84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
|
#ifndef __mrouter_packet_h
|
||
|
|
#pragma option push -b -a8 -pc -A- /*P_O_Push*/
|
||
|
|
#define __mrouter_packet_h
|
||
|
|
|
||
|
|
#include <assert.h>
|
||
|
|
|
||
|
|
typedef struct PACKET_BUFFER PACKET_BUFFER;
|
||
|
|
typedef struct PACKET_LIST_ENTRY PACKET_LIST_ENTRY;
|
||
|
|
|
||
|
|
typedef void (*PACKET_COMPLETION_FUNC) (PACKET_BUFFER *);
|
||
|
|
|
||
|
|
struct PACKET_LIST_ENTRY
|
||
|
|
{
|
||
|
|
LIST_ENTRY ListEntry;
|
||
|
|
PACKET_BUFFER * PacketBuffer;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define PACKET_BUFFER_ADDRESS_MAX 16
|
||
|
|
|
||
|
|
struct PACKET_BUFFER
|
||
|
|
{
|
||
|
|
LPBYTE Data; // storage for packet data
|
||
|
|
LPBYTE Start; // where the data begins, must be offset from Data
|
||
|
|
DWORD Length; // how long the data is, relative to Start
|
||
|
|
DWORD Max; // the maximum length of buffer, within Data
|
||
|
|
union {
|
||
|
|
DWORD Context; // for use by the originator of the packet
|
||
|
|
PVOID ContextPointer; // for use by the originator, but safe for 64-bit
|
||
|
|
};
|
||
|
|
WORD Protocol; // see below
|
||
|
|
WORD AddressLength;
|
||
|
|
BYTE Address [PACKET_BUFFER_ADDRESS_MAX];
|
||
|
|
PACKET_COMPLETION_FUNC CompletionFunc;
|
||
|
|
LONG ReferenceCount; // use interlocked access, do not access directly
|
||
|
|
LIST_ENTRY ListEntry; // for use only by the originator of the packet
|
||
|
|
};
|
||
|
|
|
||
|
|
#define PACKET_BUFFER_PROTOCOL_IP 0x0000
|
||
|
|
#define PACKET_BUFFER_PROTOCOL_VBI_RAW 0x0001
|
||
|
|
#define PACKET_BUFFER_PROTOCOL_DSS_ARP 0x0002
|
||
|
|
#define PACKET_BUFFER_PROTOCOL_DSS_RAW 0x0003
|
||
|
|
#define PACKET_BUFFER_PROTOCOL_DSS_MPT 0x0004
|
||
|
|
|
||
|
|
// PACKET_BUFFER_PROTOCOL_IP
|
||
|
|
// packet body is a full IP packet, including header and body
|
||
|
|
// IP address should be extracted from the message body
|
||
|
|
// address field is not used
|
||
|
|
|
||
|
|
// PACKET_BUFFER_PROTOCOL_DSS_RAW
|
||
|
|
// the address field is not used
|
||
|
|
// the packet length must be 130 bytes.
|
||
|
|
// the packet is a standard DSS frame: 3 bytes of header
|
||
|
|
// and 127 bytes of payload
|
||
|
|
|
||
|
|
// PACKET_BUFFER_PROTOCOL_DSS_MPT
|
||
|
|
// the address field may or may not be specified
|
||
|
|
// the address field is the sub-SCID ID
|
||
|
|
// if the address is not specified, the output driver should build the
|
||
|
|
// sub-SCID like an Ethernet MAC address. this only works for multicast packets,
|
||
|
|
// which have a fixed, deterministic IP address to MAC address mapping.
|
||
|
|
// if the address field exists (length is not zero), then the
|
||
|
|
// address length must be 6 and the address must contain an MPT sub-SCID ID.
|
||
|
|
|
||
|
|
static __inline void PacketBufferComplete (PACKET_BUFFER * packet)
|
||
|
|
{
|
||
|
|
assert (packet);
|
||
|
|
assert (packet -> CompletionFunc);
|
||
|
|
|
||
|
|
(*packet -> CompletionFunc) (packet);
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline void PacketBufferAddRef (PACKET_BUFFER * packet) {
|
||
|
|
assert (packet);
|
||
|
|
InterlockedIncrement (&packet -> ReferenceCount);
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline void PacketBufferRelease (PACKET_BUFFER * packet) {
|
||
|
|
assert (packet);
|
||
|
|
if (!InterlockedDecrement (&packet -> ReferenceCount))
|
||
|
|
PacketBufferComplete (packet);
|
||
|
|
}
|
||
|
|
|
||
|
|
#pragma option pop /*P_O_Pop*/
|
||
|
|
#endif // __mrouter_packet_h
|