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-rw-r--r--net/ieee802154/nl-phy.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
new file mode 100644
index 000000000..ca1dd9ff0
--- /dev/null
+++ b/net/ieee802154/nl-phy.c
@@ -0,0 +1,355 @@
+/*
+ * Netlink interface 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/kernel.h>
+#include <linux/slab.h>
+#include <linux/if_arp.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <net/cfg802154.h>
+#include <net/af_ieee802154.h>
+#include <net/ieee802154_netdev.h>
+#include <net/rtnetlink.h> /* for rtnl_{un,}lock */
+#include <linux/nl802154.h>
+
+#include "ieee802154.h"
+#include "rdev-ops.h"
+#include "core.h"
+
+static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid,
+ u32 seq, int flags, struct wpan_phy *phy)
+{
+ void *hdr;
+ int i, pages = 0;
+ uint32_t *buf = kcalloc(32, sizeof(uint32_t), GFP_KERNEL);
+
+ pr_debug("%s\n", __func__);
+
+ if (!buf)
+ return -EMSGSIZE;
+
+ hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
+ IEEE802154_LIST_PHY);
+ if (!hdr)
+ goto out;
+
+ rtnl_lock();
+ if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
+ nla_put_u8(msg, IEEE802154_ATTR_PAGE, phy->current_page) ||
+ nla_put_u8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel))
+ goto nla_put_failure;
+ for (i = 0; i < 32; i++) {
+ if (phy->supported.channels[i])
+ buf[pages++] = phy->supported.channels[i] | (i << 27);
+ }
+ if (pages &&
+ nla_put(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST,
+ pages * sizeof(uint32_t), buf))
+ goto nla_put_failure;
+ rtnl_unlock();
+ kfree(buf);
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ rtnl_unlock();
+ genlmsg_cancel(msg, hdr);
+out:
+ kfree(buf);
+ return -EMSGSIZE;
+}
+
+int ieee802154_list_phy(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 wpan_phy *phy;
+ const char *name;
+ int rc = -ENOBUFS;
+
+ pr_debug("%s\n", __func__);
+
+ if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
+ return -EINVAL;
+
+ name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
+ if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
+ return -EINVAL; /* phy name should be null-terminated */
+
+ phy = wpan_phy_find(name);
+ if (!phy)
+ return -ENODEV;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ goto out_dev;
+
+ rc = ieee802154_nl_fill_phy(msg, info->snd_portid, info->snd_seq,
+ 0, phy);
+ if (rc < 0)
+ goto out_free;
+
+ wpan_phy_put(phy);
+
+ return genlmsg_reply(msg, info);
+out_free:
+ nlmsg_free(msg);
+out_dev:
+ wpan_phy_put(phy);
+ return rc;
+}
+
+struct dump_phy_data {
+ struct sk_buff *skb;
+ struct netlink_callback *cb;
+ int idx, s_idx;
+};
+
+static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data)
+{
+ int rc;
+ struct dump_phy_data *data = _data;
+
+ pr_debug("%s\n", __func__);
+
+ if (data->idx++ < data->s_idx)
+ return 0;
+
+ rc = ieee802154_nl_fill_phy(data->skb,
+ NETLINK_CB(data->cb->skb).portid,
+ data->cb->nlh->nlmsg_seq,
+ NLM_F_MULTI,
+ phy);
+
+ if (rc < 0) {
+ data->idx--;
+ return rc;
+ }
+
+ return 0;
+}
+
+int ieee802154_dump_phy(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct dump_phy_data data = {
+ .cb = cb,
+ .skb = skb,
+ .s_idx = cb->args[0],
+ .idx = 0,
+ };
+
+ pr_debug("%s\n", __func__);
+
+ wpan_phy_for_each(ieee802154_dump_phy_iter, &data);
+
+ cb->args[0] = data.idx;
+
+ return skb->len;
+}
+
+int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info)
+{
+ struct sk_buff *msg;
+ struct wpan_phy *phy;
+ const char *name;
+ const char *devname;
+ int rc = -ENOBUFS;
+ struct net_device *dev;
+ int type = __IEEE802154_DEV_INVALID;
+ unsigned char name_assign_type;
+
+ pr_debug("%s\n", __func__);
+
+ if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
+ return -EINVAL;
+
+ name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
+ if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
+ return -EINVAL; /* phy name should be null-terminated */
+
+ if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
+ devname = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
+ if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1]
+ != '\0')
+ return -EINVAL; /* phy name should be null-terminated */
+ name_assign_type = NET_NAME_USER;
+ } else {
+ devname = "wpan%d";
+ name_assign_type = NET_NAME_ENUM;
+ }
+
+ if (strlen(devname) >= IFNAMSIZ)
+ return -ENAMETOOLONG;
+
+ phy = wpan_phy_find(name);
+ if (!phy)
+ return -ENODEV;
+
+ msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE);
+ if (!msg)
+ goto out_dev;
+
+ if (info->attrs[IEEE802154_ATTR_HW_ADDR] &&
+ nla_len(info->attrs[IEEE802154_ATTR_HW_ADDR]) !=
+ IEEE802154_ADDR_LEN) {
+ rc = -EINVAL;
+ goto nla_put_failure;
+ }
+
+ if (info->attrs[IEEE802154_ATTR_DEV_TYPE]) {
+ type = nla_get_u8(info->attrs[IEEE802154_ATTR_DEV_TYPE]);
+ if (type >= __IEEE802154_DEV_MAX) {
+ rc = -EINVAL;
+ goto nla_put_failure;
+ }
+ }
+
+ dev = rdev_add_virtual_intf_deprecated(wpan_phy_to_rdev(phy), devname,
+ name_assign_type, type);
+ if (IS_ERR(dev)) {
+ rc = PTR_ERR(dev);
+ goto nla_put_failure;
+ }
+ dev_hold(dev);
+
+ if (info->attrs[IEEE802154_ATTR_HW_ADDR]) {
+ struct sockaddr addr;
+
+ addr.sa_family = ARPHRD_IEEE802154;
+ nla_memcpy(&addr.sa_data, info->attrs[IEEE802154_ATTR_HW_ADDR],
+ IEEE802154_ADDR_LEN);
+
+ /* strangely enough, some callbacks (inetdev_event) from
+ * dev_set_mac_address require RTNL_LOCK
+ */
+ rtnl_lock();
+ rc = dev_set_mac_address(dev, &addr);
+ rtnl_unlock();
+ if (rc)
+ goto dev_unregister;
+ }
+
+ if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
+ nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name)) {
+ rc = -EMSGSIZE;
+ goto nla_put_failure;
+ }
+ dev_put(dev);
+
+ wpan_phy_put(phy);
+
+ return ieee802154_nl_reply(msg, info);
+
+dev_unregister:
+ rtnl_lock(); /* del_iface must be called with RTNL lock */
+ rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev);
+ dev_put(dev);
+ rtnl_unlock();
+nla_put_failure:
+ nlmsg_free(msg);
+out_dev:
+ wpan_phy_put(phy);
+ return rc;
+}
+
+int ieee802154_del_iface(struct sk_buff *skb, struct genl_info *info)
+{
+ struct sk_buff *msg;
+ struct wpan_phy *phy;
+ const char *name;
+ int rc;
+ struct net_device *dev;
+
+ pr_debug("%s\n", __func__);
+
+ if (!info->attrs[IEEE802154_ATTR_DEV_NAME])
+ return -EINVAL;
+
+ name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
+ if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0')
+ return -EINVAL; /* name should be null-terminated */
+
+ rc = -ENODEV;
+ dev = dev_get_by_name(genl_info_net(info), name);
+ if (!dev)
+ return rc;
+ if (dev->type != ARPHRD_IEEE802154)
+ goto out;
+
+ phy = dev->ieee802154_ptr->wpan_phy;
+ BUG_ON(!phy);
+ get_device(&phy->dev);
+
+ rc = -EINVAL;
+ /* phy name is optional, but should be checked if it's given */
+ if (info->attrs[IEEE802154_ATTR_PHY_NAME]) {
+ struct wpan_phy *phy2;
+
+ const char *pname =
+ nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
+ if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1]
+ != '\0')
+ /* name should be null-terminated */
+ goto out_dev;
+
+ phy2 = wpan_phy_find(pname);
+ if (!phy2)
+ goto out_dev;
+
+ if (phy != phy2) {
+ wpan_phy_put(phy2);
+ goto out_dev;
+ }
+ }
+
+ rc = -ENOBUFS;
+
+ msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE);
+ if (!msg)
+ goto out_dev;
+
+ rtnl_lock();
+ rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev);
+
+ /* We don't have device anymore */
+ dev_put(dev);
+ dev = NULL;
+
+ rtnl_unlock();
+
+ if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
+ nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, name))
+ goto nla_put_failure;
+ wpan_phy_put(phy);
+
+ return ieee802154_nl_reply(msg, info);
+
+nla_put_failure:
+ nlmsg_free(msg);
+out_dev:
+ wpan_phy_put(phy);
+out:
+ if (dev)
+ dev_put(dev);
+
+ return rc;
+}
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