1 // Copyright 2021 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //      http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #include "machine_name.hpp"
16 
17 #include "commands.hpp"
18 #include "errors.hpp"
19 
20 #include <ipmid/api-types.hpp>
21 
22 #include <cstddef>
23 #include <cstdio>
24 #include <cstring>
25 #include <optional>
26 #include <span>
27 #include <string>
28 #include <vector>
29 
30 namespace google
31 {
32 namespace ipmi
33 {
34 
35 Resp getMachineName(std::span<const uint8_t>, HandlerInterface* handler)
36 {
37     static std::optional<std::string> machineName;
38     if (!machineName)
39     {
40         try
41         {
42             machineName = handler->getMachineName();
43         }
44         catch (const IpmiException& e)
45         {
46             return ::ipmi::response(e.getIpmiError());
47         }
48     }
49 
50     size_t len = sizeof(struct GetMachineNameReply) + machineName->size();
51     if (len > MAX_IPMI_BUFFER)
52     {
53         std::fprintf(stderr, "Response would overflow response buffer\n");
54         return ::ipmi::responseInvalidCommand();
55     }
56 
57     std::vector<std::uint8_t> reply;
58     reply.reserve(len);
59     reply.emplace_back(machineName->size()); /* machineNameLength */
60     reply.insert(reply.end(), machineName->begin(),
61                  machineName->end());        /* machineName */
62 
63     return ::ipmi::responseSuccess(SysOEMCommands::SysMachineName, reply);
64 }
65 
66 } // namespace ipmi
67 } // namespace google
68