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 */ |
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(skb: msg, portid: 0, seq: ieee802154_seq_num++, |
35 | family: &nl802154_family, flags, cmd: req); |
36 | spin_unlock_irqrestore(lock: &ieee802154_seq_lock, flags: f); |
37 | if (!hdr) { |
38 | nlmsg_free(skb: msg); |
39 | return NULL; |
40 | } |
41 | |
42 | return msg; |
43 | } |
44 | |
45 | int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group) |
46 | { |
47 | struct nlmsghdr *nlh = nlmsg_hdr(skb: msg); |
48 | void *hdr = genlmsg_data(gnlh: nlmsg_data(nlh)); |
49 | |
50 | genlmsg_end(skb: msg, hdr); |
51 | |
52 | return genlmsg_multicast(family: &nl802154_family, skb: msg, portid: 0, group, GFP_ATOMIC); |
53 | } |
54 | |
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(skb: msg, info, |
65 | family: &nl802154_family, flags, cmd: req); |
66 | if (!hdr) { |
67 | nlmsg_free(skb: msg); |
68 | return NULL; |
69 | } |
70 | |
71 | return msg; |
72 | } |
73 | |
74 | int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info) |
75 | { |
76 | struct nlmsghdr *nlh = nlmsg_hdr(skb: msg); |
77 | void *hdr = genlmsg_data(gnlh: nlmsg_data(nlh)); |
78 | |
79 | genlmsg_end(skb: msg, hdr); |
80 | |
81 | return genlmsg_reply(skb: 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 | |
140 | int __init ieee802154_nl_init(void) |
141 | { |
142 | return genl_register_family(family: &nl802154_family); |
143 | } |
144 | |
145 | void ieee802154_nl_exit(void) |
146 | { |
147 | genl_unregister_family(family: &nl802154_family); |
148 | } |
149 | |