1 | /* |
2 | * Copyright (c) 2000-2022 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* |
29 | * Copyright (c) 1982, 1989, 1993 |
30 | * The Regents of the University of California. All rights reserved. |
31 | * |
32 | * Redistribution and use in source and binary forms, with or without |
33 | * modification, are permitted provided that the following conditions |
34 | * are met: |
35 | * 1. Redistributions of source code must retain the above copyright |
36 | * notice, this list of conditions and the following disclaimer. |
37 | * 2. Redistributions in binary form must reproduce the above copyright |
38 | * notice, this list of conditions and the following disclaimer in the |
39 | * documentation and/or other materials provided with the distribution. |
40 | * 3. All advertising materials mentioning features or use of this software |
41 | * must display the following acknowledgement: |
42 | * This product includes software developed by the University of |
43 | * California, Berkeley and its contributors. |
44 | * 4. Neither the name of the University nor the names of its contributors |
45 | * may be used to endorse or promote products derived from this software |
46 | * without specific prior written permission. |
47 | * |
48 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
51 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
54 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
55 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
56 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
57 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
58 | * SUCH DAMAGE. |
59 | * |
60 | */ |
61 | /* |
62 | * NOTICE: This file was modified by SPARTA, Inc. in 2006 to introduce |
63 | * support for mandatory and extensible security protections. This notice |
64 | * is included in support of clause 2.2 (b) of the Apple Public License, |
65 | * Version 2.0. |
66 | */ |
67 | |
68 | |
69 | #include <sys/param.h> |
70 | #include <sys/systm.h> |
71 | #include <sys/kernel.h> |
72 | #include <sys/malloc.h> |
73 | #include <sys/mbuf.h> |
74 | #include <sys/socket.h> |
75 | #include <sys/sockio.h> |
76 | #include <sys/sysctl.h> |
77 | |
78 | #include <net/dlil.h> |
79 | #include <net/if.h> |
80 | #include <net/route.h> |
81 | #include <net/if_llc.h> |
82 | #include <net/if_dl.h> |
83 | #include <net/if_types.h> |
84 | #include <net/kpi_protocol.h> |
85 | #include <netinet/in.h> |
86 | #include <netinet/in_var.h> |
87 | #include <netinet/if_ether.h> |
88 | #include <netinet/in_systm.h> |
89 | #include <netinet/ip.h> |
90 | #include <netinet/in_arp.h> |
91 | |
92 | #include <sys/socketvar.h> |
93 | |
94 | #include <net/dlil.h> |
95 | |
96 | /* #include "vlan.h" */ |
97 | #if NVLAN > 0 |
98 | #include <net/if_vlan_var.h> |
99 | #endif /* NVLAN > 0 */ |
100 | #include <net/ether_if_module.h> |
101 | #if CONFIG_MACF |
102 | #include <security/mac_framework.h> |
103 | #endif |
104 | |
105 | #include <net/sockaddr_utils.h> |
106 | |
107 | /* Local function declarations */ |
108 | extern void *kdp_get_interface(void); |
109 | extern void kdp_set_ip_and_mac_addresses(struct in_addr *ipaddr, |
110 | struct ether_addr *macaddr); |
111 | |
112 | #define _ip_copy(dst, src) \ |
113 | bcopy(src, dst, sizeof (struct in_addr)) |
114 | |
115 | static void |
116 | ether_inet_arp_input(struct ifnet *ifp, struct mbuf *m) |
117 | { |
118 | struct ether_arp *ea; |
119 | struct sockaddr_dl sender_hw; |
120 | struct sockaddr_in sender_ip; |
121 | struct sockaddr_in target_ip; |
122 | |
123 | if (mbuf_len(mbuf: m) < sizeof(*ea) && mbuf_pullup(mbuf: &m, len: sizeof(*ea)) != 0) { |
124 | return; |
125 | } |
126 | |
127 | ea = mbuf_data(mbuf: m); |
128 | |
129 | /* Verify this is an ethernet/ip arp and address lengths are correct */ |
130 | if (ntohs(ea->arp_hrd) != ARPHRD_ETHER || |
131 | ntohs(ea->arp_pro) != ETHERTYPE_IP || |
132 | ea->arp_pln != sizeof(struct in_addr) || |
133 | ea->arp_hln != ETHER_ADDR_LEN) { |
134 | mbuf_freem(mbuf: m); |
135 | return; |
136 | } |
137 | |
138 | /* Verify the sender is not broadcast */ |
139 | if (bcmp(s1: ea->arp_sha, s2: etherbroadcastaddr, ETHER_ADDR_LEN) == 0) { |
140 | mbuf_freem(mbuf: m); |
141 | return; |
142 | } |
143 | |
144 | SOCKADDR_ZERO(&sender_ip, sizeof(sender_ip)); |
145 | sender_ip.sin_len = sizeof(sender_ip); |
146 | sender_ip.sin_family = AF_INET; |
147 | _ip_copy(&sender_ip.sin_addr, ea->arp_spa); |
148 | target_ip = sender_ip; |
149 | _ip_copy(&target_ip.sin_addr, ea->arp_tpa); |
150 | |
151 | SOCKADDR_ZERO(&sender_hw, sizeof(sender_hw)); |
152 | sender_hw.sdl_len = sizeof(sender_hw); |
153 | sender_hw.sdl_family = AF_LINK; |
154 | sender_hw.sdl_type = IFT_ETHER; |
155 | sender_hw.sdl_alen = ETHER_ADDR_LEN; |
156 | bcopy(src: ea->arp_sha, LLADDR(&sender_hw), ETHER_ADDR_LEN); |
157 | |
158 | /* update L2 reachability record, if present */ |
159 | arp_llreach_set_reachable(ifp, LLADDR(&sender_hw), ETHER_ADDR_LEN); |
160 | |
161 | arp_ip_handle_input(ifp, ntohs(ea->arp_op), sender_hw: &sender_hw, sender_ip: &sender_ip, |
162 | target_ip: &target_ip); |
163 | mbuf_freem(mbuf: m); |
164 | } |
165 | |
166 | /* |
167 | * Process a received Ethernet packet; |
168 | * the packet is in the mbuf chain m without |
169 | * the ether header, which is provided separately. |
170 | */ |
171 | static errno_t |
172 | ether_inet_input(ifnet_t ifp, protocol_family_t protocol_family, |
173 | mbuf_t m_list) |
174 | { |
175 | #pragma unused(ifp, protocol_family) |
176 | mbuf_t m; |
177 | mbuf_t *tailptr = &m_list; |
178 | mbuf_t nextpkt; |
179 | bool is_cache_valid = false; |
180 | u_char cached_shost[ETHER_ADDR_LEN] = {}; |
181 | |
182 | /* Strip ARP and non-IP packets out of the list */ |
183 | for (m = m_list; m; m = nextpkt) { |
184 | struct ether_header *eh = mbuf_pkthdr_header(mbuf: m); |
185 | struct ifnet *mifp; |
186 | |
187 | /* |
188 | * Trust the ifp in the mbuf, rather than ifproto's |
189 | * since the packet could have been injected via |
190 | * a dlil_input_packet_list() using an ifp that is |
191 | * different than the one where the packet really |
192 | * came from. |
193 | */ |
194 | mifp = mbuf_pkthdr_rcvif(mbuf: m); |
195 | |
196 | nextpkt = m->m_nextpkt; |
197 | |
198 | if (__probable(eh->ether_type == htons(ETHERTYPE_IP))) { |
199 | /* |
200 | * Update L2 reachability record, if present |
201 | * (and if not a broadcast sender). |
202 | * Note that M_BCAST will be already set by ether_demux() |
203 | */ |
204 | if (__improbable((m->m_flags & M_BCAST) == 0 && (is_cache_valid == false || |
205 | memcmp(eh->ether_shost, cached_shost, ETHER_ADDR_LEN) != 0))) { |
206 | memcpy(dst: eh->ether_shost, src: cached_shost, ETHER_ADDR_LEN); |
207 | is_cache_valid = true; |
208 | |
209 | arp_llreach_set_reachable(mifp, eh->ether_shost, |
210 | ETHER_ADDR_LEN); |
211 | } |
212 | /* put this packet in the list */ |
213 | *tailptr = m; |
214 | tailptr = &m->m_nextpkt; |
215 | } else { |
216 | /* Pass ARP packets to arp input */ |
217 | m->m_nextpkt = NULL; |
218 | if (eh->ether_type == htons(ETHERTYPE_ARP)) { |
219 | ether_inet_arp_input(ifp: mifp, m); |
220 | } else { |
221 | mbuf_freem(mbuf: m); |
222 | } |
223 | } |
224 | } |
225 | |
226 | *tailptr = NULL; |
227 | |
228 | /* Pass IP list to ip input */ |
229 | if (m_list != NULL && proto_input(PF_INET, packet: m_list) != 0) { |
230 | mbuf_freem_list(mbuf: m_list); |
231 | } |
232 | |
233 | return EJUSTRETURN; |
234 | } |
235 | |
236 | static errno_t |
237 | ether_inet_pre_output(ifnet_t ifp, protocol_family_t protocol_family, |
238 | mbuf_t *m0, const struct sockaddr *dst_netaddr, |
239 | void *route, char *type, char *edst) |
240 | { |
241 | #pragma unused(protocol_family) |
242 | struct mbuf *m = *m0; |
243 | const struct ether_header *eh; |
244 | errno_t result = 0; |
245 | |
246 | if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING)) { |
247 | return ENETDOWN; |
248 | } |
249 | |
250 | /* |
251 | * Tell ether_frameout it's ok to loop packet unless negated below. |
252 | */ |
253 | m->m_flags |= M_LOOP; |
254 | |
255 | switch (dst_netaddr->sa_family) { |
256 | case AF_INET: { |
257 | struct sockaddr_dl ll_dest = {}; |
258 | |
259 | result = arp_lookup_ip(interface: ifp, |
260 | SIN(dst_netaddr), |
261 | ll_dest: &ll_dest, ll_dest_len: sizeof(ll_dest), hint: (route_t)route, packet: *m0); |
262 | if (result == 0) { |
263 | u_int16_t ethertype_ip = htons(ETHERTYPE_IP); |
264 | |
265 | bcopy(LLADDR(&ll_dest), dst: edst, ETHER_ADDR_LEN); |
266 | bcopy(src: ðertype_ip, dst: type, n: sizeof(ethertype_ip)); |
267 | } |
268 | break; |
269 | } |
270 | |
271 | case pseudo_AF_HDRCMPLT: |
272 | case AF_UNSPEC: |
273 | m->m_flags &= ~M_LOOP; |
274 | eh = (const struct ether_header *)(uintptr_t)(size_t) |
275 | dst_netaddr->sa_data; |
276 | (void) memcpy(dst: edst, src: eh->ether_dhost, n: 6); |
277 | bcopy(src: &eh->ether_type, dst: type, n: sizeof(u_short)); |
278 | break; |
279 | |
280 | default: |
281 | printf("%s: can't handle af%d\n" , if_name(ifp), |
282 | dst_netaddr->sa_family); |
283 | |
284 | result = EAFNOSUPPORT; |
285 | break; |
286 | } |
287 | |
288 | return result; |
289 | } |
290 | |
291 | static errno_t |
292 | ether_inet_resolve_multi(ifnet_t ifp, const struct sockaddr *proto_addr, |
293 | struct sockaddr_dl *out_ll, size_t ll_len) |
294 | { |
295 | static const size_t minsize = |
296 | offsetof(struct sockaddr_dl, sdl_data[0]) + ETHER_ADDR_LEN; |
297 | const struct sockaddr_in *sin = SIN(proto_addr); |
298 | |
299 | if (proto_addr->sa_family != AF_INET) { |
300 | return EAFNOSUPPORT; |
301 | } |
302 | |
303 | if (proto_addr->sa_len < sizeof(struct sockaddr_in)) { |
304 | return EINVAL; |
305 | } |
306 | |
307 | if (ll_len < minsize) { |
308 | return EMSGSIZE; |
309 | } |
310 | |
311 | SOCKADDR_ZERO(out_ll, minsize); |
312 | out_ll->sdl_len = minsize; |
313 | out_ll->sdl_family = AF_LINK; |
314 | out_ll->sdl_index = ifp->if_index; |
315 | out_ll->sdl_type = IFT_ETHER; |
316 | out_ll->sdl_nlen = 0; |
317 | out_ll->sdl_alen = ETHER_ADDR_LEN; |
318 | out_ll->sdl_slen = 0; |
319 | ETHER_MAP_IP_MULTICAST(&sin->sin_addr, LLADDR(out_ll)); |
320 | |
321 | return 0; |
322 | } |
323 | |
324 | static errno_t |
325 | ether_inet_prmod_ioctl(ifnet_t ifp, protocol_family_t protocol_family, |
326 | u_long command, void *data) |
327 | { |
328 | #pragma unused(protocol_family) |
329 | int error = 0; |
330 | |
331 | switch (command) { |
332 | case SIOCSIFADDR: /* struct ifaddr pointer */ |
333 | case SIOCAIFADDR: { /* struct ifaddr pointer */ |
334 | /* |
335 | * Note: caller of ifnet_ioctl() passes in pointer to |
336 | * struct ifaddr as parameter to SIOC{A,S}IFADDR, for |
337 | * legacy reasons. |
338 | */ |
339 | struct ifaddr *ifa = data; |
340 | |
341 | if (!(ifnet_flags(interface: ifp) & IFF_RUNNING)) { |
342 | ifnet_set_flags(interface: ifp, IFF_UP, IFF_UP); |
343 | ifnet_ioctl(interface: ifp, protocol: 0, SIOCSIFFLAGS, NULL); |
344 | } |
345 | |
346 | if (ifaddr_address_family(ifaddr: ifa) != AF_INET) { |
347 | break; |
348 | } |
349 | |
350 | inet_arp_init_ifaddr(ifp, ifa); |
351 | |
352 | if (command != SIOCSIFADDR) { |
353 | break; |
354 | } |
355 | |
356 | /* |
357 | * Register new IP and MAC addresses with the kernel |
358 | * debugger if the interface is the same as was registered |
359 | * by IOKernelDebugger. If no interface was registered, |
360 | * fall back and just match against en0 interface. |
361 | * Do this only for the first address of the interface |
362 | * and not for aliases. |
363 | */ |
364 | if ((kdp_get_interface() != 0 && |
365 | kdp_get_interface() == ifp->if_softc) || |
366 | (kdp_get_interface() == 0 && ifp->if_unit == 0)) { |
367 | kdp_set_ip_and_mac_addresses(ipaddr: &(IA_SIN(ifa)->sin_addr), |
368 | macaddr: (struct ether_addr *)IF_LLADDR(ifp)); |
369 | } |
370 | break; |
371 | } |
372 | |
373 | case SIOCGIFADDR: { /* struct ifreq */ |
374 | struct ifreq *ifr = data; |
375 | ifnet_guarded_lladdr_copy_bytes(interface: ifp, lladdr: ifr->ifr_addr.sa_data, |
376 | ETHER_ADDR_LEN); |
377 | break; |
378 | } |
379 | |
380 | default: |
381 | error = EOPNOTSUPP; |
382 | break; |
383 | } |
384 | |
385 | return error; |
386 | } |
387 | |
388 | static void |
389 | ether_inet_event(ifnet_t ifp, protocol_family_t protocol, |
390 | const struct kev_msg *event) |
391 | { |
392 | #pragma unused(protocol) |
393 | ifaddr_t *addresses; |
394 | |
395 | if (event->vendor_code != KEV_VENDOR_APPLE || |
396 | event->kev_class != KEV_NETWORK_CLASS || |
397 | event->kev_subclass != KEV_DL_SUBCLASS || |
398 | event->event_code != KEV_DL_LINK_ADDRESS_CHANGED) { |
399 | return; |
400 | } |
401 | |
402 | if (ifnet_get_address_list_family(interface: ifp, addresses: &addresses, AF_INET) == 0) { |
403 | int i; |
404 | |
405 | for (i = 0; addresses[i] != NULL; i++) { |
406 | inet_arp_init_ifaddr(ifp, addresses[i]); |
407 | } |
408 | |
409 | ifnet_free_address_list(addresses); |
410 | } |
411 | } |
412 | |
413 | static errno_t |
414 | ether_inet_arp(ifnet_t ifp, u_short arpop, const struct sockaddr_dl *sender_hw, |
415 | const struct sockaddr *sender_proto, const struct sockaddr_dl *target_hw, |
416 | const struct sockaddr *target_proto) |
417 | { |
418 | mbuf_t m; |
419 | errno_t result; |
420 | struct ether_header *eh; |
421 | struct ether_arp *ea; |
422 | const struct sockaddr_in *sender_ip = |
423 | SIN(sender_proto); |
424 | const struct sockaddr_inarp *target_ip = |
425 | __SA_UTILS_CONV_TO_SOCKADDR_INARP(target_proto); |
426 | char *datap; |
427 | |
428 | if (target_ip == NULL) { |
429 | return EINVAL; |
430 | } |
431 | |
432 | if ((sender_ip && sender_ip->sin_family != AF_INET) || |
433 | target_ip->sin_family != AF_INET) { |
434 | return EAFNOSUPPORT; |
435 | } |
436 | |
437 | result = mbuf_gethdr(how: MBUF_DONTWAIT, type: MBUF_TYPE_DATA, mbuf: &m); |
438 | if (result != 0) { |
439 | return result; |
440 | } |
441 | |
442 | mbuf_setlen(mbuf: m, len: sizeof(*ea)); |
443 | mbuf_pkthdr_setlen(mbuf: m, len: sizeof(*ea)); |
444 | |
445 | /* Move the data pointer in the mbuf to the end, aligned to 4 bytes */ |
446 | datap = mbuf_datastart(mbuf: m); |
447 | datap += mbuf_trailingspace(mbuf: m); |
448 | datap -= (((uintptr_t)datap) & 0x3); |
449 | mbuf_setdata(mbuf: m, data: datap, len: sizeof(*ea)); |
450 | ea = mbuf_data(mbuf: m); |
451 | |
452 | /* |
453 | * Prepend the ethernet header, we will send the raw frame; |
454 | * callee frees the original mbuf when allocation fails. |
455 | */ |
456 | result = mbuf_prepend(mbuf: &m, len: sizeof(*eh), how: MBUF_DONTWAIT); |
457 | if (result != 0) { |
458 | return result; |
459 | } |
460 | |
461 | eh = mbuf_data(mbuf: m); |
462 | eh->ether_type = htons(ETHERTYPE_ARP); |
463 | |
464 | /* Fill out the arp header */ |
465 | ea->arp_pro = htons(ETHERTYPE_IP); |
466 | ea->arp_hln = sizeof(ea->arp_sha); |
467 | ea->arp_pln = sizeof(ea->arp_spa); |
468 | ea->arp_hrd = htons(ARPHRD_ETHER); |
469 | ea->arp_op = htons(arpop); |
470 | |
471 | /* Sender Hardware */ |
472 | if (sender_hw != NULL) { |
473 | bcopy(CONST_LLADDR(sender_hw), dst: ea->arp_sha, |
474 | n: sizeof(ea->arp_sha)); |
475 | } else { |
476 | ifnet_lladdr_copy_bytes(interface: ifp, lladdr: ea->arp_sha, ETHER_ADDR_LEN); |
477 | } |
478 | ifnet_lladdr_copy_bytes(interface: ifp, lladdr: eh->ether_shost, length: sizeof(eh->ether_shost)); |
479 | |
480 | /* Sender IP */ |
481 | if (sender_ip != NULL) { |
482 | bcopy(src: &sender_ip->sin_addr, dst: ea->arp_spa, n: sizeof(ea->arp_spa)); |
483 | } else { |
484 | struct ifaddr *ifa; |
485 | |
486 | /* Look for an IP address to use as our source */ |
487 | ifnet_lock_shared(ifp); |
488 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
489 | IFA_LOCK(ifa); |
490 | if (ifa->ifa_addr != NULL && |
491 | ifa->ifa_addr->sa_family == AF_INET) { |
492 | bcopy(src: &(SIN(ifa->ifa_addr))->sin_addr, dst: ea->arp_spa, |
493 | n: sizeof(ea->arp_spa)); |
494 | IFA_UNLOCK(ifa); |
495 | break; |
496 | } |
497 | IFA_UNLOCK(ifa); |
498 | } |
499 | ifnet_lock_done(ifp); |
500 | |
501 | if (ifa == NULL) { |
502 | mbuf_freem(mbuf: m); |
503 | return ENXIO; |
504 | } |
505 | } |
506 | |
507 | /* Target Hardware */ |
508 | if (target_hw == NULL) { |
509 | bzero(s: ea->arp_tha, n: sizeof(ea->arp_tha)); |
510 | bcopy(src: etherbroadcastaddr, dst: eh->ether_dhost, |
511 | n: sizeof(eh->ether_dhost)); |
512 | m->m_flags |= M_BCAST; |
513 | } else { |
514 | bcopy(CONST_LLADDR(target_hw), dst: ea->arp_tha, |
515 | n: sizeof(ea->arp_tha)); |
516 | bcopy(CONST_LLADDR(target_hw), dst: eh->ether_dhost, |
517 | n: sizeof(eh->ether_dhost)); |
518 | |
519 | if (bcmp(s1: eh->ether_dhost, s2: etherbroadcastaddr, |
520 | ETHER_ADDR_LEN) == 0) { |
521 | m->m_flags |= M_BCAST; |
522 | } |
523 | } |
524 | |
525 | /* Target IP */ |
526 | bcopy(src: &target_ip->sin_addr, dst: ea->arp_tpa, n: sizeof(ea->arp_tpa)); |
527 | |
528 | /* |
529 | * PKTF_{INET,INET6}_RESOLVE_RTR are mutually exclusive, so make |
530 | * sure only one of them is set (just in case.) |
531 | */ |
532 | m->m_pkthdr.pkt_flags &= ~(PKTF_INET6_RESOLVE | PKTF_RESOLVE_RTR); |
533 | m->m_pkthdr.pkt_flags |= PKTF_INET_RESOLVE; |
534 | /* |
535 | * If this is an ARP request for a (default) router, mark |
536 | * the packet accordingly so that the driver can find out, |
537 | * in case it needs to perform driver-specific action(s). |
538 | */ |
539 | if (arpop == ARPOP_REQUEST && (target_ip->sin_other & SIN_ROUTER)) { |
540 | m->m_pkthdr.pkt_flags |= PKTF_RESOLVE_RTR; |
541 | } |
542 | |
543 | if (ifp->if_eflags & IFEF_TXSTART) { |
544 | /* |
545 | * Use control service class if the interface |
546 | * supports transmit-start model |
547 | */ |
548 | (void) m_set_service_class(m, MBUF_SC_CTL); |
549 | } |
550 | |
551 | ifnet_output_raw(interface: ifp, IS_INTF_CLAT46(ifp) ? 0 : AF_INET, packet: m); |
552 | |
553 | return 0; |
554 | } |
555 | |
556 | errno_t |
557 | ether_attach_inet(struct ifnet *ifp, protocol_family_t proto_family) |
558 | { |
559 | #pragma unused(proto_family) |
560 | struct ifnet_attach_proto_param_v2 proto; |
561 | struct ifnet_demux_desc demux[2]; |
562 | u_short en_native = htons(ETHERTYPE_IP); |
563 | u_short arp_native = htons(ETHERTYPE_ARP); |
564 | errno_t error; |
565 | |
566 | bzero(s: &demux[0], n: sizeof(demux)); |
567 | demux[0].type = DLIL_DESC_ETYPE2; |
568 | demux[0].data = &en_native; |
569 | demux[0].datalen = sizeof(en_native); |
570 | demux[1].type = DLIL_DESC_ETYPE2; |
571 | demux[1].data = &arp_native; |
572 | demux[1].datalen = sizeof(arp_native); |
573 | |
574 | bzero(s: &proto, n: sizeof(proto)); |
575 | proto.demux_list = demux; |
576 | proto.demux_count = sizeof(demux) / sizeof(demux[0]); |
577 | proto.input = ether_inet_input; |
578 | proto.pre_output = ether_inet_pre_output; |
579 | proto.ioctl = ether_inet_prmod_ioctl; |
580 | proto.event = ether_inet_event; |
581 | proto.resolve = ether_inet_resolve_multi; |
582 | proto.send_arp = ether_inet_arp; |
583 | |
584 | error = ifnet_attach_protocol_v2(interface: ifp, protocol_family: proto_family, proto_details: &proto); |
585 | if (error && error != EEXIST) { |
586 | printf("WARNING: %s can't attach ip to %s\n" , __func__, |
587 | if_name(ifp)); |
588 | } |
589 | return error; |
590 | } |
591 | |
592 | void |
593 | ether_detach_inet(struct ifnet *ifp, protocol_family_t proto_family) |
594 | { |
595 | (void) ifnet_detach_protocol(interface: ifp, protocol_family: proto_family); |
596 | } |
597 | |