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sys/net/if.h
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1 /* $NetBSD: if.h,v 1.140 2008/10/24 17:07:33 dyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by William Studenmund and Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if.h 8.3 (Berkeley) 2/9/95 61 */ 62 63 #ifndef _NET_IF_H_ 64 #define _NET_IF_H_ 65 66 #include <sys/featuretest.h> 67 68 /* 69 * Length of interface external name, including terminating '\0'. 70 * Note: this is the same size as a generic device's external name. 71 */ 72 #define IF_NAMESIZE 16 73 74 #if defined(_NETBSD_SOURCE) 75 76 #include <sys/mutex.h> 77 #include <sys/condvar.h> 78 #include <sys/socket.h> 79 #include <sys/queue.h> 80 #include <net/dlt.h> 81 #include <net/pfil.h> 82 83 /* 84 * Always include ALTQ glue here -- we use the ALTQ interface queue 85 * structure even when ALTQ is not configured into the kernel so that 86 * the size of struct ifnet does not changed based on the option. The 87 * ALTQ queue structure is API-compatible with the legacy ifqueue. 88 */ 89 #include <altq/if_altq.h> 90 91 /* 92 * Structures defining a network interface, providing a packet 93 * transport mechanism (ala level 0 of the PUP protocols). 94 * 95 * Each interface accepts output datagrams of a specified maximum 96 * length, and provides higher level routines with input datagrams 97 * received from its medium. 98 * 99 * Output occurs when the routine if_output is called, with four parameters: 100 * (*ifp->if_output)(ifp, m, dst, rt) 101 * Here m is the mbuf chain to be sent and dst is the destination address. 102 * The output routine encapsulates the supplied datagram if necessary, 103 * and then transmits it on its medium. 104 * 105 * On input, each interface unwraps the data received by it, and either 106 * places it on the input queue of a internetwork datagram routine 107 * and posts the associated software interrupt, or passes the datagram to a raw 108 * packet input routine. 109 * 110 * Routines exist for locating interfaces by their addresses 111 * or for locating a interface on a certain network, as well as more general 112 * routing and gateway routines maintaining information used to locate 113 * interfaces. These routines live in the files if.c and route.c 114 */ 115 /* XXX fast fix for SNMP, going away soon */ 116 #include <sys/time.h> 117 118 #if defined(_KERNEL_OPT) 119 #include "opt_compat_netbsd.h" 120 #endif 121 122 struct mbuf; 123 struct proc; 124 struct rtentry; 125 struct socket; 126 struct ether_header; 127 struct ifaddr; 128 struct ifnet; 129 struct rt_addrinfo; 130 131 #define IFNAMSIZ IF_NAMESIZE 132 133 /* 134 * Structure describing a `cloning' interface. 135 */ 136 struct if_clone { 137 LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */ 138 const char *ifc_name; /* name of device, e.g. `gif' */ 139 size_t ifc_namelen; /* length of name */ 140 141 int (*ifc_create)(struct if_clone *, int); 142 int (*ifc_destroy)(struct ifnet *); 143 }; 144 145 #define IF_CLONE_INITIALIZER(name, create, destroy) \ 146 { { NULL, NULL }, name, sizeof(name) - 1, create, destroy } 147 148 /* 149 * Structure used to query names of interface cloners. 150 */ 151 struct if_clonereq { 152 int ifcr_total; /* total cloners (out) */ 153 int ifcr_count; /* room for this many in user buffer */ 154 char *ifcr_buffer; /* buffer for cloner names */ 155 }; 156 157 /* 158 * Structure defining statistics and other data kept regarding a network 159 * interface. 160 */ 161 struct if_data { 162 /* generic interface information */ 163 u_char ifi_type; /* ethernet, tokenring, etc. */ 164 u_char ifi_addrlen; /* media address length */ 165 u_char ifi_hdrlen; /* media header length */ 166 int ifi_link_state; /* current link state */ 167 u_quad_t ifi_mtu; /* maximum transmission unit */ 168 u_quad_t ifi_metric; /* routing metric (external only) */ 169 u_quad_t ifi_baudrate; /* linespeed */ 170 /* volatile statistics */ 171 u_quad_t ifi_ipackets; /* packets received on interface */ 172 u_quad_t ifi_ierrors; /* input errors on interface */ 173 u_quad_t ifi_opackets; /* packets sent on interface */ 174 u_quad_t ifi_oerrors; /* output errors on interface */ 175 u_quad_t ifi_collisions; /* collisions on csma interfaces */ 176 u_quad_t ifi_ibytes; /* total number of octets received */ 177 u_quad_t ifi_obytes; /* total number of octets sent */ 178 u_quad_t ifi_imcasts; /* packets received via multicast */ 179 u_quad_t ifi_omcasts; /* packets sent via multicast */ 180 u_quad_t ifi_iqdrops; /* dropped on input, this interface */ 181 u_quad_t ifi_noproto; /* destined for unsupported protocol */ 182 struct timeval ifi_lastchange; /* last operational state change */ 183 }; 184 185 /* 186 * Values for if_link_state. 187 */ 188 #define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */ 189 #define LINK_STATE_DOWN 1 /* link is down */ 190 #define LINK_STATE_UP 2 /* link is up */ 191 192 #if defined(_KERNEL) && defined(COMPAT_14) 193 /* Pre-1.5 if_data struct */ 194 struct if_data14 { 195 /* generic interface information */ 196 u_char ifi_type; /* ethernet, tokenring, etc. */ 197 u_char ifi_addrlen; /* media address length */ 198 u_char ifi_hdrlen; /* media header length */ 199 u_long ifi_mtu; /* maximum transmission unit */ 200 u_long ifi_metric; /* routing metric (external only) */ 201 u_long ifi_baudrate; /* linespeed */ 202 /* volatile statistics */ 203 u_long ifi_ipackets; /* packets received on interface */ 204 u_long ifi_ierrors; /* input errors on interface */ 205 u_long ifi_opackets; /* packets sent on interface */ 206 u_long ifi_oerrors; /* output errors on interface */ 207 u_long ifi_collisions; /* collisions on csma interfaces */ 208 u_long ifi_ibytes; /* total number of octets received */ 209 u_long ifi_obytes; /* total number of octets sent */ 210 u_long ifi_imcasts; /* packets received via multicast */ 211 u_long ifi_omcasts; /* packets sent via multicast */ 212 u_long ifi_iqdrops; /* dropped on input, this interface */ 213 u_long ifi_noproto; /* destined for unsupported protocol */ 214 struct timeval ifi_lastchange; /* last operational state change */ 215 }; 216 #endif /* _KERNEL && COMPAT_14 */ 217 218 /* 219 * Structure defining a queue for a network interface. 220 */ 221 struct ifqueue { 222 struct mbuf *ifq_head; 223 struct mbuf *ifq_tail; 224 int ifq_len; 225 int ifq_maxlen; 226 int ifq_drops; 227 }; 228 229 /* 230 * Structure defining a queue for a network interface. 231 * 232 * (Would like to call this struct ``if'', but C isn't PL/1.) 233 */ 234 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ 235 236 struct ifnet { /* and the entries */ 237 void *if_softc; /* lower-level data for this if */ 238 TAILQ_ENTRY(ifnet) if_list; /* all struct ifnets are chained */ 239 TAILQ_HEAD(, ifaddr) if_addrlist; /* linked list of addresses per if */ 240 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 241 int if_pcount; /* number of promiscuous listeners */ 242 void * if_bpf; /* packet filter structure */ 243 u_short if_index; /* numeric abbreviation for this if */ 244 short if_timer; /* time 'til if_watchdog called */ 245 short if_flags; /* up/down, broadcast, etc. */ 246 short if__pad1; /* be nice to m68k ports */ 247 struct if_data if_data; /* statistics and other data about if */ 248 /* 249 * Procedure handles. If you add more of these, don't forget the 250 * corresponding NULL stub in if.c. 251 */ 252 int (*if_output) /* output routine (enqueue) */ 253 (struct ifnet *, struct mbuf *, const struct sockaddr *, 254 struct rtentry *); 255 void (*if_input) /* input routine (from h/w driver) */ 256 (struct ifnet *, struct mbuf *); 257 void (*if_start) /* initiate output routine */ 258 (struct ifnet *); 259 int (*if_ioctl) /* ioctl routine */ 260 (struct ifnet *, u_long, void *); 261 int (*if_init) /* init routine */ 262 (struct ifnet *); 263 void (*if_stop) /* stop routine */ 264 (struct ifnet *, int); 265 void (*if_watchdog) /* timer routine */ 266 (struct ifnet *); 267 void (*if_drain) /* routine to release resources */ 268 (struct ifnet *); 269 struct ifaltq if_snd; /* output queue (includes altq) */ 270 struct ifaddr *if_dl; /* identity of this interface. */ 271 const struct sockaddr_dl *if_sadl; /* pointer to our sockaddr_dl */ 272 const uint8_t *if_broadcastaddr;/* linklevel broadcast bytestring */ 273 void *if_bridge; /* bridge glue */ 274 int if_dlt; /* data link type (<net/dlt.h>) */ 275 struct pfil_head if_pfil; /* filtering point */ 276 uint64_t if_capabilities; /* interface capabilities */ 277 uint64_t if_capenable; /* capabilities enabled */ 278 union { 279 void * carp_s; /* carp structure (used by !carp ifs) */ 280 struct ifnet *carp_d;/* ptr to carpdev (used by carp ifs) */ 281 } if_carp_ptr; 282 #define if_carp if_carp_ptr.carp_s 283 #define if_carpdev if_carp_ptr.carp_d 284 /* 285 * These are pre-computed based on an interfaces enabled 286 * capabilities, for speed elsewhere. 287 */ 288 int if_csum_flags_tx; /* M_CSUM_* flags for Tx */ 289 int if_csum_flags_rx; /* M_CSUM_* flags for Rx */ 290 291 void *if_afdata[AF_MAX]; 292 struct mowner *if_mowner; /* who owns mbufs for this interface */ 293 294 void *if_agrprivate; /* used only when #if NAGR > 0 */ 295 296 /* 297 * pf specific data, used only when #if NPF > 0. 298 */ 299 void *if_pf_kif; /* pf interface abstraction */ 300 void *if_pf_groups; /* pf interface groups */ 301 }; 302 #define if_mtu if_data.ifi_mtu 303 #define if_type if_data.ifi_type 304 #define if_addrlen if_data.ifi_addrlen 305 #define if_hdrlen if_data.ifi_hdrlen 306 #define if_metric if_data.ifi_metric 307 #define if_link_state if_data.ifi_link_state 308 #define if_baudrate if_data.ifi_baudrate 309 #define if_ipackets if_data.ifi_ipackets 310 #define if_ierrors if_data.ifi_ierrors 311 #define if_opackets if_data.ifi_opackets 312 #define if_oerrors if_data.ifi_oerrors 313 #define if_collisions if_data.ifi_collisions 314 #define if_ibytes if_data.ifi_ibytes 315 #define if_obytes if_data.ifi_obytes 316 #define if_imcasts if_data.ifi_imcasts 317 #define if_omcasts if_data.ifi_omcasts 318 #define if_iqdrops if_data.ifi_iqdrops 319 #define if_noproto if_data.ifi_noproto 320 #define if_lastchange if_data.ifi_lastchange 321 322 #define IFF_UP 0x0001 /* interface is up */ 323 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 324 #define IFF_DEBUG 0x0004 /* turn on debugging */ 325 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 326 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 327 #define IFF_NOTRAILERS 0x0020 /* avoid use of trailers */ 328 #define IFF_RUNNING 0x0040 /* resources allocated */ 329 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 330 #define IFF_PROMISC 0x0100 /* receive all packets */ 331 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 332 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 333 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 334 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 335 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 336 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 337 #define IFF_MULTICAST 0x8000 /* supports multicast */ 338 339 #define IFFBITS \ 340 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS" \ 341 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 342 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 343 344 /* flags set internally only: */ 345 #define IFF_CANTCHANGE \ 346 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 347 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 348 349 /* 350 * Some convenience macros used for setting ifi_baudrate. 351 * XXX 1000 vs. 1024? --thorpej@NetBSD.org 352 */ 353 #define IF_Kbps(x) ((x) * 1000) /* kilobits/sec. */ 354 #define IF_Mbps(x) (IF_Kbps((x) * 1000)) /* megabits/sec. */ 355 #define IF_Gbps(x) (IF_Mbps((x) * 1000)) /* gigabits/sec. */ 356 357 /* Capabilities that interfaces can advertise. */ 358 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 359 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 360 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 361 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 362 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 363 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 364 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 365 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 366 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 367 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 368 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 369 #define IFCAP_TSOv6 0x40000 /* can do TCPv6 segmentation offload */ 370 371 #define IFCAPBITS \ 372 "\020" \ 373 "\10TSO4" \ 374 "\11IP4CSUM_Rx" \ 375 "\12IP4CSUM_Tx" \ 376 "\13TCP4CSUM_Rx" \ 377 "\14TCP4CSUM_Tx" \ 378 "\15UDP4CSUM_Rx" \ 379 "\16UDP4CSUM_Tx" \ 380 "\17TCP6CSUM_Rx" \ 381 "\20TCP6CSUM_Tx" \ 382 "\21UDP6CSUM_Rx" \ 383 "\22UDP6CSUM_Tx" \ 384 "\23TSO6" 385 386 /* 387 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 388 * input routines have queues of messages stored on ifqueue structures 389 * (defined above). Entries are added to and deleted from these structures 390 * by these macros, which should be called with ipl raised to splnet(). 391 */ 392 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 393 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 394 #define IF_ENQUEUE(ifq, m) do { \ 395 (m)->m_nextpkt = 0; \ 396 if ((ifq)->ifq_tail == 0) \ 397 (ifq)->ifq_head = m; \ 398 else \ 399 (ifq)->ifq_tail->m_nextpkt = m; \ 400 (ifq)->ifq_tail = m; \ 401 (ifq)->ifq_len++; \ 402 } while (/*CONSTCOND*/0) 403 #define IF_PREPEND(ifq, m) do { \ 404 (m)->m_nextpkt = (ifq)->ifq_head; \ 405 if ((ifq)->ifq_tail == 0) \ 406 (ifq)->ifq_tail = (m); \ 407 (ifq)->ifq_head = (m); \ 408 (ifq)->ifq_len++; \ 409 } while (/*CONSTCOND*/0) 410 #define IF_DEQUEUE(ifq, m) do { \ 411 (m) = (ifq)->ifq_head; \ 412 if (m) { \ 413 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 414 (ifq)->ifq_tail = 0; \ 415 (m)->m_nextpkt = 0; \ 416 (ifq)->ifq_len--; \ 417 } \ 418 } while (/*CONSTCOND*/0) 419 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 420 #define IF_PURGE(ifq) \ 421 do { \ 422 struct mbuf *__m0; \ 423 \ 424 for (;;) { \ 425 IF_DEQUEUE((ifq), __m0); \ 426 if (__m0 == NULL) \ 427 break; \ 428 else \ 429 m_freem(__m0); \ 430 } \ 431 } while (/*CONSTCOND*/ 0) 432 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 433 434 #ifndef IFQ_MAXLEN 435 #define IFQ_MAXLEN 256 436 #endif 437 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 438 439 /* 440 * Structure defining statistics and other data kept regarding an address 441 * on a network interface. 442 */ 443 struct ifaddr_data { 444 int64_t ifad_inbytes; 445 int64_t ifad_outbytes; 446 }; 447 448 /* 449 * The ifaddr structure contains information about one address 450 * of an interface. They are maintained by the different address families, 451 * are allocated and attached when an address is set, and are linked 452 * together so all addresses for an interface can be located. 453 */ 454 struct ifaddr { 455 struct sockaddr *ifa_addr; /* address of interface */ 456 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 457 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 458 struct sockaddr *ifa_netmask; /* used to determine subnet */ 459 struct ifnet *ifa_ifp; /* back-pointer to interface */ 460 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 461 struct ifaddr_data ifa_data; /* statistics on the address */ 462 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 463 (int, struct rtentry *, const struct rt_addrinfo *); 464 u_int ifa_flags; /* mostly rt_flags for cloning */ 465 int ifa_refcnt; /* count of references */ 466 int ifa_metric; /* cost of going out this interface */ 467 struct ifaddr *(*ifa_getifa)(struct ifaddr *, 468 const struct sockaddr *); 469 uint32_t *ifa_seqno; 470 int16_t ifa_preference; /* preference level for this address */ 471 }; 472 #define IFA_ROUTE RTF_UP /* (0x01) route installed */ 473 474 /* 475 * Message format for use in obtaining information about interfaces 476 * from sysctl and the routing socket. 477 */ 478 struct if_msghdr { 479 u_short ifm_msglen; /* to skip over non-understood messages */ 480 u_char ifm_version; /* future binary compatibility */ 481 u_char ifm_type; /* message type */ 482 int ifm_addrs; /* like rtm_addrs */ 483 int ifm_flags; /* value of if_flags */ 484 u_short ifm_index; /* index for associated ifp */ 485 struct if_data ifm_data;/* statistics and other data about if */ 486 }; 487 488 #if defined(_KERNEL) && defined(COMPAT_14) 489 /* pre-1.5 if_msghdr (ifm_data changed) */ 490 struct if_msghdr14 { 491 u_short ifm_msglen; /* to skip over non-understood messages */ 492 u_char ifm_version; /* future binary compatibility */ 493 u_char ifm_type; /* message type */ 494 int ifm_addrs; /* like rtm_addrs */ 495 int ifm_flags; /* value of if_flags */ 496 u_short ifm_index; /* index for associated ifp */ 497 struct if_data14 ifm_data; /* statistics and other data about if */ 498 }; 499 #endif /* _KERNEL && COMPAT_14 */ 500 501 /* 502 * Message format for use in obtaining information about interface addresses 503 * from sysctl and the routing socket. 504 */ 505 struct ifa_msghdr { 506 u_short ifam_msglen; /* to skip over non-understood messages */ 507 u_char ifam_version; /* future binary compatibility */ 508 u_char ifam_type; /* message type */ 509 int ifam_addrs; /* like rtm_addrs */ 510 int ifam_flags; /* value of ifa_flags */ 511 u_short ifam_index; /* index for associated ifp */ 512 int ifam_metric; /* value of ifa_metric */ 513 }; 514 515 /* 516 * Message format announcing the arrival or departure of a network interface. 517 */ 518 struct if_announcemsghdr { 519 u_short ifan_msglen; /* to skip over non-understood messages */ 520 u_char ifan_version; /* future binary compatibility */ 521 u_char ifan_type; /* message type */ 522 u_short ifan_index; /* index for associated ifp */ 523 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 524 u_short ifan_what; /* what type of announcement */ 525 }; 526 527 #define IFAN_ARRIVAL 0 /* interface arrival */ 528 #define IFAN_DEPARTURE 1 /* interface departure */ 529 530 /* 531 * Interface request structure used for socket 532 * ioctl's. All interface ioctl's must have parameter 533 * definitions which begin with ifr_name. The 534 * remainder may be interface specific. 535 */ 536 struct ifreq { 537 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 538 union { 539 struct sockaddr ifru_addr; 540 struct sockaddr ifru_dstaddr; 541 struct sockaddr ifru_broadaddr; 542 struct sockaddr_storage ifru_space; 543 short ifru_flags; 544 int ifru_metric; 545 int ifru_mtu; 546 int ifru_dlt; 547 u_int ifru_value; 548 void * ifru_data; 549 struct { 550 uint32_t b_buflen; 551 void *b_buf; 552 } ifru_b; 553 } ifr_ifru; 554 #define ifr_addr ifr_ifru.ifru_addr /* address */ 555 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 556 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 557 #define ifr_space ifr_ifru.ifru_space /* sockaddr_storage */ 558 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 559 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 560 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 561 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 562 #define ifr_value ifr_ifru.ifru_value /* generic value */ 563 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 564 #define ifr_data ifr_ifru.ifru_data /* for use by interface 565 * XXX deprecated 566 */ 567 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 568 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 569 }; 570 571 #ifdef _KERNEL 572 #define ifreq_setdstaddr ifreq_setaddr 573 #define ifreq_setbroadaddr ifreq_setaddr 574 #define ifreq_getdstaddr ifreq_getaddr 575 #define ifreq_getbroadaddr ifreq_getaddr 576 577 static inline const struct sockaddr * 578 ifreq_getaddr(u_long cmd, const struct ifreq *ifr) 579 { 580 return &ifr->ifr_addr; 581 } 582 #endif /* _KERNEL */ 583 584 struct ifcapreq { 585 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 586 uint64_t ifcr_capabilities; /* supported capabiliites */ 587 uint64_t ifcr_capenable; /* capabilities enabled */ 588 }; 589 590 struct ifaliasreq { 591 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 592 struct sockaddr ifra_addr; 593 struct sockaddr ifra_dstaddr; 594 #define ifra_broadaddr ifra_dstaddr 595 struct sockaddr ifra_mask; 596 }; 597 598 struct ifdatareq { 599 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 600 struct if_data ifdr_data; 601 }; 602 603 struct ifmediareq { 604 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 605 int ifm_current; /* current media options */ 606 int ifm_mask; /* don't care mask */ 607 int ifm_status; /* media status */ 608 int ifm_active; /* active options */ 609 int ifm_count; /* # entries in ifm_ulist 610 array */ 611 int *ifm_ulist; /* media words */ 612 }; 613 614 615 struct ifdrv { 616 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 617 unsigned long ifd_cmd; 618 size_t ifd_len; 619 void *ifd_data; 620 }; 621 622 /* 623 * Structure used in SIOCGIFCONF request. 624 * Used to retrieve interface configuration 625 * for machine (useful for programs which 626 * must know all networks accessible). 627 */ 628 struct ifconf { 629 int ifc_len; /* size of associated buffer */ 630 union { 631 void * ifcu_buf; 632 struct ifreq *ifcu_req; 633 } ifc_ifcu; 634 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 635 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 636 }; 637 638 /* 639 * Structure for SIOC[AGD]LIFADDR 640 */ 641 struct if_laddrreq { 642 char iflr_name[IFNAMSIZ]; 643 unsigned int flags; 644 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 645 #define IFLR_ACTIVE 0x4000 /* in/out: link-layer address activation */ 646 unsigned int prefixlen; /* in/out */ 647 struct sockaddr_storage addr; /* in/out */ 648 struct sockaddr_storage dstaddr; /* out */ 649 }; 650 651 /* 652 * Structure for SIOC[SG]IFADDRPREF 653 */ 654 struct if_addrprefreq { 655 char ifap_name[IFNAMSIZ]; 656 int16_t ifap_preference; /* in/out */ 657 struct sockaddr_storage ifap_addr; /* in/out */ 658 }; 659 660 #include <net/if_arp.h> 661 662 #endif /* _NETBSD_SOURCE */ 663 664 #ifdef _KERNEL 665 #ifdef IFAREF_DEBUG 666 #define IFAREF(ifa) \ 667 do { \ 668 printf("IFAREF: %s:%d %p -> %d\n", __FILE__, __LINE__, \ 669 (ifa), ++(ifa)->ifa_refcnt); \ 670 } while (/*CONSTCOND*/ 0) 671 672 #define IFAFREE(ifa) \ 673 do { \ 674 if ((ifa)->ifa_refcnt <= 0) \ 675 panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \ 676 __LINE__, (ifa)); \ 677 printf("IFAFREE: %s:%d %p -> %d\n", __FILE__, __LINE__, \ 678 (ifa), --(ifa)->ifa_refcnt); \ 679 if ((ifa)->ifa_refcnt == 0) \ 680 ifafree(ifa); \ 681 } while (/*CONSTCOND*/ 0) 682 #else 683 #define IFAREF(ifa) (ifa)->ifa_refcnt++ 684 685 #ifdef DIAGNOSTIC 686 #define IFAFREE(ifa) \ 687 do { \ 688 if ((ifa)->ifa_refcnt <= 0) \ 689 panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \ 690 __LINE__, (ifa)); \ 691 if (--(ifa)->ifa_refcnt == 0) \ 692 ifafree(ifa); \ 693 } while (/*CONSTCOND*/ 0) 694 #else 695 #define IFAFREE(ifa) \ 696 do { \ 697 if (--(ifa)->ifa_refcnt == 0) \ 698 ifafree(ifa); \ 699 } while (/*CONSTCOND*/ 0) 700 #endif /* DIAGNOSTIC */ 701 #endif /* IFAREF_DEBUG */ 702 703 #ifdef ALTQ 704 #define ALTQ_DECL(x) x 705 #define ALTQ_COMMA , 706 707 #define IFQ_ENQUEUE(ifq, m, pattr, err) \ 708 do { \ 709 if (ALTQ_IS_ENABLED((ifq))) \ 710 ALTQ_ENQUEUE((ifq), (m), (pattr), (err)); \ 711 else { \ 712 if (IF_QFULL((ifq))) { \ 713 m_freem((m)); \ 714 (err) = ENOBUFS; \ 715 } else { \ 716 IF_ENQUEUE((ifq), (m)); \ 717 (err) = 0; \ 718 } \ 719 } \ 720 if ((err)) \ 721 (ifq)->ifq_drops++; \ 722 } while (/*CONSTCOND*/ 0) 723 724 #define IFQ_DEQUEUE(ifq, m) \ 725 do { \ 726 if (TBR_IS_ENABLED((ifq))) \ 727 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 728 else if (ALTQ_IS_ENABLED((ifq))) \ 729 ALTQ_DEQUEUE((ifq), (m)); \ 730 else \ 731 IF_DEQUEUE((ifq), (m)); \ 732 } while (/*CONSTCOND*/ 0) 733 734 #define IFQ_POLL(ifq, m) \ 735 do { \ 736 if (TBR_IS_ENABLED((ifq))) \ 737 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 738 else if (ALTQ_IS_ENABLED((ifq))) \ 739 ALTQ_POLL((ifq), (m)); \ 740 else \ 741 IF_POLL((ifq), (m)); \ 742 } while (/*CONSTCOND*/ 0) 743 744 #define IFQ_PURGE(ifq) \ 745 do { \ 746 if (ALTQ_IS_ENABLED((ifq))) \ 747 ALTQ_PURGE((ifq)); \ 748 else \ 749 IF_PURGE((ifq)); \ 750 } while (/*CONSTCOND*/ 0) 751 752 #define IFQ_SET_READY(ifq) \ 753 do { \ 754 (ifq)->altq_flags |= ALTQF_READY; \ 755 } while (/*CONSTCOND*/ 0) 756 757 #define IFQ_CLASSIFY(ifq, m, af, pattr) \ 758 do { \ 759 if (ALTQ_IS_ENABLED((ifq))) { \ 760 if (ALTQ_NEEDS_CLASSIFY((ifq))) \ 761 (pattr)->pattr_class = (*(ifq)->altq_classify) \ 762 ((ifq)->altq_clfier, (m), (af)); \ 763 (pattr)->pattr_af = (af); \ 764 (pattr)->pattr_hdr = mtod((m), void *); \ 765 } \ 766 } while (/*CONSTCOND*/ 0) 767 #else /* ! ALTQ */ 768 #define ALTQ_DECL(x) /* nothing */ 769 #define ALTQ_COMMA 770 771 #define IFQ_ENQUEUE(ifq, m, pattr, err) \ 772 do { \ 773 if (IF_QFULL((ifq))) { \ 774 m_freem((m)); \ 775 (err) = ENOBUFS; \ 776 } else { \ 777 IF_ENQUEUE((ifq), (m)); \ 778 (err) = 0; \ 779 } \ 780 if ((err)) \ 781 (ifq)->ifq_drops++; \ 782 } while (/*CONSTCOND*/ 0) 783 784 #define IFQ_DEQUEUE(ifq, m) IF_DEQUEUE((ifq), (m)) 785 786 #define IFQ_POLL(ifq, m) IF_POLL((ifq), (m)) 787 788 #define IFQ_PURGE(ifq) IF_PURGE((ifq)) 789 790 #define IFQ_SET_READY(ifq) /* nothing */ 791 792 #define IFQ_CLASSIFY(ifq, m, af, pattr) /* nothing */ 793 794 #endif /* ALTQ */ 795 796 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY((ifq)) 797 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 798 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 799 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 800 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 801 802 #include <sys/mallocvar.h> 803 MALLOC_DECLARE(M_IFADDR); 804 MALLOC_DECLARE(M_IFMADDR); 805 806 #define IFNET_FIRST() TAILQ_FIRST(&ifnet) 807 #define IFNET_NEXT(__ifp) TAILQ_NEXT((__ifp), if_list) 808 #define IFNET_FOREACH(__ifp) TAILQ_FOREACH(__ifp, &ifnet, if_list) 809 #define IFADDR_FIRST(__ifp) TAILQ_FIRST(&(__ifp)->if_addrlist) 810 #define IFADDR_NEXT(__ifa) TAILQ_NEXT((__ifa), ifa_list) 811 #define IFADDR_FOREACH(__ifa, __ifp) TAILQ_FOREACH(__ifa, \ 812 &(__ifp)->if_addrlist, ifa_list) 813 #define IFADDR_EMPTY(__ifp) TAILQ_EMPTY(&(__ifp)->if_addrlist) 814 815 extern struct ifnet_head ifnet; 816 extern struct ifnet **ifindex2ifnet; 817 extern struct ifnet *lo0ifp; 818 extern size_t if_indexlim; 819 820 void ether_input(struct ifnet *, struct mbuf *); 821 822 int ifreq_setaddr(u_long, struct ifreq *, const struct sockaddr *); 823 824 struct ifnet *if_alloc(u_char); 825 void if_initname(struct ifnet *, const char *, int); 826 struct ifaddr *if_dl_create(const struct ifnet *, const struct sockaddr_dl **); 827 void if_activate_sadl(struct ifnet *, struct ifaddr *, 828 const struct sockaddr_dl *); 829 void if_set_sadl(struct ifnet *, const void *, u_char); 830 void if_alloc_sadl(struct ifnet *); 831 void if_free_sadl(struct ifnet *); 832 void if_attach(struct ifnet *); 833 void if_attachdomain(void); 834 void if_attachdomain1(struct ifnet *); 835 void if_deactivate(struct ifnet *); 836 void if_purgeaddrs(struct ifnet *, int, void (*)(struct ifaddr *)); 837 void if_detach(struct ifnet *); 838 void if_down(struct ifnet *); 839 void if_link_state_change(struct ifnet *, int); 840 void if_slowtimo(void *); 841 void if_up(struct ifnet *); 842 int ifconf(u_long, void *); 843 void ifinit(void); 844 void ifinit1(void); 845 int ifioctl(struct socket *, u_long, void *, struct lwp *); 846 int ifioctl_common(struct ifnet *, u_long, void *); 847 int ifpromisc(struct ifnet *, int); 848 struct ifnet *ifunit(const char *); 849 850 void ifa_insert(struct ifnet *, struct ifaddr *); 851 void ifa_remove(struct ifnet *, struct ifaddr *); 852 853 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 854 struct ifaddr *ifa_ifwithaf(int); 855 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *); 856 struct ifaddr *ifa_ifwithnet(const struct sockaddr *); 857 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *); 858 struct ifaddr *ifa_ifwithroute(int, const struct sockaddr *, 859 const struct sockaddr *); 860 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 861 void ifafree(struct ifaddr *); 862 void link_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 863 864 void if_clone_attach(struct if_clone *); 865 void if_clone_detach(struct if_clone *); 866 867 int if_clone_create(const char *); 868 int if_clone_destroy(const char *); 869 870 int ifq_enqueue(struct ifnet *, struct mbuf * ALTQ_COMMA 871 ALTQ_DECL(struct altq_pktattr *)); 872 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf * ALTQ_COMMA 873 ALTQ_DECL(struct altq_pktattr *)); 874 875 int loioctl(struct ifnet *, u_long, void *); 876 void loopattach(int); 877 int looutput(struct ifnet *, 878 struct mbuf *, const struct sockaddr *, struct rtentry *); 879 void lortrequest(int, struct rtentry *, const struct rt_addrinfo *); 880 881 /* 882 * These are exported because they're an easy way to tell if 883 * an interface is going away without having to burn a flag. 884 */ 885 int if_nulloutput(struct ifnet *, struct mbuf *, 886 const struct sockaddr *, struct rtentry *); 887 void if_nullinput(struct ifnet *, struct mbuf *); 888 void if_nullstart(struct ifnet *); 889 int if_nullioctl(struct ifnet *, u_long, void *); 890 int if_nullinit(struct ifnet *); 891 void if_nullstop(struct ifnet *, int); 892 void if_nullwatchdog(struct ifnet *); 893 void if_nulldrain(struct ifnet *); 894 #else 895 struct if_nameindex { 896 unsigned int if_index; /* 1, 2, ... */ 897 char *if_name; /* null terminated name: "le0", ... */ 898 }; 899 900 #include <sys/cdefs.h> 901 __BEGIN_DECLS 902 unsigned int if_nametoindex(const char *); 903 char * if_indextoname(unsigned int, char *); 904 struct if_nameindex * if_nameindex(void); 905 void if_freenameindex(struct if_nameindex *); 906 __END_DECLS 907 #endif /* _KERNEL */ /* XXX really ALTQ? */ 908 909 #ifdef _KERNEL 910 /* 911 * ifq sysctl support 912 */ 913 int sysctl_ifq(int *name, u_int namelen, void *oldp, 914 size_t *oldlenp, void *newp, size_t newlen, 915 struct ifqueue *ifq); 916 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 917 #define IFQCTL_LEN 1 918 #define IFQCTL_MAXLEN 2 919 #define IFQCTL_PEAK 3 920 #define IFQCTL_DROPS 4 921 #define IFQCTL_MAXID 5 922 923 #endif /* _KERNEL */ 924 925 #ifdef _NETBSD_SOURCE 926 /* 927 * sysctl for ifq (per-protocol packet input queue variant of ifqueue) 928 */ 929 #define CTL_IFQ_NAMES { \ 930 { 0, 0 }, \ 931 { "len", CTLTYPE_INT }, \ 932 { "maxlen", CTLTYPE_INT }, \ 933 { "peak", CTLTYPE_INT }, \ 934 { "drops", CTLTYPE_INT }, \ 935 } 936 #endif /* _NETBSD_SOURCE */ 937 #endif /* !_NET_IF_H_ */
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