/* * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * Copyright (c) 2007 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * IEEE 802.11n protocol support. */ #include #include #include #include "net80211_impl.h" /* define here, used throughout file */ #define MS(_v, _f) (((_v) & _f) >> _f##_S) #define SM(_v, _f) (((_v) << _f##_S) & _f) /* need max array size */ /* NB: these are for HT20 w/ long GI */ const int ieee80211_htrates[16] = { 13, /* IFM_IEEE80211_MCS0 */ 26, /* IFM_IEEE80211_MCS1 */ 39, /* IFM_IEEE80211_MCS2 */ 52, /* IFM_IEEE80211_MCS3 */ 78, /* IFM_IEEE80211_MCS4 */ 104, /* IFM_IEEE80211_MCS5 */ 117, /* IFM_IEEE80211_MCS6 */ 130, /* IFM_IEEE80211_MCS7 */ 26, /* IFM_IEEE80211_MCS8 */ 52, /* IFM_IEEE80211_MCS9 */ 78, /* IFM_IEEE80211_MCS10 */ 104, /* IFM_IEEE80211_MCS11 */ 156, /* IFM_IEEE80211_MCS12 */ 208, /* IFM_IEEE80211_MCS13 */ 234, /* IFM_IEEE80211_MCS14 */ 260, /* IFM_IEEE80211_MCS15 */ }; struct ieee80211_htrateset ieee80211_rateset_11n = { 16, { /* MCS: 6.5 13 19.5 26 39 52 58.5 65 13 26 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, /* 39 52 78 104 117, 130 */ 10, 11, 12, 13, 14, 15 } }; #define IEEE80211_AMPDU_AGE #define IEEE80211_AGGR_TIMEOUT 250 /* msecs */ #define IEEE80211_AGGR_MINRETRY (10 * hz) /* ticks */ #define IEEE80211_AGGR_MAXTRIES 3 /* * Receive processing. */ /* * Decap the encapsulated A-MSDU frames and dispatch all but * the last for delivery. The last frame is returned for * delivery via the normal path. */ #define FF_LLC_SIZE \ (sizeof (struct ether_header) + sizeof (struct ieee80211_llc)) mblk_t * ieee80211_decap_amsdu(struct ieee80211_node *in, mblk_t *mp) { struct ieee80211com *ic = in->in_ic; struct ether_header *eh; struct ieee80211_frame *wh; int framelen, hdrspace; mblk_t *m0; /* all msdu has same ieee80211_frame header */ wh = (struct ieee80211_frame *)mp->b_rptr; hdrspace = ieee80211_hdrspace(ic, wh); mp->b_rptr += hdrspace; /* A-MSDU subframe follows */ for (;;) { /* * The frame has an 802.3 header followed by an 802.2 * LLC header. The encapsulated frame length is in the * first header type field; */ if (MBLKL(mp) < FF_LLC_SIZE) { ieee80211_err("too short, decap failed\n"); goto out; } /* * Decap frames, encapsulate to 802.11 frame then deliver. * 802.3 header is first (struct ether_header) * 802.2 header follows (struct ieee80211_llc) * data, msdu = llc + data */ eh = (struct ether_header *)mp->b_rptr; /* 802.2 header follows */ framelen = ntohs(eh->ether_type); /* llc + data */ m0 = allocb(hdrspace + framelen, BPRI_MED); if (m0 == NULL) { ieee80211_err("decap_msdu(): can't alloc mblk\n"); goto out; } (void) memcpy(m0->b_wptr, (uint8_t *)wh, hdrspace); m0->b_wptr += hdrspace; (void) memcpy(m0->b_wptr, mp->b_rptr + sizeof (struct ether_header), framelen); m0->b_wptr += framelen; ic->ic_stats.is_rx_frags++; ic->ic_stats.is_rx_bytes += MBLKL(m0); IEEE80211_UNLOCK(ic); mac_rx(ic->ic_mach, NULL, m0); /* deliver to mac */ IEEE80211_LOCK(ic); framelen += sizeof (struct ether_header); if (MBLKL(mp) == framelen) /* last, no padding */ goto out; /* * Remove frame contents; each intermediate frame * is required to be aligned to a 4-byte boundary. */ mp->b_rptr += roundup(framelen, 4); /* padding */ } out: freemsg(mp); return (NULL); /* none delivered by caller */ } #undef FF_LLC_SIZE /* * Start A-MPDU rx/re-order processing for the specified TID. */ static void ampdu_rx_start(struct ieee80211_rx_ampdu *rap, int bufsiz, int start) { (void) memset(rap, 0, sizeof (*rap)); rap->rxa_wnd = (bufsiz == 0) ? IEEE80211_AGGR_BAWMAX : min((uint16_t)bufsiz, IEEE80211_AGGR_BAWMAX); rap->rxa_start = (uint16_t)start; rap->rxa_flags |= IEEE80211_AGGR_XCHGPEND; } /* * Purge all frames in the A-MPDU re-order queue. */ static void ampdu_rx_purge(struct ieee80211_rx_ampdu *rap) { mblk_t *m; int i; for (i = 0; i < rap->rxa_wnd; i++) { m = rap->rxa_m[i]; if (m != NULL) { rap->rxa_m[i] = NULL; rap->rxa_qbytes -= MBLKL(m); freemsg(m); if (--rap->rxa_qframes == 0) break; } } ASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0); } /* * Stop A-MPDU rx processing for the specified TID. */ static void ampdu_rx_stop(struct ieee80211_rx_ampdu *rap) { rap->rxa_flags &= ~IEEE80211_AGGR_XCHGPEND; ampdu_rx_purge(rap); } /* * Dispatch a frame from the A-MPDU reorder queue. The * frame is fed back into ieee80211_input marked with an * M_AMPDU flag so it doesn't come back to us (it also * permits ieee80211_input to optimize re-processing). */ static void ampdu_dispatch(struct ieee80211_node *in, mblk_t *m) { m->b_flag |= M_AMPDU; /* bypass normal processing */ /* NB: rssi and rstamp are ignored w/ M_AMPDU set */ (void) ieee80211_input(in->in_ic, m, in, 0, 0); } /* * Dispatch as many frames as possible from the re-order queue. * Frames will always be "at the front"; we process all frames * up to the first empty slot in the window. On completion we * cleanup state if there are still pending frames in the current * BA window. We assume the frame at slot 0 is already handled * by the caller; we always start at slot 1. */ static void ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *in) { mblk_t *m; int i; /* flush run of frames */ for (i = 1; i < rap->rxa_wnd; i++) { m = rap->rxa_m[i]; if (m == NULL) break; rap->rxa_m[i] = NULL; rap->rxa_qbytes -= MBLKL(m); rap->rxa_qframes--; ampdu_dispatch(in, m); } /* * If frames remain, copy the mbuf pointers down so * they correspond to the offsets in the new window. */ if (rap->rxa_qframes != 0) { int n = rap->rxa_qframes, j; for (j = i+1; j < rap->rxa_wnd; j++) { if (rap->rxa_m[j] != NULL) { rap->rxa_m[j-i] = rap->rxa_m[j]; rap->rxa_m[j] = NULL; if (--n == 0) break; } } ASSERT(n == 0); } /* * Adjust the start of the BA window to * reflect the frames just dispatched. */ rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); } #ifdef IEEE80211_AMPDU_AGE /* * Dispatch all frames in the A-MPDU re-order queue. */ static void ampdu_rx_flush(struct ieee80211_node *in, struct ieee80211_rx_ampdu *rap) { mblk_t *m; int i; ieee80211_dbg(IEEE80211_MSG_HT, "ampdu_rx_flush(%d)\n", rap->rxa_wnd); for (i = 0; i < rap->rxa_wnd; i++) { m = rap->rxa_m[i]; if (m == NULL) continue; rap->rxa_m[i] = NULL; rap->rxa_qbytes -= MBLKL(m); rap->rxa_qframes--; ampdu_dispatch(in, m); if (rap->rxa_qframes == 0) break; } } #endif /* IEEE80211_AMPDU_AGE */ /* * Dispatch all frames in the A-MPDU re-order queue * preceding the specified sequence number. This logic * handles window moves due to a received MSDU or BAR. */ static void ampdu_rx_flush_upto(struct ieee80211_node *in, struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) { mblk_t *m; ieee80211_seq seqno; int i; /* * Flush any complete MSDU's with a sequence number lower * than winstart. Gaps may exist. Note that we may actually * dispatch frames past winstart if a run continues; this is * an optimization that avoids having to do a separate pass * to dispatch frames after moving the BA window start. */ seqno = rap->rxa_start; for (i = 0; i < rap->rxa_wnd; i++) { m = rap->rxa_m[i]; if (m != NULL) { rap->rxa_m[i] = NULL; rap->rxa_qbytes -= MBLKL(m); rap->rxa_qframes--; ampdu_dispatch(in, m); } else { if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) break; } seqno = IEEE80211_SEQ_INC(seqno); } /* * If frames remain, copy the mbuf pointers down so * they correspond to the offsets in the new window. */ if (rap->rxa_qframes != 0) { int n = rap->rxa_qframes, j; for (j = i+1; j < rap->rxa_wnd; j++) { if (rap->rxa_m[j] != NULL) { rap->rxa_m[j-i] = rap->rxa_m[j]; rap->rxa_m[j] = NULL; if (--n == 0) break; } } if (n != 0) { ieee80211_dbg(IEEE80211_MSG_HT, "ampdu_rx_flush_upto(): " "lost %d frames, qframes %d off %d " "BA win <%d:%d> winstart %d\n", n, rap->rxa_qframes, i, rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), winstart); } } /* * Move the start of the BA window; we use the * sequence number of the last MSDU that was * passed up the stack+1 or winstart if stopped on * a gap in the reorder buffer. */ rap->rxa_start = seqno; } /* * Process a received QoS data frame for an HT station. Handle * A-MPDU reordering: if this frame is received out of order * and falls within the BA window hold onto it. Otherwise if * this frame completes a run, flush any pending frames. We * return 1 if the frame is consumed. A 0 is returned if * the frame should be processed normally by the caller. */ int ieee80211_ampdu_reorder(struct ieee80211_node *in, mblk_t *m) { #define IEEE80211_FC0_QOSDATA \ (IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS | \ IEEE80211_FC0_VERSION_0) #define PROCESS 0 /* caller should process frame */ #define CONSUMED 1 /* frame consumed, caller does nothing */ struct ieee80211_qosframe *wh; struct ieee80211_rx_ampdu *rap; ieee80211_seq rxseq; uint8_t tid; int off; ASSERT(in->in_flags & IEEE80211_NODE_HT); /* NB: m_len known to be sufficient */ wh = (struct ieee80211_qosframe *)m->b_rptr; ASSERT(wh->i_fc[0] == IEEE80211_FC0_QOSDATA); if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS) tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; else tid = wh->i_qos[0]; tid &= IEEE80211_QOS_TID; rap = &in->in_rx_ampdu[tid]; if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { /* * No ADDBA request yet, don't touch. */ return (PROCESS); } rxseq = LE_16(*(uint16_t *)wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; rap->rxa_nframes++; again: if (rxseq == rap->rxa_start) { /* * First frame in window. */ if (rap->rxa_qframes != 0) { /* * Dispatch as many packets as we can. */ ASSERT(rap->rxa_m[0] == NULL); /* [0] is m */ ampdu_dispatch(in, m); ampdu_rx_dispatch(rap, in); ieee80211_dbg(IEEE80211_MSG_HT, "ieee80211_ampdu_reorder(%u), CONSUMED ...\n", rap->rxa_qframes); return (CONSUMED); } else { /* * In order; advance window and notify * caller to dispatch directly. */ rap->rxa_start = IEEE80211_SEQ_INC(rxseq); ieee80211_dbg(IEEE80211_MSG_HT, "ieee80211_ampdu_reorder(%u), PROCESS ...\n", rap->rxa_start); return (PROCESS); } } ieee80211_dbg(IEEE80211_MSG_HT, "ieee80211_ampdu_reorder(%u, %u), out of order ...\n", rxseq, rap->rxa_start); /* * Frame is out of order; store if in the BA window. */ /* calculate offset in BA window */ off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); if (off < rap->rxa_wnd) { #ifdef IEEE80211_AMPDU_AGE /* * Common case (hopefully): in the BA window. * Sec 9.10.7.6 a) (D2.04 p.118 line 47) * -- * Check for frames sitting too long in the reorder queue. * This should only ever happen if frames are not delivered * without the sender otherwise notifying us (e.g. with a * BAR to move the window). Typically this happens because * of vendor bugs that cause the sequence number to jump. * When this happens we get a gap in the reorder queue that * leaves frame sitting on the queue until they get pushed * out due to window moves. When the vendor does not send * BAR this move only happens due to explicit packet sends * * NB: we only track the time of the oldest frame in the * reorder q; this means that if we flush we might push * frames that still "new"; if this happens then subsequent * frames will result in BA window moves which cost something * but is still better than a big throughput dip. */ clock_t ticks; ticks = ddi_get_lbolt(); if (rap->rxa_qframes != 0) { /* honor batimeout? */ if (ticks - rap->rxa_age > drv_usectohz(500*1000)) { /* * Too long since we received the first * frame; flush the reorder buffer. */ if (rap->rxa_qframes != 0) { ampdu_rx_flush(in, rap); } rap->rxa_start = IEEE80211_SEQ_INC(rxseq); return (PROCESS); } } else { /* * First frame, start aging timer. */ rap->rxa_age = ticks; } #endif /* IEEE80211_AMPDU_AGE */ /* save packet */ if (rap->rxa_m[off] == NULL) { rap->rxa_m[off] = m; rap->rxa_qframes++; rap->rxa_qbytes += MBLKL(m); } else { ieee80211_dbg(IEEE80211_MSG_INPUT | IEEE80211_MSG_HT, "a-mpdu duplicate " "seqno %u tid %u BA win <%u:%u>\n", rxseq, tid, rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd - 1)); freemsg(m); } return (CONSUMED); } if (off < IEEE80211_SEQ_BA_RANGE) { /* * Outside the BA window, but within range; * flush the reorder q and move the window. * Sec 9.10.7.6 b) (D2.04 p.118 line 60) */ ieee80211_dbg(IEEE80211_MSG_HT, "move BA win <%u:%u> (%u frames) rxseq %u tid %u\n", rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd - 1), rap->rxa_qframes, rxseq, tid); /* * The spec says to flush frames up to but not including: * WinStart_B = rxseq - rap->rxa_wnd + 1 * Then insert the frame or notify the caller to process * it immediately. We can safely do this by just starting * over again because we know the frame will now be within * the BA window. */ /* NB: rxa_wnd known to be >0 */ ampdu_rx_flush_upto(in, rap, IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); goto again; } else { /* * Outside the BA window and out of range; toss. * Sec 9.10.7.6 c) (D2.04 p.119 line 16) */ ieee80211_dbg(IEEE80211_MSG_HT, "MSDU" "BA win <%u:%u> (%u frames) rxseq %u tid %u%s\n", rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), rap->rxa_qframes, rxseq, tid, wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); freemsg(m); return (CONSUMED); } #undef CONSUMED #undef PROCESS #undef IEEE80211_FC0_QOSDATA } /* * Process a BAR ctl frame. Dispatch all frames up to * the sequence number of the frame. If this frame is * out of range it's discarded. */ void ieee80211_recv_bar(struct ieee80211_node *in, mblk_t *m0) { struct ieee80211_frame_bar *wh; struct ieee80211_rx_ampdu *rap; ieee80211_seq rxseq; int tid, off; wh = (struct ieee80211_frame_bar *)m0->b_rptr; /* check basic BAR */ tid = MS(LE_16(wh->i_ctl), IEEE80211_BAR_TID); rap = &in->in_rx_ampdu[tid]; if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { /* * No ADDBA request yet, don't touch. */ ieee80211_dbg(IEEE80211_MSG_INPUT | IEEE80211_MSG_HT, "BAR no BA stream, tid %u\n", tid); return; } rxseq = LE_16(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; if (rxseq == rap->rxa_start) return; /* calculate offset in BA window */ off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); if (off < IEEE80211_SEQ_BA_RANGE) { /* * Flush the reorder q up to rxseq and move the window. * Sec 9.10.7.6 a) (D2.04 p.119 line 22) */ ieee80211_dbg(IEEE80211_MSG_HT, "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u\n", rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), rap->rxa_qframes, rxseq, tid); ampdu_rx_flush_upto(in, rap, rxseq); if (off >= rap->rxa_wnd) { /* * BAR specifies a window start to the right of BA * window; we must move it explicitly since * ampdu_rx_flush_upto will not. */ rap->rxa_start = rxseq; } } else { /* * Out of range; toss. * Sec 9.10.7.6 b) (D2.04 p.119 line 41) */ ieee80211_dbg(IEEE80211_MSG_HT, "BAR " "BA win <%u:%u> (%u frames) rxseq %u tid %u%s\n", rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), rap->rxa_qframes, rxseq, tid, wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); } } /* * Setup HT-specific state in a node. Called only * when HT use is negotiated so we don't do extra * work for temporary and/or legacy sta's. */ void ieee80211_ht_node_init(struct ieee80211_node *in, const uint8_t *htcap) { struct ieee80211_tx_ampdu *tap; int ac; if (in->in_flags & IEEE80211_NODE_HT) { /* * Clean AMPDU state on re-associate. This handles the case * where a station leaves w/o notifying us and then returns * before node is reaped for inactivity. */ ieee80211_ht_node_cleanup(in); } ieee80211_parse_htcap(in, htcap); for (ac = 0; ac < WME_NUM_AC; ac++) { tap = &in->in_tx_ampdu[ac]; tap->txa_ac = (uint8_t)ac; /* NB: further initialization deferred */ } in->in_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; } /* * Cleanup HT-specific state in a node. Called only * when HT use has been marked. */ void ieee80211_ht_node_cleanup(struct ieee80211_node *in) { struct ieee80211com *ic = in->in_ic; int i; ASSERT(in->in_flags & IEEE80211_NODE_HT); /* optimize this */ for (i = 0; i < WME_NUM_AC; i++) { struct ieee80211_tx_ampdu *tap = &in->in_tx_ampdu[i]; if (tap->txa_flags & IEEE80211_AGGR_SETUP) { /* * Stop BA stream if setup so driver has a chance * to reclaim any resources it might have allocated. */ ic->ic_addba_stop(in, &in->in_tx_ampdu[i]); /* IEEE80211_TAPQ_DESTROY(tap); */ /* NB: clearing NAK means we may re-send ADDBA */ tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); } } for (i = 0; i < WME_NUM_TID; i++) ampdu_rx_stop(&in->in_rx_ampdu[i]); in->in_htcap = 0; in->in_flags &= ~(IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT | IEEE80211_NODE_AMPDU); } static struct ieee80211_channel * findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) { return ieee80211_find_channel(ic, c->ich_freq, (c->ich_flags &~ IEEE80211_CHAN_HT) | htflags); } /* * Adjust a channel to be HT/non-HT according to the vap's configuration. */ struct ieee80211_channel * ieee80211_ht_adjust_channel(struct ieee80211com *ic, struct ieee80211_channel *chan, int flags) { struct ieee80211_channel *c; if (flags & IEEE80211_FEXT_HT) { /* promote to HT if possible */ if (flags & IEEE80211_FEXT_USEHT40) { if (!IEEE80211_IS_CHAN_HT40(chan)) { /* NB: arbitrarily pick ht40+ over ht40- */ c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); if (c == NULL) c = findhtchan(ic, chan, IEEE80211_CHAN_HT40D); if (c == NULL) c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); if (c != NULL) chan = c; } } else if (!IEEE80211_IS_CHAN_HT20(chan)) { c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); if (c != NULL) chan = c; } } else if (IEEE80211_IS_CHAN_HT(chan)) { /* demote to legacy, HT use is disabled */ c = ieee80211_find_channel(ic, chan->ich_freq, chan->ich_flags &~ IEEE80211_CHAN_HT); if (c != NULL) chan = c; } return (chan); } /* * Setup HT-specific state for a legacy WDS peer. */ void ieee80211_ht_wds_init(struct ieee80211_node *in) { struct ieee80211com *ic = in->in_ic; struct ieee80211_tx_ampdu *tap; int ac; ASSERT(ic->ic_flags_ext & IEEE80211_FEXT_HT); /* check scan cache in case peer has an ap and we have info */ /* * If setup with a legacy channel; locate an HT channel. * Otherwise if the inherited channel (from a companion * AP) is suitable use it so we use the same location * for the extension channel). */ in->in_chan = ieee80211_ht_adjust_channel(ic, in->in_chan, ic->ic_flags_ext); in->in_htcap = 0; if (ic->ic_flags_ext & IEEE80211_FEXT_SHORTGI20) in->in_htcap |= IEEE80211_HTCAP_SHORTGI20; if (IEEE80211_IS_CHAN_HT40(in->in_chan)) { in->in_htcap |= IEEE80211_HTCAP_CHWIDTH40; in->in_chw = 40; if (IEEE80211_IS_CHAN_HT40U(in->in_chan)) in->in_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; else if (IEEE80211_IS_CHAN_HT40D(in->in_chan)) in->in_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; if (ic->ic_flags_ext & IEEE80211_FEXT_SHORTGI40) in->in_htcap |= IEEE80211_HTCAP_SHORTGI40; } else { in->in_chw = 20; in->in_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; } in->in_htctlchan = ieee80211_chan2ieee(ic, in->in_chan); in->in_htopmode = 0; /* need protection state */ in->in_htstbc = 0; /* need info */ for (ac = 0; ac < WME_NUM_AC; ac++) { tap = &in->in_tx_ampdu[ac]; tap->txa_ac = (uint8_t)ac; } /* NB: AMPDU tx/rx governed by IEEE80211_FEXT_AMPDU_{TX,RX} */ in->in_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; } /* * Notify hostap vaps of a change in the HTINFO ie. */ static void htinfo_notify(struct ieee80211com *ic) { if (ic->ic_opmode != IEEE80211_M_HOSTAP) return; ieee80211_dbg(IEEE80211_MSG_ASSOC | IEEE80211_MSG_HT, "HT bss occupancy change: %d sta, %d ht, " "%d ht40%s, HT protmode now 0x%x\n", ic->ic_sta_assoc, ic->ic_ht_sta_assoc, ic->ic_ht40_sta_assoc, (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) ? ", non-HT sta present" : "", ic->ic_curhtprotmode); } /* * Calculate HT protection mode from current * state and handle updates. */ static void htinfo_update(struct ieee80211com *ic) { uint8_t protmode; if (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) { protmode = IEEE80211_HTINFO_OPMODE_PROTOPT | IEEE80211_HTINFO_NONHT_PRESENT; } else if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { protmode = IEEE80211_HTINFO_OPMODE_MIXED | IEEE80211_HTINFO_NONHT_PRESENT; } else if (IEEE80211_IS_CHAN_HT40(ic->ic_curchan) && ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { protmode = IEEE80211_HTINFO_OPMODE_HT20PR; } else { protmode = IEEE80211_HTINFO_OPMODE_PURE; } if (protmode != ic->ic_curhtprotmode) { ic->ic_curhtprotmode = protmode; htinfo_notify(ic); } } /* * Handle an HT station joining a BSS. */ void ieee80211_ht_node_join(struct ieee80211_node *in) { struct ieee80211com *ic = in->in_ic; IEEE80211_LOCK_ASSERT(ic); if (in->in_flags & IEEE80211_NODE_HT) { ic->ic_ht_sta_assoc++; if (in->in_chw == 40) ic->ic_ht40_sta_assoc++; } htinfo_update(ic); } /* * Handle an HT station leaving a BSS. */ void ieee80211_ht_node_leave(struct ieee80211_node *in) { struct ieee80211com *ic = in->in_ic; IEEE80211_LOCK_ASSERT(ic); if (in->in_flags & IEEE80211_NODE_HT) { ic->ic_ht_sta_assoc--; if (in->in_chw == 40) ic->ic_ht40_sta_assoc--; } htinfo_update(ic); } /* * Public version of htinfo_update; used for processing * beacon frames from overlapping bss in hostap_recv_mgmt. */ void ieee80211_htinfo_update(struct ieee80211com *ic, int protmode) { if (protmode != ic->ic_curhtprotmode) { ic->ic_curhtprotmode = (uint8_t)protmode; htinfo_notify(ic); } } /* unalligned little endian access */ #define LE_READ_2(p) \ ((uint16_t) \ ((((const uint8_t *)(p))[0]) | \ (((const uint8_t *)(p))[1] << 8))) /* * Process an 802.11n HT capabilities ie. */ void ieee80211_parse_htcap(struct ieee80211_node *in, const uint8_t *ie) { struct ieee80211com *ic = in->in_ic; if (ie[0] == IEEE80211_ELEMID_VENDOR) { /* * Station used Vendor OUI ie to associate; * mark the node so when we respond we'll use * the Vendor OUI's and not the standard ie's. */ in->in_flags |= IEEE80211_NODE_HTCOMPAT; ie += 4; } else in->in_flags &= ~IEEE80211_NODE_HTCOMPAT; in->in_htcap = *(uint16_t *)(ie + offsetof(struct ieee80211_ie_htcap, hc_cap)); in->in_htparam = ie[offsetof(struct ieee80211_ie_htcap, hc_param)]; /* needed or will ieee80211_parse_htinfo always be called? */ in->in_chw = (in->in_htcap & IEEE80211_HTCAP_CHWIDTH40) && (ic->ic_flags_ext & IEEE80211_FEXT_USEHT40) ? 40 : 20; } /* * Process an 802.11n HT info ie and update the node state. * Note that we handle use this information to identify the * correct channel (HT20, HT40+, HT40-, legacy). The caller * is responsible for insuring any required channel change is * done (e.g. in sta mode when parsing the contents of a * beacon frame). */ void ieee80211_parse_htinfo(struct ieee80211_node *in, const uint8_t *ie) { struct ieee80211com *ic = in->in_ic; const struct ieee80211_ie_htinfo *htinfo; struct ieee80211_channel *c; uint16_t w; int htflags, chanflags; if (ie[0] == IEEE80211_ELEMID_VENDOR) ie += 4; htinfo = (const struct ieee80211_ie_htinfo *)ie; in->in_htctlchan = htinfo->hi_ctrlchannel; in->in_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); w = *(uint16_t *)(&htinfo->hi_byte2); in->in_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); w = *(uint16_t *)(&htinfo->hi_byte45); in->in_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); /* * Handle 11n channel switch. Use the received HT ie's to * identify the right channel to use. If we cannot locate it * in the channel table then fallback to legacy operation. */ htflags = (ic->ic_flags_ext & IEEE80211_FEXT_HT) ? IEEE80211_CHAN_HT20 : 0; /* NB: honor operating mode constraint */ if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && (ic->ic_flags_ext & IEEE80211_FEXT_USEHT40)) { if (in->in_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) htflags = IEEE80211_CHAN_HT40U; else if (in->in_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) htflags = IEEE80211_CHAN_HT40D; } chanflags = (in->in_chan->ich_flags &~ IEEE80211_CHAN_HT) | htflags; if (chanflags != in->in_chan->ich_flags) { c = ieee80211_find_channel(ic, in->in_chan->ich_freq, chanflags); if (c == NULL && htflags != IEEE80211_CHAN_HT20) { /* * No HT40 channel entry in our table; fall back * to HT20 operation. This should not happen. */ c = findhtchan(ic, in->in_chan, IEEE80211_CHAN_HT20); ieee80211_dbg(IEEE80211_MSG_ASSOC | IEEE80211_MSG_HT, "no HT40 channel (freq %u), falling back to HT20\n", in->in_chan->ich_freq); /* stat */ } if (c != NULL && c != in->in_chan) { ieee80211_dbg(IEEE80211_MSG_ASSOC | IEEE80211_MSG_HT, "switch station to HT%d channel %u/0x%x\n", IEEE80211_IS_CHAN_HT40(c) ? 40 : 20, c->ich_freq, c->ich_flags); in->in_chan = c; } /* NB: caller responsible for forcing any channel change */ } /* update node's tx channel width */ in->in_chw = IEEE80211_IS_CHAN_HT40(in->in_chan)? 40 : 20; } /* * Install received HT rate set by parsing the HT cap ie. */ int ieee80211_setup_htrates(struct ieee80211_node *in, const uint8_t *ie, int flags) { const struct ieee80211_ie_htcap *htcap; struct ieee80211_htrateset *rs; int i; rs = &in->in_htrates; (void) memset(rs, 0, sizeof (*rs)); if (ie != NULL) { if (ie[0] == IEEE80211_ELEMID_VENDOR) ie += 4; htcap = (const struct ieee80211_ie_htcap *) ie; for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { if (ieee80211_isclr(htcap->hc_mcsset, i)) continue; if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { ieee80211_dbg( IEEE80211_MSG_XRATE | IEEE80211_MSG_HT, "WARNING, HT rate set too large; only " "using %u rates\n", IEEE80211_HTRATE_MAXSIZE); break; } rs->rs_rates[rs->rs_nrates++] = (uint8_t)i; } } return (ieee80211_fix_rate(in, (struct ieee80211_rateset *)rs, flags)); } /* * Mark rates in a node's HT rate set as basic according * to the information in the supplied HT info ie. */ void ieee80211_setup_basic_htrates(struct ieee80211_node *in, const uint8_t *ie) { const struct ieee80211_ie_htinfo *htinfo; struct ieee80211_htrateset *rs; int i, j; if (ie[0] == IEEE80211_ELEMID_VENDOR) ie += 4; htinfo = (const struct ieee80211_ie_htinfo *) ie; rs = &in->in_htrates; if (rs->rs_nrates == 0) { ieee80211_dbg(IEEE80211_MSG_XRATE | IEEE80211_MSG_HT, "WARNING, empty HT rate set\n"); return; } for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { if (ieee80211_isclr(htinfo->hi_basicmcsset, i)) continue; for (j = 0; j < rs->rs_nrates; j++) if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) rs->rs_rates[j] |= IEEE80211_RATE_BASIC; } } static void addba_timeout(void *arg) { struct ieee80211_tx_ampdu *tap = arg; tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; tap->txa_attempts++; } static void addba_start_timeout(struct ieee80211_tx_ampdu *tap) { tap->txa_timer = timeout(addba_timeout, (void *)tap, drv_usectohz(IEEE80211_AGGR_TIMEOUT * 1000)); tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; tap->txa_lastrequest = ddi_get_lbolt(); } static void addba_stop_timeout(struct ieee80211_tx_ampdu *tap) { if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { if (tap->txa_timer != NULL) { (void) untimeout(tap->txa_timer); tap->txa_timer = NULL; } tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; } } /* * Default method for requesting A-MPDU tx aggregation. * We setup the specified state block and start a timer * to wait for an ADDBA response frame. */ /* ARGSUSED */ static int ieee80211_addba_request(struct ieee80211_node *in, struct ieee80211_tx_ampdu *tap, int dialogtoken, int baparamset, int batimeout) { int bufsiz; tap->txa_token = (uint8_t)dialogtoken; tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; tap->txa_start = tap->txa_seqstart = 0; bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); tap->txa_wnd = (bufsiz == 0) ? IEEE80211_AGGR_BAWMAX : min((uint16_t)bufsiz, IEEE80211_AGGR_BAWMAX); addba_start_timeout(tap); return (1); } /* * Default method for processing an A-MPDU tx aggregation * response. We shutdown any pending timer and update the * state block according to the reply. */ /* ARGSUSED */ static int ieee80211_addba_response(struct ieee80211_node *in, struct ieee80211_tx_ampdu *tap, int status, int baparamset, int batimeout) { int bufsiz; addba_stop_timeout(tap); if (status == IEEE80211_STATUS_SUCCESS) { bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); /* override our request? */ tap->txa_wnd = (bufsiz == 0) ? IEEE80211_AGGR_BAWMAX : min((uint16_t)bufsiz, IEEE80211_AGGR_BAWMAX); tap->txa_flags |= IEEE80211_AGGR_RUNNING; } else { /* mark tid so we don't try again */ tap->txa_flags |= IEEE80211_AGGR_NAK; } return (1); } /* * Default method for stopping A-MPDU tx aggregation. * Any timer is cleared and we drain any pending frames. */ /* ARGSUSED */ static void ieee80211_addba_stop(struct ieee80211_node *in, struct ieee80211_tx_ampdu *tap) { addba_stop_timeout(tap); if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { /* clear aggregation queue */ tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; } tap->txa_attempts = 0; } /* * Process a received action frame using the default aggregation * policy. We intercept ADDBA-related frames and use them to * update our aggregation state. All other frames are passed up * for processing by ieee80211_recv_action. */ static void ieee80211_aggr_recv_action(struct ieee80211_node *in, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211com *ic = in->in_ic; const struct ieee80211_action *ia; struct ieee80211_rx_ampdu *rap; struct ieee80211_tx_ampdu *tap; uint8_t dialogtoken; uint16_t baparamset, batimeout, baseqctl, code; uint16_t args[4]; int tid, ac, bufsiz; ia = (const struct ieee80211_action *) frm; switch (ia->ia_category) { case IEEE80211_ACTION_CAT_BA: switch (ia->ia_action) { case IEEE80211_ACTION_BA_ADDBA_REQUEST: dialogtoken = frm[2]; baparamset = *(uint16_t *)(frm+3); batimeout = *(uint16_t *)(frm+5); baseqctl = *(uint16_t *)(frm+7); tid = MS(baparamset, IEEE80211_BAPS_TID); bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "recv ADDBA request: dialogtoken %u " "baparamset 0x%x (tid %d bufsiz %d) batimeout %d " "baseqctl %d:%d\n", dialogtoken, baparamset, tid, bufsiz, batimeout, MS(baseqctl, IEEE80211_BASEQ_START), MS(baseqctl, IEEE80211_BASEQ_FRAG)); rap = &in->in_rx_ampdu[tid]; /* Send ADDBA response */ args[0] = dialogtoken; /* * NB: We ack only if the sta associated with HT and * the ap is configured to do AMPDU rx (the latter * violates the 11n spec and is mostly for testing). */ if ((in->in_flags & IEEE80211_NODE_AMPDU_RX) && (ic->ic_flags_ext & IEEE80211_FEXT_AMPDU_RX)) { ampdu_rx_start(rap, bufsiz, MS(baseqctl, IEEE80211_BASEQ_START)); args[1] = IEEE80211_STATUS_SUCCESS; } else { ieee80211_dbg( IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "reject ADDBA request: %s\n", in->in_flags & IEEE80211_NODE_AMPDU_RX ? "administratively disabled" : "not negotiated for station"); args[1] = IEEE80211_STATUS_UNSPECIFIED; } /* honor rap flags? */ args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE | SM(tid, IEEE80211_BAPS_TID) | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ); args[3] = 0; ic->ic_send_action(in, IEEE80211_ACTION_CAT_BA, IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); return; case IEEE80211_ACTION_BA_ADDBA_RESPONSE: dialogtoken = frm[2]; code = *(uint16_t *)(frm+3); baparamset = *(uint16_t *)(frm+5); tid = MS(baparamset, IEEE80211_BAPS_TID); bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); batimeout = *(uint16_t *)(frm+7); ac = TID_TO_WME_AC(tid); tap = &in->in_tx_ampdu[ac]; if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { ieee80211_err("ADDBA response" "no pending ADDBA, tid %d dialogtoken %u " "code %d\n", tid, dialogtoken, code); return; } if (dialogtoken != tap->txa_token) { ieee80211_err("ADDBA response" "dialogtoken mismatch: waiting for %d, " "received %d, tid %d code %d\n", tap->txa_token, dialogtoken, tid, code); return; } ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "recv ADDBA response: dialogtoken %u code %d " "baparamset 0x%x (tid %d bufsiz %d) batimeout %d\n", dialogtoken, code, baparamset, tid, bufsiz, batimeout); ic->ic_addba_response(in, tap, code, baparamset, batimeout); return; case IEEE80211_ACTION_BA_DELBA: baparamset = *(uint16_t *)(frm+2); code = *(uint16_t *)(frm+4); tid = MS(baparamset, IEEE80211_DELBAPS_TID); ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "recv DELBA: baparamset 0x%x (tid %d initiator %d) " "code %d\n", baparamset, tid, MS(baparamset, IEEE80211_DELBAPS_INIT), code); if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { ac = TID_TO_WME_AC(tid); tap = &in->in_tx_ampdu[ac]; ic->ic_addba_stop(in, tap); } else { rap = &in->in_rx_ampdu[tid]; ampdu_rx_stop(rap); } return; } break; } ieee80211_recv_action(in, frm, efrm); } /* * Process a received 802.11n action frame. * Aggregation-related frames are assumed to be handled * already; we handle any other frames we can, otherwise * complain about being unsupported (with debugging). */ /* ARGSUSED */ void ieee80211_recv_action(struct ieee80211_node *in, const uint8_t *frm, const uint8_t *efrm) { const struct ieee80211_action *ia; int chw; ia = (const struct ieee80211_action *) frm; switch (ia->ia_category) { case IEEE80211_ACTION_CAT_BA: ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "BA action %d not implemented\n", ia->ia_action); break; case IEEE80211_ACTION_CAT_HT: switch (ia->ia_action) { case IEEE80211_ACTION_HT_TXCHWIDTH: chw = frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040 ? 40 : 20; if (chw != in->in_chw) { in->in_chw = (uint8_t)chw; in->in_flags |= IEEE80211_NODE_CHWUPDATE; } ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "HT txchwidth, width %d (%s)\n", chw, in->in_flags & IEEE80211_NODE_CHWUPDATE ? "new" : "no change"); break; case IEEE80211_ACTION_HT_MIMOPWRSAVE: ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "HT MIMO PS\n"); break; default: ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "HT action %d not implemented\n", ia->ia_action); break; } break; default: ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "category %d not implemented\n", ia->ia_category); break; } } /* * Transmit processing. */ /* * Request A-MPDU tx aggregation. Setup local state and * issue an ADDBA request. BA use will only happen after * the other end replies with ADDBA response. */ int ieee80211_ampdu_request(struct ieee80211_node *in, struct ieee80211_tx_ampdu *tap) { struct ieee80211com *ic = in->in_ic; uint16_t args[4]; int tid, dialogtoken; static int tokens = 0; /* tokens */ clock_t ticks; ticks = ddi_get_lbolt(); if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { /* do deferred setup of state */ tap->txa_flags |= IEEE80211_AGGR_SETUP; } if (tap->txa_attempts >= IEEE80211_AGGR_MAXTRIES && (ticks - tap->txa_lastrequest) < IEEE80211_AGGR_MINRETRY) { /* * Don't retry too often; IEEE80211_AGGR_MINRETRY * defines the minimum interval we'll retry after * IEEE80211_AGGR_MAXTRIES failed attempts to * negotiate use. */ return (0); } /* hack for not doing proper locking */ tap->txa_flags &= ~IEEE80211_AGGR_NAK; dialogtoken = (tokens+1) % 63; /* algorithm */ tid = WME_AC_TO_TID(tap->txa_ac); args[0] = (uint16_t)dialogtoken; args[1] = IEEE80211_BAPS_POLICY_IMMEDIATE | SM(tid, IEEE80211_BAPS_TID) | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ); args[2] = 0; /* batimeout */ args[3] = SM(0, IEEE80211_BASEQ_START) | SM(0, IEEE80211_BASEQ_FRAG); /* NB: do first so there's no race against reply */ if (!ic->ic_addba_request(in, tap, dialogtoken, args[1], args[2])) { /* unable to setup state, don't make request */ ieee80211_dbg(IEEE80211_MSG_HT, "could not setup BA stream for AC %d\n", tap->txa_ac); /* defer next try so we don't slam the driver with requests */ tap->txa_attempts = IEEE80211_AGGR_MAXTRIES; tap->txa_lastrequest = ticks; return (0); } tokens = dialogtoken; /* allocate token */ return (ic->ic_send_action(in, IEEE80211_ACTION_CAT_BA, IEEE80211_ACTION_BA_ADDBA_REQUEST, args)); } /* * Terminate an AMPDU tx stream. State is reclaimed * and the peer notified with a DelBA Action frame. */ void ieee80211_ampdu_stop(struct ieee80211_node *in, struct ieee80211_tx_ampdu *tap) { struct ieee80211com *ic = in->in_ic; uint16_t args[4]; if (IEEE80211_AMPDU_RUNNING(tap)) { ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "stop BA stream for AC %d\n", tap->txa_ac); ic->ic_addba_stop(in, tap); args[0] = WME_AC_TO_TID(tap->txa_ac); args[1] = IEEE80211_DELBAPS_INIT; args[2] = 1; /* reason code */ (void) ieee80211_send_action(in, IEEE80211_ACTION_CAT_BA, IEEE80211_ACTION_BA_DELBA, args); } else { ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "BA stream for AC %d not running\n", tap->txa_ac); } } /* * Transmit a BAR frame to the specified node. The * BAR contents are drawn from the supplied aggregation * state associated with the node. */ int ieee80211_send_bar(struct ieee80211_node *in, const struct ieee80211_tx_ampdu *tap) { #define ADDSHORT(frm, v) do { \ _NOTE(CONSTCOND) \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ _NOTE(CONSTCOND) \ } while (0) struct ieee80211com *ic = in->in_ic; struct ieee80211_frame_min *wh; mblk_t *m; uint8_t *frm; uint16_t barctl, barseqctl; int tid; m = ieee80211_getmgtframe(&frm, sizeof (struct ieee80211_ba_request)); if (m == NULL) return (ENOMEM); wh = (struct ieee80211_frame_min *)m->b_rptr; wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; wh->i_fc[1] = 0; IEEE80211_ADDR_COPY(wh->i_addr1, in->in_macaddr); IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_macaddr); tid = WME_AC_TO_TID(tap->txa_ac); barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? IEEE80211_BAPS_POLICY_IMMEDIATE : IEEE80211_BAPS_POLICY_DELAYED) | SM(tid, IEEE80211_BAPS_TID) | SM(tap->txa_wnd, IEEE80211_BAPS_BUFSIZ); barseqctl = SM(tap->txa_start, IEEE80211_BASEQ_START) | SM(0, IEEE80211_BASEQ_FRAG); ADDSHORT(frm, barctl); ADDSHORT(frm, barseqctl); m->b_wptr = frm; ieee80211_dbg(IEEE80211_MSG_DEBUG, "send bar frame (tid %u start %u) on channel %u\n", tid, tap->txa_start, ieee80211_chan2ieee(ic, ic->ic_curchan)); (void) (*ic->ic_xmit)(ic, m, IEEE80211_FC0_TYPE_CTL); /* MGT? */ return (0); #undef ADDSHORT } /* * Send an action management frame. The arguments are stuff * into a frame without inspection; the caller is assumed to * prepare them carefully (e.g. based on the aggregation state). */ int ieee80211_send_action(struct ieee80211_node *in, int category, int action, uint16_t args[4]) { #define ADDSHORT(frm, v) do { \ _NOTE(CONSTCOND) \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ _NOTE(CONSTCOND) \ } while (0) struct ieee80211com *ic = in->in_ic; mblk_t *m; uint8_t *frm; uint16_t baparamset; int ret; ASSERT(in != NULL); m = ieee80211_getmgtframe(&frm, sizeof (uint16_t) /* action+category */ /* may action payload */ + sizeof (struct ieee80211_action_ba_addbaresponse)); if (m == NULL) return (ENOMEM); *frm++ = (uint8_t)category; *frm++ = (uint8_t)action; switch (category) { case IEEE80211_ACTION_CAT_BA: switch (action) { case IEEE80211_ACTION_BA_ADDBA_REQUEST: ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "send ADDBA request: dialogtoken %d " "baparamset 0x%x (tid %d) " "batimeout 0x%x baseqctl 0x%x\n", args[0], args[1], MS(args[1], IEEE80211_BAPS_TID), args[2], args[3]); *frm++ = args[0]; /* dialog token */ ADDSHORT(frm, args[1]); /* baparamset */ ADDSHORT(frm, args[2]); /* batimeout */ ADDSHORT(frm, args[3]); /* baseqctl */ break; case IEEE80211_ACTION_BA_ADDBA_RESPONSE: ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "send ADDBA response: dialogtoken %d status %d " "baparamset 0x%x (tid %d) batimeout %d\n", args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID), args[3]); *frm++ = args[0]; /* dialog token */ ADDSHORT(frm, args[1]); /* statuscode */ ADDSHORT(frm, args[2]); /* baparamset */ ADDSHORT(frm, args[3]); /* batimeout */ break; case IEEE80211_ACTION_BA_DELBA: baparamset = SM(args[0], IEEE80211_DELBAPS_TID) | SM(args[1], IEEE80211_DELBAPS_INIT); ADDSHORT(frm, baparamset); ADDSHORT(frm, args[2]); /* reason code */ ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "send DELBA action: tid %d, initiator %d " "reason %d\n", args[0], args[1], args[2]); break; default: goto badaction; } break; case IEEE80211_ACTION_CAT_HT: switch (action) { case IEEE80211_ACTION_HT_TXCHWIDTH: ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "send HT txchwidth: width %d\n", IEEE80211_IS_CHAN_HT40(ic->ic_curchan) ? 40 : 20); *frm++ = IEEE80211_IS_CHAN_HT40(ic->ic_curchan) ? IEEE80211_A_HT_TXCHWIDTH_2040 : IEEE80211_A_HT_TXCHWIDTH_20; break; default: goto badaction; } break; default: badaction: ieee80211_dbg(IEEE80211_MSG_ACTION | IEEE80211_MSG_HT, "unsupported category %d action %d\n", category, action); return (EINVAL); /* NOTREACHED */ } m->b_wptr = frm; ret = ieee80211_mgmt_output(ic, in, m, IEEE80211_FC0_SUBTYPE_ACTION, 0); return (ret); #undef ADDSHORT } /* * Construct the MCS bit mask for inclusion * in an HT information element. */ static void ieee80211_set_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) { int i; for (i = 0; i < rs->rs_nrates; i++) { int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; if (r < IEEE80211_HTRATE_MAXSIZE) { /* NB: this assumes a particular implementation */ ieee80211_setbit(frm, r); } } } /* * Add body of an HTCAP information element. */ static uint8_t * ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *in) { #define ADDSHORT(frm, v) do { \ _NOTE(CONSTCOND) \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ _NOTE(CONSTCOND) \ } while (0) struct ieee80211com *ic = in->in_ic; uint16_t caps; int rxmax, density; /* HT capabilities */ caps = ic->ic_htcaps & 0xffff; /* * Note channel width depends on whether we are operating as * a sta or not. When operating as a sta we are generating * a request based on our desired configuration. Otherwise * we are operational and the channel attributes identify * how we've been setup (which might be different if a fixed * channel is specified). */ if (ic->ic_opmode == IEEE80211_M_STA) { /* override 20/40 use based on config */ if (ic->ic_flags_ext & IEEE80211_FEXT_USEHT40) caps |= IEEE80211_HTCAP_CHWIDTH40; else caps &= ~IEEE80211_HTCAP_CHWIDTH40; /* use advertised setting (locally constraint) */ rxmax = MS(in->in_htparam, IEEE80211_HTCAP_MAXRXAMPDU); density = MS(in->in_htparam, IEEE80211_HTCAP_MPDUDENSITY); } else { /* override 20/40 use based on current channel */ if (IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) caps |= IEEE80211_HTCAP_CHWIDTH40; else caps &= ~IEEE80211_HTCAP_CHWIDTH40; rxmax = ic->ic_ampdu_rxmax; density = ic->ic_ampdu_density; } /* adjust short GI based on channel and config */ if ((ic->ic_flags_ext & IEEE80211_FEXT_SHORTGI20) == 0) caps &= ~IEEE80211_HTCAP_SHORTGI20; if ((ic->ic_flags_ext & IEEE80211_FEXT_SHORTGI40) == 0 || (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) caps &= ~IEEE80211_HTCAP_SHORTGI40; ADDSHORT(frm, caps); /* HT parameters */ *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) | SM(density, IEEE80211_HTCAP_MPDUDENSITY); frm++; /* pre-zero remainder of ie */ (void) memset(frm, 0, sizeof (struct ieee80211_ie_htcap) - offsetof(struct ieee80211_ie_htcap, hc_mcsset)); /* supported MCS set */ /* * it would better to get the rate set from in_htrates * so we can restrict it but for sta mode in_htrates isn't * setup when we're called to form an AssocReq frame so for * now we're restricted to the default HT rate set. */ ieee80211_set_htrates(frm, &ieee80211_rateset_11n); frm += sizeof (struct ieee80211_ie_htcap) - offsetof(struct ieee80211_ie_htcap, hc_mcsset); return (frm); #undef ADDSHORT } /* * Add 802.11n HT capabilities information element */ uint8_t * ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *in) { frm[0] = IEEE80211_ELEMID_HTCAP; frm[1] = sizeof (struct ieee80211_ie_htcap) - 2; return (ieee80211_add_htcap_body(frm + 2, in)); } /* * Add Broadcom OUI wrapped standard HTCAP ie; this is * used for compatibility w/ pre-draft implementations. */ uint8_t * ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *in) { frm[0] = IEEE80211_ELEMID_VENDOR; frm[1] = 4 + sizeof (struct ieee80211_ie_htcap) - 2; frm[2] = (BCM_OUI >> 0) & 0xff; frm[3] = (BCM_OUI >> 8) & 0xff; frm[4] = (BCM_OUI >> 16) & 0xff; frm[5] = BCM_OUI_HTCAP; return (ieee80211_add_htcap_body(frm + 6, in)); } /* * Construct the MCS bit mask of basic rates * for inclusion in an HT information element. */ static void ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) { int i; for (i = 0; i < rs->rs_nrates; i++) { int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && r < IEEE80211_HTRATE_MAXSIZE) { /* NB: this assumes a particular implementation */ ieee80211_setbit(frm, r); } } } /* * Update the HTINFO ie for a beacon frame. */ void ieee80211_ht_update_beacon(struct ieee80211com *ic, struct ieee80211_beacon_offsets *bo) { #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) struct ieee80211_ie_htinfo *ht = (struct ieee80211_ie_htinfo *)bo->bo_htinfo; /* only update on channel change */ ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, ic->ic_curchan); ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; if (IEEE80211_IS_CHAN_HT40U(ic->ic_curchan)) ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; else if (IEEE80211_IS_CHAN_HT40D(ic->ic_curchan)) ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; else /* LINTED */ ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; if (IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; /* protection mode */ ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; /* propagate to vendor ie's */ #undef PROTMODE } /* * Add body of an HTINFO information element. * * NB: We don't use struct ieee80211_ie_htinfo because we can * be called to fillin both a standard ie and a compat ie that * has a vendor OUI at the front. */ static uint8_t * ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *in) { struct ieee80211com *ic = in->in_ic; /* pre-zero remainder of ie */ (void) memset(frm, 0, sizeof (struct ieee80211_ie_htinfo) - 2); /* primary/control channel center */ *frm++ = ieee80211_chan2ieee(ic, ic->ic_curchan); frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; if (IEEE80211_IS_CHAN_HT40U(ic->ic_curchan)) frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; else if (IEEE80211_IS_CHAN_HT40D(ic->ic_curchan)) frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; else /* LINTED */ frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; if (IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; frm[1] = ic->ic_curhtprotmode; frm += 5; /* basic MCS set */ ieee80211_set_basic_htrates(frm, &in->in_htrates); frm += sizeof (struct ieee80211_ie_htinfo) - offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); return (frm); } /* * Add 802.11n HT information information element. */ uint8_t * ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *in) { frm[0] = IEEE80211_ELEMID_HTINFO; frm[1] = sizeof (struct ieee80211_ie_htinfo) - 2; return (ieee80211_add_htinfo_body(frm + 2, in)); } /* * Add Broadcom OUI wrapped standard HTINFO ie; this is * used for compatibility w/ pre-draft implementations. */ uint8_t * ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *in) { frm[0] = IEEE80211_ELEMID_VENDOR; frm[1] = 4 + sizeof (struct ieee80211_ie_htinfo) - 2; frm[2] = (BCM_OUI >> 0) & 0xff; frm[3] = (BCM_OUI >> 8) & 0xff; frm[4] = (BCM_OUI >> 16) & 0xff; frm[5] = BCM_OUI_HTINFO; return (ieee80211_add_htinfo_body(frm + 6, in)); } void ieee80211_ht_attach(struct ieee80211com *ic) { /* setup default aggregation policy */ ic->ic_recv_action = ieee80211_aggr_recv_action; ic->ic_send_action = ieee80211_send_action; ic->ic_addba_request = ieee80211_addba_request; ic->ic_addba_response = ieee80211_addba_response; ic->ic_addba_stop = ieee80211_addba_stop; ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; /* get from driver */ ic->ic_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; ic->ic_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; ic->ic_ampdu_limit = ic->ic_ampdu_rxmax; ic->ic_amsdu_limit = IEEE80211_HTCAP_MAXAMSDU_3839; if (ic->ic_htcaps & IEEE80211_HTC_HT) { /* * Device is HT capable; enable all HT-related * facilities by default. * these choices may be too aggressive. */ ic->ic_flags_ext |= IEEE80211_FEXT_HT | IEEE80211_FEXT_HTCOMPAT; if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) ic->ic_flags_ext |= IEEE80211_FEXT_SHORTGI20; /* infer from channel list? */ if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) { ic->ic_flags_ext |= IEEE80211_FEXT_USEHT40; if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40) ic->ic_flags_ext |= IEEE80211_FEXT_SHORTGI40; } /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ ic->ic_flags_ext |= IEEE80211_FEXT_AMPDU_RX; if (ic->ic_htcaps & IEEE80211_HTC_AMPDU) ic->ic_flags_ext |= IEEE80211_FEXT_AMPDU_TX; ic->ic_flags_ext |= IEEE80211_FEXT_AMSDU_RX; if (ic->ic_htcaps & IEEE80211_HTC_AMSDU) ic->ic_flags_ext |= IEEE80211_FEXT_AMSDU_TX; } #define ieee80211_isset16(a, i) ((a) & (1 << (i))) /* fill default rate sets for 11NA/11NG if driver has no specified */ if (ieee80211_isset16(ic->ic_modecaps, IEEE80211_MODE_11NA) && ic->ic_sup_rates[IEEE80211_MODE_11NA].ir_nrates == 0) { ic->ic_sup_rates[IEEE80211_MODE_11NA] = ic->ic_sup_rates[IEEE80211_MODE_11A]; } if (ieee80211_isset16(ic->ic_modecaps, IEEE80211_MODE_11NG) && ic->ic_sup_rates[IEEE80211_MODE_11NG].ir_nrates == 0) { ic->ic_sup_rates[IEEE80211_MODE_11NG] = ic->ic_sup_rates[IEEE80211_MODE_11G]; } #undef ieee80211_isset16 } /* ARGSUSED */ void ieee80211_ht_detach(struct ieee80211com *ic) { } /* ARGSUSED */ static void ht_announce(struct ieee80211com *ic, int mode, const struct ieee80211_htrateset *rs) { int i, rate; ieee80211_dbg(IEEE80211_MSG_HT, "%s MCS: \n", ieee80211_phymode_name[mode]); for (i = 0; i < rs->rs_nrates; i++) { rate = ieee80211_htrates[rs->rs_rates[i]]; ieee80211_dbg(IEEE80211_MSG_HT, "%s%d%sMbps\n", (i != 0 ? " " : ""), rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); } } void ieee80211_ht_announce(struct ieee80211com *ic) { if (ic->ic_modecaps & (1 << IEEE80211_MODE_11NA)) ht_announce(ic, IEEE80211_MODE_11NA, &ieee80211_rateset_11n); if (ic->ic_modecaps & (1 << IEEE80211_MODE_11NG)) ht_announce(ic, IEEE80211_MODE_11NG, &ieee80211_rateset_11n); } /* ARGSUSED */ const struct ieee80211_htrateset * ieee80211_get_suphtrates(struct ieee80211com *ic, const struct ieee80211_channel *c) { return (&ieee80211_rateset_11n); }