if.h revision 1.37
1 /* $NetBSD: if.h,v 1.37 1999/07/01 08:12:48 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)if.h 8.3 (Berkeley) 2/9/95 36 */ 37 38 #ifndef _NET_IF_H_ 39 #define _NET_IF_H_ 40 41 #include <sys/queue.h> 42 43 /* 44 * Structures defining a network interface, providing a packet 45 * transport mechanism (ala level 0 of the PUP protocols). 46 * 47 * Each interface accepts output datagrams of a specified maximum 48 * length, and provides higher level routines with input datagrams 49 * received from its medium. 50 * 51 * Output occurs when the routine if_output is called, with four parameters: 52 * (*ifp->if_output)(ifp, m, dst, rt) 53 * Here m is the mbuf chain to be sent and dst is the destination address. 54 * The output routine encapsulates the supplied datagram if necessary, 55 * and then transmits it on its medium. 56 * 57 * On input, each interface unwraps the data received by it, and either 58 * places it on the input queue of a internetwork datagram routine 59 * and posts the associated software interrupt, or passes the datagram to a raw 60 * packet input routine. 61 * 62 * Routines exist for locating interfaces by their addresses 63 * or for locating a interface on a certain network, as well as more general 64 * routing and gateway routines maintaining information used to locate 65 * interfaces. These routines live in the files if.c and route.c 66 */ 67 /* XXX fast fix for SNMP, going away soon */ 68 #include <sys/time.h> 69 70 struct mbuf; 71 struct proc; 72 struct rtentry; 73 struct socket; 74 struct ether_header; 75 76 /* 77 * Structure defining statistics and other data kept regarding a network 78 * interface. 79 */ 80 struct if_data { 81 /* generic interface information */ 82 u_char ifi_type; /* ethernet, tokenring, etc. */ 83 u_char ifi_addrlen; /* media address length */ 84 u_char ifi_hdrlen; /* media header length */ 85 u_long ifi_mtu; /* maximum transmission unit */ 86 u_long ifi_metric; /* routing metric (external only) */ 87 u_long ifi_baudrate; /* linespeed */ 88 /* volatile statistics */ 89 u_long ifi_ipackets; /* packets received on interface */ 90 u_long ifi_ierrors; /* input errors on interface */ 91 u_long ifi_opackets; /* packets sent on interface */ 92 u_long ifi_oerrors; /* output errors on interface */ 93 u_long ifi_collisions; /* collisions on csma interfaces */ 94 u_long ifi_ibytes; /* total number of octets received */ 95 u_long ifi_obytes; /* total number of octets sent */ 96 u_long ifi_imcasts; /* packets received via multicast */ 97 u_long ifi_omcasts; /* packets sent via multicast */ 98 u_long ifi_iqdrops; /* dropped on input, this interface */ 99 u_long ifi_noproto; /* destined for unsupported protocol */ 100 struct timeval ifi_lastchange; /* last updated */ 101 }; 102 103 /* 104 * Structure defining a queue for a network interface. 105 * 106 * (Would like to call this struct ``if'', but C isn't PL/1.) 107 */ 108 TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ 109 110 /* 111 * Length of interface external name, including terminating '\0'. 112 * Note: this is the same size as a generic device's external name. 113 */ 114 #define IFNAMSIZ 16 115 #define IF_NAMESIZE IFNAMSIZ 116 117 struct ifnet { /* and the entries */ 118 void *if_softc; /* lower-level data for this if */ 119 TAILQ_ENTRY(ifnet) if_list; /* all struct ifnets are chained */ 120 TAILQ_HEAD(, ifaddr) if_addrlist; /* linked list of addresses per if */ 121 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 122 int if_pcount; /* number of promiscuous listeners */ 123 caddr_t if_bpf; /* packet filter structure */ 124 u_short if_index; /* numeric abbreviation for this if */ 125 short if_timer; /* time 'til if_watchdog called */ 126 short if_flags; /* up/down, broadcast, etc. */ 127 short if__pad1; /* be nice to m68k ports */ 128 struct if_data if_data; /* statistics and other data about if */ 129 /* procedure handles */ 130 int (*if_output) /* output routine (enqueue) */ 131 __P((struct ifnet *, struct mbuf *, struct sockaddr *, 132 struct rtentry *)); 133 void (*if_input) /* input routine (from h/w driver) */ 134 __P((struct ifnet *, struct mbuf *)); 135 void (*if_start) /* initiate output routine */ 136 __P((struct ifnet *)); 137 int (*if_ioctl) /* ioctl routine */ 138 __P((struct ifnet *, u_long, caddr_t)); 139 int (*if_reset) /* XXX bus reset routine */ 140 __P((struct ifnet *)); 141 void (*if_watchdog) /* timer routine */ 142 __P((struct ifnet *)); 143 void (*if_drain) /* routine to release resources */ 144 __P((struct ifnet *)); 145 struct ifqueue { 146 struct mbuf *ifq_head; 147 struct mbuf *ifq_tail; 148 int ifq_len; 149 int ifq_maxlen; 150 int ifq_drops; 151 } if_snd; /* output queue */ 152 struct sockaddr_dl *if_sadl; /* pointer to our sockaddr_dl */ 153 u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 154 struct ifprefix *if_prefixlist; /* linked list of prefixes per if */ 155 }; 156 #define if_mtu if_data.ifi_mtu 157 #define if_type if_data.ifi_type 158 #define if_addrlen if_data.ifi_addrlen 159 #define if_hdrlen if_data.ifi_hdrlen 160 #define if_metric if_data.ifi_metric 161 #define if_baudrate if_data.ifi_baudrate 162 #define if_ipackets if_data.ifi_ipackets 163 #define if_ierrors if_data.ifi_ierrors 164 #define if_opackets if_data.ifi_opackets 165 #define if_oerrors if_data.ifi_oerrors 166 #define if_collisions if_data.ifi_collisions 167 #define if_ibytes if_data.ifi_ibytes 168 #define if_obytes if_data.ifi_obytes 169 #define if_imcasts if_data.ifi_imcasts 170 #define if_omcasts if_data.ifi_omcasts 171 #define if_iqdrops if_data.ifi_iqdrops 172 #define if_noproto if_data.ifi_noproto 173 #define if_lastchange if_data.ifi_lastchange 174 175 #define IFF_UP 0x1 /* interface is up */ 176 #define IFF_BROADCAST 0x2 /* broadcast address valid */ 177 #define IFF_DEBUG 0x4 /* turn on debugging */ 178 #define IFF_LOOPBACK 0x8 /* is a loopback net */ 179 #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */ 180 #define IFF_NOTRAILERS 0x20 /* avoid use of trailers */ 181 #define IFF_RUNNING 0x40 /* resources allocated */ 182 #define IFF_NOARP 0x80 /* no address resolution protocol */ 183 #define IFF_PROMISC 0x100 /* receive all packets */ 184 #define IFF_ALLMULTI 0x200 /* receive all multicast packets */ 185 #define IFF_OACTIVE 0x400 /* transmission in progress */ 186 #define IFF_SIMPLEX 0x800 /* can't hear own transmissions */ 187 #define IFF_LINK0 0x1000 /* per link layer defined bit */ 188 #define IFF_LINK1 0x2000 /* per link layer defined bit */ 189 #define IFF_LINK2 0x4000 /* per link layer defined bit */ 190 #define IFF_MULTICAST 0x8000 /* supports multicast */ 191 192 /* flags set internally only: */ 193 #define IFF_CANTCHANGE \ 194 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ 195 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI) 196 197 /* 198 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) 199 * input routines have queues of messages stored on ifqueue structures 200 * (defined above). Entries are added to and deleted from these structures 201 * by these macros, which should be called with ipl raised to splimp(). 202 */ 203 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 204 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 205 #define IF_ENQUEUE(ifq, m) { \ 206 (m)->m_nextpkt = 0; \ 207 if ((ifq)->ifq_tail == 0) \ 208 (ifq)->ifq_head = m; \ 209 else \ 210 (ifq)->ifq_tail->m_nextpkt = m; \ 211 (ifq)->ifq_tail = m; \ 212 (ifq)->ifq_len++; \ 213 } 214 #define IF_PREPEND(ifq, m) { \ 215 (m)->m_nextpkt = (ifq)->ifq_head; \ 216 if ((ifq)->ifq_tail == 0) \ 217 (ifq)->ifq_tail = (m); \ 218 (ifq)->ifq_head = (m); \ 219 (ifq)->ifq_len++; \ 220 } 221 #define IF_DEQUEUE(ifq, m) { \ 222 (m) = (ifq)->ifq_head; \ 223 if (m) { \ 224 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 225 (ifq)->ifq_tail = 0; \ 226 (m)->m_nextpkt = 0; \ 227 (ifq)->ifq_len--; \ 228 } \ 229 } 230 231 #define IFQ_MAXLEN 50 232 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ 233 234 /* 235 * Structure defining statistics and other data kept regarding an address 236 * on a network interface. 237 */ 238 struct ifaddr_data { 239 int64_t ifad_inbytes; 240 int64_t ifad_outbytes; 241 }; 242 243 /* 244 * The ifaddr structure contains information about one address 245 * of an interface. They are maintained by the different address families, 246 * are allocated and attached when an address is set, and are linked 247 * together so all addresses for an interface can be located. 248 */ 249 struct ifaddr { 250 struct sockaddr *ifa_addr; /* address of interface */ 251 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 252 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 253 struct sockaddr *ifa_netmask; /* used to determine subnet */ 254 struct ifnet *ifa_ifp; /* back-pointer to interface */ 255 TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ 256 struct ifaddr_data ifa_data; /* statistics on the address */ 257 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 258 __P((int, struct rtentry *, struct sockaddr *)); 259 u_short ifa_flags; /* mostly rt_flags for cloning */ 260 short ifa_refcnt; /* count of references */ 261 int ifa_metric; /* cost of going out this interface */ 262 }; 263 #define IFA_ROUTE RTF_UP /* route installed */ 264 265 /* 266 * The prefix structure contains information about one prefix 267 * of an interface. They are maintained by the different address families, 268 * are allocated and attached when an prefix or an address is set, 269 * and are linked together so all prfefixes for an interface can be located. 270 */ 271 struct ifprefix { 272 struct sockaddr *ifpr_prefix; /* prefix of interface */ 273 struct ifnet *ifpr_ifp; /* back-pointer to interface */ 274 struct ifprefix *ifpr_next; 275 u_char ifpr_plen; /* prefix length in bits */ 276 }; 277 278 /* 279 * Message format for use in obtaining information about interfaces 280 * from sysctl and the routing socket. 281 */ 282 struct if_msghdr { 283 u_short ifm_msglen; /* to skip over non-understood messages */ 284 u_char ifm_version; /* future binary compatability */ 285 u_char ifm_type; /* message type */ 286 int ifm_addrs; /* like rtm_addrs */ 287 int ifm_flags; /* value of if_flags */ 288 u_short ifm_index; /* index for associated ifp */ 289 struct if_data ifm_data;/* statistics and other data about if */ 290 }; 291 292 /* 293 * Message format for use in obtaining information about interface addresses 294 * from sysctl and the routing socket. 295 */ 296 struct ifa_msghdr { 297 u_short ifam_msglen; /* to skip over non-understood messages */ 298 u_char ifam_version; /* future binary compatability */ 299 u_char ifam_type; /* message type */ 300 int ifam_addrs; /* like rtm_addrs */ 301 int ifam_flags; /* value of ifa_flags */ 302 u_short ifam_index; /* index for associated ifp */ 303 int ifam_metric; /* value of ifa_metric */ 304 }; 305 306 /* 307 * Interface request structure used for socket 308 * ioctl's. All interface ioctl's must have parameter 309 * definitions which begin with ifr_name. The 310 * remainder may be interface specific. 311 */ 312 struct ifreq { 313 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 314 union { 315 struct sockaddr ifru_addr; 316 struct sockaddr ifru_dstaddr; 317 struct sockaddr ifru_broadaddr; 318 short ifru_flags; 319 int ifru_metric; 320 int ifru_mtu; 321 caddr_t ifru_data; 322 } ifr_ifru; 323 #define ifr_addr ifr_ifru.ifru_addr /* address */ 324 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 325 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 326 #define ifr_flags ifr_ifru.ifru_flags /* flags */ 327 #define ifr_metric ifr_ifru.ifru_metric /* metric */ 328 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 329 #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ 330 #define ifr_data ifr_ifru.ifru_data /* for use by interface */ 331 }; 332 333 struct ifaliasreq { 334 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 335 struct sockaddr ifra_addr; 336 struct sockaddr ifra_dstaddr; 337 #define ifra_broadaddr ifra_dstaddr 338 struct sockaddr ifra_mask; 339 }; 340 341 struct ifmediareq { 342 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 343 int ifm_current; /* current media options */ 344 int ifm_mask; /* don't care mask */ 345 int ifm_status; /* media status */ 346 int ifm_active; /* active options */ 347 int ifm_count; /* # entries in ifm_ulist 348 array */ 349 int *ifm_ulist; /* media words */ 350 }; 351 352 353 struct ifdrv { 354 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 355 unsigned long ifd_cmd; 356 size_t ifd_len; 357 void *ifd_data; 358 }; 359 360 /* 361 * Structure used in SIOCGIFCONF request. 362 * Used to retrieve interface configuration 363 * for machine (useful for programs which 364 * must know all networks accessible). 365 */ 366 struct ifconf { 367 int ifc_len; /* size of associated buffer */ 368 union { 369 caddr_t ifcu_buf; 370 struct ifreq *ifcu_req; 371 } ifc_ifcu; 372 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 373 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 374 }; 375 376 /* 377 * Structure for SIOC[AGD]LIFADDR 378 */ 379 struct if_laddrreq { 380 char iflr_name[IFNAMSIZ]; 381 unsigned int flags; 382 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 383 unsigned int prefixlen; /* in/out */ 384 struct sockaddr_storage addr; /* in/out */ 385 struct sockaddr_storage dstaddr; /* out */ 386 }; 387 388 #include <net/if_arp.h> 389 390 #ifdef _KERNEL 391 #define IFAFREE(ifa) \ 392 if ((ifa)->ifa_refcnt <= 0) \ 393 ifafree(ifa); \ 394 else \ 395 (ifa)->ifa_refcnt--; 396 397 struct ifnet_head ifnet; 398 struct ifnet **ifindex2ifnet; 399 #if 0 400 struct ifnet loif[]; 401 #endif 402 int if_index; 403 404 void ether_ifattach __P((struct ifnet *, const u_int8_t *)); 405 char *ether_sprintf __P((const u_char *)); 406 407 void if_attach __P((struct ifnet *)); 408 void if_down __P((struct ifnet *)); 409 void if_qflush __P((struct ifqueue *)); 410 void if_slowtimo __P((void *)); 411 void if_up __P((struct ifnet *)); 412 int ifconf __P((u_long, caddr_t)); 413 void ifinit __P((void)); 414 int ifioctl __P((struct socket *, u_long, caddr_t, struct proc *)); 415 int ifpromisc __P((struct ifnet *, int)); 416 struct ifnet *ifunit __P((char *)); 417 struct ifnet *if_withname __P((struct sockaddr *)); 418 419 struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *)); 420 struct ifaddr *ifa_ifwithaf __P((int)); 421 struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *)); 422 struct ifaddr *ifa_ifwithnet __P((struct sockaddr *)); 423 struct ifaddr *ifa_ifwithladdr __P((struct sockaddr *)); 424 struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *, 425 struct sockaddr *)); 426 struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *)); 427 void ifafree __P((struct ifaddr *)); 428 void link_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 429 430 int loioctl __P((struct ifnet *, u_long, caddr_t)); 431 void loopattach __P((int)); 432 int looutput __P((struct ifnet *, 433 struct mbuf *, struct sockaddr *, struct rtentry *)); 434 void lortrequest __P((int, struct rtentry *, struct sockaddr *)); 435 #else 436 struct if_nameindex { 437 unsigned int if_index; /* 1, 2, ... */ 438 char *if_name; /* null terminated name: "le0", ... */ 439 }; 440 441 __BEGIN_DECLS 442 unsigned int if_nametoindex __P((const char *)); 443 char *if_indextoname __P((unsigned int, char *)); 444 struct if_nameindex *if_nameindex __P((void)); 445 void if_freenameindex __P((struct if_nameindex *)); 446 __END_DECLS 447 #endif /* _KERNEL */ 448 #endif /* !_NET_IF_H_ */ 449
Indexes created Tue Sep 23 07:09:52 GMT 2025