[deliverable/linux.git] / net / ieee80211 / softmac / ieee80211softmac_io.c

/* 
 * 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 = kmalloc(size, GFP_ATOMIC);
	memset(data, 0, size);
	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? */
}


/*****************************************************************************
 * 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 capability Info */
	switch (mac->ieee->iw_mode) {
	case IW_MODE_INFRA:
		(*pkt)->capability = cpu_to_le16(WLAN_CAPABILITY_ESS);
		break;
	case IW_MODE_ADHOC:
		(*pkt)->capability = cpu_to_le16(WLAN_CAPABILITY_IBSS);
		break;
	case IW_MODE_AUTO:
		(*pkt)->capability = 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;
	}
	/* Need to add this
	(*pkt)->capability |= mac->ieee->short_slot ? 
			cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0;
	 */
	(*pkt)->capability |= mac->ieee->sec.level ? cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0;
	/* 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 capability Info */
	(*pkt)->capability = mac->ieee->iw_mode == IW_MODE_MASTER ? 
				cpu_to_le16(WLAN_CAPABILITY_ESS) :
				cpu_to_le16(WLAN_CAPABILITY_IBSS);
	/*
	(*pkt)->capability |= mac->ieee->short_slot ? 
			cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0;
	 */
	(*pkt)->capability |= mac->ieee->sec.level ?
			cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0;
		
	/* 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)
{
	u8 *data;
	/* Allocate Packet */
	(*pkt) = (struct ieee80211_auth *)ieee80211softmac_alloc_mgt(
		2 +		/* Auth Algorithm */
		2 +		/* Auth Transaction Seq */
		2 +		/* Status Code */
		 /* Challenge Text IE */
		mac->ieee->open_wep ? 0 : 
		1 + 1 + WLAN_AUTH_CHALLENGE_LEN
	);	
	if (unlikely((*pkt) == NULL))
		return 0;
	ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_AUTH, net->bssid, net->bssid);
		
	/* Algorithm */
	(*pkt)->algorithm = mac->ieee->open_wep ? 
		cpu_to_le16(WLAN_AUTH_OPEN) :
		cpu_to_le16(WLAN_AUTH_SHARED_KEY);
	/* Transaction */
	(*pkt)->transaction = cpu_to_le16(transaction);
	/* Status */
	(*pkt)->status = cpu_to_le16(status);
	
	data = (u8 *)(*pkt)->info_element;
	/* Challenge Text */
	if(!mac->ieee->open_wep){
		*data = MFIE_TYPE_CHALLENGE;
		data++;
		
		/* Copy the challenge in */
		// *data = challenge length
		// data += sizeof(u16);
		// memcpy(data, challenge, challenge length);
		// data += challenge length;
		
		/* Add the full size to the packet length */
	}

	/* 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;

	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));
		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, pkt_size);

	kfree(pkt);
	return 0;
}
Commit	Line	Data
370121e5 JB	1	/*
	2	* Some parts based on code from net80211
	3	* Copyright (c) 2001 Atsushi Onoe
	4	* Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. The name of the author may not be used to endorse or promote products
	16	* derived from this software without specific prior written permission.
	17	*
	18	* Alternatively, this software may be distributed under the terms of the
	19	* GNU General Public License ("GPL") version 2 as published by the Free
	20	* Software Foundation.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	23	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	24	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	25	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	26	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	27	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	28	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	29	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	30	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	31	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	32	*
	33	*/
	34
	35	#include "ieee80211softmac_priv.h"
	36
	37	/* Helper functions for inserting data into the frames */
	38
	39	/*
	40	* Adds an ESSID element to the frame
	41	*
	42	*/
	43	static u8 *
	44	ieee80211softmac_add_essid(u8 dst, struct ieee80211softmac_essid essid)
	45	{
	46	if (essid) {
	47	*dst++ = MFIE_TYPE_SSID;
	48	*dst++ = essid->len;
	49	memcpy(dst, essid->data, essid->len);
	50	return dst+essid->len;
	51	} else {
	52	*dst++ = MFIE_TYPE_SSID;
	53	*dst++ = 0;
	54	return dst;
	55	}
	56	}
	57
	58	/* Adds Supported Rates and if required Extended Rates Information Element
	59	* to the frame, ASSUMES WE HAVE A SORTED LIST OF RATES */
	60	static u8 *
	61	ieee80211softmac_frame_add_rates(u8 dst, const struct ieee80211softmac_ratesinfo r)
	62	{
	63	int cck_len, ofdm_len;
	64	*dst++ = MFIE_TYPE_RATES;
65
66	for(cck_len=0; ieee80211_is_cck_rate(r->rates[cck_len]) && (cck_len < r->count);cck_len++);
67
68	if(cck_len > IEEE80211SOFTMAC_MAX_RATES_LEN)
69	cck_len = IEEE80211SOFTMAC_MAX_RATES_LEN;
70	*dst++ = cck_len;
71	memcpy(dst, r->rates, cck_len);
72	dst += cck_len;
73
74	if(cck_len < r->count){
75	for (ofdm_len=0; ieee80211_is_ofdm_rate(r->rates[ofdm_len + cck_len]) && (ofdm_len + cck_len < r->count); ofdm_len++);
76	if (ofdm_len > 0) {
77	if (ofdm_len > IEEE80211SOFTMAC_MAX_EX_RATES_LEN)
78	ofdm_len = IEEE80211SOFTMAC_MAX_EX_RATES_LEN;
79	*dst++ = MFIE_TYPE_RATES_EX;
80	*dst++ = ofdm_len;
81	memcpy(dst, r->rates + cck_len, ofdm_len);
82	dst += ofdm_len;
83	}
84	}
85	return dst;
86	}
87
88	/* Allocate a management frame */
89	static u8 *
90	ieee80211softmac_alloc_mgt(u32 size)
91	{
92	u8 * data;
93
94	/* Add the header and FCS to the size */
95	size = size + IEEE80211_3ADDR_LEN;
96	if(size > IEEE80211_DATA_LEN)
97	return NULL;
98	/* Allocate the frame */
99	data = kmalloc(size, GFP_ATOMIC);
100	memset(data, 0, size);
101	return data;
102	}
103
104	/*
105	* Add a 2 Address Header
106	*/
107	static void
108	ieee80211softmac_hdr_2addr(struct ieee80211softmac_device *mac,
109	struct ieee80211_hdr_2addr header, u32 type, u8 dest)
110	{
111	/* Fill in the frame control flags */
112	header->frame_ctl = cpu_to_le16(type);
113	/* Control packets always have WEP turned off */
114	if(type > IEEE80211_STYPE_CFENDACK && type < IEEE80211_STYPE_PSPOLL)
115	header->frame_ctl \|= mac->ieee->sec.level ? cpu_to_le16(IEEE80211_FCTL_PROTECTED) : 0;
116
117	/* Fill in the duration */
118	header->duration_id = 0;
119	/* FIXME: How do I find this?
120	* calculate. But most drivers just fill in 0 (except if it's a station id of course) */
121
122	/* Fill in the Destination Address */
123	if(dest == NULL)
124	memset(header->addr1, 0xFF, ETH_ALEN);
125	else
126	memcpy(header->addr1, dest, ETH_ALEN);
127	/* Fill in the Source Address */
128	memcpy(header->addr2, mac->ieee->dev->dev_addr, ETH_ALEN);
129
130	}
131
132
133	/* Add a 3 Address Header */
134	static void
135	ieee80211softmac_hdr_3addr(struct ieee80211softmac_device *mac,
136	struct ieee80211_hdr_3addr header, u32 type, u8 dest, u8 *bssid)
137	{
138	/* This is common with 2addr, so use that instead */
139	ieee80211softmac_hdr_2addr(mac, (struct ieee80211_hdr_2addr *)header, type, dest);
140
141	/* Fill in the BSS ID */
142	if(bssid == NULL)
143	memset(header->addr3, 0xFF, ETH_ALEN);
144	else
145	memcpy(header->addr3, bssid, ETH_ALEN);
146
147	/* Fill in the sequence # */
148	/* FIXME: I need to add this to the softmac struct
149	* shouldn't the sequence number be in ieee80211? */
150	}
151
152
153	/*****************************************************************************
154	* Create Management packets
155	*****************************************************************************/
156
157	/* Creates an association request packet */
714e1a51	158	static u32
370121e5 JB	159	ieee80211softmac_assoc_req(struct ieee80211_assoc_request **pkt,
	160	struct ieee80211softmac_device mac, struct ieee80211softmac_network net)
	161	{
	162	u8 *data;
	163	(pkt) = (struct ieee80211_assoc_request )ieee80211softmac_alloc_mgt(
	164	2 + /* Capability Info */
	165	2 + /* Listen Interval */
	166	/* SSID IE */
	167	1 + 1 + IW_ESSID_MAX_SIZE +
	168	/* Rates IE */
	169	1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
	170	/* Extended Rates IE */
	171	1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN +
	172	/* WPA IE if present */
	173	mac->wpa.IElen
	174	/* Other IE's? Optional?
	175	* Yeah, probably need an extra IE parameter -- lots of vendors like to
	176	* fill in their own IEs */
	177	);
	178	if (unlikely((*pkt) == NULL))
	179	return 0;
	180	ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_ASSOC_REQ, net->bssid, net->bssid);
	181
	182	/* Fill in capability Info */
68970ce6	183	switch (mac->ieee->iw_mode) {
	184	case IW_MODE_INFRA:
	185	(*pkt)->capability = cpu_to_le16(WLAN_CAPABILITY_ESS);
	186	break;
	187	case IW_MODE_ADHOC:
	188	(*pkt)->capability = cpu_to_le16(WLAN_CAPABILITY_IBSS);
	189	break;
	190	case IW_MODE_AUTO:
	191	(*pkt)->capability = net->capabilities & (WLAN_CAPABILITY_ESS\|WLAN_CAPABILITY_IBSS);
	192	break;
	193	default:
	194	/* bleh. we don't ever go to these modes */
	195	printk(KERN_ERR PFX "invalid iw_mode!\n");
	196	break;
	197	}
370121e5 JB	198	/* Need to add this
	199	(*pkt)->capability \|= mac->ieee->short_slot ?
	200	cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0;
	201	*/
	202	(*pkt)->capability \|= mac->ieee->sec.level ? cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0;
	203	/* Fill in Listen Interval (?) */
	204	(*pkt)->listen_interval = cpu_to_le16(10);
	205
	206	data = (u8 )(pkt)->info_element;
	207	/* Add SSID */
	208	data = ieee80211softmac_add_essid(data, &net->essid);
	209	/* Add Rates */
	210	data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
	211	/* Add WPA IE */
	212	if (mac->wpa.IElen && mac->wpa.IE) {
	213	memcpy(data, mac->wpa.IE, mac->wpa.IElen);
	214	data += mac->wpa.IElen;
	215	}
	216	/* Return the number of used bytes */
	217	return (data - (u8)(pkt));
	218	}
	219
	220	/* Create a reassociation request packet */
714e1a51	221	static u32
370121e5 JB	222	ieee80211softmac_reassoc_req(struct ieee80211_reassoc_request **pkt,
	223	struct ieee80211softmac_device mac, struct ieee80211softmac_network net)
	224	{
	225	u8 *data;
	226	(pkt) = (struct ieee80211_reassoc_request )ieee80211softmac_alloc_mgt(
	227	2 + /* Capability Info */
	228	2 + /* Listen Interval */
	229	ETH_ALEN + /* AP MAC */
	230	/* SSID IE */
	231	1 + 1 + IW_ESSID_MAX_SIZE +
	232	/* Rates IE */
	233	1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
	234	/* Extended Rates IE */
	235	1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN
	236	/* Other IE's? */
	237	);
	238	if (unlikely((*pkt) == NULL))
	239	return 0;
	240	ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_REASSOC_REQ, net->bssid, net->bssid);
	241
	242	/* Fill in capability Info */
	243	(*pkt)->capability = mac->ieee->iw_mode == IW_MODE_MASTER ?
	244	cpu_to_le16(WLAN_CAPABILITY_ESS) :
	245	cpu_to_le16(WLAN_CAPABILITY_IBSS);
	246	/*
	247	(*pkt)->capability \|= mac->ieee->short_slot ?
	248	cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0;
	249	*/
	250	(*pkt)->capability \|= mac->ieee->sec.level ?
	251	cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0;
	252
	253	/* Fill in Listen Interval (?) */
	254	(*pkt)->listen_interval = cpu_to_le16(10);
	255	/* Fill in the current AP MAC */
	256	memcpy((*pkt)->current_ap, mac->ieee->bssid, ETH_ALEN);
	257
	258	data = (u8 )(pkt)->info_element;
	259	/* Add SSID */
	260	data = ieee80211softmac_add_essid(data, &net->essid);
	261	/* Add Rates */
	262	data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
	263	/* Return packet size */
	264	return (data - (u8 )(pkt));
	265	}
	266
	267	/* Create an authentication packet */
714e1a51	268	static u32
370121e5 JB	269	ieee80211softmac_auth(struct ieee80211_auth **pkt,
	270	struct ieee80211softmac_device mac, struct ieee80211softmac_network net,
	271	u16 transaction, u16 status)
	272	{
	273	u8 *data;
	274	/* Allocate Packet */
	275	(pkt) = (struct ieee80211_auth )ieee80211softmac_alloc_mgt(
	276	2 + /* Auth Algorithm */
	277	2 + /* Auth Transaction Seq */
	278	2 + /* Status Code */
	279	/* Challenge Text IE */
	280	mac->ieee->open_wep ? 0 :
	281	1 + 1 + WLAN_AUTH_CHALLENGE_LEN
	282	);
	283	if (unlikely((*pkt) == NULL))
	284	return 0;
	285	ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_AUTH, net->bssid, net->bssid);
	286
	287	/* Algorithm */
	288	(*pkt)->algorithm = mac->ieee->open_wep ?
	289	cpu_to_le16(WLAN_AUTH_OPEN) :
	290	cpu_to_le16(WLAN_AUTH_SHARED_KEY);
	291	/* Transaction */
	292	(*pkt)->transaction = cpu_to_le16(transaction);
	293	/* Status */
	294	(*pkt)->status = cpu_to_le16(status);
	295
	296	data = (u8 )(pkt)->info_element;
	297	/* Challenge Text */
	298	if(!mac->ieee->open_wep){
	299	*data = MFIE_TYPE_CHALLENGE;
	300	data++;
	301
	302	/* Copy the challenge in */
	303	// *data = challenge length
	304	// data += sizeof(u16);
	305	// memcpy(data, challenge, challenge length);
	306	// data += challenge length;
	307
	308	/* Add the full size to the packet length */
	309	}
	310
	311	/* Return the packet size */
	312	return (data - (u8 )(pkt));
	313	}
	314
	315	/* Create a disassocation or deauthentication packet */
714e1a51	316	static u32
370121e5 JB	317	ieee80211softmac_disassoc_deauth(struct ieee80211_disassoc **pkt,
	318	struct ieee80211softmac_device mac, struct ieee80211softmac_network net,
	319	u16 type, u16 reason)
	320	{
	321	/* Allocate Packet */
	322	(pkt) = (struct ieee80211_disassoc )ieee80211softmac_alloc_mgt(2);
bba52d5e	323	if (unlikely((*pkt) == NULL))
370121e5 JB	324	return 0;
	325	ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), type, net->bssid, net->bssid);
	326	/* Reason */
	327	(*pkt)->reason = cpu_to_le16(reason);
	328	/* Return the packet size */
	329	return (2 + IEEE80211_3ADDR_LEN);
	330	}
	331
	332	/* Create a probe request packet */
714e1a51	333	static u32
370121e5 JB	334	ieee80211softmac_probe_req(struct ieee80211_probe_request **pkt,
	335	struct ieee80211softmac_device mac, struct ieee80211softmac_essid essid)
	336	{
	337	u8 *data;
	338	/* Allocate Packet */
	339	(pkt) = (struct ieee80211_probe_request )ieee80211softmac_alloc_mgt(
	340	/* SSID of requested network */
	341	1 + 1 + IW_ESSID_MAX_SIZE +
	342	/* Rates IE */
	343	1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
	344	/* Extended Rates IE */
	345	1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN
	346	);
	347	if (unlikely((*pkt) == NULL))
	348	return 0;
	349	ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_REQ, NULL, NULL);
	350
	351	data = (u8 )(pkt)->info_element;
	352	/* Add ESSID (can be NULL) */
	353	data = ieee80211softmac_add_essid(data, essid);
	354	/* Add Rates */
	355	data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
	356	/* Return packet size */
	357	return (data - (u8 )(pkt));
	358	}
	359
	360	/* Create a probe response packet */
	361	/* FIXME: Not complete */
714e1a51	362	static u32
370121e5 JB	363	ieee80211softmac_probe_resp(struct ieee80211_probe_response **pkt,
	364	struct ieee80211softmac_device mac, struct ieee80211softmac_network net)
	365	{
	366	u8 *data;
	367	/* Allocate Packet */
	368	(pkt) = (struct ieee80211_probe_response )ieee80211softmac_alloc_mgt(
	369	8 + /* Timestamp */
	370	2 + /* Beacon Interval */
	371	2 + /* Capability Info */
	372	/* SSID IE */
	373	1 + 1 + IW_ESSID_MAX_SIZE +
	374	7 + /* FH Parameter Set */
	375	2 + /* DS Parameter Set */
	376	8 + /* CF Parameter Set */
	377	4 /* IBSS Parameter Set */
	378	);
	379	if (unlikely((*pkt) == NULL))
	380	return 0;
	381	ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_RESP, net->bssid, net->bssid);
	382	data = (u8 )(pkt)->info_element;
	383
	384	/* Return the packet size */
	385	return (data - (u8 )(pkt));
	386	}
	387
	388
	389	/* Sends a manangement packet
	390	* FIXME: document the use of the arg parameter
	391	* for _AUTH: (transaction #) \| (status << 16)
	392	*/
	393	int
	394	ieee80211softmac_send_mgt_frame(struct ieee80211softmac_device *mac,
	395	void *ptrarg, u32 type, u32 arg)
	396	{
	397	void *pkt = NULL;
	398	u32 pkt_size = 0;
	399
	400	switch(type) {
	401	case IEEE80211_STYPE_ASSOC_REQ:
	402	pkt_size = ieee80211softmac_assoc_req((struct ieee80211_assoc_request *)(&pkt), mac, (struct ieee80211softmac_network )ptrarg);
	403	break;
	404	case IEEE80211_STYPE_REASSOC_REQ:
	405	pkt_size = ieee80211softmac_reassoc_req((struct ieee80211_reassoc_request *)(&pkt), mac, (struct ieee80211softmac_network )ptrarg);
	406	break;
	407	case IEEE80211_STYPE_AUTH:
	408	pkt_size = ieee80211softmac_auth((struct ieee80211_auth *)(&pkt), mac, (struct ieee80211softmac_network )ptrarg, (u16)(arg & 0xFFFF), (u16) (arg >> 16));
	409	break;
	410	case IEEE80211_STYPE_DISASSOC:
	411	case IEEE80211_STYPE_DEAUTH:
	412	pkt_size = ieee80211softmac_disassoc_deauth((struct ieee80211_disassoc *)(&pkt), mac, (struct ieee80211softmac_network )ptrarg, type, (u16)(arg & 0xFFFF));
	413	break;
	414	case IEEE80211_STYPE_PROBE_REQ:
	415	pkt_size = ieee80211softmac_probe_req((struct ieee80211_probe_request *)(&pkt), mac, (struct ieee80211softmac_essid )ptrarg);
	416	break;
	417	case IEEE80211_STYPE_PROBE_RESP:
	418	pkt_size = ieee80211softmac_probe_resp((struct ieee80211_probe_response *)(&pkt), mac, (struct ieee80211softmac_network )ptrarg);
	419	break;
	420	default:
	421	printkl(KERN_DEBUG PFX "Unsupported Management Frame type: %i\n", type);
	422	return -EINVAL;
	423	};
	424
	425	if(pkt_size == 0 \|\| pkt == NULL) {
	426	printkl(KERN_DEBUG PFX "Error, packet is nonexistant or 0 length\n");
427	return -ENOMEM;
428	}
429
430	/* Send the packet to the ieee80211 layer for tx */
431	/* we defined softmac->mgmt_xmit for this. Should we keep it
432	* as it is (that means we'd need to wrap this into a txb),
433	* modify the prototype (so it matches this function),
434	* or get rid of it alltogether?
435	* Does this work for you now?
436	*/
437	ieee80211_tx_frame(mac->ieee, (struct ieee80211_hdr *)pkt, pkt_size);
438
439	kfree(pkt);
440	return 0;
441	}