added a basic dcerpc endpoint mapper to Samba4. Currently only

implements the epm_Lookup() call, I'll add the other important calls
soon. I was rather pleased to find that epm_Lookup() worked first
time, which is particularly surprising given its complexity.

This required quite a bit of new infrastructure:

  * a generic way of handling dcerpc policy handles in the rpc server

  * added type checked varients of talloc. These are much less error
    prone. I'd like to move to using these for nearly all uses of
    talloc.

  * added more dcerpc fault handling code, and translation from
    NTSTATUS to a dcerpc fault code

  * added data_blob_talloc_zero() for allocating an initially zero
    blob

  * added a endpoint enumeration hook in the dcerpc endpoint server
    operations
(This used to be commit 3f85f9b782dc17417baf1ca557fcae22f5b6a83a)

2 files changed, 9 insertions, 8 deletions

diff --git a/source4/librpc/idl/dcerpc.idl b/source4/librpc/idl/dcerpc.idl
index e6b59c2e2d..afe4b3003f 100644
--- a/source4/librpc/idl/dcerpc.idl
+++ b/source4/librpc/idl/dcerpc.idl
@@ -82,9 +82,10 @@ interface dcerpc
 	} dcerpc_response;
 
 
-	const int DCERPC_FAULT_OP_RNG_ERROR = 0x1c010002;
-	const int DCERPC_FAULT_NDR          = 0x000006f7;
-	const int DCERPC_FAULT_OTHER        = 0x00000001;
+	const int DCERPC_FAULT_OP_RNG_ERROR       = 0x1c010002;
+	const int DCERPC_FAULT_NDR                = 0x000006f7;
+	const int DCERPC_FAULT_CONTEXT_MISMATCH   = 0x1c00001a;
+	const int DCERPC_FAULT_OTHER              = 0x00000001;
 
 	/* we return this fault when we haven't yet run the test
 	   to see what fault w2k3 returns in this case */
diff --git a/source4/librpc/rpc/dcerpc_util.c b/source4/librpc/rpc/dcerpc_util.c
index ef4af9f661..de46f532c6 100644
--- a/source4/librpc/rpc/dcerpc_util.c
+++ b/source4/librpc/rpc/dcerpc_util.c
@@ -96,28 +96,28 @@ NTSTATUS dcerpc_epm_map_tcp_port(const char *server,
 	twr.towers.floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
 	GUID_from_string(uuid, &twr.towers.floors[0].lhs.info.uuid.uuid);
 	twr.towers.floors[0].lhs.info.uuid.version = version;
-	twr.towers.floors[0].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
+	twr.towers.floors[0].rhs.rhs_data = data_blob_talloc_zero(p->mem_ctx, 2);
 
 	/* encoded with NDR ... */
 	twr.towers.floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
 	GUID_from_string(NDR_GUID, &twr.towers.floors[1].lhs.info.uuid.uuid);
 	twr.towers.floors[1].lhs.info.uuid.version = NDR_GUID_VERSION;
-	twr.towers.floors[1].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
+	twr.towers.floors[1].rhs.rhs_data = data_blob_talloc_zero(p->mem_ctx, 2);
 
 	/* on an RPC connection ... */
 	twr.towers.floors[2].lhs.protocol = EPM_PROTOCOL_RPC_C;
 	twr.towers.floors[2].lhs.info.lhs_data = data_blob(NULL, 0);
-	twr.towers.floors[2].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
+	twr.towers.floors[2].rhs.rhs_data = data_blob_talloc_zero(p->mem_ctx, 2);
 
 	/* on a TCP port ... */
 	twr.towers.floors[3].lhs.protocol = EPM_PROTOCOL_TCP;
 	twr.towers.floors[3].lhs.info.lhs_data = data_blob(NULL, 0);
-	twr.towers.floors[3].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
+	twr.towers.floors[3].rhs.rhs_data = data_blob_talloc_zero(p->mem_ctx, 2);
 
 	/* on an IP link ... */
 	twr.towers.floors[4].lhs.protocol = EPM_PROTOCOL_IP;
 	twr.towers.floors[4].lhs.info.lhs_data = data_blob(NULL, 0);
-	twr.towers.floors[4].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 4);
+	twr.towers.floors[4].rhs.rhs_data = data_blob_talloc_zero(p->mem_ctx, 4);
 
 	/* with some nice pretty paper around it of course */
 	r.in.object = &guid;