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         /* route is on-link */
  47         DEVROUTE_ONLINK         = (1 << 9),
  48
  49         /* route overrides the default route type */
  50         DEVROUTE_TYPE           = (1 << 10),
  51 };
  52
  53 union if_addr {
  54         struct in_addr in;
  55         struct in6_addr in6;
  56 };
  57
  58 struct device_prefix_assignment {
  59         struct list_head head;
  60         int32_t assigned;
  61         uint8_t length;
  62         struct in6_addr addr;
  63         bool enabled;
  64         char name[];
  65 };
  66
  67 struct device_prefix {
  68         struct vlist_node node;
  69         struct list_head head;
  70         struct list_head assignments;
  71         struct interface *iface;
  72         time_t valid_until;
  73         time_t preferred_until;
  74
  75         struct in6_addr excl_addr;
  76         uint8_t excl_length;
  77
  78         struct in6_addr addr;
  79         uint8_t length;
  80
  81         char pclass[];
  82 };
  83
  84 struct device_addr {
  85         struct vlist_node node;
  86         bool enabled;
  87         bool failed;
  88
  89         /* ipv4 only */
  90         uint32_t broadcast;
  91         uint32_t point_to_point;
  92
  93         /* ipv6 only */
  94         time_t valid_until;
  95         time_t preferred_until;
  96         char *pclass;
  97
  98         /* must be last */
  99         enum device_addr_flags flags;
 100         unsigned int mask;
 101         union if_addr addr;
 102 };
 103
 104 struct device_route {
 105         struct vlist_node node;
 106         struct interface *iface;
 107
 108         bool enabled;
 109         bool keep;
 110         bool failed;
 111
 112         union if_addr nexthop;
 113         int mtu;
 114         unsigned int type;
 115         time_t valid_until;
 116
 117         /* must be last */
 118         enum device_addr_flags flags;
 119         int metric; // there can be multiple routes to the same target
 120         unsigned int table;
 121         unsigned int mask;
 122         unsigned int sourcemask;
 123         union if_addr addr;
 124         union if_addr source;
 125 };
 126
 127 struct device_source_table {
 128         struct list_head head;
 129         uint32_t table;
 130         uint16_t refcount;
 131         uint8_t v6;
 132         uint8_t mask;
 133         union if_addr addr;
 134 };
 135
 136 struct dns_server {
 137         struct vlist_simple_node node;
 138         int af;
 139         union if_addr addr;
 140 };
 141
 142 struct dns_search_domain {
 143         struct vlist_simple_node node;
 144         char name[];
 145 };
 146
 147 extern const struct uci_blob_param_list route_attr_list;
 148 extern struct list_head prefixes;
 149
 150 void interface_ip_init(struct interface *iface);
 151 void interface_add_dns_server(struct interface_ip_settings *ip, const char *str);
 152 void interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list);
 153 void interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list);
 154 void interface_write_resolv_conf(void);
 155
 156 void interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6);
 157
 158 void interface_ip_update_start(struct interface_ip_settings *ip);
 159 void interface_ip_update_complete(struct interface_ip_settings *ip);
 160 void interface_ip_flush(struct interface_ip_settings *ip);
 161 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled);
 162 void interface_ip_update_metric(struct interface_ip_settings *ip, int metric);
 163
 164 struct interface *interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface);
 165
 166 struct device_prefix* interface_ip_add_device_prefix(struct interface *iface,
 167                 struct in6_addr *addr, uint8_t length, time_t valid_until, time_t preferred_until,
 168                 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass);
 169 void interface_ip_set_ula_prefix(const char *prefix);
 170 void interface_refresh_assignments(bool hint);
 171
 172 #endif