RtnGetPacket

RtnGetPacket returns a pointer to an RtxTcpIp Stack packet structure. RtnGetPacket is used to obtain a packet from the driver receive packet pool. The length of the packet is guaranteed to be long enough to contain length bytes of data (it may be longer). RtnGetPacket is normally used in the driver receive thread to obtain a packet to place received data into. The RtnDecodePacket routine is used to access the data area, length and ndp fields of the packet.

Syntax

void * RtnGetPacket(
    void *ndp,
    long length
);

Parameters

ndp

Network Device Pointer. Opaque network device identifier (pointer).

length

Length required for the packet.

Return Values

A pointer to the RtxTcpIp Stack packet structure. NULL on failure.

Requirements

Header	Drvutl.h
Library	Rtxtcpip.lib

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