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* fix regression in dn_expand/reverse dns•••off-by-one error copying the name components was yielding junk at the beginning and truncating one character at the end (of every component). Rich Felker2013-08-231-1/+1
* fix length computation in dn_expand•••there are two possible points where the length is evaluated: either the first 'compression' jump, or the null terminator if no jumps have taken place yet. the previous code only measured the length of the first component. Rich Felker2013-08-141-3/+5
* de-duplicate dn_expand, fix return value and signature, clean up•••the duplicate code in dn_expand and its incorrect return values are both results of the history of the code: the version in __dns.c was originally written with no awareness of the legacy resolver API, and was later copy-and-paste duplicated to provide the legacy API. this commit is the first of a series that will restructure the internal dns code to share as much code as possible with the legacy resolver API functions. I have also removed the loop detection logic, since the output buffer length limit naturally prevents loops. in order to avoid long runtime when encountering a loop if the caller provided a ridiculously long buffer, the caller-provided length is clamped at the maximum dns name length. Rich Felker2013-08-141-21/+20
* initial check-in, version 0.5.0Rich Felker2011-02-121-0/+28