wengzhe opened a new pull request, #2356:
URL: https://github.com/apache/nuttx-apps/pull/2356
## Summary
A simple tool like Linux's `conntrack` command, only supports printing NAT
connections now.
```
nuttx> conntrack -E
[NEW] icmp src=192.168.21.66 dst=1.2.3.4 type=8 code=0 id=26739
src=1.2.3.4 dst=192.168.11.1 type=0 code=0 id=26739
[NEW] tcp src=192.168.21.66 dst=1.2.3.4 sport=38446 dport=80
src=1.2.3.4 dst=192.168.11.1 sport=80 dport=38446
[DESTROY] icmp src=192.168.21.66 dst=1.2.3.4 type=8 code=0 id=26739
src=1.2.3.4 dst=192.168.11.1 type=0 code=0 id=26739
```
```
nuttx> conntrack -L
tcp src=192.168.21.66 dst=1.2.3.4 sport=38446 dport=80 src=1.2.3.4
dst=192.168.11.1 sport=80 dport=38446
icmp src=192.168.21.66 dst=1.2.3.4 type=8 code=0 id=26739 src=1.2.3.4
dst=192.168.11.1 type=0 code=0 id=26739
conntrack: 2 flow entries have been shown.
```
## Impact
Our own implementation behaves like Linux's `conntrack` command
## Testing
Together with https://github.com/apache/nuttx/pull/12156
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