Function sys_setsockopt

components/lwp/lwp_syscall.c:5458–5484

* @brief Sets the value of a socket option. * * This system call sets a socket option for the specified socket. Socket options control various aspects * of socket behavior, such as timeouts, buffer sizes, or connection parameters. The option value is * provided in the `optval` buffer, and its length is specified by the `optlen` parameter. * * @param[in] socket The socket descriptor for w

 *          sized buffer could result in undefined behavior or errors.
 */
sysret_t sys_setsockopt(int socket, int level, int optname, const void *optval, socklen_t optlen)
{
    int ret;
    void *koptval = RT_NULL;

    if (!lwp_user_accessable((void *)optval, optlen))
        return -EFAULT;

    koptval = kmem_get(optlen);
    if (koptval == RT_NULL)
    {
        return -ENOMEM;
    }

    if (lwp_get_from_user(koptval, (void *)optval, optlen) != optlen)
    {
        kmem_put(koptval);
        return -EINVAL;
    }

    convert_sockopt(&level, &optname);
    ret = setsockopt(socket, level, optname, koptval, optlen);

    kmem_put(koptval);

    return (ret < 0 ? GET_ERRNO() : ret);
}

/**
 * @brief Establishes a connection to a remote socket.