Backward compatibility with Python 3.4 (server)

These changes will allow sshuttle to be used with servers that
have python 3.4 installed (e.g. CentOS 7, Debian 8, Ubuntu 14.04).

sshuttle/assembler.py

@@ -4,7 +4,7 @@ import imp
 
 z = zlib.decompressobj()
 while 1:
-    name = sys.stdin.readline().strip()
+    name = sys.stdin.readline().strip().decode("ASCII")
     if name:
         nbytes = int(sys.stdin.readline())
         if verbosity >= 2:

sshuttle/server.py

@@ -12,7 +12,7 @@ import sshuttle.helpers as helpers
 import sshuttle.hostwatch as hostwatch
 import subprocess as ssubprocess
 from sshuttle.ssnet import Handler, Proxy, Mux, MuxWrapper
-from sshuttle.helpers import log, debug1, debug2, debug3, Fatal, \
+from sshuttle.helpers import b, log, debug1, debug2, debug3, Fatal, \
     resolvconf_random_nameserver
 
 
@@ -61,7 +61,7 @@ def _list_routes():
     p = ssubprocess.Popen(argv, stdout=ssubprocess.PIPE)
     routes = []
     for line in p.stdout:
-        cols = re.split(r'\s+', line)
+        cols = re.split(r'\s+', line.decode("ASCII"))
         ipw = _ipmatch(cols[0])
         if not ipw:
             continue  # some lines won't be parseable; never mind
@@ -246,7 +246,7 @@ def main(latency_control):
     routepkt = ''
     for r in routes:
         routepkt += '%d,%s,%d\n' % r
-    mux.send(0, ssnet.CMD_ROUTES, routepkt)
+    mux.send(0, ssnet.CMD_ROUTES, b(routepkt))
 
     hw = Hostwatch()
     hw.leftover = ''

sshuttle/ssh.py

@@ -89,8 +89,9 @@ def connect(ssh_cmd, rhostport, python, stderr, options):
                 b"\n")
 
     pyscript = r"""
-                import sys;
+                import sys, os;
                 verbosity=%d;
+                sys.stdin = os.fdopen(0, "rb");
                 exec(compile(sys.stdin.read(%d), "assembler.py", "exec"))
                 """ % (helpers.verbose or 0, len(content))
     pyscript = re.sub(r'\s+', ' ', pyscript.strip())