LogDroppedPacket (Compact 2013)

3/28/2014

This function is used by client dynamic-link libraries (DLLs) that monitor dropped packets.

Syntax

typedef VOID (*PNAT_LOG_DROPPED_PACKET)(
  DWORD SourceAddr,
  DWORD DestAddr, 
  USHORT SourcePort, 
  USHORT DestPort, 
  DWORD PacketSize,
  BYTE Protocol,
  DWORD Proto1, 
  DWORD Proto2,
  DWORD Proto3, 
  DWORD Proto4
);

Parameters

• SourceAddr
  [in] The source network address of the computer or networked device that initiated the packet that was dropped. The value is provided in TCP/IP network byte order format.

  Security Note:
  This information is taken from the packet data, and may have been faked or spoofed.

• DestAddr
  [in] The destination network address for the packet that was dropped. The value is provided in TCP/IP network byte order format.

• SourcePort
  [in] The source port number from which the packet originated. The value is provided in TCP/IP network byte order format.

• DestPort
  [in] The destination port number for which the packet was targeted. The value is provided in TCP/IP network byte order format.

• PacketSize
  [in] The size of the packet that was dropped.

• Protocol
  [in] Indicates the network protocol (TCP, UDP) for this connection. The protocol is indicated by one of the NAT_PROTOCOL * flags listed in IPNat.h.

• Proto1
  [in] Protocol-specific data.

• Proto2
  [in] Protocol-specific data.

• Proto3
  [in] Protocol-specific data.

• Proto4
  [in] Protocol-specific data.

  Note

  The values for the protocol-specific data depend on the specific protocol in use. The following table shows the corresponding values for the TCP and ICMP protocols. These values are not used for UDP.

  TCP	ICMP
  Proto1 = SequenceNumber	Proto1 = ICMP Type value (such as ICMPv6_ROUTER_SOLICIT and ICMPv6_ROUTER_ADVERT, as defined in ICMP6.h).
  Proto2 = AckNumber	Proto2 = ICMP Code value (such as ICMPv6_ADDRESS_UNREACHABLE and ICMPv6_PORT_UNREACHABLE, as defined in ICMP6.h).
  Proto3 = WindowSize	Proto3 Not used.
  Proto4 = ProtocolHeader	Proto4 Not used.

Return Value

None.

Remarks

This function is on the critical path for network address translation (NAT), and therefore must return quickly to prevent degradation of performance.

Requirements

Header	natedit.h
Library	coredll.dll

See Also

Reference

Network Address Translation Functions
LogConnectionCreation
LogConnectionDeletion
LogInit