This is fix 6. It should solve several TCP/IP problems. It also
provides support for MultiNet on AXP platforms.

a) There are several inconsistencies in the return codes (errno)
from the UCX socket routines between UCX versions and with UNIX.
However, the variable vaxc$errno seems to return consistent in-
formation. In my first version I only checked errno which was
normally "correct" for UCX 3.0 on an AXP. However, many people
reported duplicate accesses to servers, problems when authorization
was used etc. This should be working correctly for all UCX versions
after applying the present patches.

One minor problem remains to solved for UCX, to set the socket
non-blocking. I have code working for this with VAX-UCX, but
unfortunately there are still some problems on AXP-UCX. I have
therefore simply ignored these calls for now. The corresponding
status messages are also commented away.

b) In my original port I had not tested MultiNet on AXP. This
turned out to be very tricky, probably due to my ignorance. If
you see an easier way than mine, please tell me. Many thanks to
Frederic Hemmer of CERN-CN who pointed me in the right direction.

These patches are rather lengthy, unfortunately. Instead of applying
the diffs below you can get Mosaic-2.0.VMS.Fix-6.tar.Z and unpack
the changed files from this archive.

14-Dec-1993
===============================================================
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]DESCRIP.MMS;2
   31   .IFDEF AXP
   32   CDEFS = /Prefix=ANSI/Define=MULTINET
   33   .ELSE
   34   CDEFS = /Define=MULTINET
   35   .ENDIF
   36   .ELSE
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]DESCRIP.MMS;1
   31   CDEFS = /Define=MULTINET
   32   .ELSE
************

Number of difference sections found: 1
Number of difference records found: 5

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
   34   #if defined(VMS) && !defined(MULTINET)
   35   #define FD_SETSIZE 32
   36   #else
   37   #define FD_SETSIZE 256
   38   #endif /* Limit # sockets to 32 for UCX, BSN */
   39   #endif
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
   34   #define FD_SETSIZE 256
   35   #endif
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
  370   #ifndef VMS
  371       if (ret == -1)
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
  366       if (ret == -1)
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
  376   #endif /* For now until non-blocking works for UCX, BSN */
  377     }
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
  371     }
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
  458   #ifndef VMS
  459                 if ((status < 0)&&(errno == EISCONN))
  460   #else
  461   /*
  462    * A UCX feature: Instead of returning EISCONN UCX returns EADDRINUSE.
  463    * Test for this status also.
  464    */
  465                 if ((status < 0)&&((errno == EISCONN)||(errno == EADDRINUSE)))
  466   #endif /* VMS, UCX, BSN */
  467   #else
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
  452                 if ((status < 0)&&(errno == EISCONN))
  453   #else
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
  491   #ifndef VMS
  492                 if ((status < 0)&&(errno != EALREADY)&&(errno != EISCONN))
  493   #else
  494   /*
  495    * UCX pre 3 apparently returns errno = 18242 instead of any of the
  496    * EALREADY or EISCONN values.
  497    */
  498                 if ((status < 0)&&(errno != EALREADY)&&(errno != EISCONN)&&
  499                   (errno != 18242))
  500   #endif /* UCX, BSN */
  501   #else
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
  477                 if ((status < 0)&&(errno != EALREADY)&&(errno != EISCONN))
  478   #else
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
  539   #ifndef VMS
  540         if (ret == -1)
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
  516         if (ret == -1)
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
  545   #endif /* For now until non-blocking works for UCX, BSN */
  546       }
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
  521       }
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
  565   #ifdef VMS
  566     int nb;
  567   #endif /* VMS, BSN */
  568
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
  540
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;3
  601   #ifndef VMS
  602     return read (fildes, buf, nbyte);
  603   #else
  604     nb = read (fildes, buf, nbyte);
  605   /*
  606    * A vaxc$errno value of 8428 (SS$_LINKDISCON) indicates end-of-file.
  607    */
  608     if ((nb <= 0) && (errno != ECONNRESET) && (vaxc$errno == 8428)) nb = 0;
  609     return nb;
  610   #endif /* UCX, BSN */
  611   #else
  612     nb = socket_read (fildes, buf, nbyte);
  613     return nb;
  614   #endif /* MULTINET, BSN */
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]HTTCP.C;2
  573     return read (fildes, buf, nbyte);
  574   #else
  575     return socket_read (fildes, buf, nbyte);
  576   #endif /* MULTINET, BSN */
************

Number of difference sections found: 9
Number of difference records found: 44

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]TCP.H;3
  179   #ifdef __Alpha_AXP
  180   #define read  decc$read
  181   #define write decc$write
  182   #define close decc$close
  183   #define sleep decc$sleep
  184   #endif /* AXP, BSN */
  185
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]TCP.H;2
  179
************
************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]TCP.H;3
  202
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBWWW2]TCP.H;2
  196   #ifndef NotBSN
  197   #undef NETREAD
  198   #define NETREAD read
  199   #endif /* BSN for now */
  200
************

Number of difference sections found: 2
Number of difference records found: 10

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBHTMLW]DESCRIP.MMS;2
   31   .IFDEF AXP
   32   CDEFS = /Prefix=ANSI/DEFINE=(MOTIF,XMOSAIC,MULTINET)
   33   .ELSE
   34   CDEFS = /DEFINE=(MOTIF,XMOSAIC,MULTINET)
   35   .ENDIF
   36   .ELSE
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBHTMLW]DESCRIP.MMS;1
   31   CDEFS = /DEFINE=(MOTIF,XMOSAIC,MULTINET)
   32   .ELSE
************

Number of difference sections found: 1
Number of difference records found: 5

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBHTMLW]HTMLJOT.C;3
   70   #if defined(__TIME_T) && !defined(__TYPES_LOADED) && !defined(__TYPES)
   71   #define __TYPES_LOADED
   72   #endif /* Different defs in OpenVMS and MultiNet include files, BSN */
   73   #include "multinet_root:[multinet.include.sys]types.h"
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.LIBHTMLW]HTMLJOT.C;2
   70   #include "multinet_root:[multinet.include.sys]types.h"
************

Number of difference sections found: 1
Number of difference records found: 3

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.SRC]DESCRIP.MMS;2
   36   .IFDEF AXP
   37   CPREF = /Prefix=ANSI
   38   .ELSE
   39   CPREF =
   40   .ENDIF
   41   .IFDEF DEBUG
   42   CDEFS =$(CPREF)/Define=($(VMS_DEFS)MULTINET,DEBUGVMS)
   43   .ELSE
   44   CDEFS =$(CPREF)/Define=($(VMS_DEFS)MULTINET)
   45   .ENDIF
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.SRC]DESCRIP.MMS;1
   36   .IFDEF DEBUG
   37   CDEFS =/Define=($(VMS_DEFS)MULTINET,DEBUGVMS)
   38   .ELSE
   39   CDEFS =/Define=($(VMS_DEFS)MULTINET)
   40   .ENDIF
************

Number of difference sections found: 1
Number of difference records found: 9

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.SRC]GUI.C;3
   69   #if defined(__TIME_T) && !defined(__TYPES_LOADED) && !defined(__TYPES)
   70   #define __TYPES_LOADED
   71   #endif /* Different defs in OpenVMS and MultiNet include files, BSN */
   72   #include "multinet_root:[multinet.include.sys]types.h"
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.SRC]GUI.C;2
   69   #include "multinet_root:[multinet.include.sys]types.h"
************

Number of difference sections found: 1
Number of difference records found: 3

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.SRC]MO-WWW.C;3
   66   #ifdef MULTINET
   67   #if defined(__TIME_T) && !defined(__TYPES_LOADED) && !defined(__TYPES)
   68   #define __TYPES_LOADED
   69   #endif /* Different defs in OpenVMS and MultiNet include files, BSN */
   70   #endif /* MULTINET, BSN*/
   71   #include "tcp.h"
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.SRC]MO-WWW.C;2
   66   #include "tcp.h"
************

Number of difference sections found: 1
Number of difference records found: 5

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0.SRC]MOSAIC.H;4
   79   #if defined(MULTINET) && defined(__Alpha_AXP)
   80   #define getpid  decc$getpid
   81   #define getcwd  decc$getcwd
   82   #define stat    decc$stat
   83   #define cuserid decc$cuserid
   84   #define mkdir   decc$mkdir
   85   #endif /* Some non-ANSI routines need a prefix */
   86   #endif /* VMS, BSN */
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0.SRC]MOSAIC.H;3
   79   #endif /* VMS, BSN */
************

Number of difference sections found: 1
Number of difference records found: 7

************
File PD_ROOT:[MOSAIC.MOSAIC-2_0]MAKE_MOSAIC.COM;2
   37   $ If IP .EQS. "MULTINET" .AND. Platform .EQS. "Alpha" Then -
   38      COpt = COpt + "/PREFIX=ANSI"
   39   $ If F$Locate("DEB",Args) .NE. F$Length(Args) Then Show Symbol/Local *
******
File PD_ROOT:[MOSAIC.MOSAIC-2_0]MAKE_MOSAIC.COM;1
   37   $ If F$Locate("DEB",Args) .NE. F$Length(Args) Then Show Symbol/Local *
************

Number of difference sections found: 1
Number of difference records found: 2
.