Hello,

network sniffers (such as wireshark, ngrep, tcpdump, sngrep, ...) capture the traffic at network interface layer (well, using some kernel hooks), before getting to application layer (even before the firewall) and I expect is the same for heplify. They do not "receive" the packets like an application that does "listen", just take a copy of the traffic via those kernel hooks and then the packets are sent to the application layer. In other words, heplify doesn't received the sip traffic and then resends it locally, just gets a copy of the traffic.

Cheers,
Daniel

On 27.10.19 09:16, Igor Olhovskiy wrote:
So, at the end it would be like 
Heplify captures traffic and sending it to localhost, where Kamailio listens. 
Thanks, will give it a try. 

Regards, Igor
On 26 Oct 2019, 21:21 +0200, Federico Cabiddu <federico.cabiddu@gmail.com>, wrote:
Just use heplify or captagent for this:
https://github.com/sipcapture/heplify

https://github.com/sipcapture/captagent
You can run them on the same machines where you're running your sip services and send the captured traffic to a homer instance. 

Cheers, 

Federico 

On Sat, 26 Oct 2019, 20:40 Igor Olhovskiy, <igorolhovskiy@gmail.com> wrote:
I'm trying to avoid SIP packet touching at all. Plus, I can't move third-party soft to other port/interface or so.

Idea is I don't want for Kamailio to be a proxy, but a sip packet analyzer for mirrored port, but on same machine.

On Oct 26 2019, at 6:40 pm, David Villasmil <david.villasmil.work@gmail.com> wrote:
Why not just receiving with kamailio and transparently proxying to the pbx after capturing? I.e.: kamailio in the middle

On Sat, 26 Oct 2019 at 14:46, Igor Olhovskiy <igorolhovskiy@gmail.com> wrote:
Hi!

I'm trying to get Kamailio working as a traffic capture on a same machine with other PBX software installed.

Actually, traffic is mirrored with

iptables -A PREROUTING -t mangle -i eth0 -p udp --dport 5060 -j TEE --gateway 127.0.0.2
iptables -t nat -A PREROUTING -d 127.0.0.2 -p udp --dport 5060 -j DNAT --to 127.0.0.1:5062

Kamailio request route is super simple
request_route {
    xlog("L_ALERT", "[SIP-PACKET] Got packet [F=$fu R=$ru D=$du M=$rm IP=($si:$sp $Ri:$Rp) ID=$ci]\n");
    drop;
}

I was trying to get Kamailio just listen on interface 127.0.0.1:5062, but no luck

listen=udp:127.0.0.1:5062

Next was to use sipcapture module with following parameters

loadmodule "sipcapture.so"
modparam("sipcapture", "db_url", "text:///tmp/")
modparam("sipcapture", "raw_socket_listen", "127.0.0.1:5060-5062")
modparam("sipcapture", "raw_interface", "lo")
modparam("sipcapture", "promiscious_on", 1)

Also no luck. Means Kamailio can't see packets, but I see em with wireshark on lo interface.

What is best way to get it working? Or I'm missing something?

Thanks!
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