base.c File Reference

Functions to send/receive dns packets. More...

#include "dns.h"
#include "attrs.h"

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Data Structures
struct	dns_option_t

Macros
#define	DECODE_FAIL(_reason)   if (reason) *reason = FR_DNS_DECODE_FAIL_ ## _reason

Functions
static bool	attr_valid (UNUSED fr_dict_t *dict, UNUSED fr_dict_attr_t const *parent, UNUSED char const *name, UNUSED int attr, fr_type_t type, fr_dict_attr_flags_t *flags)
void	fr_dns_global_free (void)
int	fr_dns_global_init (void)
	Resolve/cache attributes in the DNS dictionary. More...
fr_dns_labels_t *	fr_dns_labels_get (uint8_t const *packet, size_t packet_len, bool init_mark)
bool	fr_dns_packet_ok (uint8_t const *packet, size_t packet_len, bool query, fr_dns_decode_fail_t *reason)
static bool	fr_dns_tlv_ok (uint8_t const *p, uint8_t const *end, fr_dns_decode_fail_t *reason)

Variables
fr_dict_attr_t const *	attr_dns_ar
fr_dict_attr_t const *	attr_dns_ns
fr_dict_attr_t const *	attr_dns_packet
fr_dict_attr_t const *	attr_dns_question
fr_dict_attr_t const *	attr_dns_rr
fr_dict_t const *	dict_dns
fr_dict_autoload_t	dns_dict []
fr_dict_attr_autoload_t	dns_dict_attr []
static _Thread_local fr_dns_block_t	fr_dns_blocks [256]
static _Thread_local fr_dns_labels_t	fr_dns_labels
static _Thread_local uint8_t	fr_dns_marker [65536]
char const *	fr_dns_packet_names [FR_DNS_CODE_MAX]
static uint32_t	instance_count = 0
fr_dict_protocol_t	libfreeradius_dns_dict_protocol
static fr_table_num_ordered_t const	subtype_table []

Detailed Description

Functions to send/receive dns packets.

Id

567634561b4b0574a3debb0b718d84ca6f943e07

Copyright

2008 The FreeRADIUS server project

2021 Network RADIUS SAS (legal.nosp@m.@net.nosp@m.workr.nosp@m.adiu.nosp@m.s.com)

Definition in file base.c.

---

Data Structure Documentation

dns_option_t

struct dns_option_t

Definition at line 33 of file base.c.

Data Fields
uint16_t	code
uint16_t	length

Macro Definition Documentation

DECODE_FAIL

#define DECODE_FAIL

(

_reason

)

if (reason) *reason = FR_DNS_DECODE_FAIL_ ## _reason

Definition at line 76 of file base.c.

Function Documentation

attr_valid()

static bool attr_valid ( UNUSED fr_dict_t *  dict, UNUSED fr_dict_attr_t const *  parent, UNUSED char const *  name, UNUSED int  attr, fr_type_t  type, fr_dict_attr_flags_t *  flags  )

static

Definition at line 441 of file base.c.

fr_dns_global_free()

void fr_dns_global_free

(

void

)

Definition at line 426 of file base.c.

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fr_dns_global_init()

int fr_dns_global_init

(

void

)

Resolve/cache attributes in the DNS dictionary.

Returns

• 0 on success.
• -1 on failure.

Definition at line 404 of file base.c.

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fr_dns_labels_get()

fr_dns_labels_t* fr_dns_labels_get	(	uint8_t const *	packet,
		size_t	packet_len,
		bool	init_mark
	)

Definition at line 375 of file base.c.

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fr_dns_packet_ok()

bool fr_dns_packet_ok	(	uint8_t const *	packet,
		size_t	packet_len,
		bool	query,
		fr_dns_decode_fail_t *	reason
	)

Definition at line 100 of file base.c.

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fr_dns_tlv_ok()

static bool fr_dns_tlv_ok ( uint8_t const *  p, uint8_t const *  end, fr_dns_decode_fail_t *  reason  )

static

Definition at line 78 of file base.c.

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Variable Documentation

attr_dns_ar

fr_dict_attr_t const* attr_dns_ar

Definition at line 55 of file base.c.

attr_dns_ns

fr_dict_attr_t const* attr_dns_ns

Definition at line 54 of file base.c.

attr_dns_packet

fr_dict_attr_t const* attr_dns_packet

Definition at line 51 of file base.c.

attr_dns_question

fr_dict_attr_t const* attr_dns_question

Definition at line 52 of file base.c.

attr_dns_rr

fr_dict_attr_t const* attr_dns_rr

Definition at line 53 of file base.c.

dict_dns

fr_dict_t const* dict_dns

Definition at line 38 of file base.c.

dns_dict

fr_dict_autoload_t dns_dict

Initial value:

= {
        { .out = &dict_dns, .proto = "dns" },
        { NULL }
}

Definition at line 45 of file base.c.

dns_dict_attr

fr_dict_attr_autoload_t dns_dict_attr

Initial value:

= {
 
        { .out = &attr_dns_packet, .name = "Header", .type = FR_TYPE_STRUCT, .dict = &dict_dns },
        { .out = &attr_dns_question, .name = "Question", .type = FR_TYPE_STRUCT, .dict = &dict_dns },
        { .out = &attr_dns_rr, .name = "Resource-Record", .type = FR_TYPE_STRUCT, .dict = &dict_dns },
        { .out = &attr_dns_ns, .name = "Name-Server", .type = FR_TYPE_STRUCT, .dict = &dict_dns },
        { .out = &attr_dns_ar, .name = "Additional-Record", .type = FR_TYPE_STRUCT, .dict = &dict_dns },
        { NULL }
}

Definition at line 58 of file base.c.

fr_dns_blocks

_Thread_local fr_dns_block_t fr_dns_blocks[256]

static

Definition at line 41 of file base.c.

fr_dns_labels

_Thread_local fr_dns_labels_t fr_dns_labels

static

Definition at line 40 of file base.c.

fr_dns_marker

_Thread_local uint8_t fr_dns_marker[65536]

static

Definition at line 42 of file base.c.

fr_dns_packet_names

char const* fr_dns_packet_names[FR_DNS_CODE_MAX]

Initial value:

= {
        [FR_DNS_QUERY] = "Query",
        [FR_DNS_INVERSE_QUERY] = "Inverse-Query",
        [FR_DNS_STATUS] = "Status",
        [FR_DNS_UPDATE] = "Update",
        [FR_DNS_STATEFUL_OPERATION] = "Stateful-Operation",
}

Definition at line 68 of file base.c.

instance_count

uint32_t instance_count = 0

static

Definition at line 31 of file base.c.

libfreeradius_dns_dict_protocol

fr_dict_protocol_t libfreeradius_dns_dict_protocol

Initial value:

= {
        .name = "dns",
        .default_type_size = 2,
        .default_type_length = 2,
        .subtype_table = subtype_table,
        .subtype_table_len = NUM_ELEMENTS(subtype_table),
        .attr_valid = attr_valid,
 
        .init = fr_dns_global_init,
        .free = fr_dns_global_free,
}

Definition at line 469 of file base.c.

subtype_table

fr_table_num_ordered_t const subtype_table[]

static

Initial value:

= {
        { L("dns_label"),                       FLAG_ENCODE_DNS_LABEL },
        { L("uncompressed"),                    FLAG_ENCODE_DNS_LABEL_UNCOMPRESSED },
}

Definition at line 435 of file base.c.