1. 调用关系和说明

sock_ioctl:./net/socket.c, 以file_operations注册在socket的文件结构中，接收应用层通过ioctl下放的命令

|---dev_ioctl: ./net/core/dev.c，接收上层用户空间下发给内核网络模块的命令。

|---wext_handle_ioctl: 处理的命令范围为：(cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST, SIOCIWFIRST=0x8B00 SIOCIWLAST = 0x8BFF) 最多255个命令。主要有四种处理方法：定义在：linux\kernels\mips-linux-2.6.31\include\linux\wireless.h.

|---wext_ioctl_dispatch : 根据cmd分发，主要有两个回调函数ioctl_standard_call,ioctl_private_call

|---wireless_process_ioctl，

|---get_handler，通过命令字查找记录在设备wireless_handlers字段中的注册handle

|---ioctl_standard_call，处理标准的无线ioctl命令（0x8B00-0x8BDF）

|---&(standard_ioctl[cmd - SIOCIWFIRST])，获取无线扩展的ioctl描述符（如果添加新的“标准”ioctl命令，需要同步增加该描述符映射，否则无法下传）

|---[handle](), 回调无线驱动为该命令绑定的处理函数

|---ioctl_private_call，处理无线设备私有的ioctl（0x8BE0-0x8BFF）

|---get_priv_descr_and_size，检查是否有额外参数

|---ioctl_private_iw_point, 如果有额外参数，从用户空间复制数据到内核，调用handle回调

|---[handle](), 回到无线驱动为该命令绑定的处理函数

|---dev->netdev_ops->ndo_do_ioctl，如果没有获取的到注册的handle，则回调设备注册的ndo_do_ioctl（老驱动类型）

1.1 sock_ioctl

该函数是socket内核IOCTL响应的入口函数，主要完成依据下发的ioctl命令类型进行分类处理：

（1）如果下放的ioctl命令类型是设备私有类型，则交由设备驱动的ioctl处理（dev_ioctl）；

（2）如果系统支持无线设备扩展，并且下发的ioctl命令类型属于无线设备类型（0x8b00-0x8bff）则交由设备驱动的ioctl处理（dev_ioctl）；

（3）匹配标准的socket ioctl类型，如果匹配进行对应处理；

（4）如果不匹配标准socket ioctl类型，尝试匹配socket注册的协议的ioctl类型并处理；

（5）如果以上都不匹配，则尝试下发到设备驱动处理（dev_ioctl）。

1.2 dev_ioctl

该函数是设备层的ioctl响应入口函数，功能：

（1）匹配下发的ioctl命令，进行通用命令匹配和处理；

（2）如果是私有命令，则回调设备注册的私有ioctl响应函数（设备注册的ndo_do_ioctl）；

（3）如果是无线扩展的ioctl命令，交由wext_handle_ioctl处理。

1.3 wext_handle_ioctl

wext_handle_ioctl主要是处理无线扩展设备的ioctl的，无线设备的ioctl命令字范围是0x8B00 – 0x8BFF，共计255个操作类型；其中，0x8BE0到0x8BFF共32个操作类型为无线设备私有ioctl，由不同无线厂商自行定义。

wext_handle_ioctl处理下发的无线ioctl命令：

（1）通过匹配设备的数据结构体中wireless_handlers字段（注册的ioctl handles），如果有匹配的handle，则交由对应的handle处理；

（2）如果没有匹配的handle，则统一下发到无线设备的ndo_do_ioctl（初始化时注册处理函数）尝试处理。

2. ioctl命令字

网络设备通用ioctl命令字：

分类	命令字	命名数值	描述	备注
特别类型	SIOCINQ	FIONREAD/0x514B
特别类型	SIOCOUTQ	TIOCOUTQ/0x5411
路由表管理	SIOCADDRT	0x890B	add routing table entry
	SIOCDELRT	0x890C	delete routing table entry
	SIOCRTMSG	0x890D	call to routing system
socket配置管理	SIOCGIFNAME	0x8910	get iface name
	SIOCSIFLINK	0x8911	set iface channel
	SIOCGIFCONF	0x8912	get iface list
	SIOCGIFFLAGS	0x8913	get flags
	SIOCSIFFLAGS	0x8914	set flags
	SIOCGIFADDR	0x8915	get PA address
	SIOCSIFADDR	0x8916	set PA address
	SIOCGIFDSTADDR	0x8917	get remote PA address
	SIOCSIFDSTADDR	0x8918	set remote PA address
	SIOCGIFBRDADDR	0x8919	get broadcast PA address
	SIOCSIFBRDADDR	0x891a	set broadcast PA address
	SIOCGIFNETMASK	0x891b	get network PA mask
	SIOCSIFNETMASK	0x891c	set network PA mask
	SIOCGIFMETRIC	0x891d	get metric
	SIOCSIFMETRIC	0x891e	set metric
	SIOCGIFMEM	0x891f	get memory address (BSD)
	SIOCSIFMEM	0x8920	set memory address (BSD)
	SIOCGIFMTU	0x8921	get MTU size
	SIOCSIFMTU	0x8922	set MTU size
	SIOCSIFNAME	0x8923	set interface name
	SIOCSIFHWADDR	0x8924	set hardware address
	SIOCGIFENCAP	0x8925	getencapsulations
	SIOCSIFENCAP	0x8926
	SIOCGIFHWADDR	0x8927	Get hardware address
	SIOCGIFSLAVE	0x8929	Driver slaving support
	SIOCSIFSLAVE	0x8930
	SIOCADDMULTI	0x8931	Multicast address lists
	SIOCDELMULTI	0x8932
	SIOCGIFINDEX	0x8933	name -> if_index mapping
	SIOGIFINDEX	SIOCGIFINDEX/0x8933	misprint compatibility
	SIOCSIFPFLAGS	0x8934	setextended flags set
	SIOCGIFPFLAGS	0x8935
	SIOCDIFADDR	0x8936	delete PA address
	SIOCSIFHWBROADCAST	0x8937	set hardware broadcast addr
	SIOCGIFCOUNT	0x8938	get number of devices
	SIOCGIFBR	0x8940	Bridging support
	SIOCSIFBR	0x8941	Set bridging options
	SIOCGIFTXQLEN	0x8942	Get the tx queue length
	SIOCSIFTXQLEN	0x8943	Set the tx queue length
	SIOCETHTOOL	0x8946	Ethtool interface
	SIOCGMIIPHY	0x8947	Get address of MII PHY in use.
	SIOCGMIIREG	0x8948	Read MII PHY register.
	SIOCSMIIREG	0x8949	Write MII PHY register.
	SIOCWANDEV	0x894A	getnetdev parameters
ARP 缓存管理	SIOCDARP	0x8953	delete ARP table entry
	SIOCGARP	0x8954	get ARP table entry
	SIOCSARP	0x8955	set ARP table entry
RARP缓存管理	SIOCDRARP	0x8960	delete RARP table entry
	SIOCGRARP	0x8961	get RARP table entry
	SIOCSRARP	0x8962	set RARP table entry
驱动配置参数	SIOCGIFMAP	0x8970	Get device parameters
驱动配置参数	SIOCSIFMAP	0x8971	Set device parameters
DLCI配置管理	SIOCADDDLCI	0x8980	Create new DLCI device
	SIOCDELDLCI	0x8981	Delete DLCI device
	SIOCGIFVLAN	0x8982	802.1Q VLAN support
	SIOCSIFVLAN	0x8983	Set 802.1Q VLAN options
网桥管理	SIOCBRADDBR	0x89a0	create new bridge device
	SIOCBRDELBR	0x89a1	remove bridge device
	SIOCBRADDIF	0x89a2	add interface to bridge
	SIOCBRDELIF	0x89a3	remove interface from bridge
时间戳	SIOCSHWTSTAMP	0x89b0	hardware time stamping
设备私有类型	SIOCDEVPRIVATE	0x89F0		0x89F0 - 0x89FF
协议私有类型	SIOCPROTOPRIVATE	0x89E0		0x89E0 - 0x89EF
无线扩展				见附表 iw-ioctls

无线设备扩展ioctl命令字：

分类	命令字	命名数值	描述
标准类型	SIOCSIWCOMMIT	0x8B00	Commit pending changes to driver
	SIOCGIWNAME	0x8B01	get name == wireless protocol
	SIOCSIWNWID	0x8B02	set network id (pre-802.11)
	SIOCGIWNWID	0x8B03	get network id (the cell)
	SIOCSIWFREQ	0x8B04	set channel(Hz)
	SIOCGIWFREQ	0x8B05	get channel(Hz)
	SIOCSIWMODE	0x8B06	set operation mode
	SIOCGIWMODE	0x8B07	get operation mode
	SIOCSIWSENS	0x8B08	set sensitivity (dBm)
	SIOCGIWSENS	0x8B09	get sensitivity (dBm)
	SIOCSIWRANGE	0x8B0A	Unused
	SIOCGIWRANGE	0x8B0B	Get range of parameters
	SIOCSIWPRIV	0x8B0C	Unused
	SIOCGIWPRIV	0x8B0D	get private ioctl interface info
	SIOCSIWSTATS	0x8B0E	Unused
	SIOCGIWSTATS	0x8B0F	Get stats
	SIOCSIWSPY	0x8B10	set spy addresses
	SIOCGIWSPY	0x8B11	get spy info (quality of link)
	SIOCSIWTHRSPY	0x8B12	set spy threshold (spy event)
	SIOCGIWTHRSPY	0x8B13	get spy threshold
	SIOCSIWAP	0x8B14	set access point MAC addresses
	SIOCGIWAP	0x8B15	get access point MAC addresses
	SIOCGIWAPLIST	0x8B17	Deprecated in favor of scanning
	SIOCSIWSCAN	0x8B18	trigger scanning (list cells)
	SIOCGIWSCAN	0x8B19	get scanning results
	SIOCSIWESSID	0x8B1A	set ESSID (network name)
	SIOCGIWESSID	0x8B1B	get ESSID
	SIOCSIWNICKN	0x8B1C	set node name
	SIOCGIWNICKN	0x8B1D	get node name
	SIOCSIWRATE	0x8B20	set default bit rate (bps)
	SIOCGIWRATE	0x8B21	get default bit rate (bps)
	SIOCSIWRTS	0x8B22	set RTSthreshold (bytes)
	SIOCGIWRTS	0x8B23	get RTSthreshold (bytes)
	SIOCSIWFRAG	0x8B24	set fragmentation thr (bytes)
	SIOCGIWFRAG	0x8B25	get fragmentation thr (bytes)
	SIOCSIWTXPOW	0x8B26	set transmit power (dBm)
	SIOCGIWTXPOW	0x8B27	get transmit power (dBm)
	SIOCSIWRETRY	0x8B28	set retry limits and lifetime
	SIOCGIWRETRY	0x8B29	get retry limits and lifetime
	SIOCSIWENCODE	0x8B2A	set encoding token & mode
	SIOCGIWENCODE	0x8B2B	get encoding token & mode
	SIOCSIWPOWER	0x8B2C	set Power Management settings
	SIOCGIWPOWER	0x8B2D	get Power Management settings
	SIOCSIWGENIE	0x8B30	set generic IE
	SIOCGIWGENIE	0x8B31	get generic IE
	SIOCSIWMLME	0x8B16	request MLME operation, uses struct iw_mlme
	SIOCSIWAUTH	0x8B32	set authentication mode params
	SIOCGIWAUTH	0x8B33	get authentication mode params
	SIOCSIWENCODEEXT	0x8B34	set encoding token & mode
	SIOCGIWENCODEEXT	0x8B35	get encoding token & mode
	SIOCSIWPMKSA	0x8B36	PMKSA cache operation
私有类型范围	SIOCIWFIRSTPRIV	0x8BE0
私有类型范围	SIOCIWLASTPRIV	0x8BFF

atheros实现的部分私有ioctl命令：

SIOCG80211STATS	(SIOCDEVPRIVATE+2)
IEEE80211_IOCTL_GETKEY	(SIOCDEVPRIVATE+3)
IEEE80211_IOCTL_GETWPAIE	(SIOCDEVPRIVATE+4)
IEEE80211_IOCTL_STA_STATS	(SIOCDEVPRIVATE+5)
IEEE80211_IOCTL_STA_INFO	(SIOCDEVPRIVATE+6)
SIOC80211IFCREATE	(SIOCDEVPRIVATE+7)
SIOC80211IFDESTROY	(SIOCDEVPRIVATE+8)
IEEE80211_IOCTL_SCAN_RESULTS	(SIOCDEVPRIVATE+9)
IEEE80211_IOCTL_RES_REQ	(SIOCDEVPRIVATE+10)
IEEE80211_IOCTL_GETMAC	(SIOCDEVPRIVATE+11)
IEEE80211_IOCTL_CONFIG_GENERIC	(SIOCDEVPRIVATE+12)
SIOCIOCTLTX99	(SIOCDEVPRIVATE+13)
IEEE80211_IOCTL_P2P_BIG_PARAM	(SIOCDEVPRIVATE+14)
SIOCDEVVENDOR	(SIOCDEVPRIVATE+15)
IEEE80211_IOCTL_GET_SCAN_SPACE	(SIOCDEVPRIVATE+16)

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