1 // Copyright 2024 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 "bm_instance.hpp"
16 
17 #include "commands.hpp"
18 #include "errors.hpp"
19 #include "handler.hpp"
20 
21 #include <ipmid/api-types.hpp>
22 #include <stdplus/print.hpp>
23 
24 #include <span>
25 #include <vector>
26 
27 namespace google
28 {
29 namespace ipmi
30 {
31 
32 namespace
33 {
34 #ifndef MAX_IPMI_BUFFER
35 #define MAX_IPMI_BUFFER 64
36 #endif
37 } // namespace
38 
39 struct BMInstancePropertyRequest
40 {
41     std::uint8_t bmInstancePropertyType;
42 } __attribute__((packed));
43 
44 Resp getBMInstanceProperty(std::span<const uint8_t> data,
45                            HandlerInterface* handler)
46 {
47     if (data.size() < sizeof(struct BMInstancePropertyRequest))
48     {
49         stdplus::print(stderr, "Invalid command length: {}\n",
50                        static_cast<uint32_t>(data.size()));
51         return ::ipmi::responseReqDataLenInvalid();
52     }
53 
54     std::string bmInstanceProperty =
55         handler->getBMInstanceProperty(/*type=*/data[0]);
56 
57     const size_t length =
58         sizeof(struct BMInstancePropertyReply) + bmInstanceProperty.size();
59 
60     if (length > MAX_IPMI_BUFFER)
61     {
62         stdplus::print(stderr, "Response would overflow response buffer\n");
63         return ::ipmi::responseInvalidCommand();
64     }
65 
66     std::vector<std::uint8_t> reply;
67     reply.reserve(length);
68     reply.emplace_back(bmInstanceProperty.size());
69     reply.insert(reply.end(), bmInstanceProperty.begin(),
70                  bmInstanceProperty.end());
71 
72     return ::ipmi::responseSuccess(SysOEMCommands::SysGetBMInstanceProperty,
73                                    reply);
74 }
75 } // namespace ipmi
76 } // namespace google
77