similar to: How to know if packet is dropped by kernel for udp checksum mismatch

i've this udp daemon which is waiting for an incoming udp datagram. now i want test this daemon for random garbage to test how it behaves. My udp daemon is running because its shows on netstat. problem is if i issue following command for putting udp datagram : $nc -uvvz <host> <port> it does not output any thing. i have straced the udp daemon. which does not returns from recv()

I have tried to set up app_rxfax to receive faxes over IP. I realise there are mixed stories about how reliable this is at the best of times, but at this point all I'm after is some guidance in interpreting the log below. What does "RTP: Received packet with bad UDP checksum" suggest? Here is the full log: -- Executing SetVar("SIP/0892130888-b27c",

I was just on 70minute call (IAX2 -> Internet -> IAX2) and during that time I heard several "pops", or "clicks". Each time it happened, I saw the following message: Aug 19 15:36:36 NOTICE[1173711792]: rtp.c:429 ast_rtp_read: RTP: Received packet with bad UDP checksum Any ideas what causes these, and why they turn in to a "pop", instead of just silence, or a

This question is not about linux usage. But still i think user list is a good crowd for linux programmer. So here it goes. I have this libnetfilter_queue application which receives packets from kernel based on some iptables rule. Before going straight to my problem, i'm giving a sample workable code and other tools to set up a test environment so that We problem definition and possible

We have a customer trying to dial through our server, and our server is throwing tons of these log messages: Jul 27 14:21:02 NOTICE[29210]: rtp.c:431 ast_rtp_read: RTP: Received packet with bad UDP checksum Is it pretty certain, that these are caused by a bad or misconfigured router along the path, or something else network-related? As opposed to the SIP hardware itself? The SIP ATA is the same

Pasi, in http://readlist.com/lists/lists.xensource.com/xen-users/10/50495.html you mention a netback fix without identifying which one. In going over the changes as well as looking at the code, I can''t spot anything related, or see how non-TCP, non-UDP packets could pass checksum_setup(), and hence I don''t really understand how this problem can be considered fixed (for, in the

Dear list members (especially Xen network wizards), I''m using the netfilter_queue mechanism to modify packets on the wire that are sent from one domU to another while they travel over the dom0 bridge. This has worked fine as long as I was tinkering with UDP packets only - but when I try to reinject TCP frames with an increased length, I run into a BUG() because

The other thread brought to my attention that only the <email> syntax obfuscates mailto links. Plus, while the entity encoding technique probably fools some scrapers, I doubt it's all that effective. Even Gruber uses the Hivelogic Enkoder [1]. So, what are people using for obfuscation and are you using any scripting or automation (filter that takes a pass before or after Markdown) to

Hi Nikolay, I have some query on multicast. When streams running on an STA and STA disconnected due to some reason. So, until the MDB is timed out the stream will be forwarded to the port and in turn to the driver and dropps there as no such STA. So, is the multicast_eht handling this scenario to take any action immediately? If not, can we do this to take quick action to reduce overhead of

On 20/03/2023 13:45, Ujjal Roy wrote: > Hi Nikolay, > > I have some query on multicast. When streams running on an STA and STA > disconnected due to some reason. So, until the MDB is timed out the > stream will be forwarded to the port and in turn to the driver and > dropps there as no such STA. > > So, is the multicast_eht handling this scenario to take any action >

Dear OpenSSH team, First of all thanks a lot for your good work on developing such a usable peace of software. Nice job. As you may know, we have some issues using OpenSSH in Iran. Recently the government did some packet filtering on some protocols, including SSH. We don't know what exactly they've done but it appears to be some routing rule that prevents SSH protocol to initiate a

Hi Nik, Flushing MDB can only be done when we are managing it per station not per port. For that we need to have MCAST_TO_UCAST, EHT and FAST_LEAVE. Here one more point is - some vendors may offload MCAST_TO_UCAST conversion in their own FW to reduce CPU. So, the best way is to have MCAST_TO_UCAST enabled and MDB will become per station, so we can delete MDB on disconnect. Shall, I create one

Hi, I'm running a simple test from asterisk towards a public telco switch (AXE10) over E100P. Here is the test case: 1) 30 calls are setup simultainously, 20 sec ringing time. 2) no calls answers (just calling a vacant public tax office :=) 3) Each channel will continue on its own with the same proceedure: ring for 20 sec, then hangup, ring for 20 sec, and so on. Of course this leads to

Dear All, recently our customer met some udp checksum error in v40z, we have done below testing: Sending: v40z, solaris 10 update 2 with 125121-03 patch receiving: v40z with solaris 10 update 2 and a PC-server with windows 2 receiving host connect in the same network switch. in sending v40z, we set ip:dohwcksum=0 in /etc/system. The sending peer send out packets at about 40M/s, the windows

Hi folks, I'm maintaining the darwinports port of rsync and I encountered the following strange thing: I updated our port which contains a md5 checksum on 27. April 16:36 GMT. Then some people had successfull builds (meaning the checksum was valid). But now its not anymore, it changed. I had a look at rsync-2.6.1.tar.gz from ftp://sunsite.auc.dk/pub/unix/rsync/ and the md5 still matches

Matt, The LLVMCore library provides constant folding automatically. So, when your obfuscated module is read in and the assembler re-creates your constants, the arithmetic is done automatically and the constants are folded. To see where this is done, see lib/VMCore/ConstantFold.cpp Reid. On Thu, 2007-12-13 at 02:22 -0600, Matt Fredrikson wrote: > Hello all, > > I am implementing some

Hi all, I'm working on usability and accessibility for a project that uses Markdown. When I tried out a screenreader on the automatic e-mail links, I noticed that there's nothing there semantically due to obfuscation. I think that obfuscation in this way is a neat feature, I hadn't heard about it before. This would be even better if there was a way to both obfuscate e-mail

Hello, Just did a fresh install of xen-4.0 and using the 2.6.31.13 dom0 kernel. I have 6 linux debian guests running, and on my host console i am getting these errors rolling pretty constantly. "Attempting to checksum a non-TCP/UDP packet, dropping a protocol 1 packet" I tried doing the ethtool -K eth0 tx off and same thing on peth0, using bridged mode for network config. Any tips?

Hello, Just did a fresh install of xen-4.0 and using the 2.6.31.13 dom0 kernel. I have 6 linux debian guests running, and on my host console i am getting these errors rolling pretty constantly. "Attempting to checksum a non-TCP/UDP packet, dropping a protocol 1 packet" I tried doing the ethtool -K eth0 tx off and same thing on peth0, using bridged mode for network config. Any tips?

Hello all, I am implementing some simple obfuscation transformations in LLVM. One of the obfuscations involves searching for particular constants, and "unrolling" them throughout a procedure using arithmetic. In effect, certain constants are broken up into smaller constants and recombined as needed using the appropriate operators. I perform this on intermediate LLVM instructions. After