xref: /openbmc/linux/net/ieee802154/netlink.c (revision d2999e1b)
1 /*
2  * Netlink inteface 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  * 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  * Maxim Osipov <maxim.osipov@siemens.com>
23  */
24 
25 #include <linux/kernel.h>
26 #include <linux/gfp.h>
27 #include <net/genetlink.h>
28 #include <linux/nl802154.h>
29 
30 #include "ieee802154.h"
31 
32 static unsigned int ieee802154_seq_num;
33 static DEFINE_SPINLOCK(ieee802154_seq_lock);
34 
35 struct genl_family nl802154_family = {
36 	.id		= GENL_ID_GENERATE,
37 	.hdrsize	= 0,
38 	.name		= IEEE802154_NL_NAME,
39 	.version	= 1,
40 	.maxattr	= IEEE802154_ATTR_MAX,
41 };
42 
43 /* Requests to userspace */
44 struct sk_buff *ieee802154_nl_create(int flags, u8 req)
45 {
46 	void *hdr;
47 	struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
48 	unsigned long f;
49 
50 	if (!msg)
51 		return NULL;
52 
53 	spin_lock_irqsave(&ieee802154_seq_lock, f);
54 	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
55 			&nl802154_family, flags, req);
56 	spin_unlock_irqrestore(&ieee802154_seq_lock, f);
57 	if (!hdr) {
58 		nlmsg_free(msg);
59 		return NULL;
60 	}
61 
62 	return msg;
63 }
64 
65 int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
66 {
67 	struct nlmsghdr *nlh = nlmsg_hdr(msg);
68 	void *hdr = genlmsg_data(nlmsg_data(nlh));
69 
70 	if (genlmsg_end(msg, hdr) < 0)
71 		goto out;
72 
73 	return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
74 out:
75 	nlmsg_free(msg);
76 	return -ENOBUFS;
77 }
78 
79 struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
80 		int flags, u8 req)
81 {
82 	void *hdr;
83 	struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
84 
85 	if (!msg)
86 		return NULL;
87 
88 	hdr = genlmsg_put_reply(msg, info,
89 			&nl802154_family, flags, req);
90 	if (!hdr) {
91 		nlmsg_free(msg);
92 		return NULL;
93 	}
94 
95 	return msg;
96 }
97 
98 int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
99 {
100 	struct nlmsghdr *nlh = nlmsg_hdr(msg);
101 	void *hdr = genlmsg_data(nlmsg_data(nlh));
102 
103 	if (genlmsg_end(msg, hdr) < 0)
104 		goto out;
105 
106 	return genlmsg_reply(msg, info);
107 out:
108 	nlmsg_free(msg);
109 	return -ENOBUFS;
110 }
111 
112 static const struct genl_ops ieee8021154_ops[] = {
113 	/* see nl-phy.c */
114 	IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
115 			ieee802154_dump_phy),
116 	IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
117 	IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
118 	/* see nl-mac.c */
119 	IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
120 	IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
121 	IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
122 	IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
123 	IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
124 	IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
125 			ieee802154_dump_iface),
126 	IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams),
127 	IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams),
128 	IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams),
129 	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL,
130 			ieee802154_llsec_dump_keys),
131 	IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key),
132 	IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key),
133 	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL,
134 			ieee802154_llsec_dump_devs),
135 	IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev),
136 	IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev),
137 	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL,
138 			ieee802154_llsec_dump_devkeys),
139 	IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey),
140 	IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey),
141 	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL,
142 			ieee802154_llsec_dump_seclevels),
143 	IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL,
144 		      ieee802154_llsec_add_seclevel),
145 	IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL,
146 		      ieee802154_llsec_del_seclevel),
147 };
148 
149 static const struct genl_multicast_group ieee802154_mcgrps[] = {
150 	[IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
151 	[IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
152 };
153 
154 
155 int __init ieee802154_nl_init(void)
156 {
157 	return genl_register_family_with_ops_groups(&nl802154_family,
158 						    ieee8021154_ops,
159 						    ieee802154_mcgrps);
160 }
161 
162 void __exit ieee802154_nl_exit(void)
163 {
164 	genl_unregister_family(&nl802154_family);
165 }
166