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4329. [func] Warn about a common misconfiguration when forwarding

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RFC 1918 zones. [RT #41441]
This commit is contained in:
Mark Andrews
2016-03-08 10:11:23 +11:00
parent 8dbf9ceb8c
commit d6357f09aa
9 changed files with 163 additions and 0 deletions
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84
lib/dns/name.c
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@@ -2636,3 +2636,87 @@ dns_name_isdnssd(const dns_name_t *name) {
return (ISC_FALSE);
}
#define NS_NAME_INIT(A,B) \
{ \
DNS_NAME_MAGIC, \
A, sizeof(A), sizeof(B), \
DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE, \
B, NULL, { (void *)-1, (void *)-1}, \
{NULL, NULL} \
}
static unsigned char inaddr10_offsets[] = { 0, 3, 11, 16 };
static unsigned char inaddr172_offsets[] = { 0, 3, 7, 15, 20 };
static unsigned char inaddr192_offsets[] = { 0, 4, 8, 16, 21 };
static unsigned char inaddr10[] = "\00210\007IN-ADDR\004ARPA";
static unsigned char inaddr16172[] = "\00216\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr17172[] = "\00217\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr18172[] = "\00218\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr19172[] = "\00219\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr20172[] = "\00220\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr21172[] = "\00221\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr22172[] = "\00222\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr23172[] = "\00223\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr24172[] = "\00224\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr25172[] = "\00225\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr26172[] = "\00226\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr27172[] = "\00227\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr28172[] = "\00228\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr29172[] = "\00229\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr30172[] = "\00230\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr31172[] = "\00231\003172\007IN-ADDR\004ARPA";
static unsigned char inaddr168192[] = "\003168\003192\007IN-ADDR\004ARPA";
static dns_name_t const rfc1918names[] = {
NS_NAME_INIT(inaddr10, inaddr10_offsets),
NS_NAME_INIT(inaddr16172, inaddr172_offsets),
NS_NAME_INIT(inaddr17172, inaddr172_offsets),
NS_NAME_INIT(inaddr18172, inaddr172_offsets),
NS_NAME_INIT(inaddr19172, inaddr172_offsets),
NS_NAME_INIT(inaddr20172, inaddr172_offsets),
NS_NAME_INIT(inaddr21172, inaddr172_offsets),
NS_NAME_INIT(inaddr22172, inaddr172_offsets),
NS_NAME_INIT(inaddr23172, inaddr172_offsets),
NS_NAME_INIT(inaddr24172, inaddr172_offsets),
NS_NAME_INIT(inaddr25172, inaddr172_offsets),
NS_NAME_INIT(inaddr26172, inaddr172_offsets),
NS_NAME_INIT(inaddr27172, inaddr172_offsets),
NS_NAME_INIT(inaddr28172, inaddr172_offsets),
NS_NAME_INIT(inaddr29172, inaddr172_offsets),
NS_NAME_INIT(inaddr30172, inaddr172_offsets),
NS_NAME_INIT(inaddr31172, inaddr172_offsets),
NS_NAME_INIT(inaddr168192, inaddr192_offsets)
};
isc_boolean_t
dns_name_isrfc1918(const dns_name_t *name) {
size_t i;
for (i = 0; i < (sizeof(rfc1918names)/sizeof(*rfc1918names)); i++)
if (dns_name_issubdomain(name, &rfc1918names[i]))
return (ISC_TRUE);
return (ISC_FALSE);
}
static unsigned char ulaoffsets[] = { 0, 2, 4, 8, 13 };
static unsigned char ip6fc[] = "\001c\001f\003ip6\004ARPA";
static unsigned char ip6fd[] = "\001d\001f\003ip6\004ARPA";
static dns_name_t const ulanames[] = {
NS_NAME_INIT(ip6fc, ulaoffsets),
NS_NAME_INIT(ip6fd, ulaoffsets),
};
isc_boolean_t
dns_name_isula(const dns_name_t *name) {
size_t i;
for (i = 0; i < (sizeof(ulanames)/sizeof(*ulanames)); i++)
if (dns_name_issubdomain(name, &ulanames[i]))
return (ISC_TRUE);
return (ISC_FALSE);
}