110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
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//=============================================================================
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// Copyright (c) 1998 Microsoft Corporation
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// File Name: packet.h
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// Abstract:
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//
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// Author: K.S.Lokesh (lokeshs@) 1-1-98
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//=============================================================================
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//-----------------------------------------------------------------------------
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// ASYNC_SOCKET_DATA structure is used to pass / receive back data from an
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// asynchronous wait recv from call
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//-----------------------------------------------------------------------------
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typedef struct _ASYNC_SOCKET_DATA {
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OVERLAPPED Overlapped;
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WSABUF WsaBuf;
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SOCKADDR_IN SrcAddress;
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DWORD FromLen;
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DWORD NumBytesReceived;
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DWORD Flags;
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DWORD Status;
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PIF_TABLE_ENTRY pite; //pite is valid as long as recvFrom is pending
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} ASYNC_SOCKET_DATA, *PASYNC_SOCKET_DATA;
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#define PACKET_BUFFER_SIZE 4000
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#pragma pack(1)
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//-----------------------------------------------------------------------------
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// DVMRP_HEADER
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//-----------------------------------------------------------------------------
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typedef struct _DVMRP_HEADER {
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UCHAR Vertype;
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UCHAR Code;
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USHORT Xsum;
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USHORT Reserved;
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UCHAR MinorVersion;
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UCHAR MajorVersion;
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} DVMRP_HEADER, *PDVMRP_HEADER;
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#define MIN_PACKET_SIZE sizeof(DVMRP_HEADER)
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#define IPVERSION 4
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//-----------------------------------------------------------------------------
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// IP_HEADER
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//-----------------------------------------------------------------------------
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typedef struct _IP_HEADER {
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UCHAR Hl; // Version and length.
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UCHAR Tos; // Type of service.
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USHORT Len; // Total length of datagram.
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USHORT Id; // Identification.
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USHORT Offset; // Flags and fragment offset.
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UCHAR Ttl; // Time to live.
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UCHAR Protocol; // Protocol.
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USHORT Xsum; // Header checksum.
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struct in_addr Src; // Source address.
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struct in_addr Dstn; // Destination address.
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} IP_HEADER, *PIP_HEADER;
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#pragma pack()
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//
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// prototypes
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//
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DWORD
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JoinMulticastGroup (
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SOCKET Sock,
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DWORD Group,
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DWORD IfIndex,
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IPADDR IpAddr
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);
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DWORD
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PostAsyncRead(
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PIF_TABLE_ENTRY pite
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);
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DWORD
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McastSetTtl(
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SOCKET sock,
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UCHAR ttl
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);
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VOID
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ProcessAsyncReceivePacket(
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DWORD ErrorCode,
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DWORD NumBytesRecv,
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LPOVERLAPPED pOverlapped
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);
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