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Cedar: Improve IsPacketForMe()'s "data" argumment in PROTO_IMPL

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This allows a protocol implementation to implicitly cast the variable to the type it prefers.
This commit is contained in:
Davide Beatrici 2020-07-29 20:00:46 +02:00
parent b339104f4f
commit d8aa470192
3 changed files with 10 additions and 11 deletions
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2
src/Cedar/Proto.h
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@ -48,7 +48,7 @@ typedef struct PROTO_IMPL
const PROTO_OPTION *(*Options)();
bool (*Init)(void **param, const LIST *options, CEDAR *cedar, INTERRUPT_MANAGER *im, SOCK_EVENT *se, const char *cipher, const char *hostname);
void (*Free)(void *param);
bool (*IsPacketForMe)(const PROTO_MODE mode, const UCHAR *data, const UINT size);
bool (*IsPacketForMe)(const PROTO_MODE mode, const void *data, const UINT size);
bool (*ProcessData)(void *param, TCP_RAW_DATA *in, FIFO *out);
bool (*ProcessDatagrams)(void *param, LIST *in, LIST *out);
} PROTO_IMPL;

9
src/Cedar/Proto_OpenVPN.c
View File

@ -69,16 +69,17 @@ void OvsFree(void *param)
}
// Check whether it's an OpenVPN packet
bool OvsIsPacketForMe(const PROTO_MODE mode, const UCHAR *data, const UINT size)
{
if (mode == PROTO_MODE_TCP)
bool OvsIsPacketForMe(const PROTO_MODE mode, const void *data, const UINT size)
{
if (data == NULL || size < 2)
{
return false;
}
if (data[0] == 0x00 && data[1] == 0x0E)
if (mode == PROTO_MODE_TCP)
{
const UCHAR *raw = data;
if (raw[0] == 0x00 && raw[1] == 0x0E)
{
return true;
}

4
src/Cedar/Proto_OpenVPN.h
View File

@ -215,11 +215,9 @@ const char *OvsName();
const PROTO_OPTION *OvsOptions();
bool OvsInit(void **param, const LIST *options, CEDAR *cedar, INTERRUPT_MANAGER *im, SOCK_EVENT *se, const char *cipher, const char *hostname);
void OvsFree(void *param);
bool OvsIsPacketForMe(const PROTO_MODE mode, const UCHAR *data, const UINT size);
bool OvsIsPacketForMe(const PROTO_MODE mode, const void *data, const UINT size);
bool OvsProcessData(void *param, TCP_RAW_DATA *in, FIFO *out);
bool OvsProcessDatagrams(void *param, LIST *in, LIST *out);
bool OvsIsOk(void *param);
UINT OvsEstablishedSessions(void *param);
OPENVPN_SERVER *NewOpenVpnServer(const LIST *options, CEDAR *cedar, INTERRUPT_MANAGER *interrupt, SOCK_EVENT *sock_event);
void FreeOpenVpnServer(OPENVPN_SERVER *s);