2/*
3 * ng_iface.c
4 *
5 * Copyright (c) 1996-1999 Whistle Communications, Inc.
6 * All rights reserved.
7 *
8 * Subject to the following obligations and disclaimer of warranty, use and
9 * redistribution of this software, in source or object code forms, with or
10 * without modifications are expressly permitted by Whistle Communications;
11 * provided, however, that:
12 * 1. Any and all reproductions of the source or object code must include the
13 * copyright notice above and the following disclaimer of warranties; and
14 * 2. No rights are granted, in any manner or form, to use Whistle
15 * Communications, Inc. trademarks, including the mark "WHISTLE
16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
17 * such appears in the above copyright notice or in the software.
18 *
19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
35 * OF SUCH DAMAGE.
36 *
37 * Author: Archie Cobbs <archie@freebsd.org>
38 *
| 1/*
2 * ng_iface.c
3 *
4 * Copyright (c) 1996-1999 Whistle Communications, Inc.
5 * All rights reserved.
6 *
7 * Subject to the following obligations and disclaimer of warranty, use and
8 * redistribution of this software, in source or object code forms, with or
9 * without modifications are expressly permitted by Whistle Communications;
10 * provided, however, that:
11 * 1. Any and all reproductions of the source or object code must include the
12 * copyright notice above and the following disclaimer of warranties; and
13 * 2. No rights are granted, in any manner or form, to use Whistle
14 * Communications, Inc. trademarks, including the mark "WHISTLE
15 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
16 * such appears in the above copyright notice or in the software.
17 *
18 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
19 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
20 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
21 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
23 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
24 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
25 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
26 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
27 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
28 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
29 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
34 * OF SUCH DAMAGE.
35 *
36 * Author: Archie Cobbs <archie@freebsd.org>
37 *
|
70
71#include <netinet/in.h>
72
73#include <netgraph/ng_message.h>
74#include <netgraph/netgraph.h>
75#include <netgraph/ng_parse.h>
76#include <netgraph/ng_iface.h>
77#include <netgraph/ng_cisco.h>
78
79#ifdef NG_SEPARATE_MALLOC
80MALLOC_DEFINE(M_NETGRAPH_IFACE, "netgraph_iface", "netgraph iface node ");
81#else
82#define M_NETGRAPH_IFACE M_NETGRAPH
83#endif
84
85/* This struct describes one address family */
86struct iffam {
87 sa_family_t family; /* Address family */
88 const char *hookname; /* Name for hook */
89};
90typedef const struct iffam *iffam_p;
91
92/* List of address families supported by our interface */
93const static struct iffam gFamilies[] = {
94 { AF_INET, NG_IFACE_HOOK_INET },
95 { AF_INET6, NG_IFACE_HOOK_INET6 },
96 { AF_APPLETALK, NG_IFACE_HOOK_ATALK },
97 { AF_IPX, NG_IFACE_HOOK_IPX },
98 { AF_ATM, NG_IFACE_HOOK_ATM },
99 { AF_NATM, NG_IFACE_HOOK_NATM },
100 { AF_NS, NG_IFACE_HOOK_NS },
101};
102#define NUM_FAMILIES (sizeof(gFamilies) / sizeof(*gFamilies))
103
104/* Node private data */
105struct ng_iface_private {
106 struct ifnet *ifp; /* Our interface */
107 int unit; /* Interface unit number */
108 node_p node; /* Our netgraph node */
109 hook_p hooks[NUM_FAMILIES]; /* Hook for each address family */
110};
111typedef struct ng_iface_private *priv_p;
112
113/* Interface methods */
114static void ng_iface_start(struct ifnet *ifp);
115static int ng_iface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
116static int ng_iface_output(struct ifnet *ifp, struct mbuf *m0,
117 struct sockaddr *dst, struct rtentry *rt0);
118static void ng_iface_bpftap(struct ifnet *ifp,
119 struct mbuf *m, sa_family_t family);
120#ifdef DEBUG
121static void ng_iface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
122#endif
123
124/* Netgraph methods */
125static ng_constructor_t ng_iface_constructor;
126static ng_rcvmsg_t ng_iface_rcvmsg;
127static ng_shutdown_t ng_iface_shutdown;
128static ng_newhook_t ng_iface_newhook;
129static ng_rcvdata_t ng_iface_rcvdata;
130static ng_disconnect_t ng_iface_disconnect;
131
132/* Helper stuff */
133static iffam_p get_iffam_from_af(sa_family_t family);
134static iffam_p get_iffam_from_hook(priv_p priv, hook_p hook);
135static iffam_p get_iffam_from_name(const char *name);
136static hook_p *get_hook_from_iffam(priv_p priv, iffam_p iffam);
137
138/* Parse type for struct ng_iface_ifname */
139static const struct ng_parse_fixedstring_info ng_iface_ifname_info = {
140 NG_IFACE_IFACE_NAME_MAX + 1
141};
142static const struct ng_parse_type ng_iface_ifname_type = {
143 &ng_parse_fixedstring_type,
144 &ng_iface_ifname_info
145};
146
147/* Parse type for struct ng_cisco_ipaddr */
148static const struct ng_parse_struct_field ng_cisco_ipaddr_type_fields[]
149 = NG_CISCO_IPADDR_TYPE_INFO;
150static const struct ng_parse_type ng_cisco_ipaddr_type = {
151 &ng_parse_struct_type,
152 &ng_cisco_ipaddr_type_fields
153};
154
155/* List of commands and how to convert arguments to/from ASCII */
156static const struct ng_cmdlist ng_iface_cmds[] = {
157 {
158 NGM_IFACE_COOKIE,
159 NGM_IFACE_GET_IFNAME,
160 "getifname",
161 NULL,
162 &ng_iface_ifname_type
163 },
164 {
165 NGM_IFACE_COOKIE,
166 NGM_IFACE_POINT2POINT,
167 "point2point",
168 NULL,
169 NULL
170 },
171 {
172 NGM_IFACE_COOKIE,
173 NGM_IFACE_BROADCAST,
174 "broadcast",
175 NULL,
176 NULL
177 },
178 {
179 NGM_CISCO_COOKIE,
180 NGM_CISCO_GET_IPADDR,
181 "getipaddr",
182 NULL,
183 &ng_cisco_ipaddr_type
184 },
185 { 0 }
186};
187
188/* Node type descriptor */
189static struct ng_type typestruct = {
190 NG_ABI_VERSION,
191 NG_IFACE_NODE_TYPE,
192 NULL,
193 ng_iface_constructor,
194 ng_iface_rcvmsg,
195 ng_iface_shutdown,
196 ng_iface_newhook,
197 NULL,
198 NULL,
199 ng_iface_rcvdata,
200 ng_iface_disconnect,
201 ng_iface_cmds
202};
203NETGRAPH_INIT(iface, &typestruct);
204
205/* We keep a bitmap indicating which unit numbers are free.
206 One means the unit number is free, zero means it's taken. */
207static int *ng_iface_units = NULL;
208static int ng_iface_units_len = 0;
209static int ng_units_in_use = 0;
210
211#define UNITS_BITSPERWORD (sizeof(*ng_iface_units) * NBBY)
212
213/************************************************************************
214 HELPER STUFF
215 ************************************************************************/
216
217/*
218 * Get the family descriptor from the family ID
219 */
220static __inline__ iffam_p
221get_iffam_from_af(sa_family_t family)
222{
223 iffam_p iffam;
224 int k;
225
226 for (k = 0; k < NUM_FAMILIES; k++) {
227 iffam = &gFamilies[k];
228 if (iffam->family == family)
229 return (iffam);
230 }
231 return (NULL);
232}
233
234/*
235 * Get the family descriptor from the hook
236 */
237static __inline__ iffam_p
238get_iffam_from_hook(priv_p priv, hook_p hook)
239{
240 int k;
241
242 for (k = 0; k < NUM_FAMILIES; k++)
243 if (priv->hooks[k] == hook)
244 return (&gFamilies[k]);
245 return (NULL);
246}
247
248/*
249 * Get the hook from the iffam descriptor
250 */
251
252static __inline__ hook_p *
253get_hook_from_iffam(priv_p priv, iffam_p iffam)
254{
255 return (&priv->hooks[iffam - gFamilies]);
256}
257
258/*
259 * Get the iffam descriptor from the name
260 */
261static __inline__ iffam_p
262get_iffam_from_name(const char *name)
263{
264 iffam_p iffam;
265 int k;
266
267 for (k = 0; k < NUM_FAMILIES; k++) {
268 iffam = &gFamilies[k];
269 if (!strcmp(iffam->hookname, name))
270 return (iffam);
271 }
272 return (NULL);
273}
274
275/*
276 * Find the first free unit number for a new interface.
277 * Increase the size of the unit bitmap as necessary.
278 */
279static __inline__ int
280ng_iface_get_unit(int *unit)
281{
282 int index, bit;
283
284 for (index = 0; index < ng_iface_units_len
285 && ng_iface_units[index] == 0; index++);
286 if (index == ng_iface_units_len) { /* extend array */
287 int i, *newarray, newlen;
288
289 newlen = (2 * ng_iface_units_len) + 4;
290 MALLOC(newarray, int *, newlen * sizeof(*ng_iface_units),
291 M_NETGRAPH_IFACE, M_NOWAIT);
292 if (newarray == NULL)
293 return (ENOMEM);
294 bcopy(ng_iface_units, newarray,
295 ng_iface_units_len * sizeof(*ng_iface_units));
296 for (i = ng_iface_units_len; i < newlen; i++)
297 newarray[i] = ~0;
298 if (ng_iface_units != NULL)
299 FREE(ng_iface_units, M_NETGRAPH_IFACE);
300 ng_iface_units = newarray;
301 ng_iface_units_len = newlen;
302 }
303 bit = ffs(ng_iface_units[index]) - 1;
304 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
305 ("%s: word=%d bit=%d", __func__, ng_iface_units[index], bit));
306 ng_iface_units[index] &= ~(1 << bit);
307 *unit = (index * UNITS_BITSPERWORD) + bit;
308 ng_units_in_use++;
309 return (0);
310}
311
312/*
313 * Free a no longer needed unit number.
314 */
315static __inline__ void
316ng_iface_free_unit(int unit)
317{
318 int index, bit;
319
320 index = unit / UNITS_BITSPERWORD;
321 bit = unit % UNITS_BITSPERWORD;
322 KASSERT(index < ng_iface_units_len,
323 ("%s: unit=%d len=%d", __func__, unit, ng_iface_units_len));
324 KASSERT((ng_iface_units[index] & (1 << bit)) == 0,
325 ("%s: unit=%d is free", __func__, unit));
326 ng_iface_units[index] |= (1 << bit);
327 /*
328 * XXX We could think about reducing the size of ng_iface_units[]
329 * XXX here if the last portion is all ones
330 * XXX At least free it if no more units.
331 * Needed if we are to eventually be able to unload.
332 */
333 ng_units_in_use--;
334 if (ng_units_in_use == 0) { /* XXX make SMP safe */
335 FREE(ng_iface_units, M_NETGRAPH_IFACE);
336 ng_iface_units_len = 0;
337 ng_iface_units = NULL;
338 }
339}
340
341/************************************************************************
342 INTERFACE STUFF
343 ************************************************************************/
344
345/*
346 * Process an ioctl for the virtual interface
347 */
348static int
349ng_iface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
350{
351 struct ifreq *const ifr = (struct ifreq *) data;
352 int s, error = 0;
353
354#ifdef DEBUG
355 ng_iface_print_ioctl(ifp, command, data);
356#endif
357 s = splimp();
358 switch (command) {
359
360 /* These two are mostly handled at a higher layer */
361 case SIOCSIFADDR:
362 ifp->if_flags |= (IFF_UP | IFF_RUNNING);
363 ifp->if_flags &= ~(IFF_OACTIVE);
364 break;
365 case SIOCGIFADDR:
366 break;
367
368 /* Set flags */
369 case SIOCSIFFLAGS:
370 /*
371 * If the interface is marked up and stopped, then start it.
372 * If it is marked down and running, then stop it.
373 */
374 if (ifr->ifr_flags & IFF_UP) {
375 if (!(ifp->if_flags & IFF_RUNNING)) {
376 ifp->if_flags &= ~(IFF_OACTIVE);
377 ifp->if_flags |= IFF_RUNNING;
378 }
379 } else {
380 if (ifp->if_flags & IFF_RUNNING)
381 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
382 }
383 break;
384
385 /* Set the interface MTU */
386 case SIOCSIFMTU:
387 if (ifr->ifr_mtu > NG_IFACE_MTU_MAX
388 || ifr->ifr_mtu < NG_IFACE_MTU_MIN)
389 error = EINVAL;
390 else
391 ifp->if_mtu = ifr->ifr_mtu;
392 break;
393
394 /* Stuff that's not supported */
395 case SIOCADDMULTI:
396 case SIOCDELMULTI:
397 error = 0;
398 break;
399 case SIOCSIFPHYS:
400 error = EOPNOTSUPP;
401 break;
402
403 default:
404 error = EINVAL;
405 break;
406 }
407 (void) splx(s);
408 return (error);
409}
410
411/*
412 * This routine is called to deliver a packet out the interface.
413 * We simply look at the address family and relay the packet to
414 * the corresponding hook, if it exists and is connected.
415 */
416
417static int
418ng_iface_output(struct ifnet *ifp, struct mbuf *m,
419 struct sockaddr *dst, struct rtentry *rt0)
420{
421 const priv_p priv = (priv_p) ifp->if_softc;
422 const iffam_p iffam = get_iffam_from_af(dst->sa_family);
423 meta_p meta = NULL;
424 int len, error = 0;
425
426 /* Check interface flags */
427 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
428 m_freem(m);
429 return (ENETDOWN);
430 }
431
432 /* BPF writes need to be handled specially */
433 if (dst->sa_family == AF_UNSPEC) {
434 if (m->m_len < 4 && (m = m_pullup(m, 4)) == NULL)
435 return (ENOBUFS);
436 dst->sa_family = (sa_family_t)*mtod(m, int32_t *);
437 m->m_data += 4;
438 m->m_len -= 4;
439 m->m_pkthdr.len -= 4;
440 }
441
442 /* Berkeley packet filter */
443 ng_iface_bpftap(ifp, m, dst->sa_family);
444
445 /* Check address family to determine hook (if known) */
446 if (iffam == NULL) {
447 m_freem(m);
448 log(LOG_WARNING, "%s%d: can't handle af%d\n",
449 ifp->if_name, ifp->if_unit, (int)dst->sa_family);
450 return (EAFNOSUPPORT);
451 }
452
453 /* Copy length before the mbuf gets invalidated */
454 len = m->m_pkthdr.len;
455
456 /* Send packet; if hook is not connected, mbuf will get freed. */
457 NG_SEND_DATA(error, *get_hook_from_iffam(priv, iffam), m, meta);
458
459 /* Update stats */
460 if (error == 0) {
461 ifp->if_obytes += len;
462 ifp->if_opackets++;
463 }
464 return (error);
465}
466
467/*
468 * This routine should never be called
469 */
470
471static void
472ng_iface_start(struct ifnet *ifp)
473{
474 if_printf(ifp, "%s called?", __func__);
475}
476
477/*
478 * Flash a packet by the BPF (requires prepending 4 byte AF header)
479 * Note the phoney mbuf; this is OK because BPF treats it read-only.
480 */
481static void
482ng_iface_bpftap(struct ifnet *ifp, struct mbuf *m, sa_family_t family)
483{
484 int32_t family4 = (int32_t)family;
485 struct mbuf m0;
486
487 KASSERT(family != AF_UNSPEC, ("%s: family=AF_UNSPEC", __func__));
488 if (ifp->if_bpf != NULL) {
489 bzero(&m0, sizeof(m0));
490 m0.m_next = m;
491 m0.m_len = sizeof(family4);
492 m0.m_data = (char *)&family4;
493 BPF_MTAP(ifp, &m0);
494 }
495}
496
497#ifdef DEBUG
498/*
499 * Display an ioctl to the virtual interface
500 */
501
502static void
503ng_iface_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
504{
505 char *str;
506
507 switch (command & IOC_DIRMASK) {
508 case IOC_VOID:
509 str = "IO";
510 break;
511 case IOC_OUT:
512 str = "IOR";
513 break;
514 case IOC_IN:
515 str = "IOW";
516 break;
517 case IOC_INOUT:
518 str = "IORW";
519 break;
520 default:
521 str = "IO??";
522 }
523 log(LOG_DEBUG, "%s%d: %s('%c', %d, char[%d])\n",
524 ifp->if_name, ifp->if_unit,
525 str,
526 IOCGROUP(command),
527 command & 0xff,
528 IOCPARM_LEN(command));
529}
530#endif /* DEBUG */
531
532/************************************************************************
533 NETGRAPH NODE STUFF
534 ************************************************************************/
535
536/*
537 * Constructor for a node
538 */
539static int
540ng_iface_constructor(node_p node)
541{
542 char ifname[NG_IFACE_IFACE_NAME_MAX + 1];
543 struct ifnet *ifp;
544 priv_p priv;
545 int error = 0;
546
547 /* Allocate node and interface private structures */
548 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH_IFACE, M_NOWAIT|M_ZERO);
549 if (priv == NULL)
550 return (ENOMEM);
551 MALLOC(ifp, struct ifnet *, sizeof(*ifp), M_NETGRAPH_IFACE, M_NOWAIT|M_ZERO);
552 if (ifp == NULL) {
553 FREE(priv, M_NETGRAPH_IFACE);
554 return (ENOMEM);
555 }
556
557 /* Link them together */
558 ifp->if_softc = priv;
559 priv->ifp = ifp;
560
561 /* Get an interface unit number */
562 if ((error = ng_iface_get_unit(&priv->unit)) != 0) {
563 FREE(ifp, M_NETGRAPH_IFACE);
564 FREE(priv, M_NETGRAPH_IFACE);
565 return (error);
566 }
567
568 /* Link together node and private info */
569 NG_NODE_SET_PRIVATE(node, priv);
570 priv->node = node;
571
572 /* Initialize interface structure */
573 ifp->if_name = NG_IFACE_IFACE_NAME;
574 ifp->if_unit = priv->unit;
575 ifp->if_output = ng_iface_output;
576 ifp->if_start = ng_iface_start;
577 ifp->if_ioctl = ng_iface_ioctl;
578 ifp->if_watchdog = NULL;
579 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
580 ifp->if_mtu = NG_IFACE_MTU_DEFAULT;
581 ifp->if_flags = (IFF_SIMPLEX|IFF_POINTOPOINT|IFF_NOARP|IFF_MULTICAST);
582 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */
583 ifp->if_addrlen = 0; /* XXX */
584 ifp->if_hdrlen = 0; /* XXX */
585 ifp->if_baudrate = 64000; /* XXX */
586 TAILQ_INIT(&ifp->if_addrhead);
587
588 /* Give this node the same name as the interface (if possible) */
589 bzero(ifname, sizeof(ifname));
590 snprintf(ifname, sizeof(ifname), "%s%d", ifp->if_name, ifp->if_unit);
591 if (ng_name_node(node, ifname) != 0)
592 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname);
593
594 /* Attach the interface */
595 if_attach(ifp);
596 bpfattach(ifp, DLT_NULL, sizeof(u_int));
597
598 /* Done */
599 return (0);
600}
601
602/*
603 * Give our ok for a hook to be added
604 */
605static int
606ng_iface_newhook(node_p node, hook_p hook, const char *name)
607{
608 const iffam_p iffam = get_iffam_from_name(name);
609 hook_p *hookptr;
610
611 if (iffam == NULL)
612 return (EPFNOSUPPORT);
613 hookptr = get_hook_from_iffam(NG_NODE_PRIVATE(node), iffam);
614 if (*hookptr != NULL)
615 return (EISCONN);
616 *hookptr = hook;
617 return (0);
618}
619
620/*
621 * Receive a control message
622 */
623static int
624ng_iface_rcvmsg(node_p node, item_p item, hook_p lasthook)
625{
626 const priv_p priv = NG_NODE_PRIVATE(node);
627 struct ifnet *const ifp = priv->ifp;
628 struct ng_mesg *resp = NULL;
629 int error = 0;
630 struct ng_mesg *msg;
631
632 NGI_GET_MSG(item, msg);
633 switch (msg->header.typecookie) {
634 case NGM_IFACE_COOKIE:
635 switch (msg->header.cmd) {
636 case NGM_IFACE_GET_IFNAME:
637 {
638 struct ng_iface_ifname *arg;
639
640 NG_MKRESPONSE(resp, msg, sizeof(*arg), M_NOWAIT);
641 if (resp == NULL) {
642 error = ENOMEM;
643 break;
644 }
645 arg = (struct ng_iface_ifname *)resp->data;
646 snprintf(arg->ngif_name, sizeof(arg->ngif_name),
647 "%s%d", ifp->if_name, ifp->if_unit);
648 break;
649 }
650
651 case NGM_IFACE_POINT2POINT:
652 case NGM_IFACE_BROADCAST:
653 {
654
655 /* Deny request if interface is UP */
656 if ((ifp->if_flags & IFF_UP) != 0)
657 return (EBUSY);
658
659 /* Change flags */
660 switch (msg->header.cmd) {
661 case NGM_IFACE_POINT2POINT:
662 ifp->if_flags |= IFF_POINTOPOINT;
663 ifp->if_flags &= ~IFF_BROADCAST;
664 break;
665 case NGM_IFACE_BROADCAST:
666 ifp->if_flags &= ~IFF_POINTOPOINT;
667 ifp->if_flags |= IFF_BROADCAST;
668 break;
669 }
670 break;
671 }
672
673 default:
674 error = EINVAL;
675 break;
676 }
677 break;
678 case NGM_CISCO_COOKIE:
679 switch (msg->header.cmd) {
680 case NGM_CISCO_GET_IPADDR: /* we understand this too */
681 {
682 struct ifaddr *ifa;
683
684 /* Return the first configured IP address */
685 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
686 struct ng_cisco_ipaddr *ips;
687
688 if (ifa->ifa_addr->sa_family != AF_INET)
689 continue;
690 NG_MKRESPONSE(resp, msg, sizeof(ips), M_NOWAIT);
691 if (resp == NULL) {
692 error = ENOMEM;
693 break;
694 }
695 ips = (struct ng_cisco_ipaddr *)resp->data;
696 ips->ipaddr = ((struct sockaddr_in *)
697 ifa->ifa_addr)->sin_addr;
698 ips->netmask = ((struct sockaddr_in *)
699 ifa->ifa_netmask)->sin_addr;
700 break;
701 }
702
703 /* No IP addresses on this interface? */
704 if (ifa == NULL)
705 error = EADDRNOTAVAIL;
706 break;
707 }
708 default:
709 error = EINVAL;
710 break;
711 }
712 break;
713 default:
714 error = EINVAL;
715 break;
716 }
717 NG_RESPOND_MSG(error, node, item, resp);
718 NG_FREE_MSG(msg);
719 return (error);
720}
721
722/*
723 * Recive data from a hook. Pass the packet to the correct input routine.
724 */
725static int
726ng_iface_rcvdata(hook_p hook, item_p item)
727{
728 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
729 const iffam_p iffam = get_iffam_from_hook(priv, hook);
730 struct ifnet *const ifp = priv->ifp;
731 struct mbuf *m;
| 70
71#include <netinet/in.h>
72
73#include <netgraph/ng_message.h>
74#include <netgraph/netgraph.h>
75#include <netgraph/ng_parse.h>
76#include <netgraph/ng_iface.h>
77#include <netgraph/ng_cisco.h>
78
79#ifdef NG_SEPARATE_MALLOC
80MALLOC_DEFINE(M_NETGRAPH_IFACE, "netgraph_iface", "netgraph iface node ");
81#else
82#define M_NETGRAPH_IFACE M_NETGRAPH
83#endif
84
85/* This struct describes one address family */
86struct iffam {
87 sa_family_t family; /* Address family */
88 const char *hookname; /* Name for hook */
89};
90typedef const struct iffam *iffam_p;
91
92/* List of address families supported by our interface */
93const static struct iffam gFamilies[] = {
94 { AF_INET, NG_IFACE_HOOK_INET },
95 { AF_INET6, NG_IFACE_HOOK_INET6 },
96 { AF_APPLETALK, NG_IFACE_HOOK_ATALK },
97 { AF_IPX, NG_IFACE_HOOK_IPX },
98 { AF_ATM, NG_IFACE_HOOK_ATM },
99 { AF_NATM, NG_IFACE_HOOK_NATM },
100 { AF_NS, NG_IFACE_HOOK_NS },
101};
102#define NUM_FAMILIES (sizeof(gFamilies) / sizeof(*gFamilies))
103
104/* Node private data */
105struct ng_iface_private {
106 struct ifnet *ifp; /* Our interface */
107 int unit; /* Interface unit number */
108 node_p node; /* Our netgraph node */
109 hook_p hooks[NUM_FAMILIES]; /* Hook for each address family */
110};
111typedef struct ng_iface_private *priv_p;
112
113/* Interface methods */
114static void ng_iface_start(struct ifnet *ifp);
115static int ng_iface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
116static int ng_iface_output(struct ifnet *ifp, struct mbuf *m0,
117 struct sockaddr *dst, struct rtentry *rt0);
118static void ng_iface_bpftap(struct ifnet *ifp,
119 struct mbuf *m, sa_family_t family);
120#ifdef DEBUG
121static void ng_iface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
122#endif
123
124/* Netgraph methods */
125static ng_constructor_t ng_iface_constructor;
126static ng_rcvmsg_t ng_iface_rcvmsg;
127static ng_shutdown_t ng_iface_shutdown;
128static ng_newhook_t ng_iface_newhook;
129static ng_rcvdata_t ng_iface_rcvdata;
130static ng_disconnect_t ng_iface_disconnect;
131
132/* Helper stuff */
133static iffam_p get_iffam_from_af(sa_family_t family);
134static iffam_p get_iffam_from_hook(priv_p priv, hook_p hook);
135static iffam_p get_iffam_from_name(const char *name);
136static hook_p *get_hook_from_iffam(priv_p priv, iffam_p iffam);
137
138/* Parse type for struct ng_iface_ifname */
139static const struct ng_parse_fixedstring_info ng_iface_ifname_info = {
140 NG_IFACE_IFACE_NAME_MAX + 1
141};
142static const struct ng_parse_type ng_iface_ifname_type = {
143 &ng_parse_fixedstring_type,
144 &ng_iface_ifname_info
145};
146
147/* Parse type for struct ng_cisco_ipaddr */
148static const struct ng_parse_struct_field ng_cisco_ipaddr_type_fields[]
149 = NG_CISCO_IPADDR_TYPE_INFO;
150static const struct ng_parse_type ng_cisco_ipaddr_type = {
151 &ng_parse_struct_type,
152 &ng_cisco_ipaddr_type_fields
153};
154
155/* List of commands and how to convert arguments to/from ASCII */
156static const struct ng_cmdlist ng_iface_cmds[] = {
157 {
158 NGM_IFACE_COOKIE,
159 NGM_IFACE_GET_IFNAME,
160 "getifname",
161 NULL,
162 &ng_iface_ifname_type
163 },
164 {
165 NGM_IFACE_COOKIE,
166 NGM_IFACE_POINT2POINT,
167 "point2point",
168 NULL,
169 NULL
170 },
171 {
172 NGM_IFACE_COOKIE,
173 NGM_IFACE_BROADCAST,
174 "broadcast",
175 NULL,
176 NULL
177 },
178 {
179 NGM_CISCO_COOKIE,
180 NGM_CISCO_GET_IPADDR,
181 "getipaddr",
182 NULL,
183 &ng_cisco_ipaddr_type
184 },
185 { 0 }
186};
187
188/* Node type descriptor */
189static struct ng_type typestruct = {
190 NG_ABI_VERSION,
191 NG_IFACE_NODE_TYPE,
192 NULL,
193 ng_iface_constructor,
194 ng_iface_rcvmsg,
195 ng_iface_shutdown,
196 ng_iface_newhook,
197 NULL,
198 NULL,
199 ng_iface_rcvdata,
200 ng_iface_disconnect,
201 ng_iface_cmds
202};
203NETGRAPH_INIT(iface, &typestruct);
204
205/* We keep a bitmap indicating which unit numbers are free.
206 One means the unit number is free, zero means it's taken. */
207static int *ng_iface_units = NULL;
208static int ng_iface_units_len = 0;
209static int ng_units_in_use = 0;
210
211#define UNITS_BITSPERWORD (sizeof(*ng_iface_units) * NBBY)
212
213/************************************************************************
214 HELPER STUFF
215 ************************************************************************/
216
217/*
218 * Get the family descriptor from the family ID
219 */
220static __inline__ iffam_p
221get_iffam_from_af(sa_family_t family)
222{
223 iffam_p iffam;
224 int k;
225
226 for (k = 0; k < NUM_FAMILIES; k++) {
227 iffam = &gFamilies[k];
228 if (iffam->family == family)
229 return (iffam);
230 }
231 return (NULL);
232}
233
234/*
235 * Get the family descriptor from the hook
236 */
237static __inline__ iffam_p
238get_iffam_from_hook(priv_p priv, hook_p hook)
239{
240 int k;
241
242 for (k = 0; k < NUM_FAMILIES; k++)
243 if (priv->hooks[k] == hook)
244 return (&gFamilies[k]);
245 return (NULL);
246}
247
248/*
249 * Get the hook from the iffam descriptor
250 */
251
252static __inline__ hook_p *
253get_hook_from_iffam(priv_p priv, iffam_p iffam)
254{
255 return (&priv->hooks[iffam - gFamilies]);
256}
257
258/*
259 * Get the iffam descriptor from the name
260 */
261static __inline__ iffam_p
262get_iffam_from_name(const char *name)
263{
264 iffam_p iffam;
265 int k;
266
267 for (k = 0; k < NUM_FAMILIES; k++) {
268 iffam = &gFamilies[k];
269 if (!strcmp(iffam->hookname, name))
270 return (iffam);
271 }
272 return (NULL);
273}
274
275/*
276 * Find the first free unit number for a new interface.
277 * Increase the size of the unit bitmap as necessary.
278 */
279static __inline__ int
280ng_iface_get_unit(int *unit)
281{
282 int index, bit;
283
284 for (index = 0; index < ng_iface_units_len
285 && ng_iface_units[index] == 0; index++);
286 if (index == ng_iface_units_len) { /* extend array */
287 int i, *newarray, newlen;
288
289 newlen = (2 * ng_iface_units_len) + 4;
290 MALLOC(newarray, int *, newlen * sizeof(*ng_iface_units),
291 M_NETGRAPH_IFACE, M_NOWAIT);
292 if (newarray == NULL)
293 return (ENOMEM);
294 bcopy(ng_iface_units, newarray,
295 ng_iface_units_len * sizeof(*ng_iface_units));
296 for (i = ng_iface_units_len; i < newlen; i++)
297 newarray[i] = ~0;
298 if (ng_iface_units != NULL)
299 FREE(ng_iface_units, M_NETGRAPH_IFACE);
300 ng_iface_units = newarray;
301 ng_iface_units_len = newlen;
302 }
303 bit = ffs(ng_iface_units[index]) - 1;
304 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
305 ("%s: word=%d bit=%d", __func__, ng_iface_units[index], bit));
306 ng_iface_units[index] &= ~(1 << bit);
307 *unit = (index * UNITS_BITSPERWORD) + bit;
308 ng_units_in_use++;
309 return (0);
310}
311
312/*
313 * Free a no longer needed unit number.
314 */
315static __inline__ void
316ng_iface_free_unit(int unit)
317{
318 int index, bit;
319
320 index = unit / UNITS_BITSPERWORD;
321 bit = unit % UNITS_BITSPERWORD;
322 KASSERT(index < ng_iface_units_len,
323 ("%s: unit=%d len=%d", __func__, unit, ng_iface_units_len));
324 KASSERT((ng_iface_units[index] & (1 << bit)) == 0,
325 ("%s: unit=%d is free", __func__, unit));
326 ng_iface_units[index] |= (1 << bit);
327 /*
328 * XXX We could think about reducing the size of ng_iface_units[]
329 * XXX here if the last portion is all ones
330 * XXX At least free it if no more units.
331 * Needed if we are to eventually be able to unload.
332 */
333 ng_units_in_use--;
334 if (ng_units_in_use == 0) { /* XXX make SMP safe */
335 FREE(ng_iface_units, M_NETGRAPH_IFACE);
336 ng_iface_units_len = 0;
337 ng_iface_units = NULL;
338 }
339}
340
341/************************************************************************
342 INTERFACE STUFF
343 ************************************************************************/
344
345/*
346 * Process an ioctl for the virtual interface
347 */
348static int
349ng_iface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
350{
351 struct ifreq *const ifr = (struct ifreq *) data;
352 int s, error = 0;
353
354#ifdef DEBUG
355 ng_iface_print_ioctl(ifp, command, data);
356#endif
357 s = splimp();
358 switch (command) {
359
360 /* These two are mostly handled at a higher layer */
361 case SIOCSIFADDR:
362 ifp->if_flags |= (IFF_UP | IFF_RUNNING);
363 ifp->if_flags &= ~(IFF_OACTIVE);
364 break;
365 case SIOCGIFADDR:
366 break;
367
368 /* Set flags */
369 case SIOCSIFFLAGS:
370 /*
371 * If the interface is marked up and stopped, then start it.
372 * If it is marked down and running, then stop it.
373 */
374 if (ifr->ifr_flags & IFF_UP) {
375 if (!(ifp->if_flags & IFF_RUNNING)) {
376 ifp->if_flags &= ~(IFF_OACTIVE);
377 ifp->if_flags |= IFF_RUNNING;
378 }
379 } else {
380 if (ifp->if_flags & IFF_RUNNING)
381 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
382 }
383 break;
384
385 /* Set the interface MTU */
386 case SIOCSIFMTU:
387 if (ifr->ifr_mtu > NG_IFACE_MTU_MAX
388 || ifr->ifr_mtu < NG_IFACE_MTU_MIN)
389 error = EINVAL;
390 else
391 ifp->if_mtu = ifr->ifr_mtu;
392 break;
393
394 /* Stuff that's not supported */
395 case SIOCADDMULTI:
396 case SIOCDELMULTI:
397 error = 0;
398 break;
399 case SIOCSIFPHYS:
400 error = EOPNOTSUPP;
401 break;
402
403 default:
404 error = EINVAL;
405 break;
406 }
407 (void) splx(s);
408 return (error);
409}
410
411/*
412 * This routine is called to deliver a packet out the interface.
413 * We simply look at the address family and relay the packet to
414 * the corresponding hook, if it exists and is connected.
415 */
416
417static int
418ng_iface_output(struct ifnet *ifp, struct mbuf *m,
419 struct sockaddr *dst, struct rtentry *rt0)
420{
421 const priv_p priv = (priv_p) ifp->if_softc;
422 const iffam_p iffam = get_iffam_from_af(dst->sa_family);
423 meta_p meta = NULL;
424 int len, error = 0;
425
426 /* Check interface flags */
427 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
428 m_freem(m);
429 return (ENETDOWN);
430 }
431
432 /* BPF writes need to be handled specially */
433 if (dst->sa_family == AF_UNSPEC) {
434 if (m->m_len < 4 && (m = m_pullup(m, 4)) == NULL)
435 return (ENOBUFS);
436 dst->sa_family = (sa_family_t)*mtod(m, int32_t *);
437 m->m_data += 4;
438 m->m_len -= 4;
439 m->m_pkthdr.len -= 4;
440 }
441
442 /* Berkeley packet filter */
443 ng_iface_bpftap(ifp, m, dst->sa_family);
444
445 /* Check address family to determine hook (if known) */
446 if (iffam == NULL) {
447 m_freem(m);
448 log(LOG_WARNING, "%s%d: can't handle af%d\n",
449 ifp->if_name, ifp->if_unit, (int)dst->sa_family);
450 return (EAFNOSUPPORT);
451 }
452
453 /* Copy length before the mbuf gets invalidated */
454 len = m->m_pkthdr.len;
455
456 /* Send packet; if hook is not connected, mbuf will get freed. */
457 NG_SEND_DATA(error, *get_hook_from_iffam(priv, iffam), m, meta);
458
459 /* Update stats */
460 if (error == 0) {
461 ifp->if_obytes += len;
462 ifp->if_opackets++;
463 }
464 return (error);
465}
466
467/*
468 * This routine should never be called
469 */
470
471static void
472ng_iface_start(struct ifnet *ifp)
473{
474 if_printf(ifp, "%s called?", __func__);
475}
476
477/*
478 * Flash a packet by the BPF (requires prepending 4 byte AF header)
479 * Note the phoney mbuf; this is OK because BPF treats it read-only.
480 */
481static void
482ng_iface_bpftap(struct ifnet *ifp, struct mbuf *m, sa_family_t family)
483{
484 int32_t family4 = (int32_t)family;
485 struct mbuf m0;
486
487 KASSERT(family != AF_UNSPEC, ("%s: family=AF_UNSPEC", __func__));
488 if (ifp->if_bpf != NULL) {
489 bzero(&m0, sizeof(m0));
490 m0.m_next = m;
491 m0.m_len = sizeof(family4);
492 m0.m_data = (char *)&family4;
493 BPF_MTAP(ifp, &m0);
494 }
495}
496
497#ifdef DEBUG
498/*
499 * Display an ioctl to the virtual interface
500 */
501
502static void
503ng_iface_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
504{
505 char *str;
506
507 switch (command & IOC_DIRMASK) {
508 case IOC_VOID:
509 str = "IO";
510 break;
511 case IOC_OUT:
512 str = "IOR";
513 break;
514 case IOC_IN:
515 str = "IOW";
516 break;
517 case IOC_INOUT:
518 str = "IORW";
519 break;
520 default:
521 str = "IO??";
522 }
523 log(LOG_DEBUG, "%s%d: %s('%c', %d, char[%d])\n",
524 ifp->if_name, ifp->if_unit,
525 str,
526 IOCGROUP(command),
527 command & 0xff,
528 IOCPARM_LEN(command));
529}
530#endif /* DEBUG */
531
532/************************************************************************
533 NETGRAPH NODE STUFF
534 ************************************************************************/
535
536/*
537 * Constructor for a node
538 */
539static int
540ng_iface_constructor(node_p node)
541{
542 char ifname[NG_IFACE_IFACE_NAME_MAX + 1];
543 struct ifnet *ifp;
544 priv_p priv;
545 int error = 0;
546
547 /* Allocate node and interface private structures */
548 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH_IFACE, M_NOWAIT|M_ZERO);
549 if (priv == NULL)
550 return (ENOMEM);
551 MALLOC(ifp, struct ifnet *, sizeof(*ifp), M_NETGRAPH_IFACE, M_NOWAIT|M_ZERO);
552 if (ifp == NULL) {
553 FREE(priv, M_NETGRAPH_IFACE);
554 return (ENOMEM);
555 }
556
557 /* Link them together */
558 ifp->if_softc = priv;
559 priv->ifp = ifp;
560
561 /* Get an interface unit number */
562 if ((error = ng_iface_get_unit(&priv->unit)) != 0) {
563 FREE(ifp, M_NETGRAPH_IFACE);
564 FREE(priv, M_NETGRAPH_IFACE);
565 return (error);
566 }
567
568 /* Link together node and private info */
569 NG_NODE_SET_PRIVATE(node, priv);
570 priv->node = node;
571
572 /* Initialize interface structure */
573 ifp->if_name = NG_IFACE_IFACE_NAME;
574 ifp->if_unit = priv->unit;
575 ifp->if_output = ng_iface_output;
576 ifp->if_start = ng_iface_start;
577 ifp->if_ioctl = ng_iface_ioctl;
578 ifp->if_watchdog = NULL;
579 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
580 ifp->if_mtu = NG_IFACE_MTU_DEFAULT;
581 ifp->if_flags = (IFF_SIMPLEX|IFF_POINTOPOINT|IFF_NOARP|IFF_MULTICAST);
582 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */
583 ifp->if_addrlen = 0; /* XXX */
584 ifp->if_hdrlen = 0; /* XXX */
585 ifp->if_baudrate = 64000; /* XXX */
586 TAILQ_INIT(&ifp->if_addrhead);
587
588 /* Give this node the same name as the interface (if possible) */
589 bzero(ifname, sizeof(ifname));
590 snprintf(ifname, sizeof(ifname), "%s%d", ifp->if_name, ifp->if_unit);
591 if (ng_name_node(node, ifname) != 0)
592 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname);
593
594 /* Attach the interface */
595 if_attach(ifp);
596 bpfattach(ifp, DLT_NULL, sizeof(u_int));
597
598 /* Done */
599 return (0);
600}
601
602/*
603 * Give our ok for a hook to be added
604 */
605static int
606ng_iface_newhook(node_p node, hook_p hook, const char *name)
607{
608 const iffam_p iffam = get_iffam_from_name(name);
609 hook_p *hookptr;
610
611 if (iffam == NULL)
612 return (EPFNOSUPPORT);
613 hookptr = get_hook_from_iffam(NG_NODE_PRIVATE(node), iffam);
614 if (*hookptr != NULL)
615 return (EISCONN);
616 *hookptr = hook;
617 return (0);
618}
619
620/*
621 * Receive a control message
622 */
623static int
624ng_iface_rcvmsg(node_p node, item_p item, hook_p lasthook)
625{
626 const priv_p priv = NG_NODE_PRIVATE(node);
627 struct ifnet *const ifp = priv->ifp;
628 struct ng_mesg *resp = NULL;
629 int error = 0;
630 struct ng_mesg *msg;
631
632 NGI_GET_MSG(item, msg);
633 switch (msg->header.typecookie) {
634 case NGM_IFACE_COOKIE:
635 switch (msg->header.cmd) {
636 case NGM_IFACE_GET_IFNAME:
637 {
638 struct ng_iface_ifname *arg;
639
640 NG_MKRESPONSE(resp, msg, sizeof(*arg), M_NOWAIT);
641 if (resp == NULL) {
642 error = ENOMEM;
643 break;
644 }
645 arg = (struct ng_iface_ifname *)resp->data;
646 snprintf(arg->ngif_name, sizeof(arg->ngif_name),
647 "%s%d", ifp->if_name, ifp->if_unit);
648 break;
649 }
650
651 case NGM_IFACE_POINT2POINT:
652 case NGM_IFACE_BROADCAST:
653 {
654
655 /* Deny request if interface is UP */
656 if ((ifp->if_flags & IFF_UP) != 0)
657 return (EBUSY);
658
659 /* Change flags */
660 switch (msg->header.cmd) {
661 case NGM_IFACE_POINT2POINT:
662 ifp->if_flags |= IFF_POINTOPOINT;
663 ifp->if_flags &= ~IFF_BROADCAST;
664 break;
665 case NGM_IFACE_BROADCAST:
666 ifp->if_flags &= ~IFF_POINTOPOINT;
667 ifp->if_flags |= IFF_BROADCAST;
668 break;
669 }
670 break;
671 }
672
673 default:
674 error = EINVAL;
675 break;
676 }
677 break;
678 case NGM_CISCO_COOKIE:
679 switch (msg->header.cmd) {
680 case NGM_CISCO_GET_IPADDR: /* we understand this too */
681 {
682 struct ifaddr *ifa;
683
684 /* Return the first configured IP address */
685 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
686 struct ng_cisco_ipaddr *ips;
687
688 if (ifa->ifa_addr->sa_family != AF_INET)
689 continue;
690 NG_MKRESPONSE(resp, msg, sizeof(ips), M_NOWAIT);
691 if (resp == NULL) {
692 error = ENOMEM;
693 break;
694 }
695 ips = (struct ng_cisco_ipaddr *)resp->data;
696 ips->ipaddr = ((struct sockaddr_in *)
697 ifa->ifa_addr)->sin_addr;
698 ips->netmask = ((struct sockaddr_in *)
699 ifa->ifa_netmask)->sin_addr;
700 break;
701 }
702
703 /* No IP addresses on this interface? */
704 if (ifa == NULL)
705 error = EADDRNOTAVAIL;
706 break;
707 }
708 default:
709 error = EINVAL;
710 break;
711 }
712 break;
713 default:
714 error = EINVAL;
715 break;
716 }
717 NG_RESPOND_MSG(error, node, item, resp);
718 NG_FREE_MSG(msg);
719 return (error);
720}
721
722/*
723 * Recive data from a hook. Pass the packet to the correct input routine.
724 */
725static int
726ng_iface_rcvdata(hook_p hook, item_p item)
727{
728 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
729 const iffam_p iffam = get_iffam_from_hook(priv, hook);
730 struct ifnet *const ifp = priv->ifp;
731 struct mbuf *m;
|