/* * This file implement the Wireless Extensions core API. * * Authors : Jean Tourrilhes - HPL - <[email protected]> * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved. * Copyright 2009 Johannes Berg <[email protected]> * Copyright (C) 2024 Intel Corporation * * (As all part of the Linux kernel, this file is GPL) */ #include <linux/kernel.h> #include <linux/netdevice.h> #include <linux/rtnetlink.h> #include <linux/slab.h> #include <linux/wireless.h> #include <linux/uaccess.h> #include <linux/export.h> #include <net/cfg80211.h> #include <net/iw_handler.h> #include <net/netlink.h> #include <net/wext.h> #include <net/net_namespace.h> wext_ioctl_func; /* * Meta-data about all the standard Wireless Extension request we * know about. */ static const struct iw_ioctl_description standard_ioctl[] = …; static const unsigned int standard_ioctl_num = …; /* * Meta-data about all the additional standard Wireless Extension events * we know about. */ static const struct iw_ioctl_description standard_event[] = …; static const unsigned int standard_event_num = …; /* Size (in bytes) of various events */ static const int event_type_size[] = …; #ifdef CONFIG_COMPAT static const int compat_event_type_size[] = …; #endif /* IW event code */ void wireless_nlevent_flush(void) { … } EXPORT_SYMBOL_GPL(…); static int wext_netdev_notifier_call(struct notifier_block *nb, unsigned long state, void *ptr) { … } static struct notifier_block wext_netdev_notifier = …; static int __net_init wext_pernet_init(struct net *net) { … } static void __net_exit wext_pernet_exit(struct net *net) { … } static struct pernet_operations wext_pernet_ops = …; static int __init wireless_nlevent_init(void) { … } subsys_initcall(wireless_nlevent_init); /* Process events generated by the wireless layer or the driver. */ static void wireless_nlevent_process(struct work_struct *work) { … } static DECLARE_WORK(wireless_nlevent_work, wireless_nlevent_process); static struct nlmsghdr *rtnetlink_ifinfo_prep(struct net_device *dev, struct sk_buff *skb) { … } /* * Main event dispatcher. Called from other parts and drivers. * Send the event on the appropriate channels. * May be called from interrupt context. */ void wireless_send_event(struct net_device * dev, unsigned int cmd, union iwreq_data * wrqu, const char * extra) { … } EXPORT_SYMBOL(…); #ifdef CONFIG_CFG80211_WEXT static void wireless_warn_cfg80211_wext(void) { … } #endif /* IW handlers */ struct iw_statistics *get_wireless_stats(struct net_device *dev) { … } /* noinline to avoid a bogus warning with -O3 */ static noinline int iw_handler_get_iwstats(struct net_device * dev, struct iw_request_info * info, union iwreq_data * wrqu, char * extra) { … } static iw_handler get_handler(struct net_device *dev, unsigned int cmd) { … } static int ioctl_standard_iw_point(struct iw_point *iwp, unsigned int cmd, const struct iw_ioctl_description *descr, iw_handler handler, struct net_device *dev, struct iw_request_info *info) { … } /* * Call the commit handler in the driver * (if exist and if conditions are right) * * Note : our current commit strategy is currently pretty dumb, * but we will be able to improve on that... * The goal is to try to agreagate as many changes as possible * before doing the commit. Drivers that will define a commit handler * are usually those that need a reset after changing parameters, so * we want to minimise the number of reset. * A cool idea is to use a timer : at each "set" command, we re-set the * timer, when the timer eventually fires, we call the driver. * Hopefully, more on that later. * * Also, I'm waiting to see how many people will complain about the * netif_running(dev) test. I'm open on that one... * Hopefully, the driver will remember to do a commit in "open()" ;-) */ int call_commit_handler(struct net_device *dev) { … } /* * Main IOCTl dispatcher. * Check the type of IOCTL and call the appropriate wrapper... */ static int wireless_process_ioctl(struct net *net, struct iwreq *iwr, unsigned int cmd, struct iw_request_info *info, wext_ioctl_func standard, wext_ioctl_func private) { … } /* If command is `set a parameter', or `get the encoding parameters', * check if the user has the right to do it. */ static int wext_permission_check(unsigned int cmd) { … } /* entry point from dev ioctl */ static int wext_ioctl_dispatch(struct net *net, struct iwreq *iwr, unsigned int cmd, struct iw_request_info *info, wext_ioctl_func standard, wext_ioctl_func private) { … } /* * Wrapper to call a standard Wireless Extension handler. * We do various checks and also take care of moving data between * user space and kernel space. */ static int ioctl_standard_call(struct net_device * dev, struct iwreq *iwr, unsigned int cmd, struct iw_request_info *info, iw_handler handler) { … } int wext_handle_ioctl(struct net *net, unsigned int cmd, void __user *arg) { … } #ifdef CONFIG_COMPAT static int compat_standard_call(struct net_device *dev, struct iwreq *iwr, unsigned int cmd, struct iw_request_info *info, iw_handler handler) { … } int compat_wext_handle_ioctl(struct net *net, unsigned int cmd, unsigned long arg) { … } #endif char *iwe_stream_add_event(struct iw_request_info *info, char *stream, char *ends, struct iw_event *iwe, int event_len) { … } EXPORT_SYMBOL(…); char *iwe_stream_add_point(struct iw_request_info *info, char *stream, char *ends, struct iw_event *iwe, char *extra) { … } EXPORT_SYMBOL(…); char *iwe_stream_add_value(struct iw_request_info *info, char *event, char *value, char *ends, struct iw_event *iwe, int event_len) { … } EXPORT_SYMBOL(…);
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