[Qemu-devel] [PATCH v4] bt: check struct sizes

[Qemu-devel] [PATCH v4] bt: check struct sizes

[Paolo Bonzini]

See http://permalink.gmane.org/gmane.linux.bluez.kernel/36505.  For historical
reasons these do not use sizeof, and Coverity caught a mistake in
EVT_ENCRYPT_CHANGE_SIZE.

In addition:

- remove status from create_conn_cancel_cp; the "status" field is only
in rp structs.  Note that this means that the OCF_CREATE_CONN_CANCEL
could never have worked (it would have failed the LENGTH_CHECK), but
I am keeping it anyway.

- remove read_link_quality_cp altogether; it's off by two, BlueZ doesn't
know about it and it seems like a wrong copy of read_link_policy_cp;

- fix inquiry_info which is shorter by one: the kernel has a struct that
is 14 byte long, but not counting the initial num_responses byte which
the kernel parses separately;

- remove extended_inquiry_info altogether, since it's not used and unlike
the other inquiry structs does not have the initial num_responses byte.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/hw/bt.h | 24 +++---------------------
 1 file changed, 3 insertions(+), 21 deletions(-)

diff --git a/include/hw/bt.h b/include/hw/bt.h
index cb2a7e6..706869f 100644
--- a/include/hw/bt.h
+++ b/include/hw/bt.h
@@ -504,7 +504,6 @@ typedef struct {
 
 #define OCF_CREATE_CONN_CANCEL		0x0008
 typedef struct {
-    uint8_t	status;
     bdaddr_t	bdaddr;
 } QEMU_PACKED create_conn_cancel_cp;
 #define CREATE_CONN_CANCEL_CP_SIZE 6
@@ -1266,15 +1265,10 @@ typedef struct {
     uint8_t	status;
     uint16_t	handle;
 } QEMU_PACKED reset_failed_contact_counter_rp;
-#define RESET_FAILED_CONTACT_COUNTER_RP_SIZE 4
+#define RESET_FAILED_CONTACT_COUNTER_RP_SIZE 3
 
 #define OCF_READ_LINK_QUALITY		0x0003
 typedef struct {
-    uint16_t	handle;
-} QEMU_PACKED read_link_quality_cp;
-#define READ_LINK_QUALITY_CP_SIZE 4
-
-typedef struct {
     uint8_t	status;
     uint16_t	handle;
     uint8_t	link_quality;
@@ -1332,7 +1326,7 @@ typedef struct {
     uint8_t	dev_class[3];
     uint16_t	clock_offset;
 } QEMU_PACKED inquiry_info;
-#define INQUIRY_INFO_SIZE 14
+#define INQUIRY_INFO_SIZE 15
 
 #define EVT_CONN_COMPLETE		0x03
 typedef struct {
@@ -1381,7 +1375,7 @@ typedef struct {
     uint16_t	handle;
     uint8_t	encrypt;
 } QEMU_PACKED evt_encrypt_change;
-#define EVT_ENCRYPT_CHANGE_SIZE 5
+#define EVT_ENCRYPT_CHANGE_SIZE 4
 
 #define EVT_CHANGE_CONN_LINK_KEY_COMPLETE	0x09
 typedef struct {
@@ -1629,18 +1623,6 @@ typedef struct {
 } QEMU_PACKED evt_sniff_subrate;
 #define EVT_SNIFF_SUBRATE_SIZE 11
 
-#define EVT_EXTENDED_INQUIRY_RESULT	0x2F
-typedef struct {
-    bdaddr_t	bdaddr;
-    uint8_t	pscan_rep_mode;
-    uint8_t	pscan_period_mode;
-    uint8_t	dev_class[3];
-    uint16_t	clock_offset;
-    int8_t	rssi;
-    uint8_t	data[240];
-} QEMU_PACKED extended_inquiry_info;
-#define EXTENDED_INQUIRY_INFO_SIZE 254
-
 #define EVT_TESTING			0xFE
 
 #define EVT_VENDOR			0xFF
-- 
2.5.0