Revert "Docs: Clean for next release"

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

diff --git a/test/src/fakens.c b/test/src/fakens.c
index 9ab7b7e2d551fa7ceb409c1fda0c453e82b88443..0806136cc99a87ba437e6e8c173ade1c2a03d413 100644 (file)
--- a/test/src/fakens.c
+++ b/test/src/fakens.c
@@ -1,5 +1,3 @@
-/* $Cambridge: exim/test/src/fakens.c,v 1.1 2006/02/06 16:24:05 ph10 Exp $ */
-

 /*************************************************
 *       fakens - A Fake Nameserver Program       *
 *************************************************/
 /*************************************************
 *       fakens - A Fake Nameserver Program       *
 *************************************************/


@@ -9,8 +7,8 @@ avoids the need to install special zones in a real nameserver. When Exim is
 running in its (new) test harness, DNS lookups are first passed to this program
 instead of to the real resolver. (With a few exceptions - see the discussion in
 the test suite's README file.) The program is also passed the name of the Exim
 running in its (new) test harness, DNS lookups are first passed to this program
 instead of to the real resolver. (With a few exceptions - see the discussion in
 the test suite's README file.) The program is also passed the name of the Exim

-spool directory; it expects to find its "zone files" in ../dnszones relative to
-that directory. Note that there is little checking in this program. The fake
+spool directory; it expects to find its "zone files" in dnszones relative to
+exim config_main_directory. Note that there is little checking in this program. The fake

 zone files are assumed to be syntactically valid.
 
 The zones that are handled are found by scanning the dnszones directory. A file
 zone files are assumed to be syntactically valid.
 
 The zones that are handled are found by scanning the dnszones directory. A file


@@ -27,7 +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.
 


@@ -50,17 +48,41 @@ line in the zone file contains exactly this:
   PASS ON NOT FOUND
 
 and the domain is not found. It converts the the result to PASS_ON instead of
   PASS ON NOT FOUND
 
 and the domain is not found. It converts the the result to PASS_ON instead of

-HOST_NOT_FOUND. */
+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 "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.
+
+Any DNS record line in a zone file can be prefixed with "TTL=" and
+a number of seconds (followed by one space).
+
+*/

 
 #include <ctype.h>
 #include <stdarg.h>
 #include <stdio.h>
 
 #include <ctype.h>
 #include <stdarg.h>
 #include <stdio.h>

+#include <stdlib.h>

 #include <string.h>
 #include <netdb.h>
 #include <errno.h>
 #include <string.h>
 #include <netdb.h>
 #include <errno.h>

+#include <signal.h>

 #include <arpa/nameser.h>
 #include <arpa/nameser.h>

+#include <arpa/inet.h>

 #include <sys/types.h>
 #include <sys/types.h>

+#include <sys/time.h>

 #include <dirent.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


@@ -80,12 +102,7 @@ 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)

-
-
-typedef struct adomainstr {
-  struct adomainstr *next;
-  uschar name[1];
-} adomainstr;
+#define Ustrtok(s,t)       (uschar*)strtok(CS(s),CCS(t))

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


@@ -97,39 +114,46 @@ typedef struct tlist {
   int value;
 } tlist;
 
   int value;
 } tlist;
 

+#define DEFAULT_TTL 3600U
+

 /* On some (older?) operating systems, the standard ns_t_xxx definitions are
 not available, and only the older T_xxx ones exist in nameser.h. If ns_t_a is
 not defined, assume we are in this state. A really old system might not even
 know about AAAA and SRV at all. */
 
 #ifndef ns_t_a
 /* On some (older?) operating systems, the standard ns_t_xxx definitions are
 not available, and only the older T_xxx ones exist in nameser.h. If ns_t_a is
 not defined, assume we are in this state. A really old system might not even
 know about AAAA and SRV at all. */
 
 #ifndef ns_t_a

-#define ns_t_a      T_A
-#define ns_t_ns     T_NS
-#define ns_t_cname  T_CNAME
-#define ns_t_soa    T_SOA
-#define ns_t_ptr    T_PTR
-#define ns_t_mx     T_MX
-#define ns_t_txt    T_TXT
-#define ns_t_aaaa   T_AAAA
-#define ns_t_srv    T_SRV
-#ifndef T_AAAA
-#define T_AAAA      28
-#endif
-#ifndef T_SRV
-#define T_SRV       33
-#endif
+# define ns_t_a      T_A
+# define ns_t_ns     T_NS
+# define ns_t_cname  T_CNAME
+# define ns_t_soa    T_SOA
+# define ns_t_ptr    T_PTR
+# define ns_t_mx     T_MX
+# define ns_t_txt    T_TXT
+# define ns_t_aaaa   T_AAAA
+# define ns_t_srv    T_SRV
+# define ns_t_tlsa   T_TLSA
+# ifndef T_AAAA
+#  define T_AAAA      28
+# endif
+# ifndef T_SRV
+#  define T_SRV       33
+# endif
+# ifndef T_TLSA
+#  define T_TLSA      52
+# endif

 #endif
 
 static tlist type_list[] = {
   { US"A",       ns_t_a },
   { US"NS",      ns_t_ns },
   { US"CNAME",   ns_t_cname },
 #endif
 
 static tlist type_list[] = {
   { US"A",       ns_t_a },
   { US"NS",      ns_t_ns },
   { US"CNAME",   ns_t_cname },

-/*  { US"SOA",     ns_t_soa },  Not currently in use */
+  { US"SOA",     ns_t_soa },

   { US"PTR",     ns_t_ptr },
   { US"MX",      ns_t_mx },
   { US"TXT",     ns_t_txt },
   { US"AAAA",    ns_t_aaaa },
   { US"SRV",     ns_t_srv },
   { US"PTR",     ns_t_ptr },
   { US"MX",      ns_t_mx },
   { US"TXT",     ns_t_txt },
   { US"AAAA",    ns_t_aaaa },
   { US"SRV",     ns_t_srv },

+  { US"TLSA",    ns_t_tlsa },

   { NULL,        0 }
 };
 
   { NULL,        0 }
 };
 


@@ -155,7 +179,7 @@ uschar *yield;
 char buffer[256];
 va_list ap;
 va_start(ap, format);
 char buffer[256];
 va_list ap;
 va_start(ap, format);

-vsprintf(buffer, format, ap);
+vsprintf(buffer, CS format, ap);

 va_end(ap);
 yield = (uschar *)malloc(Ustrlen(buffer) + 1);
 Ustrcpy(yield, buffer);
 va_end(ap);
 yield = (uschar *)malloc(Ustrlen(buffer) + 1);
 Ustrcpy(yield, buffer);


@@ -193,6 +217,81 @@ while (*name != 0)
 return pk;
 }
 
 return pk;
 }
 

+uschar *
+bytefield(uschar ** pp, uschar * pk)
+{
+unsigned value = 0;
+uschar * p = *pp;
+
+while (isdigit(*p)) value = value*10 + *p++ - '0';
+while (isspace(*p)) p++;
+*pp = p;
+*pk++ = value & 255;
+return pk;
+}
+
+uschar *
+shortfield(uschar ** pp, uschar * pk)
+{
+unsigned value = 0;
+uschar * p = *pp;
+
+while (isdigit(*p)) value = value*10 + *p++ - '0';
+while (isspace(*p)) p++;
+*pp = p;
+*pk++ = (value >> 8) & 255;
+*pk++ = value & 255;
+return pk;
+}
+
+uschar *
+longfield(uschar ** pp, uschar * pk)
+{
+unsigned long value = 0;
+uschar * p = *pp;
+
+while (isdigit(*p)) value = value*10 + *p++ - '0';
+while (isspace(*p)) p++;
+*pp = p;
+*pk++ = (value >> 24) & 255;
+*pk++ = (value >> 16) & 255;
+*pk++ = (value >> 8) & 255;
+*pk++ = value & 255;
+return pk;
+}
+
+
+
+/*************************************************/
+
+static void
+milliwait(struct itimerval *itval)
+{
+sigset_t sigmask;
+sigset_t old_sigmask;
+
+if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
+  return;
+(void)sigemptyset(&sigmask);                           /* Empty mask */
+(void)sigaddset(&sigmask, SIGALRM);                    /* Add SIGALRM */
+(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask);  /* Block SIGALRM */
+(void)setitimer(ITIMER_REAL, itval, NULL);             /* Start timer */
+(void)sigfillset(&sigmask);                            /* All signals */
+(void)sigdelset(&sigmask, SIGALRM);                    /* Remove SIGALRM */
+(void)sigsuspend(&sigmask);                            /* Until SIGALRM */
+(void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL);    /* Restore mask */
+}
+
+static void
+millisleep(int msec)
+{
+struct itimerval itval;
+itval.it_interval.tv_sec = 0;
+itval.it_interval.tv_usec = 0;
+itval.it_value.tv_sec = msec/1000;
+itval.it_value.tv_usec = (msec % 1000) * 1000;
+milliwait(&itval);
+}

 
 
 /*************************************************
 
 
 /*************************************************


@@ -210,7 +309,8 @@ 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

-  adomainptr  points to where to hang additional domains
+  dnssec      points to the AD flag indicator; this is updated
+  aa          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


@@ -218,19 +318,19 @@ 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, adomainstr **adomainptr)
+  int qtypelen, uschar **pkptr, int *countptr, BOOL * dnssec, BOOL * aa)

 {
 int yield = HOST_NOT_FOUND;
 {
 int yield = HOST_NOT_FOUND;

-int zonelen = Ustrlen(zone);

 int domainlen = Ustrlen(domain);
 BOOL pass_on_not_found = FALSE;
 tlist *typeptr;
 uschar *pk = *pkptr;
 uschar buffer[256];
 uschar rrdomain[256];
 int domainlen = Ustrlen(domain);
 BOOL pass_on_not_found = FALSE;
 tlist *typeptr;
 uschar *pk = *pkptr;
 uschar buffer[256];
 uschar rrdomain[256];

+uschar RRdomain[256];

 
 

-/* Decode the required type */

 
 

+/* Decode the required type */

 for (typeptr = type_list; typeptr->name != NULL; typeptr++)
   { if (Ustrcmp(typeptr->name, qtype) == 0) break; }
 if (typeptr->name == NULL)
 for (typeptr = type_list; typeptr->name != NULL; typeptr++)
   { if (Ustrcmp(typeptr->name, qtype) == 0) break; }
 if (typeptr->name == NULL)


@@ -242,6 +342,9 @@ 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)


@@ -249,15 +352,19 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
   uschar *rdlptr;
   uschar *p, *ep, *pp;
   BOOL found_cname = FALSE;
   uschar *rdlptr;
   uschar *p, *ep, *pp;
   BOOL found_cname = FALSE;

-  int i, plen, value;
+  int i, value;

   int tvalue = typeptr->value;
   int qtlen = qtypelen;
   int tvalue = typeptr->value;
   int qtlen = qtypelen;

+  BOOL rr_sec = FALSE;
+  BOOL rr_aa = FALSE;
+  int delay = 0;
+  uint ttl = DEFAULT_TTL;

 
   p = buffer;
   while (isspace(*p)) p++;
   if (*p == 0 || *p == ';') continue;
 
 
   p = buffer;
   while (isspace(*p)) p++;
   if (*p == 0 || *p == ';') continue;
 

-  if (Ustrncmp(p, "PASS ON NOT FOUND", 17) == 0)
+  if (Ustrncmp(p, US"PASS ON NOT FOUND", 17) == 0)

     {
     pass_on_not_found = TRUE;
     continue;
     {
     pass_on_not_found = TRUE;
     continue;


@@ -268,13 +375,54 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
   *ep = 0;
 
   p = buffer;
   *ep = 0;
 
   p = buffer;

-  if (!isspace(*p))
+  for (;;)

     {
     {

-    uschar *pp = rrdomain;
-    while (!isspace(*p)) *pp++ = tolower(*p++);
-    if (pp[-1] != '.') Ustrcpy(pp, zone); else pp[-1] = 0;
+    if (Ustrncmp(p, US"DNSSEC ", 7) == 0)       /* tagged as secure */
+      {
+      rr_sec = TRUE;
+      p += 7;
+      }
+    else if (Ustrncmp(p, US"AA ", 3) == 0)      /* tagged as authoritative */
+      {
+      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';
+      if (isspace(*p)) p++;
+      }
+    else if (Ustrncmp(p, US"TTL=", 4) == 0)     /* TTL for record */
+      {
+      ttl = 0;
+      for (p += 4; *p >= '0' && *p <= '9'; p++) ttl = ttl*10 + *p - '0';
+      if (isspace(*p)) p++;
+      }
+    else
+      break;

     }
 
     }
 

+  if (!isspace(*p))     /* new domain name */
+    {
+    uschar *pp = rrdomain;
+    uschar *PP = RRdomain;
+    while (!isspace(*p))
+      {
+      *pp++ = tolower(*p);
+      *PP++ = *p++;
+      }
+    if (pp[-1] != '.')
+      {
+      Ustrcpy(pp, zone);
+      Ustrcpy(PP, zone);
+      }
+    else
+      {
+      pp[-1] = 0;
+      PP[-1] = 0;
+      }
+    }                   /* else use previous line's domain name */
+

   /* Compare domain names; first check for a wildcard */
 
   if (rrdomain[0] == '*')
   /* Compare domain names; first check for a wildcard */
 
   if (rrdomain[0] == '*')


@@ -305,6 +453,14 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
   else if (Ustrncmp(p, qtype, qtypelen) != 0 || !isspace(p[qtypelen])) continue;
 
   /* Found a relevant record */
   else if (Ustrncmp(p, qtype, qtypelen) != 0 || !isspace(p[qtypelen])) continue;
 
   /* Found a relevant record */

+  if (delay)
+    millisleep(delay);
+
+  if (dnssec && !rr_sec)
+    *dnssec = FALSE;                    /* cancel AD return */
+
+  if (aa && !rr_aa)
+    *aa = FALSE;                        /* cancel AA return */

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


@@ -312,13 +468,19 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
   p += qtlen;
   while (isspace(*p)) p++;
 
   p += qtlen;
   while (isspace(*p)) p++;
 

-  pk = packname(domain, pk);            /* Not rrdomain because of wildcard */
+  /* For a wildcard record, use the search name; otherwise use the record's
+  name in its original case because it might contain upper case letters. */
+
+  pk = packname((rrdomain[0] == '*')? domain : RRdomain, pk);

   *pk++ = (tvalue >> 8) & 255;
   *pk++ = (tvalue) & 255;
   *pk++ = 0;
   *pk++ = 1;     /* class = IN */
 
   *pk++ = (tvalue >> 8) & 255;
   *pk++ = (tvalue) & 255;
   *pk++ = 0;
   *pk++ = 1;     /* class = IN */
 

-  pk += 4;       /* TTL field; don't care */
+  *pk++ = (ttl >>24) & 255;
+  *pk++ = (ttl >>16) & 255;
+  *pk++ = (ttl >> 8) & 255;
+  *pk++ = ttl & 255;

 
   rdlptr = pk;   /* remember rdlength field */
   pk += 2;
 
   rdlptr = pk;   /* remember rdlength field */
   pk += 2;


@@ -327,104 +489,86 @@ while (fgets(CS buffer, sizeof(buffer), f) != NULL)
 
   switch (tvalue)
     {
 
   switch (tvalue)
     {

-    case ns_t_soa:  /* Not currently used */
-    break;
+    case ns_t_soa:
+      p = Ustrtok(p, " ");
+      ep = p + Ustrlen(p);
+      if (ep[-1] != '.') sprintf(CS ep, "%s.", zone);
+      pk = packname(p, pk);                     /* primary ns */
+      p = Ustrtok(NULL, " ");
+      pk = packname(p , pk);                    /* responsible mailbox */
+      *(p += Ustrlen(p)) = ' ';
+      while (isspace(*p)) p++;
+      pk = longfield(&p, pk);                   /* serial */
+      pk = longfield(&p, pk);                   /* refresh */
+      pk = longfield(&p, pk);                   /* retry */
+      pk = longfield(&p, pk);                   /* expire */
+      pk = longfield(&p, pk);                   /* minimum */
+      break;

 
     case ns_t_a:
 
     case ns_t_a:

-    for (i = 0; i < 4; i++)
-      {
-      value = 0;
-      while (isdigit(*p)) value = value*10 + *p++ - '0';
-      *pk++ = value;
-      p++;
-      }
-    break;
+      inet_pton(AF_INET, CCS p, pk);                /* FIXME: error checking */
+      pk += 4;
+      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;
+      inet_pton(AF_INET6, CCS p, pk);               /* FIXME: error checking */
+      pk += 16;
+      break;
+
+    case ns_t_mx:
+      pk = shortfield(&p, pk);
+      if (ep[-1] != '.') sprintf(CS ep, "%s.", zone);
+      pk = packname(p, pk);
+      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;
+      break;
+
+    case ns_t_tlsa:
+      pk = bytefield(&p, pk);   /* usage */
+      pk = bytefield(&p, pk);   /* selector */
+      pk = bytefield(&p, pk);   /* match type */

       while (isxdigit(*p))
       while (isxdigit(*p))

+      {
+      value = toupper(*p) - (isdigit(*p) ? '0' : '7') << 4;
+      if (isxdigit(*++p))

         {
         {

-        value = value * 16 + toupper(*p) - (isdigit(*p)? '0' : '7');
+        value |= toupper(*p) - (isdigit(*p) ? '0' : '7');

         p++;
         }
         p++;
         }

-      *pk++ = (value >> 8) & 255;

       *pk++ = value & 255;
       *pk++ = value & 255;

-      p++;

       }
       }

-    break;

 
 

-    case ns_t_mx:
-    value = 0;
-    while (isdigit(*p)) value = value*10 + *p++ - '0';
-    while (isspace(*p)) p++;
-    *pk++ = (value >> 8) & 255;
-    *pk++ = value & 255;
-    goto PACKNAME;
-
-    case ns_t_txt:
-    pp = pk++;
-    if (*p == '"') p++;   /* Should always be the case */
-    while (*p != 0 && *p != '"') *pk++ = *p++;
-    *pp = pk - pp - 1;
-    break;
+      break;

 
     case ns_t_srv:
 
     case ns_t_srv:

-    for (i = 0; i < 3; i++)
-      {
-      value = 0;
-      while (isdigit(*p)) value = value*10 + *p++ - '0';
-      while (isspace(*p)) p++;
-      *pk++ = (value >> 8) & 255;
-      *pk++ = value & 255;
-      }
+      for (i = 0; i < 3; i++)
+        {
+        value = 0;
+        while (isdigit(*p)) value = value*10 + *p++ - '0';
+        while (isspace(*p)) p++;
+        *pk++ = (value >> 8) & 255;
+        *pk++ = value & 255;
+        }

 
     /* Fall through */
 
     case ns_t_cname:
     case ns_t_ns:
     case ns_t_ptr:
 
     /* Fall through */
 
     case ns_t_cname:
     case ns_t_ns:
     case ns_t_ptr:

-    PACKNAME:
-    if (ep[-1] != '.') sprintf(ep, "%s.", zone);
-    pk = packname(p, pk);
-    plen = Ustrlen(p);
-    if (adomainptr != NULL && plen > zonelen + 2 &&
-        Ustrncmp(p + plen - zonelen - 1, zone, zonelen) == 0)
-      {
-      adomainstr *adomain = (adomainstr *)malloc(sizeof(adomainstr) + plen);
-      *adomainptr = adomain;
-      adomainptr = &(adomain->next);
-      adomain->next = NULL;
-      Ustrncpy(adomain->name, p, plen - 1);
-      adomain->name[plen-1] = 0;
-      }
-    break;
+      if (ep[-1] != '.') sprintf(CS ep, "%s.", zone);
+      pk = packname(p, pk);
+      break;

     }
 
   /* Fill in the length, and we are done with this RR */
 
   rdlptr[0] = ((pk - rdlptr - 2) >> 8) & 255;
   rdlptr[1] = (pk -rdlptr - 2) & 255;
     }
 
   /* Fill in the length, and we are done with this RR */
 
   rdlptr[0] = ((pk - rdlptr - 2) >> 8) & 255;
   rdlptr[1] = (pk -rdlptr - 2) & 255;

-
-  /* If we have just yielded a CNAME, we must change the domain name to the
-  new domain, and re-start the scan from the beginning. */
-
-  if (found_cname)
-    {
-    domain = fcopystring("%s", p);
-    domainlen = Ustrlen(domain);
-    domain[domainlen - 1] = 0;       /* Removed trailing dot */
-    rrdomain[0] = 0;                 /* No previous domain */
-    (void)fseek(f, 0, SEEK_SET);     /* Start again at the beginning */
-    }

   }
 
 *pkptr = pk;
   }
 
 *pkptr = pk;


@@ -432,6 +576,59 @@ return (yield == HOST_NOT_FOUND && pass_on_not_found)? PASS_ON : yield;
 }
 
 
 }
 
 

+static  void
+alarmfn(int sig)
+{
+}
+
+
+/*************************************************
+*     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         *
 
 /*************************************************
 *           Entry point and main program         *


@@ -442,13 +639,11 @@ main(int argc, char **argv)
 {
 FILE *f;
 DIR *d;
 {
 FILE *f;
 DIR *d;

-int dirlen, domlen, qtypelen;
+int domlen, qtypelen;

 int yield, count;
 int i;
 int zonecount = 0;
 int yield, count;
 int i;
 int zonecount = 0;

-tlist *typeptr;

 struct dirent *de;
 struct dirent *de;

-adomainstr *adomain = NULL;

 zoneitem zones[32];
 uschar *qualify = NULL;
 uschar *p, *zone;
 zoneitem zones[32];
 uschar *qualify = NULL;
 uschar *p, *zone;


@@ -456,8 +651,13 @@ uschar *zonefile = NULL;
 uschar domain[256];
 uschar buffer[256];
 uschar qtype[12];
 uschar domain[256];
 uschar buffer[256];
 uschar qtype[12];

-uschar packet[512];
+uschar packet[2048 * 32 + 32];
+HEADER *header = (HEADER *)packet;

 uschar *pk = packet;
 uschar *pk = packet;

+BOOL dnssec;
+BOOL aa;
+
+signal(SIGALRM, alarmfn);

 
 if (argc != 4)
   {
 
 if (argc != 4)
   {


@@ -467,7 +667,7 @@ if (argc != 4)
 
 /* Find the zones */
 
 
 /* Find the zones */
 

-(void)sprintf(buffer, "%s/../dnszones", argv[1]);
+(void)sprintf(CS buffer, "%s/dnszones", argv[1]);

 
 d = opendir(CCS buffer);
 if (d == NULL)
 
 d = opendir(CCS buffer);
 if (d == NULL)


@@ -479,20 +679,20 @@ if (d == NULL)
 
 while ((de = readdir(d)) != NULL)
   {
 
 while ((de = readdir(d)) != NULL)
   {

-  uschar *name = de->d_name;
+  uschar *name = US de->d_name;

   if (Ustrncmp(name, "qualify.", 8) == 0)
     {
   if (Ustrncmp(name, "qualify.", 8) == 0)
     {

-    qualify = fcopystring("%s", name + 7);
+    qualify = fcopystring(US "%s", name + 7);

     continue;
     }
   if (Ustrncmp(name, "db.", 3) != 0) continue;
   if (Ustrncmp(name + 3, "ip4.", 4) == 0)
     continue;
     }
   if (Ustrncmp(name, "db.", 3) != 0) continue;
   if (Ustrncmp(name + 3, "ip4.", 4) == 0)

-    zones[zonecount].zone = fcopystring("%s.in-addr.arpa", name + 6);
+    zones[zonecount].zone = fcopystring(US "%s.in-addr.arpa", name + 6);

   else if (Ustrncmp(name + 3, "ip6.", 4) == 0)
   else if (Ustrncmp(name + 3, "ip6.", 4) == 0)

-    zones[zonecount].zone = fcopystring("%s.ip6.arpa", name + 6);
+    zones[zonecount].zone = fcopystring(US "%s.ip6.arpa", name + 6);

   else
   else

-    zones[zonecount].zone = fcopystring("%s", name + 2);
-  zones[zonecount++].zonefile = fcopystring("%s", name);
+    zones[zonecount].zone = fcopystring(US "%s", name + 2);
+  zones[zonecount++].zonefile = fcopystring(US "%s", name);

   }
 (void)closedir(d);
 
   }
 (void)closedir(d);
 


@@ -502,7 +702,8 @@ Ustrncpy(qtype, argv[3], sizeof(qtype));
 qtypelen = Ustrlen(qtype);
 for (p = qtype; *p != 0; p++) *p = toupper(*p);
 
 qtypelen = Ustrlen(qtype);
 for (p = qtype; *p != 0; p++) *p = toupper(*p);
 

-/* Find the domain, lower case it, check that it is in a zone that we handle,
+/* Find the domain, lower case it, deal with any specials,
+check that it is in a zone that we handle,

 and set up the zone file name. The zone names in the table all start with a
 dot. */
 
 and set up the zone file name. The zone names in the table all start with a
 dot. */
 


@@ -512,6 +713,14 @@ Ustrncpy(domain, argv[2], domlen);
 domain[domlen] = 0;
 for (i = 0; i < domlen; i++) domain[i] = tolower(domain[i]);
 
 domain[domlen] = 0;
 for (i = 0; i < domlen; i++) domain[i] = tolower(domain[i]);
 

+if (Ustrcmp(domain, "manyhome.test.ex") == 0 && Ustrcmp(qtype, "A") == 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 &&
     Ustrcmp(domain, "dontqualify") != 0)
   {
 if (Ustrchr(domain, '.') == NULL && qualify != NULL &&
     Ustrcmp(domain, "dontqualify") != 0)
   {


@@ -538,7 +747,7 @@ if (zonefile == NULL)
   return PASS_ON;
   }
 
   return PASS_ON;
   }
 

-(void)sprintf(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
 
 /* 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


@@ -549,7 +758,7 @@ pk += 12;
 
 /* Open the zone file. */
 
 
 /* Open the zone file. */
 

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

 if (f == NULL)
   {
   fprintf(stderr, "fakens: failed to open %s: %s\n", buffer, strerror(errno));
 if (f == NULL)
   {
   fprintf(stderr, "fakens: failed to open %s: %s\n", buffer, strerror(errno));


@@ -559,23 +768,30 @@ if (f == NULL)
 /* 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;

-yield = find_records(f, zone, domain, qtype, qtypelen, &pk, &count, &adomain);
+yield = find_records(f, zone, domain, qtype, qtypelen, &pk, &count, &dnssec, &aa);

 if (yield == NO_RECOVERY) goto END_OFF;
 if (yield == NO_RECOVERY) goto END_OFF;

+header->ancount = htons(count);

 
 

-packet[6] = (count >> 8) & 255;
-packet[7] = count & 255;
+/* 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 authoritative section. Bind9: If
+there is data in the answer section, the authoritative 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).
+*/

 
 

-/* Search for additional records and add them to the result. */
+if (aa)
+  find_records(f, zone, zone[0] == '.' ? zone+1 : zone, US"NS", 2, &pk, &count, NULL, NULL);
+header->nscount = htons(count - ntohs(header->ancount));

 
 

-count = 0;
-for (; adomain != NULL; adomain = adomain->next)
-  {
-  (void)find_records(f, zone, adomain->name, US"AAAA", 4, &pk, &count, NULL);
-  (void)find_records(f, zone, adomain->name, US"A", 1, &pk, &count, NULL);
-  }
+/* There is no need to return any additional records because Exim no longer
+(from release 4.61) makes any use of them. */
+header->arcount = 0;

 
 

-packet[10] = (count >> 8) & 255;
-packet[11] = count & 255;
+if (dnssec)
+  header->ad = 1;
+
+if (aa)
+  header->aa = 1;

 
 /* Close the zone file, write the result, and return. */
 
 
 /* Close the zone file, write the result, and return. */
 


@@ -585,4 +801,6 @@ END_OFF:
 return yield;
 }
 
 return yield;
 }
 

+/* vi: aw ai sw=2 sts=2 ts=8 et
+*/

 /* End of fakens.c */
 /* End of fakens.c */