diff options
Diffstat (limited to 'target/linux/package/ieee80211-dscape/src/ieee80211.c')
| -rw-r--r-- | target/linux/package/ieee80211-dscape/src/ieee80211.c | 4895 |
1 files changed, 0 insertions, 4895 deletions
diff --git a/target/linux/package/ieee80211-dscape/src/ieee80211.c b/target/linux/package/ieee80211-dscape/src/ieee80211.c deleted file mode 100644 index 5e4e7acfba..0000000000 --- a/target/linux/package/ieee80211-dscape/src/ieee80211.c +++ /dev/null @@ -1,4895 +0,0 @@ -/* - * 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); |