2 * ZigBee socket interface
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>
30 #include <net/ieee802154/mac_def.h>
31 #include <net/ieee802154/netdevice.h>
33 #include <asm/ioctls.h>
37 static HLIST_HEAD(dgram_head);
38 static DEFINE_RWLOCK(dgram_lock);
44 struct ieee802154_addr src_addr;
45 struct ieee802154_addr dst_addr;
48 static inline struct dgram_sock *dgram_sk(const struct sock *sk)
50 return container_of(sk, struct dgram_sock, sk);
54 static void dgram_hash(struct sock *sk)
56 write_lock_bh(&dgram_lock);
57 sk_add_node(sk, &dgram_head);
58 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
59 write_unlock_bh(&dgram_lock);
62 static void dgram_unhash(struct sock *sk)
64 write_lock_bh(&dgram_lock);
65 if (sk_del_node_init(sk))
66 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
67 write_unlock_bh(&dgram_lock);
70 static int dgram_init(struct sock *sk)
72 struct dgram_sock *ro = dgram_sk(sk);
74 ro->dst_addr.addr_type = IEEE802154_ADDR_LONG;
75 ro->dst_addr.pan_id = 0xffff;
76 memset(&ro->dst_addr.hwaddr, 0xff, sizeof(ro->dst_addr.hwaddr));
80 static void dgram_close(struct sock *sk, long timeout)
82 sk_common_release(sk);
85 static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len)
87 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
88 struct dgram_sock *ro = dgram_sk(sk);
90 struct net_device *dev;
94 if (len < sizeof(*addr))
97 if (addr->family != AF_IEEE802154)
102 dev = ieee802154_get_dev(sock_net(sk), &addr->addr);
108 if (dev->type != ARPHRD_IEEE802154) {
113 memcpy(&ro->src_addr, &addr->addr, sizeof(struct ieee802154_addr));
124 static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg)
129 int amount = atomic_read(&sk->sk_wmem_alloc);
130 return put_user(amount, (int __user *)arg);
136 unsigned long amount;
139 spin_lock_bh(&sk->sk_receive_queue.lock);
140 skb = skb_peek(&sk->sk_receive_queue);
143 * We will only return the amount
144 * of this packet since that is all
147 /* FIXME: parse the header for more correct value */
148 amount = skb->len - (3+8+8);
150 spin_unlock_bh(&sk->sk_receive_queue.lock);
151 return put_user(amount, (int __user *)arg);
158 /* FIXME: autobind */
159 static int dgram_connect(struct sock *sk, struct sockaddr *uaddr,
162 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
163 struct dgram_sock *ro = dgram_sk(sk);
166 if (len < sizeof(*addr))
169 if (addr->family != AF_IEEE802154)
179 memcpy(&ro->dst_addr, &addr->addr, sizeof(struct ieee802154_addr));
186 static int dgram_disconnect(struct sock *sk, int flags)
188 struct dgram_sock *ro = dgram_sk(sk);
192 ro->dst_addr.addr_type = IEEE802154_ADDR_LONG;
193 memset(&ro->dst_addr.hwaddr, 0xff, sizeof(ro->dst_addr.hwaddr));
200 static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk,
201 struct msghdr *msg, size_t size)
203 struct net_device *dev;
206 struct dgram_sock *ro = dgram_sk(sk);
209 if (msg->msg_flags & MSG_OOB) {
210 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
215 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
217 dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr);
220 pr_debug("no dev\n");
225 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
227 skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size,
228 msg->msg_flags & MSG_DONTWAIT,
233 skb_reserve(skb, LL_RESERVED_SPACE(dev));
235 skb_reset_network_header(skb);
237 mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA | MAC_CB_FLAG_ACKREQ;
238 mac_cb(skb)->seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
239 err = dev_hard_header(skb, dev, ETH_P_IEEE802154, &ro->dst_addr,
240 ro->bound ? &ro->src_addr : NULL, size);
244 skb_reset_mac_header(skb);
246 err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
251 pr_debug("size = %Zu, mtu = %u\n", size, mtu);
258 skb->protocol = htons(ETH_P_IEEE802154);
262 err = dev_queue_xmit(skb);
264 err = net_xmit_errno(err);
276 static int dgram_recvmsg(struct kiocb *iocb, struct sock *sk,
277 struct msghdr *msg, size_t len, int noblock, int flags,
281 int err = -EOPNOTSUPP;
284 skb = skb_recv_datagram(sk, flags, noblock, &err);
290 msg->msg_flags |= MSG_TRUNC;
294 /* FIXME: skip headers if necessary ?! */
295 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
299 sock_recv_timestamp(msg, sk, skb);
301 if (flags & MSG_TRUNC)
304 skb_free_datagram(sk, skb);
311 static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb)
313 if (sock_queue_rcv_skb(sk, skb) < 0) {
314 atomic_inc(&sk->sk_drops);
319 return NET_RX_SUCCESS;
322 static inline int ieee802154_match_sock(u8 *hw_addr, u16 pan_id,
323 u16 short_addr, struct dgram_sock *ro)
328 if (ro->src_addr.addr_type == IEEE802154_ADDR_LONG &&
329 !memcmp(ro->src_addr.hwaddr, hw_addr, IEEE802154_ADDR_LEN))
332 if (ro->src_addr.addr_type == IEEE802154_ADDR_SHORT &&
333 pan_id == ro->src_addr.pan_id &&
334 short_addr == ro->src_addr.short_addr)
340 int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb)
342 struct sock *sk, *prev = NULL;
343 struct hlist_node *node;
344 int ret = NET_RX_SUCCESS;
345 u16 pan_id, short_addr;
347 /* Data frame processing */
348 BUG_ON(dev->type != ARPHRD_IEEE802154);
350 pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
351 short_addr = ieee802154_mlme_ops(dev)->get_short_addr(dev);
353 read_lock(&dgram_lock);
354 sk_for_each(sk, node, &dgram_head) {
355 if (ieee802154_match_sock(dev->dev_addr, pan_id, short_addr,
358 struct sk_buff *clone;
359 clone = skb_clone(skb, GFP_ATOMIC);
361 dgram_rcv_skb(prev, clone);
369 dgram_rcv_skb(prev, skb);
374 read_unlock(&dgram_lock);
379 struct proto ieee802154_dgram_prot = {
380 .name = "IEEE-802.15.4-MAC",
381 .owner = THIS_MODULE,
382 .obj_size = sizeof(struct dgram_sock),
384 .close = dgram_close,
386 .sendmsg = dgram_sendmsg,
387 .recvmsg = dgram_recvmsg,
389 .unhash = dgram_unhash,
390 .connect = dgram_connect,
391 .disconnect = dgram_disconnect,
392 .ioctl = dgram_ioctl,