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 "cpld.hpp" 16 17 #include "commands.hpp" 18 #include "errors.hpp" 19 #include "handler.hpp" 20 21 #include <cstring> 22 #include <ipmid/api-types.hpp> 23 #include <vector> 24 25 namespace google 26 { 27 namespace ipmi 28 { 29 30 struct CpldRequest 31 { 32 uint8_t id; 33 } __attribute__((packed)); 34 35 // 36 // Handle reading the cpld version from the tmpfs. 37 // 38 Resp cpldVersion(const std::vector<std::uint8_t>& data, 39 const HandlerInterface* handler) 40 { 41 struct CpldRequest request; 42 43 if (data.size() < sizeof(request)) 44 { 45 std::fprintf(stderr, "Invalid command length: %u\n", 46 static_cast<uint32_t>(data.size())); 47 return ::ipmi::responseReqDataLenInvalid(); 48 } 49 50 // data[0] is the CPLD id. "/run/cpld{id}.version" is what we read. 51 // Verified that this cast actually returns the value 255 and not something 52 // negative in the case where data[0] is 0xff. However, it looks weird 53 // since I would expect int(uint8(0xff)) to be -1. So, just cast it 54 // unsigned. we're casting to an int width to avoid it thinking it's a 55 // letter, because it does that. 56 std::memcpy(&request, data.data(), sizeof(request)); 57 58 try 59 { 60 auto values = 61 handler->getCpldVersion(static_cast<unsigned int>(request.id)); 62 63 // Truncate if the version is too high (documented). 64 auto major = std::get<0>(values); 65 auto minor = std::get<1>(values); 66 auto point = std::get<2>(values); 67 auto subpoint = std::get<3>(values); 68 69 return ::ipmi::responseSuccess( 70 SysOEMCommands::SysCpldVersion, 71 std::vector<std::uint8_t>{major, minor, point, subpoint}); 72 } 73 catch (const IpmiException& e) 74 { 75 return ::ipmi::response(e.getIpmiError()); 76 } 77 } 78 79 } // namespace ipmi 80 } // namespace google 81