| 1 | 1 | simandl | package HotSaNICmod::OSdep; |
| 2 | | | |
| 3 | | | sub version { |
| 4 | | | ($VERSION = '$Revision: 1.4 $') =~ s/.*(\d+\.\d+).*/$1/; |
| 5 | | | return "$^O.pm $VERSION"; |
| 6 | | | } |
| 7 | | | |
| 8 | | | sub sample { |
| 9 | | | my %args=@_; |
| 10 | | | |
| 11 | | | my @values=(0,0,0,0,0,0,0,0,0,0,0,0); |
| 12 | | | |
| 13 | | | open FILE,"/proc/net/tcp"; |
| 14 | | | while (<FILE>) { |
| 15 | | | (undef,undef,undef,$state)=split; |
| 16 | | | if ($state =~ /[0-9A-F]+/) { |
| 17 | | | if ($state =~ /^0/) { |
| 18 | | | $state =~ s/^0//; |
| 19 | | | if ($state eq "A") { $state=10; } |
| 20 | | | elsif ($state eq "B") { $state=11; } |
| 21 | | | elsif ($state !~ /[0-9]/) { $state=0; } |
| 22 | | | } |
| 23 | | | else { $state=0; } |
| 24 | | | $values[$state]++; |
| 25 | | | } |
| 26 | | | } |
| 27 | | | close FILE; |
| 28 | | | HotSaNICmod::do_rrd("connections","U",time,@values); |
| 29 | | | } |
| 30 | | | |
| 31 | | | 1; |
| 32 | | | |
| 33 | | | # known states: |
| 34 | | | # |
| 35 | | | # 01=ESTABLISHED 02=SYN_SENT 03=SYN_RECV 04=FIN_WAIT1 05=FIN_WAIT2 |
| 36 | | | # 06=TIME_WAIT 07=CLOSE 09=LAST_ACK 0A=LISTEN 0B=CLOSING |
| 37 | | | |
| 38 | | | # TODO: |
| 39 | | | # |
| 40 | | | # this module only stats local connections. |
| 41 | | | # |
| 42 | | | # to stat ALL (i.e. including masq'ed) connections: use /proc/net/ip_conntrack |
| 43 | | | # select all lines containing "tcp" as 1st keyword |
| 44 | | | # the connection state can be found in plaintext on pos. #4 |
| 45 | | | # |
| 46 | | | # ATTENTION: This stat also contains the connections to the local configured IPs! |
| 47 | | | # |
| 48 | | | # format of ip_conntrack: |
| 49 | | | # |
| 50 | | | # <proto> <proto#> <expire time (sec.)> <original source> <packet destination> <src port> <dst port> <expected return source> <expected return dest> <expected ret. src port> <expected ret. dst port> <use> |
| 51 | | | # |
| 52 | | | # for more details see: |
| 53 | | | # http://www.faqs.org/docs/iptables/theconntrackentries.html |
| 54 | | | # <kernel source tree>/net/ipv4/netfilter/ip_conntrack.c |
| 55 | | | # <kernel source tree>/include/linux/netfilter_ipv4/ip_conntrack.h |
| 56 | | | |
| 57 | | | |
