From 213202edc9b5ae60eef2a915b83b4aa19b1c3617 Mon Sep 17 00:00:00 2001 From: Johan Hedberg Date: Sun, 27 Jan 2013 00:31:33 +0200 Subject: [PATCH] Bluetooth: Refactor UUID-16 list generation into its own function We will need to create three separate UUID lists in the EIR data (for 16, 32 and 128 bit UUIDs) so the code is easier to follow if each list is generated in their own function. Signed-off-by: Johan Hedberg Acked-by: Marcel Holtmann Signed-off-by: Gustavo Padovan --- net/bluetooth/mgmt.c | 78 ++++++++++++++++++++++++-------------------- 1 file changed, 43 insertions(+), 35 deletions(-) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 5e18d5a451f4..497928d2b257 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -435,11 +435,51 @@ static u32 get_current_settings(struct hci_dev *hdev) #define PNP_INFO_SVCLASS_ID 0x1200 +static u8 *create_uuid16_list(struct hci_dev *hdev, u8 *data, ptrdiff_t len) +{ + u8 *ptr = data, *uuids_start = NULL; + struct bt_uuid *uuid; + + if (len < 4) + return ptr; + + list_for_each_entry(uuid, &hdev->uuids, list) { + u16 uuid16; + + if (uuid->size != 16) + continue; + + uuid16 = get_unaligned_le16(&uuid->uuid[12]); + if (uuid16 < 0x1100) + continue; + + if (uuid16 == PNP_INFO_SVCLASS_ID) + continue; + + if (!uuids_start) { + uuids_start = ptr; + uuids_start[0] = 1; + uuids_start[1] = EIR_UUID16_ALL; + ptr += 2; + } + + /* Stop if not enough space to put next UUID */ + if ((ptr - data) + sizeof(u16) > len) { + uuids_start[1] = EIR_UUID16_SOME; + break; + } + + *ptr++ = (uuid16 & 0x00ff); + *ptr++ = (uuid16 & 0xff00) >> 8; + uuids_start[0] += sizeof(uuid16); + } + + return ptr; +} + static void create_eir(struct hci_dev *hdev, u8 *data) { u8 *ptr = data; - u8 *uuids_start; - struct bt_uuid *uuid; size_t name_len; name_len = strlen(hdev->dev_name); @@ -480,39 +520,7 @@ static void create_eir(struct hci_dev *hdev, u8 *data) ptr += 10; } - uuids_start = NULL; - - /* Group all UUID16 types */ - list_for_each_entry(uuid, &hdev->uuids, list) { - u16 uuid16; - - if (uuid->size != 16) - continue; - - uuid16 = get_unaligned_le16(&uuid->uuid[12]); - if (uuid16 < 0x1100) - continue; - - if (uuid16 == PNP_INFO_SVCLASS_ID) - continue; - - if (!uuids_start) { - uuids_start = ptr; - uuids_start[0] = 1; - uuids_start[1] = EIR_UUID16_ALL; - ptr += 2; - } - - /* Stop if not enough space to put next UUID */ - if ((ptr - data) + 2 + sizeof(u16) > HCI_MAX_EIR_LENGTH) { - uuids_start[1] = EIR_UUID16_SOME; - break; - } - - *ptr++ = (uuid16 & 0x00ff); - *ptr++ = (uuid16 & 0xff00) >> 8; - uuids_start[0] += sizeof(uuid16); - } + ptr = create_uuid16_list(hdev, ptr, HCI_MAX_EIR_LENGTH - (ptr - data)); } static int update_eir(struct hci_dev *hdev) -- GitLab