def getMaskAndSpace(address, prefixlen):
addresses = 2**(32 - prefixlen)
mask = util.iptoint(address)
mask = bin(mask)
mask = mask[:-(32 - prefixlen)]
mask = mask + ('0' * (32 - prefixlen))
mask = int(mask[2:], 2)
return (util.inttoip(mask), addresses)
self.log.info('%s access is authorized, '
'request will be satisfied' % item)
# construct reply
buf[BOOTP_OP] = BOOTREPLY
self.log.info('Client IP: %s' % socket.inet_ntoa(buf[7]))
if buf[BOOTP_CIADDR] == '\x00\x00\x00\x00':
self.log.debug('Client needs its address')
ipaddr = iptoint(self.pool_start)
ip = None
if mac_str in self.ippool:
ip = self.ippool[mac_str]
self.log.info('Lease for MAC %s already defined as IP %s' % \
(mac_str, ip))
else:
for idx in xrange(self.pool_count):
ipkey = inttoip(ipaddr+idx)
self.log.debug('Check for IP %s' % ipkey)
if ipkey not in self.ippool.values():
self.ippool[mac_str] = ipkey
ip = ipkey
break
if not ip:
raise BootpError('No more IP available in definined pool')
mask = iptoint(self.netconfig['mask'])
reply_broadcast = iptoint(ip) & mask
reply_broadcast |= (~mask)&((1<<32)-1)
buf[BOOTP_YIADDR] = socket.inet_aton(ip)
buf[BOOTP_SECS] = 0
buf[BOOTP_FLAGS] = BOOTP_FLAGS_NONE
addr = (inttoip(reply_broadcast), addr[1])
self.log.debug('Reply to: %s:%s' % addr)
self.log.info('%s access is authorized, '
'request will be satisfied' % item)
# construct reply
buf[BOOTP_OP] = BOOTREPLY
self.log.info('Client IP: %s' % socket.inet_ntoa(buf[7]))
if buf[BOOTP_CIADDR] == '\x00\x00\x00\x00':
self.log.debug('Client needs its address')
ipaddr = iptoint(self.pool_start)
ip = None
if mac_str in self.ippool:
ip = self.ippool[mac_str]
self.log.info('Lease for MAC %s already defined as IP %s' % \
(mac_str, ip))
else:
for idx in xrange(self.pool_count):
ipkey = inttoip(ipaddr + idx)
self.log.debug('Check for IP %s' % ipkey)
if ipkey not in self.ippool.values():
self.ippool[mac_str] = ipkey
ip = ipkey
break
if not ip:
raise BootpError('No more IP available in definined pool')
mask = iptoint(self.netconfig['mask'])
reply_broadcast = iptoint(ip) & mask
reply_broadcast |= (~mask) & ((1 << 32) - 1)
buf[BOOTP_YIADDR] = socket.inet_aton(ip)
buf[BOOTP_SECS] = 0
buf[BOOTP_FLAGS] = BOOTP_FLAGS_NONE
addr = (inttoip(reply_broadcast), addr[1])
self.log.debug('Reply to: %s:%s' % addr)
def initAddresses(the_queue, subspaces):
for space in subspaces:
mask, addresses = getMaskAndSpace(
space.split('/')[0], int(space.split('/')[1]))
for i in range(0, addresses):
the_queue.put(util.inttoip(util.iptoint(mask) + i))
def construct_reply(self, buf, host_params, state, req_addr, options, dhcp_msg_type, source_address):
buf[BOOTP_OP] = BOOTREPLY
self.log.info("Client IP: %s" % socket.inet_ntoa(buf[7]))
self.log.info("BOOTP_CIADDR %r" % buf[BOOTP_CIADDR])
if buf[BOOTP_CIADDR] == '\x00\x00\x00\x00':
self.log.info("Client needs its address")
self.log.info("Server netconfig is: {0}".format(self.server_config))
mask = iptoint(self.server_config['mask'])
reply_broadcast = iptoint(host_params['ip_address']) & mask
reply_broadcast |= (~mask)&((1<<32)-1)
buf[BOOTP_YIADDR] = socket.inet_aton(host_params['ip_address'])
buf[BOOTP_SECS] = 0
buf[BOOTP_FLAGS] = BOOTP_FLAGS_NONE
req_addr = (req_addr[0], req_addr[1])
self.log.info("Reply to: %s:%s" % req_addr)
self.log.info("Options: {0}".format(options))
buf[BOOTP_SIADDR] = socket.inet_aton(source_address)
self.log.info("req_addr is: {0}".format(req_addr[0]))
buf[BOOTP_GIADDR] = socket.inet_aton(req_addr[0])
# sname
buf[BOOTP_SNAME] = '.'.join(['unknown', 'localdomain'])
# file
ipxe_flag = self.is_this_ipxe(options)
self.log.info("Ipxe flag: {0}".format(ipxe_flag))
if self.is_this_ipxe(options):
pxe_filename = "http://local.domain.ru/PXE/iboot.ipxe/${mac}"
else:
pxe_filename = host_params['pxe_filename']
buf[BOOTP_FILE] = pxe_filename
if not dhcp_msg_type:
self.log.info("No DHCP message type found, discarding request")
return
if dhcp_msg_type == DHCP_DISCOVER:
self.log.info("DHCP DISCOVER")
dhcp_reply = DHCP_OFFER
self.log.info("Offering lease for MAC %s: IP %s" % (host_params['mac'], host_params['ip_address']))
elif dhcp_msg_type == DHCP_REQUEST:
self.log.info("DHCP REQUEST")
dhcp_reply = DHCP_ACK
self.log.info("New lease for MAC %s: IP %s" % (host_params['mac'], host_params['ip_address']))
elif dhcp_msg_type == DHCP_RELEASE:
self.log.info("DHCP RELEASE")
# if not notify:
return False
elif dhcp_msg_type == DHCP_INFORM:
self.log.info("DHCP INFORM")
return False
else:
self.log.info("Unmanaged DHCP message: %d" % dhcp_msg_type)
return
# Store the filename
if host_params['pxe_filename']:
self.log.info("Filename for IP %s is '%s'" % (host_params['ip_address'], host_params['pxe_filename']))
self.filepool[host_params['ip_address']] = host_params['pxe_filename']
else:
self.log.info("No filename defined for IP %s" % host_params['ip_address'])
pkt = struct.pack(DHCPFormat, *buf)
pkt += struct.pack('!BBB', DHCP_MSG, 1, dhcp_reply)
# server = socket.inet_aton(self.server_config['ip_address'])
server = socket.inet_aton(source_address)
pkt += struct.pack('!BB4s', DHCP_SERVER, 4, server)
pkt += struct.pack('!BBI', DHCP_LEASE_TIME, 4, int(str(28800)))
mask = socket.inet_aton(host_params['mask'])
pkt += struct.pack('!BB4s', DHCP_IP_MASK, 4, mask)
gateway=socket.inet_aton(host_params['gateway'])
pkt += struct.pack('!BB4s', DHCP_IP_GATEWAY, 4, gateway)
dns = socket.inet_aton(host_params['dns'])
pkt += struct.pack('!BB4s', DHCP_IP_DNS, 4, dns)
# pkt += struct.pack('!BB%rs' % len(host_params['hostname']), DHCP_HOSTNAME, len(host_params['hostname']), host_params['hostname'])
pkt += struct.pack('!BB%ds' % len(host_params['hostname']), DHCP_HOSTNAME, len(host_params['hostname']), host_params['hostname'])
pkt += struct.pack('!BB%ds' % len(host_params['domain']), DHCP_DOMAIN, len(host_params['domain']), host_params['domain'])
pkt += struct.pack('!BB%ds' % len(host_params['pxe_path']), DHCP_ROOT_PATH, len(host_params['pxe_path']), host_params['pxe_path'])
reply_broadcast_ip = socket.inet_aton(inttoip(reply_broadcast))
pkt += struct.pack('!BB4s', DHCP_BROADCAST_ADDR, 4, reply_broadcast_ip)
vendor_spec_len = len(host_params['pxe_menu_http'])
vendor_spec_len_all = len(host_params['pxe_menu_http']) + 2
pkt += struct.pack('!BBBB%ds' % vendor_spec_len, DHCP_VENDOR_SPECIFIC, vendor_spec_len_all, DHCP_PXELINUX_PATHPREFIX,
vendor_spec_len, host_params['pxe_menu_http'])
pkt += struct.pack('!BBI', DHCP_RENEWAL_TIME, 4, int(str(14400)))
pkt += struct.pack('!BBI', DHCP_REBINDING_TIME, 4, int(str(25200)))
pkt += struct.pack('!BB4s', DHCP_UNASSIGNED, 4, server)
pkt += struct.pack('!BB', DHCP_END, 0)
#if pxe:
# self.uuidpool[mac_addr] = uuid
return pkt
def binary_to_ip(self, binary):
return inttoip(int(hexlify(binary), 16))
def handle(self, sock, addr, data):
sender = addr
self.log.info('Sender: %s on socket %s' % (addr, sock.getsockname()))
if len(data) < DHCPFormatSize:
self.log.error('Cannot be a DHCP or BOOTP request - too small!')
tail = data[DHCPFormatSize:]
buf = list(struct.unpack(DHCPFormat, data[:DHCPFormatSize]))
if buf[BOOTP_OP] != BOOTREQUEST:
self.log.warn('Not a BOOTREQUEST')
return
options = self.parse_options(tail)
if options is None:
self.log.warn('Error in option parsing, ignore request')
return
# Extras (DHCP options)
try:
dhcp_msg_type = ord(options[53][0])
except KeyError:
dhcp_msg_type = None
server_addr = self.netconfig['address']
mac_addr = buf[BOOTP_CHADDR][:6]
gi_addr = buf[BOOTP_GIADDR][:4]
mac_str = ':'.join(['%02X' % ord(x) for x in mac_addr])
gi_str = '.'.join(['%d' % ord(x) for x in gi_addr])
self.log.debug("Gateway address: %s" % gi_str)
# is the UUID received (PXE mode)
if 97 in options and len(options[97]) == 17:
uuid = options[97][1:]
pxe = True
self.log.info('PXE UUID has been received')
# or retrieved from the cache (DHCP mode)
else:
uuid = self.uuidpool.get(mac_addr, None)
pxe = False
self.log.info('PXE UUID not present in request')
uuid_str = uuid and ('%s-%s-%s-%s-%s' % \
tuple([hexlify(x) for x in uuid[0:4], uuid[4:6], uuid[6:8],
uuid[8:10], uuid[10:16]])).upper()
if uuid_str:
self.log.info('UUID is %s for MAC %s' % (uuid_str, mac_str))
hostname = ''
filename = ''
# Basic state machine
currentstate = self.states.setdefault(mac_str, self.ST_IDLE)
newstate = currentstate
if currentstate == self.ST_IDLE:
if pxe and (dhcp_msg_type == DHCP_DISCOVER):
# BIOS is booting up, and try to locate a DHCP server
newstate = self.ST_PXE
elif currentstate == self.ST_PXE:
if not pxe and (dhcp_msg_type == DHCP_REQUEST):
# OS is booting up, and confirm a previous DHCP dicovery
newstate = self.ST_DHCP
else: # currentstate == self.ST_DHCP
if pxe:
# OS was running but the BIOS is performing a DHCP request:
# board has been restarted
newstate = self.ST_PXE
# if the state has not evolved from idle, there is nothing to do
if newstate == self.ST_IDLE:
self.log.info('Request from %s ignored (idle state)' % mac_str)
sdhcp = self.config.get_bootp_allow_simple_dhcp()
simple_dhcp = sdhcp and to_bool(sdhcp)
if not simple_dhcp:
return
# construct reply
buf[BOOTP_OP] = BOOTREPLY
self.log.info('Client IP: %s' % socket.inet_ntoa(buf[7]))
if buf[BOOTP_CIADDR] == '\x00\x00\x00\x00':
self.log.debug('Client needs its address')
host_data = self.get_host_data_for_mac(mac_str)
ipaddr = host_data['address']
self.log.debug("IPADDR: {0}".format(ipaddr))
if not ipaddr:
self.log.error("Can't get IP address!")
return
ip = None
if mac_str in self.ippool:
ip = self.ippool[mac_str]
self.log.info('Lease for MAC %s already defined as IP %s' % \
(mac_str, ip))
else:
self.ippool[mac_str] = ipaddr
ip = ipaddr
if not ip:
#raise BootpError('No more IP available in definined pool')
self.log.error("Can not find IP assigned to mac: %s" % mac_str)
return
mask = iptoint(self.netconfig['mask'])
reply_broadcast = iptoint(ip) & mask
reply_broadcast |= (~mask)&((1<<32)-1)
buf[BOOTP_YIADDR] = socket.inet_aton(ip)
buf[BOOTP_SECS] = 0
buf[BOOTP_FLAGS] = BOOTP_FLAGS_NONE
addr = (inttoip(reply_broadcast), addr[1])
self.log.debug('Reply to: %s:%s' % addr)
else:
buf[BOOTP_YIADDR] = buf[BOOTP_CIADDR]
ip = socket.inet_ntoa(buf[BOOTP_YIADDR])
buf[BOOTP_SIADDR] = socket.inet_aton(server_addr)
if gi_addr:
self.log.debug('Reply via gateway: %s' % gi_str)
buf[BOOTP_GIADDR] = socket.inet_aton(gi_str)
# sname
buf[BOOTP_SNAME] = \
'.'.join([host_data['hostname'], host_data['domain']])
# file
buf[BOOTP_FILE] = 'boot_file' in host_data and host_data['boot_file'] or self.config.get_bootp_default_boot_file()
if not dhcp_msg_type:
self.log.warn('No DHCP message type found, discarding request')
return
if dhcp_msg_type == DHCP_DISCOVER:
self.log.debug('DHCP DISCOVER')
dhcp_reply = DHCP_OFFER
self.log.info('Offering lease for MAC %s: IP %s' % \
(mac_str, ip))
elif dhcp_msg_type == DHCP_REQUEST:
self.log.debug('DHCP REQUEST')
dhcp_reply = DHCP_ACK
self.log.info('New lease for MAC %s: IP %s' % \
(mac_str, ip))
elif dhcp_msg_type == DHCP_RELEASE:
self.log.info('DHCP RELEASE')
if not self.notify:
return
elif dhcp_msg_type == DHCP_INFORM:
self.log.info('DHCP INFORM')
return
elif dhcp_msg_type == DHCP_DECLINE:
self.log.debug('DHCP DECLINE')
return
else:
self.log.error('Unmanaged DHCP message: %d' % dhcp_msg_type)
return
pkt = struct.pack(DHCPFormat, *buf)
pkt += struct.pack('!BBB', DHCP_MSG, 1, dhcp_reply)
#server = socket.inet_aton(server_addr)
# FIXME: Hardcoded relay and netmask
# Add something in lines of:
# networks:
# 10.40.13.160:
# netmask: 255.255.255.224
# gateway: 10.40.13.160
# dns: 10.40.1.80, 10.40.1.81
server = socket.inet_aton('10.40.13.161')
pkt += struct.pack('!BB4s', DHCP_SERVER, 4, server)
#mask = socket.inet_aton(self.netconfig['mask'])
mask = socket.inet_aton('255.255.255.224')
pkt += struct.pack('!BB4s', DHCP_IP_MASK, 4, mask)
pkt += struct.pack('!BB4s', DHCP_IP_GATEWAY, 4, server)
# FIXME: Serving only default DNS for now
dns = self.config.get_bootp_default_dns()
if dns:
if dns.lower() == 'auto':
dns = self.get_dns_server() or socket.inet_ntoa(server)
dns = socket.inet_aton(dns)
pkt += struct.pack('!BB4s', DHCP_IP_DNS, 4, dns)
pkt += struct.pack('!BBI', DHCP_LEASE_TIME, 4,
int(self.config.get_bootp_default_lease_time()))
pkt += struct.pack('!BB', DHCP_END, 0)
# do not attempt to produce a PXE-augmented response for
# regular DHCP requests
if pxe:
extra_buf = self.build_pxe_options(options, server)
if not extra_buf:
return
else:
extra_buf = self.build_dhcp_options(hostname)
# update the UUID cache
if pxe:
self.uuidpool[mac_addr] = uuid
# send the response
if gi_addr:
sock.sendto(pkt + extra_buf, (gi_str, 67))
else:
sock.sendto(pkt + extra_buf, addr)
# update the current state
if currentstate != newstate:
self.log.info('Moving from state %d to state %d' % \
(currentstate, newstate))
self.states[mac_str] = newstate
def handle(self, sock, addr, data):
sender = addr
self.log.info('Sender: %s on socket %s' % (addr, sock.getsockname()))
if len(data) < DHCPFormatSize:
self.log.error('Cannot be a DHCP or BOOTP request - too small!')
tail = data[DHCPFormatSize:]
buf = list(struct.unpack(DHCPFormat, data[:DHCPFormatSize]))
if buf[BOOTP_OP] != BOOTREQUEST:
self.log.warn('Not a BOOTREQUEST')
return
options = self.parse_options(tail)
if options is None:
self.log.warn('Error in option parsing, ignore request')
return
# Extras (DHCP options)
try:
dhcp_msg_type = ord(options[53][0])
except KeyError:
dhcp_msg_type = None
server_addr = self.netconfig['address']
mac_addr = buf[BOOTP_CHADDR][:6]
gi_addr = buf[BOOTP_GIADDR][:4]
mac_str = ':'.join(['%02X' % ord(x) for x in mac_addr])
gi_str = '.'.join(['%d' % ord(x) for x in gi_addr])
self.log.debug("Gateway address: %s" % gi_str)
# is the UUID received (PXE mode)
if 97 in options and len(options[97]) == 17:
uuid = options[97][1:]
pxe = True
self.log.info('PXE UUID has been received')
# or retrieved from the cache (DHCP mode)
else:
uuid = self.uuidpool.get(mac_addr, None)
pxe = False
self.log.info('PXE UUID not present in request')
uuid_str = uuid and ('%s-%s-%s-%s-%s' % \
tuple([hexlify(x) for x in uuid[0:4], uuid[4:6], uuid[6:8],
uuid[8:10], uuid[10:16]])).upper()
if uuid_str:
self.log.info('UUID is %s for MAC %s' % (uuid_str, mac_str))
hostname = ''
filename = ''
# Basic state machine
currentstate = self.states.setdefault(mac_str, self.ST_IDLE)
newstate = currentstate
if currentstate == self.ST_IDLE:
if pxe and (dhcp_msg_type == DHCP_DISCOVER):
# BIOS is booting up, and try to locate a DHCP server
newstate = self.ST_PXE
elif currentstate == self.ST_PXE:
if not pxe and (dhcp_msg_type == DHCP_REQUEST):
# OS is booting up, and confirm a previous DHCP dicovery
newstate = self.ST_DHCP
else: # currentstate == self.ST_DHCP
if pxe:
# OS was running but the BIOS is performing a DHCP request:
# board has been restarted
newstate = self.ST_PXE
# if the state has not evolved from idle, there is nothing to do
if newstate == self.ST_IDLE:
self.log.info('Request from %s ignored (idle state)' % mac_str)
sdhcp = self.config.get_bootp_allow_simple_dhcp()
simple_dhcp = sdhcp and to_bool(sdhcp)
if not simple_dhcp:
return
# construct reply
buf[BOOTP_OP] = BOOTREPLY
self.log.info('Client IP: %s' % socket.inet_ntoa(buf[7]))
if buf[BOOTP_CIADDR] == '\x00\x00\x00\x00':
self.log.debug('Client needs its address')
host_data = self.get_host_data_for_mac(mac_str)
ipaddr = host_data['address']
self.log.debug("IPADDR: {0}".format(ipaddr))
if not ipaddr:
self.log.error("Can't get IP address!")
return
ip = None
if mac_str in self.ippool:
ip = self.ippool[mac_str]
self.log.info('Lease for MAC %s already defined as IP %s' % \
(mac_str, ip))
else:
self.ippool[mac_str] = ipaddr
ip = ipaddr
if not ip:
#raise BootpError('No more IP available in definined pool')
self.log.error("Can not find IP assigned to mac: %s" % mac_str)
return
mask = iptoint(self.netconfig['mask'])
reply_broadcast = iptoint(ip) & mask
reply_broadcast |= (~mask) & ((1 << 32) - 1)
buf[BOOTP_YIADDR] = socket.inet_aton(ip)
buf[BOOTP_SECS] = 0
buf[BOOTP_FLAGS] = BOOTP_FLAGS_NONE
addr = (inttoip(reply_broadcast), addr[1])
self.log.debug('Reply to: %s:%s' % addr)
else:
buf[BOOTP_YIADDR] = buf[BOOTP_CIADDR]
ip = socket.inet_ntoa(buf[BOOTP_YIADDR])
buf[BOOTP_SIADDR] = socket.inet_aton(server_addr)
if gi_addr:
self.log.debug('Reply via gateway: %s' % gi_str)
buf[BOOTP_GIADDR] = socket.inet_aton(gi_str)
# sname
buf[BOOTP_SNAME] = \
'.'.join([host_data['hostname'], host_data['domain']])
# file
buf[BOOTP_FILE] = 'boot_file' in host_data and host_data[
'boot_file'] or self.config.get_bootp_default_boot_file()
if not dhcp_msg_type:
self.log.warn('No DHCP message type found, discarding request')
return
if dhcp_msg_type == DHCP_DISCOVER:
self.log.debug('DHCP DISCOVER')
dhcp_reply = DHCP_OFFER
self.log.info('Offering lease for MAC %s: IP %s' % \
(mac_str, ip))
elif dhcp_msg_type == DHCP_REQUEST:
self.log.debug('DHCP REQUEST')
dhcp_reply = DHCP_ACK
self.log.info('New lease for MAC %s: IP %s' % \
(mac_str, ip))
elif dhcp_msg_type == DHCP_RELEASE:
self.log.info('DHCP RELEASE')
if not self.notify:
return
elif dhcp_msg_type == DHCP_INFORM:
self.log.info('DHCP INFORM')
return
elif dhcp_msg_type == DHCP_DECLINE:
self.log.debug('DHCP DECLINE')
return
else:
self.log.error('Unmanaged DHCP message: %d' % dhcp_msg_type)
return
pkt = struct.pack(DHCPFormat, *buf)
pkt += struct.pack('!BBB', DHCP_MSG, 1, dhcp_reply)
#server = socket.inet_aton(server_addr)
# FIXME: Hardcoded relay and netmask
# Add something in lines of:
# networks:
# 10.40.13.160:
# netmask: 255.255.255.224
# gateway: 10.40.13.160
# dns: 10.40.1.80, 10.40.1.81
server = socket.inet_aton('10.40.13.161')
pkt += struct.pack('!BB4s', DHCP_SERVER, 4, server)
#mask = socket.inet_aton(self.netconfig['mask'])
mask = socket.inet_aton('255.255.255.224')
pkt += struct.pack('!BB4s', DHCP_IP_MASK, 4, mask)
pkt += struct.pack('!BB4s', DHCP_IP_GATEWAY, 4, server)
# FIXME: Serving only default DNS for now
dns = self.config.get_bootp_default_dns()
if dns:
if dns.lower() == 'auto':
dns = self.get_dns_server() or socket.inet_ntoa(server)
dns = socket.inet_aton(dns)
pkt += struct.pack('!BB4s', DHCP_IP_DNS, 4, dns)
pkt += struct.pack('!BBI', DHCP_LEASE_TIME, 4,
int(self.config.get_bootp_default_lease_time()))
pkt += struct.pack('!BB', DHCP_END, 0)
# do not attempt to produce a PXE-augmented response for
# regular DHCP requests
if pxe:
extra_buf = self.build_pxe_options(options, server)
if not extra_buf:
return
else:
extra_buf = self.build_dhcp_options(hostname)
# update the UUID cache
if pxe:
self.uuidpool[mac_addr] = uuid
# send the response
if gi_addr:
sock.sendto(pkt + extra_buf, (gi_str, 67))
else:
sock.sendto(pkt + extra_buf, addr)
# update the current state
if currentstate != newstate:
self.log.info('Moving from state %d to state %d' % \
(currentstate, newstate))
self.states[mac_str] = newstate
