diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/ieee80211/Kconfig | 1 | ||||
| -rw-r--r-- | net/ieee80211/softmac/Kconfig | 9 | ||||
| -rw-r--r-- | net/ieee80211/softmac/Makefile | 9 | ||||
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_assoc.c | 356 | ||||
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_auth.c | 348 | ||||
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_event.c | 135 | ||||
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_io.c | 474 | ||||
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_module.c | 441 | ||||
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_priv.h | 206 | ||||
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_scan.c | 216 | ||||
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_wx.c | 390 |
11 files changed, 2585 insertions, 0 deletions
diff --git a/net/ieee80211/Kconfig b/net/ieee80211/Kconfig index d18ccba3ea9..dbb08528ddf 100644 --- a/net/ieee80211/Kconfig +++ b/net/ieee80211/Kconfig @@ -66,3 +66,4 @@ config IEEE80211_CRYPT_TKIP This can be compiled as a modules and it will be called "ieee80211_crypt_tkip". +source "net/ieee80211/softmac/Kconfig" diff --git a/net/ieee80211/softmac/Kconfig b/net/ieee80211/softmac/Kconfig new file mode 100644 index 00000000000..8d425042591 --- /dev/null +++ b/net/ieee80211/softmac/Kconfig @@ -0,0 +1,9 @@ +config IEEE80211_SOFTMAC + tristate "Software MAC add-on to the IEEE 802.11 networking stack" + ---help--- + This option enables the hardware independent software MAC addon + for the IEEE 802.11 networking stack. + +config IEEE80211_SOFTMAC_DEBUG + bool "Enable full debugging output" + depends on IEEE80211_SOFTMAC diff --git a/net/ieee80211/softmac/Makefile b/net/ieee80211/softmac/Makefile new file mode 100644 index 00000000000..d8c416bdddd --- /dev/null +++ b/net/ieee80211/softmac/Makefile @@ -0,0 +1,9 @@ +obj-$(CONFIG_IEEE80211_SOFTMAC) := ieee80211softmac.o +ieee80211softmac-objs := \ + ieee80211softmac_io.o \ + ieee80211softmac_auth.o \ + ieee80211softmac_module.o \ + ieee80211softmac_scan.o \ + ieee80211softmac_wx.o \ + ieee80211softmac_assoc.o \ + ieee80211softmac_event.o diff --git a/net/ieee80211/softmac/ieee80211softmac_assoc.c b/net/ieee80211/softmac/ieee80211softmac_assoc.c new file mode 100644 index 00000000000..d491005d6cf --- /dev/null +++ b/net/ieee80211/softmac/ieee80211softmac_assoc.c @@ -0,0 +1,356 @@ +#include "ieee80211softmac_priv.h" + +/* + * Overview + * + * Before you can associate, you have to authenticate. + * + */ + +/* Sends out an association request to the desired AP */ +static void +ieee80211softmac_assoc(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net) +{ + unsigned long flags; + function_enter(); + /* Switch to correct channel for this network */ + mac->set_channel(mac->dev, net->channel); + + /* Send association request */ + ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_ASSOC_REQ, 0); + + dprintk(KERN_INFO PFX "sent association request!\n"); + + /* Change the state to associating */ + spin_lock_irqsave(&mac->lock, flags); + mac->associnfo.associating = 1; + mac->associated = 0; /* just to make sure */ + spin_unlock_irqrestore(&mac->lock, flags); + + /* Set a timer for timeout */ + /* FIXME: make timeout configurable */ + queue_delayed_work(mac->workqueue, &mac->associnfo.timeout, 5 * HZ); +} + +void +ieee80211softmac_assoc_timeout(void *d) +{ + struct ieee80211softmac_device *mac = (struct ieee80211softmac_device *)d; + unsigned long flags; + + function_enter(); + + spin_lock_irqsave(&mac->lock, flags); + /* we might race against ieee80211softmac_handle_assoc_response, + * so make sure only one of us does something */ + if (!mac->associnfo.associating) { + spin_unlock_irqrestore(&mac->lock, flags); + return; + } + mac->associnfo.associating = 0; + mac->associnfo.bssvalid = 0; + mac->associated = 0; + spin_unlock_irqrestore(&mac->lock, flags); + + dprintk(KERN_INFO PFX "assoc request timed out!\n"); + /* FIXME: we need to know the network here. that requires a bit of restructuring */ + ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_TIMEOUT, NULL); +} + +static void +ieee80211softmac_reassoc(struct ieee80211softmac_device *mac) +{ + function_enter(); +} + + +/* Sends out a disassociation request to the desired AP */ +static void +ieee80211softmac_disassoc(struct ieee80211softmac_device *mac, u16 reason) +{ + unsigned long flags; + struct ieee80211softmac_network *found; + function_enter(); + + if (mac->associnfo.bssvalid && mac->associated) { + found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid); + if (found) + ieee80211softmac_send_mgt_frame(mac, found, IEEE80211_STYPE_DISASSOC, reason); + } else if (mac->associnfo.associating) { + cancel_delayed_work(&mac->associnfo.timeout); + } + + /* Change our state */ + spin_lock_irqsave(&mac->lock, flags); + /* Do NOT clear bssvalid as that will break ieee80211softmac_assoc_work! */ + mac->associated = 0; + mac->associnfo.associating = 0; + spin_unlock_irqrestore(&mac->lock, flags); +} + +static inline int +we_support_all_basic_rates(struct ieee80211softmac_device *mac, u8 *from, u8 from_len) +{ + int idx, search, found; + u8 rate, search_rate; + + for (idx = 0; idx < (from_len); idx++) { + rate = (from)[idx]; + if (!(rate & IEEE80211_BASIC_RATE_MASK)) + continue; + found = 0; + rate &= ~IEEE80211_BASIC_RATE_MASK; + for (search = 0; search < mac->ratesinfo.count; search++) { + search_rate = mac->ratesinfo.rates[search]; + search_rate &= ~IEEE80211_BASIC_RATE_MASK; + if (rate == search_rate) { + found = 1; + break; + } + } + if (!found) + return 0; + } + return 1; +} + +static int +network_matches_request(struct ieee80211softmac_device *mac, struct ieee80211_network *net) +{ + /* we cannot associate to networks whose name we don't know */ + if (ieee80211_is_empty_essid(net->ssid, net->ssid_len)) + return 0; + /* do not associate to a network whose BSSBasicRateSet we cannot support */ + if (!we_support_all_basic_rates(mac, net->rates, net->rates_len)) + return 0; + /* do we really need to check the ex rates? */ + if (!we_support_all_basic_rates(mac, net->rates_ex, net->rates_ex_len)) + return 0; + + /* if 'ANY' network requested, take any that doesn't have privacy enabled */ + if (mac->associnfo.req_essid.len == 0 + && !(net->capability & WLAN_CAPABILITY_PRIVACY)) + return 1; + if (net->ssid_len != mac->associnfo.req_essid.len) + return 0; + if (!memcmp(net->ssid, mac->associnfo.req_essid.data, mac->associnfo.req_essid.len)) + return 1; + return 0; +} + +static void +ieee80211softmac_assoc_notify(struct net_device *dev, void *context) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + ieee80211softmac_assoc_work((void*)mac); +} + +/* This function is called to handle userspace requests (asynchronously) */ +void +ieee80211softmac_assoc_work(void *d) +{ + struct ieee80211softmac_device *mac = (struct ieee80211softmac_device *)d; + struct ieee80211softmac_network *found = NULL; + struct ieee80211_network *net = NULL, *best = NULL; + unsigned long flags; + + function_enter(); + + /* meh */ + if (mac->associated) + ieee80211softmac_disassoc(mac, WLAN_REASON_DISASSOC_STA_HAS_LEFT); + + /* try to find the requested network in our list, if we found one already */ + if (mac->associnfo.bssvalid) + found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid); + + /* Search the ieee80211 networks for this network if we didn't find it */ + if (!found) + { + spin_lock_irqsave(&mac->ieee->lock, flags); + list_for_each_entry(net, &mac->ieee->network_list, list) { + /* we're supposed to find the network with + * the best signal here, as we're asked to join + * any network with a specific ESSID, and many + * different ones could have that. + * + * I'll for now implement just finding one at all + * + * We also should take into account the rateset + * here to find the best BSSID to try. + */ + if (network_matches_request(mac, net)) { + if (!best) { + best = net; + continue; + } + /* we already had a matching network, so + * compare their properties to get the + * better of the two ... (see above) + */ + /* TODO */ + /* for now, just */ + break; + } + } + /* if we unlock here, we might get interrupted and the `best' + * pointer could go stale */ + if (best) { + found = ieee80211softmac_create_network(mac, best); + /* if found is still NULL, then we got -ENOMEM somewhere */ + if (found) + ieee80211softmac_add_network(mac, found); + } + spin_unlock_irqrestore(&mac->ieee->lock, flags); + } + + if (!found) { + if (mac->associnfo.scan_retry > 0) { + spin_lock_irqsave(&mac->lock, flags); + mac->associnfo.scan_retry--; + spin_unlock_irqrestore(&mac->lock, flags); + + /* We know of no such network. Let's scan. + * NB: this also happens if we had no memory to copy the network info... + * Maybe we can hope to have more memory after scanning finishes ;) + */ + dprintk(KERN_INFO PFX "Associate: Network not known, trying to initiate scan: "); + ieee80211softmac_notify(mac->dev, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, ieee80211softmac_assoc_notify, NULL); + if (ieee80211softmac_start_scan(mac)) + dprintk("failed.\n"); + else + dprintk("ok.\n"); + return; + } + else { + spin_lock_irqsave(&mac->lock, flags); + mac->associnfo.associating = 0; + mac->associated = 0; + spin_unlock_irqrestore(&mac->lock, flags); + + dprintk(KERN_INFO PFX "Unable to find network after scan!\n"); + ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND, NULL); + return; + } + } + + mac->associnfo.bssvalid = 1; + memcpy(mac->associnfo.bssid, found->bssid, ETH_ALEN); + /* copy the ESSID for displaying it */ + mac->associnfo.associate_essid.len = found->essid.len; + memcpy(mac->associnfo.associate_essid.data, found->essid.data, IW_ESSID_MAX_SIZE + 1); + + /* we found a network! authenticate (if necessary) and associate to it. */ + if (!found->authenticated) { + /* This relies on the fact that _auth_req only queues the work, + * otherwise adding the notification would be racy. */ + if (!ieee80211softmac_auth_req(mac, found)) { + dprintk(KERN_INFO PFX "cannot associate without being authenticated, requested authentication\n"); + ieee80211softmac_notify_internal(mac, IEEE80211SOFTMAC_EVENT_ANY, found, ieee80211softmac_assoc_notify, NULL, GFP_KERNEL); + } else { + printkl(KERN_WARNING PFX "Not authenticated, but requesting authentication failed. Giving up to associate\n"); + ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, found); + } + return; + } + /* finally! now we can start associating */ + ieee80211softmac_assoc(mac, found); +} + +/* call this to do whatever is necessary when we're associated */ +static void +ieee80211softmac_associated(struct ieee80211softmac_device *mac, + struct ieee80211_assoc_response * resp, + struct ieee80211softmac_network *net) +{ + mac->associnfo.associating = 0; + mac->associated = 1; + if (mac->set_bssid_filter) + mac->set_bssid_filter(mac->dev, net->bssid); + memcpy(mac->ieee->bssid, net->bssid, ETH_ALEN); + mac->dev->flags |= IFF_RUNNING; + + mac->association_id = le16_to_cpup(&resp->aid); +} + +/* received frame handling functions */ +int +ieee80211softmac_handle_assoc_response(struct net_device * dev, + struct ieee80211_assoc_response * resp, + struct ieee80211_network * _ieee80211_network_do_not_use) +{ + /* NOTE: the network parameter has to be ignored by + * this code because it is the ieee80211's pointer + * to the struct, not ours (we made a copy) + */ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + u16 status = le16_to_cpup(&resp->status); + struct ieee80211softmac_network *network = NULL; + unsigned long flags; + + spin_lock_irqsave(&mac->lock, flags); + + if (!mac->associnfo.associating) { + /* we race against the timeout function, so make sure + * only one of us can do work */ + spin_unlock_irqrestore(&mac->lock, flags); + return 0; + } + network = ieee80211softmac_get_network_by_bssid_locked(mac, resp->header.addr3); + + /* someone sending us things without us knowing him? Ignore. */ + if (!network) { + dprintk(KERN_INFO PFX "Received unrequested assocation response from " MAC_FMT "\n", MAC_ARG(resp->header.addr3)); + spin_unlock_irqrestore(&mac->lock, flags); + return 0; + } + + /* now that we know it was for us, we can cancel the timeout */ + cancel_delayed_work(&mac->associnfo.timeout); + + switch (status) { + case 0: + dprintk(KERN_INFO PFX "associated!\n"); + ieee80211softmac_associated(mac, resp, network); + ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATED, network); + break; + case WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH: + if (!network->auth_desynced_once) { + /* there seem to be a few rare cases where our view of + * the world is obscured, or buggy APs that don't DEAUTH + * us properly. So we handle that, but allow it only once. + */ + printkl(KERN_INFO PFX "We were not authenticated during association, retrying...\n"); + network->authenticated = 0; + /* we don't want to do this more than once ... */ + network->auth_desynced_once = 1; + queue_work(mac->workqueue, &mac->associnfo.work); + break; + } + default: + dprintk(KERN_INFO PFX "associating failed (reason: 0x%x)!\n", status); + mac->associnfo.associating = 0; + mac->associnfo.bssvalid = 0; + mac->associated = 0; + ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, network); + } + + spin_unlock_irqrestore(&mac->lock, flags); + return 0; +} + +int +ieee80211softmac_handle_disassoc(struct net_device * dev, + struct ieee80211_disassoc *disassoc) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + unsigned long flags; + dprintk(KERN_INFO PFX "got disassoc frame\n"); + + spin_lock_irqsave(&mac->lock, flags); + mac->associnfo.bssvalid = 0; + mac->associated = 0; + spin_unlock_irqrestore(&mac->lock, flags); + + return 0; +} diff --git a/net/ieee80211/softmac/ieee80211softmac_auth.c b/net/ieee80211/softmac/ieee80211softmac_auth.c new file mode 100644 index 00000000000..94cac14bc1d --- /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; +} diff --git a/net/ieee80211/softmac/ieee80211softmac_event.c b/net/ieee80211/softmac/ieee80211softmac_event.c new file mode 100644 index 00000000000..0d0a8327252 --- /dev/null +++ b/net/ieee80211/softmac/ieee80211softmac_event.c @@ -0,0 +1,135 @@ +#include "ieee80211softmac_priv.h" + +/* + * Event system + * Also see comments in public header file + * + * Each event has associated to it + * - an event type (see constants in public header) + * - an event context (see below) + * - the function to be called + * - a context (extra parameter to call the function with) + * - and the softmac struct + * + * The event context is private and can only be used from + * within this module. Its meaning varies with the event + * type: + * SCAN_FINISHED: no special meaning + * ASSOCIATED, + * ASSOCIATE_FAILED, + * ASSOCIATE_TIMEOUT, + * AUTHENTICATED, + * AUTH_FAILED, + * AUTH_TIMEOUT: a pointer to the network struct + * ... + * Code within this module can use the event context to be only + * called when the event is true for that specific context + * as per above table. + * If the event context is NULL, then the notification is always called, + * regardless of the event context. The event context is not passed to + * the callback, it is assumed that the context suffices. + * + * You can also use the event context only by setting the event type + * to -1 (private use only), in which case you'll be notified + * whenever the event context matches. + */ + +static char *event_descriptions[IEEE80211SOFTMAC_EVENT_LAST+1] = { + "scan finished", + "associated", + "associating failed", + "associating timed out", + "authenticated", + "authenticating failed", + "authenticating timed out", + "associating failed because no suitable network was found", +}; + + +static void +ieee80211softmac_notify_callback(void *d) +{ + struct ieee80211softmac_event event = *(struct ieee80211softmac_event*) d; + kfree(d); + + event.fun(event.mac->dev, event.context); +} + +int +ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac, + int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask) +{ + struct ieee80211softmac_event *eventptr; + unsigned long flags; + + if (event < -1 || event > IEEE80211SOFTMAC_EVENT_LAST) + return -ENOSYS; + + if (!fun) + return -EINVAL; + + eventptr = kmalloc(sizeof(struct ieee80211softmac_event), gfp_mask); + if (!eventptr) + return -ENOMEM; + + eventptr->event_type = event; + INIT_WORK(&eventptr->work, ieee80211softmac_notify_callback, eventptr); + eventptr->fun = fun; + eventptr->context = context; + eventptr->mac = mac; + eventptr->event_context = event_context; + + spin_lock_irqsave(&mac->lock, flags); + list_add(&eventptr->list, &mac->events); + spin_unlock_irqrestore(&mac->lock, flags); + + return 0; +} + +int +ieee80211softmac_notify_gfp(struct net_device *dev, + int event, notify_function_ptr fun, void *context, gfp_t gfp_mask) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + + if (event < 0 || event > IEEE80211SOFTMAC_EVENT_LAST) + return -ENOSYS; + + return ieee80211softmac_notify_internal(mac, event, NULL, fun, context, gfp_mask); +} +EXPORT_SYMBOL_GPL(ieee80211softmac_notify_gfp); + +/* private -- calling all callbacks that were specified */ +void +ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_ctx) +{ + struct ieee80211softmac_event *eventptr, *tmp; + union iwreq_data wrqu; + char *msg; + + if (event >= 0) { + msg = event_descriptions[event]; + wrqu.data.length = strlen(msg); + wireless_send_event(mac->dev, IWEVCUSTOM, &wrqu, msg); + } + + if (!list_empty(&mac->events)) + list_for_each_entry_safe(eventptr, tmp, &mac->events, list) { + if ((eventptr->event_type == event || eventptr->event_type == -1) + && (eventptr->event_context == NULL || eventptr->event_context == event_ctx)) { + list_del(&eventptr->list); + queue_work(mac->workqueue, &eventptr->work); + } + } +} + +void +ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_ctx) +{ + unsigned long flags; + + spin_lock_irqsave(&mac->lock, flags); + ieee80211softmac_call_events_locked(mac, event, event_ctx); + + spin_unlock_irqrestore(&mac->lock, flags); +} diff --git a/net/ieee80211/softmac/ieee80211softmac_io.c b/net/ieee80211/softmac/ieee80211softmac_io.c new file mode 100644 index 00000000000..2cb3087197d --- /dev/null +++ b/net/ieee80211/softmac/ieee80211softmac_io.c @@ -0,0 +1,474 @@ +/* + * Some parts based on code from net80211 + * Copyright (c) 2001 Atsushi Onoe + * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "ieee80211softmac_priv.h" + +/* Helper functions for inserting data into the frames */ + +/* + * Adds an ESSID element to the frame + * + */ +static u8 * +ieee80211softmac_add_essid(u8 *dst, struct ieee80211softmac_essid *essid) +{ + if (essid) { + *dst++ = MFIE_TYPE_SSID; + *dst++ = essid->len; + memcpy(dst, essid->data, essid->len); + return dst+essid->len; + } else { + *dst++ = MFIE_TYPE_SSID; + *dst++ = 0; + return dst; + } +} + +/* Adds Supported Rates and if required Extended Rates Information Element + * to the frame, ASSUMES WE HAVE A SORTED LIST OF RATES */ +static u8 * +ieee80211softmac_frame_add_rates(u8 *dst, const struct ieee80211softmac_ratesinfo *r) +{ + int cck_len, ofdm_len; + *dst++ = MFIE_TYPE_RATES; + + for(cck_len=0; ieee80211_is_cck_rate(r->rates[cck_len]) && (cck_len < r->count);cck_len++); + + if(cck_len > IEEE80211SOFTMAC_MAX_RATES_LEN) + cck_len = IEEE80211SOFTMAC_MAX_RATES_LEN; + *dst++ = cck_len; + memcpy(dst, r->rates, cck_len); + dst += cck_len; + + if(cck_len < r->count){ + for (ofdm_len=0; ieee80211_is_ofdm_rate(r->rates[ofdm_len + cck_len]) && (ofdm_len + cck_len < r->count); ofdm_len++); + if (ofdm_len > 0) { + if (ofdm_len > IEEE80211SOFTMAC_MAX_EX_RATES_LEN) + ofdm_len = IEEE80211SOFTMAC_MAX_EX_RATES_LEN; + *dst++ = MFIE_TYPE_RATES_EX; + *dst++ = ofdm_len; + memcpy(dst, r->rates + cck_len, ofdm_len); + dst += ofdm_len; + } + } + return dst; +} + +/* Allocate a management frame */ +static u8 * +ieee80211softmac_alloc_mgt(u32 size) +{ + u8 * data; + + /* Add the header and FCS to the size */ + size = size + IEEE80211_3ADDR_LEN; + if(size > IEEE80211_DATA_LEN) + return NULL; + /* Allocate the frame */ + data = kmalloc(size, GFP_ATOMIC); + memset(data, 0, size); + return data; +} + +/* + * Add a 2 Address Header + */ +static void +ieee80211softmac_hdr_2addr(struct ieee80211softmac_device *mac, + struct ieee80211_hdr_2addr *header, u32 type, u8 *dest) +{ + /* Fill in the frame control flags */ + header->frame_ctl = cpu_to_le16(type); + /* Control packets always have WEP turned off */ + if(type > IEEE80211_STYPE_CFENDACK && type < IEEE80211_STYPE_PSPOLL) + header->frame_ctl |= mac->ieee->sec.level ? cpu_to_le16(IEEE80211_FCTL_PROTECTED) : 0; + + /* Fill in the duration */ + header->duration_id = 0; + /* FIXME: How do I find this? + * calculate. But most drivers just fill in 0 (except if it's a station id of course) */ + + /* Fill in the Destination Address */ + if(dest == NULL) + memset(header->addr1, 0xFF, ETH_ALEN); + else + memcpy(header->addr1, dest, ETH_ALEN); + /* Fill in the Source Address */ + memcpy(header->addr2, mac->ieee->dev->dev_addr, ETH_ALEN); + +} + + +/* Add a 3 Address Header */ +static void +ieee80211softmac_hdr_3addr(struct ieee80211softmac_device *mac, + struct ieee80211_hdr_3addr *header, u32 type, u8 *dest, u8 *bssid) +{ + /* This is common with 2addr, so use that instead */ + ieee80211softmac_hdr_2addr(mac, (struct ieee80211_hdr_2addr *)header, type, dest); + + /* Fill in the BSS ID */ + if(bssid == NULL) + memset(header->addr3, 0xFF, ETH_ALEN); + else + memcpy(header->addr3, bssid, ETH_ALEN); + + /* Fill in the sequence # */ + /* FIXME: I need to add this to the softmac struct + * shouldn't the sequence number be in ieee80211? */ +} + + +/***************************************************************************** + * Create Management packets + *****************************************************************************/ + +/* Creates an association request packet */ +u32 +ieee80211softmac_assoc_req(struct ieee80211_assoc_request **pkt, + struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net) +{ + u8 *data; + (*pkt) = (struct ieee80211_assoc_request *)ieee80211softmac_alloc_mgt( + 2 + /* Capability Info */ + 2 + /* Listen Interval */ + /* SSID IE */ + 1 + 1 + IW_ESSID_MAX_SIZE + + /* Rates IE */ + 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN + + /* Extended Rates IE */ + 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN + + /* WPA IE if present */ + mac->wpa.IElen + /* Other IE's? Optional? + * Yeah, probably need an extra IE parameter -- lots of vendors like to + * fill in their own IEs */ + ); + if (unlikely((*pkt) == NULL)) + return 0; + ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_ASSOC_REQ, net->bssid, net->bssid); + + /* Fill in capability Info */ + (*pkt)->capability = (mac->ieee->iw_mode == IW_MODE_MASTER) || (mac->ieee->iw_mode == IW_MODE_INFRA) ? + cpu_to_le16(WLAN_CAPABILITY_ESS) : + cpu_to_le16(WLAN_CAPABILITY_IBSS); + /* Need to add this + (*pkt)->capability |= mac->ieee->short_slot ? + cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0; + */ + (*pkt)->capability |= mac->ieee->sec.level ? cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0; + /* Fill in Listen Interval (?) */ + (*pkt)->listen_interval = cpu_to_le16(10); + + data = (u8 *)(*pkt)->info_element; + /* Add SSID */ + data = ieee80211softmac_add_essid(data, &net->essid); + /* Add Rates */ + data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo); + /* Add WPA IE */ + if (mac->wpa.IElen && mac->wpa.IE) { + memcpy(data, mac->wpa.IE, mac->wpa.IElen); + data += mac->wpa.IElen; + } + /* Return the number of used bytes */ + return (data - (u8*)(*pkt)); +} + +/* Create a reassociation request packet */ +u32 +ieee80211softmac_reassoc_req(struct ieee80211_reassoc_request **pkt, + struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net) +{ + u8 *data; + (*pkt) = (struct ieee80211_reassoc_request *)ieee80211softmac_alloc_mgt( + 2 + /* Capability Info */ + 2 + /* Listen Interval */ + ETH_ALEN + /* AP MAC */ + /* SSID IE */ + 1 + 1 + IW_ESSID_MAX_SIZE + + /* Rates IE */ + 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN + + /* Extended Rates IE */ + 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN + /* Other IE's? */ + ); + if (unlikely((*pkt) == NULL)) + return 0; + ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_REASSOC_REQ, net->bssid, net->bssid); + + /* Fill in capability Info */ + (*pkt)->capability = mac->ieee->iw_mode == IW_MODE_MASTER ? + cpu_to_le16(WLAN_CAPABILITY_ESS) : + cpu_to_le16(WLAN_CAPABILITY_IBSS); + /* + (*pkt)->capability |= mac->ieee->short_slot ? + cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0; + */ + (*pkt)->capability |= mac->ieee->sec.level ? + cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0; + + /* Fill in Listen Interval (?) */ + (*pkt)->listen_interval = cpu_to_le16(10); + /* Fill in the current AP MAC */ + memcpy((*pkt)->current_ap, mac->ieee->bssid, ETH_ALEN); + + data = (u8 *)(*pkt)->info_element; + /* Add SSID */ + data = ieee80211softmac_add_essid(data, &net->essid); + /* Add Rates */ + data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo); + /* Return packet size */ + return (data - (u8 *)(*pkt)); +} + +/* Create an authentication packet */ +u32 +ieee80211softmac_auth(struct ieee80211_auth **pkt, + struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, + u16 transaction, u16 status) +{ + u8 *data; + /* Allocate Packet */ + (*pkt) = (struct ieee80211_auth *)ieee80211softmac_alloc_mgt( + 2 + /* Auth Algorithm */ + 2 + /* Auth Transaction Seq */ + 2 + /* Status Code */ + /* Challenge Text IE */ + mac->ieee->open_wep ? 0 : + 1 + 1 + WLAN_AUTH_CHALLENGE_LEN + ); + if (unlikely((*pkt) == NULL)) + return 0; + ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_AUTH, net->bssid, net->bssid); + + /* Algorithm */ + (*pkt)->algorithm = mac->ieee->open_wep ? + cpu_to_le16(WLAN_AUTH_OPEN) : + cpu_to_le16(WLAN_AUTH_SHARED_KEY); + /* Transaction */ + (*pkt)->transaction = cpu_to_le16(transaction); + /* Status */ + (*pkt)->status = cpu_to_le16(status); + + data = (u8 *)(*pkt)->info_element; + /* Challenge Text */ + if(!mac->ieee->open_wep){ + *data = MFIE_TYPE_CHALLENGE; + data++; + + /* Copy the challenge in */ + // *data = challenge length + // data += sizeof(u16); + // memcpy(data, challenge, challenge length); + // data += challenge length; + + /* Add the full size to the packet length */ + } + + /* Return the packet size */ + return (data - (u8 *)(*pkt)); +} + +/* Create a disassocation or deauthentication packet */ +u32 +ieee80211softmac_disassoc_deauth(struct ieee80211_disassoc **pkt, + struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, + u16 type, u16 reason) +{ + /* Allocate Packet */ + (*pkt) = (struct ieee80211_disassoc *)ieee80211softmac_alloc_mgt(2); + if (unlikely(pkt == NULL)) + return 0; + ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), type, net->bssid, net->bssid); + /* Reason */ + (*pkt)->reason = cpu_to_le16(reason); + /* Return the packet size */ + return (2 + IEEE80211_3ADDR_LEN); +} + +/* Create a probe request packet */ +u32 +ieee80211softmac_probe_req(struct ieee80211_probe_request **pkt, + struct ieee80211softmac_device *mac, struct ieee80211softmac_essid *essid) +{ + u8 *data; + /* Allocate Packet */ + (*pkt) = (struct ieee80211_probe_request *)ieee80211softmac_alloc_mgt( + /* SSID of requested network */ + 1 + 1 + IW_ESSID_MAX_SIZE + + /* Rates IE */ + 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN + + /* Extended Rates IE */ + 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN + ); + if (unlikely((*pkt) == NULL)) + return 0; + ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_REQ, NULL, NULL); + + data = (u8 *)(*pkt)->info_element; + /* Add ESSID (can be NULL) */ + data = ieee80211softmac_add_essid(data, essid); + /* Add Rates */ + data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo); + /* Return packet size */ + return (data - (u8 *)(*pkt)); +} + +/* Create a probe response packet */ +/* FIXME: Not complete */ +u32 +ieee80211softmac_probe_resp(struct ieee80211_probe_response **pkt, + struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net) +{ + u8 *data; + /* Allocate Packet */ + (*pkt) = (struct ieee80211_probe_response *)ieee80211softmac_alloc_mgt( + 8 + /* Timestamp */ + 2 + /* Beacon Interval */ + 2 + /* Capability Info */ + /* SSID IE */ + 1 + 1 + IW_ESSID_MAX_SIZE + + 7 + /* FH Parameter Set */ + 2 + /* DS Parameter Set */ + 8 + /* CF Parameter Set */ + 4 /* IBSS Parameter Set */ + ); + if (unlikely((*pkt) == NULL)) + return 0; + ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_RESP, net->bssid, net->bssid); + data = (u8 *)(*pkt)->info_element; + + /* Return the packet size */ + return (data - (u8 *)(*pkt)); +} + + +/* Sends a manangement packet + * FIXME: document the use of the arg parameter + * for _AUTH: (transaction #) | (status << 16) + */ +int +ieee80211softmac_send_mgt_frame(struct ieee80211softmac_device *mac, + void *ptrarg, u32 type, u32 arg) +{ + void *pkt = NULL; + u32 pkt_size = 0; + + switch(type) { + case IEEE80211_STYPE_ASSOC_REQ: + pkt_size = ieee80211softmac_assoc_req((struct ieee80211_assoc_request **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg); + break; + case IEEE80211_STYPE_REASSOC_REQ: + pkt_size = ieee80211softmac_reassoc_req((struct ieee80211_reassoc_request **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg); + break; + case IEEE80211_STYPE_AUTH: + pkt_size = ieee80211softmac_auth((struct ieee80211_auth **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg, (u16)(arg & 0xFFFF), (u16) (arg >> 16)); + break; + case IEEE80211_STYPE_DISASSOC: + case IEEE80211_STYPE_DEAUTH: + pkt_size = ieee80211softmac_disassoc_deauth((struct ieee80211_disassoc **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg, type, (u16)(arg & 0xFFFF)); + break; + case IEEE80211_STYPE_PROBE_REQ: + pkt_size = ieee80211softmac_probe_req((struct ieee80211_probe_request **)(&pkt), mac, (struct ieee80211softmac_essid *)ptrarg); + break; + case IEEE80211_STYPE_PROBE_RESP: + pkt_size = ieee80211softmac_probe_resp((struct ieee80211_probe_response **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg); + break; + default: + printkl(KERN_DEBUG PFX "Unsupported Management Frame type: %i\n", type); + return -EINVAL; + }; + + if(pkt_size == 0 || pkt == NULL) { + printkl(KERN_DEBUG PFX "Error, packet is nonexistant or 0 length\n"); + return -ENOMEM; + } + + /* Send the packet to the ieee80211 layer for tx */ + /* we defined softmac->mgmt_xmit for this. Should we keep it + * as it is (that means we'd need to wrap this into a txb), + * modify the prototype (so it matches this function), + * or get rid of it alltogether? + * Does this work for you now? + */ + ieee80211_tx_frame(mac->ieee, (struct ieee80211_hdr *)pkt, pkt_size); + + kfree(pkt); + return 0; +} + + +/* Create an rts/cts frame */ +u32 +ieee80211softmac_rts_cts(struct ieee80211_hdr_2addr **pkt, + struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, + u32 type) +{ + /* Allocate Packet */ + (*pkt) = kmalloc(IEEE80211_2ADDR_LEN, GFP_ATOMIC); + memset(*pkt, 0, IEEE80211_2ADDR_LEN); + if((*pkt) == NULL) + return 0; + ieee80211softmac_hdr_2addr(mac, (*pkt), type, net->bssid); + return IEEE80211_2ADDR_LEN; +} + + +/* Sends a control packet */ +static int +ieee80211softmac_send_ctl_frame(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *net, u32 type, u32 arg) +{ + void *pkt = NULL; + u32 pkt_size = 0; + + switch(type) { + case IEEE80211_STYPE_RTS: + case IEEE80211_STYPE_CTS: + pkt_size = ieee80211softmac_rts_cts((struct ieee80211_hdr_2addr **)(&pkt), mac, net, type); + break; + default: + printkl(KERN_DEBUG PFX "Unsupported Control Frame type: %i\n", type); + return -EINVAL; + } + + if(pkt_size == 0) + return -ENOMEM; + + /* Send the packet to the ieee80211 layer for tx */ + ieee80211_tx_frame(mac->ieee, (struct ieee80211_hdr *) pkt, pkt_size); + + kfree(pkt); + return 0; +} diff --git a/net/ieee80211/softmac/ieee80211softmac_module.c b/net/ieee80211/softmac/ieee80211softmac_module.c new file mode 100644 index 00000000000..1244a659cd8 --- /dev/null +++ b/net/ieee80211/softmac/ieee80211softmac_module.c @@ -0,0 +1,441 @@ +#include "ieee80211softmac_priv.h" +#include <linux/sort.h> + +struct net_device *alloc_ieee80211softmac(int sizeof_priv) +{ + struct ieee80211softmac_device *softmac; + struct net_device *dev; + + dev = alloc_ieee80211(sizeof(struct ieee80211softmac_device) + sizeof_priv); + softmac = ieee80211_priv(dev); + softmac->dev = dev; + softmac->ieee = netdev_priv(dev); + spin_lock_init(&softmac->lock); + + softmac->ieee->handle_auth = ieee80211softmac_auth_resp; + softmac->ieee->handle_deauth = ieee80211softmac_deauth_resp; + softmac->ieee->handle_assoc_response = ieee80211softmac_handle_assoc_response; + softmac->ieee->handle_disassoc = ieee80211softmac_handle_disassoc; + softmac->scaninfo = NULL; + + /* TODO: initialise all the other callbacks in the ieee struct + * (once they're written) + */ + + softmac->workqueue = create_workqueue("80211softmac"); + if (!softmac->workqueue) + goto err_free_ieee80211; + + INIT_LIST_HEAD(&softmac->auth_queue); + INIT_LIST_HEAD(&softmac->network_list); + INIT_LIST_HEAD(&softmac->events); + + INIT_WORK(&softmac->associnfo.work, ieee80211softmac_assoc_work, softmac); + INIT_WORK(&softmac->associnfo.timeout, ieee80211softmac_assoc_timeout, softmac); + softmac->start_scan = ieee80211softmac_start_scan_implementation; + softmac->wait_for_scan = ieee80211softmac_wait_for_scan_implementation; + softmac->stop_scan = ieee80211softmac_stop_scan_implementation; + + //TODO: The mcast rate has to be assigned dynamically somewhere (in scanning, association. Not sure...) + // It has to be set to the highest rate all stations in the current network can handle. + softmac->txrates.mcast_rate = IEEE80211_CCK_RATE_1MB; + softmac->txrates.mcast_fallback = IEEE80211_CCK_RATE_1MB; + /* This is reassigned in ieee80211softmac_start to sane values. */ + softmac->txrates.default_rate = IEEE80211_CCK_RATE_1MB; + softmac->txrates.default_fallback = IEEE80211_CCK_RATE_1MB; + + /* should we also assign softmac->mgmt_xmit here so + * that it is always valid? If so, we probably want + * to define a new function for that which just + * wraps ieee80211_tx_frame + */ + + /* until associated, we're not ready */ + dev->flags &= ~IFF_RUNNING; + + return dev; + +err_free_ieee80211: + free_ieee80211(dev); + + return NULL; +} + +/* Clears the pending work queue items, stops all scans, etc. */ +void +ieee80211softmac_clear_pending_work(struct ieee80211softmac_device *sm) +{ + unsigned long flags; + struct ieee80211softmac_event *eventptr, *eventtmp; + struct ieee80211softmac_auth_queue_item *authptr, *authtmp; + struct ieee80211softmac_network *netptr, *nettmp; + + ieee80211softmac_stop_scan(sm); + ieee80211softmac_wait_for_scan(sm); + + spin_lock_irqsave(&sm->lock, flags); + /* Free all pending assoc work items */ + cancel_delayed_work(&sm->associnfo.work); + + /* Free all pending scan work items */ + if(sm->scaninfo != NULL) + cancel_delayed_work(&sm->scaninfo->softmac_scan); + + /* Free all pending auth work items */ + list_for_each_entry(authptr, &sm->auth_queue, list) + cancel_delayed_work(&authptr->work); + + /* delete all pending event calls and work items */ + list_for_each_entry_safe(eventptr, eventtmp, &sm->events, list) + cancel_delayed_work(&eventptr->work); + + spin_unlock_irqrestore(&sm->lock, flags); + flush_workqueue(sm->workqueue); + + // now we should be save and no longer need locking... + spin_lock_irqsave(&sm->lock, flags); + /* Free all pending auth work items */ + list_for_each_entry_safe(authptr, authtmp, &sm->auth_queue, list) { + list_del(&authptr->list); + kfree(authptr); + } + + /* delete all pending event calls and work items */ + list_for_each_entry_safe(eventptr, eventtmp, &sm->events, list) { + list_del(&eventptr->list); + kfree(eventptr); + } + + /* Free all networks */ + list_for_each_entry_safe(netptr, nettmp, &sm->network_list, list) { + ieee80211softmac_del_network_locked(sm, netptr); + if(netptr->challenge != NULL) + kfree(netptr->challenge); + kfree(netptr); + } + + spin_unlock_irqrestore(&sm->lock, flags); +} + +void free_ieee80211softmac(struct net_device *dev) +{ + struct ieee80211softmac_device *sm = ieee80211_priv(dev); + ieee80211softmac_clear_pending_work(sm); + destroy_workqueue(sm->workqueue); + kfree(sm->scaninfo); + kfree(sm->wpa.IE); + free_ieee80211(dev); +} + +static void ieee80211softmac_start_check_rates(struct ieee80211softmac_device *mac) +{ + struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo; + /* I took out the sorting check, we're seperating by modulation now. */ + if (ri->count) + return; + /* otherwise assume we hav'em all! */ + if (mac->ieee->modulation & IEEE80211_CCK_MODULATION) { + ri->rates[ri->count++] = IEEE80211_CCK_RATE_1MB; + ri->rates[ri->count++] = IEEE80211_CCK_RATE_2MB; + ri->rates[ri->count++] = IEEE80211_CCK_RATE_5MB; + ri->rates[ri->count++] = IEEE80211_CCK_RATE_11MB; + } + if (mac->ieee->modulation & IEEE80211_OFDM_MODULATION) { + ri->rates[ri->count++] = IEEE80211_OFDM_RATE_6MB; + ri->rates[ri->count++] = IEEE80211_OFDM_RATE_9MB; + ri->rates[ri->count++] = IEEE80211_OFDM_RATE_12MB; + ri->rates[ri->count++] = IEEE80211_OFDM_RATE_18MB; + ri->rates[ri->count++] = IEEE80211_OFDM_RATE_24MB; + ri->rates[ri->count++] = IEEE80211_OFDM_RATE_36MB; + ri->rates[ri->count++] = IEEE80211_OFDM_RATE_48MB; + ri->rates[ri->count++] = IEEE80211_OFDM_RATE_54MB; + } +} + +void ieee80211softmac_start(struct net_device *dev) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + struct ieee80211_device *ieee = mac->ieee; + u32 change = 0; + struct ieee80211softmac_txrates oldrates; + + ieee80211softmac_start_check_rates(mac); + + /* TODO: We need some kind of state machine to lower the default rates + * if we loose too many packets. + */ + /* Change the default txrate to the highest possible value. + * The txrate machine will lower it, if it is too high. + */ + if (mac->txrates_change) + oldrates = mac->txrates; + if (ieee->modulation & IEEE80211_OFDM_MODULATION) { + mac->txrates.default_rate = IEEE80211_OFDM_RATE_54MB; + change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT; + mac->txrates.default_fallback = IEEE80211_OFDM_RATE_24MB; + change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK; + } else if (ieee->modulation & IEEE80211_CCK_MODULATION) { + mac->txrates.default_rate = IEEE80211_CCK_RATE_11MB; + change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT; + mac->txrates.default_fallback = IEEE80211_CCK_RATE_5MB; + change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK; + } else + assert(0); + if (mac->txrates_change) + mac->txrates_change(dev, change, &oldrates); +} + +void ieee80211softmac_stop(struct net_device *dev) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + + ieee80211softmac_clear_pending_work(mac); +} + +void ieee80211softmac_set_rates(struct net_device *dev, u8 count, u8 *rates) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&mac->lock, flags); + memcpy(mac->ratesinfo.rates, rates, count); + mac->ratesinfo.count = count; + spin_unlock_irqrestore(&mac->lock, flags); +} + +static u8 raise_rate(struct ieee80211softmac_device *mac, u8 rate) +{ + int i; + struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo; + + for (i=0; i<ri->count-1; i++) { + if (ri->rates[i] == rate) + return ri->rates[i+1]; + } + /* I guess we can't go any higher... */ + return ri->rates[ri->count]; +} + +u8 ieee80211softmac_lower_rate_delta(struct ieee80211softmac_device *mac, u8 rate, int delta) +{ + int i; + struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo; + + for (i=delta; i<ri->count; i++) { + if (ri->rates[i] == rate) + return ri->rates[i-delta]; + } + /* I guess we can't go any lower... */ + return ri->rates[0]; +} + +static void ieee80211softmac_add_txrates_badness(struct ieee80211softmac_device *mac, + int amount) +{ + struct ieee80211softmac_txrates oldrates; + u8 default_rate = mac->txrates.default_rate; + u8 default_fallback = mac->txrates.default_fallback; + u32 changes = 0; + + //TODO: This is highly experimental code. + // Maybe the dynamic rate selection does not work + // and it has to be removed again. + +printk("badness %d\n", mac->txrate_badness); + mac->txrate_badness += amount; + if (mac->txrate_badness <= -1000) { + /* Very small badness. Try a faster bitrate. */ + if (mac->txrates_change) + memcpy(&oldrates, &mac->txrates, sizeof(oldrates)); + default_rate = raise_rate(mac, default_rate); + changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT; + default_fallback = get_fallback_rate(mac, default_rate); + changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK; + mac->txrate_badness = 0; +printk("Bitrate raised to %u\n", default_rate); + } else if (mac->txrate_badness >= 10000) { + /* Very high badness. Try a slower bitrate. */ + if (mac->txrates_change) + memcpy(&oldrates, &mac->txrates, sizeof(oldrates)); + default_rate = lower_rate(mac, default_rate); + changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT; + default_fallback = get_fallback_rate(mac, default_rate); + changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK; + mac->txrate_badness = 0; +printk("Bitrate lowered to %u\n", default_rate); + } + + mac->txrates.default_rate = default_rate; + mac->txrates.default_fallback = default_fallback; + + if (changes && mac->txrates_change) + mac->txrates_change(mac->dev, changes, &oldrates); +} + +void ieee80211softmac_fragment_lost(struct net_device *dev, + u16 wl_seq) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&mac->lock, flags); + ieee80211softmac_add_txrates_badness(mac, 1000); + //TODO + + spin_unlock_irqrestore(&mac->lock, flags); +} + +static int rate_cmp(const void *a_, const void *b_) { + u8 *a, *b; + a = (u8*)a_; + b = (u8*)b_; + return ((*a & ~IEEE80211_BASIC_RATE_MASK) - (*b & ~IEEE80211_BASIC_RATE_MASK)); +} + +/* Allocate a softmac network struct and fill it from a network */ +struct ieee80211softmac_network * +ieee80211softmac_create_network(struct ieee80211softmac_device *mac, + struct ieee80211_network *net) +{ + struct ieee80211softmac_network *softnet; + softnet = kzalloc(sizeof(struct ieee80211softmac_network), GFP_ATOMIC); + if(softnet == NULL) + return NULL; + memcpy(softnet->bssid, net->bssid, ETH_ALEN); + softnet->channel = net->channel; + softnet->essid.len = net->ssid_len; + memcpy(softnet->essid.data, net->ssid, softnet->essid.len); + + /* copy rates over */ + softnet->supported_rates.count = net->rates_len; + memcpy(&softnet->supported_rates.rates[0], net->rates, net->rates_len); + memcpy(&softnet->supported_rates.rates[softnet->supported_rates.count], net->rates_ex, net->rates_ex_len); + softnet->supported_rates.count += net->rates_ex_len; + sort(softnet->supported_rates.rates, softnet->supported_rates.count, sizeof(softnet->supported_rates.rates[0]), rate_cmp, NULL); + + softnet->capabilities = net->capability; + return softnet; +} + + +/* Add a network to the list, while locked */ +void +ieee80211softmac_add_network_locked(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *add_net) +{ + struct list_head *list_ptr; + struct ieee80211softmac_network *softmac_net = NULL; + + list_for_each(list_ptr, &mac->network_list) { + softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list); + if(!memcmp(softmac_net->bssid, add_net->bssid, ETH_ALEN)) + break; + else + softmac_net = NULL; + } + if(softmac_net == NULL) + list_add(&(add_net->list), &mac->network_list); +} + +/* Add a network to the list, with locking */ +void +ieee80211softmac_add_network(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *add_net) +{ + unsigned long flags; + spin_lock_irqsave(&mac->lock, flags); + ieee80211softmac_add_network_locked(mac, add_net); + spin_unlock_irqrestore(&mac->lock, flags); +} + + +/* Delete a network from the list, while locked*/ +void +ieee80211softmac_del_network_locked(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *del_net) +{ + list_del(&(del_net->list)); +} + +/* Delete a network from the list with locking */ +void +ieee80211softmac_del_network(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *del_net) +{ + unsigned long flags; + spin_lock_irqsave(&mac->lock, flags); + ieee80211softmac_del_network_locked(mac, del_net); + spin_unlock_irqrestore(&mac->lock, flags); +} + +/* Get a network from the list by MAC while locked */ +struct ieee80211softmac_network * +ieee80211softmac_get_network_by_bssid_locked(struct ieee80211softmac_device *mac, + u8 *bssid) +{ + struct list_head *list_ptr; + struct ieee80211softmac_network *softmac_net = NULL; + list_for_each(list_ptr, &mac->network_list) { + softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list); + if(!memcmp(softmac_net->bssid, bssid, ETH_ALEN)) + break; + else + softmac_net = NULL; + } + return softmac_net; +} + +/* Get a network from the list by BSSID with locking */ +struct ieee80211softmac_network * +ieee80211softmac_get_network_by_bssid(struct ieee80211softmac_device *mac, + u8 *bssid) +{ + unsigned long flags; + struct ieee80211softmac_network *softmac_net; + + spin_lock_irqsave(&mac->lock, flags); + softmac_net = ieee80211softmac_get_network_by_bssid_locked(mac, bssid); + spin_unlock_irqrestore(&mac->lock, flags); + return softmac_net; +} + +/* Get a network from the list by ESSID while locked */ +struct ieee80211softmac_network * +ieee80211softmac_get_network_by_essid_locked(struct ieee80211softmac_device *mac, + struct ieee80211softmac_essid *essid) +{ + struct list_head *list_ptr; + struct ieee80211softmac_network *softmac_net = NULL; + + list_for_each(list_ptr, &mac->network_list) { + softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list); + if (softmac_net->essid.len == essid->len && + !memcmp(softmac_net->essid.data, essid->data, essid->len)) + return softmac_net; + } + return NULL; +} + +/* Get a network from the list by ESSID with locking */ +struct ieee80211softmac_network * +ieee80211softmac_get_network_by_essid(struct ieee80211softmac_device *mac, + struct ieee80211softmac_essid *essid) +{ + unsigned long flags; + struct ieee80211softmac_network *softmac_net = NULL; + + spin_lock_irqsave(&mac->lock, flags); + softmac_net = ieee80211softmac_get_network_by_essid_locked(mac, essid); + spin_unlock_irqrestore(&mac->lock, flags); + return softmac_net; +} + +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL_GPL(alloc_ieee80211softmac); +EXPORT_SYMBOL_GPL(free_ieee80211softmac); +EXPORT_SYMBOL_GPL(ieee80211softmac_set_rates); +EXPORT_SYMBOL_GPL(ieee80211softmac_start); +EXPORT_SYMBOL_GPL(ieee80211softmac_stop); +EXPORT_SYMBOL_GPL(ieee80211softmac_fragment_lost); +EXPORT_SYMBOL_GPL(ieee80211softmac_clear_pending_work); diff --git a/net/ieee80211/softmac/ieee80211softmac_priv.h b/net/ieee80211/softmac/ieee80211softmac_priv.h new file mode 100644 index 00000000000..591d3bdf37e --- /dev/null +++ b/net/ieee80211/softmac/ieee80211softmac_priv.h @@ -0,0 +1,206 @@ +#ifndef IEEE80211SOFTMAC_PRIV_H_ +#define IEEE80211SOFTMAC_PRIV_H_ + +#include <net/ieee80211softmac.h> +#include <net/ieee80211softmac_wx.h> +#include <linux/kernel.h> +#include <linux/stringify.h> + + +#define PFX "SoftMAC: " + +#ifdef assert +# undef assert +#endif +#ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG +#define assert(expr) \ + do { \ + if (unlikely(!(expr))) { \ + printkl(KERN_ERR PFX "ASSERTION FAILED (%s) at: %s:%d:%s()\n", #expr, \ + __FILE__, __LINE__, __FUNCTION__); \ + } \ + } while (0) +#else +#define assert(expr) do {} while (0) +#endif + +/* rate limited printk(). */ +#ifdef printkl +# undef printkl +#endif +#define printkl(f, x...) do { if (printk_ratelimit()) printk(f ,##x); } while (0) +/* rate limited printk() for debugging */ +#ifdef dprintkl +# undef dprintkl +#endif +#ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG +# define dprintkl printkl +#else +# define dprintkl(f, x...) do { /* nothing */ } while (0) +#endif + +/* debugging printk() */ +#ifdef dprintk +# undef dprintk +#endif +#ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG +# define dprintk(f, x...) do { printk(f ,##x); } while (0) +#else +# define dprintk(f, x...) do { /* nothing */ } while (0) +#endif + +#ifdef function_enter +# undef function_enter +#endif +#ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG +# define function_enter() do { printk(KERN_DEBUG PFX "%s:%d:%s()\n", __FILE__, __LINE__, __FUNCTION__); } while (0) +#else +# define function_enter() do { /* nothing */ } while (0) +#endif + +/* private definitions and prototypes */ + +/*** prototypes from _scan.c */ +void ieee80211softmac_scan(void *sm); +/* for internal use if scanning is needed */ +int ieee80211softmac_start_scan(struct ieee80211softmac_device *mac); +void ieee80211softmac_stop_scan(struct ieee80211softmac_device *mac); +void ieee80211softmac_wait_for_scan(struct ieee80211softmac_device *mac); + +/* for use by _module.c to assign to the callbacks */ +int ieee80211softmac_start_scan_implementation(struct net_device *dev); +void ieee80211softmac_stop_scan_implementation(struct net_device *dev); +void ieee80211softmac_wait_for_scan_implementation(struct net_device *dev); + +/*** Network prototypes from _module.c */ +struct ieee80211softmac_network * ieee80211softmac_create_network( + struct ieee80211softmac_device *mac, struct ieee80211_network *net); +void ieee80211softmac_add_network_locked(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *net); +void ieee80211softmac_add_network(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *net); +void ieee80211softmac_del_network_locked(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *net); +void ieee80211softmac_del_network(struct ieee80211softmac_device *mac, + struct ieee80211softmac_network *net); +struct ieee80211softmac_network * ieee80211softmac_get_network_by_bssid_locked( + struct ieee80211softmac_device *mac, u8 *ea); +struct ieee80211softmac_network * ieee80211softmac_get_network_by_bssid( + struct ieee80211softmac_device *mac, u8 *ea); +struct ieee80211softmac_network * ieee80211softmac_get_network_by_ssid_locked( + struct ieee80211softmac_device *mac, u8 *ssid, u8 ssid_len); +struct ieee80211softmac_network * ieee80211softmac_get_network_by_ssid( + struct ieee80211softmac_device *mac, u8 *ssid, u8 ssid_len); + + +/* Rates related */ +u8 ieee80211softmac_lower_rate_delta(struct ieee80211softmac_device *mac, u8 rate, int delta); +static inline u8 lower_rate(struct ieee80211softmac_device *mac, u8 rate) { + return ieee80211softmac_lower_rate_delta(mac, rate, 1); +} + +static inline u8 get_fallback_rate(struct ieee80211softmac_device *mac, u8 rate) +{ + return ieee80211softmac_lower_rate_delta(mac, rate, 2); +} + + +/*** prototypes from _io.c */ +int ieee80211softmac_send_mgt_frame(struct ieee80211softmac_device *mac, + void* ptrarg, u32 type, u32 arg); + +/*** prototypes from _auth.c */ +/* do these have to go into the public header? */ +int ieee80211softmac_auth_req(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net); +int ieee80211softmac_deauth_req(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, int reason); + +/* for use by _module.c to assign to the callbacks */ +int ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth); +int ieee80211softmac_deauth_resp(struct net_device *dev, struct ieee80211_auth *auth); + +/*** prototypes from _assoc.c */ +void ieee80211softmac_assoc_work(void *d); +int ieee80211softmac_handle_assoc_response(struct net_device * dev, + struct ieee80211_assoc_response * resp, + struct ieee80211_network * network); +int ieee80211softmac_handle_disassoc(struct net_device * dev, + struct ieee80211_disassoc * disassoc); +void ieee80211softmac_assoc_timeout(void *d); + +/* some helper functions */ +static inline int ieee80211softmac_scan_handlers_check_self(struct ieee80211softmac_device *sm) +{ + return (sm->start_scan == ieee80211softmac_start_scan_implementation) && + (sm->stop_scan == ieee80211softmac_stop_scan_implementation) && + (sm->wait_for_scan == ieee80211softmac_wait_for_scan_implementation); +} + +static inline int ieee80211softmac_scan_sanity_check(struct ieee80211softmac_device *sm) +{ + return ((sm->start_scan != ieee80211softmac_start_scan_implementation) && + (sm->stop_scan != ieee80211softmac_stop_scan_implementation) && + (sm->wait_for_scan != ieee80211softmac_wait_for_scan_implementation) + ) || ieee80211softmac_scan_handlers_check_self(sm); +} + +#define IEEE80211SOFTMAC_PROBE_DELAY HZ/2 +#define IEEE80211SOFTMAC_WORKQUEUE_NAME_LEN (17 + IFNAMSIZ) + +struct ieee80211softmac_network { + struct list_head list; /* List */ + /* Network information copied from ieee80211_network */ + u8 bssid[ETH_ALEN]; + u8 channel; + struct ieee80211softmac_essid essid; + + struct ieee80211softmac_ratesinfo supported_rates; + + /* SoftMAC specific */ + u16 authenticating:1, /* Status Flags */ + authenticated:1, + auth_desynced_once:1; + + u16 capabilities; /* Capabilities bitfield */ + u8 challenge_len; /* Auth Challenge length */ + char *challenge; /* Challenge Text */ +}; + +/* structure used to keep track of networks we're auth'ing to */ +struct ieee80211softmac_auth_queue_item { + struct list_head list; /* List head */ + struct ieee80211softmac_network *net; /* Network to auth */ + struct ieee80211softmac_device *mac; /* SoftMAC device */ + u8 retry; /* Retry limit */ + u8 state; /* Auth State */ + struct work_struct work; /* Work queue */ +}; + +/* scanning information */ +struct ieee80211softmac_scaninfo { + u8 current_channel_idx, + number_channels; + struct ieee80211_channel *channels; + u8 started:1, + stop:1; + u8 skip_flags; + struct completion finished; + struct work_struct softmac_scan; +}; + +/* private event struct */ +struct ieee80211softmac_event { + struct list_head list; + int event_type; + void *event_context; + struct work_struct work; + notify_function_ptr fun; + void *context; + struct ieee80211softmac_device *mac; +}; + +void ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_context); +void ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_context); +int ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac, + int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask); + +#endif /* IEEE80211SOFTMAC_PRIV_H_ */ diff --git a/net/ieee80211/softmac/ieee80211softmac_scan.c b/net/ieee80211/softmac/ieee80211softmac_scan.c new file mode 100644 index 00000000000..b4b44fa8727 --- /dev/null +++ b/net/ieee80211/softmac/ieee80211softmac_scan.c @@ -0,0 +1,216 @@ +/* + * Scanning routines. + * + * These are not exported because they're assigned to the function pointers. + */ + +#include <linux/completion.h> +#include "ieee80211softmac_priv.h" + +/* internal, use to trigger scanning if needed. + * Returns -EBUSY if already scanning, + * result of start_scan otherwise */ +int +ieee80211softmac_start_scan(struct ieee80211softmac_device *sm) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&sm->lock, flags); + if (sm->scanning) + { + spin_unlock_irqrestore(&sm->lock, flags); + return -EINPROGRESS; + } + sm->scanning = 1; + spin_unlock_irqrestore(&sm->lock, flags); + + ret = sm->start_scan(sm->dev); + if (ret) { + spin_lock_irqsave(&sm->lock, flags); + sm->scanning = 0; + spin_unlock_irqrestore(&sm->lock, flags); + } + return ret; +} + +void +ieee80211softmac_stop_scan(struct ieee80211softmac_device *sm) +{ + unsigned long flags; + + spin_lock_irqsave(&sm->lock, flags); + + if (!sm->scanning) { + spin_unlock_irqrestore(&sm->lock, flags); + return; + } + + spin_unlock_irqrestore(&sm->lock, flags); + sm->stop_scan(sm->dev); +} + +void +ieee80211softmac_wait_for_scan(struct ieee80211softmac_device *sm) +{ + unsigned long flags; + + spin_lock_irqsave(&sm->lock, flags); + + if (!sm->scanning) { + spin_unlock_irqrestore(&sm->lock, flags); + return; + } + + spin_unlock_irqrestore(&sm->lock, flags); + sm->wait_for_scan(sm->dev); +} + + +/* internal scanning implementation follows */ +void ieee80211softmac_scan(void *d) +{ + int invalid_channel; + u8 current_channel_idx; + struct ieee80211softmac_device *sm = (struct ieee80211softmac_device *)d; + struct ieee80211softmac_scaninfo *si = sm->scaninfo; + unsigned long flags; + + while (!(si->stop) && (si->current_channel_idx < si->number_channels)) { + current_channel_idx = si->current_channel_idx; + si->current_channel_idx++; /* go to the next channel */ + + invalid_channel = (si->skip_flags & si->channels[current_channel_idx].flags); + + if (!invalid_channel) { + sm->set_channel(sm->dev, si->channels[current_channel_idx].channel); + //TODO: Probe the channel + // FIXME make this user configurable (active/passive) + if(ieee80211softmac_send_mgt_frame(sm, NULL, IEEE80211_STYPE_PROBE_REQ, 0)) + printkl(KERN_DEBUG PFX "Sending Probe Request Failed\n"); + + /* also send directed management frame for the network we're looking for */ + // TODO: is this if correct, or should we do this only if scanning from assoc request? + if (sm->associnfo.req_essid.len) + ieee80211softmac_send_mgt_frame(sm, &sm->associnfo.req_essid, IEEE80211_STYPE_PROBE_REQ, 0); + queue_delayed_work(sm->workqueue, &si->softmac_scan, IEEE80211SOFTMAC_PROBE_DELAY); + return; + } else { + dprintk(PFX "Not probing Channel %d (not allowed here)\n", si->channels[current_channel_idx].channel); + } + } + + spin_lock_irqsave(&sm->lock, flags); + cancel_delayed_work(&si->softmac_scan); + si->started = 0; + spin_unlock_irqrestore(&sm->lock, flags); + + dprintk(PFX "Scanning finished\n"); + ieee80211softmac_scan_finished(sm); + complete_all(&sm->scaninfo->finished); +} + +static inline struct ieee80211softmac_scaninfo *allocate_scaninfo(struct ieee80211softmac_device *mac) +{ + /* ugh. can we call this without having the spinlock held? */ + struct ieee80211softmac_scaninfo *info = kmalloc(sizeof(struct ieee80211softmac_scaninfo), GFP_ATOMIC); + if (unlikely(!info)) + return NULL; + INIT_WORK(&info->softmac_scan, ieee80211softmac_scan, mac); + init_completion(&info->finished); + return info; +} + +int ieee80211softmac_start_scan_implementation(struct net_device *dev) +{ + struct ieee80211softmac_device *sm = ieee80211_priv(dev); + unsigned long flags; + + if (!(dev->flags & IFF_UP)) + return -ENODEV; + + assert(ieee80211softmac_scan_handlers_check_self(sm)); + if (!ieee80211softmac_scan_handlers_check_self(sm)) + return -EINVAL; + + spin_lock_irqsave(&sm->lock, flags); + /* it looks like we need to hold the lock here + * to make sure we don't allocate two of these... */ + if (unlikely(!sm->scaninfo)) + sm->scaninfo = allocate_scaninfo(sm); + if (unlikely(!sm->scaninfo)) { + spin_unlock_irqrestore(&sm->lock, flags); + return -ENOMEM; + } + + sm->scaninfo->skip_flags = IEEE80211_CH_INVALID; + if (0 /* not scanning in IEEE802.11b */)//TODO + sm->scaninfo->skip_flags |= IEEE80211_CH_B_ONLY; + if (0 /* IEEE802.11a */) {//TODO + sm->scaninfo->channels = sm->ieee->geo.a; + sm->scaninfo->number_channels = sm->ieee->geo.a_channels; + } else { + sm->scaninfo->channels = sm->ieee->geo.bg; + sm->scaninfo->number_channels = sm->ieee->geo.bg_channels; + } + dprintk(PFX "Start scanning with channel: %d\n", sm->scaninfo->channels[0].channel); + dprintk(PFX "Scanning %d channels\n", sm->scaninfo->number_channels); + sm->scaninfo->current_channel_idx = 0; + sm->scaninfo->started = 1; + INIT_COMPLETION(sm->scaninfo->finished); + queue_work(sm->workqueue, &sm->scaninfo->softmac_scan); + spin_unlock_irqrestore(&sm->lock, flags); + return 0; +} + +void ieee80211softmac_stop_scan_implementation(struct net_device *dev) +{ + struct ieee80211softmac_device *sm = ieee80211_priv(dev); + unsigned long flags; + + assert(ieee80211softmac_scan_handlers_check_self(sm)); + if (!ieee80211softmac_scan_handlers_check_self(sm)) + return; + + spin_lock_irqsave(&sm->lock, flags); + assert(sm->scaninfo != NULL); + if (sm->scaninfo) { + if (sm->scaninfo->started) + sm->scaninfo->stop = 1; + else + complete_all(&sm->scaninfo->finished); + } + spin_unlock_irqrestore(&sm->lock, flags); +} + +void ieee80211softmac_wait_for_scan_implementation(struct net_device *dev) +{ + struct ieee80211softmac_device *sm = ieee80211_priv(dev); + unsigned long flags; + + assert(ieee80211softmac_scan_handlers_check_self(sm)); + if (!ieee80211softmac_scan_handlers_check_self(sm)) + return; + + spin_lock_irqsave(&sm->lock, flags); + if (!sm->scaninfo->started) { + spin_unlock_irqrestore(&sm->lock, flags); + return; + } + spin_unlock_irqrestore(&sm->lock, flags); + wait_for_completion(&sm->scaninfo->finished); +} + +/* this is what drivers (that do scanning) call when they're done */ +void ieee80211softmac_scan_finished(struct ieee80211softmac_device *sm) +{ + unsigned long flags; + + spin_lock_irqsave(&sm->lock, flags); + sm->scanning = 0; + spin_unlock_irqrestore(&sm->lock, flags); + + ieee80211softmac_call_events(sm, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, NULL); +} + +EXPORT_SYMBOL_GPL(ieee80211softmac_scan_finished); diff --git a/net/ieee80211/softmac/ieee80211softmac_wx.c b/net/ieee80211/softmac/ieee80211softmac_wx.c new file mode 100644 index 00000000000..bae5fcc1196 --- /dev/null +++ b/net/ieee80211/softmac/ieee80211softmac_wx.c @@ -0,0 +1,390 @@ +/* + * This file contains our _wx handlers. Make sure you EXPORT_SYMBOL_GPL them + */ + +#include "ieee80211softmac_priv.h" + +#include <net/iw_handler.h> + + +int +ieee80211softmac_wx_trigger_scan(struct net_device *net_dev, + struct iw_request_info *info, + union iwreq_data *data, + char *extra) +{ + struct ieee80211softmac_device *sm = ieee80211_priv(net_dev); + return ieee80211softmac_start_scan(sm); +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_trigger_scan); + + +int +ieee80211softmac_wx_get_scan_results(struct net_device *net_dev, + struct iw_request_info *info, + union iwreq_data *data, + char *extra) +{ + struct ieee80211softmac_device *sm = ieee80211_priv(net_dev); + return ieee80211_wx_get_scan(sm->ieee, info, data, extra); +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_scan_results); + +int +ieee80211softmac_wx_set_essid(struct net_device *net_dev, + struct iw_request_info *info, + union iwreq_data *data, + char *extra) +{ + struct ieee80211softmac_device *sm = ieee80211_priv(net_dev); + int length = 0; + unsigned long flags; + + spin_lock_irqsave(&sm->lock, flags); + + sm->associnfo.static_essid = 0; + + if (data->essid.flags && data->essid.length && extra /*required?*/) { + length = min(data->essid.length - 1, IW_ESSID_MAX_SIZE); + if (length) { + memcpy(sm->associnfo.req_essid.data, extra, length); + sm->associnfo.static_essid = 1; + } + } + sm->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT; + + /* set our requested ESSID length. + * If applicable, we have already copied the data in */ + sm->associnfo.req_essid.len = length; + + /* queue lower level code to do work (if necessary) */ + queue_work(sm->workqueue, &sm->associnfo.work); + + spin_unlock_irqrestore(&sm->lock, flags); + return 0; +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_essid); + +int +ieee80211softmac_wx_get_essid(struct net_device *net_dev, + struct iw_request_info *info, + union iwreq_data *data, + char *extra) +{ + struct ieee80211softmac_device *sm = ieee80211_priv(net_dev); + unsigned long flags; + + /* avoid getting inconsistent information */ + spin_lock_irqsave(&sm->lock, flags); + /* If all fails, return ANY (empty) */ + data->essid.length = 0; + data->essid.flags = 0; /* active */ + + /* If we have a statically configured ESSID then return it */ + if (sm->associnfo.static_essid) { + data->essid.length = sm->associnfo.req_essid.len; + data->essid.flags = 1; /* active */ + memcpy(extra, sm->associnfo.req_essid.data, sm->associnfo.req_essid.len); + } + + /* If we're associating/associated, return that */ + if (sm->associated || sm->associnfo.associating) { + data->essid.length = sm->associnfo.associate_essid.len; + data->essid.flags = 1; /* active */ + memcpy(extra, sm->associnfo.associate_essid.data, sm->associnfo.associate_essid.len); + } + spin_unlock_irqrestore(&sm->lock, flags); + return 0; +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_essid); + +int +ieee80211softmac_wx_set_rate(struct net_device *net_dev, + struct iw_request_info *info, + union iwreq_data *data, + char *extra) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(net_dev); + struct ieee80211_device *ieee = mac->ieee; + unsigned long flags; + s32 in_rate = data->bitrate.value; + u8 rate; + int is_ofdm = 0; + int err = -EINVAL; + + if (in_rate == -1) { + /* automatic detect */ + if (ieee->modulation & IEEE80211_OFDM_MODULATION) + in_rate = 54000000; + else + in_rate = 11000000; + } + + switch (in_rate) { + case 1000000: + rate = IEEE80211_CCK_RATE_1MB; + break; + case 2000000: + rate = IEEE80211_CCK_RATE_2MB; + break; + case 5500000: + rate = IEEE80211_CCK_RATE_5MB; + break; + case 11000000: + rate = IEEE80211_CCK_RATE_11MB; + break; + case 6000000: + rate = IEEE80211_OFDM_RATE_6MB; + is_ofdm = 1; + break; + case 9000000: + rate = IEEE80211_OFDM_RATE_9MB; + is_ofdm = 1; + break; + case 12000000: + rate = IEEE80211_OFDM_RATE_12MB; + is_ofdm = 1; + break; + case 18000000: + rate = IEEE80211_OFDM_RATE_18MB; + is_ofdm = 1; + break; + case 24000000: + rate = IEEE80211_OFDM_RATE_24MB; + is_ofdm = 1; + break; + case 36000000: + rate = IEEE80211_OFDM_RATE_36MB; + is_ofdm = 1; + break; + case 48000000: + rate = IEEE80211_OFDM_RATE_48MB; + is_ofdm = 1; + break; + case 54000000: + rate = IEEE80211_OFDM_RATE_54MB; + is_ofdm = 1; + break; + default: + goto out; + } + + spin_lock_irqsave(&mac->lock, flags); + + /* Check if correct modulation for this PHY. */ + if (is_ofdm && !(ieee->modulation & IEEE80211_OFDM_MODULATION)) + goto out_unlock; + + mac->txrates.default_rate = rate; + mac->txrates.default_fallback = lower_rate(mac, rate); + err = 0; + +out_unlock: + spin_unlock_irqrestore(&mac->lock, flags); +out: + return err; +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_rate); + +int +ieee80211softmac_wx_get_rate(struct net_device *net_dev, + struct iw_request_info *info, + union iwreq_data *data, + char *extra) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(net_dev); + unsigned long flags; + int err = -EINVAL; + + spin_lock_irqsave(&mac->lock, flags); + switch (mac->txrates.default_rate) { + case IEEE80211_CCK_RATE_1MB: + data->bitrate.value = 1000000; + break; + case IEEE80211_CCK_RATE_2MB: + data->bitrate.value = 2000000; + break; + case IEEE80211_CCK_RATE_5MB: + data->bitrate.value = 5500000; + break; + case IEEE80211_CCK_RATE_11MB: + data->bitrate.value = 11000000; + break; + case IEEE80211_OFDM_RATE_6MB: + data->bitrate.value = 6000000; + break; + case IEEE80211_OFDM_RATE_9MB: + data->bitrate.value = 9000000; + break; + case IEEE80211_OFDM_RATE_12MB: + data->bitrate.value = 12000000; + break; + case IEEE80211_OFDM_RATE_18MB: + data->bitrate.value = 18000000; + break; + case IEEE80211_OFDM_RATE_24MB: + data->bitrate.value = 24000000; + break; + case IEEE80211_OFDM_RATE_36MB: + data->bitrate.value = 36000000; + break; + case IEEE80211_OFDM_RATE_48MB: + data->bitrate.value = 48000000; + break; + case IEEE80211_OFDM_RATE_54MB: + data->bitrate.value = 54000000; + break; + default: + assert(0); + goto out_unlock; + } + err = 0; +out_unlock: + spin_unlock_irqrestore(&mac->lock, flags); + + return err; +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_rate); + +int +ieee80211softmac_wx_get_wap(struct net_device *net_dev, + struct iw_request_info *info, + union iwreq_data *data, + char *extra) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(net_dev); + int err = 0; + unsigned long flags; + + spin_lock_irqsave(&mac->lock, flags); + if (mac->associnfo.bssvalid) + memcpy(data->ap_addr.sa_data, mac->associnfo.bssid, ETH_ALEN); + else + memset(data->ap_addr.sa_data, 0xff, ETH_ALEN); + data->ap_addr.sa_family = ARPHRD_ETHER; + spin_unlock_irqrestore(&mac->lock, flags); + return err; +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_wap); + +int +ieee80211softmac_wx_set_wap(struct net_device *net_dev, + struct iw_request_info *info, + union iwreq_data *data, + char *extra) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(net_dev); + static const unsigned char any[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; + static const unsigned char off[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; + unsigned long flags; + + /* sanity check */ + if (data->ap_addr.sa_family != ARPHRD_ETHER) { + return -EINVAL; + } + + spin_lock_irqsave(&mac->lock, flags); + if (!memcmp(any, data->ap_addr.sa_data, ETH_ALEN) || + !memcmp(off, data->ap_addr.sa_data, ETH_ALEN)) { + queue_work(mac->workqueue, &mac->associnfo.work); + goto out; + } else { + if (!memcmp(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN)) { + if (mac->associnfo.associating || mac->associated) { + /* bssid unchanged and associated or associating - just return */ + goto out; + } + } else { + /* copy new value in data->ap_addr.sa_data to bssid */ + memcpy(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN); + } + /* queue associate if new bssid or (old one again and not associated) */ + queue_work(mac->workqueue,&mac->associnfo.work); + } + +out: + spin_unlock_irqrestore(&mac->lock, flags); + return 0; +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_wap); + +int +ieee80211softmac_wx_set_genie(struct net_device *dev, + struct iw_request_info *info, + union iwreq_data *wrqu, + char *extra) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + unsigned long flags; + int err = 0; + char *buf; + int i; + + spin_lock_irqsave(&mac->lock, flags); + /* bleh. shouldn't be locked for that kmalloc... */ + + if (wrqu->data.length) { + if ((wrqu->data.length < 2) || (extra[1]+2 != wrqu->data.length)) { + /* this is an IE, so the length must be + * correct. Is it possible though that + * more than one IE is passed in? + */ + err = -EINVAL; + goto out; + } + if (mac->wpa.IEbuflen <= wrqu->data.length) { + buf = kmalloc(wrqu->data.length, GFP_ATOMIC); + if (!buf) { + err = -ENOMEM; + goto out; + } + kfree(mac->wpa.IE); + mac->wpa.IE = buf; + mac->wpa.IEbuflen = wrqu->data.length; + } + memcpy(mac->wpa.IE, extra, wrqu->data.length); + dprintk(KERN_INFO PFX "generic IE set to "); + for (i=0;i<wrqu->data.length;i++) + dprintk("%.2x", mac->wpa.IE[i]); + dprintk("\n"); + mac->wpa.IElen = wrqu->data.length; + } else { + kfree(mac->wpa.IE); + mac->wpa.IE = NULL; + mac->wpa.IElen = 0; + mac->wpa.IEbuflen = 0; + } + + out: + spin_unlock_irqrestore(&mac->lock, flags); + return err; +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_genie); + +int +ieee80211softmac_wx_get_genie(struct net_device *dev, + struct iw_request_info *info, + union iwreq_data *wrqu, + char *extra) +{ + struct ieee80211softmac_device *mac = ieee80211_priv(dev); + unsigned long flags; + int err = 0; + int space = wrqu->data.length; + + spin_lock_irqsave(&mac->lock, flags); + + wrqu->data.length = 0; + + if (mac->wpa.IE && mac->wpa.IElen) { + wrqu->data.length = mac->wpa.IElen; + if (mac->wpa.IElen <= space) + memcpy(extra, mac->wpa.IE, mac->wpa.IElen); + else + err = -E2BIG; + } + spin_unlock_irqrestore(&mac->lock, flags); + return err; +} +EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_genie); + |