1 /*-
2 * Copyright (c) 2000 Whistle Communications, Inc.
3 * All rights reserved.
4 *
5 * Subject to the following obligations and disclaimer of warranty, use and
6 * redistribution of this software, in source or object code forms, with or
7 * without modifications are expressly permitted by Whistle Communications;
8 * provided, however, that:
9 * 1. Any and all reproductions of the source or object code must include the
10 * copyright notice above and the following disclaimer of warranties; and
11 * 2. No rights are granted, in any manner or form, to use Whistle
12 * Communications, Inc. trademarks, including the mark "WHISTLE
13 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
14 * such appears in the above copyright notice or in the software.
15 *
16 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
17 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
18 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
19 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
21 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
22 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
23 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
24 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
25 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
26 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
27 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
32 * OF SUCH DAMAGE.
33 *
34 * Author: Archie Cobbs <archie@freebsd.org>
35 *
36 * $FreeBSD$
37 */
38
39 /*
40 * ng_bridge(4) netgraph node type
41 *
42 * The node performs standard intelligent Ethernet bridging over
43 * each of its connected hooks, or links. A simple loop detection
44 * algorithm is included which disables a link for priv->conf.loopTimeout
45 * seconds when a host is seen to have jumped from one link to
46 * another within priv->conf.minStableAge seconds.
47 *
48 * We keep a hashtable that maps Ethernet addresses to host info,
49 * which is contained in struct ng_bridge_host's. These structures
50 * tell us on which link the host may be found. A host's entry will
51 * expire after priv->conf.maxStaleness seconds.
52 *
53 * This node is optimzed for stable networks, where machines jump
54 * from one port to the other only rarely.
55 */
56
57 #include <sys/param.h>
58 #include <sys/systm.h>
59 #include <sys/kernel.h>
60 #include <sys/lock.h>
61 #include <sys/malloc.h>
62 #include <sys/mbuf.h>
63 #include <sys/errno.h>
64 #include <sys/rwlock.h>
65 #include <sys/syslog.h>
66 #include <sys/socket.h>
67 #include <sys/ctype.h>
68 #include <sys/types.h>
69 #include <sys/counter.h>
70
71 #include <net/if.h>
72 #include <net/if_var.h>
73 #include <net/ethernet.h>
74 #include <net/vnet.h>
75
76 #include <netinet/in.h>
77 #if 0 /* not used yet */
78 #include <netinet/ip_fw.h>
79 #endif
80 #include <netgraph/ng_message.h>
81 #include <netgraph/netgraph.h>
82 #include <netgraph/ng_parse.h>
83 #include <netgraph/ng_bridge.h>
84
85 #ifdef NG_SEPARATE_MALLOC
86 static MALLOC_DEFINE(M_NETGRAPH_BRIDGE, "netgraph_bridge",
87 "netgraph bridge node");
88 #else
89 #define M_NETGRAPH_BRIDGE M_NETGRAPH
90 #endif
91
92 /* Counter based stats */
93 struct ng_bridge_link_kernel_stats {
94 counter_u64_t recvOctets; /* total octets rec'd on link */
95 counter_u64_t recvPackets; /* total pkts rec'd on link */
96 counter_u64_t recvMulticasts; /* multicast pkts rec'd on link */
97 counter_u64_t recvBroadcasts; /* broadcast pkts rec'd on link */
98 counter_u64_t recvUnknown; /* pkts rec'd with unknown dest addr */
99 counter_u64_t recvRunts; /* pkts rec'd less than 14 bytes */
100 counter_u64_t recvInvalid; /* pkts rec'd with bogus source addr */
101 counter_u64_t xmitOctets; /* total octets xmit'd on link */
102 counter_u64_t xmitPackets; /* total pkts xmit'd on link */
103 counter_u64_t xmitMulticasts; /* multicast pkts xmit'd on link */
104 counter_u64_t xmitBroadcasts; /* broadcast pkts xmit'd on link */
105 counter_u64_t loopDrops; /* pkts dropped due to loopback */
106 u_int64_t loopDetects; /* number of loop detections */
107 counter_u64_t memoryFailures; /* times couldn't get mem or mbuf */
108 };
109
110 /* Per-link private data */
111 struct ng_bridge_link {
112 hook_p hook; /* netgraph hook */
113 u_int16_t loopCount; /* loop ignore timer */
114 unsigned int learnMac : 1, /* autolearn macs */
115 sendUnknown : 1;/* send unknown macs out */
116 struct ng_bridge_link_kernel_stats stats; /* link stats */
117 };
118 typedef struct ng_bridge_link const *link_cp; /* read only access */
119
120 /* Per-node private data */
121 struct ng_bridge_private {
122 struct ng_bridge_bucket *tab; /* hash table bucket array */
123 struct ng_bridge_config conf; /* node configuration */
124 node_p node; /* netgraph node */
125 u_int numHosts; /* num entries in table */
126 u_int numBuckets; /* num buckets in table */
127 u_int hashMask; /* numBuckets - 1 */
128 int numLinks; /* num connected links */
129 unsigned int persistent : 1, /* can exist w/o hooks */
130 sendUnknown : 1;/* links receive unknowns by default */
131 struct callout timer; /* one second periodic timer */
132 };
133 typedef struct ng_bridge_private *priv_p;
134 typedef struct ng_bridge_private const *priv_cp; /* read only access */
135
136 /* Information about a host, stored in a hash table entry */
137 struct ng_bridge_host {
138 u_char addr[6]; /* ethernet address */
139 link_p link; /* link where addr can be found */
140 u_int16_t age; /* seconds ago entry was created */
141 u_int16_t staleness; /* seconds ago host last heard from */
142 SLIST_ENTRY(ng_bridge_host) next; /* next entry in bucket */
143 };
144
145 /* Hash table bucket declaration */
146 SLIST_HEAD(ng_bridge_bucket, ng_bridge_host);
147
148 /* Netgraph node methods */
149 static ng_constructor_t ng_bridge_constructor;
150 static ng_rcvmsg_t ng_bridge_rcvmsg;
151 static ng_shutdown_t ng_bridge_shutdown;
152 static ng_newhook_t ng_bridge_newhook;
153 static ng_rcvdata_t ng_bridge_rcvdata;
154 static ng_disconnect_t ng_bridge_disconnect;
155
156 /* Other internal functions */
157 static struct ng_bridge_host *ng_bridge_get(priv_cp priv, const u_char *addr);
158 static int ng_bridge_put(priv_p priv, const u_char *addr, link_p link);
159 static void ng_bridge_rehash(priv_p priv);
160 static void ng_bridge_remove_hosts(priv_p priv, link_p link);
161 static void ng_bridge_timeout(node_p node, hook_p hook, void *arg1, int arg2);
162 static const char *ng_bridge_nodename(node_cp node);
163
164 /* Ethernet broadcast */
165 static const u_char ng_bridge_bcast_addr[ETHER_ADDR_LEN] =
166 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
167
168 /* Compare Ethernet addresses using 32 and 16 bit words instead of bytewise */
169 #define ETHER_EQUAL(a,b) (((const u_int32_t *)(a))[0] \
170 == ((const u_int32_t *)(b))[0] \
171 && ((const u_int16_t *)(a))[2] \
172 == ((const u_int16_t *)(b))[2])
173
174 /* Minimum and maximum number of hash buckets. Must be a power of two. */
175 #define MIN_BUCKETS (1 << 5) /* 32 */
176 #define MAX_BUCKETS (1 << 14) /* 16384 */
177
178 /* Configuration default values */
179 #define DEFAULT_LOOP_TIMEOUT 60
180 #define DEFAULT_MAX_STALENESS (15 * 60) /* same as ARP timeout */
181 #define DEFAULT_MIN_STABLE_AGE 1
182
183 /******************************************************************
184 NETGRAPH PARSE TYPES
185 ******************************************************************/
186
187 /*
188 * How to determine the length of the table returned by NGM_BRIDGE_GET_TABLE
189 */
190 static int
191 ng_bridge_getTableLength(const struct ng_parse_type *type,
192 const u_char *start, const u_char *buf)
193 {
194 const struct ng_bridge_host_ary *const hary
195 = (const struct ng_bridge_host_ary *)(buf - sizeof(u_int32_t));
196
197 return hary->numHosts;
198 }
199
200 /* Parse type for struct ng_bridge_host_ary */
201 static const struct ng_parse_struct_field ng_bridge_host_type_fields[]
202 = NG_BRIDGE_HOST_TYPE_INFO(&ng_parse_enaddr_type);
203 static const struct ng_parse_type ng_bridge_host_type = {
204 &ng_parse_struct_type,
205 &ng_bridge_host_type_fields
206 };
207 static const struct ng_parse_array_info ng_bridge_hary_type_info = {
208 &ng_bridge_host_type,
209 ng_bridge_getTableLength
210 };
211 static const struct ng_parse_type ng_bridge_hary_type = {
212 &ng_parse_array_type,
213 &ng_bridge_hary_type_info
214 };
215 static const struct ng_parse_struct_field ng_bridge_host_ary_type_fields[]
216 = NG_BRIDGE_HOST_ARY_TYPE_INFO(&ng_bridge_hary_type);
217 static const struct ng_parse_type ng_bridge_host_ary_type = {
218 &ng_parse_struct_type,
219 &ng_bridge_host_ary_type_fields
220 };
221
222 /* Parse type for struct ng_bridge_config */
223 static const struct ng_parse_struct_field ng_bridge_config_type_fields[]
224 = NG_BRIDGE_CONFIG_TYPE_INFO;
225 static const struct ng_parse_type ng_bridge_config_type = {
226 &ng_parse_struct_type,
227 &ng_bridge_config_type_fields
228 };
229
230 /* Parse type for struct ng_bridge_link_stat */
231 static const struct ng_parse_struct_field ng_bridge_stats_type_fields[]
232 = NG_BRIDGE_STATS_TYPE_INFO;
233 static const struct ng_parse_type ng_bridge_stats_type = {
234 &ng_parse_struct_type,
235 &ng_bridge_stats_type_fields
236 };
237 /* Parse type for struct ng_bridge_move_host */
238 static const struct ng_parse_struct_field ng_bridge_move_host_type_fields[]
239 = NG_BRIDGE_MOVE_HOST_TYPE_INFO(&ng_parse_enaddr_type);
240 static const struct ng_parse_type ng_bridge_move_host_type = {
241 &ng_parse_struct_type,
242 &ng_bridge_move_host_type_fields
243 };
244
245 /* List of commands and how to convert arguments to/from ASCII */
246 static const struct ng_cmdlist ng_bridge_cmdlist[] = {
247 {
248 NGM_BRIDGE_COOKIE,
249 NGM_BRIDGE_SET_CONFIG,
250 "setconfig",
251 &ng_bridge_config_type,
252 NULL
253 },
254 {
255 NGM_BRIDGE_COOKIE,
256 NGM_BRIDGE_GET_CONFIG,
257 "getconfig",
258 NULL,
259 &ng_bridge_config_type
260 },
261 {
262 NGM_BRIDGE_COOKIE,
263 NGM_BRIDGE_RESET,
264 "reset",
265 NULL,
266 NULL
267 },
268 {
269 NGM_BRIDGE_COOKIE,
270 NGM_BRIDGE_GET_STATS,
271 "getstats",
272 &ng_parse_uint32_type,
273 &ng_bridge_stats_type
274 },
275 {
276 NGM_BRIDGE_COOKIE,
277 NGM_BRIDGE_CLR_STATS,
278 "clrstats",
279 &ng_parse_uint32_type,
280 NULL
281 },
282 {
283 NGM_BRIDGE_COOKIE,
284 NGM_BRIDGE_GETCLR_STATS,
285 "getclrstats",
286 &ng_parse_uint32_type,
287 &ng_bridge_stats_type
288 },
289 {
290 NGM_BRIDGE_COOKIE,
291 NGM_BRIDGE_GET_TABLE,
292 "gettable",
293 NULL,
294 &ng_bridge_host_ary_type
295 },
296 {
297 NGM_BRIDGE_COOKIE,
298 NGM_BRIDGE_SET_PERSISTENT,
299 "setpersistent",
300 NULL,
301 NULL
302 },
303 {
304 NGM_BRIDGE_COOKIE,
305 NGM_BRIDGE_MOVE_HOST,
306 "movehost",
307 &ng_bridge_move_host_type,
308 NULL
309 },
310 { 0 }
311 };
312
313 /* Node type descriptor */
314 static struct ng_type ng_bridge_typestruct = {
315 .version = NG_ABI_VERSION,
316 .name = NG_BRIDGE_NODE_TYPE,
317 .constructor = ng_bridge_constructor,
318 .rcvmsg = ng_bridge_rcvmsg,
319 .shutdown = ng_bridge_shutdown,
320 .newhook = ng_bridge_newhook,
321 .rcvdata = ng_bridge_rcvdata,
322 .disconnect = ng_bridge_disconnect,
323 .cmdlist = ng_bridge_cmdlist,
324 };
325 NETGRAPH_INIT(bridge, &ng_bridge_typestruct);
326
327 /******************************************************************
328 NETGRAPH NODE METHODS
329 ******************************************************************/
330
331 /*
332 * Node constructor
333 */
334 static int
335 ng_bridge_constructor(node_p node)
336 {
337 priv_p priv;
338
339 /* Allocate and initialize private info */
340 priv = malloc(sizeof(*priv), M_NETGRAPH_BRIDGE, M_WAITOK | M_ZERO);
341 ng_callout_init(&priv->timer);
342
343 /* Allocate and initialize hash table, etc. */
344 priv->tab = malloc(MIN_BUCKETS * sizeof(*priv->tab),
345 M_NETGRAPH_BRIDGE, M_WAITOK | M_ZERO);
346 priv->numBuckets = MIN_BUCKETS;
347 priv->hashMask = MIN_BUCKETS - 1;
348 priv->conf.debugLevel = 1;
349 priv->conf.loopTimeout = DEFAULT_LOOP_TIMEOUT;
350 priv->conf.maxStaleness = DEFAULT_MAX_STALENESS;
351 priv->conf.minStableAge = DEFAULT_MIN_STABLE_AGE;
352 priv->sendUnknown = 1; /* classic bridge */
353
354 NG_NODE_SET_PRIVATE(node, priv);
355 priv->node = node;
356
357 /* Start timer; timer is always running while node is alive */
358 ng_callout(&priv->timer, node, NULL, hz, ng_bridge_timeout, NULL, 0);
359
360 /* Done */
361 return (0);
362 }
363
364 /*
365 * Method for attaching a new hook
366 */
367 static int
368 ng_bridge_newhook(node_p node, hook_p hook, const char *name)
369 {
370 const priv_p priv = NG_NODE_PRIVATE(node);
371 char linkName[NG_HOOKSIZ];
372 u_int32_t linkNum;
373 link_p link;
374 const char *prefix = NG_BRIDGE_HOOK_LINK_PREFIX;
375 bool isUplink;
376
377 /* Check for a link hook */
378 if (strlen(name) <= strlen(prefix))
379 return (EINVAL); /* Unknown hook name */
380
381 isUplink = (name[0] == 'u');
382 if (isUplink)
383 prefix = NG_BRIDGE_HOOK_UPLINK_PREFIX;
384
385 /* primitive parsing */
386 linkNum = strtoul(name + strlen(prefix), NULL, 10);
387 /* validation by comparing against the reconstucted name */
388 snprintf(linkName, sizeof(linkName), "%s%u", prefix, linkNum);
389 if (strcmp(linkName, name) != 0)
390 return (EINVAL);
391
392 if (linkNum == 0 && isUplink)
393 return (EINVAL);
394
395 if(NG_PEER_NODE(hook) == node)
396 return (ELOOP);
397
398 link = malloc(sizeof(*link), M_NETGRAPH_BRIDGE, M_WAITOK | M_ZERO);
399
400 link->stats.recvOctets = counter_u64_alloc(M_WAITOK);
401 link->stats.recvPackets = counter_u64_alloc(M_WAITOK);
402 link->stats.recvMulticasts = counter_u64_alloc(M_WAITOK);
403 link->stats.recvBroadcasts = counter_u64_alloc(M_WAITOK);
404 link->stats.recvUnknown = counter_u64_alloc(M_WAITOK);
405 link->stats.recvRunts = counter_u64_alloc(M_WAITOK);
406 link->stats.recvInvalid = counter_u64_alloc(M_WAITOK);
407 link->stats.xmitOctets = counter_u64_alloc(M_WAITOK);
408 link->stats.xmitPackets = counter_u64_alloc(M_WAITOK);
409 link->stats.xmitMulticasts = counter_u64_alloc(M_WAITOK);
410 link->stats.xmitBroadcasts = counter_u64_alloc(M_WAITOK);
411 link->stats.loopDrops = counter_u64_alloc(M_WAITOK);
412 link->stats.memoryFailures = counter_u64_alloc(M_WAITOK);
413
414 link->hook = hook;
415 if (isUplink) {
416 link->learnMac = 0;
417 link->sendUnknown = 1;
418 if (priv->numLinks == 0) /* if the first link is an uplink */
419 priv->sendUnknown = 0; /* switch to restrictive mode */
420 } else {
421 link->learnMac = 1;
422 link->sendUnknown = priv->sendUnknown;
423 }
424
425 NG_HOOK_SET_PRIVATE(hook, link);
426 priv->numLinks++;
427 return (0);
428 }
429
430 /*
431 * Receive a control message
432 */
433 static void ng_bridge_clear_link_stats(struct ng_bridge_link_kernel_stats * p)
434 {
435 counter_u64_zero(p->recvOctets);
436 counter_u64_zero(p->recvPackets);
437 counter_u64_zero(p->recvMulticasts);
438 counter_u64_zero(p->recvBroadcasts);
439 counter_u64_zero(p->recvUnknown);
440 counter_u64_zero(p->recvRunts);
441 counter_u64_zero(p->recvInvalid);
442 counter_u64_zero(p->xmitOctets);
443 counter_u64_zero(p->xmitPackets);
444 counter_u64_zero(p->xmitMulticasts);
445 counter_u64_zero(p->xmitBroadcasts);
446 counter_u64_zero(p->loopDrops);
447 p->loopDetects = 0;
448 counter_u64_zero(p->memoryFailures);
449 };
450
451 static int
452 ng_bridge_reset_link(hook_p hook, void *arg __unused)
453 {
454 link_p priv = NG_HOOK_PRIVATE(hook);
455
456 priv->loopCount = 0;
457 ng_bridge_clear_link_stats(&priv->stats);
458 return (1);
459 }
460
461
462 static int
463 ng_bridge_rcvmsg(node_p node, item_p item, hook_p lasthook)
464 {
465 const priv_p priv = NG_NODE_PRIVATE(node);
466 struct ng_mesg *resp = NULL;
467 int error = 0;
468 struct ng_mesg *msg;
469
470 NGI_GET_MSG(item, msg);
471 switch (msg->header.typecookie) {
472 #ifdef NGM_BRIDGE_TABLE_ABI
473 case NGM_BRIDGE_COOKIE_TBL:
474 switch (msg->header.cmd) {
475 case NGM_BRIDGE_GET_CONFIG:
476 {
477 struct ng_bridge_config_tbl *conf;
478
479 NG_MKRESPONSE(resp, msg, sizeof(*conf),
480 M_NOWAIT|M_ZERO);
481 if (resp == NULL) {
482 error = ENOMEM;
483 break;
484 }
485 conf = (struct ng_bridge_config_tbl *)resp->data;
486 conf->cfg = priv->conf;
487 break;
488 }
489 case NGM_BRIDGE_SET_CONFIG:
490 {
491 struct ng_bridge_config_tbl *conf;
492
493 if (msg->header.arglen != sizeof(*conf)) {
494 error = EINVAL;
495 break;
496 }
497 conf = (struct ng_bridge_config_tbl *)msg->data;
498 priv->conf = conf->cfg;
499 break;
500 }
501 case NGM_BRIDGE_GET_TABLE:
502 {
503 struct ng_bridge_host_tbl_ary *ary;
504 struct ng_bridge_host *host;
505 int i, bucket;
506
507 NG_MKRESPONSE(resp, msg, sizeof(*ary) +
508 (priv->numHosts * sizeof(*ary->hosts)), M_NOWAIT);
509 if (resp == NULL) {
510 error = ENOMEM;
511 break;
512 }
513 ary = (struct ng_bridge_host_tbl_ary *)resp->data;
514 ary->numHosts = priv->numHosts;
515 i = 0;
516 for (bucket = 0; bucket < priv->numBuckets; bucket++) {
517 SLIST_FOREACH(host, &priv->tab[bucket], next) {
518 const char *name = NG_HOOK_NAME(host->link->hook);
519 const char *prefix = name[0] == 'u' ?
520 NG_BRIDGE_HOOK_UPLINK_PREFIX :
521 NG_BRIDGE_HOOK_LINK_PREFIX;
522
523 memcpy(ary->hosts[i].addr, host->addr,
524 sizeof(ary->hosts[i].addr));
525 ary->hosts[i].age = host->age;
526 ary->hosts[i].staleness = host->staleness;
527 ary->hosts[i].linkNum = strtol(
528 name + strlen(prefix), NULL, 10);
529 i++;
530 }
531 }
532 break;
533 }
534 }
535 /* If already handled break, otherwise use new ABI. */
536 if (resp != NULL || error != 0)
537 break;
538 #endif /* NGM_BRIDGE_TABLE_ABI */
539 case NGM_BRIDGE_COOKIE:
540 switch (msg->header.cmd) {
541 case NGM_BRIDGE_GET_CONFIG:
542 {
543 struct ng_bridge_config *conf;
544
545 NG_MKRESPONSE(resp, msg,
546 sizeof(struct ng_bridge_config), M_NOWAIT);
547 if (resp == NULL) {
548 error = ENOMEM;
549 break;
550 }
551 conf = (struct ng_bridge_config *)resp->data;
552 *conf = priv->conf; /* no sanity checking needed */
553 break;
554 }
555 case NGM_BRIDGE_SET_CONFIG:
556 {
557 struct ng_bridge_config *conf;
558
559 if (msg->header.arglen
560 != sizeof(struct ng_bridge_config)) {
561 error = EINVAL;
562 break;
563 }
564 conf = (struct ng_bridge_config *)msg->data;
565 priv->conf = *conf;
566 break;
567 }
568 case NGM_BRIDGE_RESET:
569 {
570 hook_p rethook;
571
572 /* Flush all entries in the hash table */
573 ng_bridge_remove_hosts(priv, NULL);
574
575 /* Reset all loop detection counters and stats */
576 NG_NODE_FOREACH_HOOK(node, ng_bridge_reset_link, NULL,
577 rethook);
578 break;
579 }
580 case NGM_BRIDGE_GET_STATS:
581 case NGM_BRIDGE_CLR_STATS:
582 case NGM_BRIDGE_GETCLR_STATS:
583 {
584 hook_p hook;
585 link_p link;
586 char linkName[NG_HOOKSIZ];
587 int linkNum;
588
589 /* Get link number */
590 if (msg->header.arglen != sizeof(u_int32_t)) {
591 error = EINVAL;
592 break;
593 }
594 linkNum = *((int32_t *)msg->data);
595 if (linkNum < 0)
596 snprintf(linkName, sizeof(linkName),
597 "%s%u", NG_BRIDGE_HOOK_UPLINK_PREFIX, -linkNum);
598 else
599 snprintf(linkName, sizeof(linkName),
600 "%s%u", NG_BRIDGE_HOOK_LINK_PREFIX, linkNum);
601
602 if ((hook = ng_findhook(node, linkName)) == NULL) {
603 error = ENOTCONN;
604 break;
605 }
606 link = NG_HOOK_PRIVATE(hook);
607
608 /* Get/clear stats */
609 if (msg->header.cmd != NGM_BRIDGE_CLR_STATS) {
610 struct ng_bridge_link_stats *rs;
611
612 NG_MKRESPONSE(resp, msg,
613 sizeof(link->stats), M_NOWAIT);
614 if (resp == NULL) {
615 error = ENOMEM;
616 break;
617 }
618 rs = (struct ng_bridge_link_stats *)resp->data;
619 #define FETCH(x) rs->x = counter_u64_fetch(link->stats.x)
620 FETCH(recvOctets);
621 FETCH(recvPackets);
622 FETCH(recvMulticasts);
623 FETCH(recvBroadcasts);
624 FETCH(recvUnknown);
625 FETCH(recvRunts);
626 FETCH(recvInvalid);
627 FETCH(xmitOctets);
628 FETCH(xmitPackets);
629 FETCH(xmitMulticasts);
630 FETCH(xmitBroadcasts);
631 FETCH(loopDrops);
632 rs->loopDetects = link->stats.loopDetects;
633 FETCH(memoryFailures);
634 #undef FETCH
635 }
636 if (msg->header.cmd != NGM_BRIDGE_GET_STATS)
637 ng_bridge_clear_link_stats(&link->stats);
638 break;
639 }
640 case NGM_BRIDGE_GET_TABLE:
641 {
642 struct ng_bridge_host_ary *ary;
643 struct ng_bridge_host *host;
644 int i = 0, bucket;
645
646 NG_MKRESPONSE(resp, msg, sizeof(*ary)
647 + (priv->numHosts * sizeof(*ary->hosts)), M_NOWAIT);
648 if (resp == NULL) {
649 error = ENOMEM;
650 break;
651 }
652 ary = (struct ng_bridge_host_ary *)resp->data;
653 ary->numHosts = priv->numHosts;
654 for (bucket = 0; bucket < priv->numBuckets; bucket++) {
655 SLIST_FOREACH(host, &priv->tab[bucket], next) {
656 memcpy(ary->hosts[i].addr,
657 host->addr,
658 sizeof(ary->hosts[i].addr));
659 ary->hosts[i].age = host->age;
660 ary->hosts[i].staleness = host->staleness;
661 strncpy(ary->hosts[i].hook,
662 NG_HOOK_NAME(host->link->hook),
663 sizeof(ary->hosts[i].hook));
664 i++;
665 }
666 }
667 break;
668 }
669 case NGM_BRIDGE_SET_PERSISTENT:
670 {
671 priv->persistent = 1;
672 break;
673 }
674 case NGM_BRIDGE_MOVE_HOST:
675 {
676 struct ng_bridge_move_host *mh;
677 hook_p hook;
678
679 if (msg->header.arglen < sizeof(*mh)) {
680 error = EINVAL;
681 break;
682 }
683 mh = (struct ng_bridge_move_host *)msg->data;
684 hook = (mh->hook[0] == 0)
685 ? lasthook
686 : ng_findhook(node, mh->hook);
687 if (hook == NULL) {
688 error = ENOENT;
689 break;
690 }
691 error = ng_bridge_put(priv, mh->addr, NG_HOOK_PRIVATE(hook));
692 break;
693 }
694 default:
695 error = EINVAL;
696 break;
697 }
698 break;
699 default:
700 error = EINVAL;
701 break;
702 }
703
704 /* Done */
705 NG_RESPOND_MSG(error, node, item, resp);
706 NG_FREE_MSG(msg);
707 return (error);
708 }
709
710 /*
711 * Receive data on a hook
712 */
713 struct ng_bridge_send_ctx {
714 link_p foundFirst, incoming;
715 struct mbuf * m;
716 int manycast, error;
717 };
718
719 /*
720 * Update stats and send out
721 */
722 static inline int
723 ng_bridge_send_data(link_cp dst, int manycast, struct mbuf *m, item_p item) {
724 int error = 0;
725 size_t len = m->m_pkthdr.len;
726
727 if(item != NULL)
728 NG_FWD_NEW_DATA(error, item, dst->hook, m);
729 else
730 NG_SEND_DATA_ONLY(error, dst->hook, m);
731
732 if (error) {
733 /* The packet is still ours */
734 if (item != NULL)
735 NG_FREE_ITEM(item);
736 if (m != NULL)
737 NG_FREE_M(m);
738 return (error);
739 }
740
741 counter_u64_add(dst->stats.xmitPackets, 1);
742 counter_u64_add(dst->stats.xmitOctets, len);
743 switch (manycast) {
744 default: /* unknown unicast */
745 break;
746 case 1: /* multicast */
747 counter_u64_add(dst->stats.xmitMulticasts, 1);
748 break;
749 case 2: /* broadcast */
750 counter_u64_add(dst->stats.xmitBroadcasts, 1);
751 break;
752 }
753 return (0);
754 }
755
756 /*
757 * Loop body for sending to multiple destinations
758 * return 0 to stop looping
759 */
760 static int
761 ng_bridge_send_ctx(hook_p dst, void *arg)
762 {
763 struct ng_bridge_send_ctx *ctx = arg;
764 link_p destLink = NG_HOOK_PRIVATE(dst);
765 struct mbuf *m2 = NULL;
766 int error = 0;
767
768 /* Skip incoming link */
769 if (destLink == ctx->incoming) {
770 return (1);
771 }
772
773 /* Skip sending unknowns to undesired links */
774 if (!ctx->manycast && !destLink->sendUnknown)
775 return (1);
776
777 if (ctx->foundFirst == NULL) {
778 /*
779 * This is the first usable link we have found.
780 * Reserve it for the originals.
781 * If we never find another we save a copy.
782 */
783 ctx->foundFirst = destLink;
784 return (1);
785 }
786
787 /*
788 * It's usable link but not the reserved (first) one.
789 * Copy mbuf info for sending.
790 */
791 m2 = m_dup(ctx->m, M_NOWAIT);
792 if (m2 == NULL) {
793 counter_u64_add(ctx->incoming->stats.memoryFailures, 1);
794 ctx->error = ENOBUFS;
795 return (0); /* abort loop, do not try again and again */
796 }
797
798 /* Send packet */
799 error = ng_bridge_send_data(destLink, ctx->manycast, m2, NULL);
800 if (error)
801 ctx->error = error;
802 return (1);
803 }
804
805 static int
806 ng_bridge_rcvdata(hook_p hook, item_p item)
807 {
808 const node_p node = NG_HOOK_NODE(hook);
809 const priv_p priv = NG_NODE_PRIVATE(node);
810 struct ng_bridge_host *host;
811 struct ether_header *eh;
812 struct ng_bridge_send_ctx ctx = { 0 };
813 hook_p ret;
814
815 NGI_GET_M(item, ctx.m);
816
817 ctx.incoming = NG_HOOK_PRIVATE(hook);
818 /* Sanity check packet and pull up header */
819 if (ctx.m->m_pkthdr.len < ETHER_HDR_LEN) {
820 counter_u64_add(ctx.incoming->stats.recvRunts, 1);
821 NG_FREE_ITEM(item);
822 NG_FREE_M(ctx.m);
823 return (EINVAL);
824 }
825 if (ctx.m->m_len < ETHER_HDR_LEN && !(ctx.m = m_pullup(ctx.m, ETHER_HDR_LEN))) {
826 counter_u64_add(ctx.incoming->stats.memoryFailures, 1);
827 NG_FREE_ITEM(item);
828 return (ENOBUFS);
829 }
830 eh = mtod(ctx.m, struct ether_header *);
831 if ((eh->ether_shost[0] & 1) != 0) {
832 counter_u64_add(ctx.incoming->stats.recvInvalid, 1);
833 NG_FREE_ITEM(item);
834 NG_FREE_M(ctx.m);
835 return (EINVAL);
836 }
837
838 /* Is link disabled due to a loopback condition? */
839 if (ctx.incoming->loopCount != 0) {
840 counter_u64_add(ctx.incoming->stats.loopDrops, 1);
841 NG_FREE_ITEM(item);
842 NG_FREE_M(ctx.m);
843 return (ELOOP);
844 }
845
846 /* Update stats */
847 counter_u64_add(ctx.incoming->stats.recvPackets, 1);
848 counter_u64_add(ctx.incoming->stats.recvOctets, ctx.m->m_pkthdr.len);
849 if ((ctx.manycast = (eh->ether_dhost[0] & 1)) != 0) {
850 if (ETHER_EQUAL(eh->ether_dhost, ng_bridge_bcast_addr)) {
851 counter_u64_add(ctx.incoming->stats.recvBroadcasts, 1);
852 ctx.manycast = 2;
853 } else
854 counter_u64_add(ctx.incoming->stats.recvMulticasts, 1);
855 }
856
857 /* Look up packet's source Ethernet address in hashtable */
858 if ((host = ng_bridge_get(priv, eh->ether_shost)) != NULL)
859 /* Update time since last heard from this host.
860 * This is safe without locking, because it's
861 * the only operation during shared access.
862 */
863 if (__predict_false(host->staleness > 0))
864 host->staleness = 0;
865
866 if ((host == NULL && ctx.incoming->learnMac) ||
867 (host != NULL && host->link != ctx.incoming)) {
868 struct ng_mesg *msg;
869 struct ng_bridge_move_host *mh;
870 int error = 0;
871
872 NG_MKMESSAGE(msg, NGM_BRIDGE_COOKIE, NGM_BRIDGE_MOVE_HOST,
873 sizeof(*mh), M_NOWAIT);
874 if (msg == NULL) {
875 counter_u64_add(ctx.incoming->stats.memoryFailures, 1);
876 NG_FREE_ITEM(item);
877 NG_FREE_M(ctx.m);
878 return (ENOMEM);
879 }
880 mh = (struct ng_bridge_move_host *)msg->data;
881 strncpy(mh->hook, NG_HOOK_NAME(ctx.incoming->hook),
882 sizeof(mh->hook));
883 memcpy(mh->addr, eh->ether_shost, sizeof(mh->addr));
884 NG_SEND_MSG_ID(error, node, msg, NG_NODE_ID(node),
885 NG_NODE_ID(node));
886 if (error)
887 counter_u64_add(ctx.incoming->stats.memoryFailures, 1);
888 }
889
890 if (host != NULL && host->link != ctx.incoming) {
891 if (host->age < priv->conf.minStableAge) {
892 /* Drop packet on instable links */
893 counter_u64_add(ctx.incoming->stats.loopDrops, 1);
894 NG_FREE_ITEM(item);
895 NG_FREE_M(ctx.m);
896 return (ELOOP);
897 }
898 }
899
900 /* Run packet through ipfw processing, if enabled */
901 #if 0
902 if (priv->conf.ipfw[linkNum] && V_fw_enable && V_ip_fw_chk_ptr != NULL) {
903 /* XXX not implemented yet */
904 }
905 #endif
906
907 /*
908 * If unicast and destination host known, deliver to host's link,
909 * unless it is the same link as the packet came in on.
910 */
911 if (!ctx.manycast) {
912
913 /* Determine packet destination link */
914 if ((host = ng_bridge_get(priv, eh->ether_dhost)) != NULL) {
915 link_p destLink = host->link;
916
917 /* If destination same as incoming link, do nothing */
918 if (destLink == ctx.incoming) {
919 NG_FREE_ITEM(item);
920 NG_FREE_M(ctx.m);
921 return (0);
922 }
923
924 /* Deliver packet out the destination link */
925 return (ng_bridge_send_data(destLink, ctx.manycast, ctx.m, item));
926 }
927
928 /* Destination host is not known */
929 counter_u64_add(ctx.incoming->stats.recvUnknown, 1);
930 }
931
932 /* Distribute unknown, multicast, broadcast pkts to all other links */
933 NG_NODE_FOREACH_HOOK(node, ng_bridge_send_ctx, &ctx, ret);
934
935 /* Finally send out on the first link found */
936 if (ctx.foundFirst != NULL) {
937 int error = ng_bridge_send_data(ctx.foundFirst, ctx.manycast, ctx.m, item);
938 if (error)
939 ctx.error = error;
940 } else { /* nothing to send at all */
941 NG_FREE_ITEM(item);
942 NG_FREE_M(ctx.m);
943 }
944
945 return (ctx.error);
946 }
947
948 /*
949 * Shutdown node
950 */
951 static int
952 ng_bridge_shutdown(node_p node)
953 {
954 const priv_p priv = NG_NODE_PRIVATE(node);
955
956 /*
957 * Shut down everything including the timer. Even if the
958 * callout has already been dequeued and is about to be
959 * run, ng_bridge_timeout() won't be fired as the node
960 * is already marked NGF_INVALID, so we're safe to free
961 * the node now.
962 */
963 KASSERT(priv->numLinks == 0 && priv->numHosts == 0,
964 ("%s: numLinks=%d numHosts=%d",
965 __func__, priv->numLinks, priv->numHosts));
966 ng_uncallout(&priv->timer, node);
967 NG_NODE_SET_PRIVATE(node, NULL);
968 NG_NODE_UNREF(node);
969 free(priv->tab, M_NETGRAPH_BRIDGE);
970 free(priv, M_NETGRAPH_BRIDGE);
971 return (0);
972 }
973
974 /*
975 * Hook disconnection.
976 */
977 static int
978 ng_bridge_disconnect(hook_p hook)
979 {
980 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
981 link_p link = NG_HOOK_PRIVATE(hook);
982
983 /* Remove all hosts associated with this link */
984 ng_bridge_remove_hosts(priv, link);
985
986 /* Free associated link information */
987 counter_u64_free(link->stats.recvOctets);
988 counter_u64_free(link->stats.recvPackets);
989 counter_u64_free(link->stats.recvMulticasts);
990 counter_u64_free(link->stats.recvBroadcasts);
991 counter_u64_free(link->stats.recvUnknown);
992 counter_u64_free(link->stats.recvRunts);
993 counter_u64_free(link->stats.recvInvalid);
994 counter_u64_free(link->stats.xmitOctets);
995 counter_u64_free(link->stats.xmitPackets);
996 counter_u64_free(link->stats.xmitMulticasts);
997 counter_u64_free(link->stats.xmitBroadcasts);
998 counter_u64_free(link->stats.loopDrops);
999 counter_u64_free(link->stats.memoryFailures);
1000 free(link, M_NETGRAPH_BRIDGE);
1001 priv->numLinks--;
1002
1003 /* If no more hooks, go away */
1004 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
1005 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))
1006 && !priv->persistent) {
1007 ng_rmnode_self(NG_HOOK_NODE(hook));
1008 }
1009 return (0);
1010 }
1011
1012 /******************************************************************
1013 HASH TABLE FUNCTIONS
1014 ******************************************************************/
1015
1016 /*
1017 * Hash algorithm
1018 */
1019 #define HASH(addr,mask) ( (((const u_int16_t *)(addr))[0] \
1020 ^ ((const u_int16_t *)(addr))[1] \
1021 ^ ((const u_int16_t *)(addr))[2]) & (mask) )
1022
1023 /*
1024 * Find a host entry in the table.
1025 */
1026 static struct ng_bridge_host *
1027 ng_bridge_get(priv_cp priv, const u_char *addr)
1028 {
1029 const int bucket = HASH(addr, priv->hashMask);
1030 struct ng_bridge_host *host;
1031
1032 SLIST_FOREACH(host, &priv->tab[bucket], next) {
1033 if (ETHER_EQUAL(host->addr, addr))
1034 return (host);
1035 }
1036 return (NULL);
1037 }
1038
1039 /*
1040 * Add a host entry to the table. If it already exists, move it
1041 * to the new link. Returns 0 on success.
1042 */
1043 static int
1044 ng_bridge_put(priv_p priv, const u_char *addr, link_p link)
1045 {
1046 const int bucket = HASH(addr, priv->hashMask);
1047 struct ng_bridge_host *host;
1048
1049 if ((host = ng_bridge_get(priv, addr)) != NULL) {
1050 /* Host already on the correct link? */
1051 if (host->link == link)
1052 return 0;
1053
1054 /* Move old host over to new link */
1055 if (host->age >= priv->conf.minStableAge) {
1056 host->link = link;
1057 host->age = 0;
1058 return (0);
1059 }
1060 /*
1061 * If the host was recently moved to the old link and
1062 * it's now jumping to a new link, declare a loopback
1063 * condition.
1064 */
1065 if (priv->conf.debugLevel >= 2)
1066 log(LOG_WARNING, "ng_bridge: %s:"
1067 " loopback detected on %s\n",
1068 ng_bridge_nodename(priv->node),
1069 NG_HOOK_NAME(link->hook));
1070
1071 /* Mark link as linka non grata */
1072 link->loopCount = priv->conf.loopTimeout;
1073 link->stats.loopDetects++;
1074
1075 /* Forget all hosts on this link */
1076 ng_bridge_remove_hosts(priv, link);
1077 return (ELOOP);
1078 }
1079
1080 /* Allocate and initialize new hashtable entry */
1081 host = malloc(sizeof(*host), M_NETGRAPH_BRIDGE, M_NOWAIT);
1082 if (host == NULL)
1083 return (ENOMEM);
1084 bcopy(addr, host->addr, ETHER_ADDR_LEN);
1085 host->link = link;
1086 host->staleness = 0;
1087 host->age = 0;
1088
1089 /* Add new element to hash bucket */
1090 SLIST_INSERT_HEAD(&priv->tab[bucket], host, next);
1091 priv->numHosts++;
1092
1093 /* Resize table if necessary */
1094 ng_bridge_rehash(priv);
1095 return (0);
1096 }
1097
1098 /*
1099 * Resize the hash table. We try to maintain the number of buckets
1100 * such that the load factor is in the range 0.25 to 1.0.
1101 *
1102 * If we can't get the new memory then we silently fail. This is OK
1103 * because things will still work and we'll try again soon anyway.
1104 */
1105 static void
1106 ng_bridge_rehash(priv_p priv)
1107 {
1108 struct ng_bridge_bucket *newTab;
1109 int oldBucket, newBucket;
1110 int newNumBuckets;
1111 u_int newMask;
1112
1113 /* Is table too full or too empty? */
1114 if (priv->numHosts > priv->numBuckets
1115 && (priv->numBuckets << 1) <= MAX_BUCKETS)
1116 newNumBuckets = priv->numBuckets << 1;
1117 else if (priv->numHosts < (priv->numBuckets >> 2)
1118 && (priv->numBuckets >> 2) >= MIN_BUCKETS)
1119 newNumBuckets = priv->numBuckets >> 2;
1120 else
1121 return;
1122 newMask = newNumBuckets - 1;
1123
1124 /* Allocate and initialize new table */
1125 newTab = malloc(newNumBuckets * sizeof(*newTab),
1126 M_NETGRAPH_BRIDGE, M_NOWAIT | M_ZERO);
1127 if (newTab == NULL)
1128 return;
1129
1130 /* Move all entries from old table to new table */
1131 for (oldBucket = 0; oldBucket < priv->numBuckets; oldBucket++) {
1132 struct ng_bridge_bucket *const oldList = &priv->tab[oldBucket];
1133
1134 while (!SLIST_EMPTY(oldList)) {
1135 struct ng_bridge_host *const host
1136 = SLIST_FIRST(oldList);
1137
1138 SLIST_REMOVE_HEAD(oldList, next);
1139 newBucket = HASH(host->addr, newMask);
1140 SLIST_INSERT_HEAD(&newTab[newBucket], host, next);
1141 }
1142 }
1143
1144 /* Replace old table with new one */
1145 if (priv->conf.debugLevel >= 3) {
1146 log(LOG_INFO, "ng_bridge: %s: table size %d -> %d\n",
1147 ng_bridge_nodename(priv->node),
1148 priv->numBuckets, newNumBuckets);
1149 }
1150 free(priv->tab, M_NETGRAPH_BRIDGE);
1151 priv->numBuckets = newNumBuckets;
1152 priv->hashMask = newMask;
1153 priv->tab = newTab;
1154 return;
1155 }
1156
1157 /******************************************************************
1158 MISC FUNCTIONS
1159 ******************************************************************/
1160
1161
1162 /*
1163 * Remove all hosts associated with a specific link from the hashtable.
1164 * If linkNum == -1, then remove all hosts in the table.
1165 */
1166 static void
1167 ng_bridge_remove_hosts(priv_p priv, link_p link)
1168 {
1169 int bucket;
1170
1171 for (bucket = 0; bucket < priv->numBuckets; bucket++) {
1172 struct ng_bridge_host **hptr = &SLIST_FIRST(&priv->tab[bucket]);
1173
1174 while (*hptr != NULL) {
1175 struct ng_bridge_host *const host = *hptr;
1176
1177 if (link == NULL || host->link == link) {
1178 *hptr = SLIST_NEXT(host, next);
1179 free(host, M_NETGRAPH_BRIDGE);
1180 priv->numHosts--;
1181 } else
1182 hptr = &SLIST_NEXT(host, next);
1183 }
1184 }
1185 }
1186
1187 /*
1188 * Handle our once-per-second timeout event. We do two things:
1189 * we decrement link->loopCount for those links being muted due to
1190 * a detected loopback condition, and we remove any hosts from
1191 * the hashtable whom we haven't heard from in a long while.
1192 */
1193 static int
1194 ng_bridge_unmute(hook_p hook, void *arg)
1195 {
1196 link_p link = NG_HOOK_PRIVATE(hook);
1197 node_p node = NG_HOOK_NODE(hook);
1198 priv_p priv = NG_NODE_PRIVATE(node);
1199 int *counter = arg;
1200
1201 if (link->loopCount != 0) {
1202 link->loopCount--;
1203 if (link->loopCount == 0 && priv->conf.debugLevel >= 2) {
1204 log(LOG_INFO, "ng_bridge: %s:"
1205 " restoring looped back %s\n",
1206 ng_bridge_nodename(node), NG_HOOK_NAME(hook));
1207 }
1208 }
1209 (*counter)++;
1210 return (1);
1211 }
1212
1213 static void
1214 ng_bridge_timeout(node_p node, hook_p hook, void *arg1, int arg2)
1215 {
1216 const priv_p priv = NG_NODE_PRIVATE(node);
1217 int bucket;
1218 int counter = 0;
1219 hook_p ret;
1220
1221 /* Update host time counters and remove stale entries */
1222 for (bucket = 0; bucket < priv->numBuckets; bucket++) {
1223 struct ng_bridge_host **hptr = &SLIST_FIRST(&priv->tab[bucket]);
1224
1225 while (*hptr != NULL) {
1226 struct ng_bridge_host *const host = *hptr;
1227
1228 /* Remove hosts we haven't heard from in a while */
1229 if (++host->staleness >= priv->conf.maxStaleness) {
1230 *hptr = SLIST_NEXT(host, next);
1231 free(host, M_NETGRAPH_BRIDGE);
1232 priv->numHosts--;
1233 } else {
1234 if (host->age < 0xffff)
1235 host->age++;
1236 hptr = &SLIST_NEXT(host, next);
1237 counter++;
1238 }
1239 }
1240 }
1241 KASSERT(priv->numHosts == counter,
1242 ("%s: hosts: %d != %d", __func__, priv->numHosts, counter));
1243
1244 /* Decrease table size if necessary */
1245 ng_bridge_rehash(priv);
1246
1247 /* Decrease loop counter on muted looped back links */
1248 counter = 0;
1249 NG_NODE_FOREACH_HOOK(node, ng_bridge_unmute, &counter, ret);
1250 KASSERT(priv->numLinks == counter,
1251 ("%s: links: %d != %d", __func__, priv->numLinks, counter));
1252
1253 /* Register a new timeout, keeping the existing node reference */
1254 ng_callout(&priv->timer, node, NULL, hz, ng_bridge_timeout, NULL, 0);
1255 }
1256
1257 /*
1258 * Return node's "name", even if it doesn't have one.
1259 */
1260 static const char *
1261 ng_bridge_nodename(node_cp node)
1262 {
1263 static char name[NG_NODESIZ];
1264
1265 if (NG_NODE_HAS_NAME(node))
1266 snprintf(name, sizeof(name), "%s", NG_NODE_NAME(node));
1267 else
1268 snprintf(name, sizeof(name), "[%x]", ng_node2ID(node));
1269 return name;
1270 }
1271
Cache object: cb65b877678ac413a8d3e62679c57837
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