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engine: client: introduce cookie protocol extension, when client connects to the server, it provides randomized 64-bit value to be prefixed into netchan messages

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* Prevent clientuseragent from leaking data.
* Process qport in netchan, cleaning up code
This commit is contained in:
Alibek Omarov
2026-05-25 23:29:04 +05:00
committed by a1batross
parent d61983a5d2
commit e5c4e49782
7 changed files with 152 additions and 30 deletions
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12
engine/common/netchan.h
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@@ -167,10 +167,11 @@ typedef enum fragsize_e
typedef enum netchan_flags_e
{
NETCHAN_USE_MUNGE = BIT( 0 ),
NETCHAN_USE_BZIP2 = BIT( 1 ),
NETCHAN_GOLDSRC = BIT( 2 ),
NETCHAN_USE_LZSS = BIT( 3 ), // mutually exclusive with bzip2
NETCHAN_USE_MUNGE = BIT( 0 ),
NETCHAN_USE_BZIP2 = BIT( 1 ),
NETCHAN_GOLDSRC = BIT( 2 ),
NETCHAN_USE_LZSS = BIT( 3 ), // mutually exclusive with bzip2
NETCHAN_USE_COOKIE = BIT( 4 ), // per-connection 64-bit cookie prefixed to every sequenced packet (NET_EXT_NETCHAN_COOKIE)
} netchan_flags_t;
// Network Connection Channel
@@ -240,6 +241,8 @@ typedef struct netchan_s
qboolean use_bz2;
qboolean use_lzss;
qboolean gs_netchan;
qboolean use_cookie;
uint64_t cookie;
} netchan_t;
extern netadr_t net_from;
@@ -252,6 +255,7 @@ extern int net_drop;
void Netchan_Init( void );
void Netchan_Shutdown( void );
void Netchan_Setup( netsrc_t sock, netchan_t *chan, netadr_t adr, int qport, void *client, int (*pfnBlockSize)(void *, fragsize_t mode ), uint flags );
void Netchan_SetCookie( netchan_t *chan, uint64_t cookie );
void Netchan_CreateFileFragmentsFromBuffer( netchan_t *chan, const char *filename, byte *pbuf, int size );
qboolean Netchan_CopyNormalFragments( netchan_t *chan, sizebuf_t *msg, size_t *length );
qboolean Netchan_CopyFileFragments( netchan_t *chan, sizebuf_t *msg );