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Date: Mon, 4 Jun 2018 21:39:21 +0300
From: Timo Teras <>
To: "Laurent Bercot" <>
Subject: Re: inet_ntop bug in 1.1.19

On Mon, 04 Jun 2018 14:23:55 +0000
"Laurent Bercot" <> wrote:

> >inet_ntop doesn't conform to RFC 5952 (A Recommendation for IPv6 
> >Address
> >Text Representation).
> >
> >I attached a test program to demonstrate the issue and a patch:
> >$ cc inet_ntop_test.c musl-1.1.19/src/network/inet_ntop.c
> >$ ./a.out
> >Section 4.2.2 test failed: got 2001:db8::1:1:1:1:1, expected
> >2001:db8:0:1:1:1:1:1  
> says:
>   "The use of the symbol "::" MUST be used to its maximum capability."
>   2001:db8::1:1:1:1:1 is the correct canonical text representation.

The following section 4.2.2  says:

4.2.2.  Handling One 16-Bit 0 Field

   The symbol "::" MUST NOT be used to shorten just one 16-bit 0 field.
   For example, the representation 2001:db8:0:1:1:1:1:1 is correct, but
   2001:db8::1:1:1:1:1 is not correct.

Looks like the test case is taken directly from this.


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