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connectivity interact with the net80211 stack. Historical background: originally wireless devices created an interface, just like Ethernet devices do. Name of an interface matched the name of the driver that created. Later, wlan(4) layer was introduced, and the wlanX interfaces become the actual interface, leaving original ones as "a parent interface" of wlanX. Kernelwise, the KPI between net80211 layer and a driver became a mix of methods that pass a pointer to struct ifnet as identifier and methods that pass pointer to struct ieee80211com. From user point of view, the parent interface just hangs on in the ifconfig list, and user can't do anything useful with it. Now, the struct ifnet goes away. The struct ieee80211com is the only KPI between a device driver and net80211. Details: - The struct ieee80211com is embedded into drivers softc. - Packets are sent via new ic_transmit method, which is very much like the previous if_transmit. - Bringing parent up/down is done via new ic_parent method, which notifies driver about any changes: number of wlan(4) interfaces, number of them in promisc or allmulti state. - Device specific ioctls (if any) are received on new ic_ioctl method. - Packets/errors accounting are done by the stack. In certain cases, when driver experiences errors and can not attribute them to any specific interface, driver updates ic_oerrors or ic_ierrors counters. Details on interface configuration with new world order: - A sequence of commands needed to bring up wireless DOESN"T change. - /etc/rc.conf parameters DON'T change. - List of devices that can be used to create wlan(4) interfaces is now provided by net.wlan.devices sysctl. Most drivers in this change were converted by me, except of wpi(4), that was done by Andriy Voskoboinyk. Big thanks to Kevin Lo for testing changes to at least 8 drivers. Thanks to pluknet@, Oliver Hartmann, Olivier Cochard, gjb@, mmoll@, op@ and lev@, who also participated in testing. Reviewed by: adrian Sponsored by: Netflix Sponsored by: Nginx, Inc.
161 lines
4.9 KiB
C
161 lines
4.9 KiB
C
/*-
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* Copyright (c) 2010-2011 Monthadar Al Jaberi, TerraNet AB
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* 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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $FreeBSD$
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*/
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#ifndef _DEV_WTAP_WTAPVAR_H
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#define _DEV_WTAP_WTAPVAR_H
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/module.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/types.h>
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#include <sys/sockio.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/errno.h>
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#include <sys/callout.h>
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#include <sys/endian.h>
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#include <sys/kthread.h>
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#include <sys/taskqueue.h>
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#include <sys/priv.h>
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#include <sys/sysctl.h>
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#include <machine/bus.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <net/if_arp.h>
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#include <net/ethernet.h>
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#include <net/if_llc.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_regdomain.h>
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#include <net/bpf.h>
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#include <net/vnet.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#if 0
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#define DWTAP_PRINTF(...) printf(__VA_ARGS__)
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#else
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#define DWTAP_PRINTF(...)
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#endif
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#include "if_wtapioctl.h"
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#define MAX_NBR_WTAP (64)
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#define BEACON_INTRERVAL (1000)
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MALLOC_DECLARE(M_WTAP);
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MALLOC_DECLARE(M_WTAP_PACKET);
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MALLOC_DECLARE(M_WTAP_BEACON);
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MALLOC_DECLARE(M_WTAP_RXBUF);
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MALLOC_DECLARE(M_WTAP_PLUGIN);
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/* driver-specific node state */
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struct wtap_node {
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struct ieee80211_node an_node; /* base class */
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/* future addons */
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};
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#define WTAP_NODE(ni) ((struct ath_node *)(ni))
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#define WTAP_NODE_CONST(ni) ((const struct ath_node *)(ni))
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struct wtap_buf {
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STAILQ_ENTRY(wtap_buf) bf_list;
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struct mbuf *m; /* mbuf for buf */
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};
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typedef STAILQ_HEAD(, wtap_buf) wtap_bufhead;
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#define WTAP_BUF_BUSY 0x00000002 /* (tx) desc owned by h/w */
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struct wtap_vap {
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struct ieee80211vap av_vap; /* base class */
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int32_t id; /* wtap id */
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struct cdev *av_dev; /* userspace injecting frames */
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struct wtap_medium *av_md; /* back pointer */
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struct mbuf *beacon; /* beacon */
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struct ieee80211_node *bf_node; /* pointer to the node */
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struct ieee80211_beacon_offsets av_boff;/* dynamic update state */
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struct callout av_swba; /* software beacon alert */
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uint32_t av_bcinterval; /* beacon interval */
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void (*av_recv_mgmt)(struct ieee80211_node *,
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struct mbuf *, int, const struct ieee80211_rx_stats *, int, int);
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int (*av_newstate)(struct ieee80211vap *,
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enum ieee80211_state, int);
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void (*av_bmiss)(struct ieee80211vap *);
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};
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#define WTAP_VAP(vap) ((struct wtap_vap *)(vap))
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struct taskqueue;
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struct wtap_softc {
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struct ieee80211com sc_ic;
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char name[7]; /* wtapXX\0 */
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int32_t id;
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int32_t up;
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struct wtap_medium *sc_md; /* interface medium */
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struct ieee80211_node* (* sc_node_alloc)
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(struct ieee80211vap *, const uint8_t [IEEE80211_ADDR_LEN]);
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void (*sc_node_free)(struct ieee80211_node *);
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struct mtx sc_mtx; /* master lock (recursive) */
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struct taskqueue *sc_tq; /* private task queue */
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wtap_bufhead sc_rxbuf; /* receive buffer */
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struct task sc_rxtask; /* rx int processing */
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struct wtap_tx_radiotap_header sc_tx_th;
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int sc_tx_th_len;
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struct wtap_rx_radiotap_header sc_rx_th;
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int sc_rx_th_len;
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};
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int32_t wtap_attach(struct wtap_softc *, const uint8_t *macaddr);
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int32_t wtap_detach(struct wtap_softc *);
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void wtap_resume(struct wtap_softc *);
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void wtap_suspend(struct wtap_softc *);
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void wtap_shutdown(struct wtap_softc *);
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void wtap_intr(struct wtap_softc *);
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void wtap_inject(struct wtap_softc *, struct mbuf *);
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void wtap_rx_deliver(struct wtap_softc *, struct mbuf *);
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#endif
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