blob: f68dd90cfb0e3a5de76a04f55289d55e33580fbe [file] [log] [blame]
#include "neighbor.hpp"
#include "ethernet_interface.hpp"
#include "netlink.hpp"
#include "util.hpp"
#include <linux/neighbour.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <net/if.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <phosphor-logging/elog-errors.hpp>
#include <phosphor-logging/elog.hpp>
#include <stdexcept>
#include <stdplus/raw.hpp>
#include <string_view>
#include <utility>
#include <vector>
#include <xyz/openbmc_project/Common/error.hpp>
namespace phosphor
{
namespace network
{
namespace detail
{
void parseNeighbor(const NeighborFilter& filter, const nlmsghdr& hdr,
std::string_view msg, std::vector<NeighborInfo>& neighbors)
{
if (hdr.nlmsg_type != RTM_NEWNEIGH)
{
throw std::runtime_error("Not a neighbor msg");
}
auto ndm = stdplus::raw::extract<ndmsg>(msg);
// Filter out neighbors we don't care about
unsigned ifindex = ndm.ndm_ifindex;
if (filter.interface != 0 && filter.interface != ifindex)
{
return;
}
if ((ndm.ndm_state & filter.state) == 0)
{
return;
}
// Build the neighbor info for our valid neighbor
NeighborInfo neighbor;
neighbor.interface = ifindex;
neighbor.state = ndm.ndm_state;
bool set_addr = false;
while (!msg.empty())
{
auto [hdr, data] = netlink::extractRtAttr(msg);
if (hdr.rta_type == NDA_LLADDR)
{
neighbor.mac = stdplus::raw::copyFrom<ether_addr>(data);
}
else if (hdr.rta_type == NDA_DST)
{
neighbor.address = addrFromBuf(ndm.ndm_family, data);
set_addr = true;
}
}
if (!set_addr)
{
throw std::runtime_error("Missing address");
}
neighbors.push_back(std::move(neighbor));
}
} // namespace detail
std::vector<NeighborInfo> getCurrentNeighbors(const NeighborFilter& filter)
{
std::vector<NeighborInfo> neighbors;
auto cb = [&filter, &neighbors](const nlmsghdr& hdr, std::string_view msg) {
detail::parseNeighbor(filter, hdr, msg, neighbors);
};
ndmsg msg{};
msg.ndm_ifindex = filter.interface;
netlink::performRequest(NETLINK_ROUTE, RTM_GETNEIGH, NLM_F_DUMP, msg, cb);
return neighbors;
}
Neighbor::Neighbor(sdbusplus::bus_t& bus, const char* objPath,
EthernetInterface& parent, const std::string& ipAddress,
const std::string& macAddress, State state) :
NeighborObj(bus, objPath, NeighborObj::action::defer_emit),
parent(parent)
{
NeighborObj::ipAddress(ipAddress);
NeighborObj::macAddress(macAddress);
NeighborObj::state(state);
// Emit deferred signal.
emit_object_added();
}
void Neighbor::delete_()
{
parent.deleteStaticNeighborObject(ipAddress());
}
using sdbusplus::xyz::openbmc_project::Common::Error::NotAllowed;
using REASON =
phosphor::logging::xyz::openbmc_project::Common::NotAllowed::REASON;
using phosphor::logging::elog;
std::string Neighbor::ipAddress(std::string /*ipAddress*/)
{
elog<NotAllowed>(REASON("Property update is not allowed"));
}
std::string Neighbor::macAddress(std::string /*macAddress*/)
{
elog<NotAllowed>(REASON("Property update is not allowed"));
}
Neighbor::State Neighbor::state(State /*state*/)
{
elog<NotAllowed>(REASON("Property update is not allowed"));
}
} // namespace network
} // namespace phosphor