/*
* Copyright (c) 2001-2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* All rights reserved.
*
* Author: Harti Brandt <harti@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Begemot: bsnmp/snmpd/snmpd.h,v 1.24 2004/08/06 08:47:13 brandt Exp $
*
* Private SNMPd data and functions.
*/
#ifdef USE_LIBBEGEMOT
#include <rpoll.h>
#else
#include <isc/eventlib.h>
#endif
#define PATH_SYSCONFIG "/etc:/usr/etc:/usr/local/etc"
#ifdef USE_LIBBEGEMOT
#define evTimerID int
#define evFileID int
#endif
/*************************************************************
*
* Communities
*/
struct community {
struct lmodule *owner; /* who created the community */
u_int private;/* private name for the module */
u_int value; /* value of this community */
u_char * string; /* the community string */
const u_char * descr; /* description */
TAILQ_ENTRY(community) link;
struct asn_oid index;
};
/* list of all known communities */
extern TAILQ_HEAD(community_list, community) community_list;
/*************************************************************
*
* Request IDs.
*/
struct idrange {
u_int type; /* type id */
int32_t base; /* base of this range */
int32_t size; /* size of this range */
int32_t next; /* generator */
struct lmodule *owner; /* owner module */
TAILQ_ENTRY(idrange) link;
};
/* list of all known ranges */
extern TAILQ_HEAD(idrange_list, idrange) idrange_list;
/* identifier generator */
extern u_int next_idrange;
/* request id generator for traps */
extern u_int trap_reqid;
/*************************************************************
*
* Timers
*/
struct timer {
void (*func)(void *);/* user function */
void *udata; /* user data */
evTimerID id; /* timer id */
struct lmodule *owner; /* owner of the timer */
LIST_ENTRY(timer) link;
};
/* list of all current timers */
extern LIST_HEAD(timer_list, timer) timer_list;
/*************************************************************
*
* File descriptors
*/
struct fdesc {
int fd; /* the file descriptor */
void (*func)(int, void *);/* user function */
void *udata; /* user data */
evFileID id; /* file id */
struct lmodule *owner; /* owner module of the file */
LIST_ENTRY(fdesc) link;
};
/* list of all current selected files */
extern LIST_HEAD(fdesc_list, fdesc) fdesc_list;
/*************************************************************
*
* Loadable modules
*/
# define LM_SECTION_MAX 14
struct lmodule {
char section[LM_SECTION_MAX + 1]; /* and index */
char *path;
u_int flags;
void *handle;
const struct snmp_module *config;
TAILQ_ENTRY(lmodule) link;
TAILQ_ENTRY(lmodule) start;
struct asn_oid index;
};
#define LM_STARTED 0x0001
#define LM_ONSTARTLIST 0x0002
extern TAILQ_HEAD(lmodules, lmodule) lmodules;
struct lmodule *lm_load(const char *, const char *);
void lm_unload(struct lmodule *);
void lm_start(struct lmodule *);
/*************************************************************
*
* SNMP ports
*/
/*
* Common input stuff
*/
struct port_input {
int fd; /* socket */
void *id; /* evSelect handle */
int stream : 1; /* stream socket */
int cred : 1; /* want credentials */
struct sockaddr *peer; /* last received packet */
socklen_t peerlen;
int priv : 1; /* peer is privileged */
u_char *buf; /* receive buffer */
size_t buflen; /* buffer length */
size_t length; /* received length */
size_t consumed; /* how many bytes used */
};
struct tport {
struct asn_oid index; /* table index of this tp point */
TAILQ_ENTRY(tport) link; /* table link */
struct transport *transport; /* who handles this */
};
TAILQ_HEAD(tport_list, tport);
int snmpd_input(struct port_input *, struct tport *);
void snmpd_input_close(struct port_input *);
/*
* Transport domain
*/
#define TRANS_NAMELEN 64
struct transport_def {
const char *name; /* name of this transport */
struct asn_oid id; /* OBJID of this transport */
int (*start)(void);
int (*stop)(int);
void (*close_port)(struct tport *);
int (*init_port)(struct tport *);
ssize_t (*send)(struct tport *, const u_char *, size_t,
const struct sockaddr *, size_t);
ssize_t (*recv)(struct tport *, struct port_input *);
};
struct transport {
struct asn_oid index; /* transport table index */
TAILQ_ENTRY(transport) link; /* ... and link */
u_int or_index; /* registration index */
struct tport_list table; /* list of open ports */
const struct transport_def *vtab;
};
TAILQ_HEAD(transport_list, transport);
extern struct transport_list transport_list;
void trans_insert_port(struct transport *, struct tport *);
void trans_remove_port(struct tport *);
struct tport *trans_find_port(struct transport *,
const struct asn_oid *, u_int);
struct tport *trans_next_port(struct transport *,
const struct asn_oid *, u_int);
struct tport *trans_first_port(struct transport *);
struct tport *trans_iter_port(struct transport *,
int (*)(struct tport *, intptr_t), intptr_t);
int trans_register(const struct transport_def *, struct transport **);
int trans_unregister(struct transport *);
/*************************************************************
*
* SNMPd scalar configuration.
*/
struct snmpd {
/* transmit buffer size */
u_int32_t txbuf;
/* receive buffer size */
u_int32_t rxbuf;
/* disable community table */
int comm_dis;
/* authentication traps */
int auth_traps;
/* source address for V1 traps */
u_char trap1addr[4];
/* version enable flags */
uint32_t version_enable;
};
extern struct snmpd snmpd;
#define VERS_ENABLE_V1 0x00000001
#define VERS_ENABLE_V2C 0x00000002
#define VERS_ENABLE_V3 0x00000004
#define VERS_ENABLE_ALL (VERS_ENABLE_V1 | VERS_ENABLE_V2C | VERS_ENABLE_V3)
/*
* The debug group
*/
struct debug {
u_int dump_pdus;
u_int logpri;
u_int evdebug;
};
extern struct debug debug;
/*
* SNMPd statistics table
*/
struct snmpd_stats {
u_int32_t inPkts; /* total packets received */
u_int32_t inBadVersions; /* unknown version number */
u_int32_t inASNParseErrs; /* fatal parse errors */
u_int32_t inBadCommunityNames;
u_int32_t inBadCommunityUses;
u_int32_t proxyDrops; /* dropped by proxy function */
u_int32_t silentDrops;
u_int32_t inBadPduTypes;
u_int32_t inTooLong;
u_int32_t noTxbuf;
u_int32_t noRxbuf;
};
extern struct snmpd_stats snmpd_stats;
/*
* SNMPd Engine
*/
extern struct snmp_engine snmpd_engine;
/*
* OR Table
*/
struct objres {
TAILQ_ENTRY(objres) link;
u_int index;
struct asn_oid oid; /* the resource OID */
char descr[256];
u_int32_t uptime;
struct lmodule *module;
};
TAILQ_HEAD(objres_list, objres);
extern struct objres_list objres_list;
/*
* Trap Sink Table
*/
struct trapsink {
TAILQ_ENTRY(trapsink) link;
struct asn_oid index;
u_int status;
int socket;
u_char comm[SNMP_COMMUNITY_MAXLEN + 1];
int version;
};
enum {
TRAPSINK_ACTIVE = 1,
TRAPSINK_NOT_IN_SERVICE = 2,
TRAPSINK_NOT_READY = 3,
TRAPSINK_DESTROY = 6,
TRAPSINK_V1 = 1,
TRAPSINK_V2 = 2,
};
TAILQ_HEAD(trapsink_list, trapsink);
extern struct trapsink_list trapsink_list;
extern const char *syspath;
/* snmpSerialNo */
extern int32_t snmp_serial_no;
int init_actvals(void);
extern char engine_file[];
int init_snmpd_engine(void);
int set_snmpd_engine(void);
void update_snmpd_engine_time(void);
int read_config(const char *, struct lmodule *);
int define_macro(const char *name, const char *value);
#define LOG_ASN1_ERRORS 0x10000000
#define LOG_SNMP_ERRORS 0x20000000