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1993-11-23
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NOVELL TECHNICAL INFORMATION DOCUMENT
TITLE: WINSOCK (LWP for DOS and LAN WorkGroup)
DOCUMENT ID: TID200009
DOCUMENT REVISION: B
DATE: 23NOV93
ALERT STATUS: Yellow
INFORMATION TYPE: Symptom Solution
README FOR: LWP168.EXE
NOVELL PRODUCT and VERSION:
LAN WorkPlace for DOS 4.1
LAN WorkGroup 4.1
ABSTRACT:
This patch adds support for Windows Sockets to LAN WorkPlace for DOS and LAN
WorkGroup v4.1. Windows Sockets is an open interface for programming TCP/IP
applications for Microsoft Windows.
──────────────────────────────────────────────────────────────────────────────
DISCLAIMER
THE ORIGIN OF THIS INFORMATION MAY BE INTERNAL OR EXTERNAL TO NOVELL. NOVELL
MAKES EVERY EFFORT WITHIN ITS MEANS TO VERIFY THIS INFORMATION. HOWEVER, THE
INFORMATION PROVIDED IN THIS DOCUMENT IS FOR YOUR INFORMATION ONLY. NOVELL
MAKES NO EXPLICIT OR IMPLIED CLAIMS TO THE VALIDITY OF THIS INFORMATION.
──────────────────────────────────────────────────────────────────────────────
SYMPTOM
You should have already installed LAN WorkPlace for DOS or LAN WorkGroup
v4.1 to use this WinSock release, or have otherwise obtained and
installed the Novell TCP/IP Transport for DOS/MS Windows (found in
various Novell and 3rd-party networking software packages). With these
files you will be able to run 3rd-party applications writtenspecifically
for the WinSock API.
SOLUTION
Apply LWP168.EXE
Self-Extracting File Name: LWP168.EXE Revision: B
Files Included Size Date Time
\
LWP168.TXT (This File)
WINSOCK.DLL 34640 11-12-93 10:20a
NOVASYNC.EXE 4672 09-28-93 5:00p
WLIBSOCK.DLL 43530 09-28-93 5:00p
TCPIP.EXE 41188 09-28-93 5:00p
SNMP.EXE 32374 09-28-93 5:00p
LWPCON.EXE 257504 09-28-93 5:00p
LWPCON.HLP 44238 09-28-93 5:00p
LWPCON.MSG 14334 09-28-93 5:00p
WGTCPIP.EXE 65348 09-28-93 4:47p
Installation Instructions:
Execute the self-extracting file LWP168.EXE. Copy the extracted files to
the LAN WorkPlace BIN directory. The default LAN WorkPlace BIN directory
is C:\NET\BIN. Be sure that the WINSOCK.DLL and WLIBSOCK.DLL in this
directory are the only ones in your path; having others in \WINDOWS or
\WINDOWS\SYSTEM will cause problems.
The WINSOCK.DLL relies on the WLIBSOCK.DLL, NOVASYNC.EXE, and TCPIP.EXE
if you are using LAN WorkPlace for DOS or WGTCPIP.EXE if you are using
LAN WorkGroup provided in this patch. We have included updated versions
of SNMP.EXE and LWPCON.EXE only because earlier versions of these files
are not compatible with the TCPIP.EXE or WGTCPIP.EXE we are providing in
this patch. WINSOCK does not rely on SNMP.EXE or LWPCON.EXE.
Solution Specifics:
Development with WINSOCK requires the WINSOCK.H file and the WINSOCK v1.1
specification also an import library of WINSOCK.DLL must be created. The
WINSOCK.H file and WINSOCK v1.1 specification can be obtained at the
Internet address
sunsite.unc.edu:/pub/micro/pc-stuff/ms-windows/winsock/winsock-1.1 .
The following list identifies features of Windows Sockets that are
unsupported or supported differently by Novell LAN WorkPlace for DOS:
o MSG_PEEK is ignored on recv or recvfrom.
o MSG_DONTROUTE is ignored on send or sendto.
o The following socket control options are not supported and return
WSAEINVAL if used:
- SIOACATMARK
o The following notes refer to Table 1, which summarizes handling of
socket options:
The following socket options default to TRUE and can not be changed to
FALSE:
- SO_BROADCAST
- SO_DONTLINGER
- SO_OOBINLINE
The following socket options default to FALSE and can not be changed to
TRUE:
- SO_DEBUG
- SO_DONTROUTE
- SO_ERROR
o Since SO_OOBINLINE is always true, specifying MSG_OOB on recv or
recvfrom has no effect. Out-of-band data is always received as normal
data. Out-of-band data may be sent.
o The maximum number of sockets supported is 31.
o You can create sockets of type SOCK_RAW using the socket function. The
supported functions for raw sockets are:
- socket
- ioctlsocket to set non-blocking mode
- sendto
- recvfrom
- closesocket
Raw sockets are supported only for ping. The application is responsible
for building and processing ICMP headers.
o Either do not use shutdown() at all, or use shutdown() only when
preparing to terminate communications (for example, to close the socket).
o If you use shutdown() to disable sending, LAN WorkPlace TCP/IP sends a
FIN packet. An application should not issue a send() or sendto() after a
shutdown() that disabled sending.
o An application should not issue a recv() or recvfrom() after a
shutdown() that disabled receiving.
o Table 1. Handling of Socket Options
------------------------------------
+-------------------------------------------------+
| Option Default Setsockopt Support |
+-------------------------------------------------+
| SO_RCVBUF 4096 yes |
+-------------------------------------------------+
| SO_SNDBUF 4096 yes |
+-------------------------------------------------+
| SO_ACCEPTCONN FALSE NOPROTOOPT |
+-------------------------------------------------+
| SO_BROADCAST TRUE NOPROTOOPT if chg |
+-------------------------------------------------+
| SO_DONTLINGER TRUE NOPROTOOPT if chg |
+-------------------------------------------------+
| SO_OOBINLINE TRUE NOPROTOOPT if chg |
+-------------------------------------------------+
| SO_DEBUG FALSE NOPROTOOPT if chg |
+-------------------------------------------------+
| SO_DONTROUTE FALSE NOPROTOOPT if chg |
+-------------------------------------------------+
| SO_ERROR FALSE NOPROTOOPT if chg |
+-------------------------------------------------+
| SO_TYPE none NOPROTOOPT |
+-------------------------------------------------+
| SO_KEEPALIVE FALSE yes |
+-------------------------------------------------+
| SO_REUSEADDR FALSE yes |
+-------------------------------------------------+
| TCP_NODELAY not supp NOPROTOOPT |
+-------------------------------------------------+
| SO_LINGER not supp NOPROTOOPT |
+-------------------------------------------------+
Getsockopt for TCP_NODELAY and SO_LINGER return NOPROTOOPT. The other
options are supported.