1 /*
2 * ng_iface.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: Archie Cobbs <archie@freebsd.org>
39 *
40 * $FreeBSD: releng/6.0/sys/netgraph/ng_iface.c 149443 2005-08-25 05:01:24Z rwatson $
41 * $Whistle: ng_iface.c,v 1.33 1999/11/01 09:24:51 julian Exp $
42 */
43
44 /*
45 * This node is also a system networking interface. It has
46 * a hook for each protocol (IP, AppleTalk, IPX, etc). Packets
47 * are simply relayed between the interface and the hooks.
48 *
49 * Interfaces are named ng0, ng1, etc. New nodes take the
50 * first available interface name.
51 *
52 * This node also includes Berkeley packet filter support.
53 */
54
55 #include "opt_atalk.h"
56 #include "opt_inet.h"
57 #include "opt_inet6.h"
58 #include "opt_ipx.h"
59
60 #include <sys/param.h>
61 #include <sys/systm.h>
62 #include <sys/errno.h>
63 #include <sys/kernel.h>
64 #include <sys/malloc.h>
65 #include <sys/mbuf.h>
66 #include <sys/errno.h>
67 #include <sys/random.h>
68 #include <sys/sockio.h>
69 #include <sys/socket.h>
70 #include <sys/syslog.h>
71 #include <sys/libkern.h>
72
73 #include <net/if.h>
74 #include <net/if_types.h>
75 #include <net/bpf.h>
76 #include <net/netisr.h>
77
78 #include <netinet/in.h>
79
80 #include <netgraph/ng_message.h>
81 #include <netgraph/netgraph.h>
82 #include <netgraph/ng_parse.h>
83 #include <netgraph/ng_iface.h>
84 #include <netgraph/ng_cisco.h>
85
86 #ifdef NG_SEPARATE_MALLOC
87 MALLOC_DEFINE(M_NETGRAPH_IFACE, "netgraph_iface", "netgraph iface node ");
88 #else
89 #define M_NETGRAPH_IFACE M_NETGRAPH
90 #endif
91
92 /* This struct describes one address family */
93 struct iffam {
94 sa_family_t family; /* Address family */
95 const char *hookname; /* Name for hook */
96 };
97 typedef const struct iffam *iffam_p;
98
99 /* List of address families supported by our interface */
100 const static struct iffam gFamilies[] = {
101 { AF_INET, NG_IFACE_HOOK_INET },
102 { AF_INET6, NG_IFACE_HOOK_INET6 },
103 { AF_APPLETALK, NG_IFACE_HOOK_ATALK },
104 { AF_IPX, NG_IFACE_HOOK_IPX },
105 { AF_ATM, NG_IFACE_HOOK_ATM },
106 { AF_NATM, NG_IFACE_HOOK_NATM },
107 };
108 #define NUM_FAMILIES (sizeof(gFamilies) / sizeof(*gFamilies))
109
110 /* Node private data */
111 struct ng_iface_private {
112 struct ifnet *ifp; /* Our interface */
113 int unit; /* Interface unit number */
114 node_p node; /* Our netgraph node */
115 hook_p hooks[NUM_FAMILIES]; /* Hook for each address family */
116 };
117 typedef struct ng_iface_private *priv_p;
118
119 /* Interface methods */
120 static void ng_iface_start(struct ifnet *ifp);
121 static int ng_iface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
122 static int ng_iface_output(struct ifnet *ifp, struct mbuf *m0,
123 struct sockaddr *dst, struct rtentry *rt0);
124 static void ng_iface_bpftap(struct ifnet *ifp,
125 struct mbuf *m, sa_family_t family);
126 #ifdef DEBUG
127 static void ng_iface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
128 #endif
129
130 /* Netgraph methods */
131 static int ng_iface_mod_event(module_t, int, void *);
132 static ng_constructor_t ng_iface_constructor;
133 static ng_rcvmsg_t ng_iface_rcvmsg;
134 static ng_shutdown_t ng_iface_shutdown;
135 static ng_newhook_t ng_iface_newhook;
136 static ng_rcvdata_t ng_iface_rcvdata;
137 static ng_disconnect_t ng_iface_disconnect;
138
139 /* Helper stuff */
140 static iffam_p get_iffam_from_af(sa_family_t family);
141 static iffam_p get_iffam_from_hook(priv_p priv, hook_p hook);
142 static iffam_p get_iffam_from_name(const char *name);
143 static hook_p *get_hook_from_iffam(priv_p priv, iffam_p iffam);
144
145 /* Parse type for struct ng_cisco_ipaddr */
146 static const struct ng_parse_struct_field ng_cisco_ipaddr_type_fields[]
147 = NG_CISCO_IPADDR_TYPE_INFO;
148 static const struct ng_parse_type ng_cisco_ipaddr_type = {
149 &ng_parse_struct_type,
150 &ng_cisco_ipaddr_type_fields
151 };
152
153 /* List of commands and how to convert arguments to/from ASCII */
154 static const struct ng_cmdlist ng_iface_cmds[] = {
155 {
156 NGM_IFACE_COOKIE,
157 NGM_IFACE_GET_IFNAME,
158 "getifname",
159 NULL,
160 &ng_parse_string_type
161 },
162 {
163 NGM_IFACE_COOKIE,
164 NGM_IFACE_POINT2POINT,
165 "point2point",
166 NULL,
167 NULL
168 },
169 {
170 NGM_IFACE_COOKIE,
171 NGM_IFACE_BROADCAST,
172 "broadcast",
173 NULL,
174 NULL
175 },
176 {
177 NGM_CISCO_COOKIE,
178 NGM_CISCO_GET_IPADDR,
179 "getipaddr",
180 NULL,
181 &ng_cisco_ipaddr_type
182 },
183 {
184 NGM_IFACE_COOKIE,
185 NGM_IFACE_GET_IFINDEX,
186 "getifindex",
187 NULL,
188 &ng_parse_uint32_type
189 },
190 { 0 }
191 };
192
193 /* Node type descriptor */
194 static struct ng_type typestruct = {
195 .version = NG_ABI_VERSION,
196 .name = NG_IFACE_NODE_TYPE,
197 .mod_event = ng_iface_mod_event,
198 .constructor = ng_iface_constructor,
199 .rcvmsg = ng_iface_rcvmsg,
200 .shutdown = ng_iface_shutdown,
201 .newhook = ng_iface_newhook,
202 .rcvdata = ng_iface_rcvdata,
203 .disconnect = ng_iface_disconnect,
204 .cmdlist = ng_iface_cmds,
205 };
206 NETGRAPH_INIT(iface, &typestruct);
207
208 static struct unrhdr *ng_iface_unit;
209
210 /************************************************************************
211 HELPER STUFF
212 ************************************************************************/
213
214 /*
215 * Get the family descriptor from the family ID
216 */
217 static __inline iffam_p
218 get_iffam_from_af(sa_family_t family)
219 {
220 iffam_p iffam;
221 int k;
222
223 for (k = 0; k < NUM_FAMILIES; k++) {
224 iffam = &gFamilies[k];
225 if (iffam->family == family)
226 return (iffam);
227 }
228 return (NULL);
229 }
230
231 /*
232 * Get the family descriptor from the hook
233 */
234 static __inline iffam_p
235 get_iffam_from_hook(priv_p priv, hook_p hook)
236 {
237 int k;
238
239 for (k = 0; k < NUM_FAMILIES; k++)
240 if (priv->hooks[k] == hook)
241 return (&gFamilies[k]);
242 return (NULL);
243 }
244
245 /*
246 * Get the hook from the iffam descriptor
247 */
248
249 static __inline hook_p *
250 get_hook_from_iffam(priv_p priv, iffam_p iffam)
251 {
252 return (&priv->hooks[iffam - gFamilies]);
253 }
254
255 /*
256 * Get the iffam descriptor from the name
257 */
258 static __inline iffam_p
259 get_iffam_from_name(const char *name)
260 {
261 iffam_p iffam;
262 int k;
263
264 for (k = 0; k < NUM_FAMILIES; k++) {
265 iffam = &gFamilies[k];
266 if (!strcmp(iffam->hookname, name))
267 return (iffam);
268 }
269 return (NULL);
270 }
271
272 /************************************************************************
273 INTERFACE STUFF
274 ************************************************************************/
275
276 /*
277 * Process an ioctl for the virtual interface
278 */
279 static int
280 ng_iface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
281 {
282 struct ifreq *const ifr = (struct ifreq *) data;
283 int s, error = 0;
284
285 #ifdef DEBUG
286 ng_iface_print_ioctl(ifp, command, data);
287 #endif
288 s = splimp();
289 switch (command) {
290
291 /* These two are mostly handled at a higher layer */
292 case SIOCSIFADDR:
293 ifp->if_flags |= IFF_UP;
294 ifp->if_drv_flags |= IFF_DRV_RUNNING;
295 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE);
296 break;
297 case SIOCGIFADDR:
298 break;
299
300 /* Set flags */
301 case SIOCSIFFLAGS:
302 /*
303 * If the interface is marked up and stopped, then start it.
304 * If it is marked down and running, then stop it.
305 */
306 if (ifr->ifr_flags & IFF_UP) {
307 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
308 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE);
309 ifp->if_drv_flags |= IFF_DRV_RUNNING;
310 }
311 } else {
312 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
313 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING |
314 IFF_DRV_OACTIVE);
315 }
316 break;
317
318 /* Set the interface MTU */
319 case SIOCSIFMTU:
320 if (ifr->ifr_mtu > NG_IFACE_MTU_MAX
321 || ifr->ifr_mtu < NG_IFACE_MTU_MIN)
322 error = EINVAL;
323 else
324 ifp->if_mtu = ifr->ifr_mtu;
325 break;
326
327 /* Stuff that's not supported */
328 case SIOCADDMULTI:
329 case SIOCDELMULTI:
330 error = 0;
331 break;
332 case SIOCSIFPHYS:
333 error = EOPNOTSUPP;
334 break;
335
336 default:
337 error = EINVAL;
338 break;
339 }
340 (void) splx(s);
341 return (error);
342 }
343
344 /*
345 * This routine is called to deliver a packet out the interface.
346 * We simply look at the address family and relay the packet to
347 * the corresponding hook, if it exists and is connected.
348 */
349
350 static int
351 ng_iface_output(struct ifnet *ifp, struct mbuf *m,
352 struct sockaddr *dst, struct rtentry *rt0)
353 {
354 const priv_p priv = (priv_p) ifp->if_softc;
355 const iffam_p iffam = get_iffam_from_af(dst->sa_family);
356 int len, error = 0;
357 u_int32_t af;
358
359 /* Check interface flags */
360 if (!((ifp->if_flags & IFF_UP) &&
361 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
362 m_freem(m);
363 return (ENETDOWN);
364 }
365
366 /* BPF writes need to be handled specially. */
367 if (dst->sa_family == AF_UNSPEC) {
368 bcopy(dst->sa_data, &af, sizeof(af));
369 dst->sa_family = af;
370 }
371
372 /* Berkeley packet filter */
373 ng_iface_bpftap(ifp, m, dst->sa_family);
374
375 /* Check address family to determine hook (if known) */
376 if (iffam == NULL) {
377 m_freem(m);
378 log(LOG_WARNING, "%s: can't handle af%d\n",
379 ifp->if_xname, (int)dst->sa_family);
380 return (EAFNOSUPPORT);
381 }
382
383 /* Copy length before the mbuf gets invalidated */
384 len = m->m_pkthdr.len;
385
386 /* Send packet; if hook is not connected, mbuf will get freed. */
387 NG_SEND_DATA_ONLY(error, *get_hook_from_iffam(priv, iffam), m);
388
389 /* Update stats */
390 if (error == 0) {
391 ifp->if_obytes += len;
392 ifp->if_opackets++;
393 }
394 return (error);
395 }
396
397 /*
398 * This routine should never be called
399 */
400
401 static void
402 ng_iface_start(struct ifnet *ifp)
403 {
404 if_printf(ifp, "%s called?", __func__);
405 }
406
407 /*
408 * Flash a packet by the BPF (requires prepending 4 byte AF header)
409 * Note the phoney mbuf; this is OK because BPF treats it read-only.
410 */
411 static void
412 ng_iface_bpftap(struct ifnet *ifp, struct mbuf *m, sa_family_t family)
413 {
414 KASSERT(family != AF_UNSPEC, ("%s: family=AF_UNSPEC", __func__));
415 if (ifp->if_bpf != NULL) {
416 int32_t family4 = (int32_t)family;
417 bpf_mtap2(ifp->if_bpf, &family4, sizeof(family4), m);
418 }
419 }
420
421 #ifdef DEBUG
422 /*
423 * Display an ioctl to the virtual interface
424 */
425
426 static void
427 ng_iface_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
428 {
429 char *str;
430
431 switch (command & IOC_DIRMASK) {
432 case IOC_VOID:
433 str = "IO";
434 break;
435 case IOC_OUT:
436 str = "IOR";
437 break;
438 case IOC_IN:
439 str = "IOW";
440 break;
441 case IOC_INOUT:
442 str = "IORW";
443 break;
444 default:
445 str = "IO??";
446 }
447 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
448 ifp->if_xname,
449 str,
450 IOCGROUP(command),
451 command & 0xff,
452 IOCPARM_LEN(command));
453 }
454 #endif /* DEBUG */
455
456 /************************************************************************
457 NETGRAPH NODE STUFF
458 ************************************************************************/
459
460 /*
461 * Constructor for a node
462 */
463 static int
464 ng_iface_constructor(node_p node)
465 {
466 struct ifnet *ifp;
467 priv_p priv;
468
469 /* Allocate node and interface private structures */
470 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH_IFACE, M_NOWAIT|M_ZERO);
471 if (priv == NULL)
472 return (ENOMEM);
473 ifp = if_alloc(IFT_PROPVIRTUAL);
474 if (ifp == NULL) {
475 FREE(priv, M_NETGRAPH_IFACE);
476 return (ENOMEM);
477 }
478
479 /* Link them together */
480 ifp->if_softc = priv;
481 priv->ifp = ifp;
482
483 /* Get an interface unit number */
484 priv->unit = alloc_unr(ng_iface_unit);
485
486 /* Link together node and private info */
487 NG_NODE_SET_PRIVATE(node, priv);
488 priv->node = node;
489
490 /* Initialize interface structure */
491 if_initname(ifp, NG_IFACE_IFACE_NAME, priv->unit);
492 ifp->if_output = ng_iface_output;
493 ifp->if_start = ng_iface_start;
494 ifp->if_ioctl = ng_iface_ioctl;
495 ifp->if_watchdog = NULL;
496 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
497 ifp->if_mtu = NG_IFACE_MTU_DEFAULT;
498 ifp->if_flags = (IFF_SIMPLEX|IFF_POINTOPOINT|IFF_NOARP|IFF_MULTICAST);
499 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */
500 ifp->if_addrlen = 0; /* XXX */
501 ifp->if_hdrlen = 0; /* XXX */
502 ifp->if_baudrate = 64000; /* XXX */
503
504 /* Give this node the same name as the interface (if possible) */
505 if (ng_name_node(node, ifp->if_xname) != 0)
506 log(LOG_WARNING, "%s: can't acquire netgraph name\n",
507 ifp->if_xname);
508
509 /* Attach the interface */
510 if_attach(ifp);
511 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
512
513 /* Done */
514 return (0);
515 }
516
517 /*
518 * Give our ok for a hook to be added
519 */
520 static int
521 ng_iface_newhook(node_p node, hook_p hook, const char *name)
522 {
523 const iffam_p iffam = get_iffam_from_name(name);
524 hook_p *hookptr;
525
526 if (iffam == NULL)
527 return (EPFNOSUPPORT);
528 hookptr = get_hook_from_iffam(NG_NODE_PRIVATE(node), iffam);
529 if (*hookptr != NULL)
530 return (EISCONN);
531 *hookptr = hook;
532 return (0);
533 }
534
535 /*
536 * Receive a control message
537 */
538 static int
539 ng_iface_rcvmsg(node_p node, item_p item, hook_p lasthook)
540 {
541 const priv_p priv = NG_NODE_PRIVATE(node);
542 struct ifnet *const ifp = priv->ifp;
543 struct ng_mesg *resp = NULL;
544 int error = 0;
545 struct ng_mesg *msg;
546
547 NGI_GET_MSG(item, msg);
548 switch (msg->header.typecookie) {
549 case NGM_IFACE_COOKIE:
550 switch (msg->header.cmd) {
551 case NGM_IFACE_GET_IFNAME:
552 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
553 if (resp == NULL) {
554 error = ENOMEM;
555 break;
556 }
557 strlcpy(resp->data, ifp->if_xname, IFNAMSIZ);
558 break;
559
560 case NGM_IFACE_POINT2POINT:
561 case NGM_IFACE_BROADCAST:
562 {
563
564 /* Deny request if interface is UP */
565 if ((ifp->if_flags & IFF_UP) != 0)
566 return (EBUSY);
567
568 /* Change flags */
569 switch (msg->header.cmd) {
570 case NGM_IFACE_POINT2POINT:
571 ifp->if_flags |= IFF_POINTOPOINT;
572 ifp->if_flags &= ~IFF_BROADCAST;
573 break;
574 case NGM_IFACE_BROADCAST:
575 ifp->if_flags &= ~IFF_POINTOPOINT;
576 ifp->if_flags |= IFF_BROADCAST;
577 break;
578 }
579 break;
580 }
581
582 case NGM_IFACE_GET_IFINDEX:
583 NG_MKRESPONSE(resp, msg, sizeof(uint32_t), M_NOWAIT);
584 if (resp == NULL) {
585 error = ENOMEM;
586 break;
587 }
588 *((uint32_t *)resp->data) = priv->ifp->if_index;
589 break;
590
591 default:
592 error = EINVAL;
593 break;
594 }
595 break;
596 case NGM_CISCO_COOKIE:
597 switch (msg->header.cmd) {
598 case NGM_CISCO_GET_IPADDR: /* we understand this too */
599 {
600 struct ifaddr *ifa;
601
602 /* Return the first configured IP address */
603 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
604 struct ng_cisco_ipaddr *ips;
605
606 if (ifa->ifa_addr->sa_family != AF_INET)
607 continue;
608 NG_MKRESPONSE(resp, msg, sizeof(ips), M_NOWAIT);
609 if (resp == NULL) {
610 error = ENOMEM;
611 break;
612 }
613 ips = (struct ng_cisco_ipaddr *)resp->data;
614 ips->ipaddr = ((struct sockaddr_in *)
615 ifa->ifa_addr)->sin_addr;
616 ips->netmask = ((struct sockaddr_in *)
617 ifa->ifa_netmask)->sin_addr;
618 break;
619 }
620
621 /* No IP addresses on this interface? */
622 if (ifa == NULL)
623 error = EADDRNOTAVAIL;
624 break;
625 }
626 default:
627 error = EINVAL;
628 break;
629 }
630 break;
631 case NGM_FLOW_COOKIE:
632 switch (msg->header.cmd) {
633 case NGM_LINK_IS_UP:
634 ifp->if_drv_flags |= IFF_DRV_RUNNING;
635 break;
636 case NGM_LINK_IS_DOWN:
637 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
638 break;
639 default:
640 break;
641 }
642 break;
643 default:
644 error = EINVAL;
645 break;
646 }
647 NG_RESPOND_MSG(error, node, item, resp);
648 NG_FREE_MSG(msg);
649 return (error);
650 }
651
652 /*
653 * Recive data from a hook. Pass the packet to the correct input routine.
654 */
655 static int
656 ng_iface_rcvdata(hook_p hook, item_p item)
657 {
658 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
659 const iffam_p iffam = get_iffam_from_hook(priv, hook);
660 struct ifnet *const ifp = priv->ifp;
661 struct mbuf *m;
662 int isr;
663
664 NGI_GET_M(item, m);
665 NG_FREE_ITEM(item);
666 /* Sanity checks */
667 KASSERT(iffam != NULL, ("%s: iffam", __func__));
668 M_ASSERTPKTHDR(m);
669 if ((ifp->if_flags & IFF_UP) == 0) {
670 NG_FREE_M(m);
671 return (ENETDOWN);
672 }
673
674 /* Update interface stats */
675 ifp->if_ipackets++;
676 ifp->if_ibytes += m->m_pkthdr.len;
677
678 /* Note receiving interface */
679 m->m_pkthdr.rcvif = ifp;
680
681 /* Berkeley packet filter */
682 ng_iface_bpftap(ifp, m, iffam->family);
683
684 /* Send packet */
685 switch (iffam->family) {
686 #ifdef INET
687 case AF_INET:
688 isr = NETISR_IP;
689 break;
690 #endif
691 #ifdef INET6
692 case AF_INET6:
693 isr = NETISR_IPV6;
694 break;
695 #endif
696 #ifdef IPX
697 case AF_IPX:
698 isr = NETISR_IPX;
699 break;
700 #endif
701 #ifdef NETATALK
702 case AF_APPLETALK:
703 isr = NETISR_ATALK2;
704 break;
705 #endif
706 default:
707 m_freem(m);
708 return (EAFNOSUPPORT);
709 }
710 /* First chunk of an mbuf contains good junk */
711 if (harvest.point_to_point)
712 random_harvest(m, 16, 3, 0, RANDOM_NET);
713 netisr_dispatch(isr, m);
714 return (0);
715 }
716
717 /*
718 * Shutdown and remove the node and its associated interface.
719 */
720 static int
721 ng_iface_shutdown(node_p node)
722 {
723 const priv_p priv = NG_NODE_PRIVATE(node);
724
725 bpfdetach(priv->ifp);
726 if_detach(priv->ifp);
727 if_free(priv->ifp);
728 priv->ifp = NULL;
729 free_unr(ng_iface_unit, priv->unit);
730 FREE(priv, M_NETGRAPH_IFACE);
731 NG_NODE_SET_PRIVATE(node, NULL);
732 NG_NODE_UNREF(node);
733 return (0);
734 }
735
736 /*
737 * Hook disconnection. Note that we do *not* shutdown when all
738 * hooks have been disconnected.
739 */
740 static int
741 ng_iface_disconnect(hook_p hook)
742 {
743 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
744 const iffam_p iffam = get_iffam_from_hook(priv, hook);
745
746 if (iffam == NULL)
747 panic(__func__);
748 *get_hook_from_iffam(priv, iffam) = NULL;
749 return (0);
750 }
751
752 /*
753 * Handle loading and unloading for this node type.
754 */
755 static int
756 ng_iface_mod_event(module_t mod, int event, void *data)
757 {
758 int error = 0;
759
760 switch (event) {
761 case MOD_LOAD:
762 ng_iface_unit = new_unrhdr(0, 0xffff, NULL);
763 break;
764 case MOD_UNLOAD:
765 delete_unrhdr(ng_iface_unit);
766 break;
767 default:
768 error = EOPNOTSUPP;
769 break;
770 }
771 return (error);
772 }
Cache object: 8800e79a75fda2b87b17653ab00a87a0
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