![Johannes Berg](/assets/img/avatar_default.png)
This adds code to cfg80211 so that drivers (mac80211 right now) that don't implement connect but rather auth/assoc can still be used with the nl80211 connect command. This will also be necessary for the wext compat code. Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
594 lines
16 KiB
C
594 lines
16 KiB
C
/*
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* SME code for cfg80211's connect emulation.
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*
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* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
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* Copyright (C) 2009 Intel Corporation. All rights reserved.
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*/
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/workqueue.h>
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#include <net/cfg80211.h>
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#include <net/rtnetlink.h>
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#include "nl80211.h"
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struct cfg80211_conn {
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struct cfg80211_connect_params params;
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/* these are sub-states of the _CONNECTING sme_state */
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enum {
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CFG80211_CONN_IDLE,
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CFG80211_CONN_SCANNING,
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CFG80211_CONN_SCAN_AGAIN,
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CFG80211_CONN_AUTHENTICATE_NEXT,
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CFG80211_CONN_AUTHENTICATING,
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CFG80211_CONN_ASSOCIATE_NEXT,
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CFG80211_CONN_ASSOCIATING,
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} state;
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u8 bssid[ETH_ALEN];
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u8 *ie;
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size_t ie_len;
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bool auto_auth;
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};
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static int cfg80211_conn_scan(struct wireless_dev *wdev)
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{
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struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
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struct cfg80211_scan_request *request;
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int n_channels, err;
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ASSERT_RTNL();
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if (drv->scan_req)
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return -EBUSY;
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if (wdev->conn->params.channel) {
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n_channels = 1;
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} else {
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enum ieee80211_band band;
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n_channels = 0;
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for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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if (!wdev->wiphy->bands[band])
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continue;
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n_channels += wdev->wiphy->bands[band]->n_channels;
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}
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}
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request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
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sizeof(request->channels[0]) * n_channels,
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GFP_KERNEL);
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if (!request)
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return -ENOMEM;
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request->channels = (void *)((char *)request + sizeof(*request));
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if (wdev->conn->params.channel)
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request->channels[0] = wdev->conn->params.channel;
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else {
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int i = 0, j;
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enum ieee80211_band band;
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for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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if (!wdev->wiphy->bands[band])
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continue;
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for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
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i++, j++)
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request->channels[i] =
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&wdev->wiphy->bands[band]->channels[j];
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}
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}
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request->n_channels = n_channels;
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request->ssids = (void *)(request->channels + n_channels);
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request->n_ssids = 1;
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memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
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wdev->conn->params.ssid_len);
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request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
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request->ifidx = wdev->netdev->ifindex;
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request->wiphy = &drv->wiphy;
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drv->scan_req = request;
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err = drv->ops->scan(wdev->wiphy, wdev->netdev, request);
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if (!err) {
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wdev->conn->state = CFG80211_CONN_SCANNING;
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nl80211_send_scan_start(drv, wdev->netdev);
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} else {
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drv->scan_req = NULL;
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kfree(request);
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}
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return err;
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}
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static int cfg80211_conn_do_work(struct wireless_dev *wdev)
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{
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struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
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union {
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struct cfg80211_auth_request auth_req;
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struct cfg80211_assoc_request assoc_req;
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} u;
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memset(&u, 0, sizeof(u));
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if (!wdev->conn)
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return 0;
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switch (wdev->conn->state) {
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case CFG80211_CONN_SCAN_AGAIN:
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return cfg80211_conn_scan(wdev);
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case CFG80211_CONN_AUTHENTICATE_NEXT:
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u.auth_req.chan = wdev->conn->params.channel;
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u.auth_req.peer_addr = wdev->conn->params.bssid;
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u.auth_req.ssid = wdev->conn->params.ssid;
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u.auth_req.ssid_len = wdev->conn->params.ssid_len;
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u.auth_req.auth_type = wdev->conn->params.auth_type;
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u.auth_req.ie = NULL;
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u.auth_req.ie_len = 0;
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wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
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BUG_ON(!drv->ops->auth);
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return drv->ops->auth(wdev->wiphy, wdev->netdev, &u.auth_req);
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case CFG80211_CONN_ASSOCIATE_NEXT:
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u.assoc_req.chan = wdev->conn->params.channel;
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u.assoc_req.peer_addr = wdev->conn->params.bssid;
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u.assoc_req.ssid = wdev->conn->params.ssid;
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u.assoc_req.ssid_len = wdev->conn->params.ssid_len;
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u.assoc_req.ie = wdev->conn->params.ie;
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u.assoc_req.ie_len = wdev->conn->params.ie_len;
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u.assoc_req.use_mfp = false;
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memcpy(&u.assoc_req.crypto, &wdev->conn->params.crypto,
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sizeof(u.assoc_req.crypto));
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wdev->conn->state = CFG80211_CONN_ASSOCIATING;
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BUG_ON(!drv->ops->assoc);
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return drv->ops->assoc(wdev->wiphy, wdev->netdev,
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&u.assoc_req);
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default:
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return 0;
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}
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}
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void cfg80211_conn_work(struct work_struct *work)
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{
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struct cfg80211_registered_device *drv =
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container_of(work, struct cfg80211_registered_device, conn_work);
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struct wireless_dev *wdev;
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rtnl_lock();
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mutex_lock(&drv->devlist_mtx);
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list_for_each_entry(wdev, &drv->netdev_list, list) {
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if (!netif_running(wdev->netdev))
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continue;
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if (wdev->sme_state != CFG80211_SME_CONNECTING)
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continue;
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if (cfg80211_conn_do_work(wdev))
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cfg80211_connect_result(wdev->netdev,
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wdev->conn->params.bssid,
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NULL, 0, NULL, 0,
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WLAN_STATUS_UNSPECIFIED_FAILURE,
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GFP_ATOMIC);
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}
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mutex_unlock(&drv->devlist_mtx);
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rtnl_unlock();
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}
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static bool cfg80211_get_conn_bss(struct wireless_dev *wdev)
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{
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struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
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struct cfg80211_bss *bss;
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u16 capa = WLAN_CAPABILITY_ESS;
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if (wdev->conn->params.privacy)
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capa |= WLAN_CAPABILITY_PRIVACY;
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bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
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wdev->conn->params.ssid,
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wdev->conn->params.ssid_len,
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WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
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capa);
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if (!bss)
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return false;
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memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
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wdev->conn->params.bssid = wdev->conn->bssid;
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wdev->conn->params.channel = bss->channel;
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wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
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schedule_work(&drv->conn_work);
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cfg80211_put_bss(bss);
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return true;
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}
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void cfg80211_sme_scan_done(struct net_device *dev)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
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if (wdev->sme_state != CFG80211_SME_CONNECTING)
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return;
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if (WARN_ON(!wdev->conn))
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return;
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if (wdev->conn->state != CFG80211_CONN_SCANNING &&
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wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
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return;
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if (!cfg80211_get_conn_bss(wdev)) {
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/* not found */
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if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
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schedule_work(&drv->conn_work);
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else
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cfg80211_connect_result(dev, wdev->conn->params.bssid,
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NULL, 0, NULL, 0,
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WLAN_STATUS_UNSPECIFIED_FAILURE,
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GFP_ATOMIC);
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return;
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}
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}
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void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
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u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
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/* should only RX auth frames when connecting */
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if (wdev->sme_state != CFG80211_SME_CONNECTING)
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return;
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if (WARN_ON(!wdev->conn))
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return;
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if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
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wdev->conn->auto_auth &&
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wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
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/* select automatically between only open, shared, leap */
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switch (wdev->conn->params.auth_type) {
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case NL80211_AUTHTYPE_OPEN_SYSTEM:
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wdev->conn->params.auth_type =
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NL80211_AUTHTYPE_SHARED_KEY;
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break;
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case NL80211_AUTHTYPE_SHARED_KEY:
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wdev->conn->params.auth_type =
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NL80211_AUTHTYPE_NETWORK_EAP;
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break;
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default:
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/* huh? */
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wdev->conn->params.auth_type =
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NL80211_AUTHTYPE_OPEN_SYSTEM;
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break;
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}
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wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
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schedule_work(&rdev->conn_work);
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} else if (status_code != WLAN_STATUS_SUCCESS)
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wdev->sme_state = CFG80211_SME_IDLE;
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else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
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wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
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wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
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schedule_work(&rdev->conn_work);
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}
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}
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void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
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const u8 *req_ie, size_t req_ie_len,
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const u8 *resp_ie, size_t resp_ie_len,
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u16 status, gfp_t gfp)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_bss *bss;
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#ifdef CONFIG_WIRELESS_EXT
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union iwreq_data wrqu;
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#endif
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return;
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if (wdev->sme_state != CFG80211_SME_CONNECTING)
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return;
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if (wdev->current_bss) {
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cfg80211_unhold_bss(wdev->current_bss);
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cfg80211_put_bss(wdev->current_bss);
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wdev->current_bss = NULL;
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}
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if (status == WLAN_STATUS_SUCCESS) {
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bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
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wdev->ssid, wdev->ssid_len,
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WLAN_CAPABILITY_ESS,
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WLAN_CAPABILITY_ESS);
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if (WARN_ON(!bss))
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return;
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cfg80211_hold_bss(bss);
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wdev->current_bss = bss;
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wdev->sme_state = CFG80211_SME_CONNECTED;
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} else {
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wdev->sme_state = CFG80211_SME_IDLE;
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}
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if (wdev->conn)
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wdev->conn->state = CFG80211_CONN_IDLE;
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nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, bssid,
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req_ie, req_ie_len, resp_ie, resp_ie_len,
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status, gfp);
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#ifdef CONFIG_WIRELESS_EXT
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if (req_ie && status == WLAN_STATUS_SUCCESS) {
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.data.length = req_ie_len;
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wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
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}
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if (resp_ie && status == WLAN_STATUS_SUCCESS) {
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.data.length = resp_ie_len;
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wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
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}
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.ap_addr.sa_family = ARPHRD_ETHER;
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if (bssid && status == WLAN_STATUS_SUCCESS)
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memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
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wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
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#endif
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}
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EXPORT_SYMBOL(cfg80211_connect_result);
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void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
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const u8 *req_ie, size_t req_ie_len,
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const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_bss *bss;
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#ifdef CONFIG_WIRELESS_EXT
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union iwreq_data wrqu;
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#endif
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return;
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if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
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return;
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/* internal error -- how did we get to CONNECTED w/o BSS? */
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if (WARN_ON(!wdev->current_bss)) {
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return;
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}
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cfg80211_unhold_bss(wdev->current_bss);
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cfg80211_put_bss(wdev->current_bss);
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wdev->current_bss = NULL;
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bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
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wdev->ssid, wdev->ssid_len,
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WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
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if (WARN_ON(!bss))
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return;
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cfg80211_hold_bss(bss);
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wdev->current_bss = bss;
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nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev, bssid,
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req_ie, req_ie_len, resp_ie, resp_ie_len, gfp);
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#ifdef CONFIG_WIRELESS_EXT
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if (req_ie) {
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.data.length = req_ie_len;
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wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
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}
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if (resp_ie) {
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.data.length = resp_ie_len;
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wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
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}
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.ap_addr.sa_family = ARPHRD_ETHER;
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memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
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wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
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#endif
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}
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EXPORT_SYMBOL(cfg80211_roamed);
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void __cfg80211_disconnected(struct net_device *dev, gfp_t gfp, u8 *ie,
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size_t ie_len, u16 reason, bool from_ap)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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#ifdef CONFIG_WIRELESS_EXT
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union iwreq_data wrqu;
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#endif
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return;
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if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
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return;
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if (wdev->current_bss) {
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cfg80211_unhold_bss(wdev->current_bss);
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cfg80211_put_bss(wdev->current_bss);
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}
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wdev->current_bss = NULL;
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wdev->sme_state = CFG80211_SME_IDLE;
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if (wdev->conn) {
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kfree(wdev->conn->ie);
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wdev->conn->ie = NULL;
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}
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nl80211_send_disconnected(wiphy_to_dev(wdev->wiphy), dev,
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reason, ie, ie_len, from_ap, gfp);
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#ifdef CONFIG_WIRELESS_EXT
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.ap_addr.sa_family = ARPHRD_ETHER;
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wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
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#endif
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}
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void cfg80211_disconnected(struct net_device *dev, u16 reason,
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u8 *ie, size_t ie_len, gfp_t gfp)
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{
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__cfg80211_disconnected(dev, gfp, ie, ie_len, reason, true);
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}
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EXPORT_SYMBOL(cfg80211_disconnected);
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int cfg80211_connect(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_connect_params *connect)
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{
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int err;
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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if (wdev->sme_state != CFG80211_SME_IDLE)
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return -EALREADY;
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if (!rdev->ops->connect) {
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if (!rdev->ops->auth || !rdev->ops->assoc)
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return -EOPNOTSUPP;
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if (!wdev->conn) {
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wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
|
|
if (!wdev->conn)
|
|
return -ENOMEM;
|
|
} else
|
|
memset(wdev->conn, 0, sizeof(*wdev->conn));
|
|
|
|
/*
|
|
* Copy all parameters, and treat explicitly IEs, BSSID, SSID.
|
|
*/
|
|
memcpy(&wdev->conn->params, connect, sizeof(*connect));
|
|
if (connect->bssid) {
|
|
wdev->conn->params.bssid = wdev->conn->bssid;
|
|
memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
|
|
}
|
|
|
|
if (connect->ie) {
|
|
wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
|
|
GFP_KERNEL);
|
|
wdev->conn->params.ie = wdev->conn->ie;
|
|
if (!wdev->conn->ie)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
|
|
wdev->conn->auto_auth = true;
|
|
/* start with open system ... should mostly work */
|
|
wdev->conn->params.auth_type =
|
|
NL80211_AUTHTYPE_OPEN_SYSTEM;
|
|
} else {
|
|
wdev->conn->auto_auth = false;
|
|
}
|
|
|
|
memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
|
|
wdev->ssid_len = connect->ssid_len;
|
|
wdev->conn->params.ssid = wdev->ssid;
|
|
wdev->conn->params.ssid_len = connect->ssid_len;
|
|
|
|
/* don't care about result -- but fill bssid & channel */
|
|
if (!wdev->conn->params.bssid || !wdev->conn->params.channel)
|
|
cfg80211_get_conn_bss(wdev);
|
|
|
|
wdev->sme_state = CFG80211_SME_CONNECTING;
|
|
|
|
/* we're good if we have both BSSID and channel */
|
|
if (wdev->conn->params.bssid && wdev->conn->params.channel) {
|
|
wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
|
|
err = cfg80211_conn_do_work(wdev);
|
|
} else {
|
|
/* otherwise we'll need to scan for the AP first */
|
|
err = cfg80211_conn_scan(wdev);
|
|
/*
|
|
* If we can't scan right now, then we need to scan again
|
|
* after the current scan finished, since the parameters
|
|
* changed (unless we find a good AP anyway).
|
|
*/
|
|
if (err == -EBUSY) {
|
|
err = 0;
|
|
wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
|
|
}
|
|
}
|
|
if (err)
|
|
wdev->sme_state = CFG80211_SME_IDLE;
|
|
|
|
return err;
|
|
} else {
|
|
wdev->sme_state = CFG80211_SME_CONNECTING;
|
|
err = rdev->ops->connect(&rdev->wiphy, dev, connect);
|
|
if (err) {
|
|
wdev->sme_state = CFG80211_SME_IDLE;
|
|
return err;
|
|
}
|
|
|
|
memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
|
|
wdev->ssid_len = connect->ssid_len;
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev, u16 reason)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
if (wdev->sme_state == CFG80211_SME_IDLE)
|
|
return -EINVAL;
|
|
|
|
if (!rdev->ops->disconnect) {
|
|
struct cfg80211_deauth_request deauth;
|
|
u8 bssid[ETH_ALEN];
|
|
|
|
/* internal bug. */
|
|
if (WARN_ON(!wdev->conn))
|
|
return -EINVAL;
|
|
|
|
if (wdev->sme_state == CFG80211_SME_CONNECTING &&
|
|
(wdev->conn->state == CFG80211_CONN_SCANNING ||
|
|
wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
|
|
wdev->sme_state = CFG80211_SME_IDLE;
|
|
return 0;
|
|
}
|
|
|
|
if (!rdev->ops->deauth)
|
|
return -EOPNOTSUPP;
|
|
|
|
memset(&deauth, 0, sizeof(deauth));
|
|
|
|
/* wdev->conn->params.bssid must be set if > SCANNING */
|
|
memcpy(bssid, wdev->conn->params.bssid, ETH_ALEN);
|
|
deauth.peer_addr = bssid;
|
|
deauth.reason_code = reason;
|
|
|
|
err = rdev->ops->deauth(&rdev->wiphy, dev, &deauth);
|
|
if (err)
|
|
return err;
|
|
} else {
|
|
err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (wdev->sme_state == CFG80211_SME_CONNECTED)
|
|
__cfg80211_disconnected(dev, GFP_KERNEL, NULL, 0, 0, false);
|
|
else if (wdev->sme_state == CFG80211_SME_CONNECTING)
|
|
cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
|
|
WLAN_STATUS_UNSPECIFIED_FAILURE,
|
|
GFP_KERNEL);
|
|
|
|
return 0;
|
|
}
|