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: releng/6.2/sys/netgraph/ng_pppoe.c 161881 2006-09-02 12:38:26Z glebius $
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 #define OFFSETOF(s, e) ((char *)&((s *)0)->e - (char *)((s *)0))
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_disconnect_t ng_pppoe_disconnect;
81
82 /* Parse type for struct ngpppoe_init_data */
83 static const struct ng_parse_struct_field ngpppoe_init_data_type_fields[]
84 = NG_PPPOE_INIT_DATA_TYPE_INFO;
85 static const struct ng_parse_type ngpppoe_init_data_state_type = {
86 &ng_parse_struct_type,
87 &ngpppoe_init_data_type_fields
88 };
89
90 /* Parse type for struct ngpppoe_sts */
91 static const struct ng_parse_struct_field ng_pppoe_sts_type_fields[]
92 = NG_PPPOE_STS_TYPE_INFO;
93 static const struct ng_parse_type ng_pppoe_sts_state_type = {
94 &ng_parse_struct_type,
95 &ng_pppoe_sts_type_fields
96 };
97
98 /* List of commands and how to convert arguments to/from ASCII */
99 static const struct ng_cmdlist ng_pppoe_cmds[] = {
100 {
101 NGM_PPPOE_COOKIE,
102 NGM_PPPOE_CONNECT,
103 "pppoe_connect",
104 &ngpppoe_init_data_state_type,
105 NULL
106 },
107 {
108 NGM_PPPOE_COOKIE,
109 NGM_PPPOE_LISTEN,
110 "pppoe_listen",
111 &ngpppoe_init_data_state_type,
112 NULL
113 },
114 {
115 NGM_PPPOE_COOKIE,
116 NGM_PPPOE_OFFER,
117 "pppoe_offer",
118 &ngpppoe_init_data_state_type,
119 NULL
120 },
121 {
122 NGM_PPPOE_COOKIE,
123 NGM_PPPOE_SERVICE,
124 "pppoe_service",
125 &ngpppoe_init_data_state_type,
126 NULL
127 },
128 {
129 NGM_PPPOE_COOKIE,
130 NGM_PPPOE_SUCCESS,
131 "pppoe_success",
132 &ng_pppoe_sts_state_type,
133 NULL
134 },
135 {
136 NGM_PPPOE_COOKIE,
137 NGM_PPPOE_FAIL,
138 "pppoe_fail",
139 &ng_pppoe_sts_state_type,
140 NULL
141 },
142 {
143 NGM_PPPOE_COOKIE,
144 NGM_PPPOE_CLOSE,
145 "pppoe_close",
146 &ng_pppoe_sts_state_type,
147 NULL
148 },
149 {
150 NGM_PPPOE_COOKIE,
151 NGM_PPPOE_SETMODE,
152 "pppoe_setmode",
153 &ng_parse_string_type,
154 NULL
155 },
156 {
157 NGM_PPPOE_COOKIE,
158 NGM_PPPOE_GETMODE,
159 "pppoe_getmode",
160 NULL,
161 &ng_parse_string_type
162 },
163 {
164 NGM_PPPOE_COOKIE,
165 NGM_PPPOE_SETENADDR,
166 "setenaddr",
167 &ng_parse_enaddr_type,
168 NULL
169 },
170 { 0 }
171 };
172
173 /* Netgraph node type descriptor */
174 static struct ng_type typestruct = {
175 .version = NG_ABI_VERSION,
176 .name = NG_PPPOE_NODE_TYPE,
177 .constructor = ng_pppoe_constructor,
178 .rcvmsg = ng_pppoe_rcvmsg,
179 .shutdown = ng_pppoe_shutdown,
180 .newhook = ng_pppoe_newhook,
181 .connect = ng_pppoe_connect,
182 .rcvdata = ng_pppoe_rcvdata,
183 .disconnect = ng_pppoe_disconnect,
184 .cmdlist = ng_pppoe_cmds,
185 };
186 NETGRAPH_INIT(pppoe, &typestruct);
187
188 /*
189 * States for the session state machine.
190 * These have no meaning if there is no hook attached yet.
191 */
192 enum state {
193 PPPOE_SNONE=0, /* [both] Initial state */
194 PPPOE_LISTENING, /* [Daemon] Listening for discover initiation pkt */
195 PPPOE_SINIT, /* [Client] Sent discovery initiation */
196 PPPOE_PRIMED, /* [Server] Awaiting PADI from daemon */
197 PPPOE_SOFFER, /* [Server] Sent offer message (got PADI)*/
198 PPPOE_SREQ, /* [Client] Sent a Request */
199 PPPOE_NEWCONNECTED, /* [Server] Connection established, No data received */
200 PPPOE_CONNECTED, /* [Both] Connection established, Data received */
201 PPPOE_DEAD /* [Both] */
202 };
203
204 #define NUMTAGS 20 /* number of tags we are set up to work with */
205
206 /*
207 * Information we store for each hook on each node for negotiating the
208 * session. The mbuf and cluster are freed once negotiation has completed.
209 * The whole negotiation block is then discarded.
210 */
211
212 struct sess_neg {
213 struct mbuf *m; /* holds cluster with last sent packet */
214 union packet *pkt; /* points within the above cluster */
215 struct callout handle; /* see timeout(9) */
216 u_int timeout; /* 0,1,2,4,8,16 etc. seconds */
217 u_int numtags;
218 const struct pppoe_tag *tags[NUMTAGS];
219 u_int service_len;
220 u_int ac_name_len;
221
222 struct datatag service;
223 struct datatag ac_name;
224 };
225 typedef struct sess_neg *negp;
226
227 /*
228 * Session information that is needed after connection.
229 */
230 struct sess_con {
231 hook_p hook;
232 uint16_t Session_ID;
233 enum state state;
234 ng_ID_t creator; /* who to notify */
235 struct pppoe_full_hdr pkt_hdr; /* used when connected */
236 negp neg; /* used when negotiating */
237 };
238 typedef struct sess_con *sessp;
239
240 #define NG_PPPOE_SESSION_NODE(sp) NG_HOOK_NODE(sp->hook)
241
242 /*
243 * Information we store for each node
244 */
245 struct PPPoE {
246 node_p node; /* back pointer to node */
247 hook_p ethernet_hook;
248 hook_p debug_hook;
249 u_int packets_in; /* packets in from ethernet */
250 u_int packets_out; /* packets out towards ethernet */
251 uint32_t flags;
252 #define COMPAT_3COM 0x00000001
253 #define COMPAT_DLINK 0x00000002
254 struct ether_header eh;
255 };
256 typedef struct PPPoE *priv_p;
257
258 union uniq {
259 char bytes[sizeof(void *)];
260 void *pointer;
261 };
262
263 #define LEAVE(x) do { error = x; goto quit; } while(0)
264 static void pppoe_start(sessp sp);
265 static void ng_pppoe_sendpacket(sessp sp);
266 static void pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2);
267 static const struct pppoe_tag *scan_tags(sessp sp,
268 const struct pppoe_hdr* ph);
269 static int pppoe_send_event(sessp sp, enum cmd cmdid);
270
271 /*************************************************************************
272 * Some basic utilities from the Linux version with author's permission.*
273 * Author: Michal Ostrowski <mostrows@styx.uwaterloo.ca> *
274 ************************************************************************/
275
276 /*
277 * Generate a new session id
278 * XXX find out the FreeBSD locking scheme.
279 */
280 static uint16_t
281 get_new_sid(node_p node)
282 {
283 priv_p privp = NG_NODE_PRIVATE(node);
284 static int pppoe_sid = 10;
285 sessp sp;
286 hook_p hook;
287 uint16_t val;
288
289 restart:
290 val = pppoe_sid++;
291 /*
292 * Spec says 0xFFFF is reserved.
293 * Also don't use 0x0000
294 */
295 if (val == 0xffff) {
296 pppoe_sid = 20;
297 goto restart;
298 }
299
300 /* Check it isn't already in use. */
301 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
302 /* Don't check special hooks. */
303 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook)
304 || (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook))
305 continue;
306 sp = NG_HOOK_PRIVATE(hook);
307 if (sp->Session_ID == val)
308 goto restart;
309 }
310
311 CTR2(KTR_NET, "%20s: new sid %d", __func__, val);
312
313 return (val);
314 }
315
316
317 /*
318 * Return the location where the next tag can be put
319 */
320 static __inline const struct pppoe_tag*
321 next_tag(const struct pppoe_hdr* ph)
322 {
323 return (const struct pppoe_tag*)(((const char*)&ph->tag[0])
324 + ntohs(ph->length));
325 }
326
327 /*
328 * Look for a tag of a specific type.
329 * Don't trust any length the other end says,
330 * but assume we already sanity checked ph->length.
331 */
332 static const struct pppoe_tag*
333 get_tag(const struct pppoe_hdr* ph, uint16_t idx)
334 {
335 const char *const end = (const char *)next_tag(ph);
336 const struct pppoe_tag *pt = &ph->tag[0];
337 const char *ptn;
338
339 /*
340 * Keep processing tags while a tag header will still fit.
341 */
342 while((const char*)(pt + 1) <= end) {
343 /*
344 * If the tag data would go past the end of the packet, abort.
345 */
346 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len));
347 if (ptn > end) {
348 CTR2(KTR_NET, "%20s: invalid length for tag %d",
349 __func__, idx);
350 return (NULL);
351 }
352 if (pt->tag_type == idx) {
353 CTR2(KTR_NET, "%20s: found tag %d", __func__, idx);
354 return (pt);
355 }
356
357 pt = (const struct pppoe_tag*)ptn;
358 }
359
360 CTR2(KTR_NET, "%20s: not found tag %d", __func__, idx);
361 return (NULL);
362 }
363
364 /**************************************************************************
365 * Inlines to initialise or add tags to a session's tag list.
366 **************************************************************************/
367 /*
368 * Initialise the session's tag list.
369 */
370 static void
371 init_tags(sessp sp)
372 {
373 KASSERT(sp->neg != NULL, ("%s: no neg", __func__));
374 sp->neg->numtags = 0;
375 }
376
377 static void
378 insert_tag(sessp sp, const struct pppoe_tag *tp)
379 {
380 negp neg = sp->neg;
381 int i;
382
383 KASSERT(neg != NULL, ("%s: no neg", __func__));
384 if ((i = neg->numtags++) < NUMTAGS) {
385 neg->tags[i] = tp;
386 } else {
387 log(LOG_NOTICE, "ng_pppoe: asked to add too many tags to "
388 "packet\n");
389 neg->numtags--;
390 }
391 }
392
393 /*
394 * Make up a packet, using the tags filled out for the session.
395 *
396 * Assume that the actual pppoe header and ethernet header
397 * are filled out externally to this routine.
398 * Also assume that neg->wh points to the correct
399 * location at the front of the buffer space.
400 */
401 static void
402 make_packet(sessp sp) {
403 struct pppoe_full_hdr *wh = &sp->neg->pkt->pkt_header;
404 const struct pppoe_tag **tag;
405 char *dp;
406 int count;
407 int tlen;
408 uint16_t length = 0;
409
410 KASSERT((sp->neg != NULL) && (sp->neg->m != NULL),
411 ("%s: called from wrong state", __func__));
412 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
413
414 dp = (char *)wh->ph.tag;
415 for (count = 0, tag = sp->neg->tags;
416 ((count < sp->neg->numtags) && (count < NUMTAGS));
417 tag++, count++) {
418 tlen = ntohs((*tag)->tag_len) + sizeof(**tag);
419 if ((length + tlen) > (ETHER_MAX_LEN - 4 - sizeof(*wh))) {
420 log(LOG_NOTICE, "ng_pppoe: tags too long\n");
421 sp->neg->numtags = count;
422 break; /* XXX chop off what's too long */
423 }
424 bcopy(*tag, (char *)dp, tlen);
425 length += tlen;
426 dp += tlen;
427 }
428 wh->ph.length = htons(length);
429 sp->neg->m->m_len = length + sizeof(*wh);
430 sp->neg->m->m_pkthdr.len = length + sizeof(*wh);
431 }
432
433 /**************************************************************************
434 * Routines to match a service. *
435 **************************************************************************/
436
437 /*
438 * Find a hook that has a service string that matches that
439 * we are seeking. For now use a simple string.
440 * In the future we may need something like regexp().
441 *
442 * Null string is a wildcard (ANY service), according to RFC2516.
443 * And historical FreeBSD wildcard is also "*".
444 */
445
446 static hook_p
447 pppoe_match_svc(node_p node, const struct pppoe_tag *tag)
448 {
449 priv_p privp = NG_NODE_PRIVATE(node);
450 hook_p hook;
451
452 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
453 sessp sp = NG_HOOK_PRIVATE(hook);
454 negp neg;
455
456 /* Skip any hook that is debug or ethernet. */
457 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) ||
458 (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook))
459 continue;
460
461 /* Skip any sessions which are not in LISTEN mode. */
462 if (sp->state != PPPOE_LISTENING)
463 continue;
464
465 neg = sp->neg;
466
467 /* Empty Service-Name matches any service. */
468 if (neg->service_len == 0)
469 break;
470
471 /* Special case for a blank or "*" service name (wildcard). */
472 if (neg->service_len == 1 && neg->service.data[0] == '*')
473 break;
474
475 /* If the lengths don't match, that aint it. */
476 if (neg->service_len != ntohs(tag->tag_len))
477 continue;
478
479 if (strncmp(tag->tag_data, neg->service.data,
480 ntohs(tag->tag_len)) == 0)
481 break;
482 }
483 CTR3(KTR_NET, "%20s: matched %p for %s", __func__, hook, tag->tag_data);
484
485 return (hook);
486 }
487
488 /*
489 * Broadcast the PADI packet in m0 to all listening hooks.
490 * This routine is called when a PADI with empty Service-Name
491 * tag is received. Client should receive PADOs with all
492 * available services.
493 */
494 static int
495 pppoe_broadcast_padi(node_p node, struct mbuf *m0)
496 {
497 priv_p privp = NG_NODE_PRIVATE(node);
498 hook_p hook;
499 int error = 0;
500
501 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
502 sessp sp = NG_HOOK_PRIVATE(hook);
503 struct mbuf *m;
504
505 /*
506 * Go through all listening hooks and
507 * broadcast the PADI packet up there
508 */
509 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) ||
510 (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook))
511 continue;
512
513 if (sp->state != PPPOE_LISTENING)
514 continue;
515
516 m = m_dup(m0, M_DONTWAIT);
517 if (m == NULL)
518 return (ENOMEM);
519 NG_SEND_DATA_ONLY(error, hook, m);
520 if (error)
521 return (error);
522 }
523
524 return (0);
525 }
526
527 /*
528 * Find a hook, which name equals to given service.
529 */
530 static hook_p
531 pppoe_find_svc(node_p node, const char *svc_name, int svc_len)
532 {
533 priv_p privp = NG_NODE_PRIVATE(node);
534 hook_p hook;
535
536 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
537 sessp sp = NG_HOOK_PRIVATE(hook);
538 negp neg;
539
540 /* Skip any hook that is debug or ethernet. */
541 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) ||
542 (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook))
543 continue;
544
545 /* Skip any sessions which are not in LISTEN mode. */
546 if (sp->state != PPPOE_LISTENING)
547 continue;
548
549 neg = sp->neg;
550
551 if (neg->service_len == svc_len &&
552 strncmp(svc_name, neg->service.data, svc_len == 0))
553 return (hook);
554 }
555
556 return (NULL);
557 }
558
559 /**************************************************************************
560 * Routine to find a particular session that matches an incoming packet. *
561 **************************************************************************/
562 static hook_p
563 pppoe_findsession(node_p node, const struct pppoe_full_hdr *wh)
564 {
565 priv_p privp = NG_NODE_PRIVATE(node);
566 sessp sp = NULL;
567 hook_p hook = NULL;
568 uint16_t session = ntohs(wh->ph.sid);
569
570 /*
571 * Find matching peer/session combination.
572 */
573 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
574 /* don't check special hooks */
575 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook)
576 || (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook)) {
577 continue;
578 }
579 sp = NG_HOOK_PRIVATE(hook);
580 if ( ( (sp->state == PPPOE_CONNECTED)
581 || (sp->state == PPPOE_NEWCONNECTED) )
582 && (sp->Session_ID == session)
583 && (bcmp(sp->pkt_hdr.eh.ether_dhost,
584 wh->eh.ether_shost,
585 ETHER_ADDR_LEN)) == 0) {
586 break;
587 }
588 }
589 CTR3(KTR_NET, "%20s: matched %p for %d", __func__, hook, session);
590
591 return (hook);
592 }
593
594 static hook_p
595 pppoe_finduniq(node_p node, const struct pppoe_tag *tag)
596 {
597 priv_p privp = NG_NODE_PRIVATE(node);
598 hook_p hook = NULL;
599 union uniq uniq;
600
601 bcopy(tag->tag_data, uniq.bytes, sizeof(void *));
602 /* Cycle through all known hooks. */
603 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
604 /* Don't check special hooks. */
605 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook)
606 || (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook))
607 continue;
608 if (uniq.pointer == NG_HOOK_PRIVATE(hook))
609 break;
610 }
611 CTR3(KTR_NET, "%20s: matched %p for %p", __func__, hook, uniq.pointer);
612
613 return (hook);
614 }
615
616 /**************************************************************************
617 * Start of Netgraph entrypoints. *
618 **************************************************************************/
619
620 /*
621 * Allocate the private data structure and link it with node.
622 */
623 static int
624 ng_pppoe_constructor(node_p node)
625 {
626 priv_p privp;
627
628 /* Initialize private descriptor. */
629 privp = malloc(sizeof(*privp), M_NETGRAPH_PPPOE, M_NOWAIT | M_ZERO);
630 if (privp == NULL)
631 return (ENOMEM);
632
633 /* Link structs together; this counts as our one reference to *node. */
634 NG_NODE_SET_PRIVATE(node, privp);
635 privp->node = node;
636
637 /* Initialize to standard mode. */
638 memset(&privp->eh.ether_dhost, 0xff, ETHER_ADDR_LEN);
639 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
640
641 CTR3(KTR_NET, "%20s: created node [%x] (%p)",
642 __func__, node->nd_ID, node);
643
644 return (0);
645 }
646
647 /*
648 * Give our ok for a hook to be added...
649 * point the hook's private info to the hook structure.
650 *
651 * The following hook names are special:
652 * "ethernet": the hook that should be connected to a NIC.
653 * "debug": copies of data sent out here (when I write the code).
654 * All other hook names need only be unique. (the framework checks this).
655 */
656 static int
657 ng_pppoe_newhook(node_p node, hook_p hook, const char *name)
658 {
659 const priv_p privp = NG_NODE_PRIVATE(node);
660 sessp sp;
661
662 if (strcmp(name, NG_PPPOE_HOOK_ETHERNET) == 0) {
663 privp->ethernet_hook = hook;
664 NG_HOOK_SET_PRIVATE(hook, &privp->ethernet_hook);
665 } else if (strcmp(name, NG_PPPOE_HOOK_DEBUG) == 0) {
666 privp->debug_hook = hook;
667 NG_HOOK_SET_PRIVATE(hook, &privp->debug_hook);
668 } else {
669 /*
670 * Any other unique name is OK.
671 * The infrastructure has already checked that it's unique,
672 * so just allocate it and hook it in.
673 */
674 sp = malloc(sizeof(*sp), M_NETGRAPH_PPPOE, M_NOWAIT | M_ZERO);
675 if (sp == NULL)
676 return (ENOMEM);
677
678 NG_HOOK_SET_PRIVATE(hook, sp);
679 sp->hook = hook;
680 }
681 CTR5(KTR_NET, "%20s: node [%x] (%p) connected hook %s (%p)",
682 __func__, node->nd_ID, node, name, hook);
683
684 return(0);
685 }
686
687 /*
688 * Hook has been added successfully. Request the MAC address of
689 * the underlying Ethernet node.
690 */
691 static int
692 ng_pppoe_connect(hook_p hook)
693 {
694 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
695 struct ng_mesg *msg;
696 int error;
697
698 if (hook != privp->ethernet_hook)
699 return (0);
700
701 /*
702 * If this is Ethernet hook, then request MAC address
703 * from our downstream.
704 */
705 NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_ENADDR, 0, M_NOWAIT);
706 if (msg == NULL)
707 return (ENOBUFS);
708
709 /*
710 * Our hook and peer hook have HK_INVALID flag set,
711 * so we can't use NG_SEND_MSG_HOOK() macro here.
712 */
713 NG_SEND_MSG_ID(error, privp->node, msg,
714 NG_NODE_ID(NG_PEER_NODE(privp->ethernet_hook)),
715 NG_NODE_ID(privp->node));
716
717 return (error);
718 }
719 /*
720 * Get a netgraph control message.
721 * Check it is one we understand. If needed, send a response.
722 * We sometimes save the address for an async action later.
723 * Always free the message.
724 */
725 static int
726 ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
727 {
728 priv_p privp = NG_NODE_PRIVATE(node);
729 struct ngpppoe_init_data *ourmsg = NULL;
730 struct ng_mesg *resp = NULL;
731 int error = 0;
732 hook_p hook = NULL;
733 sessp sp = NULL;
734 negp neg = NULL;
735 struct ng_mesg *msg;
736
737 NGI_GET_MSG(item, msg);
738 CTR5(KTR_NET, "%20s: node [%x] (%p) got message %d with cookie %d",
739 __func__, node->nd_ID, node, msg->header.cmd,
740 msg->header.typecookie);
741
742 /* Deal with message according to cookie and command. */
743 switch (msg->header.typecookie) {
744 case NGM_PPPOE_COOKIE:
745 switch (msg->header.cmd) {
746 case NGM_PPPOE_CONNECT:
747 case NGM_PPPOE_LISTEN:
748 case NGM_PPPOE_OFFER:
749 case NGM_PPPOE_SERVICE:
750 ourmsg = (struct ngpppoe_init_data *)msg->data;
751 if (msg->header.arglen < sizeof(*ourmsg)) {
752 log(LOG_ERR, "ng_pppoe[%x]: init data too "
753 "small\n", node->nd_ID);
754 LEAVE(EMSGSIZE);
755 }
756 if (msg->header.arglen - sizeof(*ourmsg) >
757 PPPOE_SERVICE_NAME_SIZE) {
758 log(LOG_ERR, "ng_pppoe[%x]: service name "
759 "too big\n", node->nd_ID);
760 LEAVE(EMSGSIZE);
761 }
762 if (msg->header.arglen - sizeof(*ourmsg) <
763 ourmsg->data_len) {
764 log(LOG_ERR, "ng_pppoe[%x]: init data has bad "
765 "length, %d should be %zd\n", node->nd_ID,
766 ourmsg->data_len,
767 msg->header.arglen - sizeof (*ourmsg));
768 LEAVE(EMSGSIZE);
769 }
770
771 /* Make sure strcmp will terminate safely. */
772 ourmsg->hook[sizeof(ourmsg->hook) - 1] = '\0';
773
774 /* Cycle through all known hooks. */
775 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
776 if (NG_HOOK_NAME(hook) &&
777 strcmp(NG_HOOK_NAME(hook), ourmsg->hook) ==
778 0)
779 break;
780 }
781 if (hook == NULL)
782 LEAVE(ENOENT);
783
784 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) ||
785 (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook))
786 LEAVE(EINVAL);
787
788 sp = NG_HOOK_PRIVATE(hook);
789
790 if (msg->header.cmd == NGM_PPPOE_LISTEN) {
791 /*
792 * Ensure we aren't already listening for this
793 * service.
794 */
795 if (pppoe_find_svc(node, ourmsg->data,
796 ourmsg->data_len) != NULL)
797 LEAVE(EEXIST);
798 }
799
800 /*
801 * PPPOE_SERVICE advertisments are set up
802 * on sessions that are in PRIMED state.
803 */
804 if (msg->header.cmd == NGM_PPPOE_SERVICE)
805 break;
806
807 if (sp->state != PPPOE_SNONE) {
808 log(LOG_NOTICE, "ng_pppoe[%x]: Session already "
809 "active\n", node->nd_ID);
810 LEAVE(EISCONN);
811 }
812
813 /*
814 * Set up prototype header.
815 */
816 neg = malloc(sizeof(*neg), M_NETGRAPH_PPPOE,
817 M_NOWAIT | M_ZERO);
818
819 if (neg == NULL)
820 LEAVE(ENOMEM);
821
822 neg->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
823 if (neg->m == NULL) {
824 free(neg, M_NETGRAPH_PPPOE);
825 LEAVE(ENOBUFS);
826 }
827 neg->m->m_pkthdr.rcvif = NULL;
828 sp->neg = neg;
829 ng_callout_init(&neg->handle);
830 neg->m->m_len = sizeof(struct pppoe_full_hdr);
831 neg->pkt = mtod(neg->m, union packet*);
832 memcpy((void *)&neg->pkt->pkt_header.eh,
833 &privp->eh, sizeof(struct ether_header));
834 neg->pkt->pkt_header.ph.ver = 0x1;
835 neg->pkt->pkt_header.ph.type = 0x1;
836 neg->pkt->pkt_header.ph.sid = 0x0000;
837 neg->timeout = 0;
838
839 sp->creator = NGI_RETADDR(item);
840 }
841 switch (msg->header.cmd) {
842 case NGM_PPPOE_GET_STATUS:
843 {
844 struct ngpppoestat *stats;
845
846 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT);
847 if (!resp)
848 LEAVE(ENOMEM);
849
850 stats = (struct ngpppoestat *) resp->data;
851 stats->packets_in = privp->packets_in;
852 stats->packets_out = privp->packets_out;
853 break;
854 }
855 case NGM_PPPOE_CONNECT:
856 /*
857 * Check the hook exists and is Uninitialised.
858 * Send a PADI request, and start the timeout logic.
859 * Store the originator of this message so we can send
860 * a success of fail message to them later.
861 * Move the session to SINIT.
862 * Set up the session to the correct state and
863 * start it.
864 */
865 neg->service.hdr.tag_type = PTT_SRV_NAME;
866 neg->service.hdr.tag_len =
867 htons((uint16_t)ourmsg->data_len);
868 if (ourmsg->data_len)
869 bcopy(ourmsg->data, neg->service.data,
870 ourmsg->data_len);
871 neg->service_len = ourmsg->data_len;
872 pppoe_start(sp);
873 break;
874 case NGM_PPPOE_LISTEN:
875 /*
876 * Check the hook exists and is Uninitialised.
877 * Install the service matching string.
878 * Store the originator of this message so we can send
879 * a success of fail message to them later.
880 * Move the hook to 'LISTENING'
881 */
882 neg->service.hdr.tag_type = PTT_SRV_NAME;
883 neg->service.hdr.tag_len =
884 htons((uint16_t)ourmsg->data_len);
885
886 if (ourmsg->data_len)
887 bcopy(ourmsg->data, neg->service.data,
888 ourmsg->data_len);
889 neg->service_len = ourmsg->data_len;
890 neg->pkt->pkt_header.ph.code = PADT_CODE;
891 /*
892 * Wait for PADI packet coming from Ethernet.
893 */
894 sp->state = PPPOE_LISTENING;
895 break;
896 case NGM_PPPOE_OFFER:
897 /*
898 * Check the hook exists and is Uninitialised.
899 * Store the originator of this message so we can send
900 * a success of fail message to them later.
901 * Store the AC-Name given and go to PRIMED.
902 */
903 neg->ac_name.hdr.tag_type = PTT_AC_NAME;
904 neg->ac_name.hdr.tag_len =
905 htons((uint16_t)ourmsg->data_len);
906 if (ourmsg->data_len)
907 bcopy(ourmsg->data, neg->ac_name.data,
908 ourmsg->data_len);
909 neg->ac_name_len = ourmsg->data_len;
910 neg->pkt->pkt_header.ph.code = PADO_CODE;
911 /*
912 * Wait for PADI packet coming from hook.
913 */
914 sp->state = PPPOE_PRIMED;
915 break;
916 case NGM_PPPOE_SERVICE:
917 /*
918 * Check the session is primed.
919 * for now just allow ONE service to be advertised.
920 * If you do it twice you just overwrite.
921 */
922 if (sp->state != PPPOE_PRIMED) {
923 log(LOG_NOTICE, "ng_pppoe[%x]: session not "
924 "primed\n", node->nd_ID);
925 LEAVE(EISCONN);
926 }
927 neg = sp->neg;
928 neg->service.hdr.tag_type = PTT_SRV_NAME;
929 neg->service.hdr.tag_len =
930 htons((uint16_t)ourmsg->data_len);
931
932 if (ourmsg->data_len)
933 bcopy(ourmsg->data, neg->service.data,
934 ourmsg->data_len);
935 neg->service_len = ourmsg->data_len;
936 break;
937 case NGM_PPPOE_SETMODE:
938 {
939 char *s;
940 size_t len;
941
942 if (msg->header.arglen == 0)
943 LEAVE(EINVAL);
944
945 s = (char *)msg->data;
946 len = msg->header.arglen - 1;
947
948 /* Search for matching mode string. */
949 if (len == strlen(NG_PPPOE_STANDARD) &&
950 (strncmp(NG_PPPOE_STANDARD, s, len) == 0)) {
951 privp->flags = 0;
952 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
953 break;
954 }
955 if (len == strlen(NG_PPPOE_3COM) &&
956 (strncmp(NG_PPPOE_3COM, s, len) == 0)) {
957 privp->flags |= COMPAT_3COM;
958 privp->eh.ether_type =
959 ETHERTYPE_PPPOE_3COM_DISC;
960 break;
961 }
962 if (len == strlen(NG_PPPOE_DLINK) &&
963 (strncmp(NG_PPPOE_DLINK, s, len) == 0)) {
964 privp->flags |= COMPAT_DLINK;
965 break;
966 }
967 error = EINVAL;
968 break;
969 }
970 case NGM_PPPOE_GETMODE:
971 {
972 char *s;
973 size_t len = 0;
974
975 if (privp->flags == 0)
976 len += strlen(NG_PPPOE_STANDARD) + 1;
977 if (privp->flags & COMPAT_3COM)
978 len += strlen(NG_PPPOE_3COM) + 1;
979 if (privp->flags & COMPAT_DLINK)
980 len += strlen(NG_PPPOE_DLINK) + 1;
981
982 NG_MKRESPONSE(resp, msg, len, M_NOWAIT);
983 if (resp == NULL)
984 LEAVE(ENOMEM);
985
986 s = (char *)resp->data;
987 if (privp->flags == 0) {
988 len = strlen(NG_PPPOE_STANDARD);
989 strlcpy(s, NG_PPPOE_STANDARD, len + 1);
990 break;
991 }
992 if (privp->flags & COMPAT_3COM) {
993 len = strlen(NG_PPPOE_3COM);
994 strlcpy(s, NG_PPPOE_3COM, len + 1);
995 s += len;
996 }
997 if (privp->flags & COMPAT_DLINK) {
998 if (s != resp->data)
999 *s++ = '|';
1000 len = strlen(NG_PPPOE_DLINK);
1001 strlcpy(s, NG_PPPOE_DLINK, len + 1);
1002 }
1003 break;
1004 }
1005 case NGM_PPPOE_SETENADDR:
1006 if (msg->header.arglen != ETHER_ADDR_LEN)
1007 LEAVE(EINVAL);
1008 bcopy(msg->data, &privp->eh.ether_shost,
1009 ETHER_ADDR_LEN);
1010 break;
1011 default:
1012 LEAVE(EINVAL);
1013 }
1014 break;
1015 case NGM_ETHER_COOKIE:
1016 if (!(msg->header.flags & NGF_RESP))
1017 LEAVE(EINVAL);
1018 switch (msg->header.cmd) {
1019 case NGM_ETHER_GET_ENADDR:
1020 if (msg->header.arglen != ETHER_ADDR_LEN)
1021 LEAVE(EINVAL);
1022 bcopy(msg->data, &privp->eh.ether_shost,
1023 ETHER_ADDR_LEN);
1024 break;
1025 default:
1026 LEAVE(EINVAL);
1027 }
1028 break;
1029 default:
1030 LEAVE(EINVAL);
1031 }
1032
1033 /* Take care of synchronous response, if any. */
1034 quit:
1035 CTR2(KTR_NET, "%20s: returning %d", __func__, error);
1036 NG_RESPOND_MSG(error, node, item, resp);
1037 /* Free the message and return. */
1038 NG_FREE_MSG(msg);
1039 return(error);
1040 }
1041
1042 /*
1043 * Start a client into the first state. A separate function because
1044 * it can be needed if the negotiation times out.
1045 */
1046 static void
1047 pppoe_start(sessp sp)
1048 {
1049 priv_p privp = NG_NODE_PRIVATE(NG_PPPOE_SESSION_NODE(sp));
1050 struct {
1051 struct pppoe_tag hdr;
1052 union uniq data;
1053 } __packed uniqtag;
1054
1055 /*
1056 * Kick the state machine into starting up.
1057 */
1058 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1059 sp->state = PPPOE_SINIT;
1060 /*
1061 * Reset the packet header to broadcast. Since we are
1062 * in a client mode use configured ethertype.
1063 */
1064 memcpy((void *)&sp->neg->pkt->pkt_header.eh, &privp->eh,
1065 sizeof(struct ether_header));
1066 sp->neg->pkt->pkt_header.ph.code = PADI_CODE;
1067 uniqtag.hdr.tag_type = PTT_HOST_UNIQ;
1068 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data));
1069 uniqtag.data.pointer = sp;
1070 init_tags(sp);
1071 insert_tag(sp, &uniqtag.hdr);
1072 insert_tag(sp, &sp->neg->service.hdr);
1073 make_packet(sp);
1074 ng_pppoe_sendpacket(sp);
1075 }
1076
1077 static int
1078 send_acname(sessp sp, const struct pppoe_tag *tag)
1079 {
1080 int error, tlen;
1081 struct ng_mesg *msg;
1082 struct ngpppoe_sts *sts;
1083
1084 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1085
1086 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_ACNAME,
1087 sizeof(struct ngpppoe_sts), M_NOWAIT);
1088 if (msg == NULL)
1089 return (ENOMEM);
1090
1091 sts = (struct ngpppoe_sts *)msg->data;
1092 tlen = min(NG_HOOKSIZ - 1, ntohs(tag->tag_len));
1093 strncpy(sts->hook, tag->tag_data, tlen);
1094 sts->hook[tlen] = '\0';
1095 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1096
1097 return (error);
1098 }
1099
1100 static int
1101 send_sessionid(sessp sp)
1102 {
1103 int error;
1104 struct ng_mesg *msg;
1105
1106 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1107
1108 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_SESSIONID,
1109 sizeof(uint16_t), M_NOWAIT);
1110 if (msg == NULL)
1111 return (ENOMEM);
1112
1113 *(uint16_t *)msg->data = sp->Session_ID;
1114 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1115
1116 return (error);
1117 }
1118
1119 /*
1120 * Receive data, and do something with it.
1121 * The caller will never free m, so if we use up this data
1122 * or abort we must free it.
1123 */
1124 static int
1125 ng_pppoe_rcvdata(hook_p hook, item_p item)
1126 {
1127 node_p node = NG_HOOK_NODE(hook);
1128 const priv_p privp = NG_NODE_PRIVATE(node);
1129 sessp sp = NG_HOOK_PRIVATE(hook);
1130 const struct pppoe_tag *utag = NULL, *tag = NULL;
1131 const struct pppoe_full_hdr *wh;
1132 const struct pppoe_hdr *ph;
1133 negp neg = NULL;
1134 struct mbuf *m;
1135 hook_p sendhook;
1136 int error = 0;
1137 uint16_t session;
1138 uint16_t length;
1139 uint8_t code;
1140 struct {
1141 struct pppoe_tag hdr;
1142 union uniq data;
1143 } __packed uniqtag;
1144
1145 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)",
1146 __func__, node->nd_ID, node, item, hook->hk_name, hook);
1147
1148 NGI_GET_M(item, m);
1149 if (NG_HOOK_PRIVATE(hook) == &privp->debug_hook) {
1150 /*
1151 * Data from the debug hook gets sent without modification
1152 * straight to the ethernet.
1153 */
1154 NG_FWD_ITEM_HOOK( error, item, privp->ethernet_hook);
1155 privp->packets_out++;
1156 } else if (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook) {
1157 /*
1158 * Incoming data.
1159 * Dig out various fields from the packet.
1160 * Use them to decide where to send it.
1161 */
1162
1163 privp->packets_in++;
1164 if( m->m_len < sizeof(*wh)) {
1165 m = m_pullup(m, sizeof(*wh)); /* Checks length */
1166 if (m == NULL) {
1167 log(LOG_NOTICE, "ng_pppoe[%x]: couldn't "
1168 "m_pullup(wh)\n", node->nd_ID);
1169 LEAVE(ENOBUFS);
1170 }
1171 }
1172 wh = mtod(m, struct pppoe_full_hdr *);
1173 length = ntohs(wh->ph.length);
1174 switch(wh->eh.ether_type) {
1175 case ETHERTYPE_PPPOE_3COM_DISC: /* fall through */
1176 case ETHERTYPE_PPPOE_DISC:
1177 /*
1178 * We need to try to make sure that the tag area
1179 * is contiguous, or we could wander off the end
1180 * of a buffer and make a mess.
1181 * (Linux wouldn't have this problem).
1182 */
1183 if (m->m_pkthdr.len <= MHLEN) {
1184 if( m->m_len < m->m_pkthdr.len) {
1185 m = m_pullup(m, m->m_pkthdr.len);
1186 if (m == NULL) {
1187 log(LOG_NOTICE, "ng_pppoe[%x]: "
1188 "couldn't "
1189 "m_pullup(pkthdr)\n",
1190 node->nd_ID);
1191 LEAVE(ENOBUFS);
1192 }
1193 }
1194 }
1195 if (m->m_len != m->m_pkthdr.len) {
1196 /*
1197 * It's not all in one piece.
1198 * We need to do extra work.
1199 * Put it into a cluster.
1200 */
1201 struct mbuf *n;
1202 n = m_dup(m, M_DONTWAIT);
1203 m_freem(m);
1204 m = n;
1205 if (m) {
1206 /* just check we got a cluster */
1207 if (m->m_len != m->m_pkthdr.len) {
1208 m_freem(m);
1209 m = NULL;
1210 }
1211 }
1212 if (m == NULL) {
1213 log(LOG_NOTICE, "ng_pppoe[%x]: packet "
1214 "fragmented\n", node->nd_ID);
1215 LEAVE(EMSGSIZE);
1216 }
1217 }
1218 wh = mtod(m, struct pppoe_full_hdr *);
1219 length = ntohs(wh->ph.length);
1220 ph = &wh->ph;
1221 session = ntohs(wh->ph.sid);
1222 code = wh->ph.code;
1223
1224 switch(code) {
1225 case PADI_CODE:
1226 /*
1227 * We are a server:
1228 * Look for a hook with the required service
1229 * and send the ENTIRE packet up there.
1230 * It should come back to a new hook in
1231 * PRIMED state. Look there for further
1232 * processing.
1233 */
1234 tag = get_tag(ph, PTT_SRV_NAME);
1235 if (tag == NULL) {
1236 CTR1(KTR_NET,
1237 "%20s: PADI w/o Service-Name",
1238 __func__);
1239 LEAVE(ENETUNREACH);
1240 }
1241
1242 /*
1243 * First, try to match Service-Name
1244 * against our listening hooks. If
1245 * no success and we are in D-Link
1246 * compat mode and Service-Name is
1247 * empty, then we broadcast the PADI
1248 * to all listening hooks.
1249 */
1250 sendhook = pppoe_match_svc(node, tag);
1251 if (sendhook != NULL)
1252 NG_FWD_NEW_DATA(error, item,
1253 sendhook, m);
1254 else if (privp->flags & COMPAT_DLINK &&
1255 ntohs(tag->tag_len) == 0)
1256 error = pppoe_broadcast_padi(node, m);
1257 else
1258 error = ENETUNREACH;
1259 break;
1260 case PADO_CODE:
1261 /*
1262 * We are a client:
1263 * Use the host_uniq tag to find the
1264 * hook this is in response to.
1265 * Received #2, now send #3
1266 * For now simply accept the first we receive.
1267 */
1268 utag = get_tag(ph, PTT_HOST_UNIQ);
1269 if ((utag == NULL)
1270 || (ntohs(utag->tag_len) != sizeof(sp))) {
1271 log(LOG_NOTICE, "ng_pppoe[%x]: no host "
1272 "unique field\n", node->nd_ID);
1273 LEAVE(ENETUNREACH);
1274 }
1275
1276 sendhook = pppoe_finduniq(node, utag);
1277 if (sendhook == NULL) {
1278 log(LOG_NOTICE, "ng_pppoe[%x]: no "
1279 "matching session\n", node->nd_ID);
1280 LEAVE(ENETUNREACH);
1281 }
1282
1283 /*
1284 * Check the session is in the right state.
1285 * It needs to be in PPPOE_SINIT.
1286 */
1287 sp = NG_HOOK_PRIVATE(sendhook);
1288 if (sp->state != PPPOE_SINIT) {
1289 log(LOG_NOTICE, "ng_pppoe[%x]: session "
1290 "in wrong state\n", node->nd_ID);
1291 LEAVE(ENETUNREACH);
1292 }
1293 neg = sp->neg;
1294 ng_uncallout(&neg->handle, node);
1295
1296 /*
1297 * This is the first time we hear
1298 * from the server, so note it's
1299 * unicast address, replacing the
1300 * broadcast address .
1301 */
1302 bcopy(wh->eh.ether_shost,
1303 neg->pkt->pkt_header.eh.ether_dhost,
1304 ETHER_ADDR_LEN);
1305 neg->timeout = 0;
1306 neg->pkt->pkt_header.ph.code = PADR_CODE;
1307 init_tags(sp);
1308 insert_tag(sp, utag); /* Host Unique */
1309 if ((tag = get_tag(ph, PTT_AC_COOKIE)))
1310 insert_tag(sp, tag); /* return cookie */
1311 if ((tag = get_tag(ph, PTT_AC_NAME))) {
1312 insert_tag(sp, tag); /* return it */
1313 send_acname(sp, tag);
1314 }
1315 insert_tag(sp, &neg->service.hdr); /* Service */
1316 scan_tags(sp, ph);
1317 make_packet(sp);
1318 sp->state = PPPOE_SREQ;
1319 ng_pppoe_sendpacket(sp);
1320 break;
1321 case PADR_CODE:
1322
1323 /*
1324 * We are a server:
1325 * Use the ac_cookie tag to find the
1326 * hook this is in response to.
1327 */
1328 utag = get_tag(ph, PTT_AC_COOKIE);
1329 if ((utag == NULL)
1330 || (ntohs(utag->tag_len) != sizeof(sp))) {
1331 LEAVE(ENETUNREACH);
1332 }
1333
1334 sendhook = pppoe_finduniq(node, utag);
1335 if (sendhook == NULL) {
1336 LEAVE(ENETUNREACH);
1337 }
1338
1339 /*
1340 * Check the session is in the right state.
1341 * It needs to be in PPPOE_SOFFER
1342 * or PPPOE_NEWCONNECTED. If the latter,
1343 * then this is a retry by the client.
1344 * so be nice, and resend.
1345 */
1346 sp = NG_HOOK_PRIVATE(sendhook);
1347 if (sp->state == PPPOE_NEWCONNECTED) {
1348 /*
1349 * Whoa! drop back to resend that
1350 * PADS packet.
1351 * We should still have a copy of it.
1352 */
1353 sp->state = PPPOE_SOFFER;
1354 }
1355 if (sp->state != PPPOE_SOFFER) {
1356 LEAVE (ENETUNREACH);
1357 break;
1358 }
1359 neg = sp->neg;
1360 ng_uncallout(&neg->handle, node);
1361 neg->pkt->pkt_header.ph.code = PADS_CODE;
1362 if (sp->Session_ID == 0)
1363 neg->pkt->pkt_header.ph.sid =
1364 htons(sp->Session_ID
1365 = get_new_sid(node));
1366 send_sessionid(sp);
1367 neg->timeout = 0;
1368 /*
1369 * start working out the tags to respond with.
1370 */
1371 init_tags(sp);
1372 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
1373 if ((tag = get_tag(ph, PTT_SRV_NAME)))
1374 insert_tag(sp, tag);/* return service */
1375 if ((tag = get_tag(ph, PTT_HOST_UNIQ)))
1376 insert_tag(sp, tag); /* return it */
1377 insert_tag(sp, utag); /* ac_cookie */
1378 scan_tags(sp, ph);
1379 make_packet(sp);
1380 sp->state = PPPOE_NEWCONNECTED;
1381 ng_pppoe_sendpacket(sp);
1382 /*
1383 * Having sent the last Negotiation header,
1384 * Set up the stored packet header to
1385 * be correct for the actual session.
1386 * But keep the negotialtion stuff
1387 * around in case we need to resend this last
1388 * packet. We'll discard it when we move
1389 * from NEWCONNECTED to CONNECTED
1390 */
1391 sp->pkt_hdr = neg->pkt->pkt_header;
1392 /* Configure ethertype depending on what
1393 * ethertype was used at discovery phase */
1394 if (sp->pkt_hdr.eh.ether_type ==
1395 ETHERTYPE_PPPOE_3COM_DISC)
1396 sp->pkt_hdr.eh.ether_type
1397 = ETHERTYPE_PPPOE_3COM_SESS;
1398 else
1399 sp->pkt_hdr.eh.ether_type
1400 = ETHERTYPE_PPPOE_SESS;
1401 sp->pkt_hdr.ph.code = 0;
1402 pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
1403 break;
1404 case PADS_CODE:
1405 /*
1406 * We are a client:
1407 * Use the host_uniq tag to find the
1408 * hook this is in response to.
1409 * take the session ID and store it away.
1410 * Also make sure the pre-made header is
1411 * correct and set us into Session mode.
1412 */
1413 utag = get_tag(ph, PTT_HOST_UNIQ);
1414 if ((utag == NULL)
1415 || (ntohs(utag->tag_len) != sizeof(sp))) {
1416 LEAVE (ENETUNREACH);
1417 break;
1418 }
1419 sendhook = pppoe_finduniq(node, utag);
1420 if (sendhook == NULL) {
1421 LEAVE(ENETUNREACH);
1422 }
1423
1424 /*
1425 * Check the session is in the right state.
1426 * It needs to be in PPPOE_SREQ.
1427 */
1428 sp = NG_HOOK_PRIVATE(sendhook);
1429 if (sp->state != PPPOE_SREQ) {
1430 LEAVE(ENETUNREACH);
1431 }
1432 neg = sp->neg;
1433 ng_uncallout(&neg->handle, node);
1434 neg->pkt->pkt_header.ph.sid = wh->ph.sid;
1435 sp->Session_ID = ntohs(wh->ph.sid);
1436 send_sessionid(sp);
1437 neg->timeout = 0;
1438 sp->state = PPPOE_CONNECTED;
1439 /*
1440 * Now we have gone to Connected mode,
1441 * Free all resources needed for
1442 * negotiation.
1443 * Keep a copy of the header we will be using.
1444 */
1445 sp->pkt_hdr = neg->pkt->pkt_header;
1446 if (privp->flags & COMPAT_3COM)
1447 sp->pkt_hdr.eh.ether_type
1448 = ETHERTYPE_PPPOE_3COM_SESS;
1449 else
1450 sp->pkt_hdr.eh.ether_type
1451 = ETHERTYPE_PPPOE_SESS;
1452 sp->pkt_hdr.ph.code = 0;
1453 m_freem(neg->m);
1454 free(sp->neg, M_NETGRAPH_PPPOE);
1455 sp->neg = NULL;
1456 pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
1457 break;
1458 case PADT_CODE:
1459 /*
1460 * Send a 'close' message to the controlling
1461 * process (the one that set us up);
1462 * And then tear everything down.
1463 *
1464 * Find matching peer/session combination.
1465 */
1466 sendhook = pppoe_findsession(node, wh);
1467 if (sendhook == NULL) {
1468 LEAVE(ENETUNREACH);
1469 }
1470 /* send message to creator */
1471 /* close hook */
1472 if (sendhook) {
1473 ng_rmhook_self(sendhook);
1474 }
1475 break;
1476 default:
1477 LEAVE(EPFNOSUPPORT);
1478 }
1479 break;
1480 case ETHERTYPE_PPPOE_3COM_SESS:
1481 case ETHERTYPE_PPPOE_SESS:
1482 /*
1483 * Find matching peer/session combination.
1484 */
1485 sendhook = pppoe_findsession(node, wh);
1486 if (sendhook == NULL) {
1487 LEAVE (ENETUNREACH);
1488 break;
1489 }
1490 sp = NG_HOOK_PRIVATE(sendhook);
1491 m_adj(m, sizeof(*wh));
1492 if (m->m_pkthdr.len < length) {
1493 /* Packet too short, dump it */
1494 LEAVE(EMSGSIZE);
1495 }
1496
1497 /* Also need to trim excess at the end */
1498 if (m->m_pkthdr.len > length) {
1499 m_adj(m, -((int)(m->m_pkthdr.len - length)));
1500 }
1501 if ( sp->state != PPPOE_CONNECTED) {
1502 if (sp->state == PPPOE_NEWCONNECTED) {
1503 sp->state = PPPOE_CONNECTED;
1504 /*
1505 * Now we have gone to Connected mode,
1506 * Free all resources needed for
1507 * negotiation. Be paranoid about
1508 * whether there may be a timeout.
1509 */
1510 m_freem(sp->neg->m);
1511 ng_uncallout(&sp->neg->handle, node);
1512 free(sp->neg, M_NETGRAPH_PPPOE);
1513 sp->neg = NULL;
1514 } else {
1515 LEAVE (ENETUNREACH);
1516 break;
1517 }
1518 }
1519 NG_FWD_NEW_DATA( error, item, sendhook, m);
1520 break;
1521 default:
1522 LEAVE(EPFNOSUPPORT);
1523 }
1524 } else {
1525 /*
1526 * Not ethernet or debug hook..
1527 *
1528 * The packet has come in on a normal hook.
1529 * We need to find out what kind of hook,
1530 * So we can decide how to handle it.
1531 * Check the hook's state.
1532 */
1533 sp = NG_HOOK_PRIVATE(hook);
1534 switch (sp->state) {
1535 case PPPOE_NEWCONNECTED:
1536 case PPPOE_CONNECTED: {
1537 static const u_char addrctrl[] = { 0xff, 0x03 };
1538 struct pppoe_full_hdr *wh;
1539
1540 /*
1541 * Remove PPP address and control fields, if any.
1542 * For example, ng_ppp(4) always sends LCP packets
1543 * with address and control fields as required by
1544 * generic PPP. PPPoE is an exception to the rule.
1545 */
1546 if (m->m_pkthdr.len >= 2) {
1547 if (m->m_len < 2 && !(m = m_pullup(m, 2)))
1548 LEAVE(ENOBUFS);
1549 if (bcmp(mtod(m, u_char *), addrctrl, 2) == 0)
1550 m_adj(m, 2);
1551 }
1552 /*
1553 * Bang in a pre-made header, and set the length up
1554 * to be correct. Then send it to the ethernet driver.
1555 * But first correct the length.
1556 */
1557 sp->pkt_hdr.ph.length = htons((short)(m->m_pkthdr.len));
1558 M_PREPEND(m, sizeof(*wh), M_DONTWAIT);
1559 if (m == NULL)
1560 LEAVE(ENOBUFS);
1561
1562 wh = mtod(m, struct pppoe_full_hdr *);
1563 bcopy(&sp->pkt_hdr, wh, sizeof(*wh));
1564 NG_FWD_NEW_DATA( error, item, privp->ethernet_hook, m);
1565 privp->packets_out++;
1566 break;
1567 }
1568 case PPPOE_PRIMED:
1569 /*
1570 * A PADI packet is being returned by the application
1571 * that has set up this hook. This indicates that it
1572 * wants us to offer service.
1573 */
1574 neg = sp->neg;
1575 if (m->m_len < sizeof(*wh)) {
1576 m = m_pullup(m, sizeof(*wh));
1577 if (m == NULL)
1578 LEAVE(ENOBUFS);
1579 }
1580 wh = mtod(m, struct pppoe_full_hdr *);
1581 ph = &wh->ph;
1582 session = ntohs(wh->ph.sid);
1583 length = ntohs(wh->ph.length);
1584 code = wh->ph.code;
1585 /* Use peers mode in session. */
1586 neg->pkt->pkt_header.eh.ether_type = wh->eh.ether_type;
1587 if (code != PADI_CODE)
1588 LEAVE(EINVAL);
1589 ng_uncallout(&neg->handle, node);
1590
1591 /*
1592 * This is the first time we hear
1593 * from the client, so note it's
1594 * unicast address, replacing the
1595 * broadcast address.
1596 */
1597 bcopy(wh->eh.ether_shost,
1598 neg->pkt->pkt_header.eh.ether_dhost,
1599 ETHER_ADDR_LEN);
1600 sp->state = PPPOE_SOFFER;
1601 neg->timeout = 0;
1602 neg->pkt->pkt_header.ph.code = PADO_CODE;
1603
1604 /*
1605 * Start working out the tags to respond with.
1606 */
1607 uniqtag.hdr.tag_type = PTT_AC_COOKIE;
1608 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(sp));
1609 uniqtag.data.pointer = sp;
1610 init_tags(sp);
1611 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
1612 if ((tag = get_tag(ph, PTT_SRV_NAME)))
1613 insert_tag(sp, tag); /* return service */
1614 /*
1615 * If we have a NULL service request
1616 * and have an extra service defined in this hook,
1617 * then also add a tag for the extra service.
1618 * XXX this is a hack. eventually we should be able
1619 * to support advertising many services, not just one
1620 */
1621 if (((tag == NULL) || (tag->tag_len == 0)) &&
1622 (neg->service.hdr.tag_len != 0)) {
1623 insert_tag(sp, &neg->service.hdr); /* SERVICE */
1624 }
1625 if ((tag = get_tag(ph, PTT_HOST_UNIQ)))
1626 insert_tag(sp, tag); /* returned hostunique */
1627 insert_tag(sp, &uniqtag.hdr);
1628 scan_tags(sp, ph);
1629 make_packet(sp);
1630 ng_pppoe_sendpacket(sp);
1631 break;
1632
1633 /*
1634 * Packets coming from the hook make no sense
1635 * to sessions in these states. Throw them away.
1636 */
1637 case PPPOE_SINIT:
1638 case PPPOE_SREQ:
1639 case PPPOE_SOFFER:
1640 case PPPOE_SNONE:
1641 case PPPOE_LISTENING:
1642 case PPPOE_DEAD:
1643 default:
1644 LEAVE(ENETUNREACH);
1645 }
1646 }
1647 quit:
1648 if (item)
1649 NG_FREE_ITEM(item);
1650 NG_FREE_M(m);
1651 return error;
1652 }
1653
1654 /*
1655 * Do local shutdown processing..
1656 * If we are a persistant device, we might refuse to go away, and
1657 * we'd only remove our links and reset ourself.
1658 */
1659 static int
1660 ng_pppoe_shutdown(node_p node)
1661 {
1662 const priv_p privdata = NG_NODE_PRIVATE(node);
1663
1664 NG_NODE_SET_PRIVATE(node, NULL);
1665 NG_NODE_UNREF(privdata->node);
1666 free(privdata, M_NETGRAPH_PPPOE);
1667 return (0);
1668 }
1669
1670 /*
1671 * Hook disconnection
1672 *
1673 * Clean up all dangling links and information about the session/hook.
1674 * For this type, removal of the last link destroys the node.
1675 */
1676 static int
1677 ng_pppoe_disconnect(hook_p hook)
1678 {
1679 node_p node = NG_HOOK_NODE(hook);
1680 priv_p privp = NG_NODE_PRIVATE(node);
1681 sessp sp;
1682 int hooks;
1683
1684 hooks = NG_NODE_NUMHOOKS(node); /* This one already not counted. */
1685 if (NG_HOOK_PRIVATE(hook) == &privp->debug_hook) {
1686 privp->debug_hook = NULL;
1687 } else if (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook) {
1688 privp->ethernet_hook = NULL;
1689 if (NG_NODE_IS_VALID(node))
1690 ng_rmnode_self(node);
1691 } else {
1692 sp = NG_HOOK_PRIVATE(hook);
1693 if (sp->state != PPPOE_SNONE ) {
1694 pppoe_send_event(sp, NGM_PPPOE_CLOSE);
1695 }
1696 /*
1697 * According to the spec, if we are connected,
1698 * we should send a DISC packet if we are shutting down
1699 * a session.
1700 */
1701 if ((privp->ethernet_hook)
1702 && ((sp->state == PPPOE_CONNECTED)
1703 || (sp->state == PPPOE_NEWCONNECTED))) {
1704 struct mbuf *m;
1705 struct pppoe_full_hdr *wh;
1706 struct pppoe_tag *tag;
1707 int msglen = strlen(SIGNOFF);
1708 int error = 0;
1709
1710 /* Revert the stored header to DISC/PADT mode. */
1711 wh = &sp->pkt_hdr;
1712 wh->ph.code = PADT_CODE;
1713 /*
1714 * Configure ethertype depending on what was used
1715 * during sessions stage.
1716 */
1717 if (sp->pkt_hdr.eh.ether_type ==
1718 ETHERTYPE_PPPOE_3COM_SESS)
1719 wh->eh.ether_type = ETHERTYPE_PPPOE_3COM_DISC;
1720 else
1721 wh->eh.ether_type = ETHERTYPE_PPPOE_DISC;
1722
1723 /* Generate a packet of that type. */
1724 MGETHDR(m, M_DONTWAIT, MT_DATA);
1725 if (m == NULL)
1726 log(LOG_NOTICE, "ng_pppoe[%x]: session out of "
1727 "mbufs\n", node->nd_ID);
1728 else {
1729 m->m_pkthdr.rcvif = NULL;
1730 m->m_pkthdr.len = m->m_len = sizeof(*wh);
1731 bcopy((caddr_t)wh, mtod(m, caddr_t),
1732 sizeof(*wh));
1733 /*
1734 * Add a General error message and adjust
1735 * sizes.
1736 */
1737 wh = mtod(m, struct pppoe_full_hdr *);
1738 tag = wh->ph.tag;
1739 tag->tag_type = PTT_GEN_ERR;
1740 tag->tag_len = htons((u_int16_t)msglen);
1741 strncpy(tag->tag_data, SIGNOFF, msglen);
1742 m->m_pkthdr.len = (m->m_len += sizeof(*tag) +
1743 msglen);
1744 wh->ph.length = htons(sizeof(*tag) + msglen);
1745 NG_SEND_DATA_ONLY(error,
1746 privp->ethernet_hook, m);
1747 }
1748 }
1749 /*
1750 * As long as we have somewhere to store the timeout handle,
1751 * we may have a timeout pending.. get rid of it.
1752 */
1753 if (sp->neg) {
1754 ng_uncallout(&sp->neg->handle, node);
1755 if (sp->neg->m)
1756 m_freem(sp->neg->m);
1757 free(sp->neg, M_NETGRAPH_PPPOE);
1758 }
1759 free(sp, M_NETGRAPH_PPPOE);
1760 NG_HOOK_SET_PRIVATE(hook, NULL);
1761
1762 /*
1763 * Work out how many session hooks there are.
1764 * Node goes away on last session hook removal.
1765 */
1766 if (privp->ethernet_hook)
1767 hooks -= 1;
1768 if (privp->debug_hook)
1769 hooks -= 1;
1770 }
1771 if ((NG_NODE_NUMHOOKS(node) == 0) &&
1772 (NG_NODE_IS_VALID(node)))
1773 ng_rmnode_self(node);
1774 return (0);
1775 }
1776
1777 /*
1778 * Timeouts come here.
1779 */
1780 static void
1781 pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2)
1782 {
1783 priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
1784 sessp sp = NG_HOOK_PRIVATE(hook);
1785 negp neg = sp->neg;
1786 struct mbuf *m0 = NULL;
1787 int error = 0;
1788
1789 CTR6(KTR_NET, "%20s: node [%x] (%p) hook \"%s\" (%p) session %d",
1790 __func__, node->nd_ID, node, hook->hk_name, hook, sp->Session_ID);
1791 switch(sp->state) {
1792 /*
1793 * Resend the last packet, using an exponential backoff.
1794 * After a period of time, stop growing the backoff,
1795 * And either leave it, or revert to the start.
1796 */
1797 case PPPOE_SINIT:
1798 case PPPOE_SREQ:
1799 /* Timeouts on these produce resends. */
1800 m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
1801 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0);
1802 ng_callout(&neg->handle, node, hook, neg->timeout * hz,
1803 pppoe_ticker, NULL, 0);
1804 if ((neg->timeout <<= 1) > PPPOE_TIMEOUT_LIMIT) {
1805 if (sp->state == PPPOE_SREQ) {
1806 /* Revert to SINIT mode. */
1807 pppoe_start(sp);
1808 } else {
1809 neg->timeout = PPPOE_TIMEOUT_LIMIT;
1810 }
1811 }
1812 break;
1813 case PPPOE_PRIMED:
1814 case PPPOE_SOFFER:
1815 /* A timeout on these says "give up" */
1816 ng_rmhook_self(hook);
1817 break;
1818 default:
1819 /* Timeouts have no meaning in other states. */
1820 log(LOG_NOTICE, "ng_pppoe[%x]: unexpected timeout\n",
1821 node->nd_ID);
1822 }
1823 }
1824
1825
1826 static void
1827 ng_pppoe_sendpacket(sessp sp)
1828 {
1829 struct mbuf *m0 = NULL;
1830 hook_p hook = sp->hook;
1831 node_p node = NG_HOOK_NODE(hook);
1832 priv_p privp = NG_NODE_PRIVATE(node);
1833 negp neg = sp->neg;
1834 int error = 0;
1835
1836 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1837 switch(sp->state) {
1838 case PPPOE_LISTENING:
1839 case PPPOE_DEAD:
1840 case PPPOE_SNONE:
1841 case PPPOE_CONNECTED:
1842 log(LOG_NOTICE, "%s: unexpected state %d\n",
1843 __func__, sp->state);
1844 break;
1845
1846 case PPPOE_NEWCONNECTED:
1847 /* Send the PADS without a timeout - we're now connected. */
1848 m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
1849 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0);
1850 break;
1851
1852 case PPPOE_PRIMED:
1853 /* No packet to send, but set up the timeout. */
1854 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz,
1855 pppoe_ticker, NULL, 0);
1856 break;
1857
1858 case PPPOE_SOFFER:
1859 /*
1860 * Send the offer but if they don't respond
1861 * in PPPOE_OFFER_TIMEOUT seconds, forget about it.
1862 */
1863 m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
1864 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0);
1865 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz,
1866 pppoe_ticker, NULL, 0);
1867 break;
1868
1869 case PPPOE_SINIT:
1870 case PPPOE_SREQ:
1871 m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
1872 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0);
1873 ng_callout(&neg->handle, node, hook, PPPOE_INITIAL_TIMEOUT * hz,
1874 pppoe_ticker, NULL, 0);
1875 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2;
1876 break;
1877
1878 default:
1879 error = EINVAL;
1880 log(LOG_NOTICE, "%s: bad state %d\n", __func__, sp->state);
1881 }
1882 }
1883
1884 /*
1885 * Parse an incoming packet to see if any tags should be copied to the
1886 * output packet. Don't do any tags that have been handled in the main
1887 * state machine.
1888 */
1889 static const struct pppoe_tag*
1890 scan_tags(sessp sp, const struct pppoe_hdr* ph)
1891 {
1892 const char *const end = (const char *)next_tag(ph);
1893 const char *ptn;
1894 const struct pppoe_tag *pt = &ph->tag[0];
1895
1896 /*
1897 * Keep processing tags while a tag header will still fit.
1898 */
1899 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1900
1901 while((const char*)(pt + 1) <= end) {
1902 /*
1903 * If the tag data would go past the end of the packet, abort.
1904 */
1905 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len));
1906 if(ptn > end)
1907 return NULL;
1908
1909 switch (pt->tag_type) {
1910 case PTT_RELAY_SID:
1911 insert_tag(sp, pt);
1912 break;
1913 case PTT_EOL:
1914 return NULL;
1915 case PTT_SRV_NAME:
1916 case PTT_AC_NAME:
1917 case PTT_HOST_UNIQ:
1918 case PTT_AC_COOKIE:
1919 case PTT_VENDOR:
1920 case PTT_SRV_ERR:
1921 case PTT_SYS_ERR:
1922 case PTT_GEN_ERR:
1923 break;
1924 }
1925 pt = (const struct pppoe_tag*)ptn;
1926 }
1927 return NULL;
1928 }
1929
1930 static int
1931 pppoe_send_event(sessp sp, enum cmd cmdid)
1932 {
1933 int error;
1934 struct ng_mesg *msg;
1935 struct ngpppoe_sts *sts;
1936
1937 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
1938
1939 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, cmdid,
1940 sizeof(struct ngpppoe_sts), M_NOWAIT);
1941 if (msg == NULL)
1942 return (ENOMEM);
1943 sts = (struct ngpppoe_sts *)msg->data;
1944 strncpy(sts->hook, NG_HOOK_NAME(sp->hook), NG_HOOKSIZ);
1945 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
1946 return (error);
1947 }
Cache object: a184deaec3e68bf8e4c5c79504e8015f
|