cregit-Linux how code gets into the kernel

Release 4.8 net/wireless/mlme.c

Directory: net/wireless
/*
 * cfg80211 MLME SAP interface
 *
 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
 * Copyright (c) 2015           Intel Deutschland GmbH
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/nl80211.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <net/cfg80211.h>
#include <net/iw_handler.h>
#include "core.h"
#include "nl80211.h"
#include "rdev-ops.h"



void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss, const u8 *buf, size_t len, int uapsd_queues) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; u8 *ie = mgmt->u.assoc_resp.variable; int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable); u16 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); trace_cfg80211_send_rx_assoc(dev, bss); /* * This is a bit of a hack, we don't notify userspace of * a (re-)association reply if we tried to send a reassoc * and got a reject -- we only try again with an assoc * frame instead of reassoc. */ if (cfg80211_sme_rx_assoc_resp(wdev, status_code)) { cfg80211_unhold_bss(bss_from_pub(bss)); cfg80211_put_bss(wiphy, bss); return; } nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL, uapsd_queues); /* update current_bss etc., consumes the bss reference */ __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs, status_code, status_code == WLAN_STATUS_SUCCESS, bss); }

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johannes bergjohannes berg13371.89%1280.00%
jouni malinenjouni malinen4624.86%16.67%
eliad pellereliad peller52.70%16.67%
zhao gangzhao gang10.54%16.67%
Total185100.00%15100.00%

EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
static void cfg80211_process_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL); cfg80211_sme_rx_auth(wdev, buf, len); }

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johannes bergjohannes berg3665.45%360.00%
jouni malinenjouni malinen1832.73%120.00%
zhao gangzhao gang11.82%120.00%
Total55100.00%5100.00%


static void cfg80211_process_deauth(struct wireless_dev *wdev, const u8 *buf, size_t len) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; const u8 *bssid = mgmt->bssid; u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr); nl80211_send_deauth(rdev, wdev->netdev, buf, len, GFP_KERNEL); if (!wdev->current_bss || !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) return; __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); cfg80211_sme_deauth(wdev); }

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johannes bergjohannes berg12891.43%770.00%
jouni malinenjouni malinen96.43%110.00%
joe perchesjoe perches21.43%110.00%
zhao gangzhao gang10.71%110.00%
Total140100.00%10100.00%


static void cfg80211_process_disassoc(struct wireless_dev *wdev, const u8 *buf, size_t len) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; const u8 *bssid = mgmt->bssid; u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr); nl80211_send_disassoc(rdev, wdev->netdev, buf, len, GFP_KERNEL); if (WARN_ON(!wdev->current_bss || !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) return; __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); cfg80211_sme_disassoc(wdev); }

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johannes bergjohannes berg9868.53%753.85%
jouni malinenjouni malinen3927.27%323.08%
pavel roskinpavel roskin42.80%17.69%
joe perchesjoe perches10.70%17.69%
zhao gangzhao gang10.70%17.69%
Total143100.00%13100.00%


void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct ieee80211_mgmt *mgmt = (void *)buf; ASSERT_WDEV_LOCK(wdev); trace_cfg80211_rx_mlme_mgmt(dev, buf, len); if (WARN_ON(len < 2)) return; if (ieee80211_is_auth(mgmt->frame_control)) cfg80211_process_auth(wdev, buf, len); else if (ieee80211_is_deauth(mgmt->frame_control)) cfg80211_process_deauth(wdev, buf, len); else if (ieee80211_is_disassoc(mgmt->frame_control)) cfg80211_process_disassoc(wdev, buf, len); }

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johannes bergjohannes berg118100.00%2100.00%
Total118100.00%2100.00%

EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); trace_cfg80211_send_auth_timeout(dev, addr); nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL); cfg80211_sme_auth_timeout(wdev); }

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johannes bergjohannes berg5887.88%466.67%
beni levbeni lev710.61%116.67%
zhao gangzhao gang11.52%116.67%
Total66100.00%6100.00%

EXPORT_SYMBOL(cfg80211_auth_timeout);
void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); trace_cfg80211_send_assoc_timeout(dev, bss->bssid); nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL); cfg80211_sme_assoc_timeout(wdev); cfg80211_unhold_bss(bss_from_pub(bss)); cfg80211_put_bss(wiphy, bss); }

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johannes bergjohannes berg5564.71%770.00%
jouni malinenjouni malinen2327.06%110.00%
beni levbeni lev67.06%110.00%
zhao gangzhao gang11.18%110.00%
Total85100.00%10100.00%

EXPORT_SYMBOL(cfg80211_assoc_timeout);
void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct ieee80211_mgmt *mgmt = (void *)buf; ASSERT_WDEV_LOCK(wdev); trace_cfg80211_tx_mlme_mgmt(dev, buf, len); if (WARN_ON(len < 2)) return; if (ieee80211_is_deauth(mgmt->frame_control)) cfg80211_process_deauth(wdev, buf, len); else cfg80211_process_disassoc(wdev, buf, len); }

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johannes bergjohannes berg90100.00%2100.00%
Total90100.00%2100.00%

EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr, enum nl80211_key_type key_type, int key_id, const u8 *tsc, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); #ifdef CONFIG_CFG80211_WEXT union iwreq_data wrqu; char *buf = kmalloc(128, gfp); if (buf) { sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" "keyid=%d %scast addr=%pM)", key_id, key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni", addr); memset(&wrqu, 0, sizeof(wrqu)); wrqu.data.length = strlen(buf); wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); kfree(buf); } #endif trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc); nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp); }

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johannes bergjohannes berg9254.76%350.00%
jouni malinenjouni malinen6236.90%116.67%
beni levbeni lev137.74%116.67%
zhao gangzhao gang10.60%116.67%
Total168100.00%6100.00%

EXPORT_SYMBOL(cfg80211_michael_mic_failure); /* some MLME handling for userspace SME */
int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, enum nl80211_auth_type auth_type, const u8 *bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, const u8 *key, int key_len, int key_idx, const u8 *sae_data, int sae_data_len) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_auth_request req = { .ie = ie, .ie_len = ie_len, .sae_data = sae_data, .sae_data_len = sae_data_len, .auth_type = auth_type, .key = key, .key_len = key_len, .key_idx = key_idx, }; int err; ASSERT_WDEV_LOCK(wdev); if (auth_type == NL80211_AUTHTYPE_SHARED_KEY) if (!key || !key_len || key_idx < 0 || key_idx > 4) return -EINVAL; if (wdev->current_bss && ether_addr_equal(bssid, wdev->current_bss->pub.bssid)) return -EALREADY; req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, IEEE80211_BSS_TYPE_ESS, IEEE80211_PRIVACY_ANY); if (!req.bss) return -ENOENT; err = rdev_auth(rdev, dev, &req); cfg80211_put_bss(&rdev->wiphy, req.bss); return err; }

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johannes bergjohannes berg22694.96%866.67%
jouni malinenjouni malinen83.36%18.33%
dedy lanskydedy lansky20.84%18.33%
hila gonenhila gonen10.42%18.33%
joe perchesjoe perches10.42%18.33%
Total238100.00%12100.00%

/* Do a logical ht_capa &= ht_capa_mask. */
void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, const struct ieee80211_ht_cap *ht_capa_mask) { int i; u8 *p1, *p2; if (!ht_capa_mask) { memset(ht_capa, 0, sizeof(*ht_capa)); return; } p1 = (u8*)(ht_capa); p2 = (u8*)(ht_capa_mask); for (i = 0; i<sizeof(*ht_capa); i++) p1[i] &= p2[i]; }

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ben greearben greear94100.00%1100.00%
Total94100.00%1100.00%

/* Do a logical ht_capa &= ht_capa_mask. */
void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, const struct ieee80211_vht_cap *vht_capa_mask) { int i; u8 *p1, *p2; if (!vht_capa_mask) { memset(vht_capa, 0, sizeof(*vht_capa)); return; } p1 = (u8*)(vht_capa); p2 = (u8*)(vht_capa_mask); for (i = 0; i < sizeof(*vht_capa); i++) p1[i] &= p2[i]; }

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johannes bergjohannes berg94100.00%1100.00%
Total94100.00%1100.00%


int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, const u8 *bssid, const u8 *ssid, int ssid_len, struct cfg80211_assoc_request *req) { struct wireless_dev *wdev = dev->ieee80211_ptr; int err; ASSERT_WDEV_LOCK(wdev); if (wdev->current_bss && (!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid, req->prev_bssid))) return -EALREADY; cfg80211_oper_and_ht_capa(&req->ht_capa_mask, rdev->wiphy.ht_capa_mod_mask); cfg80211_oper_and_vht_capa(&req->vht_capa_mask, rdev->wiphy.vht_capa_mod_mask); req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, IEEE80211_BSS_TYPE_ESS, IEEE80211_PRIVACY_ANY); if (!req->bss) return -ENOENT; err = rdev_assoc(rdev, dev, req); if (!err) cfg80211_hold_bss(bss_from_pub(req->bss)); else cfg80211_put_bss(&rdev->wiphy, req->bss); return err; }

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johannes bergjohannes berg16082.90%857.14%
ben greearben greear157.77%17.14%
jouni malinenjouni malinen136.74%17.14%
dedy lanskydedy lansky21.04%17.14%
luciano coelholuciano coelho10.52%17.14%
joe perchesjoe perches10.52%17.14%
hila gonenhila gonen10.52%17.14%
Total193100.00%14100.00%


int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, struct net_device *dev, const u8 *bssid, const u8 *ie, int ie_len, u16 reason, bool local_state_change) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_deauth_request req = { .bssid = bssid, .reason_code = reason, .ie = ie, .ie_len = ie_len, .local_state_change = local_state_change, }; ASSERT_WDEV_LOCK(wdev); if (local_state_change && (!wdev->current_bss || !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) return 0; return rdev_deauth(rdev, dev, &req); }

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johannes bergjohannes berg10084.75%450.00%
stanislaw gruszkastanislaw gruszka119.32%112.50%
jouni malinenjouni malinen54.24%112.50%
hila gonenhila gonen10.85%112.50%
joe perchesjoe perches10.85%112.50%
Total118100.00%8100.00%


int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, struct net_device *dev, const u8 *bssid, const u8 *ie, int ie_len, u16 reason, bool local_state_change) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_disassoc_request req = { .reason_code = reason, .local_state_change = local_state_change, .ie = ie, .ie_len = ie_len, }; int err; ASSERT_WDEV_LOCK(wdev); if (!wdev->current_bss) return -ENOTCONN; if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) req.bss = &wdev->current_bss->pub; else return -ENOTCONN; err = rdev_disassoc(rdev, dev, &req); if (err) return err; /* driver should have reported the disassoc */ WARN_ON(wdev->current_bss); return 0; }

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johannes bergjohannes berg14496.64%666.67%
jouni malinenjouni malinen32.01%111.11%
joe perchesjoe perches10.67%111.11%
hila gonenhila gonen10.67%111.11%
Total149100.00%9100.00%


void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, struct net_device *dev) { struct wireless_dev *wdev = dev->ieee80211_ptr; u8 bssid[ETH_ALEN]; ASSERT_WDEV_LOCK(wdev); if (!rdev->ops->deauth) return; if (!wdev->current_bss) return; memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN); cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, WLAN_REASON_DEAUTH_LEAVING, false); }

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johannes bergjohannes berg85100.00%5100.00%
Total85100.00%5100.00%

struct cfg80211_mgmt_registration { struct list_head list; struct wireless_dev *wdev; u32 nlportid; int match_len; __le16 frame_type; u8 match[]; };
static void cfg80211_process_mlme_unregistrations(struct cfg80211_registered_device *rdev) { struct cfg80211_mgmt_registration *reg; ASSERT_RTNL(); spin_lock_bh(&rdev->mlme_unreg_lock); while ((reg = list_first_entry_or_null(&rdev->mlme_unreg, struct cfg80211_mgmt_registration, list))) { list_del(&reg->list); spin_unlock_bh(&rdev->mlme_unreg_lock); if (rdev->ops->mgmt_frame_register) { u16 frame_type = le16_to_cpu(reg->frame_type); rdev_mgmt_frame_register(rdev, reg->wdev, frame_type, false); } kfree(reg); spin_lock_bh(&rdev->mlme_unreg_lock); } spin_unlock_bh(&rdev->mlme_unreg_lock); }

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johannes bergjohannes berg118100.00%1100.00%
Total118100.00%1100.00%


void cfg80211_mlme_unreg_wk(struct work_struct *wk) { struct cfg80211_registered_device *rdev; rdev = container_of(wk, struct cfg80211_registered_device, mlme_unreg_wk); rtnl_lock(); cfg80211_process_mlme_unregistrations(rdev); rtnl_unlock(); }

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johannes bergjohannes berg38100.00%1100.00%
Total38100.00%1100.00%


int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid, u16 frame_type, const u8 *match_data, int match_len) { struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); struct cfg80211_mgmt_registration *reg, *nreg; int err = 0; u16 mgmt_type; if (!wdev->wiphy->mgmt_stypes) return -EOPNOTSUPP; if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) return -EINVAL; if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) return -EINVAL; mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4; if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) return -EINVAL; nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL); if (!nreg) return -ENOMEM; spin_lock_bh(&wdev->mgmt_registrations_lock); list_for_each_entry(reg, &wdev->mgmt_registrations, list) { int mlen = min(match_len, reg->match_len); if (frame_type != le16_to_cpu(reg->frame_type)) continue; if (memcmp(reg->match, match_data, mlen) == 0) { err = -EALREADY; break; } } if (err) { kfree(nreg); goto out; } memcpy(nreg->match, match_data, match_len); nreg->match_len = match_len; nreg->nlportid = snd_portid; nreg->frame_type = cpu_to_le16(frame_type); nreg->wdev = wdev; list_add(&nreg->list, &wdev->mgmt_registrations); spin_unlock_bh(&wdev->mgmt_registrations_lock); /* process all unregistrations to avoid driver confusion */ cfg80211_process_mlme_unregistrations(rdev); if (rdev->ops->mgmt_frame_register) rdev_mgmt_frame_register(rdev, wdev, frame_type, true); return 0; out: spin_unlock_bh(&wdev->mgmt_registrations_lock); return err; }

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johannes bergjohannes berg27480.35%450.00%
jouni malinenjouni malinen5315.54%225.00%
beni levbeni lev133.81%112.50%
zhao gangzhao gang10.29%112.50%
Total341100.00%8100.00%


void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid) { struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); struct cfg80211_mgmt_registration *reg, *tmp; spin_lock_bh(&wdev->mgmt_registrations_lock); list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { if (reg->nlportid != nlportid) continue; list_del(&reg->list); spin_lock(&rdev->mlme_unreg_lock); list_add_tail(&reg->list, &rdev->mlme_unreg); spin_unlock(&rdev->mlme_unreg_lock); schedule_work(&rdev->mlme_unreg_wk); } spin_unlock_bh(&wdev->mgmt_registrations_lock); if (nlportid && rdev->crit_proto_nlportid == nlportid) { rdev->crit_proto_nlportid = 0; rdev_crit_proto_stop(rdev, wdev); } if (nlportid == wdev->ap_unexpected_nlportid) wdev->ap_unexpected_nlportid = 0; }

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johannes bergjohannes berg10062.11%228.57%
pandiyarajan pitchaimuthupandiyarajan pitchaimuthu3320.50%114.29%
arend van sprielarend van spriel2515.53%114.29%
jouni malinenjouni malinen10.62%114.29%
zhao gangzhao gang10.62%114.29%
eric w. biedermaneric w. biederman10.62%114.29%
Total161100.00%7100.00%


void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); spin_lock_bh(&wdev->mgmt_registrations_lock); spin_lock(&rdev->mlme_unreg_lock); list_splice_tail_init(&wdev->mgmt_registrations, &rdev->mlme_unreg); spin_unlock(&rdev->mlme_unreg_lock); spin_unlock_bh(&wdev->mgmt_registrations_lock); cfg80211_process_mlme_unregistrations(rdev); }

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johannes bergjohannes berg6286.11%266.67%
jouni malinenjouni malinen1013.89%133.33%
Total72100.00%3100.00%


int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev, struct cfg80211_mgmt_tx_params *params, u64 *cookie) { const struct ieee80211_mgmt *mgmt; u16 stype; if (!wdev->wiphy->mgmt_stypes) return -EOPNOTSUPP; if (!rdev->ops->mgmt_tx) return -EOPNOTSUPP; if (params->len < 24 + 1) return