Back out "fbcode/fboss/lib/oss"

Summary:
Original commit changeset: 0f6a66b3c0b1

Original Phabricator Diff: D63823194

Used in OSS. I am working on having Dead Code Bot updated to stop making these types of changes https://fb.workplace.com/groups/dead.code.bot/permalink/1712404122870889/.

Reviewed By: srikrishnagopu

Differential Revision: D63909637

fbshipit-source-id: 944b2134d515f7353ae9f697131fa7928c688a43

fboss/lib/oss/LogThriftCall.cpp

@@ -0,0 +1,28 @@
+/*
+ *  Copyright (c) 2004-present, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+#include "fboss/lib/LogThriftCall.h"
+
+namespace facebook::fboss {
+
+std::optional<std::string> LogThriftCall::getIdentityFromConnContext(
+    apache::thrift::Cpp2ConnContext* ctx) const {
+  if (ctx) {
+    // note that getPeerCommonName is not 100% reliable with certain
+    // protocols that may cache certificates at the transport layer.
+    auto identity = ctx->getPeerCommonName();
+    if (!identity.empty()) {
+      return identity;
+    }
+  }
+  return std::nullopt;
+}
+
+} // namespace facebook::fboss