xref: /src/sbin/ifconfig/ieee80211.c

/*	$NetBSD: ieee80211.c,v 1.8 2007/01/09 09:19:02 dyoung Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: ieee80211.c,v 1.8 2007/01/09 09:19:02 dyoung Exp $");
#endif /* not lint */

#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>

#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#include <net80211/ieee80211.h>
#include <net80211/ieee80211_ioctl.h>

#include <ctype.h>
#include <err.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <util.h>

#include "extern.h"
#include "ieee80211.h"

static void set80211(int, int, int, uint8_t *);

static void
set80211(int type, int val, int len, u_int8_t *data)
{
	struct ieee80211req	ireq;

	(void) memset(&ireq, 0, sizeof(ireq));
	estrlcpy(ireq.i_name, name, sizeof(ireq.i_name));
	ireq.i_type = type;
	ireq.i_val = val;
	ireq.i_len = len;
	ireq.i_data = data;
	if (ioctl(s, SIOCS80211, &ireq) < 0)
		err(1, "SIOCS80211");
}

void
sethidessid(const char *val, int d)
{
	set80211(IEEE80211_IOC_HIDESSID, d, 0, NULL);
}

void
setapbridge(const char *val, int d)
{
	set80211(IEEE80211_IOC_APBRIDGE, d, 0, NULL);
}

static enum ieee80211_opmode
get80211opmode(void)
{
	struct ifmediareq ifmr;

	(void) memset(&ifmr, 0, sizeof(ifmr));
	estrlcpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
	if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) >= 0) {
		if (ifmr.ifm_current & IFM_IEEE80211_ADHOC)
			return IEEE80211_M_IBSS;        /* XXX ahdemo */
		if (ifmr.ifm_current & IFM_IEEE80211_HOSTAP)
			return IEEE80211_M_HOSTAP;
		if (ifmr.ifm_current & IFM_IEEE80211_MONITOR)
			return IEEE80211_M_MONITOR;
	}

	return IEEE80211_M_STA;
}

void
setifnwid(const char *val, int d)
{
	struct ieee80211_nwid nwid;
	int len;

	len = sizeof(nwid.i_nwid);
	if (get_string(val, NULL, nwid.i_nwid, &len) == NULL)
		return;
	nwid.i_len = len;
	estrlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
	ifr.ifr_data = (void *)&nwid;
	if (ioctl(s, SIOCS80211NWID, &ifr) == -1)
		warn("SIOCS80211NWID");
}

void
setifbssid(const char *val, int d)
{
	struct ieee80211_bssid bssid;
	struct ether_addr *ea;

	if (d != 0) {
		/* no BSSID is especially desired */
		memset(&bssid.i_bssid, 0, sizeof(bssid.i_bssid));
	} else {
		ea = ether_aton(val);
		if (ea == NULL) {
			warnx("malformed BSSID: %s", val);
			return;
		}
		memcpy(&bssid.i_bssid, ea->ether_addr_octet,
		    sizeof(bssid.i_bssid));
	}
	estrlcpy(bssid.i_name, name, sizeof(bssid.i_name));
	if (ioctl(s, SIOCS80211BSSID, &bssid) == -1)
		warn("SIOCS80211BSSID");
}

void
setiffrag(const char *val, int d)
{
	struct ieee80211req ireq;
	int thr;

	if (d != 0)
		thr = IEEE80211_FRAG_MAX;
	else {
		thr = atoi(val);
		if (thr < IEEE80211_FRAG_MIN || thr > IEEE80211_FRAG_MAX) {
			errx(EXIT_FAILURE, "invalid fragmentation threshold: %s", val);
			return;
		}
	}

	(void)strncpy(ireq.i_name, name, sizeof(ireq.i_name));
	ireq.i_type = IEEE80211_IOC_FRAGTHRESHOLD;
	ireq.i_val = thr;
	if (ioctl(s, SIOCS80211, &ireq) == -1)
		err(EXIT_FAILURE, "IEEE80211_IOC_FRAGTHRESHOLD");
}

void
setifchan(const char *val, int d)
{
	struct ieee80211chanreq channel;
	int chan;

	if (d != 0)
		chan = IEEE80211_CHAN_ANY;
	else {
		chan = atoi(val);
		if (chan < 0 || chan > 0xffff) {
			warnx("invalid channel: %s", val);
			return;
		}
	}

	estrlcpy(channel.i_name, name, sizeof(channel.i_name));
	channel.i_channel = (u_int16_t) chan;
	if (ioctl(s, SIOCS80211CHANNEL, &channel) == -1)
		warn("SIOCS80211CHANNEL");
}

void
setifnwkey(const char *val, int d)
{
	struct ieee80211_nwkey nwkey;
	int i;
	u_int8_t keybuf[IEEE80211_WEP_NKID][16];

	nwkey.i_wepon = IEEE80211_NWKEY_WEP;
	nwkey.i_defkid = 1;
	for (i = 0; i < IEEE80211_WEP_NKID; i++) {
		nwkey.i_key[i].i_keylen = sizeof(keybuf[i]);
		nwkey.i_key[i].i_keydat = keybuf[i];
	}
	if (d != 0) {
		/* disable WEP encryption */
		nwkey.i_wepon = 0;
		i = 0;
	} else if (strcasecmp("persist", val) == 0) {
		/* use all values from persistent memory */
		nwkey.i_wepon |= IEEE80211_NWKEY_PERSIST;
		nwkey.i_defkid = 0;
		for (i = 0; i < IEEE80211_WEP_NKID; i++)
			nwkey.i_key[i].i_keylen = -1;
	} else if (strncasecmp("persist:", val, 8) == 0) {
		val += 8;
		/* program keys in persistent memory */
		nwkey.i_wepon |= IEEE80211_NWKEY_PERSIST;
		goto set_nwkey;
	} else {
  set_nwkey:
		if (isdigit((unsigned char)val[0]) && val[1] == ':') {
			/* specifying a full set of four keys */
			nwkey.i_defkid = val[0] - '0';
			val += 2;
			for (i = 0; i < IEEE80211_WEP_NKID; i++) {
				val = get_string(val, ",", keybuf[i],
				    &nwkey.i_key[i].i_keylen);
				if (val == NULL)
					return;
			}
			if (*val != '\0') {
				warnx("SIOCS80211NWKEY: too many keys.");
				return;
			}
		} else {
			val = get_string(val, NULL, keybuf[0],
			    &nwkey.i_key[0].i_keylen);
			if (val == NULL)
				return;
			i = 1;
		}
	}
	for (; i < IEEE80211_WEP_NKID; i++)
		nwkey.i_key[i].i_keylen = 0;
	estrlcpy(nwkey.i_name, name, sizeof(nwkey.i_name));
	if (ioctl(s, SIOCS80211NWKEY, &nwkey) == -1)
		warn("SIOCS80211NWKEY");
}

void
setifpowersave(const char *val, int d)
{
	struct ieee80211_power power;

	estrlcpy(power.i_name, name, sizeof(power.i_name));
	if (ioctl(s, SIOCG80211POWER, &power) == -1) {
		warn("SIOCG80211POWER");
		return;
	}

	power.i_enabled = d;
	if (ioctl(s, SIOCS80211POWER, &power) == -1)
		warn("SIOCS80211POWER");
}

void
setifpowersavesleep(const char *val, int d)
{
	struct ieee80211_power power;

	estrlcpy(power.i_name, name, sizeof(power.i_name));
	if (ioctl(s, SIOCG80211POWER, &power) == -1) {
		warn("SIOCG80211POWER");
		return;
	}

	power.i_maxsleep = atoi(val);
	if (ioctl(s, SIOCS80211POWER, &power) == -1)
		warn("SIOCS80211POWER");
}

void
ieee80211_statistics(void)
{
	struct ieee80211_stats stats;

	memset(&ifr, 0, sizeof(ifr));
	ifr.ifr_buflen = sizeof(stats);
	ifr.ifr_buf = (caddr_t)&stats;
	estrlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
	if (ioctl(s, (zflag) ? SIOCG80211ZSTATS : SIOCG80211STATS,
	    (caddr_t)&ifr) == -1)
		return;
#define	STAT_PRINT(_member, _desc)	\
	printf("\t" _desc ": %" PRIu32 "\n", stats._member)

	STAT_PRINT(is_rx_badversion, "rx frame with bad version");
	STAT_PRINT(is_rx_tooshort, "rx frame too short");
	STAT_PRINT(is_rx_wrongbss, "rx from wrong bssid");
	STAT_PRINT(is_rx_dup, "rx discard 'cuz dup");
	STAT_PRINT(is_rx_wrongdir, "rx w/ wrong direction");
	STAT_PRINT(is_rx_mcastecho, "rx discard 'cuz mcast echo");
	STAT_PRINT(is_rx_notassoc, "rx discard 'cuz sta !assoc");
	STAT_PRINT(is_rx_noprivacy, "rx w/ wep but privacy off");
	STAT_PRINT(is_rx_unencrypted, "rx w/o wep and privacy on");
	STAT_PRINT(is_rx_wepfail, "rx wep processing failed");
	STAT_PRINT(is_rx_decap, "rx decapsulation failed");
	STAT_PRINT(is_rx_mgtdiscard, "rx discard mgt frames");
	STAT_PRINT(is_rx_ctl, "rx discard ctrl frames");
	STAT_PRINT(is_rx_beacon, "rx beacon frames");
	STAT_PRINT(is_rx_rstoobig, "rx rate set truncated");
	STAT_PRINT(is_rx_elem_missing, "rx required element missin");
	STAT_PRINT(is_rx_elem_toobig, "rx element too big");
	STAT_PRINT(is_rx_elem_toosmall, "rx element too small");
	STAT_PRINT(is_rx_elem_unknown, "rx element unknown");
	STAT_PRINT(is_rx_badchan, "rx frame w/ invalid chan");
	STAT_PRINT(is_rx_chanmismatch, "rx frame chan mismatch");
	STAT_PRINT(is_rx_nodealloc, "rx frame dropped");
	STAT_PRINT(is_rx_ssidmismatch, "rx frame ssid mismatch ");
	STAT_PRINT(is_rx_auth_unsupported, "rx w/ unsupported auth alg");
	STAT_PRINT(is_rx_auth_fail, "rx sta auth failure");
	STAT_PRINT(is_rx_auth_countermeasures, "rx auth discard 'cuz CM");
	STAT_PRINT(is_rx_assoc_bss, "rx assoc from wrong bssid");
	STAT_PRINT(is_rx_assoc_notauth, "rx assoc w/o auth");
	STAT_PRINT(is_rx_assoc_capmismatch, "rx assoc w/ cap mismatch");
	STAT_PRINT(is_rx_assoc_norate, "rx assoc w/ no rate match");
	STAT_PRINT(is_rx_assoc_badwpaie, "rx assoc w/ bad WPA IE");
	STAT_PRINT(is_rx_deauth, "rx deauthentication");
	STAT_PRINT(is_rx_disassoc, "rx disassociation");
	STAT_PRINT(is_rx_badsubtype, "rx frame w/ unknown subtyp");
	STAT_PRINT(is_rx_nobuf, "rx failed for lack of buf");
	STAT_PRINT(is_rx_decryptcrc, "rx decrypt failed on crc");
	STAT_PRINT(is_rx_ahdemo_mgt, "rx discard ahdemo mgt fram");
	STAT_PRINT(is_rx_bad_auth, "rx bad auth request");
	STAT_PRINT(is_rx_unauth, "rx on unauthorized port");
	STAT_PRINT(is_rx_badkeyid, "rx w/ incorrect keyid");
	STAT_PRINT(is_rx_ccmpreplay, "rx seq# violation (CCMP)");
	STAT_PRINT(is_rx_ccmpformat, "rx format bad (CCMP)");
	STAT_PRINT(is_rx_ccmpmic, "rx MIC check failed (CCMP)");
	STAT_PRINT(is_rx_tkipreplay, "rx seq# violation (TKIP)");
	STAT_PRINT(is_rx_tkipformat, "rx format bad (TKIP)");
	STAT_PRINT(is_rx_tkipmic, "rx MIC check failed (TKIP)");
	STAT_PRINT(is_rx_tkipicv, "rx ICV check failed (TKIP)");
	STAT_PRINT(is_rx_badcipher, "rx failed 'cuz key type");
	STAT_PRINT(is_rx_nocipherctx, "rx failed 'cuz key !setup");
	STAT_PRINT(is_rx_acl, "rx discard 'cuz acl policy");

	STAT_PRINT(is_tx_nobuf, "tx failed for lack of buf");
	STAT_PRINT(is_tx_nonode, "tx failed for no node");
	STAT_PRINT(is_tx_unknownmgt, "tx of unknown mgt frame");
	STAT_PRINT(is_tx_badcipher, "tx failed 'cuz key type");
	STAT_PRINT(is_tx_nodefkey, "tx failed 'cuz no defkey");
	STAT_PRINT(is_tx_noheadroom, "tx failed 'cuz no space");

	STAT_PRINT(is_scan_active, "active scans started");
	STAT_PRINT(is_scan_passive, "passive scans started");
	STAT_PRINT(is_node_timeout, "nodes timed out inactivity");
	STAT_PRINT(is_crypto_nomem, "no memory for crypto ctx");
	STAT_PRINT(is_crypto_tkip, "tkip crypto done in s/w");
	STAT_PRINT(is_crypto_tkipenmic, "tkip en-MIC done in s/w");
	STAT_PRINT(is_crypto_tkipdemic, "tkip de-MIC done in s/w");
	STAT_PRINT(is_crypto_tkipcm, "tkip counter measures");
	STAT_PRINT(is_crypto_ccmp, "ccmp crypto done in s/w");
	STAT_PRINT(is_crypto_wep, "wep crypto done in s/w");
	STAT_PRINT(is_crypto_setkey_cipher, "cipher rejected key");
	STAT_PRINT(is_crypto_setkey_nokey, "no key index for setkey");
	STAT_PRINT(is_crypto_delkey, "driver key delete failed");
	STAT_PRINT(is_crypto_badcipher, "unknown cipher");
	STAT_PRINT(is_crypto_nocipher, "cipher not available");
	STAT_PRINT(is_crypto_attachfail, "cipher attach failed");
	STAT_PRINT(is_crypto_swfallback, "cipher fallback to s/w");
	STAT_PRINT(is_crypto_keyfail, "driver key alloc failed");
	STAT_PRINT(is_crypto_enmicfail, "en-MIC failed");
	STAT_PRINT(is_ibss_capmismatch, "merge failed-cap mismatch");
	STAT_PRINT(is_ibss_norate, "merge failed-rate mismatch");
	STAT_PRINT(is_ps_unassoc, "ps-poll for unassoc. sta");
	STAT_PRINT(is_ps_badaid, "ps-poll w/ incorrect aid");
	STAT_PRINT(is_ps_qempty, "ps-poll w/ nothing to send");
}

void
ieee80211_status(void)
{
	int i, nwkey_verbose;
	struct ieee80211_nwid nwid;
	struct ieee80211_nwkey nwkey;
	struct ieee80211_power power;
	u_int8_t keybuf[IEEE80211_WEP_NKID][16];
	struct ieee80211_bssid bssid;
	struct ieee80211chanreq channel;
	struct ieee80211req ireq;
	struct ether_addr ea;
	static const u_int8_t zero_macaddr[IEEE80211_ADDR_LEN];
	enum ieee80211_opmode opmode = get80211opmode();
	extern int vflag;

	memset(&ifr, 0, sizeof(ifr));
	ifr.ifr_data = (void *)&nwid;
	estrlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
	if (ioctl(s, SIOCG80211NWID, &ifr) == -1)
		return;
	if (nwid.i_len > IEEE80211_NWID_LEN) {
		warnx("SIOCG80211NWID: wrong length of nwid (%d)", nwid.i_len);
		return;
	}
	printf("\tssid ");
	print_string(nwid.i_nwid, nwid.i_len);

	if (opmode == IEEE80211_M_HOSTAP) {
		estrlcpy(ireq.i_name, name, sizeof(ireq.i_name));
		ireq.i_type = IEEE80211_IOC_HIDESSID;
		if (ioctl(s, SIOCG80211, &ireq) != -1) {
                        if (ireq.i_val)
                                printf(" [hidden]");
                        else if (vflag)
                                printf(" [shown]");
                }

		ireq.i_type = IEEE80211_IOC_APBRIDGE;
		if (ioctl(s, SIOCG80211, &ireq) != -1) {
			if (ireq.i_val)
				printf(" apbridge");
			else if (vflag)
				printf(" -apbridge");
		}
        }

	estrlcpy(ireq.i_name, name, sizeof(ireq.i_name));
	ireq.i_type = IEEE80211_IOC_FRAGTHRESHOLD;
	if (ioctl(s, SIOCG80211, &ireq) == -1)
		;
	else if (ireq.i_val < IEEE80211_FRAG_MAX)
		printf(" frag %d", ireq.i_val);
	else if (vflag)
		printf(" -frag");

	memset(&nwkey, 0, sizeof(nwkey));
	estrlcpy(nwkey.i_name, name, sizeof(nwkey.i_name));
	/* show nwkey only when WEP is enabled */
	if (ioctl(s, SIOCG80211NWKEY, &nwkey) == -1 ||
	    nwkey.i_wepon == 0) {
		printf("\n");
		goto skip_wep;
	}

	printf(" nwkey ");
	/* try to retrieve WEP keys */
	for (i = 0; i < IEEE80211_WEP_NKID; i++) {
		nwkey.i_key[i].i_keydat = keybuf[i];
		nwkey.i_key[i].i_keylen = sizeof(keybuf[i]);
	}
	if (ioctl(s, SIOCG80211NWKEY, &nwkey) == -1) {
		printf("*****");
	} else {
		nwkey_verbose = 0;
		/* check to see non default key or multiple keys defined */
		if (nwkey.i_defkid != 1) {
			nwkey_verbose = 1;
		} else {
			for (i = 1; i < IEEE80211_WEP_NKID; i++) {
				if (nwkey.i_key[i].i_keylen != 0) {
					nwkey_verbose = 1;
					break;
				}
			}
		}
		/* check extra ambiguity with keywords */
		if (!nwkey_verbose) {
			if (nwkey.i_key[0].i_keylen >= 2 &&
			    isdigit(nwkey.i_key[0].i_keydat[0]) &&
			    nwkey.i_key[0].i_keydat[1] == ':')
				nwkey_verbose = 1;
			else if (nwkey.i_key[0].i_keylen >= 7 &&
			    strncasecmp("persist",
			    (const char *)nwkey.i_key[0].i_keydat, 7) == 0)
				nwkey_verbose = 1;
		}
		if (nwkey_verbose)
			printf("%d:", nwkey.i_defkid);
		for (i = 0; i < IEEE80211_WEP_NKID; i++) {
			if (i > 0)
				printf(",");
			if (nwkey.i_key[i].i_keylen < 0)
				printf("persist");
			else
				print_string(nwkey.i_key[i].i_keydat,
				    nwkey.i_key[i].i_keylen);
			if (!nwkey_verbose)
				break;
		}
	}
	printf("\n");

 skip_wep:
	estrlcpy(power.i_name, name, sizeof(power.i_name));
	if (ioctl(s, SIOCG80211POWER, &power) == -1)
		goto skip_power;
	printf("\tpowersave ");
	if (power.i_enabled)
		printf("on (%dms sleep)", power.i_maxsleep);
	else
		printf("off");
	printf("\n");

 skip_power:
	estrlcpy(bssid.i_name, name, sizeof(bssid.i_name));
	if (ioctl(s, SIOCG80211BSSID, &bssid) == -1)
		return;
	estrlcpy(channel.i_name, name, sizeof(channel.i_name));
	if (ioctl(s, SIOCG80211CHANNEL, &channel) == -1)
		return;
	if (memcmp(bssid.i_bssid, zero_macaddr, IEEE80211_ADDR_LEN) == 0) {
		if (channel.i_channel != (u_int16_t)-1)
			printf("\tchan %d\n", channel.i_channel);
	} else {
		memcpy(ea.ether_addr_octet, bssid.i_bssid,
		    sizeof(ea.ether_addr_octet));
		printf("\tbssid %s", ether_ntoa(&ea));
		if (channel.i_channel != IEEE80211_CHAN_ANY)
			printf(" chan %d", channel.i_channel);
		printf("\n");
	}
}