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Cedar: prepare Proto for UDP support

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- An additional parameter is added to IsPacketForMe(), used to specify the protocol type (currently either TCP or UDP).
- SupportedModes() is dropped because it's now redundant.
- IsOk() and EstablishedSessions() are dropped because error checking should be handled by the implementation.
- ProtoImplDetect() now takes a buffer and its size rather than a SOCK, so that it can be used to detect UDP protocols.
- The OpenVPN toggle check is moved to ProtoImplDetect(), so that we don't have to duplicate it once UDP support is implemented.
This commit is contained in:
Davide Beatrici
2020-05-11 07:07:04 +02:00
parent 7e8b3c0b39
commit 667108319d
4 changed files with 71 additions and 111 deletions
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15
src/Cedar/Proto.h
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@ -7,8 +7,12 @@
#define PROTO_TCP_BUFFER_SIZE (128 * 1024)
#define PROTO_MODE_TCP 1
#define PROTO_MODE_UDP 2
typedef enum PROTO_MODE
{
PROTO_MODE_UNKNOWN = 0,
PROTO_MODE_TCP = 1,
PROTO_MODE_UDP = 2
} PROTO_MODE;
typedef struct PROTO
{
@ -21,12 +25,9 @@ typedef struct PROTO_IMPL
bool (*Init)(void **param, CEDAR *cedar, INTERRUPT_MANAGER *im, SOCK_EVENT *se);
void (*Free)(void *param);
char *(*Name)();
UINT (*SupportedModes)();
bool (*IsPacketForMe)(const UCHAR *data, const UINT size);
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);
bool (*IsOk)(void *param);
UINT (*EstablishedSessions)(void *param);
} PROTO_IMPL;
int ProtoImplCompare(void *p1, void *p2);
@ -35,7 +36,7 @@ PROTO *ProtoNew(CEDAR *cedar);
void ProtoDelete(PROTO *proto);
bool ProtoImplAdd(PROTO *proto, PROTO_IMPL *impl);
PROTO_IMPL *ProtoImplDetect(PROTO *proto, SOCK *sock);
PROTO_IMPL *ProtoImplDetect(PROTO *proto, const PROTO_MODE mode, const UCHAR *data, const UINT size);
bool ProtoHandleConnection(PROTO *proto, SOCK *sock);