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1/*
2 * net/tipc/netlink.c: TIPC configuration handling
3 *
4 * Copyright (c) 2005-2006, 2014, Ericsson AB
5 * Copyright (c) 2005-2007, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "socket.h"
39#include "name_table.h"
40#include "bearer.h"
41#include "link.h"
42#include "node.h"
43#include "net.h"
44#include <net/genetlink.h>
45
46static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
47 [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
48 [TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
49 [TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
50 [TIPC_NLA_PUBL] = { .type = NLA_NESTED, },
51 [TIPC_NLA_LINK] = { .type = NLA_NESTED, },
52 [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, },
53 [TIPC_NLA_NODE] = { .type = NLA_NESTED, },
54 [TIPC_NLA_NET] = { .type = NLA_NESTED, },
55 [TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, }
56};
57
58const struct nla_policy
59tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = {
60 [TIPC_NLA_NAME_TABLE_UNSPEC] = { .type = NLA_UNSPEC },
61 [TIPC_NLA_NAME_TABLE_PUBL] = { .type = NLA_NESTED }
62};
63
64const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
65 [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC },
66 [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 },
67 [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 },
68 [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED },
69 [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG }
70};
71
72const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
73 [TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC },
74 [TIPC_NLA_NET_ID] = { .type = NLA_U32 }
75};
76
77const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
78 [TIPC_NLA_LINK_UNSPEC] = { .type = NLA_UNSPEC },
79 [TIPC_NLA_LINK_NAME] = { .type = NLA_STRING,
80 .len = TIPC_MAX_LINK_NAME },
81 [TIPC_NLA_LINK_MTU] = { .type = NLA_U32 },
82 [TIPC_NLA_LINK_BROADCAST] = { .type = NLA_FLAG },
83 [TIPC_NLA_LINK_UP] = { .type = NLA_FLAG },
84 [TIPC_NLA_LINK_ACTIVE] = { .type = NLA_FLAG },
85 [TIPC_NLA_LINK_PROP] = { .type = NLA_NESTED },
86 [TIPC_NLA_LINK_STATS] = { .type = NLA_NESTED },
87 [TIPC_NLA_LINK_RX] = { .type = NLA_U32 },
88 [TIPC_NLA_LINK_TX] = { .type = NLA_U32 }
89};
90
91const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
92 [TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC },
93 [TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 },
94 [TIPC_NLA_NODE_UP] = { .type = NLA_FLAG }
95};
96
97/* Properties valid for media, bearer and link */
98const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
99 [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC },
100 [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 },
101 [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 },
102 [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 }
103};
104
105const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
106 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
107 [TIPC_NLA_BEARER_NAME] = { .type = NLA_STRING,
108 .len = TIPC_MAX_BEARER_NAME },
109 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
110 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
111};
112
113const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
114 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
115 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
116 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
117};
118
119const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
120 [TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC},
121 [TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY,
122 .len = sizeof(struct sockaddr_storage)},
123 [TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY,
124 .len = sizeof(struct sockaddr_storage)},
125};
126
127/* Users of the legacy API (tipc-config) can't handle that we add operations,
128 * so we have a separate genl handling for the new API.
129 */
130struct genl_family tipc_genl_family = {
131 .id = GENL_ID_GENERATE,
132 .name = TIPC_GENL_V2_NAME,
133 .version = TIPC_GENL_V2_VERSION,
134 .hdrsize = 0,
135 .maxattr = TIPC_NLA_MAX,
136 .netnsok = true,
137};
138
139static const struct genl_ops tipc_genl_v2_ops[] = {
140 {
141 .cmd = TIPC_NL_BEARER_DISABLE,
142 .doit = tipc_nl_bearer_disable,
143 .policy = tipc_nl_policy,
144 },
145 {
146 .cmd = TIPC_NL_BEARER_ENABLE,
147 .doit = tipc_nl_bearer_enable,
148 .policy = tipc_nl_policy,
149 },
150 {
151 .cmd = TIPC_NL_BEARER_GET,
152 .doit = tipc_nl_bearer_get,
153 .dumpit = tipc_nl_bearer_dump,
154 .policy = tipc_nl_policy,
155 },
156 {
157 .cmd = TIPC_NL_BEARER_SET,
158 .doit = tipc_nl_bearer_set,
159 .policy = tipc_nl_policy,
160 },
161 {
162 .cmd = TIPC_NL_SOCK_GET,
163 .dumpit = tipc_nl_sk_dump,
164 .policy = tipc_nl_policy,
165 },
166 {
167 .cmd = TIPC_NL_PUBL_GET,
168 .dumpit = tipc_nl_publ_dump,
169 .policy = tipc_nl_policy,
170 },
171 {
172 .cmd = TIPC_NL_LINK_GET,
173 .doit = tipc_nl_node_get_link,
174 .dumpit = tipc_nl_node_dump_link,
175 .policy = tipc_nl_policy,
176 },
177 {
178 .cmd = TIPC_NL_LINK_SET,
179 .doit = tipc_nl_node_set_link,
180 .policy = tipc_nl_policy,
181 },
182 {
183 .cmd = TIPC_NL_LINK_RESET_STATS,
184 .doit = tipc_nl_node_reset_link_stats,
185 .policy = tipc_nl_policy,
186 },
187 {
188 .cmd = TIPC_NL_MEDIA_GET,
189 .doit = tipc_nl_media_get,
190 .dumpit = tipc_nl_media_dump,
191 .policy = tipc_nl_policy,
192 },
193 {
194 .cmd = TIPC_NL_MEDIA_SET,
195 .doit = tipc_nl_media_set,
196 .policy = tipc_nl_policy,
197 },
198 {
199 .cmd = TIPC_NL_NODE_GET,
200 .dumpit = tipc_nl_node_dump,
201 .policy = tipc_nl_policy,
202 },
203 {
204 .cmd = TIPC_NL_NET_GET,
205 .dumpit = tipc_nl_net_dump,
206 .policy = tipc_nl_policy,
207 },
208 {
209 .cmd = TIPC_NL_NET_SET,
210 .doit = tipc_nl_net_set,
211 .policy = tipc_nl_policy,
212 },
213 {
214 .cmd = TIPC_NL_NAME_TABLE_GET,
215 .dumpit = tipc_nl_name_table_dump,
216 .policy = tipc_nl_policy,
217 }
218};
219
220int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
221{
222 u32 maxattr = tipc_genl_family.maxattr;
223
224 *attr = tipc_genl_family.attrbuf;
225 if (!*attr)
226 return -EOPNOTSUPP;
227
228 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
229}
230
231int tipc_netlink_start(void)
232{
233 int res;
234
235 res = genl_register_family_with_ops(&tipc_genl_family,
236 tipc_genl_v2_ops);
237 if (res) {
238 pr_err("Failed to register netlink interface\n");
239 return res;
240 }
241 return 0;
242}
243
244void tipc_netlink_stop(void)
245{
246 genl_unregister_family(&tipc_genl_family);
247}
1/*
2 * net/tipc/netlink.c: TIPC configuration handling
3 *
4 * Copyright (c) 2005-2006, Ericsson AB
5 * Copyright (c) 2005-2007, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "config.h"
39#include <net/genetlink.h>
40
41static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
42{
43 struct sk_buff *rep_buf;
44 struct nlmsghdr *rep_nlh;
45 struct nlmsghdr *req_nlh = info->nlhdr;
46 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
47 int hdr_space = NLMSG_SPACE(GENL_HDRLEN + TIPC_GENL_HDRLEN);
48 u16 cmd;
49
50 if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN)))
51 cmd = TIPC_CMD_NOT_NET_ADMIN;
52 else
53 cmd = req_userhdr->cmd;
54
55 rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd,
56 NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
57 NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
58 hdr_space);
59
60 if (rep_buf) {
61 skb_push(rep_buf, hdr_space);
62 rep_nlh = nlmsg_hdr(rep_buf);
63 memcpy(rep_nlh, req_nlh, hdr_space);
64 rep_nlh->nlmsg_len = rep_buf->len;
65 genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).pid);
66 }
67
68 return 0;
69}
70
71static struct genl_family tipc_genl_family = {
72 .id = GENL_ID_GENERATE,
73 .name = TIPC_GENL_NAME,
74 .version = TIPC_GENL_VERSION,
75 .hdrsize = TIPC_GENL_HDRLEN,
76 .maxattr = 0,
77};
78
79static struct genl_ops tipc_genl_ops = {
80 .cmd = TIPC_GENL_CMD,
81 .doit = handle_cmd,
82};
83
84static int tipc_genl_family_registered;
85
86int tipc_netlink_start(void)
87{
88 int res;
89
90 res = genl_register_family_with_ops(&tipc_genl_family,
91 &tipc_genl_ops, 1);
92 if (res) {
93 err("Failed to register netlink interface\n");
94 return res;
95 }
96
97 tipc_genl_family_registered = 1;
98 return 0;
99}
100
101void tipc_netlink_stop(void)
102{
103 if (!tipc_genl_family_registered)
104 return;
105
106 genl_unregister_family(&tipc_genl_family);
107 tipc_genl_family_registered = 0;
108}