libimcv: Pass TNC_SESSION_ID as argument instead as a environment variable

Doing so works on Windows as well.

src/libimcv/imv/_imv_policy

@@ -20,18 +20,20 @@
 # that, and use the "libimcv.policy_script = " option in strongswan.conf
 # to make strongSwan use yours instead of this default one.
 
-# Environment variables that this script gets 
+# Passed arguments
 #
-#    TNC_SESSION_ID 
+#    $1
+#         action
+#    $2
 #         unique session ID used as a reference by the policy
 #         manager.
 #
 case "$1" in
 start)
-	echo "start session $TNC_SESSION_ID"
+	echo "start session $2"
 	;;
 stop)
-	echo "stop session $TNC_SESSION_ID"
+	echo "stop session $2"
 	;;
 *)	echo "$0: unknown command '$1'"
 	exit 1

src/libimcv/imv/imv_database.c

@@ -261,9 +261,9 @@ METHOD(imv_database_t, policy_script, bool,
 	}
 
 	/* call the policy script */
-	snprintf(command, sizeof(command), "2>&1 TNC_SESSION_ID='%d' %s %s",
+	snprintf(command, sizeof(command), "2>&1 %s %s %d",
-			 session->get_session_id(session, NULL, NULL), this->script,
+			 this->script, start ? "start" : "stop",
-			 start ? "start" : "stop");
+			 session->get_session_id(session, NULL, NULL));
 	DBG3(DBG_IMV, "running policy script: %s", command);
 
 	shell = popen(command, "r");
@@ -363,4 +363,3 @@ imv_database_t *imv_database_create(char *uri, char *script)
 
 	return &this->public;
 }
-

src/libimcv/imv/imv_policy_manager.c

@@ -278,7 +278,7 @@ static bool policy_stop(database_t *db, int session_id)
 int main(int argc, char *argv[])
 {
 	database_t *db;
-	char *uri, *tnc_session_id;
+	char *uri;
 	int session_id;
 	bool start, success;
 
@@ -299,7 +299,7 @@ int main(int argc, char *argv[])
 		exit(SS_RC_INITIALIZATION_FAILED);
 	}
 
-	if (argc < 2)
+	if (argc < 3)
 	{
 		usage();
 		exit(SS_RC_INITIALIZATION_FAILED);
@@ -318,14 +318,7 @@ int main(int argc, char *argv[])
 		exit(SS_RC_INITIALIZATION_FAILED);
 	}
 
-	/* get session ID */
+	session_id = atoi(argv[2]);
-	tnc_session_id = getenv("TNC_SESSION_ID");
-	if (!tnc_session_id)
-	{
-		fprintf(stderr, "environment variable TNC_SESSION_ID is not defined\n");
-		exit(SS_RC_INITIALIZATION_FAILED);
-	}
-	session_id = atoi(tnc_session_id);
 
 	/* attach IMV database */
 	uri = lib->settings->get_str(lib->settings,

src/libimcv/imv/imv_policy_manager_usage.c

@@ -24,6 +24,5 @@ void usage(void)
 {
 	printf("\
 Usage:\n\
-  imv_policy_manager start|stop\n");
+  imv_policy_manager start|stop <tnc-session-id>\n");
 }
-