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https://github.com/eblot/pybootd.git
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Initial support for architecture-based bootfile selection
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@ -9,7 +9,6 @@ pool_start = 192.168.25.100
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pool_count = 5
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domain = localdomain
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server_name = debug
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boot_file = pxelinux.0
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lease_time = 86400
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access = mac
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allow_simple_dhcp = enable
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@ -18,6 +17,17 @@ set_gateway = true
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; use "nc -l -u 127.0.0.1 -p 12345" to debug
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; notify = 192.168.26.201:12345;192.168.26.200:12345
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[bootfile]
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; BIOS boot file
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default = pxelinux.0
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; EFI Intel x86_84
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00007 = shimx64.efi
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[buggy_clients]
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; list of stupid clients (mostly Intel's) that ignores valid subnet broadcast
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; and require global DHCP offer broadcast
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1C-69-7A-00-6F-4C = yes
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[mac]
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; see doc: byte separator should be defined with dash, not column
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00-AA-55-12-34-56 = enable
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@ -133,7 +133,7 @@ DHCP_OPTIONS = {0: 'Byte padding',
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57: 'Message length',
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58: 'Renewal time',
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59: 'Rebinding time',
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60: 'Class ID',
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60: 'Vendor class identifier',
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61: 'GUID',
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64: 'Network Information Service+ domain',
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65: 'Network Information Service+ servers',
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@ -200,7 +200,8 @@ class BootpServer:
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(ST_IDLE, ST_PXE, ST_DHCP) = range(3) # Current state
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BOOTP_SECTION = 'bootpd'
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BUGGY_CLIENTS_SECTION = 'buggy_clients'
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BOOT_FILE_SECTION = 'bootfile'
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BUGGY_CLIENT_SECTION = 'buggy_clients'
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def __init__(self, logger, config):
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self.sock = []
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@ -252,10 +253,19 @@ class BootpServer:
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self.acl[entry.upper().replace('-', ':')] = \
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to_bool(self.config.get(access, entry))
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self.buggy_clients = set()
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if self.config.options(self.BUGGY_CLIENTS_SECTION):
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for entry in self.config.options(self.BUGGY_CLIENTS_SECTION):
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if to_bool(self.config.get(self.BUGGY_CLIENTS_SECTION, entry)):
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if self.config.options(self.BUGGY_CLIENT_SECTION):
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for entry in self.config.options(self.BUGGY_CLIENT_SECTION):
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if to_bool(self.config.get(self.BUGGY_CLIENT_SECTION, entry)):
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self.buggy_clients.add(entry.upper().replace('-', ':'))
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self.boot_files = dict()
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if not self.config.options(self.BOOT_FILE_SECTION):
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raise BootpError("Mising '%s' section" % self.BOOT_FILE_SECTION)
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for entry in self.config.options(self.BOOT_FILE_SECTION):
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self.boot_files[entry] = self.config.get(self.BOOT_FILE_SECTION,
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entry)
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if 'default' not in self.boot_files:
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raise BootpError("'%s' section should contain at least the default"
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"boot file")
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# pre-fill ippool if specified
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if self.config.has_section('static_dhcp'):
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for mac_str, ip_str in config.items('static_dhcp'):
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@ -316,7 +326,7 @@ class BootpServer:
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iface = self.find_interface(self.config.get(self.BOOTP_SECTION,
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'pool_start'))
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if not iface:
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raise RuntimeError('Unable to retrieve binding interface')
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raise BootpError('Unable to retrieve binding interface')
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if platform == 'linux':
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from socket import SO_BINDTODEVICE
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sock.setsockopt(socket, SOL_SOCKET, SO_BINDTODEVICE, iface)
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@ -324,8 +334,8 @@ class BootpServer:
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IP_BOUND_IF = 25
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sock.setsockopt(IPPROTO_IP, IP_BOUND_IF, if_nametoindex(iface))
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else:
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raise RuntimeError('Bind to interface not supported on %s' %
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platform)
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raise BootpError('Bind to interface not supported on %s' %
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platform)
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self.sock.append(sock)
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self.log.info('Listening to %s:%s' % (host, port))
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sock.bind((host, int(port)))
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@ -576,10 +586,31 @@ class BootpServer:
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for opt in options[55]:
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try:
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parameter = DHCP_OPTIONS[opt]
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self.log.info('Client request: %s', parameter)
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self.log.debug('Client request: %s', parameter)
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except KeyError:
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self.log.warning('Unknown requested option: %d', opt)
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boot_file = self.boot_files['default']
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if 60 in options:
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clientclass = options[60]
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classids = clientclass.split(b':')
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if len(classids) >= 3 and \
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classids[0].lower() == b'pxeclient' and \
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classids[1].lower() == b'arch':
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try:
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architecture = classids[2].decode()
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except UnicodeDecodeError:
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self.log.error('Unable to decode architecture')
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return
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try:
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boot_file = self.boot_files[architecture]
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self.log.info("Selecting bootfile '%s' for architecture "
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"%s", boot_file, architecture)
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except KeyError:
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self.log.error('No boot file defined for architecture %s',
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architecture)
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return
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# construct reply
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buf[BOOTP_HOPS] = 0
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buf[BOOTP_OP] = BOOTREPLY
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@ -629,8 +660,7 @@ class BootpServer:
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self.config.get(self.BOOTP_SECTION,
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'domain', 'localdomain')]).encode()
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# file
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buf[BOOTP_FILE] = self.config.get(self.BOOTP_SECTION,
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'boot_file', '\x00').encode()
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buf[BOOTP_FILE] = boot_file.encode()
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if not dhcp_msg_type:
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self.log.warn('No DHCP message type found, discarding request')
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