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net80211: initialize i_seq for A-MPDU frames.

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Fragment number field (part of i_seq) is used for AAD calculation;
as a result, without this patch every driver without h/w crypto support
need to clear it before ieee80211_crypto_encap().

Also fixes rtwn(4) A-MPDU Tx with dev.rtwn.%d.hwcrypto tunable
set to 0 (h/w crypto is disabled).

Tested with:
 * Intel 6205, STA mode.
 * RTL8188EU, STA mode.

Differential Revision:	https://reviews.freebsd.org/D10753
This commit is contained in:
Andriy Voskoboinyk 2017-06-01 20:46:43 +00:00
parent 71deb2bcf7
commit 2db223f902
1 changed files with 6 additions and 0 deletions
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6
sys/net80211/ieee80211_output.c
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@ -779,6 +779,9 @@ ieee80211_send_setup(
tap = &ni->ni_tx_ampdu[tid];
if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) {
m->m_flags |= M_AMPDU_MPDU;
/* NB: zero out i_seq field (for s/w encryption etc) */
*(uint16_t *)&wh->i_seq[0] = 0;
} else {
if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK,
type & IEEE80211_FC0_SUBTYPE_MASK))
@ -1610,6 +1613,9 @@ ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni,
*(uint16_t *)wh->i_seq =
htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
M_SEQNO_SET(m, seqno);
} else {
/* NB: zero out i_seq field (for s/w encryption etc) */
*(uint16_t *)wh->i_seq = 0;
}
} else {
/*