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Name	Size	Permission	Date
9p	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
bluetooth	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
caif	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
iucv	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
mana	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
netfilter	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
netns	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
nfc	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
page_pool	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
phonet	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
sctp	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
tc_act	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
6lowpan.h	10.03 KB	-rw-r--r--	2024-03-10 20:38
Space.h	455 B	-rw-r--r--	2024-03-10 20:38
act_api.h	9.27 KB	-rw-r--r--	2024-03-10 20:38
addrconf.h	14.28 KB	-rw-r--r--	2026-05-26 09:55
af_ieee802154.h	1.19 KB	-rw-r--r--	2024-03-10 20:38
af_rxrpc.h	3.3 KB	-rw-r--r--	2024-03-10 20:38
af_unix.h	3.76 KB	-rw-r--r--	2026-05-26 09:55
af_vsock.h	8.41 KB	-rw-r--r--	2026-05-26 09:55
ah.h	382 B	-rw-r--r--	2024-03-10 20:38
amt.h	8.35 KB	-rw-r--r--	2024-03-10 20:38
arp.h	1.95 KB	-rw-r--r--	2024-03-10 20:38
atmclip.h	1.48 KB	-rw-r--r--	2024-03-10 20:38
ax25.h	14.94 KB	-rw-r--r--	2026-05-26 09:55
ax88796.h	1.43 KB	-rw-r--r--	2024-03-10 20:38
bareudp.h	333 B	-rw-r--r--	2024-03-10 20:38
bond_3ad.h	9.48 KB	-rw-r--r--	2026-05-26 09:55
bond_alb.h	6.1 KB	-rw-r--r--	2024-03-10 20:38
bond_options.h	4.83 KB	-rw-r--r--	2026-05-26 09:55
bonding.h	21.37 KB	-rw-r--r--	2026-05-26 09:55
bpf_sk_storage.h	1.74 KB	-rw-r--r--	2024-03-10 20:38
busy_poll.h	4.28 KB	-rw-r--r--	2026-05-26 09:55
calipso.h	1.55 KB	-rw-r--r--	2024-03-10 20:38
cfg80211-wext.h	1.86 KB	-rw-r--r--	2024-03-10 20:38
cfg80211.h	336.64 KB	-rw-r--r--	2026-05-26 09:55
cfg802154.h	16.68 KB	-rw-r--r--	2026-05-26 09:55
checksum.h	4.98 KB	-rw-r--r--	2026-05-26 09:55
cipso_ipv4.h	7.37 KB	-rw-r--r--	2024-03-10 20:38
cls_cgroup.h	2.04 KB	-rw-r--r--	2026-05-26 09:55
codel.h	5.86 KB	-rw-r--r--	2024-03-10 20:38
codel_impl.h	8.3 KB	-rw-r--r--	2024-03-10 20:38
codel_qdisc.h	2.95 KB	-rw-r--r--	2024-03-10 20:38
compat.h	2.48 KB	-rw-r--r--	2024-03-10 20:38
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dcbevent.h	766 B	-rw-r--r--	2024-03-10 20:38
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devlink.h	70.92 KB	-rw-r--r--	2024-03-10 20:38
dropreason-core.h	14.76 KB	-rw-r--r--	2026-05-26 09:55
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dsa.h	41.05 KB	-rw-r--r--	2026-05-26 09:55
dsa_stubs.h	1.28 KB	-rw-r--r--	2024-03-10 20:38
dsfield.h	1.12 KB	-rw-r--r--	2024-03-10 20:38
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dst_cache.h	2.96 KB	-rw-r--r--	2024-03-10 20:38
dst_metadata.h	6.34 KB	-rw-r--r--	2024-03-10 20:38
dst_ops.h	2.07 KB	-rw-r--r--	2026-05-26 09:55
erspan.h	9.04 KB	-rw-r--r--	2024-03-10 20:38
esp.h	1.18 KB	-rw-r--r--	2024-03-10 20:38
espintcp.h	966 B	-rw-r--r--	2024-03-10 20:38
ethoc.h	439 B	-rw-r--r--	2024-03-10 20:38
failover.h	1.18 KB	-rw-r--r--	2024-03-10 20:38
fib_notifier.h	1.35 KB	-rw-r--r--	2024-03-10 20:38
fib_rules.h	5.39 KB	-rw-r--r--	2024-03-10 20:38
firewire.h	599 B	-rw-r--r--	2024-03-10 20:38
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garp.h	2.67 KB	-rw-r--r--	2024-03-10 20:38
gen_stats.h	2.99 KB	-rw-r--r--	2024-03-10 20:38
genetlink.h	19.62 KB	-rw-r--r--	2026-05-26 09:55
geneve.h	1.84 KB	-rw-r--r--	2024-03-10 20:38
gre.h	3.29 KB	-rw-r--r--	2024-03-10 20:38
gro.h	13.38 KB	-rw-r--r--	2026-05-26 09:55
gro_cells.h	443 B	-rw-r--r--	2024-03-10 20:38
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gtp.h	1.46 KB	-rw-r--r--	2024-03-10 20:38
gue.h	3.29 KB	-rw-r--r--	2024-03-10 20:38
handshake.h	1.39 KB	-rw-r--r--	2024-03-10 20:38
hwbm.h	995 B	-rw-r--r--	2024-03-10 20:38
icmp.h	1.87 KB	-rw-r--r--	2024-03-10 20:38
ieee80211_radiotap.h	23.22 KB	-rw-r--r--	2026-05-26 09:55
ieee802154_netdev.h	13.02 KB	-rw-r--r--	2024-03-10 20:38
if_inet6.h	6.6 KB	-rw-r--r--	2024-03-10 20:38
ife.h	1.03 KB	-rw-r--r--	2024-03-10 20:38
inet6_connection_sock.h	794 B	-rw-r--r--	2024-03-10 20:38
inet6_hashtables.h	5.57 KB	-rw-r--r--	2026-05-26 09:55
inet_common.h	2.83 KB	-rw-r--r--	2024-03-10 20:38
inet_connection_sock.h	11.7 KB	-rw-r--r--	2026-05-26 09:55
inet_dscp.h	1.55 KB	-rw-r--r--	2024-03-10 20:38
inet_ecn.h	7.83 KB	-rw-r--r--	2024-03-10 20:38
inet_frag.h	5.25 KB	-rw-r--r--	2026-05-26 09:55
inet_hashtables.h	16.6 KB	-rw-r--r--	2026-05-26 09:55
inet_sock.h	11.36 KB	-rw-r--r--	2026-05-26 09:55
inet_timewait_sock.h	3.71 KB	-rw-r--r--	2026-05-26 09:55
inetpeer.h	3.23 KB	-rw-r--r--	2026-05-26 09:55
ioam6.h	1.19 KB	-rw-r--r--	2024-03-10 20:38
ip.h	23.18 KB	-rw-r--r--	2026-05-26 09:55
ip6_checksum.h	2.3 KB	-rw-r--r--	2024-03-10 20:38
ip6_fib.h	17.13 KB	-rw-r--r--	2026-05-26 09:55
ip6_route.h	10.18 KB	-rw-r--r--	2026-05-26 09:55
ip6_tunnel.h	5.01 KB	-rw-r--r--	2024-03-10 20:38
ip_fib.h	16.13 KB	-rw-r--r--	2026-05-26 09:55
ip_tunnels.h	16.52 KB	-rw-r--r--	2026-05-26 09:55
ip_vs.h	53.83 KB	-rw-r--r--	2024-03-10 20:38
ipcomp.h	737 B	-rw-r--r--	2024-03-10 20:38
ipconfig.h	837 B	-rw-r--r--	2024-03-10 20:38
ipv6.h	37.58 KB	-rw-r--r--	2026-05-26 09:55
ipv6_frag.h	3.38 KB	-rw-r--r--	2024-03-10 20:38
ipv6_stubs.h	3.75 KB	-rw-r--r--	2026-05-26 09:55
iw_handler.h	20.66 KB	-rw-r--r--	2024-03-10 20:38
kcm.h	4.84 KB	-rw-r--r--	2026-05-26 09:55
l3mdev.h	7.03 KB	-rw-r--r--	2026-05-26 09:55
lag.h	409 B	-rw-r--r--	2024-03-10 20:38
lapb.h	4.82 KB	-rw-r--r--	2026-05-26 09:55
lib80211.h	3.92 KB	-rw-r--r--	2024-03-10 20:38
llc.h	4.41 KB	-rw-r--r--	2024-03-10 20:38
llc_c_ac.h	9.32 KB	-rw-r--r--	2024-03-10 20:38
llc_c_ev.h	10.61 KB	-rw-r--r--	2024-03-10 20:38
llc_c_st.h	1.77 KB	-rw-r--r--	2024-03-10 20:38
llc_conn.h	4.11 KB	-rw-r--r--	2024-03-10 20:38
llc_if.h	2.17 KB	-rw-r--r--	2024-03-10 20:38
llc_pdu.h	14.46 KB	-rw-r--r--	2024-03-10 20:38
llc_s_ac.h	1.59 KB	-rw-r--r--	2024-03-10 20:38
llc_s_ev.h	2.22 KB	-rw-r--r--	2024-03-10 20:38
llc_s_st.h	1.03 KB	-rw-r--r--	2024-03-10 20:38
llc_sap.h	1.08 KB	-rw-r--r--	2024-03-10 20:38
lwtunnel.h	6.69 KB	-rw-r--r--	2026-05-26 09:55
mac80211.h	293.16 KB	-rw-r--r--	2026-05-26 09:55
mac802154.h	14.88 KB	-rw-r--r--	2024-03-10 20:38
macsec.h	10.53 KB	-rw-r--r--	2026-05-26 09:55
mctp.h	8.03 KB	-rw-r--r--	2026-05-26 09:55
mctpdevice.h	1.26 KB	-rw-r--r--	2024-03-10 20:38
mip6.h	1016 B	-rw-r--r--	2024-03-10 20:38
mld.h	2.85 KB	-rw-r--r--	2024-03-10 20:38
mpls.h	943 B	-rw-r--r--	2024-03-10 20:38
mpls_iptunnel.h	481 B	-rw-r--r--	2024-03-10 20:38
mptcp.h	7.41 KB	-rw-r--r--	2024-03-10 20:38
mrp.h	3.13 KB	-rw-r--r--	2024-03-10 20:38
ncsi.h	1.94 KB	-rw-r--r--	2024-03-10 20:38
ndisc.h	14.64 KB	-rw-r--r--	2024-03-10 20:38
neighbour.h	16.55 KB	-rw-r--r--	2026-05-26 09:55
net_debug.h	5.08 KB	-rw-r--r--	2026-05-26 09:55
net_failover.h	1023 B	-rw-r--r--	2024-03-10 20:38
net_namespace.h	14.36 KB	-rw-r--r--	2026-05-26 09:55
net_ratelimit.h	220 B	-rw-r--r--	2024-03-10 20:38
net_trackers.h	424 B	-rw-r--r--	2024-03-10 20:38
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netdev_rx_queue.h	1.32 KB	-rw-r--r--	2024-03-10 20:38
netevent.h	1.04 KB	-rw-r--r--	2024-03-10 20:38
netkit.h	1.16 KB	-rw-r--r--	2024-03-10 20:38
netlabel.h	20.15 KB	-rw-r--r--	2026-05-26 09:55
netlink.h	64.18 KB	-rw-r--r--	2024-03-10 20:38
netprio_cgroup.h	1.02 KB	-rw-r--r--	2024-03-10 20:38
netrom.h	7.73 KB	-rw-r--r--	2024-03-10 20:38
nexthop.h	11.91 KB	-rw-r--r--	2024-03-10 20:38
nl802154.h	16.04 KB	-rw-r--r--	2024-03-10 20:38
nsh.h	12.3 KB	-rw-r--r--	2024-03-10 20:38
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pie.h	3.6 KB	-rw-r--r--	2024-03-10 20:38
ping.h	2.66 KB	-rw-r--r--	2024-03-10 20:38
pkt_cls.h	25.47 KB	-rw-r--r--	2024-03-10 20:38
pkt_sched.h	7.74 KB	-rw-r--r--	2026-05-26 09:55
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protocol.h	3.81 KB	-rw-r--r--	2024-03-10 20:38
psample.h	1.06 KB	-rw-r--r--	2024-03-10 20:38
psnap.h	430 B	-rw-r--r--	2024-03-10 20:38
raw.h	2.46 KB	-rw-r--r--	2024-03-10 20:38
rawv6.h	862 B	-rw-r--r--	2024-03-10 20:38
red.h	11.33 KB	-rw-r--r--	2024-03-10 20:38
regulatory.h	9.96 KB	-rw-r--r--	2024-03-10 20:38
request_sock.h	6.5 KB	-rw-r--r--	2024-03-10 20:38
rose.h	8.06 KB	-rw-r--r--	2026-05-26 09:55
route.h	11.32 KB	-rw-r--r--	2026-05-26 09:55
rpl.h	749 B	-rw-r--r--	2024-03-10 20:38
rsi_91x.h	1.67 KB	-rw-r--r--	2024-03-10 20:38
rtnetlink.h	7.58 KB	-rw-r--r--	2026-05-26 09:55
rtnh.h	859 B	-rw-r--r--	2024-03-10 20:38
sch_generic.h	34.15 KB	-rw-r--r--	2026-05-26 09:55
scm.h	5.36 KB	-rw-r--r--	2026-05-26 09:55
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seg6_hmac.h	1.44 KB	-rw-r--r--	2024-03-10 20:38
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smc.h	2.5 KB	-rw-r--r--	2026-05-26 09:55
snmp.h	5.14 KB	-rw-r--r--	2024-03-10 20:38
sock.h	85.78 KB	-rw-r--r--	2026-05-26 09:55
sock_reuseport.h	1.83 KB	-rw-r--r--	2024-03-10 20:38
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strparser.h	4.34 KB	-rw-r--r--	2026-05-26 09:55
switchdev.h	15.1 KB	-rw-r--r--	2024-03-10 20:38
tc_wrapper.h	6.29 KB	-rw-r--r--	2026-05-26 09:55
tcp.h	85.12 KB	-rw-r--r--	2026-05-26 09:55
tcp_ao.h	12.08 KB	-rw-r--r--	2026-05-26 09:55
tcp_states.h	1.3 KB	-rw-r--r--	2024-03-10 20:38
tcx.h	4.3 KB	-rw-r--r--	2026-05-26 09:55
timewait_sock.h	925 B	-rw-r--r--	2024-03-10 20:38
tipc.h	2.35 KB	-rw-r--r--	2024-03-10 20:38
tls.h	13.28 KB	-rw-r--r--	2026-05-26 09:55
tls_prot.h	1.84 KB	-rw-r--r--	2024-03-10 20:38
tls_toe.h	2.94 KB	-rw-r--r--	2024-03-10 20:38
transp_v6.h	1.88 KB	-rw-r--r--	2024-03-10 20:38
tso.h	721 B	-rw-r--r--	2024-03-10 20:38
tun_proto.h	1015 B	-rw-r--r--	2024-03-10 20:38
udp.h	15.88 KB	-rw-r--r--	2026-05-26 09:55
udp_tunnel.h	12.47 KB	-rw-r--r--	2024-03-10 20:38
udplite.h	2.3 KB	-rw-r--r--	2024-03-10 20:38
vsock_addr.h	662 B	-rw-r--r--	2024-03-10 20:38
vxlan.h	15.83 KB	-rw-r--r--	2026-05-26 09:55
wext.h	1.47 KB	-rw-r--r--	2024-03-10 20:38
x25.h	9.46 KB	-rw-r--r--	2024-03-10 20:38
x25device.h	387 B	-rw-r--r--	2024-03-10 20:38
xdp.h	15.85 KB	-rw-r--r--	2026-05-26 09:55
xdp_priv.h	427 B	-rw-r--r--	2024-03-10 20:38
xdp_sock.h	6.3 KB	-rw-r--r--	2026-05-26 09:55
xdp_sock_drv.h	9.33 KB	-rw-r--r--	2024-03-10 20:38
xfrm.h	58.29 KB	-rw-r--r--	2026-05-26 09:55
xsk_buff_pool.h	7.13 KB	-rw-r--r--	2026-05-26 09:55

Rename

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * This file define the new driver API for Wireless Extensions
 *
 * Version :	8	16.3.07
 *
 * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
 * Copyright (c) 2001-2007 Jean Tourrilhes, All Rights Reserved.
 */

#ifndef _IW_HANDLER_H
#define _IW_HANDLER_H

/************************** DOCUMENTATION **************************/
/*
 * Initial driver API (1996 -> onward) :
 * -----------------------------------
 * The initial API just sends the IOCTL request received from user space
 * to the driver (via the driver ioctl handler). The driver has to
 * handle all the rest...
 *
 * The initial API also defines a specific handler in struct net_device
 * to handle wireless statistics.
 *
 * The initial APIs served us well and has proven a reasonably good design.
 * However, there is a few shortcommings :
 *	o No events, everything is a request to the driver.
 *	o Large ioctl function in driver with gigantic switch statement
 *	  (i.e. spaghetti code).
 *	o Driver has to mess up with copy_to/from_user, and in many cases
 *	  does it unproperly. Common mistakes are :
 *		* buffer overflows (no checks or off by one checks)
 *		* call copy_to/from_user with irq disabled
 *	o The user space interface is tied to ioctl because of the use
 *	  copy_to/from_user.
 *
 * New driver API (2002 -> onward) :
 * -------------------------------
 * The new driver API is just a bunch of standard functions (handlers),
 * each handling a specific Wireless Extension. The driver just export
 * the list of handler it supports, and those will be called apropriately.
 *
 * I tried to keep the main advantage of the previous API (simplicity,
 * efficiency and light weight), and also I provide a good dose of backward
 * compatibility (most structures are the same, driver can use both API
 * simultaneously, ...).
 * Hopefully, I've also addressed the shortcomming of the initial API.
 *
 * The advantage of the new API are :
 *	o Handling of Extensions in driver broken in small contained functions
 *	o Tighter checks of ioctl before calling the driver
 *	o Flexible commit strategy (at least, the start of it)
 *	o Backward compatibility (can be mixed with old API)
 *	o Driver doesn't have to worry about memory and user-space issues
 * The last point is important for the following reasons :
 *	o You are now able to call the new driver API from any API you
 *		want (including from within other parts of the kernel).
 *	o Common mistakes are avoided (buffer overflow, user space copy
 *		with irq disabled and so on).
 *
 * The Drawback of the new API are :
 *	o bloat (especially kernel)
 *	o need to migrate existing drivers to new API
 * My initial testing shows that the new API adds around 3kB to the kernel
 * and save between 0 and 5kB from a typical driver.
 * Also, as all structures and data types are unchanged, the migration is
 * quite straightforward (but tedious).
 *
 * ---
 *
 * The new driver API is defined below in this file. User space should
 * not be aware of what's happening down there...
 *
 * A new kernel wrapper is in charge of validating the IOCTLs and calling
 * the appropriate driver handler. This is implemented in :
 *	# net/core/wireless.c
 *
 * The driver export the list of handlers in :
 *	# include/linux/netdevice.h (one place)
 *
 * The new driver API is available for WIRELESS_EXT >= 13.
 * Good luck with migration to the new API ;-)
 */

/* ---------------------- THE IMPLEMENTATION ---------------------- */
/*
 * Some of the choice I've made are pretty controversials. Defining an
 * API is very much weighting compromises. This goes into some of the
 * details and the thinking behind the implementation.
 *
 * Implementation goals :
 * --------------------
 * The implementation goals were as follow :
 *	o Obvious : you should not need a PhD to understand what's happening,
 *		the benefit is easier maintenance.
 *	o Flexible : it should accommodate a wide variety of driver
 *		implementations and be as flexible as the old API.
 *	o Lean : it should be efficient memory wise to minimise the impact
 *		on kernel footprint.
 *	o Transparent to user space : the large number of user space
 *		applications that use Wireless Extensions should not need
 *		any modifications.
 *
 * Array of functions versus Struct of functions
 * ---------------------------------------------
 * 1) Having an array of functions allow the kernel code to access the
 * handler in a single lookup, which is much more efficient (think hash
 * table here).
 * 2) The only drawback is that driver writer may put their handler in
 * the wrong slot. This is trivial to test (I set the frequency, the
 * bitrate changes). Once the handler is in the proper slot, it will be
 * there forever, because the array is only extended at the end.
 * 3) Backward/forward compatibility : adding new handler just require
 * extending the array, so you can put newer driver in older kernel
 * without having to patch the kernel code (and vice versa).
 *
 * All handler are of the same generic type
 * ----------------------------------------
 * That's a feature !!!
 * 1) Having a generic handler allow to have generic code, which is more
 * efficient. If each of the handler was individually typed I would need
 * to add a big switch in the kernel (== more bloat). This solution is
 * more scalable, adding new Wireless Extensions doesn't add new code.
 * 2) You can use the same handler in different slots of the array. For
 * hardware, it may be more efficient or logical to handle multiple
 * Wireless Extensions with a single function, and the API allow you to
 * do that. (An example would be a single record on the card to control
 * both bitrate and frequency, the handler would read the old record,
 * modify it according to info->cmd and rewrite it).
 *
 * Functions prototype uses union iwreq_data
 * -----------------------------------------
 * Some would have preferred functions defined this way :
 *	static int mydriver_ioctl_setrate(struct net_device *dev, 
 *					  long rate, int auto)
 * 1) The kernel code doesn't "validate" the content of iwreq_data, and
 * can't do it (different hardware may have different notion of what a
 * valid frequency is), so we don't pretend that we do it.
 * 2) The above form is not extendable. If I want to add a flag (for
 * example to distinguish setting max rate and basic rate), I would
 * break the prototype. Using iwreq_data is more flexible.
 * 3) Also, the above form is not generic (see above).
 * 4) I don't expect driver developper using the wrong field of the
 * union (Doh !), so static typechecking doesn't add much value.
 * 5) Lastly, you can skip the union by doing :
 *	static int mydriver_ioctl_setrate(struct net_device *dev,
 *					  struct iw_request_info *info,
 *					  struct iw_param *rrq,
 *					  char *extra)
 * And then adding the handler in the array like this :
 *        (iw_handler) mydriver_ioctl_setrate,             // SIOCSIWRATE
 *
 * Using functions and not a registry
 * ----------------------------------
 * Another implementation option would have been for every instance to
 * define a registry (a struct containing all the Wireless Extensions)
 * and only have a function to commit the registry to the hardware.
 * 1) This approach can be emulated by the current code, but not
 * vice versa.
 * 2) Some drivers don't keep any configuration in the driver, for them
 * adding such a registry would be a significant bloat.
 * 3) The code to translate from Wireless Extension to native format is
 * needed anyway, so it would not reduce significantely the amount of code.
 * 4) The current approach only selectively translate Wireless Extensions
 * to native format and only selectively set, whereas the registry approach
 * would require to translate all WE and set all parameters for any single
 * change.
 * 5) For many Wireless Extensions, the GET operation return the current
 * dynamic value, not the value that was set.
 *
 * This header is <net/iw_handler.h>
 * ---------------------------------
 * 1) This header is kernel space only and should not be exported to
 * user space. Headers in "include/linux/" are exported, headers in
 * "include/net/" are not.
 *
 * Mixed 32/64 bit issues
 * ----------------------
 * The Wireless Extensions are designed to be 64 bit clean, by using only
 * datatypes with explicit storage size.
 * There are some issues related to kernel and user space using different
 * memory model, and in particular 64bit kernel with 32bit user space.
 * The problem is related to struct iw_point, that contains a pointer
 * that *may* need to be translated.
 * This is quite messy. The new API doesn't solve this problem (it can't),
 * but is a step in the right direction :
 * 1) Meta data about each ioctl is easily available, so we know what type
 * of translation is needed.
 * 2) The move of data between kernel and user space is only done in a single
 * place in the kernel, so adding specific hooks in there is possible.
 * 3) In the long term, it allows to move away from using ioctl as the
 * user space API.
 *
 * So many comments and so few code
 * --------------------------------
 * That's a feature. Comments won't bloat the resulting kernel binary.
 */

/***************************** INCLUDES *****************************/

#include <linux/wireless.h>		/* IOCTL user space API */
#include <linux/if_ether.h>

/***************************** VERSION *****************************/
/*
 * This constant is used to know which version of the driver API is
 * available. Hopefully, this will be pretty stable and no changes
 * will be needed...
 * I just plan to increment with each new version.
 */
#define IW_HANDLER_VERSION	8

/*
 * Changes :
 *
 * V2 to V3
 * --------
 *	- Move event definition in <linux/wireless.h>
 *	- Add Wireless Event support :
 *		o wireless_send_event() prototype
 *		o iwe_stream_add_event/point() inline functions
 * V3 to V4
 * --------
 *	- Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes
 *
 * V4 to V5
 * --------
 *	- Add new spy support : struct iw_spy_data & prototypes
 *
 * V5 to V6
 * --------
 *	- Change the way we get to spy_data method for added safety
 *	- Remove spy #ifdef, they are always on -> cleaner code
 *	- Add IW_DESCR_FLAG_NOMAX flag for very large requests
 *	- Start migrating get_wireless_stats to struct iw_handler_def
 *
 * V6 to V7
 * --------
 *	- Add struct ieee80211_device pointer in struct iw_public_data
 *	- Remove (struct iw_point *)->pointer from events and streams
 *	- Remove spy_offset from struct iw_handler_def
 *	- Add "check" version of event macros for ieee802.11 stack
 *
 * V7 to V8
 * ----------
 *	- Prevent leaking of kernel space in stream on 64 bits.
 */

/**************************** CONSTANTS ****************************/

/* Enhanced spy support available */
#define IW_WIRELESS_SPY
#define IW_WIRELESS_THRSPY

/* Special error message for the driver to indicate that we
 * should do a commit after return from the iw_handler */
#define EIWCOMMIT	EINPROGRESS

/* Flags available in struct iw_request_info */
#define IW_REQUEST_FLAG_COMPAT	0x0001	/* Compat ioctl call */

/* Type of headers we know about (basically union iwreq_data) */
#define IW_HEADER_TYPE_NULL	0	/* Not available */
#define IW_HEADER_TYPE_CHAR	2	/* char [IFNAMSIZ] */
#define IW_HEADER_TYPE_UINT	4	/* __u32 */
#define IW_HEADER_TYPE_FREQ	5	/* struct iw_freq */
#define IW_HEADER_TYPE_ADDR	6	/* struct sockaddr */
#define IW_HEADER_TYPE_POINT	8	/* struct iw_point */
#define IW_HEADER_TYPE_PARAM	9	/* struct iw_param */
#define IW_HEADER_TYPE_QUAL	10	/* struct iw_quality */

/* Handling flags */
/* Most are not implemented. I just use them as a reminder of some
 * cool features we might need one day ;-) */
#define IW_DESCR_FLAG_NONE	0x0000	/* Obvious */
/* Wrapper level flags */
#define IW_DESCR_FLAG_DUMP	0x0001	/* Not part of the dump command */
#define IW_DESCR_FLAG_EVENT	0x0002	/* Generate an event on SET */
#define IW_DESCR_FLAG_RESTRICT	0x0004	/* GET : request is ROOT only */
				/* SET : Omit payload from generated iwevent */
#define IW_DESCR_FLAG_NOMAX	0x0008	/* GET : no limit on request size */
/* Driver level flags */
#define IW_DESCR_FLAG_WAIT	0x0100	/* Wait for driver event */

/****************************** TYPES ******************************/

/* ----------------------- WIRELESS HANDLER ----------------------- */
/*
 * A wireless handler is just a standard function, that looks like the
 * ioctl handler.
 * We also define there how a handler list look like... As the Wireless
 * Extension space is quite dense, we use a simple array, which is faster
 * (that's the perfect hash table ;-).
 */

/*
 * Meta data about the request passed to the iw_handler.
 * Most handlers can safely ignore what's in there.
 * The 'cmd' field might come handy if you want to use the same handler
 * for multiple command...
 * This struct is also my long term insurance. I can add new fields here
 * without breaking the prototype of iw_handler...
 */
struct iw_request_info {
	__u16		cmd;		/* Wireless Extension command */
	__u16		flags;		/* More to come ;-) */
};

struct net_device;

/*
 * This is how a function handling a Wireless Extension should look
 * like (both get and set, standard and private).
 */
typedef int (*iw_handler)(struct net_device *dev, struct iw_request_info *info,
			  union iwreq_data *wrqu, char *extra);

/*
 * This define all the handler that the driver export.
 * As you need only one per driver type, please use a static const
 * shared by all driver instances... Same for the members...
 * This will be linked from net_device in <linux/netdevice.h>
 */
struct iw_handler_def {

/* Array of handlers for standard ioctls
	 * We will call dev->wireless_handlers->standard[ioctl - SIOCIWFIRST]
	 */
	const iw_handler *	standard;
	/* Number of handlers defined (more precisely, index of the
	 * last defined handler + 1) */
	__u16			num_standard;

#ifdef CONFIG_WEXT_PRIV
	__u16			num_private;
	/* Number of private arg description */
	__u16			num_private_args;
	/* Array of handlers for private ioctls
	 * Will call dev->wireless_handlers->private[ioctl - SIOCIWFIRSTPRIV]
	 */
	const iw_handler *	private;

/* Arguments of private handler. This one is just a list, so you
	 * can put it in any order you want and should not leave holes...
	 * We will automatically export that to user space... */
	const struct iw_priv_args *	private_args;
#endif

/* New location of get_wireless_stats, to de-bloat struct net_device.
	 * The old pointer in struct net_device will be gradually phased
	 * out, and drivers are encouraged to use this one... */
	struct iw_statistics*	(*get_wireless_stats)(struct net_device *dev);
};

/* ---------------------- IOCTL DESCRIPTION ---------------------- */
/*
 * One of the main goal of the new interface is to deal entirely with
 * user space/kernel space memory move.
 * For that, we need to know :
 *	o if iwreq is a pointer or contain the full data
 *	o what is the size of the data to copy
 *
 * For private IOCTLs, we use the same rules as used by iwpriv and
 * defined in struct iw_priv_args.
 *
 * For standard IOCTLs, things are quite different and we need to
 * use the structures below. Actually, this struct is also more
 * efficient, but that's another story...
 */

/*
 * Describe how a standard IOCTL looks like.
 */
struct iw_ioctl_description {
	__u8	header_type;		/* NULL, iw_point or other */
	__u8	token_type;		/* Future */
	__u16	token_size;		/* Granularity of payload */
	__u16	min_tokens;		/* Min acceptable token number */
	__u16	max_tokens;		/* Max acceptable token number */
	__u32	flags;			/* Special handling of the request */
};

/* Need to think of short header translation table. Later. */

/* --------------------- ENHANCED SPY SUPPORT --------------------- */
/*
 * In the old days, the driver was handling spy support all by itself.
 * Now, the driver can delegate this task to Wireless Extensions.
 * It needs to include this struct in its private part and use the
 * standard spy iw_handler.
 */

/*
 * Instance specific spy data, i.e. addresses spied and quality for them.
 */
struct iw_spy_data {
	/* --- Standard spy support --- */
	int			spy_number;
	u_char			spy_address[IW_MAX_SPY][ETH_ALEN];
	struct iw_quality	spy_stat[IW_MAX_SPY];
	/* --- Enhanced spy support (event) */
	struct iw_quality	spy_thr_low;	/* Low threshold */
	struct iw_quality	spy_thr_high;	/* High threshold */
	u_char			spy_thr_under[IW_MAX_SPY];
};

/* --------------------- DEVICE WIRELESS DATA --------------------- */
/*
 * This is all the wireless data specific to a device instance that
 * is managed by the core of Wireless Extensions or the 802.11 layer.
 * We only keep pointer to those structures, so that a driver is free
 * to share them between instances.
 * This structure should be initialised before registering the device.
 * Access to this data follow the same rules as any other struct net_device
 * data (i.e. valid as long as struct net_device exist, same locking rules).
 */
/* Forward declaration */
struct libipw_device;
/* The struct */
struct iw_public_data {
	/* Driver enhanced spy support */
	struct iw_spy_data *		spy_data;
	/* Legacy structure managed by the ipw2x00-specific IEEE 802.11 layer */
	struct libipw_device *		libipw;
};

/**************************** PROTOTYPES ****************************/
/*
 * Functions part of the Wireless Extensions (defined in net/wireless/wext-core.c).
 * Those may be called by driver modules.
 */

/* Send a single event to user space */
void wireless_send_event(struct net_device *dev, unsigned int cmd,
			 union iwreq_data *wrqu, const char *extra);
#ifdef CONFIG_WEXT_CORE
/* flush all previous wext events - if work is done from netdev notifiers */
void wireless_nlevent_flush(void);
#else
static inline void wireless_nlevent_flush(void) {}
#endif

/* We may need a function to send a stream of events to user space.
 * More on that later... */

/* Standard handler for SIOCSIWSPY */
int iw_handler_set_spy(struct net_device *dev, struct iw_request_info *info,
		       union iwreq_data *wrqu, char *extra);
/* Standard handler for SIOCGIWSPY */
int iw_handler_get_spy(struct net_device *dev, struct iw_request_info *info,
		       union iwreq_data *wrqu, char *extra);
/* Standard handler for SIOCSIWTHRSPY */
int iw_handler_set_thrspy(struct net_device *dev, struct iw_request_info *info,
			  union iwreq_data *wrqu, char *extra);
/* Standard handler for SIOCGIWTHRSPY */
int iw_handler_get_thrspy(struct net_device *dev, struct iw_request_info *info,
			  union iwreq_data *wrqu, char *extra);
/* Driver call to update spy records */
void wireless_spy_update(struct net_device *dev, unsigned char *address,
			 struct iw_quality *wstats);

/************************* INLINE FUNTIONS *************************/
/*
 * Function that are so simple that it's more efficient inlining them
 */

static inline int iwe_stream_lcp_len(struct iw_request_info *info)
{
#ifdef CONFIG_COMPAT
	if (info->flags & IW_REQUEST_FLAG_COMPAT)
		return IW_EV_COMPAT_LCP_LEN;
#endif
	return IW_EV_LCP_LEN;
}

static inline int iwe_stream_point_len(struct iw_request_info *info)
{
#ifdef CONFIG_COMPAT
	if (info->flags & IW_REQUEST_FLAG_COMPAT)
		return IW_EV_COMPAT_POINT_LEN;
#endif
	return IW_EV_POINT_LEN;
}

static inline int iwe_stream_event_len_adjust(struct iw_request_info *info,
					      int event_len)
{
#ifdef CONFIG_COMPAT
	if (info->flags & IW_REQUEST_FLAG_COMPAT) {
		event_len -= IW_EV_LCP_LEN;
		event_len += IW_EV_COMPAT_LCP_LEN;
	}
#endif

return event_len;
}

/*------------------------------------------------------------------*/
/*
 * Wrapper to add an Wireless Event to a stream of events.
 */
char *iwe_stream_add_event(struct iw_request_info *info, char *stream,
			   char *ends, struct iw_event *iwe, int event_len);

static inline char *
iwe_stream_add_event_check(struct iw_request_info *info, char *stream,
			   char *ends, struct iw_event *iwe, int event_len)
{
	char *res = iwe_stream_add_event(info, stream, ends, iwe, event_len);

if (res == stream)
		return ERR_PTR(-E2BIG);
	return res;
}

/*------------------------------------------------------------------*/
/*
 * Wrapper to add an short Wireless Event containing a pointer to a
 * stream of events.
 */
char *iwe_stream_add_point(struct iw_request_info *info, char *stream,
			   char *ends, struct iw_event *iwe, char *extra);

static inline char *
iwe_stream_add_point_check(struct iw_request_info *info, char *stream,
			   char *ends, struct iw_event *iwe, char *extra)
{
	char *res = iwe_stream_add_point(info, stream, ends, iwe, extra);

if (res == stream)
		return ERR_PTR(-E2BIG);
	return res;
}

/*------------------------------------------------------------------*/
/*
 * Wrapper to add a value to a Wireless Event in a stream of events.
 * Be careful, this one is tricky to use properly :
 * At the first run, you need to have (value = event + IW_EV_LCP_LEN).
 */
char *iwe_stream_add_value(struct iw_request_info *info, char *event,
			   char *value, char *ends, struct iw_event *iwe,
			   int event_len);

#endif	/* _IW_HANDLER_H */