diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/ipw2200.c | 185 | ||||
| -rw-r--r-- | drivers/net/wireless/ipw2200.h | 1 |
2 files changed, 186 insertions, 0 deletions
diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c index 79697e8e8d96..86a4c2358f9d 100644 --- a/drivers/net/wireless/ipw2200.c +++ b/drivers/net/wireless/ipw2200.c @@ -7918,6 +7918,173 @@ static void ipw_handle_data_packet(struct ipw_priv *priv, } } +#ifdef CONFIG_IEEE80211_RADIOTAP +static void ipw_handle_data_packet_monitor(struct ipw_priv *priv, + struct ipw_rx_mem_buffer *rxb, + struct ieee80211_rx_stats *stats) +{ + struct ipw_rx_packet *pkt = (struct ipw_rx_packet *)rxb->skb->data; + struct ipw_rx_frame *frame = &pkt->u.frame; + + /* initial pull of some data */ + u16 received_channel = frame->received_channel; + u8 antennaAndPhy = frame->antennaAndPhy; + s8 antsignal = frame->rssi_dbm - IPW_RSSI_TO_DBM; /* call it signed anyhow */ + u16 pktrate = frame->rate; + + /* Magic struct that slots into the radiotap header -- no reason + * to build this manually element by element, we can write it much + * more efficiently than we can parse it. ORDER MATTERS HERE */ + struct ipw_rt_hdr { + struct ieee80211_radiotap_header rt_hdr; + u8 rt_flags; /* radiotap packet flags */ + u8 rt_rate; /* rate in 500kb/s */ + u16 rt_channel; /* channel in mhz */ + u16 rt_chbitmask; /* channel bitfield */ + s8 rt_dbmsignal; /* signal in dbM, kluged to signed */ + u8 rt_antenna; /* antenna number */ + } *ipw_rt; + + short len = le16_to_cpu(pkt->u.frame.length); + + /* We received data from the HW, so stop the watchdog */ + priv->net_dev->trans_start = jiffies; + + /* We only process data packets if the + * interface is open */ + if (unlikely((le16_to_cpu(pkt->u.frame.length) + IPW_RX_FRAME_SIZE) > + skb_tailroom(rxb->skb))) { + priv->ieee->stats.rx_errors++; + priv->wstats.discard.misc++; + IPW_DEBUG_DROP("Corruption detected! Oh no!\n"); + return; + } else if (unlikely(!netif_running(priv->net_dev))) { + priv->ieee->stats.rx_dropped++; + priv->wstats.discard.misc++; + IPW_DEBUG_DROP("Dropping packet while interface is not up.\n"); + return; + } + + /* Libpcap 0.9.3+ can handle variable length radiotap, so we'll use + * that now */ + if (len > IPW_RX_BUF_SIZE - sizeof(struct ipw_rt_hdr)) { + /* FIXME: Should alloc bigger skb instead */ + priv->ieee->stats.rx_dropped++; + priv->wstats.discard.misc++; + IPW_DEBUG_DROP("Dropping too large packet in monitor\n"); + return; + } + + /* copy the frame itself */ + memmove(rxb->skb->data + sizeof(struct ipw_rt_hdr), + rxb->skb->data + IPW_RX_FRAME_SIZE, len); + + /* Zero the radiotap static buffer ... We only need to zero the bytes NOT + * part of our real header, saves a little time. + * + * No longer necessary since we fill in all our data. Purge before merging + * patch officially. + * memset(rxb->skb->data + sizeof(struct ipw_rt_hdr), 0, + * IEEE80211_RADIOTAP_HDRLEN - sizeof(struct ipw_rt_hdr)); + */ + + ipw_rt = (struct ipw_rt_hdr *)rxb->skb->data; + + ipw_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION; + ipw_rt->rt_hdr.it_pad = 0; /* always good to zero */ + ipw_rt->rt_hdr.it_len = sizeof(struct ipw_rt_hdr); /* total header+data */ + + /* Big bitfield of all the fields we provide in radiotap */ + ipw_rt->rt_hdr.it_present = + ((1 << IEEE80211_RADIOTAP_FLAGS) | + (1 << IEEE80211_RADIOTAP_RATE) | + (1 << IEEE80211_RADIOTAP_CHANNEL) | + (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) | + (1 << IEEE80211_RADIOTAP_ANTENNA)); + + /* Zero the flags, we'll add to them as we go */ + ipw_rt->rt_flags = 0; + + /* Convert signal to DBM */ + ipw_rt->rt_dbmsignal = antsignal; + + /* Convert the channel data and set the flags */ + ipw_rt->rt_channel = cpu_to_le16(ieee80211chan2mhz(received_channel)); + if (received_channel > 14) { /* 802.11a */ + ipw_rt->rt_chbitmask = + cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ)); + } else if (antennaAndPhy & 32) { /* 802.11b */ + ipw_rt->rt_chbitmask = + cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ)); + } else { /* 802.11g */ + ipw_rt->rt_chbitmask = + (IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ); + } + + /* set the rate in multiples of 500k/s */ + switch (pktrate) { + case IPW_TX_RATE_1MB: + ipw_rt->rt_rate = 2; + break; + case IPW_TX_RATE_2MB: + ipw_rt->rt_rate = 4; + break; + case IPW_TX_RATE_5MB: + ipw_rt->rt_rate = 10; + break; + case IPW_TX_RATE_6MB: + ipw_rt->rt_rate = 12; + break; + case IPW_TX_RATE_9MB: + ipw_rt->rt_rate = 18; + break; + case IPW_TX_RATE_11MB: + ipw_rt->rt_rate = 22; + break; + case IPW_TX_RATE_12MB: + ipw_rt->rt_rate = 24; + break; + case IPW_TX_RATE_18MB: + ipw_rt->rt_rate = 36; + break; + case IPW_TX_RATE_24MB: + ipw_rt->rt_rate = 48; + break; + case IPW_TX_RATE_36MB: + ipw_rt->rt_rate = 72; + break; + case IPW_TX_RATE_48MB: + ipw_rt->rt_rate = 96; + break; + case IPW_TX_RATE_54MB: + ipw_rt->rt_rate = 108; + break; + default: + ipw_rt->rt_rate = 0; + break; + } + + /* antenna number */ + ipw_rt->rt_antenna = (antennaAndPhy & 3); /* Is this right? */ + + /* set the preamble flag if we have it */ + if ((antennaAndPhy & 64)) + ipw_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; + + /* Set the size of the skb to the size of the frame */ + skb_put(rxb->skb, len + sizeof(struct ipw_rt_hdr)); + + IPW_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len); + + if (!ieee80211_rx(priv->ieee, rxb->skb, stats)) + priv->ieee->stats.rx_errors++; + else { /* ieee80211_rx succeeded, so it now owns the SKB */ + rxb->skb = NULL; + /* no LED during capture */ + } +} +#endif + static inline int is_network_packet(struct ipw_priv *priv, struct ieee80211_hdr_4addr *header) { @@ -8147,8 +8314,14 @@ static void ipw_rx(struct ipw_priv *priv) #ifdef CONFIG_IPW2200_MONITOR if (priv->ieee->iw_mode == IW_MODE_MONITOR) { +#ifdef CONFIG_IEEE80211_RADIOTAP + ipw_handle_data_packet_monitor(priv, + rxb, + &stats); +#else ipw_handle_data_packet(priv, rxb, &stats); +#endif break; } #endif @@ -8315,7 +8488,11 @@ static int ipw_sw_reset(struct ipw_priv *priv, int init) #ifdef CONFIG_IPW2200_MONITOR case 2: priv->ieee->iw_mode = IW_MODE_MONITOR; +#ifdef CONFIG_IEEE80211_RADIOTAP + priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP; +#else priv->net_dev->type = ARPHRD_IEEE80211; +#endif break; #endif default: @@ -8565,7 +8742,11 @@ static int ipw_wx_set_mode(struct net_device *dev, priv->net_dev->type = ARPHRD_ETHER; if (wrqu->mode == IW_MODE_MONITOR) +#ifdef CONFIG_IEEE80211_RADIOTAP + priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP; +#else priv->net_dev->type = ARPHRD_IEEE80211; +#endif #endif /* CONFIG_IPW2200_MONITOR */ /* Free the existing firmware and reset the fw_loaded @@ -9598,7 +9779,11 @@ static int ipw_wx_set_monitor(struct net_device *dev, IPW_DEBUG_WX("SET MONITOR: %d %d\n", enable, parms[1]); if (enable) { if (priv->ieee->iw_mode != IW_MODE_MONITOR) { +#ifdef CONFIG_IEEE80211_RADIOTAP + priv->net_dev->type = ARPHRD_IEEE80211_RADIOTAP; +#else priv->net_dev->type = ARPHRD_IEEE80211; +#endif queue_work(priv->workqueue, &priv->adapter_restart); } diff --git a/drivers/net/wireless/ipw2200.h b/drivers/net/wireless/ipw2200.h index f2056b62254e..28f1216f8ea4 100644 --- a/drivers/net/wireless/ipw2200.h +++ b/drivers/net/wireless/ipw2200.h @@ -50,6 +50,7 @@ #include <asm/io.h> #include <net/ieee80211.h> +#include <net/ieee80211_radiotap.h> #define DRV_NAME "ipw2200" |