199 lines
8.2 KiB
C
199 lines
8.2 KiB
C
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From: @(#)if.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NET_IF_PRIVATE_H_
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#define _NET_IF_PRIVATE_H_
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#ifdef _KERNEL
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/*
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* Structure defining a network interface.
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*/
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struct ifnet {
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/* General book keeping of interface lists. */
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CK_STAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained (CK_) */
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LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */
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CK_STAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if (CK_) */
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/* protected by if_addr_lock */
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u_char if_alloctype; /* if_type at time of allocation */
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uint8_t if_numa_domain; /* NUMA domain of device */
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/* Driver and protocol specific information that remains stable. */
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void *if_softc; /* pointer to driver state */
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void *if_llsoftc; /* link layer softc */
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void *if_l2com; /* pointer to protocol bits */
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const char *if_dname; /* driver name */
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int if_dunit; /* unit or IF_DUNIT_NONE */
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u_short if_index; /* numeric abbreviation for this if */
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u_short if_idxgen; /* ... and its generation count */
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char if_xname[IFNAMSIZ]; /* external name (name + unit) */
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char *if_description; /* interface description */
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/* Variable fields that are touched by the stack and drivers. */
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int if_flags; /* up/down, broadcast, etc. */
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int if_drv_flags; /* driver-managed status flags */
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int if_capabilities; /* interface features & capabilities */
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int if_capabilities2; /* part 2 */
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int if_capenable; /* enabled features & capabilities */
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int if_capenable2; /* part 2 */
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void *if_linkmib; /* link-type-specific MIB data */
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size_t if_linkmiblen; /* length of above data */
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u_int if_refcount; /* reference count */
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/* These fields are shared with struct if_data. */
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uint8_t if_type; /* ethernet, tokenring, etc */
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uint8_t if_addrlen; /* media address length */
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uint8_t if_hdrlen; /* media header length */
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uint8_t if_link_state; /* current link state */
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uint32_t if_mtu; /* maximum transmission unit */
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uint32_t if_metric; /* routing metric (external only) */
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uint64_t if_baudrate; /* linespeed */
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uint64_t if_hwassist; /* HW offload capabilities, see IFCAP */
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time_t if_epoch; /* uptime at attach or stat reset */
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struct timeval if_lastchange; /* time of last administrative change */
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struct ifaltq if_snd; /* output queue (includes altq) */
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struct task if_linktask; /* task for link change events */
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struct task if_addmultitask; /* task for SIOCADDMULTI */
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/* Addresses of different protocol families assigned to this if. */
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struct mtx if_addr_lock; /* lock to protect address lists */
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/*
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* if_addrhead is the list of all addresses associated to
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* an interface.
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* Some code in the kernel assumes that first element
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* of the list has type AF_LINK, and contains sockaddr_dl
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* addresses which store the link-level address and the name
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* of the interface.
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* However, access to the AF_LINK address through this
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* field is deprecated. Use if_addr instead.
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*/
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struct ifaddrhead if_addrhead; /* linked list of addresses per if */
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struct ifmultihead if_multiaddrs; /* multicast addresses configured */
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int if_amcount; /* number of all-multicast requests */
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struct ifaddr *if_addr; /* pointer to link-level address */
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void *if_hw_addr; /* hardware link-level address */
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const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
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struct mtx if_afdata_lock;
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void *if_afdata[AF_MAX];
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int if_afdata_initialized;
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/* Additional features hung off the interface. */
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u_int if_fib; /* interface FIB */
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struct vnet *if_vnet; /* pointer to network stack instance */
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struct vnet *if_home_vnet; /* where this ifnet originates from */
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struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
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struct bpf_if *if_bpf; /* packet filter structure */
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int if_pcount; /* number of promiscuous listeners */
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void *if_bridge; /* bridge glue */
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void *if_lagg; /* lagg glue */
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void *if_pf_kif; /* pf glue */
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struct carp_if *if_carp; /* carp interface structure */
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struct label *if_label; /* interface MAC label */
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struct netmap_adapter *if_netmap; /* netmap(4) softc */
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/* Various procedures of the layer2 encapsulation and drivers. */
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if_output_fn_t if_output; /* output routine (enqueue) */
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if_input_fn_t if_input; /* input routine (from h/w driver) */
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struct mbuf *(*if_bridge_input)(struct ifnet *, struct mbuf *);
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int (*if_bridge_output)(struct ifnet *, struct mbuf *, struct sockaddr *,
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struct rtentry *);
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void (*if_bridge_linkstate)(struct ifnet *ifp);
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if_start_fn_t if_start; /* initiate output routine */
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if_ioctl_fn_t if_ioctl; /* ioctl routine */
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if_init_fn_t if_init; /* Init routine */
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int (*if_resolvemulti) /* validate/resolve multicast */
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(struct ifnet *, struct sockaddr **, struct sockaddr *);
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if_qflush_fn_t if_qflush; /* flush any queue */
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if_transmit_fn_t if_transmit; /* initiate output routine */
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void (*if_reassign) /* reassign to vnet routine */
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(struct ifnet *, struct vnet *, char *);
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if_get_counter_t if_get_counter; /* get counter values */
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int (*if_requestencap) /* make link header from request */
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(struct ifnet *, struct if_encap_req *);
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/* Statistics. */
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counter_u64_t if_counters[IFCOUNTERS];
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/* Stuff that's only temporary and doesn't belong here. */
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/*
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* Network adapter TSO limits:
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* ===========================
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*
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* If the "if_hw_tsomax" field is zero the maximum segment
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* length limit does not apply. If the "if_hw_tsomaxsegcount"
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* or the "if_hw_tsomaxsegsize" field is zero the TSO segment
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* count limit does not apply. If all three fields are zero,
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* there is no TSO limit.
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*
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* NOTE: The TSO limits should reflect the values used in the
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* BUSDMA tag a network adapter is using to load a mbuf chain
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* for transmission. The TCP/IP network stack will subtract
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* space for all linklevel and protocol level headers and
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* ensure that the full mbuf chain passed to the network
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* adapter fits within the given limits.
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*/
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u_int if_hw_tsomax; /* TSO maximum size in bytes */
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u_int if_hw_tsomaxsegcount; /* TSO maximum segment count */
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u_int if_hw_tsomaxsegsize; /* TSO maximum segment size in bytes */
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/*
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* Network adapter send tag support:
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*/
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if_snd_tag_alloc_t *if_snd_tag_alloc;
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/* Ratelimit (packet pacing) */
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if_ratelimit_query_t *if_ratelimit_query;
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if_ratelimit_setup_t *if_ratelimit_setup;
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/* Ethernet PCP */
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uint8_t if_pcp;
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/*
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* Debugnet (Netdump) hooks to be called while in db/panic.
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*/
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struct debugnet_methods *if_debugnet_methods;
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struct epoch_context if_epoch_ctx;
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/*
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* Spare fields to be added before branching a stable branch, so
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* that structure can be enhanced without changing the kernel
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* binary interface.
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*/
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int if_ispare[4]; /* general use */
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};
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#endif /* _KERNEL */
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#endif /* _NET_IF_PRIVATE_H_ */
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