1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Netlink interface for IEEE 802.15.4 stack
4 *
5 * Copyright 2007, 2008 Siemens AG
6 *
7 * Written by:
8 * Sergey Lapin <slapin@ossfans.org>
9 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
10 * Maxim Osipov <maxim.osipov@siemens.com>
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/gfp.h>
15 #include <net/genetlink.h>
16 #include <linux/nl802154.h>
17
18 #include "ieee802154.h"
19
20 static unsigned int ieee802154_seq_num;
21 static DEFINE_SPINLOCK(ieee802154_seq_lock);
22
23 /* Requests to userspace */
ieee802154_nl_create(int flags,u8 req)24 struct sk_buff *ieee802154_nl_create(int flags, u8 req)
25 {
26 void *hdr;
27 struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
28 unsigned long f;
29
30 if (!msg)
31 return NULL;
32
33 spin_lock_irqsave(&ieee802154_seq_lock, f);
34 hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
35 &nl802154_family, flags, req);
36 spin_unlock_irqrestore(&ieee802154_seq_lock, f);
37 if (!hdr) {
38 nlmsg_free(msg);
39 return NULL;
40 }
41
42 return msg;
43 }
44
ieee802154_nl_mcast(struct sk_buff * msg,unsigned int group)45 int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
46 {
47 struct nlmsghdr *nlh = nlmsg_hdr(msg);
48 void *hdr = genlmsg_data(nlmsg_data(nlh));
49
50 genlmsg_end(msg, hdr);
51
52 return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
53 }
54
ieee802154_nl_new_reply(struct genl_info * info,int flags,u8 req)55 struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
56 int flags, u8 req)
57 {
58 void *hdr;
59 struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
60
61 if (!msg)
62 return NULL;
63
64 hdr = genlmsg_put_reply(msg, info,
65 &nl802154_family, flags, req);
66 if (!hdr) {
67 nlmsg_free(msg);
68 return NULL;
69 }
70
71 return msg;
72 }
73
ieee802154_nl_reply(struct sk_buff * msg,struct genl_info * info)74 int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
75 {
76 struct nlmsghdr *nlh = nlmsg_hdr(msg);
77 void *hdr = genlmsg_data(nlmsg_data(nlh));
78
79 genlmsg_end(msg, hdr);
80
81 return genlmsg_reply(msg, info);
82 }
83
84 static const struct genl_small_ops ieee802154_ops[] = {
85 /* see nl-phy.c */
86 IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
87 ieee802154_dump_phy),
88 IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
89 IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
90 /* see nl-mac.c */
91 IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
92 IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
93 IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
94 IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
95 IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
96 IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
97 ieee802154_dump_iface),
98 IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams),
99 IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams),
100 IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams),
101 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL,
102 ieee802154_llsec_dump_keys),
103 IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key),
104 IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key),
105 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL,
106 ieee802154_llsec_dump_devs),
107 IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev),
108 IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev),
109 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL,
110 ieee802154_llsec_dump_devkeys),
111 IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey),
112 IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey),
113 IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL,
114 ieee802154_llsec_dump_seclevels),
115 IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL,
116 ieee802154_llsec_add_seclevel),
117 IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL,
118 ieee802154_llsec_del_seclevel),
119 };
120
121 static const struct genl_multicast_group ieee802154_mcgrps[] = {
122 [IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
123 [IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
124 };
125
126 struct genl_family nl802154_family __ro_after_init = {
127 .hdrsize = 0,
128 .name = IEEE802154_NL_NAME,
129 .version = 1,
130 .maxattr = IEEE802154_ATTR_MAX,
131 .policy = ieee802154_policy,
132 .module = THIS_MODULE,
133 .small_ops = ieee802154_ops,
134 .n_small_ops = ARRAY_SIZE(ieee802154_ops),
135 .resv_start_op = IEEE802154_LLSEC_DEL_SECLEVEL + 1,
136 .mcgrps = ieee802154_mcgrps,
137 .n_mcgrps = ARRAY_SIZE(ieee802154_mcgrps),
138 };
139
ieee802154_nl_init(void)140 int __init ieee802154_nl_init(void)
141 {
142 return genl_register_family(&nl802154_family);
143 }
144
ieee802154_nl_exit(void)145 void ieee802154_nl_exit(void)
146 {
147 genl_unregister_family(&nl802154_family);
148 }
149