From aa6f5ffbdba45aa8e19e5048648fc6c7b25376d3 Mon Sep 17 00:00:00 2001 From: merge Date: Thu, 22 Jan 2009 13:55:32 +0000 Subject: MERGE-via-pending-tracking-hist-MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141 pending-tracking-hist top was MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141 / fdf777a63bcb59e0dfd78bfe2c6242e01f6d4eb9 ... parent commitmessage: From: merge MERGE-via-stable-tracking-hist-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040 stable-tracking-hist top was MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040 / 90463bfd2d5a3c8b52f6e6d71024a00e052b0ced ... parent commitmessage: From: merge MERGE-via-mokopatches-tracking-hist-fix-stray-endmenu-patch mokopatches-tracking-hist top was fix-stray-endmenu-patch / 3630e0be570de8057e7f8d2fe501ed353cdf34e6 ... parent commitmessage: From: Andy Green fix-stray-endmenu.patch Signed-off-by: Andy Green --- net/ieee80211/ieee80211_tx.c | 545 ------------------------------------------- 1 file changed, 545 deletions(-) delete mode 100644 net/ieee80211/ieee80211_tx.c (limited to 'net/ieee80211/ieee80211_tx.c') diff --git a/net/ieee80211/ieee80211_tx.c b/net/ieee80211/ieee80211_tx.c deleted file mode 100644 index d996547f7a6..00000000000 --- a/net/ieee80211/ieee80211_tx.c +++ /dev/null @@ -1,545 +0,0 @@ -/****************************************************************************** - - Copyright(c) 2003 - 2005 Intel Corporation. All rights reserved. - - This program is free software; you can redistribute it and/or modify it - under the terms of version 2 of the GNU General Public License as - published by the Free Software Foundation. - - This program is distributed in the hope that it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - more details. - - You should have received a copy of the GNU General Public License along with - this program; if not, write to the Free Software Foundation, Inc., 59 - Temple Place - Suite 330, Boston, MA 02111-1307, USA. - - The full GNU General Public License is included in this distribution in the - file called LICENSE. - - Contact Information: - James P. Ketrenos - Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - -******************************************************************************/ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -/* - -802.11 Data Frame - - ,-------------------------------------------------------------------. -Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 | - |------|------|---------|---------|---------|------|---------|------| -Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs | - | | tion | (BSSID) | | | ence | data | | - `--------------------------------------------------| |------' -Total: 28 non-data bytes `----.----' - | - .- 'Frame data' expands, if WEP enabled, to <----------' - | - V - ,-----------------------. -Bytes | 4 | 0-2296 | 4 | - |-----|-----------|-----| -Desc. | IV | Encrypted | ICV | - | | Packet | | - `-----| |-----' - `-----.-----' - | - .- 'Encrypted Packet' expands to - | - V - ,---------------------------------------------------. -Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 | - |------|------|---------|----------|------|---------| -Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP | - | DSAP | SSAP | | | | Packet | - | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | | - `---------------------------------------------------- -Total: 8 non-data bytes - -802.3 Ethernet Data Frame - - ,-----------------------------------------. -Bytes | 6 | 6 | 2 | Variable | 4 | - |-------|-------|------|-----------|------| -Desc. | Dest. | Source| Type | IP Packet | fcs | - | MAC | MAC | | | | - `-----------------------------------------' -Total: 18 non-data bytes - -In the event that fragmentation is required, the incoming payload is split into -N parts of size ieee->fts. The first fragment contains the SNAP header and the -remaining packets are just data. - -If encryption is enabled, each fragment payload size is reduced by enough space -to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP) -So if you have 1500 bytes of payload with ieee->fts set to 500 without -encryption it will take 3 frames. With WEP it will take 4 frames as the -payload of each frame is reduced to 492 bytes. - -* SKB visualization -* -* ,- skb->data -* | -* | ETHERNET HEADER ,-<-- PAYLOAD -* | | 14 bytes from skb->data -* | 2 bytes for Type --> ,T. | (sizeof ethhdr) -* | | | | -* |,-Dest.--. ,--Src.---. | | | -* | 6 bytes| | 6 bytes | | | | -* v | | | | | | -* 0 | v 1 | v | v 2 -* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 -* ^ | ^ | ^ | -* | | | | | | -* | | | | `T' <---- 2 bytes for Type -* | | | | -* | | '---SNAP--' <-------- 6 bytes for SNAP -* | | -* `-IV--' <-------------------- 4 bytes for IV (WEP) -* -* SNAP HEADER -* -*/ - -static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 }; -static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 }; - -static int ieee80211_copy_snap(u8 * data, __be16 h_proto) -{ - struct ieee80211_snap_hdr *snap; - u8 *oui; - - snap = (struct ieee80211_snap_hdr *)data; - snap->dsap = 0xaa; - snap->ssap = 0xaa; - snap->ctrl = 0x03; - - if (h_proto == htons(ETH_P_AARP) || h_proto == htons(ETH_P_IPX)) - oui = P802_1H_OUI; - else - oui = RFC1042_OUI; - snap->oui[0] = oui[0]; - snap->oui[1] = oui[1]; - snap->oui[2] = oui[2]; - - memcpy(data + SNAP_SIZE, &h_proto, sizeof(u16)); - - return SNAP_SIZE + sizeof(u16); -} - -static int ieee80211_encrypt_fragment(struct ieee80211_device *ieee, - struct sk_buff *frag, int hdr_len) -{ - struct ieee80211_crypt_data *crypt = ieee->crypt[ieee->tx_keyidx]; - int res; - - if (crypt == NULL) - return -1; - - /* To encrypt, frame format is: - * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) */ - atomic_inc(&crypt->refcnt); - res = 0; - if (crypt->ops && crypt->ops->encrypt_mpdu) - res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv); - - atomic_dec(&crypt->refcnt); - if (res < 0) { - printk(KERN_INFO "%s: Encryption failed: len=%d.\n", - ieee->dev->name, frag->len); - ieee->ieee_stats.tx_discards++; - return -1; - } - - return 0; -} - -void ieee80211_txb_free(struct ieee80211_txb *txb) -{ - int i; - if (unlikely(!txb)) - return; - for (i = 0; i < txb->nr_frags; i++) - if (txb->fragments[i]) - dev_kfree_skb_any(txb->fragments[i]); - kfree(txb); -} - -static struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size, - int headroom, gfp_t gfp_mask) -{ - struct ieee80211_txb *txb; - int i; - txb = kmalloc(sizeof(struct ieee80211_txb) + (sizeof(u8 *) * nr_frags), - gfp_mask); - if (!txb) - return NULL; - - memset(txb, 0, sizeof(struct ieee80211_txb)); - txb->nr_frags = nr_frags; - txb->frag_size = txb_size; - - for (i = 0; i < nr_frags; i++) { - txb->fragments[i] = __dev_alloc_skb(txb_size + headroom, - gfp_mask); - if (unlikely(!txb->fragments[i])) { - i--; - break; - } - skb_reserve(txb->fragments[i], headroom); - } - if (unlikely(i != nr_frags)) { - while (i >= 0) - dev_kfree_skb_any(txb->fragments[i--]); - kfree(txb); - return NULL; - } - return txb; -} - -static int ieee80211_classify(struct sk_buff *skb) -{ - struct ethhdr *eth; - struct iphdr *ip; - - eth = (struct ethhdr *)skb->data; - if (eth->h_proto != htons(ETH_P_IP)) - return 0; - - ip = ip_hdr(skb); - switch (ip->tos & 0xfc) { - case 0x20: - return 2; - case 0x40: - return 1; - case 0x60: - return 3; - case 0x80: - return 4; - case 0xa0: - return 5; - case 0xc0: - return 6; - case 0xe0: - return 7; - default: - return 0; - } -} - -/* Incoming skb is converted to a txb which consists of - * a block of 802.11 fragment packets (stored as skbs) */ -int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct ieee80211_device *ieee = netdev_priv(dev); - struct ieee80211_txb *txb = NULL; - struct ieee80211_hdr_3addrqos *frag_hdr; - int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size, - rts_required; - unsigned long flags; - struct net_device_stats *stats = &ieee->stats; - int encrypt, host_encrypt, host_encrypt_msdu, host_build_iv; - __be16 ether_type; - int bytes, fc, hdr_len; - struct sk_buff *skb_frag; - struct ieee80211_hdr_3addrqos header = {/* Ensure zero initialized */ - .duration_id = 0, - .seq_ctl = 0, - .qos_ctl = 0 - }; - u8 dest[ETH_ALEN], src[ETH_ALEN]; - struct ieee80211_crypt_data *crypt; - int priority = skb->priority; - int snapped = 0; - - if (ieee->is_queue_full && (*ieee->is_queue_full) (dev, priority)) - return NETDEV_TX_BUSY; - - spin_lock_irqsave(&ieee->lock, flags); - - /* If there is no driver handler to take the TXB, dont' bother - * creating it... */ - if (!ieee->hard_start_xmit) { - printk(KERN_WARNING "%s: No xmit handler.\n", ieee->dev->name); - goto success; - } - - if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) { - printk(KERN_WARNING "%s: skb too small (%d).\n", - ieee->dev->name, skb->len); - goto success; - } - - ether_type = ((struct ethhdr *)skb->data)->h_proto; - - crypt = ieee->crypt[ieee->tx_keyidx]; - - encrypt = !(ether_type == htons(ETH_P_PAE) && ieee->ieee802_1x) && - ieee->sec.encrypt; - - host_encrypt = ieee->host_encrypt && encrypt && crypt; - host_encrypt_msdu = ieee->host_encrypt_msdu && encrypt && crypt; - host_build_iv = ieee->host_build_iv && encrypt && crypt; - - if (!encrypt && ieee->ieee802_1x && - ieee->drop_unencrypted && ether_type != htons(ETH_P_PAE)) { - stats->tx_dropped++; - goto success; - } - - /* Save source and destination addresses */ - skb_copy_from_linear_data(skb, dest, ETH_ALEN); - skb_copy_from_linear_data_offset(skb, ETH_ALEN, src, ETH_ALEN); - - if (host_encrypt || host_build_iv) - fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA | - IEEE80211_FCTL_PROTECTED; - else - fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; - - if (ieee->iw_mode == IW_MODE_INFRA) { - fc |= IEEE80211_FCTL_TODS; - /* To DS: Addr1 = BSSID, Addr2 = SA, Addr3 = DA */ - memcpy(header.addr1, ieee->bssid, ETH_ALEN); - memcpy(header.addr2, src, ETH_ALEN); - memcpy(header.addr3, dest, ETH_ALEN); - } else if (ieee->iw_mode == IW_MODE_ADHOC) { - /* not From/To DS: Addr1 = DA, Addr2 = SA, Addr3 = BSSID */ - memcpy(header.addr1, dest, ETH_ALEN); - memcpy(header.addr2, src, ETH_ALEN); - memcpy(header.addr3, ieee->bssid, ETH_ALEN); - } - hdr_len = IEEE80211_3ADDR_LEN; - - if (ieee->is_qos_active && ieee->is_qos_active(dev, skb)) { - fc |= IEEE80211_STYPE_QOS_DATA; - hdr_len += 2; - - skb->priority = ieee80211_classify(skb); - header.qos_ctl |= cpu_to_le16(skb->priority & IEEE80211_QCTL_TID); - } - header.frame_ctl = cpu_to_le16(fc); - - /* Advance the SKB to the start of the payload */ - skb_pull(skb, sizeof(struct ethhdr)); - - /* Determine total amount of storage required for TXB packets */ - bytes = skb->len + SNAP_SIZE + sizeof(u16); - - /* Encrypt msdu first on the whole data packet. */ - if ((host_encrypt || host_encrypt_msdu) && - crypt && crypt->ops && crypt->ops->encrypt_msdu) { - int res = 0; - int len = bytes + hdr_len + crypt->ops->extra_msdu_prefix_len + - crypt->ops->extra_msdu_postfix_len; - struct sk_buff *skb_new = dev_alloc_skb(len); - - if (unlikely(!skb_new)) - goto failed; - - skb_reserve(skb_new, crypt->ops->extra_msdu_prefix_len); - memcpy(skb_put(skb_new, hdr_len), &header, hdr_len); - snapped = 1; - ieee80211_copy_snap(skb_put(skb_new, SNAP_SIZE + sizeof(u16)), - ether_type); - skb_copy_from_linear_data(skb, skb_put(skb_new, skb->len), skb->len); - res = crypt->ops->encrypt_msdu(skb_new, hdr_len, crypt->priv); - if (res < 0) { - IEEE80211_ERROR("msdu encryption failed\n"); - dev_kfree_skb_any(skb_new); - goto failed; - } - dev_kfree_skb_any(skb); - skb = skb_new; - bytes += crypt->ops->extra_msdu_prefix_len + - crypt->ops->extra_msdu_postfix_len; - skb_pull(skb, hdr_len); - } - - if (host_encrypt || ieee->host_open_frag) { - /* Determine fragmentation size based on destination (multicast - * and broadcast are not fragmented) */ - if (is_multicast_ether_addr(dest) || - is_broadcast_ether_addr(dest)) - frag_size = MAX_FRAG_THRESHOLD; - else - frag_size = ieee->fts; - - /* Determine amount of payload per fragment. Regardless of if - * this stack is providing the full 802.11 header, one will - * eventually be affixed to this fragment -- so we must account - * for it when determining the amount of payload space. */ - bytes_per_frag = frag_size - hdr_len; - if (ieee->config & - (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) - bytes_per_frag -= IEEE80211_FCS_LEN; - - /* Each fragment may need to have room for encryptiong - * pre/postfix */ - if (host_encrypt) - bytes_per_frag -= crypt->ops->extra_mpdu_prefix_len + - crypt->ops->extra_mpdu_postfix_len; - - /* Number of fragments is the total - * bytes_per_frag / payload_per_fragment */ - nr_frags = bytes / bytes_per_frag; - bytes_last_frag = bytes % bytes_per_frag; - if (bytes_last_frag) - nr_frags++; - else - bytes_last_frag = bytes_per_frag; - } else { - nr_frags = 1; - bytes_per_frag = bytes_last_frag = bytes; - frag_size = bytes + hdr_len; - } - - rts_required = (frag_size > ieee->rts - && ieee->config & CFG_IEEE80211_RTS); - if (rts_required) - nr_frags++; - - /* When we allocate the TXB we allocate enough space for the reserve - * and full fragment bytes (bytes_per_frag doesn't include prefix, - * postfix, header, FCS, etc.) */ - txb = ieee80211_alloc_txb(nr_frags, frag_size, - ieee->tx_headroom, GFP_ATOMIC); - if (unlikely(!txb)) { - printk(KERN_WARNING "%s: Could not allocate TXB\n", - ieee->dev->name); - goto failed; - } - txb->encrypted = encrypt; - if (host_encrypt) - txb->payload_size = frag_size * (nr_frags - 1) + - bytes_last_frag; - else - txb->payload_size = bytes; - - if (rts_required) { - skb_frag = txb->fragments[0]; - frag_hdr = - (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len); - - /* - * Set header frame_ctl to the RTS. - */ - header.frame_ctl = - cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); - memcpy(frag_hdr, &header, hdr_len); - - /* - * Restore header frame_ctl to the original data setting. - */ - header.frame_ctl = cpu_to_le16(fc); - - if (ieee->config & - (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) - skb_put(skb_frag, 4); - - txb->rts_included = 1; - i = 1; - } else - i = 0; - - for (; i < nr_frags; i++) { - skb_frag = txb->fragments[i]; - - if (host_encrypt || host_build_iv) - skb_reserve(skb_frag, - crypt->ops->extra_mpdu_prefix_len); - - frag_hdr = - (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len); - memcpy(frag_hdr, &header, hdr_len); - - /* If this is not the last fragment, then add the MOREFRAGS - * bit to the frame control */ - if (i != nr_frags - 1) { - frag_hdr->frame_ctl = - cpu_to_le16(fc | IEEE80211_FCTL_MOREFRAGS); - bytes = bytes_per_frag; - } else { - /* The last fragment takes the remaining length */ - bytes = bytes_last_frag; - } - - if (i == 0 && !snapped) { - ieee80211_copy_snap(skb_put - (skb_frag, SNAP_SIZE + sizeof(u16)), - ether_type); - bytes -= SNAP_SIZE + sizeof(u16); - } - - skb_copy_from_linear_data(skb, skb_put(skb_frag, bytes), bytes); - - /* Advance the SKB... */ - skb_pull(skb, bytes); - - /* Encryption routine will move the header forward in order - * to insert the IV between the header and the payload */ - if (host_encrypt) - ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len); - else if (host_build_iv) { - atomic_inc(&crypt->refcnt); - if (crypt->ops->build_iv) - crypt->ops->build_iv(skb_frag, hdr_len, - ieee->sec.keys[ieee->sec.active_key], - ieee->sec.key_sizes[ieee->sec.active_key], - crypt->priv); - atomic_dec(&crypt->refcnt); - } - - if (ieee->config & - (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) - skb_put(skb_frag, 4); - } - - success: - spin_unlock_irqrestore(&ieee->lock, flags); - - dev_kfree_skb_any(skb); - - if (txb) { - int ret = (*ieee->hard_start_xmit) (txb, dev, priority); - if (ret == 0) { - stats->tx_packets++; - stats->tx_bytes += txb->payload_size; - return 0; - } - - ieee80211_txb_free(txb); - } - - return 0; - - failed: - spin_unlock_irqrestore(&ieee->lock, flags); - netif_stop_queue(dev); - stats->tx_errors++; - return 1; -} - -EXPORT_SYMBOL(ieee80211_txb_free); -- cgit v1.2.3