fr_pair_t template functions More...

#include <freeradius-devel/server/exec.h>
#include <freeradius-devel/server/exec_legacy.h>
#include <freeradius-devel/server/tmpl.h>
#include <freeradius-devel/server/tmpl_dcursor.h>
#include <freeradius-devel/server/client.h>
#include <freeradius-devel/unlang/call.h>
#include <freeradius-devel/util/atexit.h>
#include <freeradius-devel/util/dlist.h>
#include <freeradius-devel/util/proto.h>
#include <freeradius-devel/util/value.h>
#include <freeradius-devel/util/edit.h>
#include <freeradius-devel/util/token.h>
#include <freeradius-devel/util/types.h>
#include <talloc.h>

Include dependency graph for tmpl_eval.c:

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Macros
#define	_TMPL_PRIVATE 1

Functions
static int	_tmpl_global_free (UNUSED void *uctx)

static int	_tmpl_global_init (UNUSED void *uctx)

ssize_t	_tmpl_to_atype (TALLOC_CTX ctx, void out, request_t request, tmpl_t const vpt, xlat_escape_legacy_t escape, void const *escape_ctx, fr_type_t dst_type)
	Expand a template to a string, allocing a new buffer to hold the string.

ssize_t	_tmpl_to_type (void out, uint8_t buff, size_t bufflen, request_t request, tmpl_t const vpt, xlat_escape_legacy_t escape, void const *escape_ctx, fr_type_t dst_type)
	Expand a tmpl_t to a string writing the result to a buffer.

	if (!vpt->rules.escape.func &&vpt->rules.escape.safe_for)

	if ((!did_concat &&tmpl_escape_pre_concat(vpt))\|\|tmpl_escape_post_concat(vpt))

int	pair_append_by_tmpl_parent (TALLOC_CTX ctx, fr_pair_t out, fr_pair_list_t list, tmpl_t const *vpt, bool skip_list)
	Allocate and insert a leaf vp from a tmpl_t, building the parent vps if needed.

int	tmpl_copy_pair_children (TALLOC_CTX ctx, fr_pair_list_t out, request_t request, tmpl_t const vpt)
	Copy children of pairs matching a tmpl_t in the current request_t.

int	tmpl_copy_pairs (TALLOC_CTX ctx, fr_pair_list_t out, request_t request, tmpl_t const vpt)
	Copy pairs matching a tmpl_t in the current request_t.

int	tmpl_eval (TALLOC_CTX ctx, fr_value_box_list_t out, request_t request, tmpl_t const vpt)
	Gets the value of a tmpl.

int	tmpl_eval_cast_in_place (fr_value_box_list_t list, request_t request, tmpl_t const *vpt)
	Casts a value or list of values according to the tmpl.

static void *	tmpl_eval_escape_uctx_alloc (request_t request, tmpl_escape_t const escape)
	Allocate a uctx for an escaping function.

static void	tmpl_eval_escape_uctx_free (tmpl_escape_t const escape, void uctx)
	Free a uctx for an escaping function.

int	tmpl_eval_pair (TALLOC_CTX ctx, fr_value_box_list_t out, request_t request, tmpl_t const vpt)
	Gets the value of a real or virtual attribute.

fr_type_t	tmpl_expanded_type (tmpl_t const *vpt)
	Return the native data type of the expression.

int	tmpl_find_or_add_vp (fr_pair_t *out, request_t request, tmpl_t const *vpt)
	Returns the first VP matching a tmpl_t, or if no VPs match, creates a new one.

int	tmpl_find_vp (fr_pair_t *out, request_t request, tmpl_t const *vpt)
	Returns the first VP matching a tmpl_t.

int	tmpl_global_init (void)

TALLOC_CTX *	tmpl_list_ctx (request_t request, fr_dict_attr_t const list)
	Return the correct TALLOC_CTX to alloc fr_pair_t in, for a list.

fr_pair_list_t *	tmpl_list_head (request_t request, fr_dict_attr_t const list)
	Resolve attribute fr_pair_list_t value to an attribute list.

fr_packet_t *	tmpl_packet_ptr (request_t request, fr_dict_attr_t const list)
	Resolve a list to the fr_packet_t holding the HEAD pointer for a fr_pair_t list.

int	tmpl_request_ptr (request_t *context, FR_DLIST_HEAD(tmpl_request_list) const rql)
	Resolve a tmpl_request_ref_t to a request_t.

int	tmpl_value_list_insert_tail (fr_value_box_list_t list, fr_value_box_t box, tmpl_t const *vpt)
	Insert a value-box to a list, with casting.

	VALUE_BOX_LIST_VERIFY (list)

Variables
static fr_dict_t const *	dict_freeradius

static fr_dict_t const *	dict_radius

goto	success

fr_dict_attr_t const *	tmpl_attr_unspec
	Placeholder attribute for uses of unspecified attribute references.

fr_dict_autoload_t	tmpl_dict []

Detailed Description

fr_pair_t template functions

Id: 0234f583648b9044aa8c75662b8cf77e91e7203b

Copyright: 2014-2020 The FreeRADIUS server project

Definition in file tmpl_eval.c.

Macro Definition Documentation

◆ _TMPL_PRIVATE

#define _TMPL_PRIVATE 1

Definition at line 29 of file tmpl_eval.c.

Function Documentation

◆ _tmpl_global_free()

static int _tmpl_global_free ( UNUSED void * uctx )

static

Definition at line 1458 of file tmpl_eval.c.

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◆ _tmpl_global_init()

static int _tmpl_global_init ( UNUSED void * uctx )

static

Definition at line 1467 of file tmpl_eval.c.

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◆ _tmpl_to_atype()

ssize_t _tmpl_to_atype	(	TALLOC_CTX *	ctx,
		void *	out,
		request_t *	request,
		tmpl_t const *	vpt,
		xlat_escape_legacy_t	escape,
		void const *	escape_ctx,
		fr_type_t	dst_type
	)

Expand a template to a string, allocing a new buffer to hold the string.

The intended use of tmpl_expand and tmpl_aexpand is for modules to easily convert a tmpl_t provided by the conf parser, into a usable value. The value returned should be raw and undoctored for FR_TYPE_STRING and FR_TYPE_OCTETS types, and the printable (string) version of the data for all others.

This function will always duplicate values, whereas tmpl_expand may return a pointer to an existing buffer.

Note: This function is used where raw string values are needed, which may mean the string returned may be binary data or contain unprintable chars. fr_snprint or fr_asprint should be used before using these values in debug statements. is_printable can be used to check if the string only contains printable chars.; The type (char or uint8_t) can be obtained with talloc_get_type, and may be used as a hint as to how to process or print the data.

Parameters

ctx	to allocate new buffer in.
out	Where to write pointer to the new buffer.
request	Current request.
vpt	to expand. Must be one of the following types: TMPL_TYPE_DATA_UNRESOLVED TMPL_TYPE_EXEC TMPL_TYPE_XLAT TMPL_TYPE_ATTR TMPL_TYPE_DATA
escape	xlat escape function (only used for TMPL_TYPE_XLAT_UNRESOLVED_* types).
escape_ctx	xlat escape function data (only used for TMPL_TYPE_XLAT_UNRESOLVED_* types).
dst_type	FR_TYPE_* matching out pointer.

See also: tmpl_aexpand.

Returns

-1 on failure.
The length of data written to buff, or pointed to by out.

Definition at line 563 of file tmpl_eval.c.

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◆ _tmpl_to_type()

ssize_t _tmpl_to_type	(	void *	out,
		uint8_t *	buff,
		size_t	bufflen,
		request_t *	request,
		tmpl_t const *	vpt,
		xlat_escape_legacy_t	escape,
		void const *	escape_ctx,
		fr_type_t	dst_type
	)

Expand a tmpl_t to a string writing the result to a buffer.

The intended use of tmpl_expand and tmpl_aexpand is for modules to easily convert a tmpl_t provided by the conf parser, into a usable value. The value returned should be raw and undoctored for FR_TYPE_STRING and FR_TYPE_OCTETS types, and the printable (string) version of the data for all others.

Depending what arguments are passed, either copies the value to buff, or writes a pointer to a string buffer to out. This allows the most efficient access to the value resolved by the tmpl_t, avoiding unnecessary string copies.

Note: This function is used where raw string values are needed, which may mean the string returned may be binary data or contain unprintable chars. fr_snprint or fr_asprint should be used before using these values in debug statements. is_printable can be used to check if the string only contains printable chars.

Parameters

[out]	out	Where to write a pointer to the string buffer. On return may point to buff if buff was used to store the value. Otherwise will point to a fr_value_box_t buffer, or the name of the template. Must not be NULL.
[out]	buff	Expansion buffer, may be NULL except for the following types: TMPL_TYPE_EXEC TMPL_TYPE_XLAT
[in]	bufflen	Length of expansion buffer. Must be >= 2.
[in]	request	Current request.
[in]	vpt	to expand. Must be one of the following types: TMPL_TYPE_DATA_UNRESOLVED TMPL_TYPE_EXEC TMPL_TYPE_XLAT TMPL_TYPE_ATTR TMPL_TYPE_DATA
[in]	escape	xlat escape function (only used for xlat types).
[in]	escape_ctx	xlat escape function data.
	dst_type	FR_TYPE_* matching out pointer.

See also: tmpl_expand.

Returns

-1 on failure.
The length of data written out.

Definition at line 284 of file tmpl_eval.c.

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◆ if() [1/2]

if ( !vpt->rules.escape.func &&vpt->rules.escape. safe_for )

Definition at line 1449 of file tmpl_eval.c.

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◆ if() [2/2]

if ( (!did_concat &&tmpl_escape_pre_concat(vpt))||tmpl_escape_post_concat(vpt) )

Definition at line 1433 of file tmpl_eval.c.

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◆ pair_append_by_tmpl_parent()

int pair_append_by_tmpl_parent	(	TALLOC_CTX *	ctx,
		fr_pair_t **	out,
		fr_pair_list_t *	list,
		tmpl_t const *	vpt,
		bool	skip_list
	)

Allocate and insert a leaf vp from a tmpl_t, building the parent vps if needed.

This is the simple case - just add a vp at the first place where the parents exist, or create the parents, with no attempt to handle filters.

It is functionally equivalent to fr_pair_append_by_da_parent() but uses a tmpl_t to build the nested structure rather than a fr_dict_attr_t.

Parameters

[in]	ctx	to allocate new pair(s) in
[out]	out	Leaf pair we allocated.
[in]	list	to insert into.
[in]	vpt	tmpl representing the attribute to add.
[in]	skip_list	skip list attr ref at the head of the tmpl.

Returns

0 on success.
-1 on failure.

Definition at line 974 of file tmpl_eval.c.

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◆ tmpl_copy_pair_children()

int tmpl_copy_pair_children	(	TALLOC_CTX *	ctx,
		fr_pair_list_t *	out,
		request_t *	request,
		tmpl_t const *	vpt
	)

Copy children of pairs matching a tmpl_t in the current request_t.

Parameters

ctx	to allocate new fr_pair_t in.
out	Where to write the copied fr_pair_t (s).
request	The current request_t.
vpt	specifying the fr_pair_t type or list to copy. Must be one of the following types: TMPL_TYPE_ATTR

Returns

-1 if no matching fr_pair_t could be found.
-2 if list could not be found (doesn't exist in current request_t).
-3 if context could not be found (no parent request_t available).
-4 on memory allocation error.

Definition at line 841 of file tmpl_eval.c.

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◆ tmpl_copy_pairs()

int tmpl_copy_pairs	(	TALLOC_CTX *	ctx,
		fr_pair_list_t *	out,
		request_t *	request,
		tmpl_t const *	vpt
	)

Copy pairs matching a tmpl_t in the current request_t.

Parameters

ctx	to allocate new fr_pair_t in.
out	Where to write the copied fr_pair_t (s).
request	The current request_t.
vpt	specifying the fr_pair_t type or list to copy. Must be one of the following types: TMPL_TYPE_ATTR

Returns

-1 if no matching fr_pair_t could be found.
-2 if list could not be found (doesn't exist in current request_t).
-3 if context could not be found (no parent request_t available).
-4 on memory allocation error.

Definition at line 798 of file tmpl_eval.c.

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◆ tmpl_eval()

int tmpl_eval	(	TALLOC_CTX *	ctx,
		fr_value_box_list_t *	out,
		request_t *	request,
		tmpl_t const *	vpt
	)

Gets the value of a tmpl.

The result is returned "raw". The caller must do any escaping it desires.

Parameters

[in]	ctx	to allocate boxed value, and buffers in.
[out]	out	Where to write the boxed value.
[in]	request	The current request.
[in]	vpt	Representing the tmpl

Returns

<0 we failed getting a value for the tmpl
0 we successfully evaluated the tmpl

Definition at line 1221 of file tmpl_eval.c.

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◆ tmpl_eval_cast_in_place()

int tmpl_eval_cast_in_place	(	fr_value_box_list_t *	list,
		request_t *	request,
		tmpl_t const *	vpt
	)

Casts a value or list of values according to the tmpl.

Parameters

[in,out]	list	Where to write the boxed value.
[in]	request	The current request.
[in]	vpt	Representing the attribute.

Returns

<0 the cast failed
0 we successfully evaluated the tmpl

Definition at line 1349 of file tmpl_eval.c.

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◆ tmpl_eval_escape_uctx_alloc()

static void * tmpl_eval_escape_uctx_alloc	(	request_t *	request,
		tmpl_escape_t const *	escape
	)

inlinestatic

Allocate a uctx for an escaping function.

Parameters

[in]	request	The current request.
[in]	escape	Describing how to escape tmpl data.

Returns: the uctx to pass to the escape function.

Definition at line 1293 of file tmpl_eval.c.

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◆ tmpl_eval_escape_uctx_free()

static void tmpl_eval_escape_uctx_free	(	tmpl_escape_t const *	escape,
		void *	uctx
	)

inlinestatic

Free a uctx for an escaping function.

Parameters

[in]	escape	Describing how to escape tmpl data.
[in]	uctx	The uctx to free.

Definition at line 1324 of file tmpl_eval.c.

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◆ tmpl_eval_pair()

int tmpl_eval_pair	(	TALLOC_CTX *	ctx,
		fr_value_box_list_t *	out,
		request_t *	request,
		tmpl_t const *	vpt
	)

Gets the value of a real or virtual attribute.

Parameters

[in]	ctx	to allocate boxed value, and buffers in.
[out]	out	Where to write the boxed value.
[in]	request	The current request.
[in]	vpt	Representing the attribute.

Returns

<0 we failed getting a value for the attribute.
0 we successfully evaluated the tmpl

Definition at line 1077 of file tmpl_eval.c.

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◆ tmpl_expanded_type()

fr_type_t tmpl_expanded_type ( tmpl_t const * vpt )

Return the native data type of the expression.

Parameters

[in] vpt to determine the type of.

Returns

FR_TYPE_NULL if the type of the tmpl_t can't be determined.
The data type we'd expect the tmpl_t to produce at runtime when expanded.

Definition at line 209 of file tmpl_eval.c.

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◆ tmpl_find_or_add_vp()

int tmpl_find_or_add_vp	(	fr_pair_t **	out,
		request_t *	request,
		tmpl_t const *	vpt
	)

Returns the first VP matching a tmpl_t, or if no VPs match, creates a new one.

Parameters

[out]	out	where to write the retrieved or created vp.
[in]	request	The current request_t.
[in]	vpt	specifying the fr_pair_t type to retrieve or create. Must be TMPL_TYPE_ATTR.

Returns

1 on success a pair was created.
0 on success a pair was found.
-1 if a new fr_pair_t couldn't be found or created.
-2 if list could not be found (doesn't exist in current request_t).
-3 if context could not be found (no parent request_t available).

Definition at line 918 of file tmpl_eval.c.

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◆ tmpl_find_vp()

int tmpl_find_vp	(	fr_pair_t **	out,
		request_t *	request,
		tmpl_t const *	vpt
	)

Returns the first VP matching a tmpl_t.

Parameters

[out]	out	where to write the retrieved vp.
[in]	request	The current request_t.
[in]	vpt	specifying the fr_pair_t type to find. Must be one of the following types: TMPL_TYPE_ATTR

Returns

0 on success (found matching fr_pair_t).
-1 if no matching fr_pair_t could be found.
-2 if list could not be found (doesn't exist in current request_t).
-3 if context could not be found (no parent request_t available).

Definition at line 889 of file tmpl_eval.c.

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◆ tmpl_global_init()

int tmpl_global_init ( void )

Definition at line 1485 of file tmpl_eval.c.

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◆ tmpl_list_ctx()

TALLOC_CTX * tmpl_list_ctx	(	request_t *	request,
		fr_dict_attr_t const *	list
	)

Return the correct TALLOC_CTX to alloc fr_pair_t in, for a list.

Allocating new fr_pair_t in the context of a request_t is usually wrong. fr_pair_t should be allocated in the context of a fr_packet_t, so that if the fr_packet_t is freed before the request_t, the associated fr_pair_t lists are freed too.

Parameters

[in]	request	containing the target lists.
[in]	list	fr_pair_list_t value to resolve to TALLOC_CTX.

Returns

TALLOC_CTX on success.
NULL on failure.

See also: tmpl_pair_list

Definition at line 116 of file tmpl_eval.c.

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◆ tmpl_list_head()

fr_pair_list_t * tmpl_list_head	(	request_t *	request,
		fr_dict_attr_t const *	list
	)

Resolve attribute fr_pair_list_t value to an attribute list.

The value returned is a pointer to the pointer of the HEAD of a fr_pair_t list in the request_t. If the head of the list changes, the pointer will still be valid.

Parameters

[in]	request	containing the target lists.
[in]	list	fr_pair_list_t value to resolve to fr_pair_t list. Will be NULL if list name couldn't be resolved.

Returns: a pointer to the HEAD of a list in the request_t.

See also: tmpl_dcursor_init

Definition at line 76 of file tmpl_eval.c.

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◆ tmpl_packet_ptr()

fr_packet_t * tmpl_packet_ptr	(	request_t *	request,
		fr_dict_attr_t const *	list
	)

Resolve a list to the fr_packet_t holding the HEAD pointer for a fr_pair_t list.

Returns a pointer to the fr_packet_t that holds the HEAD pointer of a given list, for the current request_t.

Parameters

[in]	request	To resolve list in.
[in]	list	fr_pair_list_t value to resolve to fr_packet_t.

Returns

fr_packet_t on success.
NULL on failure.

See also: tmpl_pair_list

Definition at line 146 of file tmpl_eval.c.

◆ tmpl_request_ptr()

int tmpl_request_ptr	(	request_t **	context,
		FR_DLIST_HEAD(tmpl_request_list) const *	rql
	)

Resolve a tmpl_request_ref_t to a request_t.

Sometimes request_t structs may be chained to each other, as is the case when internally proxying EAP. This function resolves a tmpl_request_ref_t to a request_t higher in the chain than the current request_t.

See also: tmpl_pair_list

Parameters

[in,out]	context	request_t to start resolving from, and where to write a pointer to the resolved request_t back to.
[in]	rql	list of request qualifiers to follow.

Returns

0 if request is valid in this context.
-1 if request is not valid in this context.

Definition at line 169 of file tmpl_eval.c.

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◆ tmpl_value_list_insert_tail()

int tmpl_value_list_insert_tail	(	fr_value_box_list_t *	list,
		fr_value_box_t *	box,
		tmpl_t const *	vpt
	)

Insert a value-box to a list, with casting.

Parameters

list	to append to
box	box to cast / append
vpt	tmpl with cast.

Returns

<0 for "cast failed"
0 for success

Definition at line 1052 of file tmpl_eval.c.

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◆ VALUE_BOX_LIST_VERIFY()

VALUE_BOX_LIST_VERIFY ( list )

Variable Documentation

◆ dict_freeradius

fr_dict_t const* dict_freeradius

static

Definition at line 48 of file tmpl_eval.c.

◆ dict_radius

fr_dict_t const* dict_radius

static

Definition at line 49 of file tmpl_eval.c.

◆ success

goto success

Definition at line 1455 of file tmpl_eval.c.

◆ tmpl_attr_unspec

fr_dict_attr_t const * tmpl_attr_unspec

Placeholder attribute for uses of unspecified attribute references.

Definition at line 61 of file tmpl_eval.c.

◆ tmpl_dict

fr_dict_autoload_t tmpl_dict

Initial value:

= {
        { .out = &dict_freeradius, .proto = "freeradius" },
        { .out = &dict_radius, .proto = "radius" }, 
        { NULL }
}

Definition at line 52 of file tmpl_eval.c.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ _TMPL_PRIVATE

Function Documentation

◆ _tmpl_global_free()

◆ _tmpl_global_init()

◆ _tmpl_to_atype()

◆ _tmpl_to_type()

◆ if() [1/2]

◆ if() [2/2]

◆ pair_append_by_tmpl_parent()

◆ tmpl_copy_pair_children()

◆ tmpl_copy_pairs()

◆ tmpl_eval()

◆ tmpl_eval_cast_in_place()

◆ tmpl_eval_escape_uctx_alloc()

◆ tmpl_eval_escape_uctx_free()

◆ tmpl_eval_pair()

◆ tmpl_expanded_type()

◆ tmpl_find_or_add_vp()

◆ tmpl_find_vp()

◆ tmpl_global_init()

◆ tmpl_list_ctx()

◆ tmpl_list_head()

◆ tmpl_packet_ptr()

◆ tmpl_request_ptr()

◆ tmpl_value_list_insert_tail()

◆ VALUE_BOX_LIST_VERIFY()

Variable Documentation

◆ dict_freeradius

◆ dict_radius

◆ success

◆ tmpl_attr_unspec

◆ tmpl_dict