Output: Add json output

[darox]

This commit adds a command line flag that enables
outputting pwru events in json format.

[brb]

Thanks! And sorry for taking so long to review.

[brb]

Thanks! Could you drop the second commit (git fetch -u origin && git rebase origin/main should do the job instead).

[darox]

Thanks! Could you drop the second commit (git fetch -u origin && git rebase origin/main should do the job instead).

done

[brb]

@darox Thanks. The PR got into a funky state (it's undoing some changes in some previous PRs). Could you rebase against the latest main (git fetch -u origin && git rebase origin/main && git push --force-with-lease)?

[darox]

@darox Thanks. The PR got into a funky state (it's undoing some changes in some previous PRs). Could you rebase against the latest main (git fetch -u origin && git rebase origin/main && git push --force-with-lease)?

I'm sorry. I had a merge conflict then fixed it, which merged main into this branch. Then I reset to my commit and pushed. I now executed your command.

[brb]

@darox The CI failures look legit. With --backend=kprobe, the file content:

               SKB    CPU          PROCESS                     FUNC
               SKB    CPU          PROCESS                     FUNC
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]             ip_local_out192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]           __ip_local_out192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]             nf_hook_slow192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522] kfree_skb_reason(SKB_DROP_REASON_NETFILTER_DROP)192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]   skb_release_head_state192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]                tcp_wfree192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]         skb_release_data192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]             kfree_skbmem192.168.18.185:41624->1.0.0.1:8080(tcp)

There is no space between "kfree_skbmem" and "192.168.18.185:41624".

[darox]

@darox The CI failures look legit. With --backend=kprobe, the file content:

               SKB    CPU          PROCESS                     FUNC
               SKB    CPU          PROCESS                     FUNC
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]             ip_local_out192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]           __ip_local_out192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]             nf_hook_slow192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522] kfree_skb_reason(SKB_DROP_REASON_NETFILTER_DROP)192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]   skb_release_head_state192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]                tcp_wfree192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]         skb_release_data192.168.18.185:41624->1.0.0.1:8080(tcp)
0xffff91a34c09cae8      8 [/usr/bin/curl:230522]             kfree_skbmem192.168.18.185:41624->1.0.0.1:8080(tcp)

There is no space between "kfree_skbmem" and "192.168.18.185:41624".

I will take a look tomorrow.

[darox]

@brb all checks passed now.

[brb]

Thanks!