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Text File | 1992-07-08 | 30.3 KB | 894 lines

Waterloo TCP Installation Notes by Erick Engelke Introduction Introduction TCP/IP is not a program, it is a set of protocols which have been implemented on many machines. All machines running an implementation of TCP/IP and connected to the world wide Internet are capable of communicating with each other. There are several popular non-commercial TCP/IP implementations for MS-DOS computers. Each offers special features but with varied drawbacks. I don't believe there is a clear choice of one implementation for all needs, but users are free to pick the best or most useful applications from each offering. These notes describe the various applications available today. Please remember that the applications are free software, you may use them and pass them on to others, but there is no warranty and the support is very limited. You also may not sell the included programs. Installation Installation Waterloo TCP only works if you have a packet driver, a special program which allows your network interface card to talk with the Waterloo TCP applications. Thanks to some very generous people, particularly Russell Nelson, you probably will not have to buy a packet driver. If you are using Ethernet hardware you can probably find free packet drivers for your cards via anonymous ftp to sun.soe.clarkson.edu in the pub/drivers subdirectory. ____________________ ___________ Waterloo TCP only supports Class 1 drivers. Officially these are called Ethernet class drivers, but many other types of networks have drivers which make them emulate Ethernet hardware. For example, any Novell system using IPX or any IBM compatible Token Ring network can be made to act like Ethernet. Even serial lines (SLIP) emulate Ethernet if you use Michael Martineau's ETHERSLIP driver available by anonymous ftp from owl.nstn.ns.ca in in.coming/etherslip. ______________ ___________________ To start using Waterloo TCP software you will need to get it configured. There are two options, using BOOTP or a configuration file. If you think you may have a BOOTP server on your local subnet, copy the file TCPINFO.EXE into a new subdirectory and run the command TCPINFO. It may take a few seconds. After a maximum of 30 seconds, TCPINFO should tell you if it could get configured via BOOTP. If it could not, or BOOTP is too slow, you will have to use a configuration file. You will probably want a configuration file anyways, as it allows some extra things which are not inherent in BOOTP. Waterloo TCP lets you use a config file, and pick up extra things from BOOTP. If you don't really know what you are doing, continue on with this section and make a config file. First you will need some important information from you local TCP/IP guru. Do not merely guess, these values must be correct or you may do some damage and get yourself on the death threat list from your local network people. IP address (eg. 4.1.2.23) my_ip = ______.______.______.______ local subnet mask (eg. 255.255.254.0, never 255.255.255.255) netmask = ______.______.______.______ local gateway (eg. 4.1.2.1) gateway = ______.______.______.______ primary name server (eg. 129.97.128.1) nameserver = ______.______.______.______ alternate name servers (up to 9 more if so desired) just keep repeating this line with new addresses. nameserver = ______.______.______.______ name domains list, (eg. UWaterloo.ca or edu) d o m a i n s l i s t = __________________________________________________ These values must be placed in a file called WATTCP.CFG. Below is a sample copy, remember, do not use my values, get the correct ones! print="using sample configuration" # sample comment print="contact local network guru for more details" my_ip=129.97.176.99 netmask=255.255.254.0 # sample comment nameserver=129.97.128.24 ; sample comment nameserver=129.97.128.196 # alt nameserver nameserver=129.97.128.1 # 3rd nameserver gateway=129.97.176.1 domainslist="uwaterloo.ca" The rules are simple, directive=value. If quotes are not used in the value field, the value will be terminated by the start of a comment or by a newline, and all white space (spaces and tabs) are removed. If you specify quotes around the value, only a second set of quotes or a newline will end the value field and comments must be preceded by an end quote mark. Whitespace is preserved inside quotes. Place the WATTCP.CFG file in the same subdirectory as the TCP application programs. If the file is not found there the programs automatically look for the file in the current subdirectory of the current disk. Failing that, a message will be displayed but the program will not necessarily abort. You may override the above directory choices by explicitly setting the path in an environment variable. eg. set wattcp.cfg=n:\internet The environment variable is checked first, and if it is defined that configuration file is used. This is particularly useful on installations where the software is located on a fileserver, but individual workstations will need separate configuration files. Testing Testing First, to ensure that you entered all the parameters correctly, run TCPINFO. It will list all system constants. If one or more of them seem incorrect, check your spelling in the WATTCP.CFG file. Next we will test the PING command to see that everything works and asks another computer if it is up. The first argument to PING is the name of the other computer. The second argument is the number of retries. Since your guru supplied the ip address of a gateway, we will first try that. ping 129.97.128.1 5 don't use 129.97.128.1, use your gateway's IP address This will generate five attempts. You should have more than 0 % success. Otherwise your gateway is down or your ip address or gateway is wrong. If you had success, try pinging the ip address of your nameserver. eg. ping 129.97.128.196 5 Now check your nameserver by trying to resolve the name of a local machine. Near me is a machine named 'cupid'. ping cupid 5 If that did not work, your various nameserver entries are incorrect, your gateway or network mask is incorrect, your nameservers did not want to provide name service, or you did not specify a valid name. These tests will help your guru figure out what might be wrong. Applications Applications TCPINFO TCPINFO Displays the current Ethernet/TCP configuration. It is useful for testing spelling and contents of files and for determining ethernet addresses. PING PING PING [-d|/d] [-s|/s] hostname [attempts] You have already seen PING described briefly in the installation section. PING will not generate more than one request per second, it also attempts to block broadcast attempts. PING can be used in a debugging mode (-d or /d). eg. PING -d 129.97.128.1 If you do not specify the number of attempts to be made, only one attempt will be made. eg. PING 129.97.128.196 Specifying /s will ping the other machine once per second for a very long time. eg. PING -s 129.97.128.196 COOKIE COOKIE COOKIE [host] eg. COOKIE COOKIE conehead.uwaterloo.ca Print a witty saying from one of the cookie servers. DAYTIME DAYTIME Print the time of day using TCP DAYTIME host eg. DAYTIME 129.97.128.1 DAYTIME watmath.uwaterloo.ca If the host supports TCP based DAYTIME text services, the time of day will be displayed as a text string. See also NTIME FINGER FINGER Determine user or system information FINGER [user]@host eg. FINGER erick@sunee.uwaterloo.ca FINGER @sunee.uwaterloo.ca Finger returns the remote computer's information on a particular user. If no user is specified, FINGER will return the names of currently logged users on that machine. LPR LPR Spool print jobs LPQ LPQ Query the print queue Run these commands with no arguments for the exact syntax. Check to see that the appropriate host privileges are extended to the pc. An explanation beyond this is beyond the scope of this brief document, see your local UNIX guru with HOSTS.LPR or whatever s/he feels is appropriate. NTIME NTIME Set DOS time from the Network. NTIME host [addminutes] NTIME contacts the host and requests the current time. Computers are supposed to respond with the number of seconds since Jan 1, 1900 GMT. Many simply return the current time adjusted to the daylight savings time and time zone. I allow you to specify addminutes if you need to add or subtract a certain number of minutes to the returned time. I was considering using a DST conversion algorithm but have not yet done so. TCPPORT TCPPORT Treat the serial port as a TCP connection TCPPORT host port "program options" Host is the name or ip address of the remote computer and port is the TCP port number on that computer. You may specify the terminal emulation desired by setting the environment variable set tcpterm=termtype eg. set tcpterm=vt102 See the section on TCPPORT below REXEC REXEC Execute the following command on a remote host REXEC host [user [pass]] cmd The "cmd" command will be executed on the remote computer. If you fail to specify either the password or the userid, you will be prompted for them. eg. rexec hq.iraq "ls -l" rexec hq.iraq saddam "ls -l" rexec hq.iraq saddam white_flag_of_victory "ls" REXEC does not do terminal interpretation, you may wish to have NANSI.SYS loaded to provide the necessary emulation. Waterloo TCP REXEC is good when you wish to redirect output to a file. Other WATTCP Programs Other WATTCP Programs The above programs are relatively simple demonstrations of the capabilities of the WATTCP TCP/IP kernal. Advanced programs are usually distributed separately as they tend to be updated in a different schedule from the kernal libraries. MSKERMIT 3.11 MSKERMIT 3.11 One of the first popular uses for WATTCP was its ability to make communication programs such as MSKERMIT act like TELNET facilities. So overwhelming was the number of requests that MSKERMIT 3.11 now includes a derivative of the WATTCP kernal and the TCPPORT application. TELNETD TELNETD The next most popular use is easily TELNETD, a program which allows you to TELNET into your pc and control it using any TELNET program on any computer platform. TELNETD can be found via anonymous ftp to sunee.uwaterloo.ca in pub/wattcp/telnetd.zip. Using Communications Programs with TCPPORT Using Communications Programs with TCPPORT You may wish to use a terminal communication program rather than TELNET. Waterloo TCP makes this very easy to do with its TCPPORT program. Now that TCPPORT is built into MSKermit I don't really have a good example, but here goes: Start by creating a configuration file which tells your com program to use the BIOS ports rather than hardware. Then create a batch file which looks like: TNCOMM.BAT echo off tcpport %1 23 "c:\comm" Here I was assuming you kept comm.exe in the root of C: and tcpport could be found somewhere in the path. Now you can easily TELNET to any host by typing: TNCOMM host eg. TNCOMM 129.97.128.1 or TNCOMM watmath.uwaterloo.ca After you log off, Waterloo TCP returns the characters forming [??Host closed connection??] or some similar message. You simply need to exit your com program. Exiting kermit without logging off will simply close the connection and typically log you off. You may select a specific terminal emulation which TCPPORT should try to run by setting the tcpterm environment variable before running tcpterm: eg. set tcpterm=vt102 Advanced WATTCP.CFG Options Advanced WATTCP.CFG Options This section is useful once you have determined that Waterloo TCP actually works for you. Including Sub-Config Files You may wish to use a combination of generic WATTCP.CFG file and a smaller sub-config file which will be located on the user's private subdirectory. Any command which can be placed in the main config file may also be placed (or replaced) in the sub-command file. eg. include = c:\local.cfg After the subcommand file is parsed, Wattcp returns to the main config file. The depth of this system is limited by the number of file handles and the stack size. If the subcommand file cannot be found, an error message will be printed. To allow for the possible, but not-essential existance of a file (i.e., include it if it is there, but don't complain otherwise) you may simply prepend the filename with a question mark. eg. include = ?c:\local.cfg IP Addresses Most network administrators would prefer to not have many copies of the configuration file, but rather a single file from which everyone can be easily configured. As demonstrated above, Waterloo TCP normally accepts the ip number from within the WATTCP.CFG file. BOOTP Many sites prefer to use BOOTP, a standard protocol which requests the user's ip address and other information from a BOOTP server. To use BOOTP, you must specify the name 'bootp': my_ip = bootp in the config file. This will broadcast the request on the local subnet. You may specify a specific BOOTP server which need not be on the same subnet, by using: bootp = host eg. bootp = 129.97.128.1 The default timeout value is 30 seconds. You may change that by using: bootpto = seconds eg. bootpto = 50 If no WATTCP.CFG file is found, Waterloo TCP programs always resort to BOOTP. ETHERNET to IP Table Another option currently exists, I allow multiple IP numbers in WATTCP.CFG with each one being tied to a particular Ethernet address. If your Ethernet address is found in list, your IP address will be assigned. ETHIP=ethaddr,ipaddr eg. ETHIP=00:01:2F:BC:44:33,128.252.35.4 In this case, the machine with Ethernet address 00:01:2F:BC:44:33 would be assigned the ip address 128.252.35.4. Note that Ethernet addresses are hexadecimal with intermediate colons, ip addresses are dotted decimal, and I use a comma to separate the two. Also, since Waterloo TCP removes white space, you may place a space between any of the fields if you don't use quotes, and you may end the line with a comment describing where the station lives or to whom it belongs. You can quickly find the Ethernet address of a station by running the TCPINFO command. Subnets The Internet is comprised of many, many subnets. There are several protocols normally used to help computers reach computers on other subnets. Most PC based TCP kernals depend on routing tables to manage the possible routes, so I elected to use that strategy. A routing table exists in memory with a current capacity for 12 different routes. Each route must specify a gateway, an optional destination subnet, and then an optional subnet mask. gateway = gate_ip [, subnet [, subnet_mask ]] eg. gateway = 129.97.176.1 # default eg. gateway = 129.97.176.2, 129.97.0.0, 255.255,0,0 The first example shows how a default gateway is created. A default gateway is used if no other choices exist. The second example shows how to specify a gateway for a particular subnet. In this example, whenever the 'top' 16 bits are 129.97, that gateway will be used. Yes, you need not always specify the mask, but it is necessary for class B subnets, so I simply suggest that you always do specify the mask. You may specify the same gateway several times with different routes. Non-contiguous subnet bits are supported. To check your configuration and to see the precedence of gateways, run TCPINFO.EXE. Host Name Some applications will wish to know your PC's name, a short textual name. This may be set with the WATTCP.CFG line: hostname = name eg. hostname = mole Notice that you do not specify the domain, that is found from the domain string. Timeouts Most Waterloo TCP programs have a specified timeout value between activity before a timeout error occurs. For example, the maximum response time to an open request before the connection is given up should be reasonably long so that distant connections will be usable, but short enough that the user will not believe the computer has hung. Applications may specify their own timeout value, but if they chose to use the system default (all my applications do), the default value may be set from the WATTCP.CFG file. SOCKDELAY=seconds eg. SOCKDELAY=40 The default value is 30 seconds. A smaller value is unwise, but larger values may be necessary for particularly bad connections. Maximum Segment Size If you understand MSS and know what you would like, you can change it: MSS=bytes eg. MSS=512 Cookie Server You may specify a cookie server in the WATTCP.CFG file with the line: cookie = server eg. cookie = 129.97.128.1 eg. cookie = sunee.uwaterloo.ca Up to 10 separate cookie servers may be added. TCPINFO will list them all. BOOTP will also add cookie servers. BOOTP Features and Limitations BOOTP is not the greatest method of configuration. In fact there is currently a committee looking at implementing its successor. Waterloo TCP programs will automatically get many configuration parameters from the BOOTP server if those values are returned: IP address subnetmask gateway (only one will be added) nameservers (all supplied will be added) cookieservers (all supplied will be added) hostname The domain name cannot be specified currently. Of the gateways, only one is recorded by Waterloo TCP as they do not indicate subnets or anything else useful. Notes: Notes: The most up-to-date versions of these files, their sources, and new programs are available on Sunee.uwaterloo.ca by anonymous FTP. Check out pub/wattcp. All executables there are copyrighted but are freely available for use and non-commercial distribution. The library files which do the actual tcp communications are also there. They too are copyrighted, but may be used in commercial and non-commercial work. You are free to do as you choose. If you intend to program with this package, I would highly recommend the developers manual described below. Developers may wish to join the Waterloo TCP mailing list, join by mailing to: wattcp@Development.Watstar.UWaterloo.ca The programmers manual includes examples, a full reference of the approximately 50 functions, notes on conversions from UNIX. The cost is $40 ($US if you live in USA, $Cdn if you live in Canada. $40 US for anywhere else. Make check or money order payable to : Erick Engelke 1010-130 Lincoln Rd. Waterloo, Ont., Canada N2J-4N3 The proceeds are entirely used to offset the cost of my manuals and software costs necessary for improving the package. The next step is Windows DLL's, but I cannot afford everything I need to do that. I have mentioned the public domain CUTCP and NCSA programs which do an excellent job of TELNET, RSH with VT100 emulation, and much more. You may wish to compare the programs and use the ones which work best for you. For their executables, use anonymous ftp to: omnigate.clarkson.edu 128.153.4.2 for CUTCP and ???? 128.174.20.50 for NCSA I hope that this distribution helps you in some way, and I'd like to thank the contributors, Bruce Campbell who wrote the original program from which tcpport was derived. He also wrote the DOS network I log onto every morning. Tim Krauskopf's NCSA Name Domain code was used to develop Waterloo TCP's resolve function. Edmund J. Sutcliffe donated a good portion of BOOTP. Jim Martin made a lot of extensions to Edmund's BOOTP work and was influential in the new nameserver and new gateway code as well as the COOKIE stuff. Jason Dent found some bugs and helped optimize WATTCP's performance. Dean Roth found some low level bugs and greatly improved the FTP program. Although countless others have given me good ideas and noticed an incorrect line here or there, but none have been more thorough or helpful than Tarjei Jensen. If you would like to add your name to the programmers list, send me a copy of your program and I'll gladly include it in the distribution with full credit. Erick Engelke Erick@development.watstar.uwaterloo.ca Waterloo TCP Architect July 8, 1992