Commit | Line | Data |
---|---|---|
1eaa9d03 DES |
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 <net/netlink.h> | |
27 | #include <net/genetlink.h> | |
28 | #include <net/wpan-phy.h> | |
29 | #include <linux/nl802154.h> | |
30 | ||
31 | #include "ieee802154.h" | |
32 | ||
33 | static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 pid, | |
34 | u32 seq, int flags, struct wpan_phy *phy) | |
35 | { | |
36 | void *hdr; | |
37 | int i, pages = 0; | |
38 | uint32_t *buf = kzalloc(32 * sizeof(uint32_t), GFP_KERNEL); | |
39 | ||
40 | pr_debug("%s\n", __func__); | |
41 | ||
42 | if (!buf) | |
43 | goto out; | |
44 | ||
45 | hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags, | |
46 | IEEE802154_LIST_PHY); | |
47 | if (!hdr) | |
48 | goto out; | |
49 | ||
50 | mutex_lock(&phy->pib_lock); | |
51 | NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)); | |
52 | ||
53 | NLA_PUT_U8(msg, IEEE802154_ATTR_PAGE, phy->current_page); | |
54 | NLA_PUT_U8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel); | |
55 | for (i = 0; i < 32; i++) { | |
56 | if (phy->channels_supported[i]) | |
57 | buf[pages++] = phy->channels_supported[i] | (i << 27); | |
58 | } | |
59 | if (pages) | |
60 | NLA_PUT(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST, | |
61 | pages * sizeof(uint32_t), buf); | |
62 | ||
63 | mutex_unlock(&phy->pib_lock); | |
64 | return genlmsg_end(msg, hdr); | |
65 | ||
66 | nla_put_failure: | |
67 | mutex_unlock(&phy->pib_lock); | |
68 | genlmsg_cancel(msg, hdr); | |
69 | out: | |
70 | kfree(buf); | |
71 | return -EMSGSIZE; | |
72 | } | |
73 | ||
74 | static int ieee802154_list_phy(struct sk_buff *skb, | |
75 | struct genl_info *info) | |
76 | { | |
77 | /* Request for interface name, index, type, IEEE address, | |
78 | PAN Id, short address */ | |
79 | struct sk_buff *msg; | |
80 | struct wpan_phy *phy; | |
81 | const char *name; | |
82 | int rc = -ENOBUFS; | |
83 | ||
84 | pr_debug("%s\n", __func__); | |
85 | ||
86 | if (!info->attrs[IEEE802154_ATTR_PHY_NAME]) | |
87 | return -EINVAL; | |
88 | ||
89 | name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
90 | if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0') | |
91 | return -EINVAL; /* phy name should be null-terminated */ | |
92 | ||
93 | ||
94 | phy = wpan_phy_find(name); | |
95 | if (!phy) | |
96 | return -ENODEV; | |
97 | ||
98 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
99 | if (!msg) | |
100 | goto out_dev; | |
101 | ||
102 | rc = ieee802154_nl_fill_phy(msg, info->snd_pid, info->snd_seq, | |
103 | 0, phy); | |
104 | if (rc < 0) | |
105 | goto out_free; | |
106 | ||
107 | wpan_phy_put(phy); | |
108 | ||
109 | return genlmsg_reply(msg, info); | |
110 | out_free: | |
111 | nlmsg_free(msg); | |
112 | out_dev: | |
113 | wpan_phy_put(phy); | |
114 | return rc; | |
115 | ||
116 | } | |
117 | ||
118 | struct dump_phy_data { | |
119 | struct sk_buff *skb; | |
120 | struct netlink_callback *cb; | |
121 | int idx, s_idx; | |
122 | }; | |
123 | ||
124 | static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data) | |
125 | { | |
126 | int rc; | |
127 | struct dump_phy_data *data = _data; | |
128 | ||
129 | pr_debug("%s\n", __func__); | |
130 | ||
131 | if (data->idx++ < data->s_idx) | |
132 | return 0; | |
133 | ||
134 | rc = ieee802154_nl_fill_phy(data->skb, | |
135 | NETLINK_CB(data->cb->skb).pid, | |
136 | data->cb->nlh->nlmsg_seq, | |
137 | NLM_F_MULTI, | |
138 | phy); | |
139 | ||
140 | if (rc < 0) { | |
141 | data->idx--; | |
142 | return rc; | |
143 | } | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static int ieee802154_dump_phy(struct sk_buff *skb, | |
149 | struct netlink_callback *cb) | |
150 | { | |
151 | struct dump_phy_data data = { | |
152 | .cb = cb, | |
153 | .skb = skb, | |
154 | .s_idx = cb->args[0], | |
155 | .idx = 0, | |
156 | }; | |
157 | ||
158 | pr_debug("%s\n", __func__); | |
159 | ||
160 | wpan_phy_for_each(ieee802154_dump_phy_iter, &data); | |
161 | ||
162 | cb->args[0] = data.idx; | |
163 | ||
164 | return skb->len; | |
165 | } | |
166 | ||
167 | static struct genl_ops ieee802154_phy_ops[] = { | |
168 | IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy, | |
169 | ieee802154_dump_phy), | |
170 | }; | |
171 | ||
172 | /* | |
173 | * No need to unregister as family unregistration will do it. | |
174 | */ | |
175 | int nl802154_phy_register(void) | |
176 | { | |
177 | int i; | |
178 | int rc; | |
179 | ||
180 | for (i = 0; i < ARRAY_SIZE(ieee802154_phy_ops); i++) { | |
181 | rc = genl_register_ops(&nl802154_family, | |
182 | &ieee802154_phy_ops[i]); | |
183 | if (rc) | |
184 | return rc; | |
185 | } | |
186 | ||
187 | return 0; | |
188 | } |