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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 | }; |
127 | |
128 | static const struct genl_multicast_group ieee802154_mcgrps[] = { |
129 | [IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, }, |
130 | [IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, }, |
131 | }; |
132 | |
133 | |
134 | int __init ieee802154_nl_init(void) |
135 | { |
136 | return genl_register_family_with_ops_groups(&nl802154_family, |
137 | ieee8021154_ops, |
138 | ieee802154_mcgrps); |
139 | } |
140 | |
141 | void __exit ieee802154_nl_exit(void) |
142 | { |
143 | genl_unregister_family(&nl802154_family); |
144 | } |
145 |
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