+++ /dev/null
-/*
- * Some parts based on code from net80211
- * Copyright (c) 2001 Atsushi Onoe
- * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "ieee80211softmac_priv.h"
-
-/* Helper functions for inserting data into the frames */
-
-/*
- * Adds an ESSID element to the frame
- *
- */
-static u8 *
-ieee80211softmac_add_essid(u8 *dst, struct ieee80211softmac_essid *essid)
-{
- if (essid) {
- *dst++ = MFIE_TYPE_SSID;
- *dst++ = essid->len;
- memcpy(dst, essid->data, essid->len);
- return dst+essid->len;
- } else {
- *dst++ = MFIE_TYPE_SSID;
- *dst++ = 0;
- return dst;
- }
-}
-
-/* Adds Supported Rates and if required Extended Rates Information Element
- * to the frame, ASSUMES WE HAVE A SORTED LIST OF RATES */
-static u8 *
-ieee80211softmac_frame_add_rates(u8 *dst, const struct ieee80211softmac_ratesinfo *r)
-{
- int cck_len, ofdm_len;
- *dst++ = MFIE_TYPE_RATES;
-
- for(cck_len=0; ieee80211_is_cck_rate(r->rates[cck_len]) && (cck_len < r->count);cck_len++);
-
- if(cck_len > IEEE80211SOFTMAC_MAX_RATES_LEN)
- cck_len = IEEE80211SOFTMAC_MAX_RATES_LEN;
- *dst++ = cck_len;
- memcpy(dst, r->rates, cck_len);
- dst += cck_len;
-
- if(cck_len < r->count){
- for (ofdm_len=0; ieee80211_is_ofdm_rate(r->rates[ofdm_len + cck_len]) && (ofdm_len + cck_len < r->count); ofdm_len++);
- if (ofdm_len > 0) {
- if (ofdm_len > IEEE80211SOFTMAC_MAX_EX_RATES_LEN)
- ofdm_len = IEEE80211SOFTMAC_MAX_EX_RATES_LEN;
- *dst++ = MFIE_TYPE_RATES_EX;
- *dst++ = ofdm_len;
- memcpy(dst, r->rates + cck_len, ofdm_len);
- dst += ofdm_len;
- }
- }
- return dst;
-}
-
-/* Allocate a management frame */
-static u8 *
-ieee80211softmac_alloc_mgt(u32 size)
-{
- u8 * data;
-
- /* Add the header and FCS to the size */
- size = size + IEEE80211_3ADDR_LEN;
- if(size > IEEE80211_DATA_LEN)
- return NULL;
- /* Allocate the frame */
- data = kzalloc(size, GFP_ATOMIC);
- return data;
-}
-
-/*
- * Add a 2 Address Header
- */
-static void
-ieee80211softmac_hdr_2addr(struct ieee80211softmac_device *mac,
- struct ieee80211_hdr_2addr *header, u32 type, u8 *dest)
-{
- /* Fill in the frame control flags */
- header->frame_ctl = cpu_to_le16(type);
- /* Control packets always have WEP turned off */
- if(type > IEEE80211_STYPE_CFENDACK && type < IEEE80211_STYPE_PSPOLL)
- header->frame_ctl |= mac->ieee->sec.level ? cpu_to_le16(IEEE80211_FCTL_PROTECTED) : 0;
-
- /* Fill in the duration */
- header->duration_id = 0;
- /* FIXME: How do I find this?
- * calculate. But most drivers just fill in 0 (except if it's a station id of course) */
-
- /* Fill in the Destination Address */
- if(dest == NULL)
- memset(header->addr1, 0xFF, ETH_ALEN);
- else
- memcpy(header->addr1, dest, ETH_ALEN);
- /* Fill in the Source Address */
- memcpy(header->addr2, mac->ieee->dev->dev_addr, ETH_ALEN);
-
-}
-
-
-/* Add a 3 Address Header */
-static void
-ieee80211softmac_hdr_3addr(struct ieee80211softmac_device *mac,
- struct ieee80211_hdr_3addr *header, u32 type, u8 *dest, u8 *bssid)
-{
- /* This is common with 2addr, so use that instead */
- ieee80211softmac_hdr_2addr(mac, (struct ieee80211_hdr_2addr *)header, type, dest);
-
- /* Fill in the BSS ID */
- if(bssid == NULL)
- memset(header->addr3, 0xFF, ETH_ALEN);
- else
- memcpy(header->addr3, bssid, ETH_ALEN);
-
- /* Fill in the sequence # */
- /* FIXME: I need to add this to the softmac struct
- * shouldn't the sequence number be in ieee80211? */
-}
-
-static __le16
-ieee80211softmac_capabilities(struct ieee80211softmac_device *mac,
- struct ieee80211softmac_network *net)
-{
- __le16 capability = 0;
-
- /* ESS and IBSS bits are set according to the current mode */
- switch (mac->ieee->iw_mode) {
- case IW_MODE_INFRA:
- capability = cpu_to_le16(WLAN_CAPABILITY_ESS);
- break;
- case IW_MODE_ADHOC:
- capability = cpu_to_le16(WLAN_CAPABILITY_IBSS);
- break;
- case IW_MODE_AUTO:
- capability = cpu_to_le16(net->capabilities &
- (WLAN_CAPABILITY_ESS|WLAN_CAPABILITY_IBSS));
- break;
- default:
- /* bleh. we don't ever go to these modes */
- printk(KERN_ERR PFX "invalid iw_mode!\n");
- break;
- }
-
- /* CF Pollable / CF Poll Request */
- /* Needs to be implemented, for now, the 0's == not supported */
-
- /* Privacy Bit */
- capability |= mac->ieee->sec.level ?
- cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0;
-
- /* Short Preamble */
- /* Always supported: we probably won't ever be powering devices which
- * dont support this... */
- capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);
-
- /* PBCC */
- /* Not widely used */
-
- /* Channel Agility */
- /* Not widely used */
-
- /* Short Slot */
- /* Will be implemented later */
-
- /* DSSS-OFDM */
- /* Not widely used */
-
- return capability;
-}
-
-/*****************************************************************************
- * Create Management packets
- *****************************************************************************/
-
-/* Creates an association request packet */
-static u32
-ieee80211softmac_assoc_req(struct ieee80211_assoc_request **pkt,
- struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net)
-{
- u8 *data;
- (*pkt) = (struct ieee80211_assoc_request *)ieee80211softmac_alloc_mgt(
- 2 + /* Capability Info */
- 2 + /* Listen Interval */
- /* SSID IE */
- 1 + 1 + IW_ESSID_MAX_SIZE +
- /* Rates IE */
- 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
- /* Extended Rates IE */
- 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN +
- /* WPA IE if present */
- mac->wpa.IElen
- /* Other IE's? Optional?
- * Yeah, probably need an extra IE parameter -- lots of vendors like to
- * fill in their own IEs */
- );
- if (unlikely((*pkt) == NULL))
- return 0;
- ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_ASSOC_REQ, net->bssid, net->bssid);
-
- /* Fill in the capabilities */
- (*pkt)->capability = ieee80211softmac_capabilities(mac, net);
-
- /* Fill in Listen Interval (?) */
- (*pkt)->listen_interval = cpu_to_le16(10);
-
- data = (u8 *)(*pkt)->info_element;
- /* Add SSID */
- data = ieee80211softmac_add_essid(data, &net->essid);
- /* Add Rates */
- data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
- /* Add WPA IE */
- if (mac->wpa.IElen && mac->wpa.IE) {
- memcpy(data, mac->wpa.IE, mac->wpa.IElen);
- data += mac->wpa.IElen;
- }
- /* Return the number of used bytes */
- return (data - (u8*)(*pkt));
-}
-
-/* Create a reassociation request packet */
-static u32
-ieee80211softmac_reassoc_req(struct ieee80211_reassoc_request **pkt,
- struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net)
-{
- u8 *data;
- (*pkt) = (struct ieee80211_reassoc_request *)ieee80211softmac_alloc_mgt(
- 2 + /* Capability Info */
- 2 + /* Listen Interval */
- ETH_ALEN + /* AP MAC */
- /* SSID IE */
- 1 + 1 + IW_ESSID_MAX_SIZE +
- /* Rates IE */
- 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
- /* Extended Rates IE */
- 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN
- /* Other IE's? */
- );
- if (unlikely((*pkt) == NULL))
- return 0;
- ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_REASSOC_REQ, net->bssid, net->bssid);
-
- /* Fill in the capabilities */
- (*pkt)->capability = ieee80211softmac_capabilities(mac, net);
-
- /* Fill in Listen Interval (?) */
- (*pkt)->listen_interval = cpu_to_le16(10);
- /* Fill in the current AP MAC */
- memcpy((*pkt)->current_ap, mac->ieee->bssid, ETH_ALEN);
-
- data = (u8 *)(*pkt)->info_element;
- /* Add SSID */
- data = ieee80211softmac_add_essid(data, &net->essid);
- /* Add Rates */
- data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
- /* Return packet size */
- return (data - (u8 *)(*pkt));
-}
-
-/* Create an authentication packet */
-static u32
-ieee80211softmac_auth(struct ieee80211_auth **pkt,
- struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net,
- u16 transaction, u16 status, int *encrypt_mpdu)
-{
- u8 *data;
- int auth_mode = mac->ieee->sec.auth_mode;
- int is_shared_response = (auth_mode == WLAN_AUTH_SHARED_KEY
- && transaction == IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE);
-
- /* Allocate Packet */
- (*pkt) = (struct ieee80211_auth *)ieee80211softmac_alloc_mgt(
- 2 + /* Auth Algorithm */
- 2 + /* Auth Transaction Seq */
- 2 + /* Status Code */
- /* Challenge Text IE */
- (is_shared_response ? 1 + 1 + net->challenge_len : 0)
- );
- if (unlikely((*pkt) == NULL))
- return 0;
- ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_AUTH, net->bssid, net->bssid);
-
- /* Algorithm */
- (*pkt)->algorithm = cpu_to_le16(auth_mode);
- /* Transaction */
- (*pkt)->transaction = cpu_to_le16(transaction);
- /* Status */
- (*pkt)->status = cpu_to_le16(status);
-
- data = (u8 *)(*pkt)->info_element;
- /* Challenge Text */
- if (is_shared_response) {
- *data = MFIE_TYPE_CHALLENGE;
- data++;
-
- /* Copy the challenge in */
- *data = net->challenge_len;
- data++;
- memcpy(data, net->challenge, net->challenge_len);
- data += net->challenge_len;
-
- /* Make sure this frame gets encrypted with the shared key */
- *encrypt_mpdu = 1;
- } else
- *encrypt_mpdu = 0;
-
- /* Return the packet size */
- return (data - (u8 *)(*pkt));
-}
-
-/* Create a disassocation or deauthentication packet */
-static u32
-ieee80211softmac_disassoc_deauth(struct ieee80211_disassoc **pkt,
- struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net,
- u16 type, u16 reason)
-{
- /* Allocate Packet */
- (*pkt) = (struct ieee80211_disassoc *)ieee80211softmac_alloc_mgt(2);
- if (unlikely((*pkt) == NULL))
- return 0;
- ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), type, net->bssid, net->bssid);
- /* Reason */
- (*pkt)->reason = cpu_to_le16(reason);
- /* Return the packet size */
- return (2 + IEEE80211_3ADDR_LEN);
-}
-
-/* Create a probe request packet */
-static u32
-ieee80211softmac_probe_req(struct ieee80211_probe_request **pkt,
- struct ieee80211softmac_device *mac, struct ieee80211softmac_essid *essid)
-{
- u8 *data;
- /* Allocate Packet */
- (*pkt) = (struct ieee80211_probe_request *)ieee80211softmac_alloc_mgt(
- /* SSID of requested network */
- 1 + 1 + IW_ESSID_MAX_SIZE +
- /* Rates IE */
- 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
- /* Extended Rates IE */
- 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN
- );
- if (unlikely((*pkt) == NULL))
- return 0;
- ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_REQ, NULL, NULL);
-
- data = (u8 *)(*pkt)->info_element;
- /* Add ESSID (can be NULL) */
- data = ieee80211softmac_add_essid(data, essid);
- /* Add Rates */
- data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
- /* Return packet size */
- return (data - (u8 *)(*pkt));
-}
-
-/* Create a probe response packet */
-/* FIXME: Not complete */
-static u32
-ieee80211softmac_probe_resp(struct ieee80211_probe_response **pkt,
- struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net)
-{
- u8 *data;
- /* Allocate Packet */
- (*pkt) = (struct ieee80211_probe_response *)ieee80211softmac_alloc_mgt(
- 8 + /* Timestamp */
- 2 + /* Beacon Interval */
- 2 + /* Capability Info */
- /* SSID IE */
- 1 + 1 + IW_ESSID_MAX_SIZE +
- 7 + /* FH Parameter Set */
- 2 + /* DS Parameter Set */
- 8 + /* CF Parameter Set */
- 4 /* IBSS Parameter Set */
- );
- if (unlikely((*pkt) == NULL))
- return 0;
- ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_RESP, net->bssid, net->bssid);
- data = (u8 *)(*pkt)->info_element;
-
- /* Return the packet size */
- return (data - (u8 *)(*pkt));
-}
-
-
-/* Sends a manangement packet
- * FIXME: document the use of the arg parameter
- * for _AUTH: (transaction #) | (status << 16)
- */
-int
-ieee80211softmac_send_mgt_frame(struct ieee80211softmac_device *mac,
- void *ptrarg, u32 type, u32 arg)
-{
- void *pkt = NULL;
- u32 pkt_size = 0;
- int encrypt_mpdu = 0;
-
- switch(type) {
- case IEEE80211_STYPE_ASSOC_REQ:
- pkt_size = ieee80211softmac_assoc_req((struct ieee80211_assoc_request **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg);
- break;
- case IEEE80211_STYPE_REASSOC_REQ:
- pkt_size = ieee80211softmac_reassoc_req((struct ieee80211_reassoc_request **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg);
- break;
- case IEEE80211_STYPE_AUTH:
- pkt_size = ieee80211softmac_auth((struct ieee80211_auth **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg, (u16)(arg & 0xFFFF), (u16) (arg >> 16), &encrypt_mpdu);
- break;
- case IEEE80211_STYPE_DISASSOC:
- case IEEE80211_STYPE_DEAUTH:
- pkt_size = ieee80211softmac_disassoc_deauth((struct ieee80211_disassoc **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg, type, (u16)(arg & 0xFFFF));
- break;
- case IEEE80211_STYPE_PROBE_REQ:
- pkt_size = ieee80211softmac_probe_req((struct ieee80211_probe_request **)(&pkt), mac, (struct ieee80211softmac_essid *)ptrarg);
- break;
- case IEEE80211_STYPE_PROBE_RESP:
- pkt_size = ieee80211softmac_probe_resp((struct ieee80211_probe_response **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg);
- break;
- default:
- printkl(KERN_DEBUG PFX "Unsupported Management Frame type: %i\n", type);
- return -EINVAL;
- };
-
- if(pkt_size == 0 || pkt == NULL) {
- printkl(KERN_DEBUG PFX "Error, packet is nonexistant or 0 length\n");
- return -ENOMEM;
- }
-
- /* Send the packet to the ieee80211 layer for tx */
- /* we defined softmac->mgmt_xmit for this. Should we keep it
- * as it is (that means we'd need to wrap this into a txb),
- * modify the prototype (so it matches this function),
- * or get rid of it alltogether?
- * Does this work for you now?
- */
- ieee80211_tx_frame(mac->ieee, (struct ieee80211_hdr *)pkt,
- IEEE80211_3ADDR_LEN, pkt_size, encrypt_mpdu);
-
- kfree(pkt);
- return 0;
-}
-
-/* Beacon handling */
-int ieee80211softmac_handle_beacon(struct net_device *dev,
- struct ieee80211_beacon *beacon,
- struct ieee80211_network *network)
-{
- struct ieee80211softmac_device *mac = ieee80211_priv(dev);
-
- /* This might race, but we don't really care and it's not worth
- * adding heavyweight locking in this fastpath.
- */
- if (mac->associnfo.associated) {
- if (memcmp(network->bssid, mac->associnfo.bssid, ETH_ALEN) == 0)
- ieee80211softmac_process_erp(mac, network->erp_value);
- }
-
- return 0;
-}
-
git.samba.org / sfrench / cifs-2.6.git / blobdiff