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s3:rpc_client: add cli_rpc_pipe_client_prepare_alter() helper

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This will allow to do an alter context if security context multiplexing
is negotiated or opening a new connection in the same association group.

The old connection will be kept open, but not used anymore...

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This commit is contained in:
Stefan Metzmacher 2024-09-17 05:54:05 +02:00 committed by Ralph Boehme
parent 899c9f2d68
commit dd79808415
2 changed files with 86 additions and 0 deletions
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81
source3/rpc_client/cli_pipe.c
View File

@ -4045,6 +4045,87 @@ static NTSTATUS cli_rpc_pipe_open(struct cli_state *cli,
return NT_STATUS_OK;
}
static NTSTATUS cli_rpc_pipe_client_reconnect(struct rpc_pipe_client *p)
{
enum dcerpc_transport_t transport =
dcerpc_binding_get_transport(p->assoc->binding);
NTSTATUS status;
switch (transport) {
case NCACN_IP_TCP:
status = rpc_pipe_open_tcp_port(p,
p->assoc,
&p->conn);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
break;
case NCACN_NP:
status = rpc_client_connection_np(p->np_cli,
p->assoc,
&p->conn);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
talloc_steal(p, p->conn);
break;
default:
return NT_STATUS_NOT_IMPLEMENTED;
}
return NT_STATUS_OK;
}
NTSTATUS cli_rpc_pipe_client_prepare_alter(struct rpc_pipe_client *p,
bool new_auth_context,
const struct ndr_interface_table *table,
bool new_pres_context)
{
uint32_t f = p->assoc->features.negotiated;
NTSTATUS status;
if (!new_auth_context && !new_pres_context) {
return NT_STATUS_INVALID_PARAMETER_MIX;
}
TALLOC_FREE(p->binding_handle);
if (new_auth_context) {
p->auth = NULL;
}
if (new_auth_context &&
!(f & DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING))
{
/*
* new auth context without
* security context multiplexing.
*
* We need to create a new transport
* connection is the same association
* group
*
* We need to keep the old connection alive
* in order to connect to the existing association
* group..., so no TALLOC_FREE(p->conn)
*/
p->conn = NULL;
status = cli_rpc_pipe_client_reconnect(p);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
}
if (new_pres_context) {
/* rpc_pipe_bind_send should allocate an id... */
p->pres_context_id = UINT16_MAX;
p->table = table;
p->transfer_syntax = ndr_transfer_syntax_ndr;
}
return NT_STATUS_OK;
}
/****************************************************************************
Open a named pipe to an SMB server and bind anonymously.
****************************************************************************/

5
source3/rpc_client/cli_pipe.h
View File

@ -81,6 +81,11 @@ NTSTATUS cli_rpc_pipe_open_noauth(struct cli_state *cli,
const struct ndr_interface_table *table,
struct rpc_pipe_client **presult);
NTSTATUS cli_rpc_pipe_client_prepare_alter(struct rpc_pipe_client *p,
bool new_auth_context,
const struct ndr_interface_table *table,
bool new_pres_context);
NTSTATUS cli_rpc_pipe_open_noauth_transport(struct cli_state *cli,
enum dcerpc_transport_t transport,
const struct ndr_interface_table *table,