71 lines
1.9 KiB
Python
Executable File
71 lines
1.9 KiB
Python
Executable File
#!/usr/bin/env python
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import sys, logging
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import tftpy
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import re
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import signal
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LEASES_FILE = "/var/lib/dhcp/dhcpd.leases"
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def get_mac(address):
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"""Gets MAC address from dhcpd leases based on IP address."""
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f = open(LEASES_FILE,"r")
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in_lease = False
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for line in f:
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line = line.split("#")[0]
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parts = line.strip().split()
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if not parts:
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continue
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if not in_lease and parts[0] == "lease":
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in_lease = parts[1]
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continue
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field_name = parts[0]
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if field_name == "hardware" and in_lease == address:
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return parts[2][:-1]
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elif field_name == "}":
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in_lease = False
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return None
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file_hooks = {}
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def hook_dispatcher(path, remote):
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for pattern, hook in file_hooks.iteritems():
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match = re.match(pattern, path)
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if match:
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data = hook(path, match, remote)
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if data:
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return data
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return None
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def hook(pattern, match_mac=None):
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def decorator(f):
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def wrapper(path, match, remote):
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if match_mac:
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mac = get_mac([0])
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if match_mac and mac != match_mac:
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return None
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return f(path, match, remote)
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file_hooks[pattern] = wrapper
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return f
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return decorator
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import hooks
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def main():
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def sighup_handler(signum, frame):
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signal.siginterrupt(signal.SIGHUP, False)
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sys.stderr.write("Reloading config...\n")
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sys.stderr.flush()
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file_hooks = {}
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reload(hooks)
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signal.signal(signal.SIGHUP, sighup_handler)
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server = tftpy.TftpServer("/var/khepri/tftp-root/", dyn_file_func=hook_dispatcher)
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try:
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server.listen("10.8.1.1", 5000)
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except tftpy.TftpException, err:
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sys.stderr.write("%s\n" % str(err))
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sys.exit(1)
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except KeyboardInterrupt:
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pass
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