Feat : LWIP integration part1

Change-Id: Ia26c092d16579c6f845a021ba66bde106363883a
Signed-off-by: Swarup Nayak <swarupnpvt@gmail.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/stacks/lwip_stack/lwip_src/common/stackx_tcp_opt.h b/stacks/lwip_stack/lwip_src/common/stackx_tcp_opt.h
new file mode 100644
index 0000000..cac3dcb
--- /dev/null
+++ b/stacks/lwip_stack/lwip_src/common/stackx_tcp_opt.h
@@ -0,0 +1,42 @@
+/*
+*
+* Copyright (c) 2018 Huawei Technologies Co.,Ltd.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at:
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#ifndef __STACKX_TCP_OPT_H__
+#define __STACKX_TCP_OPT_H__
+
+#include "spl_opt.h"
+
+/* TCP Options flags */
+#define TF_ACK_DELAY        ((u32_t)0x01U)      /* Delayed ACK. */
+#define TF_ACK_NOW          ((u32_t)0x02U)      /* Immediate ACK. */
+#define TF_WINDOWSCALING    ((u32_t)0x40U)      /* Window scaling option enabled */
+#define TF_INFR             ((u32_t)0x04U)      /* In fast recovery. */
+#define TF_TIMESTAMP        ((u32_t)0x08U)      /* Timestamp option enabled */
+#define TF_RXCLOSED         ((u32_t)0x10U)      /* rx closed by tcp_shutdown */
+#define TF_FIN              ((u32_t)0x20U)      /* Connection was closed locally (FIN segment enqueued). */
+#define TF_NODELAY          ((u32_t)0x100U)     /* Disable Nagle algorithm */
+#define TF_NAGLEMEMERR      ((u32_t)0x80U)
+
+/* TCP segment Options flags */
+#define TF_SEG_OPTS_MSS             (u8_t)0x01U /* Include MSS option. */
+#define TF_SEG_OPTS_TS              (u8_t)0x02U /* Include timestamp option. */
+#define TF_SEG_OPTS_WS              (u8_t)0x08U /* Include window scaling option. */
+
+#define STACKX_TCP_OPT_LENGTH(flags) \
+    (flags & TF_SEG_OPTS_MSS ? 4  : 0) + \
+    (flags & TF_SEG_OPTS_TS  ? 12 : 0) + \
+    (flags & TF_SEG_OPTS_WS ? 4 : 0)
+#endif