ieee80211_superg.c revision 191541
1190391Ssam/*- 2190391Ssam * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3190391Ssam * All rights reserved. 4190391Ssam * 5190391Ssam * Redistribution and use in source and binary forms, with or without 6190391Ssam * modification, are permitted provided that the following conditions 7190391Ssam * are met: 8190391Ssam * 1. Redistributions of source code must retain the above copyright 9190391Ssam * notice, this list of conditions and the following disclaimer. 10190391Ssam * 2. Redistributions in binary form must reproduce the above copyright 11190391Ssam * notice, this list of conditions and the following disclaimer in the 12190391Ssam * documentation and/or other materials provided with the distribution. 13190391Ssam * 14190391Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15190391Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16190391Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17190391Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18190391Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19190391Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20190391Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21190391Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22190391Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23190391Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24190391Ssam */ 25190391Ssam 26190391Ssam#include <sys/cdefs.h> 27190391Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_superg.c 191541 2009-04-26 21:21:07Z sam $"); 28190391Ssam 29190391Ssam#include "opt_wlan.h" 30190391Ssam 31190391Ssam#include <sys/param.h> 32190391Ssam#include <sys/systm.h> 33190391Ssam#include <sys/mbuf.h> 34190391Ssam#include <sys/kernel.h> 35190391Ssam#include <sys/endian.h> 36190391Ssam 37190391Ssam#include <sys/socket.h> 38190391Ssam 39190391Ssam#include <net/bpf.h> 40190391Ssam#include <net/ethernet.h> 41190391Ssam#include <net/if.h> 42190391Ssam#include <net/if_llc.h> 43190391Ssam#include <net/if_media.h> 44190391Ssam 45190391Ssam#include <net80211/ieee80211_var.h> 46190391Ssam#include <net80211/ieee80211_input.h> 47190391Ssam#include <net80211/ieee80211_phy.h> 48190391Ssam#include <net80211/ieee80211_superg.h> 49190391Ssam 50190455Ssam/* 51190455Ssam * Atheros fast-frame encapsulation format. 52190455Ssam * FF max payload: 53190455Ssam * 802.2 + FFHDR + HPAD + 802.3 + 802.2 + 1500 + SPAD + 802.3 + 802.2 + 1500: 54190455Ssam * 8 + 4 + 4 + 14 + 8 + 1500 + 6 + 14 + 8 + 1500 55190455Ssam * = 3066 56190455Ssam */ 57190455Ssam/* fast frame header is 32-bits */ 58190455Ssam#define ATH_FF_PROTO 0x0000003f /* protocol */ 59190455Ssam#define ATH_FF_PROTO_S 0 60190455Ssam#define ATH_FF_FTYPE 0x000000c0 /* frame type */ 61190455Ssam#define ATH_FF_FTYPE_S 6 62190455Ssam#define ATH_FF_HLEN32 0x00000300 /* optional hdr length */ 63190455Ssam#define ATH_FF_HLEN32_S 8 64190455Ssam#define ATH_FF_SEQNUM 0x001ffc00 /* sequence number */ 65190455Ssam#define ATH_FF_SEQNUM_S 10 66190455Ssam#define ATH_FF_OFFSET 0xffe00000 /* offset to 2nd payload */ 67190455Ssam#define ATH_FF_OFFSET_S 21 68190455Ssam 69190455Ssam#define ATH_FF_MAX_HDR_PAD 4 70190455Ssam#define ATH_FF_MAX_SEP_PAD 6 71190455Ssam#define ATH_FF_MAX_HDR 30 72190455Ssam 73190455Ssam#define ATH_FF_PROTO_L2TUNNEL 0 /* L2 tunnel protocol */ 74190455Ssam#define ATH_FF_ETH_TYPE 0x88bd /* Ether type for encapsulated frames */ 75190455Ssam#define ATH_FF_SNAP_ORGCODE_0 0x00 76190455Ssam#define ATH_FF_SNAP_ORGCODE_1 0x03 77190455Ssam#define ATH_FF_SNAP_ORGCODE_2 0x7f 78190455Ssam 79190579Ssam#define ATH_FF_TXQMIN 2 /* min txq depth for staging */ 80190579Ssam#define ATH_FF_TXQMAX 50 /* maximum # of queued frames allowed */ 81190579Ssam#define ATH_FF_STAGEMAX 5 /* max waiting period for staged frame*/ 82190579Ssam 83190391Ssam#define ETHER_HEADER_COPY(dst, src) \ 84190391Ssam memcpy(dst, src, sizeof(struct ether_header)) 85190391Ssam 86190579Ssam/* XXX public for sysctl hookup */ 87190579Ssamint ieee80211_ffppsmin = 2; /* pps threshold for ff aggregation */ 88190579Ssamint ieee80211_ffagemax = -1; /* max time frames held on stage q */ 89190579Ssam 90190391Ssamvoid 91190391Ssamieee80211_superg_attach(struct ieee80211com *ic) 92190391Ssam{ 93190579Ssam ieee80211_ffagemax = msecs_to_ticks(150); 94190391Ssam} 95190391Ssam 96190391Ssamvoid 97190391Ssamieee80211_superg_detach(struct ieee80211com *ic) 98190391Ssam{ 99190391Ssam} 100190391Ssam 101190391Ssamvoid 102190391Ssamieee80211_superg_vattach(struct ieee80211vap *vap) 103190391Ssam{ 104190391Ssam if (vap->iv_caps & IEEE80211_C_FF) 105190391Ssam vap->iv_flags |= IEEE80211_F_FF; 106190450Ssam /* NB: we only implement sta mode */ 107190450Ssam if (vap->iv_opmode == IEEE80211_M_STA && 108190450Ssam (vap->iv_caps & IEEE80211_C_TURBOP)) 109190391Ssam vap->iv_flags |= IEEE80211_F_TURBOP; 110190391Ssam} 111190391Ssam 112190391Ssamvoid 113190391Ssamieee80211_superg_vdetach(struct ieee80211vap *vap) 114190391Ssam{ 115190391Ssam} 116190391Ssam 117190391Ssam#define ATH_OUI_BYTES 0x00, 0x03, 0x7f 118190391Ssam/* 119190391Ssam * Add a WME information element to a frame. 120190391Ssam */ 121190391Ssamuint8_t * 122190451Ssamieee80211_add_ath(uint8_t *frm, uint8_t caps, ieee80211_keyix defkeyix) 123190391Ssam{ 124190391Ssam static const struct ieee80211_ath_ie info = { 125190391Ssam .ath_id = IEEE80211_ELEMID_VENDOR, 126190391Ssam .ath_len = sizeof(struct ieee80211_ath_ie) - 2, 127190391Ssam .ath_oui = { ATH_OUI_BYTES }, 128190391Ssam .ath_oui_type = ATH_OUI_TYPE, 129190391Ssam .ath_oui_subtype= ATH_OUI_SUBTYPE, 130190391Ssam .ath_version = ATH_OUI_VERSION, 131190391Ssam }; 132190391Ssam struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm; 133190391Ssam 134190391Ssam memcpy(frm, &info, sizeof(info)); 135190391Ssam ath->ath_capability = caps; 136190451Ssam if (defkeyix != IEEE80211_KEYIX_NONE) { 137190451Ssam ath->ath_defkeyix[0] = (defkeyix & 0xff); 138190451Ssam ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff); 139190451Ssam } else { 140190451Ssam ath->ath_defkeyix[0] = 0xff; 141190451Ssam ath->ath_defkeyix[1] = 0x7f; 142190451Ssam } 143190391Ssam return frm + sizeof(info); 144190391Ssam} 145190391Ssam#undef ATH_OUI_BYTES 146190391Ssam 147190451Ssamuint8_t * 148190451Ssamieee80211_add_athcaps(uint8_t *frm, const struct ieee80211_node *bss) 149190451Ssam{ 150190451Ssam const struct ieee80211vap *vap = bss->ni_vap; 151190451Ssam 152190451Ssam return ieee80211_add_ath(frm, 153190451Ssam vap->iv_flags & IEEE80211_F_ATHEROS, 154190451Ssam ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 155190451Ssam bss->ni_authmode != IEEE80211_AUTH_8021X) ? 156190451Ssam vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 157190451Ssam} 158190451Ssam 159190391Ssamvoid 160190391Ssamieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie) 161190391Ssam{ 162190391Ssam const struct ieee80211_ath_ie *ath = 163190391Ssam (const struct ieee80211_ath_ie *) ie; 164190391Ssam 165190391Ssam ni->ni_ath_flags = ath->ath_capability; 166190391Ssam ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix); 167190391Ssam} 168190391Ssam 169190391Ssamint 170190391Ssamieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm, 171190391Ssam const struct ieee80211_frame *wh) 172190391Ssam{ 173190391Ssam struct ieee80211vap *vap = ni->ni_vap; 174190391Ssam const struct ieee80211_ath_ie *ath; 175190391Ssam u_int len = frm[1]; 176190391Ssam int capschanged; 177190391Ssam uint16_t defkeyix; 178190391Ssam 179190391Ssam if (len < sizeof(struct ieee80211_ath_ie)-2) { 180190391Ssam IEEE80211_DISCARD_IE(vap, 181190391Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_SUPERG, 182190391Ssam wh, "Atheros", "too short, len %u", len); 183190391Ssam return -1; 184190391Ssam } 185190391Ssam ath = (const struct ieee80211_ath_ie *)frm; 186190391Ssam capschanged = (ni->ni_ath_flags != ath->ath_capability); 187190391Ssam defkeyix = LE_READ_2(ath->ath_defkeyix); 188190391Ssam if (capschanged || defkeyix != ni->ni_ath_defkeyix) { 189190391Ssam ni->ni_ath_flags = ath->ath_capability; 190190391Ssam ni->ni_ath_defkeyix = defkeyix; 191190391Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni, 192190391Ssam "ath ie change: new caps 0x%x defkeyix 0x%x", 193190391Ssam ni->ni_ath_flags, ni->ni_ath_defkeyix); 194190391Ssam } 195190391Ssam if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) { 196190391Ssam uint16_t curflags, newflags; 197190391Ssam 198190391Ssam /* 199190391Ssam * Check for turbo mode switch. Calculate flags 200190391Ssam * for the new mode and effect the switch. 201190391Ssam */ 202190391Ssam newflags = curflags = vap->iv_ic->ic_bsschan->ic_flags; 203190391Ssam /* NB: BOOST is not in ic_flags, so get it from the ie */ 204190391Ssam if (ath->ath_capability & ATHEROS_CAP_BOOST) 205190391Ssam newflags |= IEEE80211_CHAN_TURBO; 206190391Ssam else 207190391Ssam newflags &= ~IEEE80211_CHAN_TURBO; 208190391Ssam if (newflags != curflags) 209190391Ssam ieee80211_dturbo_switch(vap, newflags); 210190391Ssam } 211190391Ssam return capschanged; 212190391Ssam} 213190391Ssam 214190391Ssam/* 215190391Ssam * Decap the encapsulated frame pair and dispatch the first 216190391Ssam * for delivery. The second frame is returned for delivery 217190391Ssam * via the normal path. 218190391Ssam */ 219190391Ssamstruct mbuf * 220190391Ssamieee80211_ff_decap(struct ieee80211_node *ni, struct mbuf *m) 221190391Ssam{ 222190391Ssam#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc)) 223190391Ssam#define MS(x,f) (((x) & f) >> f##_S) 224190391Ssam struct ieee80211vap *vap = ni->ni_vap; 225190391Ssam struct llc *llc; 226190391Ssam uint32_t ath; 227190391Ssam struct mbuf *n; 228190391Ssam int framelen; 229190391Ssam 230190391Ssam /* NB: we assume caller does this check for us */ 231190391Ssam KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF), 232190391Ssam ("ff not negotiated")); 233190391Ssam /* 234190391Ssam * Check for fast-frame tunnel encapsulation. 235190391Ssam */ 236190391Ssam if (m->m_pkthdr.len < 3*FF_LLC_SIZE) 237190391Ssam return m; 238190391Ssam if (m->m_len < FF_LLC_SIZE && 239190391Ssam (m = m_pullup(m, FF_LLC_SIZE)) == NULL) { 240190391Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 241190391Ssam ni->ni_macaddr, "fast-frame", 242190391Ssam "%s", "m_pullup(llc) failed"); 243190391Ssam vap->iv_stats.is_rx_tooshort++; 244190391Ssam return NULL; 245190391Ssam } 246190391Ssam llc = (struct llc *)(mtod(m, uint8_t *) + 247190391Ssam sizeof(struct ether_header)); 248190391Ssam if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE)) 249190391Ssam return m; 250190391Ssam m_adj(m, FF_LLC_SIZE); 251190391Ssam m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath); 252190391Ssam if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) { 253190391Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 254190391Ssam ni->ni_macaddr, "fast-frame", 255190391Ssam "unsupport tunnel protocol, header 0x%x", ath); 256190391Ssam vap->iv_stats.is_ff_badhdr++; 257190391Ssam m_freem(m); 258190391Ssam return NULL; 259190391Ssam } 260190391Ssam /* NB: skip header and alignment padding */ 261190391Ssam m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2); 262190391Ssam 263190391Ssam vap->iv_stats.is_ff_decap++; 264190391Ssam 265190391Ssam /* 266190391Ssam * Decap the first frame, bust it apart from the 267190391Ssam * second and deliver; then decap the second frame 268190391Ssam * and return it to the caller for normal delivery. 269190391Ssam */ 270190391Ssam m = ieee80211_decap1(m, &framelen); 271190391Ssam if (m == NULL) { 272190391Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 273190391Ssam ni->ni_macaddr, "fast-frame", "%s", "first decap failed"); 274190391Ssam vap->iv_stats.is_ff_tooshort++; 275190391Ssam return NULL; 276190391Ssam } 277190391Ssam n = m_split(m, framelen, M_NOWAIT); 278190391Ssam if (n == NULL) { 279190391Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 280190391Ssam ni->ni_macaddr, "fast-frame", 281190391Ssam "%s", "unable to split encapsulated frames"); 282190391Ssam vap->iv_stats.is_ff_split++; 283190391Ssam m_freem(m); /* NB: must reclaim */ 284190391Ssam return NULL; 285190391Ssam } 286190391Ssam /* XXX not right for WDS */ 287190391Ssam vap->iv_deliver_data(vap, ni, m); /* 1st of pair */ 288190391Ssam 289190391Ssam /* 290190391Ssam * Decap second frame. 291190391Ssam */ 292190391Ssam m_adj(n, roundup2(framelen, 4) - framelen); /* padding */ 293190391Ssam n = ieee80211_decap1(n, &framelen); 294190391Ssam if (n == NULL) { 295190391Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 296190391Ssam ni->ni_macaddr, "fast-frame", "%s", "second decap failed"); 297190391Ssam vap->iv_stats.is_ff_tooshort++; 298190391Ssam } 299190391Ssam /* XXX verify framelen against mbuf contents */ 300190391Ssam return n; /* 2nd delivered by caller */ 301190391Ssam#undef MS 302190391Ssam#undef FF_LLC_SIZE 303190391Ssam} 304190391Ssam 305190391Ssam/* 306190391Ssam * Do Ethernet-LLC encapsulation for each payload in a fast frame 307190391Ssam * tunnel encapsulation. The frame is assumed to have an Ethernet 308190391Ssam * header at the front that must be stripped before prepending the 309190391Ssam * LLC followed by the Ethernet header passed in (with an Ethernet 310190391Ssam * type that specifies the payload size). 311190391Ssam */ 312190391Ssamstatic struct mbuf * 313190391Ssamff_encap1(struct ieee80211vap *vap, struct mbuf *m, 314190391Ssam const struct ether_header *eh) 315190391Ssam{ 316190391Ssam struct llc *llc; 317190391Ssam uint16_t payload; 318190391Ssam 319190391Ssam /* XXX optimize by combining m_adj+M_PREPEND */ 320190391Ssam m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 321190391Ssam llc = mtod(m, struct llc *); 322190391Ssam llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 323190391Ssam llc->llc_control = LLC_UI; 324190391Ssam llc->llc_snap.org_code[0] = 0; 325190391Ssam llc->llc_snap.org_code[1] = 0; 326190391Ssam llc->llc_snap.org_code[2] = 0; 327190391Ssam llc->llc_snap.ether_type = eh->ether_type; 328190391Ssam payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */ 329190391Ssam 330190391Ssam M_PREPEND(m, sizeof(struct ether_header), M_DONTWAIT); 331190391Ssam if (m == NULL) { /* XXX cannot happen */ 332190391Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 333190391Ssam "%s: no space for ether_header\n", __func__); 334190391Ssam vap->iv_stats.is_tx_nobuf++; 335190391Ssam return NULL; 336190391Ssam } 337190391Ssam ETHER_HEADER_COPY(mtod(m, void *), eh); 338190391Ssam mtod(m, struct ether_header *)->ether_type = htons(payload); 339190391Ssam return m; 340190391Ssam} 341190391Ssam 342190391Ssam/* 343190391Ssam * Fast frame encapsulation. There must be two packets 344190391Ssam * chained with m_nextpkt. We do header adjustment for 345190391Ssam * each, add the tunnel encapsulation, and then concatenate 346190391Ssam * the mbuf chains to form a single frame for transmission. 347190391Ssam */ 348190391Ssamstruct mbuf * 349190391Ssamieee80211_ff_encap(struct ieee80211vap *vap, struct mbuf *m1, int hdrspace, 350190391Ssam struct ieee80211_key *key) 351190391Ssam{ 352190391Ssam struct mbuf *m2; 353190391Ssam struct ether_header eh1, eh2; 354190391Ssam struct llc *llc; 355190391Ssam struct mbuf *m; 356190391Ssam int pad; 357190391Ssam 358190391Ssam m2 = m1->m_nextpkt; 359190391Ssam if (m2 == NULL) { 360190391Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 361190391Ssam "%s: only one frame\n", __func__); 362190391Ssam goto bad; 363190391Ssam } 364190391Ssam m1->m_nextpkt = NULL; 365190391Ssam /* 366190579Ssam * Include fast frame headers in adjusting header layout. 367190391Ssam */ 368190579Ssam KASSERT(m1->m_len >= sizeof(eh1), ("no ethernet header!")); 369190579Ssam ETHER_HEADER_COPY(&eh1, mtod(m1, caddr_t)); 370190391Ssam m1 = ieee80211_mbuf_adjust(vap, 371190391Ssam hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 + 372190391Ssam sizeof(struct ether_header), 373190391Ssam key, m1); 374190391Ssam if (m1 == NULL) { 375190391Ssam /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 376190391Ssam m_freem(m2); 377190391Ssam goto bad; 378190391Ssam } 379190391Ssam 380190391Ssam /* 381190391Ssam * Copy second frame's Ethernet header out of line 382190391Ssam * and adjust for encapsulation headers. Note that 383190391Ssam * we make room for padding in case there isn't room 384190391Ssam * at the end of first frame. 385190391Ssam */ 386190391Ssam KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!")); 387190391Ssam ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t)); 388190391Ssam m2 = ieee80211_mbuf_adjust(vap, 389190391Ssam ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header), 390190391Ssam NULL, m2); 391190391Ssam if (m2 == NULL) { 392190391Ssam /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 393190391Ssam goto bad; 394190391Ssam } 395190391Ssam 396190391Ssam /* 397190391Ssam * Now do tunnel encapsulation. First, each 398190391Ssam * frame gets a standard encapsulation. 399190391Ssam */ 400190391Ssam m1 = ff_encap1(vap, m1, &eh1); 401190391Ssam if (m1 == NULL) 402190391Ssam goto bad; 403190391Ssam m2 = ff_encap1(vap, m2, &eh2); 404190391Ssam if (m2 == NULL) 405190391Ssam goto bad; 406190391Ssam 407190391Ssam /* 408190391Ssam * Pad leading frame to a 4-byte boundary. If there 409190391Ssam * is space at the end of the first frame, put it 410190391Ssam * there; otherwise prepend to the front of the second 411190391Ssam * frame. We know doing the second will always work 412190391Ssam * because we reserve space above. We prefer appending 413190391Ssam * as this typically has better DMA alignment properties. 414190391Ssam */ 415190391Ssam for (m = m1; m->m_next != NULL; m = m->m_next) 416190391Ssam ; 417190391Ssam pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len; 418190391Ssam if (pad) { 419190391Ssam if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */ 420190391Ssam m2->m_data -= pad; 421190391Ssam m2->m_len += pad; 422190391Ssam m2->m_pkthdr.len += pad; 423190391Ssam } else { /* append to first */ 424190391Ssam m->m_len += pad; 425190391Ssam m1->m_pkthdr.len += pad; 426190391Ssam } 427190391Ssam } 428190391Ssam 429190391Ssam /* 430190391Ssam * Now, stick 'em together and prepend the tunnel headers; 431190391Ssam * first the Atheros tunnel header (all zero for now) and 432190391Ssam * then a special fast frame LLC. 433190391Ssam * 434190391Ssam * XXX optimize by prepending together 435190391Ssam */ 436190391Ssam m->m_next = m2; /* NB: last mbuf from above */ 437190391Ssam m1->m_pkthdr.len += m2->m_pkthdr.len; 438190391Ssam M_PREPEND(m1, sizeof(uint32_t)+2, M_DONTWAIT); 439190391Ssam if (m1 == NULL) { /* XXX cannot happen */ 440190391Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 441190391Ssam "%s: no space for tunnel header\n", __func__); 442190391Ssam vap->iv_stats.is_tx_nobuf++; 443190391Ssam return NULL; 444190391Ssam } 445190391Ssam memset(mtod(m1, void *), 0, sizeof(uint32_t)+2); 446190391Ssam 447190391Ssam M_PREPEND(m1, sizeof(struct llc), M_DONTWAIT); 448190391Ssam if (m1 == NULL) { /* XXX cannot happen */ 449190391Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 450190391Ssam "%s: no space for llc header\n", __func__); 451190391Ssam vap->iv_stats.is_tx_nobuf++; 452190391Ssam return NULL; 453190391Ssam } 454190391Ssam llc = mtod(m1, struct llc *); 455190391Ssam llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 456190391Ssam llc->llc_control = LLC_UI; 457190391Ssam llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0; 458190391Ssam llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1; 459190391Ssam llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2; 460190391Ssam llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE); 461190391Ssam 462190391Ssam vap->iv_stats.is_ff_encap++; 463190391Ssam 464190391Ssam return m1; 465190391Ssambad: 466190391Ssam if (m1 != NULL) 467190391Ssam m_freem(m1); 468190391Ssam if (m2 != NULL) 469190391Ssam m_freem(m2); 470190391Ssam return NULL; 471190391Ssam} 472190391Ssam 473190579Ssamstatic void 474190579Ssamff_transmit(struct ieee80211_node *ni, struct mbuf *m) 475190579Ssam{ 476190579Ssam struct ieee80211vap *vap = ni->ni_vap; 477190579Ssam int error; 478190579Ssam 479190579Ssam /* encap and xmit */ 480190579Ssam m = ieee80211_encap(vap, ni, m); 481190579Ssam if (m != NULL) { 482190579Ssam struct ifnet *ifp = vap->iv_ifp; 483190579Ssam struct ifnet *parent = ni->ni_ic->ic_ifp; 484190579Ssam 485191541Ssam if (bpf_peers_present(vap->iv_rawbpf)) 486191541Ssam bpf_mtap(vap->iv_rawbpf, m); 487191541Ssam 488190579Ssam error = parent->if_transmit(parent, m); 489190579Ssam if (error != 0) { 490190579Ssam /* NB: IFQ_HANDOFF reclaims mbuf */ 491190579Ssam ieee80211_free_node(ni); 492190579Ssam } else { 493190579Ssam ifp->if_opackets++; 494190579Ssam } 495190579Ssam } else 496190579Ssam ieee80211_free_node(ni); 497190579Ssam} 498190579Ssam 499190391Ssam/* 500190579Ssam * Flush frames to device; note we re-use the linked list 501190579Ssam * the frames were stored on and use the sentinel (unchanged) 502190579Ssam * which may be non-NULL. 503190579Ssam */ 504190579Ssamstatic void 505190579Ssamff_flush(struct mbuf *head, struct mbuf *last) 506190579Ssam{ 507190579Ssam struct mbuf *m, *next; 508190579Ssam struct ieee80211_node *ni; 509190579Ssam struct ieee80211vap *vap; 510190579Ssam 511190579Ssam for (m = head; m != last; m = next) { 512190579Ssam next = m->m_nextpkt; 513190579Ssam m->m_nextpkt = NULL; 514190579Ssam 515190579Ssam ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 516190579Ssam vap = ni->ni_vap; 517190579Ssam 518190579Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni, 519190579Ssam "%s: flush frame, age %u", __func__, M_AGE_GET(m)); 520190579Ssam vap->iv_stats.is_ff_flush++; 521190579Ssam 522190579Ssam ff_transmit(ni, m); 523190579Ssam } 524190579Ssam} 525190579Ssam 526190579Ssam/* 527190579Ssam * Age frames on the staging queue. 528190579Ssam */ 529190579Ssamvoid 530190579Ssamieee80211_ff_age(struct ieee80211com *ic, struct ieee80211_stageq *sq, int quanta) 531190579Ssam{ 532190579Ssam struct mbuf *m, *head; 533190579Ssam struct ieee80211_node *ni; 534190579Ssam struct ieee80211_tx_ampdu *tap; 535190579Ssam 536190579Ssam KASSERT(sq->head != NULL, ("stageq empty")); 537190579Ssam 538190579Ssam IEEE80211_LOCK(ic); 539190579Ssam head = sq->head; 540190579Ssam while ((m = sq->head) != NULL && M_AGE_GET(m) < quanta) { 541190579Ssam /* clear tap ref to frame */ 542190579Ssam ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 543190579Ssam tap = &ni->ni_tx_ampdu[M_WME_GETAC(m)]; 544190579Ssam KASSERT(tap->txa_private == m, ("staging queue empty")); 545190579Ssam tap->txa_private = NULL; 546190579Ssam 547190579Ssam sq->head = m->m_nextpkt; 548190579Ssam sq->depth--; 549190579Ssam ic->ic_stageqdepth--; 550190579Ssam } 551190579Ssam if (m == NULL) 552190579Ssam sq->tail = NULL; 553190579Ssam else 554190579Ssam M_AGE_SUB(m, quanta); 555190579Ssam IEEE80211_UNLOCK(ic); 556190579Ssam 557190579Ssam ff_flush(head, m); 558190579Ssam} 559190579Ssam 560190579Ssamstatic void 561190579Ssamstageq_add(struct ieee80211_stageq *sq, struct mbuf *m) 562190579Ssam{ 563190579Ssam int age = ieee80211_ffagemax; 564190579Ssam if (sq->tail != NULL) { 565190579Ssam sq->tail->m_nextpkt = m; 566190579Ssam age -= M_AGE_GET(sq->head); 567190579Ssam } else 568190579Ssam sq->head = m; 569190579Ssam KASSERT(age >= 0, ("age %d", age)); 570190579Ssam M_AGE_SET(m, age); 571190579Ssam m->m_nextpkt = NULL; 572190579Ssam sq->tail = m; 573190579Ssam sq->depth++; 574190579Ssam} 575190579Ssam 576190579Ssamstatic void 577190579Ssamstageq_remove(struct ieee80211_stageq *sq, struct mbuf *mstaged) 578190579Ssam{ 579190579Ssam struct mbuf *m, *mprev; 580190579Ssam 581190579Ssam mprev = NULL; 582190579Ssam for (m = sq->head; m != NULL; m = m->m_nextpkt) { 583190579Ssam if (m == mstaged) { 584190579Ssam if (mprev == NULL) 585190579Ssam sq->head = m->m_nextpkt; 586190579Ssam else 587190579Ssam mprev->m_nextpkt = m->m_nextpkt; 588190579Ssam if (sq->tail == m) 589190579Ssam sq->tail = mprev; 590190579Ssam sq->depth--; 591190579Ssam return; 592190579Ssam } 593190579Ssam mprev = m; 594190579Ssam } 595190579Ssam printf("%s: packet not found\n", __func__); 596190579Ssam} 597190579Ssam 598190579Ssamstatic uint32_t 599190579Ssamff_approx_txtime(struct ieee80211_node *ni, 600190579Ssam const struct mbuf *m1, const struct mbuf *m2) 601190579Ssam{ 602190579Ssam struct ieee80211com *ic = ni->ni_ic; 603190579Ssam struct ieee80211vap *vap = ni->ni_vap; 604190579Ssam uint32_t framelen; 605190579Ssam 606190579Ssam /* 607190579Ssam * Approximate the frame length to be transmitted. A swag to add 608190579Ssam * the following maximal values to the skb payload: 609190579Ssam * - 32: 802.11 encap + CRC 610190579Ssam * - 24: encryption overhead (if wep bit) 611190579Ssam * - 4 + 6: fast-frame header and padding 612190579Ssam * - 16: 2 LLC FF tunnel headers 613190579Ssam * - 14: 1 802.3 FF tunnel header (mbuf already accounts for 2nd) 614190579Ssam */ 615190579Ssam framelen = m1->m_pkthdr.len + 32 + 616190579Ssam ATH_FF_MAX_HDR_PAD + ATH_FF_MAX_SEP_PAD + ATH_FF_MAX_HDR; 617190579Ssam if (vap->iv_flags & IEEE80211_F_PRIVACY) 618190579Ssam framelen += 24; 619190579Ssam if (m2 != NULL) 620190579Ssam framelen += m2->m_pkthdr.len; 621190579Ssam return ieee80211_compute_duration(ic->ic_rt, framelen, ni->ni_txrate, 0); 622190579Ssam} 623190579Ssam 624190579Ssam/* 625190579Ssam * Check if the supplied frame can be partnered with an existing 626190579Ssam * or pending frame. Return a reference to any frame that should be 627190579Ssam * sent on return; otherwise return NULL. 628190579Ssam */ 629190579Ssamstruct mbuf * 630190579Ssamieee80211_ff_check(struct ieee80211_node *ni, struct mbuf *m) 631190579Ssam{ 632190579Ssam struct ieee80211vap *vap = ni->ni_vap; 633190579Ssam struct ieee80211com *ic = ni->ni_ic; 634190579Ssam const int pri = M_WME_GETAC(m); 635190579Ssam struct ieee80211_stageq *sq; 636190579Ssam struct ieee80211_tx_ampdu *tap; 637190579Ssam struct mbuf *mstaged; 638190579Ssam uint32_t txtime, limit; 639190579Ssam 640190579Ssam /* 641190579Ssam * Check if the supplied frame can be aggregated. 642190579Ssam * 643190579Ssam * NB: we allow EAPOL frames to be aggregated with other ucast traffic. 644190579Ssam * Do 802.1x EAPOL frames proceed in the clear? Then they couldn't 645190579Ssam * be aggregated with other types of frames when encryption is on? 646190579Ssam */ 647190579Ssam IEEE80211_LOCK(ic); 648190579Ssam tap = &ni->ni_tx_ampdu[pri]; 649190579Ssam mstaged = tap->txa_private; /* NB: we reuse AMPDU state */ 650190579Ssam ieee80211_txampdu_count_packet(tap); 651190579Ssam 652190579Ssam /* 653190579Ssam * When not in station mode never aggregate a multicast 654190579Ssam * frame; this insures, for example, that a combined frame 655190579Ssam * does not require multiple encryption keys. 656190579Ssam */ 657190579Ssam if (vap->iv_opmode != IEEE80211_M_STA && 658190579Ssam ETHER_IS_MULTICAST(mtod(m, struct ether_header *)->ether_dhost)) { 659190579Ssam /* XXX flush staged frame? */ 660190579Ssam IEEE80211_UNLOCK(ic); 661190579Ssam return m; 662190579Ssam } 663190579Ssam /* 664190579Ssam * If there is no frame to combine with and the pps is 665190579Ssam * too low; then do not attempt to aggregate this frame. 666190579Ssam */ 667190579Ssam if (mstaged == NULL && 668190579Ssam ieee80211_txampdu_getpps(tap) < ieee80211_ffppsmin) { 669190579Ssam IEEE80211_UNLOCK(ic); 670190579Ssam return m; 671190579Ssam } 672190579Ssam sq = &ic->ic_ff_stageq[pri]; 673190579Ssam /* 674190579Ssam * Check the txop limit to insure the aggregate fits. 675190579Ssam */ 676190579Ssam limit = IEEE80211_TXOP_TO_US( 677190579Ssam ic->ic_wme.wme_chanParams.cap_wmeParams[pri].wmep_txopLimit); 678190579Ssam if (limit != 0 && 679190579Ssam (txtime = ff_approx_txtime(ni, m, mstaged)) > limit) { 680190579Ssam /* 681190579Ssam * Aggregate too long, return to the caller for direct 682190579Ssam * transmission. In addition, flush any pending frame 683190579Ssam * before sending this one. 684190579Ssam */ 685190579Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 686190579Ssam "%s: txtime %u exceeds txop limit %u\n", 687190579Ssam __func__, txtime, limit); 688190579Ssam 689190579Ssam tap->txa_private = NULL; 690190579Ssam if (mstaged != NULL) 691190579Ssam stageq_remove(sq, mstaged); 692190579Ssam IEEE80211_UNLOCK(ic); 693190579Ssam 694190579Ssam if (mstaged != NULL) { 695190579Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni, 696190579Ssam "%s: flush staged frame", __func__); 697190579Ssam /* encap and xmit */ 698190579Ssam ff_transmit(ni, mstaged); 699190579Ssam } 700190579Ssam return m; /* NB: original frame */ 701190579Ssam } 702190579Ssam /* 703190579Ssam * An aggregation candidate. If there's a frame to partner 704190579Ssam * with then combine and return for processing. Otherwise 705190579Ssam * save this frame and wait for a partner to show up (or 706190579Ssam * the frame to be flushed). Note that staged frames also 707190579Ssam * hold their node reference. 708190579Ssam */ 709190579Ssam if (mstaged != NULL) { 710190579Ssam tap->txa_private = NULL; 711190579Ssam stageq_remove(sq, mstaged); 712190579Ssam IEEE80211_UNLOCK(ic); 713190579Ssam 714190579Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni, 715190579Ssam "%s: aggregate fast-frame", __func__); 716190579Ssam /* 717190579Ssam * Release the node reference; we only need 718190579Ssam * the one already in mstaged. 719190579Ssam */ 720190579Ssam KASSERT(mstaged->m_pkthdr.rcvif == (void *)ni, 721190579Ssam ("rcvif %p ni %p", mstaged->m_pkthdr.rcvif, ni)); 722190579Ssam ieee80211_free_node(ni); 723190579Ssam 724190579Ssam m->m_nextpkt = NULL; 725190579Ssam mstaged->m_nextpkt = m; 726190579Ssam mstaged->m_flags |= M_FF; /* NB: mark for encap work */ 727190579Ssam } else { 728190579Ssam m->m_pkthdr.rcvif = (void *)ni; /* NB: hold node reference */ 729190579Ssam 730190579Ssam KASSERT(tap->txa_private == NULL, 731190579Ssam ("txa_private %p", tap->txa_private)); 732190579Ssam tap->txa_private = m; 733190579Ssam 734190579Ssam stageq_add(sq, m); 735190579Ssam ic->ic_stageqdepth++; 736190579Ssam IEEE80211_UNLOCK(ic); 737190579Ssam 738190579Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni, 739190579Ssam "%s: stage frame, %u queued", __func__, sq->depth); 740190579Ssam /* NB: mstaged is NULL */ 741190579Ssam } 742190579Ssam return mstaged; 743190579Ssam} 744190579Ssam 745190579Ssamvoid 746190579Ssamieee80211_ff_node_init(struct ieee80211_node *ni) 747190579Ssam{ 748190579Ssam /* 749190579Ssam * Clean FF state on re-associate. This handles the case 750190579Ssam * where a station leaves w/o notifying us and then returns 751190579Ssam * before node is reaped for inactivity. 752190579Ssam */ 753190579Ssam ieee80211_ff_node_cleanup(ni); 754190579Ssam} 755190579Ssam 756190579Ssamvoid 757190579Ssamieee80211_ff_node_cleanup(struct ieee80211_node *ni) 758190579Ssam{ 759190579Ssam struct ieee80211com *ic = ni->ni_ic; 760190579Ssam struct ieee80211_tx_ampdu *tap; 761190579Ssam struct mbuf *m, *head; 762190579Ssam int ac; 763190579Ssam 764190579Ssam IEEE80211_LOCK(ic); 765190579Ssam head = NULL; 766190579Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 767190579Ssam tap = &ni->ni_tx_ampdu[ac]; 768190579Ssam m = tap->txa_private; 769190579Ssam if (m != NULL) { 770190579Ssam tap->txa_private = NULL; 771190579Ssam stageq_remove(&ic->ic_ff_stageq[ac], m); 772190579Ssam m->m_nextpkt = head; 773190579Ssam head = m; 774190579Ssam } 775190579Ssam } 776190579Ssam IEEE80211_UNLOCK(ic); 777190579Ssam 778190579Ssam for (m = head; m != NULL; m = m->m_nextpkt) { 779190579Ssam m_freem(m); 780190579Ssam ieee80211_free_node(ni); 781190579Ssam } 782190579Ssam} 783190579Ssam 784190579Ssam/* 785190391Ssam * Switch between turbo and non-turbo operating modes. 786190391Ssam * Use the specified channel flags to locate the new 787190391Ssam * channel, update 802.11 state, and then call back into 788190391Ssam * the driver to effect the change. 789190391Ssam */ 790190391Ssamvoid 791190391Ssamieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags) 792190391Ssam{ 793190391Ssam struct ieee80211com *ic = vap->iv_ic; 794190391Ssam struct ieee80211_channel *chan; 795190391Ssam 796190391Ssam chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags); 797190391Ssam if (chan == NULL) { /* XXX should not happen */ 798190391Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 799190391Ssam "%s: no channel with freq %u flags 0x%x\n", 800190391Ssam __func__, ic->ic_bsschan->ic_freq, newflags); 801190391Ssam return; 802190391Ssam } 803190391Ssam 804190391Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 805190391Ssam "%s: %s -> %s (freq %u flags 0x%x)\n", __func__, 806190391Ssam ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)], 807190391Ssam ieee80211_phymode_name[ieee80211_chan2mode(chan)], 808190391Ssam chan->ic_freq, chan->ic_flags); 809190391Ssam 810190391Ssam ic->ic_bsschan = chan; 811190391Ssam ic->ic_prevchan = ic->ic_curchan; 812190391Ssam ic->ic_curchan = chan; 813190532Ssam ic->ic_rt = ieee80211_get_ratetable(chan); 814190391Ssam ic->ic_set_channel(ic); 815190391Ssam /* NB: do not need to reset ERP state 'cuz we're in sta mode */ 816190391Ssam} 817190391Ssam 818190391Ssam/* 819190391Ssam * Return the current ``state'' of an Atheros capbility. 820190391Ssam * If associated in station mode report the negotiated 821190391Ssam * setting. Otherwise report the current setting. 822190391Ssam */ 823190391Ssamstatic int 824190391Ssamgetathcap(struct ieee80211vap *vap, int cap) 825190391Ssam{ 826190391Ssam if (vap->iv_opmode == IEEE80211_M_STA && 827190391Ssam vap->iv_state == IEEE80211_S_RUN) 828190391Ssam return IEEE80211_ATH_CAP(vap, vap->iv_bss, cap) != 0; 829190391Ssam else 830190391Ssam return (vap->iv_flags & cap) != 0; 831190391Ssam} 832190391Ssam 833190391Ssamstatic int 834190391Ssamsuperg_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 835190391Ssam{ 836190391Ssam switch (ireq->i_type) { 837190391Ssam case IEEE80211_IOC_FF: 838190391Ssam ireq->i_val = getathcap(vap, IEEE80211_F_FF); 839190391Ssam break; 840190391Ssam case IEEE80211_IOC_TURBOP: 841190391Ssam ireq->i_val = getathcap(vap, IEEE80211_F_TURBOP); 842190391Ssam break; 843190391Ssam default: 844190391Ssam return ENOSYS; 845190391Ssam } 846190391Ssam return 0; 847190391Ssam} 848190391SsamIEEE80211_IOCTL_GET(superg, superg_ioctl_get80211); 849190391Ssam 850190391Ssamstatic int 851190391Ssamsuperg_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 852190391Ssam{ 853190391Ssam switch (ireq->i_type) { 854190391Ssam case IEEE80211_IOC_FF: 855190391Ssam if (ireq->i_val) { 856190391Ssam if ((vap->iv_caps & IEEE80211_C_FF) == 0) 857190391Ssam return EOPNOTSUPP; 858190391Ssam vap->iv_flags |= IEEE80211_F_FF; 859190391Ssam } else 860190391Ssam vap->iv_flags &= ~IEEE80211_F_FF; 861190530Ssam return ENETRESET; 862190391Ssam case IEEE80211_IOC_TURBOP: 863190391Ssam if (ireq->i_val) { 864190391Ssam if ((vap->iv_caps & IEEE80211_C_TURBOP) == 0) 865190391Ssam return EOPNOTSUPP; 866190391Ssam vap->iv_flags |= IEEE80211_F_TURBOP; 867190391Ssam } else 868190391Ssam vap->iv_flags &= ~IEEE80211_F_TURBOP; 869190391Ssam return ENETRESET; 870190391Ssam default: 871190391Ssam return ENOSYS; 872190391Ssam } 873190391Ssam return 0; 874190391Ssam} 875190391SsamIEEE80211_IOCTL_SET(superg, superg_ioctl_set80211); 876