rsvpte_struct.h

实现了MPLS中的标签分发协议（LDP 3036 )的基本功能

           3 bits: Sender selection control

                000b: Reserved

                001b: Wildcard

                010b: Explicit

                011b - 111b: Reserved

      The low order bits of the option vector are determined by the
      style, as follows:

              WF 10001b
              FF 01010b
              SE 10010b

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

typedef struct rsvpStyleFlag_s {
  BITFIELDS_ASCENDING_4(u_int flag:8,	/* flags  */
    u_int reserved:19,			/* reserved */
    u_int shareControl:2,		/* sharing control */
    u_int senderSelectionControl:3); /* sender selection control */
} rsvpStyleFlag_t;

typedef struct rsvpStyleObject_s {
    struct rsvpObjectHeader_s hdr;

    union {
	struct rsvpStyleFlag_s flag;
	u_int mark;
    } flag;
} rsvpStyleObject_t;

#define RSVP_FILTER_SPEC_CLASS 10
#define RSVP_FILTER_SPEC_CTYPE_IPV4 1
#define RSVP_FILTER_SPEC_CTYPE_IPV6 2
#define RSVP_FILTER_SPEC_CTYPE_FLOW 3
#define RSVP_FILTER_SPEC4_SIZE 8
#define RSVP_FILTER_SPEC6_SIZE 20
#define RSVP_FILTER_SPEC_FLOW_SIZE 20

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

 FILTER_SPEC class = 10.

      o    IPv4 FILTER_SPEC object: Class = 10, 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 SrcAddress (4 bytes)                   |
   +---------------+---------------+---------------+---------------+
   |     //////    |     //////    |            SrcPort            |
   +---------------+---------------+---------------+---------------+


      o    IPv6 FILTER_SPEC object: Class = 10, 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 SrcAddress (16 bytes)                      +
   |                                                               |
   +                                                               +
   |                                                               |
   +---------------+---------------+---------------+---------------+
   |     //////    |     //////    |            SrcPort            |
   +---------------+---------------+---------------+---------------+


      o    IPv6 Flow-label FILTER_SPEC object: Class = 10, C-Type = 3

    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 SrcAddress (16 bytes)                  +
   |                                                               |
   +                                                               +
   |                                                               |
   +---------------+---------------+---------------+---------------+
   |    ///////    |            Flow Label (24 bits)               |
   +---------------+---------------+---------------+---------------+

      SrcAddress

           The IP source address for a sender host.  Must be non-zero.

      SrcPort

           The UDP/TCP source port for a sender, or zero to indicate
           `none'.

      Flow Label

           A 24-bit Flow Label, defined in IPv6.  This value may be used
           by the packet classifier to efficiently identify the packets
           belonging to a particular (sender->destination) data flow.

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

typedef struct rsvpFilterSpec4_s {
  u_int sourceAddr;
  u_short reserved;
  u_short sourcePort;
} rsvpFilterSpec4_t;

typedef struct rsvpFilterSpec6_s {
  u_char sourceAddr[RSVP_IPV6_ADDR_LEN];
  u_short reserved;
  u_short sourcePort;
} rsvpFilterSpec6_t;

typedef struct rsvpFilterSpecFlags_s {
  BITFIELDS_ASCENDING_2(u_int reserved:8,
    u_int flowLabel:24);
} rsvpFilterSpecFlags_t;

typedef struct rsvpFilterSpecFlow6_s {
  u_char sourceAddr[RSVP_IPV6_ADDR_LEN];
  union {
    u_int mark;
    struct rsvpFilterSpecFlags_s flowLabel;
  } flag;
} rsvpFilterSpecFlow6_t;

typedef struct rsvpFilterSpecObject_s {
    struct rsvpObjectHeader_s hdr;
    union {
	struct rsvpFilterSpec4_s ipv4;
	struct rsvpFilterSpec6_s ipv6;
	struct rsvpFilterSpecFlow6_s flow;
    } u;
} rsvpFilterSpecObject_t;

#define RSVP_SENDER_TEMPLATE_CLASS 11
#define RSVP_SENDER_TEMPLATE_CTYPE_IPV4 1
#define RSVP_SENDER_TEMPLATE_CTYPE_IPV6 2
#define RSVP_SENDER_TEMPLATE_CTYPE_FLOW 3
#define RSVP_SENDER_TEMPLATE_CTYPE_TUNNEL4 7
#define RSVP_SENDER_TEMPLATE_CTYPE_TUNNEL6 8
#define RSVP_SENDER_TEMPLATE_TUNNEL4_SIZE 8
#define RSVP_SENDER_TEMPLATE_TUNNEL6_SIZE 20

/**********************************************************************
      SENDER_TEMPLATE Class

      SENDER_TEMPLATE class = 11.

      o    IPv4 SENDER_TEMPLATE object: Class = 11, C-Type = 1

           Definition same as IPv4/UDP FILTER_SPEC object.

      o    IPv6 SENDER_TEMPLATE object: Class = 11, C-Type = 2

           Definition same as IPv6/UDP FILTER_SPEC object.

      o    IPv6 Flow-label SENDER_TEMPLATE object: Class = 11, C-Type = 3


   LSP_TUNNEL_IPv4 Sender Template Object

   Class = SENDER_TEMPLATE, 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 sender address                  |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  MUST be zero                 |            LSP ID             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      IPv4 tunnel sender address

         IPv4 address for a sender node

      LSP ID

         A 16-bit identifier used in the SENDER_TEMPLATE and the
         FILTER_SPEC that can be changed to allow a sender to share
         resources with itself.

   LSP_TUNNEL_IPv6 Sender Template Object

   Class = SENDER_TEMPLATE, 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 sender address                  |
   +                                                               +
   |                            (16 bytes)                         |
   +                                                               +
   |                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  MUST be zero                 |            LSP ID             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      IPv6 tunnel sender address

         IPv6 address for a sender node

      LSP ID

         A 16-bit identifier used in the SENDER_TEMPLATE and the
         FILTER_SPEC that can be changed to allow a sender to share
         resources with itself.
**********************************************************************/

#define rsvpSenderTemplate4_s rsvpFilterSpec4_s
#define rsvpSenderTemplate4_t rsvpFilterSpec4_t

#define rsvpSenderTemplate6_s rsvpFilterSpec6_s
#define rsvpSenderTemplate6_t rsvpFilterSpec6_t

#define rsvpSenderTemplateFlow6_s rsvpFilterSpecFlow6_s
#define rsvpSenderTemplateFlow6_t rsvpFilterSpecFlow6_t

#define rsvpteEncodeSenderTemplate4 rsvpteEncodeFilterSpec4
#define rsvpteEncodeSenderTemplate6 rsvpteEncodeFilterSpec6
#define rsvpteEncodeSenderTemplateFlow rsvpteEncodeFilterSpecFlow

#define rsvpteDecodeSenderTemplate4 rsvpteDecodeFilterSpec4
#define rsvpteDecodeSenderTemplate6 rsvpteDecodeFilterSpec6
#define rsvpteDecodeSenderTemplateFlow rsvpteDecodeFilterSpecFlow

typedef struct rsvpSenderTemplateTunnel4_s {
    u_int sender;
    u_short reserved;
    u_short lspId;
} rsvpSenderTemplateTunnel4_t;

typedef struct rsvpSenderTemplateTunnel6_s {
    u_char sender[RSVP_IPV6_ADDR_LEN];
    u_short reserved;
    u_short lspId;
} rsvpSenderTemplateTunnel6_t;

typedef struct rsvpSenderTemplateObject_s {
    struct rsvpObjectHeader_s hdr;
    union {
	struct rsvpSenderTemplate4_s ipv4;
	struct rsvpSenderTemplate6_s ipv6;
	struct rsvpSenderTemplateFlow6_s flow;
	struct rsvpSenderTemplateTunnel4_s tunnel4;
	struct rsvpSenderTemplateTunnel6_s tunnel6;
    } u;
} rsvpSenderTemplateObject_t;

#define RSVP_SENDER_TSPEC_CLASS 12
#define RSVP_SENDER_TSPEC_CTYPE_INTSRV 2

/**********************************************************************
      SENDER_TSPEC Class

      SENDER_TSPEC class = 12.

      o    Intserv SENDER_TSPEC object: Class = 12, C-Type = 2

   The RSVP SENDER_TSPEC object carries information about a data
   source's generated traffic. The required RSVP SENDER_TSPEC object
   contains a global Token_Bucket_TSpec parameter (service_number 1,
   parameter 127, as defined in [RFC 2215]). This TSpec carries traffic
   information usable by either the Guaranteed or Controlled-Load QoS
   control services.

        31           24 23           16 15            8 7             0
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   1   | 0 (a) |    reserved           |             7 (b)             |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   2   |    1  (c)     |0| reserved    |             6 (d)             |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   3   |   127 (e)     |    0 (f)      |             5 (g)             |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   4   |  Token Bucket Rate [r] (32-bit IEEE floating point number)    |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   5   |  Token Bucket Size [b] (32-bit IEEE floating point number)    |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   6   |  Peak Data Rate [p] (32-bit IEEE floating point number)       |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   7   |  Minimum Policed Unit [m] (32-bit integer)                    |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   8   |  Maximum Packet Size [M]  (32-bit integer)                    |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

     (a) - Message format version number (0)
     (b) - Overall length (7 words not including header)
     (c) - Service header, service number 1 (default/global information)
     (d) - Length of service 1 data, 6 words not including header
     (e) - Parameter ID, parameter 127 (Token_Bucket_TSpec)
     (f) - Parameter 127 flags (none set)
     (g) - Parameter 127 length, 5 words not including header


   In this TSpec, the parameters [r] and [b] are set to reflect the
   sender's view of its generated traffic. The peak rate parameter [p]
   may be set to the sender's peak traffic generation rate (if known and
   controlled), the physical interface line rate (if known), or positive
   infinity (if no better value is available).  Positive infinity is
   represented as an IEEE single-precision floating-point number with an
   exponent of all ones (255) and a sign and mantissa of all zeros.  The
   format of IEEE floating-point numbers is further summarized in [RFC
   1832].

   The minimum policed unit parameter [m] should generally be set equal
   to the size of the smallest packet generated by the application. This
   packet size includes the application data and all protocol headers at
   or above the IP level (IP, TCP, UDP, RTP, etc.). The size given does
   not include any link-level headers, because these headers will change
   as the packet crosses different portions of the internetwork.


   The [m] parameter is used by nodes within the network to compute the
   maximum bandwidth overhead needed to carry a flow's packets over the
   particular link-level technology, based on the ratio of [m] to the
   link-level header size. This allows the correct amount of bandwidth
   to be allocated to the flow at each point in the net.  Note that
   smaller values of this parameter lead to increased overhead
   estimates, and thus increased likelyhood of a reservation request
   being rejected by the node. In some cases, an application
   transmitting a low percentage of very small packets may therefore
   choose to set the value of [m] larger than the actual minimum
   transmitted packet size. This will increase the likelyhood of the
   reservation succeeding, at the expense of policing packets of size
   less than [m] as if they were of size [m].

   Note that the an [m] value of zero is illegal. A value of zero would
   indicate that no data or IP headers are present, and would give an
   infinite amount of link-level overhead.

   The maximum packet size parameter [M] should be set to the size of
   the largest packet the application might wish to generate, as