Docs: add note on DKIM verify disable

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

diff --git a/test/src/fakens.c b/test/src/fakens.c
index 29914cd46e9f3b783e0f4c34596cf25af1308492..3d6f513fc8e878117977418b23755a410d0f8066 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.
 


@@ -75,10 +79,14 @@ a number of seconds (followed by one space).
 #include <errno.h>
 #include <signal.h>
 #include <arpa/nameser.h>
 #include <errno.h>
 #include <signal.h>
 #include <arpa/nameser.h>

+#include <arpa/inet.h>

 #include <sys/types.h>
 #include <sys/time.h>
 #include <dirent.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/time.h>
 #include <dirent.h>
 #include <unistd.h>

+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif

 
 #define FALSE         0
 #define TRUE          1
 
 #define FALSE         0
 #define TRUE          1


@@ -98,6 +106,7 @@ typedef unsigned char uschar;
 #define Ustrlen(s)         (int)strlen(CCS(s))
 #define Ustrncmp(s,t,n)    strncmp(CCS(s),CCS(t),n)
 #define Ustrncpy(s,t,n)    strncpy(CS(s),CCS(t),n)
 #define Ustrlen(s)         (int)strlen(CCS(s))
 #define Ustrncmp(s,t,n)    strncmp(CCS(s),CCS(t),n)
 #define Ustrncpy(s,t,n)    strncpy(CS(s),CCS(t),n)

+#define Ustrtok(s,t)       (uschar*)strtok(CS(s),CCS(t))

 
 typedef struct zoneitem {
   uschar *zone;
 
 typedef struct zoneitem {
   uschar *zone;


@@ -304,8 +313,8 @@ Arguments:
   qtypelen    the length of qtype
   pkptr       points to the output buffer pointer; this is updated
   countptr    points to the record count; this is updated
   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 is updated
-  aa          points to the AA flag indicator; this is updated
+  dnssec_p    points to the AD flag indicator; this is updated
+  aa_p        points to the AA flag indicator; this is 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
 
 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


@@ -313,14 +322,14 @@ Returns:      0 on success, else HOST_NOT_FOUND or NO_DATA or NO_RECOVERY or
 
 static int
 find_records(FILE *f, uschar *zone, uschar *domain, uschar *qtype,
 
 static int
 find_records(FILE *f, uschar *zone, uschar *domain, uschar *qtype,

-  int qtypelen, uschar **pkptr, int *countptr, BOOL * dnssec, BOOL * aa)
+  int qtypelen, uschar **pkptr, int *countptr, BOOL * dnssec_p, BOOL * aa_p)

 {
 int yield = HOST_NOT_FOUND;
 int domainlen = Ustrlen(domain);
 BOOL pass_on_not_found = FALSE;
 tlist *typeptr;
 uschar *pk = *pkptr;
 {
 int yield = HOST_NOT_FOUND;
 int domainlen = Ustrlen(domain);
 BOOL pass_on_not_found = FALSE;
 tlist *typeptr;
 uschar *pk = *pkptr;

-uschar buffer[256];
+uschar buffer[512];

 uschar rrdomain[256];
 uschar RRdomain[256];
 
 uschar rrdomain[256];
 uschar RRdomain[256];
 


@@ -337,9 +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)


@@ -352,6 +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;
 


@@ -377,7 +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;


@@ -433,7 +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_p) *dnssec_p = TRUE;     /* cancelled by first nonsecure rec found */
+    if (aa_p) *aa_p = 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 */
 


@@ -451,11 +468,13 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
   if (delay)
     millisleep(delay);
 
   if (delay)
     millisleep(delay);
 

-  if (dnssec && !rr_sec)
-    *dnssec = FALSE;                    /* cancel AD return */
+  if (dnssec_p && !rr_sec)
+    *dnssec_p = FALSE;                    /* cancel AD return */
+
+  if (aa_p && !rr_aa)
+    *aa_p = 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;


@@ -485,13 +504,13 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
   switch (tvalue)
     {
     case ns_t_soa:
   switch (tvalue)
     {
     case ns_t_soa:

-      p = strtok(p, " ");
-      ep = p + strlen(p);
+      p = Ustrtok(p, " ");
+      ep = p + Ustrlen(p);

       if (ep[-1] != '.') sprintf(CS ep, "%s.", zone);
       pk = packname(p, pk);                     /* primary ns */
       if (ep[-1] != '.') sprintf(CS ep, "%s.", zone);
       pk = packname(p, pk);                     /* primary ns */

-      p = strtok(NULL, " ");
+      p = Ustrtok(NULL, " ");

       pk = packname(p , pk);                    /* responsible mailbox */
       pk = packname(p , pk);                    /* responsible mailbox */

-      *(p += strlen(p)) = ' ';
+      *(p += Ustrlen(p)) = ' ';

       while (isspace(*p)) p++;
       pk = longfield(&p, pk);                   /* serial */
       pk = longfield(&p, pk);                   /* refresh */
       while (isspace(*p)) p++;
       pk = longfield(&p, pk);                   /* serial */
       pk = longfield(&p, pk);                   /* refresh */


@@ -501,35 +520,13 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
       break;
 
     case ns_t_a:
       break;
 
     case ns_t_a:

-      for (i = 0; i < 4; i++)
-        {
-        value = 0;
-        while (isdigit(*p)) value = value*10 + *p++ - '0';
-        *pk++ = value;
-        p++;
-        }
+      inet_pton(AF_INET, CCS p, pk);                /* FIXME: error checking */
+      pk += 4;

       break;
 
       break;
 

-    /* The only occurrence of a double colon is for ::1 */

     case ns_t_aaaa:
     case ns_t_aaaa:

-      if (Ustrcmp(p, "::1") == 0)
-        {
-        memset(pk, 0, 15);
-        pk += 15;
-        *pk++ = 1;
-        }
-      else for (i = 0; i < 8; i++)
-        {
-        value = 0;
-        while (isxdigit(*p))
-          {
-          value = value * 16 + toupper(*p) - (isdigit(*p)? '0' : '7');
-          p++;
-          }
-        *pk++ = (value >> 8) & 255;
-        *pk++ = value & 255;
-        p++;
-        }
+      inet_pton(AF_INET6, CCS p, pk);               /* FIXME: error checking */
+      pk += 16;

       break;
 
     case ns_t_mx:
       break;
 
     case ns_t_mx:


@@ -539,10 +536,15 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
       break;
 
     case ns_t_txt:
       break;
 
     case ns_t_txt:

-      pp = pk++;
-      if (*p == '"') p++;   /* Should always be the case */
-      while (*p != 0 && *p != '"') *pk++ = *p++;
-      *pp = pk - pp - 1;
+      while (*p)
+        {
+        pp = pk++;            /* Skip the size byte in output */
+        if (*p == '"') p++;   /* Should always be the case */
+        while (*p && *p != '"') *pk++ = *p++;
+        *pp = pk - pp - 1;    /* fill in the size */
+        p++;                  /* skip the closing doublequote */
+        while (isspace(*p)) p++; /* next chunk start */
+        }

       break;
 
     case ns_t_tlsa:
       break;
 
     case ns_t_tlsa:


@@ -671,8 +673,8 @@ uschar qtype[12];
 uschar packet[2048 * 32 + 32];
 HEADER *header = (HEADER *)packet;
 uschar *pk = packet;
 uschar packet[2048 * 32 + 32];
 HEADER *header = (HEADER *)packet;
 uschar *pk = packet;

-BOOL dnssec;
-BOOL aa;
+BOOL dnssec = FALSE;
+BOOL aa = FALSE;

 
 signal(SIGALRM, alarmfn);
 
 
 signal(SIGALRM, alarmfn);
 


@@ -686,15 +688,14 @@ if (argc != 4)
 
 (void)sprintf(CS buffer, "%s/dnszones", argv[1]);
 
 
 (void)sprintf(CS buffer, "%s/dnszones", argv[1]);
 

-d = opendir(CCS buffer);
-if (d == NULL)
+if (!(d = opendir(CCS buffer)))

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

-while ((de = readdir(d)) != NULL)
+while ((de = readdir(d)))

   {
   uschar *name = US de->d_name;
   if (Ustrncmp(name, "qualify.", 8) == 0)
   {
   uschar *name = US de->d_name;
   if (Ustrncmp(name, "qualify.", 8) == 0)


@@ -766,22 +767,23 @@ 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 truncation */
+

 /* 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;


@@ -790,14 +792,16 @@ 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