4207227c6a
o include ath ie in beacon frames o fix probe response check for including ath ie o add ieee80211_add_athcap shorthand for ap-side ie additions
526 lines
15 KiB
C
526 lines
15 KiB
C
/*-
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* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/endian.h>
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#include <sys/socket.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_llc.h>
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#include <net/if_media.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_input.h>
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#include <net80211/ieee80211_phy.h>
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#include <net80211/ieee80211_superg.h>
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#define ETHER_HEADER_COPY(dst, src) \
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memcpy(dst, src, sizeof(struct ether_header))
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void
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ieee80211_superg_attach(struct ieee80211com *ic)
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{
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}
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void
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ieee80211_superg_detach(struct ieee80211com *ic)
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{
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}
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void
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ieee80211_superg_vattach(struct ieee80211vap *vap)
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{
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if (vap->iv_caps & IEEE80211_C_FF)
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vap->iv_flags |= IEEE80211_F_FF;
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/* NB: we only implement sta mode */
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if (vap->iv_opmode == IEEE80211_M_STA &&
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(vap->iv_caps & IEEE80211_C_TURBOP))
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vap->iv_flags |= IEEE80211_F_TURBOP;
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}
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void
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ieee80211_superg_vdetach(struct ieee80211vap *vap)
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{
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}
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#define ATH_OUI_BYTES 0x00, 0x03, 0x7f
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/*
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* Add a WME information element to a frame.
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*/
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uint8_t *
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ieee80211_add_ath(uint8_t *frm, uint8_t caps, ieee80211_keyix defkeyix)
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{
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static const struct ieee80211_ath_ie info = {
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.ath_id = IEEE80211_ELEMID_VENDOR,
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.ath_len = sizeof(struct ieee80211_ath_ie) - 2,
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.ath_oui = { ATH_OUI_BYTES },
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.ath_oui_type = ATH_OUI_TYPE,
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.ath_oui_subtype= ATH_OUI_SUBTYPE,
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.ath_version = ATH_OUI_VERSION,
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};
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struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm;
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memcpy(frm, &info, sizeof(info));
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ath->ath_capability = caps;
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if (defkeyix != IEEE80211_KEYIX_NONE) {
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ath->ath_defkeyix[0] = (defkeyix & 0xff);
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ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff);
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} else {
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ath->ath_defkeyix[0] = 0xff;
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ath->ath_defkeyix[1] = 0x7f;
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}
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return frm + sizeof(info);
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}
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#undef ATH_OUI_BYTES
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uint8_t *
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ieee80211_add_athcaps(uint8_t *frm, const struct ieee80211_node *bss)
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{
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const struct ieee80211vap *vap = bss->ni_vap;
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return ieee80211_add_ath(frm,
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vap->iv_flags & IEEE80211_F_ATHEROS,
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((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
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bss->ni_authmode != IEEE80211_AUTH_8021X) ?
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vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
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}
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void
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ieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie)
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{
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const struct ieee80211_ath_ie *ath =
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(const struct ieee80211_ath_ie *) ie;
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ni->ni_ath_flags = ath->ath_capability;
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ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix);
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}
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int
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ieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm,
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const struct ieee80211_frame *wh)
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{
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struct ieee80211vap *vap = ni->ni_vap;
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const struct ieee80211_ath_ie *ath;
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u_int len = frm[1];
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int capschanged;
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uint16_t defkeyix;
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if (len < sizeof(struct ieee80211_ath_ie)-2) {
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IEEE80211_DISCARD_IE(vap,
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IEEE80211_MSG_ELEMID | IEEE80211_MSG_SUPERG,
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wh, "Atheros", "too short, len %u", len);
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return -1;
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}
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ath = (const struct ieee80211_ath_ie *)frm;
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capschanged = (ni->ni_ath_flags != ath->ath_capability);
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defkeyix = LE_READ_2(ath->ath_defkeyix);
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if (capschanged || defkeyix != ni->ni_ath_defkeyix) {
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ni->ni_ath_flags = ath->ath_capability;
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ni->ni_ath_defkeyix = defkeyix;
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IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
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"ath ie change: new caps 0x%x defkeyix 0x%x",
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ni->ni_ath_flags, ni->ni_ath_defkeyix);
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}
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if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) {
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uint16_t curflags, newflags;
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/*
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* Check for turbo mode switch. Calculate flags
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* for the new mode and effect the switch.
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*/
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newflags = curflags = vap->iv_ic->ic_bsschan->ic_flags;
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/* NB: BOOST is not in ic_flags, so get it from the ie */
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if (ath->ath_capability & ATHEROS_CAP_BOOST)
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newflags |= IEEE80211_CHAN_TURBO;
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else
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newflags &= ~IEEE80211_CHAN_TURBO;
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if (newflags != curflags)
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ieee80211_dturbo_switch(vap, newflags);
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}
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return capschanged;
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}
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/*
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* Decap the encapsulated frame pair and dispatch the first
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* for delivery. The second frame is returned for delivery
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* via the normal path.
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*/
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struct mbuf *
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ieee80211_ff_decap(struct ieee80211_node *ni, struct mbuf *m)
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{
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#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
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#define MS(x,f) (((x) & f) >> f##_S)
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struct ieee80211vap *vap = ni->ni_vap;
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struct llc *llc;
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uint32_t ath;
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struct mbuf *n;
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int framelen;
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/* NB: we assume caller does this check for us */
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KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),
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("ff not negotiated"));
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/*
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* Check for fast-frame tunnel encapsulation.
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*/
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if (m->m_pkthdr.len < 3*FF_LLC_SIZE)
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return m;
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if (m->m_len < FF_LLC_SIZE &&
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(m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
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ni->ni_macaddr, "fast-frame",
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"%s", "m_pullup(llc) failed");
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vap->iv_stats.is_rx_tooshort++;
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return NULL;
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}
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llc = (struct llc *)(mtod(m, uint8_t *) +
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sizeof(struct ether_header));
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if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE))
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return m;
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m_adj(m, FF_LLC_SIZE);
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m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);
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if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
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ni->ni_macaddr, "fast-frame",
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"unsupport tunnel protocol, header 0x%x", ath);
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vap->iv_stats.is_ff_badhdr++;
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m_freem(m);
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return NULL;
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}
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/* NB: skip header and alignment padding */
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m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2);
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vap->iv_stats.is_ff_decap++;
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/*
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* Decap the first frame, bust it apart from the
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* second and deliver; then decap the second frame
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* and return it to the caller for normal delivery.
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*/
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m = ieee80211_decap1(m, &framelen);
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if (m == NULL) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
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ni->ni_macaddr, "fast-frame", "%s", "first decap failed");
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vap->iv_stats.is_ff_tooshort++;
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return NULL;
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}
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n = m_split(m, framelen, M_NOWAIT);
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if (n == NULL) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
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ni->ni_macaddr, "fast-frame",
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"%s", "unable to split encapsulated frames");
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vap->iv_stats.is_ff_split++;
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m_freem(m); /* NB: must reclaim */
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return NULL;
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}
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/* XXX not right for WDS */
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vap->iv_deliver_data(vap, ni, m); /* 1st of pair */
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/*
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* Decap second frame.
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*/
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m_adj(n, roundup2(framelen, 4) - framelen); /* padding */
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n = ieee80211_decap1(n, &framelen);
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if (n == NULL) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
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ni->ni_macaddr, "fast-frame", "%s", "second decap failed");
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vap->iv_stats.is_ff_tooshort++;
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}
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/* XXX verify framelen against mbuf contents */
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return n; /* 2nd delivered by caller */
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#undef MS
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#undef FF_LLC_SIZE
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}
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/*
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* Do Ethernet-LLC encapsulation for each payload in a fast frame
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* tunnel encapsulation. The frame is assumed to have an Ethernet
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* header at the front that must be stripped before prepending the
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* LLC followed by the Ethernet header passed in (with an Ethernet
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* type that specifies the payload size).
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*/
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static struct mbuf *
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ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
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const struct ether_header *eh)
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{
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struct llc *llc;
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uint16_t payload;
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/* XXX optimize by combining m_adj+M_PREPEND */
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m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
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llc = mtod(m, struct llc *);
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llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
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llc->llc_control = LLC_UI;
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llc->llc_snap.org_code[0] = 0;
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llc->llc_snap.org_code[1] = 0;
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llc->llc_snap.org_code[2] = 0;
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llc->llc_snap.ether_type = eh->ether_type;
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payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
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M_PREPEND(m, sizeof(struct ether_header), M_DONTWAIT);
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if (m == NULL) { /* XXX cannot happen */
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
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"%s: no space for ether_header\n", __func__);
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vap->iv_stats.is_tx_nobuf++;
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return NULL;
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}
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ETHER_HEADER_COPY(mtod(m, void *), eh);
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mtod(m, struct ether_header *)->ether_type = htons(payload);
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return m;
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}
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/*
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* Fast frame encapsulation. There must be two packets
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* chained with m_nextpkt. We do header adjustment for
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* each, add the tunnel encapsulation, and then concatenate
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* the mbuf chains to form a single frame for transmission.
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*/
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struct mbuf *
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ieee80211_ff_encap(struct ieee80211vap *vap, struct mbuf *m1, int hdrspace,
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struct ieee80211_key *key)
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{
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struct mbuf *m2;
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struct ether_header eh1, eh2;
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struct llc *llc;
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struct mbuf *m;
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int pad;
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m2 = m1->m_nextpkt;
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if (m2 == NULL) {
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
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"%s: only one frame\n", __func__);
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goto bad;
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}
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m1->m_nextpkt = NULL;
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/*
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* Include fast frame headers in adjusting header
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* layout; this allocates space according to what
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* ff_encap will do.
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*/
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m1 = ieee80211_mbuf_adjust(vap,
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hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 +
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sizeof(struct ether_header),
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key, m1);
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if (m1 == NULL) {
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/* NB: ieee80211_mbuf_adjust handles msgs+statistics */
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m_freem(m2);
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goto bad;
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}
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/*
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* Copy second frame's Ethernet header out of line
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* and adjust for encapsulation headers. Note that
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* we make room for padding in case there isn't room
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* at the end of first frame.
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*/
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KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!"));
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ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t));
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m2 = ieee80211_mbuf_adjust(vap,
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ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header),
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NULL, m2);
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if (m2 == NULL) {
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/* NB: ieee80211_mbuf_adjust handles msgs+statistics */
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goto bad;
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}
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/*
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* Now do tunnel encapsulation. First, each
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* frame gets a standard encapsulation.
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*/
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m1 = ff_encap1(vap, m1, &eh1);
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if (m1 == NULL)
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goto bad;
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m2 = ff_encap1(vap, m2, &eh2);
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if (m2 == NULL)
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goto bad;
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/*
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* Pad leading frame to a 4-byte boundary. If there
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* is space at the end of the first frame, put it
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* there; otherwise prepend to the front of the second
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* frame. We know doing the second will always work
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* because we reserve space above. We prefer appending
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* as this typically has better DMA alignment properties.
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*/
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for (m = m1; m->m_next != NULL; m = m->m_next)
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;
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pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len;
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if (pad) {
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if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */
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m2->m_data -= pad;
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m2->m_len += pad;
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m2->m_pkthdr.len += pad;
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} else { /* append to first */
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m->m_len += pad;
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m1->m_pkthdr.len += pad;
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}
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}
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/*
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* Now, stick 'em together and prepend the tunnel headers;
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* first the Atheros tunnel header (all zero for now) and
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* then a special fast frame LLC.
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*
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* XXX optimize by prepending together
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*/
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m->m_next = m2; /* NB: last mbuf from above */
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m1->m_pkthdr.len += m2->m_pkthdr.len;
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M_PREPEND(m1, sizeof(uint32_t)+2, M_DONTWAIT);
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if (m1 == NULL) { /* XXX cannot happen */
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
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"%s: no space for tunnel header\n", __func__);
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vap->iv_stats.is_tx_nobuf++;
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return NULL;
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}
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memset(mtod(m1, void *), 0, sizeof(uint32_t)+2);
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M_PREPEND(m1, sizeof(struct llc), M_DONTWAIT);
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if (m1 == NULL) { /* XXX cannot happen */
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
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"%s: no space for llc header\n", __func__);
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vap->iv_stats.is_tx_nobuf++;
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return NULL;
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}
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llc = mtod(m1, struct llc *);
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llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
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llc->llc_control = LLC_UI;
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llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0;
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llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1;
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llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2;
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llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE);
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vap->iv_stats.is_ff_encap++;
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return m1;
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bad:
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if (m1 != NULL)
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m_freem(m1);
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if (m2 != NULL)
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m_freem(m2);
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return NULL;
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}
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/*
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* Switch between turbo and non-turbo operating modes.
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* Use the specified channel flags to locate the new
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* channel, update 802.11 state, and then call back into
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* the driver to effect the change.
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*/
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void
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ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags)
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{
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struct ieee80211com *ic = vap->iv_ic;
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struct ieee80211_channel *chan;
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chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags);
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if (chan == NULL) { /* XXX should not happen */
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
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"%s: no channel with freq %u flags 0x%x\n",
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__func__, ic->ic_bsschan->ic_freq, newflags);
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return;
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}
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
|
|
"%s: %s -> %s (freq %u flags 0x%x)\n", __func__,
|
|
ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)],
|
|
ieee80211_phymode_name[ieee80211_chan2mode(chan)],
|
|
chan->ic_freq, chan->ic_flags);
|
|
|
|
ic->ic_bsschan = chan;
|
|
ic->ic_prevchan = ic->ic_curchan;
|
|
ic->ic_curchan = chan;
|
|
ic->ic_set_channel(ic);
|
|
/* NB: do not need to reset ERP state 'cuz we're in sta mode */
|
|
}
|
|
|
|
/*
|
|
* Return the current ``state'' of an Atheros capbility.
|
|
* If associated in station mode report the negotiated
|
|
* setting. Otherwise report the current setting.
|
|
*/
|
|
static int
|
|
getathcap(struct ieee80211vap *vap, int cap)
|
|
{
|
|
if (vap->iv_opmode == IEEE80211_M_STA &&
|
|
vap->iv_state == IEEE80211_S_RUN)
|
|
return IEEE80211_ATH_CAP(vap, vap->iv_bss, cap) != 0;
|
|
else
|
|
return (vap->iv_flags & cap) != 0;
|
|
}
|
|
|
|
static int
|
|
superg_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
|
|
{
|
|
switch (ireq->i_type) {
|
|
case IEEE80211_IOC_FF:
|
|
ireq->i_val = getathcap(vap, IEEE80211_F_FF);
|
|
break;
|
|
case IEEE80211_IOC_TURBOP:
|
|
ireq->i_val = getathcap(vap, IEEE80211_F_TURBOP);
|
|
break;
|
|
default:
|
|
return ENOSYS;
|
|
}
|
|
return 0;
|
|
}
|
|
IEEE80211_IOCTL_GET(superg, superg_ioctl_get80211);
|
|
|
|
static int
|
|
superg_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
|
|
{
|
|
switch (ireq->i_type) {
|
|
case IEEE80211_IOC_FF:
|
|
if (ireq->i_val) {
|
|
if ((vap->iv_caps & IEEE80211_C_FF) == 0)
|
|
return EOPNOTSUPP;
|
|
vap->iv_flags |= IEEE80211_F_FF;
|
|
} else
|
|
vap->iv_flags &= ~IEEE80211_F_FF;
|
|
return ERESTART;
|
|
case IEEE80211_IOC_TURBOP:
|
|
if (ireq->i_val) {
|
|
if ((vap->iv_caps & IEEE80211_C_TURBOP) == 0)
|
|
return EOPNOTSUPP;
|
|
vap->iv_flags |= IEEE80211_F_TURBOP;
|
|
} else
|
|
vap->iv_flags &= ~IEEE80211_F_TURBOP;
|
|
return ENETRESET;
|
|
default:
|
|
return ENOSYS;
|
|
}
|
|
return 0;
|
|
}
|
|
IEEE80211_IOCTL_SET(superg, superg_ioctl_set80211);
|