JANUS DEFINE

Define and set characteristics of a Janus port

Overview

The JANUS DEFINE command is used to specify the characteristics of a Janus port. It defines the usage of the named port as one of the following:

• Access by IFDIAL clients
• Open Server or Open Client connections
• Specialty Data Store access
• Web access
• FTP server connections
• Telnet server connections
• Generic Sockets usage — with the Model 204 online either requesting (CLSOCK) or accepting (SRVSOCK) the connection
• Generic UDP Sockets usage — with the Model 204 online either initiating (CLSOCKU) or accepting (SRVSOCKU) the exchange of messages.
• Connection between the Janus Debugger or TN3270 Debugger workstation GUI and programs being debugged in Model 204

For any except a CLSOCK or DEBUGGERCLIENT port, this subcommand associates a service with a TCP/IP port number.

Among the characteristics specified by JANUS DEFINE is whether the port will use Secure Sockets Layer (SSL) for encrypted communications.

See Defining server ports for connectivity background information and information about when you need to issue the JANUS DEFINEREMOTE command.

The JANUS DEFINE command syntax is described below.

Syntax

JANUS DEFINE portname portnum type maxcon other_parms ...

Where each of the first four parameters is positional and required:

portname	A 1- to 30-character name by which the port is identified. It is used on other JANUS subcommands, such as JANUS START and JANUS DISPLAY. It is used on the $Sock_Conn function or the Socket object New constructor to name the CLSOCK port defining a connection.
portnum	The TCP/IP port number at which the service is available. portnum is the server port number, and it must be between 1 and 65535, inclusive. This number is used by client applications on the network when they require access to the Model 204 server. The server port number must be unique on the host. Several "well-known" port numbers for various TCP/IP services (for example, 53 for nameserver) should be avoided, unless you are implementing that service using Janus Sockets. For CLSOCK and DEBUGGERCLIENT ports, an asterisk (*) is used as the port number, since they are used to create, rather than accept, connections, and these port numbers are not determined until the time of the connection. For WEBSERV ports, 80 is customary for non-secure HTTP and 443 for secure HTTP (SSL); you can, however, use other numbers for WEBSERV ports if required. For FTPSERVER ports, 21 is customary; you can, however, use other numbers for FTPSERVER ports if required.
type	Port type. Valid types are: 2PC A Janus Two-Phase Commit port. CLSOCK A Janus Sockets client socket port. If non-system administrator users are to use a CLSOCK port, rules must be provided to allow them to initiate outgoing connections on the port. CLSOCKU A Janus Sockets UDP client port. If non-system administrator users are to use a CLSOCKU port, rules must be provided to allow them to initiate outgoing connections on the port. A CLSOCKU port can also be used to implement a UDP server on a single Model 204 thread. Only available in Sirius Mods Version 8.0 and later. DEBUGGERCLIENT A Sirius Debugger client socket port. DEBUGGERSERVER A Janus Debugger or TN3270 Debugger server socket port. FTPSERVER A Janus FTP Server application. IFDIAL Janus IFDIAL Library applications. IMAGINET An Imagine Transparency port. This port type is only available in Model 204 Version 8.0 and later. There can only be one started IMAGINET port in an Online. OAS Synonym for type SDS. OMNI Synonym for type SDS. OPENSERV Janus Open Server applications; Janus Open Client connections are outward-bound connections on an OPENSERV port. SRVSOCK A Janus Sockets server socket port. SRVSOCKU A Janus Sockets UDP server port. Only available in Sirius Mods Version 8.0 and later. SDS A Janus Specialty Data Store port. TNSERV A Janus Telnet Server port. WEBSERV A World Wide Web Server port. For Janus Open Client usage, you must define one or more ports of type SDS or OPENSERV, and you may need to use the MASTER parameter on a port definition. For JANUS server ports, specify SRVSOCK; for JANUS client ports, specify CLSOCK; for JANUS FTP server ports, specify FTPSERVER; for JANUS telnet server ports, specify TNSERV. TNSERV ports require that the system TNDEV parameter be set to indicate the IODEV that daemon threads switch to while in full-screen mode for a telnet connection.
maxcon	Maximum number of simultaneous active connections to be allowed on the port. This number must be less than or equal to the number of TCP/IP connections for which the site is licensed. If you are defining multiple ports for your site, however, the sum of the maxcon connections you define is allowed to be greater than the number for which the site is licensed. Janus Web Server will automatically prevent any connection that would exceed the site license limit. For Janus Open Client, note that a server-to-server connection requires an extra connection for the site handler. Thus, a single connection to a remote server would use two connections, while 10 connections to a remote server would use 11. You can use the JANUS TSTATUS command to view the thread usage and connection limits for your port, and you can use the JANUS LIMITS command to view similar information for your Online.
other_parms	A set of blank-delimited parameters that describe the characteristics of and processing to be performed on the port. These parameters are keywords, sometimes followed by values, and they are described individually in the subsections that follow. They are all optional, except: For OPENSERV ports, CMD is required. For CLSOCK or DEBUGGERCLIENT ports, REMOTE is required. For SRVSOCK or SRVSOCKU ports, CMD is required. For FTPSERVER ports, OPEN, CMD, NEWSESOPEN, and NEWSESCMD are not allowed.

Examples

The parameters you might use on a port definition vary by port type (that is, communication protocol), the security requirements of your shop and application, performance considerations and the applications that will run inside the Model 204 Online as a client or a service on this port.

There is no such thing as a "typical" port — each one is customized to the service or services running over the port.

JANUS DEFINE JANWEB 80 WEBSERV 50 WEBUSER WEBUSER TRACE 0 UPCASE - OBSIZE 10240 IBSIZE 10240 RBSIZE 10240 TIMEOUT 600 - OPEN FILE JANWEB MAXTEMP 14000 BINDADDR 198.242.244.47 - LOG REQ WEBLOGJW LOGCLOSET 57 NOAUDTERM COMPRESS 2 KEEPALIVE 30

In the above example, a Janus Web Server port is defined, named JANWEB. It runs at port 80 (the default web port) and allows 50 simultaneous connections. Buffer sizes are increases over the default settings and a variety of logging, compressions and other settings are specified.

JANUS DEFINE SOAP * CLSOCK 5 TIMEOUT 240 REMOTE * * MASTER

In the above example, a client socket "master" port called SOAP is defined, permitting 5 simultaneous outgoing connections to any remote hosts.

JANUS DEFINE parameters

ALLOCC	Indicates that input, output and request buffers are to be allocated when a connection is established and are to be freed when the connection is closed.
ANONYMOUS	Indicates that anonymous access is permitted to the FTP server being defined.
ANONUSER	Lets you change the name of the anonymous user, ANONUSER may be specified only if ANONYMOUS is also specified.
AUDTERM	Controls whether the server thread sends "non-compiler terminal output" to the audit trail.
AUTODONE	Requests Janus Web Server to treat a return to command mode after all port and ON rules CMDs have been processed as an implicit $Web_Done.
AUTOLOAD	Indicates that the incore copy of Janus tables are to be reloaded at the first request subsequent to a table redefinition.
AUTOON	Requests Janus Web Server to issue an implicit $Web_On before executing the commands specified in a JANUS WEB ON rule.
AUTOSYS	Sets the Model 204 AUTOSYS parameter to the indicated (subsys) value when a connection is received on a TNSERV port.
BINARY	Requests Janus Sockets to send and receive strings with $Sock_xxx functions or Socket methods using no translation.
BINDADDR	Specifies the IP address to which the port will be bound, if the host (machine) on which Model 204 is running supports multiple IP addresses.
BSIZE	Specifies the size of the TCP/IP input and output buffers.
CHAR	Requests Janus Sockets to translate strings (sent and received with Janus Sockets functions or methods) between the internal representation within Model 204 (EBCDIC) and the character representation used by the remote end of the connection.
CHARSET	Indicates, to the remote host, the character set being used by Janus.
CLIENTSOCKET	Names the client socket port to use to open connections back to the FTP client, if the client requests active file transfers.
CLOSEIMMED	Indicates that if a lost connection is noticed by the Janus PST, the PST should BUMP the Model 204 thread associated with the connection immediately.
CLOSEREAD	Indicates that web threads should "put up" a TCP/IP read after receiving the entire request but before processing it.
CMD	Specifies the Model 204 commands to be executed after the files and groups specified in the OPEN parameter are opened.
COMPRESS	Indicates the type of compression to be performed on outgoing Janus Web Server data.
CR	Indicates that lines of text data sent to a browser should be separated by the ASCII carriage return character (X'0D').
CRLF	Indicates that lines of text data sent to a browser should be separated by the ASCII carriage return and line feed characters (X'0D0A').
CSSINSP	Indicates whether or not Janus Web Legacy Support is to insert a space to represent the attribute byte on a 3270 screen.
CSSTITLEDIV and CSSTITLESPAN	Indicates whether Janus Web Legacy support is to use a <div> (CSSTITLEDIV) or <span> (CSSTITLESPAN) tag for the title line of a screen.
DBCS and NODBCS	Indicates whether or not the Model 204 DBCS parameter is to be automatically set to 1 on requests to a WEBSERV port.
DEBPORTCMD and NODEBPORTCMD	Indicates whether the commands specified in the CMD clause of the JANUS DEFINE command are to be run on threads debugging requests to the port with the JANUSDEBUG command.
DEBPORTOPEN and NODEBPORTOPEN	Indicates whether the files and groups specified in the OPEN clause of the JANUS DEFINE command are to be opened on threads debugging requests.
EXEC2RPC	Indicates that language requests should be converted to RPCs.
FINCLOSE and NOFINCLOSE	Affect how Janus Sockets applications respond to a closed connection.
FDWOL	Specifies that all FINDs done by Janus Specialty Data Store are to be done as Find Without Locks.
FORMPOSTWAIT	The default number of seconds to wait for the POST'ing of a form while using $Web_Form_Done.
FORMREDIRWAIT	The default number of seconds to wait for the client on a WEBSERV port (presumably a browser) to do the GET associated with a redirect generated by a $Web_Form_Done call.
HIGHPRIORITY	Adjusts the Model 204 scheduling priority of Janus Web Server threads by starting them at the upper end of their priority range rather than at their default priority.
HTTPVERSION	Sets the HTTP version returned to the browser by Janus Web Server.
IBSIZE	Specifies the size of the TCP/IP input buffer.
INPUTTIMEOUT	Tells Janus Web Server to use a different timeout value for input (receiving the web request) than for output.
JANCAT	Specifies the name of the file that contains the Model 204 to SQL mappings.
KEEPALIVE	Indicates the number of seconds a TCP/IP connection is to be held open after an HTTP request on that connection.
LANGUAGE	Indicates, to the remote host, the language being used by Janus.
LEGBL, LEGREV, LEGUS, NOLEGBL, NOLEGREV, and NOLEGUS	Sets blink, underscore and reverse characteristics for Janus Web Legacy Support screens.
LEGCSS and NOLEGCSS	Indicates whether or not Janus Web Legacy Support is to use Cascading Style Sheets.
LEGJS and NOLEGJS	Indicates whether or not Janus Web Legacy Support is to use JavaScript.
LF	Indicates that lines of text data sent to a browser should be separated by the ASCII line feed character (X'0A').
LINEND	Specifies the hex value of a string to be sent by Janus Sockets at the end of each "line;" that is, appended to the string sent by the $Sock_SendLn function or Socket SendWithLineEnd function or after each output line captured on the socket.
LOG	Specifies that all Janus Web Server requests for the port are to be logged to a sequential data set whose DDNAME is specified (as indicated in this parameter's syntax). The LOG data set records conform to the industry standard for web logging.
LOGAPPEND	Indicates that the Janus Web Server log data set for the port is to be opened in APPEND mode.
LOGCLOSET	Indicates how often the Janus Web Server log data set is to be "closed", that is how often the DSCB is to be updated for the log dataset.
LOGGMT	Indicates that the time stamps in the Janus Web Server log data set for the port are to be represented as GMT instead of local time.
LOGMSGI	Prevents Janus Web Server from saving Model 204 messages issued during logon for a web user.
MASTER	Specifies that this is the default port for outgoing client communication.
MAXCURS	Specifies the maximum number of cursors that can be opened for a single Janus Specialty Data Store connection.
MAXIPSES	Specifies the maximum number of Janus Web Legacy Support sessions maintained per IP address.
MAXREC	Specifies the maximum record length for input records on a Janus IFDIAL port.
MAXSAVE	Specifies the maximum number of compiled SQL requests to save in CCATEMP.
MAXTEMP	Specifies the maximum number of CCATEMP pages allowed to be used by a web request for holding input (file upload) and output (dynamically generated HTML) data.
MSGOPT	Specifies what types of information to report in MSIR. messages regarding Janus Web (only) requests.
MSGSEND and NOMSGSEND	Indicates whether or not Model 204 messages (as opposed to the output from PRINT or HTML statements) are to be sent to the browser.
MSG204	Specifies the Sybase message number to be used to return terminal output to the client.
MSG204L	Specifies the Sybase message number to be used to return terminal output to the client.
NEWPASSWORDC	This parameter prevents Janus Web Server from immediately sending an "Unauthorized" response to a browser after a password change.
NEWSESCMD	Specifies the Model 204 commands to be executed when a new login session is initiated.
NEWSESGUESTOK	Indicates that "guest" logins are to be allowed for $Sir_Login calls in programs run as part of NEWSESCMD processing.
NEWSESNOCLEARG	Indicates that GTBL is not to be cleared at the end of NEWSESCMD command processing.
NEWSESOPEN	Specifies the names of one or more Model 204 files or groups to be opened before any NEWSESCMD commands are executed.
NOAUDTERM	This parameter is used to control whether the server thread sends "non-compiler terminal output" to the audit trail.
NOAUTODONE	Prevents Janus Web Server from treating a return to command mode after all port and ON rules CMDs have been processed as an implicit $Web_Done.
NOAUTOON	Prevents Janus Web Server from preceding the execution of the command specified in a JANUS WEB ON rule with an implicit $Web_On.
NOSCREENREDIR	Indicates that Janus Web Server legacy support (automatic mapping of 3270 applications to HTML) is not to use the redirect's to map all screens for a legacy session to the same URL.
NOTRACEFIELD	Indicates the form field or fields whose values are not to be traced when the X'04' bit (causes tracing of form field values for web requests) of JANUS TRACE is in effect.
NOUPCASE	Indicates that no client data is to be converted to uppercase.
OBSIZE	Specifies the size of the TCP/IP output buffer.
OMNIACCT	Specifies the Model 204 ACCOUNT for the Janus Specialty Data Store catalog sdaemon for the port.
OMNIUSER	Specifies the Model 204 user ID for the Janus Specialty Data Store catalog sdaemon for the port.
OPEN	Specifies the name of one or more Model 204 files or groups to be opened when a server session is initiated.
PASVPORT	Identifies the first FTP server port number to use for "passive" file transfers.
PRELOGINUSER	Indicates the userid under which pre-login processing runs.
PRSTOK	Specifies the hex values of strings that are used to separate input strings using the $Sock_RecvPrs function or Socket ReceiveAndParse function.
PUBLOG	Indicates that a "real" login should be done for the SOCKUSER userid for SRVSOCK logons.
RAWHEADER	Tells Janus Web Server to save the raw web request header stream.
RAWINPUT	Tells Janus Web Server to save the raw input stream for an HTTP POST, regardless of the mime type set by the client in the content-type header.
RAWINPUTONLY	indicates that, regardless of the POST data content-type set by the client, Janus Web Server should: 1) Save the raw input stream of an HTTP POST and 2) Refrain from parsing the input content into form fields.
RBSIZE	Specifies the Janus RPC or Request buffer size.
REMOTE	Identifies the remote server and the remote port number to be used with a set of Janus Sockets CLSOCK connections.
RPCONLY	Indicates that only RPC requests are allowed on the port.
SCREEN and NOSCREEN	Indicates whether or not Janus Web Legacy screens will be allowed to appear on requests to the port.
SCREENTHROW and NOSCREENTHROW	Indicates whether or not Janus Web Legacy client errors will cause an exception to be thrown.
SCREENURL	Indicates that Janus Web Server legacy support (automatic mapping of 3270 applications to HTML) is to switch web applications that present a 3270 screen to a special internally generated URL.
SDSACCT	Specifies the Model 204 ACCOUNT for the Janus Specialty Data Store catalog sdaemon for the port.
SDSUSER	specifies the Model 204 USER for the Janus Specialty Data Store catalog sdaemon for the port.
SESCOOKIE	Indicates the name of a cookie that will be used to maintain logical sessions that will be used to perform trusted logins.
SESCOOKIENOSEC	Indicates that the cookie specified by SESCOOKIE will not be sent to the browser as a "secure" cookie.
SESFASTLOGIN	Reduces the login security overhead for Janus Web Server threads by causing a login performed for a continued session to be a "fast" login.
SESTIMEOUT	Indicates the number of minutes of inactivity that will cause a logical login session being held either via SESCOOKIE or SSLSES to be terminated.
SLOWCLOSE	Specifies a bitmask that indicates the conditions under which Janus Web Server is to perform a "slow" close of a connection with a browser.
SOCKACCT	Specifies the default Model 204 account ID used for SRVSOCK logons.
SOCKPMAX	Specifies the maximum number of sockets a user may have connected at any time using the particular Janus Sockets client port.
SOCKUSER	Specifies the default Model 204 user ID used for SRVSOCK logons.
SQUAREB	Overrides the default EBCDIC characters for square brackets in the Janus Web Server log file.
SSL	Indicates that communications on this port should be encrypted using SSL (Secure Sockets Layer) or TLS (Transport Layer Security) support.
SSLBSIZE	Specifies the size of the input and output buffers used for reading encrypted data for an SSL port.
SSLCACHE	Specifies the number of entries in virtual storage to be allocated for caching information related to this port's SSL sessions.
SSLCIPH	Limit the stream ciphers (encryption algorithms) that this port offers for SSL connections.
SSLCLCERT and SSLCLCERTR	Specify that an SSL server port will request an SSL certificate from the client.
SSLIBSIZE	Specifies the size of the SSL input buffer to be used on SSL ports.
SSLMAXAGE	Specifies the maximum number of minutes that an SSL session is to be maintained.
SSLMAXCERTL	Indicates the number of bytes of virtual storage to be allocated to hold incoming certificates presented for authentication.
SSLOBSIZE	Specifies the size of the SSL output buffer to be used on SSL ports.
SSLOPT	Specifies that the use of SSL-like encryption is optional for applications using the port.
SSLPROT	Specify the degree of SSL-like encryption available at this port.
SSLSES	Reduces the overhead of NEWSESCMD processing by limiting it to logical session establishment time.
SSLTRUST	Indicates that the certificate presented by the other side of a TLS/SSL connection is to be trusted, even if it is not signed by a known certifying authority. This parameter is only available in Model 204 7.7 and later.
SSLUNENC	Indicates that an unencrypted private key is being used in the certificate specified by the SSL parameter on this Janus server port definition.
STIMEOUT	Sets the number of seconds of inactivity after which a Janus Web Legacy session is terminated.
TCPLOG	Tells Janus Web Server to log in a sequential dataset all inbound and outbound TCP data transmitted for this port.
TCPKEEPALIVE	Specifies that connections on the port should use TCP keepalives.
TIMEOUT	Specifies the number of seconds of inactivity after which clients connected to this port will be disconnected.
TIMEZONE	A string indicating the IANA time zone under which the Online is running. This parameter is only valid for IMAGINET ports.
TRACE	Specifies the initial TRACE setting for the port.
UPCASE	Indicates that all client "names" are to be converted to uppercase.
VARIPADDR	Indicates that a single browser might access Janus Web Server using different IP addresses.
WEBACCT	Specifies the default Model 204 account ID used for web logons for URLs where no userid is required.
WEBCOOKID	Indicates that an identifying "cookie" should be sent to a browser to distinguish multiple browsers coming through the same proxy server or running on the same machine.
WEBLH	Synonym for WEBLOGHOLD.
WEBLM	Synonym for WEBLOGMAX.
WEBLOGCOOKIE	Indicates that, for public URLs, Janus Web Server should log the user in with the userid specified by cookie-name. Normally, all public URL logins use the default public userid (usually WEBUSER).
WEBLOGHOLD	Indicates the number of seconds that a "real" login should be saved for re-use on a web connection.
WEBLOGMAX	Indicates the maximum number of cached login sessions to be held for a single user.
WEBPL	Synonym for WEBPUBLOG.
WEBPUBLOG	Indicates that a "real" login should be done for the WEBUSER userid for public URLs.
WEBREALM	Indicates the security "realm" of userids and passwords.
WEBSDMAX	Indicates the maximum number of sdaemons to be used for cached web logins.
WEBSM	Synonym for WEBSDMAX.
WEBSOCKET and NOWEBSOCKET	Indicates whether or not the port will negotiate with a client to upgrade to the Web Socket protocol.
WEBUSER	Specifies the default Model 204 user ID used for web logons for URLs where no userid is required.
WSFQUERY	Indicates that Janus is to issue a "Write Structured Field Query" request to any Telnet client that connects to it.
XMLSCREEN and NOXMLSCREEN	Sets XML screen mode (Janus Web Legacy XML Support) characteristics for Janus Web Legacy Support screens.
XMLSCREENFIELD and NOXMLSCREENFIELD	Indicates whether or not a screenField attribute is to be added to Janus Web Legacy Support pages.
XMLSCREENREPUC	Specifies a Unicode character with which to replace an XMLSCREEN input character that cannot be translated to EBCDIC.
XMLNULLSCANCEL and XMLNULLSSEND	Sets XML screen mode (Janus Web Legacy XML Support) response to nulls for Janus Web Legacy Support screens.
XMLNULLSSTRIP and XMLNULLSBLANK	Sets an XML screen mode (Janus Web Legacy XML Support) null-replacement option for Janus Web Legacy Support screens.
XTAB	Specifies a translation table that has not yet been loaded with the JANUS LOADXT command, but the table must be loaded before the port can be started.

See also

• List of Janus commands
• List of JANUS DEFINE parameters
• Janus port processing and examples