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
  44 union if_addr {
  45         struct in_addr in;
  46         struct in6_addr in6;
  47 };
  48
  49 struct device_prefix_assignment {
  50         struct list_head head;
  51         int32_t assigned;
  52         uint8_t length;
  53         bool enabled;
  54         char name[];
  55 };
  56
  57 struct device_prefix {
  58         struct vlist_node node;
  59         struct list_head head;
  60         struct list_head assignments;
  61         struct interface *iface;
  62         time_t valid_until;
  63         time_t preferred_until;
  64
  65         struct in6_addr addr;
  66         struct in6_addr excl_addr;
  67
  68         uint8_t length;
  69         uint8_t excl_length;
  70 };
  71
  72 struct device_addr {
  73         struct vlist_node node;
  74         bool enabled;
  75
  76         /* ipv4 only */
  77         uint32_t broadcast;
  78         uint32_t point_to_point;
  79
  80         /* ipv6 only */
  81         time_t valid_until;
  82         time_t preferred_until;
  83
  84         /* must be last */
  85         enum device_addr_flags flags;
  86         unsigned int mask;
  87         union if_addr addr;
  88 };
  89
  90 struct device_route {
  91         struct vlist_node node;
  92         struct interface *iface;
  93
  94         bool enabled;
  95         bool keep;
  96
  97         union if_addr nexthop;
  98         int mtu;
  99         time_t valid_until;
 100
 101         /* must be last */
 102         enum device_addr_flags flags;
 103         int metric; // there can be multiple routes to the same target
 104         unsigned int table;
 105         unsigned int mask;
 106         union if_addr addr;
 107 };
 108
 109 struct dns_server {
 110         struct vlist_simple_node node;
 111         int af;
 112         union if_addr addr;
 113 };
 114
 115 struct dns_search_domain {
 116         struct vlist_simple_node node;
 117         char name[];
 118 };
 119
 120 extern const struct config_param_list route_attr_list;
 121 extern struct list_head prefixes;
 122
 123 void interface_ip_init(struct interface *iface);
 124 void interface_add_dns_server(struct interface_ip_settings *ip, const char *str);
 125 void interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list);
 126 void interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list);
 127 void interface_write_resolv_conf(void);
 128
 129 void interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6);
 130
 131 void interface_ip_update_start(struct interface_ip_settings *ip);
 132 void interface_ip_update_complete(struct interface_ip_settings *ip);
 133 void interface_ip_flush(struct interface_ip_settings *ip);
 134 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled);
 135 void interface_ip_update_metric(struct interface_ip_settings *ip, int metric);
 136
 137 struct interface *interface_ip_add_target_route(union if_addr *addr, bool v6);
 138
 139 struct device_prefix* interface_ip_add_device_prefix(struct interface *iface,
 140                 struct in6_addr *addr, uint8_t length, time_t valid_until, time_t preferred_until,
 141                 struct in6_addr *excl_addr, uint8_t excl_length);
 142 void interface_ip_set_ula_prefix(const char *prefix);
 143 void interface_refresh_assignments(bool hint);
 144
 145 #endif