| /* src/p80211/p80211knetdev.c |
| * |
| * Linux Kernel net device interface |
| * |
| * Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved. |
| * -------------------------------------------------------------------- |
| * |
| * linux-wlan |
| * |
| * The contents of this file are subject to the Mozilla Public |
| * License Version 1.1 (the "License"); you may not use this file |
| * except in compliance with the License. You may obtain a copy of |
| * the License at http://www.mozilla.org/MPL/ |
| * |
| * Software distributed under the License is distributed on an "AS |
| * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or |
| * implied. See the License for the specific language governing |
| * rights and limitations under the License. |
| * |
| * Alternatively, the contents of this file may be used under the |
| * terms of the GNU Public License version 2 (the "GPL"), in which |
| * case the provisions of the GPL are applicable instead of the |
| * above. If you wish to allow the use of your version of this file |
| * only under the terms of the GPL and not to allow others to use |
| * your version of this file under the MPL, indicate your decision |
| * by deleting the provisions above and replace them with the notice |
| * and other provisions required by the GPL. If you do not delete |
| * the provisions above, a recipient may use your version of this |
| * file under either the MPL or the GPL. |
| * |
| * -------------------------------------------------------------------- |
| * |
| * Inquiries regarding the linux-wlan Open Source project can be |
| * made directly to: |
| * |
| * AbsoluteValue Systems Inc. |
| * info@linux-wlan.com |
| * http://www.linux-wlan.com |
| * |
| * -------------------------------------------------------------------- |
| * |
| * Portions of the development of this software were funded by |
| * Intersil Corporation as part of PRISM(R) chipset product development. |
| * |
| * -------------------------------------------------------------------- |
| * |
| * The functions required for a Linux network device are defined here. |
| * |
| * -------------------------------------------------------------------- |
| */ |
| |
| #include <linux/version.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/types.h> |
| #include <linux/skbuff.h> |
| #include <linux/slab.h> |
| #include <linux/proc_fs.h> |
| #include <linux/interrupt.h> |
| #include <linux/netdevice.h> |
| #include <linux/kmod.h> |
| #include <linux/if_arp.h> |
| #include <linux/wireless.h> |
| #include <linux/sockios.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if_ether.h> |
| #include <linux/byteorder/generic.h> |
| #include <linux/bitops.h> |
| #include <linux/uaccess.h> |
| #include <asm/byteorder.h> |
| |
| #ifdef SIOCETHTOOL |
| #include <linux/ethtool.h> |
| #endif |
| |
| #include <net/iw_handler.h> |
| #include <net/net_namespace.h> |
| |
| /*================================================================*/ |
| /* Project Includes */ |
| |
| #include "p80211types.h" |
| #include "p80211hdr.h" |
| #include "p80211conv.h" |
| #include "p80211mgmt.h" |
| #include "p80211msg.h" |
| #include "p80211netdev.h" |
| #include "p80211ioctl.h" |
| #include "p80211req.h" |
| #include "p80211metastruct.h" |
| #include "p80211metadef.h" |
| |
| /* Support functions */ |
| static void p80211netdev_rx_bh(unsigned long arg); |
| |
| /* netdevice method functions */ |
| static int p80211knetdev_init(netdevice_t *netdev); |
| static struct net_device_stats *p80211knetdev_get_stats(netdevice_t *netdev); |
| static int p80211knetdev_open(netdevice_t *netdev); |
| static int p80211knetdev_stop(netdevice_t *netdev); |
| static int p80211knetdev_hard_start_xmit(struct sk_buff *skb, |
| netdevice_t *netdev); |
| static void p80211knetdev_set_multicast_list(netdevice_t *dev); |
| static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr, |
| int cmd); |
| static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr); |
| static void p80211knetdev_tx_timeout(netdevice_t *netdev); |
| static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc); |
| |
| int wlan_watchdog = 5000; |
| module_param(wlan_watchdog, int, 0644); |
| MODULE_PARM_DESC(wlan_watchdog, "transmit timeout in milliseconds"); |
| |
| int wlan_wext_write = 1; |
| module_param(wlan_wext_write, int, 0644); |
| MODULE_PARM_DESC(wlan_wext_write, "enable write wireless extensions"); |
| |
| /*---------------------------------------------------------------- |
| * p80211knetdev_init |
| * |
| * Init method for a Linux netdevice. Called in response to |
| * register_netdev. |
| * |
| * Arguments: |
| * none |
| * |
| * Returns: |
| * nothing |
| ----------------------------------------------------------------*/ |
| static int p80211knetdev_init(netdevice_t *netdev) |
| { |
| /* Called in response to register_netdev */ |
| /* This is usually the probe function, but the probe has */ |
| /* already been done by the MSD and the create_kdev */ |
| /* function. All we do here is return success */ |
| return 0; |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211knetdev_get_stats |
| * |
| * Statistics retrieval for linux netdevices. Here we're reporting |
| * the Linux i/f level statistics. Hence, for the primary numbers, |
| * we don't want to report the numbers from the MIB. Eventually, |
| * it might be useful to collect some of the error counters though. |
| * |
| * Arguments: |
| * netdev Linux netdevice |
| * |
| * Returns: |
| * the address of the statistics structure |
| ----------------------------------------------------------------*/ |
| static struct net_device_stats *p80211knetdev_get_stats(netdevice_t *netdev) |
| { |
| wlandevice_t *wlandev = netdev->ml_priv; |
| |
| /* TODO: review the MIB stats for items that correspond to |
| linux stats */ |
| |
| return &(wlandev->linux_stats); |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211knetdev_open |
| * |
| * Linux netdevice open method. Following a successful call here, |
| * the device is supposed to be ready for tx and rx. In our |
| * situation that may not be entirely true due to the state of the |
| * MAC below. |
| * |
| * Arguments: |
| * netdev Linux network device structure |
| * |
| * Returns: |
| * zero on success, non-zero otherwise |
| ----------------------------------------------------------------*/ |
| static int p80211knetdev_open(netdevice_t *netdev) |
| { |
| int result = 0; /* success */ |
| wlandevice_t *wlandev = netdev->ml_priv; |
| |
| /* Check to make sure the MSD is running */ |
| if (wlandev->msdstate != WLAN_MSD_RUNNING) |
| return -ENODEV; |
| |
| /* Tell the MSD to open */ |
| if (wlandev->open != NULL) { |
| result = wlandev->open(wlandev); |
| if (result == 0) { |
| netif_start_queue(wlandev->netdev); |
| wlandev->state = WLAN_DEVICE_OPEN; |
| } |
| } else { |
| result = -EAGAIN; |
| } |
| |
| return result; |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211knetdev_stop |
| * |
| * Linux netdevice stop (close) method. Following this call, |
| * no frames should go up or down through this interface. |
| * |
| * Arguments: |
| * netdev Linux network device structure |
| * |
| * Returns: |
| * zero on success, non-zero otherwise |
| ----------------------------------------------------------------*/ |
| static int p80211knetdev_stop(netdevice_t *netdev) |
| { |
| int result = 0; |
| wlandevice_t *wlandev = netdev->ml_priv; |
| |
| if (wlandev->close != NULL) |
| result = wlandev->close(wlandev); |
| |
| netif_stop_queue(wlandev->netdev); |
| wlandev->state = WLAN_DEVICE_CLOSED; |
| |
| return result; |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211netdev_rx |
| * |
| * Frame receive function called by the mac specific driver. |
| * |
| * Arguments: |
| * wlandev WLAN network device structure |
| * skb skbuff containing a full 802.11 frame. |
| * Returns: |
| * nothing |
| * Side effects: |
| * |
| ----------------------------------------------------------------*/ |
| void p80211netdev_rx(wlandevice_t *wlandev, struct sk_buff *skb) |
| { |
| /* Enqueue for post-irq processing */ |
| skb_queue_tail(&wlandev->nsd_rxq, skb); |
| |
| tasklet_schedule(&wlandev->rx_bh); |
| |
| return; |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211netdev_rx_bh |
| * |
| * Deferred processing of all received frames. |
| * |
| * Arguments: |
| * wlandev WLAN network device structure |
| * skb skbuff containing a full 802.11 frame. |
| * Returns: |
| * nothing |
| * Side effects: |
| * |
| ----------------------------------------------------------------*/ |
| static void p80211netdev_rx_bh(unsigned long arg) |
| { |
| wlandevice_t *wlandev = (wlandevice_t *) arg; |
| struct sk_buff *skb = NULL; |
| netdevice_t *dev = wlandev->netdev; |
| p80211_hdr_a3_t *hdr; |
| u16 fc; |
| |
| /* Let's empty our our queue */ |
| while ((skb = skb_dequeue(&wlandev->nsd_rxq))) { |
| if (wlandev->state == WLAN_DEVICE_OPEN) { |
| |
| if (dev->type != ARPHRD_ETHER) { |
| /* RAW frame; we shouldn't convert it */ |
| /* XXX Append the Prism Header here instead. */ |
| |
| /* set up various data fields */ |
| skb->dev = dev; |
| skb_reset_mac_header(skb); |
| skb->ip_summed = CHECKSUM_NONE; |
| skb->pkt_type = PACKET_OTHERHOST; |
| skb->protocol = htons(ETH_P_80211_RAW); |
| dev->last_rx = jiffies; |
| |
| wlandev->linux_stats.rx_packets++; |
| wlandev->linux_stats.rx_bytes += skb->len; |
| netif_rx_ni(skb); |
| continue; |
| } else { |
| hdr = (p80211_hdr_a3_t *) skb->data; |
| fc = le16_to_cpu(hdr->fc); |
| if (p80211_rx_typedrop(wlandev, fc)) { |
| dev_kfree_skb(skb); |
| continue; |
| } |
| |
| /* perform mcast filtering */ |
| if (wlandev->netdev->flags & IFF_ALLMULTI) { |
| /* allow my local address through */ |
| if (memcmp |
| (hdr->a1, wlandev->netdev->dev_addr, |
| ETH_ALEN) != 0) { |
| /* but reject anything else that isn't multicast */ |
| if (!(hdr->a1[0] & 0x01)) { |
| dev_kfree_skb(skb); |
| continue; |
| } |
| } |
| } |
| |
| if (skb_p80211_to_ether |
| (wlandev, wlandev->ethconv, skb) == 0) { |
| skb->dev->last_rx = jiffies; |
| wlandev->linux_stats.rx_packets++; |
| wlandev->linux_stats.rx_bytes += |
| skb->len; |
| netif_rx_ni(skb); |
| continue; |
| } |
| pr_debug("p80211_to_ether failed.\n"); |
| } |
| } |
| dev_kfree_skb(skb); |
| } |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211knetdev_hard_start_xmit |
| * |
| * Linux netdevice method for transmitting a frame. |
| * |
| * Arguments: |
| * skb Linux sk_buff containing the frame. |
| * netdev Linux netdevice. |
| * |
| * Side effects: |
| * If the lower layers report that buffers are full. netdev->tbusy |
| * will be set to prevent higher layers from sending more traffic. |
| * |
| * Note: If this function returns non-zero, higher layers retain |
| * ownership of the skb. |
| * |
| * Returns: |
| * zero on success, non-zero on failure. |
| ----------------------------------------------------------------*/ |
| static int p80211knetdev_hard_start_xmit(struct sk_buff *skb, |
| netdevice_t *netdev) |
| { |
| int result = 0; |
| int txresult = -1; |
| wlandevice_t *wlandev = netdev->ml_priv; |
| p80211_hdr_t p80211_hdr; |
| p80211_metawep_t p80211_wep; |
| |
| if (skb == NULL) |
| return 0; |
| |
| if (wlandev->state != WLAN_DEVICE_OPEN) { |
| result = 1; |
| goto failed; |
| } |
| |
| memset(&p80211_hdr, 0, sizeof(p80211_hdr_t)); |
| memset(&p80211_wep, 0, sizeof(p80211_metawep_t)); |
| |
| if (netif_queue_stopped(netdev)) { |
| pr_debug("called when queue stopped.\n"); |
| result = 1; |
| goto failed; |
| } |
| |
| netif_stop_queue(netdev); |
| |
| /* Check to see that a valid mode is set */ |
| switch (wlandev->macmode) { |
| case WLAN_MACMODE_IBSS_STA: |
| case WLAN_MACMODE_ESS_STA: |
| case WLAN_MACMODE_ESS_AP: |
| break; |
| default: |
| /* Mode isn't set yet, just drop the frame |
| * and return success . |
| * TODO: we need a saner way to handle this |
| */ |
| if (skb->protocol != ETH_P_80211_RAW) { |
| netif_start_queue(wlandev->netdev); |
| printk(KERN_NOTICE |
| "Tx attempt prior to association, frame dropped.\n"); |
| wlandev->linux_stats.tx_dropped++; |
| result = 0; |
| goto failed; |
| } |
| break; |
| } |
| |
| /* Check for raw transmits */ |
| if (skb->protocol == ETH_P_80211_RAW) { |
| if (!capable(CAP_NET_ADMIN)) { |
| result = 1; |
| goto failed; |
| } |
| /* move the header over */ |
| memcpy(&p80211_hdr, skb->data, sizeof(p80211_hdr_t)); |
| skb_pull(skb, sizeof(p80211_hdr_t)); |
| } else { |
| if (skb_ether_to_p80211 |
| (wlandev, wlandev->ethconv, skb, &p80211_hdr, |
| &p80211_wep) != 0) { |
| /* convert failed */ |
| pr_debug("ether_to_80211(%d) failed.\n", |
| wlandev->ethconv); |
| result = 1; |
| goto failed; |
| } |
| } |
| if (wlandev->txframe == NULL) { |
| result = 1; |
| goto failed; |
| } |
| |
| netdev->trans_start = jiffies; |
| |
| wlandev->linux_stats.tx_packets++; |
| /* count only the packet payload */ |
| wlandev->linux_stats.tx_bytes += skb->len; |
| |
| txresult = wlandev->txframe(wlandev, skb, &p80211_hdr, &p80211_wep); |
| |
| if (txresult == 0) { |
| /* success and more buf */ |
| /* avail, re: hw_txdata */ |
| netif_wake_queue(wlandev->netdev); |
| result = NETDEV_TX_OK; |
| } else if (txresult == 1) { |
| /* success, no more avail */ |
| pr_debug("txframe success, no more bufs\n"); |
| /* netdev->tbusy = 1; don't set here, irqhdlr */ |
| /* may have already cleared it */ |
| result = NETDEV_TX_OK; |
| } else if (txresult == 2) { |
| /* alloc failure, drop frame */ |
| pr_debug("txframe returned alloc_fail\n"); |
| result = NETDEV_TX_BUSY; |
| } else { |
| /* buffer full or queue busy, drop frame. */ |
| pr_debug("txframe returned full or busy\n"); |
| result = NETDEV_TX_BUSY; |
| } |
| |
| failed: |
| /* Free up the WEP buffer if it's not the same as the skb */ |
| if ((p80211_wep.data) && (p80211_wep.data != skb->data)) |
| kfree(p80211_wep.data); |
| |
| /* we always free the skb here, never in a lower level. */ |
| if (!result) |
| dev_kfree_skb(skb); |
| |
| return result; |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211knetdev_set_multicast_list |
| * |
| * Called from higher lavers whenever there's a need to set/clear |
| * promiscuous mode or rewrite the multicast list. |
| * |
| * Arguments: |
| * none |
| * |
| * Returns: |
| * nothing |
| ----------------------------------------------------------------*/ |
| static void p80211knetdev_set_multicast_list(netdevice_t *dev) |
| { |
| wlandevice_t *wlandev = dev->ml_priv; |
| |
| /* TODO: real multicast support as well */ |
| |
| if (wlandev->set_multicast_list) |
| wlandev->set_multicast_list(wlandev, dev); |
| |
| } |
| |
| #ifdef SIOCETHTOOL |
| |
| static int p80211netdev_ethtool(wlandevice_t *wlandev, void __user *useraddr) |
| { |
| u32 ethcmd; |
| struct ethtool_drvinfo info; |
| struct ethtool_value edata; |
| |
| memset(&info, 0, sizeof(info)); |
| memset(&edata, 0, sizeof(edata)); |
| |
| if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) |
| return -EFAULT; |
| |
| switch (ethcmd) { |
| case ETHTOOL_GDRVINFO: |
| info.cmd = ethcmd; |
| snprintf(info.driver, sizeof(info.driver), "p80211_%s", |
| wlandev->nsdname); |
| snprintf(info.version, sizeof(info.version), "%s", |
| WLAN_RELEASE); |
| |
| if (copy_to_user(useraddr, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| #ifdef ETHTOOL_GLINK |
| case ETHTOOL_GLINK: |
| edata.cmd = ethcmd; |
| |
| if (wlandev->linkstatus && |
| (wlandev->macmode != WLAN_MACMODE_NONE)) { |
| edata.data = 1; |
| } else { |
| edata.data = 0; |
| } |
| |
| if (copy_to_user(useraddr, &edata, sizeof(edata))) |
| return -EFAULT; |
| return 0; |
| } |
| #endif |
| |
| return -EOPNOTSUPP; |
| } |
| |
| #endif |
| |
| /*---------------------------------------------------------------- |
| * p80211knetdev_do_ioctl |
| * |
| * Handle an ioctl call on one of our devices. Everything Linux |
| * ioctl specific is done here. Then we pass the contents of the |
| * ifr->data to the request message handler. |
| * |
| * Arguments: |
| * dev Linux kernel netdevice |
| * ifr Our private ioctl request structure, typed for the |
| * generic struct ifreq so we can use ptr to func |
| * w/o cast. |
| * |
| * Returns: |
| * zero on success, a negative errno on failure. Possible values: |
| * -ENETDOWN Device isn't up. |
| * -EBUSY cmd already in progress |
| * -ETIME p80211 cmd timed out (MSD may have its own timers) |
| * -EFAULT memory fault copying msg from user buffer |
| * -ENOMEM unable to allocate kernel msg buffer |
| * -ENOSYS bad magic, it the cmd really for us? |
| * -EintR sleeping on cmd, awakened by signal, cmd cancelled. |
| * |
| * Call Context: |
| * Process thread (ioctl caller). TODO: SMP support may require |
| * locks. |
| ----------------------------------------------------------------*/ |
| static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr, int cmd) |
| { |
| int result = 0; |
| p80211ioctl_req_t *req = (p80211ioctl_req_t *) ifr; |
| wlandevice_t *wlandev = dev->ml_priv; |
| u8 *msgbuf; |
| |
| pr_debug("rx'd ioctl, cmd=%d, len=%d\n", cmd, req->len); |
| |
| mutex_lock(&wlandev->ioctl_lock); |
| |
| #ifdef SIOCETHTOOL |
| if (cmd == SIOCETHTOOL) { |
| result = |
| p80211netdev_ethtool(wlandev, (void __user *)ifr->ifr_data); |
| goto bail; |
| } |
| #endif |
| |
| /* Test the magic, assume ifr is good if it's there */ |
| if (req->magic != P80211_IOCTL_MAGIC) { |
| result = -ENOSYS; |
| goto bail; |
| } |
| |
| if (cmd == P80211_IFTEST) { |
| result = 0; |
| goto bail; |
| } else if (cmd != P80211_IFREQ) { |
| result = -ENOSYS; |
| goto bail; |
| } |
| |
| /* Allocate a buf of size req->len */ |
| if ((msgbuf = kmalloc(req->len, GFP_KERNEL))) { |
| if (copy_from_user(msgbuf, (void __user *)req->data, req->len)) |
| result = -EFAULT; |
| else |
| result = p80211req_dorequest(wlandev, msgbuf); |
| |
| if (result == 0) { |
| if (copy_to_user |
| ((void __user *)req->data, msgbuf, req->len)) { |
| result = -EFAULT; |
| } |
| } |
| kfree(msgbuf); |
| } else { |
| result = -ENOMEM; |
| } |
| bail: |
| mutex_unlock(&wlandev->ioctl_lock); |
| |
| return result; /* If allocate,copyfrom or copyto fails, return errno */ |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211knetdev_set_mac_address |
| * |
| * Handles the ioctl for changing the MACAddress of a netdevice |
| * |
| * references: linux/netdevice.h and drivers/net/net_init.c |
| * |
| * NOTE: [MSM] We only prevent address changes when the netdev is |
| * up. We don't control anything based on dot11 state. If the |
| * address is changed on a STA that's currently associated, you |
| * will probably lose the ability to send and receive data frames. |
| * Just be aware. Therefore, this should usually only be done |
| * prior to scan/join/auth/assoc. |
| * |
| * Arguments: |
| * dev netdevice struct |
| * addr the new MACAddress (a struct) |
| * |
| * Returns: |
| * zero on success, a negative errno on failure. Possible values: |
| * -EBUSY device is bussy (cmd not possible) |
| * -and errors returned by: p80211req_dorequest(..) |
| * |
| * by: Collin R. Mulliner <collin@mulliner.org> |
| ----------------------------------------------------------------*/ |
| static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr) |
| { |
| struct sockaddr *new_addr = addr; |
| p80211msg_dot11req_mibset_t dot11req; |
| p80211item_unk392_t *mibattr; |
| p80211item_pstr6_t *macaddr; |
| p80211item_uint32_t *resultcode; |
| int result = 0; |
| |
| /* If we're running, we don't allow MAC address changes */ |
| if (netif_running(dev)) |
| return -EBUSY; |
| |
| /* Set up some convenience pointers. */ |
| mibattr = &dot11req.mibattribute; |
| macaddr = (p80211item_pstr6_t *)&mibattr->data; |
| resultcode = &dot11req.resultcode; |
| |
| /* Set up a dot11req_mibset */ |
| memset(&dot11req, 0, sizeof(p80211msg_dot11req_mibset_t)); |
| dot11req.msgcode = DIDmsg_dot11req_mibset; |
| dot11req.msglen = sizeof(p80211msg_dot11req_mibset_t); |
| memcpy(dot11req.devname, |
| ((wlandevice_t *) dev->ml_priv)->name, WLAN_DEVNAMELEN_MAX - 1); |
| |
| /* Set up the mibattribute argument */ |
| mibattr->did = DIDmsg_dot11req_mibset_mibattribute; |
| mibattr->status = P80211ENUM_msgitem_status_data_ok; |
| mibattr->len = sizeof(mibattr->data); |
| |
| macaddr->did = DIDmib_dot11mac_dot11OperationTable_dot11MACAddress; |
| macaddr->status = P80211ENUM_msgitem_status_data_ok; |
| macaddr->len = sizeof(macaddr->data); |
| macaddr->data.len = ETH_ALEN; |
| memcpy(&macaddr->data.data, new_addr->sa_data, ETH_ALEN); |
| |
| /* Set up the resultcode argument */ |
| resultcode->did = DIDmsg_dot11req_mibset_resultcode; |
| resultcode->status = P80211ENUM_msgitem_status_no_value; |
| resultcode->len = sizeof(resultcode->data); |
| resultcode->data = 0; |
| |
| /* now fire the request */ |
| result = p80211req_dorequest(dev->ml_priv, (u8 *)&dot11req); |
| |
| /* If the request wasn't successful, report an error and don't |
| * change the netdev address |
| */ |
| if (result != 0 || resultcode->data != P80211ENUM_resultcode_success) { |
| printk(KERN_ERR |
| "Low-level driver failed dot11req_mibset(dot11MACAddress).\n"); |
| result = -EADDRNOTAVAIL; |
| } else { |
| /* everything's ok, change the addr in netdev */ |
| memcpy(dev->dev_addr, new_addr->sa_data, dev->addr_len); |
| } |
| |
| return result; |
| } |
| |
| static int wlan_change_mtu(netdevice_t *dev, int new_mtu) |
| { |
| /* 2312 is max 802.11 payload, 20 is overhead, (ether + llc +snap) |
| and another 8 for wep. */ |
| if ((new_mtu < 68) || (new_mtu > (2312 - 20 - 8))) |
| return -EINVAL; |
| |
| dev->mtu = new_mtu; |
| |
| return 0; |
| } |
| |
| static const struct net_device_ops p80211_netdev_ops = { |
| .ndo_init = p80211knetdev_init, |
| .ndo_open = p80211knetdev_open, |
| .ndo_stop = p80211knetdev_stop, |
| .ndo_get_stats = p80211knetdev_get_stats, |
| .ndo_start_xmit = p80211knetdev_hard_start_xmit, |
| .ndo_set_multicast_list = p80211knetdev_set_multicast_list, |
| .ndo_do_ioctl = p80211knetdev_do_ioctl, |
| .ndo_set_mac_address = p80211knetdev_set_mac_address, |
| .ndo_tx_timeout = p80211knetdev_tx_timeout, |
| .ndo_change_mtu = wlan_change_mtu, |
| .ndo_validate_addr = eth_validate_addr, |
| }; |
| |
| /*---------------------------------------------------------------- |
| * wlan_setup |
| * |
| * Roughly matches the functionality of ether_setup. Here |
| * we set up any members of the wlandevice structure that are common |
| * to all devices. Additionally, we allocate a linux 'struct device' |
| * and perform the same setup as ether_setup. |
| * |
| * Note: It's important that the caller have setup the wlandev->name |
| * ptr prior to calling this function. |
| * |
| * Arguments: |
| * wlandev ptr to the wlandev structure for the |
| * interface. |
| * Returns: |
| * zero on success, non-zero otherwise. |
| * Call Context: |
| * Should be process thread. We'll assume it might be |
| * interrupt though. When we add support for statically |
| * compiled drivers, this function will be called in the |
| * context of the kernel startup code. |
| ----------------------------------------------------------------*/ |
| int wlan_setup(wlandevice_t *wlandev) |
| { |
| int result = 0; |
| netdevice_t *dev; |
| |
| /* Set up the wlandev */ |
| wlandev->state = WLAN_DEVICE_CLOSED; |
| wlandev->ethconv = WLAN_ETHCONV_8021h; |
| wlandev->macmode = WLAN_MACMODE_NONE; |
| |
| /* Set up the rx queue */ |
| skb_queue_head_init(&wlandev->nsd_rxq); |
| tasklet_init(&wlandev->rx_bh, |
| p80211netdev_rx_bh, (unsigned long)wlandev); |
| |
| /* Allocate and initialize the struct device */ |
| dev = alloc_netdev(0, "wlan%d", ether_setup); |
| if (dev == NULL) { |
| printk(KERN_ERR "Failed to alloc netdev.\n"); |
| result = 1; |
| } else { |
| wlandev->netdev = dev; |
| dev->ml_priv = wlandev; |
| dev->netdev_ops = &p80211_netdev_ops; |
| |
| mutex_init(&wlandev->ioctl_lock); |
| /* block ioctls until fully initialised. Don't forget to call |
| allow_ioctls at some point!*/ |
| mutex_lock(&wlandev->ioctl_lock); |
| |
| #if (WIRELESS_EXT < 21) |
| dev->get_wireless_stats = p80211wext_get_wireless_stats; |
| #endif |
| dev->wireless_handlers = &p80211wext_handler_def; |
| |
| netif_stop_queue(dev); |
| netif_carrier_off(dev); |
| } |
| |
| return result; |
| } |
| |
| /*---------------------------------------------------------------- |
| * wlan_unsetup |
| * |
| * This function is paired with the wlan_setup routine. It should |
| * be called after unregister_wlandev. Basically, all it does is |
| * free the 'struct device' that's associated with the wlandev. |
| * We do it here because the 'struct device' isn't allocated |
| * explicitly in the driver code, it's done in wlan_setup. To |
| * do the free in the driver might seem like 'magic'. |
| * |
| * Arguments: |
| * wlandev ptr to the wlandev structure for the |
| * interface. |
| * Returns: |
| * zero on success, non-zero otherwise. |
| * Call Context: |
| * Should be process thread. We'll assume it might be |
| * interrupt though. When we add support for statically |
| * compiled drivers, this function will be called in the |
| * context of the kernel startup code. |
| ----------------------------------------------------------------*/ |
| int wlan_unsetup(wlandevice_t *wlandev) |
| { |
| int result = 0; |
| |
| tasklet_kill(&wlandev->rx_bh); |
| |
| if (wlandev->netdev == NULL) { |
| printk(KERN_ERR "called without wlandev->netdev set.\n"); |
| result = 1; |
| } else { |
| free_netdev(wlandev->netdev); |
| wlandev->netdev = NULL; |
| } |
| |
| return 0; |
| } |
| |
| /*---------------------------------------------------------------- |
| * register_wlandev |
| * |
| * Roughly matches the functionality of register_netdev. This function |
| * is called after the driver has successfully probed and set up the |
| * resources for the device. It's now ready to become a named device |
| * in the Linux system. |
| * |
| * First we allocate a name for the device (if not already set), then |
| * we call the Linux function register_netdevice. |
| * |
| * Arguments: |
| * wlandev ptr to the wlandev structure for the |
| * interface. |
| * Returns: |
| * zero on success, non-zero otherwise. |
| * Call Context: |
| * Can be either interrupt or not. |
| ----------------------------------------------------------------*/ |
| int register_wlandev(wlandevice_t *wlandev) |
| { |
| int i = 0; |
| |
| i = register_netdev(wlandev->netdev); |
| if (i) |
| return i; |
| |
| return 0; |
| } |
| |
| /*---------------------------------------------------------------- |
| * unregister_wlandev |
| * |
| * Roughly matches the functionality of unregister_netdev. This |
| * function is called to remove a named device from the system. |
| * |
| * First we tell linux that the device should no longer exist. |
| * Then we remove it from the list of known wlan devices. |
| * |
| * Arguments: |
| * wlandev ptr to the wlandev structure for the |
| * interface. |
| * Returns: |
| * zero on success, non-zero otherwise. |
| * Call Context: |
| * Can be either interrupt or not. |
| ----------------------------------------------------------------*/ |
| int unregister_wlandev(wlandevice_t *wlandev) |
| { |
| struct sk_buff *skb; |
| |
| unregister_netdev(wlandev->netdev); |
| |
| /* Now to clean out the rx queue */ |
| while ((skb = skb_dequeue(&wlandev->nsd_rxq))) |
| dev_kfree_skb(skb); |
| |
| return 0; |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211netdev_hwremoved |
| * |
| * Hardware removed notification. This function should be called |
| * immediately after an MSD has detected that the underlying hardware |
| * has been yanked out from under us. The primary things we need |
| * to do are: |
| * - Mark the wlandev |
| * - Prevent any further traffic from the knetdev i/f |
| * - Prevent any further requests from mgmt i/f |
| * - If there are any waitq'd mgmt requests or mgmt-frame exchanges, |
| * shut them down. |
| * - Call the MSD hwremoved function. |
| * |
| * The remainder of the cleanup will be handled by unregister(). |
| * Our primary goal here is to prevent as much tickling of the MSD |
| * as possible since the MSD is already in a 'wounded' state. |
| * |
| * TODO: As new features are added, this function should be |
| * updated. |
| * |
| * Arguments: |
| * wlandev WLAN network device structure |
| * Returns: |
| * nothing |
| * Side effects: |
| * |
| * Call context: |
| * Usually interrupt. |
| ----------------------------------------------------------------*/ |
| void p80211netdev_hwremoved(wlandevice_t *wlandev) |
| { |
| wlandev->hwremoved = 1; |
| if (wlandev->state == WLAN_DEVICE_OPEN) |
| netif_stop_queue(wlandev->netdev); |
| |
| netif_device_detach(wlandev->netdev); |
| } |
| |
| /*---------------------------------------------------------------- |
| * p80211_rx_typedrop |
| * |
| * Classifies the frame, increments the appropriate counter, and |
| * returns 0|1|2 indicating whether the driver should handle, ignore, or |
| * drop the frame |
| * |
| * Arguments: |
| * wlandev wlan device structure |
| * fc frame control field |
| * |
| * Returns: |
| * zero if the frame should be handled by the driver, |
| * one if the frame should be ignored |
| * anything else means we drop it. |
| * |
| * Side effects: |
| * |
| * Call context: |
| * interrupt |
| ----------------------------------------------------------------*/ |
| static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc) |
| { |
| u16 ftype; |
| u16 fstype; |
| int drop = 0; |
| /* Classify frame, increment counter */ |
| ftype = WLAN_GET_FC_FTYPE(fc); |
| fstype = WLAN_GET_FC_FSTYPE(fc); |
| #if 0 |
| pr_debug("rx_typedrop : ftype=%d fstype=%d.\n", ftype, fstype); |
| #endif |
| switch (ftype) { |
| case WLAN_FTYPE_MGMT: |
| if ((wlandev->netdev->flags & IFF_PROMISC) || |
| (wlandev->netdev->flags & IFF_ALLMULTI)) { |
| drop = 1; |
| break; |
| } |
| pr_debug("rx'd mgmt:\n"); |
| wlandev->rx.mgmt++; |
| switch (fstype) { |
| case WLAN_FSTYPE_ASSOCREQ: |
| /* printk("assocreq"); */ |
| wlandev->rx.assocreq++; |
| break; |
| case WLAN_FSTYPE_ASSOCRESP: |
| /* printk("assocresp"); */ |
| wlandev->rx.assocresp++; |
| break; |
| case WLAN_FSTYPE_REASSOCREQ: |
| /* printk("reassocreq"); */ |
| wlandev->rx.reassocreq++; |
| break; |
| case WLAN_FSTYPE_REASSOCRESP: |
| /* printk("reassocresp"); */ |
| wlandev->rx.reassocresp++; |
| break; |
| case WLAN_FSTYPE_PROBEREQ: |
| /* printk("probereq"); */ |
| wlandev->rx.probereq++; |
| break; |
| case WLAN_FSTYPE_PROBERESP: |
| /* printk("proberesp"); */ |
| wlandev->rx.proberesp++; |
| break; |
| case WLAN_FSTYPE_BEACON: |
| /* printk("beacon"); */ |
| wlandev->rx.beacon++; |
| break; |
| case WLAN_FSTYPE_ATIM: |
| /* printk("atim"); */ |
| wlandev->rx.atim++; |
| break; |
| case WLAN_FSTYPE_DISASSOC: |
| /* printk("disassoc"); */ |
| wlandev->rx.disassoc++; |
| break; |
| case WLAN_FSTYPE_AUTHEN: |
| /* printk("authen"); */ |
| wlandev->rx.authen++; |
| break; |
| case WLAN_FSTYPE_DEAUTHEN: |
| /* printk("deauthen"); */ |
| wlandev->rx.deauthen++; |
| break; |
| default: |
| /* printk("unknown"); */ |
| wlandev->rx.mgmt_unknown++; |
| break; |
| } |
| /* printk("\n"); */ |
| drop = 2; |
| break; |
| |
| case WLAN_FTYPE_CTL: |
| if ((wlandev->netdev->flags & IFF_PROMISC) || |
| (wlandev->netdev->flags & IFF_ALLMULTI)) { |
| drop = 1; |
| break; |
| } |
| pr_debug("rx'd ctl:\n"); |
| wlandev->rx.ctl++; |
| switch (fstype) { |
| case WLAN_FSTYPE_PSPOLL: |
| /* printk("pspoll"); */ |
| wlandev->rx.pspoll++; |
| break; |
| case WLAN_FSTYPE_RTS: |
| /* printk("rts"); */ |
| wlandev->rx.rts++; |
| break; |
| case WLAN_FSTYPE_CTS: |
| /* printk("cts"); */ |
| wlandev->rx.cts++; |
| break; |
| case WLAN_FSTYPE_ACK: |
| /* printk("ack"); */ |
| wlandev->rx.ack++; |
| break; |
| case WLAN_FSTYPE_CFEND: |
| /* printk("cfend"); */ |
| wlandev->rx.cfend++; |
| break; |
| case WLAN_FSTYPE_CFENDCFACK: |
| /* printk("cfendcfack"); */ |
| wlandev->rx.cfendcfack++; |
| break; |
| default: |
| /* printk("unknown"); */ |
| wlandev->rx.ctl_unknown++; |
| break; |
| } |
| /* printk("\n"); */ |
| drop = 2; |
| break; |
| |
| case WLAN_FTYPE_DATA: |
| wlandev->rx.data++; |
| switch (fstype) { |
| case WLAN_FSTYPE_DATAONLY: |
| wlandev->rx.dataonly++; |
| break; |
| case WLAN_FSTYPE_DATA_CFACK: |
| wlandev->rx.data_cfack++; |
| break; |
| case WLAN_FSTYPE_DATA_CFPOLL: |
| wlandev->rx.data_cfpoll++; |
| break; |
| case WLAN_FSTYPE_DATA_CFACK_CFPOLL: |
| wlandev->rx.data__cfack_cfpoll++; |
| break; |
| case WLAN_FSTYPE_NULL: |
| pr_debug("rx'd data:null\n"); |
| wlandev->rx.null++; |
| break; |
| case WLAN_FSTYPE_CFACK: |
| pr_debug("rx'd data:cfack\n"); |
| wlandev->rx.cfack++; |
| break; |
| case WLAN_FSTYPE_CFPOLL: |
| pr_debug("rx'd data:cfpoll\n"); |
| wlandev->rx.cfpoll++; |
| break; |
| case WLAN_FSTYPE_CFACK_CFPOLL: |
| pr_debug("rx'd data:cfack_cfpoll\n"); |
| wlandev->rx.cfack_cfpoll++; |
| break; |
| default: |
| /* printk("unknown"); */ |
| wlandev->rx.data_unknown++; |
| break; |
| } |
| |
| break; |
| } |
| return drop; |
| } |
| |
| static void p80211knetdev_tx_timeout(netdevice_t *netdev) |
| { |
| wlandevice_t *wlandev = netdev->ml_priv; |
| |
| if (wlandev->tx_timeout) { |
| wlandev->tx_timeout(wlandev); |
| } else { |
| printk(KERN_WARNING "Implement tx_timeout for %s\n", |
| wlandev->nsdname); |
| netif_wake_queue(wlandev->netdev); |
| } |
| } |
| |
| void p80211_allow_ioctls(wlandevice_t *wlandev) |
| { |
| mutex_unlock(&wlandev->ioctl_lock); |
| } |