TCP support RFC6528 and add optimized memory copy function for C-SKY.

16 files changed, 281 insertions, 5 deletions

diff --git a/SylixOS/CHANGELOG b/SylixOS/CHANGELOG
index e568248..15804b7 100644
--- a/SylixOS/CHANGELOG
+++ b/SylixOS/CHANGELOG
@@ -4,6 +4,9 @@ HISTORY
 
 ++ New features:
 
+    2020-12-23: han.hui
+    加入 RFC6528 安全标准支持.
+
     2020-10-04: han.hui
     加入 sys/random.h 支持.
 
diff --git a/SylixOS/arch/arm64/common/arm64Exc.c b/SylixOS/arch/arm64/common/arm64Exc.c
index d50162b..bfc8839 100644
--- a/SylixOS/arch/arm64/common/arm64Exc.c
+++ b/SylixOS/arch/arm64/common/arm64Exc.c
@@ -170,6 +170,10 @@ VOID  archSyncExcHandle (ARCH_REG_CTX  *pregctx, UINT32  uiExcType)
     switch (uiExcClass) {
 
     case EXC_UNKNOWN_REASON:
+        abtInfo.VMABT_uiMethod = LW_VMM_ABORT_METHOD_EXEC;
+        abtInfo.VMABT_uiType   = LW_VMM_ABORT_TYPE_UNDEF;               /*  指令错误                    */
+        break;
+
     case EXC_TRAP_WFI_WFE:
     case EXC_EL3:
         abtInfo.VMABT_uiMethod = 0;
@@ -225,6 +229,12 @@ VOID  archSyncExcHandle (ARCH_REG_CTX  *pregctx, UINT32  uiExcType)
 
     case EXC_DATA_ABORT_LO:
     case EXC_DATA_ABORT:
+        if (uiExcISS == 0x21) {
+            abtInfo.VMABT_uiMethod = LW_VMM_ABORT_METHOD_EXEC;
+            abtInfo.VMABT_uiType   = LW_VMM_ABORT_TYPE_BUS;             /*  非对齐访问错误              */
+            break;
+        }
+
         ulAbortAddr            = arm64MmuAbtFaultAddr();
         abtInfo.VMABT_uiMethod = (uiExcISS & 0x40) ? LW_VMM_ABORT_METHOD_WRITE : LW_VMM_ABORT_METHOD_READ;
         abtInfo.VMABT_uiType   = LW_VMM_ABORT_TYPE_MAP;                 /*  数据错误                    */
diff --git a/SylixOS/arch/csky/csky_support.h b/SylixOS/arch/csky/csky_support.h
index 0212b9f..fe13314 100644
--- a/SylixOS/arch/csky/csky_support.h
+++ b/SylixOS/arch/csky/csky_support.h
@@ -42,8 +42,14 @@
 *********************************************************************************************************/
 
 #define __ARCH_KERNEL_PARAM         archKernelParam
+#define __ARCH_MEMCPY               archMemcpy
+#define __ARCH_MEMMOVE              archMemmove
+#define __ARCH_MEMSET               archMemset
 
 VOID    archKernelParam(CPCHAR  pcParam);
+PVOID   archMemcpy(PVOID   pvDest, CPVOID  pvSrc, size_t  stCount);
+PVOID   archMemmove(PVOID  pvDest, CPVOID  pvSrc, size_t  stCount);
+PVOID   archMemset(PVOID   pvDest, INT  iC, size_t  stCount);
 
 /*********************************************************************************************************
   C-SKY 处理器断言
diff --git a/SylixOS/lib/libc/string/lib_memcpy.c b/SylixOS/lib/libc/string/lib_memcpy.c
index 4a25111..802eb65 100644
--- a/SylixOS/lib/libc/string/lib_memcpy.c
+++ b/SylixOS/lib/libc/string/lib_memcpy.c
@@ -21,6 +21,7 @@
 ** BUG:
 2016.07.15  优化速度.
 *********************************************************************************************************/
+#define  __SYLIXOS_KERNEL
 #include "../SylixOS/kernel/include/k_kernel.h"
 /*********************************************************************************************************
   按 ULONG 对齐方式拷贝
diff --git a/SylixOS/lib/libc/string/lib_memset.c b/SylixOS/lib/libc/string/lib_memset.c
index 568ef35..f1f4a4c 100644
--- a/SylixOS/lib/libc/string/lib_memset.c
+++ b/SylixOS/lib/libc/string/lib_memset.c
@@ -24,6 +24,7 @@
 2016.07.15  优化速度.
 2018.12.26  优化程序结构.
 *********************************************************************************************************/
+#define  __SYLIXOS_KERNEL
 #include "../SylixOS/kernel/include/k_kernel.h"
 /*********************************************************************************************************
   按 ULONG 对齐方式拷贝
diff --git a/SylixOS/mktemp/libsylixos.mk b/SylixOS/mktemp/libsylixos.mk
index 9a6002a..7ff8353 100644
--- a/SylixOS/mktemp/libsylixos.mk
+++ b/SylixOS/mktemp/libsylixos.mk
@@ -126,7 +126,7 @@ else
 $(OUTPATH)/symbol.c: $($(target)_A)
 		@rm -f $@
 		cp SylixOS/hosttools/makesymbol/Makefile $(OUTDIR)
-		cp SylixOS/hosttools/makesymbol/makesymbol.exe $(OUTDIR)
+		cp SylixOS/hosttools/makesymbol/makesymbol.bat $(OUTDIR)
 		cp SylixOS/hosttools/makesymbol/makesymbol.sh $(OUTDIR)
 		cp SylixOS/hosttools/makesymbol/nm.exe $(OUTDIR)
 		make -C $(OUTDIR)
diff --git a/SylixOS/net/lwip/lwip_config.h b/SylixOS/net/lwip/lwip_config.h
index 79ee642..3bc5463 100644
--- a/SylixOS/net/lwip/lwip_config.h
+++ b/SylixOS/net/lwip/lwip_config.h
@@ -111,7 +111,9 @@ extern PVOID  lwip_platform_smemcpy(PVOID  pvDest, CPVOID  pvSrc, size_t  stCoun
 #define PBUF_POOL_SIZE                  LW_CFG_LWIP_NUM_POOLS           /*  pool num                    */
 #define PBUF_POOL_BUFSIZE               LW_CFG_LWIP_POOL_SIZE           /*  pool block size             */
 
-#if MEM_SIZE >= (1 * LW_CFG_MB_SIZE)
+#if MEM_SIZE >= (2 * LW_CFG_MB_SIZE)
+#define MEMP_NUM_REASSDATA              1024
+#elif MEM_SIZE >= (1 * LW_CFG_MB_SIZE)
 #define MEMP_NUM_REASSDATA              512                             /*  同时进行重组的 IP 数据包    */
 #elif MEM_SIZE >= (512 * LW_CFG_KB_SIZE)
 #define MEMP_NUM_REASSDATA              256
@@ -742,6 +744,12 @@ extern INT  __inetHostTableGetItem(CPCHAR  pcHost, size_t  stLen, PVOID  pvAddr,
 #define LWIP_HOOK_FILENAME          "network/arch/hook.h"               /*  hook 声明                   */
 
 /*********************************************************************************************************
+  lwip tcp hook
+*********************************************************************************************************/
+
+#define LWIP_HOOK_TCP_ISN           tcp_isn_hook
+
+/*********************************************************************************************************
   lwip ip route hook
 *********************************************************************************************************/
 
diff --git a/SylixOS/net/lwip/lwip_fix.c b/SylixOS/net/lwip/lwip_fix.c
index f4b4ded..4cfb0f3 100644
--- a/SylixOS/net/lwip/lwip_fix.c
+++ b/SylixOS/net/lwip/lwip_fix.c
@@ -60,6 +60,7 @@
 #if LW_CFG_NET_EN > 0
 #include "lwip_config.h"
 #include "lwip_fix.h"
+#include "lwip_hook.h"
 #include "lwip/debug.h"
 #include "lwip/def.h"
 #include "lwip/sys.h"
@@ -85,6 +86,7 @@
 #include "netif/ppp/pppapi.h"
 #endif                                                                  /*  PPP_SUPPORT > 0 ||          */
                                                                         /*  PPPOE_SUPPORT > 0           */
+#include "sys/random.h"
 /*********************************************************************************************************
   版本判断 (警告!!! 低版本 lwip 系统将不再支持)
 *********************************************************************************************************/
@@ -117,8 +119,15 @@ static void sys_thread_sem_fini(LW_OBJECT_HANDLE  id);
 *********************************************************************************************************/
 void  sys_init (void)
 {
+    u8_t   iv[16];
+    time_t now;
+
     LW_SPIN_INIT(&_G_slcaLwip.SLCA_sl);                                 /*  初始化网络关键区域自旋锁    */
 
+    lib_time(&now);
+    getrandom(iv, sizeof(iv), GRND_NONBLOCK);
+    tcp_isn_init(&now, iv);                                             /*  初始化 TCP ISN 生成器       */
+
 #if LW_CFG_NET_SAFE > 0
 #if LW_CFG_NET_SAFE_LAZY == 0
     API_SystemHookAdd(sys_thread_sem_init, LW_OPTION_THREAD_CREATE_HOOK);
diff --git a/SylixOS/net/lwip/lwip_hook.h b/SylixOS/net/lwip/lwip_hook.h
index 20ff4ec..42ade7a 100644
--- a/SylixOS/net/lwip/lwip_hook.h
+++ b/SylixOS/net/lwip/lwip_hook.h
@@ -29,8 +29,9 @@
 *********************************************************************************************************/
 
 #if LW_CFG_LWIP_TCP_SIG_EN > 0
-#include "tcpsig/tcp_md5.h"
+#include "tcpext/tcp_md5.h"
 #endif
+#include "tcpext/tcp_isn.h"
 #if LW_CFG_NET_MROUTER > 0
 #include "netinet/in.h"
 #include "netinet/ip_mroute.h"
diff --git a/SylixOS/net/lwip/src/core/ipv4/ip4_frag.c b/SylixOS/net/lwip/src/core/ipv4/ip4_frag.c
index b3243c4..9b57f46 100644
--- a/SylixOS/net/lwip/src/core/ipv4/ip4_frag.c
+++ b/SylixOS/net/lwip/src/core/ipv4/ip4_frag.c
@@ -525,7 +525,11 @@ ip4_reass(struct pbuf *p)
   offset = IPH_OFFSET_BYTES(fraghdr);
   len = lwip_ntohs(IPH_LEN(fraghdr));
   hlen = IPH_HL_BYTES(fraghdr);
+#ifdef SYLIXOS /* SylixOS Reject 0-length fragments */
+  if (hlen >= len) {
+#else
   if (hlen > len) {
+#endif
     /* invalid datagram */
     goto nullreturn;
   }
diff --git a/SylixOS/net/lwip/src/core/ipv6/ip6_frag.c b/SylixOS/net/lwip/src/core/ipv6/ip6_frag.c
index 6617e0d..d23254d 100644
--- a/SylixOS/net/lwip/src/core/ipv6/ip6_frag.c
+++ b/SylixOS/net/lwip/src/core/ipv6/ip6_frag.c
@@ -301,7 +301,11 @@ ip6_reass(struct pbuf *p)
   LWIP_ASSERT("not a valid pbuf (ip6_input check missing?)", hdrdiff >= IP6_HLEN);
   hdrdiff -= IP6_HLEN;
   hdrdiff += IP6_FRAG_HLEN;
+#ifdef SYLIXOS /* SylixOS Reject 0-length fragments */
+  if (hdrdiff >= len) {
+#else
   if (hdrdiff > len) {
+#endif
     IP6_FRAG_STATS_INC(ip6_frag.proterr);
     goto nullreturn;
   }
diff --git a/SylixOS/net/lwip/src/core/tcp.c b/SylixOS/net/lwip/src/core/tcp.c
index b90b519..9b30c11 100644
--- a/SylixOS/net/lwip/src/core/tcp.c
+++ b/SylixOS/net/lwip/src/core/tcp.c
@@ -2328,12 +2328,17 @@ tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb)
 u32_t
 tcp_next_iss(struct tcp_pcb *pcb)
 {
+  static u32_t iss = 6510;
 #ifdef LWIP_HOOK_TCP_ISN
   LWIP_ASSERT("tcp_next_iss: invalid pcb", pcb != NULL);
+#ifdef SYLIXOS /* Loopback network trust */
+  if (ip_addr_isloopback(&pcb->local_ip) && ip_addr_isloopback(&pcb->remote_ip)) {
+    iss += tcp_ticks; /* Fast get trust link iss */
+    return iss;
+  }
+#endif /* SYLIXOS */
   return LWIP_HOOK_TCP_ISN(&pcb->local_ip, pcb->local_port, &pcb->remote_ip, pcb->remote_port);
 #else /* LWIP_HOOK_TCP_ISN */
-  static u32_t iss = 6510;
-
   LWIP_ASSERT("tcp_next_iss: invalid pcb", pcb != NULL);
   LWIP_UNUSED_ARG(pcb);
 
diff --git a/SylixOS/net/lwip/tcpext/tcp_isn.c b/SylixOS/net/lwip/tcpext/tcp_isn.c
new file mode 100644
index 0000000..09ffe25
--- /dev/null
+++ b/SylixOS/net/lwip/tcpext/tcp_isn.c
@@ -0,0 +1,176 @@
+/**
+ * @file
+ *
+ * Reference implementation of the TCP ISN algorithm standardized in RFC 6528.
+ * Produce TCP Initial Sequence Numbers by combining an MD5-generated hash
+ * based on the new TCP connection's identity and a stable secret, with the
+ * current time at 4-microsecond granularity.
+ *
+ * Specifically, the implementation uses MD5 to compute a hash of the input
+ * buffer, which contains both the four-tuple of the new TCP connection (local
+ * and remote IP address and port), as well as a 16-byte secret to make the
+ * results unpredictable to external parties.  The secret must be given at
+ * initialization time and should ideally remain the same across system
+ * reboots.  To be sure: the spoofing-resistance of the resulting ISN depends
+ * mainly on the strength of the supplied secret!
+ *
+ * The implementation takes 32 bits from the computed hash, and adds to it the
+ * current time, in 4-microsecond units.  The current time is computed from a
+ * boot time given at initialization, and the current uptime as provided by
+ * sys_now().  Thus, it assumes that sys_now() returns a time value that is
+ * relative to the boot time, i.e., that it starts at 0 at system boot, and
+ * only ever increases monotonically.
+ *
+ * For efficiency reasons, a single MD5 input buffer is used, and partially
+ * filled in at initialization time.  Specifically, of this 64-byte buffer, the
+ * first 36 bytes are used for the four-way TCP tuple data, followed by the
+ * 16-byte secret, followed by 12-byte zero padding.  The 64-byte size of the
+ * buffer should achieve the best performance for the actual MD5 computation.
+ *
+ * Basic usage:
+ *
+ * 1. in your lwipopts.h, add the following lines:
+ *
+ *    #include <lwip/arch.h>
+ *    struct ip_addr;
+ *    u32_t lwip_hook_tcp_isn(const struct ip_addr *local_ip, u16_t local_port,
+ *      const struct ip_addr *remote_ip, u16_t remote_port);
+ *   "#define LWIP_HOOK_TCP_ISN lwip_hook_tcp_isn";
+ *
+ * 2. from your own code, call lwip_init_tcp_isn() at initialization time, with
+ *    appropriate parameters.
+ */
+
+/*
+ * Copyright (c) 2016 The MINIX 3 Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: David van Moolenbroek <david@minix3.org>
+ */
+
+#include "tcp_isn.h"
+#include "lwip/ip_addr.h"
+#include "lwip/sys.h"
+#include <string.h>
+
+#ifdef LWIP_HOOK_TCP_ISN
+
+#include "mbedtls/md5.h"
+
+static u8_t input[64];
+static u32_t base_time;
+
+/**
+ * Initialize the TCP ISN module, with the boot time and a secret.
+ *
+ * @param boot_time Wall clock boot time of the system, in seconds.
+ * @param secret_16_bytes A 16-byte secret used to randomize the TCP ISNs.
+ */
+void
+tcp_isn_init(time_t *boot_time, const u8_t *secret_16_bytes)
+{
+  /* Initialize the input buffer with the secret and trailing zeroes. */
+  memset(input, 0, sizeof(input));
+
+  MEMCPY(&input[36], secret_16_bytes, 16);
+
+  /* Save the boot time in 4-us units. Overflow is no problem here. */
+  base_time = (u32_t)(*boot_time * 250000);
+}
+
+/**
+ * Hook to generate an Initial Sequence Number (ISN) for a new TCP connection.
+ *
+ * @param local_ip The local IP address.
+ * @param local_port The local port number, in host-byte order.
+ * @param remote_ip The remote IP address.
+ * @param remote_port The remote port number, in host-byte order.
+ * @return The ISN to use for the new TCP connection.
+ */
+u32_t
+tcp_isn_hook(const ip_addr_t *local_ip, u16_t local_port,
+    const ip_addr_t *remote_ip, u16_t remote_port)
+{
+  mbedtls_md5_context ctx;
+  u8_t output[16];
+  u32_t isn;
+
+#if LWIP_IPV4 && LWIP_IPV6
+  if (IP_IS_V6(local_ip))
+#endif /* LWIP_IPV4 && LWIP_IPV6 */
+#if LWIP_IPV6
+  {
+    const ip6_addr_t *local_ip6, *remote_ip6;
+
+    local_ip6  = ip_2_ip6(local_ip);
+    remote_ip6 = ip_2_ip6(remote_ip);
+
+    SMEMCPY(&input[0],  &local_ip6->addr,  16);
+    SMEMCPY(&input[16], &remote_ip6->addr, 16);
+  }
+#endif /* LWIP_IPV6 */
+#if LWIP_IPV4 && LWIP_IPV6
+  else
+#endif /* LWIP_IPV4 && LWIP_IPV6 */
+#if LWIP_IPV4
+  {
+    const ip4_addr_t *local_ip4, *remote_ip4;
+
+    local_ip4  = ip_2_ip4(local_ip);
+    remote_ip4 = ip_2_ip4(remote_ip);
+
+    /* Represent IPv4 addresses as IPv4-mapped IPv6 addresses, to ensure that
+     * the IPv4 and IPv6 address spaces are completely disjoint. */
+    memset(&input[0], 0, 10);
+    input[10] = 0xff;
+    input[11] = 0xff;
+    SMEMCPY(&input[12], &local_ip4->addr, 4);
+    memset(&input[16], 0, 10);
+    input[26] = 0xff;
+    input[27] = 0xff;
+    SMEMCPY(&input[28], &remote_ip4->addr, 4);
+  }
+#endif /* LWIP_IPV4 */
+
+  input[32] = (u8_t)(local_port >> 8);
+  input[33] = (u8_t)(local_port & 0xff);
+  input[34] = (u8_t)(remote_port >> 8);
+  input[35] = (u8_t)(remote_port & 0xff);
+
+  /* The secret and padding are already filled in. */
+
+  /* Generate the hash, using MD5. */
+  mbedtls_md5_starts(&ctx);
+  mbedtls_md5_update(&ctx, input, sizeof(input));
+  mbedtls_md5_finish(&ctx, output);
+
+  /* Arbitrarily take the first 32 bits from the generated hash. */
+  MEMCPY(&isn, output, sizeof(isn));
+
+  /* Add the current time in 4-microsecond units. */
+  return isn + base_time + sys_now() * 250;
+}
+
+#endif /* LWIP_HOOK_TCP_ISN */
diff --git a/SylixOS/net/lwip/tcpext/tcp_isn.h b/SylixOS/net/lwip/tcpext/tcp_isn.h
new file mode 100644
index 0000000..b5b6809
--- /dev/null
+++ b/SylixOS/net/lwip/tcpext/tcp_isn.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2016 The MINIX 3 Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: David van Moolenbroek <david@minix3.org>
+ */
+
+#ifndef LWIP_HDR_CONTRIB_ADDONS_TCP_ISN_H
+#define LWIP_HDR_CONTRIB_ADDONS_TCP_ISN_H
+
+#include "lwip/opt.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void  tcp_isn_init(time_t *boot_time, const u8_t *secret_16_bytes);
+u32_t tcp_isn_hook(const ip_addr_t *local_ip, u16_t local_port,
+                   const ip_addr_t *remote_ip, u16_t remote_port);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_CONTRIB_ADDONS_TCP_ISN_H */
diff --git a/SylixOS/net/lwip/tcpsig/tcp_md5.c b/SylixOS/net/lwip/tcpext/tcp_md5.c
index d7e8c1b..d7e8c1b 100644
--- a/SylixOS/net/lwip/tcpsig/tcp_md5.c
+++ b/SylixOS/net/lwip/tcpext/tcp_md5.c
diff --git a/SylixOS/net/lwip/tcpsig/tcp_md5.h b/SylixOS/net/lwip/tcpext/tcp_md5.h
index 0947361..0947361 100644
--- a/SylixOS/net/lwip/tcpsig/tcp_md5.h
+++ b/SylixOS/net/lwip/tcpext/tcp_md5.h