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-rw-r--r--libcli/smb/smb2cli_echo.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/libcli/smb/smb2cli_echo.c b/libcli/smb/smb2cli_echo.c
new file mode 100644
index 0000000..39c592c
--- /dev/null
+++ b/libcli/smb/smb2cli_echo.c
@@ -0,0 +1,122 @@
+/*
+ Unix SMB/CIFS implementation.
+ smb2 lib
+ Copyright (C) Stefan Metzmacher 2012
+
+ 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
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/network.h"
+#include "lib/util/tevent_ntstatus.h"
+#include "smb_common.h"
+#include "smbXcli_base.h"
+
+struct smb2cli_echo_state {
+ uint8_t fixed[0x4];
+};
+
+static void smb2cli_echo_done(struct tevent_req *subreq);
+
+struct tevent_req *smb2cli_echo_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct smbXcli_conn *conn,
+ uint32_t timeout_msec)
+{
+ struct tevent_req *req, *subreq;
+ struct smb2cli_echo_state *state;
+ uint8_t *fixed;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct smb2cli_echo_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ fixed = state->fixed;
+ SSVAL(fixed, 0, 4);
+ SSVAL(fixed, 2, 0);
+
+ subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_KEEPALIVE,
+ 0, 0, /* flags */
+ timeout_msec,
+ NULL, /* tcon */
+ NULL, /* session */
+ state->fixed, sizeof(state->fixed),
+ NULL, 0, /* dyn* */
+ 0); /* max_dyn_len */
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, smb2cli_echo_done, req);
+ return req;
+}
+
+static void smb2cli_echo_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req =
+ tevent_req_callback_data(subreq,
+ struct tevent_req);
+ NTSTATUS status;
+ static const struct smb2cli_req_expected_response expected[] = {
+ {
+ .status = NT_STATUS_OK,
+ .body_size = 0x04
+ }
+ };
+
+ status = smb2cli_req_recv(subreq, NULL, NULL,
+ expected, ARRAY_SIZE(expected));
+ TALLOC_FREE(subreq);
+ if (tevent_req_nterror(req, status)) {
+ return;
+ }
+ tevent_req_done(req);
+}
+
+NTSTATUS smb2cli_echo_recv(struct tevent_req *req)
+{
+ return tevent_req_simple_recv_ntstatus(req);
+}
+
+NTSTATUS smb2cli_echo(struct smbXcli_conn *conn,
+ uint32_t timeout_msec)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct tevent_context *ev;
+ struct tevent_req *req;
+ NTSTATUS status = NT_STATUS_NO_MEMORY;
+
+ if (smbXcli_conn_has_async_calls(conn)) {
+ /*
+ * Can't use sync call while an async call is in flight
+ */
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto fail;
+ }
+ ev = samba_tevent_context_init(frame);
+ if (ev == NULL) {
+ goto fail;
+ }
+ req = smb2cli_echo_send(frame, ev, conn, timeout_msec);
+ if (req == NULL) {
+ goto fail;
+ }
+ if (!tevent_req_poll_ntstatus(req, ev, &status)) {
+ goto fail;
+ }
+ status = smb2cli_echo_recv(req);
+ fail:
+ TALLOC_FREE(frame);
+ return status;
+}