sys/net/if.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   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. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #ifndef _NET_IF_H_
  33 #define _NET_IF_H_
  34
  35 #include <sys/cdefs.h>
  36
  37 #if __BSD_VISIBLE
  38 /*
  39  * <net/if.h> does not depend on <sys/time.h> on most other systems.  This
  40  * helps userland compatibility.  (struct timeval ifi_lastchange)
  41  * The same holds for <sys/socket.h>.  (struct sockaddr ifru_addr)
  42  */
  43 #ifndef _KERNEL
  44 #include <sys/time.h>
  45 #include <sys/socket.h>
  46 #endif
  47 #endif
  48
  49 /*
  50  * Length of interface external name, including terminating '\0'.
  51  * Note: this is the same size as a generic device's external name.
  52  */
  53 #define         IF_NAMESIZE     16
  54 #if __BSD_VISIBLE
  55 #define         IFNAMSIZ        IF_NAMESIZE
  56 #define         IF_MAXUNIT      0x7fff  /* historical value */
  57 #endif
  58 #if __BSD_VISIBLE
  59
  60 /*
  61  * Structure used to query names of interface cloners.
  62  */
  63
  64 struct if_clonereq {
  65         int     ifcr_total;             /* total cloners (out) */
  66         int     ifcr_count;             /* room for this many in user buffer */
  67         char    *ifcr_buffer;           /* buffer for cloner names */
  68 };
  69
  70 /*
  71  * Structure describing information about an interface
  72  * which may be of interest to management entities.
  73  */
  74 struct if_data {
  75         /* generic interface information */
  76         uint8_t ifi_type;               /* ethernet, tokenring, etc */
  77         uint8_t ifi_physical;           /* e.g., AUI, Thinnet, 10base-T, etc */
  78         uint8_t ifi_addrlen;            /* media address length */
  79         uint8_t ifi_hdrlen;             /* media header length */
  80         uint8_t ifi_link_state;         /* current link state */
  81         uint8_t ifi_vhid;               /* carp vhid */
  82         uint16_t        ifi_datalen;    /* length of this data struct */
  83         uint32_t        ifi_mtu;        /* maximum transmission unit */
  84         uint32_t        ifi_metric;     /* routing metric (external only) */
  85         uint64_t        ifi_baudrate;   /* linespeed */
  86         /* volatile statistics */
  87         uint64_t        ifi_ipackets;   /* packets received on interface */
  88         uint64_t        ifi_ierrors;    /* input errors on interface */
  89         uint64_t        ifi_opackets;   /* packets sent on interface */
  90         uint64_t        ifi_oerrors;    /* output errors on interface */
  91         uint64_t        ifi_collisions; /* collisions on csma interfaces */
  92         uint64_t        ifi_ibytes;     /* total number of octets received */
  93         uint64_t        ifi_obytes;     /* total number of octets sent */
  94         uint64_t        ifi_imcasts;    /* packets received via multicast */
  95         uint64_t        ifi_omcasts;    /* packets sent via multicast */
  96         uint64_t        ifi_iqdrops;    /* dropped on input */
  97         uint64_t        ifi_oqdrops;    /* dropped on output */
  98         uint64_t        ifi_noproto;    /* destined for unsupported protocol */
  99         uint64_t        ifi_hwassist;   /* HW offload capabilities, see IFCAP */
 100
 101         /* Unions are here to make sizes MI. */
 102         union {                         /* uptime at attach or stat reset */
 103                 time_t          tt;
 104                 uint64_t        ph;
 105         } __ifi_epoch;
 106 #define ifi_epoch       __ifi_epoch.tt
 107         union {                         /* time of last administrative change */
 108                 struct timeval  tv;
 109                 struct {
 110                         uint64_t ph1;
 111                         uint64_t ph2;
 112                 } ph;
 113         } __ifi_lastchange;
 114 #define ifi_lastchange  __ifi_lastchange.tv
 115 };
 116
 117 /*-
 118  * Interface flags are of two types: network stack owned flags, and driver
 119  * owned flags.  Historically, these values were stored in the same ifnet
 120  * flags field, but with the advent of fine-grained locking, they have been
 121  * broken out such that the network stack is responsible for synchronizing
 122  * the stack-owned fields, and the device driver the device-owned fields.
 123  * Both halves can perform lockless reads of the other half's field, subject
 124  * to accepting the involved races.
 125  *
 126  * Both sets of flags come from the same number space, and should not be
 127  * permitted to conflict, as they are exposed to user space via a single
 128  * field.
 129  *
 130  * The following symbols identify read and write requirements for fields:
 131  *
 132  * (i) if_flags field set by device driver before attach, read-only there
 133  *     after.
 134  * (n) if_flags field written only by the network stack, read by either the
 135  *     stack or driver.
 136  * (d) if_drv_flags field written only by the device driver, read by either
 137  *     the stack or driver.
 138  */
 139 #define IFF_UP          0x1             /* (n) interface is up */
 140 #define IFF_BROADCAST   0x2             /* (i) broadcast address valid */
 141 #define IFF_DEBUG       0x4             /* (n) turn on debugging */
 142 #define IFF_LOOPBACK    0x8             /* (i) is a loopback net */
 143 #define IFF_POINTOPOINT 0x10            /* (i) is a point-to-point link */
 144 #define IFF_NEEDSEPOCH  0x20            /* (i) calls if_input w/o net epoch */
 145 #define IFF_DRV_RUNNING 0x40            /* (d) resources allocated */
 146 #define IFF_NOARP       0x80            /* (n) no address resolution protocol */
 147 #define IFF_PROMISC     0x100           /* (n) receive all packets */
 148 #define IFF_ALLMULTI    0x200           /* (n) receive all multicast packets */
 149 #define IFF_DRV_OACTIVE 0x400           /* (d) tx hardware queue is full */
 150 #define IFF_SIMPLEX     0x800           /* (i) can't hear own transmissions */
 151 #define IFF_LINK0       0x1000          /* per link layer defined bit */
 152 #define IFF_LINK1       0x2000          /* per link layer defined bit */
 153 #define IFF_LINK2       0x4000          /* per link layer defined bit */
 154 #define IFF_ALTPHYS     IFF_LINK2       /* use alternate physical connection */
 155 #define IFF_MULTICAST   0x8000          /* (i) supports multicast */
 156 #define IFF_CANTCONFIG  0x10000         /* (i) unconfigurable using ioctl(2) */
 157 #define IFF_PPROMISC    0x20000         /* (n) user-requested promisc mode */
 158 #define IFF_MONITOR     0x40000         /* (n) user-requested monitor mode */
 159 #define IFF_STATICARP   0x80000         /* (n) static ARP */
 160 #define IFF_STICKYARP   0x100000        /* (n) sticky ARP */
 161 #define IFF_DYING       0x200000        /* (n) interface is winding down */
 162 #define IFF_RENAMING    0x400000        /* (n) interface is being renamed */
 163 #define IFF_PALLMULTI   0x800000        /* (n) user-requested allmulti mode */
 164 #define IFF_NETLINK_1   0x1000000       /* (n) used by netlink */
 165
 166 /*
 167  * Old names for driver flags so that user space tools can continue to use
 168  * the old (portable) names.
 169  */
 170 #ifndef _KERNEL
 171 #define IFF_RUNNING     IFF_DRV_RUNNING
 172 #define IFF_OACTIVE     IFF_DRV_OACTIVE
 173 #endif
 174
 175 /* flags set internally only: */
 176 #define IFF_CANTCHANGE \
 177         (IFF_BROADCAST|IFF_POINTOPOINT|IFF_DRV_RUNNING|IFF_DRV_OACTIVE|\
 178             IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC|\
 179             IFF_DYING|IFF_CANTCONFIG|IFF_NEEDSEPOCH)
 180
 181 /*
 182  * Values for if_link_state.
 183  */
 184 #define LINK_STATE_UNKNOWN      0       /* link invalid/unknown */
 185 #define LINK_STATE_DOWN         1       /* link is down */
 186 #define LINK_STATE_UP           2       /* link is up */
 187
 188 /*
 189  * Some convenience macros used for setting ifi_baudrate.
 190  * XXX 1000 vs. 1024? --thorpej@netbsd.org
 191  */
 192 #define IF_Kbps(x)      ((uintmax_t)(x) * 1000) /* kilobits/sec. */
 193 #define IF_Mbps(x)      (IF_Kbps((x) * 1000))   /* megabits/sec. */
 194 #define IF_Gbps(x)      (IF_Mbps((x) * 1000))   /* gigabits/sec. */
 195
 196 /*
 197  * Capabilities that interfaces can advertise.
 198  *
 199  * struct ifnet.if_capabilities
 200  *   contains the optional features & capabilities a particular interface
 201  *   supports (not only the driver but also the detected hw revision).
 202  *   Capabilities are defined by IFCAP_* below.
 203  * struct ifnet.if_capenable
 204  *   contains the enabled (either by default or through ifconfig) optional
 205  *   features & capabilities on this interface.
 206  *   Capabilities are defined by IFCAP_* below.
 207  * struct if_data.ifi_hwassist in mbuf CSUM_ flag form, controlled by above
 208  *   contains the enabled optional feature & capabilites that can be used
 209  *   individually per packet and are specified in the mbuf pkthdr.csum_flags
 210  *   field.  IFCAP_* and CSUM_* do not match one to one and CSUM_* may be
 211  *   more detailed or differentiated than IFCAP_*.
 212  *   Hwassist features are defined CSUM_* in sys/mbuf.h
 213  *
 214  * Capabilities that cannot be arbitrarily changed with ifconfig/ioctl
 215  * are listed in IFCAP_CANTCHANGE, similar to IFF_CANTCHANGE.
 216  * This is not strictly necessary because the common code never
 217  * changes capabilities, and it is left to the individual driver
 218  * to do the right thing. However, having the filter here
 219  * avoids replication of the same code in all individual drivers.
 220  */
 221
 222 /* IFCAP values as bit indexes */
 223
 224 #define IFCAP_B_RXCSUM          0 /* can offload checksum on RX */
 225 #define IFCAP_B_TXCSUM          1 /* can offload checksum on TX */
 226 #define IFCAP_B_NETCONS         2 /* can be a network console */
 227 #define IFCAP_B_VLAN_MTU        3 /* VLAN-compatible MTU */
 228 #define IFCAP_B_VLAN_HWTAGGING  4 /* hardware VLAN tag support */
 229 #define IFCAP_B_JUMBO_MTU       5 /* 9000 byte MTU supported */
 230 #define IFCAP_B_POLLING         6 /* driver supports polling */
 231 #define IFCAP_B_VLAN_HWCSUM     7 /* can do IFCAP_HWCSUM on VLANs */
 232 #define IFCAP_B_TSO4            8 /* can do TCP Segmentation Offload */
 233 #define IFCAP_B_TSO6            9 /* can do TCP6 Segmentation Offload */
 234 #define IFCAP_B_LRO             10 /* can do Large Receive Offload */
 235 #define IFCAP_B_WOL_UCAST       11 /* wake on any unicast frame */
 236 #define IFCAP_B_WOL_MCAST       12 /* wake on any multicast frame */
 237 #define IFCAP_B_WOL_MAGIC       13 /* wake on any Magic Packet */
 238 #define IFCAP_B_TOE4            14 /* interface can offload TCP */
 239 #define IFCAP_B_TOE6            15 /* interface can offload TCP6 */
 240 #define IFCAP_B_VLAN_HWFILTER   16 /* interface hw can filter vlan tag */
 241 #define IFCAP_B_NV              17 /* can do SIOCGIFCAPNV/SIOCSIFCAPNV */
 242 #define IFCAP_B_VLAN_HWTSO      18 /* can do IFCAP_TSO on VLANs */
 243 #define IFCAP_B_LINKSTATE       19 /* the runtime link state is dynamic */
 244 #define IFCAP_B_NETMAP          20 /* netmap mode supported/enabled */
 245 #define IFCAP_B_RXCSUM_IPV6     21 /* can offload checksum on IPv6 RX */
 246 #define IFCAP_B_TXCSUM_IPV6     22 /* can offload checksum on IPv6 TX */
 247 #define IFCAP_B_HWSTATS         23 /* manages counters internally */
 248 #define IFCAP_B_TXRTLMT         24 /* hardware supports TX rate limiting */
 249 #define IFCAP_B_HWRXTSTMP       25 /* hardware rx timestamping */
 250 #define IFCAP_B_MEXTPG          26 /* understands M_EXTPG mbufs */
 251 #define IFCAP_B_TXTLS4          27 /* can do TLS encryption and segmentation for TCP */
 252 #define IFCAP_B_TXTLS6          28 /* can do TLS encryption and segmentation for TCP6 */
 253 #define IFCAP_B_VXLAN_HWCSUM    29 /* can do IFCAN_HWCSUM on VXLANs */
 254 #define IFCAP_B_VXLAN_HWTSO     30 /* can do IFCAP_TSO on VXLANs */
 255 #define IFCAP_B_TXTLS_RTLMT     31 /* can do TLS with rate limiting */
 256 #define IFCAP_B_RXTLS4          32 /* can to TLS receive for TCP */
 257 #define IFCAP_B_RXTLS6          33 /* can to TLS receive for TCP6 */
 258 #define IFCAP_B_IPSEC_OFFLOAD   34 /* inline IPSEC offload */
 259 #define __IFCAP_B_SIZE          35
 260
 261 #define IFCAP_B_MAX     (__IFCAP_B_MAX - 1)
 262 #define IFCAP_B_SIZE    (__IFCAP_B_SIZE)
 263
 264 #define IFCAP_BIT(x)            (1 << (x))
 265
 266 #define IFCAP_RXCSUM            IFCAP_BIT(IFCAP_B_RXCSUM)
 267 #define IFCAP_TXCSUM            IFCAP_BIT(IFCAP_B_TXCSUM)
 268 #define IFCAP_NETCONS           IFCAP_BIT(IFCAP_B_NETCONS)
 269 #define IFCAP_VLAN_MTU          IFCAP_BIT(IFCAP_B_VLAN_MTU)
 270 #define IFCAP_VLAN_HWTAGGING    IFCAP_BIT(IFCAP_B_VLAN_HWTAGGING)
 271 #define IFCAP_JUMBO_MTU         IFCAP_BIT(IFCAP_B_JUMBO_MTU)
 272 #define IFCAP_POLLING           IFCAP_BIT(IFCAP_B_POLLING)
 273 #define IFCAP_VLAN_HWCSUM       IFCAP_BIT(IFCAP_B_VLAN_HWCSUM)
 274 #define IFCAP_TSO4              IFCAP_BIT(IFCAP_B_TSO4)
 275 #define IFCAP_TSO6              IFCAP_BIT(IFCAP_B_TSO6)
 276 #define IFCAP_LRO               IFCAP_BIT(IFCAP_B_LRO)
 277 #define IFCAP_WOL_UCAST         IFCAP_BIT(IFCAP_B_WOL_UCAST)
 278 #define IFCAP_WOL_MCAST         IFCAP_BIT(IFCAP_B_WOL_MCAST)
 279 #define IFCAP_WOL_MAGIC         IFCAP_BIT(IFCAP_B_WOL_MAGIC)
 280 #define IFCAP_TOE4              IFCAP_BIT(IFCAP_B_TOE4)
 281 #define IFCAP_TOE6              IFCAP_BIT(IFCAP_B_TOE6)
 282 #define IFCAP_VLAN_HWFILTER     IFCAP_BIT(IFCAP_B_VLAN_HWFILTER)
 283 #define IFCAP_NV                IFCAP_BIT(IFCAP_B_NV)
 284 #define IFCAP_VLAN_HWTSO        IFCAP_BIT(IFCAP_B_VLAN_HWTSO)
 285 #define IFCAP_LINKSTATE         IFCAP_BIT(IFCAP_B_LINKSTATE)
 286 #define IFCAP_NETMAP            IFCAP_BIT(IFCAP_B_NETMAP)
 287 #define IFCAP_RXCSUM_IPV6       IFCAP_BIT(IFCAP_B_RXCSUM_IPV6)
 288 #define IFCAP_TXCSUM_IPV6       IFCAP_BIT(IFCAP_B_TXCSUM_IPV6)
 289 #define IFCAP_HWSTATS           IFCAP_BIT(IFCAP_B_HWSTATS)
 290 #define IFCAP_TXRTLMT           IFCAP_BIT(IFCAP_B_TXRTLMT)
 291 #define IFCAP_HWRXTSTMP         IFCAP_BIT(IFCAP_B_HWRXTSTMP)
 292 #define IFCAP_MEXTPG            IFCAP_BIT(IFCAP_B_MEXTPG)
 293 #define IFCAP_TXTLS4            IFCAP_BIT(IFCAP_B_TXTLS4)
 294 #define IFCAP_TXTLS6            IFCAP_BIT(IFCAP_B_TXTLS6)
 295 #define IFCAP_VXLAN_HWCSUM      IFCAP_BIT(IFCAP_B_VXLAN_HWCSUM)
 296 #define IFCAP_VXLAN_HWTSO       IFCAP_BIT(IFCAP_B_VXLAN_HWTSO)
 297 #define IFCAP_TXTLS_RTLMT       IFCAP_BIT(IFCAP_B_TXTLS_RTLMT)
 298
 299 /* IFCAP2_* are integers, not bits. */
 300 #define IFCAP2_RXTLS4           (IFCAP_B_RXTLS4 - 32)
 301 #define IFCAP2_RXTLS6           (IFCAP_B_RXTLS6 - 32)
 302 #define IFCAP2_IPSEC_OFFLOAD    (IFCAP_B_IPSEC_OFFLOAD - 32)
 303
 304 #define IFCAP2_BIT(x)           (1UL << (x))
 305
 306 #define IFCAP_HWCSUM_IPV6       (IFCAP_RXCSUM_IPV6 | IFCAP_TXCSUM_IPV6)
 307
 308 #define IFCAP_HWCSUM    (IFCAP_RXCSUM | IFCAP_TXCSUM)
 309 #define IFCAP_TSO       (IFCAP_TSO4 | IFCAP_TSO6)
 310 #define IFCAP_WOL       (IFCAP_WOL_UCAST | IFCAP_WOL_MCAST | IFCAP_WOL_MAGIC)
 311 #define IFCAP_TOE       (IFCAP_TOE4 | IFCAP_TOE6)
 312 #define IFCAP_TXTLS     (IFCAP_TXTLS4 | IFCAP_TXTLS6)
 313
 314 #define IFCAP_CANTCHANGE        (IFCAP_NETMAP | IFCAP_NV)
 315 #define IFCAP_ALLCAPS           0xffffffff
 316
 317 #define IFQ_MAXLEN      50
 318 #define IFNET_SLOWHZ    1               /* granularity is 1 second */
 319
 320 /*
 321  * Message format for use in obtaining information about interfaces
 322  * from getkerninfo and the routing socket
 323  * For the new, extensible interface see struct if_msghdrl below.
 324  */
 325 struct if_msghdr {
 326         u_short ifm_msglen;     /* to skip over non-understood messages */
 327         u_char  ifm_version;    /* future binary compatibility */
 328         u_char  ifm_type;       /* message type */
 329         int     ifm_addrs;      /* like rtm_addrs */
 330         int     ifm_flags;      /* value of if_flags */
 331         u_short ifm_index;      /* index for associated ifp */
 332         u_short _ifm_spare1;
 333         struct  if_data ifm_data;/* statistics and other data about if */
 334 };
 335
 336 /*
 337  * The 'l' version shall be used by new interfaces, like NET_RT_IFLISTL.  It is
 338  * extensible after ifm_data_off or within ifm_data.  Both the if_msghdr and
 339  * if_data now have a member field detailing the struct length in addition to
 340  * the routing message length.  Macros are provided to find the start of
 341  * ifm_data and the start of the socket address structures immediately following
 342  * struct if_msghdrl given a pointer to struct if_msghdrl.
 343  */
 344 #define IF_MSGHDRL_IFM_DATA(_l) \
 345     (struct if_data *)((char *)(_l) + (_l)->ifm_data_off)
 346 #define IF_MSGHDRL_RTA(_l) \
 347     (void *)((uintptr_t)(_l) + (_l)->ifm_len)
 348 struct if_msghdrl {
 349         u_short ifm_msglen;     /* to skip over non-understood messages */
 350         u_char  ifm_version;    /* future binary compatibility */
 351         u_char  ifm_type;       /* message type */
 352         int     ifm_addrs;      /* like rtm_addrs */
 353         int     ifm_flags;      /* value of if_flags */
 354         u_short ifm_index;      /* index for associated ifp */
 355         u_short _ifm_spare1;    /* spare space to grow if_index, see if_var.h */
 356         u_short ifm_len;        /* length of if_msghdrl incl. if_data */
 357         u_short ifm_data_off;   /* offset of if_data from beginning */
 358         int     _ifm_spare2;
 359         struct  if_data ifm_data;/* statistics and other data about if */
 360 };
 361
 362 /*
 363  * Message format for use in obtaining information about interface addresses
 364  * from getkerninfo and the routing socket
 365  * For the new, extensible interface see struct ifa_msghdrl below.
 366  */
 367 struct ifa_msghdr {
 368         u_short ifam_msglen;    /* to skip over non-understood messages */
 369         u_char  ifam_version;   /* future binary compatibility */
 370         u_char  ifam_type;      /* message type */
 371         int     ifam_addrs;     /* like rtm_addrs */
 372         int     ifam_flags;     /* value of ifa_flags */
 373         u_short ifam_index;     /* index for associated ifp */
 374         u_short _ifam_spare1;
 375         int     ifam_metric;    /* value of ifa_ifp->if_metric */
 376 };
 377
 378 /*
 379  * The 'l' version shall be used by new interfaces, like NET_RT_IFLISTL.  It is
 380  * extensible after ifam_metric or within ifam_data.  Both the ifa_msghdrl and
 381  * if_data now have a member field detailing the struct length in addition to
 382  * the routing message length.  Macros are provided to find the start of
 383  * ifm_data and the start of the socket address structures immediately following
 384  * struct ifa_msghdrl given a pointer to struct ifa_msghdrl.
 385  */
 386 #define IFA_MSGHDRL_IFAM_DATA(_l) \
 387     (struct if_data *)((char *)(_l) + (_l)->ifam_data_off)
 388 #define IFA_MSGHDRL_RTA(_l) \
 389     (void *)((uintptr_t)(_l) + (_l)->ifam_len)
 390 struct ifa_msghdrl {
 391         u_short ifam_msglen;    /* to skip over non-understood messages */
 392         u_char  ifam_version;   /* future binary compatibility */
 393         u_char  ifam_type;      /* message type */
 394         int     ifam_addrs;     /* like rtm_addrs */
 395         int     ifam_flags;     /* value of ifa_flags */
 396         u_short ifam_index;     /* index for associated ifp */
 397         u_short _ifam_spare1;   /* spare space to grow if_index, see if_var.h */
 398         u_short ifam_len;       /* length of ifa_msghdrl incl. if_data */
 399         u_short ifam_data_off;  /* offset of if_data from beginning */
 400         int     ifam_metric;    /* value of ifa_ifp->if_metric */
 401         struct  if_data ifam_data;/* statistics and other data about if or
 402                                  * address */
 403 };
 404
 405 /*
 406  * Message format for use in obtaining information about multicast addresses
 407  * from the routing socket
 408  */
 409 struct ifma_msghdr {
 410         u_short ifmam_msglen;   /* to skip over non-understood messages */
 411         u_char  ifmam_version;  /* future binary compatibility */
 412         u_char  ifmam_type;     /* message type */
 413         int     ifmam_addrs;    /* like rtm_addrs */
 414         int     ifmam_flags;    /* value of ifa_flags */
 415         u_short ifmam_index;    /* index for associated ifp */
 416         u_short _ifmam_spare1;
 417 };
 418
 419 /*
 420  * Message format announcing the arrival or departure of a network interface.
 421  */
 422 struct if_announcemsghdr {
 423         u_short ifan_msglen;    /* to skip over non-understood messages */
 424         u_char  ifan_version;   /* future binary compatibility */
 425         u_char  ifan_type;      /* message type */
 426         u_short ifan_index;     /* index for associated ifp */
 427         char    ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */
 428         u_short ifan_what;      /* what type of announcement */
 429 };
 430
 431 #define IFAN_ARRIVAL    0       /* interface arrival */
 432 #define IFAN_DEPARTURE  1       /* interface departure */
 433
 434 /*
 435  * Buffer with length to be used in SIOCGIFDESCR/SIOCSIFDESCR requests
 436  */
 437 struct ifreq_buffer {
 438         size_t  length;
 439         void    *buffer;
 440 };
 441
 442 struct ifreq_nv_req {
 443         u_int   buf_length;     /* Total size of buffer,
 444                                    u_int for ABI struct ifreq */
 445         u_int   length;         /* Length of the filled part */
 446         void    *buffer;        /* Buffer itself, containing packed nv */
 447 };
 448
 449 #define IFR_CAP_NV_MAXBUFSIZE   (2 * 1024 * 1024)
 450
 451 /*
 452  * Interface request structure used for socket
 453  * ioctl's.  All interface ioctl's must have parameter
 454  * definitions which begin with ifr_name.  The
 455  * remainder may be interface specific.
 456  */
 457 struct ifreq {
 458         char    ifr_name[IFNAMSIZ];             /* if name, e.g. "en0" */
 459         union {
 460                 struct  sockaddr ifru_addr;
 461                 struct  sockaddr ifru_dstaddr;
 462                 struct  sockaddr ifru_broadaddr;
 463                 struct  ifreq_buffer ifru_buffer;
 464                 short   ifru_flags[2];
 465                 short   ifru_index;
 466                 int     ifru_jid;
 467                 int     ifru_metric;
 468                 int     ifru_mtu;
 469                 int     ifru_phys;
 470                 int     ifru_media;
 471                 caddr_t ifru_data;
 472                 int     ifru_cap[2];
 473                 u_int   ifru_fib;
 474                 u_char  ifru_vlan_pcp;
 475                 struct  ifreq_nv_req ifru_nv;
 476         } ifr_ifru;
 477 #define ifr_addr        ifr_ifru.ifru_addr      /* address */
 478 #define ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-to-p link */
 479 #define ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address */
 480 #ifndef _KERNEL
 481 #define ifr_buffer      ifr_ifru.ifru_buffer    /* user supplied buffer with its length */
 482 #endif
 483 #define ifr_flags       ifr_ifru.ifru_flags[0]  /* flags (low 16 bits) */
 484 #define ifr_flagshigh   ifr_ifru.ifru_flags[1]  /* flags (high 16 bits) */
 485 #define ifr_jid         ifr_ifru.ifru_jid       /* jail/vnet */
 486 #define ifr_metric      ifr_ifru.ifru_metric    /* metric */
 487 #define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu */
 488 #define ifr_phys        ifr_ifru.ifru_phys      /* physical wire */
 489 #define ifr_media       ifr_ifru.ifru_media     /* physical media */
 490 #ifndef _KERNEL
 491 #define ifr_data        ifr_ifru.ifru_data      /* for use by interface */
 492 #endif
 493 #define ifr_reqcap      ifr_ifru.ifru_cap[0]    /* requested capabilities */
 494 #define ifr_curcap      ifr_ifru.ifru_cap[1]    /* current capabilities */
 495 #define ifr_index       ifr_ifru.ifru_index     /* interface index */
 496 #define ifr_fib         ifr_ifru.ifru_fib       /* interface fib */
 497 #define ifr_vlan_pcp    ifr_ifru.ifru_vlan_pcp  /* VLAN priority */
 498 #define ifr_lan_pcp     ifr_ifru.ifru_vlan_pcp  /* VLAN priority */
 499 #define ifr_cap_nv      ifr_ifru.ifru_nv        /* nv-based cap interface */
 500 };
 501
 502 #define _SIZEOF_ADDR_IFREQ(ifr) \
 503         ((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
 504          (sizeof(struct ifreq) - sizeof(struct sockaddr) + \
 505           (ifr).ifr_addr.sa_len) : sizeof(struct ifreq))
 506
 507 struct ifaliasreq {
 508         char    ifra_name[IFNAMSIZ];            /* if name, e.g. "en0" */
 509         struct  sockaddr ifra_addr;
 510         struct  sockaddr ifra_broadaddr;
 511         struct  sockaddr ifra_mask;
 512         int     ifra_vhid;
 513 };
 514
 515 /* 9.x compat */
 516 struct oifaliasreq {
 517         char    ifra_name[IFNAMSIZ];
 518         struct  sockaddr ifra_addr;
 519         struct  sockaddr ifra_broadaddr;
 520         struct  sockaddr ifra_mask;
 521 };
 522
 523 struct ifmediareq {
 524         char    ifm_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 525         int     ifm_current;            /* current media options */
 526         int     ifm_mask;               /* don't care mask */
 527         int     ifm_status;             /* media status */
 528         int     ifm_active;             /* active options */
 529         int     ifm_count;              /* # entries in ifm_ulist array */
 530         int     *ifm_ulist;             /* media words */
 531 };
 532
 533 struct ifdrv {
 534         char            ifd_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 535         unsigned long   ifd_cmd;
 536         size_t          ifd_len;
 537         void            *ifd_data;
 538 };
 539
 540 /*
 541  * Structure used to retrieve aux status data from interfaces.
 542  * Kernel suppliers to this interface should respect the formatting
 543  * needed by ifconfig(8): each line starts with a TAB and ends with
 544  * a newline.  The canonical example to copy and paste is in if_tun.c.
 545  */
 546
 547 #define IFSTATMAX       800             /* 10 lines of text */
 548 struct ifstat {
 549         char    ifs_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 550         char    ascii[IFSTATMAX + 1];
 551 };
 552
 553 /*
 554  * Structure used in SIOCGIFCONF request.
 555  * Used to retrieve interface configuration
 556  * for machine (useful for programs which
 557  * must know all networks accessible).
 558  */
 559 struct ifconf {
 560         int     ifc_len;                /* size of associated buffer */
 561         union {
 562                 caddr_t ifcu_buf;
 563                 struct  ifreq *ifcu_req;
 564         } ifc_ifcu;
 565 #define ifc_buf ifc_ifcu.ifcu_buf       /* buffer address */
 566 #define ifc_req ifc_ifcu.ifcu_req       /* array of structures returned */
 567 };
 568
 569 /*
 570  * interface groups
 571  */
 572
 573 #define IFG_ALL         "all"           /* group contains all interfaces */
 574 /* XXX: will we implement this? */
 575 #define IFG_EGRESS      "egress"        /* if(s) default route(s) point to */
 576
 577 struct ifg_req {
 578         union {
 579                 char                     ifgrqu_group[IFNAMSIZ];
 580                 char                     ifgrqu_member[IFNAMSIZ];
 581         } ifgrq_ifgrqu;
 582 #define ifgrq_group     ifgrq_ifgrqu.ifgrqu_group
 583 #define ifgrq_member    ifgrq_ifgrqu.ifgrqu_member
 584 };
 585
 586 /*
 587  * Used to lookup groups for an interface
 588  */
 589 struct ifgroupreq {
 590         char    ifgr_name[IFNAMSIZ];
 591         u_int   ifgr_len;
 592         union {
 593                 char    ifgru_group[IFNAMSIZ];
 594                 struct  ifg_req *ifgru_groups;
 595         } ifgr_ifgru;
 596 #define ifgr_group      ifgr_ifgru.ifgru_group
 597 #define ifgr_groups     ifgr_ifgru.ifgru_groups
 598 };
 599
 600 /*
 601  * Structure used to request i2c data
 602  * from interface transceivers.
 603  */
 604 struct ifi2creq {
 605         uint8_t dev_addr;       /* i2c address (0xA0, 0xA2) */
 606         uint8_t offset;         /* read offset */
 607         uint8_t len;            /* read length */
 608         uint8_t spare0;
 609         uint32_t spare1;
 610         uint8_t data[8];        /* read buffer */
 611 };
 612
 613 /*
 614  * RSS hash.
 615  */
 616
 617 #define RSS_FUNC_NONE           0               /* RSS disabled */
 618 #define RSS_FUNC_PRIVATE        1               /* non-standard */
 619 #define RSS_FUNC_TOEPLITZ       2
 620
 621 #define RSS_TYPE_IPV4           0x00000001
 622 #define RSS_TYPE_TCP_IPV4       0x00000002
 623 #define RSS_TYPE_IPV6           0x00000004
 624 #define RSS_TYPE_IPV6_EX        0x00000008
 625 #define RSS_TYPE_TCP_IPV6       0x00000010
 626 #define RSS_TYPE_TCP_IPV6_EX    0x00000020
 627 #define RSS_TYPE_UDP_IPV4       0x00000040
 628 #define RSS_TYPE_UDP_IPV6       0x00000080
 629 #define RSS_TYPE_UDP_IPV6_EX    0x00000100
 630
 631 #define RSS_KEYLEN              128
 632
 633 struct ifrsskey {
 634         char            ifrk_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 635         uint8_t         ifrk_func;              /* RSS_FUNC_ */
 636         uint8_t         ifrk_spare0;
 637         uint16_t        ifrk_keylen;
 638         uint8_t         ifrk_key[RSS_KEYLEN];
 639 };
 640
 641 struct ifrsshash {
 642         char            ifrh_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 643         uint8_t         ifrh_func;              /* RSS_FUNC_ */
 644         uint8_t         ifrh_spare0;
 645         uint16_t        ifrh_spare1;
 646         uint32_t        ifrh_types;             /* RSS_TYPE_ */
 647 };
 648
 649 #define IFNET_PCP_NONE  0xff    /* PCP disabled */
 650
 651 #define IFDR_MSG_SIZE           64
 652 #define IFDR_REASON_MSG         1
 653 #define IFDR_REASON_VENDOR      2
 654 struct ifdownreason {
 655         char            ifdr_name[IFNAMSIZ];
 656         uint32_t        ifdr_reason;
 657         uint32_t        ifdr_vendor;
 658         char            ifdr_msg[IFDR_MSG_SIZE];
 659 };
 660
 661 #endif /* __BSD_VISIBLE */
 662
 663 /*
 664  * Opaque interface structure.
 665  */
 666
 667 typedef struct ifnet *if_t;
 668
 669 #ifdef _KERNEL
 670 #ifdef MALLOC_DECLARE
 671 MALLOC_DECLARE(M_IFADDR);
 672 MALLOC_DECLARE(M_IFMADDR);
 673 #endif
 674
 675 extern struct sx ifnet_detach_sxlock;
 676
 677 struct nvlist;
 678 struct ifcap_nv_bit_name;
 679 int if_capnv_to_capint(const struct nvlist *nv, int *old_cap,
 680     const struct ifcap_nv_bit_name *nn, bool all);
 681 void if_capint_to_capnv(struct nvlist *nv,
 682     const struct ifcap_nv_bit_name *nn, int ifr_cap, int ifr_req);
 683 struct siocsifcapnv_driver_data {
 684         int reqcap;
 685         int reqcap2;
 686         struct nvlist *nvcap;
 687 };
 688 #endif
 689
 690 #ifndef _KERNEL
 691 struct if_nameindex {
 692         unsigned int    if_index;       /* 1, 2, ... */
 693         char            *if_name;       /* null terminated name: "le0", ... */
 694 };
 695
 696 __BEGIN_DECLS
 697 void                     if_freenameindex(struct if_nameindex *);
 698 char                    *if_indextoname(unsigned int, char *);
 699 struct if_nameindex     *if_nameindex(void);
 700 unsigned int             if_nametoindex(const char *);
 701 __END_DECLS
 702 #endif
 703 #endif /* !_NET_IF_H_ */