1 //==========================================================================
3 // ./lib/current/include/snmp_api.h
6 //==========================================================================
7 //####ECOSGPLCOPYRIGHTBEGIN####
8 // -------------------------------------------
9 // This file is part of eCos, the Embedded Configurable Operating System.
10 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
12 // eCos is free software; you can redistribute it and/or modify it under
13 // the terms of the GNU General Public License as published by the Free
14 // Software Foundation; either version 2 or (at your option) any later version.
16 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
17 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 // You should have received a copy of the GNU General Public License along
22 // with eCos; if not, write to the Free Software Foundation, Inc.,
23 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25 // As a special exception, if other files instantiate templates or use macros
26 // or inline functions from this file, or you compile this file and link it
27 // with other works to produce a work based on this file, this file does not
28 // by itself cause the resulting work to be covered by the GNU General Public
29 // License. However the source code for this file must still be made available
30 // in accordance with section (3) of the GNU General Public License.
32 // This exception does not invalidate any other reasons why a work based on
33 // this file might be covered by the GNU General Public License.
35 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
36 // at http://sources.redhat.com/ecos/ecos-license/
37 // -------------------------------------------
38 //####ECOSGPLCOPYRIGHTEND####
39 //####UCDSNMPCOPYRIGHTBEGIN####
41 // -------------------------------------------
43 // Portions of this software may have been derived from the UCD-SNMP
44 // project, <http://ucd-snmp.ucdavis.edu/> from the University of
45 // California at Davis, which was originally based on the Carnegie Mellon
46 // University SNMP implementation. Portions of this software are therefore
47 // covered by the appropriate copyright disclaimers included herein.
49 // The release used was version 4.1.2 of May 2000. "ucd-snmp-4.1.2"
50 // -------------------------------------------
52 //####UCDSNMPCOPYRIGHTEND####
53 //==========================================================================
54 //#####DESCRIPTIONBEGIN####
59 // Purpose: Port of UCD-SNMP distribution to eCos.
63 //####DESCRIPTIONEND####
65 //==========================================================================
66 /********************************************************************
67 Copyright 1989, 1991, 1992 by Carnegie Mellon University
70 Copyright 1996, 1998, 1999, 2000 The Regents of the University of California
74 Permission to use, copy, modify and distribute this software and its
75 documentation for any purpose and without fee is hereby granted,
76 provided that the above copyright notice appears in all copies and
77 that both that copyright notice and this permission notice appear in
78 supporting documentation, and that the name of CMU and The Regents of
79 the University of California not be used in advertising or publicity
80 pertaining to distribution of the software without specific written
83 CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL
84 WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
85 WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL CMU OR
86 THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,
87 INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
88 FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
89 CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
90 CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
91 *********************************************************************/
96 * snmp_api.h - API for access to snmp.
98 * Caution: when using this library in a multi-threaded application,
99 * the values of global variables "snmp_errno" and "snmp_detail"
100 * cannot be reliably determined. Suggest using snmp_error()
101 * to obtain the library error codes.
104 #ifndef DONT_SHARE_ERROR_WITH_OTHER_THREADS
105 #define SET_SNMP_ERROR(x) snmp_errno=(x)
107 #define SET_SNMP_ERROR(x)
115 /***********************************************************
116 Copyright 1989 by Carnegie Mellon University
120 Permission to use, copy, modify, and distribute this software and its
121 documentation for any purpose and without fee is hereby granted,
122 provided that the above copyright notice appear in all copies and that
123 both that copyright notice and this permission notice appear in
124 supporting documentation, and that the name of CMU not be
125 used in advertising or publicity pertaining to distribution of the
126 software without specific, written prior permission.
128 CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
129 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
130 CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
131 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
132 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
133 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
135 ******************************************************************/
138 struct variable_list;
143 * Mimic size and alignment of 'struct sockaddr_storage' (see RFC 2553)
144 * But retain field names of traditional 'struct sockaddr'
147 #define _UCD_SS_MAXSIZE 92 /* <= sizeof( sockaddr_un ) */
148 #define _UCD_SS_ALIGNSIZE (sizeof (long))
150 #define _UCD_SS_PAD1SIZE (_UCD_SS_ALIGNSIZE - sizeof( unsigned short ))
151 #define _UCD_SS_PAD2SIZE (_UCD_SS_MAXSIZE - \
152 (sizeof( unsigned short ) + _UCD_SS_PAD1SIZE + _UCD_SS_ALIGNSIZE ))
156 #ifdef STRUCT_SOCKADDR_HAS_SA_UNION_SA_GENERIC_SA_FAMILY2
158 * Certain systems (notably Irix 6.x) have a non-traditional
159 * socket structure, and #define the traditional field names.
160 * This local definition should reproduce this structure, and still
161 * be large enough to handle any necessary Unix domain addresses.
166 unsigned char sa_len2;
167 unsigned char sa_family2;
169 unsigned short sa_family2;
171 char sa_data2[ _UCD_SS_PAD1SIZE ];
174 char sa_pad2[ _UCD_SS_PAD2SIZE ];
179 #ifdef STRUCT_SOCKADDR_HAS_SA_LEN
180 unsigned char sa_len;
181 unsigned char sa_family;
183 unsigned short sa_family;
185 char sa_data[ _UCD_SS_PAD1SIZE ];
187 char sa_pad2[ _UCD_SS_PAD2SIZE ];
192 #define USM_AUTH_KU_LEN 32
193 #define USM_PRIV_KU_LEN 32
198 * Protocol-version independent fields
201 int command; /* Type of this PDU */
202 long reqid; /* Request id - note: not incremented on retries */
203 long msgid; /* Message id for V3 messages
204 * note: incremented for each retry */
205 long transid; /* Unique ID for incoming transactions */
206 long sessid; /* Session id for AgentX messages */
207 long errstat; /* Error status (non_repeaters in GetBulk) */
208 long errindex; /* Error index (max_repetitions in GetBulk) */
209 u_long time; /* Uptime */
213 int securityLevel; /* noAuthNoPriv, authNoPriv, authPriv */
216 snmp_ipaddr address; /* Address of peer or trap destination */
218 struct variable_list *variables;
222 * SNMPv1 & SNMPv2c fields
224 u_char *community; /* community for outgoing requests. */
225 size_t community_len; /* Length of community name. */
230 oid *enterprise; /* System OID */
231 size_t enterprise_length;
232 long trap_type; /* trap type */
233 long specific_type; /* specific type */
234 snmp_ipaddr agent_addr;
239 u_char *contextEngineID; /* context snmpEngineID */
240 size_t contextEngineIDLen; /* Length of contextEngineID */
241 char *contextName; /* authoritative contextName */
242 size_t contextNameLen; /* Length of contextName */
243 u_char *securityEngineID; /* authoritative snmpEngineID for security */
244 size_t securityEngineIDLen;/* Length of securityEngineID */
245 char *securityName; /* on behalf of this principal */
246 size_t securityNameLen; /* Length of securityName. */
250 * (also uses SNMPv1 community field)
255 void * securityStateRef;
259 typedef int (*snmp_callback) (int, struct snmp_session *, int, struct snmp_pdu *, void *);
261 struct snmp_session {
263 * Protocol-version independent fields
266 int retries; /* Number of retries before timeout. */
267 long timeout; /* Number of uS until first timeout, then exponential backoff */
269 struct snmp_session *subsession;
270 struct snmp_session *next;
272 char *peername; /* Domain name or dotted IP address of default peer */
273 u_short remote_port;/* UDP port number of peer. */
274 u_short local_port; /* My UDP port number, 0 for default, picked randomly */
275 /* Authentication function or NULL if null authentication is used */
276 u_char *(*authenticator) (u_char *, size_t *, u_char *, size_t);
277 snmp_callback callback; /* Function to interpret incoming data */
278 /* Pointer to data that the callback function may consider important */
279 void *callback_magic;
281 int s_errno; /* copy of system errno */
282 int s_snmp_errno; /* copy of library errno */
283 long sessid; /* Session id - AgentX only */
286 * SNMPv1 & SNMPv2c fields
288 u_char *community; /* community for outgoing requests. */
289 size_t community_len; /* Length of community name. */
294 u_char *contextEngineID; /* authoritative snmpEngineID */
295 size_t contextEngineIDLen; /* Length of contextEngineID */
296 u_int engineBoots; /* initial engineBoots for remote engine */
297 u_int engineTime; /* initial engineTime for remote engine */
298 char *contextName; /* authoritative contextName */
299 size_t contextNameLen; /* Length of contextName */
300 u_char *securityEngineID; /* authoritative snmpEngineID */
301 size_t securityEngineIDLen; /* Length of contextEngineID */
302 char *securityName; /* on behalf of this principal */
303 size_t securityNameLen; /* Length of securityName. */
304 oid *securityAuthProto; /* auth protocol oid */
305 size_t securityAuthProtoLen; /* Length of auth protocol oid */
306 u_char securityAuthKey[USM_AUTH_KU_LEN]; /* Ku for auth protocol XXX */
307 size_t securityAuthKeyLen; /* Length of Ku for auth protocol */
308 oid *securityPrivProto; /* priv protocol oid */
309 size_t securityPrivProtoLen; /* Length of priv protocol oid */
310 u_char securityPrivKey[USM_PRIV_KU_LEN]; /* Ku for privacy protocol XXX */
311 size_t securityPrivKeyLen; /* Length of Ku for priv protocol */
313 int securityLevel; /* noAuthNoPriv, authNoPriv, authPriv */
317 * A list of all the outstanding requests for a particular session.
319 #ifdef SNMP_NEED_REQUEST_LIST
320 struct request_list {
321 struct request_list *next_request;
322 long request_id; /* request id */
323 long message_id; /* message id */
324 snmp_callback callback; /* user callback per request (NULL if unused) */
325 void *cb_data; /* user callback data per request (NULL if unused) */
326 int retries; /* Number of retries */
327 u_long timeout; /* length to wait for timeout */
328 struct timeval time; /* Time this request was made */
329 struct timeval expire; /* time this request is due to expire */
330 struct snmp_session *session;
331 struct snmp_pdu *pdu; /* The pdu for this request
332 (saved so it can be retransmitted */
334 #endif /* SNMP_NEED_REQUEST_LIST */
337 * Set fields in session and pdu to the following to get a default or unconfigured value.
339 #define SNMP_DEFAULT_COMMUNITY_LEN 0 /* to get a default community name */
340 #define SNMP_DEFAULT_RETRIES -1
341 #define SNMP_DEFAULT_TIMEOUT -1
342 #define SNMP_DEFAULT_REMPORT 0
343 #define SNMP_DEFAULT_REQID -1
344 #define SNMP_DEFAULT_MSGID -1
345 #define SNMP_DEFAULT_ERRSTAT -1
346 #define SNMP_DEFAULT_ERRINDEX -1
347 #define SNMP_DEFAULT_ADDRESS 0
348 #define SNMP_DEFAULT_PEERNAME NULL
349 #define SNMP_DEFAULT_ENTERPRISE_LENGTH 0
350 #define SNMP_DEFAULT_TIME 0
351 #define SNMP_DEFAULT_VERSION -1
352 #define SNMP_DEFAULT_CONTEXT ""
353 #define SNMP_DEFAULT_AUTH_PROTO usmHMACMD5AuthProtocol
354 #define SNMP_DEFAULT_AUTH_PROTOLEN USM_LENGTH_OID_TRANSFORM
355 #define SNMP_DEFAULT_PRIV_PROTO usmDESPrivProtocol
356 #define SNMP_DEFAULT_PRIV_PROTOLEN USM_LENGTH_OID_TRANSFORM
358 extern const char *snmp_api_errstring (int);
359 extern void snmp_perror (const char *);
360 extern void snmp_set_detail (const char *);
362 #define SNMP_MAX_MSG_SIZE 1472 /* ethernet MTU minus IP/UDP header */
363 #define SNMP_MAX_ENG_SIZE 32
364 #define SNMP_MAX_SEC_NAME_SIZE 256
365 #define SNMP_MAX_SEC_NAME_SIZE 256
366 #define SNMP_MAX_CONTEXT_SIZE 256
367 #define SNMP_SEC_PARAM_BUF_SIZE 256
369 /* set to one to ignore unauthenticated Reports */
370 #define SNMPV3_IGNORE_UNAUTH_REPORTS 0
371 /* to determine type of Report from varbind_list */
372 #define REPORT_STATS_LEN 9
373 #define REPORT_snmpUnknownSecurityModels_NUM 1
374 #define REPORT_snmpInvalidMsgs_NUM 2
375 #define REPORT_usmStatsUnsupportedSecLevels_NUM 1
376 #define REPORT_usmStatsNotInTimeWindows_NUM 2
377 #define REPORT_usmStatsUnknownUserNames_NUM 3
378 #define REPORT_usmStatsUnknownEngineIDs_NUM 4
379 #define REPORT_usmStatsWrongDigests_NUM 5
380 #define REPORT_usmStatsDecryptionErrors_NUM 6
382 #define SNMP_DETAIL_SIZE 512
384 #define SNMP_FLAGS_DONT_PROBE 0x100 /* don't probe for an engineID */
385 #define SNMP_FLAGS_STREAM_SOCKET 0x80
386 #define SNMP_FLAGS_LISTENING 0x40 /* Server stream sockets only */
387 #define SNMP_FLAGS_SUBSESSION 0x20
390 * Error return values.
392 * SNMPERR_SUCCESS is the non-PDU "success" code.
394 * XXX These should be merged with SNMP_ERR_* defines and confined
397 #define SNMPERR_SUCCESS (0) /* XXX Non-PDU "success" code. */
398 #define SNMPERR_GENERR (-1)
399 #define SNMPERR_BAD_LOCPORT (-2)
400 #define SNMPERR_BAD_ADDRESS (-3)
401 #define SNMPERR_BAD_SESSION (-4)
402 #define SNMPERR_TOO_LONG (-5)
403 #define SNMPERR_NO_SOCKET (-6)
404 #define SNMPERR_V2_IN_V1 (-7)
405 #define SNMPERR_V1_IN_V2 (-8)
406 #define SNMPERR_BAD_REPEATERS (-9)
407 #define SNMPERR_BAD_REPETITIONS (-10)
408 #define SNMPERR_BAD_ASN1_BUILD (-11)
409 #define SNMPERR_BAD_SENDTO (-12)
410 #define SNMPERR_BAD_PARSE (-13)
411 #define SNMPERR_BAD_VERSION (-14)
412 #define SNMPERR_BAD_SRC_PARTY (-15)
413 #define SNMPERR_BAD_DST_PARTY (-16)
414 #define SNMPERR_BAD_CONTEXT (-17)
415 #define SNMPERR_BAD_COMMUNITY (-18)
416 #define SNMPERR_NOAUTH_DESPRIV (-19)
417 #define SNMPERR_BAD_ACL (-20)
418 #define SNMPERR_BAD_PARTY (-21)
419 #define SNMPERR_ABORT (-22)
420 #define SNMPERR_UNKNOWN_PDU (-23)
421 #define SNMPERR_TIMEOUT (-24)
422 #define SNMPERR_BAD_RECVFROM (-25)
423 #define SNMPERR_BAD_ENG_ID (-26)
424 #define SNMPERR_BAD_SEC_NAME (-27)
425 #define SNMPERR_BAD_SEC_LEVEL (-28)
426 #define SNMPERR_ASN_PARSE_ERR (-29)
427 #define SNMPERR_UNKNOWN_SEC_MODEL (-30)
428 #define SNMPERR_INVALID_MSG (-31)
429 #define SNMPERR_UNKNOWN_ENG_ID (-32)
430 #define SNMPERR_UNKNOWN_USER_NAME (-33)
431 #define SNMPERR_UNSUPPORTED_SEC_LEVEL (-34)
432 #define SNMPERR_AUTHENTICATION_FAILURE (-35)
433 #define SNMPERR_NOT_IN_TIME_WINDOW (-36)
434 #define SNMPERR_DECRYPTION_ERR (-37)
435 #define SNMPERR_SC_GENERAL_FAILURE (-38)
436 #define SNMPERR_SC_NOT_CONFIGURED (-39)
437 #define SNMPERR_KT_NOT_AVAILABLE (-40)
438 #define SNMPERR_UNKNOWN_REPORT (-41)
439 #define SNMPERR_USM_GENERICERROR (-42)
440 #define SNMPERR_USM_UNKNOWNSECURITYNAME (-43)
441 #define SNMPERR_USM_UNSUPPORTEDSECURITYLEVEL (-44)
442 #define SNMPERR_USM_ENCRYPTIONERROR (-45)
443 #define SNMPERR_USM_AUTHENTICATIONFAILURE (-46)
444 #define SNMPERR_USM_PARSEERROR (-47)
445 #define SNMPERR_USM_UNKNOWNENGINEID (-48)
446 #define SNMPERR_USM_NOTINTIMEWINDOW (-49)
447 #define SNMPERR_USM_DECRYPTIONERROR (-50)
448 #define SNMPERR_NOMIB (-51)
449 #define SNMPERR_RANGE (-52)
450 #define SNMPERR_MAX_SUBID (-53)
451 #define SNMPERR_BAD_SUBID (-54)
452 #define SNMPERR_LONG_OID (-55)
453 #define SNMPERR_BAD_NAME (-56)
454 #define SNMPERR_VALUE (-57)
455 #define SNMPERR_UNKNOWN_OBJID (-58)
456 #define SNMPERR_NULL_PDU (-59)
457 #define SNMPERR_NO_VARS (-60)
458 #define SNMPERR_VAR_TYPE (-61)
459 #define SNMPERR_MALLOC (-62)
461 #define SNMPERR_MAX (-62)
463 #define non_repeaters errstat
464 #define max_repetitions errindex
467 struct variable_list {
468 struct variable_list *next_variable; /* NULL for last variable */
469 oid *name; /* Object identifier of variable */
470 size_t name_length; /* number of subid's in name */
471 u_char type; /* ASN type of variable */
472 union { /* value of variable */
477 struct counter64 *counter64;
478 #ifdef OPAQUE_SPECIAL_TYPES
481 /* t_union *unionVal; */
482 #endif /* OPAQUE_SPECIAL_TYPES */
485 oid name_loc[MAX_OID_LEN]; /* 90 percentile < 24. */
486 u_char buf[40]; /* 90 percentile < 40. */
492 * struct snmp_session *snmp_open(session)
493 * struct snmp_session *session;
495 * Sets up the session with the snmp_session information provided
496 * by the user. Then opens and binds the necessary UDP port.
497 * A handle to the created session is returned (this is different than
498 * the pointer passed to snmp_open()). On any error, NULL is returned
499 * and snmp_errno is set to the appropriate error code.
501 struct snmp_session *snmp_open (struct snmp_session *);
504 * int snmp_close(session)
505 * struct snmp_session *session;
507 * Close the input session. Frees all data allocated for the session,
508 * dequeues any pending requests, and closes any sockets allocated for
509 * the session. Returns 0 on error, 1 otherwise.
511 * snmp_close_sessions() does the same thing for all open sessions
513 int snmp_close (struct snmp_session *);
514 int snmp_close_sessions (void);
518 * int snmp_send(session, pdu)
519 * struct snmp_session *session;
520 * struct snmp_pdu *pdu;
522 * Sends the input pdu on the session after calling snmp_build to create
523 * a serialized packet. If necessary, set some of the pdu data from the
524 * session defaults. Add a request corresponding to this pdu to the list
525 * of outstanding requests on this session, then send the pdu.
526 * Returns the request id of the generated packet if applicable, otherwise 1.
527 * On any error, 0 is returned.
528 * The pdu is freed by snmp_send() unless a failure occured.
530 int snmp_send (struct snmp_session *, struct snmp_pdu *);
533 * int snmp_async_send(session, pdu, callback, cb_data)
534 * struct snmp_session *session;
535 * struct snmp_pdu *pdu;
536 * snmp_callback callback;
539 * Sends the input pdu on the session after calling snmp_build to create
540 * a serialized packet. If necessary, set some of the pdu data from the
541 * session defaults. Add a request corresponding to this pdu to the list
542 * of outstanding requests on this session and store callback and data,
544 * Returns the request id of the generated packet if applicable, otherwise 1.
545 * On any error, 0 is returned.
546 * The pdu is freed by snmp_send() unless a failure occured.
548 int snmp_async_send (struct snmp_session *, struct snmp_pdu *,
549 snmp_callback, void *);
553 * void snmp_read(fdset)
556 * Checks to see if any of the fd's set in the fdset belong to
557 * snmp. Each socket with it's fd set has a packet read from it
558 * and snmp_parse is called on the packet received. The resulting pdu
559 * is passed to the callback routine for that session. If the callback
560 * routine returns successfully, the pdu and it's request are deleted.
562 void snmp_read (fd_set *);
569 * struct snmp_pdu *pdu;
571 * Frees the pdu and any malloc'd data associated with it.
573 void snmp_free_pdu (struct snmp_pdu *);
575 void snmp_free_var (struct variable_list *);
577 void snmp_free_varbind(struct variable_list *var);
580 * int snmp_select_info(numfds, fdset, timeout, block)
583 * struct timeval *timeout;
586 * Returns info about what snmp requires from a select statement.
587 * numfds is the number of fds in the list that are significant.
588 * All file descriptors opened for SNMP are OR'd into the fdset.
589 * If activity occurs on any of these file descriptors, snmp_read
590 * should be called with that file descriptor set.
592 * The timeout is the latest time that SNMP can wait for a timeout. The
593 * select should be done with the minimum time between timeout and any other
594 * timeouts necessary. This should be checked upon each invocation of select.
595 * If a timeout is received, snmp_timeout should be called to check if the
596 * timeout was for SNMP. (snmp_timeout is idempotent)
598 * Block is 1 if the select is requested to block indefinitely, rather than
599 * time out. If block is input as 1, the timeout value will be treated as
600 * undefined, but it must be available for setting in snmp_select_info. On
601 * return, if block is true, the value of timeout will be undefined.
603 * snmp_select_info returns the number of open sockets. (i.e. The number
606 int snmp_select_info (int *, fd_set *, struct timeval *, int *);
611 * void snmp_timeout();
613 * snmp_timeout should be called whenever the timeout from snmp_select_info
614 * expires, but it is idempotent, so snmp_timeout can be polled (probably a
615 * cpu expensive proposition). snmp_timeout checks to see if any of the
616 * sessions have an outstanding request that has timed out. If it finds one
617 * (or more), and that pdu has more retries available, a new packet is formed
618 * from the pdu and is resent. If there are no more retries available, the
619 * callback for the session is used to alert the user of the timeout.
622 void snmp_timeout (void);
626 * This routine must be supplied by the application:
628 * u_char *authenticator(pdu, length, community, community_len)
629 * u_char *pdu; The rest of the PDU to be authenticated
630 * int *length; The length of the PDU (updated by the authenticator)
631 * u_char *community; The community name to authenticate under.
632 * int community_len The length of the community name.
634 * Returns the authenticated pdu, or NULL if authentication failed.
635 * If null authentication is used, the authenticator in snmp_session can be
642 * This routine must be supplied by the application:
644 * int callback(operation, session, reqid, pdu, magic)
646 * struct snmp_session *session; The session authenticated under.
647 * int reqid; The request id of this pdu (0 for TRAP)
648 * struct snmp_pdu *pdu; The pdu information.
649 * void *magic A link to the data for this routine.
651 * Returns 1 if request was successful, 0 if it should be kept pending.
652 * Any data in the pdu must be copied because it will be freed elsewhere.
653 * Operations are defined below:
656 #define RECEIVED_MESSAGE 1
659 long snmp_get_next_msgid(void);
660 long snmp_get_next_reqid(void);
661 long snmp_get_next_sessid(void);
662 long snmp_get_next_transid(void);
663 /* provide for backwards compatibility */
664 void snmp_set_dump_packet(int);
665 int snmp_get_dump_packet(void);
666 void snmp_set_quick_print(int);
667 int snmp_get_quick_print(void);
668 void snmp_set_suffix_only(int);
669 int snmp_get_suffix_only(void);
670 void snmp_set_full_objid(int);
671 int snmp_get_full_objid(void);
672 void snmp_set_random_access(int);
673 int snmp_get_random_access(void);
675 int snmp_oid_compare (const oid *, size_t, const oid *, size_t);
676 void init_snmp (const char *);
677 u_char *snmp_pdu_build (struct snmp_pdu *, u_char *, size_t *);
678 int snmpv3_parse(struct snmp_pdu *, u_char *, size_t *, u_char **);
679 int snmpv3_dparse(struct snmp_pdu *, u_char *, size_t *, u_char **, int);
680 int snmpv3_packet_build(struct snmp_pdu *pdu, u_char *packet, size_t *out_length, u_char *pdu_data, size_t pdu_data_len);
681 int snmpv3_make_report(struct snmp_pdu *pdu, int error);
682 int snmpv3_get_report_type(struct snmp_pdu *pdu);
683 int snmp_pdu_parse(struct snmp_pdu *pdu, u_char *data, size_t *length);
684 int snmp_pdu_dparse(struct snmp_pdu *pdu, u_char *data, size_t *length, int);
685 u_char* snmpv3_scopedPDU_parse(struct snmp_pdu *pdu, u_char *cp, size_t *length);
686 u_char* snmpv3_scopedPDU_dparse(struct snmp_pdu *pdu, u_char *cp, size_t *length, int);
687 void snmp_shutdown(const char *type);
688 struct variable_list *snmp_pdu_add_variable (struct snmp_pdu *, oid *, size_t, u_char, u_char *, size_t);
689 struct variable_list *snmp_varlist_add_variable(struct variable_list **varlist,
690 oid *name, size_t name_length, u_char type, u_char *value, size_t len);
691 int hex_to_binary (const char *, u_char *);
692 int ascii_to_binary (const char *, u_char *);
693 int snmp_add_var (struct snmp_pdu *, oid*, size_t, char, const char *);
694 oid *snmp_duplicate_objid(oid *objToCopy, size_t);
695 u_int snmp_increment_statistic(int which);
696 u_int snmp_increment_statistic_by(int which, int count);
697 u_int snmp_get_statistic(int which);
698 void snmp_init_statistics(void);
699 int create_user_from_session(struct snmp_session *session);
702 struct snmp_session *snmp_open_ex (struct snmp_session *,
703 int (*fpre_parse) (struct snmp_session *, snmp_ipaddr),
704 int (*fparse) (struct snmp_session *, struct snmp_pdu *, u_char *, size_t),
705 int (*fpost_parse) (struct snmp_session *, struct snmp_pdu *, int),
706 int (*fbuild) (struct snmp_session *, struct snmp_pdu *, u_char *, size_t *),
707 int (*fcheck) (u_char *, size_t)
710 /* provided for backwards compatability. Don't use these functions.
711 See snmp_debug.h and snmp_debug.c instead.
714 void DEBUGP (const char *, ...);
716 void DEBUGP (va_alist);
718 void DEBUGPOID(oid *, size_t);
719 void snmp_set_do_debugging (int);
720 int snmp_get_do_debugging (void);
722 #ifdef CMU_COMPATIBLE
723 extern int snmp_dump_packet;
724 extern int quick_print;
727 size_t snmp_socket_length (int family);
730 * snmp_error - return error data
731 * Inputs : address of errno, address of snmp_errno, address of string
732 * Caller must free the string returned after use.
734 void snmp_error (struct snmp_session *, int *, int *, char **);
736 * single session API.
738 * These functions perform similar actions as snmp_XX functions,
739 * but operate on a single session only.
744 struct snmp_session session, *ss;
745 struct snmp_pdu *pdu, *response;
747 snmp_sess_init(&session);
748 session.retries = ...
749 session.remote_port = ...
750 sessp = snmp_sess_open(&session);
751 ss = snmp_sess_session(sessp);
755 if (ss->community) free(ss->community);
756 ss->community = strdup(gateway);
757 ss->community_len = strlen(gateway);
759 snmp_sess_synch_response(sessp, pdu, &response);
761 snmp_sess_close(sessp);
764 * snmp_sess_synch_response, in snmp_client.h.
767 * 1. Invoke snmp_sess_session after snmp_sess_open.
768 * 2. snmp_sess_session return value is an opaque pointer.
769 * 3. Do NOT free memory returned by snmp_sess_session.
770 * 4. Replace snmp_send(ss,pdu) with snmp_sess_send(sessp,pdu)
773 void snmp_sess_init (struct snmp_session *);
774 void * snmp_sess_open (struct snmp_session *);
775 struct snmp_session * snmp_sess_session (void *);
777 /* use return value from snmp_sess_open as void * parameter */
779 int snmp_sess_send (void *, struct snmp_pdu *);
780 int snmp_sess_async_send (void *, struct snmp_pdu *,
781 snmp_callback, void *);
782 int snmp_sess_select_info (void *, int *, fd_set *,
783 struct timeval *, int *);
784 int snmp_sess_read (void *, fd_set *);
785 void snmp_sess_timeout (void *);
786 int snmp_sess_close (void *);
788 void snmp_sess_error (void *, int *, int *, char **);
789 void snmp_sess_perror (const char *prog_string, struct snmp_session *ss);
791 /* end single session API */
793 /* generic statistic counters */
795 /* snmpv3 statistics */
798 #define STAT_SNMPUNKNOWNSECURITYMODELS 0
799 #define STAT_SNMPINVALIDMSGS 1
800 #define STAT_SNMPUNKNOWNPDUHANDLERS 2
801 #define STAT_MPD_STATS_START STAT_SNMPUNKNOWNSECURITYMODELS
802 #define STAT_MPD_STATS_END STAT_SNMPUNKNOWNPDUHANDLERS
805 #define STAT_USMSTATSUNSUPPORTEDSECLEVELS 3
806 #define STAT_USMSTATSNOTINTIMEWINDOWS 4
807 #define STAT_USMSTATSUNKNOWNUSERNAMES 5
808 #define STAT_USMSTATSUNKNOWNENGINEIDS 6
809 #define STAT_USMSTATSWRONGDIGESTS 7
810 #define STAT_USMSTATSDECRYPTIONERRORS 8
811 #define STAT_USM_STATS_START STAT_USMSTATSUNSUPPORTEDSECLEVELS
812 #define STAT_USM_STATS_END STAT_USMSTATSDECRYPTIONERRORS
815 #define STAT_SNMPINPKTS 9
816 #define STAT_SNMPOUTPKTS 10
817 #define STAT_SNMPINBADVERSIONS 11
818 #define STAT_SNMPINBADCOMMUNITYNAMES 12
819 #define STAT_SNMPINBADCOMMUNITYUSES 13
820 #define STAT_SNMPINASNPARSEERRS 14
821 /* #define STAT_SNMPINBADTYPES 15 */
822 #define STAT_SNMPINTOOBIGS 16
823 #define STAT_SNMPINNOSUCHNAMES 17
824 #define STAT_SNMPINBADVALUES 18
825 #define STAT_SNMPINREADONLYS 19
826 #define STAT_SNMPINGENERRS 20
827 #define STAT_SNMPINTOTALREQVARS 21
828 #define STAT_SNMPINTOTALSETVARS 22
829 #define STAT_SNMPINGETREQUESTS 23
830 #define STAT_SNMPINGETNEXTS 24
831 #define STAT_SNMPINSETREQUESTS 25
832 #define STAT_SNMPINGETRESPONSES 26
833 #define STAT_SNMPINTRAPS 27
834 #define STAT_SNMPOUTTOOBIGS 28
835 #define STAT_SNMPOUTNOSUCHNAMES 29
836 #define STAT_SNMPOUTBADVALUES 30
837 /* #define STAT_SNMPOUTREADONLYS 31 */
838 #define STAT_SNMPOUTGENERRS 32
839 #define STAT_SNMPOUTGETREQUESTS 33
840 #define STAT_SNMPOUTGETNEXTS 34
841 #define STAT_SNMPOUTSETREQUESTS 35
842 #define STAT_SNMPOUTGETRESPONSES 36
843 #define STAT_SNMPOUTTRAPS 37
844 /* AUTHTRAPENABLE 38 */
845 #define STAT_SNMPSILENTDROPS 39
846 #define STAT_SNMPPROXYDROPS 40
847 #define STAT_SNMP_STATS_START STAT_SNMPINPKTS
848 #define STAT_SNMP_STATS_END STAT_SNMPOUTTRAPS
856 #endif /* SNMP_API_H */