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Fix #ipv4_compat returning invalid prefix #86

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Merged
ioquatix merged 1 commit into from
Sep 26, 2025
+10 −1
Merged

Fix #ipv4_compat returning invalid prefix #86

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4 changes: 3 additions & 1 deletion lib/ipaddr.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -381,7 +381,9 @@ def ipv4_compat
if !ipv4?
raise InvalidAddressError, "not an IPv4 address: #{@addr}"
end
return self.clone.set(@addr, Socket::AF_INET6)
clone = self.clone.set(@addr, Socket::AF_INET6)
clone.instance_variable_set(:@mask_addr, @mask_addr | 0xffffffffffffffffffffffff00000000)
clone
end

# Returns a new ipaddr built by converting the IPv6 address into a
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7 changes: 7 additions & 0 deletions test/test_ipaddr.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -196,6 +196,13 @@ def test_ipv4_compat
}
assert_equal("::192.168.1.2", b.to_s)
assert_equal(Socket::AF_INET6, b.family)
assert_equal(128, b.prefix)

a = IPAddr.new("192.168.0.0/16")
b = a.ipv4_compat
assert_equal("::192.168.0.0", b.to_s)
assert_equal(Socket::AF_INET6, b.family)
assert_equal(112, b.prefix)
end

def test_ipv4_mapped
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