fd may block if add to file, set as non block then close.

get home dir.

get start time from /proc/pid/stat.

get origin destination addr.

make sure dir exist.

marshal json.

marshal data, now only useful for udp.

use to mega add elem to slice and map result add err.

use to mega del elem from slice and map result del err.

mega dial try to transparent connect, privilege should be needed.

check if target exist in slice.

mega insert elem to slice.

parse cgroup v2 message from /proc/pid/cgroup.

parse.

ParseRemoteAddrFromMsgHdr parse origin remote addr msg from msg_hdr.

run script.

set conn opt transparent.

set socket transparent.

unmarshal data.

from linux/include/uapi/linux/netfilter_ipv6/ip6_tables.h.

addr type for udp and tcp.