Basic dispatching.

run.py

@@ -2,9 +2,45 @@
 
 import sys, logging
 import tftpy
+import re
+import cStringIO
+import time
+
+file_hooks = {}
+def hook_dispatcher(path):
+    for pattern, hook in file_hooks.iteritems():
+        match = re.match(pattern, path)
+        if match:
+            return hook(path, match)
+    return None
+
+def hook(pattern):
+    def decorator(f):
+        file_hooks[pattern] = f
+        return f
+    return decorator
+
+@hook(r"^pxelinux.cfg/default$")
+def pxelinux_default(path, match):
+    s = """default menu.c32
+    prompt 0
+
+    menu title "Khepri Boot Menu generated at %s"
+    menu INCLUDE pxelinux.cfg/graphics.conf
+    MENU AUTOBOOT Starting Xen Node in # seconds
+
+    label xen
+        menu label ^Xen Node
+        menu default
+        timeout 80
+        kernel xen/vmlinuz
+        append rootfstype=nfs root=/dev/nfs nfsroot=10.8.1.1:/var/khepri/nfs/xen,v4,rsize=16384,wsize=16384 ip=:::::eth0:dhcp
+""" % time.strftime("%d/%m/%Y at %H:%M:%S")
+    return cStringIO.StringIO(s)
+
 
 def main():
-    server = tftpy.TftpServer("/var/khepri/tftp-root/")
+    server = tftpy.TftpServer("/var/khepri/tftp-root/", dyn_file_func=hook_dispatcher)
     try:
         server.listen("10.8.1.1", 5000)
     except tftpy.TftpException, err: