diff options
Diffstat (limited to 'src')
| -rwxr-xr-x | src/conf_mode/ipsec-settings.py | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/src/conf_mode/ipsec-settings.py b/src/conf_mode/ipsec-settings.py index 7ca2d9b44..771f635a0 100755 --- a/src/conf_mode/ipsec-settings.py +++ b/src/conf_mode/ipsec-settings.py @@ -18,7 +18,9 @@ import re import os from time import sleep -from sys import exit + +# Top level import so that configd can override it +from sys import argv from vyos.config import Config from vyos import ConfigError @@ -216,6 +218,20 @@ def generate(data): remove_confs(delim_ipsec_l2tp_begin, delim_ipsec_l2tp_end, ipsec_secrets_file) remove_confs(delim_ipsec_l2tp_begin, delim_ipsec_l2tp_end, ipsec_conf_file) +def is_charon_responsive(): + # Check if charon responds to strokes + # + # Sometimes it takes time to fully initialize, + # so waiting for the process to come to live isn't always enough + # + # There's no official "no-op" stroke so we use the "memusage" stroke as a substitute + from os import system + res = system("ipsec stroke memusage >&/dev/null") + if res == 0: + return True + else: + return False + def restart_ipsec(): try: # Restart the IPsec daemon when it's running. @@ -223,17 +239,28 @@ def restart_ipsec(): # there's a chance that this script will run before charon is up, # so we can't assume it's running and have to check and wait if needed. - # First, wait for charon to get started by the old ipsec.pl script. + # But before everything else, there's a catch! + # This script is run from _two_ places: "vpn ipsec options" and the top level "vpn" node + # When IPsec isn't set up yet, and a user wants to commit an IPsec config with some + # "vpn ipsec settings", this script will first be called before StrongSWAN is started by vpn-config.pl! + # Thus if this script is run from "settings" _and_ charon is unresponsive, + # we shouldn't wait for it, else there will be a deadlock. + # We indicate that by running the script under vyshim from "vpn ipsec options" (which sets a variable named "argv") + # and running it without configd from "vpn ipsec" + if "from-options" in argv: + if not is_charon_responsive(): + return + + # If we got this far, then we actually need to restart StrongSWAN + + # First, wait for charon to get started by the old vpn-config.pl script. from time import sleep, time from os import system now = time() while True: if (time() - now) > 60: raise OSError("Timeout waiting for the IPsec process to become responsive") - # There's no oficial "no-op" stroke, - # so we use memusage to check if charon is alive and responsive - res = system("ipsec stroke memusage >&/dev/null") - if res == 0: + if is_charon_responsive(): break sleep(5) |