IPv6: Set loopback-policy for output traffic
[project/netifd.git] / interface-ip.h
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14 #ifndef __INTERFACE_IP_H
15 #define __INTERFACE_IP_H
16
17 #include "interface.h"
18
19 enum device_addr_flags {
20 /* address family for routes and addresses */
21 DEVADDR_INET4 = (0 << 0),
22 DEVADDR_INET6 = (1 << 0),
23 DEVADDR_FAMILY = DEVADDR_INET4 | DEVADDR_INET6,
24
25 /* externally added address */
26 DEVADDR_EXTERNAL = (1 << 2),
27
28 /* route overrides the default interface metric */
29 DEVROUTE_METRIC = (1 << 3),
30
31 /* route overrides the default interface mtu */
32 DEVROUTE_MTU = (1 << 4),
33
34 /* route automatically added by kernel */
35 DEVADDR_KERNEL = (1 << 5),
36
37 /* address is off-link (no subnet-route) */
38 DEVADDR_OFFLINK = (1 << 6),
39
40 /* route resides in different table */
41 DEVROUTE_TABLE = (1 << 7),
42
43 /* route resides in default source-route table */
44 DEVROUTE_SRCTABLE = (1 << 8),
45 };
46
47 union if_addr {
48 struct in_addr in;
49 struct in6_addr in6;
50 };
51
52 struct device_prefix_assignment {
53 struct list_head head;
54 int32_t assigned;
55 uint8_t length;
56 bool enabled;
57 char name[];
58 };
59
60 struct device_prefix {
61 struct vlist_node node;
62 struct list_head head;
63 struct list_head assignments;
64 struct interface *iface;
65 time_t valid_until;
66 time_t preferred_until;
67
68 struct in6_addr addr;
69 struct in6_addr excl_addr;
70
71 uint8_t length;
72 uint8_t excl_length;
73 };
74
75 struct device_addr {
76 struct vlist_node node;
77 bool enabled;
78
79 /* ipv4 only */
80 uint32_t broadcast;
81 uint32_t point_to_point;
82
83 /* ipv6 only */
84 time_t valid_until;
85 time_t preferred_until;
86
87 /* must be last */
88 enum device_addr_flags flags;
89 unsigned int mask;
90 union if_addr addr;
91 };
92
93 struct device_route {
94 struct vlist_node node;
95 struct interface *iface;
96
97 bool enabled;
98 bool keep;
99
100 union if_addr nexthop;
101 int mtu;
102 time_t valid_until;
103
104 /* must be last */
105 enum device_addr_flags flags;
106 int metric; // there can be multiple routes to the same target
107 unsigned int table;
108 unsigned int mask;
109 union if_addr addr;
110 };
111
112 struct dns_server {
113 struct vlist_simple_node node;
114 int af;
115 union if_addr addr;
116 };
117
118 struct dns_search_domain {
119 struct vlist_simple_node node;
120 char name[];
121 };
122
123 extern const struct config_param_list route_attr_list;
124 extern struct list_head prefixes;
125
126 void interface_ip_init(struct interface *iface);
127 void interface_add_dns_server(struct interface_ip_settings *ip, const char *str);
128 void interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list);
129 void interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list);
130 void interface_write_resolv_conf(void);
131
132 void interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6);
133
134 void interface_ip_update_start(struct interface_ip_settings *ip);
135 void interface_ip_update_complete(struct interface_ip_settings *ip);
136 void interface_ip_flush(struct interface_ip_settings *ip);
137 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled);
138 void interface_ip_update_metric(struct interface_ip_settings *ip, int metric);
139
140 struct interface *interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface);
141
142 struct device_prefix* interface_ip_add_device_prefix(struct interface *iface,
143 struct in6_addr *addr, uint8_t length, time_t valid_until, time_t preferred_until,
144 struct in6_addr *excl_addr, uint8_t excl_length);
145 void interface_ip_set_ula_prefix(const char *prefix);
146 void interface_refresh_assignments(bool hint);
147 int interface_ip_resolve_v6_rtable(int ifindex);
148
149 #endif