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Commit b2c258fb authored by Johannes Berg's avatar Johannes Berg Committed by David S. Miller
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[MAC80211]: reorder interface related functions 

This patch groups a whole bunch of functions together to make
ieee80211.c more maintainable.
Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJiri Benc <jbenc@suse.cz>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent ff688089
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Showing with 816 additions and 823 deletions
net/mac80211/ieee80211.c
View file @ b2c258fb
...@@ -61,95 +61,190 @@ struct ieee80211_tx_status_rtap_hdr { ...@@ -61,95 +61,190 @@ struct ieee80211_tx_status_rtap_hdr {
u8 data_retries; u8 data_retries;
} __attribute__ ((packed)); } __attribute__ ((packed));
/* common interface routines */
static int rate_list_match(const int *rate_list, int rate) static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
{ {
int i; struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
return &(sdata->stats);
}
if (!rate_list) static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
return 0; {
memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
return ETH_ALEN;
}
for (i = 0; rate_list[i] >= 0; i++) /* master interface */
if (rate_list[i] == rate)
return 1;
return 0; static int ieee80211_master_open(struct net_device *dev)
} {
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata;
int res = -EOPNOTSUPP;
read_lock(&local->sub_if_lock);
list_for_each_entry(sdata, &local->sub_if_list, list) {
if (sdata->dev != dev && netif_running(sdata->dev)) {
res = 0;
break;
}
}
read_unlock(&local->sub_if_lock);
return res;
}
void ieee80211_prepare_rates(struct ieee80211_local *local, static int ieee80211_master_stop(struct net_device *dev)
struct ieee80211_hw_mode *mode)
{ {
int i; struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata;
for (i = 0; i < mode->num_rates; i++) { read_lock(&local->sub_if_lock);
struct ieee80211_rate *rate = &mode->rates[i]; list_for_each_entry(sdata, &local->sub_if_list, list)
if (sdata->dev != dev && netif_running(sdata->dev))
dev_close(sdata->dev);
read_unlock(&local->sub_if_lock);
rate->flags &= ~(IEEE80211_RATE_SUPPORTED | return 0;
IEEE80211_RATE_BASIC); }
if (local->supp_rates[mode->mode]) { /* management interface */
if (!rate_list_match(local->supp_rates[mode->mode],
rate->rate))
continue;
}
rate->flags |= IEEE80211_RATE_SUPPORTED; static void
ieee80211_fill_frame_info(struct ieee80211_local *local,
struct ieee80211_frame_info *fi,
struct ieee80211_rx_status *status)
{
if (status) {
struct timespec ts;
struct ieee80211_rate *rate;
/* Use configured basic rate set if it is available. If not, jiffies_to_timespec(jiffies, &ts);
* use defaults that are sane for most cases. */ fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
if (local->basic_rates[mode->mode]) { ts.tv_nsec / 1000);
if (rate_list_match(local->basic_rates[mode->mode], fi->mactime = cpu_to_be64(status->mactime);
rate->rate)) switch (status->phymode) {
rate->flags |= IEEE80211_RATE_BASIC;
} else switch (mode->mode) {
case MODE_IEEE80211A: case MODE_IEEE80211A:
if (rate->rate == 60 || rate->rate == 120 || fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
rate->rate == 240)
rate->flags |= IEEE80211_RATE_BASIC;
break; break;
case MODE_IEEE80211B: case MODE_IEEE80211B:
if (rate->rate == 10 || rate->rate == 20) fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
rate->flags |= IEEE80211_RATE_BASIC;
break;
case MODE_ATHEROS_TURBO:
if (rate->rate == 120 || rate->rate == 240 ||
rate->rate == 480)
rate->flags |= IEEE80211_RATE_BASIC;
break; break;
case MODE_IEEE80211G: case MODE_IEEE80211G:
if (rate->rate == 10 || rate->rate == 20 || fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
rate->rate == 55 || rate->rate == 110)
rate->flags |= IEEE80211_RATE_BASIC;
break;
}
/* Set ERP and MANDATORY flags based on phymode */
switch (mode->mode) {
case MODE_IEEE80211A:
if (rate->rate == 60 || rate->rate == 120 ||
rate->rate == 240)
rate->flags |= IEEE80211_RATE_MANDATORY;
break;
case MODE_IEEE80211B:
if (rate->rate == 10)
rate->flags |= IEEE80211_RATE_MANDATORY;
break; break;
case MODE_ATHEROS_TURBO: case MODE_ATHEROS_TURBO:
fi->phytype =
htonl(ieee80211_phytype_dsss_dot11_turbo);
break; break;
case MODE_IEEE80211G: default:
if (rate->rate == 10 || rate->rate == 20 || fi->phytype = htonl(0xAAAAAAAA);
rate->rate == 55 || rate->rate == 110 ||
rate->rate == 60 || rate->rate == 120 ||
rate->rate == 240)
rate->flags |= IEEE80211_RATE_MANDATORY;
break; break;
} }
if (ieee80211_is_erp_rate(mode->mode, rate->rate)) fi->channel = htonl(status->channel);
rate->flags |= IEEE80211_RATE_ERP; rate = ieee80211_get_rate(local, status->phymode,
status->rate);
if (rate) {
fi->datarate = htonl(rate->rate);
if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
if (status->rate == rate->val)
fi->preamble = htonl(2); /* long */
else if (status->rate == rate->val2)
fi->preamble = htonl(1); /* short */
} else
fi->preamble = htonl(0);
} else {
fi->datarate = htonl(0);
fi->preamble = htonl(0);
}
fi->antenna = htonl(status->antenna);
fi->priority = htonl(0xffffffff); /* no clue */
fi->ssi_type = htonl(ieee80211_ssi_raw);
fi->ssi_signal = htonl(status->ssi);
fi->ssi_noise = 0x00000000;
fi->encoding = 0;
} else {
/* clear everything because we really don't know.
* the msg_type field isn't present on monitor frames
* so we don't know whether it will be present or not,
* but it's ok to not clear it since it'll be assigned
* anyway */
memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
fi->ssi_type = htonl(ieee80211_ssi_none);
}
fi->version = htonl(IEEE80211_FI_VERSION);
fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
}
/* this routine is actually not just for this, but also
* for pushing fake 'management' frames into userspace.
* it shall be replaced by a netlink-based system. */
void
ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
struct ieee80211_rx_status *status, u32 msg_type)
{
struct ieee80211_frame_info *fi;
const size_t hlen = sizeof(struct ieee80211_frame_info);
struct ieee80211_sub_if_data *sdata;
skb->dev = local->apdev;
sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
if (skb_headroom(skb) < hlen) {
I802_DEBUG_INC(local->rx_expand_skb_head);
if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
dev_kfree_skb(skb);
return;
}
} }
fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
ieee80211_fill_frame_info(local, fi, status);
fi->msg_type = htonl(msg_type);
sdata->stats.rx_packets++;
sdata->stats.rx_bytes += skb->len;
skb_set_mac_header(skb, 0);
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->pkt_type = PACKET_OTHERHOST;
skb->protocol = htons(ETH_P_802_2);
memset(skb->cb, 0, sizeof(skb->cb));
netif_rx(skb);
} }
int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
int radar, int radar_type)
{
struct sk_buff *skb;
struct ieee80211_radar_info *msg;
struct ieee80211_local *local = hw_to_local(hw);
if (!local->apdev)
return 0;
skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
sizeof(struct ieee80211_radar_info));
if (!skb)
return -ENOMEM;
skb_reserve(skb, sizeof(struct ieee80211_frame_info));
msg = (struct ieee80211_radar_info *)
skb_put(skb, sizeof(struct ieee80211_radar_info));
msg->channel = channel;
msg->radar = radar;
msg->radar_type = radar_type;
ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
return 0;
}
EXPORT_SYMBOL(ieee80211_radar_status);
void ieee80211_key_threshold_notify(struct net_device *dev, void ieee80211_key_threshold_notify(struct net_device *dev,
struct ieee80211_key *key, struct ieee80211_key *key,
...@@ -186,389 +281,277 @@ void ieee80211_key_threshold_notify(struct net_device *dev, ...@@ -186,389 +281,277 @@ void ieee80211_key_threshold_notify(struct net_device *dev,
ieee80211_msg_key_threshold_notification); ieee80211_msg_key_threshold_notification);
} }
static int ieee80211_mgmt_open(struct net_device *dev)
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len)
{ {
u16 fc; struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
if (len < 24)
return NULL;
fc = le16_to_cpu(hdr->frame_control);
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_DATA:
switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
case IEEE80211_FCTL_TODS:
return hdr->addr1;
case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
return NULL;
case IEEE80211_FCTL_FROMDS:
return hdr->addr2;
case 0:
return hdr->addr3;
}
break;
case IEEE80211_FTYPE_MGMT:
return hdr->addr3;
case IEEE80211_FTYPE_CTL:
if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)
return hdr->addr1;
else
return NULL;
}
return NULL; if (!netif_running(local->mdev))
return -EOPNOTSUPP;
return 0;
} }
int ieee80211_get_hdrlen(u16 fc) static int ieee80211_mgmt_stop(struct net_device *dev)
{ {
int hdrlen = 24; return 0;
}
switch (fc & IEEE80211_FCTL_FTYPE) { static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
case IEEE80211_FTYPE_DATA: {
if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS)) /* FIX: what would be proper limits for MTU?
hdrlen = 30; /* Addr4 */ * This interface uses 802.11 frames. */
/* if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
* The QoS Control field is two bytes and its presence is printk(KERN_WARNING "%s: invalid MTU %d\n",
* indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to dev->name, new_mtu);
* hdrlen if that bit is set. return -EINVAL;
* This works by masking out the bit and shifting it to
* bit position 1 so the result has the value 0 or 2.
*/
hdrlen += (fc & IEEE80211_STYPE_QOS_DATA)
>> (ilog2(IEEE80211_STYPE_QOS_DATA)-1);
break;
case IEEE80211_FTYPE_CTL:
/*
* ACK and CTS are 10 bytes, all others 16. To see how
* to get this condition consider
* subtype mask: 0b0000000011110000 (0x00F0)
* ACK subtype: 0b0000000011010000 (0x00D0)
* CTS subtype: 0b0000000011000000 (0x00C0)
* bits that matter: ^^^ (0x00E0)
* value of those: 0b0000000011000000 (0x00C0)
*/
if ((fc & 0xE0) == 0xC0)
hdrlen = 10;
else
hdrlen = 16;
break;
} }
return hdrlen; #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
dev->mtu = new_mtu;
return 0;
} }
EXPORT_SYMBOL(ieee80211_get_hdrlen);
int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) void ieee80211_if_mgmt_setup(struct net_device *dev)
{ {
const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data; ether_setup(dev);
int hdrlen; dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
dev->change_mtu = ieee80211_change_mtu_apdev;
if (unlikely(skb->len < 10)) dev->get_stats = ieee80211_get_stats;
return 0; dev->open = ieee80211_mgmt_open;
hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)); dev->stop = ieee80211_mgmt_stop;
if (unlikely(hdrlen > skb->len)) dev->type = ARPHRD_IEEE80211_PRISM;
return 0; dev->hard_header_parse = header_parse_80211;
return hdrlen; dev->uninit = ieee80211_if_reinit;
dev->destructor = ieee80211_if_free;
} }
EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
/* regular interfaces */
int ieee80211_is_eapol(const struct sk_buff *skb) static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
{ {
const struct ieee80211_hdr *hdr; /* FIX: what would be proper limits for MTU?
u16 fc; * This interface uses 802.3 frames. */
int hdrlen; if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
printk(KERN_WARNING "%s: invalid MTU %d\n",
if (unlikely(skb->len < 10)) dev->name, new_mtu);
return 0; return -EINVAL;
}
hdr = (const struct ieee80211_hdr *) skb->data;
fc = le16_to_cpu(hdr->frame_control);
if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
return 0;
hdrlen = ieee80211_get_hdrlen(fc);
if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) &&
memcmp(skb->data + hdrlen, eapol_header,
sizeof(eapol_header)) == 0))
return 1;
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
dev->mtu = new_mtu;
return 0; return 0;
} }
static inline int identical_mac_addr_allowed(int type1, int type2)
{
return (type1 == IEEE80211_IF_TYPE_MNTR ||
type2 == IEEE80211_IF_TYPE_MNTR ||
(type1 == IEEE80211_IF_TYPE_AP &&
type2 == IEEE80211_IF_TYPE_WDS) ||
(type1 == IEEE80211_IF_TYPE_WDS &&
(type2 == IEEE80211_IF_TYPE_WDS ||
type2 == IEEE80211_IF_TYPE_AP)) ||
(type1 == IEEE80211_IF_TYPE_AP &&
type2 == IEEE80211_IF_TYPE_VLAN) ||
(type1 == IEEE80211_IF_TYPE_VLAN &&
(type2 == IEEE80211_IF_TYPE_AP ||
type2 == IEEE80211_IF_TYPE_VLAN)));
}
void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx) /* Check if running monitor interfaces should go to a "soft monitor" mode
* and switch them if necessary. */
static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
{ {
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; struct ieee80211_if_init_conf conf;
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); if (local->open_count && local->open_count == local->monitors &&
if (tx->u.tx.extra_frag) { !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
struct ieee80211_hdr *fhdr; local->ops->remove_interface) {
int i; conf.if_id = -1;
for (i = 0; i < tx->u.tx.num_extra_frag; i++) { conf.type = IEEE80211_IF_TYPE_MNTR;
fhdr = (struct ieee80211_hdr *) conf.mac_addr = NULL;
tx->u.tx.extra_frag[i]->data; local->ops->remove_interface(local_to_hw(local), &conf);
fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
}
} }
} }
/* Check if running monitor interfaces should go to a "hard monitor" mode
static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, * and switch them if necessary. */
int rate, int erp, int short_preamble) static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
{ {
int dur; struct ieee80211_if_init_conf conf;
/* calculate duration (in microseconds, rounded up to next higher
* integer if it includes a fractional microsecond) to send frame of
* len bytes (does not include FCS) at the given rate. Duration will
* also include SIFS.
*
* rate is in 100 kbps, so divident is multiplied by 10 in the
* DIV_ROUND_UP() operations.
*/
if (local->hw.conf.phymode == MODE_IEEE80211A || erp ||
local->hw.conf.phymode == MODE_ATHEROS_TURBO) {
/*
* OFDM:
*
* N_DBPS = DATARATE x 4
* N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
* (16 = SIGNAL time, 6 = tail bits)
* TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
*
* T_SYM = 4 usec
* 802.11a - 17.5.2: aSIFSTime = 16 usec
* 802.11g - 19.8.4: aSIFSTime = 10 usec +
* signal ext = 6 usec
*/
/* FIX: Atheros Turbo may have different (shorter) duration? */
dur = 16; /* SIFS + signal ext */
dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
4 * rate); /* T_SYM x N_SYM */
} else {
/*
* 802.11b or 802.11g with 802.11b compatibility:
* 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
* Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
*
* 802.11 (DS): 15.3.3, 802.11b: 18.3.4
* aSIFSTime = 10 usec
* aPreambleLength = 144 usec or 72 usec with short preamble
* aPLCPHeaderLength = 48 usec or 24 usec with short preamble
*/
dur = 10; /* aSIFSTime = 10 usec */
dur += short_preamble ? (72 + 24) : (144 + 48);
dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); if (local->open_count && local->open_count == local->monitors &&
!(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
conf.if_id = -1;
conf.type = IEEE80211_IF_TYPE_MNTR;
conf.mac_addr = NULL;
local->ops->add_interface(local_to_hw(local), &conf);
} }
return dur;
} }
static int ieee80211_open(struct net_device *dev)
/* Exported duration function for driver use */
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
size_t frame_len, int rate)
{ {
struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_sub_if_data *sdata, *nsdata;
u16 dur; struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
int erp; struct ieee80211_if_init_conf conf;
int res;
erp = ieee80211_is_erp_rate(hw->conf.phymode, rate);
dur = ieee80211_frame_duration(local, frame_len, rate,
erp, local->short_preamble);
return cpu_to_le16(dur); sdata = IEEE80211_DEV_TO_SUB_IF(dev);
} read_lock(&local->sub_if_lock);
EXPORT_SYMBOL(ieee80211_generic_frame_duration); list_for_each_entry(nsdata, &local->sub_if_list, list) {
struct net_device *ndev = nsdata->dev;
if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
!identical_mac_addr_allowed(sdata->type, nsdata->type)) {
read_unlock(&local->sub_if_lock);
return -ENOTUNIQ;
}
}
read_unlock(&local->sub_if_lock);
__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, if (sdata->type == IEEE80211_IF_TYPE_WDS &&
size_t frame_len, is_zero_ether_addr(sdata->u.wds.remote_addr))
const struct ieee80211_tx_control *frame_txctl) return -ENOLINK;
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_rate *rate;
int short_preamble = local->short_preamble;
int erp;
u16 dur;
rate = frame_txctl->rts_rate; if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
erp = !!(rate->flags & IEEE80211_RATE_ERP); !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
/* run the interface in a "soft monitor" mode */
/* CTS duration */ local->monitors++;
dur = ieee80211_frame_duration(local, 10, rate->rate, local->open_count++;
erp, short_preamble); local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
/* Data frame duration */ return 0;
dur += ieee80211_frame_duration(local, frame_len, rate->rate, }
erp, short_preamble); ieee80211_start_soft_monitor(local);
/* ACK duration */
dur += ieee80211_frame_duration(local, 10, rate->rate,
erp, short_preamble);
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_rts_duration);
conf.if_id = dev->ifindex;
conf.type = sdata->type;
conf.mac_addr = dev->dev_addr;
res = local->ops->add_interface(local_to_hw(local), &conf);
if (res) {
if (sdata->type == IEEE80211_IF_TYPE_MNTR)
ieee80211_start_hard_monitor(local);
return res;
}
__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, if (local->open_count == 0) {
size_t frame_len, res = 0;
const struct ieee80211_tx_control *frame_txctl) tasklet_enable(&local->tx_pending_tasklet);
{ tasklet_enable(&local->tasklet);
struct ieee80211_local *local = hw_to_local(hw); if (local->ops->open)
struct ieee80211_rate *rate; res = local->ops->open(local_to_hw(local));
int short_preamble = local->short_preamble; if (res == 0) {
int erp; res = dev_open(local->mdev);
u16 dur; if (res) {
if (local->ops->stop)
local->ops->stop(local_to_hw(local));
} else {
res = ieee80211_hw_config(local);
if (res && local->ops->stop)
local->ops->stop(local_to_hw(local));
else if (!res && local->apdev)
dev_open(local->apdev);
}
}
if (res) {
if (local->ops->remove_interface)
local->ops->remove_interface(local_to_hw(local),
&conf);
return res;
}
}
local->open_count++;
rate = frame_txctl->rts_rate; if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
erp = !!(rate->flags & IEEE80211_RATE_ERP); local->monitors++;
local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
} else
ieee80211_if_config(dev);
/* Data frame duration */ if (sdata->type == IEEE80211_IF_TYPE_STA &&
dur = ieee80211_frame_duration(local, frame_len, rate->rate, !local->user_space_mlme)
erp, short_preamble); netif_carrier_off(dev);
if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) { else
/* ACK duration */ netif_carrier_on(dev);
dur += ieee80211_frame_duration(local, 10, rate->rate,
erp, short_preamble);
}
return cpu_to_le16(dur); netif_start_queue(dev);
return 0;
} }
EXPORT_SYMBOL(ieee80211_ctstoself_duration);
static int __ieee80211_if_config(struct net_device *dev, static void ieee80211_if_shutdown(struct net_device *dev)
struct sk_buff *beacon,
struct ieee80211_tx_control *control)
{ {
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_if_conf conf; struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
if (!local->ops->config_interface || !netif_running(dev))
return 0;
memset(&conf, 0, sizeof(conf)); ASSERT_RTNL();
conf.type = sdata->type; switch (sdata->type) {
if (sdata->type == IEEE80211_IF_TYPE_STA || case IEEE80211_IF_TYPE_STA:
sdata->type == IEEE80211_IF_TYPE_IBSS) { case IEEE80211_IF_TYPE_IBSS:
if (local->sta_scanning && sdata->u.sta.state = IEEE80211_DISABLED;
local->scan_dev == dev) del_timer_sync(&sdata->u.sta.timer);
conf.bssid = scan_bssid; skb_queue_purge(&sdata->u.sta.skb_queue);
else if (!local->ops->hw_scan &&
conf.bssid = sdata->u.sta.bssid; local->scan_dev == sdata->dev) {
conf.ssid = sdata->u.sta.ssid; local->sta_scanning = 0;
conf.ssid_len = sdata->u.sta.ssid_len; cancel_delayed_work(&local->scan_work);
conf.generic_elem = sdata->u.sta.extra_ie; }
conf.generic_elem_len = sdata->u.sta.extra_ie_len; flush_workqueue(local->hw.workqueue);
} else if (sdata->type == IEEE80211_IF_TYPE_AP) { break;
conf.ssid = sdata->u.ap.ssid;
conf.ssid_len = sdata->u.ap.ssid_len;
conf.generic_elem = sdata->u.ap.generic_elem;
conf.generic_elem_len = sdata->u.ap.generic_elem_len;
conf.beacon = beacon;
conf.beacon_control = control;
} }
return local->ops->config_interface(local_to_hw(local),
dev->ifindex, &conf);
}
int ieee80211_if_config(struct net_device *dev)
{
return __ieee80211_if_config(dev, NULL, NULL);
} }
int ieee80211_if_config_beacon(struct net_device *dev) static int ieee80211_stop(struct net_device *dev)
{ {
struct ieee80211_sub_if_data *sdata;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_tx_control control;
struct sk_buff *skb;
if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
return 0;
skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
if (!skb)
return -ENOMEM;
return __ieee80211_if_config(dev, skb, &control);
}
int ieee80211_hw_config(struct ieee80211_local *local) sdata = IEEE80211_DEV_TO_SUB_IF(dev);
{
struct ieee80211_hw_mode *mode;
struct ieee80211_channel *chan;
int ret = 0;
if (local->sta_scanning) { if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
chan = local->scan_channel; local->open_count > 1 &&
mode = local->scan_hw_mode; !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
} else { /* remove "soft monitor" interface */
chan = local->oper_channel; local->open_count--;
mode = local->oper_hw_mode; local->monitors--;
if (!local->monitors)
local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
return 0;
} }
local->hw.conf.channel = chan->chan; netif_stop_queue(dev);
local->hw.conf.channel_val = chan->val; ieee80211_if_shutdown(dev);
local->hw.conf.power_level = chan->power_level;
local->hw.conf.freq = chan->freq;
local->hw.conf.phymode = mode->mode;
local->hw.conf.antenna_max = chan->antenna_max;
local->hw.conf.chan = chan;
local->hw.conf.mode = mode;
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
"phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
local->hw.conf.phymode);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
if (local->ops->config)
ret = local->ops->config(local_to_hw(local), &local->hw.conf);
return ret;
}
static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
{ local->monitors--;
/* FIX: what would be proper limits for MTU? if (!local->monitors)
* This interface uses 802.3 frames. */ local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
printk(KERN_WARNING "%s: invalid MTU %d\n",
dev->name, new_mtu);
return -EINVAL;
} }
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG local->open_count--;
printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); if (local->open_count == 0) {
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ if (netif_running(local->mdev))
dev->mtu = new_mtu; dev_close(local->mdev);
return 0; if (local->apdev)
} dev_close(local->apdev);
if (local->ops->stop)
local->ops->stop(local_to_hw(local));
tasklet_disable(&local->tx_pending_tasklet);
tasklet_disable(&local->tasklet);
}
if (local->ops->remove_interface) {
struct ieee80211_if_init_conf conf;
static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu) conf.if_id = dev->ifindex;
{ conf.type = sdata->type;
/* FIX: what would be proper limits for MTU? conf.mac_addr = dev->dev_addr;
* This interface uses 802.11 frames. */ local->ops->remove_interface(local_to_hw(local), &conf);
if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
printk(KERN_WARNING "%s: invalid MTU %d\n",
dev->name, new_mtu);
return -EINVAL;
} }
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG ieee80211_start_hard_monitor(local);
printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
dev->mtu = new_mtu;
return 0; return 0;
} }
...@@ -627,306 +610,518 @@ static void ieee80211_set_multicast_list(struct net_device *dev) ...@@ -627,306 +610,518 @@ static void ieee80211_set_multicast_list(struct net_device *dev)
netif_tx_unlock(local->mdev); netif_tx_unlock(local->mdev);
} }
struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw, /* Must not be called for mdev and apdev */
struct dev_mc_list *prev, void ieee80211_if_setup(struct net_device *dev)
void **ptr)
{ {
struct ieee80211_local *local = hw_to_local(hw); ether_setup(dev);
struct ieee80211_sub_if_data *sdata = *ptr; dev->hard_start_xmit = ieee80211_subif_start_xmit;
struct dev_mc_list *mc; dev->wireless_handlers = &ieee80211_iw_handler_def;
dev->set_multicast_list = ieee80211_set_multicast_list;
if (!prev) { dev->change_mtu = ieee80211_change_mtu;
WARN_ON(sdata); dev->get_stats = ieee80211_get_stats;
sdata = NULL; dev->open = ieee80211_open;
} dev->stop = ieee80211_stop;
if (!prev || !prev->next) { dev->uninit = ieee80211_if_reinit;
if (sdata) dev->destructor = ieee80211_if_free;
sdata = list_entry(sdata->list.next, }
struct ieee80211_sub_if_data, list);
else
sdata = list_entry(local->sub_if_list.next,
struct ieee80211_sub_if_data, list);
if (&sdata->list != &local->sub_if_list)
mc = sdata->dev->mc_list;
else
mc = NULL;
} else
mc = prev->next;
*ptr = sdata; /* WDS specialties */
return mc;
int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct sta_info *sta;
if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
return 0;
/* Create STA entry for the new peer */
sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
if (!sta)
return -ENOMEM;
sta_info_put(sta);
/* Remove STA entry for the old peer */
sta = sta_info_get(local, sdata->u.wds.remote_addr);
if (sta) {
sta_info_put(sta);
sta_info_free(sta, 0);
} else {
printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
"peer " MAC_FMT "\n",
dev->name, MAC_ARG(sdata->u.wds.remote_addr));
}
/* Update WDS link data */
memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
return 0;
} }
EXPORT_SYMBOL(ieee80211_get_mc_list_item);
static struct net_device_stats *ieee80211_get_stats(struct net_device *dev) /* everything else */
static int rate_list_match(const int *rate_list, int rate)
{ {
struct ieee80211_sub_if_data *sdata; int i;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
return &(sdata->stats); if (!rate_list)
return 0;
for (i = 0; rate_list[i] >= 0; i++)
if (rate_list[i] == rate)
return 1;
return 0;
} }
static void ieee80211_if_shutdown(struct net_device *dev) void ieee80211_prepare_rates(struct ieee80211_local *local,
struct ieee80211_hw_mode *mode)
{ {
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); int i;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
ASSERT_RTNL(); for (i = 0; i < mode->num_rates; i++) {
switch (sdata->type) { struct ieee80211_rate *rate = &mode->rates[i];
case IEEE80211_IF_TYPE_STA:
case IEEE80211_IF_TYPE_IBSS: rate->flags &= ~(IEEE80211_RATE_SUPPORTED |
sdata->u.sta.state = IEEE80211_DISABLED; IEEE80211_RATE_BASIC);
del_timer_sync(&sdata->u.sta.timer);
skb_queue_purge(&sdata->u.sta.skb_queue); if (local->supp_rates[mode->mode]) {
if (!local->ops->hw_scan && if (!rate_list_match(local->supp_rates[mode->mode],
local->scan_dev == sdata->dev) { rate->rate))
local->sta_scanning = 0; continue;
cancel_delayed_work(&local->scan_work); }
rate->flags |= IEEE80211_RATE_SUPPORTED;
/* Use configured basic rate set if it is available. If not,
* use defaults that are sane for most cases. */
if (local->basic_rates[mode->mode]) {
if (rate_list_match(local->basic_rates[mode->mode],
rate->rate))
rate->flags |= IEEE80211_RATE_BASIC;
} else switch (mode->mode) {
case MODE_IEEE80211A:
if (rate->rate == 60 || rate->rate == 120 ||
rate->rate == 240)
rate->flags |= IEEE80211_RATE_BASIC;
break;
case MODE_IEEE80211B:
if (rate->rate == 10 || rate->rate == 20)
rate->flags |= IEEE80211_RATE_BASIC;
break;
case MODE_ATHEROS_TURBO:
if (rate->rate == 120 || rate->rate == 240 ||
rate->rate == 480)
rate->flags |= IEEE80211_RATE_BASIC;
break;
case MODE_IEEE80211G:
if (rate->rate == 10 || rate->rate == 20 ||
rate->rate == 55 || rate->rate == 110)
rate->flags |= IEEE80211_RATE_BASIC;
break;
}
/* Set ERP and MANDATORY flags based on phymode */
switch (mode->mode) {
case MODE_IEEE80211A:
if (rate->rate == 60 || rate->rate == 120 ||
rate->rate == 240)
rate->flags |= IEEE80211_RATE_MANDATORY;
break;
case MODE_IEEE80211B:
if (rate->rate == 10)
rate->flags |= IEEE80211_RATE_MANDATORY;
break;
case MODE_ATHEROS_TURBO:
break;
case MODE_IEEE80211G:
if (rate->rate == 10 || rate->rate == 20 ||
rate->rate == 55 || rate->rate == 110 ||
rate->rate == 60 || rate->rate == 120 ||
rate->rate == 240)
rate->flags |= IEEE80211_RATE_MANDATORY;
break;
}
if (ieee80211_is_erp_rate(mode->mode, rate->rate))
rate->flags |= IEEE80211_RATE_ERP;
}
}
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len)
{
u16 fc;
if (len < 24)
return NULL;
fc = le16_to_cpu(hdr->frame_control);
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_DATA:
switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
case IEEE80211_FCTL_TODS:
return hdr->addr1;
case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
return NULL;
case IEEE80211_FCTL_FROMDS:
return hdr->addr2;
case 0:
return hdr->addr3;
} }
flush_workqueue(local->hw.workqueue);
break; break;
case IEEE80211_FTYPE_MGMT:
return hdr->addr3;
case IEEE80211_FTYPE_CTL:
if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)
return hdr->addr1;
else
return NULL;
} }
return NULL;
} }
static inline int identical_mac_addr_allowed(int type1, int type2) int ieee80211_get_hdrlen(u16 fc)
{ {
return (type1 == IEEE80211_IF_TYPE_MNTR || int hdrlen = 24;
type2 == IEEE80211_IF_TYPE_MNTR ||
(type1 == IEEE80211_IF_TYPE_AP && switch (fc & IEEE80211_FCTL_FTYPE) {
type2 == IEEE80211_IF_TYPE_WDS) || case IEEE80211_FTYPE_DATA:
(type1 == IEEE80211_IF_TYPE_WDS && if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
(type2 == IEEE80211_IF_TYPE_WDS || hdrlen = 30; /* Addr4 */
type2 == IEEE80211_IF_TYPE_AP)) || /*
(type1 == IEEE80211_IF_TYPE_AP && * The QoS Control field is two bytes and its presence is
type2 == IEEE80211_IF_TYPE_VLAN) || * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to
(type1 == IEEE80211_IF_TYPE_VLAN && * hdrlen if that bit is set.
(type2 == IEEE80211_IF_TYPE_AP || * This works by masking out the bit and shifting it to
type2 == IEEE80211_IF_TYPE_VLAN))); * bit position 1 so the result has the value 0 or 2.
*/
hdrlen += (fc & IEEE80211_STYPE_QOS_DATA)
>> (ilog2(IEEE80211_STYPE_QOS_DATA)-1);
break;
case IEEE80211_FTYPE_CTL:
/*
* ACK and CTS are 10 bytes, all others 16. To see how
* to get this condition consider
* subtype mask: 0b0000000011110000 (0x00F0)
* ACK subtype: 0b0000000011010000 (0x00D0)
* CTS subtype: 0b0000000011000000 (0x00C0)
* bits that matter: ^^^ (0x00E0)
* value of those: 0b0000000011000000 (0x00C0)
*/
if ((fc & 0xE0) == 0xC0)
hdrlen = 10;
else
hdrlen = 16;
break;
}
return hdrlen;
} }
EXPORT_SYMBOL(ieee80211_get_hdrlen);
static int ieee80211_master_open(struct net_device *dev) int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
{ {
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data;
struct ieee80211_sub_if_data *sdata; int hdrlen;
int res = -EOPNOTSUPP;
read_lock(&local->sub_if_lock); if (unlikely(skb->len < 10))
list_for_each_entry(sdata, &local->sub_if_list, list) { return 0;
if (sdata->dev != dev && netif_running(sdata->dev)) { hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
res = 0; if (unlikely(hdrlen > skb->len))
break; return 0;
return hdrlen;
}
EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
int ieee80211_is_eapol(const struct sk_buff *skb)
{
const struct ieee80211_hdr *hdr;
u16 fc;
int hdrlen;
if (unlikely(skb->len < 10))
return 0;
hdr = (const struct ieee80211_hdr *) skb->data;
fc = le16_to_cpu(hdr->frame_control);
if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
return 0;
hdrlen = ieee80211_get_hdrlen(fc);
if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) &&
memcmp(skb->data + hdrlen, eapol_header,
sizeof(eapol_header)) == 0))
return 1;
return 0;
}
void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
if (tx->u.tx.extra_frag) {
struct ieee80211_hdr *fhdr;
int i;
for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
fhdr = (struct ieee80211_hdr *)
tx->u.tx.extra_frag[i]->data;
fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
} }
} }
read_unlock(&local->sub_if_lock);
return res;
} }
static int ieee80211_master_stop(struct net_device *dev) static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
int rate, int erp, int short_preamble)
{ {
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); int dur;
struct ieee80211_sub_if_data *sdata;
read_lock(&local->sub_if_lock); /* calculate duration (in microseconds, rounded up to next higher
list_for_each_entry(sdata, &local->sub_if_list, list) * integer if it includes a fractional microsecond) to send frame of
if (sdata->dev != dev && netif_running(sdata->dev)) * len bytes (does not include FCS) at the given rate. Duration will
dev_close(sdata->dev); * also include SIFS.
read_unlock(&local->sub_if_lock); *
* rate is in 100 kbps, so divident is multiplied by 10 in the
* DIV_ROUND_UP() operations.
*/
return 0; if (local->hw.conf.phymode == MODE_IEEE80211A || erp ||
local->hw.conf.phymode == MODE_ATHEROS_TURBO) {
/*
* OFDM:
*
* N_DBPS = DATARATE x 4
* N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
* (16 = SIGNAL time, 6 = tail bits)
* TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
*
* T_SYM = 4 usec
* 802.11a - 17.5.2: aSIFSTime = 16 usec
* 802.11g - 19.8.4: aSIFSTime = 10 usec +
* signal ext = 6 usec
*/
/* FIX: Atheros Turbo may have different (shorter) duration? */
dur = 16; /* SIFS + signal ext */
dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
4 * rate); /* T_SYM x N_SYM */
} else {
/*
* 802.11b or 802.11g with 802.11b compatibility:
* 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
* Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
*
* 802.11 (DS): 15.3.3, 802.11b: 18.3.4
* aSIFSTime = 10 usec
* aPreambleLength = 144 usec or 72 usec with short preamble
* aPLCPHeaderLength = 48 usec or 24 usec with short preamble
*/
dur = 10; /* aSIFSTime = 10 usec */
dur += short_preamble ? (72 + 24) : (144 + 48);
dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
}
return dur;
} }
static int ieee80211_mgmt_open(struct net_device *dev) /* Exported duration function for driver use */
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
size_t frame_len, int rate)
{ {
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_local *local = hw_to_local(hw);
u16 dur;
int erp;
if (!netif_running(local->mdev)) erp = ieee80211_is_erp_rate(hw->conf.phymode, rate);
return -EOPNOTSUPP; dur = ieee80211_frame_duration(local, frame_len, rate,
return 0; erp, local->short_preamble);
}
static int ieee80211_mgmt_stop(struct net_device *dev) return cpu_to_le16(dur);
{
return 0;
} }
EXPORT_SYMBOL(ieee80211_generic_frame_duration);
/* Check if running monitor interfaces should go to a "soft monitor" mode __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
* and switch them if necessary. */ size_t frame_len,
static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local) const struct ieee80211_tx_control *frame_txctl)
{ {
struct ieee80211_if_init_conf conf; struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_rate *rate;
int short_preamble = local->short_preamble;
int erp;
u16 dur;
if (local->open_count && local->open_count == local->monitors && rate = frame_txctl->rts_rate;
!(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) && erp = !!(rate->flags & IEEE80211_RATE_ERP);
local->ops->remove_interface) {
conf.if_id = -1;
conf.type = IEEE80211_IF_TYPE_MNTR;
conf.mac_addr = NULL;
local->ops->remove_interface(local_to_hw(local), &conf);
}
}
/* Check if running monitor interfaces should go to a "hard monitor" mode /* CTS duration */
* and switch them if necessary. */ dur = ieee80211_frame_duration(local, 10, rate->rate,
static void ieee80211_start_hard_monitor(struct ieee80211_local *local) erp, short_preamble);
{ /* Data frame duration */
struct ieee80211_if_init_conf conf; dur += ieee80211_frame_duration(local, frame_len, rate->rate,
erp, short_preamble);
/* ACK duration */
dur += ieee80211_frame_duration(local, 10, rate->rate,
erp, short_preamble);
if (local->open_count && local->open_count == local->monitors && return cpu_to_le16(dur);
!(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
conf.if_id = -1;
conf.type = IEEE80211_IF_TYPE_MNTR;
conf.mac_addr = NULL;
local->ops->add_interface(local_to_hw(local), &conf);
}
} }
EXPORT_SYMBOL(ieee80211_rts_duration);
static int ieee80211_open(struct net_device *dev) __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
size_t frame_len,
const struct ieee80211_tx_control *frame_txctl)
{ {
struct ieee80211_sub_if_data *sdata, *nsdata; struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_rate *rate;
struct ieee80211_if_init_conf conf; int short_preamble = local->short_preamble;
int res; int erp;
u16 dur;
sdata = IEEE80211_DEV_TO_SUB_IF(dev); rate = frame_txctl->rts_rate;
read_lock(&local->sub_if_lock); erp = !!(rate->flags & IEEE80211_RATE_ERP);
list_for_each_entry(nsdata, &local->sub_if_list, list) {
struct net_device *ndev = nsdata->dev;
if (ndev != dev && ndev != local->mdev && netif_running(ndev) && /* Data frame duration */
compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 && dur = ieee80211_frame_duration(local, frame_len, rate->rate,
!identical_mac_addr_allowed(sdata->type, nsdata->type)) { erp, short_preamble);
read_unlock(&local->sub_if_lock); if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) {
return -ENOTUNIQ; /* ACK duration */
} dur += ieee80211_frame_duration(local, 10, rate->rate,
erp, short_preamble);
} }
read_unlock(&local->sub_if_lock);
if (sdata->type == IEEE80211_IF_TYPE_WDS && return cpu_to_le16(dur);
is_zero_ether_addr(sdata->u.wds.remote_addr)) }
return -ENOLINK; EXPORT_SYMBOL(ieee80211_ctstoself_duration);
if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count && static int __ieee80211_if_config(struct net_device *dev,
!(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { struct sk_buff *beacon,
/* run the interface in a "soft monitor" mode */ struct ieee80211_tx_control *control)
local->monitors++; {
local->open_count++; struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_if_conf conf;
static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
if (!local->ops->config_interface || !netif_running(dev))
return 0; return 0;
}
ieee80211_start_soft_monitor(local);
conf.if_id = dev->ifindex; memset(&conf, 0, sizeof(conf));
conf.type = sdata->type; conf.type = sdata->type;
conf.mac_addr = dev->dev_addr; if (sdata->type == IEEE80211_IF_TYPE_STA ||
res = local->ops->add_interface(local_to_hw(local), &conf); sdata->type == IEEE80211_IF_TYPE_IBSS) {
if (res) { if (local->sta_scanning &&
if (sdata->type == IEEE80211_IF_TYPE_MNTR) local->scan_dev == dev)
ieee80211_start_hard_monitor(local); conf.bssid = scan_bssid;
return res; else
} conf.bssid = sdata->u.sta.bssid;
conf.ssid = sdata->u.sta.ssid;
if (local->open_count == 0) { conf.ssid_len = sdata->u.sta.ssid_len;
res = 0; conf.generic_elem = sdata->u.sta.extra_ie;
tasklet_enable(&local->tx_pending_tasklet); conf.generic_elem_len = sdata->u.sta.extra_ie_len;
tasklet_enable(&local->tasklet); } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
if (local->ops->open) conf.ssid = sdata->u.ap.ssid;
res = local->ops->open(local_to_hw(local)); conf.ssid_len = sdata->u.ap.ssid_len;
if (res == 0) { conf.generic_elem = sdata->u.ap.generic_elem;
res = dev_open(local->mdev); conf.generic_elem_len = sdata->u.ap.generic_elem_len;
if (res) { conf.beacon = beacon;
if (local->ops->stop) conf.beacon_control = control;
local->ops->stop(local_to_hw(local));
} else {
res = ieee80211_hw_config(local);
if (res && local->ops->stop)
local->ops->stop(local_to_hw(local));
else if (!res && local->apdev)
dev_open(local->apdev);
}
}
if (res) {
if (local->ops->remove_interface)
local->ops->remove_interface(local_to_hw(local),
&conf);
return res;
}
} }
local->open_count++; return local->ops->config_interface(local_to_hw(local),
dev->ifindex, &conf);
if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
local->monitors++;
local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
} else
ieee80211_if_config(dev);
if (sdata->type == IEEE80211_IF_TYPE_STA &&
!local->user_space_mlme)
netif_carrier_off(dev);
else
netif_carrier_on(dev);
netif_start_queue(dev);
return 0;
} }
int ieee80211_if_config(struct net_device *dev)
{
return __ieee80211_if_config(dev, NULL, NULL);
}
static int ieee80211_stop(struct net_device *dev) int ieee80211_if_config_beacon(struct net_device *dev)
{ {
struct ieee80211_sub_if_data *sdata;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_tx_control control;
struct sk_buff *skb;
sdata = IEEE80211_DEV_TO_SUB_IF(dev); if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
local->open_count > 1 &&
!(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
/* remove "soft monitor" interface */
local->open_count--;
local->monitors--;
if (!local->monitors)
local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
return 0; return 0;
} skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
if (!skb)
netif_stop_queue(dev); return -ENOMEM;
ieee80211_if_shutdown(dev); return __ieee80211_if_config(dev, skb, &control);
}
if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
local->monitors--;
if (!local->monitors)
local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
}
local->open_count--; int ieee80211_hw_config(struct ieee80211_local *local)
if (local->open_count == 0) { {
if (netif_running(local->mdev)) struct ieee80211_hw_mode *mode;
dev_close(local->mdev); struct ieee80211_channel *chan;
if (local->apdev) int ret = 0;
dev_close(local->apdev);
if (local->ops->stop)
local->ops->stop(local_to_hw(local));
tasklet_disable(&local->tx_pending_tasklet);
tasklet_disable(&local->tasklet);
}
if (local->ops->remove_interface) {
struct ieee80211_if_init_conf conf;
conf.if_id = dev->ifindex; if (local->sta_scanning) {
conf.type = sdata->type; chan = local->scan_channel;
conf.mac_addr = dev->dev_addr; mode = local->scan_hw_mode;
local->ops->remove_interface(local_to_hw(local), &conf); } else {
chan = local->oper_channel;
mode = local->oper_hw_mode;
} }
ieee80211_start_hard_monitor(local); local->hw.conf.channel = chan->chan;
local->hw.conf.channel_val = chan->val;
local->hw.conf.power_level = chan->power_level;
local->hw.conf.freq = chan->freq;
local->hw.conf.phymode = mode->mode;
local->hw.conf.antenna_max = chan->antenna_max;
local->hw.conf.chan = chan;
local->hw.conf.mode = mode;
return 0; #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
} printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
"phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
local->hw.conf.phymode);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
if (local->ops->config)
ret = local->ops->config(local_to_hw(local), &local->hw.conf);
return ret;
}
static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr) struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
struct dev_mc_list *prev,
void **ptr)
{ {
memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ struct ieee80211_local *local = hw_to_local(hw);
return ETH_ALEN; struct ieee80211_sub_if_data *sdata = *ptr;
struct dev_mc_list *mc;
if (!prev) {
WARN_ON(sdata);
sdata = NULL;
}
if (!prev || !prev->next) {
if (sdata)
sdata = list_entry(sdata->list.next,
struct ieee80211_sub_if_data, list);
else
sdata = list_entry(local->sub_if_list.next,
struct ieee80211_sub_if_data, list);
if (&sdata->list != &local->sub_if_list)
mc = sdata->dev->mc_list;
else
mc = NULL;
} else
mc = prev->next;
*ptr = sdata;
return mc;
} }
EXPORT_SYMBOL(ieee80211_get_mc_list_item);
struct ieee80211_rate * struct ieee80211_rate *
ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate) ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate)
...@@ -949,142 +1144,6 @@ ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate) ...@@ -949,142 +1144,6 @@ ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate)
return NULL; return NULL;
} }
static void
ieee80211_fill_frame_info(struct ieee80211_local *local,
struct ieee80211_frame_info *fi,
struct ieee80211_rx_status *status)
{
if (status) {
struct timespec ts;
struct ieee80211_rate *rate;
jiffies_to_timespec(jiffies, &ts);
fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
ts.tv_nsec / 1000);
fi->mactime = cpu_to_be64(status->mactime);
switch (status->phymode) {
case MODE_IEEE80211A:
fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
break;
case MODE_IEEE80211B:
fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
break;
case MODE_IEEE80211G:
fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
break;
case MODE_ATHEROS_TURBO:
fi->phytype =
htonl(ieee80211_phytype_dsss_dot11_turbo);
break;
default:
fi->phytype = htonl(0xAAAAAAAA);
break;
}
fi->channel = htonl(status->channel);
rate = ieee80211_get_rate(local, status->phymode,
status->rate);
if (rate) {
fi->datarate = htonl(rate->rate);
if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
if (status->rate == rate->val)
fi->preamble = htonl(2); /* long */
else if (status->rate == rate->val2)
fi->preamble = htonl(1); /* short */
} else
fi->preamble = htonl(0);
} else {
fi->datarate = htonl(0);
fi->preamble = htonl(0);
}
fi->antenna = htonl(status->antenna);
fi->priority = htonl(0xffffffff); /* no clue */
fi->ssi_type = htonl(ieee80211_ssi_raw);
fi->ssi_signal = htonl(status->ssi);
fi->ssi_noise = 0x00000000;
fi->encoding = 0;
} else {
/* clear everything because we really don't know.
* the msg_type field isn't present on monitor frames
* so we don't know whether it will be present or not,
* but it's ok to not clear it since it'll be assigned
* anyway */
memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
fi->ssi_type = htonl(ieee80211_ssi_none);
}
fi->version = htonl(IEEE80211_FI_VERSION);
fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
}
/* this routine is actually not just for this, but also
* for pushing fake 'management' frames into userspace.
* it shall be replaced by a netlink-based system. */
void
ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
struct ieee80211_rx_status *status, u32 msg_type)
{
struct ieee80211_frame_info *fi;
const size_t hlen = sizeof(struct ieee80211_frame_info);
struct ieee80211_sub_if_data *sdata;
skb->dev = local->apdev;
sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
if (skb_headroom(skb) < hlen) {
I802_DEBUG_INC(local->rx_expand_skb_head);
if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
dev_kfree_skb(skb);
return;
}
}
fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
ieee80211_fill_frame_info(local, fi, status);
fi->msg_type = htonl(msg_type);
sdata->stats.rx_packets++;
sdata->stats.rx_bytes += skb->len;
skb_set_mac_header(skb, 0);
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->pkt_type = PACKET_OTHERHOST;
skb->protocol = htons(ETH_P_802_2);
memset(skb->cb, 0, sizeof(skb->cb));
netif_rx(skb);
}
int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
int radar, int radar_type)
{
struct sk_buff *skb;
struct ieee80211_radar_info *msg;
struct ieee80211_local *local = hw_to_local(hw);
if (!local->apdev)
return 0;
skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
sizeof(struct ieee80211_radar_info));
if (!skb)
return -ENOMEM;
skb_reserve(skb, sizeof(struct ieee80211_frame_info));
msg = (struct ieee80211_radar_info *)
skb_put(skb, sizeof(struct ieee80211_radar_info));
msg->channel = channel;
msg->radar = radar;
msg->radar_type = radar_type;
ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
return 0;
}
EXPORT_SYMBOL(ieee80211_radar_status);
static void ieee80211_stat_refresh(unsigned long data) static void ieee80211_stat_refresh(unsigned long data)
{ {
struct ieee80211_local *local = (struct ieee80211_local *) data; struct ieee80211_local *local = (struct ieee80211_local *) data;
...@@ -1121,7 +1180,6 @@ static void ieee80211_stat_refresh(unsigned long data) ...@@ -1121,7 +1180,6 @@ static void ieee80211_stat_refresh(unsigned long data)
add_timer(&local->stat_timer); add_timer(&local->stat_timer);
} }
void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
struct sk_buff *skb, struct sk_buff *skb,
struct ieee80211_tx_status *status) struct ieee80211_tx_status *status)
...@@ -1198,7 +1256,6 @@ static void ieee80211_tasklet_handler(unsigned long data) ...@@ -1198,7 +1256,6 @@ static void ieee80211_tasklet_handler(unsigned long data)
} }
} }
/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
* make a prepared TX frame (one that has been given to hw) to look like brand * make a prepared TX frame (one that has been given to hw) to look like brand
* new IEEE 802.11 frame that is ready to go through TX processing again. * new IEEE 802.11 frame that is ready to go through TX processing again.
...@@ -1261,7 +1318,6 @@ static void ieee80211_remove_tx_extra(struct ieee80211_local *local, ...@@ -1261,7 +1318,6 @@ static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
} }
} }
void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_tx_status *status) struct ieee80211_tx_status *status)
{ {
...@@ -1480,68 +1536,6 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, ...@@ -1480,68 +1536,6 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
} }
EXPORT_SYMBOL(ieee80211_tx_status); EXPORT_SYMBOL(ieee80211_tx_status);
int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct sta_info *sta;
if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
return 0;
/* Create STA entry for the new peer */
sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
if (!sta)
return -ENOMEM;
sta_info_put(sta);
/* Remove STA entry for the old peer */
sta = sta_info_get(local, sdata->u.wds.remote_addr);
if (sta) {
sta_info_put(sta);
sta_info_free(sta, 0);
} else {
printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
"peer " MAC_FMT "\n",
dev->name, MAC_ARG(sdata->u.wds.remote_addr));
}
/* Update WDS link data */
memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
return 0;
}
/* Must not be called for mdev and apdev */
void ieee80211_if_setup(struct net_device *dev)
{
ether_setup(dev);
dev->hard_start_xmit = ieee80211_subif_start_xmit;
dev->wireless_handlers = &ieee80211_iw_handler_def;
dev->set_multicast_list = ieee80211_set_multicast_list;
dev->change_mtu = ieee80211_change_mtu;
dev->get_stats = ieee80211_get_stats;
dev->open = ieee80211_open;
dev->stop = ieee80211_stop;
dev->uninit = ieee80211_if_reinit;
dev->destructor = ieee80211_if_free;
}
void ieee80211_if_mgmt_setup(struct net_device *dev)
{
ether_setup(dev);
dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
dev->change_mtu = ieee80211_change_mtu_apdev;
dev->get_stats = ieee80211_get_stats;
dev->open = ieee80211_mgmt_open;
dev->stop = ieee80211_mgmt_stop;
dev->type = ARPHRD_IEEE80211_PRISM;
dev->hard_header_parse = header_parse_80211;
dev->uninit = ieee80211_if_reinit;
dev->destructor = ieee80211_if_free;
}
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
const struct ieee80211_ops *ops) const struct ieee80211_ops *ops)
{ {
...@@ -1948,7 +1942,6 @@ static int __init ieee80211_init(void) ...@@ -1948,7 +1942,6 @@ static int __init ieee80211_init(void)
return 0; return 0;
} }
static void __exit ieee80211_exit(void) static void __exit ieee80211_exit(void)
{ {
ieee80211_wme_unregister(); ieee80211_wme_unregister();
......
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