350 lines
7.9 KiB
C
350 lines
7.9 KiB
C
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/*
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* Netlink interface for IEEE 802.15.4 stack
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*
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* Copyright 2007, 2008 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by:
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* Sergey Lapin <slapin@ossfans.org>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Maxim Osipov <maxim.osipov@siemens.com>
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/if_arp.h>
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#include <net/netlink.h>
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#include <net/genetlink.h>
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#include <net/cfg802154.h>
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#include <net/af_ieee802154.h>
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#include <net/ieee802154_netdev.h>
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#include <net/rtnetlink.h> /* for rtnl_{un,}lock */
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#include <linux/nl802154.h>
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#include "ieee802154.h"
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#include "rdev-ops.h"
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#include "core.h"
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static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid,
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u32 seq, int flags, struct wpan_phy *phy)
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{
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void *hdr;
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int i, pages = 0;
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uint32_t *buf = kzalloc(32 * sizeof(uint32_t), GFP_KERNEL);
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pr_debug("%s\n", __func__);
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if (!buf)
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return -EMSGSIZE;
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hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
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IEEE802154_LIST_PHY);
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if (!hdr)
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goto out;
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rtnl_lock();
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if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
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nla_put_u8(msg, IEEE802154_ATTR_PAGE, phy->current_page) ||
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nla_put_u8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel))
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goto nla_put_failure;
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for (i = 0; i < 32; i++) {
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if (phy->supported.channels[i])
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buf[pages++] = phy->supported.channels[i] | (i << 27);
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}
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if (pages &&
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nla_put(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST,
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pages * sizeof(uint32_t), buf))
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goto nla_put_failure;
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rtnl_unlock();
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kfree(buf);
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genlmsg_end(msg, hdr);
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return 0;
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nla_put_failure:
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rtnl_unlock();
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genlmsg_cancel(msg, hdr);
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out:
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kfree(buf);
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return -EMSGSIZE;
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}
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int ieee802154_list_phy(struct sk_buff *skb, struct genl_info *info)
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{
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/* Request for interface name, index, type, IEEE address,
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* PAN Id, short address
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*/
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struct sk_buff *msg;
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struct wpan_phy *phy;
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const char *name;
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int rc = -ENOBUFS;
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pr_debug("%s\n", __func__);
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if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
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return -EINVAL;
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name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
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if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
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return -EINVAL; /* phy name should be null-terminated */
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phy = wpan_phy_find(name);
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if (!phy)
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return -ENODEV;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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goto out_dev;
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rc = ieee802154_nl_fill_phy(msg, info->snd_portid, info->snd_seq,
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0, phy);
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if (rc < 0)
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goto out_free;
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wpan_phy_put(phy);
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return genlmsg_reply(msg, info);
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out_free:
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nlmsg_free(msg);
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out_dev:
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wpan_phy_put(phy);
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return rc;
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}
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struct dump_phy_data {
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struct sk_buff *skb;
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struct netlink_callback *cb;
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int idx, s_idx;
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};
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static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data)
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{
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int rc;
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struct dump_phy_data *data = _data;
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pr_debug("%s\n", __func__);
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if (data->idx++ < data->s_idx)
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return 0;
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rc = ieee802154_nl_fill_phy(data->skb,
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NETLINK_CB(data->cb->skb).portid,
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data->cb->nlh->nlmsg_seq,
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NLM_F_MULTI,
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phy);
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if (rc < 0) {
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data->idx--;
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return rc;
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}
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return 0;
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}
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int ieee802154_dump_phy(struct sk_buff *skb, struct netlink_callback *cb)
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{
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struct dump_phy_data data = {
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.cb = cb,
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.skb = skb,
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.s_idx = cb->args[0],
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.idx = 0,
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};
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pr_debug("%s\n", __func__);
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wpan_phy_for_each(ieee802154_dump_phy_iter, &data);
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cb->args[0] = data.idx;
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return skb->len;
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}
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int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info)
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{
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struct sk_buff *msg;
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struct wpan_phy *phy;
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const char *name;
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const char *devname;
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int rc = -ENOBUFS;
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struct net_device *dev;
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int type = __IEEE802154_DEV_INVALID;
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unsigned char name_assign_type;
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pr_debug("%s\n", __func__);
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if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
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return -EINVAL;
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name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
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if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
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return -EINVAL; /* phy name should be null-terminated */
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if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
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devname = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
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if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1]
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!= '\0')
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return -EINVAL; /* phy name should be null-terminated */
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name_assign_type = NET_NAME_USER;
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} else {
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devname = "wpan%d";
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name_assign_type = NET_NAME_ENUM;
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}
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if (strlen(devname) >= IFNAMSIZ)
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return -ENAMETOOLONG;
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phy = wpan_phy_find(name);
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if (!phy)
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return -ENODEV;
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msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE);
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if (!msg)
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goto out_dev;
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if (info->attrs[IEEE802154_ATTR_HW_ADDR] &&
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nla_len(info->attrs[IEEE802154_ATTR_HW_ADDR]) !=
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IEEE802154_ADDR_LEN) {
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rc = -EINVAL;
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goto nla_put_failure;
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}
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if (info->attrs[IEEE802154_ATTR_DEV_TYPE]) {
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type = nla_get_u8(info->attrs[IEEE802154_ATTR_DEV_TYPE]);
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if (type >= __IEEE802154_DEV_MAX) {
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rc = -EINVAL;
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goto nla_put_failure;
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}
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}
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dev = rdev_add_virtual_intf_deprecated(wpan_phy_to_rdev(phy), devname,
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name_assign_type, type);
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if (IS_ERR(dev)) {
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rc = PTR_ERR(dev);
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goto nla_put_failure;
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}
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dev_hold(dev);
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if (info->attrs[IEEE802154_ATTR_HW_ADDR]) {
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struct sockaddr addr;
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addr.sa_family = ARPHRD_IEEE802154;
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nla_memcpy(&addr.sa_data, info->attrs[IEEE802154_ATTR_HW_ADDR],
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IEEE802154_ADDR_LEN);
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/* strangely enough, some callbacks (inetdev_event) from
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* dev_set_mac_address require RTNL_LOCK
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*/
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rtnl_lock();
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rc = dev_set_mac_address(dev, &addr);
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rtnl_unlock();
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if (rc)
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goto dev_unregister;
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}
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if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
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nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name))
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goto nla_put_failure;
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dev_put(dev);
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wpan_phy_put(phy);
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return ieee802154_nl_reply(msg, info);
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dev_unregister:
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rtnl_lock(); /* del_iface must be called with RTNL lock */
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rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev);
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dev_put(dev);
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rtnl_unlock();
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nla_put_failure:
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nlmsg_free(msg);
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out_dev:
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wpan_phy_put(phy);
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return rc;
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}
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int ieee802154_del_iface(struct sk_buff *skb, struct genl_info *info)
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{
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struct sk_buff *msg;
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struct wpan_phy *phy;
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const char *name;
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int rc;
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struct net_device *dev;
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pr_debug("%s\n", __func__);
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if (!info->attrs[IEEE802154_ATTR_DEV_NAME])
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return -EINVAL;
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name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
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if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0')
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return -EINVAL; /* name should be null-terminated */
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dev = dev_get_by_name(genl_info_net(info), name);
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if (!dev)
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return -ENODEV;
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phy = dev->ieee802154_ptr->wpan_phy;
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BUG_ON(!phy);
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get_device(&phy->dev);
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rc = -EINVAL;
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/* phy name is optional, but should be checked if it's given */
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if (info->attrs[IEEE802154_ATTR_PHY_NAME]) {
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struct wpan_phy *phy2;
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const char *pname =
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nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
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if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1]
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!= '\0')
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/* name should be null-terminated */
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goto out_dev;
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phy2 = wpan_phy_find(pname);
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if (!phy2)
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goto out_dev;
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if (phy != phy2) {
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wpan_phy_put(phy2);
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goto out_dev;
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}
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}
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rc = -ENOBUFS;
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msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE);
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if (!msg)
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goto out_dev;
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rtnl_lock();
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rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev);
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/* We don't have device anymore */
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dev_put(dev);
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dev = NULL;
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rtnl_unlock();
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if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
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nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, name))
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goto nla_put_failure;
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wpan_phy_put(phy);
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return ieee802154_nl_reply(msg, info);
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nla_put_failure:
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nlmsg_free(msg);
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out_dev:
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wpan_phy_put(phy);
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if (dev)
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dev_put(dev);
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return rc;
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}
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