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