kernel-netlink: Support extended table IDs for custom routes
[strongswan.git] / src / libcharon / plugins / kernel_netlink / kernel_netlink_plugin.c
1 /*
2 * Copyright (C) 2008 Tobias Brunner
3 * HSR Hochschule fuer Technik Rapperswil
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 */
15
16
17 #include "kernel_netlink_plugin.h"
18
19 #include "kernel_netlink_ipsec.h"
20 #include "kernel_netlink_net.h"
21
22 #include <sa/task_manager.h>
23
24 typedef struct private_kernel_netlink_plugin_t private_kernel_netlink_plugin_t;
25
26 /**
27 * private data of kernel netlink plugin
28 */
29 struct private_kernel_netlink_plugin_t {
30 /**
31 * implements plugin interface
32 */
33 kernel_netlink_plugin_t public;
34 };
35
36 METHOD(plugin_t, get_name, char*,
37 private_kernel_netlink_plugin_t *this)
38 {
39 return "kernel-netlink";
40 }
41
42 METHOD(plugin_t, get_features, int,
43 private_kernel_netlink_plugin_t *this, plugin_feature_t *features[])
44 {
45 static plugin_feature_t f[] = {
46 PLUGIN_CALLBACK(kernel_ipsec_register, kernel_netlink_ipsec_create),
47 PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"),
48 PLUGIN_CALLBACK(kernel_net_register, kernel_netlink_net_create),
49 PLUGIN_PROVIDE(CUSTOM, "kernel-net"),
50 };
51 *features = f;
52 return countof(f);
53 }
54
55 METHOD(plugin_t, reload, bool,
56 private_kernel_netlink_plugin_t *this)
57 {
58 u_int timeout;
59 FILE *f;
60
61 f = fopen("/proc/sys/net/core/xfrm_acq_expires", "w");
62 if (f)
63 {
64 timeout = lib->settings->get_int(lib->settings,
65 "%s.plugins.kernel-netlink.xfrm_acq_expires",
66 task_manager_total_retransmit_timeout(), lib->ns);
67 fprintf(f, "%u", timeout);
68 fclose(f);
69 }
70 return TRUE;
71 }
72
73 METHOD(plugin_t, destroy, void,
74 private_kernel_netlink_plugin_t *this)
75 {
76 free(this);
77 }
78
79 /*
80 * see header file
81 */
82 plugin_t *kernel_netlink_plugin_create()
83 {
84 private_kernel_netlink_plugin_t *this;
85
86 if (!lib->caps->keep(lib->caps, CAP_NET_ADMIN))
87 { /* required to bind/use XFRM sockets / create/modify routing tables, but
88 * not if only the read-only parts of kernel-netlink-net are used, so
89 * we don't fail here */
90 DBG1(DBG_KNL, "kernel-netlink plugin might require CAP_NET_ADMIN "
91 "capability");
92 }
93
94 INIT(this,
95 .public = {
96 .plugin = {
97 .get_name = _get_name,
98 .get_features = _get_features,
99 .reload = _reload,
100 .destroy = _destroy,
101 },
102 },
103 );
104
105 reload(this);
106
107 return &this->public.plugin;
108 }