pushClientTraffics decoded the pushed list whole, and each "{}" became a
full traffic row, so a body under the size cap could cost the panel
close to a gigabyte. The list is now decoded entry by entry and refused
past 262144 entries. The capped decoder the node runtime already used
moves to json_util so both share it.
Node responses are untrusted input on the master, and a few shapes still
cost it without bound under the 64 MiB body cap:
- a success=false message became an error (logged, stored as lastError)
in full; it is now cut to the 8 KiB the non-200 diagnostic already uses;
- each "{}" of a reported list decodes into a whole struct, so lists are
now decoded entry by entry with per-endpoint caps (1024 descendants,
65536 inbounds and host groups, 1M client-IP rows), and the GUID-keyed
trees and maps are capped at 1M values;
- a TLS handshake the node never answers kept a socket and goroutines
alive forever, since the transport keeps dialing for its pool after the
request gives up; node transports now give up after 10 s.
MHSanaei