guint gatt_discover_char(GAttrib *attrib, uint16_t start, uint16_t end, bt_uuid_t *uuid, gatt_cb_t func, gpointer user_data) { size_t buflen; uint8_t *buf = g_attrib_get_buffer(attrib, &buflen); struct discover_char *dc; bt_uuid_t type_uuid; guint16 plen; bt_uuid16_create(&type_uuid, GATT_CHARAC_UUID); plen = enc_read_by_type_req(start, end, &type_uuid, buf, buflen); if (plen == 0) return 0; dc = g_try_new0(struct discover_char, 1); if (dc == NULL) return 0; dc->attrib = g_attrib_ref(attrib); dc->cb = func; dc->user_data = user_data; dc->end = end; dc->start = start; dc->uuid = g_memdup(uuid, sizeof(bt_uuid_t)); dc->id = g_attrib_send(attrib, 0, buf, plen, char_discovered_cb, discover_char_ref(dc), discover_char_unref); return dc->id; }
static void char_discovered_cb(guint8 status, const guint8 *ipdu, guint16 iplen, gpointer user_data) { struct discover_char *dc = user_data; struct att_data_list *list; unsigned int i, err = 0; uint16_t last = 0; uint8_t type; /* We have all the characteristic now, lets send it up */ if (status == ATT_ECODE_ATTR_NOT_FOUND) { err = dc->characteristics ? 0 : status; goto done; } if (status) { err = status; goto done; } list = dec_read_by_type_resp(ipdu, iplen); if (list == NULL) { err = ATT_ECODE_IO; goto done; } if (list->len == 7) type = BT_UUID16; else type = BT_UUID128; for (i = 0; i < list->num; i++) { uint8_t *value = list->data[i]; struct gatt_char *chars; bt_uuid_t uuid128; last = get_le16(value); get_uuid128(type, &value[5], &uuid128); if (dc->uuid && bt_uuid_cmp(dc->uuid, &uuid128)) continue; chars = g_try_new0(struct gatt_char, 1); if (!chars) { att_data_list_free(list); err = ATT_ECODE_INSUFF_RESOURCES; goto done; } chars->handle = last; chars->properties = value[2]; chars->value_handle = get_le16(&value[3]); bt_uuid_to_string(&uuid128, chars->uuid, sizeof(chars->uuid)); dc->characteristics = g_slist_append(dc->characteristics, chars); } att_data_list_free(list); /* * If last handle is lower from previous start handle then it is smth * wrong. Let's stop search, otherwise we might enter infinite loop. */ if (last < dc->start) { err = ATT_ECODE_UNLIKELY; goto done; } dc->start = last + 1; if (last != 0 && (dc->start < dc->end)) { bt_uuid_t uuid; guint16 oplen; size_t buflen; uint8_t *buf; buf = g_attrib_get_buffer(dc->attrib, &buflen); bt_uuid16_create(&uuid, GATT_CHARAC_UUID); oplen = enc_read_by_type_req(dc->start, dc->end, &uuid, buf, buflen); if (oplen == 0) return; g_attrib_send(dc->attrib, dc->id, buf, oplen, char_discovered_cb, discover_char_ref(dc), discover_char_unref); return; } done: dc->cb(err, dc->characteristics, dc->user_data); }
static void char_discovered_cb(guint8 status, const guint8 *ipdu, guint16 iplen, gpointer user_data) { struct discover_char *dc = user_data; struct att_data_list *list; unsigned int i, err = ATT_ECODE_ATTR_NOT_FOUND; uint16_t last = 0; uint8_t type; if (status) { err = status; goto done; } list = dec_read_by_type_resp(ipdu, iplen); if (list == NULL) { err = ATT_ECODE_IO; goto done; } if (list->len == 7) type = BT_UUID16; else type = BT_UUID128; for (i = 0; i < list->num; i++) { uint8_t *value = list->data[i]; struct gatt_char *chars; bt_uuid_t uuid128; last = get_le16(value); get_uuid128(type, &value[5], &uuid128); if (dc->uuid && bt_uuid_cmp(dc->uuid, &uuid128)) continue; chars = g_try_new0(struct gatt_char, 1); if (!chars) { att_data_list_free(list); err = ATT_ECODE_INSUFF_RESOURCES; goto done; } chars->handle = last; chars->properties = value[2]; chars->value_handle = get_le16(&value[3]); bt_uuid_to_string(&uuid128, chars->uuid, sizeof(chars->uuid)); dc->characteristics = g_slist_append(dc->characteristics, chars); } att_data_list_free(list); if (last != 0 && (last + 1 < dc->end)) { bt_uuid_t uuid; guint16 oplen; size_t buflen; uint8_t *buf; buf = g_attrib_get_buffer(dc->attrib, &buflen); bt_uuid16_create(&uuid, GATT_CHARAC_UUID); oplen = enc_read_by_type_req(last + 1, dc->end, &uuid, buf, buflen); if (oplen == 0) return; g_attrib_send(dc->attrib, dc->id, buf, oplen, char_discovered_cb, discover_char_ref(dc), discover_char_unref); return; } done: err = (dc->characteristics ? 0 : err); dc->cb(err, dc->characteristics, dc->user_data); }