On 25.10.2012 18:57, Juha Heinanen wrote:
admin(a)sip-router.org writes:
resolve.c: make dns query only on name that has
valid syntax
the above was not accurate. it is only checked that name consists of
characters that can appear in domain name. i had to add _ char to the
valid chars, because it appears in svr names although i have not found
an rfc that would have extended the valid character set with _ char.
AFAIK there is no RFC which limits the character set. I think DNS itself
would allow any character, but there are limitations on which characters
are allowed in hostnames or certain resource records.
regards
Klaus