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freebsd-dev/sys/dev/wi/wi_hostap.c
Warner Losh 1bd2b5b4cd Integrate the hostap stuff that Thomas Skibo <skibo@packbell.net> 
wrote.  This code was for 4.5-release, so I've ported it to -current
and made a few minor tweaks.  The biggest non-style tweak was to not
make access point the default.

More changes will be needed to get this actually working, but I wanted
to get a relatively pure baseline.  This doesn't seem to break what
works now.
2002-04-11 07:21:16 +00:00

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/*
* Copyright (c) 2002
* Thomas Skibo <skibo@pacbell.net>. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Thomas Skibo.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Thomas Skibo AND CONTRIBUTORS ``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 Thomas Skibo OR HIS DRINKING PALS
* 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.
*
* $FreeBSD$
*/
/* This is experimental Host AP software for Prism 2 802.11b interfaces.
*
* Much of this is based upon the "Linux Host AP driver Host AP driver
* for Intersil Prism2" by Jouni Malinen <jkm@ssh.com> or <jkmaline@cc.hut.fi>.
*/
#ifdef WI_HOSTAP
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/ucred.h>
#include <sys/socket.h>
#include <sys/module.h>
#include <sys/queue.h>
#include <sys/bus.h>
#include <sys/syslog.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/clock.h>
#include <machine/md_var.h>
#include <machine/bus_pio.h>
#include <sys/rman.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_ieee80211.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#include <dev/wi/if_wavelan_ieee.h>
#ifdef WI_HOSTAP
#include <dev/wi/wi_hostap.h>
#endif
#include <dev/wi/if_wivar.h>
#include <dev/wi/if_wireg.h>
MALLOC_DEFINE(M_HAP_STA, "hostap_sta", "if_wi host AP mode station entry");
/*
* take_hword()
*
* Used for parsing management frames. The pkt pointer and length
* variables are updated after the value is removed.
*/
static __inline u_int16_t
take_hword(caddr_t *ppkt, int *plen)
{
u_int16_t s = le16toh(* (u_int16_t *) *ppkt);
*ppkt += sizeof(u_int16_t);
*plen -= sizeof(u_int16_t);
return s;
}
/*
* take_tlv()
*
* Parse out TLV element from a packet, check for underflow of packet
* or overflow of buffer, update pkt/len.
*/
static int
take_tlv(caddr_t *ppkt, int *plen, int id_expect, void *dst, int maxlen)
{
u_int8_t id, len;
if (*plen < 2)
return -1;
id = ((u_int8_t *)*ppkt)[0];
len = ((u_int8_t *)*ppkt)[1];
if (id != id_expect || *plen < len+2 || maxlen < len)
return -1;
bcopy(*ppkt+2, dst, len);
*plen -= 2+len;
*ppkt += 2+len;
return len;
}
/*
* put_hword()
* Put half-word element into management frames.
*/
static __inline void
put_hword(caddr_t *ppkt, u_int16_t s)
{
* (u_int16_t *) *ppkt = htole16(s);
*ppkt += sizeof(u_int16_t);
}
/*
* put_tlv()
* Put TLV elements into management frames.
*/
static void
put_tlv(caddr_t *ppkt, u_int8_t id, void *src, u_int8_t len)
{
(*ppkt)[0] = id;
(*ppkt)[1] = len;
bcopy(src, (*ppkt)+2, len);
*ppkt += 2+len;
}
static int
put_rates(caddr_t *ppkt, u_int16_t rates)
{
int len = 0;
u_int8_t ratebuf[8];
if (rates & WI_SUPPRATES_1M)
ratebuf[len++] = 0x82;
if (rates & WI_SUPPRATES_2M)
ratebuf[len++] = 0x84;
if (rates & WI_SUPPRATES_5M)
ratebuf[len++] = 0x8b;
if (rates & WI_SUPPRATES_11M)
ratebuf[len++] = 0x96;
put_tlv(ppkt, IEEE80211_ELEMID_RATES, ratebuf, len);
return len;
}
/*
* wihap_init()
*
* Initialize host AP data structures. Called even if port type is
* not AP.
*/
void
wihap_init(struct wi_softc *sc)
{
int i;
struct wihap_info *whi = &sc->wi_hostap_info;
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_init: sc=0x%x whi=0x%x\n", (int)sc, (int)whi);
bzero(whi, sizeof(struct wihap_info));
if (sc->wi_ptype != WI_PORTTYPE_AP)
return;
whi->apflags = WIHAPFL_ACTIVE;
LIST_INIT(&whi->sta_list);
for (i=0; i<WI_STA_HASH_SIZE; i++)
LIST_INIT(&whi->sta_hash[i]);
whi->inactivity_time = WIHAP_DFLT_INACTIVITY_TIME;
whi->hostap_ch = timeout(wihap_timer, sc, hz * WIHAP_INTERVAL);
}
/*
* wihap_sta_disassoc()
*
* Send a disassociation frame to a specified station.
*/
static void
wihap_sta_disassoc(struct wi_softc *sc, u_int8_t sta_addr[],
u_int16_t reason)
{
struct wi_80211_hdr *resp_hdr;
caddr_t pkt;
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("Sending disassoc to sta %6D\n", sta_addr, ":");
/* Send disassoc packet. */
resp_hdr = (struct wi_80211_hdr *) sc->wi_txbuf;
bzero(resp_hdr, sizeof(struct wi_80211_hdr));
resp_hdr->frame_ctl = WI_FTYPE_MGMT | WI_STYPE_MGMT_DISAS;
pkt = sc->wi_txbuf + sizeof(struct wi_80211_hdr);
bcopy(sta_addr, resp_hdr->addr1, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr2, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr3, ETHER_ADDR_LEN);
put_hword(&pkt, reason);
wi_mgmt_xmit(sc, sc->wi_txbuf, 2+sizeof(struct wi_80211_hdr));
}
/*
* wihap_sta_deauth()
*
* Send a deauthentication message to a specified station.
*/
static void
wihap_sta_deauth(struct wi_softc *sc, u_int8_t sta_addr[],
u_int16_t reason)
{
struct wi_80211_hdr *resp_hdr;
caddr_t pkt;
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("Sending deauth to sta %6D\n", sta_addr, ":");
/* Send deauth packet. */
resp_hdr = (struct wi_80211_hdr *) sc->wi_txbuf;
bzero(resp_hdr, sizeof(struct wi_80211_hdr));
resp_hdr->frame_ctl = htole16(WI_FTYPE_MGMT | WI_STYPE_MGMT_DEAUTH);
pkt = sc->wi_txbuf + sizeof(struct wi_80211_hdr);
bcopy(sta_addr, resp_hdr->addr1, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr2, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr3, ETHER_ADDR_LEN);
put_hword(&pkt, reason);
wi_mgmt_xmit(sc, sc->wi_txbuf, 2+sizeof(struct wi_80211_hdr));
}
/*
* wihap_shutdown()
*
* Disassociate all stations and free up data structures.
*/
void
wihap_shutdown(struct wi_softc *sc)
{
struct wihap_info *whi = &sc->wi_hostap_info;
struct wihap_sta_info *sta, *next;
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_shutdown: sc=0x%x whi=0x%x\n",
(int)sc, (int)whi);
if (!(whi->apflags & WIHAPFL_ACTIVE))
return;
/*
* XXX: I read somewhere you can deauth all the stations with
* a single broadcast. Maybe try that someday.
*/
sta = LIST_FIRST(&whi->sta_list);
while (sta) {
if (!sc->wi_gone) {
/* Disassociate station. */
if (sta->flags & WI_SIFLAGS_ASSOC)
wihap_sta_disassoc(sc, sta->addr,
IEEE80211_REASON_ASSOC_LEAVE);
/* Deauth station. */
if (sta->flags & WI_SIFLAGS_AUTHEN)
wihap_sta_deauth(sc, sta->addr,
IEEE80211_REASON_AUTH_LEAVE);
}
/* Delete the structure. */
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_shutdown: FREE(sta=0x%x)\n", (int) sta);
next = LIST_NEXT(sta, list);
FREE(sta, M_HAP_STA);
sta = next;
}
untimeout(wihap_timer, sc, whi->hostap_ch);
whi->apflags = 0;
}
/*
* sta_hash_func()
* Hash function for finding stations from ethernet address.
*/
static __inline int
sta_hash_func(u_int8_t addr[])
{
return ((addr[3] + addr[4] + addr[5]) % WI_STA_HASH_SIZE);
}
/*
* addr_cmp():
* Maybe this is a faster way to compare addresses?
*/
static __inline int
addr_cmp(u_int8_t a[], u_int8_t b[])
{
return (*(u_int16_t *)(a+4) == *(u_int16_t *)(b+4) &&
*(u_int32_t *)a == *(u_int32_t *)b);
}
/*
* wihap_sta_delete()
* Delete a single station and free up its data structure.
*/
static void
wihap_sta_delete(struct wihap_info *whi, struct wihap_sta_info *sta)
{
int i = sta->asid - 0xc001;
whi->asid_inuse_mask[i>>4] &= ~(1ul<<(i&0xf));
LIST_REMOVE(sta, list);
LIST_REMOVE(sta, hash);
FREE(sta, M_HAP_STA);
whi->n_stations--;
}
/*
* wihap_sta_alloc()
*
* Create a new station data structure and put it in the list
* and hash table.
*/
static struct wihap_sta_info *
wihap_sta_alloc(struct wihap_info *whi, u_int8_t *addr)
{
int i;
int hash = sta_hash_func(addr);
struct wihap_sta_info *sta;
/* Allocate structure. */
MALLOC(sta, struct wihap_sta_info *, sizeof(struct wihap_sta_info),
M_HAP_STA, M_NOWAIT);
if (sta == NULL)
return(NULL);
bzero(sta, sizeof(struct wihap_sta_info));
/* Allocate an ASID. */
i=hash<<4;
while (whi->asid_inuse_mask[i>>4] & (1ul<<(i&0xf)))
i = (i==(WI_STA_HASH_SIZE<<4)-1) ? 0 : (i+1);
whi->asid_inuse_mask[i>>4] |= (1ul<<(i&0xf));
sta->asid = 0xc001+i;
/* Insert in list and hash list. */
LIST_INSERT_HEAD(&whi->sta_list, sta, list);
LIST_INSERT_HEAD(&whi->sta_hash[hash], sta, hash);
whi->n_stations++;
bcopy(addr, &sta->addr, ETHER_ADDR_LEN);
sta->inactivity_timer = whi->inactivity_time;
return(sta);
}
/*
* wihap_sta_find()
*
* Find station structure given address.
*/
static struct wihap_sta_info *
wihap_sta_find(struct wihap_info *whi, u_int8_t *addr)
{
int i;
struct wihap_sta_info *sta;
i = sta_hash_func(addr);
LIST_FOREACH(sta, &whi->sta_hash[i], hash)
if (addr_cmp(addr,sta->addr))
return sta;
return(NULL);
}
/*
* wihap_timer()
*
* Called every WIHAP_INTERVAL seconds. Look for inactive
* stations and disassociate them.
*/
void
wihap_timer(void *xsc)
{
int s;
struct wihap_sta_info *sta, *next;
struct wi_softc *sc = (struct wi_softc *) xsc;
struct wihap_info *whi = &sc->wi_hostap_info;
s = splimp();
sta = LIST_FIRST(&whi->sta_list);
while (sta) {
/* Grab next station now just in case we delete it. */
next = LIST_NEXT(sta, list);
if (sta->inactivity_timer >= 0) {
if (--sta->inactivity_timer == 0) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_timer: disassoc due to "
"inactivity: %6D\n",
sta->addr, ":");
if (sta->flags & WI_SIFLAGS_ASSOC) {
/* Disassoc station. */
wihap_sta_disassoc(sc, sta->addr,
IEEE80211_REASON_ASSOC_EXPIRE);
sta->flags &= ~WI_SIFLAGS_ASSOC;
}
}
else if (sta->inactivity_timer == -1) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_timer: deauth due to "
"inactivity: %6D\n",
sta->addr, ":");
if (sta->flags & WI_SIFLAGS_AUTHEN) {
/* Deauthenticate station. */
wihap_sta_deauth(sc, sta->addr,
IEEE80211_REASON_AUTH_EXPIRE);
sta->flags &= ~WI_SIFLAGS_AUTHEN;
}
/* Delete the station if it's not permanent. */
if (!(sta->flags & WI_SIFLAGS_PERM))
wihap_sta_delete(whi, sta);
}
}
sta = next;
}
splx(s);
whi->hostap_ch = timeout(wihap_timer, sc, hz * WIHAP_INTERVAL);
}
static int
wihap_check_rates(struct wi_softc *sc, struct wihap_sta_info *sta,
u_int8_t rates[], int rates_len)
{
int i;
sta->rates = 0;
sta->tx_max_rate = 0;
for (i=0; i<rates_len; i++)
switch (rates[i] & 0x7f) {
case 0x02:
sta->rates |= WI_SUPPRATES_1M;
break;
case 0x04:
sta->rates |= WI_SUPPRATES_2M;
if (sta->tx_max_rate<1)
sta->tx_max_rate = 1;
break;
case 0x0b:
sta->rates |= WI_SUPPRATES_5M;
if (sta->tx_max_rate<2)
sta->tx_max_rate = 2;
break;
case 0x16:
sta->rates |= WI_SUPPRATES_11M;
sta->tx_max_rate = 3;
break;
}
sta->rates &= sc->wi_supprates;
sta->tx_curr_rate = sta->tx_max_rate;
return (sta->rates == 0 ? -1 : 0);
}
/*
* wihap_auth_req()
*
* Handle incoming authentication request. Only handle OPEN
* requests.
*/
static void
wihap_auth_req(struct wi_softc *sc, struct wi_frame *rxfrm,
caddr_t pkt, int len)
{
struct wihap_info *whi = &sc->wi_hostap_info;
struct wihap_sta_info *sta;
u_int16_t algo;
u_int16_t seq;
u_int16_t status;
int challenge_len;
u_int8_t challenge[128];
struct wi_80211_hdr *resp_hdr;
if (len<6)
return;
/* Break open packet. */
algo = take_hword(&pkt, &len);
seq = take_hword(&pkt, &len);
status = take_hword(&pkt, &len);
challenge_len=0;
if (len>0 && (challenge_len=take_tlv(&pkt, &len,
IEEE80211_ELEMID_CHALLENGE,
challenge, sizeof(challenge)))<0)
return;
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_auth_req: from station: %6D\n",
rxfrm->wi_addr2, ":");
switch (algo) {
case IEEE80211_AUTH_ALG_OPEN:
if (seq != 1) {
status = IEEE80211_STATUS_SEQUENCE;
goto fail;
}
challenge_len=0;
break;
case IEEE80211_AUTH_ALG_SHARED:
/* NOT YET */
default:
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_auth_req: algorithm unsupported: %d\n",
algo);
status = IEEE80211_STATUS_ALG;
goto fail;
}
sta = wihap_sta_find(whi, rxfrm->wi_addr2);
if (sta == NULL) {
/* Are we allowing new stations?
*/
if (whi->apflags & WIHAPFL_MAC_FILT) {
status = IEEE80211_STATUS_OTHER; /* XXX */
goto fail;
}
/* Check for too many stations.
*/
if (whi->n_stations >= WIHAP_MAX_STATIONS) {
status = IEEE80211_STATUS_TOO_MANY_STATIONS;
goto fail;
}
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_auth_req: new station\n");
/* Create new station. */
sta = wihap_sta_alloc(whi, rxfrm->wi_addr2);
if (sta == NULL) {
/* Out of memory! */
status = IEEE80211_STATUS_TOO_MANY_STATIONS;
goto fail;
}
}
sta->flags |= WI_SIFLAGS_AUTHEN;
sta->inactivity_timer = whi->inactivity_time;
status = IEEE80211_STATUS_SUCCESS;
fail:
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_auth_req: returns status=0x%x\n", status);
/* Send response. */
resp_hdr = (struct wi_80211_hdr *) sc->wi_txbuf;
bzero(resp_hdr, sizeof(struct wi_80211_hdr));
resp_hdr->frame_ctl = WI_FTYPE_MGMT | WI_STYPE_MGMT_AUTH;
pkt = sc->wi_txbuf + sizeof(struct wi_80211_hdr);
bcopy(rxfrm->wi_addr2, resp_hdr->addr1, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr2, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr3, ETHER_ADDR_LEN);
put_hword(&pkt, algo);
put_hword(&pkt, 2);
put_hword(&pkt, status);
if (challenge_len>0)
put_tlv(&pkt, IEEE80211_ELEMID_CHALLENGE,
challenge, challenge_len);
wi_mgmt_xmit(sc, sc->wi_txbuf,
6 + sizeof(struct wi_80211_hdr) +
(challenge_len>0 ? challenge_len+2 : 0) );
}
/*
* wihap_assoc_req()
*
* Handle incoming association and reassociation requests.
*/
static void
wihap_assoc_req(struct wi_softc *sc, struct wi_frame *rxfrm,
caddr_t pkt, int len)
{
struct wihap_info *whi = &sc->wi_hostap_info;
struct wihap_sta_info *sta;
struct wi_80211_hdr *resp_hdr;
u_int16_t capinfo;
u_int16_t lstintvl;
u_int8_t rates[8];
int rates_len;
int ssid_len;
char ssid[33];
u_int16_t status;
u_int16_t asid = 0;
if (len<8)
return;
/* Pull out request parameters. */
capinfo = take_hword(&pkt, &len);
lstintvl = take_hword(&pkt, &len);
if ((ssid_len=take_tlv(&pkt, &len, IEEE80211_ELEMID_SSID,
ssid, sizeof(ssid)-1))<0)
return;
ssid[ssid_len] = '\0';
if ((rates_len=take_tlv(&pkt, &len, IEEE80211_ELEMID_RATES,
rates, sizeof(rates)))<0)
return;
if ((rxfrm->wi_frame_ctl & WI_FCTL_STYPE) == WI_STYPE_MGMT_REASREQ) {
/* Reassociation Request--
* Current AP. (Ignore?)
*/
if (len<6)
return;
}
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_assoc_req: from station %6D\n",
rxfrm->wi_addr2, ":");
/* If SSID doesn't match, simply drop. */
if (strcmp(sc->wi_net_name, ssid) != 0) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_assoc_req: bad ssid: '%s'\n", ssid);
return;
}
/* Is this station authenticated yet? */
sta = wihap_sta_find(whi, rxfrm->wi_addr2);
if (sta == NULL || !(sta->flags & WI_SIFLAGS_AUTHEN)) {
wihap_sta_deauth(sc, rxfrm->wi_addr2,
IEEE80211_REASON_NOT_AUTHED);
return;
}
/* Check capinfo.
* Check for ESS, not IBSS.
* Check WEP/PRIVACY flags match. XXX: WEP doesn't work for host AP.
* Refuse stations requesting to be put on CF-polling list.
*/
if ((capinfo & (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) !=
IEEE80211_CAPINFO_ESS ||
(sc->wi_use_wep && !(capinfo & IEEE80211_CAPINFO_PRIVACY)) ||
(!sc->wi_use_wep && (capinfo & IEEE80211_CAPINFO_PRIVACY)) ||
(capinfo & (IEEE80211_CAPINFO_CF_POLLABLE|
IEEE80211_CAPINFO_CF_POLLREQ)) ==
IEEE80211_CAPINFO_CF_POLLABLE) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_assoc_req: capinfo mismatch: "
"capinfo=0x%x\n", capinfo);
status = IEEE80211_STATUS_CAPINFO;
goto fail;
}
sta->capinfo = capinfo;
/* Check supported rates against ours. */
if (wihap_check_rates(sc, sta, rates, rates_len)<0) {
status = IEEE80211_STATUS_RATES;
goto fail;
}
/* Use ASID is allocated by whi_sta_alloc(). */
asid = sta->asid;
if (sta->flags & WI_SIFLAGS_ASSOC) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_assoc_req: already assoc'ed?\n");
}
sta->flags |= WI_SIFLAGS_ASSOC;
sta->inactivity_timer = whi->inactivity_time;
status = IEEE80211_STATUS_SUCCESS;
fail:
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_assoc_req: returns status=0x%x\n", status);
/* Send response. */
resp_hdr = (struct wi_80211_hdr *) sc->wi_txbuf;
bzero(resp_hdr, sizeof(struct wi_80211_hdr));
resp_hdr->frame_ctl = WI_FTYPE_MGMT | WI_STYPE_MGMT_ASRESP;
pkt = sc->wi_txbuf + sizeof(struct wi_80211_hdr);
bcopy(rxfrm->wi_addr2, resp_hdr->addr1, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr2, ETHER_ADDR_LEN);
bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr3, ETHER_ADDR_LEN);
put_hword(&pkt, capinfo);
put_hword(&pkt, status);
put_hword(&pkt, asid);
rates_len=put_rates(&pkt, sc->wi_supprates);
wi_mgmt_xmit(sc, sc->wi_txbuf,
8+rates_len+sizeof(struct wi_80211_hdr));
}
/*
* wihap_deauth_req()
*
* Handle deauthentication requests. Delete the station.
*/
static void
wihap_deauth_req(struct wi_softc *sc, struct wi_frame *rxfrm,
caddr_t pkt, int len)
{
struct wihap_info *whi = &sc->wi_hostap_info;
struct wihap_sta_info *sta;
u_int16_t reason;
if (len<2)
return;
reason = take_hword(&pkt, &len);
sta = wihap_sta_find(whi, rxfrm->wi_addr2);
if (sta == NULL) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_deauth_req: unknown station: 6D\n",
rxfrm->wi_addr2, ":");
}
else
wihap_sta_delete(whi, sta);
}
/*
* wihap_disassoc_req()
*
* Handle disassociation requests. Just reset the assoc flag.
* We'll free up the station resources when we get a deauth
* request or when it times out.
*/
static void
wihap_disassoc_req(struct wi_softc *sc, struct wi_frame *rxfrm,
caddr_t pkt, int len)
{
struct wihap_info *whi = &sc->wi_hostap_info;
struct wihap_sta_info *sta;
u_int16_t reason;
if (len<2)
return;
reason = take_hword(&pkt, &len);
sta = wihap_sta_find(whi, rxfrm->wi_addr2);
if (sta == NULL) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("wihap_disassoc_req: unknown station: 6D\n",
rxfrm->wi_addr2, ":");
}
else if (!(sta->flags & WI_SIFLAGS_AUTHEN)) {
/* If station is not authenticated, send deauthentication
* frame.
*/
wihap_sta_deauth(sc, rxfrm->wi_addr2,
IEEE80211_REASON_NOT_AUTHED);
return;
}
else
sta->flags &= ~WI_SIFLAGS_ASSOC;
}
/*
* wihap_debug_frame_type()
*
* Print out frame type. Used in early debugging.
*/
static void
wihap_debug_frame_type(struct wi_frame *rxfrm)
{
printf("wihap_mgmt_input: len=%d ", rxfrm->wi_dat_len);
if ((le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_FTYPE) == WI_FTYPE_MGMT) {
printf("MGMT: ");
switch (le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_STYPE) {
case WI_STYPE_MGMT_ASREQ:
printf("assoc req: \n");
break;
case WI_STYPE_MGMT_ASRESP:
printf("assoc resp: \n");
break;
case WI_STYPE_MGMT_REASREQ:
printf("reassoc req: \n");
break;
case WI_STYPE_MGMT_REASRESP:
printf("reassoc resp: \n");
break;
case WI_STYPE_MGMT_PROBEREQ:
printf("probe req: \n");
break;
case WI_STYPE_MGMT_PROBERESP:
printf("probe resp: \n");
break;
case WI_STYPE_MGMT_BEACON:
printf("beacon: \n");
break;
case WI_STYPE_MGMT_ATIM:
printf("ann traf ind \n");
break;
case WI_STYPE_MGMT_DISAS:
printf("disassociation: \n");
break;
case WI_STYPE_MGMT_AUTH:
printf("auth: \n");
break;
case WI_STYPE_MGMT_DEAUTH:
printf("deauth: \n");
break;
default:
printf("unknown (stype=0x%x)\n",
le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_STYPE);
}
}
else {
printf("ftype=0x%x (ctl=0x%x)\n",
le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_FTYPE,
le16toh(rxfrm->wi_frame_ctl));
}
}
/*
* wihap_mgmt_input:
*
* Called for each management frame received in host ap mode.
* wihap_mgmt_input() is expected to free the mbuf.
*/
void
wihap_mgmt_input(struct wi_softc *sc, struct wi_frame *rxfrm, struct mbuf *m)
{
caddr_t pkt;
int len;
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
wihap_debug_frame_type(rxfrm);
pkt = mtod(m, caddr_t) + WI_802_11_OFFSET_RAW;
len = m->m_len - WI_802_11_OFFSET_RAW;
if ((rxfrm->wi_frame_ctl & WI_FCTL_FTYPE) == WI_FTYPE_MGMT) {
switch (le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_STYPE) {
case WI_STYPE_MGMT_ASREQ:
wihap_assoc_req(sc, rxfrm, pkt, len);
break;
case WI_STYPE_MGMT_ASRESP:
break;
case WI_STYPE_MGMT_REASREQ:
wihap_assoc_req(sc, rxfrm, pkt, len);
break;
case WI_STYPE_MGMT_REASRESP:
break;
case WI_STYPE_MGMT_PROBEREQ:
break;
case WI_STYPE_MGMT_PROBERESP:
break;
case WI_STYPE_MGMT_BEACON:
break;
case WI_STYPE_MGMT_ATIM:
break;
case WI_STYPE_MGMT_DISAS:
wihap_disassoc_req(sc, rxfrm, pkt, len);
break;
case WI_STYPE_MGMT_AUTH:
wihap_auth_req(sc, rxfrm, pkt, len);
break;
case WI_STYPE_MGMT_DEAUTH:
wihap_deauth_req(sc, rxfrm, pkt, len);
break;
}
}
m_freem(m);
}
/*
* wihap_sta_is_assoc()
*
* Determine if a station is assoc'ed. Update its activity
* counter as a side-effect.
*/
static int
wihap_sta_is_assoc(struct wihap_info *whi, u_int8_t addr[])
{
struct wihap_sta_info *sta;
sta = wihap_sta_find(whi, addr);
if (sta!=NULL && (sta->flags & WI_SIFLAGS_ASSOC)) {
/* Keep it active. */
sta->inactivity_timer = whi->inactivity_time;
return(1);
}
else
return(0);
}
/*
* wihap_check_tx()
*
* Determine if a station is assoc'ed, get its tx rate, and update
* its activity.
*/
int
wihap_check_tx(struct wihap_info *whi, u_int8_t addr[], u_int8_t *txrate)
{
struct wihap_sta_info *sta;
static u_int8_t txratetable[] = { 10, 20, 55, 110 };
if (addr[0] & 0x01) {
*txrate = 0; /* XXX: multicast rate? */
return(1);
}
sta = wihap_sta_find(whi, addr);
if (sta!=NULL && (sta->flags & WI_SIFLAGS_ASSOC)) {
/* Keep it active. */
sta->inactivity_timer = whi->inactivity_time;
*txrate = txratetable[ sta->tx_curr_rate ];
return(1);
}
return(0);
}
/*
* wihap_data_input()
*
* Handle all data input on interface when in Host AP mode.
* Some packets are destined for this machine, others are
* repeated to other stations.
*
* If wihap_data_input() returns a non-zero, it has processed
* the packet and will free the mbuf.
*/
int
wihap_data_input(struct wi_softc *sc, struct wi_frame *rxfrm, struct mbuf *m)
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct wihap_info *whi = &sc->wi_hostap_info;
struct wihap_sta_info *sta;
int mcast;
/* TODS flag must be set. */
if (!(le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_TODS)) {
if (ifp->if_flags & IFF_DEBUG)
printf("wihap_data_input: no TODS src=%6D\n",
rxfrm->wi_addr2, ":");
return(1);
}
/* Check BSSID. (Is this necessary?) */
if (!addr_cmp(rxfrm->wi_addr1, sc->arpcom.ac_enaddr)) {
if (ifp->if_flags & IFF_DEBUG)
printf("wihap_data_input: incorrect bss: %6D\n",
rxfrm->wi_addr1, ":");
return(1);
}
/* Find source station. */
sta = wihap_sta_find(whi, rxfrm->wi_addr2);
/* Source station must be associated. */
if (sta == NULL || !(sta->flags & WI_SIFLAGS_ASSOC)) {
if (ifp->if_flags & IFF_DEBUG)
printf("wihap_data_input: dropping unassoc src %6D\n",
rxfrm->wi_addr2, ":");
return(1);
}
sta->inactivity_timer = whi->inactivity_time;
sta->sig_info = rxfrm->wi_q_info;
/* Repeat this packet to BSS? */
mcast = (rxfrm->wi_addr3[0] & 0x01) != 0;
if (mcast || wihap_sta_is_assoc(whi, rxfrm->wi_addr3)) {
/* If it's multicast, make a copy.
*/
if (mcast) {
m = m_copym(m, 0, M_COPYALL, M_DONTWAIT);
if (m == NULL)
return(0);
m->m_flags |= M_MCAST; /* XXX */
}
/* Queue up for repeating.
*/
IF_HANDOFF(&ifp->if_snd, m, ifp);
return (!mcast);
}
return (0);
}
/*
* wihap_ioctl()
*
* Handle Host AP specific ioctls. Called from wi_ioctl().
*/
int
wihap_ioctl(struct wi_softc *sc, u_long command, caddr_t data)
{
int error = 0;
struct ifreq *ifr = (struct ifreq *) data;
struct wihap_info *whi = &sc->wi_hostap_info;
struct wihap_sta_info *sta;
struct hostap_getall reqall;
struct hostap_sta reqsta;
struct hostap_sta stabuf;
int n;
int flag;
if (!(sc->arpcom.ac_if.if_flags & IFF_RUNNING))
return ENODEV;
switch (command) {
case SIOCHOSTAP_DEL:
if ((error = suser(curthread)))
break;
if ((error = copyin(ifr->ifr_data, &reqsta, sizeof(reqsta))))
break;
sta = wihap_sta_find(whi, reqsta.addr);
if (sta == NULL)
error = ENOENT;
else {
/* Disassociate station. */
if (sta->flags & WI_SIFLAGS_ASSOC)
wihap_sta_disassoc(sc, sta->addr,
IEEE80211_REASON_ASSOC_LEAVE);
/* Deauth station. */
if (sta->flags & WI_SIFLAGS_AUTHEN)
wihap_sta_deauth(sc, sta->addr,
IEEE80211_REASON_AUTH_LEAVE);
wihap_sta_delete(whi, sta);
}
break;
case SIOCHOSTAP_GET:
if ((error = copyin(ifr->ifr_data, &reqsta, sizeof(reqsta))))
break;
sta = wihap_sta_find(whi, reqsta.addr);
if (sta == NULL)
error = ENOENT;
else {
reqsta.flags = sta->flags;
reqsta.asid = sta->asid;
reqsta.capinfo = sta->capinfo;
reqsta.sig_info = sta->sig_info;
reqsta.rates = sta->rates;
error = copyout(&reqsta, ifr->ifr_data,
sizeof(reqsta));
}
break;
case SIOCHOSTAP_ADD:
if ((error = suser(curthread)))
break;
if ((error = copyin(ifr->ifr_data, &reqsta, sizeof(reqsta))))
break;
sta = wihap_sta_find(whi, reqsta.addr);
if (sta != NULL) {
error = EEXIST;
break;
}
if (whi->n_stations >= WIHAP_MAX_STATIONS) {
error = ENOSPC;
break;
}
sta = wihap_sta_alloc(whi, reqsta.addr);
sta->flags = reqsta.flags;
sta->inactivity_timer = whi->inactivity_time;
break;
case SIOCHOSTAP_SFLAGS:
if ((error = suser(curthread)))
break;
if ((error = copyin(ifr->ifr_data, &flag, sizeof(int))))
break;
whi->apflags =
(whi->apflags & WIHAPFL_CANTCHANGE) |
(flag & ~WIHAPFL_CANTCHANGE);
break;
case SIOCHOSTAP_GFLAGS:
flag = (int) whi->apflags;
error = copyout(&flag, ifr->ifr_data, sizeof(int));
break;
case SIOCHOSTAP_GETALL:
if ((error = copyin(ifr->ifr_data, &reqall, sizeof(reqall))))
break;
reqall.nstations = whi->n_stations;
n = 0;
sta = LIST_FIRST(&whi->sta_list);
while (sta && reqall.size >= n+sizeof(struct hostap_sta)) {
bcopy(sta->addr, stabuf.addr, ETHER_ADDR_LEN);
stabuf.asid = sta->asid;
stabuf.flags = sta->flags;
stabuf.capinfo = sta->capinfo;
stabuf.sig_info = sta->sig_info;
stabuf.rates = sta->rates;
error = copyout(&stabuf, (caddr_t) reqall.addr + n,
sizeof(struct hostap_sta));
if (error)
break;
sta = LIST_NEXT(sta, list);
n += sizeof(struct hostap_sta);
}
if (!error)
error = copyout(&reqall, ifr->ifr_data,
sizeof(reqall));
break;
default:
printf("wihap_ioctl: i shouldn't get other ioctls!\n");
error = EINVAL;
}
return(error);
}
#endif /* WI_HOSTAP */
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