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frr/isisd/isis_snmp.c

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Adding upstream version 10.1.1. Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:03:58 +01:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ISIS SNMP support
* Copyright (C) 2020 Volta Networks, Inc.
* Aleksey Romanov
*/
/*
* This is minimal read-only implementations providing isisReadOnlyCompliance
*/
#include <zebra.h>
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include "vrf.h"
#include "if.h"
#include "log.h"
#include "prefix.h"
#include "table.h"
#include "command.h"
#include "memory.h"
#include "smux.h"
#include "libfrr.h"
#include "lib/version.h"
#include "lib/zclient.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_network.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_adjacency.h"
#include "isisd/isis_dynhn.h"
#include "isisd/isis_te.h"
#include "isisd/isis_dr.h"
#include "isisd/isis_nb.h"
#include "isisd/isisd.h"
/* ISIS-MIB. */
#define ISIS_MIB 1, 3, 6, 1, 2, 1, 138
#define ISIS_OBJECTS 1
#define ISIS_SYSTEM 1, 1
#define ISIS_SYSLEVEL 1, 2
#define ISIS_CIRC 1, 3
#define ISIS_CIRC_LEVEL_VALUES 1, 4
#define ISIS_COUNTERS 1, 5
#define ISIS_ISADJ 1, 6
/************************ isisSystemGroup ************************/
/* isisSysObject */
#define ISIS_SYS_OBJECT 1, 1, 1
#define ISIS_SYS_VERSION 1
#define ISIS_SYS_LEVELTYPE 2
#define ISIS_SYS_ID 3
#define ISIS_SYS_MAXPATHSPLITS 4
#define ISIS_SYS_MAXLSPGENINT 5
#define ISIS_SYS_POLLESHELLORATE 6
#define ISIS_SYS_WAITTIME 7
#define ISIS_SYS_ADMINSTATE 8
#define ISIS_SYS_L2TOL1LEAKING 9
#define ISIS_SYS_MAXAGE 10
#define ISIS_SYS_RECEIVELSPBUFFERSIZE 11
#define ISIS_SYS_PROTSUPPORTED 12
#define ISIS_SYS_NOTIFICATIONENABLE 13
/* isisManAreaAddrEntry */
#define ISIS_MANAREA_ADDRENTRY 1, 1, 2, 1
#define ISIS_MANAREA_ADDREXISTSTATE 2
/* isisAreaAddrEntry */
#define ISIS_AREA_ADDRENTRY 1, 1, 3, 1
#define ISIS_AREA_ADDR 1
/* isisSummAddrEntry */
#define ISIS_SUMM_ADDRENTRY 1, 1, 4, 1
#define ISIS_SUMM_ADDREXISTSTATE 4
#define ISIS_SUMM_ADDRMETRIC 5
#define ISIS_SUMM_ADDRFULLMETRIC 6
/* isisRedistributeAddrEntry */
#define ISIS_REDISTRIBUTE_ADDRENTRY 1, 1, 5, 1
#define ISIS_REDISTRIBUTE_ADDREXISTSTATE 3
/* isisRouterEntry */
#define ISIS_ROUTER_ENTRY 1, 1, 6, 1
#define ISIS_ROUTER_HOSTNAME 3
#define ISIS_ROUTER_ID 4
/* isisSysLevelTable */
#define ISIS_SYSLEVEL_ENTRY 1, 2, 1, 1
#define ISIS_SYSLEVEL_ORIGLSPBUFFSIZE 2
#define ISIS_SYSLEVEL_MINLSPGENINT 3
#define ISIS_SYSLEVEL_STATE 4
#define ISIS_SYSLEVEL_SETOVERLOAD 5
#define ISIS_SYSLEVEL_SETOVERLOADUNTIL 6
#define ISIS_SYSLEVEL_METRICSTYLE 7
#define ISIS_SYSLEVEL_SPFCONSIDERS 8
#define ISIS_SYSLEVEL_TEENABLED 9
/* isisSystemCounterEntry */
#define ISIS_SYSTEM_COUNTER_ENTRY 1, 5, 1, 1
#define ISIS_SYSSTAT_CORRLSPS 2
#define ISIS_SYSSTAT_AUTHTYPEFAILS 3
#define ISIS_SYSSTAT_AUTHFAILS 4
#define ISIS_SYSSTAT_LSPDBASEOLOADS 5
#define ISIS_SYSSTAT_MANADDRDROPFROMAREAS 6
#define ISIS_SYSSTAT_ATTMPTTOEXMAXSEQNUMS 7
#define ISIS_SYSSTAT_SEQNUMSKIPS 8
#define ISIS_SYSSTAT_OWNLSPPURGES 9
#define ISIS_SYSSTAT_IDFIELDLENMISMATCHES 10
#define ISIS_SYSSTAT_PARTCHANGES 11
#define ISIS_SYSSTAT_SPFRUNS 12
#define ISIS_SYSSTAT_LSPERRORS 13
/************************ isisCircuitGroup ************************/
/* Scalar directly under isisCirc */
#define ISIS_NEXTCIRC_INDEX 1
/* isisCircEntry */
#define ISIS_CIRC_ENTRY 1, 3, 2, 1
#define ISIS_CIRC_IFINDEX 2
#define ISIS_CIRC_ADMINSTATE 3
#define ISIS_CIRC_EXISTSTATE 4
#define ISIS_CIRC_TYPE 5
#define ISIS_CIRC_EXTDOMAIN 6
#define ISIS_CIRC_LEVELTYPE 7
#define ISIS_CIRC_PASSIVECIRCUIT 8
#define ISIS_CIRC_MESHGROUPENABLED 9
#define ISIS_CIRC_MESHGROUP 10
#define ISIS_CIRC_SMALLHELLOS 11
#define ISIS_CIRC_LASTUPTIME 12
#define ISIS_CIRC_3WAYENABLED 13
#define ISIS_CIRC_EXTENDEDCIRCID 14
/* isisCircLevelEntry */
#define ISIS_CIRCLEVEL_ENTRY 1, 4, 1, 1
#define ISIS_CIRCLEVEL_METRIC 2
#define ISIS_CIRCLEVEL_WIDEMETRIC 3
#define ISIS_CIRCLEVEL_ISPRIORITY 4
#define ISIS_CIRCLEVEL_IDOCTET 5
#define ISIS_CIRCLEVEL_ID 6
#define ISIS_CIRCLEVEL_DESIS 7
#define ISIS_CIRCLEVEL_HELLOMULTIPLIER 8
#define ISIS_CIRCLEVEL_HELLOTIMER 9
#define ISIS_CIRCLEVEL_DRHELLOTIMER 10
#define ISIS_CIRCLEVEL_LSPTHROTTLE 11
#define ISIS_CIRCLEVEL_MINLSPRETRANSINT 12
#define ISIS_CIRCLEVEL_CSNPINTERVAL 13
#define ISIS_CIRCLEVEL_PARTSNPINTERVAL 14
/* isisCircuitCounterEntry */
#define ISIS_CIRC_COUNTER_ENTRY 1, 5, 2, 1
#define ISIS_CIRC_ADJCHANGES 2
#define ISIS_CIRC_NUMADJ 3
#define ISIS_CIRC_INITFAILS 4
#define ISIS_CIRC_REJADJS 5
#define ISIS_CIRC_IDFIELDLENMISMATCHES 6
#define ISIS_CIRC_MAXAREAADDRMISMATCHES 7
#define ISIS_CIRC_AUTHTYPEFAILS 8
#define ISIS_CIRC_AUTHFAILS 9
#define ISIS_CIRC_LANDESISCHANGES 10
/************************ isisISAdjGroup ************************/
/* isisISAdjEntry */
#define ISIS_ISADJ_ENTRY 1, 6, 1, 1
#define ISIS_ISADJ_STATE 2
#define ISIS_ISADJ_3WAYSTATE 3
#define ISIS_ISADJ_NEIGHSNPAADDRESS 4
#define ISIS_ISADJ_NEIGHSYSTYPE 5
#define ISIS_ISADJ_NEIGHSYSID 6
#define ISIS_ISADJ_NBREXTENDEDCIRCID 7
#define ISIS_ISADJ_USAGE 8
#define ISIS_ISADJ_HOLDTIMER 9
#define ISIS_ISADJ_NEIGHPRIORITY 10
#define ISIS_ISADJ_LASTUPTIME 11
/* isisISAdjAreadAddrEntry */
#define ISIS_ISADJAREA_ADDRENTRY 1, 6, 2, 1
#define ISIS_ISADJAREA_ADDRESS 2
/* isisISAdjIPAddrEntry*/
#define ISIS_ISADJIPADDR_ENTRY 1, 6, 3, 1
#define ISIS_ISADJIPADDR_TYPE 2
#define ISIS_ISADJIPADDR_ADDRESS 3
/* isisISAdjProtSuppEntty */
#define ISIS_ISADJPROTSUPP_ENTRY 1, 6, 4, 1
#define ISIS_ISADJPROTSUPP_PROTOCOL 1
/************************ Trap data variables ************************/
#define ISIS_NOTIFICATION_ENTRY 1, 10, 1
#define ISIS_NOTIF_SYLELVELINDEX 1
#define ISIS_NOTIF_CIRCIFINDEX 2
#define ISIS_PDU_LSPID 3
#define ISIS_PDU_FRAGMENT 4
#define ISIS_PDU_FIELDLEN 5
#define ISIS_PDU_MAXAREAADDR 6
#define ISIS_PDU_PROTOVER 7
#define ISIS_PDU_LSPSIZE 8
#define ISIS_PDU_ORIGBUFFERSIZE 9
#define ISIS_PDU_BUFFERSIZE 10
#define ISIS_PDU_PROTSUPP 11
#define ISIS_ADJ_STATE 12
#define ISIS_ERROR_OFFSET 13
#define ISIS_ERROR_TLVTYPE 14
#define ISIS_NOTIF_AREAADDR 15
/************************ Traps ************************/
#define ISIS_NOTIFICATIONS ISIS_MIB, 0
#define ISIS_TRAP_DB_OVERLOAD 1
#define ISIS_TRAP_MAN_ADDR_DROP 2
#define ISIS_TRAP_CORRUPTED_LSP 3
#define ISIS_TRAP_LSP_EXCEED_MAX 4
#define ISIS_TRAP_ID_LEN_MISMATCH 5
#define ISIS_TRAP_MAX_AREA_ADDR_MISMATCH 6
#define ISIS_TRAP_OWN_LSP_PURGE 7
#define ISIS_TRAP_SEQNO_SKIPPED 8
#define ISIS_TRAP_AUTHEN_TYPE_FAILURE 9
#define ISIS_TRAP_AUTHEN_FAILURE 10
#define ISIS_TRAP_VERSION_SKEW 11
#define ISIS_TRAP_AREA_MISMATCH 12
#define ISIS_TRAP_REJ_ADJACENCY 13
#define ISIS_TRAP_LSP_TOO_LARGE 14
#define ISIS_TRAP_LSP_BUFFSIZE_MISMATCH 15
#define ISIS_TRAP_PROTSUPP_MISMATCH 16
#define ISIS_TRAP_ADJ_STATE_CHANGE 17
#define ISIS_TRAP_LSP_ERROR 18
/* Change this definition if number of traps changes */
#define ISIS_TRAP_LAST_TRAP ISIS_TRAP_LSP_ERROR + 1
#define ISIS_SNMP_TRAP_VAR 1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0
/* SNMP value hack. */
#define COUNTER32 ASN_COUNTER
#define INTEGER ASN_INTEGER
#define UNSIGNED32 ASN_GAUGE
#define TIMESTAMP ASN_TIMETICKS
#define TIMETICKS ASN_TIMETICKS
#define STRING ASN_OCTET_STR
/* Declare static local variables for convenience. */
SNMP_LOCAL_VARIABLES
/*
* Define time function, it serves two purposes
* 1. Uses unint32_t for unix time and encapsulates
* sing extension issues in conversion from time_t
*
* 2. I could be replaced in unit test environment
*/
/* ISIS-MIB instances. */
static oid isis_oid[] = {ISIS_MIB};
/* SNMP trap variable */
static oid isis_snmp_trap_var[] = {ISIS_SNMP_TRAP_VAR};
/* SNMP trap values (others are calculated on the fly */
static oid isis_snmp_notifications[] = {ISIS_NOTIFICATIONS};
static oid isis_snmp_trap_val_db_overload[] = {ISIS_NOTIFICATIONS,
ISIS_TRAP_DB_OVERLOAD};
static oid isis_snmp_trap_val_lsp_exceed_max[] = {ISIS_NOTIFICATIONS,
ISIS_TRAP_LSP_EXCEED_MAX};
static oid isis_snmp_trap_val_area_mismatch[] = {ISIS_NOTIFICATIONS,
ISIS_TRAP_AREA_MISMATCH};
static oid isis_snmp_trap_val_lsp_error[] = {ISIS_NOTIFICATIONS,
ISIS_TRAP_LSP_ERROR};
/*
* Trap vars under 'isisNotifications': note: we use full names of variables
* scalar index
*/
static oid isis_snmp_trap_data_var_sys_level_index[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_NOTIF_SYLELVELINDEX, 0};
static oid isis_snmp_trap_data_var_circ_if_index[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_NOTIF_CIRCIFINDEX, 0};
static oid isis_snmp_trap_data_var_pdu_lsp_id[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_PDU_LSPID, 0};
static oid isis_snmp_trap_data_var_pdu_fragment[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_PDU_FRAGMENT, 0};
static oid isis_snmp_trap_data_var_pdu_field_len[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_PDU_FIELDLEN, 0};
static oid isis_snmp_trap_data_var_pdu_max_area_addr[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_PDU_MAXAREAADDR, 0};
static oid isis_snmp_trap_data_var_pdu_proto_ver[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_PDU_PROTOVER, 0};
static oid isis_snmp_trap_data_var_pdu_lsp_size[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_PDU_LSPSIZE, 0};
static oid isis_snmp_trap_data_var_adj_state[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_ADJ_STATE, 0};
static oid isis_snmp_trap_data_var_error_offset[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_ERROR_OFFSET, 0};
static oid isis_snmp_trap_data_var_error_tlv_type[] = {
ISIS_MIB, ISIS_NOTIFICATION_ENTRY, ISIS_ERROR_TLVTYPE, 0};
/*
* Other variables used by traps: note we use full names of variables and
* reserve space for index
*/
static oid isis_snmp_trap_data_var_sys_level_state[] = {
ISIS_MIB, ISIS_SYSLEVEL_ENTRY, ISIS_SYSLEVEL_STATE, 0};
/* Throttle time values for traps */
static time_t isis_snmp_trap_timestamp[ISIS_TRAP_LAST_TRAP]; /* ?? 1 */
/* Max len of raw-pdu in traps */
#define ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN (64)
/*
* Just to save on typing we have a shortcut structure
* to specify mib layout as prefix/leaf combination
*/
#define ISIS_SNMP_PREF_LEN_MAX 10
struct isis_var_prefix {
FindVarMethod *findVar;
uint8_t ivd_pref_len;
oid ivd_pref[ISIS_SNMP_PREF_LEN_MAX];
};
/* Find-val functions */
static uint8_t *isis_snmp_find_sys_object(struct variable *, oid *, size_t *,
int, size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_man_area(struct variable *, oid *, size_t *, int,
size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_area_addr(struct variable *, oid *, size_t *,
int, size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_summ_addr(struct variable *, oid *, size_t *,
int, size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_redistribute_addr(struct variable *, oid *,
size_t *, int, size_t *,
WriteMethod **);
static uint8_t *isis_snmp_find_router(struct variable *, oid *, size_t *, int,
size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_sys_level(struct variable *, oid *, size_t *,
int, size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_system_counter(struct variable *, oid *,
size_t *, int, size_t *,
WriteMethod **);
static uint8_t *isis_snmp_find_next_circ_index(struct variable *, oid *,
size_t *, int, size_t *,
WriteMethod **);
static uint8_t *isis_snmp_find_circ(struct variable *, oid *, size_t *, int,
size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_circ_level(struct variable *, oid *, size_t *,
int, size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_circ_counter(struct variable *, oid *, size_t *,
int, size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_isadj(struct variable *, oid *, size_t *, int,
size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_isadj_area(struct variable *, oid *, size_t *,
int, size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_isadj_ipaddr(struct variable *, oid *, size_t *,
int, size_t *, WriteMethod **);
static uint8_t *isis_snmp_find_isadj_prot_supp(struct variable *, oid *,
size_t *, int, size_t *,
WriteMethod **);
/*
* Just to save on typing we have a shortcut structure
* to specify mib layout, we populate the rest of the data
* during initialization
*/
#define ISIS_PREF_LEN_MAX (6)
struct isis_func_to_prefix {
FindVarMethod *ihtp_func;
oid ihtp_pref_oid[ISIS_PREF_LEN_MAX];
uint8_t ihtp_pref_len;
};
static struct isis_func_to_prefix isis_func_to_prefix_arr[] = {
{isis_snmp_find_sys_object, {ISIS_SYS_OBJECT}, 3},
{isis_snmp_find_man_area, {ISIS_MANAREA_ADDRENTRY}, 4},
{isis_snmp_find_area_addr, {ISIS_AREA_ADDRENTRY}, 4},
{isis_snmp_find_summ_addr, {ISIS_SUMM_ADDRENTRY}, 4},
{isis_snmp_find_redistribute_addr, {ISIS_REDISTRIBUTE_ADDRENTRY}, 4},
{isis_snmp_find_router, {ISIS_ROUTER_ENTRY}, 4},
{isis_snmp_find_sys_level, {ISIS_SYSLEVEL_ENTRY}, 4},
{isis_snmp_find_system_counter, {ISIS_SYSTEM_COUNTER_ENTRY}, 4},
{isis_snmp_find_next_circ_index, {ISIS_CIRC}, 2},
{isis_snmp_find_circ, {ISIS_CIRC_ENTRY}, 4},
{isis_snmp_find_circ_level, {ISIS_CIRCLEVEL_ENTRY}, 4},
{isis_snmp_find_circ_counter, {ISIS_CIRC_COUNTER_ENTRY}, 4},
{isis_snmp_find_isadj, {ISIS_ISADJ_ENTRY}, 4},
{isis_snmp_find_isadj_area, {ISIS_ISADJAREA_ADDRENTRY}, 4},
{isis_snmp_find_isadj_ipaddr, {ISIS_ISADJIPADDR_ENTRY}, 4},
{isis_snmp_find_isadj_prot_supp, {ISIS_ISADJPROTSUPP_ENTRY}, 4},
};
static size_t isis_func_to_prefix_count = array_size(isis_func_to_prefix_arr);
static struct variable isis_var_arr[] = {
{ISIS_SYS_VERSION, INTEGER, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_LEVELTYPE, INTEGER, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_ID, STRING, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_MAXPATHSPLITS, UNSIGNED32, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_MAXLSPGENINT, UNSIGNED32, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_POLLESHELLORATE, UNSIGNED32, RONLY,
isis_snmp_find_sys_object},
{ISIS_SYS_WAITTIME, UNSIGNED32, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_ADMINSTATE, INTEGER, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_L2TOL1LEAKING, INTEGER, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_MAXAGE, UNSIGNED32, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_RECEIVELSPBUFFERSIZE, UNSIGNED32, RONLY,
isis_snmp_find_sys_object},
{ISIS_SYS_PROTSUPPORTED, STRING, RONLY, isis_snmp_find_sys_object},
{ISIS_SYS_NOTIFICATIONENABLE, INTEGER, RONLY,
isis_snmp_find_sys_object},
{ISIS_MANAREA_ADDREXISTSTATE, INTEGER, RONLY, isis_snmp_find_man_area},
{ISIS_AREA_ADDR, STRING, RONLY, isis_snmp_find_area_addr},
{ISIS_SUMM_ADDREXISTSTATE, INTEGER, RONLY, isis_snmp_find_summ_addr},
{ISIS_SUMM_ADDRMETRIC, UNSIGNED32, RONLY, isis_snmp_find_summ_addr},
{ISIS_SUMM_ADDRFULLMETRIC, UNSIGNED32, RONLY, isis_snmp_find_summ_addr},
{ISIS_REDISTRIBUTE_ADDREXISTSTATE, INTEGER, RONLY,
isis_snmp_find_redistribute_addr},
{ISIS_ROUTER_HOSTNAME, STRING, RONLY, isis_snmp_find_router},
{ISIS_ROUTER_ID, UNSIGNED32, RONLY, isis_snmp_find_router},
{ISIS_SYSLEVEL_ORIGLSPBUFFSIZE, UNSIGNED32, RONLY,
isis_snmp_find_sys_level},
{ISIS_SYSLEVEL_MINLSPGENINT, UNSIGNED32, RONLY,
isis_snmp_find_sys_level},
{ISIS_SYSLEVEL_STATE, INTEGER, RONLY, isis_snmp_find_sys_level},
{ISIS_SYSLEVEL_SETOVERLOAD, INTEGER, RONLY, isis_snmp_find_sys_level},
{ISIS_SYSLEVEL_SETOVERLOADUNTIL, UNSIGNED32, RONLY,
isis_snmp_find_sys_level},
{ISIS_SYSLEVEL_METRICSTYLE, INTEGER, RONLY, isis_snmp_find_sys_level},
{ISIS_SYSLEVEL_SPFCONSIDERS, INTEGER, RONLY, isis_snmp_find_sys_level},
{ISIS_SYSLEVEL_TEENABLED, INTEGER, RONLY, isis_snmp_find_sys_level},
{ISIS_SYSSTAT_CORRLSPS, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_AUTHTYPEFAILS, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_AUTHFAILS, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_LSPDBASEOLOADS, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_MANADDRDROPFROMAREAS, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_ATTMPTTOEXMAXSEQNUMS, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_SEQNUMSKIPS, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_OWNLSPPURGES, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_IDFIELDLENMISMATCHES, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_PARTCHANGES, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_SYSSTAT_SPFRUNS, COUNTER32, RONLY, isis_snmp_find_system_counter},
{ISIS_SYSSTAT_LSPERRORS, COUNTER32, RONLY,
isis_snmp_find_system_counter},
{ISIS_NEXTCIRC_INDEX, UNSIGNED32, RONLY,
isis_snmp_find_next_circ_index},
{ISIS_CIRC_IFINDEX, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_ADMINSTATE, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_EXISTSTATE, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_TYPE, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_EXTDOMAIN, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_LEVELTYPE, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_PASSIVECIRCUIT, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_MESHGROUPENABLED, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_MESHGROUP, UNSIGNED32, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_SMALLHELLOS, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_LASTUPTIME, TIMESTAMP, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_3WAYENABLED, INTEGER, RONLY, isis_snmp_find_circ},
{ISIS_CIRC_EXTENDEDCIRCID, UNSIGNED32, RONLY, isis_snmp_find_circ},
{ISIS_CIRCLEVEL_METRIC, UNSIGNED32, RONLY, isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_WIDEMETRIC, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_ISPRIORITY, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_IDOCTET, UNSIGNED32, RONLY, isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_ID, STRING, RONLY, isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_DESIS, STRING, RONLY, isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_HELLOMULTIPLIER, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_HELLOTIMER, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_DRHELLOTIMER, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_LSPTHROTTLE, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_MINLSPRETRANSINT, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_CSNPINTERVAL, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRCLEVEL_PARTSNPINTERVAL, UNSIGNED32, RONLY,
isis_snmp_find_circ_level},
{ISIS_CIRC_ADJCHANGES, COUNTER32, RONLY, isis_snmp_find_circ_counter},
{ISIS_CIRC_NUMADJ, UNSIGNED32, RONLY, isis_snmp_find_circ_counter},
{ISIS_CIRC_INITFAILS, COUNTER32, RONLY, isis_snmp_find_circ_counter},
{ISIS_CIRC_REJADJS, COUNTER32, RONLY, isis_snmp_find_circ_counter},
{ISIS_CIRC_IDFIELDLENMISMATCHES, COUNTER32, RONLY,
isis_snmp_find_circ_counter},
{ISIS_CIRC_MAXAREAADDRMISMATCHES, COUNTER32, RONLY,
isis_snmp_find_circ_counter},
{ISIS_CIRC_AUTHTYPEFAILS, COUNTER32, RONLY,
isis_snmp_find_circ_counter},
{ISIS_CIRC_AUTHFAILS, COUNTER32, RONLY, isis_snmp_find_circ_counter},
{ISIS_CIRC_LANDESISCHANGES, COUNTER32, RONLY,
isis_snmp_find_circ_counter},
{ISIS_ISADJ_STATE, INTEGER, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_3WAYSTATE, INTEGER, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_NEIGHSNPAADDRESS, STRING, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_NEIGHSYSTYPE, INTEGER, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_NEIGHSYSID, STRING, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_NBREXTENDEDCIRCID, UNSIGNED32, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_USAGE, INTEGER, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_HOLDTIMER, UNSIGNED32, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_NEIGHPRIORITY, UNSIGNED32, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJ_LASTUPTIME, TIMESTAMP, RONLY, isis_snmp_find_isadj},
{ISIS_ISADJAREA_ADDRESS, STRING, RONLY, isis_snmp_find_isadj_area},
{ISIS_ISADJIPADDR_TYPE, INTEGER, RONLY, isis_snmp_find_isadj_ipaddr},
{ISIS_ISADJIPADDR_ADDRESS, STRING, RONLY, isis_snmp_find_isadj_ipaddr},
{ISIS_ISADJPROTSUPP_PROTOCOL, INTEGER, RONLY,
isis_snmp_find_isadj_prot_supp},
};
static const size_t isis_var_count = array_size(isis_var_arr);
/* Minimal set of hard-coded data */
#define ISIS_VERSION (1)
/* If sys-id is not set use this value */
static uint8_t isis_null_sysid[ISIS_SYS_ID_LEN];
/* OSI addr-len */
#define ISIS_SNMP_OSI_ADDR_LEN_MAX (20)
/*
* The implementation has a fixed max-path splits value
* of 64 (see ISIS_MAX_PATH_SPLITS), the max mib value
* is 32.
*
* FIXME(aromanov): should we return 32 or 64?
*/
#define ISIS_SNMP_MAX_PATH_SPLITS (32)
#define ISIS_SNMP_ADMIN_STATE_ON (1)
#define ISIS_SNMP_ROW_STATUS_ACTIVE (1)
#define ISIS_SNMP_LEVEL_STATE_OFF (1)
#define ISIS_SNMP_LEVEL_STATE_ON (2)
#define ISIS_SNMP_LEVEL_STATE_WAITING (3)
#define ISIS_SNMP_LEVEL_STATE_OVERLOADED (4)
#define ISIS_SNMP_TRUTH_VALUE_TRUE (1)
#define ISIS_SNMP_TRUTH_VALUE_FALSE (2)
#define ISIS_SNMP_METRIC_STYLE_NARROW (1)
#define ISIS_SNMP_METRIC_STYLE_WIDE (2)
#define ISIS_SNMP_METRIC_STYLE_BOTH (3)
#define ISIS_SNMP_MESH_GROUP_INACTIVE (1)
#define ISIS_SNMP_ADJ_STATE_DOWN (1)
#define ISIS_SNMP_ADJ_STATE_INITIALIZING (2)
#define ISIS_SNMP_ADJ_STATE_UP (3)
#define ISIS_SNMP_ADJ_STATE_FAILED (4)
static inline uint32_t isis_snmp_adj_state(enum isis_adj_state state)
{
switch (state) {
case ISIS_ADJ_UNKNOWN:
return ISIS_SNMP_ADJ_STATE_DOWN;
case ISIS_ADJ_INITIALIZING:
return ISIS_SNMP_ADJ_STATE_INITIALIZING;
case ISIS_ADJ_UP:
return ISIS_SNMP_ADJ_STATE_UP;
case ISIS_ADJ_DOWN:
return ISIS_SNMP_ADJ_STATE_FAILED;
}
return 0; /* not reached */
}
#define ISIS_SNMP_ADJ_NEIGHTYPE_IS_L1 (1)
#define ISIS_SNMP_ADJ_NEIGHTYPE_IS_L2 (2)
#define ISIS_SNMP_ADJ_NEIGHTYPE_IS_L1_L2 (3)
#define ISIS_SNMP_ADJ_NEIGHTYPE_UNKNOWN (4)
static inline uint32_t isis_snmp_adj_neightype(enum isis_system_type type)
{
switch (type) {
case ISIS_SYSTYPE_UNKNOWN:
case ISIS_SYSTYPE_ES:
return ISIS_SNMP_ADJ_NEIGHTYPE_UNKNOWN;
case ISIS_SYSTYPE_IS:
return ISIS_SNMP_ADJ_NEIGHTYPE_IS_L1_L2;
case ISIS_SYSTYPE_L1_IS:
return ISIS_SNMP_ADJ_NEIGHTYPE_IS_L1;
case ISIS_SYSTYPE_L2_IS:
return ISIS_SNMP_ADJ_NEIGHTYPE_IS_L2;
}
return 0; /* not reached */
}
#define ISIS_SNMP_INET_TYPE_V4 (1)
#define ISIS_SNMP_INET_TYPE_V6 (2)
#define ISIS_SNMP_P2P_CIRCUIT (3)
/* Protocols supported value */
static uint8_t isis_snmp_protocols_supported = 0x7; /* All: iso, ipv4, ipv6 */
#define SNMP_CIRCUITS_MAX (512)
static struct isis_circuit *snmp_circuits[SNMP_CIRCUITS_MAX];
static uint32_t snmp_circuit_id_last;
static int isis_circuit_snmp_id_gen(struct isis_circuit *circuit)
{
uint32_t id;
uint32_t i;
id = snmp_circuit_id_last;
id++;
/* find next unused entry */
for (i = 0; i < SNMP_CIRCUITS_MAX; i++) {
if (id >= SNMP_CIRCUITS_MAX) {
id = 0;
continue;
}
if (id == 0)
continue;
if (snmp_circuits[id] == NULL)
break;
id++;
}
if (i == SNMP_CIRCUITS_MAX) {
zlog_warn("Could not allocate a smmp-circuit-id");
return 0;
}
snmp_circuits[id] = circuit;
snmp_circuit_id_last = id;
circuit->snmp_id = id;
return 0;
}
static int isis_circuit_snmp_id_free(struct isis_circuit *circuit)
{
snmp_circuits[circuit->snmp_id] = NULL;
circuit->snmp_id = 0;
return 0;
}
/*
* Convenience function to move to the next circuit,
*/
static struct isis_circuit *isis_snmp_circuit_next(struct isis_circuit *circuit)
{
uint32_t start;
uint32_t off;
start = 1;
if (circuit != NULL)
start = circuit->snmp_id + 1;
for (off = start; off < SNMP_CIRCUITS_MAX; off++) {
circuit = snmp_circuits[off];
if (circuit != NULL)
return circuit;
}
return NULL;
}
/*
* Convenience function to get the first matching level
*/
static int isis_snmp_circuit_get_level_lo(struct isis_circuit *circuit)
{
if (circuit->is_type == IS_LEVEL_2)
return IS_LEVEL_2;
return IS_LEVEL_1;
}
/* Check level match */
static int isis_snmp_get_level_match(int is_type, int level)
{
if (is_type != IS_LEVEL_1 && is_type != IS_LEVEL_2
&& is_type != IS_LEVEL_1_AND_2)
return 0;
if (level != IS_LEVEL_1 && level != IS_LEVEL_2)
return 0;
if (is_type == IS_LEVEL_1) {
if (level == IS_LEVEL_1)
return 1;
return 0;
}
if (is_type == IS_LEVEL_2) {
if (level == IS_LEVEL_2)
return 1;
return 0;
}
return 1;
}
/*
* Helper function to convert oid index representing
* octet-string index (e.g. isis-sys-id) to byte string
* representing the same index.
*
* Also we do not fail if idx is longer than max_len,
* so we can use the same function to check compound
* indexes.
*/
static int isis_snmp_conv_exact(uint8_t *buf, size_t max_len, size_t *out_len,
const oid *idx, size_t idx_len)
{
size_t off;
size_t len;
/* Oid representation: length followed by bytes */
if (idx == NULL || idx_len == 0)
return 0;
len = idx[0];
if (len > max_len)
return 0;
if (idx_len < len + 1)
return 0;
for (off = 0; off < len; off++) {
if (idx[off + 1] > 0xff)
return 0;
buf[off] = (uint8_t)(idx[off + 1] & 0xff);
}
*out_len = len;
return 1;
}
static int isis_snmp_conv_next(uint8_t *buf, size_t max_len, size_t *out_len,
int *try_exact, const oid *idx, size_t idx_len)
{
size_t off;
size_t len;
size_t cmp_len;
if (idx == NULL || idx_len == 0) {
*out_len = 0;
*try_exact = 1;
return 1;
}
len = idx[0];
if (len > max_len)
return 0;
cmp_len = len;
if ((idx_len - 1) < cmp_len)
cmp_len = idx_len - 1;
for (off = 0; off < cmp_len; off++) {
if (idx[off + 1] > 0xff) {
memset(buf + off, 0xff, len - off);
*out_len = len;
*try_exact = 1;
return 1;
}
buf[off] = (uint8_t)(idx[off + 1] & 0xff);
}
if (cmp_len < len)
memset(buf + cmp_len, 0, len - cmp_len);
*out_len = len;
*try_exact = cmp_len < len ? 1 : 0;
return 1;
}
/*
* Helper functions to find area address from snmp index
*/
static int isis_snmp_area_addr_lookup_exact(oid *oid_idx, size_t oid_idx_len,
struct isis_area **ret_area,
struct iso_address **ret_addr)
{
uint8_t cmp_buf[ISIS_SNMP_OSI_ADDR_LEN_MAX];
size_t addr_len;
struct isis_area *area = NULL;
struct iso_address *addr = NULL;
struct listnode *addr_node;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL)
return 0;
if (list_isempty(isis->area_list)) {
/* Area is not configured yet */
return 0;
}
area = listgetdata(listhead(isis->area_list));
int res = isis_snmp_conv_exact(cmp_buf, sizeof(cmp_buf), &addr_len,
oid_idx, oid_idx_len);
if (!res || addr_len == 0 || oid_idx_len != (addr_len + 1)) {
/* Bad conversion, empty address or extra oids at the end */
return 0;
}
for (ALL_LIST_ELEMENTS_RO(area->area_addrs, addr_node, addr)) {
if (addr->addr_len != addr_len)
continue;
if (memcmp(addr->area_addr, cmp_buf, addr_len) == 0) {
if (ret_area != 0)
*ret_area = area;
if (ret_addr != 0)
*ret_addr = addr;
return 1;
}
}
return 0;
}
static int isis_snmp_area_addr_lookup_next(oid *oid_idx, size_t oid_idx_len,
struct isis_area **ret_area,
struct iso_address **ret_addr)
{
uint8_t cmp_buf[ISIS_SNMP_OSI_ADDR_LEN_MAX];
size_t addr_len;
int try_exact = 0;
struct isis_area *found_area = NULL;
struct isis_area *area = NULL;
struct iso_address *found_addr = NULL;
struct iso_address *addr = NULL;
struct listnode *addr_node;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL)
return 0;
if (list_isempty(isis->area_list)) {
/* Area is not configured yet */
return 0;
}
area = listgetdata(listhead(isis->area_list));
int res = isis_snmp_conv_next(cmp_buf, sizeof(cmp_buf), &addr_len,
&try_exact, oid_idx, oid_idx_len);
if (!res)
return 0;
for (ALL_LIST_ELEMENTS_RO(area->area_addrs, addr_node, addr)) {
if (addr->addr_len < addr_len)
continue;
if (addr->addr_len == addr_len) {
if (addr_len == 0)
continue;
res = memcmp(addr->area_addr, cmp_buf, addr_len);
if (res < 0)
continue;
if (res == 0 && addr->addr_len == addr_len) {
if (try_exact) {
/*
* This is the best match no point
* to look further
*/
found_area = area;
found_addr = addr;
break;
}
continue;
}
}
if (found_addr == NULL || addr->addr_len < found_addr->addr_len
|| (addr->addr_len == found_addr->addr_len
&& memcmp(addr->area_addr, found_addr->area_addr,
addr->addr_len)
< 0)) {
found_area = area;
found_addr = addr;
}
}
if (found_area == NULL)
return 0;
if (ret_area != 0)
*ret_area = found_area;
if (ret_addr != 0)
*ret_addr = found_addr;
return 1;
}
/*
* Helper functions to find circuit from
* snmp index
*/
static int isis_snmp_circuit_lookup_exact(oid *oid_idx, size_t oid_idx_len,
struct isis_circuit **ret_circuit)
{
struct isis_circuit *circuit;
if (oid_idx == NULL || oid_idx_len < 1
|| oid_idx[0] > SNMP_CIRCUITS_MAX)
return 0;
circuit = snmp_circuits[oid_idx[0]];
if (circuit == NULL)
return 0;
if (ret_circuit != NULL)
*ret_circuit = circuit;
return 1;
}
static int isis_snmp_circuit_lookup_next(oid *oid_idx, size_t oid_idx_len,
struct isis_circuit **ret_circuit)
{
oid off;
oid start;
struct isis_circuit *circuit;
start = 0;
if (oid_idx != NULL && oid_idx_len != 0) {
if (oid_idx[0] > SNMP_CIRCUITS_MAX)
return 0;
start = oid_idx[0];
}
for (off = start; off < SNMP_CIRCUITS_MAX; ++off) {
circuit = snmp_circuits[off];
if (circuit != NULL && off > start) {
if (ret_circuit != NULL)
*ret_circuit = circuit;
return 1;
}
}
return 0;
}
/*
* Helper functions to find circuit level
* combination from snmp index
*/
static int isis_snmp_circuit_level_lookup_exact(
oid *oid_idx, size_t oid_idx_len, int check_match,
struct isis_circuit **ret_circuit, int *ret_level)
{
int level;
int res;
struct isis_circuit *circuit;
/* Minor optimization: check level first */
if (oid_idx == NULL || oid_idx_len < 2)
return 0;
if (oid_idx[1] < IS_LEVEL_1 || oid_idx[1] > IS_LEVEL_2)
return 0;
level = (int)oid_idx[1];
res = isis_snmp_circuit_lookup_exact(oid_idx, oid_idx_len, &circuit);
if (!res)
return 0;
if (check_match && !isis_snmp_get_level_match(circuit->is_type, level))
return 0;
if (ret_circuit != NULL)
*ret_circuit = circuit;
if (ret_level != NULL)
*ret_level = level;
return 1;
}
static int isis_snmp_circuit_level_lookup_next(
oid *oid_idx, size_t oid_idx_len, int check_match,
struct isis_circuit **ret_circuit, int *ret_level)
{
oid off;
oid start;
struct isis_circuit *circuit = NULL;
int level;
start = 0;
if (oid_idx != NULL && oid_idx_len != 0) {
if (oid_idx[0] > SNMP_CIRCUITS_MAX)
return 0;
start = oid_idx[0];
}
for (off = start; off < SNMP_CIRCUITS_MAX; off++) {
circuit = snmp_circuits[off];
if (circuit == NULL)
continue;
if (off > start || oid_idx_len < 2) {
/* Found and can use level 1 */
level = IS_LEVEL_1;
break;
}
assert(oid_idx != NULL);
/* We have to check level specified by index */
if (oid_idx[1] < IS_LEVEL_1) {
level = IS_LEVEL_1;
break;
}
if (oid_idx[1] < IS_LEVEL_2) {
level = IS_LEVEL_2;
break;
}
/* Try next */
circuit = NULL;
}
if (circuit == NULL)
return 0;
if (check_match
&& !isis_snmp_get_level_match(circuit->is_type, level)) {
if (level == IS_LEVEL_1) {
/*
* We can simply advance level because
* at least one level should match
*/
level = IS_LEVEL_2;
} else {
/* We have to move to the next circuit */
circuit = isis_snmp_circuit_next(circuit);
if (circuit == NULL)
return 0;
level = isis_snmp_circuit_get_level_lo(circuit);
}
}
if (ret_circuit != NULL)
*ret_circuit = circuit;
if (ret_level != NULL)
*ret_level = level;
return 1;
}
/*
* Helper functions to find adjacency
* from snmp index.
*
* We have 4 tables related to adjacency
* looking up adjacency is quite expensive
* in case of bcast interfaces.
*
* It is pain to have 4 very similar functions
* hence we pass in and out additional data
* we are looking for.
*
* Note: we use data-len value to distinguish
* between ipv4 and ipv6 addresses
*/
#define ISIS_SNMP_ADJ_DATA_NONE (1)
#define ISIS_SNMP_ADJ_DATA_AREA_ADDR (2)
#define ISIS_SNMP_ADJ_DATA_IP_ADDR (3)
#define ISIS_SNMP_ADJ_DATA_PROTO (4)
/*
* Helper function to process data associated
* with adjacency
*/
static int isis_snmp_adj_helper(struct isis_adjacency *adj, int data_id,
oid data_off, uint8_t **ret_data,
size_t *ret_data_len)
{
uint8_t *data = NULL;
size_t data_len = 0;
switch (data_id) {
case ISIS_SNMP_ADJ_DATA_NONE:
break;
case ISIS_SNMP_ADJ_DATA_AREA_ADDR:
if (data_off >= adj->area_address_count)
return 0;
data = adj->area_addresses[data_off].area_addr;
data_len = adj->area_addresses[data_off].addr_len;
break;
case ISIS_SNMP_ADJ_DATA_IP_ADDR:
if (data_off >= (adj->ipv4_address_count + adj->ll_ipv6_count))
return 0;
if (data_off >= adj->ipv4_address_count) {
data = (uint8_t *)&adj->ll_ipv6_addrs
[data_off - adj->ipv4_address_count];
data_len = sizeof(adj->ll_ipv6_addrs[0]);
} else {
data = (uint8_t *)&adj->ipv4_addresses[data_off];
data_len = sizeof(adj->ipv4_addresses[0]);
}
break;
case ISIS_SNMP_ADJ_DATA_PROTO:
if (data_off >= adj->nlpids.count)
return 0;
data = &adj->nlpids.nlpids[data_off];
data_len = sizeof(adj->nlpids.nlpids[0]);
break;
default:
assert(0);
return 0;
}
if (ret_data != NULL)
*ret_data = data;
if (ret_data_len != NULL)
*ret_data_len = data_len;
return 1;
}
static int isis_snmp_adj_lookup_exact(oid *oid_idx, size_t oid_idx_len,
int data_id,
struct isis_adjacency **ret_adj,
oid *ret_data_idx, uint8_t **ret_data,
size_t *ret_data_len)
{
int res;
struct listnode *node;
struct isis_circuit *circuit;
struct isis_adjacency *adj;
struct isis_adjacency *tmp_adj;
oid adj_idx;
oid data_off;
uint8_t *data;
size_t data_len;
res = isis_snmp_circuit_lookup_exact(oid_idx, oid_idx_len, &circuit);
if (!res)
return 0;
if (oid_idx == NULL || oid_idx_len < 2
|| (data_id != ISIS_SNMP_ADJ_DATA_NONE && oid_idx_len < 3))
return 0;
adj_idx = oid_idx[1];
if (data_id != ISIS_SNMP_ADJ_DATA_NONE) {
if (oid_idx[2] == 0)
return 0;
data_off = oid_idx[2] - 1;
} else {
/*
* Data-off is not used if data-id is none
* but we set it just for consistency
*/
data_off = 0;
}
adj = NULL;
data = NULL;
data_len = 0;
for (ALL_LIST_ELEMENTS_RO(circuit->snmp_adj_list, node, tmp_adj)) {
if (tmp_adj->snmp_idx > adj_idx) {
/*
* Adjacencies are ordered in the list
* no point to look further
*/
break;
}
if (tmp_adj->snmp_idx == adj_idx) {
res = isis_snmp_adj_helper(tmp_adj, data_id, data_off,
&data, &data_len);
if (res)
adj = tmp_adj;
break;
}
}
if (adj == NULL)
return 0;
if (ret_adj != NULL)
*ret_adj = adj;
if (ret_data_idx != NULL)
*ret_data_idx = data_off + 1;
if (ret_data)
*ret_data = data;
if (ret_data_len)
*ret_data_len = data_len;
return 1;
}
static int isis_snmp_adj_lookup_next(oid *oid_idx, size_t oid_idx_len,
int data_id,
struct isis_adjacency **ret_adj,
oid *ret_data_idx, uint8_t **ret_data,
size_t *ret_data_len)
{
struct listnode *node;
struct isis_circuit *circuit;
struct isis_adjacency *adj;
struct isis_adjacency *tmp_adj;
oid circ_idx;
oid adj_idx;
oid data_idx;
uint8_t *data;
size_t data_len;
adj = NULL;
data = NULL;
data_len = 0;
/*
* Note: we rely on the fact that data indexes are consequtive
* starting from 1
*/
if (oid_idx == 0 || oid_idx_len == 0) {
circ_idx = 0;
adj_idx = 0;
data_idx = 0;
} else if (oid_idx_len == 1) {
circ_idx = oid_idx[0];
adj_idx = 0;
data_idx = 0;
} else if (oid_idx_len == 2) {
circ_idx = oid_idx[0];
adj_idx = oid_idx[1];
data_idx = 0;
} else {
circ_idx = oid_idx[0];
adj_idx = oid_idx[1];
if (data_id == ISIS_SNMP_ADJ_DATA_NONE)
data_idx = 0;
else
data_idx = oid_idx[2];
}
if (!isis_snmp_circuit_lookup_exact(&circ_idx, 1, &circuit)
&& !isis_snmp_circuit_lookup_next(&circ_idx, 1, &circuit))
/* No circuit */
return 0;
if (circuit->snmp_id != circ_idx) {
/* Match is not exact */
circ_idx = 0;
adj_idx = 0;
data_idx = 0;
}
/*
* Note: the simple loop below will work in all cases
*/
while (circuit != NULL) {
for (ALL_LIST_ELEMENTS_RO(circuit->snmp_adj_list, node,
tmp_adj)) {
if (tmp_adj->snmp_idx < adj_idx)
continue;
if (tmp_adj->snmp_idx == adj_idx
&& data_id == ISIS_SNMP_ADJ_DATA_NONE)
continue;
if (adj_idx != 0 && tmp_adj->snmp_idx > adj_idx)
data_idx = 0;
if (isis_snmp_adj_helper(tmp_adj, data_id, data_idx,
&data, &data_len)) {
adj = tmp_adj;
break;
}
}
if (adj != NULL)
break;
circuit = isis_snmp_circuit_next(circuit);
circ_idx = 0;
adj_idx = 0;
data_idx = 0;
}
if (adj == NULL)
return 0;
if (ret_adj != NULL)
*ret_adj = adj;
if (ret_data_idx != 0) {
if (data_id == ISIS_SNMP_ADJ_DATA_NONE)
/*
* Value does not matter but let us set
* it to zero for consistency
*/
*ret_data_idx = 0;
else
*ret_data_idx = data_idx + 1;
}
if (ret_data != 0)
*ret_data = data;
if (ret_data_len != 0)
*ret_data_len = data_len;
return 1;
}
static uint8_t *isis_snmp_find_sys_object(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
struct isis_area *area = NULL;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL)
return NULL;
if (!list_isempty(isis->area_list))
area = listgetdata(listhead(isis->area_list));
/* Check whether the instance identifier is valid */
if (smux_header_generic(v, name, length, exact, var_len, write_method)
== MATCH_FAILED)
return NULL;
switch (v->magic) {
case ISIS_SYS_VERSION:
return SNMP_INTEGER(ISIS_VERSION);
case ISIS_SYS_LEVELTYPE:
/*
* If we do not have areas use 1&2 otherwise use settings
* from the first area in the list
*/
if (area == NULL)
return SNMP_INTEGER(IS_LEVEL_1_AND_2);
return SNMP_INTEGER(area->is_type);
case ISIS_SYS_ID:
if (!isis->sysid_set) {
*var_len = ISIS_SYS_ID_LEN;
return isis_null_sysid;
}
*var_len = ISIS_SYS_ID_LEN;
return isis->sysid;
case ISIS_SYS_MAXPATHSPLITS:
return SNMP_INTEGER(ISIS_SNMP_MAX_PATH_SPLITS);
case ISIS_SYS_MAXLSPGENINT:
return SNMP_INTEGER(DEFAULT_MAX_LSP_GEN_INTERVAL);
case ISIS_SYS_POLLESHELLORATE:
return SNMP_INTEGER(DEFAULT_HELLO_INTERVAL);
case ISIS_SYS_WAITTIME:
/* Note: it seems that we have same fixed delay time */
return SNMP_INTEGER(DEFAULT_MIN_LSP_GEN_INTERVAL);
case ISIS_SYS_ADMINSTATE:
/* If daemon is running it admin state is on */
return SNMP_INTEGER(ISIS_SNMP_ADMIN_STATE_ON);
case ISIS_SYS_L2TOL1LEAKING:
/* We do not allow l2-to-l1 leaking */
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_FALSE);
case ISIS_SYS_MAXAGE:
return SNMP_INTEGER(MAX_AGE);
case ISIS_SYS_RECEIVELSPBUFFERSIZE:
if (area == NULL)
return SNMP_INTEGER(DEFAULT_LSP_MTU);
return SNMP_INTEGER(area->lsp_mtu);
case ISIS_SYS_PROTSUPPORTED:
*var_len = 1;
return &isis_snmp_protocols_supported;
case ISIS_SYS_NOTIFICATIONENABLE:
if (isis->snmp_notifications)
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_TRUE);
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_FALSE);
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_man_area(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
int res;
struct iso_address *area_addr = NULL;
oid *oid_idx;
size_t oid_idx_len;
size_t off = 0;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_area_addr_lookup_exact(oid_idx, oid_idx_len,
NULL, &area_addr);
if (!res)
return NULL;
} else {
res = isis_snmp_area_addr_lookup_next(oid_idx, oid_idx_len,
NULL, &area_addr);
if (!res)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = area_addr->addr_len;
for (off = 0; off < area_addr->addr_len; off++)
name[v->namelen + 1 + off] = area_addr->area_addr[off];
*length = v->namelen + 1 + area_addr->addr_len;
}
switch (v->magic) {
case ISIS_MANAREA_ADDREXISTSTATE:
return SNMP_INTEGER(ISIS_SNMP_ROW_STATUS_ACTIVE);
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_area_addr(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
/*
* Area addresses in sense of addresses reported by L1 lsps
* are not supported yet.
*/
(void)v;
(void)name;
(void)length;
(void)exact;
(void)var_len;
*write_method = NULL;
return NULL;
}
static uint8_t *isis_snmp_find_summ_addr(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
/*
* So far there is no way to set summary table values through cli
* and snmp operations are read-only, hence there are no entries
*/
(void)v;
(void)name;
(void)length;
(void)exact;
(void)var_len;
*write_method = NULL;
return NULL;
}
static uint8_t *isis_snmp_find_redistribute_addr(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
/*
* It is not clear at the point whether redist code in isis is actually
* used for now we will consider that entries are not present
*/
(void)v;
(void)name;
(void)length;
(void)exact;
(void)var_len;
*write_method = NULL;
return NULL;
}
static uint8_t *isis_snmp_find_router(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
uint8_t cmp_buf[ISIS_SYS_ID_LEN];
size_t cmp_len;
int try_exact;
int cmp_level;
int res;
struct isis_dynhn *dyn = NULL;
oid *oid_idx;
size_t oid_idx_len;
size_t off = 0;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL)
return NULL;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_conv_exact(cmp_buf, sizeof(cmp_buf), &cmp_len,
oid_idx, oid_idx_len);
if (!res || cmp_len != ISIS_SYS_ID_LEN
|| oid_idx_len != (cmp_len + 2))
/*
* Bad conversion, or bad length,
* or extra oids at the end
*/
return NULL;
if (oid_idx[ISIS_SYS_ID_LEN + 1] < IS_LEVEL_1
|| oid_idx[ISIS_SYS_ID_LEN + 1] > IS_LEVEL_2)
/* Level part of the index is out of range */
return NULL;
cmp_level = (int)oid_idx[ISIS_SYS_ID_LEN + 1];
dyn = dynhn_find_by_id(isis, cmp_buf);
if (dyn == NULL || dyn->level != cmp_level)
return NULL;
switch (v->magic) {
case ISIS_ROUTER_HOSTNAME:
*var_len = strlen(dyn->hostname);
return (uint8_t *)dyn->hostname;
case ISIS_ROUTER_ID:
/* It seems that we do no know router-id in lsps */
return SNMP_INTEGER(0);
default:
break;
}
return NULL;
}
res = isis_snmp_conv_next(cmp_buf, sizeof(cmp_buf), &cmp_len,
&try_exact, oid_idx, oid_idx_len);
if (!res)
/* Bad conversion */
return NULL;
if (cmp_len != ISIS_SYS_ID_LEN) {
/* We do not have valid index oids */
memset(cmp_buf, 0, sizeof(cmp_buf));
cmp_level = 0;
} else if (try_exact)
/*
* We have no valid level index.
* Let start from non-existing level 0 and
* hence not need to do exact match
*/
cmp_level = 0;
else if (oid_idx_len < (ISIS_SYS_ID_LEN + 2))
cmp_level = 0;
else if (oid_idx[ISIS_SYS_ID_LEN + 1] <= IS_LEVEL_2)
cmp_level = (int)oid_idx[ISIS_SYS_ID_LEN + 1];
else
/*
* Any value greater than 2 will have the same result
* but we can have integer overflows, hence 3 is a reasonable
* choice
*/
cmp_level = (int)(IS_LEVEL_2 + 1);
dyn = dynhn_snmp_next(isis, cmp_buf, cmp_level);
if (dyn == NULL)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = ISIS_SYS_ID_LEN;
for (off = 0; off < ISIS_SYS_ID_LEN; off++)
name[v->namelen + 1 + off] = dyn->id[off];
name[v->namelen + 1 + ISIS_SYS_ID_LEN] = (oid)dyn->level;
/* Set length */
*length = v->namelen + 1 + ISIS_SYS_ID_LEN + 1;
switch (v->magic) {
case ISIS_ROUTER_HOSTNAME:
*var_len = strlen(dyn->hostname);
return (uint8_t *)dyn->hostname;
case ISIS_ROUTER_ID:
/* It seems that we do no know router-id in lsps */
return SNMP_INTEGER(0);
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_sys_level(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
oid *oid_idx;
size_t oid_idx_len;
int level;
int level_match;
struct isis_area *area = NULL;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL)
return NULL;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
if (oid_idx == NULL || oid_idx_len != 1)
return NULL;
if (oid_idx[0] == IS_LEVEL_1)
level = IS_LEVEL_1;
else if (oid_idx[0] == IS_LEVEL_2)
level = IS_LEVEL_2;
else
return NULL;
} else {
if (oid_idx == NULL)
level = IS_LEVEL_1;
else if (oid_idx_len == 0)
level = IS_LEVEL_1;
else if (oid_idx[0] < IS_LEVEL_1)
level = IS_LEVEL_1;
else if (oid_idx[0] < IS_LEVEL_2)
level = IS_LEVEL_2;
else
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = level;
/* Set length */
*length = v->namelen + 1;
}
area = NULL;
if (!list_isempty(isis->area_list))
area = listgetdata(listhead(isis->area_list));
level_match = 0;
if (area != NULL)
level_match = isis_snmp_get_level_match(area->is_type, level);
switch (v->magic) {
case ISIS_SYSLEVEL_ORIGLSPBUFFSIZE:
if (level_match)
return SNMP_INTEGER(area->lsp_mtu);
return SNMP_INTEGER(DEFAULT_LSP_MTU);
case ISIS_SYSLEVEL_MINLSPGENINT:
if (level_match)
return SNMP_INTEGER(area->lsp_gen_interval[level - 1]);
else
return SNMP_INTEGER(DEFAULT_MIN_LSP_GEN_INTERVAL);
case ISIS_SYSLEVEL_STATE:
if (level_match) {
if (area->overload_bit)
return SNMP_INTEGER(
ISIS_SNMP_LEVEL_STATE_OVERLOADED);
return SNMP_INTEGER(ISIS_SNMP_LEVEL_STATE_ON);
}
return SNMP_INTEGER(ISIS_SNMP_LEVEL_STATE_OFF);
case ISIS_SYSLEVEL_SETOVERLOAD:
if (level_match && area->overload_bit)
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_TRUE);
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_FALSE);
case ISIS_SYSLEVEL_SETOVERLOADUNTIL:
/* We do not have automatic cleanup of overload bit */
return SNMP_INTEGER(0);
case ISIS_SYSLEVEL_METRICSTYLE:
if (level_match) {
if (area->newmetric && area->oldmetric)
return SNMP_INTEGER(
ISIS_SNMP_METRIC_STYLE_BOTH);
if (area->newmetric)
return SNMP_INTEGER(
ISIS_SNMP_METRIC_STYLE_WIDE);
return SNMP_INTEGER(ISIS_SNMP_METRIC_STYLE_NARROW);
}
return SNMP_INTEGER(ISIS_SNMP_METRIC_STYLE_NARROW);
case ISIS_SYSLEVEL_SPFCONSIDERS:
return SNMP_INTEGER(ISIS_SNMP_METRIC_STYLE_BOTH);
case ISIS_SYSLEVEL_TEENABLED:
if (level_match && IS_MPLS_TE(area->mta))
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_TRUE);
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_FALSE);
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_system_counter(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
oid *oid_idx;
size_t oid_idx_len;
int level;
int level_match;
struct isis_area *area = NULL;
uint32_t val;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL)
return NULL;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
if (oid_idx == NULL || oid_idx_len != 1)
return 0;
if (oid_idx[0] == IS_LEVEL_1)
level = IS_LEVEL_1;
else if (oid_idx[0] == IS_LEVEL_2)
level = IS_LEVEL_2;
else
return NULL;
} else {
if (oid_idx == NULL)
level = IS_LEVEL_1;
else if (oid_idx_len == 0)
level = IS_LEVEL_1;
else if (oid_idx[0] < IS_LEVEL_1)
level = IS_LEVEL_1;
else if (oid_idx[0] < IS_LEVEL_2)
level = IS_LEVEL_2;
else
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = level;
/* Set length */
*length = v->namelen + 1;
}
area = NULL;
if (!list_isempty(isis->area_list))
area = listgetdata(listhead(isis->area_list));
level_match = 0;
if (area != NULL)
level_match = isis_snmp_get_level_match(area->is_type, level);
if (!level_match)
/* If level does not match all counters are zeros */
return SNMP_INTEGER(0);
switch (v->magic) {
case ISIS_SYSSTAT_CORRLSPS:
val = 0;
break;
case ISIS_SYSSTAT_AUTHTYPEFAILS:
val = (uint32_t)area->auth_type_failures[level - 1];
break;
case ISIS_SYSSTAT_AUTHFAILS:
val = (uint32_t)area->auth_failures[level - 1];
break;
case ISIS_SYSSTAT_LSPDBASEOLOADS:
val = area->overload_counter;
break;
case ISIS_SYSSTAT_MANADDRDROPFROMAREAS:
/* We do not support manual addresses */
val = 0;
break;
case ISIS_SYSSTAT_ATTMPTTOEXMAXSEQNUMS:
val = area->lsp_exceeded_max_counter;
break;
case ISIS_SYSSTAT_SEQNUMSKIPS:
val = area->lsp_seqno_skipped_counter;
break;
case ISIS_SYSSTAT_OWNLSPPURGES:
if (!area->purge_originator)
val = 0;
else
val = area->lsp_purge_count[level - 1];
break;
case ISIS_SYSSTAT_IDFIELDLENMISMATCHES:
val = (uint32_t)area->id_len_mismatches[level - 1];
break;
case ISIS_SYSSTAT_PARTCHANGES:
/* Not supported */
val = 0;
break;
case ISIS_SYSSTAT_SPFRUNS:
val = (uint32_t)area->spf_run_count[level - 1];
break;
case ISIS_SYSSTAT_LSPERRORS:
val = (uint32_t)area->lsp_error_counter[level - 1];
break;
default:
return NULL;
}
return SNMP_INTEGER(val);
}
static uint8_t *isis_snmp_find_next_circ_index(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
/* Check whether the instance identifier is valid */
if (smux_header_generic(v, name, length, exact, var_len, write_method)
== MATCH_FAILED)
return NULL;
switch (v->magic) {
case ISIS_NEXTCIRC_INDEX:
/*
* We do not support circuit creation through snmp
*/
return SNMP_INTEGER(0);
default:
break;
}
return 0;
}
static uint8_t *isis_snmp_find_circ(struct variable *v, oid *name,
size_t *length, int exact, size_t *var_len,
WriteMethod **write_method)
{
/* Index is circuit-id: 1-255 */
oid *oid_idx;
size_t oid_idx_len;
struct isis_circuit *circuit;
uint32_t up_ticks;
uint32_t delta_ticks;
time_t now_time;
int res;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_circuit_lookup_exact(oid_idx, oid_idx_len,
&circuit);
if (!res || oid_idx_len != 1)
return NULL;
} else {
res = isis_snmp_circuit_lookup_next(oid_idx, oid_idx_len,
&circuit);
if (!res)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = circuit->snmp_id;
/* Set length */
*length = v->namelen + 1;
}
switch (v->magic) {
case ISIS_CIRC_IFINDEX:
if (circuit->interface == NULL)
return SNMP_INTEGER(0);
return SNMP_INTEGER(circuit->interface->ifindex);
case ISIS_CIRC_ADMINSTATE:
return SNMP_INTEGER(ISIS_SNMP_ADMIN_STATE_ON);
case ISIS_CIRC_EXISTSTATE:
return SNMP_INTEGER(ISIS_SNMP_ROW_STATUS_ACTIVE);
case ISIS_CIRC_TYPE:
/*
* Note: values do not match 100%:
*
* 1. From isis_circuit.h:
* CIRCUIT_T_UNKNOWN 0
* CIRCUIT_T_BROADCAST 1
* CIRCUIT_T_P2P 2
* CIRCUIT_T_LOOPBACK 3
*
* 2. From rfc:
* broadcast(1),
* ptToPt(2),
* staticIn(3),
* staticOut(4),
*/
return SNMP_INTEGER(circuit->circ_type);
case ISIS_CIRC_EXTDOMAIN:
if (circuit->ext_domain)
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_TRUE);
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_FALSE);
case ISIS_CIRC_LEVELTYPE:
return SNMP_INTEGER(circuit->is_type);
case ISIS_CIRC_PASSIVECIRCUIT:
if (circuit->is_passive)
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_TRUE);
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_FALSE);
case ISIS_CIRC_MESHGROUPENABLED:
/* Not supported */
return SNMP_INTEGER(ISIS_SNMP_MESH_GROUP_INACTIVE);
case ISIS_CIRC_MESHGROUP:
/* Not supported */
return SNMP_INTEGER(0);
case ISIS_CIRC_SMALLHELLOS:
/*
* return false if lan hellos must be padded
*/
if (circuit->pad_hellos == ISIS_HELLO_PADDING_ALWAYS ||
(circuit->pad_hellos ==
ISIS_HELLO_PADDING_DURING_ADJACENCY_FORMATION &&
circuit->upadjcount[0] + circuit->upadjcount[1] == 0))
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_FALSE);
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_TRUE);
case ISIS_CIRC_LASTUPTIME:
if (circuit->last_uptime == 0)
return SNMP_INTEGER(0);
up_ticks = (uint32_t)netsnmp_get_agent_uptime();
now_time = time(NULL);
if (circuit->last_uptime >= now_time)
return SNMP_INTEGER(up_ticks);
delta_ticks = (now_time - circuit->last_uptime) * 10;
if (up_ticks < delta_ticks)
return SNMP_INTEGER(up_ticks);
return SNMP_INTEGER(up_ticks - delta_ticks);
case ISIS_CIRC_3WAYENABLED:
/* Not supported */
return SNMP_INTEGER(ISIS_SNMP_TRUTH_VALUE_FALSE);
case ISIS_CIRC_EXTENDEDCIRCID:
/* Used for 3-way hand shake only */
return SNMP_INTEGER(0);
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_circ_level(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
static uint8_t circuit_id_val[ISIS_SYS_ID_LEN + 1];
/* Index is circuit-id: 1-255 + level: 1-2 */
oid *oid_idx;
size_t oid_idx_len;
int res;
struct isis_circuit *circuit;
int level;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL)
return NULL;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_circuit_level_lookup_exact(oid_idx, oid_idx_len,
1, &circuit, &level);
if (!res || oid_idx_len != 2)
return NULL;
} else {
res = isis_snmp_circuit_level_lookup_next(oid_idx, oid_idx_len,
1, &circuit, &level);
if (!res)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = circuit->snmp_id;
name[v->namelen + 1] = level;
/* Set length */
*length = v->namelen + 2;
}
switch (v->magic) {
case ISIS_CIRCLEVEL_METRIC:
return SNMP_INTEGER(circuit->metric[level - 1]);
case ISIS_CIRCLEVEL_WIDEMETRIC:
if (circuit->area == NULL || !circuit->area->newmetric) {
/* What should we do if wide metric is not supported? */
return SNMP_INTEGER(0);
}
return SNMP_INTEGER(circuit->te_metric[level - 1]);
case ISIS_CIRCLEVEL_ISPRIORITY:
return SNMP_INTEGER(circuit->priority[level - 1]);
case ISIS_CIRCLEVEL_IDOCTET:
return SNMP_INTEGER(circuit->circuit_id);
case ISIS_CIRCLEVEL_ID:
if (circuit->circ_type != CIRCUIT_T_P2P) {
/*
* Unless it is point-to-point circuit, the value is and
* empty octet string
*/
*var_len = 0;
return circuit_id_val;
}
/* !!!!!! Circuit-id is zero for p2p links */
if (circuit->u.p2p.neighbor == NULL
|| circuit->u.p2p.neighbor->adj_state != ISIS_ADJ_UP) {
/* No adjacency or adjacency not fully up yet */
memcpy(circuit_id_val, isis->sysid, ISIS_SYS_ID_LEN);
circuit_id_val[ISIS_SYS_ID_LEN] = circuit->circuit_id;
*var_len = ISIS_SYS_ID_LEN + 1;
return circuit_id_val;
}
/* Adjacency fully-up */
memcpy(circuit_id_val, circuit->u.p2p.neighbor->sysid,
ISIS_SYS_ID_LEN);
circuit_id_val[ISIS_SYS_ID_LEN] = 0;
*var_len = ISIS_SYS_ID_LEN + 1;
return circuit_id_val;
case ISIS_CIRCLEVEL_DESIS:
if (circuit->circ_type != CIRCUIT_T_BROADCAST
|| !circuit->u.bc.is_dr[level - 1]) {
/*
* Unless it is lan circuit participating in dis process
* the value is an empty octet string
*/
*var_len = 0;
return circuit_id_val;
}
*var_len = ISIS_SYS_ID_LEN + 1;
if (level == IS_LEVEL_1)
return circuit->u.bc.l1_desig_is;
return circuit->u.bc.l2_desig_is;
case ISIS_CIRCLEVEL_HELLOMULTIPLIER:
return SNMP_INTEGER(circuit->hello_multiplier[level - 1]);
case ISIS_CIRCLEVEL_HELLOTIMER:
return SNMP_INTEGER(circuit->hello_interval[level - 1] * 1000);
case ISIS_CIRCLEVEL_DRHELLOTIMER:
return SNMP_INTEGER(circuit->hello_interval[level - 1] * 1000);
case ISIS_CIRCLEVEL_LSPTHROTTLE:
if (circuit->area)
return SNMP_INTEGER(
circuit->area->min_spf_interval[level - 1]
* 1000);
else
return SNMP_INTEGER(0);
case ISIS_CIRCLEVEL_MINLSPRETRANSINT:
if (circuit->area)
return SNMP_INTEGER(
circuit->area->min_spf_interval[level - 1]);
else
return SNMP_INTEGER(0);
case ISIS_CIRCLEVEL_CSNPINTERVAL:
return SNMP_INTEGER(circuit->csnp_interval[level - 1]);
case ISIS_CIRCLEVEL_PARTSNPINTERVAL:
return SNMP_INTEGER(circuit->psnp_interval[level - 1]);
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_circ_counter(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
/* Index circuit-id 1-255 + level */
oid *oid_idx;
size_t oid_idx_len;
int res;
struct isis_circuit *circuit;
int level;
uint32_t val = 0;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_circuit_level_lookup_exact(oid_idx, oid_idx_len,
1, &circuit, &level);
if (!res || oid_idx_len != 2)
return NULL;
} else {
res = isis_snmp_circuit_level_lookup_next(oid_idx, oid_idx_len,
1, &circuit, &level);
if (!res)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = circuit->snmp_id;
if (circuit->circ_type == CIRCUIT_T_P2P)
name[v->namelen + 1] = ISIS_SNMP_P2P_CIRCUIT;
else
name[v->namelen + 1] = level;
/* Set length */
*length = v->namelen + 2;
}
switch (v->magic) {
case ISIS_CIRC_ADJCHANGES:
val = circuit->adj_state_changes;
break;
case ISIS_CIRC_NUMADJ:
if (circuit->circ_type == CIRCUIT_T_P2P) {
val = circuit->u.p2p.neighbor == NULL ? 0 : 1;
break;
}
if (circuit->circ_type != CIRCUIT_T_BROADCAST) {
val = 0;
break;
}
if (level == IS_LEVEL_1) {
if (circuit->u.bc.adjdb[0] == NULL)
val = 0;
else
val = listcount(circuit->u.bc.adjdb[0]);
break;
}
if (circuit->u.bc.adjdb[1] == NULL)
val = 0;
else
val = listcount(circuit->u.bc.adjdb[1]);
break;
case ISIS_CIRC_INITFAILS:
val = circuit->init_failures; /* counter never incremented */
break;
case ISIS_CIRC_REJADJS:
val = circuit->rej_adjacencies;
break;
case ISIS_CIRC_IDFIELDLENMISMATCHES:
val = circuit->id_len_mismatches;
break;
case ISIS_CIRC_MAXAREAADDRMISMATCHES:
val = circuit->max_area_addr_mismatches;
break;
case ISIS_CIRC_AUTHTYPEFAILS:
val = circuit->auth_type_failures;
break;
case ISIS_CIRC_AUTHFAILS:
val = circuit->auth_failures;
break;
case ISIS_CIRC_LANDESISCHANGES:
if (circuit->circ_type == CIRCUIT_T_P2P)
val = 0;
else
val = circuit->desig_changes[level - 1];
break;
default:
return NULL;
}
return SNMP_INTEGER(val);
}
static uint8_t *isis_snmp_find_isadj(struct variable *v, oid *name,
size_t *length, int exact, size_t *var_len,
WriteMethod **write_method)
{
/* Index is circuit-id: 1-255 + adj-id: 1-... */
oid *oid_idx;
size_t oid_idx_len;
int res;
time_t val;
struct isis_adjacency *adj;
uint32_t up_ticks;
uint32_t delta_ticks;
time_t now_time;
/* Ring buffer to print SNPA */
#define FORMAT_BUF_COUNT 4
static char snpa[FORMAT_BUF_COUNT][ISO_SYSID_STRLEN];
static size_t cur_buf = 0;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_adj_lookup_exact(oid_idx, oid_idx_len,
ISIS_SNMP_ADJ_DATA_NONE, &adj,
NULL, NULL, NULL);
if (!res || oid_idx_len != 2)
return NULL;
} else {
res = isis_snmp_adj_lookup_next(oid_idx, oid_idx_len,
ISIS_SNMP_ADJ_DATA_NONE, &adj,
NULL, NULL, NULL);
if (!res)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = adj->circuit->snmp_id;
name[v->namelen + 1] = adj->snmp_idx;
/* Set length */
*length = v->namelen + 2;
}
switch (v->magic) {
case ISIS_ISADJ_STATE:
return SNMP_INTEGER(isis_snmp_adj_state(adj->adj_state));
case ISIS_ISADJ_3WAYSTATE:
return SNMP_INTEGER(adj->threeway_state);
case ISIS_ISADJ_NEIGHSNPAADDRESS: {
cur_buf = (cur_buf + 1) % FORMAT_BUF_COUNT;
snprintfrr(snpa[cur_buf], ISO_SYSID_STRLEN, "%pSY", adj->snpa);
*var_len = strlen(snpa[cur_buf]);
return (uint8_t *)snpa[cur_buf];
}
case ISIS_ISADJ_NEIGHSYSTYPE:
return SNMP_INTEGER(isis_snmp_adj_neightype(adj->sys_type));
case ISIS_ISADJ_NEIGHSYSID:
*var_len = sizeof(adj->sysid);
return adj->sysid;
case ISIS_ISADJ_NBREXTENDEDCIRCID:
return SNMP_INTEGER(adj->ext_circuit_id != 0 ? 1 : 0);
case ISIS_ISADJ_USAGE:
/* It seems that no value conversion is required */
return SNMP_INTEGER(adj->adj_usage);
case ISIS_ISADJ_HOLDTIMER:
/*
* It seems that we want remaining timer
*/
if (adj->last_upd != 0) {
val = time(NULL);
if (val < (adj->last_upd + adj->hold_time))
return SNMP_INTEGER(adj->last_upd
+ adj->hold_time - val);
}
/* Not running or just expired */
return SNMP_INTEGER(0);
case ISIS_ISADJ_NEIGHPRIORITY:
return SNMP_INTEGER(adj->prio[adj->level - 1]);
case ISIS_ISADJ_LASTUPTIME:
if (adj->flaps == 0)
return SNMP_INTEGER(0);
up_ticks = (uint32_t)netsnmp_get_agent_uptime();
now_time = time(NULL);
if (adj->last_flap >= now_time)
return SNMP_INTEGER(up_ticks);
delta_ticks = (now_time - adj->last_flap) * 10;
if (up_ticks < delta_ticks)
return SNMP_INTEGER(up_ticks);
return SNMP_INTEGER(up_ticks - delta_ticks);
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_isadj_area(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
/* Index circuit-id: 1-255 + adj-id: 1-... */
oid *oid_idx;
size_t oid_idx_len;
int res;
struct isis_adjacency *adj;
oid data_idx;
uint8_t *data;
size_t data_len;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_adj_lookup_exact(oid_idx, oid_idx_len,
ISIS_SNMP_ADJ_DATA_AREA_ADDR,
&adj, NULL, &data, &data_len);
if (!res || oid_idx_len != 3)
return NULL;
} else {
res = isis_snmp_adj_lookup_next(
oid_idx, oid_idx_len, ISIS_SNMP_ADJ_DATA_AREA_ADDR,
&adj, &data_idx, &data, &data_len);
if (!res)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = adj->circuit->snmp_id;
name[v->namelen + 1] = adj->snmp_idx;
name[v->namelen + 2] = data_idx;
/* Set length */
*length = v->namelen + 3;
}
switch (v->magic) {
case ISIS_ISADJAREA_ADDRESS:
*var_len = data_len;
return data;
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_isadj_ipaddr(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
/* Index circuit-id 1-255 + adj-id 1-... */
oid *oid_idx;
size_t oid_idx_len;
int res;
struct isis_adjacency *adj;
oid data_idx;
uint8_t *data;
size_t data_len;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_adj_lookup_exact(oid_idx, oid_idx_len,
ISIS_SNMP_ADJ_DATA_IP_ADDR,
&adj, NULL, &data, &data_len);
if (!res || oid_idx_len != 3)
return NULL;
} else {
res = isis_snmp_adj_lookup_next(
oid_idx, oid_idx_len, ISIS_SNMP_ADJ_DATA_IP_ADDR, &adj,
&data_idx, &data, &data_len);
if (!res)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = adj->circuit->snmp_id;
name[v->namelen + 1] = adj->snmp_idx;
name[v->namelen + 2] = data_idx;
/* Set length */
*length = v->namelen + 3;
}
switch (v->magic) {
case ISIS_ISADJIPADDR_TYPE:
if (data_len == 4)
return SNMP_INTEGER(ISIS_SNMP_INET_TYPE_V4);
return SNMP_INTEGER(ISIS_SNMP_INET_TYPE_V6);
case ISIS_ISADJIPADDR_ADDRESS:
*var_len = data_len;
return data;
default:
break;
}
return NULL;
}
static uint8_t *isis_snmp_find_isadj_prot_supp(struct variable *v, oid *name,
size_t *length, int exact,
size_t *var_len,
WriteMethod **write_method)
{
/* Index circuit-id 1-255 + adj-id 1-... */
oid *oid_idx;
size_t oid_idx_len;
int res;
struct isis_adjacency *adj;
oid data_idx;
uint8_t *data;
size_t data_len;
*write_method = NULL;
if (*length <= v->namelen) {
oid_idx = NULL;
oid_idx_len = 0;
} else if (memcmp(name, v->name, v->namelen * sizeof(oid)) != 0) {
oid_idx = NULL;
oid_idx_len = 0;
} else {
oid_idx = name + v->namelen;
oid_idx_len = *length - v->namelen;
}
if (exact) {
res = isis_snmp_adj_lookup_exact(oid_idx, oid_idx_len,
ISIS_SNMP_ADJ_DATA_PROTO, &adj,
NULL, &data, &data_len);
if (!res || oid_idx_len != 3)
return NULL;
} else {
res = isis_snmp_adj_lookup_next(oid_idx, oid_idx_len,
ISIS_SNMP_ADJ_DATA_PROTO, &adj,
&data_idx, &data, &data_len);
if (!res)
return NULL;
/* Copy the name out */
memcpy(name, v->name, v->namelen * sizeof(oid));
/* Append index */
name[v->namelen] = adj->circuit->snmp_id;
name[v->namelen + 1] = adj->snmp_idx;
name[v->namelen + 2] = data_idx;
/* Set length */
*length = v->namelen + 3;
}
switch (v->magic) {
case ISIS_ISADJPROTSUPP_PROTOCOL:
return SNMP_INTEGER(*data);
default:
break;
}
return NULL;
}
/* Register ISIS-MIB. */
static int isis_snmp_init(struct event_loop *tm)
{
struct isis_func_to_prefix *h2f = isis_func_to_prefix_arr;
struct variable *v;
for (size_t off = 0; off < isis_var_count; off++) {
v = &isis_var_arr[off];
if (v->findVar != h2f->ihtp_func) {
/* Next table */
h2f++;
assert(h2f < (isis_func_to_prefix_arr
+ isis_func_to_prefix_count));
assert(v->findVar == h2f->ihtp_func);
}
v->namelen = h2f->ihtp_pref_len + 1;
memcpy(v->name, h2f->ihtp_pref_oid,
h2f->ihtp_pref_len * sizeof(oid));
v->name[h2f->ihtp_pref_len] = v->magic;
}
smux_init(tm);
REGISTER_MIB("mibII/isis", isis_var_arr, variable, isis_oid);
return 0;
}
Merging upstream version 10.2. Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:17:20 +01:00
static int isis_snmp_terminate(void)
{
smux_terminate();
return 0;
}
Adding upstream version 10.1.1. Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:03:58 +01:00
/*
* ISIS notification functions: we have one function per notification
*/
static int isis_snmp_trap_throttle(oid trap_id)
{
time_t time_now;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL || !isis->snmp_notifications || !smux_enabled())
return 0;
time_now = time(NULL);
if ((isis_snmp_trap_timestamp[trap_id] + 5) > time_now)
/* Throttle trap rate at 1 in 5 secs */
return 0;
isis_snmp_trap_timestamp[trap_id] = time_now;
return 1;
}
static int isis_snmp_db_overload_update(const struct isis_area *area)
{
netsnmp_variable_list *notification_vars;
long val;
uint32_t off;
if (!isis_snmp_trap_throttle(ISIS_TRAP_DB_OVERLOAD))
return 0;
notification_vars = NULL;
/* Put in trap value */
snmp_varlist_add_variable(&notification_vars, isis_snmp_trap_var,
array_size(isis_snmp_trap_var), ASN_OBJECT_ID,
(uint8_t *)&isis_snmp_trap_val_db_overload,
sizeof(isis_snmp_trap_val_db_overload));
/* Prepare data */
val = area->is_type;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_sys_level_index,
array_size(isis_snmp_trap_data_var_sys_level_index), INTEGER,
(uint8_t *)&val, sizeof(val));
/* Patch sys_level_state with proper index */
off = array_size(isis_snmp_trap_data_var_sys_level_state) - 1;
isis_snmp_trap_data_var_sys_level_state[off] = val;
/* Prepare data */
if (area->overload_bit)
val = ISIS_SNMP_LEVEL_STATE_OVERLOADED;
else
val = ISIS_SNMP_LEVEL_STATE_ON;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_sys_level_state,
array_size(isis_snmp_trap_data_var_sys_level_state), INTEGER,
(uint8_t *)&val, sizeof(val));
send_v2trap(notification_vars);
snmp_free_varbind(notification_vars);
smux_events_update();
return 0;
}
static int isis_snmp_lsp_exceed_max_update(const struct isis_area *area,
const uint8_t *lsp_id)
{
netsnmp_variable_list *notification_vars;
long val;
if (!isis_snmp_trap_throttle(ISIS_TRAP_LSP_EXCEED_MAX))
return 0;
notification_vars = NULL;
/* Put in trap value */
snmp_varlist_add_variable(&notification_vars, isis_snmp_trap_var,
array_size(isis_snmp_trap_var), ASN_OBJECT_ID,
(uint8_t *)&isis_snmp_trap_val_lsp_exceed_max,
sizeof(isis_snmp_trap_val_lsp_exceed_max));
/* Prepare data */
val = area->is_type;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_sys_level_index,
array_size(isis_snmp_trap_data_var_sys_level_index), INTEGER,
(uint8_t *)&val, sizeof(val));
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_pdu_lsp_id,
array_size(isis_snmp_trap_data_var_pdu_lsp_id), STRING, lsp_id,
ISIS_SYS_ID_LEN + 2);
send_v2trap(notification_vars);
snmp_free_varbind(notification_vars);
smux_events_update();
return 0;
}
/*
* A common function to handle popular combination of trap objects
* isisNotificationSysLevelIndex,
* optional-object-a
* isisNotificationCircIfIndex,
* optional-object-b
*/
static void isis_snmp_update_worker_a(const struct isis_circuit *circuit,
oid trap_id, const oid *oid_a,
size_t oid_a_len, uint8_t type_a,
const void *data_a, size_t data_a_len,
const oid *oid_b, size_t oid_b_len,
uint8_t type_b, const void *data_b,
size_t data_b_len)
{
netsnmp_variable_list *notification_vars = NULL;
oid var_name[MAX_OID_LEN];
size_t var_count;
long val;
/* Sanity */
if (trap_id != ISIS_TRAP_ID_LEN_MISMATCH
&& trap_id != ISIS_TRAP_MAX_AREA_ADDR_MISMATCH
&& trap_id != ISIS_TRAP_OWN_LSP_PURGE
&& trap_id != ISIS_TRAP_SEQNO_SKIPPED
&& trap_id != ISIS_TRAP_AUTHEN_TYPE_FAILURE
&& trap_id != ISIS_TRAP_AUTHEN_FAILURE
&& trap_id != ISIS_TRAP_REJ_ADJACENCY)
return;
/* Put in trap value */
memcpy(var_name, isis_snmp_notifications,
sizeof(isis_snmp_notifications));
var_count = array_size(isis_snmp_notifications);
var_name[var_count++] = trap_id;
/* Put in trap value */
snmp_varlist_add_variable(&notification_vars, isis_snmp_trap_var,
array_size(isis_snmp_trap_var), ASN_OBJECT_ID,
(uint8_t *)var_name, var_count * sizeof(oid));
val = circuit->is_type;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_sys_level_index,
array_size(isis_snmp_trap_data_var_sys_level_index), INTEGER,
(uint8_t *)&val, sizeof(val));
if (oid_a_len != 0) {
if (oid_a == NULL || data_a == NULL || data_a_len == 0)
return;
snmp_varlist_add_variable(&notification_vars, oid_a, oid_a_len,
type_a, (uint8_t *)data_a,
data_a_len);
}
if (circuit->interface == NULL)
val = 0;
else
val = circuit->interface->ifindex;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_circ_if_index,
array_size(isis_snmp_trap_data_var_circ_if_index), UNSIGNED32,
(uint8_t *)&val, sizeof(val));
if (oid_b_len != 0) {
if (oid_b == NULL || data_b == NULL || data_b_len == 0)
return;
snmp_varlist_add_variable(&notification_vars, oid_b, oid_b_len,
type_b, (uint8_t *)data_b,
data_b_len);
}
send_v2trap(notification_vars);
snmp_free_varbind(notification_vars);
smux_events_update();
}
/*
* A common function to handle popular combination of trap objects
* isisNotificationSysLevelIndex,
* isisNotificationCircIfIndex,
* optional-var-a
* optional-var-b
*
* Note: the only difference with worker_a is order of circ-if-index vs
* optional-var-a
*/
static void isis_snmp_update_worker_b(const struct isis_circuit *circuit,
oid trap_id, const oid *oid_a,
size_t oid_a_len, uint8_t type_a,
const void *data_a, size_t data_a_len,
const oid *oid_b, size_t oid_b_len,
uint8_t type_b, const void *data_b,
size_t data_b_len)
{
netsnmp_variable_list *notification_vars = NULL;
oid var_name[MAX_OID_LEN];
size_t var_count;
long val;
/* Sanity */
if (trap_id != ISIS_TRAP_VERSION_SKEW
&& trap_id != ISIS_TRAP_LSP_TOO_LARGE
&& trap_id != ISIS_TRAP_ADJ_STATE_CHANGE)
return;
/* Put in trap value */
memcpy(var_name, isis_snmp_notifications,
sizeof(isis_snmp_notifications));
var_count = array_size(isis_snmp_notifications);
var_name[var_count++] = trap_id;
/* Put in trap value */
snmp_varlist_add_variable(&notification_vars, isis_snmp_trap_var,
array_size(isis_snmp_trap_var), ASN_OBJECT_ID,
(uint8_t *)var_name, var_count * sizeof(oid));
val = circuit->is_type;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_sys_level_index,
array_size(isis_snmp_trap_data_var_sys_level_index), INTEGER,
(uint8_t *)&val, sizeof(val));
if (circuit->interface == NULL)
val = 0;
else
val = circuit->interface->ifindex;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_circ_if_index,
array_size(isis_snmp_trap_data_var_circ_if_index), UNSIGNED32,
(uint8_t *)&val, sizeof(val));
if (oid_a_len != 0) {
if (oid_a == NULL || data_a == NULL || data_a_len == 0)
return;
snmp_varlist_add_variable(&notification_vars, oid_a, oid_a_len,
type_a, (uint8_t *)data_a,
data_a_len);
}
if (oid_b_len != 0) {
if (oid_b == NULL || data_b == NULL || data_b_len == 0)
return;
snmp_varlist_add_variable(&notification_vars, oid_b, oid_b_len,
type_b, (uint8_t *)data_b,
data_b_len);
}
send_v2trap(notification_vars);
snmp_free_varbind(notification_vars);
smux_events_update();
}
static int isis_snmp_id_len_mismatch_update(const struct isis_circuit *circuit,
uint8_t rcv_id, const char *raw_pdu,
size_t raw_pdu_len)
{
long val;
if (!isis_snmp_trap_throttle(ISIS_TRAP_ID_LEN_MISMATCH))
return 0;
val = rcv_id;
if (raw_pdu_len > ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN)
raw_pdu_len = ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN;
isis_snmp_update_worker_a(
circuit, ISIS_TRAP_ID_LEN_MISMATCH,
isis_snmp_trap_data_var_pdu_field_len,
array_size(isis_snmp_trap_data_var_pdu_field_len), UNSIGNED32,
&val, sizeof(val), isis_snmp_trap_data_var_pdu_fragment,
array_size(isis_snmp_trap_data_var_pdu_fragment), STRING,
raw_pdu, raw_pdu_len);
return 0;
}
static int
isis_snmp_max_area_addr_mismatch_update(const struct isis_circuit *circuit,
uint8_t max_addrs, const char *raw_pdu,
size_t raw_pdu_len)
{
long val;
if (!isis_snmp_trap_throttle(ISIS_TRAP_MAX_AREA_ADDR_MISMATCH))
return 0;
val = max_addrs;
if (raw_pdu_len > ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN)
raw_pdu_len = ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN;
isis_snmp_update_worker_a(
circuit, ISIS_TRAP_MAX_AREA_ADDR_MISMATCH,
isis_snmp_trap_data_var_pdu_max_area_addr,
array_size(isis_snmp_trap_data_var_pdu_max_area_addr),
UNSIGNED32, &val, sizeof(val),
isis_snmp_trap_data_var_pdu_fragment,
array_size(isis_snmp_trap_data_var_pdu_fragment), STRING,
raw_pdu, raw_pdu_len);
return 0;
}
static int isis_snmp_own_lsp_purge_update(const struct isis_circuit *circuit,
const uint8_t *lsp_id)
{
if (!isis_snmp_trap_throttle(ISIS_TRAP_OWN_LSP_PURGE))
return 0;
isis_snmp_update_worker_a(
circuit, ISIS_TRAP_OWN_LSP_PURGE, NULL, 0, STRING, NULL, 0,
isis_snmp_trap_data_var_pdu_lsp_id,
array_size(isis_snmp_trap_data_var_pdu_lsp_id), STRING, lsp_id,
ISIS_SYS_ID_LEN + 2);
return 0;
}
static int isis_snmp_seqno_skipped_update(const struct isis_circuit *circuit,
const uint8_t *lsp_id)
{
if (!isis_snmp_trap_throttle(ISIS_TRAP_SEQNO_SKIPPED))
return 0;
isis_snmp_update_worker_a(
circuit, ISIS_TRAP_SEQNO_SKIPPED, NULL, 0, STRING, NULL, 0,
isis_snmp_trap_data_var_pdu_lsp_id,
array_size(isis_snmp_trap_data_var_pdu_lsp_id), STRING, lsp_id,
ISIS_SYS_ID_LEN + 2);
return 0;
}
static int
isis_snmp_authentication_type_failure_update(const struct isis_circuit *circuit,
const char *raw_pdu,
size_t raw_pdu_len)
{
if (!isis_snmp_trap_throttle(ISIS_TRAP_AUTHEN_TYPE_FAILURE))
return 0;
if (raw_pdu_len > ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN)
raw_pdu_len = ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN;
isis_snmp_update_worker_a(
circuit, ISIS_TRAP_AUTHEN_TYPE_FAILURE, NULL, 0, STRING, NULL,
0, isis_snmp_trap_data_var_pdu_fragment,
array_size(isis_snmp_trap_data_var_pdu_fragment), STRING,
raw_pdu, raw_pdu_len);
return 0;
}
static int
isis_snmp_authentication_failure_update(const struct isis_circuit *circuit,
char const *raw_pdu, size_t raw_pdu_len)
{
if (!isis_snmp_trap_throttle(ISIS_TRAP_AUTHEN_FAILURE))
return 0;
if (raw_pdu_len > ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN)
raw_pdu_len = ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN;
isis_snmp_update_worker_a(
circuit, ISIS_TRAP_AUTHEN_FAILURE, NULL, 0, STRING, NULL, 0,
isis_snmp_trap_data_var_pdu_fragment,
array_size(isis_snmp_trap_data_var_pdu_fragment), STRING,
raw_pdu, raw_pdu_len);
return 0;
}
static int isis_snmp_version_skew_update(const struct isis_circuit *circuit,
uint8_t version, const char *raw_pdu,
size_t raw_pdu_len)
{
long val;
if (!isis_snmp_trap_throttle(ISIS_TRAP_VERSION_SKEW))
return 0;
val = version;
if (raw_pdu_len > ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN)
raw_pdu_len = ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN;
isis_snmp_update_worker_b(
circuit, ISIS_TRAP_VERSION_SKEW,
isis_snmp_trap_data_var_pdu_proto_ver,
array_size(isis_snmp_trap_data_var_pdu_proto_ver), UNSIGNED32,
&val, sizeof(val), isis_snmp_trap_data_var_pdu_fragment,
array_size(isis_snmp_trap_data_var_pdu_fragment), STRING,
raw_pdu, raw_pdu_len);
return 0;
}
static int isis_snmp_area_mismatch_update(const struct isis_circuit *circuit,
const char *raw_pdu,
size_t raw_pdu_len)
{
/*
* This is a special case because
* it does not include isisNotificationSysLevelIndex
*/
netsnmp_variable_list *notification_vars;
long val;
if (!isis_snmp_trap_throttle(ISIS_TRAP_AREA_MISMATCH))
return 0;
notification_vars = NULL;
/* Put in trap value */
snmp_varlist_add_variable(&notification_vars, isis_snmp_trap_var,
array_size(isis_snmp_trap_var), ASN_OBJECT_ID,
(uint8_t *)&isis_snmp_trap_val_area_mismatch,
sizeof(isis_snmp_trap_val_area_mismatch));
if (circuit->interface == NULL)
val = 0;
else
val = circuit->interface->ifindex;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_circ_if_index,
array_size(isis_snmp_trap_data_var_circ_if_index), UNSIGNED32,
(uint8_t *)&val, sizeof(val));
if (raw_pdu_len > ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN)
raw_pdu_len = ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_pdu_fragment,
array_size(isis_snmp_trap_data_var_pdu_fragment), STRING,
raw_pdu, raw_pdu_len);
send_v2trap(notification_vars);
snmp_free_varbind(notification_vars);
smux_events_update();
return 0;
}
static int isis_snmp_reject_adjacency_update(const struct isis_circuit *circuit,
const char *raw_pdu,
size_t raw_pdu_len)
{
if (!isis_snmp_trap_throttle(ISIS_TRAP_REJ_ADJACENCY))
return 0;
if (raw_pdu_len > ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN)
raw_pdu_len = ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN;
isis_snmp_update_worker_a(
circuit, ISIS_TRAP_REJ_ADJACENCY, NULL, 0, STRING, NULL, 0,
isis_snmp_trap_data_var_pdu_fragment,
array_size(isis_snmp_trap_data_var_pdu_fragment), STRING,
raw_pdu, raw_pdu_len);
return 0;
}
static int isis_snmp_lsp_too_large_update(const struct isis_circuit *circuit,
uint32_t pdu_size,
const uint8_t *lsp_id)
{
if (!isis_snmp_trap_throttle(ISIS_TRAP_LSP_TOO_LARGE))
return 0;
isis_snmp_update_worker_b(
circuit, ISIS_TRAP_LSP_TOO_LARGE,
isis_snmp_trap_data_var_pdu_lsp_size,
array_size(isis_snmp_trap_data_var_pdu_lsp_size), UNSIGNED32,
&pdu_size, sizeof(pdu_size), isis_snmp_trap_data_var_pdu_lsp_id,
array_size(isis_snmp_trap_data_var_pdu_lsp_id), STRING, lsp_id,
ISIS_SYS_ID_LEN + 2);
return 0;
}
static int isis_snmp_adj_state_change_update(const struct isis_adjacency *adj)
{
uint8_t lsp_id[ISIS_SYS_ID_LEN + 2];
long val;
struct isis *isis = isis_lookup_by_vrfid(VRF_DEFAULT);
if (isis == NULL || !isis->snmp_notifications || !smux_enabled())
return 0;
/* Prepare data */
memcpy(lsp_id, adj->sysid, ISIS_SYS_ID_LEN);
lsp_id[ISIS_SYS_ID_LEN] = 0;
lsp_id[ISIS_SYS_ID_LEN + 1] = 0;
val = isis_snmp_adj_state(adj->adj_state);
isis_snmp_update_worker_b(
adj->circuit, ISIS_TRAP_ADJ_STATE_CHANGE,
isis_snmp_trap_data_var_pdu_lsp_id,
array_size(isis_snmp_trap_data_var_pdu_lsp_id), STRING, lsp_id,
ISIS_SYS_ID_LEN + 2, isis_snmp_trap_data_var_adj_state,
array_size(isis_snmp_trap_data_var_adj_state), INTEGER, &val,
sizeof(val));
return 0;
}
static int isis_snmp_lsp_error_update(const struct isis_circuit *circuit,
const uint8_t *lsp_id,
char const *raw_pdu, size_t raw_pdu_len)
{
/*
* This is a special case because
* it have more variables
*/
netsnmp_variable_list *notification_vars;
long val;
if (!isis_snmp_trap_throttle(ISIS_TRAP_LSP_ERROR))
return 0;
notification_vars = NULL;
/* Put in trap value */
snmp_varlist_add_variable(&notification_vars, isis_snmp_trap_var,
array_size(isis_snmp_trap_var), ASN_OBJECT_ID,
(uint8_t *)&isis_snmp_trap_val_lsp_error,
sizeof(isis_snmp_trap_val_lsp_error));
/* Prepare data */
val = circuit->is_type;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_sys_level_index,
array_size(isis_snmp_trap_data_var_sys_level_index), INTEGER,
(uint8_t *)&val, sizeof(val));
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_pdu_lsp_id,
array_size(isis_snmp_trap_data_var_pdu_lsp_id), STRING, lsp_id,
ISIS_SYS_ID_LEN + 2);
/* Prepare data */
if (circuit->interface == NULL)
val = 0;
else
val = circuit->interface->ifindex;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_circ_if_index,
array_size(isis_snmp_trap_data_var_circ_if_index), UNSIGNED32,
(uint8_t *)&val, sizeof(val));
/* Prepare data */
if (raw_pdu_len > ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN)
raw_pdu_len = ISIS_SNMP_TRAP_PDU_FRAGMENT_MAX_LEN;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_pdu_fragment,
array_size(isis_snmp_trap_data_var_pdu_fragment), STRING,
raw_pdu, raw_pdu_len);
/* Prepare data */
val = 0;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_error_offset,
array_size(isis_snmp_trap_data_var_error_offset), UNSIGNED32,
(uint8_t *)&val, sizeof(val));
/* Prepare data */
val = 0;
snmp_varlist_add_variable(
&notification_vars, isis_snmp_trap_data_var_error_tlv_type,
array_size(isis_snmp_trap_data_var_error_tlv_type), UNSIGNED32,
(uint8_t *)&val, sizeof(val));
send_v2trap(notification_vars);
snmp_free_varbind(notification_vars);
smux_events_update();
return 0;
}
static int isis_snmp_module_init(void)
{
hook_register(isis_hook_db_overload, isis_snmp_db_overload_update);
hook_register(isis_hook_lsp_exceed_max,
isis_snmp_lsp_exceed_max_update);
hook_register(isis_hook_id_len_mismatch,
isis_snmp_id_len_mismatch_update);
hook_register(isis_hook_max_area_addr_mismatch,
isis_snmp_max_area_addr_mismatch_update);
hook_register(isis_hook_own_lsp_purge, isis_snmp_own_lsp_purge_update);
hook_register(isis_hook_seqno_skipped, isis_snmp_seqno_skipped_update);
hook_register(isis_hook_authentication_type_failure,
isis_snmp_authentication_type_failure_update);
hook_register(isis_hook_authentication_failure,
isis_snmp_authentication_failure_update);
hook_register(isis_hook_version_skew, isis_snmp_version_skew_update);
hook_register(isis_hook_area_mismatch, isis_snmp_area_mismatch_update);
hook_register(isis_hook_reject_adjacency,
isis_snmp_reject_adjacency_update);
hook_register(isis_hook_lsp_too_large, isis_snmp_lsp_too_large_update);
hook_register(isis_hook_adj_state_change,
isis_snmp_adj_state_change_update);
hook_register(isis_hook_lsp_error, isis_snmp_lsp_error_update);
hook_register(isis_circuit_new_hook, isis_circuit_snmp_id_gen);
hook_register(isis_circuit_del_hook, isis_circuit_snmp_id_free);
hook_register(frr_late_init, isis_snmp_init);
Merging upstream version 10.2. Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:17:20 +01:00
hook_register(frr_fini, isis_snmp_terminate);
Adding upstream version 10.1.1. Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:03:58 +01:00
return 0;
}
FRR_MODULE_SETUP(
.name = "isis_snmp",
.version = FRR_VERSION,
.description = "isis AgentX SNMP module",
.init = isis_snmp_module_init,
);
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