1
2 /*
3 * ng_ether.c
4 */
5
6 /*-
7 * Copyright (c) 1996-2000 Whistle Communications, Inc.
8 * All rights reserved.
9 *
10 * Subject to the following obligations and disclaimer of warranty, use and
11 * redistribution of this software, in source or object code forms, with or
12 * without modifications are expressly permitted by Whistle Communications;
13 * provided, however, that:
14 * 1. Any and all reproductions of the source or object code must include the
15 * copyright notice above and the following disclaimer of warranties; and
16 * 2. No rights are granted, in any manner or form, to use Whistle
17 * Communications, Inc. trademarks, including the mark "WHISTLE
18 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
19 * such appears in the above copyright notice or in the software.
20 *
21 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
22 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
23 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
24 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
26 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
27 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
28 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
29 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
30 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
31 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
32 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
33 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
36 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
37 * OF SUCH DAMAGE.
38 *
39 * Authors: Archie Cobbs <archie@freebsd.org>
40 * Julian Elischer <julian@freebsd.org>
41 *
42 * $FreeBSD$
43 */
44
45 /*
46 * ng_ether(4) netgraph node type
47 */
48
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/kernel.h>
52 #include <sys/malloc.h>
53 #include <sys/mbuf.h>
54 #include <sys/errno.h>
55 #include <sys/syslog.h>
56 #include <sys/socket.h>
57
58 #include <net/if.h>
59 #include <net/if_types.h>
60 #include <net/if_arp.h>
61 #include <net/if_var.h>
62 #include <net/ethernet.h>
63
64 #include <netgraph/ng_message.h>
65 #include <netgraph/netgraph.h>
66 #include <netgraph/ng_parse.h>
67 #include <netgraph/ng_ether.h>
68
69 #define IFP2NG(ifp) ((struct ng_node *)((struct arpcom *)(ifp))->ac_netgraph)
70 #define IFP2NG_SET(ifp, val) (((struct arpcom *)(ifp))->ac_netgraph = (val))
71
72 /* Per-node private data */
73 struct private {
74 struct ifnet *ifp; /* associated interface */
75 hook_p upper; /* upper hook connection */
76 hook_p lower; /* lower hook connection */
77 hook_p orphan; /* orphan hook connection */
78 u_char autoSrcAddr; /* always overwrite source address */
79 u_char promisc; /* promiscuous mode enabled */
80 u_long hwassist; /* hardware checksum capabilities */
81 u_int flags; /* flags e.g. really die */
82 };
83 typedef struct private *priv_p;
84
85 /* Hook pointers used by if_ethersubr.c to callback to netgraph */
86 extern void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
87 extern void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m);
88 extern int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
89 extern void (*ng_ether_attach_p)(struct ifnet *ifp);
90 extern void (*ng_ether_detach_p)(struct ifnet *ifp);
91
92 /* Functional hooks called from if_ethersubr.c */
93 static void ng_ether_input(struct ifnet *ifp, struct mbuf **mp);
94 static void ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m);
95 static int ng_ether_output(struct ifnet *ifp, struct mbuf **mp);
96 static void ng_ether_attach(struct ifnet *ifp);
97 static void ng_ether_detach(struct ifnet *ifp);
98
99 /* Other functions */
100 static int ng_ether_rcv_lower(node_p node, struct mbuf *m);
101 static int ng_ether_rcv_upper(node_p node, struct mbuf *m);
102
103 /* Netgraph node methods */
104 static ng_constructor_t ng_ether_constructor;
105 static ng_rcvmsg_t ng_ether_rcvmsg;
106 static ng_shutdown_t ng_ether_shutdown;
107 static ng_newhook_t ng_ether_newhook;
108 static ng_connect_t ng_ether_connect;
109 static ng_rcvdata_t ng_ether_rcvdata;
110 static ng_disconnect_t ng_ether_disconnect;
111 static int ng_ether_mod_event(module_t mod, int event, void *data);
112
113 /* List of commands and how to convert arguments to/from ASCII */
114 static const struct ng_cmdlist ng_ether_cmdlist[] = {
115 {
116 NGM_ETHER_COOKIE,
117 NGM_ETHER_GET_IFNAME,
118 "getifname",
119 NULL,
120 &ng_parse_string_type
121 },
122 {
123 NGM_ETHER_COOKIE,
124 NGM_ETHER_GET_IFINDEX,
125 "getifindex",
126 NULL,
127 &ng_parse_int32_type
128 },
129 {
130 NGM_ETHER_COOKIE,
131 NGM_ETHER_GET_ENADDR,
132 "getenaddr",
133 NULL,
134 &ng_parse_enaddr_type
135 },
136 {
137 NGM_ETHER_COOKIE,
138 NGM_ETHER_SET_ENADDR,
139 "setenaddr",
140 &ng_parse_enaddr_type,
141 NULL
142 },
143 {
144 NGM_ETHER_COOKIE,
145 NGM_ETHER_GET_PROMISC,
146 "getpromisc",
147 NULL,
148 &ng_parse_int32_type
149 },
150 {
151 NGM_ETHER_COOKIE,
152 NGM_ETHER_SET_PROMISC,
153 "setpromisc",
154 &ng_parse_int32_type,
155 NULL
156 },
157 {
158 NGM_ETHER_COOKIE,
159 NGM_ETHER_GET_AUTOSRC,
160 "getautosrc",
161 NULL,
162 &ng_parse_int32_type
163 },
164 {
165 NGM_ETHER_COOKIE,
166 NGM_ETHER_SET_AUTOSRC,
167 "setautosrc",
168 &ng_parse_int32_type,
169 NULL
170 },
171 { 0 }
172 };
173
174 static struct ng_type ng_ether_typestruct = {
175 .version = NG_ABI_VERSION,
176 .name = NG_ETHER_NODE_TYPE,
177 .mod_event = ng_ether_mod_event,
178 .constructor = ng_ether_constructor,
179 .rcvmsg = ng_ether_rcvmsg,
180 .shutdown = ng_ether_shutdown,
181 .newhook = ng_ether_newhook,
182 .connect = ng_ether_connect,
183 .rcvdata = ng_ether_rcvdata,
184 .disconnect = ng_ether_disconnect,
185 .cmdlist = ng_ether_cmdlist,
186 };
187 MODULE_VERSION(ng_ether, 1);
188 NETGRAPH_INIT(ether, &ng_ether_typestruct);
189
190 /******************************************************************
191 ETHERNET FUNCTION HOOKS
192 ******************************************************************/
193
194 /*
195 * Handle a packet that has come in on an interface. We get to
196 * look at it here before any upper layer protocols do.
197 *
198 * NOTE: this function will get called at splimp()
199 */
200 static void
201 ng_ether_input(struct ifnet *ifp, struct mbuf **mp)
202 {
203 const node_p node = IFP2NG(ifp);
204 const priv_p priv = NG_NODE_PRIVATE(node);
205 int error;
206
207 /* If "lower" hook not connected, let packet continue */
208 if (priv->lower == NULL)
209 return;
210 NG_SEND_DATA_ONLY(error, priv->lower, *mp); /* sets *mp = NULL */
211 }
212
213 /*
214 * Handle a packet that has come in on an interface, and which
215 * does not match any of our known protocols (an ``orphan'').
216 *
217 * NOTE: this function will get called at splimp()
218 */
219 static void
220 ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m)
221 {
222 const node_p node = IFP2NG(ifp);
223 const priv_p priv = NG_NODE_PRIVATE(node);
224 int error;
225
226 /* If "orphan" hook not connected, discard packet */
227 if (priv->orphan == NULL) {
228 m_freem(m);
229 return;
230 }
231 NG_SEND_DATA_ONLY(error, priv->orphan, m);
232 }
233
234 /*
235 * Handle a packet that is going out on an interface.
236 * The Ethernet header is already attached to the mbuf.
237 */
238 static int
239 ng_ether_output(struct ifnet *ifp, struct mbuf **mp)
240 {
241 const node_p node = IFP2NG(ifp);
242 const priv_p priv = NG_NODE_PRIVATE(node);
243 int error = 0;
244
245 /* If "upper" hook not connected, let packet continue */
246 if (priv->upper == NULL)
247 return (0);
248
249 /* Send it out "upper" hook */
250 NG_SEND_DATA_ONLY(error, priv->upper, *mp);
251 return (error);
252 }
253
254 /*
255 * A new Ethernet interface has been attached.
256 * Create a new node for it, etc.
257 */
258 static void
259 ng_ether_attach(struct ifnet *ifp)
260 {
261 priv_p priv;
262 node_p node;
263
264 /* Create node */
265 KASSERT(!IFP2NG(ifp), ("%s: node already exists?", __func__));
266 if (ng_make_node_common(&ng_ether_typestruct, &node) != 0) {
267 log(LOG_ERR, "%s: can't %s for %s\n",
268 __func__, "create node", ifp->if_xname);
269 return;
270 }
271
272 /* Allocate private data */
273 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
274 if (priv == NULL) {
275 log(LOG_ERR, "%s: can't %s for %s\n",
276 __func__, "allocate memory", ifp->if_xname);
277 NG_NODE_UNREF(node);
278 return;
279 }
280 NG_NODE_SET_PRIVATE(node, priv);
281 priv->ifp = ifp;
282 IFP2NG_SET(ifp, node);
283 priv->autoSrcAddr = 1;
284 priv->hwassist = ifp->if_hwassist;
285
286 /* Try to give the node the same name as the interface */
287 if (ng_name_node(node, ifp->if_xname) != 0) {
288 log(LOG_WARNING, "%s: can't name node %s\n",
289 __func__, ifp->if_xname);
290 }
291 }
292
293 /*
294 * An Ethernet interface is being detached.
295 * REALLY Destroy its node.
296 */
297 static void
298 ng_ether_detach(struct ifnet *ifp)
299 {
300 const node_p node = IFP2NG(ifp);
301 const priv_p priv = NG_NODE_PRIVATE(node);
302
303 NG_NODE_REALLY_DIE(node); /* Force real removal of node */
304 /*
305 * We can't assume the ifnet is still around when we run shutdown
306 * So zap it now. XXX We HOPE that anything running at this time
307 * handles it (as it should in the non netgraph case).
308 */
309 IFP2NG_SET(ifp, NULL);
310 priv->ifp = NULL; /* XXX race if interrupted an output packet */
311 ng_rmnode_self(node); /* remove all netgraph parts */
312 }
313
314 /******************************************************************
315 NETGRAPH NODE METHODS
316 ******************************************************************/
317
318 /*
319 * It is not possible or allowable to create a node of this type.
320 * Nodes get created when the interface is attached (or, when
321 * this node type's KLD is loaded).
322 */
323 static int
324 ng_ether_constructor(node_p node)
325 {
326 return (EINVAL);
327 }
328
329 /*
330 * Check for attaching a new hook.
331 */
332 static int
333 ng_ether_newhook(node_p node, hook_p hook, const char *name)
334 {
335 const priv_p priv = NG_NODE_PRIVATE(node);
336 hook_p *hookptr;
337
338 /* Divert hook is an alias for lower */
339 if (strcmp(name, NG_ETHER_HOOK_DIVERT) == 0)
340 name = NG_ETHER_HOOK_LOWER;
341
342 /* Which hook? */
343 if (strcmp(name, NG_ETHER_HOOK_UPPER) == 0)
344 hookptr = &priv->upper;
345 else if (strcmp(name, NG_ETHER_HOOK_LOWER) == 0)
346 hookptr = &priv->lower;
347 else if (strcmp(name, NG_ETHER_HOOK_ORPHAN) == 0)
348 hookptr = &priv->orphan;
349 else
350 return (EINVAL);
351
352 /* Check if already connected (shouldn't be, but doesn't hurt) */
353 if (*hookptr != NULL)
354 return (EISCONN);
355
356 /* Disable hardware checksums while 'upper' hook is connected */
357 if (hookptr == &priv->upper)
358 priv->ifp->if_hwassist = 0;
359
360 /* OK */
361 *hookptr = hook;
362 return (0);
363 }
364
365 /*
366 * Hooks are attached, adjust to force queueing.
367 * We don't really care which hook it is.
368 * they should all be queuing for outgoing data.
369 */
370 static int
371 ng_ether_connect(hook_p hook)
372 {
373 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
374 return (0);
375 }
376
377 /*
378 * Receive an incoming control message.
379 */
380 static int
381 ng_ether_rcvmsg(node_p node, item_p item, hook_p lasthook)
382 {
383 const priv_p priv = NG_NODE_PRIVATE(node);
384 struct ng_mesg *resp = NULL;
385 int error = 0;
386 struct ng_mesg *msg;
387
388 NGI_GET_MSG(item, msg);
389 switch (msg->header.typecookie) {
390 case NGM_ETHER_COOKIE:
391 switch (msg->header.cmd) {
392 case NGM_ETHER_GET_IFNAME:
393 NG_MKRESPONSE(resp, msg, IFNAMSIZ + 1, M_NOWAIT);
394 if (resp == NULL) {
395 error = ENOMEM;
396 break;
397 }
398 strlcpy(resp->data, priv->ifp->if_xname, IFNAMSIZ + 1);
399 break;
400 case NGM_ETHER_GET_IFINDEX:
401 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
402 if (resp == NULL) {
403 error = ENOMEM;
404 break;
405 }
406 *((u_int32_t *)resp->data) = priv->ifp->if_index;
407 break;
408 case NGM_ETHER_GET_ENADDR:
409 NG_MKRESPONSE(resp, msg, ETHER_ADDR_LEN, M_NOWAIT);
410 if (resp == NULL) {
411 error = ENOMEM;
412 break;
413 }
414 bcopy((IFP2AC(priv->ifp))->ac_enaddr,
415 resp->data, ETHER_ADDR_LEN);
416 break;
417 case NGM_ETHER_SET_ENADDR:
418 {
419 if (msg->header.arglen != ETHER_ADDR_LEN) {
420 error = EINVAL;
421 break;
422 }
423 error = if_setlladdr(priv->ifp,
424 (u_char *)msg->data, ETHER_ADDR_LEN);
425 break;
426 }
427 case NGM_ETHER_GET_PROMISC:
428 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
429 if (resp == NULL) {
430 error = ENOMEM;
431 break;
432 }
433 *((u_int32_t *)resp->data) = priv->promisc;
434 break;
435 case NGM_ETHER_SET_PROMISC:
436 {
437 u_char want;
438
439 if (msg->header.arglen != sizeof(u_int32_t)) {
440 error = EINVAL;
441 break;
442 }
443 want = !!*((u_int32_t *)msg->data);
444 if (want ^ priv->promisc) {
445 if ((error = ifpromisc(priv->ifp, want)) != 0)
446 break;
447 priv->promisc = want;
448 }
449 break;
450 }
451 case NGM_ETHER_GET_AUTOSRC:
452 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
453 if (resp == NULL) {
454 error = ENOMEM;
455 break;
456 }
457 *((u_int32_t *)resp->data) = priv->autoSrcAddr;
458 break;
459 case NGM_ETHER_SET_AUTOSRC:
460 if (msg->header.arglen != sizeof(u_int32_t)) {
461 error = EINVAL;
462 break;
463 }
464 priv->autoSrcAddr = !!*((u_int32_t *)msg->data);
465 break;
466 default:
467 error = EINVAL;
468 break;
469 }
470 break;
471 default:
472 error = EINVAL;
473 break;
474 }
475 NG_RESPOND_MSG(error, node, item, resp);
476 NG_FREE_MSG(msg);
477 return (error);
478 }
479
480 /*
481 * Receive data on a hook.
482 */
483 static int
484 ng_ether_rcvdata(hook_p hook, item_p item)
485 {
486 const node_p node = NG_HOOK_NODE(hook);
487 const priv_p priv = NG_NODE_PRIVATE(node);
488 struct mbuf *m;
489
490 NGI_GET_M(item, m);
491 NG_FREE_ITEM(item);
492
493 if (hook == priv->lower || hook == priv->orphan)
494 return ng_ether_rcv_lower(node, m);
495 if (hook == priv->upper)
496 return ng_ether_rcv_upper(node, m);
497 panic("%s: weird hook", __func__);
498 #ifdef RESTARTABLE_PANICS /* so we don't get an error msg in LINT */
499 return (0);
500 #endif
501 }
502
503 /*
504 * Handle an mbuf received on the "lower" or "orphan" hook.
505 */
506 static int
507 ng_ether_rcv_lower(node_p node, struct mbuf *m)
508 {
509 const priv_p priv = NG_NODE_PRIVATE(node);
510 struct ifnet *const ifp = priv->ifp;
511
512 /* Check whether interface is ready for packets */
513 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
514 NG_FREE_M(m);
515 return (ENETDOWN);
516 }
517
518 /* Make sure header is fully pulled up */
519 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
520 NG_FREE_M(m);
521 return (EINVAL);
522 }
523 if (m->m_len < sizeof(struct ether_header)
524 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
525 return (ENOBUFS);
526
527 /* Drop in the MAC address if desired */
528 if (priv->autoSrcAddr) {
529
530 /* Make the mbuf writable if it's not already */
531 if (!M_WRITABLE(m)
532 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
533 return (ENOBUFS);
534
535 /* Overwrite source MAC address */
536 bcopy((IFP2AC(ifp))->ac_enaddr,
537 mtod(m, struct ether_header *)->ether_shost,
538 ETHER_ADDR_LEN);
539 }
540
541 /* Send it on its way */
542 return ether_output_frame(ifp, m);
543 }
544
545 /*
546 * Handle an mbuf received on the "upper" hook.
547 */
548 static int
549 ng_ether_rcv_upper(node_p node, struct mbuf *m)
550 {
551 const priv_p priv = NG_NODE_PRIVATE(node);
552
553 m->m_pkthdr.rcvif = priv->ifp;
554
555 /* Route packet back in */
556 ether_demux(priv->ifp, m);
557 return (0);
558 }
559
560 /*
561 * Shutdown node. This resets the node but does not remove it
562 * unless the REALLY_DIE flag is set.
563 */
564 static int
565 ng_ether_shutdown(node_p node)
566 {
567 const priv_p priv = NG_NODE_PRIVATE(node);
568
569 if (node->nd_flags & NGF_REALLY_DIE) {
570 /*
571 * WE came here because the ethernet card is being unloaded,
572 * so stop being persistant.
573 * Actually undo all the things we did on creation.
574 * Assume the ifp has already been freed.
575 */
576 NG_NODE_SET_PRIVATE(node, NULL);
577 FREE(priv, M_NETGRAPH);
578 NG_NODE_UNREF(node); /* free node itself */
579 return (0);
580 }
581 if (priv->promisc) { /* disable promiscuous mode */
582 (void)ifpromisc(priv->ifp, 0);
583 priv->promisc = 0;
584 }
585 priv->autoSrcAddr = 1; /* reset auto-src-addr flag */
586 NG_NODE_REVIVE(node); /* Signal ng_rmnode we are persisant */
587
588 return (0);
589 }
590
591 /*
592 * Hook disconnection.
593 */
594 static int
595 ng_ether_disconnect(hook_p hook)
596 {
597 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
598
599 if (hook == priv->upper) {
600 priv->upper = NULL;
601 if (priv->ifp != NULL) /* restore h/w csum */
602 priv->ifp->if_hwassist = priv->hwassist;
603 } else if (hook == priv->lower)
604 priv->lower = NULL;
605 else if (hook == priv->orphan)
606 priv->orphan = NULL;
607 else
608 panic("%s: weird hook", __func__);
609 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
610 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
611 ng_rmnode_self(NG_HOOK_NODE(hook)); /* reset node */
612 return (0);
613 }
614
615 /******************************************************************
616 INITIALIZATION
617 ******************************************************************/
618
619 /*
620 * Handle loading and unloading for this node type.
621 */
622 static int
623 ng_ether_mod_event(module_t mod, int event, void *data)
624 {
625 struct ifnet *ifp;
626 int error = 0;
627 int s;
628
629 s = splnet();
630 switch (event) {
631 case MOD_LOAD:
632
633 /* Register function hooks */
634 if (ng_ether_attach_p != NULL) {
635 error = EEXIST;
636 break;
637 }
638 ng_ether_attach_p = ng_ether_attach;
639 ng_ether_detach_p = ng_ether_detach;
640 ng_ether_output_p = ng_ether_output;
641 ng_ether_input_p = ng_ether_input;
642 ng_ether_input_orphan_p = ng_ether_input_orphan;
643
644 /* Create nodes for any already-existing Ethernet interfaces */
645 IFNET_RLOCK();
646 TAILQ_FOREACH(ifp, &ifnet, if_link) {
647 if (ifp->if_type == IFT_ETHER
648 || ifp->if_type == IFT_L2VLAN)
649 ng_ether_attach(ifp);
650 }
651 IFNET_RUNLOCK();
652 break;
653
654 case MOD_UNLOAD:
655
656 /*
657 * Note that the base code won't try to unload us until
658 * all nodes have been removed, and that can't happen
659 * until all Ethernet interfaces are removed. In any
660 * case, we know there are no nodes left if the action
661 * is MOD_UNLOAD, so there's no need to detach any nodes.
662 */
663
664 /* Unregister function hooks */
665 ng_ether_attach_p = NULL;
666 ng_ether_detach_p = NULL;
667 ng_ether_output_p = NULL;
668 ng_ether_input_p = NULL;
669 ng_ether_input_orphan_p = NULL;
670 break;
671
672 default:
673 error = EOPNOTSUPP;
674 break;
675 }
676 splx(s);
677 return (error);
678 }
679
Cache object: 1c3f0171280c0e6d4d467159f3e72713
|