Filters can be set for spots, announcements and WWV. You will find the directories for these under /spider/filter. You will -find some examples in the directories with the suffix .issue. There are two types of filter, one for incoming -information and one for outgoing information. Outgoing filters are in the form CALLSIGN.pl and incoming filters -are in the form in_CALLSIGN.pl. Filters can be set for both nodes and users. -
-
All filters work in basically the same way. There are several elements delimited by commas. -There can be many lines in the filter and they are read from the top by the program. -When writing a filter you need to think carefully about just what you want to achieve. You -are either going to write a filter to accept or to reject. -Think of a filter as having 2 main elements. For a reject filter, you would have a line -or multiple lines rejecting the things you do not wish to receive and then a default -line accepting everything else that is not included in the filter. Likewise, for an -accept filter, you would have a line or multiple lines accepting the things you wish -to receive and a default line rejecting everthing else. -
-
In the example below, a user requires a filter that would only return SSB spots -posted in Europe on the HF bands. This is achieved by first rejecting the CW section -of each HF band and rejecting all of VHF, UHF etc based on frequency. -Secondly, a filter rule is set based on CQ zones to only accept spots posted in -Europe. Lastly, a default filter rule is set to reject anything outside the filter. -
-
-
-$in = [
- [ 0, 0, 'r', # reject all CW spots
- [
- 1800.0, 1850.0,
- 3500.0, 3600.0,
- 7000.0, 7040.0,
- 14000.0, 14100.0,
- 18068.0, 18110.0,
- 21000.0, 21150.0,
- 24890.0, 24930.0,
- 28000.0, 28180.0,
- 30000.0, 49000000000.0,
- ] ,1 ],
- [ 1, 11, 'n', [ 14, 15, 16, 20, 33, ], 15 ], #accept EU
- [ 0, 0, 'd', 0, 1 ], # 1 = want, 'd' = everything else
-];
-
--
The actual elements of each filter are described more fully in the following sections. -
-
DXSpider deals seamlessly with standard AK1A type mail. It supports both +personal and bulletin mail and the sysop has additional commands to ensure +that mail gets to where it is meant. DXSpider will send mail almost +immediately, assuming that the target is on line. However, only one +mail message is dealt with at any one time. If a mail message is already +being sent or recieved, then the new message will be queued until it has +finished. +
The cluster mail is automatically deleted after 30 days unless the sysop +sets the "keep" flag using the msg command. +
+
The elements of the Spot filter are .... -
-
-
-[action, field_no, sort, possible_values, hops]
-
--
There are 3 elements here to look at. Firstly, the action element. This is very simple and only 2 possible states exist, -accept (1) or drop (0). +
Personal mail is sent using the sp command. This is actually the +default method of sending mail and so a simple s for send will do. +A full list of the send commands and options is in the command set +section, so I will not duplicate them here.
-
The second element is the field_no. There are 13 possiblities to choose from here .... -
-
-
- 0 = frequency
- 1 = call
- 2 = date in unix format
- 3 = comment
- 4 = spotter
- 5 = spotted dxcc country
- 6 = spotter's dxcc country
- 7 = origin
- 8 = spotted itu
- 9 = spotted cq
- 10 = spotter's itu
- 11 = spotter's cq
- 12 = callsign of the channel on which the spot has appeared
-
--
The third element tells us what to expect in the fourth element. There are 4 possibilities .... -
-
-
- n - numeric list of numbers e.g. [ 1,2,3 ]
- r - ranges of pairs of numbers e.g. between 2 and 4 or 10 to 17 - [ 2,4, 10,17 ]
- a - an alphanumeric regex
- d - the default rule
-
-Bulletin mail is sent by using the sb command. This is one of the +most common mistakes users make when sending mail. They send a bulletin +mail with s or sp instead of sb and of course +the message never leaves the cluster. This can be rectified by the sysop +by using the msg command.
-
The fifth element is simply the hops to set in this filter. This would only be used if the filter was for a node of -course and overrides the hop count in hop_table.pl. +
Bulletin addresses can be set using the Forward.pl file.
-
So, let's look at an example spot filter. It does not matter in the example who the filter is to be used for. -So, what do we need in the filter? We need to filter the spots the user/node requires and also set a default rule for -anything else outside the filter. Below is a simple filter that stops spots arriving from outside Europe. +
DXSpider receives all and any mail sent to it without any alterations needed +in files. Because personal and bulletin mail are treated differently, there +is no need for a list of accepted bulletin addresses. It is necessary, however, +to tell the program which links accept which bulletins. For example, it is +pointless sending bulletins addresses to "UK" to any links other than UK +ones. The file that does this is called forward.pl and lives in /spider/msg. +At default, like other spider files it is named forward.pl.issue. Rename it +to forward.pl and edit the file to match your requirements. +The format is below ...
-$in = [
- [ 0, 4, 'a', '^(K|N|A|W|VE|VA|J)'], # 0 = drop, 'a' = alphanumeric
- [ 1, 0, 'd', 0, 1 ], # 1 = want, 'd' = everything else
- ];
+#
+# this is an example message forwarding file for the system
+#
+# The format of each line is as follows
+#
+# type to/from/at pattern action destinations
+# P/B/F T/F/A regex I/F [ call [, call ...] ]
+#
+# type: P - private, B - bulletin (msg), F - file (ak1a bull)
+# to/from/at: T - to field, F - from field, A - home bbs, O - origin
+# pattern: a perl regex on the field requested
+# action: I - ignore, F - forward
+# destinations: a reference to an array containing node callsigns
+#
+# if it is non-private and isn't in here then it won't get forwarded
+#
+# Currently only type B msgs are affected by this code.
+#
+# The list is read from the top down, the first pattern that matches
+# causes the action to be taken.
+#
+# The pattern can be undef or 0 in which case it will always be selected
+# for the action specified
+#
+# If the BBS list is undef or 0 and the action is 'F' (and it matches the
+# pattern) then it will always be forwarded to every node that doesn't have
+# it (I strongly recommend you don't use this unless you REALLY mean it, if
+# you allow a new link with this on EVERY bull will be forwarded immediately
+# on first connection)
+#
+
+package DXMsg;
+
+@forward = (
+'B', 'T', 'LOCAL', 'F', [ qw(GB7MBC) ],
+'B', 'T', 'ALL', 'F', [ qw(GB7BAA GB7ADX PA4AB-14) ],
+'B', 'T', 'UK', 'F', [ qw(GB7BAA GB7ADX) ],
+'B', 'T', 'QSL', 'F', [ qw(GB7BAA GB7ADX PA4AB-14) ],
+'B', 'T', 'QSLINF', 'F', [ qw(GB7BAA GB7ADX PA4AB-14) ],
+'B', 'T', 'DX', 'F', [ qw(GB7BAA GB7ADX PA4AB-14) ],
+'B', 'T', 'DXINFO', 'F', [ qw(GB7BAA GB7ADX PA4AB-14) ],
+'B', 'T', 'DXNEWS', 'F', [ qw(GB7BAA GB7ADX PA4AB-14) ],
+'B', 'T', 'DXQSL', 'F', [ qw(GB7BAA GB7ADX PA4AB-14) ],
+'B', 'T', 'SYSOP', 'F', [ qw(GB7BAA GB7ADX) ],
+'B', 'T', '50MHZ', 'F', [ qw(GB7BAA GB7ADX PA4AB-14) ],
+);
Simply insert a bulletin address and state in the brackets where you wish +that mail to go. For example, you can see here that mail sent to "UK" will +only be sent to the UK links and not to PA4AB-14.
-
So the filter is wrapped in between a pair of square brackets. This tells Spider to look in between these limits. -Then each line is contained within its own square brackets and ends with a comma. Lets look carefully at the first line. -The first element is 0 (drop). Therefore anything we put on this line will not be accepted. The next element is 4. -This means we are filtering by the spotter. The third element is the letter "a" which tells the program to expect an -alphanumeric expression in the fourth element. The fourth element is a list of letters separated by the pipe symbol. -
-
What this line does is tell the program to drop any spots posted by anyone in the USA, Canada or Japan. +
To force the cluster to reread the file use load/forward
-
The second line is the default rule for anything else. The "d" tells us this and the line simply reads... accept anything else.
-
You can add as many lines as you need to complete the filter but if there are several lines of the same type it is neater -to enclose them all as one line. An example of this is where specific bands are set. We could write this like this .... +
The msg command is a very powerful and flexible tool for the +sysop. It allows the sysop to alter to and from fields and make other +changes to manage the cluster mail. +
Here is a full list of the various options ...
-[ 0,0,'r',[1800.0, 2000.0], 1],
-[ 0,0,'r',[10100.0, 10150.0], 1],
-[ 0,0,'r',[14000.0, 14350.0], 1],
-[ 0,0,'r',[18000.0, 18200.0], 1],
+ MSG TO <msgno> <call> - change TO callsign to <call>
+ MSG FRom <msgno> <call> - change FROM callsign to <call>
+ MSG PRrivate <msgno> - set private flag
+ MSG NOPRrivate <msgno> - unset private flag
+ MSG RR <msgno> - set RR flag
+ MSG NORR <msgno> - unset RR flag
+ MSG KEep <msgno> - set the keep flag (message won't be deleted ever)
+ MSG NOKEep <msgno> - unset the keep flag
+ MSG SUbject <msgno> <new> - change the subject to <new>
+ MSG WAittime <msgno> - remove any waiting time for this message
+ MSG NOREad <msgno> - mark message as unread
+ MSG REad <msgno> - mark message as read
+ MSG QUeue - queue any outstanding bulletins
+ MSG QUeue 1 - queue any outstanding private messages
These commands are simply typed from within the cluster as the sysop user.
-
But the line below achieves the same thing and is more efficient .... +
You can check on a message from within the cluster by using the command +stat/msg. This will give you additional information on the +message number including which nodes have received it, which node it +was received from and when etc. Here is an example of the output of +the command ...
- [ 0, 0, 'r',
- [
- 1800.0, 2000.0, # top band
- 10100.0, 10150.0, # WARC
- 14000.0, 14350.0, # 20m
- 18000.0, 18200.0, # WARC
- [ ,1 ],
+G0VGS de GB7MBC 28-Jan-2001 1308Z >
+stat/msg 6869
+ From: GB7DJK
+ Msg Time: 26-Jan-2001 1302Z
+ Msgno: 6869
+ Origin: GB7DJK
+ Size: 8012
+ Subject: AMSAT 2line KEPS 01025.AMSAT
+ To: UK
+Got it Nodes: GB7BAA, GB7ADX
+ Private: 0
+Read Confirm: 0
+ Times read: 0
+G0VGS de GB7MBC 28-Jan-2001 1308Z >
-
-
This is described in the section on Other filters so I will not +duplicate it here.
-
-
-
-# This is an example announce or filter allowing only West EU announces
-#
-# The element list is:-
-# 0 - callsign of announcer
-# 1 - destination * = all, <callsign> = routed to the node
-# 2 - text
-# 3 - * - sysop, <some text> - special list eg 6MUK, ' ', normal announce
-# 4 - origin
-# 5 - 0 - announce, 1 - wx
-# 6 - channel callsign (the interface from which this spot came)
-
-$in = [
- [ 1, 0, 'a', '^(P[ABCDE]|DK0WCY|G|M|2|EI|F|ON)' ],
- [ 0, 0, 'd', 0 ]
-];
-
-In this example, only the prefixes listed will be allowed. It is possible to be quite specific. The Dutch prefix "P" is -followed by several secondary identifiers which are allowed. So, in the example, "PA" or "PE" would be ok but not "PG". It -is even possible to allow information from a single callsign. In the example this is DK0WCY, to allow the posting of his -Aurora Beacon. -
-
Distribution lists are simply a list of users to send certain types of +mail to. An example of this is mail you only wish to send to other +sysops. In /spider/msg there is a directory called distro. You +put any distibution lists in here. For example, here is a file called +SYSOP.pl that caters for the UK sysops.
-
-# This is an example WWV filter
-#
-# The element list is:-
-# 0 - nominal unix date of spot (ie the day + hour:13)
-# 1 - the hour
-# 2 - SFI
-# 3 - K
-# 4 - I
-# 5 - text
-# 6 - spotter
-# 7 - origin
-# 8 - incoming interface callsign
-
-# this one doesn't filter, it just sets the hop count to 6 and is
-# used mainly just to override any isolation from WWV coming from
-# the internet.
-
-$in = [
- [ 1, 0, 'd', 0, 6 ]
-];
+qw(GB7TLH GB7DJK GB7DXM GB7CDX GB7BPQ GB7DXN GB7MBC GB7MBC-6 GB7MDX
+ GB7NDX GB7SDX GB7TDX GB7UDX GB7YDX GB7ADX GB7BAA GB7DXA GB7DXH
+ GB7DXK GB7DXI GB7DXS)
Any mail sent to "sysop" would only be sent to the callsigns in this list.
-
It should be noted that the filter will start to be used only once a user/node has logged out and back in again. -
I am not going to spend any more time on these filters now as they will become more "comprehensive" in the near future. +
Spider provides a simple BBS interface. No input is required from the sysop +of the cluster at all. The BBS simply sets the cluster as a BBS and pushes +any required mail to the cluster. No mail can flow from Spider to the BBS, +the interface is one-way. +
+
Please be careful not to flood the cluster network with unnecessary mail. +Make sure you only send mail to the clusters that want it by using the +Forward.pl file very carefully.