libxrdp: add our own mppc compression instead of using the freerdp mppc

1 files changed, 26 insertions, 1 deletions

diff --git a/libxrdp/libxrdp.h b/libxrdp/libxrdp.h
index 34924715..6a4ac17e 100644
--- a/libxrdp/libxrdp.h
+++ b/libxrdp/libxrdp.h
@@ -116,7 +116,7 @@ struct xrdp_rdp
   int share_id;
   int mcs_channel;
   struct xrdp_client_info client_info;
-  void* mppc_enc;
+  struct xrdp_mppc_enc* mppc_enc;
   void* rfx_enc;
 };
 
@@ -213,6 +213,31 @@ struct xrdp_orders
   struct xrdp_orders_state orders_state;
 };
 
+#define PROTO_RDP_40 1
+#define PROTO_RDP_50 2
+
+struct xrdp_mppc_enc
+{
+  int    protocol_type;    /* PROTO_RDP_40, PROTO_RDP_50 etc */
+  char  *historyBuffer;    /* contains uncompressed data */
+  char  *outputBuffer;     /* contains compressed data */
+  char  *outputBufferPlus;
+  int    historyOffset;    /* next free slot in historyBuffer */
+  int    buf_len;          /* length of historyBuffer, protocol dependant */
+  int    bytes_in_opb;     /* compressed bytes available in outputBuffer */
+  int    flags;            /* PACKET_COMPRESSED, PACKET_AT_FRONT, PACKET_FLUSHED etc */
+  int    flagsHold;
+  int    first_pkt;        /* this is the first pkt passing through enc */
+  tui16 *hash_table;
+};
+
+int APP_CC
+compress_rdp(struct xrdp_mppc_enc *enc, tui8 *srcData, int len);
+struct xrdp_mppc_enc * APP_CC
+mppc_enc_new(int protocol_type);
+void APP_CC
+mppc_enc_free(struct xrdp_mppc_enc *enc);
+
 /* xrdp_tcp.c */
 struct xrdp_tcp* APP_CC
 xrdp_tcp_create(struct xrdp_iso* owner, struct trans* trans);