31 */
32
33#ifndef _NET_IF_VAR_H_
34#define _NET_IF_VAR_H_
35
36/*
37 * Structures defining a network interface, providing a packet
38 * transport mechanism (ala level 0 of the PUP protocols).
39 *
40 * Each interface accepts output datagrams of a specified maximum
41 * length, and provides higher level routines with input datagrams
42 * received from its medium.
43 *
44 * Output occurs when the routine if_output is called, with three parameters:
45 * (*ifp->if_output)(ifp, m, dst, rt)
46 * Here m is the mbuf chain to be sent and dst is the destination address.
47 * The output routine encapsulates the supplied datagram if necessary,
48 * and then transmits it on its medium.
49 *
50 * On input, each interface unwraps the data received by it, and either
51 * places it on the input queue of an internetwork datagram routine
52 * and posts the associated software interrupt, or passes the datagram to a raw
53 * packet input routine.
54 *
55 * Routines exist for locating interfaces by their addresses
56 * or for locating an interface on a certain network, as well as more general
57 * routing and gateway routines maintaining information used to locate
58 * interfaces. These routines live in the files if.c and route.c
59 */
60
61#ifdef __STDC__
62/*
63 * Forward structure declarations for function prototypes [sic].
64 */
65struct mbuf;
66struct thread;
67struct rtentry;
68struct rt_addrinfo;
69struct socket;
70struct ether_header;
71struct carp_if;
72struct carp_softc;
73struct ifvlantrunk;
74struct route;
75struct vnet;
76#endif
77
78#include <sys/queue.h> /* get TAILQ macros */
79
80#ifdef _KERNEL
81#include <sys/mbuf.h>
82#include <sys/eventhandler.h>
83#include <sys/buf_ring.h>
84#include <net/vnet.h>
85#endif /* _KERNEL */
86#include <sys/lock.h> /* XXX */
87#include <sys/mutex.h> /* XXX */
88#include <sys/rwlock.h> /* XXX */
89#include <sys/sx.h> /* XXX */
90#include <sys/event.h> /* XXX */
91#include <sys/_task.h>
92
93#define IF_DUNIT_NONE -1
94
95#include <altq/if_altq.h>
96
97TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
98TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
99TAILQ_HEAD(ifmultihead, ifmultiaddr);
100TAILQ_HEAD(ifgrouphead, ifg_group);
101
102#ifdef _KERNEL
103VNET_DECLARE(struct pfil_head, link_pfil_hook); /* packet filter hooks */
104#define V_link_pfil_hook VNET(link_pfil_hook)
105#endif /* _KERNEL */
106
107/*
108 * Structure defining a queue for a network interface.
109 */
110struct ifqueue {
111 struct mbuf *ifq_head;
112 struct mbuf *ifq_tail;
113 int ifq_len;
114 int ifq_maxlen;
115 int ifq_drops;
116 struct mtx ifq_mtx;
117};
118
119/*
120 * Structure defining a network interface.
121 *
122 * (Would like to call this struct ``if'', but C isn't PL/1.)
123 */
124
125struct ifnet {
126 void *if_softc; /* pointer to driver state */
127 void *if_l2com; /* pointer to protocol bits */
128 struct vnet *if_vnet; /* pointer to network stack instance */
129 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
130 char if_xname[IFNAMSIZ]; /* external name (name + unit) */
131 const char *if_dname; /* driver name */
132 int if_dunit; /* unit or IF_DUNIT_NONE */
133 u_int if_refcount; /* reference count */
134 struct ifaddrhead if_addrhead; /* linked list of addresses per if */
135 /*
136 * if_addrhead is the list of all addresses associated to
137 * an interface.
138 * Some code in the kernel assumes that first element
139 * of the list has type AF_LINK, and contains sockaddr_dl
140 * addresses which store the link-level address and the name
141 * of the interface.
142 * However, access to the AF_LINK address through this
143 * field is deprecated. Use if_addr or ifaddr_byindex() instead.
144 */
145 int if_pcount; /* number of promiscuous listeners */
146 struct carp_if *if_carp; /* carp interface structure */
147 struct bpf_if *if_bpf; /* packet filter structure */
148 u_short if_index; /* numeric abbreviation for this if */
149 short if_index_reserved; /* spare space to grow if_index */
150 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
151 int if_flags; /* up/down, broadcast, etc. */
152 int if_capabilities; /* interface features & capabilities */
153 int if_capenable; /* enabled features & capabilities */
154 void *if_linkmib; /* link-type-specific MIB data */
155 size_t if_linkmiblen; /* length of above data */
156 struct if_data if_data;
157 struct ifmultihead if_multiaddrs; /* multicast addresses configured */
158 int if_amcount; /* number of all-multicast requests */
159/* procedure handles */
160 int (*if_output) /* output routine (enqueue) */
161 (struct ifnet *, struct mbuf *, struct sockaddr *,
162 struct route *);
163 void (*if_input) /* input routine (from h/w driver) */
164 (struct ifnet *, struct mbuf *);
165 void (*if_start) /* initiate output routine */
166 (struct ifnet *);
167 int (*if_ioctl) /* ioctl routine */
168 (struct ifnet *, u_long, caddr_t);
169 void (*if_init) /* Init routine */
170 (void *);
171 int (*if_resolvemulti) /* validate/resolve multicast */
172 (struct ifnet *, struct sockaddr **, struct sockaddr *);
173 void (*if_qflush) /* flush any queues */
174 (struct ifnet *);
175 int (*if_transmit) /* initiate output routine */
176 (struct ifnet *, struct mbuf *);
177 void (*if_reassign) /* reassign to vnet routine */
178 (struct ifnet *, struct vnet *, char *);
179 struct vnet *if_home_vnet; /* where this ifnet originates from */
180 struct ifaddr *if_addr; /* pointer to link-level address */
181 void *if_llsoftc; /* link layer softc */
182 int if_drv_flags; /* driver-managed status flags */
183 struct ifaltq if_snd; /* output queue (includes altq) */
184 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
185
186 void *if_bridge; /* bridge glue */
187
188 struct label *if_label; /* interface MAC label */
189
190 /* these are only used by IPv6 */
191 void *if_unused[2];
192 void *if_afdata[AF_MAX];
193 int if_afdata_initialized;
194 struct rwlock if_afdata_lock;
195 struct task if_linktask; /* task for link change events */
196 struct rwlock if_addr_lock; /* lock to protect address lists */
197
198 LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */
199 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
200 /* protected by if_addr_lock */
201 void *if_pf_kif;
202 void *if_lagg; /* lagg glue */
203 char *if_description; /* interface description */
204 u_int if_fib; /* interface FIB */
205 u_char if_alloctype; /* if_type at time of allocation */
206
207 /*
208 * Spare fields are added so that we can modify sensitive data
209 * structures without changing the kernel binary interface, and must
210 * be used with care where binary compatibility is required.
211 */
212 char if_cspare[3];
213 int if_ispare[4];
214 void *if_pspare[8]; /* 1 netmap, 7 TDB */
215};
216
217typedef void if_init_f_t(void *);
218
219/*
220 * XXX These aliases are terribly dangerous because they could apply
221 * to anything.
222 */
223#define if_mtu if_data.ifi_mtu
224#define if_type if_data.ifi_type
225#define if_physical if_data.ifi_physical
226#define if_addrlen if_data.ifi_addrlen
227#define if_hdrlen if_data.ifi_hdrlen
228#define if_metric if_data.ifi_metric
229#define if_link_state if_data.ifi_link_state
230#define if_baudrate if_data.ifi_baudrate
231#define if_baudrate_pf if_data.ifi_baudrate_pf
232#define if_hwassist if_data.ifi_hwassist
233#define if_ipackets if_data.ifi_ipackets
234#define if_ierrors if_data.ifi_ierrors
235#define if_opackets if_data.ifi_opackets
236#define if_oerrors if_data.ifi_oerrors
237#define if_collisions if_data.ifi_collisions
238#define if_ibytes if_data.ifi_ibytes
239#define if_obytes if_data.ifi_obytes
240#define if_imcasts if_data.ifi_imcasts
241#define if_omcasts if_data.ifi_omcasts
242#define if_iqdrops if_data.ifi_iqdrops
243#define if_noproto if_data.ifi_noproto
244#define if_lastchange if_data.ifi_lastchange
245
246/* for compatibility with other BSDs */
247#define if_addrlist if_addrhead
248#define if_list if_link
249#define if_name(ifp) ((ifp)->if_xname)
250
251/*
252 * Locks for address lists on the network interface.
253 */
254#define IF_ADDR_LOCK_INIT(if) rw_init(&(if)->if_addr_lock, "if_addr_lock")
255#define IF_ADDR_LOCK_DESTROY(if) rw_destroy(&(if)->if_addr_lock)
256#define IF_ADDR_WLOCK(if) rw_wlock(&(if)->if_addr_lock)
257#define IF_ADDR_WUNLOCK(if) rw_wunlock(&(if)->if_addr_lock)
258#define IF_ADDR_RLOCK(if) rw_rlock(&(if)->if_addr_lock)
259#define IF_ADDR_RUNLOCK(if) rw_runlock(&(if)->if_addr_lock)
260#define IF_ADDR_LOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_LOCKED)
261#define IF_ADDR_WLOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_WLOCKED)
262
263/*
264 * Function variations on locking macros intended to be used by loadable
265 * kernel modules in order to divorce them from the internals of address list
266 * locking.
267 */
268void if_addr_rlock(struct ifnet *ifp); /* if_addrhead */
269void if_addr_runlock(struct ifnet *ifp); /* if_addrhead */
270void if_maddr_rlock(struct ifnet *ifp); /* if_multiaddrs */
271void if_maddr_runlock(struct ifnet *ifp); /* if_multiaddrs */
272
273/*
274 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
275 * are queues of messages stored on ifqueue structures
276 * (defined above). Entries are added to and deleted from these structures
| 31 */
32
33#ifndef _NET_IF_VAR_H_
34#define _NET_IF_VAR_H_
35
36/*
37 * Structures defining a network interface, providing a packet
38 * transport mechanism (ala level 0 of the PUP protocols).
39 *
40 * Each interface accepts output datagrams of a specified maximum
41 * length, and provides higher level routines with input datagrams
42 * received from its medium.
43 *
44 * Output occurs when the routine if_output is called, with three parameters:
45 * (*ifp->if_output)(ifp, m, dst, rt)
46 * Here m is the mbuf chain to be sent and dst is the destination address.
47 * The output routine encapsulates the supplied datagram if necessary,
48 * and then transmits it on its medium.
49 *
50 * On input, each interface unwraps the data received by it, and either
51 * places it on the input queue of an internetwork datagram routine
52 * and posts the associated software interrupt, or passes the datagram to a raw
53 * packet input routine.
54 *
55 * Routines exist for locating interfaces by their addresses
56 * or for locating an interface on a certain network, as well as more general
57 * routing and gateway routines maintaining information used to locate
58 * interfaces. These routines live in the files if.c and route.c
59 */
60
61#ifdef __STDC__
62/*
63 * Forward structure declarations for function prototypes [sic].
64 */
65struct mbuf;
66struct thread;
67struct rtentry;
68struct rt_addrinfo;
69struct socket;
70struct ether_header;
71struct carp_if;
72struct carp_softc;
73struct ifvlantrunk;
74struct route;
75struct vnet;
76#endif
77
78#include <sys/queue.h> /* get TAILQ macros */
79
80#ifdef _KERNEL
81#include <sys/mbuf.h>
82#include <sys/eventhandler.h>
83#include <sys/buf_ring.h>
84#include <net/vnet.h>
85#endif /* _KERNEL */
86#include <sys/lock.h> /* XXX */
87#include <sys/mutex.h> /* XXX */
88#include <sys/rwlock.h> /* XXX */
89#include <sys/sx.h> /* XXX */
90#include <sys/event.h> /* XXX */
91#include <sys/_task.h>
92
93#define IF_DUNIT_NONE -1
94
95#include <altq/if_altq.h>
96
97TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
98TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
99TAILQ_HEAD(ifmultihead, ifmultiaddr);
100TAILQ_HEAD(ifgrouphead, ifg_group);
101
102#ifdef _KERNEL
103VNET_DECLARE(struct pfil_head, link_pfil_hook); /* packet filter hooks */
104#define V_link_pfil_hook VNET(link_pfil_hook)
105#endif /* _KERNEL */
106
107/*
108 * Structure defining a queue for a network interface.
109 */
110struct ifqueue {
111 struct mbuf *ifq_head;
112 struct mbuf *ifq_tail;
113 int ifq_len;
114 int ifq_maxlen;
115 int ifq_drops;
116 struct mtx ifq_mtx;
117};
118
119/*
120 * Structure defining a network interface.
121 *
122 * (Would like to call this struct ``if'', but C isn't PL/1.)
123 */
124
125struct ifnet {
126 void *if_softc; /* pointer to driver state */
127 void *if_l2com; /* pointer to protocol bits */
128 struct vnet *if_vnet; /* pointer to network stack instance */
129 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
130 char if_xname[IFNAMSIZ]; /* external name (name + unit) */
131 const char *if_dname; /* driver name */
132 int if_dunit; /* unit or IF_DUNIT_NONE */
133 u_int if_refcount; /* reference count */
134 struct ifaddrhead if_addrhead; /* linked list of addresses per if */
135 /*
136 * if_addrhead is the list of all addresses associated to
137 * an interface.
138 * Some code in the kernel assumes that first element
139 * of the list has type AF_LINK, and contains sockaddr_dl
140 * addresses which store the link-level address and the name
141 * of the interface.
142 * However, access to the AF_LINK address through this
143 * field is deprecated. Use if_addr or ifaddr_byindex() instead.
144 */
145 int if_pcount; /* number of promiscuous listeners */
146 struct carp_if *if_carp; /* carp interface structure */
147 struct bpf_if *if_bpf; /* packet filter structure */
148 u_short if_index; /* numeric abbreviation for this if */
149 short if_index_reserved; /* spare space to grow if_index */
150 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
151 int if_flags; /* up/down, broadcast, etc. */
152 int if_capabilities; /* interface features & capabilities */
153 int if_capenable; /* enabled features & capabilities */
154 void *if_linkmib; /* link-type-specific MIB data */
155 size_t if_linkmiblen; /* length of above data */
156 struct if_data if_data;
157 struct ifmultihead if_multiaddrs; /* multicast addresses configured */
158 int if_amcount; /* number of all-multicast requests */
159/* procedure handles */
160 int (*if_output) /* output routine (enqueue) */
161 (struct ifnet *, struct mbuf *, struct sockaddr *,
162 struct route *);
163 void (*if_input) /* input routine (from h/w driver) */
164 (struct ifnet *, struct mbuf *);
165 void (*if_start) /* initiate output routine */
166 (struct ifnet *);
167 int (*if_ioctl) /* ioctl routine */
168 (struct ifnet *, u_long, caddr_t);
169 void (*if_init) /* Init routine */
170 (void *);
171 int (*if_resolvemulti) /* validate/resolve multicast */
172 (struct ifnet *, struct sockaddr **, struct sockaddr *);
173 void (*if_qflush) /* flush any queues */
174 (struct ifnet *);
175 int (*if_transmit) /* initiate output routine */
176 (struct ifnet *, struct mbuf *);
177 void (*if_reassign) /* reassign to vnet routine */
178 (struct ifnet *, struct vnet *, char *);
179 struct vnet *if_home_vnet; /* where this ifnet originates from */
180 struct ifaddr *if_addr; /* pointer to link-level address */
181 void *if_llsoftc; /* link layer softc */
182 int if_drv_flags; /* driver-managed status flags */
183 struct ifaltq if_snd; /* output queue (includes altq) */
184 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
185
186 void *if_bridge; /* bridge glue */
187
188 struct label *if_label; /* interface MAC label */
189
190 /* these are only used by IPv6 */
191 void *if_unused[2];
192 void *if_afdata[AF_MAX];
193 int if_afdata_initialized;
194 struct rwlock if_afdata_lock;
195 struct task if_linktask; /* task for link change events */
196 struct rwlock if_addr_lock; /* lock to protect address lists */
197
198 LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */
199 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
200 /* protected by if_addr_lock */
201 void *if_pf_kif;
202 void *if_lagg; /* lagg glue */
203 char *if_description; /* interface description */
204 u_int if_fib; /* interface FIB */
205 u_char if_alloctype; /* if_type at time of allocation */
206
207 /*
208 * Spare fields are added so that we can modify sensitive data
209 * structures without changing the kernel binary interface, and must
210 * be used with care where binary compatibility is required.
211 */
212 char if_cspare[3];
213 int if_ispare[4];
214 void *if_pspare[8]; /* 1 netmap, 7 TDB */
215};
216
217typedef void if_init_f_t(void *);
218
219/*
220 * XXX These aliases are terribly dangerous because they could apply
221 * to anything.
222 */
223#define if_mtu if_data.ifi_mtu
224#define if_type if_data.ifi_type
225#define if_physical if_data.ifi_physical
226#define if_addrlen if_data.ifi_addrlen
227#define if_hdrlen if_data.ifi_hdrlen
228#define if_metric if_data.ifi_metric
229#define if_link_state if_data.ifi_link_state
230#define if_baudrate if_data.ifi_baudrate
231#define if_baudrate_pf if_data.ifi_baudrate_pf
232#define if_hwassist if_data.ifi_hwassist
233#define if_ipackets if_data.ifi_ipackets
234#define if_ierrors if_data.ifi_ierrors
235#define if_opackets if_data.ifi_opackets
236#define if_oerrors if_data.ifi_oerrors
237#define if_collisions if_data.ifi_collisions
238#define if_ibytes if_data.ifi_ibytes
239#define if_obytes if_data.ifi_obytes
240#define if_imcasts if_data.ifi_imcasts
241#define if_omcasts if_data.ifi_omcasts
242#define if_iqdrops if_data.ifi_iqdrops
243#define if_noproto if_data.ifi_noproto
244#define if_lastchange if_data.ifi_lastchange
245
246/* for compatibility with other BSDs */
247#define if_addrlist if_addrhead
248#define if_list if_link
249#define if_name(ifp) ((ifp)->if_xname)
250
251/*
252 * Locks for address lists on the network interface.
253 */
254#define IF_ADDR_LOCK_INIT(if) rw_init(&(if)->if_addr_lock, "if_addr_lock")
255#define IF_ADDR_LOCK_DESTROY(if) rw_destroy(&(if)->if_addr_lock)
256#define IF_ADDR_WLOCK(if) rw_wlock(&(if)->if_addr_lock)
257#define IF_ADDR_WUNLOCK(if) rw_wunlock(&(if)->if_addr_lock)
258#define IF_ADDR_RLOCK(if) rw_rlock(&(if)->if_addr_lock)
259#define IF_ADDR_RUNLOCK(if) rw_runlock(&(if)->if_addr_lock)
260#define IF_ADDR_LOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_LOCKED)
261#define IF_ADDR_WLOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_WLOCKED)
262
263/*
264 * Function variations on locking macros intended to be used by loadable
265 * kernel modules in order to divorce them from the internals of address list
266 * locking.
267 */
268void if_addr_rlock(struct ifnet *ifp); /* if_addrhead */
269void if_addr_runlock(struct ifnet *ifp); /* if_addrhead */
270void if_maddr_rlock(struct ifnet *ifp); /* if_multiaddrs */
271void if_maddr_runlock(struct ifnet *ifp); /* if_multiaddrs */
272
273/*
274 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
275 * are queues of messages stored on ifqueue structures
276 * (defined above). Entries are added to and deleted from these structures
|
278 */
279#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx)
280#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx)
281#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED)
282#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
283#define _IF_DROP(ifq) ((ifq)->ifq_drops++)
284#define _IF_QLEN(ifq) ((ifq)->ifq_len)
285
286#define _IF_ENQUEUE(ifq, m) do { \
287 (m)->m_nextpkt = NULL; \
288 if ((ifq)->ifq_tail == NULL) \
289 (ifq)->ifq_head = m; \
290 else \
291 (ifq)->ifq_tail->m_nextpkt = m; \
292 (ifq)->ifq_tail = m; \
293 (ifq)->ifq_len++; \
294} while (0)
295
296#define IF_ENQUEUE(ifq, m) do { \
297 IF_LOCK(ifq); \
298 _IF_ENQUEUE(ifq, m); \
299 IF_UNLOCK(ifq); \
300} while (0)
301
302#define _IF_PREPEND(ifq, m) do { \
303 (m)->m_nextpkt = (ifq)->ifq_head; \
304 if ((ifq)->ifq_tail == NULL) \
305 (ifq)->ifq_tail = (m); \
306 (ifq)->ifq_head = (m); \
307 (ifq)->ifq_len++; \
308} while (0)
309
310#define IF_PREPEND(ifq, m) do { \
311 IF_LOCK(ifq); \
312 _IF_PREPEND(ifq, m); \
313 IF_UNLOCK(ifq); \
314} while (0)
315
316#define _IF_DEQUEUE(ifq, m) do { \
317 (m) = (ifq)->ifq_head; \
318 if (m) { \
319 if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \
320 (ifq)->ifq_tail = NULL; \
321 (m)->m_nextpkt = NULL; \
322 (ifq)->ifq_len--; \
323 } \
324} while (0)
325
326#define IF_DEQUEUE(ifq, m) do { \
327 IF_LOCK(ifq); \
328 _IF_DEQUEUE(ifq, m); \
329 IF_UNLOCK(ifq); \
330} while (0)
331
332#define _IF_DEQUEUE_ALL(ifq, m) do { \
333 (m) = (ifq)->ifq_head; \
334 (ifq)->ifq_head = (ifq)->ifq_tail = NULL; \
335 (ifq)->ifq_len = 0; \
336} while (0)
337
338#define IF_DEQUEUE_ALL(ifq, m) do { \
339 IF_LOCK(ifq); \
340 _IF_DEQUEUE_ALL(ifq, m); \
341 IF_UNLOCK(ifq); \
342} while (0)
343
344#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
345#define IF_POLL(ifq, m) _IF_POLL(ifq, m)
346
347#define _IF_DRAIN(ifq) do { \
348 struct mbuf *m; \
349 for (;;) { \
350 _IF_DEQUEUE(ifq, m); \
351 if (m == NULL) \
352 break; \
353 m_freem(m); \
354 } \
355} while (0)
356
357#define IF_DRAIN(ifq) do { \
358 IF_LOCK(ifq); \
359 _IF_DRAIN(ifq); \
360 IF_UNLOCK(ifq); \
361} while(0)
362
363#ifdef _KERNEL
364/* interface link layer address change event */
365typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *);
366EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t);
367/* interface address change event */
368typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
369EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
370/* new interface arrival event */
371typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
372EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
373/* interface departure event */
374typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
375EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
376/* Interface link state change event */
377typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int);
378EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t);
379
380/*
381 * interface groups
382 */
383struct ifg_group {
384 char ifg_group[IFNAMSIZ];
385 u_int ifg_refcnt;
386 void *ifg_pf_kif;
387 TAILQ_HEAD(, ifg_member) ifg_members;
388 TAILQ_ENTRY(ifg_group) ifg_next;
389};
390
391struct ifg_member {
392 TAILQ_ENTRY(ifg_member) ifgm_next;
393 struct ifnet *ifgm_ifp;
394};
395
396struct ifg_list {
397 struct ifg_group *ifgl_group;
398 TAILQ_ENTRY(ifg_list) ifgl_next;
399};
400
401/* group attach event */
402typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *);
403EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t);
404/* group detach event */
405typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *);
406EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t);
407/* group change event */
408typedef void (*group_change_event_handler_t)(void *, const char *);
409EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t);
410
411#define IF_AFDATA_LOCK_INIT(ifp) \
412 rw_init(&(ifp)->if_afdata_lock, "if_afdata")
413
414#define IF_AFDATA_WLOCK(ifp) rw_wlock(&(ifp)->if_afdata_lock)
415#define IF_AFDATA_RLOCK(ifp) rw_rlock(&(ifp)->if_afdata_lock)
416#define IF_AFDATA_WUNLOCK(ifp) rw_wunlock(&(ifp)->if_afdata_lock)
417#define IF_AFDATA_RUNLOCK(ifp) rw_runlock(&(ifp)->if_afdata_lock)
418#define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp)
419#define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp)
420#define IF_AFDATA_TRYLOCK(ifp) rw_try_wlock(&(ifp)->if_afdata_lock)
421#define IF_AFDATA_DESTROY(ifp) rw_destroy(&(ifp)->if_afdata_lock)
422
423#define IF_AFDATA_LOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED)
424#define IF_AFDATA_RLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED)
425#define IF_AFDATA_WLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED)
426#define IF_AFDATA_UNLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED)
427
428int if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp,
429 int adjust);
430#define IF_HANDOFF(ifq, m, ifp) \
431 if_handoff((struct ifqueue *)ifq, m, ifp, 0)
432#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \
433 if_handoff((struct ifqueue *)ifq, m, ifp, adj)
434
435void if_start(struct ifnet *);
436
437#define IFQ_ENQUEUE(ifq, m, err) \
438do { \
439 IF_LOCK(ifq); \
440 if (ALTQ_IS_ENABLED(ifq)) \
441 ALTQ_ENQUEUE(ifq, m, NULL, err); \
442 else { \
443 if (_IF_QFULL(ifq)) { \
444 m_freem(m); \
445 (err) = ENOBUFS; \
446 } else { \
447 _IF_ENQUEUE(ifq, m); \
448 (err) = 0; \
449 } \
450 } \
451 if (err) \
452 (ifq)->ifq_drops++; \
453 IF_UNLOCK(ifq); \
454} while (0)
455
456#define IFQ_DEQUEUE_NOLOCK(ifq, m) \
457do { \
458 if (TBR_IS_ENABLED(ifq)) \
459 (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \
460 else if (ALTQ_IS_ENABLED(ifq)) \
461 ALTQ_DEQUEUE(ifq, m); \
462 else \
463 _IF_DEQUEUE(ifq, m); \
464} while (0)
465
466#define IFQ_DEQUEUE(ifq, m) \
467do { \
468 IF_LOCK(ifq); \
469 IFQ_DEQUEUE_NOLOCK(ifq, m); \
470 IF_UNLOCK(ifq); \
471} while (0)
472
473#define IFQ_POLL_NOLOCK(ifq, m) \
474do { \
475 if (TBR_IS_ENABLED(ifq)) \
476 (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \
477 else if (ALTQ_IS_ENABLED(ifq)) \
478 ALTQ_POLL(ifq, m); \
479 else \
480 _IF_POLL(ifq, m); \
481} while (0)
482
483#define IFQ_POLL(ifq, m) \
484do { \
485 IF_LOCK(ifq); \
486 IFQ_POLL_NOLOCK(ifq, m); \
487 IF_UNLOCK(ifq); \
488} while (0)
489
490#define IFQ_PURGE_NOLOCK(ifq) \
491do { \
492 if (ALTQ_IS_ENABLED(ifq)) { \
493 ALTQ_PURGE(ifq); \
494 } else \
495 _IF_DRAIN(ifq); \
496} while (0)
497
498#define IFQ_PURGE(ifq) \
499do { \
500 IF_LOCK(ifq); \
501 IFQ_PURGE_NOLOCK(ifq); \
502 IF_UNLOCK(ifq); \
503} while (0)
504
505#define IFQ_SET_READY(ifq) \
506 do { ((ifq)->altq_flags |= ALTQF_READY); } while (0)
507
508#define IFQ_LOCK(ifq) IF_LOCK(ifq)
509#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq)
510#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq)
511#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
512#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++)
513#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len)
514#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++)
515#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len))
516
517/*
518 * The IFF_DRV_OACTIVE test should really occur in the device driver, not in
519 * the handoff logic, as that flag is locked by the device driver.
520 */
521#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \
522do { \
523 int len; \
524 short mflags; \
525 \
526 len = (m)->m_pkthdr.len; \
527 mflags = (m)->m_flags; \
528 IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \
529 if ((err) == 0) { \
530 (ifp)->if_obytes += len + (adj); \
531 if (mflags & M_MCAST) \
532 (ifp)->if_omcasts++; \
533 if (((ifp)->if_drv_flags & IFF_DRV_OACTIVE) == 0) \
534 if_start(ifp); \
535 } \
536} while (0)
537
538#define IFQ_HANDOFF(ifp, m, err) \
539 IFQ_HANDOFF_ADJ(ifp, m, 0, err)
540
541#define IFQ_DRV_DEQUEUE(ifq, m) \
542do { \
543 (m) = (ifq)->ifq_drv_head; \
544 if (m) { \
545 if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \
546 (ifq)->ifq_drv_tail = NULL; \
547 (m)->m_nextpkt = NULL; \
548 (ifq)->ifq_drv_len--; \
549 } else { \
550 IFQ_LOCK(ifq); \
551 IFQ_DEQUEUE_NOLOCK(ifq, m); \
552 while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \
553 struct mbuf *m0; \
554 IFQ_DEQUEUE_NOLOCK(ifq, m0); \
555 if (m0 == NULL) \
556 break; \
557 m0->m_nextpkt = NULL; \
558 if ((ifq)->ifq_drv_tail == NULL) \
559 (ifq)->ifq_drv_head = m0; \
560 else \
561 (ifq)->ifq_drv_tail->m_nextpkt = m0; \
562 (ifq)->ifq_drv_tail = m0; \
563 (ifq)->ifq_drv_len++; \
564 } \
565 IFQ_UNLOCK(ifq); \
566 } \
567} while (0)
568
569#define IFQ_DRV_PREPEND(ifq, m) \
570do { \
571 (m)->m_nextpkt = (ifq)->ifq_drv_head; \
572 if ((ifq)->ifq_drv_tail == NULL) \
573 (ifq)->ifq_drv_tail = (m); \
574 (ifq)->ifq_drv_head = (m); \
575 (ifq)->ifq_drv_len++; \
576} while (0)
577
578#define IFQ_DRV_IS_EMPTY(ifq) \
579 (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0))
580
581#define IFQ_DRV_PURGE(ifq) \
582do { \
583 struct mbuf *m, *n = (ifq)->ifq_drv_head; \
584 while((m = n) != NULL) { \
585 n = m->m_nextpkt; \
586 m_freem(m); \
587 } \
588 (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \
589 (ifq)->ifq_drv_len = 0; \
590 IFQ_PURGE(ifq); \
591} while (0)
592
593#ifdef _KERNEL
594static __inline void
595if_initbaudrate(struct ifnet *ifp, uintmax_t baud)
596{
597
598 ifp->if_baudrate_pf = 0;
599 while (baud > (u_long)(~0UL)) {
600 baud /= 10;
601 ifp->if_baudrate_pf++;
602 }
603 ifp->if_baudrate = baud;
604}
605
606static __inline int
607drbr_enqueue(struct ifnet *ifp, struct buf_ring *br, struct mbuf *m)
608{
609 int error = 0;
610
611#ifdef ALTQ
612 if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
613 IFQ_ENQUEUE(&ifp->if_snd, m, error);
614 return (error);
615 }
616#endif
617 error = buf_ring_enqueue(br, m);
618 if (error)
619 m_freem(m);
620
621 return (error);
622}
623
624static __inline void
625drbr_flush(struct ifnet *ifp, struct buf_ring *br)
626{
627 struct mbuf *m;
628
629#ifdef ALTQ
630 if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd))
631 IFQ_PURGE(&ifp->if_snd);
632#endif
633 while ((m = buf_ring_dequeue_sc(br)) != NULL)
634 m_freem(m);
635}
636
637static __inline void
638drbr_free(struct buf_ring *br, struct malloc_type *type)
639{
640
641 drbr_flush(NULL, br);
642 buf_ring_free(br, type);
643}
644
645static __inline struct mbuf *
646drbr_dequeue(struct ifnet *ifp, struct buf_ring *br)
647{
648#ifdef ALTQ
649 struct mbuf *m;
650
651 if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
652 IFQ_DEQUEUE(&ifp->if_snd, m);
653 return (m);
654 }
655#endif
656 return (buf_ring_dequeue_sc(br));
657}
658
659static __inline struct mbuf *
660drbr_dequeue_cond(struct ifnet *ifp, struct buf_ring *br,
661 int (*func) (struct mbuf *, void *), void *arg)
662{
663 struct mbuf *m;
664#ifdef ALTQ
665 if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
666 IFQ_LOCK(&ifp->if_snd);
667 IFQ_POLL_NOLOCK(&ifp->if_snd, m);
668 if (m != NULL && func(m, arg) == 0) {
669 IFQ_UNLOCK(&ifp->if_snd);
670 return (NULL);
671 }
672 IFQ_DEQUEUE_NOLOCK(&ifp->if_snd, m);
673 IFQ_UNLOCK(&ifp->if_snd);
674 return (m);
675 }
676#endif
677 m = buf_ring_peek(br);
678 if (m == NULL || func(m, arg) == 0)
679 return (NULL);
680
681 return (buf_ring_dequeue_sc(br));
682}
683
684static __inline int
685drbr_empty(struct ifnet *ifp, struct buf_ring *br)
686{
687#ifdef ALTQ
688 if (ALTQ_IS_ENABLED(&ifp->if_snd))
689 return (IFQ_IS_EMPTY(&ifp->if_snd));
690#endif
691 return (buf_ring_empty(br));
692}
693
694static __inline int
695drbr_needs_enqueue(struct ifnet *ifp, struct buf_ring *br)
696{
697#ifdef ALTQ
698 if (ALTQ_IS_ENABLED(&ifp->if_snd))
699 return (1);
700#endif
701 return (!buf_ring_empty(br));
702}
703
704static __inline int
705drbr_inuse(struct ifnet *ifp, struct buf_ring *br)
706{
707#ifdef ALTQ
708 if (ALTQ_IS_ENABLED(&ifp->if_snd))
709 return (ifp->if_snd.ifq_len);
710#endif
711 return (buf_ring_count(br));
712}
713#endif
714/*
715 * 72 was chosen below because it is the size of a TCP/IP
716 * header (40) + the minimum mss (32).
717 */
718#define IF_MINMTU 72
719#define IF_MAXMTU 65535
720
721#define TOEDEV(ifp) ((ifp)->if_llsoftc)
722
723#endif /* _KERNEL */
724
725/*
726 * The ifaddr structure contains information about one address
727 * of an interface. They are maintained by the different address families,
728 * are allocated and attached when an address is set, and are linked
729 * together so all addresses for an interface can be located.
730 *
731 * NOTE: a 'struct ifaddr' is always at the beginning of a larger
732 * chunk of malloc'ed memory, where we store the three addresses
733 * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
734 */
735struct ifaddr {
736 struct sockaddr *ifa_addr; /* address of interface */
737 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
738#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
739 struct sockaddr *ifa_netmask; /* used to determine subnet */
740 struct if_data if_data; /* not all members are meaningful */
741 struct ifnet *ifa_ifp; /* back-pointer to interface */
742 struct carp_softc *ifa_carp; /* pointer to CARP data */
743 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */
744 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
745 (int, struct rtentry *, struct rt_addrinfo *);
746 u_short ifa_flags; /* mostly rt_flags for cloning */
747 u_int ifa_refcnt; /* references to this structure */
748 int ifa_metric; /* cost of going out this interface */
749 int (*ifa_claim_addr) /* check if an addr goes to this if */
750 (struct ifaddr *, struct sockaddr *);
751 struct mtx ifa_mtx;
752};
753#define IFA_ROUTE RTF_UP /* route installed */
754#define IFA_RTSELF RTF_HOST /* loopback route to self installed */
755
756/* for compatibility with other BSDs */
757#define ifa_list ifa_link
758
759#ifdef _KERNEL
760#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx)
761#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx)
762
763void ifa_free(struct ifaddr *ifa);
764void ifa_init(struct ifaddr *ifa);
765void ifa_ref(struct ifaddr *ifa);
766#endif
767
768/*
769 * Multicast address structure. This is analogous to the ifaddr
770 * structure except that it keeps track of multicast addresses.
771 */
772struct ifmultiaddr {
773 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
774 struct sockaddr *ifma_addr; /* address this membership is for */
775 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
776 struct ifnet *ifma_ifp; /* back-pointer to interface */
777 u_int ifma_refcount; /* reference count */
778 void *ifma_protospec; /* protocol-specific state, if any */
779 struct ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */
780};
781
782#ifdef _KERNEL
783
784extern struct rwlock ifnet_rwlock;
785extern struct sx ifnet_sxlock;
786
787#define IFNET_LOCK_INIT() do { \
788 rw_init_flags(&ifnet_rwlock, "ifnet_rw", RW_RECURSE); \
789 sx_init_flags(&ifnet_sxlock, "ifnet_sx", SX_RECURSE); \
790} while(0)
791
792#define IFNET_WLOCK() do { \
793 sx_xlock(&ifnet_sxlock); \
794 rw_wlock(&ifnet_rwlock); \
795} while (0)
796
797#define IFNET_WUNLOCK() do { \
798 rw_wunlock(&ifnet_rwlock); \
799 sx_xunlock(&ifnet_sxlock); \
800} while (0)
801
802/*
803 * To assert the ifnet lock, you must know not only whether it's for read or
804 * write, but also whether it was acquired with sleep support or not.
805 */
806#define IFNET_RLOCK_ASSERT() sx_assert(&ifnet_sxlock, SA_SLOCKED)
807#define IFNET_RLOCK_NOSLEEP_ASSERT() rw_assert(&ifnet_rwlock, RA_RLOCKED)
808#define IFNET_WLOCK_ASSERT() do { \
809 sx_assert(&ifnet_sxlock, SA_XLOCKED); \
810 rw_assert(&ifnet_rwlock, RA_WLOCKED); \
811} while (0)
812
813#define IFNET_RLOCK() sx_slock(&ifnet_sxlock)
814#define IFNET_RLOCK_NOSLEEP() rw_rlock(&ifnet_rwlock)
815#define IFNET_RUNLOCK() sx_sunlock(&ifnet_sxlock)
816#define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock)
817
818/*
819 * Look up an ifnet given its index; the _ref variant also acquires a
820 * reference that must be freed using if_rele(). It is almost always a bug
821 * to call ifnet_byindex() instead if ifnet_byindex_ref().
822 */
823struct ifnet *ifnet_byindex(u_short idx);
824struct ifnet *ifnet_byindex_locked(u_short idx);
825struct ifnet *ifnet_byindex_ref(u_short idx);
826
827/*
828 * Given the index, ifaddr_byindex() returns the one and only
829 * link-level ifaddr for the interface. You are not supposed to use
830 * it to traverse the list of addresses associated to the interface.
831 */
832struct ifaddr *ifaddr_byindex(u_short idx);
833
834VNET_DECLARE(struct ifnethead, ifnet);
835VNET_DECLARE(struct ifgrouphead, ifg_head);
836VNET_DECLARE(int, if_index);
837VNET_DECLARE(struct ifnet *, loif); /* first loopback interface */
838VNET_DECLARE(int, useloopback);
839
840#define V_ifnet VNET(ifnet)
841#define V_ifg_head VNET(ifg_head)
842#define V_if_index VNET(if_index)
843#define V_loif VNET(loif)
844#define V_useloopback VNET(useloopback)
845
846extern int ifqmaxlen;
847
848int if_addgroup(struct ifnet *, const char *);
849int if_delgroup(struct ifnet *, const char *);
850int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
851int if_allmulti(struct ifnet *, int);
852struct ifnet* if_alloc(u_char);
853void if_attach(struct ifnet *);
854void if_dead(struct ifnet *);
855int if_delmulti(struct ifnet *, struct sockaddr *);
856void if_delmulti_ifma(struct ifmultiaddr *);
857void if_detach(struct ifnet *);
858void if_vmove(struct ifnet *, struct vnet *);
859void if_purgeaddrs(struct ifnet *);
860void if_delallmulti(struct ifnet *);
861void if_down(struct ifnet *);
862struct ifmultiaddr *
863 if_findmulti(struct ifnet *, struct sockaddr *);
864void if_free(struct ifnet *);
865void if_initname(struct ifnet *, const char *, int);
866void if_link_state_change(struct ifnet *, int);
867int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
868void if_qflush(struct ifnet *);
869void if_ref(struct ifnet *);
870void if_rele(struct ifnet *);
871int if_setlladdr(struct ifnet *, const u_char *, int);
872void if_up(struct ifnet *);
873int ifioctl(struct socket *, u_long, caddr_t, struct thread *);
874int ifpromisc(struct ifnet *, int);
875struct ifnet *ifunit(const char *);
876struct ifnet *ifunit_ref(const char *);
877
878void ifq_init(struct ifaltq *, struct ifnet *ifp);
879void ifq_delete(struct ifaltq *);
880
881int ifa_add_loopback_route(struct ifaddr *, struct sockaddr *);
882int ifa_del_loopback_route(struct ifaddr *, struct sockaddr *);
883
884struct ifaddr *ifa_ifwithaddr(struct sockaddr *);
885int ifa_ifwithaddr_check(struct sockaddr *);
886struct ifaddr *ifa_ifwithbroadaddr(struct sockaddr *);
887struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
888struct ifaddr *ifa_ifwithnet(struct sockaddr *, int);
889struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *);
890struct ifaddr *ifa_ifwithroute_fib(int, struct sockaddr *, struct sockaddr *, u_int);
891
892struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
893
894int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
895
896typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp);
897typedef void if_com_free_t(void *com, u_char type);
898void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
899void if_deregister_com_alloc(u_char type);
900
901#define IF_LLADDR(ifp) \
902 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
903
904#ifdef DEVICE_POLLING
905enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS };
906
907typedef int poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count);
908int ether_poll_register(poll_handler_t *h, struct ifnet *ifp);
909int ether_poll_deregister(struct ifnet *ifp);
910#endif /* DEVICE_POLLING */
911
912#endif /* _KERNEL */
913
914#endif /* !_NET_IF_VAR_H_ */
| 278 */
279#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx)
280#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx)
281#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED)
282#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
283#define _IF_DROP(ifq) ((ifq)->ifq_drops++)
284#define _IF_QLEN(ifq) ((ifq)->ifq_len)
285
286#define _IF_ENQUEUE(ifq, m) do { \
287 (m)->m_nextpkt = NULL; \
288 if ((ifq)->ifq_tail == NULL) \
289 (ifq)->ifq_head = m; \
290 else \
291 (ifq)->ifq_tail->m_nextpkt = m; \
292 (ifq)->ifq_tail = m; \
293 (ifq)->ifq_len++; \
294} while (0)
295
296#define IF_ENQUEUE(ifq, m) do { \
297 IF_LOCK(ifq); \
298 _IF_ENQUEUE(ifq, m); \
299 IF_UNLOCK(ifq); \
300} while (0)
301
302#define _IF_PREPEND(ifq, m) do { \
303 (m)->m_nextpkt = (ifq)->ifq_head; \
304 if ((ifq)->ifq_tail == NULL) \
305 (ifq)->ifq_tail = (m); \
306 (ifq)->ifq_head = (m); \
307 (ifq)->ifq_len++; \
308} while (0)
309
310#define IF_PREPEND(ifq, m) do { \
311 IF_LOCK(ifq); \
312 _IF_PREPEND(ifq, m); \
313 IF_UNLOCK(ifq); \
314} while (0)
315
316#define _IF_DEQUEUE(ifq, m) do { \
317 (m) = (ifq)->ifq_head; \
318 if (m) { \
319 if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \
320 (ifq)->ifq_tail = NULL; \
321 (m)->m_nextpkt = NULL; \
322 (ifq)->ifq_len--; \
323 } \
324} while (0)
325
326#define IF_DEQUEUE(ifq, m) do { \
327 IF_LOCK(ifq); \
328 _IF_DEQUEUE(ifq, m); \
329 IF_UNLOCK(ifq); \
330} while (0)
331
332#define _IF_DEQUEUE_ALL(ifq, m) do { \
333 (m) = (ifq)->ifq_head; \
334 (ifq)->ifq_head = (ifq)->ifq_tail = NULL; \
335 (ifq)->ifq_len = 0; \
336} while (0)
337
338#define IF_DEQUEUE_ALL(ifq, m) do { \
339 IF_LOCK(ifq); \
340 _IF_DEQUEUE_ALL(ifq, m); \
341 IF_UNLOCK(ifq); \
342} while (0)
343
344#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
345#define IF_POLL(ifq, m) _IF_POLL(ifq, m)
346
347#define _IF_DRAIN(ifq) do { \
348 struct mbuf *m; \
349 for (;;) { \
350 _IF_DEQUEUE(ifq, m); \
351 if (m == NULL) \
352 break; \
353 m_freem(m); \
354 } \
355} while (0)
356
357#define IF_DRAIN(ifq) do { \
358 IF_LOCK(ifq); \
359 _IF_DRAIN(ifq); \
360 IF_UNLOCK(ifq); \
361} while(0)
362
363#ifdef _KERNEL
364/* interface link layer address change event */
365typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *);
366EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t);
367/* interface address change event */
368typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
369EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
370/* new interface arrival event */
371typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
372EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
373/* interface departure event */
374typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
375EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
376/* Interface link state change event */
377typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int);
378EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t);
379
380/*
381 * interface groups
382 */
383struct ifg_group {
384 char ifg_group[IFNAMSIZ];
385 u_int ifg_refcnt;
386 void *ifg_pf_kif;
387 TAILQ_HEAD(, ifg_member) ifg_members;
388 TAILQ_ENTRY(ifg_group) ifg_next;
389};
390
391struct ifg_member {
392 TAILQ_ENTRY(ifg_member) ifgm_next;
393 struct ifnet *ifgm_ifp;
394};
395
396struct ifg_list {
397 struct ifg_group *ifgl_group;
398 TAILQ_ENTRY(ifg_list) ifgl_next;
399};
400
401/* group attach event */
402typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *);
403EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t);
404/* group detach event */
405typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *);
406EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t);
407/* group change event */
408typedef void (*group_change_event_handler_t)(void *, const char *);
409EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t);
410
411#define IF_AFDATA_LOCK_INIT(ifp) \
412 rw_init(&(ifp)->if_afdata_lock, "if_afdata")
413
414#define IF_AFDATA_WLOCK(ifp) rw_wlock(&(ifp)->if_afdata_lock)
415#define IF_AFDATA_RLOCK(ifp) rw_rlock(&(ifp)->if_afdata_lock)
416#define IF_AFDATA_WUNLOCK(ifp) rw_wunlock(&(ifp)->if_afdata_lock)
417#define IF_AFDATA_RUNLOCK(ifp) rw_runlock(&(ifp)->if_afdata_lock)
418#define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp)
419#define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp)
420#define IF_AFDATA_TRYLOCK(ifp) rw_try_wlock(&(ifp)->if_afdata_lock)
421#define IF_AFDATA_DESTROY(ifp) rw_destroy(&(ifp)->if_afdata_lock)
422
423#define IF_AFDATA_LOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED)
424#define IF_AFDATA_RLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED)
425#define IF_AFDATA_WLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED)
426#define IF_AFDATA_UNLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED)
427
428int if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp,
429 int adjust);
430#define IF_HANDOFF(ifq, m, ifp) \
431 if_handoff((struct ifqueue *)ifq, m, ifp, 0)
432#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \
433 if_handoff((struct ifqueue *)ifq, m, ifp, adj)
434
435void if_start(struct ifnet *);
436
437#define IFQ_ENQUEUE(ifq, m, err) \
438do { \
439 IF_LOCK(ifq); \
440 if (ALTQ_IS_ENABLED(ifq)) \
441 ALTQ_ENQUEUE(ifq, m, NULL, err); \
442 else { \
443 if (_IF_QFULL(ifq)) { \
444 m_freem(m); \
445 (err) = ENOBUFS; \
446 } else { \
447 _IF_ENQUEUE(ifq, m); \
448 (err) = 0; \
449 } \
450 } \
451 if (err) \
452 (ifq)->ifq_drops++; \
453 IF_UNLOCK(ifq); \
454} while (0)
455
456#define IFQ_DEQUEUE_NOLOCK(ifq, m) \
457do { \
458 if (TBR_IS_ENABLED(ifq)) \
459 (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \
460 else if (ALTQ_IS_ENABLED(ifq)) \
461 ALTQ_DEQUEUE(ifq, m); \
462 else \
463 _IF_DEQUEUE(ifq, m); \
464} while (0)
465
466#define IFQ_DEQUEUE(ifq, m) \
467do { \
468 IF_LOCK(ifq); \
469 IFQ_DEQUEUE_NOLOCK(ifq, m); \
470 IF_UNLOCK(ifq); \
471} while (0)
472
473#define IFQ_POLL_NOLOCK(ifq, m) \
474do { \
475 if (TBR_IS_ENABLED(ifq)) \
476 (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \
477 else if (ALTQ_IS_ENABLED(ifq)) \
478 ALTQ_POLL(ifq, m); \
479 else \
480 _IF_POLL(ifq, m); \
481} while (0)
482
483#define IFQ_POLL(ifq, m) \
484do { \
485 IF_LOCK(ifq); \
486 IFQ_POLL_NOLOCK(ifq, m); \
487 IF_UNLOCK(ifq); \
488} while (0)
489
490#define IFQ_PURGE_NOLOCK(ifq) \
491do { \
492 if (ALTQ_IS_ENABLED(ifq)) { \
493 ALTQ_PURGE(ifq); \
494 } else \
495 _IF_DRAIN(ifq); \
496} while (0)
497
498#define IFQ_PURGE(ifq) \
499do { \
500 IF_LOCK(ifq); \
501 IFQ_PURGE_NOLOCK(ifq); \
502 IF_UNLOCK(ifq); \
503} while (0)
504
505#define IFQ_SET_READY(ifq) \
506 do { ((ifq)->altq_flags |= ALTQF_READY); } while (0)
507
508#define IFQ_LOCK(ifq) IF_LOCK(ifq)
509#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq)
510#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq)
511#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
512#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++)
513#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len)
514#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++)
515#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len))
516
517/*
518 * The IFF_DRV_OACTIVE test should really occur in the device driver, not in
519 * the handoff logic, as that flag is locked by the device driver.
520 */
521#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \
522do { \
523 int len; \
524 short mflags; \
525 \
526 len = (m)->m_pkthdr.len; \
527 mflags = (m)->m_flags; \
528 IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \
529 if ((err) == 0) { \
530 (ifp)->if_obytes += len + (adj); \
531 if (mflags & M_MCAST) \
532 (ifp)->if_omcasts++; \
533 if (((ifp)->if_drv_flags & IFF_DRV_OACTIVE) == 0) \
534 if_start(ifp); \
535 } \
536} while (0)
537
538#define IFQ_HANDOFF(ifp, m, err) \
539 IFQ_HANDOFF_ADJ(ifp, m, 0, err)
540
541#define IFQ_DRV_DEQUEUE(ifq, m) \
542do { \
543 (m) = (ifq)->ifq_drv_head; \
544 if (m) { \
545 if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \
546 (ifq)->ifq_drv_tail = NULL; \
547 (m)->m_nextpkt = NULL; \
548 (ifq)->ifq_drv_len--; \
549 } else { \
550 IFQ_LOCK(ifq); \
551 IFQ_DEQUEUE_NOLOCK(ifq, m); \
552 while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \
553 struct mbuf *m0; \
554 IFQ_DEQUEUE_NOLOCK(ifq, m0); \
555 if (m0 == NULL) \
556 break; \
557 m0->m_nextpkt = NULL; \
558 if ((ifq)->ifq_drv_tail == NULL) \
559 (ifq)->ifq_drv_head = m0; \
560 else \
561 (ifq)->ifq_drv_tail->m_nextpkt = m0; \
562 (ifq)->ifq_drv_tail = m0; \
563 (ifq)->ifq_drv_len++; \
564 } \
565 IFQ_UNLOCK(ifq); \
566 } \
567} while (0)
568
569#define IFQ_DRV_PREPEND(ifq, m) \
570do { \
571 (m)->m_nextpkt = (ifq)->ifq_drv_head; \
572 if ((ifq)->ifq_drv_tail == NULL) \
573 (ifq)->ifq_drv_tail = (m); \
574 (ifq)->ifq_drv_head = (m); \
575 (ifq)->ifq_drv_len++; \
576} while (0)
577
578#define IFQ_DRV_IS_EMPTY(ifq) \
579 (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0))
580
581#define IFQ_DRV_PURGE(ifq) \
582do { \
583 struct mbuf *m, *n = (ifq)->ifq_drv_head; \
584 while((m = n) != NULL) { \
585 n = m->m_nextpkt; \
586 m_freem(m); \
587 } \
588 (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \
589 (ifq)->ifq_drv_len = 0; \
590 IFQ_PURGE(ifq); \
591} while (0)
592
593#ifdef _KERNEL
594static __inline void
595if_initbaudrate(struct ifnet *ifp, uintmax_t baud)
596{
597
598 ifp->if_baudrate_pf = 0;
599 while (baud > (u_long)(~0UL)) {
600 baud /= 10;
601 ifp->if_baudrate_pf++;
602 }
603 ifp->if_baudrate = baud;
604}
605
606static __inline int
607drbr_enqueue(struct ifnet *ifp, struct buf_ring *br, struct mbuf *m)
608{
609 int error = 0;
610
611#ifdef ALTQ
612 if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
613 IFQ_ENQUEUE(&ifp->if_snd, m, error);
614 return (error);
615 }
616#endif
617 error = buf_ring_enqueue(br, m);
618 if (error)
619 m_freem(m);
620
621 return (error);
622}
623
624static __inline void
625drbr_flush(struct ifnet *ifp, struct buf_ring *br)
626{
627 struct mbuf *m;
628
629#ifdef ALTQ
630 if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd))
631 IFQ_PURGE(&ifp->if_snd);
632#endif
633 while ((m = buf_ring_dequeue_sc(br)) != NULL)
634 m_freem(m);
635}
636
637static __inline void
638drbr_free(struct buf_ring *br, struct malloc_type *type)
639{
640
641 drbr_flush(NULL, br);
642 buf_ring_free(br, type);
643}
644
645static __inline struct mbuf *
646drbr_dequeue(struct ifnet *ifp, struct buf_ring *br)
647{
648#ifdef ALTQ
649 struct mbuf *m;
650
651 if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
652 IFQ_DEQUEUE(&ifp->if_snd, m);
653 return (m);
654 }
655#endif
656 return (buf_ring_dequeue_sc(br));
657}
658
659static __inline struct mbuf *
660drbr_dequeue_cond(struct ifnet *ifp, struct buf_ring *br,
661 int (*func) (struct mbuf *, void *), void *arg)
662{
663 struct mbuf *m;
664#ifdef ALTQ
665 if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
666 IFQ_LOCK(&ifp->if_snd);
667 IFQ_POLL_NOLOCK(&ifp->if_snd, m);
668 if (m != NULL && func(m, arg) == 0) {
669 IFQ_UNLOCK(&ifp->if_snd);
670 return (NULL);
671 }
672 IFQ_DEQUEUE_NOLOCK(&ifp->if_snd, m);
673 IFQ_UNLOCK(&ifp->if_snd);
674 return (m);
675 }
676#endif
677 m = buf_ring_peek(br);
678 if (m == NULL || func(m, arg) == 0)
679 return (NULL);
680
681 return (buf_ring_dequeue_sc(br));
682}
683
684static __inline int
685drbr_empty(struct ifnet *ifp, struct buf_ring *br)
686{
687#ifdef ALTQ
688 if (ALTQ_IS_ENABLED(&ifp->if_snd))
689 return (IFQ_IS_EMPTY(&ifp->if_snd));
690#endif
691 return (buf_ring_empty(br));
692}
693
694static __inline int
695drbr_needs_enqueue(struct ifnet *ifp, struct buf_ring *br)
696{
697#ifdef ALTQ
698 if (ALTQ_IS_ENABLED(&ifp->if_snd))
699 return (1);
700#endif
701 return (!buf_ring_empty(br));
702}
703
704static __inline int
705drbr_inuse(struct ifnet *ifp, struct buf_ring *br)
706{
707#ifdef ALTQ
708 if (ALTQ_IS_ENABLED(&ifp->if_snd))
709 return (ifp->if_snd.ifq_len);
710#endif
711 return (buf_ring_count(br));
712}
713#endif
714/*
715 * 72 was chosen below because it is the size of a TCP/IP
716 * header (40) + the minimum mss (32).
717 */
718#define IF_MINMTU 72
719#define IF_MAXMTU 65535
720
721#define TOEDEV(ifp) ((ifp)->if_llsoftc)
722
723#endif /* _KERNEL */
724
725/*
726 * The ifaddr structure contains information about one address
727 * of an interface. They are maintained by the different address families,
728 * are allocated and attached when an address is set, and are linked
729 * together so all addresses for an interface can be located.
730 *
731 * NOTE: a 'struct ifaddr' is always at the beginning of a larger
732 * chunk of malloc'ed memory, where we store the three addresses
733 * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
734 */
735struct ifaddr {
736 struct sockaddr *ifa_addr; /* address of interface */
737 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
738#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
739 struct sockaddr *ifa_netmask; /* used to determine subnet */
740 struct if_data if_data; /* not all members are meaningful */
741 struct ifnet *ifa_ifp; /* back-pointer to interface */
742 struct carp_softc *ifa_carp; /* pointer to CARP data */
743 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */
744 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
745 (int, struct rtentry *, struct rt_addrinfo *);
746 u_short ifa_flags; /* mostly rt_flags for cloning */
747 u_int ifa_refcnt; /* references to this structure */
748 int ifa_metric; /* cost of going out this interface */
749 int (*ifa_claim_addr) /* check if an addr goes to this if */
750 (struct ifaddr *, struct sockaddr *);
751 struct mtx ifa_mtx;
752};
753#define IFA_ROUTE RTF_UP /* route installed */
754#define IFA_RTSELF RTF_HOST /* loopback route to self installed */
755
756/* for compatibility with other BSDs */
757#define ifa_list ifa_link
758
759#ifdef _KERNEL
760#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx)
761#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx)
762
763void ifa_free(struct ifaddr *ifa);
764void ifa_init(struct ifaddr *ifa);
765void ifa_ref(struct ifaddr *ifa);
766#endif
767
768/*
769 * Multicast address structure. This is analogous to the ifaddr
770 * structure except that it keeps track of multicast addresses.
771 */
772struct ifmultiaddr {
773 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
774 struct sockaddr *ifma_addr; /* address this membership is for */
775 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
776 struct ifnet *ifma_ifp; /* back-pointer to interface */
777 u_int ifma_refcount; /* reference count */
778 void *ifma_protospec; /* protocol-specific state, if any */
779 struct ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */
780};
781
782#ifdef _KERNEL
783
784extern struct rwlock ifnet_rwlock;
785extern struct sx ifnet_sxlock;
786
787#define IFNET_LOCK_INIT() do { \
788 rw_init_flags(&ifnet_rwlock, "ifnet_rw", RW_RECURSE); \
789 sx_init_flags(&ifnet_sxlock, "ifnet_sx", SX_RECURSE); \
790} while(0)
791
792#define IFNET_WLOCK() do { \
793 sx_xlock(&ifnet_sxlock); \
794 rw_wlock(&ifnet_rwlock); \
795} while (0)
796
797#define IFNET_WUNLOCK() do { \
798 rw_wunlock(&ifnet_rwlock); \
799 sx_xunlock(&ifnet_sxlock); \
800} while (0)
801
802/*
803 * To assert the ifnet lock, you must know not only whether it's for read or
804 * write, but also whether it was acquired with sleep support or not.
805 */
806#define IFNET_RLOCK_ASSERT() sx_assert(&ifnet_sxlock, SA_SLOCKED)
807#define IFNET_RLOCK_NOSLEEP_ASSERT() rw_assert(&ifnet_rwlock, RA_RLOCKED)
808#define IFNET_WLOCK_ASSERT() do { \
809 sx_assert(&ifnet_sxlock, SA_XLOCKED); \
810 rw_assert(&ifnet_rwlock, RA_WLOCKED); \
811} while (0)
812
813#define IFNET_RLOCK() sx_slock(&ifnet_sxlock)
814#define IFNET_RLOCK_NOSLEEP() rw_rlock(&ifnet_rwlock)
815#define IFNET_RUNLOCK() sx_sunlock(&ifnet_sxlock)
816#define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock)
817
818/*
819 * Look up an ifnet given its index; the _ref variant also acquires a
820 * reference that must be freed using if_rele(). It is almost always a bug
821 * to call ifnet_byindex() instead if ifnet_byindex_ref().
822 */
823struct ifnet *ifnet_byindex(u_short idx);
824struct ifnet *ifnet_byindex_locked(u_short idx);
825struct ifnet *ifnet_byindex_ref(u_short idx);
826
827/*
828 * Given the index, ifaddr_byindex() returns the one and only
829 * link-level ifaddr for the interface. You are not supposed to use
830 * it to traverse the list of addresses associated to the interface.
831 */
832struct ifaddr *ifaddr_byindex(u_short idx);
833
834VNET_DECLARE(struct ifnethead, ifnet);
835VNET_DECLARE(struct ifgrouphead, ifg_head);
836VNET_DECLARE(int, if_index);
837VNET_DECLARE(struct ifnet *, loif); /* first loopback interface */
838VNET_DECLARE(int, useloopback);
839
840#define V_ifnet VNET(ifnet)
841#define V_ifg_head VNET(ifg_head)
842#define V_if_index VNET(if_index)
843#define V_loif VNET(loif)
844#define V_useloopback VNET(useloopback)
845
846extern int ifqmaxlen;
847
848int if_addgroup(struct ifnet *, const char *);
849int if_delgroup(struct ifnet *, const char *);
850int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
851int if_allmulti(struct ifnet *, int);
852struct ifnet* if_alloc(u_char);
853void if_attach(struct ifnet *);
854void if_dead(struct ifnet *);
855int if_delmulti(struct ifnet *, struct sockaddr *);
856void if_delmulti_ifma(struct ifmultiaddr *);
857void if_detach(struct ifnet *);
858void if_vmove(struct ifnet *, struct vnet *);
859void if_purgeaddrs(struct ifnet *);
860void if_delallmulti(struct ifnet *);
861void if_down(struct ifnet *);
862struct ifmultiaddr *
863 if_findmulti(struct ifnet *, struct sockaddr *);
864void if_free(struct ifnet *);
865void if_initname(struct ifnet *, const char *, int);
866void if_link_state_change(struct ifnet *, int);
867int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
868void if_qflush(struct ifnet *);
869void if_ref(struct ifnet *);
870void if_rele(struct ifnet *);
871int if_setlladdr(struct ifnet *, const u_char *, int);
872void if_up(struct ifnet *);
873int ifioctl(struct socket *, u_long, caddr_t, struct thread *);
874int ifpromisc(struct ifnet *, int);
875struct ifnet *ifunit(const char *);
876struct ifnet *ifunit_ref(const char *);
877
878void ifq_init(struct ifaltq *, struct ifnet *ifp);
879void ifq_delete(struct ifaltq *);
880
881int ifa_add_loopback_route(struct ifaddr *, struct sockaddr *);
882int ifa_del_loopback_route(struct ifaddr *, struct sockaddr *);
883
884struct ifaddr *ifa_ifwithaddr(struct sockaddr *);
885int ifa_ifwithaddr_check(struct sockaddr *);
886struct ifaddr *ifa_ifwithbroadaddr(struct sockaddr *);
887struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
888struct ifaddr *ifa_ifwithnet(struct sockaddr *, int);
889struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *);
890struct ifaddr *ifa_ifwithroute_fib(int, struct sockaddr *, struct sockaddr *, u_int);
891
892struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
893
894int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
895
896typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp);
897typedef void if_com_free_t(void *com, u_char type);
898void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
899void if_deregister_com_alloc(u_char type);
900
901#define IF_LLADDR(ifp) \
902 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
903
904#ifdef DEVICE_POLLING
905enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS };
906
907typedef int poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count);
908int ether_poll_register(poll_handler_t *h, struct ifnet *ifp);
909int ether_poll_deregister(struct ifnet *ifp);
910#endif /* DEVICE_POLLING */
911
912#endif /* _KERNEL */
913
914#endif /* !_NET_IF_VAR_H_ */
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