# zschema sub-schema for zgrab2's ntp module
# Registers zgrab2-ntp globally, and ntp with the main zgrab2 schema.
from zschema.leaves import *
from zschema.compounds import *
import zschema.registry

import schemas.zcrypto as zcrypto
import schemas.zgrab2 as zgrab2

ntp_short = SubRecord({
    "seconds": Unsigned16BitInteger(),
    "fraction": Unsigned16BitInteger(),
})

ntp_long = SubRecord({
    "seconds": Unsigned32BitInteger(),
    "fraction": Unsigned32BitInteger(),
})

ntp_header = SubRecord({
    "leap_indicator": Unsigned8BitInteger(),
    "version": Unsigned8BitInteger(),
    "mode": Unsigned8BitInteger(),
    "stratum": Unsigned8BitInteger(),
    "poll": Signed8BitInteger(),
    "precision": Signed8BitInteger(),
    "root_delay": ntp_short,
    "root_dispersion": ntp_short,
    "reference_id": Binary(),
    "reference_timestamp": ntp_long,
    "origin_timestamp": ntp_long,
    "receive_timestamp": ntp_long,
    "transmit_timestamp": ntp_long,
})

mode7_header = SubRecord({
    "is_response": Boolean(),
    "has_more": Boolean(),
    "version": Unsigned8BitInteger(),
    "mode": Unsigned8BitInteger(),
    "is_authenticated": Boolean(),
    "sequence_number": Unsigned8BitInteger(),
    "implementation_number": String(),
    "request_code": String(),
    "error": String(),
    "num_items": Unsigned16BitInteger(),
    "mbz": Unsigned8BitInteger(),
    "item_size": Unsigned16BitInteger(),
})

ntp_scan_response = SubRecord({
    "result": SubRecord({
        "version": Unsigned8BitInteger(),
        "time": String(),
        "time_response": ntp_header,
        "monlist_response": Binary(),
        "monlist_header": mode7_header,
    })
}, extends=zgrab2.base_scan_response)

zschema.registry.register_schema("zgrab2-ntp", ntp_scan_response)

zgrab2.register_scan_response_type("ntp", ntp_scan_response)