importer: Drop method to import routing information from route servers

telnetlib in Python is deprecated and will be removed in Python 3.13.
Since we don't use this feature any more, this patch removes it
entirely.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/scripts/location-importer.in b/src/scripts/location-importer.in
index d8f9cbfb5e286ebca56d81536bca2d3d66974a68..547ff610ec56622cf64742c72119b81e0eaa4d1e 100644 (file)
--- a/src/scripts/location-importer.in
+++ b/src/scripts/location-importer.in
@@ -26,7 +26,6 @@ import math
 import re
 import socket
 import sys
-import telnetlib
 import urllib.error
 
 # Load our location module
@@ -1068,8 +1067,6 @@ class CLI(object):
                with self.db.transaction():
                        if server.startswith("/"):
                                self._handle_update_announcements_from_bird(server)
-                       else:
-                               self._handle_update_announcements_from_telnet(server)
 
                        # Purge anything we never want here
                        self.db.execute("""
@@ -1198,72 +1195,6 @@ class CLI(object):
                                        # We don't need to process any more
                                        break
 
-       def _handle_update_announcements_from_telnet(self, server):
-               # Pre-compile regular expression for routes
-               route = re.compile(b"^\*[\s\>]i([^\s]+).+?(\d+)\si\r\n", re.MULTILINE|re.DOTALL)
-
-               with telnetlib.Telnet(server) as t:
-                       # Enable debug mode
-                       #if ns.debug:
-                       #       t.set_debuglevel(10)
-
-                       # Wait for console greeting
-                       greeting = t.read_until(b"> ", timeout=30)
-                       if not greeting:
-                               log.error("Could not get a console prompt")
-                               return 1
-
-                       # Disable pagination
-                       t.write(b"terminal length 0\n")
-
-                       # Wait for the prompt to return
-                       t.read_until(b"> ")
-
-                       # Fetch the routing tables
-                       for protocol in ("ipv6", "ipv4"):
-                               log.info("Requesting %s routing table" % protocol)
-
-                               # Request the full unicast routing table
-                               t.write(b"show bgp %s unicast\n" % protocol.encode())
-
-                               # Read entire header which ends with "Path"
-                               t.read_until(b"Path\r\n")
-
-                               while True:
-                                       # Try reading a full entry
-                                       # Those might be broken across multiple lines but ends with i
-                                       line = t.read_until(b"i\r\n", timeout=5)
-                                       if not line:
-                                               break
-
-                                       # Show line for debugging
-                                       #log.debug(repr(line))
-
-                                       # Try finding a route in here
-                                       m = route.match(line)
-                                       if m:
-                                               network, autnum = m.groups()
-
-                                               # Convert network to string
-                                               network = network.decode()
-
-                                               # Append /24 for IPv4 addresses
-                                               if not "/" in network and not ":" in network:
-                                                       network = "%s/24" % network
-
-                                               # Convert AS number to integer
-                                               autnum = int(autnum)
-
-                                               log.info("Found announcement for %s by %s" % (network, autnum))
-
-                                               self.db.execute("INSERT INTO announcements(network, autnum) \
-                                                       VALUES(%s, %s) ON CONFLICT (network) DO \
-                                                       UPDATE SET autnum = excluded.autnum, last_seen_at = CURRENT_TIMESTAMP",
-                                                       network, autnum,
-                                               )
-
-                               log.info("Finished reading the %s routing table" % protocol)
-
        def _bird_cmd(self, socket_path, command):
                # Connect to the socket
                s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)