipv6_linklocal? ⇒ Boolean
(readonly)
Returns true for IPv6 link local address (ff80::/10). It returns false otherwise.
#ipv6_loopback? ⇒ Boolean
(readonly)
Returns true for IPv6 loopback address (::1). It returns false otherwise.
#ipv6_mc_global? ⇒ Boolean
(readonly)
Returns true for IPv6 multicast global scope address. It returns false otherwise.
#ipv6_mc_linklocal? ⇒ Boolean
(readonly)
Returns true for IPv6 multicast link-local scope address. It returns false otherwise.
#ipv6_mc_nodelocal? ⇒ Boolean
(readonly)
Returns true for IPv6 multicast node-local scope address. It returns false otherwise.
#ipv6_mc_orglocal? ⇒ Boolean
(readonly)
Returns true for IPv6 multicast organization-local scope address. It returns false otherwise.
#ipv6_mc_sitelocal? ⇒ Boolean
(readonly)
Returns true for IPv6 multicast site-local scope address. It returns false otherwise.
#ipv6_multicast? ⇒ Boolean
(readonly)
Returns true for IPv6 multicast address (ff00::/8). It returns false otherwise.
#ipv6_sitelocal? ⇒ Boolean
(readonly)
Returns true for IPv6 site local address (ffc0::/10). It returns false otherwise.
#ipv6_unique_local? ⇒ Boolean
(readonly)
Returns true for IPv6 unique local address (fc00::/7, RFC4193). It returns false otherwise.
#ipv6_unspecified? ⇒ Boolean
(readonly)
Returns true for IPv6 unspecified address (::). It returns false otherwise.
#ipv6_v4compat? ⇒ Boolean
(readonly)
Returns true for IPv4-compatible IPv6 address (::/80). It returns false otherwise.
#ipv6_v4mapped? ⇒ Boolean
(readonly)
Returns true for IPv4-mapped IPv6 address (::ffff:0:0/80). It returns false otherwise.
#unix? ⇒ Boolean
(readonly)
Instance Method Details
#afamily ⇒ Integer
#bind
# File 'ext/socket/lib/socket.rb', line 179
def bind sock = Socket.new(self.pfamily, self.socktype, self.protocol) begin sock.ipv6only! if self.ipv6? sock.setsockopt(:SOCKET, :REUSEADDR, 1) sock.bind(self) rescue Exception sock.close raise end if block_given? begin yield sock ensure sock.close if !sock.closed? end else sock end end
#canonname ⇒ String
?
returns the canonical name as an string.
nil is returned if no canonical name.
The canonical name is set by .getaddrinfo when AI_CANONNAME is specified.
list = Addrinfo.getaddrinfo("www.ruby-lang.org", 80, :INET, :STREAM, nil, Socket::AI_CANONNAME)
p list[0] #=> #<Addrinfo: 221.186.184.68:80 TCP carbon.ruby-lang.org (www.ruby-lang.org)>
p list[0].canonname #=> "carbon.ruby-lang.org"
#connect([opts]) {|socket| ... }
#connect([opts])
creates a socket connected to the address of self.
The optional argument opts is options represented by a hash. opts may have following options:
- :timeout
-
specify the timeout in seconds.
If a block is given, it is called with the socket and the value of the block is returned. The socket is returned otherwise.
Addrinfo.tcp("www.ruby-lang.org", 80).connect {|s|
s.print "GET / HTTP/1.0\r\nHost: www.ruby-lang.org\r\n\r\n"
puts s.read
}
# File 'ext/socket/lib/socket.rb', line 139
def connect(opts={}, &block) connect_internal(nil, opts[:timeout], &block) end
#connect_from([local_addr_args], [opts]) {|socket| ... }
#connect_from([local_addr_args], [opts])
creates a socket connected to the address of self.
If one or more arguments given as local_addr_args, it is used as the local address of the socket. local_addr_args is given for family_addrinfo to obtain actual address.
If local_addr_args is not given, the local address of the socket is not bound.
The optional last argument opts is options represented by a hash. opts may have following options:
- :timeout
-
specify the timeout in seconds.
If a block is given, it is called with the socket and the value of the block is returned. The socket is returned otherwise.
Addrinfo.tcp("www.ruby-lang.org", 80).connect_from("0.0.0.0", 4649) {|s|
s.print "GET / HTTP/1.0\r\nHost: www.ruby-lang.org\r\n\r\n"
puts s.read
}
# Addrinfo object can be taken for the argument.
Addrinfo.tcp("www.ruby-lang.org", 80).connect_from(Addrinfo.tcp("0.0.0.0", 4649)) {|s|
s.print "GET / HTTP/1.0\r\nHost: www.ruby-lang.org\r\n\r\n"
puts s.read
}
# File 'ext/socket/lib/socket.rb', line 114
def connect_from(*args, &block) opts = Hash === args.last ? args.pop : {} local_addr_args = args connect_internal(family_addrinfo(*local_addr_args), opts[:timeout], &block) end
#connect_internal(local_addrinfo, timeout = nil) (private)
creates a new ::Socket connected to the address of local_addrinfo
.
If local_addrinfo is nil, the address of the socket is not bound.
The timeout specify the seconds for timeout. Errno::ETIMEDOUT
is raised when timeout occur.
If a block is given the created socket is yielded for each address.
# File 'ext/socket/lib/socket.rb', line 47
def connect_internal(local_addrinfo, timeout=nil) # :yields: socket sock = Socket.new(self.pfamily, self.socktype, self.protocol) begin sock.ipv6only! if self.ipv6? sock.bind local_addrinfo if local_addrinfo if timeout begin sock.connect_nonblock(self) rescue IO::WaitWritable if !IO.select(nil, [sock], nil, timeout) raise Errno::ETIMEDOUT, 'user specified timeout' end begin sock.connect_nonblock(self) # check connection failure rescue Errno::EISCONN end end else sock.connect(self) end rescue Exception sock.close raise end if block_given? begin yield sock ensure sock.close if !sock.closed? end else sock end end
#connect_to([remote_addr_args], [opts]) {|socket| ... }
#connect_to([remote_addr_args], [opts])
creates a socket connected to remote_addr_args and bound to self.
The optional last argument opts is options represented by a hash. opts may have following options:
- :timeout
-
specify the timeout in seconds.
If a block is given, it is called with the socket and the value of the block is returned. The socket is returned otherwise.
Addrinfo.tcp("0.0.0.0", 4649).connect_to("www.ruby-lang.org", 80) {|s|
s.print "GET / HTTP/1.0\r\nHost: www.ruby-lang.org\r\n\r\n"
puts s.read
}
# File 'ext/socket/lib/socket.rb', line 162
def connect_to(*args, &block) opts = Hash === args.last ? args.pop : {} remote_addr_args = args remote_addrinfo = family_addrinfo(*remote_addr_args) remote_addrinfo.send(:connect_internal, self, opts[:timeout], &block) end
#family_addrinfo(*args)
creates an Addrinfo
object from the arguments.
The arguments are interpreted as similar to self.
Addrinfo.tcp("0.0.0.0", 4649).family_addrinfo("www.ruby-lang.org", 80)
#=> #<Addrinfo: 221.186.184.68:80 TCP (www.ruby-lang.org:80)>
Addrinfo.unix("/tmp/sock").family_addrinfo("/tmp/sock2")
#=> #<Addrinfo: /tmp/sock2 SOCK_STREAM>
# File 'ext/socket/lib/socket.rb', line 14
def family_addrinfo(*args) if args.empty? raise ArgumentError, "no address specified" elsif Addrinfo === args.first raise ArgumentError, "too many arguments" if args.length != 1 addrinfo = args.first if (self.pfamily != addrinfo.pfamily) || (self.socktype != addrinfo.socktype) raise ArgumentError, "Addrinfo type mismatch" end addrinfo elsif self.ip? raise ArgumentError, "IP address needs host and port but #{args.length} arguments given" if args.length != 2 host, port = args Addrinfo.getaddrinfo(host, port, self.pfamily, self.socktype, self.protocol)[0] elsif self.unix? raise ArgumentError, "UNIX socket needs single path argument but #{args.length} arguments given" if args.length != 1 path, = args Addrinfo.unix(path) else raise ArgumentError, "unexpected family" end end
#getnameinfo ⇒ Array
, service
#getnameinfo(flags) ⇒ Array
, service
Array
, service
#getnameinfo(flags) ⇒ Array
, service
returns nodename and service as a pair of strings. This converts struct sockaddr in addrinfo to textual representation.
flags should be bitwise OR of Socket::NI_??? constants.
Addrinfo.tcp("127.0.0.1", 80).getnameinfo #=> ["localhost", "www"]
Addrinfo.tcp("127.0.0.1", 80).getnameinfo(Socket::NI_NUMERICSERV)
#=> ["localhost", "80"]
#inspect ⇒ String
#inspect_sockaddr ⇒ String
#ip_address ⇒ String
#ip_port ⇒ port
#ip_unpack ⇒ Array
, port
#ipv6_to_ipv4
Returns IPv4 address of IPv4 mapped/compatible IPv6 address. It returns nil if self
is not IPv4 mapped/compatible IPv6 address.
Addrinfo.ip("::192.0.2.3").ipv6_to_ipv4 #=> #<Addrinfo: 192.0.2.3>
Addrinfo.ip("::ffff:192.0.2.3").ipv6_to_ipv4 #=> #<Addrinfo: 192.0.2.3>
Addrinfo.ip("::1").ipv6_to_ipv4 #=> nil
Addrinfo.ip("192.0.2.3").ipv6_to_ipv4 #=> nil
Addrinfo.unix("/tmp/sock").ipv6_to_ipv4 #=> nil
#listen(backlog = Socket::SOMAXCONN)
creates a listening socket bound to self.
# File 'ext/socket/lib/socket.rb', line 201
def listen(backlog=Socket::SOMAXCONN) sock = Socket.new(self.pfamily, self.socktype, self.protocol) begin sock.ipv6only! if self.ipv6? sock.setsockopt(:SOCKET, :REUSEADDR, 1) sock.bind(self) sock.listen(backlog) rescue Exception sock.close raise end if block_given? begin yield sock ensure sock.close if !sock.closed? end else sock end end
#pfamily ⇒ Integer
#protocol ⇒ Integer
returns the socket type as an integer.
Addrinfo.tcp("localhost", 80).protocol == Socket::IPPROTO_TCP #=> true
#socktype ⇒ Integer
returns the socket type as an integer.
Addrinfo.tcp("localhost", 80).socktype == Socket::SOCK_STREAM #=> true
#to_sockaddr ⇒ String
#to_s ⇒ String
Also known as: #to_sockaddr
String
#to_s ⇒ String
returns the socket address as packed struct sockaddr string.
Addrinfo.tcp("localhost", 80).to_sockaddr
#=> "\x02\x00\x00P\x7F\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00"
#to_sockaddr ⇒ String
#to_s ⇒ String
String
#to_s ⇒ String
Alias for #to_s.
#unix_path ⇒ path
Returns the socket path as a string.
Addrinfo.unix("/tmp/sock").unix_path #=> "/tmp/sock"