howto count RX/TX bytes

[Ya]

i've made irssi script that runs:

[Janne Pikkarainen]

At least if you have some iptables rules around, iptables -vL shows you something like

---
Chain INPUT (policy ACCEPT 9329M packets, 1734G bytes)
Chain OUTPUT (policy ACCEPT 13G packets, 14T bytes)
---

Just parse it from there. Maybe there's a less verbose way to ask that data from iptables, but I've never needed that.
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