if.h revision 1.112
1 /* $NetBSD: if.h,v 1.112 2005/12/06 02:56:25 christos 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1982, 1986, 1989, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)if.h 8.3 (Berkeley) 2/9/95 68 */ 69 70 #ifndef _NET_IF_H_ 71 #define _NET_IF_H_ 72 73 #include <sys/featuretest.h> 74 75 /* 76 * Length of interface external name, including terminating '\0'. 77 * Note: this is the same size as a generic device's external name. 78 */ 79 #define IF_NAMESIZE 16 80 81 #if defined(_NETBSD_SOURCE) 82 83 #include <sys/socket.h> 84 #include <sys/queue.h> 85 #include <net/dlt.h> 86 #include <net/pfil.h> 87 88 /* 89 * Always include ALTQ glue here -- we use the ALTQ interface queue 90 * structure even when ALTQ is not configured into the kernel so that 91 * the size of struct ifnet does not changed based on the option. The 92 * ALTQ queue structure is API-compatible with the legacy ifqueue. 93 */ 94 #include <altq/if_altq.h> 95 96 /* 97 * Structures defining a network interface, providing a packet 98 * transport mechanism (ala level 0 of the PUP protocols). 99 * 100 * Each interface accepts output datagrams of a specified maximum 101 * length, and provides higher level routines with input datagrams 102 * received from its medium. 103 * 104 * Output occurs when the routine if_output is called, with four parameters: 105 * (*ifp->if_output)(ifp, m, dst, rt) 106 * Here m is the mbuf chain to be sent and dst is the destination address. 107 * The output routine encapsulates the supplied datagram if necessary, 108 * and then transmits it on its medium. 109 * 110 * On input, each interface unwraps the data received by it, and either 111 * places it on the input queue of a internetwork datagram routine 112 * and posts the associated software interrupt, or passes the datagram to a raw 113 * packet input routine. 114 * 115 * Routines exist for locating interfaces by their addresses 116 * or for locating a interface on a certain network, as well as more general 117 * routing and gateway routines maintaining information used to locate 118 * interfaces. These routines live in the files if.c and route.c 119 */ 120 /* XXX fast fix for SNMP, going away soon */ 121 #include <sys/time.h> 122 123 #if defined(_KERNEL_OPT) 124 #include "opt_compat_netbsd.h" 125 #include "agr.h" 126 #endif 127 128 struct mbuf; 129 struct proc; 130 struct rtentry; 131 struct socket; 132 struct ether_header; 133 struct ifnet; 134 struct rt_addrinfo; 135 136 #define IFNAMSIZ IF_NAMESIZE 137 138 /* 139 * Structure describing a `cloning' interface. 140 */ 141 struct if_clone { 142 LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */ 143 const char *ifc_name; /* name of device, e.g. `gif' */ 144 size_t ifc_namelen; /* length of name */ 145 146 int (*ifc_create)(struct if_clone *, int); 147 int (*ifc_destroy)(struct ifnet *); 148 }; 149 150 #define IF_CLONE_INITIALIZER(name, create, destroy) \ 151 { { 0 }, name, sizeof(name) - 1, create, destroy } 152 153 /* 154 * Structure used to query names of interface cloners. 155 */ 156 struct if_clonereq { 157 int ifcr_total; /* total cloners (out) */ 158 int ifcr_count; /* room for this many in user buffer */ 159 char *ifcr_buffer; /* buffer for cloner names */ 160 }; 161 162 /* 163 * Structure defining statistics and other data kept regarding a network 164 * interface. 165 */ 166 struct if_data { 167 /* generic interface information */ 168 u_char ifi_type; /* ethernet, tokenring, etc. */ 169 u_char ifi_addrlen; /* media address length */ 170 u_char ifi_hdrlen; /* media header length */ 171 int ifi_link_state; /* current link state */ 172 u_quad_t ifi_mtu; /* maximum transmission unit */ 173 u_quad_t ifi_metric; /* routing metric (external only) */ 174 u_quad_t ifi_baudrate; /* linespeed */ 175 /* volatile statistics */ 176 u_quad_t ifi_ipackets; /* packets received on interface */ 177 u_quad_t ifi_ierrors; /* input errors on interface */ 178 u_quad_t ifi_opackets; /* packets sent on interface */ 179 u_quad_t ifi_oerrors; /* output errors on interface */ 180 u_quad_t ifi_collisions; /* collisions on csma interfaces */ 181 u_quad_t ifi_ibytes; /* total number of octets received */ 182 u_quad_t ifi_obytes; /* total number of octets sent */ 183 u_quad_t ifi_imcasts; /* packets received via multicast */ 184 u_quad_t ifi_omcasts; /* packets sent via multicast */ 185 u_quad_t ifi_iqdrops; /* dropped on input, this interface */ 186 u_quad_t ifi_noproto; /* destined for unsupported protocol */ 187 struct timeval ifi_lastchange; /* last operational state change */ 188 }; 189 190 /* 191 * Values for if_link_state. 192 */ 193 #define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */ 194 #define LINK_STATE_DOWN 1 /* link is down */ 195 #define LINK_STATE_UP 2 /* link is up */ 196 197 #if defined(_KERNEL) && defined(COMPAT_14) 198 /* Pre-1.5 if_data struct */ 199 struct if_data14 { 200 /* generic interface information */ 201 u_char ifi_type; /* ethernet, tokenring, etc. */ 202 u_char ifi_addrlen; /* media address length */ 203 u_char ifi_hdrlen; /* media header length */ 204 u_long ifi_mtu; /* maximum transmission unit */ 205 u_long ifi_metric; /* routing metric (external only) */ 206 u_long ifi_baudrate; /* linespeed */ 207 /* volatile statistics */ 208 u_long ifi_ipackets; /* packets received on interface */ 209 u_long ifi_ierrors; /* input errors on interface */ 210 u_long ifi_opackets; /* packets sent on interface */ 211 u_long ifi_oerrors; /* output errors on interface */ 212 u_long ifi_collisions; /* collisions on csma interfaces */ 213 u_long ifi_ibytes; /* total number of octets received */ 214 u_long ifi_obytes; /* total number of octets sent */ 215 u_long ifi_imcasts; /* packets received via multicast */ 216 u_long ifi_omcasts; /* packets sent via multicast */ 217 u_long ifi_iqdrops; /* dropped on input, this interface */ 218 u_long ifi_noproto; /* destined for unsupported protocol */ 219 struct timeval ifi_lastchange; /* last operational state change */ 220 }; 221 #endif /* _KERNEL && COMPAT_14 */ 222 223 /* 224 * Structure defining a queue for a network interface. 225 */ 226 struct ifqueue { 227 struct mbuf *ifq_head; 228 struct mbuf *ifq_tail; 229 int ifq_len; 230 int ifq_maxlen; 231 int ifq_drops; 232 }; 233 234 /* 235 * Structure defining a queue for a network interface. 236 * 237 * (Would like to call this struct ``if'', but C isn't PL/1.) 238 */ 239 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ 240 241 struct ifnet { /* and the entries */ 242 void *if_softc; /* lower-level data for this if */ 243 TAILQ_ENTRY(ifnet) if_list; /* all struct ifnets are chained */ 244 TAILQ_HEAD(, ifaddr) if_addrlist; /* linked list of addresses per if */ 245 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 246 int if_pcount; /* number of promiscuous listeners */ 247 caddr_t if_bpf; /* packet filter structure */ 248 u_short if_index; /* numeric abbreviation for this if */ 249 short if_timer; /* time 'til if_watchdog called */ 250 short if_flags; /* up/down, broadcast, etc. */ 251 short if__pad1; /* be nice to m68k ports */ 252 struct if_data if_data; /* statistics and other data about if */ 253 /* 254 * Procedure handles. If you add more of these, don't forget the 255 * corresponding NULL stub in if.c. 256 */ 257 int (*if_output) /* output routine (enqueue) */ 258 __P((struct ifnet *, struct mbuf *, struct sockaddr *, 259 struct rtentry *)); 260 void (*if_input) /* input routine (from h/w driver) */ 261 __P((struct ifnet *, struct mbuf *)); 262 void (*if_start) /* initiate output routine */ 263 __P((struct ifnet *)); 264 int (*if_ioctl) /* ioctl routine */ 265 __P((struct ifnet *, u_long, caddr_t)); 266 int (*if_init) /* init routine */ 267 __P((struct ifnet *)); 268 void (*if_stop) /* stop routine */ 269 __P((struct ifnet *, int)); 270 void (*if_watchdog) /* timer routine */ 271 __P((struct ifnet *)); 272 void (*if_drain) /* routine to release resources */ 273 __P((struct ifnet *)); 274 struct ifaltq if_snd; /* output queue (includes altq) */ 275 struct sockaddr_dl *if_sadl; /* pointer to our sockaddr_dl */ 276 const uint8_t *if_broadcastaddr;/* linklevel broadcast bytestring */ 277 void *if_bridge; /* bridge glue */ 278 int if_dlt; /* data link type (<net/dlt.h>) */ 279 struct pfil_head if_pfil; /* filtering point */ 280 uint64_t if_capabilities; /* interface capabilities */ 281 uint64_t if_capenable; /* capabilities enabled */ 282 283 /* 284 * These are pre-computed based on an interfaces enabled 285 * capabilities, for speed elsewhere. 286 */ 287 int if_csum_flags_tx; /* M_CSUM_* flags for Tx */ 288 int if_csum_flags_rx; /* M_CSUM_* flags for Rx */ 289 290 void *if_afdata[AF_MAX]; 291 struct mowner *if_mowner; /* who owns mbufs for this interface */ 292 293 #if NAGR > 0 294 void *if_agrprivate; 295 #endif 296 }; 297 #define if_mtu if_data.ifi_mtu 298 #define if_type if_data.ifi_type 299 #define if_addrlen if_data.ifi_addrlen 300 #define if_hdrlen if_data.ifi_hdrlen 301 #define if_metric if_data.ifi_metric 302 #define if_link_state if_data.ifi_link_state 303 #define if_baudrate if_data.ifi_baudrate 304 #define if_ipackets if_data.ifi_ipackets 305 #define if_ierrors if_data.ifi_ierrors 306 #define if_opackets if_data.ifi_opackets 307 #define if_oerrors if_data.ifi_oerrors 308 #define if_collisions if_data.ifi_collisions 309 #define if_ibytes if_data.ifi_ibytes 310 #define if_obytes if_data.ifi_obytes 311 #define if_imcasts if_data.ifi_imcasts 312 #define if_omcasts if_data.ifi_omcasts 313 #define if_iqdrops if_data.ifi_iqdrops 314 #define if_noproto if_data.ifi_noproto 315 #define if_lastchange if_data.ifi_lastchange 316 317 #define IFF_UP 0x0001 /* interface is up */ 318 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 319 #define IFF_DEBUG 0x0004 /* turn on debugging */ 320 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 321 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 322 #define IFF_NOTRAILERS 0x0020 /* avoid use of trailers */ 323 #define IFF_RUNNING 0x0040 /* resources allocated */ 324 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 325 #define IFF_PROMISC 0x0100 /* receive all packets */ 326 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 327 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 328 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 329 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 330 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 331 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 332 #define IFF_MULTICAST 0x8000 /* supports multicast */ 333 334 #define IFFBITS \ 335 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS" \ 336 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 337 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 338 339 /* flags set internally only: */ 340 #define IFF_CANTCHANGE \ 341 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 342 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 343 344 /* 345 * Some convenience macros used for setting ifi_baudrate. 346 * XXX 1000 vs. 1024? --thorpej (at) NetBSD.org 347 */ 348 #define IF_Kbps(x) ((x) * 1000) /* kilobits/sec. */ 349 #define IF_Mbps(x) (IF_Kbps((x) * 1000)) /* megabits/sec. */ 350 #define IF_Gbps(x) (IF_Mbps((x) * 1000)) /* gigabits/sec. */ 351 352 /* Capabilities that interfaces can advertise. */ 353 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 354 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 355 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 356 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 357 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 358 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 359 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 360 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 361 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 362 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 363 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 364 365 #define IFCAPBITS \ 366 "\020" \ 367 "\10TSO4" \ 368 "\11IP4CSUM_Rx" \ 369 "\12IP4CSUM_Tx" \ 370 "\13TCP4CSUM_Rx" \ 371 "\14TCP4CSUM_Tx" \ 372 "\15UDP4CSUM_Rx" \ 373 "\16UDP4CSUM_Tx" \ 374 "\17TCP6CSUM_Rx" \ 375 "\20TCP6CSUM_Tx" \ 376 "\21UDP6CSUM_Rx" \ 377 "\22UDP6CSUM_Tx" 378 379 /* 380 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 381 * input routines have queues of messages stored on ifqueue structures 382 * (defined above). Entries are added to and deleted from these structures 383 * by these macros, which should be called with ipl raised to splnet(). 384 */ 385 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 386 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 387 #define IF_ENQUEUE(ifq, m) do { \ 388 (m)->m_nextpkt = 0; \ 389 if ((ifq)->ifq_tail == 0) \ 390 (ifq)->ifq_head = m; \ 391 else \ 392 (ifq)->ifq_tail->m_nextpkt = m; \ 393 (ifq)->ifq_tail = m; \ 394 (ifq)->ifq_len++; \ 395 } while (/*CONSTCOND*/0) 396 #define IF_PREPEND(ifq, m) do { \ 397 (m)->m_nextpkt = (ifq)->ifq_head; \ 398 if ((ifq)->ifq_tail == 0) \ 399 (ifq)->ifq_tail = (m); \ 400 (ifq)->ifq_head = (m); \ 401 (ifq)->ifq_len++; \ 402 } while (/*CONSTCOND*/0) 403 #define IF_DEQUEUE(ifq, m) do { \ 404 (m) = (ifq)->ifq_head; \ 405 if (m) { \ 406 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 407 (ifq)->ifq_tail = 0; \ 408 (m)->m_nextpkt = 0; \ 409 (ifq)->ifq_len--; \ 410 } \ 411 } while (/*CONSTCOND*/0) 412 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 413 #define IF_PURGE(ifq) \ 414 do { \ 415 struct mbuf *__m0; \ 416 \ 417 for (;;) { \ 418 IF_DEQUEUE((ifq), __m0); \ 419 if (__m0 == NULL) \ 420 break; \ 421 else \ 422 m_freem(__m0); \ 423 } \ 424 } while (/*CONSTCOND*/ 0) 425 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 426 427 #ifndef IFQ_MAXLEN 428 #define IFQ_MAXLEN 256 429 #endif 430 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 431 432 /* 433 * Structure defining statistics and other data kept regarding an address 434 * on a network interface. 435 */ 436 struct ifaddr_data { 437 int64_t ifad_inbytes; 438 int64_t ifad_outbytes; 439 }; 440 441 /* 442 * The ifaddr structure contains information about one address 443 * of an interface. They are maintained by the different address families, 444 * are allocated and attached when an address is set, and are linked 445 * together so all addresses for an interface can be located. 446 */ 447 struct ifaddr { 448 struct sockaddr *ifa_addr; /* address of interface */ 449 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 450 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 451 struct sockaddr *ifa_netmask; /* used to determine subnet */ 452 struct ifnet *ifa_ifp; /* back-pointer to interface */ 453 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 454 struct ifaddr_data ifa_data; /* statistics on the address */ 455 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 456 __P((int, struct rtentry *, struct rt_addrinfo *)); 457 u_int ifa_flags; /* mostly rt_flags for cloning */ 458 int ifa_refcnt; /* count of references */ 459 int ifa_metric; /* cost of going out this interface */ 460 }; 461 #define IFA_ROUTE RTF_UP /* 0x01 *//* route installed */ 462 463 /* 464 * Message format for use in obtaining information about interfaces 465 * from sysctl and the routing socket. 466 */ 467 struct if_msghdr { 468 u_short ifm_msglen; /* to skip over non-understood messages */ 469 u_char ifm_version; /* future binary compatibility */ 470 u_char ifm_type; /* message type */ 471 int ifm_addrs; /* like rtm_addrs */ 472 int ifm_flags; /* value of if_flags */ 473 u_short ifm_index; /* index for associated ifp */ 474 struct if_data ifm_data;/* statistics and other data about if */ 475 }; 476 477 #if defined(_KERNEL) && defined(COMPAT_14) 478 /* pre-1.5 if_msghdr (ifm_data changed) */ 479 struct if_msghdr14 { 480 u_short ifm_msglen; /* to skip over non-understood messages */ 481 u_char ifm_version; /* future binary compatibility */ 482 u_char ifm_type; /* message type */ 483 int ifm_addrs; /* like rtm_addrs */ 484 int ifm_flags; /* value of if_flags */ 485 u_short ifm_index; /* index for associated ifp */ 486 struct if_data14 ifm_data; /* statistics and other data about if */ 487 }; 488 #endif /* _KERNEL && COMPAT_14 */ 489 490 /* 491 * Message format for use in obtaining information about interface addresses 492 * from sysctl and the routing socket. 493 */ 494 struct ifa_msghdr { 495 u_short ifam_msglen; /* to skip over non-understood messages */ 496 u_char ifam_version; /* future binary compatibility */ 497 u_char ifam_type; /* message type */ 498 int ifam_addrs; /* like rtm_addrs */ 499 int ifam_flags; /* value of ifa_flags */ 500 u_short ifam_index; /* index for associated ifp */ 501 int ifam_metric; /* value of ifa_metric */ 502 }; 503 504 /* 505 * Message format announcing the arrival or departure of a network interface. 506 */ 507 struct if_announcemsghdr { 508 u_short ifan_msglen; /* to skip over non-understood messages */ 509 u_char ifan_version; /* future binary compatibility */ 510 u_char ifan_type; /* message type */ 511 u_short ifan_index; /* index for associated ifp */ 512 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 513 u_short ifan_what; /* what type of announcement */ 514 }; 515 516 #define IFAN_ARRIVAL 0 /* interface arrival */ 517 #define IFAN_DEPARTURE 1 /* interface departure */ 518 519 /* 520 * Interface request structure used for socket 521 * ioctl's. All interface ioctl's must have parameter 522 * definitions which begin with ifr_name. The 523 * remainder may be interface specific. 524 */ 525 struct ifreq { 526 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 527 union { 528 struct sockaddr ifru_addr; 529 struct sockaddr ifru_dstaddr; 530 struct sockaddr ifru_broadaddr; 531 short ifru_flags; 532 int ifru_metric; 533 int ifru_mtu; 534 int ifru_dlt; 535 u_int ifru_value; 536 caddr_t ifru_data; 537 struct { 538 uint32_t b_buflen; 539 void *b_buf; 540 } ifru_b; 541 } ifr_ifru; 542 #define ifr_addr ifr_ifru.ifru_addr /* address */ 543 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 544 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 545 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 546 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 547 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 548 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 549 #define ifr_value ifr_ifru.ifru_value /* generic value */ 550 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 551 #define ifr_data ifr_ifru.ifru_data /* for use by interface 552 * XXX deprecated 553 */ 554 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 555 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 556 }; 557 558 struct ifcapreq { 559 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 560 uint64_t ifcr_capabilities; /* supported capabiliites */ 561 uint64_t ifcr_capenable; /* capabilities enabled */ 562 }; 563 564 struct ifaliasreq { 565 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 566 struct sockaddr ifra_addr; 567 struct sockaddr ifra_dstaddr; 568 #define ifra_broadaddr ifra_dstaddr 569 struct sockaddr ifra_mask; 570 }; 571 572 struct ifdatareq { 573 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 574 struct if_data ifdr_data; 575 }; 576 577 struct ifmediareq { 578 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 579 int ifm_current; /* current media options */ 580 int ifm_mask; /* don't care mask */ 581 int ifm_status; /* media status */ 582 int ifm_active; /* active options */ 583 int ifm_count; /* # entries in ifm_ulist 584 array */ 585 int *ifm_ulist; /* media words */ 586 }; 587 588 589 struct ifdrv { 590 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 591 unsigned long ifd_cmd; 592 size_t ifd_len; 593 void *ifd_data; 594 }; 595 596 /* 597 * Structure used in SIOCGIFCONF request. 598 * Used to retrieve interface configuration 599 * for machine (useful for programs which 600 * must know all networks accessible). 601 */ 602 struct ifconf { 603 int ifc_len; /* size of associated buffer */ 604 union { 605 caddr_t ifcu_buf; 606 struct ifreq *ifcu_req; 607 } ifc_ifcu; 608 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 609 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 610 }; 611 612 /* 613 * Structure for SIOC[AGD]LIFADDR 614 */ 615 struct if_laddrreq { 616 char iflr_name[IFNAMSIZ]; 617 unsigned int flags; 618 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 619 unsigned int prefixlen; /* in/out */ 620 struct sockaddr_storage addr; /* in/out */ 621 struct sockaddr_storage dstaddr; /* out */ 622 }; 623 624 #include <net/if_arp.h> 625 626 #endif /* _NETBSD_SOURCE */ 627 628 #ifdef _KERNEL 629 #ifdef IFAREF_DEBUG 630 #define IFAREF(ifa) \ 631 do { \ 632 printf("IFAREF: %s:%d %p -> %d\n", __FILE__, __LINE__, \ 633 (ifa), ++(ifa)->ifa_refcnt); \ 634 } while (/*CONSTCOND*/ 0) 635 636 #define IFAFREE(ifa) \ 637 do { \ 638 if ((ifa)->ifa_refcnt <= 0) \ 639 panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \ 640 __LINE__, (ifa)); \ 641 printf("IFAFREE: %s:%d %p -> %d\n", __FILE__, __LINE__, \ 642 (ifa), --(ifa)->ifa_refcnt); \ 643 if ((ifa)->ifa_refcnt == 0) \ 644 ifafree(ifa); \ 645 } while (/*CONSTCOND*/ 0) 646 #else 647 #define IFAREF(ifa) (ifa)->ifa_refcnt++ 648 649 #ifdef DIAGNOSTIC 650 #define IFAFREE(ifa) \ 651 do { \ 652 if ((ifa)->ifa_refcnt <= 0) \ 653 panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \ 654 __LINE__, (ifa)); \ 655 if (--(ifa)->ifa_refcnt == 0) \ 656 ifafree(ifa); \ 657 } while (/*CONSTCOND*/ 0) 658 #else 659 #define IFAFREE(ifa) \ 660 do { \ 661 if (--(ifa)->ifa_refcnt == 0) \ 662 ifafree(ifa); \ 663 } while (/*CONSTCOND*/ 0) 664 #endif /* DIAGNOSTIC */ 665 #endif /* IFAREF_DEBUG */ 666 667 #ifdef ALTQ 668 #define ALTQ_DECL(x) x 669 #define ALTQ_COMMA , 670 671 #define IFQ_ENQUEUE(ifq, m, pattr, err) \ 672 do { \ 673 if (ALTQ_IS_ENABLED((ifq))) \ 674 ALTQ_ENQUEUE((ifq), (m), (pattr), (err)); \ 675 else { \ 676 if (IF_QFULL((ifq))) { \ 677 m_freem((m)); \ 678 (err) = ENOBUFS; \ 679 } else { \ 680 IF_ENQUEUE((ifq), (m)); \ 681 (err) = 0; \ 682 } \ 683 } \ 684 if ((err)) \ 685 (ifq)->ifq_drops++; \ 686 } while (/*CONSTCOND*/ 0) 687 688 #define IFQ_DEQUEUE(ifq, m) \ 689 do { \ 690 if (TBR_IS_ENABLED((ifq))) \ 691 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 692 else if (ALTQ_IS_ENABLED((ifq))) \ 693 ALTQ_DEQUEUE((ifq), (m)); \ 694 else \ 695 IF_DEQUEUE((ifq), (m)); \ 696 } while (/*CONSTCOND*/ 0) 697 698 #define IFQ_POLL(ifq, m) \ 699 do { \ 700 if (TBR_IS_ENABLED((ifq))) \ 701 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 702 else if (ALTQ_IS_ENABLED((ifq))) \ 703 ALTQ_POLL((ifq), (m)); \ 704 else \ 705 IF_POLL((ifq), (m)); \ 706 } while (/*CONSTCOND*/ 0) 707 708 #define IFQ_PURGE(ifq) \ 709 do { \ 710 if (ALTQ_IS_ENABLED((ifq))) \ 711 ALTQ_PURGE((ifq)); \ 712 else \ 713 IF_PURGE((ifq)); \ 714 } while (/*CONSTCOND*/ 0) 715 716 #define IFQ_SET_READY(ifq) \ 717 do { \ 718 (ifq)->altq_flags |= ALTQF_READY; \ 719 } while (/*CONSTCOND*/ 0) 720 721 #define IFQ_CLASSIFY(ifq, m, af, pattr) \ 722 do { \ 723 if (ALTQ_IS_ENABLED((ifq))) { \ 724 if (ALTQ_NEEDS_CLASSIFY((ifq))) \ 725 (pattr)->pattr_class = (*(ifq)->altq_classify) \ 726 ((ifq)->altq_clfier, (m), (af)); \ 727 (pattr)->pattr_af = (af); \ 728 (pattr)->pattr_hdr = mtod((m), caddr_t); \ 729 } \ 730 } while (/*CONSTCOND*/ 0) 731 #else /* ! ALTQ */ 732 #define ALTQ_DECL(x) /* nothing */ 733 #define ALTQ_COMMA 734 735 #define IFQ_ENQUEUE(ifq, m, pattr, err) \ 736 do { \ 737 if (IF_QFULL((ifq))) { \ 738 m_freem((m)); \ 739 (err) = ENOBUFS; \ 740 } else { \ 741 IF_ENQUEUE((ifq), (m)); \ 742 (err) = 0; \ 743 } \ 744 if ((err)) \ 745 (ifq)->ifq_drops++; \ 746 } while (/*CONSTCOND*/ 0) 747 748 #define IFQ_DEQUEUE(ifq, m) IF_DEQUEUE((ifq), (m)) 749 750 #define IFQ_POLL(ifq, m) IF_POLL((ifq), (m)) 751 752 #define IFQ_PURGE(ifq) IF_PURGE((ifq)) 753 754 #define IFQ_SET_READY(ifq) /* nothing */ 755 756 #define IFQ_CLASSIFY(ifq, m, af, pattr) /* nothing */ 757 758 #endif /* ALTQ */ 759 760 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY((ifq)) 761 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 762 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 763 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 764 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 765 766 #include <sys/mallocvar.h> 767 MALLOC_DECLARE(M_IFADDR); 768 MALLOC_DECLARE(M_IFMADDR); 769 770 #define IFNET_FOREACH(ifp) TAILQ_FOREACH(ifp, &ifnet, if_list) 771 #define IFADDR_FOREACH(ifa, ifp) TAILQ_FOREACH(ifa, \ 772 &(ifp)->if_addrlist, ifa_list) 773 774 extern struct ifnet_head ifnet; 775 extern struct ifnet **ifindex2ifnet; 776 extern struct ifnet *lo0ifp; 777 extern size_t if_indexlim; 778 779 char *ether_sprintf __P((const u_char *)); 780 781 void if_alloc_sadl __P((struct ifnet *)); 782 void if_free_sadl __P((struct ifnet *)); 783 void if_attach __P((struct ifnet *)); 784 void if_attachdomain __P((void)); 785 void if_attachdomain1 __P((struct ifnet *)); 786 void if_deactivate __P((struct ifnet *)); 787 void if_detach __P((struct ifnet *)); 788 void if_down __P((struct ifnet *)); 789 void if_link_state_change(struct ifnet *, int); 790 void if_slowtimo __P((void *)); 791 void if_up __P((struct ifnet *)); 792 int ifconf __P((u_long, caddr_t)); 793 void ifinit __P((void)); 794 int ifioctl __P((struct socket *, u_long, caddr_t, struct proc *)); 795 int ifpromisc __P((struct ifnet *, int)); 796 struct ifnet *ifunit __P((const char *)); 797 798 struct ifaddr *ifa_ifwithaddr __P((const struct sockaddr *)); 799 struct ifaddr *ifa_ifwithaf __P((int)); 800 struct ifaddr *ifa_ifwithdstaddr __P((const struct sockaddr *)); 801 struct ifaddr *ifa_ifwithnet __P((const struct sockaddr *)); 802 struct ifaddr *ifa_ifwithladdr __P((const struct sockaddr *)); 803 struct ifaddr *ifa_ifwithroute __P((int, const struct sockaddr *, 804 const struct sockaddr *)); 805 struct ifaddr *ifaof_ifpforaddr __P((const struct sockaddr *, struct ifnet *)); 806 void ifafree __P((struct ifaddr *)); 807 void link_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 808 809 void if_clone_attach __P((struct if_clone *)); 810 void if_clone_detach __P((struct if_clone *)); 811 812 int if_clone_create __P((const char *)); 813 int if_clone_destroy __P((const char *)); 814 815 int ifq_enqueue(struct ifnet *, struct mbuf * ALTQ_COMMA 816 ALTQ_DECL(struct altq_pktattr *)); 817 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf * ALTQ_COMMA 818 ALTQ_DECL(struct altq_pktattr *)); 819 820 int loioctl __P((struct ifnet *, u_long, caddr_t)); 821 void loopattach __P((int)); 822 int looutput __P((struct ifnet *, 823 struct mbuf *, struct sockaddr *, struct rtentry *)); 824 void lortrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 825 826 /* 827 * These are exported because they're an easy way to tell if 828 * an interface is going away without having to burn a flag. 829 */ 830 int if_nulloutput __P((struct ifnet *, struct mbuf *, 831 struct sockaddr *, struct rtentry *)); 832 void if_nullinput __P((struct ifnet *, struct mbuf *)); 833 void if_nullstart __P((struct ifnet *)); 834 int if_nullioctl __P((struct ifnet *, u_long, caddr_t)); 835 int if_nullinit __P((struct ifnet *)); 836 void if_nullstop __P((struct ifnet *, int)); 837 void if_nullwatchdog __P((struct ifnet *)); 838 void if_nulldrain __P((struct ifnet *)); 839 #else 840 struct if_nameindex { 841 unsigned int if_index; /* 1, 2, ... */ 842 char *if_name; /* null terminated name: "le0", ... */ 843 }; 844 845 #include <sys/cdefs.h> 846 __BEGIN_DECLS 847 unsigned int if_nametoindex __P((const char *)); 848 char * if_indextoname __P((unsigned int, char *)); 849 struct if_nameindex * if_nameindex __P((void)); 850 void if_freenameindex __P((struct if_nameindex *)); 851 __END_DECLS 852 #endif /* _KERNEL */ /* XXX really ALTQ? */ 853 854 #ifdef _KERNEL 855 /* 856 * ifq sysctl support 857 */ 858 int sysctl_ifq __P((int *name, u_int namelen, void *oldp, 859 size_t *oldlenp, void *newp, size_t newlen, 860 struct ifqueue *ifq)); 861 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 862 #define IFQCTL_LEN 1 863 #define IFQCTL_MAXLEN 2 864 #define IFQCTL_PEAK 3 865 #define IFQCTL_DROPS 4 866 #define IFQCTL_MAXID 5 867 868 #endif /* _KERNEL */ 869 870 #ifdef _NETBSD_SOURCE 871 /* 872 * sysctl for ifq (per-protocol packet input queue variant of ifqueue) 873 */ 874 #define CTL_IFQ_NAMES { \ 875 { 0, 0 }, \ 876 { "len", CTLTYPE_INT }, \ 877 { "maxlen", CTLTYPE_INT }, \ 878 { "peak", CTLTYPE_INT }, \ 879 { "drops", CTLTYPE_INT }, \ 880 } 881 #endif /* _NETBSD_SOURCE */ 882 #endif /* !_NET_IF_H_ */ 883
Indexes created Sat Sep 20 22:09:52 GMT 2025