File: AAA_UCXSIM_README.TXT 28-Feb-1999
By John Malmberg
UCXSIM_IPC_SHR.EXE is a shared image for use with Open CMU-IP.
It allows some binary programs that were linked to run socket routines in the
DEC C RTL.
Not all functions will will work. This is limited by the capabilities of the
Open CMU-IP. A detailed list of what can not be expected to work is below.
This program does not provide $QIO/$QIOW compatability with UCX. Nor does it
provide BG: device emulation.
This program also requires NETLIB 2.0 or higher. Note: It has only been tested
with NETLIB 2.0 and 2.2. This is important because UCXSIM_IPC_SHR uses
information not documented in NETLIB, but determined from examining the source.
If a future version of NETLIB changes the socket context structure, then UCXSIM
may stop working.
The UCXSIM_IPC_SHR.EXE is copied to the CMUIP_ROOT:[SYSLIB] directory and
installed as an /OPEN/HEADER/RESIDENT image.
The files NETWORKS., PROTOCOLS., and SERVICES, need to be copied to the
CMUIP_ROOT:[SYSLIB] directory. Note the PROTOCOLS. and SERVICES. files are the
same as in Eckart Meyer's SOCKETSHR program.
The following logical names need to be defined.
DEFINE/SYSTEM/EXEC UCX$IPC_SHR CMUIP_ROOT:[SYSLIB]UCXSIM_IPC_SHR.EXE
DEFINE/SYSTEM/EXEC UCXSIM_NETWORKS CMUIP_ROOT:[SYSLIB]NETWORKS.
DEFINE/SYSTEM/EXEC UCXSIM_PROTOCOLS CMUIP_ROOT:[SYSLIB]PROTOCOLS.
DEFINE/SYSTEM/EXEC UCXSIM_SERVICES CMUIP_ROOT:[SYSLIB]SERVICES.
This program is basically an interface between DECC$SHR and NETLIB. Except for
the select() function and the database routines. The select() function is
implemented as a 20 millisecond poll of all of the input sockets. The
database routines were implemented to be compatable with SOCKETSHR.
Functions implmented:
socket()
decc$get_sdc()
bind()
listen()
gethostbyname()
connect()
getsockopt() ! NETLIB documents this as non functional
setsockopt() ! NETLIB documents this as non functional
getpeername()
getsockname()
send() ! flags are ignored, as unsupported for NETLIB
select() ! 20 millisecond poll on receive sockets.
! All send sockets are assumed to be ready.
! Exception sockets are ignored.
recv() ! flags are ignored.
write()
read()
sendto() ! flags are ignored.
recvfrom() ! flags are ignored.
sendmsg() ! flags are ignored.
recvmsg() ! flags are ignored.
shutdown()
close()
inet_addr()
gethostbyaddr()
gethostaddr()
gethostname()
ntohl() ! Supplied by DEC C RTL
getnetbyaddr()
getnetbyname()
getnetent() ! Returns NULL always.
getprotobyname()
getprotobynumber()
getprotoent() ! Returns NULL always.
getservbyname()
getservbyport()
htons() ! Supplied by DEC C RTL
htonl() ! Supplied by DEC C RTL
ntohl() ! Supplied by DEC C RTL
ntohl() ! Supplied by DEC C RTL
inet_lnaof()
inet_netof()
inet_makeaddr()
inet_network()
inet_ntoa()
Note:
With the advent of the Hobbyist 2 program from Compaq and DECUS, I will
probably not be doing anymore work with CMU-IP for a while.
I am interested in any use of this program, but will not be able to test any
fixes given to me.
-John
WB8TYW@QSL.NET
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