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.
16 * Sergey Lapin <slapin@ossfans.org>
17 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
20 #include <linux/net.h>
21 #include <linux/module.h>
22 #include <linux/if_arp.h>
23 #include <linux/list.h>
24 #include <linux/slab.h>
26 #include <net/af_ieee802154.h>
27 #include <net/ieee802154_netdev.h>
31 static HLIST_HEAD(raw_head
);
32 static DEFINE_RWLOCK(raw_lock
);
34 static void raw_hash(struct sock
*sk
)
36 write_lock_bh(&raw_lock
);
37 sk_add_node(sk
, &raw_head
);
38 sock_prot_inuse_add(sock_net(sk
), sk
->sk_prot
, 1);
39 write_unlock_bh(&raw_lock
);
42 static void raw_unhash(struct sock
*sk
)
44 write_lock_bh(&raw_lock
);
45 if (sk_del_node_init(sk
))
46 sock_prot_inuse_add(sock_net(sk
), sk
->sk_prot
, -1);
47 write_unlock_bh(&raw_lock
);
50 static void raw_close(struct sock
*sk
, long timeout
)
52 sk_common_release(sk
);
55 static int raw_bind(struct sock
*sk
, struct sockaddr
*_uaddr
, int len
)
57 struct ieee802154_addr addr
;
58 struct sockaddr_ieee802154
*uaddr
= (struct sockaddr_ieee802154
*)_uaddr
;
60 struct net_device
*dev
= NULL
;
62 if (len
< sizeof(*uaddr
))
65 uaddr
= (struct sockaddr_ieee802154
*)_uaddr
;
66 if (uaddr
->family
!= AF_IEEE802154
)
71 ieee802154_addr_from_sa(&addr
, &uaddr
->addr
);
72 dev
= ieee802154_get_dev(sock_net(sk
), &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
,
106 struct msghdr
*msg
, size_t size
)
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_from_msg(skb_put(skb
, size
), msg
, 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_msg(skb
, 0, msg
, 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 skb
= skb_share_check(skb
, GFP_ATOMIC
);
216 if (sock_queue_rcv_skb(sk
, skb
) < 0) {
221 return NET_RX_SUCCESS
;
224 void ieee802154_raw_deliver(struct net_device
*dev
, struct sk_buff
*skb
)
228 read_lock(&raw_lock
);
229 sk_for_each(sk
, &raw_head
) {
231 if (!sk
->sk_bound_dev_if
||
232 sk
->sk_bound_dev_if
== dev
->ifindex
) {
233 struct sk_buff
*clone
;
235 clone
= skb_clone(skb
, GFP_ATOMIC
);
237 raw_rcv_skb(sk
, clone
);
241 read_unlock(&raw_lock
);
244 static int raw_getsockopt(struct sock
*sk
, int level
, int optname
,
245 char __user
*optval
, int __user
*optlen
)
250 static int raw_setsockopt(struct sock
*sk
, int level
, int optname
,
251 char __user
*optval
, unsigned int optlen
)
256 struct proto ieee802154_raw_prot
= {
257 .name
= "IEEE-802.15.4-RAW",
258 .owner
= THIS_MODULE
,
259 .obj_size
= sizeof(struct sock
),
262 .sendmsg
= raw_sendmsg
,
263 .recvmsg
= raw_recvmsg
,
265 .unhash
= raw_unhash
,
266 .connect
= raw_connect
,
267 .disconnect
= raw_disconnect
,
268 .getsockopt
= raw_getsockopt
,
269 .setsockopt
= raw_setsockopt
,