First Round Proxy Testing (proxy + sk_msg)

testing.txt

Using Socket proxy from -> https://github.com/astoycos/netns-proxy 

Native Socket redirction from -> https://github.com/astoycos/net-ebpf-playground/tree/demo/socket-redirection

1. No bpf redirection

```
[astoycos@localhost net-ebpf-playground]$ iperf3 -4 -c 192.168.122.91 -p 8789 
Connecting to host 192.168.122.91, port 8789
[  5] local 192.168.122.1 port 58868 connected to 192.168.122.91 port 8789
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  47.6 MBytes   399 Mbits/sec    0    290 KBytes       
[  5]   1.00-2.00   sec  46.5 MBytes   390 Mbits/sec    0    290 KBytes       
[  5]   2.00-3.00   sec  49.2 MBytes   413 Mbits/sec    0    290 KBytes       
[  5]   3.00-4.00   sec  48.2 MBytes   404 Mbits/sec    0    290 KBytes       
[  5]   4.00-5.00   sec  44.4 MBytes   372 Mbits/sec    0    290 KBytes       
[  5]   5.00-6.00   sec  48.4 MBytes   406 Mbits/sec    0    290 KBytes       
[  5]   6.00-7.00   sec  48.7 MBytes   408 Mbits/sec    0    290 KBytes       
[  5]   7.00-8.00   sec  45.1 MBytes   378 Mbits/sec    0    290 KBytes       
[  5]   8.00-9.00   sec  46.0 MBytes   386 Mbits/sec    0    290 KBytes       
[  5]   9.00-10.00  sec  46.2 MBytes   387 Mbits/sec    0    290 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   470 MBytes   394 Mbits/sec    0             sender
[  5]   0.00-10.00  sec   468 MBytes   393 Mbits/sec                  receiver

iperf Done.
```

2. Super Niave (Redirection from External socket -> Proxy Socket AND Proxy Socket -> Container Socket)

```
[astoycos@localhost net-ebpf-playground]$ iperf3 -4 -c 192.168.122.91 -p 8789 
Connecting to host 192.168.122.91, port 8789
[  5] local 192.168.122.1 port 45662 connected to 192.168.122.91 port 8789
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   123 MBytes  1.03 Gbits/sec    0    250 KBytes       
[  5]   1.00-2.00   sec   133 MBytes  1.12 Gbits/sec    0    250 KBytes       
[  5]   2.00-3.00   sec   126 MBytes  1.05 Gbits/sec    0    250 KBytes       
[  5]   3.00-4.00   sec   133 MBytes  1.11 Gbits/sec    0    250 KBytes       
[  5]   4.00-5.00   sec   133 MBytes  1.12 Gbits/sec    0    263 KBytes       
[  5]   5.00-6.00   sec   132 MBytes  1.11 Gbits/sec    0    277 KBytes       
[  5]   6.00-7.00   sec   130 MBytes  1.09 Gbits/sec    0    277 KBytes       
[  5]   7.00-8.00   sec   125 MBytes  1.05 Gbits/sec    0    277 KBytes       
[  5]   8.00-9.00   sec   133 MBytes  1.11 Gbits/sec    0    277 KBytes       
[  5]   9.00-10.00  sec   130 MBytes  1.09 Gbits/sec    0    277 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.27 GBytes  1.09 Gbits/sec    0             sender
[  5]   0.00-10.00  sec  1.26 GBytes  1.08 Gbits/sec                  receiver

iperf Done.
```

3. A bit smarter (proxy listening socket -> server Socket)? 

TODO (Not sure if this is worth it) 

EDIT Not worth it, stick with below flow for now :) 


DataFLOW 

Traffic enters via Ports 8789 <nodeport>

Three main sockets are created/involved

1. Local -> <nodeIP>:<NodePort> Remote ++++ <NodeGW>:<Random Client Port> [Root Net NS] (Fake bound socket)
- Recieves traffic from remote client
- Sendmsg occurs here for response (No accleration)

2. Local -> <NodeIP>:<Random Port> ++++ Remote -> <PodIP>:<Random Port**> [Root Net NS] (Client Socket) 
- Data is copied from 1 to here and then sent to 3
- Sendmsg occurs here for first send (Accleration occurs) 

3. Local -> <PodIP>:<Sever Port> ++++ Remote -> <nodeIP>:<Random Port**> [Pod Net Ns] (Destination server socket)
- Sendmsg occurs here for response (Accleration occurs)


Open Question.... for the msg forwarding can we skip 2. and forward directly on ingress path to 3 With an Sk_SKB program?