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=head1 NAME |
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Net::SNMP::XS - speed up Net::SNMP by decoding in XS, with limitations |
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=head1 SYNOPSIS |
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use Net::SNMP::XS; |
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# loading it is enough, there are no public symbols |
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=head1 DESCRIPTION |
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This module tries to speed up Net::SNMP response packet decoding. |
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It does this by overriding a few selected internal method by (almost) |
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equivalent XS methods. |
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This currently reduces decode time by a factor of ten for typical bulk |
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responses. |
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There are currently the following limitations when using this module: |
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|
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=over 4 |
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|
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=item overriding internal functions might cause the module to |
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malfunction with future versions of Net::SNMP |
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|
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=item only leading dots for oids are supported |
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=item error messages will be simpler/different |
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=item oid components are limited to unsigned 32 bit integers |
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=item translation will be ignored (all values will be delivered "raw") |
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=item a 64 bit perl is required |
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=item a moderately modern (>= C99) C compiler is required |
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=item only tested with 5.10 |
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=item duplicate OIDs are not supported |
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=item REPORT PDUs are not supported |
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=back |
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=cut |
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package Net::SNMP::XS; |
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use strict qw(vars subs); |
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no warnings; |
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use Guard; |
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use Net::SNMP::PDU (); |
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use Net::SNMP::Message (); |
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use Net::SNMP::MessageProcessing (); |
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our $VERSION; |
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our $old_prepare; |
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BEGIN { |
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$VERSION = '0.01'; |
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$old_prepare = \&Net::SNMP::MessageProcessing::prepare_data_elements; |
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# this overrides many methods inside |
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require XSLoader; |
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XSLoader::load Net::SNMP::XS, $VERSION; |
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} |
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sub Net::SNMP::MessageProcessing::prepare_data_elements { |
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my ($self, $msg) = @_; |
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set_msg $msg, $msg->{_buffer}; |
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scope_guard \&clr_msg; |
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&$old_prepare |
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} |
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{ |
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package Net::SNMP::Message; |
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Net::SNMP::XS::set_type INTEGER , \&_process_integer32; |
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Net::SNMP::XS::set_type OCTET_STRING , \&_process_octet_string; |
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Net::SNMP::XS::set_type NULL , \&_process_null; |
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Net::SNMP::XS::set_type OBJECT_IDENTIFIER, \&_process_object_identifier; |
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Net::SNMP::XS::set_type SEQUENCE , \&_process_sequence; |
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Net::SNMP::XS::set_type IPADDRESS , \&_process_ipaddress; |
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Net::SNMP::XS::set_type COUNTER , \&_process_counter; |
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Net::SNMP::XS::set_type GAUGE , \&_process_gauge; |
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Net::SNMP::XS::set_type TIMETICKS , \&_process_timeticks; |
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Net::SNMP::XS::set_type OPAQUE , \&_process_opaque; |
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Net::SNMP::XS::set_type COUNTER64 , \&_process_counter64; |
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Net::SNMP::XS::set_type NOSUCHOBJECT , \&_process_nosuchobject; |
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Net::SNMP::XS::set_type NOSUCHINSTANCE , \&_process_nosuchinstance; |
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Net::SNMP::XS::set_type ENDOFMIBVIEW , \&_process_endofmibview; |
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Net::SNMP::XS::set_type GET_REQUEST , \&_process_get_request; |
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Net::SNMP::XS::set_type GET_NEXT_REQUEST , \&_process_get_next_request; |
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Net::SNMP::XS::set_type GET_RESPONSE , \&_process_get_response; |
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Net::SNMP::XS::set_type SET_REQUEST , \&_process_set_request; |
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Net::SNMP::XS::set_type TRAP , \&_process_trap; |
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Net::SNMP::XS::set_type GET_BULK_REQUEST , \&_process_get_bulk_request; |
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Net::SNMP::XS::set_type INFORM_REQUEST , \&_process_inform_request; |
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Net::SNMP::XS::set_type SNMPV2_TRAP , \&_process_v2_trap; |
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Net::SNMP::XS::set_type REPORT , \&_process_report; |
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} |
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1; |
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=head1 AUTHOR |
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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=cut |
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