1/*
2 * Netlink interface for IEEE 802.15.4 stack
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 * Written by:
16 * Sergey Lapin <slapin@ossfans.org>
17 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
18 * Maxim Osipov <maxim.osipov@siemens.com>
19 */
20
21#include <linux/kernel.h>
22#include <linux/gfp.h>
23#include <net/genetlink.h>
24#include <linux/nl802154.h>
25
26#include "ieee802154.h"
27
28static unsigned int ieee802154_seq_num;
29static DEFINE_SPINLOCK(ieee802154_seq_lock);
30
31struct genl_family nl802154_family = {
32	.id		= GENL_ID_GENERATE,
33	.hdrsize	= 0,
34	.name		= IEEE802154_NL_NAME,
35	.version	= 1,
36	.maxattr	= IEEE802154_ATTR_MAX,
37};
38
39/* Requests to userspace */
40struct sk_buff *ieee802154_nl_create(int flags, u8 req)
41{
42	void *hdr;
43	struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
44	unsigned long f;
45
46	if (!msg)
47		return NULL;
48
49	spin_lock_irqsave(&ieee802154_seq_lock, f);
50	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
51			  &nl802154_family, flags, req);
52	spin_unlock_irqrestore(&ieee802154_seq_lock, f);
53	if (!hdr) {
54		nlmsg_free(msg);
55		return NULL;
56	}
57
58	return msg;
59}
60
61int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
62{
63	struct nlmsghdr *nlh = nlmsg_hdr(msg);
64	void *hdr = genlmsg_data(nlmsg_data(nlh));
65
66	genlmsg_end(msg, hdr);
67
68	return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
69}
70
71struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
72					int flags, u8 req)
73{
74	void *hdr;
75	struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
76
77	if (!msg)
78		return NULL;
79
80	hdr = genlmsg_put_reply(msg, info,
81				&nl802154_family, flags, req);
82	if (!hdr) {
83		nlmsg_free(msg);
84		return NULL;
85	}
86
87	return msg;
88}
89
90int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
91{
92	struct nlmsghdr *nlh = nlmsg_hdr(msg);
93	void *hdr = genlmsg_data(nlmsg_data(nlh));
94
95	genlmsg_end(msg, hdr);
96
97	return genlmsg_reply(msg, info);
98}
99
100static const struct genl_ops ieee8021154_ops[] = {
101	/* see nl-phy.c */
102	IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
103			ieee802154_dump_phy),
104	IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
105	IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
106	/* see nl-mac.c */
107	IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
108	IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
109	IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
110	IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
111	IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
112	IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
113			ieee802154_dump_iface),
114	IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams),
115	IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams),
116	IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams),
117	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL,
118			ieee802154_llsec_dump_keys),
119	IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key),
120	IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key),
121	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL,
122			ieee802154_llsec_dump_devs),
123	IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev),
124	IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev),
125	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL,
126			ieee802154_llsec_dump_devkeys),
127	IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey),
128	IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey),
129	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL,
130			ieee802154_llsec_dump_seclevels),
131	IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL,
132		      ieee802154_llsec_add_seclevel),
133	IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL,
134		      ieee802154_llsec_del_seclevel),
135};
136
137static const struct genl_multicast_group ieee802154_mcgrps[] = {
138	[IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
139	[IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
140};
141
142int __init ieee802154_nl_init(void)
143{
144	return genl_register_family_with_ops_groups(&nl802154_family,
145						    ieee8021154_ops,
146						    ieee802154_mcgrps);
147}
148
149void ieee802154_nl_exit(void)
150{
151	genl_unregister_family(&nl802154_family);
152}
153