snmp.c File Reference

#include <freeradius-devel/util/atexit.h>
#include <freeradius-devel/util/debug.h>
#include <freeradius-devel/util/misc.h>
#include <freeradius-devel/util/proto.h>
#include <freeradius-devel/util/value.h>
#include <freeradius-devel/server/dependency.h>
#include <freeradius-devel/server/main_loop.h>
#include <freeradius-devel/protocol/snmp/freeradius.h>

Include dependency graph for snmp.c:

Go to the source code of this file.

Data Structures
struct	fr_snmp_map
	Maps a fr_pair_t to the source of a value. More...
union	fr_snmp_map.__unnamed69__

Macros
#define	FR_FREERADIUS_SNMP_TYPE_OBJECT   0
#define	SNMP_MAP_TERMINATOR   { .name = NULL, .da = NULL, .type = 0 }

Typedefs
typedef int(*	fr_snmp_get_func_t) (TALLOC_CTX *ctx, fr_value_box_t *out, fr_snmp_map_t const *map, void *snmp_ctx)
typedef int(*	fr_snmp_index_func_t) (TALLOC_CTX *ctx, void **snmp_ctx_out, fr_snmp_map_t const *map, void const *snmp_ctx_in, uint32_t index)
typedef struct fr_snmp_map	fr_snmp_map_t
typedef int(*	fr_snmp_set_func_t) (fr_snmp_map_t const *map, void *snmp_ctx, fr_value_box_t *data)

Functions
static int	_fr_snmp_free (UNUSED void *uctx)
static int	_fr_snmp_init (UNUSED void *uctx)
static int	_fr_snmp_init_r (fr_snmp_map_t map[], fr_dict_attr_t const *parent)
	Internal SNMP initialisation function (used for recursion) More...
int	fr_snmp_init (void)
	Initialise the tree of SNMP map structures used to attach callbacks to OIDs. More...
int	fr_snmp_process (request_t *request)
static int	snmp_auth_client_stats_offset_get (UNUSED TALLOC_CTX *ctx, fr_value_box_t *out, fr_snmp_map_t const *map, void *snmp_ctx)
static int	snmp_auth_stats_offset_get (UNUSED TALLOC_CTX *ctx, fr_value_box_t *out, fr_snmp_map_t const *map, UNUSED void *snmp_ctx)
static int	snmp_client_id_get (TALLOC_CTX *ctx, fr_value_box_t *out, NDEBUG_UNUSED fr_snmp_map_t const *map, void *snmp_ctx)
static int	snmp_client_index (UNUSED TALLOC_CTX *ctx, void **snmp_ctx_out, UNUSED fr_snmp_map_t const *map, NDEBUG_UNUSED void const *snmp_ctx_in, uint32_t index_num)
static int	snmp_client_index_get (UNUSED TALLOC_CTX *ctx, fr_value_box_t *out, UNUSED fr_snmp_map_t const *map, void *snmp_ctx)
static int	snmp_client_ipv4addr_get (UNUSED TALLOC_CTX *ctx, fr_value_box_t *out, NDEBUG_UNUSED fr_snmp_map_t const *map, void *snmp_ctx)
static int	snmp_config_reset_get (UNUSED TALLOC_CTX *ctx, fr_value_box_t *out, NDEBUG_UNUSED fr_snmp_map_t const *map, UNUSED void *snmp_ctx)
static int	snmp_config_reset_set (NDEBUG_UNUSED fr_snmp_map_t const *map, UNUSED void *snmp_ctx, fr_value_box_t *in)
static int	snmp_config_reset_time_get (UNUSED TALLOC_CTX *ctx, fr_value_box_t *out, NDEBUG_UNUSED fr_snmp_map_t const *map, UNUSED void *snmp_ctx)
static fr_snmp_map_t const *	snmp_map_search (fr_snmp_map_t const map[], fr_dict_attr_t const *da)
	Perform a binary search to find a map matching a da. More...
static void	snmp_next_leaf (fr_da_stack_t *da_stack, unsigned int depth, fr_snmp_map_t const *map)
	Perform depth first traversal of the tree until we hit a leaf node. More...
static ssize_t	snmp_process (fr_dcursor_t *out, request_t *request, fr_da_stack_t *da_stack, unsigned int depth, fr_dcursor_t *cursor, fr_snmp_map_t const *map, void *snmp_ctx, unsigned int snmp_op)
	Traverse a tree of SNMP maps. More...
static ssize_t	snmp_process_index (fr_dcursor_t *out, request_t *request, fr_da_stack_t *da_stack, unsigned int depth, fr_dcursor_t cursor, fr_snmp_map_t const *map, void *snmp_ctx, unsigned int snmp_op, uint32_t index_num)
static ssize_t	snmp_process_index_attr (fr_dcursor_t *out, request_t *request, fr_da_stack_t *da_stack, unsigned int depth, fr_dcursor_t *cursor, fr_snmp_map_t const *map, void *snmp_ctx, unsigned int snmp_op)
static ssize_t	snmp_process_leaf (fr_dcursor_t *out, request_t *request, fr_da_stack_t *da_stack, unsigned int depth, fr_dcursor_t *cursor, fr_snmp_map_t const *map, void *snmp_ctx, unsigned int snmp_op)
static ssize_t	snmp_process_tlv (fr_dcursor_t *out, request_t *request, fr_da_stack_t *da_stack, unsigned int depth, fr_dcursor_t *cursor, fr_snmp_map_t const *map, void *snmp_ctx, unsigned int snmp_op)
static int	snmp_value_serv_ident_get (TALLOC_CTX *ctx, fr_value_box_t *out, NDEBUG_UNUSED fr_snmp_map_t const *map, UNUSED void *snmp_ctx)
static int	snmp_value_uptime_get (UNUSED TALLOC_CTX *ctx, fr_value_box_t *out, NDEBUG_UNUSED fr_snmp_map_t const *map, UNUSED void *snmp_ctx)

Variables
static fr_dict_attr_t const *	attr_snmp_failure
static fr_dict_attr_t const *	attr_snmp_operation
static fr_dict_attr_t const *	attr_snmp_root
static fr_dict_attr_t const *	attr_snmp_type
static fr_dict_t const *	dict_snmp
static int	reset_state = FR_RADIUS_AUTH_SERV_CONFIG_RESET_VALUE_RUNNING
static fr_time_t	reset_time
static fr_snmp_map_t	snmp_auth_client_entry []
static fr_snmp_map_t	snmp_auth_client_entry_counters []
static fr_snmp_map_t	snmp_auth_serv []
static fr_snmp_map_t	snmp_auth_serv_counters []
static fr_snmp_map_t	snmp_auth_serv_mib []
static fr_snmp_map_t	snmp_auth_serv_mib_objects []
static fr_snmp_map_t	snmp_authentication []
fr_dict_autoload_t	snmp_dict []
fr_dict_attr_autoload_t	snmp_dict_attr []
static fr_snmp_map_t	snmp_dod []
static fr_snmp_map_t	snmp_internet []
static fr_snmp_map_t	snmp_iso []
static fr_snmp_map_t	snmp_mgmt []
static fr_snmp_map_t	snmp_mib_2 []
static fr_snmp_map_t	snmp_org []
static fr_snmp_map_t	snmp_radius_mib []
static fr_time_t	start_time

---

Data Structure Documentation

fr_snmp_map

struct fr_snmp_map

Maps a fr_pair_t to the source of a value.

Note

Arrays of maps must be in ascending attribute order. This is because the lookup is performed using a binary search, not by index.

Mappings between attributes and snmp values are more complex in an SNMP based interface, because we need to traverse the tree, looking at indexes in multiple levels of mapping tables.

Definition at line 85 of file snmp.c.

Collaboration diagram for fr_snmp_map:

Data Fields
union fr_snmp_map	__unnamed__
fr_snmp_map_t *	child	Child map.
fr_dict_attr_t const *	da	Dictionary attribute (resolved from attribute number).
fr_snmp_get_func_t	get	Function to retrieve value.
fr_snmp_index_func_t	index	Function for traversing indexes.
char const *	name	Attribute number. Table entries must be in attribute number order.
fr_snmp_set_func_t	set	Function to write a new value.
unsigned int	type	SNMP type - More specific than attribute type.

fr_snmp_map.__unnamed69__

union fr_snmp_map.__unnamed69__

Definition at line 95 of file snmp.c.

Data Fields
fr_snmp_map_t *	last	Last sibling at this level.
size_t	offset	Offset in snmp_ctx (passed to index function).

Macro Definition Documentation

FR_FREERADIUS_SNMP_TYPE_OBJECT

#define FR_FREERADIUS_SNMP_TYPE_OBJECT   0

Definition at line 64 of file snmp.c.

SNMP_MAP_TERMINATOR

#define SNMP_MAP_TERMINATOR   { .name = NULL, .da = NULL, .type = 0 }

Definition at line 66 of file snmp.c.

Typedef Documentation

fr_snmp_get_func_t

typedef int(* fr_snmp_get_func_t) (TALLOC_CTX *ctx, fr_value_box_t *out, fr_snmp_map_t const *map, void *snmp_ctx)

Definition at line 70 of file snmp.c.

fr_snmp_index_func_t

typedef int(* fr_snmp_index_func_t) (TALLOC_CTX *ctx, void **snmp_ctx_out, fr_snmp_map_t const *map, void const *snmp_ctx_in, uint32_t index)

Definition at line 72 of file snmp.c.

fr_snmp_map_t

typedef struct fr_snmp_map fr_snmp_map_t

Definition at line 56 of file snmp.c.

fr_snmp_set_func_t

typedef int(* fr_snmp_set_func_t) (fr_snmp_map_t const *map, void *snmp_ctx, fr_value_box_t *data)

Definition at line 71 of file snmp.c.

Function Documentation

_fr_snmp_free()

static int _fr_snmp_free ( UNUSED void *  uctx )

static

Definition at line 1119 of file snmp.c.

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_fr_snmp_init()

static int _fr_snmp_init ( UNUSED void *  uctx )

static

Definition at line 1101 of file snmp.c.

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_fr_snmp_init_r()

static int _fr_snmp_init_r ( fr_snmp_map_t  map[], fr_dict_attr_t const *  parent  )

static

Internal SNMP initialisation function (used for recursion)

Definition at line 1058 of file snmp.c.

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fr_snmp_init()

int fr_snmp_init

(

void

)

Initialise the tree of SNMP map structures used to attach callbacks to OIDs.

Definition at line 1129 of file snmp.c.

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fr_snmp_process()

int fr_snmp_process

(

request_t *

request

)

Definition at line 925 of file snmp.c.

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snmp_auth_client_stats_offset_get()

static int snmp_auth_client_stats_offset_get ( UNUSED TALLOC_CTX *  ctx, fr_value_box_t *  out, fr_snmp_map_t const *  map, void *  snmp_ctx  )

static

Definition at line 253 of file snmp.c.

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snmp_auth_stats_offset_get()

static int snmp_auth_stats_offset_get ( UNUSED TALLOC_CTX *  ctx, fr_value_box_t *  out, fr_snmp_map_t const *  map, UNUSED void *  snmp_ctx  )

static

Definition at line 181 of file snmp.c.

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snmp_client_id_get()

static int snmp_client_id_get ( TALLOC_CTX *  ctx, fr_value_box_t *  out, NDEBUG_UNUSED fr_snmp_map_t const *  map, void *  snmp_ctx  )

static

Definition at line 240 of file snmp.c.

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snmp_client_index()

static int snmp_client_index ( UNUSED TALLOC_CTX *  ctx, void **  snmp_ctx_out, UNUSED fr_snmp_map_t const *  map, NDEBUG_UNUSED void const *  snmp_ctx_in, uint32_t  index_num  )

static

Definition at line 191 of file snmp.c.

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snmp_client_index_get()

static int snmp_client_index_get ( UNUSED TALLOC_CTX *  ctx, fr_value_box_t *  out, UNUSED fr_snmp_map_t const *  map, void *  snmp_ctx  )

static

Definition at line 207 of file snmp.c.

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snmp_client_ipv4addr_get()

static int snmp_client_ipv4addr_get ( UNUSED TALLOC_CTX *  ctx, fr_value_box_t *  out, NDEBUG_UNUSED fr_snmp_map_t const *  map, void *  snmp_ctx  )

static

Definition at line 219 of file snmp.c.

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snmp_config_reset_get()

static int snmp_config_reset_get ( UNUSED TALLOC_CTX *  ctx, fr_value_box_t *  out, NDEBUG_UNUSED fr_snmp_map_t const *  map, UNUSED void *  snmp_ctx  )

static

Definition at line 155 of file snmp.c.

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snmp_config_reset_set()

static int snmp_config_reset_set ( NDEBUG_UNUSED fr_snmp_map_t const *  map, UNUSED void *  snmp_ctx, fr_value_box_t *  in  )

static

Definition at line 165 of file snmp.c.

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snmp_config_reset_time_get()

static int snmp_config_reset_time_get ( UNUSED TALLOC_CTX *  ctx, fr_value_box_t *  out, NDEBUG_UNUSED fr_snmp_map_t const *  map, UNUSED void *  snmp_ctx  )

static

Definition at line 136 of file snmp.c.

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snmp_map_search()

static fr_snmp_map_t const* snmp_map_search ( fr_snmp_map_t const  map[], fr_dict_attr_t const *  da  )

static

Perform a binary search to find a map matching a da.

Parameters

map	to search in.
da	to search for.

Returns

• Matching map if da was found.
• NULL if da was not found.

Definition at line 473 of file snmp.c.

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snmp_next_leaf()

static void snmp_next_leaf ( fr_da_stack_t *  da_stack, unsigned int  depth, fr_snmp_map_t const *  map  )

static

Perform depth first traversal of the tree until we hit a leaf node.

This is used for building a fake da_stack, for findNext, so that if we get a findNext operation on something that's not a leaf, we can find the first leaf under that branch of the tree.

Parameters

[out]	da_stack	to rewrite.
[in]	depth	at which to start rewriting.
[in]	map	at this level.

Definition at line 512 of file snmp.c.

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snmp_process()

static ssize_t snmp_process ( fr_dcursor_t *  out, request_t *  request, fr_da_stack_t *  da_stack, unsigned int  depth, fr_dcursor_t *  cursor, fr_snmp_map_t const *  map, void *  snmp_ctx, unsigned int  snmp_op  )

static

Traverse a tree of SNMP maps.

Parameters

[out]	out	Where to write response attributes.
[in]	request	The current request.
[in,out]	da_stack	we're traversing.
[in]	depth	we're currently at in the da_stack.
[in]	cursor	representing the current attribute we're processing.
[in]	map	matching the current depth in the da_stack.
[in]	snmp_ctx	allocated by the previous index traversal function.
[in]	snmp_op	we're performing.

Returns

• 0 on success.
• 1 to signal caller that it should find the next OID at this level and recurse again.
• <0 the depth at which an error occurred, as a negative integer.

Definition at line 872 of file snmp.c.

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snmp_process_index()

static ssize_t snmp_process_index ( fr_dcursor_t *  out, request_t *  request, fr_da_stack_t *  da_stack, unsigned int  depth, fr_dcursor_t  cursor, fr_snmp_map_t const *  map, void *  snmp_ctx, unsigned int  snmp_op, uint32_t  index_num  )

static

Definition at line 524 of file snmp.c.

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snmp_process_index_attr()

static ssize_t snmp_process_index_attr ( fr_dcursor_t *  out, request_t *  request, fr_da_stack_t *  da_stack, unsigned int  depth, fr_dcursor_t *  cursor, fr_snmp_map_t const *  map, void *  snmp_ctx, unsigned int  snmp_op  )

static

Definition at line 615 of file snmp.c.

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snmp_process_leaf()

static ssize_t snmp_process_leaf ( fr_dcursor_t *  out, request_t *  request, fr_da_stack_t *  da_stack, unsigned int  depth, fr_dcursor_t *  cursor, fr_snmp_map_t const *  map, void *  snmp_ctx, unsigned int  snmp_op  )

static

Definition at line 736 of file snmp.c.

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snmp_process_tlv()

static ssize_t snmp_process_tlv ( fr_dcursor_t *  out, request_t *  request, fr_da_stack_t *  da_stack, unsigned int  depth, fr_dcursor_t *  cursor, fr_snmp_map_t const *  map, void *  snmp_ctx, unsigned int  snmp_op  )

static

Definition at line 674 of file snmp.c.

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snmp_value_serv_ident_get()

static int snmp_value_serv_ident_get ( TALLOC_CTX *  ctx, fr_value_box_t *  out, NDEBUG_UNUSED fr_snmp_map_t const *  map, UNUSED void *  snmp_ctx  )

static

Definition at line 107 of file snmp.c.

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snmp_value_uptime_get()

static int snmp_value_uptime_get ( UNUSED TALLOC_CTX *  ctx, fr_value_box_t *  out, NDEBUG_UNUSED fr_snmp_map_t const *  map, UNUSED void *  snmp_ctx  )

static

Definition at line 117 of file snmp.c.

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Variable Documentation

attr_snmp_failure

fr_dict_attr_t const* attr_snmp_failure

static

Definition at line 52 of file snmp.c.

attr_snmp_operation

fr_dict_attr_t const* attr_snmp_operation

static

Definition at line 50 of file snmp.c.

attr_snmp_root

fr_dict_attr_t const* attr_snmp_root

static

Definition at line 53 of file snmp.c.

attr_snmp_type

fr_dict_attr_t const* attr_snmp_type

static

Definition at line 51 of file snmp.c.

dict_snmp

fr_dict_t const* dict_snmp

static

Definition at line 42 of file snmp.c.

reset_state

int reset_state = FR_RADIUS_AUTH_SERV_CONFIG_RESET_VALUE_RUNNING

static

Definition at line 105 of file snmp.c.

reset_time

fr_time_t reset_time

static

Definition at line 104 of file snmp.c.

snmp_auth_client_entry

fr_snmp_map_t snmp_auth_client_entry[]

static

Initial value:

= {
        { .name = "Radius-Auth-Client-Entry",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .index = snmp_client_index,
          .child = snmp_auth_client_entry_counters },
        SNMP_MAP_TERMINATOR
}

Definition at line 315 of file snmp.c.

snmp_auth_client_entry_counters

fr_snmp_map_t snmp_auth_client_entry_counters[]

static

Definition at line 266 of file snmp.c.

snmp_auth_serv

fr_snmp_map_t snmp_auth_serv[]

static

Initial value:

= {
        { .name = "Radius-Auth-Serv",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_auth_serv_counters },
        SNMP_MAP_TERMINATOR
}

Definition at line 383 of file snmp.c.

snmp_auth_serv_counters

fr_snmp_map_t snmp_auth_serv_counters[]

static

Definition at line 323 of file snmp.c.

snmp_auth_serv_mib

fr_snmp_map_t snmp_auth_serv_mib[]

static

Initial value:

= {
        { .name = "Radius-Auth-Serv-Mib",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_auth_serv_mib_objects },
        SNMP_MAP_TERMINATOR
}

Definition at line 397 of file snmp.c.

snmp_auth_serv_mib_objects

fr_snmp_map_t snmp_auth_serv_mib_objects[]

static

Initial value:

= {
        { .name = "Radius-Auth-Serv-Mib-Objects",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_auth_serv },
        SNMP_MAP_TERMINATOR
}

Definition at line 390 of file snmp.c.

snmp_authentication

fr_snmp_map_t snmp_authentication[]

static

Initial value:

= {
        { .name = "Radius-Authentication",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_auth_serv_mib },
        SNMP_MAP_TERMINATOR
}

Definition at line 404 of file snmp.c.

snmp_dict

fr_dict_autoload_t snmp_dict

Initial value:

= {
        { .out = &dict_snmp, .proto = "snmp" },
        { NULL }
}

Definition at line 45 of file snmp.c.

snmp_dict_attr

fr_dict_attr_autoload_t snmp_dict_attr

Initial value:

= {
        { .out = &attr_snmp_operation, .name = "FreeRADIUS-SNMP-Operation", .type = FR_TYPE_UINT8, .dict = &dict_snmp },
        { .out = &attr_snmp_type, .name = "FreeRADIUS-SNMP-Type", .type = FR_TYPE_UINT8, .dict = &dict_snmp },
        { .out = &attr_snmp_failure, .name = "FreeRADIUS-SNMP-Failure", .type = FR_TYPE_UINT8, .dict = &dict_snmp },
        { .out = &attr_snmp_root, .name = "FreeRADIUS-Iso", .type = FR_TYPE_TLV, .dict = &dict_snmp },
        { NULL }
}

Definition at line 56 of file snmp.c.

snmp_dod

fr_snmp_map_t snmp_dod[]

static

Initial value:

= {
        { .name = "FreeRADIUS-Dod",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_internet },
        SNMP_MAP_TERMINATOR
}

Definition at line 439 of file snmp.c.

snmp_internet

fr_snmp_map_t snmp_internet[]

static

Initial value:

= {
        { .name = "FreeRADIUS-Internet",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_mgmt },
        SNMP_MAP_TERMINATOR
}

Definition at line 432 of file snmp.c.

snmp_iso

fr_snmp_map_t snmp_iso[]

static

Initial value:

= {
        { .name = "FreeRADIUS-Iso",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_org },
        SNMP_MAP_TERMINATOR
}

Definition at line 453 of file snmp.c.

snmp_mgmt

fr_snmp_map_t snmp_mgmt[]

static

Initial value:

= {
        { .name = "FreeRADIUS-Mgmt",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_mib_2 },
        SNMP_MAP_TERMINATOR
}

Definition at line 425 of file snmp.c.

snmp_mib_2

fr_snmp_map_t snmp_mib_2[]

static

Initial value:

= {
        { .name = "FreeRADIUS-Mib-2",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_radius_mib },
        SNMP_MAP_TERMINATOR
}

Definition at line 418 of file snmp.c.

snmp_org

fr_snmp_map_t snmp_org[]

static

Initial value:

= {
        { .name = "FreeRADIUS-Org",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_dod },
        SNMP_MAP_TERMINATOR
}

Definition at line 446 of file snmp.c.

snmp_radius_mib

fr_snmp_map_t snmp_radius_mib[]

static

Initial value:

= {
        { .name = "Radius-Mib",
          .type = FR_FREERADIUS_SNMP_TYPE_OBJECT,
          .child = snmp_authentication },
        SNMP_MAP_TERMINATOR
}

Definition at line 411 of file snmp.c.

start_time

fr_time_t start_time

static

Definition at line 103 of file snmp.c.