1 #include "system_configuration.hpp"
2 
3 #include <phosphor-logging/elog-errors.hpp>
4 #include <phosphor-logging/lg2.hpp>
5 #include <stdplus/pinned.hpp>
6 #include <xyz/openbmc_project/Common/error.hpp>
7 
8 namespace phosphor
9 {
10 namespace network
11 {
12 
13 static constexpr char HOSTNAMED_SVC[] = "org.freedesktop.hostname1";
14 static constexpr char HOSTNAMED_OBJ[] = "/org/freedesktop/hostname1";
15 static constexpr char HOSTNAMED_INTF[] = "org.freedesktop.hostname1";
16 
17 using namespace phosphor::logging;
18 using namespace sdbusplus::xyz::openbmc_project::Common::Error;
19 using Argument = xyz::openbmc_project::Common::InvalidArgument;
20 
21 static constexpr char propMatch[] =
22     "type='signal',sender='org.freedesktop.hostname1',"
23     "path='/org/freedesktop/hostname1',"
24     "interface='org.freedesktop.DBus.Properties',member='PropertiesChanged',"
25     "arg0='org.freedesktop.hostname1'";
26 
27 SystemConfiguration::SystemConfiguration(
28     stdplus::PinnedRef<sdbusplus::bus_t> bus, stdplus::const_zstring objPath) :
29     Iface(bus, objPath.c_str(), Iface::action::defer_emit), bus(bus),
30     hostnamePropMatch(
31         bus, propMatch,
32         [sc = stdplus::PinnedRef(*this)](sdbusplus::message_t& m) {
33             std::string intf;
34             std::unordered_map<std::string, std::variant<std::string>> values;
35             try
36             {
37                 m.read(intf, values);
38                 auto it = values.find("Hostname");
39                 if (it == values.end())
40                 {
41                     return;
42                 }
43                 sc.get().Iface::hostName(std::get<std::string>(it->second));
44             }
45             catch (const std::exception& e)
46             {
47                 lg2::error("Hostname match parsing failed: {ERROR}", "ERROR",
48                            e);
49             }
50         })
51 {
52     try
53     {
54         std::variant<std::string> name;
55         auto req =
56             bus.get().new_method_call(HOSTNAMED_SVC, HOSTNAMED_OBJ,
57                                       "org.freedesktop.DBus.Properties", "Get");
58 
59         req.append(HOSTNAMED_INTF, "Hostname");
60         auto reply = req.call();
61         reply.read(name);
62         SystemConfigIntf::hostName(std::get<std::string>(name), true);
63     }
64     catch (const std::exception& e)
65     {
66         lg2::error("Failed to get hostname: {ERROR}", "ERROR", e);
67     }
68 
69     emit_object_added();
70 }
71 
72 std::string SystemConfiguration::hostName(std::string name)
73 {
74     if (SystemConfigIntf::hostName() == name)
75     {
76         return name;
77     }
78     try
79     {
80         auto method = bus.get().new_method_call(
81             HOSTNAMED_SVC, HOSTNAMED_OBJ, HOSTNAMED_INTF, "SetStaticHostname");
82         method.append(name, /*interactive=*/false);
83         method.call();
84         return SystemConfigIntf::hostName(std::move(name));
85     }
86     catch (const sdbusplus::exception::SdBusError& e)
87     {
88         lg2::error("Failed to set hostname {HOSTNAME}: {ERROR} ", "HOSTNAME",
89                    name, "ERROR", e);
90         auto dbusError = e.get_error();
91         if ((dbusError != nullptr) &&
92             (strcmp(dbusError->name,
93                     "org.freedesktop.DBus.Error.InvalidArgs") == 0))
94         {
95             elog<InvalidArgument>(Argument::ARGUMENT_NAME("Hostname"),
96                                   Argument::ARGUMENT_VALUE(name.c_str()));
97         }
98     }
99     return SystemConfigIntf::hostName();
100 }
101 
102 } // namespace network
103 } // namespace phosphor
104