1 /*-
2 * Copyright (c) 2000 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/usr.sbin/ppp/netgraph.c,v 1.6.10.1.4.1 2010/12/21 17:10:29 kensmith Exp $
27 */
28
29 #include <sys/param.h>
30 #include <sys/socket.h>
31 #include <sys/un.h>
32 #include <netinet/in.h>
33 #include <arpa/inet.h>
34 #include <netdb.h>
35 #include <netgraph.h>
36 #include <net/ethernet.h>
37 #include <netinet/in_systm.h>
38 #include <netinet/ip.h>
39 #include <netgraph/ng_ether.h>
40 #include <netgraph/ng_message.h>
41 #include <netgraph/ng_socket.h>
42
43 #include <errno.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <sysexits.h>
48 #include <sys/fcntl.h>
49 #include <sys/uio.h>
50 #include <termios.h>
51 #include <sys/time.h>
52 #include <unistd.h>
53
54 #include "layer.h"
55 #include "defs.h"
56 #include "mbuf.h"
57 #include "log.h"
58 #include "timer.h"
59 #include "lqr.h"
60 #include "hdlc.h"
61 #include "throughput.h"
62 #include "fsm.h"
63 #include "lcp.h"
64 #include "ccp.h"
65 #include "link.h"
66 #include "async.h"
67 #include "descriptor.h"
68 #include "physical.h"
69 #include "main.h"
70 #include "mp.h"
71 #include "chat.h"
72 #include "auth.h"
73 #include "chap.h"
74 #include "cbcp.h"
75 #include "datalink.h"
76 #include "slcompress.h"
77 #include "iplist.h"
78 #include "ncpaddr.h"
79 #include "ipcp.h"
80 #include "ipv6cp.h"
81 #include "ncp.h"
82 #include "filter.h"
83 #ifndef NORADIUS
84 #include "radius.h"
85 #endif
86 #include "bundle.h"
87 #include "id.h"
88 #include "netgraph.h"
89
90
91 struct ngdevice {
92 struct device dev; /* What struct physical knows about */
93 int cs; /* Control socket */
94 char hook[NG_HOOKSIZ]; /* Our socket node hook */
95 };
96
97 #define device2ng(d) ((d)->type == NG_DEVICE ? (struct ngdevice *)d : NULL)
98 #define NG_MSGBUFSZ 4096
99 #define NETGRAPH_PREFIX "netgraph:"
100
101 unsigned
ng_DeviceSize(void)102 ng_DeviceSize(void)
103 {
104 return sizeof(struct ngdevice);
105 }
106
107 static int
ng_MessageOut(struct ngdevice * dev,const char * data)108 ng_MessageOut(struct ngdevice *dev, const char *data)
109 {
110 char path[NG_PATHSIZ];
111 char *fmt;
112 size_t len;
113 int pos, dpos;
114
115 /*
116 * We expect a node path, one or more spaces, a command, one or more
117 * spaces and an ascii netgraph structure.
118 */
119 data += strspn(data, " \t");
120 len = strcspn(data, " \t");
121 if (len >= sizeof path) {
122 log_Printf(LogWARN, "%s: %.*s: Node path too long\n",
123 dev->dev.name, len, data);
124 return 0;
125 }
126 memcpy(path, data, len);
127 path[len] = '\0';
128 data += len;
129
130 data += strspn(data, " \t");
131 len = strcspn(data, " \t");
132 for (pos = len; pos >= 0; pos--)
133 if (data[pos] == '%')
134 len++;
135 if ((fmt = alloca(len + 4)) == NULL) {
136 log_Printf(LogWARN, "%s: alloca(%d) failure... %s\n",
137 dev->dev.name, len + 4, strerror(errno));
138 return 0;
139 }
140
141 /*
142 * This is probably a waste of time, but we really don't want to end
143 * up stuffing unexpected % escapes into the kernel....
144 */
145 for (pos = dpos = 0; pos < (int)len;) {
146 if (data[dpos] == '%')
147 fmt[pos++] = '%';
148 fmt[pos++] = data[dpos++];
149 }
150 strcpy(fmt + pos, " %s");
151 data += dpos;
152
153 data += strspn(data, " \t");
154 if (NgSendAsciiMsg(dev->cs, path, fmt, data) < 0) {
155 log_Printf(LogDEBUG, "%s: NgSendAsciiMsg (to %s): \"%s\", \"%s\": %s\n",
156 dev->dev.name, path, fmt, data, strerror(errno));
157 return 0;
158 }
159
160 return 1;
161 }
162
163 /*
164 * Get a netgraph message
165 */
166 static ssize_t
ng_MessageIn(struct physical * p,char * buf,size_t sz)167 ng_MessageIn(struct physical *p, char *buf, size_t sz)
168 {
169 char msgbuf[sizeof(struct ng_mesg) * 2 + NG_MSGBUFSZ];
170 struct ngdevice *dev = device2ng(p->handler);
171 struct ng_mesg *rep = (struct ng_mesg *)msgbuf;
172 char path[NG_PATHSIZ];
173 size_t len;
174
175 #ifdef BROKEN_SELECT
176 struct timeval t;
177 fd_set *r;
178 int ret;
179
180 if (dev->cs < 0)
181 return 0;
182
183 if ((r = mkfdset()) == NULL) {
184 log_Printf(LogERROR, "DoLoop: Cannot create fd_set\n");
185 return -1;
186 }
187 zerofdset(r);
188 FD_SET(dev->cs, r);
189 t.tv_sec = t.tv_usec = 0;
190 ret = select(dev->cs + 1, r, NULL, NULL, &t);
191 free(r);
192
193 if (ret <= 0)
194 return 0;
195 #endif
196
197 if (NgRecvAsciiMsg(dev->cs, rep, sizeof msgbuf, path)) {
198 log_Printf(LogWARN, "%s: NgRecvAsciiMsg: %s\n",
199 dev->dev.name, strerror(errno));
200 return -1;
201 }
202
203 /* XXX: Should we check rep->header.version ? */
204
205 if (sz == 0)
206 log_Printf(LogWARN, "%s: Unexpected message: %s\n", dev->dev.name,
207 rep->header.cmdstr);
208 else {
209 log_Printf(LogDEBUG, "%s: Received message: %s\n", dev->dev.name,
210 rep->header.cmdstr);
211 len = strlen(rep->header.cmdstr);
212 if (sz > len)
213 sz = len;
214 memcpy(buf, rep->header.cmdstr, sz);
215 }
216
217 return sz;
218 }
219
220 static ssize_t
ng_Write(struct physical * p,const void * v,size_t n)221 ng_Write(struct physical *p, const void *v, size_t n)
222 {
223 struct ngdevice *dev = device2ng(p->handler);
224
225 switch (p->dl->state) {
226 case DATALINK_DIAL:
227 case DATALINK_LOGIN:
228 return ng_MessageOut(dev, v) ? (ssize_t)n : -1;
229 }
230 return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : (ssize_t)n;
231 }
232
233 static ssize_t
ng_Read(struct physical * p,void * v,size_t n)234 ng_Read(struct physical *p, void *v, size_t n)
235 {
236 char hook[NG_HOOKSIZ];
237
238 switch (p->dl->state) {
239 case DATALINK_DIAL:
240 case DATALINK_LOGIN:
241 return ng_MessageIn(p, v, n);
242 }
243
244 return NgRecvData(p->fd, v, n, hook);
245 }
246
247 static int
ng_RemoveFromSet(struct physical * p,fd_set * r,fd_set * w,fd_set * e)248 ng_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e)
249 {
250 struct ngdevice *dev = device2ng(p->handler);
251 int result;
252
253 if (r && dev->cs >= 0 && FD_ISSET(dev->cs, r)) {
254 FD_CLR(dev->cs, r);
255 log_Printf(LogTIMER, "%s: fdunset(ctrl) %d\n", p->link.name, dev->cs);
256 result = 1;
257 } else
258 result = 0;
259
260 /* Careful... physical_RemoveFromSet() called us ! */
261
262 p->handler->removefromset = NULL;
263 result += physical_RemoveFromSet(p, r, w, e);
264 p->handler->removefromset = ng_RemoveFromSet;
265
266 return result;
267 }
268
269 static void
ng_Free(struct physical * p)270 ng_Free(struct physical *p)
271 {
272 struct ngdevice *dev = device2ng(p->handler);
273
274 physical_SetDescriptor(p);
275 if (dev->cs != -1)
276 close(dev->cs);
277 free(dev);
278 }
279
280 static void
ng_device2iov(struct device * d,struct iovec * iov,int * niov,int maxiov __unused,int * auxfd,int * nauxfd)281 ng_device2iov(struct device *d, struct iovec *iov, int *niov,
282 int maxiov __unused, int *auxfd, int *nauxfd)
283 {
284 struct ngdevice *dev;
285 int sz = physical_MaxDeviceSize();
286
287 iov[*niov].iov_base = d = realloc(d, sz);
288 if (d == NULL) {
289 log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
290 AbortProgram(EX_OSERR);
291 }
292 iov[*niov].iov_len = sz;
293 (*niov)++;
294
295 dev = device2ng(d);
296 *auxfd = dev->cs;
297 (*nauxfd)++;
298 }
299
300 static const struct device basengdevice = {
301 NG_DEVICE,
302 "netgraph",
303 0,
304 { CD_REQUIRED, DEF_NGCDDELAY },
305 NULL,
306 ng_RemoveFromSet,
307 NULL,
308 NULL,
309 NULL,
310 NULL,
311 NULL,
312 ng_Free,
313 ng_Read,
314 ng_Write,
315 ng_device2iov,
316 NULL,
317 NULL,
318 NULL
319 };
320
321 struct device *
ng_iov2device(int type,struct physical * p,struct iovec * iov,int * niov,int maxiov __unused,int * auxfd,int * nauxfd)322 ng_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
323 int maxiov __unused, int *auxfd, int *nauxfd)
324 {
325 if (type == NG_DEVICE) {
326 struct ngdevice *dev = (struct ngdevice *)iov[(*niov)++].iov_base;
327
328 dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */
329 if (dev == NULL) {
330 log_Printf(LogALERT, "Failed to allocate memory: %d\n",
331 (int)(sizeof *dev));
332 AbortProgram(EX_OSERR);
333 }
334
335 if (*nauxfd) {
336 dev->cs = *auxfd;
337 (*nauxfd)--;
338 } else
339 dev->cs = -1;
340
341 /* Refresh function pointers etc */
342 memcpy(&dev->dev, &basengdevice, sizeof dev->dev);
343
344 /* XXX: Are netgraph always synchronous ? */
345 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
346 return &dev->dev;
347 }
348
349 return NULL;
350 }
351
352 static int
ng_UpdateSet(struct fdescriptor * d,fd_set * r,fd_set * w,fd_set * e,int * n)353 ng_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
354 {
355 struct physical *p = descriptor2physical(d);
356 struct ngdevice *dev = device2ng(p->handler);
357 int result;
358
359 switch (p->dl->state) {
360 case DATALINK_DIAL:
361 case DATALINK_LOGIN:
362 if (r) {
363 FD_SET(dev->cs, r);
364 log_Printf(LogTIMER, "%s(ctrl): fdset(r) %d\n", p->link.name, dev->cs);
365 result = 1;
366 } else
367 result = 0;
368 break;
369
370 default:
371 result = physical_doUpdateSet(d, r, w, e, n, 0);
372 break;
373 }
374
375 return result;
376 }
377
378 static int
ng_IsSet(struct fdescriptor * d,const fd_set * fdset)379 ng_IsSet(struct fdescriptor *d, const fd_set *fdset)
380 {
381 struct physical *p = descriptor2physical(d);
382 struct ngdevice *dev = device2ng(p->handler);
383 int result;
384
385 result = dev->cs >= 0 && FD_ISSET(dev->cs, fdset);
386 result += physical_IsSet(d, fdset);
387
388 return result;
389 }
390
391 static void
ng_DescriptorRead(struct fdescriptor * d,struct bundle * bundle,const fd_set * fdset)392 ng_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
393 const fd_set *fdset)
394 {
395 struct physical *p = descriptor2physical(d);
396 struct ngdevice *dev = device2ng(p->handler);
397
398 if (dev->cs >= 0 && FD_ISSET(dev->cs, fdset))
399 ng_MessageIn(p, NULL, 0);
400
401 if (physical_IsSet(d, fdset))
402 physical_DescriptorRead(d, bundle, fdset);
403 }
404
405 static struct device *
ng_Abandon(struct ngdevice * dev,struct physical * p)406 ng_Abandon(struct ngdevice *dev, struct physical *p)
407 {
408 /* Abandon our node construction */
409 close(dev->cs);
410 close(p->fd);
411 p->fd = -2; /* Nobody else need try.. */
412 free(dev);
413
414 return NULL;
415 }
416
417
418 /*
419 * Populate the ``word'' (of size ``sz'') named ``what'' from ``from''
420 * ending with any character from ``sep''. Point ``endp'' at the next
421 * word.
422 */
423
424 #define GETSEGMENT(what, from, sep, endp) \
425 getsegment(#what, (what), sizeof(what), from, sep, endp)
426
427 static int
getsegment(const char * what,char * word,size_t sz,const char * from,const char * sep,const char ** endp)428 getsegment(const char *what, char *word, size_t sz, const char *from,
429 const char *sep, const char **endp)
430 {
431 size_t len;
432
433 if ((len = strcspn(from, sep)) == 0) {
434 log_Printf(LogWARN, "%s name should not be empty !\n", what);
435 return 0;
436 }
437
438 if (len >= sz) {
439 log_Printf(LogWARN, "%s name too long, max %d !\n", what, sz - 1);
440 return 0;
441 }
442
443 strncpy(word, from, len);
444 word[len] = '\0';
445
446 *endp = from + len;
447 *endp += strspn(*endp, sep);
448
449 return 1;
450 }
451
452 struct device *
ng_Create(struct physical * p)453 ng_Create(struct physical *p)
454 {
455 struct sockaddr_ng ngsock;
456 u_char rbuf[2048];
457 struct sockaddr *sock = (struct sockaddr *)&ngsock;
458 const struct hooklist *hlist;
459 const struct nodeinfo *ninfo;
460 const struct linkinfo *nlink;
461 struct ngdevice *dev;
462 struct ng_mesg *resp;
463 struct ngm_mkpeer mkp;
464 struct ngm_connect ngc;
465 const char *devp, *endp;
466 char lasthook[NG_HOOKSIZ];
467 char hook[NG_HOOKSIZ];
468 char nodetype[NG_TYPESIZ + NG_NODESIZ];
469 char modname[NG_TYPESIZ + 3];
470 char path[NG_PATHSIZ];
471 char *nodename;
472 int len, sz, done;
473 unsigned f;
474
475 dev = NULL;
476 if (p->fd < 0 && !strncasecmp(p->name.full, NETGRAPH_PREFIX,
477 sizeof NETGRAPH_PREFIX - 1)) {
478 p->fd--; /* We own the device - change fd */
479
480 if ((dev = malloc(sizeof *dev)) == NULL)
481 return NULL;
482
483 loadmodules(LOAD_VERBOSLY, "netgraph", "ng_socket", NULL);
484
485 /* Create a socket node */
486 if (ID0NgMkSockNode(NULL, &dev->cs, &p->fd) == -1) {
487 log_Printf(LogWARN, "Cannot create netgraph socket node: %s\n",
488 strerror(errno));
489 free(dev);
490 p->fd = -2;
491 return NULL;
492 }
493
494 devp = p->name.full + sizeof NETGRAPH_PREFIX - 1;
495 *lasthook = *path = '\0';
496 log_Printf(LogDEBUG, "%s: Opening netgraph device \"%s\"\n",
497 p->link.name, devp);
498 done = 0;
499
500 while (*devp != '\0' && !done) {
501 if (*devp != '[') {
502 if (*lasthook == '\0') {
503 log_Printf(LogWARN, "%s: Netgraph devices must start with"
504 " [nodetype:nodename]\n", p->link.name);
505 return ng_Abandon(dev, p);
506 }
507
508 /* Get the hook name of the new node */
509 if (!GETSEGMENT(hook, devp, ".[", &endp))
510 return ng_Abandon(dev, p);
511 log_Printf(LogDEBUG, "%s: Got hook \"%s\"\n", p->link.name, hook);
512 devp = endp;
513 if (*devp == '\0') {
514 log_Printf(LogWARN, "%s: Netgraph device must not end with a second"
515 " hook\n", p->link.name);
516 return ng_Abandon(dev, p);
517 }
518 if (devp[-1] != '[') {
519 log_Printf(LogWARN, "%s: Expected a [nodetype:nodename] at device"
520 " pos %d\n", p->link.name, devp - p->link.name - 1);
521 return ng_Abandon(dev, p);
522 }
523 } else {
524 /* Use lasthook as the hook name */
525 strcpy(hook, lasthook);
526 devp++;
527 }
528
529 /* We've got ``lasthook'' and ``hook'', get the node type */
530 if (!GETSEGMENT(nodetype, devp, "]", &endp))
531 return ng_Abandon(dev, p);
532 log_Printf(LogDEBUG, "%s: Got node \"%s\"\n", p->link.name, nodetype);
533
534 if ((nodename = strchr(nodetype, ':')) != NULL) {
535 *nodename++ = '\0';
536 if (*nodename == '\0' && *nodetype == '\0') {
537 log_Printf(LogWARN, "%s: Empty [nodetype:nodename] at device"
538 " pos %d\n", p->link.name, devp - p->link.name - 1);
539 return ng_Abandon(dev, p);
540 }
541 }
542
543 /* Ignore optional colons after nodes */
544 devp = *endp == ':' ? endp + 1 : endp;
545 if (*devp == '.')
546 devp++;
547
548 if (*lasthook == '\0') {
549 /* This is the first node in the chain */
550 if (nodename == NULL || *nodename == '\0') {
551 log_Printf(LogWARN, "%s: %s: No initial device nodename\n",
552 p->link.name, devp);
553 return ng_Abandon(dev, p);
554 }
555
556 if (*nodetype != '\0') {
557 /* Attempt to load the module */
558 snprintf(modname, sizeof modname, "ng_%s", nodetype);
559 log_Printf(LogDEBUG, "%s: Attempting to load %s.ko\n",
560 p->link.name, modname);
561 loadmodules(LOAD_QUIETLY, modname, NULL);
562 }
563
564 snprintf(path, sizeof path, "%s:", nodename);
565 /* XXX: If we have a node type, ensure it's correct */
566 } else {
567 /*
568 * Ask for a list of hooks attached to the previous node. If we
569 * find the one we're interested in, and if it's connected to a
570 * node of the right type using the correct hook, use that.
571 * If we find the hook connected to something else, fail.
572 * If we find no match, mkpeer the new node.
573 */
574 if (*nodetype == '\0') {
575 log_Printf(LogWARN, "%s: Nodetype missing at device offset %d\n",
576 p->link.name,
577 devp - p->name.full + sizeof NETGRAPH_PREFIX - 1);
578 return ng_Abandon(dev, p);
579 }
580
581 /* Get a list of node hooks */
582 if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS,
583 NULL, 0) < 0) {
584 log_Printf(LogWARN, "%s: %s Cannot send a LISTHOOOKS message: %s\n",
585 p->link.name, path, strerror(errno));
586 return ng_Abandon(dev, p);
587 }
588
589 /* Get our list back */
590 resp = (struct ng_mesg *)rbuf;
591 if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) <= 0) {
592 log_Printf(LogWARN, "%s: Cannot get netgraph response: %s\n",
593 p->link.name, strerror(errno));
594 return ng_Abandon(dev, p);
595 }
596
597 hlist = (const struct hooklist *)resp->data;
598 ninfo = &hlist->nodeinfo;
599
600 log_Printf(LogDEBUG, "List of netgraph node ``%s'' (id %x) hooks:\n",
601 path, ninfo->id);
602
603 /* look for a hook already attached. */
604 for (f = 0; f < ninfo->hooks; f++) {
605 nlink = &hlist->link[f];
606
607 log_Printf(LogDEBUG, " Found %s -> %s (type %s)\n", nlink->ourhook,
608 nlink->peerhook, nlink->nodeinfo.type);
609
610 if (!strcmp(nlink->ourhook, lasthook)) {
611 if (strcmp(nlink->peerhook, hook) ||
612 strcmp(nlink->nodeinfo.type, nodetype)) {
613 log_Printf(LogWARN, "%s: hook %s:%s is already in use\n",
614 p->link.name, nlink->ourhook, path);
615 return ng_Abandon(dev, p);
616 }
617 /* The node is already hooked up nicely.... reuse it */
618 break;
619 }
620 }
621
622 if (f == ninfo->hooks) {
623 /* Attempt to load the module */
624 snprintf(modname, sizeof modname, "ng_%s", nodetype);
625 log_Printf(LogDEBUG, "%s: Attempting to load %s.ko\n",
626 p->link.name, modname);
627 loadmodules(LOAD_QUIETLY, modname, NULL);
628
629 /* Create (mkpeer) the new node */
630
631 snprintf(mkp.type, sizeof mkp.type, "%s", nodetype);
632 snprintf(mkp.ourhook, sizeof mkp.ourhook, "%s", lasthook);
633 snprintf(mkp.peerhook, sizeof mkp.peerhook, "%s", hook);
634
635 log_Printf(LogDEBUG, "%s: Doing MKPEER %s%s -> %s (type %s)\n",
636 p->link.name, path, mkp.ourhook, mkp.peerhook, nodetype);
637
638 if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE,
639 NGM_MKPEER, &mkp, sizeof mkp) < 0) {
640 log_Printf(LogWARN, "%s Cannot create %s netgraph node: %s\n",
641 path, nodetype, strerror(errno));
642 return ng_Abandon(dev, p);
643 }
644 }
645 len = strlen(path);
646 snprintf(path + len, sizeof path - len, "%s%s",
647 path[len - 1] == ':' ? "" : ".", lasthook);
648 }
649
650 /* Get a list of node hooks */
651 if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS,
652 NULL, 0) < 0) {
653 log_Printf(LogWARN, "%s: %s Cannot send a LISTHOOOKS message: %s\n",
654 p->link.name, path, strerror(errno));
655 return ng_Abandon(dev, p);
656 }
657
658 /* Get our list back */
659 resp = (struct ng_mesg *)rbuf;
660 if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) <= 0) {
661 log_Printf(LogWARN, "%s: Cannot get netgraph response: %s\n",
662 p->link.name, strerror(errno));
663 return ng_Abandon(dev, p);
664 }
665
666 hlist = (const struct hooklist *)resp->data;
667 ninfo = &hlist->nodeinfo;
668
669 if (*lasthook != '\0' && nodename != NULL && *nodename != '\0' &&
670 strcmp(ninfo->name, nodename) &&
671 NgNameNode(dev->cs, path, "%s", nodename) < 0) {
672 log_Printf(LogWARN, "%s: %s: Cannot name netgraph node: %s\n",
673 p->link.name, path, strerror(errno));
674 return ng_Abandon(dev, p);
675 }
676
677 if (!GETSEGMENT(lasthook, devp, " \t.[", &endp))
678 return ng_Abandon(dev, p);
679 log_Printf(LogDEBUG, "%s: Got hook \"%s\"\n", p->link.name, lasthook);
680
681 len = strlen(lasthook);
682 done = strchr(" \t", devp[len]) ? 1 : 0;
683 devp = endp;
684
685 if (*devp != '\0') {
686 if (devp[-1] == '[')
687 devp--;
688 } /* else should moan about devp[-1] being '[' ? */
689 }
690
691 snprintf(dev->hook, sizeof dev->hook, "%s", lasthook);
692
693 /* Connect the node to our socket node */
694 snprintf(ngc.path, sizeof ngc.path, "%s", path);
695 snprintf(ngc.ourhook, sizeof ngc.ourhook, "%s", dev->hook);
696 memcpy(ngc.peerhook, ngc.ourhook, sizeof ngc.peerhook);
697
698 log_Printf(LogDEBUG, "Connecting netgraph socket .:%s -> %s.%s\n",
699 ngc.ourhook, ngc.path, ngc.peerhook);
700 if (NgSendMsg(dev->cs, ".:", NGM_GENERIC_COOKIE,
701 NGM_CONNECT, &ngc, sizeof ngc) < 0) {
702 log_Printf(LogWARN, "Cannot connect %s and socket netgraph "
703 "nodes: %s\n", path, strerror(errno));
704 return ng_Abandon(dev, p);
705 }
706
707 /* Hook things up so that we monitor dev->cs */
708 p->desc.UpdateSet = ng_UpdateSet;
709 p->desc.IsSet = ng_IsSet;
710 p->desc.Read = ng_DescriptorRead;
711
712 memcpy(&dev->dev, &basengdevice, sizeof dev->dev);
713
714 } else {
715 /* See if we're a netgraph socket */
716
717 sz = sizeof ngsock;
718 if (getsockname(p->fd, sock, &sz) != -1 && sock->sa_family == AF_NETGRAPH) {
719 /*
720 * It's a netgraph node... We can't determine hook names etc, so we
721 * stay pretty impartial....
722 */
723 log_Printf(LogPHASE, "%s: Link is a netgraph node\n", p->link.name);
724
725 if ((dev = malloc(sizeof *dev)) == NULL) {
726 log_Printf(LogWARN, "%s: Cannot allocate an ether device: %s\n",
727 p->link.name, strerror(errno));
728 return NULL;
729 }
730
731 memcpy(&dev->dev, &basengdevice, sizeof dev->dev);
732 dev->cs = -1;
733 *dev->hook = '\0';
734 }
735 }
736
737 if (dev) {
738 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
739 return &dev->dev;
740 }
741
742 return NULL;
743 }
744