1 |
root |
1.1 |
=head1 NAME |
2 |
|
|
|
3 |
|
|
Net::FPing - quickly ping a large number of hosts |
4 |
|
|
|
5 |
|
|
=head1 SYNOPSIS |
6 |
|
|
|
7 |
|
|
use Net::FPing; |
8 |
|
|
|
9 |
|
|
=head1 DESCRIPTION |
10 |
|
|
|
11 |
|
|
This module was written for a signle purpose only: sendinf ICMP EHCO |
12 |
|
|
REQUEST packets as quickly as possible to a large number of hosts |
13 |
|
|
(thousands to millions). |
14 |
|
|
|
15 |
|
|
It employs a sending thread and is fully event-driven (using AnyEvent), so |
16 |
|
|
you have to run an event model supported by AnyEvent to use this module. |
17 |
|
|
|
18 |
|
|
Receiving and processing reply packets is not currently supported by this |
19 |
|
|
module. |
20 |
|
|
|
21 |
root |
1.3 |
=head1 FUNCTIONS |
22 |
|
|
|
23 |
root |
1.1 |
=over 4 |
24 |
|
|
|
25 |
|
|
=cut |
26 |
|
|
|
27 |
|
|
package Net::FPing; |
28 |
|
|
|
29 |
root |
1.3 |
use strict; |
30 |
|
|
no warnings; |
31 |
|
|
|
32 |
root |
1.1 |
use AnyEvent; |
33 |
|
|
|
34 |
|
|
BEGIN { |
35 |
root |
1.3 |
our $VERSION = '0.01'; |
36 |
|
|
our @ISA = qw(Exporter); |
37 |
root |
1.1 |
|
38 |
|
|
require Exporter; |
39 |
root |
1.3 |
#Exporter::export_ok_tags (keys %EXPORT_TAGS); |
40 |
root |
1.1 |
|
41 |
|
|
require XSLoader; |
42 |
root |
1.3 |
XSLoader::load (__PACKAGE__, $VERSION); |
43 |
root |
1.1 |
} |
44 |
|
|
|
45 |
root |
1.3 |
our ($THR_REQ_FD, $THR_RES_FD, $ICMP4_FD, $ICMP6_FD); |
46 |
|
|
|
47 |
root |
1.1 |
our $THR_REQ_FH; open $THR_REQ_FH, ">&=$THR_REQ_FD" or die "FATAL: cannot fdopen"; |
48 |
|
|
our $THR_RES_FH; open $THR_RES_FH, "<&=$THR_RES_FD" or die "FATAL: cannot fdopen"; |
49 |
|
|
|
50 |
|
|
our $THR_REQ_W; |
51 |
|
|
our $THR_RES_W = AnyEvent->io (fh => $THR_RES_FH, poll => 'r', cb => sub { |
52 |
|
|
my $sv = _read_res |
53 |
|
|
or return; |
54 |
|
|
|
55 |
|
|
$sv->(); |
56 |
|
|
}); |
57 |
|
|
|
58 |
root |
1.3 |
our $THR_REQ_BUF; |
59 |
root |
1.1 |
|
60 |
|
|
sub _send_req($) { |
61 |
|
|
$THR_REQ_BUF .= $_[0]; |
62 |
|
|
|
63 |
|
|
$THR_REQ_W ||= AnyEvent->io (fh => $THR_REQ_FH, poll => 'w', cb => sub { |
64 |
|
|
my $len = syswrite $THR_REQ_FH, $THR_REQ_BUF; |
65 |
|
|
substr $THR_REQ_BUF, 0, $len, ""; |
66 |
|
|
|
67 |
|
|
undef $THR_REQ_W unless length $THR_REQ_BUF; |
68 |
|
|
}); |
69 |
|
|
} |
70 |
|
|
|
71 |
root |
1.2 |
=item Net::FPing::ipv4_supported |
72 |
|
|
|
73 |
|
|
Returns true if IPv4 is supported in this module and on this system. |
74 |
|
|
|
75 |
|
|
=item Net::FPing::ipv6_supported |
76 |
|
|
|
77 |
|
|
Returns true if IPv6 is supported in this module and on this system. |
78 |
|
|
|
79 |
|
|
=item Net::FPing::ipv4_pktsize |
80 |
|
|
|
81 |
|
|
Returns the number of bytes each IPv4 ping packet has. |
82 |
|
|
|
83 |
|
|
=item Net::FPing::ipv6_pktsize |
84 |
|
|
|
85 |
|
|
Returns the number of bytes each IPv4 ping packet has. |
86 |
|
|
|
87 |
|
|
=item Net::FPing::icmp_ping [ranges...], $send_interval, $payload, \&callback |
88 |
root |
1.1 |
|
89 |
|
|
Ping the given IPv4 address ranges. Each range is an arrayref of the |
90 |
|
|
form C<[lo, hi, interval]>, where C<lo> and C<hi> are octet strings with |
91 |
|
|
either 4 octets (for IPv4 addresses) or 16 octets (for IPV6 addresses), |
92 |
|
|
representing the lowest and highest address to ping (you can convert a |
93 |
|
|
dotted-quad IPv4 address to this format by using C<inet_aton $address>. The |
94 |
|
|
range C<interval> is the minimum time in seconds between pings to the |
95 |
|
|
given range. If omitted, defaults to C<$send_interval>. |
96 |
|
|
|
97 |
|
|
The C<$send_interval> is the minimum interval between sending any two |
98 |
|
|
packets and is a way to make an overall rate limit. If omitted, pings will |
99 |
|
|
be send as fast as possible. |
100 |
|
|
|
101 |
|
|
The C<$payload> is a 32 bit integer given as the ICMP ECHO REQUEST ident |
102 |
|
|
and sequence numbers (in unspecified order :). |
103 |
|
|
|
104 |
|
|
The request will be queued and all requests will be served by a background |
105 |
|
|
thread in order. When all ranges have been pinged, the C<callback> will be |
106 |
|
|
called. |
107 |
|
|
|
108 |
|
|
Algorithm: Each range has an associated "next time to send packet" |
109 |
|
|
time. The algorithm loops as long as there are ranges with hosts to be |
110 |
|
|
pinged and always serves the range with the most urgent packet send |
111 |
|
|
time. It will at most send one packet every C<$send_interval> seconds. The |
112 |
|
|
algorithm to send each packet is O(log n) on the number of ranges, so even |
113 |
root |
1.2 |
a large number of ranges (many thousands) is managable. No storage is |
114 |
|
|
allocated per address. |
115 |
root |
1.1 |
|
116 |
root |
1.3 |
Performance: On my 2 GHz Opteron system with a pretty average nvidia |
117 |
root |
1.1 |
gigabit network card I can ping around 60k to 200k adresses per second, |
118 |
|
|
depending on routing decisions. |
119 |
|
|
|
120 |
|
|
Example: ping 10.0.0.1-10.0.0.15 with at most 100 packets/s, and |
121 |
|
|
11.0.0.1-11.0.255.255 with at most 1000 packets/s. Do not, however, exceed |
122 |
root |
1.2 |
1000 packets/s overall: |
123 |
root |
1.1 |
|
124 |
root |
1.3 |
my $done = AnyEvent->condvar; |
125 |
|
|
|
126 |
root |
1.2 |
Net::FPing::icmp_ping |
127 |
root |
1.1 |
[v10.0.0.1, v10.0.0.15, .01], |
128 |
|
|
[v11.0.0.1, v11.0.255.255, .001], |
129 |
|
|
.001, 0x12345678, |
130 |
|
|
sub { |
131 |
|
|
warn "all ranges pinged\n"; |
132 |
root |
1.3 |
$done->broadcast; |
133 |
root |
1.1 |
} |
134 |
|
|
; |
135 |
|
|
|
136 |
root |
1.3 |
$done->wait; |
137 |
|
|
|
138 |
root |
1.1 |
=cut |
139 |
|
|
|
140 |
root |
1.2 |
sub icmp_ping($$$&) { |
141 |
|
|
_send_req _req_icmp_ping @_; |
142 |
root |
1.1 |
} |
143 |
|
|
|
144 |
|
|
our $ICMP4_FH; |
145 |
|
|
our $ICMP4_W = (open $ICMP4_FH, "<&=$ICMP4_FD") && AnyEvent->io (fh => $ICMP4_FH, poll => 'r', cb => \&_recv_icmp4); |
146 |
|
|
our $ICMP6_FH; |
147 |
|
|
our $ICMP6_W = (open $ICMP6_FH, "<&=$ICMP6_FD") && AnyEvent->io (fh => $ICMP6_FH, poll => 'r', cb => \&_recv_icmp6); |
148 |
|
|
|
149 |
root |
1.2 |
1; |
150 |
root |
1.1 |
|
151 |
root |
1.2 |
=back |
152 |
root |
1.1 |
|
153 |
root |
1.2 |
=head1 BUGS AND SHORTCOMINGS |
154 |
root |
1.1 |
|
155 |
root |
1.2 |
- replies are not yet accessible. |
156 |
|
|
- ipv6 support has never ever been tested. |
157 |
root |
1.1 |
|
158 |
|
|
=head1 AUTHOR |
159 |
|
|
|
160 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
161 |
|
|
http://home.schmorp.de/ |
162 |
|
|
|
163 |
|
|
=head1 AUTHOR |
164 |
|
|
|
165 |
|
|
This software is distributed under the GENERAL PUBLIC LICENSE, |
166 |
|
|
version 2 or any later. |
167 |
|
|
|
168 |
|
|
=cut |
169 |
|
|
|