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))) {
+ 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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