dnsmasq: Direct import of version 2.51

Signed-off-by: San Mehat <san@google.com>

2 files changed, 145 insertions, 0 deletions

diff --git a/dbus/DBus-interface b/dbus/DBus-interface
new file mode 100755
index 0000000..8d578ca
--- /dev/null
+++ b/dbus/DBus-interface
@@ -0,0 +1,131 @@
+DBus support must be enabled at compile-time and run-time. Ensure 
+that src/config.h contains the line
+
+#define HAVE_DBUS.
+
+and that /etc/dnsmasq.conf contains the line
+
+enable-dbus
+
+Because dnsmasq can operate stand-alone from the DBus, and may need to provide
+service before the dbus daemon is available, it will continue to run
+if the DBus connection is not available at startup. The DBus will be polled 
+every 250ms until a connection is established. Start of polling and final
+connection establishment are both logged. When dnsmasq establishes a
+connection to the dbus, it sends the signal "Up". Anything controlling
+the server settings in dnsmasq should re-invoke the SetServers method
+(q.v.) when it sees this signal. This allows dnsmasq to be restarted
+and avoids startup races with the provider of nameserver information.
+
+
+Dnsmasq provides one service on the DBus: uk.org.thekelleys.dnsmasq
+and a single object: /uk/org/thekelleys/dnsmasq
+
+1. METHODS
+----------
+
+Methods are of the form
+
+uk.org.thekelleys.<method>
+
+Available methods are:
+
+GetVersion
+----------
+Returns a string containing the version of dnsmasq running.
+
+ClearCache
+----------
+Returns nothing. Clears the domain name cache and re-reads
+/etc/hosts. The same as sending dnsmasq a HUP signal.
+
+SetServers
+----------
+Returns nothing. Takes a set of arguments representing the new
+upstream DNS servers to be used by dnsmasq. IPv4 addresses are
+represented as a UINT32 (in network byte order) and IPv6 addresses
+are represented as sixteen BYTEs (since there is no UINT128 type).
+Each server address may be followed by one or more STRINGS, which are
+the domains for which the preceding server should be used.
+
+Examples.
+
+UINT32: <address1>
+UNIT32: <address2>
+
+is equivalent to
+
+--server=<address1> --server=<address2>
+
+
+UINT32 <address1>
+UINT32 <address2>
+STRING "somedomain.com"
+
+is equivalent to
+
+--server=<address1> --server=/somedomain.com/<address2> 
+
+UINT32 <address1>
+UINT32 <address2>
+STRING "somedomain.com"
+UINT32 <address3>
+STRING "anotherdomain.com"
+STRING "thirddomain.com"
+
+is equivalent to
+
+--server=<address1> 
+--server=/somedomain.com/<address2> 
+--server=/anotherdomain.com/thirddomain.com/<address3>
+
+Am IPv4 address of 0.0.0.0 is interpreted as "no address, local only",
+so
+
+UINT32: <0.0.0.0>
+STRING  "local.domain"
+
+is equivalent to
+
+--local=/local.domain/
+
+
+Each call to SetServers completely replaces the set of servers
+specified by via the DBus, but it leaves any servers specified via the
+command line or /etc/dnsmasq.conf or /etc/resolv.conf alone.
+
+2. SIGNALS
+----------
+
+If dnsmasq's DHCP server is active, it will send signals over DBUS whenever
+the DHCP lease database changes. Think of these signals as transactions on
+a database with the IP address acting as the primary key.
+
+Signals are of the form:
+
+uk.org.thekelleys.<signal>
+
+and their parameters are:
+
+STRING "192.168.1.115"
+STRING "01:23:45:67:89:ab"
+STRING "hostname.or.fqdn"
+
+
+Available signals are:
+
+DhcpLeaseAdded
+---------------
+
+This signal is emitted when a DHCP lease for a given IP address is created.
+
+DhcpLeaseDeleted
+----------------
+
+This signal is emitted when a DHCP lease for a given IP address is deleted.
+
+DhcpLeaseUpdated
+----------------
+
+This signal is emitted when a DHCP lease for a given IP address is updated.
+ 
diff --git a/dbus/dnsmasq.conf b/dbus/dnsmasq.conf
new file mode 100755
index 0000000..82b1c76
--- /dev/null
+++ b/dbus/dnsmasq.conf
@@ -0,0 +1,14 @@
+<!DOCTYPE busconfig PUBLIC
+ "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+	<policy user="root">
+		<allow own="uk.org.thekelleys.dnsmasq"/>
+		<allow send_destination="uk.org.thekelleys.dnsmasq"/>
+	</policy>
+	<policy context="default">
+                <deny own="uk.org.thekelleys.dnsmasq"/>
+                <deny send_destination="uk.org.thekelleys.dnsmasq"/>
+        </policy>
+</busconfig>
+