radius_snmp.c

radius server在linux下的源码

/*
 * radius_snmp.c	Radius SNMP support
 *
 * Version:	$Id: radius_snmp.c,v 1.17 2004/02/26 19:04:24 aland Exp $
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Copyright 2000  The FreeRADIUS server project
 * Copyright 2000  Jochen Friedrich <[e-mail]>
 */

static const char rcsid[] =
"$Id: radius_snmp.c,v 1.17 2004/02/26 19:04:24 aland Exp $";

#include "autoconf.h"

#ifdef WITH_SNMP

#include "libradius.h"

#ifdef HAVE_NETINET_IN_H
#	include <netinet/in.h>
#endif

#include <string.h>

#include "radius_snmp.h"
#include "radiusd.h"
#include "conffile.h"

extern int need_reload;

/*
 *	More globals (sigh);
 */
rad_snmp_t		rad_snmp;


#define RADACCOID 1,3,6,1,2,1,67,2,1,1,1
#define RADAUTHOID 1,3,6,1,2,1,67,1,1,1,1
#define RADIUSOID 1,3,6,1,4,1,3317,1,3,1

static oid radacc_oid [] = { RADACCOID };
static oid radauth_oid [] = { RADAUTHOID };
static oid radius_oid [] = { RADIUSOID };

#define COUNTER ASN_COUNTER
#define INTEGER ASN_INTEGER
#define GAUGE ASN_GAUGE
#define TIMETICKS ASN_TIMETICKS
#define IPADDRESS ASN_IPADDRESS
#define STRING ASN_OCTET_STR

#define RADIUSACCSERVIDENT               1
#define RADIUSACCSERVUPTIME              2
#define RADIUSACCSERVRESETTIME           3
#define RADIUSACCSERVCONFIGRESET         4
#define RADIUSACCSERVTOTALREQUESTS       5
#define RADIUSACCSERVTOTALINVALIDREQUESTS 6
#define RADIUSACCSERVTOTALDUPREQUESTS    7
#define RADIUSACCSERVTOTALRESPONSES      8
#define RADIUSACCSERVTOTALMALFORMEDREQUESTS 9
#define RADIUSACCSERVTOTALBADAUTHENTICATORS 10
#define RADIUSACCSERVTOTALPACKETSDROPPED 11
#define RADIUSACCSERVTOTALNORECORDS      12
#define RADIUSACCSERVTOTALUNKNOWNTYPES   13
/* */
#define RADIUSACCCLIENTADDRESS           2
#define RADIUSACCCLIENTID                3
#define RADIUSACCSERVPACKETSDROPPED      4
#define RADIUSACCSERVREQUESTS            5
#define RADIUSACCSERVDUPREQUESTS         6
#define RADIUSACCSERVRESPONSES           7
#define RADIUSACCSERVBADAUTHENTICATORS   8
#define RADIUSACCSERVMALFORMEDREQUESTS   9
#define RADIUSACCSERVNORECORDS           10
#define RADIUSACCSERVUNKNOWNTYPES        11
/* */
#define RADIUSAUTHSERVIDENT              1
#define RADIUSAUTHSERVUPTIME             2
#define RADIUSAUTHSERVRESETTIME          3
#define RADIUSAUTHSERVCONFIGRESET        4
#define RADIUSAUTHSERVTOTALACCESSREQUESTS 5
#define RADIUSAUTHSERVTOTALINVALIDREQUESTS 6
#define RADIUSAUTHSERVTOTALDUPACCESSREQUESTS 7
#define RADIUSAUTHSERVTOTALACCESSACCEPTS 8
#define RADIUSAUTHSERVTOTALACCESSREJECTS 9
#define RADIUSAUTHSERVTOTALACCESSCHALLENGES 10
#define RADIUSAUTHSERVTOTALMALFORMEDACCESSREQUESTS 11
#define RADIUSAUTHSERVTOTALBADAUTHENTICATORS 12
#define RADIUSAUTHSERVTOTALPACKETSDROPPED 13
#define RADIUSAUTHSERVTOTALUNKNOWNTYPES  14
/* */
#define RADIUSAUTHCLIENTADDRESS          2
#define RADIUSAUTHCLIENTID               3
#define RADIUSAUTHSERVACCESSREQUESTS     4
#define RADIUSAUTHSERVDUPACCESSREQUESTS  5
#define RADIUSAUTHSERVACCESSACCEPTS      6
#define RADIUSAUTHSERVACCESSREJECTS      7
#define RADIUSAUTHSERVACCESSCHALLENGES   8
#define RADIUSAUTHSERVMALFORMEDACCESSREQUESTS 9
#define RADIUSAUTHSERVBADAUTHENTICATORS  10
#define RADIUSAUTHSERVPACKETSDROPPED     11
#define RADIUSAUTHSERVUNKNOWNTYPES       12

/* Hook functions. */
static const unsigned char *radAccServ(struct variable *vp,
	oid     *name,
	size_t  *length,
	int     exact,
	size_t  *var_len,
	WriteMethod **write_method);
static const unsigned char *radAccEntry(struct variable *vp,
	oid     *name,
	size_t  *length,
	int     exact,
	size_t  *var_len,
	WriteMethod **write_method);
static const u_char *radAuthServ(struct variable *vp,
	oid     *name,
	size_t  *length,
	int     exact,
	size_t  *var_len,
	WriteMethod **write_method);
static const unsigned char *radAuthEntry(struct variable *vp,
	oid     *name,
	size_t  *length,
	int     exact,
	size_t  *var_len,
	WriteMethod **write_method);

static struct variable radiusacc_variables[] =
{
	{RADIUSACCSERVIDENT, STRING, RONLY, radAccServ, 1, {1}},
	{RADIUSACCSERVUPTIME, TIMETICKS, RONLY, radAccServ, 1, {2}},
	{RADIUSACCSERVRESETTIME, TIMETICKS, RONLY, radAccServ, 1, {3}},
	{RADIUSACCSERVCONFIGRESET, INTEGER, RWRITE, radAccServ, 1, {4}},
	{RADIUSACCSERVTOTALREQUESTS, COUNTER, RONLY, radAccServ, 1, {5}},
	{RADIUSACCSERVTOTALINVALIDREQUESTS, COUNTER, RONLY, radAccServ, 1, {6}},
	{RADIUSACCSERVTOTALDUPREQUESTS, COUNTER, RONLY, radAccServ, 1, {7}},
	{RADIUSACCSERVTOTALRESPONSES, COUNTER, RONLY, radAccServ, 1, {8}},
	{RADIUSACCSERVTOTALMALFORMEDREQUESTS, COUNTER, RONLY, radAccServ, 1, {9}},
	{RADIUSACCSERVTOTALBADAUTHENTICATORS, COUNTER, RONLY, radAccServ, 1, {10}},
	{RADIUSACCSERVTOTALPACKETSDROPPED, COUNTER, RONLY, radAccServ, 1, {11}},
	{RADIUSACCSERVTOTALNORECORDS, COUNTER, RONLY, radAccServ, 1, {12}},
	{RADIUSACCSERVTOTALUNKNOWNTYPES, COUNTER, RONLY, radAccServ, 1, {13}},
	{RADIUSACCCLIENTADDRESS, IPADDRESS, RONLY, radAccEntry, 3, {14,1,2}},
	{RADIUSACCCLIENTID, STRING, RONLY, radAccEntry, 3, {14,1,3}},
	{RADIUSACCSERVPACKETSDROPPED, COUNTER, RONLY, radAccEntry, 3, {14,1,4}},
	{RADIUSACCSERVREQUESTS, COUNTER, RONLY, radAccEntry, 3, {14,1,5}},
	{RADIUSACCSERVDUPREQUESTS, COUNTER, RONLY, radAccEntry, 3, {14,1,6}},
	{RADIUSACCSERVRESPONSES, COUNTER, RONLY, radAccEntry, 3, {14,1,7}},
	{RADIUSACCSERVBADAUTHENTICATORS, COUNTER, RONLY, radAccEntry, 3, {14,1,8}},
	{RADIUSACCSERVMALFORMEDREQUESTS, COUNTER, RONLY, radAccEntry, 3, {14,1,9}},
	{RADIUSACCSERVNORECORDS, COUNTER, RONLY, radAccEntry, 3, {14,1,10}},
	{RADIUSACCSERVUNKNOWNTYPES, COUNTER, RONLY, radAccEntry, 3, {14,1,11}},
};

static struct variable radiusauth_variables[] =
{
	{RADIUSAUTHSERVIDENT, STRING, RONLY, radAuthServ, 1, {1}},
	{RADIUSAUTHSERVUPTIME, TIMETICKS, RONLY, radAuthServ, 1, {2}},
	{RADIUSAUTHSERVRESETTIME, TIMETICKS, RONLY, radAuthServ, 1, {3}},
	{RADIUSAUTHSERVCONFIGRESET, INTEGER, RWRITE, radAuthServ, 1, {4}},
	{RADIUSAUTHSERVTOTALACCESSREQUESTS, COUNTER, RONLY, radAuthServ, 1, {5}},
	{RADIUSAUTHSERVTOTALINVALIDREQUESTS, COUNTER, RONLY, radAuthServ, 1, {6}},
	{RADIUSAUTHSERVTOTALDUPACCESSREQUESTS, COUNTER, RONLY, radAuthServ, 1, {7}},
	{RADIUSAUTHSERVTOTALACCESSACCEPTS, COUNTER, RONLY, radAuthServ, 1, {8}},
	{RADIUSAUTHSERVTOTALACCESSREJECTS, COUNTER, RONLY, radAuthServ, 1, {9}},
	{RADIUSAUTHSERVTOTALACCESSCHALLENGES, COUNTER, RONLY, radAuthServ, 1, {10}},
	{RADIUSAUTHSERVTOTALMALFORMEDACCESSREQUESTS, COUNTER, RONLY, radAuthServ, 1, {11}},
	{RADIUSAUTHSERVTOTALBADAUTHENTICATORS, COUNTER, RONLY, radAuthServ, 1, {12}},
	{RADIUSAUTHSERVTOTALPACKETSDROPPED, COUNTER, RONLY, radAuthServ, 1, {13}},
	{RADIUSAUTHSERVTOTALUNKNOWNTYPES, COUNTER, RONLY, radAuthServ, 1, {14}},
	{RADIUSAUTHCLIENTADDRESS, IPADDRESS, RONLY, radAuthEntry, 3, {15,1,2}},
	{RADIUSAUTHCLIENTID, STRING, RONLY, radAuthEntry, 3, {15,1,3}},
	{RADIUSAUTHSERVACCESSREQUESTS, COUNTER, RONLY, radAuthEntry, 3, {15,1,4}},
	{RADIUSAUTHSERVDUPACCESSREQUESTS, COUNTER, RONLY, radAuthEntry, 3, {15,1,5}},
	{RADIUSAUTHSERVACCESSACCEPTS, COUNTER, RONLY, radAuthEntry, 3, {15,1,6}},
	{RADIUSAUTHSERVACCESSREJECTS, COUNTER, RONLY, radAuthEntry, 3, {15,1,7}},
	{RADIUSAUTHSERVACCESSCHALLENGES, COUNTER, RONLY, radAuthEntry, 3, {15,1,8}},
	{RADIUSAUTHSERVMALFORMEDACCESSREQUESTS, COUNTER, RONLY, radAuthEntry, 3, {15,1,9}},
	{RADIUSAUTHSERVBADAUTHENTICATORS, COUNTER, RONLY, radAuthEntry, 3, {15,1,10}},
	{RADIUSAUTHSERVPACKETSDROPPED, COUNTER, RONLY, radAuthEntry, 3, {15,1,11}},
	{RADIUSAUTHSERVUNKNOWNTYPES, COUNTER, RONLY, radAuthEntry, 3, {15,1,12}},
};


static RADCLIENT *
get_client(struct variable *v, oid objid[], size_t *objid_len, int exact) {

	RADCLIENT *c;
	int i, len;

	len = *objid_len - v->namelen;

	if (!mainconfig.clients)
		return NULL;

	if (exact) {
		/* Check the length. */
		if (len != 1)
			return NULL;
		if (objid[v->namelen] == 0)
			return NULL;

		i = objid[v->namelen]-1;
		c = mainconfig.clients;
		while (i && c)
		{
			c = c->next;
			i--;
		}
		if (c)
			return c;
		return NULL;
	}
	i = objid[v->namelen]-1;
	*objid_len = v->namelen + 1;
	if (!len || (objid[v->namelen] == 0)) {
		objid[v->namelen]=1;
		return mainconfig.clients;
	}
	c = mainconfig.clients->next;
	while (i && c) {
		c = c->next;
		i--;
	}
	if (c) {
		objid[v->namelen]++;
		return c;
	} else
		return NULL;
}

static int
radServReset (int action, u_char *var_val, u_char var_val_type,
		size_t var_val_len, const unsigned char *statP, oid *name,
		size_t name_len) {

	long i;
	int big = SNMP_MAX_LEN;

	switch (action) {
		case RESERVE1:
			if (var_val_type != INTEGER)
				return SNMP_ERR_WRONGTYPE;
			if (var_val_len != sizeof (long))
				return SNMP_ERR_WRONGLENGTH;
			if (! asn_parse_int(var_val, &big, &var_val_type, &i, sizeof(long)))
				return SNMP_ERR_WRONGENCODING;
			if (i != 2)
				return SNMP_ERR_WRONGVALUE;
			break;
		case COMMIT:
			need_reload = TRUE;
			break;
		case FREE:
			break;
		default:
			return SNMP_ERR_GENERR;
	}
	return SNMP_ERR_NOERROR;
}

static const unsigned char *
radAccServ(struct variable *vp, oid *name, size_t *length, int exact,
		size_t *var_len, WriteMethod **write_method) {

	static int result;

	/* check whether the instance identifier is valid */
	if (smux_header_generic(vp, name, length, exact, var_len,
		write_method) == MATCH_FAILED) {
		return NULL;
	}

	/* return the current value of the variable */
	switch (vp->magic) {
		case RADIUSACCSERVIDENT:
			*var_len = strlen(rad_snmp.acct.ident);
			return (const unsigned char *) rad_snmp.acct.ident;

		case RADIUSACCSERVUPTIME:
			rad_snmp.acct.uptime = (time(NULL) - rad_snmp.acct.start_time) * 100;
			*var_len = sizeof(int32_t);
			return (unsigned char *) &rad_snmp.acct.uptime;