ldns  1.8.3
/build/ldns-rc5ieH/ldns-1.8.3/wire2host.c
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1/*
2 * wire2host.c
3 *
4 * conversion routines from the wire to the host
5 * format.
6 * This will usually just a re-ordering of the
7 * data (as we store it in network format)
8 *
9 * a Net::DNS like library for C
10 *
11 * (c) NLnet Labs, 2004-2006
12 *
13 * See the file LICENSE for the license
14 */
15
16
17#include <ldns/config.h>
18
19#include <ldns/ldns.h>
20/*#include <ldns/wire2host.h>*/
21
22#include <strings.h>
23#include <limits.h>
24
25
26
27/*
28 * Set of macro's to deal with the dns message header as specified
29 * in RFC1035 in portable way.
30 *
31 */
32
33/*
34 *
35 * 1 1 1 1 1 1
36 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
37 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
38 * | ID |
39 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
40 * |QR| Opcode |AA|TC|RD|RA| Z|AD|CD| RCODE |
41 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
42 * | QDCOUNT |
43 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
44 * | ANCOUNT |
45 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
46 * | NSCOUNT |
47 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
48 * | ARCOUNT |
49 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
50 *
51 */
52
53
54/* allocates memory to *dname! */
56ldns_wire2dname(ldns_rdf **dname, const uint8_t *wire, size_t max, size_t *pos)
57{
58 uint8_t label_size;
59 uint16_t pointer_target;
60 uint8_t pointer_target_buf[2];
61 size_t dname_pos = 0;
62 size_t uncompressed_length = 0;
63 size_t compression_pos = 0;
64 uint8_t tmp_dname[LDNS_MAX_DOMAINLEN];
65 unsigned int pointer_count = 0;
66
67 if (pos == NULL) {
69 }
70 if (*pos >= max) {
72 }
73 label_size = wire[*pos];
74 while (label_size > 0) {
75 /* compression */
76 while (label_size >= 192) {
77 if (compression_pos == 0) {
78 compression_pos = *pos + 2;
79 }
80
81 pointer_count++;
82
83 /* remove first two bits */
84 if (*pos + 2 > max) {
86 }
87 pointer_target_buf[0] = wire[*pos] & 63;
88 pointer_target_buf[1] = wire[*pos + 1];
89 pointer_target = ldns_read_uint16(pointer_target_buf);
90
91 if (pointer_target == 0) {
93 } else if (pointer_target >= max) {
95 } else if (pointer_count > LDNS_MAX_POINTERS) {
97 }
98 *pos = pointer_target;
99 label_size = wire[*pos];
100 }
101 if(label_size == 0)
102 break; /* break from pointer to 0 byte */
103 if (label_size > LDNS_MAX_LABELLEN) {
105 }
106 if (*pos + 1 + label_size > max) {
108 }
109
110 /* check space for labelcount itself */
111 if (dname_pos + 1 > LDNS_MAX_DOMAINLEN) {
113 }
114 tmp_dname[dname_pos] = label_size;
115 if (label_size > 0) {
116 dname_pos++;
117 }
118 *pos = *pos + 1;
119 if (dname_pos + label_size > LDNS_MAX_DOMAINLEN) {
121 }
122 memcpy(&tmp_dname[dname_pos], &wire[*pos], label_size);
123 uncompressed_length += label_size + 1;
124 dname_pos += label_size;
125 *pos = *pos + label_size;
126
127 if (*pos < max) {
128 label_size = wire[*pos];
129 }
130 }
131
132 if (compression_pos > 0) {
133 *pos = compression_pos;
134 } else {
135 *pos = *pos + 1;
136 }
137
138 if (dname_pos >= LDNS_MAX_DOMAINLEN) {
140 }
141
142 tmp_dname[dname_pos] = 0;
143 dname_pos++;
144
146 (uint16_t) dname_pos, tmp_dname);
147 if (!*dname) {
148 return LDNS_STATUS_MEM_ERR;
149 }
150 return LDNS_STATUS_OK;
151}
152
153/* maybe make this a goto error so data can be freed or something/ */
154#define LDNS_STATUS_CHECK_RETURN(st) {if (st != LDNS_STATUS_OK) { return st; }}
155#define LDNS_STATUS_CHECK_GOTO(st, label) {if (st != LDNS_STATUS_OK) { /*printf("STG %s:%d: status code %d\n", __FILE__, __LINE__, st);*/ goto label; }}
156
158ldns_wire2rdf(ldns_rr *rr, const uint8_t *wire, size_t max, size_t *pos)
159{
160 size_t end;
161 size_t cur_rdf_length;
162 uint8_t rdf_index;
163 uint8_t *data;
164 uint16_t rd_length;
165 ldns_rdf *cur_rdf = NULL;
166 ldns_rdf_type cur_rdf_type;
167 const ldns_rr_descriptor *descriptor;
168 ldns_status status;
169
170 assert(rr != NULL);
171
172 descriptor = ldns_rr_descript(ldns_rr_get_type(rr));
173
174 if (*pos + 2 > max) {
176 }
177
178 rd_length = ldns_read_uint16(&wire[*pos]);
179 *pos = *pos + 2;
180
181 if (*pos + rd_length > max) {
183 }
184
185 end = *pos + (size_t) rd_length;
186
187 rdf_index = 0;
188 while (*pos < end &&
189 rdf_index < ldns_rr_descriptor_maximum(descriptor)) {
190
191 cur_rdf_length = 0;
192
193 cur_rdf_type = ldns_rr_descriptor_field_type(
194 descriptor, rdf_index);
195
196 /* handle special cases immediately, set length
197 for fixed length rdata and do them below */
198 switch (cur_rdf_type) {
200 status = ldns_wire2dname(&cur_rdf, wire, max, pos);
202 break;
209 cur_rdf_length = LDNS_RDF_SIZE_BYTE;
210 break;
214 cur_rdf_length = LDNS_RDF_SIZE_WORD;
215 break;
218 case LDNS_RDF_TYPE_A:
220 cur_rdf_length = LDNS_RDF_SIZE_DOUBLEWORD;
221 break;
224 cur_rdf_length = LDNS_RDF_SIZE_6BYTES;
225 break;
228 cur_rdf_length = LDNS_RDF_SIZE_8BYTES;
229 break;
231 cur_rdf_length = LDNS_RDF_SIZE_16BYTES;
232 break;
236 /* len is stored in first byte
237 * it should be in the rdf too, so just
238 * copy len+1 from this position
239 */
240 cur_rdf_length = ((size_t) wire[*pos]) + 1;
241 break;
242
244 if (*pos + 2 > end) {
246 }
247 cur_rdf_length =
248 (size_t) ldns_read_uint16(&wire[*pos]) + 2;
249 break;
251 if (*pos + 4 > end) {
253 }
254 cur_rdf_length =
255 (size_t) wire[*pos] +
256 (size_t) ldns_read_uint16(&wire[*pos + 2]) + 4;
257 break;
260 /* length is stored in first byte */
261 cur_rdf_length = ((size_t) wire[*pos]) + 1;
262 break;
278 /*
279 * Read to end of rr rdata
280 */
281 cur_rdf_length = end - *pos;
282 break;
283 }
284
285 /* fixed length rdata */
286 if (cur_rdf_length > 0) {
287 if (cur_rdf_length + *pos > end) {
289 }
290 data = LDNS_XMALLOC(uint8_t, rd_length);
291 if (!data) {
292 return LDNS_STATUS_MEM_ERR;
293 }
294 memcpy(data, &wire[*pos], cur_rdf_length);
295
296 cur_rdf = ldns_rdf_new(cur_rdf_type,
297 cur_rdf_length, data);
298 *pos = *pos + cur_rdf_length;
299 }
300
301 if (cur_rdf) {
302 ldns_rr_push_rdf(rr, cur_rdf);
303 cur_rdf = NULL;
304 }
305
306 rdf_index++;
307
308 } /* while (rdf_index < ldns_rr_descriptor_maximum(descriptor)) */
309
310
311 return LDNS_STATUS_OK;
312}
313
314/* TODO:
315 can *pos be incremented at READ_INT? or maybe use something like
316 RR_CLASS(wire)?
317 uhhm Jelte??
318*/
320ldns_wire2rr(ldns_rr **rr_p, const uint8_t *wire, size_t max,
321 size_t *pos, ldns_pkt_section section)
322{
323 ldns_rdf *owner = NULL;
324 ldns_rr *rr = ldns_rr_new();
325 ldns_status status;
326
327 status = ldns_wire2dname(&owner, wire, max, pos);
328 LDNS_STATUS_CHECK_GOTO(status, status_error);
329
330 ldns_rr_set_owner(rr, owner);
331
332 if (*pos + 4 > max) {
334 goto status_error;
335 }
336
337 ldns_rr_set_type(rr, ldns_read_uint16(&wire[*pos]));
338 *pos = *pos + 2;
339
340 ldns_rr_set_class(rr, ldns_read_uint16(&wire[*pos]));
341 *pos = *pos + 2;
342
343 if (section != LDNS_SECTION_QUESTION) {
344 if (*pos + 4 > max) {
346 goto status_error;
347 }
348 ldns_rr_set_ttl(rr, ldns_read_uint32(&wire[*pos]));
349
350 *pos = *pos + 4;
351 status = ldns_wire2rdf(rr, wire, max, pos);
352
353 LDNS_STATUS_CHECK_GOTO(status, status_error);
354 ldns_rr_set_question(rr, false);
355 } else {
356 ldns_rr_set_question(rr, true);
357 }
358
359 *rr_p = rr;
360 return LDNS_STATUS_OK;
361
362status_error:
363 ldns_rr_free(rr);
364 return status;
365}
366
367static ldns_status
368ldns_wire2pkt_hdr(ldns_pkt *packet, const uint8_t *wire, size_t max, size_t *pos)
369{
370 if (*pos + LDNS_HEADER_SIZE > max) {
372 } else {
373 ldns_pkt_set_id(packet, LDNS_ID_WIRE(wire));
374 ldns_pkt_set_qr(packet, LDNS_QR_WIRE(wire));
376 ldns_pkt_set_aa(packet, LDNS_AA_WIRE(wire));
377 ldns_pkt_set_tc(packet, LDNS_TC_WIRE(wire));
378 ldns_pkt_set_rd(packet, LDNS_RD_WIRE(wire));
379 ldns_pkt_set_ra(packet, LDNS_RA_WIRE(wire));
380 ldns_pkt_set_ad(packet, LDNS_AD_WIRE(wire));
381 ldns_pkt_set_cd(packet, LDNS_CD_WIRE(wire));
382 ldns_pkt_set_rcode(packet, LDNS_RCODE_WIRE(wire));
383
384 ldns_pkt_set_qdcount(packet, LDNS_QDCOUNT(wire));
385 ldns_pkt_set_ancount(packet, LDNS_ANCOUNT(wire));
386 ldns_pkt_set_nscount(packet, LDNS_NSCOUNT(wire));
387 ldns_pkt_set_arcount(packet, LDNS_ARCOUNT(wire));
388
389 *pos += LDNS_HEADER_SIZE;
390
391 return LDNS_STATUS_OK;
392 }
393}
394
397{
398 /* lazy */
399 return ldns_wire2pkt(packet, ldns_buffer_begin(buffer),
400 ldns_buffer_limit(buffer));
401
402}
403
405ldns_wire2pkt(ldns_pkt **packet_p, const uint8_t *wire, size_t max)
406{
407 size_t pos = 0;
408 uint16_t i;
409 ldns_rr *rr;
410 ldns_pkt *packet = ldns_pkt_new();
412 uint8_t have_edns = 0;
413
414 uint8_t data[4];
415
416 if (!packet) {
417 return LDNS_STATUS_MEM_ERR;
418 }
419
420 status = ldns_wire2pkt_hdr(packet, wire, max, &pos);
421 LDNS_STATUS_CHECK_GOTO(status, status_error);
422
423 for (i = 0; i < ldns_pkt_qdcount(packet); i++) {
424
425 status = ldns_wire2rr(&rr, wire, max, &pos, LDNS_SECTION_QUESTION);
426 if (status == LDNS_STATUS_PACKET_OVERFLOW) {
428 }
429 LDNS_STATUS_CHECK_GOTO(status, status_error);
430 if (!ldns_rr_list_push_rr(ldns_pkt_question(packet), rr)) {
431 ldns_pkt_free(packet);
433 }
434 }
435 for (i = 0; i < ldns_pkt_ancount(packet); i++) {
436 status = ldns_wire2rr(&rr, wire, max, &pos, LDNS_SECTION_ANSWER);
437 if (status == LDNS_STATUS_PACKET_OVERFLOW) {
439 }
440 LDNS_STATUS_CHECK_GOTO(status, status_error);
441 if (!ldns_rr_list_push_rr(ldns_pkt_answer(packet), rr)) {
442 ldns_pkt_free(packet);
444 }
445 }
446 for (i = 0; i < ldns_pkt_nscount(packet); i++) {
447 status = ldns_wire2rr(&rr, wire, max, &pos, LDNS_SECTION_AUTHORITY);
448 if (status == LDNS_STATUS_PACKET_OVERFLOW) {
450 }
451 LDNS_STATUS_CHECK_GOTO(status, status_error);
452 if (!ldns_rr_list_push_rr(ldns_pkt_authority(packet), rr)) {
453 ldns_pkt_free(packet);
455 }
456 }
457 for (i = 0; i < ldns_pkt_arcount(packet); i++) {
458 status = ldns_wire2rr(&rr, wire, max, &pos, LDNS_SECTION_ADDITIONAL);
459 if (status == LDNS_STATUS_PACKET_OVERFLOW) {
461 }
462 LDNS_STATUS_CHECK_GOTO(status, status_error);
463
466 ldns_write_uint32(data, ldns_rr_ttl(rr));
467 ldns_pkt_set_edns_extended_rcode(packet, data[0]);
468 ldns_pkt_set_edns_version(packet, data[1]);
469 ldns_pkt_set_edns_z(packet, ldns_read_uint16(&data[2]));
470 /* edns might not have rdfs */
471 if (ldns_rr_rdf(rr, 0)) {
474 }
475 ldns_rr_free(rr);
476 have_edns += 1;
477 } else if (ldns_rr_get_type(rr) == LDNS_RR_TYPE_TSIG) {
478 ldns_pkt_set_tsig(packet, rr);
479 ldns_pkt_set_arcount(packet, ldns_pkt_arcount(packet) - 1);
480 } else if (!ldns_rr_list_push_rr(ldns_pkt_additional(packet), rr)) {
481 ldns_pkt_free(packet);
483 }
484 }
485 ldns_pkt_set_size(packet, max);
486 if(have_edns)
488 - have_edns);
489 packet->_edns_present = have_edns;
490
491 *packet_p = packet;
492 return status;
493
494status_error:
495 ldns_pkt_free(packet);
496 return status;
497}
@ LDNS_STATUS_WIRE_INCOMPLETE_QUESTION
Definition error.h:73
@ LDNS_STATUS_WIRE_RDATA_ERR
Definition error.h:125
@ LDNS_STATUS_WIRE_INCOMPLETE_ADDITIONAL
Definition error.h:76
@ LDNS_STATUS_WIRE_INCOMPLETE_HEADER
Definition error.h:72
@ LDNS_STATUS_LABEL_OVERFLOW
Definition error.h:28
@ LDNS_STATUS_MEM_ERR
Definition error.h:34
@ LDNS_STATUS_INTERNAL_ERR
Definition error.h:35
@ LDNS_STATUS_WIRE_INCOMPLETE_ANSWER
Definition error.h:74
@ LDNS_STATUS_INVALID_POINTER
Definition error.h:33
@ LDNS_STATUS_WIRE_INCOMPLETE_AUTHORITY
Definition error.h:75
@ LDNS_STATUS_OK
Definition error.h:26
@ LDNS_STATUS_PACKET_OVERFLOW
Definition error.h:32
@ LDNS_STATUS_DOMAINNAME_OVERFLOW
Definition error.h:29
enum ldns_enum_status ldns_status
Definition error.h:146
Including this file will include all ldns files, and define some lookup tables.
void ldns_pkt_free(ldns_pkt *packet)
frees the packet structure and all data that it contains.
Definition packet.c:895
void ldns_pkt_set_ad(ldns_pkt *p, signed char b)
Set the packet's ad bit.
void ldns_pkt_set_size(ldns_pkt *p, size_t s)
Set the packet's size.
Definition packet.c:606
void ldns_pkt_set_cd(ldns_pkt *p, signed char b)
Set the packet's cd bit.
void ldns_pkt_set_edns_udp_size(ldns_pkt *packet, uint16_t s)
Set the packet's edns udp size.
Definition packet.c:612
ldns_rr_list * ldns_pkt_additional(const ldns_pkt *p)
Return the packet's additional section.
Definition packet.c:142
ldns_rr_list * ldns_pkt_authority(const ldns_pkt *p)
Return the packet's authority section.
Definition packet.c:136
ldns_rr_list * ldns_pkt_question(const ldns_pkt *p)
Return the packet's question section.
Definition packet.c:124
void ldns_pkt_set_qr(ldns_pkt *p, signed char b)
Set the packet's qr bit.
uint16_t ldns_pkt_ancount(const ldns_pkt *p)
Return the packet's an count.
Definition packet.c:106
uint16_t ldns_pkt_nscount(const ldns_pkt *p)
Return the packet's ns count.
Definition packet.c:112
void ldns_pkt_set_aa(ldns_pkt *p, signed char b)
Set the packet's aa bit.
ldns_rr_list * ldns_pkt_answer(const ldns_pkt *p)
Return the packet's answer section.
Definition packet.c:130
void ldns_pkt_set_rd(ldns_pkt *p, signed char b)
Set the packet's rd bit.
ldns_pkt * ldns_pkt_new(void)
allocates and initializes a ldns_pkt structure.
Definition packet.c:841
void ldns_pkt_set_tc(ldns_pkt *p, signed char b)
Set the packet's tc bit.
void ldns_pkt_set_rcode(ldns_pkt *p, uint8_t c)
Set the packet's response code.
Definition packet.c:557
void ldns_pkt_set_edns_z(ldns_pkt *packet, uint16_t z)
Set the packet's edns z value.
Definition packet.c:630
enum ldns_enum_pkt_section ldns_pkt_section
Definition packet.h:287
ldns_rdf * ldns_pkt_edns_data(const ldns_pkt *packet)
return the packet's EDNS data
Definition packet.c:260
void ldns_pkt_set_qdcount(ldns_pkt *p, uint16_t c)
Set the packet's qd count.
Definition packet.c:563
uint16_t ldns_pkt_qdcount(const ldns_pkt *p)
Return the packet's qd count.
Definition packet.c:100
void ldns_pkt_set_edns_data(ldns_pkt *packet, ldns_rdf *data)
Set the packet's EDNS data.
Definition packet.c:636
void ldns_pkt_set_arcount(ldns_pkt *p, uint16_t c)
Set the packet's arcount.
Definition packet.c:581
void ldns_pkt_set_opcode(ldns_pkt *p, ldns_pkt_opcode c)
Set the packet's opcode.
Definition packet.c:551
uint16_t ldns_pkt_arcount(const ldns_pkt *p)
Return the packet's ar count.
Definition packet.c:118
void ldns_pkt_set_id(ldns_pkt *p, uint16_t id)
Set the packet's id.
Definition packet.c:471
void ldns_pkt_set_ancount(ldns_pkt *p, uint16_t c)
Set the packet's an count.
Definition packet.c:569
void ldns_pkt_set_ra(ldns_pkt *p, signed char b)
Set the packet's ra bit.
void ldns_pkt_set_tsig(ldns_pkt *p, ldns_rr *t)
Set the packet's tsig rr.
Definition packet.c:672
void ldns_pkt_set_edns_extended_rcode(ldns_pkt *packet, uint8_t c)
Set the packet's edns extended rcode.
Definition packet.c:618
@ LDNS_SECTION_QUESTION
Definition packet.h:278
@ LDNS_SECTION_ANSWER
Definition packet.h:279
@ LDNS_SECTION_ADDITIONAL
Definition packet.h:281
@ LDNS_SECTION_AUTHORITY
Definition packet.h:280
void ldns_pkt_set_nscount(ldns_pkt *p, uint16_t c)
Set the packet's ns count.
Definition packet.c:575
void ldns_pkt_set_edns_version(ldns_pkt *packet, uint8_t v)
Set the packet's edns version.
Definition packet.c:624
ldns_rdf * ldns_rdf_clone(const ldns_rdf *rd)
clones a rdf structure.
Definition rdata.c:222
ldns_rdf * ldns_rdf_new_frm_data(ldns_rdf_type type, size_t size, const void *data)
allocates a new rdf structure and fills it.
Definition rdata.c:193
#define LDNS_RDF_SIZE_WORD
Definition rdata.h:34
void ldns_rdf_deep_free(ldns_rdf *rd)
frees a rdf structure and frees the data.
Definition rdata.c:230
#define LDNS_RDF_SIZE_BYTE
Definition rdata.h:33
#define LDNS_RDF_SIZE_6BYTES
Definition rdata.h:36
#define LDNS_RDF_SIZE_16BYTES
Definition rdata.h:38
#define LDNS_RDF_SIZE_8BYTES
Definition rdata.h:37
@ LDNS_RDF_TYPE_INT32
32 bits
Definition rdata.h:56
@ LDNS_RDF_TYPE_TAG
A non-zero sequence of US-ASCII letters and numbers in lower case.
Definition rdata.h:126
@ LDNS_RDF_TYPE_NSAP
NSAP.
Definition rdata.h:103
@ LDNS_RDF_TYPE_HIP
Represents the Public Key Algorithm, HIT and Public Key fields for the HIP RR types.
Definition rdata.h:92
@ LDNS_RDF_TYPE_B32_EXT
b32 string
Definition rdata.h:66
@ LDNS_RDF_TYPE_NSEC3_NEXT_OWNER
nsec3 base32 string (with length byte on wire
Definition rdata.h:111
@ LDNS_RDF_TYPE_CERT_ALG
certificate algorithm
Definition rdata.h:78
@ LDNS_RDF_TYPE_EUI48
6 * 8 bit hex numbers separated by dashes.
Definition rdata.h:119
@ LDNS_RDF_TYPE_SERVICE
protocol and port bitmaps
Definition rdata.h:97
@ LDNS_RDF_TYPE_EUI64
8 * 8 bit hex numbers separated by dashes.
Definition rdata.h:121
@ LDNS_RDF_TYPE_PERIOD
period
Definition rdata.h:86
@ LDNS_RDF_TYPE_B64
b64 string
Definition rdata.h:68
@ LDNS_RDF_TYPE_AAAA
AAAA record.
Definition rdata.h:60
@ LDNS_RDF_TYPE_UNKNOWN
unknown types
Definition rdata.h:82
@ LDNS_RDF_TYPE_WKS
well known services
Definition rdata.h:101
@ LDNS_RDF_TYPE_DNAME
domain name
Definition rdata.h:50
@ LDNS_RDF_TYPE_TIME
time (32 bits)
Definition rdata.h:84
@ LDNS_RDF_TYPE_SVCPARAMS
draft-ietf-dnsop-svcb-https
Definition rdata.h:146
@ LDNS_RDF_TYPE_NSEC
nsec type codes
Definition rdata.h:72
@ LDNS_RDF_TYPE_SELECTOR
Definition rdata.h:139
@ LDNS_RDF_TYPE_NSEC3_SALT
nsec3 hash salt
Definition rdata.h:109
@ LDNS_RDF_TYPE_APL
apl data
Definition rdata.h:64
@ LDNS_RDF_TYPE_A
A record.
Definition rdata.h:58
@ LDNS_RDF_TYPE_LONG_STR
A <character-string> encoding of the value field as specified [RFC1035], Section 5....
Definition rdata.h:132
@ LDNS_RDF_TYPE_LOC
location data
Definition rdata.h:99
@ LDNS_RDF_TYPE_INT16_DATA
variable length any type rdata where the length is specified by the first 2 bytes
Definition rdata.h:95
@ LDNS_RDF_TYPE_ILNP64
4 shorts represented as 4 * 16 bit hex numbers separated by colons.
Definition rdata.h:116
@ LDNS_RDF_TYPE_ATMA
ATMA.
Definition rdata.h:105
@ LDNS_RDF_TYPE_HEX
hex string
Definition rdata.h:70
@ LDNS_RDF_TYPE_NONE
none
Definition rdata.h:48
@ LDNS_RDF_TYPE_CLASS
a class
Definition rdata.h:76
@ LDNS_RDF_TYPE_INT8
8 bits
Definition rdata.h:52
@ LDNS_RDF_TYPE_MATCHING_TYPE
Definition rdata.h:140
@ LDNS_RDF_TYPE_IPSECKEY
IPSECKEY.
Definition rdata.h:107
@ LDNS_RDF_TYPE_CERTIFICATE_USAGE
Since RFC7218 TLSA records can be given with mnemonics, hence these rdata field types.
Definition rdata.h:138
@ LDNS_RDF_TYPE_STR
txt string
Definition rdata.h:62
@ LDNS_RDF_TYPE_INT16
16 bits
Definition rdata.h:54
@ LDNS_RDF_TYPE_ALG
a key algorithm
Definition rdata.h:80
@ LDNS_RDF_TYPE_AMTRELAY
draft-ietf-mboned-driad-amt-discovery
Definition rdata.h:143
@ LDNS_RDF_TYPE_TSIGTIME
tsig time 48 bits
Definition rdata.h:88
@ LDNS_RDF_TYPE_TYPE
a RR type
Definition rdata.h:74
#define LDNS_RDF_SIZE_DOUBLEWORD
Definition rdata.h:35
ldns_rdf * ldns_rdf_new(ldns_rdf_type type, size_t size, void *data)
allocates a new rdf structure and fills it.
Definition rdata.c:179
enum ldns_enum_rdf_type ldns_rdf_type
Definition rdata.h:151
uint32_t ldns_rr_ttl(const ldns_rr *rr)
returns the ttl of an rr structure.
Definition rr.c:931
void ldns_rr_free(ldns_rr *rr)
frees an RR structure
Definition rr.c:81
void ldns_rr_set_owner(ldns_rr *rr, ldns_rdf *owner)
sets the owner in the rr structure.
Definition rr.c:804
#define LDNS_MAX_LABELLEN
Maximum length of a dname label.
Definition rr.h:31
ldns_rr * ldns_rr_new(void)
creates a new rr structure.
Definition rr.c:30
void ldns_rr_set_type(ldns_rr *rr, ldns_rr_type rr_type)
sets the type in the rr.
Definition rr.c:828
@ LDNS_RR_TYPE_OPT
OPT record RFC 6891.
Definition rr.h:160
@ LDNS_RR_TYPE_TSIG
Definition rr.h:214
signed char ldns_rr_list_push_rr(ldns_rr_list *rr_list, const ldns_rr *rr)
pushes an rr to an rrlist.
Definition rr.c:1132
ldns_rdf_type ldns_rr_descriptor_field_type(const ldns_rr_descriptor *descriptor, size_t field)
returns the rdf type for the given rdata field number of the rr type for the given descriptor.
Definition rr.c:2676
ldns_rdf * ldns_rr_rdf(const ldns_rr *rr, size_t nr)
returns the rdata field member counter.
Definition rr.c:909
ldns_rr_type ldns_rr_get_type(const ldns_rr *rr)
returns the type of the rr.
Definition rr.c:943
void ldns_rr_set_ttl(ldns_rr *rr, uint32_t ttl)
sets the ttl in the rr structure.
Definition rr.c:816
void ldns_rr_set_question(ldns_rr *rr, signed char question)
sets the question flag in the rr structure.
size_t ldns_rr_descriptor_maximum(const ldns_rr_descriptor *descriptor)
returns the maximum number of rdata fields of the rr type this descriptor describes.
Definition rr.c:2661
ldns_rr_class ldns_rr_get_class(const ldns_rr *rr)
returns the class of the rr.
Definition rr.c:949
#define LDNS_MAX_POINTERS
Maximum number of pointers in 1 dname.
Definition rr.h:35
void ldns_rr_set_class(ldns_rr *rr, ldns_rr_class rr_class)
sets the class in the rr.
Definition rr.c:834
signed char ldns_rr_push_rdf(ldns_rr *rr, const ldns_rdf *f)
sets rd_field member, it will be placed in the next available spot.
Definition rr.c:857
#define LDNS_MAX_DOMAINLEN
Maximum length of a complete dname.
Definition rr.h:33
const ldns_rr_descriptor * ldns_rr_descript(uint16_t type)
returns the resource record descriptor for the given rr type.
Definition rr.c:2632
implementation of buffers to ease operations
Definition buffer.h:51
DNS packet.
Definition packet.h:235
uint8_t _edns_present
Definition packet.h:256
Resource record data field.
Definition rdata.h:197
Contains all information about resource record types.
Definition rr.h:351
Resource Record.
Definition rr.h:310
#define LDNS_XMALLOC(type, count)
Definition util.h:51
ldns_status ldns_wire2dname(ldns_rdf **dname, const uint8_t *wire, size_t max, size_t *pos)
converts the data on the uint8_t bytearray (in wire format) to a DNS dname rdata field.
Definition wire2host.c:56
#define LDNS_STATUS_CHECK_RETURN(st)
Definition wire2host.c:154
ldns_status ldns_wire2rr(ldns_rr **rr_p, const uint8_t *wire, size_t max, size_t *pos, ldns_pkt_section section)
converts the data on the uint8_t bytearray (in wire format) to a DNS resource record.
Definition wire2host.c:320
ldns_status ldns_wire2rdf(ldns_rr *rr, const uint8_t *wire, size_t max, size_t *pos)
converts the data on the uint8_t bytearray (in wire format) to DNS rdata fields, and adds them to the...
Definition wire2host.c:158
#define LDNS_STATUS_CHECK_GOTO(st, label)
Definition wire2host.c:155
ldns_status ldns_buffer2pkt_wire(ldns_pkt **packet, const ldns_buffer *buffer)
converts the data in the ldns_buffer (in wire format) to a DNS packet.
Definition wire2host.c:396
ldns_status ldns_wire2pkt(ldns_pkt **packet_p, const uint8_t *wire, size_t max)
converts the data on the uint8_t bytearray (in wire format) to a DNS packet.
Definition wire2host.c:405
#define LDNS_OPCODE_WIRE(wirebuf)
Definition wire2host.h:55
#define LDNS_ID_WIRE(wirebuf)
Definition wire2host.h:97
#define LDNS_CD_WIRE(wirebuf)
Definition wire2host.h:74
#define LDNS_AD_WIRE(wirebuf)
Definition wire2host.h:80
#define LDNS_AA_WIRE(wirebuf)
Definition wire2host.h:49
#define LDNS_RCODE_WIRE(wirebuf)
Definition wire2host.h:68
#define LDNS_QDCOUNT(wirebuf)
Definition wire2host.h:102
#define LDNS_HEADER_SIZE
Definition wire2host.h:32
#define LDNS_RD_WIRE(wirebuf)
Definition wire2host.h:37
#define LDNS_RA_WIRE(wirebuf)
Definition wire2host.h:92
#define LDNS_NSCOUNT(wirebuf)
Definition wire2host.h:110
#define LDNS_ANCOUNT(wirebuf)
Definition wire2host.h:106
#define LDNS_ARCOUNT(wirebuf)
Definition wire2host.h:114
#define LDNS_QR_WIRE(wirebuf)
Definition wire2host.h:61
#define LDNS_TC_WIRE(wirebuf)
Definition wire2host.h:43