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Handle the root of the DNS tree correctly in ares_expand_name.

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This commit is contained in:
Steinar H. Gunderson
2007-09-29 13:38:17 +00:00
parent c577d2455e
commit 49162e5b67
1 changed files with 8 additions and 0 deletions
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8
ares_expand_name.c
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@ -74,6 +74,14 @@ int ares_expand_name(const unsigned char *encoded, const unsigned char *abuf,
return ARES_ENOMEM;
q = *s;
if (len == 0) {
// RFC2181 says this should be ".": the root of the DNS tree.
// Since this function strips trailing dots though, it becomes ""
q[0] = '\0';
*enclen = 1; // the caller should move one byte to get past this
return ARES_SUCCESS;
}
/* No error-checking necessary; it was all done by name_length(). */
p = encoded;
while (*p)