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:
205  case LDNS_RDF_TYPE_INT8:
206  cur_rdf_length = LDNS_RDF_SIZE_BYTE;
207  break;
208  case LDNS_RDF_TYPE_TYPE:
209  case LDNS_RDF_TYPE_INT16:
211  cur_rdf_length = LDNS_RDF_SIZE_WORD;
212  break;
213  case LDNS_RDF_TYPE_TIME:
214  case LDNS_RDF_TYPE_INT32:
215  case LDNS_RDF_TYPE_A:
217  cur_rdf_length = LDNS_RDF_SIZE_DOUBLEWORD;
218  break;
220  case LDNS_RDF_TYPE_EUI48:
221  cur_rdf_length = LDNS_RDF_SIZE_6BYTES;
222  break;
224  case LDNS_RDF_TYPE_EUI64:
225  cur_rdf_length = LDNS_RDF_SIZE_8BYTES;
226  break;
227  case LDNS_RDF_TYPE_AAAA:
228  cur_rdf_length = LDNS_RDF_SIZE_16BYTES;
229  break;
230  case LDNS_RDF_TYPE_STR:
232  case LDNS_RDF_TYPE_TAG:
233  /* len is stored in first byte
234  * it should be in the rdf too, so just
235  * copy len+1 from this position
236  */
237  cur_rdf_length = ((size_t) wire[*pos]) + 1;
238  break;
239 
241  if (*pos + 2 > end) {
243  }
244  cur_rdf_length =
245  (size_t) ldns_read_uint16(&wire[*pos]) + 2;
246  break;
247  case LDNS_RDF_TYPE_HIP:
248  if (*pos + 4 > end) {
250  }
251  cur_rdf_length =
252  (size_t) wire[*pos] +
253  (size_t) ldns_read_uint16(&wire[*pos + 2]) + 4;
254  break;
257  /* length is stored in first byte */
258  cur_rdf_length = ((size_t) wire[*pos]) + 1;
259  break;
260  case LDNS_RDF_TYPE_APL:
261  case LDNS_RDF_TYPE_B64:
262  case LDNS_RDF_TYPE_HEX:
263  case LDNS_RDF_TYPE_NSEC:
266  case LDNS_RDF_TYPE_LOC:
267  case LDNS_RDF_TYPE_WKS:
268  case LDNS_RDF_TYPE_NSAP:
269  case LDNS_RDF_TYPE_ATMA:
272  case LDNS_RDF_TYPE_NONE:
273  /*
274  * Read to end of rr rdata
275  */
276  cur_rdf_length = end - *pos;
277  break;
278  }
279 
280  /* fixed length rdata */
281  if (cur_rdf_length > 0) {
282  if (cur_rdf_length + *pos > end) {
284  }
285  data = LDNS_XMALLOC(uint8_t, rd_length);
286  if (!data) {
287  return LDNS_STATUS_MEM_ERR;
288  }
289  memcpy(data, &wire[*pos], cur_rdf_length);
290 
291  cur_rdf = ldns_rdf_new(cur_rdf_type,
292  cur_rdf_length, data);
293  *pos = *pos + cur_rdf_length;
294  }
295 
296  if (cur_rdf) {
297  ldns_rr_push_rdf(rr, cur_rdf);
298  cur_rdf = NULL;
299  }
300 
301  rdf_index++;
302 
303  } /* while (rdf_index < ldns_rr_descriptor_maximum(descriptor)) */
304 
305 
306  return LDNS_STATUS_OK;
307 }
308 
309 
310 /* TODO:
311  can *pos be incremented at READ_INT? or maybe use something like
312  RR_CLASS(wire)?
313  uhhm Jelte??
314 */
316 ldns_wire2rr(ldns_rr **rr_p, const uint8_t *wire, size_t max,
317  size_t *pos, ldns_pkt_section section)
318 {
319  ldns_rdf *owner = NULL;
320  ldns_rr *rr = ldns_rr_new();
321  ldns_status status;
322 
323  status = ldns_wire2dname(&owner, wire, max, pos);
324  LDNS_STATUS_CHECK_GOTO(status, status_error);
325 
326  ldns_rr_set_owner(rr, owner);
327 
328  if (*pos + 4 > max) {
330  goto status_error;
331  }
332 
333  ldns_rr_set_type(rr, ldns_read_uint16(&wire[*pos]));
334  *pos = *pos + 2;
335 
336  ldns_rr_set_class(rr, ldns_read_uint16(&wire[*pos]));
337  *pos = *pos + 2;
338 
339  if (section != LDNS_SECTION_QUESTION) {
340  if (*pos + 4 > max) {
342  goto status_error;
343  }
344  ldns_rr_set_ttl(rr, ldns_read_uint32(&wire[*pos]));
345 
346  *pos = *pos + 4;
347  status = ldns_wire2rdf(rr, wire, max, pos);
348 
349  LDNS_STATUS_CHECK_GOTO(status, status_error);
350  ldns_rr_set_question(rr, false);
351  } else {
352  ldns_rr_set_question(rr, true);
353  }
354 
355  *rr_p = rr;
356  return LDNS_STATUS_OK;
357 
358 status_error:
359  ldns_rr_free(rr);
360  return status;
361 }
362 
363 static ldns_status
364 ldns_wire2pkt_hdr(ldns_pkt *packet, const uint8_t *wire, size_t max, size_t *pos)
365 {
366  if (*pos + LDNS_HEADER_SIZE > max) {
368  } else {
369  ldns_pkt_set_id(packet, LDNS_ID_WIRE(wire));
370  ldns_pkt_set_qr(packet, LDNS_QR_WIRE(wire));
371  ldns_pkt_set_opcode(packet, LDNS_OPCODE_WIRE(wire));
372  ldns_pkt_set_aa(packet, LDNS_AA_WIRE(wire));
373  ldns_pkt_set_tc(packet, LDNS_TC_WIRE(wire));
374  ldns_pkt_set_rd(packet, LDNS_RD_WIRE(wire));
375  ldns_pkt_set_ra(packet, LDNS_RA_WIRE(wire));
376  ldns_pkt_set_ad(packet, LDNS_AD_WIRE(wire));
377  ldns_pkt_set_cd(packet, LDNS_CD_WIRE(wire));
378  ldns_pkt_set_rcode(packet, LDNS_RCODE_WIRE(wire));
379 
380  ldns_pkt_set_qdcount(packet, LDNS_QDCOUNT(wire));
381  ldns_pkt_set_ancount(packet, LDNS_ANCOUNT(wire));
382  ldns_pkt_set_nscount(packet, LDNS_NSCOUNT(wire));
383  ldns_pkt_set_arcount(packet, LDNS_ARCOUNT(wire));
384 
385  *pos += LDNS_HEADER_SIZE;
386 
387  return LDNS_STATUS_OK;
388  }
389 }
390 
393 {
394  /* lazy */
395  return ldns_wire2pkt(packet, ldns_buffer_begin(buffer),
396  ldns_buffer_limit(buffer));
397 
398 }
399 
401 ldns_wire2pkt(ldns_pkt **packet_p, const uint8_t *wire, size_t max)
402 {
403  size_t pos = 0;
404  uint16_t i;
405  ldns_rr *rr;
406  ldns_pkt *packet = ldns_pkt_new();
407  ldns_status status = LDNS_STATUS_OK;
408  int have_edns = 0;
409 
410  uint8_t data[4];
411 
412  status = ldns_wire2pkt_hdr(packet, wire, max, &pos);
413  LDNS_STATUS_CHECK_GOTO(status, status_error);
414 
415  for (i = 0; i < ldns_pkt_qdcount(packet); i++) {
416 
417  status = ldns_wire2rr(&rr, wire, max, &pos, LDNS_SECTION_QUESTION);
418  if (status == LDNS_STATUS_PACKET_OVERFLOW) {
420  }
421  LDNS_STATUS_CHECK_GOTO(status, status_error);
422  if (!ldns_rr_list_push_rr(ldns_pkt_question(packet), rr)) {
423  ldns_pkt_free(packet);
425  }
426  }
427  for (i = 0; i < ldns_pkt_ancount(packet); i++) {
428  status = ldns_wire2rr(&rr, wire, max, &pos, LDNS_SECTION_ANSWER);
429  if (status == LDNS_STATUS_PACKET_OVERFLOW) {
431  }
432  LDNS_STATUS_CHECK_GOTO(status, status_error);
433  if (!ldns_rr_list_push_rr(ldns_pkt_answer(packet), rr)) {
434  ldns_pkt_free(packet);
436  }
437  }
438  for (i = 0; i < ldns_pkt_nscount(packet); i++) {
439  status = ldns_wire2rr(&rr, wire, max, &pos, LDNS_SECTION_AUTHORITY);
440  if (status == LDNS_STATUS_PACKET_OVERFLOW) {
442  }
443  LDNS_STATUS_CHECK_GOTO(status, status_error);
444  if (!ldns_rr_list_push_rr(ldns_pkt_authority(packet), rr)) {
445  ldns_pkt_free(packet);
447  }
448  }
449  for (i = 0; i < ldns_pkt_arcount(packet); i++) {
450  status = ldns_wire2rr(&rr, wire, max, &pos, LDNS_SECTION_ADDITIONAL);
451  if (status == LDNS_STATUS_PACKET_OVERFLOW) {
453  }
454  LDNS_STATUS_CHECK_GOTO(status, status_error);
455 
456  if (ldns_rr_get_type(rr) == LDNS_RR_TYPE_OPT) {
458  ldns_write_uint32(data, ldns_rr_ttl(rr));
459  ldns_pkt_set_edns_extended_rcode(packet, data[0]);
460  ldns_pkt_set_edns_version(packet, data[1]);
461  ldns_pkt_set_edns_z(packet, ldns_read_uint16(&data[2]));
462  /* edns might not have rdfs */
463  if (ldns_rr_rdf(rr, 0)) {
465  }
466  ldns_rr_free(rr);
467  have_edns += 1;
468  } else if (ldns_rr_get_type(rr) == LDNS_RR_TYPE_TSIG) {
469  ldns_pkt_set_tsig(packet, rr);
470  ldns_pkt_set_arcount(packet, ldns_pkt_arcount(packet) - 1);
471  } else if (!ldns_rr_list_push_rr(ldns_pkt_additional(packet), rr)) {
472  ldns_pkt_free(packet);
474  }
475  }
476  ldns_pkt_set_size(packet, max);
477  if(have_edns)
478  ldns_pkt_set_arcount(packet, ldns_pkt_arcount(packet)
479  - have_edns);
480 
481  *packet_p = packet;
482  return status;
483 
484 status_error:
485  ldns_pkt_free(packet);
486  return status;
487 }
void ldns_pkt_set_ancount(ldns_pkt *packet, uint16_t ancount)
Set the packet's an count.
Definition: packet.c:548
ldns_rdf * ldns_rr_rdf(const ldns_rr *rr, size_t nr)
returns the rdata field member counter.
Definition: rr.c:873
implementation of buffers to ease operations
Definition: buffer.h:50
#define LDNS_AD_WIRE(wirebuf)
Definition: wire2host.h:80
time (32 bits)
Definition: rdata.h:84
ldns_pkt * ldns_pkt_new(void)
allocates and initializes a ldns_pkt structure.
Definition: packet.c:732
uint16_t ldns_pkt_arcount(const ldns_pkt *packet)
Return the packet's ar count.
Definition: packet.c:117
void ldns_rr_set_type(ldns_rr *rr, ldns_rr_type rr_type)
sets the type in the rr.
Definition: rr.c:792
void ldns_pkt_set_ad(ldns_pkt *packet, bool ad)
Definition: packet.c:524
b64 string
Definition: rdata.h:68
void ldns_pkt_set_tc(ldns_pkt *packet, bool tc)
Definition: packet.c:476
ldns_rr_list * ldns_pkt_question(const ldns_pkt *packet)
Return the packet's question section.
Definition: packet.c:123
#define LDNS_RD_WIRE(wirebuf)
Definition: wire2host.h:37
Pseudo OPT record...
Definition: rr.h:163
bool ldns_rr_list_push_rr(ldns_rr_list *rr_list, const ldns_rr *rr)
pushes an rr to an rrlist.
Definition: rr.c:1096
void ldns_pkt_set_qdcount(ldns_pkt *packet, uint16_t qdcount)
Set the packet's qd count.
Definition: packet.c:542
unknown types
Definition: rdata.h:82
uint16_t ldns_pkt_qdcount(const ldns_pkt *packet)
Return the packet's qd count.
Definition: packet.c:99
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:2579
ldns_status ldns_buffer2pkt_wire(ldns_pkt **packet, ldns_buffer *buffer)
converts the data on the uint8_t bytearray (in wire format) to a DNS packet.
Definition: wire2host.c:392
a RR type
Definition: rdata.h:74
#define LDNS_XMALLOC(type, count)
Definition: util.h:51
#define LDNS_HEADER_SIZE
Definition: wire2host.h:32
void ldns_pkt_set_ra(ldns_pkt *packet, bool ra)
Definition: packet.c:518
#define LDNS_RDF_SIZE_DOUBLEWORD
Definition: rdata.h:35
#define LDNS_TC_WIRE(wirebuf)
Definition: wire2host.h:43
ldns_rdf * ldns_rdf_clone(const ldns_rdf *rd)
clones a rdf structure.
Definition: rdata.c:222
a class
Definition: rdata.h:76
#define LDNS_RDF_SIZE_6BYTES
Definition: rdata.h:36
#define LDNS_QDCOUNT(wirebuf)
Definition: wire2host.h:105
void ldns_rr_free(ldns_rr *rr)
frees an RR structure
Definition: rr.c:75
void ldns_pkt_set_qr(ldns_pkt *packet, bool qr)
Definition: packet.c:464
IPSECKEY.
Definition: rdata.h:107
#define LDNS_AA_WIRE(wirebuf)
Definition: wire2host.h:49
void ldns_pkt_set_edns_udp_size(ldns_pkt *packet, uint16_t s)
Set the packet's edns udp size.
Definition: packet.c:591
#define LDNS_RDF_SIZE_BYTE
Definition: rdata.h:33
#define LDNS_NSCOUNT(wirebuf)
Definition: wire2host.h:113
void ldns_pkt_set_tsig(ldns_pkt *pkt, ldns_rr *rr)
Set the packet's tsig rr.
Definition: packet.c:642
const ldns_rr_descriptor * ldns_rr_descript(uint16_t type)
returns the resource record descriptor for the given rr type.
Definition: rr.c:2535
protocol and port bitmaps
Definition: rdata.h:97
A non-zero sequence of US-ASCII letters and numbers in lower case.
Definition: rdata.h:126
void ldns_pkt_set_rcode(ldns_pkt *packet, uint8_t rcode)
Set the packet's respons code.
Definition: packet.c:536
A encoding of the value field as specified [RFC1035], Section 5.1., encoded as remaining rdata.
Definition: rdata.h:132
apl data
Definition: rdata.h:64
Resource Record.
Definition: rr.h:299
void ldns_pkt_set_size(ldns_pkt *packet, size_t s)
Set the packet's size.
Definition: packet.c:585
void ldns_pkt_set_arcount(ldns_pkt *packet, uint16_t arcount)
Set the packet's arcount.
Definition: packet.c:560
Including this file will include all ldns files, and define some lookup tables.
certificate algorithm
Definition: rdata.h:78
#define LDNS_RDF_SIZE_16BYTES
Definition: rdata.h:38
uint16_t ldns_pkt_nscount(const ldns_pkt *packet)
Return the packet's ns count.
Definition: packet.c:111
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
void ldns_rr_set_class(ldns_rr *rr, ldns_rr_class rr_class)
sets the class in the rr.
Definition: rr.c:798
enum ldns_enum_rdf_type ldns_rdf_type
Definition: rdata.h:137
16 bits
Definition: rdata.h:54
#define LDNS_STATUS_CHECK_RETURN(st)
Definition: wire2host.c:154
void ldns_rr_set_question(ldns_rr *rr, bool question)
Definition: rr.c:774
#define LDNS_MAX_DOMAINLEN
Maximum length of a complete dname.
Definition: rr.h:33
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:401
void ldns_pkt_set_edns_z(ldns_pkt *packet, uint16_t z)
Set the packet's edns z value.
Definition: packet.c:609
uint16_t ldns_pkt_ancount(const ldns_pkt *packet)
Return the packet's an count.
Definition: packet.c:105
void ldns_pkt_set_edns_version(ldns_pkt *packet, uint8_t v)
Set the packet's edns version.
Definition: packet.c:603
variable length any type rdata where the length is specified by the first 2 bytes ...
Definition: rdata.h:95
a key algorithm
Definition: rdata.h:80
b32 string
Definition: rdata.h:66
A record.
Definition: rdata.h:58
nsec type codes
Definition: rdata.h:72
#define LDNS_QR_WIRE(wirebuf)
Definition: wire2host.h:61
void ldns_pkt_set_nscount(ldns_pkt *packet, uint16_t nscount)
Set the packet's ns count.
Definition: packet.c:554
#define LDNS_CD_WIRE(wirebuf)
Definition: wire2host.h:74
void ldns_pkt_set_edns_data(ldns_pkt *packet, ldns_rdf *data)
Set the packet's edns data.
Definition: packet.c:615
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:2564
AAAA record.
Definition: rdata.h:60
#define LDNS_MAX_LABELLEN
Maximum length of a dname label.
Definition: rr.h:31
32 bits
Definition: rdata.h:56
void ldns_pkt_set_id(ldns_pkt *packet, uint16_t id)
Set the packet's id.
Definition: packet.c:450
Contains all information about resource record types.
Definition: rr.h:340
hex string
Definition: rdata.h:70
void ldns_pkt_set_opcode(ldns_pkt *packet, ldns_pkt_opcode opcode)
Set the packet's opcode.
Definition: packet.c:530
DNS packet.
Definition: packet.h:233
void ldns_rr_set_owner(ldns_rr *rr, ldns_rdf *owner)
sets the owner in the rr structure.
Definition: rr.c:768
txt string
Definition: rdata.h:62
ldns_rr_type ldns_rr_get_type(const ldns_rr *rr)
returns the type of the rr.
Definition: rr.c:907
void ldns_pkt_set_edns_extended_rcode(ldns_pkt *packet, uint8_t c)
Set the packet's edns extended rcode.
Definition: packet.c:597
tsig time 48 bits
Definition: rdata.h:88
void ldns_pkt_set_rd(ldns_pkt *packet, bool rd)
Definition: packet.c:482
nsec3 base32 string (with length byte on wire
Definition: rdata.h:111
void ldns_rr_set_ttl(ldns_rr *rr, uint32_t ttl)
sets the ttl in the rr structure.
Definition: rr.c:780
enum ldns_enum_status ldns_status
Definition: error.h:131
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_cd(ldns_pkt *packet, bool cd)
Definition: packet.c:512
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
#define LDNS_RDF_SIZE_WORD
Definition: rdata.h:34
#define LDNS_RDF_SIZE_8BYTES
Definition: rdata.h:37
4 shorts represented as 4 * 16 bit hex numbers separated by colons.
Definition: rdata.h:116
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:821
Resource record data field.
Definition: rdata.h:166
Represents the Public Key Algorithm, HIT and Public Key fields for the HIP RR types.
Definition: rdata.h:92
#define LDNS_OPCODE_WIRE(wirebuf)
Definition: wire2host.h:55
nsec3 hash salt
Definition: rdata.h:109
8 bits
Definition: rdata.h:52
#define LDNS_ID_WIRE(wirebuf)
Definition: wire2host.h:97
ldns_rr * ldns_rr_new(void)
creates a new rr structure.
Definition: rr.c:24
ldns_rr_list * ldns_pkt_authority(const ldns_pkt *packet)
Return the packet's authority section.
Definition: packet.c:135
#define LDNS_RA_WIRE(wirebuf)
Definition: wire2host.h:92
void ldns_pkt_set_aa(ldns_pkt *packet, bool aa)
Definition: packet.c:470
uint32_t ldns_rr_ttl(const ldns_rr *rr)
returns the ttl of an rr structure.
Definition: rr.c:895
#define LDNS_MAX_POINTERS
Maximum number of pointers in 1 dname.
Definition: rr.h:35
ldns_rr_class ldns_rr_get_class(const ldns_rr *rr)
returns the class of the rr.
Definition: rr.c:913
#define LDNS_ANCOUNT(wirebuf)
Definition: wire2host.h:109
#define LDNS_ARCOUNT(wirebuf)
Definition: wire2host.h:117
enum ldns_enum_pkt_section ldns_pkt_section
Definition: packet.h:282
domain name
Definition: rdata.h:50
location data
Definition: rdata.h:99
ldns_rr_list * ldns_pkt_additional(const ldns_pkt *packet)
Return the packet's additional section.
Definition: packet.c:141
ldns_rr_list * ldns_pkt_answer(const ldns_pkt *packet)
Return the packet's answer section.
Definition: packet.c:129
8 * 8 bit hex numbers separated by dashes.
Definition: rdata.h:121
6 * 8 bit hex numbers separated by dashes.
Definition: rdata.h:119
void ldns_pkt_free(ldns_pkt *packet)
frees the packet structure and all data that it contains.
Definition: packet.c:784
well known services
Definition: rdata.h:101
#define LDNS_RCODE_WIRE(wirebuf)
Definition: wire2host.h:68
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:316
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