Prevent logging connection failure when mDNS client connects to test the connection.

PiperOrigin-RevId: 850545490

internal/platform/exception.h

@@ -32,6 +32,7 @@ struct Exception {
     kTimeout = 5,            // Operation did not finish within specified time.
     kIllegalCharacters = 6,  // File name or parent path contained
                              // illegal chars
+    kNoData = 7,            // No data available.
   };
   bool Ok() const { return value == kSuccess; }
   explicit operator bool() const { return Ok(); }

internal/platform/implementation/windows/nearby_client_socket.cc

@@ -182,9 +182,11 @@ ExceptionOr<ByteArray> NearbyClientSocket::Read(std::int64_t size) {
       // Successfully read some bytes.
       total_bytes_read += bytes_read;
     } else if (bytes_read == 0) {
-      // The peer has performed a graceful shutdown.
-      LOG(INFO) << "Socket closed gracefully by peer before all data was read.";
-      return {Exception::kIo};
+      // The peer has performed a graceful shutdown.  Return any data already
+      // read.
+      buffer.resize(total_bytes_read);
+      LOG(INFO) << "Socket closed by peer, data size: " << buffer.size();
+      return ExceptionOr(ByteArray(std::move(buffer)));
     } else {  // bytes_read == SOCKET_ERROR
       if (WSAGetLastError() == WSAEINTR) {
         VLOG(1) << "Interrupted while reading from socket.";

internal/platform/implementation/windows/socket_address.cc

@@ -210,14 +210,13 @@ ServiceAddress SocketAddress::ToServiceAddress(uint16_t port) const {
                     ipv4_address()->sin_addr.S_un.S_un_b.s_b4},
         .port = port,
     };
-  } else {
-    return ServiceAddress{
-        .address =
-            std::vector<char>(ipv6_address()->sin6_addr.u.Byte,
-                              ipv6_address()->sin6_addr.u.Byte + 16),
-        .port = port,
-    };
   }
+  return ServiceAddress{
+      .address =
+          std::vector<char>(ipv6_address()->sin6_addr.u.Byte,
+                            ipv6_address()->sin6_addr.u.Byte + 16),
+      .port = port,
+  };
 }
 
 

internal/platform/input_stream.cc

@@ -16,7 +16,6 @@
 
 #include <algorithm>
 #include <cstddef>
-#include <cstdint>
 #include <utility>
 
 #include "internal/platform/byte_array.h"
@@ -56,7 +55,7 @@ ExceptionOr<ByteArray> InputStream::ReadExactly(std::size_t size) {
     const ByteArray& result = read_bytes.result();
 
     if (result.Empty()) {
-      return ExceptionOr<ByteArray>(Exception::kIo);
+      return ExceptionOr<ByteArray>(Exception::kNoData);
     }
     if (current_pos == 0) {
       if (result.size() == size) {