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kernel - support dummy reallocblks in devfs
[dragonfly.git] / sys / netgraph7 / pppoe / ng_pppoe.c
blob670aac206473595f50727a03f926ecda23dda812
1 /*
2 * ng_pppoe.c
3 */
4
5 /*-
6 * Copyright (c) 1996-1999 Whistle Communications, Inc.
7 * All rights reserved.
8 *
9 * Subject to the following obligations and disclaimer of warranty, use and
10 * redistribution of this software, in source or object code forms, with or
11 * without modifications are expressly permitted by Whistle Communications;
12 * provided, however, that:
13 * 1. Any and all reproductions of the source or object code must include the
14 * copyright notice above and the following disclaimer of warranties; and
15 * 2. No rights are granted, in any manner or form, to use Whistle
16 * Communications, Inc. trademarks, including the mark "WHISTLE
17 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
18 * such appears in the above copyright notice or in the software.
19 *
20 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
21 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
22 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
23 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
25 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
26 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
27 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
28 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
29 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
30 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
31 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
36 * OF SUCH DAMAGE.
37 *
38 * Author: Julian Elischer <julian@freebsd.org>
39 *
40 * $FreeBSD: src/sys/netgraph/ng_pppoe.c,v 1.94 2008/03/03 19:36:03 mav Exp $
41 * $Whistle: ng_pppoe.c,v 1.10 1999/11/01 09:24:52 julian Exp $
42 */
43
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/mbuf.h>
48 #include <sys/malloc.h>
49 #include <sys/errno.h>
50 #include <sys/syslog.h>
51 #include <net/ethernet.h>
52
53 #include <netgraph7/ng_message.h>
54 #include <netgraph7/netgraph.h>
55 #include <netgraph7/ng_parse.h>
56 #include "ng_pppoe.h"
57 #include <netgraph7/ether/ng_ether.h>
58
59 #ifdef NG_SEPARATE_MALLOC
60 MALLOC_DEFINE(M_NETGRAPH_PPPOE, "netgraph_pppoe", "netgraph pppoe node");
61 #else
62 #define M_NETGRAPH_PPPOE M_NETGRAPH
63 #endif
64
65 #define SIGNOFF "session closed"
66
67 /*
68 * This section contains the netgraph method declarations for the
69 * pppoe node. These methods define the netgraph pppoe 'type'.
70 */
71
72 static ng_constructor_t ng_pppoe_constructor;
73 static ng_rcvmsg_t ng_pppoe_rcvmsg;
74 static ng_shutdown_t ng_pppoe_shutdown;
75 static ng_newhook_t ng_pppoe_newhook;
76 static ng_connect_t ng_pppoe_connect;
77 static ng_rcvdata_t ng_pppoe_rcvdata;
78 static ng_rcvdata_t ng_pppoe_rcvdata_ether;
79 static ng_rcvdata_t ng_pppoe_rcvdata_debug;
80 static ng_disconnect_t ng_pppoe_disconnect;
81
82 /* Parse type for struct ngpppoe_init_data */
83 static const struct ng_parse_struct_field ngpppoe_init_data_type_fields[]
84 = NG_PPPOE_INIT_DATA_TYPE_INFO;
85 static const struct ng_parse_type ngpppoe_init_data_state_type = {
86 &ng_parse_struct_type,
87 &ngpppoe_init_data_type_fields
88 };
89
90 /* Parse type for struct ngpppoe_sts */
91 static const struct ng_parse_struct_field ng_pppoe_sts_type_fields[]
92 = NG_PPPOE_STS_TYPE_INFO;
93 static const struct ng_parse_type ng_pppoe_sts_state_type = {
94 &ng_parse_struct_type,
95 &ng_pppoe_sts_type_fields
96 };
97
98 /* List of commands and how to convert arguments to/from ASCII */
99 static const struct ng_cmdlist ng_pppoe_cmds[] = {
100 {
101 NGM_PPPOE_COOKIE,
102 NGM_PPPOE_CONNECT,
103 "pppoe_connect",
104 &ngpppoe_init_data_state_type,
105 NULL
106 },
107 {
108 NGM_PPPOE_COOKIE,
109 NGM_PPPOE_LISTEN,
110 "pppoe_listen",
111 &ngpppoe_init_data_state_type,
112 NULL
113 },
114 {
115 NGM_PPPOE_COOKIE,
116 NGM_PPPOE_OFFER,
117 "pppoe_offer",
118 &ngpppoe_init_data_state_type,
119 NULL
120 },
121 {
122 NGM_PPPOE_COOKIE,
123 NGM_PPPOE_SERVICE,
124 "pppoe_service",
125 &ngpppoe_init_data_state_type,
126 NULL
127 },
128 {
129 NGM_PPPOE_COOKIE,
130 NGM_PPPOE_SUCCESS,
131 "pppoe_success",
132 &ng_pppoe_sts_state_type,
133 NULL
134 },
135 {
136 NGM_PPPOE_COOKIE,
137 NGM_PPPOE_FAIL,
138 "pppoe_fail",
139 &ng_pppoe_sts_state_type,
140 NULL
141 },
142 {
143 NGM_PPPOE_COOKIE,
144 NGM_PPPOE_CLOSE,
145 "pppoe_close",
146 &ng_pppoe_sts_state_type,
147 NULL
148 },
149 {
150 NGM_PPPOE_COOKIE,
151 NGM_PPPOE_SETMODE,
152 "pppoe_setmode",
153 &ng_parse_string_type,
154 NULL
155 },
156 {
157 NGM_PPPOE_COOKIE,
158 NGM_PPPOE_GETMODE,
159 "pppoe_getmode",
160 NULL,
161 &ng_parse_string_type
162 },
163 {
164 NGM_PPPOE_COOKIE,
165 NGM_PPPOE_SETENADDR,
166 "setenaddr",
167 &ng_parse_enaddr_type,
168 NULL
169 },
170 { 0 }
171 };
172
173 /* Netgraph node type descriptor */
174 static struct ng_type typestruct = {
175 .version = NG_ABI_VERSION,
176 .name = NG_PPPOE_NODE_TYPE,
177 .constructor = ng_pppoe_constructor,
178 .rcvmsg = ng_pppoe_rcvmsg,
179 .shutdown = ng_pppoe_shutdown,
180 .newhook = ng_pppoe_newhook,
181 .connect = ng_pppoe_connect,
182 .rcvdata = ng_pppoe_rcvdata,
183 .disconnect = ng_pppoe_disconnect,
184 .cmdlist = ng_pppoe_cmds,
185 };
186 NETGRAPH_INIT(pppoe, &typestruct);
187
188 /*
189 * States for the session state machine.
190 * These have no meaning if there is no hook attached yet.
191 */
192 enum state {
193 PPPOE_SNONE=0, /* [both] Initial state */
194 PPPOE_LISTENING, /* [Daemon] Listening for discover initiation pkt */
195 PPPOE_SINIT, /* [Client] Sent discovery initiation */
196 PPPOE_PRIMED, /* [Server] Awaiting PADI from daemon */
197 PPPOE_SOFFER, /* [Server] Sent offer message (got PADI)*/
198 PPPOE_SREQ, /* [Client] Sent a Request */
199 PPPOE_NEWCONNECTED, /* [Server] Connection established, No data received */
200 PPPOE_CONNECTED, /* [Both] Connection established, Data received */
201 PPPOE_DEAD /* [Both] */
202 };
203
204 #define NUMTAGS 20 /* number of tags we are set up to work with */
205
206 /*
207 * Information we store for each hook on each node for negotiating the
208 * session. The mbuf and cluster are freed once negotiation has completed.
209 * The whole negotiation block is then discarded.
210 */
211
212 struct sess_neg {
213 struct mbuf *m; /* holds cluster with last sent packet */
214 union packet *pkt; /* points within the above cluster */
215 struct callout handle; /* see timeout(9) */
216 u_int timeout; /* 0,1,2,4,8,16 etc. seconds */
217 u_int numtags;
218 const struct pppoe_tag *tags[NUMTAGS];
219 u_int service_len;
220 u_int ac_name_len;
221
222 struct datatag service;
223 struct datatag ac_name;
224 };
225 typedef struct sess_neg *negp;
226
227 /*
228 * Session information that is needed after connection.
229 */
230 struct sess_con {
231 hook_p hook;
232 uint16_t Session_ID;
233 enum state state;
234 ng_ID_t creator; /* who to notify */
235 struct pppoe_full_hdr pkt_hdr; /* used when connected */
236 negp neg; /* used when negotiating */
237 LIST_ENTRY(sess_con) sessions;
238 };
239 typedef struct sess_con *sessp;
240
241 #define SESSHASHSIZE 0x0100
242 #define SESSHASH(x) (((x) ^ ((x) >> 8)) & (SESSHASHSIZE - 1))
243
244 struct sess_hash_entry {
245 struct mtx mtx;
246 LIST_HEAD(hhead, sess_con) head;
247 };
248
249 /*
250 * Information we store for each node
251 */
252 struct PPPoE {
253 node_p node; /* back pointer to node */
254 hook_p ethernet_hook;
255 hook_p debug_hook;
256 u_int packets_in; /* packets in from ethernet */
257 u_int packets_out; /* packets out towards ethernet */
258 uint32_t flags;
259 #define COMPAT_3COM 0x00000001
260 #define COMPAT_DLINK 0x00000002
261 struct ether_header eh;
262 LIST_HEAD(, sess_con) listeners;
263 struct sess_hash_entry sesshash[SESSHASHSIZE];
264 };
265 typedef struct PPPoE *priv_p;
266
267 union uniq {
268 char bytes[sizeof(void *)];
269 void *pointer;
270 };
271
272 #define LEAVE(x) do { error = x; goto quit; } while(0)
273 static void pppoe_start(sessp sp);
274 static void pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2);
275 static const struct pppoe_tag *scan_tags(sessp sp,
276 const struct pppoe_hdr* ph);
277 static int pppoe_send_event(sessp sp, enum cmd cmdid);
278
279 /*************************************************************************
280 * Some basic utilities from the Linux version with author's permission.*
281 * Author: Michal Ostrowski <mostrows@styx.uwaterloo.ca> *
282 ************************************************************************/
283
284
285
286 /*
287 * Return the location where the next tag can be put
288 */
289 static __inline const struct pppoe_tag*
290 next_tag(const struct pppoe_hdr* ph)
291 {
292 return (const struct pppoe_tag*)(((const char*)&ph->tag[0])
293 + ntohs(ph->length));
294 }
295
296 /*
297 * Look for a tag of a specific type.
298 * Don't trust any length the other end says,
299 * but assume we already sanity checked ph->length.
300 */
301 static const struct pppoe_tag*
302 get_tag(const struct pppoe_hdr* ph, uint16_t idx)
303 {
304 const char *const end = (const char *)next_tag(ph);
305 const struct pppoe_tag *pt = &ph->tag[0];
306 const char *ptn;
307
308 /*
309 * Keep processing tags while a tag header will still fit.
310 */
311 while((const char*)(pt + 1) <= end) {
312 /*
313 * If the tag data would go past the end of the packet, abort.
314 */
315 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len));
316 if (ptn > end) {
317 CTR2(KTR_NET, "%20s: invalid length for tag %d",
318 __func__, idx);
319 return (NULL);
320 }
321 if (pt->tag_type == idx) {
322 CTR2(KTR_NET, "%20s: found tag %d", __func__, idx);
323 return (pt);
324 }
325
326 pt = (const struct pppoe_tag*)ptn;
327 }
328
329 CTR2(KTR_NET, "%20s: not found tag %d", __func__, idx);
330 return (NULL);
331 }
332
333 /**************************************************************************
334 * Inlines to initialise or add tags to a session's tag list.
335 **************************************************************************/
336 /*
337 * Initialise the session's tag list.
338 */
339 static void
340 init_tags(sessp sp)
341 {
342 KASSERT(sp->neg != NULL, ("%s: no neg", __func__));
343 sp->neg->numtags = 0;
344 }
345
346 static void
347 insert_tag(sessp sp, const struct pppoe_tag *tp)
348 {
349 negp neg = sp->neg;
350 int i;
351
352 KASSERT(neg != NULL, ("%s: no neg", __func__));
353 if ((i = neg->numtags++) < NUMTAGS) {
354 neg->tags[i] = tp;
355 } else {
356 log(LOG_NOTICE, "ng_pppoe: asked to add too many tags to "
357 "packet\n");
358 neg->numtags--;
359 }
360 }
361
362 /*
363 * Make up a packet, using the tags filled out for the session.
364 *
365 * Assume that the actual pppoe header and ethernet header
366 * are filled out externally to this routine.
367 * Also assume that neg->wh points to the correct
368 * location at the front of the buffer space.
369 */
370 static void
371 make_packet(sessp sp) {
372 struct pppoe_full_hdr *wh = &sp->neg->pkt->pkt_header;
373 const struct pppoe_tag **tag;
374 char *dp;
375 int count;
376 int tlen;
377 uint16_t length = 0;
378
379 KASSERT((sp->neg != NULL) && (sp->neg->m != NULL),
380 ("%s: called from wrong state", __func__));
381 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
382
383 dp = (char *)wh->ph.tag;
384 for (count = 0, tag = sp->neg->tags;
385 ((count < sp->neg->numtags) && (count < NUMTAGS));
386 tag++, count++) {
387 tlen = ntohs((*tag)->tag_len) + sizeof(**tag);
388 if ((length + tlen) > (ETHER_MAX_LEN - 4 - sizeof(*wh))) {
389 log(LOG_NOTICE, "ng_pppoe: tags too long\n");
390 sp->neg->numtags = count;
391 break; /* XXX chop off what's too long */
392 }
393 bcopy(*tag, dp, tlen);
394 length += tlen;
395 dp += tlen;
396 }
397 wh->ph.length = htons(length);
398 sp->neg->m->m_len = length + sizeof(*wh);
399 sp->neg->m->m_pkthdr.len = length + sizeof(*wh);
400 }
401
402 /**************************************************************************
403 * Routines to match a service. *
404 **************************************************************************/
405
406 /*
407 * Find a hook that has a service string that matches that
408 * we are seeking. For now use a simple string.
409 * In the future we may need something like regexp().
410 *
411 * Null string is a wildcard (ANY service), according to RFC2516.
412 * And historical FreeBSD wildcard is also "*".
413 */
414
415 static hook_p
416 pppoe_match_svc(node_p node, const struct pppoe_tag *tag)
417 {
418 const priv_p privp = NG_NODE_PRIVATE(node);
419 sessp sp;
420
421 LIST_FOREACH(sp, &privp->listeners, sessions) {
422 negp neg = sp->neg;
423
424 /* Empty Service-Name matches any service. */
425 if (neg->service_len == 0)
426 break;
427
428 /* Special case for a blank or "*" service name (wildcard). */
429 if (neg->service_len == 1 && neg->service.data[0] == '*')
430 break;
431
432 /* If the lengths don't match, that aint it. */
433 if (neg->service_len != ntohs(tag->tag_len))
434 continue;
435
436 if (strncmp(tag->tag_data, neg->service.data,
437 ntohs(tag->tag_len)) == 0)
438 break;
439 }
440 CTR3(KTR_NET, "%20s: matched %p for %s", __func__,
441 sp?sp->hook:NULL, tag->tag_data);
442
443 return (sp?sp->hook:NULL);
444 }
445
446 /*
447 * Broadcast the PADI packet in m0 to all listening hooks.
448 * This routine is called when a PADI with empty Service-Name
449 * tag is received. Client should receive PADOs with all
450 * available services.
451 */
452 static int
453 pppoe_broadcast_padi(node_p node, struct mbuf *m0)
454 {
455 const priv_p privp = NG_NODE_PRIVATE(node);
456 sessp sp;
457 int error = 0;
458
459 LIST_FOREACH(sp, &privp->listeners, sessions) {
460 struct mbuf *m;
461
462 m = m_dup(m0, M_NOWAIT);
463 if (m == NULL)
464 return (ENOMEM);
465 NG_SEND_DATA_ONLY(error, sp->hook, m);
466 if (error)
467 return (error);
468 }
469
470 return (0);
471 }
472
473 /*
474 * Find a hook, which name equals to given service.
475 */
476 static hook_p
477 pppoe_find_svc(node_p node, const char *svc_name, int svc_len)
478 {
479 const priv_p privp = NG_NODE_PRIVATE(node);
480 sessp sp;
481
482 LIST_FOREACH(sp, &privp->listeners, sessions) {
483 negp neg = sp->neg;
484
485 if (neg->service_len == svc_len &&
486 strncmp(svc_name, neg->service.data, svc_len) == 0)
487 return (sp->hook);
488 }
489
490 return (NULL);
491 }
492
493 /**************************************************************************
494 * Routines to find a particular session that matches an incoming packet. *
495 **************************************************************************/
496 /* Find free session and add to hash. */
497 static uint16_t
498 pppoe_getnewsession(sessp sp)
499 {
500 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
501 static uint16_t pppoe_sid = 1;
502 sessp tsp;
503 uint16_t val, hash;
504
505 restart:
506 /* Atomicity is not needed here as value will be checked. */
507 val = pppoe_sid++;
508 /* Spec says 0xFFFF is reserved, also don't use 0x0000. */
509 if (val == 0xffff || val == 0x0000)
510 val = pppoe_sid = 1;
511
512 /* Check it isn't already in use. */
513 hash = SESSHASH(val);
514 mtx_lock(&privp->sesshash[hash].mtx);
515 LIST_FOREACH(tsp, &privp->sesshash[hash].head, sessions) {
516 if (tsp->Session_ID == val)
517 break;
518 }
519 if (!tsp) {
520 sp->Session_ID = val;
521 LIST_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions);
522 }
523 mtx_unlock(&privp->sesshash[hash].mtx);
524 if (tsp)
525 goto restart;
526
527 CTR2(KTR_NET, "%20s: new sid %d", __func__, val);
528
529 return (val);
530 }
531
532 /* Add specified session to hash. */
533 static void
534 pppoe_addsession(sessp sp)
535 {
536 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
537 uint16_t hash = SESSHASH(sp->Session_ID);
538
539 mtx_lock(&privp->sesshash[hash].mtx);
540 LIST_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions);
541 mtx_unlock(&privp->sesshash[hash].mtx);
542 }
543
544 /* Delete specified session from hash. */
545 static void
546 pppoe_delsession(sessp sp)
547 {
548 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
549 uint16_t hash = SESSHASH(sp->Session_ID);
550
551 mtx_lock(&privp->sesshash[hash].mtx);
552 LIST_REMOVE(sp, sessions);
553 mtx_unlock(&privp->sesshash[hash].mtx);
554 }
555
556 /* Find matching peer/session combination. */
557 static sessp
558 pppoe_findsession(priv_p privp, const struct pppoe_full_hdr *wh)
559 {
560 uint16_t session = ntohs(wh->ph.sid);
561 uint16_t hash = SESSHASH(session);
562 sessp sp = NULL;
563
564 mtx_lock(&privp->sesshash[hash].mtx);
565 LIST_FOREACH(sp, &privp->sesshash[hash].head, sessions) {
566 if (sp->Session_ID == session &&
567 bcmp(sp->pkt_hdr.eh.ether_dhost,
568 wh->eh.ether_shost, ETHER_ADDR_LEN) == 0) {
569 break;
570 }
571 }
572 mtx_unlock(&privp->sesshash[hash].mtx);
573 CTR3(KTR_NET, "%20s: matched %p for %d", __func__, sp?sp->hook:NULL,
574 session);
575
576 return (sp);
577 }
578
579 static hook_p
580 pppoe_finduniq(node_p node, const struct pppoe_tag *tag)
581 {
582 hook_p hook = NULL;
583 union uniq uniq;
584
585 bcopy(tag->tag_data, uniq.bytes, sizeof(void *));
586 /* Cycle through all known hooks. */
587 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
588 /* Skip any nonsession hook. */
589 if (NG_HOOK_PRIVATE(hook) == NULL)
590 continue;
591 if (uniq.pointer == NG_HOOK_PRIVATE(hook))
592 break;
593 }
594 CTR3(KTR_NET, "%20s: matched %p for %p", __func__, hook, uniq.pointer);
595
596 return (hook);
597 }
598
599 /**************************************************************************
600 * Start of Netgraph entrypoints. *
601 **************************************************************************/
602
603 /*
604 * Allocate the private data structure and link it with node.
605 */
606 static int
607 ng_pppoe_constructor(node_p node)
608 {
609 priv_p privp;
610 int i;
611
612 /* Initialize private descriptor. */
613 privp = kmalloc(sizeof(*privp), M_NETGRAPH_PPPOE, M_WAITOK | M_NULLOK | M_ZERO);
614 if (privp == NULL)
615 return (ENOMEM);
616
617 /* Link structs together; this counts as our one reference to *node. */
618 NG_NODE_SET_PRIVATE(node, privp);
619 privp->node = node;
620
621 /* Initialize to standard mode. */
622 memset(&privp->eh.ether_dhost, 0xff, ETHER_ADDR_LEN);
623 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
624
625 LIST_INIT(&privp->listeners);
626 for (i = 0; i < SESSHASHSIZE; i++) {
627 mtx_init(&privp->sesshash[i].mtx, "ng_pppoe");
628 LIST_INIT(&privp->sesshash[i].head);
629 }
630
631 CTR3(KTR_NET, "%20s: created node [%x] (%p)",
632 __func__, node->nd_ID, node);
633
634 return (0);
635 }
636
637 /*
638 * Give our ok for a hook to be added...
639 * point the hook's private info to the hook structure.
640 *
641 * The following hook names are special:
642 * "ethernet": the hook that should be connected to a NIC.
643 * "debug": copies of data sent out here (when I write the code).
644 * All other hook names need only be unique. (the framework checks this).
645 */
646 static int
647 ng_pppoe_newhook(node_p node, hook_p hook, const char *name)
648 {
649 const priv_p privp = NG_NODE_PRIVATE(node);
650 sessp sp;
651
652 if (strcmp(name, NG_PPPOE_HOOK_ETHERNET) == 0) {
653 privp->ethernet_hook = hook;
654 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_ether);
655 } else if (strcmp(name, NG_PPPOE_HOOK_DEBUG) == 0) {
656 privp->debug_hook = hook;
657 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_debug);
658 } else {
659 /*
660 * Any other unique name is OK.
661 * The infrastructure has already checked that it's unique,
662 * so just allocate it and hook it in.
663 */
664 sp = kmalloc(sizeof(*sp), M_NETGRAPH_PPPOE, M_WAITOK | M_NULLOK | M_ZERO);
665 if (sp == NULL)
666 return (ENOMEM);
667
668 NG_HOOK_SET_PRIVATE(hook, sp);
669 sp->hook = hook;
670 }
671 CTR5(KTR_NET, "%20s: node [%x] (%p) connected hook %s (%p)",
672 __func__, node->nd_ID, node, name, hook);
673
674 return(0);
675 }
676
677 /*
678 * Hook has been added successfully. Request the MAC address of
679 * the underlying Ethernet node.
680 */
681 static int
682 ng_pppoe_connect(hook_p hook)
683 {
684 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
685 struct ng_mesg *msg;
686 int error;
687
688 if (hook != privp->ethernet_hook)
689 return (0);
690
691 /*
692 * If this is Ethernet hook, then request MAC address
693 * from our downstream.
694 */
695 NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_ENADDR, 0, M_WAITOK | M_NULLOK);
696 if (msg == NULL)
697 return (ENOBUFS);
698
699 /*
700 * Our hook and peer hook have HK_INVALID flag set,
701 * so we can't use NG_SEND_MSG_HOOK() macro here.
702 */
703 NG_SEND_MSG_ID(error, privp->node, msg,
704 NG_NODE_ID(NG_PEER_NODE(privp->ethernet_hook)),
705 NG_NODE_ID(privp->node));
706
707 return (error);
708 }
709 /*
710 * Get a netgraph control message.
711 * Check it is one we understand. If needed, send a response.
712 * We sometimes save the address for an async action later.
713 * Always free the message.
714 */
715 static int
716 ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
717 {
718 priv_p privp = NG_NODE_PRIVATE(node);
719 struct ngpppoe_init_data *ourmsg = NULL;
720 struct ng_mesg *resp = NULL;
721 int error = 0;
722 hook_p hook = NULL;
723 sessp sp = NULL;
724 negp neg = NULL;
725 struct ng_mesg *msg;
726
727 NGI_GET_MSG(item, msg);
728 CTR5(KTR_NET, "%20s: node [%x] (%p) got message %d with cookie %d",
729 __func__, node->nd_ID, node, msg->header.cmd,
730 msg->header.typecookie);
731
732 /* Deal with message according to cookie and command. */
733 switch (msg->header.typecookie) {
734 case NGM_PPPOE_COOKIE:
735 switch (msg->header.cmd) {
736 case NGM_PPPOE_CONNECT:
737 case NGM_PPPOE_LISTEN:
738 case NGM_PPPOE_OFFER:
739 case NGM_PPPOE_SERVICE:
740 ourmsg = (struct ngpppoe_init_data *)msg->data;
741 if (msg->header.arglen < sizeof(*ourmsg)) {
742 log(LOG_ERR, "ng_pppoe[%x]: init data too "
743 "small\n", node->nd_ID);
744 LEAVE(EMSGSIZE);
745 }
746 if (msg->header.arglen - sizeof(*ourmsg) >
747 PPPOE_SERVICE_NAME_SIZE) {
748 log(LOG_ERR, "ng_pppoe[%x]: service name "
749 "too big\n", node->nd_ID);
750 LEAVE(EMSGSIZE);
751 }
752 if (msg->header.arglen - sizeof(*ourmsg) <
753 ourmsg->data_len) {
754 log(LOG_ERR, "ng_pppoe[%x]: init data has bad "
755 "length, %d should be %zd\n", node->nd_ID,
756 ourmsg->data_len,
757 msg->header.arglen - sizeof (*ourmsg));
758 LEAVE(EMSGSIZE);
759 }
760
761 /* Make sure strcmp will terminate safely. */
762 ourmsg->hook[sizeof(ourmsg->hook) - 1] = '\0';
763
764 /* Find hook by name. */
765 hook = ng_findhook(node, ourmsg->hook);
766 if (hook == NULL)
767 LEAVE(ENOENT);
768
769 sp = NG_HOOK_PRIVATE(hook);
770 if (sp == NULL)
771 LEAVE(EINVAL);
772
773 if (msg->header.cmd == NGM_PPPOE_LISTEN) {
774 /*
775 * Ensure we aren't already listening for this
776 * service.
777 */
778 if (pppoe_find_svc(node, ourmsg->data,
779 ourmsg->data_len) != NULL)
780 LEAVE(EEXIST);
781 }
782
783 /*
784 * PPPOE_SERVICE advertisments are set up
785 * on sessions that are in PRIMED state.
786 */
787 if (msg->header.cmd == NGM_PPPOE_SERVICE)
788 break;
789
790 if (sp->state != PPPOE_SNONE) {
791 log(LOG_NOTICE, "ng_pppoe[%x]: Session already "
792 "active\n", node->nd_ID);
793 LEAVE(EISCONN);
794 }
795
796 /*
797 * Set up prototype header.
798 */
799 neg = kmalloc(sizeof(*neg), M_NETGRAPH_PPPOE,
800 M_WAITOK | M_NULLOK | M_ZERO);
801
802 if (neg == NULL)
803 LEAVE(ENOMEM);
804
805 neg->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
806 if (neg->m == NULL) {
807 kfree(neg, M_NETGRAPH_PPPOE);
808 LEAVE(ENOBUFS);
809 }
810 neg->m->m_pkthdr.rcvif = NULL;
811 sp->neg = neg;
812 ng_callout_init(&neg->handle);
813 neg->m->m_len = sizeof(struct pppoe_full_hdr);
814 neg->pkt = mtod(neg->m, union packet*);
815 memcpy((void *)&neg->pkt->pkt_header.eh,
816 &privp->eh, sizeof(struct ether_header));
817 neg->pkt->pkt_header.ph.ver = 0x1;
818 neg->pkt->pkt_header.ph.type = 0x1;
819 neg->pkt->pkt_header.ph.sid = 0x0000;
820 neg->timeout = 0;
821
822 sp->creator = NGI_RETADDR(item);
823 }
824 switch (msg->header.cmd) {
825 case NGM_PPPOE_GET_STATUS:
826 {
827 struct ngpppoestat *stats;
828
829 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_WAITOK | M_NULLOK);
830 if (!resp)
831 LEAVE(ENOMEM);
832
833 stats = (struct ngpppoestat *) resp->data;
834 stats->packets_in = privp->packets_in;
835 stats->packets_out = privp->packets_out;
836 break;
837 }
838 case NGM_PPPOE_CONNECT:
839 {
840 /*
841 * Check the hook exists and is Uninitialised.
842 * Send a PADI request, and start the timeout logic.
843 * Store the originator of this message so we can send
844 * a success of fail message to them later.
845 * Move the session to SINIT.
846 * Set up the session to the correct state and
847 * start it.
848 */
849 int i, acnlen = 0, acnsep = 0, srvlen;
850 for (i = 0; i < ourmsg->data_len; i++) {
851 if (ourmsg->data[i] == '\\') {
852 acnlen = i;
853 acnsep = 1;
854 break;
855 }
856 }
857 srvlen = ourmsg->data_len - acnlen - acnsep;
858
859 bcopy(ourmsg->data, neg->ac_name.data, acnlen);
860 neg->ac_name_len = acnlen;
861
862 neg->service.hdr.tag_type = PTT_SRV_NAME;
863 neg->service.hdr.tag_len = htons((uint16_t)srvlen);
864 bcopy(ourmsg->data + acnlen + acnsep,
865 neg->service.data, srvlen);
866 neg->service_len = srvlen;
867 pppoe_start(sp);
868 break;
869 }
870 case NGM_PPPOE_LISTEN:
871 /*
872 * Check the hook exists and is Uninitialised.
873 * Install the service matching string.
874 * Store the originator of this message so we can send
875 * a success of fail message to them later.
876 * Move the hook to 'LISTENING'
877 */
878 neg->service.hdr.tag_type = PTT_SRV_NAME;
879 neg->service.hdr.tag_len =
880 htons((uint16_t)ourmsg->data_len);
881
882 if (ourmsg->data_len)
883 bcopy(ourmsg->data, neg->service.data,
884 ourmsg->data_len);
885 neg->service_len = ourmsg->data_len;
886 neg->pkt->pkt_header.ph.code = PADT_CODE;
887 /*
888 * Wait for PADI packet coming from Ethernet.
889 */
890 sp->state = PPPOE_LISTENING;
891 LIST_INSERT_HEAD(&privp->listeners, sp, sessions);
892 break;
893 case NGM_PPPOE_OFFER:
894 /*
895 * Check the hook exists and is Uninitialised.
896 * Store the originator of this message so we can send
897 * a success of fail message to them later.
898 * Store the AC-Name given and go to PRIMED.
899 */
900 neg->ac_name.hdr.tag_type = PTT_AC_NAME;
901 neg->ac_name.hdr.tag_len =
902 htons((uint16_t)ourmsg->data_len);
903 if (ourmsg->data_len)
904 bcopy(ourmsg->data, neg->ac_name.data,
905 ourmsg->data_len);
906 neg->ac_name_len = ourmsg->data_len;
907 neg->pkt->pkt_header.ph.code = PADO_CODE;
908 /*
909 * Wait for PADI packet coming from hook.
910 */
911 sp->state = PPPOE_PRIMED;
912 break;
913 case NGM_PPPOE_SERVICE:
914 /*
915 * Check the session is primed.
916 * for now just allow ONE service to be advertised.
917 * If you do it twice you just overwrite.
918 */
919 if (sp->state != PPPOE_PRIMED) {
920 log(LOG_NOTICE, "ng_pppoe[%x]: session not "
921 "primed\n", node->nd_ID);
922 LEAVE(EISCONN);
923 }
924 neg = sp->neg;
925 neg->service.hdr.tag_type = PTT_SRV_NAME;
926 neg->service.hdr.tag_len =
927 htons((uint16_t)ourmsg->data_len);
928
929 if (ourmsg->data_len)
930 bcopy(ourmsg->data, neg->service.data,
931 ourmsg->data_len);
932 neg->service_len = ourmsg->data_len;
933 break;
934 case NGM_PPPOE_SETMODE:
935 {
936 char *s;
937 size_t len;
938
939 if (msg->header.arglen == 0)
940 LEAVE(EINVAL);
941
942 s = (char *)msg->data;
943 len = msg->header.arglen - 1;
944
945 /* Search for matching mode string. */
946 if (len == strlen(NG_PPPOE_STANDARD) &&
947 (strncmp(NG_PPPOE_STANDARD, s, len) == 0)) {
948 privp->flags = 0;
949 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
950 break;
951 }
952 if (len == strlen(NG_PPPOE_3COM) &&
953 (strncmp(NG_PPPOE_3COM, s, len) == 0)) {
954 privp->flags |= COMPAT_3COM;
955 privp->eh.ether_type =
956 ETHERTYPE_PPPOE_3COM_DISC;
957 break;
958 }
959 if (len == strlen(NG_PPPOE_DLINK) &&
960 (strncmp(NG_PPPOE_DLINK, s, len) == 0)) {
961 privp->flags |= COMPAT_DLINK;
962 break;
963 }
964 error = EINVAL;
965 break;
966 }
967 case NGM_PPPOE_GETMODE:
968 {
969 char *s;
970 size_t len = 0;
971
972 if (privp->flags == 0)
973 len += strlen(NG_PPPOE_STANDARD) + 1;
974 if (privp->flags & COMPAT_3COM)
975 len += strlen(NG_PPPOE_3COM) + 1;
976 if (privp->flags & COMPAT_DLINK)
977 len += strlen(NG_PPPOE_DLINK) + 1;
978
979 NG_MKRESPONSE(resp, msg, len, M_WAITOK | M_NULLOK);
980 if (resp == NULL)
981 LEAVE(ENOMEM);
982
983 s = (char *)resp->data;
984 if (privp->flags == 0) {
985 len = strlen(NG_PPPOE_STANDARD);
986 strlcpy(s, NG_PPPOE_STANDARD, len + 1);
987 break;
988 }
989 if (privp->flags & COMPAT_3COM) {
990 len = strlen(NG_PPPOE_3COM);
991 strlcpy(s, NG_PPPOE_3COM, len + 1);
992 s += len;
993 }
994 if (privp->flags & COMPAT_DLINK) {
995 if (s != resp->data)
996 *s++ = '|';
997 len = strlen(NG_PPPOE_DLINK);
998 strlcpy(s, NG_PPPOE_DLINK, len + 1);
999 }
1000 break;
1001 }
1002 case NGM_PPPOE_SETENADDR:
1003 if (msg->header.arglen != ETHER_ADDR_LEN)
1004 LEAVE(EINVAL);
1005 bcopy(msg->data, &privp->eh.ether_shost,
1006 ETHER_ADDR_LEN);
1007 break;
1008 default:
1009 LEAVE(EINVAL);
1010 }
1011 break;
1012 case NGM_ETHER_COOKIE:
1013 if (!(msg->header.flags & NGF_RESP))
1014 LEAVE(EINVAL);
1015 switch (msg->header.cmd) {
1016 case NGM_ETHER_GET_ENADDR:
1017 if (msg->header.arglen != ETHER_ADDR_LEN)
1018 LEAVE(EINVAL);
1019 bcopy(msg->data, &privp->eh.ether_shost,
1020 ETHER_ADDR_LEN);
1021 break;
1022 default:
1023 LEAVE(EINVAL);
1024 }
1025 break;
1026 default:
1027 LEAVE(EINVAL);
1028 }
1029
1030 /* Take care of synchronous response, if any. */
1031 quit:
1032 CTR2(KTR_NET, "%20s: returning %d", __func__, error);
1033 NG_RESPOND_MSG(error, node, item, resp);
1034 /* Free the message and return. */
1035 NG_FREE_MSG(msg);
1036 return(error);
1037 }
1038
1039 /*
1040 * Start a client into the first state. A separate function because
1041 * it can be needed if the negotiation times out.
1042 */
1043 static void
1044 pppoe_start(sessp sp)
1045 {
1046 hook_p hook = sp->hook;
1047 node_p node = NG_HOOK_NODE(hook);
1048 priv_p privp = NG_NODE_PRIVATE(node);
1049 negp neg = sp->neg;
1050 struct {
1051 struct pppoe_tag hdr;
1052 union uniq data;
1053 } __packed uniqtag;
1054 struct mbuf *m0;
1055 int error;
1056
1057 /*
1058 * Kick the state machine into starting up.
1059 */
1060 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1061 sp->state = PPPOE_SINIT;
1062 /*
1063 * Reset the packet header to broadcast. Since we are
1064 * in a client mode use configured ethertype.
1065 */
1066 memcpy((void *)&neg->pkt->pkt_header.eh, &privp->eh,
1067 sizeof(struct ether_header));
1068 neg->pkt->pkt_header.ph.code = PADI_CODE;
1069 uniqtag.hdr.tag_type = PTT_HOST_UNIQ;
1070 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data));
1071 uniqtag.data.pointer = sp;
1072 init_tags(sp);
1073 insert_tag(sp, &uniqtag.hdr);
1074 insert_tag(sp, &neg->service.hdr);
1075 make_packet(sp);
1076 /*
1077 * Send packet and prepare to retransmit it after timeout.
1078 */
1079 ng_callout(&neg->handle, node, hook, PPPOE_INITIAL_TIMEOUT * hz,
1080 pppoe_ticker, NULL, 0);
1081 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2;
1082 m0 = m_copypacket(neg->m, M_NOWAIT);
1083 NG_SEND_DATA_ONLY(error, privp->ethernet_hook, m0);
1084 }
1085
1086 static int
1087 send_acname(sessp sp, const struct pppoe_tag *tag)
1088 {
1089 int error, tlen;
1090 struct ng_mesg *msg;
1091 struct ngpppoe_sts *sts;
1092
1093 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1094
1095 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_ACNAME,
1096 sizeof(struct ngpppoe_sts), M_WAITOK | M_NULLOK);
1097 if (msg == NULL)
1098 return (ENOMEM);
1099
1100 sts = (struct ngpppoe_sts *)msg->data;
1101 tlen = min(NG_HOOKSIZ - 1, ntohs(tag->tag_len));
1102 strncpy(sts->hook, tag->tag_data, tlen);
1103 sts->hook[tlen] = '\0';
1104 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1105
1106 return (error);
1107 }
1108
1109 static int
1110 send_sessionid(sessp sp)
1111 {
1112 int error;
1113 struct ng_mesg *msg;
1114
1115 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1116
1117 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_SESSIONID,
1118 sizeof(uint16_t), M_WAITOK | M_NULLOK);
1119 if (msg == NULL)
1120 return (ENOMEM);
1121
1122 *(uint16_t *)msg->data = sp->Session_ID;
1123 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1124
1125 return (error);
1126 }
1127
1128 /*
1129 * Receive data from session hook and do something with it.
1130 */
1131 static int
1132 ng_pppoe_rcvdata(hook_p hook, item_p item)
1133 {
1134 node_p node = NG_HOOK_NODE(hook);
1135 const priv_p privp = NG_NODE_PRIVATE(node);
1136 sessp sp = NG_HOOK_PRIVATE(hook);
1137 struct pppoe_full_hdr *wh;
1138 struct mbuf *m;
1139 int error;
1140
1141 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1142 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1143
1144 NGI_GET_M(item, m);
1145 switch (sp->state) {
1146 case PPPOE_NEWCONNECTED:
1147 case PPPOE_CONNECTED: {
1148 /*
1149 * Remove PPP address and control fields, if any.
1150 * For example, ng_ppp(4) always sends LCP packets
1151 * with address and control fields as required by
1152 * generic PPP. PPPoE is an exception to the rule.
1153 */
1154 if (m->m_pkthdr.len >= 2) {
1155 if (m->m_len < 2 && !(m = m_pullup(m, 2)))
1156 LEAVE(ENOBUFS);
1157 if (mtod(m, u_char *)[0] == 0xff &&
1158 mtod(m, u_char *)[1] == 0x03)
1159 m_adj(m, 2);
1160 }
1161 /*
1162 * Bang in a pre-made header, and set the length up
1163 * to be correct. Then send it to the ethernet driver.
1164 */
1165 M_PREPEND(m, sizeof(*wh), M_NOWAIT);
1166 if (m == NULL)
1167 LEAVE(ENOBUFS);
1168
1169 wh = mtod(m, struct pppoe_full_hdr *);
1170 bcopy(&sp->pkt_hdr, wh, sizeof(*wh));
1171 wh->ph.length = htons(m->m_pkthdr.len - sizeof(*wh));
1172 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m);
1173 privp->packets_out++;
1174 break;
1175 }
1176 case PPPOE_PRIMED: {
1177 struct {
1178 struct pppoe_tag hdr;
1179 union uniq data;
1180 } __packed uniqtag;
1181 const struct pppoe_tag *tag;
1182 struct mbuf *m0;
1183 const struct pppoe_hdr *ph;
1184 negp neg = sp->neg;
1185 uint16_t session;
1186 uint16_t length;
1187 uint8_t code;
1188
1189 /*
1190 * A PADI packet is being returned by the application
1191 * that has set up this hook. This indicates that it
1192 * wants us to offer service.
1193 */
1194 if (m->m_len < sizeof(*wh)) {
1195 m = m_pullup(m, sizeof(*wh));
1196 if (m == NULL)
1197 LEAVE(ENOBUFS);
1198 }
1199 wh = mtod(m, struct pppoe_full_hdr *);
1200 ph = &wh->ph;
1201 session = ntohs(wh->ph.sid);
1202 length = ntohs(wh->ph.length);
1203 code = wh->ph.code;
1204 /* Use peers mode in session. */
1205 neg->pkt->pkt_header.eh.ether_type = wh->eh.ether_type;
1206 if (code != PADI_CODE)
1207 LEAVE(EINVAL);
1208 ng_uncallout(&neg->handle, node);
1209
1210 /*
1211 * This is the first time we hear
1212 * from the client, so note it's
1213 * unicast address, replacing the
1214 * broadcast address.
1215 */
1216 bcopy(wh->eh.ether_shost,
1217 neg->pkt->pkt_header.eh.ether_dhost,
1218 ETHER_ADDR_LEN);
1219 sp->state = PPPOE_SOFFER;
1220 neg->timeout = 0;
1221 neg->pkt->pkt_header.ph.code = PADO_CODE;
1222
1223 /*
1224 * Start working out the tags to respond with.
1225 */
1226 uniqtag.hdr.tag_type = PTT_AC_COOKIE;
1227 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(sp));
1228 uniqtag.data.pointer = sp;
1229 init_tags(sp);
1230 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
1231 if ((tag = get_tag(ph, PTT_SRV_NAME)))
1232 insert_tag(sp, tag); /* return service */
1233 /*
1234 * If we have a NULL service request
1235 * and have an extra service defined in this hook,
1236 * then also add a tag for the extra service.
1237 * XXX this is a hack. eventually we should be able
1238 * to support advertising many services, not just one
1239 */
1240 if (((tag == NULL) || (tag->tag_len == 0)) &&
1241 (neg->service.hdr.tag_len != 0)) {
1242 insert_tag(sp, &neg->service.hdr); /* SERVICE */
1243 }
1244 if ((tag = get_tag(ph, PTT_HOST_UNIQ)))
1245 insert_tag(sp, tag); /* returned hostunique */
1246 insert_tag(sp, &uniqtag.hdr);
1247 scan_tags(sp, ph);
1248 make_packet(sp);
1249 /*
1250 * Send the offer but if they don't respond
1251 * in PPPOE_OFFER_TIMEOUT seconds, forget about it.
1252 */
1253 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz,
1254 pppoe_ticker, NULL, 0);
1255 m0 = m_copypacket(sp->neg->m, M_NOWAIT);
1256 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1257 privp->packets_out++;
1258 break;
1259 }
1260
1261 /*
1262 * Packets coming from the hook make no sense
1263 * to sessions in the rest of states. Throw them away.
1264 */
1265 default:
1266 LEAVE(ENETUNREACH);
1267 }
1268 quit:
1269 if (item)
1270 NG_FREE_ITEM(item);
1271 NG_FREE_M(m);
1272 return (error);
1273 }
1274
1275 /*
1276 * Receive data from ether and do something with it.
1277 */
1278 static int
1279 ng_pppoe_rcvdata_ether(hook_p hook, item_p item)
1280 {
1281 node_p node = NG_HOOK_NODE(hook);
1282 const priv_p privp = NG_NODE_PRIVATE(node);
1283 sessp sp = NG_HOOK_PRIVATE(hook);
1284 const struct pppoe_tag *utag = NULL, *tag = NULL;
1285 const struct pppoe_full_hdr *wh;
1286 const struct pppoe_hdr *ph;
1287 negp neg = NULL;
1288 struct mbuf *m;
1289 hook_p sendhook;
1290 int error = 0;
1291 uint16_t session;
1292 uint16_t length;
1293 uint8_t code;
1294 struct mbuf *m0;
1295
1296 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1297 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1298
1299 NGI_GET_M(item, m);
1300 /*
1301 * Dig out various fields from the packet.
1302 * Use them to decide where to send it.
1303 */
1304 privp->packets_in++;
1305 if( m->m_len < sizeof(*wh)) {
1306 m = m_pullup(m, sizeof(*wh)); /* Checks length */
1307 if (m == NULL) {
1308 log(LOG_NOTICE, "ng_pppoe[%x]: couldn't "
1309 "m_pullup(wh)\n", node->nd_ID);
1310 LEAVE(ENOBUFS);
1311 }
1312 }
1313 wh = mtod(m, struct pppoe_full_hdr *);
1314 length = ntohs(wh->ph.length);
1315 switch(wh->eh.ether_type) {
1316 case ETHERTYPE_PPPOE_3COM_DISC: /* fall through */
1317 case ETHERTYPE_PPPOE_DISC:
1318 /*
1319 * We need to try to make sure that the tag area
1320 * is contiguous, or we could wander off the end
1321 * of a buffer and make a mess.
1322 * (Linux wouldn't have this problem).
1323 */
1324 if (m->m_pkthdr.len <= MHLEN) {
1325 if( m->m_len < m->m_pkthdr.len) {
1326 m = m_pullup(m, m->m_pkthdr.len);
1327 if (m == NULL) {
1328 log(LOG_NOTICE, "ng_pppoe[%x]: "
1329 "couldn't m_pullup(pkthdr)\n",
1330 node->nd_ID);
1331 LEAVE(ENOBUFS);
1332 }
1333 }
1334 }
1335 if (m->m_len != m->m_pkthdr.len) {
1336 /*
1337 * It's not all in one piece.
1338 * We need to do extra work.
1339 * Put it into a cluster.
1340 */
1341 struct mbuf *n;
1342 n = m_dup(m, M_NOWAIT);
1343 m_freem(m);
1344 m = n;
1345 if (m) {
1346 /* just check we got a cluster */
1347 if (m->m_len != m->m_pkthdr.len) {
1348 m_freem(m);
1349 m = NULL;
1350 }
1351 }
1352 if (m == NULL) {
1353 log(LOG_NOTICE, "ng_pppoe[%x]: packet "
1354 "fragmented\n", node->nd_ID);
1355 LEAVE(EMSGSIZE);
1356 }
1357 }
1358 wh = mtod(m, struct pppoe_full_hdr *);
1359 length = ntohs(wh->ph.length);
1360 ph = &wh->ph;
1361 session = ntohs(wh->ph.sid);
1362 code = wh->ph.code;
1363
1364 switch(code) {
1365 case PADI_CODE:
1366 /*
1367 * We are a server:
1368 * Look for a hook with the required service and send
1369 * the ENTIRE packet up there. It should come back to
1370 * a new hook in PRIMED state. Look there for further
1371 * processing.
1372 */
1373 tag = get_tag(ph, PTT_SRV_NAME);
1374 if (tag == NULL) {
1375 CTR1(KTR_NET, "%20s: PADI w/o Service-Name",
1376 __func__);
1377 LEAVE(ENETUNREACH);
1378 }
1379
1380 /*
1381 * First, try to match Service-Name against our
1382 * listening hooks. If no success and we are in D-Link
1383 * compat mode and Service-Name is empty, then we
1384 * broadcast the PADI to all listening hooks.
1385 */
1386 sendhook = pppoe_match_svc(node, tag);
1387 if (sendhook != NULL)
1388 NG_FWD_NEW_DATA(error, item, sendhook, m);
1389 else if (privp->flags & COMPAT_DLINK &&
1390 ntohs(tag->tag_len) == 0)
1391 error = pppoe_broadcast_padi(node, m);
1392 else
1393 error = ENETUNREACH;
1394 break;
1395 case PADO_CODE:
1396 /*
1397 * We are a client:
1398 * Use the host_uniq tag to find the hook this is in
1399 * response to. Received #2, now send #3
1400 * For now simply accept the first we receive.
1401 */
1402 utag = get_tag(ph, PTT_HOST_UNIQ);
1403 if ((utag == NULL) ||
1404 (ntohs(utag->tag_len) != sizeof(sp))) {
1405 log(LOG_NOTICE, "ng_pppoe[%x]: no host "
1406 "unique field\n", node->nd_ID);
1407 LEAVE(ENETUNREACH);
1408 }
1409
1410 sendhook = pppoe_finduniq(node, utag);
1411 if (sendhook == NULL) {
1412 log(LOG_NOTICE, "ng_pppoe[%x]: no "
1413 "matching session\n", node->nd_ID);
1414 LEAVE(ENETUNREACH);
1415 }
1416
1417 /*
1418 * Check the session is in the right state.
1419 * It needs to be in PPPOE_SINIT.
1420 */
1421 sp = NG_HOOK_PRIVATE(sendhook);
1422 if (sp->state == PPPOE_SREQ ||
1423 sp->state == PPPOE_CONNECTED) {
1424 break; /* Multiple PADO is OK. */
1425 }
1426 if (sp->state != PPPOE_SINIT) {
1427 log(LOG_NOTICE, "ng_pppoe[%x]: session "
1428 "in wrong state\n", node->nd_ID);
1429 LEAVE(ENETUNREACH);
1430 }
1431 neg = sp->neg;
1432 /* If requested specific AC-name, check it. */
1433 if (neg->ac_name_len) {
1434 tag = get_tag(ph, PTT_AC_NAME);
1435 if (!tag) {
1436 /* No PTT_AC_NAME in PADO */
1437 break;
1438 }
1439 if (neg->ac_name_len != htons(tag->tag_len) ||
1440 strncmp(neg->ac_name.data, tag->tag_data,
1441 neg->ac_name_len) != 0) {
1442 break;
1443 }
1444 }
1445 sp->state = PPPOE_SREQ;
1446 ng_uncallout(&neg->handle, node);
1447
1448 /*
1449 * This is the first time we hear
1450 * from the server, so note it's
1451 * unicast address, replacing the
1452 * broadcast address .
1453 */
1454 bcopy(wh->eh.ether_shost,
1455 neg->pkt->pkt_header.eh.ether_dhost,
1456 ETHER_ADDR_LEN);
1457 neg->timeout = 0;
1458 neg->pkt->pkt_header.ph.code = PADR_CODE;
1459 init_tags(sp);
1460 insert_tag(sp, utag); /* Host Unique */
1461 if ((tag = get_tag(ph, PTT_AC_COOKIE)))
1462 insert_tag(sp, tag); /* return cookie */
1463 if ((tag = get_tag(ph, PTT_AC_NAME))) {
1464 insert_tag(sp, tag); /* return it */
1465 send_acname(sp, tag);
1466 }
1467 insert_tag(sp, &neg->service.hdr); /* Service */
1468 scan_tags(sp, ph);
1469 make_packet(sp);
1470 sp->state = PPPOE_SREQ;
1471 ng_callout(&neg->handle, node, sp->hook,
1472 PPPOE_INITIAL_TIMEOUT * hz,
1473 pppoe_ticker, NULL, 0);
1474 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2;
1475 m0 = m_copypacket(neg->m, M_NOWAIT);
1476 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1477 break;
1478 case PADR_CODE:
1479 /*
1480 * We are a server:
1481 * Use the ac_cookie tag to find the
1482 * hook this is in response to.
1483 */
1484 utag = get_tag(ph, PTT_AC_COOKIE);
1485 if ((utag == NULL) ||
1486 (ntohs(utag->tag_len) != sizeof(sp))) {
1487 LEAVE(ENETUNREACH);
1488 }
1489
1490 sendhook = pppoe_finduniq(node, utag);
1491 if (sendhook == NULL)
1492 LEAVE(ENETUNREACH);
1493
1494 /*
1495 * Check the session is in the right state.
1496 * It needs to be in PPPOE_SOFFER or PPPOE_NEWCONNECTED.
1497 * If the latter, then this is a retry by the client,
1498 * so be nice, and resend.
1499 */
1500 sp = NG_HOOK_PRIVATE(sendhook);
1501 if (sp->state == PPPOE_NEWCONNECTED) {
1502 /*
1503 * Whoa! drop back to resend that PADS packet.
1504 * We should still have a copy of it.
1505 */
1506 sp->state = PPPOE_SOFFER;
1507 } else if (sp->state != PPPOE_SOFFER)
1508 LEAVE (ENETUNREACH);
1509 neg = sp->neg;
1510 ng_uncallout(&neg->handle, node);
1511 neg->pkt->pkt_header.ph.code = PADS_CODE;
1512 if (sp->Session_ID == 0) {
1513 neg->pkt->pkt_header.ph.sid =
1514 htons(pppoe_getnewsession(sp));
1515 }
1516 send_sessionid(sp);
1517 neg->timeout = 0;
1518 /*
1519 * start working out the tags to respond with.
1520 */
1521 init_tags(sp);
1522 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
1523 if ((tag = get_tag(ph, PTT_SRV_NAME)))
1524 insert_tag(sp, tag);/* return service */
1525 if ((tag = get_tag(ph, PTT_HOST_UNIQ)))
1526 insert_tag(sp, tag); /* return it */
1527 insert_tag(sp, utag); /* ac_cookie */
1528 scan_tags(sp, ph);
1529 make_packet(sp);
1530 sp->state = PPPOE_NEWCONNECTED;
1531
1532 /* Send the PADS without a timeout - we're now connected. */
1533 m0 = m_copypacket(sp->neg->m, M_NOWAIT);
1534 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1535
1536 /*
1537 * Having sent the last Negotiation header,
1538 * Set up the stored packet header to be correct for
1539 * the actual session. But keep the negotialtion stuff
1540 * around in case we need to resend this last packet.
1541 * We'll discard it when we move from NEWCONNECTED
1542 * to CONNECTED
1543 */
1544 sp->pkt_hdr = neg->pkt->pkt_header;
1545 /* Configure ethertype depending on what
1546 * ethertype was used at discovery phase */
1547 if (sp->pkt_hdr.eh.ether_type ==
1548 ETHERTYPE_PPPOE_3COM_DISC)
1549 sp->pkt_hdr.eh.ether_type
1550 = ETHERTYPE_PPPOE_3COM_SESS;
1551 else
1552 sp->pkt_hdr.eh.ether_type
1553 = ETHERTYPE_PPPOE_SESS;
1554 sp->pkt_hdr.ph.code = 0;
1555 pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
1556 break;
1557 case PADS_CODE:
1558 /*
1559 * We are a client:
1560 * Use the host_uniq tag to find the hook this is in
1561 * response to. Take the session ID and store it away.
1562 * Also make sure the pre-made header is correct and
1563 * set us into Session mode.
1564 */
1565 utag = get_tag(ph, PTT_HOST_UNIQ);
1566 if ((utag == NULL) ||
1567 (ntohs(utag->tag_len) != sizeof(sp))) {
1568 LEAVE (ENETUNREACH);
1569 }
1570 sendhook = pppoe_finduniq(node, utag);
1571 if (sendhook == NULL)
1572 LEAVE(ENETUNREACH);
1573
1574 /*
1575 * Check the session is in the right state.
1576 * It needs to be in PPPOE_SREQ.
1577 */
1578 sp = NG_HOOK_PRIVATE(sendhook);
1579 if (sp->state != PPPOE_SREQ)
1580 LEAVE(ENETUNREACH);
1581 neg = sp->neg;
1582 ng_uncallout(&neg->handle, node);
1583 neg->pkt->pkt_header.ph.sid = wh->ph.sid;
1584 sp->Session_ID = ntohs(wh->ph.sid);
1585 pppoe_addsession(sp);
1586 send_sessionid(sp);
1587 neg->timeout = 0;
1588 sp->state = PPPOE_CONNECTED;
1589 /*
1590 * Now we have gone to Connected mode,
1591 * Free all resources needed for negotiation.
1592 * Keep a copy of the header we will be using.
1593 */
1594 sp->pkt_hdr = neg->pkt->pkt_header;
1595 if (privp->flags & COMPAT_3COM)
1596 sp->pkt_hdr.eh.ether_type
1597 = ETHERTYPE_PPPOE_3COM_SESS;
1598 else
1599 sp->pkt_hdr.eh.ether_type
1600 = ETHERTYPE_PPPOE_SESS;
1601 sp->pkt_hdr.ph.code = 0;
1602 m_freem(neg->m);
1603 kfree(sp->neg, M_NETGRAPH_PPPOE);
1604 sp->neg = NULL;
1605 pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
1606 break;
1607 case PADT_CODE:
1608 /*
1609 * Find matching peer/session combination.
1610 */
1611 sp = pppoe_findsession(privp, wh);
1612 if (sp == NULL)
1613 LEAVE(ENETUNREACH);
1614 /* Disconnect that hook. */
1615 ng_rmhook_self(sp->hook);
1616 break;
1617 default:
1618 LEAVE(EPFNOSUPPORT);
1619 }
1620 break;
1621 case ETHERTYPE_PPPOE_3COM_SESS:
1622 case ETHERTYPE_PPPOE_SESS:
1623 /*
1624 * Find matching peer/session combination.
1625 */
1626 sp = pppoe_findsession(privp, wh);
1627 if (sp == NULL)
1628 LEAVE (ENETUNREACH);
1629 m_adj(m, sizeof(*wh));
1630
1631 /* If packet too short, dump it. */
1632 if (m->m_pkthdr.len < length)
1633 LEAVE(EMSGSIZE);
1634 /* Also need to trim excess at the end */
1635 if (m->m_pkthdr.len > length) {
1636 m_adj(m, -((int)(m->m_pkthdr.len - length)));
1637 }
1638 if ( sp->state != PPPOE_CONNECTED) {
1639 if (sp->state == PPPOE_NEWCONNECTED) {
1640 sp->state = PPPOE_CONNECTED;
1641 /*
1642 * Now we have gone to Connected mode,
1643 * Free all resources needed for negotiation.
1644 * Be paranoid about whether there may be
1645 * a timeout.
1646 */
1647 m_freem(sp->neg->m);
1648 ng_uncallout(&sp->neg->handle, node);
1649 kfree(sp->neg, M_NETGRAPH_PPPOE);
1650 sp->neg = NULL;
1651 } else {
1652 LEAVE (ENETUNREACH);
1653 }
1654 }
1655 NG_FWD_NEW_DATA(error, item, sp->hook, m);
1656 break;
1657 default:
1658 LEAVE(EPFNOSUPPORT);
1659 }
1660 quit:
1661 if (item)
1662 NG_FREE_ITEM(item);
1663 NG_FREE_M(m);
1664 return (error);
1665 }
1666
1667 /*
1668 * Receive data from debug hook and bypass it to ether.
1669 */
1670 static int
1671 ng_pppoe_rcvdata_debug(hook_p hook, item_p item)
1672 {
1673 node_p node = NG_HOOK_NODE(hook);
1674 const priv_p privp = NG_NODE_PRIVATE(node);
1675 int error;
1676
1677 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1678 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1679
1680 NG_FWD_ITEM_HOOK(error, item, privp->ethernet_hook);
1681 privp->packets_out++;
1682 return (error);
1683 }
1684
1685 /*
1686 * Do local shutdown processing..
1687 * If we are a persistant device, we might refuse to go away, and
1688 * we'd only remove our links and reset ourself.
1689 */
1690 static int
1691 ng_pppoe_shutdown(node_p node)
1692 {
1693 const priv_p privp = NG_NODE_PRIVATE(node);
1694 int i;
1695
1696 for (i = 0; i < SESSHASHSIZE; i++)
1697 mtx_uninit(&privp->sesshash[i].mtx);
1698 NG_NODE_SET_PRIVATE(node, NULL);
1699 NG_NODE_UNREF(privp->node);
1700 kfree(privp, M_NETGRAPH_PPPOE);
1701 return (0);
1702 }
1703
1704 /*
1705 * Hook disconnection
1706 *
1707 * Clean up all dangling links and information about the session/hook.
1708 * For this type, removal of the last link destroys the node.
1709 */
1710 static int
1711 ng_pppoe_disconnect(hook_p hook)
1712 {
1713 node_p node = NG_HOOK_NODE(hook);
1714 priv_p privp = NG_NODE_PRIVATE(node);
1715 sessp sp;
1716
1717 if (hook == privp->debug_hook) {
1718 privp->debug_hook = NULL;
1719 } else if (hook == privp->ethernet_hook) {
1720 privp->ethernet_hook = NULL;
1721 if (NG_NODE_IS_VALID(node))
1722 ng_rmnode_self(node);
1723 } else {
1724 sp = NG_HOOK_PRIVATE(hook);
1725 if (sp->state != PPPOE_SNONE ) {
1726 pppoe_send_event(sp, NGM_PPPOE_CLOSE);
1727 }
1728 /*
1729 * According to the spec, if we are connected,
1730 * we should send a DISC packet if we are shutting down
1731 * a session.
1732 */
1733 if ((privp->ethernet_hook)
1734 && ((sp->state == PPPOE_CONNECTED)
1735 || (sp->state == PPPOE_NEWCONNECTED))) {
1736 struct mbuf *m;
1737
1738 /* Generate a packet of that type. */
1739 MGETHDR(m, M_NOWAIT, MT_DATA);
1740 if (m == NULL)
1741 log(LOG_NOTICE, "ng_pppoe[%x]: session out of "
1742 "mbufs\n", node->nd_ID);
1743 else {
1744 struct pppoe_full_hdr *wh;
1745 struct pppoe_tag *tag;
1746 int msglen = strlen(SIGNOFF);
1747 int error = 0;
1748
1749 m->m_pkthdr.rcvif = NULL;
1750 m->m_pkthdr.len = m->m_len = sizeof(*wh);
1751 wh = mtod(m, struct pppoe_full_hdr *);
1752 bcopy(&sp->pkt_hdr, wh, sizeof(*wh));
1753
1754 /* Revert the stored header to DISC/PADT mode. */
1755 wh->ph.code = PADT_CODE;
1756 /*
1757 * Configure ethertype depending on what
1758 * was used during sessions stage.
1759 */
1760 if (wh->eh.ether_type ==
1761 ETHERTYPE_PPPOE_3COM_SESS)
1762 wh->eh.ether_type = ETHERTYPE_PPPOE_3COM_DISC;
1763 else
1764 wh->eh.ether_type = ETHERTYPE_PPPOE_DISC;
1765 /*
1766 * Add a General error message and adjust
1767 * sizes.
1768 */
1769 tag = wh->ph.tag;
1770 tag->tag_type = PTT_GEN_ERR;
1771 tag->tag_len = htons((u_int16_t)msglen);
1772 strncpy(tag->tag_data, SIGNOFF, msglen);
1773 m->m_pkthdr.len = (m->m_len += sizeof(*tag) +
1774 msglen);
1775 wh->ph.length = htons(sizeof(*tag) + msglen);
1776 NG_SEND_DATA_ONLY(error,
1777 privp->ethernet_hook, m);
1778 }
1779 }
1780 if (sp->state == PPPOE_LISTENING)
1781 LIST_REMOVE(sp, sessions);
1782 else if (sp->Session_ID)
1783 pppoe_delsession(sp);
1784 /*
1785 * As long as we have somewhere to store the timeout handle,
1786 * we may have a timeout pending.. get rid of it.
1787 */
1788 if (sp->neg) {
1789 ng_uncallout(&sp->neg->handle, node);
1790 if (sp->neg->m)
1791 m_freem(sp->neg->m);
1792 kfree(sp->neg, M_NETGRAPH_PPPOE);
1793 }
1794 kfree(sp, M_NETGRAPH_PPPOE);
1795 NG_HOOK_SET_PRIVATE(hook, NULL);
1796 }
1797 if ((NG_NODE_NUMHOOKS(node) == 0) &&
1798 (NG_NODE_IS_VALID(node)))
1799 ng_rmnode_self(node);
1800 return (0);
1801 }
1802
1803 /*
1804 * Timeouts come here.
1805 */
1806 static void
1807 pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2)
1808 {
1809 priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
1810 sessp sp = NG_HOOK_PRIVATE(hook);
1811 negp neg = sp->neg;
1812 struct mbuf *m0 = NULL;
1813 int error = 0;
1814
1815 CTR6(KTR_NET, "%20s: node [%x] (%p) hook \"%s\" (%p) session %d",
1816 __func__, node->nd_ID, node, hook->hk_name, hook, sp->Session_ID);
1817 switch(sp->state) {
1818 /*
1819 * Resend the last packet, using an exponential backoff.
1820 * After a period of time, stop growing the backoff,
1821 * And either leave it, or revert to the start.
1822 */
1823 case PPPOE_SINIT:
1824 case PPPOE_SREQ:
1825 /* Timeouts on these produce resends. */
1826 m0 = m_copypacket(sp->neg->m, M_NOWAIT);
1827 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0);
1828 ng_callout(&neg->handle, node, hook, neg->timeout * hz,
1829 pppoe_ticker, NULL, 0);
1830 if ((neg->timeout <<= 1) > PPPOE_TIMEOUT_LIMIT) {
1831 if (sp->state == PPPOE_SREQ) {
1832 /* Revert to SINIT mode. */
1833 pppoe_start(sp);
1834 } else {
1835 neg->timeout = PPPOE_TIMEOUT_LIMIT;
1836 }
1837 }
1838 break;
1839 case PPPOE_PRIMED:
1840 case PPPOE_SOFFER:
1841 /* A timeout on these says "give up" */
1842 ng_rmhook_self(hook);
1843 break;
1844 default:
1845 /* Timeouts have no meaning in other states. */
1846 log(LOG_NOTICE, "ng_pppoe[%x]: unexpected timeout\n",
1847 node->nd_ID);
1848 }
1849 }
1850
1851 /*
1852 * Parse an incoming packet to see if any tags should be copied to the
1853 * output packet. Don't do any tags that have been handled in the main
1854 * state machine.
1855 */
1856 static const struct pppoe_tag*
1857 scan_tags(sessp sp, const struct pppoe_hdr* ph)
1858 {
1859 const char *const end = (const char *)next_tag(ph);
1860 const char *ptn;
1861 const struct pppoe_tag *pt = &ph->tag[0];
1862
1863 /*
1864 * Keep processing tags while a tag header will still fit.
1865 */
1866 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1867
1868 while((const char*)(pt + 1) <= end) {
1869 /*
1870 * If the tag data would go past the end of the packet, abort.
1871 */
1872 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len));
1873 if(ptn > end)
1874 return NULL;
1875
1876 switch (pt->tag_type) {
1877 case PTT_RELAY_SID:
1878 insert_tag(sp, pt);
1879 break;
1880 case PTT_EOL:
1881 return NULL;
1882 case PTT_SRV_NAME:
1883 case PTT_AC_NAME:
1884 case PTT_HOST_UNIQ:
1885 case PTT_AC_COOKIE:
1886 case PTT_VENDOR:
1887 case PTT_SRV_ERR:
1888 case PTT_SYS_ERR:
1889 case PTT_GEN_ERR:
1890 break;
1891 }
1892 pt = (const struct pppoe_tag*)ptn;
1893 }
1894 return NULL;
1895 }
1896
1897 static int
1898 pppoe_send_event(sessp sp, enum cmd cmdid)
1899 {
1900 int error;
1901 struct ng_mesg *msg;
1902 struct ngpppoe_sts *sts;
1903
1904 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1905
1906 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, cmdid,
1907 sizeof(struct ngpppoe_sts), M_WAITOK | M_NULLOK);
1908 if (msg == NULL)
1909 return (ENOMEM);
1910 sts = (struct ngpppoe_sts *)msg->data;
1911 strncpy(sts->hook, NG_HOOK_NAME(sp->hook), NG_HOOKSIZ);
1912 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1913 return (error);
1914 }
DragonFly BSD