ignore "checkBandwidth" and "_checkbw" command,don't treat them as republish

@@ -990,6 +990,9 @@ int SrsRtmpConn::handle_publish_message(SrsSource* source, SrsCommonMessage* msg
             srs_error("fmle decode unpublish message failed. ret=%d", ret);
             return ret;
         }
+        if(NULL == pkt){
+        	return ret;//ignored packets,don't do republish
+        }
         SrsAutoFree(SrsPacket, pkt);
 
         // for flash, any packet is republish.

@@ -838,7 +838,11 @@ int SrsProtocol::do_decode_message(SrsMessageHeader& header, SrsStream* stream,
             srs_info("decode the AMF0/AMF3 closeStream message.");
             *ppacket = packet = new SrsCloseStreamPacket();
             return packet->decode(stream);
-        } else if (header.is_amf0_command() || header.is_amf3_command()) {
+        }else if (command == RTMP_AMF0_COMMAND_CHECKBANDWIDTH || command == RTMP_AMF0_COMMAND_CHECKBW) {
+        	//todo: process check bandwidth command,now drop it
+             return ret;
+        }
+        else if (header.is_amf0_command() || header.is_amf3_command()) {
             srs_info("decode the AMF0/AMF3 call message.");
             *ppacket = packet = new SrsCallPacket();
             return packet->decode(stream);

@@ -91,6 +91,8 @@ class IMergeReadHandler;
 #define RTMP_AMF0_COMMAND_PUBLISH               "publish"
 #define RTMP_AMF0_DATA_SAMPLE_ACCESS            "|RtmpSampleAccess"
 
+#define RTMP_AMF0_COMMAND_CHECKBANDWIDTH        "checkBandwidth"
+#define RTMP_AMF0_COMMAND_CHECKBW				"_checkbw"
 /**
  * the signature for packets to client.
  */