9df9e9361c
Replace in-place implementation with system-wide one; since it guarantees non-zero result drop all less-than-one checks from drivers and net80211. MFC after: 2 weeks
1061 lines
27 KiB
C
1061 lines
27 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2003-2009 Sam Leffler, Errno Consulting
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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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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* IEEE 802.11 support (FreeBSD-specific code)
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*/
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/eventhandler.h>
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#include <sys/kernel.h>
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#include <sys/linker.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <sys/socket.h>
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#include <net/bpf.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_dl.h>
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#include <net/if_clone.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/ethernet.h>
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#include <net/route.h>
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#include <net/vnet.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_input.h>
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SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters");
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#ifdef IEEE80211_DEBUG
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static int ieee80211_debug = 0;
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SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
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0, "debugging printfs");
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#endif
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static MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state");
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static const char wlanname[] = "wlan";
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static struct if_clone *wlan_cloner;
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static int
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wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
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{
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struct ieee80211_clone_params cp;
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struct ieee80211vap *vap;
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struct ieee80211com *ic;
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int error;
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error = copyin(params, &cp, sizeof(cp));
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if (error)
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return error;
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ic = ieee80211_find_com(cp.icp_parent);
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if (ic == NULL)
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return ENXIO;
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if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) {
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ic_printf(ic, "%s: invalid opmode %d\n", __func__,
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cp.icp_opmode);
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return EINVAL;
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}
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if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) {
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ic_printf(ic, "%s mode not supported\n",
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ieee80211_opmode_name[cp.icp_opmode]);
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return EOPNOTSUPP;
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}
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if ((cp.icp_flags & IEEE80211_CLONE_TDMA) &&
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#ifdef IEEE80211_SUPPORT_TDMA
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(ic->ic_caps & IEEE80211_C_TDMA) == 0
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#else
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(1)
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#endif
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) {
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ic_printf(ic, "TDMA not supported\n");
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return EOPNOTSUPP;
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}
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vap = ic->ic_vap_create(ic, wlanname, unit,
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cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
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cp.icp_flags & IEEE80211_CLONE_MACADDR ?
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cp.icp_macaddr : ic->ic_macaddr);
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return (vap == NULL ? EIO : 0);
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}
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static void
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wlan_clone_destroy(struct ifnet *ifp)
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{
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struct ieee80211vap *vap = ifp->if_softc;
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struct ieee80211com *ic = vap->iv_ic;
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ic->ic_vap_delete(vap);
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}
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void
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ieee80211_vap_destroy(struct ieee80211vap *vap)
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{
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CURVNET_SET(vap->iv_ifp->if_vnet);
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if_clone_destroyif(wlan_cloner, vap->iv_ifp);
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CURVNET_RESTORE();
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}
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int
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ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
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{
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int msecs = ticks_to_msecs(*(int *)arg1);
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int error;
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error = sysctl_handle_int(oidp, &msecs, 0, req);
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if (error || !req->newptr)
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return error;
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*(int *)arg1 = msecs_to_ticks(msecs);
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return 0;
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}
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static int
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ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
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{
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int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
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int error;
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error = sysctl_handle_int(oidp, &inact, 0, req);
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if (error || !req->newptr)
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return error;
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*(int *)arg1 = inact / IEEE80211_INACT_WAIT;
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return 0;
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}
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static int
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ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
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{
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struct ieee80211com *ic = arg1;
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return SYSCTL_OUT_STR(req, ic->ic_name);
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}
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static int
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ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
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{
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struct ieee80211com *ic = arg1;
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int t = 0, error;
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error = sysctl_handle_int(oidp, &t, 0, req);
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if (error || !req->newptr)
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return error;
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IEEE80211_LOCK(ic);
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ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
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IEEE80211_UNLOCK(ic);
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return 0;
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}
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/*
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* For now, just restart everything.
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*
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* Later on, it'd be nice to have a separate VAP restart to
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* full-device restart.
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*/
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static int
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ieee80211_sysctl_vap_restart(SYSCTL_HANDLER_ARGS)
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{
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struct ieee80211vap *vap = arg1;
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int t = 0, error;
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error = sysctl_handle_int(oidp, &t, 0, req);
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if (error || !req->newptr)
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return error;
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ieee80211_restart_all(vap->iv_ic);
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return 0;
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}
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void
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ieee80211_sysctl_attach(struct ieee80211com *ic)
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{
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}
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void
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ieee80211_sysctl_detach(struct ieee80211com *ic)
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{
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}
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void
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ieee80211_sysctl_vattach(struct ieee80211vap *vap)
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{
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struct ifnet *ifp = vap->iv_ifp;
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struct sysctl_ctx_list *ctx;
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struct sysctl_oid *oid;
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char num[14]; /* sufficient for 32 bits */
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ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list),
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M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
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if (ctx == NULL) {
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if_printf(ifp, "%s: cannot allocate sysctl context!\n",
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__func__);
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return;
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}
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sysctl_ctx_init(ctx);
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snprintf(num, sizeof(num), "%u", ifp->if_dunit);
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oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
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OID_AUTO, num, CTLFLAG_RD, NULL, "");
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0,
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ieee80211_sysctl_parent, "A", "parent device");
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SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
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"driver capabilities");
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#ifdef IEEE80211_DEBUG
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vap->iv_debug = ieee80211_debug;
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SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"debug", CTLFLAG_RW, &vap->iv_debug, 0,
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"control debugging printfs");
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#endif
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SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
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"consecutive beacon misses before scanning");
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/* XXX inherit from tunables */
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0,
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ieee80211_sysctl_inact, "I",
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"station inactivity timeout (sec)");
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0,
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ieee80211_sysctl_inact, "I",
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"station inactivity probe timeout (sec)");
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0,
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ieee80211_sysctl_inact, "I",
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"station authentication timeout (sec)");
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0,
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ieee80211_sysctl_inact, "I",
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"station initial state timeout (sec)");
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if (vap->iv_htcaps & IEEE80211_HTC_HT) {
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SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"ampdu_mintraffic_bk", CTLFLAG_RW,
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&vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
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"BK traffic tx aggr threshold (pps)");
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SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"ampdu_mintraffic_be", CTLFLAG_RW,
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&vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
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"BE traffic tx aggr threshold (pps)");
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SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"ampdu_mintraffic_vo", CTLFLAG_RW,
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&vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
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"VO traffic tx aggr threshold (pps)");
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SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"ampdu_mintraffic_vi", CTLFLAG_RW,
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&vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
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"VI traffic tx aggr threshold (pps)");
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}
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"force_restart", CTLTYPE_INT | CTLFLAG_RW, vap, 0,
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ieee80211_sysctl_vap_restart, "I",
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"force a VAP restart");
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if (vap->iv_caps & IEEE80211_C_DFS) {
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0,
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ieee80211_sysctl_radar, "I", "simulate radar event");
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}
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vap->iv_sysctl = ctx;
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vap->iv_oid = oid;
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}
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void
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ieee80211_sysctl_vdetach(struct ieee80211vap *vap)
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{
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if (vap->iv_sysctl != NULL) {
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sysctl_ctx_free(vap->iv_sysctl);
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IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF);
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vap->iv_sysctl = NULL;
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}
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}
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#define MS(_v, _f) (((_v) & _f##_M) >> _f##_S)
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int
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ieee80211_com_vincref(struct ieee80211vap *vap)
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{
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uint32_t ostate;
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ostate = atomic_fetchadd_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
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if (ostate & IEEE80211_COM_DETACHED) {
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atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
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return (ENETDOWN);
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}
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if (MS(ostate, IEEE80211_COM_REF) == IEEE80211_COM_REF_MAX) {
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atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
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return (EOVERFLOW);
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}
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return (0);
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}
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void
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ieee80211_com_vdecref(struct ieee80211vap *vap)
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{
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uint32_t ostate;
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ostate = atomic_fetchadd_32(&vap->iv_com_state, -IEEE80211_COM_REF_ADD);
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KASSERT(MS(ostate, IEEE80211_COM_REF) != 0,
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("com reference counter underflow"));
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(void) ostate;
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}
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void
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ieee80211_com_vdetach(struct ieee80211vap *vap)
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{
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int sleep_time;
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sleep_time = msecs_to_ticks(250);
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atomic_set_32(&vap->iv_com_state, IEEE80211_COM_DETACHED);
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while (MS(atomic_load_32(&vap->iv_com_state), IEEE80211_COM_REF) != 0)
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pause("comref", sleep_time);
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}
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#undef MS
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int
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ieee80211_node_dectestref(struct ieee80211_node *ni)
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{
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/* XXX need equivalent of atomic_dec_and_test */
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atomic_subtract_int(&ni->ni_refcnt, 1);
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return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
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}
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void
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ieee80211_drain_ifq(struct ifqueue *ifq)
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{
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struct ieee80211_node *ni;
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struct mbuf *m;
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for (;;) {
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IF_DEQUEUE(ifq, m);
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if (m == NULL)
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break;
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ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
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KASSERT(ni != NULL, ("frame w/o node"));
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ieee80211_free_node(ni);
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m->m_pkthdr.rcvif = NULL;
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m_freem(m);
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}
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}
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void
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ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
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{
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struct ieee80211_node *ni;
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struct mbuf *m, **mprev;
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IF_LOCK(ifq);
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mprev = &ifq->ifq_head;
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while ((m = *mprev) != NULL) {
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ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
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if (ni != NULL && ni->ni_vap == vap) {
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*mprev = m->m_nextpkt; /* remove from list */
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ifq->ifq_len--;
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m_freem(m);
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ieee80211_free_node(ni); /* reclaim ref */
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} else
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mprev = &m->m_nextpkt;
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}
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/* recalculate tail ptr */
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m = ifq->ifq_head;
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for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
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;
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ifq->ifq_tail = m;
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IF_UNLOCK(ifq);
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}
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/*
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* As above, for mbufs allocated with m_gethdr/MGETHDR
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* or initialized by M_COPY_PKTHDR.
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*/
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#define MC_ALIGN(m, len) \
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do { \
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(m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \
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} while (/* CONSTCOND */ 0)
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/*
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* Allocate and setup a management frame of the specified
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* size. We return the mbuf and a pointer to the start
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* of the contiguous data area that's been reserved based
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* on the packet length. The data area is forced to 32-bit
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* alignment and the buffer length to a multiple of 4 bytes.
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* This is done mainly so beacon frames (that require this)
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* can use this interface too.
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*/
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struct mbuf *
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ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
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{
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struct mbuf *m;
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u_int len;
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/*
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* NB: we know the mbuf routines will align the data area
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* so we don't need to do anything special.
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*/
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len = roundup2(headroom + pktlen, 4);
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KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
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if (len < MINCLSIZE) {
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m = m_gethdr(M_NOWAIT, MT_DATA);
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/*
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* Align the data in case additional headers are added.
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* This should only happen when a WEP header is added
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* which only happens for shared key authentication mgt
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* frames which all fit in MHLEN.
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*/
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if (m != NULL)
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M_ALIGN(m, len);
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} else {
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m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
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if (m != NULL)
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MC_ALIGN(m, len);
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}
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if (m != NULL) {
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m->m_data += headroom;
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*frm = m->m_data;
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}
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return m;
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}
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#ifndef __NO_STRICT_ALIGNMENT
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/*
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* Re-align the payload in the mbuf. This is mainly used (right now)
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* to handle IP header alignment requirements on certain architectures.
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*/
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struct mbuf *
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ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
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{
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|
int pktlen, space;
|
|
struct mbuf *n;
|
|
|
|
pktlen = m->m_pkthdr.len;
|
|
space = pktlen + align;
|
|
if (space < MINCLSIZE)
|
|
n = m_gethdr(M_NOWAIT, MT_DATA);
|
|
else {
|
|
n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
|
|
space <= MCLBYTES ? MCLBYTES :
|
|
#if MJUMPAGESIZE != MCLBYTES
|
|
space <= MJUMPAGESIZE ? MJUMPAGESIZE :
|
|
#endif
|
|
space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES);
|
|
}
|
|
if (__predict_true(n != NULL)) {
|
|
m_move_pkthdr(n, m);
|
|
n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
|
|
m_copydata(m, 0, pktlen, mtod(n, caddr_t));
|
|
n->m_len = pktlen;
|
|
} else {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
mtod(m, const struct ieee80211_frame *), NULL,
|
|
"%s", "no mbuf to realign");
|
|
vap->iv_stats.is_rx_badalign++;
|
|
}
|
|
m_freem(m);
|
|
return n;
|
|
}
|
|
#endif /* !__NO_STRICT_ALIGNMENT */
|
|
|
|
int
|
|
ieee80211_add_callback(struct mbuf *m,
|
|
void (*func)(struct ieee80211_node *, void *, int), void *arg)
|
|
{
|
|
struct m_tag *mtag;
|
|
struct ieee80211_cb *cb;
|
|
|
|
mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
|
|
sizeof(struct ieee80211_cb), M_NOWAIT);
|
|
if (mtag == NULL)
|
|
return 0;
|
|
|
|
cb = (struct ieee80211_cb *)(mtag+1);
|
|
cb->func = func;
|
|
cb->arg = arg;
|
|
m_tag_prepend(m, mtag);
|
|
m->m_flags |= M_TXCB;
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
ieee80211_add_xmit_params(struct mbuf *m,
|
|
const struct ieee80211_bpf_params *params)
|
|
{
|
|
struct m_tag *mtag;
|
|
struct ieee80211_tx_params *tx;
|
|
|
|
mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS,
|
|
sizeof(struct ieee80211_tx_params), M_NOWAIT);
|
|
if (mtag == NULL)
|
|
return (0);
|
|
|
|
tx = (struct ieee80211_tx_params *)(mtag+1);
|
|
memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params));
|
|
m_tag_prepend(m, mtag);
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
ieee80211_get_xmit_params(struct mbuf *m,
|
|
struct ieee80211_bpf_params *params)
|
|
{
|
|
struct m_tag *mtag;
|
|
struct ieee80211_tx_params *tx;
|
|
|
|
mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS,
|
|
NULL);
|
|
if (mtag == NULL)
|
|
return (-1);
|
|
tx = (struct ieee80211_tx_params *)(mtag + 1);
|
|
memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params));
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
ieee80211_process_callback(struct ieee80211_node *ni,
|
|
struct mbuf *m, int status)
|
|
{
|
|
struct m_tag *mtag;
|
|
|
|
mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
|
|
if (mtag != NULL) {
|
|
struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
|
|
cb->func(ni, cb->arg, status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Add RX parameters to the given mbuf.
|
|
*
|
|
* Returns 1 if OK, 0 on error.
|
|
*/
|
|
int
|
|
ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs)
|
|
{
|
|
struct m_tag *mtag;
|
|
struct ieee80211_rx_params *rx;
|
|
|
|
mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
|
|
sizeof(struct ieee80211_rx_stats), M_NOWAIT);
|
|
if (mtag == NULL)
|
|
return (0);
|
|
|
|
rx = (struct ieee80211_rx_params *)(mtag + 1);
|
|
memcpy(&rx->params, rxs, sizeof(*rxs));
|
|
m_tag_prepend(m, mtag);
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs)
|
|
{
|
|
struct m_tag *mtag;
|
|
struct ieee80211_rx_params *rx;
|
|
|
|
mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
|
|
NULL);
|
|
if (mtag == NULL)
|
|
return (-1);
|
|
rx = (struct ieee80211_rx_params *)(mtag + 1);
|
|
memcpy(rxs, &rx->params, sizeof(*rxs));
|
|
return (0);
|
|
}
|
|
|
|
const struct ieee80211_rx_stats *
|
|
ieee80211_get_rx_params_ptr(struct mbuf *m)
|
|
{
|
|
struct m_tag *mtag;
|
|
struct ieee80211_rx_params *rx;
|
|
|
|
mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
|
|
NULL);
|
|
if (mtag == NULL)
|
|
return (NULL);
|
|
rx = (struct ieee80211_rx_params *)(mtag + 1);
|
|
return (&rx->params);
|
|
}
|
|
|
|
|
|
/*
|
|
* Add TOA parameters to the given mbuf.
|
|
*/
|
|
int
|
|
ieee80211_add_toa_params(struct mbuf *m, const struct ieee80211_toa_params *p)
|
|
{
|
|
struct m_tag *mtag;
|
|
struct ieee80211_toa_params *rp;
|
|
|
|
mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_TOA_PARAMS,
|
|
sizeof(struct ieee80211_toa_params), M_NOWAIT);
|
|
if (mtag == NULL)
|
|
return (0);
|
|
|
|
rp = (struct ieee80211_toa_params *)(mtag + 1);
|
|
memcpy(rp, p, sizeof(*rp));
|
|
m_tag_prepend(m, mtag);
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
ieee80211_get_toa_params(struct mbuf *m, struct ieee80211_toa_params *p)
|
|
{
|
|
struct m_tag *mtag;
|
|
struct ieee80211_toa_params *rp;
|
|
|
|
mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_TOA_PARAMS,
|
|
NULL);
|
|
if (mtag == NULL)
|
|
return (0);
|
|
rp = (struct ieee80211_toa_params *)(mtag + 1);
|
|
if (p != NULL)
|
|
memcpy(p, rp, sizeof(*p));
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Transmit a frame to the parent interface.
|
|
*/
|
|
int
|
|
ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* Assert the IC TX lock is held - this enforces the
|
|
* processing -> queuing order is maintained
|
|
*/
|
|
IEEE80211_TX_LOCK_ASSERT(ic);
|
|
error = ic->ic_transmit(ic, m);
|
|
if (error) {
|
|
struct ieee80211_node *ni;
|
|
|
|
ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
|
|
|
|
/* XXX number of fragments */
|
|
if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1);
|
|
ieee80211_free_node(ni);
|
|
ieee80211_free_mbuf(m);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Transmit a frame to the VAP interface.
|
|
*/
|
|
int
|
|
ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m)
|
|
{
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
/*
|
|
* When transmitting via the VAP, we shouldn't hold
|
|
* any IC TX lock as the VAP TX path will acquire it.
|
|
*/
|
|
IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
|
|
|
|
return (ifp->if_transmit(ifp, m));
|
|
|
|
}
|
|
|
|
#include <sys/libkern.h>
|
|
|
|
void
|
|
get_random_bytes(void *p, size_t n)
|
|
{
|
|
uint8_t *dp = p;
|
|
|
|
while (n > 0) {
|
|
uint32_t v = arc4random();
|
|
size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
|
|
bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
|
|
dp += sizeof(uint32_t), n -= nb;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Helper function for events that pass just a single mac address.
|
|
*/
|
|
static void
|
|
notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
|
|
{
|
|
struct ieee80211_join_event iev;
|
|
|
|
CURVNET_SET(ifp->if_vnet);
|
|
memset(&iev, 0, sizeof(iev));
|
|
IEEE80211_ADDR_COPY(iev.iev_addr, mac);
|
|
rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
CURVNET_SET_QUIET(ifp->if_vnet);
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
|
|
(ni == vap->iv_bss) ? "bss " : "");
|
|
|
|
if (ni == vap->iv_bss) {
|
|
notify_macaddr(ifp, newassoc ?
|
|
RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid);
|
|
if_link_state_change(ifp, LINK_STATE_UP);
|
|
} else {
|
|
notify_macaddr(ifp, newassoc ?
|
|
RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
|
|
}
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_node_leave(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
CURVNET_SET_QUIET(ifp->if_vnet);
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
|
|
(ni == vap->iv_bss) ? "bss " : "");
|
|
|
|
if (ni == vap->iv_bss) {
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
|
|
if_link_state_change(ifp, LINK_STATE_DOWN);
|
|
} else {
|
|
/* fire off wireless event station leaving */
|
|
notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
|
|
}
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_scan_done(struct ieee80211vap *vap)
|
|
{
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
|
|
|
|
/* dispatch wireless event indicating scan completed */
|
|
CURVNET_SET(ifp->if_vnet);
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_replay_failure(struct ieee80211vap *vap,
|
|
const struct ieee80211_frame *wh, const struct ieee80211_key *k,
|
|
u_int64_t rsc, int tid)
|
|
{
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
|
|
"%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>",
|
|
k->wk_cipher->ic_name, tid, (intmax_t) rsc,
|
|
(intmax_t) k->wk_keyrsc[tid],
|
|
k->wk_keyix, k->wk_rxkeyix);
|
|
|
|
if (ifp != NULL) { /* NB: for cipher test modules */
|
|
struct ieee80211_replay_event iev;
|
|
|
|
IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
|
|
IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
|
|
iev.iev_cipher = k->wk_cipher->ic_cipher;
|
|
if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
|
|
iev.iev_keyix = k->wk_rxkeyix;
|
|
else
|
|
iev.iev_keyix = k->wk_keyix;
|
|
iev.iev_keyrsc = k->wk_keyrsc[tid];
|
|
iev.iev_rsc = rsc;
|
|
CURVNET_SET(ifp->if_vnet);
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
|
|
CURVNET_RESTORE();
|
|
}
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_michael_failure(struct ieee80211vap *vap,
|
|
const struct ieee80211_frame *wh, u_int keyix)
|
|
{
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
|
|
"michael MIC verification failed <keyix %u>", keyix);
|
|
vap->iv_stats.is_rx_tkipmic++;
|
|
|
|
if (ifp != NULL) { /* NB: for cipher test modules */
|
|
struct ieee80211_michael_event iev;
|
|
|
|
IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
|
|
IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
|
|
iev.iev_cipher = IEEE80211_CIPHER_TKIP;
|
|
iev.iev_keyix = keyix;
|
|
CURVNET_SET(ifp->if_vnet);
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
|
|
CURVNET_RESTORE();
|
|
}
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_wds_discover(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_csa(struct ieee80211com *ic,
|
|
const struct ieee80211_channel *c, int mode, int count)
|
|
{
|
|
struct ieee80211_csa_event iev;
|
|
struct ieee80211vap *vap;
|
|
struct ifnet *ifp;
|
|
|
|
memset(&iev, 0, sizeof(iev));
|
|
iev.iev_flags = c->ic_flags;
|
|
iev.iev_freq = c->ic_freq;
|
|
iev.iev_ieee = c->ic_ieee;
|
|
iev.iev_mode = mode;
|
|
iev.iev_count = count;
|
|
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
|
|
ifp = vap->iv_ifp;
|
|
CURVNET_SET(ifp->if_vnet);
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
|
|
CURVNET_RESTORE();
|
|
}
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_radar(struct ieee80211com *ic,
|
|
const struct ieee80211_channel *c)
|
|
{
|
|
struct ieee80211_radar_event iev;
|
|
struct ieee80211vap *vap;
|
|
struct ifnet *ifp;
|
|
|
|
memset(&iev, 0, sizeof(iev));
|
|
iev.iev_flags = c->ic_flags;
|
|
iev.iev_freq = c->ic_freq;
|
|
iev.iev_ieee = c->ic_ieee;
|
|
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
|
|
ifp = vap->iv_ifp;
|
|
CURVNET_SET(ifp->if_vnet);
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
|
|
CURVNET_RESTORE();
|
|
}
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_cac(struct ieee80211com *ic,
|
|
const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
|
|
{
|
|
struct ieee80211_cac_event iev;
|
|
struct ieee80211vap *vap;
|
|
struct ifnet *ifp;
|
|
|
|
memset(&iev, 0, sizeof(iev));
|
|
iev.iev_flags = c->ic_flags;
|
|
iev.iev_freq = c->ic_freq;
|
|
iev.iev_ieee = c->ic_ieee;
|
|
iev.iev_type = type;
|
|
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
|
|
ifp = vap->iv_ifp;
|
|
CURVNET_SET(ifp->if_vnet);
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
|
|
CURVNET_RESTORE();
|
|
}
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_node_deauth(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
|
|
|
|
notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_node_auth(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
|
|
|
|
notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_country(struct ieee80211vap *vap,
|
|
const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
|
|
{
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
struct ieee80211_country_event iev;
|
|
|
|
memset(&iev, 0, sizeof(iev));
|
|
IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
|
|
iev.iev_cc[0] = cc[0];
|
|
iev.iev_cc[1] = cc[1];
|
|
CURVNET_SET(ifp->if_vnet);
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_radio(struct ieee80211com *ic, int state)
|
|
{
|
|
struct ieee80211_radio_event iev;
|
|
struct ieee80211vap *vap;
|
|
struct ifnet *ifp;
|
|
|
|
memset(&iev, 0, sizeof(iev));
|
|
iev.iev_state = state;
|
|
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
|
|
ifp = vap->iv_ifp;
|
|
CURVNET_SET(ifp->if_vnet);
|
|
rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
|
|
CURVNET_RESTORE();
|
|
}
|
|
}
|
|
|
|
void
|
|
ieee80211_load_module(const char *modname)
|
|
{
|
|
|
|
#ifdef notyet
|
|
(void)kern_kldload(curthread, modname, NULL);
|
|
#else
|
|
printf("%s: load the %s module by hand for now.\n", __func__, modname);
|
|
#endif
|
|
}
|
|
|
|
static eventhandler_tag wlan_bpfevent;
|
|
static eventhandler_tag wlan_ifllevent;
|
|
|
|
static void
|
|
bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach)
|
|
{
|
|
/* NB: identify vap's by if_init */
|
|
if (dlt == DLT_IEEE802_11_RADIO &&
|
|
ifp->if_init == ieee80211_init) {
|
|
struct ieee80211vap *vap = ifp->if_softc;
|
|
/*
|
|
* Track bpf radiotap listener state. We mark the vap
|
|
* to indicate if any listener is present and the com
|
|
* to indicate if any listener exists on any associated
|
|
* vap. This flag is used by drivers to prepare radiotap
|
|
* state only when needed.
|
|
*/
|
|
if (attach) {
|
|
ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
|
|
if (vap->iv_opmode == IEEE80211_M_MONITOR)
|
|
atomic_add_int(&vap->iv_ic->ic_montaps, 1);
|
|
} else if (!bpf_peers_present(vap->iv_rawbpf)) {
|
|
ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
|
|
if (vap->iv_opmode == IEEE80211_M_MONITOR)
|
|
atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Change MAC address on the vap (if was not started).
|
|
*/
|
|
static void
|
|
wlan_iflladdr(void *arg __unused, struct ifnet *ifp)
|
|
{
|
|
/* NB: identify vap's by if_init */
|
|
if (ifp->if_init == ieee80211_init &&
|
|
(ifp->if_flags & IFF_UP) == 0) {
|
|
struct ieee80211vap *vap = ifp->if_softc;
|
|
|
|
IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Module glue.
|
|
*
|
|
* NB: the module name is "wlan" for compatibility with NetBSD.
|
|
*/
|
|
static int
|
|
wlan_modevent(module_t mod, int type, void *unused)
|
|
{
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
if (bootverbose)
|
|
printf("wlan: <802.11 Link Layer>\n");
|
|
wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
|
|
bpf_track, 0, EVENTHANDLER_PRI_ANY);
|
|
wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
|
|
wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
|
|
wlan_cloner = if_clone_simple(wlanname, wlan_clone_create,
|
|
wlan_clone_destroy, 0);
|
|
return 0;
|
|
case MOD_UNLOAD:
|
|
if_clone_detach(wlan_cloner);
|
|
EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
|
|
EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
|
|
return 0;
|
|
}
|
|
return EINVAL;
|
|
}
|
|
|
|
static moduledata_t wlan_mod = {
|
|
wlanname,
|
|
wlan_modevent,
|
|
0
|
|
};
|
|
DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
|
|
MODULE_VERSION(wlan, 1);
|
|
MODULE_DEPEND(wlan, ether, 1, 1, 1);
|
|
#ifdef IEEE80211_ALQ
|
|
MODULE_DEPEND(wlan, alq, 1, 1, 1);
|
|
#endif /* IEEE80211_ALQ */
|
|
|