/* $OpenBSD: if_var.h,v 1.122 2022/11/23 14:50:59 kn Exp $ */ /* $NetBSD: if.h,v 1.23 1996/05/07 02:40:27 thorpej Exp $ */ /* * Copyright (c) 2012-2013 Henning Brauer * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)if.h 8.1 (Berkeley) 6/10/93 */ #ifndef _NET_IF_VAR_H_ #define _NET_IF_VAR_H_ #ifdef _KERNEL #include #include #include #include #include #include #include #include /* * Structures defining a network interface, providing a packet * transport mechanism (ala level 0 of the PUP protocols). * * Each interface accepts output datagrams of a specified maximum * length, and provides higher level routines with input datagrams * received from its medium. * * Output occurs when the routine if_output is called, with four parameters: * (*ifp->if_output)(ifp, m, dst, rt) * Here m is the mbuf chain to be sent and dst is the destination address. * The output routine encapsulates the supplied datagram if necessary, * and then transmits it on its medium. * * On input, each interface unwraps the data received by it, and either * places it on the input queue of an internetwork datagram routine * and posts the associated software interrupt, or passes the datagram to a raw * packet input routine. * * Routines exist for locating interfaces by their addresses * or for locating an interface on a certain network, as well as more general * routing and gateway routines maintaining information used to locate * interfaces. These routines live in the files if.c and route.c */ /* * Locks used to protect struct members in this file: * I immutable after creation * d protection left to the driver * c only used in ioctl or routing socket contexts (kernel lock) * K kernel lock * N net lock * * For SRP related structures that allow lock-free reads, the write lock * is indicated below. */ struct rtentry; struct ifnet; struct task; struct cpumem; /* * Structure describing a `cloning' interface. */ struct if_clone { LIST_ENTRY(if_clone) ifc_list; /* [I] on list of cloners */ const char *ifc_name; /* name of device, e.g. `gif' */ size_t ifc_namelen; /* length of name */ int (*ifc_create)(struct if_clone *, int); int (*ifc_destroy)(struct ifnet *); }; #define IF_CLONE_INITIALIZER(name, create, destroy) \ { \ .ifc_list = { NULL, NULL }, \ .ifc_name = name, \ .ifc_namelen = sizeof(name) - 1, \ .ifc_create = create, \ .ifc_destroy = destroy, \ } /* * Structure defining a queue for a network interface. * * (Would like to call this struct ``if'', but C isn't PL/1.) */ TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ struct ifnet { /* and the entries */ void *if_softc; /* [I] lower-level data for this if */ struct refcnt if_refcnt; TAILQ_ENTRY(ifnet) if_list; /* [K] all struct ifnets are chained */ TAILQ_HEAD(, ifaddr) if_addrlist; /* [N] list of addresses per if */ TAILQ_HEAD(, ifmaddr) if_maddrlist; /* [N] list of multicast records */ TAILQ_HEAD(, ifg_list) if_groups; /* [N] list of groups per if */ struct task_list if_addrhooks; /* [I] address change callbacks */ struct task_list if_linkstatehooks; /* [I] link change callbacks*/ struct task_list if_detachhooks; /* [I] detach callbacks */ /* [I] check or clean routes (+ or -)'d */ void (*if_rtrequest)(struct ifnet *, int, struct rtentry *); char if_xname[IFNAMSIZ]; /* [I] external name (name + unit) */ int if_pcount; /* [N] # of promiscuous listeners */ unsigned int if_bridgeidx; /* [K] used by bridge ports */ caddr_t if_bpf; /* packet filter structure */ caddr_t if_mcast; /* used by multicast code */ caddr_t if_mcast6; /* used by IPv6 multicast code */ caddr_t if_pf_kif; /* pf interface abstraction */ union { struct srpl carp_s; /* carp if list (used by !carp ifs) */ unsigned int carp_idx; /* index of carpdev (used by carp ifs) */ } if_carp_ptr; #define if_carp if_carp_ptr.carp_s #define if_carpdevidx if_carp_ptr.carp_idx unsigned int if_index; /* [I] unique index for this if */ short if_timer; /* time 'til if_watchdog called */ unsigned short if_flags; /* [N] up/down, broadcast, etc. */ int if_xflags; /* [N] extra softnet flags */ struct if_data if_data; /* stats and other data about if */ struct cpumem *if_counters; /* per cpu stats */ uint32_t if_hardmtu; /* [d] maximum MTU device supports */ char if_description[IFDESCRSIZE]; /* [c] interface description */ u_short if_rtlabelid; /* [c] next route label */ uint8_t if_priority; /* [c] route priority offset */ uint8_t if_llprio; /* [N] link layer priority */ struct timeout if_slowtimo; /* [I] watchdog timeout */ struct task if_watchdogtask; /* [I] watchdog task */ struct task if_linkstatetask; /* [I] task to do route updates */ /* procedure handles */ void (*if_input)(struct ifnet *, struct mbuf *); int (*if_bpf_mtap)(caddr_t, const struct mbuf *, u_int); int (*if_output)(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); /* output routine (enqueue) */ /* link level output function */ int (*if_ll_output)(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); int (*if_enqueue)(struct ifnet *, struct mbuf *); void (*if_start)(struct ifnet *); /* initiate output */ int (*if_ioctl)(struct ifnet *, u_long, caddr_t); /* ioctl hook */ void (*if_watchdog)(struct ifnet *); /* timer routine */ int (*if_wol)(struct ifnet *, int); /* WoL routine **/ /* queues */ struct ifqueue if_snd; /* transmit queue */ struct ifqueue **if_ifqs; /* [I] pointer to an array of sndqs */ void (*if_qstart)(struct ifqueue *); unsigned int if_nifqs; /* [I] number of output queues */ unsigned int if_txmit; /* [c] txmitigation amount */ struct ifiqueue if_rcv; /* rx/input queue */ struct ifiqueue **if_iqs; /* [I] pointer to the array of iqs */ unsigned int if_niqs; /* [I] number of input queues */ struct sockaddr_dl *if_sadl; /* [N] pointer to our sockaddr_dl */ struct nd_ifinfo *if_nd; /* [I] IPv6 Neighour Discovery info */ }; #define if_mtu if_data.ifi_mtu #define if_type if_data.ifi_type #define if_addrlen if_data.ifi_addrlen #define if_hdrlen if_data.ifi_hdrlen #define if_metric if_data.ifi_metric #define if_link_state if_data.ifi_link_state #define if_baudrate if_data.ifi_baudrate #define if_ipackets if_data.ifi_ipackets #define if_ierrors if_data.ifi_ierrors #define if_opackets if_data.ifi_opackets #define if_oerrors if_data.ifi_oerrors #define if_collisions if_data.ifi_collisions #define if_ibytes if_data.ifi_ibytes #define if_obytes if_data.ifi_obytes #define if_imcasts if_data.ifi_imcasts #define if_omcasts if_data.ifi_omcasts #define if_iqdrops if_data.ifi_iqdrops #define if_oqdrops if_data.ifi_oqdrops #define if_noproto if_data.ifi_noproto #define if_lastchange if_data.ifi_lastchange /* [c] last op. state change */ #define if_capabilities if_data.ifi_capabilities #define if_rdomain if_data.ifi_rdomain enum if_counters { ifc_ipackets, /* packets received on interface */ ifc_ierrors, /* input errors on interface */ ifc_opackets, /* packets sent on interface */ ifc_oerrors, /* output errors on interface */ ifc_collisions, /* collisions on csma interfaces */ ifc_ibytes, /* total number of octets received */ ifc_obytes, /* total number of octets sent */ ifc_imcasts, /* packets received via multicast */ ifc_omcasts, /* packets sent via multicast */ ifc_iqdrops, /* dropped on input, this interface */ ifc_oqdrops, /* dropped on output, this interface */ ifc_noproto, /* destined for unsupported protocol */ ifc_ncounters }; /* * The ifaddr structure contains information about one address * of an interface. They are maintained by the different address families, * are allocated and attached when an address is set, and are linked * together so all addresses for an interface can be located. */ struct ifaddr { struct sockaddr *ifa_addr; /* address of interface */ struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ struct sockaddr *ifa_netmask; /* used to determine subnet */ struct ifnet *ifa_ifp; /* back-pointer to interface */ TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ u_int ifa_flags; /* interface flags, see below */ struct refcnt ifa_refcnt; /* number of `rt_ifa` references */ int ifa_metric; /* cost of going out this interface */ }; #define IFA_ROUTE 0x01 /* Auto-magically installed route */ /* * Interface multicast address. */ struct ifmaddr { struct sockaddr *ifma_addr; /* Protocol address */ unsigned int ifma_ifidx; /* Index of the interface */ unsigned int ifma_refcnt; /* Count of references */ TAILQ_ENTRY(ifmaddr) ifma_list; /* Per-interface list */ }; /* * interface groups */ struct ifg_group { char ifg_group[IFNAMSIZ]; /* [I] group name */ u_int ifg_refcnt; /* [N] group reference count */ caddr_t ifg_pf_kif; /* [I] pf interface group */ int ifg_carp_demoted; /* [K] carp demotion counter */ TAILQ_HEAD(, ifg_member) ifg_members; /* [N] list of members per group */ TAILQ_ENTRY(ifg_group) ifg_next; /* [N] all groups are chained */ }; struct ifg_member { TAILQ_ENTRY(ifg_member) ifgm_next; /* [N] all members are chained */ struct ifnet *ifgm_ifp; /* [I] member interface */ }; struct ifg_list { struct ifg_group *ifgl_group; /* [I] interface group */ TAILQ_ENTRY(ifg_list) ifgl_next; /* [N] all groups are chained */ }; #define IFNET_SLOWTIMO 1 /* granularity is 1 second */ #define IF_TXMIT_MIN 1 #define IF_TXMIT_DEFAULT 16 /* default interface priorities */ #define IF_WIRED_DEFAULT_PRIORITY 0 #define IF_WIRELESS_DEFAULT_PRIORITY 4 #define IF_WWAN_DEFAULT_PRIORITY 6 #define IF_CARP_DEFAULT_PRIORITY 15 /* * Network stack input queues. */ struct niqueue { struct mbuf_queue ni_q; u_int ni_isr; }; #define NIQUEUE_INITIALIZER(_len, _isr) \ { MBUF_QUEUE_INITIALIZER((_len), IPL_NET), (_isr) } void niq_init(struct niqueue *, u_int, u_int); int niq_enqueue(struct niqueue *, struct mbuf *); int niq_enlist(struct niqueue *, struct mbuf_list *); #define niq_dequeue(_q) mq_dequeue(&(_q)->ni_q) #define niq_dechain(_q) mq_dechain(&(_q)->ni_q) #define niq_delist(_q, _ml) mq_delist(&(_q)->ni_q, (_ml)) #define niq_len(_q) mq_len(&(_q)->ni_q) #define niq_drops(_q) mq_drops(&(_q)->ni_q) #define sysctl_niq(_n, _l, _op, _olp, _np, _nl, _niq) \ sysctl_mq((_n), (_l), (_op), (_olp), (_np), (_nl), &(_niq)->ni_q) extern struct ifnet_head ifnetlist; void if_start(struct ifnet *); int if_enqueue(struct ifnet *, struct mbuf *); int if_enqueue_ifq(struct ifnet *, struct mbuf *); void if_input(struct ifnet *, struct mbuf_list *); void if_vinput(struct ifnet *, struct mbuf *); void if_input_process(struct ifnet *, struct mbuf_list *); int if_input_local(struct ifnet *, struct mbuf *, sa_family_t); int if_output_local(struct ifnet *, struct mbuf *, sa_family_t); void if_rtrequest_dummy(struct ifnet *, int, struct rtentry *); void p2p_rtrequest(struct ifnet *, int, struct rtentry *); void p2p_input(struct ifnet *, struct mbuf *); int p2p_bpf_mtap(caddr_t, const struct mbuf *, u_int); struct ifaddr *ifa_ifwithaddr(struct sockaddr *, u_int); struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *, u_int); struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); struct ifaddr *ifaref(struct ifaddr *); void ifafree(struct ifaddr *); int if_isconnected(const struct ifnet *, unsigned int); void if_clone_attach(struct if_clone *); int if_clone_create(const char *, int); int if_clone_destroy(const char *); struct if_clone * if_clone_lookup(const char *, int *); void ifa_add(struct ifnet *, struct ifaddr *); void ifa_del(struct ifnet *, struct ifaddr *); void ifa_update_broadaddr(struct ifnet *, struct ifaddr *, struct sockaddr *); void if_addrhook_add(struct ifnet *, struct task *); void if_addrhook_del(struct ifnet *, struct task *); void if_addrhooks_run(struct ifnet *); void if_linkstatehook_add(struct ifnet *, struct task *); void if_linkstatehook_del(struct ifnet *, struct task *); void if_detachhook_add(struct ifnet *, struct task *); void if_detachhook_del(struct ifnet *, struct task *); void if_rxr_livelocked(struct if_rxring *); void if_rxr_init(struct if_rxring *, u_int, u_int); u_int if_rxr_get(struct if_rxring *, u_int); #define if_rxr_put(_r, _c) do { (_r)->rxr_alive -= (_c); } while (0) #define if_rxr_needrefill(_r) ((_r)->rxr_alive < (_r)->rxr_lwm) #define if_rxr_inuse(_r) ((_r)->rxr_alive) #define if_rxr_cwm(_r) ((_r)->rxr_cwm) int if_rxr_info_ioctl(struct if_rxrinfo *, u_int, struct if_rxring_info *); int if_rxr_ioctl(struct if_rxrinfo *, const char *, u_int, struct if_rxring *); void if_counters_alloc(struct ifnet *); void if_counters_free(struct ifnet *); int if_txhprio_l2_check(int); int if_txhprio_l3_check(int); int if_rxhprio_l2_check(int); int if_rxhprio_l3_check(int); #endif /* _KERNEL */ #endif /* _NET_IF_VAR_H_ */