3.4.15. gc_RespService( )

The gc_RespService( ) function operates on an IPT board device and is used to respond to requests from an H.323 gatekeeper or a SIP registrar. Since some of the data may be protocol specific (in future releases), there is a facility to set the protocol type using IP parameters in datap, which is of type GC_PARM_BLK.

The following are the relevant function parameters:

• target_type - GCTGT_CCLIB_NETIF
• target_id - IPT board device

The following are the relevant parameters for the GC_PARM_BLK:

• set_id: IPSET_PROTOCOL
• parm_id: IPPARM_PROTOCOL_BITMASK, which can be have one of the following values:
  • IP_PROTOCOL_H323
  • IP_PROTOCOL_SIP
  • IP_PROTOCOL_H323 | IP_PROTOCOL_SIP

Note: The default value for the protocol, when not specified by the application, is IP_PROTOCOL_H323.

The GCEV_SERVICEREQ event indicates that a service has been requested by an H.323 gatekeeper or a SIP registrar. The event is received on an IPT board device handle. The event data includes a specification of the protocol used. The sr_getevtdatap( ) function returns a pointer to a GC_PARM_BLK that includes the following parameter information:

• set_ID - IPSET_PROTOCOL
• parm_ID - IPPARM_PROTOCOL_BITMASK, with one of the following values:
  • IP_PROTOCOL_H323
  • IP_PROTOCOL_SIP

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