Add --enable-ubus option.

dbus/DBus-interface

@@ -243,6 +243,10 @@ IPv4 or IPv6 address of the lease to remove.
 Note that this function will trigger the DhcpLeaseRemoved signal and the
 configured DHCP lease script will be run with the "del" action.
 
+GetMetrics
+----------
+
+Returns an array with various metrics for DNS and DHCP.
 
 
 2. SIGNALS

man/dnsmasq.8

@@ -366,6 +366,11 @@ been built with DBus support. If the service name is given, dnsmasq
 provides service at that name, rather than the default which is 
 .B uk.org.thekelleys.dnsmasq
 .TP 
+.B --enable-ubus
+Enable dnsmasq UBus interface. It sends notifications via UBus on
+DHCPACK and DHCPRELEASE events. Furthermore it offers metrics.
+Requires that dnsmasq has been built with UBus support.
+.TP
 .B \-o, --strict-order
 By default, dnsmasq will send queries to any of the upstream servers
 it knows about and tries to favour servers that are known to

src/dnsmasq.c

@@ -225,6 +225,11 @@ int main (int argc, char **argv)
     die(_("loop detection not available: set HAVE_LOOP in src/config.h"), NULL, EC_BADCONF);
 #endif
 
+#ifndef HAVE_UBUS
+  if (option_bool(OPT_UBUS))
+    die(_("Ubus not available: set HAVE_UBUS in src/config.h"), NULL, EC_BADCONF);
+#endif
+  
   if (daemon->max_port < daemon->min_port)
     die(_("max_port cannot be smaller than min_port"), NULL, EC_BADCONF);
 
@@ -950,7 +955,8 @@ int main (int argc, char **argv)
 #endif
 
 #ifdef HAVE_UBUS
-      set_ubus_listeners();
+      if (option_bool(OPT_UBUS)
+	  set_ubus_listeners();
 #endif
 	  
 #ifdef HAVE_DHCP
@@ -1084,7 +1090,8 @@ int main (int argc, char **argv)
 #endif
 
 #ifdef HAVE_UBUS
-      check_ubus_listeners();
+      if (daemon->enable_ubus)
+        check_ubus_listeners();
 #endif
 
       check_dns_listeners(now);

src/dnsmasq.h

@@ -255,7 +255,8 @@ struct event_desc {
 #define OPT_MAC_HEX        55
 #define OPT_TFTP_APREF_MAC 56
 #define OPT_RAPID_COMMIT   57
-#define OPT_LAST           58
+#define OPT_UBUS           58
+#define OPT_LAST           59
 
 /* extra flags for my_syslog, we use a couple of facilities since they are known 
    not to occupy the same bits as priorities, no matter how syslog.h is set up. */

src/option.c

@@ -163,6 +163,7 @@ struct myoption {
 #define LOPT_RAPID_COMMIT  351
 #define LOPT_DUMPFILE      352
 #define LOPT_DUMPMASK      353
+#define LOPT_UBUS          354
  
 #ifdef HAVE_GETOPT_LONG
 static const struct option opts[] =  
@@ -233,6 +234,7 @@ static const struct myoption opts[] =
     { "txt-record", 1, 0, 'Y' },
     { "dns-rr", 1, 0, LOPT_RR },
     { "enable-dbus", 2, 0, '1' },
+    { "enable-ubus", 0, 0, LOPT_UBUS },
     { "bootp-dynamic", 2, 0, '3' },
     { "dhcp-mac", 1, 0, '4' },
     { "no-ping", 0, 0, '5' },
@@ -420,6 +422,7 @@ static struct {
   { 'z', OPT_NOWILD, NULL, gettext_noop("Bind only to interfaces in use."), NULL },
   { 'Z', OPT_ETHERS, NULL, gettext_noop("Read DHCP static host information from %s."), ETHERSFILE },
   { '1', ARG_ONE, "[=<busname>]", gettext_noop("Enable the DBus interface for setting upstream servers, etc."), NULL },
+  { LOPT_UBUS, OPT_UBUS, NULL, gettext_noop("Enable the UBus interface."), NULL },
   { '2', ARG_DUP, "<interface>", gettext_noop("Do not provide DHCP on this interface, only provide DNS."), NULL },
   { '3', ARG_DUP, "[=tag:<tag>]...", gettext_noop("Enable dynamic address allocation for bootp."), NULL },
   { '4', ARG_DUP, "set:<tag>,<mac address>", gettext_noop("Map MAC address (with wildcards) to option set."), NULL },