HOST_NOT_FOUND.
Any DNS record line in a zone file can be prefixed with "DELAY=" and
-a number of milliseconds (followed by whitespace).
+a number of milliseconds (followed by one space).
-Any DNS record line in a zone file can be prefixed with "DNSSEC" and
-at least one space; if all the records found by a lookup are marked
-as such then the response will have the "AD" bit set. */
+Any DNS record line in a zone file can be prefixed with "DNSSEC ";
+if all the records found by a lookup are marked
+as such then the response will have the "AD" bit set.
+
+Any DNS record line in a zone file can be prefixed with "AA "
+if all the records found by a lookup are marked
+as such then the response will have the "AA" bit set.
+
+*/
#include <ctype.h>
#include <stdarg.h>
qtypelen the length of qtype
pkptr points to the output buffer pointer; this is updated
countptr points to the record count; this is updated
+ dnssec points to the AD flag indicator; this updated
+ aa points to the AA flag indicator; this updated
Returns: 0 on success, else HOST_NOT_FOUND or NO_DATA or NO_RECOVERY or
PASS_ON - the latter if a "PASS ON NOT FOUND" line is seen
static int
find_records(FILE *f, uschar *zone, uschar *domain, uschar *qtype,
- int qtypelen, uschar **pkptr, int *countptr, BOOL * dnssec)
+ int qtypelen, uschar **pkptr, int *countptr, BOOL * dnssec, BOOL * aa)
{
int yield = HOST_NOT_FOUND;
int domainlen = Ustrlen(domain);
(void)fseek(f, 0, SEEK_SET); /* Start again at the beginning */
*dnssec = TRUE; /* cancelled by first nonsecure rec found */
+*aa = TRUE; /* cancelled by first non-authoritive record */
/* Scan for RRs */
int tvalue = typeptr->value;
int qtlen = qtypelen;
BOOL rr_sec = FALSE;
+ BOOL rr_aa = FALSE;
int delay = 0;
p = buffer;
rr_sec = TRUE;
p += 7;
}
+ else if (Ustrncmp(p, US"AA ", 3) == 0) /* tagged as authoritive */
+ {
+ rr_aa = TRUE;
+ p += 3;
+ }
else if (Ustrncmp(p, US"DELAY=", 6) == 0) /* delay before response */
{
for (p += 6; *p >= '0' && *p <= '9'; p++) delay = delay*10 + *p - '0';
- while (isspace(*p)) p++;
+ if (isspace(*p)) p++;
}
else
break;
}
- if (!isspace(*p))
+ if (!isspace(*p)) /* new domain name */
{
uschar *pp = rrdomain;
uschar *PP = RRdomain;
pp[-1] = 0;
PP[-1] = 0;
}
- }
+ } /* else use previous line's domain name */
/* Compare domain names; first check for a wildcard */
if (!rr_sec)
*dnssec = FALSE; /* cancel AD return */
+ if (!rr_aa)
+ *aa = FALSE; /* cancel AA return */
+
yield = 0;
*countptr = *countptr + 1;
{
}
+
+/*************************************************
+* Special-purpose domains *
+*************************************************/
+
+static int
+special_manyhome(uschar * packet, uschar * domain)
+{
+uschar *pk = packet + 12;
+uschar *rdlptr;
+int i, j;
+
+memset(packet, 0, 12);
+
+for (i = 104; i <= 111; i++) for (j = 0; j <= 255; j++)
+ {
+ pk = packname(domain, pk);
+ *pk++ = (ns_t_a >> 8) & 255;
+ *pk++ = (ns_t_a) & 255;
+ *pk++ = 0;
+ *pk++ = 1; /* class = IN */
+ pk += 4; /* TTL field; don't care */
+ rdlptr = pk; /* remember rdlength field */
+ pk += 2;
+
+ *pk++ = 10; *pk++ = 250; *pk++ = i; *pk++ = j;
+
+ rdlptr[0] = ((pk - rdlptr - 2) >> 8) & 255;
+ rdlptr[1] = (pk - rdlptr - 2) & 255;
+ }
+
+packet[6] = (2048 >> 8) & 255;
+packet[7] = 2048 & 255;
+packet[10] = 0;
+packet[11] = 0;
+
+(void)fwrite(packet, 1, pk - packet, stdout);
+return 0;
+}
+
+static int
+special_again(uschar * packet, uschar * domain)
+{
+int delay = atoi(CCS domain); /* digits at the start of the name */
+if (delay > 0) sleep(delay);
+return TRY_AGAIN;
+}
+
+
/*************************************************
* Entry point and main program *
*************************************************/
uschar packet[2048 * 32 + 32];
uschar *pk = packet;
BOOL dnssec;
+BOOL aa;
signal(SIGALRM, alarmfn);
for (i = 0; i < domlen; i++) domain[i] = tolower(domain[i]);
if (Ustrcmp(domain, "manyhome.test.ex") == 0 && Ustrcmp(qtype, "A") == 0)
- {
- uschar *pk = packet + 12;
- uschar *rdlptr;
- int i, j;
-
- memset(packet, 0, 12);
-
- for (i = 104; i <= 111; i++) for (j = 0; j <= 255; j++)
- {
- pk = packname(domain, pk);
- *pk++ = (ns_t_a >> 8) & 255;
- *pk++ = (ns_t_a) & 255;
- *pk++ = 0;
- *pk++ = 1; /* class = IN */
- pk += 4; /* TTL field; don't care */
- rdlptr = pk; /* remember rdlength field */
- pk += 2;
-
- *pk++ = 10; *pk++ = 250; *pk++ = i; *pk++ = j;
-
- rdlptr[0] = ((pk - rdlptr - 2) >> 8) & 255;
- rdlptr[1] = (pk - rdlptr - 2) & 255;
- }
-
- packet[6] = (2048 >> 8) & 255;
- packet[7] = 2048 & 255;
- packet[10] = 0;
- packet[11] = 0;
-
- (void)fwrite(packet, 1, pk - packet, stdout);
- return 0;
- }
+ return special_manyhome(packet, domain);
+else if (domlen >= 14 && Ustrcmp(domain + domlen - 14, "test.again.dns") == 0)
+ return special_again(packet, domain);
+else if (domlen >= 13 && Ustrcmp(domain + domlen - 13, "test.fail.dns") == 0)
+ return NO_RECOVERY;
if (Ustrchr(domain, '.') == NULL && qualify != NULL &&
/* Find the records we want, and add them to the result. */
count = 0;
-yield = find_records(f, zone, domain, qtype, qtypelen, &pk, &count, &dnssec);
+yield = find_records(f, zone, domain, qtype, qtypelen, &pk, &count, &dnssec, &aa);
if (yield == NO_RECOVERY) goto END_OFF;
packet[6] = (count >> 8) & 255;
if (dnssec)
((HEADER *)packet)->ad = 1;
+if (aa)
+ ((HEADER *)packet)->aa = 1;
+
/* Close the zone file, write the result, and return. */
END_OFF:
return yield;
}
-/* vi: aw ai sw=2
+/* vi: aw ai sw=2 sts=2 ts=8 et
*/
/* End of fakens.c */
git://git.exim.org / users / heiko / exim.git / blobdiff