2 * Raw IEEE 802.15.4 sockets
4 * Copyright 2007, 2008 Siemens AG
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 * Sergey Lapin <slapin@ossfans.org>
21 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
24 #include <linux/net.h>
25 #include <linux/module.h>
26 #include <linux/if_arp.h>
27 #include <linux/list.h>
28 #include <linux/slab.h>
30 #include <net/af_ieee802154.h>
34 static HLIST_HEAD(raw_head);
35 static DEFINE_RWLOCK(raw_lock);
37 static void raw_hash(struct sock *sk)
39 write_lock_bh(&raw_lock);
40 sk_add_node(sk, &raw_head);
41 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
42 write_unlock_bh(&raw_lock);
45 static void raw_unhash(struct sock *sk)
47 write_lock_bh(&raw_lock);
48 if (sk_del_node_init(sk))
49 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
50 write_unlock_bh(&raw_lock);
53 static void raw_close(struct sock *sk, long timeout)
55 sk_common_release(sk);
58 static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int len)
60 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
62 struct net_device *dev = NULL;
64 if (len < sizeof(*addr))
67 if (addr->family != AF_IEEE802154)
72 dev = ieee802154_get_dev(sock_net(sk), &addr->addr);
78 if (dev->type != ARPHRD_IEEE802154) {
83 sk->sk_bound_dev_if = dev->ifindex;
94 static int raw_connect(struct sock *sk, struct sockaddr *uaddr,
100 static int raw_disconnect(struct sock *sk, int flags)
105 static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
108 struct net_device *dev;
114 if (msg->msg_flags & MSG_OOB) {
115 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
120 if (!sk->sk_bound_dev_if)
121 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
123 dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
127 pr_debug("no dev\n");
133 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
136 pr_debug("size = %Zu, mtu = %u\n", size, mtu);
141 hlen = LL_RESERVED_SPACE(dev);
142 tlen = dev->needed_tailroom;
143 skb = sock_alloc_send_skb(sk, hlen + tlen + size,
144 msg->msg_flags & MSG_DONTWAIT, &err);
148 skb_reserve(skb, hlen);
150 skb_reset_mac_header(skb);
151 skb_reset_network_header(skb);
153 err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
159 skb->protocol = htons(ETH_P_IEEE802154);
163 err = dev_queue_xmit(skb);
165 err = net_xmit_errno(err);
177 static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
178 size_t len, int noblock, int flags, int *addr_len)
181 int err = -EOPNOTSUPP;
184 skb = skb_recv_datagram(sk, flags, noblock, &err);
190 msg->msg_flags |= MSG_TRUNC;
194 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
198 sock_recv_ts_and_drops(msg, sk, skb);
200 if (flags & MSG_TRUNC)
203 skb_free_datagram(sk, skb);
210 static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
212 if (sock_queue_rcv_skb(sk, skb) < 0) {
217 return NET_RX_SUCCESS;
221 void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
225 read_lock(&raw_lock);
226 sk_for_each(sk, &raw_head) {
228 if (!sk->sk_bound_dev_if ||
229 sk->sk_bound_dev_if == dev->ifindex) {
231 struct sk_buff *clone;
233 clone = skb_clone(skb, GFP_ATOMIC);
235 raw_rcv_skb(sk, clone);
239 read_unlock(&raw_lock);
242 static int raw_getsockopt(struct sock *sk, int level, int optname,
243 char __user *optval, int __user *optlen)
248 static int raw_setsockopt(struct sock *sk, int level, int optname,
249 char __user *optval, unsigned int optlen)
254 struct proto ieee802154_raw_prot = {
255 .name = "IEEE-802.15.4-RAW",
256 .owner = THIS_MODULE,
257 .obj_size = sizeof(struct sock),
260 .sendmsg = raw_sendmsg,
261 .recvmsg = raw_recvmsg,
263 .unhash = raw_unhash,
264 .connect = raw_connect,
265 .disconnect = raw_disconnect,
266 .getsockopt = raw_getsockopt,
267 .setsockopt = raw_setsockopt,