Add API to set the IEEE 802.15.4 Extended Address. (#289)

src/cli/README.md

@@ -185,7 +185,17 @@ Get the IEEE 802.15.4 Extended Address.
 
 ```bash
 > extaddr
-0xdead00beef00cafe
+dead00beef00cafe
+Done
+```
+
+### extaddr \<extaddr\>
+
+Set the IEEE 802.15.4 Extended Address.
+
+```bash
+> extaddr dead00beef00cafe
+dead00beef00cafe
 Done
 ```
 
@@ -195,7 +205,7 @@ Get the Thread Extended PAN ID value.
 
 ```bash
 > extpanid
-0xdead00beef00cafe
+dead00beef00cafe
 Done
 ```
 

src/cli/cli.cpp

@@ -386,11 +386,24 @@ exit:
 
 void Interpreter::ProcessExtAddress(int argc, char *argv[])
 {
-    OutputBytes(otGetExtendedAddress(), OT_EXT_ADDRESS_SIZE);
-    sServer->OutputFormat("\r\n");
-    AppendResult(kThreadError_None);
-    (void)argc;
-    (void)argv;
+    ThreadError error = kThreadError_None;
+
+    if (argc == 0)
+    {
+        OutputBytes(otGetExtendedAddress(), OT_EXT_ADDRESS_SIZE);
+        sServer->OutputFormat("\r\n");
+    }
+    else
+    {
+        otExtAddress extAddress;
+
+        VerifyOrExit(Hex2Bin(argv[0], extAddress.m8, sizeof(otExtAddress)) >= 0, error = kThreadError_Parse);
+
+        otSetExtendedAddress(&extAddress);
+    }
+
+exit:
+    AppendResult(error);
 }
 
 void Interpreter::ProcessExtPanId(int argc, char *argv[])