28
29#include "opt_wlan.h"
30
31#ifdef IEEE80211_SUPPORT_SUPERG
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/mbuf.h>
36#include <sys/kernel.h>
37#include <sys/endian.h>
38
39#include <sys/socket.h>
40
41#include <net/bpf.h>
42#include <net/ethernet.h>
43#include <net/if.h>
44#include <net/if_llc.h>
45#include <net/if_media.h>
46
47#include <net80211/ieee80211_var.h>
48#include <net80211/ieee80211_input.h>
49#include <net80211/ieee80211_phy.h>
50#include <net80211/ieee80211_superg.h>
51
52/*
53 * Atheros fast-frame encapsulation format.
54 * FF max payload:
55 * 802.2 + FFHDR + HPAD + 802.3 + 802.2 + 1500 + SPAD + 802.3 + 802.2 + 1500:
56 * 8 + 4 + 4 + 14 + 8 + 1500 + 6 + 14 + 8 + 1500
57 * = 3066
58 */
59/* fast frame header is 32-bits */
60#define ATH_FF_PROTO 0x0000003f /* protocol */
61#define ATH_FF_PROTO_S 0
62#define ATH_FF_FTYPE 0x000000c0 /* frame type */
63#define ATH_FF_FTYPE_S 6
64#define ATH_FF_HLEN32 0x00000300 /* optional hdr length */
65#define ATH_FF_HLEN32_S 8
66#define ATH_FF_SEQNUM 0x001ffc00 /* sequence number */
67#define ATH_FF_SEQNUM_S 10
68#define ATH_FF_OFFSET 0xffe00000 /* offset to 2nd payload */
69#define ATH_FF_OFFSET_S 21
70
71#define ATH_FF_MAX_HDR_PAD 4
72#define ATH_FF_MAX_SEP_PAD 6
73#define ATH_FF_MAX_HDR 30
74
75#define ATH_FF_PROTO_L2TUNNEL 0 /* L2 tunnel protocol */
76#define ATH_FF_ETH_TYPE 0x88bd /* Ether type for encapsulated frames */
77#define ATH_FF_SNAP_ORGCODE_0 0x00
78#define ATH_FF_SNAP_ORGCODE_1 0x03
79#define ATH_FF_SNAP_ORGCODE_2 0x7f
80
81#define ATH_FF_TXQMIN 2 /* min txq depth for staging */
82#define ATH_FF_TXQMAX 50 /* maximum # of queued frames allowed */
83#define ATH_FF_STAGEMAX 5 /* max waiting period for staged frame*/
84
85#define ETHER_HEADER_COPY(dst, src) \
86 memcpy(dst, src, sizeof(struct ether_header))
87
88static int ieee80211_ffppsmin = 2; /* pps threshold for ff aggregation */
89SYSCTL_INT(_net_wlan, OID_AUTO, ffppsmin, CTLTYPE_INT | CTLFLAG_RW,
90 &ieee80211_ffppsmin, 0, "min packet rate before fast-frame staging");
91static int ieee80211_ffagemax = -1; /* max time frames held on stage q */
92SYSCTL_PROC(_net_wlan, OID_AUTO, ffagemax, CTLTYPE_INT | CTLFLAG_RW,
93 &ieee80211_ffagemax, 0, ieee80211_sysctl_msecs_ticks, "I",
94 "max hold time for fast-frame staging (ms)");
95
96void
97ieee80211_superg_attach(struct ieee80211com *ic)
98{
99 struct ieee80211_superg *sg;
100
101 if (ic->ic_caps & IEEE80211_C_FF) {
102 sg = (struct ieee80211_superg *) malloc(
103 sizeof(struct ieee80211_superg), M_80211_VAP,
104 M_NOWAIT | M_ZERO);
105 if (sg == NULL) {
106 printf("%s: cannot allocate SuperG state block\n",
107 __func__);
108 return;
109 }
110 ic->ic_superg = sg;
111 }
112 ieee80211_ffagemax = msecs_to_ticks(150);
113}
114
115void
116ieee80211_superg_detach(struct ieee80211com *ic)
117{
118 if (ic->ic_superg != NULL) {
119 free(ic->ic_superg, M_80211_VAP);
120 ic->ic_superg = NULL;
121 }
122}
123
124void
125ieee80211_superg_vattach(struct ieee80211vap *vap)
126{
127 struct ieee80211com *ic = vap->iv_ic;
128
129 if (ic->ic_superg == NULL) /* NB: can't do fast-frames w/o state */
130 vap->iv_caps &= ~IEEE80211_C_FF;
131 if (vap->iv_caps & IEEE80211_C_FF)
132 vap->iv_flags |= IEEE80211_F_FF;
133 /* NB: we only implement sta mode */
134 if (vap->iv_opmode == IEEE80211_M_STA &&
135 (vap->iv_caps & IEEE80211_C_TURBOP))
136 vap->iv_flags |= IEEE80211_F_TURBOP;
137}
138
139void
140ieee80211_superg_vdetach(struct ieee80211vap *vap)
141{
142}
143
144#define ATH_OUI_BYTES 0x00, 0x03, 0x7f
145/*
146 * Add a WME information element to a frame.
147 */
148uint8_t *
149ieee80211_add_ath(uint8_t *frm, uint8_t caps, ieee80211_keyix defkeyix)
150{
151 static const struct ieee80211_ath_ie info = {
152 .ath_id = IEEE80211_ELEMID_VENDOR,
153 .ath_len = sizeof(struct ieee80211_ath_ie) - 2,
154 .ath_oui = { ATH_OUI_BYTES },
155 .ath_oui_type = ATH_OUI_TYPE,
156 .ath_oui_subtype= ATH_OUI_SUBTYPE,
157 .ath_version = ATH_OUI_VERSION,
158 };
159 struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm;
160
161 memcpy(frm, &info, sizeof(info));
162 ath->ath_capability = caps;
163 if (defkeyix != IEEE80211_KEYIX_NONE) {
164 ath->ath_defkeyix[0] = (defkeyix & 0xff);
165 ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff);
166 } else {
167 ath->ath_defkeyix[0] = 0xff;
168 ath->ath_defkeyix[1] = 0x7f;
169 }
170 return frm + sizeof(info);
171}
172#undef ATH_OUI_BYTES
173
174uint8_t *
175ieee80211_add_athcaps(uint8_t *frm, const struct ieee80211_node *bss)
176{
177 const struct ieee80211vap *vap = bss->ni_vap;
178
179 return ieee80211_add_ath(frm,
180 vap->iv_flags & IEEE80211_F_ATHEROS,
181 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
182 bss->ni_authmode != IEEE80211_AUTH_8021X) ?
183 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
184}
185
186void
187ieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie)
188{
189 const struct ieee80211_ath_ie *ath =
190 (const struct ieee80211_ath_ie *) ie;
191
192 ni->ni_ath_flags = ath->ath_capability;
193 ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix);
194}
195
196int
197ieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm,
198 const struct ieee80211_frame *wh)
199{
200 struct ieee80211vap *vap = ni->ni_vap;
201 const struct ieee80211_ath_ie *ath;
202 u_int len = frm[1];
203 int capschanged;
204 uint16_t defkeyix;
205
206 if (len < sizeof(struct ieee80211_ath_ie)-2) {
207 IEEE80211_DISCARD_IE(vap,
208 IEEE80211_MSG_ELEMID | IEEE80211_MSG_SUPERG,
209 wh, "Atheros", "too short, len %u", len);
210 return -1;
211 }
212 ath = (const struct ieee80211_ath_ie *)frm;
213 capschanged = (ni->ni_ath_flags != ath->ath_capability);
214 defkeyix = LE_READ_2(ath->ath_defkeyix);
215 if (capschanged || defkeyix != ni->ni_ath_defkeyix) {
216 ni->ni_ath_flags = ath->ath_capability;
217 ni->ni_ath_defkeyix = defkeyix;
218 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
219 "ath ie change: new caps 0x%x defkeyix 0x%x",
220 ni->ni_ath_flags, ni->ni_ath_defkeyix);
221 }
222 if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) {
223 uint16_t curflags, newflags;
224
225 /*
226 * Check for turbo mode switch. Calculate flags
227 * for the new mode and effect the switch.
228 */
229 newflags = curflags = vap->iv_ic->ic_bsschan->ic_flags;
230 /* NB: BOOST is not in ic_flags, so get it from the ie */
231 if (ath->ath_capability & ATHEROS_CAP_BOOST)
232 newflags |= IEEE80211_CHAN_TURBO;
233 else
234 newflags &= ~IEEE80211_CHAN_TURBO;
235 if (newflags != curflags)
236 ieee80211_dturbo_switch(vap, newflags);
237 }
238 return capschanged;
239}
240
241/*
242 * Decap the encapsulated frame pair and dispatch the first
243 * for delivery. The second frame is returned for delivery
244 * via the normal path.
245 */
246struct mbuf *
247ieee80211_ff_decap(struct ieee80211_node *ni, struct mbuf *m)
248{
249#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
250#define MS(x,f) (((x) & f) >> f##_S)
251 struct ieee80211vap *vap = ni->ni_vap;
252 struct llc *llc;
253 uint32_t ath;
254 struct mbuf *n;
255 int framelen;
256
257 /* NB: we assume caller does this check for us */
258 KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),
259 ("ff not negotiated"));
260 /*
261 * Check for fast-frame tunnel encapsulation.
262 */
263 if (m->m_pkthdr.len < 3*FF_LLC_SIZE)
264 return m;
265 if (m->m_len < FF_LLC_SIZE &&
266 (m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
267 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
268 ni->ni_macaddr, "fast-frame",
269 "%s", "m_pullup(llc) failed");
270 vap->iv_stats.is_rx_tooshort++;
271 return NULL;
272 }
273 llc = (struct llc *)(mtod(m, uint8_t *) +
274 sizeof(struct ether_header));
275 if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE))
276 return m;
277 m_adj(m, FF_LLC_SIZE);
278 m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);
279 if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {
280 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
281 ni->ni_macaddr, "fast-frame",
282 "unsupport tunnel protocol, header 0x%x", ath);
283 vap->iv_stats.is_ff_badhdr++;
284 m_freem(m);
285 return NULL;
286 }
287 /* NB: skip header and alignment padding */
288 m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2);
289
290 vap->iv_stats.is_ff_decap++;
291
292 /*
293 * Decap the first frame, bust it apart from the
294 * second and deliver; then decap the second frame
295 * and return it to the caller for normal delivery.
296 */
297 m = ieee80211_decap1(m, &framelen);
298 if (m == NULL) {
299 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
300 ni->ni_macaddr, "fast-frame", "%s", "first decap failed");
301 vap->iv_stats.is_ff_tooshort++;
302 return NULL;
303 }
304 n = m_split(m, framelen, M_NOWAIT);
305 if (n == NULL) {
306 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
307 ni->ni_macaddr, "fast-frame",
308 "%s", "unable to split encapsulated frames");
309 vap->iv_stats.is_ff_split++;
310 m_freem(m); /* NB: must reclaim */
311 return NULL;
312 }
313 /* XXX not right for WDS */
314 vap->iv_deliver_data(vap, ni, m); /* 1st of pair */
315
316 /*
317 * Decap second frame.
318 */
319 m_adj(n, roundup2(framelen, 4) - framelen); /* padding */
320 n = ieee80211_decap1(n, &framelen);
321 if (n == NULL) {
322 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
323 ni->ni_macaddr, "fast-frame", "%s", "second decap failed");
324 vap->iv_stats.is_ff_tooshort++;
325 }
326 /* XXX verify framelen against mbuf contents */
327 return n; /* 2nd delivered by caller */
328#undef MS
329#undef FF_LLC_SIZE
330}
331
332/*
333 * Do Ethernet-LLC encapsulation for each payload in a fast frame
334 * tunnel encapsulation. The frame is assumed to have an Ethernet
335 * header at the front that must be stripped before prepending the
336 * LLC followed by the Ethernet header passed in (with an Ethernet
337 * type that specifies the payload size).
338 */
339static struct mbuf *
340ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
341 const struct ether_header *eh)
342{
343 struct llc *llc;
344 uint16_t payload;
345
346 /* XXX optimize by combining m_adj+M_PREPEND */
347 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
348 llc = mtod(m, struct llc *);
349 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
350 llc->llc_control = LLC_UI;
351 llc->llc_snap.org_code[0] = 0;
352 llc->llc_snap.org_code[1] = 0;
353 llc->llc_snap.org_code[2] = 0;
354 llc->llc_snap.ether_type = eh->ether_type;
355 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
356
357 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT);
358 if (m == NULL) { /* XXX cannot happen */
359 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
360 "%s: no space for ether_header\n", __func__);
361 vap->iv_stats.is_tx_nobuf++;
362 return NULL;
363 }
364 ETHER_HEADER_COPY(mtod(m, void *), eh);
365 mtod(m, struct ether_header *)->ether_type = htons(payload);
366 return m;
367}
368
369/*
370 * Fast frame encapsulation. There must be two packets
371 * chained with m_nextpkt. We do header adjustment for
372 * each, add the tunnel encapsulation, and then concatenate
373 * the mbuf chains to form a single frame for transmission.
374 */
375struct mbuf *
376ieee80211_ff_encap(struct ieee80211vap *vap, struct mbuf *m1, int hdrspace,
377 struct ieee80211_key *key)
378{
379 struct mbuf *m2;
380 struct ether_header eh1, eh2;
381 struct llc *llc;
382 struct mbuf *m;
383 int pad;
384
385 m2 = m1->m_nextpkt;
386 if (m2 == NULL) {
387 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
388 "%s: only one frame\n", __func__);
389 goto bad;
390 }
391 m1->m_nextpkt = NULL;
392 /*
393 * Include fast frame headers in adjusting header layout.
394 */
395 KASSERT(m1->m_len >= sizeof(eh1), ("no ethernet header!"));
396 ETHER_HEADER_COPY(&eh1, mtod(m1, caddr_t));
397 m1 = ieee80211_mbuf_adjust(vap,
398 hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 +
399 sizeof(struct ether_header),
400 key, m1);
401 if (m1 == NULL) {
402 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
403 m_freem(m2);
404 goto bad;
405 }
406
407 /*
408 * Copy second frame's Ethernet header out of line
409 * and adjust for encapsulation headers. Note that
410 * we make room for padding in case there isn't room
411 * at the end of first frame.
412 */
413 KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!"));
414 ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t));
415 m2 = ieee80211_mbuf_adjust(vap,
416 ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header),
417 NULL, m2);
418 if (m2 == NULL) {
419 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
420 goto bad;
421 }
422
423 /*
424 * Now do tunnel encapsulation. First, each
425 * frame gets a standard encapsulation.
426 */
427 m1 = ff_encap1(vap, m1, &eh1);
428 if (m1 == NULL)
429 goto bad;
430 m2 = ff_encap1(vap, m2, &eh2);
431 if (m2 == NULL)
432 goto bad;
433
434 /*
435 * Pad leading frame to a 4-byte boundary. If there
436 * is space at the end of the first frame, put it
437 * there; otherwise prepend to the front of the second
438 * frame. We know doing the second will always work
439 * because we reserve space above. We prefer appending
440 * as this typically has better DMA alignment properties.
441 */
442 for (m = m1; m->m_next != NULL; m = m->m_next)
443 ;
444 pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len;
445 if (pad) {
446 if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */
447 m2->m_data -= pad;
448 m2->m_len += pad;
449 m2->m_pkthdr.len += pad;
450 } else { /* append to first */
451 m->m_len += pad;
452 m1->m_pkthdr.len += pad;
453 }
454 }
455
456 /*
457 * Now, stick 'em together and prepend the tunnel headers;
458 * first the Atheros tunnel header (all zero for now) and
459 * then a special fast frame LLC.
460 *
461 * XXX optimize by prepending together
462 */
463 m->m_next = m2; /* NB: last mbuf from above */
464 m1->m_pkthdr.len += m2->m_pkthdr.len;
465 M_PREPEND(m1, sizeof(uint32_t)+2, M_NOWAIT);
466 if (m1 == NULL) { /* XXX cannot happen */
467 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
468 "%s: no space for tunnel header\n", __func__);
469 vap->iv_stats.is_tx_nobuf++;
470 return NULL;
471 }
472 memset(mtod(m1, void *), 0, sizeof(uint32_t)+2);
473
474 M_PREPEND(m1, sizeof(struct llc), M_NOWAIT);
475 if (m1 == NULL) { /* XXX cannot happen */
476 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
477 "%s: no space for llc header\n", __func__);
478 vap->iv_stats.is_tx_nobuf++;
479 return NULL;
480 }
481 llc = mtod(m1, struct llc *);
482 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
483 llc->llc_control = LLC_UI;
484 llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0;
485 llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1;
486 llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2;
487 llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE);
488
489 vap->iv_stats.is_ff_encap++;
490
491 return m1;
492bad:
493 if (m1 != NULL)
494 m_freem(m1);
495 if (m2 != NULL)
496 m_freem(m2);
497 return NULL;
498}
499
500static void
501ff_transmit(struct ieee80211_node *ni, struct mbuf *m)
502{
503 struct ieee80211vap *vap = ni->ni_vap;
504 struct ieee80211com *ic = ni->ni_ic;
505 int error;
506
507 IEEE80211_TX_LOCK_ASSERT(vap->iv_ic);
508
509 /* encap and xmit */
510 m = ieee80211_encap(vap, ni, m);
511 if (m != NULL) {
512 struct ifnet *ifp = vap->iv_ifp;
513
| 28
29#include "opt_wlan.h"
30
31#ifdef IEEE80211_SUPPORT_SUPERG
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/mbuf.h>
36#include <sys/kernel.h>
37#include <sys/endian.h>
38
39#include <sys/socket.h>
40
41#include <net/bpf.h>
42#include <net/ethernet.h>
43#include <net/if.h>
44#include <net/if_llc.h>
45#include <net/if_media.h>
46
47#include <net80211/ieee80211_var.h>
48#include <net80211/ieee80211_input.h>
49#include <net80211/ieee80211_phy.h>
50#include <net80211/ieee80211_superg.h>
51
52/*
53 * Atheros fast-frame encapsulation format.
54 * FF max payload:
55 * 802.2 + FFHDR + HPAD + 802.3 + 802.2 + 1500 + SPAD + 802.3 + 802.2 + 1500:
56 * 8 + 4 + 4 + 14 + 8 + 1500 + 6 + 14 + 8 + 1500
57 * = 3066
58 */
59/* fast frame header is 32-bits */
60#define ATH_FF_PROTO 0x0000003f /* protocol */
61#define ATH_FF_PROTO_S 0
62#define ATH_FF_FTYPE 0x000000c0 /* frame type */
63#define ATH_FF_FTYPE_S 6
64#define ATH_FF_HLEN32 0x00000300 /* optional hdr length */
65#define ATH_FF_HLEN32_S 8
66#define ATH_FF_SEQNUM 0x001ffc00 /* sequence number */
67#define ATH_FF_SEQNUM_S 10
68#define ATH_FF_OFFSET 0xffe00000 /* offset to 2nd payload */
69#define ATH_FF_OFFSET_S 21
70
71#define ATH_FF_MAX_HDR_PAD 4
72#define ATH_FF_MAX_SEP_PAD 6
73#define ATH_FF_MAX_HDR 30
74
75#define ATH_FF_PROTO_L2TUNNEL 0 /* L2 tunnel protocol */
76#define ATH_FF_ETH_TYPE 0x88bd /* Ether type for encapsulated frames */
77#define ATH_FF_SNAP_ORGCODE_0 0x00
78#define ATH_FF_SNAP_ORGCODE_1 0x03
79#define ATH_FF_SNAP_ORGCODE_2 0x7f
80
81#define ATH_FF_TXQMIN 2 /* min txq depth for staging */
82#define ATH_FF_TXQMAX 50 /* maximum # of queued frames allowed */
83#define ATH_FF_STAGEMAX 5 /* max waiting period for staged frame*/
84
85#define ETHER_HEADER_COPY(dst, src) \
86 memcpy(dst, src, sizeof(struct ether_header))
87
88static int ieee80211_ffppsmin = 2; /* pps threshold for ff aggregation */
89SYSCTL_INT(_net_wlan, OID_AUTO, ffppsmin, CTLTYPE_INT | CTLFLAG_RW,
90 &ieee80211_ffppsmin, 0, "min packet rate before fast-frame staging");
91static int ieee80211_ffagemax = -1; /* max time frames held on stage q */
92SYSCTL_PROC(_net_wlan, OID_AUTO, ffagemax, CTLTYPE_INT | CTLFLAG_RW,
93 &ieee80211_ffagemax, 0, ieee80211_sysctl_msecs_ticks, "I",
94 "max hold time for fast-frame staging (ms)");
95
96void
97ieee80211_superg_attach(struct ieee80211com *ic)
98{
99 struct ieee80211_superg *sg;
100
101 if (ic->ic_caps & IEEE80211_C_FF) {
102 sg = (struct ieee80211_superg *) malloc(
103 sizeof(struct ieee80211_superg), M_80211_VAP,
104 M_NOWAIT | M_ZERO);
105 if (sg == NULL) {
106 printf("%s: cannot allocate SuperG state block\n",
107 __func__);
108 return;
109 }
110 ic->ic_superg = sg;
111 }
112 ieee80211_ffagemax = msecs_to_ticks(150);
113}
114
115void
116ieee80211_superg_detach(struct ieee80211com *ic)
117{
118 if (ic->ic_superg != NULL) {
119 free(ic->ic_superg, M_80211_VAP);
120 ic->ic_superg = NULL;
121 }
122}
123
124void
125ieee80211_superg_vattach(struct ieee80211vap *vap)
126{
127 struct ieee80211com *ic = vap->iv_ic;
128
129 if (ic->ic_superg == NULL) /* NB: can't do fast-frames w/o state */
130 vap->iv_caps &= ~IEEE80211_C_FF;
131 if (vap->iv_caps & IEEE80211_C_FF)
132 vap->iv_flags |= IEEE80211_F_FF;
133 /* NB: we only implement sta mode */
134 if (vap->iv_opmode == IEEE80211_M_STA &&
135 (vap->iv_caps & IEEE80211_C_TURBOP))
136 vap->iv_flags |= IEEE80211_F_TURBOP;
137}
138
139void
140ieee80211_superg_vdetach(struct ieee80211vap *vap)
141{
142}
143
144#define ATH_OUI_BYTES 0x00, 0x03, 0x7f
145/*
146 * Add a WME information element to a frame.
147 */
148uint8_t *
149ieee80211_add_ath(uint8_t *frm, uint8_t caps, ieee80211_keyix defkeyix)
150{
151 static const struct ieee80211_ath_ie info = {
152 .ath_id = IEEE80211_ELEMID_VENDOR,
153 .ath_len = sizeof(struct ieee80211_ath_ie) - 2,
154 .ath_oui = { ATH_OUI_BYTES },
155 .ath_oui_type = ATH_OUI_TYPE,
156 .ath_oui_subtype= ATH_OUI_SUBTYPE,
157 .ath_version = ATH_OUI_VERSION,
158 };
159 struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm;
160
161 memcpy(frm, &info, sizeof(info));
162 ath->ath_capability = caps;
163 if (defkeyix != IEEE80211_KEYIX_NONE) {
164 ath->ath_defkeyix[0] = (defkeyix & 0xff);
165 ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff);
166 } else {
167 ath->ath_defkeyix[0] = 0xff;
168 ath->ath_defkeyix[1] = 0x7f;
169 }
170 return frm + sizeof(info);
171}
172#undef ATH_OUI_BYTES
173
174uint8_t *
175ieee80211_add_athcaps(uint8_t *frm, const struct ieee80211_node *bss)
176{
177 const struct ieee80211vap *vap = bss->ni_vap;
178
179 return ieee80211_add_ath(frm,
180 vap->iv_flags & IEEE80211_F_ATHEROS,
181 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
182 bss->ni_authmode != IEEE80211_AUTH_8021X) ?
183 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
184}
185
186void
187ieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie)
188{
189 const struct ieee80211_ath_ie *ath =
190 (const struct ieee80211_ath_ie *) ie;
191
192 ni->ni_ath_flags = ath->ath_capability;
193 ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix);
194}
195
196int
197ieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm,
198 const struct ieee80211_frame *wh)
199{
200 struct ieee80211vap *vap = ni->ni_vap;
201 const struct ieee80211_ath_ie *ath;
202 u_int len = frm[1];
203 int capschanged;
204 uint16_t defkeyix;
205
206 if (len < sizeof(struct ieee80211_ath_ie)-2) {
207 IEEE80211_DISCARD_IE(vap,
208 IEEE80211_MSG_ELEMID | IEEE80211_MSG_SUPERG,
209 wh, "Atheros", "too short, len %u", len);
210 return -1;
211 }
212 ath = (const struct ieee80211_ath_ie *)frm;
213 capschanged = (ni->ni_ath_flags != ath->ath_capability);
214 defkeyix = LE_READ_2(ath->ath_defkeyix);
215 if (capschanged || defkeyix != ni->ni_ath_defkeyix) {
216 ni->ni_ath_flags = ath->ath_capability;
217 ni->ni_ath_defkeyix = defkeyix;
218 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
219 "ath ie change: new caps 0x%x defkeyix 0x%x",
220 ni->ni_ath_flags, ni->ni_ath_defkeyix);
221 }
222 if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) {
223 uint16_t curflags, newflags;
224
225 /*
226 * Check for turbo mode switch. Calculate flags
227 * for the new mode and effect the switch.
228 */
229 newflags = curflags = vap->iv_ic->ic_bsschan->ic_flags;
230 /* NB: BOOST is not in ic_flags, so get it from the ie */
231 if (ath->ath_capability & ATHEROS_CAP_BOOST)
232 newflags |= IEEE80211_CHAN_TURBO;
233 else
234 newflags &= ~IEEE80211_CHAN_TURBO;
235 if (newflags != curflags)
236 ieee80211_dturbo_switch(vap, newflags);
237 }
238 return capschanged;
239}
240
241/*
242 * Decap the encapsulated frame pair and dispatch the first
243 * for delivery. The second frame is returned for delivery
244 * via the normal path.
245 */
246struct mbuf *
247ieee80211_ff_decap(struct ieee80211_node *ni, struct mbuf *m)
248{
249#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
250#define MS(x,f) (((x) & f) >> f##_S)
251 struct ieee80211vap *vap = ni->ni_vap;
252 struct llc *llc;
253 uint32_t ath;
254 struct mbuf *n;
255 int framelen;
256
257 /* NB: we assume caller does this check for us */
258 KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),
259 ("ff not negotiated"));
260 /*
261 * Check for fast-frame tunnel encapsulation.
262 */
263 if (m->m_pkthdr.len < 3*FF_LLC_SIZE)
264 return m;
265 if (m->m_len < FF_LLC_SIZE &&
266 (m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
267 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
268 ni->ni_macaddr, "fast-frame",
269 "%s", "m_pullup(llc) failed");
270 vap->iv_stats.is_rx_tooshort++;
271 return NULL;
272 }
273 llc = (struct llc *)(mtod(m, uint8_t *) +
274 sizeof(struct ether_header));
275 if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE))
276 return m;
277 m_adj(m, FF_LLC_SIZE);
278 m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);
279 if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {
280 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
281 ni->ni_macaddr, "fast-frame",
282 "unsupport tunnel protocol, header 0x%x", ath);
283 vap->iv_stats.is_ff_badhdr++;
284 m_freem(m);
285 return NULL;
286 }
287 /* NB: skip header and alignment padding */
288 m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2);
289
290 vap->iv_stats.is_ff_decap++;
291
292 /*
293 * Decap the first frame, bust it apart from the
294 * second and deliver; then decap the second frame
295 * and return it to the caller for normal delivery.
296 */
297 m = ieee80211_decap1(m, &framelen);
298 if (m == NULL) {
299 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
300 ni->ni_macaddr, "fast-frame", "%s", "first decap failed");
301 vap->iv_stats.is_ff_tooshort++;
302 return NULL;
303 }
304 n = m_split(m, framelen, M_NOWAIT);
305 if (n == NULL) {
306 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
307 ni->ni_macaddr, "fast-frame",
308 "%s", "unable to split encapsulated frames");
309 vap->iv_stats.is_ff_split++;
310 m_freem(m); /* NB: must reclaim */
311 return NULL;
312 }
313 /* XXX not right for WDS */
314 vap->iv_deliver_data(vap, ni, m); /* 1st of pair */
315
316 /*
317 * Decap second frame.
318 */
319 m_adj(n, roundup2(framelen, 4) - framelen); /* padding */
320 n = ieee80211_decap1(n, &framelen);
321 if (n == NULL) {
322 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
323 ni->ni_macaddr, "fast-frame", "%s", "second decap failed");
324 vap->iv_stats.is_ff_tooshort++;
325 }
326 /* XXX verify framelen against mbuf contents */
327 return n; /* 2nd delivered by caller */
328#undef MS
329#undef FF_LLC_SIZE
330}
331
332/*
333 * Do Ethernet-LLC encapsulation for each payload in a fast frame
334 * tunnel encapsulation. The frame is assumed to have an Ethernet
335 * header at the front that must be stripped before prepending the
336 * LLC followed by the Ethernet header passed in (with an Ethernet
337 * type that specifies the payload size).
338 */
339static struct mbuf *
340ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
341 const struct ether_header *eh)
342{
343 struct llc *llc;
344 uint16_t payload;
345
346 /* XXX optimize by combining m_adj+M_PREPEND */
347 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
348 llc = mtod(m, struct llc *);
349 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
350 llc->llc_control = LLC_UI;
351 llc->llc_snap.org_code[0] = 0;
352 llc->llc_snap.org_code[1] = 0;
353 llc->llc_snap.org_code[2] = 0;
354 llc->llc_snap.ether_type = eh->ether_type;
355 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
356
357 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT);
358 if (m == NULL) { /* XXX cannot happen */
359 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
360 "%s: no space for ether_header\n", __func__);
361 vap->iv_stats.is_tx_nobuf++;
362 return NULL;
363 }
364 ETHER_HEADER_COPY(mtod(m, void *), eh);
365 mtod(m, struct ether_header *)->ether_type = htons(payload);
366 return m;
367}
368
369/*
370 * Fast frame encapsulation. There must be two packets
371 * chained with m_nextpkt. We do header adjustment for
372 * each, add the tunnel encapsulation, and then concatenate
373 * the mbuf chains to form a single frame for transmission.
374 */
375struct mbuf *
376ieee80211_ff_encap(struct ieee80211vap *vap, struct mbuf *m1, int hdrspace,
377 struct ieee80211_key *key)
378{
379 struct mbuf *m2;
380 struct ether_header eh1, eh2;
381 struct llc *llc;
382 struct mbuf *m;
383 int pad;
384
385 m2 = m1->m_nextpkt;
386 if (m2 == NULL) {
387 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
388 "%s: only one frame\n", __func__);
389 goto bad;
390 }
391 m1->m_nextpkt = NULL;
392 /*
393 * Include fast frame headers in adjusting header layout.
394 */
395 KASSERT(m1->m_len >= sizeof(eh1), ("no ethernet header!"));
396 ETHER_HEADER_COPY(&eh1, mtod(m1, caddr_t));
397 m1 = ieee80211_mbuf_adjust(vap,
398 hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 +
399 sizeof(struct ether_header),
400 key, m1);
401 if (m1 == NULL) {
402 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
403 m_freem(m2);
404 goto bad;
405 }
406
407 /*
408 * Copy second frame's Ethernet header out of line
409 * and adjust for encapsulation headers. Note that
410 * we make room for padding in case there isn't room
411 * at the end of first frame.
412 */
413 KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!"));
414 ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t));
415 m2 = ieee80211_mbuf_adjust(vap,
416 ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header),
417 NULL, m2);
418 if (m2 == NULL) {
419 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
420 goto bad;
421 }
422
423 /*
424 * Now do tunnel encapsulation. First, each
425 * frame gets a standard encapsulation.
426 */
427 m1 = ff_encap1(vap, m1, &eh1);
428 if (m1 == NULL)
429 goto bad;
430 m2 = ff_encap1(vap, m2, &eh2);
431 if (m2 == NULL)
432 goto bad;
433
434 /*
435 * Pad leading frame to a 4-byte boundary. If there
436 * is space at the end of the first frame, put it
437 * there; otherwise prepend to the front of the second
438 * frame. We know doing the second will always work
439 * because we reserve space above. We prefer appending
440 * as this typically has better DMA alignment properties.
441 */
442 for (m = m1; m->m_next != NULL; m = m->m_next)
443 ;
444 pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len;
445 if (pad) {
446 if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */
447 m2->m_data -= pad;
448 m2->m_len += pad;
449 m2->m_pkthdr.len += pad;
450 } else { /* append to first */
451 m->m_len += pad;
452 m1->m_pkthdr.len += pad;
453 }
454 }
455
456 /*
457 * Now, stick 'em together and prepend the tunnel headers;
458 * first the Atheros tunnel header (all zero for now) and
459 * then a special fast frame LLC.
460 *
461 * XXX optimize by prepending together
462 */
463 m->m_next = m2; /* NB: last mbuf from above */
464 m1->m_pkthdr.len += m2->m_pkthdr.len;
465 M_PREPEND(m1, sizeof(uint32_t)+2, M_NOWAIT);
466 if (m1 == NULL) { /* XXX cannot happen */
467 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
468 "%s: no space for tunnel header\n", __func__);
469 vap->iv_stats.is_tx_nobuf++;
470 return NULL;
471 }
472 memset(mtod(m1, void *), 0, sizeof(uint32_t)+2);
473
474 M_PREPEND(m1, sizeof(struct llc), M_NOWAIT);
475 if (m1 == NULL) { /* XXX cannot happen */
476 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
477 "%s: no space for llc header\n", __func__);
478 vap->iv_stats.is_tx_nobuf++;
479 return NULL;
480 }
481 llc = mtod(m1, struct llc *);
482 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
483 llc->llc_control = LLC_UI;
484 llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0;
485 llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1;
486 llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2;
487 llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE);
488
489 vap->iv_stats.is_ff_encap++;
490
491 return m1;
492bad:
493 if (m1 != NULL)
494 m_freem(m1);
495 if (m2 != NULL)
496 m_freem(m2);
497 return NULL;
498}
499
500static void
501ff_transmit(struct ieee80211_node *ni, struct mbuf *m)
502{
503 struct ieee80211vap *vap = ni->ni_vap;
504 struct ieee80211com *ic = ni->ni_ic;
505 int error;
506
507 IEEE80211_TX_LOCK_ASSERT(vap->iv_ic);
508
509 /* encap and xmit */
510 m = ieee80211_encap(vap, ni, m);
511 if (m != NULL) {
512 struct ifnet *ifp = vap->iv_ifp;
513
|
515 if (error != 0) {
516 /* NB: IFQ_HANDOFF reclaims mbuf */
517 ieee80211_free_node(ni);
518 } else {
519 ifp->if_opackets++;
520 }
521 } else
522 ieee80211_free_node(ni);
523}
524
525/*
526 * Flush frames to device; note we re-use the linked list
527 * the frames were stored on and use the sentinel (unchanged)
528 * which may be non-NULL.
529 */
530static void
531ff_flush(struct mbuf *head, struct mbuf *last)
532{
533 struct mbuf *m, *next;
534 struct ieee80211_node *ni;
535 struct ieee80211vap *vap;
536
537 for (m = head; m != last; m = next) {
538 next = m->m_nextpkt;
539 m->m_nextpkt = NULL;
540
541 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
542 vap = ni->ni_vap;
543
544 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
545 "%s: flush frame, age %u", __func__, M_AGE_GET(m));
546 vap->iv_stats.is_ff_flush++;
547
548 ff_transmit(ni, m);
549 }
550}
551
552/*
553 * Age frames on the staging queue.
554 *
555 * This is called without the comlock held, but it does all its work
556 * behind the comlock. Because of this, it's possible that the
557 * staging queue will be serviced between the function which called
558 * it and now; thus simply checking that the queue has work in it
559 * may fail.
560 *
561 * See PR kern/174283 for more details.
562 */
563void
564ieee80211_ff_age(struct ieee80211com *ic, struct ieee80211_stageq *sq,
565 int quanta)
566{
567 struct mbuf *m, *head;
568 struct ieee80211_node *ni;
569 struct ieee80211_tx_ampdu *tap;
570
571#if 0
572 KASSERT(sq->head != NULL, ("stageq empty"));
573#endif
574
575 IEEE80211_LOCK(ic);
576 head = sq->head;
577 while ((m = sq->head) != NULL && M_AGE_GET(m) < quanta) {
578 int tid = WME_AC_TO_TID(M_WME_GETAC(m));
579
580 /* clear tap ref to frame */
581 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
582 tap = &ni->ni_tx_ampdu[tid];
583 KASSERT(tap->txa_private == m, ("staging queue empty"));
584 tap->txa_private = NULL;
585
586 sq->head = m->m_nextpkt;
587 sq->depth--;
588 }
589 if (m == NULL)
590 sq->tail = NULL;
591 else
592 M_AGE_SUB(m, quanta);
593 IEEE80211_UNLOCK(ic);
594
595 IEEE80211_TX_LOCK(ic);
596 ff_flush(head, m);
597 IEEE80211_TX_UNLOCK(ic);
598}
599
600static void
601stageq_add(struct ieee80211com *ic, struct ieee80211_stageq *sq, struct mbuf *m)
602{
603 int age = ieee80211_ffagemax;
604
605 IEEE80211_LOCK_ASSERT(ic);
606
607 if (sq->tail != NULL) {
608 sq->tail->m_nextpkt = m;
609 age -= M_AGE_GET(sq->head);
610 } else
611 sq->head = m;
612 KASSERT(age >= 0, ("age %d", age));
613 M_AGE_SET(m, age);
614 m->m_nextpkt = NULL;
615 sq->tail = m;
616 sq->depth++;
617}
618
619static void
620stageq_remove(struct ieee80211com *ic, struct ieee80211_stageq *sq, struct mbuf *mstaged)
621{
622 struct mbuf *m, *mprev;
623
624 IEEE80211_LOCK_ASSERT(ic);
625
626 mprev = NULL;
627 for (m = sq->head; m != NULL; m = m->m_nextpkt) {
628 if (m == mstaged) {
629 if (mprev == NULL)
630 sq->head = m->m_nextpkt;
631 else
632 mprev->m_nextpkt = m->m_nextpkt;
633 if (sq->tail == m)
634 sq->tail = mprev;
635 sq->depth--;
636 return;
637 }
638 mprev = m;
639 }
640 printf("%s: packet not found\n", __func__);
641}
642
643static uint32_t
644ff_approx_txtime(struct ieee80211_node *ni,
645 const struct mbuf *m1, const struct mbuf *m2)
646{
647 struct ieee80211com *ic = ni->ni_ic;
648 struct ieee80211vap *vap = ni->ni_vap;
649 uint32_t framelen;
650
651 /*
652 * Approximate the frame length to be transmitted. A swag to add
653 * the following maximal values to the skb payload:
654 * - 32: 802.11 encap + CRC
655 * - 24: encryption overhead (if wep bit)
656 * - 4 + 6: fast-frame header and padding
657 * - 16: 2 LLC FF tunnel headers
658 * - 14: 1 802.3 FF tunnel header (mbuf already accounts for 2nd)
659 */
660 framelen = m1->m_pkthdr.len + 32 +
661 ATH_FF_MAX_HDR_PAD + ATH_FF_MAX_SEP_PAD + ATH_FF_MAX_HDR;
662 if (vap->iv_flags & IEEE80211_F_PRIVACY)
663 framelen += 24;
664 if (m2 != NULL)
665 framelen += m2->m_pkthdr.len;
666 return ieee80211_compute_duration(ic->ic_rt, framelen, ni->ni_txrate, 0);
667}
668
669/*
670 * Check if the supplied frame can be partnered with an existing
671 * or pending frame. Return a reference to any frame that should be
672 * sent on return; otherwise return NULL.
673 */
674struct mbuf *
675ieee80211_ff_check(struct ieee80211_node *ni, struct mbuf *m)
676{
677 struct ieee80211vap *vap = ni->ni_vap;
678 struct ieee80211com *ic = ni->ni_ic;
679 struct ieee80211_superg *sg = ic->ic_superg;
680 const int pri = M_WME_GETAC(m);
681 struct ieee80211_stageq *sq;
682 struct ieee80211_tx_ampdu *tap;
683 struct mbuf *mstaged;
684 uint32_t txtime, limit;
685
686 IEEE80211_TX_UNLOCK_ASSERT(ic);
687
688 /*
689 * Check if the supplied frame can be aggregated.
690 *
691 * NB: we allow EAPOL frames to be aggregated with other ucast traffic.
692 * Do 802.1x EAPOL frames proceed in the clear? Then they couldn't
693 * be aggregated with other types of frames when encryption is on?
694 */
695 IEEE80211_LOCK(ic);
696 tap = &ni->ni_tx_ampdu[WME_AC_TO_TID(pri)];
697 mstaged = tap->txa_private; /* NB: we reuse AMPDU state */
698 ieee80211_txampdu_count_packet(tap);
699
700 /*
701 * When not in station mode never aggregate a multicast
702 * frame; this insures, for example, that a combined frame
703 * does not require multiple encryption keys.
704 */
705 if (vap->iv_opmode != IEEE80211_M_STA &&
706 ETHER_IS_MULTICAST(mtod(m, struct ether_header *)->ether_dhost)) {
707 /* XXX flush staged frame? */
708 IEEE80211_UNLOCK(ic);
709 return m;
710 }
711 /*
712 * If there is no frame to combine with and the pps is
713 * too low; then do not attempt to aggregate this frame.
714 */
715 if (mstaged == NULL &&
716 ieee80211_txampdu_getpps(tap) < ieee80211_ffppsmin) {
717 IEEE80211_UNLOCK(ic);
718 return m;
719 }
720 sq = &sg->ff_stageq[pri];
721 /*
722 * Check the txop limit to insure the aggregate fits.
723 */
724 limit = IEEE80211_TXOP_TO_US(
725 ic->ic_wme.wme_chanParams.cap_wmeParams[pri].wmep_txopLimit);
726 if (limit != 0 &&
727 (txtime = ff_approx_txtime(ni, m, mstaged)) > limit) {
728 /*
729 * Aggregate too long, return to the caller for direct
730 * transmission. In addition, flush any pending frame
731 * before sending this one.
732 */
733 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
734 "%s: txtime %u exceeds txop limit %u\n",
735 __func__, txtime, limit);
736
737 tap->txa_private = NULL;
738 if (mstaged != NULL)
739 stageq_remove(ic, sq, mstaged);
740 IEEE80211_UNLOCK(ic);
741
742 if (mstaged != NULL) {
743 IEEE80211_TX_LOCK(ic);
744 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
745 "%s: flush staged frame", __func__);
746 /* encap and xmit */
747 ff_transmit(ni, mstaged);
748 IEEE80211_TX_UNLOCK(ic);
749 }
750 return m; /* NB: original frame */
751 }
752 /*
753 * An aggregation candidate. If there's a frame to partner
754 * with then combine and return for processing. Otherwise
755 * save this frame and wait for a partner to show up (or
756 * the frame to be flushed). Note that staged frames also
757 * hold their node reference.
758 */
759 if (mstaged != NULL) {
760 tap->txa_private = NULL;
761 stageq_remove(ic, sq, mstaged);
762 IEEE80211_UNLOCK(ic);
763
764 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
765 "%s: aggregate fast-frame", __func__);
766 /*
767 * Release the node reference; we only need
768 * the one already in mstaged.
769 */
770 KASSERT(mstaged->m_pkthdr.rcvif == (void *)ni,
771 ("rcvif %p ni %p", mstaged->m_pkthdr.rcvif, ni));
772 ieee80211_free_node(ni);
773
774 m->m_nextpkt = NULL;
775 mstaged->m_nextpkt = m;
776 mstaged->m_flags |= M_FF; /* NB: mark for encap work */
777 } else {
778 KASSERT(tap->txa_private == NULL,
779 ("txa_private %p", tap->txa_private));
780 tap->txa_private = m;
781
782 stageq_add(ic, sq, m);
783 IEEE80211_UNLOCK(ic);
784
785 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
786 "%s: stage frame, %u queued", __func__, sq->depth);
787 /* NB: mstaged is NULL */
788 }
789 return mstaged;
790}
791
792void
793ieee80211_ff_node_init(struct ieee80211_node *ni)
794{
795 /*
796 * Clean FF state on re-associate. This handles the case
797 * where a station leaves w/o notifying us and then returns
798 * before node is reaped for inactivity.
799 */
800 ieee80211_ff_node_cleanup(ni);
801}
802
803void
804ieee80211_ff_node_cleanup(struct ieee80211_node *ni)
805{
806 struct ieee80211com *ic = ni->ni_ic;
807 struct ieee80211_superg *sg = ic->ic_superg;
808 struct ieee80211_tx_ampdu *tap;
809 struct mbuf *m, *next_m, *head;
810 int tid;
811
812 IEEE80211_LOCK(ic);
813 head = NULL;
814 for (tid = 0; tid < WME_NUM_TID; tid++) {
815 int ac = TID_TO_WME_AC(tid);
816
817 tap = &ni->ni_tx_ampdu[tid];
818 m = tap->txa_private;
819 if (m != NULL) {
820 tap->txa_private = NULL;
821 stageq_remove(ic, &sg->ff_stageq[ac], m);
822 m->m_nextpkt = head;
823 head = m;
824 }
825 }
826 IEEE80211_UNLOCK(ic);
827
828 /*
829 * Free mbufs, taking care to not dereference the mbuf after
830 * we free it (hence grabbing m_nextpkt before we free it.)
831 */
832 m = head;
833 while (m != NULL) {
834 next_m = m->m_nextpkt;
835 m_freem(m);
836 ieee80211_free_node(ni);
837 m = next_m;
838 }
839}
840
841/*
842 * Switch between turbo and non-turbo operating modes.
843 * Use the specified channel flags to locate the new
844 * channel, update 802.11 state, and then call back into
845 * the driver to effect the change.
846 */
847void
848ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags)
849{
850 struct ieee80211com *ic = vap->iv_ic;
851 struct ieee80211_channel *chan;
852
853 chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags);
854 if (chan == NULL) { /* XXX should not happen */
855 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
856 "%s: no channel with freq %u flags 0x%x\n",
857 __func__, ic->ic_bsschan->ic_freq, newflags);
858 return;
859 }
860
861 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
862 "%s: %s -> %s (freq %u flags 0x%x)\n", __func__,
863 ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)],
864 ieee80211_phymode_name[ieee80211_chan2mode(chan)],
865 chan->ic_freq, chan->ic_flags);
866
867 ic->ic_bsschan = chan;
868 ic->ic_prevchan = ic->ic_curchan;
869 ic->ic_curchan = chan;
870 ic->ic_rt = ieee80211_get_ratetable(chan);
871 ic->ic_set_channel(ic);
872 ieee80211_radiotap_chan_change(ic);
873 /* NB: do not need to reset ERP state 'cuz we're in sta mode */
874}
875
876/*
877 * Return the current ``state'' of an Atheros capbility.
878 * If associated in station mode report the negotiated
879 * setting. Otherwise report the current setting.
880 */
881static int
882getathcap(struct ieee80211vap *vap, int cap)
883{
884 if (vap->iv_opmode == IEEE80211_M_STA &&
885 vap->iv_state == IEEE80211_S_RUN)
886 return IEEE80211_ATH_CAP(vap, vap->iv_bss, cap) != 0;
887 else
888 return (vap->iv_flags & cap) != 0;
889}
890
891static int
892superg_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
893{
894 switch (ireq->i_type) {
895 case IEEE80211_IOC_FF:
896 ireq->i_val = getathcap(vap, IEEE80211_F_FF);
897 break;
898 case IEEE80211_IOC_TURBOP:
899 ireq->i_val = getathcap(vap, IEEE80211_F_TURBOP);
900 break;
901 default:
902 return ENOSYS;
903 }
904 return 0;
905}
906IEEE80211_IOCTL_GET(superg, superg_ioctl_get80211);
907
908static int
909superg_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
910{
911 switch (ireq->i_type) {
912 case IEEE80211_IOC_FF:
913 if (ireq->i_val) {
914 if ((vap->iv_caps & IEEE80211_C_FF) == 0)
915 return EOPNOTSUPP;
916 vap->iv_flags |= IEEE80211_F_FF;
917 } else
918 vap->iv_flags &= ~IEEE80211_F_FF;
919 return ENETRESET;
920 case IEEE80211_IOC_TURBOP:
921 if (ireq->i_val) {
922 if ((vap->iv_caps & IEEE80211_C_TURBOP) == 0)
923 return EOPNOTSUPP;
924 vap->iv_flags |= IEEE80211_F_TURBOP;
925 } else
926 vap->iv_flags &= ~IEEE80211_F_TURBOP;
927 return ENETRESET;
928 default:
929 return ENOSYS;
930 }
931 return 0;
932}
933IEEE80211_IOCTL_SET(superg, superg_ioctl_set80211);
934
935#endif /* IEEE80211_SUPPORT_SUPERG */
| 515 if (error != 0) {
516 /* NB: IFQ_HANDOFF reclaims mbuf */
517 ieee80211_free_node(ni);
518 } else {
519 ifp->if_opackets++;
520 }
521 } else
522 ieee80211_free_node(ni);
523}
524
525/*
526 * Flush frames to device; note we re-use the linked list
527 * the frames were stored on and use the sentinel (unchanged)
528 * which may be non-NULL.
529 */
530static void
531ff_flush(struct mbuf *head, struct mbuf *last)
532{
533 struct mbuf *m, *next;
534 struct ieee80211_node *ni;
535 struct ieee80211vap *vap;
536
537 for (m = head; m != last; m = next) {
538 next = m->m_nextpkt;
539 m->m_nextpkt = NULL;
540
541 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
542 vap = ni->ni_vap;
543
544 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
545 "%s: flush frame, age %u", __func__, M_AGE_GET(m));
546 vap->iv_stats.is_ff_flush++;
547
548 ff_transmit(ni, m);
549 }
550}
551
552/*
553 * Age frames on the staging queue.
554 *
555 * This is called without the comlock held, but it does all its work
556 * behind the comlock. Because of this, it's possible that the
557 * staging queue will be serviced between the function which called
558 * it and now; thus simply checking that the queue has work in it
559 * may fail.
560 *
561 * See PR kern/174283 for more details.
562 */
563void
564ieee80211_ff_age(struct ieee80211com *ic, struct ieee80211_stageq *sq,
565 int quanta)
566{
567 struct mbuf *m, *head;
568 struct ieee80211_node *ni;
569 struct ieee80211_tx_ampdu *tap;
570
571#if 0
572 KASSERT(sq->head != NULL, ("stageq empty"));
573#endif
574
575 IEEE80211_LOCK(ic);
576 head = sq->head;
577 while ((m = sq->head) != NULL && M_AGE_GET(m) < quanta) {
578 int tid = WME_AC_TO_TID(M_WME_GETAC(m));
579
580 /* clear tap ref to frame */
581 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
582 tap = &ni->ni_tx_ampdu[tid];
583 KASSERT(tap->txa_private == m, ("staging queue empty"));
584 tap->txa_private = NULL;
585
586 sq->head = m->m_nextpkt;
587 sq->depth--;
588 }
589 if (m == NULL)
590 sq->tail = NULL;
591 else
592 M_AGE_SUB(m, quanta);
593 IEEE80211_UNLOCK(ic);
594
595 IEEE80211_TX_LOCK(ic);
596 ff_flush(head, m);
597 IEEE80211_TX_UNLOCK(ic);
598}
599
600static void
601stageq_add(struct ieee80211com *ic, struct ieee80211_stageq *sq, struct mbuf *m)
602{
603 int age = ieee80211_ffagemax;
604
605 IEEE80211_LOCK_ASSERT(ic);
606
607 if (sq->tail != NULL) {
608 sq->tail->m_nextpkt = m;
609 age -= M_AGE_GET(sq->head);
610 } else
611 sq->head = m;
612 KASSERT(age >= 0, ("age %d", age));
613 M_AGE_SET(m, age);
614 m->m_nextpkt = NULL;
615 sq->tail = m;
616 sq->depth++;
617}
618
619static void
620stageq_remove(struct ieee80211com *ic, struct ieee80211_stageq *sq, struct mbuf *mstaged)
621{
622 struct mbuf *m, *mprev;
623
624 IEEE80211_LOCK_ASSERT(ic);
625
626 mprev = NULL;
627 for (m = sq->head; m != NULL; m = m->m_nextpkt) {
628 if (m == mstaged) {
629 if (mprev == NULL)
630 sq->head = m->m_nextpkt;
631 else
632 mprev->m_nextpkt = m->m_nextpkt;
633 if (sq->tail == m)
634 sq->tail = mprev;
635 sq->depth--;
636 return;
637 }
638 mprev = m;
639 }
640 printf("%s: packet not found\n", __func__);
641}
642
643static uint32_t
644ff_approx_txtime(struct ieee80211_node *ni,
645 const struct mbuf *m1, const struct mbuf *m2)
646{
647 struct ieee80211com *ic = ni->ni_ic;
648 struct ieee80211vap *vap = ni->ni_vap;
649 uint32_t framelen;
650
651 /*
652 * Approximate the frame length to be transmitted. A swag to add
653 * the following maximal values to the skb payload:
654 * - 32: 802.11 encap + CRC
655 * - 24: encryption overhead (if wep bit)
656 * - 4 + 6: fast-frame header and padding
657 * - 16: 2 LLC FF tunnel headers
658 * - 14: 1 802.3 FF tunnel header (mbuf already accounts for 2nd)
659 */
660 framelen = m1->m_pkthdr.len + 32 +
661 ATH_FF_MAX_HDR_PAD + ATH_FF_MAX_SEP_PAD + ATH_FF_MAX_HDR;
662 if (vap->iv_flags & IEEE80211_F_PRIVACY)
663 framelen += 24;
664 if (m2 != NULL)
665 framelen += m2->m_pkthdr.len;
666 return ieee80211_compute_duration(ic->ic_rt, framelen, ni->ni_txrate, 0);
667}
668
669/*
670 * Check if the supplied frame can be partnered with an existing
671 * or pending frame. Return a reference to any frame that should be
672 * sent on return; otherwise return NULL.
673 */
674struct mbuf *
675ieee80211_ff_check(struct ieee80211_node *ni, struct mbuf *m)
676{
677 struct ieee80211vap *vap = ni->ni_vap;
678 struct ieee80211com *ic = ni->ni_ic;
679 struct ieee80211_superg *sg = ic->ic_superg;
680 const int pri = M_WME_GETAC(m);
681 struct ieee80211_stageq *sq;
682 struct ieee80211_tx_ampdu *tap;
683 struct mbuf *mstaged;
684 uint32_t txtime, limit;
685
686 IEEE80211_TX_UNLOCK_ASSERT(ic);
687
688 /*
689 * Check if the supplied frame can be aggregated.
690 *
691 * NB: we allow EAPOL frames to be aggregated with other ucast traffic.
692 * Do 802.1x EAPOL frames proceed in the clear? Then they couldn't
693 * be aggregated with other types of frames when encryption is on?
694 */
695 IEEE80211_LOCK(ic);
696 tap = &ni->ni_tx_ampdu[WME_AC_TO_TID(pri)];
697 mstaged = tap->txa_private; /* NB: we reuse AMPDU state */
698 ieee80211_txampdu_count_packet(tap);
699
700 /*
701 * When not in station mode never aggregate a multicast
702 * frame; this insures, for example, that a combined frame
703 * does not require multiple encryption keys.
704 */
705 if (vap->iv_opmode != IEEE80211_M_STA &&
706 ETHER_IS_MULTICAST(mtod(m, struct ether_header *)->ether_dhost)) {
707 /* XXX flush staged frame? */
708 IEEE80211_UNLOCK(ic);
709 return m;
710 }
711 /*
712 * If there is no frame to combine with and the pps is
713 * too low; then do not attempt to aggregate this frame.
714 */
715 if (mstaged == NULL &&
716 ieee80211_txampdu_getpps(tap) < ieee80211_ffppsmin) {
717 IEEE80211_UNLOCK(ic);
718 return m;
719 }
720 sq = &sg->ff_stageq[pri];
721 /*
722 * Check the txop limit to insure the aggregate fits.
723 */
724 limit = IEEE80211_TXOP_TO_US(
725 ic->ic_wme.wme_chanParams.cap_wmeParams[pri].wmep_txopLimit);
726 if (limit != 0 &&
727 (txtime = ff_approx_txtime(ni, m, mstaged)) > limit) {
728 /*
729 * Aggregate too long, return to the caller for direct
730 * transmission. In addition, flush any pending frame
731 * before sending this one.
732 */
733 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
734 "%s: txtime %u exceeds txop limit %u\n",
735 __func__, txtime, limit);
736
737 tap->txa_private = NULL;
738 if (mstaged != NULL)
739 stageq_remove(ic, sq, mstaged);
740 IEEE80211_UNLOCK(ic);
741
742 if (mstaged != NULL) {
743 IEEE80211_TX_LOCK(ic);
744 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
745 "%s: flush staged frame", __func__);
746 /* encap and xmit */
747 ff_transmit(ni, mstaged);
748 IEEE80211_TX_UNLOCK(ic);
749 }
750 return m; /* NB: original frame */
751 }
752 /*
753 * An aggregation candidate. If there's a frame to partner
754 * with then combine and return for processing. Otherwise
755 * save this frame and wait for a partner to show up (or
756 * the frame to be flushed). Note that staged frames also
757 * hold their node reference.
758 */
759 if (mstaged != NULL) {
760 tap->txa_private = NULL;
761 stageq_remove(ic, sq, mstaged);
762 IEEE80211_UNLOCK(ic);
763
764 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
765 "%s: aggregate fast-frame", __func__);
766 /*
767 * Release the node reference; we only need
768 * the one already in mstaged.
769 */
770 KASSERT(mstaged->m_pkthdr.rcvif == (void *)ni,
771 ("rcvif %p ni %p", mstaged->m_pkthdr.rcvif, ni));
772 ieee80211_free_node(ni);
773
774 m->m_nextpkt = NULL;
775 mstaged->m_nextpkt = m;
776 mstaged->m_flags |= M_FF; /* NB: mark for encap work */
777 } else {
778 KASSERT(tap->txa_private == NULL,
779 ("txa_private %p", tap->txa_private));
780 tap->txa_private = m;
781
782 stageq_add(ic, sq, m);
783 IEEE80211_UNLOCK(ic);
784
785 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
786 "%s: stage frame, %u queued", __func__, sq->depth);
787 /* NB: mstaged is NULL */
788 }
789 return mstaged;
790}
791
792void
793ieee80211_ff_node_init(struct ieee80211_node *ni)
794{
795 /*
796 * Clean FF state on re-associate. This handles the case
797 * where a station leaves w/o notifying us and then returns
798 * before node is reaped for inactivity.
799 */
800 ieee80211_ff_node_cleanup(ni);
801}
802
803void
804ieee80211_ff_node_cleanup(struct ieee80211_node *ni)
805{
806 struct ieee80211com *ic = ni->ni_ic;
807 struct ieee80211_superg *sg = ic->ic_superg;
808 struct ieee80211_tx_ampdu *tap;
809 struct mbuf *m, *next_m, *head;
810 int tid;
811
812 IEEE80211_LOCK(ic);
813 head = NULL;
814 for (tid = 0; tid < WME_NUM_TID; tid++) {
815 int ac = TID_TO_WME_AC(tid);
816
817 tap = &ni->ni_tx_ampdu[tid];
818 m = tap->txa_private;
819 if (m != NULL) {
820 tap->txa_private = NULL;
821 stageq_remove(ic, &sg->ff_stageq[ac], m);
822 m->m_nextpkt = head;
823 head = m;
824 }
825 }
826 IEEE80211_UNLOCK(ic);
827
828 /*
829 * Free mbufs, taking care to not dereference the mbuf after
830 * we free it (hence grabbing m_nextpkt before we free it.)
831 */
832 m = head;
833 while (m != NULL) {
834 next_m = m->m_nextpkt;
835 m_freem(m);
836 ieee80211_free_node(ni);
837 m = next_m;
838 }
839}
840
841/*
842 * Switch between turbo and non-turbo operating modes.
843 * Use the specified channel flags to locate the new
844 * channel, update 802.11 state, and then call back into
845 * the driver to effect the change.
846 */
847void
848ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags)
849{
850 struct ieee80211com *ic = vap->iv_ic;
851 struct ieee80211_channel *chan;
852
853 chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags);
854 if (chan == NULL) { /* XXX should not happen */
855 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
856 "%s: no channel with freq %u flags 0x%x\n",
857 __func__, ic->ic_bsschan->ic_freq, newflags);
858 return;
859 }
860
861 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
862 "%s: %s -> %s (freq %u flags 0x%x)\n", __func__,
863 ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)],
864 ieee80211_phymode_name[ieee80211_chan2mode(chan)],
865 chan->ic_freq, chan->ic_flags);
866
867 ic->ic_bsschan = chan;
868 ic->ic_prevchan = ic->ic_curchan;
869 ic->ic_curchan = chan;
870 ic->ic_rt = ieee80211_get_ratetable(chan);
871 ic->ic_set_channel(ic);
872 ieee80211_radiotap_chan_change(ic);
873 /* NB: do not need to reset ERP state 'cuz we're in sta mode */
874}
875
876/*
877 * Return the current ``state'' of an Atheros capbility.
878 * If associated in station mode report the negotiated
879 * setting. Otherwise report the current setting.
880 */
881static int
882getathcap(struct ieee80211vap *vap, int cap)
883{
884 if (vap->iv_opmode == IEEE80211_M_STA &&
885 vap->iv_state == IEEE80211_S_RUN)
886 return IEEE80211_ATH_CAP(vap, vap->iv_bss, cap) != 0;
887 else
888 return (vap->iv_flags & cap) != 0;
889}
890
891static int
892superg_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
893{
894 switch (ireq->i_type) {
895 case IEEE80211_IOC_FF:
896 ireq->i_val = getathcap(vap, IEEE80211_F_FF);
897 break;
898 case IEEE80211_IOC_TURBOP:
899 ireq->i_val = getathcap(vap, IEEE80211_F_TURBOP);
900 break;
901 default:
902 return ENOSYS;
903 }
904 return 0;
905}
906IEEE80211_IOCTL_GET(superg, superg_ioctl_get80211);
907
908static int
909superg_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
910{
911 switch (ireq->i_type) {
912 case IEEE80211_IOC_FF:
913 if (ireq->i_val) {
914 if ((vap->iv_caps & IEEE80211_C_FF) == 0)
915 return EOPNOTSUPP;
916 vap->iv_flags |= IEEE80211_F_FF;
917 } else
918 vap->iv_flags &= ~IEEE80211_F_FF;
919 return ENETRESET;
920 case IEEE80211_IOC_TURBOP:
921 if (ireq->i_val) {
922 if ((vap->iv_caps & IEEE80211_C_TURBOP) == 0)
923 return EOPNOTSUPP;
924 vap->iv_flags |= IEEE80211_F_TURBOP;
925 } else
926 vap->iv_flags &= ~IEEE80211_F_TURBOP;
927 return ENETRESET;
928 default:
929 return ENOSYS;
930 }
931 return 0;
932}
933IEEE80211_IOCTL_SET(superg, superg_ioctl_set80211);
934
935#endif /* IEEE80211_SUPPORT_SUPERG */
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