add nimble mesh example

need meshctl installed on raspberrypi. nimble offical samples have a lot of pit ...

components/encoding/base64/src/base64.c

@@ -0,0 +1,181 @@
+/*
+ * This file is based on roken from the FreeBSD source.  It has been modified
+ * to not use malloc() and instead expect static buffers, and tabs have been
+ * replaced with spaces.  Also, instead of strlen() on the resulting string,
+ * pointer arithmitic is done, as p represents the end of the buffer.
+ */
+
+/*
+ * Copyright (c) 1995-2001 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * 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. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <stdio.h>
+
+#include <base64/base64.h>
+
+static const char base64_chars[] =
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+static int
+pos(char c)
+{
+    const char *p;
+    for (p = base64_chars; *p; p++)
+        if (*p == c)
+            return p - base64_chars;
+    return -1;
+}
+
+int
+base64_encode(const void *data, int size, char *s, uint8_t should_pad)
+{
+    char *p;
+    int i;
+    int c;
+    const unsigned char *q;
+    char *last;
+    int diff;
+
+    p = s;
+
+    q = (const unsigned char *) data;
+    last = NULL;
+    i = 0;
+    while (i < size) {
+        c = q[i++];
+        c *= 256;
+        if (i < size)
+            c += q[i];
+        i++;
+        c *= 256;
+        if (i < size)
+            c += q[i];
+        i++;
+        p[0] = base64_chars[(c & 0x00fc0000) >> 18];
+        p[1] = base64_chars[(c & 0x0003f000) >> 12];
+        p[2] = base64_chars[(c & 0x00000fc0) >> 6];
+        p[3] = base64_chars[(c & 0x0000003f) >> 0];
+        last = p;
+        p += 4;
+    }
+
+    if (last) {
+        diff = i - size;
+        if (diff > 0) {
+            if (should_pad) {
+                memset(last + (4 - diff), '=', diff);
+            } else {
+                p = last + (4 - diff);
+            }
+        }
+    }
+
+    *p = 0;
+
+    return (p - s);
+}
+
+int
+base64_pad(char *buf, int len)
+{
+    int remainder;
+
+    remainder = len % 4;
+    if (remainder == 0) {
+        return (0);
+    }
+
+    memset(buf, '=', 4 - remainder);
+
+    return (4 - remainder);
+}
+
+#define DECODE_ERROR -1
+
+static unsigned int
+token_decode(const char *token)
+{
+    int i;
+    unsigned int val = 0;
+    int marker = 0;
+    if (strlen(token) < 4)
+        return DECODE_ERROR;
+    for (i = 0; i < 4; i++) {
+        val *= 64;
+        if (token[i] == '=')
+            marker++;
+        else if (marker > 0)
+            return DECODE_ERROR;
+        else
+            val += pos(token[i]);
+    }
+    if (marker > 2)
+        return DECODE_ERROR;
+    return (marker << 24) | val;
+}
+
+int
+base64_decode(const char *str, void *data)
+{
+    const char *p;
+    unsigned char *q;
+
+    q = data;
+    for (p = str; *p && (*p == '=' || strchr(base64_chars, *p)); p += 4) {
+        unsigned int val = token_decode(p);
+        unsigned int marker = (val >> 24) & 0xff;
+        if (val == DECODE_ERROR)
+            return -1;
+        *q++ = (val >> 16) & 0xff;
+        if (marker < 2)
+            *q++ = (val >> 8) & 0xff;
+        if (marker < 1)
+            *q++ = val & 0xff;
+    }
+    return q - (unsigned char *) data;
+}
+
+
+int
+base64_decode_len(const char *str)
+{
+    int len;
+
+    len = strlen(str);
+    while (len && str[len - 1] == '=') {
+        len--;
+    }
+    return len * 3 / 4;
+}