2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1989, 1993
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8 * modification, are permitted provided that the following conditions
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31 * From: @(#)if.h 8.1 (Berkeley) 6/10/93
35 #ifndef _NET_IF_VAR_H_
36 #define _NET_IF_VAR_H_
39 * Structures defining a network interface, providing a packet
40 * transport mechanism (ala level 0 of the PUP protocols).
42 * Each interface accepts output datagrams of a specified maximum
43 * length, and provides higher level routines with input datagrams
44 * received from its medium.
46 * Output occurs when the routine if_output is called, with three parameters:
47 * (*ifp->if_output)(ifp, m, dst, rt)
48 * Here m is the mbuf chain to be sent and dst is the destination address.
49 * The output routine encapsulates the supplied datagram if necessary,
50 * and then transmits it on its medium.
52 * On input, each interface unwraps the data received by it, and either
53 * places it on the input queue of an internetwork datagram routine
54 * and posts the associated software interrupt, or passes the datagram to a raw
55 * packet input routine.
57 * Routines exist for locating interfaces by their addresses
58 * or for locating an interface on a certain network, as well as more general
59 * routing and gateway routines maintaining information used to locate
60 * interfaces. These routines live in the files if.c and route.c
63 struct rtentry; /* ifa_rtrequest */
64 struct rt_addrinfo; /* ifa_rtrequest */
69 struct route; /* if_output */
72 struct netmap_adapter;
73 struct netdump_methods;
76 #include <sys/mbuf.h> /* ifqueue only? */
77 #include <sys/buf_ring.h>
80 #include <sys/epoch.h>
82 #include <sys/counter.h>
83 #include <sys/lock.h> /* XXX */
84 #include <sys/mutex.h> /* struct ifqueue */
85 #include <sys/rwlock.h> /* XXX */
86 #include <sys/sx.h> /* XXX */
87 #include <sys/_task.h> /* if_link_task */
88 #define IF_DUNIT_NONE -1
90 #include <net/altq/if_altq.h>
92 TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */
94 CK_STAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
95 CK_STAILQ_HEAD(ifmultihead, ifmultiaddr);
97 STAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
98 STAILQ_HEAD(ifmultihead, ifmultiaddr);
100 TAILQ_HEAD(ifgrouphead, ifg_group);
103 VNET_DECLARE(struct pfil_head, link_pfil_hook); /* packet filter hooks */
104 #define V_link_pfil_hook VNET(link_pfil_hook)
106 #define HHOOK_IPSEC_INET 0
107 #define HHOOK_IPSEC_INET6 1
108 #define HHOOK_IPSEC_COUNT 2
109 VNET_DECLARE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
110 VNET_DECLARE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
111 #define V_ipsec_hhh_in VNET(ipsec_hhh_in)
112 #define V_ipsec_hhh_out VNET(ipsec_hhh_out)
113 extern epoch_t net_epoch_preempt;
114 extern epoch_t net_epoch;
118 IFCOUNTER_IPACKETS = 0,
122 IFCOUNTER_COLLISIONS,
130 IFCOUNTERS /* Array size. */
133 typedef struct ifnet * if_t;
135 typedef void (*if_start_fn_t)(if_t);
136 typedef int (*if_ioctl_fn_t)(if_t, u_long, caddr_t);
137 typedef void (*if_init_fn_t)(void *);
138 typedef void (*if_qflush_fn_t)(if_t);
139 typedef int (*if_transmit_fn_t)(if_t, struct mbuf *);
140 typedef uint64_t (*if_get_counter_t)(if_t, ift_counter);
142 struct ifnet_hw_tsomax {
143 u_int tsomaxbytes; /* TSO total burst length limit in bytes */
144 u_int tsomaxsegcount; /* TSO maximum segment count */
145 u_int tsomaxsegsize; /* TSO maximum segment size in bytes */
148 /* Interface encap request types */
150 IFENCAP_LL = 1 /* pre-calculate link-layer header */
154 * The structure below allows to request various pre-calculated L2/L3 headers
155 * for different media. Requests varies by type (rtype field).
157 * IFENCAP_LL type: pre-calculates link header based on address family
158 * and destination lladdr.
161 * buf: pointer to destination buffer
162 * bufsize: buffer size
163 * flags: IFENCAP_FLAG_BROADCAST if destination is broadcast
164 * family: address family defined by AF_ constant.
165 * lladdr: pointer to link-layer address
166 * lladdr_len: length of link-layer address
167 * hdata: pointer to L3 header (optional, used for ARP requests).
168 * Output data fields:
169 * buf: encap data is stored here
170 * bufsize: resulting encap length is stored here
171 * lladdr_off: offset of link-layer address from encap hdr start
172 * hdata: L3 header may be altered if necessary
175 struct if_encap_req {
176 u_char *buf; /* Destination buffer (w) */
177 size_t bufsize; /* size of provided buffer (r) */
178 ife_type rtype; /* request type (r) */
179 uint32_t flags; /* Request flags (r) */
180 int family; /* Address family AF_* (r) */
181 int lladdr_off; /* offset from header start (w) */
182 int lladdr_len; /* lladdr length (r) */
183 char *lladdr; /* link-level address pointer (r) */
184 char *hdata; /* Upper layer header data (rw) */
187 #define IFENCAP_FLAG_BROADCAST 0x02 /* Destination is broadcast */
190 * Network interface send tag support. The storage of "struct
191 * m_snd_tag" comes from the network driver and it is free to allocate
192 * as much additional space as it wants for its own use.
196 #define IF_SND_TAG_TYPE_RATE_LIMIT 0
197 #define IF_SND_TAG_TYPE_UNLIMITED 1
198 #define IF_SND_TAG_TYPE_MAX 2
200 struct if_snd_tag_alloc_header {
201 uint32_t type; /* send tag type, see IF_SND_TAG_XXX */
202 uint32_t flowid; /* mbuf hash value */
203 uint32_t flowtype; /* mbuf hash type */
206 struct if_snd_tag_alloc_rate_limit {
207 struct if_snd_tag_alloc_header hdr;
208 uint64_t max_rate; /* in bytes/s */
211 struct if_snd_tag_rate_limit_params {
212 uint64_t max_rate; /* in bytes/s */
213 uint32_t queue_level; /* 0 (empty) .. 65535 (full) */
214 #define IF_SND_QUEUE_LEVEL_MIN 0
215 #define IF_SND_QUEUE_LEVEL_MAX 65535
216 uint32_t reserved; /* padding */
219 union if_snd_tag_alloc_params {
220 struct if_snd_tag_alloc_header hdr;
221 struct if_snd_tag_alloc_rate_limit rate_limit;
222 struct if_snd_tag_alloc_rate_limit unlimited;
225 union if_snd_tag_modify_params {
226 struct if_snd_tag_rate_limit_params rate_limit;
227 struct if_snd_tag_rate_limit_params unlimited;
230 union if_snd_tag_query_params {
231 struct if_snd_tag_rate_limit_params rate_limit;
232 struct if_snd_tag_rate_limit_params unlimited;
235 typedef int (if_snd_tag_alloc_t)(struct ifnet *, union if_snd_tag_alloc_params *,
236 struct m_snd_tag **);
237 typedef int (if_snd_tag_modify_t)(struct m_snd_tag *, union if_snd_tag_modify_params *);
238 typedef int (if_snd_tag_query_t)(struct m_snd_tag *, union if_snd_tag_query_params *);
239 typedef void (if_snd_tag_free_t)(struct m_snd_tag *);
242 * Structure defining a network interface.
245 /* General book keeping of interface lists. */
246 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */
247 LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */
248 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
249 /* protected by if_addr_lock */
250 u_char if_alloctype; /* if_type at time of allocation */
252 /* Driver and protocol specific information that remains stable. */
253 void *if_softc; /* pointer to driver state */
254 void *if_llsoftc; /* link layer softc */
255 void *if_l2com; /* pointer to protocol bits */
256 const char *if_dname; /* driver name */
257 int if_dunit; /* unit or IF_DUNIT_NONE */
258 u_short if_index; /* numeric abbreviation for this if */
259 short if_index_reserved; /* spare space to grow if_index */
260 char if_xname[IFNAMSIZ]; /* external name (name + unit) */
261 char *if_description; /* interface description */
263 /* Variable fields that are touched by the stack and drivers. */
264 int if_flags; /* up/down, broadcast, etc. */
265 int if_drv_flags; /* driver-managed status flags */
266 int if_capabilities; /* interface features & capabilities */
267 int if_capenable; /* enabled features & capabilities */
268 void *if_linkmib; /* link-type-specific MIB data */
269 size_t if_linkmiblen; /* length of above data */
270 u_int if_refcount; /* reference count */
272 /* These fields are shared with struct if_data. */
273 uint8_t if_type; /* ethernet, tokenring, etc */
274 uint8_t if_addrlen; /* media address length */
275 uint8_t if_hdrlen; /* media header length */
276 uint8_t if_link_state; /* current link state */
277 uint32_t if_mtu; /* maximum transmission unit */
278 uint32_t if_metric; /* routing metric (external only) */
279 uint64_t if_baudrate; /* linespeed */
280 uint64_t if_hwassist; /* HW offload capabilities, see IFCAP */
281 time_t if_epoch; /* uptime at attach or stat reset */
282 struct timeval if_lastchange; /* time of last administrative change */
284 struct ifaltq if_snd; /* output queue (includes altq) */
285 struct task if_linktask; /* task for link change events */
287 /* Addresses of different protocol families assigned to this if. */
288 struct mtx if_addr_lock; /* lock to protect address lists */
290 * if_addrhead is the list of all addresses associated to
292 * Some code in the kernel assumes that first element
293 * of the list has type AF_LINK, and contains sockaddr_dl
294 * addresses which store the link-level address and the name
296 * However, access to the AF_LINK address through this
297 * field is deprecated. Use if_addr or ifaddr_byindex() instead.
299 struct ifaddrhead if_addrhead; /* linked list of addresses per if */
300 struct ifmultihead if_multiaddrs; /* multicast addresses configured */
301 int if_amcount; /* number of all-multicast requests */
302 struct ifaddr *if_addr; /* pointer to link-level address */
303 void *if_hw_addr; /* hardware link-level address */
304 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
305 struct rwlock if_afdata_lock;
306 void *if_afdata[AF_MAX];
307 int if_afdata_initialized;
309 /* Additional features hung off the interface. */
310 u_int if_fib; /* interface FIB */
311 struct vnet *if_vnet; /* pointer to network stack instance */
312 struct vnet *if_home_vnet; /* where this ifnet originates from */
313 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
314 struct bpf_if *if_bpf; /* packet filter structure */
315 int if_pcount; /* number of promiscuous listeners */
316 void *if_bridge; /* bridge glue */
317 void *if_lagg; /* lagg glue */
318 void *if_pf_kif; /* pf glue */
319 struct carp_if *if_carp; /* carp interface structure */
320 struct label *if_label; /* interface MAC label */
321 struct netmap_adapter *if_netmap; /* netmap(4) softc */
323 /* Various procedures of the layer2 encapsulation and drivers. */
324 int (*if_output) /* output routine (enqueue) */
325 (struct ifnet *, struct mbuf *, const struct sockaddr *,
327 void (*if_input) /* input routine (from h/w driver) */
328 (struct ifnet *, struct mbuf *);
329 struct mbuf *(*if_bridge_input)(struct ifnet *, struct mbuf *);
330 int (*if_bridge_output)(struct ifnet *, struct mbuf *, struct sockaddr *,
332 void (*if_bridge_linkstate)(struct ifnet *ifp);
333 if_start_fn_t if_start; /* initiate output routine */
334 if_ioctl_fn_t if_ioctl; /* ioctl routine */
335 if_init_fn_t if_init; /* Init routine */
336 int (*if_resolvemulti) /* validate/resolve multicast */
337 (struct ifnet *, struct sockaddr **, struct sockaddr *);
338 if_qflush_fn_t if_qflush; /* flush any queue */
339 if_transmit_fn_t if_transmit; /* initiate output routine */
341 void (*if_reassign) /* reassign to vnet routine */
342 (struct ifnet *, struct vnet *, char *);
343 if_get_counter_t if_get_counter; /* get counter values */
344 int (*if_requestencap) /* make link header from request */
345 (struct ifnet *, struct if_encap_req *);
348 counter_u64_t if_counters[IFCOUNTERS];
350 /* Stuff that's only temporary and doesn't belong here. */
353 * Network adapter TSO limits:
354 * ===========================
356 * If the "if_hw_tsomax" field is zero the maximum segment
357 * length limit does not apply. If the "if_hw_tsomaxsegcount"
358 * or the "if_hw_tsomaxsegsize" field is zero the TSO segment
359 * count limit does not apply. If all three fields are zero,
360 * there is no TSO limit.
362 * NOTE: The TSO limits should reflect the values used in the
363 * BUSDMA tag a network adapter is using to load a mbuf chain
364 * for transmission. The TCP/IP network stack will subtract
365 * space for all linklevel and protocol level headers and
366 * ensure that the full mbuf chain passed to the network
367 * adapter fits within the given limits.
369 u_int if_hw_tsomax; /* TSO maximum size in bytes */
370 u_int if_hw_tsomaxsegcount; /* TSO maximum segment count */
371 u_int if_hw_tsomaxsegsize; /* TSO maximum segment size in bytes */
374 * Network adapter send tag support:
376 if_snd_tag_alloc_t *if_snd_tag_alloc;
377 if_snd_tag_modify_t *if_snd_tag_modify;
378 if_snd_tag_query_t *if_snd_tag_query;
379 if_snd_tag_free_t *if_snd_tag_free;
385 * Netdump hooks to be called while dumping.
387 struct netdump_methods *if_netdump_methods;
390 * Spare fields to be added before branching a stable branch, so
391 * that structure can be enhanced without changing the kernel
394 int if_ispare[4]; /* general use */
397 /* for compatibility with other BSDs */
398 #define if_name(ifp) ((ifp)->if_xname)
401 * Locks for address lists on the network interface.
403 #define IF_ADDR_LOCK_INIT(if) mtx_init(&(if)->if_addr_lock, "if_addr_lock", NULL, MTX_DEF)
404 #define IF_ADDR_LOCK_DESTROY(if) mtx_destroy(&(if)->if_addr_lock)
405 #define IF_ADDR_RLOCK(if) epoch_enter_preempt(net_epoch_preempt);
406 #define IF_ADDR_RUNLOCK(if) epoch_exit_preempt(net_epoch_preempt);
408 #define IF_ADDR_WLOCK(if) mtx_lock(&(if)->if_addr_lock)
409 #define IF_ADDR_WUNLOCK(if) mtx_unlock(&(if)->if_addr_lock)
410 #define IF_ADDR_LOCK_ASSERT(if) MPASS(in_epoch() || mtx_owned(&(if)->if_addr_lock))
411 #define IF_ADDR_WLOCK_ASSERT(if) mtx_assert(&(if)->if_addr_lock, MA_OWNED)
414 * Function variations on locking macros intended to be used by loadable
415 * kernel modules in order to divorce them from the internals of address list
418 void if_addr_rlock(struct ifnet *ifp); /* if_addrhead */
419 void if_addr_runlock(struct ifnet *ifp); /* if_addrhead */
420 void if_maddr_rlock(if_t ifp); /* if_multiaddrs */
421 void if_maddr_runlock(if_t ifp); /* if_multiaddrs */
424 #ifdef _SYS_EVENTHANDLER_H_
425 /* interface link layer address change event */
426 typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *);
427 EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t);
428 /* interface address change event */
429 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
430 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
431 /* new interface arrival event */
432 typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
433 EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
434 /* interface departure event */
435 typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
436 EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
437 /* Interface link state change event */
438 typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int);
439 EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t);
440 /* Interface up/down event */
441 #define IFNET_EVENT_UP 0
442 #define IFNET_EVENT_DOWN 1
443 #define IFNET_EVENT_PCP 2 /* priority code point, PCP */
445 typedef void (*ifnet_event_fn)(void *, struct ifnet *ifp, int event);
446 EVENTHANDLER_DECLARE(ifnet_event, ifnet_event_fn);
447 #endif /* _SYS_EVENTHANDLER_H_ */
453 char ifg_group[IFNAMSIZ];
456 TAILQ_HEAD(, ifg_member) ifg_members;
457 TAILQ_ENTRY(ifg_group) ifg_next;
461 TAILQ_ENTRY(ifg_member) ifgm_next;
462 struct ifnet *ifgm_ifp;
466 struct ifg_group *ifgl_group;
467 TAILQ_ENTRY(ifg_list) ifgl_next;
470 #ifdef _SYS_EVENTHANDLER_H_
471 /* group attach event */
472 typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *);
473 EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t);
474 /* group detach event */
475 typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *);
476 EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t);
477 /* group change event */
478 typedef void (*group_change_event_handler_t)(void *, const char *);
479 EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t);
480 #endif /* _SYS_EVENTHANDLER_H_ */
482 #define IF_AFDATA_LOCK_INIT(ifp) \
483 rw_init(&(ifp)->if_afdata_lock, "if_afdata")
485 #define IF_AFDATA_WLOCK(ifp) rw_wlock(&(ifp)->if_afdata_lock)
486 #define IF_AFDATA_RLOCK(ifp) rw_rlock(&(ifp)->if_afdata_lock)
487 #define IF_AFDATA_WUNLOCK(ifp) rw_wunlock(&(ifp)->if_afdata_lock)
488 #define IF_AFDATA_RUNLOCK(ifp) rw_runlock(&(ifp)->if_afdata_lock)
489 #define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp)
490 #define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp)
491 #define IF_AFDATA_TRYLOCK(ifp) rw_try_wlock(&(ifp)->if_afdata_lock)
492 #define IF_AFDATA_DESTROY(ifp) rw_destroy(&(ifp)->if_afdata_lock)
494 #define IF_AFDATA_LOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED)
495 #define IF_AFDATA_RLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED)
496 #define IF_AFDATA_WLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED)
497 #define IF_AFDATA_UNLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED)
500 * 72 was chosen below because it is the size of a TCP/IP
501 * header (40) + the minimum mss (32).
504 #define IF_MAXMTU 65535
506 #define TOEDEV(ifp) ((ifp)->if_llsoftc)
509 * The ifaddr structure contains information about one address
510 * of an interface. They are maintained by the different address families,
511 * are allocated and attached when an address is set, and are linked
512 * together so all addresses for an interface can be located.
514 * NOTE: a 'struct ifaddr' is always at the beginning of a larger
515 * chunk of malloc'ed memory, where we store the three addresses
516 * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
519 struct sockaddr *ifa_addr; /* address of interface */
520 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
521 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
522 struct sockaddr *ifa_netmask; /* used to determine subnet */
523 struct ifnet *ifa_ifp; /* back-pointer to interface */
524 struct carp_softc *ifa_carp; /* pointer to CARP data */
525 STAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */
526 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */
527 (int, struct rtentry *, struct rt_addrinfo *);
528 u_short ifa_flags; /* mostly rt_flags for cloning */
529 #define IFA_ROUTE RTF_UP /* route installed */
530 #define IFA_RTSELF RTF_HOST /* loopback route to self installed */
531 u_int ifa_refcnt; /* references to this structure */
533 counter_u64_t ifa_ipackets;
534 counter_u64_t ifa_opackets;
535 counter_u64_t ifa_ibytes;
536 counter_u64_t ifa_obytes;
537 struct epoch_context ifa_epoch_ctx;
540 struct ifaddr * ifa_alloc(size_t size, int flags);
541 void ifa_free(struct ifaddr *ifa);
542 void ifa_ref(struct ifaddr *ifa);
545 * Multicast address structure. This is analogous to the ifaddr
546 * structure except that it keeps track of multicast addresses.
549 STAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
550 struct sockaddr *ifma_addr; /* address this membership is for */
551 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */
552 struct ifnet *ifma_ifp; /* back-pointer to interface */
553 u_int ifma_refcount; /* reference count */
554 void *ifma_protospec; /* protocol-specific state, if any */
555 struct ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */
556 struct epoch_context ifma_epoch_ctx;
559 extern struct rwlock ifnet_rwlock;
560 extern struct sx ifnet_sxlock;
562 #define IFNET_WLOCK() do { \
563 sx_xlock(&ifnet_sxlock); \
564 rw_wlock(&ifnet_rwlock); \
567 #define IFNET_WUNLOCK() do { \
568 rw_wunlock(&ifnet_rwlock); \
569 sx_xunlock(&ifnet_sxlock); \
573 * To assert the ifnet lock, you must know not only whether it's for read or
574 * write, but also whether it was acquired with sleep support or not.
576 #define IFNET_RLOCK_ASSERT() sx_assert(&ifnet_sxlock, SA_SLOCKED)
577 #define IFNET_RLOCK_NOSLEEP_ASSERT() rw_assert(&ifnet_rwlock, RA_RLOCKED)
578 #define IFNET_WLOCK_ASSERT() do { \
579 sx_assert(&ifnet_sxlock, SA_XLOCKED); \
580 rw_assert(&ifnet_rwlock, RA_WLOCKED); \
583 #define IFNET_RLOCK() sx_slock(&ifnet_sxlock)
584 #define IFNET_RLOCK_NOSLEEP() rw_rlock(&ifnet_rwlock)
585 #define IFNET_RUNLOCK() sx_sunlock(&ifnet_sxlock)
586 #define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock)
589 * Look up an ifnet given its index; the _ref variant also acquires a
590 * reference that must be freed using if_rele(). It is almost always a bug
591 * to call ifnet_byindex() instead of ifnet_byindex_ref().
593 struct ifnet *ifnet_byindex(u_short idx);
594 struct ifnet *ifnet_byindex_locked(u_short idx);
595 struct ifnet *ifnet_byindex_ref(u_short idx);
598 * Given the index, ifaddr_byindex() returns the one and only
599 * link-level ifaddr for the interface. You are not supposed to use
600 * it to traverse the list of addresses associated to the interface.
602 struct ifaddr *ifaddr_byindex(u_short idx);
604 VNET_DECLARE(struct ifnethead, ifnet);
605 VNET_DECLARE(struct ifgrouphead, ifg_head);
606 VNET_DECLARE(int, if_index);
607 VNET_DECLARE(struct ifnet *, loif); /* first loopback interface */
609 #define V_ifnet VNET(ifnet)
610 #define V_ifg_head VNET(ifg_head)
611 #define V_if_index VNET(if_index)
612 #define V_loif VNET(loif)
615 #define MCDPRINTF printf
617 #define MCDPRINTF(...)
620 int if_addgroup(struct ifnet *, const char *);
621 int if_delgroup(struct ifnet *, const char *);
622 int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
623 int if_allmulti(struct ifnet *, int);
624 struct ifnet* if_alloc(u_char);
625 void if_attach(struct ifnet *);
626 void if_dead(struct ifnet *);
627 int if_delmulti(struct ifnet *, struct sockaddr *);
628 void if_delmulti_ifma(struct ifmultiaddr *);
629 void if_delmulti_ifma_flags(struct ifmultiaddr *, int flags);
630 void if_detach(struct ifnet *);
631 void if_purgeaddrs(struct ifnet *);
632 void if_delallmulti(struct ifnet *);
633 void if_down(struct ifnet *);
635 if_findmulti(struct ifnet *, const struct sockaddr *);
636 void if_freemulti(struct ifmultiaddr *ifma);
637 void if_free(struct ifnet *);
638 void if_initname(struct ifnet *, const char *, int);
639 void if_link_state_change(struct ifnet *, int);
640 int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
641 void if_ref(struct ifnet *);
642 void if_rele(struct ifnet *);
643 int if_setlladdr(struct ifnet *, const u_char *, int);
644 void if_up(struct ifnet *);
645 int ifioctl(struct socket *, u_long, caddr_t, struct thread *);
646 int ifpromisc(struct ifnet *, int);
647 struct ifnet *ifunit(const char *);
648 struct ifnet *ifunit_ref(const char *);
650 int ifa_add_loopback_route(struct ifaddr *, struct sockaddr *);
651 int ifa_del_loopback_route(struct ifaddr *, struct sockaddr *);
652 int ifa_switch_loopback_route(struct ifaddr *, struct sockaddr *);
654 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *);
655 int ifa_ifwithaddr_check(const struct sockaddr *);
656 struct ifaddr *ifa_ifwithbroadaddr(const struct sockaddr *, int);
657 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *, int);
658 struct ifaddr *ifa_ifwithnet(const struct sockaddr *, int, int);
659 struct ifaddr *ifa_ifwithroute(int, const struct sockaddr *, struct sockaddr *,
661 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *);
662 int ifa_preferred(struct ifaddr *, struct ifaddr *);
664 int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
666 typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp);
667 typedef void if_com_free_t(void *com, u_char type);
668 void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
669 void if_deregister_com_alloc(u_char type);
670 void if_data_copy(struct ifnet *, struct if_data *);
671 uint64_t if_get_counter_default(struct ifnet *, ift_counter);
672 void if_inc_counter(struct ifnet *, ift_counter, int64_t);
674 #define IF_LLADDR(ifp) \
675 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
677 uint64_t if_setbaudrate(if_t ifp, uint64_t baudrate);
678 uint64_t if_getbaudrate(if_t ifp);
679 int if_setcapabilities(if_t ifp, int capabilities);
680 int if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit);
681 int if_getcapabilities(if_t ifp);
682 int if_togglecapenable(if_t ifp, int togglecap);
683 int if_setcapenable(if_t ifp, int capenable);
684 int if_setcapenablebit(if_t ifp, int setcap, int clearcap);
685 int if_getcapenable(if_t ifp);
686 const char *if_getdname(if_t ifp);
687 int if_setdev(if_t ifp, void *dev);
688 int if_setdrvflagbits(if_t ifp, int if_setflags, int clear_flags);
689 int if_getdrvflags(if_t ifp);
690 int if_setdrvflags(if_t ifp, int flags);
691 int if_clearhwassist(if_t ifp);
692 int if_sethwassistbits(if_t ifp, int toset, int toclear);
693 int if_sethwassist(if_t ifp, int hwassist_bit);
694 int if_gethwassist(if_t ifp);
695 int if_setsoftc(if_t ifp, void *softc);
696 void *if_getsoftc(if_t ifp);
697 int if_setflags(if_t ifp, int flags);
698 int if_gethwaddr(if_t ifp, struct ifreq *);
699 int if_setmtu(if_t ifp, int mtu);
700 int if_getmtu(if_t ifp);
701 int if_getmtu_family(if_t ifp, int family);
702 int if_setflagbits(if_t ifp, int set, int clear);
703 int if_getflags(if_t ifp);
704 int if_sendq_empty(if_t ifp);
705 int if_setsendqready(if_t ifp);
706 int if_setsendqlen(if_t ifp, int tx_desc_count);
707 int if_sethwtsomax(if_t ifp, u_int if_hw_tsomax);
708 int if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount);
709 int if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize);
710 u_int if_gethwtsomax(if_t ifp);
711 u_int if_gethwtsomaxsegcount(if_t ifp);
712 u_int if_gethwtsomaxsegsize(if_t ifp);
713 int if_input(if_t ifp, struct mbuf* sendmp);
714 int if_sendq_prepend(if_t ifp, struct mbuf *m);
715 struct mbuf *if_dequeue(if_t ifp);
716 int if_setifheaderlen(if_t ifp, int len);
717 void if_setrcvif(struct mbuf *m, if_t ifp);
718 void if_setvtag(struct mbuf *m, u_int16_t tag);
719 u_int16_t if_getvtag(struct mbuf *m);
720 int if_vlantrunkinuse(if_t ifp);
721 caddr_t if_getlladdr(if_t ifp);
722 void *if_gethandle(u_char);
723 void if_bpfmtap(if_t ifp, struct mbuf *m);
724 void if_etherbpfmtap(if_t ifp, struct mbuf *m);
725 void if_vlancap(if_t ifp);
727 int if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max);
728 int if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max);
729 int if_multiaddr_count(if_t ifp, int max);
731 int if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg);
732 int if_getamcount(if_t ifp);
733 struct ifaddr * if_getifaddr(if_t ifp);
736 void if_setinitfn(if_t ifp, void (*)(void *));
737 void if_setioctlfn(if_t ifp, int (*)(if_t, u_long, caddr_t));
738 void if_setstartfn(if_t ifp, void (*)(if_t));
739 void if_settransmitfn(if_t ifp, if_transmit_fn_t);
740 void if_setqflushfn(if_t ifp, if_qflush_fn_t);
741 void if_setgetcounterfn(if_t ifp, if_get_counter_t);
743 /* Revisit the below. These are inline functions originally */
744 int drbr_inuse_drv(if_t ifp, struct buf_ring *br);
745 struct mbuf* drbr_dequeue_drv(if_t ifp, struct buf_ring *br);
746 int drbr_needs_enqueue_drv(if_t ifp, struct buf_ring *br);
747 int drbr_enqueue_drv(if_t ifp, struct buf_ring *br, struct mbuf *m);
750 void if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *);
751 int if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *);
753 /* accessors for struct ifreq */
754 void *ifr_data_get_ptr(void *ifrp);
756 #ifdef DEVICE_POLLING
757 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS };
759 typedef int poll_handler_t(if_t ifp, enum poll_cmd cmd, int count);
760 int ether_poll_register(poll_handler_t *h, if_t ifp);
761 int ether_poll_deregister(if_t ifp);
762 #endif /* DEVICE_POLLING */
766 #include <net/ifq.h> /* XXXAO: temporary unconditional include */
768 #endif /* !_NET_IF_VAR_H_ */