1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2006 Shteryana Shopova <syrinx@FreeBSD.org>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  * Bridge MIB implementation for SNMPd.
29  * Bridge pfil controls.
30  *
31  * $FreeBSD$
32  */
33 
34 #include <sys/types.h>
35 #include <sys/sysctl.h>
36 #include <sys/socket.h>
37 
38 #include <net/ethernet.h>
39 #include <net/if.h>
40 #include <net/if_mib.h>
41 #include <net/if_types.h>
42 
43 #include <errno.h>
44 #include <string.h>
45 #include <stdlib.h>
46 #include <syslog.h>
47 
48 #include <bsnmp/snmpmod.h>
49 #include <bsnmp/snmp_mibII.h>
50 
51 #define	SNMPTREE_TYPES
52 #include "bridge_tree.h"
53 #include "bridge_snmp.h"
54 
55 static int
56 val2snmp_truth(uint8_t val)
57 {
58 	if (val == 0)
59 		return (2);
60 
61 	return (1);
62 }
63 
64 static int
65 snmp_truth2val(int32_t truth)
66 {
67 	if (truth == 2)
68 		return (0);
69 	else if (truth == 1)
70 		return (1);
71 
72 	return (-1);
73 }
74 
75 int
76 op_begemot_bridge_pf(struct snmp_context *ctx, struct snmp_value *val,
77 	uint sub, uint iidx __unused, enum snmp_op op)
78 {
79 	int k_val;
80 
81 	if (val->var.subs[sub - 1] > LEAF_begemotBridgeLayer2PfStatus)
82 		return (SNMP_ERR_NOSUCHNAME);
83 
84 	switch (op) {
85 		case SNMP_OP_GETNEXT:
86 			abort();
87 		case SNMP_OP_ROLLBACK:
88 			bridge_do_pfctl(val->var.subs[sub - 1] - 1,
89 			    op, &(ctx->scratch->int1));
90 				return (SNMP_ERR_NOERROR);
91 
92 		case SNMP_OP_COMMIT:
93 			return (SNMP_ERR_NOERROR);
94 
95 		case SNMP_OP_SET:
96 			ctx->scratch->int1 =
97 			    bridge_get_pfval(val->var.subs[sub - 1]);
98 
99 			if ((k_val = snmp_truth2val(val->v.integer)) < 0)
100 				return (SNMP_ERR_BADVALUE);
101 			return (SNMP_ERR_NOERROR);
102 
103 		case SNMP_OP_GET:
104 			switch (val->var.subs[sub - 1]) {
105 			    case LEAF_begemotBridgePfilStatus:
106 			    case LEAF_begemotBridgePfilMembers:
107 			    case LEAF_begemotBridgePfilIpOnly:
108 			    case LEAF_begemotBridgeLayer2PfStatus:
109 				if (bridge_do_pfctl(val->var.subs[sub - 1] - 1,
110 				    op, &k_val) < 0)
111 					return (SNMP_ERR_GENERR);
112 				val->v.integer = val2snmp_truth(k_val);
113 				return (SNMP_ERR_NOERROR);
114 			}
115 			abort();
116 	}
117 
118 	abort();
119 }
120