oem/ibm/libpldmresponder/utils.cpp

#include "utils.hpp"

#include "common/utils.hpp"

#include <libpldm/base.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <unistd.h>

#include <phosphor-logging/lg2.hpp>
#include <xyz/openbmc_project/Inventory/Decorator/Asset/client.hpp>
#include <xyz/openbmc_project/Inventory/Item/Connector/client.hpp>
#include <xyz/openbmc_project/ObjectMapper/client.hpp>

PHOSPHOR_LOG2_USING;

namespace pldm
{
namespace responder
{
namespace utils
{
int setupUnixSocket(const std::string& socketInterface)
{
    int sock;
    struct sockaddr_un addr;
    memset(&addr, 0, sizeof(addr));
    addr.sun_family = AF_UNIX;
    size_t interfaceLength = strnlen(socketInterface.c_str(),
                                     sizeof(addr.sun_path));
    if (interfaceLength == sizeof(addr.sun_path))
    {
        error("Setup unix socket path '{PATH}' is too long '{LENGTH}'", "PATH",
              socketInterface, "LENGTH", interfaceLength);
        return -1;
    }

    strncpy(addr.sun_path, socketInterface.c_str(), sizeof(addr.sun_path) - 1);

    if ((sock = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, 0)) == -1)
    {
        error("Failed to open unix socket");
        return -1;
    }

    if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) == -1)
    {
        error("Failed to bind unix socket, error number - {ERROR_NUM}",
              "ERROR_NUM", errno);
        close(sock);
        return -1;
    }

    if (listen(sock, 1) == -1)
    {
        error("Failed listen() call while setting up unix socket");
        close(sock);
        return -1;
    }

    fd_set rfd;
    struct timeval tv;
    tv.tv_sec = 1;
    tv.tv_usec = 0;

    FD_ZERO(&rfd);
    FD_SET(sock, &rfd);
    int nfd = sock + 1;
    int fd = -1;

    int retval = select(nfd, &rfd, NULL, NULL, &tv);
    if (retval < 0)
    {
        error(
            "Failed select() call while setting up unix socket, error number - {ERROR_NUM}",
            "ERROR_NUM", errno);
        close(sock);
        return -1;
    }

    if ((retval > 0) && (FD_ISSET(sock, &rfd)))
    {
        fd = accept(sock, NULL, NULL);
        if (fd < 0)
        {
            error(
                "Failed accept() call while setting up unix socket, error number - {ERROR_NUM}",
                "ERROR_NUM", errno);
            close(sock);
            return -1;
        }
        close(sock);
    }
    return fd;
}

int writeToUnixSocket(const int sock, const char* buf, const uint64_t blockSize)
{
    uint64_t i;
    int nwrite = 0;

    for (i = 0; i < blockSize; i = i + nwrite)
    {
        fd_set wfd;
        struct timeval tv;
        tv.tv_sec = 1;
        tv.tv_usec = 0;

        FD_ZERO(&wfd);
        FD_SET(sock, &wfd);
        int nfd = sock + 1;

        int retval = select(nfd, NULL, &wfd, NULL, &tv);
        if (retval < 0)
        {
            error(
                "Failed to write to unix socket select, error number - {ERROR_NUM}",
                "ERROR_NUM", errno);
            close(sock);
            return -1;
        }
        if (retval == 0)
        {
            nwrite = 0;
            continue;
        }
        if ((retval > 0) && (FD_ISSET(sock, &wfd)))
        {
            nwrite = write(sock, buf + i, blockSize - i);
            if (nwrite < 0)
            {
                if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
                {
                    error(
                        "Failed to write to unix socket, error number - {ERROR_NUM}",
                        "ERROR_NUM", errno);
                    nwrite = 0;
                    continue;
                }
                error(
                    "Failed to write to unix socket, error number - {ERROR_NUM}",
                    "ERROR_NUM", errno);
                close(sock);
                return -1;
            }
        }
        else
        {
            nwrite = 0;
        }
    }
    return 0;
}

bool checkIfIBMFru(const std::string& objPath)
{
    using DecoratorAsset =
        sdbusplus::client::xyz::openbmc_project::inventory::decorator::Asset<>;

    try
    {
        auto propVal = pldm::utils::DBusHandler().getDbusPropertyVariant(
            objPath.c_str(), "Model", DecoratorAsset::interface);
        const auto& model = std::get<std::string>(propVal);
        if (!model.empty())
        {
            return true;
        }
    }
    catch (const std::exception&)
    {
        return false;
    }
    return false;
}

std::vector<std::string> findPortObjects(const std::string& adapterObjPath)
{
    using ItemConnector =
        sdbusplus::client::xyz::openbmc_project::inventory::item::Connector<>;

    std::vector<std::string> portObjects;
    try
    {
        portObjects = pldm::utils::DBusHandler().getSubTreePaths(
            adapterObjPath, 0,
            std::vector<std::string>({ItemConnector::interface}));
    }
    catch (const std::exception& e)
    {
        error("No ports under adapter '{ADAPTER_OBJ_PATH}'  - {ERROR}.",
              "ADAPTER_OBJ_PATH", adapterObjPath.c_str(), "ERROR", e);
    }

    return portObjects;
}
} // namespace utils
} // namespace responder
} // namespace pldm