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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 | |
250b1eec | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
0ad19a3f | 22 | */ |
736da9d0 | 23 | |
f1a4a029 ÇO |
24 | #ifndef __LXC_RTNL_H |
25 | #define __LXC_RTNL_H | |
0ad19a3f | 26 | |
27 | /* | |
28 | * Use this as a good size to allocate route netlink messages | |
29 | */ | |
30 | #define RTNLMSG_GOOD_SIZE NLMSG_GOOD_SIZE | |
31 | #define RTNLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + RTNL_HDRLEN)) | |
32 | ||
33 | /* | |
f79d43bb | 34 | * struct genl_handler : the structure which store the netlink handler |
0ad19a3f | 35 | * and the family number |
36 | * | |
37 | * @nlh: the netlink socket handler | |
38 | */ | |
736da9d0 | 39 | struct rtnl_handler { |
0ad19a3f | 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 | */ | |
736da9d0 | 62 | extern int rtnetlink_open(struct rtnl_handler *handler); |
0ad19a3f | 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 | */ | |
736da9d0 | 71 | extern int rtnetlink_close(struct rtnl_handler *handler); |
0ad19a3f | 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 | */ | |
736da9d0 | 82 | extern int rtnetlink_rcv(struct rtnl_handler *handler, struct rtnlmsg *rtnlmsg); |
0ad19a3f | 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 | */ | |
736da9d0 CB |
93 | extern int rtnetlink_send(struct rtnl_handler *handler, |
94 | struct rtnlmsg *rtnlmsg); | |
0ad19a3f | 95 | |
96 | struct genlmsg *genlmsg_alloc(size_t size); | |
97 | ||
736da9d0 | 98 | extern void rtnlmsg_free(struct rtnlmsg *rtnlmsg); |
0ad19a3f | 99 | |
100 | /* | |
101 | * rtnetlink_transaction : send and receive a route netlink message in one shot | |
102 | * | |
103 | * @handler: the handler of the route netlink socket | |
104 | * @request: a route netlink message containing the request to be sent | |
105 | * @answer: a pre-allocated route netlink message to receive the response | |
106 | * | |
107 | * Returns 0 on success, < 0 otherwise | |
108 | */ | |
736da9d0 CB |
109 | extern int rtnetlink_transaction(struct rtnl_handler *handler, |
110 | struct rtnlmsg *request, | |
111 | struct rtnlmsg *answer); | |
112 | ||
113 | #endif /* __LXC_RTNL_H */ |