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- Cornell Reflector Version 3.00B3
-
- This is a BETA version of the newest release of the CU-SeeMe
- reflector program, version 3.00B3.
-
- Changes between 3.00B2 and 3.00B3
-
- 1) Added default reflector messages for max-lurkers and
- max-senders.
-
- 2) fixed several bugs having to do with supporting VAT
- clients.
-
- -----------
-
- Changes between 3.00B1 and 3.00B2
-
- All of the changes between versions B1 and B2 have been
- bug fixes - no new features have been added. There are
- still some outstanding bugs that haven't been corrected in
- B2 and you should anticipate another bug fix version B3
- to be out in a week or two.
-
- 1) The conference id feature was basically broken
-
- 2) The MAX-SENDERS and MAX-LURKERS configuration
- features had some problems.
-
- 3) When using the Mbone tools vat and nv there
- was a problem if a client went from being
- a vat and nv client to just a vat client.
-
- 4) The correct version number was not always being
- set for nv clients, so sometimes when looking at
- the version information on the CUSM window, it
- would not say nv client.
-
-
-
- fix a bug in the conference id
-
- fix a couple of bugs with the max senders and max lurkers when the
- client made a transition without disconnecting
-
- fix a bug in the calculation of the client count
-
- fix a bug in that when a client is both nv and
- vat and the nv session disappears then the vat
- session keeps the guys window up on the CUSM
- screaan because the seq numing in the make OCP
- for vat clients routine was never being increamented.
-
- 1/6 set the right version # in the OCP for vat OCP's
-
- 1/6 fix a bug in the calculations of # of lurkers and
- # of senders
-
- If you are compiling this code on a machine without a
- multicast kernel, you will have to remove the -DMULTI
- definition from the makefile.
-
- If you are connecting reflectors together, make sure that all
- the reflectors are using the same version.
-
- Bug reports and or general comments can either be sent to the
- CU-SeeMe bug list at cu-seeme-bugs@cornell.edu, or directly
- to me, John Lynn, at John-A-Lynn@cornell.edu.
-
- Reflector Operation
-
- The reflector is started with a single optional parameter,
- the configuration file name. If no configuration file is
- specified, the reflector tries to open the default
- configuration file called reflect.conf. If that file is not
- found, then no configuration information is specified and the
- default values for all configuration parameters are used.
- The configuration file is an ASCII text file. Each line
- begins with a keyword which specifies the parameter
- configured. Some of the keywords are followed by arguments
- that specify the value(s) for that configuration parameter.
- Any line which begins with a semicolon (;) is a comment line
- and is ignored by the reflector.
-
- The following are the configuration keywords and their
- parameters if any exist.
-
- DEBUG
-
- Specifying DEBUG causes the reflector to print out a large
- amount of debugging information. This information is
- probably not particularly meaningful to anyone but the
- reflector programmer and will slow down the operation of the
- reflector, so DEBUG in general should not be added to the
- configuration.
-
-
- SELF-REFLECT
-
- SELF-REFLECT causes the reflector to send your own CU-SeeMe
- stream back to you. This also is a sort of debugging aid,
- allowing you to make sure your reflector is up and running.
-
-
- REFMON ip-addr
-
- REFMON is used to specify the IP address of the UNIX
- workstation that is allowed to access the reflector using the
- refmon application. If no REFMON is specified in the
- configuration, then a refmon application running on any
- workstation will be allowed access to your reflector. If the
- IP address is specified as 0.0.0.0, then no refmon anywhere
- will be granted access. The refmon application is documented
- later on As refmon can be used to kill the reflector, it's
- probably best to include this parameter in all configuration
- files.
-
-
- CONF-ID conference-id msg-string
- //
-
- Specifying CONF-ID allows you to have a measure of privacy on
- a public reflector. In any Mac version of CU-SeeMe above
- 0.70 or any PC version above 0.34, the application will allow
- the user to optionally specify a conference id when opening a
- connection. The default conference id is 0 which is also the
- reflector's default conference id. When the reflector is
- configured, defaulted, or set to zero all user conference
- ID's are accepted. If the reflector is configured with a
- conference ID other then 0, then any incoming CU-SeeMe
- conference id must match the conference id in the reflector.
- The conference ID is a 16 bit value (range from 0 to 65535).
- If the reflector's conference ID is less then 32768 (high bit
- not on) and the conference ids do not match, then that
- participant is not added to the conference. If the
- reflector's conference ID is between 32768 and 65535 (high
- bit on) and the conference ids do not match, then that
- participant is allowed to join the conference but is
- prohibited from sending either audio or video. To have a
- private conference, without uninvited participants, you would
- pick a random conference id in the appropriate range, add it
- to the configuration file, make this number known to all of
- your invited guests, and ask them to specify this conference
- id when connecting to the reflector. The msg string is an
- ascii string terminated by a carriage return followed by two
- back slashes. This is the string that will appear on a
- participant's screen if he tries to connect with the wrong
- conference ID. Maximum length of msg-string is 80 characters
- for this and all other msg-strings. Also see CONF-MGR below.
-
-
- CONF-MGR ip-address
-
- The CONF-MGR ip address, is the ip address of a participant
- that is permitted to set the conference id when he connects.
- This allows a designated participant to dynamically establish
- a restricted conference without having to manually
- reconfigure the reflector. When the conference manager
- connects to a reflector he can specify a non-zero conference
- ID number. All participants currently connected with this
- correct ID number will remain connected. All participants
- currently connected with the wrong conference ID or zero will
- be disconnected and the message string that was specified in
- the CONF-ID configuration parameter will appear on their
- screen (or they will have their sending halted, for ID >
- 32768). All future connection attempts will also have to
- contain the correct conference ID The conference ID remains
- in effect until the conference manager resets it to another
- number or perhaps 0 to make it an unrestricted conference.
-
-
- CAP cap hold-down-time msg-string
- //
-
- CAP is used to enforce transmission rate limits for those
- participants that connect to your reflector. If a
- participant sets his maximum transmission rate above the cap
- that you specified he will automatically be disconnected from
- the reflector and prohibited to reconnect for the specified
- hold-down-time. Cap is specified in kilo bits per second and
- hold-down time is specified in minutes. The default value
- for cap is 80 kilo bits per second and the default value for
- hold-down-time is 1 minute.
-
-
- ADMIT ip-address msg-string
- //
-
- ADMIT is another mechanism you can use to limit the
- participants in a conference. By adding an ADMIT IP address
- line for each invited participant, the reflector will
- restrict the conference to only those participants who have
- an IP address which matches one of the IP addresses specified
- by an ADMIT line. The msg string is an ascii string
- terminated by a carriage return followed by two back slashes.
- This is the string that will appear on a participant's screen
- if he tries to connect but he is not on the admit list.
- Currently, there must be a message string specified with each
- ADMIT in the configuration file, but only the message string
- associated with the last ADMIT in the configuration file will
- be used. For now, that means you should just enter in some
- dummy string for each ADMIT in the configuration file except
- the last one. In some future version of the reflector all
- the message strings will be optional so that this nuisance
- will go away.
-
-
- MAX-PARTICIPANTS maxallowed msg-string
- //
-
- MAX-PARTICIPANTS allows you to limit the load on your
- reflector to the specified number of participants. The
- maxallowed range is 0 to 40, with the default equal to 20.
- The msg string is an ascii string terminated by a carriage
- return followed by two back slashes. This is the string that
- will appear on a participant's screen if he tries to connect
- but the maximum number of allowed participants has been
- exceeded.
-
-
- MAX-SENDERS maxsendersallowed msg-string
- //
-
- MAX-SENDERS allows you to limit the number of video senders
- on your reflector to the specified number of participants.
- The maxsendersallowed range is 0 to 40, with the default
- equal to 20. The msg string is an ascii string terminated by
- a carriage return followed by two back slashes. This is the
- string that will appear on a participant's screen if he tries
- to connect as a sender but the maximum number of video
- sending participants has been exceeded.
-
-
- MAX-LURKERS maxlurkersallowed msg-string
- //
-
- MAX-LURKERS allows you to limit the number of receive only
- participants on your reflector to the specified number of
- participants. The maxlurkersallowed range is 0 to 40, with
- the default equal to 20. The msg string is an ascii string
- terminated by a carriage return followed by two back slashes.
- This is the string that will appear on a participant's screen
- if he tries to connect as a non video sender but the maximum
- number of lurkers has been exceeded.
-
-
- LOG filename
-
- The reflector logs a small amount of information such as each
- participants arrival and departure from the conference in a
- log file. The default name for this file is reflect.log. To
- change the name of this file specify the LOG parameter with a
- different file name.
-
-
- LOG-LIMIT log-file-line-limit
-
- If you have a busy reflector running for several days the log
- file can grow quite large. Use LOG-LIMIT to limit the number
- of lines in the log file. The default is 10,000 lines of log
- information. After the log file line limit is reached the
- reflector will erase the log file and start a new one with
- the same name. If you specify a log file line limit of 0, no
- log file will be created.
-
-
- MOTD motd-string
- //
-
- MOTD is used to specify the message of the day. In any Mac
- version of CU-SeeMe above 0.70, or an PC version above 0.34
- the application will display any motd messages when a user
- first connects to a reflector. The motd can be up to 800
- characters in length. The message of the day string is an
- ascii string terminated by a carriage return followed by two
- back slashes.
-
-
-
-
- ADMIT-BCC-CLIENT ip-address
-
- ADMIT-BCC-CLIENT is used to cause the reflector to send a
- blind carbon copy of all of the CU-SeeMe streams to another
- reflector. This is used if you are putting on an event where
- there are a small number of active participants and a large
- number of passive viewers. The primary conference is run off
- of the main reflector. This reflector is configured with one
- or more ADMIT-BCC-CLIENT lists causing it to send CU-SeeMe
- streams to other reflectors. The passive audience then
- connects to these other reflectors on the "reflector net" to
- watch the main event.
-
-
- ADMIT-GENERAL-BCC count id
-
- Often when setting up an event reflector you don't really
- care which reflectors are going to be configured to receive
- your feed in addition updating the configuration file becomes
- tedious as new reflector sites ask to connect. ADMIT-
- GENERAL-BCC allows you the freedom to specify how many feeds
- you are willing to send out without having to be concerned
- about the actuall ip addresses of the connecting reflectors.
- The id field is a 16 bit value which you can use to make sure
- that only those reflectors with the correct id will be
- allowed to connect to yours.
-
-
- OBTAIN-BCC ip-address
-
- OBTAIN-BCC is used to configure a reflector to receive a
- blind carbon copy feed from another reflector which has been
- configured with ADMIT-BCC, as explained above.
-
-
- OBTAIL-GENERAL-BCC ip-address id
-
- OBTAIN-GENERAL-BCC is used to configure a reflector to
- receive a blind carbon copy feed from another reflector which
- has been configured with ADMIT-GENERAL-BCC, as explained
- above.
-
-
- MC-OUT ttl multicast-addr
-
- MC-OUT and MC-IN (see below) are similar to ADMIT-BCC-CLIENT
- and OBTAIN-BCC client, but take advantage of IP Multicasting.
- To use any of the multicast capabilities of the reflector,
- you must first make sure that your reflector has been
- compiled with the -DMULT switch, this causes the multicast
- code to be compiled into the reflector. Second, the
- reflector host must support multicast. Consult with your
- local UNIX guru to find out if your system is multicast
- capable or not. MC_OUT will send all CU-SeeMe streams to the
- specified multicast address using the specified ttl (time to
- live).
-
-
- MC-IN multicast-addr
-
- MC-IN is used to configure a reflector to receive a multicast
- stream put out by another reflector, as explained above. MC-
- IN and MC-OUT should not be used together on the same
- reflector.
-
-
- UNICAST-REF ip-address
-
- UNICAST-REF is used to "tie together" two or more reflectors.
- This feature is useful if you are running a conference whose
- participants are spread out across the country. For example,
- if you have some folks on the east coast, another group in
- California, and perhaps a third group in the south, each
- group can connect to their local reflector and using UNICAST-
- REF you can connect all three reflectors together. This
- makes for a more efficient use of network bandwidth, rather
- than having everyone connect to a single reflector. Each
- reflector should have a UNICAST-REF for each other reflector.
-
-
- MC-GROUP ttl multicast-addr
-
- MC-GROUP is similar to UNICAST-REF, but takes advantage of IP
- Multicasting. Two or more reflectors can be "tied together"
- using IP multicast. Reflectors configured with MC-GROUP will
- send out all CU-SeeMe streams to the specified multicast
- address using the specified ttl, in addition they will accept
- incoming CU-SeeMe streams from that multicast address.
-
-
- NO-LOCAL-SENDERS
-
- NO-LOCAL-SENDERS is used in a configuration file that also
- contains either OBTAIN-BCC or MC-IN. NO-LOCAL-SENDERS sets
- up a reflector that is only used in viewing a conference
- taking place on a primary reflector. Since the purpose is to
- view the main event, you can disable local interaction among
- those who have connected to watch the main event. This will
- reduce the load on your secondary reflector.
-
-
- ADMIT-SENDER ip-address
-
- ADMIT-SENDER is used in conjunction with NO-LOCAL-SENDERS to
- allow the specified ip-address to send video, while
- restricting all other participants to receive only. You may
- have multiple ADMIT_SENDER entries in your configuration
- file.
-
-
- NV-UC-PORT port-number
-
- Specifies the UDP port number to use when communicating with
- nv via a unicast connection.
-
-
- NV-MC-PORT port-number
-
- Specifies the UDP port number to use when communicating with
- nv via a multicast connection.
-
-
- NV-MC-IN multicast-addr
-
- Specifies a multicast address for receiving CU-SeeMe encoded
- video from nv via the Mbone.
-
-
- NV-MC-OUT ttl multicast-addr
-
- Specifies a ttl and a multicast address for sending CU-SeeMe
- video to nv via the Mbone. If both NV-MC-IN and NV-MC-OUT
- are specified, then the multicast addresses must be
- identical.
-
-
- NV-STREAMS number-streams
-
- Specifies the maximum number of video streams to send to any
- nv unicast client. Since nv does not currently provide a
- mechanism for pruning unwanted video streams, it's important
- to limit the bandwidth sent to nv clients. The default
- number of streams sent is 4. Note that if more than the
- allowed number are available there is no control over which
- will be sent. The same set will be sent to all nv's which
- connect. This facility is workable for having a conference
- with a known set of nv and CU-SeeMe participants, or for
- testing with nv on a public reflector, but not for general nv
- participation in open reflector conferences. It is a
- temporary arrangement.
-
-
- VAT-UC-PORT vat-port
-
- Specifies the UDP port number to use when communicating with
- vat via a unicast connection.
-
-
- VAT-MC-PORT port
-
- Specifies the UDP port number to use when communicating with
- vat via a multicast connection.
-
-
- VAT-MC-IN multicast-addr
-
- Specifies a multicast address for receiving vat audio from
- the mbone.
-
-
- VAT-MC-OUT ttl multicast-addr
-
- Specifies a ttl and a multicast address for sending audio to
- vat via the Mbone. If both VAT-MC-IN and VAT-MC-OUT are
- specified, the the multicast addresses must be identical.
-
-
- VAT-CONF-ID id
-
- Specifies the conference id to use with vat.
-
- MIN-MAC-VERSION version-number msg-string
- //
-
- MIN-MAC-VERSION is used to ensure that all of the Mac clients
- connecting to your reflector are at least at some minimum
- version number. This is useful if you are running a
- conference and there is some feature in a later version of
- CU-SeeMe, like audio, that you want to use during the
- conference. By setting a minimum version number only those
- clients with a version of CU-SeeMe greater or equal to the
- one designated, will be allowed to connect to the reflector.
- The msg string is an ascii string terminated by a carriage
- return followed by two back slashes. This is the string that
- will appear on the user's screen if the version he using is
- less then the specified version-number. The version numbers
- for Mac based CU-SeeMe are as follows: 70b1 is 12, 70b12 is
- 18, 70b13 is 19, 70b14 is 22, 70b15 is 25.
-
- MIN-PC-VERSION version-number msg-string
- //
-
- MIN-PC-VERSION is used to ensure that all of the PC clients
- connecting to your reflector are at least at some minimum
- version number. This is useful if you are running a
- conference and there is some feature in a later version of
- CU-SeeMe, like audio, that you want to use during the
- conference. By setting a minimum version number only those
- clients with a version of CU-SeeMe greater or equal to the
- one designated, will be allowed to connect to the reflector.
- The msg string is an ascii string terminated by a carriage
- return followed by two back slashes. This is the string that
- will appear on the user's screen if the version he using is
- less then the specified version-number. The current version
- number for PC based CU-SeeMe0.34 is 2.
-
-
- DENY ip-address msg-string
- //
-
- Deny causes the reflector to deny access to the client at the
- specified IP address.
-
-
- REFMON Version 1.00
-
- Refmon stands for reflector monitor, it is a program that is
- used to monitor the state of your reflector. Currently
- refmon has one switch -s which is used to specify the host
- name or IP address of the machine running the reflector. For
- example
-
- refmon -s hellbat.cit.cornell.edu
-
- will start up a refmon to query the reflector running on
- hellbat.cit.cornell.edu. Once refmon is started up it
- accepts commands, the commands cause a query to be sent to
- the reflector and the reflector's response is printed out on
- the screen. The commands are the following:
-
- quit
- quits the refmon application.
-
-
- version
- shows the version number of the reflector.
-
-
- who
- shows a list of the participants currently connected to
- the reflector.
-
-
- maven
- shows a list of all maven clients currently connected to
- the reflector.
-
-
- uptime
- shows the time that the reflector was started.
-
-
- term
- kills the reflector application.
-
-
- param
- prints out the configuration file.
-
-
- help
- prints out this list of commands
-