初始化版本

lwip/lwip-2.2.1/contrib/examples/sntp/sntp_example.c

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+/*
+ * 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: Dirk Ziegelmeier <dziegel@gmx.de>
+ *
+ */
+
+#include <time.h>
+
+#include "lwip/opt.h"
+#include "lwip/apps/sntp.h"
+#include "sntp_example.h"
+#include "lwip/netif.h"
+
+void
+sntp_set_system_time(u32_t sec)
+{
+  char buf[32];
+  struct tm current_time_val;
+  time_t current_time = (time_t)sec;
+
+#if defined(_WIN32) || defined(WIN32)
+  localtime_s(&current_time_val, &current_time);
+#else
+  localtime_r(&current_time, &current_time_val);
+#endif
+
+  strftime(buf, sizeof(buf), "%d.%m.%Y %H:%M:%S", &current_time_val);
+  LWIP_PLATFORM_DIAG(("SNTP time: %s\n", buf));
+}
+
+void
+sntp_example_init(void)
+{
+  sntp_setoperatingmode(SNTP_OPMODE_POLL);
+#if LWIP_DHCP
+  sntp_servermode_dhcp(1); /* get SNTP server via DHCP */
+#else /* LWIP_DHCP */
+#if LWIP_IPV4
+  sntp_setserver(0, netif_ip_gw4(netif_default));
+#endif /* LWIP_IPV4 */
+#endif /* LWIP_DHCP */
+  sntp_init();
+}