[NL80211]: add netlink interface to cfg80211
Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>hifive-unleashed-5.1
Johannes Berg
David S. Miller
parent
0800f17026
commit
5568296573
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@ -6,8 +6,98 @@
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* Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
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*/
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/**
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* enum nl80211_commands - supported nl80211 commands
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*
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* @NL80211_CMD_UNSPEC: unspecified command to catch errors
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*
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* @NL80211_CMD_GET_WIPHY: request information about a wiphy or dump request
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* to get a list of all present wiphys.
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* @NL80211_CMD_SET_WIPHY: set wiphy name, needs %NL80211_ATTR_WIPHY and
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* %NL80211_ATTR_WIPHY_NAME.
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* @NL80211_CMD_NEW_WIPHY: Newly created wiphy, response to get request
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* or rename notification. Has attributes %NL80211_ATTR_WIPHY and
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* %NL80211_ATTR_WIPHY_NAME.
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* @NL80211_CMD_DEL_WIPHY: Wiphy deleted. Has attributes
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* %NL80211_ATTR_WIPHY and %NL80211_ATTR_WIPHY_NAME.
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*
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* @NL80211_CMD_GET_INTERFACE: Request an interface's configuration;
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* either a dump request on a %NL80211_ATTR_WIPHY or a specific get
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* on an %NL80211_ATTR_IFINDEX is supported.
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* @NL80211_CMD_SET_INTERFACE: Set type of a virtual interface, requires
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* %NL80211_ATTR_IFINDEX and %NL80211_ATTR_IFTYPE.
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* @NL80211_CMD_NEW_INTERFACE: Newly created virtual interface or response
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* to %NL80211_CMD_GET_INTERFACE. Has %NL80211_ATTR_IFINDEX,
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* %NL80211_ATTR_WIPHY and %NL80211_ATTR_IFTYPE attributes. Can also
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* be sent from userspace to request creation of a new virtual interface,
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* then requires attributes %NL80211_ATTR_WIPHY, %NL80211_ATTR_IFTYPE and
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* %NL80211_ATTR_IFNAME.
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* @NL80211_CMD_DEL_INTERFACE: Virtual interface was deleted, has attributes
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* %NL80211_ATTR_IFINDEX and %NL80211_ATTR_WIPHY. Can also be sent from
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* userspace to request deletion of a virtual interface, then requires
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* attribute %NL80211_ATTR_IFINDEX.
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*
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* @NL80211_CMD_MAX: highest used command number
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* @__NL80211_CMD_AFTER_LAST: internal use
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*/
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enum nl80211_commands {
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/* don't change the order or add anything inbetween, this is ABI! */
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NL80211_CMD_UNSPEC,
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NL80211_CMD_GET_WIPHY, /* can dump */
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NL80211_CMD_SET_WIPHY,
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NL80211_CMD_NEW_WIPHY,
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NL80211_CMD_DEL_WIPHY,
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NL80211_CMD_GET_INTERFACE, /* can dump */
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NL80211_CMD_SET_INTERFACE,
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NL80211_CMD_NEW_INTERFACE,
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NL80211_CMD_DEL_INTERFACE,
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/* add commands here */
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/* used to define NL80211_CMD_MAX below */
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__NL80211_CMD_AFTER_LAST,
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NL80211_CMD_MAX = __NL80211_CMD_AFTER_LAST - 1
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};
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/**
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* enum nl80211_attrs - nl80211 netlink attributes
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*
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* @NL80211_ATTR_UNSPEC: unspecified attribute to catch errors
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*
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* @NL80211_ATTR_WIPHY: index of wiphy to operate on, cf.
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* /sys/class/ieee80211/<phyname>/index
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* @NL80211_ATTR_WIPHY_NAME: wiphy name (used for renaming)
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*
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* @NL80211_ATTR_IFINDEX: network interface index of the device to operate on
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* @NL80211_ATTR_IFNAME: network interface name
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* @NL80211_ATTR_IFTYPE: type of virtual interface, see &enum nl80211_iftype
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*
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* @NL80211_ATTR_MAX: highest attribute number currently defined
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* @__NL80211_ATTR_AFTER_LAST: internal use
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*/
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enum nl80211_attrs {
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/* don't change the order or add anything inbetween, this is ABI! */
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NL80211_ATTR_UNSPEC,
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NL80211_ATTR_WIPHY,
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NL80211_ATTR_WIPHY_NAME,
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NL80211_ATTR_IFINDEX,
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NL80211_ATTR_IFNAME,
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NL80211_ATTR_IFTYPE,
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/* add attributes here, update the policy in nl80211.c */
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__NL80211_ATTR_AFTER_LAST,
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NL80211_ATTR_MAX = __NL80211_ATTR_AFTER_LAST - 1
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};
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/**
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* enum nl80211_iftype - (virtual) interface types
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*
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* @NL80211_IFTYPE_UNSPECIFIED: unspecified type, driver decides
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* @NL80211_IFTYPE_ADHOC: independent BSS member
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* @NL80211_IFTYPE_STATION: managed BSS member
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@ -15,9 +105,10 @@
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* @NL80211_IFTYPE_AP_VLAN: VLAN interface for access points
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* @NL80211_IFTYPE_WDS: wireless distribution interface
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* @NL80211_IFTYPE_MONITOR: monitor interface receiving all frames
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* @NL80211_IFTYPE_MAX: highest interface type number currently defined
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* @__NL80211_IFTYPE_AFTER_LAST: internal use
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*
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* These values are used with the NL80211_ATTR_IFTYPE
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* These values are used with the %NL80211_ATTR_IFTYPE
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* to set the type of an interface.
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*
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*/
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@ -31,8 +122,8 @@ enum nl80211_iftype {
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NL80211_IFTYPE_MONITOR,
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/* keep last */
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__NL80211_IFTYPE_AFTER_LAST
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__NL80211_IFTYPE_AFTER_LAST,
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NL80211_IFTYPE_MAX = __NL80211_IFTYPE_AFTER_LAST - 1
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};
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#define NL80211_IFTYPE_MAX (__NL80211_IFTYPE_AFTER_LAST - 1)
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#endif /* __LINUX_NL80211_H */
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@ -3,15 +3,15 @@
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#include <linux/netlink.h>
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#include <linux/skbuff.h>
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#include <linux/nl80211.h>
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#include <net/genetlink.h>
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/*
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* 802.11 configuration in-kernel interface
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*
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
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*/
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/* Radiotap header iteration
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* implemented in net/wireless/radiotap.c
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* docs in Documentation/networking/radiotap-headers.txt
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@ -68,11 +68,16 @@ struct wiphy;
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* @add_virtual_intf: create a new virtual interface with the given name
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*
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* @del_virtual_intf: remove the virtual interface determined by ifindex.
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*
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* @change_virtual_intf: change type of virtual interface
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*
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*/
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struct cfg80211_ops {
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int (*add_virtual_intf)(struct wiphy *wiphy, char *name,
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unsigned int type);
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enum nl80211_iftype type);
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int (*del_virtual_intf)(struct wiphy *wiphy, int ifindex);
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int (*change_virtual_intf)(struct wiphy *wiphy, int ifindex,
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enum nl80211_iftype type);
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};
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#endif /* __NET_CFG80211_H */
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@ -431,7 +431,13 @@ struct iw_public_data {
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* Those may be called only within the kernel.
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*/
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/* functions that may be called by driver modules */
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/* First : function strictly used inside the kernel */
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/* Handle /proc/net/wireless, called in net/code/dev.c */
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extern int dev_get_wireless_info(char * buffer, char **start, off_t offset,
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int length);
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/* Second : functions that may be called by driver modules */
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/* Send a single event to user space */
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extern void wireless_send_event(struct net_device * dev,
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@ -14,7 +14,7 @@
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#include "ieee80211_cfg.h"
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static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
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unsigned int type)
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enum nl80211_iftype type)
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{
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struct ieee80211_local *local = wiphy_priv(wiphy);
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int itype;
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@ -1,6 +1,19 @@
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config CFG80211
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tristate "Improved wireless configuration API"
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config NL80211
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bool "nl80211 new netlink interface support"
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depends CFG80211
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default y
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---help---
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This option turns on the new netlink interface
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(nl80211) support in cfg80211.
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If =n, drivers using mac80211 will be configured via
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wireless extension support provided by that subsystem.
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If unsure, say Y.
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config WIRELESS_EXT
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bool "Wireless extensions"
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default n
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@ -10,7 +23,9 @@ config WIRELESS_EXT
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Wireless extensions will be replaced by cfg80211 and
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will be required only by legacy drivers that implement
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wireless extension handlers.
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wireless extension handlers. This option does not
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affect the wireless-extension backward compatibility
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code in cfg80211.
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Say N (if you can) unless you know you need wireless
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extensions for external modules.
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@ -2,3 +2,4 @@ obj-$(CONFIG_WIRELESS_EXT) += wext.o
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obj-$(CONFIG_CFG80211) += cfg80211.o
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cfg80211-y += core.o sysfs.o radiotap.o
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cfg80211-$(CONFIG_NL80211) += nl80211.o
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@ -16,6 +16,7 @@
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#include <net/genetlink.h>
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#include <net/cfg80211.h>
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#include <net/wireless.h>
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#include "nl80211.h"
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#include "core.h"
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#include "sysfs.h"
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@ -36,6 +37,146 @@ static int wiphy_counter;
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/* for debugfs */
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static struct dentry *ieee80211_debugfs_dir;
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/* requires cfg80211_drv_mutex to be held! */
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static struct cfg80211_registered_device *cfg80211_drv_by_wiphy(int wiphy)
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{
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struct cfg80211_registered_device *result = NULL, *drv;
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list_for_each_entry(drv, &cfg80211_drv_list, list) {
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if (drv->idx == wiphy) {
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result = drv;
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break;
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}
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}
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return result;
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}
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/* requires cfg80211_drv_mutex to be held! */
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static struct cfg80211_registered_device *
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__cfg80211_drv_from_info(struct genl_info *info)
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{
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int ifindex;
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struct cfg80211_registered_device *bywiphy = NULL, *byifidx = NULL;
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struct net_device *dev;
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int err = -EINVAL;
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if (info->attrs[NL80211_ATTR_WIPHY]) {
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bywiphy = cfg80211_drv_by_wiphy(
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nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
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err = -ENODEV;
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}
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if (info->attrs[NL80211_ATTR_IFINDEX]) {
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ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
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dev = dev_get_by_index(&init_net, ifindex);
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if (dev) {
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if (dev->ieee80211_ptr)
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byifidx =
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wiphy_to_dev(dev->ieee80211_ptr->wiphy);
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dev_put(dev);
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}
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err = -ENODEV;
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}
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if (bywiphy && byifidx) {
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if (bywiphy != byifidx)
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return ERR_PTR(-EINVAL);
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else
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return bywiphy; /* == byifidx */
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}
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if (bywiphy)
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return bywiphy;
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if (byifidx)
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return byifidx;
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return ERR_PTR(err);
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}
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struct cfg80211_registered_device *
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cfg80211_get_dev_from_info(struct genl_info *info)
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{
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struct cfg80211_registered_device *drv;
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mutex_lock(&cfg80211_drv_mutex);
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drv = __cfg80211_drv_from_info(info);
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/* if it is not an error we grab the lock on
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* it to assure it won't be going away while
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* we operate on it */
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if (!IS_ERR(drv))
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mutex_lock(&drv->mtx);
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mutex_unlock(&cfg80211_drv_mutex);
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return drv;
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}
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struct cfg80211_registered_device *
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cfg80211_get_dev_from_ifindex(int ifindex)
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{
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struct cfg80211_registered_device *drv = ERR_PTR(-ENODEV);
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struct net_device *dev;
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mutex_lock(&cfg80211_drv_mutex);
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dev = dev_get_by_index(&init_net, ifindex);
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if (!dev)
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goto out;
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if (dev->ieee80211_ptr) {
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drv = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
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mutex_lock(&drv->mtx);
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} else
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drv = ERR_PTR(-ENODEV);
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dev_put(dev);
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out:
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mutex_unlock(&cfg80211_drv_mutex);
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return drv;
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}
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void cfg80211_put_dev(struct cfg80211_registered_device *drv)
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{
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BUG_ON(IS_ERR(drv));
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mutex_unlock(&drv->mtx);
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}
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int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
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char *newname)
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{
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int idx, taken = -1, result, digits;
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/* prohibit calling the thing phy%d when %d is not its number */
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sscanf(newname, PHY_NAME "%d%n", &idx, &taken);
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if (taken == strlen(newname) && idx != rdev->idx) {
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/* count number of places needed to print idx */
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digits = 1;
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while (idx /= 10)
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digits++;
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/*
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* deny the name if it is phy<idx> where <idx> is printed
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* without leading zeroes. taken == strlen(newname) here
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*/
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if (taken == strlen(PHY_NAME) + digits)
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return -EINVAL;
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}
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/* this will check for collisions */
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result = device_rename(&rdev->wiphy.dev, newname);
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if (result)
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return result;
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if (!debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
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rdev->wiphy.debugfsdir,
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rdev->wiphy.debugfsdir->d_parent,
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newname))
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printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
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newname);
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nl80211_notify_dev_rename(rdev);
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return 0;
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}
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/* exported functions */
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struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv)
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@ -204,10 +345,16 @@ static int cfg80211_init(void)
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if (err)
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goto out_fail_notifier;
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err = nl80211_init();
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if (err)
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goto out_fail_nl80211;
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ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
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return 0;
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out_fail_nl80211:
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unregister_netdevice_notifier(&cfg80211_netdev_notifier);
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out_fail_notifier:
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wiphy_sysfs_exit();
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out_fail_sysfs:
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@ -218,6 +365,7 @@ subsys_initcall(cfg80211_init);
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static void cfg80211_exit(void)
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{
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debugfs_remove(ieee80211_debugfs_dir);
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nl80211_exit();
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unregister_netdevice_notifier(&cfg80211_netdev_notifier);
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wiphy_sysfs_exit();
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}
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@ -43,7 +43,39 @@ struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
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extern struct mutex cfg80211_drv_mutex;
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extern struct list_head cfg80211_drv_list;
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/*
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* This function returns a pointer to the driver
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* that the genl_info item that is passed refers to.
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* If successful, it returns non-NULL and also locks
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* the driver's mutex!
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*
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* This means that you need to call cfg80211_put_dev()
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* before being allowed to acquire &cfg80211_drv_mutex!
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*
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* This is necessary because we need to lock the global
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* mutex to get an item off the list safely, and then
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* we lock the drv mutex so it doesn't go away under us.
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*
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* We don't want to keep cfg80211_drv_mutex locked
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* for all the time in order to allow requests on
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* other interfaces to go through at the same time.
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*
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* The result of this can be a PTR_ERR and hence must
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* be checked with IS_ERR() for errors.
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*/
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extern struct cfg80211_registered_device *
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cfg80211_get_dev_from_info(struct genl_info *info);
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/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
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extern struct cfg80211_registered_device *
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cfg80211_get_dev_from_ifindex(int ifindex);
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extern void cfg80211_put_dev(struct cfg80211_registered_device *drv);
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/* free object */
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extern void cfg80211_dev_free(struct cfg80211_registered_device *drv);
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extern int cfg80211_dev_rename(struct cfg80211_registered_device *drv,
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char *newname);
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#endif /* __NET_WIRELESS_CORE_H */
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|
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@ -0,0 +1,431 @@
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/*
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* This is the new netlink-based wireless configuration interface.
|
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*
|
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* Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
|
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*/
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#include <linux/if.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/list.h>
|
||||
#include <linux/if_ether.h>
|
||||
#include <linux/ieee80211.h>
|
||||
#include <linux/nl80211.h>
|
||||
#include <linux/rtnetlink.h>
|
||||
#include <linux/netlink.h>
|
||||
#include <net/genetlink.h>
|
||||
#include <net/cfg80211.h>
|
||||
#include "core.h"
|
||||
#include "nl80211.h"
|
||||
|
||||
/* the netlink family */
|
||||
static struct genl_family nl80211_fam = {
|
||||
.id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
|
||||
.name = "nl80211", /* have users key off the name instead */
|
||||
.hdrsize = 0, /* no private header */
|
||||
.version = 1, /* no particular meaning now */
|
||||
.maxattr = NL80211_ATTR_MAX,
|
||||
};
|
||||
|
||||
/* internal helper: get drv and dev */
|
||||
static int get_drv_dev_by_info_ifindex(struct genl_info *info,
|
||||
struct cfg80211_registered_device **drv,
|
||||
struct net_device **dev)
|
||||
{
|
||||
int ifindex;
|
||||
|
||||
if (!info->attrs[NL80211_ATTR_IFINDEX])
|
||||
return -EINVAL;
|
||||
|
||||
ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
|
||||
*dev = dev_get_by_index(&init_net, ifindex);
|
||||
if (!*dev)
|
||||
return -ENODEV;
|
||||
|
||||
*drv = cfg80211_get_dev_from_ifindex(ifindex);
|
||||
if (IS_ERR(*drv)) {
|
||||
dev_put(*dev);
|
||||
return PTR_ERR(*drv);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* policy for the attributes */
|
||||
static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
|
||||
[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
|
||||
[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
|
||||
.len = BUS_ID_SIZE-1 },
|
||||
|
||||
[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
|
||||
[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
|
||||
[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
|
||||
};
|
||||
|
||||
/* message building helper */
|
||||
static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
|
||||
int flags, u8 cmd)
|
||||
{
|
||||
/* since there is no private header just add the generic one */
|
||||
return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
|
||||
}
|
||||
|
||||
/* netlink command implementations */
|
||||
|
||||
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
|
||||
struct cfg80211_registered_device *dev)
|
||||
{
|
||||
void *hdr;
|
||||
|
||||
hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
|
||||
if (!hdr)
|
||||
return -1;
|
||||
|
||||
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);
|
||||
NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
|
||||
return genlmsg_end(msg, hdr);
|
||||
|
||||
nla_put_failure:
|
||||
return genlmsg_cancel(msg, hdr);
|
||||
}
|
||||
|
||||
static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
|
||||
{
|
||||
int idx = 0;
|
||||
int start = cb->args[0];
|
||||
struct cfg80211_registered_device *dev;
|
||||
|
||||
mutex_lock(&cfg80211_drv_mutex);
|
||||
list_for_each_entry(dev, &cfg80211_drv_list, list) {
|
||||
if (++idx < start)
|
||||
continue;
|
||||
if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
|
||||
cb->nlh->nlmsg_seq, NLM_F_MULTI,
|
||||
dev) < 0)
|
||||
break;
|
||||
}
|
||||
mutex_unlock(&cfg80211_drv_mutex);
|
||||
|
||||
cb->args[0] = idx;
|
||||
|
||||
return skb->len;
|
||||
}
|
||||
|
||||
static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
struct sk_buff *msg;
|
||||
struct cfg80211_registered_device *dev;
|
||||
|
||||
dev = cfg80211_get_dev_from_info(info);
|
||||
if (IS_ERR(dev))
|
||||
return PTR_ERR(dev);
|
||||
|
||||
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
||||
if (!msg)
|
||||
goto out_err;
|
||||
|
||||
if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
|
||||
goto out_free;
|
||||
|
||||
cfg80211_put_dev(dev);
|
||||
|
||||
return genlmsg_unicast(msg, info->snd_pid);
|
||||
|
||||
out_free:
|
||||
nlmsg_free(msg);
|
||||
out_err:
|
||||
cfg80211_put_dev(dev);
|
||||
return -ENOBUFS;
|
||||
}
|
||||
|
||||
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
struct cfg80211_registered_device *rdev;
|
||||
int result;
|
||||
|
||||
if (!info->attrs[NL80211_ATTR_WIPHY_NAME])
|
||||
return -EINVAL;
|
||||
|
||||
rdev = cfg80211_get_dev_from_info(info);
|
||||
if (IS_ERR(rdev))
|
||||
return PTR_ERR(rdev);
|
||||
|
||||
result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
|
||||
|
||||
cfg80211_put_dev(rdev);
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
|
||||
struct net_device *dev)
|
||||
{
|
||||
void *hdr;
|
||||
|
||||
hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
|
||||
if (!hdr)
|
||||
return -1;
|
||||
|
||||
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
|
||||
NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
|
||||
/* TODO: interface type */
|
||||
return genlmsg_end(msg, hdr);
|
||||
|
||||
nla_put_failure:
|
||||
return genlmsg_cancel(msg, hdr);
|
||||
}
|
||||
|
||||
static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
|
||||
{
|
||||
int wp_idx = 0;
|
||||
int if_idx = 0;
|
||||
int wp_start = cb->args[0];
|
||||
int if_start = cb->args[1];
|
||||
struct cfg80211_registered_device *dev;
|
||||
struct wireless_dev *wdev;
|
||||
|
||||
mutex_lock(&cfg80211_drv_mutex);
|
||||
list_for_each_entry(dev, &cfg80211_drv_list, list) {
|
||||
if (++wp_idx < wp_start)
|
||||
continue;
|
||||
if_idx = 0;
|
||||
|
||||
mutex_lock(&dev->devlist_mtx);
|
||||
list_for_each_entry(wdev, &dev->netdev_list, list) {
|
||||
if (++if_idx < if_start)
|
||||
continue;
|
||||
if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
|
||||
cb->nlh->nlmsg_seq, NLM_F_MULTI,
|
||||
wdev->netdev) < 0)
|
||||
break;
|
||||
}
|
||||
mutex_unlock(&dev->devlist_mtx);
|
||||
}
|
||||
mutex_unlock(&cfg80211_drv_mutex);
|
||||
|
||||
cb->args[0] = wp_idx;
|
||||
cb->args[1] = if_idx;
|
||||
|
||||
return skb->len;
|
||||
}
|
||||
|
||||
static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
struct sk_buff *msg;
|
||||
struct cfg80211_registered_device *dev;
|
||||
struct net_device *netdev;
|
||||
int err;
|
||||
|
||||
err = get_drv_dev_by_info_ifindex(info, &dev, &netdev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
||||
if (!msg)
|
||||
goto out_err;
|
||||
|
||||
if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
|
||||
goto out_free;
|
||||
|
||||
dev_put(netdev);
|
||||
cfg80211_put_dev(dev);
|
||||
|
||||
return genlmsg_unicast(msg, info->snd_pid);
|
||||
|
||||
out_free:
|
||||
nlmsg_free(msg);
|
||||
out_err:
|
||||
dev_put(netdev);
|
||||
cfg80211_put_dev(dev);
|
||||
return -ENOBUFS;
|
||||
}
|
||||
|
||||
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
struct cfg80211_registered_device *drv;
|
||||
int err, ifindex;
|
||||
enum nl80211_iftype type;
|
||||
struct net_device *dev;
|
||||
|
||||
if (info->attrs[NL80211_ATTR_IFTYPE]) {
|
||||
type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
|
||||
if (type > NL80211_IFTYPE_MAX)
|
||||
return -EINVAL;
|
||||
} else
|
||||
return -EINVAL;
|
||||
|
||||
err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
|
||||
if (err)
|
||||
return err;
|
||||
ifindex = dev->ifindex;
|
||||
dev_put(dev);
|
||||
|
||||
if (!drv->ops->change_virtual_intf) {
|
||||
err = -EOPNOTSUPP;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
rtnl_lock();
|
||||
err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex, type);
|
||||
rtnl_unlock();
|
||||
|
||||
unlock:
|
||||
cfg80211_put_dev(drv);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
struct cfg80211_registered_device *drv;
|
||||
int err;
|
||||
enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
|
||||
|
||||
if (!info->attrs[NL80211_ATTR_IFNAME])
|
||||
return -EINVAL;
|
||||
|
||||
if (info->attrs[NL80211_ATTR_IFTYPE]) {
|
||||
type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
|
||||
if (type > NL80211_IFTYPE_MAX)
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
drv = cfg80211_get_dev_from_info(info);
|
||||
if (IS_ERR(drv))
|
||||
return PTR_ERR(drv);
|
||||
|
||||
if (!drv->ops->add_virtual_intf) {
|
||||
err = -EOPNOTSUPP;
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
rtnl_lock();
|
||||
err = drv->ops->add_virtual_intf(&drv->wiphy,
|
||||
nla_data(info->attrs[NL80211_ATTR_IFNAME]), type);
|
||||
rtnl_unlock();
|
||||
|
||||
unlock:
|
||||
cfg80211_put_dev(drv);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
struct cfg80211_registered_device *drv;
|
||||
int ifindex, err;
|
||||
struct net_device *dev;
|
||||
|
||||
err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
|
||||
if (err)
|
||||
return err;
|
||||
ifindex = dev->ifindex;
|
||||
dev_put(dev);
|
||||
|
||||
if (!drv->ops->del_virtual_intf) {
|
||||
err = -EOPNOTSUPP;
|
||||
goto out;
|
||||
}
|
||||
|
||||
rtnl_lock();
|
||||
err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
|
||||
rtnl_unlock();
|
||||
|
||||
out:
|
||||
cfg80211_put_dev(drv);
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct genl_ops nl80211_ops[] = {
|
||||
{
|
||||
.cmd = NL80211_CMD_GET_WIPHY,
|
||||
.doit = nl80211_get_wiphy,
|
||||
.dumpit = nl80211_dump_wiphy,
|
||||
.policy = nl80211_policy,
|
||||
/* can be retrieved by unprivileged users */
|
||||
},
|
||||
{
|
||||
.cmd = NL80211_CMD_SET_WIPHY,
|
||||
.doit = nl80211_set_wiphy,
|
||||
.policy = nl80211_policy,
|
||||
.flags = GENL_ADMIN_PERM,
|
||||
},
|
||||
{
|
||||
.cmd = NL80211_CMD_GET_INTERFACE,
|
||||
.doit = nl80211_get_interface,
|
||||
.dumpit = nl80211_dump_interface,
|
||||
.policy = nl80211_policy,
|
||||
/* can be retrieved by unprivileged users */
|
||||
},
|
||||
{
|
||||
.cmd = NL80211_CMD_SET_INTERFACE,
|
||||
.doit = nl80211_set_interface,
|
||||
.policy = nl80211_policy,
|
||||
.flags = GENL_ADMIN_PERM,
|
||||
},
|
||||
{
|
||||
.cmd = NL80211_CMD_NEW_INTERFACE,
|
||||
.doit = nl80211_new_interface,
|
||||
.policy = nl80211_policy,
|
||||
.flags = GENL_ADMIN_PERM,
|
||||
},
|
||||
{
|
||||
.cmd = NL80211_CMD_DEL_INTERFACE,
|
||||
.doit = nl80211_del_interface,
|
||||
.policy = nl80211_policy,
|
||||
.flags = GENL_ADMIN_PERM,
|
||||
},
|
||||
};
|
||||
|
||||
/* multicast groups */
|
||||
static struct genl_multicast_group nl80211_config_mcgrp = {
|
||||
.name = "config",
|
||||
};
|
||||
|
||||
/* notification functions */
|
||||
|
||||
void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
|
||||
{
|
||||
struct sk_buff *msg;
|
||||
|
||||
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
||||
if (!msg)
|
||||
return;
|
||||
|
||||
if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
|
||||
nlmsg_free(msg);
|
||||
return;
|
||||
}
|
||||
|
||||
genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
|
||||
}
|
||||
|
||||
/* initialisation/exit functions */
|
||||
|
||||
int nl80211_init(void)
|
||||
{
|
||||
int err, i;
|
||||
|
||||
err = genl_register_family(&nl80211_fam);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
|
||||
err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
|
||||
if (err)
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
|
||||
if (err)
|
||||
goto err_out;
|
||||
|
||||
return 0;
|
||||
err_out:
|
||||
genl_unregister_family(&nl80211_fam);
|
||||
return err;
|
||||
}
|
||||
|
||||
void nl80211_exit(void)
|
||||
{
|
||||
genl_unregister_family(&nl80211_fam);
|
||||
}
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
#ifndef __NET_WIRELESS_NL80211_H
|
||||
#define __NET_WIRELESS_NL80211_H
|
||||
|
||||
#include "core.h"
|
||||
|
||||
#ifdef CONFIG_NL80211
|
||||
extern int nl80211_init(void);
|
||||
extern void nl80211_exit(void);
|
||||
extern void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev);
|
||||
#else
|
||||
static inline int nl80211_init(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
static inline void nl80211_exit(void)
|
||||
{
|
||||
}
|
||||
static inline void nl80211_notify_dev_rename(
|
||||
struct cfg80211_registered_device *rdev)
|
||||
{
|
||||
}
|
||||
#endif /* CONFIG_NL80211 */
|
||||
|
||||
#endif /* __NET_WIRELESS_NL80211_H */
|
||||
Loading…
Reference in New Issue