1 /**
2  * @file
3  * SNMP server options list
4  */
5 
6 /*
7  * Copyright (c) 2015 Dirk Ziegelmeier
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without modification,
11  * are permitted provided that the following conditions are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright notice,
14  *    this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  *    this list of conditions and the following disclaimer in the documentation
17  *    and/or other materials provided with the distribution.
18  * 3. The name of the author may not be used to endorse or promote products
19  *    derived from this software without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30  * OF SUCH DAMAGE.
31  *
32  * This file is part of the lwIP TCP/IP stack.
33  *
34  * Author: Dirk Ziegelmeier
35  *
36  */
37 #ifndef LWIP_HDR_SNMP_OPTS_H
38 #define LWIP_HDR_SNMP_OPTS_H
39 
40 #include "lwip/opt.h"
41 
42 /**
43  * @defgroup snmp_opts Options
44  * @ingroup snmp
45  * @{
46  */
47 
48 /**
49  * LWIP_SNMP==1: This enables the lwIP SNMP agent. UDP must be available
50  * for SNMP transport.
51  * If you want to use your own SNMP agent, leave this disabled.
52  * To integrate MIB2 of an external agent, you need to enable
53  * LWIP_MIB2_CALLBACKS and MIB2_STATS. This will give you the callbacks
54  * and statistics counters you need to get MIB2 working.
55  */
56 #if !defined LWIP_SNMP || defined __DOXYGEN__
57 #define LWIP_SNMP                       0
58 #endif
59 
60 /**
61  * SNMP_USE_NETCONN: Use netconn API instead of raw API.
62  * Makes SNMP agent run in a worker thread, so blocking operations
63  * can be done in MIB calls.
64  */
65 #if !defined SNMP_USE_NETCONN || defined __DOXYGEN__
66 #define SNMP_USE_NETCONN           0
67 #endif
68 
69 /**
70  * SNMP_USE_RAW: Use raw API.
71  * SNMP agent does not run in a worker thread, so blocking operations
72  * should not be done in MIB calls.
73  */
74 #if !defined SNMP_USE_RAW || defined __DOXYGEN__
75 #define SNMP_USE_RAW               1
76 #endif
77 
78 #if SNMP_USE_NETCONN && SNMP_USE_RAW
79 #error SNMP stack can use only one of the APIs {raw, netconn}
80 #endif
81 
82 #if LWIP_SNMP && !SNMP_USE_NETCONN && !SNMP_USE_RAW
83 #error SNMP stack needs a receive API and UDP {raw, netconn}
84 #endif
85 
86 #if SNMP_USE_NETCONN
87 /**
88  * SNMP_STACK_SIZE: Stack size of SNMP netconn worker thread
89  */
90 #if !defined SNMP_STACK_SIZE || defined __DOXYGEN__
91 #define SNMP_STACK_SIZE            DEFAULT_THREAD_STACKSIZE
92 #endif
93 
94 /**
95  * SNMP_THREAD_PRIO: SNMP netconn worker thread priority
96  */
97 #if !defined SNMP_THREAD_PRIO || defined __DOXYGEN__
98 #define SNMP_THREAD_PRIO           DEFAULT_THREAD_PRIO
99 #endif
100 #endif /* SNMP_USE_NETCONN */
101 
102 /**
103  * SNMP_TRAP_DESTINATIONS: Number of trap destinations. At least one trap
104  * destination is required
105  */
106 #if !defined SNMP_TRAP_DESTINATIONS || defined __DOXYGEN__
107 #define SNMP_TRAP_DESTINATIONS          1
108 #endif
109 
110 /**
111  * Only allow SNMP write actions that are 'safe' (e.g. disabling netifs is not
112  * a safe action and disabled when SNMP_SAFE_REQUESTS = 1).
113  * Unsafe requests are disabled by default!
114  */
115 #if !defined SNMP_SAFE_REQUESTS || defined __DOXYGEN__
116 #define SNMP_SAFE_REQUESTS              1
117 #endif
118 
119 /**
120  * The maximum length of strings used.
121  */
122 #if !defined SNMP_MAX_OCTET_STRING_LEN || defined __DOXYGEN__
123 #define SNMP_MAX_OCTET_STRING_LEN       127
124 #endif
125 
126 /**
127  * The maximum number of Sub ID's inside an object identifier.
128  * Indirectly this also limits the maximum depth of SNMP tree.
129  */
130 #if !defined SNMP_MAX_OBJ_ID_LEN || defined __DOXYGEN__
131 #define SNMP_MAX_OBJ_ID_LEN             50
132 #endif
133 
134 #if !defined SNMP_MAX_VALUE_SIZE || defined __DOXYGEN__
135 /**
136  * The minimum size of a value.
137  */
138 #define SNMP_MIN_VALUE_SIZE             (2 * sizeof(u32_t*)) /* size required to store the basic types (8 bytes for counter64) */
139 /**
140  * The maximum size of a value.
141  */
142 #define SNMP_MAX_VALUE_SIZE             LWIP_MAX(LWIP_MAX((SNMP_MAX_OCTET_STRING_LEN), sizeof(u32_t)*(SNMP_MAX_OBJ_ID_LEN)), SNMP_MIN_VALUE_SIZE)
143 #endif
144 
145 /**
146  * The snmp read-access community. Used for write-access and traps, too
147  * unless SNMP_COMMUNITY_WRITE or SNMP_COMMUNITY_TRAP are enabled, respectively.
148  */
149 #if !defined SNMP_COMMUNITY || defined __DOXYGEN__
150 #define SNMP_COMMUNITY                  "public"
151 #endif
152 
153 /**
154  * The snmp write-access community.
155  * Set this community to "" in order to disallow any write access.
156  */
157 #if !defined SNMP_COMMUNITY_WRITE || defined __DOXYGEN__
158 #define SNMP_COMMUNITY_WRITE            "private"
159 #endif
160 
161 /**
162  * The snmp community used for sending traps.
163  */
164 #if !defined SNMP_COMMUNITY_TRAP || defined __DOXYGEN__
165 #define SNMP_COMMUNITY_TRAP             "public"
166 #endif
167 
168 /**
169  * The maximum length of community string.
170  * If community names shall be adjusted at runtime via snmp_set_community() calls,
171  * enter here the possible maximum length (+1 for terminating null character).
172  */
173 #if !defined SNMP_MAX_COMMUNITY_STR_LEN || defined __DOXYGEN__
174 #define SNMP_MAX_COMMUNITY_STR_LEN LWIP_MAX(LWIP_MAX(sizeof(SNMP_COMMUNITY), sizeof(SNMP_COMMUNITY_WRITE)), sizeof(SNMP_COMMUNITY_TRAP))
175 #endif
176 
177 /**
178  * The OID identifiying the device. This may be the enterprise OID itself or any OID located below it in tree.
179  */
180 #if !defined SNMP_DEVICE_ENTERPRISE_OID || defined __DOXYGEN__
181 #define SNMP_LWIP_ENTERPRISE_OID 26381
182 /**
183  * IANA assigned enterprise ID for lwIP is 26381
184  * @see http://www.iana.org/assignments/enterprise-numbers
185  *
186  * @note this enterprise ID is assigned to the lwIP project,
187  * all object identifiers living under this ID are assigned
188  * by the lwIP maintainers!
189  * @note don't change this define, use snmp_set_device_enterprise_oid()
190  *
191  * If you need to create your own private MIB you'll need
192  * to apply for your own enterprise ID with IANA:
193  * http://www.iana.org/numbers.html
194  */
195 #define SNMP_DEVICE_ENTERPRISE_OID {1, 3, 6, 1, 4, 1, SNMP_LWIP_ENTERPRISE_OID}
196 /**
197  * Length of SNMP_DEVICE_ENTERPRISE_OID
198  */
199 #define SNMP_DEVICE_ENTERPRISE_OID_LEN 7
200 #endif
201 
202 /**
203  * SNMP_DEBUG: Enable debugging for SNMP messages.
204  */
205 #if !defined SNMP_DEBUG || defined __DOXYGEN__
206 #define SNMP_DEBUG                      LWIP_DBG_OFF
207 #endif
208 
209 /**
210  * SNMP_MIB_DEBUG: Enable debugging for SNMP MIBs.
211  */
212 #if !defined SNMP_MIB_DEBUG || defined __DOXYGEN__
213 #define SNMP_MIB_DEBUG                  LWIP_DBG_OFF
214 #endif
215 
216 /**
217  * Indicates if the MIB2 implementation of LWIP SNMP stack is used.
218  */
219 #if !defined SNMP_LWIP_MIB2 || defined __DOXYGEN__
220 #define SNMP_LWIP_MIB2                      LWIP_SNMP
221 #endif
222 
223 /**
224  * Value return for sysDesc field of MIB2.
225  */
226 #if !defined SNMP_LWIP_MIB2_SYSDESC || defined __DOXYGEN__
227 #define SNMP_LWIP_MIB2_SYSDESC              "lwIP"
228 #endif
229 
230 /**
231  * Value return for sysName field of MIB2.
232  * To make sysName field settable, call snmp_mib2_set_sysname() to provide the necessary buffers.
233  */
234 #if !defined SNMP_LWIP_MIB2_SYSNAME || defined __DOXYGEN__
235 #define SNMP_LWIP_MIB2_SYSNAME              "FQDN-unk"
236 #endif
237 
238 /**
239  * Value return for sysContact field of MIB2.
240  * To make sysContact field settable, call snmp_mib2_set_syscontact() to provide the necessary buffers.
241  */
242 #if !defined SNMP_LWIP_MIB2_SYSCONTACT || defined __DOXYGEN__
243 #define SNMP_LWIP_MIB2_SYSCONTACT           ""
244 #endif
245 
246 /**
247  * Value return for sysLocation field of MIB2.
248  * To make sysLocation field settable, call snmp_mib2_set_syslocation() to provide the necessary buffers.
249  */
250 #if !defined SNMP_LWIP_MIB2_SYSLOCATION || defined __DOXYGEN__
251 #define SNMP_LWIP_MIB2_SYSLOCATION          ""
252 #endif
253 
254 /**
255  * This value is used to limit the repetitions processed in GetBulk requests (value == 0 means no limitation).
256  * This may be useful to limit the load for a single request.
257  * According to SNMP RFC 1905 it is allowed to not return all requested variables from a GetBulk request if system load would be too high.
258  * so the effect is that the client will do more requests to gather all data.
259  * For the stack this could be useful in case that SNMP processing is done in TCP/IP thread. In this situation a request with many
260  * repetitions could block the thread for a longer time. Setting limit here will keep the stack more responsive.
261  */
262 #if !defined SNMP_LWIP_GETBULK_MAX_REPETITIONS || defined __DOXYGEN__
263 #define SNMP_LWIP_GETBULK_MAX_REPETITIONS 0
264 #endif
265 
266 /**
267  * @}
268  */
269 
270 /*
271    ------------------------------------
272    ---------- SNMPv3 options ----------
273    ------------------------------------
274 */
275 
276 /**
277  * LWIP_SNMP_V3==1: This enables EXPERIMENTAL SNMPv3 support. LWIP_SNMP must
278  * also be enabled.
279  * THIS IS UNDER DEVELOPMENT AND SHOULD NOT BE ENABLED IN PRODUCTS.
280  */
281 #ifndef LWIP_SNMP_V3
282 #define LWIP_SNMP_V3               0
283 #endif
284 
285 #ifndef LWIP_SNMP_V3_MBEDTLS
286 #define LWIP_SNMP_V3_MBEDTLS       LWIP_SNMP_V3
287 #endif
288 
289 #ifndef LWIP_SNMP_V3_CRYPTO
290 #define LWIP_SNMP_V3_CRYPTO        LWIP_SNMP_V3_MBEDTLS
291 #endif
292 
293 #ifndef LWIP_SNMP_CONFIGURE_VERSIONS
294 #define LWIP_SNMP_CONFIGURE_VERSIONS 0
295 #endif
296 
297 #endif /* LWIP_HDR_SNMP_OPTS_H */
298