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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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b9ff77e50c
This patch removes the monitor implementation file and put all monitor stuff into iface file. It's now small enough to put all necessary handling into iface. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
405 lines
10 KiB
C
405 lines
10 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/af_ieee802154.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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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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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 = sdata->pan_id;
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changed |= IEEE802154_LLSEC_PARAM_PAN_ID;
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params.hwaddr = sdata->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 sockaddr_ieee802154 *sa =
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(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
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int err = -ENOIOCTLCMD;
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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(sdata->pan_id);
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short_addr = le16_to_cpu(sdata->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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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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sdata->pan_id = cpu_to_le16(sa->addr.pan_id);
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sdata->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 sockaddr *addr = p;
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if (netif_running(dev))
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return -EBUSY;
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/* FIXME: validate addr */
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memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
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mac802154_dev_set_ieee_addr(dev);
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return mac802154_wpan_update_llsec(dev);
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}
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int mac802154_set_mac_params(struct net_device *dev,
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const struct ieee802154_mac_params *params)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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mutex_lock(&sdata->local->iflist_mtx);
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sdata->mac_params = *params;
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mutex_unlock(&sdata->local->iflist_mtx);
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return 0;
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}
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void mac802154_get_mac_params(struct net_device *dev,
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struct ieee802154_mac_params *params)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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mutex_lock(&sdata->local->iflist_mtx);
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*params = sdata->mac_params;
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mutex_unlock(&sdata->local->iflist_mtx);
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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 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 (phy->set_txpower) {
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rc = phy->set_txpower(phy, sdata->mac_params.transmit_power);
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if (rc < 0)
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goto out;
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}
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if (phy->set_lbt) {
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rc = phy->set_lbt(phy, sdata->mac_params.lbt);
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if (rc < 0)
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goto out;
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}
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if (phy->set_cca_mode) {
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rc = phy->set_cca_mode(phy, sdata->mac_params.cca_mode);
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if (rc < 0)
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goto out;
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}
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if (phy->set_cca_ed_level) {
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rc = phy->set_cca_ed_level(phy, sdata->mac_params.cca_ed_level);
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if (rc < 0)
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goto out;
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}
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if (phy->set_csma_params) {
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rc = phy->set_csma_params(phy, sdata->mac_params.min_be,
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sdata->mac_params.max_be,
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sdata->mac_params.csma_retries);
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if (rc < 0)
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goto out;
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}
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if (phy->set_frame_retries) {
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rc = phy->set_frame_retries(phy,
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sdata->mac_params.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_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 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 (sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
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sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
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sdata->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 = sdata->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 = sdata->short_addr;
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}
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hdr.source.pan_id = sdata->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_slave_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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void mac802154_wpan_setup(struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata;
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dev->addr_len = IEEE802154_ADDR_LEN;
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memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
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dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
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dev->header_ops = &mac802154_header_ops;
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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->type = ARPHRD_IEEE802154;
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dev->flags = IFF_NOARP | IFF_BROADCAST;
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dev->watchdog_timeo = 0;
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dev->destructor = mac802154_wpan_free;
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dev->netdev_ops = &mac802154_wpan_ops;
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dev->ml_priv = &mac802154_mlme_wpan;
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sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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sdata->type = IEEE802154_DEV_WPAN;
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sdata->chan = MAC802154_CHAN_NONE;
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sdata->page = 0;
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spin_lock_init(&sdata->mib_lock);
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mutex_init(&sdata->sec_mtx);
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get_random_bytes(&sdata->bsn, 1);
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get_random_bytes(&sdata->dsn, 1);
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/* defaults per 802.15.4-2011 */
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sdata->mac_params.min_be = 3;
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sdata->mac_params.max_be = 5;
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sdata->mac_params.csma_retries = 4;
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/* for compatibility, actual default is 3 */
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sdata->mac_params.frame_retries = -1;
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sdata->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
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sdata->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
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mac802154_llsec_init(&sdata->sec);
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}
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void mac802154_monitor_setup(struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata;
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dev->addr_len = 0;
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dev->hard_header_len = 0;
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dev->needed_tailroom = 2; /* room for FCS */
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dev->mtu = IEEE802154_MTU;
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dev->tx_queue_len = 10;
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dev->type = ARPHRD_IEEE802154_MONITOR;
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dev->flags = IFF_NOARP | IFF_BROADCAST;
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dev->watchdog_timeo = 0;
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dev->destructor = free_netdev;
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dev->netdev_ops = &mac802154_monitor_ops;
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dev->ml_priv = &mac802154_mlme_reduced;
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sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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sdata->type = IEEE802154_DEV_MONITOR;
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sdata->chan = MAC802154_CHAN_NONE; /* not initialized */
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sdata->page = 0;
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}
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