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freebsd-dev/sys/net80211/ieee80211_freebsd.h
Sam Leffler c1225b52f6 Split crypto tx+rx key indices and add a key index -> node mapping table: 
Crypto changes:
o change driver/net80211 key_alloc api to return tx+rx key indices; a
  driver can leave the rx key index set to IEEE80211_KEYIX_NONE or set
  it to be the same as the tx key index (the former disables use of
  the key index in building the keyix->node mapping table and is the
  default setup for naive drivers by null_key_alloc)
o add cs_max_keyid to crypto state to specify the max h/w key index a
  driver will return; this is used to allocate the key index mapping
  table and to bounds check table loookups
o while here introduce ieee80211_keyix (finally) for the type of a h/w
  key index
o change crypto notifiers for rx failures to pass the rx key index up
  as appropriate (michael failure, replay, etc.)

Node table changes:
o optionally allocate a h/w key index to node mapping table for the
  station table using the max key index setting supplied by drivers
  (note the scan table does not get a map)
o defer node table allocation to lateattach so the driver has a chance
  to set the max key id to size the key index map
o while here also defer the aid bitmap allocation
o add new ieee80211_find_rxnode_withkey api to find a sta/node entry
  on frame receive with an optional h/w key index to use in checking
  mapping table; also updates the map if it does a hash lookup and the
  found node has a rx key index set in the unicast key; note this work
  is separated from the old ieee80211_find_rxnode call so drivers do
  not need to be aware of the new mechanism
o move some node table manipulation under the node table lock to close
  a race on node delete
o add ieee80211_node_delucastkey to do the dirty work of deleting
  unicast key state for a node (deletes any key and handles key map
  references)

Ath driver:
o nuke private sc_keyixmap mechansim in favor of net80211 support
o update key alloc api

These changes close several race conditions for the ath driver operating
in ap mode.  Other drivers should see no change.  Station mode operation
for ath no longer uses the key index map but performance tests show no
noticeable change and this will be fixed when the scan table is eliminated
with the new scanning support.

Tested by:	Michal Mertl, avatar, others
Reviewed by:	avatar, others
MFC after:	2 weeks
2005-08-08 18:46:36 +00:00

229 lines
8.5 KiB
C
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/*-
* Copyright (c) 2003-2005 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _NET80211_IEEE80211_FREEBSD_H_
#define _NET80211_IEEE80211_FREEBSD_H_
/*
* Beacon locking definitions.
*/
typedef struct mtx ieee80211_beacon_lock_t;
#define IEEE80211_BEACON_LOCK_INIT(_ic, _name) \
mtx_init(&(_ic)->ic_beaconlock, _name, "802.11 beacon lock", MTX_DEF)
#define IEEE80211_BEACON_LOCK_DESTROY(_ic) mtx_destroy(&(_ic)->ic_beaconlock)
#define IEEE80211_BEACON_LOCK(_ic) mtx_lock(&(_ic)->ic_beaconlock)
#define IEEE80211_BEACON_UNLOCK(_ic) mtx_unlock(&(_ic)->ic_beaconlock)
#define IEEE80211_BEACON_LOCK_ASSERT(_ic) \
mtx_assert(&(_ic)->ic_beaconlock, MA_OWNED)
/*
* Node locking definitions.
* NB: MTX_DUPOK is because we don't generate per-interface strings.
*/
typedef struct mtx ieee80211_node_lock_t;
#define IEEE80211_NODE_LOCK_INIT(_nt, _name) \
mtx_init(&(_nt)->nt_nodelock, _name, "802.11 node table", \
MTX_DEF | MTX_DUPOK)
#define IEEE80211_NODE_LOCK_DESTROY(_nt) mtx_destroy(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_LOCK(_nt) mtx_lock(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_IS_LOCKED(_nt) mtx_owned(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_UNLOCK(_nt) mtx_unlock(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_LOCK_ASSERT(_nt) \
mtx_assert(&(_nt)->nt_nodelock, MA_OWNED)
/*
* Node table scangen locking definitions.
*/
typedef struct mtx ieee80211_scan_lock_t;
#define IEEE80211_SCAN_LOCK_INIT(_nt, _name) \
mtx_init(&(_nt)->nt_scanlock, _name, "802.11 scangen", MTX_DEF)
#define IEEE80211_SCAN_LOCK_DESTROY(_nt) mtx_destroy(&(_nt)->nt_scanlock)
#define IEEE80211_SCAN_LOCK(_nt) mtx_lock(&(_nt)->nt_scanlock)
#define IEEE80211_SCAN_UNLOCK(_nt) mtx_unlock(&(_nt)->nt_scanlock)
#define IEEE80211_SCAN_LOCK_ASSERT(_nt) \
mtx_assert(&(_nt)->nt_scanlock, MA_OWNED)
/*
* Per-node power-save queue definitions.
*/
#define IEEE80211_NODE_SAVEQ_INIT(_ni, _name) do { \
mtx_init(&(_ni)->ni_savedq.ifq_mtx, _name, "802.11 ps queue", MTX_DEF);\
(_ni)->ni_savedq.ifq_maxlen = IEEE80211_PS_MAX_QUEUE; \
} while (0)
#define IEEE80211_NODE_SAVEQ_DESTROY(_ni) \
mtx_destroy(&(_ni)->ni_savedq.ifq_mtx)
#define IEEE80211_NODE_SAVEQ_QLEN(_ni) \
_IF_QLEN(&(_ni)->ni_savedq)
#define IEEE80211_NODE_SAVEQ_LOCK(_ni) do { \
IF_LOCK(&(_ni)->ni_savedq); \
} while (0)
#define IEEE80211_NODE_SAVEQ_UNLOCK(_ni) do { \
IF_UNLOCK(&(_ni)->ni_savedq); \
} while (0)
#define IEEE80211_NODE_SAVEQ_DEQUEUE(_ni, _m, _qlen) do { \
IEEE80211_NODE_SAVEQ_LOCK(_ni); \
_IF_DEQUEUE(&(_ni)->ni_savedq, _m); \
(_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni); \
IEEE80211_NODE_SAVEQ_UNLOCK(_ni); \
} while (0)
#define IEEE80211_NODE_SAVEQ_DRAIN(_ni, _qlen) do { \
IEEE80211_NODE_SAVEQ_LOCK(_ni); \
(_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni); \
_IF_DRAIN(&(_ni)->ni_savedq); \
IEEE80211_NODE_SAVEQ_UNLOCK(_ni); \
} while (0)
/* XXX could be optimized */
#define _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(_ni, _m) do { \
_IF_DEQUEUE(&(_ni)->ni_savedq, m); \
} while (0)
#define _IEEE80211_NODE_SAVEQ_ENQUEUE(_ni, _m, _qlen, _age) do {\
(_m)->m_nextpkt = NULL; \
if ((_ni)->ni_savedq.ifq_tail != NULL) { \
_age -= M_AGE_GET((_ni)->ni_savedq.ifq_tail); \
(_ni)->ni_savedq.ifq_tail->m_nextpkt = (_m); \
} else { \
(_ni)->ni_savedq.ifq_head = (_m); \
} \
M_AGE_SET(_m, _age); \
(_ni)->ni_savedq.ifq_tail = (_m); \
(_qlen) = ++(_ni)->ni_savedq.ifq_len; \
} while (0)
/*
* 802.1x MAC ACL database locking definitions.
*/
typedef struct mtx acl_lock_t;
#define ACL_LOCK_INIT(_as, _name) \
mtx_init(&(_as)->as_lock, _name, "802.11 ACL", MTX_DEF)
#define ACL_LOCK_DESTROY(_as) mtx_destroy(&(_as)->as_lock)
#define ACL_LOCK(_as) mtx_lock(&(_as)->as_lock)
#define ACL_UNLOCK(_as) mtx_unlock(&(_as)->as_lock)
#define ACL_LOCK_ASSERT(_as) \
mtx_assert((&(_as)->as_lock), MA_OWNED)
/*
* Node reference counting definitions.
*
* ieee80211_node_initref initialize the reference count to 1
* ieee80211_node_incref add a reference
* ieee80211_node_decref remove a reference
* ieee80211_node_dectestref remove a reference and return 1 if this
* is the last reference, otherwise 0
* ieee80211_node_refcnt reference count for printing (only)
*/
#include <machine/atomic.h>
#define ieee80211_node_initref(_ni) \
do { ((_ni)->ni_refcnt = 1); } while (0)
#define ieee80211_node_incref(_ni) \
atomic_add_int(&(_ni)->ni_refcnt, 1)
#define ieee80211_node_decref(_ni) \
atomic_subtract_int(&(_ni)->ni_refcnt, 1)
struct ieee80211_node;
int ieee80211_node_dectestref(struct ieee80211_node *ni);
#define ieee80211_node_refcnt(_ni) (_ni)->ni_refcnt
struct mbuf *ieee80211_getmgtframe(u_int8_t **frm, u_int pktlen);
#define M_LINK0 M_PROTO1 /* WEP requested */
#define M_PWR_SAV M_PROTO4 /* bypass PS handling */
#define M_MORE_DATA M_PROTO5 /* more data frames to follow */
/*
* Encode WME access control bits in the PROTO flags.
* This is safe since it's passed directly in to the
* driver and there's no chance someone else will clobber
* them on us.
*/
#define M_WME_AC_MASK (M_PROTO2|M_PROTO3)
/* XXX 5 is wrong if M_PROTO* are redefined */
#define M_WME_AC_SHIFT 5
#define M_WME_SETAC(m, ac) \
((m)->m_flags = ((m)->m_flags &~ M_WME_AC_MASK) | \
((ac) << M_WME_AC_SHIFT))
#define M_WME_GETAC(m) (((m)->m_flags >> M_WME_AC_SHIFT) & 0x3)
/*
* Mbufs on the power save queue are tagged with an age and
* timed out. We reuse the hardware checksum field in the
* mbuf packet header to store this data.
*/
#define M_AGE_SET(m,v) (m->m_pkthdr.csum_data = v)
#define M_AGE_GET(m) (m->m_pkthdr.csum_data)
#define M_AGE_SUB(m,adj) (m->m_pkthdr.csum_data -= adj)
void get_random_bytes(void *, size_t);
struct ieee80211com;
void ieee80211_sysctl_attach(struct ieee80211com *);
void ieee80211_sysctl_detach(struct ieee80211com *);
void ieee80211_load_module(const char *);
/* XXX this stuff belongs elsewhere */
/*
* Message formats for messages from the net80211 layer to user
* applications via the routing socket. These messages are appended
* to an if_announcemsghdr structure.
*/
struct ieee80211_join_event {
uint8_t iev_addr[6];
};
struct ieee80211_leave_event {
uint8_t iev_addr[6];
};
struct ieee80211_replay_event {
uint8_t iev_src[6]; /* src MAC */
uint8_t iev_dst[6]; /* dst MAC */
uint8_t iev_cipher; /* cipher type */
uint8_t iev_keyix; /* key id/index */
uint64_t iev_keyrsc; /* RSC from key */
uint64_t iev_rsc; /* RSC from frame */
};
struct ieee80211_michael_event {
uint8_t iev_src[6]; /* src MAC */
uint8_t iev_dst[6]; /* dst MAC */
uint8_t iev_cipher; /* cipher type */
uint8_t iev_keyix; /* key id/index */
};
#define RTM_IEEE80211_ASSOC 100 /* station associate (bss mode) */
#define RTM_IEEE80211_REASSOC 101 /* station re-associate (bss mode) */
#define RTM_IEEE80211_DISASSOC 102 /* station disassociate (bss mode) */
#define RTM_IEEE80211_JOIN 103 /* station join (ap mode) */
#define RTM_IEEE80211_LEAVE 104 /* station leave (ap mode) */
#define RTM_IEEE80211_SCAN 105 /* scan complete, results available */
#define RTM_IEEE80211_REPLAY 106 /* sequence counter replay detected */
#define RTM_IEEE80211_MICHAEL 107 /* Michael MIC failure detected */
#define RTM_IEEE80211_REJOIN 108 /* station re-associate (ap mode) */
#endif /* _NET80211_IEEE80211_FREEBSD_H_ */
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