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Diffstat (limited to 'eigrpd/eigrp_const.h')
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diff --git a/eigrpd/eigrp_const.h b/eigrpd/eigrp_const.h new file mode 100644 index 0000000..149cf00 --- /dev/null +++ b/eigrpd/eigrp_const.h @@ -0,0 +1,454 @@ +/* + * EIGRP Definition of Constants. + * Copyright (C) 2013-2016 + * Authors: + * Donnie Savage + * Jan Janovic + * Matej Perina + * Peter Orsag + * Peter Paluch + * Frantisek Gazo + * Tomas Hvorkovy + * Martin Kontsek + * Lukas Koribsky + * + * This file is part of GNU Zebra. + * + * GNU Zebra is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * GNU Zebra is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _ZEBRA_EIGRP_CONST_H_ +#define _ZEBRA_EIGRP_CONST_H_ + +#define EIGRP_NEIGHBOR_DOWN 0 +#define EIGRP_NEIGHBOR_PENDING 1 +#define EIGRP_NEIGHBOR_UP 2 +#define EIGRP_NEIGHBOR_STATE_MAX 3 + +/*Packet requiring ack will be retransmitted again after this time*/ +#define EIGRP_PACKET_RETRANS_TIME 2 /* in seconds */ +#define EIGRP_PACKET_RETRANS_MAX 16 /* number of retrans attempts */ +#define PLAINTEXT_LENGTH 81 + +/*Metric variance multiplier*/ +#define EIGRP_VARIANCE_DEFAULT 1 +#define EIGRP_MAX_PATHS_DEFAULT 4 + +/* Return values of functions involved in packet verification */ +#define MSG_OK 0 +#define MSG_NG 1 + +#define EIGRP_HEADER_VERSION 2 + +/* Default protocol, port number. */ +#ifndef IPPROTO_EIGRPIGP +#define IPPROTO_EIGRPIGP 88 +#endif /* IPPROTO_EIGRPIGP */ + +#define EIGRP_AUTH_MD5_TLV_SIZE 40 +#define EIGRP_AUTH_SHA256_TLV_SIZE 56 + +/*Cisco routers use only first 44 bytes of basic hello for their MD5 + * calculations*/ +#define EIGRP_MD5_BASIC_COMPUTE 44 +#define EIGRP_MD5_UPDATE_INIT_COMPUTE 40 + +#define EIGRP_AUTH_BASIC_HELLO_FLAG 0x01 +#define EIGRP_AUTH_TID_HELLO_FLAG 0x02 +#define EIGRP_AUTH_UPDATE_INIT_FLAG 0x04 +#define EIGRP_AUTH_UPDATE_FLAG 0x08 +#define EIGRP_AUTH_EXTRA_SALT_FLAG 0x10 + +#define EIGRP_NEXT_SEQUENCE_TLV_SIZE 8 + +/* IP TTL for EIGRP protocol. */ +#define EIGRP_IP_TTL 1 + +/* VTY port number. */ +#define EIGRP_VTY_PORT 2613 + +/* Default configuration file name for eigrp. */ +#define EIGRP_DEFAULT_CONFIG "eigrpd.conf" + +#define EIGRP_HELLO_INTERVAL_DEFAULT 5 +#define EIGRP_HOLD_INTERVAL_DEFAULT 15 +#define EIGRP_BANDWIDTH_DEFAULT 100000 +#define EIGRP_DELAY_DEFAULT 10 +#define EIGRP_RELIABILITY_DEFAULT 255 +#define EIGRP_LOAD_DEFAULT 1 + +#define EIGRP_MULTICAST_ADDRESS 0xe000000A /*224.0.0.10*/ + +#define EIGRP_MAX_METRIC 0xffffffffU /*4294967295*/ +enum metric_change { METRIC_DECREASE, METRIC_SAME, METRIC_INCREASE }; + +#define DEFAULT_ROUTE ZEBRA_ROUTE_MAX +#define DEFAULT_ROUTE_TYPE(T) ((T) == DEFAULT_ROUTE) + +#define INTERFACE_DOWN_BY_ZEBRA 1 +#define INTERFACE_DOWN_BY_VTY 2 +#define INTERFACE_DOWN_BY_FINAL 3 + +#define EIGRP_HELLO_NORMAL 0x00 +#define EIGRP_HELLO_GRACEFUL_SHUTDOWN 0x01 +#define EIGRP_HELLO_ADD_SEQUENCE 0x02 +#define EIGRP_HELLO_GRACEFUL_SHUTDOWN_NBR 0x04 + +/* EIGRP Network Type. */ +#define EIGRP_IFTYPE_NONE 0 +#define EIGRP_IFTYPE_POINTOPOINT 1 +#define EIGRP_IFTYPE_BROADCAST 2 +#define EIGRP_IFTYPE_LOOPBACK 3 +#define EIGRP_IFTYPE_MAX 4 + +#define EIGRP_IF_ACTIVE 0 +#define EIGRP_IF_PASSIVE 1 + +/* EIGRP TT destination type */ +#define EIGRP_TOPOLOGY_TYPE_CONNECTED 0 // Connected network +#define EIGRP_TOPOLOGY_TYPE_REMOTE 1 // Remote internal network +#define EIGRP_TOPOLOGY_TYPE_REMOTE_EXTERNAL 2 // Remote external network + +/*EIGRP TT entry flags*/ +#define EIGRP_ROUTE_DESCRIPTOR_SUCCESSOR_FLAG (1 << 0) +#define EIGRP_ROUTE_DESCRIPTOR_FSUCCESSOR_FLAG (1 << 1) +#define EIGRP_ROUTE_DESCRIPTOR_INTABLE_FLAG (1 << 2) +#define EIGRP_ROUTE_DESCRIPTOR_EXTERNAL_FLAG (1 << 3) + +/*EIGRP FSM state count, event count*/ +#define EIGRP_FSM_STATE_MAX 5 +#define EIGRP_FSM_EVENT_MAX 16 + +/*EEGRP FSM states*/ +enum eigrp_fsm_states { + EIGRP_FSM_STATE_PASSIVE, + EIGRP_FSM_STATE_ACTIVE_0, + EIGRP_FSM_STATE_ACTIVE_1, + EIGRP_FSM_STATE_ACTIVE_2, + EIGRP_FSM_STATE_ACTIVE_3, +}; + +/*EIGRP FSM events return values*/ +#define EIGRP_FSM_NEED_UPDATE 1 +#define EIGRP_FSM_NEED_QUERY 2 + +/*EIGRP FSM events*/ +enum eigrp_fsm_events { + /* + * Input event other than query from succ, + * FC is not satisfied + */ + EIGRP_FSM_EVENT_NQ_FCN, + + /* last reply, FD is reset */ + EIGRP_FSM_EVENT_LR, + + /* Query from succ, FC not satisfied */ + EIGRP_FSM_EVENT_Q_FCN, + + /* last reply, FC satisifed with current value of FDij */ + EIGRP_FSM_EVENT_LR_FCS, + + /* distance increase while in a active state */ + EIGRP_FSM_EVENT_DINC, + + /* Query from succ while in active state */ + EIGRP_FSM_EVENT_QACT, + + /* last reply, FC not satisfied */ + EIGRP_FSM_EVENT_LR_FCN, + + /* + * state not changed + * usually by receiving not last reply + */ + EIGRP_FSM_KEEP_STATE, +}; + +/** + * External routes originate from some other protocol - these are them + */ +#define NULL_PROTID 0 /*!< unknown protocol */ +#define IGRP_PROTID 1 /*!< IGRP.. whos your daddy! */ +#define EIGRP_PROTID 2 /*!< EIGRP - Just flat out the best */ +#define STATIC_PROTID 3 /*!< Staticly configured source */ +#define RIP_PROTID 4 /*!< Routing Information Protocol */ +#define HELLO_PROTID 5 /*!< Hello? RFC-891 you there? */ +#define OSPF_PROTID 6 /*!< OSPF - Open Shortest Path First */ +#define ISIS_PROTID 7 /*!< Intermediate System To Intermediate System */ +#define EGP_PROTID 8 /*!< Exterior Gateway Protocol */ +#define BGP_PROTID 9 /*!< Border Gateway Protocol */ +#define IDRP_PROTID 10 /*!< InterDomain Routing Protocol */ +#define CONN_PROTID 11 /*!< Connected source */ + +/* + * metric k-value defaults + */ +#define EIGRP_K1_DEFAULT 1 //!< unweighed inverse bandwidth +#define EIGRP_K2_DEFAULT 0 //!< no loading term +#define EIGRP_K3_DEFAULT 1 //!< unweighted delay +#define EIGRP_K4_DEFAULT 0 //!< no reliability term +#define EIGRP_K5_DEFAULT 0 //!< no reliability term +#define EIGRP_K6_DEFAULT 0 //!< do not add in extended metrics + +/* + * EIGRP Fixed header + */ +#define EIGRP_HEADER_LEN 20U +#define EIGRP_PACKET_MAX_LEN 65535U /* includes IP Header size. */ + +#define EIGRP_TLV_HDR_LENGTH 4 + +/** + * EIGRP Packet Opcodes + */ +#define EIGRP_OPC_UPDATE 1 /*!< packet containing routing information */ +#define EIGRP_OPC_REQUEST 2 /*!< sent to request one or more routes */ +#define EIGRP_OPC_QUERY 3 /*!< sent when a routing is in active start */ +#define EIGRP_OPC_REPLY 4 /*!< sent in response to a query */ +#define EIGRP_OPC_HELLO 5 /*!< sent to maintain a peering session */ +#define EIGRP_OPC_IPXSAP 6 /*!< IPX SAP information */ +#define EIGRP_OPC_PROBE 7 /*!< for test purposes */ +#define EIGRP_OPC_ACK 8 /*!< acknowledge */ +#define EIGRP_OPC_SIAQUERY 10 /*!< QUERY - with relaxed restrictions */ +#define EIGRP_OPC_SIAREPLY 11 /*!< REPLY - may contain old routing information */ + +/** + * EIGRP TLV Range definitions + * PDM TLV Range + * General 0x0000 + * IPv4 0x0100 ** TLVs for one and all + * ATALK 0x0200 ** legacy + * IPX 0x0300 ** discontinued + * IPv6 0x0400 ** legacy + * Multiprotocol 0x0600 ** wide metrics + * MultiTopology 0x00f0 ** deprecated + */ +#define EIGRP_TLV_RANGEMASK 0xfff0 /*!< should be 0xff00 - opps */ +#define EIGRP_TLV_GENERAL 0x0000 + +/** + * 1.2 TLV Definitions ** legacy + * These are considered legacyu and are only used for backward compability with + * older Cisco Routers. They should not be your first choice for packet codings + */ +#define EIGRP_TLV_IPv4 0x0100 /*!< Classic IPv4 TLV encoding */ +#define EIGRP_TLV_ATALK 0x0200 /*!< Classic Appletalk TLV encoding*/ +#define EIGRP_TLV_IPX 0x0300 /*!< Classic IPX TLV encoding */ +#define EIGRP_TLV_IPv6 0x0400 /*!< Classic IPv6 TLV encoding */ + +/** + * 2.0 Multi-Protocol TLV Definitions + * These are the current packet formats and should be used for packets + */ +#define EIGRP_TLV_MP 0x0600 /*!< Non-PDM specific encoding */ + +/** + * TLV type definitions. Generic (protocol-independent) TLV types are + * defined here. Protocol-specific ones are defined elsewhere. + */ +#define EIGRP_TLV_PARAMETER (EIGRP_TLV_GENERAL | 0x0001) /*!< eigrp parameters */ +#define EIGRP_TLV_PARAMETER_LEN (12U) +#define EIGRP_TLV_AUTH (EIGRP_TLV_GENERAL | 0x0002) /*!< authentication */ +#define EIGRP_TLV_SEQ (EIGRP_TLV_GENERAL | 0x0003) /*!< sequenced packet */ +#define EIGRP_TLV_SEQ_BASE_LEN (5U) +#define EIGRP_TLV_SW_VERSION (EIGRP_TLV_GENERAL | 0x0004) /*!< software version */ +#define EIGRP_TLV_SW_VERSION_LEN (8U) +#define EIGRP_TLV_NEXT_MCAST_SEQ (EIGRP_TLV_GENERAL | 0x0005) /*!< sequence number */ +#define EIGRP_TLV_PEER_TERMINATION (EIGRP_TLV_GENERAL | 0x0007) /*!< peer termination */ +#define EIGRP_TLV_PEER_TERMINATION_LEN (9U) +#define EIGRP_TLV_PEER_TIDLIST (EIGRP_TLV_GENERAL | 0x0008) /*!< peer sub-topology list */ + +/* Older cisco routers send TIDLIST value wrong, adding for backwards + * compatabily */ +#define EIGRP_TLV_PEER_MTRLIST (EIGRP_TLV_GENERAL | 0x00f5) + +/** + * Route Based TLVs + */ +#define EIGRP_TLV_REQUEST 0x0001 +#define EIGRP_TLV_INTERNAL 0x0002 +#define EIGRP_TLV_EXTERNAL 0x0003 +#define EIGRP_TLV_COMMUNITY 0x0004 +#define EIGRP_TLV_TYPEMASK 0x000f + +#define EIGRP_TLV_IPv4_REQ (EIGRP_TLV_IPv4 | EIGRP_TLV_REQUEST) +#define EIGRP_TLV_IPv4_INT (EIGRP_TLV_IPv4 | EIGRP_TLV_INTERNAL) +#define EIGRP_TLV_IPv4_EXT (EIGRP_TLV_IPv4 | EIGRP_TLV_EXTERNAL) +#define EIGRP_TLV_IPv4_COM (EIGRP_TLV_IPv4 | EIGRP_TLV_COMMUNITY) + +#define EIGRP_TLV_IPV4_SIZE_GRT_24_BIT 0x001D +#define EIGRP_TLV_IPV4_SIZE_GRT_16_BIT 0x001C +#define EIGRP_TLV_IPV4_SIZE_GRT_8_BIT 0x001B +#define EIGRP_TLV_IPV4_SIZE_GRT_0_BIT 0x001A +#define EIGRP_TLV_MAX_IPV4_BYTE EIGRP_TLV_IPV4_SIZE_GRT_24_BIT + +/* max number of TLV IPv4 prefixes in packet */ +#define EIGRP_TLV_MAX_IPv4 25 + +/** + * + * extdata flag field definitions + */ +#define EIGRP_OPAQUE_EXT 0x01 /*!< Route is external */ +#define EIGRP_OPAQUE_CD 0x02 /*!< Candidate default route */ + +/** + * Address-Family types are taken from: + * http://www.iana.org/assignments/address-family-numbers + * to provide a standards based exchange of AFI information between + * EIGRP routers. + */ +#define EIGRP_AF_IPv4 1 /*!< IPv4 (IP version 4) */ +#define EIGRP_AF_IPv6 2 /*!< IPv6 (IP version 6) */ +#define EIGRP_AF_IPX 11 /*!< IPX */ +#define EIGRP_AF_ATALK 12 /*!< Appletalk */ +#define EIGRP_SF_COMMON 16384 /*!< Cisco Service Family */ +#define EIGRP_SF_IPv4 16385 /*!< Cisco IPv4 Service Family */ +#define EIGRP_SF_IPv6 16386 /*!< Cisco IPv6 Service Family */ + +/** + * Authentication types supported by EIGRP + */ +#define EIGRP_AUTH_TYPE_NONE 0 +#define EIGRP_AUTH_TYPE_TEXT 1 +#define EIGRP_AUTH_TYPE_MD5 2 +#define EIGRP_AUTH_TYPE_MD5_LEN 16 +#define EIGRP_AUTH_TYPE_SHA256 3 +#define EIGRP_AUTH_TYPE_SHA256_LEN 32 + +/** + * opaque flag field definitions + */ +#define EIGRP_OPAQUE_SRCWD 0x01 /*!< Route Source Withdraw */ +#define EIGRP_OPAQUE_ACTIVE 0x04 /*!< Route is currently in active state */ +#define EIGRP_OPAQUE_REPL 0x08 /*!< Route is replicated from different tableid */ + +/** + * pak flag bit field definitions - 0 (none)-7 source priority + */ +#define EIGRP_PRIV_DEFAULT 0x00 /* 0 (none)-7 source priority */ +#define EIGRP_PRIV_LOW 0x01 +#define EIGRP_PRIV_MEDIUM 0x04 +#define EIGRP_PRIV_HIGH 0x07 + +/* + * Init bit definition. First unicast transmitted Update has this + * bit set in the flags field of the fixed header. It tells the neighbor + * to down-load his topology table. + */ +#define EIGRP_INIT_FLAG 0x01 + +/* + * CR bit (Conditionally Received) definition in flags field on header. Any + * packets with the CR-bit set can be accepted by an EIGRP speaker if and + * only if a previous Hello was received with the SEQUENCE_TYPE TLV present. + * + * This allows multicasts to be transmitted in order and reliably at the + * same time as unicasts are transmitted. + */ +#define EIGRP_CR_FLAG 0x02 + +/* + * RS bit. The Restart flag is set in the hello and the init + * update packets during the nsf signaling period. A nsf-aware + * router looks at the RS flag to detect if a peer is restarting + * and maintain the adjacency. A restarting router looks at + * this flag to determine if the peer is helping out with the restart. + */ +#define EIGRP_RS_FLAG 0x04 + +/* + * EOT bit. The End-of-Table flag marks the end of the start-up updates + * sent to a new peer. A nsf restarting router looks at this flag to + * determine if it has finished receiving the start-up updates from all + * peers. A nsf-aware router waits for this flag before cleaning up + * the stale routes from the restarting peer. + */ +#define EIGRP_EOT_FLAG 0x08 + +/** + * EIGRP Virtual Router ID + * + * Define values to deal with EIGRP virtual router ids. Virtual + * router IDs are stored in the upper short of the EIGRP fixed packet + * header. The lower short of the packet header continues to be used + * as asystem number. + * + * Virtual Router IDs are PDM-independent. All PDMs will use + * VRID_BASE to indicate the 'base' or 'legacy' EIGRP instance. + * All PDMs need to initialize their vrid to VRID_BASE for compatibility + * with legacy routers. + * Once IPv6 supports 'MTR Multicast', it will use the same VRID as + * IPv4. No current plans to support VRIDs on IPX. :) + * Initial usage of VRID is to signal usage of Multicast topology for + * MTR. + * + * VRID_MCAST is a well known constant, other VRIDs will be determined + * programmatic... + * + * With the addition of SAF the VRID space has been divided into two + * segments 0x0000-0x7fff is for EIGRP and vNets, 0x8000-0xffff is + * for saf and its associated vNets. + */ +#define EIGRP_VRID_MASK 0x8001 +#define EIGRP_VRID_AF_BASE 0x0000 +#define EIGRP_VRID_MCAST_BASE 0x0001 +#define EIGRP_VRID_SF_BASE 0x8000 + +/* Extended Attributes for a destination */ +#define EIGRP_ATTR_HDRLEN (2) +#define EIGRP_ATTR_MAXDATA (512) + +#define EIGRP_ATTR_NOOP 0 /*!< No-Op used as offset padding */ +#define EIGRP_ATTR_SCALED 1 /*!< Scaled metric values */ +#define EIGRP_ATTR_TAG 2 /*!< Tag assigned by Admin for dest */ +#define EIGRP_ATTR_COMM 3 /*!< Community attribute for dest */ +#define EIGRP_ATTR_JITTER 4 /*!< Variation in path delay */ +#define EIGRP_ATTR_QENERGY 5 /*!< Non-Active energy usage along path */ +#define EIGRP_ATTR_ENERGY 6 /*!< Active energy usage along path */ + +/* + * Begin EIGRP-BGP interoperability communities + */ +#define EIGRP_EXTCOMM_SOO_ASFMT 0x0003 /* Site-of-Origin, BGP AS format */ +#define EIGRP_EXTCOMM_SOO_ADRFMT 0x0103 /* Site-of-Origin, BGP/EIGRP addr format */ + +/* + * EIGRP Specific communities + */ +#define EIGRP_EXTCOMM_EIGRP 0x8800 /* EIGRP route information appended*/ +#define EIGRP_EXTCOMM_DAD 0x8801 /* EIGRP AS + Delay */ +#define EIGRP_EXTCOMM_VRHB 0x8802 /* EIGRP Vector: Reliability + Hop + BW */ +#define EIGRP_EXTCOMM_SRLM 0x8803 /* EIGRP System: Reserve +Load + MTU */ +#define EIGRP_EXTCOMM_SAR 0x8804 /* EIGRP System: Remote AS + Remote ID */ +#define EIGRP_EXTCOMM_RPM 0x8805 /* EIGRP Remote: Protocol + Metric */ +#define EIGRP_EXTCOMM_VRR 0x8806 /* EIGRP Vecmet: Rsvd + (internal) Routerid */ + +/* + * EIGRP Filter constants + */ +#define EIGRP_FILTER_IN 0 +#define EIGRP_FILTER_OUT 1 +#define EIGRP_FILTER_MAX 2 + +/* + * EIGRP Filter constants + */ +#define EIGRP_HSROLE_DEFAULT EIGRP_HSROLE_SPOKE +#define EIGRP_HSROLE_HUB 0x01 +#define EIGRP_HSROLE_SPOKE 0x02 + +#endif /* _ZEBRA_EIGRP_CONST_H_ */ |