Place the options in the environment after processing them properly.

src/or/config.c

@@ -4671,6 +4671,26 @@ get_transport_bindaddr_from_config(const char *transport)
   return NULL;
 }
 
+/** Given the name of a pluggable transport in <b>transport</b>, check
+ *  the configuration file to see if the user has asked us to pass any
+ *  parameters to the pluggable transport. Return a smartlist
+ *  containing the parameters, otherwise NULL. */
+smartlist_t *
+get_options_for_server_transport(const char *transport)
+{
+  config_line_t *cl;
+  const or_options_t *options = get_options();
+
+  for (cl = options->ServerTransportOptions; cl; cl = cl->next) {
+    smartlist_t *options_sl =
+      get_options_from_transport_options_line(cl->value, transport);
+    if (options_sl)
+      return options_sl;
+  }
+
+  return NULL;
+}
+
 /** Read the contents of a ServerTransportPlugin line from
  * <b>line</b>. Return 0 if the line is well-formed, and -1 if it
  * isn't.

src/or/config.h

@@ -114,7 +114,7 @@ void bridge_line_free(bridge_line_t *bridge_line);
 bridge_line_t *parse_bridge_line(const char *line);
 smartlist_t *get_options_from_transport_options_line(const char *line,
                                                      const char *transport);
-
+smartlist_t *get_options_for_server_transport(const char *transport);
 
 #endif
 

src/or/transports.c

@@ -1100,6 +1100,48 @@ parse_cmethod_line(const char *line, managed_proxy_t *mp)
   return r;
 }
 
+/** Return a newly allocated string that tor should place in
+ * TOR_PT_SERVER_TRANSPORT_OPTIONS while configuring the server
+ * manged proxy in <b>mp</b>. Return NULL if no such options are found. */
+static char *
+get_transport_options_for_server_proxy(const managed_proxy_t *mp)
+{
+  char *options_string = NULL;
+  smartlist_t *string_sl = smartlist_new();
+
+  tor_assert(mp->is_server);
+
+  /** Loop over the transports of the proxy. If we have options for
+      any of them, format them appropriately and place them in our
+      smartlist. Finally, join our smartlist to get the final
+      string. */
+  SMARTLIST_FOREACH_BEGIN(mp->transports_to_launch, const char *, transport) {
+    smartlist_t *options_tmp_sl = NULL;
+    options_tmp_sl = get_options_for_server_transport(transport);
+    if (!options_tmp_sl)
+      continue;
+
+    /** Loop over the options of this transport, escape them, and
+        place them in the smartlist. */
+    SMARTLIST_FOREACH_BEGIN(options_tmp_sl, const char *, options) {
+      char *escaped_opts = tor_escape_str_for_pt_args(options, ":;\\");
+      smartlist_add_asprintf(string_sl, "%s:%s",
+                             transport, escaped_opts);
+      tor_free(escaped_opts);
+    } SMARTLIST_FOREACH_END(options);
+
+    SMARTLIST_FOREACH(options_tmp_sl, char *, c, tor_free(c));
+    smartlist_free(options_tmp_sl);
+  } SMARTLIST_FOREACH_END(transport);
+
+  options_string = smartlist_join_strings(string_sl, ";", 0, NULL);
+
+  SMARTLIST_FOREACH(string_sl, char *, t, tor_free(t));
+  smartlist_free(string_sl);
+
+  return options_string;
+}
+
 /** Return the string that tor should place in TOR_PT_SERVER_BINDADDR
  *  while configuring the server managed proxy in <b>mp</b>. The
  *  string is stored in the heap, and it's the the responsibility of
@@ -1181,6 +1223,14 @@ create_managed_proxy_environment(const managed_proxy_t *mp)
       tor_free(bindaddr_tmp);
     }
 
+    {
+      char *server_transport_options =
+        get_transport_options_for_server_proxy(mp);
+      smartlist_add_asprintf(envs, "TOR_PT_SERVER_TRANSPORT_OPTIONS=%s",
+                             server_transport_options);
+      tor_free(server_transport_options);
+    }
+
     /* XXX024 Remove the '=' here once versions of obfsproxy which
      * assert that this env var exists are sufficiently dead.
      *