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Add .gitignore .vscode/ path. Resolve the issue #374 adding tproxy mark option to allow different network mapping.

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Signed-off-by: Samuel Bernardo <samuel@lip.pt>
This commit is contained in:
Samuel Bernardo 2020-12-06 17:23:15 +00:00 committed by Brian May
parent a5214e0fd7
commit 76b8b83e22
7 changed files with 37 additions and 15 deletions
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1
.gitignore vendored
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@ -15,3 +15,4 @@
/.redo
/.pytest_cache/
/.python-version
.vscode/

4
docs/manpage.rst
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@ -274,6 +274,10 @@ Options
Set the file name for the sudoers.d file to be added. Default is
"sshuttle_auto". Only works with --sudoers.
.. option:: -t, --tmark
Transproxy optional traffic mark with provided MARK value.
.. option:: --version
Print program version.

6
docs/tproxy.rst
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@ -8,9 +8,11 @@ There are some things you need to consider for TPROXY to work:
done once after booting up::
ip route add local default dev lo table 100
ip rule add fwmark 1 lookup 100
ip rule add fwmark {TMARK} lookup 100
ip -6 route add local default dev lo table 100
ip -6 rule add fwmark 1 lookup 100
ip -6 rule add fwmark {TMARK} lookup 100
where {TMARK} is the identifier mark passed with -t or --tmark flag (default value is 1).
- The ``--auto-nets`` feature does not detect IPv6 routes automatically. Add IPv6
routes manually. e.g. by adding ``'::/0'`` to the end of the command line.

7
sshuttle/client.py
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@ -248,7 +248,7 @@ class FirewallClient:
def setup(self, subnets_include, subnets_exclude, nslist,
redirectport_v6, redirectport_v4, dnsport_v6, dnsport_v4, udp,
user):
user, tmark):
self.subnets_include = subnets_include
self.subnets_exclude = subnets_exclude
self.nslist = nslist
@ -258,6 +258,7 @@ class FirewallClient:
self.dnsport_v4 = dnsport_v4
self.udp = udp
self.user = user
self.tmark = tmark
def check(self):
rv = self.p.poll()
@ -576,7 +577,7 @@ def main(listenip_v6, listenip_v4,
ssh_cmd, remotename, python, latency_control, dns, nslist,
method_name, seed_hosts, auto_hosts, auto_nets,
subnets_include, subnets_exclude, daemon, to_nameserver, pidfile,
user, sudo_pythonpath):
user, sudo_pythonpath, tmark):
if not remotename:
print("WARNING: You must specify -r/--remote to securely route "
@ -902,7 +903,7 @@ def main(listenip_v6, listenip_v4,
# start the firewall
fw.setup(subnets_include, subnets_exclude, nslist,
redirectport_v6, redirectport_v4, dnsport_v6, dnsport_v4,
required.udp, user)
required.udp, user, tmark)
# start the client process
try:

3
sshuttle/cmdline.py
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@ -107,7 +107,8 @@ def main():
opt.to_ns,
opt.pidfile,
opt.user,
opt.sudo_pythonpath)
opt.sudo_pythonpath,
opt.tmark)
if return_code == 0:
log('Normal exit code, exiting...')

23
sshuttle/methods/tproxy.py
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@ -152,6 +152,11 @@ class Method(BaseMethod):
def setup_firewall(self, port, dnsport, nslist, family, subnets, udp,
user):
self.setup_firewall_tproxy(port, dnsport, nslist, family, subnets, udp,
user, self.firewall.tmark)
def setup_firewall_tproxy(self, port, dnsport, nslist, family, subnets, udp,
user, tmark):
if family not in [socket.AF_INET, socket.AF_INET6]:
raise Exception(
'Address family "%s" unsupported by tproxy method'
@ -182,9 +187,9 @@ class Method(BaseMethod):
_ipt('-F', divert_chain)
_ipt('-N', tproxy_chain)
_ipt('-F', tproxy_chain)
_ipt('-I', 'OUTPUT', '1', '-j', mark_chain)
_ipt('-I', 'PREROUTING', '1', '-j', tproxy_chain)
_ipt('-A', divert_chain, '-j', 'MARK', '--set-mark', '1')
_ipt('-I', 'OUTPUT', tmark, '-j', mark_chain)
_ipt('-I', 'PREROUTING', tmark, '-j', tproxy_chain)
_ipt('-A', divert_chain, '-j', 'MARK', '--set-mark', tmark)
_ipt('-A', divert_chain, '-j', 'ACCEPT')
_ipt('-A', tproxy_chain, '-m', 'socket', '-j', divert_chain,
'-m', 'tcp', '-p', 'tcp')
@ -194,11 +199,11 @@ class Method(BaseMethod):
'-m', 'udp', '-p', 'udp')
for _, ip in [i for i in nslist if i[0] == family]:
_ipt('-A', mark_chain, '-j', 'MARK', '--set-mark', '1',
_ipt('-A', mark_chain, '-j', 'MARK', '--set-mark', tmark,
'--dest', '%s/32' % ip,
'-m', 'udp', '-p', 'udp', '--dport', '53')
_ipt('-A', tproxy_chain, '-j', 'TPROXY',
'--tproxy-mark', '0x1/0x1',
'--tproxy-mark', '0x'+tmark+'/0x'+tmark,
'--dest', '%s/32' % ip,
'-m', 'udp', '-p', 'udp', '--dport', '53',
'--on-port', str(dnsport))
@ -218,12 +223,12 @@ class Method(BaseMethod):
'-m', 'tcp',
*tcp_ports)
else:
_ipt('-A', mark_chain, '-j', 'MARK', '--set-mark', '1',
_ipt('-A', mark_chain, '-j', 'MARK', '--set-mark', tmark,
'--dest', '%s/%s' % (snet, swidth),
'-m', 'tcp',
*tcp_ports)
_ipt('-A', tproxy_chain, '-j', 'TPROXY',
'--tproxy-mark', '0x1/0x1',
'--tproxy-mark', '0x'+tmark+'/0x'+tmark,
'--dest', '%s/%s' % (snet, swidth),
'-m', 'tcp',
*(tcp_ports + ('--on-port', str(port))))
@ -242,12 +247,12 @@ class Method(BaseMethod):
'-m', 'udp',
*udp_ports)
else:
_ipt('-A', mark_chain, '-j', 'MARK', '--set-mark', '1',
_ipt('-A', mark_chain, '-j', 'MARK', '--set-mark', tmark,
'--dest', '%s/%s' % (snet, swidth),
'-m', 'udp',
*udp_ports)
_ipt('-A', tproxy_chain, '-j', 'TPROXY',
'--tproxy-mark', '0x1/0x1',
'--tproxy-mark', '0x'+tmark+'/0x'+tmark,
'--dest', '%s/%s' % (snet, swidth),
'-m', 'udp',
*(udp_ports + ('--on-port', str(port))))

8
sshuttle/options.py
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@ -409,3 +409,11 @@ parser.add_argument(
do not set PYTHONPATH when invoking sudo
"""
)
parser.add_argument(
"-t", "--tmark",
metavar="[MARK]",
deafult="1",
help="""
transproxy optional traffic mark with provided MARK value
"""
)