On Fri, Jan 31, 2014 at 12:32 PM, Frank Praznik <frank.praznik@xxxxxxxxx> wrote:
> Add a new HIDIOCGRAWCLIENTADDR ioctl to hidraw for retrieving the client
> address.
>
> Signed-off-by: Frank Praznik <frank.praznik@xxxxxxxxx>
> ---
> drivers/hid/hidraw.c | 19 +++++++++++++++++++
> include/uapi/linux/hidraw.h | 1 +
> 2 files changed, 20 insertions(+)
>
> diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
> index cb0137b..07c328b 100644
> --- a/drivers/hid/hidraw.c
> +++ b/drivers/hid/hidraw.c
> @@ -447,6 +447,25 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd,
> -EFAULT : len;
> break;
> }
> +
> + if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWCLIENTADDR(0))) {
Maybe we are just lacking an ioctl to retrieve hid->uniq...
Cheers,
Benjamin
> + char addr_str[32];
> + int len;
> + ret = snprintf(addr_str, sizeof(addr_str),
> + "%pMR", hid->client_addr);
> + if (ret < 0)
> + break;
> + else if (ret > sizeof(addr_str)-1)
> + len = sizeof(addr_str);
> + else
> + len = ret + 1;
> +
> + if (len > _IOC_SIZE(cmd))
> + len = _IOC_SIZE(cmd);
> + ret = copy_to_user(user_arg, addr_str, len) ?
> + -EFAULT : len;
> + break;
> + }
> }
>
> ret = -ENOTTY;
> diff --git a/include/uapi/linux/hidraw.h b/include/uapi/linux/hidraw.h
> index f5b7329..5b6f4fa 100644
> --- a/include/uapi/linux/hidraw.h
> +++ b/include/uapi/linux/hidraw.h
> @@ -38,6 +38,7 @@ struct hidraw_devinfo {
> /* The first byte of SFEATURE and GFEATURE is the report number */
> #define HIDIOCSFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
> #define HIDIOCGFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
> +#define HIDIOCGRAWCLIENTADDR(len) _IOC(_IOC_READ, 'H', 0x08, len)
>
> #define HIDRAW_FIRST_MINOR 0
> #define HIDRAW_MAX_DEVICES 64
> --
> 1.8.5.3
>
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