2 files changed, 71 insertions, 0 deletions
diff --git a/shared-module/network/__init__.c b/shared-module/network/__init__.c
index e69de29bb..7e3b7fd26 100644
--- a/shared-module/network/__init__.c
+++ b/shared-module/network/__init__.c
@@ -0,0 +1,43 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Nick Moore
+ *
+ * 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 "py/mphal.h"
+
+#include "shared-bindings/random/__init__.h"
+
+void network_module_create_random_mac_address(uint8_t *mac) {
+    uint32_t rb1 = shared_modules_random_getrandbits(24);
+    uint32_t rb2 = shared_modules_random_getrandbits(24);
+    // first octet has multicast bit (0) cleared and local bit (1) set
+    // everything else is just set randomly
+    mac[0] = ((uint8_t)(rb1 >> 16) & 0xfe) | 0x02;
+    mac[1] = (uint8_t)(rb1 >> 8);
+    mac[2] = (uint8_t)(rb1);
+    mac[3] = (uint8_t)(rb2 >> 16);
+    mac[4] = (uint8_t)(rb2 >> 8);
+    mac[5] = (uint8_t)(rb2);
+}
+
diff --git a/shared-module/network/__init__.h b/shared-module/network/__init__.h
new file mode 100644
index 000000000..13f800fb0
--- /dev/null
+++ b/shared-module/network/__init__.h
@@ -0,0 +1,28 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Nick Moore
+ *
+ * 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.
+ */
+
+void network_module_create_random_mac_address(uint8_t *mac);
+