2 * IEEE 802.15.4 dgram 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.
16 * Sergey Lapin <slapin@ossfans.org>
17 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
20 #include <linux/capability.h>
21 #include <linux/net.h>
22 #include <linux/module.h>
23 #include <linux/if_arp.h>
24 #include <linux/list.h>
25 #include <linux/slab.h>
26 #include <linux/ieee802154.h>
28 #include <net/af_ieee802154.h>
29 #include <net/ieee802154_netdev.h>
31 #include <asm/ioctls.h>
35 static HLIST_HEAD(dgram_head);
36 static DEFINE_RWLOCK(dgram_lock);
41 struct ieee802154_addr src_addr;
42 struct ieee802154_addr dst_addr;
45 unsigned int connected:1;
46 unsigned int want_ack:1;
48 unsigned int secen_override:1;
49 unsigned int seclevel:3;
50 unsigned int seclevel_override:1;
53 static inline struct dgram_sock *dgram_sk(const struct sock *sk)
55 return container_of(sk, struct dgram_sock, sk);
58 static void dgram_hash(struct sock *sk)
60 write_lock_bh(&dgram_lock);
61 sk_add_node(sk, &dgram_head);
62 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
63 write_unlock_bh(&dgram_lock);
66 static void dgram_unhash(struct sock *sk)
68 write_lock_bh(&dgram_lock);
69 if (sk_del_node_init(sk))
70 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
71 write_unlock_bh(&dgram_lock);
74 static int dgram_init(struct sock *sk)
76 struct dgram_sock *ro = dgram_sk(sk);
82 static void dgram_close(struct sock *sk, long timeout)
84 sk_common_release(sk);
87 static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len)
89 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
90 struct ieee802154_addr haddr;
91 struct dgram_sock *ro = dgram_sk(sk);
93 struct net_device *dev;
99 if (len < sizeof(*addr))
102 if (addr->family != AF_IEEE802154)
105 ieee802154_addr_from_sa(&haddr, &addr->addr);
106 dev = ieee802154_get_dev(sock_net(sk), &haddr);
112 if (dev->type != ARPHRD_IEEE802154) {
117 ro->src_addr = haddr;
129 static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg)
134 int amount = sk_wmem_alloc_get(sk);
136 return put_user(amount, (int __user *)arg);
142 unsigned long amount;
145 spin_lock_bh(&sk->sk_receive_queue.lock);
146 skb = skb_peek(&sk->sk_receive_queue);
148 /* We will only return the amount
149 * of this packet since that is all
152 amount = skb->len - ieee802154_hdr_length(skb);
154 spin_unlock_bh(&sk->sk_receive_queue.lock);
155 return put_user(amount, (int __user *)arg);
162 /* FIXME: autobind */
163 static int dgram_connect(struct sock *sk, struct sockaddr *uaddr,
166 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
167 struct dgram_sock *ro = dgram_sk(sk);
170 if (len < sizeof(*addr))
173 if (addr->family != AF_IEEE802154)
183 ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr);
191 static int dgram_disconnect(struct sock *sk, int flags)
193 struct dgram_sock *ro = dgram_sk(sk);
202 static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk,
203 struct msghdr *msg, size_t size)
205 struct net_device *dev;
208 struct ieee802154_mac_cb *cb;
209 struct dgram_sock *ro = dgram_sk(sk);
210 struct ieee802154_addr dst_addr;
214 if (msg->msg_flags & MSG_OOB) {
215 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
219 if (!ro->connected && !msg->msg_name)
220 return -EDESTADDRREQ;
221 else if (ro->connected && msg->msg_name)
225 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
227 dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr);
230 pr_debug("no dev\n");
235 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
238 pr_debug("size = %Zu, mtu = %u\n", size, mtu);
243 hlen = LL_RESERVED_SPACE(dev);
244 tlen = dev->needed_tailroom;
245 skb = sock_alloc_send_skb(sk, hlen + tlen + size,
246 msg->msg_flags & MSG_DONTWAIT,
251 skb_reserve(skb, hlen);
253 skb_reset_network_header(skb);
255 cb = mac_cb_init(skb);
256 cb->type = IEEE802154_FC_TYPE_DATA;
257 cb->ackreq = ro->want_ack;
260 DECLARE_SOCKADDR(struct sockaddr_ieee802154*,
261 daddr, msg->msg_name);
263 ieee802154_addr_from_sa(&dst_addr, &daddr->addr);
265 dst_addr = ro->dst_addr;
268 cb->secen = ro->secen;
269 cb->secen_override = ro->secen_override;
270 cb->seclevel = ro->seclevel;
271 cb->seclevel_override = ro->seclevel_override;
273 err = dev_hard_header(skb, dev, ETH_P_IEEE802154, &dst_addr,
274 ro->bound ? &ro->src_addr : NULL, size);
278 err = memcpy_from_msg(skb_put(skb, size), msg, size);
284 skb->protocol = htons(ETH_P_IEEE802154);
288 err = dev_queue_xmit(skb);
290 err = net_xmit_errno(err);
302 static int dgram_recvmsg(struct kiocb *iocb, struct sock *sk,
303 struct msghdr *msg, size_t len, int noblock,
304 int flags, int *addr_len)
307 int err = -EOPNOTSUPP;
309 DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name);
311 skb = skb_recv_datagram(sk, flags, noblock, &err);
317 msg->msg_flags |= MSG_TRUNC;
321 /* FIXME: skip headers if necessary ?! */
322 err = skb_copy_datagram_msg(skb, 0, msg, copied);
326 sock_recv_ts_and_drops(msg, sk, skb);
329 saddr->family = AF_IEEE802154;
330 ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source);
331 *addr_len = sizeof(*saddr);
334 if (flags & MSG_TRUNC)
337 skb_free_datagram(sk, skb);
344 static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb)
346 skb = skb_share_check(skb, GFP_ATOMIC);
350 if (sock_queue_rcv_skb(sk, skb) < 0) {
355 return NET_RX_SUCCESS;
359 ieee802154_match_sock(__le64 hw_addr, __le16 pan_id, __le16 short_addr,
360 struct dgram_sock *ro)
365 if (ro->src_addr.mode == IEEE802154_ADDR_LONG &&
366 hw_addr == ro->src_addr.extended_addr)
369 if (ro->src_addr.mode == IEEE802154_ADDR_SHORT &&
370 pan_id == ro->src_addr.pan_id &&
371 short_addr == ro->src_addr.short_addr)
377 int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb)
379 struct sock *sk, *prev = NULL;
380 int ret = NET_RX_SUCCESS;
381 __le16 pan_id, short_addr;
384 /* Data frame processing */
385 BUG_ON(dev->type != ARPHRD_IEEE802154);
387 pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
388 short_addr = ieee802154_mlme_ops(dev)->get_short_addr(dev);
389 hw_addr = ieee802154_devaddr_from_raw(dev->dev_addr);
391 read_lock(&dgram_lock);
392 sk_for_each(sk, &dgram_head) {
393 if (ieee802154_match_sock(hw_addr, pan_id, short_addr,
396 struct sk_buff *clone;
398 clone = skb_clone(skb, GFP_ATOMIC);
400 dgram_rcv_skb(prev, clone);
408 dgram_rcv_skb(prev, skb);
413 read_unlock(&dgram_lock);
418 static int dgram_getsockopt(struct sock *sk, int level, int optname,
419 char __user *optval, int __user *optlen)
421 struct dgram_sock *ro = dgram_sk(sk);
425 if (level != SOL_IEEE802154)
428 if (get_user(len, optlen))
431 len = min_t(unsigned int, len, sizeof(int));
438 if (!ro->secen_override)
439 val = WPAN_SECURITY_DEFAULT;
441 val = WPAN_SECURITY_ON;
443 val = WPAN_SECURITY_OFF;
445 case WPAN_SECURITY_LEVEL:
446 if (!ro->seclevel_override)
447 val = WPAN_SECURITY_LEVEL_DEFAULT;
455 if (put_user(len, optlen))
457 if (copy_to_user(optval, &val, len))
462 static int dgram_setsockopt(struct sock *sk, int level, int optname,
463 char __user *optval, unsigned int optlen)
465 struct dgram_sock *ro = dgram_sk(sk);
466 struct net *net = sock_net(sk);
470 if (optlen < sizeof(int))
473 if (get_user(val, (int __user *)optval))
480 ro->want_ack = !!val;
483 if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
484 !ns_capable(net->user_ns, CAP_NET_RAW)) {
490 case WPAN_SECURITY_DEFAULT:
491 ro->secen_override = 0;
493 case WPAN_SECURITY_ON:
494 ro->secen_override = 1;
497 case WPAN_SECURITY_OFF:
498 ro->secen_override = 1;
506 case WPAN_SECURITY_LEVEL:
507 if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
508 !ns_capable(net->user_ns, CAP_NET_RAW)) {
513 if (val < WPAN_SECURITY_LEVEL_DEFAULT ||
514 val > IEEE802154_SCF_SECLEVEL_ENC_MIC128) {
516 } else if (val == WPAN_SECURITY_LEVEL_DEFAULT) {
517 ro->seclevel_override = 0;
519 ro->seclevel_override = 1;
532 struct proto ieee802154_dgram_prot = {
533 .name = "IEEE-802.15.4-MAC",
534 .owner = THIS_MODULE,
535 .obj_size = sizeof(struct dgram_sock),
537 .close = dgram_close,
539 .sendmsg = dgram_sendmsg,
540 .recvmsg = dgram_recvmsg,
542 .unhash = dgram_unhash,
543 .connect = dgram_connect,
544 .disconnect = dgram_disconnect,
545 .ioctl = dgram_ioctl,
546 .getsockopt = dgram_getsockopt,
547 .setsockopt = dgram_setsockopt,