Import DCOM improvements.

1 files changed, 433 insertions, 141 deletions

diff --git a/source4/lib/com/dcom/main.c b/source4/lib/com/dcom/main.c
index 14a7287c59..01efb68c05 100644
--- a/source4/lib/com/dcom/main.c
+++ b/source4/lib/com/dcom/main.c
@@ -2,6 +2,7 @@
    Unix SMB/CIFS implementation.
    Main DCOM functionality
    Copyright (C) 2004 Jelmer Vernooij <jelmer@samba.org>
+   Copyright (C) 2006 Andrzej Hajda <andrzej.hajda@wp.pl>
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -23,19 +24,15 @@
 #include "librpc/gen_ndr/epmapper.h"
 #include "librpc/gen_ndr/ndr_remact_c.h"
 #include "librpc/gen_ndr/com_dcom.h"
+#include "librpc/gen_ndr/dcom.h"
 #include "lib/com/dcom/dcom.h"
-#include "librpc/rpc/dcerpc_table.h"
+#include "librpc/ndr/ndr_table.h"
+#include "lib/util/dlinklist.h"
+#include "auth/credentials/credentials.h"
+#include "libcli/composite/composite.h"
 
 #define DCOM_NEGOTIATED_PROTOCOLS { EPM_PROTOCOL_TCP, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NCALRPC }
 
-struct dcom_client_context *dcom_client_init(struct com_context *ctx, struct cli_credentials *credentials)
-{
-	ctx->dcom = talloc(ctx, struct dcom_client_context);
-	ctx->dcom->credentials = credentials;
-
-	return ctx->dcom;
-}
-
 static NTSTATUS dcerpc_binding_from_STRINGBINDING(TALLOC_CTX *mem_ctx, struct dcerpc_binding **b_out, struct STRINGBINDING *bd)
 {
 	char *host, *endpoint;
@@ -50,6 +47,7 @@ static NTSTATUS dcerpc_binding_from_STRINGBINDING(TALLOC_CTX *mem_ctx, struct dc
 
 	if (b->transport == -1) {
 		DEBUG(1, ("Can't find transport match endpoint protocol %d\n", bd->wTowerId));
+		talloc_free(b);
 		return NT_STATUS_NOT_SUPPORTED;
 	}
 
@@ -70,49 +68,124 @@ static NTSTATUS dcerpc_binding_from_STRINGBINDING(TALLOC_CTX *mem_ctx, struct dc
 	return NT_STATUS_OK;
 }
 
+struct cli_credentials *dcom_get_server_credentials(struct com_context *ctx, const char *server)
+{
+	struct dcom_server_credentials *c;
+	struct cli_credentials *d;
+
+	d = NULL;
+	for (c = ctx->dcom->credentials; c; c = c->next) {
+		if (c->server == NULL) {
+			d = c->credentials;
+			continue;
+		}
+		if (server && !strcmp(c->server, server)) return c->credentials;
+	}
+	return d;
+}
+
+void dcom_set_server_credentials(struct com_context *ctx, const char *server, struct cli_credentials *credentials)
+{
+	struct dcom_server_credentials *c;
+
+	for (c = ctx->dcom->credentials; c; c = c->next) {
+		if ((server == NULL && c->server == NULL) ||(server && c->server && !strcmp(c->server, server))) {
+			if (c->credentials && c->credentials != credentials) {
+				talloc_unlink(c, c->credentials);
+				c->credentials = credentials;
+				if (talloc_find_parent_bytype(c->credentials, struct dcom_server_credentials))
+					(void)talloc_reference(c, c->credentials);
+				else
+					talloc_steal(c, c->credentials);
+			}
+			return;
+		}
+	}
+	c = talloc(ctx->event_ctx, struct dcom_server_credentials);
+	c->server = talloc_strdup(c, server);
+	c->credentials = credentials;
+	if (talloc_find_parent_bytype(c->credentials, struct dcom_server_credentials))
+		(void)talloc_reference(c, c->credentials);
+	else
+		talloc_steal(c, c->credentials);
+	DLIST_ADD(ctx->dcom->credentials, c);
+}
+
+void dcom_update_credentials_for_aliases(struct com_context *ctx, const char *server, struct DUALSTRINGARRAY *pds)
+{
+	struct cli_credentials *cc;
+	struct dcerpc_binding *b;
+	uint32_t i;
+	NTSTATUS status;
+
+	cc = dcom_get_server_credentials(ctx, server);
+        for (i = 0; pds->stringbindings[i]; ++i) {
+                if (pds->stringbindings[i]->wTowerId != EPM_PROTOCOL_TCP) continue;
+                status = dcerpc_binding_from_STRINGBINDING(ctx, &b, pds->stringbindings[i]);
+		if (!NT_STATUS_IS_OK(status)) continue;
+		dcom_set_server_credentials(ctx, b->host, cc);
+		talloc_free(b);
+	}
+}
+
+struct dcom_client_context *dcom_client_init(struct com_context *ctx, struct cli_credentials *credentials)
+{
+	ctx->dcom = talloc_zero(ctx, struct dcom_client_context);
+	if (!credentials) {
+                credentials = cli_credentials_init(ctx);
+                cli_credentials_set_conf(credentials, ctx->lp_ctx);
+                cli_credentials_parse_string(credentials, "%", CRED_SPECIFIED);
+	}
+	dcom_set_server_credentials(ctx, NULL, credentials);
+	return ctx->dcom;
+}
+
 static NTSTATUS dcom_connect_host(struct com_context *ctx, struct dcerpc_pipe **p, const char *server)
 {
 	struct dcerpc_binding *bd;
 	const char * available_transports[] = { "ncacn_ip_tcp", "ncacn_np" };
 	int i;
 	NTSTATUS status;
-	TALLOC_CTX *mem_ctx = talloc_init("dcom_connect");
+	TALLOC_CTX *loc_ctx;
 
 	if (server == NULL) { 
-		return dcerpc_pipe_connect(ctx, p, "ncalrpc", 
-								   &dcerpc_table_IRemoteActivation,
-					   			   ctx->dcom->credentials, ctx->event_ctx);
+		return dcerpc_pipe_connect(ctx->event_ctx, p, "ncalrpc", 
+								   &ndr_table_IRemoteActivation,
+					   			   dcom_get_server_credentials(ctx, NULL), ctx->event_ctx, ctx->lp_ctx);
 	}
+	loc_ctx = talloc_new(ctx);
 
 	/* Allow server name to contain a binding string */
-	if (NT_STATUS_IS_OK(dcerpc_parse_binding(mem_ctx, server, &bd))) {
-		status = dcerpc_pipe_connect_b(ctx, p, bd, 
-									   &dcerpc_table_IRemoteActivation,
-					       			   ctx->dcom->credentials, ctx->event_ctx);
-
-		talloc_free(mem_ctx);
-		return status;
+	if (strchr(server, ':') && NT_STATUS_IS_OK(dcerpc_parse_binding(loc_ctx, server, &bd))) {
+		if (DEBUGLVL(11))
+			bd->flags |= DCERPC_DEBUG_PRINT_BOTH;
+		status = dcerpc_pipe_connect_b(ctx->event_ctx, p, bd, 
+									   &ndr_table_IRemoteActivation,
+					       			   dcom_get_server_credentials(ctx, bd->host), ctx->event_ctx, ctx->lp_ctx);
+		goto end;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(available_transports); i++)
 	{
-		char *binding = talloc_asprintf(mem_ctx, "%s:%s", available_transports[i], server);
+		char *binding = talloc_asprintf(loc_ctx, "%s:%s", available_transports[i], server);
 		if (!binding) {
-			talloc_free(mem_ctx);
-			return NT_STATUS_NO_MEMORY;
-		}
-		
-		status = dcerpc_pipe_connect(ctx, p, binding, 
-									 &dcerpc_table_IRemoteActivation,
-					     ctx->dcom->credentials, ctx->event_ctx);
+			status = NT_STATUS_NO_MEMORY;
+			goto end;
+		};
+		status = dcerpc_pipe_connect(ctx->event_ctx, p, binding, &ndr_table_IRemoteActivation,
+					     dcom_get_server_credentials(ctx, server), ctx->event_ctx, ctx->lp_ctx);
 
 		if (NT_STATUS_IS_OK(status)) {
-			talloc_free(mem_ctx);
-			return status;
+			if (DEBUGLVL(11))
+				(*p)->conn->flags |= DCERPC_DEBUG_PRINT_BOTH;
+			goto end;
+		} else {
+			DEBUG(1,(__location__": dcom_connect_host : %s\n", get_friendly_nt_error_msg(status)));
 		}
 	}
-	
-	talloc_free(mem_ctx);
+
+end:
+	talloc_free(loc_ctx);
 	return status;
 }
 
@@ -128,9 +201,25 @@ struct dcom_object_exporter *object_exporter_by_oxid(struct com_context *ctx, ui
 	return NULL; 
 }
 
+struct dcom_object_exporter *object_exporter_update_oxid(struct com_context *ctx, uint64_t oxid, struct DUALSTRINGARRAY *bindings)
+{
+	struct dcom_object_exporter *ox;
+	ox = object_exporter_by_oxid(ctx, oxid);
+	if (!ox) {
+		ox = talloc_zero(ctx, struct dcom_object_exporter);
+		DLIST_ADD(ctx->dcom->object_exporters, ox);
+		ox->oxid = oxid;
+	} else {
+		talloc_free(ox->bindings);
+	}
+	ox->bindings = bindings;
+	talloc_steal(ox, bindings);
+	return ox;
+}
+
 struct dcom_object_exporter *object_exporter_by_ip(struct com_context *ctx, struct IUnknown *ip)
 {
-	return NULL; /* FIXME */
+	return object_exporter_by_oxid(ctx, ip->obj.u_objref.u_standard.std.oxid);
 }
 
 WERROR dcom_create_object(struct com_context *ctx, struct GUID *clsid, const char *server, int num_ifaces, struct GUID *iid, struct IUnknown ***ip, WERROR *results)
@@ -140,14 +229,26 @@ WERROR dcom_create_object(struct com_context *ctx, struct GUID *clsid, const cha
 	struct dcom_object_exporter *m;
 	NTSTATUS status;
 	struct RemoteActivation r;
-	struct DUALSTRINGARRAY dualstring;
+	struct DUALSTRINGARRAY *pds;
 	int i;
+	WERROR hr;
+	uint64_t oxid;
+	struct GUID ipidRemUnknown;
+	struct IUnknown *ru_template;
+	struct ORPCTHAT that;
+	uint32_t AuthnHint;
+	struct COMVERSION ServerVersion;
+	struct MInterfacePointer **ifaces;
+	TALLOC_CTX *loc_ctx;
 
 	status = dcom_connect_host(ctx, &p, server);
 	if (NT_STATUS_IS_ERR(status)) {
-		DEBUG(1, ("Unable to connect to %s - %s\n", server, nt_errstr(status)));
+		DEBUG(1, ("Unable to connect to %s - %s\n", server, get_friendly_nt_error_msg(status)));
 		return ntstatus_to_werror(status);
 	}
+	loc_ctx = talloc_new(ctx);
+
+	ifaces = talloc_array(loc_ctx, struct MInterfacePointer *, num_ifaces);
 
 	ZERO_STRUCT(r.in);
 	r.in.this.version.MajorVersion = COM_MAJOR_VERSION;
@@ -159,163 +260,228 @@ WERROR dcom_create_object(struct com_context *ctx, struct GUID *clsid, const cha
 	r.in.protseq = protseq;
 	r.in.Interfaces = num_ifaces;
 	r.in.pIIDs = iid;
-	r.out.ifaces = talloc_array(ctx, struct MInterfacePointer *, num_ifaces);
-	r.out.pdsaOxidBindings = &dualstring;
-	
-	status = dcerpc_RemoteActivation(p, ctx, &r);
+	r.out.that = &that;
+	r.out.pOxid = &oxid;
+	r.out.pdsaOxidBindings = &pds;
+	r.out.ipidRemUnknown = &ipidRemUnknown;
+	r.out.AuthnHint = &AuthnHint;
+	r.out.ServerVersion = &ServerVersion;
+	r.out.hr = &hr;
+	r.out.ifaces = ifaces;
+	r.out.results = results;
+
+	status = dcerpc_RemoteActivation(p, loc_ctx, &r);
+	talloc_free(p);
+
 	if(NT_STATUS_IS_ERR(status)) {
 		DEBUG(1, ("Error while running RemoteActivation %s\n", nt_errstr(status)));
-		return ntstatus_to_werror(status);
+		hr = ntstatus_to_werror(status);
+		goto end;
 	}
 
 	if(!W_ERROR_IS_OK(r.out.result)) {
-		return r.out.result; 
+		hr = r.out.result;
+		goto end;
 	}
 	
-	if(!W_ERROR_IS_OK(r.out.hr)) { 
-		return r.out.hr; 
+	if(!W_ERROR_IS_OK(hr)) {
+		goto end;
 	}
 
+	m = object_exporter_update_oxid(ctx, oxid, pds);
+
+	ru_template = NULL;
 	*ip = talloc_array(ctx, struct IUnknown *, num_ifaces);
 	for (i = 0; i < num_ifaces; i++) {
-		results[i] = r.out.results[i];
 		(*ip)[i] = NULL;
 		if (W_ERROR_IS_OK(results[i])) {
 			status = dcom_IUnknown_from_OBJREF(ctx, &(*ip)[i], &r.out.ifaces[i]->obj);
 			if (!NT_STATUS_IS_OK(status)) {
 				results[i] = ntstatus_to_werror(status);
-			}
+			} else if (!ru_template)
+				ru_template = (*ip)[i];
 		}
 	}
 
-	/* Add the OXID data for the returned oxid */
-	m = object_exporter_by_oxid(ctx, r.out.pOxid);
-	m->bindings = *r.out.pdsaOxidBindings;
-	
-	return WERR_OK;
+	/* TODO:avg check when exactly oxid should be updated,its lifetime etc */
+	if (m->rem_unknown && memcmp(&m->rem_unknown->obj.u_objref.u_standard.std.ipid, &ipidRemUnknown, sizeof(ipidRemUnknown))) {
+		talloc_free(m->rem_unknown);
+		m->rem_unknown = NULL;
+	}
+	if (!m->rem_unknown) {
+		if (!ru_template) {
+			DEBUG(1,("dcom_create_object: Cannot Create IRemUnknown - template interface not available\n"));
+			hr = WERR_GENERAL_FAILURE;
+		}
+		m->rem_unknown = talloc_zero(m, struct IRemUnknown);
+		memcpy(m->rem_unknown, ru_template, sizeof(struct IUnknown));
+		GUID_from_string(COM_IREMUNKNOWN_UUID, &m->rem_unknown->obj.iid);
+		m->rem_unknown->obj.u_objref.u_standard.std.ipid = ipidRemUnknown;
+		m->rem_unknown->vtable = (struct IRemUnknown_vtable *)dcom_proxy_vtable_by_iid(&m->rem_unknown->obj.iid);
+		/* TODO:avg copy stringbindigs?? */
+	}
+
+	dcom_update_credentials_for_aliases(ctx, server, pds);
+	{ 
+		char *c; 
+		c = strchr(server, '['); 
+		if (m->host) talloc_free(m->host); 
+		m->host = c ? talloc_strndup(m, server, c - server) : talloc_strdup(m, server); 
+	}
+	hr = WERR_OK;
+end:
+	talloc_free(loc_ctx);
+	return hr;
+}
+
+int find_similar_binding(struct STRINGBINDING **sb, const char *host)
+{ 
+	int i, l;
+	l = strlen(host);
+	for (i = 0; sb[i]; ++i) {
+		if ((sb[i]->wTowerId == EPM_PROTOCOL_TCP) && !strncasecmp(host, sb[i]->NetworkAddr, l) && (sb[i]->NetworkAddr[l] == '['))
+		break;
+	}
+	return i;
 }
 
-WERROR dcom_get_class_object(struct com_context *ctx, struct GUID *clsid, const char *server, struct GUID *iid, struct IUnknown **ip)
+WERROR dcom_query_interface(struct IUnknown *d, uint32_t cRefs, uint16_t cIids, struct GUID *iids, struct IUnknown **ip, WERROR *results)
 {
-	struct dcom_object_exporter *m;
-	struct RemoteActivation r;
-	struct dcerpc_pipe *p;
-	struct DUALSTRINGARRAY dualstring;
+	struct dcom_object_exporter *ox;
+	struct REMQIRESULT *rqir;
+	WERROR result;
 	NTSTATUS status;
-	struct MInterfacePointer pm;
-	struct MInterfacePointer *ifaces[1];
-	uint16_t protseq[] = DCOM_NEGOTIATED_PROTOCOLS;
+	int i;
+	TALLOC_CTX *loc_ctx;
+	struct IUnknown ru;
 
-	if (!server) {
-		return com_get_class_object(ctx, clsid, iid, ip);
-	}
+	loc_ctx = talloc_new(d);
+	ox = object_exporter_by_ip(d->ctx, d);
 
-	status = dcom_connect_host(ctx, &p, server);
-	if (NT_STATUS_IS_ERR(status)) {
-		DEBUG(1, ("Unable to connect to %s - %s\n", server, nt_errstr(status)));
-		return ntstatus_to_werror(status);
+	result = IRemUnknown_RemQueryInterface(ox->rem_unknown, loc_ctx, &IUnknown_ipid(d), cRefs, cIids, iids, &rqir);
+	if (!W_ERROR_IS_OK(result)) {
+		DEBUG(1, ("dcom_query_interface failed: %08X\n", W_ERROR_V(result)));
+		talloc_free(loc_ctx);
+		return result;
 	}
-
-	ZERO_STRUCT(r.in);
-	r.in.this.version.MajorVersion = COM_MAJOR_VERSION;
-	r.in.this.version.MinorVersion = COM_MINOR_VERSION;
-	r.in.this.cid = GUID_random();
-	r.in.Clsid = *clsid;
-	r.in.ClientImpLevel = RPC_C_IMP_LEVEL_IDENTIFY;
-	r.in.num_protseqs = ARRAY_SIZE(protseq);
-	r.in.protseq = protseq;
-	r.in.Interfaces = 1;
-	r.in.pIIDs = iid;
-	r.in.Mode = MODE_GET_CLASS_OBJECT;
-	r.out.ifaces = ifaces;
-	ifaces[0] = &pm;
-	r.out.pdsaOxidBindings = &dualstring;
-
-	status = dcerpc_RemoteActivation(p, ctx, &r);
-	if(NT_STATUS_IS_ERR(status)) {
-		DEBUG(1, ("Error while running RemoteActivation - %s\n", nt_errstr(status)));
-		return ntstatus_to_werror(status);
+	ru = *(struct IUnknown *)ox->rem_unknown;
+	for (i = 0; i < cIids; ++i) {
+		ip[i] = NULL;
+		results[i] = rqir[i].hResult;
+		if (W_ERROR_IS_OK(results[i])) {
+			ru.obj.iid = iids[i];
+			ru.obj.u_objref.u_standard.std = rqir[i].std;
+			status = dcom_IUnknown_from_OBJREF(d->ctx, &ip[i], &ru.obj);
+			if (!NT_STATUS_IS_OK(status)) {
+				results[i] = ntstatus_to_werror(status);
+			}
+		}
 	}
 
-	if(!W_ERROR_IS_OK(r.out.result)) { return r.out.result; }
-	if(!W_ERROR_IS_OK(r.out.hr)) { return r.out.hr; }
-	if(!W_ERROR_IS_OK(r.out.results[0])) { return r.out.results[0]; }
-	
-	/* Set up the interface data */
-	dcom_IUnknown_from_OBJREF(ctx, ip, &pm.obj);
-	
-	/* Add the OXID data for the returned oxid */
-	m = object_exporter_by_oxid(ctx, r.out.pOxid);
-	m->bindings = *r.out.pdsaOxidBindings;
-
+	talloc_free(loc_ctx);
 	return WERR_OK;
 }
 
+int is_ip_binding(const char* s)
+{
+	while (*s && (*s != '[')) {
+		if (((*s >= '0') && (*s <= '9')) || *s == '.')
+			++s;
+		else
+		    return 0;
+	}
+	return 1;
+}
+
 NTSTATUS dcom_get_pipe(struct IUnknown *iface, struct dcerpc_pipe **pp)
 {
 	struct dcerpc_binding *binding;
 	struct GUID iid;
 	uint64_t oxid;
 	NTSTATUS status;
-	int i;
+	int i, j, isimilar;
 	struct dcerpc_pipe *p;
-	TALLOC_CTX *tmp_ctx;
 	struct dcom_object_exporter *ox;
+	const struct ndr_interface_table *table;
 
-	ox = object_exporter_by_ip(iface->ctx, iface);
-
-	tmp_ctx = talloc_new(NULL);
+	ox = object_exporter_by_oxid(iface->ctx, iface->obj.u_objref.u_standard.std.oxid);
+	if (!ox) {
+		DEBUG(0, ("dcom_get_pipe: OXID not found\n"));
+		return NT_STATUS_NOT_SUPPORTED;
+	}
 
 	p = ox->pipe;
 	
 	iid = iface->vtable->iid;
+	table = ndr_table_by_uuid(&iid);
+	if (table == NULL) {
+		char *guid_str;
+		guid_str = GUID_string(NULL, &iid);
+		DEBUG(0,(__location__": dcom_get_pipe - unrecognized interface{%s}\n", guid_str));
+		talloc_free(guid_str);
+		return NT_STATUS_NOT_SUPPORTED;
+	}
+
+	if (p && p->last_fault_code) {
+		talloc_free(p);
+		ox->pipe = p = NULL;
+	}
 
 	if (p) {
 		if (!GUID_equal(&p->syntax.uuid, &iid)) {
-			struct dcerpc_pipe *p2;
 			ox->pipe->syntax.uuid = iid;
 
 			/* interface will always be present, so 
 			 * idl_iface_by_uuid can't return NULL */
-			status = dcerpc_secondary_context(p, &p2, idl_iface_by_uuid(&iid));
-
-			if (NT_STATUS_IS_OK(status)) {
-				p = p2;
-			}
-		} else {
-			p = talloc_reference(NULL, p);
-		}
+			/* status = dcerpc_secondary_context(p, &p2, idl_iface_by_uuid(&iid)); */
+			status = dcerpc_alter_context(p, p, &ndr_table_by_uuid(&iid)->syntax_id, &p->transfer_syntax);
+		} else
+			status = NT_STATUS_OK;
 		*pp = p;
-		talloc_free(tmp_ctx);
 		return status;
 	}
 
-	i = 0;
-	do {
+	status = NT_STATUS_NO_MORE_ENTRIES;
+
+	/* To avoid delays whe connecting nonroutable bindings we 1st check binding starting with hostname */
+	/* FIX:low create concurrent connections to all bindings, fastest wins - Win2k and newer does this way???? */
+	isimilar = find_similar_binding(ox->bindings->stringbindings, ox->host);
+	DEBUG(1, (__location__": dcom_get_pipe: host=%s, similar=%s\n", ox->host, ox->bindings->stringbindings[isimilar] ? ox->bindings->stringbindings[isimilar]->NetworkAddr : "None"));
+	j = isimilar - 1;
+	for (i = 0; ox->bindings->stringbindings[i]; ++i) {
+		if (!ox->bindings->stringbindings[++j]) j = 0;
+		/* FIXME:LOW Use also other transports if possible */
+		if ((j != isimilar) && (ox->bindings->stringbindings[j]->wTowerId != EPM_PROTOCOL_TCP || !is_ip_binding(ox->bindings->stringbindings[j]->NetworkAddr))) {
+			DEBUG(9, ("dcom_get_pipe: Skipping stringbinding %24.24s\n", ox->bindings->stringbindings[j]->NetworkAddr));
+			continue;
+		}
+		DEBUG(9, ("dcom_get_pipe: Trying stringbinding %s\n", ox->bindings->stringbindings[j]->NetworkAddr));
 		status = dcerpc_binding_from_STRINGBINDING(iface->ctx, &binding, 
-							   ox->bindings.stringbindings[i]);
+							   ox->bindings->stringbindings[j]);
 		if (!NT_STATUS_IS_OK(status)) {
 			DEBUG(1, ("Error parsing string binding"));
 		} else {
-			status = dcerpc_pipe_connect_b(NULL, &p, binding, 
-						       idl_iface_by_uuid(&iid),
-						       iface->ctx->dcom->credentials,
-							   iface->ctx->event_ctx);
+			/* FIXME:LOW Make flags more flexible */
+			binding->flags |= DCERPC_AUTH_NTLM | DCERPC_SIGN;
+			if (DEBUGLVL(11))
+				binding->flags |= DCERPC_DEBUG_PRINT_BOTH;
+			status = dcerpc_pipe_connect_b(iface->ctx->event_ctx, &p, binding, 
+						       ndr_table_by_uuid(&iid),
+						       dcom_get_server_credentials(iface->ctx, binding->host),
+							   iface->ctx->event_ctx, iface->ctx->lp_ctx);
+			talloc_unlink(iface->ctx, binding);
 		}
-		talloc_free(binding);
-		i++;
-	} while (!NT_STATUS_IS_OK(status) && ox->bindings.stringbindings[i]);
+		if (NT_STATUS_IS_OK(status)) break;
+	}
 
 	if (NT_STATUS_IS_ERR(status)) {
 		DEBUG(0, ("Unable to connect to remote host - %s\n", nt_errstr(status)));
-		talloc_free(tmp_ctx);
 		return status;
 	}
 
 	DEBUG(2, ("Successfully connected to OXID %llx\n", (long long)oxid));
 	
-	*pp = p;
-	talloc_free(tmp_ctx);
+	ox->pipe = *pp = p;
 
 	return NT_STATUS_OK;
 }
@@ -325,20 +491,26 @@ NTSTATUS dcom_OBJREF_from_IUnknown(struct OBJREF *o, struct IUnknown *p)
 	/* FIXME: Cache generated objref objects? */
 	ZERO_STRUCTP(o);
 	
-	o->signature = OBJREF_SIGNATURE;
-	
 	if (!p) {
+		o->signature = OBJREF_SIGNATURE;
 		o->flags = OBJREF_NULL;
 	} else {
-		o->iid = p->vtable->iid;
-		/* 
-		OBJREF_STANDARD
-		OBJREF_CUSTOM
-		OBJREF_HANDLER
-		*/
+		*o = p->obj;
+		switch(o->flags) {
+		case OBJREF_CUSTOM: {
+			marshal_fn marshal;
+
+			marshal = dcom_marshal_by_clsid(&o->u_objref.u_custom.clsid);
+			if (marshal) {
+				return marshal(p, o);
+			} else {
+				return NT_STATUS_NOT_SUPPORTED;
+			}
+		}
+		}
 	}
 
-	return NT_STATUS_NOT_IMPLEMENTED;	
+	return NT_STATUS_OK;
 }
 
 NTSTATUS dcom_IUnknown_from_OBJREF(struct com_context *ctx, struct IUnknown **_p, struct OBJREF *o)
@@ -350,39 +522,50 @@ NTSTATUS dcom_IUnknown_from_OBJREF(struct com_context *ctx, struct IUnknown **_p
 	case OBJREF_NULL: 
 		*_p = NULL;
 		return NT_STATUS_OK;
-		
+
 	case OBJREF_STANDARD:
-		p = talloc(ctx, struct IUnknown);
-		p->ctx = ctx;	
+		p = talloc_zero(ctx, struct IUnknown);
+		p->ctx = ctx;
+		p->obj = *o;
 		p->vtable = dcom_proxy_vtable_by_iid(&o->iid);
+
 		if (!p->vtable) {
 			DEBUG(0, ("Unable to find proxy class for interface with IID %s\n", GUID_string(ctx, &o->iid)));
 			return NT_STATUS_NOT_SUPPORTED;
 		}
 
+		p->vtable->Release_send = dcom_release_send;
+
 		ox = object_exporter_by_oxid(ctx, o->u_objref.u_standard.std.oxid);
 		/* FIXME: Add object to list of objects to ping */
 		*_p = p;
 		return NT_STATUS_OK;
 		
 	case OBJREF_HANDLER:
-		p = talloc(ctx, struct IUnknown);
+		p = talloc_zero(ctx, struct IUnknown);
 		p->ctx = ctx;	
+		p->obj = *o;
 		ox = object_exporter_by_oxid(ctx, o->u_objref.u_handler.std.oxid );
 		/* FIXME: Add object to list of objects to ping */
 /*FIXME		p->vtable = dcom_vtable_by_clsid(&o->u_objref.u_handler.clsid);*/
 		/* FIXME: Do the custom unmarshaling call */
 	
 		*_p = p;
-		return NT_STATUS_OK;
+		return NT_STATUS_NOT_SUPPORTED;
 		
 	case OBJREF_CUSTOM:
-		p = talloc(ctx, struct IUnknown);
+		p = talloc_zero(ctx, struct IUnknown);
 		p->ctx = ctx;	
 		p->vtable = NULL;
-		/* FIXME: Do the actual custom unmarshaling call */
+		p->obj = *o;
+		unmarshal_fn unmarshal;
+		unmarshal = dcom_unmarshal_by_clsid(&o->u_objref.u_custom.clsid);
 		*_p = p;
-		return NT_STATUS_NOT_SUPPORTED;
+		if (unmarshal) {
+		    return unmarshal(ctx, o, _p);
+		} else {
+		    return NT_STATUS_NOT_SUPPORTED;
+		}
 	}
 
 	return NT_STATUS_NOT_SUPPORTED;
@@ -392,3 +575,112 @@ uint64_t dcom_get_current_oxid(void)
 {
 	return getpid();
 }
+
+/* FIXME:Fake async dcom_get_pipe_* */
+struct composite_context *dcom_get_pipe_send(struct IUnknown *d, TALLOC_CTX *mem_ctx)
+{
+        struct composite_context *c;
+
+        c = composite_create(0, d->ctx->event_ctx);
+        if (c == NULL) return NULL;
+        c->private_data = d;
+        /* composite_done(c); bugged - callback is triggered twice by composite_continue and composite_done */
+        c->state = COMPOSITE_STATE_DONE; /* this is workaround */
+
+        return c;
+}
+
+NTSTATUS dcom_get_pipe_recv(struct composite_context *c, struct dcerpc_pipe **pp)
+{
+        NTSTATUS status;
+
+        status = dcom_get_pipe((struct IUnknown *)c->private_data, pp);
+        talloc_free(c);
+
+        return status;
+}
+
+/* FIXME:avg put IUnknown_Release_out into header */
+struct IUnknown_Release_out {
+        uint32_t result;
+};
+
+void dcom_release_continue(struct composite_context *cr)
+{
+	struct composite_context *c;
+	struct IUnknown *d;
+	struct IUnknown_Release_out *out;
+	WERROR r;
+
+	c = talloc_get_type(cr->async.private_data, struct composite_context);
+	d = c->private_data;
+	r = IRemUnknown_RemRelease_recv(cr);
+	talloc_free(d);
+	out = talloc_zero(c, struct IUnknown_Release_out);
+	out->result = W_ERROR_V(r);
+	c->private_data = out;
+	composite_done(c);
+}
+
+struct composite_context *dcom_release_send(struct IUnknown *d, TALLOC_CTX *mem_ctx)
+{
+        struct composite_context *c, *cr;
+	struct REMINTERFACEREF iref;
+	struct dcom_object_exporter *ox;
+
+        c = composite_create(d->ctx, d->ctx->event_ctx);
+        if (c == NULL) return NULL;
+        c->private_data = d;
+
+	ox = object_exporter_by_ip(d->ctx, d);
+	iref.ipid = IUnknown_ipid(d);
+	iref.cPublicRefs = 5;
+	iref.cPrivateRefs = 0;
+	cr = IRemUnknown_RemRelease_send(ox->rem_unknown, mem_ctx, 1, &iref);
+
+	composite_continue(c, cr, dcom_release_continue, c);
+	return c;
+}
+
+uint32_t dcom_release_recv(struct composite_context *c)
+{
+	NTSTATUS status;
+	WERROR r;
+
+	status = composite_wait(c);
+	if (!NT_STATUS_IS_OK(status))
+		r = ntstatus_to_werror(status);
+	else
+		W_ERROR_V(r) = ((struct IUnknown_Release_out *)c->private_data)->result;
+	talloc_free(c);
+	return W_ERROR_IS_OK(r) ? 0 : W_ERROR_V(r);
+}
+
+uint32_t dcom_release(void *interface, TALLOC_CTX *mem_ctx)
+{
+	struct composite_context *c;
+
+	c = dcom_release_send(interface, mem_ctx);
+	return dcom_release_recv(c);
+}
+
+void dcom_proxy_async_call_recv_pipe_send_rpc(struct composite_context *c_pipe)
+{
+        struct composite_context *c;
+        struct dcom_proxy_async_call_state *s;
+        struct dcerpc_pipe *p;
+        struct rpc_request *req;
+        NTSTATUS status;
+
+        c = c_pipe->async.private_data;
+        s = talloc_get_type(c->private_data, struct dcom_proxy_async_call_state);
+
+        status = dcom_get_pipe_recv(c_pipe, &p);
+        if (!NT_STATUS_IS_OK(status)) {
+                composite_error(c, NT_STATUS_RPC_NT_CALL_FAILED);
+                return;
+        }
+
+        req = dcerpc_ndr_request_send(p, &s->d->obj.u_objref.u_standard.std.ipid, s->table, s->opnum, s, s->r);
+        composite_continue_rpc(c, req, s->continuation, c);
+}