1 files changed, 187 insertions, 0 deletions
diff --git a/daemon/snmpclient.h b/daemon/snmpclient.h
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+++ b/daemon/snmpclient.h
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+/*
+ * 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
+
+/* 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];
+
+	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);
+
+/* parse a server specification */
+int snmp_parse_server(struct snmp_client *, const char *);
+
+#endif /* _BSNMP_SNMPCLIENT_H */