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 {
  47         struct vlist_node node;
  48         struct list_head head;
  49         struct vlist_tree *assignments;
  50         struct interface *iface;
  51         uint64_t avail;
  52         time_t valid_until;
  53         time_t preferred_until;
  54
  55         struct in6_addr addr;
  56         uint8_t length;
  57 };
  58
  59 struct device_prefix_assignment {
  60         struct vlist_node node;
  61         struct device_prefix *prefix;
  62         struct in6_addr addr;
  63         bool enabled;
  64         uint8_t length;
  65         char *name;
  66 };
  67
  68 struct device_addr {
  69         struct vlist_node node;
  70         bool enabled;
  71
  72         /* ipv4 only */
  73         uint32_t broadcast;
  74         uint32_t point_to_point;
  75
  76         /* ipv6 only */
  77         time_t valid_until;
  78         time_t preferred_until;
  79
  80         /* must be last */
  81         enum device_addr_flags flags;
  82         unsigned int mask;
  83         union if_addr addr;
  84 };
  85
  86 struct device_route {
  87         struct vlist_node node;
  88         struct interface *iface;
  89
  90         bool enabled;
  91         bool keep;
  92
  93         union if_addr nexthop;
  94         int mtu;
  95         time_t valid_until;
  96
  97         /* must be last */
  98         enum device_addr_flags flags;
  99         int metric; // there can be multiple routes to the same target
 100         unsigned int mask;
 101         union if_addr addr;
 102 };
 103
 104 struct dns_server {
 105         struct vlist_simple_node node;
 106         int af;
 107         union if_addr addr;
 108 };
 109
 110 struct dns_search_domain {
 111         struct vlist_simple_node node;
 112         char name[];
 113 };
 114
 115 extern const struct config_param_list route_attr_list;
 116 extern struct list_head prefixes;
 117
 118 void interface_ip_init(struct interface *iface);
 119 void interface_add_dns_server(struct interface_ip_settings *ip, const char *str);
 120 void interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list);
 121 void interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list);
 122 void interface_write_resolv_conf(void);
 123
 124 void interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6);
 125
 126 void interface_ip_update_start(struct interface_ip_settings *ip);
 127 void interface_ip_update_complete(struct interface_ip_settings *ip);
 128 void interface_ip_flush(struct interface_ip_settings *ip);
 129 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled);
 130 void interface_ip_update_metric(struct interface_ip_settings *ip, int metric);
 131
 132 struct interface *interface_ip_add_target_route(union if_addr *addr, bool v6);
 133
 134 void interface_ip_set_prefix_assignment(struct device_prefix *prefix,
 135                 struct interface *iface, uint8_t length);
 136 struct device_prefix* interface_ip_add_device_prefix(struct interface *iface,
 137                 struct in6_addr *addr, uint8_t length, time_t valid_until, time_t preferred_until);
 138 void interface_ip_set_ula_prefix(const char *prefix);
 139
 140 #endif