Method ITcIoUdpProtocolRecv:ReceiveData

Is called by the TCP/UDP RT module as a callback to transfer data.

Syntax

HRESULT TCOMAPI ReceiveData(ULONG ipAddr, USHORT udpDestPort, USHORT udpSrcPort, ULONG nData, PVOID pData, ETYPE_VLAN_HEADER* pVlan=0)

Return value

Type	Description
HRESULT	Indicates success and must be provided accordingly by the implemented module.

Parameter

Name	Type	Description
ipAddr	ULONG	The IP address of the sender. IP addresses are displayed with the most significant element in the last position. (Example: 192.168.2.1 -> 01 02 A8 C0)
udpDestPort	USHORT	Port on which the data was received.
udpSrcPort	USHORT	Port of the sender.
nData	ULONG	Number of bytes received.
pData	PVOID	Pointer to the received data.
pVlan	ETYPE_VLAN_HEADER	ETYPE_VLAN_HEADER structure - see below.

The VLAN header represents information about the VLAN.

typedef struct _ETYPE_VLAN_HEADER
{
    USHORT VLanType;
    unsigned short VLanIdH   : 4;
    unsigned short reserved1 : 1;
    unsigned short Priority  : 3;
    unsigned short VLanIdL   : 8;
} ETYPE_VLAN_HEADER, *PETYPE_VLAN_HEADER;