X-Git-Url: http://average.org/gitweb/?a=blobdiff_plain;f=gps303%2Fzmsg.py;h=0457685ab05ab6bf6cade6eb466c9ccce3a48946;hb=2cc29ee67b6432e1cd74a21b3c9181b8b5b557f9;hp=cdd23fcd5eb7e1d36d02d0c5527ff3f7bc4d4074;hpb=513eaed4a832748bd77294679939627eaaf69612;p=loctrkd.git

diff --git a/gps303/zmsg.py b/gps303/zmsg.py
index cdd23fc..0457685 100644
--- a/gps303/zmsg.py
+++ b/gps303/zmsg.py
@@ -3,22 +3,30 @@
 import ipaddress as ip
 from struct import pack, unpack
 
-__all__ = "Bcast", "Resp"
+__all__ = "Bcast", "Resp", "topic"
+
 
 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)
+    try:
+        if peeraddr is None:
+            saddr = "::"
+            port = 0
+        else:
+            saddr, port, _x, _y = peeraddr
+        addr = ip.ip_address(saddr)
+    except ValueError:
+        saddr, port = peeraddr
+        a4 = ip.ip_address(saddr)
+        addr = ip.IPv6Address(b"\0\0\0\0\0\0\0\0\0\0\xff\xff" + a4.packed)
+    return addr.packed + 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]
+    a6 = ip.IPv6Address(buffer[:16])
+    port = unpack("!H", buffer[16:])[0]
+    addr = a6.ipv4_mapped
+    if addr is None:
+        addr = a6
     return (addr, port)
 
 
@@ -38,22 +46,50 @@ class _Zmsg:
                 + str(kwargs)
             )
 
+    def __repr__(self):
+        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):
+        return all(
+            [getattr(self, k) == getattr(other, k) for k, _ in self.KWARGS]
+        )
+
     def decode(self, buffer):
-        raise RuntimeError(
-            self.__class__.__name__ + "must implement `encode()` method"
+        raise NotImplementedError(
+            self.__class__.__name__ + "must implement `decode()` method"
         )
 
     @property
     def packed(self):
-        raise RuntimeError(
-            self.__class__.__name__ + "must implement `encode()` method"
+        raise NotImplementedError(
+            self.__class__.__name__ + "must implement `packed()` property"
         )
 
 
+def topic(proto, is_incoming=True, imei=None):
+    return (
+        pack("BB", is_incoming, proto) + b"" if imei is None else imei.encode()
+    )
+
+
 class Bcast(_Zmsg):
     """Zmq message to broadcast what was received from the terminal"""
 
     KWARGS = (
+        ("is_incoming", True),
         ("proto", 256),
         ("imei", None),
         ("when", None),
@@ -64,34 +100,46 @@ class Bcast(_Zmsg):
     @property
     def packed(self):
         return (
-            pack("B", self.proto)
+            pack("BB", int(self.is_incoming), 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))
+            + (
+                b"\0\0\0\0\0\0\0\0"
+                if self.when is None
+                else pack("!d", self.when)
+            )
             + pack_peer(self.peeraddr)
             + self.packet
         )
 
     def decode(self, buffer):
-        self.proto = buffer[0]
-        self.imei = buffer[1:17].decode()
+        self.is_incoming = bool(buffer[0])
+        self.proto = buffer[1]
+        self.imei = buffer[2:18].decode()
         if self.imei == "0000000000000000":
             self.imei = None
-        self.when = unpack("!d", buffer[17:25])[0]
-        self.peeraddr = unpack_peer(buffer[25:44])
+        self.when = unpack("!d", buffer[18:26])[0]
+        self.peeraddr = unpack_peer(buffer[26:44])
         self.packet = buffer[44:]
 
 
 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):
         return (
-            "0000000000000000" if self.imei is None else self.imei.encode()
-        ) + self.packet
+            ("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)
+            )
+            + self.packet
+        )
 
     def decode(self, buffer):
         self.imei = buffer[:16].decode()
-        self.packet = buffer[16:]
+        self.when = unpack("!d", buffer[16:24])[0]
+        self.packet = buffer[24:]