Implemented basic LXMF propagation support and controls

nomadnet/Conversation.py

@@ -196,9 +196,18 @@ class Conversation:
         if self.send_destination:
             dest = self.send_destination
             source = self.app.lxmf_destination
-            lxm = LXMF.LXMessage(dest, source, content, title=title, desired_method=LXMF.LXMessage.DIRECT)
+            desired_method = LXMF.LXMessage.DIRECT
+            if self.app.directory.preferred_delivery(dest.hash) == DirectoryEntry.PROPAGATED:
+                if self.app.message_router.get_outbound_propagation_node() != None:
+                    desired_method = LXMF.LXMessage.PROPAGATED
+
+            lxm = LXMF.LXMessage(dest, source, content, title=title, desired_method=desired_method)
             lxm.register_delivery_callback(self.message_notification)
             lxm.register_failed_callback(self.message_notification)
+
+            if self.app.message_router.get_outbound_propagation_node() != None:
+                lxm.try_propagation_on_fail = self.app.try_propagation_on_fail
+
             self.app.message_router.handle_outbound(lxm)
 
             message_path = Conversation.ingest(lxm, self.app, originator=True)
@@ -210,6 +219,15 @@ class Conversation:
             return False
 
     def message_notification(self, message):
+        if message.state == LXMF.LXMessage.FAILED and hasattr(message, "try_propagation_on_fail") and message.try_propagation_on_fail:
+            RNS.log("Direct delivery of "+str(message)+" failed. Retrying as propagated message.", RNS.LOG_VERBOSE)
+            message.try_propagation_on_fail = None
+            message.delivery_attempts = 0
+            del message.next_delivery_attempt
+            message.packed = None
+            message.desired_method = LXMF.LXMessage.PROPAGATED
+            self.app.message_router.handle_outbound(message)
+        else:
             message_path = Conversation.ingest(message, self.app, originator=True)
 
     def __str__(self):

nomadnet/Directory.py

@@ -17,6 +17,7 @@ class Directory:
         associated_peer = RNS.Destination.hash_from_name_and_identity("lxmf.delivery", announced_identity)
 
         app.directory.node_announce_received(destination_hash, app_data, associated_peer)
+        app.autoselect_propagation_node()
 
 
     def __init__(self, app):
@@ -31,7 +32,7 @@ class Directory:
             packed_list = []
             for source_hash in self.directory_entries:
                 e = self.directory_entries[source_hash]
-                packed_list.append((e.source_hash, e.display_name, e.trust_level, e.hosts_node))
+                packed_list.append((e.source_hash, e.display_name, e.trust_level, e.hosts_node, e.preferred_delivery))
 
             directory = {
                 "entry_list": packed_list,
@@ -59,7 +60,12 @@ class Directory:
                     else:
                         hosts_node = False
 
-                    entries[e[0]] = DirectoryEntry(e[0], e[1], e[2], hosts_node)
+                    if len(e) > 4:
+                        preferred_delivery = e[4]
+                    else:
+                        preferred_delivery = None
+
+                    entries[e[0]] = DirectoryEntry(e[0], e[1], e[2], hosts_node, preferred_delivery=preferred_delivery)
 
                 self.directory_entries = entries
 
@@ -130,6 +136,12 @@ class Directory:
         else:
             return DirectoryEntry.UNKNOWN
 
+    def preferred_delivery(self, source_hash):
+        if source_hash in self.directory_entries:
+            return self.directory_entries[source_hash].preferred_delivery
+        else:
+            return DirectoryEntry.DIRECT
+
     def remember(self, entry):
         self.directory_entries[entry.source_hash] = entry
 
@@ -189,13 +201,21 @@ class DirectoryEntry:
     UNKNOWN   = 0x02
     TRUSTED   = 0xFF
 
-    def __init__(self, source_hash, display_name=None, trust_level=UNKNOWN, hosts_node=False):
+    DIRECT     = 0x01
+    PROPAGATED = 0x02
+
+    def __init__(self, source_hash, display_name=None, trust_level=UNKNOWN, hosts_node=False, preferred_delivery=None):
         if len(source_hash) == RNS.Identity.TRUNCATED_HASHLENGTH//8:
             self.source_hash  = source_hash
             self.display_name = display_name
             if display_name  == None:
                 display_name  = source_hash
 
+            if preferred_delivery == None:
+                self.preferred_delivery = DirectoryEntry.DIRECT
+            else:
+                self.preferred_delivery = preferred_delivery
+
             self.trust_level  = trust_level
             self.hosts_node   = hosts_node
         else:

nomadnet/NomadNetworkApp.py

@@ -6,6 +6,8 @@ import RNS
 import LXMF
 import nomadnet
 
+from nomadnet.Directory import DirectoryEntry
+
 import RNS.vendor.umsgpack as msgpack
 
 from ._version import __version__
@@ -60,6 +62,7 @@ class NomadNetworkApp:
         self.firstrun          = False
 
         self.peer_announce_at_start  = True
+        self.try_propagation_on_fail = True
 
         if not os.path.isdir(self.storagepath):
             os.makedirs(self.storagepath)
@@ -154,9 +157,9 @@ class NomadNetworkApp:
                 nomadnet.panic()
 
 
-        atexit.register(self.exit_handler)
+        self.directory = nomadnet.Directory(self)
 
-        self.message_router = LXMF.LXMRouter()
+        self.message_router = LXMF.LXMRouter(identity = self.identity, autopeer = True)
         self.message_router.register_delivery_callback(self.lxmf_delivery)
 
         self.lxmf_destination = self.message_router.register_delivery_identity(self.identity, display_name=self.peer_settings["display_name"])
@@ -171,9 +174,9 @@ class NomadNetworkApp:
 
         RNS.log("LXMF Router ready to receive on: "+RNS.prettyhexrep(self.lxmf_destination.hash))
 
-        self.directory = nomadnet.Directory(self)
-
         if self.enable_node:
+            self.message_router.enable_propagation(self.storagepath)
+            RNS.log("LXMF Propagation Node started on: "+RNS.prettyhexrep(self.message_router.propagation_destination.hash))
             self.node = nomadnet.Node(self)
         else:
             self.node = None
@@ -181,9 +184,13 @@ class NomadNetworkApp:
         RNS.Transport.register_announce_handler(nomadnet.Conversation)
         RNS.Transport.register_announce_handler(nomadnet.Directory)
 
+        self.autoselect_propagation_node()
+
         if self.peer_announce_at_start:
             self.announce_now()
 
+        atexit.register(self.exit_handler)
+
         nomadnet.ui.spawn(self.uimode)
 
     def set_display_name(self, display_name):
@@ -202,6 +209,30 @@ class NomadNetworkApp:
         self.peer_settings["last_announce"] = time.time()
         self.save_peer_settings()
 
+    def autoselect_propagation_node(self):
+        nodes = self.directory.known_nodes()
+        trusted_nodes = []
+
+        selected_node = None
+        best_hops = RNS.Transport.PATHFINDER_M+1
+
+        for node in nodes:
+            if node.trust_level == DirectoryEntry.TRUSTED:
+                hops = RNS.Transport.hops_to(node.source_hash)
+
+                if hops < best_hops:
+                    best_hops = hops
+                    selected_node = node
+
+        if selected_node == None:
+            RNS.log("Could not autoselect a prepagation node! LXMF propagation will not be available until a trusted node announces on the network.", RNS.LOG_WARNING)
+        else:
+            node_identity = RNS.Identity.recall(selected_node.source_hash)
+            propagation_hash = RNS.Destination.hash_from_name_and_identity("lxmf.propagation", node_identity)
+            RNS.log("Selecting "+selected_node.display_name+" "+RNS.prettyhexrep(propagation_hash)+" as default LXMF propagation node", RNS.LOG_INFO)
+            self.message_router.set_outbound_propagation_node(propagation_hash)
+                
+
     def save_peer_settings(self):
         file = open(self.peersettingspath, "wb")
         file.write(msgpack.packb(self.peer_settings))
@@ -286,6 +317,10 @@ class NomadNetworkApp:
                     value = self.config["client"].as_bool(option)
                     self.peer_announce_at_start = value
 
+                if option == "try_propagation_on_send_fail":
+                    value = self.config["client"].as_bool(option)
+                    self.try_propagation_on_fail = value
+
                 if option == "user_interface":
                     value = value.lower()
                     if value == "none":
@@ -430,6 +465,12 @@ downloads_path = ~/Downloads
 # to let other peers reach it immediately.
 announce_at_start = yes
 
+# By default, the client will try to deliver a
+# message via the LXMF propagation network, if
+# a direct delivery to the recipient is not
+# possible.
+try_propagation_on_send_fail = yes
+
 [textui]
 
 # Amount of time to show intro screen

nomadnet/_version.py

@@ -1 +1 @@
-__version__ = "0.1.1"
+__version__ = "0.1.2"

nomadnet/ui/TextUI.py

@@ -120,6 +120,7 @@ GLYPHS = {
     ("decoration_menu", " +",        " +",          " \uf93a"),
     ("unread_menu",     " !",        " \u2709",     urm_char),
     ("globe",           "",          "",            "\uf484"),
+    ("sent",            "/\\",       "\u2191",      "\ufbf4")
 }
 
 class TextUI:

nomadnet/ui/textui/Conversations.py

@@ -144,6 +144,9 @@ class ConversationsDisplay():
         unknown_selected    = True
         trusted_selected    = False
 
+        direct_selected     = True
+        propagated_selected = False
+
         try:
             if self.app.directory.find(bytes.fromhex(source_hash_text)):
                 trust_level = self.app.directory.trust_level(bytes.fromhex(source_hash_text))
@@ -159,6 +162,11 @@ class ConversationsDisplay():
                     untrusted_selected = False
                     unknown_selected   = False
                     trusted_selected   = True
+
+                if self.app.directory.preferred_delivery(bytes.fromhex(source_hash_text)) == DirectoryEntry.PROPAGATED:
+                    direct_selected = False
+                    propagated_selected = True
+                    
         except Exception as e:
             pass
 
@@ -167,6 +175,10 @@ class ConversationsDisplay():
         r_unknown   = urwid.RadioButton(trust_button_group, "Unknown", state=unknown_selected)
         r_trusted   = urwid.RadioButton(trust_button_group, "Trusted", state=trusted_selected)
 
+        method_button_group = []
+        r_direct     = urwid.RadioButton(method_button_group, "Deliver directly", state=direct_selected)
+        r_propagated = urwid.RadioButton(method_button_group, "Use propagation nodes", state=propagated_selected)
+
         def dismiss_dialog(sender):
             self.update_conversation_list()
             self.dialog_open = False
@@ -181,7 +193,11 @@ class ConversationsDisplay():
                 elif r_trusted.state == True:
                     trust_level = DirectoryEntry.TRUSTED
 
-                entry = DirectoryEntry(source_hash, display_name, trust_level)
+                delivery = DirectoryEntry.DIRECT
+                if r_propagated.state == True:
+                    delivery = DirectoryEntry.PROPAGATED
+
+                entry = DirectoryEntry(source_hash, display_name, trust_level, preferred_delivery=delivery)
                 self.app.directory.remember(entry)
                 self.update_conversation_list()
                 self.dialog_open = False
@@ -216,6 +232,9 @@ class ConversationsDisplay():
             r_untrusted,
             r_unknown,
             r_trusted,
+            urwid.Divider(g["divider1"]),
+            r_direct,
+            r_propagated,
             known_section,
             urwid.Columns([("weight", 0.45, urwid.Button("Save", on_press=confirmed)), ("weight", 0.1, urwid.Text("")), ("weight", 0.45, urwid.Button("Back", on_press=dismiss_dialog))])
         ])
@@ -718,6 +737,9 @@ class LXMessageWidget(urwid.WidgetWrap):
             elif message.lxm.state == LXMF.LXMessage.FAILED:
                 header_style = "msg_header_failed"
                 title_string = g["cross"]+" "+title_string
+            elif message.lxm.state == LXMF.LXMessage.SENT:
+                header_style = "msg_header_sent"
+                title_string = g["sent"]+" "+title_string
             else:
                 header_style = "msg_header_sent"
                 title_string = g["arrow_r"]+" "+title_string

nomadnet/vendor/quotes.py

@@ -1,5 +1,6 @@
 quotes = [
     ("I want the wisdom that wise men revere. I want more.", "Faithless"),
     ("That's enough entropy for you my friend", "Unknown"),
-    ("Any time two people connect online, it's financed by a third person who believes they can manipulate the first two", "Jaron Lanier")
+    ("Any time two people connect online, it's financed by a third person who believes they can manipulate the first two", "Jaron Lanier"),
+    ("The landscape of the future is set, but how one will march across it is not determined", "Terence McKenna")
 ]

setup.py

@@ -23,6 +23,6 @@ setuptools.setup(
     entry_points= {
         'console_scripts': ['nomadnet=nomadnet.nomadnet:main']
     },
-    install_requires=['rns>=0.2.6', 'lxmf>=0.0.9', 'urwid>=2.1.2'],
+    install_requires=['rns>=0.2.7', 'lxmf>=0.1.0', 'urwid>=2.1.2'],
     python_requires='>=3.6',
 )