rlm_unbound.c File Reference

DNS services via libunbound. More...

#include <freeradius-devel/server/base.h>
#include <freeradius-devel/server/module_rlm.h>
#include <freeradius-devel/server/log.h>
#include <freeradius-devel/unlang/xlat_func.h>
#include <fcntl.h>
#include "io.h"
#include "log.h"

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Data Structures
struct	rlm_unbound_t
struct	rlm_unbound_thread_t
struct	unbound_request_t

Macros
#define	LOG_PREFIX   mctx->inst->name
#define	RCODEERROR(_code, _message)
#define	UB_QUERY(_record, _rrvalue, _return, _hasprio)

Functions
static int	_unbound_request_free (unbound_request_t *ur)
static int	mod_bootstrap (module_inst_ctx_t const *mctx)
static int	mod_thread_detach (module_thread_inst_ctx_t const *mctx)
static int	mod_thread_instantiate (module_thread_inst_ctx_t const *mctx)
static xlat_action_t	xlat_unbound (TALLOC_CTX *ctx, fr_dcursor_t *out, xlat_ctx_t const *xctx, request_t *request, fr_value_box_list_t *in)
	Perform a DNS lookup using libunbound. More...
static void	xlat_unbound_callback (void *mydata, int rcode, void *packet, int packet_len, int sec, char *why_bogus)
	Callback called by unbound when resolution started with ub_resolve_event() completes. More...
static xlat_action_t	xlat_unbound_resume (UNUSED TALLOC_CTX *ctx, fr_dcursor_t *out, xlat_ctx_t const *xctx, request_t *request, UNUSED fr_value_box_list_t *in)
static void	xlat_unbound_signal (xlat_ctx_t const *xctx, request_t *request, UNUSED fr_signal_t action)
static void	xlat_unbound_timeout (UNUSED fr_event_list_t *el, UNUSED fr_time_t now, void *uctx)
	Callback from our timeout event to cancel a request. More...

Variables
static const conf_parser_t	module_config []
module_rlm_t	rlm_unbound
static xlat_arg_parser_t const	xlat_unbound_args []

Detailed Description

DNS services via libunbound.

Id

f6c77c5aa89000222baa052187c1df2ae2bd620b

Copyright

2013 The FreeRADIUS server project

2013 Brian S. Julin (bjuli.nosp@m.n@cl.nosp@m.arku..nosp@m.edu)

Definition in file rlm_unbound.c.

---

Data Structure Documentation

rlm_unbound_t

struct rlm_unbound_t

Definition at line 38 of file rlm_unbound.c.

Data Fields
char const *	filename	Unbound configuration file.
char const *	hosts	hosts file to load
char const *	name
char const *	resolvconf	resolv.conf file to use
uint32_t	timeout

rlm_unbound_thread_t

struct rlm_unbound_thread_t

Definition at line 47 of file rlm_unbound.c.

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Data Fields
unbound_io_event_base_t *	ev_b	Unbound event base.
rlm_unbound_t *	inst	Instance data.
unbound_log_t *	u_log	Unbound log structure.

unbound_request_t

struct unbound_request_t

Definition at line 53 of file rlm_unbound.c.

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Data Fields
int	async_id	Id of async query.
uint16_t	count	Number of results to return.
int	done	Indicator that the callback has been called Negative values indicate errors.
fr_event_timer_t const *	ev	Event for timeout.
bool	has_priority	Does the returned data start with a priority field.
fr_value_box_list_t	list	Where to put the parsed results.
TALLOC_CTX *	out_ctx	CTX to allocate parsed results in.
request_t *	request	Current request being processed.
fr_type_t	return_type	Data type to parse results into.
rlm_unbound_thread_t *	t	Thread running this request.
bool	timedout	Request timedout.

Macro Definition Documentation

LOG_PREFIX

#define LOG_PREFIX   mctx->inst->name

Definition at line 27 of file rlm_unbound.c.

RCODEERROR

#define RCODEERROR	(		_code,
			_message
	)

Value:

        case _code: \
        REDEBUG(_message, ur->t->inst->name); \
        goto error

UB_QUERY

#define UB_QUERY	(		_record,
			_rrvalue,
			_return,
			_hasprio
	)

Value:

        if (strcmp(query_vb->vb_strvalue, _record) == 0) { \
                ur->return_type = _return; \
                ur->has_priority = _hasprio; \
                ub_resolve_event(t->ev_b->ub, host_vb->vb_strvalue, _rrvalue, 1, ur, \
                                xlat_unbound_callback, &ur->async_id); \
        }

Function Documentation

_unbound_request_free()

static int _unbound_request_free ( unbound_request_t *  ur )

static

Definition at line 79 of file rlm_unbound.c.

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mod_bootstrap()

static int mod_bootstrap ( module_inst_ctx_t const *  mctx )

static

Definition at line 487 of file rlm_unbound.c.

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mod_thread_detach()

static int mod_thread_detach ( module_thread_inst_ctx_t const *  mctx )

static

Definition at line 477 of file rlm_unbound.c.

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mod_thread_instantiate()

static int mod_thread_instantiate ( module_thread_inst_ctx_t const *  mctx )

static

Definition at line 422 of file rlm_unbound.c.

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xlat_unbound_callback()

static void xlat_unbound_callback ( void *  mydata, int  rcode, void *  packet, int  packet_len, int  sec, char *  why_bogus  )

static

Callback called by unbound when resolution started with ub_resolve_event() completes.

Parameters

mydata	the request tracking structure set up before ub_resolve_event() was called
rcode	should be the rcode from the reply packet, but appears not to be
packet	wire format reply packet
packet_len	length of wire format packet
sec	DNSSEC status code
why_bogus	String describing DNSSEC issue if sec = 1
rate_limited	Was the request rate limited due to unbound workload

Definition at line 99 of file rlm_unbound.c.

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xlat_unbound_resume()

static xlat_action_t xlat_unbound_resume ( UNUSED TALLOC_CTX *  ctx, fr_dcursor_t *  out, xlat_ctx_t const *  xctx, request_t *  request, UNUSED fr_value_box_list_t *  in  )

static

Definition at line 287 of file rlm_unbound.c.

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xlat_unbound_signal()

static void xlat_unbound_signal ( xlat_ctx_t const *  xctx, request_t *  request, UNUSED fr_signal_t  action  )

static

Definition at line 274 of file rlm_unbound.c.

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xlat_unbound_timeout()

static void xlat_unbound_timeout ( UNUSED fr_event_list_t *  el, UNUSED fr_time_t  now, void *  uctx  )

static

Callback from our timeout event to cancel a request.

Definition at line 260 of file rlm_unbound.c.

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Variable Documentation

module_config

const conf_parser_t module_config[]

static

Initial value:

= {
        { FR_CONF_OFFSET_FLAGS("filename", CONF_FLAG_FILE_INPUT, rlm_unbound_t, filename), .dflt = "${modconfdir}/unbound/default.conf" },
        { FR_CONF_OFFSET("timeout", rlm_unbound_t, timeout), .dflt = "3000" },
        { FR_CONF_OFFSET_FLAGS("resolvconf", CONF_FLAG_FILE_INPUT, rlm_unbound_t, resolvconf) },
        { FR_CONF_OFFSET_FLAGS("hosts", CONF_FLAG_FILE_INPUT, rlm_unbound_t, hosts) },
        CONF_PARSER_TERMINATOR
}

Definition at line 71 of file rlm_unbound.c.

rlm_unbound

module_rlm_t rlm_unbound

Initial value:

= {
        .common = {
                .magic                  = MODULE_MAGIC_INIT,
                .name                   = "unbound",
                .flags                  = MODULE_TYPE_THREAD_SAFE,
                .inst_size              = sizeof(rlm_unbound_t),
                .config                 = module_config,
                .bootstrap              = mod_bootstrap,
 
                .thread_inst_size       = sizeof(rlm_unbound_thread_t),
                .thread_inst_type       = "rlm_unbound_thread_t",
                .thread_instantiate     = mod_thread_instantiate,
                .thread_detach          = mod_thread_detach
        }
}

Definition at line 506 of file rlm_unbound.c.

xlat_unbound_args

xlat_arg_parser_t const xlat_unbound_args[]

static

Initial value:

= {
        { .required = true, .concat = true, .type = FR_TYPE_STRING },
        { .required = true, .concat = true, .type = FR_TYPE_STRING },
        { .single = true, .type = FR_TYPE_UINT16 },
        XLAT_ARG_PARSER_TERMINATOR
}

Definition at line 336 of file rlm_unbound.c.