cregit-Linux how code gets into the kernel

Release 4.14 net/wireless/ibss.c

Directory: net/wireless
// SPDX-License-Identifier: GPL-2.0
/*
 * Some IBSS support code for cfg80211.
 *
 * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
 */

#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <net/cfg80211.h>
#include "wext-compat.h"
#include "nl80211.h"
#include "rdev-ops.h"



void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, struct ieee80211_channel *channel) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_bss *bss; #ifdef CONFIG_CFG80211_WEXT union iwreq_data wrqu; #endif if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC)) return; if (!wdev->ssid_len) return; bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0, IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY); if (WARN_ON(!bss)) return; if (wdev->current_bss) { cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); } cfg80211_hold_bss(bss_from_pub(bss)); wdev->current_bss = bss_from_pub(bss); if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP)) cfg80211_upload_connect_keys(wdev); nl80211_send_ibss_bssid(wiphy_to_rdev(wdev->wiphy), dev, bssid, GFP_KERNEL); #ifdef CONFIG_CFG80211_WEXT memset(&wrqu, 0, sizeof(wrqu)); memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg19288.89%660.00%
David Spinadel136.02%110.00%
Antonio Quartulli83.70%110.00%
Dedy Lansky20.93%110.00%
Zhao, Gang10.46%110.00%
Total216100.00%10100.00%


void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, struct ieee80211_channel *channel, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); struct cfg80211_event *ev; unsigned long flags; trace_cfg80211_ibss_joined(dev, bssid, channel); if (WARN_ON(!channel)) return; ev = kzalloc(sizeof(*ev), gfp); if (!ev) return; ev->type = EVENT_IBSS_JOINED; memcpy(ev->ij.bssid, bssid, ETH_ALEN); ev->ij.channel = channel; spin_lock_irqsave(&wdev->event_lock, flags); list_add_tail(&ev->list, &wdev->event_list); spin_unlock_irqrestore(&wdev->event_lock, flags); queue_work(cfg80211_wq, &rdev->event_work); }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg12477.50%120.00%
Antonio Quartulli2515.62%120.00%
Beni Lev74.38%120.00%
Alban Browaeys31.88%120.00%
Zhao, Gang10.62%120.00%
Total160100.00%5100.00%

EXPORT_SYMBOL(cfg80211_ibss_joined);
static int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_ibss_params *params, struct cfg80211_cached_keys *connkeys) { struct wireless_dev *wdev = dev->ieee80211_ptr; int err; ASSERT_WDEV_LOCK(wdev); if (wdev->ssid_len) return -EALREADY; if (!params->basic_rates) { /* * If no rates were explicitly configured, * use the mandatory rate set for 11b or * 11a for maximum compatibility. */ struct ieee80211_supported_band *sband = rdev->wiphy.bands[params->chandef.chan->band]; int j; u32 flag = params->chandef.chan->band == NL80211_BAND_5GHZ ? IEEE80211_RATE_MANDATORY_A : IEEE80211_RATE_MANDATORY_B; for (j = 0; j < sband->n_bitrates; j++) { if (sband->bitrates[j].flags & flag) params->basic_rates |= BIT(j); } } if (WARN_ON(connkeys && connkeys->def < 0)) return -EINVAL; if (WARN_ON(wdev->connect_keys)) kzfree(wdev->connect_keys); wdev->connect_keys = connkeys; wdev->ibss_fixed = params->channel_fixed; wdev->ibss_dfs_possible = params->userspace_handles_dfs; wdev->chandef = params->chandef; #ifdef CONFIG_CFG80211_WEXT wdev->wext.ibss.chandef = params->chandef; #endif err = rdev_join_ibss(rdev, dev, params); if (err) { wdev->connect_keys = NULL; return err; } memcpy(wdev->ssid, params->ssid, params->ssid_len); wdev->ssid_len = params->ssid_len; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg24689.78%1062.50%
Michal Kazior186.57%318.75%
Simon Wunderlich82.92%16.25%
Zhao, Gang10.36%16.25%
Hila Gonen10.36%16.25%
Total274100.00%16100.00%


int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_ibss_params *params, struct cfg80211_cached_keys *connkeys) { struct wireless_dev *wdev = dev->ieee80211_ptr; int err; ASSERT_RTNL(); wdev_lock(wdev); err = __cfg80211_join_ibss(rdev, dev, params, connkeys); wdev_unlock(wdev); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg66100.00%4100.00%
Total66100.00%4100.00%


static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); int i; ASSERT_WDEV_LOCK(wdev); kzfree(wdev->connect_keys); wdev->connect_keys = NULL; rdev_set_qos_map(rdev, dev, NULL); /* * Delete all the keys ... pairwise keys can't really * exist any more anyway, but default keys might. */ if (rdev->ops->del_key) for (i = 0; i < 6; i++) rdev_del_key(rdev, dev, i, false, NULL); if (wdev->current_bss) { cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); } wdev->current_bss = NULL; wdev->ssid_len = 0; memset(&wdev->chandef, 0, sizeof(wdev->chandef)); #ifdef CONFIG_CFG80211_WEXT if (!nowext) wdev->wext.ibss.ssid_len = 0; #endif cfg80211_sched_dfs_chan_update(rdev); }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg14981.42%1066.67%
Michal Kazior179.29%16.67%
Kyeyoon Park94.92%16.67%
Vasanthakumar Thiagarajan52.73%16.67%
Hila Gonen21.09%16.67%
Zhao, Gang10.55%16.67%
Total183100.00%15100.00%


void cfg80211_clear_ibss(struct net_device *dev, bool nowext) { struct wireless_dev *wdev = dev->ieee80211_ptr; wdev_lock(wdev); __cfg80211_clear_ibss(dev, nowext); wdev_unlock(wdev); }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg39100.00%1100.00%
Total39100.00%1100.00%


int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, struct net_device *dev, bool nowext) { struct wireless_dev *wdev = dev->ieee80211_ptr; int err; ASSERT_WDEV_LOCK(wdev); if (!wdev->ssid_len) return -ENOLINK; err = rdev_leave_ibss(rdev, dev); if (err) return err; __cfg80211_clear_ibss(dev, nowext); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg7198.61%480.00%
Hila Gonen11.39%120.00%
Total72100.00%5100.00%


int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, struct net_device *dev, bool nowext) { struct wireless_dev *wdev = dev->ieee80211_ptr; int err; wdev_lock(wdev); err = __cfg80211_leave_ibss(rdev, dev, nowext); wdev_unlock(wdev); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg54100.00%1100.00%
Total54100.00%1100.00%

#ifdef CONFIG_CFG80211_WEXT
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev) { struct cfg80211_cached_keys *ck = NULL; enum nl80211_band band; int i, err; ASSERT_WDEV_LOCK(wdev); if (!wdev->wext.ibss.beacon_interval) wdev->wext.ibss.beacon_interval = 100; /* try to find an IBSS channel if none requested ... */ if (!wdev->wext.ibss.chandef.chan) { struct ieee80211_channel *new_chan = NULL; for (band = 0; band < NUM_NL80211_BANDS; band++) { struct ieee80211_supported_band *sband; struct ieee80211_channel *chan; sband = rdev->wiphy.bands[band]; if (!sband) continue; for (i = 0; i < sband->n_channels; i++) { chan = &sband->channels[i]; if (chan->flags & IEEE80211_CHAN_NO_IR) continue; if (chan->flags & IEEE80211_CHAN_DISABLED) continue; new_chan = chan; break; } if (new_chan) break; } if (!new_chan) return -EINVAL; cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan, NL80211_CHAN_NO_HT); } /* don't join -- SSID is not there */ if (!wdev->wext.ibss.ssid_len) return 0; if (!netif_running(wdev->netdev)) return 0; if (wdev->wext.keys) wdev->wext.keys->def = wdev->wext.default_key; wdev->wext.ibss.privacy = wdev->wext.default_key != -1; if (wdev->wext.keys && wdev->wext.keys->def != -1) { ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL); if (!ck) return -ENOMEM; for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) ck->params[i].key = ck->data[i]; } err = __cfg80211_join_ibss(rdev, wdev->netdev, &wdev->wext.ibss, ck); if (err) kfree(ck); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg35092.35%763.64%
Simon Wunderlich246.33%19.09%
Bruno Randolf30.79%19.09%
Luis R. Rodriguez10.26%19.09%
David Spinadel10.26%19.09%
Total379100.00%11100.00%


int cfg80211_ibss_wext_siwfreq(struct net_device *dev, struct iw_request_info *info, struct iw_freq *wextfreq, char *extra) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); struct ieee80211_channel *chan = NULL; int err, freq; /* call only for ibss! */ if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC)) return -EINVAL; if (!rdev->ops->join_ibss) return -EOPNOTSUPP; freq = cfg80211_wext_freq(wextfreq); if (freq < 0) return freq; if (freq) { chan = ieee80211_get_channel(wdev->wiphy, freq); if (!chan) return -EINVAL; if (chan->flags & IEEE80211_CHAN_NO_IR || chan->flags & IEEE80211_CHAN_DISABLED) return -EINVAL; } if (wdev->wext.ibss.chandef.chan == chan) return 0; wdev_lock(wdev); err = 0; if (wdev->ssid_len) err = __cfg80211_leave_ibss(rdev, dev, true); wdev_unlock(wdev); if (err) return err; if (chan) { cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan, NL80211_CHAN_NO_HT); wdev->wext.ibss.channel_fixed = true; } else { /* cfg80211_ibss_wext_join will pick one if needed */ wdev->wext.ibss.channel_fixed = false; } wdev_lock(wdev); err = cfg80211_ibss_wext_join(rdev, wdev); wdev_unlock(wdev); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg25394.05%763.64%
Simon Wunderlich72.60%19.09%
Bruno Randolf72.60%19.09%
Luis R. Rodriguez10.37%19.09%
Zhao, Gang10.37%19.09%
Total269100.00%11100.00%


int cfg80211_ibss_wext_giwfreq(struct net_device *dev, struct iw_request_info *info, struct iw_freq *freq, char *extra) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct ieee80211_channel *chan = NULL; /* call only for ibss! */ if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC)) return -EINVAL; wdev_lock(wdev); if (wdev->current_bss) chan = wdev->current_bss->pub.channel; else if (wdev->wext.ibss.chandef.chan) chan = wdev->wext.ibss.chandef.chan; wdev_unlock(wdev); if (chan) { freq->m = chan->center_freq; freq->e = 6; return 0; } /* no channel if not joining */ return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg135100.00%5100.00%
Total135100.00%5100.00%


int cfg80211_ibss_wext_siwessid(struct net_device *dev, struct iw_request_info *info, struct iw_point *data, char *ssid) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); size_t len = data->length; int err; /* call only for ibss! */ if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC)) return -EINVAL; if (!rdev->ops->join_ibss) return -EOPNOTSUPP; wdev_lock(wdev); err = 0; if (wdev->ssid_len) err = __cfg80211_leave_ibss(rdev, dev, true); wdev_unlock(wdev); if (err) return err; /* iwconfig uses nul termination in SSID.. */ if (len > 0 && ssid[len - 1] == '\0') len--; memcpy(wdev->ssid, ssid, len); wdev->wext.ibss.ssid = wdev->ssid; wdev->wext.ibss.ssid_len = len; wdev_lock(wdev); err = cfg80211_ibss_wext_join(rdev, wdev); wdev_unlock(wdev); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg19599.49%787.50%
Zhao, Gang10.51%112.50%
Total196100.00%8100.00%


int cfg80211_ibss_wext_giwessid(struct net_device *dev, struct iw_request_info *info, struct iw_point *data, char *ssid) { struct wireless_dev *wdev = dev->ieee80211_ptr; /* call only for ibss! */ if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC)) return -EINVAL; data->flags = 0; wdev_lock(wdev); if (wdev->ssid_len) { data->flags = 1; data->length = wdev->ssid_len; memcpy(ssid, wdev->ssid, data->length); } else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) { data->flags = 1; data->length = wdev->wext.ibss.ssid_len; memcpy(ssid, wdev->wext.ibss.ssid, data->length); } wdev_unlock(wdev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg159100.00%4100.00%
Total159100.00%4100.00%


int cfg80211_ibss_wext_siwap(struct net_device *dev, struct iw_request_info *info, struct sockaddr *ap_addr, char *extra) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); u8 *bssid = ap_addr->sa_data; int err; /* call only for ibss! */ if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC)) return -EINVAL; if (!rdev->ops->join_ibss) return -EOPNOTSUPP; if (ap_addr->sa_family != ARPHRD_ETHER) return -EINVAL; /* automatic mode */ if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid)) bssid = NULL; if (bssid && !is_valid_ether_addr(bssid)) return -EINVAL; /* both automatic */ if (!bssid && !wdev->wext.ibss.bssid) return 0; /* fixed already - and no change */ if (wdev->wext.ibss.bssid && bssid && ether_addr_equal(bssid, wdev->wext.ibss.bssid)) return 0; wdev_lock(wdev); err = 0; if (wdev->ssid_len) err = __cfg80211_leave_ibss(rdev, dev, true); wdev_unlock(wdev); if (err) return err; if (bssid) { memcpy(wdev->wext.bssid, bssid, ETH_ALEN); wdev->wext.ibss.bssid = wdev->wext.bssid; } else wdev->wext.ibss.bssid = NULL; wdev_lock(wdev); err = cfg80211_ibss_wext_join(rdev, wdev); wdev_unlock(wdev); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg27799.28%777.78%
Zhao, Gang10.36%111.11%
Joe Perches10.36%111.11%
Total279100.00%9100.00%


int cfg80211_ibss_wext_giwap(struct net_device *dev, struct iw_request_info *info, struct sockaddr *ap_addr, char *extra) { struct wireless_dev *wdev = dev->ieee80211_ptr; /* call only for ibss! */ if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC)) return -EINVAL; ap_addr->sa_family = ARPHRD_ETHER; wdev_lock(wdev); if (wdev->current_bss) memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN); else if (wdev->wext.ibss.bssid) memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN); else eth_zero_addr(ap_addr->sa_data); wdev_unlock(wdev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg10885.04%466.67%
Yi Zhu1814.17%116.67%
Joe Perches10.79%116.67%
Total127100.00%6100.00%

#endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg244492.44%2248.89%
Simon Wunderlich391.48%24.44%
Michal Kazior351.32%36.67%
Antonio Quartulli331.25%12.22%
Yi Zhu180.68%12.22%
David Spinadel140.53%12.22%
Bruno Randolf100.38%12.22%
Kyeyoon Park90.34%12.22%
Zhao, Gang70.26%24.44%
Hila Gonen70.26%12.22%
Beni Lev70.26%12.22%
Vasanthakumar Thiagarajan50.19%12.22%
Paul Gortmaker30.11%12.22%
Alban Browaeys30.11%12.22%
Tejun Heo30.11%12.22%
Luis R. Rodriguez20.08%12.22%
Joe Perches20.08%24.44%
Dedy Lansky20.08%12.22%
Greg Kroah-Hartman10.04%12.22%
Total2644100.00%45100.00%
Directory: net/wireless
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.