2789e6297f
Instead of always re-lock the iflist_mtx at multiple interfaces we lock the complete for each loop at start and at the end. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
551 lines
13 KiB
C
551 lines
13 KiB
C
/*
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* Copyright 2007-2012 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by:
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Sergey Lapin <slapin@ossfans.org>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#include <linux/netdevice.h>
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#include <linux/module.h>
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#include <linux/if_arp.h>
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#include <linux/ieee802154.h>
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#include <net/rtnetlink.h>
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#include <linux/nl802154.h>
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#include <net/mac802154.h>
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#include <net/ieee802154_netdev.h>
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#include <net/cfg802154.h>
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#include "ieee802154_i.h"
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#include "driver-ops.h"
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static int mac802154_wpan_update_llsec(struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
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struct wpan_dev *wpan_dev = &sdata->wpan_dev;
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int rc = 0;
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if (ops->llsec) {
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struct ieee802154_llsec_params params;
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int changed = 0;
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params.pan_id = wpan_dev->pan_id;
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changed |= IEEE802154_LLSEC_PARAM_PAN_ID;
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params.hwaddr = wpan_dev->extended_addr;
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changed |= IEEE802154_LLSEC_PARAM_HWADDR;
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rc = ops->llsec->set_params(dev, ¶ms, changed);
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}
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return rc;
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}
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static int
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mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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struct wpan_dev *wpan_dev = &sdata->wpan_dev;
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struct sockaddr_ieee802154 *sa =
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(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
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int err = -ENOIOCTLCMD;
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ASSERT_RTNL();
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spin_lock_bh(&sdata->mib_lock);
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switch (cmd) {
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case SIOCGIFADDR:
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{
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u16 pan_id, short_addr;
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pan_id = le16_to_cpu(wpan_dev->pan_id);
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short_addr = le16_to_cpu(wpan_dev->short_addr);
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if (pan_id == IEEE802154_PANID_BROADCAST ||
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short_addr == IEEE802154_ADDR_BROADCAST) {
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err = -EADDRNOTAVAIL;
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break;
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}
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sa->family = AF_IEEE802154;
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sa->addr.addr_type = IEEE802154_ADDR_SHORT;
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sa->addr.pan_id = pan_id;
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sa->addr.short_addr = short_addr;
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err = 0;
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break;
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}
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case SIOCSIFADDR:
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if (netif_running(dev)) {
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spin_unlock_bh(&sdata->mib_lock);
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return -EBUSY;
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}
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dev_warn(&dev->dev,
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"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
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if (sa->family != AF_IEEE802154 ||
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sa->addr.addr_type != IEEE802154_ADDR_SHORT ||
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sa->addr.pan_id == IEEE802154_PANID_BROADCAST ||
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sa->addr.short_addr == IEEE802154_ADDR_BROADCAST ||
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sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
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err = -EINVAL;
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break;
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}
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wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
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wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
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err = mac802154_wpan_update_llsec(dev);
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break;
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}
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spin_unlock_bh(&sdata->mib_lock);
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return err;
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}
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static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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struct sockaddr *addr = p;
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__le64 extended_addr;
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if (netif_running(dev))
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return -EBUSY;
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ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
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if (!ieee802154_is_valid_extended_addr(extended_addr))
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return -EINVAL;
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memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
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sdata->wpan_dev.extended_addr = extended_addr;
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return mac802154_wpan_update_llsec(dev);
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}
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static int mac802154_slave_open(struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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struct ieee802154_sub_if_data *subif;
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struct ieee802154_local *local = sdata->local;
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int res = 0;
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ASSERT_RTNL();
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if (sdata->vif.type == IEEE802154_DEV_WPAN) {
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mutex_lock(&sdata->local->iflist_mtx);
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list_for_each_entry(subif, &sdata->local->interfaces, list) {
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if (subif != sdata &&
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subif->vif.type == sdata->vif.type &&
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ieee802154_sdata_running(subif)) {
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mutex_unlock(&sdata->local->iflist_mtx);
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return -EBUSY;
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}
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}
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mutex_unlock(&sdata->local->iflist_mtx);
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}
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set_bit(SDATA_STATE_RUNNING, &sdata->state);
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if (!local->open_count) {
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res = drv_start(local);
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WARN_ON(res);
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if (res)
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goto err;
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}
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local->open_count++;
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netif_start_queue(dev);
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return 0;
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err:
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/* might already be clear but that doesn't matter */
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clear_bit(SDATA_STATE_RUNNING, &sdata->state);
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return res;
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}
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static int mac802154_wpan_open(struct net_device *dev)
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{
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int rc;
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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struct ieee802154_local *local = sdata->local;
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struct wpan_dev *wpan_dev = &sdata->wpan_dev;
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struct wpan_phy *phy = sdata->local->phy;
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rc = mac802154_slave_open(dev);
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if (rc < 0)
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return rc;
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mutex_lock(&phy->pib_lock);
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if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
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rc = drv_set_promiscuous_mode(local,
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wpan_dev->promiscuous_mode);
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if (rc < 0)
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goto out;
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}
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if (local->hw.flags & IEEE802154_HW_AFILT) {
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rc = drv_set_pan_id(local, wpan_dev->pan_id);
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if (rc < 0)
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goto out;
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rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
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if (rc < 0)
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goto out;
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rc = drv_set_short_addr(local, wpan_dev->short_addr);
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if (rc < 0)
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goto out;
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}
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if (local->hw.flags & IEEE802154_HW_LBT) {
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rc = drv_set_lbt_mode(local, wpan_dev->lbt);
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if (rc < 0)
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goto out;
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}
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if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
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rc = drv_set_csma_params(local, wpan_dev->min_be,
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wpan_dev->max_be,
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wpan_dev->csma_retries);
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if (rc < 0)
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goto out;
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}
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if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
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rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
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if (rc < 0)
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goto out;
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}
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mutex_unlock(&phy->pib_lock);
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return 0;
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out:
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mutex_unlock(&phy->pib_lock);
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return rc;
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}
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static int mac802154_slave_close(struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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struct ieee802154_local *local = sdata->local;
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ASSERT_RTNL();
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netif_stop_queue(dev);
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local->open_count--;
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clear_bit(SDATA_STATE_RUNNING, &sdata->state);
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if (!local->open_count)
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drv_stop(local);
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return 0;
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}
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static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
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struct ieee802154_hdr *hdr,
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const struct ieee802154_mac_cb *cb)
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{
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struct ieee802154_llsec_params params;
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u8 level;
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mac802154_llsec_get_params(&sdata->sec, ¶ms);
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if (!params.enabled && cb->secen_override && cb->secen)
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return -EINVAL;
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if (!params.enabled ||
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(cb->secen_override && !cb->secen) ||
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!params.out_level)
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return 0;
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if (cb->seclevel_override && !cb->seclevel)
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return -EINVAL;
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level = cb->seclevel_override ? cb->seclevel : params.out_level;
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hdr->fc.security_enabled = 1;
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hdr->sec.level = level;
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hdr->sec.key_id_mode = params.out_key.mode;
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if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
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hdr->sec.short_src = params.out_key.short_source;
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else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
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hdr->sec.extended_src = params.out_key.extended_source;
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hdr->sec.key_id = params.out_key.id;
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return 0;
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}
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static int mac802154_header_create(struct sk_buff *skb,
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struct net_device *dev,
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unsigned short type,
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const void *daddr,
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const void *saddr,
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unsigned len)
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{
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struct ieee802154_hdr hdr;
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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struct wpan_dev *wpan_dev = &sdata->wpan_dev;
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struct ieee802154_mac_cb *cb = mac_cb(skb);
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int hlen;
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if (!daddr)
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return -EINVAL;
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memset(&hdr.fc, 0, sizeof(hdr.fc));
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hdr.fc.type = cb->type;
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hdr.fc.security_enabled = cb->secen;
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hdr.fc.ack_request = cb->ackreq;
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hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
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if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
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return -EINVAL;
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if (!saddr) {
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spin_lock_bh(&sdata->mib_lock);
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if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
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wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
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wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
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hdr.source.mode = IEEE802154_ADDR_LONG;
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hdr.source.extended_addr = wpan_dev->extended_addr;
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} else {
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hdr.source.mode = IEEE802154_ADDR_SHORT;
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hdr.source.short_addr = wpan_dev->short_addr;
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}
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hdr.source.pan_id = wpan_dev->pan_id;
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spin_unlock_bh(&sdata->mib_lock);
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} else {
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hdr.source = *(const struct ieee802154_addr *)saddr;
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}
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hdr.dest = *(const struct ieee802154_addr *)daddr;
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hlen = ieee802154_hdr_push(skb, &hdr);
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if (hlen < 0)
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return -EINVAL;
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skb_reset_mac_header(skb);
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skb->mac_len = hlen;
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if (len > ieee802154_max_payload(&hdr))
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return -EMSGSIZE;
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return hlen;
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}
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static int
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mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
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{
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struct ieee802154_hdr hdr;
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struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr;
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if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
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pr_debug("malformed packet\n");
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return 0;
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}
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*addr = hdr.source;
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return sizeof(*addr);
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}
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static struct header_ops mac802154_header_ops = {
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.create = mac802154_header_create,
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.parse = mac802154_header_parse,
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};
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static const struct net_device_ops mac802154_wpan_ops = {
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.ndo_open = mac802154_wpan_open,
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.ndo_stop = mac802154_slave_close,
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.ndo_start_xmit = ieee802154_subif_start_xmit,
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.ndo_do_ioctl = mac802154_wpan_ioctl,
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.ndo_set_mac_address = mac802154_wpan_mac_addr,
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};
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static const struct net_device_ops mac802154_monitor_ops = {
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.ndo_open = mac802154_wpan_open,
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.ndo_stop = mac802154_slave_close,
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.ndo_start_xmit = ieee802154_monitor_start_xmit,
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};
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static void mac802154_wpan_free(struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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mac802154_llsec_destroy(&sdata->sec);
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free_netdev(dev);
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}
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static void ieee802154_if_setup(struct net_device *dev)
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{
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dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
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memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
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dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
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dev->needed_tailroom = 2 + 16; /* FCS + MIC */
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dev->mtu = IEEE802154_MTU;
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dev->tx_queue_len = 300;
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dev->flags = IFF_NOARP | IFF_BROADCAST;
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}
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static int
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ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, int type)
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{
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struct wpan_dev *wpan_dev = &sdata->wpan_dev;
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/* set some type-dependent values */
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sdata->vif.type = type;
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sdata->wpan_dev.iftype = type;
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get_random_bytes(&wpan_dev->bsn, 1);
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get_random_bytes(&wpan_dev->dsn, 1);
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/* defaults per 802.15.4-2011 */
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wpan_dev->min_be = 3;
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wpan_dev->max_be = 5;
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wpan_dev->csma_retries = 4;
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/* for compatibility, actual default is 3 */
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wpan_dev->frame_retries = -1;
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wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
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wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
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switch (type) {
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case IEEE802154_DEV_WPAN:
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ieee802154_be64_to_le64(&wpan_dev->extended_addr,
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sdata->dev->dev_addr);
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sdata->dev->header_ops = &mac802154_header_ops;
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sdata->dev->destructor = mac802154_wpan_free;
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sdata->dev->netdev_ops = &mac802154_wpan_ops;
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sdata->dev->ml_priv = &mac802154_mlme_wpan;
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wpan_dev->promiscuous_mode = false;
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spin_lock_init(&sdata->mib_lock);
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mutex_init(&sdata->sec_mtx);
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mac802154_llsec_init(&sdata->sec);
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break;
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case IEEE802154_DEV_MONITOR:
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sdata->dev->destructor = free_netdev;
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sdata->dev->netdev_ops = &mac802154_monitor_ops;
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wpan_dev->promiscuous_mode = true;
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break;
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default:
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BUG();
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}
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return 0;
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}
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struct net_device *
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ieee802154_if_add(struct ieee802154_local *local, const char *name,
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struct wpan_dev **new_wpan_dev, int type)
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{
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struct net_device *ndev = NULL;
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struct ieee802154_sub_if_data *sdata = NULL;
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int ret = -ENOMEM;
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ASSERT_RTNL();
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ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
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NET_NAME_UNKNOWN, ieee802154_if_setup);
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if (!ndev)
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return ERR_PTR(-ENOMEM);
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ndev->needed_headroom = local->hw.extra_tx_headroom;
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ret = dev_alloc_name(ndev, ndev->name);
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if (ret < 0)
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goto err;
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switch (type) {
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case IEEE802154_DEV_WPAN:
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ndev->type = ARPHRD_IEEE802154;
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break;
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case IEEE802154_DEV_MONITOR:
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ndev->type = ARPHRD_IEEE802154_MONITOR;
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break;
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default:
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ret = -EINVAL;
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goto err;
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}
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ieee802154_le64_to_be64(ndev->perm_addr,
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&local->hw.phy->perm_extended_addr);
|
|
memcpy(ndev->dev_addr, ndev->perm_addr, IEEE802154_EXTENDED_ADDR_LEN);
|
|
/* TODO check this */
|
|
SET_NETDEV_DEV(ndev, &local->phy->dev);
|
|
sdata = netdev_priv(ndev);
|
|
ndev->ieee802154_ptr = &sdata->wpan_dev;
|
|
memcpy(sdata->name, ndev->name, IFNAMSIZ);
|
|
sdata->dev = ndev;
|
|
sdata->wpan_dev.wpan_phy = local->hw.phy;
|
|
sdata->local = local;
|
|
|
|
/* setup type-dependent data */
|
|
ret = ieee802154_setup_sdata(sdata, type);
|
|
if (ret)
|
|
goto err;
|
|
|
|
if (ndev) {
|
|
ret = register_netdevice(ndev);
|
|
if (ret < 0)
|
|
goto err;
|
|
}
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
list_add_tail_rcu(&sdata->list, &local->interfaces);
|
|
mutex_unlock(&local->iflist_mtx);
|
|
|
|
if (new_wpan_dev)
|
|
*new_wpan_dev = &sdata->wpan_dev;
|
|
|
|
return ndev;
|
|
|
|
err:
|
|
free_netdev(ndev);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
|
|
{
|
|
ASSERT_RTNL();
|
|
|
|
mutex_lock(&sdata->local->iflist_mtx);
|
|
list_del_rcu(&sdata->list);
|
|
mutex_unlock(&sdata->local->iflist_mtx);
|
|
|
|
synchronize_rcu();
|
|
unregister_netdevice(sdata->dev);
|
|
}
|
|
|
|
void ieee802154_remove_interfaces(struct ieee802154_local *local)
|
|
{
|
|
struct ieee802154_sub_if_data *sdata, *tmp;
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
|
|
list_del(&sdata->list);
|
|
|
|
unregister_netdevice(sdata->dev);
|
|
}
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|