signal.signal(signal.SIGINT, signal.SIG_DFL)
import sys
+import os
from zope.interface import implementer
from ipaddress import AddressValueError
from optparse import OptionParser
+import configparser
from configparser import ConfigParser
from configparser import NoOptionError
class DBG(twisted.python.constants.Names):
INIT = NamedConstant()
+ CONFIG = NamedConstant()
ROUTE = NamedConstant()
DROP = NamedConstant()
FLOW = NamedConstant()
if event.get('log_level') != LogLevel.info:
return yes
dflag = event.get('dflag')
+ if dflag is False : return yes
if dflag in debug_set: return yes
if dflag is None and DBG.TWISTED in debug_set: return yes
return no
defcfg = '''
[DEFAULT]
-#[<client>] overrides
-max_batch_down = 65536 # used by server, subject to [limits]
-max_queue_time = 10 # used by server, subject to [limits]
-target_requests_outstanding = 3 # must match; subject to [limits] on server
-http_timeout = 30 # used by both } must be
-http_timeout_grace = 5 # used by both } compatible
-max_requests_outstanding = 4 # used by client
-max_batch_up = 4000 # used by client
-http_retry = 5 # used by client
+max_batch_down = 65536
+max_queue_time = 10
+target_requests_outstanding = 3
+http_timeout = 30
+http_timeout_grace = 5
+max_requests_outstanding = 6
+max_batch_up = 4000
+http_retry = 5
+port = 80
+vroutes = ''
#[server] or [<client>] overrides
ipif = userv root ipif %(local)s,%(peer)s,%(mtu)s,slip %(rnets)s
-# extra interpolations: %(local)s %(peer)s %(rnet)s
-# obtained on server [virtual]server [virtual]relay [virtual]network
-# from on client <client> [virtual]server [virtual]routes
-[virtual]
+# relating to virtual network
mtu = 1500
-routes = ''
-# network = <prefix>/<len> # mandatory for server
-# server = <ipaddr> # used by both, default is computed from `network'
-# relay = <ipaddr> # used by server, default from `network' and `server'
-# default server is first host in network
-# default relay is first host which is not server
-
-[server]
-# addrs = 127.0.0.1 ::1 # mandatory for server
-port = 80 # used by server
-# url # used by client; default from first `addrs' and `port'
+
+[SERVER]
+server = SERVER
+# addrs = 127.0.0.1 ::1
+# url
+
+# relating to virtual network
+vvnetwork = 172.24.230.192
+# vnetwork = <prefix>/<len>
+# vadd r = <ipaddr>
+# vrelay = <ipaddr>
+
# [<client-ip4-or-ipv6-address>]
# password = <password> # used by both, must match
-[limits]
-max_batch_down = 262144 # used by server
-max_queue_time = 121 # used by server
-http_timeout = 121 # used by server
-target_requests_outstanding = 10 # used by server
+[LIMIT]
+max_batch_down = 262144
+max_queue_time = 121
+http_timeout = 121
+target_requests_outstanding = 10
'''
# these need to be defined here so that they can be imported by import *
-cfg = ConfigParser()
+cfg = ConfigParser(strict=False)
optparser = OptionParser()
_mimetrans = bytes.maketrans(b'-'+slip.esc, slip.esc+b'-')
return s.translate(_mimetrans)
class ConfigResults:
- def __init__(self, d = { }):
- self.__dict__ = d
+ def __init__(self):
+ pass
def __repr__(self):
return 'ConfigResults('+repr(self.__dict__)+')'
-c = ConfigResults()
-
def log_discard(packet, iface, saddr, daddr, why):
log_debug(DBG.DROP,
'discarded packet [%s] %s -> %s: %s' % (iface, saddr, daddr, why),
#---------- config processing ----------
-def process_cfg_common_always():
- global mtu
- c.mtu = cfg.get('virtual','mtu')
+def _cfg_process_putatives():
+ servers = { }
+ clients = { }
+ # maps from abstract object to canonical name for cs's
+
+ def putative(cmap, abstract, canoncs):
+ try:
+ current_canoncs = cmap[abstract]
+ except KeyError:
+ pass
+ else:
+ assert(current_canoncs == canoncs)
+ cmap[abstract] = canoncs
+
+ server_pat = r'[-.0-9A-Za-z]+'
+ client_pat = r'[.:0-9a-f]+'
+ server_re = regexp.compile(server_pat)
+ serverclient_re = regexp.compile(server_pat + r' ' + client_pat)
+
+ for cs in cfg.sections():
+ if cs == 'LIMIT':
+ # plan A "[LIMIT]"
+ continue
+
+ try:
+ # plan B "[<client>]" part 1
+ ci = ipaddr(cs)
+ except AddressValueError:
+
+ if server_re.fullmatch(cs):
+ # plan C "[<servername>]"
+ putative(servers, cs, cs)
+ continue
+
+ if serverclient_re.fullmatch(cs):
+ # plan D "[<servername> <client>]" part 1
+ (pss,pcs) = cs.split(' ')
+
+ if pcs == 'LIMIT':
+ # plan E "[<servername> LIMIT]"
+ continue
+
+ try:
+ # plan D "[<servername> <client>]" part 2
+ ci = ipaddr(pc)
+ except AddressValueError:
+ # plan F "[<some thing we do not understand>]"
+ # well, we ignore this
+ print('warning: ignoring config section %s' % cs, file=sys.stderr)
+ continue
+
+ else: # no AddressValueError
+ # plan D "[<servername> <client]" part 3
+ putative(clients, ci, pcs)
+ putative(servers, pss, pss)
+ continue
+
+ else: # no AddressValueError
+ # plan B "[<client>" part 2
+ putative(clients, ci, cs)
+ continue
+
+ return (servers, clients)
+
+def cfg_process_common(ss):
+ c.mtu = cfg.getint(ss, 'mtu')
+
+def cfg_process_saddrs(c, ss):
+ class ServerAddr():
+ def __init__(self, port, addrspec):
+ self.port = port
+ # also self.addr
+ try:
+ self.addr = ipaddress.IPv4Address(addrspec)
+ self._endpointfactory = twisted.internet.endpoints.TCP4ServerEndpoint
+ self._inurl = b'%s'
+ except AddressValueError:
+ self.addr = ipaddress.IPv6Address(addrspec)
+ self._endpointfactory = twisted.internet.endpoints.TCP6ServerEndpoint
+ self._inurl = b'[%s]'
+ def make_endpoint(self):
+ return self._endpointfactory(reactor, self.port, self.addr)
+ def url(self):
+ url = b'http://' + (self._inurl % str(self.addr).encode('ascii'))
+ if self.port != 80: url += b':%d' % self.port
+ url += b'/'
+ return url
+
+ c.port = cfg.getint(ss,'port')
+ c.saddrs = [ ]
+ for addrspec in cfg.get(ss, 'addrs').split():
+ sa = ServerAddr(c.port, addrspec)
+ c.saddrs.append(sa)
+
+def cfg_process_vnetwork(c, ss):
+ c.vnetwork = ipnetwork(cfg.get(ss,'vnetwork'))
+ if c.vnetwork.num_addresses < 3 + 2:
+ raise ValueError('vnetwork needs at least 2^3 addresses')
+
+def cfg_process_vaddr(c, ss):
+ try:
+ c.vaddr = cfg.get(ss,'vaddr')
+ except NoOptionError:
+ cfg_process_vnetwork(c, ss)
+ c.vaddr = next(c.vnetwork.hosts())
+
+def cfg_search_section(key,sections):
+ for section in sections:
+ if cfg.has_option(section, key):
+ return section
+ raise NoOptionError(key, repr(sections))
+
+def cfg_search(getter,key,sections):
+ section = cfg_search_section(key,sections)
+ return getter(section, key)
+
+def cfg_process_client_limited(cc,ss,sections,key):
+ val = cfg_search(cfg.getint, key, sections)
+ lim = cfg_search(cfg.getint, key, ['%s LIMIT' % ss, 'LIMIT'])
+ cc.__dict__[key] = min(val,lim)
+
+def cfg_process_client_common(cc,ss,cs,ci):
+ # returns sections to search in, iff password is defined, otherwise None
+ cc.ci = ci
+
+ sections = ['%s %s' % (ss,cs),
+ cs,
+ ss,
+ 'DEFAULT']
+
+ try: pwsection = cfg_search_section('password', sections)
+ except NoOptionError: return None
+
+ pw = cfg.get(pwsection, 'password')
+ cc.password = pw.encode('utf-8')
+
+ cfg_process_client_limited(cc,ss,sections,'target_requests_outstanding')
+ cfg_process_client_limited(cc,ss,sections,'http_timeout')
-def process_cfg_ipif(section, varmap):
+ return sections
+
+def cfg_process_ipif(c, sections, varmap):
for d, s in varmap:
try: v = getattr(c, s)
except AttributeError: continue
setattr(c, d, v)
- #print(repr(c))
+ #print('CFGIPIF',repr((varmap, sections, c.__dict__)),file=sys.stderr)
+ section = cfg_search_section('ipif', sections)
c.ipif_command = cfg.get(section,'ipif', vars=c.__dict__)
-def process_cfg_network():
- c.network = ipnetwork(cfg.get('virtual','network'))
- if c.network.num_addresses < 3 + 2:
- raise ValueError('network needs at least 2^3 addresses')
+#---------- startup ----------
-def process_cfg_server():
- try:
- c.server = cfg.get('virtual','server')
- except NoOptionError:
- process_cfg_network()
- c.server = next(c.network.hosts())
+def common_startup(process_cfg):
+ # calls process_cfg(putative_clients, putative_servers)
-class ServerAddr():
- def __init__(self, port, addrspec):
- self.port = port
- # also self.addr
- try:
- self.addr = ipaddress.IPv4Address(addrspec)
- self._endpointfactory = twisted.internet.endpoints.TCP4ServerEndpoint
- self._inurl = b'%s'
- except AddressValueError:
- self.addr = ipaddress.IPv6Address(addrspec)
- self._endpointfactory = twisted.internet.endpoints.TCP6ServerEndpoint
- self._inurl = b'[%s]'
- def make_endpoint(self):
- return self._endpointfactory(reactor, self.port, self.addr)
- def url(self):
- url = b'http://' + (self._inurl % str(self.addr).encode('ascii'))
- if self.port != 80: url += b':%d' % self.port
- url += b'/'
- return url
-
-def process_cfg_saddrs():
- try: port = cfg.getint('server','port')
- except NoOptionError: port = 80
+ # ConfigParser hates #-comments after values
+ trailingcomments_re = regexp.compile(r'#.*')
+ cfg.read_string(trailingcomments_re.sub('', defcfg))
+ need_defcfg = True
- c.saddrs = [ ]
- for addrspec in cfg.get('server','addrs').split():
- sa = ServerAddr(port, addrspec)
- c.saddrs.append(sa)
+ def readconfig(pathname, mandatory=True):
+ def log(m, p=pathname):
+ if not DBG.CONFIG in debug_set: return
+ print('DBG.CONFIG: %s: %s' % (m, pathname))
-def process_cfg_clients(constructor):
- c.clients = [ ]
- for cs in cfg.sections():
- if not (':' in cs or '.' in cs): continue
- ci = ipaddr(cs)
- pw = cfg.get(cs, 'password')
- pw = pw.encode('utf-8')
- constructor(ci,cs,pw)
+ try:
+ files = os.listdir(pathname)
-#---------- startup ----------
+ except FileNotFoundError:
+ if mandatory: raise
+ log('skipped')
+ return
-def common_startup():
- optparser.add_option('-c', '--config', dest='configfile',
- default='/etc/hippotat/config')
+ except NotADirectoryError:
+ cfg.read(pathname)
+ log('read file')
+ return
+
+ # is a directory
+ log('directory')
+ re = regexp.compile('[^-A-Za-z0-9_]')
+ for f in os.listdir(cdir):
+ if re.search(f): continue
+ subpath = pathname + '/' + f
+ try:
+ os.stat(subpath)
+ except FileNotFoundError:
+ log('entry skipped', subpath)
+ continue
+ cfg.read(subpath)
+ log('entry read', subpath)
+
+ def oc_config(od,os, value, op):
+ nonlocal need_defcfg
+ need_defcfg = False
+ readconfig(value)
def dfs_less_detailed(dl):
return [df for df in DBG.iterconstants() if df <= dl]
action='callback',
callback= ds_select)
+ optparser.add_option('-c', '--config',
+ nargs=1,
+ type='string',
+ metavar='CONFIGFILE',
+ dest='configfile',
+ action='callback',
+ callback= oc_config)
+
(opts, args) = optparser.parse_args()
if len(args): optparser.error('no non-option arguments please')
- print(repr(debug_set), file=sys.stderr)
+ if need_defcfg:
+ readconfig('/etc/hippotat/config', False)
+ readconfig('/etc/hippotat/config.d', False)
- re = regexp.compile('#.*')
- cfg.read_string(re.sub('', defcfg))
- cfg.read(opts.configfile)
+ try:
+ (pss, pcs) = _cfg_process_putatives()
+ process_cfg(pss, pcs)
+ except (configparser.Error, ValueError):
+ traceback.print_exc(file=sys.stderr)
+ print('\nInvalid configuration, giving up.', file=sys.stderr)
+ sys.exit(12)
+
+ #print(repr(debug_set), file=sys.stderr)
log_formatter = twisted.logger.formatEventAsClassicLogText
stdout_obs = twisted.logger.FileLogObserver(sys.stdout, log_formatter)
~ian / hippotat.git / blobdiff