1 files changed, 254 insertions, 0 deletions

diff --git a/net/ieee802154/raw.c b/net/ieee802154/raw.c
new file mode 100644
index 000000000000..8b892e060491
--- /dev/null
+++ b/net/ieee802154/raw.c
@@ -0,0 +1,254 @@
+/*
+ * Raw IEEE 802.15.4 sockets
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Written by:
+ * Sergey Lapin <slapin@ossfans.org>
+ * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+ */
+
+#include <linux/net.h>
+#include <linux/module.h>
+#include <linux/if_arp.h>
+#include <linux/list.h>
+#include <net/sock.h>
+#include <net/ieee802154/af_ieee802154.h>
+
+#include "af802154.h"
+
+static HLIST_HEAD(raw_head);
+static DEFINE_RWLOCK(raw_lock);
+
+static void raw_hash(struct sock *sk)
+{
+        write_lock_bh(&raw_lock);
+        sk_add_node(sk, &raw_head);
+        sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
+        write_unlock_bh(&raw_lock);
+}
+
+static void raw_unhash(struct sock *sk)
+{
+        write_lock_bh(&raw_lock);
+        if (sk_del_node_init(sk))
+                sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
+        write_unlock_bh(&raw_lock);
+}
+
+static void raw_close(struct sock *sk, long timeout)
+{
+        sk_common_release(sk);
+}
+
+static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int len)
+{
+        struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
+        int err = 0;
+        struct net_device *dev = NULL;
+
+        if (len < sizeof(*addr))
+                return -EINVAL;
+
+        if (addr->family != AF_IEEE802154)
+                return -EINVAL;
+
+        lock_sock(sk);
+
+        dev = ieee802154_get_dev(sock_net(sk), &addr->addr);
+        if (!dev) {
+                err = -ENODEV;
+                goto out;
+        }
+
+        if (dev->type != ARPHRD_IEEE802154_PHY &&
+            dev->type != ARPHRD_IEEE802154) {
+                err = -ENODEV;
+                goto out_put;
+        }
+
+        sk->sk_bound_dev_if = dev->ifindex;
+        sk_dst_reset(sk);
+
+out_put:
+        dev_put(dev);
+out:
+        release_sock(sk);
+
+        return err;
+}
+
+static int raw_connect(struct sock *sk, struct sockaddr *uaddr,
+                        int addr_len)
+{
+        return -ENOTSUPP;
+}
+
+static int raw_disconnect(struct sock *sk, int flags)
+{
+        return 0;
+}
+
+static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+                       size_t size)
+{
+        struct net_device *dev;
+        unsigned mtu;
+        struct sk_buff *skb;
+        int err;
+
+        if (msg->msg_flags & MSG_OOB) {
+                pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
+                return -EOPNOTSUPP;
+        }
+
+        lock_sock(sk);
+        if (!sk->sk_bound_dev_if)
+                dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
+        else
+                dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
+        release_sock(sk);
+
+        if (!dev) {
+                pr_debug("no dev\n");
+                err = -ENXIO;
+                goto out;
+        }
+
+        mtu = dev->mtu;
+        pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
+
+        if (size > mtu) {
+                pr_debug("size = %u, mtu = %u\n", size, mtu);
+                err = -EINVAL;
+                goto out_dev;
+        }
+
+        skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size,
+                        msg->msg_flags & MSG_DONTWAIT, &err);
+        if (!skb)
+                goto out_dev;
+
+        skb_reserve(skb, LL_RESERVED_SPACE(dev));
+
+        skb_reset_mac_header(skb);
+        skb_reset_network_header(skb);
+
+        err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
+        if (err < 0)
+                goto out_skb;
+
+        skb->dev = dev;
+        skb->sk  = sk;
+        skb->protocol = htons(ETH_P_IEEE802154);
+
+        dev_put(dev);
+
+        err = dev_queue_xmit(skb);
+        if (err > 0)
+                err = net_xmit_errno(err);
+
+        return err ?: size;
+
+out_skb:
+        kfree_skb(skb);
+out_dev:
+        dev_put(dev);
+out:
+        return err;
+}
+
+static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+                       size_t len, int noblock, int flags, int *addr_len)
+{
+        size_t copied = 0;
+        int err = -EOPNOTSUPP;
+        struct sk_buff *skb;
+
+        skb = skb_recv_datagram(sk, flags, noblock, &err);
+        if (!skb)
+                goto out;
+
+        copied = skb->len;
+        if (len < copied) {
+                msg->msg_flags |= MSG_TRUNC;
+                copied = len;
+        }
+
+        err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+        if (err)
+                goto done;
+
+        sock_recv_timestamp(msg, sk, skb);
+
+        if (flags & MSG_TRUNC)
+                copied = skb->len;
+done:
+        skb_free_datagram(sk, skb);
+out:
+        if (err)
+                return err;
+        return copied;
+}
+
+static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+        if (sock_queue_rcv_skb(sk, skb) < 0) {
+                atomic_inc(&sk->sk_drops);
+                kfree_skb(skb);
+                return NET_RX_DROP;
+        }
+
+        return NET_RX_SUCCESS;
+}
+
+
+void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
+{
+        struct sock *sk;
+        struct hlist_node *node;
+
+        read_lock(&raw_lock);
+        sk_for_each(sk, node, &raw_head) {
+                bh_lock_sock(sk);
+                if (!sk->sk_bound_dev_if ||
+                    sk->sk_bound_dev_if == dev->ifindex) {
+
+                        struct sk_buff *clone;
+
+                        clone = skb_clone(skb, GFP_ATOMIC);
+                        if (clone)
+                                raw_rcv_skb(sk, clone);
+                }
+                bh_unlock_sock(sk);
+        }
+        read_unlock(&raw_lock);
+}
+
+struct proto ieee802154_raw_prot = {
+        .name           = "IEEE-802.15.4-RAW",
+        .owner          = THIS_MODULE,
+        .obj_size       = sizeof(struct sock),
+        .close          = raw_close,
+        .bind           = raw_bind,
+        .sendmsg        = raw_sendmsg,
+        .recvmsg        = raw_recvmsg,
+        .hash           = raw_hash,
+        .unhash         = raw_unhash,
+        .connect        = raw_connect,
+        .disconnect     = raw_disconnect,
+};
+