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# A demo of using the RAS API from Python
import sys
import win32ras
# The error raised if we can not
class ConnectionError(Exception):
pass
def Connect(rasEntryName, numRetries = 5):
"""Make a connection to the specified RAS entry.
Returns a tuple of (bool, handle) on success.
- bool is 1 if a new connection was established, or 0 is a connection already existed.
- handle is a RAS HANDLE that can be passed to Disconnect() to end the connection.
Raises a ConnectionError if the connection could not be established.
"""
assert numRetries > 0
for info in win32ras.EnumConnections():
if info[1].lower()==rasEntryName.lower():
print("Already connected to", rasEntryName)
return 0, info[0]
dial_params, have_pw = win32ras.GetEntryDialParams(None, rasEntryName)
if not have_pw:
print("Error: The password is not saved for this connection")
print("Please connect manually selecting the 'save password' option and try again")
sys.exit(1)
print("Connecting to", rasEntryName, "...")
retryCount = numRetries
while retryCount > 0:
rasHandle, errCode = win32ras.Dial(None, None, dial_params, None)
if win32ras.IsHandleValid(rasHandle):
bValid = 1
break
print("Retrying...")
win32api.Sleep(5000)
retryCount = retryCount - 1
if errCode:
raise ConnectionError(errCode, win32ras.GetErrorString(errCode))
return 1, rasHandle
def Disconnect(handle):
if type(handle)==type(''): # have they passed a connection name?
for info in win32ras.EnumConnections():
if info[1].lower()==handle.lower():
handle = info[0]
break
else:
raise ConnectionError(0, "Not connected to entry '%s'" % handle)
win32ras.HangUp(handle)
usage="""rasutil.py - Utilities for using RAS
Usage:
rasutil [-r retryCount] [-c rasname] [-d rasname]
-r retryCount - Number of times to retry the RAS connection
-c rasname - Connect to the phonebook entry specified by rasname
-d rasname - Disconnect from the phonebook entry specified by rasname
"""
def Usage(why):
print(why)
print(usage)
sys.exit(1)
if __name__=='__main__':
import getopt
try:
opts, args = getopt.getopt(sys.argv[1:], "r:c:d:")
except getopt.error as why:
Usage(why)
retries = 5
if len(args) != 0:
Usage("Invalid argument")
for opt, val in opts:
if opt=='-c':
Connect(val, retries)
if opt=='-d':
Disconnect(val)
if opt=='-r':
retries = int(val)