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linux/net/ieee802154/nl-mac.c
Alexander Aring 87023e1058 ieee802154: fix iface dump with lowpan 
This patch adds a hacked solution for an interface dump with a running
lowpan interface. This will crash because lowpan and wpan interface use
the same arphdr. To change the arphdr will change the UAPI, this patch
checks on mtu which should on lowpan interface always different than
IEEE802154_MTU.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-09 19:50:29 +01:00

1364 lines
35 KiB
C
Raw Blame History

/*
* Netlink inteface for IEEE 802.15.4 stack
*
* Copyright 2007, 2008 Siemens AG
*
* 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.
*
* Written by:
* Sergey Lapin <slapin@ossfans.org>
* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
* Maxim Osipov <maxim.osipov@siemens.com>
*/
#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/if_arp.h>
#include <linux/netdevice.h>
#include <linux/ieee802154.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <net/sock.h>
#include <linux/nl802154.h>
#include <linux/export.h>
#include <net/af_ieee802154.h>
#include <net/ieee802154_netdev.h>
#include <net/cfg802154.h>
#include "ieee802154.h"
static int nla_put_hwaddr(struct sk_buff *msg, int type, __le64 hwaddr)
{
return nla_put_u64(msg, type, swab64((__force u64)hwaddr));
}
static __le64 nla_get_hwaddr(const struct nlattr *nla)
{
return ieee802154_devaddr_from_raw(nla_data(nla));
}
static int nla_put_shortaddr(struct sk_buff *msg, int type, __le16 addr)
{
return nla_put_u16(msg, type, le16_to_cpu(addr));
}
static __le16 nla_get_shortaddr(const struct nlattr *nla)
{
return cpu_to_le16(nla_get_u16(nla));
}
static int ieee802154_nl_start_confirm(struct net_device *dev, u8 status)
{
struct sk_buff *msg;
pr_debug("%s\n", __func__);
msg = ieee802154_nl_create(0, IEEE802154_START_CONF);
if (!msg)
return -ENOBUFS;
if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
dev->dev_addr) ||
nla_put_u8(msg, IEEE802154_ATTR_STATUS, status))
goto nla_put_failure;
return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
nla_put_failure:
nlmsg_free(msg);
return -ENOBUFS;
}
EXPORT_SYMBOL(ieee802154_nl_start_confirm);
static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 portid,
u32 seq, int flags, struct net_device *dev)
{
void *hdr;
struct wpan_phy *phy;
struct ieee802154_mlme_ops *ops;
__le16 short_addr, pan_id;
pr_debug("%s\n", __func__);
hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
IEEE802154_LIST_IFACE);
if (!hdr)
goto out;
ops = ieee802154_mlme_ops(dev);
phy = dev->ieee802154_ptr->wpan_phy;
BUG_ON(!phy);
get_device(&phy->dev);
short_addr = ops->get_short_addr(dev);
pan_id = ops->get_pan_id(dev);
if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
dev->dev_addr) ||
nla_put_shortaddr(msg, IEEE802154_ATTR_SHORT_ADDR, short_addr) ||
nla_put_shortaddr(msg, IEEE802154_ATTR_PAN_ID, pan_id))
goto nla_put_failure;
if (ops->get_mac_params) {
struct ieee802154_mac_params params;
rtnl_lock();
ops->get_mac_params(dev, &params);
rtnl_unlock();
if (nla_put_s8(msg, IEEE802154_ATTR_TXPOWER,
params.transmit_power) ||
nla_put_u8(msg, IEEE802154_ATTR_LBT_ENABLED, params.lbt) ||
nla_put_u8(msg, IEEE802154_ATTR_CCA_MODE,
params.cca_mode) ||
nla_put_s32(msg, IEEE802154_ATTR_CCA_ED_LEVEL,
params.cca_ed_level) ||
nla_put_u8(msg, IEEE802154_ATTR_CSMA_RETRIES,
params.csma_retries) ||
nla_put_u8(msg, IEEE802154_ATTR_CSMA_MIN_BE,
params.min_be) ||
nla_put_u8(msg, IEEE802154_ATTR_CSMA_MAX_BE,
params.max_be) ||
nla_put_s8(msg, IEEE802154_ATTR_FRAME_RETRIES,
params.frame_retries))
goto nla_put_failure;
}
wpan_phy_put(phy);
return genlmsg_end(msg, hdr);
nla_put_failure:
wpan_phy_put(phy);
genlmsg_cancel(msg, hdr);
out:
return -EMSGSIZE;
}
/* Requests from userspace */
static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)
{
struct net_device *dev;
if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
char name[IFNAMSIZ + 1];
nla_strlcpy(name, info->attrs[IEEE802154_ATTR_DEV_NAME],
sizeof(name));
dev = dev_get_by_name(&init_net, name);
} else if (info->attrs[IEEE802154_ATTR_DEV_INDEX]) {
dev = dev_get_by_index(&init_net,
nla_get_u32(info->attrs[IEEE802154_ATTR_DEV_INDEX]));
} else {
return NULL;
}
if (!dev)
return NULL;
/* Check on mtu is currently a hacked solution because lowpan
* and wpan have the same ARPHRD type.
*/
if (dev->type != ARPHRD_IEEE802154 || dev->mtu != IEEE802154_MTU) {
dev_put(dev);
return NULL;
}
return dev;
}
int ieee802154_associate_req(struct sk_buff *skb, struct genl_info *info)
{
struct net_device *dev;
struct ieee802154_addr addr;
u8 page;
int ret = -EOPNOTSUPP;
if (!info->attrs[IEEE802154_ATTR_CHANNEL] ||
!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
(!info->attrs[IEEE802154_ATTR_COORD_HW_ADDR] &&
!info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]) ||
!info->attrs[IEEE802154_ATTR_CAPABILITY])
return -EINVAL;
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
if (!ieee802154_mlme_ops(dev)->assoc_req)
goto out;
if (info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]) {
addr.mode = IEEE802154_ADDR_LONG;
addr.extended_addr = nla_get_hwaddr(
info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]);
} else {
addr.mode = IEEE802154_ADDR_SHORT;
addr.short_addr = nla_get_shortaddr(
info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
}
addr.pan_id = nla_get_shortaddr(
info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
if (info->attrs[IEEE802154_ATTR_PAGE])
page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
else
page = 0;
ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
page,
nla_get_u8(info->attrs[IEEE802154_ATTR_CAPABILITY]));
out:
dev_put(dev);
return ret;
}
int ieee802154_associate_resp(struct sk_buff *skb, struct genl_info *info)
{
struct net_device *dev;
struct ieee802154_addr addr;
int ret = -EOPNOTSUPP;
if (!info->attrs[IEEE802154_ATTR_STATUS] ||
!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] ||
!info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR])
return -EINVAL;
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
if (!ieee802154_mlme_ops(dev)->assoc_resp)
goto out;
addr.mode = IEEE802154_ADDR_LONG;
addr.extended_addr = nla_get_hwaddr(
info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]);
addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
ret = ieee802154_mlme_ops(dev)->assoc_resp(dev, &addr,
nla_get_shortaddr(info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]),
nla_get_u8(info->attrs[IEEE802154_ATTR_STATUS]));
out:
dev_put(dev);
return ret;
}
int ieee802154_disassociate_req(struct sk_buff *skb, struct genl_info *info)
{
struct net_device *dev;
struct ieee802154_addr addr;
int ret = -EOPNOTSUPP;
if ((!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] &&
!info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]) ||
!info->attrs[IEEE802154_ATTR_REASON])
return -EINVAL;
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
if (!ieee802154_mlme_ops(dev)->disassoc_req)
goto out;
if (info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]) {
addr.mode = IEEE802154_ADDR_LONG;
addr.extended_addr = nla_get_hwaddr(
info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]);
} else {
addr.mode = IEEE802154_ADDR_SHORT;
addr.short_addr = nla_get_shortaddr(
info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]);
}
addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
ret = ieee802154_mlme_ops(dev)->disassoc_req(dev, &addr,
nla_get_u8(info->attrs[IEEE802154_ATTR_REASON]));
out:
dev_put(dev);
return ret;
}
/* PANid, channel, beacon_order = 15, superframe_order = 15,
* PAN_coordinator, battery_life_extension = 0,
* coord_realignment = 0, security_enable = 0
*/
int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)
{
struct net_device *dev;
struct ieee802154_addr addr;
u8 channel, bcn_ord, sf_ord;
u8 page;
int pan_coord, blx, coord_realign;
int ret = -EBUSY;
if (!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
!info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR] ||
!info->attrs[IEEE802154_ATTR_CHANNEL] ||
!info->attrs[IEEE802154_ATTR_BCN_ORD] ||
!info->attrs[IEEE802154_ATTR_SF_ORD] ||
!info->attrs[IEEE802154_ATTR_PAN_COORD] ||
!info->attrs[IEEE802154_ATTR_BAT_EXT] ||
!info->attrs[IEEE802154_ATTR_COORD_REALIGN]
)
return -EINVAL;
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
if (netif_running(dev))
goto out;
if (!ieee802154_mlme_ops(dev)->start_req) {
ret = -EOPNOTSUPP;
goto out;
}
addr.mode = IEEE802154_ADDR_SHORT;
addr.short_addr = nla_get_shortaddr(
info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
addr.pan_id = nla_get_shortaddr(
info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
channel = nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]);
bcn_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_BCN_ORD]);
sf_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_SF_ORD]);
pan_coord = nla_get_u8(info->attrs[IEEE802154_ATTR_PAN_COORD]);
blx = nla_get_u8(info->attrs[IEEE802154_ATTR_BAT_EXT]);
coord_realign = nla_get_u8(info->attrs[IEEE802154_ATTR_COORD_REALIGN]);
if (info->attrs[IEEE802154_ATTR_PAGE])
page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
else
page = 0;
if (addr.short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) {
ieee802154_nl_start_confirm(dev, IEEE802154_NO_SHORT_ADDRESS);
dev_put(dev);
return -EINVAL;
}
rtnl_lock();
ret = ieee802154_mlme_ops(dev)->start_req(dev, &addr, channel, page,
bcn_ord, sf_ord, pan_coord, blx, coord_realign);
rtnl_unlock();
/* FIXME: add validation for unused parameters to be sane
* for SoftMAC
*/
ieee802154_nl_start_confirm(dev, IEEE802154_SUCCESS);
out:
dev_put(dev);
return ret;
}
int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)
{
struct net_device *dev;
int ret = -EOPNOTSUPP;
u8 type;
u32 channels;
u8 duration;
u8 page;
if (!info->attrs[IEEE802154_ATTR_SCAN_TYPE] ||
!info->attrs[IEEE802154_ATTR_CHANNELS] ||
!info->attrs[IEEE802154_ATTR_DURATION])
return -EINVAL;
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
if (!ieee802154_mlme_ops(dev)->scan_req)
goto out;
type = nla_get_u8(info->attrs[IEEE802154_ATTR_SCAN_TYPE]);
channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);
duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);
if (info->attrs[IEEE802154_ATTR_PAGE])
page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
else
page = 0;
ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels,
page, duration);
out:
dev_put(dev);
return ret;
}
int ieee802154_list_iface(struct sk_buff *skb, struct genl_info *info)
{
/* Request for interface name, index, type, IEEE address,
* PAN Id, short address
*/
struct sk_buff *msg;
struct net_device *dev = NULL;
int rc = -ENOBUFS;
pr_debug("%s\n", __func__);
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out_dev;
rc = ieee802154_nl_fill_iface(msg, info->snd_portid, info->snd_seq,
0, dev);
if (rc < 0)
goto out_free;
dev_put(dev);
return genlmsg_reply(msg, info);
out_free:
nlmsg_free(msg);
out_dev:
dev_put(dev);
return rc;
}
int ieee802154_dump_iface(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
struct net_device *dev;
int idx;
int s_idx = cb->args[0];
pr_debug("%s\n", __func__);
idx = 0;
for_each_netdev(net, dev) {
/* Check on mtu is currently a hacked solution because lowpan
* and wpan have the same ARPHRD type.
*/
if (idx < s_idx || dev->type != ARPHRD_IEEE802154 ||
dev->mtu != IEEE802154_MTU)
goto cont;
if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI, dev) < 0)
break;
cont:
idx++;
}
cb->args[0] = idx;
return skb->len;
}
int ieee802154_set_macparams(struct sk_buff *skb, struct genl_info *info)
{
struct net_device *dev = NULL;
struct ieee802154_mlme_ops *ops;
struct ieee802154_mac_params params;
struct wpan_phy *phy;
int rc = -EINVAL;
pr_debug("%s\n", __func__);
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
ops = ieee802154_mlme_ops(dev);
if (!ops->get_mac_params || !ops->set_mac_params) {
rc = -EOPNOTSUPP;
goto out;
}
if (netif_running(dev)) {
rc = -EBUSY;
goto out;
}
if (!info->attrs[IEEE802154_ATTR_LBT_ENABLED] &&
!info->attrs[IEEE802154_ATTR_CCA_MODE] &&
!info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL] &&
!info->attrs[IEEE802154_ATTR_CSMA_RETRIES] &&
!info->attrs[IEEE802154_ATTR_CSMA_MIN_BE] &&
!info->attrs[IEEE802154_ATTR_CSMA_MAX_BE] &&
!info->attrs[IEEE802154_ATTR_FRAME_RETRIES])
goto out;
phy = dev->ieee802154_ptr->wpan_phy;
get_device(&phy->dev);
rtnl_lock();
ops->get_mac_params(dev, &params);
if (info->attrs[IEEE802154_ATTR_TXPOWER])
params.transmit_power = nla_get_s8(info->attrs[IEEE802154_ATTR_TXPOWER]);
if (info->attrs[IEEE802154_ATTR_LBT_ENABLED])
params.lbt = nla_get_u8(info->attrs[IEEE802154_ATTR_LBT_ENABLED]);
if (info->attrs[IEEE802154_ATTR_CCA_MODE])
params.cca_mode = nla_get_u8(info->attrs[IEEE802154_ATTR_CCA_MODE]);
if (info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL])
params.cca_ed_level = nla_get_s32(info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL]);
if (info->attrs[IEEE802154_ATTR_CSMA_RETRIES])
params.csma_retries = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_RETRIES]);
if (info->attrs[IEEE802154_ATTR_CSMA_MIN_BE])
params.min_be = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_MIN_BE]);
if (info->attrs[IEEE802154_ATTR_CSMA_MAX_BE])
params.max_be = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_MAX_BE]);
if (info->attrs[IEEE802154_ATTR_FRAME_RETRIES])
params.frame_retries = nla_get_s8(info->attrs[IEEE802154_ATTR_FRAME_RETRIES]);
rc = ops->set_mac_params(dev, &params);
rtnl_unlock();
wpan_phy_put(phy);
dev_put(dev);
return 0;
out:
dev_put(dev);
return rc;
}
static int
ieee802154_llsec_parse_key_id(struct genl_info *info,
struct ieee802154_llsec_key_id *desc)
{
memset(desc, 0, sizeof(*desc));
if (!info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE])
return -EINVAL;
desc->mode = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE]);
if (desc->mode == IEEE802154_SCF_KEY_IMPLICIT) {
if (!info->attrs[IEEE802154_ATTR_PAN_ID] &&
!(info->attrs[IEEE802154_ATTR_SHORT_ADDR] ||
info->attrs[IEEE802154_ATTR_HW_ADDR]))
return -EINVAL;
desc->device_addr.pan_id = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_PAN_ID]);
if (info->attrs[IEEE802154_ATTR_SHORT_ADDR]) {
desc->device_addr.mode = IEEE802154_ADDR_SHORT;
desc->device_addr.short_addr = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_SHORT_ADDR]);
} else {
desc->device_addr.mode = IEEE802154_ADDR_LONG;
desc->device_addr.extended_addr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
}
}
if (desc->mode != IEEE802154_SCF_KEY_IMPLICIT &&
!info->attrs[IEEE802154_ATTR_LLSEC_KEY_ID])
return -EINVAL;
if (desc->mode == IEEE802154_SCF_KEY_SHORT_INDEX &&
!info->attrs[IEEE802154_ATTR_LLSEC_KEY_SOURCE_SHORT])
return -EINVAL;
if (desc->mode == IEEE802154_SCF_KEY_HW_INDEX &&
!info->attrs[IEEE802154_ATTR_LLSEC_KEY_SOURCE_EXTENDED])
return -EINVAL;
if (desc->mode != IEEE802154_SCF_KEY_IMPLICIT)
desc->id = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_ID]);
switch (desc->mode) {
case IEEE802154_SCF_KEY_SHORT_INDEX:
{
u32 source = nla_get_u32(info->attrs[IEEE802154_ATTR_LLSEC_KEY_SOURCE_SHORT]);
desc->short_source = cpu_to_le32(source);
break;
}
case IEEE802154_SCF_KEY_HW_INDEX:
desc->extended_source = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_LLSEC_KEY_SOURCE_EXTENDED]);
break;
}
return 0;
}
static int
ieee802154_llsec_fill_key_id(struct sk_buff *msg,
const struct ieee802154_llsec_key_id *desc)
{
if (nla_put_u8(msg, IEEE802154_ATTR_LLSEC_KEY_MODE, desc->mode))
return -EMSGSIZE;
if (desc->mode == IEEE802154_SCF_KEY_IMPLICIT) {
if (nla_put_shortaddr(msg, IEEE802154_ATTR_PAN_ID,
desc->device_addr.pan_id))
return -EMSGSIZE;
if (desc->device_addr.mode == IEEE802154_ADDR_SHORT &&
nla_put_shortaddr(msg, IEEE802154_ATTR_SHORT_ADDR,
desc->device_addr.short_addr))
return -EMSGSIZE;
if (desc->device_addr.mode == IEEE802154_ADDR_LONG &&
nla_put_hwaddr(msg, IEEE802154_ATTR_HW_ADDR,
desc->device_addr.extended_addr))
return -EMSGSIZE;
}
if (desc->mode != IEEE802154_SCF_KEY_IMPLICIT &&
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_KEY_ID, desc->id))
return -EMSGSIZE;
if (desc->mode == IEEE802154_SCF_KEY_SHORT_INDEX &&
nla_put_u32(msg, IEEE802154_ATTR_LLSEC_KEY_SOURCE_SHORT,
le32_to_cpu(desc->short_source)))
return -EMSGSIZE;
if (desc->mode == IEEE802154_SCF_KEY_HW_INDEX &&
nla_put_hwaddr(msg, IEEE802154_ATTR_LLSEC_KEY_SOURCE_EXTENDED,
desc->extended_source))
return -EMSGSIZE;
return 0;
}
int ieee802154_llsec_getparams(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
struct net_device *dev = NULL;
int rc = -ENOBUFS;
struct ieee802154_mlme_ops *ops;
void *hdr;
struct ieee802154_llsec_params params;
pr_debug("%s\n", __func__);
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
ops = ieee802154_mlme_ops(dev);
if (!ops->llsec) {
rc = -EOPNOTSUPP;
goto out_dev;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out_dev;
hdr = genlmsg_put(msg, 0, info->snd_seq, &nl802154_family, 0,
IEEE802154_LLSEC_GETPARAMS);
if (!hdr)
goto out_free;
rc = ops->llsec->get_params(dev, &params);
if (rc < 0)
goto out_free;
if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_ENABLED, params.enabled) ||
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_SECLEVEL, params.out_level) ||
nla_put_u32(msg, IEEE802154_ATTR_LLSEC_FRAME_COUNTER,
be32_to_cpu(params.frame_counter)) ||
ieee802154_llsec_fill_key_id(msg, &params.out_key))
goto out_free;
dev_put(dev);
return ieee802154_nl_reply(msg, info);
out_free:
nlmsg_free(msg);
out_dev:
dev_put(dev);
return rc;
}
int ieee802154_llsec_setparams(struct sk_buff *skb, struct genl_info *info)
{
struct net_device *dev = NULL;
int rc = -EINVAL;
struct ieee802154_mlme_ops *ops;
struct ieee802154_llsec_params params;
int changed = 0;
pr_debug("%s\n", __func__);
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
if (!info->attrs[IEEE802154_ATTR_LLSEC_ENABLED] &&
!info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE] &&
!info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL])
goto out;
ops = ieee802154_mlme_ops(dev);
if (!ops->llsec) {
rc = -EOPNOTSUPP;
goto out;
}
if (info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL] &&
nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL]) > 7)
goto out;
if (info->attrs[IEEE802154_ATTR_LLSEC_ENABLED]) {
params.enabled = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_ENABLED]);
changed |= IEEE802154_LLSEC_PARAM_ENABLED;
}
if (info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE]) {
if (ieee802154_llsec_parse_key_id(info, &params.out_key))
goto out;
changed |= IEEE802154_LLSEC_PARAM_OUT_KEY;
}
if (info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL]) {
params.out_level = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL]);
changed |= IEEE802154_LLSEC_PARAM_OUT_LEVEL;
}
if (info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER]) {
u32 fc = nla_get_u32(info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER]);
params.frame_counter = cpu_to_be32(fc);
changed |= IEEE802154_LLSEC_PARAM_FRAME_COUNTER;
}
rc = ops->llsec->set_params(dev, &params, changed);
dev_put(dev);
return rc;
out:
dev_put(dev);
return rc;
}
struct llsec_dump_data {
struct sk_buff *skb;
int s_idx, s_idx2;
int portid;
int nlmsg_seq;
struct net_device *dev;
struct ieee802154_mlme_ops *ops;
struct ieee802154_llsec_table *table;
};
static int
ieee802154_llsec_dump_table(struct sk_buff *skb, struct netlink_callback *cb,
int (*step)(struct llsec_dump_data *))
{
struct net *net = sock_net(skb->sk);
struct net_device *dev;
struct llsec_dump_data data;
int idx = 0;
int first_dev = cb->args[0];
int rc;
for_each_netdev(net, dev) {
/* Check on mtu is currently a hacked solution because lowpan
* and wpan have the same ARPHRD type.
*/
if (idx < first_dev || dev->type != ARPHRD_IEEE802154 ||
dev->mtu != IEEE802154_MTU)
goto skip;
data.ops = ieee802154_mlme_ops(dev);
if (!data.ops->llsec)
goto skip;
data.skb = skb;
data.s_idx = cb->args[1];
data.s_idx2 = cb->args[2];
data.dev = dev;
data.portid = NETLINK_CB(cb->skb).portid;
data.nlmsg_seq = cb->nlh->nlmsg_seq;
data.ops->llsec->lock_table(dev);
data.ops->llsec->get_table(data.dev, &data.table);
rc = step(&data);
data.ops->llsec->unlock_table(dev);
if (rc < 0)
break;
skip:
idx++;
}
cb->args[0] = idx;
return skb->len;
}
static int
ieee802154_nl_llsec_change(struct sk_buff *skb, struct genl_info *info,
int (*fn)(struct net_device*, struct genl_info*))
{
struct net_device *dev = NULL;
int rc = -EINVAL;
dev = ieee802154_nl_get_dev(info);
if (!dev)
return -ENODEV;
if (!ieee802154_mlme_ops(dev)->llsec)
rc = -EOPNOTSUPP;
else
rc = fn(dev, info);
dev_put(dev);
return rc;
}
static int
ieee802154_llsec_parse_key(struct genl_info *info,
struct ieee802154_llsec_key *key)
{
u8 frames;
u32 commands[256 / 32];
memset(key, 0, sizeof(*key));
if (!info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_FRAME_TYPES] ||
!info->attrs[IEEE802154_ATTR_LLSEC_KEY_BYTES])
return -EINVAL;
frames = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_FRAME_TYPES]);
if ((frames & BIT(IEEE802154_FC_TYPE_MAC_CMD)) &&
!info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_COMMANDS])
return -EINVAL;
if (info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_COMMANDS]) {
nla_memcpy(commands,
info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_COMMANDS],
256 / 8);
if (commands[0] || commands[1] || commands[2] || commands[3] ||
commands[4] || commands[5] || commands[6] ||
commands[7] >= BIT(IEEE802154_CMD_GTS_REQ + 1))
return -EINVAL;
key->cmd_frame_ids = commands[7];
}
key->frame_types = frames;
nla_memcpy(key->key, info->attrs[IEEE802154_ATTR_LLSEC_KEY_BYTES],
IEEE802154_LLSEC_KEY_SIZE);
return 0;
}
static int llsec_add_key(struct net_device *dev, struct genl_info *info)
{
struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
struct ieee802154_llsec_key key;
struct ieee802154_llsec_key_id id;
if (ieee802154_llsec_parse_key(info, &key) ||
ieee802154_llsec_parse_key_id(info, &id))
return -EINVAL;
return ops->llsec->add_key(dev, &id, &key);
}
int ieee802154_llsec_add_key(struct sk_buff *skb, struct genl_info *info)
{
if ((info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) !=
(NLM_F_CREATE | NLM_F_EXCL))
return -EINVAL;
return ieee802154_nl_llsec_change(skb, info, llsec_add_key);
}
static int llsec_remove_key(struct net_device *dev, struct genl_info *info)
{
struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
struct ieee802154_llsec_key_id id;
if (ieee802154_llsec_parse_key_id(info, &id))
return -EINVAL;
return ops->llsec->del_key(dev, &id);
}
int ieee802154_llsec_del_key(struct sk_buff *skb, struct genl_info *info)
{
return ieee802154_nl_llsec_change(skb, info, llsec_remove_key);
}
static int
ieee802154_nl_fill_key(struct sk_buff *msg, u32 portid, u32 seq,
const struct ieee802154_llsec_key_entry *key,
const struct net_device *dev)
{
void *hdr;
u32 commands[256 / 32];
hdr = genlmsg_put(msg, 0, seq, &nl802154_family, NLM_F_MULTI,
IEEE802154_LLSEC_LIST_KEY);
if (!hdr)
goto out;
if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
ieee802154_llsec_fill_key_id(msg, &key->id) ||
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_KEY_USAGE_FRAME_TYPES,
key->key->frame_types))
goto nla_put_failure;
if (key->key->frame_types & BIT(IEEE802154_FC_TYPE_MAC_CMD)) {
memset(commands, 0, sizeof(commands));
commands[7] = key->key->cmd_frame_ids;
if (nla_put(msg, IEEE802154_ATTR_LLSEC_KEY_USAGE_COMMANDS,
sizeof(commands), commands))
goto nla_put_failure;
}
if (nla_put(msg, IEEE802154_ATTR_LLSEC_KEY_BYTES,
IEEE802154_LLSEC_KEY_SIZE, key->key->key))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
out:
return -EMSGSIZE;
}
static int llsec_iter_keys(struct llsec_dump_data *data)
{
struct ieee802154_llsec_key_entry *pos;
int rc = 0, idx = 0;
list_for_each_entry(pos, &data->table->keys, list) {
if (idx++ < data->s_idx)
continue;
if (ieee802154_nl_fill_key(data->skb, data->portid,
data->nlmsg_seq, pos, data->dev)) {
rc = -EMSGSIZE;
break;
}
data->s_idx++;
}
return rc;
}
int ieee802154_llsec_dump_keys(struct sk_buff *skb, struct netlink_callback *cb)
{
return ieee802154_llsec_dump_table(skb, cb, llsec_iter_keys);
}
static int
llsec_parse_dev(struct genl_info *info,
struct ieee802154_llsec_device *dev)
{
memset(dev, 0, sizeof(*dev));
if (!info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER] ||
!info->attrs[IEEE802154_ATTR_HW_ADDR] ||
!info->attrs[IEEE802154_ATTR_LLSEC_DEV_OVERRIDE] ||
!info->attrs[IEEE802154_ATTR_LLSEC_DEV_KEY_MODE] ||
(!!info->attrs[IEEE802154_ATTR_PAN_ID] !=
!!info->attrs[IEEE802154_ATTR_SHORT_ADDR]))
return -EINVAL;
if (info->attrs[IEEE802154_ATTR_PAN_ID]) {
dev->pan_id = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_PAN_ID]);
dev->short_addr = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_SHORT_ADDR]);
} else {
dev->short_addr = cpu_to_le16(IEEE802154_ADDR_UNDEF);
}
dev->hwaddr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
dev->frame_counter = nla_get_u32(info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER]);
dev->seclevel_exempt = !!nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_DEV_OVERRIDE]);
dev->key_mode = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_DEV_KEY_MODE]);
if (dev->key_mode >= __IEEE802154_LLSEC_DEVKEY_MAX)
return -EINVAL;
return 0;
}
static int llsec_add_dev(struct net_device *dev, struct genl_info *info)
{
struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
struct ieee802154_llsec_device desc;
if (llsec_parse_dev(info, &desc))
return -EINVAL;
return ops->llsec->add_dev(dev, &desc);
}
int ieee802154_llsec_add_dev(struct sk_buff *skb, struct genl_info *info)
{
if ((info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) !=
(NLM_F_CREATE | NLM_F_EXCL))
return -EINVAL;
return ieee802154_nl_llsec_change(skb, info, llsec_add_dev);
}
static int llsec_del_dev(struct net_device *dev, struct genl_info *info)
{
struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
__le64 devaddr;
if (!info->attrs[IEEE802154_ATTR_HW_ADDR])
return -EINVAL;
devaddr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
return ops->llsec->del_dev(dev, devaddr);
}
int ieee802154_llsec_del_dev(struct sk_buff *skb, struct genl_info *info)
{
return ieee802154_nl_llsec_change(skb, info, llsec_del_dev);
}
static int
ieee802154_nl_fill_dev(struct sk_buff *msg, u32 portid, u32 seq,
const struct ieee802154_llsec_device *desc,
const struct net_device *dev)
{
void *hdr;
hdr = genlmsg_put(msg, 0, seq, &nl802154_family, NLM_F_MULTI,
IEEE802154_LLSEC_LIST_DEV);
if (!hdr)
goto out;
if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
nla_put_shortaddr(msg, IEEE802154_ATTR_PAN_ID, desc->pan_id) ||
nla_put_shortaddr(msg, IEEE802154_ATTR_SHORT_ADDR,
desc->short_addr) ||
nla_put_hwaddr(msg, IEEE802154_ATTR_HW_ADDR, desc->hwaddr) ||
nla_put_u32(msg, IEEE802154_ATTR_LLSEC_FRAME_COUNTER,
desc->frame_counter) ||
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_DEV_OVERRIDE,
desc->seclevel_exempt) ||
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_DEV_KEY_MODE, desc->key_mode))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
out:
return -EMSGSIZE;
}
static int llsec_iter_devs(struct llsec_dump_data *data)
{
struct ieee802154_llsec_device *pos;
int rc = 0, idx = 0;
list_for_each_entry(pos, &data->table->devices, list) {
if (idx++ < data->s_idx)
continue;
if (ieee802154_nl_fill_dev(data->skb, data->portid,
data->nlmsg_seq, pos, data->dev)) {
rc = -EMSGSIZE;
break;
}
data->s_idx++;
}
return rc;
}
int ieee802154_llsec_dump_devs(struct sk_buff *skb, struct netlink_callback *cb)
{
return ieee802154_llsec_dump_table(skb, cb, llsec_iter_devs);
}
static int llsec_add_devkey(struct net_device *dev, struct genl_info *info)
{
struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
struct ieee802154_llsec_device_key key;
__le64 devaddr;
if (!info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER] ||
!info->attrs[IEEE802154_ATTR_HW_ADDR] ||
ieee802154_llsec_parse_key_id(info, &key.key_id))
return -EINVAL;
devaddr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
key.frame_counter = nla_get_u32(info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER]);
return ops->llsec->add_devkey(dev, devaddr, &key);
}
int ieee802154_llsec_add_devkey(struct sk_buff *skb, struct genl_info *info)
{
if ((info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) !=
(NLM_F_CREATE | NLM_F_EXCL))
return -EINVAL;
return ieee802154_nl_llsec_change(skb, info, llsec_add_devkey);
}
static int llsec_del_devkey(struct net_device *dev, struct genl_info *info)
{
struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
struct ieee802154_llsec_device_key key;
__le64 devaddr;
if (!info->attrs[IEEE802154_ATTR_HW_ADDR] ||
ieee802154_llsec_parse_key_id(info, &key.key_id))
return -EINVAL;
devaddr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
return ops->llsec->del_devkey(dev, devaddr, &key);
}
int ieee802154_llsec_del_devkey(struct sk_buff *skb, struct genl_info *info)
{
return ieee802154_nl_llsec_change(skb, info, llsec_del_devkey);
}
static int
ieee802154_nl_fill_devkey(struct sk_buff *msg, u32 portid, u32 seq,
__le64 devaddr,
const struct ieee802154_llsec_device_key *devkey,
const struct net_device *dev)
{
void *hdr;
hdr = genlmsg_put(msg, 0, seq, &nl802154_family, NLM_F_MULTI,
IEEE802154_LLSEC_LIST_DEVKEY);
if (!hdr)
goto out;
if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
nla_put_hwaddr(msg, IEEE802154_ATTR_HW_ADDR, devaddr) ||
nla_put_u32(msg, IEEE802154_ATTR_LLSEC_FRAME_COUNTER,
devkey->frame_counter) ||
ieee802154_llsec_fill_key_id(msg, &devkey->key_id))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
out:
return -EMSGSIZE;
}
static int llsec_iter_devkeys(struct llsec_dump_data *data)
{
struct ieee802154_llsec_device *dpos;
struct ieee802154_llsec_device_key *kpos;
int rc = 0, idx = 0, idx2;
list_for_each_entry(dpos, &data->table->devices, list) {
if (idx++ < data->s_idx)
continue;
idx2 = 0;
list_for_each_entry(kpos, &dpos->keys, list) {
if (idx2++ < data->s_idx2)
continue;
if (ieee802154_nl_fill_devkey(data->skb, data->portid,
data->nlmsg_seq,
dpos->hwaddr, kpos,
data->dev)) {
return rc = -EMSGSIZE;
}
data->s_idx2++;
}
data->s_idx++;
}
return rc;
}
int ieee802154_llsec_dump_devkeys(struct sk_buff *skb,
struct netlink_callback *cb)
{
return ieee802154_llsec_dump_table(skb, cb, llsec_iter_devkeys);
}
static int
llsec_parse_seclevel(struct genl_info *info,
struct ieee802154_llsec_seclevel *sl)
{
memset(sl, 0, sizeof(*sl));
if (!info->attrs[IEEE802154_ATTR_LLSEC_FRAME_TYPE] ||
!info->attrs[IEEE802154_ATTR_LLSEC_SECLEVELS] ||
!info->attrs[IEEE802154_ATTR_LLSEC_DEV_OVERRIDE])
return -EINVAL;
sl->frame_type = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_FRAME_TYPE]);
if (sl->frame_type == IEEE802154_FC_TYPE_MAC_CMD) {
if (!info->attrs[IEEE802154_ATTR_LLSEC_CMD_FRAME_ID])
return -EINVAL;
sl->cmd_frame_id = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_CMD_FRAME_ID]);
}
sl->sec_levels = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_SECLEVELS]);
sl->device_override = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_DEV_OVERRIDE]);
return 0;
}
static int llsec_add_seclevel(struct net_device *dev, struct genl_info *info)
{
struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
struct ieee802154_llsec_seclevel sl;
if (llsec_parse_seclevel(info, &sl))
return -EINVAL;
return ops->llsec->add_seclevel(dev, &sl);
}
int ieee802154_llsec_add_seclevel(struct sk_buff *skb, struct genl_info *info)
{
if ((info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) !=
(NLM_F_CREATE | NLM_F_EXCL))
return -EINVAL;
return ieee802154_nl_llsec_change(skb, info, llsec_add_seclevel);
}
static int llsec_del_seclevel(struct net_device *dev, struct genl_info *info)
{
struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
struct ieee802154_llsec_seclevel sl;
if (llsec_parse_seclevel(info, &sl))
return -EINVAL;
return ops->llsec->del_seclevel(dev, &sl);
}
int ieee802154_llsec_del_seclevel(struct sk_buff *skb, struct genl_info *info)
{
return ieee802154_nl_llsec_change(skb, info, llsec_del_seclevel);
}
static int
ieee802154_nl_fill_seclevel(struct sk_buff *msg, u32 portid, u32 seq,
const struct ieee802154_llsec_seclevel *sl,
const struct net_device *dev)
{
void *hdr;
hdr = genlmsg_put(msg, 0, seq, &nl802154_family, NLM_F_MULTI,
IEEE802154_LLSEC_LIST_SECLEVEL);
if (!hdr)
goto out;
if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_FRAME_TYPE, sl->frame_type) ||
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_SECLEVELS, sl->sec_levels) ||
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_DEV_OVERRIDE,
sl->device_override))
goto nla_put_failure;
if (sl->frame_type == IEEE802154_FC_TYPE_MAC_CMD &&
nla_put_u8(msg, IEEE802154_ATTR_LLSEC_CMD_FRAME_ID,
sl->cmd_frame_id))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
out:
return -EMSGSIZE;
}
static int llsec_iter_seclevels(struct llsec_dump_data *data)
{
struct ieee802154_llsec_seclevel *pos;
int rc = 0, idx = 0;
list_for_each_entry(pos, &data->table->security_levels, list) {
if (idx++ < data->s_idx)
continue;
if (ieee802154_nl_fill_seclevel(data->skb, data->portid,
data->nlmsg_seq, pos,
data->dev)) {
rc = -EMSGSIZE;
break;
}
data->s_idx++;
}
return rc;
}
int ieee802154_llsec_dump_seclevels(struct sk_buff *skb,
struct netlink_callback *cb)
{
return ieee802154_llsec_dump_table(skb, cb, llsec_iter_seclevels);
}
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