ieee80211_freebsd.c revision 298433
121259Swollman/*- 221259Swollman * Copyright (c) 2003-2009 Sam Leffler, Errno Consulting 321259Swollman * All rights reserved. 421259Swollman * 521259Swollman * Redistribution and use in source and binary forms, with or without 621259Swollman * modification, are permitted provided that the following conditions 721259Swollman * are met: 821259Swollman * 1. Redistributions of source code must retain the above copyright 921259Swollman * notice, this list of conditions and the following disclaimer. 1021259Swollman * 2. Redistributions in binary form must reproduce the above copyright 1121259Swollman * notice, this list of conditions and the following disclaimer in the 1221259Swollman * documentation and/or other materials provided with the distribution. 1321259Swollman * 1421259Swollman * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1521259Swollman * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1621259Swollman * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1721259Swollman * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1821259Swollman * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 1921259Swollman * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2021259Swollman * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2121259Swollman * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2221259Swollman * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2321259Swollman * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2421259Swollman */ 2521259Swollman 2621259Swollman#include <sys/cdefs.h> 2721259Swollman__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_freebsd.c 298433 2016-04-21 19:57:40Z pfg $"); 2821259Swollman 2921259Swollman/* 3021259Swollman * IEEE 802.11 support (FreeBSD-specific code) 3121259Swollman */ 3221259Swollman#include "opt_wlan.h" 3321259Swollman 3450477Speter#include <sys/param.h> 3521259Swollman#include <sys/systm.h> 3621259Swollman#include <sys/eventhandler.h> 3721259Swollman#include <sys/kernel.h> 3821259Swollman#include <sys/linker.h> 3921259Swollman#include <sys/malloc.h> 4021259Swollman#include <sys/mbuf.h> 4121259Swollman#include <sys/module.h> 4221259Swollman#include <sys/proc.h> 4321259Swollman#include <sys/sysctl.h> 4421259Swollman 4521259Swollman#include <sys/socket.h> 4621259Swollman 4721259Swollman#include <net/bpf.h> 4821259Swollman#include <net/if.h> 4921259Swollman#include <net/if_var.h> 5021259Swollman#include <net/if_dl.h> 5121259Swollman#include <net/if_clone.h> 5221259Swollman#include <net/if_media.h> 5321259Swollman#include <net/if_types.h> 5421259Swollman#include <net/ethernet.h> 5521259Swollman#include <net/route.h> 5621259Swollman#include <net/vnet.h> 5721259Swollman 5821259Swollman#include <net80211/ieee80211_var.h> 5921259Swollman#include <net80211/ieee80211_input.h> 6021259Swollman 6121259SwollmanSYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 6221259Swollman 6321259Swollman#ifdef IEEE80211_DEBUG 6421259Swollmanint ieee80211_debug = 0; 6521259SwollmanSYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 6621259Swollman 0, "debugging printfs"); 6721259Swollman#endif 6821259Swollman 6921259Swollmanstatic MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state"); 7021259Swollman 7121259Swollmanstatic const char wlanname[] = "wlan"; 7221259Swollmanstatic struct if_clone *wlan_cloner; 7321259Swollman 7421259Swollmanstatic int 7521259Swollmanwlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 7621259Swollman{ 7721259Swollman struct ieee80211_clone_params cp; 7869224Sjlemon struct ieee80211vap *vap; 7969152Sjlemon struct ieee80211com *ic; 8069224Sjlemon int error; 8169224Sjlemon 8269152Sjlemon error = copyin(params, &cp, sizeof(cp)); 8360938Sjake if (error) 8460938Sjake return error; 8560938Sjake ic = ieee80211_find_com(cp.icp_parent); 8672084Sphk if (ic == NULL) 8721259Swollman return ENXIO; 8821259Swollman if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 8921259Swollman ic_printf(ic, "%s: invalid opmode %d\n", __func__, 9021259Swollman cp.icp_opmode); 9121259Swollman return EINVAL; 9221259Swollman } 9321259Swollman if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 9421259Swollman ic_printf(ic, "%s mode not supported\n", 9521259Swollman ieee80211_opmode_name[cp.icp_opmode]); 9621259Swollman return EOPNOTSUPP; 9769152Sjlemon } 9821259Swollman if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 9921259Swollman#ifdef IEEE80211_SUPPORT_TDMA 10021259Swollman (ic->ic_caps & IEEE80211_C_TDMA) == 0 10121259Swollman#else 10221259Swollman (1) 10321259Swollman#endif 10421259Swollman ) { 10521259Swollman ic_printf(ic, "TDMA not supported\n"); 10621259Swollman return EOPNOTSUPP; 10721259Swollman } 10860938Sjake vap = ic->ic_vap_create(ic, wlanname, unit, 10921259Swollman cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 11021259Swollman cp.icp_flags & IEEE80211_CLONE_MACADDR ? 11121259Swollman cp.icp_macaddr : ic->ic_macaddr); 11221259Swollman 11321259Swollman return (vap == NULL ? EIO : 0); 11421259Swollman} 11521259Swollman 11669152Sjlemonstatic void 11721259Swollmanwlan_clone_destroy(struct ifnet *ifp) 11821259Swollman{ 11921259Swollman struct ieee80211vap *vap = ifp->if_softc; 12021259Swollman struct ieee80211com *ic = vap->iv_ic; 12121404Swollman 12221404Swollman ic->ic_vap_delete(vap); 12321259Swollman} 12421259Swollman 12521259Swollmanvoid 12621259Swollmanieee80211_vap_destroy(struct ieee80211vap *vap) 12721259Swollman{ 12821259Swollman CURVNET_SET(vap->iv_ifp->if_vnet); 12921259Swollman if_clone_destroyif(wlan_cloner, vap->iv_ifp); 13021259Swollman CURVNET_RESTORE(); 13121259Swollman} 13236735Sdfr 13321259Swollmanint 13421259Swollmanieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 13521259Swollman{ 13621259Swollman int msecs = ticks_to_msecs(*(int *)arg1); 13721259Swollman int error, t; 13821259Swollman 13921259Swollman error = sysctl_handle_int(oidp, &msecs, 0, req); 14021259Swollman if (error || !req->newptr) 14121259Swollman return error; 14221259Swollman t = msecs_to_ticks(msecs); 14321259Swollman *(int *)arg1 = (t < 1) ? 1 : t; 14421259Swollman return 0; 14521404Swollman} 14621404Swollman 14721259Swollmanstatic int 14821259Swollmanieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 14952904Sshin{ 15021259Swollman int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 15169152Sjlemon int error; 15221259Swollman 15321259Swollman error = sysctl_handle_int(oidp, &inact, 0, req); 15421259Swollman if (error || !req->newptr) 15521259Swollman return error; 15621259Swollman *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 15721259Swollman return 0; 15821259Swollman} 15921259Swollman 16021259Swollmanstatic int 16158698Sjlemonieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 16221259Swollman{ 16321259Swollman struct ieee80211com *ic = arg1; 16421259Swollman 16521259Swollman return SYSCTL_OUT_STR(req, ic->ic_name); 16621259Swollman} 16721259Swollman 16821259Swollmanstatic int 16921259Swollmanieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 17021259Swollman{ 17121259Swollman struct ieee80211com *ic = arg1; 17221259Swollman int t = 0, error; 17321259Swollman 17421259Swollman error = sysctl_handle_int(oidp, &t, 0, req); 17521259Swollman if (error || !req->newptr) 17621259Swollman return error; 17721259Swollman IEEE80211_LOCK(ic); 17853541Sshin ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 17953541Sshin IEEE80211_UNLOCK(ic); 18053541Sshin return 0; 18153541Sshin} 18221259Swollman 18321259Swollmanvoid 18421259Swollmanieee80211_sysctl_attach(struct ieee80211com *ic) 18521259Swollman{ 18621259Swollman} 18721259Swollman 18821259Swollmanvoid 18921259Swollmanieee80211_sysctl_detach(struct ieee80211com *ic) 19021259Swollman{ 19121259Swollman} 19221259Swollman 19321259Swollmanvoid 19472200Sbmilekicieee80211_sysctl_vattach(struct ieee80211vap *vap) 19572200Sbmilekic{ 19669152Sjlemon struct ifnet *ifp = vap->iv_ifp; 19769152Sjlemon struct sysctl_ctx_list *ctx; 19869152Sjlemon struct sysctl_oid *oid; 19921259Swollman char num[14]; /* sufficient for 32 bits */ 20069152Sjlemon 20169152Sjlemon ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list), 20269152Sjlemon M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 20369152Sjlemon if (ctx == NULL) { 20469152Sjlemon if_printf(ifp, "%s: cannot allocate sysctl context!\n", 20569152Sjlemon __func__); 20669152Sjlemon return; 20769152Sjlemon } 20869152Sjlemon sysctl_ctx_init(ctx); 20969152Sjlemon snprintf(num, sizeof(num), "%u", ifp->if_dunit); 21069152Sjlemon oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 21169152Sjlemon OID_AUTO, num, CTLFLAG_RD, NULL, ""); 21269152Sjlemon SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 21369152Sjlemon "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0, 21469152Sjlemon ieee80211_sysctl_parent, "A", "parent device"); 21569152Sjlemon SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 21669152Sjlemon "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 21769152Sjlemon "driver capabilities"); 21869152Sjlemon#ifdef IEEE80211_DEBUG 21969152Sjlemon vap->iv_debug = ieee80211_debug; 22069152Sjlemon SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 22169152Sjlemon "debug", CTLFLAG_RW, &vap->iv_debug, 0, 22269152Sjlemon "control debugging printfs"); 22369152Sjlemon#endif 22469152Sjlemon SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 22569152Sjlemon "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 22669152Sjlemon "consecutive beacon misses before scanning"); 22769152Sjlemon /* XXX inherit from tunables */ 22869152Sjlemon SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 22969152Sjlemon "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 23069152Sjlemon ieee80211_sysctl_inact, "I", 23169152Sjlemon "station inactivity timeout (sec)"); 23269152Sjlemon SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 23369152Sjlemon "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 23469152Sjlemon ieee80211_sysctl_inact, "I", 23569152Sjlemon "station inactivity probe timeout (sec)"); 23669152Sjlemon SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 23769152Sjlemon "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 23869152Sjlemon ieee80211_sysctl_inact, "I", 23969152Sjlemon "station authentication timeout (sec)"); 24069152Sjlemon SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 24169152Sjlemon "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 24269152Sjlemon ieee80211_sysctl_inact, "I", 24369152Sjlemon "station initial state timeout (sec)"); 24469152Sjlemon if (vap->iv_htcaps & IEEE80211_HTC_HT) { 24569152Sjlemon SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 24669152Sjlemon "ampdu_mintraffic_bk", CTLFLAG_RW, 24769152Sjlemon &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 24869152Sjlemon "BK traffic tx aggr threshold (pps)"); 24969152Sjlemon SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 25069152Sjlemon "ampdu_mintraffic_be", CTLFLAG_RW, 25169152Sjlemon &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 25269152Sjlemon "BE traffic tx aggr threshold (pps)"); 25369152Sjlemon SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 25469152Sjlemon "ampdu_mintraffic_vo", CTLFLAG_RW, 25569152Sjlemon &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 25669152Sjlemon "VO traffic tx aggr threshold (pps)"); 25769152Sjlemon SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 25855205Speter "ampdu_mintraffic_vi", CTLFLAG_RW, 25969152Sjlemon &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 26069152Sjlemon "VI traffic tx aggr threshold (pps)"); 26121259Swollman } 26235210Sbde if (vap->iv_caps & IEEE80211_C_DFS) { 26369152Sjlemon SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 26421259Swollman "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 26569152Sjlemon ieee80211_sysctl_radar, "I", "simulate radar event"); 26621259Swollman } 26769152Sjlemon vap->iv_sysctl = ctx; 26869152Sjlemon vap->iv_oid = oid; 26969152Sjlemon} 27069152Sjlemon 27169152Sjlemonvoid 27269152Sjlemonieee80211_sysctl_vdetach(struct ieee80211vap *vap) 27369152Sjlemon{ 27469152Sjlemon 27569152Sjlemon if (vap->iv_sysctl != NULL) { 27669152Sjlemon sysctl_ctx_free(vap->iv_sysctl); 27769152Sjlemon IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF); 27869152Sjlemon vap->iv_sysctl = NULL; 27969152Sjlemon } 28069152Sjlemon} 28169152Sjlemon 28269152Sjlemonint 28369152Sjlemonieee80211_node_dectestref(struct ieee80211_node *ni) 28469152Sjlemon{ 28569152Sjlemon /* XXX need equivalent of atomic_dec_and_test */ 28669152Sjlemon atomic_subtract_int(&ni->ni_refcnt, 1); 28769152Sjlemon return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 28869152Sjlemon} 28969152Sjlemon 29069152Sjlemonvoid 29169152Sjlemonieee80211_drain_ifq(struct ifqueue *ifq) 29221259Swollman{ 29321259Swollman struct ieee80211_node *ni; 29449459Sbrian struct mbuf *m; 29549459Sbrian 29649459Sbrian for (;;) { 29749459Sbrian IF_DEQUEUE(ifq, m); 29849459Sbrian if (m == NULL) 29949459Sbrian break; 30049459Sbrian 30155205Speter ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 30221259Swollman KASSERT(ni != NULL, ("frame w/o node")); 30321259Swollman ieee80211_free_node(ni); 30421259Swollman m->m_pkthdr.rcvif = NULL; 30521259Swollman 30621259Swollman m_freem(m); 30721259Swollman } 30821259Swollman} 30921259Swollman 31021259Swollmanvoid 31121259Swollmanieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) 31221259Swollman{ 31321259Swollman struct ieee80211_node *ni; 31467334Sjoe struct mbuf *m, **mprev; 31521259Swollman 31660938Sjake IF_LOCK(ifq); 31721259Swollman mprev = &ifq->ifq_head; 31821259Swollman while ((m = *mprev) != NULL) { 31921259Swollman ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 32047254Spb if (ni != NULL && ni->ni_vap == vap) { 32121259Swollman *mprev = m->m_nextpkt; /* remove from list */ 32221259Swollman ifq->ifq_len--; 32321259Swollman 32421259Swollman m_freem(m); 32528845Sjulian ieee80211_free_node(ni); /* reclaim ref */ 32628845Sjulian } else 32728845Sjulian mprev = &m->m_nextpkt; 32821259Swollman } 32921259Swollman /* recalculate tail ptr */ 33021259Swollman m = ifq->ifq_head; 33153541Sshin for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 33253541Sshin ; 33353541Sshin ifq->ifq_tail = m; 33421404Swollman IF_UNLOCK(ifq); 33552904Sshin} 33652904Sshin 33752904Sshin/* 33853541Sshin * As above, for mbufs allocated with m_gethdr/MGETHDR 33952904Sshin * or initialized by M_COPY_PKTHDR. 34052904Sshin */ 34152904Sshin#define MC_ALIGN(m, len) \ 34252904Sshindo { \ 34360938Sjake (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \ 34452904Sshin} while (/* CONSTCOND */ 0) 34552904Sshin 34652904Sshin/* 34752904Sshin * Allocate and setup a management frame of the specified 34852904Sshin * size. We return the mbuf and a pointer to the start 34921404Swollman * of the contiguous data area that's been reserved based 35021404Swollman * on the packet length. The data area is forced to 32-bit 35121404Swollman * alignment and the buffer length to a multiple of 4 bytes. 35221404Swollman * This is done mainly so beacon frames (that require this) 35321404Swollman * can use this interface too. 35421404Swollman */ 35572084Sphkstruct mbuf * 35621434Swollmanieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 35721434Swollman{ 35821434Swollman struct mbuf *m; 35921434Swollman u_int len; 36021434Swollman 36121404Swollman /* 36221404Swollman * NB: we know the mbuf routines will align the data area 36355205Speter * so we don't need to do anything special. 36421259Swollman */ 36546568Speter len = roundup2(headroom + pktlen, 4); 36646568Speter KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 36746568Speter if (len < MINCLSIZE) { 36846568Speter m = m_gethdr(M_NOWAIT, MT_DATA); 36946568Speter /* 37046568Speter * Align the data in case additional headers are added. 37121259Swollman * This should only happen when a WEP header is added 37221259Swollman * which only happens for shared key authentication mgt 37352904Sshin * frames which all fit in MHLEN. 37421259Swollman */ 37571791Speter if (m != NULL) 37621259Swollman M_ALIGN(m, len); 37721259Swollman } else { 37821259Swollman m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 37963090Sarchie if (m != NULL) 38063090Sarchie MC_ALIGN(m, len); 38121259Swollman } 38262143Sarchie if (m != NULL) { 38321259Swollman m->m_data += headroom; 38421259Swollman *frm = m->m_data; 38562143Sarchie } 38621259Swollman return m; 38721259Swollman} 38853541Sshin 38921434Swollman#ifndef __NO_STRICT_ALIGNMENT 39021404Swollman/* 39121259Swollman * Re-align the payload in the mbuf. This is mainly used (right now) 39221404Swollman * to handle IP header alignment requirements on certain architectures. 39345720Speter */ 39421259Swollmanstruct mbuf * 39541879Sphkieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 39664651Sarchie{ 39741879Sphk int pktlen, space; 39821259Swollman struct mbuf *n; 39921259Swollman 40036735Sdfr pktlen = m->m_pkthdr.len; 40121259Swollman space = pktlen + align; 40221259Swollman if (space < MINCLSIZE) 40352904Sshin n = m_gethdr(M_NOWAIT, MT_DATA); 40421259Swollman else { 40521259Swollman n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, 40621259Swollman space <= MCLBYTES ? MCLBYTES : 40721259Swollman#if MJUMPAGESIZE != MCLBYTES 40821259Swollman space <= MJUMPAGESIZE ? MJUMPAGESIZE : 40921259Swollman#endif 41021259Swollman space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 41121259Swollman } 41221259Swollman if (__predict_true(n != NULL)) { 41321259Swollman m_move_pkthdr(n, m); 41421259Swollman n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 41521259Swollman m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 41621259Swollman n->m_len = pktlen; 41721259Swollman } else { 41821259Swollman IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 41921259Swollman mtod(m, const struct ieee80211_frame *), NULL, 42053541Sshin "%s", "no mbuf to realign"); 42121434Swollman vap->iv_stats.is_rx_badalign++; 42260889Sarchie } 42321434Swollman m_freem(m); 42455205Speter return n; 42521259Swollman} 42621259Swollman#endif /* !__NO_STRICT_ALIGNMENT */ 427 428int 429ieee80211_add_callback(struct mbuf *m, 430 void (*func)(struct ieee80211_node *, void *, int), void *arg) 431{ 432 struct m_tag *mtag; 433 struct ieee80211_cb *cb; 434 435 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 436 sizeof(struct ieee80211_cb), M_NOWAIT); 437 if (mtag == NULL) 438 return 0; 439 440 cb = (struct ieee80211_cb *)(mtag+1); 441 cb->func = func; 442 cb->arg = arg; 443 m_tag_prepend(m, mtag); 444 m->m_flags |= M_TXCB; 445 return 1; 446} 447 448int 449ieee80211_add_xmit_params(struct mbuf *m, 450 const struct ieee80211_bpf_params *params) 451{ 452 struct m_tag *mtag; 453 struct ieee80211_tx_params *tx; 454 455 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 456 sizeof(struct ieee80211_tx_params), M_NOWAIT); 457 if (mtag == NULL) 458 return (0); 459 460 tx = (struct ieee80211_tx_params *)(mtag+1); 461 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params)); 462 m_tag_prepend(m, mtag); 463 return (1); 464} 465 466int 467ieee80211_get_xmit_params(struct mbuf *m, 468 struct ieee80211_bpf_params *params) 469{ 470 struct m_tag *mtag; 471 struct ieee80211_tx_params *tx; 472 473 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 474 NULL); 475 if (mtag == NULL) 476 return (-1); 477 tx = (struct ieee80211_tx_params *)(mtag + 1); 478 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params)); 479 return (0); 480} 481 482void 483ieee80211_process_callback(struct ieee80211_node *ni, 484 struct mbuf *m, int status) 485{ 486 struct m_tag *mtag; 487 488 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 489 if (mtag != NULL) { 490 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 491 cb->func(ni, cb->arg, status); 492 } 493} 494 495/* 496 * Add RX parameters to the given mbuf. 497 * 498 * Returns 1 if OK, 0 on error. 499 */ 500int 501ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs) 502{ 503 struct m_tag *mtag; 504 struct ieee80211_rx_params *rx; 505 506 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 507 sizeof(struct ieee80211_rx_stats), M_NOWAIT); 508 if (mtag == NULL) 509 return (0); 510 511 rx = (struct ieee80211_rx_params *)(mtag + 1); 512 memcpy(&rx->params, rxs, sizeof(*rxs)); 513 m_tag_prepend(m, mtag); 514 return (1); 515} 516 517int 518ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs) 519{ 520 struct m_tag *mtag; 521 struct ieee80211_rx_params *rx; 522 523 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 524 NULL); 525 if (mtag == NULL) 526 return (-1); 527 rx = (struct ieee80211_rx_params *)(mtag + 1); 528 memcpy(rxs, &rx->params, sizeof(*rxs)); 529 return (0); 530} 531 532/* 533 * Transmit a frame to the parent interface. 534 */ 535int 536ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m) 537{ 538 int error; 539 540 /* 541 * Assert the IC TX lock is held - this enforces the 542 * processing -> queuing order is maintained 543 */ 544 IEEE80211_TX_LOCK_ASSERT(ic); 545 error = ic->ic_transmit(ic, m); 546 if (error) { 547 struct ieee80211_node *ni; 548 549 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 550 551 /* XXX number of fragments */ 552 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1); 553 ieee80211_free_node(ni); 554 ieee80211_free_mbuf(m); 555 } 556 return (error); 557} 558 559/* 560 * Transmit a frame to the VAP interface. 561 */ 562int 563ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) 564{ 565 struct ifnet *ifp = vap->iv_ifp; 566 567 /* 568 * When transmitting via the VAP, we shouldn't hold 569 * any IC TX lock as the VAP TX path will acquire it. 570 */ 571 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 572 573 return (ifp->if_transmit(ifp, m)); 574 575} 576 577#include <sys/libkern.h> 578 579void 580get_random_bytes(void *p, size_t n) 581{ 582 uint8_t *dp = p; 583 584 while (n > 0) { 585 uint32_t v = arc4random(); 586 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 587 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 588 dp += sizeof(uint32_t), n -= nb; 589 } 590} 591 592/* 593 * Helper function for events that pass just a single mac address. 594 */ 595static void 596notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 597{ 598 struct ieee80211_join_event iev; 599 600 CURVNET_SET(ifp->if_vnet); 601 memset(&iev, 0, sizeof(iev)); 602 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 603 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 604 CURVNET_RESTORE(); 605} 606 607void 608ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 609{ 610 struct ieee80211vap *vap = ni->ni_vap; 611 struct ifnet *ifp = vap->iv_ifp; 612 613 CURVNET_SET_QUIET(ifp->if_vnet); 614 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 615 (ni == vap->iv_bss) ? "bss " : ""); 616 617 if (ni == vap->iv_bss) { 618 notify_macaddr(ifp, newassoc ? 619 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 620 if_link_state_change(ifp, LINK_STATE_UP); 621 } else { 622 notify_macaddr(ifp, newassoc ? 623 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 624 } 625 CURVNET_RESTORE(); 626} 627 628void 629ieee80211_notify_node_leave(struct ieee80211_node *ni) 630{ 631 struct ieee80211vap *vap = ni->ni_vap; 632 struct ifnet *ifp = vap->iv_ifp; 633 634 CURVNET_SET_QUIET(ifp->if_vnet); 635 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 636 (ni == vap->iv_bss) ? "bss " : ""); 637 638 if (ni == vap->iv_bss) { 639 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 640 if_link_state_change(ifp, LINK_STATE_DOWN); 641 } else { 642 /* fire off wireless event station leaving */ 643 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 644 } 645 CURVNET_RESTORE(); 646} 647 648void 649ieee80211_notify_scan_done(struct ieee80211vap *vap) 650{ 651 struct ifnet *ifp = vap->iv_ifp; 652 653 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 654 655 /* dispatch wireless event indicating scan completed */ 656 CURVNET_SET(ifp->if_vnet); 657 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 658 CURVNET_RESTORE(); 659} 660 661void 662ieee80211_notify_replay_failure(struct ieee80211vap *vap, 663 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 664 u_int64_t rsc, int tid) 665{ 666 struct ifnet *ifp = vap->iv_ifp; 667 668 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 669 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 670 k->wk_cipher->ic_name, tid, (intmax_t) rsc, 671 (intmax_t) k->wk_keyrsc[tid], 672 k->wk_keyix, k->wk_rxkeyix); 673 674 if (ifp != NULL) { /* NB: for cipher test modules */ 675 struct ieee80211_replay_event iev; 676 677 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 678 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 679 iev.iev_cipher = k->wk_cipher->ic_cipher; 680 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 681 iev.iev_keyix = k->wk_rxkeyix; 682 else 683 iev.iev_keyix = k->wk_keyix; 684 iev.iev_keyrsc = k->wk_keyrsc[tid]; 685 iev.iev_rsc = rsc; 686 CURVNET_SET(ifp->if_vnet); 687 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 688 CURVNET_RESTORE(); 689 } 690} 691 692void 693ieee80211_notify_michael_failure(struct ieee80211vap *vap, 694 const struct ieee80211_frame *wh, u_int keyix) 695{ 696 struct ifnet *ifp = vap->iv_ifp; 697 698 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 699 "michael MIC verification failed <keyix %u>", keyix); 700 vap->iv_stats.is_rx_tkipmic++; 701 702 if (ifp != NULL) { /* NB: for cipher test modules */ 703 struct ieee80211_michael_event iev; 704 705 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 706 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 707 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 708 iev.iev_keyix = keyix; 709 CURVNET_SET(ifp->if_vnet); 710 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 711 CURVNET_RESTORE(); 712 } 713} 714 715void 716ieee80211_notify_wds_discover(struct ieee80211_node *ni) 717{ 718 struct ieee80211vap *vap = ni->ni_vap; 719 struct ifnet *ifp = vap->iv_ifp; 720 721 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 722} 723 724void 725ieee80211_notify_csa(struct ieee80211com *ic, 726 const struct ieee80211_channel *c, int mode, int count) 727{ 728 struct ieee80211_csa_event iev; 729 struct ieee80211vap *vap; 730 struct ifnet *ifp; 731 732 memset(&iev, 0, sizeof(iev)); 733 iev.iev_flags = c->ic_flags; 734 iev.iev_freq = c->ic_freq; 735 iev.iev_ieee = c->ic_ieee; 736 iev.iev_mode = mode; 737 iev.iev_count = count; 738 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 739 ifp = vap->iv_ifp; 740 CURVNET_SET(ifp->if_vnet); 741 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 742 CURVNET_RESTORE(); 743 } 744} 745 746void 747ieee80211_notify_radar(struct ieee80211com *ic, 748 const struct ieee80211_channel *c) 749{ 750 struct ieee80211_radar_event iev; 751 struct ieee80211vap *vap; 752 struct ifnet *ifp; 753 754 memset(&iev, 0, sizeof(iev)); 755 iev.iev_flags = c->ic_flags; 756 iev.iev_freq = c->ic_freq; 757 iev.iev_ieee = c->ic_ieee; 758 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 759 ifp = vap->iv_ifp; 760 CURVNET_SET(ifp->if_vnet); 761 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 762 CURVNET_RESTORE(); 763 } 764} 765 766void 767ieee80211_notify_cac(struct ieee80211com *ic, 768 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 769{ 770 struct ieee80211_cac_event iev; 771 struct ieee80211vap *vap; 772 struct ifnet *ifp; 773 774 memset(&iev, 0, sizeof(iev)); 775 iev.iev_flags = c->ic_flags; 776 iev.iev_freq = c->ic_freq; 777 iev.iev_ieee = c->ic_ieee; 778 iev.iev_type = type; 779 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 780 ifp = vap->iv_ifp; 781 CURVNET_SET(ifp->if_vnet); 782 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 783 CURVNET_RESTORE(); 784 } 785} 786 787void 788ieee80211_notify_node_deauth(struct ieee80211_node *ni) 789{ 790 struct ieee80211vap *vap = ni->ni_vap; 791 struct ifnet *ifp = vap->iv_ifp; 792 793 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 794 795 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 796} 797 798void 799ieee80211_notify_node_auth(struct ieee80211_node *ni) 800{ 801 struct ieee80211vap *vap = ni->ni_vap; 802 struct ifnet *ifp = vap->iv_ifp; 803 804 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 805 806 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 807} 808 809void 810ieee80211_notify_country(struct ieee80211vap *vap, 811 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 812{ 813 struct ifnet *ifp = vap->iv_ifp; 814 struct ieee80211_country_event iev; 815 816 memset(&iev, 0, sizeof(iev)); 817 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 818 iev.iev_cc[0] = cc[0]; 819 iev.iev_cc[1] = cc[1]; 820 CURVNET_SET(ifp->if_vnet); 821 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 822 CURVNET_RESTORE(); 823} 824 825void 826ieee80211_notify_radio(struct ieee80211com *ic, int state) 827{ 828 struct ieee80211_radio_event iev; 829 struct ieee80211vap *vap; 830 struct ifnet *ifp; 831 832 memset(&iev, 0, sizeof(iev)); 833 iev.iev_state = state; 834 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 835 ifp = vap->iv_ifp; 836 CURVNET_SET(ifp->if_vnet); 837 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 838 CURVNET_RESTORE(); 839 } 840} 841 842void 843ieee80211_load_module(const char *modname) 844{ 845 846#ifdef notyet 847 (void)kern_kldload(curthread, modname, NULL); 848#else 849 printf("%s: load the %s module by hand for now.\n", __func__, modname); 850#endif 851} 852 853static eventhandler_tag wlan_bpfevent; 854 855static void 856bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) 857{ 858 /* NB: identify vap's by if_init */ 859 if (dlt == DLT_IEEE802_11_RADIO && 860 ifp->if_init == ieee80211_init) { 861 struct ieee80211vap *vap = ifp->if_softc; 862 /* 863 * Track bpf radiotap listener state. We mark the vap 864 * to indicate if any listener is present and the com 865 * to indicate if any listener exists on any associated 866 * vap. This flag is used by drivers to prepare radiotap 867 * state only when needed. 868 */ 869 if (attach) { 870 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 871 if (vap->iv_opmode == IEEE80211_M_MONITOR) 872 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 873 } else if (!bpf_peers_present(vap->iv_rawbpf)) { 874 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 875 if (vap->iv_opmode == IEEE80211_M_MONITOR) 876 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 877 } 878 } 879} 880 881/* 882 * Module glue. 883 * 884 * NB: the module name is "wlan" for compatibility with NetBSD. 885 */ 886static int 887wlan_modevent(module_t mod, int type, void *unused) 888{ 889 switch (type) { 890 case MOD_LOAD: 891 if (bootverbose) 892 printf("wlan: <802.11 Link Layer>\n"); 893 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 894 bpf_track, 0, EVENTHANDLER_PRI_ANY); 895 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, 896 wlan_clone_destroy, 0); 897 return 0; 898 case MOD_UNLOAD: 899 if_clone_detach(wlan_cloner); 900 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 901 return 0; 902 } 903 return EINVAL; 904} 905 906static moduledata_t wlan_mod = { 907 wlanname, 908 wlan_modevent, 909 0 910}; 911DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 912MODULE_VERSION(wlan, 1); 913MODULE_DEPEND(wlan, ether, 1, 1, 1); 914#ifdef IEEE80211_ALQ 915MODULE_DEPEND(wlan, alq, 1, 1, 1); 916#endif /* IEEE80211_ALQ */ 917 918