Add Channel Mask TLV CLI support (#549)

- Add a new Dataset::Set method to support variable TLV data payload. This is mainly for Channel Mask TLV
- Add CLI to support Channel Mask TLV

src/cli/cli_dataset.cpp

@@ -55,6 +55,7 @@ const DatasetCommand Dataset::sCommands[] =
     { "active", &ProcessActive },
     { "activetimestamp", &ProcessActiveTimestamp },
     { "channel", &ProcessChannel },
+    { "channelmask", &ProcessChannelMask },
     { "clear", &ProcessClear },
     { "commit", &ProcessCommit },
     { "delay", &ProcessDelay },
@@ -99,6 +100,11 @@ ThreadError Dataset::Print(otOperationalDataset &aDataset)
         sServer->OutputFormat("Channel: %d\r\n", aDataset.mChannel);
     }
 
+    if (aDataset.mIsChannelMaskPage0Set)
+    {
+        sServer->OutputFormat("Channel Mask Page 0: %x\r\n", aDataset.mChannelMaskPage0);
+    }
+
     if (aDataset.mIsDelaySet)
     {
         sServer->OutputFormat("Delay: %d\r\n", aDataset.mDelay);
@@ -261,6 +267,21 @@ exit:
     return error;
 }
 
+ThreadError Dataset::ProcessChannelMask(otInstance *aInstance, int argc, char *argv[])
+{
+    ThreadError error = kThreadError_None;
+    long value;
+
+    VerifyOrExit(argc > 0, error = kThreadError_Parse);
+    SuccessOrExit(error = Interpreter::ParseLong(argv[0], value));
+    sDataset.mChannelMaskPage0 = static_cast<uint32_t>(value);
+    sDataset.mIsChannelMaskPage0Set = true;
+    (void)aInstance;
+
+exit:
+    return error;
+}
+
 ThreadError Dataset::ProcessClear(otInstance *aInstance, int argc, char *argv[])
 {
     memset(&sDataset, 0, sizeof(sDataset));

src/cli/cli_dataset.hpp

@@ -77,6 +77,7 @@ private:
     static ThreadError ProcessActive(otInstance *aInstance, int argc, char *argv[]);
     static ThreadError ProcessActiveTimestamp(otInstance *aInstance, int argc, char *argv[]);
     static ThreadError ProcessChannel(otInstance *aInstance, int argc, char *argv[]);
+    static ThreadError ProcessChannelMask(otInstance *aInstance, int argc, char *argv[]);
     static ThreadError ProcessClear(otInstance *aInstance, int argc, char *argv[]);
     static ThreadError ProcessCommit(otInstance *aInstance, int argc, char *argv[]);
     static ThreadError ProcessDelay(otInstance *aInstance, int argc, char *argv[]);