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- Implement dual protocol support (#4962)

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- Fix several UDP spoofing security issues
This commit is contained in:
Thilo Schulz 2011-07-12 11:59:48 +00:00
parent 309c322b80
commit e06c117e9e
13 changed files with 550 additions and 247 deletions
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17
code/qcommon/qcommon.h
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@ -195,7 +195,8 @@ void NET_Sleep(int msec);
#define MAX_DOWNLOAD_WINDOW 48 // ACK window of 48 download chunks. Cannot set this higher, or clients
// will overflow the reliable commands buffer
#define MAX_DOWNLOAD_BLKSIZE 1024 // 896 byte block chunks
#define NETCHAN_GENCHECKSUM(challenge, sequence) ((challenge) ^ ((sequence) * (challenge)))
/*
Netchan handles packet fragmentation and out of order / duplicate suppression
@ -224,10 +225,16 @@ typedef struct {
int unsentFragmentStart;
int unsentLength;
byte unsentBuffer[MAX_MSGLEN];
int challenge;
#ifdef LEGACY_PROTOCOL
qboolean compat;
#endif
} netchan_t;
void Netchan_Init( int qport );
void Netchan_Setup( netsrc_t sock, netchan_t *chan, netadr_t adr, int qport );
void Netchan_Setup(netsrc_t sock, netchan_t *chan, netadr_t adr, int qport, int challenge, qboolean compat);
void Netchan_Transmit( netchan_t *chan, int length, const byte *data );
void Netchan_TransmitNextFragment( netchan_t *chan );
@ -243,7 +250,8 @@ PROTOCOL
==============================================================
*/
#define PROTOCOL_VERSION 68
#define PROTOCOL_VERSION 69
#define PROTOCOL_LEGACY_VERSION 68
// 1.31 - 67
// maintain a list of compatible protocols for demo playing
@ -863,6 +871,9 @@ extern cvar_t *cl_packetdelay;
extern cvar_t *sv_packetdelay;
extern cvar_t *com_protocol;
#ifdef LEGACY_PROTOCOL
extern cvar_t *com_legacyprotocol;
#endif
// com_speeds times
extern int time_game;