On Friday 23 March 2007 20:21, Ivo van Doorn wrote:
> Most hardware can keep track of sequence numbers themselves,
> unfortunately *most* doesn't cover all devices. ;)
> This patch will keep track of the (per-bss) sequence number
> if the flag IEEE80211_HW_SOFTWARE_SEQUENCE has been set.
You should update the description as well. ;)
> This 4rd version of the patch has some minor code style fixes
> as suggested by Jiri.
>
> Signed-off-by: Ivo van Doorn <IvDoorn@xxxxxxxxx>
>
> ---
>
> diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
> index e7a613d..c06d1ce 100644
> --- a/net/mac80211/ieee80211.c
> +++ b/net/mac80211/ieee80211.c
> @@ -54,6 +54,16 @@ static u8 * ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len);
> static int ieee80211_mgmt_start_xmit(struct sk_buff *skb,
> struct net_device *dev);
>
> +static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data *sdata,
> + struct ieee80211_hdr *hdr)
> +{
> + /* Set the sequence number for this frame. */
> + hdr->seq_ctrl = cpu_to_le16(sdata->sequence);
> +
> + /* Increase the sequence number. */
> + sdata->sequence = (sdata->sequence + 0x10) & IEEE80211_SCTL_SEQ;
> +}
> +
> struct ieee80211_key_conf *
> ieee80211_key_data2conf(struct ieee80211_local *local,
> const struct ieee80211_key *data)
> @@ -445,6 +455,7 @@ ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx)
> size_t hdrlen, per_fragm, num_fragm, payload_len, left;
> struct sk_buff **frags, *first, *frag;
> int i;
> + u16 seq;
> u8 *pos;
> int frag_threshold = tx->local->fragmentation_threshold;
>
> @@ -463,6 +474,7 @@ ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx)
> goto fail;
>
> hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
> + seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ;
> pos = first->data + hdrlen + per_fragm;
> left = payload_len - per_fragm;
> for (i = 0; i < num_fragm - 1; i++) {
> @@ -490,7 +502,7 @@ ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx)
> memcpy(fhdr, first->data, hdrlen);
> if (i == num_fragm - 2)
> fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS);
> - fhdr->seq_ctrl = cpu_to_le16(i + 1);
> + fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG));
> copylen = left > per_fragm ? per_fragm : left;
> memcpy(skb_put(frag, copylen), pos, copylen);
>
> @@ -900,6 +912,16 @@ ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx)
> return TXRX_CONTINUE;
> }
>
> +static ieee80211_txrx_result
> +ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx)
> +{
> + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
> +
> + if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24)
> + ieee80211_include_sequence(tx->sdata, hdr);
> +
> + return TXRX_CONTINUE;
> +}
>
> /* This function is called whenever the AP is about to exceed the maximum limit
> * of buffered frames for power saving STAs. This situation should not really
> @@ -1770,6 +1792,8 @@ struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id,
> skb_reserve(skb, local->hw.extra_tx_headroom);
> memcpy(skb_put(skb, bh_len), b_head, bh_len);
>
> + ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data);
> +
> ieee80211_beacon_add_tim(local, ap, skb);
>
> if (b_tail) {
> @@ -4381,6 +4405,7 @@ static ieee80211_rx_handler ieee80211_rx_handlers[] =
> static ieee80211_tx_handler ieee80211_tx_handlers[] =
> {
> ieee80211_tx_h_check_assoc,
> + ieee80211_tx_h_sequence,
> ieee80211_tx_h_ps_buf,
> ieee80211_tx_h_select_key,
> ieee80211_tx_h_michael_mic_add,
> diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
> index 9df8ef0..4b7c427 100644
> --- a/net/mac80211/ieee80211_i.h
> +++ b/net/mac80211/ieee80211_i.h
> @@ -317,6 +317,8 @@ struct ieee80211_sub_if_data {
> int ieee802_1x; /* IEEE 802.1X PAE - drop packet to/from unauthorized
> * port */
>
> + u16 sequence;
> +
> /* Fragment table for host-based reassembly */
> struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
> unsigned int fragment_next;
>
>
--
Greetings Michael.
-
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