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Add IPAddr#to_hex #126

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Merged
taketo1113 merged 1 commit into from
Oct 17, 2026
Merged

Add IPAddr#to_hex #126

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29 changes: 22 additions & 7 deletions lib/ipaddr.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -205,6 +205,24 @@ def to_i
return @addr
end

# Returns a string containing the hexadecimal representation of the
# IP address value, right adjusted to the address size.
#
# e.g.:
# require 'ipaddr'
# p IPAddr.new("192.168.1.1").to_hex #=> "c0a80101"
# p IPAddr.new("3ffe:505:2::1").to_hex #=> "3ffe0505000200000000000000000001"
def to_hex
case @family
when Socket::AF_INET
@addr.to_s(16).rjust(8, '0')
when Socket::AF_INET6
@addr.to_s(16).rjust(32, '0')
else
raise AddressFamilyError, "unsupported address family"
end
end

# Returns a string containing the IP address representation.
def to_s
str = _to_string(@addr)
Expand Down Expand Up @@ -268,12 +286,9 @@ def cidr
# Returns a network byte ordered string form of the IP address.
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')
when Socket::AF_INET, Socket::AF_INET6
value = to_hex
return [value].pack("H#{value.length}")
else
raise AddressFamilyError, "unsupported address family"
end
Expand Down Expand Up @@ -829,7 +844,7 @@ def _reverse
(@addr >> (8 * i)) & 0xff
}.join('.')
when Socket::AF_INET6
return ("%.32x" % @addr).reverse!.gsub!(/.(?!$)/, '\&.')
return to_hex.reverse.chars.join('.')
else
raise AddressFamilyError, "unsupported address family"
end
Expand Down
10 changes: 10 additions & 0 deletions test/test_ipaddr.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -295,6 +295,16 @@ def test_to_s_with_zone_id
assert_equal("fe80::1%0012", IPAddr.new("fe80::1%0012").to_s)
end

def test_to_hex
assert_equal("c0a80101", IPAddr.new("192.168.1.1").to_hex)
assert_equal("00000000", IPAddr.new("0.0.0.0").to_hex)
assert_equal("ffffffff", IPAddr.new("255.255.255.255").to_hex)
assert_equal("3ffe0505000200000000000000000001", IPAddr.new("3ffe:505:2::1").to_hex)
assert_equal("0123456789abcdef0abcdef012345678", IPAddr.new("123:4567:89ab:cdef:0abc:def0:1234:5678").to_hex)
assert_equal("00000000000000000000000000000000", IPAddr.new("::").to_hex)
assert_equal("ffffffffffffffffffffffffffffffff", IPAddr.new("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff").to_hex)
end

def test_as_json
assert_equal("192.168.1.2", IPAddr.new("192.168.1.2").as_json)
assert_equal("192.168.1.0/24", IPAddr.new("192.168.1.2/24").as_json)
Expand Down
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