Daemon provides steps on how to change the port.

Daemon now points to a faq on how to change the port if it can't
connect to 3333(default) and adds support for the required api/cli call.

Fixex #710

CHANGELOG.md

@@ -32,6 +32,7 @@ at anytime.
   * Fix default directories to comply to XDG
   * Fixed BlobManager causing functional tests to fail, removed its unneeded manage() loop
   * Increased max_key_fee
+  * Gives message and instructions if port 3333 is used
 
 ### Deprecated
   *

docs/cli.md

@@ -752,6 +752,7 @@ Args:
     'data_rate': (float) data rate,
     'max_key_fee': (float) maximum key fee,
     'download_directory': (str) path of where files are downloaded,
+    'peer_port': (int) port through which daemon should connect,
     'max_upload': (float), currently not supported
     'max_download': (float), currently not supported
     'download_timeout': (int) download timeout in seconds

docs/index.md

@@ -604,6 +604,7 @@ Args:
     'data_rate': (float) data rate,
     'max_key_fee': (float) maximum key fee,
     'download_directory': (str) path of where files are downloaded,
+    'peer_port': (int) port through which daemon should connect,
     'max_upload': (float), currently not supported
     'max_download': (float), currently not supported
     'download_timeout': (int) download timeout in seconds

lbrynet/daemon/Daemon.py

@@ -309,10 +309,12 @@ class Daemon(AuthJSONRPCServer):
                                                    self.session.peer_manager)
 
             try:
+                log.info("Daemon bound to port: %d", self.peer_port)
                 self.lbry_server_port = reactor.listenTCP(self.peer_port, server_factory)
             except error.CannotListenError as e:
                 import traceback
-                log.error("Couldn't bind to port %d. %s", self.peer_port, traceback.format_exc())
+                log.error("Couldn't bind to port %d. Visit lbry.io/faq/how-to-change-port for more details.", self.peer_port)
+                log.error("%s", traceback.format_exc())
                 raise ValueError("%s lbrynet may already be running on your computer.", str(e))
         return defer.succeed(True)
 
@@ -418,6 +420,7 @@ class Daemon(AuthJSONRPCServer):
             'download_directory': str,
             'data_rate': float,
             'download_timeout': int,
+            'peer_port': int,
             'max_key_fee': dict,
             'use_upnp': bool,
             'run_reflector_server': bool,
@@ -1122,6 +1125,7 @@ class Daemon(AuthJSONRPCServer):
             settings_set [<download_directory> | --download_directory=<download_directory>]
                          [<data_rate> | --data_rate=<data_rate>]
                          [<download_timeout> | --download_timeout=<download_timeout>]
+                         [<peer_port> | --peer_port=<peer_port>]
                          [<max_key_fee> | --max_key_fee=<max_key_fee>]
                          [<use_upnp> | --use_upnp=<use_upnp>]
                          [<run_reflector_server> | --run_reflector_server=<run_reflector_server>]
@@ -1135,6 +1139,7 @@ class Daemon(AuthJSONRPCServer):
             <download_directory>, --download_directory=<download_directory>  : (str)
             <data_rate>, --data_rate=<data_rate>                             : (float), 0.0001
             <download_timeout>, --download_timeout=<download_timeout>        : (int), 180
+            <peer_port>, --peer_port=<peer_port>                             : (int), 3333
             <max_key_fee>, --max_key_fee=<max_key_fee>   : (dict) maximum key fee for downloads,
                                                             in the format: {
                                                                 "currency": <currency_symbol>,