blob: 64944db85f3bdad425f51b4e648f0a34d28ace6c [file] [log] [blame]
#include "host-ipmid/oemrouter.hpp"
#include <cstdio>
#include <cstring>
#include <map>
#include <utility>
namespace oem
{
using Key = std::pair<Number, ipmi_cmd_t>;
// Private implementation of OemRouter Interface.
class RouterImpl : public Router
{
public:
RouterImpl()
{
}
// Implement OemRouter Interface.
void activate() override;
void registerHandler(Number oen, ipmi_cmd_t cmd, Handler handler) override;
// Actual message routing function.
ipmi_ret_t routeMsg(ipmi_cmd_t cmd, const uint8_t* reqBuf,
uint8_t* replyBuf, size_t* dataLen);
private:
std::map<Key, Handler> handlers;
};
// Static global instance for simplicity.
static RouterImpl* globalRouterImpl;
// TODO Refactor ipmid to avoid need for singleton here.
Router* mutableRouter()
{
if (!globalRouterImpl)
{
globalRouterImpl = new RouterImpl;
}
return globalRouterImpl;
}
ipmi_ret_t RouterImpl::routeMsg(ipmi_cmd_t cmd, const uint8_t* reqBuf,
uint8_t* replyBuf, size_t* dataLen)
{
// Not entirely clear we can route reply without complete OEM group.
// TODO: consider adding a way to suppress malformed replies.
if (*dataLen < groupMagicSize)
{
fprintf(stderr, "NetFn:[0x2E], OEM:[%zu bytes?], Cmd:[%#04X]\n",
*dataLen, cmd);
(*dataLen) = 0;
return IPMI_CC_REQ_DATA_LEN_INVALID;
}
// Find registered handler or reject request.
auto number = toOemNumber(reqBuf);
auto cmdKey = std::make_pair(number, cmd);
auto iter = handlers.find(cmdKey);
if (iter == handlers.end())
{
auto wildKey = std::make_pair(number, IPMI_CMD_WILDCARD);
iter = handlers.find(wildKey);
if (iter == handlers.end())
{
fprintf(stderr,
"No Registered handler for NetFn:[0x2E], "
"OEM:[%#08X], Cmd:[%#04X]\n",
number, cmd);
*dataLen = groupMagicSize;
return IPMI_CC_INVALID;
}
#ifdef __IPMI_DEBUG__
fprintf(stderr, "Wildcard NetFn:[0x2E], OEM:[%#08X], Cmd:[%#04X]\n",
number, cmd);
#endif
}
else
{
#ifdef __IPMI_DEBUG__
fprintf(stderr, "Match NetFn:[0x2E], OEM:[%#08X], Cmd:[%#04X]\n",
number, cmd);
#endif
}
// Copy OEMGroup here, by analogy to IPMI CC code at netfn router;
// OemHandler should deal only with optional following data bytes.
std::memcpy(replyBuf, reqBuf, groupMagicSize);
size_t oemDataLen = *dataLen - groupMagicSize;
Handler& handler = iter->second;
auto rc = handler(cmd, reqBuf + groupMagicSize, replyBuf + groupMagicSize,
&oemDataLen);
// Add OEMGroup bytes to nominal reply.
*dataLen = oemDataLen + groupMagicSize;
return rc;
}
// Function suitable for use as ipmi_netfn_router() call-back.
// Translates call-back pointer args to more specific types.
ipmi_ret_t ipmi_oem_wildcard_handler(ipmi_netfn_t /* netfn */, ipmi_cmd_t cmd,
ipmi_request_t request,
ipmi_response_t response,
ipmi_data_len_t dataLen,
ipmi_context_t context)
{
// View requests & responses as byte sequences.
const uint8_t* reqBuf = static_cast<uint8_t*>(request);
uint8_t* replyBuf = static_cast<uint8_t*>(response);
// View context as router object, defaulting nullptr to global object.
auto router = static_cast<RouterImpl*>(context ? context : mutableRouter());
// Send message parameters to dispatcher.
return router->routeMsg(cmd, reqBuf, replyBuf, dataLen);
}
// Enable message routing to begin.
void RouterImpl::activate()
{
// Register netfn 0x2e OEM Group, any (wildcard) command.
printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n", NETFUN_OEM_GROUP,
IPMI_CMD_WILDCARD);
ipmi_register_callback(NETFUN_OEM_GROUP, IPMI_CMD_WILDCARD, this,
ipmi_oem_wildcard_handler, PRIVILEGE_OEM);
}
void RouterImpl::registerHandler(Number oen, ipmi_cmd_t cmd, Handler handler)
{
auto cmdKey = std::make_pair(oen, cmd);
auto iter = handlers.find(cmdKey);
if (iter == handlers.end())
{
// Add handler if key not already taken.
handlers.emplace(cmdKey, handler);
}
else
{
fprintf(stderr,
"ERROR : Duplicate registration for NetFn:[0x2E], "
"OEM:[%#08X], Cmd:[%#04X]\n",
oen, cmd);
}
}
} // namespace oem