From ca61670887396c8c7623db115cc87d39b5657a77 Mon Sep 17 00:00:00 2001
From: yakamok <38737288+yakamok@users.noreply.github.com>
Date: Sun, 16 Dec 2018 23:28:18 +0100
Subject: [PATCH] Create crawler.py

---
 api/crawler.py | 127 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 api/crawler.py

diff --git a/api/crawler.py b/api/crawler.py
new file mode 100644
index 0000000..8ccdc3f
--- /dev/null
+++ b/api/crawler.py
@@ -0,0 +1,127 @@
+#some of this code was contributed by Arcelier
+#original code https://github.com/Arceliar/yggdrasil-map/blob/master/scripts/crawl-dht.py
+
+import psycopg2
+import json
+import socket
+import sys
+import time
+import ipaddress
+
+visited = dict() # Add nodes after a successful lookup response
+rumored = dict() # Add rumors about nodes to ping
+timedout = dict()
+
+host_port = ('localhost', 9001)
+
+DB_PASSWORD = "password"
+DB_USER = "yggindex"
+DB_NAME = "yggindex"
+DB_HOST = "localhost"
+
+def recv_until_done(soc):
+    all_data = []
+    while True:
+        incoming_data = soc.recv(8192)
+        if not incoming_data:
+            soc.close()
+            break
+        all_data.append(incoming_data)
+    return ''.join(all_data)
+
+
+def getDHTPingRequest(key, coords, target=None):
+    if target:
+        return '{{"request":"dhtPing", "box_pub_key":"{}", "coords":"{}", "target":"{}"}}'.format(key, coords, target)
+    else:
+        return '{{"request":"dhtPing", "box_pub_key":"{}", "coords":"{}"}}'.format(key, coords)
+
+
+def doRequest(req):
+    try:
+        ygg = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        ygg.connect(host_port)
+        ygg.send(req)
+        data = json.loads(recv_until_done(ygg))
+        return data
+    except:
+        return None
+
+
+def check_coords(coords):
+    coord_len = coords.replace(' ', '').replace('[', '').replace(']', '')
+    digits_found = [x for x in coord_len if x.isdigit()]
+
+    if len(digits_found) == len(coord_len):
+        crus = True
+    else:
+        crus = False
+    return crus
+
+
+def valid_ipv6_check(ipv6add):
+    try:
+        if ipaddress.IPv6Address(unicode(ipv6add)):
+            addr = True
+    except:
+        addr = False
+    return addr
+
+
+def insert_new_entry(ipv6, coords):
+    try:
+        dbconn = psycopg2.connect(host=DB_HOST,database=DB_NAME, user=DB_USER, password=DB_PASSWORD)
+        cur = dbconn.cursor()
+
+        cur.execute('''INSERT INTO yggindex(ipv6, coords, unixtstamp)\
+                        VALUES(''' + "'" + ipv6 + "'," + "'" + coords + "'," + str(int(time.time())) + ''')\
+                        ON CONFLICT (ipv6) DO UPDATE\
+                        SET unixtstamp = ''' + "'" + str(int(time.time())) + "'," +''' \
+                        coords = ''' + "'" + coords + "'" + ''';''')
+
+        dbconn.commit()
+        cur.close()
+        dbconn.close()
+    except:
+        print "database error inserting"
+
+def handleResponse(address, info, data):
+    global visited
+    global rumored
+    global timedout
+
+    timedout[str(address)] = {'box_pub_key':str(info['box_pub_key']), 'coords':str(info['coords'])}
+
+    if not data:
+        return
+    if 'response' not in data:
+        return
+    if 'nodes' not in data['response']:
+        return
+    for addr,rumor in data['response']['nodes'].iteritems():
+        if addr in visited: continue
+        rumored[addr] = rumor
+    if address not in visited:
+        visited[str(address)] = info['coords']
+    if address in timedout: 
+        del timedout[address]
+
+
+# Get self info
+selfInfo = doRequest('{"request":"getSelf"}')
+
+# Initialize dicts of visited/rumored nodes
+for k,v in selfInfo['response']['self'].iteritems():
+    rumored[k] = v
+
+# Loop over rumored nodes and ping them, adding to visited if they respond
+while len(rumored) > 0:
+    for k,v in rumored.iteritems():
+        handleResponse(k, v, doRequest(getDHTPingRequest(v['box_pub_key'], v['coords'])))
+        break 
+    del rumored[k]
+#End
+
+for x, y in visited.iteritems():
+    if valid_ipv6_check(x) and check_coords(y):
+        insert_new_entry(x, y)