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-rw-r--r--source4/torture/smb2/credits.c268
1 files changed, 268 insertions, 0 deletions
diff --git a/source4/torture/smb2/credits.c b/source4/torture/smb2/credits.c
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+++ b/source4/torture/smb2/credits.c
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+/*
+ Unix SMB/CIFS implementation.
+
+ test suite for SMB2 credits
+
+ Copyright (C) Ralph Boehme 2017
+
+ 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 "libcli/smb2/smb2.h"
+#include "libcli/smb2/smb2_calls.h"
+#include "torture/torture.h"
+#include "torture/smb2/proto.h"
+#include "../libcli/smb/smbXcli_base.h"
+#include "lib/param/param.h"
+
+/**
+ * Request 64k credits in negprot/sessionsetup and require at least 8k
+ *
+ * This passes against Windows 2016
+ **/
+static bool test_session_setup_credits_granted(struct torture_context *tctx,
+ struct smb2_tree *_tree)
+{
+ struct smbcli_options options;
+ struct smb2_transport *transport = NULL;
+ struct smb2_tree *tree = NULL;
+ uint16_t cur_credits;
+ NTSTATUS status;
+ bool ret = true;
+
+ transport = _tree->session->transport;
+ options = transport->options;
+
+ status = smb2_logoff(_tree->session);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done,
+ "smb2_logoff failed\n");
+ TALLOC_FREE(_tree);
+
+ options.max_credits = 65535;
+
+ ret = torture_smb2_connection_ext(tctx, 0, &options, &tree);
+ torture_assert_goto(tctx, ret == true, ret, done,
+ "torture_smb2_connection_ext failed\n");
+
+ transport = tree->session->transport;
+
+ cur_credits = smb2cli_conn_get_cur_credits(transport->conn);
+ if (cur_credits < 8192) {
+ torture_result(tctx, TORTURE_FAIL,
+ "Server only granted %" PRIu16" credits\n",
+ cur_credits);
+ ret = false;
+ goto done;
+ }
+
+done:
+ TALLOC_FREE(tree);
+ return ret;
+}
+
+/**
+ * Request 64K credits in a single SMB2 request and requite at least 8192
+ *
+ * This passes against Windows 2016
+ **/
+static bool test_single_req_credits_granted(struct torture_context *tctx,
+ struct smb2_tree *_tree)
+{
+ struct smbcli_options options;
+ struct smb2_transport *transport = NULL;
+ struct smb2_tree *tree = NULL;
+ struct smb2_handle h = {{0}};
+ struct smb2_create create;
+ const char *fname = "single_req_credits_granted.dat";
+ uint16_t cur_credits;
+ NTSTATUS status;
+ bool ret = true;
+
+ smb2_util_unlink(_tree, fname);
+
+ transport = _tree->session->transport;
+ options = transport->options;
+
+ status = smb2_logoff(_tree->session);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done,
+ "smb2_logoff failed\n");
+ TALLOC_FREE(_tree);
+
+ options.max_credits = 1;
+
+ ret = torture_smb2_connection_ext(tctx, 0, &options, &tree);
+ torture_assert_goto(tctx, ret == true, ret, done,
+ "torture_smb2_connection_ext failed\n");
+
+ transport = tree->session->transport;
+
+ cur_credits = smb2cli_conn_get_cur_credits(transport->conn);
+ if (cur_credits != 1) {
+ torture_result(tctx, TORTURE_FAIL,
+ "Only wanted 1 credit but server granted %" PRIu16"\n",
+ cur_credits);
+ ret = false;
+ goto done;
+ }
+
+ smb2cli_conn_set_max_credits(transport->conn, 65535);
+
+ ZERO_STRUCT(create);
+ create.in.impersonation_level = NTCREATEX_IMPERSONATION_IMPERSONATION;
+ create.in.desired_access = SEC_RIGHTS_FILE_ALL;
+ create.in.file_attributes = FILE_ATTRIBUTE_NORMAL;
+ create.in.create_disposition = NTCREATEX_DISP_OPEN_IF;
+ create.in.fname = fname;
+
+ status = smb2_create(tree, tctx, &create);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done,
+ "smb2_create failed\n");
+ h = create.out.file.handle;
+
+ cur_credits = smb2cli_conn_get_cur_credits(transport->conn);
+ if (cur_credits < 8192) {
+ torture_result(tctx, TORTURE_FAIL,
+ "Server only granted %" PRIu16" credits\n",
+ cur_credits);
+ ret = false;
+ goto done;
+ }
+
+done:
+ if (!smb2_util_handle_empty(h)) {
+ smb2_util_close(tree, h);
+ }
+ smb2_util_unlink(tree, fname);
+ TALLOC_FREE(tree);
+ return ret;
+}
+
+static bool test_crediting_skipped_mid(struct torture_context *tctx,
+ struct smb2_tree *_tree)
+{
+ struct smbcli_options options;
+ struct smb2_transport *transport = NULL;
+ struct smb2_tree *tree = NULL;
+ struct smb2_handle h = {{0}};
+ struct smb2_create create;
+ const char *fname = "skipped_mid.dat";
+ uint64_t mid;
+ uint16_t cur_credits;
+ NTSTATUS status;
+ bool ret = true;
+ int i;
+
+ smb2_util_unlink(_tree, fname);
+
+ transport = _tree->session->transport;
+ options = transport->options;
+
+ status = smb2_logoff(_tree->session);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done, "smb2_logoff failed\n");
+ TALLOC_FREE(_tree);
+
+ options.max_credits = 8192;
+
+ ret = torture_smb2_connection_ext(tctx, 0, &options, &tree);
+ torture_assert_goto(tctx, ret == true, ret, done, "torture_smb2_connection_ext failed\n");
+
+ transport = tree->session->transport;
+
+ cur_credits = smb2cli_conn_get_cur_credits(transport->conn);
+ if (cur_credits != 8192) {
+ torture_result(tctx, TORTURE_FAIL, "Server only granted %" PRIu16" credits\n", cur_credits);
+ ret = false;
+ goto done;
+ }
+
+ ZERO_STRUCT(create);
+ create.in.impersonation_level = NTCREATEX_IMPERSONATION_IMPERSONATION;
+ create.in.desired_access = SEC_RIGHTS_FILE_ALL;
+ create.in.file_attributes = FILE_ATTRIBUTE_NORMAL;
+ create.in.create_disposition = NTCREATEX_DISP_OPEN_IF;
+ create.in.fname = fname;
+
+ status = smb2_create(tree, tctx, &create);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done, "smb2_create failed\n");
+ h = create.out.file.handle;
+
+ /*
+ * See what happens if we skip a mid. As we want to avoid triggering our
+ * client side mid window check we keep conn->smb2.cur_credits
+ * unchanged so the server keeps granting credits until it's max mid
+ * windows size is reached at which point it will disconnect us:
+ *
+ * o Windows 2016 currently has a maximum mid window size of 8192 by
+ * default
+ *
+ * o Samba's limit is 512
+ *
+ * o Windows 2008r2 uses some special algorithm (MS-SMB2 3.3.1.1
+ * footnote <167>) that kicks in once a mid is skipped, resulting in a
+ * maximum window size of 100-300 depending on the number of granted
+ * credits at the moment of skipping a mid.
+ */
+
+ mid = smb2cli_conn_get_mid(tree->session->transport->conn);
+ smb2cli_conn_set_mid(tree->session->transport->conn, mid + 1);
+
+ for (i = 0; i < 8191; i++) {
+ status = smb2_util_write(tree, h, "\0", 0, 1);
+ if (!NT_STATUS_IS_OK(status)) {
+ torture_result(tctx, TORTURE_FAIL, "Server only allowed %d writes\n", i);
+ ret = false;
+ goto done;
+ }
+ }
+
+ /*
+ * Now use the skipped mid (the smb2_util_close...), we should
+ * immediately get a full mid window of size 8192.
+ */
+ smb2cli_conn_set_mid(tree->session->transport->conn, mid);
+ status = smb2_util_close(tree, h);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done, "smb2_close failed\n");
+ ZERO_STRUCT(h);
+
+ cur_credits = smb2cli_conn_get_cur_credits(transport->conn);
+ if (cur_credits != 8192) {
+ torture_result(tctx, TORTURE_FAIL, "Server only granted %" PRIu16" credits\n", cur_credits);
+ ret = false;
+ goto done;
+ }
+
+ smb2cli_conn_set_mid(tree->session->transport->conn, mid + 8192);
+
+done:
+ if (!smb2_util_handle_empty(h)) {
+ smb2_util_close(tree, h);
+ }
+ smb2_util_unlink(tree, fname);
+ TALLOC_FREE(tree);
+ return ret;
+}
+
+struct torture_suite *torture_smb2_crediting_init(TALLOC_CTX *ctx)
+{
+ struct torture_suite *suite = torture_suite_create(ctx, "credits");
+
+ torture_suite_add_1smb2_test(suite, "session_setup_credits_granted", test_session_setup_credits_granted);
+ torture_suite_add_1smb2_test(suite, "single_req_credits_granted", test_single_req_credits_granted);
+ torture_suite_add_1smb2_test(suite, "skipped_mid", test_crediting_skipped_mid);
+
+ suite->description = talloc_strdup(suite, "SMB2-CREDITS tests");
+
+ return suite;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 13:31:08 +0000