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NFC: digital: Ensure no NAD byte in DEP_REQ and DEP_RES frames

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According to chapter 14 of the NFC-DEP Digital
Protocol Spec., the NAD byte should never be
present in DEP_REQ or DEP_RES frames.  However,
this is not enforced so add that enforcement code.

Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com>
Tested-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark A. Greer 2014-09-23 16:38:06 -07:00 committed by Samuel Ortiz
parent 05afedcb89
commit 3e6b0de805
1 changed files with 10 additions and 0 deletions
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10
net/nfc/digital_dep.c
View file

@ -420,6 +420,11 @@ static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg,
goto error; goto error;
} }
if (DIGITAL_NFC_DEP_NAD_BIT_SET(pfb)) {
rc = -EIO;
goto exit;
}
if (size > resp->len) { if (size > resp->len) {
rc = -EIO; rc = -EIO;
goto error; goto error;
@ -572,6 +577,11 @@ static void digital_tg_recv_dep_req(struct nfc_digital_dev *ddev, void *arg,
goto exit; goto exit;
} }
if (DIGITAL_NFC_DEP_NAD_BIT_SET(pfb)) {
rc = -EIO;
goto exit;
}
if (size > resp->len) { if (size > resp->len) {
rc = -EIO; rc = -EIO;
goto exit; goto exit;