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NetBSD/sys/net/if_ieee80211subr.c
lukem 34d65a3414 add RCSIDs
2001-11-12 23:49:33 +00:00

2233 lines
58 KiB
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/* $NetBSD: if_ieee80211subr.c,v 1.6 2001/11/12 23:49:40 lukem Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Atsushi Onoe.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 THE FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* IEEE 802.11 generic handler
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_ieee80211subr.c,v 1.6 2001/11/12 23:49:40 lukem Exp $");
#include "opt_inet.h"
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <machine/endian.h>
#include <crypto/arc4/arc4.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#include <net/if_llc.h>
#include <net/if_ieee80211.h>
#include <dev/ic/wi_ieee.h> /* XXX */
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif
#ifdef IEEE80211_DEBUG
int ieee80211_debug = 0;
#define DPRINTF(X) if (ieee80211_debug) printf X
#else
#define DPRINTF(X)
#endif
static void ieee80211_send_prreq(struct ieee80211com *);
static void ieee80211_send_auth(struct ieee80211com *, int);
static void ieee80211_send_deauth(struct ieee80211com *, int);
static void ieee80211_send_asreq(struct ieee80211com *, int);
static void ieee80211_send_disassoc(struct ieee80211com *, int);
static void ieee80211_recv_beacon(struct ieee80211com *, struct mbuf *, int,
u_int);
static void ieee80211_recv_auth(struct ieee80211com *, struct mbuf *);
static void ieee80211_recv_asresp(struct ieee80211com *, struct mbuf *);
static void ieee80211_recv_disassoc(struct ieee80211com *, struct mbuf *);
static void ieee80211_recv_deauth(struct ieee80211com *, struct mbuf *);
static void ieee80211_crc_init(void);
static u_int32_t ieee80211_crc_update(u_int32_t, u_int8_t *, int);
static const u_int8_t ieee80211_bcast_addr[IEEE80211_ADDR_LEN] =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
static const char *ieee80211_mgt_subtype_name[] = {
"assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
"probe_req", "probe_resp", "reserved#6", "reserved#7",
"beacon", "atim", "disassoc", "auth",
"deauth", "reserved#13", "reserved#14", "reserved#15"
};
void
ieee80211_ifattach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
int i, rate;
ether_ifattach(ifp, ic->ic_myaddr);
ieee80211_crc_init();
memcpy(ic->ic_chan_active, ic->ic_chan_avail,
sizeof(ic->ic_chan_active));
if (isclr(ic->ic_chan_active, ic->ic_ibss_chan)) {
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
if (isset(ic->ic_chan_active, i)) {
ic->ic_ibss_chan = i;
break;
}
}
}
ic->ic_fixed_rate = -1;
if (ic->ic_lintval == 0)
ic->ic_lintval = 100; /* default sleep */
TAILQ_INIT(&ic->ic_scan);
rate = 0;
for (i = 0; i < IEEE80211_RATE_SIZE; i++) {
if (ic->ic_sup_rates[i] != 0)
rate = (ic->ic_sup_rates[i] & IEEE80211_RATE_VAL) / 2;
}
if (rate)
ifp->if_baudrate = IF_Mbps(rate);
ifp->if_hdrlen = sizeof(struct ieee80211_frame);
}
void
ieee80211_ifdetach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
int s;
s = splnet();
IF_PURGE(&ic->ic_mgtq);
if (ic->ic_wep_ctx != NULL) {
free(ic->ic_wep_ctx, M_DEVBUF);
ic->ic_wep_ctx = NULL;
}
ieee80211_free_scan(ifp);
ether_ifdetach(ifp);
}
void
ieee80211_input(struct ifnet *ifp, struct mbuf *m, int rssi, u_int timoff)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_bss *bs;
struct ieee80211_frame *wh;
u_int8_t dir, subtype;
u_int16_t rxseq;
/* trim CRC here for WEP can find its own CRC at the end of packet. */
if (m->m_flags & M_HASFCS) {
m_adj(m, -IEEE80211_CRC_LEN);
m->m_flags &= ~M_HASFCS;
}
wh = mtod(m, struct ieee80211_frame *);
if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
IEEE80211_FC0_VERSION_0) {
if (ifp->if_flags & IFF_DEBUG)
printf("%s: receive packet with wrong version: %x\n",
ifp->if_xname, wh->i_fc[0]);
goto err;
}
dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
if (ic->ic_state != IEEE80211_S_SCAN) {
if (ic->ic_flags & IEEE80211_F_ADHOC) {
if (memcmp(wh->i_addr3, ic->ic_bss.bs_bssid,
IEEE80211_ADDR_LEN) != 0) {
/* not interested in */
DPRINTF(("ieee80211_input: other bss %s\n",
ether_sprintf(wh->i_addr3)));
goto out;
}
TAILQ_FOREACH(bs, &ic->ic_scan, bs_list) {
if (memcmp(wh->i_addr2, bs->bs_macaddr,
IEEE80211_ADDR_LEN) == 0)
break;
}
if (bs == NULL) {
DPRINTF(("ieee80211_input: unknown src %s\n",
ether_sprintf(wh->i_addr2)));
bs = &ic->ic_bss; /* XXX */
}
} else {
bs = &ic->ic_bss;
if (memcmp(wh->i_addr2, bs->bs_bssid,
IEEE80211_ADDR_LEN) != 0) {
DPRINTF(("ieee80211_input: other bss %s\n",
ether_sprintf(wh->i_addr2)));
/* not interested in */
goto out;
}
}
bs->bs_rssi = rssi;
bs->bs_timoff = timoff;
rxseq = bs->bs_rxseq;
bs->bs_rxseq =
le16toh(*(u_int16_t *)wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
/* TODO: fragment */
if ((wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
rxseq == bs->bs_rxseq) {
/* duplicate, silently discarded */
goto out;
}
}
if ((wh->i_fc[1] & IEEE80211_FC1_WEP) &&
(ic->ic_flags & IEEE80211_F_WEPON)) {
m = ieee80211_wep_crypt(ifp, m, 0);
if (m == NULL)
goto err;
wh = mtod(m, struct ieee80211_frame *);
}
switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
case IEEE80211_FC0_TYPE_DATA:
if (ic->ic_flags & IEEE80211_F_ADHOC) {
if (dir != IEEE80211_FC1_DIR_NODS)
goto out;
} else {
if (dir != IEEE80211_FC1_DIR_FROMDS)
goto out;
if ((ifp->if_flags & IFF_SIMPLEX) &&
(wh->i_addr1[1] & 0x01) != 0 &&
memcmp(wh->i_addr3, ic->ic_myaddr,
IEEE80211_ADDR_LEN) == 0) {
/*
* In IEEE802.11 network, multicast packet
* sent from me is broadcasted from AP.
* It should be silently discarded for
* SIMPLEX interface.
*/
goto out;
}
}
m = ieee80211_decap(ifp, m);
if (m == NULL)
goto err;
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
ifp->if_ipackets++;
(*ifp->if_input)(ifp, m);
return;
case IEEE80211_FC0_TYPE_MGT:
if (dir != IEEE80211_FC1_DIR_NODS)
goto err;
subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
/* drop frames without interest */
if (ic->ic_state == IEEE80211_S_SCAN) {
if (subtype != IEEE80211_FC0_SUBTYPE_BEACON &&
subtype != IEEE80211_FC0_SUBTYPE_PROBE_RESP)
goto out;
} else {
if (subtype == IEEE80211_FC0_SUBTYPE_BEACON)
goto out;
}
if (ifp->if_flags & IFF_DEBUG)
printf("%s: received %s from %s\n",
ifp->if_xname,
ieee80211_mgt_subtype_name[subtype >> 4],
ether_sprintf(wh->i_addr2));
switch (subtype) {
case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
case IEEE80211_FC0_SUBTYPE_BEACON:
ieee80211_recv_beacon(ic, m, rssi, timoff);
break;
case IEEE80211_FC0_SUBTYPE_AUTH:
ieee80211_recv_auth(ic, m);
break;
case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
ieee80211_recv_asresp(ic, m);
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
ieee80211_recv_deauth(ic, m);
break;
case IEEE80211_FC0_SUBTYPE_DISASSOC:
ieee80211_recv_disassoc(ic, m);
break;
default:
break;
}
goto out;
case IEEE80211_FC0_TYPE_CTL:
default:
DPRINTF(("ieee80211_input: bad type %x\n", wh->i_fc[0]));
/* should not come here */
break;
}
err:
ifp->if_ierrors++;
out:
if (m != NULL)
m_freem(m);
}
int
ieee80211_mgmt_output(struct ifnet *ifp, struct mbuf *m, int type)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_frame *wh;
M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
if (m == NULL)
return ENOMEM;
wh = mtod(m, struct ieee80211_frame *);
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | type;
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
*(u_int16_t *)wh->i_dur = 0;
*(u_int16_t *)wh->i_seq =
htole16(ic->ic_bss.bs_txseq << IEEE80211_SEQ_SEQ_SHIFT);
ic->ic_bss.bs_txseq++;
memcpy(wh->i_addr1, ic->ic_bss.bs_macaddr, IEEE80211_ADDR_LEN);
memcpy(wh->i_addr2, ic->ic_myaddr, IEEE80211_ADDR_LEN);
memcpy(wh->i_addr3, ic->ic_bss.bs_bssid, IEEE80211_ADDR_LEN);
if (ifp->if_flags & IFF_DEBUG)
printf("%s: sending %s to %s\n", ifp->if_xname,
ieee80211_mgt_subtype_name[(type >> 4) & 0xf],
ether_sprintf(ic->ic_bss.bs_bssid));
IF_ENQUEUE(&ic->ic_mgtq, m);
ic->ic_mgt_timer = IEEE80211_TRANS_WAIT;
ifp->if_timer = 1;
(*ifp->if_start)(ifp);
return 0;
}
struct mbuf *
ieee80211_encap(struct ifnet *ifp, struct mbuf *m)
{
struct ieee80211com *ic = (void *)ifp;
struct ether_header eh;
struct ieee80211_frame *wh;
struct llc *llc;
if (m->m_len < sizeof(struct ether_header)) {
m = m_pullup(m, sizeof(struct ether_header));
if (m == NULL)
return NULL;
}
memcpy(&eh, mtod(m, caddr_t), sizeof(struct ether_header));
m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
llc = mtod(m, struct llc *);
llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
llc->llc_control = LLC_UI;
llc->llc_snap.org_code[0] = 0;
llc->llc_snap.org_code[1] = 0;
llc->llc_snap.org_code[2] = 0;
llc->llc_snap.ether_type = eh.ether_type;
M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
if (m == NULL)
return NULL;
wh = mtod(m, struct ieee80211_frame *);
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
*(u_int16_t *)wh->i_dur = 0;
*(u_int16_t *)wh->i_seq =
htole16(ic->ic_bss.bs_txseq << IEEE80211_SEQ_SEQ_SHIFT);
ic->ic_bss.bs_txseq++;
if (ic->ic_flags & IEEE80211_F_ADHOC) {
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
memcpy(wh->i_addr1, eh.ether_dhost, IEEE80211_ADDR_LEN);
memcpy(wh->i_addr2, eh.ether_shost, IEEE80211_ADDR_LEN);
memcpy(wh->i_addr3, ic->ic_bss.bs_bssid, IEEE80211_ADDR_LEN);
} else {
wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
memcpy(wh->i_addr1, ic->ic_bss.bs_bssid, IEEE80211_ADDR_LEN);
memcpy(wh->i_addr2, eh.ether_shost, IEEE80211_ADDR_LEN);
memcpy(wh->i_addr3, eh.ether_dhost, IEEE80211_ADDR_LEN);
}
return m;
}
struct mbuf *
ieee80211_decap(struct ifnet *ifp, struct mbuf *m)
{
struct ether_header *eh;
struct ieee80211_frame wh;
struct llc *llc;
if (m->m_len < sizeof(wh) + sizeof(*llc)) {
m = m_pullup(m, sizeof(wh) + sizeof(*llc));
if (m == NULL)
return NULL;
}
memcpy(&wh, mtod(m, caddr_t), sizeof(wh));
llc = (struct llc *)(mtod(m, caddr_t) + sizeof(wh));
if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0) {
m_adj(m, sizeof(wh) + sizeof(struct llc) - sizeof(*eh));
llc = NULL;
} else {
m_adj(m, sizeof(wh) - sizeof(*eh));
}
eh = mtod(m, struct ether_header *);
switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
case IEEE80211_FC1_DIR_NODS:
memcpy(eh->ether_dhost, wh.i_addr1, IEEE80211_ADDR_LEN);
memcpy(eh->ether_shost, wh.i_addr2, IEEE80211_ADDR_LEN);
break;
case IEEE80211_FC1_DIR_TODS:
memcpy(eh->ether_dhost, wh.i_addr3, IEEE80211_ADDR_LEN);
memcpy(eh->ether_shost, wh.i_addr2, IEEE80211_ADDR_LEN);
break;
case IEEE80211_FC1_DIR_FROMDS:
memcpy(eh->ether_dhost, wh.i_addr1, IEEE80211_ADDR_LEN);
memcpy(eh->ether_shost, wh.i_addr3, IEEE80211_ADDR_LEN);
break;
case IEEE80211_FC1_DIR_DSTODS:
DPRINTF(("ieee80211_decap: DS to DS\n"));
m_freem(m);
return NULL;
}
if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), u_int32_t)) {
struct mbuf *n, *n0, **np;
caddr_t newdata;
int off;
n0 = NULL;
np = &n0;
off = 0;
while (m->m_pkthdr.len > off) {
if (n0 == NULL) {
MGETHDR(n, M_DONTWAIT, MT_DATA);
if (n == NULL) {
m_freem(m);
return NULL;
}
M_COPY_PKTHDR(n, m);
n->m_len = MHLEN;
} else {
MGET(n, M_DONTWAIT, MT_DATA);
if (n == NULL) {
m_freem(m);
m_freem(n0);
return NULL;
}
n->m_len = MLEN;
}
if (m->m_pkthdr.len - off >= MINCLSIZE) {
MCLGET(n, M_DONTWAIT);
if (n->m_flags & M_EXT)
n->m_len = n->m_ext.ext_size;
}
if (n0 == NULL) {
newdata =
(caddr_t)ALIGN(n->m_data + sizeof(*eh)) -
sizeof(*eh);
n->m_len -= newdata - n->m_data;
n->m_data = newdata;
}
if (n->m_len > m->m_pkthdr.len - off)
n->m_len = m->m_pkthdr.len - off;
m_copydata(m, off, n->m_len, mtod(n, caddr_t));
off += n->m_len;
*np = n;
np = &n->m_next;
}
m_freem(m);
m = n0;
}
if (llc != NULL) {
eh = mtod(m, struct ether_header *);
eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
}
return m;
}
int
ieee80211_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ieee80211com *ic = (void *)ifp;
struct ifreq *ifr = (struct ifreq *)data;
int i, error = 0;
struct ieee80211_nwid nwid;
struct ieee80211_nwkey *nwkey;
struct ieee80211_power *power;
struct ieee80211_wepkey keys[IEEE80211_WEP_NKID];
switch (cmd) {
case SIOCS80211NWID:
if ((error = copyin(ifr->ifr_data, &nwid, sizeof(nwid))) != 0)
break;
if (nwid.i_len > IEEE80211_NWID_LEN) {
error = EINVAL;
break;
}
memset(ic->ic_des_essid, 0, IEEE80211_NWID_LEN);
ic->ic_des_esslen = nwid.i_len;
memcpy(ic->ic_des_essid, nwid.i_nwid, nwid.i_len);
error = ENETRESET;
break;
case SIOCG80211NWID:
memset(&nwid, 0, sizeof(nwid));
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
nwid.i_len = ic->ic_des_esslen;
memcpy(nwid.i_nwid, ic->ic_des_essid, nwid.i_len);
break;
default:
nwid.i_len = ic->ic_bss.bs_esslen;
memcpy(nwid.i_nwid, ic->ic_bss.bs_essid, nwid.i_len);
break;
}
error = copyout(&nwid, ifr->ifr_data, sizeof(nwid));
break;
case SIOCS80211NWKEY:
nwkey = (struct ieee80211_nwkey *)data;
if (nwkey->i_wepon == IEEE80211_NWKEY_OPEN) {
if (ic->ic_flags & IEEE80211_F_WEPON) {
error = ENETRESET;
ic->ic_flags &= ~IEEE80211_F_WEPON;
}
break;
}
if ((ic->ic_flags & IEEE80211_F_HASWEP) == 0) {
error = EINVAL;
break;
}
/* check and copy keys */
memset(keys, 0, sizeof(keys));
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
keys[i].wk_len = nwkey->i_key[i].i_keylen;
if ((keys[i].wk_len > 0 &&
keys[i].wk_len < IEEE80211_WEP_KEYLEN) ||
keys[i].wk_len > sizeof(keys[i].wk_key)) {
error = EINVAL;
break;
}
if (keys[i].wk_len <= 0)
continue;
if ((error = copyin(nwkey->i_key[i].i_keydat,
keys[i].wk_key, keys[i].wk_len)) != 0)
break;
}
if (error)
break;
i = nwkey->i_defkid - 1;
if (i < 0 || i >= IEEE80211_WEP_NKID ||
keys[i].wk_len == 0 ||
(keys[i].wk_len == -1 && ic->ic_nw_keys[i].wk_len == 0)) {
error = EINVAL;
break;
}
/* save the key */
ic->ic_flags |= IEEE80211_F_WEPON;
ic->ic_wep_txkey = i;
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
if (keys[i].wk_len < 0)
continue;
ic->ic_nw_keys[i].wk_len = keys[i].wk_len;
memcpy(ic->ic_nw_keys[i].wk_key, keys[i].wk_key,
sizeof(keys[i].wk_key));
}
error = ENETRESET;
break;
case SIOCG80211NWKEY:
nwkey = (struct ieee80211_nwkey *)data;
if (ic->ic_flags & IEEE80211_F_WEPON)
nwkey->i_wepon = IEEE80211_NWKEY_WEP;
else
nwkey->i_wepon = IEEE80211_NWKEY_OPEN;
nwkey->i_defkid = ic->ic_wep_txkey + 1;
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
if (nwkey->i_key[i].i_keydat == NULL)
continue;
/* do not show any keys to non-root user */
if ((error = suser(curproc->p_ucred,
&curproc->p_acflag)) != 0)
break;
nwkey->i_key[i].i_keylen = ic->ic_nw_keys[i].wk_len;
if ((error = copyout(ic->ic_nw_keys[i].wk_key,
nwkey->i_key[i].i_keydat,
ic->ic_nw_keys[i].wk_len)) != 0)
break;
}
break;
case SIOCS80211POWER:
power = (struct ieee80211_power *)data;
ic->ic_lintval = power->i_maxsleep;
if (power->i_enabled != 0) {
if ((ic->ic_flags & IEEE80211_F_HASPMGT) == 0)
error = EINVAL;
else if ((ic->ic_flags & IEEE80211_F_PMGTON) == 0) {
ic->ic_flags |= IEEE80211_F_PMGTON;
error = ENETRESET;
}
} else {
if (ic->ic_flags & IEEE80211_F_PMGTON) {
ic->ic_flags &= ~IEEE80211_F_PMGTON;
error = ENETRESET;
}
}
break;
case SIOCG80211POWER:
power = (struct ieee80211_power *)data;
power->i_enabled = (ic->ic_flags & IEEE80211_F_PMGTON) ? 1 : 0;
power->i_maxsleep = ic->ic_lintval;
break;
case SIOCGIFGENERIC:
error = ieee80211_cfgget(ifp, cmd, data);
break;
case SIOCSIFGENERIC:
error = suser(curproc->p_ucred, &curproc->p_acflag);
if (error)
break;
error = ieee80211_cfgset(ifp, cmd, data);
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
return error;
}
void
ieee80211_print_essid(u_int8_t *essid, int len)
{
int i;
u_int8_t *p;
if (len > IEEE80211_NWID_LEN)
len = IEEE80211_NWID_LEN; /*XXX*/
/* determine printable or not */
for (i = 0, p = essid; i < len; i++, p++) {
if (*p < ' ' || *p > 0x7e)
break;
}
if (i == len) {
printf("\"");
for (i = 0, p = essid; i < len; i++, p++)
printf("%c", *p);
printf("\"");
} else {
printf("0x");
for (i = 0, p = essid; i < len; i++, p++)
printf("%02x", *p);
}
}
void
ieee80211_dump_pkt(u_int8_t *buf, int len, int rate, int rssi)
{
struct ieee80211_frame *wh;
int i;
wh = (struct ieee80211_frame *)buf;
switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
case IEEE80211_FC1_DIR_NODS:
printf("NODS %s", ether_sprintf(wh->i_addr2));
printf("->%s", ether_sprintf(wh->i_addr1));
printf("(%s)", ether_sprintf(wh->i_addr3));
break;
case IEEE80211_FC1_DIR_TODS:
printf("TODS %s", ether_sprintf(wh->i_addr2));
printf("->%s", ether_sprintf(wh->i_addr3));
printf("(%s)", ether_sprintf(wh->i_addr1));
break;
case IEEE80211_FC1_DIR_FROMDS:
printf("FRDS %s", ether_sprintf(wh->i_addr3));
printf("->%s", ether_sprintf(wh->i_addr1));
printf("(%s)", ether_sprintf(wh->i_addr2));
break;
case IEEE80211_FC1_DIR_DSTODS:
printf("DSDS %s", ether_sprintf((u_int8_t *)&wh[1]));
printf("->%s", ether_sprintf(wh->i_addr3));
printf("(%s", ether_sprintf(wh->i_addr2));
printf("->%s)", ether_sprintf(wh->i_addr1));
break;
}
switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
case IEEE80211_FC0_TYPE_DATA:
printf(" data");
break;
case IEEE80211_FC0_TYPE_MGT:
printf(" %s", ieee80211_mgt_subtype_name[
(wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >> 4]);
break;
default:
printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
break;
}
if (wh->i_fc[1] & IEEE80211_FC1_WEP)
printf(" WEP");
if (rate >= 0)
printf(" %dM", rate / 2);
if (rssi >= 0)
printf(" +%d", rssi);
printf("\n");
if (len > 0) {
for (i = 0; i < len; i++) {
if ((i & 1) == 0)
printf(" ");
printf("%02x", buf[i]);
}
printf("\n");
}
}
void
ieee80211_watchdog(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
if (ic->ic_scan_timer) {
if (--ic->ic_scan_timer == 0) {
if (ic->ic_state == IEEE80211_S_SCAN)
ieee80211_end_scan(ifp);
}
}
if (ic->ic_mgt_timer) {
if (--ic->ic_mgt_timer == 0)
ieee80211_new_state(ifp, IEEE80211_S_SCAN, -1);
}
if (ic->ic_scan_timer != 0 || ic->ic_mgt_timer != 0)
ifp->if_timer = 1;
}
void
ieee80211_next_scan(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
int chan;
chan = ic->ic_bss.bs_chan;
for (;;) {
chan = (chan + 1) % (IEEE80211_CHAN_MAX + 1);
if (isset(ic->ic_chan_active, chan))
break;
if (chan == ic->ic_bss.bs_chan) {
DPRINTF(("ieee80211_next_scan: no chan available\n"));
return;
}
}
DPRINTF(("ieee80211_next_scan: chan %d->%d\n",
ic->ic_bss.bs_chan, chan));
ic->ic_bss.bs_chan = chan;
ieee80211_new_state(ifp, IEEE80211_S_SCAN, -1);
}
void
ieee80211_end_scan(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_bss *bs, *nextbs, *selbs;
u_int8_t rate;
int i, fail;
bs = TAILQ_FIRST(&ic->ic_scan);
if (bs == NULL) {
DPRINTF(("ieee80211_end_scan: no scan candidate\n"));
notfound:
if ((ic->ic_flags & IEEE80211_F_ADHOC) &&
(ic->ic_flags & IEEE80211_F_IBSSON) &&
ic->ic_des_esslen != 0) {
bs = &ic->ic_bss;
if (ifp->if_flags & IFF_DEBUG)
printf("%s: creating ibss\n", ifp->if_xname);
ic->ic_flags |= IEEE80211_F_SIBSS;
bs->bs_nrate = 0;
for (i = 0; i < IEEE80211_RATE_SIZE; i++) {
if (ic->ic_sup_rates[i])
bs->bs_rates[bs->bs_nrate++] =
ic->ic_sup_rates[i];
}
memcpy(bs->bs_macaddr, ic->ic_myaddr,
IEEE80211_ADDR_LEN);
memcpy(bs->bs_bssid, ic->ic_myaddr, IEEE80211_ADDR_LEN);
bs->bs_bssid[0] |= 0x02; /* local bit for IBSS */
bs->bs_esslen = ic->ic_des_esslen;
memcpy(bs->bs_essid, ic->ic_des_essid, bs->bs_esslen);
bs->bs_rssi = 0;
bs->bs_timoff = 0;
memset(bs->bs_tstamp, 0, sizeof(bs->bs_tstamp));
bs->bs_intval = ic->ic_lintval;
bs->bs_capinfo = IEEE80211_CAPINFO_IBSS;
if (ic->ic_flags & IEEE80211_F_WEPON)
bs->bs_capinfo |= IEEE80211_CAPINFO_PRIVACY;
bs->bs_chan = ic->ic_ibss_chan;
bs->bs_fhdwell = 200; /* XXX */
bs->bs_fhindex = 1;
ieee80211_new_state(ifp, IEEE80211_S_RUN, -1);
return;
}
if (ic->ic_flags & IEEE80211_F_ASCAN) {
if (ifp->if_flags & IFF_DEBUG)
printf("%s: entering passive scan mode\n",
ifp->if_xname);
ic->ic_flags &= ~IEEE80211_F_ASCAN;
}
ieee80211_next_scan(ifp);
return;
}
selbs = NULL;
if (ifp->if_flags & IFF_DEBUG)
printf("%s:\tmacaddr chan rssi rate flag wep essid\n",
ifp->if_xname);
for (; bs != NULL; bs = nextbs) {
nextbs = TAILQ_NEXT(bs, bs_list);
if (bs->bs_fails) {
/*
* The configuration of the access points may change
* during my scan. So delete the entry for the AP
* and retry to associate if there is another beacon.
*/
if (bs->bs_fails++ > 2) {
TAILQ_REMOVE(&ic->ic_scan, bs, bs_list);
free(bs, M_DEVBUF);
}
continue;
}
fail = 0;
if (isclr(ic->ic_chan_active, bs->bs_chan))
fail |= 0x01;
if (ic->ic_flags & IEEE80211_F_ADHOC) {
if ((bs->bs_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
fail |= 0x02;
} else {
if ((bs->bs_capinfo & IEEE80211_CAPINFO_ESS) == 0)
fail |= 0x02;
}
if (ic->ic_flags & IEEE80211_F_WEPON) {
if ((bs->bs_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
fail |= 0x04;
} else {
if (bs->bs_capinfo & IEEE80211_CAPINFO_PRIVACY)
fail |= 0x04;
}
rate = ieee80211_fix_rate(ic, bs, IEEE80211_F_DONEGO);
if (rate & IEEE80211_RATE_BASIC)
fail |= 0x08;
if (ic->ic_des_esslen != 0 &&
(bs->bs_esslen != ic->ic_des_esslen ||
memcmp(bs->bs_essid, ic->ic_des_essid,
ic->ic_des_esslen != 0)))
fail |= 0x10;
if (ifp->if_flags & IFF_DEBUG) {
printf(" %c %s", fail ? '-' : '+',
ether_sprintf(bs->bs_macaddr));
printf(" %3d%c", bs->bs_chan, fail & 0x01 ? '!' : ' ');
printf(" %+4d", bs->bs_rssi);
printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
fail & 0x08 ? '!' : ' ');
printf(" %4s%c",
(bs->bs_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
(bs->bs_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
"????",
fail & 0x02 ? '!' : ' ');
printf(" %3s%c ",
(bs->bs_capinfo & IEEE80211_CAPINFO_PRIVACY) ?
"wep" : "no",
fail & 0x04 ? '!' : ' ');
ieee80211_print_essid(bs->bs_essid, bs->bs_esslen);
printf("%s\n", fail & 0x10 ? "!" : "");
}
if (!fail) {
if (selbs == NULL || bs->bs_rssi > selbs->bs_rssi)
selbs = bs;
}
}
if (selbs == NULL)
goto notfound;
ic->ic_bss = *selbs;
if (ic->ic_flags & IEEE80211_F_ADHOC) {
ieee80211_fix_rate(ic, &ic->ic_bss, IEEE80211_F_DOFRATE |
IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
if (ic->ic_bss.bs_nrate == 0) {
selbs->bs_fails++;
goto notfound;
}
ieee80211_new_state(ifp, IEEE80211_S_RUN, -1);
} else
ieee80211_new_state(ifp, IEEE80211_S_AUTH, -1);
}
void
ieee80211_free_scan(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_bss *bs;
while ((bs = TAILQ_FIRST(&ic->ic_scan)) != NULL) {
TAILQ_REMOVE(&ic->ic_scan, bs, bs_list);
free(bs, M_DEVBUF);
}
}
int
ieee80211_fix_rate(struct ieee80211com *ic, struct ieee80211_bss *bs, int flags)
{
int i, j, ignore, error;
int okrate, badrate;
u_int8_t r;
error = 0;
okrate = badrate = 0;
for (i = 0; i < bs->bs_nrate; ) {
ignore = 0;
if (flags & IEEE80211_F_DOSORT) {
for (j = i + 1; j < bs->bs_nrate; j++) {
if ((bs->bs_rates[i] & IEEE80211_RATE_VAL) >
(bs->bs_rates[j] & IEEE80211_RATE_VAL)) {
r = bs->bs_rates[i];
bs->bs_rates[i] = bs->bs_rates[j];
bs->bs_rates[j] = r;
}
}
}
r = bs->bs_rates[i] & IEEE80211_RATE_VAL;
badrate = r;
if (flags & IEEE80211_F_DOFRATE) {
if (ic->ic_fixed_rate >= 0 &&
r != (ic->ic_sup_rates[ic->ic_fixed_rate] &
IEEE80211_RATE_VAL))
ignore++;
}
if (flags & IEEE80211_F_DONEGO) {
for (j = 0; j < IEEE80211_RATE_SIZE; j++) {
if (r ==
(ic->ic_sup_rates[j] & IEEE80211_RATE_VAL))
break;
}
if (j == IEEE80211_RATE_SIZE) {
if (bs->bs_rates[i] & IEEE80211_RATE_BASIC)
error++;
ignore++;
}
}
if (flags & IEEE80211_F_DODEL) {
if (ignore) {
bs->bs_nrate--;
for (j = i; j < bs->bs_nrate; j++)
bs->bs_rates[j] = bs->bs_rates[j + 1];
bs->bs_rates[j] = 0;
continue;
}
}
if (!ignore)
okrate = bs->bs_rates[i];
i++;
}
if (okrate == 0 || error != 0)
return badrate | IEEE80211_RATE_BASIC;
return okrate & IEEE80211_RATE_VAL;
}
static void
ieee80211_send_prreq(struct ieee80211com *ic)
{
int i;
struct mbuf *m;
u_int8_t *frm;
/*
* prreq frame format
* [tlv] ssid
* [tlv] supported rates
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
return;
m->m_data += sizeof(struct ieee80211_frame);
frm = mtod(m, u_int8_t *);
*frm++ = IEEE80211_ELEMID_SSID;
*frm++ = ic->ic_des_esslen;
memcpy(frm, ic->ic_des_essid, ic->ic_des_esslen);
frm += ic->ic_des_esslen;
*frm++ = IEEE80211_ELEMID_RATES;
for (i = 0; i < IEEE80211_RATE_SIZE; i++) {
if (ic->ic_sup_rates[i] != 0)
frm[i + 1] = ic->ic_sup_rates[i];
}
*frm++ = i;
frm += i;
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
/* initialize ic_bss for probe response */
memcpy(ic->ic_bss.bs_macaddr, ieee80211_bcast_addr, IEEE80211_ADDR_LEN);
memcpy(ic->ic_bss.bs_bssid, ieee80211_bcast_addr, IEEE80211_ADDR_LEN);
ic->ic_bss.bs_nrate = 0;
memset(ic->ic_bss.bs_rates, 0, IEEE80211_RATE_SIZE);
for (i = 0; i < IEEE80211_RATE_SIZE; i++) {
if (ic->ic_sup_rates[i] != 0)
ic->ic_bss.bs_rates[ic->ic_bss.bs_nrate++] =
ic->ic_sup_rates[i];
}
ic->ic_bss.bs_associd = 0;
ic->ic_bss.bs_timoff = 0;
ieee80211_mgmt_output(&ic->ic_if, m, IEEE80211_FC0_SUBTYPE_PROBE_REQ);
}
static void
ieee80211_send_auth(struct ieee80211com *ic, int seq)
{
struct mbuf *m;
u_int16_t *frm;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
return;
MH_ALIGN(m, 2 * 3);
m->m_pkthdr.len = m->m_len = 6;
frm = mtod(m, u_int16_t *);
/* TODO: shared key auth */
frm[0] = htole16(IEEE80211_AUTH_ALG_OPEN);
frm[1] = htole16(seq);
frm[2] = 0; /* status */
ieee80211_mgmt_output(&ic->ic_if, m, IEEE80211_FC0_SUBTYPE_AUTH);
}
static void
ieee80211_send_deauth(struct ieee80211com *ic, int reason)
{
struct mbuf *m;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
return;
MH_ALIGN(m, 2);
m->m_pkthdr.len = m->m_len = 2;
*mtod(m, u_int16_t *) = htole16(reason);
ieee80211_mgmt_output(&ic->ic_if, m, IEEE80211_FC0_SUBTYPE_DEAUTH);
}
static void
ieee80211_send_asreq(struct ieee80211com *ic, int reassoc)
{
struct mbuf *m;
u_int8_t *frm, *rates;
u_int16_t capinfo;
int i;
/*
* asreq frame format
* [2] capability information
* [2] listen interval
* [6*] current AP address (reassoc only)
* [tlv] ssid
* [tlv] supported rates
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
return;
m->m_data += sizeof(struct ieee80211_frame);
frm = mtod(m, u_int8_t *);
capinfo = 0;
if (ic->ic_flags & IEEE80211_F_ADHOC)
capinfo |= IEEE80211_CAPINFO_IBSS;
else
capinfo |= IEEE80211_CAPINFO_ESS;
if (ic->ic_flags & IEEE80211_F_WEPON)
capinfo |= IEEE80211_CAPINFO_PRIVACY;
*(u_int16_t *)frm = htole16(capinfo);
frm += 2;
*(u_int16_t *)frm = htole16(ic->ic_lintval);
frm += 2;
if (reassoc) {
memcpy(frm, ic->ic_bss.bs_bssid, IEEE80211_ADDR_LEN);
frm += IEEE80211_ADDR_LEN;
}
*frm++ = IEEE80211_ELEMID_SSID;
*frm++ = ic->ic_bss.bs_esslen;
memcpy(frm, ic->ic_bss.bs_essid, ic->ic_bss.bs_esslen);
frm += ic->ic_bss.bs_esslen;
*frm++ = IEEE80211_ELEMID_RATES;
rates = frm++; /* update later */
for (i = 0; i < IEEE80211_RATE_SIZE; i++) {
if (ic->ic_bss.bs_rates[i] != 0)
*frm++ = ic->ic_bss.bs_rates[i];
}
*rates = frm - (rates + 1);
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
ieee80211_mgmt_output(&ic->ic_if, m,
reassoc ? IEEE80211_FC0_SUBTYPE_REASSOC_REQ :
IEEE80211_FC0_SUBTYPE_ASSOC_REQ);
}
static void
ieee80211_send_disassoc(struct ieee80211com *ic, int reason)
{
struct mbuf *m;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
return;
MH_ALIGN(m, 2);
m->m_pkthdr.len = m->m_len = 2;
*mtod(m, u_int16_t *) = htole16(reason);
ieee80211_mgmt_output(&ic->ic_if, m, IEEE80211_FC0_SUBTYPE_DISASSOC);
}
static void
ieee80211_recv_beacon(struct ieee80211com *ic, struct mbuf *m0, int rssi,
u_int timoff)
{
struct ieee80211_frame *wh;
struct ieee80211_bss *bs;
u_int8_t *frm, *efrm, *tstamp, *bintval, *capinfo, *ssid, *rates;
u_int8_t chan, fhindex;
u_int16_t fhdwell;
if ((ic->ic_flags & IEEE80211_F_ADHOC) == 0 &&
ic->ic_state != IEEE80211_S_SCAN) {
/* XXX: may be useful for background scan */
return;
}
wh = mtod(m0, struct ieee80211_frame *);
frm = (u_int8_t *)&wh[1];
efrm = mtod(m0, u_int8_t *) + m0->m_len;
/*
* beacon frame format
* [8] time stamp
* [2] beacon interval
* [2] cabability information
* [tlv] ssid
* [tlv] supported rates
* [tlv] parameter set (FH/DS)
*/
tstamp = frm; frm += 8;
bintval = frm; frm += 2;
capinfo = frm; frm += 2;
ssid = rates = NULL;
chan = ic->ic_bss.bs_chan;
fhdwell = 0;
fhindex = 0;
while (frm < efrm) {
switch (*frm) {
case IEEE80211_ELEMID_SSID:
ssid = frm;
break;
case IEEE80211_ELEMID_RATES:
rates = frm;
break;
case IEEE80211_ELEMID_FHPARMS:
fhdwell = (frm[3] << 8) | frm[2];
chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
fhindex = frm[6];
break;
case IEEE80211_ELEMID_DSPARMS:
chan = frm[2];
break;
}
frm += frm[1] + 2;
}
if (ssid == NULL || rates == NULL) {
DPRINTF(("ieee80211_recv_beacon: ssid=%p, rates=%p, chan=%d\n",
ssid, rates, chan));
return;
}
if (ssid[1] > IEEE80211_NWID_LEN) {
DPRINTF(("ieee80211_recv_beacon: bad ssid len %d from %s\n",
ssid[1], ether_sprintf(wh->i_addr2)));
return;
}
TAILQ_FOREACH(bs, &ic->ic_scan, bs_list) {
if (memcmp(bs->bs_macaddr, wh->i_addr2,
IEEE80211_ADDR_LEN) == 0 &&
memcmp(bs->bs_bssid, wh->i_addr3,
IEEE80211_ADDR_LEN) == 0)
break;
}
if (bs == NULL) {
bs = malloc(sizeof(*bs), M_DEVBUF, M_NOWAIT);
if (bs == NULL)
return;
memset(bs, 0, sizeof(*bs));
DPRINTF(("ieee80211_recv_beacon: new beacon from %s\n",
ether_sprintf(wh->i_addr3)));
TAILQ_INSERT_TAIL(&ic->ic_scan, bs, bs_list);
memcpy(bs->bs_macaddr, wh->i_addr2, IEEE80211_ADDR_LEN);
memcpy(bs->bs_bssid, wh->i_addr3, IEEE80211_ADDR_LEN);
bs->bs_esslen = ssid[1];
memset(bs->bs_essid, 0, sizeof(bs->bs_essid));
memcpy(bs->bs_essid, ssid + 2, ssid[1]);
} else if (ssid[1] != 0) {
/*
* Update ESSID at probe response to adopt hidden AP by
* Lucent/Cisco, which announces null ESSID in beacon.
*/
if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) ==
IEEE80211_FC0_SUBTYPE_PROBE_RESP) {
bs->bs_esslen = ssid[1];
memset(bs->bs_essid, 0, sizeof(bs->bs_essid));
memcpy(bs->bs_essid, ssid + 2, ssid[1]);
}
}
memset(bs->bs_rates, 0, IEEE80211_RATE_SIZE);
bs->bs_nrate = rates[1];
memcpy(bs->bs_rates, rates + 2, bs->bs_nrate);
ieee80211_fix_rate(ic, bs, IEEE80211_F_DOSORT);
bs->bs_rssi = rssi;
bs->bs_timoff = timoff;
memcpy(bs->bs_tstamp, tstamp, sizeof(bs->bs_tstamp));
bs->bs_intval = le16toh(*(u_int16_t *)bintval);
bs->bs_capinfo = le16toh(*(u_int16_t *)capinfo);
bs->bs_chan = chan;
bs->bs_fhdwell = fhdwell;
bs->bs_fhindex = fhindex;
if (ic->ic_state == IEEE80211_S_SCAN && ic->ic_scan_timer == 0)
ieee80211_end_scan(&ic->ic_if);
}
static void
ieee80211_recv_auth(struct ieee80211com *ic, struct mbuf *m0)
{
struct ieee80211_frame *wh;
struct ieee80211_bss *bs;
u_int8_t *frm, *efrm;
u_int16_t algo, seq, status;
wh = mtod(m0, struct ieee80211_frame *);
frm = (u_int8_t *)&wh[1];
efrm = mtod(m0, u_int8_t *) + m0->m_len;
/*
* auth frame format
* [2] algorithm
* [2] sequence
* [2] status
* [tlv*] challenge
*/
if (frm + 6 > efrm) {
DPRINTF(("ieee80211_recv_auth: too short from %s\n",
ether_sprintf(wh->i_addr2)));
return;
}
algo = le16toh(*(u_int16_t *)frm);
seq = le16toh(*(u_int16_t *)(frm + 2));
status = le16toh(*(u_int16_t *)(frm + 4));
if (algo != IEEE80211_AUTH_ALG_OPEN) {
/* TODO: shared key auth */
DPRINTF(("ieee80211_recv_auth: unsupported auth %d from %s\n",
algo, ether_sprintf(wh->i_addr2)));
return;
}
if (ic->ic_flags & IEEE80211_F_ADHOC) {
if (ic->ic_state != IEEE80211_S_RUN)
return;
if (seq == 1) {
ieee80211_new_state(&ic->ic_if, IEEE80211_S_AUTH,
wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK);
return;
}
}
if (ic->ic_state != IEEE80211_S_AUTH || seq != 2)
return;
if (status != 0) {
printf("%s: authentication failed (reason %d) for %s\n",
ic->ic_if.if_xname, status, ether_sprintf(wh->i_addr3));
TAILQ_FOREACH(bs, &ic->ic_scan, bs_list) {
if (memcmp(bs->bs_macaddr, wh->i_addr2,
IEEE80211_ADDR_LEN) == 0) {
bs->bs_fails++;
break;
}
}
return;
}
ieee80211_new_state(&ic->ic_if, IEEE80211_S_ASSOC,
wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK);
}
static void
ieee80211_recv_asresp(struct ieee80211com *ic, struct mbuf *m0)
{
struct ifnet *ifp = &ic->ic_if;
struct ieee80211_frame *wh;
struct ieee80211_bss *bs = &ic->ic_bss;
u_int8_t *frm, *efrm, *rates;
int status;
wh = mtod(m0, struct ieee80211_frame *);
frm = (u_int8_t *)&wh[1];
efrm = mtod(m0, u_int8_t *) + m0->m_len;
/*
* asresp frame format
* [2] capability information
* [2] status
* [2] association ID
* [tlv] supported rates
*/
if (frm + 6 > efrm) {
DPRINTF(("ieee80211_recv_asresp: too short from %s\n",
ether_sprintf(wh->i_addr2)));
return;
}
bs->bs_capinfo = le16toh(*(u_int16_t *)frm);
frm += 2;
status = le16toh(*(u_int16_t *)frm);
frm += 2;
if (status != 0) {
printf("%s: association failed (reason %d) for %s\n",
ifp->if_xname, status, ether_sprintf(wh->i_addr3));
TAILQ_FOREACH(bs, &ic->ic_scan, bs_list) {
if (memcmp(bs->bs_macaddr, wh->i_addr2,
IEEE80211_ADDR_LEN) == 0) {
bs->bs_fails++;
break;
}
}
return;
}
bs->bs_associd = le16toh(*(u_int16_t *)frm);
frm += 2;
rates = frm;
memset(bs->bs_rates, 0, IEEE80211_RATE_SIZE);
bs->bs_nrate = rates[1];
memcpy(bs->bs_rates, rates + 2, bs->bs_nrate);
ieee80211_fix_rate(ic, bs, IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
if (bs->bs_nrate == 0)
return;
ieee80211_new_state(ifp, IEEE80211_S_RUN,
wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK);
}
static void
ieee80211_recv_disassoc(struct ieee80211com *ic, struct mbuf *m0)
{
struct ieee80211_frame *wh;
wh = mtod(m0, struct ieee80211_frame *);
if ((ic->ic_flags & IEEE80211_F_ADHOC) == 0)
ieee80211_new_state(&ic->ic_if, IEEE80211_S_ASSOC,
wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK);
}
static void
ieee80211_recv_deauth(struct ieee80211com *ic, struct mbuf *m0)
{
struct ieee80211_frame *wh;
wh = mtod(m0, struct ieee80211_frame *);
if ((ic->ic_flags & IEEE80211_F_ADHOC) == 0)
ieee80211_new_state(&ic->ic_if, IEEE80211_S_AUTH,
wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK);
}
int
ieee80211_new_state(struct ifnet *ifp, enum ieee80211_state nstate, int mgt)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_bss *bs;
int error, ostate;
#ifdef IEEE80211_DEBUG
static const char *stname[] =
{ "INIT", "SCAN", "AUTH", "ASSOC", "RUN" };
#endif
ostate = ic->ic_state;
DPRINTF(("ieee80211_new_state: %s -> %s\n",
stname[ostate], stname[nstate]));
if (ic->ic_newstate) {
error = (*ic->ic_newstate)(ic->ic_softc, nstate);
if (error == EINPROGRESS)
return 0;
if (error != 0)
return error;
}
/* state transition */
ic->ic_state = nstate;
switch (nstate) {
case IEEE80211_S_INIT:
switch (ostate) {
case IEEE80211_S_INIT:
break;
case IEEE80211_S_RUN:
if ((ic->ic_flags & IEEE80211_F_ADHOC) == 0)
ieee80211_send_disassoc(ic,
IEEE80211_REASON_ASSOC_LEAVE);
/* FALLTHRU */
case IEEE80211_S_ASSOC:
ieee80211_send_deauth(ic, IEEE80211_REASON_AUTH_LEAVE);
/* FALLTHRU */
case IEEE80211_S_AUTH:
case IEEE80211_S_SCAN:
ic->ic_scan_timer = 0;
ic->ic_mgt_timer = 0;
IF_PURGE(&ic->ic_mgtq);
if (ic->ic_wep_ctx != NULL) {
free(ic->ic_wep_ctx, M_DEVBUF);
ic->ic_wep_ctx = NULL;
}
ieee80211_free_scan(ifp);
break;
}
break;
case IEEE80211_S_SCAN:
switch (ostate) {
case IEEE80211_S_INIT:
ic->ic_flags |= IEEE80211_F_ASCAN;
ic->ic_flags &= ~IEEE80211_F_SIBSS;
ic->ic_scan_timer = IEEE80211_ASCAN_WAIT;
/* use lowest rate */
ic->ic_bss.bs_txrate = 0;
ieee80211_send_prreq(ic);
break;
case IEEE80211_S_SCAN:
/* scan next */
ic->ic_flags &= ~IEEE80211_F_SIBSS;
if (ic->ic_flags & IEEE80211_F_ASCAN) {
if (ic->ic_scan_timer == 0)
ic->ic_scan_timer =
IEEE80211_ASCAN_WAIT;
ieee80211_send_prreq(ic);
} else {
if (ic->ic_scan_timer == 0)
ic->ic_scan_timer =
IEEE80211_PSCAN_WAIT;
ifp->if_timer = 1;
}
break;
case IEEE80211_S_RUN:
/* beacon miss */
if (ifp->if_flags & IFF_DEBUG)
printf("%s: no recent beacons from %s;"
" rescanning\n",
ifp->if_xname,
ether_sprintf(ic->ic_bss.bs_bssid));
ieee80211_free_scan(ifp);
/* FALLTHRU */
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
/* timeout restart scan */
TAILQ_FOREACH(bs, &ic->ic_scan, bs_list) {
if (memcmp(ic->ic_bss.bs_macaddr,
bs->bs_macaddr, IEEE80211_ADDR_LEN) == 0) {
bs->bs_fails++;
break;
}
}
ic->ic_flags |= IEEE80211_F_ASCAN;
ic->ic_scan_timer = IEEE80211_ASCAN_WAIT;
ic->ic_flags &= ~IEEE80211_F_SIBSS;
ieee80211_send_prreq(ic);
break;
}
break;
case IEEE80211_S_AUTH:
switch (ostate) {
case IEEE80211_S_INIT:
DPRINTF(("ieee80211_new_state: invalid transition\n"));
break;
case IEEE80211_S_SCAN:
ieee80211_send_auth(ic, 1);
break;
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
switch (mgt) {
case IEEE80211_FC0_SUBTYPE_AUTH:
/* ??? */
ieee80211_send_auth(ic, 2);
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
/* ignore and retry scan on timeout */
break;
}
break;
case IEEE80211_S_RUN:
switch (mgt) {
case IEEE80211_FC0_SUBTYPE_AUTH:
ieee80211_send_auth(ic, 2);
ic->ic_state = ostate; /* stay RUN */
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
/* try to reauth */
ieee80211_send_auth(ic, 1);
break;
}
break;
}
break;
case IEEE80211_S_ASSOC:
switch (ostate) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
case IEEE80211_S_ASSOC:
DPRINTF(("ieee80211_new_state: invalid transition\n"));
break;
case IEEE80211_S_AUTH:
ieee80211_send_asreq(ic, 0);
break;
case IEEE80211_S_RUN:
ieee80211_send_asreq(ic, 1);
break;
}
break;
case IEEE80211_S_RUN:
switch (ostate) {
case IEEE80211_S_INIT:
case IEEE80211_S_AUTH:
case IEEE80211_S_RUN:
DPRINTF(("ieee80211_new_state: invalid transition\n"));
break;
case IEEE80211_S_SCAN: /* adhoc mode */
case IEEE80211_S_ASSOC: /* infra mode */
if (ifp->if_flags & IFF_DEBUG) {
printf("%s: associated with %s ssid ",
ifp->if_xname,
ether_sprintf(ic->ic_bss.bs_bssid));
ieee80211_print_essid(ic->ic_bss.bs_essid,
ic->ic_bss.bs_esslen);
printf(" channel %d\n", ic->ic_bss.bs_chan);
}
/* start with highest negotiated rate */
ic->ic_bss.bs_txrate = ic->ic_bss.bs_nrate - 1;
ic->ic_mgt_timer = 0;
(*ifp->if_start)(ifp);
break;
}
break;
}
return 0;
}
struct mbuf *
ieee80211_wep_crypt(struct ifnet *ifp, struct mbuf *m0, int txflag)
{
struct ieee80211com *ic = (void *)ifp;
struct mbuf *m, *n, *n0;
struct ieee80211_frame *wh;
int left, len, moff, noff, kid;
u_int32_t iv, crc;
u_int8_t *ivp;
void *ctx;
u_int8_t keybuf[IEEE80211_WEP_IVLEN + IEEE80211_KEYBUF_SIZE];
u_int8_t crcbuf[IEEE80211_WEP_CRCLEN];
n0 = NULL;
if ((ctx = ic->ic_wep_ctx) == NULL) {
ctx = malloc(arc4_ctxlen(), M_DEVBUF, M_NOWAIT);
if (ctx == NULL)
goto fail;
ic->ic_wep_ctx = ctx;
}
m = m0;
left = m->m_pkthdr.len;
MGET(n, M_DONTWAIT, m->m_type);
n0 = n;
if (n == NULL)
goto fail;
M_COPY_PKTHDR(n, m);
len = IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_CRCLEN;
if (txflag) {
n->m_pkthdr.len += len;
} else {
n->m_pkthdr.len -= len;
left -= len;
}
n->m_len = MHLEN;
if (n->m_pkthdr.len >= MINCLSIZE) {
MCLGET(n, M_DONTWAIT);
if (n->m_flags & M_EXT)
n->m_len = n->m_ext.ext_size;
}
len = sizeof(struct ieee80211_frame);
memcpy(mtod(n, caddr_t), mtod(m, caddr_t), len);
wh = mtod(n, struct ieee80211_frame *);
left -= len;
moff = len;
noff = len;
if (txflag) {
kid = ic->ic_wep_txkey;
wh->i_fc[1] |= IEEE80211_FC1_WEP;
/*
* XXX
* IV must not duplicate during the lifetime of the key.
* But no mechanism to renew keys is defined in IEEE 802.11
* WEP. And IV may be duplicated between other stations
* because of the session key itself is shared.
* So we use pseudo random IV here, though it is not the
* best way.
*/
iv = random();
ivp = mtod(n, u_int8_t *) + noff;
memcpy(ivp, (caddr_t)&iv, IEEE80211_WEP_IVLEN);
ivp[IEEE80211_WEP_IVLEN] = kid << 6; /* pad and keyid */
noff += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN;
} else {
wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
ivp = mtod(m, u_int8_t *) + moff;
kid = ivp[IEEE80211_WEP_IVLEN] >> 6;
moff += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN;
}
memcpy(keybuf, ivp, IEEE80211_WEP_IVLEN);
memcpy(keybuf + IEEE80211_WEP_IVLEN, ic->ic_nw_keys[kid].wk_key,
ic->ic_nw_keys[kid].wk_len);
arc4_setkey(ctx, keybuf,
IEEE80211_WEP_IVLEN + ic->ic_nw_keys[kid].wk_len);
/* encrypt with calculating CRC */
crc = ~0;
while (left > 0) {
len = m->m_len - moff;
if (len == 0) {
m = m->m_next;
moff = 0;
continue;
}
if (len > n->m_len - noff) {
len = n->m_len - noff;
if (len == 0) {
MGET(n->m_next, M_DONTWAIT, n->m_type);
if (n->m_next == NULL)
goto fail;
n = n->m_next;
n->m_len = MLEN;
if (left >= MINCLSIZE) {
MCLGET(n, M_DONTWAIT);
if (n->m_flags & M_EXT)
n->m_len = n->m_ext.ext_size;
}
noff = 0;
continue;
}
}
if (len > left)
len = left;
arc4_encrypt(ctx, mtod(n, caddr_t) + noff,
mtod(m, caddr_t) + moff, len);
if (txflag)
crc = ieee80211_crc_update(crc,
mtod(m, u_int8_t *) + moff, len);
else
crc = ieee80211_crc_update(crc,
mtod(n, u_int8_t *) + noff, len);
left -= len;
moff += len;
noff += len;
}
crc = ~crc;
if (txflag) {
*(u_int32_t *)crcbuf = htole16(crc);
if (n->m_len >= noff + sizeof(crcbuf))
n->m_len = noff + sizeof(crcbuf);
else {
n->m_len = noff;
MGET(n->m_next, M_DONTWAIT, n->m_type);
if (n->m_next == NULL)
goto fail;
n = n->m_next;
n->m_len = sizeof(crcbuf);
noff = 0;
}
arc4_encrypt(ctx, mtod(n, caddr_t) + noff, crcbuf,
sizeof(crcbuf));
} else {
n->m_len = noff;
for (noff = 0; noff < sizeof(crcbuf); noff += len) {
len = sizeof(crcbuf) - noff;
if (len > m->m_len - moff)
len = m->m_len - moff;
if (len > 0)
arc4_encrypt(ctx, crcbuf + noff,
mtod(m, caddr_t) + moff, len);
m = m->m_next;
moff = 0;
}
if (crc != le16toh(*(u_int32_t *)crcbuf)) {
#ifdef IEEE80211_DEBUG
printf("ieee80211_wep_crypt: decrypt CRC error\n");
if (ieee80211_debug)
ieee80211_dump_pkt(n0->m_data, n0->m_len,
-1, -1);
#endif
goto fail;
}
}
m_freem(m0);
return n0;
fail:
m_freem(m0);
m_freem(n0);
return NULL;
}
/*
* CRC 32 -- routine from RFC 2083
*/
/* Table of CRCs of all 8-bit messages */
static u_int32_t ieee80211_crc_table[256];
/* Make the table for a fast CRC. */
static void
ieee80211_crc_init(void)
{
u_int32_t c;
int n, k;
for (n = 0; n < 256; n++) {
c = (u_int32_t)n;
for (k = 0; k < 8; k++) {
if (c & 1)
c = 0xedb88320UL ^ (c >> 1);
else
c = c >> 1;
}
ieee80211_crc_table[n] = c;
}
}
/*
* Update a running CRC with the bytes buf[0..len-1]--the CRC
* should be initialized to all 1's, and the transmitted value
* is the 1's complement of the final running CRC
*/
static u_int32_t
ieee80211_crc_update(u_int32_t crc, u_int8_t *buf, int len)
{
u_int8_t *endbuf;
for (endbuf = buf + len; buf < endbuf; buf++)
crc = ieee80211_crc_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
return crc;
}
/*
* XXX
* Wireless LAN specific configuration interface, which is compatible
* with wiconfig(8).
*/
int
ieee80211_cfgget(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ieee80211com *ic = (void *)ifp;
int i, error;
struct ifreq *ifr = (struct ifreq *)data;
struct wi_req wreq;
struct wi_ltv_keys *keys;
#ifdef WICACHE
struct wi_sigcache wsc;
struct ieee80211_bss *bp;
#endif /* WICACHE */
error = copyin(ifr->ifr_data, &wreq, sizeof(wreq));
if (error)
return error;
wreq.wi_len = 0;
switch (wreq.wi_type) {
case WI_RID_SERIALNO:
/* nothing appropriate */
break;
case WI_RID_NODENAME:
strcpy((char *)&wreq.wi_val[1], hostname);
wreq.wi_val[0] = strlen(hostname);
wreq.wi_len = (1 + wreq.wi_val[0] + 1) / 2;
break;
case WI_RID_CURRENT_SSID:
if (ic->ic_state == IEEE80211_S_RUN) {
wreq.wi_val[0] = ic->ic_bss.bs_esslen;
memcpy(&wreq.wi_val[1], ic->ic_bss.bs_essid,
ic->ic_bss.bs_esslen);
} else {
wreq.wi_val[0] = 0;
wreq.wi_val[1] = '\0';
}
wreq.wi_len = (1 + wreq.wi_val[0] + 1) / 2;
break;
case WI_RID_OWN_SSID:
case WI_RID_DESIRED_SSID:
wreq.wi_val[0] = ic->ic_des_esslen;
memcpy(&wreq.wi_val[1], ic->ic_des_essid, ic->ic_des_esslen);
wreq.wi_len = (1 + wreq.wi_val[0] + 1) / 2;
break;
case WI_RID_CURRENT_BSSID:
if (ic->ic_state == IEEE80211_S_RUN)
memcpy(wreq.wi_val, ic->ic_bss.bs_bssid,
IEEE80211_ADDR_LEN);
else
memset(wreq.wi_val, 0, IEEE80211_ADDR_LEN);
wreq.wi_len = IEEE80211_ADDR_LEN / 2;
break;
case WI_RID_CHANNEL_LIST:
for (i = 0; i <= IEEE80211_CHAN_MAX; i += 16) {
wreq.wi_val[i / 16] = ic->ic_chan_active[i / 8] |
(ic->ic_chan_active[i / 8 + 1] << 8);
if (wreq.wi_val[i / 16] != 0)
wreq.wi_len = i / 16 + 1;
}
break;
case WI_RID_OWN_CHNL:
wreq.wi_val[0] = ic->ic_ibss_chan;
wreq.wi_len = 1;
break;
case WI_RID_CURRENT_CHAN:
wreq.wi_val[0] = ic->ic_bss.bs_chan;
wreq.wi_len = 1;
break;
case WI_RID_COMMS_QUALITY:
wreq.wi_val[0] = 0; /* quality */
wreq.wi_val[1] = ic->ic_bss.bs_rssi; /* signal */
wreq.wi_val[2] = 0; /* noise */
wreq.wi_len = 3;
break;
case WI_RID_PROMISC:
wreq.wi_val[0] = (ifp->if_flags & IFF_PROMISC) ? 1 : 0;
wreq.wi_len = 1;
break;
case WI_RID_PORTTYPE:
wreq.wi_val[0] = (ic->ic_flags & IEEE80211_F_ADHOC) ? 2 : 1;
wreq.wi_len = 1;
break;
case WI_RID_MAC_NODE:
memcpy(wreq.wi_val, ic->ic_myaddr, IEEE80211_ADDR_LEN);
wreq.wi_len = IEEE80211_ADDR_LEN / 2;
break;
case WI_RID_TX_RATE:
if (ic->ic_fixed_rate == -1)
wreq.wi_val[0] = 0; /* auto */
else
wreq.wi_val[0] = (ic->ic_sup_rates[ic->ic_fixed_rate] &
IEEE80211_RATE_VAL) / 2;
wreq.wi_len = 1;
break;
case WI_RID_CUR_TX_RATE:
wreq.wi_val[0] = (ic->ic_bss.bs_rates[ic->ic_bss.bs_txrate] &
IEEE80211_RATE_VAL) / 2;
wreq.wi_len = 1;
break;
case WI_RID_RTS_THRESH:
wreq.wi_val[0] = IEEE80211_MAX_LEN; /* TODO: RTS */
wreq.wi_len = 1;
break;
case WI_RID_CREATE_IBSS:
wreq.wi_val[0] = (ic->ic_flags & IEEE80211_F_IBSSON) ? 1 : 0;
wreq.wi_len = 1;
break;
case WI_RID_MICROWAVE_OVEN:
wreq.wi_val[0] = 0; /* no ... not supported */
wreq.wi_len = 1;
break;
case WI_RID_ROAMING_MODE:
wreq.wi_val[0] = 1; /* enabled ... not supported */
wreq.wi_len = 1;
break;
case WI_RID_SYSTEM_SCALE:
wreq.wi_val[0] = 1; /* low density ... not supported */
wreq.wi_len = 1;
break;
case WI_RID_PM_ENABLED:
wreq.wi_val[0] = (ic->ic_flags & IEEE80211_F_PMGTON) ? 1 : 0;
wreq.wi_len = 1;
break;
case WI_RID_MAX_SLEEP:
wreq.wi_val[0] = ic->ic_lintval;
wreq.wi_len = 1;
break;
case WI_RID_WEP_AVAIL:
wreq.wi_val[0] = (ic->ic_flags & IEEE80211_F_HASWEP) ? 1 : 0;
wreq.wi_len = 1;
break;
case WI_RID_AUTH_CNTL:
wreq.wi_val[0] = 1; /* open system authentication only */
wreq.wi_len = 1;
break;
case WI_RID_ENCRYPTION:
wreq.wi_val[0] = (ic->ic_flags & IEEE80211_F_WEPON) ? 1 : 0;
wreq.wi_len = 1;
break;
case WI_RID_TX_CRYPT_KEY:
wreq.wi_val[0] = ic->ic_wep_txkey;
wreq.wi_len = 1;
break;
case WI_RID_DEFLT_CRYPT_KEYS:
keys = (struct wi_ltv_keys *)&wreq;
/* do not show keys to non-root user */
error = suser(curproc->p_ucred, &curproc->p_acflag);
if (error) {
memset(keys, 0, sizeof(*keys));
error = 0;
break;
}
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
keys->wi_keys[i].wi_keylen = ic->ic_nw_keys[i].wk_len;
memcpy(keys->wi_keys[i].wi_keydat,
ic->ic_nw_keys[i].wk_key, ic->ic_nw_keys[i].wk_len);
}
wreq.wi_len = sizeof(*keys) / 2;
break;
case WI_RID_MAX_DATALEN:
wreq.wi_val[0] = IEEE80211_MAX_LEN; /* TODO: fragment */
wreq.wi_len = 1;
break;
case WI_RID_IFACE_STATS:
/* not implemented yet */
wreq.wi_len = 0;
break;
#ifdef WICACHE
case WI_RID_READ_CACHE:
i = 0;
TAILQ_FOREACH(bs, &ic->ic_scan, bs_list) {
if (i == MAXCACHE)
break;
memcpy(wsc.macsrc, bs->bs_macaddr, IEEE80211_ADDR_LEN);
memset(&wsc.ipsrc, 0, sizeof(wsc.ipsrc));
wsc.signal = bp->rssi;
wsc.noise = 0;
wsc.quality = 0;
memcpy((caddr_t)wreq.wi_val + sizeof(wsc) * i,
&wsc, sizeof(wsc));
i++;
}
wreq.wi_len = sizeof(wsc) * i / 2;
break;
#endif /* WICACHE */
default:
error = EINVAL;
break;
}
if (error == 0) {
wreq.wi_len++;
error = copyout(&wreq, ifr->ifr_data, sizeof(wreq));
}
return error;
}
int
ieee80211_cfgset(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ieee80211com *ic = (void *)ifp;
int i, error;
struct ifreq *ifr = (struct ifreq *)data;
struct wi_ltv_keys *keys;
struct wi_req wreq;
u_char chanlist[(IEEE80211_CHAN_MAX+1)/NBBY];
error = copyin(ifr->ifr_data, &wreq, sizeof(wreq));
if (error)
return error;
if (wreq.wi_len-- < 1)
return EINVAL;
switch (wreq.wi_type) {
case WI_RID_SERIALNO:
case WI_RID_NODENAME:
return EPERM;
case WI_RID_CURRENT_SSID:
return EPERM;
case WI_RID_OWN_SSID:
case WI_RID_DESIRED_SSID:
if (wreq.wi_len < (1 + wreq.wi_val[0] + 1) / 2)
return EINVAL;
if (wreq.wi_val[0] > IEEE80211_NWID_LEN)
return EINVAL;
ic->ic_des_esslen = wreq.wi_val[0];
memset(ic->ic_des_essid, 0, sizeof(ic->ic_des_essid));
memcpy(ic->ic_des_essid, &wreq.wi_val[1], ic->ic_des_esslen);
error = ENETRESET;
break;
case WI_RID_CURRENT_BSSID:
return EPERM;
case WI_RID_CHANNEL_LIST:
if (wreq.wi_len > (IEEE80211_CHAN_MAX + 1) / 16)
return EINVAL;
memset(chanlist, 0, sizeof(chanlist));
for (i = 0; i < wreq.wi_len; i++) {
chanlist[i * 2] = wreq.wi_val[i] & 0xff;
chanlist[i * 2 + 1] = wreq.wi_val[i] >> 8;
}
error = EINVAL;
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
if (isclr(chanlist, i))
continue;
if (isclr(ic->ic_chan_avail, i)) {
if (ic->ic_chancheck == NULL)
return EPERM;
error = (*ic->ic_chancheck)(ic->ic_softc,
chanlist);
break;
}
error = 0;
}
if (error == 0) {
memcpy(ic->ic_chan_active, chanlist,
sizeof(ic->ic_chan_active));
error = ENETRESET;
}
break;
case WI_RID_OWN_CHNL:
if (wreq.wi_len != 1)
return EINVAL;
if (isclr(ic->ic_chan_active, wreq.wi_val[0]))
return EINVAL;
ic->ic_ibss_chan = wreq.wi_val[0];
if (ic->ic_flags & IEEE80211_F_SIBSS)
error = ENETRESET;
break;
case WI_RID_CURRENT_CHAN:
return EPERM;
case WI_RID_COMMS_QUALITY:
return EPERM;
case WI_RID_PROMISC:
if (wreq.wi_len != 1)
return EINVAL;
if (ifp->if_flags & IFF_PROMISC) {
if (wreq.wi_val[0] == 0) {
ifp->if_flags &= ~IFF_PROMISC;
error = ENETRESET;
}
} else {
if (wreq.wi_val[0] != 0) {
ifp->if_flags |= IFF_PROMISC;
error = ENETRESET;
}
}
break;
case WI_RID_PORTTYPE:
if (wreq.wi_len != 1)
return EINVAL;
switch (wreq.wi_val[0]) {
case 1:
if (ic->ic_flags & IEEE80211_F_ADHOC) {
ic->ic_flags &= ~IEEE80211_F_ADHOC;
error = ENETRESET;
}
break;
case 2:
if ((ic->ic_flags & IEEE80211_F_ADHOC) == 0) {
ic->ic_flags |= IEEE80211_F_ADHOC;
error = ENETRESET;
}
break;
default:
return EINVAL;
}
break;
case WI_RID_MAC_NODE:
/* XXX: should be implemented? */
return EPERM;
case WI_RID_TX_RATE:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] == 0) {
/* auto */
ic->ic_fixed_rate = -1;
break;
}
for (i = 0; i < IEEE80211_RATE_SIZE; i++) {
if (wreq.wi_val[0] ==
(ic->ic_sup_rates[i] & IEEE80211_RATE_VAL) / 2)
break;
}
if (i == IEEE80211_RATE_SIZE)
return EINVAL;
ic->ic_fixed_rate = i;
error = ENETRESET;
break;
case WI_RID_CUR_TX_RATE:
return EPERM;
break;
case WI_RID_RTS_THRESH:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] != IEEE80211_MAX_LEN)
return EINVAL; /* TODO: RTS */
break;
case WI_RID_CREATE_IBSS:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0]) {
if ((ic->ic_flags & IEEE80211_F_HASIBSS) == 0)
return EINVAL;
if ((ic->ic_flags & IEEE80211_F_IBSSON) == 0) {
ic->ic_flags |= IEEE80211_F_IBSSON;
if ((ic->ic_flags & IEEE80211_F_ADHOC) &&
ic->ic_state == IEEE80211_S_SCAN)
error = ENETRESET;
}
} else {
if (ic->ic_flags & IEEE80211_F_IBSSON) {
ic->ic_flags &= ~IEEE80211_F_IBSSON;
if (ic->ic_flags & IEEE80211_F_SIBSS) {
ic->ic_flags &= ~IEEE80211_F_SIBSS;
error = ENETRESET;
}
}
}
break;
case WI_RID_MICROWAVE_OVEN:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] != 0)
return EINVAL; /* not supported */
break;
case WI_RID_ROAMING_MODE:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] != 1)
return EINVAL; /* not supported */
break;
case WI_RID_SYSTEM_SCALE:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] != 1)
return EINVAL; /* not supported */
break;
case WI_RID_PM_ENABLED:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] != 0) {
if ((ic->ic_flags & IEEE80211_F_HASPMGT) == 0)
return EINVAL;
if ((ic->ic_flags & IEEE80211_F_PMGTON) == 0) {
ic->ic_flags |= IEEE80211_F_PMGTON;
error = ENETRESET;
}
} else {
if (ic->ic_flags & IEEE80211_F_PMGTON) {
ic->ic_flags &= ~IEEE80211_F_PMGTON;
error = ENETRESET;
}
}
break;
case WI_RID_MAX_SLEEP:
if (wreq.wi_len != 1)
return EINVAL;
ic->ic_lintval = wreq.wi_val[0];
break;
case WI_RID_WEP_AVAIL:
return EPERM;
case WI_RID_AUTH_CNTL:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] != 1)
return EINVAL; /* TODO: shared key auth */
break;
case WI_RID_ENCRYPTION:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0]) {
if ((ic->ic_flags & IEEE80211_F_HASWEP) == 0)
return EINVAL;
if ((ic->ic_flags & IEEE80211_F_WEPON) == 0) {
ic->ic_flags |= IEEE80211_F_WEPON;
error = ENETRESET;
}
} else {
if (ic->ic_flags & IEEE80211_F_WEPON) {
ic->ic_flags &= ~IEEE80211_F_WEPON;
error = ENETRESET;
}
}
break;
case WI_RID_TX_CRYPT_KEY:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] >= IEEE80211_WEP_NKID)
return EINVAL;
ic->ic_wep_txkey = wreq.wi_val[0];
break;
case WI_RID_DEFLT_CRYPT_KEYS:
if (wreq.wi_len != sizeof(struct wi_ltv_keys) / 2)
return EINVAL;
keys = (struct wi_ltv_keys *)&wreq;
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
if (keys->wi_keys[i].wi_keylen != 0 &&
keys->wi_keys[i].wi_keylen < IEEE80211_WEP_KEYLEN)
return EINVAL;
if (keys->wi_keys[i].wi_keylen >
sizeof(ic->ic_nw_keys[i].wk_key))
return EINVAL;
}
memset(ic->ic_nw_keys, 0, sizeof(ic->ic_nw_keys));
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
ic->ic_nw_keys[i].wk_len = keys->wi_keys[i].wi_keylen;
memcpy(ic->ic_nw_keys[i].wk_key,
keys->wi_keys[i].wi_keydat,
ic->ic_nw_keys[i].wk_len);
}
error = ENETRESET;
break;
case WI_RID_MAX_DATALEN:
if (wreq.wi_len != 1)
return EINVAL;
if (wreq.wi_val[0] < 350 /* ? */ ||
wreq.wi_val[0] > IEEE80211_MAX_LEN)
return EINVAL;
if (wreq.wi_val[0] != IEEE80211_MAX_LEN)
return EINVAL; /* TODO: fragment */
break;
case WI_RID_IFACE_STATS:
error = EPERM;
break;
default:
error = EINVAL;
break;
}
return error;
}
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