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1 office 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
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
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
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
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
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_FOREACH(netif) {
266 if (ip4_addr_cmp(&ip, netif_ip4_addr(netif))) {
267 /* fill in object properties */
268 return ip_AddrTable_get_cell_value_core(netif, column, value, value_len);
269 }
270 }
271  
272 /* not found */
273 return SNMP_ERR_NOSUCHINSTANCE;
274 }
275  
276 static snmp_err_t
277 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)
278 {
279 struct netif *netif;
280 struct snmp_next_oid_state state;
281 u32_t result_temp[LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)];
282  
283 /* init struct to search next oid */
284 snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges));
285  
286 /* iterate over all possible OIDs to find the next one */
287 NETIF_FOREACH(netif) {
288 u32_t test_oid[LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)];
289 snmp_ip4_to_oid(netif_ip4_addr(netif), &test_oid[0]);
290  
291 /* check generated OID: is it a candidate for the next one? */
292 snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges), netif);
293 }
294  
295 /* did we find a next one? */
296 if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) {
297 snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len);
298 /* fill in object properties */
299 return ip_AddrTable_get_cell_value_core((struct netif *)state.reference, column, value, value_len);
300 }
301  
302 /* not found */
303 return SNMP_ERR_NOSUCHINSTANCE;
304 }
305  
306 /* --- ipRouteTable --- */
307  
308 /* list of allowed value ranges for incoming OID */
309 static const struct snmp_oid_range ip_RouteTable_oid_ranges[] = {
310 { 0, 0xff }, /* IP A */
311 { 0, 0xff }, /* IP B */
312 { 0, 0xff }, /* IP C */
313 { 0, 0xff }, /* IP D */
314 };
315  
316 static snmp_err_t
317 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)
318 {
319 switch (*column) {
320 case 1: /* ipRouteDest */
321 if (default_route) {
322 /* default rte has 0.0.0.0 dest */
323 value->u32 = IP4_ADDR_ANY4->addr;
324 } else {
325 /* netifs have netaddress dest */
326 ip4_addr_t tmp;
327 ip4_addr_get_network(&tmp, netif_ip4_addr(netif), netif_ip4_netmask(netif));
328 value->u32 = tmp.addr;
329 }
330 break;
331 case 2: /* ipRouteIfIndex */
332 value->u32 = netif_to_num(netif);
333 break;
334 case 3: /* ipRouteMetric1 */
335 if (default_route) {
336 value->s32 = 1; /* default */
337 } else {
338 value->s32 = 0; /* normal */
339 }
340 break;
341 case 4: /* ipRouteMetric2 */
342 case 5: /* ipRouteMetric3 */
343 case 6: /* ipRouteMetric4 */
344 value->s32 = -1; /* none */
345 break;
346 case 7: /* ipRouteNextHop */
347 if (default_route) {
348 /* default rte: gateway */
349 value->u32 = netif_ip4_gw(netif)->addr;
350 } else {
351 /* other rtes: netif ip_addr */
352 value->u32 = netif_ip4_addr(netif)->addr;
353 }
354 break;
355 case 8: /* ipRouteType */
356 if (default_route) {
357 /* default rte is indirect */
358 value->u32 = 4; /* indirect */
359 } else {
360 /* other rtes are direct */
361 value->u32 = 3; /* direct */
362 }
363 break;
364 case 9: /* ipRouteProto */
365 /* locally defined routes */
366 value->u32 = 2; /* local */
367 break;
368 case 10: /* ipRouteAge */
369 /* @todo (sysuptime - timestamp last change) / 100 */
370 value->u32 = 0;
371 break;
372 case 11: /* ipRouteMask */
373 if (default_route) {
374 /* default rte use 0.0.0.0 mask */
375 value->u32 = IP4_ADDR_ANY4->addr;
376 } else {
377 /* other rtes use netmask */
378 value->u32 = netif_ip4_netmask(netif)->addr;
379 }
380 break;
381 case 12: /* ipRouteMetric5 */
382 value->s32 = -1; /* none */
383 break;
384 case 13: /* ipRouteInfo */
385 value->const_ptr = snmp_zero_dot_zero.id;
386 *value_len = snmp_zero_dot_zero.len * sizeof(u32_t);
387 break;
388 default:
389 return SNMP_ERR_NOSUCHINSTANCE;
390 }
391  
392 return SNMP_ERR_NOERROR;
393 }
394  
395 static snmp_err_t
396 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)
397 {
398 ip4_addr_t test_ip;
399 struct netif *netif;
400  
401 /* check if incoming OID length and if values are in plausible range */
402 if (!snmp_oid_in_range(row_oid, row_oid_len, ip_RouteTable_oid_ranges, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges))) {
403 return SNMP_ERR_NOSUCHINSTANCE;
404 }
405  
406 /* get IP and port from incoming OID */
407 snmp_oid_to_ip4(&row_oid[0], &test_ip); /* we know it succeeds because of oid_in_range check above */
408  
409 /* default route is on default netif */
410 if (ip4_addr_isany_val(test_ip) && (netif_default != NULL)) {
411 /* fill in object properties */
412 return ip_RouteTable_get_cell_value_core(netif_default, 1, column, value, value_len);
413 }
414  
415 /* find netif with requested route */
416 NETIF_FOREACH(netif) {
417 ip4_addr_t dst;
418 ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif));
419  
420 if (ip4_addr_cmp(&dst, &test_ip)) {
421 /* fill in object properties */
422 return ip_RouteTable_get_cell_value_core(netif, 0, column, value, value_len);
423 }
424 }
425  
426 /* not found */
427 return SNMP_ERR_NOSUCHINSTANCE;
428 }
429  
430 static snmp_err_t
431 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)
432 {
433 struct netif *netif;
434 struct snmp_next_oid_state state;
435 u32_t result_temp[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)];
436 u32_t test_oid[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)];
437  
438 /* init struct to search next oid */
439 snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges));
440  
441 /* check default route */
442 if (netif_default != NULL) {
443 snmp_ip4_to_oid(IP4_ADDR_ANY4, &test_oid[0]);
444 snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif_default);
445 }
446  
447 /* iterate over all possible OIDs to find the next one */
448 NETIF_FOREACH(netif) {
449 ip4_addr_t dst;
450 ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif));
451  
452 /* check generated OID: is it a candidate for the next one? */
453 if (!ip4_addr_isany_val(dst)) {
454 snmp_ip4_to_oid(&dst, &test_oid[0]);
455 snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif);
456 }
457 }
458  
459 /* did we find a next one? */
460 if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) {
461 ip4_addr_t dst;
462 snmp_oid_to_ip4(&result_temp[0], &dst);
463 snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len);
464 /* fill in object properties */
465 return ip_RouteTable_get_cell_value_core((struct netif *)state.reference, ip4_addr_isany_val(dst), column, value, value_len);
466 } else {
467 /* not found */
468 return SNMP_ERR_NOSUCHINSTANCE;
469 }
470 }
471  
472 #if LWIP_ARP && LWIP_IPV4
473 /* --- ipNetToMediaTable --- */
474  
475 /* list of allowed value ranges for incoming OID */
476 static const struct snmp_oid_range ip_NetToMediaTable_oid_ranges[] = {
477 { 1, 0xff }, /* IfIndex */
478 { 0, 0xff }, /* IP A */
479 { 0, 0xff }, /* IP B */
480 { 0, 0xff }, /* IP C */
481 { 0, 0xff } /* IP D */
482 };
483  
484 static snmp_err_t
485 ip_NetToMediaTable_get_cell_value_core(u8_t arp_table_index, const u32_t *column, union snmp_variant_value *value, u32_t *value_len)
486 {
487 ip4_addr_t *ip;
488 struct netif *netif;
489 struct eth_addr *ethaddr;
490  
491 etharp_get_entry(arp_table_index, &ip, &netif, &ethaddr);
492  
493 /* value */
494 switch (*column) {
495 case 1: /* atIfIndex / ipNetToMediaIfIndex */
496 value->u32 = netif_to_num(netif);
497 break;
498 case 2: /* atPhysAddress / ipNetToMediaPhysAddress */
499 value->ptr = ethaddr;
500 *value_len = sizeof(*ethaddr);
501 break;
502 case 3: /* atNetAddress / ipNetToMediaNetAddress */
503 value->u32 = ip->addr;
504 break;
505 case 4: /* ipNetToMediaType */
506 value->u32 = 3; /* dynamic*/
507 break;
508 default:
509 return SNMP_ERR_NOSUCHINSTANCE;
510 }
511  
512 return SNMP_ERR_NOERROR;
513 }
514  
515 static snmp_err_t
516 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)
517 {
518 ip4_addr_t ip_in;
519 u8_t netif_index;
520 u8_t i;
521  
522 /* check if incoming OID length and if values are in plausible range */
523 if (!snmp_oid_in_range(row_oid, row_oid_len, ip_NetToMediaTable_oid_ranges, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges))) {
524 return SNMP_ERR_NOSUCHINSTANCE;
525 }
526  
527 /* get IP from incoming OID */
528 netif_index = (u8_t)row_oid[0];
529 snmp_oid_to_ip4(&row_oid[1], &ip_in); /* we know it succeeds because of oid_in_range check above */
530  
531 /* find requested entry */
532 for (i = 0; i < ARP_TABLE_SIZE; i++) {
533 ip4_addr_t *ip;
534 struct netif *netif;
535 struct eth_addr *ethaddr;
536  
537 if (etharp_get_entry(i, &ip, &netif, &ethaddr)) {
538 if ((netif_index == netif_to_num(netif)) && ip4_addr_cmp(&ip_in, ip)) {
539 /* fill in object properties */
540 return ip_NetToMediaTable_get_cell_value_core(i, column, value, value_len);
541 }
542 }
543 }
544  
545 /* not found */
546 return SNMP_ERR_NOSUCHINSTANCE;
547 }
548  
549 static snmp_err_t
550 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)
551 {
552 u8_t i;
553 struct snmp_next_oid_state state;
554 u32_t result_temp[LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)];
555  
556 /* init struct to search next oid */
557 snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges));
558  
559 /* iterate over all possible OIDs to find the next one */
560 for (i = 0; i < ARP_TABLE_SIZE; i++) {
561 ip4_addr_t *ip;
562 struct netif *netif;
563 struct eth_addr *ethaddr;
564  
565 if (etharp_get_entry(i, &ip, &netif, &ethaddr)) {
566 u32_t test_oid[LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)];
567  
568 test_oid[0] = netif_to_num(netif);
569 snmp_ip4_to_oid(ip, &test_oid[1]);
570  
571 /* check generated OID: is it a candidate for the next one? */
572 snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges), LWIP_PTR_NUMERIC_CAST(void *, i));
573 }
574 }
575  
576 /* did we find a next one? */
577 if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) {
578 snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len);
579 /* fill in object properties */
580 return ip_NetToMediaTable_get_cell_value_core(LWIP_PTR_NUMERIC_CAST(u8_t, state.reference), column, value, value_len);
581 }
582  
583 /* not found */
584 return SNMP_ERR_NOSUCHINSTANCE;
585 }
586  
587 #endif /* LWIP_ARP && LWIP_IPV4 */
588  
589 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);
590 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);
591 static const struct snmp_scalar_node ip_InReceives = SNMP_SCALAR_CREATE_NODE_READONLY(3, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
592 static const struct snmp_scalar_node ip_InHdrErrors = SNMP_SCALAR_CREATE_NODE_READONLY(4, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
593 static const struct snmp_scalar_node ip_InAddrErrors = SNMP_SCALAR_CREATE_NODE_READONLY(5, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
594 static const struct snmp_scalar_node ip_ForwDatagrams = SNMP_SCALAR_CREATE_NODE_READONLY(6, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
595 static const struct snmp_scalar_node ip_InUnknownProtos = SNMP_SCALAR_CREATE_NODE_READONLY(7, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
596 static const struct snmp_scalar_node ip_InDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(8, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
597 static const struct snmp_scalar_node ip_InDelivers = SNMP_SCALAR_CREATE_NODE_READONLY(9, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
598 static const struct snmp_scalar_node ip_OutRequests = SNMP_SCALAR_CREATE_NODE_READONLY(10, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
599 static const struct snmp_scalar_node ip_OutDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(11, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
600 static const struct snmp_scalar_node ip_OutNoRoutes = SNMP_SCALAR_CREATE_NODE_READONLY(12, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
601 static const struct snmp_scalar_node ip_ReasmTimeout = SNMP_SCALAR_CREATE_NODE_READONLY(13, SNMP_ASN1_TYPE_INTEGER, ip_get_value);
602 static const struct snmp_scalar_node ip_ReasmReqds = SNMP_SCALAR_CREATE_NODE_READONLY(14, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
603 static const struct snmp_scalar_node ip_ReasmOKs = SNMP_SCALAR_CREATE_NODE_READONLY(15, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
604 static const struct snmp_scalar_node ip_ReasmFails = SNMP_SCALAR_CREATE_NODE_READONLY(16, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
605 static const struct snmp_scalar_node ip_FragOKs = SNMP_SCALAR_CREATE_NODE_READONLY(17, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
606 static const struct snmp_scalar_node ip_FragFails = SNMP_SCALAR_CREATE_NODE_READONLY(18, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
607 static const struct snmp_scalar_node ip_FragCreates = SNMP_SCALAR_CREATE_NODE_READONLY(19, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
608 static const struct snmp_scalar_node ip_RoutingDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(23, SNMP_ASN1_TYPE_COUNTER, ip_get_value);
609  
610 static const struct snmp_table_simple_col_def ip_AddrTable_columns[] = {
611 { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntAddr */
612 { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntIfIndex */
613 { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntNetMask */
614 { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntBcastAddr */
615 { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* ipAdEntReasmMaxSize */
616 };
617  
618 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);
619  
620 static const struct snmp_table_simple_col_def ip_RouteTable_columns[] = {
621 { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteDest */
622 { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteIfIndex */
623 { 3, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric1 */
624 { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric2 */
625 { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric3 */
626 { 6, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric4 */
627 { 7, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteNextHop */
628 { 8, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteType */
629 { 9, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteProto */
630 { 10, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteAge */
631 { 11, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteMask */
632 { 12, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric5 */
633 { 13, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_VARIANT_VALUE_TYPE_PTR } /* ipRouteInfo */
634 };
635  
636 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);
637 #endif /* LWIP_IPV4 */
638  
639 #if LWIP_ARP && LWIP_IPV4
640 static const struct snmp_table_simple_col_def ip_NetToMediaTable_columns[] = {
641 { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipNetToMediaIfIndex */
642 { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_VARIANT_VALUE_TYPE_PTR }, /* ipNetToMediaPhysAddress */
643 { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipNetToMediaNetAddress */
644 { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* ipNetToMediaType */
645 };
646  
647 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);
648 #endif /* LWIP_ARP && LWIP_IPV4 */
649  
650 #if LWIP_IPV4
651 /* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */
652 CREATE_LWIP_SYNC_NODE( 1, ip_Forwarding)
653 CREATE_LWIP_SYNC_NODE( 2, ip_DefaultTTL)
654 CREATE_LWIP_SYNC_NODE( 3, ip_InReceives)
655 CREATE_LWIP_SYNC_NODE( 4, ip_InHdrErrors)
656 CREATE_LWIP_SYNC_NODE( 5, ip_InAddrErrors)
657 CREATE_LWIP_SYNC_NODE( 6, ip_ForwDatagrams)
658 CREATE_LWIP_SYNC_NODE( 7, ip_InUnknownProtos)
659 CREATE_LWIP_SYNC_NODE( 8, ip_InDiscards)
660 CREATE_LWIP_SYNC_NODE( 9, ip_InDelivers)
661 CREATE_LWIP_SYNC_NODE(10, ip_OutRequests)
662 CREATE_LWIP_SYNC_NODE(11, ip_OutDiscards)
663 CREATE_LWIP_SYNC_NODE(12, ip_OutNoRoutes)
664 CREATE_LWIP_SYNC_NODE(13, ip_ReasmTimeout)
665 CREATE_LWIP_SYNC_NODE(14, ip_ReasmReqds)
666 CREATE_LWIP_SYNC_NODE(15, ip_ReasmOKs)
667 CREATE_LWIP_SYNC_NODE(15, ip_ReasmFails)
668 CREATE_LWIP_SYNC_NODE(17, ip_FragOKs)
669 CREATE_LWIP_SYNC_NODE(18, ip_FragFails)
670 CREATE_LWIP_SYNC_NODE(19, ip_FragCreates)
671 CREATE_LWIP_SYNC_NODE(20, ip_AddrTable)
672 CREATE_LWIP_SYNC_NODE(21, ip_RouteTable)
673 #if LWIP_ARP
674 CREATE_LWIP_SYNC_NODE(22, ip_NetToMediaTable)
675 #endif /* LWIP_ARP */
676 CREATE_LWIP_SYNC_NODE(23, ip_RoutingDiscards)
677  
678 static const struct snmp_node *const ip_nodes[] = {
679 &SYNC_NODE_NAME(ip_Forwarding).node.node,
680 &SYNC_NODE_NAME(ip_DefaultTTL).node.node,
681 &SYNC_NODE_NAME(ip_InReceives).node.node,
682 &SYNC_NODE_NAME(ip_InHdrErrors).node.node,
683 &SYNC_NODE_NAME(ip_InAddrErrors).node.node,
684 &SYNC_NODE_NAME(ip_ForwDatagrams).node.node,
685 &SYNC_NODE_NAME(ip_InUnknownProtos).node.node,
686 &SYNC_NODE_NAME(ip_InDiscards).node.node,
687 &SYNC_NODE_NAME(ip_InDelivers).node.node,
688 &SYNC_NODE_NAME(ip_OutRequests).node.node,
689 &SYNC_NODE_NAME(ip_OutDiscards).node.node,
690 &SYNC_NODE_NAME(ip_OutNoRoutes).node.node,
691 &SYNC_NODE_NAME(ip_ReasmTimeout).node.node,
692 &SYNC_NODE_NAME(ip_ReasmReqds).node.node,
693 &SYNC_NODE_NAME(ip_ReasmOKs).node.node,
694 &SYNC_NODE_NAME(ip_ReasmFails).node.node,
695 &SYNC_NODE_NAME(ip_FragOKs).node.node,
696 &SYNC_NODE_NAME(ip_FragFails).node.node,
697 &SYNC_NODE_NAME(ip_FragCreates).node.node,
698 &SYNC_NODE_NAME(ip_AddrTable).node.node,
699 &SYNC_NODE_NAME(ip_RouteTable).node.node,
700 #if LWIP_ARP
701 &SYNC_NODE_NAME(ip_NetToMediaTable).node.node,
702 #endif /* LWIP_ARP */
703 &SYNC_NODE_NAME(ip_RoutingDiscards).node.node
704 };
705  
706 const struct snmp_tree_node snmp_mib2_ip_root = SNMP_CREATE_TREE_NODE(4, ip_nodes);
707 #endif /* LWIP_IPV4 */
708  
709 /* --- at .1.3.6.1.2.1.3 ----------------------------------------------------- */
710  
711 #if LWIP_ARP && LWIP_IPV4
712 /* at node table is a subset of ip_nettomedia table (same rows but less columns) */
713 static const struct snmp_table_simple_col_def at_Table_columns[] = {
714 { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* atIfIndex */
715 { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_VARIANT_VALUE_TYPE_PTR }, /* atPhysAddress */
716 { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 } /* atNetAddress */
717 };
718  
719 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);
720  
721 /* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */
722 CREATE_LWIP_SYNC_NODE(1, at_Table)
723  
724 static const struct snmp_node *const at_nodes[] = {
725 &SYNC_NODE_NAME(at_Table).node.node
726 };
727  
728 const struct snmp_tree_node snmp_mib2_at_root = SNMP_CREATE_TREE_NODE(3, at_nodes);
729 #endif /* LWIP_ARP && LWIP_IPV4 */
730  
731 #endif /* LWIP_SNMP && SNMP_LWIP_MIB2 */