LPM_DeleteState function (lpmapi.h)

The LPM_DeleteState function is called by the PCM to delete the LPMs' RSVP state information. RSVP states are deleted on various occasions, including when the SBM receives RSVP TEAR/ERR messages, or when an RSVP state times out. The LPM_DeleteState function call is synchronous. The PCM does not expect any results from the LPM for this request.

Syntax

void LPM_DeleteState(
  [in] RSVP_HOP     *pRcvdIfAddr,
  [in] MSG_TYPE     RsvpMsgType,
  [in] RSVP_SESSION *pRsvpSession,
  [in] RSVP_HOP     *pRsvpFromHop,
  [in] RESV_STYLE   *pResvStyle,
  [in] int          FilterSpecCount,
  [in] FILTER_SPEC  **ppFilterSpecList,
  [in] int          TearDownReason
);

Parameters

[in] pRcvdIfAddr

Pointer to the interface on which the RSVP TEAR message was received. The received interface IP address is supplied as the RSVP HOP object, and the Logical Interface Handle is set to the SNMP Index. If the PCM is calling the LPM_DeleteState function for any reason other than an RSVP TEAR message, this parameter can be null. Note that interface index numbers can change with the addition and deletion of interfaces, due to the Plug and Play features of Windows 2000.

[in] RsvpMsgType

RSVP message type for which the LPM should delete its state.

[in] pRsvpSession

Pointer to the RSVP session object for which the LPM should delete its state. This value is never null.

[in] pRsvpFromHop

Pointer to an RSVP HOP object identifying the node that sent the TEAR message. LPMs can use this parameter to locate state information.

[in] pResvStyle

Pointer to an argument that specifies the RSVP reservation style for RSVP RESV_TEAR messages. LPMs can use this parameter to locate state information.

[in] FilterSpecCount

Specifies the number of FilterSpecs in FilterSpecList. For RESV messages, FilterSpecCount is dependent on RsvpStyle. For PATH messages, this value will always be 1.

[in] ppFilterSpecList

Array of FilterSpec pointers. Note that the contents of FilterSpecList is dependent on RsvpStyle; if RsvpMsgType is RSVP_PATH then FilterSpecList specifies the SenderTemplate, if RsvpMsgType is RSVP_RESV then FilterSpecList is the list of filters for which the RESV state needs to be deleted.

[in] TearDownReason

Reason for deleting the state. Possible values are:

RCVD_PATH_TEAR

RCVD_RESV_TEAR

ADM_CTRL_FAILED

STATE_TIMEOUT

FLOW_DURATION

LPMs can use DeleteReason for statistical gathering or any other use.

Return value

None

Remarks

The PCM will call the LPM_DeleteState function for each LPM; LPMs should be prepared to handle LPM_DeleteState for a nonexistent state, as described further in the Remarks section of the cbAdmitResult function.

Requirements

See also

cbAdmitResult