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[PATCH] ieee80211: adds support for the creation of RTS packets

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tree b45c9c1017fd23216bfbe71e441aed9aa297fc84
parent 04aacdd71e904656a304d923bdcf57ad3bd2b254
author Ivo van Doorn <IvDoorn@gmail.com> 1124445405 -0500
committer James Ketrenos <jketreno@linux.intel.com> 1127313029 -0500

This patch adds support for the creation of RTS packets when the
config flag CFG_IEEE80211_RTS has been set.

Signed-Off-By: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: James Ketrenos <jketreno@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
James Ketrenos 2005-09-21 11:54:43 -05:00 committed by Jeff Garzik
parent ee34af37c0
commit 3cdd00c582
3 changed files with 41 additions and 3 deletions
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2
include/net/ieee80211.h
View File

@ -690,6 +690,7 @@ enum ieee80211_state {
#define CFG_IEEE80211_RESERVE_FCS (1<<0)
#define CFG_IEEE80211_COMPUTE_FCS (1<<1)
#define CFG_IEEE80211_RTS (1<<2)
struct ieee80211_device {
struct net_device *dev;
@ -747,6 +748,7 @@ struct ieee80211_device {
struct ieee80211_frag_entry frag_cache[IEEE80211_FRAG_CACHE_LEN];
unsigned int frag_next_idx;
u16 fts; /* Fragmentation Threshold */
u16 rts; /* RTS threshold */
/* Association info */
u8 bssid[ETH_ALEN];

1
net/ieee80211/ieee80211_module.c
View File

@ -126,6 +126,7 @@ struct net_device *alloc_ieee80211(int sizeof_priv)
/* Default fragmentation threshold is maximum payload size */
ieee->fts = DEFAULT_FTS;
ieee->rts = DEFAULT_FTS;
ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
ieee->open_wep = 1;

41
net/ieee80211/ieee80211_tx.c
View File

@ -222,13 +222,15 @@ static struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size,
return txb;
}
/* SKBs are added to the ieee->tx_queue. */
/* Incoming skb is converted to a txb which consist of
* a block of 802.11 fragment packets (stored as skbs) */
int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ieee80211_device *ieee = netdev_priv(dev);
struct ieee80211_txb *txb = NULL;
struct ieee80211_hdr_3addr *frag_hdr;
int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size,
rts_required;
unsigned long flags;
struct net_device_stats *stats = &ieee->stats;
int ether_type, encrypt, host_encrypt;
@ -334,6 +336,13 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
else
bytes_last_frag = bytes_per_frag;
rts_required = (frag_size > ieee->rts
&& ieee->config & CFG_IEEE80211_RTS);
if (rts_required)
nr_frags++;
else
bytes_last_frag = bytes_per_frag;
/* When we allocate the TXB we allocate enough space for the reserve
* and full fragment bytes (bytes_per_frag doesn't include prefix,
* postfix, header, FCS, etc.) */
@ -346,7 +355,33 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
txb->encrypted = encrypt;
txb->payload_size = bytes;
for (i = 0; i < nr_frags; i++) {
if (rts_required) {
skb_frag = txb->fragments[0];
frag_hdr =
(struct ieee80211_hdr_3addr *)skb_put(skb_frag, hdr_len);
/*
* Set header frame_ctl to the RTS.
*/
header.frame_ctl =
cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
memcpy(frag_hdr, &header, hdr_len);
/*
* Restore header frame_ctl to the original data setting.
*/
header.frame_ctl = cpu_to_le16(fc);
if (ieee->config &
(CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS))
skb_put(skb_frag, 4);
txb->rts_included = 1;
i = 1;
} else
i = 0;
for (; i < nr_frags; i++) {
skb_frag = txb->fragments[i];
if (host_encrypt)