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