import ipaddress as ip
from struct import pack, unpack
-
-__all__ = "Bcast", "Resp"
-
-def pack_peer(peeraddr):
- saddr, port = peeraddr
- addr = ip.ip_address(saddr)
- return pack("B", addr.version) + (addr.packed + b"\0\0\0\0\0\0\0\0\0\0\0\0")[:16] + pack("!H", port)
-
-def unpack_peer(buffer):
- version = buffer[0]
- if version not in (4, 6):
- return None
- if version == 4:
- addr = ip.IPv4Address(buffer[1:5])
- else:
- addr = ip.IPv6Address(buffer[1:17])
- port = unpack("!H", buffer[17:19])[0]
- return (addr, port)
+from typing import Any, cast, Optional, Tuple, Type, Union
+
+__all__ = "Bcast", "Resp", "topic"
+
+
+def pack_peer( # 18 bytes
+ peeraddr: Union[None, Tuple[str, int], Tuple[str, int, Any, Any]]
+) -> bytes:
+ if peeraddr is None:
+ addr: Union[ip.IPv4Address, ip.IPv6Address] = ip.IPv6Address(0)
+ port = 0
+ elif len(peeraddr) == 2:
+ peeraddr = cast(Tuple[str, int], peeraddr)
+ saddr, port = peeraddr
+ addr = ip.ip_address(saddr)
+ elif len(peeraddr) == 4:
+ peeraddr = cast(Tuple[str, int, Any, Any], peeraddr)
+ saddr, port, _x, _y = peeraddr
+ addr = ip.ip_address(saddr)
+ if isinstance(addr, ip.IPv4Address):
+ addr = ip.IPv6Address(b"\0\0\0\0\0\0\0\0\0\0\xff\xff" + addr.packed)
+ return addr.packed + pack("!H", port)
+
+
+def unpack_peer(
+ buffer: bytes,
+) -> Tuple[str, int]:
+ a6 = ip.IPv6Address(buffer[:16])
+ port = unpack("!H", buffer[16:])[0]
+ a4 = a6.ipv4_mapped
+ if a4 is not None:
+ return (str(a4), port)
+ elif a6 == ip.IPv6Address("::"):
+ return ("", 0)
+ return (str(a6), port)
class _Zmsg:
- def __init__(self, *args, **kwargs):
+ KWARGS: Tuple[Tuple[str, Any], ...]
+
+ def __init__(self, *args: Any, **kwargs: Any) -> None:
if len(args) == 1:
self.decode(args[0])
elif bool(kwargs):
+ str(kwargs)
)
- def decode(self, buffer):
- raise RuntimeError(
- self.__class__.__name__ + "must implement `encode()` method"
+ def __repr__(self) -> str:
+ return "{}({})".format(
+ self.__class__.__name__,
+ ", ".join(
+ [
+ "{}={}".format(
+ k,
+ 'bytes.fromhex("{}")'.format(getattr(self, k).hex())
+ if isinstance(getattr(self, k), bytes)
+ else getattr(self, k),
+ )
+ for k, _ in self.KWARGS
+ ]
+ ),
+ )
+
+ def __eq__(self, other: object) -> bool:
+ if isinstance(other, self.__class__):
+ return all(
+ [getattr(self, k) == getattr(other, k) for k, _ in self.KWARGS]
+ )
+ return NotImplemented
+
+ def decode(self, buffer: bytes) -> None:
+ raise NotImplementedError(
+ self.__class__.__name__ + "must implement `decode()` method"
)
@property
- def packed(self):
- raise RuntimeError(
- self.__class__.__name__ + "must implement `encode()` method"
+ def packed(self) -> bytes:
+ raise NotImplementedError(
+ self.__class__.__name__ + "must implement `packed()` property"
)
+def topic(
+ proto: str, is_incoming: bool = True, imei: Optional[str] = None
+) -> bytes:
+ return pack("B16s", is_incoming, proto.encode()) + (
+ b"" if imei is None else pack("16s", imei.encode())
+ )
+
+
class Bcast(_Zmsg):
"""Zmq message to broadcast what was received from the terminal"""
KWARGS = (
- ("proto", 256),
+ ("is_incoming", True),
+ ("proto", "UNKNOWN"),
("imei", None),
("when", None),
("peeraddr", None),
)
@property
- def packed(self):
+ def packed(self) -> bytes:
return (
- pack("B", self.proto)
- + ("0000000000000000" if self.imei is None else self.imei).encode()
- + (b"\0\0\0\0\0\0\0\0" if self.when is None else pack("!d", self.when))
+ pack(
+ "!B16s16sd",
+ int(self.is_incoming),
+ self.proto[:16].ljust(16, "\0").encode(),
+ b"0000000000000000"
+ if self.imei is None
+ else self.imei.encode(),
+ 0 if self.when is None else self.when,
+ )
+ pack_peer(self.peeraddr)
+ self.packet
)
- def decode(self, buffer):
- self.proto = buffer[0]
- self.imei = buffer[1:17].decode()
- if self.imei == "0000000000000000":
- self.imei = None
- self.when = unpack("!d", buffer[17:25])[0]
- self.peeraddr = unpack_peer(buffer[25:44])
- self.packet = buffer[44:]
+ def decode(self, buffer: bytes) -> None:
+ is_incoming, proto, imei, when = unpack("!B16s16sd", buffer[:41])
+ self.is_incoming = bool(is_incoming)
+ self.proto = proto.decode()
+ self.imei = (
+ None if imei == b"0000000000000000" else imei.decode().strip("\0")
+ )
+ self.when = when
+ self.peeraddr = unpack_peer(buffer[41:59])
+ self.packet = buffer[59:]
class Resp(_Zmsg):
"""Zmq message received from a third party to send to the terminal"""
- KWARGS = (("imei", None), ("packet", b""))
+ KWARGS = (("imei", None), ("when", None), ("packet", b""))
@property
- def packed(self):
+ def packed(self) -> bytes:
return (
- "0000000000000000" if self.imei is None else self.imei.encode()
- ) + self.packet
+ pack(
+ "!16sd",
+ "0000000000000000"
+ if self.imei is None
+ else self.imei.encode(),
+ 0 if self.when is None else self.when,
+ )
+ + self.packet
+ )
+
+ def decode(self, buffer: bytes) -> None:
+ imei, when = unpack("!16sd", buffer[:24])
+ self.imei = (
+ None if imei == b"0000000000000000" else imei.decode().strip("\0")
+ )
- def decode(self, buffer):
- self.imei = buffer[:16].decode()
- self.packet = buffer[16:]
+ self.when = when
+ self.packet = buffer[24:]
projects / loctrkd.git / blobdiff