NAME¶
Net::Libdnet - binding for Dug Song's libdnet
SYNOPSIS¶
#
# This will just import every functions and constants
#
use Net::Libdnet;
#
# Network interface manipulation
#
# !!! ADVICE: you should use Net::Libdnet::Intf instead
#
use Net::Libdnet qw(:intf);
my $intf = dnet_intf_open();
my $eth = dnet_intf_get($intf, { intf_name => 'eth0' });
print "IP: ".$eth->{intf_addr}."\n";
print "MAC: ".$eth->{intf_link_addr}."\n";
my $dst = dnet_intf_get_dst($intf, '192.168.0.10');
print "Name: ".$dst->{intf_name}."\n";
print "IP: ".$dst->{intf_addr}."\n";
print "MAC: ".$dst->{intf_link_addr}."\n";
my $src = dnet_intf_get_src($intf, '192.168.0.1');
print "Name: ".$src->{intf_name}."\n";
print "IP: ".$src->{intf_addr}."\n";
print "MAC: ".$src->{intf_link_addr}."\n";
dnet_intf_close($intf);
#
# Arp cache manipulation
#
# !!! ADVICE: you should use Net::Libdnet::Arp instead
#
use Net::Libdnet qw(:arp);
my $arp = dnet_arp_open();
my $entry = dnet_arp_get($arp, {arp_pa => '10.0.0.1'});
print "MAC: ".$entry->{arp_ha}."\n";
dnet_arp_add ($arp,
{arp_ha => '00:11:22:33:44:55', arp_pa => '10.0.0.10'});
dnet_arp_delete($arp,
{arp_ha => '00:11:22:33:44:55', arp_pa => '10.0.0.10'});
dnet_arp_close($arp);
#
# Route table manipulation
#
# !!! ADVICE: you should use Net::Libdnet::Route instead
#
use Net::Libdnet qw(:route);
my $route = dnet_route_open();
dnet_route_add ($route,
{route_gw => '10.0.0.1', route_dst => '192.168.0.1'});
dnet_route_delete($route,
{route_gw => '10.0.0.1', route_dst => '192.168.0.1'});
my $get = dnet_route_get($route, {route_dst => '192.168.0.10'});
print "GW: ".$get->{route_gw}."\n";
dnet_route_close($route);
#
# Firewall rules manipulation
#
# !!! ADVICE: you should use Net::Libdnet::Fw instead
#
use Net::Libdnet qw(:fw :consts);
my $fw = dnet_fw_open();
# This is quite complex. This rule blocks TCP as input to 10.0.0.1
# You should really use Net::Libdnet::Fw instead.
dnet_fw_add ($fw,
{fw_op => FW_DIR_IN, fw_proto => 6, fw_dst => '10.0.0.1'});
dnet_fw_delete($fw,
{fw_op => FW_DIR_IN, fw_proto => 6, fw_dst => '10.0.0.1'});
dnet_fw_close($fw);
#
# Send at IP level
#
# !!! ADVICE: you should use Net::Libdnet::Ip instead
#
use Net::Libdnet qw(:ip);
my $ip = dnet_ip_open();
my $raw = "\x47\x47\x47\x47";
dnet_ip_send($ip, $raw, length($raw));
dnet_ip_close($ip);
#
# Send at Ethernet level
#
# !!! ADVICE: you should use Net::Libdnet::Eth instead
#
use Net::Libdnet qw(:eth);
my $eth = dnet_eth_open('eth0');
dnet_eth_send($eth, $raw, length($raw));
dnet_eth_close($eth);
#
# Traffic interception
#
# !!! ADVICE: you should use Net::Libdnet::Tun instead
#
use Net::Libdnet qw(:tun);
my $tun = dnet_tun_open('10.0.0.10', '192.168.0.10', 1500);
my $buf = dnet_tun_recv($tun, 1500);
# Do stuff with $buf
dnet_tun_send($tun, $buf, length($buf));
dnet_tun_close($tun);
#
# hash refs in dnet format
#
my $intf = {
intf_alias_num => 1,
intf_mtu => 1500,
intf_len => 112,
intf_type => 6,
intf_name => 'eth0',
intf_dst_addr => undef,
intf_link_addr => '00:11:22:33:44:55',
intf_flags => 49,
intf_addr => '10.100.0.10/24',
intf_alias_addrs => [ 'fe80::211:2ff:fe33:4455/64' ]
};
my $arp = {
arp_pa => '10.100.0.1',
arp_ha => '11:22:33:44:55:66'
};
my $route = {
route_gw => '10.100.0.1',
route_dst => '0.0.0.0/0'
};
my $fw = {
fw_dir => 2,
fw_sport => [ 0, 0 ],
fw_dport => [ 0, 0 ],
fw_src => '0.0.0.0/0',
fw_dst => '0.0.0.0/0',
fw_proto => 6,
fw_device => 'eth0',
fw_op => 2
};
DESCRIPTION¶
Net::Libdnet provides a simplified, portable interface to several low-level
networking routines, including network address manipulation, kernel arp cache
and route table lookup and manipulation, network firewalling, network
interface lookup and manipulation, network traffic interception via tunnel
interfaces, and raw IP packet and Ethernet frame transmission. It is intended
to complement the functionality provided by libpcap.
All the original and obsolete functions return
undef and print a warning
message to the standard error when a problem occurs. The obsolete functions
are:
addr_cmp,
addr_bcast,
addr_net,
arp_add,
arp_delete,
arp_get,
intf_get,
intf_get_src,
intf_get_dst,
route_add,
route_delete,
route_get.
These obsolete functions will continue to work, to keep backward compatibility,
but should not be used anymore. The new APIs should be preferred. There are
two new APIs, one is the low-level one, matching libdnet functions, and the
other one is a high-level API, matching a more Perl object oriented
programming. This latest one is highly preferred.
Net::Libdnet module implements the low-level API. The high-level API is
accessible by using the following modules:
Net::Libdnet::Intf,
Net::Libdnet::Route,
Net::Libdnet::Fw,
Net::Libdnet::Arp,
Net::Libdnet::Eth,
Net::Libdnet::Ip and
Net::Libdnet::Tun.
WHAT IS IMPLEMENTED¶
- Network addressing
- Nothing as of now.
- Address Resolution Protocol
- All functions: arp_open, arp_add, arp_delete, arp_get,
arp_loop, arp_close.
- Binary buffers
- Nothing as of now.
- Ethernet
- All functions: eth_open, eth_get, eth_set, eth_send,
eth_close.
- Firewalling
- All functions: fw_open, fw_add, fw_delete, fw_loop,
fw_close.
- Network interface
- All functions: intf_open, intf_get_set, intf_get_dst,
intf_set, intf_loop, intf_close.
- Internet Protocol
- All functions: ip_open, ip_checksum, ip_send, ip_close.
Except: ip_add_option.
- Internet Protocol Version 6
- Nothing as of now.
- Random number generation
- Nothing as of now.
- Routing
- All functions: route_open, route_add, route_delete,
route_get, route_loop, route_close.
- Tunnel interface
- All functions: tun_open, tun_fileno, tun_name, tun_send,
tun_recv, tun_close.
SUBROUTINES¶
- dnet_intf_open ()
- Opens an interface handle. Returns a handle on success,
undef on error.
- dnet_intf_get (scalar, hashref)
- Takes an intf handle, and a hash ref in dnet format as
parameters. Returns a hash in dnet format on success, undef on error.
- dnet_intf_get_src (scalar, scalar)
- Takes an intf handle, and an IP address as parameters.
Returns a hash in dnet format on success, undef on error.
- dnet_intf_get_dst (scalar, scalar)
- Takes an intf handle, and an IP address as parameters.
Returns a hash in dnet format on success, undef on error.
- dnet_intf_set (scalar, scalar)
- Takes an intf handle, and a hash ref in dnet format as
parameters. Returns 1 on success, undef on error.
- dnet_intf_loop (scalar, subref, scalarref)
- Takes an intf handle, a subref, and a scalar ref as
parameters. Returns 1 on success, undef on error. The subref will be
called with an intf hash ref in dnet format, and the scalar ref as
parameters.
- dnet_intf_close (scalar)
- Takes an intf handle as parameter. Returns the handle on
success, undef on error.
- dnet_route_open ()
- Opens a route handle. Returns a handle on success, undef on
error.
- dnet_route_add (scalar, hashref)
- Takes a route handle, and a hash ref in dnet format as
parameters. Returns 1 on success, undef on error.
- dnet_route_delete (scalar, hashref)
- Takes a route handle, and a hash ref in dnet format as
parameters. Returns 1 on success, undef on error.
- dnet_route_get (scalar, hashref)
- Takes a route handle, and a hash ref in dnet format as
parameters. Returns a hash ref in dnet format on success, undef on
error.
- dnet_route_loop (scalar, subref, scalarref)
- Takes a route handle, a subref, and a scalar ref as
parameters. Returns 1 on success, undef on error. The subref will be
called with a route hash ref in dnet format, and the scalar ref as
parameters.
- dnet_route_close (scalar)
- Takes a route handle as parameter. Returns the handle on
success, undef on error.
- dnet_arp_open ()
- Opens an arp handle. Returns a handle on success, undef on
error.
- dnet_arp_add (scalar, hashref)
- Takes an arp handle, and a hash ref in dnet format as
parameters. Returns 1 on success, undef on error.
- dnet_arp_delete (scalar, hashref)
- Takes an arp handle, and a hash ref in dnet format as
parameters. Returns 1 on success, undef on error.
- dnet_arp_get (scalar, hashref)
- Takes an arp handle, and a hash ref in dnet format as
parameters. Returns a hash ref in dnet format on success, undef on
error.
- dnet_arp_loop (scalar, subref, scalarref)
- Takes an arp handle, a subref, and a scalar ref as
parameters. Returns 1 on success, undef on error. The subref will be
called with an arp hash ref in dnet format, and the scalar ref as
parameters.
- dnet_arp_close (scalar)
- Takes an arp handle as parameter. Returns the handle on
success, undef on error.
- dnet_fw_open ()
- Opens a fw handle. Returns a handle on success, undef on
error.
- dnet_fw_add (scalar, hashref)
- Takes a fw handle, and a hash ref in dnet format as
parameters. Returns 1 on success, undef on error.
- dnet_fw_delete (scalar, hashref)
- Takes a fw handle, and a hash ref in dnet format as
parameters. Returns 1 on success, undef on error.
- dnet_fw_loop (scalar, subref, scalarref)
- Takes a fw handle, a subref, and a scalar ref as
parameters. Returns 1 on success, undef on error. The subref will be
called with a fw hash ref in dnet format, and the scalar ref as
parameters.
- dnet_fw_close (scalar)
- Takes a fw handle as parameter. Returns the handle on
success, undef on error.
- dnet_tun_open (scalar, scalar, scalar)
- Creates a tunnel between src and dst IP addresses. Captured
packets will have specified size. First argument is the source IP address,
second the destination IP address, and the third is the cpature size.
Returns a handle on success, undef on error.
- dnet_tun_fileno (scalar)
- Takes a tun handle as parameter. Returns the file number on
success, undef on error.
- dnet_tun_name (scalar)
- Takes a tun handle as parameter. Returns the interface name
on success, undef on error.
- dnet_tun_send (scalar, scalar, scalar)
- Takes a tun handle, the raw data to send, and its size as
parameters. Returns the number of bytes sent on success, undef on
error.
- dnet_tun_recv (scalar, scalar)
- Takes a tun handle, and the maximum size to read as
parameters. Returns the read buffer on success, undef on error.
- dnet_tun_close (scalar)
- Takes a tun handle as parameter. Returns the handle on
success, undef on error.
- dnet_eth_open (scalar)
- Opens an eth handle. Takes an interface name as parameter.
Returns a handle on success, undef on error.
- dnet_eth_get (scalar)
- Takes an eth handle as parameter. Returns the hardware
address of currently opened eth handle on success, undef on error.
- dnet_eth_set (scalar, scalar)
- Takes an eth handle, and the hardware address to set as
parameters. Returns 1 on success, undef on error.
- dnet_eth_send (scalar, scalar, scalar)
- Takes an eth handle, the raw data to send, and its size as
parameters. Returns the number of bytes sent on success, undef on
error.
- dnet_eth_close (scalar)
- Takes an eth handle as parameter. Returns the handle on
success, undef on error.
- dnet_ip_open ()
- Opens an ip handle. Returns a handle on success, undef on
error.
- dnet_ip_checksum (scalar, scalar)
- Takes a raw IPv4 frame as the first parameter, and its size
as a second parameter. It then updates the frame with the good checksum.
Returns nothing.
- dnet_ip_send (scalar, scalar, scalar)
- Takes an ip handle, the raw data to send, and its size as
parameters. Returns the number of bytes sent on success, undef on
error.
- dnet_ip_close (scalar)
- Takes an ip handle as parameter. Returns the handle on
success, undef on error.
OBSOLETE FUNCTIONS¶
They should not be used anymore. You have been warned.
- addr_bcast
- addr_cmp
- addr_net
- arp_add
- arp_delete
- arp_get
- intf_get
- intf_get_dst
- intf_get_src
- route_add
- route_delete
- route_get
CONSTANTS¶
- DNET_ADDR_TYPE_NONE
- DNET_ADDR_TYPE_ETH
- DNET_ADDR_TYPE_IP
- DNET_ADDR_TYPE_IP6
- DNET_FW_OP_ALLOW
- DNET_FW_OP_BLOCK
- DNET_FW_DIR_IN
- DNET_FW_DIR_OUT
- DNET_INTF_TYPE_OTHER
- DNET_INTF_TYPE_ETH
- DNET_INTF_TYPE_LOOPBACK
- DNET_INTF_TYPE_TUN
- DNET_INTF_FLAG_UP
- DNET_INTF_FLAG_LOOPBACK
- DNET_INTF_FLAG_POINTOPOINT
- DNET_INTF_FLAG_NOARP
- DNET_INTF_FLAG_BROADCAST
- DNET_INTF_FLAG_MULTICAST
COPYRIGHT AND LICENSE¶
You may distribute this module under the terms of the BSD license. See LICENSE
file in the source distribution archive.
Copyright (c) 2004, Vlad Manilici
Copyright (c) 2008-2011, Patrice <GomoR> Auffret
SEE ALSO¶
dnet(3)