Bug Summary

File:build-scan/../src/resolve/resolved-dns-rr.c
Warning:line 1035, column 32
Potential leak of memory pointed to by 'alg'

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name resolved-dns-rr.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -menable-no-infs -menable-no-nans -menable-unsafe-fp-math -fno-signed-zeros -mreassociate -freciprocal-math -fdenormal-fp-math=preserve-sign,preserve-sign -ffp-contract=fast -fno-rounding-math -ffast-math -ffinite-math-only -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib64/clang/12.0.0 -include config.h -I src/resolve/libsystemd-resolve-core.a.p -I src/resolve -I ../src/resolve -I src/basic -I ../src/basic -I src/shared -I ../src/shared -I src/systemd -I ../src/systemd -I src/journal -I ../src/journal -I src/journal-remote -I ../src/journal-remote -I src/nspawn -I ../src/nspawn -I src/timesync -I ../src/timesync -I ../src/time-wait-sync -I src/login -I ../src/login -I src/udev -I ../src/udev -I src/libudev -I ../src/libudev -I src/core -I ../src/core -I ../src/libsystemd/sd-bus -I ../src/libsystemd/sd-device -I ../src/libsystemd/sd-hwdb -I ../src/libsystemd/sd-id128 -I ../src/libsystemd/sd-netlink -I ../src/libsystemd/sd-network -I src/libsystemd-network -I ../src/libsystemd-network -I . -I .. -D _FILE_OFFSET_BITS=64 -internal-isystem /usr/local/include -internal-isystem /usr/lib64/clang/12.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -Wwrite-strings -Wno-unused-parameter -Wno-missing-field-initializers -Wno-unused-result -Wno-format-signedness -Wno-error=nonnull -std=gnu99 -fconst-strings -fdebug-compilation-dir /home/mrc0mmand/repos/@redhat-plumbers/systemd-rhel8/build-scan -ferror-limit 19 -fvisibility hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -analyzer-output=html -faddrsig -o /tmp/scan-build-2021-07-16-221226-1465241-1 -x c ../src/resolve/resolved-dns-rr.c
1/* SPDX-License-Identifier: LGPL-2.1+ */
2
3#include <math.h>
4
5#include "alloc-util.h"
6#include "dns-domain.h"
7#include "dns-type.h"
8#include "escape.h"
9#include "hexdecoct.h"
10#include "resolved-dns-dnssec.h"
11#include "resolved-dns-packet.h"
12#include "resolved-dns-rr.h"
13#include "string-table.h"
14#include "string-util.h"
15#include "strv.h"
16#include "terminal-util.h"
17
18DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name) {
19 DnsResourceKey *k;
20 size_t l;
21
22 assert(name)do { if ((__builtin_expect(!!(!(name)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("name"), "../src/resolve/resolved-dns-rr.c"
, 22, __PRETTY_FUNCTION__); } while (0);
23
24 l = strlen(name);
25 k = malloc0(sizeof(DnsResourceKey) + l + 1)(calloc(1, (sizeof(DnsResourceKey) + l + 1)));
26 if (!k)
27 return NULL((void*)0);
28
29 k->n_ref = 1;
30 k->class = class;
31 k->type = type;
32
33 strcpy((char*) k + sizeof(DnsResourceKey), name);
34
35 return k;
36}
37
38DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) {
39 int r;
40
41 assert(key)do { if ((__builtin_expect(!!(!(key)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("key"), "../src/resolve/resolved-dns-rr.c"
, 41, __PRETTY_FUNCTION__); } while (0);
42 assert(cname)do { if ((__builtin_expect(!!(!(cname)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("cname"), "../src/resolve/resolved-dns-rr.c"
, 42, __PRETTY_FUNCTION__); } while (0);
43
44 assert(IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME))do { if ((__builtin_expect(!!(!(({ _Bool _found = 0; static __attribute__
((unused)) char _static_assert__macros_need_to_be_extended[20
- sizeof((int[]){DNS_TYPE_CNAME, DNS_TYPE_DNAME})/sizeof(int
)]; switch(cname->key->type) { case DNS_TYPE_CNAME: case
DNS_TYPE_DNAME: _found = 1; break; default: break; } _found;
}))),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("IN_SET(cname->key->type, DNS_TYPE_CNAME, DNS_TYPE_DNAME)"
), "../src/resolve/resolved-dns-rr.c", 44, __PRETTY_FUNCTION__
); } while (0);
45
46 if (cname->key->type == DNS_TYPE_CNAME)
47 return dns_resource_key_new(key->class, key->type, cname->cname.name);
48 else {
49 DnsResourceKey *k;
50 char *destination = NULL((void*)0);
51
52 r = dns_name_change_suffix(dns_resource_key_name(key), dns_resource_key_name(cname->key), cname->dname.name, &destination);
53 if (r < 0)
54 return NULL((void*)0);
55 if (r == 0)
56 return dns_resource_key_ref((DnsResourceKey*) key);
57
58 k = dns_resource_key_new_consume(key->class, key->type, destination);
59 if (!k)
60 return mfree(destination);
61
62 return k;
63 }
64}
65
66int dns_resource_key_new_append_suffix(DnsResourceKey **ret, DnsResourceKey *key, char *name) {
67 DnsResourceKey *new_key;
68 char *joined;
69 int r;
70
71 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/resolve/resolved-dns-rr.c"
, 71, __PRETTY_FUNCTION__); } while (0);
72 assert(key)do { if ((__builtin_expect(!!(!(key)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("key"), "../src/resolve/resolved-dns-rr.c"
, 72, __PRETTY_FUNCTION__); } while (0);
73 assert(name)do { if ((__builtin_expect(!!(!(name)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("name"), "../src/resolve/resolved-dns-rr.c"
, 73, __PRETTY_FUNCTION__); } while (0);
74
75 if (dns_name_is_root(name)) {
76 *ret = dns_resource_key_ref(key);
77 return 0;
78 }
79
80 r = dns_name_concat(dns_resource_key_name(key), name, &joined);
81 if (r < 0)
82 return r;
83
84 new_key = dns_resource_key_new_consume(key->class, key->type, joined);
85 if (!new_key) {
86 free(joined);
87 return -ENOMEM12;
88 }
89
90 *ret = new_key;
91 return 0;
92}
93
94DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {
95 DnsResourceKey *k;
96
97 assert(name)do { if ((__builtin_expect(!!(!(name)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("name"), "../src/resolve/resolved-dns-rr.c"
, 97, __PRETTY_FUNCTION__); } while (0);
98
99 k = new0(DnsResourceKey, 1)((DnsResourceKey*) calloc((1), sizeof(DnsResourceKey)));
100 if (!k)
101 return NULL((void*)0);
102
103 k->n_ref = 1;
104 k->class = class;
105 k->type = type;
106 k->_name = name;
107
108 return k;
109}
110
111DnsResourceKey* dns_resource_key_ref(DnsResourceKey *k) {
112
113 if (!k)
114 return NULL((void*)0);
115
116 /* Static/const keys created with DNS_RESOURCE_KEY_CONST will
117 * set this to -1, they should not be reffed/unreffed */
118 assert(k->n_ref != (unsigned) -1)do { if ((__builtin_expect(!!(!(k->n_ref != (unsigned) -1)
),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("k->n_ref != (unsigned) -1"
), "../src/resolve/resolved-dns-rr.c", 118, __PRETTY_FUNCTION__
); } while (0);
119
120 assert(k->n_ref > 0)do { if ((__builtin_expect(!!(!(k->n_ref > 0)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("k->n_ref > 0"), "../src/resolve/resolved-dns-rr.c"
, 120, __PRETTY_FUNCTION__); } while (0);
121 k->n_ref++;
122
123 return k;
124}
125
126DnsResourceKey* dns_resource_key_unref(DnsResourceKey *k) {
127 if (!k)
128 return NULL((void*)0);
129
130 assert(k->n_ref != (unsigned) -1)do { if ((__builtin_expect(!!(!(k->n_ref != (unsigned) -1)
),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("k->n_ref != (unsigned) -1"
), "../src/resolve/resolved-dns-rr.c", 130, __PRETTY_FUNCTION__
); } while (0);
131 assert(k->n_ref > 0)do { if ((__builtin_expect(!!(!(k->n_ref > 0)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("k->n_ref > 0"), "../src/resolve/resolved-dns-rr.c"
, 131, __PRETTY_FUNCTION__); } while (0);
132
133 if (k->n_ref == 1) {
134 free(k->_name);
135 free(k);
136 } else
137 k->n_ref--;
138
139 return NULL((void*)0);
140}
141
142const char* dns_resource_key_name(const DnsResourceKey *key) {
143 const char *name;
144
145 if (!key)
146 return NULL((void*)0);
147
148 if (key->_name)
149 name = key->_name;
150 else
151 name = (char*) key + sizeof(DnsResourceKey);
152
153 if (dns_name_is_root(name))
154 return ".";
155 else
156 return name;
157}
158
159bool_Bool dns_resource_key_is_address(const DnsResourceKey *key) {
160 assert(key)do { if ((__builtin_expect(!!(!(key)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("key"), "../src/resolve/resolved-dns-rr.c"
, 160, __PRETTY_FUNCTION__); } while (0);
161
162 /* Check if this is an A or AAAA resource key */
163
164 return key->class == DNS_CLASS_IN && IN_SET(key->type, DNS_TYPE_A, DNS_TYPE_AAAA)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended
[20 - sizeof((int[]){DNS_TYPE_A, DNS_TYPE_AAAA})/sizeof(int)]
; switch(key->type) { case DNS_TYPE_A: case DNS_TYPE_AAAA:
_found = 1; break; default: break; } _found; });
165}
166
167bool_Bool dns_resource_key_is_dnssd_ptr(const DnsResourceKey *key) {
168 assert(key)do { if ((__builtin_expect(!!(!(key)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("key"), "../src/resolve/resolved-dns-rr.c"
, 168, __PRETTY_FUNCTION__); } while (0);
169
170 /* Check if this is a PTR resource key used in
171 Service Instance Enumeration as described in RFC6763 p4.1. */
172
173 if (key->type != DNS_TYPE_PTR)
174 return false0;
175
176 return dns_name_endswith(dns_resource_key_name(key), "_tcp.local") ||
177 dns_name_endswith(dns_resource_key_name(key), "_udp.local");
178}
179
180int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) {
181 int r;
182
183 if (a == b)
184 return 1;
185
186 r = dns_name_equal(dns_resource_key_name(a), dns_resource_key_name(b));
187 if (r <= 0)
188 return r;
189
190 if (a->class != b->class)
191 return 0;
192
193 if (a->type != b->type)
194 return 0;
195
196 return 1;
197}
198
199int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain) {
200 int r;
201
202 assert(key)do { if ((__builtin_expect(!!(!(key)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("key"), "../src/resolve/resolved-dns-rr.c"
, 202, __PRETTY_FUNCTION__); } while (0);
203 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 203, __PRETTY_FUNCTION__); } while (0);
204
205 if (key == rr->key)
206 return 1;
207
208 /* Checks if an rr matches the specified key. If a search
209 * domain is specified, it will also be checked if the key
210 * with the search domain suffixed might match the RR. */
211
212 if (rr->key->class != key->class && key->class != DNS_CLASS_ANY)
213 return 0;
214
215 if (rr->key->type != key->type && key->type != DNS_TYPE_ANY)
216 return 0;
217
218 r = dns_name_equal(dns_resource_key_name(rr->key), dns_resource_key_name(key));
219 if (r != 0)
220 return r;
221
222 if (search_domain) {
223 _cleanup_free___attribute__((cleanup(freep))) char *joined = NULL((void*)0);
224
225 r = dns_name_concat(dns_resource_key_name(key), search_domain, &joined);
226 if (r < 0)
227 return r;
228
229 return dns_name_equal(dns_resource_key_name(rr->key), joined);
230 }
231
232 return 0;
233}
234
235int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain) {
236 int r;
237
238 assert(key)do { if ((__builtin_expect(!!(!(key)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("key"), "../src/resolve/resolved-dns-rr.c"
, 238, __PRETTY_FUNCTION__); } while (0);
239 assert(cname)do { if ((__builtin_expect(!!(!(cname)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("cname"), "../src/resolve/resolved-dns-rr.c"
, 239, __PRETTY_FUNCTION__); } while (0);
240
241 if (cname->class != key->class && key->class != DNS_CLASS_ANY)
242 return 0;
243
244 if (cname->type == DNS_TYPE_CNAME)
245 r = dns_name_equal(dns_resource_key_name(key), dns_resource_key_name(cname));
246 else if (cname->type == DNS_TYPE_DNAME)
247 r = dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(cname));
248 else
249 return 0;
250
251 if (r != 0)
252 return r;
253
254 if (search_domain) {
255 _cleanup_free___attribute__((cleanup(freep))) char *joined = NULL((void*)0);
256
257 r = dns_name_concat(dns_resource_key_name(key), search_domain, &joined);
258 if (r < 0)
259 return r;
260
261 if (cname->type == DNS_TYPE_CNAME)
262 return dns_name_equal(joined, dns_resource_key_name(cname));
263 else if (cname->type == DNS_TYPE_DNAME)
264 return dns_name_endswith(joined, dns_resource_key_name(cname));
265 }
266
267 return 0;
268}
269
270int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa) {
271 assert(soa)do { if ((__builtin_expect(!!(!(soa)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("soa"), "../src/resolve/resolved-dns-rr.c"
, 271, __PRETTY_FUNCTION__); } while (0);
272 assert(key)do { if ((__builtin_expect(!!(!(key)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("key"), "../src/resolve/resolved-dns-rr.c"
, 272, __PRETTY_FUNCTION__); } while (0);
273
274 /* Checks whether 'soa' is a SOA record for the specified key. */
275
276 if (soa->class != key->class)
277 return 0;
278
279 if (soa->type != DNS_TYPE_SOA)
280 return 0;
281
282 return dns_name_endswith(dns_resource_key_name(key), dns_resource_key_name(soa));
283}
284
285static void dns_resource_key_hash_func(const void *i, struct siphash *state) {
286 const DnsResourceKey *k = i;
287
288 assert(k)do { if ((__builtin_expect(!!(!(k)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("k"), "../src/resolve/resolved-dns-rr.c"
, 288, __PRETTY_FUNCTION__); } while (0);
289
290 dns_name_hash_func(dns_resource_key_name(k), state);
291 siphash24_compress(&k->class, sizeof(k->class), state);
292 siphash24_compress(&k->type, sizeof(k->type), state);
293}
294
295static int dns_resource_key_compare_func(const void *a, const void *b) {
296 const DnsResourceKey *x = a, *y = b;
297 int ret;
298
299 ret = dns_name_compare_func(dns_resource_key_name(x), dns_resource_key_name(y));
300 if (ret != 0)
301 return ret;
302
303 if (x->type < y->type)
304 return -1;
305 if (x->type > y->type)
306 return 1;
307
308 if (x->class < y->class)
309 return -1;
310 if (x->class > y->class)
311 return 1;
312
313 return 0;
314}
315
316const struct hash_ops dns_resource_key_hash_ops = {
317 .hash = dns_resource_key_hash_func,
318 .compare = dns_resource_key_compare_func
319};
320
321char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size) {
322 const char *c, *t;
323 char *ans = buf;
324
325 /* If we cannot convert the CLASS/TYPE into a known string,
326 use the format recommended by RFC 3597, Section 5. */
327
328 c = dns_class_to_string(key->class);
329 t = dns_type_to_string(key->type);
330
331 snprintf(buf, buf_size, "%s %s%s%.0u %s%s%.0u",
332 dns_resource_key_name(key),
333 strempty(c), c ? "" : "CLASS", c ? 0 : key->class,
334 strempty(t), t ? "" : "TYPE", t ? 0 : key->type);
335
336 return ans;
337}
338
339bool_Bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) {
340 assert(a)do { if ((__builtin_expect(!!(!(a)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("a"), "../src/resolve/resolved-dns-rr.c"
, 340, __PRETTY_FUNCTION__); } while (0);
341 assert(b)do { if ((__builtin_expect(!!(!(b)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("b"), "../src/resolve/resolved-dns-rr.c"
, 341, __PRETTY_FUNCTION__); } while (0);
342
343 /* Try to replace one RR key by another if they are identical, thus saving a bit of memory. Note that we do
344 * this only for RR keys, not for RRs themselves, as they carry a lot of additional metadata (where they come
345 * from, validity data, and suchlike), and cannot be replaced so easily by other RRs that have the same
346 * superficial data. */
347
348 if (!*a)
349 return false0;
350 if (!*b)
351 return false0;
352
353 /* We refuse merging const keys */
354 if ((*a)->n_ref == (unsigned) -1)
355 return false0;
356 if ((*b)->n_ref == (unsigned) -1)
357 return false0;
358
359 /* Already the same? */
360 if (*a == *b)
361 return true1;
362
363 /* Are they really identical? */
364 if (dns_resource_key_equal(*a, *b) <= 0)
365 return false0;
366
367 /* Keep the one which already has more references. */
368 if ((*a)->n_ref > (*b)->n_ref) {
369 dns_resource_key_unref(*b);
370 *b = dns_resource_key_ref(*a);
371 } else {
372 dns_resource_key_unref(*a);
373 *a = dns_resource_key_ref(*b);
374 }
375
376 return true1;
377}
378
379DnsResourceRecord* dns_resource_record_new(DnsResourceKey *key) {
380 DnsResourceRecord *rr;
381
382 rr = new0(DnsResourceRecord, 1)((DnsResourceRecord*) calloc((1), sizeof(DnsResourceRecord)));
383 if (!rr)
384 return NULL((void*)0);
385
386 rr->n_ref = 1;
387 rr->key = dns_resource_key_ref(key);
388 rr->expiry = USEC_INFINITY((usec_t) -1);
389 rr->n_skip_labels_signer = rr->n_skip_labels_source = (unsigned) -1;
390
391 return rr;
392}
393
394DnsResourceRecord* dns_resource_record_new_full(uint16_t class, uint16_t type, const char *name) {
395 _cleanup_(dns_resource_key_unrefp)__attribute__((cleanup(dns_resource_key_unrefp))) DnsResourceKey *key = NULL((void*)0);
396
397 key = dns_resource_key_new(class, type, name);
398 if (!key)
399 return NULL((void*)0);
400
401 return dns_resource_record_new(key);
402}
403
404DnsResourceRecord* dns_resource_record_ref(DnsResourceRecord *rr) {
405 if (!rr)
406 return NULL((void*)0);
407
408 assert(rr->n_ref > 0)do { if ((__builtin_expect(!!(!(rr->n_ref > 0)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr->n_ref > 0"), "../src/resolve/resolved-dns-rr.c"
, 408, __PRETTY_FUNCTION__); } while (0);
409 rr->n_ref++;
410
411 return rr;
412}
413
414DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) {
415 if (!rr)
416 return NULL((void*)0);
417
418 assert(rr->n_ref > 0)do { if ((__builtin_expect(!!(!(rr->n_ref > 0)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr->n_ref > 0"), "../src/resolve/resolved-dns-rr.c"
, 418, __PRETTY_FUNCTION__); } while (0);
419
420 if (rr->n_ref > 1) {
421 rr->n_ref--;
422 return NULL((void*)0);
423 }
424
425 if (rr->key) {
426 switch(rr->key->type) {
427
428 case DNS_TYPE_SRV:
429 free(rr->srv.name);
430 break;
431
432 case DNS_TYPE_PTR:
433 case DNS_TYPE_NS:
434 case DNS_TYPE_CNAME:
435 case DNS_TYPE_DNAME:
436 free(rr->ptr.name);
437 break;
438
439 case DNS_TYPE_HINFO:
440 free(rr->hinfo.cpu);
441 free(rr->hinfo.os);
442 break;
443
444 case DNS_TYPE_TXT:
445 case DNS_TYPE_SPF:
446 dns_txt_item_free_all(rr->txt.items);
447 break;
448
449 case DNS_TYPE_SOA:
450 free(rr->soa.mname);
451 free(rr->soa.rname);
452 break;
453
454 case DNS_TYPE_MX:
455 free(rr->mx.exchange);
456 break;
457
458 case DNS_TYPE_DS:
459 free(rr->ds.digest);
460 break;
461
462 case DNS_TYPE_SSHFP:
463 free(rr->sshfp.fingerprint);
464 break;
465
466 case DNS_TYPE_DNSKEY:
467 free(rr->dnskey.key);
468 break;
469
470 case DNS_TYPE_RRSIG:
471 free(rr->rrsig.signer);
472 free(rr->rrsig.signature);
473 break;
474
475 case DNS_TYPE_NSEC:
476 free(rr->nsec.next_domain_name);
477 bitmap_free(rr->nsec.types);
478 break;
479
480 case DNS_TYPE_NSEC3:
481 free(rr->nsec3.next_hashed_name);
482 free(rr->nsec3.salt);
483 bitmap_free(rr->nsec3.types);
484 break;
485
486 case DNS_TYPE_LOC:
487 case DNS_TYPE_A:
488 case DNS_TYPE_AAAA:
489 break;
490
491 case DNS_TYPE_TLSA:
492 free(rr->tlsa.data);
493 break;
494
495 case DNS_TYPE_CAA:
496 free(rr->caa.tag);
497 free(rr->caa.value);
498 break;
499
500 case DNS_TYPE_OPENPGPKEY:
501 default:
502 if (!rr->unparseable)
503 free(rr->generic.data);
504 }
505
506 if (rr->unparseable)
507 free(rr->generic.data);
508
509 free(rr->wire_format);
510 dns_resource_key_unref(rr->key);
511 }
512
513 free(rr->to_string);
514 return mfree(rr);
515}
516
517int dns_resource_record_new_reverse(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *hostname) {
518 _cleanup_(dns_resource_key_unrefp)__attribute__((cleanup(dns_resource_key_unrefp))) DnsResourceKey *key = NULL((void*)0);
519 _cleanup_(dns_resource_record_unrefp)__attribute__((cleanup(dns_resource_record_unrefp))) DnsResourceRecord *rr = NULL((void*)0);
520 _cleanup_free___attribute__((cleanup(freep))) char *ptr = NULL((void*)0);
521 int r;
522
523 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/resolve/resolved-dns-rr.c"
, 523, __PRETTY_FUNCTION__); } while (0);
524 assert(address)do { if ((__builtin_expect(!!(!(address)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("address"), "../src/resolve/resolved-dns-rr.c"
, 524, __PRETTY_FUNCTION__); } while (0);
525 assert(hostname)do { if ((__builtin_expect(!!(!(hostname)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("hostname"), "../src/resolve/resolved-dns-rr.c"
, 525, __PRETTY_FUNCTION__); } while (0);
526
527 r = dns_name_reverse(family, address, &ptr);
528 if (r < 0)
529 return r;
530
531 key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, ptr);
532 if (!key)
533 return -ENOMEM12;
534
535 ptr = NULL((void*)0);
536
537 rr = dns_resource_record_new(key);
538 if (!rr)
539 return -ENOMEM12;
540
541 rr->ptr.name = strdup(hostname);
542 if (!rr->ptr.name)
543 return -ENOMEM12;
544
545 *ret = TAKE_PTR(rr)({ typeof(rr) _ptr_ = (rr); (rr) = ((void*)0); _ptr_; });
546
547 return 0;
548}
549
550int dns_resource_record_new_address(DnsResourceRecord **ret, int family, const union in_addr_union *address, const char *name) {
551 DnsResourceRecord *rr;
552
553 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/resolve/resolved-dns-rr.c"
, 553, __PRETTY_FUNCTION__); } while (0);
554 assert(address)do { if ((__builtin_expect(!!(!(address)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("address"), "../src/resolve/resolved-dns-rr.c"
, 554, __PRETTY_FUNCTION__); } while (0);
555 assert(family)do { if ((__builtin_expect(!!(!(family)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("family"), "../src/resolve/resolved-dns-rr.c"
, 555, __PRETTY_FUNCTION__); } while (0);
556
557 if (family == AF_INET2) {
558
559 rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, name);
560 if (!rr)
561 return -ENOMEM12;
562
563 rr->a.in_addr = address->in;
564
565 } else if (family == AF_INET610) {
566
567 rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_AAAA, name);
568 if (!rr)
569 return -ENOMEM12;
570
571 rr->aaaa.in6_addr = address->in6;
572 } else
573 return -EAFNOSUPPORT97;
574
575 *ret = rr;
576
577 return 0;
578}
579
580#define FIELD_EQUAL(a, b, field)((a).field_size == (b).field_size && memcmp((a).field
, (b).field, (a).field_size) == 0) \
581 ((a).field ## _size == (b).field ## _size && \
582 memcmp((a).field, (b).field, (a).field ## _size) == 0)
583
584int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecord *b) {
585 int r;
586
587 assert(a)do { if ((__builtin_expect(!!(!(a)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("a"), "../src/resolve/resolved-dns-rr.c"
, 587, __PRETTY_FUNCTION__); } while (0);
588 assert(b)do { if ((__builtin_expect(!!(!(b)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("b"), "../src/resolve/resolved-dns-rr.c"
, 588, __PRETTY_FUNCTION__); } while (0);
589
590 if (a == b)
591 return 1;
592
593 r = dns_resource_key_equal(a->key, b->key);
594 if (r <= 0)
595 return r;
596
597 if (a->unparseable != b->unparseable)
598 return 0;
599
600 switch (a->unparseable ? _DNS_TYPE_INVALID : a->key->type) {
601
602 case DNS_TYPE_SRV:
603 r = dns_name_equal(a->srv.name, b->srv.name);
604 if (r <= 0)
605 return r;
606
607 return a->srv.priority == b->srv.priority &&
608 a->srv.weight == b->srv.weight &&
609 a->srv.port == b->srv.port;
610
611 case DNS_TYPE_PTR:
612 case DNS_TYPE_NS:
613 case DNS_TYPE_CNAME:
614 case DNS_TYPE_DNAME:
615 return dns_name_equal(a->ptr.name, b->ptr.name);
616
617 case DNS_TYPE_HINFO:
618 return strcaseeq(a->hinfo.cpu, b->hinfo.cpu)(strcasecmp((a->hinfo.cpu),(b->hinfo.cpu)) == 0) &&
619 strcaseeq(a->hinfo.os, b->hinfo.os)(strcasecmp((a->hinfo.os),(b->hinfo.os)) == 0);
620
621 case DNS_TYPE_SPF: /* exactly the same as TXT */
622 case DNS_TYPE_TXT:
623 return dns_txt_item_equal(a->txt.items, b->txt.items);
624
625 case DNS_TYPE_A:
626 return memcmp(&a->a.in_addr, &b->a.in_addr, sizeof(struct in_addr)) == 0;
627
628 case DNS_TYPE_AAAA:
629 return memcmp(&a->aaaa.in6_addr, &b->aaaa.in6_addr, sizeof(struct in6_addr)) == 0;
630
631 case DNS_TYPE_SOA:
632 r = dns_name_equal(a->soa.mname, b->soa.mname);
633 if (r <= 0)
634 return r;
635 r = dns_name_equal(a->soa.rname, b->soa.rname);
636 if (r <= 0)
637 return r;
638
639 return a->soa.serial == b->soa.serial &&
640 a->soa.refresh == b->soa.refresh &&
641 a->soa.retry == b->soa.retry &&
642 a->soa.expire == b->soa.expire &&
643 a->soa.minimum == b->soa.minimum;
644
645 case DNS_TYPE_MX:
646 if (a->mx.priority != b->mx.priority)
647 return 0;
648
649 return dns_name_equal(a->mx.exchange, b->mx.exchange);
650
651 case DNS_TYPE_LOC:
652 assert(a->loc.version == b->loc.version)do { if ((__builtin_expect(!!(!(a->loc.version == b->loc
.version)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("a->loc.version == b->loc.version"
), "../src/resolve/resolved-dns-rr.c", 652, __PRETTY_FUNCTION__
); } while (0);
653
654 return a->loc.size == b->loc.size &&
655 a->loc.horiz_pre == b->loc.horiz_pre &&
656 a->loc.vert_pre == b->loc.vert_pre &&
657 a->loc.latitude == b->loc.latitude &&
658 a->loc.longitude == b->loc.longitude &&
659 a->loc.altitude == b->loc.altitude;
660
661 case DNS_TYPE_DS:
662 return a->ds.key_tag == b->ds.key_tag &&
663 a->ds.algorithm == b->ds.algorithm &&
664 a->ds.digest_type == b->ds.digest_type &&
665 FIELD_EQUAL(a->ds, b->ds, digest)((a->ds).digest_size == (b->ds).digest_size && memcmp
((a->ds).digest, (b->ds).digest, (a->ds).digest_size
) == 0);
666
667 case DNS_TYPE_SSHFP:
668 return a->sshfp.algorithm == b->sshfp.algorithm &&
669 a->sshfp.fptype == b->sshfp.fptype &&
670 FIELD_EQUAL(a->sshfp, b->sshfp, fingerprint)((a->sshfp).fingerprint_size == (b->sshfp).fingerprint_size
&& memcmp((a->sshfp).fingerprint, (b->sshfp).fingerprint
, (a->sshfp).fingerprint_size) == 0);
671
672 case DNS_TYPE_DNSKEY:
673 return a->dnskey.flags == b->dnskey.flags &&
674 a->dnskey.protocol == b->dnskey.protocol &&
675 a->dnskey.algorithm == b->dnskey.algorithm &&
676 FIELD_EQUAL(a->dnskey, b->dnskey, key)((a->dnskey).key_size == (b->dnskey).key_size &&
memcmp((a->dnskey).key, (b->dnskey).key, (a->dnskey
).key_size) == 0);
677
678 case DNS_TYPE_RRSIG:
679 /* do the fast comparisons first */
680 return a->rrsig.type_covered == b->rrsig.type_covered &&
681 a->rrsig.algorithm == b->rrsig.algorithm &&
682 a->rrsig.labels == b->rrsig.labels &&
683 a->rrsig.original_ttl == b->rrsig.original_ttl &&
684 a->rrsig.expiration == b->rrsig.expiration &&
685 a->rrsig.inception == b->rrsig.inception &&
686 a->rrsig.key_tag == b->rrsig.key_tag &&
687 FIELD_EQUAL(a->rrsig, b->rrsig, signature)((a->rrsig).signature_size == (b->rrsig).signature_size
&& memcmp((a->rrsig).signature, (b->rrsig).signature
, (a->rrsig).signature_size) == 0) &&
688 dns_name_equal(a->rrsig.signer, b->rrsig.signer);
689
690 case DNS_TYPE_NSEC:
691 return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) &&
692 bitmap_equal(a->nsec.types, b->nsec.types);
693
694 case DNS_TYPE_NSEC3:
695 return a->nsec3.algorithm == b->nsec3.algorithm &&
696 a->nsec3.flags == b->nsec3.flags &&
697 a->nsec3.iterations == b->nsec3.iterations &&
698 FIELD_EQUAL(a->nsec3, b->nsec3, salt)((a->nsec3).salt_size == (b->nsec3).salt_size &&
memcmp((a->nsec3).salt, (b->nsec3).salt, (a->nsec3)
.salt_size) == 0) &&
699 FIELD_EQUAL(a->nsec3, b->nsec3, next_hashed_name)((a->nsec3).next_hashed_name_size == (b->nsec3).next_hashed_name_size
&& memcmp((a->nsec3).next_hashed_name, (b->nsec3
).next_hashed_name, (a->nsec3).next_hashed_name_size) == 0
) &&
700 bitmap_equal(a->nsec3.types, b->nsec3.types);
701
702 case DNS_TYPE_TLSA:
703 return a->tlsa.cert_usage == b->tlsa.cert_usage &&
704 a->tlsa.selector == b->tlsa.selector &&
705 a->tlsa.matching_type == b->tlsa.matching_type &&
706 FIELD_EQUAL(a->tlsa, b->tlsa, data)((a->tlsa).data_size == (b->tlsa).data_size && memcmp
((a->tlsa).data, (b->tlsa).data, (a->tlsa).data_size
) == 0);
707
708 case DNS_TYPE_CAA:
709 return a->caa.flags == b->caa.flags &&
710 streq(a->caa.tag, b->caa.tag)(strcmp((a->caa.tag),(b->caa.tag)) == 0) &&
711 FIELD_EQUAL(a->caa, b->caa, value)((a->caa).value_size == (b->caa).value_size && memcmp
((a->caa).value, (b->caa).value, (a->caa).value_size
) == 0);
712
713 case DNS_TYPE_OPENPGPKEY:
714 default:
715 return FIELD_EQUAL(a->generic, b->generic, data)((a->generic).data_size == (b->generic).data_size &&
memcmp((a->generic).data, (b->generic).data, (a->generic
).data_size) == 0);
716 }
717}
718
719static char* format_location(uint32_t latitude, uint32_t longitude, uint32_t altitude,
720 uint8_t size, uint8_t horiz_pre, uint8_t vert_pre) {
721 char *s;
722 char NS = latitude >= 1U<<31 ? 'N' : 'S';
723 char EW = longitude >= 1U<<31 ? 'E' : 'W';
724
725 int lat = latitude >= 1U<<31 ? (int) (latitude - (1U<<31)) : (int) ((1U<<31) - latitude);
726 int lon = longitude >= 1U<<31 ? (int) (longitude - (1U<<31)) : (int) ((1U<<31) - longitude);
727 double alt = altitude >= 10000000u ? altitude - 10000000u : -(double)(10000000u - altitude);
728 double siz = (size >> 4) * exp10((double) (size & 0xF));
729 double hor = (horiz_pre >> 4) * exp10((double) (horiz_pre & 0xF));
730 double ver = (vert_pre >> 4) * exp10((double) (vert_pre & 0xF));
731
732 if (asprintf(&s, "%d %d %.3f %c %d %d %.3f %c %.2fm %.2fm %.2fm %.2fm",
733 (lat / 60000 / 60),
734 (lat / 60000) % 60,
735 (lat % 60000) / 1000.,
736 NS,
737 (lon / 60000 / 60),
738 (lon / 60000) % 60,
739 (lon % 60000) / 1000.,
740 EW,
741 alt / 100.,
742 siz / 100.,
743 hor / 100.,
744 ver / 100.) < 0)
745 return NULL((void*)0);
746
747 return s;
748}
749
750static int format_timestamp_dns(char *buf, size_t l, time_t sec) {
751 struct tm tm;
752
753 assert(buf)do { if ((__builtin_expect(!!(!(buf)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("buf"), "../src/resolve/resolved-dns-rr.c"
, 753, __PRETTY_FUNCTION__); } while (0);
754 assert(l > STRLEN("YYYYMMDDHHmmSS"))do { if ((__builtin_expect(!!(!(l > (sizeof("""YYYYMMDDHHmmSS"
"") - 1))),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("l > STRLEN(\"YYYYMMDDHHmmSS\")"
), "../src/resolve/resolved-dns-rr.c", 754, __PRETTY_FUNCTION__
); } while (0);
755
756 if (!gmtime_r(&sec, &tm))
757 return -EINVAL22;
758
759 if (strftime(buf, l, "%Y%m%d%H%M%S", &tm) <= 0)
760 return -EINVAL22;
761
762 return 0;
763}
764
765static char *format_types(Bitmap *types) {
766 _cleanup_strv_free___attribute__((cleanup(strv_freep))) char **strv = NULL((void*)0);
767 _cleanup_free___attribute__((cleanup(freep))) char *str = NULL((void*)0);
768 Iterator i;
769 unsigned type;
770 int r;
771
772 BITMAP_FOREACH(type, types, i)for ((i).idx = 0; bitmap_iterate((types), &(i), (unsigned
*)&(type)); ) {
773 if (dns_type_to_string(type)) {
774 r = strv_extend(&strv, dns_type_to_string(type));
775 if (r < 0)
776 return NULL((void*)0);
777 } else {
778 char *t;
779
780 r = asprintf(&t, "TYPE%u", type);
781 if (r < 0)
782 return NULL((void*)0);
783
784 r = strv_consume(&strv, t);
785 if (r < 0)
786 return NULL((void*)0);
787 }
788 }
789
790 str = strv_join(strv, " ");
791 if (!str)
792 return NULL((void*)0);
793
794 return strjoin("( ", str, " )")strjoin_real(("( "), str, " )", ((void*)0));
795}
796
797static char *format_txt(DnsTxtItem *first) {
798 DnsTxtItem *i;
799 size_t c = 1;
800 char *p, *s;
801
802 LIST_FOREACH(items, i, first)for ((i) = (first); (i); (i) = (i)->items_next)
803 c += i->length * 4 + 3;
804
805 p = s = new(char, c)((char*) malloc_multiply(sizeof(char), (c)));
806 if (!s)
807 return NULL((void*)0);
808
809 LIST_FOREACH(items, i, first)for ((i) = (first); (i); (i) = (i)->items_next) {
810 size_t j;
811
812 if (i != first)
813 *(p++) = ' ';
814
815 *(p++) = '"';
816
817 for (j = 0; j < i->length; j++) {
818 if (i->data[j] < ' ' || i->data[j] == '"' || i->data[j] >= 127) {
819 *(p++) = '\\';
820 *(p++) = '0' + (i->data[j] / 100);
821 *(p++) = '0' + ((i->data[j] / 10) % 10);
822 *(p++) = '0' + (i->data[j] % 10);
823 } else
824 *(p++) = i->data[j];
825 }
826
827 *(p++) = '"';
828 }
829
830 *p = 0;
831 return s;
832}
833
834const char *dns_resource_record_to_string(DnsResourceRecord *rr) {
835 _cleanup_free___attribute__((cleanup(freep))) char *t = NULL((void*)0);
836 char *s, k[DNS_RESOURCE_KEY_STRING_MAX((sizeof "CLASS" + (2+(sizeof(uint16_t) <= 1 ? 3 : sizeof(
uint16_t) <= 2 ? 5 : sizeof(uint16_t) <= 4 ? 10 : sizeof
(uint16_t) <= 8 ? 20 : sizeof(int[-2*(sizeof(uint16_t) >
8)])))) + (sizeof "CLASS" + (2+(sizeof(uint16_t) <= 1 ? 3
: sizeof(uint16_t) <= 2 ? 5 : sizeof(uint16_t) <= 4 ? 10
: sizeof(uint16_t) <= 8 ? 20 : sizeof(int[-2*(sizeof(uint16_t
) > 8)])))) + 253 + 1)];
837 int r;
838
839 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 839, __PRETTY_FUNCTION__); } while (0);
1
Assuming 'rr' is non-null
→
2
←
Taking false branch
→
3
←
Loop condition is false. Exiting loop
→
840
841 if (rr->to_string)
4
←
Assuming field 'to_string' is null
→
5
←
Taking false branch
→
842 return rr->to_string;
843
844 dns_resource_key_to_string(rr->key, k, sizeof(k));
845
846 switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
6
←
Assuming field 'unparseable' is false
→
7
←
'?' condition is false
→
8
←
Control jumps to 'case DNS_TYPE_RRSIG:' at line 1021
→
847
848 case DNS_TYPE_SRV:
849 r = asprintf(&s, "%s %u %u %u %s",
850 k,
851 rr->srv.priority,
852 rr->srv.weight,
853 rr->srv.port,
854 strna(rr->srv.name));
855 if (r < 0)
856 return NULL((void*)0);
857 break;
858
859 case DNS_TYPE_PTR:
860 case DNS_TYPE_NS:
861 case DNS_TYPE_CNAME:
862 case DNS_TYPE_DNAME:
863 s = strjoin(k, " ", rr->ptr.name)strjoin_real((k), " ", rr->ptr.name, ((void*)0));
864 if (!s)
865 return NULL((void*)0);
866
867 break;
868
869 case DNS_TYPE_HINFO:
870 s = strjoin(k, " ", rr->hinfo.cpu, " ", rr->hinfo.os)strjoin_real((k), " ", rr->hinfo.cpu, " ", rr->hinfo.os
, ((void*)0));
871 if (!s)
872 return NULL((void*)0);
873 break;
874
875 case DNS_TYPE_SPF: /* exactly the same as TXT */
876 case DNS_TYPE_TXT:
877 t = format_txt(rr->txt.items);
878 if (!t)
879 return NULL((void*)0);
880
881 s = strjoin(k, " ", t)strjoin_real((k), " ", t, ((void*)0));
882 if (!s)
883 return NULL((void*)0);
884 break;
885
886 case DNS_TYPE_A: {
887 _cleanup_free___attribute__((cleanup(freep))) char *x = NULL((void*)0);
888
889 r = in_addr_to_string(AF_INET2, (const union in_addr_union*) &rr->a.in_addr, &x);
890 if (r < 0)
891 return NULL((void*)0);
892
893 s = strjoin(k, " ", x)strjoin_real((k), " ", x, ((void*)0));
894 if (!s)
895 return NULL((void*)0);
896 break;
897 }
898
899 case DNS_TYPE_AAAA:
900 r = in_addr_to_string(AF_INET610, (const union in_addr_union*) &rr->aaaa.in6_addr, &t);
901 if (r < 0)
902 return NULL((void*)0);
903
904 s = strjoin(k, " ", t)strjoin_real((k), " ", t, ((void*)0));
905 if (!s)
906 return NULL((void*)0);
907 break;
908
909 case DNS_TYPE_SOA:
910 r = asprintf(&s, "%s %s %s %u %u %u %u %u",
911 k,
912 strna(rr->soa.mname),
913 strna(rr->soa.rname),
914 rr->soa.serial,
915 rr->soa.refresh,
916 rr->soa.retry,
917 rr->soa.expire,
918 rr->soa.minimum);
919 if (r < 0)
920 return NULL((void*)0);
921 break;
922
923 case DNS_TYPE_MX:
924 r = asprintf(&s, "%s %u %s",
925 k,
926 rr->mx.priority,
927 rr->mx.exchange);
928 if (r < 0)
929 return NULL((void*)0);
930 break;
931
932 case DNS_TYPE_LOC:
933 assert(rr->loc.version == 0)do { if ((__builtin_expect(!!(!(rr->loc.version == 0)),0))
) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("rr->loc.version == 0"
), "../src/resolve/resolved-dns-rr.c", 933, __PRETTY_FUNCTION__
); } while (0);
934
935 t = format_location(rr->loc.latitude,
936 rr->loc.longitude,
937 rr->loc.altitude,
938 rr->loc.size,
939 rr->loc.horiz_pre,
940 rr->loc.vert_pre);
941 if (!t)
942 return NULL((void*)0);
943
944 s = strjoin(k, " ", t)strjoin_real((k), " ", t, ((void*)0));
945 if (!s)
946 return NULL((void*)0);
947 break;
948
949 case DNS_TYPE_DS:
950 t = hexmem(rr->ds.digest, rr->ds.digest_size);
951 if (!t)
952 return NULL((void*)0);
953
954 r = asprintf(&s, "%s %u %u %u %s",
955 k,
956 rr->ds.key_tag,
957 rr->ds.algorithm,
958 rr->ds.digest_type,
959 t);
960 if (r < 0)
961 return NULL((void*)0);
962 break;
963
964 case DNS_TYPE_SSHFP:
965 t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size);
966 if (!t)
967 return NULL((void*)0);
968
969 r = asprintf(&s, "%s %u %u %s",
970 k,
971 rr->sshfp.algorithm,
972 rr->sshfp.fptype,
973 t);
974 if (r < 0)
975 return NULL((void*)0);
976 break;
977
978 case DNS_TYPE_DNSKEY: {
979 _cleanup_free___attribute__((cleanup(freep))) char *alg = NULL((void*)0);
980 char *ss;
981 int n;
982 uint16_t key_tag;
983
984 key_tag = dnssec_keytag(rr, true1);
985
986 r = dnssec_algorithm_to_string_alloc(rr->dnskey.algorithm, &alg);
987 if (r < 0)
988 return NULL((void*)0);
989
990 r = asprintf(&s, "%s %u %u %s %n",
991 k,
992 rr->dnskey.flags,
993 rr->dnskey.protocol,
994 alg,
995 &n);
996 if (r < 0)
997 return NULL((void*)0);
998
999 r = base64_append(&s, n,
1000 rr->dnskey.key, rr->dnskey.key_size,
1001 8, columns());
1002 if (r < 0)
1003 return NULL((void*)0);
1004
1005 r = asprintf(&ss, "%s\n"
1006 " -- Flags:%s%s%s\n"
1007 " -- Key tag: %u",
1008 s,
1009 rr->dnskey.flags & DNSKEY_FLAG_SEP(1 << 0) ? " SEP" : "",
1010 rr->dnskey.flags & DNSKEY_FLAG_REVOKE(1 << 7) ? " REVOKE" : "",
1011 rr->dnskey.flags & DNSKEY_FLAG_ZONE_KEY(1 << 8) ? " ZONE_KEY" : "",
1012 key_tag);
1013 if (r < 0)
1014 return NULL((void*)0);
1015 free(s);
1016 s = ss;
1017
1018 break;
1019 }
1020
1021 case DNS_TYPE_RRSIG: {
1022 _cleanup_free___attribute__((cleanup(freep))) char *alg = NULL((void*)0);
1023 char expiration[STRLEN("YYYYMMDDHHmmSS")(sizeof("""YYYYMMDDHHmmSS""") - 1) + 1], inception[STRLEN("YYYYMMDDHHmmSS")(sizeof("""YYYYMMDDHHmmSS""") - 1) + 1];
1024 const char *type;
1025 int n;
1026
1027 type = dns_type_to_string(rr->rrsig.type_covered);
1028
1029 r = dnssec_algorithm_to_string_alloc(rr->rrsig.algorithm, &alg);
9
←
Calling 'dnssec_algorithm_to_string_alloc'
→
16
←
Returned allocated memory via 2nd parameter
→
1030 if (r
16.1
'r' is >= 0
 < 0)
17
←
Taking false branch
→
1031 return NULL((void*)0);
1032
1033 r = format_timestamp_dns(expiration, sizeof(expiration), rr->rrsig.expiration);
1034 if (r
17.1
'r' is < 0
 < 0)
18
←
Taking true branch
→
1035 return NULL((void*)0);
19
←
Potential leak of memory pointed to by 'alg'
1036
1037 r = format_timestamp_dns(inception, sizeof(inception), rr->rrsig.inception);
1038 if (r < 0)
1039 return NULL((void*)0);
1040
1041 /* TYPE?? follows
1042 * http://tools.ietf.org/html/rfc3597#section-5 */
1043
1044 r = asprintf(&s, "%s %s%.*u %s %u %u %s %s %u %s %n",
1045 k,
1046 type ?: "TYPE",
1047 type ? 0 : 1, type ? 0u : (unsigned) rr->rrsig.type_covered,
1048 alg,
1049 rr->rrsig.labels,
1050 rr->rrsig.original_ttl,
1051 expiration,
1052 inception,
1053 rr->rrsig.key_tag,
1054 rr->rrsig.signer,
1055 &n);
1056 if (r < 0)
1057 return NULL((void*)0);
1058
1059 r = base64_append(&s, n,
1060 rr->rrsig.signature, rr->rrsig.signature_size,
1061 8, columns());
1062 if (r < 0)
1063 return NULL((void*)0);
1064
1065 break;
1066 }
1067
1068 case DNS_TYPE_NSEC:
1069 t = format_types(rr->nsec.types);
1070 if (!t)
1071 return NULL((void*)0);
1072
1073 r = asprintf(&s, "%s %s %s",
1074 k,
1075 rr->nsec.next_domain_name,
1076 t);
1077 if (r < 0)
1078 return NULL((void*)0);
1079 break;
1080
1081 case DNS_TYPE_NSEC3: {
1082 _cleanup_free___attribute__((cleanup(freep))) char *salt = NULL((void*)0), *hash = NULL((void*)0);
1083
1084 if (rr->nsec3.salt_size > 0) {
1085 salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size);
1086 if (!salt)
1087 return NULL((void*)0);
1088 }
1089
1090 hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false0);
1091 if (!hash)
1092 return NULL((void*)0);
1093
1094 t = format_types(rr->nsec3.types);
1095 if (!t)
1096 return NULL((void*)0);
1097
1098 r = asprintf(&s, "%s %"PRIu8"u"" %"PRIu8"u"" %"PRIu16"u"" %s %s %s",
1099 k,
1100 rr->nsec3.algorithm,
1101 rr->nsec3.flags,
1102 rr->nsec3.iterations,
1103 rr->nsec3.salt_size > 0 ? salt : "-",
1104 hash,
1105 t);
1106 if (r < 0)
1107 return NULL((void*)0);
1108
1109 break;
1110 }
1111
1112 case DNS_TYPE_TLSA: {
1113 const char *cert_usage, *selector, *matching_type;
1114
1115 cert_usage = tlsa_cert_usage_to_string(rr->tlsa.cert_usage);
1116 selector = tlsa_selector_to_string(rr->tlsa.selector);
1117 matching_type = tlsa_matching_type_to_string(rr->tlsa.matching_type);
1118
1119 t = hexmem(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size);
1120 if (!t)
1121 return NULL((void*)0);
1122
1123 r = asprintf(&s,
1124 "%s %u %u %u %s\n"
1125 " -- Cert. usage: %s\n"
1126 " -- Selector: %s\n"
1127 " -- Matching type: %s",
1128 k,
1129 rr->tlsa.cert_usage,
1130 rr->tlsa.selector,
1131 rr->tlsa.matching_type,
1132 t,
1133 cert_usage,
1134 selector,
1135 matching_type);
1136 if (r < 0)
1137 return NULL((void*)0);
1138
1139 break;
1140 }
1141
1142 case DNS_TYPE_CAA: {
1143 _cleanup_free___attribute__((cleanup(freep))) char *value;
1144
1145 value = octescape(rr->caa.value, rr->caa.value_size);
1146 if (!value)
1147 return NULL((void*)0);
1148
1149 r = asprintf(&s, "%s %u %s \"%s\"%s%s%s%.0u",
1150 k,
1151 rr->caa.flags,
1152 rr->caa.tag,
1153 value,
1154 rr->caa.flags ? "\n -- Flags:" : "",
1155 rr->caa.flags & CAA_FLAG_CRITICAL(1u << 7) ? " critical" : "",
1156 rr->caa.flags & ~CAA_FLAG_CRITICAL(1u << 7) ? " " : "",
1157 rr->caa.flags & ~CAA_FLAG_CRITICAL(1u << 7));
1158 if (r < 0)
1159 return NULL((void*)0);
1160
1161 break;
1162 }
1163
1164 case DNS_TYPE_OPENPGPKEY: {
1165 int n;
1166
1167 r = asprintf(&s, "%s %n",
1168 k,
1169 &n);
1170 if (r < 0)
1171 return NULL((void*)0);
1172
1173 r = base64_append(&s, n,
1174 rr->generic.data, rr->generic.data_size,
1175 8, columns());
1176 if (r < 0)
1177 return NULL((void*)0);
1178 break;
1179 }
1180
1181 default:
1182 t = hexmem(rr->generic.data, rr->generic.data_size);
1183 if (!t)
1184 return NULL((void*)0);
1185
1186 /* Format as documented in RFC 3597, Section 5 */
1187 r = asprintf(&s, "%s \\# %zu %s", k, rr->generic.data_size, t);
1188 if (r < 0)
1189 return NULL((void*)0);
1190 break;
1191 }
1192
1193 rr->to_string = s;
1194 return s;
1195}
1196
1197ssize_t dns_resource_record_payload(DnsResourceRecord *rr, void **out) {
1198 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1198, __PRETTY_FUNCTION__); } while (0);
1199 assert(out)do { if ((__builtin_expect(!!(!(out)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("out"), "../src/resolve/resolved-dns-rr.c"
, 1199, __PRETTY_FUNCTION__); } while (0);
1200
1201 switch(rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
1202 case DNS_TYPE_SRV:
1203 case DNS_TYPE_PTR:
1204 case DNS_TYPE_NS:
1205 case DNS_TYPE_CNAME:
1206 case DNS_TYPE_DNAME:
1207 case DNS_TYPE_HINFO:
1208 case DNS_TYPE_SPF:
1209 case DNS_TYPE_TXT:
1210 case DNS_TYPE_A:
1211 case DNS_TYPE_AAAA:
1212 case DNS_TYPE_SOA:
1213 case DNS_TYPE_MX:
1214 case DNS_TYPE_LOC:
1215 case DNS_TYPE_DS:
1216 case DNS_TYPE_DNSKEY:
1217 case DNS_TYPE_RRSIG:
1218 case DNS_TYPE_NSEC:
1219 case DNS_TYPE_NSEC3:
1220 return -EINVAL22;
1221
1222 case DNS_TYPE_SSHFP:
1223 *out = rr->sshfp.fingerprint;
1224 return rr->sshfp.fingerprint_size;
1225
1226 case DNS_TYPE_TLSA:
1227 *out = rr->tlsa.data;
1228 return rr->tlsa.data_size;
1229
1230 case DNS_TYPE_OPENPGPKEY:
1231 default:
1232 *out = rr->generic.data;
1233 return rr->generic.data_size;
1234 }
1235}
1236
1237int dns_resource_record_to_wire_format(DnsResourceRecord *rr, bool_Bool canonical) {
1238
1239 DnsPacket packet = {
1240 .n_ref = 1,
1241 .protocol = DNS_PROTOCOL_DNS,
1242 .on_stack = true1,
1243 .refuse_compression = true1,
1244 .canonical_form = canonical,
1245 };
1246
1247 size_t start, rds;
1248 int r;
1249
1250 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1250, __PRETTY_FUNCTION__); } while (0);
1251
1252 /* Generates the RR in wire-format, optionally in the
1253 * canonical form as discussed in the DNSSEC RFC 4034, Section
1254 * 6.2. We allocate a throw-away DnsPacket object on the stack
1255 * here, because we need some book-keeping for memory
1256 * management, and can reuse the DnsPacket serializer, that
1257 * can generate the canonical form, too, but also knows label
1258 * compression and suchlike. */
1259
1260 if (rr->wire_format && rr->wire_format_canonical == canonical)
1261 return 0;
1262
1263 r = dns_packet_append_rr(&packet, rr, 0, &start, &rds);
1264 if (r < 0)
1265 return r;
1266
1267 assert(start == 0)do { if ((__builtin_expect(!!(!(start == 0)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("start == 0"), "../src/resolve/resolved-dns-rr.c"
, 1267, __PRETTY_FUNCTION__); } while (0);
1268 assert(packet._data)do { if ((__builtin_expect(!!(!(packet._data)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("packet._data"), "../src/resolve/resolved-dns-rr.c"
, 1268, __PRETTY_FUNCTION__); } while (0);
1269
1270 free(rr->wire_format);
1271 rr->wire_format = packet._data;
1272 rr->wire_format_size = packet.size;
1273 rr->wire_format_rdata_offset = rds;
1274 rr->wire_format_canonical = canonical;
1275
1276 packet._data = NULL((void*)0);
1277 dns_packet_unref(&packet);
1278
1279 return 0;
1280}
1281
1282int dns_resource_record_signer(DnsResourceRecord *rr, const char **ret) {
1283 const char *n;
1284 int r;
1285
1286 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1286, __PRETTY_FUNCTION__); } while (0);
1287 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/resolve/resolved-dns-rr.c"
, 1287, __PRETTY_FUNCTION__); } while (0);
1288
1289 /* Returns the RRset's signer, if it is known. */
1290
1291 if (rr->n_skip_labels_signer == (unsigned) -1)
1292 return -ENODATA61;
1293
1294 n = dns_resource_key_name(rr->key);
1295 r = dns_name_skip(n, rr->n_skip_labels_signer, &n);
1296 if (r < 0)
1297 return r;
1298 if (r == 0)
1299 return -EINVAL22;
1300
1301 *ret = n;
1302 return 0;
1303}
1304
1305int dns_resource_record_source(DnsResourceRecord *rr, const char **ret) {
1306 const char *n;
1307 int r;
1308
1309 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1309, __PRETTY_FUNCTION__); } while (0);
1310 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/resolve/resolved-dns-rr.c"
, 1310, __PRETTY_FUNCTION__); } while (0);
1311
1312 /* Returns the RRset's synthesizing source, if it is known. */
1313
1314 if (rr->n_skip_labels_source == (unsigned) -1)
1315 return -ENODATA61;
1316
1317 n = dns_resource_key_name(rr->key);
1318 r = dns_name_skip(n, rr->n_skip_labels_source, &n);
1319 if (r < 0)
1320 return r;
1321 if (r == 0)
1322 return -EINVAL22;
1323
1324 *ret = n;
1325 return 0;
1326}
1327
1328int dns_resource_record_is_signer(DnsResourceRecord *rr, const char *zone) {
1329 const char *signer;
1330 int r;
1331
1332 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1332, __PRETTY_FUNCTION__); } while (0);
1333
1334 r = dns_resource_record_signer(rr, &signer);
1335 if (r < 0)
1336 return r;
1337
1338 return dns_name_equal(zone, signer);
1339}
1340
1341int dns_resource_record_is_synthetic(DnsResourceRecord *rr) {
1342 int r;
1343
1344 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1344, __PRETTY_FUNCTION__); } while (0);
1345
1346 /* Returns > 0 if the RR is generated from a wildcard, and is not the asterisk name itself */
1347
1348 if (rr->n_skip_labels_source == (unsigned) -1)
1349 return -ENODATA61;
1350
1351 if (rr->n_skip_labels_source == 0)
1352 return 0;
1353
1354 if (rr->n_skip_labels_source > 1)
1355 return 1;
1356
1357 r = dns_name_startswith(dns_resource_key_name(rr->key), "*");
1358 if (r < 0)
1359 return r;
1360
1361 return !r;
1362}
1363
1364void dns_resource_record_hash_func(const void *i, struct siphash *state) {
1365 const DnsResourceRecord *rr = i;
1366
1367 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1367, __PRETTY_FUNCTION__); } while (0);
1368
1369 dns_resource_key_hash_func(rr->key, state);
1370
1371 switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
1372
1373 case DNS_TYPE_SRV:
1374 siphash24_compress(&rr->srv.priority, sizeof(rr->srv.priority), state);
1375 siphash24_compress(&rr->srv.weight, sizeof(rr->srv.weight), state);
1376 siphash24_compress(&rr->srv.port, sizeof(rr->srv.port), state);
1377 dns_name_hash_func(rr->srv.name, state);
1378 break;
1379
1380 case DNS_TYPE_PTR:
1381 case DNS_TYPE_NS:
1382 case DNS_TYPE_CNAME:
1383 case DNS_TYPE_DNAME:
1384 dns_name_hash_func(rr->ptr.name, state);
1385 break;
1386
1387 case DNS_TYPE_HINFO:
1388 string_hash_func(rr->hinfo.cpu, state);
1389 string_hash_func(rr->hinfo.os, state);
1390 break;
1391
1392 case DNS_TYPE_TXT:
1393 case DNS_TYPE_SPF: {
1394 DnsTxtItem *j;
1395
1396 LIST_FOREACH(items, j, rr->txt.items)for ((j) = (rr->txt.items); (j); (j) = (j)->items_next) {
1397 siphash24_compress(j->data, j->length, state);
1398
1399 /* Add an extra NUL byte, so that "a" followed by "b" doesn't result in the same hash as "ab"
1400 * followed by "". */
1401 siphash24_compress_byte(0, state)siphash24_compress((const uint8_t[]) { (0) }, 1, (state));
1402 }
1403 break;
1404 }
1405
1406 case DNS_TYPE_A:
1407 siphash24_compress(&rr->a.in_addr, sizeof(rr->a.in_addr), state);
1408 break;
1409
1410 case DNS_TYPE_AAAA:
1411 siphash24_compress(&rr->aaaa.in6_addr, sizeof(rr->aaaa.in6_addr), state);
1412 break;
1413
1414 case DNS_TYPE_SOA:
1415 dns_name_hash_func(rr->soa.mname, state);
1416 dns_name_hash_func(rr->soa.rname, state);
1417 siphash24_compress(&rr->soa.serial, sizeof(rr->soa.serial), state);
1418 siphash24_compress(&rr->soa.refresh, sizeof(rr->soa.refresh), state);
1419 siphash24_compress(&rr->soa.retry, sizeof(rr->soa.retry), state);
1420 siphash24_compress(&rr->soa.expire, sizeof(rr->soa.expire), state);
1421 siphash24_compress(&rr->soa.minimum, sizeof(rr->soa.minimum), state);
1422 break;
1423
1424 case DNS_TYPE_MX:
1425 siphash24_compress(&rr->mx.priority, sizeof(rr->mx.priority), state);
1426 dns_name_hash_func(rr->mx.exchange, state);
1427 break;
1428
1429 case DNS_TYPE_LOC:
1430 siphash24_compress(&rr->loc.version, sizeof(rr->loc.version), state);
1431 siphash24_compress(&rr->loc.size, sizeof(rr->loc.size), state);
1432 siphash24_compress(&rr->loc.horiz_pre, sizeof(rr->loc.horiz_pre), state);
1433 siphash24_compress(&rr->loc.vert_pre, sizeof(rr->loc.vert_pre), state);
1434 siphash24_compress(&rr->loc.latitude, sizeof(rr->loc.latitude), state);
1435 siphash24_compress(&rr->loc.longitude, sizeof(rr->loc.longitude), state);
1436 siphash24_compress(&rr->loc.altitude, sizeof(rr->loc.altitude), state);
1437 break;
1438
1439 case DNS_TYPE_SSHFP:
1440 siphash24_compress(&rr->sshfp.algorithm, sizeof(rr->sshfp.algorithm), state);
1441 siphash24_compress(&rr->sshfp.fptype, sizeof(rr->sshfp.fptype), state);
1442 siphash24_compress(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size, state);
1443 break;
1444
1445 case DNS_TYPE_DNSKEY:
1446 siphash24_compress(&rr->dnskey.flags, sizeof(rr->dnskey.flags), state);
1447 siphash24_compress(&rr->dnskey.protocol, sizeof(rr->dnskey.protocol), state);
1448 siphash24_compress(&rr->dnskey.algorithm, sizeof(rr->dnskey.algorithm), state);
1449 siphash24_compress(rr->dnskey.key, rr->dnskey.key_size, state);
1450 break;
1451
1452 case DNS_TYPE_RRSIG:
1453 siphash24_compress(&rr->rrsig.type_covered, sizeof(rr->rrsig.type_covered), state);
1454 siphash24_compress(&rr->rrsig.algorithm, sizeof(rr->rrsig.algorithm), state);
1455 siphash24_compress(&rr->rrsig.labels, sizeof(rr->rrsig.labels), state);
1456 siphash24_compress(&rr->rrsig.original_ttl, sizeof(rr->rrsig.original_ttl), state);
1457 siphash24_compress(&rr->rrsig.expiration, sizeof(rr->rrsig.expiration), state);
1458 siphash24_compress(&rr->rrsig.inception, sizeof(rr->rrsig.inception), state);
1459 siphash24_compress(&rr->rrsig.key_tag, sizeof(rr->rrsig.key_tag), state);
1460 dns_name_hash_func(rr->rrsig.signer, state);
1461 siphash24_compress(rr->rrsig.signature, rr->rrsig.signature_size, state);
1462 break;
1463
1464 case DNS_TYPE_NSEC:
1465 dns_name_hash_func(rr->nsec.next_domain_name, state);
1466 /* FIXME: we leave out the type bitmap here. Hash
1467 * would be better if we'd take it into account
1468 * too. */
1469 break;
1470
1471 case DNS_TYPE_DS:
1472 siphash24_compress(&rr->ds.key_tag, sizeof(rr->ds.key_tag), state);
1473 siphash24_compress(&rr->ds.algorithm, sizeof(rr->ds.algorithm), state);
1474 siphash24_compress(&rr->ds.digest_type, sizeof(rr->ds.digest_type), state);
1475 siphash24_compress(rr->ds.digest, rr->ds.digest_size, state);
1476 break;
1477
1478 case DNS_TYPE_NSEC3:
1479 siphash24_compress(&rr->nsec3.algorithm, sizeof(rr->nsec3.algorithm), state);
1480 siphash24_compress(&rr->nsec3.flags, sizeof(rr->nsec3.flags), state);
1481 siphash24_compress(&rr->nsec3.iterations, sizeof(rr->nsec3.iterations), state);
1482 siphash24_compress(rr->nsec3.salt, rr->nsec3.salt_size, state);
1483 siphash24_compress(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, state);
1484 /* FIXME: We leave the bitmaps out */
1485 break;
1486
1487 case DNS_TYPE_TLSA:
1488 siphash24_compress(&rr->tlsa.cert_usage, sizeof(rr->tlsa.cert_usage), state);
1489 siphash24_compress(&rr->tlsa.selector, sizeof(rr->tlsa.selector), state);
1490 siphash24_compress(&rr->tlsa.matching_type, sizeof(rr->tlsa.matching_type), state);
1491 siphash24_compress(rr->tlsa.data, rr->tlsa.data_size, state);
1492 break;
1493
1494 case DNS_TYPE_CAA:
1495 siphash24_compress(&rr->caa.flags, sizeof(rr->caa.flags), state);
1496 string_hash_func(rr->caa.tag, state);
1497 siphash24_compress(rr->caa.value, rr->caa.value_size, state);
1498 break;
1499
1500 case DNS_TYPE_OPENPGPKEY:
1501 default:
1502 siphash24_compress(rr->generic.data, rr->generic.data_size, state);
1503 break;
1504 }
1505}
1506
1507static int dns_resource_record_compare_func(const void *a, const void *b) {
1508 const DnsResourceRecord *x = a, *y = b;
1509 int ret;
1510
1511 ret = dns_resource_key_compare_func(x->key, y->key);
1512 if (ret != 0)
1513 return ret;
1514
1515 if (dns_resource_record_equal(x, y))
1516 return 0;
1517
1518 /* This is a bit dirty, we don't implement proper ordering, but
1519 * the hashtable doesn't need ordering anyway, hence we don't
1520 * care. */
1521 return x < y ? -1 : 1;
1522}
1523
1524const struct hash_ops dns_resource_record_hash_ops = {
1525 .hash = dns_resource_record_hash_func,
1526 .compare = dns_resource_record_compare_func,
1527};
1528
1529DnsResourceRecord *dns_resource_record_copy(DnsResourceRecord *rr) {
1530 _cleanup_(dns_resource_record_unrefp)__attribute__((cleanup(dns_resource_record_unrefp))) DnsResourceRecord *copy = NULL((void*)0);
1531 DnsResourceRecord *t;
1532
1533 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1533, __PRETTY_FUNCTION__); } while (0);
1534
1535 copy = dns_resource_record_new(rr->key);
1536 if (!copy)
1537 return NULL((void*)0);
1538
1539 copy->ttl = rr->ttl;
1540 copy->expiry = rr->expiry;
1541 copy->n_skip_labels_signer = rr->n_skip_labels_signer;
1542 copy->n_skip_labels_source = rr->n_skip_labels_source;
1543 copy->unparseable = rr->unparseable;
1544
1545 switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
1546
1547 case DNS_TYPE_SRV:
1548 copy->srv.priority = rr->srv.priority;
1549 copy->srv.weight = rr->srv.weight;
1550 copy->srv.port = rr->srv.port;
1551 copy->srv.name = strdup(rr->srv.name);
1552 if (!copy->srv.name)
1553 return NULL((void*)0);
1554 break;
1555
1556 case DNS_TYPE_PTR:
1557 case DNS_TYPE_NS:
1558 case DNS_TYPE_CNAME:
1559 case DNS_TYPE_DNAME:
1560 copy->ptr.name = strdup(rr->ptr.name);
1561 if (!copy->ptr.name)
1562 return NULL((void*)0);
1563 break;
1564
1565 case DNS_TYPE_HINFO:
1566 copy->hinfo.cpu = strdup(rr->hinfo.cpu);
1567 if (!copy->hinfo.cpu)
1568 return NULL((void*)0);
1569
1570 copy->hinfo.os = strdup(rr->hinfo.os);
1571 if (!copy->hinfo.os)
1572 return NULL((void*)0);
1573 break;
1574
1575 case DNS_TYPE_TXT:
1576 case DNS_TYPE_SPF:
1577 copy->txt.items = dns_txt_item_copy(rr->txt.items);
1578 if (!copy->txt.items)
1579 return NULL((void*)0);
1580 break;
1581
1582 case DNS_TYPE_A:
1583 copy->a = rr->a;
1584 break;
1585
1586 case DNS_TYPE_AAAA:
1587 copy->aaaa = rr->aaaa;
1588 break;
1589
1590 case DNS_TYPE_SOA:
1591 copy->soa.mname = strdup(rr->soa.mname);
1592 if (!copy->soa.mname)
1593 return NULL((void*)0);
1594 copy->soa.rname = strdup(rr->soa.rname);
1595 if (!copy->soa.rname)
1596 return NULL((void*)0);
1597 copy->soa.serial = rr->soa.serial;
1598 copy->soa.refresh = rr->soa.refresh;
1599 copy->soa.retry = rr->soa.retry;
1600 copy->soa.expire = rr->soa.expire;
1601 copy->soa.minimum = rr->soa.minimum;
1602 break;
1603
1604 case DNS_TYPE_MX:
1605 copy->mx.priority = rr->mx.priority;
1606 copy->mx.exchange = strdup(rr->mx.exchange);
1607 if (!copy->mx.exchange)
1608 return NULL((void*)0);
1609 break;
1610
1611 case DNS_TYPE_LOC:
1612 copy->loc = rr->loc;
1613 break;
1614
1615 case DNS_TYPE_SSHFP:
1616 copy->sshfp.algorithm = rr->sshfp.algorithm;
1617 copy->sshfp.fptype = rr->sshfp.fptype;
1618 copy->sshfp.fingerprint = memdup(rr->sshfp.fingerprint, rr->sshfp.fingerprint_size);
1619 if (!copy->sshfp.fingerprint)
1620 return NULL((void*)0);
1621 copy->sshfp.fingerprint_size = rr->sshfp.fingerprint_size;
1622 break;
1623
1624 case DNS_TYPE_DNSKEY:
1625 copy->dnskey.flags = rr->dnskey.flags;
1626 copy->dnskey.protocol = rr->dnskey.protocol;
1627 copy->dnskey.algorithm = rr->dnskey.algorithm;
1628 copy->dnskey.key = memdup(rr->dnskey.key, rr->dnskey.key_size);
1629 if (!copy->dnskey.key)
1630 return NULL((void*)0);
1631 copy->dnskey.key_size = rr->dnskey.key_size;
1632 break;
1633
1634 case DNS_TYPE_RRSIG:
1635 copy->rrsig.type_covered = rr->rrsig.type_covered;
1636 copy->rrsig.algorithm = rr->rrsig.algorithm;
1637 copy->rrsig.labels = rr->rrsig.labels;
1638 copy->rrsig.original_ttl = rr->rrsig.original_ttl;
1639 copy->rrsig.expiration = rr->rrsig.expiration;
1640 copy->rrsig.inception = rr->rrsig.inception;
1641 copy->rrsig.key_tag = rr->rrsig.key_tag;
1642 copy->rrsig.signer = strdup(rr->rrsig.signer);
1643 if (!copy->rrsig.signer)
1644 return NULL((void*)0);
1645 copy->rrsig.signature = memdup(rr->rrsig.signature, rr->rrsig.signature_size);
1646 if (!copy->rrsig.signature)
1647 return NULL((void*)0);
1648 copy->rrsig.signature_size = rr->rrsig.signature_size;
1649 break;
1650
1651 case DNS_TYPE_NSEC:
1652 copy->nsec.next_domain_name = strdup(rr->nsec.next_domain_name);
1653 if (!copy->nsec.next_domain_name)
1654 return NULL((void*)0);
1655 copy->nsec.types = bitmap_copy(rr->nsec.types);
1656 if (!copy->nsec.types)
1657 return NULL((void*)0);
1658 break;
1659
1660 case DNS_TYPE_DS:
1661 copy->ds.key_tag = rr->ds.key_tag;
1662 copy->ds.algorithm = rr->ds.algorithm;
1663 copy->ds.digest_type = rr->ds.digest_type;
1664 copy->ds.digest = memdup(rr->ds.digest, rr->ds.digest_size);
1665 if (!copy->ds.digest)
1666 return NULL((void*)0);
1667 copy->ds.digest_size = rr->ds.digest_size;
1668 break;
1669
1670 case DNS_TYPE_NSEC3:
1671 copy->nsec3.algorithm = rr->nsec3.algorithm;
1672 copy->nsec3.flags = rr->nsec3.flags;
1673 copy->nsec3.iterations = rr->nsec3.iterations;
1674 copy->nsec3.salt = memdup(rr->nsec3.salt, rr->nsec3.salt_size);
1675 if (!copy->nsec3.salt)
1676 return NULL((void*)0);
1677 copy->nsec3.salt_size = rr->nsec3.salt_size;
1678 copy->nsec3.next_hashed_name = memdup(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size);
1679 if (!copy->nsec3.next_hashed_name_size)
1680 return NULL((void*)0);
1681 copy->nsec3.next_hashed_name_size = rr->nsec3.next_hashed_name_size;
1682 copy->nsec3.types = bitmap_copy(rr->nsec3.types);
1683 if (!copy->nsec3.types)
1684 return NULL((void*)0);
1685 break;
1686
1687 case DNS_TYPE_TLSA:
1688 copy->tlsa.cert_usage = rr->tlsa.cert_usage;
1689 copy->tlsa.selector = rr->tlsa.selector;
1690 copy->tlsa.matching_type = rr->tlsa.matching_type;
1691 copy->tlsa.data = memdup(rr->tlsa.data, rr->tlsa.data_size);
1692 if (!copy->tlsa.data)
1693 return NULL((void*)0);
1694 copy->tlsa.data_size = rr->tlsa.data_size;
1695 break;
1696
1697 case DNS_TYPE_CAA:
1698 copy->caa.flags = rr->caa.flags;
1699 copy->caa.tag = strdup(rr->caa.tag);
1700 if (!copy->caa.tag)
1701 return NULL((void*)0);
1702 copy->caa.value = memdup(rr->caa.value, rr->caa.value_size);
1703 if (!copy->caa.value)
1704 return NULL((void*)0);
1705 copy->caa.value_size = rr->caa.value_size;
1706 break;
1707
1708 case DNS_TYPE_OPT:
1709 default:
1710 copy->generic.data = memdup(rr->generic.data, rr->generic.data_size);
1711 if (!copy->generic.data)
1712 return NULL((void*)0);
1713 copy->generic.data_size = rr->generic.data_size;
1714 break;
1715 }
1716
1717 t = TAKE_PTR(copy)({ typeof(copy) _ptr_ = (copy); (copy) = ((void*)0); _ptr_; }
);
1718
1719 return t;
1720}
1721
1722int dns_resource_record_clamp_ttl(DnsResourceRecord **rr, uint32_t max_ttl) {
1723 DnsResourceRecord *old_rr, *new_rr;
1724 uint32_t new_ttl;
1725
1726 assert(rr)do { if ((__builtin_expect(!!(!(rr)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("rr"), "../src/resolve/resolved-dns-rr.c"
, 1726, __PRETTY_FUNCTION__); } while (0);
1727 old_rr = *rr;
1728
1729 if (old_rr->key->type == DNS_TYPE_OPT)
1730 return -EINVAL22;
1731
1732 new_ttl = MIN(old_rr->ttl, max_ttl)__extension__ ({ const typeof((old_rr->ttl)) __unique_prefix_A25
= ((old_rr->ttl)); const typeof((max_ttl)) __unique_prefix_B26
= ((max_ttl)); __unique_prefix_A25 < __unique_prefix_B26 ?
__unique_prefix_A25 : __unique_prefix_B26; });
1733 if (new_ttl == old_rr->ttl)
1734 return 0;
1735
1736 if (old_rr->n_ref == 1) {
1737 /* Patch in place */
1738 old_rr->ttl = new_ttl;
1739 return 1;
1740 }
1741
1742 new_rr = dns_resource_record_copy(old_rr);
1743 if (!new_rr)
1744 return -ENOMEM12;
1745
1746 new_rr->ttl = new_ttl;
1747
1748 dns_resource_record_unref(*rr);
1749 *rr = new_rr;
1750
1751 return 1;
1752}
1753
1754DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) {
1755 DnsTxtItem *n;
1756
1757 if (!i)
1758 return NULL((void*)0);
1759
1760 n = i->items_next;
1761
1762 free(i);
1763 return dns_txt_item_free_all(n);
1764}
1765
1766bool_Bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) {
1767
1768 if (a == b)
1769 return true1;
1770
1771 if (!a != !b)
1772 return false0;
1773
1774 if (!a)
1775 return true1;
1776
1777 if (a->length != b->length)
1778 return false0;
1779
1780 if (memcmp(a->data, b->data, a->length) != 0)
1781 return false0;
1782
1783 return dns_txt_item_equal(a->items_next, b->items_next);
1784}
1785
1786DnsTxtItem *dns_txt_item_copy(DnsTxtItem *first) {
1787 DnsTxtItem *i, *copy = NULL((void*)0), *end = NULL((void*)0);
1788
1789 LIST_FOREACH(items, i, first)for ((i) = (first); (i); (i) = (i)->items_next) {
1790 DnsTxtItem *j;
1791
1792 j = memdup(i, offsetof(DnsTxtItem, data)__builtin_offsetof(DnsTxtItem, data) + i->length + 1);
1793 if (!j) {
1794 dns_txt_item_free_all(copy);
1795 return NULL((void*)0);
1796 }
1797
1798 LIST_INSERT_AFTER(items, copy, end, j)do { typeof(*(copy)) **_head = &(copy), *_a = (end), *_b =
(j); do { if ((__builtin_expect(!!(!(_b)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("_b"), "../src/resolve/resolved-dns-rr.c"
, 1798, __PRETTY_FUNCTION__); } while (0); if (!_a) { if ((_b
->items_next = *_head)) _b->items_next->items_prev =
_b; _b->items_prev = ((void*)0); *_head = _b; } else { if
((_b->items_next = _a->items_next)) _b->items_next->
items_prev = _b; _b->items_prev = _a; _a->items_next = _b
; } } while (0);
1799 end = j;
1800 }
1801
1802 return copy;
1803}
1804
1805int dns_txt_item_new_empty(DnsTxtItem **ret) {
1806 DnsTxtItem *i;
1807
1808 /* RFC 6763, section 6.1 suggests to treat
1809 * empty TXT RRs as equivalent to a TXT record
1810 * with a single empty string. */
1811
1812 i = malloc0(offsetof(DnsTxtItem, data) + 1)(calloc(1, (__builtin_offsetof(DnsTxtItem, data) + 1))); /* for safety reasons we add an extra NUL byte */
1813 if (!i)
1814 return -ENOMEM12;
1815
1816 *ret = i;
1817
1818 return 0;
1819}
1820
1821static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = {
1822 /* Mnemonics as listed on https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */
1823 [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5",
1824 [DNSSEC_ALGORITHM_DH] = "DH",
1825 [DNSSEC_ALGORITHM_DSA] = "DSA",
1826 [DNSSEC_ALGORITHM_ECC] = "ECC",
1827 [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1",
1828 [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1] = "DSA-NSEC3-SHA1",
1829 [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1",
1830 [DNSSEC_ALGORITHM_RSASHA256] = "RSASHA256",
1831 [DNSSEC_ALGORITHM_RSASHA512] = "RSASHA512",
1832 [DNSSEC_ALGORITHM_ECC_GOST] = "ECC-GOST",
1833 [DNSSEC_ALGORITHM_ECDSAP256SHA256] = "ECDSAP256SHA256",
1834 [DNSSEC_ALGORITHM_ECDSAP384SHA384] = "ECDSAP384SHA384",
1835 [DNSSEC_ALGORITHM_ED25519] = "ED25519",
1836 [DNSSEC_ALGORITHM_ED448] = "ED448",
1837 [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT",
1838 [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS",
1839 [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID",
1840};
1841DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_algorithm, int, 255)int dnssec_algorithm_to_string_alloc(int i, char **str) { char
*s; if (i < 0 || i > 255) return -34; if (i < (int)
__extension__ (__builtin_choose_expr( !__builtin_types_compatible_p
(typeof(dnssec_algorithm_table), typeof(&*(dnssec_algorithm_table
))), sizeof(dnssec_algorithm_table)/sizeof((dnssec_algorithm_table
)[0]), ((void)0)))) { s = strdup(dnssec_algorithm_table[i]); if
(!s) return -12; } else { if (asprintf(&s, "%i", i) <
0) return -12; } *str = s; return 0; } int dnssec_algorithm_from_string
(const char *s) { int i; unsigned u = 0; if (!s) return (int)
-1; for (i = 0; i < (int) __extension__ (__builtin_choose_expr
( !__builtin_types_compatible_p(typeof(dnssec_algorithm_table
), typeof(&*(dnssec_algorithm_table))), sizeof(dnssec_algorithm_table
)/sizeof((dnssec_algorithm_table)[0]), ((void)0))); i++) if (
streq_ptr(dnssec_algorithm_table[i], s)) return i; if (safe_atou
(s, &u) >= 0 && u <= 255) return (int) u; return
(int) -1; };
10
←
Taking false branch
→
11
←
Assuming the condition is true
→
12
←
Taking true branch
→
13
←
Memory is allocated
→
14
←
Assuming 's' is non-null
→
15
←
Taking false branch
→
1842
1843static const char* const dnssec_digest_table[_DNSSEC_DIGEST_MAX_DEFINED] = {
1844 /* Names as listed on https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml */
1845 [DNSSEC_DIGEST_SHA1] = "SHA-1",
1846 [DNSSEC_DIGEST_SHA256] = "SHA-256",
1847 [DNSSEC_DIGEST_GOST_R_34_11_94] = "GOST_R_34.11-94",
1848 [DNSSEC_DIGEST_SHA384] = "SHA-384",
1849};
1850DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(dnssec_digest, int, 255)int dnssec_digest_to_string_alloc(int i, char **str) { char *
s; if (i < 0 || i > 255) return -34; if (i < (int) __extension__
(__builtin_choose_expr( !__builtin_types_compatible_p(typeof
(dnssec_digest_table), typeof(&*(dnssec_digest_table))), sizeof
(dnssec_digest_table)/sizeof((dnssec_digest_table)[0]), ((void
)0)))) { s = strdup(dnssec_digest_table[i]); if (!s) return -
12; } else { if (asprintf(&s, "%i", i) < 0) return -12
; } *str = s; return 0; } int dnssec_digest_from_string(const
char *s) { int i; unsigned u = 0; if (!s) return (int) -1; for
(i = 0; i < (int) __extension__ (__builtin_choose_expr( !
__builtin_types_compatible_p(typeof(dnssec_digest_table), typeof
(&*(dnssec_digest_table))), sizeof(dnssec_digest_table)/sizeof
((dnssec_digest_table)[0]), ((void)0))); i++) if (streq_ptr(dnssec_digest_table
[i], s)) return i; if (safe_atou(s, &u) >= 0 &&
u <= 255) return (int) u; return (int) -1; };