-/*
- * Copyright 2002-2005, Instant802 Networks, Inc.
- * Copyright 2005, Devicescape Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-
-#include <linux/config.h>
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/skbuff.h>
-#include <linux/etherdevice.h>
-#include <linux/if_arp.h>
-#include <linux/wireless.h>
-#include <net/iw_handler.h>
-#include <linux/compiler.h>
-
-#include <net/ieee80211.h>
-#include <net/ieee80211_common.h>
-#include <net/ieee80211_mgmt.h>
-#include "ieee80211_i.h"
-#include "ieee80211_proc.h"
-#include "rate_control.h"
-#include "wep.h"
-#include "wpa.h"
-#include "tkip.h"
-#include "wme.h"
-
-
-/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
-/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
-static unsigned char rfc1042_header[] =
-{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
-/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
-static unsigned char bridge_tunnel_header[] =
-{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
-/* No encapsulation header if EtherType < 0x600 (=length) */
-
-static unsigned char eapol_header[] =
-{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e };
-
-
-struct rate_control_algs {
- struct rate_control_algs *next;
- struct rate_control_ops *ops;
-};
-
-static struct rate_control_algs *ieee80211_rate_ctrl_algs;
-
-static int rate_control_initialize(struct ieee80211_local *local);
-
-
-static u8 * ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len);
-
-
-struct ieee80211_key_conf *
-ieee80211_key_data2conf(struct ieee80211_local *local,
- struct ieee80211_key *data)
-{
- struct ieee80211_key_conf *conf;
-
- conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC);
- if (conf == NULL)
- return NULL;
-
- conf->hw_key_idx = data->hw_key_idx;
- conf->alg = data->alg;
- conf->keylen = data->keylen;
- conf->force_sw_encrypt = data->force_sw_encrypt;
- conf->keyidx = data->keyidx;
- conf->default_tx_key = data->default_tx_key;
- conf->default_wep_only = local->default_wep_only;
- memcpy(conf->key, data->key, data->keylen);
-
- return conf;
-}
-
-
-static int rate_list_match(int *rate_list, int rate)
-{
- int i;
-
- if (rate_list == NULL)
- return 0;
-
- for (i = 0; rate_list[i] >= 0; i++)
- if (rate_list[i] == rate)
- return 1;
-
- return 0;
-}
-
-
-void ieee80211_prepare_rates(struct net_device *dev)
-{
- struct ieee80211_local *local = dev->priv;
- int i;
-
- for (i = 0; i < local->num_curr_rates; i++) {
- struct ieee80211_rate *rate = &local->curr_rates[i];
-
- rate->flags &= ~(IEEE80211_RATE_SUPPORTED |
- IEEE80211_RATE_BASIC);
-
- if (local->supp_rates[local->conf.phymode]) {
- if (!rate_list_match(local->supp_rates
- [local->conf.phymode],
- rate->rate))
- continue;
- }
-
- 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[local->conf.phymode]) {
- if (rate_list_match(local->basic_rates
- [local->conf.phymode],
- rate->rate))
- rate->flags |= IEEE80211_RATE_BASIC;
- } else switch (local->conf.phymode) {
- 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 (local->conf.phymode) {
- 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;
- if (rate->rate != 10 && rate->rate != 20 &&
- rate->rate != 55 && rate->rate != 110)
- rate->flags |= IEEE80211_RATE_ERP;
- break;
- }
- }
-}
-
-
-static void ieee80211_key_threshold_notify(struct net_device *dev,
- struct ieee80211_key *key,
- struct sta_info *sta)
-{
- struct sk_buff *skb;
- struct ieee80211_msg_key_notification *msg;
-
- skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
- sizeof(struct ieee80211_msg_key_notification));
- if (skb == NULL)
- return;
-
- skb_reserve(skb, sizeof(struct ieee80211_frame_info));
- msg = (struct ieee80211_msg_key_notification *)
- skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
- msg->tx_rx_count = key->tx_rx_count;
- memcpy(msg->ifname, dev->name, IFNAMSIZ);
- if (sta)
- memcpy(msg->addr, sta->addr, ETH_ALEN);
- else
- memset(msg->addr, 0xff, ETH_ALEN);
-
- key->tx_rx_count = 0;
-
- ieee80211_rx_mgmt(dev, skb, 0,
- ieee80211_msg_key_threshold_notification);
-}
-
-
-int ieee80211_get_hdrlen(u16 fc)
-{
- int hdrlen = 24;
-
- switch (WLAN_FC_GET_TYPE(fc)) {
- case WLAN_FC_TYPE_DATA:
- if ((fc & WLAN_FC_FROMDS) && (fc & WLAN_FC_TODS))
- hdrlen = 30; /* Addr4 */
- if (WLAN_FC_GET_STYPE(fc) & 0x08)
- hdrlen += 2; /* QoS Control Field */
- break;
- case WLAN_FC_TYPE_CTRL:
- switch (WLAN_FC_GET_STYPE(fc)) {
- case WLAN_FC_STYPE_CTS:
- case WLAN_FC_STYPE_ACK:
- hdrlen = 10;
- break;
- default:
- hdrlen = 16;
- break;
- }
- break;
- }
-
- return hdrlen;
-}
-
-
-int ieee80211_get_hdrlen_from_skb(struct sk_buff *skb)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- int hdrlen;
-
- if (unlikely(skb->len < 10))
- return 0;
- hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
- if (unlikely(hdrlen > skb->len))
- return 0;
- return hdrlen;
-}
-
-
-#ifdef IEEE80211_VERBOSE_DEBUG_FRAME_DUMP
-static void ieee80211_dump_frame(const char *ifname, const char *title,
- struct sk_buff *skb)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc;
- int hdrlen;
-
- printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len);
- if (skb->len < 4) {
- printk("\n");
- return;
- }
-
- fc = le16_to_cpu(hdr->frame_control);
- hdrlen = ieee80211_get_hdrlen(fc);
- if (hdrlen > skb->len)
- hdrlen = skb->len;
- if (hdrlen >= 4)
- printk(" FC=0x%04x DUR=0x%04x",
- fc, le16_to_cpu(hdr->duration_id));
- if (hdrlen >= 10)
- printk(" A1=" MACSTR, MAC2STR(hdr->addr1));
- if (hdrlen >= 16)
- printk(" A2=" MACSTR, MAC2STR(hdr->addr2));
- if (hdrlen >= 24)
- printk(" A3=" MACSTR, MAC2STR(hdr->addr3));
- if (hdrlen >= 30)
- printk(" A4=" MACSTR, MAC2STR(hdr->addr4));
- printk("\n");
-}
-#else /* IEEE80211_VERBOSE_DEBUG_FRAME_DUMP */
-static inline void ieee80211_dump_frame(const char *ifname, const char *title,
- struct sk_buff *skb)
-{
-}
-#endif /* IEEE80211_VERBOSE_DEBUG_FRAME_DUMP */
-
-
-static int ieee80211_is_eapol(struct sk_buff *skb)
-{
- struct ieee80211_hdr *hdr;
- u16 fc;
- int hdrlen;
-
- if (unlikely(skb->len < 10))
- return 0;
-
- hdr = (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;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx)
-{
- struct rate_control_extra extra;
-
- memset(&extra, 0, sizeof(extra));
- extra.mgmt_data = tx->sdata &&
- tx->sdata->type == IEEE80211_SUB_IF_TYPE_MGMT;
- extra.ethertype = tx->ethertype;
- extra.startidx = 0;
- extra.endidx = tx->local->num_curr_rates;
-
-
- tx->u.tx.rate = rate_control_get_rate(tx->dev, tx->skb, &extra);
- if (unlikely(extra.probe != NULL)) {
- tx->u.tx.control->rate_ctrl_probe = 1;
- tx->u.tx.probe_last_frag = 1;
-// tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val;
- tx->u.tx.rate = extra.probe;
- } else {
-// tx->u.tx.control->alt_retry_rate = -1;
- }
- if (!tx->u.tx.rate)
- return TXRX_DROP;
- if (tx->local->conf.phymode == MODE_IEEE80211G &&
- tx->local->cts_protect_erp_frames && tx->fragmented &&
- extra.nonerp) {
- tx->u.tx.last_frag_rate = tx->u.tx.rate;
- tx->u.tx.last_frag_rateidx = extra.rateidx;
- tx->u.tx.probe_last_frag = extra.probe ? 1 : 0;
-
- tx->u.tx.rate = extra.nonerp;
-// tx->u.tx.control->rateidx = extra.nonerp_idx;
- tx->u.tx.control->rate_ctrl_probe = 0;
- } else {
- tx->u.tx.last_frag_rate = tx->u.tx.rate;
- tx->u.tx.last_frag_rateidx = extra.rateidx;
-// tx->u.tx.control->rateidx = extra.rateidx;
- }
- tx->u.tx.control->tx_rate = tx->u.tx.rate->val;
- if ((tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) &&
- tx->local->short_preamble &&
- (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) {
- tx->u.tx.short_preamble = 1;
- tx->u.tx.control->tx_rate = tx->u.tx.rate->val2;
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx)
-{
- if (tx->sta)
- tx->u.tx.control->key_idx = tx->sta->key_idx_compression;
- else
- tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID;
-
- if (unlikely(tx->u.tx.control->do_not_encrypt))
- tx->key = NULL;
- else if (tx->sta && tx->sta->key)
- tx->key = tx->sta->key;
- else if (tx->sdata->default_key)
- tx->key = tx->sdata->default_key;
- else if (tx->sdata->drop_unencrypted && !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) {
- I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
- return TXRX_DROP;
- } else
- tx->key = NULL;
-
- if (tx->key) {
- tx->key->tx_rx_count++;
- if (unlikely(tx->local->key_tx_rx_threshold &&
- tx->key->tx_rx_count >
- tx->local->key_tx_rx_threshold)) {
- ieee80211_key_threshold_notify(tx->dev, tx->key,
- tx->sta);
- }
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
- size_t hdrlen, per_fragm, num_fragm, payload_len, left;
- struct sk_buff **frags, *first, *frag;
- int i;
- u8 *pos;
- int frag_threshold = tx->local->fragmentation_threshold;
-
- if (!tx->fragmented)
- return TXRX_CONTINUE;
-
-
- first = tx->skb;
-
- hdrlen = ieee80211_get_hdrlen(tx->fc);
- payload_len = first->len - hdrlen;
- per_fragm = frag_threshold - hdrlen - 4 /* FCS */;
- num_fragm = (payload_len + per_fragm - 1) / per_fragm;
-
- frags = (struct sk_buff **)
- kmalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC);
- if (frags == NULL)
- goto fail;
- memset(frags, 0, num_fragm * sizeof(struct sk_buff *));
-
- hdr->frame_control |= cpu_to_le16(WLAN_FC_MOREFRAG);
- pos = first->data + hdrlen + per_fragm;
- left = payload_len - per_fragm;
- for (i = 0; i < num_fragm - 1; i++) {
- struct ieee80211_hdr *fhdr;
- size_t copylen;
-
- if (left <= 0)
- goto fail;
-
- /* reserve enough extra head and tail room for possible
- * encryption */
-#define IEEE80211_ENCRYPT_HEADROOM 8
-#define IEEE80211_ENCRYPT_TAILROOM 12
- frag = frags[i] =
- dev_alloc_skb(frag_threshold +
- IEEE80211_ENCRYPT_HEADROOM +
- IEEE80211_ENCRYPT_TAILROOM);
- if (!frag)
- goto fail;
- /* Make sure that all fragments use the same priority so
- * that they end up using the same TX queue */
- frag->priority = first->priority;
- skb_reserve(frag, IEEE80211_ENCRYPT_HEADROOM);
- fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen);
- memcpy(fhdr, first->data, hdrlen);
- if (i == num_fragm - 2)
- fhdr->frame_control &= cpu_to_le16(~WLAN_FC_MOREFRAG);
- fhdr->seq_ctrl = cpu_to_le16(i + 1);
- copylen = left > per_fragm ? per_fragm : left;
- memcpy(skb_put(frag, copylen), pos, copylen);
-
- pos += copylen;
- left -= copylen;
- }
- skb_trim(first, hdrlen + per_fragm);
-
- tx->u.tx.num_extra_frag = num_fragm - 1;
- tx->u.tx.extra_frag = frags;
-
- return TXRX_CONTINUE;
-
- fail:
- printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name);
- if (frags) {
- for (i = 0; i < num_fragm - 1; i++)
- if (frags[i])
- dev_kfree_skb(frags[i]);
- kfree(frags);
- }
- I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment);
- return TXRX_DROP;
-}
-
-
-static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb)
-{
- if (tx->key->force_sw_encrypt || tx->local->conf.sw_encrypt) {
- if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
- return -1;
- } else {
- tx->u.tx.control->key_idx = tx->key->hw_key_idx;
- if (tx->local->hw->wep_include_iv) {
- if (ieee80211_wep_add_iv(tx->local, skb, tx->key) ==
- NULL)
- 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(WLAN_FC_ISWEP);
- 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(WLAN_FC_ISWEP);
- }
- }
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
- u16 fc;
-
- fc = le16_to_cpu(hdr->frame_control);
-
- if (!tx->key || tx->key->alg != ALG_WEP ||
- (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_DATA &&
- (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_MGMT ||
- WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_AUTH)))
- return TXRX_CONTINUE;
-
- tx->u.tx.control->iv_len = WEP_IV_LEN;
- tx->u.tx.control->icv_len = WEP_ICV_LEN;
- ieee80211_tx_set_iswep(tx);
-
- if (wep_encrypt_skb(tx, tx->skb) < 0) {
- I802_DEBUG_INC(tx->local->tx_handlers_drop_wep);
- return TXRX_DROP;
- }
-
- if (tx->u.tx.extra_frag) {
- int i;
- for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
- if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) {
- I802_DEBUG_INC(tx->local->
- tx_handlers_drop_wep);
- return TXRX_DROP;
- }
- }
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static inline int ceiling_div(int dividend, int divisor)
-{
- return ((dividend + divisor - 1) / divisor);
-}
-
-
-static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
- int rate, int erp, int short_preamble)
-{
- int dur;
-
- /* 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
- * ceiling_div() operations.
- */
-
- if (local->conf.phymode == MODE_IEEE80211A || erp ||
- local->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 * ceiling_div((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 ms or 24 ms with short preamble
- */
- dur = 10; /* aSIFSTime = 10 usec */
- dur += short_preamble ? (72 + 24) : (144 + 48);
-
- dur += ceiling_div(8 * (len + 4) * 10, rate);
- }
-
- return dur;
-}
-
-
-static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr,
- int next_frag_len)
-{
- int rate, mrate, erp, dur, i;
- struct ieee80211_rate *txrate = tx->u.tx.rate;
- struct ieee80211_local *local = tx->local;
-
- erp = txrate->flags & IEEE80211_RATE_ERP;
-
- /*
- * data and mgmt (except PS Poll):
- * - during CFP: 32768
- * - during contention period:
- * if addr1 is group address: 0
- * if more fragments = 0 and addr1 is individual address: time to
- * transmit one ACK plus SIFS
- * if more fragments = 1 and addr1 is individual address: time to
- * transmit next fragment plus 2 x ACK plus 3 x SIFS
- *
- * IEEE 802.11, 9.6:
- * - control response frame (CTS or ACK) shall be transmitted using the
- * same rate as the immediately previous frame in the frame exchange
- * sequence, if this rate belongs to the PHY mandatory rates, or else
- * at the highest possible rate belonging to the PHY rates in the
- * BSSBasicRateSet
- */
-
- if (WLAN_FC_GET_TYPE(tx->fc) == WLAN_FC_TYPE_CTRL) {
- /* TODO: These control frames are not currently sent by
- * 80211.o, but should they be implemented, this function
- * needs to be updated to support duration field calculation.
- *
- * RTS: time needed to transmit pending data/mgmt frame plus
- * one CTS frame plus one ACK frame plus 3 x SIFS
- * CTS: duration of immediately previous RTS minus time
- * required to transmit CTS and its SIFS
- * ACK: 0 if immediately previous directed data/mgmt had
- * more=0, with more=1 duration in ACK frame is duration
- * from previous frame minus time needed to transmit ACK
- * and its SIFS
- * PS Poll: BIT(15) | BIT(14) | aid
- */
- return 0;
- }
-
- /* data/mgmt */
- if (0 /* FIX: data/mgmt during CFP */)
- return 32768;
-
- if (group_addr) /* Group address as the destination - no ACK */
- return 0;
-
- /* Individual destination address:
- * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
- * CTS and ACK frames shall be transmitted using the highest rate in
- * basic rate set that is less than or equal to the rate of the
- * immediately previous frame and that is using the same modulation
- * (CCK or OFDM). If no basic rate set matches with these requirements,
- * the highest mandatory rate of the PHY that is less than or equal to
- * the rate of the previous frame is used.
- * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
- */
- rate = -1;
- mrate = 10; /* use 1 Mbps if everything fails */
- for (i = 0; i < local->num_curr_rates; i++) {
- struct ieee80211_rate *r = &local->curr_rates[i];
- if (r->rate > txrate->rate)
- break;
-
- if (IEEE80211_RATE_MODULATION(txrate->flags) !=
- IEEE80211_RATE_MODULATION(r->flags))
- continue;
-
- if (r->flags & IEEE80211_RATE_BASIC)
- rate = r->rate;
- else if (r->flags & IEEE80211_RATE_MANDATORY)
- mrate = r->rate;
- }
- if (rate == -1) {
- /* No matching basic rate found; use highest suitable mandatory
- * PHY rate */
- rate = mrate;
- }
-
- /* Time needed to transmit ACK
- * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
- * to closest integer */
-
- dur = ieee80211_frame_duration(local, 10, rate, erp,
- local->short_preamble);
-
- if (next_frag_len) {
- /* Frame is fragmented: duration increases with time needed to
- * transmit next fragment plus ACK and 2 x SIFS. */
- dur *= 2; /* ACK + SIFS */
- /* next fragment */
- dur += ieee80211_frame_duration(local, next_frag_len,
- txrate->rate, erp,
- local->short_preamble);
- }
-
- return dur;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
- u16 dur;
- struct ieee80211_tx_control *control = tx->u.tx.control;
-
- if (!MULTICAST_ADDR(hdr->addr1)) {
- if (tx->skb->len >= tx->local->rts_threshold &&
- tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) {
- control->use_rts_cts = 1;
- control->retry_limit =
- tx->local->long_retry_limit;
- } else {
- control->retry_limit =
- tx->local->short_retry_limit;
- }
- } else {
- control->retry_limit = 1;
- }
-
- if (tx->fragmented) {
- /* Do not use multiple retry rates when sending fragmented
- * frames.
- * TODO: The last fragment could still use multiple retry
- * rates. */
-// control->alt_retry_rate = -1;
- }
-
- /* Use CTS protection for unicast frames sent using extended rates if
- * there are associated non-ERP stations and RTS/CTS is not configured
- * for the frame. */
- if (tx->local->conf.phymode == MODE_IEEE80211G &&
- (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) &&
- tx->u.tx.unicast &&
- tx->local->cts_protect_erp_frames &&
- !control->use_rts_cts)
- control->use_cts_protect = 1;
-
-
- /* Setup duration field for the first fragment of the frame. Duration
- * for remaining fragments will be updated when they are being sent
- * to low-level driver in ieee80211_tx(). */
- dur = ieee80211_duration(tx, MULTICAST_ADDR(hdr->addr1),
- tx->fragmented ? tx->u.tx.extra_frag[0]->len :
- 0);
- hdr->duration_id = cpu_to_le16(dur);
-
- if (control->use_rts_cts || control->use_cts_protect) {
- struct ieee80211_rate *rate;
- int erp = tx->u.tx.rate->flags & IEEE80211_RATE_ERP;
-
- /* Do not use multiple retry rates when using RTS/CTS */
-// control->alt_retry_rate = -1;
-
- /* Use min(data rate, max base rate) as CTS/RTS rate */
- rate = tx->u.tx.rate;
- while (rate > tx->local->curr_rates &&
- !(rate->flags & IEEE80211_RATE_BASIC))
- rate--;
-
-
- if (control->use_rts_cts)
- dur += ieee80211_frame_duration(tx->local, 10,
- rate->rate, erp,
- tx->local->
- short_preamble);
- dur += ieee80211_frame_duration(tx->local, tx->skb->len,
- tx->u.tx.rate->rate, erp,
- tx->u.tx.short_preamble);
- control->rts_cts_duration = dur;
- control->rts_cts_rate = rate->val;
- }
-
- if (tx->sta) {
- tx->sta->tx_packets++;
- tx->sta->tx_fragments++;
- tx->sta->tx_bytes += tx->skb->len;
- if (tx->u.tx.extra_frag) {
- int i;
- tx->sta->tx_fragments += tx->u.tx.num_extra_frag;
- for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
- tx->sta->tx_bytes +=
- tx->u.tx.extra_frag[i]->len;
- }
- }
- }
- tx->local->scan.txrx_count++;
-
- return TXRX_CONTINUE;
-}
-
-
-static void ieee80211_rate_limit(unsigned long data)
-{
- struct ieee80211_local *local = (struct ieee80211_local *) data;
-
- if (local->rate_limit) {
- local->rate_limit_bucket += local->rate_limit;
- if (local->rate_limit_bucket > local->rate_limit_burst)
- local->rate_limit_bucket = local->rate_limit_burst;
- local->rate_limit_timer.expires = jiffies + HZ;
- add_timer(&local->rate_limit_timer);
- }
-
-}
-
-static ieee80211_txrx_result
-ieee80211_tx_h_rate_limit(struct ieee80211_txrx_data *tx)
-{
-
- if (likely(!tx->local->rate_limit || tx->u.tx.unicast))
- return TXRX_CONTINUE;
-
- /* rate limit */
- if (tx->local->rate_limit_bucket) {
- tx->local->rate_limit_bucket--;
- return TXRX_CONTINUE;
- }
-
- I802_DEBUG_INC(tx->local->tx_handlers_drop_rate_limit);
- return TXRX_DROP;
-}
-
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx)
-{
-#ifdef CONFIG_IEEE80211_VERBOSE_DEBUG
- struct sk_buff *skb = tx->skb;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
-#endif /* CONFIG_IEEE80211_VERBOSE_DEBUG */
- u32 sta_flags;
-
- if (unlikely(tx->local->sta_scanning != 0) &&
- (WLAN_FC_GET_TYPE(tx->fc) != WLAN_FC_TYPE_MGMT ||
- WLAN_FC_GET_STYPE(tx->fc) != WLAN_FC_STYPE_PROBE_REQ))
- return TXRX_DROP;
-
- if (tx->u.tx.ps_buffered)
- return TXRX_CONTINUE;
-
- sta_flags = tx->sta ? tx->sta->flags : 0;
-
- if (likely(tx->u.tx.unicast)) {
- if (unlikely(!(sta_flags & WLAN_STA_ASSOC) &&
- tx->local->conf.mode != IW_MODE_ADHOC &&
- WLAN_FC_GET_TYPE(tx->fc) == WLAN_FC_TYPE_DATA)) {
-#ifdef CONFIG_IEEE80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: dropped data frame to not "
- "associated station " MACSTR "\n",
- tx->dev->name, MAC2STR(hdr->addr1));
-#endif /* CONFIG_IEEE80211_VERBOSE_DEBUG */
- I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
- return TXRX_DROP;
- }
- } else {
- if (unlikely(WLAN_FC_GET_TYPE(tx->fc) == WLAN_FC_TYPE_DATA &&
- tx->local->num_sta == 0 &&
- !tx->local->allow_broadcast_always &&
- tx->local->conf.mode != IW_MODE_ADHOC)) {
- /*
- * No associated STAs - no need to send multicast
- * frames.
- */
- return TXRX_DROP;
- }
- return TXRX_CONTINUE;
- }
-
- if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x &&
- !(sta_flags & WLAN_STA_AUTHORIZED))) {
-#ifdef CONFIG_IEEE80211_DEBUG
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) tx->skb->data;
- printk(KERN_DEBUG "%s: dropped frame to " MACSTR
- " (unauthorized port)\n", tx->dev->name,
- MAC2STR(hdr->addr1));
-#endif
- I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port);
- return TXRX_DROP;
- }
-
- 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
- * happen often during normal operation, so dropping the oldest buffered packet
- * from each queue should be OK to make some room for new frames. */
-static void purge_old_ps_buffers(struct ieee80211_local *local)
-{
- int total = 0, purged = 0;
- struct sk_buff *skb;
- struct list_head *ptr;
-
- spin_lock_bh(&local->sub_if_lock);
- list_for_each(ptr, &local->sub_if_list) {
- struct ieee80211_if_norm *norm;
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
- if (sdata->dev == local->mdev ||
- sdata->type != IEEE80211_SUB_IF_TYPE_NORM)
- continue;
- norm = &sdata->u.norm;
- skb = skb_dequeue(&norm->ps_bc_buf);
- if (skb) {
- purged++;
- dev_kfree_skb(skb);
- }
- total += skb_queue_len(&norm->ps_bc_buf);
- }
- spin_unlock_bh(&local->sub_if_lock);
-
- spin_lock_bh(&local->sta_lock);
- list_for_each(ptr, &local->sta_list) {
- struct sta_info *sta =
- list_entry(ptr, struct sta_info, list);
- skb = skb_dequeue(&sta->ps_tx_buf);
- if (skb) {
- purged++;
- dev_kfree_skb(skb);
- }
- total += skb_queue_len(&sta->ps_tx_buf);
- }
- spin_unlock_bh(&local->sta_lock);
-
- local->total_ps_buffered = total;
- printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n",
- local->mdev->name, purged);
-}
-
-
-static inline ieee80211_txrx_result
-ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx)
-{
- /* broadcast/multicast frame */
- /* If any of the associated stations is in power save mode,
- * the frame is buffered to be sent after DTIM beacon frame */
- if (tx->local->hw->host_broadcast_ps_buffering &&
- tx->sdata->type != IEEE80211_SUB_IF_TYPE_WDS &&
- tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) &&
- !(tx->fc & WLAN_FC_ORDER)) {
- if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
- purge_old_ps_buffers(tx->local);
- if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >=
- AP_MAX_BC_BUFFER) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: BC TX buffer full - "
- "dropping the oldest frame\n",
- tx->dev->name);
- }
- dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf));
- } else
- tx->local->total_ps_buffered++;
- skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb);
- return TXRX_QUEUED;
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static inline ieee80211_txrx_result
-ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx)
-{
- struct sta_info *sta = tx->sta;
-
- if (unlikely(!sta ||
- (WLAN_FC_GET_TYPE(tx->fc) == WLAN_FC_TYPE_MGMT &&
- WLAN_FC_GET_STYPE(tx->fc) == WLAN_FC_STYPE_PROBE_RESP)))
- return TXRX_CONTINUE;
-
- if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) {
- struct ieee80211_tx_packet_data *pkt_data;
-#ifdef IEEE80211_VERBOSE_DEBUG_PS
- printk(KERN_DEBUG "STA " MACSTR " aid %d: PS buffer (entries "
- "before %d)\n",
- MAC2STR(sta->addr), sta->aid,
- skb_queue_len(&sta->ps_tx_buf));
-#endif /* IEEE80211_VERBOSE_DEBUG_PS */
- sta->flags |= WLAN_STA_TIM;
- if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
- purge_old_ps_buffers(tx->local);
- if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) {
- struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf);
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: STA " MACSTR " TX "
- "buffer full - dropping oldest frame\n",
- tx->dev->name, MAC2STR(sta->addr));
- }
- dev_kfree_skb(old);
- } else
- tx->local->total_ps_buffered++;
- /* Queue frame to be sent after STA sends an PS Poll frame */
- if (skb_queue_empty(&sta->ps_tx_buf) && tx->local->hw->set_tim)
- tx->local->hw->set_tim(tx->dev, sta->aid, 1);
- pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb;
- pkt_data->jiffies = jiffies;
- skb_queue_tail(&sta->ps_tx_buf, tx->skb);
- return TXRX_QUEUED;
- }
-#ifdef IEEE80211_VERBOSE_DEBUG_PS
- else if (unlikely(sta->flags & WLAN_STA_PS)) {
- printk(KERN_DEBUG "%s: STA " MACSTR " in PS mode, but pspoll "
- "set -> send frame\n", tx->dev->name,
- MAC2STR(sta->addr));
- }
-#endif /* IEEE80211_VERBOSE_DEBUG_PS */
- sta->pspoll = 0;
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx)
-{
- if (unlikely(tx->u.tx.ps_buffered))
- return TXRX_CONTINUE;
-
- if (tx->u.tx.unicast)
- return ieee80211_tx_h_unicast_ps_buf(tx);
- else
- return ieee80211_tx_h_multicast_ps_buf(tx);
-}
-
-
-static void inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx,
- struct sk_buff *skb,
- struct net_device *dev,
- struct ieee80211_tx_control *control)
-{
- struct ieee80211_local *local = dev->priv;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct ieee80211_tx_packet_data *pkt_data;
- int hdrlen;
-
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
-
- memset(tx, 0, sizeof(*tx));
- tx->skb = skb;
- tx->dev = pkt_data->sdata->dev; /* use original interface */
- tx->local = local;
- tx->sdata = pkt_data->sdata;
- tx->sta = sta_info_get(local, hdr->addr1);
- tx->fc = le16_to_cpu(hdr->frame_control);
- control->power_level = local->conf.power_level;
- tx->u.tx.control = control;
- tx->u.tx.unicast = !MULTICAST_ADDR(hdr->addr1);
- control->no_ack = MULTICAST_ADDR(hdr->addr1);
- tx->fragmented = local->fragmentation_threshold <
- IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast &&
- skb->len + 4 /* FCS */ > local->fragmentation_threshold &&
- (local->hw->set_frag_threshold == NULL);
- if (tx->sta == NULL)
- control->clear_dst_mask = 1;
- else if (tx->sta->clear_dst_mask) {
- control->clear_dst_mask = 1;
- tx->sta->clear_dst_mask = 0;
- }
- control->antenna_sel = local->conf.antenna_sel;
- if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta)
- control->antenna_sel = tx->sta->antenna_sel;
- hdrlen = ieee80211_get_hdrlen(tx->fc);
- if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) {
- u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)];
- tx->ethertype = (pos[0] << 8) | pos[1];
- }
-
-}
-
-
-static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb,
- struct ieee80211_tx_control *control, int mgmt)
-{
- struct ieee80211_local *local = dev->priv;
- struct sta_info *sta;
- ieee80211_tx_handler *handler;
- struct ieee80211_txrx_data tx;
- ieee80211_txrx_result res = TXRX_DROP;
- int ret, i;
-
- if (unlikely(skb->len < 10)) {
- dev_kfree_skb(skb);
- return 0;
- }
-
- ieee80211_tx_prepare(&tx, skb, dev, control);
- sta = tx.sta;
- tx.u.tx.mgmt_interface = mgmt;
-
- for (handler = local->tx_handlers; *handler != NULL; handler++) {
- res = (*handler)(&tx);
- if (res != TXRX_CONTINUE)
- break;
- }
-
- skb = tx.skb; /* handlers are allowed to change skb */
-
- if (sta)
- sta_info_release(local, sta);
-
- if (unlikely(res == TXRX_DROP)) {
- I802_DEBUG_INC(local->tx_handlers_drop);
- goto drop;
- }
-
- if (unlikely(res == TXRX_QUEUED)) {
- I802_DEBUG_INC(local->tx_handlers_queued);
- return 0;
- }
-
- ieee80211_dump_frame(dev->name, "TX to low-level driver", skb);
- ret = local->hw->tx(dev, skb, control);
-#ifdef IEEE80211_LEDS
- if (!ret && local->tx_led_counter++ == 0) {
- ieee80211_tx_led(1, dev);
- }
-#endif /* IEEE80211_LEDS */
- if (tx.u.tx.extra_frag) {
- if (ret > 0) {
- /* Must free all fragments and return 0 since skb data
- * has been fragmented into multiple buffers.
- * TODO: could free extra fragments and restore skb to
- * the original form since the data is still there and
- * then return nonzero so that Linux netif would
- * retry. */
- goto drop;
- }
-
- skb = NULL; /* skb is now owned by low-level driver */
- control->use_rts_cts = 0;
- control->use_cts_protect = 0;
- control->clear_dst_mask = 0;
- for (i = 0; i < tx.u.tx.num_extra_frag; i++) {
- int next_len, dur;
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *)
- tx.u.tx.extra_frag[i]->data;
- if (i + 1 < tx.u.tx.num_extra_frag)
- next_len = tx.u.tx.extra_frag[i + 1]->len;
- else {
- next_len = 0;
- tx.u.tx.rate = tx.u.tx.last_frag_rate;
- tx.u.tx.control->tx_rate = tx.u.tx.rate->val;
-// tx.u.tx.control->rateidx =
-// tx.u.tx.last_frag_rateidx;
- tx.u.tx.control->rate_ctrl_probe =
- tx.u.tx.probe_last_frag;
- }
- dur = ieee80211_duration(&tx, 0, next_len);
- hdr->duration_id = cpu_to_le16(dur);
-
- ieee80211_dump_frame(dev->name,
- "TX to low-level driver", skb);
- ret = local->hw->tx(dev, tx.u.tx.extra_frag[i],
- control);
- if (ret > 0)
- goto drop;
-#ifdef IEEE80211_LEDS
- if (local->tx_led_counter++ == 0) {
- ieee80211_tx_led(1, dev);
- }
-#endif /* IEEE80211_LEDS */
- tx.u.tx.extra_frag[i] = NULL;
- }
- kfree(tx.u.tx.extra_frag);
- }
- if (ret == -1)
- ret = 0;
- return ret;
-
- drop:
- if (skb)
- dev_kfree_skb(skb);
- for (i = 0; i < tx.u.tx.num_extra_frag; i++)
- if (tx.u.tx.extra_frag[i])
- dev_kfree_skb(tx.u.tx.extra_frag[i]);
- kfree(tx.u.tx.extra_frag);
- return 0;
-}
-
-
-static int ieee80211_master_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct ieee80211_tx_control control;
- struct ieee80211_tx_packet_data *pkt_data;
- struct ieee80211_sub_if_data *sdata;
- int ret = 1;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- /*
- * copy control out of the skb so other people can use skb->cb
- */
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
- if (unlikely(pkt_data->magic != IEEE80211_CB_MAGIC)) {
- printk(KERN_WARNING "%s: Someone messed with our skb->cb\n",
- dev->name);
- dev_kfree_skb(skb);
- return 0;
- }
- memcpy(&control, &pkt_data->control,
- sizeof(struct ieee80211_tx_control));
-
- ret = ieee80211_tx(dev, skb, &control,
- pkt_data->sdata->type ==
- IEEE80211_SUB_IF_TYPE_MGMT);
-
- return ret;
-}
-
-
-/**
- * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
- * subinterfaces (wlan#, WDS, and VLAN interfaces)
- * @skb: packet to be sent
- * @dev: incoming interface
- *
- * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
- * not be freed, and caller is responsible for either retrying later or freeing
- * skb).
- *
- * This function takes in an Ethernet header and encapsulates it with suitable
- * IEEE 802.11 header based on which interface the packet is coming in. The
- * encapsulated packet will then be passed to master interface, wlan#.11, for
- * transmission (through low-level driver).
- */
-static int ieee80211_subif_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct ieee80211_local *local = (struct ieee80211_local *) dev->priv;
- struct ieee80211_tx_packet_data *pkt_data;
- struct ieee80211_sub_if_data *sdata;
- int ret = 1, head_need;
- u16 ethertype, hdrlen, fc;
- struct ieee80211_hdr hdr;
- u8 *encaps_data;
- int encaps_len, skip_header_bytes;
- int nh_pos, h_pos, no_encrypt = 0;
- struct sta_info *sta;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (unlikely(skb->len < ETH_HLEN)) {
- printk(KERN_DEBUG "%s: short skb (len=%d)\n",
- dev->name, skb->len);
- ret = 0;
- goto fail;
- }
-
- nh_pos = skb->nh.raw - skb->data;
- h_pos = skb->h.raw - skb->data;
-
- /* convert Ethernet header to proper 802.11 header (based on
- * operation mode) */
- ethertype = (skb->data[12] << 8) | skb->data[13];
- /* TODO: handling for 802.1x authorized/unauthorized port */
- fc = (WLAN_FC_TYPE_DATA << 2) | (WLAN_FC_STYPE_DATA << 4);
-
- if (likely(sdata->type == IEEE80211_SUB_IF_TYPE_NORM ||
- sdata->type == IEEE80211_SUB_IF_TYPE_VLAN)) {
- if (local->conf.mode == IW_MODE_MASTER) {
- fc |= WLAN_FC_FROMDS;
- /* DA BSSID SA */
- memcpy(hdr.addr1, skb->data, ETH_ALEN);
- memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
- memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
- } else if (local->conf.mode == IW_MODE_INFRA) {
- fc |= WLAN_FC_TODS;
- /* BSSID SA DA */
- memcpy(hdr.addr1, local->bssid, ETH_ALEN);
- memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
- memcpy(hdr.addr3, skb->data, ETH_ALEN);
- } else if (local->conf.mode == IW_MODE_ADHOC) {
- /* DA SA BSSID */
- memcpy(hdr.addr1, skb->data, ETH_ALEN);
- memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
- memcpy(hdr.addr3, local->bssid, ETH_ALEN);
- }
- hdrlen = 24;
- } else if (sdata->type == IEEE80211_SUB_IF_TYPE_WDS) {
- fc |= WLAN_FC_FROMDS | WLAN_FC_TODS;
- /* RA TA DA SA */
- memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
- memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
- memcpy(hdr.addr3, skb->data, ETH_ALEN);
- memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
- hdrlen = 30;
- } else if (sdata->type == IEEE80211_SUB_IF_TYPE_STA) {
- if (local->conf.mode == IW_MODE_INFRA) {
- fc |= WLAN_FC_TODS;
- /* BSSID SA DA */
- memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN);
- memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
- memcpy(hdr.addr3, skb->data, ETH_ALEN);
- } else {
- /* DA SA BSSID */
- memcpy(hdr.addr1, skb->data, ETH_ALEN);
- memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
- memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN);
- }
- hdrlen = 24;
- } else {
- ret = 0;
- goto fail;
- }
-
- /* receiver is QoS enabled, use a QoS type frame */
- sta = sta_info_get(local, hdr.addr1);
- if (sta) {
- if (sta->flags & WLAN_STA_WME) {
- fc |= WLAN_FC_STYPE_QOS_DATA << 4;
- hdrlen += 2;
- }
- sta_info_release(local, sta);
- }
-
- hdr.frame_control = cpu_to_le16(fc);
- hdr.duration_id = 0;
- hdr.seq_ctrl = 0;
-
- skip_header_bytes = ETH_HLEN;
- if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
- encaps_data = bridge_tunnel_header;
- encaps_len = sizeof(bridge_tunnel_header);
- skip_header_bytes -= 2;
- } else if (ethertype >= 0x600) {
- encaps_data = rfc1042_header;
- encaps_len = sizeof(rfc1042_header);
- skip_header_bytes -= 2;
- } else {
- encaps_data = NULL;
- encaps_len = 0;
- }
-
- skb_pull(skb, skip_header_bytes);
- nh_pos -= skip_header_bytes;
- h_pos -= skip_header_bytes;
-
- /* TODO: implement support for fragments so that there is no need to
- * reallocate and copy payload; it might be enough to support one
- * extra fragment that would be copied in the beginning of the frame
- * data.. anyway, it would be nice to include this into skb structure
- * somehow
- *
- * There are few options for this:
- * use skb->cb as an extra space for 802.11 header
- * allocate new buffer if not enough headroom
- * make sure that there is enough headroom in every skb by increasing
- * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and
- * alloc_skb() (net/core/skbuff.c)
- */
- head_need = hdrlen + encaps_len + (local->hw->extra_hdr_room ? 2 : 0);
- head_need -= skb_headroom(skb);
-
- /* We are going to modify skb data, so make a copy of it if happens to
- * be cloned. This could happen, e.g., with Linux bridge code passing
- * us broadcast frames. */
-
- if (head_need > 0 || skb_cloned(skb)) {
-#if 0
- printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes "
- "of headroom\n", dev->name, head_need);
-#endif
-
- if (skb_cloned(skb))
- I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
- else
- I802_DEBUG_INC(local->tx_expand_skb_head);
- /* Since we have to reallocate the buffer, make sure that there
- * is enough room for possible WEP IV/ICV and TKIP (8 bytes
- * before payload and 12 after). */
- if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8),
- 12, GFP_ATOMIC)) {
- printk(KERN_DEBUG "%s: failed to reallocate TX buffer"
- "\n", dev->name);
- goto fail;
- }
- }
-
- if (encaps_data) {
- memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
- nh_pos += encaps_len;
- h_pos += encaps_len;
- }
- memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
- nh_pos += hdrlen;
- h_pos += hdrlen;
-
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
- memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
- pkt_data->magic = IEEE80211_CB_MAGIC;
- pkt_data->sdata = sdata;
- pkt_data->control.do_not_encrypt = no_encrypt;
-
- skb->dev = sdata->master;
- sdata->stats.tx_packets++;
- sdata->stats.tx_bytes += skb->len;
-
- /* Update skb pointers to various headers since this modified frame
- * is going to go through Linux networking code that may potentially
- * need things like pointer to IP header. */
- skb->mac.raw = skb->data;
- skb->nh.raw = skb->data + nh_pos;
- skb->h.raw = skb->data + h_pos;
-
-
- dev_queue_xmit(skb);
-
- return 0;
-
- fail:
- if (!ret)
- dev_kfree_skb(skb);
-
- return ret;
-}
-
-
-/*
- * This is the transmit routine for the 802.11 type interfaces
- * called by upper layers of the linux networking
- * stack when it has a frame to transmit
- */
-static int
-ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_tx_packet_data *pkt_data;
- struct ieee80211_hdr *hdr;
- u16 fc;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- if (skb->len < 10) {
- dev_kfree_skb(skb);
- return 0;
- }
-
- hdr = (struct ieee80211_hdr *) skb->data;
- fc = le16_to_cpu(hdr->frame_control);
-
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
- memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
- pkt_data->magic = IEEE80211_CB_MAGIC;
- pkt_data->sdata = sdata;
-
- if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
- WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP)
- pkt_data->control.pkt_type = PKT_PROBE_RESP;
-
- skb->priority = 20; /* use hardcode priority for mgmt TX queue */
- skb->dev = sdata->master;
-
- /*
- * We're using the protocol field of the the frame control header
- * to request TX callback for hostapd. BIT(1) is checked.
- */
- if ((fc & BIT(1)) == BIT(1)) {
- pkt_data->control.req_tx_status = 1;
- fc &= ~BIT(1);
- hdr->frame_control = cpu_to_le16(fc);
- }
-
-
-
- pkt_data->control.do_not_encrypt = !(fc & WLAN_FC_ISWEP);
-
- sdata->stats.tx_packets++;
- sdata->stats.tx_bytes += skb->len;
-
- dev_queue_xmit(skb);
-
- return 0;
-}
-
-
-static void ieee80211_beacon_add_tim(struct ieee80211_local *local,
- struct ieee80211_if_norm *bss,
- struct sk_buff *skb)
-{
- u8 *pos, *tim;
- int aid0 = 0;
- int i, num_bits = 0, n1, n2;
- u8 bitmap[251];
-
- /* Generate bitmap for TIM only if there are any STAs in power save
- * mode. */
- if (atomic_read(&bss->num_sta_ps) > 0 && bss->max_aid > 0) {
- memset(bitmap, 0, sizeof(bitmap));
- spin_lock_bh(&local->sta_lock);
- for (i = 0; i < bss->max_aid; i++) {
- if (bss->sta_aid[i] &&
- (!skb_queue_empty(&bss->sta_aid[i]->ps_tx_buf) ||
- !skb_queue_empty(&bss->sta_aid[i]->tx_filtered)))
- {
- bitmap[(i + 1) / 8] |= 1 << (i + 1) % 8;
- num_bits++;
- }
- }
- spin_unlock_bh(&local->sta_lock);
- }
-
- if (bss->dtim_count == 0)
- bss->dtim_count = bss->dtim_period - 1;
- else
- bss->dtim_count--;
-
- tim = pos = (u8 *) skb_put(skb, 6);
- *pos++ = WLAN_EID_TIM;
- *pos++ = 4;
- *pos++ = bss->dtim_count;
- *pos++ = bss->dtim_period;
-
- if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) {
- aid0 = 1;
- }
-
- if (num_bits) {
- /* Find largest even number N1 so that bits numbered 1 through
- * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
- * (N2 + 1) x 8 through 2007 are 0. */
- n1 = 0;
- for (i = 0; i < sizeof(bitmap); i++) {
- if (bitmap[i]) {
- n1 = i & 0xfe;
- break;
- }
- }
- n2 = n1;
- for (i = sizeof(bitmap) - 1; i >= n1; i--) {
- if (bitmap[i]) {
- n2 = i;
- break;
- }
- }
-
- /* Bitmap control */
- *pos++ = n1 | (aid0 ? 1 : 0);
- /* Part Virt Bitmap */
- memcpy(pos, bitmap + n1, n2 - n1 + 1);
-
- tim[1] = n2 - n1 + 4;
- skb_put(skb, n2 - n1);
- } else {
- *pos++ = aid0 ? 1 : 0; /* Bitmap control */
- *pos++ = 0; /* Part Virt Bitmap */
- }
-}
-
-
-
-
-struct sk_buff * ieee80211_beacon_get(struct net_device *dev, int bss_idx,
- struct ieee80211_tx_control *control)
-{
- struct ieee80211_local *local = dev->priv;
- struct sk_buff *skb;
- struct net_device *bdev;
- struct ieee80211_sub_if_data *sdata = NULL;
- struct ieee80211_if_norm *norm = NULL;
- struct ieee80211_rate *rate;
- struct rate_control_extra extra;
- u8 *b_head, *b_tail;
- int bh_len, bt_len;
-
-
- spin_lock_bh(&local->sub_if_lock);
- if (bss_idx < 0 || bss_idx >= local->bss_dev_count)
- bdev = NULL;
- else {
- bdev = local->bss_devs[bss_idx];
- sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
- norm = &sdata->u.norm;
- }
- spin_unlock_bh(&local->sub_if_lock);
-
- if (bdev == NULL || norm == NULL || norm->beacon_head == NULL) {
-#ifdef CONFIG_IEEE80211_VERBOSE_DEBUG
- if (net_ratelimit())
- printk(KERN_DEBUG "no beacon data avail for idx=%d "
- "(%s)\n", bss_idx, bdev ? bdev->name : "N/A");
-#endif /* CONFIG_IEEE80211_VERBOSE_DEBUG */
- return NULL;
- }
-
- /* Assume we are generating the normal beacon locally */
- b_head = norm->beacon_head;
- b_tail = norm->beacon_tail;
- bh_len = norm->beacon_head_len;
- bt_len = norm->beacon_tail_len;
-
-
- skb = dev_alloc_skb(bh_len + bt_len + 256 /* maximum TIM len */);
- if (!skb)
- return NULL;
-
- memcpy(skb_put(skb, bh_len), b_head, bh_len);
-
- ieee80211_beacon_add_tim(local, norm, skb);
-
- if (b_tail) {
- memcpy(skb_put(skb, bt_len), b_tail, bt_len);
- }
-
- memset(&extra, 0, sizeof(extra));
- extra.endidx = local->num_curr_rates;
-
-
- rate = rate_control_get_rate(dev, skb, &extra);
- if (rate == NULL) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate "
- "found\n", dev->name);
- }
- dev_kfree_skb(skb);
- return NULL;
- }
-
- control->tx_rate = (local->short_preamble &&
- (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
- rate->val2 : rate->val;
- control->antenna_sel = local->conf.antenna_sel;
- control->power_level = local->conf.power_level;
- control->no_ack = 1;
- control->retry_limit = 1;
- control->rts_cts_duration = 0;
- control->clear_dst_mask = 1;
-
-
- norm->num_beacons++;
- return skb;
-}
-
-struct sk_buff *
-ieee80211_get_buffered_bc(struct net_device *dev, int bss_idx,
- struct ieee80211_tx_control *control)
-{
- struct ieee80211_local *local = dev->priv;
- struct sk_buff *skb;
- struct sta_info *sta;
- ieee80211_tx_handler *handler;
- struct ieee80211_txrx_data tx;
- ieee80211_txrx_result res = TXRX_DROP;
- struct net_device *bdev;
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_if_norm *bss;
-
-
- spin_lock_bh(&local->sub_if_lock);
- if (bss_idx < 0 || bss_idx >= local->bss_dev_count) {
- bdev = NULL;
- bss = NULL;
- } else {
- bdev = local->bss_devs[bss_idx];
- sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
- bss = &sdata->u.norm;
- }
- spin_unlock_bh(&local->sub_if_lock);
- if (bdev == NULL || bss == NULL || bss->beacon_head == NULL)
- return NULL;
-
- if (bss->dtim_count != 0)
- return NULL; /* send buffered bc/mc only after DTIM beacon */
- skb = skb_dequeue(&bss->ps_bc_buf);
- memset(control, 0, sizeof(*control));
- if (skb == NULL)
- return NULL;
- local->total_ps_buffered--;
-
- if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) {
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- /* more buffered multicast/broadcast frames ==> set MoreData
- * flag in IEEE 802.11 header to inform PS STAs */
- hdr->frame_control |= cpu_to_le16(WLAN_FC_MOREDATA);
- }
-
- ieee80211_tx_prepare(&tx, skb, dev, control);
- sta = tx.sta;
- tx.u.tx.ps_buffered = 1;
-
- for (handler = local->tx_handlers; *handler != NULL; handler++) {
- res = (*handler)(&tx);
- if (res == TXRX_DROP || res == TXRX_QUEUED)
- break;
- }
-
- if (res == TXRX_DROP) {
- I802_DEBUG_INC(local->tx_handlers_drop);
- dev_kfree_skb(skb);
- skb = NULL;
- } else if (res == TXRX_QUEUED) {
- I802_DEBUG_INC(local->tx_handlers_queued);
- skb = NULL;
- }
-
- if (sta)
- sta_info_release(local, sta);
-
- return skb;
-}
-
-
-int ieee80211_hw_config(struct net_device *dev)
-{
- struct ieee80211_local *local = dev->priv;
- int i, ret = 0;
-
-#ifdef CONFIG_IEEE80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d mode=%d "
- "phymode=%d\n", local->conf.channel, local->conf.freq,
- local->conf.mode, local->conf.phymode);
-#endif /* CONFIG_IEEE80211_VERBOSE_DEBUG */
-
- if (local->hw->config)
- ret = local->hw->config(dev, &local->conf);
-
- for (i = 0; i < local->hw->num_modes; i++) {
- struct ieee80211_hw_modes *mode = &local->hw->modes[i];
- if (mode->mode == local->conf.phymode) {
- if (local->curr_rates != mode->rates) {
- rate_control_clear(local);
- }
- local->curr_rates = mode->rates;
- local->num_curr_rates = mode->num_rates;
- ieee80211_prepare_rates(dev);
- break;
- }
- }
-
- return ret;
-}
-
-
-struct ieee80211_conf *ieee80211_get_hw_conf(struct net_device *dev)
-{
- struct ieee80211_local *local = dev->priv;
- return &local->conf;
-}
-
-
-static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
-{
- /* FIX: what would be proper limits for MTU?
- * This interface uses 802.3 frames. */
- if (new_mtu < 256 || new_mtu > 2304 - 24 - 6) {
- printk(KERN_WARNING "%s: invalid MTU %d\n",
- dev->name, new_mtu);
- return -EINVAL;
- }
-
-#ifdef CONFIG_IEEE80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
-#endif /* CONFIG_IEEE80211_VERBOSE_DEBUG */
- dev->mtu = new_mtu;
- return 0;
-}
-
-
-static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
-{
- /* FIX: what would be proper limits for MTU?
- * This interface uses 802.11 frames. */
- if (new_mtu < 256 || new_mtu > 2304) {
- printk(KERN_WARNING "%s: invalid MTU %d\n",
- dev->name, new_mtu);
- return -EINVAL;
- }
-
-#ifdef CONFIG_IEEE80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
-#endif /* CONFIG_IEEE80211_VERBOSE_DEBUG */
- dev->mtu = new_mtu;
- return 0;
-}
-
-
-static void ieee80211_tx_timeout(struct net_device *dev)
-{
- struct ieee80211_local *local = dev->priv;
-
- printk(KERN_WARNING "%s: resetting interface.\n", dev->name);
-
- if (local->hw->reset(dev))
- printk(KERN_ERR "%s: failed to reset interface.\n", dev->name);
- else
- netif_wake_queue(dev);
-}
-
-
-static int ieee80211_set_mac_address(struct net_device *dev, void *addr)
-{
- struct ieee80211_local *local = dev->priv;
- struct sockaddr *a = addr;
- struct list_head *ptr;
- int res;
-
- if (!local->hw->set_mac_address)
- return -EOPNOTSUPP;
-
- res = local->hw->set_mac_address(dev, addr);
- if (res)
- return res;
-
- list_for_each(ptr, &local->sub_if_list) {
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
- memcpy(sdata->dev->dev_addr, a->sa_data, ETH_ALEN);
- }
-
- return 0;
-}
-
-
-static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata;
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- return &(sdata->stats);
-}
-
-
-static int ieee80211_open(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_local *local = dev->priv;
- int res;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- if (local->open_count == 0) {
- res = local->hw->open(sdata->master);
- if (res)
- return res;
- ieee80211_init_scan(sdata->master);
- }
- local->open_count++;
-
- netif_start_queue(dev);
- return 0;
-}
-
-
-static int ieee80211_stop(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_local *local = dev->priv;
- int res;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- netif_stop_queue(dev);
-
- local->open_count--;
- if (local->open_count == 0) {
- ieee80211_stop_scan(sdata->master);
- res = local->hw->stop(sdata->master);
- if (res)
- return res;
- }
-
- return 0;
-}
-
-
-static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
-{
- memcpy(haddr, skb->mac.raw + 10, ETH_ALEN); /* addr2 */
- return ETH_ALEN;
-}
-
-
-static struct net_device *
-ieee80211_get_wds_dev(struct ieee80211_local *local, u8 *addr)
-{
- struct list_head *ptr;
-
- list_for_each(ptr, &local->sub_if_list) {
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
- if (sdata->type == IEEE80211_SUB_IF_TYPE_WDS &&
- memcmp(addr, sdata->u.wds.remote_addr, ETH_ALEN) == 0)
- return sdata->dev;
- }
-
- return NULL;
-}
-
-
-static struct net_device * ieee80211_own_bssid(struct ieee80211_local *local,
- u8 *addr)
-{
- int i;
- struct net_device *dev = NULL;
-
- spin_lock_bh(&local->sub_if_lock);
- for (i = 0; i < local->bss_dev_count; i++) {
- if ((memcmp(local->bss_devs[i]->dev_addr, addr, ETH_ALEN) == 0)
- ) {
- dev = local->bss_devs[i];
- break;
- }
- }
- spin_unlock_bh(&local->sub_if_lock);
-
- return dev;
-}
-
-
-
-
-static struct net_device * ieee80211_sta_bssid(struct ieee80211_local *local,
- u8 *addr, u8 *a1,
- int *sta_multicast)
-{
- struct list_head *ptr;
- int multicast;
- u8 *own_addr = local->mdev->dev_addr;
-
- multicast = a1[0] & 0x01;
-
- /* Try O(1) lookup for a common case of only one AP being used. */
- if (own_addr[0] == a1[0] && own_addr[1] == a1[1] &&
- own_addr[2] == a1[2]) {
- int index = (((int) a1[3] << 16) | ((int) a1[4] << 8) | a1[5])
- - (((int) own_addr[3] << 16) |
- ((int) own_addr[4] << 8) | own_addr[5]);
- if (index >= 0 && index < local->conf.bss_count &&
- local->sta_devs[index]) {
- struct net_device *dev = local->sta_devs[index];
- struct ieee80211_sub_if_data *sdata;
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (memcmp(addr, sdata->u.sta.bssid, ETH_ALEN) == 0) {
- *sta_multicast = multicast;
- return dev;
- }
- }
- }
-
- if (!multicast)
- return NULL;
-
- /* Could not find station interface, resort to O(n) lookup. */
- list_for_each(ptr, &local->sub_if_list) {
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
- if (sdata->type != IEEE80211_SUB_IF_TYPE_STA)
- continue;
- if (!multicast &&
- memcmp(a1, sdata->dev->dev_addr, ETH_ALEN) != 0)
- continue;
-
- if (memcmp(addr, sdata->u.sta.bssid, ETH_ALEN) == 0 ||
- (memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0 &&
- local->conf.mode == IW_MODE_ADHOC)) {
- *sta_multicast = multicast;
- return sdata->dev;
- }
- }
-
- return NULL;
-}
-
-
-static int ieee80211_own_addr(struct net_device *dev, u8 *addr)
-{
- struct ieee80211_local *local = dev->priv;
- u8 *own = dev->dev_addr;
- int index;
-
- /* Optimization: assume that BSSID mask does not change for first
- * three octets. */
- if (own[0] != addr[0] || own[1] != addr[1] || own[2] != addr[2])
- return 0;
-
- index = (((int) addr[3] << 16) | ((int) addr[4] << 8) | addr[5]) -
- (((int) own[3] << 16) | ((int) own[4] << 8) | own[5]);
- if (index >= 0 && index < local->conf.bss_count &&
- local->sta_devs[index])
- return 1;
-
- return 0;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
-{
- struct net_device *dev = rx->dev;
- struct ieee80211_local *local = rx->local;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
- u16 fc, hdrlen, ethertype;
- u8 *payload;
- u8 dst[ETH_ALEN];
- u8 src[ETH_ALEN];
- struct sk_buff *skb = rx->skb, *skb2;
- struct ieee80211_sub_if_data *sdata;
-
- fc = rx->fc;
- if (unlikely(WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_DATA))
- return TXRX_CONTINUE;
-
- if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
- return TXRX_DROP;
-
- hdrlen = ieee80211_get_hdrlen(fc);
-
- /* convert IEEE 802.11 header + possible LLC headers into Ethernet
- * header
- * IEEE 802.11 address fields:
- * ToDS FromDS Addr1 Addr2 Addr3 Addr4
- * 0 0 DA SA BSSID n/a
- * 0 1 DA BSSID SA n/a
- * 1 0 BSSID SA DA n/a
- * 1 1 RA TA DA SA
- */
-
- switch (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
- case WLAN_FC_TODS:
- /* BSSID SA DA */
- memcpy(dst, hdr->addr3, ETH_ALEN);
- memcpy(src, hdr->addr2, ETH_ALEN);
-
- if (unlikely(local->conf.mode != IW_MODE_MASTER ||
- !ieee80211_own_bssid(local, hdr->addr1))) {
- printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID="
- MACSTR " SA=" MACSTR " DA=" MACSTR ")\n",
- dev->name, MAC2STR(hdr->addr1),
- MAC2STR(hdr->addr2), MAC2STR(hdr->addr3));
- return TXRX_DROP;
- }
- break;
- case (WLAN_FC_TODS | WLAN_FC_FROMDS):
- /* RA TA DA SA */
- memcpy(dst, hdr->addr3, ETH_ALEN);
- memcpy(src, hdr->addr4, ETH_ALEN);
-
- dev = ieee80211_get_wds_dev(local, hdr->addr2);
- if (!dev || memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) != 0) {
- printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA="
- MACSTR " TA=" MACSTR " DA=" MACSTR " SA="
- MACSTR ")\n",
- rx->dev->name, MAC2STR(hdr->addr1),
- MAC2STR(hdr->addr2), MAC2STR(hdr->addr3),
- MAC2STR(hdr->addr4));
- return TXRX_DROP;
- }
- break;
- case WLAN_FC_FROMDS:
- /* DA BSSID SA */
- memcpy(dst, hdr->addr1, ETH_ALEN);
- memcpy(src, hdr->addr3, ETH_ALEN);
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (sdata->type != IEEE80211_SUB_IF_TYPE_STA ||
- memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0 ||
- memcmp(hdr->addr2, sdata->u.sta.bssid, ETH_ALEN) != 0) {
- return TXRX_DROP;
- }
- break;
- case 0:
- /* DA SA BSSID */
- memcpy(dst, hdr->addr1, ETH_ALEN);
- memcpy(src, hdr->addr2, ETH_ALEN);
-
- if (local->conf.mode != IW_MODE_ADHOC ||
- memcmp(hdr->addr3, local->bssid, ETH_ALEN) != 0) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: dropped IBSS frame (DA="
- MACSTR " SA=" MACSTR " BSSID=" MACSTR
- ")\n",
- dev->name, MAC2STR(hdr->addr1),
- MAC2STR(hdr->addr2),
- MAC2STR(hdr->addr3));
- }
- return TXRX_DROP;
- }
- break;
- }
-
- payload = skb->data + hdrlen;
-
- if (unlikely(skb->len - hdrlen < 8)) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: RX too short data frame "
- "payload\n", dev->name);
- }
- return TXRX_DROP;
- }
-
- ethertype = (payload[6] << 8) | payload[7];
-
- if (likely((memcmp(payload, rfc1042_header, 6) == 0 &&
- ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
- memcmp(payload, bridge_tunnel_header, 6) == 0)) {
- /* remove RFC1042 or Bridge-Tunnel encapsulation and
- * replace EtherType */
- skb_pull(skb, hdrlen + 6);
- memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
- memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
- } else {
- struct ethhdr *ehdr;
- unsigned short len;
- skb_pull(skb, hdrlen);
- len = htons(skb->len);
- ehdr = (struct ethhdr *)skb_push(skb, sizeof(struct ethhdr));
- memcpy(ehdr->h_dest, dst, ETH_ALEN);
- memcpy(ehdr->h_source, src, ETH_ALEN);
- ehdr->h_proto = len;
- }
-
- if (rx->sta && !rx->sta->assoc_ap &&
- !(rx->sta && (rx->sta->flags & WLAN_STA_WDS)))
- skb->dev = rx->sta->dev;
- else
- skb->dev = dev;
-
- skb2 = NULL;
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- /*
- * don't count the master since the low level code
- * counts it already for us.
- */
- if (skb->dev != sdata->master) {
- sdata->stats.rx_packets++;
- sdata->stats.rx_bytes += skb->len;
- }
-
- if (local->bridge_packets && sdata->type != IEEE80211_SUB_IF_TYPE_WDS
- && sdata->type != IEEE80211_SUB_IF_TYPE_STA) {
- if (MULTICAST_ADDR(skb->data)) {
- /* send multicast frames both to higher layers in
- * local net stack and back to the wireless media */
- skb2 = skb_copy(skb, GFP_ATOMIC);
- if (skb2 == NULL)
- printk(KERN_DEBUG "%s: failed to clone "
- "multicast frame\n", dev->name);
- } else {
- struct sta_info *dsta;
- dsta = sta_info_get(local, skb->data);
- if (dsta && dsta->dev == NULL) {
- printk(KERN_DEBUG "Station with null dev "
- "structure!\n");
- } else if (dsta && dsta->dev == dev) {
- /* Destination station is associated to this
- * AP, so send the frame directly to it and
- * do not pass the frame to local net stack.
- */
- skb2 = skb;
- skb = NULL;
- }
- if (dsta)
- sta_info_release(local, dsta);
- }
- }
-
- if (skb) {
- /* deliver to local stack */
- skb->protocol = eth_type_trans(skb, dev);
- memset(skb->cb, 0, sizeof(skb->cb));
- netif_rx(skb);
- }
-
- if (skb2) {
- /* send to wireless media */
- skb2->protocol = __constant_htons(ETH_P_802_3);
- skb2->mac.raw = skb2->nh.raw = skb2->data;
- dev_queue_xmit(skb2);
- }
-
- return TXRX_QUEUED;
-}
-
-
-static struct ieee80211_rate *
-ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate)
-{
- int m, r;
-
- for (m = 0; m < local->hw->num_modes; m++) {
- struct ieee80211_hw_modes *mode = &local->hw->modes[m];
- if (mode->mode != phymode)
- continue;
- for (r = 0; r < mode->num_rates; r++) {
- struct ieee80211_rate *rate = &mode->rates[r];
- if (rate->val == hw_rate ||
- (rate->flags & IEEE80211_RATE_PREAMBLE2 &&
- rate->val2 == hw_rate))
- return rate;
- }
- }
-
- return NULL;
-}
-
-
-void
-ieee80211_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
- struct ieee80211_rx_status *status, u32 msg_type)
-{
- struct ieee80211_local *local = dev->priv;
- struct ieee80211_frame_info *fi;
- size_t hlen;
- struct ieee80211_sub_if_data *sdata;
-
- dev = local->apdev;
- skb->dev = dev;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- if (skb_headroom(skb) < sizeof(struct ieee80211_frame_info)) {
- I802_DEBUG_INC(local->rx_expand_skb_head);
- if (pskb_expand_head(skb, sizeof(struct ieee80211_frame_info),
- 0, GFP_ATOMIC)) {
- dev_kfree_skb(skb);
- return;
- }
- }
-
- hlen = sizeof(struct ieee80211_frame_info);
- if (msg_type == ieee80211_msg_monitor)
- hlen -= sizeof(fi->msg_type);
-
- fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
- memset(fi, 0, hlen);
- if (msg_type != ieee80211_msg_monitor)
- fi->msg_type = htonl(msg_type);
- fi->version = htonl(IEEE80211_FI_VERSION);
- fi->length = htonl(hlen);
- if (status) {
-// struct timespec ts;
- struct ieee80211_rate *rate;
-
-#if 0
- jiffies_to_timespec(status->hosttime, &ts);
- fi->hosttime = cpu_to_be64(ts.tv_sec * 1000000 +
- ts.tv_nsec / 1000);
- fi->mactime = cpu_to_be64(status->mactime);
-#endif
- 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 = 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 = 0xffffffff; /* no clue */
- fi->ssi_type = htonl(ieee80211_ssi_raw);
- fi->ssi_signal = htonl(status->ssi);
- fi->ssi_noise = 0x00000000;
- fi->encoding = 0;
- } else {
- fi->ssi_type = htonl(ieee80211_ssi_none);
- }
-
- sdata->stats.rx_packets++;
- sdata->stats.rx_bytes += skb->len;
-
- skb->mac.raw = skb->data;
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- skb->pkt_type = PACKET_OTHERHOST;
- skb->protocol = __constant_htons(ETH_P_802_2);
- memset(skb->cb, 0, sizeof(skb->cb));
- netif_rx(skb);
-}
-
-
-int ieee80211_radar_status(struct net_device *dev, int channel, int radar,
- int radar_type)
-{
- struct sk_buff *skb;
- struct ieee80211_radar_info *msg;
-
- skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
- sizeof(struct ieee80211_radar_info));
-
- if (skb == NULL)
- 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(dev, skb, 0, ieee80211_msg_radar);
- return 0;
-}
-
-
-int ieee80211_set_aid_for_sta(struct net_device *dev, u8 *peer_address,
- u16 aid)
-{
- struct sk_buff *skb;
- struct ieee80211_msg_set_aid_for_sta *msg;
-
- skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
- sizeof(struct ieee80211_msg_set_aid_for_sta));
-
- if (skb == NULL)
- return -ENOMEM;
- skb_reserve(skb, sizeof(struct ieee80211_frame_info));
-
- msg = (struct ieee80211_msg_set_aid_for_sta *)
- skb_put(skb, sizeof(struct ieee80211_msg_set_aid_for_sta));
- memcpy(msg->sta_address, peer_address, ETH_ALEN);
- msg->aid = aid;
-
- ieee80211_rx_mgmt(dev, skb, 0, ieee80211_msg_set_aid_for_sta);
- return 0;
-}
-
-
-static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta)
-{
- struct ieee80211_sub_if_data *sdata;
- sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
-
- if (sdata->bss)
- atomic_inc(&sdata->bss->num_sta_ps);
- sta->flags |= WLAN_STA_PS;
- sta->pspoll = 0;
-#ifdef IEEE80211_VERBOSE_DEBUG_PS
- printk(KERN_DEBUG "%s: STA " MACSTR " aid %d enters power "
- "save mode\n", dev->name, MAC2STR(sta->addr), sta->aid);
-#endif /* IEEE80211_VERBOSE_DEBUG_PS */
-}
-
-
-static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta)
-{
- struct ieee80211_local *local = dev->priv;
- struct sk_buff *skb;
- int sent = 0;
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_tx_packet_data *pkt_data;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
- if (sdata->bss)
- atomic_dec(&sdata->bss->num_sta_ps);
- sta->flags &= ~(WLAN_STA_PS | WLAN_STA_TIM);
- sta->pspoll = 0;
- if (!skb_queue_empty(&sta->ps_tx_buf) && local->hw->set_tim)
- local->hw->set_tim(dev, sta->aid, 0);
-#ifdef IEEE80211_VERBOSE_DEBUG_PS
- printk(KERN_DEBUG "%s: STA " MACSTR " aid %d exits power "
- "save mode\n", dev->name, MAC2STR(sta->addr), sta->aid);
-#endif /* IEEE80211_VERBOSE_DEBUG_PS */
- /* Send all buffered frames to the station */
- while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
- pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
- sent++;
- pkt_data->control.requeue = 1;
- dev_queue_xmit(skb);
- }
- while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
- pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
- local->total_ps_buffered--;
- sent++;
-#ifdef IEEE80211_VERBOSE_DEBUG_PS
- printk(KERN_DEBUG "%s: STA " MACSTR " aid %d send PS frame "
- "since STA not sleeping anymore\n", dev->name,
- MAC2STR(sta->addr), sta->aid);
-#endif /* IEEE80211_VERBOSE_DEBUG_PS */
- pkt_data->control.requeue = 1;
- dev_queue_xmit(skb);
- }
-
- return sent;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx)
-{
- struct sk_buff *skb;
- int no_pending_pkts;
-
- if (likely(!rx->sta || WLAN_FC_GET_TYPE(rx->fc) != WLAN_FC_TYPE_CTRL ||
- WLAN_FC_GET_STYPE(rx->fc) != WLAN_FC_STYPE_PSPOLL))
- return TXRX_CONTINUE;
-
- skb = skb_dequeue(&rx->sta->tx_filtered);
- if (skb == NULL) {
- skb = skb_dequeue(&rx->sta->ps_tx_buf);
- if (skb)
- rx->local->total_ps_buffered--;
- }
- no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) &&
- skb_queue_empty(&rx->sta->ps_tx_buf);
-
- if (skb) {
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) skb->data;
-
- /* tell TX path to send one frame even though the STA may
- * still remain is PS mode after this frame exchange */
- rx->sta->pspoll = 1;
-
-#ifdef IEEE80211_VERBOSE_DEBUG_PS
- printk(KERN_DEBUG "STA " MACSTR " aid %d: PS Poll (entries "
- "after %d)\n",
- MAC2STR(rx->sta->addr), rx->sta->aid,
- skb_queue_len(&rx->sta->ps_tx_buf));
-#endif /* IEEE80211_VERBOSE_DEBUG_PS */
-
- /* Use MoreData flag to indicate whether there are more
- * buffered frames for this STA */
- if (no_pending_pkts) {
- hdr->frame_control &= cpu_to_le16(~WLAN_FC_MOREDATA);
- rx->sta->flags &= ~WLAN_STA_TIM;
- } else
- hdr->frame_control |= cpu_to_le16(WLAN_FC_MOREDATA);
-
- dev_queue_xmit(skb);
-
- if (no_pending_pkts && rx->local->hw->set_tim)
- rx->local->hw->set_tim(rx->dev, rx->sta->aid, 0);
-#ifdef IEEE80211_VERBOSE_DEBUG_PS
- } else if (!rx->u.rx.sent_ps_buffered) {
- printk(KERN_DEBUG "%s: STA " MACSTR " sent PS Poll even "
- "though there is no buffered frames for it\n",
- rx->dev->name, MAC2STR(rx->sta->addr));
-#endif /* IEEE80211_VERBOSE_DEBUG_PS */
-
- }
-
- /* Free PS Poll skb here instead of returning TXRX_DROP that would
- * count as an dropped frame. */
- dev_kfree_skb(rx->skb);
-
- return TXRX_QUEUED;
-}
-
-
-static inline struct ieee80211_fragment_entry *
-ieee80211_reassemble_add(struct ieee80211_local *local,
- unsigned int frag, unsigned int seq, int rx_queue,
- struct sk_buff **skb)
-{
- struct ieee80211_fragment_entry *entry;
- int idx;
-
- idx = local->fragment_next;
- entry = &local->fragments[local->fragment_next++];
- if (local->fragment_next >= IEEE80211_FRAGMENT_MAX)
- local->fragment_next = 0;
-
- if (entry->skb) {
-#ifdef CONFIG_IEEE80211_DEBUG
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) entry->skb->data;
- printk(KERN_DEBUG "%s: RX reassembly removed oldest "
- "fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
- "addr1=" MACSTR " addr2=" MACSTR "\n",
- local->mdev->name, idx,
- jiffies - entry->first_frag_time, entry->seq,
- entry->last_frag, MAC2STR(hdr->addr1),
- MAC2STR(hdr->addr2));
-#endif /* CONFIG_IEEE80211_DEBUG */
- dev_kfree_skb(entry->skb);
- }
-
- entry->skb = *skb;
- *skb = NULL;
- entry->first_frag_time = jiffies;
- entry->seq = seq;
- entry->rx_queue = rx_queue;
- entry->last_frag = frag;
- entry->ccmp = 0;
-
- return entry;
-}
-
-
-static inline struct ieee80211_fragment_entry *
-ieee80211_reassemble_find(struct ieee80211_local *local,
- u16 fc, unsigned int frag, unsigned int seq,
- int rx_queue, struct ieee80211_hdr *hdr)
-{
- struct ieee80211_fragment_entry *entry;
- int i, idx;
-
- idx = local->fragment_next;
- for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
- struct ieee80211_hdr *f_hdr;
- u16 f_fc;
-
- idx--;
- if (idx < 0)
- idx = IEEE80211_FRAGMENT_MAX - 1;
-
- entry = &local->fragments[idx];
- if (!entry->skb || entry->seq != seq ||
- entry->rx_queue != rx_queue ||
- entry->last_frag + 1 != frag)
- continue;
-
- f_hdr = (struct ieee80211_hdr *) entry->skb->data;
- f_fc = le16_to_cpu(f_hdr->frame_control);
-
- if (WLAN_FC_GET_TYPE(fc) != WLAN_FC_GET_TYPE(f_fc) ||
- memcmp(hdr->addr1, f_hdr->addr1, ETH_ALEN) != 0 ||
- memcmp(hdr->addr2, f_hdr->addr2, ETH_ALEN) != 0)
- continue;
-
- if (entry->first_frag_time + 2 * HZ < jiffies) {
- dev_kfree_skb(entry->skb);
- entry->skb = NULL;
- continue;
- }
- return entry;
- }
-
- return NULL;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_hdr *hdr;
- u16 sc;
- unsigned int frag, seq;
- struct ieee80211_fragment_entry *entry;
-
- hdr = (struct ieee80211_hdr *) rx->skb->data;
- sc = le16_to_cpu(hdr->seq_ctrl);
- frag = WLAN_GET_SEQ_FRAG(sc);
-
- if (likely((!(rx->fc & WLAN_FC_MOREFRAG) && frag == 0) ||
- (rx->skb)->len < 24 || MULTICAST_ADDR(hdr->addr1))) {
- /* not fragmented */
- goto out;
- }
- I802_DEBUG_INC(rx->local->rx_handlers_fragments);
-
- seq = WLAN_GET_SEQ_SEQ(sc);
-
- if (frag == 0) {
- /* This is the first fragment of a new frame. */
- entry = ieee80211_reassemble_add(rx->local, frag, seq,
- rx->u.rx.queue, &(rx->skb));
- if (rx->key && rx->key->alg == ALG_CCMP &&
- (rx->fc & WLAN_FC_ISWEP)) {
- /* Store CCMP PN so that we can verify that the next
- * fragment has a sequential PN value. */
- entry->ccmp = 1;
- memcpy(entry->last_pn,
- rx->key->u.ccmp.rx_pn[rx->u.rx.queue],
- CCMP_PN_LEN);
- }
- return TXRX_QUEUED;
- }
-
- /* This is a fragment for a frame that should already be pending in
- * fragment cache. Add this fragment to the end of the pending entry.
- */
- entry = ieee80211_reassemble_find(rx->local, rx->fc, frag, seq,
- rx->u.rx.queue, hdr);
- if (!entry) {
- I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
- return TXRX_DROP;
- }
-
- /* Verify that MPDUs within one MSDU have sequential PN values.
- * (IEEE 802.11i, 8.3.3.4.5) */
- if (entry->ccmp) {
- int i;
- u8 pn[CCMP_PN_LEN], *rpn;
- if (rx->key == NULL || rx->key->alg != ALG_CCMP)
- return TXRX_DROP;
- memcpy(pn, entry->last_pn, CCMP_PN_LEN);
- for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
- pn[i]++;
- if (pn[i])
- break;
- }
- rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue];
- if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
- printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential"
- " A2=" MACSTR " PN=%02x%02x%02x%02x%02x%02x "
- "(expected %02x%02x%02x%02x%02x%02x)\n",
- rx->dev->name, MAC2STR(hdr->addr2),
- rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5],
- pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]);
- return TXRX_DROP;
- }
- memcpy(entry->last_pn, pn, CCMP_PN_LEN);
- }
-
- /* TODO: could gather list of skb's and reallocate data buffer only
- * after finding out the total length of the frame */
- skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc));
- if (skb_tailroom(entry->skb) < rx->skb->len) {
- I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
- if (unlikely(pskb_expand_head(entry->skb, 0, rx->skb->len,
- GFP_ATOMIC))) {
- I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
- return TXRX_DROP;
- }
- }
- memcpy(skb_put(entry->skb, rx->skb->len), rx->skb->data, rx->skb->len);
- entry->last_frag = frag;
- dev_kfree_skb(rx->skb);
-
- if (rx->fc & WLAN_FC_MOREFRAG) {
- rx->skb = NULL;
- return TXRX_QUEUED;
- }
-
- /* Complete frame has been reassembled - process it now */
- rx->skb = entry->skb;
- rx->fragmented = 1;
- entry->skb = NULL;
-
- out:
- if (rx->sta)
- rx->sta->rx_packets++;
- if (MULTICAST_ADDR(hdr->addr1))
- rx->local->dot11MulticastReceivedFrameCount++;
-#ifdef IEEE80211_LEDS
- else
- ieee80211_rx_led(2, rx->dev);
-#endif /* IEEE80211_LEDS */
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_monitor(struct ieee80211_txrx_data *rx)
-{
- if (rx->local->conf.mode == IW_MODE_MONITOR) {
- ieee80211_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status,
- ieee80211_msg_monitor);
- return TXRX_QUEUED;
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_check(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_hdr *hdr;
- int always_sta_key;
- hdr = (struct ieee80211_hdr *) rx->skb->data;
-
- /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
- if (rx->sta && !MULTICAST_ADDR(hdr->addr1)) {
- if (unlikely(rx->fc & WLAN_FC_RETRY &&
- rx->sta->last_seq_ctrl[rx->u.rx.queue] ==
- hdr->seq_ctrl)) {
- rx->local->dot11FrameDuplicateCount++;
- rx->sta->num_duplicates++;
- return TXRX_DROP;
- } else
- rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl;
- }
-
- if (rx->local->hw->rx_includes_fcs && rx->skb->len > FCS_LEN)
- skb_trim(rx->skb, rx->skb->len - FCS_LEN);
-
- if (unlikely(rx->skb->len < 16)) {
- I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
- return TXRX_DROP;
- }
-
- /* Filter out foreign unicast packets when in promiscuous mode.
- * FIX: Filter out multicast to foreign BSSID. */
- if (rx->local->conf.mode == IW_MODE_INFRA &&
- !MULTICAST_ADDR(hdr->addr1) &&
- !ieee80211_own_addr(rx->dev, hdr->addr1))
- return TXRX_DROP;
-
- /* Drop disallowed frame classes based on STA auth/assoc state;
- * IEEE 802.11, Chap 5.5.
- *
- * 80211.o does filtering only based on association state, i.e., it
- * drops Class 3 frames from not associated stations. hostapd sends
- * deauth/disassoc frames when needed. In addition, hostapd is
- * responsible for filtering on both auth and assoc states.
- */
- if (unlikely((WLAN_FC_GET_TYPE(rx->fc) == WLAN_FC_TYPE_DATA ||
- (WLAN_FC_GET_TYPE(rx->fc) == WLAN_FC_TYPE_CTRL &&
- WLAN_FC_GET_STYPE(rx->fc) == WLAN_FC_STYPE_PSPOLL)) &&
- rx->local->conf.mode != IW_MODE_ADHOC &&
- (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) {
- if (!(rx->fc & WLAN_FC_FROMDS) && !(rx->fc & WLAN_FC_TODS)) {
- /* Drop IBSS frames silently. */
- return TXRX_DROP;
- }
-
- ieee80211_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status,
- ieee80211_msg_sta_not_assoc);
- return TXRX_QUEUED;
- }
-
- if (rx->local->conf.mode == IW_MODE_INFRA)
- always_sta_key = 0;
- else
- always_sta_key = 1;
-
- if (rx->sta && rx->sta->key && always_sta_key) {
- rx->key = rx->sta->key;
- } else {
- if (!rx->sdata) {
- printk(KERN_DEBUG "%s: sdata was null in packet!!\n",
- rx->dev->name);
- printk(KERN_DEBUG "%s: Addr1: " MACSTR "\n",
- rx->dev->name, MAC2STR(hdr->addr1));
- printk(KERN_DEBUG "%s: Addr2: " MACSTR "\n",
- rx->dev->name, MAC2STR(hdr->addr2));
- printk(KERN_DEBUG "%s: Addr3: " MACSTR "\n",
- rx->dev->name, MAC2STR(hdr->addr3));
- return TXRX_DROP;
- }
- if (rx->sta && rx->sta->key)
- rx->key = rx->sta->key;
- else
- rx->key = rx->sdata->default_key;
-
- if (rx->local->hw->wep_include_iv &&
- rx->fc & WLAN_FC_ISWEP) {
- int keyidx = ieee80211_wep_get_keyidx(rx->skb);
-
- if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS &&
- (rx->sta == NULL || rx->sta->key == NULL ||
- keyidx > 0)) {
- rx->key = rx->sdata->keys[keyidx];
- }
- if (!rx->key) {
- printk(KERN_DEBUG "%s: RX WEP frame with "
- "unknown keyidx %d (A1=" MACSTR " A2="
- MACSTR " A3=" MACSTR ")\n",
- rx->dev->name, keyidx,
- MAC2STR(hdr->addr1),
- MAC2STR(hdr->addr2),
- MAC2STR(hdr->addr3));
- ieee80211_rx_mgmt(
- rx->dev, rx->skb, rx->u.rx.status,
- ieee80211_msg_wep_frame_unknown_key);
- return TXRX_QUEUED;
- }
- }
- }
-
- if (rx->fc & WLAN_FC_ISWEP && rx->key) {
- rx->key->tx_rx_count++;
- if (unlikely(rx->local->key_tx_rx_threshold &&
- rx->key->tx_rx_count >
- rx->local->key_tx_rx_threshold)) {
- ieee80211_key_threshold_notify(rx->dev, rx->key,
- rx->sta);
- }
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx)
-{
- struct sta_info *sta = rx->sta;
- struct net_device *dev = rx->dev;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
-
- if (!sta)
- return TXRX_CONTINUE;
-
- /* Update last_rx only for IBSS packets which are for the current
- * BSSID to avoid keeping the current IBSS network alive in cases where
- * other STAs are using different BSSID. */
- if (rx->local->conf.mode == IW_MODE_ADHOC) {
- u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len);
- if (memcmp(bssid, rx->local->bssid, ETH_ALEN) == 0)
- sta->last_rx = jiffies;
- } else
- if (!MULTICAST_ADDR(hdr->addr1) ||
- rx->local->conf.mode == IW_MODE_INFRA) {
- /* Update last_rx only for unicast frames in order to prevent
- * the Probe Request frames (the only broadcast frames from a
- * STA in infrastructure mode) from keeping a connection alive.
- */
- sta->last_rx = jiffies;
- }
- sta->rx_fragments++;
- sta->rx_bytes += rx->skb->len;
- sta->last_rssi = rx->u.rx.status->ssi;
-
- if (!(rx->fc & WLAN_FC_MOREFRAG)) {
- /* Change STA power saving mode only in the end of a frame
- * exchange sequence */
- if ((sta->flags & WLAN_STA_PS) && !(rx->fc & WLAN_FC_PWRMGT))
- rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta);
- else if (!(sta->flags & WLAN_STA_PS) &&
- (rx->fc & WLAN_FC_PWRMGT))
- ap_sta_ps_start(dev, sta);
- }
-
- /* Drop data::nullfunc frames silently, since they are used only to
- * control station power saving mode. */
- if (WLAN_FC_GET_TYPE(rx->fc) == WLAN_FC_TYPE_DATA &&
- WLAN_FC_GET_STYPE(rx->fc) == WLAN_FC_STYPE_NULLFUNC) {
- I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
- /* Update counter and free packet here to avoid counting this
- * as a dropped packed. */
- sta->rx_packets++;
- dev_kfree_skb(rx->skb);
- return TXRX_QUEUED;
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data *rx)
-{
- if (!rx->sta || !(rx->fc & WLAN_FC_ISWEP) ||
- WLAN_FC_GET_TYPE(rx->fc) != WLAN_FC_TYPE_DATA || !rx->key ||
- rx->key->alg != ALG_WEP)
- return TXRX_CONTINUE;
-
- /* Check for weak IVs, if hwaccel did not remove IV from the frame */
- if (rx->local->hw->wep_include_iv ||
- rx->key->force_sw_encrypt || rx->local->conf.sw_decrypt) {
- u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key);
- if (iv) {
- rx->sta->wep_weak_iv_count++;
- }
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx)
-{
- /* If the device handles decryption totally, skip this test */
- if (rx->local->hw->device_hides_wep)
- return TXRX_CONTINUE;
-
- if ((rx->key && rx->key->alg != ALG_WEP) ||
- !(rx->fc & WLAN_FC_ISWEP) ||
- (WLAN_FC_GET_TYPE(rx->fc) != WLAN_FC_TYPE_DATA &&
- (WLAN_FC_GET_TYPE(rx->fc) != WLAN_FC_TYPE_MGMT ||
- WLAN_FC_GET_STYPE(rx->fc) != WLAN_FC_STYPE_AUTH)))
- return TXRX_CONTINUE;
-
- if (!rx->key) {
- printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
- rx->dev->name);
- return TXRX_DROP;
- }
-
- if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
- rx->key->force_sw_encrypt || rx->local->conf.sw_decrypt) {
- if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
- printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
- "failed\n", rx->dev->name);
- return TXRX_DROP;
- }
- } else if (rx->local->hw->wep_include_iv) {
- ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
- /* remove ICV */
- skb_trim(rx->skb, rx->skb->len - 4);
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx)
-{
- if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) &&
- rx->local->conf.mode != IW_MODE_INFRA) {
- /* Pass both encrypted and unencrypted EAPOL frames to user
- * space for processing. */
- ieee80211_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status,
- ieee80211_msg_normal);
- return TXRX_QUEUED;
- }
-
- if (unlikely(rx->sdata->ieee802_1x &&
- WLAN_FC_GET_TYPE(rx->fc) == WLAN_FC_TYPE_DATA &&
- WLAN_FC_GET_STYPE(rx->fc) != WLAN_FC_STYPE_NULLFUNC &&
- (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) &&
- !ieee80211_is_eapol(rx->skb))) {
-#ifdef CONFIG_IEEE80211_DEBUG
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) rx->skb->data;
- printk(KERN_DEBUG "%s: dropped frame from " MACSTR
- " (unauthorized port)\n", rx->dev->name,
- MAC2STR(hdr->addr2));
-#endif /* CONFIG_IEEE80211_DEBUG */
- return TXRX_DROP;
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
-{
- /* If the device handles decryption totally, skip this test */
- if (rx->local->hw->device_hides_wep)
- return TXRX_CONTINUE;
-
- /* Drop unencrypted frames if key is set. */
- if (unlikely(!(rx->fc & WLAN_FC_ISWEP) &&
- WLAN_FC_GET_TYPE(rx->fc) == WLAN_FC_TYPE_DATA &&
- WLAN_FC_GET_STYPE(rx->fc) != WLAN_FC_STYPE_NULLFUNC &&
- (rx->key || rx->sdata->drop_unencrypted) &&
- (rx->sdata->eapol == 0 ||
- !ieee80211_is_eapol(rx->skb)))) {
- printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
- "encryption\n", rx->dev->name);
- return TXRX_DROP;
- }
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_sub_if_data *sdata;
- sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
- if (sdata->type == IEEE80211_SUB_IF_TYPE_STA) {
- ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status);
- } else {
- /* Management frames are sent to hostapd for processing */
- ieee80211_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status,
- ieee80211_msg_normal);
- }
- return TXRX_QUEUED;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_local *local = rx->local;
- struct sk_buff *skb = rx->skb;
-
- if (unlikely(local->sta_scanning != 0)) {
- ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status);
- return TXRX_QUEUED;
- }
-
- if (WLAN_FC_GET_TYPE(rx->fc) == WLAN_FC_TYPE_DATA)
- local->scan.txrx_count++;
- if (unlikely(local->scan.in_scan != 0 &&
- rx->u.rx.status->freq == local->scan.freq)) {
- struct ieee80211_hdr *hdr;
- u16 fc;
-
- local->scan.rx_packets++;
-
- hdr = (struct ieee80211_hdr *) skb->data;
- fc = le16_to_cpu(hdr->frame_control);
-
- if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
- WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON) {
- local->scan.rx_beacon++;
- /* Need to trim FCS here because it is normally
- * removed only after this passive scan handler. */
- if (rx->local->hw->rx_includes_fcs &&
- rx->skb->len > FCS_LEN)
- skb_trim(rx->skb, rx->skb->len - FCS_LEN);
-
- ieee80211_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status,
- ieee80211_msg_passive_scan);
- return TXRX_QUEUED;
- } else {
- I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
- return TXRX_DROP;
- }
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static 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 (WLAN_FC_GET_TYPE(fc)) {
- case WLAN_FC_TYPE_DATA:
- switch (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
- case WLAN_FC_TODS:
- return hdr->addr1;
- case (WLAN_FC_TODS | WLAN_FC_FROMDS):
- return NULL;
- case WLAN_FC_FROMDS:
- return hdr->addr2;
- case 0:
- return hdr->addr3;
- }
- break;
- case WLAN_FC_TYPE_MGMT:
- return hdr->addr3;
- case WLAN_FC_TYPE_CTRL:
- if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PSPOLL)
- return hdr->addr1;
- else
- return NULL;
- }
-
- return NULL;
-}
-
-
-static struct net_device * ieee80211_get_rx_dev(struct ieee80211_local *local,
- struct ieee80211_hdr *hdr,
- size_t len, int *sta_broadcast)
-{
- u8 *bssid;
- struct net_device *dev;
- u16 fc;
-
- bssid = ieee80211_get_bssid(hdr, len);
- if (bssid) {
- dev = ieee80211_own_bssid(local, bssid);
- if (!dev && (local->conf.mode == IW_MODE_INFRA ||
- local->conf.mode == IW_MODE_ADHOC))
- dev = ieee80211_sta_bssid(local, bssid, hdr->addr1,
- sta_broadcast);
- if (dev)
- return dev;
- }
-
- if (len >= 30) {
- fc = le16_to_cpu(hdr->frame_control);
- if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA &&
- (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
- (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
- dev = ieee80211_get_wds_dev(local, hdr->addr2);
- if (dev)
- return dev;
- }
- }
-
- /* Default to default device if nothing else matches */
- return local->wdev;
-}
-
-
-static void ieee80211_rx_michael_mic_report(struct net_device *dev,
- struct ieee80211_hdr *hdr,
- struct sta_info *sta,
- struct ieee80211_txrx_data *rx)
-{
- int keyidx, hdrlen;
-
- hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb);
- if (rx->skb->len >= hdrlen + 4)
- keyidx = rx->skb->data[hdrlen + 3] >> 6;
- else
- keyidx = -1;
-
- /* TODO: verify that this is not triggered by fragmented
- * frames (hw does not verify MIC for them). */
- printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
- "failure from " MACSTR " to " MACSTR " keyidx=%d\n",
- dev->name, MAC2STR(hdr->addr2), MAC2STR(hdr->addr1), keyidx);
-
- if (sta == NULL) {
- /* Some hardware versions seem to generate incorrect
- * Michael MIC reports; ignore them to avoid triggering
- * countermeasures. */
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for unknown address " MACSTR "\n",
- dev->name, MAC2STR(hdr->addr2));
- goto ignore;
- }
-
- if (!(rx->fc & WLAN_FC_ISWEP)) {
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for a frame with no ISWEP flag (src "
- MACSTR ")\n", dev->name, MAC2STR(hdr->addr2));
- goto ignore;
- }
-
- if (rx->local->hw->wep_include_iv &&
- rx->local->conf.mode == IW_MODE_MASTER) {
- int keyidx = ieee80211_wep_get_keyidx(rx->skb);
- /* AP with Pairwise keys support should never receive Michael
- * MIC errors for non-zero keyidx because these are reserved
- * for group keys and only the AP is sending real multicast
- * frames in BSS. */
- if (keyidx) {
- printk(KERN_DEBUG "%s: ignored Michael MIC error for "
- "a frame with non-zero keyidx (%d) (src " MACSTR
- ")\n", dev->name, keyidx, MAC2STR(hdr->addr2));
- goto ignore;
- }
- }
-
- if (WLAN_FC_GET_TYPE(rx->fc) != WLAN_FC_TYPE_DATA &&
- (WLAN_FC_GET_TYPE(rx->fc) != WLAN_FC_TYPE_MGMT ||
- WLAN_FC_GET_STYPE(rx->fc) != WLAN_FC_STYPE_AUTH)) {
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for a frame that cannot be encrypted "
- "(fc=0x%04x) (src " MACSTR ")\n",
- dev->name, rx->fc, MAC2STR(hdr->addr2));
- goto ignore;
- }
-
- do {
- union iwreq_data wrqu;
- char *buf = kmalloc(128, GFP_ATOMIC);
- if (buf == NULL)
- break;
-
- /* TODO: needed parameters: count, key type, TSC */
- sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
- "keyid=%d %scast addr=" MACSTR ")",
- keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
- MAC2STR(hdr->addr2));
- memset(&wrqu, 0, sizeof(wrqu));
- wrqu.data.length = strlen(buf);
- wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf);
- kfree(buf);
- } while (0);
-
- /* TODO: consider verifying the MIC error report with software
- * implementation if we get too many spurious reports from the
- * hardware. */
- ieee80211_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status,
- ieee80211_msg_michael_mic_failure);
- return;
-
- ignore:
- dev_kfree_skb(rx->skb);
- rx->skb = NULL;
-}
-
-
-static void ieee80211_sta_rx_broadcast(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_local *local = rx->dev->priv;
- u8 *_bssid, bssid[ETH_ALEN];
- struct sk_buff *orig_skb = rx->skb, *skb;
- struct ieee80211_hdr *hdr;
- ieee80211_rx_handler *handler;
- ieee80211_txrx_result res;
- struct list_head *ptr;
-
- hdr = (struct ieee80211_hdr *) orig_skb->data;
- _bssid = ieee80211_get_bssid(hdr, orig_skb->len);
- if (_bssid == NULL) {
- dev_kfree_skb(orig_skb);
- return;
- }
- memcpy(bssid, _bssid, ETH_ALEN);
-
- list_for_each(ptr, &local->sub_if_list) {
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
- if (sdata->type != IEEE80211_SUB_IF_TYPE_STA ||
- (memcmp(bssid, sdata->u.sta.bssid, ETH_ALEN) != 0 &&
- !(bssid[0] & 0x01)))
- continue;
-
- skb = skb_copy(orig_skb, GFP_ATOMIC);
- if (skb == NULL) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: failed to copy "
- "multicast frame for %s",
- rx->dev->name, sdata->dev->name);
- }
- continue;
- }
-
- hdr = (struct ieee80211_hdr *) skb->data;
- rx->skb = skb;
- rx->dev = sdata->dev;
- rx->sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
-
- res = TXRX_DROP;
- for (handler = local->rx_handlers; *handler != NULL; handler++)
- {
- res = (*handler)(rx);
- if (res == TXRX_DROP || res == TXRX_QUEUED)
- break;
- }
-
- if (res == TXRX_DROP || *handler == NULL)
- dev_kfree_skb(skb);
- }
-
- dev_kfree_skb(orig_skb);
-}
-
-
-/*
- * This is the receive path handler. It is called by a low level driver when an
- * 802.11 MPDU is received from the hardware.
- */
-void ieee80211_rx(struct net_device *dev, struct sk_buff *skb,
- struct ieee80211_rx_status *status)
-{
- struct ieee80211_local *local = dev->priv;
- struct sta_info *sta;
- struct ieee80211_hdr *hdr;
- ieee80211_rx_handler *handler;
- struct ieee80211_txrx_data rx;
- ieee80211_txrx_result res = TXRX_DROP;
- u16 type;
- int sta_broadcast = 0;
-
- hdr = (struct ieee80211_hdr *) skb->data;
- memset(&rx, 0, sizeof(rx));
- rx.skb = skb;
- rx.local = local;
- if (skb->len >= 16) {
- sta = rx.sta = sta_info_get(local, hdr->addr2);
- if (unlikely(sta == NULL &&
- local->conf.mode == IW_MODE_ADHOC)) {
- u8 *bssid = ieee80211_get_bssid(hdr, skb->len);
- if (bssid &&
- memcmp(bssid, local->bssid, ETH_ALEN) == 0)
- sta = rx.sta =
- ieee80211_ibss_add_sta(dev, skb, bssid,
- hdr->addr2);
- }
- } else
- sta = rx.sta = NULL;
- if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS))
- rx.dev = sta->dev;
- else
- rx.dev = ieee80211_get_rx_dev(local, hdr, skb->len,
- &sta_broadcast);
-
- rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
- rx.u.rx.status = status;
- rx.fc = skb->len >= 2 ? le16_to_cpu(hdr->frame_control) : 0;
- type = WLAN_FC_GET_TYPE(rx.fc);
- if (type == WLAN_FC_TYPE_DATA || type == WLAN_FC_TYPE_MGMT)
- local->dot11ReceivedFragmentCount++;
- if (sta_broadcast) {
- ieee80211_sta_rx_broadcast(&rx);
- goto end;
- }
-
- if ((status->flag & RX_FLAG_MMIC_ERROR)) {
- ieee80211_rx_michael_mic_report(dev, hdr, sta, &rx);
- goto end;
- }
-
- for (handler = local->rx_handlers; *handler != NULL; handler++) {
- res = (*handler)(&rx);
- if (res != TXRX_CONTINUE) {
- if (res == TXRX_DROP) {
- I802_DEBUG_INC(local->rx_handlers_drop);
- if (sta)
- sta->rx_dropped++;
- }
- if (res == TXRX_QUEUED)
- I802_DEBUG_INC(local->rx_handlers_queued);
- break;
- }
- }
-
- if (res == TXRX_DROP || *handler == NULL)
- dev_kfree_skb(skb);
-
- end:
- if (sta)
- sta_info_release(local, sta);
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_local *local = tx->local;
- struct sk_buff *skb = tx->skb;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u32 load = 0, hdrtime;
-
- /* TODO: this could be part of tx_status handling, so that the number
- * of retries would be known; TX rate should in that case be stored
- * somewhere with the packet */
-
- /* Estimate total channel use caused by this frame */
-
- /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
- * 1 usec = 1/8 * (1080 / 10) = 13.5 */
-
- if (local->conf.phymode == MODE_IEEE80211A ||
- local->conf.phymode == MODE_ATHEROS_TURBO ||
- local->conf.phymode == MODE_ATHEROS_TURBOG ||
- (local->conf.phymode == MODE_IEEE80211G &&
- tx->u.tx.rate->flags & IEEE80211_RATE_ERP))
- hdrtime = CHAN_UTIL_HDR_SHORT;
- else
- hdrtime = CHAN_UTIL_HDR_LONG;
-
- load = hdrtime;
- if (!MULTICAST_ADDR(hdr->addr1))
- load += hdrtime;
-
- if (tx->u.tx.control->use_rts_cts)
- load += 2 * hdrtime;
- else if (tx->u.tx.control->use_cts_protect)
- load += hdrtime;
-
- load += skb->len * tx->u.tx.rate->rate_inv;
-
- if (tx->u.tx.extra_frag) {
- int i;
- for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
- load += 2 * hdrtime;
- load += tx->u.tx.extra_frag[i]->len *
- tx->u.tx.rate->rate;
- }
- }
-
- /* Divide channel_use by 8 to avoid wrapping around the counter */
- load >>= CHAN_UTIL_SHIFT;
- local->channel_use_raw += load;
- if (tx->sta)
- tx->sta->channel_use_raw += load;
- tx->sdata->channel_use_raw += load;
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_local *local = rx->local;
- struct sk_buff *skb = rx->skb;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u32 load = 0, hdrtime;
- struct ieee80211_rate *rate;
- int i;
-
- /* Estimate total channel use caused by this frame */
-
- if (unlikely(local->num_curr_rates < 0))
- return TXRX_CONTINUE;
-
- rate = &local->curr_rates[0];
- for (i = 0; i < local->num_curr_rates; i++) {
- if (local->curr_rates[i].val == rx->u.rx.status->rate) {
- rate = &local->curr_rates[i];
- break;
- }
- }
-
- /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
- * 1 usec = 1/8 * (1080 / 10) = 13.5 */
-
- if (local->conf.phymode == MODE_IEEE80211A ||
- local->conf.phymode == MODE_ATHEROS_TURBO ||
- local->conf.phymode == MODE_ATHEROS_TURBOG ||
- (local->conf.phymode == MODE_IEEE80211G &&
- rate->flags & IEEE80211_RATE_ERP))
- hdrtime = CHAN_UTIL_HDR_SHORT;
- else
- hdrtime = CHAN_UTIL_HDR_LONG;
-
- load = hdrtime;
- if (!MULTICAST_ADDR(hdr->addr1))
- load += hdrtime;
-
- load += skb->len * rate->rate_inv;
-
- /* Divide channel_use by 8 to avoid wrapping around the counter */
- load >>= CHAN_UTIL_SHIFT;
- local->channel_use_raw += load;
- if (rx->sta)
- rx->sta->channel_use_raw += load;
- rx->sdata->channel_use_raw += load;
-
- return TXRX_CONTINUE;
-}
-
-
-static void ieee80211_stat_refresh(unsigned long data)
-{
- struct ieee80211_local *local = (struct ieee80211_local *) data;
- struct list_head *ptr, *n;
-
- if (!local->stat_time)
- return;
-
- /* go through all stations */
- spin_lock_bh(&local->sta_lock);
- list_for_each(ptr, &local->sta_list) {
- struct sta_info *sta =
- list_entry(ptr, struct sta_info, list);
- sta->channel_use = (sta->channel_use_raw / local->stat_time) /
- CHAN_UTIL_PER_10MS;
- sta->channel_use_raw = 0;
- }
- spin_unlock_bh(&local->sta_lock);
-
- /* go through all subinterfaces */
- list_for_each_safe(ptr, n, &local->sub_if_list) {
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
- sdata->channel_use = (sdata->channel_use_raw /
- local->stat_time) / CHAN_UTIL_PER_10MS;
- sdata->channel_use_raw = 0;
-
- }
-
- /* hardware interface */
- local->channel_use = (local->channel_use_raw /
- local->stat_time) / CHAN_UTIL_PER_10MS;
- local->channel_use_raw = 0;
-
- local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
- add_timer(&local->stat_timer);
-}
-
-
-/* This is a version of the rx handler that can be called from hard irq
- * context. Post the skb on the queue and schedule the tasklet */
-void ieee80211_rx_irqsafe(struct net_device *dev, struct sk_buff *skb,
- struct ieee80211_rx_status *status)
-{
- struct ieee80211_local *local = dev->priv;
-
- skb->dev = dev;
- memcpy(skb->cb, status, sizeof(struct ieee80211_rx_status));
- skb->pkt_type = ieee80211_rx_msg;
- skb_queue_tail(&local->skb_queue, skb);
- tasklet_schedule(&local->tasklet);
-}
-
-
-void ieee80211_tx_status_irqsafe(struct net_device *dev, struct sk_buff *skb,
- struct ieee80211_tx_status *status)
-{
- struct ieee80211_local *local = dev->priv;
- int tmp;
-
- if (status->tx_filtered || status->excessive_retries) {
- /* Need to save a copy of skb->cb somewhere. Storing it in the
- * end of the data might not be the most efficient way of doing
- * this (since it may require reallocation of packet data), but
- * should be good enough for now since tx_filtered or
- * excessive_retries should not be triggered that often. */
- if (skb_is_nonlinear(skb)) {
- if (skb_linearize(skb, GFP_ATOMIC)) {
- printk(KERN_DEBUG "%s: Failed to linearize "
- "skb\n", dev->name);
- dev_kfree_skb_irq(skb);
- return;
- }
- }
- if (skb_tailroom(skb) < sizeof(skb->cb) &&
- pskb_expand_head(skb, 0, sizeof(skb->cb), GFP_ATOMIC)) {
- printk(KERN_DEBUG "%s: Failed to store skb->cb "
- "in skb->data for TX filtered frame\n",
- dev->name);
- dev_kfree_skb_irq(skb);
- return;
- }
- memcpy(skb_put(skb, sizeof(skb->cb)), skb->cb,
- sizeof(skb->cb));
- }
-
- skb->dev = dev;
- memcpy(skb->cb, status, sizeof(struct ieee80211_tx_status));
- skb->pkt_type = ieee80211_tx_status_msg;
- skb_queue_tail(status->req_tx_status ?
- &local->skb_queue : &local->skb_queue_unreliable, skb);
- tmp = skb_queue_len(&local->skb_queue) +
- skb_queue_len(&local->skb_queue_unreliable);
- while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
- (skb = skb_dequeue(&local->skb_queue_unreliable))) {
- dev_kfree_skb_irq(skb);
- tmp--;
- I802_DEBUG_INC(local->tx_status_drop);
- }
- tasklet_schedule(&local->tasklet);
-}
-
-
-static void ieee80211_tasklet_handler(unsigned long data)
-{
- struct ieee80211_local *local = (struct ieee80211_local *) data;
- struct sk_buff *skb;
- struct ieee80211_rx_status rx_status;
- struct ieee80211_tx_status tx_status;
-
- while ((skb = skb_dequeue(&local->skb_queue)) ||
- (skb = skb_dequeue(&local->skb_queue_unreliable))) {
- switch (skb->pkt_type) {
- case ieee80211_rx_msg:
- /* Make a copy of the RX status because the original
- * skb may be freed during processing. Clear skb->type
- * in order to not confuse kernel netstack. */
- memcpy(&rx_status, skb->cb, sizeof(rx_status));
- skb->pkt_type = 0;
- ieee80211_rx(skb->dev, skb, &rx_status);
- break;
- case ieee80211_tx_status_msg:
- /* Make a copy of the TX status because the original
- * skb may be freed during processing. */
- memcpy(&tx_status, skb->cb, sizeof(tx_status));
- skb->pkt_type = 0;
- if ((tx_status.tx_filtered ||
- tx_status.excessive_retries) &&
- skb->len >= sizeof(skb->cb)) {
- /* Restore skb->cb from the copy that was made
- * in ieee80211_tx_status_irqsafe() */
- memcpy(skb->cb,
- skb->data + skb->len - sizeof(skb->cb),
- sizeof(skb->cb));
- skb_trim(skb, skb->len - sizeof(skb->cb));
- }
- ieee80211_tx_status(skb->dev, skb, &tx_status);
- break;
- default: /* should never get here! */
- printk(KERN_ERR "%s: Unknown message type (%d)\n",
- local->wdev->name, skb->pkt_type);
- dev_kfree_skb(skb);
- break;
- }
- }
-}
-
-
-/* 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
- * new IEEE 802.11 frame that is ready to go through TX processing again. */
-static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
- struct ieee80211_key *key,
- struct sk_buff *skb)
-{
- int hdrlen, iv_len, mic_len;
-
- if (key == NULL)
- return;
-
- hdrlen = ieee80211_get_hdrlen_from_skb(skb);
-
- switch (key->alg) {
- case ALG_WEP:
- iv_len = WEP_IV_LEN;
- mic_len = WEP_ICV_LEN;
- break;
- case ALG_TKIP:
- iv_len = TKIP_IV_LEN;
- mic_len = TKIP_ICV_LEN;
- break;
- case ALG_CCMP:
- iv_len = CCMP_HDR_LEN;
- mic_len = CCMP_MIC_LEN;
- break;
- default:
- return;
- }
-
- if (skb->len >= mic_len && key->force_sw_encrypt)
- skb_trim(skb, skb->len - mic_len);
- if (skb->len >= iv_len && skb->len > hdrlen) {
- memmove(skb->data + iv_len, skb->data, hdrlen);
- skb_pull(skb, iv_len);
- }
-
- {
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc = le16_to_cpu(hdr->frame_control);
- if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
- fc &= ~(WLAN_FC_STYPE_QOS_DATA << 4);
- hdr->frame_control = cpu_to_le16(fc);
- memmove(skb->data + 2, skb->data, hdrlen - 2);
- skb_pull(skb, 2);
- }
- }
-}
-
-
-void ieee80211_tx_status(struct net_device *dev, struct sk_buff *skb,
- struct ieee80211_tx_status *status)
-{
- struct sk_buff *skb2;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct ieee80211_local *local = dev->priv;
- struct ieee80211_tx_packet_data *pkt_data =
- (struct ieee80211_tx_packet_data *) skb->cb;
- u16 frag, type;
- u32 msg_type;
-
- if (!status) {
- printk(KERN_ERR
- "%s: ieee80211_tx_status called with NULL status\n",
- dev->name);
- dev_kfree_skb(skb);
- return;
- }
-
- if (status->excessive_retries) {
- struct sta_info *sta;
-
-
- sta = sta_info_get(local, hdr->addr1);
- if (sta) {
- if (sta->flags & WLAN_STA_PS) {
- /* The STA is in power save mode, so assume
- * that this TX packet failed because of that.
- */
- status->excessive_retries = 0;
- status->tx_filtered = 1;
- }
- sta_info_release(local, sta);
- }
- }
-
- if (status->tx_filtered) {
- struct sta_info *sta;
- sta = sta_info_get(local, hdr->addr1);
- if (sta) {
-
- sta->tx_filtered_count++;
-
- /* Clear the TX filter mask for this STA when sending
- * the next packet. If the STA went to power save mode,
- * this will happen when it is waking up for the next
- * time. */
- sta->clear_dst_mask = 1;
-
- /* TODO: Is the WLAN_STA_PS flag always set here or is
- * the race between RX and TX status causing some
- * packets to be filtered out before 80211.o gets an
- * update for PS status? This seems to be the case, so
- * no changes are likely to be needed. */
- if (sta->flags & WLAN_STA_PS &&
- skb_queue_len(&sta->tx_filtered) <
- STA_MAX_TX_BUFFER) {
- ieee80211_remove_tx_extra(local, sta->key,
- skb);
- skb_queue_tail(&sta->tx_filtered, skb);
- } else if (!(sta->flags & WLAN_STA_PS) &&
- !pkt_data->control.requeue) {
- /* Software retry the packet once */
- pkt_data->control.requeue = 1;
- ieee80211_remove_tx_extra(local, sta->key,
- skb);
- dev_queue_xmit(skb);
- } else {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: dropped TX "
- "filtered frame queue_len=%d "
- "PS=%d @%lu\n",
- dev->name,
- skb_queue_len(
- &sta->tx_filtered),
- !!(sta->flags & WLAN_STA_PS),
- jiffies);
- }
- dev_kfree_skb(skb);
- }
- sta_info_release(local, sta);
- return;
- }
- } else {
- rate_control_tx_status(dev, skb, status);
- }
-
-#ifdef IEEE80211_LEDS
- if (local->tx_led_counter && (local->tx_led_counter-- == 1)) {
- ieee80211_tx_led(0, dev);
- }
-#endif /* IEEE80211_LEDS */
- /* SNMP counters
- * Fragments are passed to low-level drivers as separate skbs, so these
- * are actually fragments, not frames. Update frame counters only for
- * the first fragment of the frame. */
-
- frag = WLAN_GET_SEQ_FRAG(le16_to_cpu(hdr->seq_ctrl));
- type = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_control));
-
- if (status->ack) {
- if (frag == 0) {
- local->dot11TransmittedFrameCount++;
- if (MULTICAST_ADDR(hdr->addr1))
- local->dot11MulticastTransmittedFrameCount++;
- if (status->retry_count > 0)
- local->dot11RetryCount++;
- if (status->retry_count > 1)
- local->dot11MultipleRetryCount++;
- }
-
- /* This counter shall be incremented for an acknowledged MPDU
- * with an individual address in the address 1 field or an MPDU
- * with a multicast address in the address 1 field of type Data
- * or Management. */
- if (!MULTICAST_ADDR(hdr->addr1) || type == WLAN_FC_TYPE_DATA ||
- type == WLAN_FC_TYPE_MGMT)
- local->dot11TransmittedFragmentCount++;
- } else {
- if (frag == 0)
- local->dot11FailedCount++;
- }
-
- if (!status->req_tx_status) {
- dev_kfree_skb(skb);
- return;
- }
-
- msg_type = status->ack ? ieee80211_msg_tx_callback_ack :
- ieee80211_msg_tx_callback_fail;
-
- /* skb was the original skb used for TX. Clone it and give the clone
- * to netif_rx(). Free original skb. */
- skb2 = skb_copy(skb, GFP_ATOMIC);
- if (!skb2) {
- dev_kfree_skb(skb);
- return;
- }
- dev_kfree_skb(skb);
- skb = skb2;
-
- /* Send frame to hostapd */
- ieee80211_rx_mgmt(dev, skb, NULL, msg_type);
-}
-
-
-/* TODO: implement register/unregister functions for adding TX/RX handlers
- * into ordered list */
-
-static ieee80211_rx_handler ieee80211_rx_handlers[] =
-{
- ieee80211_rx_h_parse_qos,
- ieee80211_rx_h_load_stats,
- ieee80211_rx_h_monitor,
- ieee80211_rx_h_passive_scan,
- ieee80211_rx_h_check,
- ieee80211_rx_h_sta_process,
- ieee80211_rx_h_ccmp_decrypt,
- ieee80211_rx_h_tkip_decrypt,
- ieee80211_rx_h_wep_weak_iv_detection,
- ieee80211_rx_h_wep_decrypt,
- ieee80211_rx_h_defragment,
- ieee80211_rx_h_ieee80211_rx_h_ps_poll,
- ieee80211_rx_h_michael_mic_verify,
- /* this must be after decryption - so header is counted in MPDU mic
- * must be before pae and data, so QOS_DATA format frames
- * are not passed to user space by these functions
- */
- ieee80211_rx_h_remove_qos_control,
- ieee80211_rx_h_802_1x_pae,
- ieee80211_rx_h_drop_unencrypted,
- ieee80211_rx_h_data,
- ieee80211_rx_h_mgmt,
- NULL
-};
-
-static ieee80211_tx_handler ieee80211_tx_handlers[] =
-{
- ieee80211_tx_h_rate_limit,
- ieee80211_tx_h_check_assoc,
- ieee80211_tx_h_ps_buf,
- ieee80211_tx_h_select_key,
- ieee80211_tx_h_michael_mic_add,
- ieee80211_tx_h_fragment,
- ieee80211_tx_h_tkip_encrypt,
- ieee80211_tx_h_ccmp_encrypt,
- ieee80211_tx_h_wep_encrypt,
- ieee80211_tx_h_rate_ctrl,
- ieee80211_tx_h_misc,
- ieee80211_tx_h_load_stats,
- NULL
-};
-
-
-static void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata)
-{
- /* Default values for sub-interface parameters */
- sdata->drop_unencrypted = 0;
- sdata->eapol = 1;
-}
-
-
-static struct net_device *ieee80211_if_add(struct net_device *dev,
- char *name, int locked)
-{
- struct net_device *wds_dev = NULL, *tmp_dev;
- struct ieee80211_local *local = dev->priv;
- struct ieee80211_sub_if_data *sdata = NULL, *sdata_parent;
- int alloc_size;
- int ret;
- int i;
-
- /* ensure 32-bit alignment of our private data and hw private data */
- alloc_size = sizeof(struct net_device) + 3 +
- sizeof(struct ieee80211_sub_if_data) + 3;
-
- wds_dev = (struct net_device *) kmalloc(alloc_size, GFP_KERNEL);
- if (wds_dev == NULL)
- return NULL;
-
- memset(wds_dev, 0, alloc_size);
- wds_dev->priv = local;
- ether_setup(wds_dev);
- if (strlen(name) == 0) {
- i = 0;
- do {
- sprintf(wds_dev->name, "%s.%d", dev->name, i++);
- tmp_dev = dev_get_by_name(wds_dev->name);
- if (tmp_dev == NULL)
- break;
- dev_put(tmp_dev);
- } while (i < 10000);
- } else {
- snprintf(wds_dev->name, IFNAMSIZ, "%s", name);
- }
-
- memcpy(wds_dev->dev_addr, dev->dev_addr, ETH_ALEN);
- wds_dev->hard_start_xmit = ieee80211_subif_start_xmit;
- wds_dev->do_ioctl = ieee80211_ioctl;
- wds_dev->change_mtu = ieee80211_change_mtu;
- wds_dev->tx_timeout = ieee80211_tx_timeout;
- wds_dev->get_stats = ieee80211_get_stats;
- wds_dev->open = ieee80211_open;
- wds_dev->stop = ieee80211_stop;
- wds_dev->base_addr = dev->base_addr;
- wds_dev->irq = dev->irq;
- wds_dev->mem_start = dev->mem_start;
- wds_dev->mem_end = dev->mem_end;
- wds_dev->tx_queue_len = 0;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(wds_dev);
- sdata->type = IEEE80211_SUB_IF_TYPE_NORM;
- sdata->master = local->mdev;
- sdata->dev = wds_dev;
- sdata->local = local;
- memset(&sdata->stats, 0, sizeof(struct net_device_stats));
- sdata_parent = IEEE80211_DEV_TO_SUB_IF(dev);
- if (sdata_parent->type == IEEE80211_SUB_IF_TYPE_NORM)
- sdata->bss = &sdata_parent->u.norm;
- else {
- printk(KERN_DEBUG "%s: could not set BSS pointer for new "
- "interface %s\n", dev->name, wds_dev->name);
- }
- ieee80211_if_sdata_init(sdata);
-
- if (locked)
- ret = register_netdevice(wds_dev);
- else
- ret = register_netdev(wds_dev);
- if (ret) {
- kfree(wds_dev);
- return NULL;
- }
-
- list_add(&sdata->list, &local->sub_if_list);
-
- strcpy(name, wds_dev->name);
-
- return wds_dev;
-}
-
-
-int ieee80211_if_add_wds(struct net_device *dev, char *name,
- struct ieee80211_if_wds *wds, int locked)
-{
- struct net_device *wds_dev = NULL;
- struct ieee80211_sub_if_data *sdata = NULL;
-
- if (strlen(name) != 0) {
- wds_dev = dev_get_by_name(name);
- if (wds_dev) {
- dev_put(wds_dev);
- return -EEXIST;
- }
- }
-
- wds_dev = ieee80211_if_add(dev, name, locked);
- if (wds_dev == NULL)
- return -ENOANO;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(wds_dev);
- sdata->type = IEEE80211_SUB_IF_TYPE_WDS;
- memcpy(&sdata->u.wds, wds, sizeof(struct ieee80211_if_wds));
-
-#ifdef CONFIG_IEEE80211_VERBOSE_DEBUG
- printk(KERN_DEBUG
- "%s: Added WDS Link to " MACSTR "\n",
- wds_dev->name, MAC2STR(sdata->u.wds.remote_addr));
-#endif /* CONFIG_IEEE80211_VERBOSE_DEBUG */
-
-
- ieee80211_proc_init_virtual(wds_dev);
-
- return 0;
-}
-
-
-int ieee80211_if_update_wds(struct net_device *dev, char *name,
- struct ieee80211_if_wds *wds, int locked)
-{
- struct net_device *wds_dev = NULL;
- struct ieee80211_local *local = dev->priv;
- struct ieee80211_sub_if_data *sdata = NULL;
- struct sta_info *sta;
- struct list_head *ptr;
-
- list_for_each(ptr, &local->sub_if_list) {
- sdata = list_entry(ptr, struct ieee80211_sub_if_data, list);
- if (strcmp(name, sdata->dev->name) == 0) {
- wds_dev = sdata->dev;
- break;
- }
- }
-
- if (wds_dev == NULL || sdata->type != IEEE80211_SUB_IF_TYPE_WDS)
- return -ENODEV;
-
- /* Remove STA entry for the old peer */
- sta = sta_info_get(local, sdata->u.wds.remote_addr);
- if (sta) {
- sta_info_release(local, sta);
- sta_info_free(local, sta, 0);
- } else {
- printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
- "%s peer " MACSTR "\n",
- dev->name, wds_dev->name,
- MAC2STR(sdata->u.wds.remote_addr));
- }
-
- /* Update WDS link data */
- memcpy(&sdata->u.wds, wds, sizeof(struct ieee80211_if_wds));
-
-
- return 0;
-}
-
-
-static void ieee80211_if_init(struct net_device *dev)
-{
- struct ieee80211_local *local = dev->priv;
-
- spin_lock_init(&local->sub_if_lock);
- INIT_LIST_HEAD(&local->sub_if_list);
-
-}
-
-
-int ieee80211_if_add_vlan(struct net_device *dev,
- char *name,
- struct ieee80211_if_vlan *vlan,
- int locked)
-{
- struct net_device *vlan_dev = NULL;
- struct ieee80211_sub_if_data *sdata = NULL;
-
- if (strlen(name) != 0) {
- vlan_dev = dev_get_by_name(name);
- if (vlan_dev) {
- dev_put(vlan_dev);
- return -EEXIST;
- }
- }
-
- vlan_dev = ieee80211_if_add(dev, name, locked);
- if (vlan_dev == NULL)
- return -ENOANO;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(vlan_dev);
- sdata->type = IEEE80211_SUB_IF_TYPE_VLAN;
- ieee80211_proc_init_virtual(vlan_dev);
- return 0;
-}
-
-
-static void ieee80211_if_norm_init(struct ieee80211_sub_if_data *sdata)
-{
- sdata->type = IEEE80211_SUB_IF_TYPE_NORM;
- sdata->u.norm.dtim_period = 2;
- sdata->u.norm.force_unicast_rateidx = -1;
- sdata->u.norm.max_ratectrl_rateidx = -1;
- skb_queue_head_init(&sdata->u.norm.ps_bc_buf);
- sdata->bss = &sdata->u.norm;
-}
-
-
-int ieee80211_if_add_norm(struct net_device *dev, char *name, u8 *bssid,
- int locked)
-{
- struct ieee80211_local *local = dev->priv;
- struct net_device *norm_dev = NULL;
- struct ieee80211_sub_if_data *sdata = NULL;
-
- if (local->bss_dev_count >= local->conf.bss_count)
- return -ENOBUFS;
-
- if (strlen(name) != 0) {
- norm_dev = dev_get_by_name(name);
- if (norm_dev) {
- dev_put(norm_dev);
- return -EEXIST;
- }
- }
-
- norm_dev = ieee80211_if_add(dev, name, locked);
- if (norm_dev == NULL)
- return -ENOANO;
-
- memcpy(norm_dev->dev_addr, bssid, ETH_ALEN);
- sdata = IEEE80211_DEV_TO_SUB_IF(norm_dev);
- ieee80211_if_norm_init(sdata);
- ieee80211_proc_init_virtual(norm_dev);
- spin_lock_bh(&local->sub_if_lock);
- local->bss_devs[local->bss_dev_count] = norm_dev;
- local->bss_dev_count++;
- spin_unlock_bh(&local->sub_if_lock);
-
- return 0;
-}
-
-
-static void ieee80211_addr_inc(u8 *addr)
-{
- int pos = 5;
- while (pos >= 0) {
- addr[pos]++;
- if (addr[pos] != 0)
- break;
- pos--;
- }
-}
-
-
-int ieee80211_if_add_sta(struct net_device *dev, char *name, int locked)
-{
- struct ieee80211_local *local = dev->priv;
- struct net_device *sta_dev;
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_if_sta *ifsta;
- int i;
-
- if (local->sta_dev_count >= local->conf.bss_count)
- return -ENOBUFS;
-
- if (strlen(name) != 0) {
- sta_dev = dev_get_by_name(name);
- if (sta_dev) {
- dev_put(sta_dev);
- return -EEXIST;
- }
- }
-
- sta_dev = ieee80211_if_add(dev, name, locked);
- if (sta_dev == NULL)
- return -ENOANO;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(sta_dev);
- ifsta = &sdata->u.sta;
- sdata->type = IEEE80211_SUB_IF_TYPE_STA;
- ieee80211_proc_init_virtual(sta_dev);
-
- spin_lock_bh(&local->sub_if_lock);
- for (i = 0; i < local->conf.bss_count; i++) {
- if (local->sta_devs[i] == NULL) {
- local->sta_devs[i] = sta_dev;
- local->sta_dev_count++;
- printk(KERN_DEBUG "%s: using STA entry %d\n",
- sta_dev->name, i);
- while (i > 0) {
- ieee80211_addr_inc(sta_dev->dev_addr);
- i--;
- }
- printk(KERN_DEBUG "%s: MAC address " MACSTR "\n",
- sta_dev->name, MAC2STR(sta_dev->dev_addr));
- break;
- }
- }
- spin_unlock_bh(&local->sub_if_lock);
-
- init_timer(&ifsta->timer);
- ifsta->timer.data = (unsigned long) sta_dev;
- ifsta->timer.function = ieee80211_sta_timer;
-
- ifsta->capab = WLAN_CAPABILITY_ESS;
- ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
- IEEE80211_AUTH_ALG_SHARED_KEY;
- ifsta->create_ibss = 1;
- ifsta->wmm_enabled = 1;
-
- return 0;
-}
-
-
-static void ieee80211_if_del(struct ieee80211_local *local,
- struct ieee80211_sub_if_data *sdata, int locked)
-{
- struct sta_info *sta;
- u8 addr[ETH_ALEN];
- int i, j;
- struct list_head *ptr, *n;
-
- memset(addr, 0xff, ETH_ALEN);
- for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
- if (!sdata->keys[i])
- continue;
-#if 0
- /* Low-level driver has probably disabled hw
- * already, so there is not really much point
- * in disabling the keys at this point. */
- if (local->hw->set_key)
- local->hw->set_key(dev, DISABLE_KEY, addr,
- local->keys[i], 0);
-#endif
- kfree(sdata->keys[i]);
- }
-
- switch (sdata->type) {
- case IEEE80211_SUB_IF_TYPE_NORM:
- /* Remove all virtual interfaces that use this BSS
- * as their sdata->bss */
- list_for_each_safe(ptr, n, &local->sub_if_list) {
- struct ieee80211_sub_if_data *tsdata =
- list_entry(ptr, struct ieee80211_sub_if_data,
- list);
-
- if (tsdata != sdata && tsdata->bss == &sdata->u.norm) {
- printk(KERN_DEBUG "%s: removing virtual "
- "interface %s because its BSS interface"
- " is being removed\n",
- sdata->dev->name, tsdata->dev->name);
- ieee80211_if_del(local, tsdata, locked);
- }
- }
-
- kfree(sdata->u.norm.beacon_head);
- kfree(sdata->u.norm.beacon_tail);
- spin_lock_bh(&local->sub_if_lock);
- for (j = 0; j < local->bss_dev_count; j++) {
- if (sdata->dev == local->bss_devs[j]) {
- if (j + 1 < local->bss_dev_count) {
- memcpy(&local->bss_devs[j],
- &local->bss_devs[j + 1],
- (local->bss_dev_count - j - 1) *
- sizeof(local->bss_devs[0]));
- local->bss_devs[local->bss_dev_count -
- 1] = NULL;
- } else
- local->bss_devs[j] = NULL;
- local->bss_dev_count--;
- break;
- }
- }
- spin_unlock_bh(&local->sub_if_lock);
-
- if (sdata->dev != local->mdev) {
- struct sk_buff *skb;
- while ((skb = skb_dequeue(&sdata->u.norm.ps_bc_buf))) {
- local->total_ps_buffered--;
- dev_kfree_skb(skb);
- }
- }
-
- break;
- case IEEE80211_SUB_IF_TYPE_WDS:
- sta = sta_info_get(local, sdata->u.wds.remote_addr);
- if (sta) {
- sta_info_release(local, sta);
- sta_info_free(local, sta, 0);
- } else {
-#ifdef CONFIG_IEEE80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: Someone had deleted my STA "
- "entry for the WDS link\n", sdata->dev->name);
-#endif /* CONFIG_IEEE80211_VERBOSE_DEBUG */
- }
- break;
- case IEEE80211_SUB_IF_TYPE_STA:
- del_timer_sync(&sdata->u.sta.timer);
- if (local->scan_timer.data == (unsigned long) sdata->dev)
- del_timer_sync(&local->scan_timer);
- kfree(sdata->u.sta.extra_ie);
- sdata->u.sta.extra_ie = NULL;
- kfree(sdata->u.sta.assocreq_ies);
- sdata->u.sta.assocreq_ies = NULL;
- kfree(sdata->u.sta.assocresp_ies);
- sdata->u.sta.assocresp_ies = NULL;
- if (sdata->u.sta.probe_resp) {
- dev_kfree_skb(sdata->u.sta.probe_resp);
- sdata->u.sta.probe_resp = NULL;
- }
- for (i = 0; i < local->conf.bss_count; i++) {
- if (local->sta_devs[i] == sdata->dev) {
- local->sta_devs[i] = NULL;
- local->sta_dev_count--;
- break;
- }
- }
-
- break;
- }
-
- /* remove all STAs that are bound to this virtual interface */
- sta_info_flush(local, sdata->dev);
-
- list_del(&sdata->list);
- ieee80211_proc_deinit_virtual(sdata->dev);
- if (locked)
- unregister_netdevice(sdata->dev);
- else
- unregister_netdev(sdata->dev);
- /* Default data device and management device are allocated with the
- * master device. All other devices are separately allocated and will
- * be freed here. */
- if (sdata->dev != local->mdev && sdata->dev != local->wdev &&
- sdata->dev != local->apdev)
- kfree(sdata->dev);
-}
-
-
-static int ieee80211_if_remove(struct net_device *dev, char *name, int id,
- int locked)
-{
- struct ieee80211_local *local = dev->priv;
- struct list_head *ptr, *n;
-
- /* Make sure not to touch sdata->master since it may
- * have already been deleted, etc. */
-
- list_for_each_safe(ptr, n, &local->sub_if_list) {
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
-
- if (sdata->type == id && strcmp(name, sdata->dev->name) == 0) {
- ieee80211_if_del(local, sdata, locked);
- break;
- }
- }
-
- return 0;
-}
-
-
-int ieee80211_if_remove_wds(struct net_device *dev, char *name, int locked)
-{
- return ieee80211_if_remove(dev, name, IEEE80211_SUB_IF_TYPE_WDS,
- locked);
-}
-
-
-int ieee80211_if_remove_vlan(struct net_device *dev, char *name, int locked)
-{
- return ieee80211_if_remove(dev, name, IEEE80211_SUB_IF_TYPE_VLAN,
- locked);
-}
-
-
-int ieee80211_if_remove_norm(struct net_device *dev, char *name, int locked)
-{
- return ieee80211_if_remove(dev, name, IEEE80211_SUB_IF_TYPE_NORM,
- locked);
-}
-
-
-int ieee80211_if_remove_sta(struct net_device *dev, char *name, int locked)
-{
- return ieee80211_if_remove(dev, name, IEEE80211_SUB_IF_TYPE_STA,
- locked);
-}
-
-
-int ieee80211_if_flush(struct net_device *dev, int locked)
-{
- struct ieee80211_local *local = dev->priv;
- struct list_head *ptr, *n;
-
- list_for_each_safe(ptr, n, &local->sub_if_list) {
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
-
- if (sdata->dev != local->mdev &&
- sdata->dev != local->wdev &&
- sdata->dev != local->apdev)
- ieee80211_if_del(local, sdata, locked);
- }
-
- return 0;
-}
-
-
-static void ieee80211_precalc_rates(struct ieee80211_hw *hw)
-{
- struct ieee80211_hw_modes *mode;
- struct ieee80211_rate *rate;
- int m, r;
-
- for (m = 0; m < hw->num_modes; m++) {
- mode = &hw->modes[m];
- for (r = 0; r < mode->num_rates; r++) {
- rate = &mode->rates[r];
- rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
- }
- }
-}
-
-
-struct net_device *ieee80211_alloc_hw(size_t priv_data_len,
- void (*setup)(struct net_device *))
-{
- struct net_device *dev, *apdev, *mdev;
- struct ieee80211_local *local;
- struct ieee80211_sub_if_data *sdata;
- int alloc_size;
-
- /* Ensure 32-bit alignment of our private data and hw private data.
- * Each net_device is followed by a sub_if_data which which is used
- * for wds/vlan information; it is aligned as well.
- *
- * Sample memory map looks something like:
- *
- * 0000 *****************
- * * net_dev *
- * 015c *****************
- * * sub_if *
- * 017c *****************
- * * local *
- * 0b84 *****************
- * * hw_priv *
- * 1664 *****************
- * * ap net_dev *
- * 17c0 *****************
- * * sub_if *
- * *****************
- * * master net_dev*
- * *****************
- * * sub_if *
- * *****************
- */
- alloc_size = sizeof(struct net_device) +
- sizeof(struct ieee80211_sub_if_data) + 3 +
- sizeof(struct ieee80211_local) + 3 +
- priv_data_len + 3 +
- sizeof(struct net_device) + 3 +
- sizeof(struct ieee80211_sub_if_data) + 3 +
- sizeof(struct net_device) + 3 +
- sizeof(struct ieee80211_sub_if_data) + 3 +
- 4096;
- mdev = (struct net_device *) kzalloc(alloc_size, GFP_KERNEL);
- if (mdev == NULL)
- return NULL;
-
- mdev->priv = (struct net_device *)
- (((long) mdev +
- sizeof(struct net_device) +
- sizeof(struct ieee80211_sub_if_data) + 3)
- & ~3);
- local = mdev->priv;
- local->hw_priv = (void *)
- (((long) local + sizeof(struct ieee80211_local) + 3) & ~3);
- apdev = (struct net_device *)
- (((long) local->hw_priv + priv_data_len + 3) & ~3);
- dev = (struct net_device *)
- (((long) apdev +
- sizeof(struct net_device) +
- sizeof(struct ieee80211_sub_if_data) + 3)
- & ~3);
- dev->priv = local;
-
- ether_setup(dev);
- memcpy(dev->name, "wlan%d", 7);
-
- dev->hard_start_xmit = ieee80211_subif_start_xmit;
- dev->do_ioctl = ieee80211_ioctl;
- dev->change_mtu = ieee80211_change_mtu;
- dev->tx_timeout = ieee80211_tx_timeout;
- dev->get_stats = ieee80211_get_stats;
- dev->open = ieee80211_open;
- dev->stop = ieee80211_stop;
- dev->tx_queue_len = 0;
- dev->set_mac_address = ieee80211_set_mac_address;
-
- local->wdev = dev;
- local->mdev = mdev;
- local->rx_handlers = ieee80211_rx_handlers;
- local->tx_handlers = ieee80211_tx_handlers;
-
- local->bridge_packets = 1;
-
- local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
- local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
- local->short_retry_limit = 7;
- local->long_retry_limit = 4;
- local->conf.calib_int = 60;
- local->rate_ctrl_num_up = RATE_CONTROL_NUM_UP;
- local->rate_ctrl_num_down = RATE_CONTROL_NUM_DOWN;
- local->conf.bss_count = 1;
- memset(local->conf.bssid_mask, 0xff, ETH_ALEN);
- local->bss_devs = kmalloc(sizeof(struct net_device *), GFP_KERNEL);
- if (local->bss_devs == NULL)
- goto fail;
- local->bss_devs[0] = local->wdev;
- local->bss_dev_count = 1;
- local->sta_devs = kmalloc(sizeof(struct net_device *), GFP_KERNEL);
- if (local->sta_devs == NULL)
- goto fail;
- local->sta_devs[0] = NULL;
-
- local->scan.in_scan = 0;
- local->hw_modes = (unsigned int) -1;
-
- init_timer(&local->scan.timer); /* clear it out */
-
- spin_lock_init(&local->generic_lock);
- init_timer(&local->rate_limit_timer);
- local->rate_limit_timer.function = ieee80211_rate_limit;
- local->rate_limit_timer.data = (unsigned long) local;
- init_timer(&local->stat_timer);
- local->stat_timer.function = ieee80211_stat_refresh;
- local->stat_timer.data = (unsigned long) local;
- ieee80211_rx_bss_list_init(dev);
-
- sta_info_init(local);
-
- ieee80211_if_init(dev);
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- sdata->dev = dev;
- sdata->master = mdev;
- sdata->local = local;
- ieee80211_if_sdata_init(sdata);
- ieee80211_if_norm_init(sdata);
- list_add_tail(&sdata->list, &local->sub_if_list);
-
- if (strlen(dev->name) + 2 >= sizeof(dev->name))
- goto fail;
-
- apdev = (struct net_device *)
- (((long) local->hw_priv + priv_data_len + 3) & ~3);
- local->apdev = apdev;
- ether_setup(apdev);
- apdev->priv = local;
- apdev->hard_start_xmit = ieee80211_mgmt_start_xmit;
- apdev->change_mtu = ieee80211_change_mtu_apdev;
- apdev->get_stats = ieee80211_get_stats;
- apdev->open = ieee80211_open;
- apdev->stop = ieee80211_stop;
- apdev->type = ARPHRD_IEEE80211_PRISM;
- apdev->hard_header_parse = header_parse_80211;
- apdev->tx_queue_len = 0;
- sprintf(apdev->name, "%sap", dev->name);
-
- sdata = IEEE80211_DEV_TO_SUB_IF(apdev);
- sdata->type = IEEE80211_SUB_IF_TYPE_MGMT;
- sdata->dev = apdev;
- sdata->master = mdev;
- sdata->local = local;
- list_add_tail(&sdata->list, &local->sub_if_list);
-
- ether_setup(mdev);
- mdev->hard_start_xmit = ieee80211_master_start_xmit;
- mdev->do_ioctl = ieee80211_ioctl;
- mdev->change_mtu = ieee80211_change_mtu;
- mdev->tx_timeout = ieee80211_tx_timeout;
- mdev->get_stats = ieee80211_get_stats;
- mdev->open = ieee80211_open;
- mdev->stop = ieee80211_stop;
- mdev->type = ARPHRD_IEEE80211;
- mdev->hard_header_parse = header_parse_80211;
- sprintf(mdev->name, "%s.11", dev->name);
-
- sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
- sdata->type = IEEE80211_SUB_IF_TYPE_NORM;
- sdata->dev = mdev;
- sdata->master = mdev;
- sdata->local = local;
- list_add_tail(&sdata->list, &local->sub_if_list);
-
- tasklet_init(&local->tasklet,
- ieee80211_tasklet_handler,
- (unsigned long) local);
- skb_queue_head_init(&local->skb_queue);
- skb_queue_head_init(&local->skb_queue_unreliable);
-
- if (setup)
- setup(mdev);
-
- return mdev;
-
- fail:
- ieee80211_free_hw(mdev);
- return NULL;
-}
-
-int ieee80211_register_hw(struct net_device *dev, struct ieee80211_hw *hw)
-{
- struct ieee80211_local *local = dev->priv;
- int result;
-
- if (!hw)
- return -1;
-
- if (hw->version != IEEE80211_VERSION) {
- printk("ieee80211_register_hw - version mismatch: 80211.o "
- "version %d, low-level driver version %d\n",
- IEEE80211_VERSION, hw->version);
- return -1;
- }
-
- local->conf.mode = IW_MODE_MASTER;
- local->conf.beacon_int = 1000;
-
- ieee80211_update_hw(dev, hw); /* Don't care about the result. */
-
- sta_info_start(local);
-
- result = register_netdev(local->wdev);
- if (result < 0)
- return -1;
-
- result = register_netdev(local->apdev);
- if (result < 0)
- goto fail_2nd_dev;
-
- if (hw->fraglist)
- dev->features |= NETIF_F_FRAGLIST;
- result = register_netdev(dev);
- if (result < 0)
- goto fail_3rd_dev;
-
- if (rate_control_initialize(local) < 0) {
- printk(KERN_DEBUG "%s: Failed to initialize rate control "
- "algorithm\n", dev->name);
- goto fail_rate;
- }
-
- /* TODO: add rtnl locking around device creation and qdisc install */
- ieee80211_install_qdisc(dev);
-
- ieee80211_wep_init(local);
- ieee80211_proc_init_interface(local);
- return 0;
-
-fail_rate:
- unregister_netdev(dev);
-fail_3rd_dev:
- unregister_netdev(local->apdev);
-fail_2nd_dev:
- unregister_netdev(local->wdev);
- sta_info_stop(local);
- return result;
-}
-
-int ieee80211_update_hw(struct net_device *dev, struct ieee80211_hw *hw)
-{
- struct ieee80211_local *local = dev->priv;
-
- local->hw = hw;
-
- /* Backwards compatibility for low-level drivers that do not set number
- * of TX queues. */
- if (hw->queues == 0)
- hw->queues = 1;
-
- memcpy(local->apdev->dev_addr, dev->dev_addr, ETH_ALEN);
- local->apdev->base_addr = dev->base_addr;
- local->apdev->irq = dev->irq;
- local->apdev->mem_start = dev->mem_start;
- local->apdev->mem_end = dev->mem_end;
-
- memcpy(local->wdev->dev_addr, dev->dev_addr, ETH_ALEN);
- local->wdev->base_addr = dev->base_addr;
- local->wdev->irq = dev->irq;
- local->wdev->mem_start = dev->mem_start;
- local->wdev->mem_end = dev->mem_end;
-
- if (!hw->modes || !hw->modes->channels || !hw->modes->rates ||
- !hw->modes->num_channels || !hw->modes->num_rates)
- return -1;
-
- ieee80211_precalc_rates(hw);
- local->conf.phymode = hw->modes[0].mode;
- local->curr_rates = hw->modes[0].rates;
- local->num_curr_rates = hw->modes[0].num_rates;
- ieee80211_prepare_rates(dev);
-
- local->conf.freq = local->hw->modes[0].channels[0].freq;
- local->conf.channel = local->hw->modes[0].channels[0].chan;
- local->conf.channel_val = local->hw->modes[0].channels[0].val;
- /* FIXME: Invoke config to allow driver to set the channel. */
-
- return 0;
-}
-
-void ieee80211_unregister_hw(struct net_device *dev)
-{
- struct ieee80211_local *local = dev->priv;
- struct list_head *ptr, *n;
- int i;
-
- tasklet_disable(&local->tasklet);
- /* TODO: skb_queue should be empty here, no need to do anything? */
-
- if (local->rate_limit)
- del_timer_sync(&local->rate_limit_timer);
- if (local->stat_time)
- del_timer_sync(&local->stat_timer);
- if (local->scan_timer.data)
- del_timer_sync(&local->scan_timer);
- ieee80211_rx_bss_list_deinit(dev);
-
- list_for_each_safe(ptr, n, &local->sub_if_list) {
- struct ieee80211_sub_if_data *sdata =
- list_entry(ptr, struct ieee80211_sub_if_data, list);
- ieee80211_if_del(local, sdata, 0);
- }
-
- sta_info_stop(local);
-
- for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
- if (local->fragments[i].skb)
- dev_kfree_skb(local->fragments[i].skb);
-
- for (i = 0; i < NUM_IEEE80211_MODES; i++) {
- kfree(local->supp_rates[i]);
- kfree(local->basic_rates[i]);
- }
-
- kfree(local->conf.ssid);
- kfree(local->conf.generic_elem);
-
- ieee80211_proc_deinit_interface(local);
-
- skb_queue_purge(&local->skb_queue);
- skb_queue_purge(&local->skb_queue_unreliable);
-
- rate_control_free(local);
-}
-
-void ieee80211_free_hw(struct net_device *dev)
-{
- struct ieee80211_local *local = dev->priv;
-
- kfree(local->sta_devs);
- kfree(local->bss_devs);
- kfree(dev);
-}
-
-/* Perform netif operations on all configured interfaces */
-int ieee80211_netif_oper(struct net_device *sdev, Netif_Oper op)
-{
- struct ieee80211_local *local = sdev->priv;
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(sdev);
- struct net_device *dev = sdata->master;
-
- switch (op) {
- case NETIF_ATTACH:
- netif_device_attach(dev);
- break;
- case NETIF_DETACH:
- netif_device_detach(dev);
- break;
- case NETIF_START:
- netif_start_queue(dev);
- break;
- case NETIF_STOP:
- break;
- case NETIF_WAKE:
- if (local->scan.in_scan == 0) {
- netif_wake_queue(dev);
-#if 1
- if (/* FIX: 802.11 qdisc in use */ 1)
- __netif_schedule(dev);
-#endif
- }
- break;
- case NETIF_IS_STOPPED:
- if (netif_queue_stopped(dev))
- return 1;
- break;
- case NETIF_UPDATE_TX_START:
- dev->trans_start = jiffies;
- break;
- }
-
- return 0;
-}
-
-
-void * ieee80211_dev_hw_data(struct net_device *dev)
-{
- struct ieee80211_local *local = dev->priv;
- return local->hw_priv;
-}
-
-
-void * ieee80211_dev_stats(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata;
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- return &(sdata->stats);
-}
-
-
-int ieee80211_rate_control_register(struct rate_control_ops *ops)
-{
- struct rate_control_algs *alg;
-
- alg = kmalloc(sizeof(*alg), GFP_KERNEL);
- if (alg == NULL) {
- return -1;
- }
- memset(alg, 0, sizeof(*alg));
- alg->next = ieee80211_rate_ctrl_algs;
- alg->ops = ops;
- ieee80211_rate_ctrl_algs = alg;
-
- return 0;
-}
-
-
-void ieee80211_rate_control_unregister(struct rate_control_ops *ops)
-{
- struct rate_control_algs *alg, *prev;
-
- prev = NULL;
- alg = ieee80211_rate_ctrl_algs;
- while (alg) {
- if (alg->ops == ops) {
- if (prev)
- prev->next = alg->next;
- else
- ieee80211_rate_ctrl_algs = alg->next;
- kfree(alg);
- break;
- }
- prev = alg;
- alg = alg->next;
- }
-}
-
-
-static int rate_control_initialize(struct ieee80211_local *local)
-{
- struct rate_control_algs *algs;
- for (algs = ieee80211_rate_ctrl_algs; algs; algs = algs->next) {
- local->rate_ctrl = algs->ops;
- local->rate_ctrl_priv = rate_control_alloc(local);
- if (local->rate_ctrl_priv) {
- printk(KERN_DEBUG "%s: Selected rate control "
- "algorithm '%s'\n", local->wdev->name,
- local->rate_ctrl->name);
- return 0;
- }
- }
-
- printk(KERN_WARNING "%s: Failed to select rate control algorithm\n",
- local->wdev->name);
- return -1;
-}
-
-
-static int __init ieee80211_init(void)
-{
- struct sk_buff *skb;
- if (sizeof(struct ieee80211_tx_packet_data) > (sizeof(skb->cb))) {
- printk("80211: ieee80211_tx_packet_data is bigger "
- "than the skb->cb (%d > %d)\n",
- (int) sizeof(struct ieee80211_tx_packet_data),
- (int) sizeof(skb->cb));
- return -EINVAL;
- }
- if (sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)) {
- printk("80211: ieee80211_rx_status is bigger "
- "than the skb->cb (%d > %d)\n",
- (int) sizeof(struct ieee80211_rx_status),
- (int) sizeof(skb->cb));
- return -EINVAL;
- }
-
- ieee80211_proc_init();
- {
- int ret = ieee80211_wme_register();
- if (ret) {
- printk(KERN_DEBUG "ieee80211_init: failed to "
- "initialize WME (err=%d)\n", ret);
- ieee80211_proc_deinit();
- return ret;
- }
- }
-
- return 0;
-}
-
-
-static void __exit ieee80211_exit(void)
-{
- ieee80211_wme_unregister();
- ieee80211_proc_deinit();
-}
-
-
-EXPORT_SYMBOL(ieee80211_alloc_hw);
-EXPORT_SYMBOL(ieee80211_register_hw);
-EXPORT_SYMBOL(ieee80211_update_hw);
-EXPORT_SYMBOL(ieee80211_unregister_hw);
-EXPORT_SYMBOL(ieee80211_free_hw);
-EXPORT_SYMBOL(ieee80211_rx);
-EXPORT_SYMBOL(ieee80211_tx_status);
-EXPORT_SYMBOL(ieee80211_beacon_get);
-EXPORT_SYMBOL(ieee80211_get_buffered_bc);
-EXPORT_SYMBOL(ieee80211_netif_oper);
-EXPORT_SYMBOL(ieee80211_dev_hw_data);
-EXPORT_SYMBOL(ieee80211_dev_stats);
-EXPORT_SYMBOL(ieee80211_get_hw_conf);
-EXPORT_SYMBOL(ieee80211_set_aid_for_sta);
-EXPORT_SYMBOL(ieee80211_rx_irqsafe);
-EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
-EXPORT_SYMBOL(ieee80211_get_hdrlen);
-EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
-EXPORT_SYMBOL(ieee80211_rate_control_register);
-EXPORT_SYMBOL(ieee80211_rate_control_unregister);
-EXPORT_SYMBOL(sta_info_get);
-EXPORT_SYMBOL(sta_info_release);
-EXPORT_SYMBOL(ieee80211_radar_status);
-
-module_init(ieee80211_init);
-module_exit(ieee80211_exit);
projects / openwrt / svn-archive / archive.git / blobdiff