SoftEtherVPN/src/Cedar/Proto.h

#ifndef PROTO_H
#define PROTO_H

// OpenVPN sends 2 bytes, thus this is the buffer size.
// If another protocol requires more bytes to be detected, the buffer size must be increased.
#define PROTO_CHECK_BUFFER_SIZE	2

#define PROTO_TCP_BUFFER_SIZE	(128 * 1024)

typedef enum PROTO_MODE
{
	PROTO_MODE_UNKNOWN = 0,
	PROTO_MODE_TCP = 1,
	PROTO_MODE_UDP = 2
} PROTO_MODE;

typedef struct PROTO
{
	CEDAR *Cedar;
	LIST *Impls;
} PROTO;

typedef struct PROTO_IMPL
{
	bool (*Init)(void **param, CEDAR *cedar, INTERRUPT_MANAGER *im, SOCK_EVENT *se);
	void (*Free)(void *param);
	char *(*Name)();
	bool (*IsPacketForMe)(const PROTO_MODE mode, const UCHAR *data, const UINT size);
	bool (*ProcessData)(void *param, TCP_RAW_DATA *received_data, FIFO *data_to_send);
	void (*BufferLimit)(void *param, const bool reached);
} PROTO_IMPL;

int ProtoImplCompare(void *p1, void *p2);

PROTO *ProtoNew(CEDAR *cedar);
void ProtoDelete(PROTO *proto);

bool ProtoImplAdd(PROTO *proto, PROTO_IMPL *impl);
PROTO_IMPL *ProtoImplDetect(PROTO *proto, const PROTO_MODE mode, const UCHAR *data, const UINT size);

bool ProtoHandleConnection(PROTO *proto, SOCK *sock);

#endif