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kernel - Refactor vnode_free_list, vnode reuse algorithm
[dragonfly.git] / sys / netgraph7 / ng_pppoe.c
blob197cc0f77ebbd1bd9b4b57ba476a2bf31e963e00
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 * $DragonFly: src/sys/netgraph7/ng_pppoe.c,v 1.2 2008/06/26 23:05:35 dillon Exp $
42 * $Whistle: ng_pppoe.c,v 1.10 1999/11/01 09:24:52 julian Exp $
43 */
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/ktr.h>
49 #include <sys/mbuf.h>
50 #include <sys/malloc.h>
51 #include <sys/errno.h>
52 #include <sys/syslog.h>
53 #include <net/ethernet.h>
54
55 #include "ng_message.h"
56 #include "netgraph.h"
57 #include "ng_parse.h"
58 #include "ng_pppoe.h"
59 #include "ng_ether.h"
60
61 #ifdef NG_SEPARATE_MALLOC
62 MALLOC_DEFINE(M_NETGRAPH_PPPOE, "netgraph_pppoe", "netgraph pppoe node");
63 #else
64 #define M_NETGRAPH_PPPOE M_NETGRAPH
65 #endif
66
67 #define SIGNOFF "session closed"
68
69 /*
70 * This section contains the netgraph method declarations for the
71 * pppoe node. These methods define the netgraph pppoe 'type'.
72 */
73
74 static ng_constructor_t ng_pppoe_constructor;
75 static ng_rcvmsg_t ng_pppoe_rcvmsg;
76 static ng_shutdown_t ng_pppoe_shutdown;
77 static ng_newhook_t ng_pppoe_newhook;
78 static ng_connect_t ng_pppoe_connect;
79 static ng_rcvdata_t ng_pppoe_rcvdata;
80 static ng_rcvdata_t ng_pppoe_rcvdata_ether;
81 static ng_rcvdata_t ng_pppoe_rcvdata_debug;
82 static ng_disconnect_t ng_pppoe_disconnect;
83
84 /* Parse type for struct ngpppoe_init_data */
85 static const struct ng_parse_struct_field ngpppoe_init_data_type_fields[]
86 = NG_PPPOE_INIT_DATA_TYPE_INFO;
87 static const struct ng_parse_type ngpppoe_init_data_state_type = {
88 &ng_parse_struct_type,
89 &ngpppoe_init_data_type_fields
90 };
91
92 /* Parse type for struct ngpppoe_sts */
93 static const struct ng_parse_struct_field ng_pppoe_sts_type_fields[]
94 = NG_PPPOE_STS_TYPE_INFO;
95 static const struct ng_parse_type ng_pppoe_sts_state_type = {
96 &ng_parse_struct_type,
97 &ng_pppoe_sts_type_fields
98 };
99
100 /* List of commands and how to convert arguments to/from ASCII */
101 static const struct ng_cmdlist ng_pppoe_cmds[] = {
102 {
103 NGM_PPPOE_COOKIE,
104 NGM_PPPOE_CONNECT,
105 "pppoe_connect",
106 &ngpppoe_init_data_state_type,
107 NULL
108 },
109 {
110 NGM_PPPOE_COOKIE,
111 NGM_PPPOE_LISTEN,
112 "pppoe_listen",
113 &ngpppoe_init_data_state_type,
114 NULL
115 },
116 {
117 NGM_PPPOE_COOKIE,
118 NGM_PPPOE_OFFER,
119 "pppoe_offer",
120 &ngpppoe_init_data_state_type,
121 NULL
122 },
123 {
124 NGM_PPPOE_COOKIE,
125 NGM_PPPOE_SERVICE,
126 "pppoe_service",
127 &ngpppoe_init_data_state_type,
128 NULL
129 },
130 {
131 NGM_PPPOE_COOKIE,
132 NGM_PPPOE_SUCCESS,
133 "pppoe_success",
134 &ng_pppoe_sts_state_type,
135 NULL
136 },
137 {
138 NGM_PPPOE_COOKIE,
139 NGM_PPPOE_FAIL,
140 "pppoe_fail",
141 &ng_pppoe_sts_state_type,
142 NULL
143 },
144 {
145 NGM_PPPOE_COOKIE,
146 NGM_PPPOE_CLOSE,
147 "pppoe_close",
148 &ng_pppoe_sts_state_type,
149 NULL
150 },
151 {
152 NGM_PPPOE_COOKIE,
153 NGM_PPPOE_SETMODE,
154 "pppoe_setmode",
155 &ng_parse_string_type,
156 NULL
157 },
158 {
159 NGM_PPPOE_COOKIE,
160 NGM_PPPOE_GETMODE,
161 "pppoe_getmode",
162 NULL,
163 &ng_parse_string_type
164 },
165 {
166 NGM_PPPOE_COOKIE,
167 NGM_PPPOE_SETENADDR,
168 "setenaddr",
169 &ng_parse_enaddr_type,
170 NULL
171 },
172 { 0 }
173 };
174
175 /* Netgraph node type descriptor */
176 static struct ng_type typestruct = {
177 .version = NG_ABI_VERSION,
178 .name = NG_PPPOE_NODE_TYPE,
179 .constructor = ng_pppoe_constructor,
180 .rcvmsg = ng_pppoe_rcvmsg,
181 .shutdown = ng_pppoe_shutdown,
182 .newhook = ng_pppoe_newhook,
183 .connect = ng_pppoe_connect,
184 .rcvdata = ng_pppoe_rcvdata,
185 .disconnect = ng_pppoe_disconnect,
186 .cmdlist = ng_pppoe_cmds,
187 };
188 NETGRAPH_INIT(pppoe, &typestruct);
189
190 /*
191 * States for the session state machine.
192 * These have no meaning if there is no hook attached yet.
193 */
194 enum state {
195 PPPOE_SNONE=0, /* [both] Initial state */
196 PPPOE_LISTENING, /* [Daemon] Listening for discover initiation pkt */
197 PPPOE_SINIT, /* [Client] Sent discovery initiation */
198 PPPOE_PRIMED, /* [Server] Awaiting PADI from daemon */
199 PPPOE_SOFFER, /* [Server] Sent offer message (got PADI)*/
200 PPPOE_SREQ, /* [Client] Sent a Request */
201 PPPOE_NEWCONNECTED, /* [Server] Connection established, No data received */
202 PPPOE_CONNECTED, /* [Both] Connection established, Data received */
203 PPPOE_DEAD /* [Both] */
204 };
205
206 #define NUMTAGS 20 /* number of tags we are set up to work with */
207
208 /*
209 * Information we store for each hook on each node for negotiating the
210 * session. The mbuf and cluster are freed once negotiation has completed.
211 * The whole negotiation block is then discarded.
212 */
213
214 struct sess_neg {
215 struct mbuf *m; /* holds cluster with last sent packet */
216 union packet *pkt; /* points within the above cluster */
217 struct callout handle; /* see timeout(9) */
218 u_int timeout; /* 0,1,2,4,8,16 etc. seconds */
219 u_int numtags;
220 const struct pppoe_tag *tags[NUMTAGS];
221 u_int service_len;
222 u_int ac_name_len;
223
224 struct datatag service;
225 struct datatag ac_name;
226 };
227 typedef struct sess_neg *negp;
228
229 /*
230 * Session information that is needed after connection.
231 */
232 struct sess_con {
233 hook_p hook;
234 uint16_t Session_ID;
235 enum state state;
236 ng_ID_t creator; /* who to notify */
237 struct pppoe_full_hdr pkt_hdr; /* used when connected */
238 negp neg; /* used when negotiating */
239 LIST_ENTRY(sess_con) sessions;
240 };
241 typedef struct sess_con *sessp;
242
243 #define SESSHASHSIZE 0x0100
244 #define SESSHASH(x) (((x) ^ ((x) >> 8)) & (SESSHASHSIZE - 1))
245
246 struct sess_hash_entry {
247 struct mtx mtx;
248 LIST_HEAD(hhead, sess_con) head;
249 };
250
251 /*
252 * Information we store for each node
253 */
254 struct PPPoE {
255 node_p node; /* back pointer to node */
256 hook_p ethernet_hook;
257 hook_p debug_hook;
258 u_int packets_in; /* packets in from ethernet */
259 u_int packets_out; /* packets out towards ethernet */
260 uint32_t flags;
261 #define COMPAT_3COM 0x00000001
262 #define COMPAT_DLINK 0x00000002
263 struct ether_header eh;
264 LIST_HEAD(, sess_con) listeners;
265 struct sess_hash_entry sesshash[SESSHASHSIZE];
266 };
267 typedef struct PPPoE *priv_p;
268
269 union uniq {
270 char bytes[sizeof(void *)];
271 void *pointer;
272 };
273
274 #define LEAVE(x) do { error = x; goto quit; } while(0)
275 static void pppoe_start(sessp sp);
276 static void pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2);
277 static const struct pppoe_tag *scan_tags(sessp sp,
278 const struct pppoe_hdr* ph);
279 static int pppoe_send_event(sessp sp, enum cmd cmdid);
280
281 /*************************************************************************
282 * Some basic utilities from the Linux version with author's permission.*
283 * Author: Michal Ostrowski <mostrows@styx.uwaterloo.ca> *
284 ************************************************************************/
285
286
287
288 /*
289 * Return the location where the next tag can be put
290 */
291 static __inline const struct pppoe_tag*
292 next_tag(const struct pppoe_hdr* ph)
293 {
294 return (const struct pppoe_tag*)(((const char*)&ph->tag[0])
295 + ntohs(ph->length));
296 }
297
298 /*
299 * Look for a tag of a specific type.
300 * Don't trust any length the other end says,
301 * but assume we already sanity checked ph->length.
302 */
303 static const struct pppoe_tag*
304 get_tag(const struct pppoe_hdr* ph, uint16_t idx)
305 {
306 const char *const end = (const char *)next_tag(ph);
307 const struct pppoe_tag *pt = &ph->tag[0];
308 const char *ptn;
309
310 /*
311 * Keep processing tags while a tag header will still fit.
312 */
313 while((const char*)(pt + 1) <= end) {
314 /*
315 * If the tag data would go past the end of the packet, abort.
316 */
317 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len));
318 if (ptn > end) {
319 CTR2(KTR_NET, "%20s: invalid length for tag %d",
320 __func__, idx);
321 return (NULL);
322 }
323 if (pt->tag_type == idx) {
324 CTR2(KTR_NET, "%20s: found tag %d", __func__, idx);
325 return (pt);
326 }
327
328 pt = (const struct pppoe_tag*)ptn;
329 }
330
331 CTR2(KTR_NET, "%20s: not found tag %d", __func__, idx);
332 return (NULL);
333 }
334
335 /**************************************************************************
336 * Inlines to initialise or add tags to a session's tag list.
337 **************************************************************************/
338 /*
339 * Initialise the session's tag list.
340 */
341 static void
342 init_tags(sessp sp)
343 {
344 KASSERT(sp->neg != NULL, ("%s: no neg", __func__));
345 sp->neg->numtags = 0;
346 }
347
348 static void
349 insert_tag(sessp sp, const struct pppoe_tag *tp)
350 {
351 negp neg = sp->neg;
352 int i;
353
354 KASSERT(neg != NULL, ("%s: no neg", __func__));
355 if ((i = neg->numtags++) < NUMTAGS) {
356 neg->tags[i] = tp;
357 } else {
358 log(LOG_NOTICE, "ng_pppoe: asked to add too many tags to "
359 "packet\n");
360 neg->numtags--;
361 }
362 }
363
364 /*
365 * Make up a packet, using the tags filled out for the session.
366 *
367 * Assume that the actual pppoe header and ethernet header
368 * are filled out externally to this routine.
369 * Also assume that neg->wh points to the correct
370 * location at the front of the buffer space.
371 */
372 static void
373 make_packet(sessp sp) {
374 struct pppoe_full_hdr *wh = &sp->neg->pkt->pkt_header;
375 const struct pppoe_tag **tag;
376 char *dp;
377 int count;
378 int tlen;
379 uint16_t length = 0;
380
381 KASSERT((sp->neg != NULL) && (sp->neg->m != NULL),
382 ("%s: called from wrong state", __func__));
383 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
384
385 dp = (char *)wh->ph.tag;
386 for (count = 0, tag = sp->neg->tags;
387 ((count < sp->neg->numtags) && (count < NUMTAGS));
388 tag++, count++) {
389 tlen = ntohs((*tag)->tag_len) + sizeof(**tag);
390 if ((length + tlen) > (ETHER_MAX_LEN - 4 - sizeof(*wh))) {
391 log(LOG_NOTICE, "ng_pppoe: tags too long\n");
392 sp->neg->numtags = count;
393 break; /* XXX chop off what's too long */
394 }
395 bcopy(*tag, (char *)dp, tlen);
396 length += tlen;
397 dp += tlen;
398 }
399 wh->ph.length = htons(length);
400 sp->neg->m->m_len = length + sizeof(*wh);
401 sp->neg->m->m_pkthdr.len = length + sizeof(*wh);
402 }
403
404 /**************************************************************************
405 * Routines to match a service. *
406 **************************************************************************/
407
408 /*
409 * Find a hook that has a service string that matches that
410 * we are seeking. For now use a simple string.
411 * In the future we may need something like regexp().
412 *
413 * Null string is a wildcard (ANY service), according to RFC2516.
414 * And historical FreeBSD wildcard is also "*".
415 */
416
417 static hook_p
418 pppoe_match_svc(node_p node, const struct pppoe_tag *tag)
419 {
420 const priv_p privp = NG_NODE_PRIVATE(node);
421 sessp sp;
422
423 LIST_FOREACH(sp, &privp->listeners, sessions) {
424 negp neg = sp->neg;
425
426 /* Empty Service-Name matches any service. */
427 if (neg->service_len == 0)
428 break;
429
430 /* Special case for a blank or "*" service name (wildcard). */
431 if (neg->service_len == 1 && neg->service.data[0] == '*')
432 break;
433
434 /* If the lengths don't match, that aint it. */
435 if (neg->service_len != ntohs(tag->tag_len))
436 continue;
437
438 if (strncmp(tag->tag_data, neg->service.data,
439 ntohs(tag->tag_len)) == 0)
440 break;
441 }
442 CTR3(KTR_NET, "%20s: matched %p for %s", __func__,
443 sp?sp->hook:NULL, tag->tag_data);
444
445 return (sp?sp->hook:NULL);
446 }
447
448 /*
449 * Broadcast the PADI packet in m0 to all listening hooks.
450 * This routine is called when a PADI with empty Service-Name
451 * tag is received. Client should receive PADOs with all
452 * available services.
453 */
454 static int
455 pppoe_broadcast_padi(node_p node, struct mbuf *m0)
456 {
457 const priv_p privp = NG_NODE_PRIVATE(node);
458 sessp sp;
459 int error = 0;
460
461 LIST_FOREACH(sp, &privp->listeners, sessions) {
462 struct mbuf *m;
463
464 m = m_dup(m0, MB_DONTWAIT);
465 if (m == NULL)
466 return (ENOMEM);
467 NG_SEND_DATA_ONLY(error, sp->hook, m);
468 if (error)
469 return (error);
470 }
471
472 return (0);
473 }
474
475 /*
476 * Find a hook, which name equals to given service.
477 */
478 static hook_p
479 pppoe_find_svc(node_p node, const char *svc_name, int svc_len)
480 {
481 const priv_p privp = NG_NODE_PRIVATE(node);
482 sessp sp;
483
484 LIST_FOREACH(sp, &privp->listeners, sessions) {
485 negp neg = sp->neg;
486
487 if (neg->service_len == svc_len &&
488 strncmp(svc_name, neg->service.data, svc_len) == 0)
489 return (sp->hook);
490 }
491
492 return (NULL);
493 }
494
495 /**************************************************************************
496 * Routines to find a particular session that matches an incoming packet. *
497 **************************************************************************/
498 /* Find free session and add to hash. */
499 static uint16_t
500 pppoe_getnewsession(sessp sp)
501 {
502 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
503 static uint16_t pppoe_sid = 1;
504 sessp tsp;
505 uint16_t val, hash;
506
507 restart:
508 /* Atomicity is not needed here as value will be checked. */
509 val = pppoe_sid++;
510 /* Spec says 0xFFFF is reserved, also don't use 0x0000. */
511 if (val == 0xffff || val == 0x0000)
512 val = pppoe_sid = 1;
513
514 /* Check it isn't already in use. */
515 hash = SESSHASH(val);
516 mtx_lock(&privp->sesshash[hash].mtx);
517 LIST_FOREACH(tsp, &privp->sesshash[hash].head, sessions) {
518 if (tsp->Session_ID == val)
519 break;
520 }
521 if (!tsp) {
522 sp->Session_ID = val;
523 LIST_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions);
524 }
525 mtx_unlock(&privp->sesshash[hash].mtx);
526 if (tsp)
527 goto restart;
528
529 CTR2(KTR_NET, "%20s: new sid %d", __func__, val);
530
531 return (val);
532 }
533
534 /* Add specified session to hash. */
535 static void
536 pppoe_addsession(sessp sp)
537 {
538 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
539 uint16_t hash = SESSHASH(sp->Session_ID);
540
541 mtx_lock(&privp->sesshash[hash].mtx);
542 LIST_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions);
543 mtx_unlock(&privp->sesshash[hash].mtx);
544 }
545
546 /* Delete specified session from hash. */
547 static void
548 pppoe_delsession(sessp sp)
549 {
550 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
551 uint16_t hash = SESSHASH(sp->Session_ID);
552
553 mtx_lock(&privp->sesshash[hash].mtx);
554 LIST_REMOVE(sp, sessions);
555 mtx_unlock(&privp->sesshash[hash].mtx);
556 }
557
558 /* Find matching peer/session combination. */
559 static sessp
560 pppoe_findsession(priv_p privp, const struct pppoe_full_hdr *wh)
561 {
562 uint16_t session = ntohs(wh->ph.sid);
563 uint16_t hash = SESSHASH(session);
564 sessp sp = NULL;
565
566 mtx_lock(&privp->sesshash[hash].mtx);
567 LIST_FOREACH(sp, &privp->sesshash[hash].head, sessions) {
568 if (sp->Session_ID == session &&
569 bcmp(sp->pkt_hdr.eh.ether_dhost,
570 wh->eh.ether_shost, ETHER_ADDR_LEN) == 0) {
571 break;
572 }
573 }
574 mtx_unlock(&privp->sesshash[hash].mtx);
575 CTR3(KTR_NET, "%20s: matched %p for %d", __func__, sp?sp->hook:NULL,
576 session);
577
578 return (sp);
579 }
580
581 static hook_p
582 pppoe_finduniq(node_p node, const struct pppoe_tag *tag)
583 {
584 hook_p hook = NULL;
585 union uniq uniq;
586
587 bcopy(tag->tag_data, uniq.bytes, sizeof(void *));
588 /* Cycle through all known hooks. */
589 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
590 /* Skip any nonsession hook. */
591 if (NG_HOOK_PRIVATE(hook) == NULL)
592 continue;
593 if (uniq.pointer == NG_HOOK_PRIVATE(hook))
594 break;
595 }
596 CTR3(KTR_NET, "%20s: matched %p for %p", __func__, hook, uniq.pointer);
597
598 return (hook);
599 }
600
601 /**************************************************************************
602 * Start of Netgraph entrypoints. *
603 **************************************************************************/
604
605 /*
606 * Allocate the private data structure and link it with node.
607 */
608 static int
609 ng_pppoe_constructor(node_p node)
610 {
611 priv_p privp;
612 int i;
613
614 /* Initialize private descriptor. */
615 privp = kmalloc(sizeof(*privp), M_NETGRAPH_PPPOE, M_WAITOK | M_NULLOK | M_ZERO);
616 if (privp == NULL)
617 return (ENOMEM);
618
619 /* Link structs together; this counts as our one reference to *node. */
620 NG_NODE_SET_PRIVATE(node, privp);
621 privp->node = node;
622
623 /* Initialize to standard mode. */
624 memset(&privp->eh.ether_dhost, 0xff, ETHER_ADDR_LEN);
625 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
626
627 LIST_INIT(&privp->listeners);
628 for (i = 0; i < SESSHASHSIZE; i++) {
629 mtx_init(&privp->sesshash[i].mtx, "PPPoE hash mutex", NULL, MTX_DEF);
630 LIST_INIT(&privp->sesshash[i].head);
631 }
632
633 CTR3(KTR_NET, "%20s: created node [%x] (%p)",
634 __func__, node->nd_ID, node);
635
636 return (0);
637 }
638
639 /*
640 * Give our ok for a hook to be added...
641 * point the hook's private info to the hook structure.
642 *
643 * The following hook names are special:
644 * "ethernet": the hook that should be connected to a NIC.
645 * "debug": copies of data sent out here (when I write the code).
646 * All other hook names need only be unique. (the framework checks this).
647 */
648 static int
649 ng_pppoe_newhook(node_p node, hook_p hook, const char *name)
650 {
651 const priv_p privp = NG_NODE_PRIVATE(node);
652 sessp sp;
653
654 if (strcmp(name, NG_PPPOE_HOOK_ETHERNET) == 0) {
655 privp->ethernet_hook = hook;
656 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_ether);
657 } else if (strcmp(name, NG_PPPOE_HOOK_DEBUG) == 0) {
658 privp->debug_hook = hook;
659 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_debug);
660 } else {
661 /*
662 * Any other unique name is OK.
663 * The infrastructure has already checked that it's unique,
664 * so just allocate it and hook it in.
665 */
666 sp = kmalloc(sizeof(*sp), M_NETGRAPH_PPPOE, M_WAITOK | M_NULLOK | M_ZERO);
667 if (sp == NULL)
668 return (ENOMEM);
669
670 NG_HOOK_SET_PRIVATE(hook, sp);
671 sp->hook = hook;
672 }
673 CTR5(KTR_NET, "%20s: node [%x] (%p) connected hook %s (%p)",
674 __func__, node->nd_ID, node, name, hook);
675
676 return(0);
677 }
678
679 /*
680 * Hook has been added successfully. Request the MAC address of
681 * the underlying Ethernet node.
682 */
683 static int
684 ng_pppoe_connect(hook_p hook)
685 {
686 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
687 struct ng_mesg *msg;
688 int error;
689
690 if (hook != privp->ethernet_hook)
691 return (0);
692
693 /*
694 * If this is Ethernet hook, then request MAC address
695 * from our downstream.
696 */
697 NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_ENADDR, 0, M_WAITOK | M_NULLOK);
698 if (msg == NULL)
699 return (ENOBUFS);
700
701 /*
702 * Our hook and peer hook have HK_INVALID flag set,
703 * so we can't use NG_SEND_MSG_HOOK() macro here.
704 */
705 NG_SEND_MSG_ID(error, privp->node, msg,
706 NG_NODE_ID(NG_PEER_NODE(privp->ethernet_hook)),
707 NG_NODE_ID(privp->node));
708
709 return (error);
710 }
711 /*
712 * Get a netgraph control message.
713 * Check it is one we understand. If needed, send a response.
714 * We sometimes save the address for an async action later.
715 * Always free the message.
716 */
717 static int
718 ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
719 {
720 priv_p privp = NG_NODE_PRIVATE(node);
721 struct ngpppoe_init_data *ourmsg = NULL;
722 struct ng_mesg *resp = NULL;
723 int error = 0;
724 hook_p hook = NULL;
725 sessp sp = NULL;
726 negp neg = NULL;
727 struct ng_mesg *msg;
728
729 NGI_GET_MSG(item, msg);
730 CTR5(KTR_NET, "%20s: node [%x] (%p) got message %d with cookie %d",
731 __func__, node->nd_ID, node, msg->header.cmd,
732 msg->header.typecookie);
733
734 /* Deal with message according to cookie and command. */
735 switch (msg->header.typecookie) {
736 case NGM_PPPOE_COOKIE:
737 switch (msg->header.cmd) {
738 case NGM_PPPOE_CONNECT:
739 case NGM_PPPOE_LISTEN:
740 case NGM_PPPOE_OFFER:
741 case NGM_PPPOE_SERVICE:
742 ourmsg = (struct ngpppoe_init_data *)msg->data;
743 if (msg->header.arglen < sizeof(*ourmsg)) {
744 log(LOG_ERR, "ng_pppoe[%x]: init data too "
745 "small\n", node->nd_ID);
746 LEAVE(EMSGSIZE);
747 }
748 if (msg->header.arglen - sizeof(*ourmsg) >
749 PPPOE_SERVICE_NAME_SIZE) {
750 log(LOG_ERR, "ng_pppoe[%x]: service name "
751 "too big\n", node->nd_ID);
752 LEAVE(EMSGSIZE);
753 }
754 if (msg->header.arglen - sizeof(*ourmsg) <
755 ourmsg->data_len) {
756 log(LOG_ERR, "ng_pppoe[%x]: init data has bad "
757 "length, %d should be %zd\n", node->nd_ID,
758 ourmsg->data_len,
759 msg->header.arglen - sizeof (*ourmsg));
760 LEAVE(EMSGSIZE);
761 }
762
763 /* Make sure strcmp will terminate safely. */
764 ourmsg->hook[sizeof(ourmsg->hook) - 1] = '\0';
765
766 /* Find hook by name. */
767 hook = ng_findhook(node, ourmsg->hook);
768 if (hook == NULL)
769 LEAVE(ENOENT);
770
771 sp = NG_HOOK_PRIVATE(hook);
772 if (sp == NULL)
773 LEAVE(EINVAL);
774
775 if (msg->header.cmd == NGM_PPPOE_LISTEN) {
776 /*
777 * Ensure we aren't already listening for this
778 * service.
779 */
780 if (pppoe_find_svc(node, ourmsg->data,
781 ourmsg->data_len) != NULL)
782 LEAVE(EEXIST);
783 }
784
785 /*
786 * PPPOE_SERVICE advertisments are set up
787 * on sessions that are in PRIMED state.
788 */
789 if (msg->header.cmd == NGM_PPPOE_SERVICE)
790 break;
791
792 if (sp->state != PPPOE_SNONE) {
793 log(LOG_NOTICE, "ng_pppoe[%x]: Session already "
794 "active\n", node->nd_ID);
795 LEAVE(EISCONN);
796 }
797
798 /*
799 * Set up prototype header.
800 */
801 neg = kmalloc(sizeof(*neg), M_NETGRAPH_PPPOE,
802 M_WAITOK | M_NULLOK | M_ZERO);
803
804 if (neg == NULL)
805 LEAVE(ENOMEM);
806
807 neg->m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
808 if (neg->m == NULL) {
809 kfree(neg, M_NETGRAPH_PPPOE);
810 LEAVE(ENOBUFS);
811 }
812 neg->m->m_pkthdr.rcvif = NULL;
813 sp->neg = neg;
814 ng_callout_init(&neg->handle);
815 neg->m->m_len = sizeof(struct pppoe_full_hdr);
816 neg->pkt = mtod(neg->m, union packet*);
817 memcpy((void *)&neg->pkt->pkt_header.eh,
818 &privp->eh, sizeof(struct ether_header));
819 neg->pkt->pkt_header.ph.ver = 0x1;
820 neg->pkt->pkt_header.ph.type = 0x1;
821 neg->pkt->pkt_header.ph.sid = 0x0000;
822 neg->timeout = 0;
823
824 sp->creator = NGI_RETADDR(item);
825 }
826 switch (msg->header.cmd) {
827 case NGM_PPPOE_GET_STATUS:
828 {
829 struct ngpppoestat *stats;
830
831 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_WAITOK | M_NULLOK);
832 if (!resp)
833 LEAVE(ENOMEM);
834
835 stats = (struct ngpppoestat *) resp->data;
836 stats->packets_in = privp->packets_in;
837 stats->packets_out = privp->packets_out;
838 break;
839 }
840 case NGM_PPPOE_CONNECT:
841 {
842 /*
843 * Check the hook exists and is Uninitialised.
844 * Send a PADI request, and start the timeout logic.
845 * Store the originator of this message so we can send
846 * a success of fail message to them later.
847 * Move the session to SINIT.
848 * Set up the session to the correct state and
849 * start it.
850 */
851 int i, acnlen = 0, acnsep = 0, srvlen;
852 for (i = 0; i < ourmsg->data_len; i++) {
853 if (ourmsg->data[i] == '\\') {
854 acnlen = i;
855 acnsep = 1;
856 break;
857 }
858 }
859 srvlen = ourmsg->data_len - acnlen - acnsep;
860
861 bcopy(ourmsg->data, neg->ac_name.data, acnlen);
862 neg->ac_name_len = acnlen;
863
864 neg->service.hdr.tag_type = PTT_SRV_NAME;
865 neg->service.hdr.tag_len = htons((uint16_t)srvlen);
866 bcopy(ourmsg->data + acnlen + acnsep,
867 neg->service.data, srvlen);
868 neg->service_len = srvlen;
869 pppoe_start(sp);
870 break;
871 }
872 case NGM_PPPOE_LISTEN:
873 /*
874 * Check the hook exists and is Uninitialised.
875 * Install the service matching string.
876 * Store the originator of this message so we can send
877 * a success of fail message to them later.
878 * Move the hook to 'LISTENING'
879 */
880 neg->service.hdr.tag_type = PTT_SRV_NAME;
881 neg->service.hdr.tag_len =
882 htons((uint16_t)ourmsg->data_len);
883
884 if (ourmsg->data_len)
885 bcopy(ourmsg->data, neg->service.data,
886 ourmsg->data_len);
887 neg->service_len = ourmsg->data_len;
888 neg->pkt->pkt_header.ph.code = PADT_CODE;
889 /*
890 * Wait for PADI packet coming from Ethernet.
891 */
892 sp->state = PPPOE_LISTENING;
893 LIST_INSERT_HEAD(&privp->listeners, sp, sessions);
894 break;
895 case NGM_PPPOE_OFFER:
896 /*
897 * Check the hook exists and is Uninitialised.
898 * Store the originator of this message so we can send
899 * a success of fail message to them later.
900 * Store the AC-Name given and go to PRIMED.
901 */
902 neg->ac_name.hdr.tag_type = PTT_AC_NAME;
903 neg->ac_name.hdr.tag_len =
904 htons((uint16_t)ourmsg->data_len);
905 if (ourmsg->data_len)
906 bcopy(ourmsg->data, neg->ac_name.data,
907 ourmsg->data_len);
908 neg->ac_name_len = ourmsg->data_len;
909 neg->pkt->pkt_header.ph.code = PADO_CODE;
910 /*
911 * Wait for PADI packet coming from hook.
912 */
913 sp->state = PPPOE_PRIMED;
914 break;
915 case NGM_PPPOE_SERVICE:
916 /*
917 * Check the session is primed.
918 * for now just allow ONE service to be advertised.
919 * If you do it twice you just overwrite.
920 */
921 if (sp->state != PPPOE_PRIMED) {
922 log(LOG_NOTICE, "ng_pppoe[%x]: session not "
923 "primed\n", node->nd_ID);
924 LEAVE(EISCONN);
925 }
926 neg = sp->neg;
927 neg->service.hdr.tag_type = PTT_SRV_NAME;
928 neg->service.hdr.tag_len =
929 htons((uint16_t)ourmsg->data_len);
930
931 if (ourmsg->data_len)
932 bcopy(ourmsg->data, neg->service.data,
933 ourmsg->data_len);
934 neg->service_len = ourmsg->data_len;
935 break;
936 case NGM_PPPOE_SETMODE:
937 {
938 char *s;
939 size_t len;
940
941 if (msg->header.arglen == 0)
942 LEAVE(EINVAL);
943
944 s = (char *)msg->data;
945 len = msg->header.arglen - 1;
946
947 /* Search for matching mode string. */
948 if (len == strlen(NG_PPPOE_STANDARD) &&
949 (strncmp(NG_PPPOE_STANDARD, s, len) == 0)) {
950 privp->flags = 0;
951 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
952 break;
953 }
954 if (len == strlen(NG_PPPOE_3COM) &&
955 (strncmp(NG_PPPOE_3COM, s, len) == 0)) {
956 privp->flags |= COMPAT_3COM;
957 privp->eh.ether_type =
958 ETHERTYPE_PPPOE_3COM_DISC;
959 break;
960 }
961 if (len == strlen(NG_PPPOE_DLINK) &&
962 (strncmp(NG_PPPOE_DLINK, s, len) == 0)) {
963 privp->flags |= COMPAT_DLINK;
964 break;
965 }
966 error = EINVAL;
967 break;
968 }
969 case NGM_PPPOE_GETMODE:
970 {
971 char *s;
972 size_t len = 0;
973
974 if (privp->flags == 0)
975 len += strlen(NG_PPPOE_STANDARD) + 1;
976 if (privp->flags & COMPAT_3COM)
977 len += strlen(NG_PPPOE_3COM) + 1;
978 if (privp->flags & COMPAT_DLINK)
979 len += strlen(NG_PPPOE_DLINK) + 1;
980
981 NG_MKRESPONSE(resp, msg, len, M_WAITOK | M_NULLOK);
982 if (resp == NULL)
983 LEAVE(ENOMEM);
984
985 s = (char *)resp->data;
986 if (privp->flags == 0) {
987 len = strlen(NG_PPPOE_STANDARD);
988 strlcpy(s, NG_PPPOE_STANDARD, len + 1);
989 break;
990 }
991 if (privp->flags & COMPAT_3COM) {
992 len = strlen(NG_PPPOE_3COM);
993 strlcpy(s, NG_PPPOE_3COM, len + 1);
994 s += len;
995 }
996 if (privp->flags & COMPAT_DLINK) {
997 if (s != resp->data)
998 *s++ = '|';
999 len = strlen(NG_PPPOE_DLINK);
1000 strlcpy(s, NG_PPPOE_DLINK, len + 1);
1001 }
1002 break;
1003 }
1004 case NGM_PPPOE_SETENADDR:
1005 if (msg->header.arglen != ETHER_ADDR_LEN)
1006 LEAVE(EINVAL);
1007 bcopy(msg->data, &privp->eh.ether_shost,
1008 ETHER_ADDR_LEN);
1009 break;
1010 default:
1011 LEAVE(EINVAL);
1012 }
1013 break;
1014 case NGM_ETHER_COOKIE:
1015 if (!(msg->header.flags & NGF_RESP))
1016 LEAVE(EINVAL);
1017 switch (msg->header.cmd) {
1018 case NGM_ETHER_GET_ENADDR:
1019 if (msg->header.arglen != ETHER_ADDR_LEN)
1020 LEAVE(EINVAL);
1021 bcopy(msg->data, &privp->eh.ether_shost,
1022 ETHER_ADDR_LEN);
1023 break;
1024 default:
1025 LEAVE(EINVAL);
1026 }
1027 break;
1028 default:
1029 LEAVE(EINVAL);
1030 }
1031
1032 /* Take care of synchronous response, if any. */
1033 quit:
1034 CTR2(KTR_NET, "%20s: returning %d", __func__, error);
1035 NG_RESPOND_MSG(error, node, item, resp);
1036 /* Free the message and return. */
1037 NG_FREE_MSG(msg);
1038 return(error);
1039 }
1040
1041 /*
1042 * Start a client into the first state. A separate function because
1043 * it can be needed if the negotiation times out.
1044 */
1045 static void
1046 pppoe_start(sessp sp)
1047 {
1048 hook_p hook = sp->hook;
1049 node_p node = NG_HOOK_NODE(hook);
1050 priv_p privp = NG_NODE_PRIVATE(node);
1051 negp neg = sp->neg;
1052 struct {
1053 struct pppoe_tag hdr;
1054 union uniq data;
1055 } __packed uniqtag;
1056 struct mbuf *m0;
1057 int error;
1058
1059 /*
1060 * Kick the state machine into starting up.
1061 */
1062 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1063 sp->state = PPPOE_SINIT;
1064 /*
1065 * Reset the packet header to broadcast. Since we are
1066 * in a client mode use configured ethertype.
1067 */
1068 memcpy((void *)&neg->pkt->pkt_header.eh, &privp->eh,
1069 sizeof(struct ether_header));
1070 neg->pkt->pkt_header.ph.code = PADI_CODE;
1071 uniqtag.hdr.tag_type = PTT_HOST_UNIQ;
1072 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data));
1073 uniqtag.data.pointer = sp;
1074 init_tags(sp);
1075 insert_tag(sp, &uniqtag.hdr);
1076 insert_tag(sp, &neg->service.hdr);
1077 make_packet(sp);
1078 /*
1079 * Send packet and prepare to retransmit it after timeout.
1080 */
1081 ng_callout(&neg->handle, node, hook, PPPOE_INITIAL_TIMEOUT * hz,
1082 pppoe_ticker, NULL, 0);
1083 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2;
1084 m0 = m_copypacket(neg->m, MB_DONTWAIT);
1085 NG_SEND_DATA_ONLY(error, privp->ethernet_hook, m0);
1086 }
1087
1088 static int
1089 send_acname(sessp sp, const struct pppoe_tag *tag)
1090 {
1091 int error, tlen;
1092 struct ng_mesg *msg;
1093 struct ngpppoe_sts *sts;
1094
1095 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1096
1097 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_ACNAME,
1098 sizeof(struct ngpppoe_sts), M_WAITOK | M_NULLOK);
1099 if (msg == NULL)
1100 return (ENOMEM);
1101
1102 sts = (struct ngpppoe_sts *)msg->data;
1103 tlen = min(NG_HOOKSIZ - 1, ntohs(tag->tag_len));
1104 strncpy(sts->hook, tag->tag_data, tlen);
1105 sts->hook[tlen] = '\0';
1106 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1107
1108 return (error);
1109 }
1110
1111 static int
1112 send_sessionid(sessp sp)
1113 {
1114 int error;
1115 struct ng_mesg *msg;
1116
1117 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1118
1119 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_SESSIONID,
1120 sizeof(uint16_t), M_WAITOK | M_NULLOK);
1121 if (msg == NULL)
1122 return (ENOMEM);
1123
1124 *(uint16_t *)msg->data = sp->Session_ID;
1125 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1126
1127 return (error);
1128 }
1129
1130 /*
1131 * Receive data from session hook and do something with it.
1132 */
1133 static int
1134 ng_pppoe_rcvdata(hook_p hook, item_p item)
1135 {
1136 node_p node = NG_HOOK_NODE(hook);
1137 const priv_p privp = NG_NODE_PRIVATE(node);
1138 sessp sp = NG_HOOK_PRIVATE(hook);
1139 struct pppoe_full_hdr *wh;
1140 struct mbuf *m;
1141 int error;
1142
1143 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1144 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1145
1146 NGI_GET_M(item, m);
1147 switch (sp->state) {
1148 case PPPOE_NEWCONNECTED:
1149 case PPPOE_CONNECTED: {
1150 /*
1151 * Remove PPP address and control fields, if any.
1152 * For example, ng_ppp(4) always sends LCP packets
1153 * with address and control fields as required by
1154 * generic PPP. PPPoE is an exception to the rule.
1155 */
1156 if (m->m_pkthdr.len >= 2) {
1157 if (m->m_len < 2 && !(m = m_pullup(m, 2)))
1158 LEAVE(ENOBUFS);
1159 if (mtod(m, u_char *)[0] == 0xff &&
1160 mtod(m, u_char *)[1] == 0x03)
1161 m_adj(m, 2);
1162 }
1163 /*
1164 * Bang in a pre-made header, and set the length up
1165 * to be correct. Then send it to the ethernet driver.
1166 */
1167 M_PREPEND(m, sizeof(*wh), MB_DONTWAIT);
1168 if (m == NULL)
1169 LEAVE(ENOBUFS);
1170
1171 wh = mtod(m, struct pppoe_full_hdr *);
1172 bcopy(&sp->pkt_hdr, wh, sizeof(*wh));
1173 wh->ph.length = htons(m->m_pkthdr.len - sizeof(*wh));
1174 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m);
1175 privp->packets_out++;
1176 break;
1177 }
1178 case PPPOE_PRIMED: {
1179 struct {
1180 struct pppoe_tag hdr;
1181 union uniq data;
1182 } __packed uniqtag;
1183 const struct pppoe_tag *tag;
1184 struct mbuf *m0;
1185 const struct pppoe_hdr *ph;
1186 negp neg = sp->neg;
1187 uint16_t session;
1188 uint16_t length;
1189 uint8_t code;
1190
1191 /*
1192 * A PADI packet is being returned by the application
1193 * that has set up this hook. This indicates that it
1194 * wants us to offer service.
1195 */
1196 if (m->m_len < sizeof(*wh)) {
1197 m = m_pullup(m, sizeof(*wh));
1198 if (m == NULL)
1199 LEAVE(ENOBUFS);
1200 }
1201 wh = mtod(m, struct pppoe_full_hdr *);
1202 ph = &wh->ph;
1203 session = ntohs(wh->ph.sid);
1204 length = ntohs(wh->ph.length);
1205 code = wh->ph.code;
1206 /* Use peers mode in session. */
1207 neg->pkt->pkt_header.eh.ether_type = wh->eh.ether_type;
1208 if (code != PADI_CODE)
1209 LEAVE(EINVAL);
1210 ng_uncallout(&neg->handle, node);
1211
1212 /*
1213 * This is the first time we hear
1214 * from the client, so note it's
1215 * unicast address, replacing the
1216 * broadcast address.
1217 */
1218 bcopy(wh->eh.ether_shost,
1219 neg->pkt->pkt_header.eh.ether_dhost,
1220 ETHER_ADDR_LEN);
1221 sp->state = PPPOE_SOFFER;
1222 neg->timeout = 0;
1223 neg->pkt->pkt_header.ph.code = PADO_CODE;
1224
1225 /*
1226 * Start working out the tags to respond with.
1227 */
1228 uniqtag.hdr.tag_type = PTT_AC_COOKIE;
1229 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(sp));
1230 uniqtag.data.pointer = sp;
1231 init_tags(sp);
1232 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
1233 if ((tag = get_tag(ph, PTT_SRV_NAME)))
1234 insert_tag(sp, tag); /* return service */
1235 /*
1236 * If we have a NULL service request
1237 * and have an extra service defined in this hook,
1238 * then also add a tag for the extra service.
1239 * XXX this is a hack. eventually we should be able
1240 * to support advertising many services, not just one
1241 */
1242 if (((tag == NULL) || (tag->tag_len == 0)) &&
1243 (neg->service.hdr.tag_len != 0)) {
1244 insert_tag(sp, &neg->service.hdr); /* SERVICE */
1245 }
1246 if ((tag = get_tag(ph, PTT_HOST_UNIQ)))
1247 insert_tag(sp, tag); /* returned hostunique */
1248 insert_tag(sp, &uniqtag.hdr);
1249 scan_tags(sp, ph);
1250 make_packet(sp);
1251 /*
1252 * Send the offer but if they don't respond
1253 * in PPPOE_OFFER_TIMEOUT seconds, forget about it.
1254 */
1255 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz,
1256 pppoe_ticker, NULL, 0);
1257 m0 = m_copypacket(sp->neg->m, MB_DONTWAIT);
1258 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1259 privp->packets_out++;
1260 break;
1261 }
1262
1263 /*
1264 * Packets coming from the hook make no sense
1265 * to sessions in the rest of states. Throw them away.
1266 */
1267 default:
1268 LEAVE(ENETUNREACH);
1269 }
1270 quit:
1271 if (item)
1272 NG_FREE_ITEM(item);
1273 NG_FREE_M(m);
1274 return (error);
1275 }
1276
1277 /*
1278 * Receive data from ether and do something with it.
1279 */
1280 static int
1281 ng_pppoe_rcvdata_ether(hook_p hook, item_p item)
1282 {
1283 node_p node = NG_HOOK_NODE(hook);
1284 const priv_p privp = NG_NODE_PRIVATE(node);
1285 sessp sp = NG_HOOK_PRIVATE(hook);
1286 const struct pppoe_tag *utag = NULL, *tag = NULL;
1287 const struct pppoe_full_hdr *wh;
1288 const struct pppoe_hdr *ph;
1289 negp neg = NULL;
1290 struct mbuf *m;
1291 hook_p sendhook;
1292 int error = 0;
1293 uint16_t session;
1294 uint16_t length;
1295 uint8_t code;
1296 struct mbuf *m0;
1297
1298 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1299 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1300
1301 NGI_GET_M(item, m);
1302 /*
1303 * Dig out various fields from the packet.
1304 * Use them to decide where to send it.
1305 */
1306 privp->packets_in++;
1307 if( m->m_len < sizeof(*wh)) {
1308 m = m_pullup(m, sizeof(*wh)); /* Checks length */
1309 if (m == NULL) {
1310 log(LOG_NOTICE, "ng_pppoe[%x]: couldn't "
1311 "m_pullup(wh)\n", node->nd_ID);
1312 LEAVE(ENOBUFS);
1313 }
1314 }
1315 wh = mtod(m, struct pppoe_full_hdr *);
1316 length = ntohs(wh->ph.length);
1317 switch(wh->eh.ether_type) {
1318 case ETHERTYPE_PPPOE_3COM_DISC: /* fall through */
1319 case ETHERTYPE_PPPOE_DISC:
1320 /*
1321 * We need to try to make sure that the tag area
1322 * is contiguous, or we could wander off the end
1323 * of a buffer and make a mess.
1324 * (Linux wouldn't have this problem).
1325 */
1326 if (m->m_pkthdr.len <= MHLEN) {
1327 if( m->m_len < m->m_pkthdr.len) {
1328 m = m_pullup(m, m->m_pkthdr.len);
1329 if (m == NULL) {
1330 log(LOG_NOTICE, "ng_pppoe[%x]: "
1331 "couldn't m_pullup(pkthdr)\n",
1332 node->nd_ID);
1333 LEAVE(ENOBUFS);
1334 }
1335 }
1336 }
1337 if (m->m_len != m->m_pkthdr.len) {
1338 /*
1339 * It's not all in one piece.
1340 * We need to do extra work.
1341 * Put it into a cluster.
1342 */
1343 struct mbuf *n;
1344 n = m_dup(m, MB_DONTWAIT);
1345 m_freem(m);
1346 m = n;
1347 if (m) {
1348 /* just check we got a cluster */
1349 if (m->m_len != m->m_pkthdr.len) {
1350 m_freem(m);
1351 m = NULL;
1352 }
1353 }
1354 if (m == NULL) {
1355 log(LOG_NOTICE, "ng_pppoe[%x]: packet "
1356 "fragmented\n", node->nd_ID);
1357 LEAVE(EMSGSIZE);
1358 }
1359 }
1360 wh = mtod(m, struct pppoe_full_hdr *);
1361 length = ntohs(wh->ph.length);
1362 ph = &wh->ph;
1363 session = ntohs(wh->ph.sid);
1364 code = wh->ph.code;
1365
1366 switch(code) {
1367 case PADI_CODE:
1368 /*
1369 * We are a server:
1370 * Look for a hook with the required service and send
1371 * the ENTIRE packet up there. It should come back to
1372 * a new hook in PRIMED state. Look there for further
1373 * processing.
1374 */
1375 tag = get_tag(ph, PTT_SRV_NAME);
1376 if (tag == NULL) {
1377 CTR1(KTR_NET, "%20s: PADI w/o Service-Name",
1378 __func__);
1379 LEAVE(ENETUNREACH);
1380 }
1381
1382 /*
1383 * First, try to match Service-Name against our
1384 * listening hooks. If no success and we are in D-Link
1385 * compat mode and Service-Name is empty, then we
1386 * broadcast the PADI to all listening hooks.
1387 */
1388 sendhook = pppoe_match_svc(node, tag);
1389 if (sendhook != NULL)
1390 NG_FWD_NEW_DATA(error, item, sendhook, m);
1391 else if (privp->flags & COMPAT_DLINK &&
1392 ntohs(tag->tag_len) == 0)
1393 error = pppoe_broadcast_padi(node, m);
1394 else
1395 error = ENETUNREACH;
1396 break;
1397 case PADO_CODE:
1398 /*
1399 * We are a client:
1400 * Use the host_uniq tag to find the hook this is in
1401 * response to. Received #2, now send #3
1402 * For now simply accept the first we receive.
1403 */
1404 utag = get_tag(ph, PTT_HOST_UNIQ);
1405 if ((utag == NULL) ||
1406 (ntohs(utag->tag_len) != sizeof(sp))) {
1407 log(LOG_NOTICE, "ng_pppoe[%x]: no host "
1408 "unique field\n", node->nd_ID);
1409 LEAVE(ENETUNREACH);
1410 }
1411
1412 sendhook = pppoe_finduniq(node, utag);
1413 if (sendhook == NULL) {
1414 log(LOG_NOTICE, "ng_pppoe[%x]: no "
1415 "matching session\n", node->nd_ID);
1416 LEAVE(ENETUNREACH);
1417 }
1418
1419 /*
1420 * Check the session is in the right state.
1421 * It needs to be in PPPOE_SINIT.
1422 */
1423 sp = NG_HOOK_PRIVATE(sendhook);
1424 if (sp->state == PPPOE_SREQ ||
1425 sp->state == PPPOE_CONNECTED) {
1426 break; /* Multiple PADO is OK. */
1427 }
1428 if (sp->state != PPPOE_SINIT) {
1429 log(LOG_NOTICE, "ng_pppoe[%x]: session "
1430 "in wrong state\n", node->nd_ID);
1431 LEAVE(ENETUNREACH);
1432 }
1433 neg = sp->neg;
1434 /* If requested specific AC-name, check it. */
1435 if (neg->ac_name_len) {
1436 tag = get_tag(ph, PTT_AC_NAME);
1437 if (!tag) {
1438 /* No PTT_AC_NAME in PADO */
1439 break;
1440 }
1441 if (neg->ac_name_len != htons(tag->tag_len) ||
1442 strncmp(neg->ac_name.data, tag->tag_data,
1443 neg->ac_name_len) != 0) {
1444 break;
1445 }
1446 }
1447 sp->state = PPPOE_SREQ;
1448 ng_uncallout(&neg->handle, node);
1449
1450 /*
1451 * This is the first time we hear
1452 * from the server, so note it's
1453 * unicast address, replacing the
1454 * broadcast address .
1455 */
1456 bcopy(wh->eh.ether_shost,
1457 neg->pkt->pkt_header.eh.ether_dhost,
1458 ETHER_ADDR_LEN);
1459 neg->timeout = 0;
1460 neg->pkt->pkt_header.ph.code = PADR_CODE;
1461 init_tags(sp);
1462 insert_tag(sp, utag); /* Host Unique */
1463 if ((tag = get_tag(ph, PTT_AC_COOKIE)))
1464 insert_tag(sp, tag); /* return cookie */
1465 if ((tag = get_tag(ph, PTT_AC_NAME))) {
1466 insert_tag(sp, tag); /* return it */
1467 send_acname(sp, tag);
1468 }
1469 insert_tag(sp, &neg->service.hdr); /* Service */
1470 scan_tags(sp, ph);
1471 make_packet(sp);
1472 sp->state = PPPOE_SREQ;
1473 ng_callout(&neg->handle, node, sp->hook,
1474 PPPOE_INITIAL_TIMEOUT * hz,
1475 pppoe_ticker, NULL, 0);
1476 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2;
1477 m0 = m_copypacket(neg->m, MB_DONTWAIT);
1478 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1479 break;
1480 case PADR_CODE:
1481 /*
1482 * We are a server:
1483 * Use the ac_cookie tag to find the
1484 * hook this is in response to.
1485 */
1486 utag = get_tag(ph, PTT_AC_COOKIE);
1487 if ((utag == NULL) ||
1488 (ntohs(utag->tag_len) != sizeof(sp))) {
1489 LEAVE(ENETUNREACH);
1490 }
1491
1492 sendhook = pppoe_finduniq(node, utag);
1493 if (sendhook == NULL)
1494 LEAVE(ENETUNREACH);
1495
1496 /*
1497 * Check the session is in the right state.
1498 * It needs to be in PPPOE_SOFFER or PPPOE_NEWCONNECTED.
1499 * If the latter, then this is a retry by the client,
1500 * so be nice, and resend.
1501 */
1502 sp = NG_HOOK_PRIVATE(sendhook);
1503 if (sp->state == PPPOE_NEWCONNECTED) {
1504 /*
1505 * Whoa! drop back to resend that PADS packet.
1506 * We should still have a copy of it.
1507 */
1508 sp->state = PPPOE_SOFFER;
1509 } else if (sp->state != PPPOE_SOFFER)
1510 LEAVE (ENETUNREACH);
1511 neg = sp->neg;
1512 ng_uncallout(&neg->handle, node);
1513 neg->pkt->pkt_header.ph.code = PADS_CODE;
1514 if (sp->Session_ID == 0) {
1515 neg->pkt->pkt_header.ph.sid =
1516 htons(pppoe_getnewsession(sp));
1517 }
1518 send_sessionid(sp);
1519 neg->timeout = 0;
1520 /*
1521 * start working out the tags to respond with.
1522 */
1523 init_tags(sp);
1524 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
1525 if ((tag = get_tag(ph, PTT_SRV_NAME)))
1526 insert_tag(sp, tag);/* return service */
1527 if ((tag = get_tag(ph, PTT_HOST_UNIQ)))
1528 insert_tag(sp, tag); /* return it */
1529 insert_tag(sp, utag); /* ac_cookie */
1530 scan_tags(sp, ph);
1531 make_packet(sp);
1532 sp->state = PPPOE_NEWCONNECTED;
1533
1534 /* Send the PADS without a timeout - we're now connected. */
1535 m0 = m_copypacket(sp->neg->m, MB_DONTWAIT);
1536 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1537
1538 /*
1539 * Having sent the last Negotiation header,
1540 * Set up the stored packet header to be correct for
1541 * the actual session. But keep the negotialtion stuff
1542 * around in case we need to resend this last packet.
1543 * We'll discard it when we move from NEWCONNECTED
1544 * to CONNECTED
1545 */
1546 sp->pkt_hdr = neg->pkt->pkt_header;
1547 /* Configure ethertype depending on what
1548 * ethertype was used at discovery phase */
1549 if (sp->pkt_hdr.eh.ether_type ==
1550 ETHERTYPE_PPPOE_3COM_DISC)
1551 sp->pkt_hdr.eh.ether_type
1552 = ETHERTYPE_PPPOE_3COM_SESS;
1553 else
1554 sp->pkt_hdr.eh.ether_type
1555 = ETHERTYPE_PPPOE_SESS;
1556 sp->pkt_hdr.ph.code = 0;
1557 pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
1558 break;
1559 case PADS_CODE:
1560 /*
1561 * We are a client:
1562 * Use the host_uniq tag to find the hook this is in
1563 * response to. Take the session ID and store it away.
1564 * Also make sure the pre-made header is correct and
1565 * set us into Session mode.
1566 */
1567 utag = get_tag(ph, PTT_HOST_UNIQ);
1568 if ((utag == NULL) ||
1569 (ntohs(utag->tag_len) != sizeof(sp))) {
1570 LEAVE (ENETUNREACH);
1571 }
1572 sendhook = pppoe_finduniq(node, utag);
1573 if (sendhook == NULL)
1574 LEAVE(ENETUNREACH);
1575
1576 /*
1577 * Check the session is in the right state.
1578 * It needs to be in PPPOE_SREQ.
1579 */
1580 sp = NG_HOOK_PRIVATE(sendhook);
1581 if (sp->state != PPPOE_SREQ)
1582 LEAVE(ENETUNREACH);
1583 neg = sp->neg;
1584 ng_uncallout(&neg->handle, node);
1585 neg->pkt->pkt_header.ph.sid = wh->ph.sid;
1586 sp->Session_ID = ntohs(wh->ph.sid);
1587 pppoe_addsession(sp);
1588 send_sessionid(sp);
1589 neg->timeout = 0;
1590 sp->state = PPPOE_CONNECTED;
1591 /*
1592 * Now we have gone to Connected mode,
1593 * Free all resources needed for negotiation.
1594 * Keep a copy of the header we will be using.
1595 */
1596 sp->pkt_hdr = neg->pkt->pkt_header;
1597 if (privp->flags & COMPAT_3COM)
1598 sp->pkt_hdr.eh.ether_type
1599 = ETHERTYPE_PPPOE_3COM_SESS;
1600 else
1601 sp->pkt_hdr.eh.ether_type
1602 = ETHERTYPE_PPPOE_SESS;
1603 sp->pkt_hdr.ph.code = 0;
1604 m_freem(neg->m);
1605 kfree(sp->neg, M_NETGRAPH_PPPOE);
1606 sp->neg = NULL;
1607 pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
1608 break;
1609 case PADT_CODE:
1610 /*
1611 * Find matching peer/session combination.
1612 */
1613 sp = pppoe_findsession(privp, wh);
1614 if (sp == NULL)
1615 LEAVE(ENETUNREACH);
1616 /* Disconnect that hook. */
1617 ng_rmhook_self(sp->hook);
1618 break;
1619 default:
1620 LEAVE(EPFNOSUPPORT);
1621 }
1622 break;
1623 case ETHERTYPE_PPPOE_3COM_SESS:
1624 case ETHERTYPE_PPPOE_SESS:
1625 /*
1626 * Find matching peer/session combination.
1627 */
1628 sp = pppoe_findsession(privp, wh);
1629 if (sp == NULL)
1630 LEAVE (ENETUNREACH);
1631 m_adj(m, sizeof(*wh));
1632
1633 /* If packet too short, dump it. */
1634 if (m->m_pkthdr.len < length)
1635 LEAVE(EMSGSIZE);
1636 /* Also need to trim excess at the end */
1637 if (m->m_pkthdr.len > length) {
1638 m_adj(m, -((int)(m->m_pkthdr.len - length)));
1639 }
1640 if ( sp->state != PPPOE_CONNECTED) {
1641 if (sp->state == PPPOE_NEWCONNECTED) {
1642 sp->state = PPPOE_CONNECTED;
1643 /*
1644 * Now we have gone to Connected mode,
1645 * Free all resources needed for negotiation.
1646 * Be paranoid about whether there may be
1647 * a timeout.
1648 */
1649 m_freem(sp->neg->m);
1650 ng_uncallout(&sp->neg->handle, node);
1651 kfree(sp->neg, M_NETGRAPH_PPPOE);
1652 sp->neg = NULL;
1653 } else {
1654 LEAVE (ENETUNREACH);
1655 }
1656 }
1657 NG_FWD_NEW_DATA(error, item, sp->hook, m);
1658 break;
1659 default:
1660 LEAVE(EPFNOSUPPORT);
1661 }
1662 quit:
1663 if (item)
1664 NG_FREE_ITEM(item);
1665 NG_FREE_M(m);
1666 return (error);
1667 }
1668
1669 /*
1670 * Receive data from debug hook and bypass it to ether.
1671 */
1672 static int
1673 ng_pppoe_rcvdata_debug(hook_p hook, item_p item)
1674 {
1675 node_p node = NG_HOOK_NODE(hook);
1676 const priv_p privp = NG_NODE_PRIVATE(node);
1677 int error;
1678
1679 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1680 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1681
1682 NG_FWD_ITEM_HOOK(error, item, privp->ethernet_hook);
1683 privp->packets_out++;
1684 return (error);
1685 }
1686
1687 /*
1688 * Do local shutdown processing..
1689 * If we are a persistant device, we might refuse to go away, and
1690 * we'd only remove our links and reset ourself.
1691 */
1692 static int
1693 ng_pppoe_shutdown(node_p node)
1694 {
1695 const priv_p privp = NG_NODE_PRIVATE(node);
1696 int i;
1697
1698 for (i = 0; i < SESSHASHSIZE; i++)
1699 mtx_destroy(&privp->sesshash[i].mtx);
1700 NG_NODE_SET_PRIVATE(node, NULL);
1701 NG_NODE_UNREF(privp->node);
1702 kfree(privp, M_NETGRAPH_PPPOE);
1703 return (0);
1704 }
1705
1706 /*
1707 * Hook disconnection
1708 *
1709 * Clean up all dangling links and information about the session/hook.
1710 * For this type, removal of the last link destroys the node.
1711 */
1712 static int
1713 ng_pppoe_disconnect(hook_p hook)
1714 {
1715 node_p node = NG_HOOK_NODE(hook);
1716 priv_p privp = NG_NODE_PRIVATE(node);
1717 sessp sp;
1718
1719 if (hook == privp->debug_hook) {
1720 privp->debug_hook = NULL;
1721 } else if (hook == privp->ethernet_hook) {
1722 privp->ethernet_hook = NULL;
1723 if (NG_NODE_IS_VALID(node))
1724 ng_rmnode_self(node);
1725 } else {
1726 sp = NG_HOOK_PRIVATE(hook);
1727 if (sp->state != PPPOE_SNONE ) {
1728 pppoe_send_event(sp, NGM_PPPOE_CLOSE);
1729 }
1730 /*
1731 * According to the spec, if we are connected,
1732 * we should send a DISC packet if we are shutting down
1733 * a session.
1734 */
1735 if ((privp->ethernet_hook)
1736 && ((sp->state == PPPOE_CONNECTED)
1737 || (sp->state == PPPOE_NEWCONNECTED))) {
1738 struct mbuf *m;
1739
1740 /* Generate a packet of that type. */
1741 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1742 if (m == NULL)
1743 log(LOG_NOTICE, "ng_pppoe[%x]: session out of "
1744 "mbufs\n", node->nd_ID);
1745 else {
1746 struct pppoe_full_hdr *wh;
1747 struct pppoe_tag *tag;
1748 int msglen = strlen(SIGNOFF);
1749 int error = 0;
1750
1751 m->m_pkthdr.rcvif = NULL;
1752 m->m_pkthdr.len = m->m_len = sizeof(*wh);
1753 wh = mtod(m, struct pppoe_full_hdr *);
1754 bcopy(&sp->pkt_hdr, wh, sizeof(*wh));
1755
1756 /* Revert the stored header to DISC/PADT mode. */
1757 wh->ph.code = PADT_CODE;
1758 /*
1759 * Configure ethertype depending on what
1760 * was used during sessions stage.
1761 */
1762 if (wh->eh.ether_type ==
1763 ETHERTYPE_PPPOE_3COM_SESS)
1764 wh->eh.ether_type = ETHERTYPE_PPPOE_3COM_DISC;
1765 else
1766 wh->eh.ether_type = ETHERTYPE_PPPOE_DISC;
1767 /*
1768 * Add a General error message and adjust
1769 * sizes.
1770 */
1771 tag = wh->ph.tag;
1772 tag->tag_type = PTT_GEN_ERR;
1773 tag->tag_len = htons((u_int16_t)msglen);
1774 strncpy(tag->tag_data, SIGNOFF, msglen);
1775 m->m_pkthdr.len = (m->m_len += sizeof(*tag) +
1776 msglen);
1777 wh->ph.length = htons(sizeof(*tag) + msglen);
1778 NG_SEND_DATA_ONLY(error,
1779 privp->ethernet_hook, m);
1780 }
1781 }
1782 if (sp->state == PPPOE_LISTENING)
1783 LIST_REMOVE(sp, sessions);
1784 else if (sp->Session_ID)
1785 pppoe_delsession(sp);
1786 /*
1787 * As long as we have somewhere to store the timeout handle,
1788 * we may have a timeout pending.. get rid of it.
1789 */
1790 if (sp->neg) {
1791 ng_uncallout(&sp->neg->handle, node);
1792 if (sp->neg->m)
1793 m_freem(sp->neg->m);
1794 kfree(sp->neg, M_NETGRAPH_PPPOE);
1795 }
1796 kfree(sp, M_NETGRAPH_PPPOE);
1797 NG_HOOK_SET_PRIVATE(hook, NULL);
1798 }
1799 if ((NG_NODE_NUMHOOKS(node) == 0) &&
1800 (NG_NODE_IS_VALID(node)))
1801 ng_rmnode_self(node);
1802 return (0);
1803 }
1804
1805 /*
1806 * Timeouts come here.
1807 */
1808 static void
1809 pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2)
1810 {
1811 priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
1812 sessp sp = NG_HOOK_PRIVATE(hook);
1813 negp neg = sp->neg;
1814 struct mbuf *m0 = NULL;
1815 int error = 0;
1816
1817 CTR6(KTR_NET, "%20s: node [%x] (%p) hook \"%s\" (%p) session %d",
1818 __func__, node->nd_ID, node, hook->hk_name, hook, sp->Session_ID);
1819 switch(sp->state) {
1820 /*
1821 * Resend the last packet, using an exponential backoff.
1822 * After a period of time, stop growing the backoff,
1823 * And either leave it, or revert to the start.
1824 */
1825 case PPPOE_SINIT:
1826 case PPPOE_SREQ:
1827 /* Timeouts on these produce resends. */
1828 m0 = m_copypacket(sp->neg->m, MB_DONTWAIT);
1829 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0);
1830 ng_callout(&neg->handle, node, hook, neg->timeout * hz,
1831 pppoe_ticker, NULL, 0);
1832 if ((neg->timeout <<= 1) > PPPOE_TIMEOUT_LIMIT) {
1833 if (sp->state == PPPOE_SREQ) {
1834 /* Revert to SINIT mode. */
1835 pppoe_start(sp);
1836 } else {
1837 neg->timeout = PPPOE_TIMEOUT_LIMIT;
1838 }
1839 }
1840 break;
1841 case PPPOE_PRIMED:
1842 case PPPOE_SOFFER:
1843 /* A timeout on these says "give up" */
1844 ng_rmhook_self(hook);
1845 break;
1846 default:
1847 /* Timeouts have no meaning in other states. */
1848 log(LOG_NOTICE, "ng_pppoe[%x]: unexpected timeout\n",
1849 node->nd_ID);
1850 }
1851 }
1852
1853 /*
1854 * Parse an incoming packet to see if any tags should be copied to the
1855 * output packet. Don't do any tags that have been handled in the main
1856 * state machine.
1857 */
1858 static const struct pppoe_tag*
1859 scan_tags(sessp sp, const struct pppoe_hdr* ph)
1860 {
1861 const char *const end = (const char *)next_tag(ph);
1862 const char *ptn;
1863 const struct pppoe_tag *pt = &ph->tag[0];
1864
1865 /*
1866 * Keep processing tags while a tag header will still fit.
1867 */
1868 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1869
1870 while((const char*)(pt + 1) <= end) {
1871 /*
1872 * If the tag data would go past the end of the packet, abort.
1873 */
1874 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len));
1875 if(ptn > end)
1876 return NULL;
1877
1878 switch (pt->tag_type) {
1879 case PTT_RELAY_SID:
1880 insert_tag(sp, pt);
1881 break;
1882 case PTT_EOL:
1883 return NULL;
1884 case PTT_SRV_NAME:
1885 case PTT_AC_NAME:
1886 case PTT_HOST_UNIQ:
1887 case PTT_AC_COOKIE:
1888 case PTT_VENDOR:
1889 case PTT_SRV_ERR:
1890 case PTT_SYS_ERR:
1891 case PTT_GEN_ERR:
1892 break;
1893 }
1894 pt = (const struct pppoe_tag*)ptn;
1895 }
1896 return NULL;
1897 }
1898
1899 static int
1900 pppoe_send_event(sessp sp, enum cmd cmdid)
1901 {
1902 int error;
1903 struct ng_mesg *msg;
1904 struct ngpppoe_sts *sts;
1905
1906 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1907
1908 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, cmdid,
1909 sizeof(struct ngpppoe_sts), M_WAITOK | M_NULLOK);
1910 if (msg == NULL)
1911 return (ENOMEM);
1912 sts = (struct ngpppoe_sts *)msg->data;
1913 strncpy(sts->hook, NG_HOOK_NAME(sp->hook), NG_HOOKSIZ);
1914 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1915 return (error);
1916 }
DragonFly BSD