1 /* Interface function header. 2 * Copyright (C) 1999 Kunihiro Ishiguro 3 * 4 * This file is part of GNU Zebra. 5 * 6 * GNU Zebra is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2, or (at your option) any 9 * later version. 10 * 11 * GNU Zebra is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with GNU Zebra; see the file COPYING. If not, write to the Free 18 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 19 * 02111-1307, USA. 20 */ 21 22 #ifndef _ZEBRA_INTERFACE_H 23 #define _ZEBRA_INTERFACE_H 24 25 #include "redistribute.h" 26 #include "event_counter.h" 27 28 #ifdef HAVE_IRDP 29 #include "zebra/irdp.h" 30 #endif 31 32 /* For interface multicast configuration. */ 33 #define IF_ZEBRA_MULTICAST_UNSPEC 0 34 #define IF_ZEBRA_MULTICAST_ON 1 35 #define IF_ZEBRA_MULTICAST_OFF 2 36 37 /* For interface shutdown configuration. */ 38 #define IF_ZEBRA_SHUTDOWN_OFF 0 39 #define IF_ZEBRA_SHUTDOWN_ON 1 40 41 /* Global user-configured default for interface link-detect */ 42 typedef enum { 43 IF_LINKDETECT_UNSPEC = 0, 44 IF_LINKDETECT_ON, 45 IF_LINKDETECT_OFF, 46 } zebra_if_linkdetect; 47 48 /* Global defaults for interfaces */ 49 struct zebra_if_defaults { 50 /* Link-detect default configuration */ 51 zebra_if_linkdetect linkdetect; 52 }; 53 54 #if defined (HAVE_RTADV) 55 /* Router advertisement parameter. From RFC4861, RFC6275 and RFC4191. */ 56 struct rtadvconf 57 { 58 /* A flag indicating whether or not the router sends periodic Router 59 Advertisements and responds to Router Solicitations. 60 Default: FALSE */ 61 int AdvSendAdvertisements; 62 63 /* The maximum time allowed between sending unsolicited multicast 64 Router Advertisements from the interface, in milliseconds. 65 MUST be no less than 70 ms [RFC6275 7.5] and no greater 66 than 1800000 ms [RFC4861 6.2.1]. 67 68 Default: 600000 milliseconds */ 69 int MaxRtrAdvInterval; 70 #define RTADV_MAX_RTR_ADV_INTERVAL 600000 71 72 /* The minimum time allowed between sending unsolicited multicast 73 Router Advertisements from the interface, in milliseconds. 74 MUST be no less than 30 ms [RFC6275 7.5]. 75 MUST be no greater than .75 * MaxRtrAdvInterval. 76 77 Default: 0.33 * MaxRtrAdvInterval */ 78 int MinRtrAdvInterval; /* This field is currently unused. */ 79 #define RTADV_MIN_RTR_ADV_INTERVAL (0.33 * RTADV_MAX_RTR_ADV_INTERVAL) 80 81 /* Unsolicited Router Advertisements' interval timer. */ 82 int AdvIntervalTimer; 83 84 /* The TRUE/FALSE value to be placed in the "Managed address 85 configuration" flag field in the Router Advertisement. See 86 [ADDRCONF]. 87 88 Default: FALSE */ 89 int AdvManagedFlag; 90 91 92 /* The TRUE/FALSE value to be placed in the "Other stateful 93 configuration" flag field in the Router Advertisement. See 94 [ADDRCONF]. 95 96 Default: FALSE */ 97 int AdvOtherConfigFlag; 98 99 /* The value to be placed in MTU options sent by the router. A 100 value of zero indicates that no MTU options are sent. 101 102 Default: 0 */ 103 int AdvLinkMTU; 104 105 106 /* The value to be placed in the Reachable Time field in the Router 107 Advertisement messages sent by the router. The value zero means 108 unspecified (by this router). MUST be no greater than 3,600,000 109 milliseconds (1 hour). 110 111 Default: 0 */ 112 u_int32_t AdvReachableTime; 113 #define RTADV_MAX_REACHABLE_TIME 3600000 114 115 116 /* The value to be placed in the Retrans Timer field in the Router 117 Advertisement messages sent by the router. The value zero means 118 unspecified (by this router). 119 120 Default: 0 */ 121 int AdvRetransTimer; 122 123 /* The default value to be placed in the Cur Hop Limit field in the 124 Router Advertisement messages sent by the router. The value 125 should be set to that current diameter of the Internet. The 126 value zero means unspecified (by this router). 127 128 Default: The value specified in the "Assigned Numbers" RFC 129 [ASSIGNED] that was in effect at the time of implementation. */ 130 int AdvCurHopLimit; 131 132 /* The value to be placed in the Router Lifetime field of Router 133 Advertisements sent from the interface, in seconds. MUST be 134 either zero or between MaxRtrAdvInterval and 9000 seconds. A 135 value of zero indicates that the router is not to be used as a 136 default router. 137 138 Default: 3 * MaxRtrAdvInterval */ 139 int AdvDefaultLifetime; 140 #define RTADV_MAX_RTRLIFETIME 9000 /* 2.5 hours */ 141 142 /* A list of prefixes to be placed in Prefix Information options in 143 Router Advertisement messages sent from the interface. 144 145 Default: all prefixes that the router advertises via routing 146 protocols as being on-link for the interface from which the 147 advertisement is sent. The link-local prefix SHOULD NOT be 148 included in the list of advertised prefixes. */ 149 struct list *AdvPrefixList; 150 151 /* The TRUE/FALSE value to be placed in the "Home agent" 152 flag field in the Router Advertisement. See [RFC6275 7.1]. 153 154 Default: FALSE */ 155 int AdvHomeAgentFlag; 156 #ifndef ND_RA_FLAG_HOME_AGENT 157 #define ND_RA_FLAG_HOME_AGENT 0x20 158 #endif 159 160 /* The value to be placed in Home Agent Information option if Home 161 Flag is set. 162 Default: 0 */ 163 int HomeAgentPreference; 164 165 /* The value to be placed in Home Agent Information option if Home 166 Flag is set. Lifetime (seconds) MUST not be greater than 18.2 167 hours. 168 The value 0 has special meaning: use of AdvDefaultLifetime value. 169 170 Default: 0 */ 171 int HomeAgentLifetime; 172 #define RTADV_MAX_HALIFETIME 65520 /* 18.2 hours */ 173 174 /* The TRUE/FALSE value to insert or not an Advertisement Interval 175 option. See [RFC 6275 7.3] 176 177 Default: FALSE */ 178 int AdvIntervalOption; 179 180 /* The value to be placed in the Default Router Preference field of 181 a router advertisement. See [RFC 4191 2.1 & 2.2] 182 183 Default: 0 (medium) */ 184 int DefaultPreference; 185 #define RTADV_PREF_MEDIUM 0x0 /* Per RFC4191. */ 186 }; 187 188 #endif /* HAVE_RTADV */ 189 190 /* `zebra' daemon local interface structure. */ 191 struct zebra_if 192 { 193 /* Shutdown configuration. */ 194 u_char shutdown; 195 196 /* Multicast configuration. */ 197 u_char multicast; 198 199 /* Router advertise configuration. */ 200 u_char rtadv_enable; 201 202 /* Interface specific link-detect configuration state */ 203 zebra_if_linkdetect linkdetect; 204 205 /* Installed addresses chains tree. */ 206 struct route_table *ipv4_subnets; 207 208 /* Information about up/down changes */ 209 struct event_counter up_events; 210 struct event_counter down_events; 211 212 #if defined(HAVE_RTADV) 213 struct rtadvconf rtadv; 214 #endif /* RTADV */ 215 216 #ifdef HAVE_IRDP 217 struct irdp_interface irdp; 218 #endif 219 220 #ifdef HAVE_STRUCT_SOCKADDR_DL 221 union { 222 /* note that sdl_storage is never accessed, it only exists to make space. 223 * all actual uses refer to sdl - but use sizeof(sdl_storage)! this fits 224 * best with C aliasing rules. */ 225 struct sockaddr_dl sdl; 226 struct sockaddr_storage sdl_storage; 227 }; 228 #endif 229 230 #ifdef SUNOS_5 231 /* the real IFF_UP state of the primary interface. 232 * need this to differentiate between all interfaces being 233 * down (but primary still plumbed) and primary having gone 234 * ~IFF_UP, and all addresses gone. 235 */ 236 u_char primary_state; 237 #endif /* SUNOS_5 */ 238 }; 239 240 extern void if_delete_update (struct interface *ifp); 241 extern void if_add_update (struct interface *ifp); 242 extern void if_up (struct interface *); 243 extern void if_down (struct interface *); 244 extern void if_refresh (struct interface *); 245 extern void if_flags_update (struct interface *, uint64_t); 246 extern void if_startup_count_up (void); 247 extern int if_subnet_add (struct interface *, struct connected *); 248 extern int if_subnet_delete (struct interface *, struct connected *); 249 250 #ifdef HAVE_PROC_NET_DEV 251 extern void ifstat_update_proc (void); 252 #endif /* HAVE_PROC_NET_DEV */ 253 #ifdef HAVE_NET_RT_IFLIST 254 extern void ifstat_update_sysctl (void); 255 256 #endif /* HAVE_NET_RT_IFLIST */ 257 #ifdef HAVE_PROC_NET_DEV 258 extern int interface_list_proc (void); 259 #endif /* HAVE_PROC_NET_DEV */ 260 #ifdef HAVE_PROC_NET_IF_INET6 261 extern int ifaddr_proc_ipv6 (void); 262 #endif /* HAVE_PROC_NET_IF_INET6 */ 263 264 #endif /* _ZEBRA_INTERFACE_H */ 265