Docs: usability of malware ACL condition

[users/jgh/exim.git] / test / src / fakens.c

diff --git a/test/src/fakens.c b/test/src/fakens.c
index e4584c4df715f25ef90fc90752a3d99ca199177a..6d8a99df553405c8076f1ef6fe7353b0739c2ae9 100644 (file)
--- a/test/src/fakens.c
+++ b/test/src/fakens.c
@@ -25,7 +25,7 @@ The arguments to the program are:
   the DNS record type that is being sought
 
 The output from the program is written to stdout. It is supposed to be in
   the DNS record type that is being sought
 
 The output from the program is written to stdout. It is supposed to be in

-exactly the same format as a traditional namserver response (see RFC 1035) so
+exactly the same format as a traditional nameserver response (see RFC 1035) so

 that Exim can process it as normal. At present, no compression is used.
 Error messages are written to stderr.
 
 that Exim can process it as normal. At present, no compression is used.
 Error messages are written to stderr.
 


@@ -53,11 +53,15 @@ HOST_NOT_FOUND.
 Any DNS record line in a zone file can be prefixed with "DELAY=" and
 a number of milliseconds (followed by one space).
 
 Any DNS record line in a zone file can be prefixed with "DELAY=" and
 a number of milliseconds (followed by one space).
 

-Any DNS record line in a zone file can be prefixed with "DNSSEC ";
+Any DNS record line 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.
 
 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 "
+Any DNS record line can be prefixed with "NXDOMAIN ";
+The record will be ignored (but the prefix set still applied);
+This lets us return a DNSSEC NXDOMAIN (=> HOST_NOT_FOUND).
+
+Any DNS record line 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.
 
 if all the records found by a lookup are marked
 as such then the response will have the "AA" bit set.
 


@@ -342,9 +346,6 @@ if (typeptr->name == NULL)
 rrdomain[0] = 0;                 /* No previous domain */
 (void)fseek(f, 0, SEEK_SET);     /* Start again at the beginning */
 
 rrdomain[0] = 0;                 /* No previous domain */
 (void)fseek(f, 0, SEEK_SET);     /* Start again at the beginning */
 

-if (dnssec) *dnssec = TRUE;     /* cancelled by first nonsecure rec found */
-if (aa) *aa = TRUE;             /* cancelled by first non-aa rec found */
-

 /* Scan for RRs */
 
 while (fgets(CS buffer, sizeof(buffer), f) != NULL)
 /* Scan for RRs */
 
 while (fgets(CS buffer, sizeof(buffer), f) != NULL)


@@ -357,6 +358,7 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
   int qtlen = qtypelen;
   BOOL rr_sec = FALSE;
   BOOL rr_aa = FALSE;
   int qtlen = qtypelen;
   BOOL rr_sec = FALSE;
   BOOL rr_aa = FALSE;

+  BOOL rr_ignore = FALSE;

   int delay = 0;
   uint ttl = DEFAULT_TTL;
 
   int delay = 0;
   uint ttl = DEFAULT_TTL;
 


@@ -382,7 +384,12 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
       rr_sec = TRUE;
       p += 7;
       }
       rr_sec = TRUE;
       p += 7;
       }

-    else if (Ustrncmp(p, US"AA ", 3) == 0)      /* tagged as authoritive */
+    if (Ustrncmp(p, US"NXDOMAIN ", 9) == 0)     /* ignore record content */
+      {
+      rr_ignore = TRUE;
+      p += 9;
+      }
+    else if (Ustrncmp(p, US"AA ", 3) == 0)      /* tagged as authoritative */

       {
       rr_aa = TRUE;
       p += 3;
       {
       rr_aa = TRUE;
       p += 3;


@@ -438,7 +445,12 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
 
   /* The domain matches */
 
 
   /* The domain matches */
 

-  if (yield == HOST_NOT_FOUND) yield = NO_DATA;
+  if (yield == HOST_NOT_FOUND)
+    {
+    yield = NO_DATA;
+    if (dnssec) *dnssec = TRUE;     /* cancelled by first nonsecure rec found */
+    if (aa) *aa = TRUE;             /* cancelled by first non-aa rec found */
+    }

 
   /* Compare RR types; a CNAME record is always returned */
 
 
   /* Compare RR types; a CNAME record is always returned */
 


@@ -462,6 +474,8 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
   if (aa && !rr_aa)
     *aa = FALSE;                        /* cancel AA return */
 
   if (aa && !rr_aa)
     *aa = FALSE;                        /* cancel AA return */
 

+  if (rr_ignore) continue;
+

   yield = 0;
   *countptr = *countptr + 1;
 
   yield = 0;
   *countptr = *countptr + 1;
 


@@ -749,22 +763,23 @@ if (zonefile == NULL)
 
 (void)sprintf(CS buffer, "%s/dnszones/%s", argv[1], zonefile);
 
 
 (void)sprintf(CS buffer, "%s/dnszones/%s", argv[1], zonefile);
 

-/* Initialize the start of the response packet. We don't have to fake up
-everything, because we know that Exim will look only at the answer and
-additional section parts. */
+/* Initialize the start of the response packet. */

 
 memset(packet, 0, 12);
 pk += 12;
 
 /* Open the zone file. */
 
 
 memset(packet, 0, 12);
 pk += 12;
 
 /* Open the zone file. */
 

-f = fopen(CS buffer, "r");
-if (f == NULL)
+if (!(f = fopen(CS buffer, "r")))

   {
   fprintf(stderr, "fakens: failed to open %s: %s\n", buffer, strerror(errno));
   return NO_RECOVERY;
   }
 
   {
   fprintf(stderr, "fakens: failed to open %s: %s\n", buffer, strerror(errno));
   return NO_RECOVERY;
   }
 

+header->qr = 1;     /* query */
+header->opcode = QUERY; /* standard query */
+header->tc = 0;     /* no trucation */
+

 /* Find the records we want, and add them to the result. */
 
 count = 0;
 /* Find the records we want, and add them to the result. */
 
 count = 0;


@@ -773,14 +788,16 @@ if (yield == NO_RECOVERY) goto END_OFF;
 header->ancount = htons(count);
 
 /* If the AA bit should be set (as indicated by the AA prefix in the zone file),
 header->ancount = htons(count);
 
 /* If the AA bit should be set (as indicated by the AA prefix in the zone file),

-we are expected to return some records in the authortive section. Bind9: If
-there is data in the answer section, the authoritive section contains the NS
-records, otherwise it contains the SOA record.  Currently we mimic this
-behaviour for the first case (there is some answer record).
+we are expected to return some records in the authoritative section. Bind9: If
+there is data in the answer section, the authoritative section contains the NS
+records, otherwise it contains the SOA record.  Mimic that.

 */
 
 */
 

-if (aa)
-  find_records(f, zone, zone[0] == '.' ? zone+1 : zone, US"NS", 2, &pk, &count, NULL, NULL);
+if (strcmp(qtype, "SOA") != 0 && strcmp(qtype, "NS") != 0)
+  if (count)
+    find_records(f, zone, zone[0] == '.' ? zone+1 : zone, US"NS", 2, &pk, &count, NULL, NULL);
+  else
+    find_records(f, zone, zone[0] == '.' ? zone+1 : zone, US"SOA", 3, &pk, &count, NULL, NULL);

 header->nscount = htons(count - ntohs(header->ancount));
 
 /* There is no need to return any additional records because Exim no longer
 header->nscount = htons(count - ntohs(header->ancount));
 
 /* There is no need to return any additional records because Exim no longer