From c5aa5feebf558df160772fefaf271a6f3251e261 Mon Sep 17 00:00:00 2001 From: Jakub Pawlowski Date: Thu, 6 Jun 2019 13:54:55 +0200 Subject: [PATCH] DO NOT MERGE Fix for Bluetooth connection being dropped after HCI Read Encryption Key Size If remote device stop the encryption before we call "Read Encryption Key Size", we might receive Insufficient Security, which means that link is no longer encrypted. In such cases we should stay connected, rather than disconnecting the link. Test: Connect to device that stop encryption right after encryption is complete, i.e. to change roles. Bug: 124301137 Bug: 132626699 Change-Id: Iab0fd9f357d18a6b048b971d0393fbb47fd4d793 Merged-In: Iab0fd9f357d18a6b048b971d0393fbb47fd4d793 --- stack/btu/btu_hcif.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/stack/btu/btu_hcif.c b/stack/btu/btu_hcif.c index 3c09c259c..e10630ef4 100644 --- a/stack/btu/btu_hcif.c +++ b/stack/btu/btu_hcif.c @@ -607,6 +607,15 @@ bool read_key_send_from_key_refresh = false; static void read_encryption_key_size_complete_after_key_refresh( uint8_t status, uint16_t handle, uint8_t key_size) { + if (status == HCI_ERR_INSUFFCIENT_SECURITY) { + /* If remote device stop the encryption before we call "Read Encryption Key + * Size", we might receive Insufficient Security, which means that link is + * no longer encrypted. */ + HCI_TRACE_WARNING("%s encryption stopped on link: 0x%02x", __func__, + handle); + return; + } + if (status != HCI_SUCCESS) { HCI_TRACE_WARNING("%s: disconnecting, status: 0x%02x", __func__, status); btsnd_hcic_disconnect(handle, HCI_ERR_PEER_USER); @@ -629,6 +638,15 @@ static void read_encryption_key_size_complete_after_key_refresh( static void read_encryption_key_size_complete_after_encryption_change( uint8_t status, uint16_t handle, uint8_t key_size) { + if (status == HCI_ERR_INSUFFCIENT_SECURITY) { + /* If remote device stop the encryption before we call "Read Encryption Key + * Size", we might receive Insufficient Security, which means that link is + * no longer encrypted. */ + HCI_TRACE_WARNING("%s encryption stopped on link: 0x%02x", __func__, + handle); + return; + } + if (status != HCI_SUCCESS) { HCI_TRACE_WARNING("%s: disconnecting, status: 0x%02x", __func__, status); btsnd_hcic_disconnect(handle, HCI_ERR_PEER_USER); -- 2.11.0