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! */
56 ldns_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 
158 ldns_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) {
199  case LDNS_RDF_TYPE_DNAME:
200  status = ldns_wire2dname(&cur_rdf, wire, max, pos);
201  LDNS_STATUS_CHECK_RETURN(status);
202  break;
203  case LDNS_RDF_TYPE_CLASS:
204  case LDNS_RDF_TYPE_ALG:
208  case LDNS_RDF_TYPE_INT8:
209  cur_rdf_length = LDNS_RDF_SIZE_BYTE;
210  break;
211  case LDNS_RDF_TYPE_TYPE:
212  case LDNS_RDF_TYPE_INT16:
214  cur_rdf_length = LDNS_RDF_SIZE_WORD;
215  break;
216  case LDNS_RDF_TYPE_TIME:
217  case LDNS_RDF_TYPE_INT32:
218  case LDNS_RDF_TYPE_A:
220  cur_rdf_length = LDNS_RDF_SIZE_DOUBLEWORD;
221  break;
223  case LDNS_RDF_TYPE_EUI48:
224  cur_rdf_length = LDNS_RDF_SIZE_6BYTES;
225  break;
227  case LDNS_RDF_TYPE_EUI64:
228  cur_rdf_length = LDNS_RDF_SIZE_8BYTES;
229  break;
230  case LDNS_RDF_TYPE_AAAA:
231  cur_rdf_length = LDNS_RDF_SIZE_16BYTES;
232  break;
233  case LDNS_RDF_TYPE_STR:
235  case LDNS_RDF_TYPE_TAG:
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;
250  case LDNS_RDF_TYPE_HIP:
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;
263  case LDNS_RDF_TYPE_APL:
264  case LDNS_RDF_TYPE_B64:
265  case LDNS_RDF_TYPE_HEX:
266  case LDNS_RDF_TYPE_NSEC:
269  case LDNS_RDF_TYPE_LOC:
270  case LDNS_RDF_TYPE_WKS:
271  case LDNS_RDF_TYPE_NSAP:
272  case LDNS_RDF_TYPE_ATMA:
277  case LDNS_RDF_TYPE_NONE:
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 */
320 ldns_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 
362 status_error:
363  ldns_rr_free(rr);
364  return status;
365 }
366 
367 static ldns_status
368 ldns_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));
375  ldns_pkt_set_opcode(packet, LDNS_OPCODE_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 
396 ldns_buffer2pkt_wire(ldns_pkt **packet, const ldns_buffer *buffer)
397 {
398  /* lazy */
399  return ldns_wire2pkt(packet, ldns_buffer_begin(buffer),
400  ldns_buffer_limit(buffer));
401 
402 }
403 
405 ldns_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();
411  ldns_status status = LDNS_STATUS_OK;
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 
464  if (ldns_rr_get_type(rr) == LDNS_RR_TYPE_OPT) {
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)
487  ldns_pkt_set_arcount(packet, ldns_pkt_arcount(packet)
488  - have_edns);
489  packet->_edns_present = have_edns;
490 
491  *packet_p = packet;
492  return status;
493 
494 status_error:
495  ldns_pkt_free(packet);
496  return status;
497 }
ldns_rdf * ldns_rr_rdf(const ldns_rr *rr, size_t nr)
returns the rdata field member counter.
Definition: rr.c:909
#define LDNS_RDF_SIZE_WORD
Definition: rdata.h:34
ldns_rdf * ldns_pkt_edns_data(const ldns_pkt *packet)
return the packet's EDNS data
Definition: packet.c:260
#define LDNS_RDF_SIZE_BYTE
Definition: rdata.h:33
#define LDNS_AA_WIRE(wirebuf)
Definition: wire2host.h:49
@ LDNS_STATUS_WIRE_INCOMPLETE_QUESTION
Definition: error.h:73
implementation of buffers to ease operations
Definition: buffer.h:50
@ LDNS_RDF_TYPE_MATCHING_TYPE
Definition: rdata.h:140
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
@ LDNS_RDF_TYPE_HEX
hex string
Definition: rdata.h:70
void ldns_pkt_set_qr(ldns_pkt *packet, bool qr)
Definition: packet.c:485
@ LDNS_RDF_TYPE_INT32
32 bits
Definition: rdata.h:56
#define LDNS_AD_WIRE(wirebuf)
Definition: wire2host.h:80
#define LDNS_ID_WIRE(wirebuf)
Definition: wire2host.h:97
@ LDNS_STATUS_WIRE_INCOMPLETE_AUTHORITY
Definition: error.h:75
#define LDNS_RDF_SIZE_DOUBLEWORD
Definition: rdata.h:35
Resource Record.
Definition: rr.h:309
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
#define LDNS_STATUS_CHECK_GOTO(st, label)
Definition: wire2host.c:155
@ LDNS_SECTION_QUESTION
Definition: packet.h:278
@ LDNS_RDF_TYPE_INT16
16 bits
Definition: rdata.h:54
ldns_rr_list * ldns_pkt_question(const ldns_pkt *packet)
Return the packet's question section.
Definition: packet.c:124
#define LDNS_STATUS_CHECK_RETURN(st)
Definition: wire2host.c:154
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_STATUS_OK
Definition: error.h:26
@ LDNS_RDF_TYPE_SVCPARAMS
draft-ietf-dnsop-svcb-https
Definition: rdata.h:146
void ldns_pkt_set_edns_z(ldns_pkt *packet, uint16_t z)
Set the packet's edns z value.
Definition: packet.c:630
@ LDNS_RDF_TYPE_NSAP
NSAP.
Definition: rdata.h:103
#define LDNS_NSCOUNT(wirebuf)
Definition: wire2host.h:110
@ LDNS_RDF_TYPE_LOC
location data
Definition: rdata.h:99
@ LDNS_RDF_TYPE_TAG
A non-zero sequence of US-ASCII letters and numbers in lower case.
Definition: rdata.h:126
bool 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_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
uint16_t ldns_pkt_qdcount(const ldns_pkt *packet)
Return the packet's qd count.
Definition: packet.c:100
void ldns_pkt_set_edns_version(ldns_pkt *packet, uint8_t v)
Set the packet's edns version.
Definition: packet.c:624
@ LDNS_RDF_TYPE_A
A record.
Definition: rdata.h:58
enum ldns_enum_rdf_type ldns_rdf_type
Definition: rdata.h:151
@ LDNS_STATUS_INVALID_POINTER
Definition: error.h:33
void ldns_pkt_set_cd(ldns_pkt *packet, bool cd)
Definition: packet.c:533
@ LDNS_STATUS_INTERNAL_ERR
Definition: error.h:35
@ LDNS_RDF_TYPE_NONE
none
Definition: rdata.h:48
@ LDNS_RR_TYPE_TSIG
Definition: rr.h:214
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_class(ldns_rr *rr, ldns_rr_class rr_class)
sets the class in the rr.
Definition: rr.c:834
void ldns_rr_set_question(ldns_rr *rr, bool question)
Definition: rr.c:810
#define LDNS_MAX_POINTERS
Maximum number of pointers in 1 dname.
Definition: rr.h:35
void ldns_pkt_set_tsig(ldns_pkt *pkt, ldns_rr *rr)
Set the packet's tsig rr.
Definition: packet.c:672
@ LDNS_SECTION_AUTHORITY
Definition: packet.h:280
uint8_t _edns_present
Definition: packet.h:256
@ LDNS_RDF_TYPE_CERT_ALG
certificate algorithm
Definition: rdata.h:78
ldns_rr * ldns_rr_new(void)
creates a new rr structure.
Definition: rr.c:30
#define LDNS_MAX_LABELLEN
Maximum length of a dname label.
Definition: rr.h:31
@ LDNS_RDF_TYPE_APL
apl data
Definition: rdata.h:64
@ LDNS_RR_TYPE_OPT
OPT record RFC 6891.
Definition: rr.h:160
void ldns_pkt_set_nscount(ldns_pkt *packet, uint16_t nscount)
Set the packet's ns count.
Definition: packet.c:575
@ 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 ldns_rr_descriptor_field_type(const ldns_rr_descriptor *descriptor, size_t index)
returns the rdf type for the given rdata field number of the rr type for the given descriptor.
Definition: rr.c:2676
#define LDNS_TC_WIRE(wirebuf)
Definition: wire2host.h:43
@ LDNS_STATUS_WIRE_RDATA_ERR
Definition: error.h:125
#define LDNS_QDCOUNT(wirebuf)
Definition: wire2host.h:102
ldns_rr_class ldns_rr_get_class(const ldns_rr *rr)
returns the class of the rr.
Definition: rr.c:949
@ LDNS_RDF_TYPE_SERVICE
protocol and port bitmaps
Definition: rdata.h:97
void ldns_rr_free(ldns_rr *rr)
frees an RR structure
Definition: rr.c:81
void ldns_pkt_free(ldns_pkt *packet)
frees the packet structure and all data that it contains.
Definition: packet.c:895
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
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
void ldns_pkt_set_size(ldns_pkt *packet, size_t s)
Set the packet's size.
Definition: packet.c:606
@ LDNS_STATUS_PACKET_OVERFLOW
Definition: error.h:32
@ LDNS_RDF_TYPE_ILNP64
4 shorts represented as 4 * 16 bit hex numbers separated by colons.
Definition: rdata.h:116
@ LDNS_STATUS_DOMAINNAME_OVERFLOW
Definition: error.h:29
void ldns_pkt_set_ad(ldns_pkt *packet, bool ad)
Definition: packet.c:545
@ LDNS_RDF_TYPE_ATMA
ATMA.
Definition: rdata.h:105
#define LDNS_HEADER_SIZE
Definition: wire2host.h:32
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
@ LDNS_STATUS_LABEL_OVERFLOW
Definition: error.h:28
ldns_rr_list * ldns_pkt_authority(const ldns_pkt *packet)
Return the packet's authority section.
Definition: packet.c:136
void ldns_rdf_deep_free(ldns_rdf *rd)
frees a rdf structure and frees the data.
Definition: rdata.c:230
ldns_rdf * ldns_rdf_clone(const ldns_rdf *rd)
clones a rdf structure.
Definition: rdata.c:222
void ldns_pkt_set_rd(ldns_pkt *packet, bool rd)
Definition: packet.c:503
uint16_t ldns_pkt_nscount(const ldns_pkt *packet)
Return the packet's ns count.
Definition: packet.c:112
@ LDNS_RDF_TYPE_TSIGTIME
tsig time 48 bits
Definition: rdata.h:88
@ LDNS_RDF_TYPE_HIP
Represents the Public Key Algorithm, HIT and Public Key fields for the HIP RR types.
Definition: rdata.h:92
void ldns_rr_set_owner(ldns_rr *rr, ldns_rdf *owner)
sets the owner in the rr structure.
Definition: rr.c:804
@ LDNS_STATUS_WIRE_INCOMPLETE_HEADER
Definition: error.h:72
@ LDNS_STATUS_WIRE_INCOMPLETE_ANSWER
Definition: error.h:74
void ldns_pkt_set_opcode(ldns_pkt *packet, ldns_pkt_opcode opcode)
Set the packet's opcode.
Definition: packet.c:551
enum ldns_enum_status ldns_status
Definition: error.h:146
DNS packet.
Definition: packet.h:234
@ LDNS_RDF_TYPE_B64
b64 string
Definition: rdata.h:68
#define LDNS_XMALLOC(type, count)
Definition: util.h:51
@ 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_DNAME
domain name
Definition: rdata.h:50
@ LDNS_RDF_TYPE_B32_EXT
b32 string
Definition: rdata.h:66
@ LDNS_RDF_TYPE_EUI64
8 * 8 bit hex numbers separated by dashes.
Definition: rdata.h:121
#define LDNS_CD_WIRE(wirebuf)
Definition: wire2host.h:74
@ LDNS_RDF_TYPE_EUI48
6 * 8 bit hex numbers separated by dashes.
Definition: rdata.h:119
@ LDNS_RDF_TYPE_NSEC3_NEXT_OWNER
nsec3 base32 string (with length byte on wire
Definition: rdata.h:111
#define LDNS_ARCOUNT(wirebuf)
Definition: wire2host.h:114
@ LDNS_STATUS_WIRE_INCOMPLETE_ADDITIONAL
Definition: error.h:76
@ LDNS_RDF_TYPE_WKS
well known services
Definition: rdata.h:101
Resource record data field.
Definition: rdata.h:196
enum ldns_enum_pkt_section ldns_pkt_section
Definition: packet.h:287
#define LDNS_RD_WIRE(wirebuf)
Definition: wire2host.h:37
void ldns_pkt_set_ancount(ldns_pkt *packet, uint16_t ancount)
Set the packet's an count.
Definition: packet.c:569
ldns_rr_list * ldns_pkt_additional(const ldns_pkt *packet)
Return the packet's additional section.
Definition: packet.c:142
Contains all information about resource record types.
Definition: rr.h:350
#define LDNS_RDF_SIZE_16BYTES
Definition: rdata.h:38
uint32_t ldns_rr_ttl(const ldns_rr *rr)
returns the ttl of an rr structure.
Definition: rr.c:931
@ LDNS_RDF_TYPE_INT8
8 bits
Definition: rdata.h:52
ldns_pkt * ldns_pkt_new(void)
allocates and initializes a ldns_pkt structure.
Definition: packet.c:841
void ldns_pkt_set_arcount(ldns_pkt *packet, uint16_t arcount)
Set the packet's arcount.
Definition: packet.c:581
@ LDNS_RDF_TYPE_UNKNOWN
unknown types
Definition: rdata.h:82
#define LDNS_RCODE_WIRE(wirebuf)
Definition: wire2host.h:68
void ldns_pkt_set_rcode(ldns_pkt *packet, uint8_t rcode)
Set the packet's response code.
Definition: packet.c:557
#define LDNS_OPCODE_WIRE(wirebuf)
Definition: wire2host.h:55
@ LDNS_RDF_TYPE_SELECTOR
Definition: rdata.h:139
@ LDNS_RDF_TYPE_PERIOD
period
Definition: rdata.h:86
@ 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_STR
txt string
Definition: rdata.h:62
bool 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
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_RDF_TYPE_IPSECKEY
IPSECKEY.
Definition: rdata.h:107
void ldns_pkt_set_aa(ldns_pkt *packet, bool aa)
Definition: packet.c:491
void ldns_pkt_set_edns_data(ldns_pkt *packet, ldns_rdf *data)
Set the packet's EDNS data.
Definition: packet.c:636
@ LDNS_RDF_TYPE_CLASS
a class
Definition: rdata.h:76
void ldns_pkt_set_ra(ldns_pkt *packet, bool ra)
Definition: packet.c:539
@ LDNS_RDF_TYPE_NSEC
nsec type codes
Definition: rdata.h:72
#define LDNS_QR_WIRE(wirebuf)
Definition: wire2host.h:61
void ldns_pkt_set_qdcount(ldns_pkt *packet, uint16_t qdcount)
Set the packet's qd count.
Definition: packet.c:563
#define LDNS_RDF_SIZE_6BYTES
Definition: rdata.h:36
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_rr_list * ldns_pkt_answer(const ldns_pkt *packet)
Return the packet's answer section.
Definition: packet.c:130
uint16_t ldns_pkt_ancount(const ldns_pkt *packet)
Return the packet's an count.
Definition: packet.c:106
@ LDNS_STATUS_MEM_ERR
Definition: error.h:34
@ LDNS_RDF_TYPE_AAAA
AAAA record.
Definition: rdata.h:60
@ LDNS_SECTION_ANSWER
Definition: packet.h:279
@ LDNS_RDF_TYPE_NSEC3_SALT
nsec3 hash salt
Definition: rdata.h:109
@ LDNS_RDF_TYPE_TYPE
a RR type
Definition: rdata.h:74
const ldns_rr_descriptor * ldns_rr_descript(uint16_t type)
returns the resource record descriptor for the given rr type.
Definition: rr.c:2632
void ldns_rr_set_type(ldns_rr *rr, ldns_rr_type rr_type)
sets the type in the rr.
Definition: rr.c:828
void ldns_pkt_set_id(ldns_pkt *packet, uint16_t id)
Set the packet's id.
Definition: packet.c:471
@ LDNS_RDF_TYPE_TIME
time (32 bits)
Definition: rdata.h:84
#define LDNS_MAX_DOMAINLEN
Maximum length of a complete dname.
Definition: rr.h:33
#define LDNS_RA_WIRE(wirebuf)
Definition: wire2host.h:92
@ LDNS_SECTION_ADDITIONAL
Definition: packet.h:281
uint16_t ldns_pkt_arcount(const ldns_pkt *packet)
Return the packet's ar count.
Definition: packet.c:118
@ LDNS_RDF_TYPE_AMTRELAY
draft-ietf-mboned-driad-amt-discovery
Definition: rdata.h:143
void ldns_pkt_set_edns_udp_size(ldns_pkt *packet, uint16_t s)
Set the packet's edns udp size.
Definition: packet.c:612
void ldns_pkt_set_tc(ldns_pkt *packet, bool tc)
Definition: packet.c:497
@ LDNS_RDF_TYPE_ALG
a key algorithm
Definition: rdata.h:80
#define LDNS_RDF_SIZE_8BYTES
Definition: rdata.h:37
#define LDNS_ANCOUNT(wirebuf)
Definition: wire2host.h:106
ldns_rr_type ldns_rr_get_type(const ldns_rr *rr)
returns the type of the rr.
Definition: rr.c:943