589 lines
15 KiB
C
589 lines
15 KiB
C
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/* Copyright (C) 2006, Red Hat, Inc. */
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#include <linux/bitops.h>
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#include <net/ieee80211.h>
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#include "assoc.h"
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#include "join.h"
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#include "decl.h"
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#include "hostcmd.h"
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#include "host.h"
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static const u8 bssid_any[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
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static const u8 bssid_off[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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static int assoc_helper_essid(wlan_private *priv,
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struct assoc_request * assoc_req)
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{
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wlan_adapter *adapter = priv->adapter;
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int ret = 0;
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int i;
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ENTER();
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lbs_pr_debug(1, "New SSID requested: %s\n", assoc_req->ssid.ssid);
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if (assoc_req->mode == wlan802_11infrastructure) {
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if (adapter->prescan) {
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libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 1);
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}
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i = libertas_find_SSID_in_list(adapter, &assoc_req->ssid,
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NULL, wlan802_11infrastructure);
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if (i >= 0) {
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lbs_pr_debug(1,
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"SSID found in scan list ... associating...\n");
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ret = wlan_associate(priv, &adapter->scantable[i]);
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if (ret == 0) {
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memcpy(&assoc_req->bssid,
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&adapter->scantable[i].macaddress,
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ETH_ALEN);
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}
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} else {
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lbs_pr_debug(1, "SSID '%s' not found; cannot associate\n",
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assoc_req->ssid.ssid);
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}
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} else if (assoc_req->mode == wlan802_11ibss) {
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/* Scan for the network, do not save previous results. Stale
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* scan data will cause us to join a non-existant adhoc network
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*/
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libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 0);
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/* Search for the requested SSID in the scan table */
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i = libertas_find_SSID_in_list(adapter, &assoc_req->ssid, NULL,
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wlan802_11ibss);
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if (i >= 0) {
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lbs_pr_debug(1, "SSID found at %d in List, so join\n", ret);
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libertas_join_adhoc_network(priv, &adapter->scantable[i]);
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} else {
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/* else send START command */
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lbs_pr_debug(1, "SSID not found in list, so creating adhoc"
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" with SSID '%s'\n", assoc_req->ssid.ssid);
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libertas_start_adhoc_network(priv, &assoc_req->ssid);
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}
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memcpy(&assoc_req->bssid, &adapter->current_addr, ETH_ALEN);
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}
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LEAVE();
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return ret;
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}
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static int assoc_helper_bssid(wlan_private *priv,
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struct assoc_request * assoc_req)
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{
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wlan_adapter *adapter = priv->adapter;
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int i, ret = 0;
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ENTER();
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lbs_pr_debug(1, "ASSOC: WAP: BSSID = " MAC_FMT "\n",
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MAC_ARG(assoc_req->bssid));
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/* Search for index position in list for requested MAC */
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i = libertas_find_BSSID_in_list(adapter, assoc_req->bssid,
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assoc_req->mode);
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if (i < 0) {
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lbs_pr_debug(1, "ASSOC: WAP: BSSID " MAC_FMT " not found, "
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"cannot associate.\n", MAC_ARG(assoc_req->bssid));
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goto out;
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}
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if (assoc_req->mode == wlan802_11infrastructure) {
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ret = wlan_associate(priv, &adapter->scantable[i]);
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lbs_pr_debug(1, "ASSOC: return from wlan_associate(bssd) was %d\n", ret);
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} else if (assoc_req->mode == wlan802_11ibss) {
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libertas_join_adhoc_network(priv, &adapter->scantable[i]);
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}
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memcpy(&assoc_req->ssid, &adapter->scantable[i].ssid,
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sizeof(struct WLAN_802_11_SSID));
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out:
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LEAVE();
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return ret;
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}
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static int assoc_helper_associate(wlan_private *priv,
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struct assoc_request * assoc_req)
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{
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int ret = 0, done = 0;
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/* If we're given and 'any' BSSID, try associating based on SSID */
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if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
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if (memcmp(bssid_any, assoc_req->bssid, ETH_ALEN)
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&& memcmp(bssid_off, assoc_req->bssid, ETH_ALEN)) {
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ret = assoc_helper_bssid(priv, assoc_req);
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done = 1;
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if (ret) {
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lbs_pr_debug(1, "ASSOC: bssid: ret = %d\n", ret);
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}
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}
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}
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if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
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ret = assoc_helper_essid(priv, assoc_req);
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if (ret) {
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lbs_pr_debug(1, "ASSOC: bssid: ret = %d\n", ret);
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}
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}
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return ret;
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}
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static int assoc_helper_mode(wlan_private *priv,
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struct assoc_request * assoc_req)
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{
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wlan_adapter *adapter = priv->adapter;
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int ret = 0;
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ENTER();
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if (assoc_req->mode == adapter->inframode) {
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LEAVE();
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return 0;
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}
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if (assoc_req->mode == wlan802_11infrastructure) {
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if (adapter->psstate != PS_STATE_FULL_POWER)
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libertas_ps_wakeup(priv, cmd_option_waitforrsp);
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adapter->psmode = wlan802_11powermodecam;
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}
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adapter->inframode = assoc_req->mode;
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ret = libertas_prepare_and_send_command(priv,
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cmd_802_11_snmp_mib,
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0, cmd_option_waitforrsp,
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OID_802_11_INFRASTRUCTURE_MODE,
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(void *) assoc_req->mode);
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LEAVE();
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return ret;
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}
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static int assoc_helper_wep_keys(wlan_private *priv,
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struct assoc_request * assoc_req)
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{
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wlan_adapter *adapter = priv->adapter;
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int i;
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int ret = 0;
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ENTER();
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/* Set or remove WEP keys */
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if ( assoc_req->wep_keys[0].len
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|| assoc_req->wep_keys[1].len
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|| assoc_req->wep_keys[2].len
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|| assoc_req->wep_keys[3].len) {
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ret = libertas_prepare_and_send_command(priv,
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cmd_802_11_set_wep,
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cmd_act_add,
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cmd_option_waitforrsp,
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0, assoc_req);
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} else {
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ret = libertas_prepare_and_send_command(priv,
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cmd_802_11_set_wep,
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cmd_act_remove,
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cmd_option_waitforrsp,
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0, NULL);
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}
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if (ret)
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goto out;
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/* enable/disable the MAC's WEP packet filter */
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if (assoc_req->secinfo.WEPstatus == wlan802_11WEPenabled)
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adapter->currentpacketfilter |= cmd_act_mac_wep_enable;
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else
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adapter->currentpacketfilter &= ~cmd_act_mac_wep_enable;
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ret = libertas_set_mac_packet_filter(priv);
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if (ret)
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goto out;
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mutex_lock(&adapter->lock);
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/* Copy WEP keys into adapter wep key fields */
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for (i = 0; i < 4; i++) {
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memcpy(&adapter->wep_keys[i], &assoc_req->wep_keys[i],
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sizeof(struct WLAN_802_11_KEY));
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}
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adapter->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
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mutex_unlock(&adapter->lock);
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out:
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LEAVE();
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return ret;
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}
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static int assoc_helper_secinfo(wlan_private *priv,
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struct assoc_request * assoc_req)
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{
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wlan_adapter *adapter = priv->adapter;
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int ret = 0;
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ENTER();
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memcpy(&adapter->secinfo, &assoc_req->secinfo,
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sizeof(struct wlan_802_11_security));
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ret = libertas_set_mac_packet_filter(priv);
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LEAVE();
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return ret;
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}
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static int assoc_helper_wpa_keys(wlan_private *priv,
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struct assoc_request * assoc_req)
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{
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int ret = 0;
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ENTER();
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/* enable/Disable RSN */
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ret = libertas_prepare_and_send_command(priv,
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cmd_802_11_enable_rsn,
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cmd_act_set,
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cmd_option_waitforrsp,
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0, assoc_req);
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if (ret)
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goto out;
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ret = libertas_prepare_and_send_command(priv,
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cmd_802_11_key_material,
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cmd_act_set,
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cmd_option_waitforrsp,
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0, assoc_req);
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out:
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LEAVE();
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return ret;
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}
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static int assoc_helper_wpa_ie(wlan_private *priv,
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struct assoc_request * assoc_req)
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{
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wlan_adapter *adapter = priv->adapter;
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int ret = 0;
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ENTER();
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if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
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memcpy(&adapter->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
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adapter->wpa_ie_len = assoc_req->wpa_ie_len;
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} else {
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memset(&adapter->wpa_ie, 0, MAX_WPA_IE_LEN);
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adapter->wpa_ie_len = 0;
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}
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LEAVE();
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return ret;
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}
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static int should_deauth_infrastructure(wlan_adapter *adapter,
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struct assoc_request * assoc_req)
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{
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if (adapter->connect_status != libertas_connected)
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return 0;
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if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
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lbs_pr_debug(1, "Deauthenticating due to new SSID in "
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" configuration request.\n");
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return 1;
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}
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if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
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if (adapter->secinfo.authmode !=
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assoc_req->secinfo.authmode) {
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lbs_pr_debug(1, "Deauthenticating due to updated security "
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"info in configuration request.\n");
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return 1;
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}
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}
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if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
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lbs_pr_debug(1, "Deauthenticating due to new BSSID in "
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" configuration request.\n");
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return 1;
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}
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/* FIXME: deal with 'auto' mode somehow */
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if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
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if (assoc_req->mode != wlan802_11infrastructure)
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return 1;
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}
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return 0;
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}
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static int should_stop_adhoc(wlan_adapter *adapter,
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struct assoc_request * assoc_req)
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{
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if (adapter->connect_status != libertas_connected)
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return 0;
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if (adapter->curbssparams.ssid.ssidlength != assoc_req->ssid.ssidlength)
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return 1;
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if (memcmp(adapter->curbssparams.ssid.ssid, assoc_req->ssid.ssid,
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sizeof(struct WLAN_802_11_SSID)))
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return 1;
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/* FIXME: deal with 'auto' mode somehow */
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if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
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if (assoc_req->mode != wlan802_11ibss)
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return 1;
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}
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return 0;
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}
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void wlan_association_worker(struct work_struct *work)
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{
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wlan_private *priv = container_of(work, wlan_private, assoc_work.work);
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wlan_adapter *adapter = priv->adapter;
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struct assoc_request * assoc_req = NULL;
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int ret = 0;
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int find_any_ssid = 0;
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ENTER();
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mutex_lock(&adapter->lock);
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assoc_req = adapter->assoc_req;
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adapter->assoc_req = NULL;
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mutex_unlock(&adapter->lock);
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if (!assoc_req) {
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LEAVE();
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return;
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}
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lbs_pr_debug(1, "ASSOC: starting new association request: flags = 0x%lX\n",
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assoc_req->flags);
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/* If 'any' SSID was specified, find an SSID to associate with */
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if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
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|
|
&& !assoc_req->ssid.ssidlength)
|
||
|
|
find_any_ssid = 1;
|
||
|
|
|
||
|
|
/* But don't use 'any' SSID if there's a valid locked BSSID to use */
|
||
|
|
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
|
||
|
|
if (memcmp(&assoc_req->bssid, bssid_any, ETH_ALEN)
|
||
|
|
&& memcmp(&assoc_req->bssid, bssid_off, ETH_ALEN))
|
||
|
|
find_any_ssid = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (find_any_ssid) {
|
||
|
|
enum WLAN_802_11_NETWORK_INFRASTRUCTURE new_mode;
|
||
|
|
|
||
|
|
ret = libertas_find_best_network_SSID(priv, &assoc_req->ssid,
|
||
|
|
assoc_req->mode, &new_mode);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "Could not find best network\n");
|
||
|
|
ret = -ENETUNREACH;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Ensure we switch to the mode of the AP */
|
||
|
|
if (assoc_req->mode == wlan802_11autounknown) {
|
||
|
|
set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
|
||
|
|
assoc_req->mode = new_mode;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check if the attributes being changing require deauthentication
|
||
|
|
* from the currently associated infrastructure access point.
|
||
|
|
*/
|
||
|
|
if (adapter->inframode == wlan802_11infrastructure) {
|
||
|
|
if (should_deauth_infrastructure(adapter, assoc_req)) {
|
||
|
|
ret = libertas_send_deauthentication(priv);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "Deauthentication due to new "
|
||
|
|
"configuration request failed: %d\n",
|
||
|
|
ret);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else if (adapter->inframode == wlan802_11ibss) {
|
||
|
|
if (should_stop_adhoc(adapter, assoc_req)) {
|
||
|
|
ret = libertas_stop_adhoc_network(priv);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "Teardown of AdHoc network due to "
|
||
|
|
"new configuration request failed: %d\n",
|
||
|
|
ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Send the various configuration bits to the firmware */
|
||
|
|
if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
|
||
|
|
ret = assoc_helper_mode(priv, assoc_req);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "ASSOC(:%d) mode: ret = %d\n", __LINE__, ret);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
|
||
|
|
|| test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
|
||
|
|
ret = assoc_helper_wep_keys(priv, assoc_req);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "ASSOC(:%d) wep_keys: ret = %d\n", __LINE__, ret);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
|
||
|
|
ret = assoc_helper_secinfo(priv, assoc_req);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "ASSOC(:%d) secinfo: ret = %d\n", __LINE__, ret);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
|
||
|
|
ret = assoc_helper_wpa_ie(priv, assoc_req);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "ASSOC(:%d) wpa_ie: ret = %d\n", __LINE__, ret);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)
|
||
|
|
|| test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
|
||
|
|
ret = assoc_helper_wpa_keys(priv, assoc_req);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "ASSOC(:%d) wpa_keys: ret = %d\n", __LINE__, ret);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* SSID/BSSID should be the _last_ config option set, because they
|
||
|
|
* trigger the association attempt.
|
||
|
|
*/
|
||
|
|
if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
|
||
|
|
|| test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
|
||
|
|
int success = 1;
|
||
|
|
|
||
|
|
ret = assoc_helper_associate(priv, assoc_req);
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "ASSOC: association attempt unsuccessful: %d\n",
|
||
|
|
ret);
|
||
|
|
success = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (adapter->connect_status != libertas_connected) {
|
||
|
|
lbs_pr_debug(1, "ASSOC: assoication attempt unsuccessful, "
|
||
|
|
"not connected.\n");
|
||
|
|
success = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (success) {
|
||
|
|
lbs_pr_debug(1, "ASSOC: association attempt successful. "
|
||
|
|
"Associated to '%s' (" MAC_FMT ")\n",
|
||
|
|
assoc_req->ssid.ssid, MAC_ARG(assoc_req->bssid));
|
||
|
|
libertas_prepare_and_send_command(priv,
|
||
|
|
cmd_802_11_rssi,
|
||
|
|
0, cmd_option_waitforrsp, 0, NULL);
|
||
|
|
|
||
|
|
libertas_prepare_and_send_command(priv,
|
||
|
|
cmd_802_11_get_log,
|
||
|
|
0, cmd_option_waitforrsp, 0, NULL);
|
||
|
|
} else {
|
||
|
|
|
||
|
|
ret = -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
out:
|
||
|
|
if (ret) {
|
||
|
|
lbs_pr_debug(1, "ASSOC: reconfiguration attempt unsuccessful: %d\n",
|
||
|
|
ret);
|
||
|
|
}
|
||
|
|
kfree(assoc_req);
|
||
|
|
LEAVE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Caller MUST hold any necessary locks
|
||
|
|
*/
|
||
|
|
struct assoc_request * wlan_get_association_request(wlan_adapter *adapter)
|
||
|
|
{
|
||
|
|
struct assoc_request * assoc_req;
|
||
|
|
|
||
|
|
if (!adapter->assoc_req) {
|
||
|
|
adapter->assoc_req = kzalloc(sizeof(struct assoc_request), GFP_KERNEL);
|
||
|
|
if (!adapter->assoc_req) {
|
||
|
|
lbs_pr_info("Not enough memory to allocate association"
|
||
|
|
" request!\n");
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Copy current configuration attributes to the association request,
|
||
|
|
* but don't overwrite any that are already set.
|
||
|
|
*/
|
||
|
|
assoc_req = adapter->assoc_req;
|
||
|
|
if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
|
||
|
|
memcpy(&assoc_req->ssid, adapter->curbssparams.ssid.ssid,
|
||
|
|
adapter->curbssparams.ssid.ssidlength);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
|
||
|
|
assoc_req->channel = adapter->curbssparams.channel;
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
|
||
|
|
assoc_req->mode = adapter->inframode;
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
|
||
|
|
memcpy(&assoc_req->bssid, adapter->curbssparams.bssid,
|
||
|
|
ETH_ALEN);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < 4; i++) {
|
||
|
|
memcpy(&assoc_req->wep_keys[i], &adapter->wep_keys[i],
|
||
|
|
sizeof(struct WLAN_802_11_KEY));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
|
||
|
|
assoc_req->wep_tx_keyidx = adapter->wep_tx_keyidx;
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
|
||
|
|
memcpy(&assoc_req->wpa_mcast_key, &adapter->wpa_mcast_key,
|
||
|
|
sizeof(struct WLAN_802_11_KEY));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
|
||
|
|
memcpy(&assoc_req->wpa_unicast_key, &adapter->wpa_unicast_key,
|
||
|
|
sizeof(struct WLAN_802_11_KEY));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
|
||
|
|
memcpy(&assoc_req->secinfo, &adapter->secinfo,
|
||
|
|
sizeof(struct wlan_802_11_security));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
|
||
|
|
memcpy(&assoc_req->wpa_ie, &adapter->wpa_ie,
|
||
|
|
MAX_WPA_IE_LEN);
|
||
|
|
assoc_req->wpa_ie_len = adapter->wpa_ie_len;
|
||
|
|
}
|
||
|
|
|
||
|
|
return assoc_req;
|
||
|
|
}
|
||
|
|
|
||
|
|
|