1512 lines
43 KiB
C
1512 lines
43 KiB
C
/*
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* Original code based Host AP (software wireless LAN access point) driver
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* for Intersil Prism2/2.5/3 - hostap.o module, common routines
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*
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* Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
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* <jkmaline@cc.hut.fi>
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* Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
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* Copyright (c) 2004-2005, Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation. See README and COPYING for
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* more details.
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*/
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#include <linux/compiler.h>
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#include <linux/config.h>
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#include <linux/errno.h>
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#include <linux/if_arp.h>
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#include <linux/in6.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/proc_fs.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/tcp.h>
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#include <linux/types.h>
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#include <linux/wireless.h>
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#include <linux/etherdevice.h>
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#include <asm/uaccess.h>
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#include <linux/ctype.h>
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#include <net/ieee80211.h>
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static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
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struct sk_buff *skb,
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struct ieee80211_rx_stats *rx_stats)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
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u16 fc = le16_to_cpu(hdr->frame_ctl);
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skb->dev = ieee->dev;
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skb->mac.raw = skb->data;
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skb_pull(skb, ieee80211_get_hdrlen(fc));
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skb->pkt_type = PACKET_OTHERHOST;
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skb->protocol = __constant_htons(ETH_P_80211_RAW);
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memset(skb->cb, 0, sizeof(skb->cb));
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netif_rx(skb);
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}
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/* Called only as a tasklet (software IRQ) */
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static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
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ieee80211_device
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*ieee,
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unsigned int seq,
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unsigned int frag,
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u8 * src,
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u8 * dst)
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{
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struct ieee80211_frag_entry *entry;
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int i;
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for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
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entry = &ieee->frag_cache[i];
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if (entry->skb != NULL &&
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time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
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IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
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"seq=%u last_frag=%u\n",
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entry->seq, entry->last_frag);
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dev_kfree_skb_any(entry->skb);
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entry->skb = NULL;
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}
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if (entry->skb != NULL && entry->seq == seq &&
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(entry->last_frag + 1 == frag || frag == -1) &&
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!compare_ether_addr(entry->src_addr, src) &&
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!compare_ether_addr(entry->dst_addr, dst))
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return entry;
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}
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return NULL;
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}
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/* Called only as a tasklet (software IRQ) */
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static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
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struct ieee80211_hdr_4addr *hdr)
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{
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struct sk_buff *skb = NULL;
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u16 sc;
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unsigned int frag, seq;
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struct ieee80211_frag_entry *entry;
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sc = le16_to_cpu(hdr->seq_ctl);
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frag = WLAN_GET_SEQ_FRAG(sc);
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seq = WLAN_GET_SEQ_SEQ(sc);
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if (frag == 0) {
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/* Reserve enough space to fit maximum frame length */
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skb = dev_alloc_skb(ieee->dev->mtu +
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sizeof(struct ieee80211_hdr_4addr) +
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8 /* LLC */ +
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2 /* alignment */ +
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8 /* WEP */ + ETH_ALEN /* WDS */ );
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if (skb == NULL)
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return NULL;
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entry = &ieee->frag_cache[ieee->frag_next_idx];
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ieee->frag_next_idx++;
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if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
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ieee->frag_next_idx = 0;
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if (entry->skb != NULL)
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dev_kfree_skb_any(entry->skb);
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entry->first_frag_time = jiffies;
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entry->seq = seq;
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entry->last_frag = frag;
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entry->skb = skb;
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memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
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memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
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} else {
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/* received a fragment of a frame for which the head fragment
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* should have already been received */
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entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
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hdr->addr1);
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if (entry != NULL) {
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entry->last_frag = frag;
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skb = entry->skb;
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}
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}
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return skb;
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}
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/* Called only as a tasklet (software IRQ) */
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static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
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struct ieee80211_hdr_4addr *hdr)
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{
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u16 sc;
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unsigned int seq;
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struct ieee80211_frag_entry *entry;
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sc = le16_to_cpu(hdr->seq_ctl);
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seq = WLAN_GET_SEQ_SEQ(sc);
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entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
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hdr->addr1);
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if (entry == NULL) {
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IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
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"entry (seq=%u)\n", seq);
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return -1;
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}
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entry->skb = NULL;
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return 0;
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}
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#ifdef NOT_YET
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/* ieee80211_rx_frame_mgtmt
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*
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* Responsible for handling management control frames
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*
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* Called by ieee80211_rx */
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static int
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ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
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struct ieee80211_rx_stats *rx_stats, u16 type,
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u16 stype)
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{
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if (ieee->iw_mode == IW_MODE_MASTER) {
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printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
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ieee->dev->name);
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return 0;
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/*
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hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
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skb->data);*/
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}
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if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
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if (stype == WLAN_FC_STYPE_BEACON &&
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ieee->iw_mode == IW_MODE_MASTER) {
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struct sk_buff *skb2;
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/* Process beacon frames also in kernel driver to
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* update STA(AP) table statistics */
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skb2 = skb_clone(skb, GFP_ATOMIC);
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if (skb2)
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hostap_rx(skb2->dev, skb2, rx_stats);
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}
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/* send management frames to the user space daemon for
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* processing */
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ieee->apdevstats.rx_packets++;
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ieee->apdevstats.rx_bytes += skb->len;
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prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
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return 0;
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}
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if (ieee->iw_mode == IW_MODE_MASTER) {
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if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
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printk(KERN_DEBUG "%s: unknown management frame "
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"(type=0x%02x, stype=0x%02x) dropped\n",
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skb->dev->name, type, stype);
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return -1;
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}
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hostap_rx(skb->dev, skb, rx_stats);
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return 0;
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}
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printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
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"received in non-Host AP mode\n", skb->dev->name);
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return -1;
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}
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#endif
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/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
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/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
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static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
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/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
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static unsigned char bridge_tunnel_header[] =
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{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
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/* No encapsulation header if EtherType < 0x600 (=length) */
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/* Called by ieee80211_rx_frame_decrypt */
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static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
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struct sk_buff *skb)
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{
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struct net_device *dev = ieee->dev;
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u16 fc, ethertype;
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struct ieee80211_hdr_3addr *hdr;
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u8 *pos;
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if (skb->len < 24)
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return 0;
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hdr = (struct ieee80211_hdr_3addr *)skb->data;
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fc = le16_to_cpu(hdr->frame_ctl);
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/* check that the frame is unicast frame to us */
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if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
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IEEE80211_FCTL_TODS &&
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!compare_ether_addr(hdr->addr1, dev->dev_addr) &&
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!compare_ether_addr(hdr->addr3, dev->dev_addr)) {
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/* ToDS frame with own addr BSSID and DA */
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} else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
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IEEE80211_FCTL_FROMDS &&
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!compare_ether_addr(hdr->addr1, dev->dev_addr)) {
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/* FromDS frame with own addr as DA */
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} else
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return 0;
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if (skb->len < 24 + 8)
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return 0;
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/* check for port access entity Ethernet type */
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pos = skb->data + 24;
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ethertype = (pos[6] << 8) | pos[7];
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if (ethertype == ETH_P_PAE)
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return 1;
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return 0;
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}
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/* Called only as a tasklet (software IRQ), by ieee80211_rx */
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static int
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ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
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struct ieee80211_crypt_data *crypt)
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{
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struct ieee80211_hdr_3addr *hdr;
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int res, hdrlen;
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if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
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return 0;
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hdr = (struct ieee80211_hdr_3addr *)skb->data;
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hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
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atomic_inc(&crypt->refcnt);
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res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
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atomic_dec(&crypt->refcnt);
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if (res < 0) {
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IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
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") res=%d\n", MAC_ARG(hdr->addr2), res);
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if (res == -2)
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IEEE80211_DEBUG_DROP("Decryption failed ICV "
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"mismatch (key %d)\n",
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skb->data[hdrlen + 3] >> 6);
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ieee->ieee_stats.rx_discards_undecryptable++;
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return -1;
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}
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return res;
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}
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/* Called only as a tasklet (software IRQ), by ieee80211_rx */
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static int
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ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
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struct sk_buff *skb, int keyidx,
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struct ieee80211_crypt_data *crypt)
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{
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struct ieee80211_hdr_3addr *hdr;
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int res, hdrlen;
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if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
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return 0;
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hdr = (struct ieee80211_hdr_3addr *)skb->data;
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hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
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atomic_inc(&crypt->refcnt);
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res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
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atomic_dec(&crypt->refcnt);
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if (res < 0) {
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printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
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" (SA=" MAC_FMT " keyidx=%d)\n",
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ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
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return -1;
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}
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|
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return 0;
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}
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|
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/* All received frames are sent to this function. @skb contains the frame in
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* IEEE 802.11 format, i.e., in the format it was sent over air.
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* This function is called only as a tasklet (software IRQ). */
|
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int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
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struct ieee80211_rx_stats *rx_stats)
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{
|
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struct net_device *dev = ieee->dev;
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struct ieee80211_hdr_4addr *hdr;
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size_t hdrlen;
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u16 fc, type, stype, sc;
|
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struct net_device_stats *stats;
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unsigned int frag;
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u8 *payload;
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u16 ethertype;
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#ifdef NOT_YET
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struct net_device *wds = NULL;
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struct sk_buff *skb2 = NULL;
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struct net_device *wds = NULL;
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int frame_authorized = 0;
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int from_assoc_ap = 0;
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void *sta = NULL;
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#endif
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u8 dst[ETH_ALEN];
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u8 src[ETH_ALEN];
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struct ieee80211_crypt_data *crypt = NULL;
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int keyidx = 0;
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|
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hdr = (struct ieee80211_hdr_4addr *)skb->data;
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stats = &ieee->stats;
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|
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if (skb->len < 10) {
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printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
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goto rx_dropped;
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}
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|
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fc = le16_to_cpu(hdr->frame_ctl);
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type = WLAN_FC_GET_TYPE(fc);
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stype = WLAN_FC_GET_STYPE(fc);
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sc = le16_to_cpu(hdr->seq_ctl);
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frag = WLAN_GET_SEQ_FRAG(sc);
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hdrlen = ieee80211_get_hdrlen(fc);
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|
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/* Put this code here so that we avoid duplicating it in all
|
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* Rx paths. - Jean II */
|
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#ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
|
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#ifdef CONFIG_NET_RADIO
|
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/* If spy monitoring on */
|
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if (ieee->spy_data.spy_number > 0) {
|
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struct iw_quality wstats;
|
|
|
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wstats.updated = 0;
|
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if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
|
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wstats.level = rx_stats->rssi;
|
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wstats.updated |= IW_QUAL_LEVEL_UPDATED;
|
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} else
|
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wstats.updated |= IW_QUAL_LEVEL_INVALID;
|
|
|
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if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
|
|
wstats.noise = rx_stats->noise;
|
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wstats.updated |= IW_QUAL_NOISE_UPDATED;
|
|
} else
|
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wstats.updated |= IW_QUAL_NOISE_INVALID;
|
|
|
|
if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
|
|
wstats.qual = rx_stats->signal;
|
|
wstats.updated |= IW_QUAL_QUAL_UPDATED;
|
|
} else
|
|
wstats.updated |= IW_QUAL_QUAL_INVALID;
|
|
|
|
/* Update spy records */
|
|
wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
|
|
}
|
|
#endif /* CONFIG_NET_RADIO */
|
|
#endif /* IW_WIRELESS_SPY */
|
|
|
|
#ifdef NOT_YET
|
|
hostap_update_rx_stats(local->ap, hdr, rx_stats);
|
|
#endif
|
|
|
|
if (ieee->iw_mode == IW_MODE_MONITOR) {
|
|
ieee80211_monitor_rx(ieee, skb, rx_stats);
|
|
stats->rx_packets++;
|
|
stats->rx_bytes += skb->len;
|
|
return 1;
|
|
}
|
|
|
|
if (is_multicast_ether_addr(hdr->addr1)
|
|
? ieee->host_mc_decrypt : ieee->host_decrypt) {
|
|
int idx = 0;
|
|
if (skb->len >= hdrlen + 3)
|
|
idx = skb->data[hdrlen + 3] >> 6;
|
|
crypt = ieee->crypt[idx];
|
|
#ifdef NOT_YET
|
|
sta = NULL;
|
|
|
|
/* Use station specific key to override default keys if the
|
|
* receiver address is a unicast address ("individual RA"). If
|
|
* bcrx_sta_key parameter is set, station specific key is used
|
|
* even with broad/multicast targets (this is against IEEE
|
|
* 802.11, but makes it easier to use different keys with
|
|
* stations that do not support WEP key mapping). */
|
|
|
|
if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
|
|
(void)hostap_handle_sta_crypto(local, hdr, &crypt,
|
|
&sta);
|
|
#endif
|
|
|
|
/* allow NULL decrypt to indicate an station specific override
|
|
* for default encryption */
|
|
if (crypt && (crypt->ops == NULL ||
|
|
crypt->ops->decrypt_mpdu == NULL))
|
|
crypt = NULL;
|
|
|
|
if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
|
|
/* This seems to be triggered by some (multicast?)
|
|
* frames from other than current BSS, so just drop the
|
|
* frames silently instead of filling system log with
|
|
* these reports. */
|
|
IEEE80211_DEBUG_DROP("Decryption failed (not set)"
|
|
" (SA=" MAC_FMT ")\n",
|
|
MAC_ARG(hdr->addr2));
|
|
ieee->ieee_stats.rx_discards_undecryptable++;
|
|
goto rx_dropped;
|
|
}
|
|
}
|
|
#ifdef NOT_YET
|
|
if (type != WLAN_FC_TYPE_DATA) {
|
|
if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
|
|
fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
|
|
(keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
|
|
printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
|
|
"from " MAC_FMT "\n", dev->name,
|
|
MAC_ARG(hdr->addr2));
|
|
/* TODO: could inform hostapd about this so that it
|
|
* could send auth failure report */
|
|
goto rx_dropped;
|
|
}
|
|
|
|
if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
|
|
goto rx_dropped;
|
|
else
|
|
goto rx_exit;
|
|
}
|
|
#endif
|
|
|
|
/* Data frame - extract src/dst addresses */
|
|
if (skb->len < IEEE80211_3ADDR_LEN)
|
|
goto rx_dropped;
|
|
|
|
switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
|
|
case IEEE80211_FCTL_FROMDS:
|
|
memcpy(dst, hdr->addr1, ETH_ALEN);
|
|
memcpy(src, hdr->addr3, ETH_ALEN);
|
|
break;
|
|
case IEEE80211_FCTL_TODS:
|
|
memcpy(dst, hdr->addr3, ETH_ALEN);
|
|
memcpy(src, hdr->addr2, ETH_ALEN);
|
|
break;
|
|
case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
|
|
if (skb->len < IEEE80211_4ADDR_LEN)
|
|
goto rx_dropped;
|
|
memcpy(dst, hdr->addr3, ETH_ALEN);
|
|
memcpy(src, hdr->addr4, ETH_ALEN);
|
|
break;
|
|
case 0:
|
|
memcpy(dst, hdr->addr1, ETH_ALEN);
|
|
memcpy(src, hdr->addr2, ETH_ALEN);
|
|
break;
|
|
}
|
|
|
|
#ifdef NOT_YET
|
|
if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
|
|
goto rx_dropped;
|
|
if (wds) {
|
|
skb->dev = dev = wds;
|
|
stats = hostap_get_stats(dev);
|
|
}
|
|
|
|
if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
|
|
(fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
|
|
IEEE80211_FCTL_FROMDS && ieee->stadev
|
|
&& !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
|
|
/* Frame from BSSID of the AP for which we are a client */
|
|
skb->dev = dev = ieee->stadev;
|
|
stats = hostap_get_stats(dev);
|
|
from_assoc_ap = 1;
|
|
}
|
|
#endif
|
|
|
|
dev->last_rx = jiffies;
|
|
|
|
#ifdef NOT_YET
|
|
if ((ieee->iw_mode == IW_MODE_MASTER ||
|
|
ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
|
|
switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
|
|
wds != NULL)) {
|
|
case AP_RX_CONTINUE_NOT_AUTHORIZED:
|
|
frame_authorized = 0;
|
|
break;
|
|
case AP_RX_CONTINUE:
|
|
frame_authorized = 1;
|
|
break;
|
|
case AP_RX_DROP:
|
|
goto rx_dropped;
|
|
case AP_RX_EXIT:
|
|
goto rx_exit;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Nullfunc frames may have PS-bit set, so they must be passed to
|
|
* hostap_handle_sta_rx() before being dropped here. */
|
|
|
|
stype &= ~IEEE80211_STYPE_QOS_DATA;
|
|
|
|
if (stype != IEEE80211_STYPE_DATA &&
|
|
stype != IEEE80211_STYPE_DATA_CFACK &&
|
|
stype != IEEE80211_STYPE_DATA_CFPOLL &&
|
|
stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
|
|
if (stype != IEEE80211_STYPE_NULLFUNC)
|
|
IEEE80211_DEBUG_DROP("RX: dropped data frame "
|
|
"with no data (type=0x%02x, "
|
|
"subtype=0x%02x, len=%d)\n",
|
|
type, stype, skb->len);
|
|
goto rx_dropped;
|
|
}
|
|
|
|
/* skb: hdr + (possibly fragmented, possibly encrypted) payload */
|
|
|
|
if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
|
|
(keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
|
|
goto rx_dropped;
|
|
|
|
hdr = (struct ieee80211_hdr_4addr *)skb->data;
|
|
|
|
/* skb: hdr + (possibly fragmented) plaintext payload */
|
|
// PR: FIXME: hostap has additional conditions in the "if" below:
|
|
// ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
|
|
if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
|
|
int flen;
|
|
struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
|
|
IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
|
|
|
|
if (!frag_skb) {
|
|
IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
|
|
"Rx cannot get skb from fragment "
|
|
"cache (morefrag=%d seq=%u frag=%u)\n",
|
|
(fc & IEEE80211_FCTL_MOREFRAGS) != 0,
|
|
WLAN_GET_SEQ_SEQ(sc), frag);
|
|
goto rx_dropped;
|
|
}
|
|
|
|
flen = skb->len;
|
|
if (frag != 0)
|
|
flen -= hdrlen;
|
|
|
|
if (frag_skb->tail + flen > frag_skb->end) {
|
|
printk(KERN_WARNING "%s: host decrypted and "
|
|
"reassembled frame did not fit skb\n",
|
|
dev->name);
|
|
ieee80211_frag_cache_invalidate(ieee, hdr);
|
|
goto rx_dropped;
|
|
}
|
|
|
|
if (frag == 0) {
|
|
/* copy first fragment (including full headers) into
|
|
* beginning of the fragment cache skb */
|
|
memcpy(skb_put(frag_skb, flen), skb->data, flen);
|
|
} else {
|
|
/* append frame payload to the end of the fragment
|
|
* cache skb */
|
|
memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
|
|
flen);
|
|
}
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
|
|
if (fc & IEEE80211_FCTL_MOREFRAGS) {
|
|
/* more fragments expected - leave the skb in fragment
|
|
* cache for now; it will be delivered to upper layers
|
|
* after all fragments have been received */
|
|
goto rx_exit;
|
|
}
|
|
|
|
/* this was the last fragment and the frame will be
|
|
* delivered, so remove skb from fragment cache */
|
|
skb = frag_skb;
|
|
hdr = (struct ieee80211_hdr_4addr *)skb->data;
|
|
ieee80211_frag_cache_invalidate(ieee, hdr);
|
|
}
|
|
|
|
/* skb: hdr + (possible reassembled) full MSDU payload; possibly still
|
|
* encrypted/authenticated */
|
|
if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
|
|
ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
|
|
goto rx_dropped;
|
|
|
|
hdr = (struct ieee80211_hdr_4addr *)skb->data;
|
|
if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
|
|
if ( /*ieee->ieee802_1x && */
|
|
ieee80211_is_eapol_frame(ieee, skb)) {
|
|
/* pass unencrypted EAPOL frames even if encryption is
|
|
* configured */
|
|
} else {
|
|
IEEE80211_DEBUG_DROP("encryption configured, but RX "
|
|
"frame not encrypted (SA=" MAC_FMT
|
|
")\n", MAC_ARG(hdr->addr2));
|
|
goto rx_dropped;
|
|
}
|
|
}
|
|
|
|
if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
|
|
!ieee80211_is_eapol_frame(ieee, skb)) {
|
|
IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
|
|
"frame from " MAC_FMT
|
|
" (drop_unencrypted=1)\n",
|
|
MAC_ARG(hdr->addr2));
|
|
goto rx_dropped;
|
|
}
|
|
|
|
/* skb: hdr + (possible reassembled) full plaintext payload */
|
|
|
|
payload = skb->data + hdrlen;
|
|
ethertype = (payload[6] << 8) | payload[7];
|
|
|
|
#ifdef NOT_YET
|
|
/* If IEEE 802.1X is used, check whether the port is authorized to send
|
|
* the received frame. */
|
|
if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
|
|
if (ethertype == ETH_P_PAE) {
|
|
printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
|
|
dev->name);
|
|
if (ieee->hostapd && ieee->apdev) {
|
|
/* Send IEEE 802.1X frames to the user
|
|
* space daemon for processing */
|
|
prism2_rx_80211(ieee->apdev, skb, rx_stats,
|
|
PRISM2_RX_MGMT);
|
|
ieee->apdevstats.rx_packets++;
|
|
ieee->apdevstats.rx_bytes += skb->len;
|
|
goto rx_exit;
|
|
}
|
|
} else if (!frame_authorized) {
|
|
printk(KERN_DEBUG "%s: dropped frame from "
|
|
"unauthorized port (IEEE 802.1X): "
|
|
"ethertype=0x%04x\n", dev->name, ethertype);
|
|
goto rx_dropped;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* convert hdr + possible LLC headers into Ethernet header */
|
|
if (skb->len - hdrlen >= 8 &&
|
|
((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
|
|
ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
|
|
memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
|
|
/* remove RFC1042 or Bridge-Tunnel encapsulation and
|
|
* replace EtherType */
|
|
skb_pull(skb, hdrlen + SNAP_SIZE);
|
|
memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
|
|
memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
|
|
} else {
|
|
u16 len;
|
|
/* Leave Ethernet header part of hdr and full payload */
|
|
skb_pull(skb, hdrlen);
|
|
len = htons(skb->len);
|
|
memcpy(skb_push(skb, 2), &len, 2);
|
|
memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
|
|
memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
|
|
}
|
|
|
|
#ifdef NOT_YET
|
|
if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
|
|
IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
|
|
/* Non-standard frame: get addr4 from its bogus location after
|
|
* the payload */
|
|
memcpy(skb->data + ETH_ALEN,
|
|
skb->data + skb->len - ETH_ALEN, ETH_ALEN);
|
|
skb_trim(skb, skb->len - ETH_ALEN);
|
|
}
|
|
#endif
|
|
|
|
stats->rx_packets++;
|
|
stats->rx_bytes += skb->len;
|
|
|
|
#ifdef NOT_YET
|
|
if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
|
|
if (dst[0] & 0x01) {
|
|
/* copy multicast frame both to the higher layers and
|
|
* to the wireless media */
|
|
ieee->ap->bridged_multicast++;
|
|
skb2 = skb_clone(skb, GFP_ATOMIC);
|
|
if (skb2 == NULL)
|
|
printk(KERN_DEBUG "%s: skb_clone failed for "
|
|
"multicast frame\n", dev->name);
|
|
} else if (hostap_is_sta_assoc(ieee->ap, dst)) {
|
|
/* send frame directly to the associated STA using
|
|
* wireless media and not passing to higher layers */
|
|
ieee->ap->bridged_unicast++;
|
|
skb2 = skb;
|
|
skb = NULL;
|
|
}
|
|
}
|
|
|
|
if (skb2 != NULL) {
|
|
/* send to wireless media */
|
|
skb2->protocol = __constant_htons(ETH_P_802_3);
|
|
skb2->mac.raw = skb2->nh.raw = skb2->data;
|
|
/* skb2->nh.raw = skb2->data + ETH_HLEN; */
|
|
skb2->dev = dev;
|
|
dev_queue_xmit(skb2);
|
|
}
|
|
#endif
|
|
|
|
if (skb) {
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
memset(skb->cb, 0, sizeof(skb->cb));
|
|
skb->dev = dev;
|
|
skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
|
|
netif_rx(skb);
|
|
}
|
|
|
|
rx_exit:
|
|
#ifdef NOT_YET
|
|
if (sta)
|
|
hostap_handle_sta_release(sta);
|
|
#endif
|
|
return 1;
|
|
|
|
rx_dropped:
|
|
stats->rx_dropped++;
|
|
|
|
/* Returning 0 indicates to caller that we have not handled the SKB--
|
|
* so it is still allocated and can be used again by underlying
|
|
* hardware as a DMA target */
|
|
return 0;
|
|
}
|
|
|
|
#define MGMT_FRAME_FIXED_PART_LENGTH 0x24
|
|
|
|
static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
|
|
|
|
/*
|
|
* Make ther structure we read from the beacon packet has
|
|
* the right values
|
|
*/
|
|
static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
|
|
*info_element, int sub_type)
|
|
{
|
|
|
|
if (info_element->qui_subtype != sub_type)
|
|
return -1;
|
|
if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
|
|
return -1;
|
|
if (info_element->qui_type != QOS_OUI_TYPE)
|
|
return -1;
|
|
if (info_element->version != QOS_VERSION_1)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Parse a QoS parameter element
|
|
*/
|
|
static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
|
|
*element_param, struct ieee80211_info_element
|
|
*info_element)
|
|
{
|
|
int ret = 0;
|
|
u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
|
|
|
|
if ((info_element == NULL) || (element_param == NULL))
|
|
return -1;
|
|
|
|
if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
|
|
memcpy(element_param->info_element.qui, info_element->data,
|
|
info_element->len);
|
|
element_param->info_element.elementID = info_element->id;
|
|
element_param->info_element.length = info_element->len;
|
|
} else
|
|
ret = -1;
|
|
if (ret == 0)
|
|
ret = ieee80211_verify_qos_info(&element_param->info_element,
|
|
QOS_OUI_PARAM_SUB_TYPE);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Parse a QoS information element
|
|
*/
|
|
static int ieee80211_read_qos_info_element(struct
|
|
ieee80211_qos_information_element
|
|
*element_info, struct ieee80211_info_element
|
|
*info_element)
|
|
{
|
|
int ret = 0;
|
|
u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
|
|
|
|
if (element_info == NULL)
|
|
return -1;
|
|
if (info_element == NULL)
|
|
return -1;
|
|
|
|
if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
|
|
memcpy(element_info->qui, info_element->data,
|
|
info_element->len);
|
|
element_info->elementID = info_element->id;
|
|
element_info->length = info_element->len;
|
|
} else
|
|
ret = -1;
|
|
|
|
if (ret == 0)
|
|
ret = ieee80211_verify_qos_info(element_info,
|
|
QOS_OUI_INFO_SUB_TYPE);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Write QoS parameters from the ac parameters.
|
|
*/
|
|
static int ieee80211_qos_convert_ac_to_parameters(struct
|
|
ieee80211_qos_parameter_info
|
|
*param_elm, struct
|
|
ieee80211_qos_parameters
|
|
*qos_param)
|
|
{
|
|
int rc = 0;
|
|
int i;
|
|
struct ieee80211_qos_ac_parameter *ac_params;
|
|
u32 txop;
|
|
u8 cw_min;
|
|
u8 cw_max;
|
|
|
|
for (i = 0; i < QOS_QUEUE_NUM; i++) {
|
|
ac_params = &(param_elm->ac_params_record[i]);
|
|
|
|
qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
|
|
qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
|
|
|
|
cw_min = ac_params->ecw_min_max & 0x0F;
|
|
qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1);
|
|
|
|
cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
|
|
qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1);
|
|
|
|
qos_param->flag[i] =
|
|
(ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
|
|
|
|
txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
|
|
qos_param->tx_op_limit[i] = (u16) txop;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* we have a generic data element which it may contain QoS information or
|
|
* parameters element. check the information element length to decide
|
|
* which type to read
|
|
*/
|
|
static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
|
|
*info_element,
|
|
struct ieee80211_network *network)
|
|
{
|
|
int rc = 0;
|
|
struct ieee80211_qos_parameters *qos_param = NULL;
|
|
struct ieee80211_qos_information_element qos_info_element;
|
|
|
|
rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
|
|
|
|
if (rc == 0) {
|
|
network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
|
|
network->flags |= NETWORK_HAS_QOS_INFORMATION;
|
|
} else {
|
|
struct ieee80211_qos_parameter_info param_element;
|
|
|
|
rc = ieee80211_read_qos_param_element(¶m_element,
|
|
info_element);
|
|
if (rc == 0) {
|
|
qos_param = &(network->qos_data.parameters);
|
|
ieee80211_qos_convert_ac_to_parameters(¶m_element,
|
|
qos_param);
|
|
network->flags |= NETWORK_HAS_QOS_PARAMETERS;
|
|
network->qos_data.param_count =
|
|
param_element.info_element.ac_info & 0x0F;
|
|
}
|
|
}
|
|
|
|
if (rc == 0) {
|
|
IEEE80211_DEBUG_QOS("QoS is supported\n");
|
|
network->qos_data.supported = 1;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int ieee80211_parse_info_param(struct ieee80211_info_element
|
|
*info_element, u16 length,
|
|
struct ieee80211_network *network)
|
|
{
|
|
u8 i;
|
|
#ifdef CONFIG_IEEE80211_DEBUG
|
|
char rates_str[64];
|
|
char *p;
|
|
#endif
|
|
|
|
while (length >= sizeof(*info_element)) {
|
|
if (sizeof(*info_element) + info_element->len > length) {
|
|
IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
|
|
"info_element->len + 2 > left : "
|
|
"info_element->len+2=%zd left=%d, id=%d.\n",
|
|
info_element->len +
|
|
sizeof(*info_element),
|
|
length, info_element->id);
|
|
return 1;
|
|
}
|
|
|
|
switch (info_element->id) {
|
|
case MFIE_TYPE_SSID:
|
|
if (ieee80211_is_empty_essid(info_element->data,
|
|
info_element->len)) {
|
|
network->flags |= NETWORK_EMPTY_ESSID;
|
|
break;
|
|
}
|
|
|
|
network->ssid_len = min(info_element->len,
|
|
(u8) IW_ESSID_MAX_SIZE);
|
|
memcpy(network->ssid, info_element->data,
|
|
network->ssid_len);
|
|
if (network->ssid_len < IW_ESSID_MAX_SIZE)
|
|
memset(network->ssid + network->ssid_len, 0,
|
|
IW_ESSID_MAX_SIZE - network->ssid_len);
|
|
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
|
|
network->ssid, network->ssid_len);
|
|
break;
|
|
|
|
case MFIE_TYPE_RATES:
|
|
#ifdef CONFIG_IEEE80211_DEBUG
|
|
p = rates_str;
|
|
#endif
|
|
network->rates_len = min(info_element->len,
|
|
MAX_RATES_LENGTH);
|
|
for (i = 0; i < network->rates_len; i++) {
|
|
network->rates[i] = info_element->data[i];
|
|
#ifdef CONFIG_IEEE80211_DEBUG
|
|
p += snprintf(p, sizeof(rates_str) -
|
|
(p - rates_str), "%02X ",
|
|
network->rates[i]);
|
|
#endif
|
|
if (ieee80211_is_ofdm_rate
|
|
(info_element->data[i])) {
|
|
network->flags |= NETWORK_HAS_OFDM;
|
|
if (info_element->data[i] &
|
|
IEEE80211_BASIC_RATE_MASK)
|
|
network->flags &=
|
|
~NETWORK_HAS_CCK;
|
|
}
|
|
}
|
|
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
|
|
rates_str, network->rates_len);
|
|
break;
|
|
|
|
case MFIE_TYPE_RATES_EX:
|
|
#ifdef CONFIG_IEEE80211_DEBUG
|
|
p = rates_str;
|
|
#endif
|
|
network->rates_ex_len = min(info_element->len,
|
|
MAX_RATES_EX_LENGTH);
|
|
for (i = 0; i < network->rates_ex_len; i++) {
|
|
network->rates_ex[i] = info_element->data[i];
|
|
#ifdef CONFIG_IEEE80211_DEBUG
|
|
p += snprintf(p, sizeof(rates_str) -
|
|
(p - rates_str), "%02X ",
|
|
network->rates[i]);
|
|
#endif
|
|
if (ieee80211_is_ofdm_rate
|
|
(info_element->data[i])) {
|
|
network->flags |= NETWORK_HAS_OFDM;
|
|
if (info_element->data[i] &
|
|
IEEE80211_BASIC_RATE_MASK)
|
|
network->flags &=
|
|
~NETWORK_HAS_CCK;
|
|
}
|
|
}
|
|
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
|
|
rates_str, network->rates_ex_len);
|
|
break;
|
|
|
|
case MFIE_TYPE_DS_SET:
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
|
|
info_element->data[0]);
|
|
network->channel = info_element->data[0];
|
|
break;
|
|
|
|
case MFIE_TYPE_FH_SET:
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
|
|
break;
|
|
|
|
case MFIE_TYPE_CF_SET:
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
|
|
break;
|
|
|
|
case MFIE_TYPE_TIM:
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: ignored\n");
|
|
break;
|
|
|
|
case MFIE_TYPE_ERP_INFO:
|
|
network->erp_value = info_element->data[0];
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
|
|
network->erp_value);
|
|
break;
|
|
|
|
case MFIE_TYPE_IBSS_SET:
|
|
network->atim_window = info_element->data[0];
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
|
|
network->atim_window);
|
|
break;
|
|
|
|
case MFIE_TYPE_CHALLENGE:
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
|
|
break;
|
|
|
|
case MFIE_TYPE_GENERIC:
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
|
|
info_element->len);
|
|
if (!ieee80211_parse_qos_info_param_IE(info_element,
|
|
network))
|
|
break;
|
|
|
|
if (info_element->len >= 4 &&
|
|
info_element->data[0] == 0x00 &&
|
|
info_element->data[1] == 0x50 &&
|
|
info_element->data[2] == 0xf2 &&
|
|
info_element->data[3] == 0x01) {
|
|
network->wpa_ie_len = min(info_element->len + 2,
|
|
MAX_WPA_IE_LEN);
|
|
memcpy(network->wpa_ie, info_element,
|
|
network->wpa_ie_len);
|
|
}
|
|
break;
|
|
|
|
case MFIE_TYPE_RSN:
|
|
IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
|
|
info_element->len);
|
|
network->rsn_ie_len = min(info_element->len + 2,
|
|
MAX_WPA_IE_LEN);
|
|
memcpy(network->rsn_ie, info_element,
|
|
network->rsn_ie_len);
|
|
break;
|
|
|
|
case MFIE_TYPE_QOS_PARAMETER:
|
|
printk(KERN_ERR
|
|
"QoS Error need to parse QOS_PARAMETER IE\n");
|
|
break;
|
|
|
|
default:
|
|
IEEE80211_DEBUG_MGMT("unsupported IE %d\n",
|
|
info_element->id);
|
|
break;
|
|
}
|
|
|
|
length -= sizeof(*info_element) + info_element->len;
|
|
info_element =
|
|
(struct ieee80211_info_element *)&info_element->
|
|
data[info_element->len];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
|
|
*frame, struct ieee80211_rx_stats *stats)
|
|
{
|
|
struct ieee80211_network network_resp;
|
|
struct ieee80211_network *network = &network_resp;
|
|
struct net_device *dev = ieee->dev;
|
|
|
|
network->flags = 0;
|
|
network->qos_data.active = 0;
|
|
network->qos_data.supported = 0;
|
|
network->qos_data.param_count = 0;
|
|
network->qos_data.old_param_count = 0;
|
|
|
|
//network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
|
|
network->atim_window = le16_to_cpu(frame->aid);
|
|
network->listen_interval = le16_to_cpu(frame->status);
|
|
memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
|
|
network->capability = le16_to_cpu(frame->capability);
|
|
network->last_scanned = jiffies;
|
|
network->rates_len = network->rates_ex_len = 0;
|
|
network->last_associate = 0;
|
|
network->ssid_len = 0;
|
|
network->erp_value =
|
|
(network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
|
|
|
|
if (stats->freq == IEEE80211_52GHZ_BAND) {
|
|
/* for A band (No DS info) */
|
|
network->channel = stats->received_channel;
|
|
} else
|
|
network->flags |= NETWORK_HAS_CCK;
|
|
|
|
network->wpa_ie_len = 0;
|
|
network->rsn_ie_len = 0;
|
|
|
|
if (ieee80211_parse_info_param
|
|
(frame->info_element, stats->len - sizeof(*frame), network))
|
|
return 1;
|
|
|
|
network->mode = 0;
|
|
if (stats->freq == IEEE80211_52GHZ_BAND)
|
|
network->mode = IEEE_A;
|
|
else {
|
|
if (network->flags & NETWORK_HAS_OFDM)
|
|
network->mode |= IEEE_G;
|
|
if (network->flags & NETWORK_HAS_CCK)
|
|
network->mode |= IEEE_B;
|
|
}
|
|
|
|
if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
|
|
network->flags |= NETWORK_EMPTY_ESSID;
|
|
|
|
memcpy(&network->stats, stats, sizeof(network->stats));
|
|
|
|
if (ieee->handle_assoc_response != NULL)
|
|
ieee->handle_assoc_response(dev, frame, network);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/***************************************************/
|
|
|
|
static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
|
|
*beacon,
|
|
struct ieee80211_network *network,
|
|
struct ieee80211_rx_stats *stats)
|
|
{
|
|
network->qos_data.active = 0;
|
|
network->qos_data.supported = 0;
|
|
network->qos_data.param_count = 0;
|
|
network->qos_data.old_param_count = 0;
|
|
|
|
/* Pull out fixed field data */
|
|
memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
|
|
network->capability = le16_to_cpu(beacon->capability);
|
|
network->last_scanned = jiffies;
|
|
network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
|
|
network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
|
|
network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
|
|
/* Where to pull this? beacon->listen_interval; */
|
|
network->listen_interval = 0x0A;
|
|
network->rates_len = network->rates_ex_len = 0;
|
|
network->last_associate = 0;
|
|
network->ssid_len = 0;
|
|
network->flags = 0;
|
|
network->atim_window = 0;
|
|
network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
|
|
0x3 : 0x0;
|
|
|
|
if (stats->freq == IEEE80211_52GHZ_BAND) {
|
|
/* for A band (No DS info) */
|
|
network->channel = stats->received_channel;
|
|
} else
|
|
network->flags |= NETWORK_HAS_CCK;
|
|
|
|
network->wpa_ie_len = 0;
|
|
network->rsn_ie_len = 0;
|
|
|
|
if (ieee80211_parse_info_param
|
|
(beacon->info_element, stats->len - sizeof(*beacon), network))
|
|
return 1;
|
|
|
|
network->mode = 0;
|
|
if (stats->freq == IEEE80211_52GHZ_BAND)
|
|
network->mode = IEEE_A;
|
|
else {
|
|
if (network->flags & NETWORK_HAS_OFDM)
|
|
network->mode |= IEEE_G;
|
|
if (network->flags & NETWORK_HAS_CCK)
|
|
network->mode |= IEEE_B;
|
|
}
|
|
|
|
if (network->mode == 0) {
|
|
IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
|
|
"network.\n",
|
|
escape_essid(network->ssid,
|
|
network->ssid_len),
|
|
MAC_ARG(network->bssid));
|
|
return 1;
|
|
}
|
|
|
|
if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
|
|
network->flags |= NETWORK_EMPTY_ESSID;
|
|
|
|
memcpy(&network->stats, stats, sizeof(network->stats));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int is_same_network(struct ieee80211_network *src,
|
|
struct ieee80211_network *dst)
|
|
{
|
|
/* A network is only a duplicate if the channel, BSSID, and ESSID
|
|
* all match. We treat all <hidden> with the same BSSID and channel
|
|
* as one network */
|
|
return ((src->ssid_len == dst->ssid_len) &&
|
|
(src->channel == dst->channel) &&
|
|
!compare_ether_addr(src->bssid, dst->bssid) &&
|
|
!memcmp(src->ssid, dst->ssid, src->ssid_len));
|
|
}
|
|
|
|
static void update_network(struct ieee80211_network *dst,
|
|
struct ieee80211_network *src)
|
|
{
|
|
int qos_active;
|
|
u8 old_param;
|
|
|
|
memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
|
|
dst->capability = src->capability;
|
|
memcpy(dst->rates, src->rates, src->rates_len);
|
|
dst->rates_len = src->rates_len;
|
|
memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
|
|
dst->rates_ex_len = src->rates_ex_len;
|
|
|
|
dst->mode = src->mode;
|
|
dst->flags = src->flags;
|
|
dst->time_stamp[0] = src->time_stamp[0];
|
|
dst->time_stamp[1] = src->time_stamp[1];
|
|
|
|
dst->beacon_interval = src->beacon_interval;
|
|
dst->listen_interval = src->listen_interval;
|
|
dst->atim_window = src->atim_window;
|
|
dst->erp_value = src->erp_value;
|
|
|
|
memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
|
|
dst->wpa_ie_len = src->wpa_ie_len;
|
|
memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
|
|
dst->rsn_ie_len = src->rsn_ie_len;
|
|
|
|
dst->last_scanned = jiffies;
|
|
qos_active = src->qos_data.active;
|
|
old_param = dst->qos_data.old_param_count;
|
|
if (dst->flags & NETWORK_HAS_QOS_MASK)
|
|
memcpy(&dst->qos_data, &src->qos_data,
|
|
sizeof(struct ieee80211_qos_data));
|
|
else {
|
|
dst->qos_data.supported = src->qos_data.supported;
|
|
dst->qos_data.param_count = src->qos_data.param_count;
|
|
}
|
|
|
|
if (dst->qos_data.supported == 1) {
|
|
if (dst->ssid_len)
|
|
IEEE80211_DEBUG_QOS
|
|
("QoS the network %s is QoS supported\n",
|
|
dst->ssid);
|
|
else
|
|
IEEE80211_DEBUG_QOS
|
|
("QoS the network is QoS supported\n");
|
|
}
|
|
dst->qos_data.active = qos_active;
|
|
dst->qos_data.old_param_count = old_param;
|
|
|
|
/* dst->last_associate is not overwritten */
|
|
}
|
|
|
|
static inline int is_beacon(int fc)
|
|
{
|
|
return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
|
|
}
|
|
|
|
static void ieee80211_process_probe_response(struct ieee80211_device
|
|
*ieee, struct
|
|
ieee80211_probe_response
|
|
*beacon, struct ieee80211_rx_stats
|
|
*stats)
|
|
{
|
|
struct net_device *dev = ieee->dev;
|
|
struct ieee80211_network network;
|
|
struct ieee80211_network *target;
|
|
struct ieee80211_network *oldest = NULL;
|
|
#ifdef CONFIG_IEEE80211_DEBUG
|
|
struct ieee80211_info_element *info_element = beacon->info_element;
|
|
#endif
|
|
unsigned long flags;
|
|
|
|
IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
|
|
"): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
|
|
escape_essid(info_element->data,
|
|
info_element->len),
|
|
MAC_ARG(beacon->header.addr3),
|
|
(beacon->capability & (1 << 0xf)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0xe)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0xd)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0xc)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0xb)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0xa)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x9)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x8)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x7)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x6)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x5)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x4)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x3)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x2)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x1)) ? '1' : '0',
|
|
(beacon->capability & (1 << 0x0)) ? '1' : '0');
|
|
|
|
if (ieee80211_network_init(ieee, beacon, &network, stats)) {
|
|
IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
|
|
escape_essid(info_element->data,
|
|
info_element->len),
|
|
MAC_ARG(beacon->header.addr3),
|
|
is_beacon(le16_to_cpu
|
|
(beacon->header.
|
|
frame_ctl)) ?
|
|
"BEACON" : "PROBE RESPONSE");
|
|
return;
|
|
}
|
|
|
|
/* The network parsed correctly -- so now we scan our known networks
|
|
* to see if we can find it in our list.
|
|
*
|
|
* NOTE: This search is definitely not optimized. Once its doing
|
|
* the "right thing" we'll optimize it for efficiency if
|
|
* necessary */
|
|
|
|
/* Search for this entry in the list and update it if it is
|
|
* already there. */
|
|
|
|
spin_lock_irqsave(&ieee->lock, flags);
|
|
|
|
list_for_each_entry(target, &ieee->network_list, list) {
|
|
if (is_same_network(target, &network))
|
|
break;
|
|
|
|
if ((oldest == NULL) ||
|
|
(target->last_scanned < oldest->last_scanned))
|
|
oldest = target;
|
|
}
|
|
|
|
/* If we didn't find a match, then get a new network slot to initialize
|
|
* with this beacon's information */
|
|
if (&target->list == &ieee->network_list) {
|
|
if (list_empty(&ieee->network_free_list)) {
|
|
/* If there are no more slots, expire the oldest */
|
|
list_del(&oldest->list);
|
|
target = oldest;
|
|
IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
|
|
"network list.\n",
|
|
escape_essid(target->ssid,
|
|
target->ssid_len),
|
|
MAC_ARG(target->bssid));
|
|
} else {
|
|
/* Otherwise just pull from the free list */
|
|
target = list_entry(ieee->network_free_list.next,
|
|
struct ieee80211_network, list);
|
|
list_del(ieee->network_free_list.next);
|
|
}
|
|
|
|
#ifdef CONFIG_IEEE80211_DEBUG
|
|
IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
|
|
escape_essid(network.ssid,
|
|
network.ssid_len),
|
|
MAC_ARG(network.bssid),
|
|
is_beacon(le16_to_cpu
|
|
(beacon->header.
|
|
frame_ctl)) ?
|
|
"BEACON" : "PROBE RESPONSE");
|
|
#endif
|
|
memcpy(target, &network, sizeof(*target));
|
|
list_add_tail(&target->list, &ieee->network_list);
|
|
} else {
|
|
IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
|
|
escape_essid(target->ssid,
|
|
target->ssid_len),
|
|
MAC_ARG(target->bssid),
|
|
is_beacon(le16_to_cpu
|
|
(beacon->header.
|
|
frame_ctl)) ?
|
|
"BEACON" : "PROBE RESPONSE");
|
|
update_network(target, &network);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ieee->lock, flags);
|
|
|
|
if (is_beacon(le16_to_cpu(beacon->header.frame_ctl))) {
|
|
if (ieee->handle_beacon != NULL)
|
|
ieee->handle_beacon(dev, beacon, &network);
|
|
} else {
|
|
if (ieee->handle_probe_response != NULL)
|
|
ieee->handle_probe_response(dev, beacon, &network);
|
|
}
|
|
}
|
|
|
|
void ieee80211_rx_mgt(struct ieee80211_device *ieee,
|
|
struct ieee80211_hdr_4addr *header,
|
|
struct ieee80211_rx_stats *stats)
|
|
{
|
|
switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
|
|
case IEEE80211_STYPE_ASSOC_RESP:
|
|
IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
|
|
WLAN_FC_GET_STYPE(le16_to_cpu
|
|
(header->frame_ctl)));
|
|
ieee80211_handle_assoc_resp(ieee,
|
|
(struct ieee80211_assoc_response *)
|
|
header, stats);
|
|
break;
|
|
|
|
case IEEE80211_STYPE_REASSOC_RESP:
|
|
IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
|
|
WLAN_FC_GET_STYPE(le16_to_cpu
|
|
(header->frame_ctl)));
|
|
break;
|
|
|
|
case IEEE80211_STYPE_PROBE_REQ:
|
|
IEEE80211_DEBUG_MGMT("recieved auth (%d)\n",
|
|
WLAN_FC_GET_STYPE(le16_to_cpu
|
|
(header->frame_ctl)));
|
|
|
|
if (ieee->handle_probe_request != NULL)
|
|
ieee->handle_probe_request(ieee->dev,
|
|
(struct
|
|
ieee80211_probe_request *)
|
|
header, stats);
|
|
break;
|
|
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
|
|
WLAN_FC_GET_STYPE(le16_to_cpu
|
|
(header->frame_ctl)));
|
|
IEEE80211_DEBUG_SCAN("Probe response\n");
|
|
ieee80211_process_probe_response(ieee,
|
|
(struct
|
|
ieee80211_probe_response *)
|
|
header, stats);
|
|
break;
|
|
|
|
case IEEE80211_STYPE_BEACON:
|
|
IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
|
|
WLAN_FC_GET_STYPE(le16_to_cpu
|
|
(header->frame_ctl)));
|
|
IEEE80211_DEBUG_SCAN("Beacon\n");
|
|
ieee80211_process_probe_response(ieee,
|
|
(struct
|
|
ieee80211_probe_response *)
|
|
header, stats);
|
|
break;
|
|
case IEEE80211_STYPE_AUTH:
|
|
|
|
IEEE80211_DEBUG_MGMT("recieved auth (%d)\n",
|
|
WLAN_FC_GET_STYPE(le16_to_cpu
|
|
(header->frame_ctl)));
|
|
|
|
if (ieee->handle_auth != NULL)
|
|
ieee->handle_auth(ieee->dev,
|
|
(struct ieee80211_auth *)header);
|
|
break;
|
|
|
|
case IEEE80211_STYPE_DISASSOC:
|
|
if (ieee->handle_disassoc != NULL)
|
|
ieee->handle_disassoc(ieee->dev,
|
|
(struct ieee80211_disassoc *)
|
|
header);
|
|
break;
|
|
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
printk("DEAUTH from AP\n");
|
|
if (ieee->handle_deauth != NULL)
|
|
ieee->handle_deauth(ieee->dev, (struct ieee80211_auth *)
|
|
header);
|
|
break;
|
|
default:
|
|
IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
|
|
WLAN_FC_GET_STYPE(le16_to_cpu
|
|
(header->frame_ctl)));
|
|
IEEE80211_WARNING("%s: Unknown management packet: %d\n",
|
|
ieee->dev->name,
|
|
WLAN_FC_GET_STYPE(le16_to_cpu
|
|
(header->frame_ctl)));
|
|
break;
|
|
}
|
|
}
|
|
|
|
EXPORT_SYMBOL(ieee80211_rx_mgt);
|
|
EXPORT_SYMBOL(ieee80211_rx);
|