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sd_event_loop.cpp
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sd_event_loop.cpp
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#include "sd_event_loop.hpp"
#include "main.hpp"
#include "message_handler.hpp"
#include <error.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <systemd/sd-daemon.h>
#include <boost/asio/io_context.hpp>
#include <boost/asio/signal_set.hpp>
#include <phosphor-logging/lg2.hpp>
#include <sdbusplus/asio/sd_event.hpp>
#include <user_channel/channel_layer.hpp>
namespace eventloop
{
void EventLoop::handleRmcpPacket()
{
try
{
auto channelPtr = std::make_shared<udpsocket::Channel>(udpSocket);
// Initialize the Message Handler with the socket channel
auto msgHandler = std::make_shared<message::Handler>(channelPtr, io);
msgHandler->processIncoming();
}
catch (const std::exception& e)
{
lg2::error("Executing the IPMI message failed: {ERROR}", "ERROR", e);
}
}
void EventLoop::startRmcpReceive()
{
udpSocket->async_wait(
boost::asio::socket_base::wait_read,
[this](const boost::system::error_code& ec) {
if (!ec)
{
boost::asio::post(*io, [this]() { startRmcpReceive(); });
handleRmcpPacket();
}
});
}
int EventLoop::getVLANID(const std::string channel)
{
int vlanid = 0;
if (channel.empty())
{
return 0;
}
sdbusplus::bus_t bus{ipmid_get_sd_bus_connection()};
// Enumerate all VLAN + ETHERNET interfaces
auto req = bus.new_method_call(MAPPER_BUS_NAME, MAPPER_OBJ, MAPPER_INTF,
"GetSubTree");
req.append(PATH_ROOT, 0,
std::vector<std::string>{INTF_VLAN, INTF_ETHERNET});
ObjectTree objs;
try
{
auto reply = bus.call(req);
reply.read(objs);
}
catch (const std::exception& e)
{
lg2::error("getVLANID: failed to execute/read GetSubTree: {ERROR}",
"ERROR", e);
return 0;
}
std::string ifService, logicalPath;
for (const auto& [path, impls] : objs)
{
if (path.find(channel) == path.npos)
{
continue;
}
for (const auto& [service, intfs] : impls)
{
bool vlan = false;
bool ethernet = false;
for (const auto& intf : intfs)
{
if (intf == INTF_VLAN)
{
vlan = true;
}
else if (intf == INTF_ETHERNET)
{
ethernet = true;
}
}
if (ifService.empty() && (vlan || ethernet))
{
ifService = service;
}
if (logicalPath.empty() && vlan)
{
logicalPath = path;
}
}
}
// VLAN devices will always have a separate logical object
if (logicalPath.empty())
{
return 0;
}
Value value;
auto method = bus.new_method_call(ifService.c_str(), logicalPath.c_str(),
PROP_INTF, METHOD_GET);
method.append(INTF_VLAN, "Id");
try
{
auto method_reply = bus.call(method);
method_reply.read(value);
}
catch (const std::exception& e)
{
lg2::error("getVLANID: failed to execute/read VLAN Id: {ERROR}",
"ERROR", e);
return 0;
}
vlanid = std::get<uint32_t>(value);
if ((vlanid & VLAN_VALUE_MASK) != vlanid)
{
lg2::error("networkd returned an invalid vlan: {VLAN}", "VLAN", vlanid);
return 0;
}
return vlanid;
}
int EventLoop::setupSocket(std::shared_ptr<sdbusplus::asio::connection>& bus,
std::string channel, uint16_t reqPort)
{
std::string iface = channel;
static constexpr const char* unboundIface = "rmcpp";
if (channel == "")
{
iface = channel = unboundIface;
}
else
{
// If VLANID of this channel is set, bind the socket to this
// VLAN logic device
auto vlanid = getVLANID(channel);
if (vlanid)
{
iface = iface + "." + std::to_string(vlanid);
lg2::debug("This channel has VLAN id: {VLAN}", "VLAN", vlanid);
}
}
// Create our own socket if SysD did not supply one.
int listensFdCount = sd_listen_fds(0);
if (listensFdCount > 1)
{
lg2::error("Too many file descriptors received, listensFdCount: {FD}",
"FD", listensFdCount);
return EXIT_FAILURE;
}
if (listensFdCount == 1)
{
int openFd = SD_LISTEN_FDS_START;
if (!sd_is_socket(openFd, AF_UNSPEC, SOCK_DGRAM, -1))
{
lg2::error("Failed to set up systemd-passed socket: {ERROR}",
"ERROR", strerror(errno));
return EXIT_FAILURE;
}
udpSocket = std::make_shared<boost::asio::ip::udp::socket>(
*io, boost::asio::ip::udp::v6(), openFd);
}
else
{
// asio does not natively offer a way to bind to an interface
// so it must be done in steps
boost::asio::ip::udp::endpoint ep(boost::asio::ip::udp::v6(), reqPort);
udpSocket = std::make_shared<boost::asio::ip::udp::socket>(*io);
udpSocket->open(ep.protocol());
// bind
udpSocket->set_option(
boost::asio::ip::udp::socket::reuse_address(true));
udpSocket->bind(ep);
}
// SO_BINDTODEVICE
char nameout[IFNAMSIZ];
unsigned int lenout = sizeof(nameout);
if ((::getsockopt(udpSocket->native_handle(), SOL_SOCKET, SO_BINDTODEVICE,
nameout, &lenout) == -1))
{
lg2::error("Failed to read bound device: {ERROR}", "ERROR",
strerror(errno));
}
if (iface != nameout && iface != unboundIface)
{
// SO_BINDTODEVICE
if ((::setsockopt(udpSocket->native_handle(), SOL_SOCKET,
SO_BINDTODEVICE, iface.c_str(), iface.size() + 1) ==
-1))
{
lg2::error("Failed to bind to requested interface: {ERROR}",
"ERROR", strerror(errno));
return EXIT_FAILURE;
}
lg2::info("Bind to interface: {INTERFACE}", "INTERFACE", iface);
}
// cannot be constexpr because it gets passed by address
const int option_enabled = 1;
// common socket stuff; set options to get packet info (DST addr)
::setsockopt(udpSocket->native_handle(), IPPROTO_IP, IP_PKTINFO,
&option_enabled, sizeof(option_enabled));
::setsockopt(udpSocket->native_handle(), IPPROTO_IPV6, IPV6_RECVPKTINFO,
&option_enabled, sizeof(option_enabled));
// set the dbus name
std::string busName = "xyz.openbmc_project.Ipmi.Channel." + channel;
try
{
bus->request_name(busName.c_str());
}
catch (const std::exception& e)
{
lg2::error("Failed to acquire D-Bus name: {NAME}: {ERROR}", "NAME",
busName, "ERROR", e);
return EXIT_FAILURE;
}
return 0;
}
int EventLoop::startEventLoop()
{
// set up boost::asio signal handling
boost::asio::signal_set signals(*io, SIGINT, SIGTERM);
signals.async_wait([this](const boost::system::error_code& /* error */,
int /* signalNumber */) {
udpSocket->cancel();
udpSocket->close();
io->stop();
});
startRmcpReceive();
io->run();
return EXIT_SUCCESS;
}
} // namespace eventloop