Root/
1 | /* |
2 | * Raw IEEE 802.15.4 sockets |
3 | * |
4 | * Copyright 2007, 2008 Siemens AG |
5 | * |
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. |
9 | * |
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. |
14 | * |
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. |
18 | * |
19 | * Written by: |
20 | * Sergey Lapin <slapin@ossfans.org> |
21 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> |
22 | */ |
23 | |
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> |
29 | #include <net/sock.h> |
30 | #include <net/af_ieee802154.h> |
31 | |
32 | #include "af802154.h" |
33 | |
34 | static HLIST_HEAD(raw_head); |
35 | static DEFINE_RWLOCK(raw_lock); |
36 | |
37 | static void raw_hash(struct sock *sk) |
38 | { |
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); |
43 | } |
44 | |
45 | static void raw_unhash(struct sock *sk) |
46 | { |
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); |
51 | } |
52 | |
53 | static void raw_close(struct sock *sk, long timeout) |
54 | { |
55 | sk_common_release(sk); |
56 | } |
57 | |
58 | static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int len) |
59 | { |
60 | struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr; |
61 | int err = 0; |
62 | struct net_device *dev = NULL; |
63 | |
64 | if (len < sizeof(*addr)) |
65 | return -EINVAL; |
66 | |
67 | if (addr->family != AF_IEEE802154) |
68 | return -EINVAL; |
69 | |
70 | lock_sock(sk); |
71 | |
72 | dev = ieee802154_get_dev(sock_net(sk), &addr->addr); |
73 | if (!dev) { |
74 | err = -ENODEV; |
75 | goto out; |
76 | } |
77 | |
78 | if (dev->type != ARPHRD_IEEE802154) { |
79 | err = -ENODEV; |
80 | goto out_put; |
81 | } |
82 | |
83 | sk->sk_bound_dev_if = dev->ifindex; |
84 | sk_dst_reset(sk); |
85 | |
86 | out_put: |
87 | dev_put(dev); |
88 | out: |
89 | release_sock(sk); |
90 | |
91 | return err; |
92 | } |
93 | |
94 | static int raw_connect(struct sock *sk, struct sockaddr *uaddr, |
95 | int addr_len) |
96 | { |
97 | return -ENOTSUPP; |
98 | } |
99 | |
100 | static int raw_disconnect(struct sock *sk, int flags) |
101 | { |
102 | return 0; |
103 | } |
104 | |
105 | static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
106 | size_t size) |
107 | { |
108 | struct net_device *dev; |
109 | unsigned mtu; |
110 | struct sk_buff *skb; |
111 | int err; |
112 | |
113 | if (msg->msg_flags & MSG_OOB) { |
114 | pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags); |
115 | return -EOPNOTSUPP; |
116 | } |
117 | |
118 | lock_sock(sk); |
119 | if (!sk->sk_bound_dev_if) |
120 | dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); |
121 | else |
122 | dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if); |
123 | release_sock(sk); |
124 | |
125 | if (!dev) { |
126 | pr_debug("no dev\n"); |
127 | err = -ENXIO; |
128 | goto out; |
129 | } |
130 | |
131 | mtu = dev->mtu; |
132 | pr_debug("name = %s, mtu = %u\n", dev->name, mtu); |
133 | |
134 | if (size > mtu) { |
135 | pr_debug("size = %Zu, mtu = %u\n", size, mtu); |
136 | err = -EINVAL; |
137 | goto out_dev; |
138 | } |
139 | |
140 | skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size, |
141 | msg->msg_flags & MSG_DONTWAIT, &err); |
142 | if (!skb) |
143 | goto out_dev; |
144 | |
145 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
146 | |
147 | skb_reset_mac_header(skb); |
148 | skb_reset_network_header(skb); |
149 | |
150 | err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size); |
151 | if (err < 0) |
152 | goto out_skb; |
153 | |
154 | skb->dev = dev; |
155 | skb->sk = sk; |
156 | skb->protocol = htons(ETH_P_IEEE802154); |
157 | |
158 | dev_put(dev); |
159 | |
160 | err = dev_queue_xmit(skb); |
161 | if (err > 0) |
162 | err = net_xmit_errno(err); |
163 | |
164 | return err ?: size; |
165 | |
166 | out_skb: |
167 | kfree_skb(skb); |
168 | out_dev: |
169 | dev_put(dev); |
170 | out: |
171 | return err; |
172 | } |
173 | |
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) |
176 | { |
177 | size_t copied = 0; |
178 | int err = -EOPNOTSUPP; |
179 | struct sk_buff *skb; |
180 | |
181 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
182 | if (!skb) |
183 | goto out; |
184 | |
185 | copied = skb->len; |
186 | if (len < copied) { |
187 | msg->msg_flags |= MSG_TRUNC; |
188 | copied = len; |
189 | } |
190 | |
191 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
192 | if (err) |
193 | goto done; |
194 | |
195 | sock_recv_ts_and_drops(msg, sk, skb); |
196 | |
197 | if (flags & MSG_TRUNC) |
198 | copied = skb->len; |
199 | done: |
200 | skb_free_datagram(sk, skb); |
201 | out: |
202 | if (err) |
203 | return err; |
204 | return copied; |
205 | } |
206 | |
207 | static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) |
208 | { |
209 | if (sock_queue_rcv_skb(sk, skb) < 0) { |
210 | kfree_skb(skb); |
211 | return NET_RX_DROP; |
212 | } |
213 | |
214 | return NET_RX_SUCCESS; |
215 | } |
216 | |
217 | |
218 | void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb) |
219 | { |
220 | struct sock *sk; |
221 | struct hlist_node *node; |
222 | |
223 | read_lock(&raw_lock); |
224 | sk_for_each(sk, node, &raw_head) { |
225 | bh_lock_sock(sk); |
226 | if (!sk->sk_bound_dev_if || |
227 | sk->sk_bound_dev_if == dev->ifindex) { |
228 | |
229 | struct sk_buff *clone; |
230 | |
231 | clone = skb_clone(skb, GFP_ATOMIC); |
232 | if (clone) |
233 | raw_rcv_skb(sk, clone); |
234 | } |
235 | bh_unlock_sock(sk); |
236 | } |
237 | read_unlock(&raw_lock); |
238 | } |
239 | |
240 | static int raw_getsockopt(struct sock *sk, int level, int optname, |
241 | char __user *optval, int __user *optlen) |
242 | { |
243 | return -EOPNOTSUPP; |
244 | } |
245 | |
246 | static int raw_setsockopt(struct sock *sk, int level, int optname, |
247 | char __user *optval, unsigned int optlen) |
248 | { |
249 | return -EOPNOTSUPP; |
250 | } |
251 | |
252 | struct proto ieee802154_raw_prot = { |
253 | .name = "IEEE-802.15.4-RAW", |
254 | .owner = THIS_MODULE, |
255 | .obj_size = sizeof(struct sock), |
256 | .close = raw_close, |
257 | .bind = raw_bind, |
258 | .sendmsg = raw_sendmsg, |
259 | .recvmsg = raw_recvmsg, |
260 | .hash = raw_hash, |
261 | .unhash = raw_unhash, |
262 | .connect = raw_connect, |
263 | .disconnect = raw_disconnect, |
264 | .getsockopt = raw_getsockopt, |
265 | .setsockopt = raw_setsockopt, |
266 | }; |
267 | |
268 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9