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[PATCH] orinoco: monitor mode support 

Patch from Pavel Roskin
This commit is contained in:
Christoph Hellwig 2005-06-19 01:28:06 +02:00 committed by Jeff Garzik
parent 8f2abf4430
commit 98c4cae1da
2 changed files with 180 additions and 29 deletions
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208
drivers/net/wireless/orinoco.c
View File

@ -499,6 +499,10 @@ static int ignore_disconnect; /* = 0 */
module_param(ignore_disconnect, int, 0644);
MODULE_PARM_DESC(ignore_disconnect, "Don't report lost link to the network layer");
static int force_monitor; /* = 0 */
module_param(force_monitor, int, 0644);
MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions");
/********************************************************************/
/* Compile time configuration and compatibility stuff */
/********************************************************************/
@ -670,6 +674,10 @@ static inline void set_port_type(struct orinoco_private *priv)
priv->createibss = 1;
}
break;
case IW_MODE_MONITOR:
priv->port_type = 3;
priv->createibss = 0;
break;
default:
printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n",
priv->ndev->name);
@ -856,7 +864,7 @@ static int orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
return 1;
}
if (! netif_carrier_ok(dev)) {
if (! netif_carrier_ok(dev) || (priv->iw_mode == IW_MODE_MONITOR)) {
/* Oops, the firmware hasn't established a connection,
silently drop the packet (this seems to be the
safest approach). */
@ -1118,6 +1126,117 @@ static void orinoco_stat_gather(struct net_device *dev,
}
}
/*
* orinoco_rx_monitor - handle received monitor frames.
*
* Arguments:
* dev network device
* rxfid received FID
* desc rx descriptor of the frame
*
* Call context: interrupt
*/
static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
struct hermes_rx_descriptor *desc)
{
u32 hdrlen = 30; /* return full header by default */
u32 datalen = 0;
u16 fc;
int err;
int len;
struct sk_buff *skb;
struct orinoco_private *priv = netdev_priv(dev);
struct net_device_stats *stats = &priv->stats;
hermes_t *hw = &priv->hw;
len = le16_to_cpu(desc->data_len);
/* Determine the size of the header and the data */
fc = le16_to_cpu(desc->frame_ctl);
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_DATA:
if ((fc & IEEE80211_FCTL_TODS)
&& (fc & IEEE80211_FCTL_FROMDS))
hdrlen = 30;
else
hdrlen = 24;
datalen = len;
break;
case IEEE80211_FTYPE_MGMT:
hdrlen = 24;
datalen = len;
break;
case IEEE80211_FTYPE_CTL:
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_PSPOLL:
case IEEE80211_STYPE_RTS:
case IEEE80211_STYPE_CFEND:
case IEEE80211_STYPE_CFENDACK:
hdrlen = 16;
break;
case IEEE80211_STYPE_CTS:
case IEEE80211_STYPE_ACK:
hdrlen = 10;
break;
}
break;
default:
/* Unknown frame type */
break;
}
/* sanity check the length */
if (datalen > IEEE80211_DATA_LEN + 12) {
printk(KERN_DEBUG "%s: oversized monitor frame, "
"data length = %d\n", dev->name, datalen);
err = -EIO;
stats->rx_length_errors++;
goto update_stats;
}
skb = dev_alloc_skb(hdrlen + datalen);
if (!skb) {
printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
dev->name);
err = -ENOMEM;
goto drop;
}
/* Copy the 802.11 header to the skb */
memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen);
skb->mac.raw = skb->data;
/* If any, copy the data from the card to the skb */
if (datalen > 0) {
err = hermes_bap_pread(hw, IRQ_BAP, skb_put(skb, datalen),
ALIGN(datalen, 2), rxfid,
HERMES_802_2_OFFSET);
if (err) {
printk(KERN_ERR "%s: error %d reading monitor frame\n",
dev->name, err);
goto drop;
}
}
skb->dev = dev;
skb->ip_summed = CHECKSUM_NONE;
skb->pkt_type = PACKET_OTHERHOST;
skb->protocol = __constant_htons(ETH_P_802_2);
dev->last_rx = jiffies;
stats->rx_packets++;
stats->rx_bytes += skb->len;
netif_rx(skb);
return;
drop:
dev_kfree_skb_irq(skb);
update_stats:
stats->rx_errors++;
stats->rx_dropped++;
}
static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
{
struct orinoco_private *priv = netdev_priv(dev);
@ -1137,24 +1256,29 @@ static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
if (err) {
printk(KERN_ERR "%s: error %d reading Rx descriptor. "
"Frame dropped.\n", dev->name, err);
stats->rx_errors++;
goto drop;
goto update_stats;
}
status = le16_to_cpu(desc.status);
if (status & HERMES_RXSTAT_ERR) {
if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
wstats->discard.code++;
DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
dev->name);
} else {
stats->rx_crc_errors++;
DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n", dev->name);
}
if (status & HERMES_RXSTAT_BADCRC) {
DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n",
dev->name);
stats->rx_crc_errors++;
goto update_stats;
}
stats->rx_errors++;
goto drop;
/* Handle frames in monitor mode */
if (priv->iw_mode == IW_MODE_MONITOR) {
orinoco_rx_monitor(dev, rxfid, &desc);
return;
}
if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
dev->name);
wstats->discard.code++;
goto update_stats;
}
length = le16_to_cpu(desc.data_len);
@ -1165,15 +1289,13 @@ static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
/* At least on Symbol firmware with PCF we get quite a
lot of these legitimately - Poll frames with no
data. */
stats->rx_dropped++;
goto drop;
return;
}
if (length > IEEE802_11_DATA_LEN) {
printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
dev->name, length);
stats->rx_length_errors++;
stats->rx_errors++;
goto drop;
goto update_stats;
}
/* We need space for the packet data itself, plus an ethernet
@ -1185,7 +1307,7 @@ static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
if (!skb) {
printk(KERN_WARNING "%s: Can't allocate skb for Rx\n",
dev->name);
goto drop;
goto update_stats;
}
/* We'll prepend the header, so reserve space for it. The worst
@ -1199,7 +1321,6 @@ static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
if (err) {
printk(KERN_ERR "%s: error %d reading frame. "
"Frame dropped.\n", dev->name, err);
stats->rx_errors++;
goto drop;
}
@ -1245,11 +1366,10 @@ static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
return;
drop:
dev_kfree_skb_irq(skb);
update_stats:
stats->rx_errors++;
stats->rx_dropped++;
if (skb)
dev_kfree_skb_irq(skb);
return;
}
/********************************************************************/
@ -2065,6 +2185,20 @@ static int __orinoco_program_rids(struct net_device *dev)
}
}
if (priv->iw_mode == IW_MODE_MONITOR) {
/* Enable monitor mode */
dev->type = ARPHRD_IEEE80211;
err = hermes_docmd_wait(hw, HERMES_CMD_TEST |
HERMES_TEST_MONITOR, 0, NULL);
} else {
/* Disable monitor mode */
dev->type = ARPHRD_ETHER;
err = hermes_docmd_wait(hw, HERMES_CMD_TEST |
HERMES_TEST_STOP, 0, NULL);
}
if (err)
return err;
/* Set promiscuity / multicast*/
priv->promiscuous = 0;
priv->mc_count = 0;
@ -2413,6 +2547,7 @@ static int determine_firmware(struct net_device *dev)
priv->has_pm = (firmver >= 0x40020); /* Don't work in 7.52 ? */
priv->ibss_port = 1;
priv->has_hostscan = (firmver >= 0x8000a);
priv->broken_monitor = (firmver >= 0x80000);
/* Tested with Agere firmware :
* 1.16 ; 4.08 ; 4.52 ; 6.04 ; 6.16 ; 7.28 => Jean II
@ -2980,6 +3115,15 @@ static int orinoco_ioctl_setmode(struct net_device *dev,
case IW_MODE_INFRA:
break;
case IW_MODE_MONITOR:
if (priv->broken_monitor && !force_monitor) {
printk(KERN_WARNING "%s: Monitor mode support is "
"buggy in this firmware, not enabling\n",
dev->name);
err = -EOPNOTSUPP;
}
break;
default:
err = -EOPNOTSUPP;
break;
@ -3355,11 +3499,9 @@ static int orinoco_ioctl_setfreq(struct net_device *dev,
unsigned long flags;
int err = -EINPROGRESS; /* Call commit handler */
/* We can only use this in Ad-Hoc demo mode to set the operating
* frequency, or in IBSS mode to set the frequency where the IBSS
* will be created - Jean II */
if (priv->iw_mode != IW_MODE_ADHOC)
return -EOPNOTSUPP;
/* In infrastructure mode the AP sets the channel */
if (priv->iw_mode == IW_MODE_INFRA)
return -EBUSY;
if ( (frq->e == 0) && (frq->m <= 1000) ) {
/* Setting by channel number */
@ -3383,7 +3525,15 @@ static int orinoco_ioctl_setfreq(struct net_device *dev,
if (orinoco_lock(priv, &flags) != 0)
return -EBUSY;
priv->channel = chan;
if (priv->iw_mode == IW_MODE_MONITOR) {
/* Fast channel change - no commit if successful */
hermes_t *hw = &priv->hw;
err = hermes_docmd_wait(hw, HERMES_CMD_TEST |
HERMES_TEST_SET_CHANNEL,
chan, NULL);
}
orinoco_unlock(priv, &flags);
return err;

1
drivers/net/wireless/orinoco.h
View File

@ -94,6 +94,7 @@ struct orinoco_private {
unsigned int has_sensitivity:1;
unsigned int has_hostscan:1;
unsigned int broken_disableport:1;
unsigned int broken_monitor:1;
/* Configuration paramaters */
u32 iw_mode;