Implementation and fixes for Blimp client/engine E2E communication.

blimp/net/common.cc

Index: blimp/net/common.cc
diff --git a/blimp/net/common.cc b/blimp/net/common.cc
index 1663b300534f03ff610710b6d2630a5f7c04c427..7f66fce021280d40efde02117e82c4a23ba822c0 100644
--- a/blimp/net/common.cc
+++ b/blimp/net/common.cc
@@ -4,9 +4,21 @@
 
 #include "blimp/net/common.h"
 
+#include <iostream>
+
+#include "blimp/common/proto/blimp_message.pb.h"
+#include "net/base/ip_address_number.h"
+
 namespace blimp {
 
 const size_t kMaxPacketPayloadSizeBytes = 1 << 16;  // 64KB
 const size_t kPacketHeaderSizeBytes = 4;
 
+std::ostream& operator<<(std::ostream& out, const BlimpMessage& message) {
+  // TODO(kmarshall): Log type-specific contextual detail.
+  out << "<BlimpMessage type=" << message.type()
+      << ", size=" << message.ByteSize() << ">";
+  return out;
+}
+
 }  // namespace blimp