2 * Copyright (c) 2010-2011 Monthadar Al Jaberi, TerraNet AB
5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer,
13 * without modification.
14 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
15 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
16 * redistribution must be conditioned upon including a substantially
17 * similar Disclaimer requirement for further binary redistribution.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
23 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
24 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
25 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
28 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGES.
34 #include "if_wtapvar.h"
35 #include <sys/uio.h> /* uio struct */
37 #include <net/if_var.h>
40 #include <net80211/ieee80211_ratectl.h>
41 #include "if_medium.h"
44 * This _requires_ vimage to be useful.
47 #error if_wtap requires VIMAGE.
50 /* device for IOCTL and read/write for debuggin purposes */
51 /* Function prototypes */
52 static d_open_t wtap_node_open;
53 static d_close_t wtap_node_close;
54 static d_write_t wtap_node_write;
55 static d_ioctl_t wtap_node_ioctl;
57 static struct cdevsw wtap_cdevsw = {
58 .d_version = D_VERSION,
60 .d_open = wtap_node_open,
61 .d_close = wtap_node_close,
62 .d_write = wtap_node_write,
63 .d_ioctl = wtap_node_ioctl,
68 wtap_node_open(struct cdev *dev, int oflags, int devtype, struct thread *p)
72 uprintf("Opened device \"echo\" successfully.\n");
77 wtap_node_close(struct cdev *dev, int fflag, int devtype, struct thread *p)
80 uprintf("Closing device \"echo.\"\n");
85 wtap_node_write(struct cdev *dev, struct uio *uio, int ioflag)
90 struct wtap_softc *sc;
94 uprintf("write device %s \"echo.\"\n", devtoname(dev));
95 buf_len = MIN(uio->uio_iov->iov_len, 1024);
96 err = copyin(uio->uio_iov->iov_base, buf, buf_len);
99 uprintf("Write failed: bad address!\n");
103 MGETHDR(m, M_NOWAIT, MT_DATA);
104 m_copyback(m, 0, buf_len, buf);
106 CURVNET_SET(TD_TO_VNET(curthread));
107 IFNET_RLOCK_NOSLEEP();
109 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
110 printf("ifp->if_xname = %s\n", ifp->if_xname);
111 if(strcmp(devtoname(dev), ifp->if_xname) == 0){
112 printf("found match, correspoding wtap = %s\n",
114 sc = (struct wtap_softc *)ifp->if_softc;
115 printf("wtap id = %d\n", sc->id);
120 IFNET_RUNLOCK_NOSLEEP();
127 wtap_node_ioctl(struct cdev *dev, u_long cmd, caddr_t data,
128 int fflag, struct thread *td)
134 DWTAP_PRINTF("Unkown WTAP IOCTL\n");
140 static int wtap_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
141 const struct ieee80211_bpf_params *params);
144 wtap_medium_enqueue(struct wtap_vap *avp, struct mbuf *m)
147 return medium_transmit(avp->av_md, avp->id, m);
151 wtap_media_change(struct ifnet *ifp)
154 DWTAP_PRINTF("%s\n", __func__);
155 int error = ieee80211_media_change(ifp);
156 /* NB: only the fixed rate can change and that doesn't need a reset */
157 return (error == ENETRESET ? 0 : error);
161 * Intercept management frames to collect beacon rssi data
162 * and to do ibss merges.
165 wtap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m,
166 int subtype, const struct ieee80211_rx_stats *stats, int rssi, int nf)
168 struct ieee80211vap *vap = ni->ni_vap;
170 DWTAP_PRINTF("[%d] %s\n", myath_id(ni), __func__);
172 WTAP_VAP(vap)->av_recv_mgmt(ni, m, subtype, stats, rssi, nf);
176 wtap_reset_vap(struct ieee80211vap *vap, u_long cmd)
179 DWTAP_PRINTF("%s\n", __func__);
184 wtap_beacon_update(struct ieee80211vap *vap, int item)
186 struct ieee80211_beacon_offsets *bo = &WTAP_VAP(vap)->av_boff;
188 DWTAP_PRINTF("%s\n", __func__);
189 setbit(bo->bo_flags, item);
193 * Allocate and setup an initial beacon frame.
196 wtap_beacon_alloc(struct wtap_softc *sc, struct ieee80211_node *ni)
198 struct ieee80211vap *vap = ni->ni_vap;
199 struct wtap_vap *avp = WTAP_VAP(vap);
201 DWTAP_PRINTF("[%s] %s\n", ether_sprintf(ni->ni_macaddr), __func__);
204 * NB: the beacon data buffer must be 32-bit aligned;
205 * we assume the mbuf routines will return us something
206 * with this alignment (perhaps should assert).
208 avp->beacon = ieee80211_beacon_alloc(ni, &avp->av_boff);
209 if (avp->beacon == NULL) {
210 printf("%s: cannot get mbuf\n", __func__);
213 callout_init(&avp->av_swba, 0);
214 avp->bf_node = ieee80211_ref_node(ni);
220 wtap_beacon_config(struct wtap_softc *sc, struct ieee80211vap *vap)
223 DWTAP_PRINTF("%s\n", __func__);
227 wtap_beacon_intrp(void *arg)
229 struct wtap_vap *avp = arg;
230 struct ieee80211vap *vap = arg;
233 if (vap->iv_state < IEEE80211_S_RUN) {
234 DWTAP_PRINTF("Skip beacon, not running, state %d", vap->iv_state);
237 DWTAP_PRINTF("[%d] beacon intrp\n", avp->id); //burst mode
239 * Update dynamic beacon contents. If this returns
240 * non-zero then we need to remap the memory because
241 * the beacon frame changed size (probably because
242 * of the TIM bitmap).
244 m = m_dup(avp->beacon, M_NOWAIT);
245 if (ieee80211_beacon_update(avp->bf_node, &avp->av_boff, m, 0)) {
246 printf("%s, need to remap the memory because the beacon frame"
247 " changed size.\n",__func__);
250 if (ieee80211_radiotap_active_vap(vap))
251 ieee80211_radiotap_tx(vap, m);
254 medium_transmit(avp->av_md, avp->id, m);
256 wtap_medium_enqueue(avp, m);
257 callout_schedule(&avp->av_swba, avp->av_bcinterval);
261 wtap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
263 struct ieee80211com *ic = vap->iv_ic;
264 struct wtap_softc *sc = ic->ic_softc;
265 struct wtap_vap *avp = WTAP_VAP(vap);
266 struct ieee80211_node *ni = NULL;
269 DWTAP_PRINTF("%s\n", __func__);
271 ni = ieee80211_ref_node(vap->iv_bss);
273 * Invoke the parent method to do net80211 work.
275 error = avp->av_newstate(vap, nstate, arg);
279 if (nstate == IEEE80211_S_RUN) {
280 /* NB: collect bss node again, it may have changed */
281 ieee80211_free_node(ni);
282 ni = ieee80211_ref_node(vap->iv_bss);
283 switch (vap->iv_opmode) {
284 case IEEE80211_M_MBSS:
285 error = wtap_beacon_alloc(sc, ni);
288 wtap_beacon_config(sc, vap);
289 callout_reset(&avp->av_swba, avp->av_bcinterval,
290 wtap_beacon_intrp, vap);
295 } else if (nstate == IEEE80211_S_INIT) {
296 callout_stop(&avp->av_swba);
298 ieee80211_free_node(ni);
301 printf("%s: bad\n", __func__);
302 ieee80211_free_node(ni);
307 wtap_bmiss(struct ieee80211vap *vap)
309 struct wtap_vap *avp = (struct wtap_vap *)vap;
311 DWTAP_PRINTF("%s\n", __func__);
315 static struct ieee80211vap *
316 wtap_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ],
317 int unit, enum ieee80211_opmode opmode, int flags,
318 const uint8_t bssid[IEEE80211_ADDR_LEN],
319 const uint8_t mac[IEEE80211_ADDR_LEN])
321 struct wtap_softc *sc = ic->ic_softc;
322 struct ieee80211vap *vap;
323 struct wtap_vap *avp;
325 struct ieee80211_node *ni;
327 DWTAP_PRINTF("%s\n", __func__);
329 avp = malloc(sizeof(struct wtap_vap), M_80211_VAP, M_WAITOK | M_ZERO);
331 avp->av_md = sc->sc_md;
332 avp->av_bcinterval = msecs_to_ticks(BEACON_INTRERVAL + 100*sc->id);
333 vap = (struct ieee80211vap *) avp;
334 error = ieee80211_vap_setup(ic, vap, name, unit, IEEE80211_M_MBSS,
335 flags | IEEE80211_CLONE_NOBEACONS, bssid);
337 free(avp, M_80211_VAP);
341 /* override various methods */
342 avp->av_recv_mgmt = vap->iv_recv_mgmt;
343 vap->iv_recv_mgmt = wtap_recv_mgmt;
344 vap->iv_reset = wtap_reset_vap;
345 vap->iv_update_beacon = wtap_beacon_update;
346 avp->av_newstate = vap->iv_newstate;
347 vap->iv_newstate = wtap_newstate;
348 avp->av_bmiss = vap->iv_bmiss;
349 vap->iv_bmiss = wtap_bmiss;
352 ieee80211_vap_attach(vap, wtap_media_change, ieee80211_media_status,
354 avp->av_dev = make_dev(&wtap_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
355 "%s", (const char *)sc->name);
357 /* TODO this is a hack to force it to choose the rate we want */
358 ni = ieee80211_ref_node(vap->iv_bss);
360 ieee80211_free_node(ni);
365 wtap_vap_delete(struct ieee80211vap *vap)
367 struct wtap_vap *avp = WTAP_VAP(vap);
369 DWTAP_PRINTF("%s\n", __func__);
370 destroy_dev(avp->av_dev);
371 callout_stop(&avp->av_swba);
372 ieee80211_vap_detach(vap);
373 free((struct wtap_vap*) vap, M_80211_VAP);
377 wtap_parent(struct ieee80211com *ic)
379 struct wtap_softc *sc = ic->ic_softc;
381 if (ic->ic_nrunning > 0) {
383 ieee80211_start_all(ic);
389 wtap_scan_start(struct ieee80211com *ic)
393 DWTAP_PRINTF("%s\n", __func__);
398 wtap_scan_end(struct ieee80211com *ic)
402 DWTAP_PRINTF("%s\n", __func__);
407 wtap_set_channel(struct ieee80211com *ic)
411 DWTAP_PRINTF("%s\n", __func__);
416 wtap_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
417 const struct ieee80211_bpf_params *params)
420 DWTAP_PRINTF("%s, %p\n", __func__, m);
422 struct ieee80211vap *vap = ni->ni_vap;
423 struct wtap_vap *avp = WTAP_VAP(vap);
425 if (ieee80211_radiotap_active_vap(vap)) {
426 ieee80211_radiotap_tx(vap, m);
428 if (m->m_flags & M_TXCB)
429 ieee80211_process_callback(ni, m, 0);
430 ieee80211_free_node(ni);
431 return wtap_medium_enqueue(avp, m);
435 wtap_inject(struct wtap_softc *sc, struct mbuf *m)
437 struct wtap_buf *bf = (struct wtap_buf *)malloc(sizeof(struct wtap_buf),
438 M_WTAP_RXBUF, M_NOWAIT | M_ZERO);
439 KASSERT(bf != NULL, ("could not allocated a new wtap_buf\n"));
442 mtx_lock(&sc->sc_mtx);
443 STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list);
444 taskqueue_enqueue(sc->sc_tq, &sc->sc_rxtask);
445 mtx_unlock(&sc->sc_mtx);
449 wtap_rx_deliver(struct wtap_softc *sc, struct mbuf *m)
451 struct ieee80211com *ic = &sc->sc_ic;
452 struct ieee80211_node *ni;
455 DWTAP_PRINTF("%s\n", __func__);
458 DWTAP_PRINTF("[%d] receiving m=%p\n", sc->id, m);
459 if (m == NULL) { /* NB: shouldn't happen */
460 ic_printf(ic, "%s: no mbuf!\n", __func__);
463 ieee80211_dump_pkt(ic, mtod(m, caddr_t), 0,0,0);
466 * Locate the node for sender, track state, and then
467 * pass the (referenced) node up to the 802.11 layer
470 ni = ieee80211_find_rxnode_withkey(ic,
471 mtod(m, const struct ieee80211_frame_min *),IEEE80211_KEYIX_NONE);
474 * Sending station is known, dispatch directly.
476 type = ieee80211_input(ni, m, 1<<7, 10);
477 ieee80211_free_node(ni);
479 type = ieee80211_input_all(ic, m, 1<<7, 10);
484 wtap_rx_proc(void *arg, int npending)
486 struct wtap_softc *sc = (struct wtap_softc *)arg;
487 struct ieee80211com *ic = &sc->sc_ic;
489 struct ieee80211_node *ni;
494 DWTAP_PRINTF("%s\n", __func__);
498 mtx_lock(&sc->sc_mtx);
499 bf = STAILQ_FIRST(&sc->sc_rxbuf);
501 mtx_unlock(&sc->sc_mtx);
504 STAILQ_REMOVE_HEAD(&sc->sc_rxbuf, bf_list);
505 mtx_unlock(&sc->sc_mtx);
506 KASSERT(bf != NULL, ("wtap_buf is NULL\n"));
508 DWTAP_PRINTF("[%d] receiving m=%p\n", sc->id, bf->m);
509 if (m == NULL) { /* NB: shouldn't happen */
510 ic_printf(ic, "%s: no mbuf!\n", __func__);
511 free(bf, M_WTAP_RXBUF);
515 ieee80211_dump_pkt(ic, mtod(m, caddr_t), 0,0,0);
519 * Locate the node for sender, track state, and then
520 * pass the (referenced) node up to the 802.11 layer
523 ni = ieee80211_find_rxnode_withkey(ic,
524 mtod(m, const struct ieee80211_frame_min *),
525 IEEE80211_KEYIX_NONE);
528 * Sending station is known, dispatch directly.
531 ieee80211_radiotap_rx(ni->ni_vap, m);
533 type = ieee80211_input(ni, m, 1<<7, 10);
534 ieee80211_free_node(ni);
537 ieee80211_radiotap_rx_all(ic, m);
539 type = ieee80211_input_all(ic, m, 1<<7, 10);
542 /* The mbufs are freed by the Net80211 stack */
543 free(bf, M_WTAP_RXBUF);
548 wtap_newassoc(struct ieee80211_node *ni, int isnew)
551 DWTAP_PRINTF("%s\n", __func__);
555 * Callback from the 802.11 layer to update WME parameters.
558 wtap_wme_update(struct ieee80211com *ic)
561 DWTAP_PRINTF("%s\n", __func__);
566 wtap_update_mcast(struct ieee80211com *ic)
569 DWTAP_PRINTF("%s\n", __func__);
573 wtap_update_promisc(struct ieee80211com *ic)
576 DWTAP_PRINTF("%s\n", __func__);
580 wtap_transmit(struct ieee80211com *ic, struct mbuf *m)
582 struct ieee80211_node *ni =
583 (struct ieee80211_node *) m->m_pkthdr.rcvif;
584 struct ieee80211vap *vap = ni->ni_vap;
585 struct wtap_vap *avp = WTAP_VAP(vap);
588 printf("m->m_pkthdr.rcvif is NULL we cant radiotap_tx\n");
590 if (ieee80211_radiotap_active_vap(vap))
591 ieee80211_radiotap_tx(vap, m);
593 if (m->m_flags & M_TXCB)
594 ieee80211_process_callback(ni, m, 0);
595 ieee80211_free_node(ni);
596 return wtap_medium_enqueue(avp, m);
599 static struct ieee80211_node *
600 wtap_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
602 struct ieee80211_node *ni;
604 DWTAP_PRINTF("%s\n", __func__);
606 ni = malloc(sizeof(struct ieee80211_node), M_80211_NODE,
614 wtap_node_free(struct ieee80211_node *ni)
616 struct ieee80211com *ic = ni->ni_ic;
617 struct wtap_softc *sc = ic->ic_softc;
619 DWTAP_PRINTF("%s\n", __func__);
620 sc->sc_node_free(ni);
624 wtap_attach(struct wtap_softc *sc, const uint8_t *macaddr)
626 struct ieee80211com *ic = &sc->sc_ic;
628 DWTAP_PRINTF("%s\n", __func__);
631 STAILQ_INIT(&sc->sc_rxbuf);
632 sc->sc_tq = taskqueue_create("wtap_taskq", M_NOWAIT | M_ZERO,
633 taskqueue_thread_enqueue, &sc->sc_tq);
634 taskqueue_start_threads(&sc->sc_tq, 1, PI_SOFT, "%s taskQ", sc->name);
635 TASK_INIT(&sc->sc_rxtask, 0, wtap_rx_proc, sc);
638 ic->ic_name = sc->name;
639 ic->ic_phytype = IEEE80211_T_DS;
640 ic->ic_opmode = IEEE80211_M_MBSS;
641 ic->ic_caps = IEEE80211_C_MBSS;
643 ic->ic_max_keyix = 128; /* A value read from Atheros ATH_KEYMAX */
645 ic->ic_regdomain.regdomain = SKU_ETSI;
646 ic->ic_regdomain.country = CTRY_SWEDEN;
647 ic->ic_regdomain.location = 1; /* Indoors */
648 ic->ic_regdomain.isocc[0] = 'S';
649 ic->ic_regdomain.isocc[1] = 'E';
652 ic->ic_channels[0].ic_flags = IEEE80211_CHAN_B;
653 ic->ic_channels[0].ic_freq = 2412;
655 IEEE80211_ADDR_COPY(ic->ic_macaddr, macaddr);
656 ieee80211_ifattach(ic);
658 /* override default methods */
659 ic->ic_newassoc = wtap_newassoc;
660 ic->ic_wme.wme_update = wtap_wme_update;
661 ic->ic_vap_create = wtap_vap_create;
662 ic->ic_vap_delete = wtap_vap_delete;
663 ic->ic_raw_xmit = wtap_raw_xmit;
664 ic->ic_update_mcast = wtap_update_mcast;
665 ic->ic_update_promisc = wtap_update_promisc;
666 ic->ic_transmit = wtap_transmit;
667 ic->ic_parent = wtap_parent;
669 sc->sc_node_alloc = ic->ic_node_alloc;
670 ic->ic_node_alloc = wtap_node_alloc;
671 sc->sc_node_free = ic->ic_node_free;
672 ic->ic_node_free = wtap_node_free;
674 ic->ic_scan_start = wtap_scan_start;
675 ic->ic_scan_end = wtap_scan_end;
676 ic->ic_set_channel = wtap_set_channel;
678 ieee80211_radiotap_attach(ic,
679 &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th),
680 WTAP_TX_RADIOTAP_PRESENT,
681 &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th),
682 WTAP_RX_RADIOTAP_PRESENT);
684 /* Work here, we must find a way to populate the rate table */
686 if(ic->ic_rt == NULL){
687 printf("no table for ic_curchan\n");
688 ic->ic_rt = ieee80211_get_ratetable(&ic->ic_channels[0]);
690 printf("ic->ic_rt =%p\n", ic->ic_rt);
691 printf("rate count %d\n", ic->ic_rt->rateCount);
693 uint8_t code = ic->ic_rt->info[0].dot11Rate;
694 uint8_t cix = ic->ic_rt->info[0].ctlRateIndex;
695 uint8_t ctl_rate = ic->ic_rt->info[cix].dot11Rate;
696 printf("code=%d, cix=%d, ctl_rate=%d\n", code, cix, ctl_rate);
698 uint8_t rix0 = ic->ic_rt->rateCodeToIndex[130];
699 uint8_t rix1 = ic->ic_rt->rateCodeToIndex[132];
700 uint8_t rix2 = ic->ic_rt->rateCodeToIndex[139];
701 uint8_t rix3 = ic->ic_rt->rateCodeToIndex[150];
702 printf("rix0 %u,rix1 %u,rix2 %u,rix3 %u\n", rix0,rix1,rix2,rix3);
703 printf("lpAckDuration=%u\n", ic->ic_rt->info[0].lpAckDuration);
704 printf("rate=%d\n", ic->ic_rt->info[0].rateKbps);
710 wtap_detach(struct wtap_softc *sc)
712 struct ieee80211com *ic = &sc->sc_ic;
714 DWTAP_PRINTF("%s\n", __func__);
715 ieee80211_ageq_drain(&ic->ic_stageq);
716 ieee80211_ifdetach(ic);
721 wtap_resume(struct wtap_softc *sc)
724 DWTAP_PRINTF("%s\n", __func__);
728 wtap_suspend(struct wtap_softc *sc)
731 DWTAP_PRINTF("%s\n", __func__);
735 wtap_shutdown(struct wtap_softc *sc)
738 DWTAP_PRINTF("%s\n", __func__);
742 wtap_intr(struct wtap_softc *sc)
745 DWTAP_PRINTF("%s\n", __func__);