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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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16
src/rfc1035.c
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@@ -128,6 +128,15 @@ int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
if (isExtract)
{
unsigned char c = *p;
#ifdef HAVE_DNSSEC
if (option_bool(OPT_DNSSEC_VALID))
{
if (c == 0 || c == '.' || c == NAME_ESCAPE)
*cp++ = NAME_ESCAPE;
*cp++ = c;
}
else
#endif
if (c != 0 && c != '.')
*cp++ = c;
else
@@ -144,9 +153,14 @@ int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
cp++;
if (c1 >= 'A' && c1 <= 'Z')
c1 += 'a' - 'A';
#ifdef HAVE_DNSSEC
if (option_bool(OPT_DNSSEC_VALID) && c1 == NAME_ESCAPE)
c1 = *cp++;
#endif
if (c2 >= 'A' && c2 <= 'Z')
c2 += 'a' - 'A';
if (c1 != c2)
retvalue = 2;
}