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asn1.h
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bridge_snmp.h
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snmp.h
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snmp_mibII.h
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snmp_netgraph.h
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snmpagent.h
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snmpclient.h
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snmpmod.h
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Editing: snmpclient.h
/* * Copyright (c) 2001-2003 * Fraunhofer Institute for Open Communication Systems (FhG Fokus). * All rights reserved. * * Author: Harti Brandt <harti@freebsd.org> * Kendy Kutzner * * 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/lib/snmpclient.h,v 1.19 2005/05/23 11:10:14 brandt_h Exp $ */ #ifndef _BSNMP_SNMPCLIENT_H #define _BSNMP_SNMPCLIENT_H #include <sys/types.h> #include <sys/socket.h> #include <sys/time.h> #include <netinet/in.h> #include <stddef.h> #define SNMP_STRERROR_LEN 200 #define SNMP_LOCAL_PATH "/tmp/snmpXXXXXXXXXXXXXX" /* * transport methods */ #define SNMP_TRANS_UDP 0 #define SNMP_TRANS_LOC_DGRAM 1 #define SNMP_TRANS_LOC_STREAM 2 #define SNMP_TRANS_UDP6 3 /* type of callback function for responses * this callback function is responsible for free() any memory associated with * any of the PDUs. Therefor it may call snmp_pdu_free() */ typedef void (*snmp_send_cb_f)(struct snmp_pdu *, struct snmp_pdu *, void *); /* type of callback function for timeouts */ typedef void (*snmp_timeout_cb_f)(void * ); /* timeout start function */ typedef void *(*snmp_timeout_start_f)(struct timeval *timeout, snmp_timeout_cb_f callback, void *); /* timeout stop function */ typedef void (*snmp_timeout_stop_f)(void *timeout_id); /* * Client context. */ struct snmp_client { enum snmp_version version; int trans; /* which transport to use */ /* these two are read-only for the application */ char *cport; /* port number as string */ char *chost; /* host name or IP address as string */ char read_community[SNMP_COMMUNITY_MAXLEN + 1]; char write_community[SNMP_COMMUNITY_MAXLEN + 1]; /* SNMPv3 specific fields */ int32_t identifier; int32_t security_model; struct snmp_engine engine; struct snmp_user user; /* SNMPv3 Access control - VACM*/ uint32_t clen; uint8_t cengine[SNMP_ENGINE_ID_SIZ]; char cname[SNMP_CONTEXT_NAME_SIZ]; struct timeval timeout; u_int retries; int dump_pdus; size_t txbuflen; size_t rxbuflen; int fd; int32_t next_reqid; int32_t max_reqid; int32_t min_reqid; char error[SNMP_STRERROR_LEN]; snmp_timeout_start_f timeout_start; snmp_timeout_stop_f timeout_stop; char local_path[sizeof(SNMP_LOCAL_PATH)]; }; /* the global context */ extern struct snmp_client snmp_client; /* initizialies a snmp_client structure */ void snmp_client_init(struct snmp_client *); /* initialize fields */ int snmp_client_set_host(struct snmp_client *, const char *); int snmp_client_set_port(struct snmp_client *, const char *); /* open connection to snmp server (hostname or portname can be NULL) */ int snmp_open(const char *_hostname, const char *_portname, const char *_read_community, const char *_write_community); /* close connection */ void snmp_close(void); /* initialize a snmp_pdu structure */ void snmp_pdu_create(struct snmp_pdu *, u_int _op); /* add pairs of (struct asn_oid *, enum snmp_syntax) to an existing pdu */ int snmp_add_binding(struct snmp_pdu *, ...); /* check wheater the answer is valid or not */ int snmp_pdu_check(const struct snmp_pdu *_req, const struct snmp_pdu *_resp); int32_t snmp_pdu_send(struct snmp_pdu *_pdu, snmp_send_cb_f _func, void *_arg); /* append an index to an oid */ int snmp_oid_append(struct asn_oid *_oid, const char *_fmt, ...); /* receive a packet */ int snmp_receive(int _blocking); /* * This structure is used to describe an SNMP table that is to be fetched. * The C-structure that is produced by the fetch function must start with * a TAILQ_ENTRY and an u_int64_t. */ struct snmp_table { /* base OID of the table */ struct asn_oid table; /* type OID of the LastChange variable for the table if any */ struct asn_oid last_change; /* maximum number of iterations if table has changed */ u_int max_iter; /* size of the C-structure */ size_t entry_size; /* number of index fields */ u_int index_size; /* bit mask of required fields */ uint64_t req_mask; /* indexes and columns to fetch. Ended by a NULL syntax entry */ struct snmp_table_entry { /* the column sub-oid, ignored for index fields */ asn_subid_t subid; /* the syntax of the column or index */ enum snmp_syntax syntax; /* offset of the field into the C-structure. For octet strings * this points to an u_char * followed by a size_t */ off_t offset; #if defined(__GNUC__) && __GNUC__ < 3 } entries[0]; #else } entries[]; #endif }; /* callback type for table fetch */ typedef void (*snmp_table_cb_f)(void *_list, void *_arg, int _res); /* fetch a table. The argument points to a TAILQ_HEAD */ int snmp_table_fetch(const struct snmp_table *descr, void *); int snmp_table_fetch_async(const struct snmp_table *, void *, snmp_table_cb_f, void *); /* send a request and wait for the response */ int snmp_dialog(struct snmp_pdu *_req, struct snmp_pdu *_resp); /* discover an authorative snmpEngineId */ int snmp_discover_engine(char *); /* parse a server specification */ int snmp_parse_server(struct snmp_client *, const char *); #endif /* _BSNMP_SNMPCLIENT_H */
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