1 //==========================================================================
7 //==========================================================================
8 //####BSDCOPYRIGHTBEGIN####
10 // -------------------------------------------
12 // Portions of this software may have been derived from OpenBSD or other sources,
13 // and are covered by the appropriate copyright disclaimers included herein.
15 // -------------------------------------------
17 //####BSDCOPYRIGHTEND####
18 //==========================================================================
19 //#####DESCRIPTIONBEGIN####
22 // Contributors: gthomas
28 //####DESCRIPTIONEND####
30 //==========================================================================
33 /* $OpenBSD: if.h,v 1.14 1999/12/08 06:50:17 itojun Exp $ */
34 /* $NetBSD: if.h,v 1.23 1996/05/07 02:40:27 thorpej Exp $ */
37 * Copyright (c) 1982, 1986, 1989, 1993
38 * The Regents of the University of California. All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. All advertising materials mentioning features or use of this software
49 * must display the following acknowledgement:
50 * This product includes software developed by the University of
51 * California, Berkeley and its contributors.
52 * 4. Neither the name of the University nor the names of its contributors
53 * may be used to endorse or promote products derived from this software
54 * without specific prior written permission.
56 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
57 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
59 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
62 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
64 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
65 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68 * @(#)if.h 8.1 (Berkeley) 6/10/93
74 #include <sys/queue.h>
77 * Structures defining a network interface, providing a packet
78 * transport mechanism (ala level 0 of the PUP protocols).
80 * Each interface accepts output datagrams of a specified maximum
81 * length, and provides higher level routines with input datagrams
82 * received from its medium.
84 * Output occurs when the routine if_output is called, with four parameters:
85 * (*ifp->if_output)(ifp, m, dst, rt)
86 * Here m is the mbuf chain to be sent and dst is the destination address.
87 * The output routine encapsulates the supplied datagram if necessary,
88 * and then transmits it on its medium.
90 * On input, each interface unwraps the data received by it, and either
91 * places it on the input queue of a internetwork datagram routine
92 * and posts the associated software interrupt, or passes the datagram to a raw
93 * packet input routine.
95 * Routines exist for locating interfaces by their addresses
96 * or for locating a interface on a certain network, as well as more general
97 * routing and gateway routines maintaining information used to locate
98 * interfaces. These routines live in the files if.c and route.c
100 #include <sys/time.h>
110 * Structure defining statistics and other data kept regarding a network
114 /* generic interface information */
115 u_char ifi_type; /* ethernet, tokenring, etc. */
116 u_char ifi_addrlen; /* media address length */
117 u_char ifi_hdrlen; /* media header length */
118 u_long ifi_mtu; /* maximum transmission unit */
119 u_long ifi_metric; /* routing metric (external only) */
120 u_long ifi_baudrate; /* linespeed */
121 /* volatile statistics */
122 u_long ifi_ipackets; /* packets received on interface */
123 u_long ifi_ierrors; /* input errors on interface */
124 u_long ifi_opackets; /* packets sent on interface */
125 u_long ifi_oerrors; /* output errors on interface */
126 u_long ifi_collisions; /* collisions on csma interfaces */
127 u_long ifi_ibytes; /* total number of octets received */
128 u_long ifi_obytes; /* total number of octets sent */
129 u_long ifi_imcasts; /* packets received via multicast */
130 u_long ifi_omcasts; /* packets sent via multicast */
131 u_long ifi_iqdrops; /* dropped on input, this interface */
132 u_long ifi_noproto; /* destined for unsupported protocol */
133 struct timeval ifi_lastchange; /* last updated */
137 * Structure defining a queue for a network interface.
139 * (Would like to call this struct ``if'', but C isn't PL/1.)
141 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */
144 * Length of interface external name, including terminating '\0'.
145 * Note: this is the same size as a generic device's external name.
148 #define IF_NAMESIZE IFNAMSIZ
150 struct ifnet { /* and the entries */
151 void *if_softc; /* lower-level data for this if */
152 TAILQ_ENTRY(ifnet) if_list; /* all struct ifnets are chained */
153 TAILQ_HEAD(, ifaddr) if_addrlist; /* linked list of addresses per if */
154 char if_xname[IFNAMSIZ]; /* external name (name + unit) */
155 int if_pcount; /* number of promiscuous listeners */
156 caddr_t if_bpf; /* packet filter structure */
157 caddr_t if_bridge; /* bridge structure */
158 u_short if_index; /* numeric abbreviation for this if */
159 short if_timer; /* time 'til if_watchdog called */
160 short if_flags; /* up/down, broadcast, etc. */
161 struct if_data if_data; /* statistics and other data about if */
162 /* procedure handles */
163 int (*if_output) /* output routine (enqueue) */
164 __P((struct ifnet *, struct mbuf *, struct sockaddr *,
166 void (*if_start) /* initiate output routine */
167 __P((struct ifnet *));
168 int (*if_ioctl) /* ioctl routine */
169 __P((struct ifnet *, u_long, caddr_t));
170 int (*if_reset) /* XXX bus reset routine */
171 __P((struct ifnet *));
172 void (*if_watchdog) /* timer routine */
173 __P((struct ifnet *));
175 struct mbuf *ifq_head;
176 struct mbuf *ifq_tail;
180 } if_snd; /* output queue */
181 struct ifprefix *if_prefixlist; /* linked list of prefixes per if */
183 #define if_mtu if_data.ifi_mtu
184 #define if_type if_data.ifi_type
185 #define if_addrlen if_data.ifi_addrlen
186 #define if_hdrlen if_data.ifi_hdrlen
187 #define if_metric if_data.ifi_metric
188 #define if_baudrate if_data.ifi_baudrate
189 #define if_ipackets if_data.ifi_ipackets
190 #define if_ierrors if_data.ifi_ierrors
191 #define if_opackets if_data.ifi_opackets
192 #define if_oerrors if_data.ifi_oerrors
193 #define if_collisions if_data.ifi_collisions
194 #define if_ibytes if_data.ifi_ibytes
195 #define if_obytes if_data.ifi_obytes
196 #define if_imcasts if_data.ifi_imcasts
197 #define if_omcasts if_data.ifi_omcasts
198 #define if_iqdrops if_data.ifi_iqdrops
199 #define if_noproto if_data.ifi_noproto
200 #define if_lastchange if_data.ifi_lastchange
202 #define IFF_UP 0x1 /* interface is up */
203 #define IFF_BROADCAST 0x2 /* broadcast address valid */
204 #define IFF_DEBUG 0x4 /* turn on debugging */
205 #define IFF_LOOPBACK 0x8 /* is a loopback net */
206 #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */
207 #define IFF_NOTRAILERS 0x20 /* avoid use of trailers */
208 #define IFF_RUNNING 0x40 /* resources allocated */
209 #define IFF_NOARP 0x80 /* no address resolution protocol */
210 #define IFF_PROMISC 0x100 /* receive all packets */
211 #define IFF_ALLMULTI 0x200 /* receive all multicast packets */
212 #define IFF_OACTIVE 0x400 /* transmission in progress */
213 #define IFF_SIMPLEX 0x800 /* can't hear own transmissions */
214 #define IFF_LINK0 0x1000 /* per link layer defined bit */
215 #define IFF_LINK1 0x2000 /* per link layer defined bit */
216 #define IFF_LINK2 0x4000 /* per link layer defined bit */
217 #define IFF_MULTICAST 0x8000 /* supports multicast */
219 /* flags set internally only: */
220 #define IFF_CANTCHANGE \
221 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
222 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI)
225 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1)
226 * input routines have queues of messages stored on ifqueue structures
227 * (defined above). Entries are added to and deleted from these structures
228 * by these macros, which should be called with ipl raised to splimp().
230 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
231 #define IF_DROP(ifq) ((ifq)->ifq_drops++)
232 #define IF_ENQUEUE(ifq, m) { \
233 (m)->m_nextpkt = 0; \
234 if ((ifq)->ifq_tail == 0) \
235 (ifq)->ifq_head = m; \
237 (ifq)->ifq_tail->m_nextpkt = m; \
238 (ifq)->ifq_tail = m; \
241 #define IF_PREPEND(ifq, m) { \
242 (m)->m_nextpkt = (ifq)->ifq_head; \
243 if ((ifq)->ifq_tail == 0) \
244 (ifq)->ifq_tail = (m); \
245 (ifq)->ifq_head = (m); \
248 #define IF_DEQUEUE(ifq, m) { \
249 (m) = (ifq)->ifq_head; \
251 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
252 (ifq)->ifq_tail = 0; \
253 (m)->m_nextpkt = 0; \
257 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
259 #define IFQ_ENQUEUE(ifq, m, pattr, err) \
261 if (IF_QFULL((ifq))) { \
265 IF_ENQUEUE((ifq), (m)); \
269 (ifq)->ifq_drops++; \
272 #define IFQ_MAXLEN 50
273 #define IFNET_SLOWHZ 1 /* granularity is 1 second */
276 * The ifaddr structure contains information about one address
277 * of an interface. They are maintained by the different address families,
278 * are allocated and attached when an address is set, and are linked
279 * together so all addresses for an interface can be located.
282 struct sockaddr *ifa_addr; /* address of interface */
283 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
284 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
285 struct sockaddr *ifa_netmask; /* used to determine subnet */
286 struct ifnet *ifa_ifp; /* back-pointer to interface */
287 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */
288 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
289 __P((int, struct rtentry *, struct sockaddr *));
290 u_short ifa_flags; /* mostly rt_flags for cloning */
291 u_int ifa_refcnt; /* count of references */
292 int ifa_metric; /* cost of going out this interface */
294 #define IFA_ROUTE RTF_UP /* route installed */
297 * The prefix structure contains information about one prefix
298 * of an interface. They are maintained by the different address families,
299 * are allocated and attached when an prefix or an address is set,
300 * and are linked together so all prfefixes for an interface can be located.
303 struct sockaddr *ifpr_prefix; /* prefix of interface */
304 struct ifnet *ifpr_ifp; /* back-pointer to interface */
305 struct ifprefix *ifpr_next;
306 u_char ifpr_plen; /* prefix length in bits */
307 u_char ifpr_type; /* protocol dependent prefix type */
311 * Message format for use in obtaining information about interfaces
312 * from sysctl and the routing socket.
315 u_short ifm_msglen; /* to skip over non-understood messages */
316 u_char ifm_version; /* future binary compatability */
317 u_char ifm_type; /* message type */
318 int ifm_addrs; /* like rtm_addrs */
319 int ifm_flags; /* value of if_flags */
320 u_short ifm_index; /* index for associated ifp */
321 struct if_data ifm_data;/* statistics and other data about if */
325 * Message format for use in obtaining information about interface addresses
326 * from sysctl and the routing socket.
329 u_short ifam_msglen; /* to skip over non-understood messages */
330 u_char ifam_version; /* future binary compatability */
331 u_char ifam_type; /* message type */
332 int ifam_addrs; /* like rtm_addrs */
333 int ifam_flags; /* value of ifa_flags */
334 u_short ifam_index; /* index for associated ifp */
335 int ifam_metric; /* value of ifa_metric */
339 * Interface request structure used for socket
340 * ioctl's. All interface ioctl's must have parameter
341 * definitions which begin with ifr_name. The
342 * remainder may be interface specific.
345 #define IFHWADDRLEN 6
346 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
348 struct sockaddr ifru_addr;
349 struct sockaddr ifru_dstaddr;
350 struct sockaddr ifru_broadaddr;
351 struct sockaddr ifru_hwaddr;
356 #define ifr_addr ifr_ifru.ifru_addr /* address */
357 #define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
358 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */
359 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
360 #define ifr_flags ifr_ifru.ifru_flags /* flags */
361 #define ifr_metric ifr_ifru.ifru_metric /* metric */
362 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */
363 #define ifr_data ifr_ifru.ifru_data /* for use by interface */
367 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
368 struct sockaddr ifra_addr;
369 struct sockaddr ifra_dstaddr;
370 #define ifra_broadaddr ifra_dstaddr
371 struct sockaddr ifra_mask;
375 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */
376 int ifm_current; /* current media options */
377 int ifm_mask; /* don't care mask */
378 int ifm_status; /* media status */
379 int ifm_active; /* active options */
380 int ifm_count; /* # entries in ifm_ulist
382 int *ifm_ulist; /* media words */
386 * Structure used in SIOCGIFCONF request.
387 * Used to retrieve interface configuration
388 * for machine (useful for programs which
389 * must know all networks accessible).
392 int ifc_len; /* size of associated buffer */
395 struct ifreq *ifcu_req;
397 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
398 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */
402 * Structure for SIOC[AGD]LIFADDR
405 char iflr_name[IFNAMSIZ];
407 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */
408 unsigned int prefixlen; /* in/out */
409 struct sockaddr_storage addr; /* in/out */
410 struct sockaddr_storage dstaddr; /* out */
413 struct if_nameindex {
414 unsigned int if_index;
420 unsigned int if_nametoindex __P((const char *));
421 char *if_indextoname __P((unsigned int, char *));
422 struct if_nameindex *if_nameindex __P((void));
424 #define if_freenameindex(x) free(x)
427 #include <net/if_arp.h>
430 #define IFAFREE(ifa) { \
431 if ((ifa)->ifa_refcnt <= 0) \
434 (ifa)->ifa_refcnt--; \
437 struct ifnet_head ifnet;
438 struct ifnet **ifindex2ifnet;
444 void ether_ifattach __P((struct ifnet *));
445 void ether_ifdetach __P((struct ifnet *));
446 int ether_ioctl __P((struct ifnet *, struct arpcom *, u_long, caddr_t));
447 void ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
448 int ether_output __P((struct ifnet *,
449 struct mbuf *, struct sockaddr *, struct rtentry *));
450 char *ether_sprintf __P((u_char *));
452 void if_attach __P((struct ifnet *));
453 void if_attachtail __P((struct ifnet *));
454 void if_attachhead __P((struct ifnet *));
455 void if_detach __P((struct ifnet *));
456 void if_down __P((struct ifnet *));
457 void if_qflush __P((struct ifqueue *));
458 void if_slowtimo __P((void *));
459 void if_up __P((struct ifnet *));
460 int ifconf __P((u_long, caddr_t));
461 void ifinit __P((void));
462 int ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
463 int ifpromisc __P((struct ifnet *, int));
464 struct ifnet *ifunit __P((char *));
465 struct ifnet *if_withname __P((struct sockaddr *));
467 struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
468 struct ifaddr *ifa_ifwithaf __P((int));
469 struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
470 struct ifaddr *ifa_ifwithnet __P((struct sockaddr *));
471 struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
473 struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
474 void ifafree __P((struct ifaddr *));
475 void link_rtrequest __P((int, struct rtentry *, struct sockaddr *));
477 int loioctl __P((struct ifnet *, u_long, caddr_t));
478 void loopattach __P((int));
479 int looutput __P((struct ifnet *,
480 struct mbuf *, struct sockaddr *, struct rtentry *));
481 void lortrequest __P((int, struct rtentry *, struct sockaddr *));