skarnet / s6-dns Goto Github PK

Hello, thanks for writing and maintaining s6 suite of tools.

I had quite a head-scratcher recently, because it was hard to deduce why s6-tcpclient failed with error:

s6-tcpclient: fatal: unable to init DNS: Invalid or incomplete multi-byte or wide character

I had to resort to reading sources... The problem was that I had some strange entries in /etc/hosts file:

fe80::1%lo0 localhost
0.0.0.0 0.0.0.0

Is it possible to extend error messages to inform that at least it was an error related to /etc/hosts file parsing? Or maybe ignore erroneous lines, because this file is commonly managed manually, so it is possible that it will contain some errors in it.

Since i missed it explicitely mentioned in what i read thus far, is there any DNSSEC supported built in to s6-dns and it's utilities ?

I'm wondering if you would be open to adding support to query the SPF record (next to TXT).

Background, libspf2 currently uses res_query from libc to do resolving. When using musl libc, this means resolutions are restricted to the first 512 bytes of DNS response. With SPF being in TXT records, nowadays a lot of extra info gets in there, easily exceeding this limit. (As a result spf validation fails.) s6-dns appears to be able to handle this scenario just fine, but it cannot do the SPF queries that it would do (at least I cannot find any notion of them in the s6-dns code).

I have no idea if it really is going to be feasible to plug s6-dns into libspf2, but I'm looking for possible options here to make spf validation work on musl systems.

tag is 2.3.5.4 but package/info contains 2.3.5.5
this leads to wrong install path for --enable-slashpackage