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quagga 1.0.20160315

    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: 
   27: #ifdef HAVE_IRDP
   28: #include "zebra/irdp.h"
   29: #endif
   30: 
   31: /* For interface multicast configuration. */
   32: #define IF_ZEBRA_MULTICAST_UNSPEC 0
   33: #define IF_ZEBRA_MULTICAST_ON     1
   34: #define IF_ZEBRA_MULTICAST_OFF    2
   35: 
   36: /* For interface shutdown configuration. */
   37: #define IF_ZEBRA_SHUTDOWN_OFF    0
   38: #define IF_ZEBRA_SHUTDOWN_ON     1
   39: 
   40: #if defined (HAVE_RTADV)
   41: /* Router advertisement parameter.  From RFC4861, RFC6275 and RFC4191. */
   42: struct rtadvconf
   43: {
   44:   /* A flag indicating whether or not the router sends periodic Router
   45:      Advertisements and responds to Router Solicitations.
   46:      Default: FALSE */
   47:   int AdvSendAdvertisements;
   48: 
   49:   /* The maximum time allowed between sending unsolicited multicast
   50:      Router Advertisements from the interface, in milliseconds.
   51:      MUST be no less than 70 ms [RFC6275 7.5] and no greater
   52:      than 1800000 ms [RFC4861 6.2.1].
   53: 
   54:      Default: 600000 milliseconds */
   55:   int MaxRtrAdvInterval;
   56: #define RTADV_MAX_RTR_ADV_INTERVAL 600000
   57: 
   58:   /* The minimum time allowed between sending unsolicited multicast
   59:      Router Advertisements from the interface, in milliseconds.
   60:      MUST be no less than 30 ms [RFC6275 7.5].
   61:      MUST be no greater than .75 * MaxRtrAdvInterval.
   62: 
   63:      Default: 0.33 * MaxRtrAdvInterval */
   64:   int MinRtrAdvInterval; /* This field is currently unused. */
   65: #define RTADV_MIN_RTR_ADV_INTERVAL (0.33 * RTADV_MAX_RTR_ADV_INTERVAL)
   66: 
   67:   /* Unsolicited Router Advertisements' interval timer. */
   68:   int AdvIntervalTimer;
   69: 
   70:   /* The TRUE/FALSE value to be placed in the "Managed address
   71:      configuration" flag field in the Router Advertisement.  See
   72:      [ADDRCONF].
   73:  
   74:      Default: FALSE */
   75:   int AdvManagedFlag;
   76: 
   77: 
   78:   /* The TRUE/FALSE value to be placed in the "Other stateful
   79:      configuration" flag field in the Router Advertisement.  See
   80:      [ADDRCONF].
   81: 
   82:      Default: FALSE */
   83:   int AdvOtherConfigFlag;
   84: 
   85:   /* The value to be placed in MTU options sent by the router.  A
   86:      value of zero indicates that no MTU options are sent.
   87: 
   88:      Default: 0 */
   89:   int AdvLinkMTU;
   90: 
   91: 
   92:   /* The value to be placed in the Reachable Time field in the Router
   93:      Advertisement messages sent by the router.  The value zero means
   94:      unspecified (by this router).  MUST be no greater than 3,600,000
   95:      milliseconds (1 hour).
   96: 
   97:      Default: 0 */
   98:   u_int32_t AdvReachableTime;
   99: #define RTADV_MAX_REACHABLE_TIME 3600000
  100: 
  101: 
  102:   /* The value to be placed in the Retrans Timer field in the Router
  103:      Advertisement messages sent by the router.  The value zero means
  104:      unspecified (by this router).
  105: 
  106:      Default: 0 */
  107:   int AdvRetransTimer;
  108: 
  109:   /* The default value to be placed in the Cur Hop Limit field in the
  110:      Router Advertisement messages sent by the router.  The value
  111:      should be set to that current diameter of the Internet.  The
  112:      value zero means unspecified (by this router).
  113: 
  114:      Default: The value specified in the "Assigned Numbers" RFC
  115:      [ASSIGNED] that was in effect at the time of implementation. */
  116:   int AdvCurHopLimit;
  117: 
  118:   /* The value to be placed in the Router Lifetime field of Router
  119:      Advertisements sent from the interface, in seconds.  MUST be
  120:      either zero or between MaxRtrAdvInterval and 9000 seconds.  A
  121:      value of zero indicates that the router is not to be used as a
  122:      default router.
  123: 
  124:      Default: 3 * MaxRtrAdvInterval */
  125:   int AdvDefaultLifetime;
  126: #define RTADV_MAX_RTRLIFETIME 9000 /* 2.5 hours */
  127: 
  128:   /* A list of prefixes to be placed in Prefix Information options in
  129:      Router Advertisement messages sent from the interface.
  130: 
  131:      Default: all prefixes that the router advertises via routing
  132:      protocols as being on-link for the interface from which the
  133:      advertisement is sent. The link-local prefix SHOULD NOT be
  134:      included in the list of advertised prefixes. */
  135:   struct list *AdvPrefixList;
  136: 
  137:   /* The TRUE/FALSE value to be placed in the "Home agent"
  138:      flag field in the Router Advertisement.  See [RFC6275 7.1].
  139: 
  140:      Default: FALSE */
  141:   int AdvHomeAgentFlag;
  142: #ifndef ND_RA_FLAG_HOME_AGENT
  143: #define ND_RA_FLAG_HOME_AGENT 	0x20
  144: #endif
  145: 
  146:   /* The value to be placed in Home Agent Information option if Home 
  147:      Flag is set.
  148:      Default: 0 */
  149:   int HomeAgentPreference;
  150: 
  151:   /* The value to be placed in Home Agent Information option if Home 
  152:      Flag is set. Lifetime (seconds) MUST not be greater than 18.2 
  153:      hours. 
  154:      The value 0 has special meaning: use of AdvDefaultLifetime value.
  155:      
  156:      Default: 0 */
  157:   int HomeAgentLifetime;
  158: #define RTADV_MAX_HALIFETIME 65520 /* 18.2 hours */
  159: 
  160:   /* The TRUE/FALSE value to insert or not an Advertisement Interval
  161:      option. See [RFC 6275 7.3]
  162: 
  163:      Default: FALSE */
  164:   int AdvIntervalOption;
  165: 
  166:   /* The value to be placed in the Default Router Preference field of
  167:      a router advertisement. See [RFC 4191 2.1 & 2.2]
  168: 
  169:      Default: 0 (medium) */
  170:   int DefaultPreference;
  171: #define RTADV_PREF_MEDIUM 0x0 /* Per RFC4191. */
  172: };
  173: 
  174: #endif /* HAVE_RTADV */
  175: 
  176: /* `zebra' daemon local interface structure. */
  177: struct zebra_if
  178: {
  179:   /* Shutdown configuration. */
  180:   u_char shutdown;
  181: 
  182:   /* Multicast configuration. */
  183:   u_char multicast;
  184: 
  185:   /* Router advertise configuration. */
  186:   u_char rtadv_enable;
  187: 
  188:   /* Installed addresses chains tree. */
  189:   struct route_table *ipv4_subnets;
  190: 
  191: #if defined(HAVE_RTADV)
  192:   struct rtadvconf rtadv;
  193: #endif /* RTADV */
  194: 
  195: #ifdef HAVE_IRDP
  196:   struct irdp_interface irdp;
  197: #endif
  198: 
  199: #ifdef HAVE_STRUCT_SOCKADDR_DL
  200:   union {
  201:     /* note that sdl_storage is never accessed, it only exists to make space.
  202:      * all actual uses refer to sdl - but use sizeof(sdl_storage)!  this fits
  203:      * best with C aliasing rules. */
  204:     struct sockaddr_dl sdl;
  205:     struct sockaddr_storage sdl_storage;
  206:   };
  207: #endif
  208: 
  209: #ifdef SUNOS_5
  210:   /* the real IFF_UP state of the primary interface.
  211:    * need this to differentiate between all interfaces being
  212:    * down (but primary still plumbed) and primary having gone
  213:    * ~IFF_UP, and all addresses gone.
  214:    */
  215:   u_char primary_state;
  216: #endif /* SUNOS_5 */
  217: };
  218: 
  219: extern void if_delete_update (struct interface *ifp);
  220: extern void if_add_update (struct interface *ifp);
  221: extern void if_up (struct interface *);
  222: extern void if_down (struct interface *);
  223: extern void if_refresh (struct interface *);
  224: extern void if_flags_update (struct interface *, uint64_t);
  225: extern int if_subnet_add (struct interface *, struct connected *);
  226: extern int if_subnet_delete (struct interface *, struct connected *);
  227: 
  228: #ifdef HAVE_PROC_NET_DEV
  229: extern void ifstat_update_proc (void);
  230: #endif /* HAVE_PROC_NET_DEV */
  231: #ifdef HAVE_NET_RT_IFLIST
  232: extern void ifstat_update_sysctl (void);
  233: 
  234: #endif /* HAVE_NET_RT_IFLIST */
  235: #ifdef HAVE_PROC_NET_DEV
  236: extern int interface_list_proc (void);
  237: #endif /* HAVE_PROC_NET_DEV */
  238: #ifdef HAVE_PROC_NET_IF_INET6
  239: extern int ifaddr_proc_ipv6 (void);
  240: #endif /* HAVE_PROC_NET_IF_INET6 */
  241: 
  242: #endif /* _ZEBRA_INTERFACE_H */