blob: aa8e46bfc27308ba2281d7721e42dc662ed9e6e8 [file] [log] [blame]
#include "system_queries.hpp"
#include "netlink.hpp"
#include "util.hpp"
#include <fmt/format.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include <net/if.h>
#include <algorithm>
#include <optional>
#include <phosphor-logging/log.hpp>
#include <stdexcept>
#include <stdplus/fd/create.hpp>
#include <stdplus/raw.hpp>
#include <stdplus/util/cexec.hpp>
#include <string_view>
#include <system_error>
namespace phosphor::network::system
{
using std::literals::string_view_literals::operator""sv;
using phosphor::logging::entry;
using phosphor::logging::level;
using phosphor::logging::log;
static stdplus::Fd& getIFSock()
{
using namespace stdplus::fd;
static auto fd =
socket(SocketDomain::INet, SocketType::Datagram, SocketProto::IP);
return fd;
}
static ifreq makeIFReq(std::string_view ifname)
{
ifreq ifr = {};
const auto copied = std::min<std::size_t>(ifname.size(), IFNAMSIZ - 1);
std::copy_n(ifname.begin(), copied, ifr.ifr_name);
return ifr;
}
static ifreq executeIFReq(std::string_view ifname, unsigned long cmd,
void* data = nullptr)
{
ifreq ifr = makeIFReq(ifname);
ifr.ifr_data = reinterpret_cast<char*>(data);
getIFSock().ioctl(cmd, &ifr);
return ifr;
}
inline auto optionalIFReq(stdplus::zstring_view ifname, unsigned long long cmd,
std::string_view cmdname, auto&& complete,
void* data = nullptr)
{
ifreq ifr;
std::optional<decltype(complete(ifr))> ret;
auto ukey = std::make_tuple(std::string(ifname), cmd);
static std::unordered_set<std::tuple<std::string, unsigned long long>>
unsupported;
try
{
ifr = executeIFReq(ifname, cmd, data);
}
catch (const std::system_error& e)
{
if (e.code() == std::errc::operation_not_supported)
{
if (unsupported.find(ukey) == unsupported.end())
{
unsupported.emplace(std::move(ukey));
auto msg =
fmt::format("{} not supported on {}", cmdname, ifname);
log<level::INFO>(msg.c_str(),
entry("INTERFACE=%s", ifname.c_str()));
}
return ret;
}
throw;
}
unsupported.erase(ukey);
ret.emplace(complete(ifr));
return ret;
}
EthInfo getEthInfo(stdplus::zstring_view ifname)
{
ethtool_cmd edata = {};
edata.cmd = ETHTOOL_GSET;
return optionalIFReq(
ifname, SIOCETHTOOL, "ETHTOOL"sv,
[&](const ifreq&) {
return EthInfo{.autoneg = edata.autoneg != 0,
.speed = edata.speed};
},
&edata)
.value_or(EthInfo{});
}
bool intfIsRunning(std::string_view ifname)
{
return executeIFReq(ifname, SIOCGIFFLAGS).ifr_flags & IFF_RUNNING;
}
std::optional<unsigned> getMTU(stdplus::zstring_view ifname)
{
return optionalIFReq(ifname, SIOCGIFMTU, "GMTU",
[](const ifreq& ifr) { return ifr.ifr_mtu; });
}
void setMTU(std::string_view ifname, unsigned mtu)
{
auto ifr = makeIFReq(ifname);
ifr.ifr_mtu = mtu;
getIFSock().ioctl(SIOCSIFMTU, &ifr);
}
void setNICUp(std::string_view ifname, bool up)
{
ifreq ifr = executeIFReq(ifname, SIOCGIFFLAGS);
ifr.ifr_flags &= ~IFF_UP;
ifr.ifr_flags |= up ? IFF_UP : 0;
getIFSock().ioctl(SIOCSIFFLAGS, &ifr);
}
InterfaceInfo detail::parseInterface(const nlmsghdr& hdr, std::string_view msg)
{
if (hdr.nlmsg_type != RTM_NEWLINK)
{
throw std::runtime_error("Not an interface msg");
}
auto ifinfo = stdplus::raw::extract<ifinfomsg>(msg);
InterfaceInfo ret;
ret.flags = ifinfo.ifi_flags;
ret.idx = ifinfo.ifi_index;
while (!msg.empty())
{
auto [hdr, data] = netlink::extractRtAttr(msg);
if (hdr.rta_type == IFLA_IFNAME)
{
ret.name.emplace(data.begin(), data.end() - 1);
}
else if (hdr.rta_type == IFLA_ADDRESS)
{
if (data.size() != sizeof(ether_addr))
{
// Some interfaces have IP addresses for their LLADDR
continue;
}
ret.mac.emplace(stdplus::raw::copyFrom<ether_addr>(data));
}
else if (hdr.rta_type == IFLA_MTU)
{
ret.mtu.emplace(stdplus::raw::copyFrom<unsigned>(data));
}
}
return ret;
}
bool detail::validateNewInterface(const InterfaceInfo& info)
{
if (info.flags & IFF_LOOPBACK)
{
return false;
}
if (!info.name)
{
throw std::invalid_argument("Interface Dump missing name");
}
const auto& ignored = internal::getIgnoredInterfaces();
if (ignored.find(*info.name) != ignored.end())
{
return false;
}
return true;
}
std::vector<InterfaceInfo> getInterfaces()
{
std::vector<InterfaceInfo> ret;
auto cb = [&](const nlmsghdr& hdr, std::string_view msg) {
auto info = detail::parseInterface(hdr, msg);
if (detail::validateNewInterface(info))
{
ret.emplace_back(std::move(info));
}
};
ifinfomsg msg{};
netlink::performRequest(NETLINK_ROUTE, RTM_GETLINK, NLM_F_DUMP, msg, cb);
return ret;
}
} // namespace phosphor::network::system