s3-rpc: added "rpc_server:default" config option

this allows the config to specify a default behaviour (embedded,
external or disabled) for unknown pipes. This is needed to allow the
s3 smbd server to redirect unknown pipes to the s4 RPC server when
using s3 smbd as a file server for a s4 DC. If rpc_server:default is
not specified then this change preserves the old behaviour

diff --git a/source3/rpc_server/rpc_config.c b/source3/rpc_server/rpc_config.c
index 3ddc18935db7f50012eed0c9fce48591ccce8332..d3a46ddc612100ba2e3edc4baeb576a945f0228f 100644 (file)
--- a/source3/rpc_server/rpc_config.c
+++ b/source3/rpc_server/rpc_config.c
@@ -54,10 +54,18 @@ enum rpc_service_mode_e rpc_service_mode(const char *name)
                pipe_name = "ntsvcs";
        }
 
-       def = "embedded";
-       for (i = 0; rpc_service_defaults[i].name; i++) {
-               if (strcasecmp_m(pipe_name, rpc_service_defaults[i].name) == 0) {
-                       def = rpc_service_defaults[i].def_mode;
+       def = lp_parm_const_string(GLOBAL_SECTION_SNUM,
+                                  "rpc_server", "default", NULL);
+       if (def == NULL) {
+               for (i = 0; rpc_service_defaults[i].name; i++) {
+                       if (strcasecmp_m(pipe_name, rpc_service_defaults[i].name) == 0) {
+                               def = rpc_service_defaults[i].def_mode;
+                               break;
+                       }
+               }
+               /* if the default is unspecified then use 'embedded' */
+               if (def == NULL) {
+                       def = "embedded";
                }
        }