?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Vendor import of netgraph from FreeBSD-current 20080626
[dragonfly.git] / sys / netgraph7 / ng_pppoe.c
blob0ed0adb48f2b110e1e17cf55bfc26635fed04f1e
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/ktr.h>
48 #include <sys/mbuf.h>
49 #include <sys/malloc.h>
50 #include <sys/errno.h>
51 #include <sys/syslog.h>
52 #include <net/ethernet.h>
53
54 #include <netgraph/ng_message.h>
55 #include <netgraph/netgraph.h>
56 #include <netgraph/ng_parse.h>
57 #include <netgraph/ng_pppoe.h>
58 #include <netgraph/ng_ether.h>
59
60 #ifdef NG_SEPARATE_MALLOC
61 MALLOC_DEFINE(M_NETGRAPH_PPPOE, "netgraph_pppoe", "netgraph pppoe node");
62 #else
63 #define M_NETGRAPH_PPPOE M_NETGRAPH
64 #endif
65
66 #define SIGNOFF "session closed"
67
68 /*
69 * This section contains the netgraph method declarations for the
70 * pppoe node. These methods define the netgraph pppoe 'type'.
71 */
72
73 static ng_constructor_t ng_pppoe_constructor;
74 static ng_rcvmsg_t ng_pppoe_rcvmsg;
75 static ng_shutdown_t ng_pppoe_shutdown;
76 static ng_newhook_t ng_pppoe_newhook;
77 static ng_connect_t ng_pppoe_connect;
78 static ng_rcvdata_t ng_pppoe_rcvdata;
79 static ng_rcvdata_t ng_pppoe_rcvdata_ether;
80 static ng_rcvdata_t ng_pppoe_rcvdata_debug;
81 static ng_disconnect_t ng_pppoe_disconnect;
82
83 /* Parse type for struct ngpppoe_init_data */
84 static const struct ng_parse_struct_field ngpppoe_init_data_type_fields[]
85 = NG_PPPOE_INIT_DATA_TYPE_INFO;
86 static const struct ng_parse_type ngpppoe_init_data_state_type = {
87 &ng_parse_struct_type,
88 &ngpppoe_init_data_type_fields
89 };
90
91 /* Parse type for struct ngpppoe_sts */
92 static const struct ng_parse_struct_field ng_pppoe_sts_type_fields[]
93 = NG_PPPOE_STS_TYPE_INFO;
94 static const struct ng_parse_type ng_pppoe_sts_state_type = {
95 &ng_parse_struct_type,
96 &ng_pppoe_sts_type_fields
97 };
98
99 /* List of commands and how to convert arguments to/from ASCII */
100 static const struct ng_cmdlist ng_pppoe_cmds[] = {
101 {
102 NGM_PPPOE_COOKIE,
103 NGM_PPPOE_CONNECT,
104 "pppoe_connect",
105 &ngpppoe_init_data_state_type,
106 NULL
107 },
108 {
109 NGM_PPPOE_COOKIE,
110 NGM_PPPOE_LISTEN,
111 "pppoe_listen",
112 &ngpppoe_init_data_state_type,
113 NULL
114 },
115 {
116 NGM_PPPOE_COOKIE,
117 NGM_PPPOE_OFFER,
118 "pppoe_offer",
119 &ngpppoe_init_data_state_type,
120 NULL
121 },
122 {
123 NGM_PPPOE_COOKIE,
124 NGM_PPPOE_SERVICE,
125 "pppoe_service",
126 &ngpppoe_init_data_state_type,
127 NULL
128 },
129 {
130 NGM_PPPOE_COOKIE,
131 NGM_PPPOE_SUCCESS,
132 "pppoe_success",
133 &ng_pppoe_sts_state_type,
134 NULL
135 },
136 {
137 NGM_PPPOE_COOKIE,
138 NGM_PPPOE_FAIL,
139 "pppoe_fail",
140 &ng_pppoe_sts_state_type,
141 NULL
142 },
143 {
144 NGM_PPPOE_COOKIE,
145 NGM_PPPOE_CLOSE,
146 "pppoe_close",
147 &ng_pppoe_sts_state_type,
148 NULL
149 },
150 {
151 NGM_PPPOE_COOKIE,
152 NGM_PPPOE_SETMODE,
153 "pppoe_setmode",
154 &ng_parse_string_type,
155 NULL
156 },
157 {
158 NGM_PPPOE_COOKIE,
159 NGM_PPPOE_GETMODE,
160 "pppoe_getmode",
161 NULL,
162 &ng_parse_string_type
163 },
164 {
165 NGM_PPPOE_COOKIE,
166 NGM_PPPOE_SETENADDR,
167 "setenaddr",
168 &ng_parse_enaddr_type,
169 NULL
170 },
171 { 0 }
172 };
173
174 /* Netgraph node type descriptor */
175 static struct ng_type typestruct = {
176 .version = NG_ABI_VERSION,
177 .name = NG_PPPOE_NODE_TYPE,
178 .constructor = ng_pppoe_constructor,
179 .rcvmsg = ng_pppoe_rcvmsg,
180 .shutdown = ng_pppoe_shutdown,
181 .newhook = ng_pppoe_newhook,
182 .connect = ng_pppoe_connect,
183 .rcvdata = ng_pppoe_rcvdata,
184 .disconnect = ng_pppoe_disconnect,
185 .cmdlist = ng_pppoe_cmds,
186 };
187 NETGRAPH_INIT(pppoe, &typestruct);
188
189 /*
190 * States for the session state machine.
191 * These have no meaning if there is no hook attached yet.
192 */
193 enum state {
194 PPPOE_SNONE=0, /* [both] Initial state */
195 PPPOE_LISTENING, /* [Daemon] Listening for discover initiation pkt */
196 PPPOE_SINIT, /* [Client] Sent discovery initiation */
197 PPPOE_PRIMED, /* [Server] Awaiting PADI from daemon */
198 PPPOE_SOFFER, /* [Server] Sent offer message (got PADI)*/
199 PPPOE_SREQ, /* [Client] Sent a Request */
200 PPPOE_NEWCONNECTED, /* [Server] Connection established, No data received */
201 PPPOE_CONNECTED, /* [Both] Connection established, Data received */
202 PPPOE_DEAD /* [Both] */
203 };
204
205 #define NUMTAGS 20 /* number of tags we are set up to work with */
206
207 /*
208 * Information we store for each hook on each node for negotiating the
209 * session. The mbuf and cluster are freed once negotiation has completed.
210 * The whole negotiation block is then discarded.
211 */
212
213 struct sess_neg {
214 struct mbuf *m; /* holds cluster with last sent packet */
215 union packet *pkt; /* points within the above cluster */
216 struct callout handle; /* see timeout(9) */
217 u_int timeout; /* 0,1,2,4,8,16 etc. seconds */
218 u_int numtags;
219 const struct pppoe_tag *tags[NUMTAGS];
220 u_int service_len;
221 u_int ac_name_len;
222
223 struct datatag service;
224 struct datatag ac_name;
225 };
226 typedef struct sess_neg *negp;
227
228 /*
229 * Session information that is needed after connection.
230 */
231 struct sess_con {
232 hook_p hook;
233 uint16_t Session_ID;
234 enum state state;
235 ng_ID_t creator; /* who to notify */
236 struct pppoe_full_hdr pkt_hdr; /* used when connected */
237 negp neg; /* used when negotiating */
238 LIST_ENTRY(sess_con) sessions;
239 };
240 typedef struct sess_con *sessp;
241
242 #define SESSHASHSIZE 0x0100
243 #define SESSHASH(x) (((x) ^ ((x) >> 8)) & (SESSHASHSIZE - 1))
244
245 struct sess_hash_entry {
246 struct mtx mtx;
247 LIST_HEAD(hhead, sess_con) head;
248 };
249
250 /*
251 * Information we store for each node
252 */
253 struct PPPoE {
254 node_p node; /* back pointer to node */
255 hook_p ethernet_hook;
256 hook_p debug_hook;
257 u_int packets_in; /* packets in from ethernet */
258 u_int packets_out; /* packets out towards ethernet */
259 uint32_t flags;
260 #define COMPAT_3COM 0x00000001
261 #define COMPAT_DLINK 0x00000002
262 struct ether_header eh;
263 LIST_HEAD(, sess_con) listeners;
264 struct sess_hash_entry sesshash[SESSHASHSIZE];
265 };
266 typedef struct PPPoE *priv_p;
267
268 union uniq {
269 char bytes[sizeof(void *)];
270 void *pointer;
271 };
272
273 #define LEAVE(x) do { error = x; goto quit; } while(0)
274 static void pppoe_start(sessp sp);
275 static void pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2);
276 static const struct pppoe_tag *scan_tags(sessp sp,
277 const struct pppoe_hdr* ph);
278 static int pppoe_send_event(sessp sp, enum cmd cmdid);
279
280 /*************************************************************************
281 * Some basic utilities from the Linux version with author's permission.*
282 * Author: Michal Ostrowski <mostrows@styx.uwaterloo.ca> *
283 ************************************************************************/
284
285
286
287 /*
288 * Return the location where the next tag can be put
289 */
290 static __inline const struct pppoe_tag*
291 next_tag(const struct pppoe_hdr* ph)
292 {
293 return (const struct pppoe_tag*)(((const char*)&ph->tag[0])
294 + ntohs(ph->length));
295 }
296
297 /*
298 * Look for a tag of a specific type.
299 * Don't trust any length the other end says,
300 * but assume we already sanity checked ph->length.
301 */
302 static const struct pppoe_tag*
303 get_tag(const struct pppoe_hdr* ph, uint16_t idx)
304 {
305 const char *const end = (const char *)next_tag(ph);
306 const struct pppoe_tag *pt = &ph->tag[0];
307 const char *ptn;
308
309 /*
310 * Keep processing tags while a tag header will still fit.
311 */
312 while((const char*)(pt + 1) <= end) {
313 /*
314 * If the tag data would go past the end of the packet, abort.
315 */
316 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len));
317 if (ptn > end) {
318 CTR2(KTR_NET, "%20s: invalid length for tag %d",
319 __func__, idx);
320 return (NULL);
321 }
322 if (pt->tag_type == idx) {
323 CTR2(KTR_NET, "%20s: found tag %d", __func__, idx);
324 return (pt);
325 }
326
327 pt = (const struct pppoe_tag*)ptn;
328 }
329
330 CTR2(KTR_NET, "%20s: not found tag %d", __func__, idx);
331 return (NULL);
332 }
333
334 /**************************************************************************
335 * Inlines to initialise or add tags to a session's tag list.
336 **************************************************************************/
337 /*
338 * Initialise the session's tag list.
339 */
340 static void
341 init_tags(sessp sp)
342 {
343 KASSERT(sp->neg != NULL, ("%s: no neg", __func__));
344 sp->neg->numtags = 0;
345 }
346
347 static void
348 insert_tag(sessp sp, const struct pppoe_tag *tp)
349 {
350 negp neg = sp->neg;
351 int i;
352
353 KASSERT(neg != NULL, ("%s: no neg", __func__));
354 if ((i = neg->numtags++) < NUMTAGS) {
355 neg->tags[i] = tp;
356 } else {
357 log(LOG_NOTICE, "ng_pppoe: asked to add too many tags to "
358 "packet\n");
359 neg->numtags--;
360 }
361 }
362
363 /*
364 * Make up a packet, using the tags filled out for the session.
365 *
366 * Assume that the actual pppoe header and ethernet header
367 * are filled out externally to this routine.
368 * Also assume that neg->wh points to the correct
369 * location at the front of the buffer space.
370 */
371 static void
372 make_packet(sessp sp) {
373 struct pppoe_full_hdr *wh = &sp->neg->pkt->pkt_header;
374 const struct pppoe_tag **tag;
375 char *dp;
376 int count;
377 int tlen;
378 uint16_t length = 0;
379
380 KASSERT((sp->neg != NULL) && (sp->neg->m != NULL),
381 ("%s: called from wrong state", __func__));
382 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
383
384 dp = (char *)wh->ph.tag;
385 for (count = 0, tag = sp->neg->tags;
386 ((count < sp->neg->numtags) && (count < NUMTAGS));
387 tag++, count++) {
388 tlen = ntohs((*tag)->tag_len) + sizeof(**tag);
389 if ((length + tlen) > (ETHER_MAX_LEN - 4 - sizeof(*wh))) {
390 log(LOG_NOTICE, "ng_pppoe: tags too long\n");
391 sp->neg->numtags = count;
392 break; /* XXX chop off what's too long */
393 }
394 bcopy(*tag, (char *)dp, tlen);
395 length += tlen;
396 dp += tlen;
397 }
398 wh->ph.length = htons(length);
399 sp->neg->m->m_len = length + sizeof(*wh);
400 sp->neg->m->m_pkthdr.len = length + sizeof(*wh);
401 }
402
403 /**************************************************************************
404 * Routines to match a service. *
405 **************************************************************************/
406
407 /*
408 * Find a hook that has a service string that matches that
409 * we are seeking. For now use a simple string.
410 * In the future we may need something like regexp().
411 *
412 * Null string is a wildcard (ANY service), according to RFC2516.
413 * And historical FreeBSD wildcard is also "*".
414 */
415
416 static hook_p
417 pppoe_match_svc(node_p node, const struct pppoe_tag *tag)
418 {
419 const priv_p privp = NG_NODE_PRIVATE(node);
420 sessp sp;
421
422 LIST_FOREACH(sp, &privp->listeners, sessions) {
423 negp neg = sp->neg;
424
425 /* Empty Service-Name matches any service. */
426 if (neg->service_len == 0)
427 break;
428
429 /* Special case for a blank or "*" service name (wildcard). */
430 if (neg->service_len == 1 && neg->service.data[0] == '*')
431 break;
432
433 /* If the lengths don't match, that aint it. */
434 if (neg->service_len != ntohs(tag->tag_len))
435 continue;
436
437 if (strncmp(tag->tag_data, neg->service.data,
438 ntohs(tag->tag_len)) == 0)
439 break;
440 }
441 CTR3(KTR_NET, "%20s: matched %p for %s", __func__,
442 sp?sp->hook:NULL, tag->tag_data);
443
444 return (sp?sp->hook:NULL);
445 }
446
447 /*
448 * Broadcast the PADI packet in m0 to all listening hooks.
449 * This routine is called when a PADI with empty Service-Name
450 * tag is received. Client should receive PADOs with all
451 * available services.
452 */
453 static int
454 pppoe_broadcast_padi(node_p node, struct mbuf *m0)
455 {
456 const priv_p privp = NG_NODE_PRIVATE(node);
457 sessp sp;
458 int error = 0;
459
460 LIST_FOREACH(sp, &privp->listeners, sessions) {
461 struct mbuf *m;
462
463 m = m_dup(m0, M_DONTWAIT);
464 if (m == NULL)
465 return (ENOMEM);
466 NG_SEND_DATA_ONLY(error, sp->hook, m);
467 if (error)
468 return (error);
469 }
470
471 return (0);
472 }
473
474 /*
475 * Find a hook, which name equals to given service.
476 */
477 static hook_p
478 pppoe_find_svc(node_p node, const char *svc_name, int svc_len)
479 {
480 const priv_p privp = NG_NODE_PRIVATE(node);
481 sessp sp;
482
483 LIST_FOREACH(sp, &privp->listeners, sessions) {
484 negp neg = sp->neg;
485
486 if (neg->service_len == svc_len &&
487 strncmp(svc_name, neg->service.data, svc_len) == 0)
488 return (sp->hook);
489 }
490
491 return (NULL);
492 }
493
494 /**************************************************************************
495 * Routines to find a particular session that matches an incoming packet. *
496 **************************************************************************/
497 /* Find free session and add to hash. */
498 static uint16_t
499 pppoe_getnewsession(sessp sp)
500 {
501 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
502 static uint16_t pppoe_sid = 1;
503 sessp tsp;
504 uint16_t val, hash;
505
506 restart:
507 /* Atomicity is not needed here as value will be checked. */
508 val = pppoe_sid++;
509 /* Spec says 0xFFFF is reserved, also don't use 0x0000. */
510 if (val == 0xffff || val == 0x0000)
511 val = pppoe_sid = 1;
512
513 /* Check it isn't already in use. */
514 hash = SESSHASH(val);
515 mtx_lock(&privp->sesshash[hash].mtx);
516 LIST_FOREACH(tsp, &privp->sesshash[hash].head, sessions) {
517 if (tsp->Session_ID == val)
518 break;
519 }
520 if (!tsp) {
521 sp->Session_ID = val;
522 LIST_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions);
523 }
524 mtx_unlock(&privp->sesshash[hash].mtx);
525 if (tsp)
526 goto restart;
527
528 CTR2(KTR_NET, "%20s: new sid %d", __func__, val);
529
530 return (val);
531 }
532
533 /* Add specified session to hash. */
534 static void
535 pppoe_addsession(sessp sp)
536 {
537 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
538 uint16_t hash = SESSHASH(sp->Session_ID);
539
540 mtx_lock(&privp->sesshash[hash].mtx);
541 LIST_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions);
542 mtx_unlock(&privp->sesshash[hash].mtx);
543 }
544
545 /* Delete specified session from hash. */
546 static void
547 pppoe_delsession(sessp sp)
548 {
549 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook));
550 uint16_t hash = SESSHASH(sp->Session_ID);
551
552 mtx_lock(&privp->sesshash[hash].mtx);
553 LIST_REMOVE(sp, sessions);
554 mtx_unlock(&privp->sesshash[hash].mtx);
555 }
556
557 /* Find matching peer/session combination. */
558 static sessp
559 pppoe_findsession(priv_p privp, const struct pppoe_full_hdr *wh)
560 {
561 uint16_t session = ntohs(wh->ph.sid);
562 uint16_t hash = SESSHASH(session);
563 sessp sp = NULL;
564
565 mtx_lock(&privp->sesshash[hash].mtx);
566 LIST_FOREACH(sp, &privp->sesshash[hash].head, sessions) {
567 if (sp->Session_ID == session &&
568 bcmp(sp->pkt_hdr.eh.ether_dhost,
569 wh->eh.ether_shost, ETHER_ADDR_LEN) == 0) {
570 break;
571 }
572 }
573 mtx_unlock(&privp->sesshash[hash].mtx);
574 CTR3(KTR_NET, "%20s: matched %p for %d", __func__, sp?sp->hook:NULL,
575 session);
576
577 return (sp);
578 }
579
580 static hook_p
581 pppoe_finduniq(node_p node, const struct pppoe_tag *tag)
582 {
583 hook_p hook = NULL;
584 union uniq uniq;
585
586 bcopy(tag->tag_data, uniq.bytes, sizeof(void *));
587 /* Cycle through all known hooks. */
588 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
589 /* Skip any nonsession hook. */
590 if (NG_HOOK_PRIVATE(hook) == NULL)
591 continue;
592 if (uniq.pointer == NG_HOOK_PRIVATE(hook))
593 break;
594 }
595 CTR3(KTR_NET, "%20s: matched %p for %p", __func__, hook, uniq.pointer);
596
597 return (hook);
598 }
599
600 /**************************************************************************
601 * Start of Netgraph entrypoints. *
602 **************************************************************************/
603
604 /*
605 * Allocate the private data structure and link it with node.
606 */
607 static int
608 ng_pppoe_constructor(node_p node)
609 {
610 priv_p privp;
611 int i;
612
613 /* Initialize private descriptor. */
614 privp = malloc(sizeof(*privp), M_NETGRAPH_PPPOE, M_NOWAIT | M_ZERO);
615 if (privp == NULL)
616 return (ENOMEM);
617
618 /* Link structs together; this counts as our one reference to *node. */
619 NG_NODE_SET_PRIVATE(node, privp);
620 privp->node = node;
621
622 /* Initialize to standard mode. */
623 memset(&privp->eh.ether_dhost, 0xff, ETHER_ADDR_LEN);
624 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
625
626 LIST_INIT(&privp->listeners);
627 for (i = 0; i < SESSHASHSIZE; i++) {
628 mtx_init(&privp->sesshash[i].mtx, "PPPoE hash mutex", NULL, MTX_DEF);
629 LIST_INIT(&privp->sesshash[i].head);
630 }
631
632 CTR3(KTR_NET, "%20s: created node [%x] (%p)",
633 __func__, node->nd_ID, node);
634
635 return (0);
636 }
637
638 /*
639 * Give our ok for a hook to be added...
640 * point the hook's private info to the hook structure.
641 *
642 * The following hook names are special:
643 * "ethernet": the hook that should be connected to a NIC.
644 * "debug": copies of data sent out here (when I write the code).
645 * All other hook names need only be unique. (the framework checks this).
646 */
647 static int
648 ng_pppoe_newhook(node_p node, hook_p hook, const char *name)
649 {
650 const priv_p privp = NG_NODE_PRIVATE(node);
651 sessp sp;
652
653 if (strcmp(name, NG_PPPOE_HOOK_ETHERNET) == 0) {
654 privp->ethernet_hook = hook;
655 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_ether);
656 } else if (strcmp(name, NG_PPPOE_HOOK_DEBUG) == 0) {
657 privp->debug_hook = hook;
658 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_debug);
659 } else {
660 /*
661 * Any other unique name is OK.
662 * The infrastructure has already checked that it's unique,
663 * so just allocate it and hook it in.
664 */
665 sp = malloc(sizeof(*sp), M_NETGRAPH_PPPOE, M_NOWAIT | M_ZERO);
666 if (sp == NULL)
667 return (ENOMEM);
668
669 NG_HOOK_SET_PRIVATE(hook, sp);
670 sp->hook = hook;
671 }
672 CTR5(KTR_NET, "%20s: node [%x] (%p) connected hook %s (%p)",
673 __func__, node->nd_ID, node, name, hook);
674
675 return(0);
676 }
677
678 /*
679 * Hook has been added successfully. Request the MAC address of
680 * the underlying Ethernet node.
681 */
682 static int
683 ng_pppoe_connect(hook_p hook)
684 {
685 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
686 struct ng_mesg *msg;
687 int error;
688
689 if (hook != privp->ethernet_hook)
690 return (0);
691
692 /*
693 * If this is Ethernet hook, then request MAC address
694 * from our downstream.
695 */
696 NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_ENADDR, 0, M_NOWAIT);
697 if (msg == NULL)
698 return (ENOBUFS);
699
700 /*
701 * Our hook and peer hook have HK_INVALID flag set,
702 * so we can't use NG_SEND_MSG_HOOK() macro here.
703 */
704 NG_SEND_MSG_ID(error, privp->node, msg,
705 NG_NODE_ID(NG_PEER_NODE(privp->ethernet_hook)),
706 NG_NODE_ID(privp->node));
707
708 return (error);
709 }
710 /*
711 * Get a netgraph control message.
712 * Check it is one we understand. If needed, send a response.
713 * We sometimes save the address for an async action later.
714 * Always free the message.
715 */
716 static int
717 ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
718 {
719 priv_p privp = NG_NODE_PRIVATE(node);
720 struct ngpppoe_init_data *ourmsg = NULL;
721 struct ng_mesg *resp = NULL;
722 int error = 0;
723 hook_p hook = NULL;
724 sessp sp = NULL;
725 negp neg = NULL;
726 struct ng_mesg *msg;
727
728 NGI_GET_MSG(item, msg);
729 CTR5(KTR_NET, "%20s: node [%x] (%p) got message %d with cookie %d",
730 __func__, node->nd_ID, node, msg->header.cmd,
731 msg->header.typecookie);
732
733 /* Deal with message according to cookie and command. */
734 switch (msg->header.typecookie) {
735 case NGM_PPPOE_COOKIE:
736 switch (msg->header.cmd) {
737 case NGM_PPPOE_CONNECT:
738 case NGM_PPPOE_LISTEN:
739 case NGM_PPPOE_OFFER:
740 case NGM_PPPOE_SERVICE:
741 ourmsg = (struct ngpppoe_init_data *)msg->data;
742 if (msg->header.arglen < sizeof(*ourmsg)) {
743 log(LOG_ERR, "ng_pppoe[%x]: init data too "
744 "small\n", node->nd_ID);
745 LEAVE(EMSGSIZE);
746 }
747 if (msg->header.arglen - sizeof(*ourmsg) >
748 PPPOE_SERVICE_NAME_SIZE) {
749 log(LOG_ERR, "ng_pppoe[%x]: service name "
750 "too big\n", node->nd_ID);
751 LEAVE(EMSGSIZE);
752 }
753 if (msg->header.arglen - sizeof(*ourmsg) <
754 ourmsg->data_len) {
755 log(LOG_ERR, "ng_pppoe[%x]: init data has bad "
756 "length, %d should be %zd\n", node->nd_ID,
757 ourmsg->data_len,
758 msg->header.arglen - sizeof (*ourmsg));
759 LEAVE(EMSGSIZE);
760 }
761
762 /* Make sure strcmp will terminate safely. */
763 ourmsg->hook[sizeof(ourmsg->hook) - 1] = '\0';
764
765 /* Find hook by name. */
766 hook = ng_findhook(node, ourmsg->hook);
767 if (hook == NULL)
768 LEAVE(ENOENT);
769
770 sp = NG_HOOK_PRIVATE(hook);
771 if (sp == NULL)
772 LEAVE(EINVAL);
773
774 if (msg->header.cmd == NGM_PPPOE_LISTEN) {
775 /*
776 * Ensure we aren't already listening for this
777 * service.
778 */
779 if (pppoe_find_svc(node, ourmsg->data,
780 ourmsg->data_len) != NULL)
781 LEAVE(EEXIST);
782 }
783
784 /*
785 * PPPOE_SERVICE advertisments are set up
786 * on sessions that are in PRIMED state.
787 */
788 if (msg->header.cmd == NGM_PPPOE_SERVICE)
789 break;
790
791 if (sp->state != PPPOE_SNONE) {
792 log(LOG_NOTICE, "ng_pppoe[%x]: Session already "
793 "active\n", node->nd_ID);
794 LEAVE(EISCONN);
795 }
796
797 /*
798 * Set up prototype header.
799 */
800 neg = malloc(sizeof(*neg), M_NETGRAPH_PPPOE,
801 M_NOWAIT | M_ZERO);
802
803 if (neg == NULL)
804 LEAVE(ENOMEM);
805
806 neg->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
807 if (neg->m == NULL) {
808 free(neg, M_NETGRAPH_PPPOE);
809 LEAVE(ENOBUFS);
810 }
811 neg->m->m_pkthdr.rcvif = NULL;
812 sp->neg = neg;
813 ng_callout_init(&neg->handle);
814 neg->m->m_len = sizeof(struct pppoe_full_hdr);
815 neg->pkt = mtod(neg->m, union packet*);
816 memcpy((void *)&neg->pkt->pkt_header.eh,
817 &privp->eh, sizeof(struct ether_header));
818 neg->pkt->pkt_header.ph.ver = 0x1;
819 neg->pkt->pkt_header.ph.type = 0x1;
820 neg->pkt->pkt_header.ph.sid = 0x0000;
821 neg->timeout = 0;
822
823 sp->creator = NGI_RETADDR(item);
824 }
825 switch (msg->header.cmd) {
826 case NGM_PPPOE_GET_STATUS:
827 {
828 struct ngpppoestat *stats;
829
830 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT);
831 if (!resp)
832 LEAVE(ENOMEM);
833
834 stats = (struct ngpppoestat *) resp->data;
835 stats->packets_in = privp->packets_in;
836 stats->packets_out = privp->packets_out;
837 break;
838 }
839 case NGM_PPPOE_CONNECT:
840 {
841 /*
842 * Check the hook exists and is Uninitialised.
843 * Send a PADI request, and start the timeout logic.
844 * Store the originator of this message so we can send
845 * a success of fail message to them later.
846 * Move the session to SINIT.
847 * Set up the session to the correct state and
848 * start it.
849 */
850 int i, acnlen = 0, acnsep = 0, srvlen;
851 for (i = 0; i < ourmsg->data_len; i++) {
852 if (ourmsg->data[i] == '\\') {
853 acnlen = i;
854 acnsep = 1;
855 break;
856 }
857 }
858 srvlen = ourmsg->data_len - acnlen - acnsep;
859
860 bcopy(ourmsg->data, neg->ac_name.data, acnlen);
861 neg->ac_name_len = acnlen;
862
863 neg->service.hdr.tag_type = PTT_SRV_NAME;
864 neg->service.hdr.tag_len = htons((uint16_t)srvlen);
865 bcopy(ourmsg->data + acnlen + acnsep,
866 neg->service.data, srvlen);
867 neg->service_len = srvlen;
868 pppoe_start(sp);
869 break;
870 }
871 case NGM_PPPOE_LISTEN:
872 /*
873 * Check the hook exists and is Uninitialised.
874 * Install the service matching string.
875 * Store the originator of this message so we can send
876 * a success of fail message to them later.
877 * Move the hook to 'LISTENING'
878 */
879 neg->service.hdr.tag_type = PTT_SRV_NAME;
880 neg->service.hdr.tag_len =
881 htons((uint16_t)ourmsg->data_len);
882
883 if (ourmsg->data_len)
884 bcopy(ourmsg->data, neg->service.data,
885 ourmsg->data_len);
886 neg->service_len = ourmsg->data_len;
887 neg->pkt->pkt_header.ph.code = PADT_CODE;
888 /*
889 * Wait for PADI packet coming from Ethernet.
890 */
891 sp->state = PPPOE_LISTENING;
892 LIST_INSERT_HEAD(&privp->listeners, sp, sessions);
893 break;
894 case NGM_PPPOE_OFFER:
895 /*
896 * Check the hook exists and is Uninitialised.
897 * Store the originator of this message so we can send
898 * a success of fail message to them later.
899 * Store the AC-Name given and go to PRIMED.
900 */
901 neg->ac_name.hdr.tag_type = PTT_AC_NAME;
902 neg->ac_name.hdr.tag_len =
903 htons((uint16_t)ourmsg->data_len);
904 if (ourmsg->data_len)
905 bcopy(ourmsg->data, neg->ac_name.data,
906 ourmsg->data_len);
907 neg->ac_name_len = ourmsg->data_len;
908 neg->pkt->pkt_header.ph.code = PADO_CODE;
909 /*
910 * Wait for PADI packet coming from hook.
911 */
912 sp->state = PPPOE_PRIMED;
913 break;
914 case NGM_PPPOE_SERVICE:
915 /*
916 * Check the session is primed.
917 * for now just allow ONE service to be advertised.
918 * If you do it twice you just overwrite.
919 */
920 if (sp->state != PPPOE_PRIMED) {
921 log(LOG_NOTICE, "ng_pppoe[%x]: session not "
922 "primed\n", node->nd_ID);
923 LEAVE(EISCONN);
924 }
925 neg = sp->neg;
926 neg->service.hdr.tag_type = PTT_SRV_NAME;
927 neg->service.hdr.tag_len =
928 htons((uint16_t)ourmsg->data_len);
929
930 if (ourmsg->data_len)
931 bcopy(ourmsg->data, neg->service.data,
932 ourmsg->data_len);
933 neg->service_len = ourmsg->data_len;
934 break;
935 case NGM_PPPOE_SETMODE:
936 {
937 char *s;
938 size_t len;
939
940 if (msg->header.arglen == 0)
941 LEAVE(EINVAL);
942
943 s = (char *)msg->data;
944 len = msg->header.arglen - 1;
945
946 /* Search for matching mode string. */
947 if (len == strlen(NG_PPPOE_STANDARD) &&
948 (strncmp(NG_PPPOE_STANDARD, s, len) == 0)) {
949 privp->flags = 0;
950 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
951 break;
952 }
953 if (len == strlen(NG_PPPOE_3COM) &&
954 (strncmp(NG_PPPOE_3COM, s, len) == 0)) {
955 privp->flags |= COMPAT_3COM;
956 privp->eh.ether_type =
957 ETHERTYPE_PPPOE_3COM_DISC;
958 break;
959 }
960 if (len == strlen(NG_PPPOE_DLINK) &&
961 (strncmp(NG_PPPOE_DLINK, s, len) == 0)) {
962 privp->flags |= COMPAT_DLINK;
963 break;
964 }
965 error = EINVAL;
966 break;
967 }
968 case NGM_PPPOE_GETMODE:
969 {
970 char *s;
971 size_t len = 0;
972
973 if (privp->flags == 0)
974 len += strlen(NG_PPPOE_STANDARD) + 1;
975 if (privp->flags & COMPAT_3COM)
976 len += strlen(NG_PPPOE_3COM) + 1;
977 if (privp->flags & COMPAT_DLINK)
978 len += strlen(NG_PPPOE_DLINK) + 1;
979
980 NG_MKRESPONSE(resp, msg, len, M_NOWAIT);
981 if (resp == NULL)
982 LEAVE(ENOMEM);
983
984 s = (char *)resp->data;
985 if (privp->flags == 0) {
986 len = strlen(NG_PPPOE_STANDARD);
987 strlcpy(s, NG_PPPOE_STANDARD, len + 1);
988 break;
989 }
990 if (privp->flags & COMPAT_3COM) {
991 len = strlen(NG_PPPOE_3COM);
992 strlcpy(s, NG_PPPOE_3COM, len + 1);
993 s += len;
994 }
995 if (privp->flags & COMPAT_DLINK) {
996 if (s != resp->data)
997 *s++ = '|';
998 len = strlen(NG_PPPOE_DLINK);
999 strlcpy(s, NG_PPPOE_DLINK, len + 1);
1000 }
1001 break;
1002 }
1003 case NGM_PPPOE_SETENADDR:
1004 if (msg->header.arglen != ETHER_ADDR_LEN)
1005 LEAVE(EINVAL);
1006 bcopy(msg->data, &privp->eh.ether_shost,
1007 ETHER_ADDR_LEN);
1008 break;
1009 default:
1010 LEAVE(EINVAL);
1011 }
1012 break;
1013 case NGM_ETHER_COOKIE:
1014 if (!(msg->header.flags & NGF_RESP))
1015 LEAVE(EINVAL);
1016 switch (msg->header.cmd) {
1017 case NGM_ETHER_GET_ENADDR:
1018 if (msg->header.arglen != ETHER_ADDR_LEN)
1019 LEAVE(EINVAL);
1020 bcopy(msg->data, &privp->eh.ether_shost,
1021 ETHER_ADDR_LEN);
1022 break;
1023 default:
1024 LEAVE(EINVAL);
1025 }
1026 break;
1027 default:
1028 LEAVE(EINVAL);
1029 }
1030
1031 /* Take care of synchronous response, if any. */
1032 quit:
1033 CTR2(KTR_NET, "%20s: returning %d", __func__, error);
1034 NG_RESPOND_MSG(error, node, item, resp);
1035 /* Free the message and return. */
1036 NG_FREE_MSG(msg);
1037 return(error);
1038 }
1039
1040 /*
1041 * Start a client into the first state. A separate function because
1042 * it can be needed if the negotiation times out.
1043 */
1044 static void
1045 pppoe_start(sessp sp)
1046 {
1047 hook_p hook = sp->hook;
1048 node_p node = NG_HOOK_NODE(hook);
1049 priv_p privp = NG_NODE_PRIVATE(node);
1050 negp neg = sp->neg;
1051 struct {
1052 struct pppoe_tag hdr;
1053 union uniq data;
1054 } __packed uniqtag;
1055 struct mbuf *m0;
1056 int error;
1057
1058 /*
1059 * Kick the state machine into starting up.
1060 */
1061 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1062 sp->state = PPPOE_SINIT;
1063 /*
1064 * Reset the packet header to broadcast. Since we are
1065 * in a client mode use configured ethertype.
1066 */
1067 memcpy((void *)&neg->pkt->pkt_header.eh, &privp->eh,
1068 sizeof(struct ether_header));
1069 neg->pkt->pkt_header.ph.code = PADI_CODE;
1070 uniqtag.hdr.tag_type = PTT_HOST_UNIQ;
1071 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data));
1072 uniqtag.data.pointer = sp;
1073 init_tags(sp);
1074 insert_tag(sp, &uniqtag.hdr);
1075 insert_tag(sp, &neg->service.hdr);
1076 make_packet(sp);
1077 /*
1078 * Send packet and prepare to retransmit it after timeout.
1079 */
1080 ng_callout(&neg->handle, node, hook, PPPOE_INITIAL_TIMEOUT * hz,
1081 pppoe_ticker, NULL, 0);
1082 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2;
1083 m0 = m_copypacket(neg->m, M_DONTWAIT);
1084 NG_SEND_DATA_ONLY(error, privp->ethernet_hook, m0);
1085 }
1086
1087 static int
1088 send_acname(sessp sp, const struct pppoe_tag *tag)
1089 {
1090 int error, tlen;
1091 struct ng_mesg *msg;
1092 struct ngpppoe_sts *sts;
1093
1094 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1095
1096 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_ACNAME,
1097 sizeof(struct ngpppoe_sts), M_NOWAIT);
1098 if (msg == NULL)
1099 return (ENOMEM);
1100
1101 sts = (struct ngpppoe_sts *)msg->data;
1102 tlen = min(NG_HOOKSIZ - 1, ntohs(tag->tag_len));
1103 strncpy(sts->hook, tag->tag_data, tlen);
1104 sts->hook[tlen] = '\0';
1105 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1106
1107 return (error);
1108 }
1109
1110 static int
1111 send_sessionid(sessp sp)
1112 {
1113 int error;
1114 struct ng_mesg *msg;
1115
1116 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1117
1118 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_SESSIONID,
1119 sizeof(uint16_t), M_NOWAIT);
1120 if (msg == NULL)
1121 return (ENOMEM);
1122
1123 *(uint16_t *)msg->data = sp->Session_ID;
1124 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1125
1126 return (error);
1127 }
1128
1129 /*
1130 * Receive data from session hook and do something with it.
1131 */
1132 static int
1133 ng_pppoe_rcvdata(hook_p hook, item_p item)
1134 {
1135 node_p node = NG_HOOK_NODE(hook);
1136 const priv_p privp = NG_NODE_PRIVATE(node);
1137 sessp sp = NG_HOOK_PRIVATE(hook);
1138 struct pppoe_full_hdr *wh;
1139 struct mbuf *m;
1140 int error;
1141
1142 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1143 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1144
1145 NGI_GET_M(item, m);
1146 switch (sp->state) {
1147 case PPPOE_NEWCONNECTED:
1148 case PPPOE_CONNECTED: {
1149 /*
1150 * Remove PPP address and control fields, if any.
1151 * For example, ng_ppp(4) always sends LCP packets
1152 * with address and control fields as required by
1153 * generic PPP. PPPoE is an exception to the rule.
1154 */
1155 if (m->m_pkthdr.len >= 2) {
1156 if (m->m_len < 2 && !(m = m_pullup(m, 2)))
1157 LEAVE(ENOBUFS);
1158 if (mtod(m, u_char *)[0] == 0xff &&
1159 mtod(m, u_char *)[1] == 0x03)
1160 m_adj(m, 2);
1161 }
1162 /*
1163 * Bang in a pre-made header, and set the length up
1164 * to be correct. Then send it to the ethernet driver.
1165 */
1166 M_PREPEND(m, sizeof(*wh), M_DONTWAIT);
1167 if (m == NULL)
1168 LEAVE(ENOBUFS);
1169
1170 wh = mtod(m, struct pppoe_full_hdr *);
1171 bcopy(&sp->pkt_hdr, wh, sizeof(*wh));
1172 wh->ph.length = htons(m->m_pkthdr.len - sizeof(*wh));
1173 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m);
1174 privp->packets_out++;
1175 break;
1176 }
1177 case PPPOE_PRIMED: {
1178 struct {
1179 struct pppoe_tag hdr;
1180 union uniq data;
1181 } __packed uniqtag;
1182 const struct pppoe_tag *tag;
1183 struct mbuf *m0;
1184 const struct pppoe_hdr *ph;
1185 negp neg = sp->neg;
1186 uint16_t session;
1187 uint16_t length;
1188 uint8_t code;
1189
1190 /*
1191 * A PADI packet is being returned by the application
1192 * that has set up this hook. This indicates that it
1193 * wants us to offer service.
1194 */
1195 if (m->m_len < sizeof(*wh)) {
1196 m = m_pullup(m, sizeof(*wh));
1197 if (m == NULL)
1198 LEAVE(ENOBUFS);
1199 }
1200 wh = mtod(m, struct pppoe_full_hdr *);
1201 ph = &wh->ph;
1202 session = ntohs(wh->ph.sid);
1203 length = ntohs(wh->ph.length);
1204 code = wh->ph.code;
1205 /* Use peers mode in session. */
1206 neg->pkt->pkt_header.eh.ether_type = wh->eh.ether_type;
1207 if (code != PADI_CODE)
1208 LEAVE(EINVAL);
1209 ng_uncallout(&neg->handle, node);
1210
1211 /*
1212 * This is the first time we hear
1213 * from the client, so note it's
1214 * unicast address, replacing the
1215 * broadcast address.
1216 */
1217 bcopy(wh->eh.ether_shost,
1218 neg->pkt->pkt_header.eh.ether_dhost,
1219 ETHER_ADDR_LEN);
1220 sp->state = PPPOE_SOFFER;
1221 neg->timeout = 0;
1222 neg->pkt->pkt_header.ph.code = PADO_CODE;
1223
1224 /*
1225 * Start working out the tags to respond with.
1226 */
1227 uniqtag.hdr.tag_type = PTT_AC_COOKIE;
1228 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(sp));
1229 uniqtag.data.pointer = sp;
1230 init_tags(sp);
1231 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
1232 if ((tag = get_tag(ph, PTT_SRV_NAME)))
1233 insert_tag(sp, tag); /* return service */
1234 /*
1235 * If we have a NULL service request
1236 * and have an extra service defined in this hook,
1237 * then also add a tag for the extra service.
1238 * XXX this is a hack. eventually we should be able
1239 * to support advertising many services, not just one
1240 */
1241 if (((tag == NULL) || (tag->tag_len == 0)) &&
1242 (neg->service.hdr.tag_len != 0)) {
1243 insert_tag(sp, &neg->service.hdr); /* SERVICE */
1244 }
1245 if ((tag = get_tag(ph, PTT_HOST_UNIQ)))
1246 insert_tag(sp, tag); /* returned hostunique */
1247 insert_tag(sp, &uniqtag.hdr);
1248 scan_tags(sp, ph);
1249 make_packet(sp);
1250 /*
1251 * Send the offer but if they don't respond
1252 * in PPPOE_OFFER_TIMEOUT seconds, forget about it.
1253 */
1254 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz,
1255 pppoe_ticker, NULL, 0);
1256 m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
1257 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1258 privp->packets_out++;
1259 break;
1260 }
1261
1262 /*
1263 * Packets coming from the hook make no sense
1264 * to sessions in the rest of states. Throw them away.
1265 */
1266 default:
1267 LEAVE(ENETUNREACH);
1268 }
1269 quit:
1270 if (item)
1271 NG_FREE_ITEM(item);
1272 NG_FREE_M(m);
1273 return (error);
1274 }
1275
1276 /*
1277 * Receive data from ether and do something with it.
1278 */
1279 static int
1280 ng_pppoe_rcvdata_ether(hook_p hook, item_p item)
1281 {
1282 node_p node = NG_HOOK_NODE(hook);
1283 const priv_p privp = NG_NODE_PRIVATE(node);
1284 sessp sp = NG_HOOK_PRIVATE(hook);
1285 const struct pppoe_tag *utag = NULL, *tag = NULL;
1286 const struct pppoe_full_hdr *wh;
1287 const struct pppoe_hdr *ph;
1288 negp neg = NULL;
1289 struct mbuf *m;
1290 hook_p sendhook;
1291 int error = 0;
1292 uint16_t session;
1293 uint16_t length;
1294 uint8_t code;
1295 struct mbuf *m0;
1296
1297 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1298 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1299
1300 NGI_GET_M(item, m);
1301 /*
1302 * Dig out various fields from the packet.
1303 * Use them to decide where to send it.
1304 */
1305 privp->packets_in++;
1306 if( m->m_len < sizeof(*wh)) {
1307 m = m_pullup(m, sizeof(*wh)); /* Checks length */
1308 if (m == NULL) {
1309 log(LOG_NOTICE, "ng_pppoe[%x]: couldn't "
1310 "m_pullup(wh)\n", node->nd_ID);
1311 LEAVE(ENOBUFS);
1312 }
1313 }
1314 wh = mtod(m, struct pppoe_full_hdr *);
1315 length = ntohs(wh->ph.length);
1316 switch(wh->eh.ether_type) {
1317 case ETHERTYPE_PPPOE_3COM_DISC: /* fall through */
1318 case ETHERTYPE_PPPOE_DISC:
1319 /*
1320 * We need to try to make sure that the tag area
1321 * is contiguous, or we could wander off the end
1322 * of a buffer and make a mess.
1323 * (Linux wouldn't have this problem).
1324 */
1325 if (m->m_pkthdr.len <= MHLEN) {
1326 if( m->m_len < m->m_pkthdr.len) {
1327 m = m_pullup(m, m->m_pkthdr.len);
1328 if (m == NULL) {
1329 log(LOG_NOTICE, "ng_pppoe[%x]: "
1330 "couldn't m_pullup(pkthdr)\n",
1331 node->nd_ID);
1332 LEAVE(ENOBUFS);
1333 }
1334 }
1335 }
1336 if (m->m_len != m->m_pkthdr.len) {
1337 /*
1338 * It's not all in one piece.
1339 * We need to do extra work.
1340 * Put it into a cluster.
1341 */
1342 struct mbuf *n;
1343 n = m_dup(m, M_DONTWAIT);
1344 m_freem(m);
1345 m = n;
1346 if (m) {
1347 /* just check we got a cluster */
1348 if (m->m_len != m->m_pkthdr.len) {
1349 m_freem(m);
1350 m = NULL;
1351 }
1352 }
1353 if (m == NULL) {
1354 log(LOG_NOTICE, "ng_pppoe[%x]: packet "
1355 "fragmented\n", node->nd_ID);
1356 LEAVE(EMSGSIZE);
1357 }
1358 }
1359 wh = mtod(m, struct pppoe_full_hdr *);
1360 length = ntohs(wh->ph.length);
1361 ph = &wh->ph;
1362 session = ntohs(wh->ph.sid);
1363 code = wh->ph.code;
1364
1365 switch(code) {
1366 case PADI_CODE:
1367 /*
1368 * We are a server:
1369 * Look for a hook with the required service and send
1370 * the ENTIRE packet up there. It should come back to
1371 * a new hook in PRIMED state. Look there for further
1372 * processing.
1373 */
1374 tag = get_tag(ph, PTT_SRV_NAME);
1375 if (tag == NULL) {
1376 CTR1(KTR_NET, "%20s: PADI w/o Service-Name",
1377 __func__);
1378 LEAVE(ENETUNREACH);
1379 }
1380
1381 /*
1382 * First, try to match Service-Name against our
1383 * listening hooks. If no success and we are in D-Link
1384 * compat mode and Service-Name is empty, then we
1385 * broadcast the PADI to all listening hooks.
1386 */
1387 sendhook = pppoe_match_svc(node, tag);
1388 if (sendhook != NULL)
1389 NG_FWD_NEW_DATA(error, item, sendhook, m);
1390 else if (privp->flags & COMPAT_DLINK &&
1391 ntohs(tag->tag_len) == 0)
1392 error = pppoe_broadcast_padi(node, m);
1393 else
1394 error = ENETUNREACH;
1395 break;
1396 case PADO_CODE:
1397 /*
1398 * We are a client:
1399 * Use the host_uniq tag to find the hook this is in
1400 * response to. Received #2, now send #3
1401 * For now simply accept the first we receive.
1402 */
1403 utag = get_tag(ph, PTT_HOST_UNIQ);
1404 if ((utag == NULL) ||
1405 (ntohs(utag->tag_len) != sizeof(sp))) {
1406 log(LOG_NOTICE, "ng_pppoe[%x]: no host "
1407 "unique field\n", node->nd_ID);
1408 LEAVE(ENETUNREACH);
1409 }
1410
1411 sendhook = pppoe_finduniq(node, utag);
1412 if (sendhook == NULL) {
1413 log(LOG_NOTICE, "ng_pppoe[%x]: no "
1414 "matching session\n", node->nd_ID);
1415 LEAVE(ENETUNREACH);
1416 }
1417
1418 /*
1419 * Check the session is in the right state.
1420 * It needs to be in PPPOE_SINIT.
1421 */
1422 sp = NG_HOOK_PRIVATE(sendhook);
1423 if (sp->state == PPPOE_SREQ ||
1424 sp->state == PPPOE_CONNECTED) {
1425 break; /* Multiple PADO is OK. */
1426 }
1427 if (sp->state != PPPOE_SINIT) {
1428 log(LOG_NOTICE, "ng_pppoe[%x]: session "
1429 "in wrong state\n", node->nd_ID);
1430 LEAVE(ENETUNREACH);
1431 }
1432 neg = sp->neg;
1433 /* If requested specific AC-name, check it. */
1434 if (neg->ac_name_len) {
1435 tag = get_tag(ph, PTT_AC_NAME);
1436 if (!tag) {
1437 /* No PTT_AC_NAME in PADO */
1438 break;
1439 }
1440 if (neg->ac_name_len != htons(tag->tag_len) ||
1441 strncmp(neg->ac_name.data, tag->tag_data,
1442 neg->ac_name_len) != 0) {
1443 break;
1444 }
1445 }
1446 sp->state = PPPOE_SREQ;
1447 ng_uncallout(&neg->handle, node);
1448
1449 /*
1450 * This is the first time we hear
1451 * from the server, so note it's
1452 * unicast address, replacing the
1453 * broadcast address .
1454 */
1455 bcopy(wh->eh.ether_shost,
1456 neg->pkt->pkt_header.eh.ether_dhost,
1457 ETHER_ADDR_LEN);
1458 neg->timeout = 0;
1459 neg->pkt->pkt_header.ph.code = PADR_CODE;
1460 init_tags(sp);
1461 insert_tag(sp, utag); /* Host Unique */
1462 if ((tag = get_tag(ph, PTT_AC_COOKIE)))
1463 insert_tag(sp, tag); /* return cookie */
1464 if ((tag = get_tag(ph, PTT_AC_NAME))) {
1465 insert_tag(sp, tag); /* return it */
1466 send_acname(sp, tag);
1467 }
1468 insert_tag(sp, &neg->service.hdr); /* Service */
1469 scan_tags(sp, ph);
1470 make_packet(sp);
1471 sp->state = PPPOE_SREQ;
1472 ng_callout(&neg->handle, node, sp->hook,
1473 PPPOE_INITIAL_TIMEOUT * hz,
1474 pppoe_ticker, NULL, 0);
1475 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2;
1476 m0 = m_copypacket(neg->m, M_DONTWAIT);
1477 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1478 break;
1479 case PADR_CODE:
1480 /*
1481 * We are a server:
1482 * Use the ac_cookie tag to find the
1483 * hook this is in response to.
1484 */
1485 utag = get_tag(ph, PTT_AC_COOKIE);
1486 if ((utag == NULL) ||
1487 (ntohs(utag->tag_len) != sizeof(sp))) {
1488 LEAVE(ENETUNREACH);
1489 }
1490
1491 sendhook = pppoe_finduniq(node, utag);
1492 if (sendhook == NULL)
1493 LEAVE(ENETUNREACH);
1494
1495 /*
1496 * Check the session is in the right state.
1497 * It needs to be in PPPOE_SOFFER or PPPOE_NEWCONNECTED.
1498 * If the latter, then this is a retry by the client,
1499 * so be nice, and resend.
1500 */
1501 sp = NG_HOOK_PRIVATE(sendhook);
1502 if (sp->state == PPPOE_NEWCONNECTED) {
1503 /*
1504 * Whoa! drop back to resend that PADS packet.
1505 * We should still have a copy of it.
1506 */
1507 sp->state = PPPOE_SOFFER;
1508 } else if (sp->state != PPPOE_SOFFER)
1509 LEAVE (ENETUNREACH);
1510 neg = sp->neg;
1511 ng_uncallout(&neg->handle, node);
1512 neg->pkt->pkt_header.ph.code = PADS_CODE;
1513 if (sp->Session_ID == 0) {
1514 neg->pkt->pkt_header.ph.sid =
1515 htons(pppoe_getnewsession(sp));
1516 }
1517 send_sessionid(sp);
1518 neg->timeout = 0;
1519 /*
1520 * start working out the tags to respond with.
1521 */
1522 init_tags(sp);
1523 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
1524 if ((tag = get_tag(ph, PTT_SRV_NAME)))
1525 insert_tag(sp, tag);/* return service */
1526 if ((tag = get_tag(ph, PTT_HOST_UNIQ)))
1527 insert_tag(sp, tag); /* return it */
1528 insert_tag(sp, utag); /* ac_cookie */
1529 scan_tags(sp, ph);
1530 make_packet(sp);
1531 sp->state = PPPOE_NEWCONNECTED;
1532
1533 /* Send the PADS without a timeout - we're now connected. */
1534 m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
1535 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0);
1536
1537 /*
1538 * Having sent the last Negotiation header,
1539 * Set up the stored packet header to be correct for
1540 * the actual session. But keep the negotialtion stuff
1541 * around in case we need to resend this last packet.
1542 * We'll discard it when we move from NEWCONNECTED
1543 * to CONNECTED
1544 */
1545 sp->pkt_hdr = neg->pkt->pkt_header;
1546 /* Configure ethertype depending on what
1547 * ethertype was used at discovery phase */
1548 if (sp->pkt_hdr.eh.ether_type ==
1549 ETHERTYPE_PPPOE_3COM_DISC)
1550 sp->pkt_hdr.eh.ether_type
1551 = ETHERTYPE_PPPOE_3COM_SESS;
1552 else
1553 sp->pkt_hdr.eh.ether_type
1554 = ETHERTYPE_PPPOE_SESS;
1555 sp->pkt_hdr.ph.code = 0;
1556 pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
1557 break;
1558 case PADS_CODE:
1559 /*
1560 * We are a client:
1561 * Use the host_uniq tag to find the hook this is in
1562 * response to. Take the session ID and store it away.
1563 * Also make sure the pre-made header is correct and
1564 * set us into Session mode.
1565 */
1566 utag = get_tag(ph, PTT_HOST_UNIQ);
1567 if ((utag == NULL) ||
1568 (ntohs(utag->tag_len) != sizeof(sp))) {
1569 LEAVE (ENETUNREACH);
1570 }
1571 sendhook = pppoe_finduniq(node, utag);
1572 if (sendhook == NULL)
1573 LEAVE(ENETUNREACH);
1574
1575 /*
1576 * Check the session is in the right state.
1577 * It needs to be in PPPOE_SREQ.
1578 */
1579 sp = NG_HOOK_PRIVATE(sendhook);
1580 if (sp->state != PPPOE_SREQ)
1581 LEAVE(ENETUNREACH);
1582 neg = sp->neg;
1583 ng_uncallout(&neg->handle, node);
1584 neg->pkt->pkt_header.ph.sid = wh->ph.sid;
1585 sp->Session_ID = ntohs(wh->ph.sid);
1586 pppoe_addsession(sp);
1587 send_sessionid(sp);
1588 neg->timeout = 0;
1589 sp->state = PPPOE_CONNECTED;
1590 /*
1591 * Now we have gone to Connected mode,
1592 * Free all resources needed for negotiation.
1593 * Keep a copy of the header we will be using.
1594 */
1595 sp->pkt_hdr = neg->pkt->pkt_header;
1596 if (privp->flags & COMPAT_3COM)
1597 sp->pkt_hdr.eh.ether_type
1598 = ETHERTYPE_PPPOE_3COM_SESS;
1599 else
1600 sp->pkt_hdr.eh.ether_type
1601 = ETHERTYPE_PPPOE_SESS;
1602 sp->pkt_hdr.ph.code = 0;
1603 m_freem(neg->m);
1604 free(sp->neg, M_NETGRAPH_PPPOE);
1605 sp->neg = NULL;
1606 pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
1607 break;
1608 case PADT_CODE:
1609 /*
1610 * Find matching peer/session combination.
1611 */
1612 sp = pppoe_findsession(privp, wh);
1613 if (sp == NULL)
1614 LEAVE(ENETUNREACH);
1615 /* Disconnect that hook. */
1616 ng_rmhook_self(sp->hook);
1617 break;
1618 default:
1619 LEAVE(EPFNOSUPPORT);
1620 }
1621 break;
1622 case ETHERTYPE_PPPOE_3COM_SESS:
1623 case ETHERTYPE_PPPOE_SESS:
1624 /*
1625 * Find matching peer/session combination.
1626 */
1627 sp = pppoe_findsession(privp, wh);
1628 if (sp == NULL)
1629 LEAVE (ENETUNREACH);
1630 m_adj(m, sizeof(*wh));
1631
1632 /* If packet too short, dump it. */
1633 if (m->m_pkthdr.len < length)
1634 LEAVE(EMSGSIZE);
1635 /* Also need to trim excess at the end */
1636 if (m->m_pkthdr.len > length) {
1637 m_adj(m, -((int)(m->m_pkthdr.len - length)));
1638 }
1639 if ( sp->state != PPPOE_CONNECTED) {
1640 if (sp->state == PPPOE_NEWCONNECTED) {
1641 sp->state = PPPOE_CONNECTED;
1642 /*
1643 * Now we have gone to Connected mode,
1644 * Free all resources needed for negotiation.
1645 * Be paranoid about whether there may be
1646 * a timeout.
1647 */
1648 m_freem(sp->neg->m);
1649 ng_uncallout(&sp->neg->handle, node);
1650 free(sp->neg, M_NETGRAPH_PPPOE);
1651 sp->neg = NULL;
1652 } else {
1653 LEAVE (ENETUNREACH);
1654 }
1655 }
1656 NG_FWD_NEW_DATA(error, item, sp->hook, m);
1657 break;
1658 default:
1659 LEAVE(EPFNOSUPPORT);
1660 }
1661 quit:
1662 if (item)
1663 NG_FREE_ITEM(item);
1664 NG_FREE_M(m);
1665 return (error);
1666 }
1667
1668 /*
1669 * Receive data from debug hook and bypass it to ether.
1670 */
1671 static int
1672 ng_pppoe_rcvdata_debug(hook_p hook, item_p item)
1673 {
1674 node_p node = NG_HOOK_NODE(hook);
1675 const priv_p privp = NG_NODE_PRIVATE(node);
1676 int error;
1677
1678 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1679 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1680
1681 NG_FWD_ITEM_HOOK(error, item, privp->ethernet_hook);
1682 privp->packets_out++;
1683 return (error);
1684 }
1685
1686 /*
1687 * Do local shutdown processing..
1688 * If we are a persistant device, we might refuse to go away, and
1689 * we'd only remove our links and reset ourself.
1690 */
1691 static int
1692 ng_pppoe_shutdown(node_p node)
1693 {
1694 const priv_p privp = NG_NODE_PRIVATE(node);
1695 int i;
1696
1697 for (i = 0; i < SESSHASHSIZE; i++)
1698 mtx_destroy(&privp->sesshash[i].mtx);
1699 NG_NODE_SET_PRIVATE(node, NULL);
1700 NG_NODE_UNREF(privp->node);
1701 free(privp, M_NETGRAPH_PPPOE);
1702 return (0);
1703 }
1704
1705 /*
1706 * Hook disconnection
1707 *
1708 * Clean up all dangling links and information about the session/hook.
1709 * For this type, removal of the last link destroys the node.
1710 */
1711 static int
1712 ng_pppoe_disconnect(hook_p hook)
1713 {
1714 node_p node = NG_HOOK_NODE(hook);
1715 priv_p privp = NG_NODE_PRIVATE(node);
1716 sessp sp;
1717
1718 if (hook == privp->debug_hook) {
1719 privp->debug_hook = NULL;
1720 } else if (hook == privp->ethernet_hook) {
1721 privp->ethernet_hook = NULL;
1722 if (NG_NODE_IS_VALID(node))
1723 ng_rmnode_self(node);
1724 } else {
1725 sp = NG_HOOK_PRIVATE(hook);
1726 if (sp->state != PPPOE_SNONE ) {
1727 pppoe_send_event(sp, NGM_PPPOE_CLOSE);
1728 }
1729 /*
1730 * According to the spec, if we are connected,
1731 * we should send a DISC packet if we are shutting down
1732 * a session.
1733 */
1734 if ((privp->ethernet_hook)
1735 && ((sp->state == PPPOE_CONNECTED)
1736 || (sp->state == PPPOE_NEWCONNECTED))) {
1737 struct mbuf *m;
1738
1739 /* Generate a packet of that type. */
1740 MGETHDR(m, M_DONTWAIT, MT_DATA);
1741 if (m == NULL)
1742 log(LOG_NOTICE, "ng_pppoe[%x]: session out of "
1743 "mbufs\n", node->nd_ID);
1744 else {
1745 struct pppoe_full_hdr *wh;
1746 struct pppoe_tag *tag;
1747 int msglen = strlen(SIGNOFF);
1748 int error = 0;
1749
1750 m->m_pkthdr.rcvif = NULL;
1751 m->m_pkthdr.len = m->m_len = sizeof(*wh);
1752 wh = mtod(m, struct pppoe_full_hdr *);
1753 bcopy(&sp->pkt_hdr, wh, sizeof(*wh));
1754
1755 /* Revert the stored header to DISC/PADT mode. */
1756 wh->ph.code = PADT_CODE;
1757 /*
1758 * Configure ethertype depending on what
1759 * was used during sessions stage.
1760 */
1761 if (wh->eh.ether_type ==
1762 ETHERTYPE_PPPOE_3COM_SESS)
1763 wh->eh.ether_type = ETHERTYPE_PPPOE_3COM_DISC;
1764 else
1765 wh->eh.ether_type = ETHERTYPE_PPPOE_DISC;
1766 /*
1767 * Add a General error message and adjust
1768 * sizes.
1769 */
1770 tag = wh->ph.tag;
1771 tag->tag_type = PTT_GEN_ERR;
1772 tag->tag_len = htons((u_int16_t)msglen);
1773 strncpy(tag->tag_data, SIGNOFF, msglen);
1774 m->m_pkthdr.len = (m->m_len += sizeof(*tag) +
1775 msglen);
1776 wh->ph.length = htons(sizeof(*tag) + msglen);
1777 NG_SEND_DATA_ONLY(error,
1778 privp->ethernet_hook, m);
1779 }
1780 }
1781 if (sp->state == PPPOE_LISTENING)
1782 LIST_REMOVE(sp, sessions);
1783 else if (sp->Session_ID)
1784 pppoe_delsession(sp);
1785 /*
1786 * As long as we have somewhere to store the timeout handle,
1787 * we may have a timeout pending.. get rid of it.
1788 */
1789 if (sp->neg) {
1790 ng_uncallout(&sp->neg->handle, node);
1791 if (sp->neg->m)
1792 m_freem(sp->neg->m);
1793 free(sp->neg, M_NETGRAPH_PPPOE);
1794 }
1795 free(sp, M_NETGRAPH_PPPOE);
1796 NG_HOOK_SET_PRIVATE(hook, NULL);
1797 }
1798 if ((NG_NODE_NUMHOOKS(node) == 0) &&
1799 (NG_NODE_IS_VALID(node)))
1800 ng_rmnode_self(node);
1801 return (0);
1802 }
1803
1804 /*
1805 * Timeouts come here.
1806 */
1807 static void
1808 pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2)
1809 {
1810 priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
1811 sessp sp = NG_HOOK_PRIVATE(hook);
1812 negp neg = sp->neg;
1813 struct mbuf *m0 = NULL;
1814 int error = 0;
1815
1816 CTR6(KTR_NET, "%20s: node [%x] (%p) hook \"%s\" (%p) session %d",
1817 __func__, node->nd_ID, node, hook->hk_name, hook, sp->Session_ID);
1818 switch(sp->state) {
1819 /*
1820 * Resend the last packet, using an exponential backoff.
1821 * After a period of time, stop growing the backoff,
1822 * And either leave it, or revert to the start.
1823 */
1824 case PPPOE_SINIT:
1825 case PPPOE_SREQ:
1826 /* Timeouts on these produce resends. */
1827 m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
1828 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0);
1829 ng_callout(&neg->handle, node, hook, neg->timeout * hz,
1830 pppoe_ticker, NULL, 0);
1831 if ((neg->timeout <<= 1) > PPPOE_TIMEOUT_LIMIT) {
1832 if (sp->state == PPPOE_SREQ) {
1833 /* Revert to SINIT mode. */
1834 pppoe_start(sp);
1835 } else {
1836 neg->timeout = PPPOE_TIMEOUT_LIMIT;
1837 }
1838 }
1839 break;
1840 case PPPOE_PRIMED:
1841 case PPPOE_SOFFER:
1842 /* A timeout on these says "give up" */
1843 ng_rmhook_self(hook);
1844 break;
1845 default:
1846 /* Timeouts have no meaning in other states. */
1847 log(LOG_NOTICE, "ng_pppoe[%x]: unexpected timeout\n",
1848 node->nd_ID);
1849 }
1850 }
1851
1852 /*
1853 * Parse an incoming packet to see if any tags should be copied to the
1854 * output packet. Don't do any tags that have been handled in the main
1855 * state machine.
1856 */
1857 static const struct pppoe_tag*
1858 scan_tags(sessp sp, const struct pppoe_hdr* ph)
1859 {
1860 const char *const end = (const char *)next_tag(ph);
1861 const char *ptn;
1862 const struct pppoe_tag *pt = &ph->tag[0];
1863
1864 /*
1865 * Keep processing tags while a tag header will still fit.
1866 */
1867 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1868
1869 while((const char*)(pt + 1) <= end) {
1870 /*
1871 * If the tag data would go past the end of the packet, abort.
1872 */
1873 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len));
1874 if(ptn > end)
1875 return NULL;
1876
1877 switch (pt->tag_type) {
1878 case PTT_RELAY_SID:
1879 insert_tag(sp, pt);
1880 break;
1881 case PTT_EOL:
1882 return NULL;
1883 case PTT_SRV_NAME:
1884 case PTT_AC_NAME:
1885 case PTT_HOST_UNIQ:
1886 case PTT_AC_COOKIE:
1887 case PTT_VENDOR:
1888 case PTT_SRV_ERR:
1889 case PTT_SYS_ERR:
1890 case PTT_GEN_ERR:
1891 break;
1892 }
1893 pt = (const struct pppoe_tag*)ptn;
1894 }
1895 return NULL;
1896 }
1897
1898 static int
1899 pppoe_send_event(sessp sp, enum cmd cmdid)
1900 {
1901 int error;
1902 struct ng_mesg *msg;
1903 struct ngpppoe_sts *sts;
1904
1905 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1906
1907 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, cmdid,
1908 sizeof(struct ngpppoe_sts), M_NOWAIT);
1909 if (msg == NULL)
1910 return (ENOMEM);
1911 sts = (struct ngpppoe_sts *)msg->data;
1912 strncpy(sts->hook, NG_HOOK_NAME(sp->hook), NG_HOOKSIZ);
1913 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1914 return (error);
1915 }
DragonFly BSD