Return-Path: From: Andrzej Kaczmarek To: CC: Andrzej Kaczmarek Subject: [RFC 04/18] cyclingspeed: Discover characteristics CCC Date: Thu, 25 Oct 2012 16:43:34 +0200 Message-ID: <1351176228-5789-5-git-send-email-andrzej.kaczmarek@tieto.com> In-Reply-To: <1351176228-5789-1-git-send-email-andrzej.kaczmarek@tieto.com> References: <1351176228-5789-1-git-send-email-andrzej.kaczmarek@tieto.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-bluetooth-owner@vger.kernel.org List-ID: --- profiles/cyclingspeed/cyclingspeed.c | 82 +++++++++++++++++++++++++++++++++++- 1 file changed, 80 insertions(+), 2 deletions(-) diff --git a/profiles/cyclingspeed/cyclingspeed.c b/profiles/cyclingspeed/cyclingspeed.c index 5744891..0191f1b 100644 --- a/profiles/cyclingspeed/cyclingspeed.c +++ b/profiles/cyclingspeed/cyclingspeed.c @@ -52,9 +52,15 @@ struct csc { struct att_range *svc_range; + uint16_t measurement_ccc_handle; uint16_t controlpoint_val_handle; }; +struct characteristic { + struct csc *csc; + char uuid[MAX_LEN_UUID_STR + 1]; +}; + static GSList *csc_adapters = NULL; static gint cmp_adapter(gconstpointer a, gconstpointer b) @@ -111,6 +117,76 @@ static void destroy_csc(gpointer user_data) g_free(csc); } +static void discover_desc_cb(guint8 status, const guint8 *pdu, + guint16 len, gpointer user_data) +{ + struct characteristic *ch = user_data; + struct att_data_list *list = NULL; + uint8_t format; + int i; + + if (status != 0) { + error("Discover %s descriptors failed: %s", ch->uuid, + att_ecode2str(status)); + goto done; + } + + list = dec_find_info_resp(pdu, len, &format); + if (list == NULL) + goto done; + + if (format != ATT_FIND_INFO_RESP_FMT_16BIT) + goto done; + + for (i = 0; i < list->num; i++) { + uint8_t *value; + uint16_t handle, uuid; + + value = list->data[i]; + handle = att_get_u16(value); + uuid = att_get_u16(value + 2); + + if (uuid != GATT_CLIENT_CHARAC_CFG_UUID) + continue; + + if (g_strcmp0(ch->uuid, CSC_MEASUREMENT_UUID) == 0) + ch->csc->measurement_ccc_handle = handle; + + /* We only want CCC, can break here */ + break; + } + +done: + if (list) + att_data_list_free(list); + g_free(ch); +} + +static void discover_desc(struct csc *csc, struct gatt_char *c, + struct gatt_char *c_next) +{ + struct characteristic *ch; + uint16_t start, end; + + start = c->value_handle + 1; + + if (c_next != NULL) { + if (start == c_next->handle) + return; + end = c_next->handle - 1; + } else if (c->value_handle != csc->svc_range->end) { + end = csc->svc_range->end; + } else { + return; + } + + ch = g_new0(struct characteristic, 1); + ch->csc = csc; + memcpy(ch->uuid, c->uuid, sizeof(c->uuid)); + + gatt_find_info(csc->attrib, start, end, discover_desc_cb, ch); +} + static void discover_char_cb(GSList *chars, guint8 status, gpointer user_data) { struct csc *csc = user_data; @@ -123,9 +199,11 @@ static void discover_char_cb(GSList *chars, guint8 status, gpointer user_data) for (; chars; chars = chars->next) { struct gatt_char *c = chars->data; + struct gatt_char *c_next = + (chars->next ? chars->next->data : NULL); if (g_strcmp0(c->uuid, CSC_MEASUREMENT_UUID) == 0) { - /* TODO: discover CCC handle */ + discover_desc(csc, c, c_next); } else if (g_strcmp0(c->uuid, CSC_FEATURE_UUID) == 0) { /* TODO: read characterictic value */ } else if (g_strcmp0(c->uuid, SENSOR_LOCATION_UUID) == 0) { @@ -134,7 +212,7 @@ static void discover_char_cb(GSList *chars, guint8 status, gpointer user_data) } else if (g_strcmp0(c->uuid, SC_CONTROL_POINT_UUID) == 0) { DBG("SC Control Point supported"); csc->controlpoint_val_handle = c->value_handle; - /* TODO: discover CCC handle */ + discover_desc(csc, c, c_next); } } } -- 1.8.0