[mirror_frr.git] / ripd / rip_snmp.c

/* RIP SNMP support
 * Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra 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, or (at your option) any
 * later version.
 *
 * GNU Zebra 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; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <zebra.h>

#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>

#include "if.h"
#include "vrf.h"
#include "log.h"
#include "prefix.h"
#include "command.h"
#include "table.h"
#include "smux.h"
#include "libfrr.h"
#include "version.h"

#include "ripd/ripd.h"

/* RIPv2-MIB. */
#define RIPV2MIB 1,3,6,1,2,1,23

/* RIPv2-MIB rip2Globals values. */
#define RIP2GLOBALROUTECHANGES  1
#define RIP2GLOBALQUERIES       2

/* RIPv2-MIB rip2IfStatEntry. */
#define RIP2IFSTATENTRY         1

/* RIPv2-MIB rip2IfStatTable. */
#define RIP2IFSTATADDRESS       1
#define RIP2IFSTATRCVBADPACKETS 2
#define RIP2IFSTATRCVBADROUTES  3
#define RIP2IFSTATSENTUPDATES   4
#define RIP2IFSTATSTATUS        5

/* RIPv2-MIB rip2IfConfTable. */
#define RIP2IFCONFADDRESS       1
#define RIP2IFCONFDOMAIN        2
#define RIP2IFCONFAUTHTYPE      3
#define RIP2IFCONFAUTHKEY       4
#define RIP2IFCONFSEND          5
#define RIP2IFCONFRECEIVE       6
#define RIP2IFCONFDEFAULTMETRIC 7
#define RIP2IFCONFSTATUS        8
#define RIP2IFCONFSRCADDRESS    9

/* RIPv2-MIB rip2PeerTable. */
#define RIP2PEERADDRESS         1
#define RIP2PEERDOMAIN          2
#define RIP2PEERLASTUPDATE      3
#define RIP2PEERVERSION         4
#define RIP2PEERRCVBADPACKETS   5
#define RIP2PEERRCVBADROUTES    6

/* SNMP value hack. */
#define COUNTER     ASN_COUNTER
#define INTEGER     ASN_INTEGER
#define TIMETICKS   ASN_TIMETICKS
#define IPADDRESS   ASN_IPADDRESS
#define STRING      ASN_OCTET_STR

/* Define SNMP local variables. */
SNMP_LOCAL_VARIABLES

/* RIP-MIB instances. */
static oid rip_oid[] = {RIPV2MIB};

/* Interface cache table sorted by interface's address. */
static struct route_table *rip_ifaddr_table;

/* Hook functions. */
static uint8_t *rip2Globals(struct variable *, oid[], size_t *, int, size_t *,
			    WriteMethod **);
static uint8_t *rip2IfStatEntry(struct variable *, oid[], size_t *, int,
				size_t *, WriteMethod **);
static uint8_t *rip2IfConfAddress(struct variable *, oid[], size_t *, int,
				  size_t *, WriteMethod **);
static uint8_t *rip2PeerTable(struct variable *, oid[], size_t *, int, size_t *,
			      WriteMethod **);

static struct variable rip_variables[] = {
	/* RIP Global Counters. */
	{RIP2GLOBALROUTECHANGES, COUNTER, RONLY, rip2Globals, 2, {1, 1}},
	{RIP2GLOBALQUERIES, COUNTER, RONLY, rip2Globals, 2, {1, 2}},
	/* RIP Interface Tables. */
	{RIP2IFSTATADDRESS, IPADDRESS, RONLY, rip2IfStatEntry, 3, {2, 1, 1}},
	{RIP2IFSTATRCVBADPACKETS,
	 COUNTER,
	 RONLY,
	 rip2IfStatEntry,
	 3,
	 {2, 1, 2}},
	{RIP2IFSTATRCVBADROUTES, COUNTER, RONLY, rip2IfStatEntry, 3, {2, 1, 3}},
	{RIP2IFSTATSENTUPDATES, COUNTER, RONLY, rip2IfStatEntry, 3, {2, 1, 4}},
	{RIP2IFSTATSTATUS, COUNTER, RWRITE, rip2IfStatEntry, 3, {2, 1, 5}},
	{RIP2IFCONFADDRESS,
	 IPADDRESS,
	 RONLY,
	 rip2IfConfAddress,
	 /* RIP Interface Configuration Table. */
	 3,
	 {3, 1, 1}},
	{RIP2IFCONFDOMAIN, STRING, RONLY, rip2IfConfAddress, 3, {3, 1, 2}},
	{RIP2IFCONFAUTHTYPE, COUNTER, RONLY, rip2IfConfAddress, 3, {3, 1, 3}},
	{RIP2IFCONFAUTHKEY, STRING, RONLY, rip2IfConfAddress, 3, {3, 1, 4}},
	{RIP2IFCONFSEND, COUNTER, RONLY, rip2IfConfAddress, 3, {3, 1, 5}},
	{RIP2IFCONFRECEIVE, COUNTER, RONLY, rip2IfConfAddress, 3, {3, 1, 6}},
	{RIP2IFCONFDEFAULTMETRIC,
	 COUNTER,
	 RONLY,
	 rip2IfConfAddress,
	 3,
	 {3, 1, 7}},
	{RIP2IFCONFSTATUS, COUNTER, RONLY, rip2IfConfAddress, 3, {3, 1, 8}},
	{RIP2IFCONFSRCADDRESS,
	 IPADDRESS,
	 RONLY,
	 rip2IfConfAddress,
	 3,
	 {3, 1, 9}},
	{RIP2PEERADDRESS,
	 IPADDRESS,
	 RONLY,
	 rip2PeerTable,
	 /* RIP Peer Table. */
	 3,
	 {4, 1, 1}},
	{RIP2PEERDOMAIN, STRING, RONLY, rip2PeerTable, 3, {4, 1, 2}},
	{RIP2PEERLASTUPDATE, TIMETICKS, RONLY, rip2PeerTable, 3, {4, 1, 3}},
	{RIP2PEERVERSION, INTEGER, RONLY, rip2PeerTable, 3, {4, 1, 4}},
	{RIP2PEERRCVBADPACKETS, COUNTER, RONLY, rip2PeerTable, 3, {4, 1, 5}},
	{RIP2PEERRCVBADROUTES, COUNTER, RONLY, rip2PeerTable, 3, {4, 1, 6}}};

extern struct thread_master *master;

static uint8_t *rip2Globals(struct variable *v, oid name[], size_t *length,
			    int exact, size_t *var_len,
			    WriteMethod **write_method)
{
	if (smux_header_generic(v, name, length, exact, var_len, write_method)
	    == MATCH_FAILED)
		return NULL;

	/* Retrun global counter. */
	switch (v->magic) {
	case RIP2GLOBALROUTECHANGES:
		return SNMP_INTEGER(rip_global_route_changes);
		break;
	case RIP2GLOBALQUERIES:
		return SNMP_INTEGER(rip_global_queries);
		break;
	default:
		return NULL;
		break;
	}
	return NULL;
}

static int rip_snmp_ifaddr_add(struct connected *ifc)
{
	struct interface *ifp = ifc->ifp;
	struct prefix *p;
	struct route_node *rn;

	p = ifc->address;

	if (p->family != AF_INET)
		return 0;

	rn = route_node_get(rip_ifaddr_table, p);
	rn->info = ifp;
	return 0;
}

static int rip_snmp_ifaddr_del(struct connected *ifc)
{
	struct interface *ifp = ifc->ifp;
	struct prefix *p;
	struct route_node *rn;
	struct interface *i;

	p = ifc->address;

	if (p->family != AF_INET)
		return 0;

	rn = route_node_lookup(rip_ifaddr_table, p);
	if (!rn)
		return 0;
	i = rn->info;
	if (!strncmp(i->name, ifp->name, INTERFACE_NAMSIZ)) {
		rn->info = NULL;
		route_unlock_node(rn);
		route_unlock_node(rn);
	}
	return 0;
}

static struct interface *rip_ifaddr_lookup_next(struct in_addr *addr)
{
	struct prefix_ipv4 p;
	struct route_node *rn;
	struct interface *ifp;

	p.family = AF_INET;
	p.prefixlen = IPV4_MAX_BITLEN;
	p.prefix = *addr;

	rn = route_node_get(rip_ifaddr_table, (struct prefix *)&p);

	for (rn = route_next(rn); rn; rn = route_next(rn))
		if (rn->info)
			break;

	if (rn && rn->info) {
		ifp = rn->info;
		*addr = rn->p.u.prefix4;
		route_unlock_node(rn);
		return ifp;
	}
	return NULL;
}

static struct interface *rip2IfLookup(struct variable *v, oid name[],
				      size_t *length, struct in_addr *addr,
				      int exact)
{
	int len;
	struct interface *ifp;

	if (exact) {
		/* Check the length. */
		if (*length - v->namelen != sizeof(struct in_addr))
			return NULL;

		oid2in_addr(name + v->namelen, sizeof(struct in_addr), addr);

		return if_lookup_exact_address((void *)addr, AF_INET,
					       VRF_DEFAULT);
	} else {
		len = *length - v->namelen;
		if (len > 4)
			len = 4;

		oid2in_addr(name + v->namelen, len, addr);

		ifp = rip_ifaddr_lookup_next(addr);

		if (ifp == NULL)
			return NULL;

		oid_copy_addr(name + v->namelen, addr, sizeof(struct in_addr));

		*length = v->namelen + sizeof(struct in_addr);

		return ifp;
	}
	return NULL;
}

static struct rip_peer *rip2PeerLookup(struct variable *v, oid name[],
				       size_t *length, struct in_addr *addr,
				       int exact)
{
	int len;
	struct rip_peer *peer;

	if (exact) {
		/* Check the length. */
		if (*length - v->namelen != sizeof(struct in_addr) + 1)
			return NULL;

		oid2in_addr(name + v->namelen, sizeof(struct in_addr), addr);

		peer = rip_peer_lookup(addr);

		if (peer->domain
		    == (int)name[v->namelen + sizeof(struct in_addr)])
			return peer;

		return NULL;
	} else {
		len = *length - v->namelen;
		if (len > 4)
			len = 4;

		oid2in_addr(name + v->namelen, len, addr);

		len = *length - v->namelen;
		peer = rip_peer_lookup(addr);
		if (peer) {
			if ((len < (int)sizeof(struct in_addr) + 1)
			    || (peer->domain
				> (int)name[v->namelen
					    + sizeof(struct in_addr)])) {
				oid_copy_addr(name + v->namelen, &peer->addr,
					      sizeof(struct in_addr));
				name[v->namelen + sizeof(struct in_addr)] =
					peer->domain;
				*length =
					sizeof(struct in_addr) + v->namelen + 1;
				return peer;
			}
		}
		peer = rip_peer_lookup_next(addr);

		if (!peer)
			return NULL;

		oid_copy_addr(name + v->namelen, &peer->addr,
			      sizeof(struct in_addr));
		name[v->namelen + sizeof(struct in_addr)] = peer->domain;
		*length = sizeof(struct in_addr) + v->namelen + 1;

		return peer;
	}
	return NULL;
}

static uint8_t *rip2IfStatEntry(struct variable *v, oid name[], size_t *length,
				int exact, size_t *var_len,
				WriteMethod **write_method)
{
	struct interface *ifp;
	struct rip_interface *ri;
	static struct in_addr addr;
	static long valid = SNMP_VALID;

	if (smux_header_table(v, name, length, exact, var_len, write_method)
	    == MATCH_FAILED)
		return NULL;

	memset(&addr, 0, sizeof(struct in_addr));

	/* Lookup interface. */
	ifp = rip2IfLookup(v, name, length, &addr, exact);
	if (!ifp)
		return NULL;

	/* Fetch rip_interface information. */
	ri = ifp->info;

	switch (v->magic) {
	case RIP2IFSTATADDRESS:
		return SNMP_IPADDRESS(addr);
		break;
	case RIP2IFSTATRCVBADPACKETS:
		*var_len = sizeof(long);
		return (uint8_t *)&ri->recv_badpackets;

	case RIP2IFSTATRCVBADROUTES:
		*var_len = sizeof(long);
		return (uint8_t *)&ri->recv_badroutes;

	case RIP2IFSTATSENTUPDATES:
		*var_len = sizeof(long);
		return (uint8_t *)&ri->sent_updates;

	case RIP2IFSTATSTATUS:
		*var_len = sizeof(long);
		v->type = ASN_INTEGER;
		return (uint8_t *)&valid;

	default:
		return NULL;
	}
	return NULL;
}

static long rip2IfConfSend(struct rip_interface *ri)
{
#define doNotSend       1
#define ripVersion1     2
#define rip1Compatible  3
#define ripVersion2     4
#define ripV1Demand     5
#define ripV2Demand     6

	if (!ri->running)
		return doNotSend;

	if (ri->ri_send & RIPv2)
		return ripVersion2;
	else if (ri->ri_send & RIPv1)
		return ripVersion1;
	else if (rip) {
		if (rip->version_send == RIPv2)
			return ripVersion2;
		else if (rip->version_send == RIPv1)
			return ripVersion1;
	}
	return doNotSend;
}

static long rip2IfConfReceive(struct rip_interface *ri)
{
#define rip1            1
#define rip2            2
#define rip1OrRip2      3
#define doNotReceive    4

	int recvv;

	if (!ri->running)
		return doNotReceive;

	recvv = (ri->ri_receive == RI_RIP_UNSPEC) ? rip->version_recv
						  : ri->ri_receive;
	if (recvv == RI_RIP_VERSION_1_AND_2)
		return rip1OrRip2;
	else if (recvv & RIPv2)
		return rip2;
	else if (recvv & RIPv1)
		return rip1;
	else
		return doNotReceive;
}

static uint8_t *rip2IfConfAddress(struct variable *v, oid name[],
				  size_t *length, int exact, size_t *val_len,
				  WriteMethod **write_method)
{
	static struct in_addr addr;
	static long valid = SNMP_INVALID;
	static long domain = 0;
	static long config = 0;
	static unsigned int auth = 0;
	struct interface *ifp;
	struct rip_interface *ri;

	if (smux_header_table(v, name, length, exact, val_len, write_method)
	    == MATCH_FAILED)
		return NULL;

	memset(&addr, 0, sizeof(struct in_addr));

	/* Lookup interface. */
	ifp = rip2IfLookup(v, name, length, &addr, exact);
	if (!ifp)
		return NULL;

	/* Fetch rip_interface information. */
	ri = ifp->info;

	switch (v->magic) {
	case RIP2IFCONFADDRESS:
		*val_len = sizeof(struct in_addr);
		return (uint8_t *)&addr;

	case RIP2IFCONFDOMAIN:
		*val_len = 2;
		return (uint8_t *)&domain;

	case RIP2IFCONFAUTHTYPE:
		auth = ri->auth_type;
		*val_len = sizeof(long);
		v->type = ASN_INTEGER;
		return (uint8_t *)&auth;

	case RIP2IFCONFAUTHKEY:
		*val_len = 0;
		return (uint8_t *)&domain;
	case RIP2IFCONFSEND:
		config = rip2IfConfSend(ri);
		*val_len = sizeof(long);
		v->type = ASN_INTEGER;
		return (uint8_t *)&config;
	case RIP2IFCONFRECEIVE:
		config = rip2IfConfReceive(ri);
		*val_len = sizeof(long);
		v->type = ASN_INTEGER;
		return (uint8_t *)&config;

	case RIP2IFCONFDEFAULTMETRIC:
		*val_len = sizeof(long);
		v->type = ASN_INTEGER;
		return (uint8_t *)&ifp->metric;
	case RIP2IFCONFSTATUS:
		*val_len = sizeof(long);
		v->type = ASN_INTEGER;
		return (uint8_t *)&valid;
	case RIP2IFCONFSRCADDRESS:
		*val_len = sizeof(struct in_addr);
		return (uint8_t *)&addr;

	default:
		return NULL;
	}
	return NULL;
}

static uint8_t *rip2PeerTable(struct variable *v, oid name[], size_t *length,
			      int exact, size_t *val_len,
			      WriteMethod **write_method)
{
	static struct in_addr addr;
	static int domain = 0;
	static int version;
	/* static time_t uptime; */

	struct rip_peer *peer;

	if (smux_header_table(v, name, length, exact, val_len, write_method)
	    == MATCH_FAILED)
		return NULL;

	memset(&addr, 0, sizeof(struct in_addr));

	/* Lookup interface. */
	peer = rip2PeerLookup(v, name, length, &addr, exact);
	if (!peer)
		return NULL;

	switch (v->magic) {
	case RIP2PEERADDRESS:
		*val_len = sizeof(struct in_addr);
		return (uint8_t *)&peer->addr;

	case RIP2PEERDOMAIN:
		*val_len = 2;
		return (uint8_t *)&domain;

	case RIP2PEERLASTUPDATE:
#if 0 
      /* We don't know the SNMP agent startup time. We have two choices here:
       * - assume ripd startup time equals SNMP agent startup time
       * - don't support this variable, at all
       * Currently, we do the latter...
       */
      *val_len = sizeof (time_t);
      uptime = peer->uptime; /* now - snmp_agent_startup - peer->uptime */
      return (uint8_t *) &uptime;
#else
		return (uint8_t *)NULL;
#endif

	case RIP2PEERVERSION:
		*val_len = sizeof(int);
		version = peer->version;
		return (uint8_t *)&version;

	case RIP2PEERRCVBADPACKETS:
		*val_len = sizeof(int);
		return (uint8_t *)&peer->recv_badpackets;

	case RIP2PEERRCVBADROUTES:
		*val_len = sizeof(int);
		return (uint8_t *)&peer->recv_badroutes;

	default:
		return NULL;
	}
	return NULL;
}

/* Register RIPv2-MIB. */
static int rip_snmp_init(struct thread_master *master)
{
	rip_ifaddr_table = route_table_init();

	smux_init(master);
	REGISTER_MIB("mibII/rip", rip_variables, variable, rip_oid);
	return 0;
}

static int rip_snmp_module_init(void)
{
	hook_register(rip_ifaddr_add, rip_snmp_ifaddr_add);
	hook_register(rip_ifaddr_del, rip_snmp_ifaddr_del);

	hook_register(frr_late_init, rip_snmp_init);
	return 0;
}

FRR_MODULE_SETUP(.name = "ripd_snmp", .version = FRR_VERSION,
		 .description = "ripd AgentX SNMP module",
		 .init = rip_snmp_module_init, )
Commit	Line	Data
718e3744	1	/* RIP SNMP support
	2	* Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
	3	*
	4	* This file is part of GNU Zebra.
	5	*
	6	* GNU Zebra is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* GNU Zebra is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
896014f4 DL	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; see the file COPYING; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
718e3744	19	*/
	20
	21	#include <zebra.h>
	22
07661cb5	23	#include <net-snmp/net-snmp-config.h>
fb62a3ce	24	#include <net-snmp/net-snmp-includes.h>
718e3744	25
718e3744	26	#include "if.h"
d6b1bfba	27	#include "vrf.h"
718e3744	28	#include "log.h"
	29	#include "prefix.h"
	30	#include "command.h"
	31	#include "table.h"
	32	#include "smux.h"
5986b66b DL	33	#include "libfrr.h"
5986b66b DL	34	#include "version.h"
718e3744	35
718e3744	36	#include "ripd/ripd.h"
6b0655a2	37
718e3744	38	/* RIPv2-MIB. */
	39	#define RIPV2MIB 1,3,6,1,2,1,23
	40
718e3744	41	/* RIPv2-MIB rip2Globals values. */
	42	#define RIP2GLOBALROUTECHANGES 1
	43	#define RIP2GLOBALQUERIES 2
	44
	45	/* RIPv2-MIB rip2IfStatEntry. */
	46	#define RIP2IFSTATENTRY 1
	47
	48	/* RIPv2-MIB rip2IfStatTable. */
	49	#define RIP2IFSTATADDRESS 1
	50	#define RIP2IFSTATRCVBADPACKETS 2
	51	#define RIP2IFSTATRCVBADROUTES 3
	52	#define RIP2IFSTATSENTUPDATES 4
	53	#define RIP2IFSTATSTATUS 5
	54
	55	/* RIPv2-MIB rip2IfConfTable. */
	56	#define RIP2IFCONFADDRESS 1
	57	#define RIP2IFCONFDOMAIN 2
	58	#define RIP2IFCONFAUTHTYPE 3
	59	#define RIP2IFCONFAUTHKEY 4
	60	#define RIP2IFCONFSEND 5
	61	#define RIP2IFCONFRECEIVE 6
	62	#define RIP2IFCONFDEFAULTMETRIC 7
	63	#define RIP2IFCONFSTATUS 8
	64	#define RIP2IFCONFSRCADDRESS 9
	65
	66	/* RIPv2-MIB rip2PeerTable. */
	67	#define RIP2PEERADDRESS 1
	68	#define RIP2PEERDOMAIN 2
	69	#define RIP2PEERLASTUPDATE 3
	70	#define RIP2PEERVERSION 4
	71	#define RIP2PEERRCVBADPACKETS 5
	72	#define RIP2PEERRCVBADROUTES 6
	73
	74	/* SNMP value hack. */
	75	#define COUNTER ASN_COUNTER
	76	#define INTEGER ASN_INTEGER
	77	#define TIMETICKS ASN_TIMETICKS
	78	#define IPADDRESS ASN_IPADDRESS
	79	#define STRING ASN_OCTET_STR
6b0655a2	80
718e3744	81	/* Define SNMP local variables. */
	82	SNMP_LOCAL_VARIABLES
	83
	84	/* RIP-MIB instances. */
d62a17ae	85	static oid rip_oid[] = {RIPV2MIB};
718e3744	86
718e3744	87	/* Interface cache table sorted by interface's address. */
1c6f50bf	88	static struct route_table *rip_ifaddr_table;
718e3744	89
718e3744	90	/* Hook functions. */
d7c0a89a QY	91	static uint8_t rip2Globals(struct variable , oid[], size_t , int, size_t ,
	92	WriteMethod **);
	93	static uint8_t rip2IfStatEntry(struct variable , oid[], size_t *, int,
	94	size_t , WriteMethod *);
	95	static uint8_t rip2IfConfAddress(struct variable , oid[], size_t *, int,
	96	size_t , WriteMethod *);
	97	static uint8_t rip2PeerTable(struct variable , oid[], size_t , int, size_t ,
	98	WriteMethod **);
d62a17ae	99
	100	static struct variable rip_variables[] = {
	101	/* RIP Global Counters. */
	102	{RIP2GLOBALROUTECHANGES, COUNTER, RONLY, rip2Globals, 2, {1, 1}},
	103	{RIP2GLOBALQUERIES, COUNTER, RONLY, rip2Globals, 2, {1, 2}},
	104	/* RIP Interface Tables. */
	105	{RIP2IFSTATADDRESS, IPADDRESS, RONLY, rip2IfStatEntry, 3, {2, 1, 1}},
	106	{RIP2IFSTATRCVBADPACKETS,
	107	COUNTER,
	108	RONLY,
	109	rip2IfStatEntry,
	110	3,
	111	{2, 1, 2}},
	112	{RIP2IFSTATRCVBADROUTES, COUNTER, RONLY, rip2IfStatEntry, 3, {2, 1, 3}},
	113	{RIP2IFSTATSENTUPDATES, COUNTER, RONLY, rip2IfStatEntry, 3, {2, 1, 4}},
	114	{RIP2IFSTATSTATUS, COUNTER, RWRITE, rip2IfStatEntry, 3, {2, 1, 5}},
	115	{RIP2IFCONFADDRESS,
	116	IPADDRESS,
	117	RONLY,
	118	rip2IfConfAddress,
	119	/* RIP Interface Configuration Table. */
	120	3,
	121	{3, 1, 1}},
	122	{RIP2IFCONFDOMAIN, STRING, RONLY, rip2IfConfAddress, 3, {3, 1, 2}},
	123	{RIP2IFCONFAUTHTYPE, COUNTER, RONLY, rip2IfConfAddress, 3, {3, 1, 3}},
	124	{RIP2IFCONFAUTHKEY, STRING, RONLY, rip2IfConfAddress, 3, {3, 1, 4}},
	125	{RIP2IFCONFSEND, COUNTER, RONLY, rip2IfConfAddress, 3, {3, 1, 5}},
	126	{RIP2IFCONFRECEIVE, COUNTER, RONLY, rip2IfConfAddress, 3, {3, 1, 6}},
	127	{RIP2IFCONFDEFAULTMETRIC,
	128	COUNTER,
	129	RONLY,
	130	rip2IfConfAddress,
	131	3,
	132	{3, 1, 7}},
	133	{RIP2IFCONFSTATUS, COUNTER, RONLY, rip2IfConfAddress, 3, {3, 1, 8}},
	134	{RIP2IFCONFSRCADDRESS,
	135	IPADDRESS,
	136	RONLY,
	137	rip2IfConfAddress,
	138	3,
	139	{3, 1, 9}},
	140	{RIP2PEERADDRESS,
	141	IPADDRESS,
	142	RONLY,
	143	rip2PeerTable,
	144	/* RIP Peer Table. */
	145	3,
	146	{4, 1, 1}},
	147	{RIP2PEERDOMAIN, STRING, RONLY, rip2PeerTable, 3, {4, 1, 2}},
	148	{RIP2PEERLASTUPDATE, TIMETICKS, RONLY, rip2PeerTable, 3, {4, 1, 3}},
	149	{RIP2PEERVERSION, INTEGER, RONLY, rip2PeerTable, 3, {4, 1, 4}},
	150	{RIP2PEERRCVBADPACKETS, COUNTER, RONLY, rip2PeerTable, 3, {4, 1, 5}},
	151	{RIP2PEERRCVBADROUTES, COUNTER, RONLY, rip2PeerTable, 3, {4, 1, 6}}};
dd488a78	152
dd488a78	153	extern struct thread_master *master;
6b0655a2	154
d7c0a89a QY	155	static uint8_t rip2Globals(struct variable v, oid name[], size_t *length,
	156	int exact, size_t *var_len,
	157	WriteMethod **write_method)
718e3744	158	{
d62a17ae	159	if (smux_header_generic(v, name, length, exact, var_len, write_method)
	160	== MATCH_FAILED)
	161	return NULL;
	162
	163	/* Retrun global counter. */
	164	switch (v->magic) {
	165	case RIP2GLOBALROUTECHANGES:
	166	return SNMP_INTEGER(rip_global_route_changes);
	167	break;
	168	case RIP2GLOBALQUERIES:
	169	return SNMP_INTEGER(rip_global_queries);
	170	break;
	171	default:
	172	return NULL;
	173	break;
	174	}
	175	return NULL;
718e3744	176	}
718e3744	177
d62a17ae	178	static int rip_snmp_ifaddr_add(struct connected *ifc)
718e3744	179	{
d62a17ae	180	struct interface *ifp = ifc->ifp;
	181	struct prefix *p;
	182	struct route_node *rn;
718e3744	183
d62a17ae	184	p = ifc->address;
718e3744	185
d62a17ae	186	if (p->family != AF_INET)
d62a17ae	187	return 0;
718e3744	188
d62a17ae	189	rn = route_node_get(rip_ifaddr_table, p);
	190	rn->info = ifp;
	191	return 0;
718e3744	192	}
718e3744	193
d62a17ae	194	static int rip_snmp_ifaddr_del(struct connected *ifc)
718e3744	195	{
d62a17ae	196	struct interface *ifp = ifc->ifp;
	197	struct prefix *p;
	198	struct route_node *rn;
	199	struct interface *i;
	200
	201	p = ifc->address;
	202
	203	if (p->family != AF_INET)
	204	return 0;
	205
	206	rn = route_node_lookup(rip_ifaddr_table, p);
	207	if (!rn)
	208	return 0;
	209	i = rn->info;
47e5a60f	210	if (!strncmp(i->name, ifp->name, INTERFACE_NAMSIZ)) {
d62a17ae	211	rn->info = NULL;
	212	route_unlock_node(rn);
	213	route_unlock_node(rn);
	214	}
	215	return 0;
718e3744	216	}
718e3744	217
d62a17ae	218	static struct interface rip_ifaddr_lookup_next(struct in_addr addr)
718e3744	219	{
d62a17ae	220	struct prefix_ipv4 p;
	221	struct route_node *rn;
	222	struct interface *ifp;
	223
	224	p.family = AF_INET;
	225	p.prefixlen = IPV4_MAX_BITLEN;
	226	p.prefix = *addr;
	227
	228	rn = route_node_get(rip_ifaddr_table, (struct prefix *)&p);
	229
	230	for (rn = route_next(rn); rn; rn = route_next(rn))
	231	if (rn->info)
	232	break;
	233
	234	if (rn && rn->info) {
	235	ifp = rn->info;
	236	*addr = rn->p.u.prefix4;
	237	route_unlock_node(rn);
	238	return ifp;
	239	}
	240	return NULL;
718e3744	241	}
718e3744	242
d62a17ae	243	static struct interface rip2IfLookup(struct variable v, oid name[],
	244	size_t length, struct in_addr addr,
	245	int exact)
718e3744	246	{
d62a17ae	247	int len;
d62a17ae	248	struct interface *ifp;
718e3744	249
d62a17ae	250	if (exact) {
	251	/* Check the length. */
	252	if (*length - v->namelen != sizeof(struct in_addr))
	253	return NULL;
718e3744	254
d62a17ae	255	oid2in_addr(name + v->namelen, sizeof(struct in_addr), addr);
718e3744	256
d62a17ae	257	return if_lookup_exact_address((void *)addr, AF_INET,
	258	VRF_DEFAULT);
	259	} else {
	260	len = *length - v->namelen;
	261	if (len > 4)
	262	len = 4;
718e3744	263
d62a17ae	264	oid2in_addr(name + v->namelen, len, addr);
718e3744	265
d62a17ae	266	ifp = rip_ifaddr_lookup_next(addr);
718e3744	267
d62a17ae	268	if (ifp == NULL)
d62a17ae	269	return NULL;
718e3744	270
d62a17ae	271	oid_copy_addr(name + v->namelen, addr, sizeof(struct in_addr));
718e3744	272
d62a17ae	273	*length = v->namelen + sizeof(struct in_addr);
718e3744	274
d62a17ae	275	return ifp;
d62a17ae	276	}
718e3744	277	return NULL;
d62a17ae	278	}
718e3744	279
d62a17ae	280	static struct rip_peer rip2PeerLookup(struct variable v, oid name[],
	281	size_t length, struct in_addr addr,
	282	int exact)
	283	{
	284	int len;
	285	struct rip_peer *peer;
	286
	287	if (exact) {
	288	/* Check the length. */
	289	if (*length - v->namelen != sizeof(struct in_addr) + 1)
	290	return NULL;
	291
	292	oid2in_addr(name + v->namelen, sizeof(struct in_addr), addr);
	293
	294	peer = rip_peer_lookup(addr);
	295
	296	if (peer->domain
	297	== (int)name[v->namelen + sizeof(struct in_addr)])
	298	return peer;
	299
	300	return NULL;
	301	} else {
	302	len = *length - v->namelen;
	303	if (len > 4)
	304	len = 4;
	305
	306	oid2in_addr(name + v->namelen, len, addr);
	307
	308	len = *length - v->namelen;
	309	peer = rip_peer_lookup(addr);
	310	if (peer) {
	311	if ((len < (int)sizeof(struct in_addr) + 1)
	312	\|\| (peer->domain
	313	> (int)name[v->namelen
	314	+ sizeof(struct in_addr)])) {
	315	oid_copy_addr(name + v->namelen, &peer->addr,
	316	sizeof(struct in_addr));
	317	name[v->namelen + sizeof(struct in_addr)] =
	318	peer->domain;
	319	*length =
	320	sizeof(struct in_addr) + v->namelen + 1;
	321	return peer;
	322	}
	323	}
	324	peer = rip_peer_lookup_next(addr);
	325
	326	if (!peer)
	327	return NULL;
	328
	329	oid_copy_addr(name + v->namelen, &peer->addr,
	330	sizeof(struct in_addr));
	331	name[v->namelen + sizeof(struct in_addr)] = peer->domain;
	332	*length = sizeof(struct in_addr) + v->namelen + 1;
	333
	334	return peer;
	335	}
718e3744	336	return NULL;
718e3744	337	}
718e3744	338
d7c0a89a QY	339	static uint8_t rip2IfStatEntry(struct variable v, oid name[], size_t *length,
	340	int exact, size_t *var_len,
	341	WriteMethod **write_method)
718e3744	342	{
d62a17ae	343	struct interface *ifp;
	344	struct rip_interface *ri;
	345	static struct in_addr addr;
	346	static long valid = SNMP_VALID;
	347
	348	if (smux_header_table(v, name, length, exact, var_len, write_method)
	349	== MATCH_FAILED)
	350	return NULL;
	351
	352	memset(&addr, 0, sizeof(struct in_addr));
	353
	354	/* Lookup interface. */
	355	ifp = rip2IfLookup(v, name, length, &addr, exact);
	356	if (!ifp)
	357	return NULL;
	358
	359	/* Fetch rip_interface information. */
	360	ri = ifp->info;
	361
	362	switch (v->magic) {
	363	case RIP2IFSTATADDRESS:
	364	return SNMP_IPADDRESS(addr);
	365	break;
	366	case RIP2IFSTATRCVBADPACKETS:
	367	*var_len = sizeof(long);
d7c0a89a	368	return (uint8_t *)&ri->recv_badpackets;
d62a17ae	369
	370	case RIP2IFSTATRCVBADROUTES:
	371	*var_len = sizeof(long);
d7c0a89a	372	return (uint8_t *)&ri->recv_badroutes;
d62a17ae	373
	374	case RIP2IFSTATSENTUPDATES:
	375	*var_len = sizeof(long);
d7c0a89a	376	return (uint8_t *)&ri->sent_updates;
d62a17ae	377
	378	case RIP2IFSTATSTATUS:
	379	*var_len = sizeof(long);
	380	v->type = ASN_INTEGER;
d7c0a89a	381	return (uint8_t *)&valid;
d62a17ae	382
	383	default:
	384	return NULL;
	385	}
	386	return NULL;
718e3744	387	}
718e3744	388
d62a17ae	389	static long rip2IfConfSend(struct rip_interface *ri)
718e3744	390	{
	391	#define doNotSend 1
	392	#define ripVersion1 2
	393	#define rip1Compatible 3
	394	#define ripVersion2 4
	395	#define ripV1Demand 5
	396	#define ripV2Demand 6
	397
d62a17ae	398	if (!ri->running)
	399	return doNotSend;
	400
	401	if (ri->ri_send & RIPv2)
	402	return ripVersion2;
	403	else if (ri->ri_send & RIPv1)
	404	return ripVersion1;
	405	else if (rip) {
	406	if (rip->version_send == RIPv2)
	407	return ripVersion2;
	408	else if (rip->version_send == RIPv1)
	409	return ripVersion1;
	410	}
	411	return doNotSend;
718e3744	412	}
718e3744	413
d62a17ae	414	static long rip2IfConfReceive(struct rip_interface *ri)
718e3744	415	{
	416	#define rip1 1
	417	#define rip2 2
	418	#define rip1OrRip2 3
	419	#define doNotReceive 4
	420
d62a17ae	421	int recvv;
	422
	423	if (!ri->running)
	424	return doNotReceive;
	425
	426	recvv = (ri->ri_receive == RI_RIP_UNSPEC) ? rip->version_recv
	427	: ri->ri_receive;
	428	if (recvv == RI_RIP_VERSION_1_AND_2)
	429	return rip1OrRip2;
	430	else if (recvv & RIPv2)
	431	return rip2;
	432	else if (recvv & RIPv1)
	433	return rip1;
	434	else
	435	return doNotReceive;
718e3744	436	}
718e3744	437
d7c0a89a QY	438	static uint8_t rip2IfConfAddress(struct variable v, oid name[],
	439	size_t length, int exact, size_t val_len,
	440	WriteMethod **write_method)
718e3744	441	{
d62a17ae	442	static struct in_addr addr;
	443	static long valid = SNMP_INVALID;
	444	static long domain = 0;
	445	static long config = 0;
d7c0a89a	446	static unsigned int auth = 0;
d62a17ae	447	struct interface *ifp;
	448	struct rip_interface *ri;
	449
	450	if (smux_header_table(v, name, length, exact, val_len, write_method)
	451	== MATCH_FAILED)
	452	return NULL;
	453
	454	memset(&addr, 0, sizeof(struct in_addr));
	455
	456	/* Lookup interface. */
	457	ifp = rip2IfLookup(v, name, length, &addr, exact);
	458	if (!ifp)
	459	return NULL;
	460
	461	/* Fetch rip_interface information. */
	462	ri = ifp->info;
	463
	464	switch (v->magic) {
	465	case RIP2IFCONFADDRESS:
	466	*val_len = sizeof(struct in_addr);
d7c0a89a	467	return (uint8_t *)&addr;
d62a17ae	468
	469	case RIP2IFCONFDOMAIN:
	470	*val_len = 2;
d7c0a89a	471	return (uint8_t *)&domain;
d62a17ae	472
	473	case RIP2IFCONFAUTHTYPE:
	474	auth = ri->auth_type;
	475	*val_len = sizeof(long);
	476	v->type = ASN_INTEGER;
d7c0a89a	477	return (uint8_t *)&auth;
d62a17ae	478
	479	case RIP2IFCONFAUTHKEY:
	480	*val_len = 0;
d7c0a89a	481	return (uint8_t *)&domain;
d62a17ae	482	case RIP2IFCONFSEND:
	483	config = rip2IfConfSend(ri);
	484	*val_len = sizeof(long);
	485	v->type = ASN_INTEGER;
d7c0a89a	486	return (uint8_t *)&config;
d62a17ae	487	case RIP2IFCONFRECEIVE:
	488	config = rip2IfConfReceive(ri);
	489	*val_len = sizeof(long);
	490	v->type = ASN_INTEGER;
d7c0a89a	491	return (uint8_t *)&config;
d62a17ae	492
	493	case RIP2IFCONFDEFAULTMETRIC:
	494	*val_len = sizeof(long);
	495	v->type = ASN_INTEGER;
d7c0a89a	496	return (uint8_t *)&ifp->metric;
d62a17ae	497	case RIP2IFCONFSTATUS:
	498	*val_len = sizeof(long);
	499	v->type = ASN_INTEGER;
d7c0a89a	500	return (uint8_t *)&valid;
d62a17ae	501	case RIP2IFCONFSRCADDRESS:
d62a17ae	502	*val_len = sizeof(struct in_addr);
d7c0a89a	503	return (uint8_t *)&addr;
d62a17ae	504
	505	default:
	506	return NULL;
	507	}
	508	return NULL;
718e3744	509	}
718e3744	510
d7c0a89a QY	511	static uint8_t rip2PeerTable(struct variable v, oid name[], size_t *length,
	512	int exact, size_t *val_len,
	513	WriteMethod **write_method)
718e3744	514	{
d62a17ae	515	static struct in_addr addr;
	516	static int domain = 0;
	517	static int version;
	518	/* static time_t uptime; */
	519
	520	struct rip_peer *peer;
	521
	522	if (smux_header_table(v, name, length, exact, val_len, write_method)
	523	== MATCH_FAILED)
	524	return NULL;
	525
	526	memset(&addr, 0, sizeof(struct in_addr));
	527
	528	/* Lookup interface. */
	529	peer = rip2PeerLookup(v, name, length, &addr, exact);
	530	if (!peer)
	531	return NULL;
	532
	533	switch (v->magic) {
	534	case RIP2PEERADDRESS:
	535	*val_len = sizeof(struct in_addr);
d7c0a89a	536	return (uint8_t *)&peer->addr;
d62a17ae	537
	538	case RIP2PEERDOMAIN:
	539	*val_len = 2;
d7c0a89a	540	return (uint8_t *)&domain;
d62a17ae	541
d62a17ae	542	case RIP2PEERLASTUPDATE:
718e3744	543	#if 0
	544	/* We don't know the SNMP agent startup time. We have two choices here:
	545	* - assume ripd startup time equals SNMP agent startup time
	546	* - don't support this variable, at all
	547	* Currently, we do the latter...
	548	*/
	549	*val_len = sizeof (time_t);
	550	uptime = peer->uptime; /* now - snmp_agent_startup - peer->uptime */
d7c0a89a	551	return (uint8_t *) &uptime;
718e3744	552	#else
d7c0a89a	553	return (uint8_t *)NULL;
718e3744	554	#endif
718e3744	555
d62a17ae	556	case RIP2PEERVERSION:
	557	*val_len = sizeof(int);
	558	version = peer->version;
d7c0a89a	559	return (uint8_t *)&version;
718e3744	560
d62a17ae	561	case RIP2PEERRCVBADPACKETS:
d62a17ae	562	*val_len = sizeof(int);
d7c0a89a	563	return (uint8_t *)&peer->recv_badpackets;
718e3744	564
d62a17ae	565	case RIP2PEERRCVBADROUTES:
d62a17ae	566	*val_len = sizeof(int);
d7c0a89a	567	return (uint8_t *)&peer->recv_badroutes;
718e3744	568
d62a17ae	569	default:
	570	return NULL;
	571	}
	572	return NULL;
718e3744	573	}
	574
	575	/* Register RIPv2-MIB. */
d62a17ae	576	static int rip_snmp_init(struct thread_master *master)
718e3744	577	{
d62a17ae	578	rip_ifaddr_table = route_table_init();
718e3744	579
d62a17ae	580	smux_init(master);
	581	REGISTER_MIB("mibII/rip", rip_variables, variable, rip_oid);
	582	return 0;
718e3744	583	}
5986b66b	584
d62a17ae	585	static int rip_snmp_module_init(void)
5986b66b	586	{
d62a17ae	587	hook_register(rip_ifaddr_add, rip_snmp_ifaddr_add);
d62a17ae	588	hook_register(rip_ifaddr_del, rip_snmp_ifaddr_del);
5986b66b	589
d62a17ae	590	hook_register(frr_late_init, rip_snmp_init);
d62a17ae	591	return 0;
5986b66b DL	592	}
5986b66b DL	593
d62a17ae	594	FRR_MODULE_SETUP(.name = "ripd_snmp", .version = FRR_VERSION,
	595	.description = "ripd AgentX SNMP module",
	596	.init = rip_snmp_module_init, )