增加所有文件

middleware/lwip/contrib/ports/baremetal/include/arch/cc.h

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * 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.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmdit <goldsimon@gmx.de>
+ *
+ */
+#ifndef LWIP_ARCH_CC_H
+#define LWIP_ARCH_CC_H
+
+#if __GNUC__
+
+#define LWIP_TIMEVAL_PRIVATE 0
+#if __SES_ARM
+#include <sys/time.h>
+#else
+#include <sys/_timeval.h>
+#endif
+
+#elif __ICCARM__
+#define LWIP_TIMEVAL_PRIVATE 1
+#endif
+
+#define U16_F "u"
+#define S16_F "d"
+#define X16_F "x"
+#define U32_F "u"
+#define S32_F "d"
+#define X32_F "x"
+#define SZT_F "zu"
+
+#define printf printf_
+extern int printf_(const char* format, ...);
+
+#define LWIP_NO_UNISTD_H    1
+
+#define LWIP_CHKSUM_ALGORITHM   2
+#define LWIP_PLATFORM_DIAG(x)   do {printf x;} while (0)
+#define LWIP_PLATFORM_ASSERT(x) do {printf(x); while(1);} while (0)
+
+//typedef int ssize_t;
+
+#endif /* LWIP_ARCH_CC_H */

middleware/lwip/contrib/ports/baremetal/include/arch/sys_arch.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * 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.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmdit <goldsimon@gmx.de>
+ *
+ */
+#ifndef LWIP_ARCH_SYS_ARCH_H
+#define LWIP_ARCH_SYS_ARCH_H
+
+#define MBOX_MAGIC  'mbox'
+#define SEM_MAGIC   'sem'
+
+typedef void *sys_thread_t;
+
+typedef void *sys_mutex_t;
+
+typedef void *sys_sem_t;
+
+typedef void *sys_mbox_t;
+
+#endif /* LWIP_ARCH_SYS_ARCH_H */

middleware/lwip/contrib/ports/baremetal/include/lwipopts.h

@@ -0,0 +1,122 @@
+/**
+ * @file
+ *
+ * lwIP Options Configuration
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * 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.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef LWIP_LWIPOPTS_H
+#define LWIP_LWIPOPTS_H
+
+#define NO_SYS 1
+
+#define LWIP_NETCONN                    0
+#define LWIP_SOCKET                     0
+
+/*
+ * Include user defined options first. Anything not defined in these files
+ * will be set to standard values. Override anything you don't like!
+ */
+
+// use libc malloc
+#define MEM_LIBC_MALLOC 0
+#define MEMP_USE_CUSTOM_POOLS 1
+#define MEM_USE_POOLS 1
+// Create static memory pools
+#define MEMP_MEM_MALLOC 0
+/* Memory block size alignes to 4 bytes, because ARM may access memory block
+ * by using ldrd/strd instruction which needs 4 bytes alignment
+ */
+#define MEM_ALIGNMENT   4
+
+// these don't actually affect anything
+// unless MEMP_MEM_MALLOC is 0
+#define MEM_SIZE (16 * 1024)
+#define MEMP_NUM_UDP_PCB 128
+#define MEMP_NUM_TCP_PCB 128
+#define MEMP_NUM_TCP_PCB_LISTEN 128
+#define MEMP_NUM_NETBUF 32
+#define MEMP_NUM_NETCONN 32
+#define MEMP_NUM_NETDB 32
+
+#define LWIP_COMPAT_SOCKETS 1
+#define LWIP_SO_RCVTIMEO    1
+#define LWIP_SO_RCVBUF      1
+
+#define LWIP_DHCP 0
+#define LWIP_AUTOIP 0
+#define LWIP_DHCP_AUTOIP_COOP 0
+
+#define LWIP_DNS 0
+
+#define LWIP_NETIF_HOSTNAME 1
+#define LWIP_NETIF_STATUS_CALLBACK 1
+#define LWIP_NETIF_HWADDRHINT 1
+#define LWIP_NETIF_LOOPBACK 1
+
+#define LWIP_HAVE_LOOPIF 1
+
+#define TCPIP_THREAD_STACKSIZE 4096
+#define TCPIP_THREAD_PRIO osPriorityRealtime
+
+#define TCPIP_MBOX_SIZE 16
+
+#define DEFAULT_THREAD_PRIO (osPriorityNormal - 1)
+#define DEFAULT_THREAD_STACKSIZE 4096
+
+#define DEFAULT_RAW_RECVMBOX_SIZE 16
+#define DEFAULT_UDP_RECVMBOX_SIZE 16
+#define DEFAULT_TCP_RECVMBOX_SIZE 16
+#define DEFAULT_ACCEPTMBOX_SIZE 16
+
+#define LWIP_STATS_DISPLAY 1
+#define LWIP_ERRNO_STDINCLUDE
+#define SYS_LIGHTWEIGHT_PROT 0
+#define LWIP_DEBUG 1
+
+#define LWIP_RAW 1
+
+#define MEMP_NUM_SYS_TIMEOUT 17
+
+//#define PBUF_DEBUG  LWIP_DBG_ON
+//#define TCP_OUTPUT_DEBUG    LWIP_DBG_ON
+//#define LWIP_DBG_MIN_LEVEL 0
+
+/* TCP Maximum segment size. */
+#define TCP_MSS                 1460
+
+#define TCP_SND_BUF             (12 * TCP_MSS)
+#define TCP_SND_QUEUELEN        80
+#define MEMP_NUM_TCP_SEG        TCP_SND_QUEUELEN
+
+#endif /* LWIP_LWIPOPTS_H */

middleware/lwip/contrib/ports/baremetal/include/netdev.h

@@ -0,0 +1,51 @@
+#ifndef NET_DEV_H_
+#define NET_DEV_H_
+
+#include <lwip/opt.h>
+#include <lwip/netif.h>
+#include <lwip/pbuf.h>
+#include <lwip/err.h>
+
+struct net_driver_s;
+
+/* Link layer type.  This type is used with netdev_register in order to
+ * identify the type of the network driver.
+ */
+
+enum net_lltype_e {
+  NET_LL_ETHERNET = 0, /* Ethernet */
+  NET_LL_LOOPBACK,     /* Local loopback */
+  NET_LL_SLIP,         /* Serial Line Internet Protocol (SLIP) */
+  NET_LL_TUN,          /* TUN Virtual Network Device */
+  NET_LL_BLUETOOTH,    /* Bluetooth */
+  NET_LL_IEEE80211,    /* IEEE 802.11 */
+  NET_LL_IEEE802154,   /* IEEE 802.15.4 MAC */
+  NET_LL_PKTRADIO      /* Non-standard packet radio */
+};
+
+struct net_driver_s {
+  struct netif d_netif;
+  u8_t d_lltype; /* See enum net_lltype_e */
+
+  /** IP address configuration in network byte order */
+  ip_addr_t d_ipaddr;
+  ip_addr_t d_netmask;
+  ip_addr_t d_gateway;
+
+  err_t (*d_init)(struct net_driver_s *dev);
+  err_t (*d_txavail)(struct net_driver_s *dev, struct pbuf *p);
+  u32_t (*d_getmac)(struct net_driver_s *dev, void *buf, u32_t max_len);
+  u32_t (*d_getmtu)(struct net_driver_s *dev);
+
+  void *d_private;
+};
+
+err_t netdev_register(struct net_driver_s *dev, enum net_lltype_e lltype);
+
+static inline void netdev_input(struct net_driver_s *dev, struct pbuf *p) {
+  if (dev->d_netif.input(p, &dev->d_netif) != ERR_OK) {
+    pbuf_free(p);
+  }
+}
+
+#endif /* NET_DEV_H_ */

middleware/lwip/contrib/ports/baremetal/net_tool.c

@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2013 Corey Tabaka
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <lwip/api.h>
+#include <lwip/ip_addr.h>
+#include <lwip/netif.h>
+#include <lwip/inet.h>
+#include <lwip/stats.h>
+#include <lwip/timeouts.h>
+#include <apps/ping/ping.h>
+#include "lwip/apps/lwiperf.h"
+#include "CLI.h"
+#include "debug.h"
+
+static void
+lwiperf_report(void *arg, enum lwiperf_report_type report_type,
+               const ip_addr_t* local_addr, u16_t local_port, const ip_addr_t* remote_addr, u16_t remote_port,
+               u32_t bytes_transferred, u32_t ms_duration, u32_t bandwidth_kbitpsec)
+{
+    LWIP_UNUSED_ARG(arg);
+    LWIP_UNUSED_ARG(local_addr);
+    LWIP_UNUSED_ARG(local_port);
+
+    printf("IPERF report: type=%d, remote: %s:%d, total bytes: %"U32_F", duration in ms: %"U32_F", kbits/s: %"U32_F"\n",
+        (int)report_type, ipaddr_ntoa(remote_addr), (int)remote_port, bytes_transferred, ms_duration, bandwidth_kbitpsec);
+}
+
+static int net_cmd(int argc, char *argv[])
+{
+    if (argc < 1) {
+        printf("net commands:\n");
+        printf("net ifconfig\n");
+        printf("net stats\n");
+        printf("net ping <ip>\n");
+        printf("net iperf <server | client> [ip]\n");
+        goto out;
+    }
+
+    if (!strcmp(argv[0], "ifconfig")) {
+        struct netif *netif = NULL;
+
+        if (argc == 1) {
+            NETIF_FOREACH(netif) {
+                printf("%s%d\n", netif->name, netif->num);
+                printf("\tHwaddr:\t%02X:%02X:%02X:%02X:%02X:%02X\n",
+                    netif->hwaddr[0], netif->hwaddr[1], netif->hwaddr[2],
+                    netif->hwaddr[3], netif->hwaddr[4], netif->hwaddr[5]);
+                printf("\tIPaddr:\t%u.%u.%u.%u\n",
+                    ip4_addr1_16(&netif->ip_addr),
+                    ip4_addr2_16(&netif->ip_addr),
+                    ip4_addr3_16(&netif->ip_addr),
+                    ip4_addr4_16(&netif->ip_addr));
+                printf("\tMask:\t%u.%u.%u.%u\n",
+                    ip4_addr1_16(&netif->netmask),
+                    ip4_addr2_16(&netif->netmask),
+                    ip4_addr3_16(&netif->netmask),
+                    ip4_addr4_16(&netif->netmask));
+                printf("\tMTU:\t%d\n", netif->mtu);
+            }
+        }
+        else if (argc > 2) {
+            netif = netif_find(argv[1]);
+
+            if (!netif) {
+                printf("Invalid network card\n");
+                goto out;
+            }
+
+            if (!strcmp(argv[2], "down")) {
+                netif_set_down(netif);
+            }
+            else if (!strcmp(argv[2], "up")) {
+                netif_set_default(netif);
+                netif_set_up(netif);
+            }
+            else {
+                ip4_addr_t ip;
+                if (!inet_aton(argv[2], &ip)) {
+                    printf("net ifconfig <net card> <up/down/ip>\n");
+                }
+                else {
+                    ip4_addr_t gw;
+                    IP4_ADDR(&gw, ip4_addr1_16(&ip),
+                             ip4_addr2_16(&ip), ip4_addr3_16(&ip), 1);
+                    netif_set_ipaddr(netif, &ip);
+                    netif_set_gw(netif, &gw);
+                }
+                goto out;
+            }
+        }
+    }
+#if LWIP_STATS
+    else if (!strcmp(argv[0], "stats")) {
+        stats_display();
+    }
+#endif
+    else if (!strcmp(argv[0], "ping")) {
+        static ip_addr_t ip_addr;
+        ip4_addr_t ip4_addr;
+
+        if (argc < 2) {
+            printf("net ping <IPaddress>\n");
+            printf("for example:\n");
+            printf("net ping 192.168.10.11\n");
+            goto out;
+        }
+
+        if (inet_aton(argv[1], &ip4_addr) == 0) {
+            printf("ipaddr %s is wrong\n", argv[1]);
+            goto out;
+        }
+
+        ip_addr_copy_from_ip4(ip_addr, ip4_addr);
+        ping_init(&ip_addr);
+    }
+    else if (!strcmp(argv[0], "iperf")) {
+        if (argc < 2) {
+            printf("for example:\n");
+            printf("net iperf server\n");
+            printf("net iperf client 192.168.10.20\n");
+            goto out;
+        }
+
+        if (!strcmp(argv[1], "server")) {
+            lwiperf_start_tcp_server_default(lwiperf_report, NULL);
+        }
+        else if (!strcmp(argv[1], "client")) {
+            if (argc < 3) {
+                printf("missing ip addr\n");
+                goto out;
+            }
+
+            static ip_addr_t ip_addr;
+            ip4_addr_t ip4_addr;
+
+            if (inet_aton(argv[2], &ip4_addr) == 0) {
+                printf("ipaddr %s is wrong\n", argv[2]);
+                goto out;
+            }
+
+            ip_addr_copy_from_ip4(ip_addr, ip4_addr);
+            lwiperf_start_tcp_client_default(&ip_addr, lwiperf_report, NULL);
+        }
+        else {
+            printf("cmd error: net iperf %s\n", argv[1]);
+        }
+    }
+
+out:
+    return 0;
+}
+
+CLI_CMD("net", "\r\nnet:\r\n net toolbox\r\n", net_cmd);

middleware/lwip/contrib/ports/baremetal/netdev.c

@@ -0,0 +1,64 @@
+#include <types.h>
+#include <netdev.h>
+#include <lwip/debug.h>
+#include <lwip/def.h>
+#include <lwip/tcpip.h>
+#include <lwip/etharp.h>
+
+static err_t netdev_linkoutput_fn(struct netif *netif, struct pbuf *p)
+{
+  struct net_driver_s *dev;
+
+  dev = (struct net_driver_s *)netif->state;
+
+  return dev->d_txavail ? dev->d_txavail(dev, p) : ERR_IF;
+}
+
+static err_t netdev_init_fn(struct netif *netif)
+{
+  struct net_driver_s *dev;
+
+  netif->output = etharp_output;
+  netif->linkoutput = netdev_linkoutput_fn;
+
+  dev = (struct net_driver_s *)netif->state;
+
+  if (dev->d_getmac) {
+    netif->hwaddr_len = (u8_t)(dev->d_getmac(dev, netif->hwaddr, sizeof(netif->hwaddr)));
+  }
+
+  if (dev->d_getmtu) {
+    netif->mtu = (u16_t)(dev->d_getmtu(dev));
+  }
+
+  if (dev->d_lltype == NET_LL_ETHERNET) {
+    netif->name[0] = 'e';
+    netif->name[1] = 'n';
+    netif->num = 0;
+    netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
+  }
+
+  if (dev->d_init) {
+    dev->d_init(dev);
+  }
+
+  return ERR_OK;
+}
+
+err_t netdev_register(struct net_driver_s *dev, enum net_lltype_e lltype)
+{
+  LWIP_ASSERT("netdev_register: dev is NULL", dev != NULL);
+
+  dev->d_lltype = (u8_t)lltype;
+
+  netif_add(&dev->d_netif,
+            ip_2_ip4(&dev->d_ipaddr),
+            ip_2_ip4(&dev->d_netmask),
+            ip_2_ip4(&dev->d_gateway),
+            dev, netdev_init_fn, netif_input);
+
+  netif_set_default(&dev->d_netif);
+  netif_set_up(&dev->d_netif);
+
+  return ERR_OK;
+}

middleware/lwip/contrib/ports/baremetal/sys_arch.c

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * 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.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmdit <goldsimon@gmx.de>
+ *
+ */
+#include <lwip/arch.h>
+
+extern uint32_t current_time(void);
+
+void sys_init(void)
+{
+}
+
+u32_t sys_now(void)
+{
+  return current_time();
+}