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>
29 #include <net/ieee802154/af_ieee802154.h>
33 static HLIST_HEAD(raw_head);
34 static DEFINE_RWLOCK(raw_lock);
36 static void raw_hash(struct sock *sk)
38 write_lock_bh(&raw_lock);
39 sk_add_node(sk, &raw_head);
40 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
41 write_unlock_bh(&raw_lock);
44 static void raw_unhash(struct sock *sk)
46 write_lock_bh(&raw_lock);
47 if (sk_del_node_init(sk))
48 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
49 write_unlock_bh(&raw_lock);
52 static void raw_close(struct sock *sk, long timeout)
54 sk_common_release(sk);
57 static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int len)
59 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
61 struct net_device *dev = NULL;
63 if (len < sizeof(*addr))
66 if (addr->family != AF_IEEE802154)
71 dev = ieee802154_get_dev(sock_net(sk), &addr->addr);
77 if (dev->type != ARPHRD_IEEE802154_PHY &&
78 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;
113 if (msg->msg_flags & MSG_OOB) {
114 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
119 if (!sk->sk_bound_dev_if)
120 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
122 dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
126 pr_debug("no dev\n");
132 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
135 pr_debug("size = %Zu, mtu = %u\n", size, mtu);
140 skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size,
141 msg->msg_flags & MSG_DONTWAIT, &err);
145 skb_reserve(skb, LL_RESERVED_SPACE(dev));
147 skb_reset_mac_header(skb);
148 skb_reset_network_header(skb);
150 err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
156 skb->protocol = htons(ETH_P_IEEE802154);
160 err = dev_queue_xmit(skb);
162 err = net_xmit_errno(err);
174 static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
175 size_t len, int noblock, int flags, int *addr_len)
178 int err = -EOPNOTSUPP;
181 skb = skb_recv_datagram(sk, flags, noblock, &err);
187 msg->msg_flags |= MSG_TRUNC;
191 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
195 sock_recv_timestamp(msg, sk, skb);
197 if (flags & MSG_TRUNC)
200 skb_free_datagram(sk, skb);
207 static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
209 if (sock_queue_rcv_skb(sk, skb) < 0) {
210 atomic_inc(&sk->sk_drops);
215 return NET_RX_SUCCESS;
219 void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
222 struct hlist_node *node;
224 read_lock(&raw_lock);
225 sk_for_each(sk, node, &raw_head) {
227 if (!sk->sk_bound_dev_if ||
228 sk->sk_bound_dev_if == dev->ifindex) {
230 struct sk_buff *clone;
232 clone = skb_clone(skb, GFP_ATOMIC);
234 raw_rcv_skb(sk, clone);
238 read_unlock(&raw_lock);
241 struct proto ieee802154_raw_prot = {
242 .name = "IEEE-802.15.4-RAW",
243 .owner = THIS_MODULE,
244 .obj_size = sizeof(struct sock),
247 .sendmsg = raw_sendmsg,
248 .recvmsg = raw_recvmsg,
250 .unhash = raw_unhash,
251 .connect = raw_connect,
252 .disconnect = raw_disconnect,