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, 67 insertions, 0 deletions

diff --git a/src/lbtest_user.hh b/src/lbtest_user.hh
new file mode 100644
index 0000000..534d4d0
--- /dev/null
+++ b/src/lbtest_user.hh
@@ -0,0 +1,67 @@
+/*
+ * Module: lbtest_user.hh
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+#ifndef __LBTEST_USER_HH__
+#define __LBTEST_USER_HH__
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <iostream>
+#include "lbtest.hh"
+
+using namespace std;
+
+/**
+ *
+ *
+ **/
+class LBTestUser : public LBTest 
+{
+public:
+  LBTestUser(bool debug) : 
+    LBTest(debug)
+  {}
+  LBTestUser(bool debug, string &script) :
+    LBTest(debug),
+    _script(script)
+  {}
+  ~LBTestUser() {}
+
+  void
+  send(LBHealth &health);
+
+  std::string
+  get_script() const {return _script;}
+
+  void
+  set_script(std::string &script) {_script = script;}
+
+  string
+  dump();
+
+  string
+  name() {return string("user");}
+
+  //override, don't need base support for these.
+  void
+  init() {_status_line=name();}
+  void
+  start() {}
+  int
+  recv(LBHealth &health) {return (_state != LBTest::K_SUCCESS) ? -1 : 1;}
+
+
+private: //methods
+  int
+  system_out(const string &cmd, string &out);
+
+private: //variables
+  string _script;
+};
+
+#endif //__LBTEST_USER_HH__