1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * From: @(#)if.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: head/sys/net/if_var.h 72200 2001-02-09 06:11:45Z bmilekic $
35 */
36
37#ifndef _NET_IF_VAR_H_
38#define _NET_IF_VAR_H_
39
40/*
41 * Structures defining a network interface, providing a packet
42 * transport mechanism (ala level 0 of the PUP protocols).
43 *
44 * Each interface accepts output datagrams of a specified maximum
45 * length, and provides higher level routines with input datagrams
46 * received from its medium.
47 *
48 * Output occurs when the routine if_output is called, with three parameters:
49 * (*ifp->if_output)(ifp, m, dst, rt)
50 * Here m is the mbuf chain to be sent and dst is the destination address.
51 * The output routine encapsulates the supplied datagram if necessary,
52 * and then transmits it on its medium.
53 *
54 * On input, each interface unwraps the data received by it, and either
55 * places it on the input queue of a internetwork datagram routine
56 * and posts the associated software interrupt, or passes the datagram to a raw
57 * packet input routine.
58 *
59 * Routines exist for locating interfaces by their addresses
60 * or for locating a interface on a certain network, as well as more general
61 * routing and gateway routines maintaining information used to locate
62 * interfaces. These routines live in the files if.c and route.c
63 */
64
65#ifdef __STDC__
66/*
67 * Forward structure declarations for function prototypes [sic].
68 */
69struct mbuf;
70struct proc;
71struct rtentry;
72struct socket;
73struct ether_header;
74#endif
75
76#include <sys/queue.h> /* get TAILQ macros */
77
78#ifdef _KERNEL
79#include <sys/mbuf.h>
80#endif /* _KERNEL */
81#include <sys/mutex.h>
82
83TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
84TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
85TAILQ_HEAD(ifprefixhead, ifprefix);
86TAILQ_HEAD(ifmultihead, ifmultiaddr);
87
88/*
89 * Structure defining a queue for a network interface.
90 */
91struct ifqueue {
92 struct mbuf *ifq_head;
93 struct mbuf *ifq_tail;
94 int ifq_len;
95 int ifq_maxlen;
96 int ifq_drops;
97 struct mtx ifq_mtx;
98};
99
100/*
101 * Structure defining a network interface.
102 *
103 * (Would like to call this struct ``if'', but C isn't PL/1.)
104 */
105struct ifnet {
106 void *if_softc; /* pointer to driver state */
107 char *if_name; /* name, e.g. ``en'' or ``lo'' */
108 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
109 struct ifaddrhead if_addrhead; /* linked list of addresses per if */
110 int if_pcount; /* number of promiscuous listeners */
111 struct bpf_if *if_bpf; /* packet filter structure */
112 u_short if_index; /* numeric abbreviation for this if */
113 short if_unit; /* sub-unit for lower level driver */
114 short if_timer; /* time 'til if_watchdog called */
115 short if_flags; /* up/down, broadcast, etc. */
116 int if_mpsafe; /* XXX TEMPORARY */
117 int if_ipending; /* interrupts pending */
118 void *if_linkmib; /* link-type-specific MIB data */
119 size_t if_linkmiblen; /* length of above data */
120 struct if_data if_data;
121 struct ifmultihead if_multiaddrs; /* multicast addresses configured */
122 int if_amcount; /* number of all-multicast requests */
123/* procedure handles */
124 int (*if_output) /* output routine (enqueue) */
125 __P((struct ifnet *, struct mbuf *, struct sockaddr *,
126 struct rtentry *));
127 void (*if_start) /* initiate output routine */
128 __P((struct ifnet *));
129 int (*if_done) /* output complete routine */
130 __P((struct ifnet *)); /* (XXX not used; fake prototype) */
131 int (*if_ioctl) /* ioctl routine */
132 __P((struct ifnet *, u_long, caddr_t));
133 void (*if_watchdog) /* timer routine */
134 __P((struct ifnet *));
135 int (*if_poll_recv) /* polled receive routine */
136 __P((struct ifnet *, int *));
137 int (*if_poll_xmit) /* polled transmit routine */
138 __P((struct ifnet *, int *));
139 void (*if_poll_intren) /* polled interrupt reenable routine */
140 __P((struct ifnet *));
141 void (*if_poll_slowinput) /* input routine for slow devices */
142 __P((struct ifnet *, struct mbuf *));
143 void (*if_init) /* Init routine */
144 __P((void *));
145 int (*if_resolvemulti) /* validate/resolve multicast */
146 __P((struct ifnet *, struct sockaddr **, struct sockaddr *));
147 struct ifqueue if_snd; /* output queue */
148 struct ifqueue *if_poll_slowq; /* input queue for slow devices */
149 struct ifprefixhead if_prefixhead; /* list of prefixes per if */
150};
151
152typedef void if_init_f_t __P((void *));
153
154#define if_mtu if_data.ifi_mtu
155#define if_type if_data.ifi_type
156#define if_physical if_data.ifi_physical
157#define if_addrlen if_data.ifi_addrlen
158#define if_hdrlen if_data.ifi_hdrlen
159#define if_metric if_data.ifi_metric
160#define if_baudrate if_data.ifi_baudrate
161#define if_hwassist if_data.ifi_hwassist
162#define if_ipackets if_data.ifi_ipackets
163#define if_ierrors if_data.ifi_ierrors
164#define if_opackets if_data.ifi_opackets
165#define if_oerrors if_data.ifi_oerrors
166#define if_collisions if_data.ifi_collisions
167#define if_ibytes if_data.ifi_ibytes
168#define if_obytes if_data.ifi_obytes
169#define if_imcasts if_data.ifi_imcasts
170#define if_omcasts if_data.ifi_omcasts
171#define if_iqdrops if_data.ifi_iqdrops
172#define if_noproto if_data.ifi_noproto
173#define if_lastchange if_data.ifi_lastchange
174#define if_recvquota if_data.ifi_recvquota
175#define if_xmitquota if_data.ifi_xmitquota
176#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0)
177
178/* for compatibility with other BSDs */
179#define if_addrlist if_addrhead
180#define if_list if_link
181
182/*
183 * Bit values in if_ipending
184 */
185#define IFI_RECV 1 /* I want to receive */
186#define IFI_XMIT 2 /* I want to transmit */
187
188/*
189 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
190 * are queues of messages stored on ifqueue structures
191 * (defined above). Entries are added to and deleted from these structures
192 * by these macros, which should be called with ipl raised to splimp().
193 */
194#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx)
195#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx)
196#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
197#define _IF_DROP(ifq) ((ifq)->ifq_drops++)
198#define _IF_QLEN(ifq) ((ifq)->ifq_len)
199
200#define _IF_ENQUEUE(ifq, m) do { \
201 (m)->m_nextpkt = NULL; \
202 if ((ifq)->ifq_tail == NULL) \
203 (ifq)->ifq_head = m; \
204 else \
205 (ifq)->ifq_tail->m_nextpkt = m; \
206 (ifq)->ifq_tail = m; \
207 (ifq)->ifq_len++; \
208} while (0)
209
210#define IF_ENQUEUE(ifq, m) do { \
211 IF_LOCK(ifq); \
212 _IF_ENQUEUE(ifq, m); \
213 IF_UNLOCK(ifq); \
214} while (0)
215
216#define _IF_PREPEND(ifq, m) do { \
217 (m)->m_nextpkt = (ifq)->ifq_head; \
218 if ((ifq)->ifq_tail == NULL) \
219 (ifq)->ifq_tail = (m); \
220 (ifq)->ifq_head = (m); \
221 (ifq)->ifq_len++; \
222} while (0)
223
224#define IF_PREPEND(ifq, m) do { \
225 IF_LOCK(ifq); \
226 _IF_PREPEND(ifq, m); \
227 IF_UNLOCK(ifq); \
228} while (0)
229
230#define _IF_DEQUEUE(ifq, m) do { \
231 (m) = (ifq)->ifq_head; \
232 if (m) { \
233 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
234 (ifq)->ifq_tail = NULL; \
235 (m)->m_nextpkt = NULL; \
236 (ifq)->ifq_len--; \
237 } \
238} while (0)
239
240#define IF_DEQUEUE(ifq, m) do { \
241 IF_LOCK(ifq); \
242 _IF_DEQUEUE(ifq, m); \
243 IF_UNLOCK(ifq); \
244} while (0)
245
246#define IF_DRAIN(ifq) do { \
247 struct mbuf *m; \
248 IF_LOCK(ifq); \
249 for (;;) { \
250 _IF_DEQUEUE(ifq, m); \
251 if (m == NULL) \
252 break; \
253 m_freem(m); \
254 } \
255 IF_UNLOCK(ifq); \
256} while (0)
257
258#ifdef _KERNEL
259#define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0)
260#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj)
261
262static __inline int
263if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
264{
265 int active = 0;
266
267 IF_LOCK(ifq);
268 if (_IF_QFULL(ifq)) {
269 _IF_DROP(ifq);
270 IF_UNLOCK(ifq);
271 m_freem(m);
272 return (0);
273 }
274 if (ifp != NULL) {
275 ifp->if_obytes += m->m_pkthdr.len + adjust;
276 if (m->m_flags & M_MCAST)
277 ifp->if_omcasts++;
278 active = ifp->if_flags & IFF_OACTIVE;
279 }
280 _IF_ENQUEUE(ifq, m);
281 IF_UNLOCK(ifq);
282 if (ifp != NULL && !active) {
283 if (ifp->if_mpsafe) {
284 DROP_GIANT_NOSWITCH();
285 (*ifp->if_start)(ifp);
286 PICKUP_GIANT();
287 } else {
288 (*ifp->if_start)(ifp);
289 }
290 }
291 return (1);
292}
293
294/*
295 * 72 was chosen below because it is the size of a TCP/IP
296 * header (40) + the minimum mss (32).
297 */
298#define IF_MINMTU 72
299#define IF_MAXMTU 65535
300
301#endif /* _KERNEL */
302
303/*
304 * The ifaddr structure contains information about one address
305 * of an interface. They are maintained by the different address families,
306 * are allocated and attached when an address is set, and are linked
307 * together so all addresses for an interface can be located.
308 */
309struct ifaddr {
310 struct sockaddr *ifa_addr; /* address of interface */
311 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
312#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
313 struct sockaddr *ifa_netmask; /* used to determine subnet */
314 struct if_data if_data; /* not all members are meaningful */
315 struct ifnet *ifa_ifp; /* back-pointer to interface */
316 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */
317 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
318 __P((int, struct rtentry *, struct sockaddr *));
319 u_short ifa_flags; /* mostly rt_flags for cloning */
320 u_int ifa_refcnt; /* references to this structure */
321 int ifa_metric; /* cost of going out this interface */
322#ifdef notdef
323 struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */
324#endif
325 int (*ifa_claim_addr) /* check if an addr goes to this if */
326 __P((struct ifaddr *, struct sockaddr *));
327
328};
329#define IFA_ROUTE RTF_UP /* route installed */
330
331/* for compatibility with other BSDs */
332#define ifa_list ifa_link
333
334/*
335 * The prefix structure contains information about one prefix
336 * of an interface. They are maintained by the different address families,
337 * are allocated and attached when an prefix or an address is set,
338 * and are linked together so all prefixes for an interface can be located.
339 */
340struct ifprefix {
341 struct sockaddr *ifpr_prefix; /* prefix of interface */
342 struct ifnet *ifpr_ifp; /* back-pointer to interface */
343 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */
344 u_char ifpr_plen; /* prefix length in bits */
345 u_char ifpr_type; /* protocol dependent prefix type */
346};
347
348/*
349 * Multicast address structure. This is analogous to the ifaddr
350 * structure except that it keeps track of multicast addresses.
351 * Also, the reference count here is a count of requests for this
352 * address, not a count of pointers to this structure.
353 */
354struct ifmultiaddr {
355 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
356 struct sockaddr *ifma_addr; /* address this membership is for */
357 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
358 struct ifnet *ifma_ifp; /* back-pointer to interface */
359 u_int ifma_refcount; /* reference count */
360 void *ifma_protospec; /* protocol-specific state, if any */
361};
362
363#ifdef _KERNEL
364#define IFAFREE(ifa) \
365 do { \
366 if ((ifa)->ifa_refcnt <= 0) \
367 ifafree(ifa); \
368 else \
369 (ifa)->ifa_refcnt--; \
370 } while (0)
371
372extern struct ifnethead ifnet;
373extern struct ifnet **ifindex2ifnet;
374extern int ifqmaxlen;
375extern struct ifnet *loif; /* first loopback interface */
376extern int if_index;
377extern struct ifaddr **ifnet_addrs;
378
379void ether_ifattach __P((struct ifnet *, int));
380void ether_ifdetach __P((struct ifnet *, int));
381void ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
382void ether_demux __P((struct ifnet *, struct ether_header *, struct mbuf *));
383int ether_output __P((struct ifnet *,
384 struct mbuf *, struct sockaddr *, struct rtentry *));
385int ether_output_frame __P((struct ifnet *, struct mbuf *));
386int ether_ioctl __P((struct ifnet *, int, caddr_t));
387
388int if_addmulti __P((struct ifnet *, struct sockaddr *,
389 struct ifmultiaddr **));
390int if_allmulti __P((struct ifnet *, int));
391void if_attach __P((struct ifnet *));
392int if_delmulti __P((struct ifnet *, struct sockaddr *));
393void if_detach __P((struct ifnet *));
394void if_down __P((struct ifnet *));
395void if_route __P((struct ifnet *, int flag, int fam));
396int if_setlladdr __P((struct ifnet *, const u_char *, int));
397void if_unroute __P((struct ifnet *, int flag, int fam));
398void if_up __P((struct ifnet *));
399/*void ifinit __P((void));*/ /* declared in systm.h for main() */
400int ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
401int ifpromisc __P((struct ifnet *, int));
402struct ifnet *ifunit __P((char *));
403struct ifnet *if_withname __P((struct sockaddr *));
404
405int if_poll_recv_slow __P((struct ifnet *ifp, int *quotap));
406void if_poll_xmit_slow __P((struct ifnet *ifp, int *quotap));
407void if_poll_throttle __P((void));
408void if_poll_unthrottle __P((void *));
409void if_poll_init __P((void));
410void if_poll __P((void));
411
412struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
413struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
414struct ifaddr *ifa_ifwithnet __P((struct sockaddr *));
415struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
416 struct sockaddr *));
417struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
418void ifafree __P((struct ifaddr *));
419
420struct ifmultiaddr *ifmaof_ifpforaddr __P((struct sockaddr *,
421 struct ifnet *));
422int if_simloop __P((struct ifnet *ifp, struct mbuf *m, int af, int hlen));
423
424#endif /* _KERNEL */
425
426#endif /* !_NET_IF_VAR_H_ */
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * From: @(#)if.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: head/sys/net/if_var.h 72200 2001-02-09 06:11:45Z bmilekic $
35 */
36
37#ifndef _NET_IF_VAR_H_
38#define _NET_IF_VAR_H_
39
40/*
41 * Structures defining a network interface, providing a packet
42 * transport mechanism (ala level 0 of the PUP protocols).
43 *
44 * Each interface accepts output datagrams of a specified maximum
45 * length, and provides higher level routines with input datagrams
46 * received from its medium.
47 *
48 * Output occurs when the routine if_output is called, with three parameters:
49 * (*ifp->if_output)(ifp, m, dst, rt)
50 * Here m is the mbuf chain to be sent and dst is the destination address.
51 * The output routine encapsulates the supplied datagram if necessary,
52 * and then transmits it on its medium.
53 *
54 * On input, each interface unwraps the data received by it, and either
55 * places it on the input queue of a internetwork datagram routine
56 * and posts the associated software interrupt, or passes the datagram to a raw
57 * packet input routine.
58 *
59 * Routines exist for locating interfaces by their addresses
60 * or for locating a interface on a certain network, as well as more general
61 * routing and gateway routines maintaining information used to locate
62 * interfaces. These routines live in the files if.c and route.c
63 */
64
65#ifdef __STDC__
66/*
67 * Forward structure declarations for function prototypes [sic].
68 */
69struct mbuf;
70struct proc;
71struct rtentry;
72struct socket;
73struct ether_header;
74#endif
75
76#include <sys/queue.h> /* get TAILQ macros */
77
78#ifdef _KERNEL
79#include <sys/mbuf.h>
80#endif /* _KERNEL */
81#include <sys/mutex.h>
82
83TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
84TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
85TAILQ_HEAD(ifprefixhead, ifprefix);
86TAILQ_HEAD(ifmultihead, ifmultiaddr);
87
88/*
89 * Structure defining a queue for a network interface.
90 */
91struct ifqueue {
92 struct mbuf *ifq_head;
93 struct mbuf *ifq_tail;
94 int ifq_len;
95 int ifq_maxlen;
96 int ifq_drops;
97 struct mtx ifq_mtx;
98};
99
100/*
101 * Structure defining a network interface.
102 *
103 * (Would like to call this struct ``if'', but C isn't PL/1.)
104 */
105struct ifnet {
106 void *if_softc; /* pointer to driver state */
107 char *if_name; /* name, e.g. ``en'' or ``lo'' */
108 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
109 struct ifaddrhead if_addrhead; /* linked list of addresses per if */
110 int if_pcount; /* number of promiscuous listeners */
111 struct bpf_if *if_bpf; /* packet filter structure */
112 u_short if_index; /* numeric abbreviation for this if */
113 short if_unit; /* sub-unit for lower level driver */
114 short if_timer; /* time 'til if_watchdog called */
115 short if_flags; /* up/down, broadcast, etc. */
116 int if_mpsafe; /* XXX TEMPORARY */
117 int if_ipending; /* interrupts pending */
118 void *if_linkmib; /* link-type-specific MIB data */
119 size_t if_linkmiblen; /* length of above data */
120 struct if_data if_data;
121 struct ifmultihead if_multiaddrs; /* multicast addresses configured */
122 int if_amcount; /* number of all-multicast requests */
123/* procedure handles */
124 int (*if_output) /* output routine (enqueue) */
125 __P((struct ifnet *, struct mbuf *, struct sockaddr *,
126 struct rtentry *));
127 void (*if_start) /* initiate output routine */
128 __P((struct ifnet *));
129 int (*if_done) /* output complete routine */
130 __P((struct ifnet *)); /* (XXX not used; fake prototype) */
131 int (*if_ioctl) /* ioctl routine */
132 __P((struct ifnet *, u_long, caddr_t));
133 void (*if_watchdog) /* timer routine */
134 __P((struct ifnet *));
135 int (*if_poll_recv) /* polled receive routine */
136 __P((struct ifnet *, int *));
137 int (*if_poll_xmit) /* polled transmit routine */
138 __P((struct ifnet *, int *));
139 void (*if_poll_intren) /* polled interrupt reenable routine */
140 __P((struct ifnet *));
141 void (*if_poll_slowinput) /* input routine for slow devices */
142 __P((struct ifnet *, struct mbuf *));
143 void (*if_init) /* Init routine */
144 __P((void *));
145 int (*if_resolvemulti) /* validate/resolve multicast */
146 __P((struct ifnet *, struct sockaddr **, struct sockaddr *));
147 struct ifqueue if_snd; /* output queue */
148 struct ifqueue *if_poll_slowq; /* input queue for slow devices */
149 struct ifprefixhead if_prefixhead; /* list of prefixes per if */
150};
151
152typedef void if_init_f_t __P((void *));
153
154#define if_mtu if_data.ifi_mtu
155#define if_type if_data.ifi_type
156#define if_physical if_data.ifi_physical
157#define if_addrlen if_data.ifi_addrlen
158#define if_hdrlen if_data.ifi_hdrlen
159#define if_metric if_data.ifi_metric
160#define if_baudrate if_data.ifi_baudrate
161#define if_hwassist if_data.ifi_hwassist
162#define if_ipackets if_data.ifi_ipackets
163#define if_ierrors if_data.ifi_ierrors
164#define if_opackets if_data.ifi_opackets
165#define if_oerrors if_data.ifi_oerrors
166#define if_collisions if_data.ifi_collisions
167#define if_ibytes if_data.ifi_ibytes
168#define if_obytes if_data.ifi_obytes
169#define if_imcasts if_data.ifi_imcasts
170#define if_omcasts if_data.ifi_omcasts
171#define if_iqdrops if_data.ifi_iqdrops
172#define if_noproto if_data.ifi_noproto
173#define if_lastchange if_data.ifi_lastchange
174#define if_recvquota if_data.ifi_recvquota
175#define if_xmitquota if_data.ifi_xmitquota
176#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0)
177
178/* for compatibility with other BSDs */
179#define if_addrlist if_addrhead
180#define if_list if_link
181
182/*
183 * Bit values in if_ipending
184 */
185#define IFI_RECV 1 /* I want to receive */
186#define IFI_XMIT 2 /* I want to transmit */
187
188/*
189 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
190 * are queues of messages stored on ifqueue structures
191 * (defined above). Entries are added to and deleted from these structures
192 * by these macros, which should be called with ipl raised to splimp().
193 */
194#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx)
195#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx)
196#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
197#define _IF_DROP(ifq) ((ifq)->ifq_drops++)
198#define _IF_QLEN(ifq) ((ifq)->ifq_len)
199
200#define _IF_ENQUEUE(ifq, m) do { \
201 (m)->m_nextpkt = NULL; \
202 if ((ifq)->ifq_tail == NULL) \
203 (ifq)->ifq_head = m; \
204 else \
205 (ifq)->ifq_tail->m_nextpkt = m; \
206 (ifq)->ifq_tail = m; \
207 (ifq)->ifq_len++; \
208} while (0)
209
210#define IF_ENQUEUE(ifq, m) do { \
211 IF_LOCK(ifq); \
212 _IF_ENQUEUE(ifq, m); \
213 IF_UNLOCK(ifq); \
214} while (0)
215
216#define _IF_PREPEND(ifq, m) do { \
217 (m)->m_nextpkt = (ifq)->ifq_head; \
218 if ((ifq)->ifq_tail == NULL) \
219 (ifq)->ifq_tail = (m); \
220 (ifq)->ifq_head = (m); \
221 (ifq)->ifq_len++; \
222} while (0)
223
224#define IF_PREPEND(ifq, m) do { \
225 IF_LOCK(ifq); \
226 _IF_PREPEND(ifq, m); \
227 IF_UNLOCK(ifq); \
228} while (0)
229
230#define _IF_DEQUEUE(ifq, m) do { \
231 (m) = (ifq)->ifq_head; \
232 if (m) { \
233 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
234 (ifq)->ifq_tail = NULL; \
235 (m)->m_nextpkt = NULL; \
236 (ifq)->ifq_len--; \
237 } \
238} while (0)
239
240#define IF_DEQUEUE(ifq, m) do { \
241 IF_LOCK(ifq); \
242 _IF_DEQUEUE(ifq, m); \
243 IF_UNLOCK(ifq); \
244} while (0)
245
246#define IF_DRAIN(ifq) do { \
247 struct mbuf *m; \
248 IF_LOCK(ifq); \
249 for (;;) { \
250 _IF_DEQUEUE(ifq, m); \
251 if (m == NULL) \
252 break; \
253 m_freem(m); \
254 } \
255 IF_UNLOCK(ifq); \
256} while (0)
257
258#ifdef _KERNEL
259#define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0)
260#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj)
261
262static __inline int
263if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
264{
265 int active = 0;
266
267 IF_LOCK(ifq);
268 if (_IF_QFULL(ifq)) {
269 _IF_DROP(ifq);
270 IF_UNLOCK(ifq);
271 m_freem(m);
272 return (0);
273 }
274 if (ifp != NULL) {
275 ifp->if_obytes += m->m_pkthdr.len + adjust;
276 if (m->m_flags & M_MCAST)
277 ifp->if_omcasts++;
278 active = ifp->if_flags & IFF_OACTIVE;
279 }
280 _IF_ENQUEUE(ifq, m);
281 IF_UNLOCK(ifq);
282 if (ifp != NULL && !active) {
283 if (ifp->if_mpsafe) {
284 DROP_GIANT_NOSWITCH();
285 (*ifp->if_start)(ifp);
286 PICKUP_GIANT();
287 } else {
288 (*ifp->if_start)(ifp);
289 }
290 }
291 return (1);
292}
293
294/*
295 * 72 was chosen below because it is the size of a TCP/IP
296 * header (40) + the minimum mss (32).
297 */
298#define IF_MINMTU 72
299#define IF_MAXMTU 65535
300
301#endif /* _KERNEL */
302
303/*
304 * The ifaddr structure contains information about one address
305 * of an interface. They are maintained by the different address families,
306 * are allocated and attached when an address is set, and are linked
307 * together so all addresses for an interface can be located.
308 */
309struct ifaddr {
310 struct sockaddr *ifa_addr; /* address of interface */
311 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
312#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
313 struct sockaddr *ifa_netmask; /* used to determine subnet */
314 struct if_data if_data; /* not all members are meaningful */
315 struct ifnet *ifa_ifp; /* back-pointer to interface */
316 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */
317 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
318 __P((int, struct rtentry *, struct sockaddr *));
319 u_short ifa_flags; /* mostly rt_flags for cloning */
320 u_int ifa_refcnt; /* references to this structure */
321 int ifa_metric; /* cost of going out this interface */
322#ifdef notdef
323 struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */
324#endif
325 int (*ifa_claim_addr) /* check if an addr goes to this if */
326 __P((struct ifaddr *, struct sockaddr *));
327
328};
329#define IFA_ROUTE RTF_UP /* route installed */
330
331/* for compatibility with other BSDs */
332#define ifa_list ifa_link
333
334/*
335 * The prefix structure contains information about one prefix
336 * of an interface. They are maintained by the different address families,
337 * are allocated and attached when an prefix or an address is set,
338 * and are linked together so all prefixes for an interface can be located.
339 */
340struct ifprefix {
341 struct sockaddr *ifpr_prefix; /* prefix of interface */
342 struct ifnet *ifpr_ifp; /* back-pointer to interface */
343 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */
344 u_char ifpr_plen; /* prefix length in bits */
345 u_char ifpr_type; /* protocol dependent prefix type */
346};
347
348/*
349 * Multicast address structure. This is analogous to the ifaddr
350 * structure except that it keeps track of multicast addresses.
351 * Also, the reference count here is a count of requests for this
352 * address, not a count of pointers to this structure.
353 */
354struct ifmultiaddr {
355 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
356 struct sockaddr *ifma_addr; /* address this membership is for */
357 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
358 struct ifnet *ifma_ifp; /* back-pointer to interface */
359 u_int ifma_refcount; /* reference count */
360 void *ifma_protospec; /* protocol-specific state, if any */
361};
362
363#ifdef _KERNEL
364#define IFAFREE(ifa) \
365 do { \
366 if ((ifa)->ifa_refcnt <= 0) \
367 ifafree(ifa); \
368 else \
369 (ifa)->ifa_refcnt--; \
370 } while (0)
371
372extern struct ifnethead ifnet;
373extern struct ifnet **ifindex2ifnet;
374extern int ifqmaxlen;
375extern struct ifnet *loif; /* first loopback interface */
376extern int if_index;
377extern struct ifaddr **ifnet_addrs;
378
379void ether_ifattach __P((struct ifnet *, int));
380void ether_ifdetach __P((struct ifnet *, int));
381void ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
382void ether_demux __P((struct ifnet *, struct ether_header *, struct mbuf *));
383int ether_output __P((struct ifnet *,
384 struct mbuf *, struct sockaddr *, struct rtentry *));
385int ether_output_frame __P((struct ifnet *, struct mbuf *));
386int ether_ioctl __P((struct ifnet *, int, caddr_t));
387
388int if_addmulti __P((struct ifnet *, struct sockaddr *,
389 struct ifmultiaddr **));
390int if_allmulti __P((struct ifnet *, int));
391void if_attach __P((struct ifnet *));
392int if_delmulti __P((struct ifnet *, struct sockaddr *));
393void if_detach __P((struct ifnet *));
394void if_down __P((struct ifnet *));
395void if_route __P((struct ifnet *, int flag, int fam));
396int if_setlladdr __P((struct ifnet *, const u_char *, int));
397void if_unroute __P((struct ifnet *, int flag, int fam));
398void if_up __P((struct ifnet *));
399/*void ifinit __P((void));*/ /* declared in systm.h for main() */
400int ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
401int ifpromisc __P((struct ifnet *, int));
402struct ifnet *ifunit __P((char *));
403struct ifnet *if_withname __P((struct sockaddr *));
404
405int if_poll_recv_slow __P((struct ifnet *ifp, int *quotap));
406void if_poll_xmit_slow __P((struct ifnet *ifp, int *quotap));
407void if_poll_throttle __P((void));
408void if_poll_unthrottle __P((void *));
409void if_poll_init __P((void));
410void if_poll __P((void));
411
412struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
413struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
414struct ifaddr *ifa_ifwithnet __P((struct sockaddr *));
415struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
416 struct sockaddr *));
417struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
418void ifafree __P((struct ifaddr *));
419
420struct ifmultiaddr *ifmaof_ifpforaddr __P((struct sockaddr *,
421 struct ifnet *));
422int if_simloop __P((struct ifnet *ifp, struct mbuf *m, int af, int hlen));
423
424#endif /* _KERNEL */
425
426#endif /* !_NET_IF_VAR_H_ */