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
  41 union if_addr {
  42         struct in_addr in;
  43         struct in6_addr in6;
  44 };
  45
  46 struct device_prefix_assignment {
  47         struct list_head head;
  48         int32_t assigned;
  49         uint8_t length;
  50         bool enabled;
  51         char name[];
  52 };
  53
  54 struct device_prefix {
  55         struct vlist_node node;
  56         struct list_head head;
  57         struct list_head assignments;
  58         struct interface *iface;
  59         time_t valid_until;
  60         time_t preferred_until;
  61
  62         struct in6_addr addr;
  63         struct in6_addr excl_addr;
  64
  65         uint8_t length;
  66         uint8_t excl_length;
  67 };
  68
  69 struct device_addr {
  70         struct vlist_node node;
  71         bool enabled;
  72
  73         /* ipv4 only */
  74         uint32_t broadcast;
  75         uint32_t point_to_point;
  76
  77         /* ipv6 only */
  78         time_t valid_until;
  79         time_t preferred_until;
  80
  81         /* must be last */
  82         enum device_addr_flags flags;
  83         unsigned int mask;
  84         union if_addr addr;
  85 };
  86
  87 struct device_route {
  88         struct vlist_node node;
  89         struct interface *iface;
  90
  91         bool enabled;
  92         bool keep;
  93
  94         union if_addr nexthop;
  95         int mtu;
  96         time_t valid_until;
  97
  98         /* must be last */
  99         enum device_addr_flags flags;
 100         int metric; // there can be multiple routes to the same target
 101         unsigned int mask;
 102         union if_addr addr;
 103 };
 104
 105 struct dns_server {
 106         struct vlist_simple_node node;
 107         int af;
 108         union if_addr addr;
 109 };
 110
 111 struct dns_search_domain {
 112         struct vlist_simple_node node;
 113         char name[];
 114 };
 115
 116 extern const struct config_param_list route_attr_list;
 117 extern struct list_head prefixes;
 118
 119 void interface_ip_init(struct interface *iface);
 120 void interface_add_dns_server(struct interface_ip_settings *ip, const char *str);
 121 void interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list);
 122 void interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list);
 123 void interface_write_resolv_conf(void);
 124
 125 void interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6);
 126
 127 void interface_ip_update_start(struct interface_ip_settings *ip);
 128 void interface_ip_update_complete(struct interface_ip_settings *ip);
 129 void interface_ip_flush(struct interface_ip_settings *ip);
 130 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled);
 131 void interface_ip_update_metric(struct interface_ip_settings *ip, int metric);
 132
 133 struct interface *interface_ip_add_target_route(union if_addr *addr, bool v6);
 134
 135 struct device_prefix* interface_ip_add_device_prefix(struct interface *iface,
 136                 struct in6_addr *addr, uint8_t length, time_t valid_until, time_t preferred_until,
 137                 struct in6_addr *excl_addr, uint8_t excl_length);
 138 void interface_ip_set_ula_prefix(const char *prefix);
 139 void interface_refresh_assignments(bool hint);
 140
 141 #endif