blob: a2137cd5548c2453a077b623401f9a41331b55fb [file] [log] [blame]
#pragma once
#include "app/channel.hpp"
#include "transportconstants.hpp"
#include "user_channel/cipher_mgmt.hpp"
#include <ipmid/api-types.hpp>
#include <ipmid/api.hpp>
#include <ipmid/message.hpp>
#include <ipmid/message/types.hpp>
#include <ipmid/types.hpp>
#include <ipmid/utils.hpp>
#include <phosphor-logging/elog-errors.hpp>
#include <phosphor-logging/elog.hpp>
#include <phosphor-logging/log.hpp>
#include <sdbusplus/bus.hpp>
#include <sdbusplus/exception.hpp>
#include <stdplus/net/addr/ether.hpp>
#include <stdplus/net/addr/ip.hpp>
#include <stdplus/str/conv.hpp>
#include <stdplus/zstring_view.hpp>
#include <user_channel/channel_layer.hpp>
#include <xyz/openbmc_project/Common/error.hpp>
#include <xyz/openbmc_project/Network/EthernetInterface/server.hpp>
#include <xyz/openbmc_project/Network/IP/server.hpp>
#include <xyz/openbmc_project/Network/Neighbor/server.hpp>
#include <cinttypes>
#include <functional>
#include <optional>
#include <string>
#include <string_view>
#include <unordered_map>
#include <unordered_set>
#include <utility>
namespace ipmi
{
namespace transport
{
/** @brief The dbus parameters for the interface corresponding to a channel
* This helps reduce the number of mapper lookups we need for each
* query and simplifies finding the VLAN interface if needed.
*/
struct ChannelParams
{
/** @brief The channel ID */
int id;
/** @brief channel name for the interface */
std::string ifname;
/** @brief Name of the service on the bus */
std::string service;
/** @brief Lower level adapter path that is guaranteed to not be a VLAN */
std::string ifPath;
/** @brief Logical adapter path used for address assignment */
std::string logicalPath;
};
/** @brief Determines the ethernet interface name corresponding to a channel
* Tries to map a VLAN object first so that the address information
* is accurate. Otherwise it gets the standard ethernet interface.
*
* @param[in] bus - The bus object used for lookups
* @param[in] channel - The channel id corresponding to an ethernet interface
* @return Ethernet interface service and object path if it exists
*/
std::optional<ChannelParams>
maybeGetChannelParams(sdbusplus::bus_t& bus, uint8_t channel);
/** @brief A trivial helper around maybeGetChannelParams() that throws an
* exception when it is unable to acquire parameters for the channel.
*
* @param[in] bus - The bus object used for lookups
* @param[in] channel - The channel id corresponding to an ethernet interface
* @return Ethernet interface service and object path
*/
ChannelParams getChannelParams(sdbusplus::bus_t& bus, uint8_t channel);
/** @brief Trivializes using parameter getter functions by providing a bus
* and channel parameters automatically.
*
* @param[in] channel - The channel id corresponding to an ethernet interface
* ...
*/
template <auto func, typename... Args>
auto channelCall(uint8_t channel, Args&&... args)
{
sdbusplus::bus_t bus(ipmid_get_sd_bus_connection());
auto params = getChannelParams(bus, channel);
return std::invoke(func, bus, params, std::forward<Args>(args)...);
}
/** @brief Generic paramters for different address families */
template <int family>
struct AddrFamily
{};
/** @brief Parameter specialization for IPv4 */
template <>
struct AddrFamily<AF_INET>
{
using addr = stdplus::In4Addr;
static constexpr auto protocol =
sdbusplus::server::xyz::openbmc_project::network::IP::Protocol::IPv4;
static constexpr size_t maxStrLen = INET6_ADDRSTRLEN;
static constexpr uint8_t defaultPrefix = 32;
static constexpr char propertyGateway[] = "DefaultGateway";
};
/** @brief Parameter specialization for IPv6 */
template <>
struct AddrFamily<AF_INET6>
{
using addr = stdplus::In6Addr;
static constexpr auto protocol =
sdbusplus::server::xyz::openbmc_project::network::IP::Protocol::IPv6;
static constexpr size_t maxStrLen = INET6_ADDRSTRLEN;
static constexpr uint8_t defaultPrefix = 128;
static constexpr char propertyGateway[] = "DefaultGateway6";
};
/** @brief Interface Neighbor configuration parameters */
template <int family>
struct IfNeigh
{
std::string path;
typename AddrFamily<family>::addr ip;
stdplus::EtherAddr mac;
};
/** @brief Interface IP Address configuration parameters */
template <int family>
struct IfAddr
{
std::string path;
typename AddrFamily<family>::addr address;
sdbusplus::server::xyz::openbmc_project::network::IP::AddressOrigin origin;
uint8_t prefix;
};
/** @brief Valid address origins for IPv6 */
static inline const std::unordered_set<
sdbusplus::server::xyz::openbmc_project::network::IP::AddressOrigin>
originsV6Static = {sdbusplus::server::xyz::openbmc_project::network::IP::
AddressOrigin::Static};
static inline const std::unordered_set<
sdbusplus::server::xyz::openbmc_project::network::IP::AddressOrigin>
originsV6Dynamic = {
sdbusplus::server::xyz::openbmc_project::network::IP::AddressOrigin::
DHCP,
sdbusplus::server::xyz::openbmc_project::network::IP::AddressOrigin::
SLAAC,
};
/** @brief A lazy lookup mechanism for iterating over object properties stored
* in DBus. This will only perform the object lookup when needed, and
* retains a cache of previous lookups to speed up future iterations.
*/
class ObjectLookupCache
{
public:
using PropertiesCache = std::unordered_map<std::string, PropertyMap>;
/** @brief Creates a new ObjectLookupCache for the interface on the bus
* NOTE: The inputs to this object must outlive the object since
* they are only referenced by it.
*
* @param[in] bus - The bus object used for lookups
* @param[in] params - The parameters for the channel
* @param[in] intf - The interface we are looking up
*/
ObjectLookupCache(sdbusplus::bus_t& bus, const ChannelParams& params,
const char* intf) :
bus(bus), params(params), intf(intf),
objs(getAllDbusObjects(bus, params.logicalPath, intf, ""))
{}
class iterator : public ObjectTree::const_iterator
{
public:
using value_type = PropertiesCache::value_type;
iterator(ObjectTree::const_iterator it, ObjectLookupCache& container) :
ObjectTree::const_iterator(it), container(container),
ret(container.cache.end())
{}
value_type& operator*()
{
ret = container.get(ObjectTree::const_iterator::operator*().first);
return *ret;
}
value_type* operator->()
{
return &operator*();
}
private:
ObjectLookupCache& container;
PropertiesCache::iterator ret;
};
iterator begin() noexcept
{
return iterator(objs.begin(), *this);
}
iterator end() noexcept
{
return iterator(objs.end(), *this);
}
private:
sdbusplus::bus_t& bus;
const ChannelParams& params;
const char* const intf;
const ObjectTree objs;
PropertiesCache cache;
/** @brief Gets a cached copy of the object properties if possible
* Otherwise performs a query on DBus to look them up
*
* @param[in] path - The object path to lookup
* @return An iterator for the specified object path + properties
*/
PropertiesCache::iterator get(const std::string& path)
{
auto it = cache.find(path);
if (it != cache.end())
{
return it;
}
auto properties = getAllDbusProperties(bus, params.service, path, intf);
return cache.insert({path, std::move(properties)}).first;
}
};
/** @brief Searches the ip object lookup cache for an address matching
* the input parameters. NOTE: The index lacks stability across address
* changes since the network daemon has no notion of stable indicies.
*
* @param[in] bus - The bus object used for lookups
* @param[in] params - The parameters for the channel
* @param[in] idx - The index of the desired address on the interface
* @param[in] origins - The allowed origins for the address objects
* @param[in] ips - The object lookup cache holding all of the address info
* @return The address and prefix if it was found
*/
template <int family>
std::optional<IfAddr<family>> findIfAddr(
[[maybe_unused]] sdbusplus::bus_t& bus,
[[maybe_unused]] const ChannelParams& params, uint8_t idx,
const std::unordered_set<
sdbusplus::server::xyz::openbmc_project::network::IP::AddressOrigin>&
origins,
ObjectLookupCache& ips)
{
for (const auto& [path, properties] : ips)
{
std::optional<typename AddrFamily<family>::addr> addr;
try
{
addr.emplace(stdplus::fromStr<typename AddrFamily<family>::addr>(
std::get<std::string>(properties.at("Address"))));
}
catch (...)
{
continue;
}
sdbusplus::server::xyz::openbmc_project::network::IP::AddressOrigin
origin = sdbusplus::server::xyz::openbmc_project::network::IP::
convertAddressOriginFromString(
std::get<std::string>(properties.at("Origin")));
if (origins.find(origin) == origins.end())
{
continue;
}
if (idx > 0)
{
idx--;
continue;
}
IfAddr<family> ifaddr;
ifaddr.path = path;
ifaddr.address = *addr;
ifaddr.prefix = std::get<uint8_t>(properties.at("PrefixLength"));
ifaddr.origin = origin;
return ifaddr;
}
return std::nullopt;
}
/** @brief Trivial helper around findIfAddr that simplifies calls
* for one off lookups. Don't use this if you intend to do multiple
* lookups at a time.
*
* @param[in] bus - The bus object used for lookups
* @param[in] params - The parameters for the channel
* @param[in] idx - The index of the desired address on the interface
* @param[in] origins - The allowed origins for the address objects
* @return The address and prefix if it was found
*/
template <int family>
auto getIfAddr(
sdbusplus::bus_t& bus, const ChannelParams& params, uint8_t idx,
const std::unordered_set<
sdbusplus::server::xyz::openbmc_project::network::IP::AddressOrigin>&
origins)
{
ObjectLookupCache ips(bus, params, INTF_IP);
return findIfAddr<family>(bus, params, idx, origins, ips);
}
/** @brief Reconfigures the IPv6 address info configured for the interface
*
* @param[in] bus - The bus object used for lookups
* @param[in] params - The parameters for the channel
* @param[in] idx - The address index to operate on
* @param[in] address - The new address
* @param[in] prefix - The new address prefix
*/
void reconfigureIfAddr6(sdbusplus::bus_t& bus, const ChannelParams& params,
uint8_t idx, stdplus::In6Addr address, uint8_t prefix);
/** @brief Retrieves the current gateway for the address family on the system
* NOTE: The gateway is per channel instead of the system wide one.
*
* @param[in] bus - The bus object used for lookups
* @param[in] params - The parameters for the channel
* @return An address representing the gateway address if it exists
*/
template <int family>
std::optional<typename AddrFamily<family>::addr>
getGatewayProperty(sdbusplus::bus_t& bus, const ChannelParams& params)
{
auto objPath = "/xyz/openbmc_project/network/" + params.ifname;
auto gatewayStr = std::get<std::string>(
getDbusProperty(bus, params.service, objPath, INTF_ETHERNET,
AddrFamily<family>::propertyGateway));
if (gatewayStr.empty())
{
return std::nullopt;
}
return stdplus::fromStr<typename AddrFamily<family>::addr>(gatewayStr);
}
template <int family>
std::optional<IfNeigh<family>> findStaticNeighbor(
sdbusplus::bus_t&, const ChannelParams&,
typename AddrFamily<family>::addr ip, ObjectLookupCache& neighbors)
{
using sdbusplus::server::xyz::openbmc_project::network::Neighbor;
const auto state =
sdbusplus::common::xyz::openbmc_project::network::convertForMessage(
Neighbor::State::Permanent);
for (const auto& [path, neighbor] : neighbors)
{
std::optional<typename AddrFamily<family>::addr> neighIP;
try
{
neighIP.emplace(stdplus::fromStr<typename AddrFamily<family>::addr>(
std::get<std::string>(neighbor.at("IPAddress"))));
}
catch (...)
{
continue;
}
if (*neighIP != ip)
{
continue;
}
if (state != std::get<std::string>(neighbor.at("State")))
{
continue;
}
IfNeigh<family> ret;
ret.path = path;
ret.ip = ip;
ret.mac = stdplus::fromStr<stdplus::EtherAddr>(
std::get<std::string>(neighbor.at("MACAddress")));
return ret;
}
return std::nullopt;
}
template <int family>
void createNeighbor(sdbusplus::bus_t& bus, const ChannelParams& params,
typename AddrFamily<family>::addr address,
stdplus::EtherAddr mac)
{
auto newreq =
bus.new_method_call(params.service.c_str(), params.logicalPath.c_str(),
INTF_NEIGHBOR_CREATE_STATIC, "Neighbor");
stdplus::ToStrHandle<stdplus::ToStr<stdplus::EtherAddr>> macToStr;
stdplus::ToStrHandle<stdplus::ToStr<typename AddrFamily<family>::addr>>
addrToStr;
newreq.append(addrToStr(address), macToStr(mac));
bus.call_noreply(newreq);
}
/** @brief Deletes the dbus object. Ignores empty objects or objects that are
* missing from the bus.
*
* @param[in] bus - The bus object used for lookups
* @param[in] service - The name of the service
* @param[in] path - The path of the object to delete
*/
void deleteObjectIfExists(sdbusplus::bus_t& bus, const std::string& service,
const std::string& path);
/** @brief Sets the value for the default gateway of the channel
*
* @param[in] bus - The bus object used for lookups
* @param[in] params - The parameters for the channel
* @param[in] gateway - Gateway address to apply
*/
template <int family>
void setGatewayProperty(sdbusplus::bus_t& bus, const ChannelParams& params,
typename AddrFamily<family>::addr address)
{
// Save the old gateway MAC address if it exists so we can recreate it
auto gateway = getGatewayProperty<family>(bus, params);
std::optional<IfNeigh<family>> neighbor;
if (gateway)
{
ObjectLookupCache neighbors(bus, params, INTF_NEIGHBOR);
neighbor = findStaticNeighbor<family>(bus, params, *gateway, neighbors);
}
auto objPath = "/xyz/openbmc_project/network/" + params.ifname;
setDbusProperty(bus, params.service, objPath, INTF_ETHERNET,
AddrFamily<family>::propertyGateway,
stdplus::toStr(address));
// Restore the gateway MAC if we had one
if (neighbor)
{
deleteObjectIfExists(bus, params.service, neighbor->path);
createNeighbor<family>(bus, params, address, neighbor->mac);
}
}
} // namespace transport
} // namespace ipmi