Re: Net::RawIP - invalid checksum ?

I don't have tcpdump installed, so I don't know that I can check it. But would the following possibly work

use Net::RawIP;

my $packet = new Net::RawIP();

$packet->set({
        ip => {
                saddr => "192.168.10.10",
                daddr => "192.168.10.20"
            },
        udp => {
               check => 0,
               source => 6544,
               dest => 514,
               data => 'test123'
            }
        });
[download]

HTH

--Chris

Hey. I'm not completely useless. I can be used as a bad example.

Comment on Re: Net::RawIP - invalid checksum ? Download Code

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Re^2: Net::RawIP - invalid checksum ? by willambender (Initiate) on Dec 06, 2013 at 21:10 UTC
Negitive. I now get.. (Defaults to TCP, src/dst ports are now 0) `14:46:44.553547 IP (tos 0x0, ttl 60, id 35744, offset 0, flags [DF], p +roto TCP (6), length 40) 192.168.10.10.0 > 192.168.10.20.0: Flags [DF], cksum 0xcd50 (incor +rect -> 0xd550), seq 0, win 65535, length 0` [download] If i use your example and just change... `my $packet = new Net::RawIP({udp => {check => 0}});` [download] Or even.. `my $packet = new Net::RawIP({udp => {}});` [download] I still get a bad checkdum... `4:47:22.542872 IP (tos 0x0, ttl 60, id 35885, offset 0, flags [DF], pr +oto UDP (17), length 35) 192.168.10.10.6544 > 192.168.10.20.514: [bad udp cksum 0xb59d -> 0 +xbd9d!] [\|syslog]` [download] -Will	[reply] [d/l] [select]
Re^3: Net::RawIP - invalid checksum ? by taint (Chaplain) on Dec 06, 2013 at 22:11 UTC
Well. Like I said, I couldn't test it. I was just trying to help with a possible alternative. I notice after reading both the docs, and source. There's precious little, regarding the check option. OTOH I notice `Net::RawIP::opt` and `Net::RawIP::udphdr` Perhaps experimenting with them, might yield some positive results? Just a thought. Not being able to test it myself. I'm afraid that's all I got. Best wishes --Chris Hey. I'm not completely useless. I can be used as a bad example.	[reply]
Re^4: Net::RawIP - invalid checksum ? by willambender (Initiate) on Dec 06, 2013 at 22:18 UTC
Thanks, i appreciate any help i can get on this. :) I'll definitely take a look at those other options and post back with my findings. Thanks again. - Will	[reply]