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[netbsd-mini2440.git] / sys / net / if.h
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1 /* $NetBSD: if.h,v 1.144 2009/09/11 22:06:29 dyoung Exp $ */
2
3 /*-
4 * Copyright (c) 1999, 2000, 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by William Studenmund and Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1982, 1986, 1989, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. 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 * @(#)if.h 8.3 (Berkeley) 2/9/95
61 */
62
63 #ifndef _NET_IF_H_
64 #define _NET_IF_H_
65
66 #include <sys/featuretest.h>
67
68 /*
69 * Length of interface external name, including terminating '\0'.
70 * Note: this is the same size as a generic device's external name.
71 */
72 #define IF_NAMESIZE 16
73
74 #if defined(_NETBSD_SOURCE)
75
76 #include <sys/mutex.h>
77 #include <sys/condvar.h>
78 #include <sys/socket.h>
79 #include <sys/queue.h>
80 #include <net/dlt.h>
81 #include <net/pfil.h>
82
83 /*
84 * Always include ALTQ glue here -- we use the ALTQ interface queue
85 * structure even when ALTQ is not configured into the kernel so that
86 * the size of struct ifnet does not changed based on the option. The
87 * ALTQ queue structure is API-compatible with the legacy ifqueue.
88 */
89 #include <altq/if_altq.h>
90
91 /*
92 * Structures defining a network interface, providing a packet
93 * transport mechanism (ala level 0 of the PUP protocols).
94 *
95 * Each interface accepts output datagrams of a specified maximum
96 * length, and provides higher level routines with input datagrams
97 * received from its medium.
98 *
99 * Output occurs when the routine if_output is called, with four parameters:
100 * (*ifp->if_output)(ifp, m, dst, rt)
101 * Here m is the mbuf chain to be sent and dst is the destination address.
102 * The output routine encapsulates the supplied datagram if necessary,
103 * and then transmits it on its medium.
104 *
105 * On input, each interface unwraps the data received by it, and either
106 * places it on the input queue of a internetwork datagram routine
107 * and posts the associated software interrupt, or passes the datagram to a raw
108 * packet input routine.
109 *
110 * Routines exist for locating interfaces by their addresses
111 * or for locating a interface on a certain network, as well as more general
112 * routing and gateway routines maintaining information used to locate
113 * interfaces. These routines live in the files if.c and route.c
114 */
115 /* XXX fast fix for SNMP, going away soon */
116 #include <sys/time.h>
117
118 #if defined(_KERNEL_OPT)
119 #include "opt_compat_netbsd.h"
120 #endif
121
122 struct mbuf;
123 struct proc;
124 struct rtentry;
125 struct socket;
126 struct ether_header;
127 struct ifaddr;
128 struct ifnet;
129 struct rt_addrinfo;
130
131 #define IFNAMSIZ IF_NAMESIZE
132
133 /*
134 * Structure describing a `cloning' interface.
135 */
136 struct if_clone {
137 LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */
138 const char *ifc_name; /* name of device, e.g. `gif' */
139 size_t ifc_namelen; /* length of name */
140
141 int (*ifc_create)(struct if_clone *, int);
142 int (*ifc_destroy)(struct ifnet *);
143 };
144
145 #define IF_CLONE_INITIALIZER(name, create, destroy) \
146 { { NULL, NULL }, name, sizeof(name) - 1, create, destroy }
147
148 /*
149 * Structure used to query names of interface cloners.
150 */
151 struct if_clonereq {
152 int ifcr_total; /* total cloners (out) */
153 int ifcr_count; /* room for this many in user buffer */
154 char *ifcr_buffer; /* buffer for cloner names */
155 };
156
157 /*
158 * Structure defining statistics and other data kept regarding a network
159 * interface.
160 */
161 struct if_data {
162 /* generic interface information */
163 u_char ifi_type; /* ethernet, tokenring, etc. */
164 u_char ifi_addrlen; /* media address length */
165 u_char ifi_hdrlen; /* media header length */
166 int ifi_link_state; /* current link state */
167 uint64_t ifi_mtu; /* maximum transmission unit */
168 uint64_t ifi_metric; /* routing metric (external only) */
169 uint64_t ifi_baudrate; /* linespeed */
170 /* volatile statistics */
171 uint64_t ifi_ipackets; /* packets received on interface */
172 uint64_t ifi_ierrors; /* input errors on interface */
173 uint64_t ifi_opackets; /* packets sent on interface */
174 uint64_t ifi_oerrors; /* output errors on interface */
175 uint64_t ifi_collisions; /* collisions on csma interfaces */
176 uint64_t ifi_ibytes; /* total number of octets received */
177 uint64_t ifi_obytes; /* total number of octets sent */
178 uint64_t ifi_imcasts; /* packets received via multicast */
179 uint64_t ifi_omcasts; /* packets sent via multicast */
180 uint64_t ifi_iqdrops; /* dropped on input, this interface */
181 uint64_t ifi_noproto; /* destined for unsupported protocol */
182 struct timespec ifi_lastchange;/* last operational state change */
183 };
184
185 /*
186 * Values for if_link_state.
187 */
188 #define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */
189 #define LINK_STATE_DOWN 1 /* link is down */
190 #define LINK_STATE_UP 2 /* link is up */
191
192 /*
193 * Structure defining a queue for a network interface.
194 */
195 struct ifqueue {
196 struct mbuf *ifq_head;
197 struct mbuf *ifq_tail;
198 int ifq_len;
199 int ifq_maxlen;
200 int ifq_drops;
201 };
202
203 /*
204 * Structure defining a queue for a network interface.
205 *
206 * (Would like to call this struct ``if'', but C isn't PL/1.)
207 */
208 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */
209
210 struct ifnet { /* and the entries */
211 void *if_softc; /* lower-level data for this if */
212 TAILQ_ENTRY(ifnet) if_list; /* all struct ifnets are chained */
213 TAILQ_HEAD(, ifaddr) if_addrlist; /* linked list of addresses per if */
214 char if_xname[IFNAMSIZ]; /* external name (name + unit) */
215 int if_pcount; /* number of promiscuous listeners */
216 void * if_bpf; /* packet filter structure */
217 u_short if_index; /* numeric abbreviation for this if */
218 short if_timer; /* time 'til if_watchdog called */
219 short if_flags; /* up/down, broadcast, etc. */
220 short if__pad1; /* be nice to m68k ports */
221 struct if_data if_data; /* statistics and other data about if */
222 /*
223 * Procedure handles. If you add more of these, don't forget the
224 * corresponding NULL stub in if.c.
225 */
226 int (*if_output) /* output routine (enqueue) */
227 (struct ifnet *, struct mbuf *, const struct sockaddr *,
228 struct rtentry *);
229 void (*if_input) /* input routine (from h/w driver) */
230 (struct ifnet *, struct mbuf *);
231 void (*if_start) /* initiate output routine */
232 (struct ifnet *);
233 int (*if_ioctl) /* ioctl routine */
234 (struct ifnet *, u_long, void *);
235 int (*if_init) /* init routine */
236 (struct ifnet *);
237 void (*if_stop) /* stop routine */
238 (struct ifnet *, int);
239 void (*if_watchdog) /* timer routine */
240 (struct ifnet *);
241 void (*if_drain) /* routine to release resources */
242 (struct ifnet *);
243 struct ifaltq if_snd; /* output queue (includes altq) */
244 struct ifaddr *if_dl; /* identity of this interface. */
245 const struct sockaddr_dl *if_sadl; /* pointer to sockaddr_dl
246 * of if_dl
247 */
248 /* if_hwdl: h/w identity
249 *
250 * May be NULL. If not NULL, it is the address assigned
251 * to the interface by the manufacturer, so it very likely
252 * to be unique. It MUST NOT be deleted. It is highly
253 * suitable for deriving the EUI64 for the interface.
254 */
255 struct ifaddr *if_hwdl;
256 const uint8_t *if_broadcastaddr;/* linklevel broadcast bytestring */
257 void *if_bridge; /* bridge glue */
258 int if_dlt; /* data link type (<net/dlt.h>) */
259 struct pfil_head if_pfil; /* filtering point */
260 uint64_t if_capabilities; /* interface capabilities */
261 uint64_t if_capenable; /* capabilities enabled */
262 union {
263 void * carp_s; /* carp structure (used by !carp ifs) */
264 struct ifnet *carp_d;/* ptr to carpdev (used by carp ifs) */
265 } if_carp_ptr;
266 #define if_carp if_carp_ptr.carp_s
267 #define if_carpdev if_carp_ptr.carp_d
268 /*
269 * These are pre-computed based on an interfaces enabled
270 * capabilities, for speed elsewhere.
271 */
272 int if_csum_flags_tx; /* M_CSUM_* flags for Tx */
273 int if_csum_flags_rx; /* M_CSUM_* flags for Rx */
274
275 void *if_afdata[AF_MAX];
276 struct mowner *if_mowner; /* who owns mbufs for this interface */
277
278 void *if_agrprivate; /* used only when #if NAGR > 0 */
279
280 /*
281 * pf specific data, used only when #if NPF > 0.
282 */
283 void *if_pf_kif; /* pf interface abstraction */
284 void *if_pf_groups; /* pf interface groups */
285 /*
286 * During an ifnet's lifetime, it has only one if_index, but
287 * and if_index is not sufficient to identify an ifnet
288 * because during the lifetime of the system, many ifnets may occupy a
289 * given if_index. Let us tell different ifnets at the same
290 * if_index apart by their if_index_gen, a unique number that each ifnet
291 * is assigned when it if_attach()s. Now, the kernel can use the
292 * pair (if_index, if_index_gen) as a weak reference to an ifnet.
293 */
294 uint64_t if_index_gen; /* generation number for the ifnet
295 * at if_index: if two ifnets' index
296 * and generation number are both the
297 * same, they are the same ifnet.
298 */
299 struct sysctllog *if_sysctl_log;
300 };
301 #define if_mtu if_data.ifi_mtu
302 #define if_type if_data.ifi_type
303 #define if_addrlen if_data.ifi_addrlen
304 #define if_hdrlen if_data.ifi_hdrlen
305 #define if_metric if_data.ifi_metric
306 #define if_link_state if_data.ifi_link_state
307 #define if_baudrate if_data.ifi_baudrate
308 #define if_ipackets if_data.ifi_ipackets
309 #define if_ierrors if_data.ifi_ierrors
310 #define if_opackets if_data.ifi_opackets
311 #define if_oerrors if_data.ifi_oerrors
312 #define if_collisions if_data.ifi_collisions
313 #define if_ibytes if_data.ifi_ibytes
314 #define if_obytes if_data.ifi_obytes
315 #define if_imcasts if_data.ifi_imcasts
316 #define if_omcasts if_data.ifi_omcasts
317 #define if_iqdrops if_data.ifi_iqdrops
318 #define if_noproto if_data.ifi_noproto
319 #define if_lastchange if_data.ifi_lastchange
320
321 #define IFF_UP 0x0001 /* interface is up */
322 #define IFF_BROADCAST 0x0002 /* broadcast address valid */
323 #define IFF_DEBUG 0x0004 /* turn on debugging */
324 #define IFF_LOOPBACK 0x0008 /* is a loopback net */
325 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */
326 #define IFF_NOTRAILERS 0x0020 /* avoid use of trailers */
327 #define IFF_RUNNING 0x0040 /* resources allocated */
328 #define IFF_NOARP 0x0080 /* no address resolution protocol */
329 #define IFF_PROMISC 0x0100 /* receive all packets */
330 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */
331 #define IFF_OACTIVE 0x0400 /* transmission in progress */
332 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */
333 #define IFF_LINK0 0x1000 /* per link layer defined bit */
334 #define IFF_LINK1 0x2000 /* per link layer defined bit */
335 #define IFF_LINK2 0x4000 /* per link layer defined bit */
336 #define IFF_MULTICAST 0x8000 /* supports multicast */
337
338 #define IFFBITS \
339 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS" \
340 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \
341 "\15LINK0\16LINK1\17LINK2\20MULTICAST"
342
343 /* flags set internally only: */
344 #define IFF_CANTCHANGE \
345 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
346 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC)
347
348 /*
349 * Some convenience macros used for setting ifi_baudrate.
350 * XXX 1000 vs. 1024? --thorpej@NetBSD.org
351 */
352 #define IF_Kbps(x) ((x) * 1000) /* kilobits/sec. */
353 #define IF_Mbps(x) (IF_Kbps((x) * 1000)) /* megabits/sec. */
354 #define IF_Gbps(x) (IF_Mbps((x) * 1000)) /* gigabits/sec. */
355
356 /* Capabilities that interfaces can advertise. */
357 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */
358 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */
359 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */
360 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */
361 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */
362 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */
363 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */
364 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */
365 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */
366 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */
367 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */
368 #define IFCAP_TSOv6 0x40000 /* can do TCPv6 segmentation offload */
369
370 #define IFCAPBITS \
371 "\020" \
372 "\10TSO4" \
373 "\11IP4CSUM_Rx" \
374 "\12IP4CSUM_Tx" \
375 "\13TCP4CSUM_Rx" \
376 "\14TCP4CSUM_Tx" \
377 "\15UDP4CSUM_Rx" \
378 "\16UDP4CSUM_Tx" \
379 "\17TCP6CSUM_Rx" \
380 "\20TCP6CSUM_Tx" \
381 "\21UDP6CSUM_Rx" \
382 "\22UDP6CSUM_Tx" \
383 "\23TSO6"
384
385 /*
386 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1)
387 * input routines have queues of messages stored on ifqueue structures
388 * (defined above). Entries are added to and deleted from these structures
389 * by these macros, which should be called with ipl raised to splnet().
390 */
391 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
392 #define IF_DROP(ifq) ((ifq)->ifq_drops++)
393 #define IF_ENQUEUE(ifq, m) do { \
394 (m)->m_nextpkt = 0; \
395 if ((ifq)->ifq_tail == 0) \
396 (ifq)->ifq_head = m; \
397 else \
398 (ifq)->ifq_tail->m_nextpkt = m; \
399 (ifq)->ifq_tail = m; \
400 (ifq)->ifq_len++; \
401 } while (/*CONSTCOND*/0)
402 #define IF_PREPEND(ifq, m) do { \
403 (m)->m_nextpkt = (ifq)->ifq_head; \
404 if ((ifq)->ifq_tail == 0) \
405 (ifq)->ifq_tail = (m); \
406 (ifq)->ifq_head = (m); \
407 (ifq)->ifq_len++; \
408 } while (/*CONSTCOND*/0)
409 #define IF_DEQUEUE(ifq, m) do { \
410 (m) = (ifq)->ifq_head; \
411 if (m) { \
412 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
413 (ifq)->ifq_tail = 0; \
414 (m)->m_nextpkt = 0; \
415 (ifq)->ifq_len--; \
416 } \
417 } while (/*CONSTCOND*/0)
418 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
419 #define IF_PURGE(ifq) \
420 do { \
421 struct mbuf *__m0; \
422 \
423 for (;;) { \
424 IF_DEQUEUE((ifq), __m0); \
425 if (__m0 == NULL) \
426 break; \
427 else \
428 m_freem(__m0); \
429 } \
430 } while (/*CONSTCOND*/ 0)
431 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
432
433 #ifndef IFQ_MAXLEN
434 #define IFQ_MAXLEN 256
435 #endif
436 #define IFNET_SLOWHZ 1 /* granularity is 1 second */
437
438 /*
439 * Structure defining statistics and other data kept regarding an address
440 * on a network interface.
441 */
442 struct ifaddr_data {
443 int64_t ifad_inbytes;
444 int64_t ifad_outbytes;
445 };
446
447 /*
448 * The ifaddr structure contains information about one address
449 * of an interface. They are maintained by the different address families,
450 * are allocated and attached when an address is set, and are linked
451 * together so all addresses for an interface can be located.
452 */
453 struct ifaddr {
454 struct sockaddr *ifa_addr; /* address of interface */
455 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
456 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
457 struct sockaddr *ifa_netmask; /* used to determine subnet */
458 struct ifnet *ifa_ifp; /* back-pointer to interface */
459 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */
460 struct ifaddr_data ifa_data; /* statistics on the address */
461 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
462 (int, struct rtentry *, const struct rt_addrinfo *);
463 u_int ifa_flags; /* mostly rt_flags for cloning */
464 int ifa_refcnt; /* count of references */
465 int ifa_metric; /* cost of going out this interface */
466 struct ifaddr *(*ifa_getifa)(struct ifaddr *,
467 const struct sockaddr *);
468 uint32_t *ifa_seqno;
469 int16_t ifa_preference; /* preference level for this address */
470 };
471 #define IFA_ROUTE RTF_UP /* (0x01) route installed */
472
473 /*
474 * Message format for use in obtaining information about interfaces
475 * from sysctl and the routing socket.
476 */
477 struct if_msghdr {
478 u_short ifm_msglen; /* to skip over non-understood messages */
479 u_char ifm_version; /* future binary compatibility */
480 u_char ifm_type; /* message type */
481 int ifm_addrs; /* like rtm_addrs */
482 int ifm_flags; /* value of if_flags */
483 u_short ifm_index; /* index for associated ifp */
484 struct if_data ifm_data;/* statistics and other data about if */
485 };
486
487 /*
488 * Message format for use in obtaining information about interface addresses
489 * from sysctl and the routing socket.
490 */
491 struct ifa_msghdr {
492 u_short ifam_msglen; /* to skip over non-understood messages */
493 u_char ifam_version; /* future binary compatibility */
494 u_char ifam_type; /* message type */
495 int ifam_addrs; /* like rtm_addrs */
496 int ifam_flags; /* value of ifa_flags */
497 u_short ifam_index; /* index for associated ifp */
498 int ifam_metric; /* value of ifa_metric */
499 };
500
501 /*
502 * Message format announcing the arrival or departure of a network interface.
503 */
504 struct if_announcemsghdr {
505 u_short ifan_msglen; /* to skip over non-understood messages */
506 u_char ifan_version; /* future binary compatibility */
507 u_char ifan_type; /* message type */
508 u_short ifan_index; /* index for associated ifp */
509 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */
510 u_short ifan_what; /* what type of announcement */
511 };
512
513 #define IFAN_ARRIVAL 0 /* interface arrival */
514 #define IFAN_DEPARTURE 1 /* interface departure */
515
516 /*
517 * Interface request structure used for socket
518 * ioctl's. All interface ioctl's must have parameter
519 * definitions which begin with ifr_name. The
520 * remainder may be interface specific.
521 */
522 struct ifreq {
523 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
524 union {
525 struct sockaddr ifru_addr;
526 struct sockaddr ifru_dstaddr;
527 struct sockaddr ifru_broadaddr;
528 struct sockaddr_storage ifru_space;
529 short ifru_flags;
530 int ifru_metric;
531 int ifru_mtu;
532 int ifru_dlt;
533 u_int ifru_value;
534 void * ifru_data;
535 struct {
536 uint32_t b_buflen;
537 void *b_buf;
538 } ifru_b;
539 } ifr_ifru;
540 #define ifr_addr ifr_ifru.ifru_addr /* address */
541 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */
542 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
543 #define ifr_space ifr_ifru.ifru_space /* sockaddr_storage */
544 #define ifr_flags ifr_ifru.ifru_flags /* flags */
545 #define ifr_metric ifr_ifru.ifru_metric /* metric */
546 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
547 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */
548 #define ifr_value ifr_ifru.ifru_value /* generic value */
549 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */
550 #define ifr_data ifr_ifru.ifru_data /* for use by interface
551 * XXX deprecated
552 */
553 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */
554 #define ifr_buflen ifr_ifru.ifru_b.b_buflen
555 };
556
557 #ifdef _KERNEL
558 #define ifreq_setdstaddr ifreq_setaddr
559 #define ifreq_setbroadaddr ifreq_setaddr
560 #define ifreq_getdstaddr ifreq_getaddr
561 #define ifreq_getbroadaddr ifreq_getaddr
562
563 static inline const struct sockaddr *
564 ifreq_getaddr(u_long cmd, const struct ifreq *ifr)
565 {
566 return &ifr->ifr_addr;
567 }
568 #endif /* _KERNEL */
569
570 struct ifcapreq {
571 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
572 uint64_t ifcr_capabilities; /* supported capabiliites */
573 uint64_t ifcr_capenable; /* capabilities enabled */
574 };
575
576 struct ifaliasreq {
577 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
578 struct sockaddr ifra_addr;
579 struct sockaddr ifra_dstaddr;
580 #define ifra_broadaddr ifra_dstaddr
581 struct sockaddr ifra_mask;
582 };
583
584 struct ifdatareq {
585 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
586 struct if_data ifdr_data;
587 };
588
589 struct ifmediareq {
590 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */
591 int ifm_current; /* current media options */
592 int ifm_mask; /* don't care mask */
593 int ifm_status; /* media status */
594 int ifm_active; /* active options */
595 int ifm_count; /* # entries in ifm_ulist
596 array */
597 int *ifm_ulist; /* media words */
598 };
599
600
601 struct ifdrv {
602 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */
603 unsigned long ifd_cmd;
604 size_t ifd_len;
605 void *ifd_data;
606 };
607
608 /*
609 * Structure used in SIOCGIFCONF request.
610 * Used to retrieve interface configuration
611 * for machine (useful for programs which
612 * must know all networks accessible).
613 */
614 struct ifconf {
615 int ifc_len; /* size of associated buffer */
616 union {
617 void * ifcu_buf;
618 struct ifreq *ifcu_req;
619 } ifc_ifcu;
620 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
621 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */
622 };
623
624 /*
625 * Structure for SIOC[AGD]LIFADDR
626 */
627 struct if_laddrreq {
628 char iflr_name[IFNAMSIZ];
629 unsigned int flags;
630 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */
631 #define IFLR_ACTIVE 0x4000 /* in/out: link-layer address activation */
632 #define IFLR_FACTORY 0x2000 /* in/out: factory link-layer address */
633 unsigned int prefixlen; /* in/out */
634 struct sockaddr_storage addr; /* in/out */
635 struct sockaddr_storage dstaddr; /* out */
636 };
637
638 /*
639 * Structure for SIOC[SG]IFADDRPREF
640 */
641 struct if_addrprefreq {
642 char ifap_name[IFNAMSIZ];
643 int16_t ifap_preference; /* in/out */
644 struct sockaddr_storage ifap_addr; /* in/out */
645 };
646
647 #include <net/if_arp.h>
648
649 #endif /* _NETBSD_SOURCE */
650
651 #ifdef _KERNEL
652 #ifdef IFAREF_DEBUG
653 #define IFAREF(ifa) \
654 do { \
655 printf("IFAREF: %s:%d %p -> %d\n", __FILE__, __LINE__, \
656 (ifa), ++(ifa)->ifa_refcnt); \
657 } while (/*CONSTCOND*/ 0)
658
659 #define IFAFREE(ifa) \
660 do { \
661 if ((ifa)->ifa_refcnt <= 0) \
662 panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \
663 __LINE__, (ifa)); \
664 printf("IFAFREE: %s:%d %p -> %d\n", __FILE__, __LINE__, \
665 (ifa), --(ifa)->ifa_refcnt); \
666 if ((ifa)->ifa_refcnt == 0) \
667 ifafree(ifa); \
668 } while (/*CONSTCOND*/ 0)
669 #else
670 #define IFAREF(ifa) (ifa)->ifa_refcnt++
671
672 #ifdef DIAGNOSTIC
673 #define IFAFREE(ifa) \
674 do { \
675 if ((ifa)->ifa_refcnt <= 0) \
676 panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \
677 __LINE__, (ifa)); \
678 if (--(ifa)->ifa_refcnt == 0) \
679 ifafree(ifa); \
680 } while (/*CONSTCOND*/ 0)
681 #else
682 #define IFAFREE(ifa) \
683 do { \
684 if (--(ifa)->ifa_refcnt == 0) \
685 ifafree(ifa); \
686 } while (/*CONSTCOND*/ 0)
687 #endif /* DIAGNOSTIC */
688 #endif /* IFAREF_DEBUG */
689
690 #ifdef ALTQ
691 #define ALTQ_DECL(x) x
692 #define ALTQ_COMMA ,
693
694 #define IFQ_ENQUEUE(ifq, m, pattr, err) \
695 do { \
696 if (ALTQ_IS_ENABLED((ifq))) \
697 ALTQ_ENQUEUE((ifq), (m), (pattr), (err)); \
698 else { \
699 if (IF_QFULL((ifq))) { \
700 m_freem((m)); \
701 (err) = ENOBUFS; \
702 } else { \
703 IF_ENQUEUE((ifq), (m)); \
704 (err) = 0; \
705 } \
706 } \
707 if ((err)) \
708 (ifq)->ifq_drops++; \
709 } while (/*CONSTCOND*/ 0)
710
711 #define IFQ_DEQUEUE(ifq, m) \
712 do { \
713 if (TBR_IS_ENABLED((ifq))) \
714 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \
715 else if (ALTQ_IS_ENABLED((ifq))) \
716 ALTQ_DEQUEUE((ifq), (m)); \
717 else \
718 IF_DEQUEUE((ifq), (m)); \
719 } while (/*CONSTCOND*/ 0)
720
721 #define IFQ_POLL(ifq, m) \
722 do { \
723 if (TBR_IS_ENABLED((ifq))) \
724 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \
725 else if (ALTQ_IS_ENABLED((ifq))) \
726 ALTQ_POLL((ifq), (m)); \
727 else \
728 IF_POLL((ifq), (m)); \
729 } while (/*CONSTCOND*/ 0)
730
731 #define IFQ_PURGE(ifq) \
732 do { \
733 if (ALTQ_IS_ENABLED((ifq))) \
734 ALTQ_PURGE((ifq)); \
735 else \
736 IF_PURGE((ifq)); \
737 } while (/*CONSTCOND*/ 0)
738
739 #define IFQ_SET_READY(ifq) \
740 do { \
741 (ifq)->altq_flags |= ALTQF_READY; \
742 } while (/*CONSTCOND*/ 0)
743
744 #define IFQ_CLASSIFY(ifq, m, af, pattr) \
745 do { \
746 if (ALTQ_IS_ENABLED((ifq))) { \
747 if (ALTQ_NEEDS_CLASSIFY((ifq))) \
748 (pattr)->pattr_class = (*(ifq)->altq_classify) \
749 ((ifq)->altq_clfier, (m), (af)); \
750 (pattr)->pattr_af = (af); \
751 (pattr)->pattr_hdr = mtod((m), void *); \
752 } \
753 } while (/*CONSTCOND*/ 0)
754 #else /* ! ALTQ */
755 #define ALTQ_DECL(x) /* nothing */
756 #define ALTQ_COMMA
757
758 #define IFQ_ENQUEUE(ifq, m, pattr, err) \
759 do { \
760 if (IF_QFULL((ifq))) { \
761 m_freem((m)); \
762 (err) = ENOBUFS; \
763 } else { \
764 IF_ENQUEUE((ifq), (m)); \
765 (err) = 0; \
766 } \
767 if ((err)) \
768 (ifq)->ifq_drops++; \
769 } while (/*CONSTCOND*/ 0)
770
771 #define IFQ_DEQUEUE(ifq, m) IF_DEQUEUE((ifq), (m))
772
773 #define IFQ_POLL(ifq, m) IF_POLL((ifq), (m))
774
775 #define IFQ_PURGE(ifq) IF_PURGE((ifq))
776
777 #define IFQ_SET_READY(ifq) /* nothing */
778
779 #define IFQ_CLASSIFY(ifq, m, af, pattr) /* nothing */
780
781 #endif /* ALTQ */
782
783 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY((ifq))
784 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++)
785 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len)
786 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++)
787 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len))
788
789 #include <sys/mallocvar.h>
790 MALLOC_DECLARE(M_IFADDR);
791 MALLOC_DECLARE(M_IFMADDR);
792
793 #define IFNET_FIRST() TAILQ_FIRST(&ifnet)
794 #define IFNET_NEXT(__ifp) TAILQ_NEXT((__ifp), if_list)
795 #define IFNET_FOREACH(__ifp) TAILQ_FOREACH(__ifp, &ifnet, if_list)
796 #define IFADDR_FIRST(__ifp) TAILQ_FIRST(&(__ifp)->if_addrlist)
797 #define IFADDR_NEXT(__ifa) TAILQ_NEXT((__ifa), ifa_list)
798 #define IFADDR_FOREACH(__ifa, __ifp) TAILQ_FOREACH(__ifa, \
799 &(__ifp)->if_addrlist, ifa_list)
800 #define IFADDR_EMPTY(__ifp) TAILQ_EMPTY(&(__ifp)->if_addrlist)
801
802 extern struct ifnet_head ifnet;
803 extern struct ifnet **ifindex2ifnet;
804 extern struct ifnet *lo0ifp;
805 extern size_t if_indexlim;
806
807 void ether_input(struct ifnet *, struct mbuf *);
808
809 int ifreq_setaddr(u_long, struct ifreq *, const struct sockaddr *);
810
811 struct ifnet *if_alloc(u_char);
812 void if_initname(struct ifnet *, const char *, int);
813 struct ifaddr *if_dl_create(const struct ifnet *, const struct sockaddr_dl **);
814 void if_activate_sadl(struct ifnet *, struct ifaddr *,
815 const struct sockaddr_dl *);
816 void if_set_sadl(struct ifnet *, const void *, u_char, bool);
817 void if_alloc_sadl(struct ifnet *);
818 void if_free_sadl(struct ifnet *);
819 void if_attach(struct ifnet *);
820 void if_attachdomain(void);
821 void if_attachdomain1(struct ifnet *);
822 void if_deactivate(struct ifnet *);
823 void if_purgeaddrs(struct ifnet *, int, void (*)(struct ifaddr *));
824 void if_detach(struct ifnet *);
825 void if_down(struct ifnet *);
826 void if_link_state_change(struct ifnet *, int);
827 void if_slowtimo(void *);
828 void if_up(struct ifnet *);
829 int ifconf(u_long, void *);
830 void ifinit(void);
831 void ifinit1(void);
832 int ifaddrpref_ioctl(struct socket *, u_long, void *, struct ifnet *,
833 lwp_t *);
834 int ifioctl(struct socket *, u_long, void *, struct lwp *);
835 int ifioctl_common(struct ifnet *, u_long, void *);
836 int ifpromisc(struct ifnet *, int);
837 struct ifnet *ifunit(const char *);
838
839 void ifa_insert(struct ifnet *, struct ifaddr *);
840 void ifa_remove(struct ifnet *, struct ifaddr *);
841
842 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *);
843 struct ifaddr *ifa_ifwithaf(int);
844 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *);
845 struct ifaddr *ifa_ifwithnet(const struct sockaddr *);
846 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *);
847 struct ifaddr *ifa_ifwithroute(int, const struct sockaddr *,
848 const struct sockaddr *);
849 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *);
850 void ifafree(struct ifaddr *);
851 void link_rtrequest(int, struct rtentry *, const struct rt_addrinfo *);
852
853 void if_clone_attach(struct if_clone *);
854 void if_clone_detach(struct if_clone *);
855
856 int if_clone_create(const char *);
857 int if_clone_destroy(const char *);
858
859 int ifq_enqueue(struct ifnet *, struct mbuf * ALTQ_COMMA
860 ALTQ_DECL(struct altq_pktattr *));
861 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf * ALTQ_COMMA
862 ALTQ_DECL(struct altq_pktattr *));
863
864 int loioctl(struct ifnet *, u_long, void *);
865 void loopattach(int);
866 int looutput(struct ifnet *,
867 struct mbuf *, const struct sockaddr *, struct rtentry *);
868 void lortrequest(int, struct rtentry *, const struct rt_addrinfo *);
869
870 /*
871 * These are exported because they're an easy way to tell if
872 * an interface is going away without having to burn a flag.
873 */
874 int if_nulloutput(struct ifnet *, struct mbuf *,
875 const struct sockaddr *, struct rtentry *);
876 void if_nullinput(struct ifnet *, struct mbuf *);
877 void if_nullstart(struct ifnet *);
878 int if_nullioctl(struct ifnet *, u_long, void *);
879 int if_nullinit(struct ifnet *);
880 void if_nullstop(struct ifnet *, int);
881 void if_nullwatchdog(struct ifnet *);
882 void if_nulldrain(struct ifnet *);
883 #else
884 struct if_nameindex {
885 unsigned int if_index; /* 1, 2, ... */
886 char *if_name; /* null terminated name: "le0", ... */
887 };
888
889 #include <sys/cdefs.h>
890 __BEGIN_DECLS
891 unsigned int if_nametoindex(const char *);
892 char * if_indextoname(unsigned int, char *);
893 struct if_nameindex * if_nameindex(void);
894 void if_freenameindex(struct if_nameindex *);
895 __END_DECLS
896 #endif /* _KERNEL */ /* XXX really ALTQ? */
897
898 #ifdef _KERNEL
899 /*
900 * ifq sysctl support
901 */
902 int sysctl_ifq(int *name, u_int namelen, void *oldp,
903 size_t *oldlenp, void *newp, size_t newlen,
904 struct ifqueue *ifq);
905 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */
906 #define IFQCTL_LEN 1
907 #define IFQCTL_MAXLEN 2
908 #define IFQCTL_PEAK 3
909 #define IFQCTL_DROPS 4
910 #define IFQCTL_MAXID 5
911
912 #endif /* _KERNEL */
913
914 #ifdef _NETBSD_SOURCE
915 /*
916 * sysctl for ifq (per-protocol packet input queue variant of ifqueue)
917 */
918 #define CTL_IFQ_NAMES { \
919 { 0, 0 }, \
920 { "len", CTLTYPE_INT }, \
921 { "maxlen", CTLTYPE_INT }, \
922 { "peak", CTLTYPE_INT }, \
923 { "drops", CTLTYPE_INT }, \
924 }
925 #endif /* _NETBSD_SOURCE */
926 #endif /* !_NET_IF_H_ */
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