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>
31 #include <net/ieee802154_netdev.h>
35 static HLIST_HEAD(raw_head);
36 static DEFINE_RWLOCK(raw_lock);
38 static void raw_hash(struct sock *sk)
40 write_lock_bh(&raw_lock);
41 sk_add_node(sk, &raw_head);
42 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
43 write_unlock_bh(&raw_lock);
46 static void raw_unhash(struct sock *sk)
48 write_lock_bh(&raw_lock);
49 if (sk_del_node_init(sk))
50 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
51 write_unlock_bh(&raw_lock);
54 static void raw_close(struct sock *sk, long timeout)
56 sk_common_release(sk);
59 static int raw_bind(struct sock *sk, struct sockaddr *_uaddr, int len)
61 struct ieee802154_addr addr;
62 struct sockaddr_ieee802154 *uaddr = (struct sockaddr_ieee802154 *)_uaddr;
64 struct net_device *dev = NULL;
66 if (len < sizeof(*uaddr))
69 uaddr = (struct sockaddr_ieee802154 *)_uaddr;
70 if (uaddr->family != AF_IEEE802154)
75 ieee802154_addr_from_sa(&addr, &uaddr->addr);
76 dev = ieee802154_get_dev(sock_net(sk), &addr);
82 if (dev->type != ARPHRD_IEEE802154) {
87 sk->sk_bound_dev_if = dev->ifindex;
98 static int raw_connect(struct sock *sk, struct sockaddr *uaddr,
104 static int raw_disconnect(struct sock *sk, int flags)
109 static int raw_sendmsg(struct kiocb *iocb, struct sock *sk,
110 struct msghdr *msg, size_t size)
112 struct net_device *dev;
118 if (msg->msg_flags & MSG_OOB) {
119 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
124 if (!sk->sk_bound_dev_if)
125 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
127 dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
131 pr_debug("no dev\n");
137 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
140 pr_debug("size = %Zu, mtu = %u\n", size, mtu);
145 hlen = LL_RESERVED_SPACE(dev);
146 tlen = dev->needed_tailroom;
147 skb = sock_alloc_send_skb(sk, hlen + tlen + size,
148 msg->msg_flags & MSG_DONTWAIT, &err);
152 skb_reserve(skb, hlen);
154 skb_reset_mac_header(skb);
155 skb_reset_network_header(skb);
157 err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
163 skb->protocol = htons(ETH_P_IEEE802154);
167 err = dev_queue_xmit(skb);
169 err = net_xmit_errno(err);
181 static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
182 size_t len, int noblock, int flags, int *addr_len)
185 int err = -EOPNOTSUPP;
188 skb = skb_recv_datagram(sk, flags, noblock, &err);
194 msg->msg_flags |= MSG_TRUNC;
198 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
202 sock_recv_ts_and_drops(msg, sk, skb);
204 if (flags & MSG_TRUNC)
207 skb_free_datagram(sk, skb);
214 static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
216 skb = skb_share_check(skb, GFP_ATOMIC);
220 if (sock_queue_rcv_skb(sk, skb) < 0) {
225 return NET_RX_SUCCESS;
229 void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
233 read_lock(&raw_lock);
234 sk_for_each(sk, &raw_head) {
236 if (!sk->sk_bound_dev_if ||
237 sk->sk_bound_dev_if == dev->ifindex) {
238 struct sk_buff *clone;
240 clone = skb_clone(skb, GFP_ATOMIC);
242 raw_rcv_skb(sk, clone);
246 read_unlock(&raw_lock);
249 static int raw_getsockopt(struct sock *sk, int level, int optname,
250 char __user *optval, int __user *optlen)
255 static int raw_setsockopt(struct sock *sk, int level, int optname,
256 char __user *optval, unsigned int optlen)
261 struct proto ieee802154_raw_prot = {
262 .name = "IEEE-802.15.4-RAW",
263 .owner = THIS_MODULE,
264 .obj_size = sizeof(struct sock),
267 .sendmsg = raw_sendmsg,
268 .recvmsg = raw_recvmsg,
270 .unhash = raw_unhash,
271 .connect = raw_connect,
272 .disconnect = raw_disconnect,
273 .getsockopt = raw_getsockopt,
274 .setsockopt = raw_setsockopt,