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Handle domain names with '.' or /000 within labels.

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Only in DNSSEC mode, where we might need to validate or store
such names. In none-DNSSEC mode, simply don't cache these, as before.
This commit is contained in:
Simon Kelley
2015-04-21 22:57:06 +01:00
parent 338b340be9
commit cbe379ad6b
5 changed files with 71 additions and 13 deletions
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15
src/dnsmasq.c
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@@ -102,8 +102,19 @@ int main (int argc, char **argv)
#ifdef HAVE_DNSSEC
if (option_bool(OPT_DNSSEC_VALID))
{
daemon->keyname = safe_malloc(MAXDNAME);
daemon->workspacename = safe_malloc(MAXDNAME);
/* Note that both /000 and '.' are allowed within labels. These get
represented in presentation format using NAME_ESCAPE as an escape
character when in DNSSEC mode.
In theory, if all the characters in a name were /000 or
'.' or NAME_ESCAPE then all would have to be escaped, so the
presentation format would be twice as long as the spec.
daemon->namebuff was previously allocated by the option-reading
code before we knew if we're in DNSSEC mode, so reallocate here. */
free(daemon->namebuff);
daemon->namebuff = safe_malloc(MAXDNAME * 2);
daemon->keyname = safe_malloc(MAXDNAME * 2);
daemon->workspacename = safe_malloc(MAXDNAME * 2);
}
#endif