*DECK IPPBEGN 
USETEXT TEXTIPL 
      PROC IPPBEGN (APPNAME, MESSCOUNT, HOSTUN, COMPSTATUS);
*CALL COPYRITE          CDCNET - COPYRIGHT CONTROL DATA. 1992.
# TITLE IPPBEGN - BEGIN NETWORK                                        #
  
      BEGIN                            # IPPBEGN                       #
# 
****  IPPBEGN  BEGIN NETWORK
* 
*     THIS PROCEDURE ESTABLISHES A CONNENTION TO THE NETWORK VIA
*     NAM.
* 
*     PROC IPPBEGN
* 
*     ENTRY    APPNAME    = APPLICATION NAME.  MUST BE DEFINED IN 
*                           SYSTEM COMMON DECK *COMTNAP*. 
*              MESSCOUNT  = INTEGER OF MESSAGE COUNT FOR RELEASING DEBUG
*                           FILE.  IF 0, DONT RELEASE.
*              HOSTUN     = USERNAME OF TCPHOST FILE. 
* 
*     EXIT     COMPSTATUS = NETON STATUS. 
* 
*     METHOD   OBTAIN THE LOCAL HOST MACHINE ID.  BASED ON THE ID 
*              THE TCP/IP GATEWAY TITLE IS INITIALIZED AND THE LOCAL
*              HOSTNAME IS INTIALIZED.  THE TCPHOST FILE IS ATTACHED
*              AND THE LOCAL HOST IP ADDRESS IS OBTAINED FROM THE FILE. 
*              NETON IS CALLED TO INITIATE THE NAM CONNECTION.
*              IF THE NETON WAS SUCCESSFUL, THEN THE ACNST IS 
*              INITIALIZED. 
# 
  
# 
****  PROC IPPBEGN - XREF LIST
# 
      XREF
        BEGIN 
        FUNC IPUGHBN B;  # GET HOST BY NAME                            #
        PROC IPUMCLR;    # CLEAR MEMORY                                #
        PROC MACHID;     # -MACREL- TO GET MACHINE ID                  #
        PROC NETON;      # CONNECT APPLICATION TO NETWORK              #
        PROC NETREL;     # RELEASE LOG FILE                            #
        END 
# 
**
# 
      ITEM APPNAME        C(10);       # NETON APPLICATION NAME        #
      ITEM MESSCOUNT          I;       # NAM MESSGE COUNT FOR LOGGING  #
      ITEM HOSTUN         C(10);       # TCPHOST USERNAME              #
      ITEM COMPSTATUS S:NETON$STATUS;  # STATUS RETURNED FROM *NETON*  #
  
      ITEM ACNENTRY           I;       # ACN LOOP COUNTER              #
      ITEM HOSTNAME       C(30);       # LOCAL HOST NAME               #
      CONTROL EJECT;
  
# 
****  START MAIN PROCEDURE
# 
  
      IPMC = MESSCOUNT; 
      IPHOSTUN = HOSTUN;
      NDLFILE = NLFILE; 
      DFLAG = FALSE;                   # DEBUG FLAG                    #
  
      MACHID (TGW$GWNAME);             # SETUP TCP GATEWAY NAME        #
      TGW$BASENAME [0] = BASENAME$; 
      C<0,1>TGW$MID [0] = "H";
  
# 
****  SEARCH TCPHOST FILE FOR THE LOCAL HOST IP ADDRESS.
# 
  
      C<0,30>HOSTNAME = HOSTNAME$;
      C<10,2>HOSTNAME = C<1,2>TGW$MID [0];
      IF NOT IPUGHBN (HOSTNAME, HST$ADDR, IPHOSTUN) 
      THEN
        BEGIN                          # HOST FILE NOT FOUND           #
        COMPSTATUS = NETON$STATUS"HSTNOTFOUND"; 
        RETURN; 
        END 
  
      IF IPMC NQ 0
      THEN
        NETREL (NDLFILE, 0, 0);        # INITIALIZE *ZZZZZDN* FILE     #
  
      NETON (APPNAME, NSUP, COMPSTATUS, MINACN$, MAXACN$);
  
# 
****  INITIALIZE THE ACN SOCKET TABLE IF NETTED ON
# 
      IF COMPSTATUS EQ S"SUCCESS" 
      THEN
        BEGIN                          # NAM AVAILABLE                 #
        IPUMCLR (LOC (ACN$ST), MAXACN$ * ACNSIZE$);# CLEAR ACN TABLES  #
  
# 
****  INITIALIZE FIXED FIELDS IN THE OUTPUT DATA ABH. 
# 
  
        P<ABH> = LOC(DABH);            # OUTPUT DATA BLOCK ABH         #
        ABHWORD [0] = 0;               # CLEAR WHOLE ABH WORD          #
        ABHABT [0]  = APPQMSG;         # BLOCK TYPE IS *MSG*           #
        ABHACT [0]  = CT8ASCII;        # CHARACTER TYPE IS 8-BIT ASCII #
  
# 
****  INITIALIZE FIXED FIELDS IN THE OUTPUT SUPERVISORY MESSAGE ABH.
# 
  
        P<ABH> = LOC(SABH);            # OUTPUT SUPERVISORY MSG ABH    #
        ABHWORD [0] = 0;               # CLEAR WHOLE ABH WORD          #
        ABHABT [0]  = APPCMD;          # BLOCK TYPE IS *CMD*           #
        ABHACT [0]  = CT60TRANS;       # CHARACTER TYPE IS 60-BIT XPT  #
  
        UDP$VERSION [0] = UDPVERS$;    # INITIALIZE UDP CALL HEADER    #
        UDP$NOTUSED [0] = 0;           # CLEAR UNUSED BYTE             #
  
        NUMACN = 0;                    # OUTSTANDING CONNECTIONS       #
  
        END                            # NAM AVAILABLE                 #
  
      RETURN;                          # RETURN TO CALLER              #
  
      END                              # IPPBEGN                       #
  
      TERM