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#include <crow/app.h>
#include <tinyxml2.h>
#include <dbus/connection.hpp>
#include <dbus/endpoint.hpp>
#include <dbus/filter.hpp>
#include <dbus/match.hpp>
#include <dbus/message.hpp>
#include <dbus_singleton.hpp>
namespace crow {
namespace openbmc_mapper {
std::atomic<std::size_t> outstanding_async_calls(0);
nlohmann::json object_paths;
void introspect_objects(crow::response &res, std::string process_name,
std::string path) {
dbus::endpoint introspect_endpoint(
process_name, path, "org.freedesktop.DBus.Introspectable", "Introspect");
outstanding_async_calls++;
crow::connections::system_bus->async_method_call(
[&, process_name{std::move(process_name)}, object_path{std::move(path)} ](
const boost::system::error_code ec,
const std::string &introspect_xml) {
outstanding_async_calls--;
if (ec) {
std::cerr << "Introspect call failed with error: " << ec.message()
<< " on process: " << process_name
<< " path: " << object_path << "\n";
} else {
object_paths.push_back({{"path", object_path}});
tinyxml2::XMLDocument doc;
doc.Parse(introspect_xml.c_str());
tinyxml2::XMLNode *pRoot = doc.FirstChildElement("node");
if (pRoot == nullptr) {
std::cerr << "XML document failed to parse " << process_name << " "
<< path << "\n";
} else {
tinyxml2::XMLElement *node = pRoot->FirstChildElement("node");
while (node != nullptr) {
std::string child_path = node->Attribute("name");
std::string newpath;
if (object_path != "/") {
newpath += object_path;
}
newpath += "/" + child_path;
// intropect the subobjects as well
introspect_objects(res, process_name, newpath);
node = node->NextSiblingElement("node");
}
}
}
// if we're the last outstanding caller, finish the request
if (outstanding_async_calls == 0) {
nlohmann::json j{{"status", "ok"},
{"bus_name", process_name},
{"objects", object_paths}};
res.write(j.dump());
object_paths.clear();
res.end();
}
},
introspect_endpoint);
}
template <typename... Middlewares>
void request_routes(Crow<Middlewares...> &app) {
CROW_ROUTE(app, "/bus/").methods("GET"_method)([](const crow::request &req) {
return nlohmann::json{{"busses", {{{"name", "system"}}}}, {"status", "ok"}};
});
CROW_ROUTE(app, "/bus/system/")
.methods("GET"_method)([](const crow::request &req, crow::response &res) {
crow::connections::system_bus->async_method_call(
[&](const boost::system::error_code ec,
std::vector<std::string> &names) {
std::sort(names.begin(), names.end());
if (ec) {
res.code = 500;
} else {
nlohmann::json j{{"status", "ok"}};
auto &objects_sub = j["objects"];
for (auto &name : names) {
objects_sub.push_back({{"name", name}});
}
res.write(j.dump());
}
res.end();
},
{"org.freedesktop.DBus", "/", "org.freedesktop.DBus", "ListNames"});
});
CROW_ROUTE(app, "/bus/system/<str>/")
.methods("GET"_method)([](const crow::request &req, crow::response &res,
const std::string &connection) {
// Can only do one call at a time (for now)
if (outstanding_async_calls == 0) {
// TODO(ed) sanitize paths
introspect_objects(res, connection, "/");
} else {
nlohmann::json j{{"status", "failed"}};
res.code = 500;
res.write(j.dump());
res.end();
}
});
CROW_ROUTE(app, "/bus/system/<str>/<path>")
.methods("GET"_method)([](const crow::request &req, crow::response &res,
const std::string &process_name,
const std::string &requested_path) {
std::vector<std::string> strs;
boost::split(strs, requested_path, boost::is_any_of("/"));
std::string object_path;
std::string interface_name;
std::string method_name;
auto it = strs.begin();
if (it == strs.end()) {
object_path = "/";
}
while (it != strs.end()) {
// Check if segment contains ".". If it does, it must be an
// interface
if ((*it).find(".") != std::string::npos) {
break;
// THis check is neccesary as the trailing slash gets parsed as part
// of our <path> specifier above, which causes the normal trailing
// backslash redirector to fail.
} else if (!it->empty()) {
object_path += "/" + *it;
}
it++;
}
if (it != strs.end()) {
interface_name = *it;
it++;
// after interface, we might have a method name
if (it != strs.end()) {
method_name = *it;
it++;
}
}
if (it != strs.end()) {
// if there is more levels past the method name, something went
// wrong, throw an error
res.code = 404;
res.end();
return;
}
dbus::endpoint introspect_endpoint(
process_name, object_path, "org.freedesktop.DBus.Introspectable",
"Introspect");
if (interface_name.empty()) {
crow::connections::system_bus->async_method_call(
[
&, process_name{std::move(process_name)},
object_path{std::move(object_path)}
](const boost::system::error_code ec,
const std::string &introspect_xml) {
if (ec) {
std::cerr
<< "Introspect call failed with error: " << ec.message()
<< " on process: " << process_name
<< " path: " << object_path << "\n";
} else {
tinyxml2::XMLDocument doc;
doc.Parse(introspect_xml.c_str());
tinyxml2::XMLNode *pRoot = doc.FirstChildElement("node");
if (pRoot == nullptr) {
std::cerr << "XML document failed to parse " << process_name
<< " " << object_path << "\n";
res.write(nlohmann::json{{"status", "XML parse error"}});
res.code = 500;
} else {
nlohmann::json interfaces_array = nlohmann::json::array();
tinyxml2::XMLElement *interface =
pRoot->FirstChildElement("interface");
while (interface != nullptr) {
std::string iface_name = interface->Attribute("name");
interfaces_array.push_back({{"name", iface_name}});
interface = interface->NextSiblingElement("interface");
}
nlohmann::json j{{"status", "ok"},
{"bus_name", process_name},
{"interfaces", interfaces_array},
{"object_path", object_path}};
res.write(j.dump());
}
}
res.end();
},
introspect_endpoint);
} else {
crow::connections::system_bus->async_method_call(
[
&, process_name{std::move(process_name)},
interface_name{std::move(interface_name)},
object_path{std::move(object_path)}
](const boost::system::error_code ec,
const std::string &introspect_xml) {
if (ec) {
std::cerr
<< "Introspect call failed with error: " << ec.message()
<< " on process: " << process_name
<< " path: " << object_path << "\n";
} else {
tinyxml2::XMLDocument doc;
doc.Parse(introspect_xml.c_str());
tinyxml2::XMLNode *pRoot = doc.FirstChildElement("node");
if (pRoot == nullptr) {
std::cerr << "XML document failed to parse " << process_name
<< " " << object_path << "\n";
res.code = 500;
} else {
tinyxml2::XMLElement *node =
pRoot->FirstChildElement("node");
// if we know we're the only call, build the json directly
nlohmann::json methods_array = nlohmann::json::array();
nlohmann::json signals_array = nlohmann::json::array();
tinyxml2::XMLElement *interface =
pRoot->FirstChildElement("interface");
while (interface != nullptr) {
std::string iface_name = interface->Attribute("name");
if (iface_name == interface_name) {
tinyxml2::XMLElement *methods =
interface->FirstChildElement("method");
while (methods != nullptr) {
nlohmann::json args_array = nlohmann::json::array();
tinyxml2::XMLElement *arg =
methods->FirstChildElement("arg");
while (arg != nullptr) {
args_array.push_back(
{{"name", arg->Attribute("name")},
{"type", arg->Attribute("type")},
{"direction", arg->Attribute("direction")}});
arg = arg->NextSiblingElement("arg");
}
methods_array.push_back(
{{"name", methods->Attribute("name")},
{"uri", "/bus/system/" + process_name +
object_path + "/" + interface_name +
"/" + methods->Attribute("name")},
{"args", args_array}});
methods = methods->NextSiblingElement("method");
}
tinyxml2::XMLElement *signals =
interface->FirstChildElement("signal");
while (signals != nullptr) {
nlohmann::json args_array = nlohmann::json::array();
tinyxml2::XMLElement *arg =
signals->FirstChildElement("arg");
while (arg != nullptr) {
std::string name = arg->Attribute("name");
std::string type = arg->Attribute("type");
args_array.push_back({
{"name", name}, {"type", type},
});
arg = arg->NextSiblingElement("arg");
}
signals_array.push_back(
{{"name", signals->Attribute("name")},
{"args", args_array}});
signals = signals->NextSiblingElement("signal");
}
nlohmann::json j{
{"status", "ok"},
{"bus_name", process_name},
{"interface", interface_name},
{"methods", methods_array},
{"object_path", object_path},
{"properties", nlohmann::json::object()},
{"signals", signals_array}};
res.write(j.dump());
break;
}
interface = interface->NextSiblingElement("interface");
}
if (interface == nullptr) {
// if we got to the end of the list and never found a
// match, throw 404
res.code = 404;
}
}
}
res.end();
},
introspect_endpoint);
}
});
}
} // namespace openbmc_mapper
} // namespace crow
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