GNUnet  0.10.x
Data Structures | Macros | Enumerations | Functions
DNS parser library

Helper library to parse DNS packets. More...

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 40 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 45 of file gnunet_dnsparser_lib.h.

Referenced by check_lookup(), check_ssl_certificate(), handle_lookup(), and recursive_gns2dns_resolution().

◆ GNUNET_DNSPARSER_TYPE_ANY

#define GNUNET_DNSPARSER_TYPE_ANY   0

A few common DNS types.

Definition at line 51 of file gnunet_dnsparser_lib.h.

◆ GNUNET_DNSPARSER_TYPE_A

#define GNUNET_DNSPARSER_TYPE_A   1

◆ GNUNET_DNSPARSER_TYPE_NS

#define GNUNET_DNSPARSER_TYPE_NS   2

◆ GNUNET_DNSPARSER_TYPE_CNAME

#define GNUNET_DNSPARSER_TYPE_CNAME   5

◆ GNUNET_DNSPARSER_TYPE_SOA

#define GNUNET_DNSPARSER_TYPE_SOA   6

◆ GNUNET_DNSPARSER_TYPE_PTR

#define GNUNET_DNSPARSER_TYPE_PTR   12

◆ GNUNET_DNSPARSER_TYPE_MX

#define GNUNET_DNSPARSER_TYPE_MX   15

◆ GNUNET_DNSPARSER_TYPE_TXT

#define GNUNET_DNSPARSER_TYPE_TXT   16

◆ GNUNET_DNSPARSER_TYPE_RP

#define GNUNET_DNSPARSER_TYPE_RP   17

Definition at line 59 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_AFSDB

#define GNUNET_DNSPARSER_TYPE_AFSDB   18

Definition at line 60 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_SIG

#define GNUNET_DNSPARSER_TYPE_SIG   24

Definition at line 61 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_KEY

#define GNUNET_DNSPARSER_TYPE_KEY   25

Definition at line 62 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_AAAA

#define GNUNET_DNSPARSER_TYPE_AAAA   28

◆ GNUNET_DNSPARSER_TYPE_LOC

#define GNUNET_DNSPARSER_TYPE_LOC   29

Definition at line 64 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_SRV

#define GNUNET_DNSPARSER_TYPE_SRV   33

◆ GNUNET_DNSPARSER_TYPE_NAPTR

#define GNUNET_DNSPARSER_TYPE_NAPTR   35

Definition at line 66 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_KX

#define GNUNET_DNSPARSER_TYPE_KX   36

Definition at line 67 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_CERT

#define GNUNET_DNSPARSER_TYPE_CERT   37

◆ GNUNET_DNSPARSER_TYPE_DNAME

#define GNUNET_DNSPARSER_TYPE_DNAME   39

Definition at line 69 of file gnunet_dnsparser_lib.h.

Referenced by GNUNET_DNSPARSER_parse_record(), and process_record().

◆ GNUNET_DNSPARSER_TYPE_APL

#define GNUNET_DNSPARSER_TYPE_APL   42

Definition at line 70 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_DS

#define GNUNET_DNSPARSER_TYPE_DS   43

Definition at line 71 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_SSHFP

#define GNUNET_DNSPARSER_TYPE_SSHFP   44

Definition at line 72 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_IPSECKEY

#define GNUNET_DNSPARSER_TYPE_IPSECKEY   45

Definition at line 73 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_RRSIG

#define GNUNET_DNSPARSER_TYPE_RRSIG   46

Definition at line 74 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_NSEC

#define GNUNET_DNSPARSER_TYPE_NSEC   47

Definition at line 75 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_DNSKEY

#define GNUNET_DNSPARSER_TYPE_DNSKEY   48

Definition at line 76 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_DHCID

#define GNUNET_DNSPARSER_TYPE_DHCID   49

Definition at line 77 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_NSEC3

#define GNUNET_DNSPARSER_TYPE_NSEC3   50

Definition at line 78 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_NSEC3PARAM

#define GNUNET_DNSPARSER_TYPE_NSEC3PARAM   51

Definition at line 79 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_TLSA

#define GNUNET_DNSPARSER_TYPE_TLSA   52

◆ GNUNET_DNSPARSER_TYPE_HIP

#define GNUNET_DNSPARSER_TYPE_HIP   55

Definition at line 81 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_CDS

#define GNUNET_DNSPARSER_TYPE_CDS   59

Definition at line 82 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_CDNSKEY

#define GNUNET_DNSPARSER_TYPE_CDNSKEY   60

Definition at line 83 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_OPENPGPKEY

#define GNUNET_DNSPARSER_TYPE_OPENPGPKEY   61

Definition at line 84 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_TKEY

#define GNUNET_DNSPARSER_TYPE_TKEY   249

Definition at line 85 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_TSIG

#define GNUNET_DNSPARSER_TYPE_TSIG   250

Definition at line 86 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_ALL

#define GNUNET_DNSPARSER_TYPE_ALL   255

◆ GNUNET_DNSPARSER_TYPE_URI

#define GNUNET_DNSPARSER_TYPE_URI   256

Definition at line 88 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

◆ GNUNET_DNSPARSER_TYPE_CAA

#define GNUNET_DNSPARSER_TYPE_CAA   257

Definition at line 89 of file gnunet_dnsparser_lib.h.

Referenced by dns_string_to_value(), and dns_value_to_string().

◆ GNUNET_DNSPARSER_TYPE_TA

#define GNUNET_DNSPARSER_TYPE_TA   32768

Definition at line 90 of file gnunet_dnsparser_lib.h.

Referenced by process_record().

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 174 of file gnunet_dnsparser_lib.h.

◆ 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 

GOST 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 226 of file gnunet_dnsparser_lib.h.

226  {
231 
236 
241 
246 
251 
256 
261 
266 
271 
276 
281 
286 
291 
296 };

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.

References GNUNET_OK, and GNUNET_SYSERR.

Referenced by GNUNET_DNSPARSER_check_name().

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 }
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
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◆ 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.

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

Referenced by queue(), and run().

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_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
const char * name
#define GNUNET_free(ptr)
Wrapper around free.
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◆ 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.

References GNUNET_TUN_DnsHeader::additional_rcount, GNUNET_DNSPARSER_Packet::additional_records, GNUNET_TUN_DnsHeader::answer_rcount, GNUNET_DNSPARSER_Packet::answers, GNUNET_TUN_DnsHeader::authority_rcount, GNUNET_DNSPARSER_Packet::authority_records, GNUNET_TUN_DnsHeader::flags, GNUNET_DNSPARSER_Packet::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, GNUNET_DNSPARSER_Packet::id, GNUNET_DNSPARSER_Packet::num_additional_records, GNUNET_DNSPARSER_Packet::num_answers, GNUNET_DNSPARSER_Packet::num_authority_records, GNUNET_DNSPARSER_Packet::num_queries, p, GNUNET_DNSPARSER_Packet::queries, 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().

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  {
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  {
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  {
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 }
struct GNUNET_TUN_DnsFlags flags
Flags.
struct GNUNET_DNSPARSER_Record * answers
Array of all answers in the packet, must contain "num_answers" entries.
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
uint16_t id
DNS ID (to match replies to requests).
void GNUNET_DNSPARSER_free_packet(struct GNUNET_DNSPARSER_Packet *p)
Free memory taken by a packet.
Definition: dnsparser.c:853
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_DNSPARSER_Record * additional_records
Array of all additional answers in the packet, must contain "num_additional_records" entries...
unsigned int num_answers
Number of answers in the packet, should be 0 for queries.
uint16_t id
Unique identifier for the request/response.
static struct GNUNET_OS_Process * p
Helper process we started.
Definition: gnunet-qr.c:59
unsigned int num_additional_records
Number of additional records in the packet, should be 0 for queries.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_new_array(n, type)
Allocate a size n array with structs or unions of the given type.
A DNS response record.
struct GNUNET_DNSPARSER_Record * authority_records
Array of all authority records in the packet, must contain "num_authority_records" entries...
struct GNUNET_DNSPARSER_Query * queries
Array of all queries in the packet, must contain "num_queries" entries.
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
uint16_t query_count
Number of queries.
unsigned int num_authority_records
Number of authoritative answers in the packet, should be 0 for queries.
uint16_t authority_rcount
Number of authoritative answers.
uint16_t answer_rcount
Number of answers.
Easy-to-process, parsed version of a DNS packet.
uint16_t additional_rcount
Number of additional records.
unsigned int num_queries
Number of queries in the packet.
struct GNUNET_TUN_DnsFlags flags
Bitfield of DNS flags.
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◆ 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 853 of file dnsparser.c.

References GNUNET_DNSPARSER_Packet::additional_records, GNUNET_DNSPARSER_Packet::answers, GNUNET_DNSPARSER_Packet::authority_records, GNUNET_DNSPARSER_free_record(), GNUNET_free, GNUNET_free_non_null, GNUNET_DNSPARSER_Query::name, GNUNET_DNSPARSER_Packet::num_additional_records, GNUNET_DNSPARSER_Packet::num_answers, GNUNET_DNSPARSER_Packet::num_authority_records, GNUNET_DNSPARSER_Packet::num_queries, and GNUNET_DNSPARSER_Packet::queries.

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().

854 {
855  for (unsigned int i = 0; i < p->num_queries; i++)
858  for (unsigned int i = 0; i < p->num_answers; i++)
861  for (unsigned int i = 0; i < p->num_authority_records; i++)
864  for (unsigned int i = 0; i < p->num_additional_records; i++)
867  GNUNET_free(p);
868 }
struct GNUNET_DNSPARSER_Record * answers
Array of all answers in the packet, must contain "num_answers" entries.
void GNUNET_DNSPARSER_free_record(struct GNUNET_DNSPARSER_Record *r)
Free the given DNS record.
Definition: dnsparser.c:169
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
struct GNUNET_DNSPARSER_Record * additional_records
Array of all additional answers in the packet, must contain "num_additional_records" entries...
unsigned int num_answers
Number of answers in the packet, should be 0 for queries.
unsigned int num_additional_records
Number of additional records in the packet, should be 0 for queries.
struct GNUNET_DNSPARSER_Record * authority_records
Array of all authority records in the packet, must contain "num_authority_records" entries...
struct GNUNET_DNSPARSER_Query * queries
Array of all queries in the packet, must contain "num_queries" entries.
unsigned int num_authority_records
Number of authoritative answers in the packet, should be 0 for queries.
char * name
Name of the record that the query is for (0-terminated).
unsigned int num_queries
Number of queries in the packet.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ 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 1256 of file dnsparser.c.

References add_record(), GNUNET_TUN_DnsHeader::additional_rcount, GNUNET_DNSPARSER_Packet::additional_records, GNUNET_TUN_DnsHeader::answer_rcount, GNUNET_DNSPARSER_Packet::answers, GNUNET_TUN_DnsHeader::authority_rcount, GNUNET_DNSPARSER_Packet::authority_records, GNUNET_TUN_DnsHeader::flags, GNUNET_DNSPARSER_Packet::flags, GNUNET_DNSPARSER_builder_add_query(), GNUNET_malloc, GNUNET_memcpy, GNUNET_NO, GNUNET_OK, GNUNET_SYSERR, GNUNET_YES, GNUNET_TUN_DnsHeader::id, GNUNET_DNSPARSER_Packet::id, GNUNET_TUN_DnsFlags::message_truncated, GNUNET_DNSPARSER_Packet::num_additional_records, GNUNET_DNSPARSER_Packet::num_answers, GNUNET_DNSPARSER_Packet::num_authority_records, GNUNET_DNSPARSER_Packet::num_queries, GNUNET_DNSPARSER_Packet::queries, 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().

1260 {
1261  struct GNUNET_TUN_DnsHeader dns;
1262  size_t off;
1263  char tmp[max];
1264  int ret;
1265  int trc;
1266 
1267  if ((p->num_queries > UINT16_MAX) || (p->num_answers > UINT16_MAX) ||
1268  (p->num_authority_records > UINT16_MAX) ||
1269  (p->num_additional_records > UINT16_MAX))
1270  return GNUNET_SYSERR;
1271  dns.id = p->id;
1272  dns.flags = p->flags;
1273  dns.query_count = htons(p->num_queries);
1274  dns.answer_rcount = htons(p->num_answers);
1275  dns.authority_rcount = htons(p->num_authority_records);
1276  dns.additional_rcount = htons(p->num_additional_records);
1277 
1278  off = sizeof(struct GNUNET_TUN_DnsHeader);
1279  trc = GNUNET_NO;
1280  for (unsigned int i = 0; i < p->num_queries; i++)
1281  {
1283  sizeof(tmp),
1284  &off,
1285  &p->queries[i]);
1286  if (GNUNET_SYSERR == ret)
1287  return GNUNET_SYSERR;
1288  if (GNUNET_NO == ret)
1289  {
1290  dns.query_count = htons((uint16_t)(i - 1));
1291  trc = GNUNET_YES;
1292  break;
1293  }
1294  }
1295  for (unsigned int i = 0; i < p->num_answers; i++)
1296  {
1297  ret = add_record(tmp, sizeof(tmp), &off, &p->answers[i]);
1298  if (GNUNET_SYSERR == ret)
1299  return GNUNET_SYSERR;
1300  if (GNUNET_NO == ret)
1301  {
1302  dns.answer_rcount = htons((uint16_t)(i - 1));
1303  trc = GNUNET_YES;
1304  break;
1305  }
1306  }
1307  for (unsigned int i = 0; i < p->num_authority_records; i++)
1308  {
1309  ret = add_record(tmp, sizeof(tmp), &off, &p->authority_records[i]);
1310  if (GNUNET_SYSERR == ret)
1311  return GNUNET_SYSERR;
1312  if (GNUNET_NO == ret)
1313  {
1314  dns.authority_rcount = htons((uint16_t)(i - 1));
1315  trc = GNUNET_YES;
1316  break;
1317  }
1318  }
1319  for (unsigned int i = 0; i < p->num_additional_records; i++)
1320  {
1321  ret = add_record(tmp, sizeof(tmp), &off, &p->additional_records[i]);
1322  if (GNUNET_SYSERR == ret)
1323  return GNUNET_SYSERR;
1324  if (GNUNET_NO == ret)
1325  {
1326  dns.additional_rcount = htons(i - 1);
1327  trc = GNUNET_YES;
1328  break;
1329  }
1330  }
1331 
1332  if (GNUNET_YES == trc)
1333  dns.flags.message_truncated = 1;
1334  GNUNET_memcpy(tmp, &dns, sizeof(struct GNUNET_TUN_DnsHeader));
1335 
1336  *buf = GNUNET_malloc(off);
1337  *buf_length = off;
1338  GNUNET_memcpy(*buf, tmp, off);
1339  if (GNUNET_YES == trc)
1340  return GNUNET_NO;
1341  return GNUNET_OK;
1342 }
struct GNUNET_DNSPARSER_Record * answers
Array of all answers in the packet, must contain "num_answers" entries.
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:1153
uint16_t id
DNS ID (to match replies to requests).
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
struct GNUNET_DNSPARSER_Record * additional_records
Array of all additional answers in the packet, must contain "num_additional_records" entries...
static int ret
Final status code.
Definition: gnunet-arm.c:89
unsigned int num_answers
Number of answers in the packet, should be 0 for queries.
unsigned int num_additional_records
Number of additional records in the packet, should be 0 for queries.
static char buf[2048]
struct GNUNET_DNSPARSER_Record * authority_records
Array of all authority records in the packet, must contain "num_authority_records" entries...
struct GNUNET_DNSPARSER_Query * queries
Array of all queries in the packet, must contain "num_queries" entries.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
unsigned int num_authority_records
Number of authoritative answers in the packet, should be 0 for queries.
unsigned int num_queries
Number of queries in the packet.
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:963
#define GNUNET_YES
Definition: gnunet_common.h:77
struct GNUNET_TUN_DnsFlags flags
Bitfield of DNS flags.
#define GNUNET_malloc(size)
Wrapper around malloc.
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◆ 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 888 of file dnsparser.c.

References _, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_memcpy, GNUNET_NO, GNUNET_OK, GNUNET_SYSERR, len, 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().

892 {
893  const char *dot;
894  const char *idna_name;
895  char *idna_start;
896  size_t start;
897  size_t pos;
898  size_t len;
899  Idna_rc rc;
900 
901  if (NULL == name)
902  return GNUNET_SYSERR;
903 
904  if (IDNA_SUCCESS !=
905  (rc = idna_to_ascii_8z(name, &idna_start, IDNA_ALLOW_UNASSIGNED)))
906  {
908  _(
909  "Failed to convert UTF-8 name `%s' to DNS IDNA format: %s\n"),
910  name,
911  idna_strerror(rc));
912  return GNUNET_NO;
913  }
914  idna_name = idna_start;
915  start = *off;
916  if (start + strlen(idna_name) + 2 > dst_len)
917  goto fail;
918  pos = start;
919  do
920  {
921  dot = strchr(idna_name, '.');
922  if (NULL == dot)
923  len = strlen(idna_name);
924  else
925  len = dot - idna_name;
926  if ((len >= 64) || (0 == len))
927  {
929  "Invalid DNS name `%s': label with %u characters encountered\n",
930  name,
931  (unsigned int)len);
932  goto fail; /* label too long or empty */
933  }
934  dst[pos++] = (char)(uint8_t)len;
935  GNUNET_memcpy(&dst[pos], idna_name, len);
936  pos += len;
937  idna_name += len + 1; /* also skip dot */
938  }
939  while (NULL != dot);
940  dst[pos++] = '\0'; /* terminator */
941  *off = pos;
942  free(idna_start);
943  return GNUNET_OK;
944 fail:
945  free(idna_start);
946  return GNUNET_NO;
947 }
static int start
Set if we are to start default services (including ARM).
Definition: gnunet-arm.c:39
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
const char * name
#define GNUNET_log(kind,...)
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
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◆ 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 963 of file dnsparser.c.

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().

967 {
968  int ret;
969  struct GNUNET_TUN_DnsQueryLine ql;
970 
972  dst_len -
973  sizeof(
974  struct GNUNET_TUN_DnsQueryLine),
975  off,
976  query->name);
977  if (ret != GNUNET_OK)
978  return ret;
979  ql.type = htons(query->type);
980  ql.dns_traffic_class = htons(query->dns_traffic_class);
981  GNUNET_memcpy(&dst[*off], &ql, sizeof(ql));
982  (*off) += sizeof(ql);
983  return GNUNET_OK;
984 }
uint16_t type
See GNUNET_DNSPARSER_TYPE_*.
DNS query prefix.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
static int ret
Final status code.
Definition: gnunet-arm.c:89
uint16_t dns_traffic_class
See GNUNET_TUN_DNS_CLASS_*.
char * name
Name of the record that the query is for (0-terminated).
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:888
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◆ 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 1000 of file dnsparser.c.

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().

1004 {
1005  uint16_t mxpref;
1006 
1007  if (*off + sizeof(uint16_t) > dst_len)
1008  return GNUNET_NO;
1009  mxpref = htons(mx->preference);
1010  GNUNET_memcpy(&dst[*off], &mxpref, sizeof(mxpref));
1011  (*off) += sizeof(mxpref);
1012  return GNUNET_DNSPARSER_builder_add_name(dst, dst_len, off, mx->mxhost);
1013 }
char * mxhost
Name of the mail server.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_NO
Definition: gnunet_common.h:78
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:888
uint16_t preference
Preference for this entry (lower value is higher preference).
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◆ 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 1076 of file dnsparser.c.

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().

1080 {
1081  struct GNUNET_TUN_DnsSoaRecord sd;
1082  int ret;
1083 
1084  if ((GNUNET_OK !=
1085  (ret =
1086  GNUNET_DNSPARSER_builder_add_name(dst, dst_len, off, soa->mname))) ||
1087  (GNUNET_OK !=
1088  (ret =
1089  GNUNET_DNSPARSER_builder_add_name(dst, dst_len, off, soa->rname))))
1090  return ret;
1091  if (*off + sizeof(struct GNUNET_TUN_DnsSoaRecord) > dst_len)
1092  return GNUNET_NO;
1093  sd.serial = htonl(soa->serial);
1094  sd.refresh = htonl(soa->refresh);
1095  sd.retry = htonl(soa->retry);
1096  sd.expire = htonl(soa->expire);
1097  sd.minimum = htonl(soa->minimum_ttl);
1098  GNUNET_memcpy(&dst[*off], &sd, sizeof(sd));
1099  (*off) += sizeof(sd);
1100  return GNUNET_OK;
1101 }
uint32_t retry
Time interval that should elapse before a failed refresh should be retried.
uint32_t refresh
Time interval before the zone should be refreshed.
char * mname
The domainname of the name server that was the original or primary source of data for this zone...
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
static int ret
Final status code.
Definition: gnunet-arm.c:89
uint32_t serial
The version number of the original copy of the zone.
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 ...
Payload of DNS SOA record (header).
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:888
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◆ 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 1029 of file dnsparser.c.

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().

1034 {
1035  struct GNUNET_TUN_DnsCertRecord dcert;
1036 
1037 #ifdef __clang__
1038 #pragma clang diagnostic push
1039 #pragma clang diagnostic ignored "-Wtautological-constant-out-of-range-compare"
1040 #endif
1041  if ((cert->cert_type > UINT16_MAX) || (cert->algorithm > UINT8_MAX))
1042  {
1043  GNUNET_break(0);
1044  return GNUNET_SYSERR;
1045  }
1046 #ifdef __clang__
1047 #pragma clang diagnostic pop
1048 #endif
1049  if (*off + sizeof(struct GNUNET_TUN_DnsCertRecord) + cert->certificate_size >
1050  dst_len)
1051  return GNUNET_NO;
1052  dcert.cert_type = htons((uint16_t)cert->cert_type);
1053  dcert.cert_tag = htons((uint16_t)cert->cert_tag);
1054  dcert.algorithm = (uint8_t)cert->algorithm;
1055  GNUNET_memcpy(&dst[*off], &dcert, sizeof(dcert));
1056  (*off) += sizeof(dcert);
1057  GNUNET_memcpy(&dst[*off], cert->certificate_data, cert->certificate_size);
1058  (*off) += cert->certificate_size;
1059  return GNUNET_OK;
1060 }
enum GNUNET_DNSPARSER_CertAlgorithm algorithm
Algorithm.
enum GNUNET_DNSPARSER_CertType cert_type
Certificate type.
uint16_t cert_tag
Certificate KeyTag.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
Payload of DNS CERT record.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
size_t certificate_size
Number of bytes in certificate_data.
char * certificate_data
Data of the certificate.
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◆ 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 1117 of file dnsparser.c.

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().

1121 {
1122  struct GNUNET_TUN_DnsSrvRecord sd;
1123  int ret;
1124 
1125  if (*off + sizeof(struct GNUNET_TUN_DnsSrvRecord) > dst_len)
1126  return GNUNET_NO;
1127  sd.prio = htons(srv->priority);
1128  sd.weight = htons(srv->weight);
1129  sd.port = htons(srv->port);
1130  GNUNET_memcpy(&dst[*off], &sd, sizeof(sd));
1131  (*off) += sizeof(sd);
1132  if (GNUNET_OK !=
1133  (ret =
1134  GNUNET_DNSPARSER_builder_add_name(dst, dst_len, off, srv->target)))
1135  return ret;
1136  return GNUNET_OK;
1137 }
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
static int ret
Final status code.
Definition: gnunet-arm.c:89
uint16_t port
TCP or UDP port of the service.
char * target
Hostname offering the service.
Payload of DNS SRV record (header).
uint16_t priority
Preference for this entry (lower value is higher preference).
uint16_t weight
Relative weight for records with the same priority.
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:888
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◆ 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.

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().

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:
637  r->data.raw.data = GNUNET_malloc(data_len);
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 }
uint16_t type
See GNUNET_DNSPARSER_TYPE_*.
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_DNSPARSER_TYPE_CNAME
struct GNUNET_DNSPARSER_SrvRecord * srv
SRV data for SRV records.
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:246
#define GNUNET_TIME_UNIT_SECONDS
One second.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
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_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_DNSPARSER_TYPE_MX
General DNS record prefix.
#define GNUNET_DNSPARSER_TYPE_PTR
#define GNUNET_DNSPARSER_TYPE_SOA
char * name
Name of the record that the query is for (0-terminated).
char * hostname
For NS, CNAME and PTR records, this is the uncompressed 0-terminated hostname.
struct GNUNET_DNSPARSER_SoaRecord * soa
SOA data for SOA records.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#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
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:440
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_SYSERR
Definition: gnunet_common.h:76
size_t data_len
Number of bytes in data.
void * data
Binary record data.
const char * name
struct GNUNET_TIME_Absolute expiration_time
When does the record expire?
uint16_t data_len
Number of bytes of data that follow.
struct GNUNET_DNSPARSER_MxRecord * mx
MX data for MX records.
#define GNUNET_DNSPARSER_TYPE_NS
uint16_t dns_traffic_class
See GNUNET_TUN_DNS_CLASS_*.
union GNUNET_DNSPARSER_Record::@27 data
Payload of the record (which one of these is valid depends on the &#39;type&#39;).
#define GNUNET_DNSPARSER_TYPE_SRV
struct GNUNET_DNSPARSER_RawRecord raw
Raw data for all other types.
#define GNUNET_malloc(size)
Wrapper around malloc.
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◆ 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.

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().

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
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◆ 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.

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

Referenced by GNUNET_DNSPARSER_parse().

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 }
uint16_t type
See GNUNET_DNSPARSER_TYPE_*.
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
DNS query prefix.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
uint16_t dns_traffic_class
See GNUNET_TUN_DNS_CLASS_*.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
const char * name
char * name
Name of the record that the query is for (0-terminated).
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◆ 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.

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().

394 {
395  struct GNUNET_DNSPARSER_SoaRecord *soa;
396  struct GNUNET_TUN_DnsSoaRecord soa_bin;
397  size_t old_off;
398 
399  old_off = *off;
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).
uint32_t retry
Time interval that should elapse before a failed refresh should be retried.
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
uint32_t refresh
Time interval before the zone should be refreshed.
char * mname
The domainname of the name server that was the original or primary source of data for this zone...
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
uint32_t serial
The version number of the original copy of the zone.
uint32_t minimum_ttl
The bit minimum TTL field that should be exported with any RR from this zone.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
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 ...
Payload of DNS SOA record (header).
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◆ 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.

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().

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);
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 }
enum GNUNET_DNSPARSER_CertAlgorithm algorithm
Algorithm.
enum GNUNET_DNSPARSER_CertType cert_type
Certificate type.
uint16_t cert_tag
Certificate KeyTag.
Information from CERT records (RFC 4034).
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
Payload of DNS CERT record.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
size_t certificate_size
Number of bytes in certificate_data.
char * certificate_data
Data of the certificate.
#define GNUNET_malloc(size)
Wrapper around malloc.
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◆ 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.

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().

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 }
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
char * mxhost
Name of the mail server.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
Information from MX records (RFC 1035).
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
uint16_t preference
Preference for this entry (lower value is higher preference).
void GNUNET_DNSPARSER_free_mx(struct GNUNET_DNSPARSER_MxRecord *mx)
Free MX information record.
Definition: dnsparser.c:154
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◆ 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.

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().

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);
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 }
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
void GNUNET_DNSPARSER_free_srv(struct GNUNET_DNSPARSER_SrvRecord *srv)
Free SRV information record.
Definition: dnsparser.c:139
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
uint16_t port
TCP or UDP port of the service.
char * target
Hostname offering the service.
Payload of DNS SRV record (header).
uint16_t priority
Preference for this entry (lower value is higher preference).
uint16_t weight
Relative weight for records with the same priority.
Information from SRV records (RFC 2782).
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◆ 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.

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().

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: {
773  }
774  }
775  return dup;
776 }
uint16_t type
See GNUNET_DNSPARSER_TYPE_*.
#define GNUNET_DNSPARSER_TYPE_CNAME
struct GNUNET_DNSPARSER_SrvRecord * srv
SRV data for SRV records.
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:786
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:804
#define GNUNET_memdup(buf, size)
Allocate and initialize a block of memory.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define GNUNET_DNSPARSER_TYPE_MX
#define GNUNET_DNSPARSER_TYPE_PTR
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:837
#define GNUNET_DNSPARSER_TYPE_SOA
char * name
Name of the record that the query is for (0-terminated).
char * hostname
For NS, CNAME and PTR records, this is the uncompressed 0-terminated hostname.
struct GNUNET_DNSPARSER_SoaRecord * soa
SOA data for SOA records.
A DNS response record.
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:821
size_t data_len
Number of bytes in data.
void * data
Binary record data.
struct GNUNET_DNSPARSER_MxRecord * mx
MX data for MX records.
#define GNUNET_DNSPARSER_TYPE_NS
union GNUNET_DNSPARSER_Record::@27 data
Payload of the record (which one of these is valid depends on the &#39;type&#39;).
#define GNUNET_DNSPARSER_TYPE_SRV
struct GNUNET_DNSPARSER_RawRecord raw
Raw data for all other types.
#define GNUNET_DNSPARSER_TYPE_CERT
struct GNUNET_DNSPARSER_CertRecord * cert
CERT data for CERT records.
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◆ 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 786 of file dnsparser.c.

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

Referenced by GNUNET_DNSPARSER_duplicate_record().

788 {
789  struct GNUNET_DNSPARSER_SoaRecord *dup = GNUNET_memdup(r, sizeof(*r));
790 
791  dup->mname = GNUNET_strdup(r->mname);
792  dup->rname = GNUNET_strdup(r->rname);
793  return dup;
794 }
Information from SOA records (RFC 1035).
char * mname
The domainname of the name server that was the original or primary source of data for this zone...
#define GNUNET_memdup(buf, size)
Allocate and initialize a block of memory.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
char * rname
A domainname which specifies the mailbox of the person responsible for this zone. ...
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◆ 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 804 of file dnsparser.c.

References GNUNET_DNSPARSER_CertRecord::certificate_data, GNUNET_memdup, and GNUNET_strdup.

Referenced by GNUNET_DNSPARSER_duplicate_record().

806 {
807  struct GNUNET_DNSPARSER_CertRecord *dup = GNUNET_memdup(r, sizeof(*r));
808 
810  return dup;
811 }
Information from CERT records (RFC 4034).
#define GNUNET_memdup(buf, size)
Allocate and initialize a block of memory.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
char * certificate_data
Data of the certificate.
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◆ 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 821 of file dnsparser.c.

References GNUNET_memdup, GNUNET_strdup, and GNUNET_DNSPARSER_MxRecord::mxhost.

Referenced by GNUNET_DNSPARSER_duplicate_record().

822 {
823  struct GNUNET_DNSPARSER_MxRecord *dup = GNUNET_memdup(r, sizeof(*r));
824 
825  dup->mxhost = GNUNET_strdup(r->mxhost);
826  return dup;
827 }
char * mxhost
Name of the mail server.
#define GNUNET_memdup(buf, size)
Allocate and initialize a block of memory.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
Information from MX records (RFC 1035).
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◆ 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 837 of file dnsparser.c.

References GNUNET_memdup, GNUNET_strdup, and GNUNET_DNSPARSER_SrvRecord::target.

Referenced by GNUNET_DNSPARSER_duplicate_record().

839 {
840  struct GNUNET_DNSPARSER_SrvRecord *dup = GNUNET_memdup(r, sizeof(*r));
841 
842  dup->target = GNUNET_strdup(r->target);
843  return dup;
844 }
#define GNUNET_memdup(buf, size)
Allocate and initialize a block of memory.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
char * target
Hostname offering the service.
Information from SRV records (RFC 2782).
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◆ 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.

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_non_null, 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().

170 {
172  switch (r->type)
173  {
176  break;
177 
180  break;
181 
184  break;
185 
188  break;
189 
194  break;
195 
196  default:
198  break;
199  }
200 }
void GNUNET_DNSPARSER_free_soa(struct GNUNET_DNSPARSER_SoaRecord *soa)
Free SOA information record.
Definition: dnsparser.c:108
uint16_t type
See GNUNET_DNSPARSER_TYPE_*.
void GNUNET_DNSPARSER_free_srv(struct GNUNET_DNSPARSER_SrvRecord *srv)
Free SRV information record.
Definition: dnsparser.c:139
#define GNUNET_DNSPARSER_TYPE_CNAME
struct GNUNET_DNSPARSER_SrvRecord * srv
SRV data for SRV records.
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
#define GNUNET_DNSPARSER_TYPE_MX
#define GNUNET_DNSPARSER_TYPE_PTR
#define GNUNET_DNSPARSER_TYPE_SOA
char * name
Name of the record that the query is for (0-terminated).
char * hostname
For NS, CNAME and PTR records, this is the uncompressed 0-terminated hostname.
struct GNUNET_DNSPARSER_SoaRecord * soa
SOA data for SOA records.
void * data
Binary record data.
struct GNUNET_DNSPARSER_MxRecord * mx
MX data for MX records.
#define GNUNET_DNSPARSER_TYPE_NS
void GNUNET_DNSPARSER_free_cert(struct GNUNET_DNSPARSER_CertRecord *cert)
Free CERT information record.
Definition: dnsparser.c:124
union GNUNET_DNSPARSER_Record::@27 data
Payload of the record (which one of these is valid depends on the &#39;type&#39;).
#define GNUNET_DNSPARSER_TYPE_SRV
struct GNUNET_DNSPARSER_RawRecord raw
Raw data for all other types.
void GNUNET_DNSPARSER_free_mx(struct GNUNET_DNSPARSER_MxRecord *mx)
Free MX information record.
Definition: dnsparser.c:154
#define GNUNET_DNSPARSER_TYPE_CERT
struct GNUNET_DNSPARSER_CertRecord * cert
CERT data for CERT records.
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◆ 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.

References GNUNET_free, GNUNET_free_non_null, and GNUNET_DNSPARSER_MxRecord::mxhost.

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

155 {
156  if (NULL == mx)
157  return;
159  GNUNET_free(mx);
160 }
char * mxhost
Name of the mail server.
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ 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.

References GNUNET_free, GNUNET_free_non_null, and GNUNET_DNSPARSER_SrvRecord::target.

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

140 {
141  if (NULL == srv)
142  return;
144  GNUNET_free(srv);
145 }
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
char * target
Hostname offering the service.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ 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.

References GNUNET_free, GNUNET_free_non_null, 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().

109 {
110  if (NULL == soa)
111  return;
114  GNUNET_free(soa);
115 }
char * mname
The domainname of the name server that was the original or primary source of data for this zone...
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
char * rname
A domainname which specifies the mailbox of the person responsible for this zone. ...
#define GNUNET_free(ptr)
Wrapper around free.
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◆ 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.

References GNUNET_DNSPARSER_CertRecord::certificate_data, GNUNET_free, and GNUNET_free_non_null.

Referenced by dns_value_to_string(), and GNUNET_DNSPARSER_free_record().

125 {
126  if (NULL == cert)
127  return;
129  GNUNET_free(cert);
130 }
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
char * certificate_data
Data of the certificate.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ 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 1353 of file dnsparser.c.

References data, data_size, GNUNET_malloc, and ret.

Referenced by dns_value_to_string().

1354 {
1355  char *ret;
1356  size_t off;
1357  const uint8_t *idata;
1358 
1359  idata = data;
1360  ret = GNUNET_malloc(data_size * 2 + 1);
1361  for (off = 0; off < data_size; off++)
1362  sprintf(&ret[off * 2], "%02x", idata[off]);
1363  return ret;
1364 }
static int ret
Final status code.
Definition: gnunet-arm.c:89
uint32_t data
The data value.
static size_t data_size
Number of bytes in data.
#define GNUNET_malloc(size)
Wrapper around malloc.
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◆ 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 1376 of file dnsparser.c.

References data, data_size, and h.

Referenced by dns_string_to_value().

1377 {
1378  size_t data_size;
1379  size_t off;
1380  uint8_t *idata;
1381  unsigned int h;
1382  char in[3];
1383 
1384  data_size = strlen(hex) / 2;
1385  idata = data;
1386  in[2] = '\0';
1387  for (off = 0; off < data_size; off++)
1388  {
1389  in[0] = tolower((unsigned char)hex[off * 2]);
1390  in[1] = tolower((unsigned char)hex[off * 2 + 1]);
1391  if (1 != sscanf(in, "%x", &h))
1392  return off;
1393  idata[off] = (uint8_t)h;
1394  }
1395  return off;
1396 }
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:94
uint32_t data
The data value.
static size_t data_size
Number of bytes in data.
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