Class: IPAddr
Relationships & Source Files | |
Namespace Children | |
Exceptions:
| |
Super Chains via Extension / Inclusion / Inheritance | |
Instance Chain:
self,
Comparable
|
|
Inherits: | Object |
Defined in: | lib/ipaddr.rb |
Overview
IPAddr
provides a set of methods to manipulate an IP address. Both IPv4 and IPv6 are supported.
Example
require 'ipaddr'
ipaddr1 = IPAddr.new "3ffe:505:2::1"
p ipaddr1 #=> #<IPAddr: IPv6:3ffe:0505:0002:0000:0000:0000:0000:0001/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff>
p ipaddr1.to_s #=> "3ffe:505:2::1"
ipaddr2 = ipaddr1.mask(48) #=> #<IPAddr: IPv6:3ffe:0505:0002:0000:0000:0000:0000:0000/ffff:ffff:ffff:0000:0000:0000:0000:0000>
p ipaddr2.to_s #=> "3ffe:505:2::"
ipaddr3 = IPAddr.new "192.168.2.0/24"
p ipaddr3 #=> #<IPAddr: IPv4:192.168.2.0/255.255.255.0>
Constant Summary
-
IN4MASK =
32 bit mask for IPv4
0xffffffff
-
IN6FORMAT =
Format string for IPv6
(["%.4x"] * 8).join(':')
-
IN6MASK =
128 bit mask for IPv6
0xffffffffffffffffffffffffffffffff
-
RE_IPV4ADDRLIKE =
Regexp internally used for parsing IPv4 address.
%r{ \A (\d+) \. (\d+) \. (\d+) \. (\d+) \z }x
-
RE_IPV6ADDRLIKE_COMPRESSED =
Regexp internally used for parsing IPv6 address.
%r{ \A ( (?: (?: [\da-f]{1,4} : )* [\da-f]{1,4} )? ) :: ( (?: ( (?: [\da-f]{1,4} : )* ) (?: [\da-f]{1,4} | (\d+) \. (\d+) \. (\d+) \. (\d+) ) )? ) \z }xi
-
RE_IPV6ADDRLIKE_FULL =
Regexp internally used for parsing IPv6 address.
%r{ \A (?: (?: [\da-f]{1,4} : ){7} [\da-f]{1,4} | ( (?: [\da-f]{1,4} : ){6} ) (\d+) \. (\d+) \. (\d+) \. (\d+) ) \z }xi
-
VERSION =
# File 'lib/ipaddr.rb', line 43"1.2.4"
Class Method Summary
-
.new_ntoh(addr)
Creates a new ipaddr containing the given network byte ordered string form of an IP address.
-
.ntop(addr)
Convert a network byte ordered string form of an IP address into human readable form.
-
.new(addr = '::', family = Socket::AF_UNSPEC) ⇒ IPAddr
constructor
private
Creates a new ipaddr object either from a human readable IP address representation in string, or from a packed in_addr value followed by an address family.
Instance Attribute Summary
-
#family
readonly
Returns the address family of this IP address.
-
#ipv4? ⇒ Boolean
readonly
Returns true if the ipaddr is an IPv4 address.
-
#ipv4_compat? ⇒ Boolean
readonly
Returns true if the ipaddr is an IPv4-compatible IPv6 address.
-
#ipv4_mapped? ⇒ Boolean
readonly
Returns true if the ipaddr is an IPv4-mapped IPv6 address.
-
#ipv6? ⇒ Boolean
readonly
Returns true if the ipaddr is an IPv6 address.
-
#link_local? ⇒ Boolean
readonly
Returns true if the ipaddr is a link-local address.
-
#loopback? ⇒ Boolean
readonly
Returns true if the ipaddr is a loopback address.
-
#prefix
rw
Returns the prefix length in bits for the ipaddr.
-
#prefix=(prefix)
rw
Sets the prefix length in bits.
-
#private? ⇒ Boolean
readonly
Returns true if the ipaddr is a private address.
-
#zone_id
rw
Returns the IPv6 zone identifier, if present.
-
#zone_id=(zid)
rw
Returns the IPv6 zone identifier, if present.
- #_ipv4_compat? ⇒ Boolean readonly private
Instance Method Summary
-
#&(other)
Returns a new ipaddr built by bitwise AND.
-
#<<(num)
Returns a new ipaddr built by bitwise left shift.
-
#<=>(other)
Compares the ipaddr with another.
-
#==(other)
Returns true if two ipaddrs are equal.
-
#===(other)
Alias for #include?.
-
#>>(num)
Returns a new ipaddr built by bitwise right-shift.
-
#eql?(other) ⇒ Boolean
Checks equality used by Hash.
-
#hash
Returns a hash value used by Hash, Set, and Array classes.
-
#hton
Returns a network byte ordered string form of the IP address.
-
#include?(other) ⇒ Boolean
(also: #===)
Returns true if the given ipaddr is in the range.
-
#inspect
Returns a string containing a human-readable representation of the ipaddr.
-
#ip6_arpa
Returns a string for DNS reverse lookup compatible with RFC3172.
-
#ip6_int
Returns a string for DNS reverse lookup compatible with RFC1886.
-
#ipv4_compat
readonly
Returns a new ipaddr built by converting the native IPv4 address into an IPv4-compatible IPv6 address.
-
#ipv4_mapped
readonly
Returns a new ipaddr built by converting the native IPv4 address into an IPv4-mapped IPv6 address.
-
#mask(prefixlen)
Returns a new ipaddr built by masking IP address with the given prefixlen/netmask.
-
#native
Returns a new ipaddr built by converting the IPv6 address into a native IPv4 address.
-
#netmask
Returns the netmask in string format e.g.
-
#reverse
Returns a string for DNS reverse lookup.
-
#succ
Returns the successor to the ipaddr.
-
#to_i
Returns the integer representation of the ipaddr.
-
#to_range
Creates a Range object for the network address.
-
#to_s
Returns a string containing the IP address representation.
-
#to_string
Returns a string containing the IP address representation in canonical form.
-
#|(other)
Returns a new ipaddr built by bitwise OR.
-
#~
Returns a new ipaddr built by bitwise negation.
-
#mask!(mask)
protected
Set current netmask to given mask.
-
#set(addr, *family)
protected
Set @addr, the internal stored ip address, to given
addr
. - #_reverse private
- #_to_string(addr) private
- #addr_mask(addr) private
- #coerce_other(other) private
- #in6_addr(left) private
- #in_addr(addr) private
Constructor Details
.new(addr = '::', family = Socket::AF_UNSPEC) ⇒ IPAddr
(private)
Creates a new ipaddr object either from a human readable IP address representation in string, or from a packed in_addr value followed by an address family.
In the former case, the following are the valid formats that will be recognized: “address”, “address/prefixlen” and “address/mask”, where IPv6 address may be enclosed in square brackets (‘[’ and ‘]’). If a prefixlen or a mask is specified, it returns a masked IP address. Although the address family is determined automatically from a specified string, you can specify one explicitly by the optional second argument.
Otherwise an IP address is generated from a packed in_addr value and an address family.
The IPAddr class defines many methods and operators, and some of those, such as &, |, include? and ==, accept a string, or a packed in_addr value instead of an IPAddr
object.
# File 'lib/ipaddr.rb', line 585
def initialize(addr = '::', family = Socket::AF_UNSPEC) @mask_addr = nil if !addr.kind_of?(String) case family when Socket::AF_INET, Socket::AF_INET6 set(addr.to_i, family) @mask_addr = (family == Socket::AF_INET) ? IN4MASK : IN6MASK return when Socket::AF_UNSPEC raise AddressFamilyError, "address family must be specified" else raise AddressFamilyError, "unsupported address family: #{family}" end end prefix, prefixlen = addr.split('/', 2) if prefix =~ /\A\[(.*)\]\z/i prefix = $1 family = Socket::AF_INET6 end if prefix =~ /\A(.*)(%\w+)\z/ prefix = $1 zone_id = $2 family = Socket::AF_INET6 end # It seems AI_NUMERICHOST doesn't do the job. #Socket.getaddrinfo(left, nil, Socket::AF_INET6, Socket::SOCK_STREAM, nil, # Socket::AI_NUMERICHOST) @addr = @family = nil if family == Socket::AF_UNSPEC || family == Socket::AF_INET @addr = in_addr(prefix) if @addr @family = Socket::AF_INET end end if !@addr && (family == Socket::AF_UNSPEC || family == Socket::AF_INET6) @addr = in6_addr(prefix) @family = Socket::AF_INET6 end @zone_id = zone_id if family != Socket::AF_UNSPEC && @family != family raise AddressFamilyError, "address family mismatch" end if prefixlen mask!(prefixlen) else @mask_addr = (@family == Socket::AF_INET) ? IN4MASK : IN6MASK end end
Class Method Details
.new_ntoh(addr)
Creates a new ipaddr containing the given network byte ordered string form of an IP address.
.ntop(addr)
Convert a network byte ordered string form of an IP address into human readable form.
# File 'lib/ipaddr.rb', line 113
def self.ntop(addr) case addr.size when 4 addr.unpack('C4').join('.') when 16 IN6FORMAT % addr.unpack('n8') else raise AddressFamilyError, "unsupported address family" end end
Instance Attribute Details
#_ipv4_compat? ⇒ Boolean
(readonly, private)
[ GitHub ]
#family (readonly)
Returns the address family of this IP address.
# File 'lib/ipaddr.rb', line 103
attr_reader :family
#ipv4? ⇒ Boolean
(readonly)
Returns true if the ipaddr is an IPv4 address.
# File 'lib/ipaddr.rb', line 242
def ipv4? return @family == Socket::AF_INET end
#ipv4_compat? ⇒ Boolean
(readonly)
Returns true if the ipaddr is an IPv4-compatible IPv6 address.
# File 'lib/ipaddr.rb', line 301
def ipv4_compat? warn "IPAddr\##{__callee__} is obsolete", uplevel: 1 if $VERBOSE _ipv4_compat? end
#ipv4_mapped? ⇒ Boolean
(readonly)
Returns true if the ipaddr is an IPv4-mapped IPv6 address.
# File 'lib/ipaddr.rb', line 296
def ipv4_mapped? return ipv6? && (@addr >> 32) == 0xffff end
#ipv6? ⇒ Boolean
(readonly)
Returns true if the ipaddr is an IPv6 address.
#link_local? ⇒ Boolean
(readonly)
Returns true if the ipaddr is a link-local address. IPv4 addresses in 169.254.0.0/16 reserved by RFC 3927 and Link-Local IPv6 Unicast Addresses in fe80::/10 reserved by RFC 4291 are considered link-local.
# File 'lib/ipaddr.rb', line 284
def link_local? case @family when Socket::AF_INET @addr & 0xffff0000 == 0xa9fe0000 # 169.254.0.0/16 when Socket::AF_INET6 @addr & 0xffc0_0000_0000_0000_0000_0000_0000_0000 == 0xfe80_0000_0000_0000_0000_0000_0000_0000 else raise AddressFamilyError, "unsupported address family" end end
#loopback? ⇒ Boolean
(readonly)
Returns true if the ipaddr is a loopback address.
# File 'lib/ipaddr.rb', line 252
def loopback? case @family when Socket::AF_INET @addr & 0xff000000 == 0x7f000000 when Socket::AF_INET6 @addr == 1 else raise AddressFamilyError, "unsupported address family" end end
#prefix (rw)
Returns the prefix length in bits for the ipaddr.
#prefix=(prefix) (rw)
Sets the prefix length in bits
# File 'lib/ipaddr.rb', line 437
def prefix=(prefix) case prefix when Integer mask!(prefix) else raise InvalidPrefixError, "prefix must be an integer: #{@addr}" end end
#private? ⇒ Boolean
(readonly)
Returns true if the ipaddr is a private address. IPv4 addresses in 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 as defined in RFC 1918 and IPv6 Unique Local Addresses in fc00::/7 as defined in RFC 4193 are considered private.
# File 'lib/ipaddr.rb', line 267
def private? case @family when Socket::AF_INET @addr & 0xff000000 == 0x0a000000 || # 10.0.0.0/8 @addr & 0xfff00000 == 0xac100000 || # 172.16.0.0/12 @addr & 0xffff0000 == 0xc0a80000 # 192.168.0.0/16 when Socket::AF_INET6 @addr & 0xfe00_0000_0000_0000_0000_0000_0000_0000 == 0xfc00_0000_0000_0000_0000_0000_0000_0000 else raise AddressFamilyError, "unsupported address family" end end
#zone_id (rw)
Returns the IPv6 zone identifier, if present. Raises InvalidAddressError if not an IPv6 address.
# File 'lib/ipaddr.rb', line 469
def zone_id if @family == Socket::AF_INET6 @zone_id else raise InvalidAddressError, "not an IPv6 address" end end
#zone_id=(zid) (rw)
Returns the IPv6 zone identifier, if present. Raises InvalidAddressError if not an IPv6 address.
# File 'lib/ipaddr.rb', line 479
def zone_id=(zid) if @family == Socket::AF_INET6 case zid when nil, /\A%(\w+)\z/ @zone_id = zid else raise InvalidAddressError, "invalid zone identifier for address" end else raise InvalidAddressError, "not an IPv6 address" end end
Instance Method Details
#&(other)
Returns a new ipaddr built by bitwise AND.
# File 'lib/ipaddr.rb', line 125
def &(other) return self.clone.set(@addr & coerce_other(other).to_i) end
#<<(num)
Returns a new ipaddr built by bitwise left shift.
#<=>(other)
Compares the ipaddr with another.
# File 'lib/ipaddr.rb', line 382
def <=>(other) other = coerce_other(other) rescue nil else @addr <=> other.to_i if other.family == @family end
#==(other)
Returns true if two ipaddrs are equal.
# File 'lib/ipaddr.rb', line 150
def ==(other) other = coerce_other(other) rescue false else @family == other.family && @addr == other.to_i end
#===(other)
Alias for #include?.
# File 'lib/ipaddr.rb', line 183
alias === include?
#>>(num)
Returns a new ipaddr built by bitwise right-shift.
# File 'lib/ipaddr.rb', line 135
def >>(num) return self.clone.set(@addr >> num) end
#_reverse (private)
[ GitHub ]# File 'lib/ipaddr.rb', line 708
def _reverse case @family when Socket::AF_INET return (0..3).map { |i| (@addr >> (8 * i)) & 0xff }.join('.') when Socket::AF_INET6 return ("%.32x" % @addr).reverse!.gsub!(/.(?!$)/, '\&.') else raise AddressFamilyError, "unsupported address family" end end
#_to_string(addr) (private)
[ GitHub ]# File 'lib/ipaddr.rb', line 721
def _to_string(addr) case @family when Socket::AF_INET return (0..3).map { |i| (addr >> (24 - 8 * i)) & 0xff }.join('.') when Socket::AF_INET6 return (("%.32x" % addr).gsub!(/.{4}(?!$)/, '\&:')) else raise AddressFamilyError, "unsupported address family" end end
#addr_mask(addr) (private)
[ GitHub ]#coerce_other(other) (private)
[ GitHub ]
#eql?(other) ⇒ Boolean
Checks equality used by Hash.
#hash
Returns a hash value used by Hash, Set, and Array classes
# File 'lib/ipaddr.rb', line 397
def hash return ([@addr, @mask_addr, @zone_id].hash << 1) | (ipv4? ? 0 : 1) end
#hton
Returns a network byte ordered string form of the IP address.
# File 'lib/ipaddr.rb', line 228
def hton case @family when Socket::AF_INET return [@addr].pack('N') when Socket::AF_INET6 return (0..7).map { |i| (@addr >> (112 - 16 * i)) & 0xffff }.pack('n8') else raise AddressFamilyError, "unsupported address family" end end
#in6_addr(left) (private)
[ GitHub ]# File 'lib/ipaddr.rb', line 660
def in6_addr(left) case left when RE_IPV6ADDRLIKE_FULL if $2 addr = in_addr($~[2,4]) left = $1 + ':' else addr = 0 end right = '' when RE_IPV6ADDRLIKE_COMPRESSED if $4 left.count(':') <= 6 or raise InvalidAddressError, "invalid address: #{@addr}" addr = in_addr($~[4,4]) left = $1 right = $3 + '0:0' else left.count(':') <= ($1.empty? || $2.empty? ? 8 : 7) or raise InvalidAddressError, "invalid address: #{@addr}" left = $1 right = $2 addr = 0 end else raise InvalidAddressError, "invalid address: #{@addr}" end l = left.split(':') r = right.split(':') rest = 8 - l.size - r.size if rest < 0 return nil end (l + Array.new(rest, '0') + r).inject(0) { |i, s| i << 16 | s.hex } | addr end
#in_addr(addr) (private)
[ GitHub ]# File 'lib/ipaddr.rb', line 645
def in_addr(addr) case addr when Array octets = addr else m = RE_IPV4ADDRLIKE.match(addr) or return nil octets = m.captures end octets.inject(0) { |i, s| (n = s.to_i) < 256 or raise InvalidAddressError, "invalid address: #{@addr}" s.match(/\A0./) and raise InvalidAddressError, "zero-filled number in IPv4 address is ambiguous: #{@addr}" i << 8 | n } end
#include?(other) ⇒ Boolean
Also known as: #===
Returns true if the given ipaddr is in the range.
e.g.:
require 'ipaddr'
net1 = IPAddr.new("192.168.2.0/24")
net2 = IPAddr.new("192.168.2.100")
net3 = IPAddr.new("192.168.3.0")
net4 = IPAddr.new("192.168.2.0/16")
p net1.include?(net2) #=> true
p net1.include?(net3) #=> false
p net1.include?(net4) #=> false
p net4.include?(net1) #=> true
# File 'lib/ipaddr.rb', line 176
def include?(other) other = coerce_other(other) return false unless other.family == family range = to_range other = other.to_range range.begin <= other.begin && range.end >= other.end end
#inspect
Returns a string containing a human-readable representation of the ipaddr. (“#<IPAddr: family:address/mask>”)
# File 'lib/ipaddr.rb', line 448
def inspect case @family when Socket::AF_INET af = "IPv4" when Socket::AF_INET6 af = "IPv6" zone_id = @zone_id.to_s else raise AddressFamilyError, "unsupported address family" end return sprintf("#<%s: %s:%s%s/%s>", self.class.name, af, _to_string(@addr), zone_id, _to_string(@mask_addr)) end
#ip6_arpa
Returns a string for DNS reverse lookup compatible with RFC3172.
# File 'lib/ipaddr.rb', line 361
def ip6_arpa if !ipv6? raise InvalidAddressError, "not an IPv6 address: #{@addr}" end return _reverse + ".ip6.arpa" end
#ip6_int
Returns a string for DNS reverse lookup compatible with RFC1886.
# File 'lib/ipaddr.rb', line 369
def ip6_int if !ipv6? raise InvalidAddressError, "not an IPv6 address: #{@addr}" end return _reverse + ".ip6.int" end
#ipv4_compat (readonly)
Returns a new ipaddr built by converting the native IPv4 address into an IPv4-compatible IPv6 address.
# File 'lib/ipaddr.rb', line 329
def ipv4_compat warn "IPAddr\##{__callee__} is obsolete", uplevel: 1 if $VERBOSE if !ipv4? raise InvalidAddressError, "not an IPv4 address: #{@addr}" end return self.clone.set(@addr, Socket::AF_INET6) end
#ipv4_mapped (readonly)
Returns a new ipaddr built by converting the native IPv4 address into an IPv4-mapped IPv6 address.
# File 'lib/ipaddr.rb', line 318
def ipv4_mapped if !ipv4? raise InvalidAddressError, "not an IPv4 address: #{@addr}" end clone = self.clone.set(@addr | 0xffff00000000, Socket::AF_INET6) clone.instance_variable_set(:@mask_addr, @mask_addr | 0xffffffffffffffffffffffff00000000) clone end
#mask(prefixlen)
Returns a new ipaddr built by masking IP address with the given prefixlen/netmask. (e.g. 8, 64, “255.255.255.0”, etc.)
# File 'lib/ipaddr.rb', line 160
def mask(prefixlen) return self.clone.mask!(prefixlen) end
#mask!(mask) (protected)
Set current netmask to given mask.
# File 'lib/ipaddr.rb', line 521
def mask!(mask) case mask when String case mask when /\A(0|[1-9]+\d*)\z/ prefixlen = mask.to_i when /\A\d+\z/ raise InvalidPrefixError, "leading zeros in prefix" else m = IPAddr.new(mask) if m.family != @family raise InvalidPrefixError, "address family is not same: #{@addr}" end @mask_addr = m.to_i n = @mask_addr ^ m.instance_variable_get(:@mask_addr) unless ((n + 1) & n).zero? raise InvalidPrefixError, "invalid mask #{mask}: #{@addr}" end @addr &= @mask_addr return self end else prefixlen = mask end case @family when Socket::AF_INET if prefixlen < 0 || prefixlen > 32 raise InvalidPrefixError, "invalid length: #{@addr}" end masklen = 32 - prefixlen @mask_addr = ((IN4MASK >> masklen) << masklen) when Socket::AF_INET6 if prefixlen < 0 || prefixlen > 128 raise InvalidPrefixError, "invalid length: #{@addr}" end masklen = 128 - prefixlen @mask_addr = ((IN6MASK >> masklen) << masklen) else raise AddressFamilyError, "unsupported address family" end @addr = ((@addr >> masklen) << masklen) return self end
#native
Returns a new ipaddr built by converting the IPv6 address into a native IPv4 address. If the IP address is not an IPv4-mapped or IPv4-compatible IPv6 address, returns self.
# File 'lib/ipaddr.rb', line 340
def native if !ipv4_mapped? && !_ipv4_compat? return self end return self.clone.set(@addr & IN4MASK, Socket::AF_INET) end
#netmask
Returns the netmask in string format e.g. 255.255.0.0
# File 'lib/ipaddr.rb', line 463
def netmask _to_string(@mask_addr) end
#reverse
Returns a string for DNS reverse lookup. It returns a string in RFC3172 form for an IPv6 address.
#set(addr, *family) (protected)
Set @addr, the internal stored ip address, to given addr
. The parameter addr
is validated using the first #family member, which is Socket::AF_INET
or Socket::AF_INET6.
# File 'lib/ipaddr.rb', line 497
def set(addr, *family) case family[0] ? family[0] : @family when Socket::AF_INET if addr < 0 || addr > IN4MASK raise InvalidAddressError, "invalid address: #{@addr}" end when Socket::AF_INET6 if addr < 0 || addr > IN6MASK raise InvalidAddressError, "invalid address: #{@addr}" end else raise AddressFamilyError, "unsupported address family" end @addr = addr if family[0] @family = family[0] if @family == Socket::AF_INET @mask_addr &= IN4MASK end end return self end
#succ
Returns the successor to the ipaddr.
# File 'lib/ipaddr.rb', line 377
def succ return self.clone.set(@addr + 1, @family) end
#to_i
Returns the integer representation of the ipaddr.
# File 'lib/ipaddr.rb', line 186
def to_i return @addr end
#to_range
Creates a Range object for the network address.
# File 'lib/ipaddr.rb', line 402
def to_range begin_addr = (@addr & @mask_addr) case @family when Socket::AF_INET end_addr = (@addr | (IN4MASK ^ @mask_addr)) when Socket::AF_INET6 end_addr = (@addr | (IN6MASK ^ @mask_addr)) else raise AddressFamilyError, "unsupported address family" end self.class.new(begin_addr, @family)..self.class.new(end_addr, @family) end
#to_s
Returns a string containing the IP address representation.
# File 'lib/ipaddr.rb', line 191
def to_s str = to_string return str if ipv4? str.gsub!(/\b0{1,3}([\da-f]+)\b/i, '\1') loop do break if str.sub!(/\A0:0:0:0:0:0:0:0\z/, '::') break if str.sub!(/\b0:0:0:0:0:0:0\b/, ':') break if str.sub!(/\b0:0:0:0:0:0\b/, ':') break if str.sub!(/\b0:0:0:0:0\b/, ':') break if str.sub!(/\b0:0:0:0\b/, ':') break if str.sub!(/\b0:0:0\b/, ':') break if str.sub!(/\b0:0\b/, ':') break end str.sub!(/:{3,}/, '::') if /\A::(ffff:)?([\da-f]{1,4}):([\da-f]{1,4})\z/i =~ str str = sprintf('::%s%d.%d.%d.%d', $1, $2.hex / 256, $2.hex % 256, $3.hex / 256, $3.hex % 256) end str end
#to_string
Returns a string containing the IP address representation in canonical form.
# File 'lib/ipaddr.rb', line 217
def to_string str = _to_string(@addr) if @family == Socket::AF_INET6 str << zone_id.to_s end return str end
#|(other)
Returns a new ipaddr built by bitwise OR.
# File 'lib/ipaddr.rb', line 130
def |(other) return self.clone.set(@addr | coerce_other(other).to_i) end
#~
Returns a new ipaddr built by bitwise negation.