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-rw-r--r--uds-ble-id-init-service/src/aia-uds-bluez.c607
1 files changed, 607 insertions, 0 deletions
diff --git a/uds-ble-id-init-service/src/aia-uds-bluez.c b/uds-ble-id-init-service/src/aia-uds-bluez.c
new file mode 100644
index 0000000..35ba61d
--- /dev/null
+++ b/uds-ble-id-init-service/src/aia-uds-bluez.c
@@ -0,0 +1,607 @@
+/*
+ * Copyright (C) 2015, 2016, 2017 "IoT.bzh"
+ * Author: José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define _GNU_SOURCE
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+
+#include <systemd/sd-bus.h>
+
+#include "aia-uds-bluez.h"
+
+#define ROOT "/uds"
+
+#define ITF_SERVICE "org.bluez.GattService1"
+#define ITF_CHARACTERISTIC "org.bluez.GattCharacteristic1"
+#define ITF_DESCRIPTOR "org.bluez.GattDescriptor1"
+
+/****** internal types **********/
+
+struct item
+{
+ const char *uuid;
+ const char *path;
+ struct item *parent;
+ struct aia_uds_value *value;
+};
+
+/****** internal data **********/
+
+static sd_bus *busini;
+static int activation;
+
+static aia_uds_on_change on_change_callback;
+
+static struct aia_uds uds;
+
+static struct aia_uds uds_descs =
+{
+ .first_name = { .data = "First name of the user" },
+ .last_name = { .data = "Last name of the user" },
+ .email = { .data = "Email of the user" },
+ .language = { .data = "The Language definition is based on ISO639-1" }
+};
+
+static struct aia_uds_value woutf8 = { .data = "\031\000\047\000\001\000\000", .length = 7 };
+
+static struct item services[1] =
+{
+ {
+ .uuid = "0000181C-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0"
+ }
+};
+
+static struct item characteristics[4] =
+{
+ {
+ .uuid = "00002A8A-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char0",
+ .parent = &services[0],
+ .value = &uds.first_name
+ }, {
+ .uuid = "00002A90-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char1",
+ .parent = &services[0],
+ .value = &uds.last_name
+ }, {
+ .uuid = "00002A87-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char2",
+ .parent = &services[0],
+ .value = &uds.email
+ }, {
+ .uuid = "00002AA2-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char3",
+ .parent = &services[0],
+ .value = &uds.language
+ }
+};
+
+static struct item descriptors[8] =
+{
+ {
+ .uuid = "00002901-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char0/desc0",
+ .parent = &characteristics[0],
+ .value = &uds_descs.first_name
+ }, {
+ .uuid = "00002904-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char0/desc1",
+ .parent = &characteristics[0],
+ .value = &woutf8
+ }, {
+ .uuid = "00002901-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char1/desc0",
+ .parent = &characteristics[1],
+ .value = &uds_descs.last_name
+ }, {
+ .uuid = "00002904-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char1/desc1",
+ .parent = &characteristics[1],
+ .value = &woutf8
+ }, {
+ .uuid = "00002901-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char2/desc0",
+ .parent = &characteristics[2],
+ .value = &uds_descs.email
+ }, {
+ .uuid = "00002904-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char2/desc1",
+ .parent = &characteristics[2],
+ .value = &woutf8
+ }, {
+ .uuid = "00002901-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char3/desc0",
+ .parent = &characteristics[3],
+ .value = &uds_descs.language
+ }, {
+ .uuid = "00002904-0000-1000-8000-00805f9b34fb",
+ .path = ROOT"/service0/char3/desc1",
+ .parent = &characteristics[3],
+ .value = &woutf8
+ }
+};
+
+/****** utility ***********/
+
+static uint16_t get_offset(sd_bus_message *m)
+{
+ uint16_t offset;
+ const char *key;
+
+ if (0 < sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) {
+ while (sd_bus_message_read_basic(m, 's', &key) > 0) {
+ if (strcmp(key,"offset"))
+ sd_bus_message_skip(m, "v");
+ else {
+ if (sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, "q")) {
+ sd_bus_message_read_basic(m, 'q', &offset);
+ sd_bus_message_exit_container(m);
+ return offset;
+ }
+ }
+ }
+ sd_bus_message_exit_container(m);
+ }
+ return 0;
+}
+
+static int message_append_strings(sd_bus_message *m, const char **s)
+{
+ int rc = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, "s");
+ while (rc >= 0 && *s)
+ rc = sd_bus_message_append_basic(m, 's', *s++);
+ if (rc >= 0)
+ rc = sd_bus_message_close_container(m);
+ return rc;
+}
+
+/****** common callbacks ***********/
+
+static int get_uuid(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ struct item *item = userdata;
+ return sd_bus_message_append_basic(reply, 's', item->uuid);
+}
+
+static int get_parent(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ struct item *item = userdata;
+ return sd_bus_message_append_basic(reply, 'o', item->parent->path);
+}
+
+static int get_children(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ size_t i, n;
+ int rc;
+
+ rc = sd_bus_message_open_container(reply, SD_BUS_TYPE_ARRAY, "o");
+ n = sizeof characteristics / sizeof *characteristics;
+ i = 0;
+ while (rc >= 0 && i < n) {
+ if (characteristics[i].parent == userdata)
+ rc = sd_bus_message_append_basic(reply, 'o', characteristics[i].path);
+ i++;
+ }
+ n = sizeof descriptors / sizeof *descriptors;
+ i = 0;
+ while (rc >= 0 && i < n) {
+ if (descriptors[i].parent == userdata)
+ rc = sd_bus_message_append_basic(reply, 'o', descriptors[i].path);
+ i++;
+ }
+ if (rc >= 0)
+ rc = sd_bus_message_close_container(reply);
+ return rc;
+}
+
+static int read_value_offset(
+ struct item *item,
+ size_t offset,
+ sd_bus_message *reply)
+{
+ struct aia_uds_value *value = item->value;
+ const char *data = value ? value->data : NULL;
+ size_t size = !value ? 0 : value->length ? value->length : data ? strlen(data) : 0;
+ return sd_bus_message_append_array(reply, 'y', &data[offset], offset > size ? 0 : size - offset);
+}
+
+static int read_value(
+ sd_bus_message *m,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ int rc;
+ sd_bus_message *r;
+
+ rc = sd_bus_message_new_method_return(m, &r);
+ rc = read_value_offset(userdata, get_offset(m), r);
+ rc = sd_bus_send(NULL, r, NULL);
+ return 1;
+}
+
+static int write_value_offset(
+ struct item *item,
+ size_t offset,
+ const char *buffer,
+ size_t length)
+{
+ struct aia_uds_value *value = item->value;
+ const char *data = value ? value->data : NULL;
+ size_t size = !value ? 0 : value->length ? value->length : data ? strlen(data) : 0;
+
+
+ char *next = malloc(offset + length + 1);
+ if (!next)
+ return -ENOMEM;
+ if (offset) {
+ if (size >= offset)
+ memcpy(next, data, offset);
+ else {
+ memcpy(next, data, size);
+ memset(&next[size], 0, offset - size);
+ }
+ }
+ memcpy(&next[offset], buffer, length);
+ next[offset + length] = 0;
+ value->data = next;
+ value->length = offset + length;
+ free((char*)data);
+
+ return 0;
+}
+
+static int write_value(
+ sd_bus_message *m,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ int rc;
+ struct item *item = userdata;
+ const void *data;
+ size_t size;
+ sd_bus_message *r;
+
+ rc = sd_bus_message_read_array(m, 'y', &data, &size);
+ rc = write_value_offset(item, get_offset(m), data, size);
+
+ rc = sd_bus_message_new_method_return(m, &r);
+ rc = sd_bus_send(NULL, r, NULL);
+
+ sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), item->path, ITF_CHARACTERISTIC, "Value", NULL);
+
+ if (on_change_callback) {
+ item->value->changed = 1;
+ on_change_callback(&uds);
+ item->value->changed = 0;
+ }
+
+ return 1;
+}
+
+static int get_value(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ return read_value_offset(userdata, 0, reply);
+}
+
+static int get_true(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ int v = 1;
+ return sd_bus_message_append_basic(reply, 'b', &v);
+}
+
+static int get_false(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ int v = 0;
+ return sd_bus_message_append_basic(reply, 'b', &v);
+}
+
+static int not_supported(
+ sd_bus_message *m,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ return sd_bus_reply_method_errorf(m, "org.bluez.Error.NotSupported", "not supported");
+}
+
+static int not_permitted(
+ sd_bus_message *m,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ return sd_bus_reply_method_errorf(m, "org.bluez.Error.NotPermitted", "not permitted");
+}
+
+static int failed(
+ sd_bus_message *m,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ return sd_bus_reply_method_errorf(m, "org.bluez.Error.Failed", "failed");
+}
+
+/****** service's callbacks ***********/
+
+static int get_srv_includes(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ int rc = sd_bus_message_open_container(reply, SD_BUS_TYPE_ARRAY, "o");
+ if (rc >= 0)
+ rc = sd_bus_message_close_container(reply);
+ return rc;
+}
+
+/****** characteristic's callbacks ***********/
+
+static int get_char_flags(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ static const char *flags[] = { "read", "write", NULL };
+ return message_append_strings(reply, flags);
+}
+
+/****** descriptor's callbacks ***********/
+
+static int get_desc_flags(
+ struct sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *ret_error)
+{
+ static const char *flags[] = { "read", NULL };
+ return message_append_strings(reply, flags);
+}
+
+/****** description ***********/
+
+static struct sd_bus_vtable vservice[] = {
+ SD_BUS_VTABLE_START(0),
+
+ SD_BUS_PROPERTY("UUID", "s", get_uuid, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Primary", "b", get_true, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Includes", "ao", get_srv_includes, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Characteristics", "ao", get_children, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+
+ SD_BUS_VTABLE_END
+};
+
+
+static struct sd_bus_vtable vcharacteristic[] = {
+ SD_BUS_VTABLE_START(0),
+
+ SD_BUS_METHOD("ReadValue", "a{sv}", "ay", read_value, 0),
+ SD_BUS_METHOD("WriteValue", "aya{sv}", "", write_value, 0),
+ SD_BUS_METHOD("StartNotify", "", "", not_supported, 0),
+ SD_BUS_METHOD("StopNotify", "", "", failed, 0),
+
+ SD_BUS_PROPERTY("UUID", "s", get_uuid, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Service", "o", get_parent, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Value", "ay", get_value, 0, 0),
+ SD_BUS_PROPERTY("WriteAcquired", "b", get_false, 0, 0),
+ SD_BUS_PROPERTY("NotifyAcquired", "b", get_false, 0, 0),
+ SD_BUS_PROPERTY("Notifying", "b", get_false, 0, 0),
+ SD_BUS_PROPERTY("Flags", "as", get_char_flags, 0, 0),
+ SD_BUS_PROPERTY("Descriptors", "ao", get_children, 0, 0),
+
+ SD_BUS_VTABLE_END
+};
+
+
+static struct sd_bus_vtable vdescriptor[] = {
+ SD_BUS_VTABLE_START(0),
+
+ SD_BUS_METHOD("ReadValue", "a{sv}", "ay", read_value, 0),
+ SD_BUS_METHOD("WriteValue", "aya{sv}", "", not_permitted, 0),
+
+ SD_BUS_PROPERTY("UUID", "s", get_uuid, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Characteristic", "o", get_parent, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Value", "ay", get_value, 0, 0),
+ SD_BUS_PROPERTY("Flags", "as", get_desc_flags, 0, 0),
+
+ SD_BUS_VTABLE_END
+};
+
+
+/******** Integration ***************/
+
+aia_uds_on_change aia_uds_set_on_change(aia_uds_on_change callback)
+{
+ aia_uds_on_change prev = on_change_callback;
+ on_change_callback = callback;
+ return prev;
+}
+
+int aia_uds_init(struct sd_bus *bus)
+{
+ int rc;
+
+ if (busini)
+ return 0;
+
+ rc = sd_bus_add_object_manager(bus, NULL, ROOT);
+
+ rc = sd_bus_add_object_vtable(bus, NULL, services[0].path,
+ ITF_SERVICE, vservice, &services[0]);
+
+ rc = sd_bus_add_object_vtable(bus, NULL, characteristics[0].path,
+ ITF_CHARACTERISTIC, vcharacteristic, &characteristics[0]);
+ rc = sd_bus_add_object_vtable(bus, NULL, characteristics[1].path,
+ ITF_CHARACTERISTIC, vcharacteristic, &characteristics[1]);
+ rc = sd_bus_add_object_vtable(bus, NULL, characteristics[2].path,
+ ITF_CHARACTERISTIC, vcharacteristic, &characteristics[2]);
+ rc = sd_bus_add_object_vtable(bus, NULL, characteristics[3].path,
+ ITF_CHARACTERISTIC, vcharacteristic, &characteristics[3]);
+
+ rc = sd_bus_add_object_vtable(bus, NULL, descriptors[0].path,
+ ITF_DESCRIPTOR, vdescriptor, &descriptors[0]);
+ rc = sd_bus_add_object_vtable(bus, NULL, descriptors[1].path,
+ ITF_DESCRIPTOR, vdescriptor, &descriptors[1]);
+ rc = sd_bus_add_object_vtable(bus, NULL, descriptors[2].path,
+ ITF_DESCRIPTOR, vdescriptor, &descriptors[2]);
+ rc = sd_bus_add_object_vtable(bus, NULL, descriptors[3].path,
+ ITF_DESCRIPTOR, vdescriptor, &descriptors[3]);
+ rc = sd_bus_add_object_vtable(bus, NULL, descriptors[4].path,
+ ITF_DESCRIPTOR, vdescriptor, &descriptors[4]);
+ rc = sd_bus_add_object_vtable(bus, NULL, descriptors[5].path,
+ ITF_DESCRIPTOR, vdescriptor, &descriptors[5]);
+ rc = sd_bus_add_object_vtable(bus, NULL, descriptors[6].path,
+ ITF_DESCRIPTOR, vdescriptor, &descriptors[6]);
+ rc = sd_bus_add_object_vtable(bus, NULL, descriptors[7].path,
+ ITF_DESCRIPTOR, vdescriptor, &descriptors[7]);
+
+ busini = sd_bus_ref(bus);
+ return 0;
+}
+
+struct cb {
+ void *callback;
+ void *closure;
+ int onoff;
+};
+
+static struct cb *alloccb(void *callback, void *closure, int onoff)
+{
+ struct cb *cb = malloc(sizeof *cb);
+ if (cb) {
+ cb->callback = callback;
+ cb->closure = closure;
+ }
+ return cb;
+}
+
+static int register_uds_cb(sd_bus_message *m, void *userdata, sd_bus_error *ret_error)
+{
+ struct cb *cb = userdata;
+ void (*callback)(void *closure, int error, int state);
+ int iserr;
+
+ iserr = sd_bus_message_is_method_error(m, NULL);
+ if (!iserr)
+ activation = cb->onoff;
+ callback = cb->callback;
+ if (callback)
+ callback(cb->closure, iserr, activation);
+ free(cb);
+
+ return 1;
+}
+
+static int register_uds(int onoff, void *data)
+{
+ int rc;
+ sd_bus_message *m;
+
+ rc = sd_bus_message_new_method_call(busini, &m, "org.bluez",
+ "/org/bluez/hci0", "org.bluez.GattManager1",
+ onoff ? "RegisterApplication" : "UnregisterApplication" );
+ rc = sd_bus_message_append_basic(m, 'o', ROOT);
+ if (onoff) {
+ rc = sd_bus_message_open_container(m, 'a', "{sv}");
+ rc = sd_bus_message_close_container(m);
+ }
+ rc = sd_bus_call_async(busini, NULL, m, register_uds_cb, data, 5*1000*1000);
+ sd_bus_message_unref(m);
+ return rc;
+}
+
+int aia_uds_activate(int onoff, void (*callback)(void *closure, int error, int state), void *closure)
+{
+ int rc;
+ struct cb *cb;
+
+ if (!busini)
+ return -EINVAL;
+
+ onoff = !!onoff;
+ if (activation == onoff)
+ return 0;
+
+ cb = alloccb(callback, closure, onoff);
+ if (!cb)
+ return -ENOMEM;
+
+ rc = register_uds(onoff, cb);
+ if (rc < 0)
+ free(cb);
+
+ return rc < 0 ? rc : 1;
+}
+
+int aia_uds_advise(int onoff, void (*callback)(void *closure, int error, int state), void *closure)
+{
+ return aia_uds_activate(onoff, callback, closure);
+}
+