Verify OP_Ack size & fix crash in BasePacket::build_raw_header_dump due to uninitialised timestamp

common/BasePacket.cpp

@@ -28,6 +28,7 @@ BasePacket::BasePacket(const unsigned char *buf, uint32 len)
 	this->size=0;
 	this->_wpos = 0;
 	this->_rpos = 0;
+	this->timestamp.tv_sec = 0;
 	if (len>0) {
 		this->size=len;
 		pBuffer= new unsigned char[len];

common/EQStream.cpp

@@ -284,6 +284,11 @@ uint32 processed=0,subpacket_length=0;
 		}
 		break;
 		case OP_Ack: {
+			if(!p->pBuffer || (p->Size() < 4))
+			{
+				_log(NET__ERROR, _L "Received OP_Ack that was of malformed size" __L);
+				break;
+			}
 #ifndef COLLECTOR
 			uint16 seq=ntohs(*(uint16 *)(p->pBuffer));
 			AckPackets(seq);