> Hi Ankur, > > > Hello Folks, > > > > After implementing and running the test case for Characteristics Write > > Not Permitted Response (TC_GAW_SR_BI_15_C), it failed. Following the > > Trace, I found that Bluez (Controller) Sends ATT "Error Response: > > Write not Permitted" after receiving "Execute Write Request" from > > Host instead of sending the "Error Response" after receiving "Prepare > > Write Request" from Host. > > > > Current ATT Message Exchange (Host <> Controller) > > ---------------------------------------------------- > > Frame#41(H->C): Prepare Write Request > > Frame#43(C->H): Prepare Write Response > > Frame#44(H->C): Execute Write Request > > Frame#46(C->H): Error Response with code "Write Not Permitted" > > > > Expected ATT Message Exchange (Host <> Controller) > > ---------------------------------------------------- > > (H->C): Prepare Write Request > > (C->H): Error Response with code "Write Not Permitted" > > > > Please find the attached Trace Capture via PTS software as > > http://www.filedropper.com/tcgawsrbi15c20150523090341 > > > > Code Snippet (Registered Characteristic as below - for Write not > permitted): > > > > gatt_db_service_add_characteristic(service, &uuid, > > BT_ATT_PERM_READ | BT_ATT_PERM_WRITE, > > BT_GATT_CHRC_PROP_READ | BT_GATT_CHRC_PROP_WRITE, > > custom_ccc_read_cb, > custom_not_permi_resp_write_cb, > > server); > > > > PTS FAILS: > Here you are trying to write on a CHARC which is already given write > permission. > So, in this case BlueZ will send Success Prepare Write Response, which is > correct. > > PTS PASS: > But If you remove the write permission from above code snippet, Bluez will > send Write Not Permitted Error Response, which makes > TC_GAW_SR_BI_15_C PASS. > > For more info you can start tools/btgatt-server and emulate all services and > cross-check the functionality. > > Let others comment on this. > > > static void custom_not_permi_resp_write_cb(struct gatt_db_attribute > > *attrib, > > unsigned int id, uint16_t offset, const uint8_t > *value, size_t len, > > uint8_t opcode, struct bt_att *att, void > > *user_data) > { > > uint8_t ecode = 0x3; > > gatt_db_attribute_write_result(attrib, id, ecode); } > > > > Any idea on why Bluez is not sending the Error Response After Prepare > Write > > Request from Host? > > > > Regards, > > Ankur. > > -- > > Regards, > Gowtham Anandha Babu Thank you Gowtham Anandha Babu for brief & useful explanation. I understand your concern and my mistake. I did the same and now the Testcase is Passed. As you have mentioned, I am itself using tools/btgatt-server.c application and modifying it to pass the PTS/GATT testcases. Once I am done, I would like to share modified btgatt-server.c on forum so that anyone wants to pass PTS/GATT testcases, it will be useful. Appreciate your support, Ankur -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
