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--- vmware:traceroute [2012/11/08 18:21] – created nickaccad
+++ vmware:traceroute [2012/11/12 03:51] (current) – naccad
@@ Line 1: / Line 1: @@
+====== How to traceroute inside ESXi ======
 I found this somewhere on the internet a long time ago.
 ESX does not have a traceroute binary or utility, so someone created on in Python.
-{{:traceroute.py|}}
 If you are the owner of this script, please let me know, I would like to see the latest version if any and give you some credit here.
 -nick
+<file python traceroute.py>
+#!/usr/bin/python
+import optparse
+import socket
+import sys
+icmp = socket.getprotobyname('icmp')
+udp = socket.getprotobyname('udp')
+def create_sockets(ttl):
+    """
+    Sets up sockets necessary for the traceroute.  We need a receiving
+    socket and a sending socket.
+    """
+    recv_socket = socket.socket(socket.AF_INET, socket.SOCK_RAW, icmp)
+    send_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, udp)
+    send_socket.setsockopt(socket.SOL_IP, socket.IP_TTL, ttl)
+    return recv_socket, send_socket
+def main(dest_name, port, max_hops):
+    dest_addr = socket.gethostbyname(dest_name)
+    ttl = 1
+    while True:
+        recv_socket, send_socket = create_sockets(ttl)
+        recv_socket.bind(("", port))
+        send_socket.sendto("", (dest_name, port))
+        curr_addr = None
+        curr_name = None
+        try:
+            # socket.recvfrom() gives back (data, address), but we
+            # only care about the latter.
+            _, curr_addr = recv_socket.recvfrom(512)
+            curr_addr = curr_addr[0]  # address is given as tuple
+            try:
+                curr_name = socket.gethostbyaddr(curr_addr)[0]
+            except socket.error:
+                curr_name = curr_addr
+        except socket.error:
+            pass
+        finally:
+            send_socket.close()
+            recv_socket.close()
+        if curr_addr is not None:
+            curr_host = "%s (%s)" % (curr_name, curr_addr)
+        else:
+            curr_host = "*"
+        print "%d\t%s" % (ttl, curr_host)
+        ttl += 1
+        if curr_addr == dest_addr or ttl > max_hops:
+            break
+    return 0
+if __name__ == "__main__":
+    parser = optparse.OptionParser(usage="%prog [options] hostname")
+    parser.add_option("-p", "--port", dest="port",
+                      help="Port to use for socket connection [default: %default]",
+                      default=33434, metavar="PORT")
+    parser.add_option("-m", "--max-hops", dest="max_hops",
+                      help="Max hops before giving up [default: %default]",
+                      default=30, metavar="MAXHOPS")
+    options, args = parser.parse_args()
+    if len(args) != 1:
+        parser.error()
+    else:
+        dest_name = args[0]
+    sys.exit(main(dest_name=dest_name,
+                  port=int(options.port),
+                  max_hops=int(options.max_hops)))
+</file>