Output iface name when --output-meta is set #259
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This is going to be used for listing links (ifaces). NB: we cannot use Go's net.Interface due to [1]. [1]: cilium/cilium#15051 Signed-off-by: Martynas Pumputis <m@lambda.lt>
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This commits makes --output-meta to output not only ifindex, but also
iface name.
To achieve that, we first build a netns_inode => ifindex => iface_name
cache. This is done by entering each /proc/$PID/ns/net, and then quering
ifaces. Then, when a pwru process receives an BPF event, it queries the
cache (netns inode and ifindex are set in the event).
Example:
... [curl] nf_hook_slow netns=4026531840 mark=0x0 iface=3(wlan0)
Signed-off-by: Martynas Pumputis <m@lambda.lt>
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This commits makes --output-meta to output not only ifindex, but also
iface name.
To achieve that, we first build a netns_inode => ifindex => iface_name
cache. This is done by entering each /proc/$PID/ns/net, and then quering
ifaces. Then, when a pwru process receives an BPF event, it queries the
cache (netns inode and ifindex are set in the event).
Example: