netpacket::icmp(3pm) [debian man page]
NetPacket::ICMP(3pm) User Contributed Perl Documentation NetPacket::ICMP(3pm) NAME
NetPacket::ICMP - Assemble and disassemble ICMP (Internet Control Message Protocol) packets. VERSION
version 1.3.0 SYNOPSIS
use NetPacket::ICMP; $icmp_obj = NetPacket::ICMP->decode($raw_pkt); $icmp_pkt = NetPacket::ICMP->encode(); $icmp_data = NetPacket::ICMP::strip($raw_pkt); DESCRIPTION
"NetPacket::ICMP" provides a set of routines for assembling and disassembling packets using ICMP (Internet Control Message Protocol). Methods "NetPacket::ICMP->decode([RAW PACKET])" Decode the raw packet data given and return an object containing instance data. This method will quite happily decode garbage input. It is the responsibility of the programmer to ensure valid packet data is passed to this method. "NetPacket::ICMP->encode()" Return an ICMP packet encoded with the instance data specified. Functions "NetPacket::ICMP::strip([RAW PACKET])" Return the encapsulated data (or payload) contained in the ICMP packet. Instance data The instance data for the "NetPacket::ICMP" object consists of the following fields. type The ICMP message type of this packet. code The ICMP message code of this packet. cksum The checksum for this packet. data The encapsulated data (payload) for this packet. Exports default none exportable ICMP message types: ICMP_ECHOREPLY ICMP_UNREACH ICMP_SOURCEQUENCH ICMP_REDIRECT ICMP_ECHO ICMP_ROUTERADVERT ICMP_ROUTERSOLICIT ICMP_TIMXCEED ICMP_PARAMPROB ICMP_TSTAMP ICMP_TSTAMPREPLY ICMP_IREQ ICMP_IREQREPLY ICMP_MASKREQ ICMP_MASKREPLY tags The following tags group together related exportable items. ":types" ICMP_ECHOREPLY ICMP_UNREACH ICMP_SOURCEQUENCH ICMP_REDIRECT ICMP_ECHO ICMP_ROUTERADVERT ICMP_ROUTERSOLICIT ICMP_TIMXCEED ICMP_PARAMPROB ICMP_TSTAMP ICMP_TSTAMPREPLY ICMP_IREQ ICMP_IREQREPLY ICMP_MASKREQ ICMP_MASKREPLY ":strip" Import the strip function "icmp_strip". ":ALL" All the above exportable items. EXAMPLE
The following example prints the ICMP type, code, and checksum fields. #!/usr/bin/perl -w use strict; use Net::PcapUtils; use NetPacket::Ethernet qw(:strip); use NetPacket::IP qw(:strip); use NetPacket::ICMP; sub process_pkt { my ($user, $hdr, $pkt) = @_; my $ip_obj = NetPacket::IP->decode(eth_strip($pkt)); my $icmp_obj = NetPacket::ICMP->decode(ip_strip($ip_obj)); print("Type: $icmp_obj->{type} "); print("Code: $icmp_obj->{code} "); print("Checksum: $icmp_obj->{cksum} "); } Net::PcapUtils::loop(&process_pkt, FILTER => 'icmp'); TODO
Create constants COPYRIGHT
Copyright (c) 2001 Tim Potter and Stephanie Wehner. Copyright (c) 1995,1996,1997,1998,1999 ANU and CSIRO on behalf of the participants in the CRC for Advanced Computational Systems ('ACSys'). This module is free software. You can redistribute it and/or modify it under the terms of the Artistic License 2.0. This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. AUTHOR
Tim Potter <tpot@samba.org> Stephanie Wehner <atrak@itsx.com> perl v5.14.2 2011-11-20 NetPacket::ICMP(3pm)
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NetPacket::IGMP(3pm) User Contributed Perl Documentation NetPacket::IGMP(3pm) NAME
NetPacket::IGMP - Assemble and disassemble IGMP (Internet Group Mangement Protocol) packets. VERSION
version 1.3.0 SYNOPSIS
use NetPacket::IGMP; $igmp_obj = NetPacket::IGMP->decode($raw_pkt); $igmp_pkt = NetPacket::IGMP->encode(params...); # Not implemented $igmp_data = NetPacket::IGMP::strip($raw_pkt); DESCRIPTION
"NetPacket::IGMP" provides a set of routines for assembling and disassembling packets using IGMP (Internet Group Mangement Protocol). Methods "NetPacket::IGMP->decode([RAW PACKET])" Decode the raw packet data given and return an object containing instance data. This method will quite happily decode garbage input. It is the responsibility of the programmer to ensure valid packet data is passed to this method. "NetPacket::IGMP->encode(param => value)" Return an IGMP packet encoded with the instance data specified. Not implemented. Functions "NetPacket::IGMP::strip([RAW PACKET])" Return the encapsulated data (or payload) contained in the IGMP packet. This function returns undef as there is no encapsulated data in an IGMP packet. Instance data The instance data for the "NetPacket::IGMP" object consists of the following fields. version The IGMP version of this packet. type The message type for this packet. len The length (including length of header) in bytes for this packet. subtype The message subtype for this packet. cksum The checksum for this packet. group_addr The group address specified in this packet. data The encapsulated data (payload) for this packet. Exports default none exportable IGMP_VERSION_RFC998 IGMP_VERSION_RFC1112 IGMP_HOST_MQUERY IGMP_HOST_MREPORT IGMP_IP_NO_HOSTS IGMP_IP_ALL_HOSTS IGMP_IP_ALL_ROUTERS tags The following tags group together related exportable items. ":strip" Import the strip function "igmp_strip". ":versions" IGMP_VERSION_RFC998 IGMP_VERSION_RFC1112 ":msgtypes" IGMP_HOST_MQUERY IGMP_HOST_MREPORT ":group_addrs" IGMP_IP_NO_HOSTS IGMP_IP_ALL_HOSTS IGMP_IP_ALL_ROUTERS ":ALL" All the above exportable items. EXAMPLE
The following script dumps UDP frames by IP address and UDP port to standard output. #!/usr/bin/perl -w use strict; use Net::PcapUtils; use NetPacket::Ethernet qw(:strip); use NetPacket::IP; use NetPacket::IGMP; sub process_pkt { my($arg, $hdr, $pkt) = @_; my $ip_obj = NetPacket::IP->decode(eth_strip($pkt)); my $igmp_obj = NetPacket::IGMP->decode($ip_obj->{data}); print("$ip_obj->{src_ip} -> $ip_obj->{dest_ip} ", "$igmp_obj->{type}/$igmp_obj->{subtype} ", "$igmp_obj->{group_addr} "); } Net::PcapUtils::loop(&process_pkt, FILTER => 'igmp'); TODO
Implement encode() function COPYRIGHT
Copyright (c) 2001 Tim Potter. Copyright (c) 1995,1996,1997,1998,1999 ANU and CSIRO on behalf of the participants in the CRC for Advanced Computational Systems ('ACSys'). This module is free software. You can redistribute it and/or modify it under the terms of the Artistic License 2.0. This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. AUTHOR
Tim Potter <tpot@samba.org> perl v5.14.2 2011-11-20 NetPacket::IGMP(3pm)