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mac80211: rewrite fragmentation

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Fragmentation currently uses an allocated array to store the
fragment skbs, and then keeps track of which have been sent
and which are still pending etc. This is rather complicated;
make it simpler by just chaining the fragments into skb->next
and removing from that list when sent. Also simplifies all
code that needs to touch fragments, since it now only needs
to walk the skb->next list.

This is a prerequisite for fixing the stored packet code,
which I need to do for proper aggregation packet storing.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2009-03-23 17:28:35 +01:00
committed by John W. Linville
parent 08df05aa9b
commit 2de8e0d999
5 changed files with 172 additions and 223 deletions
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28
net/mac80211/wpa.c
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@@ -196,19 +196,13 @@ ieee80211_tx_result
ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
{
struct sk_buff *skb = tx->skb;
int i;
ieee80211_tx_set_protected(tx);
if (tkip_encrypt_skb(tx, skb) < 0)
return TX_DROP;
if (tx->extra_frag) {
for (i = 0; i < tx->num_extra_frag; i++) {
if (tkip_encrypt_skb(tx, tx->extra_frag[i]))
return TX_DROP;
}
}
do {
if (tkip_encrypt_skb(tx, skb) < 0)
return TX_DROP;
} while ((skb = skb->next));
return TX_CONTINUE;
}
@@ -428,19 +422,13 @@ ieee80211_tx_result
ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx)
{
struct sk_buff *skb = tx->skb;
int i;
ieee80211_tx_set_protected(tx);
if (ccmp_encrypt_skb(tx, skb) < 0)
return TX_DROP;
if (tx->extra_frag) {
for (i = 0; i < tx->num_extra_frag; i++) {
if (ccmp_encrypt_skb(tx, tx->extra_frag[i]))
return TX_DROP;
}
}
do {
if (ccmp_encrypt_skb(tx, skb) < 0)
return TX_DROP;
} while ((skb = skb->next));
return TX_CONTINUE;
}