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Add IPAddr#to_bits #131

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Merged
taketo1113 merged 1 commit into from
Oct 20, 2026
Merged

Add IPAddr#to_bits #131

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24 changes: 24 additions & 0 deletions lib/ipaddr.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -205,6 +205,30 @@ def to_i
return @addr
end

# Returns a string containing the binary representation of the
# IP address value, right adjusted to the address size (32 bits
# for IPv4, 128 bits for IPv6), regardless of the prefix length.
#
# e.g.:
# require 'ipaddr'
# p IPAddr.new("192.168.1.1").to_bits
# #=> "11000000101010000000000100000001"
# p IPAddr.new("3ffe:505:2::1").to_bits
# #=> "00111111111111100000010100000101" \
# # "00000000000000100000000000000000" \
# # "00000000000000000000000000000000" \
# # "00000000000000000000000000000001"
def to_bits
case @family
when Socket::AF_INET
@addr.to_s(2).rjust(32, '0')
when Socket::AF_INET6
@addr.to_s(2).rjust(128, '0')
else
raise AddressFamilyError, "unsupported address family"
end
end

# Returns a string containing the hexadecimal representation of the
# IP address value, right adjusted to the address size.
#
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17 changes: 17 additions & 0 deletions test/test_ipaddr.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -304,6 +304,23 @@ def test_to_s_with_zone_id
assert_equal("fe80::1%0012", IPAddr.new("fe80::1%0012").to_s)
end

def test_to_bits
assert_equal("11000000101010000000000100000001", IPAddr.new("192.168.1.1").to_bits)
assert_equal("00000000000000000000000000000000", IPAddr.new("0.0.0.0").to_bits)
assert_equal("00111111111111100000010100000101" + "00000000000000100000000000000000" +
"00000000000000000000000000000000" + "00000000000000000000000000000001",
IPAddr.new("3ffe:505:2::1").to_bits)
assert_equal("00000001001000110100010101100111" + "10001001101010111100110111101111" +
"00001010101111001101111011110000" + "00010010001101000101011001111000",
IPAddr.new("123:4567:89ab:cdef:0abc:def0:1234:5678").to_bits)
assert_equal("00000000000000000000000000000000" + "00000000000000000000000000000000" +
"00000000000000000000000000000000" + "00000000000000000000000000000000",
IPAddr.new("::").to_bits)
assert_equal("11111111111111111111111111111111" + "11111111111111111111111111111111" +
"11111111111111111111111111111111" + "11111111111111111111111111111111",
IPAddr.new("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff").to_bits)
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)
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