| 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: src/sys/net/if_var.h,v 1.18.2.16 2003/04/15 18:11:19 fjoe Exp $ |
| 35 | */ |
| 36 | |
| 37 | #ifndef _NET_IF_VAR_H_ |
| 38 | #define _NET_IF_VAR_H_ |
| 39 | |
| 40 | #ifndef _SYS_SERIALIZE_H_ |
| 41 | #include <sys/serialize.h> |
| 42 | #endif |
| 43 | #ifndef _NET_IF_H_ |
| 44 | #include <net/if.h> |
| 45 | #endif |
| 46 | #ifndef _SYS_MUTEX_H_ |
| 47 | #include <sys/mutex.h> |
| 48 | #endif |
| 49 | |
| 50 | /* |
| 51 | * Structures defining a network interface, providing a packet |
| 52 | * transport mechanism (ala level 0 of the PUP protocols). |
| 53 | * |
| 54 | * Each interface accepts output datagrams of a specified maximum |
| 55 | * length, and provides higher level routines with input datagrams |
| 56 | * received from its medium. |
| 57 | * |
| 58 | * Output occurs when the routine if_output is called, with four parameters: |
| 59 | * ifp->if_output(ifp, m, dst, rt) |
| 60 | * Here m is the mbuf chain to be sent and dst is the destination address. |
| 61 | * The output routine encapsulates the supplied datagram if necessary, |
| 62 | * and then transmits it on its medium. |
| 63 | * |
| 64 | * On input, each interface unwraps the data received by it, and either |
| 65 | * places it on the input queue of a internetwork datagram routine |
| 66 | * and posts the associated software interrupt, or passes the datagram to |
| 67 | * the routine if_input. It is called with the mbuf chain as parameter: |
| 68 | * ifp->if_input(ifp, m) |
| 69 | * The input routine removes the protocol dependent header if necessary. |
| 70 | * |
| 71 | * Routines exist for locating interfaces by their addresses |
| 72 | * or for locating a interface on a certain network, as well as more general |
| 73 | * routing and gateway routines maintaining information used to locate |
| 74 | * interfaces. These routines live in the files if.c and route.c |
| 75 | */ |
| 76 | |
| 77 | /* |
| 78 | * Forward structure declarations for function prototypes [sic]. |
| 79 | */ |
| 80 | struct mbuf; |
| 81 | struct proc; |
| 82 | struct rtentry; |
| 83 | struct rt_addrinfo; |
| 84 | struct socket; |
| 85 | struct ether_header; |
| 86 | struct ucred; |
| 87 | struct lwkt_serialize; |
| 88 | struct ifaddr_container; |
| 89 | struct ifaddr; |
| 90 | struct lwkt_port; |
| 91 | struct lwkt_msg; |
| 92 | union netmsg; |
| 93 | struct pktinfo; |
| 94 | struct ifpoll_info; |
| 95 | |
| 96 | #include <sys/queue.h> /* get TAILQ macros */ |
| 97 | |
| 98 | #include <net/altq/if_altq.h> |
| 99 | |
| 100 | #ifdef _KERNEL |
| 101 | #include <sys/eventhandler.h> |
| 102 | #include <sys/mbuf.h> |
| 103 | #include <sys/systm.h> /* XXX */ |
| 104 | #include <sys/thread2.h> |
| 105 | #endif /* _KERNEL */ |
| 106 | |
| 107 | #define IF_DUNIT_NONE -1 |
| 108 | |
| 109 | TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ |
| 110 | TAILQ_HEAD(ifaddrhead, ifaddr_container); /* instantiation is preserved in the list */ |
| 111 | TAILQ_HEAD(ifprefixhead, ifprefix); |
| 112 | TAILQ_HEAD(ifmultihead, ifmultiaddr); |
| 113 | |
| 114 | /* |
| 115 | * Structure defining a queue for a network interface. |
| 116 | */ |
| 117 | struct ifqueue { |
| 118 | struct mbuf *ifq_head; |
| 119 | struct mbuf *ifq_tail; |
| 120 | int ifq_len; |
| 121 | int ifq_maxlen; |
| 122 | int ifq_drops; |
| 123 | }; |
| 124 | |
| 125 | /* |
| 126 | * Note of IFPOLL_ENABLE |
| 127 | * 1) Any file(*.c) that depends on IFPOLL_ENABLE supports in this |
| 128 | * file should include opt_ifpoll.h at its beginning. |
| 129 | * 2) When struct changes, which are conditioned by IFPOLL_ENABLE, |
| 130 | * are to be introduced, please keep the struct's size and layout |
| 131 | * same, no matter whether IFPOLL_ENABLE is defined or not. |
| 132 | * See ifnet.if_npoll and ifnet.if_npoll_unused for example. |
| 133 | */ |
| 134 | |
| 135 | enum ifnet_serialize { |
| 136 | IFNET_SERIALIZE_ALL, |
| 137 | IFNET_SERIALIZE_MAIN, |
| 138 | IFNET_SERIALIZE_TX_BASE = 0x10000000, |
| 139 | IFNET_SERIALIZE_RX_BASE = 0x20000000 |
| 140 | }; |
| 141 | #define IFNET_SERIALIZE_TX(i) (IFNET_SERIALIZE_TX_BASE + (i)) |
| 142 | #define IFNET_SERIALIZE_RX(i) (IFNET_SERIALIZE_RX_BASE + (i)) |
| 143 | |
| 144 | #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) |
| 145 | |
| 146 | /* |
| 147 | * Structure defining a network interface. |
| 148 | * |
| 149 | * (Would like to call this struct ``if'', but C isn't PL/1.) |
| 150 | */ |
| 151 | |
| 152 | /* |
| 153 | * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with |
| 154 | * one of these structures, typically held within an arpcom structure. |
| 155 | * |
| 156 | * struct <foo>_softc { |
| 157 | * struct arpcom { |
| 158 | * struct ifnet ac_if; |
| 159 | * ... |
| 160 | * } <arpcom> ; |
| 161 | * ... |
| 162 | * }; |
| 163 | * |
| 164 | * The assumption is used in a number of places, including many |
| 165 | * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). |
| 166 | * |
| 167 | * Unfortunately devices' softc are opaque, so we depend on this layout |
| 168 | * to locate the struct ifnet from the softc in the generic code. |
| 169 | * |
| 170 | * MPSAFE NOTES: |
| 171 | * |
| 172 | * ifnet is protected by calling if_serialize, if_tryserialize and |
| 173 | * if_deserialize serialize functions with the ifnet_serialize parameter. |
| 174 | * ifnet.if_snd is protected by its own spinlock. Callers of if_ioctl, |
| 175 | * if_watchdog, if_init, if_resolvemulti, and if_poll should call the |
| 176 | * ifnet serialize functions with IFNET_SERIALIZE_ALL. Callers of if_start |
| 177 | * sould call the ifnet serialize functions with IFNET_SERIALIZE_TX. |
| 178 | * |
| 179 | * FIXME: Device drivers usually use the same serializer for their interrupt |
| 180 | * FIXME: but this is not required. |
| 181 | * |
| 182 | * Caller of if_output must not serialize ifnet by calling ifnet serialize |
| 183 | * functions; if_output will call the ifnet serialize functions based on |
| 184 | * its own needs. Caller of if_input does not necessarily hold the related |
| 185 | * serializer. |
| 186 | * |
| 187 | * If a device driver installs the same serializer for its interrupt |
| 188 | * as for ifnet, then the driver only really needs to worry about further |
| 189 | * serialization in timeout based entry points. All other entry points |
| 190 | * will already be serialized. Older ISA drivers still using the old |
| 191 | * interrupt infrastructure will have to obtain and release the serializer |
| 192 | * in their interrupt routine themselves. |
| 193 | */ |
| 194 | struct ifnet { |
| 195 | void *if_softc; /* pointer to driver state */ |
| 196 | void *if_l2com; /* pointer to protocol bits */ |
| 197 | TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ |
| 198 | char if_xname[IFNAMSIZ]; /* external name (name + unit) */ |
| 199 | const char *if_dname; /* driver name */ |
| 200 | int if_dunit; /* unit or IF_DUNIT_NONE */ |
| 201 | void *if_vlantrunks; /* vlan trunks */ |
| 202 | struct ifaddrhead *if_addrheads; /* array[NCPU] of TAILQs of addresses per if */ |
| 203 | int if_pcount; /* number of promiscuous listeners */ |
| 204 | void *if_carp; /* carp interfaces */ |
| 205 | struct bpf_if *if_bpf; /* packet filter structure */ |
| 206 | u_short if_index; /* numeric abbreviation for this if */ |
| 207 | short if_timer; /* time 'til if_watchdog called */ |
| 208 | int if_flags; /* up/down, broadcast, etc. */ |
| 209 | int if_capabilities; /* interface capabilities */ |
| 210 | int if_capenable; /* enabled features */ |
| 211 | void *if_linkmib; /* link-type-specific MIB data */ |
| 212 | size_t if_linkmiblen; /* length of above data */ |
| 213 | struct if_data if_data; |
| 214 | struct ifmultihead if_multiaddrs; /* multicast addresses configured */ |
| 215 | int if_amcount; /* number of all-multicast requests */ |
| 216 | /* procedure handles */ |
| 217 | int (*if_output) /* output routine (enqueue) */ |
| 218 | (struct ifnet *, struct mbuf *, struct sockaddr *, |
| 219 | struct rtentry *); |
| 220 | void (*if_input) /* input routine from hardware driver */ |
| 221 | (struct ifnet *, struct mbuf *); |
| 222 | void (*if_start) /* initiate output routine */ |
| 223 | (struct ifnet *, struct ifaltq_subque *); |
| 224 | int (*if_ioctl) /* ioctl routine */ |
| 225 | (struct ifnet *, u_long, caddr_t, struct ucred *); |
| 226 | void (*if_watchdog) /* timer routine */ |
| 227 | (struct ifnet *); |
| 228 | void (*if_init) /* Init routine */ |
| 229 | (void *); |
| 230 | int (*if_resolvemulti) /* validate/resolve multicast */ |
| 231 | (struct ifnet *, struct sockaddr **, struct sockaddr *); |
| 232 | void *if_unused5; |
| 233 | TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */ |
| 234 | int (*if_mapsubq) |
| 235 | (struct ifaltq *, int); |
| 236 | int if_unused2; |
| 237 | void (*if_serialize) |
| 238 | (struct ifnet *, enum ifnet_serialize); |
| 239 | void (*if_deserialize) |
| 240 | (struct ifnet *, enum ifnet_serialize); |
| 241 | int (*if_tryserialize) |
| 242 | (struct ifnet *, enum ifnet_serialize); |
| 243 | #ifdef INVARIANTS |
| 244 | void (*if_serialize_assert) |
| 245 | (struct ifnet *, enum ifnet_serialize, boolean_t); |
| 246 | #else |
| 247 | /* Place holder */ |
| 248 | void (*if_serialize_unused)(void); |
| 249 | #endif |
| 250 | #ifdef IFPOLL_ENABLE |
| 251 | void (*if_npoll) |
| 252 | (struct ifnet *, struct ifpoll_info *); |
| 253 | #else |
| 254 | /* Place holder */ |
| 255 | void (*if_npoll_unused)(void); |
| 256 | #endif |
| 257 | int if_unused3; |
| 258 | struct ifaltq if_snd; /* output queue (includes altq) */ |
| 259 | struct ifprefixhead if_prefixhead; /* list of prefixes per if */ |
| 260 | const uint8_t *if_broadcastaddr; |
| 261 | void *if_bridge; /* bridge glue */ |
| 262 | void *if_afdata[AF_MAX]; |
| 263 | struct ifaddr *if_lladdr; |
| 264 | struct lwkt_serialize *if_serializer; /* serializer or MP lock */ |
| 265 | struct lwkt_serialize if_default_serializer; /* if not supplied */ |
| 266 | struct mtx if_ioctl_mtx; /* high-level ioctl serializing mutex */ |
| 267 | int if_unused4; |
| 268 | void *if_unused6; |
| 269 | void *if_pf_kif; /* pf interface abstraction */ |
| 270 | void *if_unused7; |
| 271 | }; |
| 272 | typedef void if_init_f_t (void *); |
| 273 | |
| 274 | #define if_mtu if_data.ifi_mtu |
| 275 | #define if_type if_data.ifi_type |
| 276 | #define if_physical if_data.ifi_physical |
| 277 | #define if_addrlen if_data.ifi_addrlen |
| 278 | #define if_hdrlen if_data.ifi_hdrlen |
| 279 | #define if_metric if_data.ifi_metric |
| 280 | #define if_link_state if_data.ifi_link_state |
| 281 | #define if_baudrate if_data.ifi_baudrate |
| 282 | #define if_hwassist if_data.ifi_hwassist |
| 283 | #define if_ipackets if_data.ifi_ipackets |
| 284 | #define if_ierrors if_data.ifi_ierrors |
| 285 | #define if_opackets if_data.ifi_opackets |
| 286 | #define if_oerrors if_data.ifi_oerrors |
| 287 | #define if_collisions if_data.ifi_collisions |
| 288 | #define if_ibytes if_data.ifi_ibytes |
| 289 | #define if_obytes if_data.ifi_obytes |
| 290 | #define if_imcasts if_data.ifi_imcasts |
| 291 | #define if_omcasts if_data.ifi_omcasts |
| 292 | #define if_iqdrops if_data.ifi_iqdrops |
| 293 | #define if_noproto if_data.ifi_noproto |
| 294 | #define if_lastchange if_data.ifi_lastchange |
| 295 | #define if_recvquota if_data.ifi_recvquota |
| 296 | #define if_xmitquota if_data.ifi_xmitquota |
| 297 | #define if_rawoutput(if, m, sa) if_output(if, m, sa, NULL) |
| 298 | |
| 299 | /* for compatibility with other BSDs */ |
| 300 | #define if_list if_link |
| 301 | |
| 302 | #endif |
| 303 | |
| 304 | /* |
| 305 | * Device private output queues and input queues are queues of messages |
| 306 | * stored on ifqueue structures (defined above). Entries are added to |
| 307 | * and deleted from these structures by these macros. |
| 308 | */ |
| 309 | #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) |
| 310 | #define IF_DROP(ifq) ((ifq)->ifq_drops++) |
| 311 | #define IF_QLEN(ifq) ((ifq)->ifq_len) |
| 312 | #define IF_QEMPTY(ifq) (IF_QLEN(ifq) == 0) |
| 313 | |
| 314 | #define IF_ENQUEUE(ifq, m) do { \ |
| 315 | (m)->m_nextpkt = NULL; \ |
| 316 | if ((ifq)->ifq_tail == NULL) \ |
| 317 | (ifq)->ifq_head = m; \ |
| 318 | else \ |
| 319 | (ifq)->ifq_tail->m_nextpkt = m; \ |
| 320 | (ifq)->ifq_tail = m; \ |
| 321 | (ifq)->ifq_len++; \ |
| 322 | } while (0) |
| 323 | |
| 324 | #define IF_PREPEND(ifq, m) do { \ |
| 325 | (m)->m_nextpkt = (ifq)->ifq_head; \ |
| 326 | if ((ifq)->ifq_tail == NULL) \ |
| 327 | (ifq)->ifq_tail = (m); \ |
| 328 | (ifq)->ifq_head = (m); \ |
| 329 | (ifq)->ifq_len++; \ |
| 330 | } while (0) |
| 331 | |
| 332 | #define IF_DEQUEUE(ifq, m) do { \ |
| 333 | (m) = (ifq)->ifq_head; \ |
| 334 | if (m) { \ |
| 335 | if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \ |
| 336 | (ifq)->ifq_tail = NULL; \ |
| 337 | (m)->m_nextpkt = NULL; \ |
| 338 | (ifq)->ifq_len--; \ |
| 339 | } \ |
| 340 | } while (0) |
| 341 | |
| 342 | #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) |
| 343 | |
| 344 | #define IF_DRAIN(ifq) do { \ |
| 345 | struct mbuf *m; \ |
| 346 | while (1) { \ |
| 347 | IF_DEQUEUE(ifq, m); \ |
| 348 | if (m == NULL) \ |
| 349 | break; \ |
| 350 | m_freem(m); \ |
| 351 | } \ |
| 352 | } while (0) |
| 353 | |
| 354 | #ifdef _KERNEL |
| 355 | |
| 356 | /* interface link layer address change event */ |
| 357 | typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *); |
| 358 | EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t); |
| 359 | |
| 360 | #ifdef INVARIANTS |
| 361 | #define ASSERT_IFNET_SERIALIZED_ALL(ifp) \ |
| 362 | (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, TRUE) |
| 363 | #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) \ |
| 364 | (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, FALSE) |
| 365 | |
| 366 | #define ASSERT_IFNET_SERIALIZED_TX(ifp, ifsq) \ |
| 367 | (ifp)->if_serialize_assert((ifp), \ |
| 368 | IFNET_SERIALIZE_TX((ifsq)->ifsq_index), TRUE) |
| 369 | #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp, ifsq) \ |
| 370 | (ifp)->if_serialize_assert((ifp), \ |
| 371 | IFNET_SERIALIZE_TX((ifsq)->ifsq_index), FALSE) |
| 372 | |
| 373 | #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) \ |
| 374 | (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, TRUE) |
| 375 | #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) \ |
| 376 | (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, FALSE) |
| 377 | #else |
| 378 | #define ASSERT_IFNET_SERIALIZED_ALL(ifp) ((void)0) |
| 379 | #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) ((void)0) |
| 380 | #define ASSERT_IFNET_SERIALIZED_TX(ifp, ifsq) ((void)0) |
| 381 | #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp, ifsq) ((void)0) |
| 382 | #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) ((void)0) |
| 383 | #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) ((void)0) |
| 384 | #endif |
| 385 | |
| 386 | static __inline void |
| 387 | ifnet_serialize_all(struct ifnet *_ifp) |
| 388 | { |
| 389 | _ifp->if_serialize(_ifp, IFNET_SERIALIZE_ALL); |
| 390 | } |
| 391 | |
| 392 | static __inline void |
| 393 | ifnet_deserialize_all(struct ifnet *_ifp) |
| 394 | { |
| 395 | _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_ALL); |
| 396 | } |
| 397 | |
| 398 | static __inline int |
| 399 | ifnet_tryserialize_all(struct ifnet *_ifp) |
| 400 | { |
| 401 | return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_ALL); |
| 402 | } |
| 403 | |
| 404 | static __inline void |
| 405 | ifnet_serialize_tx(struct ifnet *_ifp, const struct ifaltq_subque *_ifsq) |
| 406 | { |
| 407 | _ifp->if_serialize(_ifp, IFNET_SERIALIZE_TX(_ifsq->ifsq_index)); |
| 408 | } |
| 409 | |
| 410 | static __inline void |
| 411 | ifnet_deserialize_tx(struct ifnet *_ifp, const struct ifaltq_subque *_ifsq) |
| 412 | { |
| 413 | _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_TX(_ifsq->ifsq_index)); |
| 414 | } |
| 415 | |
| 416 | static __inline int |
| 417 | ifnet_tryserialize_tx(struct ifnet *_ifp, const struct ifaltq_subque *_ifsq) |
| 418 | { |
| 419 | return _ifp->if_tryserialize(_ifp, |
| 420 | IFNET_SERIALIZE_TX(_ifsq->ifsq_index)); |
| 421 | } |
| 422 | |
| 423 | static __inline void |
| 424 | ifnet_serialize_main(struct ifnet *_ifp) |
| 425 | { |
| 426 | _ifp->if_serialize(_ifp, IFNET_SERIALIZE_MAIN); |
| 427 | } |
| 428 | |
| 429 | static __inline void |
| 430 | ifnet_deserialize_main(struct ifnet *_ifp) |
| 431 | { |
| 432 | _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_MAIN); |
| 433 | } |
| 434 | |
| 435 | static __inline int |
| 436 | ifnet_tryserialize_main(struct ifnet *_ifp) |
| 437 | { |
| 438 | return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_MAIN); |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * 72 was chosen below because it is the size of a TCP/IP |
| 443 | * header (40) + the minimum mss (32). |
| 444 | */ |
| 445 | #define IF_MINMTU 72 |
| 446 | #define IF_MAXMTU 65535 |
| 447 | |
| 448 | #endif /* _KERNEL */ |
| 449 | |
| 450 | struct in_ifaddr; |
| 451 | |
| 452 | struct in_ifaddr_container { |
| 453 | struct in_ifaddr *ia; |
| 454 | LIST_ENTRY(in_ifaddr_container) ia_hash; |
| 455 | /* entry in bucket of inet addresses */ |
| 456 | TAILQ_ENTRY(in_ifaddr_container) ia_link; |
| 457 | /* list of internet addresses */ |
| 458 | struct ifaddr_container *ia_ifac; /* parent ifaddr_container */ |
| 459 | }; |
| 460 | |
| 461 | struct ifaddr_container { |
| 462 | #define IFA_CONTAINER_MAGIC 0x19810219 |
| 463 | #define IFA_CONTAINER_DEAD 0xc0dedead |
| 464 | uint32_t ifa_magic; /* IFA_CONTAINER_MAGIC */ |
| 465 | struct ifaddr *ifa; |
| 466 | TAILQ_ENTRY(ifaddr_container) ifa_link; /* queue macro glue */ |
| 467 | u_int ifa_refcnt; /* references to this structure */ |
| 468 | uint16_t ifa_listmask; /* IFA_LIST_ */ |
| 469 | uint16_t ifa_prflags; /* protocol specific flags */ |
| 470 | |
| 471 | /* |
| 472 | * Protocol specific states |
| 473 | */ |
| 474 | union { |
| 475 | struct in_ifaddr_container u_in_ifac; |
| 476 | } ifa_proto_u; |
| 477 | }; |
| 478 | |
| 479 | #define IFA_LIST_IFADDRHEAD 0x01 /* on ifnet.if_addrheads[cpuid] */ |
| 480 | #define IFA_LIST_IN_IFADDRHEAD 0x02 /* on in_ifaddrheads[cpuid] */ |
| 481 | #define IFA_LIST_IN_IFADDRHASH 0x04 /* on in_ifaddrhashtbls[cpuid] */ |
| 482 | |
| 483 | #define IFA_PRF_FLAG0 0x01 |
| 484 | #define IFA_PRF_FLAG1 0x02 |
| 485 | #define IFA_PRF_FLAG2 0x04 |
| 486 | #define IFA_PRF_FLAG3 0x08 |
| 487 | |
| 488 | /* |
| 489 | * The ifaddr structure contains information about one address |
| 490 | * of an interface. They are maintained by the different address families, |
| 491 | * are allocated and attached when an address is set, and are linked |
| 492 | * together so all addresses for an interface can be located. |
| 493 | */ |
| 494 | struct ifaddr { |
| 495 | struct sockaddr *ifa_addr; /* address of interface */ |
| 496 | struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ |
| 497 | #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ |
| 498 | struct sockaddr *ifa_netmask; /* used to determine subnet */ |
| 499 | struct if_data if_data; /* not all members are meaningful */ |
| 500 | struct ifnet *ifa_ifp; /* back-pointer to interface */ |
| 501 | void *ifa_link_pad; |
| 502 | struct ifaddr_container *ifa_containers; |
| 503 | void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ |
| 504 | (int, struct rtentry *, struct rt_addrinfo *); |
| 505 | u_short ifa_flags; /* mostly rt_flags for cloning */ |
| 506 | int ifa_ncnt; /* # of valid ifaddr_container */ |
| 507 | int ifa_metric; /* cost of going out this interface */ |
| 508 | #ifdef notdef |
| 509 | struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ |
| 510 | #endif |
| 511 | int (*ifa_claim_addr) /* check if an addr goes to this if */ |
| 512 | (struct ifaddr *, struct sockaddr *); |
| 513 | |
| 514 | }; |
| 515 | #define IFA_ROUTE RTF_UP /* route installed */ |
| 516 | |
| 517 | /* for compatibility with other BSDs */ |
| 518 | #define ifa_list ifa_link |
| 519 | |
| 520 | /* |
| 521 | * The prefix structure contains information about one prefix |
| 522 | * of an interface. They are maintained by the different address families, |
| 523 | * are allocated and attached when an prefix or an address is set, |
| 524 | * and are linked together so all prefixes for an interface can be located. |
| 525 | */ |
| 526 | struct ifprefix { |
| 527 | struct sockaddr *ifpr_prefix; /* prefix of interface */ |
| 528 | struct ifnet *ifpr_ifp; /* back-pointer to interface */ |
| 529 | TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ |
| 530 | u_char ifpr_plen; /* prefix length in bits */ |
| 531 | u_char ifpr_type; /* protocol dependent prefix type */ |
| 532 | }; |
| 533 | |
| 534 | /* |
| 535 | * Multicast address structure. This is analogous to the ifaddr |
| 536 | * structure except that it keeps track of multicast addresses. |
| 537 | * Also, the reference count here is a count of requests for this |
| 538 | * address, not a count of pointers to this structure. |
| 539 | */ |
| 540 | struct ifmultiaddr { |
| 541 | TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ |
| 542 | struct sockaddr *ifma_addr; /* address this membership is for */ |
| 543 | struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ |
| 544 | struct ifnet *ifma_ifp; /* back-pointer to interface */ |
| 545 | u_int ifma_refcount; /* reference count */ |
| 546 | void *ifma_protospec; /* protocol-specific state, if any */ |
| 547 | }; |
| 548 | |
| 549 | #ifdef _KERNEL |
| 550 | |
| 551 | #ifndef _SYS_SERIALIZE2_H_ |
| 552 | #include <sys/serialize2.h> |
| 553 | #endif |
| 554 | |
| 555 | enum ifaddr_event { |
| 556 | IFADDR_EVENT_ADD, |
| 557 | IFADDR_EVENT_DELETE, |
| 558 | IFADDR_EVENT_CHANGE |
| 559 | }; |
| 560 | |
| 561 | /* interface address change event */ |
| 562 | typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *, |
| 563 | enum ifaddr_event, struct ifaddr *); |
| 564 | EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); |
| 565 | /* new interface attach event */ |
| 566 | typedef void (*ifnet_attach_event_handler_t)(void *, struct ifnet *); |
| 567 | EVENTHANDLER_DECLARE(ifnet_attach_event, ifnet_attach_event_handler_t); |
| 568 | /* interface detach event */ |
| 569 | typedef void (*ifnet_detach_event_handler_t)(void *, struct ifnet *); |
| 570 | EVENTHANDLER_DECLARE(ifnet_detach_event, ifnet_detach_event_handler_t); |
| 571 | |
| 572 | /* |
| 573 | * interface groups |
| 574 | */ |
| 575 | struct ifg_group { |
| 576 | char ifg_group[IFNAMSIZ]; |
| 577 | u_int ifg_refcnt; |
| 578 | void *ifg_pf_kif; |
| 579 | int ifg_carp_demoted; |
| 580 | TAILQ_HEAD(, ifg_member) ifg_members; |
| 581 | TAILQ_ENTRY(ifg_group) ifg_next; |
| 582 | }; |
| 583 | |
| 584 | struct ifg_member { |
| 585 | TAILQ_ENTRY(ifg_member) ifgm_next; |
| 586 | struct ifnet *ifgm_ifp; |
| 587 | }; |
| 588 | |
| 589 | struct ifg_list { |
| 590 | struct ifg_group *ifgl_group; |
| 591 | TAILQ_ENTRY(ifg_list) ifgl_next; |
| 592 | }; |
| 593 | |
| 594 | /* group attach event */ |
| 595 | typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *); |
| 596 | EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t); |
| 597 | /* group detach event */ |
| 598 | typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *); |
| 599 | EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t); |
| 600 | /* group change event */ |
| 601 | typedef void (*group_change_event_handler_t)(void *, const char *); |
| 602 | EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t); |
| 603 | |
| 604 | |
| 605 | #ifdef INVARIANTS |
| 606 | #define ASSERT_IFAC_VALID(ifac) do { \ |
| 607 | KKASSERT((ifac)->ifa_magic == IFA_CONTAINER_MAGIC); \ |
| 608 | KKASSERT((ifac)->ifa_refcnt > 0); \ |
| 609 | } while (0) |
| 610 | #else |
| 611 | #define ASSERT_IFAC_VALID(ifac) ((void)0) |
| 612 | #endif |
| 613 | |
| 614 | static __inline void |
| 615 | _IFAREF(struct ifaddr *_ifa, int _cpu_id) |
| 616 | { |
| 617 | struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; |
| 618 | |
| 619 | crit_enter(); |
| 620 | ASSERT_IFAC_VALID(_ifac); |
| 621 | ++_ifac->ifa_refcnt; |
| 622 | crit_exit(); |
| 623 | } |
| 624 | |
| 625 | static __inline void |
| 626 | IFAREF(struct ifaddr *_ifa) |
| 627 | { |
| 628 | _IFAREF(_ifa, mycpuid); |
| 629 | } |
| 630 | |
| 631 | #include <sys/malloc.h> |
| 632 | |
| 633 | MALLOC_DECLARE(M_IFADDR); |
| 634 | MALLOC_DECLARE(M_IFMADDR); |
| 635 | MALLOC_DECLARE(M_IFNET); |
| 636 | |
| 637 | void ifac_free(struct ifaddr_container *, int); |
| 638 | |
| 639 | static __inline void |
| 640 | _IFAFREE(struct ifaddr *_ifa, int _cpu_id) |
| 641 | { |
| 642 | struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; |
| 643 | |
| 644 | crit_enter(); |
| 645 | ASSERT_IFAC_VALID(_ifac); |
| 646 | if (--_ifac->ifa_refcnt == 0) |
| 647 | ifac_free(_ifac, _cpu_id); |
| 648 | crit_exit(); |
| 649 | } |
| 650 | |
| 651 | static __inline void |
| 652 | IFAFREE(struct ifaddr *_ifa) |
| 653 | { |
| 654 | _IFAFREE(_ifa, mycpuid); |
| 655 | } |
| 656 | |
| 657 | struct lwkt_port *ifnet_portfn(int); |
| 658 | int ifnet_domsg(struct lwkt_msg *, int); |
| 659 | void ifnet_sendmsg(struct lwkt_msg *, int); |
| 660 | void ifnet_forwardmsg(struct lwkt_msg *, int); |
| 661 | struct ifnet *ifnet_byindex(unsigned short); |
| 662 | |
| 663 | static __inline int |
| 664 | ifa_domsg(struct lwkt_msg *_lmsg, int _cpu) |
| 665 | { |
| 666 | return ifnet_domsg(_lmsg, _cpu); |
| 667 | } |
| 668 | |
| 669 | static __inline void |
| 670 | ifa_sendmsg(struct lwkt_msg *_lmsg, int _cpu) |
| 671 | { |
| 672 | ifnet_sendmsg(_lmsg, _cpu); |
| 673 | } |
| 674 | |
| 675 | static __inline void |
| 676 | ifa_forwardmsg(struct lwkt_msg *_lmsg, int _nextcpu) |
| 677 | { |
| 678 | ifnet_forwardmsg(_lmsg, _nextcpu); |
| 679 | } |
| 680 | |
| 681 | static __inline int |
| 682 | ifnet_serialize_array_index(int _arrcnt, int _txoff, int _rxoff, |
| 683 | enum ifnet_serialize _slz) |
| 684 | { |
| 685 | int _off; |
| 686 | |
| 687 | if (_slz == IFNET_SERIALIZE_MAIN) { |
| 688 | _off = 0; |
| 689 | } else if (_slz & IFNET_SERIALIZE_TX_BASE) { |
| 690 | _off = (_slz & ~IFNET_SERIALIZE_TX_BASE) + _txoff; |
| 691 | KASSERT(_off < _arrcnt, |
| 692 | ("invalid TX serializer %#x", _slz)); |
| 693 | } else if (_slz & IFNET_SERIALIZE_RX_BASE) { |
| 694 | _off = (_slz & ~IFNET_SERIALIZE_RX_BASE) + _rxoff; |
| 695 | KASSERT(_off < _arrcnt, |
| 696 | ("invalid RX serializer %#x", _slz)); |
| 697 | } else { |
| 698 | panic("unknown serializer %#x", _slz); |
| 699 | } |
| 700 | return _off; |
| 701 | } |
| 702 | |
| 703 | static __inline void |
| 704 | ifnet_serialize_array_enter(lwkt_serialize_t *_arr, int _arrcnt, |
| 705 | int _txoff, int _rxoff, enum ifnet_serialize _slz) |
| 706 | { |
| 707 | int _off; |
| 708 | |
| 709 | if (_slz == IFNET_SERIALIZE_ALL) { |
| 710 | lwkt_serialize_array_enter(_arr, _arrcnt, 0); |
| 711 | return; |
| 712 | } |
| 713 | |
| 714 | _off = ifnet_serialize_array_index(_arrcnt, _txoff, _rxoff, _slz); |
| 715 | lwkt_serialize_enter(_arr[_off]); |
| 716 | } |
| 717 | |
| 718 | static __inline void |
| 719 | ifnet_serialize_array_exit(lwkt_serialize_t *_arr, int _arrcnt, |
| 720 | int _txoff, int _rxoff, enum ifnet_serialize _slz) |
| 721 | { |
| 722 | int _off; |
| 723 | |
| 724 | if (_slz == IFNET_SERIALIZE_ALL) { |
| 725 | lwkt_serialize_array_exit(_arr, _arrcnt, 0); |
| 726 | return; |
| 727 | } |
| 728 | |
| 729 | _off = ifnet_serialize_array_index(_arrcnt, _txoff, _rxoff, _slz); |
| 730 | lwkt_serialize_exit(_arr[_off]); |
| 731 | } |
| 732 | |
| 733 | static __inline int |
| 734 | ifnet_serialize_array_try(lwkt_serialize_t *_arr, int _arrcnt, |
| 735 | int _txoff, int _rxoff, enum ifnet_serialize _slz) |
| 736 | { |
| 737 | int _off; |
| 738 | |
| 739 | if (_slz == IFNET_SERIALIZE_ALL) |
| 740 | return lwkt_serialize_array_try(_arr, _arrcnt, 0); |
| 741 | |
| 742 | _off = ifnet_serialize_array_index(_arrcnt, _txoff, _rxoff, _slz); |
| 743 | return lwkt_serialize_try(_arr[_off]); |
| 744 | } |
| 745 | |
| 746 | #ifdef INVARIANTS |
| 747 | |
| 748 | static __inline void |
| 749 | ifnet_serialize_array_assert(lwkt_serialize_t *_arr, int _arrcnt, |
| 750 | int _txoff, int _rxoff, enum ifnet_serialize _slz, boolean_t _serialized) |
| 751 | { |
| 752 | int _off; |
| 753 | |
| 754 | if (_slz == IFNET_SERIALIZE_ALL) { |
| 755 | int _i; |
| 756 | |
| 757 | if (_serialized) { |
| 758 | for (_i = 0; _i < _arrcnt; ++_i) |
| 759 | ASSERT_SERIALIZED(_arr[_i]); |
| 760 | } else { |
| 761 | for (_i = 0; _i < _arrcnt; ++_i) |
| 762 | ASSERT_NOT_SERIALIZED(_arr[_i]); |
| 763 | } |
| 764 | return; |
| 765 | } |
| 766 | |
| 767 | _off = ifnet_serialize_array_index(_arrcnt, _txoff, _rxoff, _slz); |
| 768 | if (_serialized) |
| 769 | ASSERT_SERIALIZED(_arr[_off]); |
| 770 | else |
| 771 | ASSERT_NOT_SERIALIZED(_arr[_off]); |
| 772 | } |
| 773 | |
| 774 | #endif /* INVARIANTS */ |
| 775 | |
| 776 | #define REINPUT_KEEPRCVIF 0x0001 /* ether_reinput_oncpu() */ |
| 777 | #define REINPUT_RUNBPF 0x0002 /* ether_reinput_oncpu() */ |
| 778 | |
| 779 | extern struct ifnethead ifnet; |
| 780 | extern struct ifnet **ifindex2ifnet; |
| 781 | extern int ifqmaxlen; |
| 782 | extern struct ifnet loif[]; |
| 783 | extern int if_index; |
| 784 | |
| 785 | struct ip; |
| 786 | struct tcphdr; |
| 787 | |
| 788 | void ether_ifattach(struct ifnet *, uint8_t *, struct lwkt_serialize *); |
| 789 | void ether_ifattach_bpf(struct ifnet *, uint8_t *, u_int, u_int, |
| 790 | struct lwkt_serialize *); |
| 791 | void ether_ifdetach(struct ifnet *); |
| 792 | void ether_demux(struct mbuf *); |
| 793 | void ether_demux_oncpu(struct ifnet *, struct mbuf *); |
| 794 | void ether_reinput_oncpu(struct ifnet *, struct mbuf *, int); |
| 795 | void ether_input_pkt(struct ifnet *, struct mbuf *, const struct pktinfo *); |
| 796 | int ether_output_frame(struct ifnet *, struct mbuf *); |
| 797 | int ether_ioctl(struct ifnet *, u_long, caddr_t); |
| 798 | boolean_t ether_tso_pullup(struct mbuf **, int *, struct ip **, int *, |
| 799 | struct tcphdr **, int *); |
| 800 | struct ifnet *ether_bridge_interface(struct ifnet *ifp); |
| 801 | uint32_t ether_crc32_le(const uint8_t *, size_t); |
| 802 | uint32_t ether_crc32_be(const uint8_t *, size_t); |
| 803 | |
| 804 | int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); |
| 805 | int if_allmulti(struct ifnet *, int); |
| 806 | void if_attach(struct ifnet *, struct lwkt_serialize *); |
| 807 | int if_delmulti(struct ifnet *, struct sockaddr *); |
| 808 | void if_delallmulti(struct ifnet *ifp); |
| 809 | void if_purgeaddrs_nolink(struct ifnet *); |
| 810 | void if_detach(struct ifnet *); |
| 811 | void if_down(struct ifnet *); |
| 812 | void if_link_state_change(struct ifnet *); |
| 813 | void if_initname(struct ifnet *, const char *, int); |
| 814 | int if_getanyethermac(uint16_t *, int); |
| 815 | int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); |
| 816 | struct ifnet *if_alloc(uint8_t); |
| 817 | void if_free(struct ifnet *); |
| 818 | void if_route(struct ifnet *, int flag, int fam); |
| 819 | int if_setlladdr(struct ifnet *, const u_char *, int); |
| 820 | void if_unroute(struct ifnet *, int flag, int fam); |
| 821 | void if_up(struct ifnet *); |
| 822 | /*void ifinit(void);*/ /* declared in systm.h for main() */ |
| 823 | int ifioctl(struct socket *, u_long, caddr_t, struct ucred *); |
| 824 | int ifpromisc(struct ifnet *, int); |
| 825 | struct ifnet *ifunit(const char *); |
| 826 | struct ifnet *if_withname(struct sockaddr *); |
| 827 | |
| 828 | struct ifg_group *if_creategroup(const char *); |
| 829 | int if_addgroup(struct ifnet *, const char *); |
| 830 | int if_delgroup(struct ifnet *, const char *); |
| 831 | int if_getgroup(caddr_t, struct ifnet *); |
| 832 | int if_getgroupmembers(caddr_t); |
| 833 | |
| 834 | struct ifaddr *ifa_ifwithaddr(struct sockaddr *); |
| 835 | struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); |
| 836 | struct ifaddr *ifa_ifwithnet(struct sockaddr *); |
| 837 | struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); |
| 838 | struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); |
| 839 | |
| 840 | typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); |
| 841 | typedef void if_com_free_t(void *com, u_char type); |
| 842 | void if_register_com_alloc(u_char, if_com_alloc_t *a, if_com_free_t *); |
| 843 | void if_deregister_com_alloc(u_char); |
| 844 | |
| 845 | void *ifa_create(int, int); |
| 846 | void ifa_destroy(struct ifaddr *); |
| 847 | void ifa_iflink(struct ifaddr *, struct ifnet *, int); |
| 848 | void ifa_ifunlink(struct ifaddr *, struct ifnet *); |
| 849 | |
| 850 | struct ifaddr *ifaddr_byindex(unsigned short); |
| 851 | |
| 852 | struct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); |
| 853 | int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); |
| 854 | void if_devstart(struct ifnet *ifp); /* COMPAT */ |
| 855 | void if_devstart_sched(struct ifnet *ifp); /* COMPAT */ |
| 856 | int if_ring_count2(int cnt, int cnt_max); |
| 857 | |
| 858 | #define IF_LLSOCKADDR(ifp) \ |
| 859 | ((struct sockaddr_dl *)(ifp)->if_lladdr->ifa_addr) |
| 860 | #define IF_LLADDR(ifp) LLADDR(IF_LLSOCKADDR(ifp)) |
| 861 | |
| 862 | #ifdef IFPOLL_ENABLE |
| 863 | int ifpoll_register(struct ifnet *); |
| 864 | int ifpoll_deregister(struct ifnet *); |
| 865 | #endif /* IFPOLL_ENABLE */ |
| 866 | |
| 867 | #endif /* _KERNEL */ |
| 868 | |
| 869 | #endif /* !_NET_IF_VAR_H_ */ |