net::ph(3)

NAME

Net::PH - CCSO Nameserver Client class

SYNOPSIS

use Net::PH;
$ph = Net::PH->new("some.host.name",
                   Port    => 105,
                   Timeout => 120,
                   Debug   => 0);
if($ph) {
    $q = $ph->query({ field1 => "value1" },
                    [qw(name address pobox)]);
    if($q) {
    }
}
# Alternative syntax
if($ph) {
    $q = $ph->query('field1=value1',
                    'name address pobox');
    if($q) {
    }
}

DESCRIPTION

"Net::PH" is a class implementing a simple Nameserver/PH
client in Perl as described in the CCSO Nameserver -Server-Client Protocol. Like other modules in the Net::
family the "Net::PH" object inherits methods from
"Net::Cmd".

CONSTRUCTOR

new ( [ HOST ] [, OPTIONS ]): $ph = Net::PH->new("some.host.name",
Port => 105,
Timeout => 120,
Debug => 0; );
This is the constructor for a new Net::PH object. "HOST" is the name of the remote host to which a PH connection is required.
If "HOST" is not given, then the "SNPP_Host" specified in "Net::Config" will be used.
"OPTIONS" is an optional list of named options which are passed in a hash like fashion, using key and value pairs. Possible options are:
Port - Port number to connect to on remote host.
Timeout - Maximum time, in seconds, to wait for a response from the Nameserver, a value of zero will
cause all IO operations to block. (default: 120)
Debug - Enable the printing of debugging information to STDERR

METHODS

Unless otherwise stated all methods return either a true
or false value, with true meaning that the operation was a success. When a method states that it returns a value,
failure will be returned as undef or an empty list.

query( SEARCH [, RETURN ] ): $q = $ph->query({ name => $myname },
[qw(name email schedule)]);
foreach $handle (@{$q}) {: foreach $field (keys %{$handle}) {
$c = ${$handle}{$field}->code;
$v = ${$handle}{$field}->value;
$f = ${$handle}{$field}->field;
$t = ${$handle}{$field}->text;
print "field:[$field] [$c][$v][$f][$t]0 ;; }
}
Search the database and return fields from all match ing entries.
The "SEARCH" argument is a reference to a HASH which contains field/value pairs which will be passed to the Nameserver as the search criteria.
"RETURN" is optional, but if given it should be a ref erence to a list which contains field names to be returned.
The alternative syntax is to pass strings instead of references, for example: $q = $ph->query('name=myname',
'name email schedule');
The "SEARCH" argument is a string that is passed to
the Nameserver as the search criteria. The strings
being passed should not contain any carriage returns, or else the query command might fail or return invalid
data.
"RETURN" is optional, but if given it should be a string which will contain field names to be returned.
Each match from the server will be returned as a HASH where the keys are the field names and the values are "Net::PH:Result" objects (code, value, field, text).
Returns a reference to an ARRAY which contains refer ences to HASHs, one per match from the server.
change( SEARCH , MAKE ): $r = $ph->change({ email => "*.domain.name" },
{ schedule => "busy");
Change field values for matching entries.
The "SEARCH" argument is a reference to a HASH which contains field/value pairs which will be passed to the Nameserver as the search criteria.
The "MAKE" argument is a reference to a HASH which contains field/value pairs which will be passed to the Nameserver that will set new values to designated fields.
The alternative syntax is to pass strings instead of references, for example: $r = $ph->change('email="*.domain.name"',
'schedule="busy"');
The "SEARCH" argument is a string to be passed to the
Nameserver as the search criteria. The strings being
passed should not contain any carriage returns, or else the query command might fail or return invalid
data.
The "MAKE" argument is a string to be passed to the Nameserver that will set new values to designated fields.
Upon success all entries that match the search crite ria will have the field values, given in the Make argument, changed.
login( USER, PASS [, ENCRYPT ]): $r = $ph->login('username','password',1);
Enter login mode using "USER" and "PASS". If "ENCRYPT" is given and is true then the password will be used to encrypt a challenge text string provided by the server, and the encrypted string will be sent back to the server. If "ENCRYPT" is not given, or false then the password will be sent in clear text (this is not recommended)
logout(): $r = $ph->logout();
Exit login mode and return to anonymous mode.
fields( [ FIELD_LIST ] ): $fields = $ph->fields();
foreach $field (keys %{$fields}) {
$c = ${$fields}{$field}->code;
$v = ${$fields}{$field}->value;
$f = ${$fields}{$field}->field;
$t = ${$fields}{$field}->text;
print "field:[$field] [$c][$v][$f][$t]0;; }
In a scalar context, returns a reference to a HASH. The keys of the HASH are the field names and the val ues are "Net::PH:Result" objects (code, value, field, text).
In an array context, returns a two element array. The first element is a reference to a HASH as above, the second element is a reference to an array which con tains the tag names in the order that they were returned from the server.
"FIELD_LIST" is a string that lists the fields for which info will be returned.
add( FIELD_VALUES ): $r = $ph->add( { name => $name, phone => $phone; });
This method is used to add new entries to the Name server database. You must successfully call the login manpage before this method can be used.
Note that this method adds new entries to the database. To modify an existing entry use the change
manpage.
"FIELD_VALUES" is a reference to a HASH which contains field/value pairs which will be passed to the Name server and will be used to initialize the new entry.
The alternative syntax is to pass a string instead of a reference, for example: $r = $ph->add('name=myname phone=myphone');
"FIELD_VALUES" is a string that consists of
field/value pairs which the new entry will contain.
The strings being passed should not contain any car riage returns, or else the query command might fail or
return invalid data.
delete( FIELD_VALUES ): $r = $ph->delete('name=myname phone=myphone');
This method is used to delete existing entries from the Nameserver database. You must successfully call the login manpage before this method can be used.
Note that this method deletes entries to the database. To modify an existing entry use the change manpage.
"FIELD_VALUES" is a string that serves as the search criteria for the records to be deleted. Any entry in the database which matches this search criteria will be deleted.
id( [ ID ] ): $r = $ph->id('709');
Sends "ID" to the Nameserver, which will enter this into its logs. If "ID" is not given then the UID of the user running the process will be sent.
status(): Returns the current status of the Nameserver.
siteinfo(): $siteinfo = $ph->siteinfo();
foreach $field (keys %{$siteinfo}) {
$c = ${$siteinfo}{$field}->code;
$v = ${$siteinfo}{$field}->value;
$f = ${$siteinfo}{$field}->field;
$t = ${$siteinfo}{$field}->text;
print "field:[$field] [$c][$v][$f][$t]0;; }
Returns a reference to a HASH containing information about the server's site. The keys of the HASH are the field names and values are "Net::PH:Result" objects (code, value, field, text).
quit(): $r = $ph->quit();
Quit the connection

Q&A

How do I get the values of a Net::PH::Result object?: foreach $handle (@{$q}) {
foreach $field (keys %{$handle}) {
$my_code = ${$q}{$field}->code;
$my_value = ${$q}{$field}->value;
$my_field = ${$q}{$field}->field;
$my_text = ${$q}{$field}->text;

}; }
How do I get a count of the returned matches to my query?: $my_count = scalar(@{$query_result});
How do I get the status code and message of the last "$ph" command?: $status_code = $ph->code;
$status_message = $ph->message;

AUTHORS

Graham Barr <gbarr@pobox.com> Alex Hristov <hris
tov@slb.com>

ACKNOWLEDGMENTS

Password encryption code ported to perl by Broc Seib
<bseib@purdue.edu>, Purdue University Computing Center.

Otis Gospodnetic <otisg@panther.middlebury.edu> suggested passing parameters as string constants. Some queries can not be executed when passing parameters as string refer ences.: Example: query first_name last_name email="*.do; main"

COPYRIGHT

The encryption code is based upon cryptit.c, Copyright (C)
1988 by Steven Dorner, and Paul Pomes, and the University
of Illinois Board of Trustees, and by CSNET.

All other code is Copyright (c) 1996-1997 Graham Barr
<gbarr@pobox.com> and Alex Hristov <hristov@slb.com>. All
rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as
Perl itself.

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