| ieee80211.c (194760) | ieee80211.c (195379) |
|---|---|
| 1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: --- 11 unchanged lines hidden (view full) --- 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: --- 11 unchanged lines hidden (view full) --- 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> |
| 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 194760 2009-06-23 20:19:09Z rwatson $"); | 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 195379 2009-07-05 18:17:37Z sam $"); |
| 29 30/* 31 * IEEE 802.11 generic handler 32 */ 33#include "opt_wlan.h" 34 35#include <sys/param.h> 36#include <sys/systm.h> --- 226 unchanged lines hidden (view full) --- 263 * available channels as active, and pick a default 264 * channel if not already specified. 265 */ 266 ieee80211_media_init(ic); 267 268 ic->ic_update_mcast = null_update_mcast; 269 ic->ic_update_promisc = null_update_promisc; 270 | 29 30/* 31 * IEEE 802.11 generic handler 32 */ 33#include "opt_wlan.h" 34 35#include <sys/param.h> 36#include <sys/systm.h> --- 226 unchanged lines hidden (view full) --- 263 * available channels as active, and pick a default 264 * channel if not already specified. 265 */ 266 ieee80211_media_init(ic); 267 268 ic->ic_update_mcast = null_update_mcast; 269 ic->ic_update_promisc = null_update_promisc; 270 |
| 271 ic->ic_hash_key = arc4random(); |
|
| 271 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 272 ic->ic_lintval = ic->ic_bintval; 273 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 274 275 ieee80211_crypto_attach(ic); 276 ieee80211_node_attach(ic); 277 ieee80211_power_attach(ic); 278 ieee80211_proto_attach(ic); --- 1284 unchanged lines hidden (view full) --- 1563 9, /* IFM_IEEE80211_OFDM4 */ 1564 54, /* IFM_IEEE80211_OFDM27 */ 1565 -1, /* IFM_IEEE80211_MCS */ 1566 }; 1567 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1568 ieeerates[IFM_SUBTYPE(mword)] : 0; 1569#undef N 1570} | 272 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 273 ic->ic_lintval = ic->ic_bintval; 274 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 275 276 ieee80211_crypto_attach(ic); 277 ieee80211_node_attach(ic); 278 ieee80211_power_attach(ic); 279 ieee80211_proto_attach(ic); --- 1284 unchanged lines hidden (view full) --- 1564 9, /* IFM_IEEE80211_OFDM4 */ 1565 54, /* IFM_IEEE80211_OFDM27 */ 1566 -1, /* IFM_IEEE80211_MCS */ 1567 }; 1568 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1569 ieeerates[IFM_SUBTYPE(mword)] : 0; 1570#undef N 1571} |
| 1572 1573/* 1574 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1575 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1576 */ 1577#define mix(a, b, c) \ 1578do { \ 1579 a -= b; a -= c; a ^= (c >> 13); \ 1580 b -= c; b -= a; b ^= (a << 8); \ 1581 c -= a; c -= b; c ^= (b >> 13); \ 1582 a -= b; a -= c; a ^= (c >> 12); \ 1583 b -= c; b -= a; b ^= (a << 16); \ 1584 c -= a; c -= b; c ^= (b >> 5); \ 1585 a -= b; a -= c; a ^= (c >> 3); \ 1586 b -= c; b -= a; b ^= (a << 10); \ 1587 c -= a; c -= b; c ^= (b >> 15); \ 1588} while (/*CONSTCOND*/0) 1589 1590uint32_t 1591ieee80211_mac_hash(const struct ieee80211com *ic, 1592 const uint8_t addr[IEEE80211_ADDR_LEN]) 1593{ 1594 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1595 1596 b += addr[5] << 8; 1597 b += addr[4]; 1598 a += addr[3] << 24; 1599 a += addr[2] << 16; 1600 a += addr[1] << 8; 1601 a += addr[0]; 1602 1603 mix(a, b, c); 1604 1605 return c; 1606} 1607#undef mix |
|