if.h revision 1.120
1 /* $NetBSD: if.h,v 1.120 2006/11/13 05:13:40 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 * 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 #endif 126 127 struct mbuf; 128 struct proc; 129 struct rtentry; 130 struct socket; 131 struct ether_header; 132 struct ifaddr; 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 { { NULL, NULL }, 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 (struct ifnet *, struct mbuf *, struct sockaddr *, 259 struct rtentry *); 260 void (*if_input) /* input routine (from h/w driver) */ 261 (struct ifnet *, struct mbuf *); 262 void (*if_start) /* initiate output routine */ 263 (struct ifnet *); 264 int (*if_ioctl) /* ioctl routine */ 265 (struct ifnet *, u_long, caddr_t); 266 int (*if_init) /* init routine */ 267 (struct ifnet *); 268 void (*if_stop) /* stop routine */ 269 (struct ifnet *, int); 270 void (*if_watchdog) /* timer routine */ 271 (struct ifnet *); 272 void (*if_drain) /* routine to release resources */ 273 (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 union { 283 caddr_t carp_s; /* carp structure (used by !carp ifs) */ 284 struct ifnet *carp_d;/* ptr to carpdev (used by carp ifs) */ 285 } if_carp_ptr; 286 #define if_carp if_carp_ptr.carp_s 287 #define if_carpdev if_carp_ptr.carp_d 288 /* 289 * These are pre-computed based on an interfaces enabled 290 * capabilities, for speed elsewhere. 291 */ 292 int if_csum_flags_tx; /* M_CSUM_* flags for Tx */ 293 int if_csum_flags_rx; /* M_CSUM_* flags for Rx */ 294 295 void *if_afdata[AF_MAX]; 296 struct mowner *if_mowner; /* who owns mbufs for this interface */ 297 298 void *if_agrprivate; /* used only when #if NAGR > 0 */ 299 }; 300 #define if_mtu if_data.ifi_mtu 301 #define if_type if_data.ifi_type 302 #define if_addrlen if_data.ifi_addrlen 303 #define if_hdrlen if_data.ifi_hdrlen 304 #define if_metric if_data.ifi_metric 305 #define if_link_state if_data.ifi_link_state 306 #define if_baudrate if_data.ifi_baudrate 307 #define if_ipackets if_data.ifi_ipackets 308 #define if_ierrors if_data.ifi_ierrors 309 #define if_opackets if_data.ifi_opackets 310 #define if_oerrors if_data.ifi_oerrors 311 #define if_collisions if_data.ifi_collisions 312 #define if_ibytes if_data.ifi_ibytes 313 #define if_obytes if_data.ifi_obytes 314 #define if_imcasts if_data.ifi_imcasts 315 #define if_omcasts if_data.ifi_omcasts 316 #define if_iqdrops if_data.ifi_iqdrops 317 #define if_noproto if_data.ifi_noproto 318 #define if_lastchange if_data.ifi_lastchange 319 320 #define IFF_UP 0x0001 /* interface is up */ 321 #define IFF_BROADCAST 0x0002 /* broadcast address valid */ 322 #define IFF_DEBUG 0x0004 /* turn on debugging */ 323 #define IFF_LOOPBACK 0x0008 /* is a loopback net */ 324 #define IFF_POINTOPOINT 0x0010 /* interface is point-to-point link */ 325 #define IFF_NOTRAILERS 0x0020 /* avoid use of trailers */ 326 #define IFF_RUNNING 0x0040 /* resources allocated */ 327 #define IFF_NOARP 0x0080 /* no address resolution protocol */ 328 #define IFF_PROMISC 0x0100 /* receive all packets */ 329 #define IFF_ALLMULTI 0x0200 /* receive all multicast packets */ 330 #define IFF_OACTIVE 0x0400 /* transmission in progress */ 331 #define IFF_SIMPLEX 0x0800 /* can't hear own transmissions */ 332 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 333 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 334 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 335 #define IFF_MULTICAST 0x8000 /* supports multicast */ 336 337 #define IFFBITS \ 338 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS" \ 339 "\7RUNNING\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX" \ 340 "\15LINK0\16LINK1\17LINK2\20MULTICAST" 341 342 /* flags set internally only: */ 343 #define IFF_CANTCHANGE \ 344 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 345 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) 346 347 /* 348 * Some convenience macros used for setting ifi_baudrate. 349 * XXX 1000 vs. 1024? --thorpej (at) NetBSD.org 350 */ 351 #define IF_Kbps(x) ((x) * 1000) /* kilobits/sec. */ 352 #define IF_Mbps(x) (IF_Kbps((x) * 1000)) /* megabits/sec. */ 353 #define IF_Gbps(x) (IF_Mbps((x) * 1000)) /* gigabits/sec. */ 354 355 /* Capabilities that interfaces can advertise. */ 356 #define IFCAP_TSOv4 0x00080 /* can do TCPv4 segmentation offload */ 357 #define IFCAP_CSUM_IPv4_Rx 0x00100 /* can do IPv4 header checksums (Rx) */ 358 #define IFCAP_CSUM_IPv4_Tx 0x00200 /* can do IPv4 header checksums (Tx) */ 359 #define IFCAP_CSUM_TCPv4_Rx 0x00400 /* can do IPv4/TCP checksums (Rx) */ 360 #define IFCAP_CSUM_TCPv4_Tx 0x00800 /* can do IPv4/TCP checksums (Tx) */ 361 #define IFCAP_CSUM_UDPv4_Rx 0x01000 /* can do IPv4/UDP checksums (Rx) */ 362 #define IFCAP_CSUM_UDPv4_Tx 0x02000 /* can do IPv4/UDP checksums (Tx) */ 363 #define IFCAP_CSUM_TCPv6_Rx 0x04000 /* can do IPv6/TCP checksums (Rx) */ 364 #define IFCAP_CSUM_TCPv6_Tx 0x08000 /* can do IPv6/TCP checksums (Tx) */ 365 #define IFCAP_CSUM_UDPv6_Rx 0x10000 /* can do IPv6/UDP checksums (Rx) */ 366 #define IFCAP_CSUM_UDPv6_Tx 0x20000 /* can do IPv6/UDP checksums (Tx) */ 367 368 #define IFCAPBITS \ 369 "\020" \ 370 "\10TSO4" \ 371 "\11IP4CSUM_Rx" \ 372 "\12IP4CSUM_Tx" \ 373 "\13TCP4CSUM_Rx" \ 374 "\14TCP4CSUM_Tx" \ 375 "\15UDP4CSUM_Rx" \ 376 "\16UDP4CSUM_Tx" \ 377 "\17TCP6CSUM_Rx" \ 378 "\20TCP6CSUM_Tx" \ 379 "\21UDP6CSUM_Rx" \ 380 "\22UDP6CSUM_Tx" 381 382 /* 383 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 384 * input routines have queues of messages stored on ifqueue structures 385 * (defined above). Entries are added to and deleted from these structures 386 * by these macros, which should be called with ipl raised to splnet(). 387 */ 388 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 389 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 390 #define IF_ENQUEUE(ifq, m) do { \ 391 (m)->m_nextpkt = 0; \ 392 if ((ifq)->ifq_tail == 0) \ 393 (ifq)->ifq_head = m; \ 394 else \ 395 (ifq)->ifq_tail->m_nextpkt = m; \ 396 (ifq)->ifq_tail = m; \ 397 (ifq)->ifq_len++; \ 398 } while (/*CONSTCOND*/0) 399 #define IF_PREPEND(ifq, m) do { \ 400 (m)->m_nextpkt = (ifq)->ifq_head; \ 401 if ((ifq)->ifq_tail == 0) \ 402 (ifq)->ifq_tail = (m); \ 403 (ifq)->ifq_head = (m); \ 404 (ifq)->ifq_len++; \ 405 } while (/*CONSTCOND*/0) 406 #define IF_DEQUEUE(ifq, m) do { \ 407 (m) = (ifq)->ifq_head; \ 408 if (m) { \ 409 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 410 (ifq)->ifq_tail = 0; \ 411 (m)->m_nextpkt = 0; \ 412 (ifq)->ifq_len--; \ 413 } \ 414 } while (/*CONSTCOND*/0) 415 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 416 #define IF_PURGE(ifq) \ 417 do { \ 418 struct mbuf *__m0; \ 419 \ 420 for (;;) { \ 421 IF_DEQUEUE((ifq), __m0); \ 422 if (__m0 == NULL) \ 423 break; \ 424 else \ 425 m_freem(__m0); \ 426 } \ 427 } while (/*CONSTCOND*/ 0) 428 #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 429 430 #ifndef IFQ_MAXLEN 431 #define IFQ_MAXLEN 256 432 #endif 433 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 434 435 /* 436 * Structure defining statistics and other data kept regarding an address 437 * on a network interface. 438 */ 439 struct ifaddr_data { 440 int64_t ifad_inbytes; 441 int64_t ifad_outbytes; 442 }; 443 444 /* 445 * The ifaddr structure contains information about one address 446 * of an interface. They are maintained by the different address families, 447 * are allocated and attached when an address is set, and are linked 448 * together so all addresses for an interface can be located. 449 */ 450 struct ifaddr { 451 struct sockaddr *ifa_addr; /* address of interface */ 452 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 453 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 454 struct sockaddr *ifa_netmask; /* used to determine subnet */ 455 struct ifnet *ifa_ifp; /* back-pointer to interface */ 456 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 457 struct ifaddr_data ifa_data; /* statistics on the address */ 458 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 459 (int, struct rtentry *, struct rt_addrinfo *); 460 u_int ifa_flags; /* mostly rt_flags for cloning */ 461 int ifa_refcnt; /* count of references */ 462 int ifa_metric; /* cost of going out this interface */ 463 struct ifaddr *(*ifa_getifa)(struct ifaddr *, 464 const struct sockaddr *); 465 uint32_t *ifa_seqno; 466 int16_t ifa_preference; /* preference level for this address */ 467 }; 468 #define IFA_ROUTE RTF_UP /* 0x01 *//* route installed */ 469 470 /* 471 * Message format for use in obtaining information about interfaces 472 * from sysctl and the routing socket. 473 */ 474 struct if_msghdr { 475 u_short ifm_msglen; /* to skip over non-understood messages */ 476 u_char ifm_version; /* future binary compatibility */ 477 u_char ifm_type; /* message type */ 478 int ifm_addrs; /* like rtm_addrs */ 479 int ifm_flags; /* value of if_flags */ 480 u_short ifm_index; /* index for associated ifp */ 481 struct if_data ifm_data;/* statistics and other data about if */ 482 }; 483 484 #if defined(_KERNEL) && defined(COMPAT_14) 485 /* pre-1.5 if_msghdr (ifm_data changed) */ 486 struct if_msghdr14 { 487 u_short ifm_msglen; /* to skip over non-understood messages */ 488 u_char ifm_version; /* future binary compatibility */ 489 u_char ifm_type; /* message type */ 490 int ifm_addrs; /* like rtm_addrs */ 491 int ifm_flags; /* value of if_flags */ 492 u_short ifm_index; /* index for associated ifp */ 493 struct if_data14 ifm_data; /* statistics and other data about if */ 494 }; 495 #endif /* _KERNEL && COMPAT_14 */ 496 497 /* 498 * Message format for use in obtaining information about interface addresses 499 * from sysctl and the routing socket. 500 */ 501 struct ifa_msghdr { 502 u_short ifam_msglen; /* to skip over non-understood messages */ 503 u_char ifam_version; /* future binary compatibility */ 504 u_char ifam_type; /* message type */ 505 int ifam_addrs; /* like rtm_addrs */ 506 int ifam_flags; /* value of ifa_flags */ 507 u_short ifam_index; /* index for associated ifp */ 508 int ifam_metric; /* value of ifa_metric */ 509 }; 510 511 /* 512 * Message format announcing the arrival or departure of a network interface. 513 */ 514 struct if_announcemsghdr { 515 u_short ifan_msglen; /* to skip over non-understood messages */ 516 u_char ifan_version; /* future binary compatibility */ 517 u_char ifan_type; /* message type */ 518 u_short ifan_index; /* index for associated ifp */ 519 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 520 u_short ifan_what; /* what type of announcement */ 521 }; 522 523 #define IFAN_ARRIVAL 0 /* interface arrival */ 524 #define IFAN_DEPARTURE 1 /* interface departure */ 525 526 /* 527 * Interface request structure used for socket 528 * ioctl's. All interface ioctl's must have parameter 529 * definitions which begin with ifr_name. The 530 * remainder may be interface specific. 531 */ 532 struct ifreq { 533 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 534 union { 535 struct sockaddr ifru_addr; 536 struct sockaddr ifru_dstaddr; 537 struct sockaddr ifru_broadaddr; 538 short ifru_flags; 539 int ifru_metric; 540 int ifru_mtu; 541 int ifru_dlt; 542 u_int ifru_value; 543 caddr_t ifru_data; 544 struct { 545 uint32_t b_buflen; 546 void *b_buf; 547 } ifru_b; 548 } ifr_ifru; 549 #define ifr_addr ifr_ifru.ifru_addr /* address */ 550 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 551 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 552 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 553 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 554 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 555 #define ifr_dlt ifr_ifru.ifru_dlt /* data link type (DLT_*) */ 556 #define ifr_value ifr_ifru.ifru_value /* generic value */ 557 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 558 #define ifr_data ifr_ifru.ifru_data /* for use by interface 559 * XXX deprecated 560 */ 561 #define ifr_buf ifr_ifru.ifru_b.b_buf /* new interface ioctls */ 562 #define ifr_buflen ifr_ifru.ifru_b.b_buflen 563 }; 564 565 struct ifcapreq { 566 char ifcr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 567 uint64_t ifcr_capabilities; /* supported capabiliites */ 568 uint64_t ifcr_capenable; /* capabilities enabled */ 569 }; 570 571 struct ifaliasreq { 572 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 573 struct sockaddr ifra_addr; 574 struct sockaddr ifra_dstaddr; 575 #define ifra_broadaddr ifra_dstaddr 576 struct sockaddr ifra_mask; 577 }; 578 579 struct ifdatareq { 580 char ifdr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 581 struct if_data ifdr_data; 582 }; 583 584 struct ifmediareq { 585 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 586 int ifm_current; /* current media options */ 587 int ifm_mask; /* don't care mask */ 588 int ifm_status; /* media status */ 589 int ifm_active; /* active options */ 590 int ifm_count; /* # entries in ifm_ulist 591 array */ 592 int *ifm_ulist; /* media words */ 593 }; 594 595 596 struct ifdrv { 597 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 598 unsigned long ifd_cmd; 599 size_t ifd_len; 600 void *ifd_data; 601 }; 602 603 /* 604 * Structure used in SIOCGIFCONF request. 605 * Used to retrieve interface configuration 606 * for machine (useful for programs which 607 * must know all networks accessible). 608 */ 609 struct ifconf { 610 int ifc_len; /* size of associated buffer */ 611 union { 612 caddr_t ifcu_buf; 613 struct ifreq *ifcu_req; 614 } ifc_ifcu; 615 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 616 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 617 }; 618 619 /* 620 * Structure for SIOC[AGD]LIFADDR 621 */ 622 struct if_laddrreq { 623 char iflr_name[IFNAMSIZ]; 624 unsigned int flags; 625 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 626 unsigned int prefixlen; /* in/out */ 627 struct sockaddr_storage addr; /* in/out */ 628 struct sockaddr_storage dstaddr; /* out */ 629 }; 630 631 /* 632 * Structure for SIOC[SG]IFADDRPREF 633 */ 634 struct if_addrprefreq { 635 char ifap_name[IFNAMSIZ]; 636 int16_t ifap_preference; /* in/out */ 637 struct sockaddr_storage ifap_addr; /* in/out */ 638 }; 639 640 #include <net/if_arp.h> 641 642 #endif /* _NETBSD_SOURCE */ 643 644 #ifdef _KERNEL 645 #ifdef IFAREF_DEBUG 646 #define IFAREF(ifa) \ 647 do { \ 648 printf("IFAREF: %s:%d %p -> %d\n", __FILE__, __LINE__, \ 649 (ifa), ++(ifa)->ifa_refcnt); \ 650 } while (/*CONSTCOND*/ 0) 651 652 #define IFAFREE(ifa) \ 653 do { \ 654 if ((ifa)->ifa_refcnt <= 0) \ 655 panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \ 656 __LINE__, (ifa)); \ 657 printf("IFAFREE: %s:%d %p -> %d\n", __FILE__, __LINE__, \ 658 (ifa), --(ifa)->ifa_refcnt); \ 659 if ((ifa)->ifa_refcnt == 0) \ 660 ifafree(ifa); \ 661 } while (/*CONSTCOND*/ 0) 662 #else 663 #define IFAREF(ifa) (ifa)->ifa_refcnt++ 664 665 #ifdef DIAGNOSTIC 666 #define IFAFREE(ifa) \ 667 do { \ 668 if ((ifa)->ifa_refcnt <= 0) \ 669 panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \ 670 __LINE__, (ifa)); \ 671 if (--(ifa)->ifa_refcnt == 0) \ 672 ifafree(ifa); \ 673 } while (/*CONSTCOND*/ 0) 674 #else 675 #define IFAFREE(ifa) \ 676 do { \ 677 if (--(ifa)->ifa_refcnt == 0) \ 678 ifafree(ifa); \ 679 } while (/*CONSTCOND*/ 0) 680 #endif /* DIAGNOSTIC */ 681 #endif /* IFAREF_DEBUG */ 682 683 #ifdef ALTQ 684 #define ALTQ_DECL(x) x 685 #define ALTQ_COMMA , 686 687 #define IFQ_ENQUEUE(ifq, m, pattr, err) \ 688 do { \ 689 if (ALTQ_IS_ENABLED((ifq))) \ 690 ALTQ_ENQUEUE((ifq), (m), (pattr), (err)); \ 691 else { \ 692 if (IF_QFULL((ifq))) { \ 693 m_freem((m)); \ 694 (err) = ENOBUFS; \ 695 } else { \ 696 IF_ENQUEUE((ifq), (m)); \ 697 (err) = 0; \ 698 } \ 699 } \ 700 if ((err)) \ 701 (ifq)->ifq_drops++; \ 702 } while (/*CONSTCOND*/ 0) 703 704 #define IFQ_DEQUEUE(ifq, m) \ 705 do { \ 706 if (TBR_IS_ENABLED((ifq))) \ 707 (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ 708 else if (ALTQ_IS_ENABLED((ifq))) \ 709 ALTQ_DEQUEUE((ifq), (m)); \ 710 else \ 711 IF_DEQUEUE((ifq), (m)); \ 712 } while (/*CONSTCOND*/ 0) 713 714 #define IFQ_POLL(ifq, m) \ 715 do { \ 716 if (TBR_IS_ENABLED((ifq))) \ 717 (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ 718 else if (ALTQ_IS_ENABLED((ifq))) \ 719 ALTQ_POLL((ifq), (m)); \ 720 else \ 721 IF_POLL((ifq), (m)); \ 722 } while (/*CONSTCOND*/ 0) 723 724 #define IFQ_PURGE(ifq) \ 725 do { \ 726 if (ALTQ_IS_ENABLED((ifq))) \ 727 ALTQ_PURGE((ifq)); \ 728 else \ 729 IF_PURGE((ifq)); \ 730 } while (/*CONSTCOND*/ 0) 731 732 #define IFQ_SET_READY(ifq) \ 733 do { \ 734 (ifq)->altq_flags |= ALTQF_READY; \ 735 } while (/*CONSTCOND*/ 0) 736 737 #define IFQ_CLASSIFY(ifq, m, af, pattr) \ 738 do { \ 739 if (ALTQ_IS_ENABLED((ifq))) { \ 740 if (ALTQ_NEEDS_CLASSIFY((ifq))) \ 741 (pattr)->pattr_class = (*(ifq)->altq_classify) \ 742 ((ifq)->altq_clfier, (m), (af)); \ 743 (pattr)->pattr_af = (af); \ 744 (pattr)->pattr_hdr = mtod((m), caddr_t); \ 745 } \ 746 } while (/*CONSTCOND*/ 0) 747 #else /* ! ALTQ */ 748 #define ALTQ_DECL(x) /* nothing */ 749 #define ALTQ_COMMA 750 751 #define IFQ_ENQUEUE(ifq, m, pattr, err) \ 752 do { \ 753 if (IF_QFULL((ifq))) { \ 754 m_freem((m)); \ 755 (err) = ENOBUFS; \ 756 } else { \ 757 IF_ENQUEUE((ifq), (m)); \ 758 (err) = 0; \ 759 } \ 760 if ((err)) \ 761 (ifq)->ifq_drops++; \ 762 } while (/*CONSTCOND*/ 0) 763 764 #define IFQ_DEQUEUE(ifq, m) IF_DEQUEUE((ifq), (m)) 765 766 #define IFQ_POLL(ifq, m) IF_POLL((ifq), (m)) 767 768 #define IFQ_PURGE(ifq) IF_PURGE((ifq)) 769 770 #define IFQ_SET_READY(ifq) /* nothing */ 771 772 #define IFQ_CLASSIFY(ifq, m, af, pattr) /* nothing */ 773 774 #endif /* ALTQ */ 775 776 #define IFQ_IS_EMPTY(ifq) IF_IS_EMPTY((ifq)) 777 #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 778 #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 779 #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 780 #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 781 782 #include <sys/mallocvar.h> 783 MALLOC_DECLARE(M_IFADDR); 784 MALLOC_DECLARE(M_IFMADDR); 785 786 #define IFNET_FOREACH(ifp) TAILQ_FOREACH(ifp, &ifnet, if_list) 787 #define IFADDR_FOREACH(ifa, ifp) TAILQ_FOREACH(ifa, \ 788 &(ifp)->if_addrlist, ifa_list) 789 790 extern struct ifnet_head ifnet; 791 extern struct ifnet **ifindex2ifnet; 792 extern struct ifnet *lo0ifp; 793 extern size_t if_indexlim; 794 795 void ether_input(struct ifnet *, struct mbuf *); 796 797 void if_alloc_sadl(struct ifnet *); 798 void if_free_sadl(struct ifnet *); 799 void if_attach(struct ifnet *); 800 void if_attachdomain(void); 801 void if_attachdomain1(struct ifnet *); 802 void if_deactivate(struct ifnet *); 803 void if_detach(struct ifnet *); 804 void if_down(struct ifnet *); 805 void if_link_state_change(struct ifnet *, int); 806 void if_slowtimo(void *); 807 void if_up(struct ifnet *); 808 int ifconf(u_long, caddr_t); 809 void ifinit(void); 810 int ifioctl(struct socket *, u_long, caddr_t, struct lwp *); 811 int ifpromisc(struct ifnet *, int); 812 struct ifnet *ifunit(const char *); 813 814 struct ifaddr *ifa_ifwithaddr(const struct sockaddr *); 815 struct ifaddr *ifa_ifwithaf(int); 816 struct ifaddr *ifa_ifwithdstaddr(const struct sockaddr *); 817 struct ifaddr *ifa_ifwithnet(const struct sockaddr *); 818 struct ifaddr *ifa_ifwithladdr(const struct sockaddr *); 819 struct ifaddr *ifa_ifwithroute(int, const struct sockaddr *, 820 const struct sockaddr *); 821 struct ifaddr *ifaof_ifpforaddr(const struct sockaddr *, struct ifnet *); 822 void ifafree(struct ifaddr *); 823 void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 824 825 void if_clone_attach(struct if_clone *); 826 void if_clone_detach(struct if_clone *); 827 828 int if_clone_create(const char *); 829 int if_clone_destroy(const char *); 830 831 int ifq_enqueue(struct ifnet *, struct mbuf * ALTQ_COMMA 832 ALTQ_DECL(struct altq_pktattr *)); 833 int ifq_enqueue2(struct ifnet *, struct ifqueue *, struct mbuf * ALTQ_COMMA 834 ALTQ_DECL(struct altq_pktattr *)); 835 836 int loioctl(struct ifnet *, u_long, caddr_t); 837 void loopattach(int); 838 int looutput(struct ifnet *, 839 struct mbuf *, struct sockaddr *, struct rtentry *); 840 void lortrequest(int, struct rtentry *, struct rt_addrinfo *); 841 842 /* 843 * These are exported because they're an easy way to tell if 844 * an interface is going away without having to burn a flag. 845 */ 846 int if_nulloutput(struct ifnet *, struct mbuf *, 847 struct sockaddr *, struct rtentry *); 848 void if_nullinput(struct ifnet *, struct mbuf *); 849 void if_nullstart(struct ifnet *); 850 int if_nullioctl(struct ifnet *, u_long, caddr_t); 851 int if_nullinit(struct ifnet *); 852 void if_nullstop(struct ifnet *, int); 853 void if_nullwatchdog(struct ifnet *); 854 void if_nulldrain(struct ifnet *); 855 #else 856 struct if_nameindex { 857 unsigned int if_index; /* 1, 2, ... */ 858 char *if_name; /* null terminated name: "le0", ... */ 859 }; 860 861 #include <sys/cdefs.h> 862 __BEGIN_DECLS 863 unsigned int if_nametoindex(const char *); 864 char * if_indextoname(unsigned int, char *); 865 struct if_nameindex * if_nameindex(void); 866 void if_freenameindex(struct if_nameindex *); 867 __END_DECLS 868 #endif /* _KERNEL */ /* XXX really ALTQ? */ 869 870 #ifdef _KERNEL 871 /* 872 * ifq sysctl support 873 */ 874 int sysctl_ifq(int *name, u_int namelen, void *oldp, 875 size_t *oldlenp, void *newp, size_t newlen, 876 struct ifqueue *ifq); 877 /* symbolic names for terminal (per-protocol) CTL_IFQ_ nodes */ 878 #define IFQCTL_LEN 1 879 #define IFQCTL_MAXLEN 2 880 #define IFQCTL_PEAK 3 881 #define IFQCTL_DROPS 4 882 #define IFQCTL_MAXID 5 883 884 #endif /* _KERNEL */ 885 886 #ifdef _NETBSD_SOURCE 887 /* 888 * sysctl for ifq (per-protocol packet input queue variant of ifqueue) 889 */ 890 #define CTL_IFQ_NAMES { \ 891 { 0, 0 }, \ 892 { "len", CTLTYPE_INT }, \ 893 { "maxlen", CTLTYPE_INT }, \ 894 { "peak", CTLTYPE_INT }, \ 895 { "drops", CTLTYPE_INT }, \ 896 } 897 #endif /* _NETBSD_SOURCE */ 898 #endif /* !_NET_IF_H_ */ 899
Indexes created Thu Sep 25 16:09:42 GMT 2025