/* @(#)pk.h 5.6 (Berkeley) 4/5/88 */ struct header { char sync; char ksize; unsigned short sum; char cntl; char ccntl; }; #define HDRSIZ 6 /* Packet header size */ #define PACKSIZE 64 /* Standard packet size */ #define WINDOWS 7 /* number of outstanding un-ack'd packets */ struct pack { short p_state; /* line state */ short p_bits; /* mask for getepack */ short p_rsize; /* input packet size */ short p_xsize; /* output packet size */ struct header p_ihbuf; /* input header */ struct header p_ohbuf; /* output header */ char *p_rptr; char **p_ipool; char p_xcount; /* # active output buffers */ char p_rcount; char p_lpsize; /* log(psize/32) */ char p_obusy; /* output busy? for reentrant pkoutput() */ char p_srxmit; char p_rwindow; /* window size */ char p_swindow; char p_msg; /* control msg */ char p_rmsg; /* repeated control msg */ char p_ps,p_pr; /* last packet sent, recv'd */ char p_rpr; char p_nxtps; /* next output seq number */ char p_imap; /* bit map of input buffers */ char p_pscopy; /* newest output packet */ char *p_ob[8]; /* output buffers */ char *p_ib[8]; /* input buffers */ char p_os[8]; /* output buffer status */ char p_is[8]; /* input buffer status */ short p_osum[8]; /* output checksums */ short p_isum[8]; /* input checksums */ int p_ifn, p_ofn; }; #define CHECK 0125252 #define SYN 020 #define MOD8 7 #define ISCNTL(a) ((a & 0300)==0) /* MIN may have been defined in <sys/param.h> */ #undef MIN #define MIN(a,b) ((a<b)? a:b) extern char next[8]; extern char mask[8]; /* * driver state */ #define DEAD 0 #define INITa 1 #define INITb 2 #define INITab 3 #define LIVE 010 #define RXMIT 020 #define RREJ 040 #define PDEBUG 0200 #define DRAINO 0400 #define WAITO 01000 #define DOWN 02000 #define RCLOSE 04000 #define BADFRAME 020000 /* * io buffer states */ #define B_NULL 0 #define B_READY 1 #define B_SENT 2 #define B_RESID 010 #define B_COPY 020 #define B_MARK 040 #define B_SHORT 0100 /* read or write */ #define B_WRITE 0 #define B_READ 1 /* * control messages */ #define CLOSE 1 #define RJ 2 #define SRJ 3 #define RR 4 #define INITC 5 #define INITB 6 #define INITA 7 #define M_CLOSE 002 #define M_RJ 004 #define M_SRJ 010 #define M_RR 020 #define M_INITC 040 #define M_INITA 0200 #define M_INITB 0100 #define NPLINES 2 extern int pksizes[];