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0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
0ad19a3f | 8 | * |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #ifndef __genl_h | |
24 | #define __genl_h | |
25 | ||
26 | /* | |
27 | * Use this as a good size to allocate route netlink messages | |
28 | */ | |
29 | #define RTNLMSG_GOOD_SIZE NLMSG_GOOD_SIZE | |
30 | #define RTNLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + RTNL_HDRLEN)) | |
31 | ||
32 | /* | |
f79d43bb | 33 | * struct genl_handler : the structure which store the netlink handler |
0ad19a3f | 34 | * and the family number |
35 | * | |
36 | * @nlh: the netlink socket handler | |
37 | */ | |
38 | struct rtnl_handler | |
39 | { | |
40 | struct nl_handler nlh; | |
41 | }; | |
42 | ||
43 | /* | |
44 | * struct rtnlmsg : the struct containing the route netlink message | |
45 | * format | |
46 | * | |
47 | * @nlmsghdr: a netlink message header | |
48 | * @rtnlmsghdr: a route netlink message header pointer | |
49 | * | |
50 | */ | |
51 | struct rtnlmsg { | |
52 | struct nlmsghdr nlmsghdr; | |
53 | }; | |
54 | ||
55 | /* | |
56 | * rtnetlink_open : open a route netlink socket | |
57 | * | |
58 | * @handler: a struct rtnl_handler pointer | |
59 | * | |
60 | * Returns 0 on success, < 0 otherwise | |
61 | */ | |
62 | int rtnetlink_open(struct rtnl_handler *handler); | |
63 | ||
64 | /* | |
65 | * genetlink_close : close a route netlink socket | |
66 | * | |
67 | * @handler: the handler of the socket to be closed | |
68 | * | |
69 | * Returns 0 on success, < 0 otherwise | |
70 | */ | |
71 | int rtnetlink_close(struct rtnl_handler *handler); | |
72 | ||
73 | /* | |
74 | * rtnetlink_rcv : receive a route netlink socket, it is up | |
75 | * to the caller to manage the allocation of the route netlink message | |
76 | * | |
77 | * @handler: the handler of the route netlink socket | |
78 | * @rtnlmsg: the pointer to a route netlink message pre-allocated | |
79 | * | |
80 | * Returns 0 on success, < 0 otherwise | |
81 | */ | |
82 | int rtnetlink_rcv(struct rtnl_handler *handler, struct rtnlmsg *rtnlmsg); | |
83 | ||
84 | /* | |
85 | * rtnetlink_send : send a route netlink socket, it is up | |
86 | * to the caller to manage the allocation of the route netlink message | |
87 | * | |
88 | * @handler: the handler of the route netlink socket | |
89 | * @rtnlmsg: the pointer to a netlink message pre-allocated | |
90 | * | |
91 | * Returns 0 on success, < 0 otherwise | |
92 | */ | |
93 | int rtnetlink_send(struct rtnl_handler *handler, struct rtnlmsg *rtnlmsg); | |
94 | ||
95 | struct genlmsg *genlmsg_alloc(size_t size); | |
96 | ||
97 | void rtnlmsg_free(struct rtnlmsg *rtnlmsg); | |
98 | ||
99 | /* | |
100 | * rtnetlink_transaction : send and receive a route netlink message in one shot | |
101 | * | |
102 | * @handler: the handler of the route netlink socket | |
103 | * @request: a route netlink message containing the request to be sent | |
104 | * @answer: a pre-allocated route netlink message to receive the response | |
105 | * | |
106 | * Returns 0 on success, < 0 otherwise | |
107 | */ | |
f79d43bb | 108 | int rtnetlink_transaction(struct rtnl_handler *handler, |
0ad19a3f | 109 | struct rtnlmsg *request, struct rtnlmsg *answer); |
110 | #endif |