QUIC: ngx_quic_bpf module. The quic kernel bpf helper inspects packet payload for DCID, extracts key and routes the packet into socket matching the key. Due to reuseport feature, each worker owns a personal socket, which is identified by the same key, used to create DCID. BPF objects are locked in RAM and are subject to RLIMIT_MEMLOCK. The "ulimit -l" command may be used to setup proper limits, if maps cannot be created with EPERM or updated with ETOOLONG.

--- a/src/event/quic/ngx_event_quic_transport.h
+++ b/src/event/quic/ngx_event_quic_transport.h
@@ -353,4 +353,6 @@ ngx_int_t ngx_quic_parse_transport_param
 ssize_t ngx_quic_create_transport_params(u_char *p, u_char *end,
     ngx_quic_tp_t *tp, size_t *clen);
 
+void ngx_quic_dcid_encode_key(u_char *dcid, uint64_t key);
+
 #endif /* _NGX_EVENT_QUIC_WIRE_H_INCLUDED_ */