From: Zooko O'Whielacronx Date: Mon, 16 Apr 2007 21:59:13 +0000 (-0700) Subject: port iputil to Windows (and Irix, and NetBSD, and Solaris 2, ...) X-Git-Url: https://git.rkrishnan.org/pf/content/en/service/module-simplejson-index.html?a=commitdiff_plain;h=ac4d23d336048cb7d5ee741add9e110fda6a2c6b;p=tahoe-lafs%2Ftahoe-lafs.git port iputil to Windows (and Irix, and NetBSD, and Solaris 2, ...) --- diff --git a/src/allmydata/util/iputil.py b/src/allmydata/util/iputil.py index 83791416..a0bb274c 100644 --- a/src/allmydata/util/iputil.py +++ b/src/allmydata/util/iputil.py @@ -1,111 +1,41 @@ +# portions extracted from ipaddresslib by Autonomous Zone Industries, LGPL (author: Greg Smith) +# portions adapted from nattraverso.ipdiscover +# portions authored by Brian Warner, working for Allmydata +# most recent version authored by Zooko O'Whielacronx, working for Allmydata -# adapted from nattraverso.ipdiscover +# from the Python Standard Library +import re, socket, sys -import subprocess -import re -import socket -from cStringIO import StringIO +# from Twisted +from twisted.internet import defer +from twisted.python import log from twisted.internet import reactor from twisted.internet.protocol import DatagramProtocol from twisted.internet.utils import getProcessOutput +from twisted.python.procutils import which -from fcntl import ioctl -import struct -SIOCGIFADDR = 0x8915 # linux-specific - -# inspired by scapy -def get_if_list(): - f = open("/proc/net/dev","r") - f.readline(); f.readline() - names = [] - for l in f.readlines(): - names.append(l[:l.index(":")].strip()) - return names +def get_local_addresses_async(target='A.ROOT-SERVERS.NET'): + """ + Return a Deferred that fires with a list of IPv4 addresses (as dotted-quad + strings) that are currently configured on this host. -def get_if_addr(ifname): - try: - s=socket.socket() - ifreq = ioctl(s, SIOCGIFADDR, struct.pack("16s16x", ifname)) - s.close() - naddr = ifreq[20:24] - return socket.inet_ntoa(naddr) - except IOError: - return None - -def get_local_addresses(): - """Return a list of IPv4 addresses (as dotted-quad strings) that are - currently configured on this host. - - This will only work under linux, because it uses both a linux-specific - /proc/net/dev devices (to get the interface names) and a SIOCGIFADDR - ioctl (to get their addresses). If the listing-the-interfaces were done - with an ioctl too (and if if you're lucky enough to be using the same - value for the ioctls), then it might work on other forms of unix too. - Windows is right out.""" - - ifnames = [] - for ifname in get_if_list(): - addr = get_if_addr(ifname) - if addr: - ifnames.append(addr) - return ifnames - -def get_local_addresses_sync(): - """Return a list of IPv4 addresses (as dotted-quad strings) that are - currently configured on this host. - - Unfortunately this is not compatible with Twisted: it catches SIGCHLD and - this usually results in errors about 'Interrupted system call'. - - This will probably work on both linux and OS-X, but probably not windows. + @param target: we want to learn an IP address they could try using to + connect to us; The default value is fine, but it might help if you + pass the address of a host that you are actually trying to be + reachable to. """ - # eventually I want to use somebody else's cross-platform library for - # this. For right now, I'm running ifconfig and grepping for the 'inet ' - # lines. - - cmd = "/sbin/ifconfig" - #p = os.popen(cmd) - c = subprocess.Popen(["ifconfig"], stdout=subprocess.PIPE) - output = c.communicate()[0] - p = StringIO(output) addresses = [] - for line in p.readlines(): - # linux shows: " inet addr:1.2.3.4 Bcast:1.2.3.255..." - # OS-X shows: " inet 1.2.3.4 ..." - m = re.match("^\s+inet\s+[a-z:]*([\d\.]+)\s", line) - if m: - addresses.append(m.group(1)) - return addresses - -def get_local_addresses_async(): - """Return a Deferred that fires with a list of IPv4 addresses (as - dotted-quad strings) that are currently configured on this host. - - This will probably work on both linux and OS-X, but probably not windows. - """ - # eventually I want to use somebody else's cross-platform library for - # this. For right now, I'm running ifconfig and grepping for the 'inet ' - # lines. + addresses.append(get_local_ip_for(target)) - # I'd love to do this synchronously. - cmd = "/sbin/ifconfig" - d = getProcessOutput(cmd) - def _parse(output): - addresses = [] - for line in StringIO(output).readlines(): - # linux shows: " inet addr:1.2.3.4 Bcast:1.2.3.255..." - # OS-X shows: " inet 1.2.3.4 ..." - m = re.match("^\s+inet\s+[a-z:]*([\d\.]+)\s", line) - if m: - addresses.append(m.group(1)) + d = _find_addresses_via_config() + def _collect(res): + addresses.extend(res) return addresses - def _fallback(f): - return ["127.0.0.1", get_local_ip_for()] - d.addCallbacks(_parse, _fallback) - return d + d.addCallback(_collect) + return d -def get_local_ip_for(target='A.ROOT-SERVERS.NET'): +def get_local_ip_for(target): """Find out what our IP address is for use by a given target. Returns a string that holds the IP address which could be used by @@ -122,3 +52,89 @@ def get_local_ip_for(target='A.ROOT-SERVERS.NET'): port.stopListening() # note, this returns a Deferred return localip +# k: result of sys.platform, v: which kind of IP configuration reader we use +_platform_map = { + "linux-i386": "linux", # redhat + "linux-ppc": "linux", # redhat + "linux2": "linux", # debian + "win32": "win32", + "irix6-n32": "irix", + "irix6-n64": "irix", + "irix6": "irix", + "openbsd2": "bsd", + "darwin": "bsd", # Mac OS X + "freebsd4": "bsd", + "freebsd5": "bsd", + "netbsd1": "bsd", + "sunos5": "sunos", + "cygwin": "cygwin", + } + +class UnsupportedPlatformError(Exception): + pass + +# Wow, I'm really amazed at home much mileage we've gotten out of calling +# the external route.exe program on windows... It appears to work on all +# versions so far. Still, the real system calls would much be preferred... +# ... thus wrote Greg Smith in time immemorial... +_win32_path = 'route.exe' +_win32_args = ('print',) +_win32_re = re.compile('^\s*0\.0\.0\.0\s.+\s(?P
\d+\.\d+\.\d+\.\d+)\s+(?P\d+)\s*$', flags=re.M|re.I|re.S) + +# These work in Redhat 6.x and Debian 2.2 potato +_linux_path = '/sbin/ifconfig' +_linux_re = re.compile('^(?P\w+)\s.+\sinet addr:(?P
\d+\.\d+\.\d+\.\d+)\s.+$', flags=re.M|re.I|re.S) + +# NetBSD 1.4 (submitted by Rhialto), Darwin, Mac OS X +_netbsd_path = '/sbin/ifconfig -a' +_netbsd_re = re.compile('^\s+inet (?P
\d+\.\d+\.\d+\.\d+)\s.+$', flags=re.M|re.I|re.S) + +# Irix 6.5 +_irix_path = '/usr/etc/ifconfig -a' + +# Solaris 2.x +_sunos_path = '/usr/sbin/ifconfig -a' + +def _find_addresses_via_config(): + # originally by Greg Smith, hacked by Zooko to conform to Brian's API + + platform = _platform_map.get(sys.platform) + if not platform: + raise UnsupportedPlatformError(sys.platform) + + if platform in ('win32', 'cygwin',): + l = [] + for executable in which(_win32_path): + l.append(_query(executable, _win32_re, _win32_args)) + dl = defer.DeferredList(l) + def _gather_results(res): + addresses = [] + for r in res: + if r[0]: + addresses.extend(r[1]) + return addresses + dl.addCallback(_gather_results) + return dl + elif platform == 'linux': + return _query(_linux_path, _linux_re) + elif platform == 'bsd': + return _query(_netbsd_path, _netbsd_re) + elif platform == 'irix' : + return _query(_irix_path, _netbsd_re) + elif platform == 'sunos': + return _query(_sunos_path, _netbsd_re) + +def _query(path, regex, args=()): + d = getProcessOutput(path, args) + def _parse(output): + addresses = [] + outputsplit = output.split('\n') + for output in outputsplit: + m = regex.match(output) + if m: + d = m.groupdict() + addresses.append(d['address']) + + return addresses + d.addCallback(_parse) + return d