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#pragma once
#include "app.hpp"
#include "async_resp.hpp"
#include <sys/socket.h>
#include <boost/asio/local/stream_protocol.hpp>
#include <boost/container/flat_set.hpp>
#include <websocket.hpp>
namespace crow
{
namespace obmc_console
{
// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
static std::unique_ptr<boost::asio::local::stream_protocol::socket> hostSocket;
// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
static std::array<char, 4096> outputBuffer;
// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
static std::string inputBuffer;
// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
static boost::container::flat_set<crow::websocket::Connection*> sessions;
// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
static bool doingWrite = false;
inline void doWrite()
{
if (doingWrite)
{
BMCWEB_LOG_DEBUG << "Already writing. Bailing out";
return;
}
if (inputBuffer.empty())
{
BMCWEB_LOG_DEBUG << "Outbuffer empty. Bailing out";
return;
}
if (!hostSocket)
{
BMCWEB_LOG_ERROR << "doWrite(): Socket closed.";
return;
}
doingWrite = true;
hostSocket->async_write_some(
boost::asio::buffer(inputBuffer.data(), inputBuffer.size()),
[](const boost::beast::error_code& ec, std::size_t bytesWritten) {
doingWrite = false;
inputBuffer.erase(0, bytesWritten);
if (ec == boost::asio::error::eof)
{
for (crow::websocket::Connection* session : sessions)
{
session->close("Error in reading to host port");
}
return;
}
if (ec)
{
BMCWEB_LOG_ERROR << "Error in host serial write " << ec.message();
return;
}
doWrite();
});
}
inline void doRead()
{
if (!hostSocket)
{
BMCWEB_LOG_ERROR << "doRead(): Socket closed.";
return;
}
BMCWEB_LOG_DEBUG << "Reading from socket";
hostSocket->async_read_some(
boost::asio::buffer(outputBuffer.data(), outputBuffer.size()),
[](const boost::system::error_code& ec, std::size_t bytesRead) {
BMCWEB_LOG_DEBUG << "read done. Read " << bytesRead << " bytes";
if (ec)
{
BMCWEB_LOG_ERROR << "Couldn't read from host serial port: "
<< ec.message();
for (crow::websocket::Connection* session : sessions)
{
session->close("Error in connecting to host port");
}
return;
}
std::string_view payload(outputBuffer.data(), bytesRead);
for (crow::websocket::Connection* session : sessions)
{
session->sendBinary(payload);
}
doRead();
});
}
// If connection is active then remove it from the connection map
inline bool removeConnection(crow::websocket::Connection& conn)
{
bool ret = false;
if (sessions.erase(&conn) != 0U)
{
ret = true;
}
if (sessions.empty())
{
hostSocket = nullptr;
inputBuffer.clear();
inputBuffer.shrink_to_fit();
}
return ret;
}
inline void connectConsoleSocket(crow::websocket::Connection& conn,
const boost::system::error_code& ec,
const sdbusplus::message::unix_fd& unixfd)
{
int fd = -1;
if (ec)
{
BMCWEB_LOG_ERROR << "Failed to call console Connect() method"
<< " DBUS error: " << ec.message();
if (removeConnection(conn))
{
conn.close("Failed to call console Connect() method");
}
return;
}
// Make sure that connection is still open.
if (!sessions.contains(&conn))
{
return;
}
fd = dup(unixfd);
if (fd == -1)
{
BMCWEB_LOG_ERROR << "Failed to dup the DBUS unixfd"
<< " error: " << strerror(errno);
if (removeConnection(conn))
{
conn.close("Failed to dup the DBUS unixfd");
}
return;
}
BMCWEB_LOG_DEBUG << "Console web socket path: " << conn.req.target()
<< " Console unix FD: " << unixfd << " duped FD: " << fd;
if (hostSocket == nullptr)
{
boost::system::error_code ec1;
boost::asio::local::stream_protocol proto;
hostSocket =
std::make_unique<boost::asio::local::stream_protocol::socket>(
conn.getIoContext());
hostSocket->assign(proto, fd, ec1);
if (ec1)
{
close(fd);
BMCWEB_LOG_ERROR << "Failed to assign the DBUS socket"
<< " Socket assign error: " << ec1.message();
if (removeConnection(conn))
{
conn.close("Failed to assign the DBUS socket");
}
}
else
{
conn.resumeRead();
doWrite();
doRead();
}
}
else
{
BMCWEB_LOG_DEBUG << "Socket already exist so close the new fd: " << fd;
close(fd);
}
}
// Query consoles from DBUS and find the matching to the
// rules string.
inline void onOpen(crow::websocket::Connection& conn)
{
BMCWEB_LOG_DEBUG << "Connection " << &conn << " opened";
// Save the connection in the map
sessions.insert(&conn);
// We need to wait for dbus and the websockets to hook up before data is
// sent/received. Tell the core to hold off messages until the sockets are
// up
if (hostSocket == nullptr)
{
conn.deferRead();
}
// The console id 'default' is used for the console0
// We need to change it when we provide full multi-console support.
const std::string consolePath = "/xyz/openbmc_project/console/default";
const std::string consoleService = "xyz.openbmc_project.Console.default";
BMCWEB_LOG_DEBUG << "Console Object path = " << consolePath
<< " service = " << consoleService
<< " Request target = " << conn.req.target();
// Call Connect() method to get the unix FD
crow::connections::systemBus->async_method_call(
[&conn](const boost::system::error_code& ec,
const sdbusplus::message::unix_fd& unixfd) {
connectConsoleSocket(conn, ec, unixfd);
},
consoleService, consolePath, "xyz.openbmc_project.Console.Access",
"Connect");
}
inline void requestRoutes(App& app)
{
BMCWEB_ROUTE(app, "/console0")
.privileges({{"OpenBMCHostConsole"}})
.websocket()
.onopen(onOpen)
.onclose([](crow::websocket::Connection& conn,
[[maybe_unused]] const std::string& reason) {
BMCWEB_LOG_INFO << "Closing websocket. Reason: " << reason;
removeConnection(conn);
})
.onmessage([]([[maybe_unused]] crow::websocket::Connection& conn,
const std::string& data, [[maybe_unused]] bool isBinary) {
inputBuffer += data;
doWrite();
});
}
} // namespace obmc_console
} // namespace crow
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