/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.protocol.pcep.spi;

/**
 * Possible errors listed in RFC5440, RFC 5455 and stateful draft.
 *
 * @see <a href="http://tools.ietf.org/html/rfc5440#section-9.12">PCEP-ERROR Object(RFC5440)</a>, <a href=
 *      "http://tools.ietf.org/html/draft-ietf-pce-stateful-pce-07#section-8.4" >PCEP-ERROR Object(stateful draft)</a>,
 *      <a href="http://tools.ietf.org/html/rfc5455#section-3.6">Error Codes for CLASSTYPE Object(RFC5455)</a>, <a href=
 *      "http://www.ietf.org/id/draft-crabbe-pce-pce-initiated-lsp-00.txt#section-7.1" >PCEP-Error Object</a>
 */
public enum PCEPErrors {
    /**
     * Reception of an invalid Open message or a non Open message.
     */
    NON_OR_INVALID_OPEN_MSG,
    /**
     * No Open message received before the expiration of the OpenWait timer.
     */
    NO_OPEN_BEFORE_EXP_OPENWAIT,
    /**
     * Unacceptable and non-negotiable session characteristics.
     */
    NON_ACC_NON_NEG_SESSION_CHAR,
    /**
     * Unacceptable but negotiable session characteristics.
     */
    NON_ACC_NEG_SESSION_CHAR,
    /**
     * Reception of a second Open message with still unacceptable session characteristics.
     */
    SECOND_OPEN_MSG,
    /**
     * Reception of a PCErr message proposing unacceptable session characteristics.
     */
    PCERR_NON_ACC_SESSION_CHAR,
    /**
     * No Keepalive or PCErr message received before the expiration of the KeepWait timer.
     */
    NO_MSG_BEFORE_EXP_KEEPWAIT,
    /**
     * Capability not supported.
     */
    CAPABILITY_NOT_SUPPORTED,
    /**
     * PCEP version not supported.
     */
    PCEP_VERSION_NOT_SUPPORTED,
    /**
     * Unrecognized object class.
     */
    UNRECOGNIZED_OBJ_CLASS,
    /**
     * Unrecognized object Type.
     */
    UNRECOGNIZED_OBJ_TYPE,
    /**
     * Not supported object class.
     */
    NOT_SUPPORTED_OBJ_CLASS,
    /**
     * Not supported object Type.
     */
    NOT_SUPPORTED_OBJ_TYPE,
    /**
     * C bit of the METRIC object set (request rejected).
     */
    C_BIT_SET,
    /**
     * O bit of the RP object cleared (request rejected).
     */
    O_BIT_SET,
    /**
     * Objective function not allowed (request rejected)
     */
    OF_NOT_ALLOWED,
    /**
     * OF bit of the RP object set (request rejected)
     */
    OF_BIT_SET,
    /**
     * Global concurrent optimization not allowed (GCO extension)
     */
    GCO_NOT_ALLOWED,
    /**
     * P2MP Path computation is not allowed
     */
    P2MP_COMPUTATION_NOT_ALLOWED,
    /**
     * RP object missing
     */
    RP_MISSING,
    /**
     * RRO missing for a reoptimization request (R bit of the RP object set).
     */
    RRO_MISSING,
    /**
     * END-POINTS object missing
     */
    END_POINTS_MISSING,
    /**
     * LSP cleanup TLV missing
     */
    LSP_CLEANUP_TLV_MISSING,
    /**
     * SYMBOLIC-PATH-NAME TLV missing
     */
    SYMBOLIC_PATH_NAME_MISSING,
    /**
     * Synchronized path computation request missing.
     */
    SYNC_PATH_COMP_REQ_MISSING,
    /**
     * Unknown request reference
     */
    UNKNOWN_REQ_REF,
    /**
     * Attempt to establish a second PCEP session.
     */
    ATTEMPT_2ND_SESSION,
    /**
     * LSP Object missing.
     */
    LSP_MISSING,
    /**
     * ERO Object missing for a path in an LSP Update Request where TE-LSP setup is requested.
     */
    ERO_MISSING,
    /**
     * Srp Object missing for a path in an LSP Update Request where TE-LSP setup is requested.
     */
    SRP_MISSING,
    /**
     * LSP-IDENTIFIERS TLV missing for a path in an LSP Update Request where TE-LSP setup is requested.
     */
    LSP_IDENTIFIERS_TLV_MISSING,
    /**
     * Reception of an object with P flag not set although the P flag must be set according to this specification.
     */
    P_FLAG_NOT_SET,
    /**
     * Insufficient memory (GCO extension)
     */
    INSUFFICIENT_MEMORY,
    /**
     * Global concurrent optimization not supported (GCO extension)
     */
    GCO_NOT_SUPPORTED,
    /**
     * Diffserv-aware TE error: Unsupported Class-Type.
     */
    UNSUPPORTED_CT,
    /**
     * Diffserv-aware TE error: Invalid Class-Type.
     */
    INVALID_CT,
    /**
     * Diffserv-aware TE error: Class-Type and setup priority do not form a configured TE-class.
     */
    CT_AND_SETUP_PRIORITY_DO_NOT_FORM_TE_CLASS,

    /**
     * The PCE cannot satisfy the request due to insufficient memory
     */
    CANNOT_SATISFY_P2MP_REQUEST_DUE_TO_INSUFFISIENT_MEMMORY,
    /**
     * The PCE is not capable of P2MP computation
     */
    NOT_CAPPABLE_P2MP_COMPUTATION,
    /**
     * The PCE is not capable to satisfy the request due to no END-POINTS with leaf type 2
     */
    P2MP_NOT_CAPPABLE_SATISFY_REQ_DUE_LT2,
    /**
     * The PCE is not capable to satisfy the request due to no END-POINTS with leaf type 3
     */
    P2MP_NOT_CAPPABLE_SATISFY_REQ_DUE_LT3,
    /**
     * The PCE is not capable to satisfy the request due to no END-POINTS with leaf type 4
     */
    P2MP_NOT_CAPPABLE_SATISFY_REQ_DUE_LT4,
    /**
     * The PCE is not capable to satisfy the request due to inconsistent END-POINTS
     */
    P2MP_NOT_CAPPABLE_SATISFY_REQ_DUE_INCONSISTENT_EP,
    /**
     * P2MP Fragmented request failure
     */
    P2MP_FRAGMENTATION_FAILRUE,
    /**
     * Attempted LSP Update Request for a non- delegated LSP. The PCEP-ERROR Object is followed by the LSP Object that
     * identifies the LSP.
     */
    UPDATE_REQ_FOR_NON_LSP,
    /**
     * Attempted LSP Update Request if active stateful PCE capability was not negotiated active PCE.
     */
    UPDATE_REQ_FOR_NO_STATEFUL,
    /**
     * Attempted LSP Update Request for an LSP identified by an unknown PLSP-ID.
     */
    UNKNOWN_PLSP_ID,
    /**
     * A PCE indicates to a PCC that it has exceeded the resource limit allocated for its state, and thus it cannot
     * accept and process its LSP State Report message.
     */
    RESOURCE_LIMIT_EXCEEDED,
    /**
     * PCE-initiated LSP limit reached
     */
    LSP_LIMIT_EXCEEDED,
    /**
     * Delegation for PCE-initiated LSP cannot be revoked
     */
    DELEGATION_NON_REVOKABLE,
    /**
     * Non-zero PLSP-ID in LSP initiation request
     */
    NON_ZERO_PLSPID,
    /**
     * A PCE indicates to a PCC that it can not process (an otherwise valid) LSP State Report. The PCEP-ERROR Object is
     * followed by the LSP Object that identifies the LSP.
     */
    CANNOT_PROCESS_STATE_REPORT,
    /**
     * LSP Database version mismatch.
     */
    LSP_DB_VERSION_MISMATCH,
    /**
     * The LSP-DB-VERSION TLV Missing when State Synchronization Avoidance enabled.
     */
    DB_VERSION_TLV_MISSING_WHEN_SYNC_ALLOWED,
    /**
     * A PCC indicates to a PCE that it can not complete the state synchronization,
     */
    CANNOT_COMPLETE_STATE_SYNC,
    /**
     * SYMBOLIC-PATH-NAME in use
     */
    USED_SYMBOLIC_PATH_NAME,
    /**
     * LSP instantiation error: Unacceptable instantiation parameters
     */
    LSP_UNACC_INST_PARAMS,
    /**
     * LSP instantiation error: Internal error
     */
    LSP_INTERNAL_ERROR,
    /**
     * LSP instantiation error: RSVP signaling error
     */
    LSP_RSVP_ERROR
}