1 /**
2 * @file
3 * Management Information Base II (RFC1213) IP objects and functions.
4 */
5
6 /*
7 * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
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 * Author: Dirk Ziegelmeier <dziegel@gmx.de>
33 * Christiaan Simons <christiaan.simons@axon.tv>
34 */
35
36 #include "lwip/snmp.h"
37 #include "lwip/apps/snmp.h"
38 #include "lwip/apps/snmp_core.h"
39 #include "lwip/apps/snmp_mib2.h"
40 #include "lwip/apps/snmp_table.h"
41 #include "lwip/apps/snmp_scalar.h"
42 #include "lwip/stats.h"
43 #include "lwip/netif.h"
44 #include "lwip/ip.h"
45 #include "lwip/etharp.h"
46
47 #if LWIP_SNMP && SNMP_LWIP_MIB2
48
49 #if SNMP_USE_NETCONN
50 #define SYNC_NODE_NAME(node_name) node_name ## _synced
51 #define CREATE_LWIP_SYNC_NODE(oid, node_name) \
52 static const struct snmp_threadsync_node node_name ## _synced = SNMP_CREATE_THREAD_SYNC_NODE(oid, &node_name.node, &snmp_mib2_lwip_locks);
53 #else
54 #define SYNC_NODE_NAME(node_name) node_name
55 #define CREATE_LWIP_SYNC_NODE(oid, node_name)
56 #endif
57
58 #if LWIP_IPV4
59 /* --- ip .1.3.6.1.2.1.4 ----------------------------------------------------- */
60
61 static s16_t
ip_get_value(struct snmp_node_instance * instance,void * value)62 ip_get_value(struct snmp_node_instance* instance, void* value)
63 {
64 s32_t* sint_ptr = (s32_t*)value;
65 u32_t* uint_ptr = (u32_t*)value;
66
67 switch (instance->node->oid) {
68 case 1: /* ipForwarding */
69 #if IP_FORWARD
70 /* forwarding */
71 *sint_ptr = 1;
72 #else
73 /* not-forwarding */
74 *sint_ptr = 2;
75 #endif
76 return sizeof(*sint_ptr);
77 case 2: /* ipDefaultTTL */
78 *sint_ptr = IP_DEFAULT_TTL;
79 return sizeof(*sint_ptr);
80 case 3: /* ipInReceives */
81 *uint_ptr = STATS_GET(mib2.ipinreceives);
82 return sizeof(*uint_ptr);
83 case 4: /* ipInHdrErrors */
84 *uint_ptr = STATS_GET(mib2.ipinhdrerrors);
85 return sizeof(*uint_ptr);
86 case 5: /* ipInAddrErrors */
87 *uint_ptr = STATS_GET(mib2.ipinaddrerrors);
88 return sizeof(*uint_ptr);
89 case 6: /* ipForwDatagrams */
90 *uint_ptr = STATS_GET(mib2.ipforwdatagrams);
91 return sizeof(*uint_ptr);
92 case 7: /* ipInUnknownProtos */
93 *uint_ptr = STATS_GET(mib2.ipinunknownprotos);
94 return sizeof(*uint_ptr);
95 case 8: /* ipInDiscards */
96 *uint_ptr = STATS_GET(mib2.ipindiscards);
97 return sizeof(*uint_ptr);
98 case 9: /* ipInDelivers */
99 *uint_ptr = STATS_GET(mib2.ipindelivers);
100 return sizeof(*uint_ptr);
101 case 10: /* ipOutRequests */
102 *uint_ptr = STATS_GET(mib2.ipoutrequests);
103 return sizeof(*uint_ptr);
104 case 11: /* ipOutDiscards */
105 *uint_ptr = STATS_GET(mib2.ipoutdiscards);
106 return sizeof(*uint_ptr);
107 case 12: /* ipOutNoRoutes */
108 *uint_ptr = STATS_GET(mib2.ipoutnoroutes);
109 return sizeof(*uint_ptr);
110 case 13: /* ipReasmTimeout */
111 #if IP_REASSEMBLY
112 *sint_ptr = IP_REASS_MAXAGE;
113 #else
114 *sint_ptr = 0;
115 #endif
116 return sizeof(*sint_ptr);
117 case 14: /* ipReasmReqds */
118 *uint_ptr = STATS_GET(mib2.ipreasmreqds);
119 return sizeof(*uint_ptr);
120 case 15: /* ipReasmOKs */
121 *uint_ptr = STATS_GET(mib2.ipreasmoks);
122 return sizeof(*uint_ptr);
123 case 16: /* ipReasmFails */
124 *uint_ptr = STATS_GET(mib2.ipreasmfails);
125 return sizeof(*uint_ptr);
126 case 17: /* ipFragOKs */
127 *uint_ptr = STATS_GET(mib2.ipfragoks);
128 return sizeof(*uint_ptr);
129 case 18: /* ipFragFails */
130 *uint_ptr = STATS_GET(mib2.ipfragfails);
131 return sizeof(*uint_ptr);
132 case 19: /* ipFragCreates */
133 *uint_ptr = STATS_GET(mib2.ipfragcreates);
134 return sizeof(*uint_ptr);
135 case 23: /* ipRoutingDiscards: not supported -> always 0 */
136 *uint_ptr = 0;
137 return sizeof(*uint_ptr);
138 default:
139 LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_get_value(): unknown id: %"S32_F"\n", instance->node->oid));
140 break;
141 }
142
143 return 0;
144 }
145
146 /**
147 * Test ip object value before setting.
148 *
149 * @param instance node instance
150 * @param len return value space (in bytes)
151 * @param value points to (varbind) space to copy value from.
152 *
153 * @note we allow set if the value matches the hardwired value,
154 * otherwise return badvalue.
155 */
156 static snmp_err_t
ip_set_test(struct snmp_node_instance * instance,u16_t len,void * value)157 ip_set_test(struct snmp_node_instance* instance, u16_t len, void *value)
158 {
159 snmp_err_t ret = SNMP_ERR_WRONGVALUE;
160 s32_t *sint_ptr = (s32_t*)value;
161
162 LWIP_UNUSED_ARG(len);
163 switch (instance->node->oid) {
164 case 1: /* ipForwarding */
165 #if IP_FORWARD
166 /* forwarding */
167 if (*sint_ptr == 1)
168 #else
169 /* not-forwarding */
170 if (*sint_ptr == 2)
171 #endif
172 {
173 ret = SNMP_ERR_NOERROR;
174 }
175 break;
176 case 2: /* ipDefaultTTL */
177 if (*sint_ptr == IP_DEFAULT_TTL) {
178 ret = SNMP_ERR_NOERROR;
179 }
180 break;
181 default:
182 LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_set_test(): unknown id: %"S32_F"\n", instance->node->oid));
183 break;
184 }
185
186 return ret;
187 }
188
189 static snmp_err_t
ip_set_value(struct snmp_node_instance * instance,u16_t len,void * value)190 ip_set_value(struct snmp_node_instance* instance, u16_t len, void *value)
191 {
192 LWIP_UNUSED_ARG(instance);
193 LWIP_UNUSED_ARG(len);
194 LWIP_UNUSED_ARG(value);
195 /* nothing to do here because in set_test we only accept values being the same as our own stored value -> no need to store anything */
196 return SNMP_ERR_NOERROR;
197 }
198
199 /* --- ipAddrTable --- */
200
201 /* list of allowed value ranges for incoming OID */
202 static const struct snmp_oid_range ip_AddrTable_oid_ranges[] = {
203 { 0, 0xff }, /* IP A */
204 { 0, 0xff }, /* IP B */
205 { 0, 0xff }, /* IP C */
206 { 0, 0xff } /* IP D */
207 };
208
209 static snmp_err_t
ip_AddrTable_get_cell_value_core(struct netif * netif,const u32_t * column,union snmp_variant_value * value,u32_t * value_len)210 ip_AddrTable_get_cell_value_core(struct netif *netif, const u32_t* column, union snmp_variant_value* value, u32_t* value_len)
211 {
212 LWIP_UNUSED_ARG(value_len);
213
214 switch (*column) {
215 case 1: /* ipAdEntAddr */
216 value->u32 = netif_ip4_addr(netif)->addr;
217 break;
218 case 2: /* ipAdEntIfIndex */
219 value->u32 = netif_to_num(netif);
220 break;
221 case 3: /* ipAdEntNetMask */
222 value->u32 = netif_ip4_netmask(netif)->addr;
223 break;
224 case 4: /* ipAdEntBcastAddr */
225 /* lwIP oddity, there's no broadcast
226 address in the netif we can rely on */
227 value->u32 = IPADDR_BROADCAST & 1;
228 break;
229 case 5: /* ipAdEntReasmMaxSize */
230 #if IP_REASSEMBLY
231 /* @todo The theoretical maximum is IP_REASS_MAX_PBUFS * size of the pbufs,
232 * but only if receiving one fragmented packet at a time.
233 * The current solution is to calculate for 2 simultaneous packets...
234 */
235 value->u32 = (IP_HLEN + ((IP_REASS_MAX_PBUFS/2) *
236 (PBUF_POOL_BUFSIZE - PBUF_LINK_ENCAPSULATION_HLEN - PBUF_LINK_HLEN - IP_HLEN)));
237 #else
238 /** @todo returning MTU would be a bad thing and
239 returning a wild guess like '576' isn't good either */
240 value->u32 = 0;
241 #endif
242 break;
243 default:
244 return SNMP_ERR_NOSUCHINSTANCE;
245 }
246
247 return SNMP_ERR_NOERROR;
248 }
249
250 static snmp_err_t
ip_AddrTable_get_cell_value(const u32_t * column,const u32_t * row_oid,u8_t row_oid_len,union snmp_variant_value * value,u32_t * value_len)251 ip_AddrTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len)
252 {
253 ip4_addr_t ip;
254 struct netif *netif;
255
256 /* check if incoming OID length and if values are in plausible range */
257 if (!snmp_oid_in_range(row_oid, row_oid_len, ip_AddrTable_oid_ranges, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges))) {
258 return SNMP_ERR_NOSUCHINSTANCE;
259 }
260
261 /* get IP from incoming OID */
262 snmp_oid_to_ip4(&row_oid[0], &ip); /* we know it succeeds because of oid_in_range check above */
263
264 /* find netif with requested ip */
265 netif = netif_list;
266 while (netif != NULL) {
267 if (ip4_addr_cmp(&ip, netif_ip4_addr(netif))) {
268 /* fill in object properties */
269 return ip_AddrTable_get_cell_value_core(netif, column, value, value_len);
270 }
271
272 netif = netif->next;
273 }
274
275 /* not found */
276 return SNMP_ERR_NOSUCHINSTANCE;
277 }
278
279 static snmp_err_t
ip_AddrTable_get_next_cell_instance_and_value(const u32_t * column,struct snmp_obj_id * row_oid,union snmp_variant_value * value,u32_t * value_len)280 ip_AddrTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len)
281 {
282 struct netif *netif;
283 struct snmp_next_oid_state state;
284 u32_t result_temp[LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)];
285
286 /* init struct to search next oid */
287 snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges));
288
289 /* iterate over all possible OIDs to find the next one */
290 netif = netif_list;
291 while (netif != NULL) {
292 u32_t test_oid[LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)];
293 snmp_ip4_to_oid(netif_ip4_addr(netif), &test_oid[0]);
294
295 /* check generated OID: is it a candidate for the next one? */
296 snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges), netif);
297
298 netif = netif->next;
299 }
300
301 /* did we find a next one? */
302 if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) {
303 snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len);
304 /* fill in object properties */
305 return ip_AddrTable_get_cell_value_core((struct netif*)state.reference, column, value, value_len);
306 }
307
308 /* not found */
309 return SNMP_ERR_NOSUCHINSTANCE;
310 }
311
312 /* --- ipRouteTable --- */
313
314 /* list of allowed value ranges for incoming OID */
315 static const struct snmp_oid_range ip_RouteTable_oid_ranges[] = {
316 { 0, 0xff }, /* IP A */
317 { 0, 0xff }, /* IP B */
318 { 0, 0xff }, /* IP C */
319 { 0, 0xff }, /* IP D */
320 };
321
322 static snmp_err_t
ip_RouteTable_get_cell_value_core(struct netif * netif,u8_t default_route,const u32_t * column,union snmp_variant_value * value,u32_t * value_len)323 ip_RouteTable_get_cell_value_core(struct netif *netif, u8_t default_route, const u32_t* column, union snmp_variant_value* value, u32_t* value_len)
324 {
325 switch (*column) {
326 case 1: /* ipRouteDest */
327 if (default_route) {
328 /* default rte has 0.0.0.0 dest */
329 value->u32 = IP4_ADDR_ANY4->addr;
330 } else {
331 /* netifs have netaddress dest */
332 ip4_addr_t tmp;
333 ip4_addr_get_network(&tmp, netif_ip4_addr(netif), netif_ip4_netmask(netif));
334 value->u32 = tmp.addr;
335 }
336 break;
337 case 2: /* ipRouteIfIndex */
338 value->u32 = netif_to_num(netif);
339 break;
340 case 3: /* ipRouteMetric1 */
341 if (default_route) {
342 value->s32 = 1; /* default */
343 } else {
344 value->s32 = 0; /* normal */
345 }
346 break;
347 case 4: /* ipRouteMetric2 */
348 case 5: /* ipRouteMetric3 */
349 case 6: /* ipRouteMetric4 */
350 value->s32 = -1; /* none */
351 break;
352 case 7: /* ipRouteNextHop */
353 if (default_route) {
354 /* default rte: gateway */
355 value->u32 = netif_ip4_gw(netif)->addr;
356 } else {
357 /* other rtes: netif ip_addr */
358 value->u32 = netif_ip4_addr(netif)->addr;
359 }
360 break;
361 case 8: /* ipRouteType */
362 if (default_route) {
363 /* default rte is indirect */
364 value->u32 = 4; /* indirect */
365 } else {
366 /* other rtes are direct */
367 value->u32 = 3; /* direct */
368 }
369 break;
370 case 9: /* ipRouteProto */
371 /* locally defined routes */
372 value->u32 = 2; /* local */
373 break;
374 case 10: /* ipRouteAge */
375 /* @todo (sysuptime - timestamp last change) / 100 */
376 value->u32 = 0;
377 break;
378 case 11: /* ipRouteMask */
379 if (default_route) {
380 /* default rte use 0.0.0.0 mask */
381 value->u32 = IP4_ADDR_ANY4->addr;
382 } else {
383 /* other rtes use netmask */
384 value->u32 = netif_ip4_netmask(netif)->addr;
385 }
386 break;
387 case 12: /* ipRouteMetric5 */
388 value->s32 = -1; /* none */
389 break;
390 case 13: /* ipRouteInfo */
391 value->const_ptr = snmp_zero_dot_zero.id;
392 *value_len = snmp_zero_dot_zero.len * sizeof(u32_t);
393 break;
394 default:
395 return SNMP_ERR_NOSUCHINSTANCE;
396 }
397
398 return SNMP_ERR_NOERROR;
399 }
400
401 static snmp_err_t
ip_RouteTable_get_cell_value(const u32_t * column,const u32_t * row_oid,u8_t row_oid_len,union snmp_variant_value * value,u32_t * value_len)402 ip_RouteTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len)
403 {
404 ip4_addr_t test_ip;
405 struct netif *netif;
406
407 /* check if incoming OID length and if values are in plausible range */
408 if (!snmp_oid_in_range(row_oid, row_oid_len, ip_RouteTable_oid_ranges, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges))) {
409 return SNMP_ERR_NOSUCHINSTANCE;
410 }
411
412 /* get IP and port from incoming OID */
413 snmp_oid_to_ip4(&row_oid[0], &test_ip); /* we know it succeeds because of oid_in_range check above */
414
415 /* default route is on default netif */
416 if (ip4_addr_isany_val(test_ip) && (netif_default != NULL)) {
417 /* fill in object properties */
418 return ip_RouteTable_get_cell_value_core(netif_default, 1, column, value, value_len);
419 }
420
421 /* find netif with requested route */
422 netif = netif_list;
423 while (netif != NULL) {
424 ip4_addr_t dst;
425 ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif));
426
427 if (ip4_addr_cmp(&dst, &test_ip)) {
428 /* fill in object properties */
429 return ip_RouteTable_get_cell_value_core(netif, 0, column, value, value_len);
430 }
431
432 netif = netif->next;
433 }
434
435 /* not found */
436 return SNMP_ERR_NOSUCHINSTANCE;
437 }
438
439 static snmp_err_t
ip_RouteTable_get_next_cell_instance_and_value(const u32_t * column,struct snmp_obj_id * row_oid,union snmp_variant_value * value,u32_t * value_len)440 ip_RouteTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len)
441 {
442 struct netif *netif;
443 struct snmp_next_oid_state state;
444 u32_t result_temp[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)];
445 u32_t test_oid[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)];
446
447 /* init struct to search next oid */
448 snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges));
449
450 /* check default route */
451 if (netif_default != NULL) {
452 snmp_ip4_to_oid(IP4_ADDR_ANY4, &test_oid[0]);
453 snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif_default);
454 }
455
456 /* iterate over all possible OIDs to find the next one */
457 netif = netif_list;
458 while (netif != NULL) {
459 ip4_addr_t dst;
460 ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif));
461
462 /* check generated OID: is it a candidate for the next one? */
463 if (!ip4_addr_isany_val(dst)) {
464 snmp_ip4_to_oid(&dst, &test_oid[0]);
465 snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif);
466 }
467
468 netif = netif->next;
469 }
470
471 /* did we find a next one? */
472 if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) {
473 ip4_addr_t dst;
474 snmp_oid_to_ip4(&result_temp[0], &dst);
475 snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len);
476 /* fill in object properties */
477 return ip_RouteTable_get_cell_value_core((struct netif*)state.reference, ip4_addr_isany_val(dst), column, value, value_len);
478 } else {
479 /* not found */
480 return SNMP_ERR_NOSUCHINSTANCE;
481 }
482 }
483
484 #if LWIP_ARP && LWIP_IPV4
485 /* --- ipNetToMediaTable --- */
486
487 /* list of allowed value ranges for incoming OID */
488 static const struct snmp_oid_range ip_NetToMediaTable_oid_ranges[] = {
489 { 1, 0xff }, /* IfIndex */
490 { 0, 0xff }, /* IP A */
491 { 0, 0xff }, /* IP B */
492 { 0, 0xff }, /* IP C */
493 { 0, 0xff } /* IP D */
494 };
495
496 static snmp_err_t
ip_NetToMediaTable_get_cell_value_core(u8_t arp_table_index,const u32_t * column,union snmp_variant_value * value,u32_t * value_len)497 ip_NetToMediaTable_get_cell_value_core(u8_t arp_table_index, const u32_t* column, union snmp_variant_value* value, u32_t* value_len)
498 {
499 ip4_addr_t *ip;
500 struct netif *netif;
501 struct eth_addr *ethaddr;
502
503 etharp_get_entry(arp_table_index, &ip, &netif, ðaddr);
504
505 /* value */
506 switch (*column) {
507 case 1: /* atIfIndex / ipNetToMediaIfIndex */
508 value->u32 = netif_to_num(netif);
509 break;
510 case 2: /* atPhysAddress / ipNetToMediaPhysAddress */
511 value->ptr = ethaddr;
512 *value_len = sizeof(*ethaddr);
513 break;
514 case 3: /* atNetAddress / ipNetToMediaNetAddress */
515 value->u32 = ip->addr;
516 break;
517 case 4: /* ipNetToMediaType */
518 value->u32 = 3; /* dynamic*/
519 break;
520 default:
521 return SNMP_ERR_NOSUCHINSTANCE;
522 }
523
524 return SNMP_ERR_NOERROR;
525 }
526
527 static snmp_err_t
ip_NetToMediaTable_get_cell_value(const u32_t * column,const u32_t * row_oid,u8_t row_oid_len,union snmp_variant_value * value,u32_t * value_len)528 ip_NetToMediaTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len)
529 {
530 ip4_addr_t ip_in;
531 u8_t netif_index;
532 u8_t i;
533
534 /* check if incoming OID length and if values are in plausible range */
535 if (!snmp_oid_in_range(row_oid, row_oid_len, ip_NetToMediaTable_oid_ranges, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges))) {
536 return SNMP_ERR_NOSUCHINSTANCE;
537 }
538
539 /* get IP from incoming OID */
540 netif_index = (u8_t)row_oid[0];
541 snmp_oid_to_ip4(&row_oid[1], &ip_in); /* we know it succeeds because of oid_in_range check above */
542
543 /* find requested entry */
544 for (i=0; i<ARP_TABLE_SIZE; i++) {
545 ip4_addr_t *ip;
546 struct netif *netif;
547 struct eth_addr *ethaddr;
548
549 if (etharp_get_entry(i, &ip, &netif, ðaddr)) {
550 if ((netif_index == netif_to_num(netif)) && ip4_addr_cmp(&ip_in, ip)) {
551 /* fill in object properties */
552 return ip_NetToMediaTable_get_cell_value_core(i, column, value, value_len);
553 }
554 }
555 }
556
557 /* not found */
558 return SNMP_ERR_NOSUCHINSTANCE;
559 }
560
561 static snmp_err_t
ip_NetToMediaTable_get_next_cell_instance_and_value(const u32_t * column,struct snmp_obj_id * row_oid,union snmp_variant_value * value,u32_t * value_len)562 ip_NetToMediaTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len)
563 {
564 u8_t i;
565 struct snmp_next_oid_state state;
566 u32_t result_temp[LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)];
567
568 /* init struct to search next oid */
569 snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges));
570
571 /* iterate over all possible OIDs to find the next one */
572 for (i=0; i<ARP_TABLE_SIZE; i++) {
573 ip4_addr_t *ip;
574 struct netif *netif;
575 struct eth_addr *ethaddr;
576
577 if (etharp_get_entry(i, &ip, &netif, ðaddr)) {
578 u32_t test_oid[LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)];
579
580 test_oid[0] = netif_to_num(netif);
581 snmp_ip4_to_oid(ip, &test_oid[1]);
582
583 /* check generated OID: is it a candidate for the next one? */
584 snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges), (void*)(size_t)i);
585 }
586 }
587
588 /* did we find a next one? */
589 if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) {
590 snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len);
591 /* fill in object properties */
592 return ip_NetToMediaTable_get_cell_value_core((u8_t)(size_t)state.reference, column, value, value_len);
593 }
594
595 /* not found */
596 return SNMP_ERR_NOSUCHINSTANCE;
597 }
598
599 #endif /* LWIP_ARP && LWIP_IPV4 */
600
601 static const struct snmp_scalar_node ip_Forwarding = SNMP_SCALAR_CREATE_NODE(1, SNMP_NODE_INSTANCE_READ_WRITE, SNMP_ASN1_TYPE_INTEGER, ip_get_value, ip_set_test, ip_set_value);
602 static const struct snmp_scalar_node ip_DefaultTTL = SNMP_SCALAR_CREATE_NODE(2, SNMP_NODE_INSTANCE_READ_WRITE, SNMP_ASN1_TYPE_INTEGER, ip_get_value, ip_set_test, ip_set_value);
603 static const struct snmp_scalar_node ip_InReceives = SNMP_SCALAR_CREATE_NODE_READONLY(3, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
604 static const struct snmp_scalar_node ip_InHdrErrors = SNMP_SCALAR_CREATE_NODE_READONLY(4, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
605 static const struct snmp_scalar_node ip_InAddrErrors = SNMP_SCALAR_CREATE_NODE_READONLY(5, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
606 static const struct snmp_scalar_node ip_ForwDatagrams = SNMP_SCALAR_CREATE_NODE_READONLY(6, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
607 static const struct snmp_scalar_node ip_InUnknownProtos = SNMP_SCALAR_CREATE_NODE_READONLY(7, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
608 static const struct snmp_scalar_node ip_InDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(8, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
609 static const struct snmp_scalar_node ip_InDelivers = SNMP_SCALAR_CREATE_NODE_READONLY(9, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
610 static const struct snmp_scalar_node ip_OutRequests = SNMP_SCALAR_CREATE_NODE_READONLY(10, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
611 static const struct snmp_scalar_node ip_OutDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(11, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
612 static const struct snmp_scalar_node ip_OutNoRoutes = SNMP_SCALAR_CREATE_NODE_READONLY(12, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
613 static const struct snmp_scalar_node ip_ReasmTimeout = SNMP_SCALAR_CREATE_NODE_READONLY(13, SNMP_ASN1_TYPE_INTEGER, ip_get_value);
614 static const struct snmp_scalar_node ip_ReasmReqds = SNMP_SCALAR_CREATE_NODE_READONLY(14, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
615 static const struct snmp_scalar_node ip_ReasmOKs = SNMP_SCALAR_CREATE_NODE_READONLY(15, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
616 static const struct snmp_scalar_node ip_ReasmFails = SNMP_SCALAR_CREATE_NODE_READONLY(16, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
617 static const struct snmp_scalar_node ip_FragOKs = SNMP_SCALAR_CREATE_NODE_READONLY(17, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
618 static const struct snmp_scalar_node ip_FragFails = SNMP_SCALAR_CREATE_NODE_READONLY(18, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
619 static const struct snmp_scalar_node ip_FragCreates = SNMP_SCALAR_CREATE_NODE_READONLY(19, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
620 static const struct snmp_scalar_node ip_RoutingDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(23, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
621
622 static const struct snmp_table_simple_col_def ip_AddrTable_columns[] = {
623 { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntAddr */
624 { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntIfIndex */
625 { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntNetMask */
626 { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntBcastAddr */
627 { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* ipAdEntReasmMaxSize */
628 };
629
630 static const struct snmp_table_simple_node ip_AddrTable = SNMP_TABLE_CREATE_SIMPLE(20, ip_AddrTable_columns, ip_AddrTable_get_cell_value, ip_AddrTable_get_next_cell_instance_and_value);
631
632 static const struct snmp_table_simple_col_def ip_RouteTable_columns[] = {
633 { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteDest */
634 { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteIfIndex */
635 { 3, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric1 */
636 { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric2 */
637 { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric3 */
638 { 6, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric4 */
639 { 7, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteNextHop */
640 { 8, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteType */
641 { 9, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteProto */
642 { 10, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteAge */
643 { 11, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteMask */
644 { 12, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric5 */
645 { 13, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_VARIANT_VALUE_TYPE_PTR } /* ipRouteInfo */
646 };
647
648 static const struct snmp_table_simple_node ip_RouteTable = SNMP_TABLE_CREATE_SIMPLE(21, ip_RouteTable_columns, ip_RouteTable_get_cell_value, ip_RouteTable_get_next_cell_instance_and_value);
649 #endif /* LWIP_IPV4 */
650
651 #if LWIP_ARP && LWIP_IPV4
652 static const struct snmp_table_simple_col_def ip_NetToMediaTable_columns[] = {
653 { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipNetToMediaIfIndex */
654 { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_VARIANT_VALUE_TYPE_PTR }, /* ipNetToMediaPhysAddress */
655 { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipNetToMediaNetAddress */
656 { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* ipNetToMediaType */
657 };
658
659 static const struct snmp_table_simple_node ip_NetToMediaTable = SNMP_TABLE_CREATE_SIMPLE(22, ip_NetToMediaTable_columns, ip_NetToMediaTable_get_cell_value, ip_NetToMediaTable_get_next_cell_instance_and_value);
660 #endif /* LWIP_ARP && LWIP_IPV4 */
661
662 #if LWIP_IPV4
663 /* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */
664 CREATE_LWIP_SYNC_NODE( 1, ip_Forwarding)
665 CREATE_LWIP_SYNC_NODE( 2, ip_DefaultTTL)
666 CREATE_LWIP_SYNC_NODE( 3, ip_InReceives)
667 CREATE_LWIP_SYNC_NODE( 4, ip_InHdrErrors)
668 CREATE_LWIP_SYNC_NODE( 5, ip_InAddrErrors)
669 CREATE_LWIP_SYNC_NODE( 6, ip_ForwDatagrams)
670 CREATE_LWIP_SYNC_NODE( 7, ip_InUnknownProtos)
671 CREATE_LWIP_SYNC_NODE( 8, ip_InDiscards)
672 CREATE_LWIP_SYNC_NODE( 9, ip_InDelivers)
673 CREATE_LWIP_SYNC_NODE(10, ip_OutRequests)
674 CREATE_LWIP_SYNC_NODE(11, ip_OutDiscards)
675 CREATE_LWIP_SYNC_NODE(12, ip_OutNoRoutes)
676 CREATE_LWIP_SYNC_NODE(13, ip_ReasmTimeout)
677 CREATE_LWIP_SYNC_NODE(14, ip_ReasmReqds)
678 CREATE_LWIP_SYNC_NODE(15, ip_ReasmOKs)
679 CREATE_LWIP_SYNC_NODE(15, ip_ReasmFails)
680 CREATE_LWIP_SYNC_NODE(17, ip_FragOKs)
681 CREATE_LWIP_SYNC_NODE(18, ip_FragFails)
682 CREATE_LWIP_SYNC_NODE(19, ip_FragCreates)
683 CREATE_LWIP_SYNC_NODE(20, ip_AddrTable)
684 CREATE_LWIP_SYNC_NODE(21, ip_RouteTable)
685 #if LWIP_ARP
686 CREATE_LWIP_SYNC_NODE(22, ip_NetToMediaTable)
687 #endif /* LWIP_ARP */
688 CREATE_LWIP_SYNC_NODE(23, ip_RoutingDiscards)
689
690 static const struct snmp_node* const ip_nodes[] = {
691 &SYNC_NODE_NAME(ip_Forwarding).node.node,
692 &SYNC_NODE_NAME(ip_DefaultTTL).node.node,
693 &SYNC_NODE_NAME(ip_InReceives).node.node,
694 &SYNC_NODE_NAME(ip_InHdrErrors).node.node,
695 &SYNC_NODE_NAME(ip_InAddrErrors).node.node,
696 &SYNC_NODE_NAME(ip_ForwDatagrams).node.node,
697 &SYNC_NODE_NAME(ip_InUnknownProtos).node.node,
698 &SYNC_NODE_NAME(ip_InDiscards).node.node,
699 &SYNC_NODE_NAME(ip_InDelivers).node.node,
700 &SYNC_NODE_NAME(ip_OutRequests).node.node,
701 &SYNC_NODE_NAME(ip_OutDiscards).node.node,
702 &SYNC_NODE_NAME(ip_OutNoRoutes).node.node,
703 &SYNC_NODE_NAME(ip_ReasmTimeout).node.node,
704 &SYNC_NODE_NAME(ip_ReasmReqds).node.node,
705 &SYNC_NODE_NAME(ip_ReasmOKs).node.node,
706 &SYNC_NODE_NAME(ip_ReasmFails).node.node,
707 &SYNC_NODE_NAME(ip_FragOKs).node.node,
708 &SYNC_NODE_NAME(ip_FragFails).node.node,
709 &SYNC_NODE_NAME(ip_FragCreates).node.node,
710 &SYNC_NODE_NAME(ip_AddrTable).node.node,
711 &SYNC_NODE_NAME(ip_RouteTable).node.node,
712 #if LWIP_ARP
713 &SYNC_NODE_NAME(ip_NetToMediaTable).node.node,
714 #endif /* LWIP_ARP */
715 &SYNC_NODE_NAME(ip_RoutingDiscards).node.node
716 };
717
718 const struct snmp_tree_node snmp_mib2_ip_root = SNMP_CREATE_TREE_NODE(4, ip_nodes);
719 #endif /* LWIP_IPV4 */
720
721 /* --- at .1.3.6.1.2.1.3 ----------------------------------------------------- */
722
723 #if LWIP_ARP && LWIP_IPV4
724 /* at node table is a subset of ip_nettomedia table (same rows but less columns) */
725 static const struct snmp_table_simple_col_def at_Table_columns[] = {
726 { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* atIfIndex */
727 { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_VARIANT_VALUE_TYPE_PTR }, /* atPhysAddress */
728 { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 } /* atNetAddress */
729 };
730
731 static const struct snmp_table_simple_node at_Table = SNMP_TABLE_CREATE_SIMPLE(1, at_Table_columns, ip_NetToMediaTable_get_cell_value, ip_NetToMediaTable_get_next_cell_instance_and_value);
732
733 /* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */
734 CREATE_LWIP_SYNC_NODE(1, at_Table)
735
736 static const struct snmp_node* const at_nodes[] = {
737 &SYNC_NODE_NAME(at_Table).node.node
738 };
739
740 const struct snmp_tree_node snmp_mib2_at_root = SNMP_CREATE_TREE_NODE(3, at_nodes);
741 #endif /* LWIP_ARP && LWIP_IPV4 */
742
743 #endif /* LWIP_SNMP && SNMP_LWIP_MIB2 */
744