File: //usr/local/ssl/include/net-snmp/library/snmp_api.h
/* Portions of this file are subject to the following copyright(s). See
* the Net-SNMP's COPYING file for more details and other copyrights
* that may apply:
*/
/*
* Portions of this file are copyrighted by:
* Copyright © 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms specified in the COPYING file
* distributed with the Net-SNMP package.
*/
#ifndef SNMP_API_H
#define SNMP_API_H
/*
* @file snmp_api.h - API for access to snmp.
*
* @addtogroup library
*
* Caution: when using this library in a multi-threaded application,
* the values of global variables "snmp_errno" and "snmp_detail"
* cannot be reliably determined. Suggest using snmp_error()
* to obtain the library error codes.
*
* @{
*/
#ifndef DONT_SHARE_ERROR_WITH_OTHER_THREADS
#define SET_SNMP_ERROR(x) snmp_errno=(x)
#else
#define SET_SNMP_ERROR(x)
#endif
#ifdef __cplusplus
extern "C" {
#endif
/***********************************************************
Copyright 1989 by Carnegie Mellon University
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of CMU not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
******************************************************************/
/** @typedef struct variable_list netsnmp_variable_list
* Typedefs the variable_list struct into netsnmp_variable_list */
struct variable_list;
typedef struct variable_list netsnmp_variable_list;
struct timeval;
struct netsnmp_transport_s;
#define USM_AUTH_KU_LEN 32
#define USM_PRIV_KU_LEN 32
/** @typedef struct snmp_pdu to netsnmp_pdu
* Typedefs the snmp_pdu struct into netsnmp_pdu */
/** @struct snmp_pdu
* The snmp protocol data unit.
*/
typedef struct snmp_pdu {
/*
* Protocol-version independent fields
*/
/** snmp version */
long version;
/** Type of this PDU */
int command;
/** Request id - note: not incremented on retries */
long reqid;
/** Message id for V3 messages note: incremented for each retry */
long msgid;
/** Unique ID for incoming transactions */
long transid;
/** Session id for AgentX messages */
long sessid;
/** Error status (non_repeaters in GetBulk) */
long errstat;
/** Error index (max_repetitions in GetBulk) */
long errindex;
/** Uptime */
u_long time;
u_long flags;
int securityModel;
/** noAuthNoPriv, authNoPriv, authPriv */
int securityLevel;
int msgParseModel;
/**
* Transport-specific opaque data. This replaces the IP-centric address
* field.
*/
void *transport_data;
int transport_data_length;
/**
* The actual transport domain. This SHOULD NOT BE FREE()D.
*/
const oid *tDomain;
size_t tDomainLen;
netsnmp_variable_list *variables;
/*
* SNMPv1 & SNMPv2c fields
*/
/** community for outgoing requests. */
u_char *community;
/** length of community name. */
size_t community_len;
/*
* Trap information
*/
/** System OID */
oid *enterprise;
size_t enterprise_length;
/** trap type */
long trap_type;
/** specific type */
long specific_type;
/** This is ONLY used for v1 TRAPs */
unsigned char agent_addr[4];
/*
* SNMPv3 fields
*/
/** context snmpEngineID */
u_char *contextEngineID;
/** Length of contextEngineID */
size_t contextEngineIDLen;
/** authoritative contextName */
char *contextName;
/** Length of contextName */
size_t contextNameLen;
/** authoritative snmpEngineID for security */
u_char *securityEngineID;
/** Length of securityEngineID */
size_t securityEngineIDLen;
/** on behalf of this principal */
char *securityName;
/** Length of securityName. */
size_t securityNameLen;
/*
* AgentX fields
* (also uses SNMPv1 community field)
*/
int priority;
int range_subid;
void *securityStateRef;
} netsnmp_pdu;
struct snmp_session;
/** @typedef struct snmp_session netsnmp_session
* Typedefs the snmp_session struct intonetsnmp_session */
typedef struct snmp_session netsnmp_session;
typedef int (*snmp_callback) (int, netsnmp_session *, int,
netsnmp_pdu *, void *);
typedef int (*netsnmp_callback) (int, netsnmp_session *, int,
netsnmp_pdu *, void *);
/** @struct snmp_session
* The snmp session structure.
*/
struct snmp_session {
/*
* Protocol-version independent fields
*/
/** snmp version */
long version;
/** Number of retries before timeout. */
int retries;
/** Number of uS until first timeout, then exponential backoff */
long timeout;
u_long flags;
struct snmp_session *subsession;
struct snmp_session *next;
/** name or address of default peer (may include transport specifier and/or port number) */
char *peername;
/** UDP port number of peer. (NO LONGER USED - USE peername INSTEAD) */
u_short remote_port;
/** My Domain name or dotted IP address, 0 for default */
char *localname;
/** My UDP port number, 0 for default, picked randomly */
u_short local_port;
/**
* Authentication function or NULL if null authentication is used
*/
u_char *(*authenticator) (u_char *, size_t *, u_char *, size_t);
/** Function to interpret incoming data */
netsnmp_callback callback;
/**
* Pointer to data that the callback function may consider important
*/
void *callback_magic;
/** copy of system errno */
int s_errno;
/** copy of library errno */
int s_snmp_errno;
/** Session id - AgentX only */
long sessid;
/*
* SNMPv1 & SNMPv2c fields
*/
/** community for outgoing requests. */
u_char *community;
/** Length of community name. */
size_t community_len;
/** Largest message to try to receive. */
size_t rcvMsgMaxSize;
/** Largest message to try to send. */
size_t sndMsgMaxSize;
/*
* SNMPv3 fields
*/
/** are we the authoritative engine? */
u_char isAuthoritative;
/** authoritative snmpEngineID */
u_char *contextEngineID;
/** Length of contextEngineID */
size_t contextEngineIDLen;
/** initial engineBoots for remote engine */
u_int engineBoots;
/** initial engineTime for remote engine */
u_int engineTime;
/** authoritative contextName */
char *contextName;
/** Length of contextName */
size_t contextNameLen;
/** authoritative snmpEngineID */
u_char *securityEngineID;
/** Length of contextEngineID */
size_t securityEngineIDLen;
/** on behalf of this principal */
char *securityName;
/** Length of securityName. */
size_t securityNameLen;
/** auth protocol oid */
oid *securityAuthProto;
/** Length of auth protocol oid */
size_t securityAuthProtoLen;
/** Ku for auth protocol XXX */
u_char securityAuthKey[USM_AUTH_KU_LEN];
/** Length of Ku for auth protocol */
size_t securityAuthKeyLen;
/** Kul for auth protocol */
u_char *securityAuthLocalKey;
/** Length of Kul for auth protocol XXX */
size_t securityAuthLocalKeyLen;
/** priv protocol oid */
oid *securityPrivProto;
/** Length of priv protocol oid */
size_t securityPrivProtoLen;
/** Ku for privacy protocol XXX */
u_char securityPrivKey[USM_PRIV_KU_LEN];
/** Length of Ku for priv protocol */
size_t securityPrivKeyLen;
/** Kul for priv protocol */
u_char *securityPrivLocalKey;
/** Length of Kul for priv protocol XXX */
size_t securityPrivLocalKeyLen;
/** snmp security model, v1, v2c, usm */
int securityModel;
/** noAuthNoPriv, authNoPriv, authPriv */
int securityLevel;
/** target param name */
char *paramName;
/**
* security module specific
*/
void *securityInfo;
/**
* use as you want data
*
* used by 'SNMP_FLAGS_RESP_CALLBACK' handling in the agent
* XXX: or should we add a new field into this structure?
*/
void *myvoid;
};
/*
* A list of all the outstanding requests for a particular session.
*/
#ifdef SNMP_NEED_REQUEST_LIST
typedef struct request_list {
struct request_list *next_request;
long request_id; /* request id */
long message_id; /* message id */
netsnmp_callback callback; /* user callback per request (NULL if unused) */
void *cb_data; /* user callback data per request (NULL if unused) */
int retries; /* Number of retries */
u_long timeout; /* length to wait for timeout */
struct timeval time; /* Time this request was made */
struct timeval expire; /* time this request is due to expire */
struct snmp_session *session;
netsnmp_pdu *pdu; /* The pdu for this request
* (saved so it can be retransmitted */
} netsnmp_request_list;
#endif /* SNMP_NEED_REQUEST_LIST */
/*
* Set fields in session and pdu to the following to get a default or unconfigured value.
*/
#define SNMP_DEFAULT_COMMUNITY_LEN 0 /* to get a default community name */
#define SNMP_DEFAULT_RETRIES -1
#define SNMP_DEFAULT_TIMEOUT -1
#define SNMP_DEFAULT_REMPORT 0
#define SNMP_DEFAULT_REQID -1
#define SNMP_DEFAULT_MSGID -1
#define SNMP_DEFAULT_ERRSTAT -1
#define SNMP_DEFAULT_ERRINDEX -1
#define SNMP_DEFAULT_ADDRESS 0
#define SNMP_DEFAULT_PEERNAME NULL
#define SNMP_DEFAULT_ENTERPRISE_LENGTH 0
#define SNMP_DEFAULT_TIME 0
#define SNMP_DEFAULT_VERSION -1
#define SNMP_DEFAULT_SECMODEL -1
#define SNMP_DEFAULT_CONTEXT ""
#ifndef DISABLE_MD5
#define SNMP_DEFAULT_AUTH_PROTO usmHMACMD5AuthProtocol
#else
#define SNMP_DEFAULT_AUTH_PROTO usmHMACSHA1AuthProtocol
#endif
#define SNMP_DEFAULT_AUTH_PROTOLEN USM_LENGTH_OID_TRANSFORM
#ifndef DISABLE_DES
#define SNMP_DEFAULT_PRIV_PROTO usmDESPrivProtocol
#else
#define SNMP_DEFAULT_PRIV_PROTO usmAESPrivProtocol
#endif
#define SNMP_DEFAULT_PRIV_PROTOLEN USM_LENGTH_OID_TRANSFORM
extern const char *snmp_api_errstring(int);
extern void snmp_perror(const char *);
extern void snmp_set_detail(const char *);
#define SNMP_MAX_MSG_SIZE 1472 /* ethernet MTU minus IP/UDP header */
#define SNMP_MAX_MSG_V3_HDRS (4+3+4+7+7+3+7+16) /* fudge factor=16 */
#define SNMP_MAX_ENG_SIZE 32
#define SNMP_MAX_SEC_NAME_SIZE 256
#define SNMP_MAX_CONTEXT_SIZE 256
#define SNMP_SEC_PARAM_BUF_SIZE 256
/*
* set to one to ignore unauthenticated Reports
*/
#define SNMPV3_IGNORE_UNAUTH_REPORTS 0
/*
* authoritative engine definitions
*/
#define SNMP_SESS_NONAUTHORITATIVE 0 /* should be 0 to default to this */
#define SNMP_SESS_AUTHORITATIVE 1 /* don't learn engineIDs */
#define SNMP_SESS_UNKNOWNAUTH 2 /* sometimes (like NRs) */
/*
* to determine type of Report from varbind_list
*/
#define REPORT_STATS_LEN 9
#define REPORT_snmpUnknownSecurityModels_NUM 1
#define REPORT_snmpInvalidMsgs_NUM 2
#define REPORT_usmStatsUnsupportedSecLevels_NUM 1
#define REPORT_usmStatsNotInTimeWindows_NUM 2
#define REPORT_usmStatsUnknownUserNames_NUM 3
#define REPORT_usmStatsUnknownEngineIDs_NUM 4
#define REPORT_usmStatsWrongDigests_NUM 5
#define REPORT_usmStatsDecryptionErrors_NUM 6
#define SNMP_DETAIL_SIZE 512
#define SNMP_FLAGS_RESP_CALLBACK 0x400 /* Additional callback on response */
#define SNMP_FLAGS_USER_CREATED 0x200 /* USM user has been created */
#define SNMP_FLAGS_DONT_PROBE 0x100 /* don't probe for an engineID */
#define SNMP_FLAGS_STREAM_SOCKET 0x80
#define SNMP_FLAGS_LISTENING 0x40 /* Server stream sockets only */
#define SNMP_FLAGS_SUBSESSION 0x20
#define SNMP_FLAGS_STRIKE2 0x02
#define SNMP_FLAGS_STRIKE1 0x01
#define CLEAR_SNMP_STRIKE_FLAGS(x) \
x &= ~(SNMP_FLAGS_STRIKE2|SNMP_FLAGS_STRIKE1)
/*
* returns '1' if the session is to be regarded as dead,
* otherwise set the strike flags appropriately, and return 0
*/
#define SET_SNMP_STRIKE_FLAGS(x) \
(( x & SNMP_FLAGS_STRIKE2 ) ? 1 : \
((( x & SNMP_FLAGS_STRIKE1 ) ? ( x |= SNMP_FLAGS_STRIKE2 ) : \
( x |= SNMP_FLAGS_STRIKE1 )), \
0))
/*
* Error return values.
*
* SNMPERR_SUCCESS is the non-PDU "success" code.
*
* XXX These should be merged with SNMP_ERR_* defines and confined
* to values < 0. ???
*/
#define SNMPERR_SUCCESS (0) /* XXX Non-PDU "success" code. */
#define SNMPERR_GENERR (-1)
#define SNMPERR_BAD_LOCPORT (-2)
#define SNMPERR_BAD_ADDRESS (-3)
#define SNMPERR_BAD_SESSION (-4)
#define SNMPERR_TOO_LONG (-5)
#define SNMPERR_NO_SOCKET (-6)
#define SNMPERR_V2_IN_V1 (-7)
#define SNMPERR_V1_IN_V2 (-8)
#define SNMPERR_BAD_REPEATERS (-9)
#define SNMPERR_BAD_REPETITIONS (-10)
#define SNMPERR_BAD_ASN1_BUILD (-11)
#define SNMPERR_BAD_SENDTO (-12)
#define SNMPERR_BAD_PARSE (-13)
#define SNMPERR_BAD_VERSION (-14)
#define SNMPERR_BAD_SRC_PARTY (-15)
#define SNMPERR_BAD_DST_PARTY (-16)
#define SNMPERR_BAD_CONTEXT (-17)
#define SNMPERR_BAD_COMMUNITY (-18)
#define SNMPERR_NOAUTH_DESPRIV (-19)
#define SNMPERR_BAD_ACL (-20)
#define SNMPERR_BAD_PARTY (-21)
#define SNMPERR_ABORT (-22)
#define SNMPERR_UNKNOWN_PDU (-23)
#define SNMPERR_TIMEOUT (-24)
#define SNMPERR_BAD_RECVFROM (-25)
#define SNMPERR_BAD_ENG_ID (-26)
#define SNMPERR_BAD_SEC_NAME (-27)
#define SNMPERR_BAD_SEC_LEVEL (-28)
#define SNMPERR_ASN_PARSE_ERR (-29)
#define SNMPERR_UNKNOWN_SEC_MODEL (-30)
#define SNMPERR_INVALID_MSG (-31)
#define SNMPERR_UNKNOWN_ENG_ID (-32)
#define SNMPERR_UNKNOWN_USER_NAME (-33)
#define SNMPERR_UNSUPPORTED_SEC_LEVEL (-34)
#define SNMPERR_AUTHENTICATION_FAILURE (-35)
#define SNMPERR_NOT_IN_TIME_WINDOW (-36)
#define SNMPERR_DECRYPTION_ERR (-37)
#define SNMPERR_SC_GENERAL_FAILURE (-38)
#define SNMPERR_SC_NOT_CONFIGURED (-39)
#define SNMPERR_KT_NOT_AVAILABLE (-40)
#define SNMPERR_UNKNOWN_REPORT (-41)
#define SNMPERR_USM_GENERICERROR (-42)
#define SNMPERR_USM_UNKNOWNSECURITYNAME (-43)
#define SNMPERR_USM_UNSUPPORTEDSECURITYLEVEL (-44)
#define SNMPERR_USM_ENCRYPTIONERROR (-45)
#define SNMPERR_USM_AUTHENTICATIONFAILURE (-46)
#define SNMPERR_USM_PARSEERROR (-47)
#define SNMPERR_USM_UNKNOWNENGINEID (-48)
#define SNMPERR_USM_NOTINTIMEWINDOW (-49)
#define SNMPERR_USM_DECRYPTIONERROR (-50)
#define SNMPERR_NOMIB (-51)
#define SNMPERR_RANGE (-52)
#define SNMPERR_MAX_SUBID (-53)
#define SNMPERR_BAD_SUBID (-54)
#define SNMPERR_LONG_OID (-55)
#define SNMPERR_BAD_NAME (-56)
#define SNMPERR_VALUE (-57)
#define SNMPERR_UNKNOWN_OBJID (-58)
#define SNMPERR_NULL_PDU (-59)
#define SNMPERR_NO_VARS (-60)
#define SNMPERR_VAR_TYPE (-61)
#define SNMPERR_MALLOC (-62)
#define SNMPERR_KRB5 (-63)
#define SNMPERR_PROTOCOL (-64)
#define SNMPERR_MAX (-64)
#define non_repeaters errstat
#define max_repetitions errindex
typedef union {
long *integer;
u_char *string;
oid *objid;
u_char *bitstring;
struct counter64 *counter64;
#ifdef OPAQUE_SPECIAL_TYPES
float *floatVal;
double *doubleVal;
/*
* t_union *unionVal;
*/
#endif /* OPAQUE_SPECIAL_TYPES */
} netsnmp_vardata;
/** @struct variable_list
* The netsnmp variable list binding structure, it's typedef'd to
* netsnmp_variable_list.
*/
struct variable_list {
/** NULL for last variable */
struct variable_list *next_variable;
/** Object identifier of variable */
oid *name;
/** number of subid's in name */
size_t name_length;
/** ASN type of variable */
u_char type;
/** value of variable */
netsnmp_vardata val;
/** the length of the value to be copied into buf */
size_t val_len;
/** 90 percentile < 24. */
oid name_loc[MAX_OID_LEN];
/** 90 percentile < 40. */
u_char buf[40];
/** (Opaque) hook for additional data */
void *data;
/** callback to free above */
void (*dataFreeHook)(void *);
int index;
};
/*
* netsnmp_session *snmp_open(session)
* netsnmp_session *session;
*
* Sets up the session with the snmp_session information provided
* by the user. Then opens and binds the necessary UDP port.
* A handle to the created session is returned (this is different than
* the pointer passed to snmp_open()). On any error, NULL is returned
* and snmp_errno is set to the appropriate error code.
*/
netsnmp_session *snmp_open(netsnmp_session *);
/*
* int snmp_close(session)
* netsnmp_session *session;
*
* Close the input session. Frees all data allocated for the session,
* dequeues any pending requests, and closes any sockets allocated for
* the session. Returns 0 on error, 1 otherwise.
*
* snmp_close_sessions() does the same thing for all open sessions
*/
int snmp_close(netsnmp_session *);
int snmp_close_sessions(void);
/*
* int snmp_send(session, pdu)
* netsnmp_session *session;
* netsnmp_pdu *pdu;
*
* Sends the input pdu on the session after calling snmp_build to create
* a serialized packet. If necessary, set some of the pdu data from the
* session defaults. Add a request corresponding to this pdu to the list
* of outstanding requests on this session, then send the pdu.
* Returns the request id of the generated packet if applicable, otherwise 1.
* On any error, 0 is returned.
* The pdu is freed by snmp_send() unless a failure occured.
*/
int snmp_send(netsnmp_session *, netsnmp_pdu *);
/*
* int snmp_async_send(session, pdu, callback, cb_data)
* netsnmp_session *session;
* netsnmp_pdu *pdu;
* netsnmp_callback callback;
* void *cb_data;
*
* Sends the input pdu on the session after calling snmp_build to create
* a serialized packet. If necessary, set some of the pdu data from the
* session defaults. Add a request corresponding to this pdu to the list
* of outstanding requests on this session and store callback and data,
* then send the pdu.
* Returns the request id of the generated packet if applicable, otherwise 1.
* On any error, 0 is returned.
* The pdu is freed by snmp_send() unless a failure occured.
*/
int snmp_async_send(netsnmp_session *, netsnmp_pdu *,
netsnmp_callback, void *);
/*
* void snmp_read(fdset)
* fd_set *fdset;
*
* Checks to see if any of the fd's set in the fdset belong to
* snmp. Each socket with it's fd set has a packet read from it
* and snmp_parse is called on the packet received. The resulting pdu
* is passed to the callback routine for that session. If the callback
* routine returns successfully, the pdu and it's request are deleted.
*/
void snmp_read(fd_set *);
/*
* void
* snmp_free_pdu(pdu)
* netsnmp_pdu *pdu;
*
* Frees the pdu and any malloc'd data associated with it.
*/
void snmp_free_pdu(netsnmp_pdu *);
void snmp_free_var(netsnmp_variable_list *); /* frees just this one */
void snmp_free_varbind(netsnmp_variable_list * var); /* frees all in list */
/*
* int snmp_select_info(numfds, fdset, timeout, block)
* int *numfds;
* fd_set *fdset;
* struct timeval *timeout;
* int *block;
*
* Returns info about what snmp requires from a select statement.
* numfds is the number of fds in the list that are significant.
* All file descriptors opened for SNMP are OR'd into the fdset.
* If activity occurs on any of these file descriptors, snmp_read
* should be called with that file descriptor set.
*
* The timeout is the latest time that SNMP can wait for a timeout. The
* select should be done with the minimum time between timeout and any other
* timeouts necessary. This should be checked upon each invocation of select.
* If a timeout is received, snmp_timeout should be called to check if the
* timeout was for SNMP. (snmp_timeout is idempotent)
*
* Block is 1 if the select is requested to block indefinitely, rather than
* time out. If block is input as 1, the timeout value will be treated as
* undefined, but it must be available for setting in snmp_select_info. On
* return, if block is true, the value of timeout will be undefined.
*
* snmp_select_info returns the number of open sockets. (i.e. The number
* of sessions open)
*/
int snmp_select_info(int *, fd_set *, struct timeval *,
int *);
/*
* void snmp_timeout();
*
* snmp_timeout should be called whenever the timeout from snmp_select_info
* expires, but it is idempotent, so snmp_timeout can be polled (probably a
* cpu expensive proposition). snmp_timeout checks to see if any of the
* sessions have an outstanding request that has timed out. If it finds one
* (or more), and that pdu has more retries available, a new packet is formed
* from the pdu and is resent. If there are no more retries available, the
* callback for the session is used to alert the user of the timeout.
*/
void snmp_timeout(void);
/*
* This routine must be supplied by the application:
*
* u_char *authenticator(pdu, length, community, community_len)
* u_char *pdu; The rest of the PDU to be authenticated
* int *length; The length of the PDU (updated by the authenticator)
* u_char *community; The community name to authenticate under.
* int community_len The length of the community name.
*
* Returns the authenticated pdu, or NULL if authentication failed.
* If null authentication is used, the authenticator in snmp_session can be
* set to NULL(0).
*/
/*
* This routine must be supplied by the application:
*
* int callback(operation, session, reqid, pdu, magic)
* int operation;
* netsnmp_session *session; The session authenticated under.
* int reqid; The request id of this pdu (0 for TRAP)
* netsnmp_pdu *pdu; The pdu information.
* void *magic A link to the data for this routine.
*
* Returns 1 if request was successful, 0 if it should be kept pending.
* Any data in the pdu must be copied because it will be freed elsewhere.
* Operations are defined below:
*/
#define NETSNMP_CALLBACK_OP_RECEIVED_MESSAGE 1
#define NETSNMP_CALLBACK_OP_TIMED_OUT 2
#define NETSNMP_CALLBACK_OP_SEND_FAILED 3
#define NETSNMP_CALLBACK_OP_CONNECT 4
#define NETSNMP_CALLBACK_OP_DISCONNECT 5
long snmp_get_next_msgid(void);
long snmp_get_next_reqid(void);
long snmp_get_next_sessid(void);
long snmp_get_next_transid(void);
int snmp_oid_compare(const oid *, size_t, const oid *,
size_t);
int snmp_oid_ncompare(const oid *, size_t, const oid *,
size_t, size_t);
int snmp_oidtree_compare(const oid *, size_t, const oid *,
size_t);
int netsnmp_oid_compare_ll(const oid * in_name1,
size_t len1, const oid * in_name2,
size_t len2, size_t *offpt);
int netsnmp_oid_equals(const oid *, size_t, const oid *,
size_t);
int netsnmp_oid_tree_equals(const oid *, size_t, const oid *,
size_t);
int netsnmp_oid_is_subtree(const oid *, size_t, const oid *,
size_t);
int netsnmp_oid_find_prefix(const oid * in_name1, size_t len1,
const oid * in_name2, size_t len2);
void init_snmp(const char *);
u_char *snmp_pdu_build(netsnmp_pdu *, u_char *, size_t *);
#ifdef USE_REVERSE_ASNENCODING
u_char *snmp_pdu_rbuild(netsnmp_pdu *, u_char *, size_t *);
#endif
int snmpv3_parse(netsnmp_pdu *, u_char *, size_t *,
u_char **, netsnmp_session *);
int snmpv3_packet_build(netsnmp_session *,
netsnmp_pdu *pdu, u_char * packet,
size_t * out_length,
u_char * pdu_data,
size_t pdu_data_len);
int snmpv3_packet_rbuild(netsnmp_session *,
netsnmp_pdu *pdu, u_char * packet,
size_t * out_length,
u_char * pdu_data,
size_t pdu_data_len);
int snmpv3_make_report(netsnmp_pdu *pdu, int error);
int snmpv3_get_report_type(netsnmp_pdu *pdu);
int snmp_pdu_parse(netsnmp_pdu *pdu, u_char * data,
size_t * length);
u_char *snmpv3_scopedPDU_parse(netsnmp_pdu *pdu, u_char * cp,
size_t * length);
void snmp_store(const char *type);
void snmp_shutdown(const char *type);
netsnmp_variable_list *snmp_pdu_add_variable(netsnmp_pdu *, const oid *,
size_t, u_char, const u_char *,
size_t);
netsnmp_variable_list *snmp_varlist_add_variable(netsnmp_variable_list
** varlist,
const oid * name,
size_t name_length,
u_char type,
const u_char * value,
size_t len);
int snmp_add_var(netsnmp_pdu *, const oid *, size_t, char,
const char *);
oid *snmp_duplicate_objid(const oid * objToCopy, size_t);
u_int snmp_increment_statistic(int which);
u_int snmp_increment_statistic_by(int which, int count);
u_int snmp_get_statistic(int which);
void snmp_init_statistics(void);
int create_user_from_session(netsnmp_session * session);
int snmp_get_fd_for_session(struct snmp_session *sessp);
/*
* New re-allocating reverse encoding functions.
*/
#ifdef USE_REVERSE_ASNENCODING
int snmpv3_packet_realloc_rbuild(u_char ** pkt, size_t * pkt_len,
size_t * offset,
netsnmp_session * session,
netsnmp_pdu *pdu, u_char * pdu_data,
size_t pdu_data_len);
int snmp_pdu_realloc_rbuild(u_char ** pkt, size_t * pkt_len,
size_t * offset, netsnmp_pdu *pdu);
#endif
/*
* Extended open; fpre_parse has changed.
*/
netsnmp_session *snmp_open_ex(netsnmp_session *,
int (*fpre_parse) (netsnmp_session *,
struct
netsnmp_transport_s *,
void *, int),
int (*fparse) (netsnmp_session *,
netsnmp_pdu *, u_char *,
size_t),
int (*fpost_parse) (netsnmp_session *,
netsnmp_pdu *, int),
int (*fbuild) (netsnmp_session *,
netsnmp_pdu *, u_char *,
size_t *),
int (*frbuild) (netsnmp_session *,
netsnmp_pdu *, u_char **,
size_t *, size_t *),
int (*fcheck) (u_char *, size_t));
/*
* provided for backwards compatability. Don't use these functions.
* See snmp_debug.h and snmp_debug.c instead.
*/
void snmp_set_do_debugging(int);
int snmp_get_do_debugging(void);
/*
* snmp_error - return error data
* Inputs : address of errno, address of snmp_errno, address of string
* Caller must free the string returned after use.
*/
void snmp_error(netsnmp_session *, int *, int *, char **);
/*
* single session API.
*
* These functions perform similar actions as snmp_XX functions,
* but operate on a single session only.
*
* Synopsis:
void * sessp;
netsnmp_session session, *ss;
netsnmp_pdu *pdu, *response;
snmp_sess_init(&session);
session.retries = ...
session.remote_port = ...
sessp = snmp_sess_open(&session);
ss = snmp_sess_session(sessp);
if (ss == NULL)
exit(1);
...
if (ss->community) free(ss->community);
ss->community = strdup(gateway);
ss->community_len = strlen(gateway);
...
snmp_sess_synch_response(sessp, pdu, &response);
...
snmp_sess_close(sessp);
* See also:
* snmp_sess_synch_response, in snmp_client.h.
* Notes:
* 1. Invoke snmp_sess_session after snmp_sess_open.
* 2. snmp_sess_session return value is an opaque pointer.
* 3. Do NOT free memory returned by snmp_sess_session.
* 4. Replace snmp_send(ss,pdu) with snmp_sess_send(sessp,pdu)
*/
void snmp_sess_init(netsnmp_session *);
void *snmp_sess_open(netsnmp_session *);
void *snmp_sess_pointer(netsnmp_session *);
netsnmp_session *snmp_sess_session(void *);
/*
* Return the netsnmp_transport structure associated with the given opaque
* pointer.
*/
struct netsnmp_transport_s *snmp_sess_transport(void *);
void snmp_sess_transport_set(void *,
struct netsnmp_transport_s *);
/*
* EXPERIMENTAL API EXTENSIONS ------------------------------------------
*
* snmp_sess_add_ex, snmp_sess_add, snmp_add
*
* Analogous to snmp_open family of functions, but taking an
* netsnmp_transport pointer as an extra argument. Unlike snmp_open et
* al. it doesn't attempt to interpret the in_session->peername as a
* transport endpoint specifier, but instead uses the supplied transport.
* JBPN
*
*/
void *snmp_sess_add_ex(netsnmp_session *,
struct netsnmp_transport_s *,
int (*fpre_parse) (netsnmp_session *,
struct
netsnmp_transport_s
*, void *, int),
int (*fparse) (netsnmp_session *,
struct snmp_pdu *,
u_char *, size_t),
int (*fpost_parse) (netsnmp_session *,
struct snmp_pdu *,
int),
int (*fbuild) (netsnmp_session *,
struct snmp_pdu *,
u_char *, size_t *),
int (*frbuild) (netsnmp_session *,
struct snmp_pdu *,
u_char **, size_t *,
size_t *),
int (*fcheck) (u_char *, size_t),
netsnmp_pdu *(*fcreate_pdu) (struct
netsnmp_transport_s
*,
void *,
size_t));
void *snmp_sess_add(netsnmp_session *,
struct netsnmp_transport_s *,
int (*fpre_parse) (netsnmp_session *,
struct
netsnmp_transport_s *,
void *, int),
int (*fpost_parse) (netsnmp_session *,
netsnmp_pdu *, int));
netsnmp_session *snmp_add(netsnmp_session *,
struct netsnmp_transport_s *,
int (*fpre_parse) (netsnmp_session *,
struct netsnmp_transport_s
*, void *, int),
int (*fpost_parse) (netsnmp_session *,
netsnmp_pdu *, int));
netsnmp_session *snmp_add_full(netsnmp_session * in_session,
struct netsnmp_transport_s *transport,
int (*fpre_parse) (netsnmp_session *,
struct
netsnmp_transport_s
*, void *, int),
int (*fparse) (netsnmp_session *,
netsnmp_pdu *, u_char *,
size_t),
int (*fpost_parse) (netsnmp_session *,
netsnmp_pdu *, int),
int (*fbuild) (netsnmp_session *,
netsnmp_pdu *, u_char *,
size_t *),
int (*frbuild) (netsnmp_session *,
netsnmp_pdu *,
u_char **, size_t *,
size_t *),
int (*fcheck) (u_char *, size_t),
netsnmp_pdu *(*fcreate_pdu) (struct
netsnmp_transport_s
*, void *,
size_t)
);
/*
* use return value from snmp_sess_open as void * parameter
*/
int snmp_sess_send(void *, netsnmp_pdu *);
int snmp_sess_async_send(void *, netsnmp_pdu *,
netsnmp_callback, void *);
int snmp_sess_select_info(void *, int *, fd_set *,
struct timeval *, int *);
int snmp_sess_read(void *, fd_set *);
void snmp_sess_timeout(void *);
int snmp_sess_close(void *);
void snmp_sess_error(void *, int *, int *, char **);
void netsnmp_sess_log_error(int priority,
const char *prog_string,
netsnmp_session * ss);
void snmp_sess_perror(const char *prog_string,
netsnmp_session * ss);
const char * snmp_pdu_type(int type);
/*
* end single session API
*/
/*
* generic statistic counters
*/
/*
* snmpv3 statistics
*/
/*
* mpd stats
*/
#define STAT_SNMPUNKNOWNSECURITYMODELS 0
#define STAT_SNMPINVALIDMSGS 1
#define STAT_SNMPUNKNOWNPDUHANDLERS 2
#define STAT_MPD_STATS_START STAT_SNMPUNKNOWNSECURITYMODELS
#define STAT_MPD_STATS_END STAT_SNMPUNKNOWNPDUHANDLERS
/*
* usm stats
*/
#define STAT_USMSTATSUNSUPPORTEDSECLEVELS 3
#define STAT_USMSTATSNOTINTIMEWINDOWS 4
#define STAT_USMSTATSUNKNOWNUSERNAMES 5
#define STAT_USMSTATSUNKNOWNENGINEIDS 6
#define STAT_USMSTATSWRONGDIGESTS 7
#define STAT_USMSTATSDECRYPTIONERRORS 8
#define STAT_USM_STATS_START STAT_USMSTATSUNSUPPORTEDSECLEVELS
#define STAT_USM_STATS_END STAT_USMSTATSDECRYPTIONERRORS
/*
* snmp counters
*/
#define STAT_SNMPINPKTS 9
#define STAT_SNMPOUTPKTS 10
#define STAT_SNMPINBADVERSIONS 11
#define STAT_SNMPINBADCOMMUNITYNAMES 12
#define STAT_SNMPINBADCOMMUNITYUSES 13
#define STAT_SNMPINASNPARSEERRS 14
/*
* #define STAT_SNMPINBADTYPES 15
*/
#define STAT_SNMPINTOOBIGS 16
#define STAT_SNMPINNOSUCHNAMES 17
#define STAT_SNMPINBADVALUES 18
#define STAT_SNMPINREADONLYS 19
#define STAT_SNMPINGENERRS 20
#define STAT_SNMPINTOTALREQVARS 21
#define STAT_SNMPINTOTALSETVARS 22
#define STAT_SNMPINGETREQUESTS 23
#define STAT_SNMPINGETNEXTS 24
#define STAT_SNMPINSETREQUESTS 25
#define STAT_SNMPINGETRESPONSES 26
#define STAT_SNMPINTRAPS 27
#define STAT_SNMPOUTTOOBIGS 28
#define STAT_SNMPOUTNOSUCHNAMES 29
#define STAT_SNMPOUTBADVALUES 30
/*
* #define STAT_SNMPOUTREADONLYS 31
*/
#define STAT_SNMPOUTGENERRS 32
#define STAT_SNMPOUTGETREQUESTS 33
#define STAT_SNMPOUTGETNEXTS 34
#define STAT_SNMPOUTSETREQUESTS 35
#define STAT_SNMPOUTGETRESPONSES 36
#define STAT_SNMPOUTTRAPS 37
/*
* AUTHTRAPENABLE 38
*/
#define STAT_SNMPSILENTDROPS 39
#define STAT_SNMPPROXYDROPS 40
#define STAT_SNMP_STATS_START STAT_SNMPINPKTS
#define STAT_SNMP_STATS_END STAT_SNMPPROXYDROPS
/*
* target mib counters
*/
#define STAT_SNMPUNAVAILABLECONTEXTS 41
#define STAT_SNMPUNKNOWNCONTEXTS 42
#define STAT_TARGET_STATS_START STAT_SNMPUNAVAILABLECONTEXTS
#define STAT_TARGET_STATS_END STAT_SNMPUNKNOWNCONTEXTS
#define MAX_STATS 43
#ifdef __cplusplus
}
#endif
#endif /* SNMP_API_H */