[PATCH] wireless: Add softmac layer to the kernel
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/ieee80211/softmac/ieee80211softmac_auth.c b/net/ieee80211/softmac/ieee80211softmac_auth.c
new file mode 100644
index 0000000..94cac14
--- /dev/null
+++ b/net/ieee80211/softmac/ieee80211softmac_auth.c
@@ -0,0 +1,348 @@
+#include "ieee80211softmac_priv.h"
+
+static void ieee80211softmac_auth_queue(void *data);
+
+/* Queues an auth request to the desired AP */
+int
+ieee80211softmac_auth_req(struct ieee80211softmac_device *mac,
+ struct ieee80211softmac_network *net)
+{
+ struct ieee80211softmac_auth_queue_item *auth;
+ unsigned long flags;
+
+ function_enter();
+
+ if (net->authenticating)
+ return 0;
+
+ /* Add the network if it's not already added */
+ ieee80211softmac_add_network(mac, net);
+
+ dprintk(KERN_NOTICE PFX "Queueing Authentication Request to "MAC_FMT"\n", MAC_ARG(net->bssid));
+ /* Queue the auth request */
+ auth = (struct ieee80211softmac_auth_queue_item *)
+ kmalloc(sizeof(struct ieee80211softmac_auth_queue_item), GFP_KERNEL);
+ if(auth == NULL)
+ return -ENOMEM;
+
+ auth->net = net;
+ auth->mac = mac;
+ auth->retry = IEEE80211SOFTMAC_AUTH_RETRY_LIMIT;
+ auth->state = IEEE80211SOFTMAC_AUTH_OPEN_REQUEST;
+ INIT_WORK(&auth->work, &ieee80211softmac_auth_queue, (void *)auth);
+
+ /* Lock (for list) */
+ spin_lock_irqsave(&mac->lock, flags);
+
+ /* add to list */
+ list_add_tail(&auth->list, &mac->auth_queue);
+ queue_work(mac->workqueue, &auth->work);
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ return 0;
+}
+
+
+/* Sends an auth request to the desired AP and handles timeouts */
+static void
+ieee80211softmac_auth_queue(void *data)
+{
+ struct ieee80211softmac_device *mac;
+ struct ieee80211softmac_auth_queue_item *auth;
+ struct ieee80211softmac_network *net;
+ unsigned long flags;
+
+ function_enter();
+
+ auth = (struct ieee80211softmac_auth_queue_item *)data;
+ net = auth->net;
+ mac = auth->mac;
+
+ if(auth->retry > 0) {
+ /* Switch to correct channel for this network */
+ mac->set_channel(mac->dev, net->channel);
+
+ /* Lock and set flags */
+ spin_lock_irqsave(&mac->lock, flags);
+ net->authenticated = 0;
+ net->authenticating = 1;
+ /* add a timeout call so we eventually give up waiting for an auth reply */
+ queue_delayed_work(mac->workqueue, &auth->work, IEEE80211SOFTMAC_AUTH_TIMEOUT);
+ auth->retry--;
+ spin_unlock_irqrestore(&mac->lock, flags);
+ if (ieee80211softmac_send_mgt_frame(mac, auth->net, IEEE80211_STYPE_AUTH, auth->state))
+ dprintk(KERN_NOTICE PFX "Sending Authentication Request to "MAC_FMT" failed (this shouldn't happen, wait for the timeout).\n", MAC_ARG(net->bssid));
+ else
+ dprintk(KERN_NOTICE PFX "Sent Authentication Request to "MAC_FMT".\n", MAC_ARG(net->bssid));
+ return;
+ }
+
+ printkl(KERN_WARNING PFX "Authentication timed out with "MAC_FMT"\n", MAC_ARG(net->bssid));
+ /* Remove this item from the queue */
+ spin_lock_irqsave(&mac->lock, flags);
+ ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT, net);
+ cancel_delayed_work(&auth->work); /* just to make sure... */
+ list_del(&auth->list);
+ spin_unlock_irqrestore(&mac->lock, flags);
+ /* Free it */
+ kfree(auth);
+}
+
+/* Handle the auth response from the AP
+ * This should be registered with ieee80211 as handle_auth
+ */
+int
+ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth)
+{
+
+ struct list_head *list_ptr;
+ struct ieee80211softmac_device *mac = ieee80211_priv(dev);
+ struct ieee80211softmac_auth_queue_item *aq = NULL;
+ struct ieee80211softmac_network *net = NULL;
+ unsigned long flags;
+ u8 * data;
+
+ function_enter();
+
+ /* Find correct auth queue item */
+ spin_lock_irqsave(&mac->lock, flags);
+ list_for_each(list_ptr, &mac->auth_queue) {
+ aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
+ net = aq->net;
+ if (!memcmp(net->bssid, auth->header.addr2, ETH_ALEN))
+ break;
+ else
+ aq = NULL;
+ }
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ /* Make sure that we've got an auth queue item for this request */
+ if(aq == NULL)
+ {
+ printkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but no queue item exists.\n", MAC_ARG(auth->header.addr2));
+ /* Error #? */
+ return -1;
+ }
+
+ /* Check for out of order authentication */
+ if(!net->authenticating)
+ {
+ printkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but did not request authentication.\n",MAC_ARG(auth->header.addr2));
+ return -1;
+ }
+
+ /* Parse the auth packet */
+ switch(auth->algorithm) {
+ case WLAN_AUTH_OPEN:
+ /* Check the status code of the response */
+
+ switch(auth->status) {
+ case WLAN_STATUS_SUCCESS:
+ /* Update the status to Authenticated */
+ spin_lock_irqsave(&mac->lock, flags);
+ net->authenticating = 0;
+ net->authenticated = 1;
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ /* Send event */
+ printkl(KERN_NOTICE PFX "Open Authentication completed with "MAC_FMT"\n", MAC_ARG(net->bssid));
+ ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_AUTHENTICATED, net);
+ break;
+ default:
+ /* Lock and reset flags */
+ spin_lock_irqsave(&mac->lock, flags);
+ net->authenticated = 0;
+ net->authenticating = 0;
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ printkl(KERN_NOTICE PFX "Open Authentication with "MAC_FMT" failed, error code: %i\n",
+ MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
+ /* Count the error? */
+ break;
+ }
+ goto free_aq;
+ break;
+ case WLAN_AUTH_SHARED_KEY:
+ /* Figure out where we are in the process */
+ switch(auth->transaction) {
+ case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE:
+ /* Check to make sure we have a challenge IE */
+ data = (u8 *)auth->info_element;
+ if(*data++ != MFIE_TYPE_CHALLENGE){
+ printkl(KERN_NOTICE PFX "Shared Key Authentication failed due to a missing challenge.\n");
+ break;
+ }
+ /* Save the challenge */
+ spin_lock_irqsave(&mac->lock, flags);
+ net->challenge_len = *data++;
+ if(net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
+ net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
+ if(net->challenge != NULL)
+ kfree(net->challenge);
+ net->challenge = kmalloc(net->challenge_len, GFP_ATOMIC);
+ memcpy(net->challenge, data, net->challenge_len);
+ aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE;
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ /* Switch to correct channel for this network */
+ mac->set_channel(mac->dev, net->channel);
+
+ /* Send our response (How to encrypt?) */
+ ieee80211softmac_send_mgt_frame(mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
+ break;
+ case IEEE80211SOFTMAC_AUTH_SHARED_PASS:
+ /* Check the status code of the response */
+ switch(auth->status) {
+ case WLAN_STATUS_SUCCESS:
+ /* Update the status to Authenticated */
+ spin_lock_irqsave(&mac->lock, flags);
+ net->authenticating = 0;
+ net->authenticated = 1;
+ spin_unlock_irqrestore(&mac->lock, flags);
+ printkl(KERN_NOTICE PFX "Shared Key Authentication completed with "MAC_FMT"\n",
+ MAC_ARG(net->bssid));
+ break;
+ default:
+ printkl(KERN_NOTICE PFX "Shared Key Authentication with "MAC_FMT" failed, error code: %i\n",
+ MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
+ /* Lock and reset flags */
+ spin_lock_irqsave(&mac->lock, flags);
+ net->authenticating = 0;
+ net->authenticated = 0;
+ spin_unlock_irqrestore(&mac->lock, flags);
+ /* Count the error? */
+ break;
+ }
+ goto free_aq;
+ break;
+ default:
+ printkl(KERN_WARNING PFX "Unhandled Authentication Step: %i\n", auth->transaction);
+ break;
+ }
+ goto free_aq;
+ break;
+ default:
+ /* ERROR */
+ goto free_aq;
+ break;
+ }
+ return 0;
+free_aq:
+ /* Cancel the timeout */
+ spin_lock_irqsave(&mac->lock, flags);
+ cancel_delayed_work(&aq->work);
+ /* Remove this item from the queue */
+ list_del(&aq->list);
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ /* Free it */
+ kfree(aq);
+ return 0;
+}
+
+/*
+ * Handle deauthorization
+ */
+void
+ieee80211softmac_deauth_from_net(struct ieee80211softmac_device *mac,
+ struct ieee80211softmac_network *net)
+{
+ struct ieee80211softmac_auth_queue_item *aq = NULL;
+ struct list_head *list_ptr;
+ unsigned long flags;
+
+ function_enter();
+
+ /* Lock and reset status flags */
+ spin_lock_irqsave(&mac->lock, flags);
+ net->authenticating = 0;
+ net->authenticated = 0;
+
+ /* Find correct auth queue item, if it exists */
+ list_for_each(list_ptr, &mac->auth_queue) {
+ aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
+ if (!memcmp(net->bssid, aq->net->bssid, ETH_ALEN))
+ break;
+ else
+ aq = NULL;
+ }
+
+ /* Cancel pending work */
+ if(aq != NULL)
+ /* Not entirely safe? What about running work? */
+ cancel_delayed_work(&aq->work);
+
+ /* Free our network ref */
+ ieee80211softmac_del_network_locked(mac, net);
+ if(net->challenge != NULL)
+ kfree(net->challenge);
+ kfree(net);
+
+ /* let's try to re-associate */
+ queue_work(mac->workqueue, &mac->associnfo.work);
+ spin_unlock_irqrestore(&mac->lock, flags);
+}
+
+/*
+ * Sends a deauth request to the desired AP
+ */
+int
+ieee80211softmac_deauth_req(struct ieee80211softmac_device *mac,
+ struct ieee80211softmac_network *net, int reason)
+{
+ int ret;
+
+ function_enter();
+
+ /* Make sure the network is authenticated */
+ if (!net->authenticated)
+ {
+ printkl(KERN_DEBUG PFX "Can't send deauthentication packet, network is not authenticated.\n");
+ /* Error okay? */
+ return -EPERM;
+ }
+
+ /* Send the de-auth packet */
+ if((ret = ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_DEAUTH, reason)))
+ return ret;
+
+ ieee80211softmac_deauth_from_net(mac, net);
+ return 0;
+}
+
+/*
+ * This should be registered with ieee80211 as handle_deauth
+ */
+int
+ieee80211softmac_deauth_resp(struct net_device *dev, struct ieee80211_auth *auth)
+{
+
+ struct ieee80211softmac_network *net = NULL;
+ struct ieee80211softmac_device *mac = ieee80211_priv(dev);
+
+ function_enter();
+
+ if (!auth) {
+ dprintk("deauth without deauth packet. eek!\n");
+ return 0;
+ }
+
+ net = ieee80211softmac_get_network_by_bssid(mac, auth->header.addr2);
+
+ if (net == NULL) {
+ printkl(KERN_DEBUG PFX "Recieved deauthentication packet from "MAC_FMT", but that network is unknown.\n",
+ MAC_ARG(auth->header.addr2));
+ return 0;
+ }
+
+ /* Make sure the network is authenticated */
+ if(!net->authenticated)
+ {
+ printkl(KERN_DEBUG PFX "Can't perform deauthentication, network is not authenticated.\n");
+ /* Error okay? */
+ return -EPERM;
+ }
+
+ ieee80211softmac_deauth_from_net(mac, net);
+ return 0;
+}