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#include "rtnetlink_server.hpp"
#include "timer.hpp"
#include "types.hpp"
#include "util.hpp"
#include <netinet/in.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <net/if.h>
#include <sys/types.h>
#include <systemd/sd-daemon.h>
#include <unistd.h>
#include <phosphor-logging/log.hpp>
#include <phosphor-logging/elog-errors.hpp>
#include <xyz/openbmc_project/Common/error.hpp>
#include <memory>
namespace phosphor
{
namespace network
{
extern std::unique_ptr<phosphor::network::Timer> refreshObjectTimer;
namespace rtnetlink
{
/* Call Back for the sd event loop */
static int eventHandler(sd_event_source* es, int fd, uint32_t revents,
void* userdata)
{
char buffer[phosphor::network::rtnetlink::BUFSIZE] {};
int len {};
auto netLinkHeader = reinterpret_cast<struct nlmsghdr*>(buffer);
while ((len = recv(fd, netLinkHeader,
phosphor::network::rtnetlink::BUFSIZE, 0)) > 0)
{
for (; (NLMSG_OK(netLinkHeader, len)) &&
(netLinkHeader->nlmsg_type != NLMSG_DONE);
netLinkHeader = NLMSG_NEXT(netLinkHeader, len))
{
if (netLinkHeader->nlmsg_type == RTM_NEWADDR ||
netLinkHeader->nlmsg_type == RTM_DELADDR)
{
// starting the timer here to make sure that we don't want
// create the child objects multiple times.
if (refreshObjectTimer->isExpired())
{
using namespace std::chrono;
auto time = duration_cast<microseconds>(refreshTimeout);
// if start timer throws exception then let the application
// crash
refreshObjectTimer->startTimer(time);
} // end if
} // end if
} // end for
} // end while
return 0;
}
Server::Server(EventPtr& eventPtr)
{
using namespace phosphor::logging;
using InternalFailure = sdbusplus::xyz::openbmc_project::Common::
Error::InternalFailure;
struct sockaddr_nl addr {};
int fd = -1;
phosphor::Descriptor smartSock(fd);
int r {};
sigset_t ss {};
if (sigemptyset(&ss) < 0 || sigaddset(&ss, SIGTERM) < 0 ||
sigaddset(&ss, SIGINT) < 0)
{
r = -errno;
goto finish;
}
/* Block SIGTERM first, so that the event loop can handle it */
if (sigprocmask(SIG_BLOCK, &ss, NULL) < 0)
{
r = -errno;
goto finish;
}
/* Let's make use of the default handler and "floating"
reference features of sd_event_add_signal() */
r = sd_event_add_signal(eventPtr.get(), NULL, SIGTERM, NULL, NULL);
if (r < 0)
{
goto finish;
}
r = sd_event_add_signal(eventPtr.get(), NULL, SIGINT, NULL, NULL);
if (r < 0)
{
goto finish;
}
fd = socket(PF_NETLINK, SOCK_RAW | SOCK_NONBLOCK, NETLINK_ROUTE);
if (fd < 0)
{
r = -errno;
goto finish;
}
smartSock.set(fd);
fd = -1;
memset(&addr, 0, sizeof(addr));
addr.nl_family = AF_NETLINK;
addr.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR;
if (bind(smartSock(), (struct sockaddr*)&addr, sizeof(addr)) < 0)
{
r = -errno;
goto finish;
}
r = sd_event_add_io(eventPtr.get(), nullptr,
smartSock(), EPOLLIN, eventHandler, nullptr);
if (r < 0)
{
goto finish;
}
finish:
if (r < 0)
{
log<level::ERR>("Failure Occured in starting of server:",
entry("ERRNO=%d", errno));
elog<InternalFailure>();
}
}
} //rtnetlink
} //network
} //phosphor
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