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when doing s/w crypto make sure work is done w/ a writable mbuf chain;

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this corrects problems with drivers that rely on the host to do
crypto (iwi, ipw, ral, ural, wi (hostap), awi)

Hard work by:	luigi, mlaier
Reviewed by:	luigi, mlaier
MFC after:	1 week
This commit is contained in:
Sam Leffler 2006-03-15 21:27:08 +00:00
parent 01eb65dbbf
commit 83a244dbe0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=156758
1 changed files with 15 additions and 0 deletions
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15
sys/net80211/ieee80211_output.c
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@ -384,6 +384,21 @@ ieee80211_mbuf_adjust(struct ieee80211com *ic, int hdrsize,
/* XXX belongs in crypto code? */
needed_space += key->wk_cipher->ic_header;
/* XXX frags */
/*
* When crypto is being done in the host we must insure
* the data are writable for the cipher routines; clone
* a writable mbuf chain.
* XXX handle SWMIC specially
*/
if (key->wk_flags & (IEEE80211_KEY_SWCRYPT|IEEE80211_KEY_SWMIC)) {
m = m_unshare(m, M_NOWAIT);
if (m == NULL) {
IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
"%s: cannot get writable mbuf\n", __func__);
ic->ic_stats.is_tx_nobuf++; /* XXX new stat */
return NULL;
}
}
}
/*
* We know we are called just before stripping an Ethernet