SERVER-42287 SNI names are not allowed to include IP addresses

1 files changed, 82 insertions, 0 deletions

diff --git a/src/mongo/db/commands/whats_my_sni_command.cpp b/src/mongo/db/commands/whats_my_sni_command.cpp
new file mode 100644
index 00000000000..0b758235c8b
--- /dev/null
+++ b/src/mongo/db/commands/whats_my_sni_command.cpp
@@ -0,0 +1,82 @@
+/**
+ *    Copyright (C) 2019-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kCommand
+
+#include "mongo/db/commands.h"
+#include "mongo/util/log.h"
+
+namespace mongo {
+
+/* for diagnostic / testing purposes. Enabled via command line. */
+class CmdWhatsMySNI : public BasicCommand {
+public:
+    CmdWhatsMySNI() : BasicCommand("whatsmysni") {}
+
+    std::string help() const override {
+        return "internal testing command. Returns an object containing the connection's "
+               "advertised SNI name, if any, and false if none is being advertised";
+    }
+
+    bool run(OperationContext* opCtx,
+             const std::string& ns,
+             const BSONObj& cmdObj,
+             BSONObjBuilder& result) override {
+        auto sniName = opCtx->getClient()->getSniNameForSession();
+        // if no SNI name is advertised, output is false
+        if (!sniName) {
+            result.append("sni", false);
+        } else {
+            result.append("sni", *sniName);
+        }
+
+        result.append("ok", 1);
+
+        return true;
+    }
+
+    bool supportsWriteConcern(const BSONObj& cmd) const override {
+        return false;
+    }
+
+    bool adminOnly() const override {
+        return true;
+    }
+
+    AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
+        return AllowedOnSecondary::kAlways;
+    }
+
+    void addRequiredPrivileges(const std::string& dbname,
+                               const BSONObj& cmdObj,
+                               std::vector<Privilege>* out) const override {}
+};
+
+MONGO_REGISTER_TEST_COMMAND(CmdWhatsMySNI)
+}  // namespace mongo