GNUnet  0.18.1
DNS parser library

Helper library to parse DNS packets. More...

Collaboration diagram for DNS parser library:

Data Structures

struct  GNUNET_DNSPARSER_Query
 A DNS query. More...
 
struct  GNUNET_DNSPARSER_MxRecord
 Information from MX records (RFC 1035). More...
 
struct  GNUNET_DNSPARSER_SrvRecord
 Information from SRV records (RFC 2782). More...
 
struct  GNUNET_DNSPARSER_CertRecord
 Information from CERT records (RFC 4034). More...
 
struct  GNUNET_DNSPARSER_SoaRecord
 Information from SOA records (RFC 1035). More...
 
struct  GNUNET_DNSPARSER_CaaRecord
 Information from CAA records (RFC 6844). More...
 
struct  GNUNET_DNSPARSER_RawRecord
 Binary record information (unparsed). More...
 
struct  GNUNET_DNSPARSER_Record
 A DNS response record. More...
 
struct  GNUNET_DNSPARSER_Packet
 Easy-to-process, parsed version of a DNS packet. More...
 

Macros

#define GNUNET_DNSPARSER_MAX_LABEL_LENGTH   63
 Maximum length of a label in DNS. More...
 
#define GNUNET_DNSPARSER_MAX_NAME_LENGTH   253
 Maximum length of a name in DNS. More...
 
#define GNUNET_DNSPARSER_TYPE_ANY   0
 A few common DNS types. More...
 
#define GNUNET_DNSPARSER_TYPE_A   1
 
#define GNUNET_DNSPARSER_TYPE_NS   2
 
#define GNUNET_DNSPARSER_TYPE_CNAME   5
 
#define GNUNET_DNSPARSER_TYPE_SOA   6
 
#define GNUNET_DNSPARSER_TYPE_PTR   12
 
#define GNUNET_DNSPARSER_TYPE_MX   15
 
#define GNUNET_DNSPARSER_TYPE_TXT   16
 
#define GNUNET_DNSPARSER_TYPE_RP   17
 
#define GNUNET_DNSPARSER_TYPE_AFSDB   18
 
#define GNUNET_DNSPARSER_TYPE_SIG   24
 
#define GNUNET_DNSPARSER_TYPE_KEY   25
 
#define GNUNET_DNSPARSER_TYPE_AAAA   28
 
#define GNUNET_DNSPARSER_TYPE_LOC   29
 
#define GNUNET_DNSPARSER_TYPE_SRV   33
 
#define GNUNET_DNSPARSER_TYPE_NAPTR   35
 
#define GNUNET_DNSPARSER_TYPE_KX   36
 
#define GNUNET_DNSPARSER_TYPE_CERT   37
 
#define GNUNET_DNSPARSER_TYPE_DNAME   39
 
#define GNUNET_DNSPARSER_TYPE_APL   42
 
#define GNUNET_DNSPARSER_TYPE_DS   43
 
#define GNUNET_DNSPARSER_TYPE_SSHFP   44
 
#define GNUNET_DNSPARSER_TYPE_IPSECKEY   45
 
#define GNUNET_DNSPARSER_TYPE_RRSIG   46
 
#define GNUNET_DNSPARSER_TYPE_NSEC   47
 
#define GNUNET_DNSPARSER_TYPE_DNSKEY   48
 
#define GNUNET_DNSPARSER_TYPE_DHCID   49
 
#define GNUNET_DNSPARSER_TYPE_NSEC3   50
 
#define GNUNET_DNSPARSER_TYPE_NSEC3PARAM   51
 
#define GNUNET_DNSPARSER_TYPE_TLSA   52
 
#define GNUNET_DNSPARSER_TYPE_HIP   55
 
#define GNUNET_DNSPARSER_TYPE_CDS   59
 
#define GNUNET_DNSPARSER_TYPE_CDNSKEY   60
 
#define GNUNET_DNSPARSER_TYPE_OPENPGPKEY   61
 
#define GNUNET_DNSPARSER_TYPE_TKEY   249
 
#define GNUNET_DNSPARSER_TYPE_TSIG   250
 
#define GNUNET_DNSPARSER_TYPE_ALL   255
 
#define GNUNET_DNSPARSER_TYPE_URI   256
 
#define GNUNET_DNSPARSER_TYPE_CAA   257
 
#define GNUNET_DNSPARSER_TYPE_TA   32768
 

Enumerations

enum  GNUNET_DNSPARSER_CertType {
  GNUNET_DNSPARSER_CERTTYPE_RESERVED = 0 , GNUNET_DNSPARSER_CERTTYPE_PKIX = 1 , GNUNET_DNSPARSER_CERTTYPE_SKPI = 2 , GNUNET_DNSPARSER_CERTTYPE_PGP = 3 ,
  GNUNET_DNSPARSER_CERTTYPE_IPKIX = 4 , GNUNET_DNSPARSER_CERTTYPE_ISKPI = 5 , GNUNET_DNSPARSER_CERTTYPE_IPGP = 6 , GNUNET_DNSPARSER_CERTTYPE_ACPKIX = 7 ,
  GNUNET_DNSPARSER_CERTTYPE_IACKPIX = 8
}
 DNS CERT types as defined in RFC 4398. More...
 
enum  GNUNET_DNSPARSER_CertAlgorithm {
  GNUNET_DNSPARSER_CERTALGO_UNDEFINED = 0 , GNUNET_DNSPARSER_CERTALGO_RSAMD5 = 1 , GNUNET_DNSPARSER_CERTALGO_DH = 2 , GNUNET_DNSPARSER_CERTALGO_DSASHA = 3 ,
  GNUNET_DNSPARSER_CERTALGO_RSRVD4 = 4 , GNUNET_DNSPARSER_CERTALGO_RSASHA = 5 , GNUNET_DNSPARSER_CERTALGO_DSANSEC3 = 6 , GNUNET_DNSPARSER_CERTALGO_RSANSEC3 = 7 ,
  GNUNET_DNSPARSER_CERTALGO_RSASHA256 = 8 , GNUNET_DNSPARSER_CERTALGO_RSRVD9 = 9 , GNUNET_DNSPARSER_CERTALGO_RSASHA512 = 10 , GNUNET_DNSPARSER_CERTALGO_GOST_R34 = 12 ,
  GNUNET_DNSPARSER_CERTALGO_ECDSA_P256SHA256 = 13 , GNUNET_DNSPARSER_CERTALGO_ECDSA_P384SHA384 = 14
}
 DNSCERT algorithms as defined in http://www.iana.org/assignments/ dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml, under dns-sec-alg-numbers-1. More...
 

Functions

int GNUNET_DNSPARSER_check_label (const char *label)
 Check if a label in UTF-8 format can be coded into valid IDNA. More...
 
int GNUNET_DNSPARSER_check_name (const char *name)
 Check if a hostname in UTF-8 format can be coded into valid IDNA. More...
 
struct GNUNET_DNSPARSER_PacketGNUNET_DNSPARSER_parse (const char *udp_payload, size_t udp_payload_length)
 Parse a UDP payload of a DNS packet in to a nice struct for further processing and manipulation. More...
 
void GNUNET_DNSPARSER_free_packet (struct GNUNET_DNSPARSER_Packet *p)
 Free memory taken by a packet. More...
 
int GNUNET_DNSPARSER_pack (const struct GNUNET_DNSPARSER_Packet *p, uint16_t max, char **buf, size_t *buf_length)
 Given a DNS packet p, generate the corresponding UDP payload. More...
 
int GNUNET_DNSPARSER_builder_add_name (char *dst, size_t dst_len, size_t *off, const char *name)
 Add a DNS name to the UDP packet at the given location, converting the name to IDNA notation as necessary. More...
 
int GNUNET_DNSPARSER_builder_add_query (char *dst, size_t dst_len, size_t *off, const struct GNUNET_DNSPARSER_Query *query)
 Add a DNS query to the UDP packet at the given location. More...
 
int GNUNET_DNSPARSER_builder_add_mx (char *dst, size_t dst_len, size_t *off, const struct GNUNET_DNSPARSER_MxRecord *mx)
 Add an MX record to the UDP packet at the given location. More...
 
int GNUNET_DNSPARSER_builder_add_soa (char *dst, size_t dst_len, size_t *off, const struct GNUNET_DNSPARSER_SoaRecord *soa)
 Add an SOA record to the UDP packet at the given location. More...
 
int GNUNET_DNSPARSER_builder_add_cert (char *dst, size_t dst_len, size_t *off, const struct GNUNET_DNSPARSER_CertRecord *cert)
 Add CERT record to the UDP packet at the given location. More...
 
int GNUNET_DNSPARSER_builder_add_srv (char *dst, size_t dst_len, size_t *off, const struct GNUNET_DNSPARSER_SrvRecord *srv)
 Add an SRV record to the UDP packet at the given location. More...
 
int GNUNET_DNSPARSER_parse_record (const char *udp_payload, size_t udp_payload_length, size_t *off, struct GNUNET_DNSPARSER_Record *r)
 Parse a DNS record entry. More...
 
char * GNUNET_DNSPARSER_parse_name (const char *udp_payload, size_t udp_payload_length, size_t *off)
 Parse name inside of a DNS query or record. More...
 
int GNUNET_DNSPARSER_parse_query (const char *udp_payload, size_t udp_payload_length, size_t *off, struct GNUNET_DNSPARSER_Query *q)
 Parse a DNS query entry. More...
 
struct GNUNET_DNSPARSER_SoaRecordGNUNET_DNSPARSER_parse_soa (const char *udp_payload, size_t udp_payload_length, size_t *off)
 Parse a DNS SOA record. More...
 
struct GNUNET_DNSPARSER_CertRecordGNUNET_DNSPARSER_parse_cert (const char *udp_payload, size_t udp_payload_length, size_t *off)
 Parse a DNS CERT record. More...
 
struct GNUNET_DNSPARSER_MxRecordGNUNET_DNSPARSER_parse_mx (const char *udp_payload, size_t udp_payload_length, size_t *off)
 Parse a DNS MX record. More...
 
struct GNUNET_DNSPARSER_SrvRecordGNUNET_DNSPARSER_parse_srv (const char *udp_payload, size_t udp_payload_length, size_t *off)
 Parse a DNS SRV record. More...
 
struct GNUNET_DNSPARSER_RecordGNUNET_DNSPARSER_duplicate_record (const struct GNUNET_DNSPARSER_Record *r)
 Duplicate (deep-copy) the given DNS record. More...
 
struct GNUNET_DNSPARSER_SoaRecordGNUNET_DNSPARSER_duplicate_soa_record (const struct GNUNET_DNSPARSER_SoaRecord *r)
 Duplicate (deep-copy) the given DNS record. More...
 
struct GNUNET_DNSPARSER_CertRecordGNUNET_DNSPARSER_duplicate_cert_record (const struct GNUNET_DNSPARSER_CertRecord *r)
 Duplicate (deep-copy) the given DNS record. More...
 
struct GNUNET_DNSPARSER_MxRecordGNUNET_DNSPARSER_duplicate_mx_record (const struct GNUNET_DNSPARSER_MxRecord *r)
 Duplicate (deep-copy) the given DNS record. More...
 
struct GNUNET_DNSPARSER_SrvRecordGNUNET_DNSPARSER_duplicate_srv_record (const struct GNUNET_DNSPARSER_SrvRecord *r)
 Duplicate (deep-copy) the given DNS record. More...
 
void GNUNET_DNSPARSER_free_record (struct GNUNET_DNSPARSER_Record *r)
 Free the given DNS record. More...
 
void GNUNET_DNSPARSER_free_mx (struct GNUNET_DNSPARSER_MxRecord *mx)
 Free MX information record. More...
 
void GNUNET_DNSPARSER_free_srv (struct GNUNET_DNSPARSER_SrvRecord *srv)
 Free SRV information record. More...
 
void GNUNET_DNSPARSER_free_soa (struct GNUNET_DNSPARSER_SoaRecord *soa)
 Free SOA information record. More...
 
void GNUNET_DNSPARSER_free_cert (struct GNUNET_DNSPARSER_CertRecord *cert)
 Free CERT information record. More...
 
char * GNUNET_DNSPARSER_bin_to_hex (const void *data, size_t data_size)
 Convert a block of binary data to HEX. More...
 
size_t GNUNET_DNSPARSER_hex_to_bin (const char *hex, void *data)
 Convert a HEX string to block of binary data. More...
 

Detailed Description

Helper library to parse DNS packets.

Macro Definition Documentation

◆ GNUNET_DNSPARSER_MAX_LABEL_LENGTH

#define GNUNET_DNSPARSER_MAX_LABEL_LENGTH   63

Maximum length of a label in DNS.

Definition at line 43 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_MAX_NAME_LENGTH

#define GNUNET_DNSPARSER_MAX_NAME_LENGTH   253

Maximum length of a name in DNS.

Definition at line 48 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_ANY

#define GNUNET_DNSPARSER_TYPE_ANY   0

A few common DNS types.

Definition at line 54 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_A

#define GNUNET_DNSPARSER_TYPE_A   1

Definition at line 55 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_NS

#define GNUNET_DNSPARSER_TYPE_NS   2

Definition at line 56 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_CNAME

#define GNUNET_DNSPARSER_TYPE_CNAME   5

Definition at line 57 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_SOA

#define GNUNET_DNSPARSER_TYPE_SOA   6

Definition at line 58 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_PTR

#define GNUNET_DNSPARSER_TYPE_PTR   12

Definition at line 59 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_MX

#define GNUNET_DNSPARSER_TYPE_MX   15

Definition at line 60 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_TXT

#define GNUNET_DNSPARSER_TYPE_TXT   16

Definition at line 61 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_RP

#define GNUNET_DNSPARSER_TYPE_RP   17

Definition at line 62 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_AFSDB

#define GNUNET_DNSPARSER_TYPE_AFSDB   18

Definition at line 63 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_SIG

#define GNUNET_DNSPARSER_TYPE_SIG   24

Definition at line 64 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_KEY

#define GNUNET_DNSPARSER_TYPE_KEY   25

Definition at line 65 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_AAAA

#define GNUNET_DNSPARSER_TYPE_AAAA   28

Definition at line 66 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_LOC

#define GNUNET_DNSPARSER_TYPE_LOC   29

Definition at line 67 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_SRV

#define GNUNET_DNSPARSER_TYPE_SRV   33

Definition at line 68 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_NAPTR

#define GNUNET_DNSPARSER_TYPE_NAPTR   35

Definition at line 69 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_KX

#define GNUNET_DNSPARSER_TYPE_KX   36

Definition at line 70 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_CERT

#define GNUNET_DNSPARSER_TYPE_CERT   37

Definition at line 71 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_DNAME

#define GNUNET_DNSPARSER_TYPE_DNAME   39

Definition at line 72 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_APL

#define GNUNET_DNSPARSER_TYPE_APL   42

Definition at line 73 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_DS

#define GNUNET_DNSPARSER_TYPE_DS   43

Definition at line 74 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_SSHFP

#define GNUNET_DNSPARSER_TYPE_SSHFP   44

Definition at line 75 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_IPSECKEY

#define GNUNET_DNSPARSER_TYPE_IPSECKEY   45

Definition at line 76 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_RRSIG

#define GNUNET_DNSPARSER_TYPE_RRSIG   46

Definition at line 77 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_NSEC

#define GNUNET_DNSPARSER_TYPE_NSEC   47

Definition at line 78 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_DNSKEY

#define GNUNET_DNSPARSER_TYPE_DNSKEY   48

Definition at line 79 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_DHCID

#define GNUNET_DNSPARSER_TYPE_DHCID   49

Definition at line 80 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_NSEC3

#define GNUNET_DNSPARSER_TYPE_NSEC3   50

Definition at line 81 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_NSEC3PARAM

#define GNUNET_DNSPARSER_TYPE_NSEC3PARAM   51

Definition at line 82 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_TLSA

#define GNUNET_DNSPARSER_TYPE_TLSA   52

Definition at line 83 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_HIP

#define GNUNET_DNSPARSER_TYPE_HIP   55

Definition at line 84 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_CDS

#define GNUNET_DNSPARSER_TYPE_CDS   59

Definition at line 85 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_CDNSKEY

#define GNUNET_DNSPARSER_TYPE_CDNSKEY   60

Definition at line 86 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_OPENPGPKEY

#define GNUNET_DNSPARSER_TYPE_OPENPGPKEY   61

Definition at line 87 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_TKEY

#define GNUNET_DNSPARSER_TYPE_TKEY   249

Definition at line 88 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_TSIG

#define GNUNET_DNSPARSER_TYPE_TSIG   250

Definition at line 89 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_ALL

#define GNUNET_DNSPARSER_TYPE_ALL   255

Definition at line 90 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_URI

#define GNUNET_DNSPARSER_TYPE_URI   256

Definition at line 91 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_CAA

#define GNUNET_DNSPARSER_TYPE_CAA   257

Definition at line 92 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_TA

#define GNUNET_DNSPARSER_TYPE_TA   32768

Definition at line 93 of file gnunet_dnsparser_lib.h.

Enumeration Type Documentation

◆ GNUNET_DNSPARSER_CertType

DNS CERT types as defined in RFC 4398.

Enumerator
GNUNET_DNSPARSER_CERTTYPE_RESERVED 

Reserved value.

GNUNET_DNSPARSER_CERTTYPE_PKIX 

An x509 PKIX certificate.

GNUNET_DNSPARSER_CERTTYPE_SKPI 

A SKPI certificate.

GNUNET_DNSPARSER_CERTTYPE_PGP 

A PGP certificate.

GNUNET_DNSPARSER_CERTTYPE_IPKIX 

An x509 PKIX cert URL.

GNUNET_DNSPARSER_CERTTYPE_ISKPI 

A SKPI cert URL.

GNUNET_DNSPARSER_CERTTYPE_IPGP 

A PGP cert fingerprint and URL.

GNUNET_DNSPARSER_CERTTYPE_ACPKIX 

An attribute Certificate.

GNUNET_DNSPARSER_CERTTYPE_IACKPIX 

An attribute cert URL.

Definition at line 180 of file gnunet_dnsparser_lib.h.

181 {
186 
191 
196 
201 
206 
211 
216 
221 
226 };
@ GNUNET_DNSPARSER_CERTTYPE_SKPI
A SKPI certificate.
@ GNUNET_DNSPARSER_CERTTYPE_ISKPI
A SKPI cert URL.
@ GNUNET_DNSPARSER_CERTTYPE_IPGP
A PGP cert fingerprint and URL.
@ GNUNET_DNSPARSER_CERTTYPE_IACKPIX
An attribute cert URL.
@ GNUNET_DNSPARSER_CERTTYPE_PGP
A PGP certificate.
@ GNUNET_DNSPARSER_CERTTYPE_ACPKIX
An attribute Certificate.
@ GNUNET_DNSPARSER_CERTTYPE_RESERVED
Reserved value.
@ GNUNET_DNSPARSER_CERTTYPE_PKIX
An x509 PKIX certificate.
@ GNUNET_DNSPARSER_CERTTYPE_IPKIX
An x509 PKIX cert URL.

◆ GNUNET_DNSPARSER_CertAlgorithm

DNSCERT algorithms as defined in http://www.iana.org/assignments/ dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml, under dns-sec-alg-numbers-1.

Enumerator
GNUNET_DNSPARSER_CERTALGO_UNDEFINED 

No defined.

GNUNET_DNSPARSER_CERTALGO_RSAMD5 

RSA/MD5.

GNUNET_DNSPARSER_CERTALGO_DH 

Diffie-Hellman.

GNUNET_DNSPARSER_CERTALGO_DSASHA 

DSA/SHA1.

GNUNET_DNSPARSER_CERTALGO_RSRVD4 

Reserved.

GNUNET_DNSPARSER_CERTALGO_RSASHA 

RSA/SHA1.

GNUNET_DNSPARSER_CERTALGO_DSANSEC3 

DSA/NSEC3/SHA.

GNUNET_DNSPARSER_CERTALGO_RSANSEC3 

RSA/NSEC3/SHA.

GNUNET_DNSPARSER_CERTALGO_RSASHA256 

RSA/SHA256.

GNUNET_DNSPARSER_CERTALGO_RSRVD9 

Reserved.

GNUNET_DNSPARSER_CERTALGO_RSASHA512 

RSA/SHA512.

GNUNET_DNSPARSER_CERTALGO_GOST_R34 

GHOST R 34.10-2001.

GNUNET_DNSPARSER_CERTALGO_ECDSA_P256SHA256 

ECDSA Curve P-256/SHA256.

GNUNET_DNSPARSER_CERTALGO_ECDSA_P384SHA384 

ECDSA Curve P-384/SHA384.

Definition at line 233 of file gnunet_dnsparser_lib.h.

234 {
239 
244 
249 
254 
259 
264 
269 
274 
279 
284 
289 
294 
299 
304 };
@ GNUNET_DNSPARSER_CERTALGO_RSAMD5
RSA/MD5.
@ GNUNET_DNSPARSER_CERTALGO_RSASHA
RSA/SHA1.
@ GNUNET_DNSPARSER_CERTALGO_RSRVD9
Reserved.
@ GNUNET_DNSPARSER_CERTALGO_GOST_R34
GHOST R 34.10-2001.
@ GNUNET_DNSPARSER_CERTALGO_RSASHA256
RSA/SHA256.
@ GNUNET_DNSPARSER_CERTALGO_RSRVD4
Reserved.
@ GNUNET_DNSPARSER_CERTALGO_DSANSEC3
DSA/NSEC3/SHA.
@ GNUNET_DNSPARSER_CERTALGO_ECDSA_P256SHA256
ECDSA Curve P-256/SHA256.
@ GNUNET_DNSPARSER_CERTALGO_RSASHA512
RSA/SHA512.
@ GNUNET_DNSPARSER_CERTALGO_DH
Diffie-Hellman.
@ GNUNET_DNSPARSER_CERTALGO_ECDSA_P384SHA384
ECDSA Curve P-384/SHA384.
@ GNUNET_DNSPARSER_CERTALGO_RSANSEC3
RSA/NSEC3/SHA.
@ GNUNET_DNSPARSER_CERTALGO_DSASHA
DSA/SHA1.
@ GNUNET_DNSPARSER_CERTALGO_UNDEFINED
No defined.

Function Documentation

◆ GNUNET_DNSPARSER_check_label()

int GNUNET_DNSPARSER_check_label ( const char *  label)

Check if a label in UTF-8 format can be coded into valid IDNA.

This can fail if the ASCII-conversion becomes longer than 63 characters.

Parameters
labellabel to check (UTF-8 string)
Returns
GNUNET_OK if the label can be converted to IDNA, GNUNET_SYSERR if the label is not valid for DNS names

Definition at line 53 of file dnsparser.c.

54 {
55  char *output;
56  size_t slen;
57 
58  if (NULL != strchr (label, '.'))
59  return GNUNET_SYSERR; /* not a label! Did you mean GNUNET_DNSPARSER_check_name? */
60  if (0 == strcmp (label, "@")) /* '@' is reserved for the empty label, see #GNUNET_GNS_EMPTY_LABEL_AT */
61  return GNUNET_SYSERR;
62  if (IDNA_SUCCESS != idna_to_ascii_8z (label, &output, IDNA_ALLOW_UNASSIGNED))
63  return GNUNET_SYSERR;
64  slen = strlen (output);
65  free (output);
66  return (slen > 63) ? GNUNET_SYSERR : GNUNET_OK;
67 }
@ GNUNET_OK
Definition: gnunet_common.h:99
@ GNUNET_SYSERR
Definition: gnunet_common.h:97

References GNUNET_OK, and GNUNET_SYSERR.

Referenced by GNUNET_DNSPARSER_check_name().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_check_name()

int GNUNET_DNSPARSER_check_name ( const char *  name)

Check if a hostname in UTF-8 format can be coded into valid IDNA.

This can fail if a label becomes longer than 63 characters or if the entire name exceeds 253 characters.

Parameters
namename to check (UTF-8 string)
Returns
GNUNET_OK if the label can be converted to IDNA, GNUNET_SYSERR if the label is not valid for DNS names

Check if a hostname in UTF-8 format can be coded into valid IDNA.

This can fail if the ASCII-conversion becomes longer than 253 characters.

Parameters
namename to check (UTF-8 string)
Returns
GNUNET_OK if the label can be converted to IDNA, GNUNET_SYSERR if the label is not valid for DNS names

Definition at line 79 of file dnsparser.c.

80 {
81  char *ldup;
82  char *output;
83  size_t slen;
84  char *tok;
85 
86  ldup = GNUNET_strdup (name);
87  for (tok = strtok (ldup, "."); NULL != tok; tok = strtok (NULL, "."))
89  {
90  GNUNET_free (ldup);
91  return GNUNET_SYSERR;
92  }
93  GNUNET_free (ldup);
94  if (IDNA_SUCCESS != idna_to_ascii_8z (name, &output, IDNA_ALLOW_UNASSIGNED))
95  return GNUNET_SYSERR;
96  slen = strlen (output);
97  free (output);
98  return (slen > 253) ? GNUNET_SYSERR : GNUNET_OK;
99 }
int GNUNET_DNSPARSER_check_label(const char *label)
Check if a label in UTF-8 format can be coded into valid IDNA.
Definition: dnsparser.c:53
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define GNUNET_free(ptr)
Wrapper around free.
const char * name

References GNUNET_DNSPARSER_check_label(), GNUNET_free, GNUNET_OK, GNUNET_strdup, GNUNET_SYSERR, and name.

Referenced by queue(), and run().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_parse()

struct GNUNET_DNSPARSER_Packet* GNUNET_DNSPARSER_parse ( const char *  udp_payload,
size_t  udp_payload_length 
)

Parse a UDP payload of a DNS packet in to a nice struct for further processing and manipulation.

Parameters
udp_payloadwire-format of the DNS packet
udp_payload_lengthnumber of bytes in udp_payload
Returns
NULL on error, otherwise the parsed packet

Definition at line 656 of file dnsparser.c.

657 {
658  struct GNUNET_DNSPARSER_Packet *p;
659  const struct GNUNET_TUN_DnsHeader *dns;
660  size_t off;
661  unsigned int n;
662 
663  if (udp_payload_length < sizeof(struct GNUNET_TUN_DnsHeader))
664  return NULL;
665  dns = (const struct GNUNET_TUN_DnsHeader *) udp_payload;
666  off = sizeof(struct GNUNET_TUN_DnsHeader);
668  p->flags = dns->flags;
669  p->id = dns->id;
670  n = ntohs (dns->query_count);
671  if (n > 0)
672  {
673  p->queries = GNUNET_new_array (n, struct GNUNET_DNSPARSER_Query);
674  p->num_queries = n;
675  for (unsigned int i = 0; i < n; i++)
676  if (GNUNET_OK != GNUNET_DNSPARSER_parse_query (udp_payload,
677  udp_payload_length,
678  &off,
679  &p->queries[i]))
680  goto error;
681  }
682  n = ntohs (dns->answer_rcount);
683  if (n > 0)
684  {
685  p->answers = GNUNET_new_array (n, struct GNUNET_DNSPARSER_Record);
686  p->num_answers = n;
687  for (unsigned int i = 0; i < n; i++)
688  if (GNUNET_OK != GNUNET_DNSPARSER_parse_record (udp_payload,
689  udp_payload_length,
690  &off,
691  &p->answers[i]))
692  goto error;
693  }
694  n = ntohs (dns->authority_rcount);
695  if (n > 0)
696  {
697  p->authority_records = GNUNET_new_array (n, struct GNUNET_DNSPARSER_Record);
698  p->num_authority_records = n;
699  for (unsigned int i = 0; i < n; i++)
700  if (GNUNET_OK != GNUNET_DNSPARSER_parse_record (udp_payload,
701  udp_payload_length,
702  &off,
703  &p->authority_records[i]))
704  goto error;
705  }
706  n = ntohs (dns->additional_rcount);
707  if (n > 0)
708  {
709  p->additional_records =
711  p->num_additional_records = n;
712  for (unsigned int i = 0; i < n; i++)
713  {
714  if (GNUNET_OK !=
715  GNUNET_DNSPARSER_parse_record (udp_payload,
716  udp_payload_length,
717  &off,
718  &p->additional_records[i]))
719  goto error;
720  }
721  }
722  return p;
723 error:
724  GNUNET_break_op (0);
726  return NULL;
727 }
static struct GNUNET_OS_Process * p
Helper process we started.
Definition: gnunet-uri.c:37
void GNUNET_DNSPARSER_free_packet(struct GNUNET_DNSPARSER_Packet *p)
Free memory taken by a packet.
Definition: dnsparser.c:854
int GNUNET_DNSPARSER_parse_query(const char *udp_payload, size_t udp_payload_length, size_t *off, struct GNUNET_DNSPARSER_Query *q)
Parse a DNS query entry.
Definition: dnsparser.c:353
int GNUNET_DNSPARSER_parse_record(const char *udp_payload, size_t udp_payload_length, size_t *off, struct GNUNET_DNSPARSER_Record *r)
Parse a DNS record entry.
Definition: dnsparser.c:559
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_new_array(n, type)
Allocate a size n array with structs or unions of the given type.
Easy-to-process, parsed version of a DNS packet.
A DNS response record.
struct GNUNET_TUN_DnsFlags flags
Flags.
uint16_t query_count
Number of queries.
uint16_t authority_rcount
Number of authoritative answers.
uint16_t id
Unique identifier for the request/response.
uint16_t additional_rcount
Number of additional records.
uint16_t answer_rcount
Number of answers.

References GNUNET_TUN_DnsHeader::additional_rcount, GNUNET_TUN_DnsHeader::answer_rcount, GNUNET_TUN_DnsHeader::authority_rcount, GNUNET_TUN_DnsHeader::flags, GNUNET_break_op, GNUNET_DNSPARSER_free_packet(), GNUNET_DNSPARSER_parse_query(), GNUNET_DNSPARSER_parse_record(), GNUNET_new, GNUNET_new_array, GNUNET_OK, GNUNET_TUN_DnsHeader::id, p, and GNUNET_TUN_DnsHeader::query_count.

Referenced by display_request(), dns_post_request_handler(), dns_result_parser(), dns_result_processor(), handle_dns_request(), handle_request(), handle_resolve_result(), modify_request(), and process_result().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_free_packet()

void GNUNET_DNSPARSER_free_packet ( struct GNUNET_DNSPARSER_Packet p)

Free memory taken by a packet.

Parameters
ppacket to free

Definition at line 854 of file dnsparser.c.

855 {
856  for (unsigned int i = 0; i < p->num_queries; i++)
857  GNUNET_free (p->queries[i].name);
858  GNUNET_free (p->queries);
859  for (unsigned int i = 0; i < p->num_answers; i++)
860  GNUNET_DNSPARSER_free_record (&p->answers[i]);
861  GNUNET_free (p->answers);
862  for (unsigned int i = 0; i < p->num_authority_records; i++)
863  GNUNET_DNSPARSER_free_record (&p->authority_records[i]);
864  GNUNET_free (p->authority_records);
865  for (unsigned int i = 0; i < p->num_additional_records; i++)
866  GNUNET_DNSPARSER_free_record (&p->additional_records[i]);
867  GNUNET_free (p->additional_records);
868  GNUNET_free (p);
869 }
void GNUNET_DNSPARSER_free_record(struct GNUNET_DNSPARSER_Record *r)
Free the given DNS record.
Definition: dnsparser.c:169

References GNUNET_DNSPARSER_free_record(), GNUNET_free, and p.

Referenced by display_request(), dns_post_request_handler(), dns_result_parser(), do_timeout(), finish_request(), GNS_interceptor_done(), GNUNET_DNSPARSER_parse(), handle_dns_request(), handle_request(), handle_resolve_result(), modify_request(), process_result(), recursive_dns_resolution(), reply_to_dns(), result_processor(), send_response(), and vpn_allocation_callback().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_pack()

int GNUNET_DNSPARSER_pack ( const struct GNUNET_DNSPARSER_Packet p,
uint16_t  max,
char **  buf,
size_t *  buf_length 
)

Given a DNS packet p, generate the corresponding UDP payload.

Note that we do not attempt to pack the strings with pointers as this would complicate the code and this is about being simple and secure, not fast, fancy and broken like bind.

Parameters
ppacket to pack
maxmaximum allowed size for the resulting UDP payload
bufset to a buffer with the packed message
buf_lengthset to the length of buf
Returns
GNUNET_SYSERR if p is invalid GNUNET_NO if p was truncated (but there is still a result in buf) GNUNET_OK if p was packed completely into buf

Definition at line 1259 of file dnsparser.c.

1263 {
1264  struct GNUNET_TUN_DnsHeader dns;
1265  size_t off;
1266  char tmp[max];
1267  int ret;
1268  int trc;
1269 
1270  if ((p->num_queries > UINT16_MAX) || (p->num_answers > UINT16_MAX) ||
1271  (p->num_authority_records > UINT16_MAX) ||
1272  (p->num_additional_records > UINT16_MAX))
1273  return GNUNET_SYSERR;
1274  dns.id = p->id;
1275  dns.flags = p->flags;
1276  dns.query_count = htons (p->num_queries);
1277  dns.answer_rcount = htons (p->num_answers);
1278  dns.authority_rcount = htons (p->num_authority_records);
1279  dns.additional_rcount = htons (p->num_additional_records);
1280 
1281  off = sizeof(struct GNUNET_TUN_DnsHeader);
1282  trc = GNUNET_NO;
1283  for (unsigned int i = 0; i < p->num_queries; i++)
1284  {
1286  sizeof(tmp),
1287  &off,
1288  &p->queries[i]);
1289  if (GNUNET_SYSERR == ret)
1290  return GNUNET_SYSERR;
1291  if (GNUNET_NO == ret)
1292  {
1293  dns.query_count = htons ((uint16_t) (i - 1));
1294  trc = GNUNET_YES;
1295  break;
1296  }
1297  }
1298  for (unsigned int i = 0; i < p->num_answers; i++)
1299  {
1300  ret = add_record (tmp, sizeof(tmp), &off, &p->answers[i]);
1301  if (GNUNET_SYSERR == ret)
1302  return GNUNET_SYSERR;
1303  if (GNUNET_NO == ret)
1304  {
1305  dns.answer_rcount = htons ((uint16_t) (i - 1));
1306  trc = GNUNET_YES;
1307  break;
1308  }
1309  }
1310  for (unsigned int i = 0; i < p->num_authority_records; i++)
1311  {
1312  ret = add_record (tmp, sizeof(tmp), &off, &p->authority_records[i]);
1313  if (GNUNET_SYSERR == ret)
1314  return GNUNET_SYSERR;
1315  if (GNUNET_NO == ret)
1316  {
1317  dns.authority_rcount = htons ((uint16_t) (i - 1));
1318  trc = GNUNET_YES;
1319  break;
1320  }
1321  }
1322  for (unsigned int i = 0; i < p->num_additional_records; i++)
1323  {
1324  ret = add_record (tmp, sizeof(tmp), &off, &p->additional_records[i]);
1325  if (GNUNET_SYSERR == ret)
1326  return GNUNET_SYSERR;
1327  if (GNUNET_NO == ret)
1328  {
1329  dns.additional_rcount = htons (i - 1);
1330  trc = GNUNET_YES;
1331  break;
1332  }
1333  }
1334 
1335  if (GNUNET_YES == trc)
1336  dns.flags.message_truncated = 1;
1337  GNUNET_memcpy (tmp, &dns, sizeof(struct GNUNET_TUN_DnsHeader));
1338 
1339  *buf = GNUNET_malloc (off);
1340  *buf_length = off;
1341  GNUNET_memcpy (*buf, tmp, off);
1342  if (GNUNET_YES == trc)
1343  return GNUNET_NO;
1344  return GNUNET_OK;
1345 }
static int add_record(char *dst, size_t dst_len, size_t *off, const struct GNUNET_DNSPARSER_Record *record)
Add a DNS record to the UDP packet at the given location.
Definition: dnsparser.c:1156
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
static char buf[2048]
int GNUNET_DNSPARSER_builder_add_query(char *dst, size_t dst_len, size_t *off, const struct GNUNET_DNSPARSER_Query *query)
Add a DNS query to the UDP packet at the given location.
Definition: dnsparser.c:966
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_YES
@ GNUNET_NO
Definition: gnunet_common.h:98
#define GNUNET_malloc(size)
Wrapper around malloc.
#define max(x, y)

References add_record(), GNUNET_TUN_DnsHeader::additional_rcount, GNUNET_TUN_DnsHeader::answer_rcount, GNUNET_TUN_DnsHeader::authority_rcount, buf, GNUNET_TUN_DnsHeader::flags, GNUNET_DNSPARSER_builder_add_query(), GNUNET_malloc, GNUNET_memcpy, GNUNET_NO, GNUNET_OK, GNUNET_SYSERR, GNUNET_YES, GNUNET_TUN_DnsHeader::id, max, GNUNET_TUN_DnsFlags::message_truncated, p, GNUNET_TUN_DnsHeader::query_count, and ret.

Referenced by build_dns_query(), finish_request(), modify_request(), pack(), queue(), recursive_dns_resolution(), reply_to_dns(), and send_response().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_builder_add_name()

int GNUNET_DNSPARSER_builder_add_name ( char *  dst,
size_t  dst_len,
size_t *  off,
const char *  name 
)

Add a DNS name to the UDP packet at the given location, converting the name to IDNA notation as necessary.

Parameters
dstwhere to write the name (UDP packet)
dst_lennumber of bytes in dst
offpointer to offset where to write the name (increment by bytes used) must not be changed if there is an error
namename to write
Returns
GNUNET_SYSERR if name is invalid GNUNET_NO if name did not fit GNUNET_OK if name was added to dst

Definition at line 889 of file dnsparser.c.

893 {
894  const char *dot;
895  const char *idna_name;
896  char *idna_start;
897  size_t start;
898  size_t pos;
899  size_t len;
900  Idna_rc rc;
901 
902  if (NULL == name)
903  return GNUNET_SYSERR;
904 
905  if (IDNA_SUCCESS !=
906  (rc = idna_to_ascii_8z (name, &idna_start, IDNA_ALLOW_UNASSIGNED)))
907  {
909  _ (
910  "Failed to convert UTF-8 name `%s' to DNS IDNA format: %s\n"),
911  name,
912  idna_strerror (rc));
913  return GNUNET_NO;
914  }
915  idna_name = idna_start;
916  start = *off;
917  if (start + strlen (idna_name) + 2 > dst_len)
918  goto fail;
919  pos = start;
920  do
921  {
922  dot = strchr (idna_name, '.');
923  if (NULL == dot)
924  len = strlen (idna_name);
925  else
926  len = dot - idna_name;
927  if (len == 0)
928  break;
929  if (len >= 64)
930  {
932  "Invalid DNS name `%s': label with %u characters encountered\n",
933  name,
934  (unsigned int) len);
935  goto fail; /* label too long or empty */
936  }
937  dst[pos++] = (char) (uint8_t) len;
938  GNUNET_memcpy (&dst[pos], idna_name, len);
939  pos += len;
940  idna_name += len + 1; /* also skip dot */
941  }
942  while (NULL != dot);
943  dst[pos++] = '\0'; /* terminator */
944  *off = pos;
945  free (idna_start);
946  return GNUNET_OK;
947 fail:
948  free (idna_start);
949  return GNUNET_NO;
950 }
static int start
Set if we are to start default services (including ARM).
Definition: gnunet-arm.c:39
char * idna_name
DNS IDNA name to lookup.
Definition: gnunet-gns.c:64
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
#define GNUNET_log(kind,...)
@ GNUNET_ERROR_TYPE_WARNING
@ GNUNET_ERROR_TYPE_ERROR
#define _(String)
GNU gettext support macro.
Definition: platform.h:177

References _, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_memcpy, GNUNET_NO, GNUNET_OK, GNUNET_SYSERR, idna_name, len, name, and start.

Referenced by add_record(), check_for_glue(), dns_result_parser(), dns_string_to_value(), gns_string_to_value(), GNUNET_DNSPARSER_builder_add_mx(), GNUNET_DNSPARSER_builder_add_query(), GNUNET_DNSPARSER_builder_add_soa(), GNUNET_DNSPARSER_builder_add_srv(), handle_gns_resolution_result(), and process_record().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_builder_add_query()

int GNUNET_DNSPARSER_builder_add_query ( char *  dst,
size_t  dst_len,
size_t *  off,
const struct GNUNET_DNSPARSER_Query query 
)

Add a DNS query to the UDP packet at the given location.

Parameters
dstwhere to write the query
dst_lennumber of bytes in dst
offpointer to offset where to write the query (increment by bytes used) must not be changed if there is an error
queryquery to write
Returns
GNUNET_SYSERR if query is invalid GNUNET_NO if query did not fit GNUNET_OK if query was added to dst

Definition at line 966 of file dnsparser.c.

970 {
971  int ret;
972  struct GNUNET_TUN_DnsQueryLine ql;
973 
975  dst_len
976  - sizeof(
977  struct GNUNET_TUN_DnsQueryLine),
978  off,
979  query->name);
980  if (ret != GNUNET_OK)
981  return ret;
982  ql.type = htons (query->type);
983  ql.dns_traffic_class = htons (query->dns_traffic_class);
984  GNUNET_memcpy (&dst[*off], &ql, sizeof(ql));
985  (*off) += sizeof(ql);
986  return GNUNET_OK;
987 }
int GNUNET_DNSPARSER_builder_add_name(char *dst, size_t dst_len, size_t *off, const char *name)
Add a DNS name to the UDP packet at the given location, converting the name to IDNA notation as neces...
Definition: dnsparser.c:889
uint16_t dns_traffic_class
See GNUNET_TUN_DNS_CLASS_*.
uint16_t type
See GNUNET_DNSPARSER_TYPE_*.
char * name
Name of the record that the query is for (0-terminated).
DNS query prefix.

References GNUNET_DNSPARSER_Query::dns_traffic_class, GNUNET_TUN_DnsQueryLine::dns_traffic_class, GNUNET_DNSPARSER_builder_add_name(), GNUNET_memcpy, GNUNET_OK, GNUNET_DNSPARSER_Query::name, ret, GNUNET_DNSPARSER_Query::type, and GNUNET_TUN_DnsQueryLine::type.

Referenced by GNUNET_DNSPARSER_pack().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_builder_add_mx()

int GNUNET_DNSPARSER_builder_add_mx ( char *  dst,
size_t  dst_len,
size_t *  off,
const struct GNUNET_DNSPARSER_MxRecord mx 
)

Add an MX record to the UDP packet at the given location.

Parameters
dstwhere to write the mx record
dst_lennumber of bytes in dst
offpointer to offset where to write the mx information (increment by bytes used); can also change if there was an error
mxmx information to write
Returns
GNUNET_SYSERR if mx is invalid GNUNET_NO if mx did not fit GNUNET_OK if mx was added to dst

Definition at line 1003 of file dnsparser.c.

1007 {
1008  uint16_t mxpref;
1009 
1010  if (*off + sizeof(uint16_t) > dst_len)
1011  return GNUNET_NO;
1012  mxpref = htons (mx->preference);
1013  GNUNET_memcpy (&dst[*off], &mxpref, sizeof(mxpref));
1014  (*off) += sizeof(mxpref);
1015  return GNUNET_DNSPARSER_builder_add_name (dst, dst_len, off, mx->mxhost);
1016 }
char * mxhost
Name of the mail server.
uint16_t preference
Preference for this entry (lower value is higher preference).

References GNUNET_DNSPARSER_builder_add_name(), GNUNET_memcpy, GNUNET_NO, GNUNET_DNSPARSER_MxRecord::mxhost, and GNUNET_DNSPARSER_MxRecord::preference.

Referenced by add_record(), dns_result_parser(), dns_string_to_value(), handle_gns_resolution_result(), and process_record().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_builder_add_soa()

int GNUNET_DNSPARSER_builder_add_soa ( char *  dst,
size_t  dst_len,
size_t *  off,
const struct GNUNET_DNSPARSER_SoaRecord soa 
)

Add an SOA record to the UDP packet at the given location.

Parameters
dstwhere to write the SOA record
dst_lennumber of bytes in dst
offpointer to offset where to write the SOA information (increment by bytes used) can also change if there was an error
soaSOA information to write
Returns
GNUNET_SYSERR if soa is invalid GNUNET_NO if soa did not fit GNUNET_OK if soa was added to dst

Definition at line 1079 of file dnsparser.c.

1083 {
1084  struct GNUNET_TUN_DnsSoaRecord sd;
1085  int ret;
1086 
1087  if ((GNUNET_OK !=
1088  (ret =
1089  GNUNET_DNSPARSER_builder_add_name (dst, dst_len, off, soa->mname))) ||
1090  (GNUNET_OK !=
1091  (ret =
1092  GNUNET_DNSPARSER_builder_add_name (dst, dst_len, off, soa->rname))))
1093  return ret;
1094  if (*off + sizeof(struct GNUNET_TUN_DnsSoaRecord) > dst_len)
1095  return GNUNET_NO;
1096  sd.serial = htonl (soa->serial);
1097  sd.refresh = htonl (soa->refresh);
1098  sd.retry = htonl (soa->retry);
1099  sd.expire = htonl (soa->expire);
1100  sd.minimum = htonl (soa->minimum_ttl);
1101  GNUNET_memcpy (&dst[*off], &sd, sizeof(sd));
1102  (*off) += sizeof(sd);
1103  return GNUNET_OK;
1104 }
uint32_t retry
Time interval that should elapse before a failed refresh should be retried.
char * mname
The domainname of the name server that was the original or primary source of data for this zone.
uint32_t refresh
Time interval before the zone should be refreshed.
uint32_t minimum_ttl
The bit minimum TTL field that should be exported with any RR from this zone.
char * rname
A domainname which specifies the mailbox of the person responsible for this zone.
uint32_t expire
Time value that specifies the upper limit on the time interval that can elapse before the zone is no ...
uint32_t serial
The version number of the original copy of the zone.
Payload of DNS SOA record (header).

References GNUNET_DNSPARSER_SoaRecord::expire, GNUNET_TUN_DnsSoaRecord::expire, GNUNET_DNSPARSER_builder_add_name(), GNUNET_memcpy, GNUNET_NO, GNUNET_OK, GNUNET_TUN_DnsSoaRecord::minimum, GNUNET_DNSPARSER_SoaRecord::minimum_ttl, GNUNET_DNSPARSER_SoaRecord::mname, GNUNET_DNSPARSER_SoaRecord::refresh, GNUNET_TUN_DnsSoaRecord::refresh, ret, GNUNET_DNSPARSER_SoaRecord::retry, GNUNET_TUN_DnsSoaRecord::retry, GNUNET_DNSPARSER_SoaRecord::rname, GNUNET_DNSPARSER_SoaRecord::serial, and GNUNET_TUN_DnsSoaRecord::serial.

Referenced by add_record(), dns_result_parser(), dns_string_to_value(), handle_gns_resolution_result(), and process_record().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_builder_add_cert()

int GNUNET_DNSPARSER_builder_add_cert ( char *  dst,
size_t  dst_len,
size_t *  off,
const struct GNUNET_DNSPARSER_CertRecord cert 
)

Add CERT record to the UDP packet at the given location.

Parameters
dstwhere to write the CERT record
dst_lennumber of bytes in dst
offpointer to offset where to write the CERT information (increment by bytes used) can also change if there was an error
certCERT information to write
Returns
GNUNET_SYSERR if soa is invalid GNUNET_NO if soa did not fit GNUNET_OK if soa was added to dst

Add CERT record to the UDP packet at the given location.

Parameters
dstwhere to write the CERT record
dst_lennumber of bytes in dst
offpointer to offset where to write the CERT information (increment by bytes used); can also change if there was an error
certCERT information to write
Returns
GNUNET_SYSERR if cert is invalid GNUNET_NO if cert did not fit GNUNET_OK if cert was added to dst

Definition at line 1032 of file dnsparser.c.

1037 {
1038  struct GNUNET_TUN_DnsCertRecord dcert;
1039 
1040 #ifdef __clang__
1041 #pragma clang diagnostic push
1042 #pragma clang diagnostic ignored "-Wtautological-constant-out-of-range-compare"
1043 #endif
1044  if ((cert->cert_type > UINT16_MAX) || (cert->algorithm > UINT8_MAX))
1045  {
1046  GNUNET_break (0);
1047  return GNUNET_SYSERR;
1048  }
1049 #ifdef __clang__
1050 #pragma clang diagnostic pop
1051 #endif
1052  if (*off + sizeof(struct GNUNET_TUN_DnsCertRecord) + cert->certificate_size >
1053  dst_len)
1054  return GNUNET_NO;
1055  dcert.cert_type = htons ((uint16_t) cert->cert_type);
1056  dcert.cert_tag = htons ((uint16_t) cert->cert_tag);
1057  dcert.algorithm = (uint8_t) cert->algorithm;
1058  GNUNET_memcpy (&dst[*off], &dcert, sizeof(dcert));
1059  (*off) += sizeof(dcert);
1060  GNUNET_memcpy (&dst[*off], cert->certificate_data, cert->certificate_size);
1061  (*off) += cert->certificate_size;
1062  return GNUNET_OK;
1063 }
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
enum GNUNET_DNSPARSER_CertType cert_type
Certificate type.
char * certificate_data
Data of the certificate.
enum GNUNET_DNSPARSER_CertAlgorithm algorithm
Algorithm.
size_t certificate_size
Number of bytes in certificate_data.
uint16_t cert_tag
Certificate KeyTag.
Payload of DNS CERT record.

References GNUNET_DNSPARSER_CertRecord::algorithm, GNUNET_TUN_DnsCertRecord::algorithm, GNUNET_DNSPARSER_CertRecord::cert_tag, GNUNET_TUN_DnsCertRecord::cert_tag, GNUNET_DNSPARSER_CertRecord::cert_type, GNUNET_TUN_DnsCertRecord::cert_type, GNUNET_DNSPARSER_CertRecord::certificate_data, GNUNET_DNSPARSER_CertRecord::certificate_size, GNUNET_break, GNUNET_memcpy, GNUNET_NO, GNUNET_OK, and GNUNET_SYSERR.

Referenced by add_record(), dns_string_to_value(), and process_record().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_builder_add_srv()

int GNUNET_DNSPARSER_builder_add_srv ( char *  dst,
size_t  dst_len,
size_t *  off,
const struct GNUNET_DNSPARSER_SrvRecord srv 
)

Add an SRV record to the UDP packet at the given location.

Parameters
dstwhere to write the SRV record
dst_lennumber of bytes in dst
offpointer to offset where to write the SRV information (increment by bytes used) can also change if there was an error
srvSRV information to write
Returns
GNUNET_SYSERR if srv is invalid GNUNET_NO if srv did not fit GNUNET_OK if srv was added to dst

Definition at line 1120 of file dnsparser.c.

1124 {
1125  struct GNUNET_TUN_DnsSrvRecord sd;
1126  int ret;
1127 
1128  if (*off + sizeof(struct GNUNET_TUN_DnsSrvRecord) > dst_len)
1129  return GNUNET_NO;
1130  sd.prio = htons (srv->priority);
1131  sd.weight = htons (srv->weight);
1132  sd.port = htons (srv->port);
1133  GNUNET_memcpy (&dst[*off], &sd, sizeof(sd));
1134  (*off) += sizeof(sd);
1135  if (GNUNET_OK !=
1136  (ret =
1137  GNUNET_DNSPARSER_builder_add_name (dst, dst_len, off, srv->target)))
1138  return ret;
1139  return GNUNET_OK;
1140 }
uint16_t port
TCP or UDP port of the service.
uint16_t weight
Relative weight for records with the same priority.
uint16_t priority
Preference for this entry (lower value is higher preference).
char * target
Hostname offering the service.
Payload of DNS SRV record (header).

References GNUNET_DNSPARSER_builder_add_name(), GNUNET_memcpy, GNUNET_NO, GNUNET_OK, GNUNET_DNSPARSER_SrvRecord::port, GNUNET_TUN_DnsSrvRecord::port, GNUNET_TUN_DnsSrvRecord::prio, GNUNET_DNSPARSER_SrvRecord::priority, ret, GNUNET_DNSPARSER_SrvRecord::target, GNUNET_DNSPARSER_SrvRecord::weight, and GNUNET_TUN_DnsSrvRecord::weight.

Referenced by add_record(), dns_result_parser(), dns_string_to_value(), handle_gns_resolution_result(), and process_record().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_parse_record()

int GNUNET_DNSPARSER_parse_record ( const char *  udp_payload,
size_t  udp_payload_length,
size_t *  off,
struct GNUNET_DNSPARSER_Record r 
)

Parse a DNS record entry.

Parameters
udp_payloadentire UDP payload
udp_payload_lengthlength of udp_payload
offpointer to the offset of the record to parse in the udp_payload (to be incremented by the size of the record)
rwhere to write the record information
Returns
GNUNET_OK on success, GNUNET_SYSERR if the record is malformed

Definition at line 559 of file dnsparser.c.

563 {
564  char *name;
565  struct GNUNET_TUN_DnsRecordLine rl;
566  size_t old_off;
567  uint16_t data_len;
568 
569  name = GNUNET_DNSPARSER_parse_name (udp_payload, udp_payload_length, off);
570  if (NULL == name)
571  {
572  GNUNET_break_op (0);
573  return GNUNET_SYSERR;
574  }
575  r->name = name;
576  if (*off + sizeof(struct GNUNET_TUN_DnsRecordLine) > udp_payload_length)
577  {
578  GNUNET_break_op (0);
579  return GNUNET_SYSERR;
580  }
581  GNUNET_memcpy (&rl, &udp_payload[*off], sizeof(rl));
582  (*off) += sizeof(rl);
583  r->type = ntohs (rl.type);
584  r->dns_traffic_class = ntohs (rl.dns_traffic_class);
587  data_len = ntohs (rl.data_len);
588  if (*off + data_len > udp_payload_length)
589  {
590  GNUNET_break_op (0);
591  return GNUNET_SYSERR;
592  }
593  old_off = *off;
594  switch (r->type)
595  {
600  r->data.hostname =
601  GNUNET_DNSPARSER_parse_name (udp_payload, udp_payload_length, off);
602  if ((NULL == r->data.hostname) || (old_off + data_len != *off))
603  return GNUNET_SYSERR;
604  return GNUNET_OK;
605 
607  r->data.soa =
608  GNUNET_DNSPARSER_parse_soa (udp_payload, udp_payload_length, off);
609  if ((NULL == r->data.soa) || (old_off + data_len != *off))
610  {
611  GNUNET_break_op (0);
612  return GNUNET_SYSERR;
613  }
614  return GNUNET_OK;
615 
617  r->data.mx =
618  GNUNET_DNSPARSER_parse_mx (udp_payload, udp_payload_length, off);
619  if ((NULL == r->data.mx) || (old_off + data_len != *off))
620  {
621  GNUNET_break_op (0);
622  return GNUNET_SYSERR;
623  }
624  return GNUNET_OK;
625 
627  r->data.srv =
628  GNUNET_DNSPARSER_parse_srv (udp_payload, udp_payload_length, off);
629  if ((NULL == r->data.srv) || (old_off + data_len != *off))
630  {
631  GNUNET_break_op (0);
632  return GNUNET_SYSERR;
633  }
634  return GNUNET_OK;
635 
636  default:
638  r->data.raw.data_len = data_len;
639  GNUNET_memcpy (r->data.raw.data, &udp_payload[*off], data_len);
640  break;
641  }
642  (*off) += data_len;
643  return GNUNET_OK;
644 }
struct GNUNET_DNSPARSER_SoaRecord * GNUNET_DNSPARSER_parse_soa(const char *udp_payload, size_t udp_payload_length, size_t *off)
Parse a DNS SOA record.
Definition: dnsparser.c:391
#define GNUNET_DNSPARSER_TYPE_SRV
#define GNUNET_DNSPARSER_TYPE_SOA
#define GNUNET_DNSPARSER_TYPE_PTR
struct GNUNET_DNSPARSER_MxRecord * GNUNET_DNSPARSER_parse_mx(const char *udp_payload, size_t udp_payload_length, size_t *off)
Parse a DNS MX record.
Definition: dnsparser.c:436
#define GNUNET_DNSPARSER_TYPE_NS
#define GNUNET_DNSPARSER_TYPE_CNAME
#define GNUNET_DNSPARSER_TYPE_DNAME
struct GNUNET_DNSPARSER_SrvRecord * GNUNET_DNSPARSER_parse_srv(const char *udp_payload, size_t udp_payload_length, size_t *off)
Parse a DNS SRV record.
Definition: dnsparser.c:477
#define GNUNET_DNSPARSER_TYPE_MX
char * GNUNET_DNSPARSER_parse_name(const char *udp_payload, size_t udp_payload_length, size_t *off)
Parse name inside of a DNS query or record.
Definition: dnsparser.c:334
#define GNUNET_TIME_UNIT_SECONDS
One second.
struct GNUNET_TIME_Absolute GNUNET_TIME_relative_to_absolute(struct GNUNET_TIME_Relative rel)
Convert relative time to an absolute time in the future.
Definition: time.c:315
struct GNUNET_TIME_Relative GNUNET_TIME_relative_multiply(struct GNUNET_TIME_Relative rel, unsigned long long factor)
Multiply relative time by a given factor.
Definition: time.c:483
void * data
Binary record data.
size_t data_len
Number of bytes in data.
uint16_t dns_traffic_class
See GNUNET_TUN_DNS_CLASS_*.
struct GNUNET_DNSPARSER_SoaRecord * soa
SOA data for SOA records.
struct GNUNET_DNSPARSER_SrvRecord * srv
SRV data for SRV records.
struct GNUNET_DNSPARSER_MxRecord * mx
MX data for MX records.
char * hostname
For NS, CNAME and PTR records, this is the uncompressed 0-terminated hostname.
uint16_t type
See GNUNET_DNSPARSER_TYPE_*.
struct GNUNET_TIME_Absolute expiration_time
When does the record expire?
union GNUNET_DNSPARSER_Record::@24 data
Payload of the record (which one of these is valid depends on the 'type').
char * name
Name of the record that the query is for (0-terminated).
struct GNUNET_DNSPARSER_RawRecord raw
Raw data for all other types.
General DNS record prefix.
uint16_t data_len
Number of bytes of data that follow.

References GNUNET_DNSPARSER_RawRecord::data, GNUNET_DNSPARSER_Record::data, GNUNET_DNSPARSER_RawRecord::data_len, GNUNET_TUN_DnsRecordLine::data_len, GNUNET_DNSPARSER_Record::dns_traffic_class, GNUNET_TUN_DnsRecordLine::dns_traffic_class, GNUNET_DNSPARSER_Record::expiration_time, GNUNET_break_op, GNUNET_DNSPARSER_parse_mx(), GNUNET_DNSPARSER_parse_name(), GNUNET_DNSPARSER_parse_soa(), GNUNET_DNSPARSER_parse_srv(), GNUNET_DNSPARSER_TYPE_CNAME, GNUNET_DNSPARSER_TYPE_DNAME, GNUNET_DNSPARSER_TYPE_MX, GNUNET_DNSPARSER_TYPE_NS, GNUNET_DNSPARSER_TYPE_PTR, GNUNET_DNSPARSER_TYPE_SOA, GNUNET_DNSPARSER_TYPE_SRV, GNUNET_malloc, GNUNET_memcpy, GNUNET_OK, GNUNET_SYSERR, GNUNET_TIME_relative_multiply(), GNUNET_TIME_relative_to_absolute(), GNUNET_TIME_UNIT_SECONDS, GNUNET_DNSPARSER_Record::hostname, GNUNET_DNSPARSER_Record::mx, name, GNUNET_DNSPARSER_Record::name, GNUNET_DNSPARSER_Record::raw, GNUNET_DNSPARSER_Record::soa, GNUNET_DNSPARSER_Record::srv, GNUNET_TUN_DnsRecordLine::ttl, GNUNET_DNSPARSER_Record::type, and GNUNET_TUN_DnsRecordLine::type.

Referenced by GNUNET_DNSPARSER_parse().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_parse_name()

char* GNUNET_DNSPARSER_parse_name ( const char *  udp_payload,
size_t  udp_payload_length,
size_t *  off 
)

Parse name inside of a DNS query or record.

Parameters
udp_payloadentire UDP payload
udp_payload_lengthlength of udp_payload
offpointer to the offset of the name to parse in the udp_payload (to be incremented by the size of the name)
Returns
name as 0-terminated C string on success, NULL if the payload is malformed

Definition at line 334 of file dnsparser.c.

337 {
338  return parse_name (udp_payload, udp_payload_length, off, 0);
339 }
static char * parse_name(const char *udp_payload, size_t udp_payload_length, size_t *off, unsigned int depth)
Parse name inside of a DNS query or record.
Definition: dnsparser.c:214

References parse_name().

Referenced by dns_value_to_string(), gns_value_to_string(), GNUNET_DNSPARSER_parse_mx(), GNUNET_DNSPARSER_parse_query(), GNUNET_DNSPARSER_parse_record(), GNUNET_DNSPARSER_parse_soa(), GNUNET_DNSPARSER_parse_srv(), handle_gns_resolution_result(), recursive_cname_resolution(), recursive_gns2dns_resolution(), and reply_to_dns().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_parse_query()

int GNUNET_DNSPARSER_parse_query ( const char *  udp_payload,
size_t  udp_payload_length,
size_t *  off,
struct GNUNET_DNSPARSER_Query q 
)

Parse a DNS query entry.

Parameters
udp_payloadentire UDP payload
udp_payload_lengthlength of udp_payload
offpointer to the offset of the query to parse in the udp_payload (to be incremented by the size of the query)
qwhere to write the query information
Returns
GNUNET_OK on success, GNUNET_SYSERR if the query is malformed

Definition at line 353 of file dnsparser.c.

357 {
358  char *name;
359  struct GNUNET_TUN_DnsQueryLine ql;
360 
361  name = GNUNET_DNSPARSER_parse_name (udp_payload, udp_payload_length, off);
362  if (NULL == name)
363  {
364  GNUNET_break_op (0);
365  return GNUNET_SYSERR;
366  }
367  q->name = name;
368  if (*off + sizeof(struct GNUNET_TUN_DnsQueryLine) > udp_payload_length)
369  {
370  GNUNET_break_op (0);
371  return GNUNET_SYSERR;
372  }
373  GNUNET_memcpy (&ql, &udp_payload[*off], sizeof(ql));
374  *off += sizeof(ql);
375  q->type = ntohs (ql.type);
376  q->dns_traffic_class = ntohs (ql.dns_traffic_class);
377  return GNUNET_OK;
378 }
static struct GNUNET_REVOCATION_Query * q
Handle for revocation query.

References GNUNET_TUN_DnsQueryLine::dns_traffic_class, GNUNET_break_op, GNUNET_DNSPARSER_parse_name(), GNUNET_memcpy, GNUNET_OK, GNUNET_SYSERR, name, q, and GNUNET_TUN_DnsQueryLine::type.

Referenced by GNUNET_DNSPARSER_parse().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_parse_soa()

struct GNUNET_DNSPARSER_SoaRecord* GNUNET_DNSPARSER_parse_soa ( const char *  udp_payload,
size_t  udp_payload_length,
size_t *  off 
)

Parse a DNS SOA record.

Parameters
udp_payloadreference to UDP packet
udp_payload_lengthlength of udp_payload
offpointer to the offset of the query to parse in the SOA record (to be incremented by the size of the record), unchanged on error
Returns
the parsed SOA record, NULL on error

Definition at line 391 of file dnsparser.c.

394 {
395  struct GNUNET_DNSPARSER_SoaRecord *soa;
396  struct GNUNET_TUN_DnsSoaRecord soa_bin;
397  size_t old_off;
398 
399  old_off = *off;
400  soa = GNUNET_new (struct GNUNET_DNSPARSER_SoaRecord);
401  soa->mname =
402  GNUNET_DNSPARSER_parse_name (udp_payload, udp_payload_length, off);
403  soa->rname =
404  GNUNET_DNSPARSER_parse_name (udp_payload, udp_payload_length, off);
405  if ((NULL == soa->mname) || (NULL == soa->rname) ||
406  (*off + sizeof(struct GNUNET_TUN_DnsSoaRecord) > udp_payload_length))
407  {
408  GNUNET_break_op (0);
410  *off = old_off;
411  return NULL;
412  }
413  GNUNET_memcpy (&soa_bin,
414  &udp_payload[*off],
415  sizeof(struct GNUNET_TUN_DnsSoaRecord));
416  soa->serial = ntohl (soa_bin.serial);
417  soa->refresh = ntohl (soa_bin.refresh);
418  soa->retry = ntohl (soa_bin.retry);
419  soa->expire = ntohl (soa_bin.expire);
420  soa->minimum_ttl = ntohl (soa_bin.minimum);
421  (*off) += sizeof(struct GNUNET_TUN_DnsSoaRecord);
422  return soa;
423 }
void GNUNET_DNSPARSER_free_soa(struct GNUNET_DNSPARSER_SoaRecord *soa)
Free SOA information record.
Definition: dnsparser.c:108
Information from SOA records (RFC 1035).

References GNUNET_DNSPARSER_SoaRecord::expire, GNUNET_TUN_DnsSoaRecord::expire, GNUNET_break_op, GNUNET_DNSPARSER_free_soa(), GNUNET_DNSPARSER_parse_name(), GNUNET_memcpy, GNUNET_new, GNUNET_TUN_DnsSoaRecord::minimum, GNUNET_DNSPARSER_SoaRecord::minimum_ttl, GNUNET_DNSPARSER_SoaRecord::mname, GNUNET_DNSPARSER_SoaRecord::refresh, GNUNET_TUN_DnsSoaRecord::refresh, GNUNET_DNSPARSER_SoaRecord::retry, GNUNET_TUN_DnsSoaRecord::retry, GNUNET_DNSPARSER_SoaRecord::rname, GNUNET_DNSPARSER_SoaRecord::serial, and GNUNET_TUN_DnsSoaRecord::serial.

Referenced by dns_value_to_string(), GNUNET_DNSPARSER_parse_record(), handle_gns_resolution_result(), and reply_to_dns().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_parse_cert()

struct GNUNET_DNSPARSER_CertRecord* GNUNET_DNSPARSER_parse_cert ( const char *  udp_payload,
size_t  udp_payload_length,
size_t *  off 
)

Parse a DNS CERT record.

Parameters
udp_payloadreference to UDP packet
udp_payload_lengthlength of udp_payload
offpointer to the offset of the query to parse in the CERT record (to be incremented by the size of the record), unchanged on error
Returns
the parsed CERT record, NULL on error

Definition at line 518 of file dnsparser.c.

521 {
522  struct GNUNET_DNSPARSER_CertRecord *cert;
523  struct GNUNET_TUN_DnsCertRecord dcert;
524 
525  if (*off + sizeof(struct GNUNET_TUN_DnsCertRecord) >= udp_payload_length)
526  {
527  GNUNET_break_op (0);
528  return NULL;
529  }
530  GNUNET_memcpy (&dcert,
531  &udp_payload[*off],
532  sizeof(struct GNUNET_TUN_DnsCertRecord));
533  (*off) += sizeof(struct GNUNET_TUN_DnsCertRecord);
534  cert = GNUNET_new (struct GNUNET_DNSPARSER_CertRecord);
535  cert->cert_type = ntohs (dcert.cert_type);
536  cert->cert_tag = ntohs (dcert.cert_tag);
537  cert->algorithm = dcert.algorithm;
538  cert->certificate_size = udp_payload_length - (*off);
541  &udp_payload[*off],
542  cert->certificate_size);
543  (*off) += cert->certificate_size;
544  return cert;
545 }
Information from CERT records (RFC 4034).

References GNUNET_DNSPARSER_CertRecord::algorithm, GNUNET_TUN_DnsCertRecord::algorithm, GNUNET_DNSPARSER_CertRecord::cert_tag, GNUNET_TUN_DnsCertRecord::cert_tag, GNUNET_DNSPARSER_CertRecord::cert_type, GNUNET_TUN_DnsCertRecord::cert_type, GNUNET_DNSPARSER_CertRecord::certificate_data, GNUNET_DNSPARSER_CertRecord::certificate_size, GNUNET_break_op, GNUNET_malloc, GNUNET_memcpy, and GNUNET_new.

Referenced by dns_value_to_string().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_parse_mx()

struct GNUNET_DNSPARSER_MxRecord* GNUNET_DNSPARSER_parse_mx ( const char *  udp_payload,
size_t  udp_payload_length,
size_t *  off 
)

Parse a DNS MX record.

Parameters
udp_payloadreference to UDP packet
udp_payload_lengthlength of udp_payload
offpointer to the offset of the query to parse in the MX record (to be incremented by the size of the record), unchanged on error
Returns
the parsed MX record, NULL on error

Definition at line 436 of file dnsparser.c.

439 {
440  struct GNUNET_DNSPARSER_MxRecord *mx;
441  uint16_t mxpref;
442  size_t old_off;
443 
444  old_off = *off;
445  if (*off + sizeof(uint16_t) > udp_payload_length)
446  {
447  GNUNET_break_op (0);
448  return NULL;
449  }
450  GNUNET_memcpy (&mxpref, &udp_payload[*off], sizeof(uint16_t));
451  (*off) += sizeof(uint16_t);
453  mx->preference = ntohs (mxpref);
454  mx->mxhost =
455  GNUNET_DNSPARSER_parse_name (udp_payload, udp_payload_length, off);
456  if (NULL == mx->mxhost)
457  {
458  GNUNET_break_op (0);
460  *off = old_off;
461  return NULL;
462  }
463  return mx;
464 }
void GNUNET_DNSPARSER_free_mx(struct GNUNET_DNSPARSER_MxRecord *mx)
Free MX information record.
Definition: dnsparser.c:154
Information from MX records (RFC 1035).

References GNUNET_break_op, GNUNET_DNSPARSER_free_mx(), GNUNET_DNSPARSER_parse_name(), GNUNET_memcpy, GNUNET_new, GNUNET_DNSPARSER_MxRecord::mxhost, and GNUNET_DNSPARSER_MxRecord::preference.

Referenced by dns_value_to_string(), GNUNET_DNSPARSER_parse_record(), handle_gns_resolution_result(), and reply_to_dns().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_parse_srv()

struct GNUNET_DNSPARSER_SrvRecord* GNUNET_DNSPARSER_parse_srv ( const char *  udp_payload,
size_t  udp_payload_length,
size_t *  off 
)

Parse a DNS SRV record.

Parameters
udp_payloadreference to UDP packet
udp_payload_lengthlength of udp_payload
offpointer to the offset of the query to parse in the SRV record (to be incremented by the size of the record), unchanged on error
Returns
the parsed SRV record, NULL on error

Definition at line 477 of file dnsparser.c.

480 {
481  struct GNUNET_DNSPARSER_SrvRecord *srv;
482  struct GNUNET_TUN_DnsSrvRecord srv_bin;
483  size_t old_off;
484 
485  old_off = *off;
486  if (*off + sizeof(struct GNUNET_TUN_DnsSrvRecord) > udp_payload_length)
487  return NULL;
488  GNUNET_memcpy (&srv_bin,
489  &udp_payload[*off],
490  sizeof(struct GNUNET_TUN_DnsSrvRecord));
491  (*off) += sizeof(struct GNUNET_TUN_DnsSrvRecord);
492  srv = GNUNET_new (struct GNUNET_DNSPARSER_SrvRecord);
493  srv->priority = ntohs (srv_bin.prio);
494  srv->weight = ntohs (srv_bin.weight);
495  srv->port = ntohs (srv_bin.port);
496  srv->target =
497  GNUNET_DNSPARSER_parse_name (udp_payload, udp_payload_length, off);
498  if (NULL == srv->target)
499  {
501  *off = old_off;
502  return NULL;
503  }
504  return srv;
505 }
void GNUNET_DNSPARSER_free_srv(struct GNUNET_DNSPARSER_SrvRecord *srv)
Free SRV information record.
Definition: dnsparser.c:139
Information from SRV records (RFC 2782).

References GNUNET_DNSPARSER_free_srv(), GNUNET_DNSPARSER_parse_name(), GNUNET_memcpy, GNUNET_new, GNUNET_DNSPARSER_SrvRecord::port, GNUNET_TUN_DnsSrvRecord::port, GNUNET_TUN_DnsSrvRecord::prio, GNUNET_DNSPARSER_SrvRecord::priority, GNUNET_DNSPARSER_SrvRecord::target, GNUNET_DNSPARSER_SrvRecord::weight, and GNUNET_TUN_DnsSrvRecord::weight.

Referenced by dns_value_to_string(), GNUNET_DNSPARSER_parse_record(), and handle_gns_resolution_result().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_duplicate_record()

struct GNUNET_DNSPARSER_Record* GNUNET_DNSPARSER_duplicate_record ( const struct GNUNET_DNSPARSER_Record r)

Duplicate (deep-copy) the given DNS record.

Parameters
rthe record
Returns
the newly allocated record

Definition at line 737 of file dnsparser.c.

738 {
739  struct GNUNET_DNSPARSER_Record *dup = GNUNET_memdup (r, sizeof(*r));
740 
741  dup->name = GNUNET_strdup (r->name);
742  switch (r->type)
743  {
748  break;
749  }
750 
753  break;
754  }
755 
758  break;
759  }
760 
763  break;
764  }
765 
768  break;
769  }
770 
771  default: {
772  dup->data.raw.data = GNUNET_memdup (r->data.raw.data,
773  r->data.raw.data_len);
774  }
775  }
776  return dup;
777 }
struct GNUNET_DNSPARSER_SrvRecord * GNUNET_DNSPARSER_duplicate_srv_record(const struct GNUNET_DNSPARSER_SrvRecord *r)
Duplicate (deep-copy) the given DNS record.
Definition: dnsparser.c:838
#define GNUNET_DNSPARSER_TYPE_CERT
struct GNUNET_DNSPARSER_MxRecord * GNUNET_DNSPARSER_duplicate_mx_record(const struct GNUNET_DNSPARSER_MxRecord *r)
Duplicate (deep-copy) the given DNS record.
Definition: dnsparser.c:822
struct GNUNET_DNSPARSER_SoaRecord * GNUNET_DNSPARSER_duplicate_soa_record(const struct GNUNET_DNSPARSER_SoaRecord *r)
Duplicate (deep-copy) the given DNS record.
Definition: dnsparser.c:787
struct GNUNET_DNSPARSER_CertRecord * GNUNET_DNSPARSER_duplicate_cert_record(const struct GNUNET_DNSPARSER_CertRecord *r)
Duplicate (deep-copy) the given DNS record.
Definition: dnsparser.c:805
#define GNUNET_memdup(buf, size)
Allocate and initialize a block of memory.
struct GNUNET_DNSPARSER_CertRecord * cert
CERT data for CERT records.

References GNUNET_DNSPARSER_Record::cert, GNUNET_DNSPARSER_RawRecord::data, GNUNET_DNSPARSER_Record::data, GNUNET_DNSPARSER_RawRecord::data_len, GNUNET_DNSPARSER_duplicate_cert_record(), GNUNET_DNSPARSER_duplicate_mx_record(), GNUNET_DNSPARSER_duplicate_soa_record(), GNUNET_DNSPARSER_duplicate_srv_record(), GNUNET_DNSPARSER_TYPE_CERT, GNUNET_DNSPARSER_TYPE_CNAME, GNUNET_DNSPARSER_TYPE_MX, GNUNET_DNSPARSER_TYPE_NS, GNUNET_DNSPARSER_TYPE_PTR, GNUNET_DNSPARSER_TYPE_SOA, GNUNET_DNSPARSER_TYPE_SRV, GNUNET_memdup, GNUNET_strdup, GNUNET_DNSPARSER_Record::hostname, GNUNET_DNSPARSER_Record::mx, GNUNET_DNSPARSER_Record::name, GNUNET_DNSPARSER_Record::raw, GNUNET_DNSPARSER_Record::soa, GNUNET_DNSPARSER_Record::srv, and GNUNET_DNSPARSER_Record::type.

Referenced by cache_answers().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_duplicate_soa_record()

struct GNUNET_DNSPARSER_SoaRecord* GNUNET_DNSPARSER_duplicate_soa_record ( const struct GNUNET_DNSPARSER_SoaRecord r)

Duplicate (deep-copy) the given DNS record.

Parameters
rthe record
Returns
the newly allocated record

Definition at line 787 of file dnsparser.c.

789 {
790  struct GNUNET_DNSPARSER_SoaRecord *dup = GNUNET_memdup (r, sizeof(*r));
791 
792  dup->mname = GNUNET_strdup (r->mname);
793  dup->rname = GNUNET_strdup (r->rname);
794  return dup;
795 }

References GNUNET_memdup, GNUNET_strdup, GNUNET_DNSPARSER_SoaRecord::mname, and GNUNET_DNSPARSER_SoaRecord::rname.

Referenced by GNUNET_DNSPARSER_duplicate_record().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_duplicate_cert_record()

struct GNUNET_DNSPARSER_CertRecord* GNUNET_DNSPARSER_duplicate_cert_record ( const struct GNUNET_DNSPARSER_CertRecord r)

Duplicate (deep-copy) the given DNS record.

Parameters
rthe record
Returns
the newly allocated record

Definition at line 805 of file dnsparser.c.

807 {
808  struct GNUNET_DNSPARSER_CertRecord *dup = GNUNET_memdup (r, sizeof(*r));
809 
811  return dup;
812 }

References GNUNET_DNSPARSER_CertRecord::certificate_data, GNUNET_memdup, and GNUNET_strdup.

Referenced by GNUNET_DNSPARSER_duplicate_record().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_duplicate_mx_record()

struct GNUNET_DNSPARSER_MxRecord* GNUNET_DNSPARSER_duplicate_mx_record ( const struct GNUNET_DNSPARSER_MxRecord r)

Duplicate (deep-copy) the given DNS record.

Parameters
rthe record
Returns
the newly allocated record

Definition at line 822 of file dnsparser.c.

823 {
824  struct GNUNET_DNSPARSER_MxRecord *dup = GNUNET_memdup (r, sizeof(*r));
825 
826  dup->mxhost = GNUNET_strdup (r->mxhost);
827  return dup;
828 }

References GNUNET_memdup, GNUNET_strdup, and GNUNET_DNSPARSER_MxRecord::mxhost.

Referenced by GNUNET_DNSPARSER_duplicate_record().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_duplicate_srv_record()

struct GNUNET_DNSPARSER_SrvRecord* GNUNET_DNSPARSER_duplicate_srv_record ( const struct GNUNET_DNSPARSER_SrvRecord r)

Duplicate (deep-copy) the given DNS record.

Parameters
rthe record
Returns
the newly allocated record

Definition at line 838 of file dnsparser.c.

840 {
841  struct GNUNET_DNSPARSER_SrvRecord *dup = GNUNET_memdup (r, sizeof(*r));
842 
843  dup->target = GNUNET_strdup (r->target);
844  return dup;
845 }

References GNUNET_memdup, GNUNET_strdup, and GNUNET_DNSPARSER_SrvRecord::target.

Referenced by GNUNET_DNSPARSER_duplicate_record().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_free_record()

void GNUNET_DNSPARSER_free_record ( struct GNUNET_DNSPARSER_Record r)

Free the given DNS record.

Parameters
rrecord to free

Definition at line 169 of file dnsparser.c.

170 {
171  GNUNET_free (r->name);
172  switch (r->type)
173  {
176  break;
177 
180  break;
181 
184  break;
185 
188  break;
189 
194  break;
195 
196  default:
197  GNUNET_free (r->data.raw.data);
198  break;
199  }
200 }
void GNUNET_DNSPARSER_free_cert(struct GNUNET_DNSPARSER_CertRecord *cert)
Free CERT information record.
Definition: dnsparser.c:124

References GNUNET_DNSPARSER_Record::cert, GNUNET_DNSPARSER_RawRecord::data, GNUNET_DNSPARSER_Record::data, GNUNET_DNSPARSER_free_cert(), GNUNET_DNSPARSER_free_mx(), GNUNET_DNSPARSER_free_soa(), GNUNET_DNSPARSER_free_srv(), GNUNET_DNSPARSER_TYPE_CERT, GNUNET_DNSPARSER_TYPE_CNAME, GNUNET_DNSPARSER_TYPE_MX, GNUNET_DNSPARSER_TYPE_NS, GNUNET_DNSPARSER_TYPE_PTR, GNUNET_DNSPARSER_TYPE_SOA, GNUNET_DNSPARSER_TYPE_SRV, GNUNET_free, GNUNET_DNSPARSER_Record::hostname, GNUNET_DNSPARSER_Record::mx, GNUNET_DNSPARSER_Record::name, GNUNET_DNSPARSER_Record::raw, GNUNET_DNSPARSER_Record::soa, GNUNET_DNSPARSER_Record::srv, and GNUNET_DNSPARSER_Record::type.

Referenced by free_cache_entry(), free_hosts_entry(), GNUNET_DNSPARSER_free_packet(), and remove_expired().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_free_mx()

void GNUNET_DNSPARSER_free_mx ( struct GNUNET_DNSPARSER_MxRecord mx)

Free MX information record.

Parameters
mxrecord to free

Definition at line 154 of file dnsparser.c.

155 {
156  if (NULL == mx)
157  return;
158  GNUNET_free (mx->mxhost);
159  GNUNET_free (mx);
160 }

References GNUNET_free, and GNUNET_DNSPARSER_MxRecord::mxhost.

Referenced by dns_value_to_string(), GNUNET_DNSPARSER_free_record(), GNUNET_DNSPARSER_parse_mx(), and handle_gns_resolution_result().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_free_srv()

void GNUNET_DNSPARSER_free_srv ( struct GNUNET_DNSPARSER_SrvRecord srv)

Free SRV information record.

Parameters
srvrecord to free

Definition at line 139 of file dnsparser.c.

140 {
141  if (NULL == srv)
142  return;
143  GNUNET_free (srv->target);
144  GNUNET_free (srv);
145 }

References GNUNET_free, and GNUNET_DNSPARSER_SrvRecord::target.

Referenced by dns_value_to_string(), GNUNET_DNSPARSER_free_record(), GNUNET_DNSPARSER_parse_srv(), and handle_gns_resolution_result().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_free_soa()

void GNUNET_DNSPARSER_free_soa ( struct GNUNET_DNSPARSER_SoaRecord soa)

Free SOA information record.

Parameters
soarecord to free

Definition at line 108 of file dnsparser.c.

109 {
110  if (NULL == soa)
111  return;
112  GNUNET_free (soa->mname);
113  GNUNET_free (soa->rname);
114  GNUNET_free (soa);
115 }

References GNUNET_free, GNUNET_DNSPARSER_SoaRecord::mname, and GNUNET_DNSPARSER_SoaRecord::rname.

Referenced by dns_value_to_string(), GNUNET_DNSPARSER_free_record(), GNUNET_DNSPARSER_parse_soa(), and handle_gns_resolution_result().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_free_cert()

void GNUNET_DNSPARSER_free_cert ( struct GNUNET_DNSPARSER_CertRecord cert)

Free CERT information record.

Parameters
certrecord to free

Definition at line 124 of file dnsparser.c.

125 {
126  if (NULL == cert)
127  return;
129  GNUNET_free (cert);
130 }

References GNUNET_DNSPARSER_CertRecord::certificate_data, and GNUNET_free.

Referenced by dns_value_to_string(), and GNUNET_DNSPARSER_free_record().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_bin_to_hex()

char* GNUNET_DNSPARSER_bin_to_hex ( const void *  data,
size_t  data_size 
)

Convert a block of binary data to HEX.

Parameters
databinary data to convert
data_sizenumber of bytes in data
Returns
HEX string (lower case)

Definition at line 1356 of file dnsparser.c.

1357 {
1358  char *ret;
1359  size_t off;
1360  const uint8_t *idata;
1361 
1362  idata = data;
1363  ret = GNUNET_malloc (data_size * 2 + 1);
1364  for (off = 0; off < data_size; off++)
1365  sprintf (&ret[off * 2], "%02x", idata[off]);
1366  return ret;
1367 }
static size_t data_size
Number of bytes in data.
Definition: gnunet-abd.c:187
uint32_t data
The data value.

References data, data_size, GNUNET_malloc, and ret.

Referenced by dns_value_to_string().

Here is the caller graph for this function:

◆ GNUNET_DNSPARSER_hex_to_bin()

size_t GNUNET_DNSPARSER_hex_to_bin ( const char *  hex,
void *  data 
)

Convert a HEX string to block of binary data.

Parameters
hexHEX string to convert (may contain mixed case)
datawhere to write result, must be at least strlen(hex)/2 bytes long
Returns
number of bytes written to data

Definition at line 1379 of file dnsparser.c.

1380 {
1381  size_t data_size;
1382  size_t off;
1383  uint8_t *idata;
1384  unsigned int h;
1385  char in[3];
1386 
1387  data_size = strlen (hex) / 2;
1388  idata = data;
1389  in[2] = '\0';
1390  for (off = 0; off < data_size; off++)
1391  {
1392  in[0] = tolower ((unsigned char) hex[off * 2]);
1393  in[1] = tolower ((unsigned char) hex[off * 2 + 1]);
1394  if (1 != sscanf (in, "%x", &h))
1395  return off;
1396  idata[off] = (uint8_t) h;
1397  }
1398  return off;
1399 }
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:99

References data, data_size, and h.

Referenced by dns_string_to_value().

Here is the caller graph for this function: