初始化版本

lwip/lwip-2.2.1/contrib/examples/tftp/tftp_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 <stdio.h>
+
+#include "lwip/apps/tftp_client.h"
+#include "lwip/apps/tftp_server.h"
+#include "tftp_example.h"
+
+#include <string.h>
+
+#if LWIP_UDP
+
+/* Define a base directory for TFTP access
+ * ATTENTION: This code does NOT check for sandboxing,
+ * i.e. '..' in paths is not checked! */
+#ifndef LWIP_TFTP_EXAMPLE_BASE_DIR
+#define LWIP_TFTP_EXAMPLE_BASE_DIR ""
+#endif
+
+/* Define this to a file to get via tftp client */
+#ifndef LWIP_TFTP_EXAMPLE_CLIENT_FILENAME
+#define LWIP_TFTP_EXAMPLE_CLIENT_FILENAME "test.bin"
+#endif
+
+/* Define this to a server IP string */
+#ifndef LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP
+#define LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP "192.168.0.1"
+#endif
+
+static char full_filename[256];
+
+static void *
+tftp_open_file(const char* fname, u8_t is_write)
+{
+  snprintf(full_filename, sizeof(full_filename), "%s%s", LWIP_TFTP_EXAMPLE_BASE_DIR, fname);
+  full_filename[sizeof(full_filename)-1] = 0;
+
+  if (is_write) {
+    return (void*)fopen(full_filename, "wb");
+  } else {
+    return (void*)fopen(full_filename, "rb");
+  }
+}
+
+static void*
+tftp_open(const char* fname, const char* mode, u8_t is_write)
+{
+  LWIP_UNUSED_ARG(mode);
+  return tftp_open_file(fname, is_write);
+}
+
+static void
+tftp_close(void* handle)
+{
+  fclose((FILE*)handle);
+}
+
+static int
+tftp_read(void* handle, void* buf, int bytes)
+{
+  int ret = fread(buf, 1, bytes, (FILE*)handle);
+  if (ret <= 0) {
+    return -1;
+  }
+  return ret;
+}
+
+static int
+tftp_write(void* handle, struct pbuf* p)
+{
+  while (p != NULL) {
+    if (fwrite(p->payload, 1, p->len, (FILE*)handle) != (size_t)p->len) {
+      return -1;
+    }
+    p = p->next;
+  }
+
+  return 0;
+}
+
+/* For TFTP client only */
+static void
+tftp_error(void* handle, int err, const char* msg, int size)
+{
+  char message[100];
+
+  LWIP_UNUSED_ARG(handle);
+
+  memset(message, 0, sizeof(message));
+  MEMCPY(message, msg, LWIP_MIN(sizeof(message)-1, (size_t)size));
+
+  printf("TFTP error: %d (%s)", err, message);
+}
+
+static const struct tftp_context tftp = {
+  tftp_open,
+  tftp_close,
+  tftp_read,
+  tftp_write,
+  tftp_error
+};
+
+void
+tftp_example_init_server(void)
+{
+  tftp_init_server(&tftp);
+}
+
+void
+tftp_example_init_client(void)
+{
+  void *f;
+  err_t err;
+  ip_addr_t srv;
+  int ret = ipaddr_aton(LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP, &srv);
+  LWIP_ASSERT("ipaddr_aton failed", ret == 1);
+  LWIP_UNUSED_ARG(ret);
+
+  err = tftp_init_client(&tftp);
+  LWIP_ASSERT("tftp_init_client failed", err == ERR_OK);
+
+  f = tftp_open_file(LWIP_TFTP_EXAMPLE_CLIENT_FILENAME, 1);
+  LWIP_ASSERT("failed to create file", f != NULL);
+
+  err = tftp_get(f, &srv, TFTP_PORT, LWIP_TFTP_EXAMPLE_CLIENT_FILENAME, TFTP_MODE_OCTET);
+  LWIP_ASSERT("tftp_get failed", err == ERR_OK);
+}
+
+#endif /* LWIP_UDP */

lwip/lwip-2.2.1/contrib/examples/tftp/tftp_example.h

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+/* 
+ * File:   tftp_example.h
+ * Author: dziegel
+ *
+ * Created on February 17, 2018, 3:43 PM
+ */
+
+#ifndef TFTP_EXAMPLE_H
+#define TFTP_EXAMPLE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void tftp_example_init_server(void);
+void tftp_example_init_client(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* TFTP_EXAMPLE_H */
+