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nl802154.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Authors:
* Alexander Aring <[email protected]>
*
* 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,
NL802154_MCGRP_SCAN,
};
static const struct genl_multicast_group nl802154_mcgrps[] = {
[NL802154_MCGRP_CONFIG] = { .name = "config", },
[NL802154_MCGRP_SCAN] = { .name = "scan", },
};
/* 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] = NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_PAGE),
[NL802154_ATTR_CHANNEL] = NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_CHANNEL),
[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 },
[NL802154_ATTR_COORDINATOR] = { .type = NLA_NESTED },
[NL802154_ATTR_SCAN_TYPE] =
NLA_POLICY_RANGE(NLA_U8, NL802154_SCAN_ED, NL802154_SCAN_RIT_PASSIVE),
[NL802154_ATTR_SCAN_CHANNELS] =
NLA_POLICY_MASK(NLA_U32, GENMASK(IEEE802154_MAX_CHANNEL, 0)),
[NL802154_ATTR_SCAN_PREAMBLE_CODES] = { .type = NLA_REJECT },
[NL802154_ATTR_SCAN_MEAN_PRF] = { .type = NLA_REJECT },
[NL802154_ATTR_SCAN_DURATION] =
NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_SCAN_DURATION),
[NL802154_ATTR_SCAN_DONE_REASON] =
NLA_POLICY_RANGE(NLA_U8, NL802154_SCAN_DONE_REASON_FINISHED,
NL802154_SCAN_DONE_REASON_ABORTED),
[NL802154_ATTR_BEACON_INTERVAL] =
NLA_POLICY_MAX(NLA_U8, IEEE802154_ACTIVE_SCAN_DURATION),
#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)
{
const struct genl_dumpit_info *info = genl_dumpit_info(cb);
int err;
rtnl_lock();
if (!cb->args[0]) {
*wpan_dev = __cfg802154_wpan_dev_from_attrs(sock_net(skb->sk),
info->info.attrs);
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_noflag(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_noflag(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_noflag(msg, NL802154_ATTR_WPAN_PHY_CAPS);
if (!nl_caps)
return -ENOBUFS;
nl_channels = nla_nest_start_noflag(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_noflag(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_noflag(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_noflag(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)
{
const struct genl_dumpit_info *info = genl_dumpit_info(cb);
struct nlattr **tb = info->info.attrs;
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_noflag(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, ¶ms);
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_noflag(msg, NL802154_ATTR_SEC_OUT_KEY_ID);
if (!nl_key_id)
return -ENOBUFS;
ret = ieee802154_llsec_send_key_id(msg, ¶ms.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 (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
goto out;
if (nl802154_get_llsec_params(msg, rdev, wpan_dev) < 0)
goto nla_put_failure;
out:
#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 (!ieee802154_chan_is_valid(&rdev->wpan_phy, page, 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])