check in for Bug 6959

Add the ability to run a user defined script to determine wan load-balancing interface health

includes sample http test (scripts/http_test.pl). Configuration will look as follows:

 wan {
     interface-health eth0 {
         nexthop 10.3.0.1
         test 1 {
             test-script /tmp/http_test.pl
             type user-defined
         }
     }
     interface-health eth1 {
         nexthop 10.3.0.1
         test 1 {
             test-script /tmp/http_test.pl
             type user-defined
         }
     }

With corresponding output:

vyatta@vyatta# run show wan-load-balance
Interface:  eth0
  Status:  active
  Last Status Change:  Wed Mar 30 19:03:59 2011
  +Test:  user  Script: /tmp/http_test.pl
    Last Interface Success:  0s
    Last Interface Failure:  n/a
    # Interface Failure(s):  0

Interface:  eth1
  Status:  failed
  Last Status Change:  Wed Mar 30 19:03:59 2011
  -Test:  user  Script: /tmp/http_test.pl
    Last Interface Success:  n/a
    Last Interface Failure:  0s
    # Interface Failure(s):  52

Scripts returns 0 for success, non-zero for failure.

1 files changed, 3 insertions, 12 deletions

diff --git a/src/lbtest_ttl.cc b/src/lbtest_ttl.cc
index 551db07..d3a0d26 100644
--- a/src/lbtest_ttl.cc
+++ b/src/lbtest_ttl.cc
@@ -37,18 +37,6 @@ using namespace std;
  *
  **/
 void
-LBTestTTL::init() 
-{
-  if (_debug) {
-    cout << "LBTestTTL::init(): initializing test system" << endl;
-  }
-}
-
-/**
- *
- *
- **/
-void
 LBTestTTL::send(LBHealth &health)
 {
   if (_debug) {
@@ -65,6 +53,9 @@ LBTestTTL::send(LBHealth &health)
     }
   }
   
+  //set the status line to be used when the show command is invoked
+  _status_line = name() + "\t" + string("Target: ") + target;
+
   //don't have target yet...
   if (target.empty()) {
     return;