Add a new --ssh-cmd= option to let you override the ssh command.

Requested by Axel Beckert.

client.py

@@ -98,7 +98,7 @@ class FirewallClient:
             raise Fatal('cleanup: %r returned %d' % (self.argv, rv))
 
 
-def _main(listener, fw, remotename, python, seed_hosts, auto_nets):
+def _main(listener, fw, ssh_cmd, remotename, python, seed_hosts, auto_nets):
     handlers = []
     if helpers.verbose >= 1:
         helpers.logprefix = 'c : '
@@ -106,7 +106,7 @@ def _main(listener, fw, remotename, python, seed_hosts, auto_nets):
         helpers.logprefix = 'client: '
     debug1('connecting to server...\n')
     try:
-        (serverproc, serversock) = ssh.connect(remotename, python)
+        (serverproc, serversock) = ssh.connect(ssh_cmd, remotename, python)
     except socket.error, e:
         if e.errno == errno.EPIPE:
             raise Fatal("failed to establish ssh session")
@@ -181,7 +181,7 @@ def _main(listener, fw, remotename, python, seed_hosts, auto_nets):
         mux.check_fullness()
 
 
-def main(listenip, remotename, python, seed_hosts, auto_nets,
+def main(listenip, ssh_cmd, remotename, python, seed_hosts, auto_nets,
          subnets_include, subnets_exclude):
     debug1('Starting sshuttle proxy.\n')
     listener = socket.socket()
@@ -212,6 +212,7 @@ def main(listenip, remotename, python, seed_hosts, auto_nets,
     fw = FirewallClient(listenip[1], subnets_include, subnets_exclude)
     
     try:
-        return _main(listener, fw, remotename, python, seed_hosts, auto_nets)
+        return _main(listener, fw, ssh_cmd, remotename,
+                     python, seed_hosts, auto_nets)
     finally:
         fw.done()

main.py

@@ -56,6 +56,7 @@ python= specify the name/path of the python interpreter on the remote server [py
 r,remote=  ssh hostname (and optional username) of remote sshuttle server
 x,exclude= exclude this subnet (can be used more than once)
 v,verbose  increase debug message verbosity
+e,ssh-cmd= the command to use to connect to the remote [ssh]
 seed-hosts= with -H, use these hostnames for initial scan (comma-separated)
 server     (internal use only)
 firewall   (internal use only)
@@ -97,8 +98,9 @@ try:
         else:
             sh = None
         sys.exit(client.main(parse_ipport(opt.listen or '0.0.0.0:0'),
+                             opt.ssh_cmd,
                              remotename,
-                             (opt.python or "python"),
+                             opt.python,
                              sh,
                              opt.auto_nets,
                              parse_subnets(includes),

ssh.py

@@ -21,7 +21,7 @@ def empackage(z, filename):
     return '%s\n%d\n%s' % (basename,len(content), content)
 
 
-def connect(rhostport, python):
+def connect(ssh_cmd, rhostport, python):
     main_exe = sys.argv[0]
     l = (rhostport or '').split(':', 1)
     rhost = l[0]
@@ -53,7 +53,13 @@ def connect(rhostport, python):
     if not rhost:
         argv = [python, '-c', pyscript]
     else:
-        argv = ['ssh'] + portl + [rhost, '--', "'%s' -c '%s'" % (python, pyscript)]
+        if ssh_cmd:
+            sshl = ssh_cmd.split(' ')
+        else:
+            sshl = ['ssh']
+        argv = (sshl + 
+                portl + 
+                [rhost, '--', "'%s' -c '%s'" % (python, pyscript)])
     (s1,s2) = socket.socketpair()
     def setup():
         # runs in the child process