29
30/*
31 * IEEE 802.11 generic handler
32 */
33#include "opt_wlan.h"
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38
39#include <sys/socket.h>
40
41#include <net/if.h>
42#include <net/if_dl.h>
43#include <net/if_media.h>
44#include <net/if_types.h>
45#include <net/ethernet.h>
46
47#include <net80211/ieee80211_var.h>
48#include <net80211/ieee80211_regdomain.h>
49#ifdef IEEE80211_SUPPORT_SUPERG
50#include <net80211/ieee80211_superg.h>
51#endif
52#include <net80211/ieee80211_ratectl.h>
53
54#include <net/bpf.h>
55
56const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
57 [IEEE80211_MODE_AUTO] = "auto",
58 [IEEE80211_MODE_11A] = "11a",
59 [IEEE80211_MODE_11B] = "11b",
60 [IEEE80211_MODE_11G] = "11g",
61 [IEEE80211_MODE_FH] = "FH",
62 [IEEE80211_MODE_TURBO_A] = "turboA",
63 [IEEE80211_MODE_TURBO_G] = "turboG",
64 [IEEE80211_MODE_STURBO_A] = "sturboA",
65 [IEEE80211_MODE_HALF] = "half",
66 [IEEE80211_MODE_QUARTER] = "quarter",
67 [IEEE80211_MODE_11NA] = "11na",
68 [IEEE80211_MODE_11NG] = "11ng",
69};
70/* map ieee80211_opmode to the corresponding capability bit */
71const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
72 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
73 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
74 [IEEE80211_M_STA] = IEEE80211_C_STA,
75 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
76 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
77 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
78#ifdef IEEE80211_SUPPORT_MESH
79 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
80#endif
81};
82
83static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
84 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
85
86static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
87static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
88static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
89static int ieee80211_media_setup(struct ieee80211com *ic,
90 struct ifmedia *media, int caps, int addsta,
91 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
92static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
93static int ieee80211com_media_change(struct ifnet *);
94static int media_status(enum ieee80211_opmode,
95 const struct ieee80211_channel *);
96
97MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
98
99/*
100 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
101 */
102#define B(r) ((r) | IEEE80211_RATE_BASIC)
103static const struct ieee80211_rateset ieee80211_rateset_11a =
104 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
105static const struct ieee80211_rateset ieee80211_rateset_half =
106 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
107static const struct ieee80211_rateset ieee80211_rateset_quarter =
108 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
109static const struct ieee80211_rateset ieee80211_rateset_11b =
110 { 4, { B(2), B(4), B(11), B(22) } };
111/* NB: OFDM rates are handled specially based on mode */
112static const struct ieee80211_rateset ieee80211_rateset_11g =
113 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
114#undef B
115
116/*
117 * Fill in 802.11 available channel set, mark
118 * all available channels as active, and pick
119 * a default channel if not already specified.
120 */
121static void
122ieee80211_chan_init(struct ieee80211com *ic)
123{
124#define DEFAULTRATES(m, def) do { \
125 if (ic->ic_sup_rates[m].rs_nrates == 0) \
126 ic->ic_sup_rates[m] = def; \
127} while (0)
128 struct ieee80211_channel *c;
129 int i;
130
131 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
132 ("invalid number of channels specified: %u", ic->ic_nchans));
133 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
134 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
135 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
136 for (i = 0; i < ic->ic_nchans; i++) {
137 c = &ic->ic_channels[i];
138 KASSERT(c->ic_flags != 0, ("channel with no flags"));
139 /*
140 * Help drivers that work only with frequencies by filling
141 * in IEEE channel #'s if not already calculated. Note this
142 * mimics similar work done in ieee80211_setregdomain when
143 * changing regulatory state.
144 */
145 if (c->ic_ieee == 0)
146 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
147 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
148 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
149 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
150 c->ic_flags);
151 /* default max tx power to max regulatory */
152 if (c->ic_maxpower == 0)
153 c->ic_maxpower = 2*c->ic_maxregpower;
154 setbit(ic->ic_chan_avail, c->ic_ieee);
155 /*
156 * Identify mode capabilities.
157 */
158 if (IEEE80211_IS_CHAN_A(c))
159 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
160 if (IEEE80211_IS_CHAN_B(c))
161 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
162 if (IEEE80211_IS_CHAN_ANYG(c))
163 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
164 if (IEEE80211_IS_CHAN_FHSS(c))
165 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
166 if (IEEE80211_IS_CHAN_108A(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
168 if (IEEE80211_IS_CHAN_108G(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
170 if (IEEE80211_IS_CHAN_ST(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
172 if (IEEE80211_IS_CHAN_HALF(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
174 if (IEEE80211_IS_CHAN_QUARTER(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
176 if (IEEE80211_IS_CHAN_HTA(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
178 if (IEEE80211_IS_CHAN_HTG(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
180 }
181 /* initialize candidate channels to all available */
182 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
183 sizeof(ic->ic_chan_avail));
184
185 /* sort channel table to allow lookup optimizations */
186 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
187
188 /* invalidate any previous state */
189 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
190 ic->ic_prevchan = NULL;
191 ic->ic_csa_newchan = NULL;
192 /* arbitrarily pick the first channel */
193 ic->ic_curchan = &ic->ic_channels[0];
194 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
195
196 /* fillin well-known rate sets if driver has not specified */
197 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
198 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
199 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
200 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
201 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
202 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
203 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
204 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
205 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
206 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
207
208 /*
209 * Setup required information to fill the mcsset field, if driver did
210 * not. Assume a 2T2R setup for historic reasons.
211 */
212 if (ic->ic_rxstream == 0)
213 ic->ic_rxstream = 2;
214 if (ic->ic_txstream == 0)
215 ic->ic_txstream = 2;
216
217 /*
218 * Set auto mode to reset active channel state and any desired channel.
219 */
220 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
221#undef DEFAULTRATES
222}
223
224static void
225null_update_mcast(struct ifnet *ifp)
226{
227 if_printf(ifp, "need multicast update callback\n");
228}
229
230static void
231null_update_promisc(struct ifnet *ifp)
232{
233 if_printf(ifp, "need promiscuous mode update callback\n");
234}
235
236static int
237null_transmit(struct ifnet *ifp, struct mbuf *m)
238{
239 m_freem(m);
240 ifp->if_oerrors++;
241 return EACCES; /* XXX EIO/EPERM? */
242}
243
244static int
245null_output(struct ifnet *ifp, struct mbuf *m,
| 29
30/*
31 * IEEE 802.11 generic handler
32 */
33#include "opt_wlan.h"
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38
39#include <sys/socket.h>
40
41#include <net/if.h>
42#include <net/if_dl.h>
43#include <net/if_media.h>
44#include <net/if_types.h>
45#include <net/ethernet.h>
46
47#include <net80211/ieee80211_var.h>
48#include <net80211/ieee80211_regdomain.h>
49#ifdef IEEE80211_SUPPORT_SUPERG
50#include <net80211/ieee80211_superg.h>
51#endif
52#include <net80211/ieee80211_ratectl.h>
53
54#include <net/bpf.h>
55
56const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
57 [IEEE80211_MODE_AUTO] = "auto",
58 [IEEE80211_MODE_11A] = "11a",
59 [IEEE80211_MODE_11B] = "11b",
60 [IEEE80211_MODE_11G] = "11g",
61 [IEEE80211_MODE_FH] = "FH",
62 [IEEE80211_MODE_TURBO_A] = "turboA",
63 [IEEE80211_MODE_TURBO_G] = "turboG",
64 [IEEE80211_MODE_STURBO_A] = "sturboA",
65 [IEEE80211_MODE_HALF] = "half",
66 [IEEE80211_MODE_QUARTER] = "quarter",
67 [IEEE80211_MODE_11NA] = "11na",
68 [IEEE80211_MODE_11NG] = "11ng",
69};
70/* map ieee80211_opmode to the corresponding capability bit */
71const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
72 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
73 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
74 [IEEE80211_M_STA] = IEEE80211_C_STA,
75 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
76 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
77 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
78#ifdef IEEE80211_SUPPORT_MESH
79 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
80#endif
81};
82
83static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
84 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
85
86static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
87static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
88static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
89static int ieee80211_media_setup(struct ieee80211com *ic,
90 struct ifmedia *media, int caps, int addsta,
91 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
92static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
93static int ieee80211com_media_change(struct ifnet *);
94static int media_status(enum ieee80211_opmode,
95 const struct ieee80211_channel *);
96
97MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
98
99/*
100 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
101 */
102#define B(r) ((r) | IEEE80211_RATE_BASIC)
103static const struct ieee80211_rateset ieee80211_rateset_11a =
104 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
105static const struct ieee80211_rateset ieee80211_rateset_half =
106 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
107static const struct ieee80211_rateset ieee80211_rateset_quarter =
108 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
109static const struct ieee80211_rateset ieee80211_rateset_11b =
110 { 4, { B(2), B(4), B(11), B(22) } };
111/* NB: OFDM rates are handled specially based on mode */
112static const struct ieee80211_rateset ieee80211_rateset_11g =
113 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
114#undef B
115
116/*
117 * Fill in 802.11 available channel set, mark
118 * all available channels as active, and pick
119 * a default channel if not already specified.
120 */
121static void
122ieee80211_chan_init(struct ieee80211com *ic)
123{
124#define DEFAULTRATES(m, def) do { \
125 if (ic->ic_sup_rates[m].rs_nrates == 0) \
126 ic->ic_sup_rates[m] = def; \
127} while (0)
128 struct ieee80211_channel *c;
129 int i;
130
131 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
132 ("invalid number of channels specified: %u", ic->ic_nchans));
133 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
134 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
135 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
136 for (i = 0; i < ic->ic_nchans; i++) {
137 c = &ic->ic_channels[i];
138 KASSERT(c->ic_flags != 0, ("channel with no flags"));
139 /*
140 * Help drivers that work only with frequencies by filling
141 * in IEEE channel #'s if not already calculated. Note this
142 * mimics similar work done in ieee80211_setregdomain when
143 * changing regulatory state.
144 */
145 if (c->ic_ieee == 0)
146 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
147 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
148 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
149 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
150 c->ic_flags);
151 /* default max tx power to max regulatory */
152 if (c->ic_maxpower == 0)
153 c->ic_maxpower = 2*c->ic_maxregpower;
154 setbit(ic->ic_chan_avail, c->ic_ieee);
155 /*
156 * Identify mode capabilities.
157 */
158 if (IEEE80211_IS_CHAN_A(c))
159 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
160 if (IEEE80211_IS_CHAN_B(c))
161 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
162 if (IEEE80211_IS_CHAN_ANYG(c))
163 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
164 if (IEEE80211_IS_CHAN_FHSS(c))
165 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
166 if (IEEE80211_IS_CHAN_108A(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
168 if (IEEE80211_IS_CHAN_108G(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
170 if (IEEE80211_IS_CHAN_ST(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
172 if (IEEE80211_IS_CHAN_HALF(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
174 if (IEEE80211_IS_CHAN_QUARTER(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
176 if (IEEE80211_IS_CHAN_HTA(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
178 if (IEEE80211_IS_CHAN_HTG(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
180 }
181 /* initialize candidate channels to all available */
182 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
183 sizeof(ic->ic_chan_avail));
184
185 /* sort channel table to allow lookup optimizations */
186 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
187
188 /* invalidate any previous state */
189 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
190 ic->ic_prevchan = NULL;
191 ic->ic_csa_newchan = NULL;
192 /* arbitrarily pick the first channel */
193 ic->ic_curchan = &ic->ic_channels[0];
194 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
195
196 /* fillin well-known rate sets if driver has not specified */
197 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
198 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
199 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
200 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
201 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
202 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
203 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
204 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
205 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
206 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
207
208 /*
209 * Setup required information to fill the mcsset field, if driver did
210 * not. Assume a 2T2R setup for historic reasons.
211 */
212 if (ic->ic_rxstream == 0)
213 ic->ic_rxstream = 2;
214 if (ic->ic_txstream == 0)
215 ic->ic_txstream = 2;
216
217 /*
218 * Set auto mode to reset active channel state and any desired channel.
219 */
220 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
221#undef DEFAULTRATES
222}
223
224static void
225null_update_mcast(struct ifnet *ifp)
226{
227 if_printf(ifp, "need multicast update callback\n");
228}
229
230static void
231null_update_promisc(struct ifnet *ifp)
232{
233 if_printf(ifp, "need promiscuous mode update callback\n");
234}
235
236static int
237null_transmit(struct ifnet *ifp, struct mbuf *m)
238{
239 m_freem(m);
240 ifp->if_oerrors++;
241 return EACCES; /* XXX EIO/EPERM? */
242}
243
244static int
245null_output(struct ifnet *ifp, struct mbuf *m,
|
247{
248 if_printf(ifp, "discard raw packet\n");
249 return null_transmit(ifp, m);
250}
251
252static void
253null_input(struct ifnet *ifp, struct mbuf *m)
254{
255 if_printf(ifp, "if_input should not be called\n");
256 m_freem(m);
257}
258
259static void
260null_update_chw(struct ieee80211com *ic)
261{
262
263 if_printf(ic->ic_ifp, "%s: need callback\n", __func__);
264}
265
266/*
267 * Attach/setup the common net80211 state. Called by
268 * the driver on attach to prior to creating any vap's.
269 */
270void
271ieee80211_ifattach(struct ieee80211com *ic,
272 const uint8_t macaddr[IEEE80211_ADDR_LEN])
273{
274 struct ifnet *ifp = ic->ic_ifp;
275 struct sockaddr_dl *sdl;
276 struct ifaddr *ifa;
277
278 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
279
280 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
281 IEEE80211_TX_LOCK_INIT(ic, ifp->if_xname);
282 TAILQ_INIT(&ic->ic_vaps);
283
284 /* Create a taskqueue for all state changes */
285 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
286 taskqueue_thread_enqueue, &ic->ic_tq);
287 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
288 ifp->if_xname);
289 /*
290 * Fill in 802.11 available channel set, mark all
291 * available channels as active, and pick a default
292 * channel if not already specified.
293 */
294 ieee80211_media_init(ic);
295
296 ic->ic_update_mcast = null_update_mcast;
297 ic->ic_update_promisc = null_update_promisc;
298 ic->ic_update_chw = null_update_chw;
299
300 ic->ic_hash_key = arc4random();
301 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
302 ic->ic_lintval = ic->ic_bintval;
303 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
304
305 ieee80211_crypto_attach(ic);
306 ieee80211_node_attach(ic);
307 ieee80211_power_attach(ic);
308 ieee80211_proto_attach(ic);
309#ifdef IEEE80211_SUPPORT_SUPERG
310 ieee80211_superg_attach(ic);
311#endif
312 ieee80211_ht_attach(ic);
313 ieee80211_scan_attach(ic);
314 ieee80211_regdomain_attach(ic);
315 ieee80211_dfs_attach(ic);
316
317 ieee80211_sysctl_attach(ic);
318
319 ifp->if_addrlen = IEEE80211_ADDR_LEN;
320 ifp->if_hdrlen = 0;
321
322 CURVNET_SET(vnet0);
323
324 if_attach(ifp);
325
326 ifp->if_mtu = IEEE80211_MTU_MAX;
327 ifp->if_broadcastaddr = ieee80211broadcastaddr;
328 ifp->if_output = null_output;
329 ifp->if_input = null_input; /* just in case */
330 ifp->if_resolvemulti = NULL; /* NB: callers check */
331
332 ifa = ifaddr_byindex(ifp->if_index);
333 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
334 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
335 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
336 sdl->sdl_alen = IEEE80211_ADDR_LEN;
337 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
338 ifa_free(ifa);
339
340 CURVNET_RESTORE();
341}
342
343/*
344 * Detach net80211 state on device detach. Tear down
345 * all vap's and reclaim all common state prior to the
346 * device state going away. Note we may call back into
347 * driver; it must be prepared for this.
348 */
349void
350ieee80211_ifdetach(struct ieee80211com *ic)
351{
352 struct ifnet *ifp = ic->ic_ifp;
353 struct ieee80211vap *vap;
354
355 /*
356 * This detaches the main interface, but not the vaps.
357 * Each VAP may be in a separate VIMAGE.
358 */
359 CURVNET_SET(ifp->if_vnet);
360 if_detach(ifp);
361 CURVNET_RESTORE();
362
363 /*
364 * The VAP is responsible for setting and clearing
365 * the VIMAGE context.
366 */
367 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
368 ieee80211_vap_destroy(vap);
369 ieee80211_waitfor_parent(ic);
370
371 ieee80211_sysctl_detach(ic);
372 ieee80211_dfs_detach(ic);
373 ieee80211_regdomain_detach(ic);
374 ieee80211_scan_detach(ic);
375#ifdef IEEE80211_SUPPORT_SUPERG
376 ieee80211_superg_detach(ic);
377#endif
378 ieee80211_ht_detach(ic);
379 /* NB: must be called before ieee80211_node_detach */
380 ieee80211_proto_detach(ic);
381 ieee80211_crypto_detach(ic);
382 ieee80211_power_detach(ic);
383 ieee80211_node_detach(ic);
384
385 /* XXX VNET needed? */
386 ifmedia_removeall(&ic->ic_media);
387
388 taskqueue_free(ic->ic_tq);
389 IEEE80211_TX_LOCK_DESTROY(ic);
390 IEEE80211_LOCK_DESTROY(ic);
391}
392
393/*
394 * Default reset method for use with the ioctl support. This
395 * method is invoked after any state change in the 802.11
396 * layer that should be propagated to the hardware but not
397 * require re-initialization of the 802.11 state machine (e.g
398 * rescanning for an ap). We always return ENETRESET which
399 * should cause the driver to re-initialize the device. Drivers
400 * can override this method to implement more optimized support.
401 */
402static int
403default_reset(struct ieee80211vap *vap, u_long cmd)
404{
405 return ENETRESET;
406}
407
408/*
409 * Prepare a vap for use. Drivers use this call to
410 * setup net80211 state in new vap's prior attaching
411 * them with ieee80211_vap_attach (below).
412 */
413int
414ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
415 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
416 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN],
417 const uint8_t macaddr[IEEE80211_ADDR_LEN])
418{
419 struct ifnet *ifp;
420
421 ifp = if_alloc(IFT_ETHER);
422 if (ifp == NULL) {
423 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
424 __func__);
425 return ENOMEM;
426 }
427 if_initname(ifp, name, unit);
428 ifp->if_softc = vap; /* back pointer */
429 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
430 ifp->if_start = ieee80211_start;
431 ifp->if_ioctl = ieee80211_ioctl;
432 ifp->if_init = ieee80211_init;
433 /* NB: input+output filled in by ether_ifattach */
434 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
435 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
436 IFQ_SET_READY(&ifp->if_snd);
437
438 vap->iv_ifp = ifp;
439 vap->iv_ic = ic;
440 vap->iv_flags = ic->ic_flags; /* propagate common flags */
441 vap->iv_flags_ext = ic->ic_flags_ext;
442 vap->iv_flags_ven = ic->ic_flags_ven;
443 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
444 vap->iv_htcaps = ic->ic_htcaps;
445 vap->iv_htextcaps = ic->ic_htextcaps;
446 vap->iv_opmode = opmode;
447 vap->iv_caps |= ieee80211_opcap[opmode];
448 switch (opmode) {
449 case IEEE80211_M_WDS:
450 /*
451 * WDS links must specify the bssid of the far end.
452 * For legacy operation this is a static relationship.
453 * For non-legacy operation the station must associate
454 * and be authorized to pass traffic. Plumbing the
455 * vap to the proper node happens when the vap
456 * transitions to RUN state.
457 */
458 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
459 vap->iv_flags |= IEEE80211_F_DESBSSID;
460 if (flags & IEEE80211_CLONE_WDSLEGACY)
461 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
462 break;
463#ifdef IEEE80211_SUPPORT_TDMA
464 case IEEE80211_M_AHDEMO:
465 if (flags & IEEE80211_CLONE_TDMA) {
466 /* NB: checked before clone operation allowed */
467 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
468 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
469 /*
470 * Propagate TDMA capability to mark vap; this
471 * cannot be removed and is used to distinguish
472 * regular ahdemo operation from ahdemo+tdma.
473 */
474 vap->iv_caps |= IEEE80211_C_TDMA;
475 }
476 break;
477#endif
478 default:
479 break;
480 }
481 /* auto-enable s/w beacon miss support */
482 if (flags & IEEE80211_CLONE_NOBEACONS)
483 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
484 /* auto-generated or user supplied MAC address */
485 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
486 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
487 /*
488 * Enable various functionality by default if we're
489 * capable; the driver can override us if it knows better.
490 */
491 if (vap->iv_caps & IEEE80211_C_WME)
492 vap->iv_flags |= IEEE80211_F_WME;
493 if (vap->iv_caps & IEEE80211_C_BURST)
494 vap->iv_flags |= IEEE80211_F_BURST;
495 /* NB: bg scanning only makes sense for station mode right now */
496 if (vap->iv_opmode == IEEE80211_M_STA &&
497 (vap->iv_caps & IEEE80211_C_BGSCAN))
498 vap->iv_flags |= IEEE80211_F_BGSCAN;
499 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
500 /* NB: DFS support only makes sense for ap mode right now */
501 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
502 (vap->iv_caps & IEEE80211_C_DFS))
503 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
504
505 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
506 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
507 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
508 /*
509 * Install a default reset method for the ioctl support;
510 * the driver can override this.
511 */
512 vap->iv_reset = default_reset;
513
514 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
515
516 ieee80211_sysctl_vattach(vap);
517 ieee80211_crypto_vattach(vap);
518 ieee80211_node_vattach(vap);
519 ieee80211_power_vattach(vap);
520 ieee80211_proto_vattach(vap);
521#ifdef IEEE80211_SUPPORT_SUPERG
522 ieee80211_superg_vattach(vap);
523#endif
524 ieee80211_ht_vattach(vap);
525 ieee80211_scan_vattach(vap);
526 ieee80211_regdomain_vattach(vap);
527 ieee80211_radiotap_vattach(vap);
528 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
529
530 return 0;
531}
532
533/*
534 * Activate a vap. State should have been prepared with a
535 * call to ieee80211_vap_setup and by the driver. On return
536 * from this call the vap is ready for use.
537 */
538int
539ieee80211_vap_attach(struct ieee80211vap *vap,
540 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
541{
542 struct ifnet *ifp = vap->iv_ifp;
543 struct ieee80211com *ic = vap->iv_ic;
544 struct ifmediareq imr;
545 int maxrate;
546
547 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
548 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
549 __func__, ieee80211_opmode_name[vap->iv_opmode],
550 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
551
552 /*
553 * Do late attach work that cannot happen until after
554 * the driver has had a chance to override defaults.
555 */
556 ieee80211_node_latevattach(vap);
557 ieee80211_power_latevattach(vap);
558
559 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
560 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
561 ieee80211_media_status(ifp, &imr);
562 /* NB: strip explicit mode; we're actually in autoselect */
563 ifmedia_set(&vap->iv_media,
564 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
565 if (maxrate)
566 ifp->if_baudrate = IF_Mbps(maxrate);
567
568 ether_ifattach(ifp, vap->iv_myaddr);
569 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
570 /* NB: disallow transmit */
571 ifp->if_transmit = null_transmit;
572 ifp->if_output = null_output;
573 } else {
574 /* hook output method setup by ether_ifattach */
575 vap->iv_output = ifp->if_output;
576 ifp->if_output = ieee80211_output;
577 }
578 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
579
580 IEEE80211_LOCK(ic);
581 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
582 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
583#ifdef IEEE80211_SUPPORT_SUPERG
584 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
585#endif
586 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
587 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
588 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
589 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
590 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
591 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
592 IEEE80211_UNLOCK(ic);
593
594 return 1;
595}
596
597/*
598 * Tear down vap state and reclaim the ifnet.
599 * The driver is assumed to have prepared for
600 * this; e.g. by turning off interrupts for the
601 * underlying device.
602 */
603void
604ieee80211_vap_detach(struct ieee80211vap *vap)
605{
606 struct ieee80211com *ic = vap->iv_ic;
607 struct ifnet *ifp = vap->iv_ifp;
608
609 CURVNET_SET(ifp->if_vnet);
610
611 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
612 __func__, ieee80211_opmode_name[vap->iv_opmode],
613 ic->ic_ifp->if_xname);
614
615 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
616 ether_ifdetach(ifp);
617
618 ieee80211_stop(vap);
619
620 /*
621 * Flush any deferred vap tasks.
622 */
623 ieee80211_draintask(ic, &vap->iv_nstate_task);
624 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
625
626 /* XXX band-aid until ifnet handles this for us */
627 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
628
629 IEEE80211_LOCK(ic);
630 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
631 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
632 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
633#ifdef IEEE80211_SUPPORT_SUPERG
634 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
635#endif
636 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
637 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
638 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
639 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
640 /* NB: this handles the bpfdetach done below */
641 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
642 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
643 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
644 IEEE80211_UNLOCK(ic);
645
646 ifmedia_removeall(&vap->iv_media);
647
648 ieee80211_radiotap_vdetach(vap);
649 ieee80211_regdomain_vdetach(vap);
650 ieee80211_scan_vdetach(vap);
651#ifdef IEEE80211_SUPPORT_SUPERG
652 ieee80211_superg_vdetach(vap);
653#endif
654 ieee80211_ht_vdetach(vap);
655 /* NB: must be before ieee80211_node_vdetach */
656 ieee80211_proto_vdetach(vap);
657 ieee80211_crypto_vdetach(vap);
658 ieee80211_power_vdetach(vap);
659 ieee80211_node_vdetach(vap);
660 ieee80211_sysctl_vdetach(vap);
661
662 if_free(ifp);
663
664 CURVNET_RESTORE();
665}
666
667/*
668 * Synchronize flag bit state in the parent ifnet structure
669 * according to the state of all vap ifnet's. This is used,
670 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
671 */
672void
673ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
674{
675 struct ifnet *ifp = ic->ic_ifp;
676 struct ieee80211vap *vap;
677 int bit, oflags;
678
679 IEEE80211_LOCK_ASSERT(ic);
680
681 bit = 0;
682 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
683 if (vap->iv_ifp->if_flags & flag) {
684 /*
685 * XXX the bridge sets PROMISC but we don't want to
686 * enable it on the device, discard here so all the
687 * drivers don't need to special-case it
688 */
689 if (flag == IFF_PROMISC &&
690 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
691 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
692 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
693 continue;
694 bit = 1;
695 break;
696 }
697 oflags = ifp->if_flags;
698 if (bit)
699 ifp->if_flags |= flag;
700 else
701 ifp->if_flags &= ~flag;
702 if ((ifp->if_flags ^ oflags) & flag) {
703 /* XXX should we return 1/0 and let caller do this? */
704 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
705 if (flag == IFF_PROMISC)
706 ieee80211_runtask(ic, &ic->ic_promisc_task);
707 else if (flag == IFF_ALLMULTI)
708 ieee80211_runtask(ic, &ic->ic_mcast_task);
709 }
710 }
711}
712
713/*
714 * Synchronize flag bit state in the com structure
715 * according to the state of all vap's. This is used,
716 * for example, to handle state changes via ioctls.
717 */
718static void
719ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
720{
721 struct ieee80211vap *vap;
722 int bit;
723
724 IEEE80211_LOCK_ASSERT(ic);
725
726 bit = 0;
727 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
728 if (vap->iv_flags & flag) {
729 bit = 1;
730 break;
731 }
732 if (bit)
733 ic->ic_flags |= flag;
734 else
735 ic->ic_flags &= ~flag;
736}
737
738void
739ieee80211_syncflag(struct ieee80211vap *vap, int flag)
740{
741 struct ieee80211com *ic = vap->iv_ic;
742
743 IEEE80211_LOCK(ic);
744 if (flag < 0) {
745 flag = -flag;
746 vap->iv_flags &= ~flag;
747 } else
748 vap->iv_flags |= flag;
749 ieee80211_syncflag_locked(ic, flag);
750 IEEE80211_UNLOCK(ic);
751}
752
753/*
754 * Synchronize flags_ht bit state in the com structure
755 * according to the state of all vap's. This is used,
756 * for example, to handle state changes via ioctls.
757 */
758static void
759ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
760{
761 struct ieee80211vap *vap;
762 int bit;
763
764 IEEE80211_LOCK_ASSERT(ic);
765
766 bit = 0;
767 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
768 if (vap->iv_flags_ht & flag) {
769 bit = 1;
770 break;
771 }
772 if (bit)
773 ic->ic_flags_ht |= flag;
774 else
775 ic->ic_flags_ht &= ~flag;
776}
777
778void
779ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
780{
781 struct ieee80211com *ic = vap->iv_ic;
782
783 IEEE80211_LOCK(ic);
784 if (flag < 0) {
785 flag = -flag;
786 vap->iv_flags_ht &= ~flag;
787 } else
788 vap->iv_flags_ht |= flag;
789 ieee80211_syncflag_ht_locked(ic, flag);
790 IEEE80211_UNLOCK(ic);
791}
792
793/*
794 * Synchronize flags_ext bit state in the com structure
795 * according to the state of all vap's. This is used,
796 * for example, to handle state changes via ioctls.
797 */
798static void
799ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
800{
801 struct ieee80211vap *vap;
802 int bit;
803
804 IEEE80211_LOCK_ASSERT(ic);
805
806 bit = 0;
807 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
808 if (vap->iv_flags_ext & flag) {
809 bit = 1;
810 break;
811 }
812 if (bit)
813 ic->ic_flags_ext |= flag;
814 else
815 ic->ic_flags_ext &= ~flag;
816}
817
818void
819ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
820{
821 struct ieee80211com *ic = vap->iv_ic;
822
823 IEEE80211_LOCK(ic);
824 if (flag < 0) {
825 flag = -flag;
826 vap->iv_flags_ext &= ~flag;
827 } else
828 vap->iv_flags_ext |= flag;
829 ieee80211_syncflag_ext_locked(ic, flag);
830 IEEE80211_UNLOCK(ic);
831}
832
833static __inline int
834mapgsm(u_int freq, u_int flags)
835{
836 freq *= 10;
837 if (flags & IEEE80211_CHAN_QUARTER)
838 freq += 5;
839 else if (flags & IEEE80211_CHAN_HALF)
840 freq += 10;
841 else
842 freq += 20;
843 /* NB: there is no 907/20 wide but leave room */
844 return (freq - 906*10) / 5;
845}
846
847static __inline int
848mappsb(u_int freq, u_int flags)
849{
850 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
851}
852
853/*
854 * Convert MHz frequency to IEEE channel number.
855 */
856int
857ieee80211_mhz2ieee(u_int freq, u_int flags)
858{
859#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
860 if (flags & IEEE80211_CHAN_GSM)
861 return mapgsm(freq, flags);
862 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
863 if (freq == 2484)
864 return 14;
865 if (freq < 2484)
866 return ((int) freq - 2407) / 5;
867 else
868 return 15 + ((freq - 2512) / 20);
869 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
870 if (freq <= 5000) {
871 /* XXX check regdomain? */
872 if (IS_FREQ_IN_PSB(freq))
873 return mappsb(freq, flags);
874 return (freq - 4000) / 5;
875 } else
876 return (freq - 5000) / 5;
877 } else { /* either, guess */
878 if (freq == 2484)
879 return 14;
880 if (freq < 2484) {
881 if (907 <= freq && freq <= 922)
882 return mapgsm(freq, flags);
883 return ((int) freq - 2407) / 5;
884 }
885 if (freq < 5000) {
886 if (IS_FREQ_IN_PSB(freq))
887 return mappsb(freq, flags);
888 else if (freq > 4900)
889 return (freq - 4000) / 5;
890 else
891 return 15 + ((freq - 2512) / 20);
892 }
893 return (freq - 5000) / 5;
894 }
895#undef IS_FREQ_IN_PSB
896}
897
898/*
899 * Convert channel to IEEE channel number.
900 */
901int
902ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
903{
904 if (c == NULL) {
905 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
906 return 0; /* XXX */
907 }
908 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
909}
910
911/*
912 * Convert IEEE channel number to MHz frequency.
913 */
914u_int
915ieee80211_ieee2mhz(u_int chan, u_int flags)
916{
917 if (flags & IEEE80211_CHAN_GSM)
918 return 907 + 5 * (chan / 10);
919 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
920 if (chan == 14)
921 return 2484;
922 if (chan < 14)
923 return 2407 + chan*5;
924 else
925 return 2512 + ((chan-15)*20);
926 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
927 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
928 chan -= 37;
929 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
930 }
931 return 5000 + (chan*5);
932 } else { /* either, guess */
933 /* XXX can't distinguish PSB+GSM channels */
934 if (chan == 14)
935 return 2484;
936 if (chan < 14) /* 0-13 */
937 return 2407 + chan*5;
938 if (chan < 27) /* 15-26 */
939 return 2512 + ((chan-15)*20);
940 return 5000 + (chan*5);
941 }
942}
943
944/*
945 * Locate a channel given a frequency+flags. We cache
946 * the previous lookup to optimize switching between two
947 * channels--as happens with dynamic turbo.
948 */
949struct ieee80211_channel *
950ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
951{
952 struct ieee80211_channel *c;
953 int i;
954
955 flags &= IEEE80211_CHAN_ALLTURBO;
956 c = ic->ic_prevchan;
957 if (c != NULL && c->ic_freq == freq &&
958 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
959 return c;
960 /* brute force search */
961 for (i = 0; i < ic->ic_nchans; i++) {
962 c = &ic->ic_channels[i];
963 if (c->ic_freq == freq &&
964 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
965 return c;
966 }
967 return NULL;
968}
969
970/*
971 * Locate a channel given a channel number+flags. We cache
972 * the previous lookup to optimize switching between two
973 * channels--as happens with dynamic turbo.
974 */
975struct ieee80211_channel *
976ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
977{
978 struct ieee80211_channel *c;
979 int i;
980
981 flags &= IEEE80211_CHAN_ALLTURBO;
982 c = ic->ic_prevchan;
983 if (c != NULL && c->ic_ieee == ieee &&
984 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
985 return c;
986 /* brute force search */
987 for (i = 0; i < ic->ic_nchans; i++) {
988 c = &ic->ic_channels[i];
989 if (c->ic_ieee == ieee &&
990 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
991 return c;
992 }
993 return NULL;
994}
995
996static void
997addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
998{
999#define ADD(_ic, _s, _o) \
1000 ifmedia_add(media, \
1001 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1002 static const u_int mopts[IEEE80211_MODE_MAX] = {
1003 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1004 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1005 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1006 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1007 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1008 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1009 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1010 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1011 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1012 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1013 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1014 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1015 };
1016 u_int mopt;
1017
1018 mopt = mopts[mode];
1019 if (addsta)
1020 ADD(ic, mword, mopt); /* STA mode has no cap */
1021 if (caps & IEEE80211_C_IBSS)
1022 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1023 if (caps & IEEE80211_C_HOSTAP)
1024 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1025 if (caps & IEEE80211_C_AHDEMO)
1026 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1027 if (caps & IEEE80211_C_MONITOR)
1028 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1029 if (caps & IEEE80211_C_WDS)
1030 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1031 if (caps & IEEE80211_C_MBSS)
1032 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1033#undef ADD
1034}
1035
1036/*
1037 * Setup the media data structures according to the channel and
1038 * rate tables.
1039 */
1040static int
1041ieee80211_media_setup(struct ieee80211com *ic,
1042 struct ifmedia *media, int caps, int addsta,
1043 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1044{
1045 int i, j, rate, maxrate, mword, r;
1046 enum ieee80211_phymode mode;
1047 const struct ieee80211_rateset *rs;
1048 struct ieee80211_rateset allrates;
1049
1050 /*
1051 * Fill in media characteristics.
1052 */
1053 ifmedia_init(media, 0, media_change, media_stat);
1054 maxrate = 0;
1055 /*
1056 * Add media for legacy operating modes.
1057 */
1058 memset(&allrates, 0, sizeof(allrates));
1059 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1060 if (isclr(ic->ic_modecaps, mode))
1061 continue;
1062 addmedia(media, caps, addsta, mode, IFM_AUTO);
1063 if (mode == IEEE80211_MODE_AUTO)
1064 continue;
1065 rs = &ic->ic_sup_rates[mode];
1066 for (i = 0; i < rs->rs_nrates; i++) {
1067 rate = rs->rs_rates[i];
1068 mword = ieee80211_rate2media(ic, rate, mode);
1069 if (mword == 0)
1070 continue;
1071 addmedia(media, caps, addsta, mode, mword);
1072 /*
1073 * Add legacy rate to the collection of all rates.
1074 */
1075 r = rate & IEEE80211_RATE_VAL;
1076 for (j = 0; j < allrates.rs_nrates; j++)
1077 if (allrates.rs_rates[j] == r)
1078 break;
1079 if (j == allrates.rs_nrates) {
1080 /* unique, add to the set */
1081 allrates.rs_rates[j] = r;
1082 allrates.rs_nrates++;
1083 }
1084 rate = (rate & IEEE80211_RATE_VAL) / 2;
1085 if (rate > maxrate)
1086 maxrate = rate;
1087 }
1088 }
1089 for (i = 0; i < allrates.rs_nrates; i++) {
1090 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1091 IEEE80211_MODE_AUTO);
1092 if (mword == 0)
1093 continue;
1094 /* NB: remove media options from mword */
1095 addmedia(media, caps, addsta,
1096 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1097 }
1098 /*
1099 * Add HT/11n media. Note that we do not have enough
1100 * bits in the media subtype to express the MCS so we
1101 * use a "placeholder" media subtype and any fixed MCS
1102 * must be specified with a different mechanism.
1103 */
1104 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1105 if (isclr(ic->ic_modecaps, mode))
1106 continue;
1107 addmedia(media, caps, addsta, mode, IFM_AUTO);
1108 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1109 }
1110 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1111 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1112 addmedia(media, caps, addsta,
1113 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1114 i = ic->ic_txstream * 8 - 1;
1115 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1116 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1117 rate = ieee80211_htrates[i].ht40_rate_400ns;
1118 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1119 rate = ieee80211_htrates[i].ht40_rate_800ns;
1120 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1121 rate = ieee80211_htrates[i].ht20_rate_400ns;
1122 else
1123 rate = ieee80211_htrates[i].ht20_rate_800ns;
1124 if (rate > maxrate)
1125 maxrate = rate;
1126 }
1127 return maxrate;
1128}
1129
1130void
1131ieee80211_media_init(struct ieee80211com *ic)
1132{
1133 struct ifnet *ifp = ic->ic_ifp;
1134 int maxrate;
1135
1136 /* NB: this works because the structure is initialized to zero */
1137 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1138 /*
1139 * We are re-initializing the channel list; clear
1140 * the existing media state as the media routines
1141 * don't suppress duplicates.
1142 */
1143 ifmedia_removeall(&ic->ic_media);
1144 }
1145 ieee80211_chan_init(ic);
1146
1147 /*
1148 * Recalculate media settings in case new channel list changes
1149 * the set of available modes.
1150 */
1151 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1152 ieee80211com_media_change, ieee80211com_media_status);
1153 /* NB: strip explicit mode; we're actually in autoselect */
1154 ifmedia_set(&ic->ic_media,
1155 media_status(ic->ic_opmode, ic->ic_curchan) &~
1156 (IFM_MMASK | IFM_IEEE80211_TURBO));
1157 if (maxrate)
1158 ifp->if_baudrate = IF_Mbps(maxrate);
1159
1160 /* XXX need to propagate new media settings to vap's */
1161}
1162
1163/* XXX inline or eliminate? */
1164const struct ieee80211_rateset *
1165ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1166{
1167 /* XXX does this work for 11ng basic rates? */
1168 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1169}
1170
1171void
1172ieee80211_announce(struct ieee80211com *ic)
1173{
1174 struct ifnet *ifp = ic->ic_ifp;
1175 int i, rate, mword;
1176 enum ieee80211_phymode mode;
1177 const struct ieee80211_rateset *rs;
1178
1179 /* NB: skip AUTO since it has no rates */
1180 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1181 if (isclr(ic->ic_modecaps, mode))
1182 continue;
1183 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1184 rs = &ic->ic_sup_rates[mode];
1185 for (i = 0; i < rs->rs_nrates; i++) {
1186 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1187 if (mword == 0)
1188 continue;
1189 rate = ieee80211_media2rate(mword);
1190 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1191 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1192 }
1193 printf("\n");
1194 }
1195 ieee80211_ht_announce(ic);
1196}
1197
1198void
1199ieee80211_announce_channels(struct ieee80211com *ic)
1200{
1201 const struct ieee80211_channel *c;
1202 char type;
1203 int i, cw;
1204
1205 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1206 for (i = 0; i < ic->ic_nchans; i++) {
1207 c = &ic->ic_channels[i];
1208 if (IEEE80211_IS_CHAN_ST(c))
1209 type = 'S';
1210 else if (IEEE80211_IS_CHAN_108A(c))
1211 type = 'T';
1212 else if (IEEE80211_IS_CHAN_108G(c))
1213 type = 'G';
1214 else if (IEEE80211_IS_CHAN_HT(c))
1215 type = 'n';
1216 else if (IEEE80211_IS_CHAN_A(c))
1217 type = 'a';
1218 else if (IEEE80211_IS_CHAN_ANYG(c))
1219 type = 'g';
1220 else if (IEEE80211_IS_CHAN_B(c))
1221 type = 'b';
1222 else
1223 type = 'f';
1224 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1225 cw = 40;
1226 else if (IEEE80211_IS_CHAN_HALF(c))
1227 cw = 10;
1228 else if (IEEE80211_IS_CHAN_QUARTER(c))
1229 cw = 5;
1230 else
1231 cw = 20;
1232 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1233 , c->ic_ieee, c->ic_freq, type
1234 , cw
1235 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1236 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1237 , c->ic_maxregpower
1238 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1239 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1240 );
1241 }
1242}
1243
1244static int
1245media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1246{
1247 switch (IFM_MODE(ime->ifm_media)) {
1248 case IFM_IEEE80211_11A:
1249 *mode = IEEE80211_MODE_11A;
1250 break;
1251 case IFM_IEEE80211_11B:
1252 *mode = IEEE80211_MODE_11B;
1253 break;
1254 case IFM_IEEE80211_11G:
1255 *mode = IEEE80211_MODE_11G;
1256 break;
1257 case IFM_IEEE80211_FH:
1258 *mode = IEEE80211_MODE_FH;
1259 break;
1260 case IFM_IEEE80211_11NA:
1261 *mode = IEEE80211_MODE_11NA;
1262 break;
1263 case IFM_IEEE80211_11NG:
1264 *mode = IEEE80211_MODE_11NG;
1265 break;
1266 case IFM_AUTO:
1267 *mode = IEEE80211_MODE_AUTO;
1268 break;
1269 default:
1270 return 0;
1271 }
1272 /*
1273 * Turbo mode is an ``option''.
1274 * XXX does not apply to AUTO
1275 */
1276 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1277 if (*mode == IEEE80211_MODE_11A) {
1278 if (flags & IEEE80211_F_TURBOP)
1279 *mode = IEEE80211_MODE_TURBO_A;
1280 else
1281 *mode = IEEE80211_MODE_STURBO_A;
1282 } else if (*mode == IEEE80211_MODE_11G)
1283 *mode = IEEE80211_MODE_TURBO_G;
1284 else
1285 return 0;
1286 }
1287 /* XXX HT40 +/- */
1288 return 1;
1289}
1290
1291/*
1292 * Handle a media change request on the underlying interface.
1293 */
1294int
1295ieee80211com_media_change(struct ifnet *ifp)
1296{
1297 return EINVAL;
1298}
1299
1300/*
1301 * Handle a media change request on the vap interface.
1302 */
1303int
1304ieee80211_media_change(struct ifnet *ifp)
1305{
1306 struct ieee80211vap *vap = ifp->if_softc;
1307 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1308 uint16_t newmode;
1309
1310 if (!media2mode(ime, vap->iv_flags, &newmode))
1311 return EINVAL;
1312 if (vap->iv_des_mode != newmode) {
1313 vap->iv_des_mode = newmode;
1314 /* XXX kick state machine if up+running */
1315 }
1316 return 0;
1317}
1318
1319/*
1320 * Common code to calculate the media status word
1321 * from the operating mode and channel state.
1322 */
1323static int
1324media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1325{
1326 int status;
1327
1328 status = IFM_IEEE80211;
1329 switch (opmode) {
1330 case IEEE80211_M_STA:
1331 break;
1332 case IEEE80211_M_IBSS:
1333 status |= IFM_IEEE80211_ADHOC;
1334 break;
1335 case IEEE80211_M_HOSTAP:
1336 status |= IFM_IEEE80211_HOSTAP;
1337 break;
1338 case IEEE80211_M_MONITOR:
1339 status |= IFM_IEEE80211_MONITOR;
1340 break;
1341 case IEEE80211_M_AHDEMO:
1342 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1343 break;
1344 case IEEE80211_M_WDS:
1345 status |= IFM_IEEE80211_WDS;
1346 break;
1347 case IEEE80211_M_MBSS:
1348 status |= IFM_IEEE80211_MBSS;
1349 break;
1350 }
1351 if (IEEE80211_IS_CHAN_HTA(chan)) {
1352 status |= IFM_IEEE80211_11NA;
1353 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1354 status |= IFM_IEEE80211_11NG;
1355 } else if (IEEE80211_IS_CHAN_A(chan)) {
1356 status |= IFM_IEEE80211_11A;
1357 } else if (IEEE80211_IS_CHAN_B(chan)) {
1358 status |= IFM_IEEE80211_11B;
1359 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1360 status |= IFM_IEEE80211_11G;
1361 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1362 status |= IFM_IEEE80211_FH;
1363 }
1364 /* XXX else complain? */
1365
1366 if (IEEE80211_IS_CHAN_TURBO(chan))
1367 status |= IFM_IEEE80211_TURBO;
1368#if 0
1369 if (IEEE80211_IS_CHAN_HT20(chan))
1370 status |= IFM_IEEE80211_HT20;
1371 if (IEEE80211_IS_CHAN_HT40(chan))
1372 status |= IFM_IEEE80211_HT40;
1373#endif
1374 return status;
1375}
1376
1377static void
1378ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1379{
1380 struct ieee80211com *ic = ifp->if_l2com;
1381 struct ieee80211vap *vap;
1382
1383 imr->ifm_status = IFM_AVALID;
1384 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1385 if (vap->iv_ifp->if_flags & IFF_UP) {
1386 imr->ifm_status |= IFM_ACTIVE;
1387 break;
1388 }
1389 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1390 if (imr->ifm_status & IFM_ACTIVE)
1391 imr->ifm_current = imr->ifm_active;
1392}
1393
1394void
1395ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1396{
1397 struct ieee80211vap *vap = ifp->if_softc;
1398 struct ieee80211com *ic = vap->iv_ic;
1399 enum ieee80211_phymode mode;
1400
1401 imr->ifm_status = IFM_AVALID;
1402 /*
1403 * NB: use the current channel's mode to lock down a xmit
1404 * rate only when running; otherwise we may have a mismatch
1405 * in which case the rate will not be convertible.
1406 */
1407 if (vap->iv_state == IEEE80211_S_RUN) {
1408 imr->ifm_status |= IFM_ACTIVE;
1409 mode = ieee80211_chan2mode(ic->ic_curchan);
1410 } else
1411 mode = IEEE80211_MODE_AUTO;
1412 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1413 /*
1414 * Calculate a current rate if possible.
1415 */
1416 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1417 /*
1418 * A fixed rate is set, report that.
1419 */
1420 imr->ifm_active |= ieee80211_rate2media(ic,
1421 vap->iv_txparms[mode].ucastrate, mode);
1422 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1423 /*
1424 * In station mode report the current transmit rate.
1425 */
1426 imr->ifm_active |= ieee80211_rate2media(ic,
1427 vap->iv_bss->ni_txrate, mode);
1428 } else
1429 imr->ifm_active |= IFM_AUTO;
1430 if (imr->ifm_status & IFM_ACTIVE)
1431 imr->ifm_current = imr->ifm_active;
1432}
1433
1434/*
1435 * Set the current phy mode and recalculate the active channel
1436 * set based on the available channels for this mode. Also
1437 * select a new default/current channel if the current one is
1438 * inappropriate for this mode.
1439 */
1440int
1441ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1442{
1443 /*
1444 * Adjust basic rates in 11b/11g supported rate set.
1445 * Note that if operating on a hal/quarter rate channel
1446 * this is a noop as those rates sets are different
1447 * and used instead.
1448 */
1449 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1450 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1451
1452 ic->ic_curmode = mode;
1453 ieee80211_reset_erp(ic); /* reset ERP state */
1454
1455 return 0;
1456}
1457
1458/*
1459 * Return the phy mode for with the specified channel.
1460 */
1461enum ieee80211_phymode
1462ieee80211_chan2mode(const struct ieee80211_channel *chan)
1463{
1464
1465 if (IEEE80211_IS_CHAN_HTA(chan))
1466 return IEEE80211_MODE_11NA;
1467 else if (IEEE80211_IS_CHAN_HTG(chan))
1468 return IEEE80211_MODE_11NG;
1469 else if (IEEE80211_IS_CHAN_108G(chan))
1470 return IEEE80211_MODE_TURBO_G;
1471 else if (IEEE80211_IS_CHAN_ST(chan))
1472 return IEEE80211_MODE_STURBO_A;
1473 else if (IEEE80211_IS_CHAN_TURBO(chan))
1474 return IEEE80211_MODE_TURBO_A;
1475 else if (IEEE80211_IS_CHAN_HALF(chan))
1476 return IEEE80211_MODE_HALF;
1477 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1478 return IEEE80211_MODE_QUARTER;
1479 else if (IEEE80211_IS_CHAN_A(chan))
1480 return IEEE80211_MODE_11A;
1481 else if (IEEE80211_IS_CHAN_ANYG(chan))
1482 return IEEE80211_MODE_11G;
1483 else if (IEEE80211_IS_CHAN_B(chan))
1484 return IEEE80211_MODE_11B;
1485 else if (IEEE80211_IS_CHAN_FHSS(chan))
1486 return IEEE80211_MODE_FH;
1487
1488 /* NB: should not get here */
1489 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1490 __func__, chan->ic_freq, chan->ic_flags);
1491 return IEEE80211_MODE_11B;
1492}
1493
1494struct ratemedia {
1495 u_int match; /* rate + mode */
1496 u_int media; /* if_media rate */
1497};
1498
1499static int
1500findmedia(const struct ratemedia rates[], int n, u_int match)
1501{
1502 int i;
1503
1504 for (i = 0; i < n; i++)
1505 if (rates[i].match == match)
1506 return rates[i].media;
1507 return IFM_AUTO;
1508}
1509
1510/*
1511 * Convert IEEE80211 rate value to ifmedia subtype.
1512 * Rate is either a legacy rate in units of 0.5Mbps
1513 * or an MCS index.
1514 */
1515int
1516ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1517{
1518#define N(a) (sizeof(a) / sizeof(a[0]))
1519 static const struct ratemedia rates[] = {
1520 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1521 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1522 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1523 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1524 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1525 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1526 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1527 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1528 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1529 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1530 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1531 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1532 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1533 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1534 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1535 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1536 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1537 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1538 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1539 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1540 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1541 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1542 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1543 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1544 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1545 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1546 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1547 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1548 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1549 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1550 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1551 };
1552 static const struct ratemedia htrates[] = {
1553 { 0, IFM_IEEE80211_MCS },
1554 { 1, IFM_IEEE80211_MCS },
1555 { 2, IFM_IEEE80211_MCS },
1556 { 3, IFM_IEEE80211_MCS },
1557 { 4, IFM_IEEE80211_MCS },
1558 { 5, IFM_IEEE80211_MCS },
1559 { 6, IFM_IEEE80211_MCS },
1560 { 7, IFM_IEEE80211_MCS },
1561 { 8, IFM_IEEE80211_MCS },
1562 { 9, IFM_IEEE80211_MCS },
1563 { 10, IFM_IEEE80211_MCS },
1564 { 11, IFM_IEEE80211_MCS },
1565 { 12, IFM_IEEE80211_MCS },
1566 { 13, IFM_IEEE80211_MCS },
1567 { 14, IFM_IEEE80211_MCS },
1568 { 15, IFM_IEEE80211_MCS },
1569 { 16, IFM_IEEE80211_MCS },
1570 { 17, IFM_IEEE80211_MCS },
1571 { 18, IFM_IEEE80211_MCS },
1572 { 19, IFM_IEEE80211_MCS },
1573 { 20, IFM_IEEE80211_MCS },
1574 { 21, IFM_IEEE80211_MCS },
1575 { 22, IFM_IEEE80211_MCS },
1576 { 23, IFM_IEEE80211_MCS },
1577 { 24, IFM_IEEE80211_MCS },
1578 { 25, IFM_IEEE80211_MCS },
1579 { 26, IFM_IEEE80211_MCS },
1580 { 27, IFM_IEEE80211_MCS },
1581 { 28, IFM_IEEE80211_MCS },
1582 { 29, IFM_IEEE80211_MCS },
1583 { 30, IFM_IEEE80211_MCS },
1584 { 31, IFM_IEEE80211_MCS },
1585 { 32, IFM_IEEE80211_MCS },
1586 { 33, IFM_IEEE80211_MCS },
1587 { 34, IFM_IEEE80211_MCS },
1588 { 35, IFM_IEEE80211_MCS },
1589 { 36, IFM_IEEE80211_MCS },
1590 { 37, IFM_IEEE80211_MCS },
1591 { 38, IFM_IEEE80211_MCS },
1592 { 39, IFM_IEEE80211_MCS },
1593 { 40, IFM_IEEE80211_MCS },
1594 { 41, IFM_IEEE80211_MCS },
1595 { 42, IFM_IEEE80211_MCS },
1596 { 43, IFM_IEEE80211_MCS },
1597 { 44, IFM_IEEE80211_MCS },
1598 { 45, IFM_IEEE80211_MCS },
1599 { 46, IFM_IEEE80211_MCS },
1600 { 47, IFM_IEEE80211_MCS },
1601 { 48, IFM_IEEE80211_MCS },
1602 { 49, IFM_IEEE80211_MCS },
1603 { 50, IFM_IEEE80211_MCS },
1604 { 51, IFM_IEEE80211_MCS },
1605 { 52, IFM_IEEE80211_MCS },
1606 { 53, IFM_IEEE80211_MCS },
1607 { 54, IFM_IEEE80211_MCS },
1608 { 55, IFM_IEEE80211_MCS },
1609 { 56, IFM_IEEE80211_MCS },
1610 { 57, IFM_IEEE80211_MCS },
1611 { 58, IFM_IEEE80211_MCS },
1612 { 59, IFM_IEEE80211_MCS },
1613 { 60, IFM_IEEE80211_MCS },
1614 { 61, IFM_IEEE80211_MCS },
1615 { 62, IFM_IEEE80211_MCS },
1616 { 63, IFM_IEEE80211_MCS },
1617 { 64, IFM_IEEE80211_MCS },
1618 { 65, IFM_IEEE80211_MCS },
1619 { 66, IFM_IEEE80211_MCS },
1620 { 67, IFM_IEEE80211_MCS },
1621 { 68, IFM_IEEE80211_MCS },
1622 { 69, IFM_IEEE80211_MCS },
1623 { 70, IFM_IEEE80211_MCS },
1624 { 71, IFM_IEEE80211_MCS },
1625 { 72, IFM_IEEE80211_MCS },
1626 { 73, IFM_IEEE80211_MCS },
1627 { 74, IFM_IEEE80211_MCS },
1628 { 75, IFM_IEEE80211_MCS },
1629 { 76, IFM_IEEE80211_MCS },
1630 };
1631 int m;
1632
1633 /*
1634 * Check 11n rates first for match as an MCS.
1635 */
1636 if (mode == IEEE80211_MODE_11NA) {
1637 if (rate & IEEE80211_RATE_MCS) {
1638 rate &= ~IEEE80211_RATE_MCS;
1639 m = findmedia(htrates, N(htrates), rate);
1640 if (m != IFM_AUTO)
1641 return m | IFM_IEEE80211_11NA;
1642 }
1643 } else if (mode == IEEE80211_MODE_11NG) {
1644 /* NB: 12 is ambiguous, it will be treated as an MCS */
1645 if (rate & IEEE80211_RATE_MCS) {
1646 rate &= ~IEEE80211_RATE_MCS;
1647 m = findmedia(htrates, N(htrates), rate);
1648 if (m != IFM_AUTO)
1649 return m | IFM_IEEE80211_11NG;
1650 }
1651 }
1652 rate &= IEEE80211_RATE_VAL;
1653 switch (mode) {
1654 case IEEE80211_MODE_11A:
1655 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1656 case IEEE80211_MODE_QUARTER:
1657 case IEEE80211_MODE_11NA:
1658 case IEEE80211_MODE_TURBO_A:
1659 case IEEE80211_MODE_STURBO_A:
1660 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1661 case IEEE80211_MODE_11B:
1662 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1663 case IEEE80211_MODE_FH:
1664 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1665 case IEEE80211_MODE_AUTO:
1666 /* NB: ic may be NULL for some drivers */
1667 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1668 return findmedia(rates, N(rates),
1669 rate | IFM_IEEE80211_FH);
1670 /* NB: hack, 11g matches both 11b+11a rates */
1671 /* fall thru... */
1672 case IEEE80211_MODE_11G:
1673 case IEEE80211_MODE_11NG:
1674 case IEEE80211_MODE_TURBO_G:
1675 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1676 }
1677 return IFM_AUTO;
1678#undef N
1679}
1680
1681int
1682ieee80211_media2rate(int mword)
1683{
1684#define N(a) (sizeof(a) / sizeof(a[0]))
1685 static const int ieeerates[] = {
1686 -1, /* IFM_AUTO */
1687 0, /* IFM_MANUAL */
1688 0, /* IFM_NONE */
1689 2, /* IFM_IEEE80211_FH1 */
1690 4, /* IFM_IEEE80211_FH2 */
1691 2, /* IFM_IEEE80211_DS1 */
1692 4, /* IFM_IEEE80211_DS2 */
1693 11, /* IFM_IEEE80211_DS5 */
1694 22, /* IFM_IEEE80211_DS11 */
1695 44, /* IFM_IEEE80211_DS22 */
1696 12, /* IFM_IEEE80211_OFDM6 */
1697 18, /* IFM_IEEE80211_OFDM9 */
1698 24, /* IFM_IEEE80211_OFDM12 */
1699 36, /* IFM_IEEE80211_OFDM18 */
1700 48, /* IFM_IEEE80211_OFDM24 */
1701 72, /* IFM_IEEE80211_OFDM36 */
1702 96, /* IFM_IEEE80211_OFDM48 */
1703 108, /* IFM_IEEE80211_OFDM54 */
1704 144, /* IFM_IEEE80211_OFDM72 */
1705 0, /* IFM_IEEE80211_DS354k */
1706 0, /* IFM_IEEE80211_DS512k */
1707 6, /* IFM_IEEE80211_OFDM3 */
1708 9, /* IFM_IEEE80211_OFDM4 */
1709 54, /* IFM_IEEE80211_OFDM27 */
1710 -1, /* IFM_IEEE80211_MCS */
1711 };
1712 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1713 ieeerates[IFM_SUBTYPE(mword)] : 0;
1714#undef N
1715}
1716
1717/*
1718 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1719 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1720 */
1721#define mix(a, b, c) \
1722do { \
1723 a -= b; a -= c; a ^= (c >> 13); \
1724 b -= c; b -= a; b ^= (a << 8); \
1725 c -= a; c -= b; c ^= (b >> 13); \
1726 a -= b; a -= c; a ^= (c >> 12); \
1727 b -= c; b -= a; b ^= (a << 16); \
1728 c -= a; c -= b; c ^= (b >> 5); \
1729 a -= b; a -= c; a ^= (c >> 3); \
1730 b -= c; b -= a; b ^= (a << 10); \
1731 c -= a; c -= b; c ^= (b >> 15); \
1732} while (/*CONSTCOND*/0)
1733
1734uint32_t
1735ieee80211_mac_hash(const struct ieee80211com *ic,
1736 const uint8_t addr[IEEE80211_ADDR_LEN])
1737{
1738 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
1739
1740 b += addr[5] << 8;
1741 b += addr[4];
1742 a += addr[3] << 24;
1743 a += addr[2] << 16;
1744 a += addr[1] << 8;
1745 a += addr[0];
1746
1747 mix(a, b, c);
1748
1749 return c;
1750}
1751#undef mix
| 247{
248 if_printf(ifp, "discard raw packet\n");
249 return null_transmit(ifp, m);
250}
251
252static void
253null_input(struct ifnet *ifp, struct mbuf *m)
254{
255 if_printf(ifp, "if_input should not be called\n");
256 m_freem(m);
257}
258
259static void
260null_update_chw(struct ieee80211com *ic)
261{
262
263 if_printf(ic->ic_ifp, "%s: need callback\n", __func__);
264}
265
266/*
267 * Attach/setup the common net80211 state. Called by
268 * the driver on attach to prior to creating any vap's.
269 */
270void
271ieee80211_ifattach(struct ieee80211com *ic,
272 const uint8_t macaddr[IEEE80211_ADDR_LEN])
273{
274 struct ifnet *ifp = ic->ic_ifp;
275 struct sockaddr_dl *sdl;
276 struct ifaddr *ifa;
277
278 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
279
280 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
281 IEEE80211_TX_LOCK_INIT(ic, ifp->if_xname);
282 TAILQ_INIT(&ic->ic_vaps);
283
284 /* Create a taskqueue for all state changes */
285 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
286 taskqueue_thread_enqueue, &ic->ic_tq);
287 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
288 ifp->if_xname);
289 /*
290 * Fill in 802.11 available channel set, mark all
291 * available channels as active, and pick a default
292 * channel if not already specified.
293 */
294 ieee80211_media_init(ic);
295
296 ic->ic_update_mcast = null_update_mcast;
297 ic->ic_update_promisc = null_update_promisc;
298 ic->ic_update_chw = null_update_chw;
299
300 ic->ic_hash_key = arc4random();
301 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
302 ic->ic_lintval = ic->ic_bintval;
303 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
304
305 ieee80211_crypto_attach(ic);
306 ieee80211_node_attach(ic);
307 ieee80211_power_attach(ic);
308 ieee80211_proto_attach(ic);
309#ifdef IEEE80211_SUPPORT_SUPERG
310 ieee80211_superg_attach(ic);
311#endif
312 ieee80211_ht_attach(ic);
313 ieee80211_scan_attach(ic);
314 ieee80211_regdomain_attach(ic);
315 ieee80211_dfs_attach(ic);
316
317 ieee80211_sysctl_attach(ic);
318
319 ifp->if_addrlen = IEEE80211_ADDR_LEN;
320 ifp->if_hdrlen = 0;
321
322 CURVNET_SET(vnet0);
323
324 if_attach(ifp);
325
326 ifp->if_mtu = IEEE80211_MTU_MAX;
327 ifp->if_broadcastaddr = ieee80211broadcastaddr;
328 ifp->if_output = null_output;
329 ifp->if_input = null_input; /* just in case */
330 ifp->if_resolvemulti = NULL; /* NB: callers check */
331
332 ifa = ifaddr_byindex(ifp->if_index);
333 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
334 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
335 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
336 sdl->sdl_alen = IEEE80211_ADDR_LEN;
337 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
338 ifa_free(ifa);
339
340 CURVNET_RESTORE();
341}
342
343/*
344 * Detach net80211 state on device detach. Tear down
345 * all vap's and reclaim all common state prior to the
346 * device state going away. Note we may call back into
347 * driver; it must be prepared for this.
348 */
349void
350ieee80211_ifdetach(struct ieee80211com *ic)
351{
352 struct ifnet *ifp = ic->ic_ifp;
353 struct ieee80211vap *vap;
354
355 /*
356 * This detaches the main interface, but not the vaps.
357 * Each VAP may be in a separate VIMAGE.
358 */
359 CURVNET_SET(ifp->if_vnet);
360 if_detach(ifp);
361 CURVNET_RESTORE();
362
363 /*
364 * The VAP is responsible for setting and clearing
365 * the VIMAGE context.
366 */
367 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
368 ieee80211_vap_destroy(vap);
369 ieee80211_waitfor_parent(ic);
370
371 ieee80211_sysctl_detach(ic);
372 ieee80211_dfs_detach(ic);
373 ieee80211_regdomain_detach(ic);
374 ieee80211_scan_detach(ic);
375#ifdef IEEE80211_SUPPORT_SUPERG
376 ieee80211_superg_detach(ic);
377#endif
378 ieee80211_ht_detach(ic);
379 /* NB: must be called before ieee80211_node_detach */
380 ieee80211_proto_detach(ic);
381 ieee80211_crypto_detach(ic);
382 ieee80211_power_detach(ic);
383 ieee80211_node_detach(ic);
384
385 /* XXX VNET needed? */
386 ifmedia_removeall(&ic->ic_media);
387
388 taskqueue_free(ic->ic_tq);
389 IEEE80211_TX_LOCK_DESTROY(ic);
390 IEEE80211_LOCK_DESTROY(ic);
391}
392
393/*
394 * Default reset method for use with the ioctl support. This
395 * method is invoked after any state change in the 802.11
396 * layer that should be propagated to the hardware but not
397 * require re-initialization of the 802.11 state machine (e.g
398 * rescanning for an ap). We always return ENETRESET which
399 * should cause the driver to re-initialize the device. Drivers
400 * can override this method to implement more optimized support.
401 */
402static int
403default_reset(struct ieee80211vap *vap, u_long cmd)
404{
405 return ENETRESET;
406}
407
408/*
409 * Prepare a vap for use. Drivers use this call to
410 * setup net80211 state in new vap's prior attaching
411 * them with ieee80211_vap_attach (below).
412 */
413int
414ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
415 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
416 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN],
417 const uint8_t macaddr[IEEE80211_ADDR_LEN])
418{
419 struct ifnet *ifp;
420
421 ifp = if_alloc(IFT_ETHER);
422 if (ifp == NULL) {
423 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
424 __func__);
425 return ENOMEM;
426 }
427 if_initname(ifp, name, unit);
428 ifp->if_softc = vap; /* back pointer */
429 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
430 ifp->if_start = ieee80211_start;
431 ifp->if_ioctl = ieee80211_ioctl;
432 ifp->if_init = ieee80211_init;
433 /* NB: input+output filled in by ether_ifattach */
434 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
435 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
436 IFQ_SET_READY(&ifp->if_snd);
437
438 vap->iv_ifp = ifp;
439 vap->iv_ic = ic;
440 vap->iv_flags = ic->ic_flags; /* propagate common flags */
441 vap->iv_flags_ext = ic->ic_flags_ext;
442 vap->iv_flags_ven = ic->ic_flags_ven;
443 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
444 vap->iv_htcaps = ic->ic_htcaps;
445 vap->iv_htextcaps = ic->ic_htextcaps;
446 vap->iv_opmode = opmode;
447 vap->iv_caps |= ieee80211_opcap[opmode];
448 switch (opmode) {
449 case IEEE80211_M_WDS:
450 /*
451 * WDS links must specify the bssid of the far end.
452 * For legacy operation this is a static relationship.
453 * For non-legacy operation the station must associate
454 * and be authorized to pass traffic. Plumbing the
455 * vap to the proper node happens when the vap
456 * transitions to RUN state.
457 */
458 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
459 vap->iv_flags |= IEEE80211_F_DESBSSID;
460 if (flags & IEEE80211_CLONE_WDSLEGACY)
461 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
462 break;
463#ifdef IEEE80211_SUPPORT_TDMA
464 case IEEE80211_M_AHDEMO:
465 if (flags & IEEE80211_CLONE_TDMA) {
466 /* NB: checked before clone operation allowed */
467 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
468 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
469 /*
470 * Propagate TDMA capability to mark vap; this
471 * cannot be removed and is used to distinguish
472 * regular ahdemo operation from ahdemo+tdma.
473 */
474 vap->iv_caps |= IEEE80211_C_TDMA;
475 }
476 break;
477#endif
478 default:
479 break;
480 }
481 /* auto-enable s/w beacon miss support */
482 if (flags & IEEE80211_CLONE_NOBEACONS)
483 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
484 /* auto-generated or user supplied MAC address */
485 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
486 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
487 /*
488 * Enable various functionality by default if we're
489 * capable; the driver can override us if it knows better.
490 */
491 if (vap->iv_caps & IEEE80211_C_WME)
492 vap->iv_flags |= IEEE80211_F_WME;
493 if (vap->iv_caps & IEEE80211_C_BURST)
494 vap->iv_flags |= IEEE80211_F_BURST;
495 /* NB: bg scanning only makes sense for station mode right now */
496 if (vap->iv_opmode == IEEE80211_M_STA &&
497 (vap->iv_caps & IEEE80211_C_BGSCAN))
498 vap->iv_flags |= IEEE80211_F_BGSCAN;
499 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
500 /* NB: DFS support only makes sense for ap mode right now */
501 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
502 (vap->iv_caps & IEEE80211_C_DFS))
503 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
504
505 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
506 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
507 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
508 /*
509 * Install a default reset method for the ioctl support;
510 * the driver can override this.
511 */
512 vap->iv_reset = default_reset;
513
514 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
515
516 ieee80211_sysctl_vattach(vap);
517 ieee80211_crypto_vattach(vap);
518 ieee80211_node_vattach(vap);
519 ieee80211_power_vattach(vap);
520 ieee80211_proto_vattach(vap);
521#ifdef IEEE80211_SUPPORT_SUPERG
522 ieee80211_superg_vattach(vap);
523#endif
524 ieee80211_ht_vattach(vap);
525 ieee80211_scan_vattach(vap);
526 ieee80211_regdomain_vattach(vap);
527 ieee80211_radiotap_vattach(vap);
528 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
529
530 return 0;
531}
532
533/*
534 * Activate a vap. State should have been prepared with a
535 * call to ieee80211_vap_setup and by the driver. On return
536 * from this call the vap is ready for use.
537 */
538int
539ieee80211_vap_attach(struct ieee80211vap *vap,
540 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
541{
542 struct ifnet *ifp = vap->iv_ifp;
543 struct ieee80211com *ic = vap->iv_ic;
544 struct ifmediareq imr;
545 int maxrate;
546
547 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
548 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
549 __func__, ieee80211_opmode_name[vap->iv_opmode],
550 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
551
552 /*
553 * Do late attach work that cannot happen until after
554 * the driver has had a chance to override defaults.
555 */
556 ieee80211_node_latevattach(vap);
557 ieee80211_power_latevattach(vap);
558
559 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
560 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
561 ieee80211_media_status(ifp, &imr);
562 /* NB: strip explicit mode; we're actually in autoselect */
563 ifmedia_set(&vap->iv_media,
564 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
565 if (maxrate)
566 ifp->if_baudrate = IF_Mbps(maxrate);
567
568 ether_ifattach(ifp, vap->iv_myaddr);
569 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
570 /* NB: disallow transmit */
571 ifp->if_transmit = null_transmit;
572 ifp->if_output = null_output;
573 } else {
574 /* hook output method setup by ether_ifattach */
575 vap->iv_output = ifp->if_output;
576 ifp->if_output = ieee80211_output;
577 }
578 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
579
580 IEEE80211_LOCK(ic);
581 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
582 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
583#ifdef IEEE80211_SUPPORT_SUPERG
584 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
585#endif
586 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
587 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
588 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
589 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
590 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
591 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
592 IEEE80211_UNLOCK(ic);
593
594 return 1;
595}
596
597/*
598 * Tear down vap state and reclaim the ifnet.
599 * The driver is assumed to have prepared for
600 * this; e.g. by turning off interrupts for the
601 * underlying device.
602 */
603void
604ieee80211_vap_detach(struct ieee80211vap *vap)
605{
606 struct ieee80211com *ic = vap->iv_ic;
607 struct ifnet *ifp = vap->iv_ifp;
608
609 CURVNET_SET(ifp->if_vnet);
610
611 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
612 __func__, ieee80211_opmode_name[vap->iv_opmode],
613 ic->ic_ifp->if_xname);
614
615 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
616 ether_ifdetach(ifp);
617
618 ieee80211_stop(vap);
619
620 /*
621 * Flush any deferred vap tasks.
622 */
623 ieee80211_draintask(ic, &vap->iv_nstate_task);
624 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
625
626 /* XXX band-aid until ifnet handles this for us */
627 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
628
629 IEEE80211_LOCK(ic);
630 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
631 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
632 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
633#ifdef IEEE80211_SUPPORT_SUPERG
634 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
635#endif
636 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
637 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
638 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
639 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
640 /* NB: this handles the bpfdetach done below */
641 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
642 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
643 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
644 IEEE80211_UNLOCK(ic);
645
646 ifmedia_removeall(&vap->iv_media);
647
648 ieee80211_radiotap_vdetach(vap);
649 ieee80211_regdomain_vdetach(vap);
650 ieee80211_scan_vdetach(vap);
651#ifdef IEEE80211_SUPPORT_SUPERG
652 ieee80211_superg_vdetach(vap);
653#endif
654 ieee80211_ht_vdetach(vap);
655 /* NB: must be before ieee80211_node_vdetach */
656 ieee80211_proto_vdetach(vap);
657 ieee80211_crypto_vdetach(vap);
658 ieee80211_power_vdetach(vap);
659 ieee80211_node_vdetach(vap);
660 ieee80211_sysctl_vdetach(vap);
661
662 if_free(ifp);
663
664 CURVNET_RESTORE();
665}
666
667/*
668 * Synchronize flag bit state in the parent ifnet structure
669 * according to the state of all vap ifnet's. This is used,
670 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
671 */
672void
673ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
674{
675 struct ifnet *ifp = ic->ic_ifp;
676 struct ieee80211vap *vap;
677 int bit, oflags;
678
679 IEEE80211_LOCK_ASSERT(ic);
680
681 bit = 0;
682 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
683 if (vap->iv_ifp->if_flags & flag) {
684 /*
685 * XXX the bridge sets PROMISC but we don't want to
686 * enable it on the device, discard here so all the
687 * drivers don't need to special-case it
688 */
689 if (flag == IFF_PROMISC &&
690 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
691 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
692 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
693 continue;
694 bit = 1;
695 break;
696 }
697 oflags = ifp->if_flags;
698 if (bit)
699 ifp->if_flags |= flag;
700 else
701 ifp->if_flags &= ~flag;
702 if ((ifp->if_flags ^ oflags) & flag) {
703 /* XXX should we return 1/0 and let caller do this? */
704 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
705 if (flag == IFF_PROMISC)
706 ieee80211_runtask(ic, &ic->ic_promisc_task);
707 else if (flag == IFF_ALLMULTI)
708 ieee80211_runtask(ic, &ic->ic_mcast_task);
709 }
710 }
711}
712
713/*
714 * Synchronize flag bit state in the com structure
715 * according to the state of all vap's. This is used,
716 * for example, to handle state changes via ioctls.
717 */
718static void
719ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
720{
721 struct ieee80211vap *vap;
722 int bit;
723
724 IEEE80211_LOCK_ASSERT(ic);
725
726 bit = 0;
727 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
728 if (vap->iv_flags & flag) {
729 bit = 1;
730 break;
731 }
732 if (bit)
733 ic->ic_flags |= flag;
734 else
735 ic->ic_flags &= ~flag;
736}
737
738void
739ieee80211_syncflag(struct ieee80211vap *vap, int flag)
740{
741 struct ieee80211com *ic = vap->iv_ic;
742
743 IEEE80211_LOCK(ic);
744 if (flag < 0) {
745 flag = -flag;
746 vap->iv_flags &= ~flag;
747 } else
748 vap->iv_flags |= flag;
749 ieee80211_syncflag_locked(ic, flag);
750 IEEE80211_UNLOCK(ic);
751}
752
753/*
754 * Synchronize flags_ht bit state in the com structure
755 * according to the state of all vap's. This is used,
756 * for example, to handle state changes via ioctls.
757 */
758static void
759ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
760{
761 struct ieee80211vap *vap;
762 int bit;
763
764 IEEE80211_LOCK_ASSERT(ic);
765
766 bit = 0;
767 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
768 if (vap->iv_flags_ht & flag) {
769 bit = 1;
770 break;
771 }
772 if (bit)
773 ic->ic_flags_ht |= flag;
774 else
775 ic->ic_flags_ht &= ~flag;
776}
777
778void
779ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
780{
781 struct ieee80211com *ic = vap->iv_ic;
782
783 IEEE80211_LOCK(ic);
784 if (flag < 0) {
785 flag = -flag;
786 vap->iv_flags_ht &= ~flag;
787 } else
788 vap->iv_flags_ht |= flag;
789 ieee80211_syncflag_ht_locked(ic, flag);
790 IEEE80211_UNLOCK(ic);
791}
792
793/*
794 * Synchronize flags_ext bit state in the com structure
795 * according to the state of all vap's. This is used,
796 * for example, to handle state changes via ioctls.
797 */
798static void
799ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
800{
801 struct ieee80211vap *vap;
802 int bit;
803
804 IEEE80211_LOCK_ASSERT(ic);
805
806 bit = 0;
807 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
808 if (vap->iv_flags_ext & flag) {
809 bit = 1;
810 break;
811 }
812 if (bit)
813 ic->ic_flags_ext |= flag;
814 else
815 ic->ic_flags_ext &= ~flag;
816}
817
818void
819ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
820{
821 struct ieee80211com *ic = vap->iv_ic;
822
823 IEEE80211_LOCK(ic);
824 if (flag < 0) {
825 flag = -flag;
826 vap->iv_flags_ext &= ~flag;
827 } else
828 vap->iv_flags_ext |= flag;
829 ieee80211_syncflag_ext_locked(ic, flag);
830 IEEE80211_UNLOCK(ic);
831}
832
833static __inline int
834mapgsm(u_int freq, u_int flags)
835{
836 freq *= 10;
837 if (flags & IEEE80211_CHAN_QUARTER)
838 freq += 5;
839 else if (flags & IEEE80211_CHAN_HALF)
840 freq += 10;
841 else
842 freq += 20;
843 /* NB: there is no 907/20 wide but leave room */
844 return (freq - 906*10) / 5;
845}
846
847static __inline int
848mappsb(u_int freq, u_int flags)
849{
850 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
851}
852
853/*
854 * Convert MHz frequency to IEEE channel number.
855 */
856int
857ieee80211_mhz2ieee(u_int freq, u_int flags)
858{
859#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
860 if (flags & IEEE80211_CHAN_GSM)
861 return mapgsm(freq, flags);
862 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
863 if (freq == 2484)
864 return 14;
865 if (freq < 2484)
866 return ((int) freq - 2407) / 5;
867 else
868 return 15 + ((freq - 2512) / 20);
869 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
870 if (freq <= 5000) {
871 /* XXX check regdomain? */
872 if (IS_FREQ_IN_PSB(freq))
873 return mappsb(freq, flags);
874 return (freq - 4000) / 5;
875 } else
876 return (freq - 5000) / 5;
877 } else { /* either, guess */
878 if (freq == 2484)
879 return 14;
880 if (freq < 2484) {
881 if (907 <= freq && freq <= 922)
882 return mapgsm(freq, flags);
883 return ((int) freq - 2407) / 5;
884 }
885 if (freq < 5000) {
886 if (IS_FREQ_IN_PSB(freq))
887 return mappsb(freq, flags);
888 else if (freq > 4900)
889 return (freq - 4000) / 5;
890 else
891 return 15 + ((freq - 2512) / 20);
892 }
893 return (freq - 5000) / 5;
894 }
895#undef IS_FREQ_IN_PSB
896}
897
898/*
899 * Convert channel to IEEE channel number.
900 */
901int
902ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
903{
904 if (c == NULL) {
905 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
906 return 0; /* XXX */
907 }
908 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
909}
910
911/*
912 * Convert IEEE channel number to MHz frequency.
913 */
914u_int
915ieee80211_ieee2mhz(u_int chan, u_int flags)
916{
917 if (flags & IEEE80211_CHAN_GSM)
918 return 907 + 5 * (chan / 10);
919 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
920 if (chan == 14)
921 return 2484;
922 if (chan < 14)
923 return 2407 + chan*5;
924 else
925 return 2512 + ((chan-15)*20);
926 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
927 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
928 chan -= 37;
929 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
930 }
931 return 5000 + (chan*5);
932 } else { /* either, guess */
933 /* XXX can't distinguish PSB+GSM channels */
934 if (chan == 14)
935 return 2484;
936 if (chan < 14) /* 0-13 */
937 return 2407 + chan*5;
938 if (chan < 27) /* 15-26 */
939 return 2512 + ((chan-15)*20);
940 return 5000 + (chan*5);
941 }
942}
943
944/*
945 * Locate a channel given a frequency+flags. We cache
946 * the previous lookup to optimize switching between two
947 * channels--as happens with dynamic turbo.
948 */
949struct ieee80211_channel *
950ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
951{
952 struct ieee80211_channel *c;
953 int i;
954
955 flags &= IEEE80211_CHAN_ALLTURBO;
956 c = ic->ic_prevchan;
957 if (c != NULL && c->ic_freq == freq &&
958 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
959 return c;
960 /* brute force search */
961 for (i = 0; i < ic->ic_nchans; i++) {
962 c = &ic->ic_channels[i];
963 if (c->ic_freq == freq &&
964 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
965 return c;
966 }
967 return NULL;
968}
969
970/*
971 * Locate a channel given a channel number+flags. We cache
972 * the previous lookup to optimize switching between two
973 * channels--as happens with dynamic turbo.
974 */
975struct ieee80211_channel *
976ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
977{
978 struct ieee80211_channel *c;
979 int i;
980
981 flags &= IEEE80211_CHAN_ALLTURBO;
982 c = ic->ic_prevchan;
983 if (c != NULL && c->ic_ieee == ieee &&
984 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
985 return c;
986 /* brute force search */
987 for (i = 0; i < ic->ic_nchans; i++) {
988 c = &ic->ic_channels[i];
989 if (c->ic_ieee == ieee &&
990 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
991 return c;
992 }
993 return NULL;
994}
995
996static void
997addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
998{
999#define ADD(_ic, _s, _o) \
1000 ifmedia_add(media, \
1001 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1002 static const u_int mopts[IEEE80211_MODE_MAX] = {
1003 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1004 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1005 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1006 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1007 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1008 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1009 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1010 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1011 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1012 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1013 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1014 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1015 };
1016 u_int mopt;
1017
1018 mopt = mopts[mode];
1019 if (addsta)
1020 ADD(ic, mword, mopt); /* STA mode has no cap */
1021 if (caps & IEEE80211_C_IBSS)
1022 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1023 if (caps & IEEE80211_C_HOSTAP)
1024 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1025 if (caps & IEEE80211_C_AHDEMO)
1026 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1027 if (caps & IEEE80211_C_MONITOR)
1028 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1029 if (caps & IEEE80211_C_WDS)
1030 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1031 if (caps & IEEE80211_C_MBSS)
1032 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1033#undef ADD
1034}
1035
1036/*
1037 * Setup the media data structures according to the channel and
1038 * rate tables.
1039 */
1040static int
1041ieee80211_media_setup(struct ieee80211com *ic,
1042 struct ifmedia *media, int caps, int addsta,
1043 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1044{
1045 int i, j, rate, maxrate, mword, r;
1046 enum ieee80211_phymode mode;
1047 const struct ieee80211_rateset *rs;
1048 struct ieee80211_rateset allrates;
1049
1050 /*
1051 * Fill in media characteristics.
1052 */
1053 ifmedia_init(media, 0, media_change, media_stat);
1054 maxrate = 0;
1055 /*
1056 * Add media for legacy operating modes.
1057 */
1058 memset(&allrates, 0, sizeof(allrates));
1059 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1060 if (isclr(ic->ic_modecaps, mode))
1061 continue;
1062 addmedia(media, caps, addsta, mode, IFM_AUTO);
1063 if (mode == IEEE80211_MODE_AUTO)
1064 continue;
1065 rs = &ic->ic_sup_rates[mode];
1066 for (i = 0; i < rs->rs_nrates; i++) {
1067 rate = rs->rs_rates[i];
1068 mword = ieee80211_rate2media(ic, rate, mode);
1069 if (mword == 0)
1070 continue;
1071 addmedia(media, caps, addsta, mode, mword);
1072 /*
1073 * Add legacy rate to the collection of all rates.
1074 */
1075 r = rate & IEEE80211_RATE_VAL;
1076 for (j = 0; j < allrates.rs_nrates; j++)
1077 if (allrates.rs_rates[j] == r)
1078 break;
1079 if (j == allrates.rs_nrates) {
1080 /* unique, add to the set */
1081 allrates.rs_rates[j] = r;
1082 allrates.rs_nrates++;
1083 }
1084 rate = (rate & IEEE80211_RATE_VAL) / 2;
1085 if (rate > maxrate)
1086 maxrate = rate;
1087 }
1088 }
1089 for (i = 0; i < allrates.rs_nrates; i++) {
1090 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1091 IEEE80211_MODE_AUTO);
1092 if (mword == 0)
1093 continue;
1094 /* NB: remove media options from mword */
1095 addmedia(media, caps, addsta,
1096 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1097 }
1098 /*
1099 * Add HT/11n media. Note that we do not have enough
1100 * bits in the media subtype to express the MCS so we
1101 * use a "placeholder" media subtype and any fixed MCS
1102 * must be specified with a different mechanism.
1103 */
1104 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1105 if (isclr(ic->ic_modecaps, mode))
1106 continue;
1107 addmedia(media, caps, addsta, mode, IFM_AUTO);
1108 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1109 }
1110 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1111 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1112 addmedia(media, caps, addsta,
1113 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1114 i = ic->ic_txstream * 8 - 1;
1115 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1116 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1117 rate = ieee80211_htrates[i].ht40_rate_400ns;
1118 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1119 rate = ieee80211_htrates[i].ht40_rate_800ns;
1120 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1121 rate = ieee80211_htrates[i].ht20_rate_400ns;
1122 else
1123 rate = ieee80211_htrates[i].ht20_rate_800ns;
1124 if (rate > maxrate)
1125 maxrate = rate;
1126 }
1127 return maxrate;
1128}
1129
1130void
1131ieee80211_media_init(struct ieee80211com *ic)
1132{
1133 struct ifnet *ifp = ic->ic_ifp;
1134 int maxrate;
1135
1136 /* NB: this works because the structure is initialized to zero */
1137 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1138 /*
1139 * We are re-initializing the channel list; clear
1140 * the existing media state as the media routines
1141 * don't suppress duplicates.
1142 */
1143 ifmedia_removeall(&ic->ic_media);
1144 }
1145 ieee80211_chan_init(ic);
1146
1147 /*
1148 * Recalculate media settings in case new channel list changes
1149 * the set of available modes.
1150 */
1151 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1152 ieee80211com_media_change, ieee80211com_media_status);
1153 /* NB: strip explicit mode; we're actually in autoselect */
1154 ifmedia_set(&ic->ic_media,
1155 media_status(ic->ic_opmode, ic->ic_curchan) &~
1156 (IFM_MMASK | IFM_IEEE80211_TURBO));
1157 if (maxrate)
1158 ifp->if_baudrate = IF_Mbps(maxrate);
1159
1160 /* XXX need to propagate new media settings to vap's */
1161}
1162
1163/* XXX inline or eliminate? */
1164const struct ieee80211_rateset *
1165ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1166{
1167 /* XXX does this work for 11ng basic rates? */
1168 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1169}
1170
1171void
1172ieee80211_announce(struct ieee80211com *ic)
1173{
1174 struct ifnet *ifp = ic->ic_ifp;
1175 int i, rate, mword;
1176 enum ieee80211_phymode mode;
1177 const struct ieee80211_rateset *rs;
1178
1179 /* NB: skip AUTO since it has no rates */
1180 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1181 if (isclr(ic->ic_modecaps, mode))
1182 continue;
1183 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1184 rs = &ic->ic_sup_rates[mode];
1185 for (i = 0; i < rs->rs_nrates; i++) {
1186 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1187 if (mword == 0)
1188 continue;
1189 rate = ieee80211_media2rate(mword);
1190 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1191 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1192 }
1193 printf("\n");
1194 }
1195 ieee80211_ht_announce(ic);
1196}
1197
1198void
1199ieee80211_announce_channels(struct ieee80211com *ic)
1200{
1201 const struct ieee80211_channel *c;
1202 char type;
1203 int i, cw;
1204
1205 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1206 for (i = 0; i < ic->ic_nchans; i++) {
1207 c = &ic->ic_channels[i];
1208 if (IEEE80211_IS_CHAN_ST(c))
1209 type = 'S';
1210 else if (IEEE80211_IS_CHAN_108A(c))
1211 type = 'T';
1212 else if (IEEE80211_IS_CHAN_108G(c))
1213 type = 'G';
1214 else if (IEEE80211_IS_CHAN_HT(c))
1215 type = 'n';
1216 else if (IEEE80211_IS_CHAN_A(c))
1217 type = 'a';
1218 else if (IEEE80211_IS_CHAN_ANYG(c))
1219 type = 'g';
1220 else if (IEEE80211_IS_CHAN_B(c))
1221 type = 'b';
1222 else
1223 type = 'f';
1224 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1225 cw = 40;
1226 else if (IEEE80211_IS_CHAN_HALF(c))
1227 cw = 10;
1228 else if (IEEE80211_IS_CHAN_QUARTER(c))
1229 cw = 5;
1230 else
1231 cw = 20;
1232 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1233 , c->ic_ieee, c->ic_freq, type
1234 , cw
1235 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1236 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1237 , c->ic_maxregpower
1238 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1239 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1240 );
1241 }
1242}
1243
1244static int
1245media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1246{
1247 switch (IFM_MODE(ime->ifm_media)) {
1248 case IFM_IEEE80211_11A:
1249 *mode = IEEE80211_MODE_11A;
1250 break;
1251 case IFM_IEEE80211_11B:
1252 *mode = IEEE80211_MODE_11B;
1253 break;
1254 case IFM_IEEE80211_11G:
1255 *mode = IEEE80211_MODE_11G;
1256 break;
1257 case IFM_IEEE80211_FH:
1258 *mode = IEEE80211_MODE_FH;
1259 break;
1260 case IFM_IEEE80211_11NA:
1261 *mode = IEEE80211_MODE_11NA;
1262 break;
1263 case IFM_IEEE80211_11NG:
1264 *mode = IEEE80211_MODE_11NG;
1265 break;
1266 case IFM_AUTO:
1267 *mode = IEEE80211_MODE_AUTO;
1268 break;
1269 default:
1270 return 0;
1271 }
1272 /*
1273 * Turbo mode is an ``option''.
1274 * XXX does not apply to AUTO
1275 */
1276 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1277 if (*mode == IEEE80211_MODE_11A) {
1278 if (flags & IEEE80211_F_TURBOP)
1279 *mode = IEEE80211_MODE_TURBO_A;
1280 else
1281 *mode = IEEE80211_MODE_STURBO_A;
1282 } else if (*mode == IEEE80211_MODE_11G)
1283 *mode = IEEE80211_MODE_TURBO_G;
1284 else
1285 return 0;
1286 }
1287 /* XXX HT40 +/- */
1288 return 1;
1289}
1290
1291/*
1292 * Handle a media change request on the underlying interface.
1293 */
1294int
1295ieee80211com_media_change(struct ifnet *ifp)
1296{
1297 return EINVAL;
1298}
1299
1300/*
1301 * Handle a media change request on the vap interface.
1302 */
1303int
1304ieee80211_media_change(struct ifnet *ifp)
1305{
1306 struct ieee80211vap *vap = ifp->if_softc;
1307 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1308 uint16_t newmode;
1309
1310 if (!media2mode(ime, vap->iv_flags, &newmode))
1311 return EINVAL;
1312 if (vap->iv_des_mode != newmode) {
1313 vap->iv_des_mode = newmode;
1314 /* XXX kick state machine if up+running */
1315 }
1316 return 0;
1317}
1318
1319/*
1320 * Common code to calculate the media status word
1321 * from the operating mode and channel state.
1322 */
1323static int
1324media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1325{
1326 int status;
1327
1328 status = IFM_IEEE80211;
1329 switch (opmode) {
1330 case IEEE80211_M_STA:
1331 break;
1332 case IEEE80211_M_IBSS:
1333 status |= IFM_IEEE80211_ADHOC;
1334 break;
1335 case IEEE80211_M_HOSTAP:
1336 status |= IFM_IEEE80211_HOSTAP;
1337 break;
1338 case IEEE80211_M_MONITOR:
1339 status |= IFM_IEEE80211_MONITOR;
1340 break;
1341 case IEEE80211_M_AHDEMO:
1342 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1343 break;
1344 case IEEE80211_M_WDS:
1345 status |= IFM_IEEE80211_WDS;
1346 break;
1347 case IEEE80211_M_MBSS:
1348 status |= IFM_IEEE80211_MBSS;
1349 break;
1350 }
1351 if (IEEE80211_IS_CHAN_HTA(chan)) {
1352 status |= IFM_IEEE80211_11NA;
1353 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1354 status |= IFM_IEEE80211_11NG;
1355 } else if (IEEE80211_IS_CHAN_A(chan)) {
1356 status |= IFM_IEEE80211_11A;
1357 } else if (IEEE80211_IS_CHAN_B(chan)) {
1358 status |= IFM_IEEE80211_11B;
1359 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1360 status |= IFM_IEEE80211_11G;
1361 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1362 status |= IFM_IEEE80211_FH;
1363 }
1364 /* XXX else complain? */
1365
1366 if (IEEE80211_IS_CHAN_TURBO(chan))
1367 status |= IFM_IEEE80211_TURBO;
1368#if 0
1369 if (IEEE80211_IS_CHAN_HT20(chan))
1370 status |= IFM_IEEE80211_HT20;
1371 if (IEEE80211_IS_CHAN_HT40(chan))
1372 status |= IFM_IEEE80211_HT40;
1373#endif
1374 return status;
1375}
1376
1377static void
1378ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1379{
1380 struct ieee80211com *ic = ifp->if_l2com;
1381 struct ieee80211vap *vap;
1382
1383 imr->ifm_status = IFM_AVALID;
1384 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1385 if (vap->iv_ifp->if_flags & IFF_UP) {
1386 imr->ifm_status |= IFM_ACTIVE;
1387 break;
1388 }
1389 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1390 if (imr->ifm_status & IFM_ACTIVE)
1391 imr->ifm_current = imr->ifm_active;
1392}
1393
1394void
1395ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1396{
1397 struct ieee80211vap *vap = ifp->if_softc;
1398 struct ieee80211com *ic = vap->iv_ic;
1399 enum ieee80211_phymode mode;
1400
1401 imr->ifm_status = IFM_AVALID;
1402 /*
1403 * NB: use the current channel's mode to lock down a xmit
1404 * rate only when running; otherwise we may have a mismatch
1405 * in which case the rate will not be convertible.
1406 */
1407 if (vap->iv_state == IEEE80211_S_RUN) {
1408 imr->ifm_status |= IFM_ACTIVE;
1409 mode = ieee80211_chan2mode(ic->ic_curchan);
1410 } else
1411 mode = IEEE80211_MODE_AUTO;
1412 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1413 /*
1414 * Calculate a current rate if possible.
1415 */
1416 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1417 /*
1418 * A fixed rate is set, report that.
1419 */
1420 imr->ifm_active |= ieee80211_rate2media(ic,
1421 vap->iv_txparms[mode].ucastrate, mode);
1422 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1423 /*
1424 * In station mode report the current transmit rate.
1425 */
1426 imr->ifm_active |= ieee80211_rate2media(ic,
1427 vap->iv_bss->ni_txrate, mode);
1428 } else
1429 imr->ifm_active |= IFM_AUTO;
1430 if (imr->ifm_status & IFM_ACTIVE)
1431 imr->ifm_current = imr->ifm_active;
1432}
1433
1434/*
1435 * Set the current phy mode and recalculate the active channel
1436 * set based on the available channels for this mode. Also
1437 * select a new default/current channel if the current one is
1438 * inappropriate for this mode.
1439 */
1440int
1441ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1442{
1443 /*
1444 * Adjust basic rates in 11b/11g supported rate set.
1445 * Note that if operating on a hal/quarter rate channel
1446 * this is a noop as those rates sets are different
1447 * and used instead.
1448 */
1449 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1450 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1451
1452 ic->ic_curmode = mode;
1453 ieee80211_reset_erp(ic); /* reset ERP state */
1454
1455 return 0;
1456}
1457
1458/*
1459 * Return the phy mode for with the specified channel.
1460 */
1461enum ieee80211_phymode
1462ieee80211_chan2mode(const struct ieee80211_channel *chan)
1463{
1464
1465 if (IEEE80211_IS_CHAN_HTA(chan))
1466 return IEEE80211_MODE_11NA;
1467 else if (IEEE80211_IS_CHAN_HTG(chan))
1468 return IEEE80211_MODE_11NG;
1469 else if (IEEE80211_IS_CHAN_108G(chan))
1470 return IEEE80211_MODE_TURBO_G;
1471 else if (IEEE80211_IS_CHAN_ST(chan))
1472 return IEEE80211_MODE_STURBO_A;
1473 else if (IEEE80211_IS_CHAN_TURBO(chan))
1474 return IEEE80211_MODE_TURBO_A;
1475 else if (IEEE80211_IS_CHAN_HALF(chan))
1476 return IEEE80211_MODE_HALF;
1477 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1478 return IEEE80211_MODE_QUARTER;
1479 else if (IEEE80211_IS_CHAN_A(chan))
1480 return IEEE80211_MODE_11A;
1481 else if (IEEE80211_IS_CHAN_ANYG(chan))
1482 return IEEE80211_MODE_11G;
1483 else if (IEEE80211_IS_CHAN_B(chan))
1484 return IEEE80211_MODE_11B;
1485 else if (IEEE80211_IS_CHAN_FHSS(chan))
1486 return IEEE80211_MODE_FH;
1487
1488 /* NB: should not get here */
1489 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1490 __func__, chan->ic_freq, chan->ic_flags);
1491 return IEEE80211_MODE_11B;
1492}
1493
1494struct ratemedia {
1495 u_int match; /* rate + mode */
1496 u_int media; /* if_media rate */
1497};
1498
1499static int
1500findmedia(const struct ratemedia rates[], int n, u_int match)
1501{
1502 int i;
1503
1504 for (i = 0; i < n; i++)
1505 if (rates[i].match == match)
1506 return rates[i].media;
1507 return IFM_AUTO;
1508}
1509
1510/*
1511 * Convert IEEE80211 rate value to ifmedia subtype.
1512 * Rate is either a legacy rate in units of 0.5Mbps
1513 * or an MCS index.
1514 */
1515int
1516ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1517{
1518#define N(a) (sizeof(a) / sizeof(a[0]))
1519 static const struct ratemedia rates[] = {
1520 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1521 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1522 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1523 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1524 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1525 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1526 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1527 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1528 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1529 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1530 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1531 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1532 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1533 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1534 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1535 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1536 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1537 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1538 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1539 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1540 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1541 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1542 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1543 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1544 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1545 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1546 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1547 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1548 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1549 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1550 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1551 };
1552 static const struct ratemedia htrates[] = {
1553 { 0, IFM_IEEE80211_MCS },
1554 { 1, IFM_IEEE80211_MCS },
1555 { 2, IFM_IEEE80211_MCS },
1556 { 3, IFM_IEEE80211_MCS },
1557 { 4, IFM_IEEE80211_MCS },
1558 { 5, IFM_IEEE80211_MCS },
1559 { 6, IFM_IEEE80211_MCS },
1560 { 7, IFM_IEEE80211_MCS },
1561 { 8, IFM_IEEE80211_MCS },
1562 { 9, IFM_IEEE80211_MCS },
1563 { 10, IFM_IEEE80211_MCS },
1564 { 11, IFM_IEEE80211_MCS },
1565 { 12, IFM_IEEE80211_MCS },
1566 { 13, IFM_IEEE80211_MCS },
1567 { 14, IFM_IEEE80211_MCS },
1568 { 15, IFM_IEEE80211_MCS },
1569 { 16, IFM_IEEE80211_MCS },
1570 { 17, IFM_IEEE80211_MCS },
1571 { 18, IFM_IEEE80211_MCS },
1572 { 19, IFM_IEEE80211_MCS },
1573 { 20, IFM_IEEE80211_MCS },
1574 { 21, IFM_IEEE80211_MCS },
1575 { 22, IFM_IEEE80211_MCS },
1576 { 23, IFM_IEEE80211_MCS },
1577 { 24, IFM_IEEE80211_MCS },
1578 { 25, IFM_IEEE80211_MCS },
1579 { 26, IFM_IEEE80211_MCS },
1580 { 27, IFM_IEEE80211_MCS },
1581 { 28, IFM_IEEE80211_MCS },
1582 { 29, IFM_IEEE80211_MCS },
1583 { 30, IFM_IEEE80211_MCS },
1584 { 31, IFM_IEEE80211_MCS },
1585 { 32, IFM_IEEE80211_MCS },
1586 { 33, IFM_IEEE80211_MCS },
1587 { 34, IFM_IEEE80211_MCS },
1588 { 35, IFM_IEEE80211_MCS },
1589 { 36, IFM_IEEE80211_MCS },
1590 { 37, IFM_IEEE80211_MCS },
1591 { 38, IFM_IEEE80211_MCS },
1592 { 39, IFM_IEEE80211_MCS },
1593 { 40, IFM_IEEE80211_MCS },
1594 { 41, IFM_IEEE80211_MCS },
1595 { 42, IFM_IEEE80211_MCS },
1596 { 43, IFM_IEEE80211_MCS },
1597 { 44, IFM_IEEE80211_MCS },
1598 { 45, IFM_IEEE80211_MCS },
1599 { 46, IFM_IEEE80211_MCS },
1600 { 47, IFM_IEEE80211_MCS },
1601 { 48, IFM_IEEE80211_MCS },
1602 { 49, IFM_IEEE80211_MCS },
1603 { 50, IFM_IEEE80211_MCS },
1604 { 51, IFM_IEEE80211_MCS },
1605 { 52, IFM_IEEE80211_MCS },
1606 { 53, IFM_IEEE80211_MCS },
1607 { 54, IFM_IEEE80211_MCS },
1608 { 55, IFM_IEEE80211_MCS },
1609 { 56, IFM_IEEE80211_MCS },
1610 { 57, IFM_IEEE80211_MCS },
1611 { 58, IFM_IEEE80211_MCS },
1612 { 59, IFM_IEEE80211_MCS },
1613 { 60, IFM_IEEE80211_MCS },
1614 { 61, IFM_IEEE80211_MCS },
1615 { 62, IFM_IEEE80211_MCS },
1616 { 63, IFM_IEEE80211_MCS },
1617 { 64, IFM_IEEE80211_MCS },
1618 { 65, IFM_IEEE80211_MCS },
1619 { 66, IFM_IEEE80211_MCS },
1620 { 67, IFM_IEEE80211_MCS },
1621 { 68, IFM_IEEE80211_MCS },
1622 { 69, IFM_IEEE80211_MCS },
1623 { 70, IFM_IEEE80211_MCS },
1624 { 71, IFM_IEEE80211_MCS },
1625 { 72, IFM_IEEE80211_MCS },
1626 { 73, IFM_IEEE80211_MCS },
1627 { 74, IFM_IEEE80211_MCS },
1628 { 75, IFM_IEEE80211_MCS },
1629 { 76, IFM_IEEE80211_MCS },
1630 };
1631 int m;
1632
1633 /*
1634 * Check 11n rates first for match as an MCS.
1635 */
1636 if (mode == IEEE80211_MODE_11NA) {
1637 if (rate & IEEE80211_RATE_MCS) {
1638 rate &= ~IEEE80211_RATE_MCS;
1639 m = findmedia(htrates, N(htrates), rate);
1640 if (m != IFM_AUTO)
1641 return m | IFM_IEEE80211_11NA;
1642 }
1643 } else if (mode == IEEE80211_MODE_11NG) {
1644 /* NB: 12 is ambiguous, it will be treated as an MCS */
1645 if (rate & IEEE80211_RATE_MCS) {
1646 rate &= ~IEEE80211_RATE_MCS;
1647 m = findmedia(htrates, N(htrates), rate);
1648 if (m != IFM_AUTO)
1649 return m | IFM_IEEE80211_11NG;
1650 }
1651 }
1652 rate &= IEEE80211_RATE_VAL;
1653 switch (mode) {
1654 case IEEE80211_MODE_11A:
1655 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1656 case IEEE80211_MODE_QUARTER:
1657 case IEEE80211_MODE_11NA:
1658 case IEEE80211_MODE_TURBO_A:
1659 case IEEE80211_MODE_STURBO_A:
1660 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1661 case IEEE80211_MODE_11B:
1662 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1663 case IEEE80211_MODE_FH:
1664 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1665 case IEEE80211_MODE_AUTO:
1666 /* NB: ic may be NULL for some drivers */
1667 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1668 return findmedia(rates, N(rates),
1669 rate | IFM_IEEE80211_FH);
1670 /* NB: hack, 11g matches both 11b+11a rates */
1671 /* fall thru... */
1672 case IEEE80211_MODE_11G:
1673 case IEEE80211_MODE_11NG:
1674 case IEEE80211_MODE_TURBO_G:
1675 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1676 }
1677 return IFM_AUTO;
1678#undef N
1679}
1680
1681int
1682ieee80211_media2rate(int mword)
1683{
1684#define N(a) (sizeof(a) / sizeof(a[0]))
1685 static const int ieeerates[] = {
1686 -1, /* IFM_AUTO */
1687 0, /* IFM_MANUAL */
1688 0, /* IFM_NONE */
1689 2, /* IFM_IEEE80211_FH1 */
1690 4, /* IFM_IEEE80211_FH2 */
1691 2, /* IFM_IEEE80211_DS1 */
1692 4, /* IFM_IEEE80211_DS2 */
1693 11, /* IFM_IEEE80211_DS5 */
1694 22, /* IFM_IEEE80211_DS11 */
1695 44, /* IFM_IEEE80211_DS22 */
1696 12, /* IFM_IEEE80211_OFDM6 */
1697 18, /* IFM_IEEE80211_OFDM9 */
1698 24, /* IFM_IEEE80211_OFDM12 */
1699 36, /* IFM_IEEE80211_OFDM18 */
1700 48, /* IFM_IEEE80211_OFDM24 */
1701 72, /* IFM_IEEE80211_OFDM36 */
1702 96, /* IFM_IEEE80211_OFDM48 */
1703 108, /* IFM_IEEE80211_OFDM54 */
1704 144, /* IFM_IEEE80211_OFDM72 */
1705 0, /* IFM_IEEE80211_DS354k */
1706 0, /* IFM_IEEE80211_DS512k */
1707 6, /* IFM_IEEE80211_OFDM3 */
1708 9, /* IFM_IEEE80211_OFDM4 */
1709 54, /* IFM_IEEE80211_OFDM27 */
1710 -1, /* IFM_IEEE80211_MCS */
1711 };
1712 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1713 ieeerates[IFM_SUBTYPE(mword)] : 0;
1714#undef N
1715}
1716
1717/*
1718 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1719 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1720 */
1721#define mix(a, b, c) \
1722do { \
1723 a -= b; a -= c; a ^= (c >> 13); \
1724 b -= c; b -= a; b ^= (a << 8); \
1725 c -= a; c -= b; c ^= (b >> 13); \
1726 a -= b; a -= c; a ^= (c >> 12); \
1727 b -= c; b -= a; b ^= (a << 16); \
1728 c -= a; c -= b; c ^= (b >> 5); \
1729 a -= b; a -= c; a ^= (c >> 3); \
1730 b -= c; b -= a; b ^= (a << 10); \
1731 c -= a; c -= b; c ^= (b >> 15); \
1732} while (/*CONSTCOND*/0)
1733
1734uint32_t
1735ieee80211_mac_hash(const struct ieee80211com *ic,
1736 const uint8_t addr[IEEE80211_ADDR_LEN])
1737{
1738 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
1739
1740 b += addr[5] << 8;
1741 b += addr[4];
1742 a += addr[3] << 24;
1743 a += addr[2] << 16;
1744 a += addr[1] << 8;
1745 a += addr[0];
1746
1747 mix(a, b, c);
1748
1749 return c;
1750}
1751#undef mix
|