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ubuntu-linux-kernel/net/ieee802154/nl802154.c

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2024-04-01 15:06:58 +00:00
/* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Authors:
* Alexander Aring <aar@pengutronix.de>
*
* Based on: net/wireless/nl80211.c
*/
#include <linux/rtnetlink.h>
#include <net/cfg802154.h>
#include <net/genetlink.h>
#include <net/mac802154.h>
#include <net/netlink.h>
#include <net/nl802154.h>
#include <net/sock.h>
#include "nl802154.h"
#include "rdev-ops.h"
#include "core.h"
/* the netlink family */
static struct genl_family nl802154_fam;
/* multicast groups */
enum nl802154_multicast_groups {
NL802154_MCGRP_CONFIG,
};
static const struct genl_multicast_group nl802154_mcgrps[] = {
[NL802154_MCGRP_CONFIG] = { .name = "config", },
};
/* returns ERR_PTR values */
static struct wpan_dev *
__cfg802154_wpan_dev_from_attrs(struct net *netns, struct nlattr **attrs)
{
struct cfg802154_registered_device *rdev;
struct wpan_dev *result = NULL;
bool have_ifidx = attrs[NL802154_ATTR_IFINDEX];
bool have_wpan_dev_id = attrs[NL802154_ATTR_WPAN_DEV];
u64 wpan_dev_id;
int wpan_phy_idx = -1;
int ifidx = -1;
ASSERT_RTNL();
if (!have_ifidx && !have_wpan_dev_id)
return ERR_PTR(-EINVAL);
if (have_ifidx)
ifidx = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]);
if (have_wpan_dev_id) {
wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]);
wpan_phy_idx = wpan_dev_id >> 32;
}
list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
struct wpan_dev *wpan_dev;
if (wpan_phy_net(&rdev->wpan_phy) != netns)
continue;
if (have_wpan_dev_id && rdev->wpan_phy_idx != wpan_phy_idx)
continue;
list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
if (have_ifidx && wpan_dev->netdev &&
wpan_dev->netdev->ifindex == ifidx) {
result = wpan_dev;
break;
}
if (have_wpan_dev_id &&
wpan_dev->identifier == (u32)wpan_dev_id) {
result = wpan_dev;
break;
}
}
if (result)
break;
}
if (result)
return result;
return ERR_PTR(-ENODEV);
}
static struct cfg802154_registered_device *
__cfg802154_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
{
struct cfg802154_registered_device *rdev = NULL, *tmp;
struct net_device *netdev;
ASSERT_RTNL();
if (!attrs[NL802154_ATTR_WPAN_PHY] &&
!attrs[NL802154_ATTR_IFINDEX] &&
!attrs[NL802154_ATTR_WPAN_DEV])
return ERR_PTR(-EINVAL);
if (attrs[NL802154_ATTR_WPAN_PHY])
rdev = cfg802154_rdev_by_wpan_phy_idx(
nla_get_u32(attrs[NL802154_ATTR_WPAN_PHY]));
if (attrs[NL802154_ATTR_WPAN_DEV]) {
u64 wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]);
struct wpan_dev *wpan_dev;
bool found = false;
tmp = cfg802154_rdev_by_wpan_phy_idx(wpan_dev_id >> 32);
if (tmp) {
/* make sure wpan_dev exists */
list_for_each_entry(wpan_dev, &tmp->wpan_dev_list, list) {
if (wpan_dev->identifier != (u32)wpan_dev_id)
continue;
found = true;
break;
}
if (!found)
tmp = NULL;
if (rdev && tmp != rdev)
return ERR_PTR(-EINVAL);
rdev = tmp;
}
}
if (attrs[NL802154_ATTR_IFINDEX]) {
int ifindex = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]);
netdev = __dev_get_by_index(netns, ifindex);
if (netdev) {
if (netdev->ieee802154_ptr)
tmp = wpan_phy_to_rdev(
netdev->ieee802154_ptr->wpan_phy);
else
tmp = NULL;
/* not wireless device -- return error */
if (!tmp)
return ERR_PTR(-EINVAL);
/* mismatch -- return error */
if (rdev && tmp != rdev)
return ERR_PTR(-EINVAL);
rdev = tmp;
}
}
if (!rdev)
return ERR_PTR(-ENODEV);
if (netns != wpan_phy_net(&rdev->wpan_phy))
return ERR_PTR(-ENODEV);
return rdev;
}
/* This function returns a pointer to the driver
* that the genl_info item that is passed refers to.
*
* The result of this can be a PTR_ERR and hence must
* be checked with IS_ERR() for errors.
*/
static struct cfg802154_registered_device *
cfg802154_get_dev_from_info(struct net *netns, struct genl_info *info)
{
return __cfg802154_rdev_from_attrs(netns, info->attrs);
}
/* policy for the attributes */
static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
[NL802154_ATTR_WPAN_PHY] = { .type = NLA_U32 },
[NL802154_ATTR_WPAN_PHY_NAME] = { .type = NLA_NUL_STRING,
.len = 20-1 },
[NL802154_ATTR_IFINDEX] = { .type = NLA_U32 },
[NL802154_ATTR_IFTYPE] = { .type = NLA_U32 },
[NL802154_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
[NL802154_ATTR_WPAN_DEV] = { .type = NLA_U64 },
[NL802154_ATTR_PAGE] = { .type = NLA_U8, },
[NL802154_ATTR_CHANNEL] = { .type = NLA_U8, },
[NL802154_ATTR_TX_POWER] = { .type = NLA_S32, },
[NL802154_ATTR_CCA_MODE] = { .type = NLA_U32, },
[NL802154_ATTR_CCA_OPT] = { .type = NLA_U32, },
[NL802154_ATTR_CCA_ED_LEVEL] = { .type = NLA_S32, },
[NL802154_ATTR_SUPPORTED_CHANNEL] = { .type = NLA_U32, },
[NL802154_ATTR_PAN_ID] = { .type = NLA_U16, },
[NL802154_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
[NL802154_ATTR_SHORT_ADDR] = { .type = NLA_U16, },
[NL802154_ATTR_MIN_BE] = { .type = NLA_U8, },
[NL802154_ATTR_MAX_BE] = { .type = NLA_U8, },
[NL802154_ATTR_MAX_CSMA_BACKOFFS] = { .type = NLA_U8, },
[NL802154_ATTR_MAX_FRAME_RETRIES] = { .type = NLA_S8, },
[NL802154_ATTR_LBT_MODE] = { .type = NLA_U8, },
[NL802154_ATTR_WPAN_PHY_CAPS] = { .type = NLA_NESTED },
[NL802154_ATTR_SUPPORTED_COMMANDS] = { .type = NLA_NESTED },
[NL802154_ATTR_ACKREQ_DEFAULT] = { .type = NLA_U8 },
[NL802154_ATTR_PID] = { .type = NLA_U32 },
[NL802154_ATTR_NETNS_FD] = { .type = NLA_U32 },
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
[NL802154_ATTR_SEC_ENABLED] = { .type = NLA_U8, },
[NL802154_ATTR_SEC_OUT_LEVEL] = { .type = NLA_U32, },
[NL802154_ATTR_SEC_OUT_KEY_ID] = { .type = NLA_NESTED, },
[NL802154_ATTR_SEC_FRAME_COUNTER] = { .type = NLA_U32 },
[NL802154_ATTR_SEC_LEVEL] = { .type = NLA_NESTED },
[NL802154_ATTR_SEC_DEVICE] = { .type = NLA_NESTED },
[NL802154_ATTR_SEC_DEVKEY] = { .type = NLA_NESTED },
[NL802154_ATTR_SEC_KEY] = { .type = NLA_NESTED },
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
};
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
static int
nl802154_prepare_wpan_dev_dump(struct sk_buff *skb,
struct netlink_callback *cb,
struct cfg802154_registered_device **rdev,
struct wpan_dev **wpan_dev)
{
int err;
rtnl_lock();
if (!cb->args[0]) {
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl802154_fam.hdrsize,
genl_family_attrbuf(&nl802154_fam),
nl802154_fam.maxattr, nl802154_policy, NULL);
if (err)
goto out_unlock;
*wpan_dev = __cfg802154_wpan_dev_from_attrs(sock_net(skb->sk),
genl_family_attrbuf(&nl802154_fam));
if (IS_ERR(*wpan_dev)) {
err = PTR_ERR(*wpan_dev);
goto out_unlock;
}
*rdev = wpan_phy_to_rdev((*wpan_dev)->wpan_phy);
/* 0 is the first index - add 1 to parse only once */
cb->args[0] = (*rdev)->wpan_phy_idx + 1;
cb->args[1] = (*wpan_dev)->identifier;
} else {
/* subtract the 1 again here */
struct wpan_phy *wpan_phy = wpan_phy_idx_to_wpan_phy(cb->args[0] - 1);
struct wpan_dev *tmp;
if (!wpan_phy) {
err = -ENODEV;
goto out_unlock;
}
*rdev = wpan_phy_to_rdev(wpan_phy);
*wpan_dev = NULL;
list_for_each_entry(tmp, &(*rdev)->wpan_dev_list, list) {
if (tmp->identifier == cb->args[1]) {
*wpan_dev = tmp;
break;
}
}
if (!*wpan_dev) {
err = -ENODEV;
goto out_unlock;
}
}
return 0;
out_unlock:
rtnl_unlock();
return err;
}
static void
nl802154_finish_wpan_dev_dump(struct cfg802154_registered_device *rdev)
{
rtnl_unlock();
}
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
/* message building helper */
static inline void *nl802154hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
int flags, u8 cmd)
{
/* since there is no private header just add the generic one */
return genlmsg_put(skb, portid, seq, &nl802154_fam, flags, cmd);
}
static int
nl802154_put_flags(struct sk_buff *msg, int attr, u32 mask)
{
struct nlattr *nl_flags = nla_nest_start(msg, attr);
int i;
if (!nl_flags)
return -ENOBUFS;
i = 0;
while (mask) {
if ((mask & 1) && nla_put_flag(msg, i))
return -ENOBUFS;
mask >>= 1;
i++;
}
nla_nest_end(msg, nl_flags);
return 0;
}
static int
nl802154_send_wpan_phy_channels(struct cfg802154_registered_device *rdev,
struct sk_buff *msg)
{
struct nlattr *nl_page;
unsigned long page;
nl_page = nla_nest_start(msg, NL802154_ATTR_CHANNELS_SUPPORTED);
if (!nl_page)
return -ENOBUFS;
for (page = 0; page <= IEEE802154_MAX_PAGE; page++) {
if (nla_put_u32(msg, NL802154_ATTR_SUPPORTED_CHANNEL,
rdev->wpan_phy.supported.channels[page]))
return -ENOBUFS;
}
nla_nest_end(msg, nl_page);
return 0;
}
static int
nl802154_put_capabilities(struct sk_buff *msg,
struct cfg802154_registered_device *rdev)
{
const struct wpan_phy_supported *caps = &rdev->wpan_phy.supported;
struct nlattr *nl_caps, *nl_channels;
int i;
nl_caps = nla_nest_start(msg, NL802154_ATTR_WPAN_PHY_CAPS);
if (!nl_caps)
return -ENOBUFS;
nl_channels = nla_nest_start(msg, NL802154_CAP_ATTR_CHANNELS);
if (!nl_channels)
return -ENOBUFS;
for (i = 0; i <= IEEE802154_MAX_PAGE; i++) {
if (caps->channels[i]) {
if (nl802154_put_flags(msg, i, caps->channels[i]))
return -ENOBUFS;
}
}
nla_nest_end(msg, nl_channels);
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
struct nlattr *nl_ed_lvls;
nl_ed_lvls = nla_nest_start(msg,
NL802154_CAP_ATTR_CCA_ED_LEVELS);
if (!nl_ed_lvls)
return -ENOBUFS;
for (i = 0; i < caps->cca_ed_levels_size; i++) {
if (nla_put_s32(msg, i, caps->cca_ed_levels[i]))
return -ENOBUFS;
}
nla_nest_end(msg, nl_ed_lvls);
}
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER) {
struct nlattr *nl_tx_pwrs;
nl_tx_pwrs = nla_nest_start(msg, NL802154_CAP_ATTR_TX_POWERS);
if (!nl_tx_pwrs)
return -ENOBUFS;
for (i = 0; i < caps->tx_powers_size; i++) {
if (nla_put_s32(msg, i, caps->tx_powers[i]))
return -ENOBUFS;
}
nla_nest_end(msg, nl_tx_pwrs);
}
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE) {
if (nl802154_put_flags(msg, NL802154_CAP_ATTR_CCA_MODES,
caps->cca_modes) ||
nl802154_put_flags(msg, NL802154_CAP_ATTR_CCA_OPTS,
caps->cca_opts))
return -ENOBUFS;
}
if (nla_put_u8(msg, NL802154_CAP_ATTR_MIN_MINBE, caps->min_minbe) ||
nla_put_u8(msg, NL802154_CAP_ATTR_MAX_MINBE, caps->max_minbe) ||
nla_put_u8(msg, NL802154_CAP_ATTR_MIN_MAXBE, caps->min_maxbe) ||
nla_put_u8(msg, NL802154_CAP_ATTR_MAX_MAXBE, caps->max_maxbe) ||
nla_put_u8(msg, NL802154_CAP_ATTR_MIN_CSMA_BACKOFFS,
caps->min_csma_backoffs) ||
nla_put_u8(msg, NL802154_CAP_ATTR_MAX_CSMA_BACKOFFS,
caps->max_csma_backoffs) ||
nla_put_s8(msg, NL802154_CAP_ATTR_MIN_FRAME_RETRIES,
caps->min_frame_retries) ||
nla_put_s8(msg, NL802154_CAP_ATTR_MAX_FRAME_RETRIES,
caps->max_frame_retries) ||
nl802154_put_flags(msg, NL802154_CAP_ATTR_IFTYPES,
caps->iftypes) ||
nla_put_u32(msg, NL802154_CAP_ATTR_LBT, caps->lbt))
return -ENOBUFS;
nla_nest_end(msg, nl_caps);
return 0;
}
static int nl802154_send_wpan_phy(struct cfg802154_registered_device *rdev,
enum nl802154_commands cmd,
struct sk_buff *msg, u32 portid, u32 seq,
int flags)
{
struct nlattr *nl_cmds;
void *hdr;
int i;
hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
if (!hdr)
return -ENOBUFS;
if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
nla_put_string(msg, NL802154_ATTR_WPAN_PHY_NAME,
wpan_phy_name(&rdev->wpan_phy)) ||
nla_put_u32(msg, NL802154_ATTR_GENERATION,
cfg802154_rdev_list_generation))
goto nla_put_failure;
if (cmd != NL802154_CMD_NEW_WPAN_PHY)
goto finish;
/* DUMP PHY PIB */
/* current channel settings */
if (nla_put_u8(msg, NL802154_ATTR_PAGE,
rdev->wpan_phy.current_page) ||
nla_put_u8(msg, NL802154_ATTR_CHANNEL,
rdev->wpan_phy.current_channel))
goto nla_put_failure;
/* TODO remove this behaviour, we still keep support it for a while
* so users can change the behaviour to the new one.
*/
if (nl802154_send_wpan_phy_channels(rdev, msg))
goto nla_put_failure;
/* cca mode */
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE) {
if (nla_put_u32(msg, NL802154_ATTR_CCA_MODE,
rdev->wpan_phy.cca.mode))
goto nla_put_failure;
if (rdev->wpan_phy.cca.mode == NL802154_CCA_ENERGY_CARRIER) {
if (nla_put_u32(msg, NL802154_ATTR_CCA_OPT,
rdev->wpan_phy.cca.opt))
goto nla_put_failure;
}
}
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER) {
if (nla_put_s32(msg, NL802154_ATTR_TX_POWER,
rdev->wpan_phy.transmit_power))
goto nla_put_failure;
}
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
if (nla_put_s32(msg, NL802154_ATTR_CCA_ED_LEVEL,
rdev->wpan_phy.cca_ed_level))
goto nla_put_failure;
}
if (nl802154_put_capabilities(msg, rdev))
goto nla_put_failure;
nl_cmds = nla_nest_start(msg, NL802154_ATTR_SUPPORTED_COMMANDS);
if (!nl_cmds)
goto nla_put_failure;
i = 0;
#define CMD(op, n) \
do { \
if (rdev->ops->op) { \
i++; \
if (nla_put_u32(msg, i, NL802154_CMD_ ## n)) \
goto nla_put_failure; \
} \
} while (0)
CMD(add_virtual_intf, NEW_INTERFACE);
CMD(del_virtual_intf, DEL_INTERFACE);
CMD(set_channel, SET_CHANNEL);
CMD(set_pan_id, SET_PAN_ID);
CMD(set_short_addr, SET_SHORT_ADDR);
CMD(set_backoff_exponent, SET_BACKOFF_EXPONENT);
CMD(set_max_csma_backoffs, SET_MAX_CSMA_BACKOFFS);
CMD(set_max_frame_retries, SET_MAX_FRAME_RETRIES);
CMD(set_lbt_mode, SET_LBT_MODE);
CMD(set_ackreq_default, SET_ACKREQ_DEFAULT);
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER)
CMD(set_tx_power, SET_TX_POWER);
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL)
CMD(set_cca_ed_level, SET_CCA_ED_LEVEL);
if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE)
CMD(set_cca_mode, SET_CCA_MODE);
#undef CMD
nla_nest_end(msg, nl_cmds);
finish:
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
struct nl802154_dump_wpan_phy_state {
s64 filter_wpan_phy;
long start;
};
static int nl802154_dump_wpan_phy_parse(struct sk_buff *skb,
struct netlink_callback *cb,
struct nl802154_dump_wpan_phy_state *state)
{
struct nlattr **tb = genl_family_attrbuf(&nl802154_fam);
int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl802154_fam.hdrsize, tb,
nl802154_fam.maxattr, nl802154_policy, NULL);
/* TODO check if we can handle error here,
* we have no backward compatibility
*/
if (ret)
return 0;
if (tb[NL802154_ATTR_WPAN_PHY])
state->filter_wpan_phy = nla_get_u32(tb[NL802154_ATTR_WPAN_PHY]);
if (tb[NL802154_ATTR_WPAN_DEV])
state->filter_wpan_phy = nla_get_u64(tb[NL802154_ATTR_WPAN_DEV]) >> 32;
if (tb[NL802154_ATTR_IFINDEX]) {
struct net_device *netdev;
struct cfg802154_registered_device *rdev;
int ifidx = nla_get_u32(tb[NL802154_ATTR_IFINDEX]);
netdev = __dev_get_by_index(&init_net, ifidx);
if (!netdev)
return -ENODEV;
if (netdev->ieee802154_ptr) {
rdev = wpan_phy_to_rdev(
netdev->ieee802154_ptr->wpan_phy);
state->filter_wpan_phy = rdev->wpan_phy_idx;
}
}
return 0;
}
static int
nl802154_dump_wpan_phy(struct sk_buff *skb, struct netlink_callback *cb)
{
int idx = 0, ret;
struct nl802154_dump_wpan_phy_state *state = (void *)cb->args[0];
struct cfg802154_registered_device *rdev;
rtnl_lock();
if (!state) {
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state) {
rtnl_unlock();
return -ENOMEM;
}
state->filter_wpan_phy = -1;
ret = nl802154_dump_wpan_phy_parse(skb, cb, state);
if (ret) {
kfree(state);
rtnl_unlock();
return ret;
}
cb->args[0] = (long)state;
}
list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
continue;
if (++idx <= state->start)
continue;
if (state->filter_wpan_phy != -1 &&
state->filter_wpan_phy != rdev->wpan_phy_idx)
continue;
/* attempt to fit multiple wpan_phy data chunks into the skb */
ret = nl802154_send_wpan_phy(rdev,
NL802154_CMD_NEW_WPAN_PHY,
skb,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI);
if (ret < 0) {
if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
!skb->len && cb->min_dump_alloc < 4096) {
cb->min_dump_alloc = 4096;
rtnl_unlock();
return 1;
}
idx--;
break;
}
break;
}
rtnl_unlock();
state->start = idx;
return skb->len;
}
static int nl802154_dump_wpan_phy_done(struct netlink_callback *cb)
{
kfree((void *)cb->args[0]);
return 0;
}
static int nl802154_get_wpan_phy(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
struct cfg802154_registered_device *rdev = info->user_ptr[0];
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
if (nl802154_send_wpan_phy(rdev, NL802154_CMD_NEW_WPAN_PHY, msg,
info->snd_portid, info->snd_seq, 0) < 0) {
nlmsg_free(msg);
return -ENOBUFS;
}
return genlmsg_reply(msg, info);
}
static inline u64 wpan_dev_id(struct wpan_dev *wpan_dev)
{
return (u64)wpan_dev->identifier |
((u64)wpan_phy_to_rdev(wpan_dev->wpan_phy)->wpan_phy_idx << 32);
}
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
#include <net/ieee802154_netdev.h>
static int
ieee802154_llsec_send_key_id(struct sk_buff *msg,
const struct ieee802154_llsec_key_id *desc)
{
struct nlattr *nl_dev_addr;
if (nla_put_u32(msg, NL802154_KEY_ID_ATTR_MODE, desc->mode))
return -ENOBUFS;
switch (desc->mode) {
case NL802154_KEY_ID_MODE_IMPLICIT:
nl_dev_addr = nla_nest_start(msg, NL802154_KEY_ID_ATTR_IMPLICIT);
if (!nl_dev_addr)
return -ENOBUFS;
if (nla_put_le16(msg, NL802154_DEV_ADDR_ATTR_PAN_ID,
desc->device_addr.pan_id) ||
nla_put_u32(msg, NL802154_DEV_ADDR_ATTR_MODE,
desc->device_addr.mode))
return -ENOBUFS;
switch (desc->device_addr.mode) {
case NL802154_DEV_ADDR_SHORT:
if (nla_put_le16(msg, NL802154_DEV_ADDR_ATTR_SHORT,
desc->device_addr.short_addr))
return -ENOBUFS;
break;
case NL802154_DEV_ADDR_EXTENDED:
if (nla_put_le64(msg, NL802154_DEV_ADDR_ATTR_EXTENDED,
desc->device_addr.extended_addr,
NL802154_DEV_ADDR_ATTR_PAD))
return -ENOBUFS;
break;
default:
/* userspace should handle unknown */
break;
}
nla_nest_end(msg, nl_dev_addr);
break;
case NL802154_KEY_ID_MODE_INDEX:
break;
case NL802154_KEY_ID_MODE_INDEX_SHORT:
/* TODO renmae short_source? */
if (nla_put_le32(msg, NL802154_KEY_ID_ATTR_SOURCE_SHORT,
desc->short_source))
return -ENOBUFS;
break;
case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
if (nla_put_le64(msg, NL802154_KEY_ID_ATTR_SOURCE_EXTENDED,
desc->extended_source,
NL802154_KEY_ID_ATTR_PAD))
return -ENOBUFS;
break;
default:
/* userspace should handle unknown */
break;
}
/* TODO key_id to key_idx ? Check naming */
if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
if (nla_put_u8(msg, NL802154_KEY_ID_ATTR_INDEX, desc->id))
return -ENOBUFS;
}
return 0;
}
static int nl802154_get_llsec_params(struct sk_buff *msg,
struct cfg802154_registered_device *rdev,
struct wpan_dev *wpan_dev)
{
struct nlattr *nl_key_id;
struct ieee802154_llsec_params params;
int ret;
ret = rdev_get_llsec_params(rdev, wpan_dev, &params);
if (ret < 0)
return ret;
if (nla_put_u8(msg, NL802154_ATTR_SEC_ENABLED, params.enabled) ||
nla_put_u32(msg, NL802154_ATTR_SEC_OUT_LEVEL, params.out_level) ||
nla_put_be32(msg, NL802154_ATTR_SEC_FRAME_COUNTER,
params.frame_counter))
return -ENOBUFS;
nl_key_id = nla_nest_start(msg, NL802154_ATTR_SEC_OUT_KEY_ID);
if (!nl_key_id)
return -ENOBUFS;
ret = ieee802154_llsec_send_key_id(msg, &params.out_key);
if (ret < 0)
return ret;
nla_nest_end(msg, nl_key_id);
return 0;
}
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
static int
nl802154_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
struct cfg802154_registered_device *rdev,
struct wpan_dev *wpan_dev)
{
struct net_device *dev = wpan_dev->netdev;
void *hdr;
hdr = nl802154hdr_put(msg, portid, seq, flags,
NL802154_CMD_NEW_INTERFACE);
if (!hdr)
return -1;
if (dev &&
(nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex) ||
nla_put_string(msg, NL802154_ATTR_IFNAME, dev->name)))
goto nla_put_failure;
if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
nla_put_u32(msg, NL802154_ATTR_IFTYPE, wpan_dev->iftype) ||
nla_put_u64_64bit(msg, NL802154_ATTR_WPAN_DEV,
wpan_dev_id(wpan_dev), NL802154_ATTR_PAD) ||
nla_put_u32(msg, NL802154_ATTR_GENERATION,
rdev->devlist_generation ^
(cfg802154_rdev_list_generation << 2)))
goto nla_put_failure;
/* address settings */
if (nla_put_le64(msg, NL802154_ATTR_EXTENDED_ADDR,
wpan_dev->extended_addr,
NL802154_ATTR_PAD) ||
nla_put_le16(msg, NL802154_ATTR_SHORT_ADDR,
wpan_dev->short_addr) ||
nla_put_le16(msg, NL802154_ATTR_PAN_ID, wpan_dev->pan_id))
goto nla_put_failure;
/* ARET handling */
if (nla_put_s8(msg, NL802154_ATTR_MAX_FRAME_RETRIES,
wpan_dev->frame_retries) ||
nla_put_u8(msg, NL802154_ATTR_MAX_BE, wpan_dev->max_be) ||
nla_put_u8(msg, NL802154_ATTR_MAX_CSMA_BACKOFFS,
wpan_dev->csma_retries) ||
nla_put_u8(msg, NL802154_ATTR_MIN_BE, wpan_dev->min_be))
goto nla_put_failure;
/* listen before transmit */
if (nla_put_u8(msg, NL802154_ATTR_LBT_MODE, wpan_dev->lbt))
goto nla_put_failure;
/* ackreq default behaviour */
if (nla_put_u8(msg, NL802154_ATTR_ACKREQ_DEFAULT, wpan_dev->ackreq))
goto nla_put_failure;
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
if (nl802154_get_llsec_params(msg, rdev, wpan_dev) < 0)
goto nla_put_failure;
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int
nl802154_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
{
int wp_idx = 0;
int if_idx = 0;
int wp_start = cb->args[0];
int if_start = cb->args[1];
struct cfg802154_registered_device *rdev;
struct wpan_dev *wpan_dev;
rtnl_lock();
list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
continue;
if (wp_idx < wp_start) {
wp_idx++;
continue;
}
if_idx = 0;
list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
if (if_idx < if_start) {
if_idx++;
continue;
}
if (nl802154_send_iface(skb, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
rdev, wpan_dev) < 0) {
goto out;
}
if_idx++;
}
wp_idx++;
}
out:
rtnl_unlock();
cb->args[0] = wp_idx;
cb->args[1] = if_idx;
return skb->len;
}
static int nl802154_get_interface(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct wpan_dev *wdev = info->user_ptr[1];
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
if (nl802154_send_iface(msg, info->snd_portid, info->snd_seq, 0,
rdev, wdev) < 0) {
nlmsg_free(msg);
return -ENOBUFS;
}
return genlmsg_reply(msg, info);
}
static int nl802154_new_interface(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
enum nl802154_iftype type = NL802154_IFTYPE_UNSPEC;
__le64 extended_addr = cpu_to_le64(0x0000000000000000ULL);
/* TODO avoid failing a new interface
* creation due to pending removal?
*/
if (!info->attrs[NL802154_ATTR_IFNAME])
return -EINVAL;
if (info->attrs[NL802154_ATTR_IFTYPE]) {
type = nla_get_u32(info->attrs[NL802154_ATTR_IFTYPE]);
if (type > NL802154_IFTYPE_MAX ||
!(rdev->wpan_phy.supported.iftypes & BIT(type)))
return -EINVAL;
}
if (info->attrs[NL802154_ATTR_EXTENDED_ADDR])
extended_addr = nla_get_le64(info->attrs[NL802154_ATTR_EXTENDED_ADDR]);
if (!rdev->ops->add_virtual_intf)
return -EOPNOTSUPP;
return rdev_add_virtual_intf(rdev,
nla_data(info->attrs[NL802154_ATTR_IFNAME]),
NET_NAME_USER, type, extended_addr);
}
static int nl802154_del_interface(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct wpan_dev *wpan_dev = info->user_ptr[1];
if (!rdev->ops->del_virtual_intf)
return -EOPNOTSUPP;
/* If we remove a wpan device without a netdev then clear
* user_ptr[1] so that nl802154_post_doit won't dereference it
* to check if it needs to do dev_put(). Otherwise it crashes
* since the wpan_dev has been freed, unlike with a netdev where
* we need the dev_put() for the netdev to really be freed.
*/
if (!wpan_dev->netdev)
info->user_ptr[1] = NULL;
return rdev_del_virtual_intf(rdev, wpan_dev);
}
static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
u8 channel, page;
if (!info->attrs[NL802154_ATTR_PAGE] ||
!info->attrs[NL802154_ATTR_CHANNEL])
return -EINVAL;
page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]);
/* check 802.15.4 constraints */
if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL ||
!(rdev->wpan_phy.supported.channels[page] & BIT(channel)))
return -EINVAL;
return rdev_set_channel(rdev, page, channel);
}
static int nl802154_set_cca_mode(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct wpan_phy_cca cca;
if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE))
return -EOPNOTSUPP;
if (!info->attrs[NL802154_ATTR_CCA_MODE])
return -EINVAL;
cca.mode = nla_get_u32(info->attrs[NL802154_ATTR_CCA_MODE]);
/* checking 802.15.4 constraints */
if (cca.mode < NL802154_CCA_ENERGY ||
cca.mode > NL802154_CCA_ATTR_MAX ||
!(rdev->wpan_phy.supported.cca_modes & BIT(cca.mode)))
return -EINVAL;
if (cca.mode == NL802154_CCA_ENERGY_CARRIER) {
if (!info->attrs[NL802154_ATTR_CCA_OPT])
return -EINVAL;
cca.opt = nla_get_u32(info->attrs[NL802154_ATTR_CCA_OPT]);
if (cca.opt > NL802154_CCA_OPT_ATTR_MAX ||
!(rdev->wpan_phy.supported.cca_opts & BIT(cca.opt)))
return -EINVAL;
}
return rdev_set_cca_mode(rdev, &cca);
}
static int nl802154_set_cca_ed_level(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
s32 ed_level;
int i;
if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL))
return -EOPNOTSUPP;
if (!info->attrs[NL802154_ATTR_CCA_ED_LEVEL])
return -EINVAL;
ed_level = nla_get_s32(info->attrs[NL802154_ATTR_CCA_ED_LEVEL]);
for (i = 0; i < rdev->wpan_phy.supported.cca_ed_levels_size; i++) {
if (ed_level == rdev->wpan_phy.supported.cca_ed_levels[i])
return rdev_set_cca_ed_level(rdev, ed_level);
}
return -EINVAL;
}
static int nl802154_set_tx_power(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
s32 power;
int i;
if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER))
return -EOPNOTSUPP;
if (!info->attrs[NL802154_ATTR_TX_POWER])
return -EINVAL;
power = nla_get_s32(info->attrs[NL802154_ATTR_TX_POWER]);
for (i = 0; i < rdev->wpan_phy.supported.tx_powers_size; i++) {
if (power == rdev->wpan_phy.supported.tx_powers[i])
return rdev_set_tx_power(rdev, power);
}
return -EINVAL;
}
static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
__le16 pan_id;
/* conflict here while tx/rx calls */
if (netif_running(dev))
return -EBUSY;
if (wpan_dev->lowpan_dev) {
if (netif_running(wpan_dev->lowpan_dev))
return -EBUSY;
}
/* don't change address fields on monitor */
if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
!info->attrs[NL802154_ATTR_PAN_ID])
return -EINVAL;
pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]);
/* TODO
* I am not sure about to check here on broadcast pan_id.
* Broadcast is a valid setting, comment from 802.15.4:
* If this value is 0xffff, the device is not associated.
*
* This could useful to simple deassociate an device.
*/
if (pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST))
return -EINVAL;
return rdev_set_pan_id(rdev, wpan_dev, pan_id);
}
static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
__le16 short_addr;
/* conflict here while tx/rx calls */
if (netif_running(dev))
return -EBUSY;
if (wpan_dev->lowpan_dev) {
if (netif_running(wpan_dev->lowpan_dev))
return -EBUSY;
}
/* don't change address fields on monitor */
if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
!info->attrs[NL802154_ATTR_SHORT_ADDR])
return -EINVAL;
short_addr = nla_get_le16(info->attrs[NL802154_ATTR_SHORT_ADDR]);
/* TODO
* I am not sure about to check here on broadcast short_addr.
* Broadcast is a valid setting, comment from 802.15.4:
* A value of 0xfffe indicates that the device has
* associated but has not been allocated an address. A
* value of 0xffff indicates that the device does not
* have a short address.
*
* I think we should allow to set these settings but
* don't allow to allow socket communication with it.
*/
if (short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC) ||
short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST))
return -EINVAL;
return rdev_set_short_addr(rdev, wpan_dev, short_addr);
}
static int
nl802154_set_backoff_exponent(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
u8 min_be, max_be;
/* should be set on netif open inside phy settings */
if (netif_running(dev))
return -EBUSY;
if (!info->attrs[NL802154_ATTR_MIN_BE] ||
!info->attrs[NL802154_ATTR_MAX_BE])
return -EINVAL;
min_be = nla_get_u8(info->attrs[NL802154_ATTR_MIN_BE]);
max_be = nla_get_u8(info->attrs[NL802154_ATTR_MAX_BE]);
/* check 802.15.4 constraints */
if (min_be < rdev->wpan_phy.supported.min_minbe ||
min_be > rdev->wpan_phy.supported.max_minbe ||
max_be < rdev->wpan_phy.supported.min_maxbe ||
max_be > rdev->wpan_phy.supported.max_maxbe ||
min_be > max_be)
return -EINVAL;
return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be);
}
static int
nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
u8 max_csma_backoffs;
/* conflict here while other running iface settings */
if (netif_running(dev))
return -EBUSY;
if (!info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS])
return -EINVAL;
max_csma_backoffs = nla_get_u8(
info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]);
/* check 802.15.4 constraints */
if (max_csma_backoffs < rdev->wpan_phy.supported.min_csma_backoffs ||
max_csma_backoffs > rdev->wpan_phy.supported.max_csma_backoffs)
return -EINVAL;
return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs);
}
static int
nl802154_set_max_frame_retries(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
s8 max_frame_retries;
if (netif_running(dev))
return -EBUSY;
if (!info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES])
return -EINVAL;
max_frame_retries = nla_get_s8(
info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES]);
/* check 802.15.4 constraints */
if (max_frame_retries < rdev->wpan_phy.supported.min_frame_retries ||
max_frame_retries > rdev->wpan_phy.supported.max_frame_retries)
return -EINVAL;
return rdev_set_max_frame_retries(rdev, wpan_dev, max_frame_retries);
}
static int nl802154_set_lbt_mode(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
int mode;
if (netif_running(dev))
return -EBUSY;
if (!info->attrs[NL802154_ATTR_LBT_MODE])
return -EINVAL;
mode = nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]);
if (mode != 0 && mode != 1)
return -EINVAL;
if (!wpan_phy_supported_bool(mode, rdev->wpan_phy.supported.lbt))
return -EINVAL;
return rdev_set_lbt_mode(rdev, wpan_dev, mode);
}
static int
nl802154_set_ackreq_default(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
int ackreq;
if (netif_running(dev))
return -EBUSY;
if (!info->attrs[NL802154_ATTR_ACKREQ_DEFAULT])
return -EINVAL;
ackreq = nla_get_u8(info->attrs[NL802154_ATTR_ACKREQ_DEFAULT]);
if (ackreq != 0 && ackreq != 1)
return -EINVAL;
return rdev_set_ackreq_default(rdev, wpan_dev, ackreq);
}
static int nl802154_wpan_phy_netns(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net *net;
int err;
if (info->attrs[NL802154_ATTR_PID]) {
u32 pid = nla_get_u32(info->attrs[NL802154_ATTR_PID]);
net = get_net_ns_by_pid(pid);
} else if (info->attrs[NL802154_ATTR_NETNS_FD]) {
u32 fd = nla_get_u32(info->attrs[NL802154_ATTR_NETNS_FD]);
net = get_net_ns_by_fd(fd);
} else {
return -EINVAL;
}
if (IS_ERR(net))
return PTR_ERR(net);
err = 0;
/* check if anything to do */
if (!net_eq(wpan_phy_net(&rdev->wpan_phy), net))
err = cfg802154_switch_netns(rdev, net);
put_net(net);
return err;
}
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
static const struct nla_policy nl802154_dev_addr_policy[NL802154_DEV_ADDR_ATTR_MAX + 1] = {
[NL802154_DEV_ADDR_ATTR_PAN_ID] = { .type = NLA_U16 },
[NL802154_DEV_ADDR_ATTR_MODE] = { .type = NLA_U32 },
[NL802154_DEV_ADDR_ATTR_SHORT] = { .type = NLA_U16 },
[NL802154_DEV_ADDR_ATTR_EXTENDED] = { .type = NLA_U64 },
};
static int
ieee802154_llsec_parse_dev_addr(struct nlattr *nla,
struct ieee802154_addr *addr)
{
struct nlattr *attrs[NL802154_DEV_ADDR_ATTR_MAX + 1];
if (!nla || nla_parse_nested(attrs, NL802154_DEV_ADDR_ATTR_MAX, nla,
nl802154_dev_addr_policy, NULL))
return -EINVAL;
if (!attrs[NL802154_DEV_ADDR_ATTR_PAN_ID] ||
!attrs[NL802154_DEV_ADDR_ATTR_MODE] ||
!(attrs[NL802154_DEV_ADDR_ATTR_SHORT] ||
attrs[NL802154_DEV_ADDR_ATTR_EXTENDED]))
return -EINVAL;
addr->pan_id = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_PAN_ID]);
addr->mode = nla_get_u32(attrs[NL802154_DEV_ADDR_ATTR_MODE]);
switch (addr->mode) {
case NL802154_DEV_ADDR_SHORT:
addr->short_addr = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_SHORT]);
break;
case NL802154_DEV_ADDR_EXTENDED:
addr->extended_addr = nla_get_le64(attrs[NL802154_DEV_ADDR_ATTR_EXTENDED]);
break;
default:
return -EINVAL;
}
return 0;
}
static const struct nla_policy nl802154_key_id_policy[NL802154_KEY_ID_ATTR_MAX + 1] = {
[NL802154_KEY_ID_ATTR_MODE] = { .type = NLA_U32 },
[NL802154_KEY_ID_ATTR_INDEX] = { .type = NLA_U8 },
[NL802154_KEY_ID_ATTR_IMPLICIT] = { .type = NLA_NESTED },
[NL802154_KEY_ID_ATTR_SOURCE_SHORT] = { .type = NLA_U32 },
[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED] = { .type = NLA_U64 },
};
static int
ieee802154_llsec_parse_key_id(struct nlattr *nla,
struct ieee802154_llsec_key_id *desc)
{
struct nlattr *attrs[NL802154_KEY_ID_ATTR_MAX + 1];
if (!nla || nla_parse_nested(attrs, NL802154_KEY_ID_ATTR_MAX, nla,
nl802154_key_id_policy, NULL))
return -EINVAL;
if (!attrs[NL802154_KEY_ID_ATTR_MODE])
return -EINVAL;
desc->mode = nla_get_u32(attrs[NL802154_KEY_ID_ATTR_MODE]);
switch (desc->mode) {
case NL802154_KEY_ID_MODE_IMPLICIT:
if (!attrs[NL802154_KEY_ID_ATTR_IMPLICIT])
return -EINVAL;
if (ieee802154_llsec_parse_dev_addr(attrs[NL802154_KEY_ID_ATTR_IMPLICIT],
&desc->device_addr) < 0)
return -EINVAL;
break;
case NL802154_KEY_ID_MODE_INDEX:
break;
case NL802154_KEY_ID_MODE_INDEX_SHORT:
if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT])
return -EINVAL;
desc->short_source = nla_get_le32(attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT]);
break;
case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED])
return -EINVAL;
desc->extended_source = nla_get_le64(attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED]);
break;
default:
return -EINVAL;
}
if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
if (!attrs[NL802154_KEY_ID_ATTR_INDEX])
return -EINVAL;
/* TODO change id to idx */
desc->id = nla_get_u8(attrs[NL802154_KEY_ID_ATTR_INDEX]);
}
return 0;
}
static int nl802154_set_llsec_params(struct sk_buff *skb,
struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct ieee802154_llsec_params params;
u32 changed = 0;
int ret;
if (info->attrs[NL802154_ATTR_SEC_ENABLED]) {
u8 enabled;
enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
if (enabled != 0 && enabled != 1)
return -EINVAL;
params.enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
changed |= IEEE802154_LLSEC_PARAM_ENABLED;
}
if (info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID]) {
ret = ieee802154_llsec_parse_key_id(info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID],
&params.out_key);
if (ret < 0)
return ret;
changed |= IEEE802154_LLSEC_PARAM_OUT_KEY;
}
if (info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]) {
params.out_level = nla_get_u32(info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]);
if (params.out_level > NL802154_SECLEVEL_MAX)
return -EINVAL;
changed |= IEEE802154_LLSEC_PARAM_OUT_LEVEL;
}
if (info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]) {
params.frame_counter = nla_get_be32(info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]);
changed |= IEEE802154_LLSEC_PARAM_FRAME_COUNTER;
}
return rdev_set_llsec_params(rdev, wpan_dev, &params, changed);
}
static int nl802154_send_key(struct sk_buff *msg, u32 cmd, u32 portid,
u32 seq, int flags,
struct cfg802154_registered_device *rdev,
struct net_device *dev,
const struct ieee802154_llsec_key_entry *key)
{
void *hdr;
u32 commands[NL802154_CMD_FRAME_NR_IDS / 32];
struct nlattr *nl_key, *nl_key_id;
hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
if (!hdr)
return -1;
if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
goto nla_put_failure;
nl_key = nla_nest_start(msg, NL802154_ATTR_SEC_KEY);
if (!nl_key)
goto nla_put_failure;
nl_key_id = nla_nest_start(msg, NL802154_KEY_ATTR_ID);
if (!nl_key_id)
goto nla_put_failure;
if (ieee802154_llsec_send_key_id(msg, &key->id) < 0)
goto nla_put_failure;
nla_nest_end(msg, nl_key_id);
if (nla_put_u8(msg, NL802154_KEY_ATTR_USAGE_FRAMES,
key->key->frame_types))
goto nla_put_failure;
if (key->key->frame_types & BIT(NL802154_FRAME_CMD)) {
/* TODO for each nested */
memset(commands, 0, sizeof(commands));
commands[7] = key->key->cmd_frame_ids;
if (nla_put(msg, NL802154_KEY_ATTR_USAGE_CMDS,
sizeof(commands), commands))
goto nla_put_failure;
}
if (nla_put(msg, NL802154_KEY_ATTR_BYTES, NL802154_KEY_SIZE,
key->key->key))
goto nla_put_failure;
nla_nest_end(msg, nl_key);
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int
nl802154_dump_llsec_key(struct sk_buff *skb, struct netlink_callback *cb)
{
struct cfg802154_registered_device *rdev = NULL;
struct ieee802154_llsec_key_entry *key;
struct ieee802154_llsec_table *table;
struct wpan_dev *wpan_dev;
int err;
err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
if (err)
return err;
if (!wpan_dev->netdev) {
err = -EINVAL;
goto out_err;
}
rdev_lock_llsec_table(rdev, wpan_dev);
rdev_get_llsec_table(rdev, wpan_dev, &table);
/* TODO make it like station dump */
if (cb->args[2])
goto out;
list_for_each_entry(key, &table->keys, list) {
if (nl802154_send_key(skb, NL802154_CMD_NEW_SEC_KEY,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
rdev, wpan_dev->netdev, key) < 0) {
/* TODO */
err = -EIO;
rdev_unlock_llsec_table(rdev, wpan_dev);
goto out_err;
}
}
cb->args[2] = 1;
out:
rdev_unlock_llsec_table(rdev, wpan_dev);
err = skb->len;
out_err:
nl802154_finish_wpan_dev_dump(rdev);
return err;
}
static const struct nla_policy nl802154_key_policy[NL802154_KEY_ATTR_MAX + 1] = {
[NL802154_KEY_ATTR_ID] = { NLA_NESTED },
/* TODO handle it as for_each_nested and NLA_FLAG? */
[NL802154_KEY_ATTR_USAGE_FRAMES] = { NLA_U8 },
/* TODO handle it as for_each_nested, not static array? */
[NL802154_KEY_ATTR_USAGE_CMDS] = { .len = NL802154_CMD_FRAME_NR_IDS / 8 },
[NL802154_KEY_ATTR_BYTES] = { .len = NL802154_KEY_SIZE },
};
static int nl802154_add_llsec_key(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
struct ieee802154_llsec_key key = { };
struct ieee802154_llsec_key_id id = { };
u32 commands[NL802154_CMD_FRAME_NR_IDS / 32] = { };
if (nla_parse_nested(attrs, NL802154_KEY_ATTR_MAX,
info->attrs[NL802154_ATTR_SEC_KEY],
nl802154_key_policy, info->extack))
return -EINVAL;
if (!attrs[NL802154_KEY_ATTR_USAGE_FRAMES] ||
!attrs[NL802154_KEY_ATTR_BYTES])
return -EINVAL;
if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
return -ENOBUFS;
key.frame_types = nla_get_u8(attrs[NL802154_KEY_ATTR_USAGE_FRAMES]);
if (key.frame_types > BIT(NL802154_FRAME_MAX) ||
((key.frame_types & BIT(NL802154_FRAME_CMD)) &&
!attrs[NL802154_KEY_ATTR_USAGE_CMDS]))
return -EINVAL;
if (attrs[NL802154_KEY_ATTR_USAGE_CMDS]) {
/* TODO for each nested */
nla_memcpy(commands, attrs[NL802154_KEY_ATTR_USAGE_CMDS],
NL802154_CMD_FRAME_NR_IDS / 8);
/* TODO understand the -EINVAL logic here? last condition */
if (commands[0] || commands[1] || commands[2] || commands[3] ||
commands[4] || commands[5] || commands[6] ||
commands[7] > BIT(NL802154_CMD_FRAME_MAX))
return -EINVAL;
key.cmd_frame_ids = commands[7];
} else {
key.cmd_frame_ids = 0;
}
nla_memcpy(key.key, attrs[NL802154_KEY_ATTR_BYTES], NL802154_KEY_SIZE);
if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
return -ENOBUFS;
return rdev_add_llsec_key(rdev, wpan_dev, &id, &key);
}
static int nl802154_del_llsec_key(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
struct ieee802154_llsec_key_id id;
if (nla_parse_nested(attrs, NL802154_KEY_ATTR_MAX,
info->attrs[NL802154_ATTR_SEC_KEY],
nl802154_key_policy, info->extack))
return -EINVAL;
if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
return -ENOBUFS;
return rdev_del_llsec_key(rdev, wpan_dev, &id);
}
static int nl802154_send_device(struct sk_buff *msg, u32 cmd, u32 portid,
u32 seq, int flags,
struct cfg802154_registered_device *rdev,
struct net_device *dev,
const struct ieee802154_llsec_device *dev_desc)
{
void *hdr;
struct nlattr *nl_device;
hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
if (!hdr)
return -1;
if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
goto nla_put_failure;
nl_device = nla_nest_start(msg, NL802154_ATTR_SEC_DEVICE);
if (!nl_device)
goto nla_put_failure;
if (nla_put_u32(msg, NL802154_DEV_ATTR_FRAME_COUNTER,
dev_desc->frame_counter) ||
nla_put_le16(msg, NL802154_DEV_ATTR_PAN_ID, dev_desc->pan_id) ||
nla_put_le16(msg, NL802154_DEV_ATTR_SHORT_ADDR,
dev_desc->short_addr) ||
nla_put_le64(msg, NL802154_DEV_ATTR_EXTENDED_ADDR,
dev_desc->hwaddr, NL802154_DEV_ATTR_PAD) ||
nla_put_u8(msg, NL802154_DEV_ATTR_SECLEVEL_EXEMPT,
dev_desc->seclevel_exempt) ||
nla_put_u32(msg, NL802154_DEV_ATTR_KEY_MODE, dev_desc->key_mode))
goto nla_put_failure;
nla_nest_end(msg, nl_device);
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int
nl802154_dump_llsec_dev(struct sk_buff *skb, struct netlink_callback *cb)
{
struct cfg802154_registered_device *rdev = NULL;
struct ieee802154_llsec_device *dev;
struct ieee802154_llsec_table *table;
struct wpan_dev *wpan_dev;
int err;
err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
if (err)
return err;
if (!wpan_dev->netdev) {
err = -EINVAL;
goto out_err;
}
rdev_lock_llsec_table(rdev, wpan_dev);
rdev_get_llsec_table(rdev, wpan_dev, &table);
/* TODO make it like station dump */
if (cb->args[2])
goto out;
list_for_each_entry(dev, &table->devices, list) {
if (nl802154_send_device(skb, NL802154_CMD_NEW_SEC_LEVEL,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
rdev, wpan_dev->netdev, dev) < 0) {
/* TODO */
err = -EIO;
rdev_unlock_llsec_table(rdev, wpan_dev);
goto out_err;
}
}
cb->args[2] = 1;
out:
rdev_unlock_llsec_table(rdev, wpan_dev);
err = skb->len;
out_err:
nl802154_finish_wpan_dev_dump(rdev);
return err;
}
static const struct nla_policy nl802154_dev_policy[NL802154_DEV_ATTR_MAX + 1] = {
[NL802154_DEV_ATTR_FRAME_COUNTER] = { NLA_U32 },
[NL802154_DEV_ATTR_PAN_ID] = { .type = NLA_U16 },
[NL802154_DEV_ATTR_SHORT_ADDR] = { .type = NLA_U16 },
[NL802154_DEV_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
[NL802154_DEV_ATTR_SECLEVEL_EXEMPT] = { NLA_U8 },
[NL802154_DEV_ATTR_KEY_MODE] = { NLA_U32 },
};
static int
ieee802154_llsec_parse_device(struct nlattr *nla,
struct ieee802154_llsec_device *dev)
{
struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
if (!nla || nla_parse_nested(attrs, NL802154_DEV_ATTR_MAX,
nla, nl802154_dev_policy, NULL))
return -EINVAL;
memset(dev, 0, sizeof(*dev));
if (!attrs[NL802154_DEV_ATTR_FRAME_COUNTER] ||
!attrs[NL802154_DEV_ATTR_PAN_ID] ||
!attrs[NL802154_DEV_ATTR_SHORT_ADDR] ||
!attrs[NL802154_DEV_ATTR_EXTENDED_ADDR] ||
!attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT] ||
!attrs[NL802154_DEV_ATTR_KEY_MODE])
return -EINVAL;
/* TODO be32 */
dev->frame_counter = nla_get_u32(attrs[NL802154_DEV_ATTR_FRAME_COUNTER]);
dev->pan_id = nla_get_le16(attrs[NL802154_DEV_ATTR_PAN_ID]);
dev->short_addr = nla_get_le16(attrs[NL802154_DEV_ATTR_SHORT_ADDR]);
/* TODO rename hwaddr to extended_addr */
dev->hwaddr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
dev->seclevel_exempt = nla_get_u8(attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT]);
dev->key_mode = nla_get_u32(attrs[NL802154_DEV_ATTR_KEY_MODE]);
if (dev->key_mode > NL802154_DEVKEY_MAX ||
(dev->seclevel_exempt != 0 && dev->seclevel_exempt != 1))
return -EINVAL;
return 0;
}
static int nl802154_add_llsec_dev(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct ieee802154_llsec_device dev_desc;
if (ieee802154_llsec_parse_device(info->attrs[NL802154_ATTR_SEC_DEVICE],
&dev_desc) < 0)
return -EINVAL;
return rdev_add_device(rdev, wpan_dev, &dev_desc);
}
static int nl802154_del_llsec_dev(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
__le64 extended_addr;
if (nla_parse_nested(attrs, NL802154_DEV_ATTR_MAX,
info->attrs[NL802154_ATTR_SEC_DEVICE],
nl802154_dev_policy, info->extack))
return -EINVAL;
if (!attrs[NL802154_DEV_ATTR_EXTENDED_ADDR])
return -EINVAL;
extended_addr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
return rdev_del_device(rdev, wpan_dev, extended_addr);
}
static int nl802154_send_devkey(struct sk_buff *msg, u32 cmd, u32 portid,
u32 seq, int flags,
struct cfg802154_registered_device *rdev,
struct net_device *dev, __le64 extended_addr,
const struct ieee802154_llsec_device_key *devkey)
{
void *hdr;
struct nlattr *nl_devkey, *nl_key_id;
hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
if (!hdr)
return -1;
if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
goto nla_put_failure;
nl_devkey = nla_nest_start(msg, NL802154_ATTR_SEC_DEVKEY);
if (!nl_devkey)
goto nla_put_failure;
if (nla_put_le64(msg, NL802154_DEVKEY_ATTR_EXTENDED_ADDR,
extended_addr, NL802154_DEVKEY_ATTR_PAD) ||
nla_put_u32(msg, NL802154_DEVKEY_ATTR_FRAME_COUNTER,
devkey->frame_counter))
goto nla_put_failure;
nl_key_id = nla_nest_start(msg, NL802154_DEVKEY_ATTR_ID);
if (!nl_key_id)
goto nla_put_failure;
if (ieee802154_llsec_send_key_id(msg, &devkey->key_id) < 0)
goto nla_put_failure;
nla_nest_end(msg, nl_key_id);
nla_nest_end(msg, nl_devkey);
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int
nl802154_dump_llsec_devkey(struct sk_buff *skb, struct netlink_callback *cb)
{
struct cfg802154_registered_device *rdev = NULL;
struct ieee802154_llsec_device_key *kpos;
struct ieee802154_llsec_device *dpos;
struct ieee802154_llsec_table *table;
struct wpan_dev *wpan_dev;
int err;
err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
if (err)
return err;
if (!wpan_dev->netdev) {
err = -EINVAL;
goto out_err;
}
rdev_lock_llsec_table(rdev, wpan_dev);
rdev_get_llsec_table(rdev, wpan_dev, &table);
/* TODO make it like station dump */
if (cb->args[2])
goto out;
/* TODO look if remove devkey and do some nested attribute */
list_for_each_entry(dpos, &table->devices, list) {
list_for_each_entry(kpos, &dpos->keys, list) {
if (nl802154_send_devkey(skb,
NL802154_CMD_NEW_SEC_LEVEL,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI, rdev,
wpan_dev->netdev,
dpos->hwaddr,
kpos) < 0) {
/* TODO */
err = -EIO;
rdev_unlock_llsec_table(rdev, wpan_dev);
goto out_err;
}
}
}
cb->args[2] = 1;
out:
rdev_unlock_llsec_table(rdev, wpan_dev);
err = skb->len;
out_err:
nl802154_finish_wpan_dev_dump(rdev);
return err;
}
static const struct nla_policy nl802154_devkey_policy[NL802154_DEVKEY_ATTR_MAX + 1] = {
[NL802154_DEVKEY_ATTR_FRAME_COUNTER] = { NLA_U32 },
[NL802154_DEVKEY_ATTR_EXTENDED_ADDR] = { NLA_U64 },
[NL802154_DEVKEY_ATTR_ID] = { NLA_NESTED },
};
static int nl802154_add_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
struct ieee802154_llsec_device_key key;
__le64 extended_addr;
if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] ||
nla_parse_nested(attrs, NL802154_DEVKEY_ATTR_MAX,
info->attrs[NL802154_ATTR_SEC_DEVKEY],
nl802154_devkey_policy, info->extack) < 0)
return -EINVAL;
if (!attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER] ||
!attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
return -EINVAL;
/* TODO change key.id ? */
if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
&key.key_id) < 0)
return -ENOBUFS;
/* TODO be32 */
key.frame_counter = nla_get_u32(attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER]);
/* TODO change naming hwaddr -> extended_addr
* check unique identifier short+pan OR extended_addr
*/
extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
return rdev_add_devkey(rdev, wpan_dev, extended_addr, &key);
}
static int nl802154_del_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
struct ieee802154_llsec_device_key key;
__le64 extended_addr;
if (nla_parse_nested(attrs, NL802154_DEVKEY_ATTR_MAX,
info->attrs[NL802154_ATTR_SEC_DEVKEY],
nl802154_devkey_policy, info->extack))
return -EINVAL;
if (!attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
return -EINVAL;
/* TODO change key.id ? */
if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
&key.key_id) < 0)
return -ENOBUFS;
/* TODO change naming hwaddr -> extended_addr
* check unique identifier short+pan OR extended_addr
*/
extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
return rdev_del_devkey(rdev, wpan_dev, extended_addr, &key);
}
static int nl802154_send_seclevel(struct sk_buff *msg, u32 cmd, u32 portid,
u32 seq, int flags,
struct cfg802154_registered_device *rdev,
struct net_device *dev,
const struct ieee802154_llsec_seclevel *sl)
{
void *hdr;
struct nlattr *nl_seclevel;
hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
if (!hdr)
return -1;
if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
goto nla_put_failure;
nl_seclevel = nla_nest_start(msg, NL802154_ATTR_SEC_LEVEL);
if (!nl_seclevel)
goto nla_put_failure;
if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_FRAME, sl->frame_type) ||
nla_put_u32(msg, NL802154_SECLEVEL_ATTR_LEVELS, sl->sec_levels) ||
nla_put_u8(msg, NL802154_SECLEVEL_ATTR_DEV_OVERRIDE,
sl->device_override))
goto nla_put_failure;
if (sl->frame_type == NL802154_FRAME_CMD) {
if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_CMD_FRAME,
sl->cmd_frame_id))
goto nla_put_failure;
}
nla_nest_end(msg, nl_seclevel);
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int
nl802154_dump_llsec_seclevel(struct sk_buff *skb, struct netlink_callback *cb)
{
struct cfg802154_registered_device *rdev = NULL;
struct ieee802154_llsec_seclevel *sl;
struct ieee802154_llsec_table *table;
struct wpan_dev *wpan_dev;
int err;
err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
if (err)
return err;
if (!wpan_dev->netdev) {
err = -EINVAL;
goto out_err;
}
rdev_lock_llsec_table(rdev, wpan_dev);
rdev_get_llsec_table(rdev, wpan_dev, &table);
/* TODO make it like station dump */
if (cb->args[2])
goto out;
list_for_each_entry(sl, &table->security_levels, list) {
if (nl802154_send_seclevel(skb, NL802154_CMD_NEW_SEC_LEVEL,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
rdev, wpan_dev->netdev, sl) < 0) {
/* TODO */
err = -EIO;
rdev_unlock_llsec_table(rdev, wpan_dev);
goto out_err;
}
}
cb->args[2] = 1;
out:
rdev_unlock_llsec_table(rdev, wpan_dev);
err = skb->len;
out_err:
nl802154_finish_wpan_dev_dump(rdev);
return err;
}
static const struct nla_policy nl802154_seclevel_policy[NL802154_SECLEVEL_ATTR_MAX + 1] = {
[NL802154_SECLEVEL_ATTR_LEVELS] = { .type = NLA_U8 },
[NL802154_SECLEVEL_ATTR_FRAME] = { .type = NLA_U32 },
[NL802154_SECLEVEL_ATTR_CMD_FRAME] = { .type = NLA_U32 },
[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE] = { .type = NLA_U8 },
};
static int
llsec_parse_seclevel(struct nlattr *nla, struct ieee802154_llsec_seclevel *sl)
{
struct nlattr *attrs[NL802154_SECLEVEL_ATTR_MAX + 1];
if (!nla || nla_parse_nested(attrs, NL802154_SECLEVEL_ATTR_MAX,
nla, nl802154_seclevel_policy, NULL))
return -EINVAL;
memset(sl, 0, sizeof(*sl));
if (!attrs[NL802154_SECLEVEL_ATTR_LEVELS] ||
!attrs[NL802154_SECLEVEL_ATTR_FRAME] ||
!attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE])
return -EINVAL;
sl->sec_levels = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_LEVELS]);
sl->frame_type = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_FRAME]);
sl->device_override = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE]);
if (sl->frame_type > NL802154_FRAME_MAX ||
(sl->device_override != 0 && sl->device_override != 1))
return -EINVAL;
if (sl->frame_type == NL802154_FRAME_CMD) {
if (!attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME])
return -EINVAL;
sl->cmd_frame_id = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME]);
if (sl->cmd_frame_id > NL802154_CMD_FRAME_MAX)
return -EINVAL;
}
return 0;
}
static int nl802154_add_llsec_seclevel(struct sk_buff *skb,
struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct ieee802154_llsec_seclevel sl;
if (llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
&sl) < 0)
return -EINVAL;
return rdev_add_seclevel(rdev, wpan_dev, &sl);
}
static int nl802154_del_llsec_seclevel(struct sk_buff *skb,
struct genl_info *info)
{
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
struct ieee802154_llsec_seclevel sl;
if (!info->attrs[NL802154_ATTR_SEC_LEVEL] ||
llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
&sl) < 0)
return -EINVAL;
return rdev_del_seclevel(rdev, wpan_dev, &sl);
}
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
#define NL802154_FLAG_NEED_WPAN_PHY 0x01
#define NL802154_FLAG_NEED_NETDEV 0x02
#define NL802154_FLAG_NEED_RTNL 0x04
#define NL802154_FLAG_CHECK_NETDEV_UP 0x08
#define NL802154_FLAG_NEED_NETDEV_UP (NL802154_FLAG_NEED_NETDEV |\
NL802154_FLAG_CHECK_NETDEV_UP)
#define NL802154_FLAG_NEED_WPAN_DEV 0x10
#define NL802154_FLAG_NEED_WPAN_DEV_UP (NL802154_FLAG_NEED_WPAN_DEV |\
NL802154_FLAG_CHECK_NETDEV_UP)
static int nl802154_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
struct genl_info *info)
{
struct cfg802154_registered_device *rdev;
struct wpan_dev *wpan_dev;
struct net_device *dev;
bool rtnl = ops->internal_flags & NL802154_FLAG_NEED_RTNL;
if (rtnl)
rtnl_lock();
if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_PHY) {
rdev = cfg802154_get_dev_from_info(genl_info_net(info), info);
if (IS_ERR(rdev)) {
if (rtnl)
rtnl_unlock();
return PTR_ERR(rdev);
}
info->user_ptr[0] = rdev;
} else if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV ||
ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
ASSERT_RTNL();
wpan_dev = __cfg802154_wpan_dev_from_attrs(genl_info_net(info),
info->attrs);
if (IS_ERR(wpan_dev)) {
if (rtnl)
rtnl_unlock();
return PTR_ERR(wpan_dev);
}
dev = wpan_dev->netdev;
rdev = wpan_phy_to_rdev(wpan_dev->wpan_phy);
if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV) {
if (!dev) {
if (rtnl)
rtnl_unlock();
return -EINVAL;
}
info->user_ptr[1] = dev;
} else {
info->user_ptr[1] = wpan_dev;
}
if (dev) {
if (ops->internal_flags & NL802154_FLAG_CHECK_NETDEV_UP &&
!netif_running(dev)) {
if (rtnl)
rtnl_unlock();
return -ENETDOWN;
}
dev_hold(dev);
}
info->user_ptr[0] = rdev;
}
return 0;
}
static void nl802154_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
struct genl_info *info)
{
if (info->user_ptr[1]) {
if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
struct wpan_dev *wpan_dev = info->user_ptr[1];
if (wpan_dev->netdev)
dev_put(wpan_dev->netdev);
} else {
dev_put(info->user_ptr[1]);
}
}
if (ops->internal_flags & NL802154_FLAG_NEED_RTNL)
rtnl_unlock();
}
static const struct genl_ops nl802154_ops[] = {
{
.cmd = NL802154_CMD_GET_WPAN_PHY,
.doit = nl802154_get_wpan_phy,
.dumpit = nl802154_dump_wpan_phy,
.done = nl802154_dump_wpan_phy_done,
.policy = nl802154_policy,
/* can be retrieved by unprivileged users */
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_GET_INTERFACE,
.doit = nl802154_get_interface,
.dumpit = nl802154_dump_interface,
.policy = nl802154_policy,
/* can be retrieved by unprivileged users */
.internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_NEW_INTERFACE,
.doit = nl802154_new_interface,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_DEL_INTERFACE,
.doit = nl802154_del_interface,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_CHANNEL,
.doit = nl802154_set_channel,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_CCA_MODE,
.doit = nl802154_set_cca_mode,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_CCA_ED_LEVEL,
.doit = nl802154_set_cca_ed_level,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_TX_POWER,
.doit = nl802154_set_tx_power,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_WPAN_PHY_NETNS,
.doit = nl802154_wpan_phy_netns,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_PAN_ID,
.doit = nl802154_set_pan_id,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_SHORT_ADDR,
.doit = nl802154_set_short_addr,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_BACKOFF_EXPONENT,
.doit = nl802154_set_backoff_exponent,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_MAX_CSMA_BACKOFFS,
.doit = nl802154_set_max_csma_backoffs,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_MAX_FRAME_RETRIES,
.doit = nl802154_set_max_frame_retries,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_LBT_MODE,
.doit = nl802154_set_lbt_mode,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_SET_ACKREQ_DEFAULT,
.doit = nl802154_set_ackreq_default,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
{
.cmd = NL802154_CMD_SET_SEC_PARAMS,
.doit = nl802154_set_llsec_params,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_GET_SEC_KEY,
/* TODO .doit by matching key id? */
.dumpit = nl802154_dump_llsec_key,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_NEW_SEC_KEY,
.doit = nl802154_add_llsec_key,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_DEL_SEC_KEY,
.doit = nl802154_del_llsec_key,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
/* TODO unique identifier must short+pan OR extended_addr */
{
.cmd = NL802154_CMD_GET_SEC_DEV,
/* TODO .doit by matching extended_addr? */
.dumpit = nl802154_dump_llsec_dev,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_NEW_SEC_DEV,
.doit = nl802154_add_llsec_dev,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_DEL_SEC_DEV,
.doit = nl802154_del_llsec_dev,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
/* TODO remove complete devkey, put it as nested? */
{
.cmd = NL802154_CMD_GET_SEC_DEVKEY,
/* TODO doit by matching ??? */
.dumpit = nl802154_dump_llsec_devkey,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_NEW_SEC_DEVKEY,
.doit = nl802154_add_llsec_devkey,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_DEL_SEC_DEVKEY,
.doit = nl802154_del_llsec_devkey,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_GET_SEC_LEVEL,
/* TODO .doit by matching frame_type? */
.dumpit = nl802154_dump_llsec_seclevel,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_NEW_SEC_LEVEL,
.doit = nl802154_add_llsec_seclevel,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
{
.cmd = NL802154_CMD_DEL_SEC_LEVEL,
/* TODO match frame_type only? */
.doit = nl802154_del_llsec_seclevel,
.policy = nl802154_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
};
static struct genl_family nl802154_fam __ro_after_init = {
.name = NL802154_GENL_NAME, /* have users key off the name instead */
.hdrsize = 0, /* no private header */
.version = 1, /* no particular meaning now */
.maxattr = NL802154_ATTR_MAX,
.netnsok = true,
.pre_doit = nl802154_pre_doit,
.post_doit = nl802154_post_doit,
.module = THIS_MODULE,
.ops = nl802154_ops,
.n_ops = ARRAY_SIZE(nl802154_ops),
.mcgrps = nl802154_mcgrps,
.n_mcgrps = ARRAY_SIZE(nl802154_mcgrps),
};
/* initialisation/exit functions */
int __init nl802154_init(void)
{
return genl_register_family(&nl802154_fam);
}
void nl802154_exit(void)
{
genl_unregister_family(&nl802154_fam);
}