1/*-
2 *
3 * Copyright (c) 1999-2001, Vitaly V Belekhov
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions, and the following
11 * disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
| 1/*-
2 *
3 * Copyright (c) 1999-2001, Vitaly V Belekhov
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions, and the following
11 * disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
|
29 */
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/errno.h>
34#include <sys/kernel.h>
35#include <sys/malloc.h>
36#include <sys/mbuf.h>
37#include <sys/errno.h>
38#include <sys/proc.h>
39#include <sys/sockio.h>
40#include <sys/socket.h>
41#include <sys/syslog.h>
42
43#include <net/if.h>
44#include <net/if_media.h>
45#include <net/if_types.h>
46#include <net/netisr.h>
47#include <net/route.h>
48#include <net/vnet.h>
49
50#include <netgraph/ng_message.h>
51#include <netgraph/netgraph.h>
52#include <netgraph/ng_parse.h>
53#include <netgraph/ng_eiface.h>
54
55#include <net/bpf.h>
56#include <net/ethernet.h>
57#include <net/if_arp.h>
58
59static const struct ng_cmdlist ng_eiface_cmdlist[] = {
60 {
61 NGM_EIFACE_COOKIE,
62 NGM_EIFACE_GET_IFNAME,
63 "getifname",
64 NULL,
65 &ng_parse_string_type
66 },
67 {
68 NGM_EIFACE_COOKIE,
69 NGM_EIFACE_SET,
70 "set",
71 &ng_parse_enaddr_type,
72 NULL
73 },
74 { 0 }
75};
76
77/* Node private data */
78struct ng_eiface_private {
79 struct ifnet *ifp; /* per-interface network data */
80 struct ifmedia media; /* (fake) media information */
81 int link_status; /* fake */
82 int unit; /* Interface unit number */
83 node_p node; /* Our netgraph node */
84 hook_p ether; /* Hook for ethernet stream */
85};
86typedef struct ng_eiface_private *priv_p;
87
88/* Interface methods */
89static void ng_eiface_init(void *xsc);
90static void ng_eiface_start(struct ifnet *ifp);
91static int ng_eiface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
92#ifdef DEBUG
93static void ng_eiface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
94#endif
95
96/* Netgraph methods */
97static int ng_eiface_mod_event(module_t, int, void *);
98static ng_constructor_t ng_eiface_constructor;
99static ng_rcvmsg_t ng_eiface_rcvmsg;
100static ng_shutdown_t ng_eiface_rmnode;
101static ng_newhook_t ng_eiface_newhook;
102static ng_rcvdata_t ng_eiface_rcvdata;
103static ng_disconnect_t ng_eiface_disconnect;
104
105/* Node type descriptor */
106static struct ng_type typestruct = {
107 .version = NG_ABI_VERSION,
108 .name = NG_EIFACE_NODE_TYPE,
109 .mod_event = ng_eiface_mod_event,
110 .constructor = ng_eiface_constructor,
111 .rcvmsg = ng_eiface_rcvmsg,
112 .shutdown = ng_eiface_rmnode,
113 .newhook = ng_eiface_newhook,
114 .rcvdata = ng_eiface_rcvdata,
115 .disconnect = ng_eiface_disconnect,
116 .cmdlist = ng_eiface_cmdlist
117};
118NETGRAPH_INIT(eiface, &typestruct);
119
120static VNET_DEFINE(struct unrhdr *, ng_eiface_unit);
121#define V_ng_eiface_unit VNET(ng_eiface_unit)
122
123/************************************************************************
124 INTERFACE STUFF
125 ************************************************************************/
126
127/*
128 * Process an ioctl for the virtual interface
129 */
130static int
131ng_eiface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
132{
133 const priv_p priv = (priv_p)ifp->if_softc;
134 struct ifreq *const ifr = (struct ifreq *)data;
| 29 */
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/errno.h>
34#include <sys/kernel.h>
35#include <sys/malloc.h>
36#include <sys/mbuf.h>
37#include <sys/errno.h>
38#include <sys/proc.h>
39#include <sys/sockio.h>
40#include <sys/socket.h>
41#include <sys/syslog.h>
42
43#include <net/if.h>
44#include <net/if_media.h>
45#include <net/if_types.h>
46#include <net/netisr.h>
47#include <net/route.h>
48#include <net/vnet.h>
49
50#include <netgraph/ng_message.h>
51#include <netgraph/netgraph.h>
52#include <netgraph/ng_parse.h>
53#include <netgraph/ng_eiface.h>
54
55#include <net/bpf.h>
56#include <net/ethernet.h>
57#include <net/if_arp.h>
58
59static const struct ng_cmdlist ng_eiface_cmdlist[] = {
60 {
61 NGM_EIFACE_COOKIE,
62 NGM_EIFACE_GET_IFNAME,
63 "getifname",
64 NULL,
65 &ng_parse_string_type
66 },
67 {
68 NGM_EIFACE_COOKIE,
69 NGM_EIFACE_SET,
70 "set",
71 &ng_parse_enaddr_type,
72 NULL
73 },
74 { 0 }
75};
76
77/* Node private data */
78struct ng_eiface_private {
79 struct ifnet *ifp; /* per-interface network data */
80 struct ifmedia media; /* (fake) media information */
81 int link_status; /* fake */
82 int unit; /* Interface unit number */
83 node_p node; /* Our netgraph node */
84 hook_p ether; /* Hook for ethernet stream */
85};
86typedef struct ng_eiface_private *priv_p;
87
88/* Interface methods */
89static void ng_eiface_init(void *xsc);
90static void ng_eiface_start(struct ifnet *ifp);
91static int ng_eiface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
92#ifdef DEBUG
93static void ng_eiface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
94#endif
95
96/* Netgraph methods */
97static int ng_eiface_mod_event(module_t, int, void *);
98static ng_constructor_t ng_eiface_constructor;
99static ng_rcvmsg_t ng_eiface_rcvmsg;
100static ng_shutdown_t ng_eiface_rmnode;
101static ng_newhook_t ng_eiface_newhook;
102static ng_rcvdata_t ng_eiface_rcvdata;
103static ng_disconnect_t ng_eiface_disconnect;
104
105/* Node type descriptor */
106static struct ng_type typestruct = {
107 .version = NG_ABI_VERSION,
108 .name = NG_EIFACE_NODE_TYPE,
109 .mod_event = ng_eiface_mod_event,
110 .constructor = ng_eiface_constructor,
111 .rcvmsg = ng_eiface_rcvmsg,
112 .shutdown = ng_eiface_rmnode,
113 .newhook = ng_eiface_newhook,
114 .rcvdata = ng_eiface_rcvdata,
115 .disconnect = ng_eiface_disconnect,
116 .cmdlist = ng_eiface_cmdlist
117};
118NETGRAPH_INIT(eiface, &typestruct);
119
120static VNET_DEFINE(struct unrhdr *, ng_eiface_unit);
121#define V_ng_eiface_unit VNET(ng_eiface_unit)
122
123/************************************************************************
124 INTERFACE STUFF
125 ************************************************************************/
126
127/*
128 * Process an ioctl for the virtual interface
129 */
130static int
131ng_eiface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
132{
133 const priv_p priv = (priv_p)ifp->if_softc;
134 struct ifreq *const ifr = (struct ifreq *)data;
|
213}
214
215/*
216 * We simply relay the packet to the "ether" hook, if it is connected.
217 * We have been through the netgraph locking and are guaranteed to
218 * be the only code running in this node at this time.
219 */
220static void
221ng_eiface_start2(node_p node, hook_p hook, void *arg1, int arg2)
222{
223 struct ifnet *ifp = arg1;
224 const priv_p priv = (priv_p)ifp->if_softc;
225 int error = 0;
226 struct mbuf *m;
227
228 /* Check interface flags */
229
230 if (!((ifp->if_flags & IFF_UP) &&
231 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
232 return;
233
234 for (;;) {
235 /*
236 * Grab a packet to transmit.
237 */
238 IF_DEQUEUE(&ifp->if_snd, m);
239
240 /* If there's nothing to send, break. */
241 if (m == NULL)
242 break;
243
244 /*
245 * Berkeley packet filter.
246 * Pass packet to bpf if there is a listener.
247 * XXX is this safe? locking?
248 */
249 BPF_MTAP(ifp, m);
250
251 if (ifp->if_flags & IFF_MONITOR) {
252 ifp->if_ipackets++;
253 m_freem(m);
254 continue;
255 }
256
257 /*
258 * Send packet; if hook is not connected, mbuf will get
259 * freed.
260 */
261 NG_OUTBOUND_THREAD_REF();
262 NG_SEND_DATA_ONLY(error, priv->ether, m);
263 NG_OUTBOUND_THREAD_UNREF();
264
265 /* Update stats */
266 if (error == 0)
267 ifp->if_opackets++;
268 else
269 ifp->if_oerrors++;
270 }
271
272 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
273
274 return;
275}
276
277/*
278 * This routine is called to deliver a packet out the interface.
279 * We simply queue the netgraph version to be called when netgraph locking
280 * allows it to happen.
281 * Until we know what the rest of the networking code is doing for
282 * locking, we don't know how we will interact with it.
283 * Take comfort from the fact that the ifnet struct is part of our
284 * private info and can't go away while we are queued.
285 * [Though we don't know it is still there now....]
286 * it is possible we don't gain anything from this because
287 * we would like to get the mbuf and queue it as data
288 * somehow, but we can't and if we did would we solve anything?
289 */
290static void
291ng_eiface_start(struct ifnet *ifp)
292{
293 const priv_p priv = (priv_p)ifp->if_softc;
294
295 /* Don't do anything if output is active */
296 if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
297 return;
298
299 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
300
301 if (ng_send_fn(priv->node, NULL, &ng_eiface_start2, ifp, 0) != 0)
302 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
303}
304
305#ifdef DEBUG
306/*
307 * Display an ioctl to the virtual interface
308 */
309
310static void
311ng_eiface_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
312{
313 char *str;
314
315 switch (command & IOC_DIRMASK) {
316 case IOC_VOID:
317 str = "IO";
318 break;
319 case IOC_OUT:
320 str = "IOR";
321 break;
322 case IOC_IN:
323 str = "IOW";
324 break;
325 case IOC_INOUT:
326 str = "IORW";
327 break;
328 default:
329 str = "IO??";
330 }
331 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
332 ifp->if_xname,
333 str,
334 IOCGROUP(command),
335 command & 0xff,
336 IOCPARM_LEN(command));
337}
338#endif /* DEBUG */
339
340/*
341 * ifmedia stuff
342 */
343static int
344ng_eiface_mediachange(struct ifnet *ifp)
345{
346 const priv_p priv = (priv_p)ifp->if_softc;
347 struct ifmedia *ifm = &priv->media;
348
349 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
350 return (EINVAL);
351 if (IFM_SUBTYPE(ifm->ifm_media) == IFM_AUTO)
352 ifp->if_baudrate = ifmedia_baudrate(IFM_ETHER | IFM_1000_T);
353 else
354 ifp->if_baudrate = ifmedia_baudrate(ifm->ifm_media);
355
356 return (0);
357}
358
359static void
360ng_eiface_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
361{
362 const priv_p priv = (priv_p)ifp->if_softc;
363 struct ifmedia *ifm = &priv->media;
364
365 if (ifm->ifm_cur->ifm_media == (IFM_ETHER | IFM_AUTO) &&
366 (priv->link_status & IFM_ACTIVE))
367 ifmr->ifm_active = IFM_ETHER | IFM_1000_T | IFM_FDX;
368 else
369 ifmr->ifm_active = ifm->ifm_cur->ifm_media;
370 ifmr->ifm_status = priv->link_status;
371
372 return;
373}
374
375/************************************************************************
376 NETGRAPH NODE STUFF
377 ************************************************************************/
378
379/*
380 * Constructor for a node
381 */
382static int
383ng_eiface_constructor(node_p node)
384{
385 struct ifnet *ifp;
386 priv_p priv;
387 u_char eaddr[6] = {0,0,0,0,0,0};
388
389 /* Allocate node and interface private structures */
390 priv = malloc(sizeof(*priv), M_NETGRAPH, M_WAITOK | M_ZERO);
391
392 ifp = priv->ifp = if_alloc(IFT_ETHER);
393 if (ifp == NULL) {
394 free(priv, M_NETGRAPH);
395 return (ENOSPC);
396 }
397
398 /* Link them together */
399 ifp->if_softc = priv;
400
401 /* Get an interface unit number */
402 priv->unit = alloc_unr(V_ng_eiface_unit);
403
404 /* Link together node and private info */
405 NG_NODE_SET_PRIVATE(node, priv);
406 priv->node = node;
407
408 /* Initialize interface structure */
409 if_initname(ifp, NG_EIFACE_EIFACE_NAME, priv->unit);
410 ifp->if_init = ng_eiface_init;
411 ifp->if_output = ether_output;
412 ifp->if_start = ng_eiface_start;
413 ifp->if_ioctl = ng_eiface_ioctl;
414 ifp->if_snd.ifq_maxlen = ifqmaxlen;
415 ifp->if_flags = (IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST);
416 ifp->if_capabilities = IFCAP_VLAN_MTU | IFCAP_JUMBO_MTU;
417 ifp->if_capenable = IFCAP_VLAN_MTU | IFCAP_JUMBO_MTU;
418 ifmedia_init(&priv->media, 0, ng_eiface_mediachange,
419 ng_eiface_mediastatus);
420 ifmedia_add(&priv->media, IFM_ETHER | IFM_10_T, 0, NULL);
421 ifmedia_add(&priv->media, IFM_ETHER | IFM_10_T | IFM_FDX, 0, NULL);
422 ifmedia_add(&priv->media, IFM_ETHER | IFM_100_TX, 0, NULL);
423 ifmedia_add(&priv->media, IFM_ETHER | IFM_100_TX | IFM_FDX, 0, NULL);
424 ifmedia_add(&priv->media, IFM_ETHER | IFM_1000_T, 0, NULL);
425 ifmedia_add(&priv->media, IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL);
426 ifmedia_add(&priv->media, IFM_ETHER | IFM_10G_T | IFM_FDX, 0, NULL);
427 ifmedia_add(&priv->media, IFM_ETHER | IFM_AUTO, 0, NULL);
428 ifmedia_set(&priv->media, IFM_ETHER | IFM_AUTO);
429 priv->link_status = IFM_AVALID;
430
431 /* Give this node the same name as the interface (if possible) */
432 if (ng_name_node(node, ifp->if_xname) != 0)
433 log(LOG_WARNING, "%s: can't acquire netgraph name\n",
434 ifp->if_xname);
435
436 /* Attach the interface */
437 ether_ifattach(ifp, eaddr);
438 ifp->if_baudrate = ifmedia_baudrate(IFM_ETHER | IFM_1000_T);
439
440 /* Done */
441 return (0);
442}
443
444/*
445 * Give our ok for a hook to be added
446 */
447static int
448ng_eiface_newhook(node_p node, hook_p hook, const char *name)
449{
450 priv_p priv = NG_NODE_PRIVATE(node);
451 struct ifnet *ifp = priv->ifp;
452
453 if (strcmp(name, NG_EIFACE_HOOK_ETHER))
454 return (EPFNOSUPPORT);
455 if (priv->ether != NULL)
456 return (EISCONN);
457 priv->ether = hook;
458 NG_HOOK_SET_PRIVATE(hook, &priv->ether);
459 NG_HOOK_SET_TO_INBOUND(hook);
460
461 priv->link_status |= IFM_ACTIVE;
462 CURVNET_SET_QUIET(ifp->if_vnet);
463 if_link_state_change(ifp, LINK_STATE_UP);
464 CURVNET_RESTORE();
465
466 return (0);
467}
468
469/*
470 * Receive a control message
471 */
472static int
473ng_eiface_rcvmsg(node_p node, item_p item, hook_p lasthook)
474{
475 const priv_p priv = NG_NODE_PRIVATE(node);
476 struct ifnet *const ifp = priv->ifp;
477 struct ng_mesg *resp = NULL;
478 int error = 0;
479 struct ng_mesg *msg;
480
481 NGI_GET_MSG(item, msg);
482 switch (msg->header.typecookie) {
483 case NGM_EIFACE_COOKIE:
484 switch (msg->header.cmd) {
485
486 case NGM_EIFACE_SET:
487 {
488 if (msg->header.arglen != ETHER_ADDR_LEN) {
489 error = EINVAL;
490 break;
491 }
492 error = if_setlladdr(priv->ifp,
493 (u_char *)msg->data, ETHER_ADDR_LEN);
494 EVENTHANDLER_INVOKE(iflladdr_event, priv->ifp);
495 break;
496 }
497
498 case NGM_EIFACE_GET_IFNAME:
499 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
500 if (resp == NULL) {
501 error = ENOMEM;
502 break;
503 }
504 strlcpy(resp->data, ifp->if_xname, IFNAMSIZ);
505 break;
506
507 case NGM_EIFACE_GET_IFADDRS:
508 {
509 struct ifaddr *ifa;
510 caddr_t ptr;
511 int buflen;
512
513 /* Determine size of response and allocate it */
514 buflen = 0;
515 if_addr_rlock(ifp);
516 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
517 buflen += SA_SIZE(ifa->ifa_addr);
518 NG_MKRESPONSE(resp, msg, buflen, M_NOWAIT);
519 if (resp == NULL) {
520 if_addr_runlock(ifp);
521 error = ENOMEM;
522 break;
523 }
524
525 /* Add addresses */
526 ptr = resp->data;
527 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
528 const int len = SA_SIZE(ifa->ifa_addr);
529
530 if (buflen < len) {
531 log(LOG_ERR, "%s: len changed?\n",
532 ifp->if_xname);
533 break;
534 }
535 bcopy(ifa->ifa_addr, ptr, len);
536 ptr += len;
537 buflen -= len;
538 }
539 if_addr_runlock(ifp);
540 break;
541 }
542
543 default:
544 error = EINVAL;
545 break;
546 } /* end of inner switch() */
547 break;
548 case NGM_FLOW_COOKIE:
549 CURVNET_SET_QUIET(ifp->if_vnet);
550 switch (msg->header.cmd) {
551 case NGM_LINK_IS_UP:
552 priv->link_status |= IFM_ACTIVE;
553 if_link_state_change(ifp, LINK_STATE_UP);
554 break;
555 case NGM_LINK_IS_DOWN:
556 priv->link_status &= ~IFM_ACTIVE;
557 if_link_state_change(ifp, LINK_STATE_DOWN);
558 break;
559 default:
560 break;
561 }
562 CURVNET_RESTORE();
563 break;
564 default:
565 error = EINVAL;
566 break;
567 }
568 NG_RESPOND_MSG(error, node, item, resp);
569 NG_FREE_MSG(msg);
570 return (error);
571}
572
573/*
574 * Receive data from a hook. Pass the packet to the ether_input routine.
575 */
576static int
577ng_eiface_rcvdata(hook_p hook, item_p item)
578{
579 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
580 struct ifnet *const ifp = priv->ifp;
581 struct mbuf *m;
582
583 NGI_GET_M(item, m);
584 NG_FREE_ITEM(item);
585
586 if (!((ifp->if_flags & IFF_UP) &&
587 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
588 NG_FREE_M(m);
589 return (ENETDOWN);
590 }
591
592 if (m->m_len < ETHER_HDR_LEN) {
593 m = m_pullup(m, ETHER_HDR_LEN);
594 if (m == NULL)
595 return (EINVAL);
596 }
597
598 /* Note receiving interface */
599 m->m_pkthdr.rcvif = ifp;
600
601 /* Update interface stats */
602 ifp->if_ipackets++;
603
604 (*ifp->if_input)(ifp, m);
605
606 /* Done */
607 return (0);
608}
609
610/*
611 * Shutdown processing.
612 */
613static int
614ng_eiface_rmnode(node_p node)
615{
616 const priv_p priv = NG_NODE_PRIVATE(node);
617 struct ifnet *const ifp = priv->ifp;
618
619 /*
620 * the ifnet may be in a different vnet than the netgraph node,
621 * hence we have to change the current vnet context here.
622 */
623 CURVNET_SET_QUIET(ifp->if_vnet);
624 ifmedia_removeall(&priv->media);
625 ether_ifdetach(ifp);
626 if_free(ifp);
627 CURVNET_RESTORE();
628 free_unr(V_ng_eiface_unit, priv->unit);
629 free(priv, M_NETGRAPH);
630 NG_NODE_SET_PRIVATE(node, NULL);
631 NG_NODE_UNREF(node);
632 return (0);
633}
634
635/*
636 * Hook disconnection
637 */
638static int
639ng_eiface_disconnect(hook_p hook)
640{
641 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
642
643 priv->ether = NULL;
644 priv->link_status &= ~IFM_ACTIVE;
645 CURVNET_SET_QUIET(priv->ifp->if_vnet);
646 if_link_state_change(priv->ifp, LINK_STATE_DOWN);
647 CURVNET_RESTORE();
648 return (0);
649}
650
651/*
652 * Handle loading and unloading for this node type.
653 */
654static int
655ng_eiface_mod_event(module_t mod, int event, void *data)
656{
657 int error = 0;
658
659 switch (event) {
660 case MOD_LOAD:
661 case MOD_UNLOAD:
662 break;
663 default:
664 error = EOPNOTSUPP;
665 break;
666 }
667 return (error);
668}
669
670static void
671vnet_ng_eiface_init(const void *unused)
672{
673
674 V_ng_eiface_unit = new_unrhdr(0, 0xffff, NULL);
675}
676VNET_SYSINIT(vnet_ng_eiface_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
677 vnet_ng_eiface_init, NULL);
678
679static void
680vnet_ng_eiface_uninit(const void *unused)
681{
682
683 delete_unrhdr(V_ng_eiface_unit);
684}
685VNET_SYSUNINIT(vnet_ng_eiface_uninit, SI_SUB_PSEUDO, SI_ORDER_ANY,
686 vnet_ng_eiface_uninit, NULL);
| 206}
207
208/*
209 * We simply relay the packet to the "ether" hook, if it is connected.
210 * We have been through the netgraph locking and are guaranteed to
211 * be the only code running in this node at this time.
212 */
213static void
214ng_eiface_start2(node_p node, hook_p hook, void *arg1, int arg2)
215{
216 struct ifnet *ifp = arg1;
217 const priv_p priv = (priv_p)ifp->if_softc;
218 int error = 0;
219 struct mbuf *m;
220
221 /* Check interface flags */
222
223 if (!((ifp->if_flags & IFF_UP) &&
224 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
225 return;
226
227 for (;;) {
228 /*
229 * Grab a packet to transmit.
230 */
231 IF_DEQUEUE(&ifp->if_snd, m);
232
233 /* If there's nothing to send, break. */
234 if (m == NULL)
235 break;
236
237 /*
238 * Berkeley packet filter.
239 * Pass packet to bpf if there is a listener.
240 * XXX is this safe? locking?
241 */
242 BPF_MTAP(ifp, m);
243
244 if (ifp->if_flags & IFF_MONITOR) {
245 ifp->if_ipackets++;
246 m_freem(m);
247 continue;
248 }
249
250 /*
251 * Send packet; if hook is not connected, mbuf will get
252 * freed.
253 */
254 NG_OUTBOUND_THREAD_REF();
255 NG_SEND_DATA_ONLY(error, priv->ether, m);
256 NG_OUTBOUND_THREAD_UNREF();
257
258 /* Update stats */
259 if (error == 0)
260 ifp->if_opackets++;
261 else
262 ifp->if_oerrors++;
263 }
264
265 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
266
267 return;
268}
269
270/*
271 * This routine is called to deliver a packet out the interface.
272 * We simply queue the netgraph version to be called when netgraph locking
273 * allows it to happen.
274 * Until we know what the rest of the networking code is doing for
275 * locking, we don't know how we will interact with it.
276 * Take comfort from the fact that the ifnet struct is part of our
277 * private info and can't go away while we are queued.
278 * [Though we don't know it is still there now....]
279 * it is possible we don't gain anything from this because
280 * we would like to get the mbuf and queue it as data
281 * somehow, but we can't and if we did would we solve anything?
282 */
283static void
284ng_eiface_start(struct ifnet *ifp)
285{
286 const priv_p priv = (priv_p)ifp->if_softc;
287
288 /* Don't do anything if output is active */
289 if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
290 return;
291
292 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
293
294 if (ng_send_fn(priv->node, NULL, &ng_eiface_start2, ifp, 0) != 0)
295 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
296}
297
298#ifdef DEBUG
299/*
300 * Display an ioctl to the virtual interface
301 */
302
303static void
304ng_eiface_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
305{
306 char *str;
307
308 switch (command & IOC_DIRMASK) {
309 case IOC_VOID:
310 str = "IO";
311 break;
312 case IOC_OUT:
313 str = "IOR";
314 break;
315 case IOC_IN:
316 str = "IOW";
317 break;
318 case IOC_INOUT:
319 str = "IORW";
320 break;
321 default:
322 str = "IO??";
323 }
324 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
325 ifp->if_xname,
326 str,
327 IOCGROUP(command),
328 command & 0xff,
329 IOCPARM_LEN(command));
330}
331#endif /* DEBUG */
332
333/*
334 * ifmedia stuff
335 */
336static int
337ng_eiface_mediachange(struct ifnet *ifp)
338{
339 const priv_p priv = (priv_p)ifp->if_softc;
340 struct ifmedia *ifm = &priv->media;
341
342 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
343 return (EINVAL);
344 if (IFM_SUBTYPE(ifm->ifm_media) == IFM_AUTO)
345 ifp->if_baudrate = ifmedia_baudrate(IFM_ETHER | IFM_1000_T);
346 else
347 ifp->if_baudrate = ifmedia_baudrate(ifm->ifm_media);
348
349 return (0);
350}
351
352static void
353ng_eiface_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
354{
355 const priv_p priv = (priv_p)ifp->if_softc;
356 struct ifmedia *ifm = &priv->media;
357
358 if (ifm->ifm_cur->ifm_media == (IFM_ETHER | IFM_AUTO) &&
359 (priv->link_status & IFM_ACTIVE))
360 ifmr->ifm_active = IFM_ETHER | IFM_1000_T | IFM_FDX;
361 else
362 ifmr->ifm_active = ifm->ifm_cur->ifm_media;
363 ifmr->ifm_status = priv->link_status;
364
365 return;
366}
367
368/************************************************************************
369 NETGRAPH NODE STUFF
370 ************************************************************************/
371
372/*
373 * Constructor for a node
374 */
375static int
376ng_eiface_constructor(node_p node)
377{
378 struct ifnet *ifp;
379 priv_p priv;
380 u_char eaddr[6] = {0,0,0,0,0,0};
381
382 /* Allocate node and interface private structures */
383 priv = malloc(sizeof(*priv), M_NETGRAPH, M_WAITOK | M_ZERO);
384
385 ifp = priv->ifp = if_alloc(IFT_ETHER);
386 if (ifp == NULL) {
387 free(priv, M_NETGRAPH);
388 return (ENOSPC);
389 }
390
391 /* Link them together */
392 ifp->if_softc = priv;
393
394 /* Get an interface unit number */
395 priv->unit = alloc_unr(V_ng_eiface_unit);
396
397 /* Link together node and private info */
398 NG_NODE_SET_PRIVATE(node, priv);
399 priv->node = node;
400
401 /* Initialize interface structure */
402 if_initname(ifp, NG_EIFACE_EIFACE_NAME, priv->unit);
403 ifp->if_init = ng_eiface_init;
404 ifp->if_output = ether_output;
405 ifp->if_start = ng_eiface_start;
406 ifp->if_ioctl = ng_eiface_ioctl;
407 ifp->if_snd.ifq_maxlen = ifqmaxlen;
408 ifp->if_flags = (IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST);
409 ifp->if_capabilities = IFCAP_VLAN_MTU | IFCAP_JUMBO_MTU;
410 ifp->if_capenable = IFCAP_VLAN_MTU | IFCAP_JUMBO_MTU;
411 ifmedia_init(&priv->media, 0, ng_eiface_mediachange,
412 ng_eiface_mediastatus);
413 ifmedia_add(&priv->media, IFM_ETHER | IFM_10_T, 0, NULL);
414 ifmedia_add(&priv->media, IFM_ETHER | IFM_10_T | IFM_FDX, 0, NULL);
415 ifmedia_add(&priv->media, IFM_ETHER | IFM_100_TX, 0, NULL);
416 ifmedia_add(&priv->media, IFM_ETHER | IFM_100_TX | IFM_FDX, 0, NULL);
417 ifmedia_add(&priv->media, IFM_ETHER | IFM_1000_T, 0, NULL);
418 ifmedia_add(&priv->media, IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL);
419 ifmedia_add(&priv->media, IFM_ETHER | IFM_10G_T | IFM_FDX, 0, NULL);
420 ifmedia_add(&priv->media, IFM_ETHER | IFM_AUTO, 0, NULL);
421 ifmedia_set(&priv->media, IFM_ETHER | IFM_AUTO);
422 priv->link_status = IFM_AVALID;
423
424 /* Give this node the same name as the interface (if possible) */
425 if (ng_name_node(node, ifp->if_xname) != 0)
426 log(LOG_WARNING, "%s: can't acquire netgraph name\n",
427 ifp->if_xname);
428
429 /* Attach the interface */
430 ether_ifattach(ifp, eaddr);
431 ifp->if_baudrate = ifmedia_baudrate(IFM_ETHER | IFM_1000_T);
432
433 /* Done */
434 return (0);
435}
436
437/*
438 * Give our ok for a hook to be added
439 */
440static int
441ng_eiface_newhook(node_p node, hook_p hook, const char *name)
442{
443 priv_p priv = NG_NODE_PRIVATE(node);
444 struct ifnet *ifp = priv->ifp;
445
446 if (strcmp(name, NG_EIFACE_HOOK_ETHER))
447 return (EPFNOSUPPORT);
448 if (priv->ether != NULL)
449 return (EISCONN);
450 priv->ether = hook;
451 NG_HOOK_SET_PRIVATE(hook, &priv->ether);
452 NG_HOOK_SET_TO_INBOUND(hook);
453
454 priv->link_status |= IFM_ACTIVE;
455 CURVNET_SET_QUIET(ifp->if_vnet);
456 if_link_state_change(ifp, LINK_STATE_UP);
457 CURVNET_RESTORE();
458
459 return (0);
460}
461
462/*
463 * Receive a control message
464 */
465static int
466ng_eiface_rcvmsg(node_p node, item_p item, hook_p lasthook)
467{
468 const priv_p priv = NG_NODE_PRIVATE(node);
469 struct ifnet *const ifp = priv->ifp;
470 struct ng_mesg *resp = NULL;
471 int error = 0;
472 struct ng_mesg *msg;
473
474 NGI_GET_MSG(item, msg);
475 switch (msg->header.typecookie) {
476 case NGM_EIFACE_COOKIE:
477 switch (msg->header.cmd) {
478
479 case NGM_EIFACE_SET:
480 {
481 if (msg->header.arglen != ETHER_ADDR_LEN) {
482 error = EINVAL;
483 break;
484 }
485 error = if_setlladdr(priv->ifp,
486 (u_char *)msg->data, ETHER_ADDR_LEN);
487 EVENTHANDLER_INVOKE(iflladdr_event, priv->ifp);
488 break;
489 }
490
491 case NGM_EIFACE_GET_IFNAME:
492 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
493 if (resp == NULL) {
494 error = ENOMEM;
495 break;
496 }
497 strlcpy(resp->data, ifp->if_xname, IFNAMSIZ);
498 break;
499
500 case NGM_EIFACE_GET_IFADDRS:
501 {
502 struct ifaddr *ifa;
503 caddr_t ptr;
504 int buflen;
505
506 /* Determine size of response and allocate it */
507 buflen = 0;
508 if_addr_rlock(ifp);
509 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
510 buflen += SA_SIZE(ifa->ifa_addr);
511 NG_MKRESPONSE(resp, msg, buflen, M_NOWAIT);
512 if (resp == NULL) {
513 if_addr_runlock(ifp);
514 error = ENOMEM;
515 break;
516 }
517
518 /* Add addresses */
519 ptr = resp->data;
520 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
521 const int len = SA_SIZE(ifa->ifa_addr);
522
523 if (buflen < len) {
524 log(LOG_ERR, "%s: len changed?\n",
525 ifp->if_xname);
526 break;
527 }
528 bcopy(ifa->ifa_addr, ptr, len);
529 ptr += len;
530 buflen -= len;
531 }
532 if_addr_runlock(ifp);
533 break;
534 }
535
536 default:
537 error = EINVAL;
538 break;
539 } /* end of inner switch() */
540 break;
541 case NGM_FLOW_COOKIE:
542 CURVNET_SET_QUIET(ifp->if_vnet);
543 switch (msg->header.cmd) {
544 case NGM_LINK_IS_UP:
545 priv->link_status |= IFM_ACTIVE;
546 if_link_state_change(ifp, LINK_STATE_UP);
547 break;
548 case NGM_LINK_IS_DOWN:
549 priv->link_status &= ~IFM_ACTIVE;
550 if_link_state_change(ifp, LINK_STATE_DOWN);
551 break;
552 default:
553 break;
554 }
555 CURVNET_RESTORE();
556 break;
557 default:
558 error = EINVAL;
559 break;
560 }
561 NG_RESPOND_MSG(error, node, item, resp);
562 NG_FREE_MSG(msg);
563 return (error);
564}
565
566/*
567 * Receive data from a hook. Pass the packet to the ether_input routine.
568 */
569static int
570ng_eiface_rcvdata(hook_p hook, item_p item)
571{
572 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
573 struct ifnet *const ifp = priv->ifp;
574 struct mbuf *m;
575
576 NGI_GET_M(item, m);
577 NG_FREE_ITEM(item);
578
579 if (!((ifp->if_flags & IFF_UP) &&
580 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
581 NG_FREE_M(m);
582 return (ENETDOWN);
583 }
584
585 if (m->m_len < ETHER_HDR_LEN) {
586 m = m_pullup(m, ETHER_HDR_LEN);
587 if (m == NULL)
588 return (EINVAL);
589 }
590
591 /* Note receiving interface */
592 m->m_pkthdr.rcvif = ifp;
593
594 /* Update interface stats */
595 ifp->if_ipackets++;
596
597 (*ifp->if_input)(ifp, m);
598
599 /* Done */
600 return (0);
601}
602
603/*
604 * Shutdown processing.
605 */
606static int
607ng_eiface_rmnode(node_p node)
608{
609 const priv_p priv = NG_NODE_PRIVATE(node);
610 struct ifnet *const ifp = priv->ifp;
611
612 /*
613 * the ifnet may be in a different vnet than the netgraph node,
614 * hence we have to change the current vnet context here.
615 */
616 CURVNET_SET_QUIET(ifp->if_vnet);
617 ifmedia_removeall(&priv->media);
618 ether_ifdetach(ifp);
619 if_free(ifp);
620 CURVNET_RESTORE();
621 free_unr(V_ng_eiface_unit, priv->unit);
622 free(priv, M_NETGRAPH);
623 NG_NODE_SET_PRIVATE(node, NULL);
624 NG_NODE_UNREF(node);
625 return (0);
626}
627
628/*
629 * Hook disconnection
630 */
631static int
632ng_eiface_disconnect(hook_p hook)
633{
634 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
635
636 priv->ether = NULL;
637 priv->link_status &= ~IFM_ACTIVE;
638 CURVNET_SET_QUIET(priv->ifp->if_vnet);
639 if_link_state_change(priv->ifp, LINK_STATE_DOWN);
640 CURVNET_RESTORE();
641 return (0);
642}
643
644/*
645 * Handle loading and unloading for this node type.
646 */
647static int
648ng_eiface_mod_event(module_t mod, int event, void *data)
649{
650 int error = 0;
651
652 switch (event) {
653 case MOD_LOAD:
654 case MOD_UNLOAD:
655 break;
656 default:
657 error = EOPNOTSUPP;
658 break;
659 }
660 return (error);
661}
662
663static void
664vnet_ng_eiface_init(const void *unused)
665{
666
667 V_ng_eiface_unit = new_unrhdr(0, 0xffff, NULL);
668}
669VNET_SYSINIT(vnet_ng_eiface_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
670 vnet_ng_eiface_init, NULL);
671
672static void
673vnet_ng_eiface_uninit(const void *unused)
674{
675
676 delete_unrhdr(V_ng_eiface_unit);
677}
678VNET_SYSUNINIT(vnet_ng_eiface_uninit, SI_SUB_PSEUDO, SI_ORDER_ANY,
679 vnet_ng_eiface_uninit, NULL);
|