-#define SC_ESCAPED 0x80000000 /* saw a PPP_ESCAPE */
-#define SC_FLUSH 0x40000000 /* flush input until next PPP_FLAG */
-#define SC_VJ_RESET 0x20000000 /* Need to reset the VJ decompressor */
-#define SC_XMIT_BUSY 0x10000000 /* ppp_write_wakeup is active */