created dhcpd configuration export function

mdb/models.py

@@ -138,6 +138,7 @@ class DomainCnameRecord(models.Model):
 
 class DhcpConfig(models.Model):
 	serial = models.IntegerField()
+	active_serial = models.IntegerField()
 	name = models.CharField(max_length=255)
 	authoritative = models.BooleanField()
 	ddns_update_style = models.CharField(max_length=63)
@@ -145,10 +146,56 @@ class DhcpConfig(models.Model):
 	max_lease_time = models.IntegerField(default=7200)
 	log_facility = models.CharField(max_length=255)
 
+	def dhcpd_configuration(self):
+		content = "# Autogenerated configuration %s\n" % datetime.datetime.now()
+		if self.authoritative:
+			content += "authoritative;\n"
+		content += "default-lease-time %d;\n" % self.default_lease_time
+		content += "max-lease-time %d;\n" % self.max_lease_time
+		content += "log-facility %s;\n" % self.log_facility
+		content += "ddns-update-style %s;\n" % self.ddns_update_style
+		
+
+		# time to write the subnet definitions
+		for subnet in self.ip4subnet_set.all():
+			content += "\n# %s\n" % subnet.name
+			content += "subnet %s netmask %s {\n" % (subnet.network, subnet.netmask)
+			
+			for option in subnet.dhcpoption_set.all():
+				content += "\toption %s %s;\n" % (option.key, option.value)
+
+			for option in subnet.dhcpcustomfield_set.all():
+				content += "\t%s;\n" % option.value
+
+			if subnet.dhcp_dynamic:
+				content += "\trange %s %s;\n" \
+					% (subnet.dhcp_dynamic_start, subnet.dhcp_dynamic_end)
+
+			content += "}\n"
+
+		# time to write host definitions
+		for subnet in self.ip4subnet_set.all():
+			for ip4address in subnet.ip4address_set.all():
+				if ip4address.interface_set.count() == 0:
+					continue
+				interface = ip4address.interface_set.get()
+				if not interface.dhcp_client:
+					continue
+				content += "\nhost %s {\n" % interface.host.hostname
+				content += "\thardware ethernet %s;\n" % interface.macaddr
+				content += "\tfixed-address %s.%s;\n" % \
+					(interface.host.hostname, interface.domain.domain_name)
+				if len(interface.pxe_filename) > 0:
+					content += "\tfilename \"%s\";\n" % interface.pxe_filename
+				content += "}\n"
+
+		return content
+
 	def __unicode__(self):
 		return self.name
 
 class Ip4Subnet(models.Model):
+
 	name = models.CharField(max_length=256)
 	netmask = models.IPAddressField()
 	network = models.IPAddressField()