From 6515124a47364088f152151490c7a0cefb09b6fb Mon Sep 17 00:00:00 2001
From: Ville Mattila <vmattila@csc.fi>
Date: Fri, 28 Dec 2012 10:26:13 +0200
Subject: check_fping: IPv6 support

Add command line options -4 and -6 (--use-ipv4 and
--use-ipv6) to check_fping. IPv4 is used by default,
maintaining backwards compatibility with older
check_fping versions. IPv6 support requires the
fping6 program.

The implementation is really just an imitation of
check_ping IPv6 support: Plugin command line option
-4/-6 designates whether to run fping/fping6.

Please note that especially the changes to
configure.in might be all wrong - I don't know
what's the proper autoconf way, patching
configure.in just seemed to work for me.

diff --git a/configure.in b/configure.in
index 1d4ed00..93b355e 100644
--- a/configure.in
+++ b/configure.in
@@ -1378,6 +1378,17 @@ else
 	AC_MSG_WARN([Get fping from http://www.fping.com in order to make check_fping plugin])
 fi
 
+AC_PATH_PROG(PATH_TO_FPING6,fping6)
+AC_ARG_WITH(fping6_command,
+            ACX_HELP_STRING([--with-fping6-command=PATH],
+                            [Path to fping6 command]), PATH_TO_FPING6=$withval)
+if test -n "$PATH_TO_FPING6"
+then
+	AC_DEFINE_UNQUOTED(PATH_TO_FPING6,"$PATH_TO_FPING6",[path to fping6])
+else
+	AC_MSG_WARN([Get fping6 from http://www.fping.com in order to make check_fping plugin])
+fi
+
 AC_PATH_PROG(PATH_TO_SSH,ssh)
 AC_ARG_WITH(ssh_command,
             ACX_HELP_STRING([--with-ssh-command=PATH],
diff --git a/plugins/check_fping.c b/plugins/check_fping.c
index 675a547..f4792f0 100644
--- a/plugins/check_fping.c
+++ b/plugins/check_fping.c
@@ -72,6 +72,7 @@ main (int argc, char **argv)
 /* normaly should be  int result = STATE_UNKNOWN; */
 
   int status = STATE_UNKNOWN;
+  char *fping_prog = NULL;
   char *server = NULL;
   char *command_line = NULL;
   char *input_buffer = NULL;
@@ -96,7 +97,16 @@ main (int argc, char **argv)
   if (packet_interval)
     xasprintf(&option_string, "%s-p %d ", option_string, packet_interval);
 
-  xasprintf (&command_line, "%s %s-b %d -c %d %s", PATH_TO_FPING,
+#ifdef USE_IPV6
+  if (address_family == AF_INET6)
+    fping_prog = strdup(PATH_TO_FPING6);
+  else
+    fping_prog = strdup(PATH_TO_FPING);
+#else
+  fping_prog = strdup(PATH_TO_FPING);
+#endif
+
+  xasprintf (&command_line, "%s %s-b %d -c %d %s", fping_prog,
             option_string, packet_size, packet_count, server);
 
   if (verbose)
@@ -241,6 +251,8 @@ process_arguments (int argc, char **argv)
     {"verbose", no_argument, 0, 'v'},
     {"version", no_argument, 0, 'V'},
     {"help", no_argument, 0, 'h'},
+    {"use-ipv4", no_argument, 0, '4'},
+    {"use-ipv6", no_argument, 0, '6'},
     {0, 0, 0, 0}
   };
 
@@ -258,7 +270,7 @@ process_arguments (int argc, char **argv)
   }
 
   while (1) {
-    c = getopt_long (argc, argv, "+hVvH:c:w:b:n:T:i:", longopts, &option);
+    c = getopt_long (argc, argv, "+hVvH:c:w:b:n:T:i:46", longopts, &option);
 
     if (c == -1 || c == EOF || c == 1)
       break;
@@ -281,6 +293,16 @@ process_arguments (int argc, char **argv)
       }
       server_name = strscpy (server_name, optarg);
       break;
+    case '4':                 /* IPv4 only */
+      address_family = AF_INET;
+      break;
+    case '6':                 /* IPv6 only */
+#ifdef USE_IPV6
+      address_family = AF_INET6;
+#else
+      usage (_("IPv6 support not available\n"));
+#endif
+      break;
     case 'c':
       get_threshold (optarg, rv);
       if (rv[RTA]) {
@@ -402,6 +424,8 @@ print_help (void)
   printf (UT_HELP_VRSN);
   printf (UT_EXTRA_OPTS);
 
+  printf (UT_IPv46);
+
   printf (" %s\n", "-H, --hostname=HOST");
   printf ("    %s\n", _("name or IP Address of host to ping (IP Address bypasses name lookup, reducing system load)"));
   printf (" %s\n", "-w, --warning=THRESHOLD");
@@ -422,6 +446,9 @@ print_help (void)
   printf (" %s\n", _("which triggers a WARNING or CRITICAL state, and <pl> is the percentage of"));
   printf (" %s\n", _("packet loss to trigger an alarm state."));
 
+  printf ("\n");
+  printf (" %s\n", _("IPv4 is used by default. Specify -6 to use IPv6."));
+
   printf (UT_SUPPORT);
 }
 
-- 
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