tidying
[exim.git] / test / src / fakens.c
CommitLineData
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1/*************************************************
2* fakens - A Fake Nameserver Program *
3*************************************************/
4
5/* This program exists to support the testing of DNS handling code in Exim. It
6avoids the need to install special zones in a real nameserver. When Exim is
7running in its (new) test harness, DNS lookups are first passed to this program
8instead of to the real resolver. (With a few exceptions - see the discussion in
9the test suite's README file.) The program is also passed the name of the Exim
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10spool directory; it expects to find its "zone files" in dnszones relative to
11exim config_main_directory. Note that there is little checking in this program. The fake
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12zone files are assumed to be syntactically valid.
13
14The zones that are handled are found by scanning the dnszones directory. A file
15whose name is of the form db.ip4.x is a zone file for .x.in-addr.arpa; a file
16whose name is of the form db.ip6.x is a zone file for .x.ip6.arpa; a file of
17the form db.anything.else is a zone file for .anything.else. A file of the form
18qualify.x.y specifies the domain that is used to qualify single-component
19names, except for the name "dontqualify".
20
21The arguments to the program are:
22
23 the name of the Exim spool directory
24 the domain name that is being sought
25 the DNS record type that is being sought
26
27The output from the program is written to stdout. It is supposed to be in
28exactly the same format as a traditional namserver response (see RFC 1035) so
29that Exim can process it as normal. At present, no compression is used.
30Error messages are written to stderr.
31
32The return codes from the program are zero for success, and otherwise the
33values that are set in h_errno after a failing call to the normal resolver:
34
35 1 HOST_NOT_FOUND host not found (authoritative)
36 2 TRY_AGAIN server failure
37 3 NO_RECOVERY non-recoverable error
38 4 NO_DATA valid name, no data of requested type
39
40In a real nameserver, TRY_AGAIN is also used for a non-authoritative not found,
41but it is not used for that here. There is also one extra return code:
42
43 5 PASS_ON requests Exim to call res_search()
44
45This is used for zones that fakens does not recognize. It is also used if a
46line in the zone file contains exactly this:
47
48 PASS ON NOT FOUND
49
50and the domain is not found. It converts the the result to PASS_ON instead of
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51HOST_NOT_FOUND.
52
846430d9 53Any DNS record line in a zone file can be prefixed with "DELAY=" and
6aa849d3 54a number of milliseconds (followed by one space).
846430d9 55
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56Any DNS record line in a zone file can be prefixed with "DNSSEC ";
57if all the records found by a lookup are marked
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58as such then the response will have the "AD" bit set.
59
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60Any DNS record line in a zone file can be prefixed with "AA "
61if all the records found by a lookup are marked
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62as such then the response will have the "AA" bit set.
63
64*/
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65
66#include <ctype.h>
67#include <stdarg.h>
68#include <stdio.h>
e265af1f 69#include <stdlib.h>
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70#include <string.h>
71#include <netdb.h>
72#include <errno.h>
9d787f10 73#include <signal.h>
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74#include <arpa/nameser.h>
75#include <sys/types.h>
846430d9 76#include <sys/time.h>
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77#include <dirent.h>
78
79#define FALSE 0
80#define TRUE 1
81#define PASS_ON 5
82
83typedef int BOOL;
84typedef unsigned char uschar;
85
86#define CS (char *)
87#define CCS (const char *)
88#define US (unsigned char *)
89
90#define Ustrcat(s,t) strcat(CS(s),CCS(t))
91#define Ustrchr(s,n) US strchr(CCS(s),n)
92#define Ustrcmp(s,t) strcmp(CCS(s),CCS(t))
93#define Ustrcpy(s,t) strcpy(CS(s),CCS(t))
94#define Ustrlen(s) (int)strlen(CCS(s))
95#define Ustrncmp(s,t,n) strncmp(CCS(s),CCS(t),n)
96#define Ustrncpy(s,t,n) strncpy(CS(s),CCS(t),n)
97
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98typedef struct zoneitem {
99 uschar *zone;
100 uschar *zonefile;
101} zoneitem;
102
103typedef struct tlist {
104 uschar *name;
105 int value;
106} tlist;
107
108/* On some (older?) operating systems, the standard ns_t_xxx definitions are
109not available, and only the older T_xxx ones exist in nameser.h. If ns_t_a is
110not defined, assume we are in this state. A really old system might not even
111know about AAAA and SRV at all. */
112
113#ifndef ns_t_a
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114# define ns_t_a T_A
115# define ns_t_ns T_NS
116# define ns_t_cname T_CNAME
117# define ns_t_soa T_SOA
118# define ns_t_ptr T_PTR
119# define ns_t_mx T_MX
120# define ns_t_txt T_TXT
121# define ns_t_aaaa T_AAAA
122# define ns_t_srv T_SRV
123# define ns_t_tlsa T_TLSA
124# ifndef T_AAAA
125# define T_AAAA 28
126# endif
127# ifndef T_SRV
128# define T_SRV 33
129# endif
130# ifndef T_TLSA
131# define T_TLSA 52
132# endif
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133#endif
134
135static tlist type_list[] = {
136 { US"A", ns_t_a },
137 { US"NS", ns_t_ns },
138 { US"CNAME", ns_t_cname },
d2a2c69b 139 { US"SOA", ns_t_soa },
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140 { US"PTR", ns_t_ptr },
141 { US"MX", ns_t_mx },
142 { US"TXT", ns_t_txt },
143 { US"AAAA", ns_t_aaaa },
144 { US"SRV", ns_t_srv },
b4161d10 145 { US"TLSA", ns_t_tlsa },
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146 { NULL, 0 }
147};
148
149
150
151/*************************************************
152* Get memory and sprintf into it *
153*************************************************/
154
155/* This is used when building a table of zones and their files.
156
157Arguments:
158 format a format string
159 ... arguments
160
161Returns: pointer to formatted string
162*/
163
164static uschar *
165fcopystring(uschar *format, ...)
166{
167uschar *yield;
168char buffer[256];
169va_list ap;
170va_start(ap, format);
e265af1f 171vsprintf(buffer, CS format, ap);
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172va_end(ap);
173yield = (uschar *)malloc(Ustrlen(buffer) + 1);
174Ustrcpy(yield, buffer);
175return yield;
176}
177
178
179/*************************************************
180* Pack name into memory *
181*************************************************/
182
183/* This function packs a domain name into memory according to DNS rules. At
184present, it doesn't do any compression.
185
186Arguments:
187 name the name
188 pk where to put it
189
190Returns: the updated value of pk
191*/
192
193static uschar *
194packname(uschar *name, uschar *pk)
195{
196while (*name != 0)
197 {
198 uschar *p = name;
199 while (*p != 0 && *p != '.') p++;
200 *pk++ = (p - name);
201 memmove(pk, name, p - name);
202 pk += p - name;
203 name = (*p == 0)? p : p + 1;
204 }
205*pk++ = 0;
206return pk;
207}
208
b4161d10 209uschar *
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210bytefield(uschar ** pp, uschar * pk)
211{
212unsigned value = 0;
213uschar * p = *pp;
214
215while (isdigit(*p)) value = value*10 + *p++ - '0';
216while (isspace(*p)) p++;
217*pp = p;
218*pk++ = value & 255;
219return pk;
220}
221
222uschar *
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223shortfield(uschar ** pp, uschar * pk)
224{
225unsigned value = 0;
226uschar * p = *pp;
227
228while (isdigit(*p)) value = value*10 + *p++ - '0';
229while (isspace(*p)) p++;
230*pp = p;
231*pk++ = (value >> 8) & 255;
232*pk++ = value & 255;
233return pk;
234}
235
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236uschar *
237longfield(uschar ** pp, uschar * pk)
238{
239unsigned long value = 0;
240uschar * p = *pp;
241
242while (isdigit(*p)) value = value*10 + *p++ - '0';
243while (isspace(*p)) p++;
244*pp = p;
245*pk++ = (value >> 24) & 255;
246*pk++ = (value >> 16) & 255;
247*pk++ = (value >> 8) & 255;
248*pk++ = value & 255;
249return pk;
250}
251
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252
253
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254/*************************************************/
255
256static void
257milliwait(struct itimerval *itval)
258{
259sigset_t sigmask;
260sigset_t old_sigmask;
261
262if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
263 return;
264(void)sigemptyset(&sigmask); /* Empty mask */
265(void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
266(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
267(void)setitimer(ITIMER_REAL, itval, NULL); /* Start timer */
268(void)sigfillset(&sigmask); /* All signals */
269(void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
270(void)sigsuspend(&sigmask); /* Until SIGALRM */
271(void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
272}
273
274static void
275millisleep(int msec)
276{
277struct itimerval itval;
278itval.it_interval.tv_sec = 0;
279itval.it_interval.tv_usec = 0;
280itval.it_value.tv_sec = msec/1000;
281itval.it_value.tv_usec = (msec % 1000) * 1000;
282milliwait(&itval);
283}
284
285
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286/*************************************************
287* Scan file for RRs *
288*************************************************/
289
290/* This function scans an open "zone file" for appropriate records, and adds
291any that are found to the output buffer.
292
293Arguments:
294 f the input FILE
295 zone the current zone name
296 domain the domain we are looking for
297 qtype the type of RR we want
298 qtypelen the length of qtype
299 pkptr points to the output buffer pointer; this is updated
300 countptr points to the record count; this is updated
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301 dnssec points to the AD flag indicator; this updated
302 aa points to the AA flag indicator; this updated
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303
304Returns: 0 on success, else HOST_NOT_FOUND or NO_DATA or NO_RECOVERY or
305 PASS_ON - the latter if a "PASS ON NOT FOUND" line is seen
306*/
307
308static int
309find_records(FILE *f, uschar *zone, uschar *domain, uschar *qtype,
589b3179 310 int qtypelen, uschar **pkptr, int *countptr, BOOL * dnssec, BOOL * aa)
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311{
312int yield = HOST_NOT_FOUND;
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313int domainlen = Ustrlen(domain);
314BOOL pass_on_not_found = FALSE;
315tlist *typeptr;
316uschar *pk = *pkptr;
317uschar buffer[256];
318uschar rrdomain[256];
75e0e026 319uschar RRdomain[256];
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320
321/* Decode the required type */
322
323for (typeptr = type_list; typeptr->name != NULL; typeptr++)
324 { if (Ustrcmp(typeptr->name, qtype) == 0) break; }
325if (typeptr->name == NULL)
326 {
327 fprintf(stderr, "fakens: unknown record type %s\n", qtype);
328 return NO_RECOVERY;
329 }
330
331rrdomain[0] = 0; /* No previous domain */
332(void)fseek(f, 0, SEEK_SET); /* Start again at the beginning */
333
b4161d10 334*dnssec = TRUE; /* cancelled by first nonsecure rec found */
589b3179 335*aa = TRUE; /* cancelled by first non-authoritive record */
4d4c2a9b 336
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337/* Scan for RRs */
338
339while (fgets(CS buffer, sizeof(buffer), f) != NULL)
340 {
341 uschar *rdlptr;
342 uschar *p, *ep, *pp;
343 BOOL found_cname = FALSE;
d2a2c69b 344 int i, value;
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345 int tvalue = typeptr->value;
346 int qtlen = qtypelen;
4d4c2a9b 347 BOOL rr_sec = FALSE;
589b3179 348 BOOL rr_aa = FALSE;
846430d9 349 int delay = 0;
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350
351 p = buffer;
352 while (isspace(*p)) p++;
353 if (*p == 0 || *p == ';') continue;
354
4d4c2a9b 355 if (Ustrncmp(p, US"PASS ON NOT FOUND", 17) == 0)
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356 {
357 pass_on_not_found = TRUE;
358 continue;
359 }
360
361 ep = buffer + Ustrlen(buffer);
362 while (isspace(ep[-1])) ep--;
363 *ep = 0;
364
365 p = buffer;
846430d9 366 for (;;)
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367 {
368 if (Ustrncmp(p, US"DNSSEC ", 7) == 0) /* tagged as secure */
369 {
370 rr_sec = TRUE;
371 p += 7;
372 }
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373 else if (Ustrncmp(p, US"AA ", 3) == 0) /* tagged as authoritive */
374 {
375 rr_aa = TRUE;
376 p += 3;
377 }
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378 else if (Ustrncmp(p, US"DELAY=", 6) == 0) /* delay before response */
379 {
380 for (p += 6; *p >= '0' && *p <= '9'; p++) delay = delay*10 + *p - '0';
6aa849d3 381 if (isspace(*p)) p++;
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382 }
383 else
384 break;
385 }
4d4c2a9b 386
6aa849d3 387 if (!isspace(*p)) /* new domain name */
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388 {
389 uschar *pp = rrdomain;
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390 uschar *PP = RRdomain;
391 while (!isspace(*p))
392 {
393 *pp++ = tolower(*p);
394 *PP++ = *p++;
395 }
396 if (pp[-1] != '.')
397 {
398 Ustrcpy(pp, zone);
399 Ustrcpy(PP, zone);
400 }
401 else
402 {
403 pp[-1] = 0;
404 PP[-1] = 0;
405 }
6aa849d3 406 } /* else use previous line's domain name */
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407
408 /* Compare domain names; first check for a wildcard */
409
410 if (rrdomain[0] == '*')
411 {
412 int restlen = Ustrlen(rrdomain) - 1;
413 if (domainlen > restlen &&
414 Ustrcmp(domain + domainlen - restlen, rrdomain + 1) != 0) continue;
415 }
416
417 /* Not a wildcard RR */
418
419 else if (Ustrcmp(domain, rrdomain) != 0) continue;
420
421 /* The domain matches */
422
423 if (yield == HOST_NOT_FOUND) yield = NO_DATA;
424
425 /* Compare RR types; a CNAME record is always returned */
426
427 while (isspace(*p)) p++;
428
429 if (Ustrncmp(p, "CNAME", 5) == 0)
430 {
431 tvalue = ns_t_cname;
432 qtlen = 5;
433 found_cname = TRUE;
434 }
435 else if (Ustrncmp(p, qtype, qtypelen) != 0 || !isspace(p[qtypelen])) continue;
436
437 /* Found a relevant record */
438
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439 if (delay)
440 millisleep(delay);
441
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442 if (!rr_sec)
443 *dnssec = FALSE; /* cancel AD return */
444
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445 if (!rr_aa)
446 *aa = FALSE; /* cancel AA return */
447
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448 yield = 0;
449 *countptr = *countptr + 1;
450
451 p += qtlen;
452 while (isspace(*p)) p++;
453
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454 /* For a wildcard record, use the search name; otherwise use the record's
455 name in its original case because it might contain upper case letters. */
456
457 pk = packname((rrdomain[0] == '*')? domain : RRdomain, pk);
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458 *pk++ = (tvalue >> 8) & 255;
459 *pk++ = (tvalue) & 255;
460 *pk++ = 0;
461 *pk++ = 1; /* class = IN */
462
463 pk += 4; /* TTL field; don't care */
464
465 rdlptr = pk; /* remember rdlength field */
466 pk += 2;
467
468 /* The rest of the data depends on the type */
469
470 switch (tvalue)
471 {
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472 case ns_t_soa:
473 p = strtok(p, " ");
474 ep = p + strlen(p);
475 if (ep[-1] != '.') sprintf(CS ep, "%s.", zone);
476 pk = packname(p, pk); /* primary ns */
477 p = strtok(NULL, " ");
478 pk = packname(p , pk); /* responsible mailbox */
479 *(p += strlen(p)) = ' ';
480 while (isspace(*p)) p++;
481 pk = longfield(&p, pk); /* serial */
482 pk = longfield(&p, pk); /* refresh */
483 pk = longfield(&p, pk); /* retry */
484 pk = longfield(&p, pk); /* expire */
485 pk = longfield(&p, pk); /* minimum */
486 break;
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487
488 case ns_t_a:
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489 for (i = 0; i < 4; i++)
490 {
491 value = 0;
492 while (isdigit(*p)) value = value*10 + *p++ - '0';
493 *pk++ = value;
494 p++;
495 }
496 break;
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497
498 /* The only occurrence of a double colon is for ::1 */
499 case ns_t_aaaa:
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500 if (Ustrcmp(p, "::1") == 0)
501 {
502 memset(pk, 0, 15);
503 pk += 15;
504 *pk++ = 1;
505 }
506 else for (i = 0; i < 8; i++)
507 {
508 value = 0;
509 while (isxdigit(*p))
510 {
511 value = value * 16 + toupper(*p) - (isdigit(*p)? '0' : '7');
512 p++;
513 }
514 *pk++ = (value >> 8) & 255;
515 *pk++ = value & 255;
516 p++;
517 }
518 break;
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519
520 case ns_t_mx:
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521 pk = shortfield(&p, pk);
522 if (ep[-1] != '.') sprintf(CS ep, "%s.", zone);
523 pk = packname(p, pk);
524 break;
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525
526 case ns_t_txt:
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527 pp = pk++;
528 if (*p == '"') p++; /* Should always be the case */
529 while (*p != 0 && *p != '"') *pk++ = *p++;
530 *pp = pk - pp - 1;
531 break;
c55a77db 532
b4161d10 533 case ns_t_tlsa:
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534 pk = bytefield(&p, pk); /* usage */
535 pk = bytefield(&p, pk); /* selector */
536 pk = bytefield(&p, pk); /* match type */
537 while (isxdigit(*p))
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538 {
539 value = toupper(*p) - (isdigit(*p) ? '0' : '7') << 4;
540 if (isxdigit(*++p))
541 {
542 value |= toupper(*p) - (isdigit(*p) ? '0' : '7');
543 p++;
544 }
545 *pk++ = value & 255;
546 }
547
d2a2c69b 548 break;
b4161d10 549
c55a77db 550 case ns_t_srv:
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551 for (i = 0; i < 3; i++)
552 {
553 value = 0;
554 while (isdigit(*p)) value = value*10 + *p++ - '0';
555 while (isspace(*p)) p++;
556 *pk++ = (value >> 8) & 255;
557 *pk++ = value & 255;
558 }
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559
560 /* Fall through */
561
562 case ns_t_cname:
563 case ns_t_ns:
564 case ns_t_ptr:
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565 if (ep[-1] != '.') sprintf(CS ep, "%s.", zone);
566 pk = packname(p, pk);
567 break;
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568 }
569
570 /* Fill in the length, and we are done with this RR */
571
572 rdlptr[0] = ((pk - rdlptr - 2) >> 8) & 255;
573 rdlptr[1] = (pk -rdlptr - 2) & 255;
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574 }
575
576*pkptr = pk;
577return (yield == HOST_NOT_FOUND && pass_on_not_found)? PASS_ON : yield;
578}
579
580
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581static void
582alarmfn(int sig)
583{
584}
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585
586/*************************************************
587* Entry point and main program *
588*************************************************/
589
590int
591main(int argc, char **argv)
592{
593FILE *f;
594DIR *d;
75e0e026 595int domlen, qtypelen;
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596int yield, count;
597int i;
598int zonecount = 0;
c55a77db 599struct dirent *de;
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600zoneitem zones[32];
601uschar *qualify = NULL;
602uschar *p, *zone;
603uschar *zonefile = NULL;
604uschar domain[256];
605uschar buffer[256];
606uschar qtype[12];
1fb7660f 607uschar packet[2048 * 32 + 32];
c55a77db 608uschar *pk = packet;
4d4c2a9b 609BOOL dnssec;
589b3179 610BOOL aa;
c55a77db 611
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612signal(SIGALRM, alarmfn);
613
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614if (argc != 4)
615 {
616 fprintf(stderr, "fakens: expected 3 arguments, received %d\n", argc-1);
617 return NO_RECOVERY;
618 }
619
620/* Find the zones */
621
5f3d0983 622(void)sprintf(CS buffer, "%s/dnszones", argv[1]);
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623
624d = opendir(CCS buffer);
625if (d == NULL)
626 {
627 fprintf(stderr, "fakens: failed to opendir %s: %s\n", buffer,
628 strerror(errno));
629 return NO_RECOVERY;
630 }
631
632while ((de = readdir(d)) != NULL)
633 {
e265af1f 634 uschar *name = US de->d_name;
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635 if (Ustrncmp(name, "qualify.", 8) == 0)
636 {
e265af1f 637 qualify = fcopystring(US "%s", name + 7);
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638 continue;
639 }
640 if (Ustrncmp(name, "db.", 3) != 0) continue;
641 if (Ustrncmp(name + 3, "ip4.", 4) == 0)
e265af1f 642 zones[zonecount].zone = fcopystring(US "%s.in-addr.arpa", name + 6);
c55a77db 643 else if (Ustrncmp(name + 3, "ip6.", 4) == 0)
e265af1f 644 zones[zonecount].zone = fcopystring(US "%s.ip6.arpa", name + 6);
c55a77db 645 else
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646 zones[zonecount].zone = fcopystring(US "%s", name + 2);
647 zones[zonecount++].zonefile = fcopystring(US "%s", name);
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648 }
649(void)closedir(d);
650
651/* Get the RR type and upper case it, and check that we recognize it. */
652
653Ustrncpy(qtype, argv[3], sizeof(qtype));
654qtypelen = Ustrlen(qtype);
655for (p = qtype; *p != 0; p++) *p = toupper(*p);
656
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657/* Find the domain, lower case it, deal with any specials,
658check that it is in a zone that we handle,
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659and set up the zone file name. The zone names in the table all start with a
660dot. */
661
662domlen = Ustrlen(argv[2]);
663if (argv[2][domlen-1] == '.') domlen--;
664Ustrncpy(domain, argv[2], domlen);
665domain[domlen] = 0;
666for (i = 0; i < domlen; i++) domain[i] = tolower(domain[i]);
667
1fb7660f
JH
668if (Ustrcmp(domain, "manyhome.test.ex") == 0 && Ustrcmp(qtype, "A") == 0)
669 {
670 uschar *pk = packet + 12;
671 uschar *rdlptr;
672 int i, j;
673
674 memset(packet, 0, 12);
675
676 for (i = 104; i <= 111; i++) for (j = 0; j <= 255; j++)
677 {
678 pk = packname(domain, pk);
679 *pk++ = (ns_t_a >> 8) & 255;
680 *pk++ = (ns_t_a) & 255;
681 *pk++ = 0;
682 *pk++ = 1; /* class = IN */
683 pk += 4; /* TTL field; don't care */
684 rdlptr = pk; /* remember rdlength field */
685 pk += 2;
686
687 *pk++ = 10; *pk++ = 250; *pk++ = i; *pk++ = j;
688
689 rdlptr[0] = ((pk - rdlptr - 2) >> 8) & 255;
690 rdlptr[1] = (pk - rdlptr - 2) & 255;
691 }
692
693 packet[6] = (2048 >> 8) & 255;
694 packet[7] = 2048 & 255;
695 packet[10] = 0;
696 packet[11] = 0;
697
698 (void)fwrite(packet, 1, pk - packet, stdout);
699 return 0;
700 }
701
702
c55a77db
PH
703if (Ustrchr(domain, '.') == NULL && qualify != NULL &&
704 Ustrcmp(domain, "dontqualify") != 0)
705 {
706 Ustrcat(domain, qualify);
707 domlen += Ustrlen(qualify);
708 }
709
710for (i = 0; i < zonecount; i++)
711 {
712 int zlen;
713 zone = zones[i].zone;
714 zlen = Ustrlen(zone);
715 if (Ustrcmp(domain, zone+1) == 0 || (domlen >= zlen &&
716 Ustrcmp(domain + domlen - zlen, zone) == 0))
717 {
718 zonefile = zones[i].zonefile;
719 break;
720 }
721 }
722
723if (zonefile == NULL)
724 {
725 fprintf(stderr, "fakens: query not in faked zone: domain is: %s\n", domain);
726 return PASS_ON;
727 }
728
5f3d0983 729(void)sprintf(CS buffer, "%s/dnszones/%s", argv[1], zonefile);
c55a77db
PH
730
731/* Initialize the start of the response packet. We don't have to fake up
732everything, because we know that Exim will look only at the answer and
733additional section parts. */
734
735memset(packet, 0, 12);
736pk += 12;
737
738/* Open the zone file. */
739
42ec9880 740f = fopen(CS buffer, "r");
c55a77db
PH
741if (f == NULL)
742 {
743 fprintf(stderr, "fakens: failed to open %s: %s\n", buffer, strerror(errno));
744 return NO_RECOVERY;
745 }
746
747/* Find the records we want, and add them to the result. */
748
749count = 0;
589b3179 750yield = find_records(f, zone, domain, qtype, qtypelen, &pk, &count, &dnssec, &aa);
c55a77db
PH
751if (yield == NO_RECOVERY) goto END_OFF;
752
753packet[6] = (count >> 8) & 255;
754packet[7] = count & 255;
755
75e0e026
PH
756/* There is no need to return any additional records because Exim no longer
757(from release 4.61) makes any use of them. */
c55a77db 758
75e0e026
PH
759packet[10] = 0;
760packet[11] = 0;
c55a77db 761
4d4c2a9b
JH
762if (dnssec)
763 ((HEADER *)packet)->ad = 1;
764
589b3179
HSHR
765if (aa)
766 ((HEADER *)packet)->aa = 1;
767
c55a77db
PH
768/* Close the zone file, write the result, and return. */
769
770END_OFF:
771(void)fclose(f);
772(void)fwrite(packet, 1, pk - packet, stdout);
773return yield;
774}
775
589b3179 776/* vi: aw ai sw=2 sts=2 ts=8 et
4d4c2a9b 777*/
c55a77db 778/* End of fakens.c */