915f1482a9
the state machine clocks to INIT, node references are not reclaimed. Add a new routine ieee80211_drain_ifq that does this and use it instead of IF_DRAIN. Submitted by: Sepherosa Ziehau Obtained from: DragonFly MFC after: 1 month
367 lines
10 KiB
C
367 lines
10 KiB
C
/*-
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* Copyright (c) 2003-2005 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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 <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/linker.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/if.h>
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#include <net/if_media.h>
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#include <net/ethernet.h>
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#include <net/route.h>
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#include <net80211/ieee80211_var.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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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 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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const char *name = ic->ic_ifp->if_xname;
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return SYSCTL_OUT(req, name, strlen(name));
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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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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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MALLOC(ctx, struct sysctl_ctx_list *, sizeof(struct sysctl_ctx_list),
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M_DEVBUF, M_NOWAIT | M_ZERO);
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if (ctx == NULL) {
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if_printf(ic->ic_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", ic->ic_vap);
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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", CTLFLAG_RD, ic, 0, ieee80211_sysctl_parent, "A",
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"parent device");
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#ifdef IEEE80211_DEBUG
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ic->ic_debug = ieee80211_debug;
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SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"debug", CTLFLAG_RW, &ic->ic_debug, 0,
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"control debugging printfs");
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#endif
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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, &ic->ic_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, &ic->ic_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, &ic->ic_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, &ic->ic_inact_init, 0,
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ieee80211_sysctl_inact, "I",
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"station initial state timeout (sec)");
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SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"driver_caps", CTLFLAG_RW, &ic->ic_caps, 0,
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"driver capabilities");
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SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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"bmiss_max", CTLFLAG_RW, &ic->ic_bmiss_max, 0,
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"consecutive beacon misses before scanning");
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ic->ic_sysctl = ctx;
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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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if (ic->ic_sysctl != NULL) {
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sysctl_ctx_free(ic->ic_sysctl);
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ic->ic_sysctl = NULL;
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}
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}
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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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/*
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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(u_int8_t **frm, u_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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/* XXX 4-address frame? */
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len = roundup(sizeof(struct ieee80211_frame) + 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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MH_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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m->m_data += sizeof(struct ieee80211_frame);
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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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#include <sys/libkern.h>
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void
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get_random_bytes(void *p, size_t n)
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{
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u_int8_t *dp = p;
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while (n > 0) {
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u_int32_t v = arc4random();
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size_t nb = n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n;
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bcopy(&v, dp, n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n);
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dp += sizeof(u_int32_t), n -= nb;
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}
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}
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void
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ieee80211_notify_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int newassoc)
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{
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struct ifnet *ifp = ic->ic_ifp;
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struct ieee80211_join_event iev;
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memset(&iev, 0, sizeof(iev));
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if (ni == ic->ic_bss) {
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IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_bssid);
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rt_ieee80211msg(ifp, newassoc ?
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RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC,
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&iev, sizeof(iev));
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if_link_state_change(ifp, LINK_STATE_UP);
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} else {
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IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr);
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rt_ieee80211msg(ifp, newassoc ?
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RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN,
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&iev, sizeof(iev));
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}
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}
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void
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ieee80211_notify_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
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{
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struct ifnet *ifp = ic->ic_ifp;
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struct ieee80211_leave_event iev;
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if (ni == ic->ic_bss) {
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rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
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if_link_state_change(ifp, LINK_STATE_DOWN);
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} else {
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/* fire off wireless event station leaving */
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memset(&iev, 0, sizeof(iev));
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IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr);
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rt_ieee80211msg(ifp, RTM_IEEE80211_LEAVE, &iev, sizeof(iev));
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}
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}
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void
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ieee80211_notify_scan_done(struct ieee80211com *ic)
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{
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struct ifnet *ifp = ic->ic_ifp;
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IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
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/* dispatch wireless event indicating scan completed */
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rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
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}
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void
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ieee80211_notify_replay_failure(struct ieee80211com *ic,
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const struct ieee80211_frame *wh, const struct ieee80211_key *k,
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u_int64_t rsc)
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{
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struct ifnet *ifp = ic->ic_ifp;
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IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
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"[%s] %s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>\n",
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ether_sprintf(wh->i_addr2), k->wk_cipher->ic_name,
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(intmax_t) rsc, (intmax_t) k->wk_keyrsc,
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k->wk_keyix, k->wk_rxkeyix);
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if (ifp != NULL) { /* NB: for cipher test modules */
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struct ieee80211_replay_event iev;
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IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
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IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
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iev.iev_cipher = k->wk_cipher->ic_cipher;
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if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
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iev.iev_keyix = k->wk_rxkeyix;
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else
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iev.iev_keyix = k->wk_keyix;
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iev.iev_keyrsc = k->wk_keyrsc;
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iev.iev_rsc = rsc;
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rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
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}
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}
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void
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ieee80211_notify_michael_failure(struct ieee80211com *ic,
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const struct ieee80211_frame *wh, u_int keyix)
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{
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struct ifnet *ifp = ic->ic_ifp;
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IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
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"[%s] michael MIC verification failed <keyix %u>\n",
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ether_sprintf(wh->i_addr2), keyix);
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ic->ic_stats.is_rx_tkipmic++;
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if (ifp != NULL) { /* NB: for cipher test modules */
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struct ieee80211_michael_event iev;
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IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
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IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
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iev.iev_cipher = IEEE80211_CIPHER_TKIP;
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iev.iev_keyix = keyix;
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rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
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}
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}
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void
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ieee80211_load_module(const char *modname)
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{
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#ifdef notyet
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(void)kern_kldload(curthread, modname, NULL);
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#else
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printf("%s: load the %s module by hand for now.\n", __func__, modname);
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#endif
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}
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/*
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* Module glue.
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*
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* NB: the module name is "wlan" for compatibility with NetBSD.
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*/
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static int
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wlan_modevent(module_t mod, int type, void *unused)
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{
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switch (type) {
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case MOD_LOAD:
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if (bootverbose)
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printf("wlan: <802.11 Link Layer>\n");
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return 0;
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case MOD_UNLOAD:
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return 0;
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}
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return EINVAL;
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}
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static moduledata_t wlan_mod = {
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"wlan",
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wlan_modevent,
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0
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};
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DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
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MODULE_VERSION(wlan, 1);
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MODULE_DEPEND(wlan, ether, 1, 1, 1);
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