// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Authors:
* Alexander Aring <[email protected]>
*
* Based on: net/mac80211/cfg.c
*/
#include <net/rtnetlink.h>
#include <net/cfg802154.h>
#include "ieee802154_i.h"
#include "driver-ops.h"
#include "cfg.h"
static struct net_device *
ieee802154_add_iface_deprecated(struct wpan_phy *wpan_phy,
const char *name,
unsigned char name_assign_type, int type)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
struct net_device *dev;
rtnl_lock();
dev = ieee802154_if_add(local, name, name_assign_type, type,
cpu_to_le64(0x0000000000000000ULL));
rtnl_unlock();
return dev;
}
static void ieee802154_del_iface_deprecated(struct wpan_phy *wpan_phy,
struct net_device *dev)
{
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
ieee802154_if_remove(sdata);
}
#ifdef CONFIG_PM
static int ieee802154_suspend(struct wpan_phy *wpan_phy)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
if (!local->open_count)
goto suspend;
ieee802154_sync_and_hold_queue(local);
synchronize_net();
/* stop hardware - this must stop RX */
ieee802154_stop_device(local);
suspend:
local->suspended = true;
return 0;
}
static int ieee802154_resume(struct wpan_phy *wpan_phy)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
/* nothing to do if HW shouldn't run */
if (!local->open_count)
goto wake_up;
/* restart hardware */
ret = drv_start(local, local->phy->filtering, &local->addr_filt);
if (ret)
return ret;
wake_up:
ieee802154_release_queue(local);
local->suspended = false;
return 0;
}
#else
#define ieee802154_suspend NULL
#define ieee802154_resume NULL
#endif
static int
ieee802154_add_iface(struct wpan_phy *phy, const char *name,
unsigned char name_assign_type,
enum nl802154_iftype type, __le64 extended_addr)
{
struct ieee802154_local *local = wpan_phy_priv(phy);
struct net_device *err;
err = ieee802154_if_add(local, name, name_assign_type, type,
extended_addr);
return PTR_ERR_OR_ZERO(err);
}
static int
ieee802154_del_iface(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev)
{
ieee802154_if_remove(IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev));
return 0;
}
static int
ieee802154_set_channel(struct wpan_phy *wpan_phy, u8 page, u8 channel)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
ASSERT_RTNL();
if (wpan_phy->current_page == page &&
wpan_phy->current_channel == channel)
return 0;
/* Refuse to change channels during scanning or beaconing */
if (mac802154_is_scanning(local) || mac802154_is_beaconing(local))
return -EBUSY;
ret = drv_set_channel(local, page, channel);
if (!ret) {
wpan_phy->current_page = page;
wpan_phy->current_channel = channel;
ieee802154_configure_durations(wpan_phy, page, channel);
}
return ret;
}
static int
ieee802154_set_cca_mode(struct wpan_phy *wpan_phy,
const struct wpan_phy_cca *cca)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
ASSERT_RTNL();
if (wpan_phy_cca_cmp(&wpan_phy->cca, cca))
return 0;
ret = drv_set_cca_mode(local, cca);
if (!ret)
wpan_phy->cca = *cca;
return ret;
}
static int
ieee802154_set_cca_ed_level(struct wpan_phy *wpan_phy, s32 ed_level)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
ASSERT_RTNL();
if (wpan_phy->cca_ed_level == ed_level)
return 0;
ret = drv_set_cca_ed_level(local, ed_level);
if (!ret)
wpan_phy->cca_ed_level = ed_level;
return ret;
}
static int
ieee802154_set_tx_power(struct wpan_phy *wpan_phy, s32 power)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
ASSERT_RTNL();
if (wpan_phy->transmit_power == power)
return 0;
ret = drv_set_tx_power(local, power);
if (!ret)
wpan_phy->transmit_power = power;
return ret;
}
static int
ieee802154_set_pan_id(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le16 pan_id)
{
int ret;
ASSERT_RTNL();
if (wpan_dev->pan_id == pan_id)
return 0;
ret = mac802154_wpan_update_llsec(wpan_dev->netdev);
if (!ret)
wpan_dev->pan_id = pan_id;
return ret;
}
static int
ieee802154_set_backoff_exponent(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
u8 min_be, u8 max_be)
{
ASSERT_RTNL();
wpan_dev->min_be = min_be;
wpan_dev->max_be = max_be;
return 0;
}
static int
ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le16 short_addr)
{
ASSERT_RTNL();
wpan_dev->short_addr = short_addr;
return 0;
}
static int
ieee802154_set_max_csma_backoffs(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
u8 max_csma_backoffs)
{
ASSERT_RTNL();
wpan_dev->csma_retries = max_csma_backoffs;
return 0;
}
static int
ieee802154_set_max_frame_retries(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
s8 max_frame_retries)
{
ASSERT_RTNL();
wpan_dev->frame_retries = max_frame_retries;
return 0;
}
static int
ieee802154_set_lbt_mode(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
bool mode)
{
ASSERT_RTNL();
wpan_dev->lbt = mode;
return 0;
}
static int
ieee802154_set_ackreq_default(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev, bool ackreq)
{
ASSERT_RTNL();
wpan_dev->ackreq = ackreq;
return 0;
}
static int mac802154_trigger_scan(struct wpan_phy *wpan_phy,
struct cfg802154_scan_request *request)
{
struct ieee802154_sub_if_data *sdata;
sdata = IEEE802154_WPAN_DEV_TO_SUB_IF(request->wpan_dev);
ASSERT_RTNL();
return mac802154_trigger_scan_locked(sdata, request);
}
static int mac802154_abort_scan(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
struct ieee802154_sub_if_data *sdata;
sdata = IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev);
ASSERT_RTNL();
return mac802154_abort_scan_locked(local, sdata);
}
static int mac802154_send_beacons(struct wpan_phy *wpan_phy,
struct cfg802154_beacon_request *request)
{
struct ieee802154_sub_if_data *sdata;
sdata = IEEE802154_WPAN_DEV_TO_SUB_IF(request->wpan_dev);
ASSERT_RTNL();
return mac802154_send_beacons_locked(sdata, request);
}
static int mac802154_stop_beacons(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
struct ieee802154_sub_if_data *sdata;
sdata = IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev);
ASSERT_RTNL();
return mac802154_stop_beacons_locked(local, sdata);
}
static int mac802154_associate(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_addr *coord)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
u64 ceaddr = swab64((__force u64)coord->extended_addr);
struct ieee802154_sub_if_data *sdata;
struct ieee802154_pan_device *parent;
__le16 short_addr;
int ret;
ASSERT_RTNL();
sdata = IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev);
if (wpan_dev->parent) {
dev_err(&sdata->dev->dev,
"Device %8phC is already associated\n", &ceaddr);
return -EPERM;
}
if (coord->mode == IEEE802154_SHORT_ADDRESSING)
return -EINVAL;
parent = kzalloc(sizeof(*parent), GFP_KERNEL);
if (!parent)
return -ENOMEM;
parent->pan_id = coord->pan_id;
parent->mode = coord->mode;
parent->extended_addr = coord->extended_addr;
parent->short_addr = cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST);
/* Set the PAN ID hardware address filter beforehand to avoid dropping
* the association response with a destination PAN ID field set to the
* "new" PAN ID.
*/
if (local->hw.flags & IEEE802154_HW_AFILT) {
ret = drv_set_pan_id(local, coord->pan_id);
if (ret < 0)
goto free_parent;
}
ret = mac802154_perform_association(sdata, parent, &short_addr);
if (ret)
goto reset_panid;
if (local->hw.flags & IEEE802154_HW_AFILT) {
ret = drv_set_short_addr(local, short_addr);
if (ret < 0)
goto reset_panid;
}
wpan_dev->pan_id = coord->pan_id;
wpan_dev->short_addr = short_addr;
wpan_dev->parent = parent;
return 0;
reset_panid:
if (local->hw.flags & IEEE802154_HW_AFILT)
drv_set_pan_id(local, cpu_to_le16(IEEE802154_PAN_ID_BROADCAST));
free_parent:
kfree(parent);
return ret;
}
static int mac802154_disassociate_from_parent(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
struct ieee802154_pan_device *child, *tmp;
struct ieee802154_sub_if_data *sdata;
unsigned int max_assoc;
u64 eaddr;
int ret;
sdata = IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev);
/* Start by disassociating all the children and preventing new ones to
* attempt associations.
*/
max_assoc = cfg802154_set_max_associations(wpan_dev, 0);
list_for_each_entry_safe(child, tmp, &wpan_dev->children, node) {
ret = mac802154_send_disassociation_notif(sdata, child,
IEEE802154_COORD_WISHES_DEVICE_TO_LEAVE);
if (ret) {
eaddr = swab64((__force u64)child->extended_addr);
dev_err(&sdata->dev->dev,
"Disassociation with %8phC may have failed (%d)\n",
&eaddr, ret);
}
list_del(&child->node);
}
ret = mac802154_send_disassociation_notif(sdata, wpan_dev->parent,
IEEE802154_DEVICE_WISHES_TO_LEAVE);
if (ret) {
eaddr = swab64((__force u64)wpan_dev->parent->extended_addr);
dev_err(&sdata->dev->dev,
"Disassociation from %8phC may have failed (%d)\n",
&eaddr, ret);
}
ret = 0;
kfree(wpan_dev->parent);
wpan_dev->parent = NULL;
wpan_dev->pan_id = cpu_to_le16(IEEE802154_PAN_ID_BROADCAST);
wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST);
if (local->hw.flags & IEEE802154_HW_AFILT) {
ret = drv_set_pan_id(local, wpan_dev->pan_id);
if (ret < 0)
goto reset_mac_assoc;
ret = drv_set_short_addr(local, wpan_dev->short_addr);
if (ret < 0)
goto reset_mac_assoc;
}
reset_mac_assoc:
cfg802154_set_max_associations(wpan_dev, max_assoc);
return ret;
}
static int mac802154_disassociate_child(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_pan_device *child)
{
struct ieee802154_sub_if_data *sdata;
int ret;
sdata = IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev);
ret = mac802154_send_disassociation_notif(sdata, child,
IEEE802154_COORD_WISHES_DEVICE_TO_LEAVE);
if (ret)
return ret;
list_del(&child->node);
wpan_dev->nchildren--;
kfree(child);
return 0;
}
static int mac802154_disassociate(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_addr *target)
{
u64 teaddr = swab64((__force u64)target->extended_addr);
struct ieee802154_pan_device *pan_device;
ASSERT_RTNL();
if (cfg802154_device_is_parent(wpan_dev, target))
return mac802154_disassociate_from_parent(wpan_phy, wpan_dev);
pan_device = cfg802154_device_is_child(wpan_dev, target);
if (pan_device)
return mac802154_disassociate_child(wpan_phy, wpan_dev,
pan_device);
dev_err(&wpan_dev->netdev->dev,
"Device %8phC is not associated with us\n", &teaddr);
return -EINVAL;
}
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
static void
ieee802154_get_llsec_table(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_llsec_table **table)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
*table = &sdata->sec.table;
}
static void
ieee802154_lock_llsec_table(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
mutex_lock(&sdata->sec_mtx);
}
static void
ieee802154_unlock_llsec_table(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
mutex_unlock(&sdata->sec_mtx);
}
static int
ieee802154_set_llsec_params(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_params *params,
int changed)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_set_params(&sdata->sec, params, changed);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_get_llsec_params(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_llsec_params *params)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_get_params(&sdata->sec, params);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_add_llsec_key(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_key_id *id,
const struct ieee802154_llsec_key *key)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_key_add(&sdata->sec, id, key);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_del_llsec_key(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_key_id *id)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_key_del(&sdata->sec, id);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_add_seclevel(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_seclevel *sl)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_seclevel_add(&sdata->sec, sl);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_del_seclevel(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_seclevel *sl)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_seclevel_del(&sdata->sec, sl);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_add_device(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_device *dev_desc)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_dev_add(&sdata->sec, dev_desc);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_del_device(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le64 extended_addr)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_dev_del(&sdata->sec, extended_addr);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_add_devkey(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le64 extended_addr,
const struct ieee802154_llsec_device_key *key)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_devkey_add(&sdata->sec, extended_addr, key);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_del_devkey(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le64 extended_addr,
const struct ieee802154_llsec_device_key *key)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_devkey_del(&sdata->sec, extended_addr, key);
mutex_unlock(&sdata->sec_mtx);
return res;
}
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
const struct cfg802154_ops mac802154_config_ops = {
.add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,
.del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
.suspend = ieee802154_suspend,
.resume = ieee802154_resume,
.add_virtual_intf = ieee802154_add_iface,
.del_virtual_intf = ieee802154_del_iface,
.set_channel = ieee802154_set_channel,
.set_cca_mode = ieee802154_set_cca_mode,
.set_cca_ed_level = ieee802154_set_cca_ed_level,
.set_tx_power = ieee802154_set_tx_power,
.set_pan_id = ieee802154_set_pan_id,
.set_short_addr = ieee802154_set_short_addr,
.set_backoff_exponent = ieee802154_set_backoff_exponent,
.set_max_csma_backoffs = ieee802154_set_max_csma_backoffs,
.set_max_frame_retries = ieee802154_set_max_frame_retries,
.set_lbt_mode = ieee802154_set_lbt_mode,
.set_ackreq_default = ieee802154_set_ackreq_default,
.trigger_scan = mac802154_trigger_scan,
.abort_scan = mac802154_abort_scan,
.send_beacons = mac802154_send_beacons,
.stop_beacons = mac802154_stop_beacons,
.associate = mac802154_associate,
.disassociate = mac802154_disassociate,
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
.get_llsec_table = ieee802154_get_llsec_table,
.lock_llsec_table = ieee802154_lock_llsec_table,
.unlock_llsec_table = ieee802154_unlock_llsec_table,
/* TODO above */
.set_llsec_params = ieee802154_set_llsec_params,
.get_llsec_params = ieee802154_get_llsec_params,
.add_llsec_key = ieee802154_add_llsec_key,
.del_llsec_key = ieee802154_del_llsec_key,
.add_seclevel = ieee802154_add_seclevel,
.del_seclevel = ieee802154_del_seclevel,
.add_device = ieee802154_add_device,
.del_device = ieee802154_del_device,
.add_devkey = ieee802154_add_devkey,
.del_devkey = ieee802154_del_devkey,
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
};
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