if.h revision 174624
1/*- 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)if.h 8.1 (Berkeley) 6/10/93 30 * $FreeBSD: head/sys/net/if.h 174624 2007-12-15 20:22:09Z kmacy $ 31 */ 32 33#ifndef _NET_IF_H_ 34#define _NET_IF_H_ 35 36#include <sys/cdefs.h> 37 38#ifdef _KERNEL 39#include <sys/queue.h> 40#endif 41 42#if __BSD_VISIBLE 43/* 44 * <net/if.h> does not depend on <sys/time.h> on most other systems. This 45 * helps userland compatibility. (struct timeval ifi_lastchange) 46 */ 47#ifndef _KERNEL 48#include <sys/time.h> 49#endif 50 51struct ifnet; 52#endif 53 54/* 55 * Length of interface external name, including terminating '\0'. 56 * Note: this is the same size as a generic device's external name. 57 */ 58#define IF_NAMESIZE 16 59#if __BSD_VISIBLE 60#define IFNAMSIZ IF_NAMESIZE 61#define IF_MAXUNIT 0x7fff /* historical value */ 62#endif 63#if __BSD_VISIBLE 64 65/* 66 * Structure used to query names of interface cloners. 67 */ 68 69struct if_clonereq { 70 int ifcr_total; /* total cloners (out) */ 71 int ifcr_count; /* room for this many in user buffer */ 72 char *ifcr_buffer; /* buffer for cloner names */ 73}; 74 75/* 76 * Structure describing information about an interface 77 * which may be of interest to management entities. 78 */ 79struct if_data { 80 /* generic interface information */ 81 u_char ifi_type; /* ethernet, tokenring, etc */ 82 u_char ifi_physical; /* e.g., AUI, Thinnet, 10base-T, etc */ 83 u_char ifi_addrlen; /* media address length */ 84 u_char ifi_hdrlen; /* media header length */ 85 u_char ifi_link_state; /* current link state */ 86 u_char ifi_spare_char1; /* spare byte */ 87 u_char ifi_spare_char2; /* spare byte */ 88 u_char ifi_datalen; /* length of this data struct */ 89 u_long ifi_mtu; /* maximum transmission unit */ 90 u_long ifi_metric; /* routing metric (external only) */ 91 u_long ifi_baudrate; /* linespeed */ 92 /* volatile statistics */ 93 u_long ifi_ipackets; /* packets received on interface */ 94 u_long ifi_ierrors; /* input errors on interface */ 95 u_long ifi_opackets; /* packets sent on interface */ 96 u_long ifi_oerrors; /* output errors on interface */ 97 u_long ifi_collisions; /* collisions on csma interfaces */ 98 u_long ifi_ibytes; /* total number of octets received */ 99 u_long ifi_obytes; /* total number of octets sent */ 100 u_long ifi_imcasts; /* packets received via multicast */ 101 u_long ifi_omcasts; /* packets sent via multicast */ 102 u_long ifi_iqdrops; /* dropped on input, this interface */ 103 u_long ifi_noproto; /* destined for unsupported protocol */ 104 u_long ifi_hwassist; /* HW offload capabilities, see IFCAP */ 105 time_t ifi_epoch; /* uptime at attach or stat reset */ 106 struct timeval ifi_lastchange; /* time of last administrative change */ 107}; 108 109/*- 110 * Interface flags are of two types: network stack owned flags, and driver 111 * owned flags. Historically, these values were stored in the same ifnet 112 * flags field, but with the advent of fine-grained locking, they have been 113 * broken out such that the network stack is responsible for synchronizing 114 * the stack-owned fields, and the device driver the device-owned fields. 115 * Both halves can perform lockless reads of the other half's field, subject 116 * to accepting the involved races. 117 * 118 * Both sets of flags come from the same number space, and should not be 119 * permitted to conflict, as they are exposed to user space via a single 120 * field. 121 * 122 * The following symbols identify read and write requirements for fields: 123 * 124 * (i) if_flags field set by device driver before attach, read-only there 125 * after. 126 * (n) if_flags field written only by the network stack, read by either the 127 * stack or driver. 128 * (d) if_drv_flags field written only by the device driver, read by either 129 * the stack or driver. 130 */ 131#define IFF_UP 0x1 /* (n) interface is up */ 132#define IFF_BROADCAST 0x2 /* (i) broadcast address valid */ 133#define IFF_DEBUG 0x4 /* (n) turn on debugging */ 134#define IFF_LOOPBACK 0x8 /* (i) is a loopback net */ 135#define IFF_POINTOPOINT 0x10 /* (i) is a point-to-point link */ 136#define IFF_SMART 0x20 /* (i) interface manages own routes */ 137#define IFF_DRV_RUNNING 0x40 /* (d) resources allocated */ 138#define IFF_NOARP 0x80 /* (n) no address resolution protocol */ 139#define IFF_PROMISC 0x100 /* (n) receive all packets */ 140#define IFF_ALLMULTI 0x200 /* (n) receive all multicast packets */ 141#define IFF_DRV_OACTIVE 0x400 /* (d) tx hardware queue is full */ 142#define IFF_SIMPLEX 0x800 /* (i) can't hear own transmissions */ 143#define IFF_LINK0 0x1000 /* per link layer defined bit */ 144#define IFF_LINK1 0x2000 /* per link layer defined bit */ 145#define IFF_LINK2 0x4000 /* per link layer defined bit */ 146#define IFF_ALTPHYS IFF_LINK2 /* use alternate physical connection */ 147#define IFF_MULTICAST 0x8000 /* (i) supports multicast */ 148/* 0x10000 */ 149#define IFF_PPROMISC 0x20000 /* (n) user-requested promisc mode */ 150#define IFF_MONITOR 0x40000 /* (n) user-requested monitor mode */ 151#define IFF_STATICARP 0x80000 /* (n) static ARP */ 152#define IFF_NEEDSGIANT 0x100000 /* (i) hold Giant over if_start calls */ 153 154/* 155 * Old names for driver flags so that user space tools can continue to use 156 * the old (portable) names. 157 */ 158#ifndef _KERNEL 159#define IFF_RUNNING IFF_DRV_RUNNING 160#define IFF_OACTIVE IFF_DRV_OACTIVE 161#endif 162 163/* flags set internally only: */ 164#define IFF_CANTCHANGE \ 165 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_DRV_RUNNING|IFF_DRV_OACTIVE|\ 166 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_SMART|IFF_PROMISC) 167 168/* 169 * Values for if_link_state. 170 */ 171#define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */ 172#define LINK_STATE_DOWN 1 /* link is down */ 173#define LINK_STATE_UP 2 /* link is up */ 174 175/* 176 * Some convenience macros used for setting ifi_baudrate. 177 * XXX 1000 vs. 1024? --thorpej@netbsd.org 178 */ 179#define IF_Kbps(x) ((x) * 1000) /* kilobits/sec. */ 180#define IF_Mbps(x) (IF_Kbps((x) * 1000)) /* megabits/sec. */ 181#define IF_Gbps(x) (IF_Mbps((x) * 1000)) /* gigabits/sec. */ 182 183/* 184 * Capabilities that interfaces can advertise. 185 * 186 * struct ifnet.if_capabilities 187 * contains the optional features & capabilities a particular interface 188 * supports (not only the driver but also the detected hw revision). 189 * Capabilities are defined by IFCAP_* below. 190 * struct ifnet.if_capenable 191 * contains the enabled (either by default or through ifconfig) optional 192 * features & capabilities on this interface. 193 * Capabilities are defined by IFCAP_* below. 194 * struct if_data.ifi_hwassist in mbuf CSUM_ flag form, controlled by above 195 * contains the enabled optional feature & capabilites that can be used 196 * individually per packet and are specified in the mbuf pkthdr.csum_flags 197 * field. IFCAP_* and CSUM_* do not match one to one and CSUM_* may be 198 * more detailed or differenciated than IFCAP_*. 199 * Hwassist features are defined CSUM_* in sys/mbuf.h 200 */ 201#define IFCAP_RXCSUM 0x0001 /* can offload checksum on RX */ 202#define IFCAP_TXCSUM 0x0002 /* can offload checksum on TX */ 203#define IFCAP_NETCONS 0x0004 /* can be a network console */ 204#define IFCAP_VLAN_MTU 0x0008 /* VLAN-compatible MTU */ 205#define IFCAP_VLAN_HWTAGGING 0x0010 /* hardware VLAN tag support */ 206#define IFCAP_JUMBO_MTU 0x0020 /* 9000 byte MTU supported */ 207#define IFCAP_POLLING 0x0040 /* driver supports polling */ 208#define IFCAP_VLAN_HWCSUM 0x0080 /* can do IFCAP_HWCSUM on VLANs */ 209#define IFCAP_TSO4 0x0100 /* can do TCP Segmentation Offload */ 210#define IFCAP_TSO6 0x0200 /* can do TCP6 Segmentation Offload */ 211#define IFCAP_LRO 0x0400 /* can do Large Receive Offload */ 212#define IFCAP_WOL_UCAST 0x0800 /* wake on any unicast frame */ 213#define IFCAP_WOL_MCAST 0x1000 /* wake on any multicast frame */ 214#define IFCAP_WOL_MAGIC 0x2000 /* wake on any Magic Packet */ 215#define IFCAP_TOE 0x4000 /* interface can offload TCP */ 216 217#define IFCAP_HWCSUM (IFCAP_RXCSUM | IFCAP_TXCSUM) 218#define IFCAP_TSO (IFCAP_TSO4 | IFCAP_TSO6) 219#define IFCAP_WOL (IFCAP_WOL_UCAST | IFCAP_WOL_MCAST | IFCAP_WOL_MAGIC) 220 221#define IFQ_MAXLEN 50 222#define IFNET_SLOWHZ 1 /* granularity is 1 second */ 223 224/* 225 * Message format for use in obtaining information about interfaces 226 * from getkerninfo and the routing socket 227 */ 228struct if_msghdr { 229 u_short ifm_msglen; /* to skip over non-understood messages */ 230 u_char ifm_version; /* future binary compatibility */ 231 u_char ifm_type; /* message type */ 232 int ifm_addrs; /* like rtm_addrs */ 233 int ifm_flags; /* value of if_flags */ 234 u_short ifm_index; /* index for associated ifp */ 235 struct if_data ifm_data;/* statistics and other data about if */ 236}; 237 238/* 239 * Message format for use in obtaining information about interface addresses 240 * from getkerninfo and the routing socket 241 */ 242struct ifa_msghdr { 243 u_short ifam_msglen; /* to skip over non-understood messages */ 244 u_char ifam_version; /* future binary compatibility */ 245 u_char ifam_type; /* message type */ 246 int ifam_addrs; /* like rtm_addrs */ 247 int ifam_flags; /* value of ifa_flags */ 248 u_short ifam_index; /* index for associated ifp */ 249 int ifam_metric; /* value of ifa_metric */ 250}; 251 252/* 253 * Message format for use in obtaining information about multicast addresses 254 * from the routing socket 255 */ 256struct ifma_msghdr { 257 u_short ifmam_msglen; /* to skip over non-understood messages */ 258 u_char ifmam_version; /* future binary compatibility */ 259 u_char ifmam_type; /* message type */ 260 int ifmam_addrs; /* like rtm_addrs */ 261 int ifmam_flags; /* value of ifa_flags */ 262 u_short ifmam_index; /* index for associated ifp */ 263}; 264 265/* 266 * Message format announcing the arrival or departure of a network interface. 267 */ 268struct if_announcemsghdr { 269 u_short ifan_msglen; /* to skip over non-understood messages */ 270 u_char ifan_version; /* future binary compatibility */ 271 u_char ifan_type; /* message type */ 272 u_short ifan_index; /* index for associated ifp */ 273 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 274 u_short ifan_what; /* what type of announcement */ 275}; 276 277#define IFAN_ARRIVAL 0 /* interface arrival */ 278#define IFAN_DEPARTURE 1 /* interface departure */ 279 280/* 281 * Interface request structure used for socket 282 * ioctl's. All interface ioctl's must have parameter 283 * definitions which begin with ifr_name. The 284 * remainder may be interface specific. 285 */ 286struct ifreq { 287 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 288 union { 289 struct sockaddr ifru_addr; 290 struct sockaddr ifru_dstaddr; 291 struct sockaddr ifru_broadaddr; 292 short ifru_flags[2]; 293 short ifru_index; 294 int ifru_metric; 295 int ifru_mtu; 296 int ifru_phys; 297 int ifru_media; 298 caddr_t ifru_data; 299 int ifru_cap[2]; 300 } ifr_ifru; 301#define ifr_addr ifr_ifru.ifru_addr /* address */ 302#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ 303#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ 304#define ifr_flags ifr_ifru.ifru_flags[0] /* flags (low 16 bits) */ 305#define ifr_flagshigh ifr_ifru.ifru_flags[1] /* flags (high 16 bits) */ 306#define ifr_metric ifr_ifru.ifru_metric /* metric */ 307#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ 308#define ifr_phys ifr_ifru.ifru_phys /* physical wire */ 309#define ifr_media ifr_ifru.ifru_media /* physical media */ 310#define ifr_data ifr_ifru.ifru_data /* for use by interface */ 311#define ifr_reqcap ifr_ifru.ifru_cap[0] /* requested capabilities */ 312#define ifr_curcap ifr_ifru.ifru_cap[1] /* current capabilities */ 313#define ifr_index ifr_ifru.ifru_index /* interface index */ 314}; 315 316#define _SIZEOF_ADDR_IFREQ(ifr) \ 317 ((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \ 318 (sizeof(struct ifreq) - sizeof(struct sockaddr) + \ 319 (ifr).ifr_addr.sa_len) : sizeof(struct ifreq)) 320 321struct ifaliasreq { 322 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 323 struct sockaddr ifra_addr; 324 struct sockaddr ifra_broadaddr; 325 struct sockaddr ifra_mask; 326}; 327 328struct ifmediareq { 329 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 330 int ifm_current; /* current media options */ 331 int ifm_mask; /* don't care mask */ 332 int ifm_status; /* media status */ 333 int ifm_active; /* active options */ 334 int ifm_count; /* # entries in ifm_ulist array */ 335 int *ifm_ulist; /* media words */ 336}; 337 338struct ifdrv { 339 char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 340 unsigned long ifd_cmd; 341 size_t ifd_len; 342 void *ifd_data; 343}; 344 345/* 346 * Structure used to retrieve aux status data from interfaces. 347 * Kernel suppliers to this interface should respect the formatting 348 * needed by ifconfig(8): each line starts with a TAB and ends with 349 * a newline. The canonical example to copy and paste is in if_tun.c. 350 */ 351 352#define IFSTATMAX 800 /* 10 lines of text */ 353struct ifstat { 354 char ifs_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 355 char ascii[IFSTATMAX + 1]; 356}; 357 358/* 359 * Structure used in SIOCGIFCONF request. 360 * Used to retrieve interface configuration 361 * for machine (useful for programs which 362 * must know all networks accessible). 363 */ 364struct ifconf { 365 int ifc_len; /* size of associated buffer */ 366 union { 367 caddr_t ifcu_buf; 368 struct ifreq *ifcu_req; 369 } ifc_ifcu; 370#define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ 371#define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ 372}; 373 374#if defined (__amd64__) || defined (COMPAT_32BIT) 375struct ifconf32 { 376 int ifc_len; /* size of associated buffer */ 377 union { 378 u_int ifcu_buf; 379 u_int ifcu_req; 380 } ifc_ifcu; 381}; 382#endif 383 384/* 385 * interface groups 386 */ 387 388#define IFG_ALL "all" /* group contains all interfaces */ 389/* XXX: will we implement this? */ 390#define IFG_EGRESS "egress" /* if(s) default route(s) point to */ 391 392struct ifg_req { 393 union { 394 char ifgrqu_group[IFNAMSIZ]; 395 char ifgrqu_member[IFNAMSIZ]; 396 } ifgrq_ifgrqu; 397#define ifgrq_group ifgrq_ifgrqu.ifgrqu_group 398#define ifgrq_member ifgrq_ifgrqu.ifgrqu_member 399}; 400 401/* 402 * Used to lookup groups for an interface 403 */ 404struct ifgroupreq { 405 char ifgr_name[IFNAMSIZ]; 406 u_int ifgr_len; 407 union { 408 char ifgru_group[IFNAMSIZ]; 409 struct ifg_req *ifgru_groups; 410 } ifgr_ifgru; 411#define ifgr_group ifgr_ifgru.ifgru_group 412#define ifgr_groups ifgr_ifgru.ifgru_groups 413}; 414 415/* 416 * Structure for SIOC[AGD]LIFADDR 417 */ 418struct if_laddrreq { 419 char iflr_name[IFNAMSIZ]; 420 u_int flags; 421#define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ 422 u_int prefixlen; /* in/out */ 423 struct sockaddr_storage addr; /* in/out */ 424 struct sockaddr_storage dstaddr; /* out */ 425}; 426 427#endif /* __BSD_VISIBLE */ 428 429#ifdef _KERNEL 430#ifdef MALLOC_DECLARE 431MALLOC_DECLARE(M_IFADDR); 432MALLOC_DECLARE(M_IFMADDR); 433#endif 434#endif 435 436#ifndef _KERNEL 437struct if_nameindex { 438 unsigned int if_index; /* 1, 2, ... */ 439 char *if_name; /* null terminated name: "le0", ... */ 440}; 441 442__BEGIN_DECLS 443void if_freenameindex(struct if_nameindex *); 444char *if_indextoname(unsigned int, char *); 445struct if_nameindex *if_nameindex(void); 446unsigned int if_nametoindex(const char *); 447__END_DECLS 448#endif 449 450#ifdef _KERNEL 451struct thread; 452 453/* XXX - this should go away soon. */ 454#include <net/if_var.h> 455#endif 456 457#endif /* !_NET_IF_H_ */ 458