rsvpte_struct

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/*
 *  Copyright (C) James R. Leu 2003
 *  [e-mail]
 *
 *  This software is covered under the LGPL, for more
 *  info check out http://www.gnu.org/copyleft/lgpl.html
 */

#ifndef RSVPTE_STRUCT_H
#define RSVPTE_STRUCT_H

#include "mpls_struct.h"
#include "mpls_list.h"
#include "mpls_refcnt.h"
#include "mpls_bitfield.h"

MPLS_LIST_ROOT(rsvpte_if_list, rsvpte_if);

typedef struct rsvpte_global {
    struct rsvpte_if_list iff;

    struct mpls_inet_addr lsr_identifier;
    mpls_admin_state_enum admin_state;

    mpls_lock_handle global_lock;
    mpls_instance_handle user_data;

    mpls_tree_handle addr_tree;

    mpls_socket_handle ra_socket;

    mpls_timer_mgr_handle timer_handle;
    mpls_socket_mgr_handle socket_handle;
    mpls_fib_handle fib_handle;
    mpls_ifmgr_handle ifmgr_handle;

#if MPLS_USE_LSR
    mpls_cfg_handle lsr_handle;
#else
    mpls_mpls_handle mpls_handle;
#endif
} rsvpte_global;

typedef struct rsvpte_if {
    MPLS_REFCNT_FIELD;
    MPLS_LIST_ELEM(rsvpte_if) _global;
    int label_space;
    uint32_t index;
    mpls_if_handle handle;

    mpls_oper_state_enum oper_state;
    mpls_admin_state_enum admin_state;
} rsvpte_if;

#define RSSPV_RSVP_ENC_OBJECTERROR -1
#define RSSPV_RSVP_DEC_OBJECTERROR -2

#define RSVP_IPV4_ADDR_LEN 4
#define RSVP_IPV6_ADDR_LEN 16

/**********************************************************************
    RSVP Objects

         Every object consists of one or more 32-bit words with a one-
         word header, with the following format:

                0             1              2             3
         +-------------+-------------+-------------+-------------+
         |       Length (bytes)      |  Class-Num  |   C-Type    |
         +-------------+-------------+-------------+-------------+
         |                                                       |
         //                  (Object contents)                   //
         |                                                       |
         +-------------+-------------+-------------+-------------+

 An object header has the following fields:

         Length

              A 16-bit field containing the total object length in
              bytes.  Must always be a multiple of 4, and at least 4.

         Class-Num

              Identifies the object class; values of this field are
              defined in Appendix A.  Each object class has a name,
              which is always capitalized in this document.  An RSVP
              implementation must recognize the following classes:

              NULL

                   A NULL object has a Class-Num of zero, and its C-Type
                   is ignored.  Its length must be at least 4, but can
                   be any multiple of 4.  A NULL object may appear
                   anywhere in a sequence of objects, and its contents
                   will be ignored by the receiver.

              SESSION

                   Contains the IP destination address (DestAddress),
                   the IP protocol id, and some form of generalized
                   destination port, to define a specific session for
                   the other objects that follow.  Required in every
                   RSVP message.

              RSVP_HOP

                   Carries the IP address of the RSVP-capable node that
                   sent this message and a logical outgoing interface
                   handle (LIH; see Section 3.3).  This document refers
                   to a RSVP_HOP object as a PHOP ("previous hop")
                   object for downstream messages or as a NHOP (" next
                   hop") object for upstream messages.

              TIME_VALUES

                   Contains the value for the refresh period R used by
                   the creator of the message; see Section 3.7.
                   Required in every Path and Resv message.

              STYLE

                   Defines the reservation style plus style-specific
                   information that is not in FLOWSPEC or FILTER_SPEC
                   objects.  Required in every Resv message.

              FLOWSPEC

                   Defines a desired QoS, in a Resv message.

              FILTER_SPEC

                   Defines a subset of session data packets that should
                   receive the desired QoS (specified by a FLOWSPEC
                   object), in a Resv message.

              SENDER_TEMPLATE

                   Contains a sender IP address and perhaps some
                   additional demultiplexing information to identify a
                   sender.  Required in a Path message.

              SENDER_TSPEC

                   Defines the traffic characteristics of a sender's
                   data flow.  Required in a Path message.

              ADSPEC

                   Carries OPWA data, in a Path message.

              ERROR_SPEC

                   Specifies an error in a PathErr, ResvErr, or a
                   confirmation in a ResvConf message.

              POLICY_DATA

                   Carries information that will allow a local policy
                   module to decide whether an associated reservation is
                   administratively permitted.  May appear in Path,
                   Resv, PathErr, or ResvErr message.

                   The use of POLICY_DATA objects is not fully specified
                   at this time; a future document will fill this gap.

              INTEGRITY

                   Carries cryptographic data to authenticate the
                   originating node and to verify the contents of this
                   RSVP message.  The use of the INTEGRITY object is
                   described in [Baker96].

              SCOPE

                   Carries an explicit list of sender hosts towards
                   which the information in the message is to be
                   forwarded.  May appear in a Resv, ResvErr, or
                   ResvTear message.  See Section 3.4.

              RESV_CONFIRM

                   Carries the IP address of a receiver that requested a
                   confirmation.  May appear in a Resv or ResvConf
                   message.

**********************************************************************/

#define RSVP_OBJECT_HDRSIZE 4

typedef struct rsvpObjectHeader_s {
    u_short length;
    u_char class;
    u_char cType;
} rsvpObjectHeader_t;


#define RSVP_SESSION_CLASS 1
#define RSVP_SESSION_CTYPE_IPV4 1
#define RSVP_SESSION_CTYPE_IPV6 2
#define RSVP_SESSION_CTYPE_TUNNEL4 7
#define RSVP_SESSION_CTYPE_TUNNEL6 8

/**********************************************************************
    RSVP SESSION Object 

     o IPv4/UDP SESSION object: Class = 1, C-Type = 1
 
    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +---------------+---------------+---------------+---------------+
   |                  IPv4 DestAddress (4 bytes)                   |
   +---------------+---------------+---------------+---------------+
   | Protocol Id   |     Flags     |            DstPort            |
   +---------------+---------------+---------------+---------------+

     o IPv6/UDP SESSION object: Class = 1, C-Type = 2

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +---------------+---------------+---------------+---------------+
   |                                                               |
   +                                                               +
   |                                                               |
   +                   IPv6 DestAddress (16 bytes)                 +
   |                                                               |
   +                                                               +
   |                                                               |
   +---------------+---------------+---------------+---------------+
   |  Protocol Id  |     Flags     |           DstPort             |
   +---------------+---------------+---------------+---------------+

    DestAddress

           The IP unicast or multicast destination address of the
           session.  This field must be non-zero.

    Protocol Id

           The IP Protocol Identifier for the data flow.  This field
           must be non-zero.
    Flags

           0x01 = E_Police flag

                The E_Police flag is used in Path messages to determine
                the effective "edge" of the network, to control traffic
                policing.  If the sender host is not itself capable of
                traffic policing, it will set this bit on in Path
                messages it sends.  The first node whose RSVP is capable
                of traffic policing will do so (if appropriate to the
                service) and turn the flag off.

     DstPort

           The UDP/TCP destination port for the session.  Zero may be
           used to indicate `none'.

           Other SESSION C-Types could be defined in the future to
           support other demultiplexing conventions in the transport-
           layer or application layer.

   LSP_TUNNEL_IPv4 Session Object

   Class = SESSION, LSP_TUNNEL_IPv4 C-Type = 7

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                   IPv4 tunnel end point address               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  MUST be zero                 |      Tunnel ID                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                       Extended Tunnel ID                      |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      IPv4 tunnel end point address

         IPv4 address of the egress node for the tunnel.

      Tunnel ID

         A 16-bit identifier used in the SESSION that remains constant
         over the life of the tunnel.

      Extended Tunnel ID

         A 32-bit identifier used in the SESSION that remains constant
         over the life of the tunnel.  Normally set to all zeros.
         Ingress nodes that wish to narrow the scope of a SESSION to the
         ingress-egress pair may place their IPv4 address here as a
         globally unique identifier.


   LSP_TUNNEL_IPv6 Session Object

   Class = SESSION, LSP_TUNNEL_IPv6 C_Type = 8

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                                                               |
   +                                                               +
   |                   IPv6 tunnel end point address               |
   +                                                               +
   |                            (16 bytes)                         |
   +                                                               +
   |                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  MUST be zero                 |      Tunnel ID                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                                                               |
   +                                                               +
   |                       Extended Tunnel ID                      |
   +                                                               +
   |                            (16 bytes)                         |
   +                                                               +
   |                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      IPv6 tunnel end point address

         IPv6 address of the egress node for the tunnel.

      Tunnel ID

         A 16-bit identifier used in the SESSION that remains constant
         over the life of the tunnel.

      Extended Tunnel ID

         A 16-byte identifier used in the SESSION that remains constant
         over the life of the tunnel.  Normally set to all zeros.
         Ingress nodes that wish to narrow the scope of a SESSION to the
         ingress-egress pair may place their IPv6 address here as a
         globally unique identifier.

**********************************************************************/

#define RSVP_SESSION4_SIZE 8

typedef struct rsvpSession4_s {