Return-Path: From: Ravi kumar Veeramally To: linux-bluetooth@vger.kernel.org Cc: Ravi kumar Veeramally Subject: [PATCH] android: Add initial MCAP common code Date: Wed, 26 Mar 2014 16:53:46 +0200 Message-Id: <1395845626-11911-1-git-send-email-ravikumar.veeramally@linux.intel.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: The patch keeps all MCAP specific logic in mcap-lib until it receives proper unit tests and then eventually will be used by health profile code as well. --- android/Android.mk | 3 +- android/Makefile.am | 3 +- android/mcap-lib.c | 3161 +++++++++++++++++++++++++++++++++++++++++++++++++++ android/mcap-lib.h | 439 +++++++ 4 files changed, 3604 insertions(+), 2 deletions(-) create mode 100644 android/mcap-lib.c create mode 100644 android/mcap-lib.h diff --git a/android/Android.mk b/android/Android.mk index 0e0932d..a2083a7 100644 --- a/android/Android.mk +++ b/android/Android.mk @@ -66,7 +66,8 @@ LOCAL_SRC_FILES := \ bluez/profiles/network/bnep.c \ bluez/attrib/gattrib.c \ bluez/attrib/gatt.c \ - bluez/attrib/att.c + bluez/attrib/att.c \ + bluez/android/mcap-lib.c LOCAL_C_INCLUDES := \ $(call include-path-for, glib) \ diff --git a/android/Makefile.am b/android/Makefile.am index 58ee3c9..3268034 100644 --- a/android/Makefile.am +++ b/android/Makefile.am @@ -48,7 +48,8 @@ android_bluetoothd_SOURCES = android/main.c \ attrib/gattrib.c attrib/gattrib.h \ btio/btio.h btio/btio.c \ src/sdp-client.h src/sdp-client.c \ - profiles/network/bnep.h profiles/network/bnep.c + profiles/network/bnep.h profiles/network/bnep.c \ + android/mcap-lib.h android/mcap-lib.c android_bluetoothd_LDADD = lib/libbluetooth-internal.la @GLIB_LIBS@ diff --git a/android/mcap-lib.c b/android/mcap-lib.c new file mode 100644 index 0000000..c7e212f --- /dev/null +++ b/android/mcap-lib.c @@ -0,0 +1,3161 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2014 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include +#include +#include +#include + +#include + +#include "lib/bluetooth.h" +#include "bluetooth/l2cap.h" +#include "btio/btio.h" +#include "src/log.h" +#include "src/error.h" + +#include "mcap-lib.h" + +#define MCAP_BTCLOCK_HALF (MCAP_BTCLOCK_FIELD / 2) +#define CLK CLOCK_MONOTONIC + +#define MCAP_CSP_ERROR g_quark_from_static_string("mcap-csp-error-quark") +#define MAX_RETRIES 10 +#define SAMPLE_COUNT 20 + +#define RESPONSE_TIMER 6 /* seconds */ +#define MAX_CACHED 10 /* 10 devices */ + +#define MCAP_ERROR g_quark_from_static_string("mcap-error-quark") + +#define RELEASE_TIMER(__mcl) do { \ + if (__mcl->tid) { \ + g_source_remove(__mcl->tid); \ + __mcl->tid = 0; \ + } \ +} while(0) + +struct mcap_csp { + uint64_t base_tmstamp; /* CSP base timestamp */ + struct timespec base_time; /* CSP base time when timestamp set */ + guint local_caps; /* CSP-Master: have got remote caps */ + guint remote_caps; /* CSP-Slave: remote master got caps */ + guint rem_req_acc; /* CSP-Slave: accuracy required by master */ + guint ind_expected; /* CSP-Master: indication expected */ + uint8_t csp_req; /* CSP-Master: Request control flag */ + guint ind_timer; /* CSP-Slave: indication timer */ + guint set_timer; /* CSP-Slave: delayed set timer */ + void *set_data; /* CSP-Slave: delayed set data */ + void *csp_priv_data; /* CSP-Master: In-flight request data */ +}; + +struct mcap_sync_cap_cbdata { + mcap_sync_cap_cb cb; + gpointer user_data; +}; + +struct mcap_sync_set_cbdata { + mcap_sync_set_cb cb; + gpointer user_data; +}; + +struct csp_caps { + int ts_acc; /* timestamp accuracy */ + int ts_res; /* timestamp resolution */ + int latency; /* Read BT clock latency */ + int preempt_thresh; /* Preemption threshold for latency */ + int syncleadtime_ms; /* SyncLeadTime in ms */ +}; + +struct sync_set_data { + uint8_t update; + uint32_t sched_btclock; + uint64_t timestamp; + int ind_freq; + gboolean role; +}; + +struct connect_mcl { + struct mcap_mcl *mcl; /* MCL for this operation */ + mcap_mcl_connect_cb connect_cb; /* Connect callback */ + GDestroyNotify destroy; /* Destroy callback */ + gpointer user_data; /* Callback user data */ +}; + +typedef union { + mcap_mdl_operation_cb op; + mcap_mdl_operation_conf_cb op_conf; + mcap_mdl_notify_cb notify; +} mcap_cb_type; + +struct mcap_mdl_op_cb { + struct mcap_mdl *mdl; /* MDL for this operation */ + mcap_cb_type cb; /* Operation callback */ + GDestroyNotify destroy; /* Destroy callback */ + gpointer user_data; /* Callback user data */ +}; + +/* MCAP finite state machine functions */ +static void proc_req_connected(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t l); +static void proc_req_pending(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t l); +static void proc_req_active(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t l); + +static void (*proc_req[])(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) = { + proc_req_connected, + proc_req_pending, + proc_req_active +}; + +static gboolean csp_caps_initialized = FALSE; +struct csp_caps _caps; + +static void mcap_cache_mcl(struct mcap_mcl *mcl); + +static void default_mdl_connected_cb(struct mcap_mdl *mdl, gpointer data) +{ + DBG("MCAP Unmanaged mdl connection"); +} + +static void default_mdl_closed_cb(struct mcap_mdl *mdl, gpointer data) +{ + DBG("MCAP Unmanaged mdl closed"); +} + +static void default_mdl_deleted_cb(struct mcap_mdl *mdl, gpointer data) +{ + DBG("MCAP Unmanaged mdl deleted"); +} + +static void default_mdl_aborted_cb(struct mcap_mdl *mdl, gpointer data) +{ + DBG("MCAP Unmanaged mdl aborted"); +} + +static uint8_t default_mdl_conn_req_cb(struct mcap_mcl *mcl, + uint8_t mdepid, uint16_t mdlid, + uint8_t *conf, gpointer data) +{ + DBG("MCAP mdl remote connection aborted"); + /* Due to this callback isn't managed this request won't be supported */ + return MCAP_REQUEST_NOT_SUPPORTED; +} + +static uint8_t default_mdl_reconn_req_cb(struct mcap_mdl *mdl, + gpointer data) +{ + DBG("MCAP mdl remote reconnection aborted"); + /* Due to this callback isn't managed this request won't be supported */ + return MCAP_REQUEST_NOT_SUPPORTED; +} + +static void set_default_cb(struct mcap_mcl *mcl) +{ + if (!mcl->cb) + mcl->cb = g_new0(struct mcap_mdl_cb, 1); + + mcl->cb->mdl_connected = default_mdl_connected_cb; + mcl->cb->mdl_closed = default_mdl_closed_cb; + mcl->cb->mdl_deleted = default_mdl_deleted_cb; + mcl->cb->mdl_aborted = default_mdl_aborted_cb; + mcl->cb->mdl_conn_req = default_mdl_conn_req_cb; + mcl->cb->mdl_reconn_req = default_mdl_reconn_req_cb; +} + +static char *error2str(uint8_t rc) +{ + switch (rc) { + case MCAP_SUCCESS: + return "Success"; + case MCAP_INVALID_OP_CODE: + return "Invalid Op Code"; + case MCAP_INVALID_PARAM_VALUE: + return "Invalid Parameter Value"; + case MCAP_INVALID_MDEP: + return "Invalid MDEP"; + case MCAP_MDEP_BUSY: + return "MDEP Busy"; + case MCAP_INVALID_MDL: + return "Invalid MDL"; + case MCAP_MDL_BUSY: + return "MDL Busy"; + case MCAP_INVALID_OPERATION: + return "Invalid Operation"; + case MCAP_RESOURCE_UNAVAILABLE: + return "Resource Unavailable"; + case MCAP_UNSPECIFIED_ERROR: + return "Unspecified Error"; + case MCAP_REQUEST_NOT_SUPPORTED: + return "Request Not Supported"; + case MCAP_CONFIGURATION_REJECTED: + return "Configuration Rejected"; + default: + return "Unknown Response Code"; + } +} + +static gboolean mcap_send_std_opcode(struct mcap_mcl *mcl, void *cmd, + uint32_t size, GError **err) +{ + if (mcl->state == MCL_IDLE) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_FAILED, + "MCL is not connected"); + return FALSE; + } + + if (mcl->req != MCL_AVAILABLE) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_RESOURCE_UNAVAILABLE, + "Pending request"); + return FALSE; + } + + if (!(mcl->ctrl & MCAP_CTRL_STD_OP)) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_REQUEST_NOT_SUPPORTED, + "Remote does not support standard opcodes"); + return FALSE; + } + + if (mcl->state == MCL_PENDING) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_INVALID_OPERATION, + "Not Std Op. Codes can be sent in PENDING State"); + return FALSE; + } + + if (mcap_send_data(g_io_channel_unix_get_fd(mcl->cc), cmd, size) < 0) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_FAILED, + "Command can't be sent, write error"); + return FALSE; + } + + mcl->lcmd = cmd; + mcl->req = MCL_WAITING_RSP; + + return TRUE; +} + +static void update_mcl_state(struct mcap_mcl *mcl) +{ + GSList *l; + struct mcap_mdl *mdl; + + if (mcl->state == MCL_PENDING) + return; + + for (l = mcl->mdls; l; l = l->next) { + mdl = l->data; + + if (mdl->state == MDL_CONNECTED) { + mcl->state = MCL_ACTIVE; + return; + } + } + + mcl->state = MCL_CONNECTED; +} + +static void shutdown_mdl(struct mcap_mdl *mdl) +{ + mdl->state = MDL_CLOSED; + + if (mdl->wid) { + g_source_remove(mdl->wid); + mdl->wid = 0; + } + + if (mdl->dc) { + g_io_channel_shutdown(mdl->dc, TRUE, NULL); + g_io_channel_unref(mdl->dc); + mdl->dc = NULL; + } +} + +static void free_mdl(struct mcap_mdl *mdl) +{ + if (!mdl) + return; + + mcap_mcl_unref(mdl->mcl); + g_free(mdl); +} + +static int cmp_mdl_state(gconstpointer a, gconstpointer b) +{ + const struct mcap_mdl *mdl = a; + const MDLState *st = b; + + if (mdl->state == *st) + return 0; + else if (mdl->state < *st) + return -1; + else + return 1; +} + +static void free_mcap_mdl_op(struct mcap_mdl_op_cb *op) +{ + if (op->destroy) + op->destroy(op->user_data); + + if (op->mdl) + mcap_mdl_unref(op->mdl); + + g_free(op); +} + +static void free_mcl_priv_data(struct mcap_mcl *mcl) +{ + free_mcap_mdl_op(mcl->priv_data); + mcl->priv_data = NULL; +} + +static void mcap_notify_error(struct mcap_mcl *mcl, GError *err) +{ + struct mcap_mdl_op_cb *con = mcl->priv_data; + struct mcap_mdl *mdl; + MDLState st; + GSList *l; + + if (!con || !mcl->lcmd) + return; + + switch (mcl->lcmd[0]) { + case MCAP_MD_CREATE_MDL_REQ: + st = MDL_WAITING; + l = g_slist_find_custom(mcl->mdls, &st, cmp_mdl_state); + mdl = l->data; + mcl->mdls = g_slist_remove(mcl->mdls, mdl); + mcap_mdl_unref(mdl); + update_mcl_state(mcl); + con->cb.op_conf(NULL, 0, err, con->user_data); + break; + case MCAP_MD_ABORT_MDL_REQ: + st = MDL_WAITING; + l = g_slist_find_custom(mcl->mdls, &st, cmp_mdl_state); + shutdown_mdl(l->data); + update_mcl_state(mcl); + con->cb.notify(err, con->user_data); + break; + case MCAP_MD_DELETE_MDL_REQ: + for (l = mcl->mdls; l; l = l->next) { + mdl = l->data; + if (mdl->state == MDL_DELETING) + mdl->state = (mdl->dc) ? MDL_CONNECTED : + MDL_CLOSED; + } + update_mcl_state(mcl); + con->cb.notify(err, con->user_data); + break; + case MCAP_MD_RECONNECT_MDL_REQ: + st = MDL_WAITING; + l = g_slist_find_custom(mcl->mdls, &st, cmp_mdl_state); + shutdown_mdl(l->data); + update_mcl_state(mcl); + con->cb.op(NULL, err, con->user_data); + break; + } + + free_mcl_priv_data(mcl); + g_free(mcl->lcmd); + mcl->lcmd = NULL; +} + +int mcap_send_data(int sock, const void *buf, uint32_t size) +{ + const uint8_t *buf_b = buf; + uint32_t sent = 0; + + while (sent < size) { + int n = write(sock, buf_b + sent, size - sent); + if (n < 0) + return -1; + sent += n; + } + + return 0; +} + +static int mcap_send_cmd(struct mcap_mcl *mcl, uint8_t oc, uint8_t rc, + uint16_t mdl, uint8_t *data, size_t len) +{ + mcap_rsp *cmd; + int sock, sent; + + if (mcl->cc == NULL) + return -1; + + sock = g_io_channel_unix_get_fd(mcl->cc); + + cmd = g_malloc(sizeof(mcap_rsp) + len); + cmd->op = oc; + cmd->rc = rc; + cmd->mdl = htons(mdl); + + if (data && len > 0) + memcpy(cmd->data, data, len); + + sent = mcap_send_data(sock, cmd, sizeof(mcap_rsp) + len); + g_free(cmd); + + return sent; +} + +static struct mcap_mdl *get_mdl(struct mcap_mcl *mcl, uint16_t mdlid) +{ + GSList *l; + struct mcap_mdl *mdl; + + for (l = mcl->mdls; l; l = l->next) { + mdl = l->data; + if (mdlid == mdl->mdlid) + return mdl; + } + + return NULL; +} + +static uint16_t generate_mdlid(struct mcap_mcl *mcl) +{ + uint16_t mdlid = mcl->next_mdl; + struct mcap_mdl *mdl; + + do { + mdl = get_mdl(mcl, mdlid); + if (!mdl) { + mcl->next_mdl = (mdlid % MCAP_MDLID_FINAL) + 1; + return mdlid; + } else + mdlid = (mdlid % MCAP_MDLID_FINAL) + 1; + } while (mdlid != mcl->next_mdl); + + /* No more mdlids availables */ + return 0; +} + +static mcap_md_req *create_req(uint8_t op, uint16_t mdl_id) +{ + mcap_md_req *req_cmd; + + req_cmd = g_new0(mcap_md_req, 1); + + req_cmd->op = op; + req_cmd->mdl = htons(mdl_id); + + return req_cmd; +} + +static mcap_md_create_mdl_req *create_mdl_req(uint16_t mdl_id, uint8_t mdep, + uint8_t conf) +{ + mcap_md_create_mdl_req *req_mdl; + + req_mdl = g_new0(mcap_md_create_mdl_req, 1); + + req_mdl->op = MCAP_MD_CREATE_MDL_REQ; + req_mdl->mdl = htons(mdl_id); + req_mdl->mdep = mdep; + req_mdl->conf = conf; + + return req_mdl; +} + +static int compare_mdl(gconstpointer a, gconstpointer b) +{ + const struct mcap_mdl *mdla = a; + const struct mcap_mdl *mdlb = b; + + if (mdla->mdlid == mdlb->mdlid) + return 0; + else if (mdla->mdlid < mdlb->mdlid) + return -1; + else + return 1; +} + +static gboolean wait_response_timer(gpointer data) +{ + struct mcap_mcl *mcl = data; + + GError *gerr = NULL; + + RELEASE_TIMER(mcl); + + g_set_error(&gerr, MCAP_ERROR, MCAP_ERROR_FAILED, + "Timeout waiting response"); + + mcap_notify_error(mcl, gerr); + + g_error_free(gerr); + mcl->mi->mcl_disconnected_cb(mcl, mcl->mi->user_data); + mcap_cache_mcl(mcl); + + return FALSE; +} + +gboolean mcap_create_mdl(struct mcap_mcl *mcl, + uint8_t mdepid, + uint8_t conf, + mcap_mdl_operation_conf_cb connect_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err) +{ + struct mcap_mdl *mdl; + struct mcap_mdl_op_cb *con; + mcap_md_create_mdl_req *cmd; + uint16_t id; + + id = generate_mdlid(mcl); + if (!id) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_FAILED, + "Not more mdlids available"); + return FALSE; + } + + mdl = g_new0(struct mcap_mdl, 1); + mdl->mcl = mcap_mcl_ref(mcl); + mdl->mdlid = id; + mdl->mdep_id = mdepid; + mdl->state = MDL_WAITING; + + con = g_new0(struct mcap_mdl_op_cb, 1); + con->mdl = mcap_mdl_ref(mdl); + con->cb.op_conf = connect_cb; + con->destroy = destroy; + con->user_data = user_data; + + cmd = create_mdl_req(id, mdepid, conf); + if (!mcap_send_std_opcode(mcl, cmd, sizeof(mcap_md_create_mdl_req), + err)) { + mcap_mdl_unref(con->mdl); + g_free(con); + g_free(cmd); + return FALSE; + } + + mcl->state = MCL_ACTIVE; + mcl->priv_data = con; + + mcl->mdls = g_slist_insert_sorted(mcl->mdls, mcap_mdl_ref(mdl), + compare_mdl); + mcl->tid = g_timeout_add_seconds(RESPONSE_TIMER, wait_response_timer, + mcl); + return TRUE; +} + +gboolean mcap_reconnect_mdl(struct mcap_mdl *mdl, + mcap_mdl_operation_cb reconnect_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err) +{ + struct mcap_mdl_op_cb *con; + struct mcap_mcl *mcl = mdl->mcl; + mcap_md_req *cmd; + + if (mdl->state != MDL_CLOSED) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_FAILED, + "MDL is not closed"); + return FALSE; + } + + cmd = create_req(MCAP_MD_RECONNECT_MDL_REQ, mdl->mdlid); + if (!mcap_send_std_opcode(mcl, cmd, sizeof(mcap_md_req), err)) { + g_free(cmd); + return FALSE; + } + + mdl->state = MDL_WAITING; + + con = g_new0(struct mcap_mdl_op_cb, 1); + con->mdl = mcap_mdl_ref(mdl); + con->cb.op = reconnect_cb; + con->destroy = destroy; + con->user_data = user_data; + + mcl->state = MCL_ACTIVE; + mcl->priv_data = con; + + mcl->tid = g_timeout_add_seconds(RESPONSE_TIMER, wait_response_timer, + mcl); + return TRUE; +} + +static gboolean send_delete_req(struct mcap_mcl *mcl, + struct mcap_mdl_op_cb *con, + uint16_t mdlid, + GError **err) +{ + mcap_md_req *cmd; + + cmd = create_req(MCAP_MD_DELETE_MDL_REQ, mdlid); + if (!mcap_send_std_opcode(mcl, cmd, sizeof(mcap_md_req), err)) { + g_free(cmd); + return FALSE; + } + + mcl->priv_data = con; + + mcl->tid = g_timeout_add_seconds(RESPONSE_TIMER, wait_response_timer, + mcl); + return TRUE; +} + +gboolean mcap_delete_all_mdls(struct mcap_mcl *mcl, + mcap_mdl_notify_cb delete_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err) +{ + GSList *l; + struct mcap_mdl *mdl; + struct mcap_mdl_op_cb *con; + + DBG("MCL in state: %d", mcl->state); + if (!mcl->mdls) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_FAILED, + "There are not MDLs created"); + return FALSE; + } + + for (l = mcl->mdls; l; l = l->next) { + mdl = l->data; + if (mdl->state != MDL_WAITING) + mdl->state = MDL_DELETING; + } + + con = g_new0(struct mcap_mdl_op_cb, 1); + con->mdl = NULL; + con->cb.notify = delete_cb; + con->destroy = destroy; + con->user_data = user_data; + + + if (!send_delete_req(mcl, con, MCAP_ALL_MDLIDS, err)) { + g_free(con); + return FALSE; + } + + return TRUE; +} + +gboolean mcap_delete_mdl(struct mcap_mdl *mdl, mcap_mdl_notify_cb delete_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err) +{ + struct mcap_mcl *mcl= mdl->mcl; + struct mcap_mdl_op_cb *con; + GSList *l; + + l = g_slist_find(mcl->mdls, mdl); + + if (!l) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_INVALID_MDL, + "%s" , error2str(MCAP_INVALID_MDEP)); + return FALSE; + } + + if (mdl->state == MDL_WAITING) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_FAILED, + "Mdl is not created"); + return FALSE; + } + + mdl->state = MDL_DELETING; + + con = g_new0(struct mcap_mdl_op_cb, 1); + con->mdl = mcap_mdl_ref(mdl); + con->cb.notify = delete_cb; + con->destroy = destroy; + con->user_data = user_data; + + if (!send_delete_req(mcl, con, mdl->mdlid, err)) { + mcap_mdl_unref(con->mdl); + g_free(con); + return FALSE; + } + + return TRUE; +} + +gboolean mcap_mdl_abort(struct mcap_mdl *mdl, mcap_mdl_notify_cb abort_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err) +{ + struct mcap_mdl_op_cb *con; + struct mcap_mcl *mcl = mdl->mcl; + mcap_md_req *cmd; + + if (mdl->state != MDL_WAITING) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_FAILED, + "Mdl in invalid state"); + return FALSE; + } + + cmd = create_req(MCAP_MD_ABORT_MDL_REQ, mdl->mdlid); + if (!mcap_send_std_opcode(mcl, cmd, sizeof(mcap_md_req), err)) { + g_free(cmd); + return FALSE; + } + + con = g_new0(struct mcap_mdl_op_cb, 1); + con->mdl = mcap_mdl_ref(mdl); + con->cb.notify = abort_cb; + con->destroy = destroy; + con->user_data = user_data; + + mcl->priv_data = con; + mcl->tid = g_timeout_add_seconds(RESPONSE_TIMER, wait_response_timer, + mcl); + return TRUE; +} + +static struct mcap_mcl *find_mcl(GSList *list, const bdaddr_t *addr) +{ + struct mcap_mcl *mcl; + + for (; list; list = list->next) { + mcl = list->data; + + if (!bacmp(&mcl->addr, addr)) + return mcl; + } + + return NULL; +} + +int mcap_mdl_get_fd(struct mcap_mdl *mdl) +{ + if (!mdl || mdl->state != MDL_CONNECTED) + return -ENOTCONN; + + return g_io_channel_unix_get_fd(mdl->dc); +} + +uint16_t mcap_mdl_get_mdlid(struct mcap_mdl *mdl) +{ + if (!mdl) + return MCAP_MDLID_RESERVED; + + return mdl->mdlid; +} + +static void close_mcl(struct mcap_mcl *mcl, gboolean cache_requested) +{ + gboolean save = ((!(mcl->ctrl & MCAP_CTRL_FREE)) && cache_requested); + + RELEASE_TIMER(mcl); + + if (mcl->cc) { + g_io_channel_shutdown(mcl->cc, TRUE, NULL); + g_io_channel_unref(mcl->cc); + mcl->cc = NULL; + } + + if (mcl->wid) { + g_source_remove(mcl->wid); + mcl->wid = 0; + } + + if (mcl->lcmd) { + g_free(mcl->lcmd); + mcl->lcmd = NULL; + } + + if (mcl->priv_data) + free_mcl_priv_data(mcl); + + g_slist_foreach(mcl->mdls, (GFunc) shutdown_mdl, NULL); + + mcap_sync_stop(mcl); + + mcl->state = MCL_IDLE; + + if (save) + return; + + g_slist_foreach(mcl->mdls, (GFunc) mcap_mdl_unref, NULL); + g_slist_free(mcl->mdls); + mcl->mdls = NULL; +} + +static void mcap_mcl_shutdown(struct mcap_mcl *mcl) +{ + close_mcl(mcl, TRUE); +} + +static void mcap_mcl_release(struct mcap_mcl *mcl) +{ + close_mcl(mcl, FALSE); +} + +static void mcap_cache_mcl(struct mcap_mcl *mcl) +{ + GSList *l; + struct mcap_mcl *last; + int len; + + if (mcl->ctrl & MCAP_CTRL_CACHED) + return; + + mcl->mi->mcls = g_slist_remove(mcl->mi->mcls, mcl); + + if (mcl->ctrl & MCAP_CTRL_NOCACHE) { + mcl->mi->cached = g_slist_remove(mcl->mi->cached, mcl); + mcap_mcl_release(mcl); + mcap_mcl_unref(mcl); + return; + } + + DBG("Caching MCL"); + + len = g_slist_length(mcl->mi->cached); + if (len == MAX_CACHED) { + /* Remove the latest cached mcl */ + l = g_slist_last(mcl->mi->cached); + last = l->data; + mcl->mi->cached = g_slist_remove(mcl->mi->cached, last); + last->ctrl &= ~MCAP_CTRL_CACHED; + if (last->ctrl & MCAP_CTRL_CONN) { + /* We have to release this MCL if */ + /* connection is not successful */ + last->ctrl |= MCAP_CTRL_FREE; + } else { + mcap_mcl_release(last); + last->mi->mcl_uncached_cb(last, last->mi->user_data); + } + mcap_mcl_unref(last); + } + + mcl->mi->cached = g_slist_prepend(mcl->mi->cached, mcl); + mcl->ctrl |= MCAP_CTRL_CACHED; + mcap_mcl_shutdown(mcl); +} + +static void mcap_uncache_mcl(struct mcap_mcl *mcl) +{ + if (!(mcl->ctrl & MCAP_CTRL_CACHED)) + return; + + DBG("Got MCL from cache"); + + mcl->mi->cached = g_slist_remove(mcl->mi->cached, mcl); + mcl->mi->mcls = g_slist_prepend(mcl->mi->mcls, mcl); + mcl->ctrl &= ~MCAP_CTRL_CACHED; + mcl->ctrl &= ~MCAP_CTRL_FREE; +} + +void mcap_close_mcl(struct mcap_mcl *mcl, gboolean cache) +{ + if (!mcl) + return; + + if (mcl->ctrl & MCAP_CTRL_FREE) { + mcap_mcl_release(mcl); + return; + } + + if (!cache) + mcl->ctrl |= MCAP_CTRL_NOCACHE; + + if (mcl->cc) { + g_io_channel_shutdown(mcl->cc, TRUE, NULL); + g_io_channel_unref(mcl->cc); + mcl->cc = NULL; + mcl->state = MCL_IDLE; + } else if ((mcl->ctrl & MCAP_CTRL_CACHED) && + (mcl->ctrl & MCAP_CTRL_NOCACHE)) { + mcl->ctrl &= ~MCAP_CTRL_CACHED; + mcl->mi->cached = g_slist_remove(mcl->mi->cached, mcl); + mcap_mcl_release(mcl); + mcap_mcl_unref(mcl); + } +} + +struct mcap_mcl *mcap_mcl_ref(struct mcap_mcl *mcl) +{ + mcl->ref++; + + DBG("mcap_mcl_ref(%p): ref=%d", mcl, mcl->ref); + + return mcl; +} + +void mcap_mcl_unref(struct mcap_mcl *mcl) +{ + mcl->ref--; + + DBG("mcap_mcl_unref(%p): ref=%d", mcl, mcl->ref); + + if (mcl->ref > 0) + return; + + mcap_mcl_release(mcl); + mcap_instance_unref(mcl->mi); + g_free(mcl->cb); + g_free(mcl); +} + +static gboolean parse_set_opts(struct mcap_mdl_cb *mdl_cb, GError **err, + McapMclCb cb1, va_list args) +{ + McapMclCb cb = cb1; + struct mcap_mdl_cb *c; + + c = g_new0(struct mcap_mdl_cb, 1); + + while (cb != MCAP_MDL_CB_INVALID) { + switch (cb) { + case MCAP_MDL_CB_CONNECTED: + c->mdl_connected = va_arg(args, mcap_mdl_event_cb); + break; + case MCAP_MDL_CB_CLOSED: + c->mdl_closed = va_arg(args, mcap_mdl_event_cb); + break; + case MCAP_MDL_CB_DELETED: + c->mdl_deleted = va_arg(args, mcap_mdl_event_cb); + break; + case MCAP_MDL_CB_ABORTED: + c->mdl_aborted = va_arg(args, mcap_mdl_event_cb); + break; + case MCAP_MDL_CB_REMOTE_CONN_REQ: + c->mdl_conn_req = va_arg(args, + mcap_remote_mdl_conn_req_cb); + break; + case MCAP_MDL_CB_REMOTE_RECONN_REQ: + c->mdl_reconn_req = va_arg(args, + mcap_remote_mdl_reconn_req_cb); + break; + default: + g_set_error(err, MCAP_ERROR, MCAP_ERROR_INVALID_ARGS, + "Unknown option %d", cb); + g_free(c); + return FALSE; + } + cb = va_arg(args, int); + } + + /* Set new callbacks */ + if (c->mdl_connected) + mdl_cb->mdl_connected = c->mdl_connected; + if (c->mdl_closed) + mdl_cb->mdl_closed = c->mdl_closed; + if (c->mdl_deleted) + mdl_cb->mdl_deleted = c->mdl_deleted; + if (c->mdl_aborted) + mdl_cb->mdl_aborted = c->mdl_aborted; + if (c->mdl_conn_req) + mdl_cb->mdl_conn_req = c->mdl_conn_req; + if (c->mdl_reconn_req) + mdl_cb->mdl_reconn_req = c->mdl_reconn_req; + + g_free(c); + + return TRUE; +} + +gboolean mcap_mcl_set_cb(struct mcap_mcl *mcl, gpointer user_data, + GError **gerr, McapMclCb cb1, ...) +{ + va_list args; + gboolean ret; + + va_start(args, cb1); + ret = parse_set_opts(mcl->cb, gerr, cb1, args); + va_end(args); + + if (!ret) + return FALSE; + + mcl->cb->user_data = user_data; + return TRUE; +} + +void mcap_mcl_get_addr(struct mcap_mcl *mcl, bdaddr_t *addr) +{ + bacpy(addr, &mcl->addr); +} + +static void mcap_del_mdl(gpointer elem, gpointer user_data) +{ + struct mcap_mdl *mdl = elem; + gboolean notify = *(gboolean *) user_data; + + shutdown_mdl(mdl); + if (notify) + mdl->mcl->cb->mdl_deleted(mdl, mdl->mcl->cb->user_data); + + mcap_mdl_unref(mdl); +} + +static gboolean check_cmd_req_length(struct mcap_mcl *mcl, void *cmd, + uint32_t rlen, uint32_t explen, uint8_t rspcod) +{ + mcap_md_req *req; + uint16_t mdl_id; + + if (rlen != explen) { + if (rlen >= sizeof(mcap_md_req)) { + req = cmd; + mdl_id = ntohs(req->mdl); + } else { + /* We can't get mdlid */ + mdl_id = MCAP_MDLID_RESERVED; + } + mcap_send_cmd(mcl, rspcod, MCAP_INVALID_PARAM_VALUE, mdl_id, + NULL, 0); + return FALSE; + } + return TRUE; +} + +static void process_md_create_mdl_req(struct mcap_mcl *mcl, void *cmd, + uint32_t len) +{ + mcap_md_create_mdl_req *req; + struct mcap_mdl *mdl; + uint16_t mdl_id; + uint8_t mdep_id; + uint8_t cfga, conf; + uint8_t rsp; + + if (!check_cmd_req_length(mcl, cmd, len, sizeof(mcap_md_create_mdl_req), + MCAP_MD_CREATE_MDL_RSP)) + return; + + req = cmd; + mdl_id = ntohs(req->mdl); + if (mdl_id < MCAP_MDLID_INITIAL || mdl_id > MCAP_MDLID_FINAL) { + mcap_send_cmd(mcl, MCAP_MD_CREATE_MDL_RSP, MCAP_INVALID_MDL, + mdl_id, NULL, 0); + return; + } + + mdep_id = req->mdep; + if (mdep_id > MCAP_MDEPID_FINAL) { + mcap_send_cmd(mcl, MCAP_MD_CREATE_MDL_RSP, MCAP_INVALID_MDEP, + mdl_id, NULL, 0); + return; + } + + mdl = get_mdl(mcl, mdl_id); + if (mdl && (mdl->state == MDL_WAITING || mdl->state == MDL_DELETING )) { + /* Creation request arrives for a MDL that is being managed + * at current moment */ + mcap_send_cmd(mcl, MCAP_MD_CREATE_MDL_RSP, MCAP_MDL_BUSY, + mdl_id, NULL, 0); + return; + } + + cfga = conf = req->conf; + /* Callback to upper layer */ + rsp = mcl->cb->mdl_conn_req(mcl, mdep_id, mdl_id, &conf, + mcl->cb->user_data); + if (mcl->state == MCL_IDLE) { + /* MCL has been closed int the callback */ + return; + } + + if (cfga != 0 && cfga != conf) { + /* Remote device set default configuration but upper profile */ + /* has changed it. Protocol Error: force closing the MCL by */ + /* remote device using UNSPECIFIED_ERROR response */ + mcap_send_cmd(mcl, MCAP_MD_CREATE_MDL_RSP, + MCAP_UNSPECIFIED_ERROR, mdl_id, NULL, 0); + return; + } + if (rsp != MCAP_SUCCESS) { + mcap_send_cmd(mcl, MCAP_MD_CREATE_MDL_RSP, rsp, mdl_id, + NULL, 0); + return; + } + + if (!mdl) { + mdl = g_new0(struct mcap_mdl, 1); + mdl->mcl = mcap_mcl_ref(mcl); + mdl->mdlid = mdl_id; + mcl->mdls = g_slist_insert_sorted(mcl->mdls, mcap_mdl_ref(mdl), + compare_mdl); + } else if (mdl->state == MDL_CONNECTED) { + /* MCAP specification says that we should close the MCL if + * it is open when we receive a MD_CREATE_MDL_REQ */ + shutdown_mdl(mdl); + } + + mdl->mdep_id = mdep_id; + mdl->state = MDL_WAITING; + + mcl->state = MCL_PENDING; + mcap_send_cmd(mcl, MCAP_MD_CREATE_MDL_RSP, MCAP_SUCCESS, mdl_id, + &conf, 1); +} + +static void process_md_reconnect_mdl_req(struct mcap_mcl *mcl, void *cmd, + uint32_t len) +{ + mcap_md_req *req; + struct mcap_mdl *mdl; + uint16_t mdl_id; + uint8_t rsp; + + if (!check_cmd_req_length(mcl, cmd, len, sizeof(mcap_md_req), + MCAP_MD_RECONNECT_MDL_RSP)) + return; + + req = cmd; + mdl_id = ntohs(req->mdl); + + mdl = get_mdl(mcl, mdl_id); + if (!mdl) { + mcap_send_cmd(mcl, MCAP_MD_RECONNECT_MDL_RSP, MCAP_INVALID_MDL, + mdl_id, NULL, 0); + return; + } else if (mdl->state == MDL_WAITING || mdl->state == MDL_DELETING ) { + /* Creation request arrives for a MDL that is being managed + * at current moment */ + mcap_send_cmd(mcl, MCAP_MD_RECONNECT_MDL_RSP, MCAP_MDL_BUSY, + mdl_id, NULL, 0); + return; + } + + /* Callback to upper layer */ + rsp = mcl->cb->mdl_reconn_req(mdl, mcl->cb->user_data); + if (mcl->state == MCL_IDLE) + return; + + if (rsp != MCAP_SUCCESS) { + mcap_send_cmd(mcl, MCAP_MD_RECONNECT_MDL_RSP, rsp, mdl_id, + NULL, 0); + return; + } + + if (mdl->state == MDL_CONNECTED) + shutdown_mdl(mdl); + + mdl->state = MDL_WAITING; + mcl->state = MCL_PENDING; + mcap_send_cmd(mcl, MCAP_MD_RECONNECT_MDL_RSP, MCAP_SUCCESS, mdl_id, + NULL, 0); +} + +static void process_md_abort_mdl_req(struct mcap_mcl *mcl, void *cmd, + uint32_t len) +{ + mcap_md_req *req; + GSList *l; + struct mcap_mdl *mdl, *abrt; + uint16_t mdl_id; + + if (!check_cmd_req_length(mcl, cmd, len, sizeof(mcap_md_req), + MCAP_MD_ABORT_MDL_RSP)) + return; + + req = cmd; + mdl_id = ntohs(req->mdl); + mcl->state = MCL_CONNECTED; + abrt = NULL; + for (l = mcl->mdls; l; l = l->next) { + mdl = l->data; + if (mdl_id == mdl->mdlid && mdl->state == MDL_WAITING) { + abrt = mdl; + if (mcl->state != MCL_CONNECTED) + break; + continue; + } + if (mdl->state == MDL_CONNECTED && mcl->state != MCL_ACTIVE) + mcl->state = MCL_ACTIVE; + + if (abrt && mcl->state == MCL_ACTIVE) + break; + } + + if (!abrt) { + mcap_send_cmd(mcl, MCAP_MD_ABORT_MDL_RSP, MCAP_INVALID_MDL, + mdl_id, NULL, 0); + return; + } + + mcl->cb->mdl_aborted(abrt, mcl->cb->user_data); + abrt->state = MDL_CLOSED; + mcap_send_cmd(mcl, MCAP_MD_ABORT_MDL_RSP, MCAP_SUCCESS, mdl_id, + NULL, 0); +} + +static void process_md_delete_mdl_req(struct mcap_mcl *mcl, void *cmd, + uint32_t len) +{ + mcap_md_req *req; + struct mcap_mdl *mdl, *aux; + uint16_t mdlid; + gboolean notify; + GSList *l; + + if (!check_cmd_req_length(mcl, cmd, len, sizeof(mcap_md_req), + MCAP_MD_DELETE_MDL_RSP)) + return; + + req = cmd; + mdlid = ntohs(req->mdl); + if (mdlid == MCAP_ALL_MDLIDS) { + notify = FALSE; + g_slist_foreach(mcl->mdls, mcap_del_mdl, ¬ify); + g_slist_free(mcl->mdls); + mcl->mdls = NULL; + mcl->state = MCL_CONNECTED; + /* NULL mdl means ALL_MDLS */ + mcl->cb->mdl_deleted(NULL, mcl->cb->user_data); + goto resp; + } + + if (mdlid < MCAP_MDLID_INITIAL || mdlid > MCAP_MDLID_FINAL) { + mcap_send_cmd(mcl, MCAP_MD_DELETE_MDL_RSP, MCAP_INVALID_MDL, + mdlid, NULL, 0); + return; + } + + for (l = mcl->mdls, mdl = NULL; l; l = l->next) { + aux = l->data; + if (aux->mdlid == mdlid) { + mdl = aux; + break; + } + } + + if (!mdl || mdl->state == MDL_WAITING) { + mcap_send_cmd(mcl, MCAP_MD_DELETE_MDL_RSP, MCAP_INVALID_MDL, + mdlid, NULL, 0); + return; + } + + mcl->mdls = g_slist_remove(mcl->mdls, mdl); + update_mcl_state(mcl); + notify = TRUE; + mcap_del_mdl(mdl, ¬ify); + +resp: + mcap_send_cmd(mcl, MCAP_MD_DELETE_MDL_RSP, MCAP_SUCCESS, mdlid, + NULL, 0); +} + +static void invalid_req_state(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + uint16_t mdlr; + + error("Invalid cmd received (op code = %d) in state %d", cmd[0], + mcl->state); + /* Get previously mdlid sent to generate an appropriate + * response if it is possible */ + mdlr = len < sizeof(mcap_md_req) ? MCAP_MDLID_RESERVED : + ntohs(((mcap_md_req *) cmd)->mdl); + mcap_send_cmd(mcl, cmd[0]+1, MCAP_INVALID_OPERATION, mdlr, NULL, 0); +} + +/* Function used to process commands depending of MCL state */ +static void proc_req_connected(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + switch (cmd[0]) { + case MCAP_MD_CREATE_MDL_REQ: + process_md_create_mdl_req(mcl, cmd, len); + break; + case MCAP_MD_RECONNECT_MDL_REQ: + process_md_reconnect_mdl_req(mcl, cmd, len); + break; + case MCAP_MD_DELETE_MDL_REQ: + process_md_delete_mdl_req(mcl, cmd, len); + break; + default: + invalid_req_state(mcl, cmd, len); + } +} + +static void proc_req_pending(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + if (cmd[0] == MCAP_MD_ABORT_MDL_REQ) + process_md_abort_mdl_req(mcl, cmd, len); + else + invalid_req_state(mcl, cmd, len); +} + +static void proc_req_active(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + switch (cmd[0]) { + case MCAP_MD_CREATE_MDL_REQ: + process_md_create_mdl_req(mcl, cmd, len); + break; + case MCAP_MD_RECONNECT_MDL_REQ: + process_md_reconnect_mdl_req(mcl, cmd, len); + break; + case MCAP_MD_DELETE_MDL_REQ: + process_md_delete_mdl_req(mcl, cmd, len); + break; + default: + invalid_req_state(mcl, cmd, len); + } +} + +/* Function used to process replies */ +static gboolean check_err_rsp(struct mcap_mcl *mcl, mcap_rsp *rsp, + uint32_t rlen, uint32_t len, GError **gerr) +{ + mcap_md_req *cmdlast = (mcap_md_req *) mcl->lcmd; + int err = MCAP_ERROR_FAILED; + gboolean close = FALSE; + char *msg; + + if (rsp->op == MCAP_ERROR_RSP) { + msg = "MCAP_ERROR_RSP received"; + close = FALSE; + goto fail; + } + + /* Check if the response matches with the last request */ + if (rlen < sizeof(mcap_rsp) || (mcl->lcmd[0] + 1) != rsp->op) { + msg = "Protocol error"; + close = FALSE; + goto fail; + } + + if (rlen < len) { + msg = "Protocol error"; + close = FALSE; + goto fail; + } + + if (rsp->mdl != cmdlast->mdl) { + msg = "MDLID received doesn't match with MDLID sent"; + close = TRUE; + goto fail; + } + + if (rsp->rc == MCAP_REQUEST_NOT_SUPPORTED) { + msg = "Remote does not support opcodes"; + mcl->ctrl &= ~MCAP_CTRL_STD_OP; + goto fail; + } + + if (rsp->rc == MCAP_UNSPECIFIED_ERROR) { + msg = "Unspecified error"; + close = TRUE; + goto fail; + } + + if (rsp->rc != MCAP_SUCCESS) { + msg = error2str(rsp->rc); + err = rsp->rc; + goto fail; + } + + return FALSE; + +fail: + g_set_error(gerr, MCAP_ERROR, err, "%s", msg); + return close; +} + +static gboolean process_md_create_mdl_rsp(struct mcap_mcl *mcl, + mcap_rsp *rsp, uint32_t len) +{ + mcap_md_create_mdl_req *cmdlast = (mcap_md_create_mdl_req *) mcl->lcmd; + struct mcap_mdl_op_cb *conn = mcl->priv_data; + mcap_mdl_operation_conf_cb connect_cb = conn->cb.op_conf; + gpointer user_data = conn->user_data; + struct mcap_mdl *mdl = conn->mdl; + uint8_t conf = cmdlast->conf; + gboolean close; + GError *gerr = NULL; + + close = check_err_rsp(mcl, rsp, len, sizeof(mcap_rsp) + 1, &gerr); + g_free(mcl->lcmd); + mcl->lcmd = NULL; + mcl->req = MCL_AVAILABLE; + + if (gerr) + goto fail; + + /* Check if preferences changed */ + if (conf != 0x00 && rsp->data[0] != conf) { + g_set_error(&gerr, MCAP_ERROR, MCAP_ERROR_FAILED, + "Configuration changed"); + close = TRUE; + goto fail; + } + + connect_cb(mdl, rsp->data[0], gerr, user_data); + return close; + +fail: + connect_cb(NULL, 0, gerr, user_data); + mcl->mdls = g_slist_remove(mcl->mdls, mdl); + mcap_mdl_unref(mdl); + g_error_free(gerr); + update_mcl_state(mcl); + return close; +} + +static gboolean process_md_reconnect_mdl_rsp(struct mcap_mcl *mcl, + mcap_rsp *rsp, uint32_t len) +{ + struct mcap_mdl_op_cb *reconn = mcl->priv_data; + mcap_mdl_operation_cb reconn_cb = reconn->cb.op; + gpointer user_data = reconn->user_data; + struct mcap_mdl *mdl = reconn->mdl; + GError *gerr = NULL; + gboolean close; + + close = check_err_rsp(mcl, rsp, len, sizeof(mcap_rsp), &gerr); + + g_free(mcl->lcmd); + mcl->lcmd = NULL; + mcl->req = MCL_AVAILABLE; + + reconn_cb(mdl, gerr, user_data); + if (!gerr) + return close; + + g_error_free(gerr); + shutdown_mdl(mdl); + update_mcl_state(mcl); + + if (rsp->rc != MCAP_INVALID_MDL) + return close; + + /* Remove cached mdlid */ + mcl->mdls = g_slist_remove(mcl->mdls, mdl); + mcl->cb->mdl_deleted(mdl, mcl->cb->user_data); + mcap_mdl_unref(mdl); + + return close; +} + +static gboolean process_md_abort_mdl_rsp(struct mcap_mcl *mcl, + mcap_rsp *rsp, uint32_t len) +{ + struct mcap_mdl_op_cb *abrt = mcl->priv_data; + mcap_mdl_notify_cb abrt_cb = abrt->cb.notify; + gpointer user_data = abrt->user_data; + struct mcap_mdl *mdl = abrt->mdl; + GError *gerr = NULL; + gboolean close; + + close = check_err_rsp(mcl, rsp, len, sizeof(mcap_rsp), &gerr); + + g_free(mcl->lcmd); + mcl->lcmd = NULL; + mcl->req = MCL_AVAILABLE; + + abrt_cb(gerr, user_data); + shutdown_mdl(mdl); + + if (len >= sizeof(mcap_rsp) && rsp->rc == MCAP_INVALID_MDL) { + mcl->mdls = g_slist_remove(mcl->mdls, mdl); + mcl->cb->mdl_deleted(mdl, mcl->cb->user_data); + mcap_mdl_unref(mdl); + } + + if (gerr) + g_error_free(gerr); + + update_mcl_state(mcl); + + return close; +} + +static void restore_mdl(gpointer elem, gpointer data) +{ + struct mcap_mdl *mdl = elem; + + if (mdl->state == MDL_DELETING) { + if (mdl->dc) + mdl->state = MDL_CONNECTED; + else + mdl->state = MDL_CLOSED; + } else if (mdl->state == MDL_CLOSED) + mdl->mcl->cb->mdl_closed(mdl, mdl->mcl->cb->user_data); +} + +static void check_mdl_del_err(struct mcap_mdl *mdl, mcap_rsp *rsp) +{ + if (rsp->rc != MCAP_ERROR_INVALID_MDL) { + restore_mdl(mdl, NULL); + return; + } + + /* MDL does not exist in remote side, we can delete it */ + mdl->mcl->mdls = g_slist_remove(mdl->mcl->mdls, mdl); + mcap_mdl_unref(mdl); +} + +static gboolean process_md_delete_mdl_rsp(struct mcap_mcl *mcl, mcap_rsp *rsp, + uint32_t len) +{ + struct mcap_mdl_op_cb *del = mcl->priv_data; + struct mcap_mdl *mdl = del->mdl; + mcap_mdl_notify_cb deleted_cb = del->cb.notify; + gpointer user_data = del->user_data; + mcap_md_req *cmdlast = (mcap_md_req *) mcl->lcmd; + uint16_t mdlid = ntohs(cmdlast->mdl); + GError *gerr = NULL; + gboolean close; + gboolean notify = FALSE; + + close = check_err_rsp(mcl, rsp, len, sizeof(mcap_rsp), &gerr); + + g_free(mcl->lcmd); + mcl->lcmd = NULL; + mcl->req = MCL_AVAILABLE; + + if (gerr) { + if (mdl) + check_mdl_del_err(mdl, rsp); + else + g_slist_foreach(mcl->mdls, restore_mdl, NULL); + deleted_cb(gerr, user_data); + g_error_free(gerr); + return close; + } + + if (mdlid == MCAP_ALL_MDLIDS) { + g_slist_foreach(mcl->mdls, mcap_del_mdl, ¬ify); + g_slist_free(mcl->mdls); + mcl->mdls = NULL; + mcl->state = MCL_CONNECTED; + } else { + mcl->mdls = g_slist_remove(mcl->mdls, mdl); + update_mcl_state(mcl); + mcap_del_mdl(mdl, ¬ify); + } + + deleted_cb(gerr, user_data); + + return close; +} + +static void post_process_rsp(struct mcap_mcl *mcl, struct mcap_mdl_op_cb *op) +{ + if (mcl->priv_data != op) { + /* Queued MCAP request in some callback. */ + /* We should not delete the mcl private data */ + free_mcap_mdl_op(op); + } else { + /* This is not a queued request. It's safe */ + /* delete the mcl private data here. */ + free_mcl_priv_data(mcl); + } +} + +static void proc_response(struct mcap_mcl *mcl, void *buf, uint32_t len) +{ + struct mcap_mdl_op_cb *op = mcl->priv_data; + mcap_rsp *rsp = buf; + gboolean close; + + RELEASE_TIMER(mcl); + + switch (mcl->lcmd[0] + 1) { + case MCAP_MD_CREATE_MDL_RSP: + close = process_md_create_mdl_rsp(mcl, rsp, len); + post_process_rsp(mcl, op); + break; + case MCAP_MD_RECONNECT_MDL_RSP: + close = process_md_reconnect_mdl_rsp(mcl, rsp, len); + post_process_rsp(mcl, op); + break; + case MCAP_MD_ABORT_MDL_RSP: + close = process_md_abort_mdl_rsp(mcl, rsp, len); + post_process_rsp(mcl, op); + break; + case MCAP_MD_DELETE_MDL_RSP: + close = process_md_delete_mdl_rsp(mcl, rsp, len); + post_process_rsp(mcl, op); + break; + default: + DBG("Unknown cmd response received (op code = %d)", rsp->op); + close = TRUE; + break; + } + + if (close) { + mcl->mi->mcl_disconnected_cb(mcl, mcl->mi->user_data); + mcap_cache_mcl(mcl); + } +} + +static void proc_cmd(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + GError *gerr = NULL; + + if (cmd[0] > MCAP_MD_SYNC_INFO_IND || + (cmd[0] > MCAP_MD_DELETE_MDL_RSP && + cmd[0] < MCAP_MD_SYNC_CAP_REQ)) { + error("Unknown cmd received (op code = %d)", cmd[0]); + mcap_send_cmd(mcl, MCAP_ERROR_RSP, MCAP_INVALID_OP_CODE, + MCAP_MDLID_RESERVED, NULL, 0); + return; + } + + if (cmd[0] >= MCAP_MD_SYNC_CAP_REQ && + cmd[0] <= MCAP_MD_SYNC_INFO_IND) { + proc_sync_cmd(mcl, cmd, len); + return; + } + + if (!(mcl->ctrl & MCAP_CTRL_STD_OP)) { + /* In case the remote device doesn't work correctly */ + error("Remote device does not support opcodes, cmd ignored"); + return; + } + + if (mcl->req == MCL_WAITING_RSP) { + if (cmd[0] & 0x01) { + /* Request arrived when a response is expected */ + if (mcl->role == MCL_INITIATOR) + /* ignore */ + return; + /* Initiator will ignore our last request */ + RELEASE_TIMER(mcl); + mcl->req = MCL_AVAILABLE; + g_set_error(&gerr, MCAP_ERROR, MCAP_ERROR_REQ_IGNORED, + "Initiator sent a request with more priority"); + mcap_notify_error(mcl, gerr); + proc_req[mcl->state](mcl, cmd, len); + return; + } + proc_response(mcl, cmd, len); + } else if (cmd[0] & 0x01) + proc_req[mcl->state](mcl, cmd, len); +} + +static gboolean mdl_event_cb(GIOChannel *chan, GIOCondition cond, gpointer data) +{ + + struct mcap_mdl *mdl = data; + gboolean notify; + + DBG("Close MDL %d", mdl->mdlid); + + notify = (mdl->state == MDL_CONNECTED); + shutdown_mdl(mdl); + + update_mcl_state(mdl->mcl); + + if (notify) { + /*Callback to upper layer */ + mdl->mcl->cb->mdl_closed(mdl, mdl->mcl->cb->user_data); + } + + return FALSE; +} + +static void mcap_connect_mdl_cb(GIOChannel *chan, GError *conn_err, + gpointer data) +{ + struct mcap_mdl_op_cb *con = data; + struct mcap_mdl *mdl = con->mdl; + mcap_mdl_operation_cb cb = con->cb.op; + gpointer user_data = con->user_data; + + DBG("mdl connect callback"); + + if (conn_err) { + DBG("ERROR: mdl connect callback"); + mdl->state = MDL_CLOSED; + g_io_channel_unref(mdl->dc); + mdl->dc = NULL; + cb(mdl, conn_err, user_data); + return; + } + + mdl->state = MDL_CONNECTED; + mdl->wid = g_io_add_watch_full(mdl->dc, G_PRIORITY_DEFAULT, + G_IO_ERR | G_IO_HUP | G_IO_NVAL, + (GIOFunc) mdl_event_cb, + mcap_mdl_ref(mdl), + (GDestroyNotify) mcap_mdl_unref); + + cb(mdl, conn_err, user_data); +} + +gboolean mcap_connect_mdl(struct mcap_mdl *mdl, uint8_t mode, + uint16_t dcpsm, + mcap_mdl_operation_cb connect_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err) +{ + struct mcap_mdl_op_cb *con; + + if (mdl->state != MDL_WAITING) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_INVALID_MDL, + "%s", error2str(MCAP_INVALID_MDL)); + return FALSE; + } + + if ((mode != L2CAP_MODE_ERTM) && (mode != L2CAP_MODE_STREAMING)) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_INVALID_ARGS, + "Invalid MDL configuration"); + return FALSE; + } + + con = g_new0(struct mcap_mdl_op_cb, 1); + con->mdl = mcap_mdl_ref(mdl); + con->cb.op = connect_cb; + con->destroy = destroy; + con->user_data = user_data; + + mdl->dc = bt_io_connect(mcap_connect_mdl_cb, con, + (GDestroyNotify) free_mcap_mdl_op, err, + BT_IO_OPT_SOURCE_BDADDR, &mdl->mcl->mi->src, + BT_IO_OPT_DEST_BDADDR, &mdl->mcl->addr, + BT_IO_OPT_PSM, dcpsm, + BT_IO_OPT_MTU, MCAP_DC_MTU, + BT_IO_OPT_SEC_LEVEL, mdl->mcl->mi->sec, + BT_IO_OPT_MODE, mode, + BT_IO_OPT_INVALID); + if (!mdl->dc) { + DBG("MDL Connection error"); + mdl->state = MDL_CLOSED; + mcap_mdl_unref(con->mdl); + g_free(con); + return FALSE; + } + + return TRUE; +} + +static gboolean mcl_control_cb(GIOChannel *chan, GIOCondition cond, + gpointer data) +{ + GError *gerr = NULL; + struct mcap_mcl *mcl = data; + int sk, len; + uint8_t buf[MCAP_CC_MTU]; + + if (cond & (G_IO_ERR | G_IO_HUP | G_IO_NVAL)) + goto fail; + + sk = g_io_channel_unix_get_fd(chan); + len = read(sk, buf, sizeof(buf)); + if (len < 0) + goto fail; + + proc_cmd(mcl, buf, (uint32_t) len); + return TRUE; + +fail: + if (mcl->state != MCL_IDLE) { + if (mcl->req == MCL_WAITING_RSP) { + /* notify error in pending callback */ + g_set_error(&gerr, MCAP_ERROR, MCAP_ERROR_MCL_CLOSED, + "MCL closed"); + mcap_notify_error(mcl, gerr); + g_error_free(gerr); + } + mcl->mi->mcl_disconnected_cb(mcl, mcl->mi->user_data); + } + mcap_cache_mcl(mcl); + return FALSE; +} + +static void mcap_connect_mcl_cb(GIOChannel *chan, GError *conn_err, + gpointer user_data) +{ + char dstaddr[18]; + struct connect_mcl *con = user_data; + struct mcap_mcl *aux, *mcl = con->mcl; + mcap_mcl_connect_cb connect_cb = con->connect_cb; + gpointer data = con->user_data; + GError *gerr = NULL; + + mcl->ctrl &= ~MCAP_CTRL_CONN; + + if (conn_err) { + if (mcl->ctrl & MCAP_CTRL_FREE) { + mcap_mcl_release(mcl); + mcl->mi->mcl_uncached_cb(mcl, mcl->mi->user_data); + } + connect_cb(NULL, conn_err, data); + return; + } + + ba2str(&mcl->addr, dstaddr); + + aux = find_mcl(mcl->mi->mcls, &mcl->addr); + if (aux) { + /* Double MCL connection case */ + error("MCL error: Device %s is already connected", dstaddr); + g_set_error(&gerr, MCAP_ERROR, MCAP_ERROR_ALREADY_EXISTS, + "MCL %s is already connected", dstaddr); + connect_cb(NULL, gerr, data); + g_error_free(gerr); + return; + } + + mcl->state = MCL_CONNECTED; + mcl->role = MCL_INITIATOR; + mcl->req = MCL_AVAILABLE; + mcl->ctrl |= MCAP_CTRL_STD_OP; + + mcap_sync_init(mcl); + + if (mcl->ctrl & MCAP_CTRL_CACHED) + mcap_uncache_mcl(mcl); + else { + mcl->ctrl &= ~MCAP_CTRL_FREE; + mcl->mi->mcls = g_slist_prepend(mcl->mi->mcls, + mcap_mcl_ref(mcl)); + } + + mcl->wid = g_io_add_watch_full(mcl->cc, G_PRIORITY_DEFAULT, + G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, + (GIOFunc) mcl_control_cb, + mcap_mcl_ref(mcl), + (GDestroyNotify) mcap_mcl_unref); + connect_cb(mcl, gerr, data); +} + +static void set_mdl_properties(GIOChannel *chan, struct mcap_mdl *mdl) +{ + struct mcap_mcl *mcl = mdl->mcl; + + mdl->state = MDL_CONNECTED; + mdl->dc = g_io_channel_ref(chan); + mdl->wid = g_io_add_watch_full(mdl->dc, G_PRIORITY_DEFAULT, + G_IO_ERR | G_IO_HUP | G_IO_NVAL, + (GIOFunc) mdl_event_cb, + mcap_mdl_ref(mdl), + (GDestroyNotify) mcap_mdl_unref); + + mcl->state = MCL_ACTIVE; + mcl->cb->mdl_connected(mdl, mcl->cb->user_data); +} + +static void mcl_io_destroy(gpointer data) +{ + struct connect_mcl *con = data; + + mcap_mcl_unref(con->mcl); + if (con->destroy) + con->destroy(con->user_data); + g_free(con); +} + +gboolean mcap_create_mcl(struct mcap_instance *mi, + const bdaddr_t *addr, + uint16_t ccpsm, + mcap_mcl_connect_cb connect_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err) +{ + struct mcap_mcl *mcl; + struct connect_mcl *con; + + mcl = find_mcl(mi->mcls, addr); + if (mcl) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_ALREADY_EXISTS, + "MCL is already connected."); + return FALSE; + } + + mcl = find_mcl(mi->cached, addr); + if (!mcl) { + mcl = g_new0(struct mcap_mcl, 1); + mcl->mi = mcap_instance_ref(mi); + mcl->state = MCL_IDLE; + bacpy(&mcl->addr, addr); + set_default_cb(mcl); + mcl->next_mdl = (rand() % MCAP_MDLID_FINAL) + 1; + } + + mcl->ctrl |= MCAP_CTRL_CONN; + + con = g_new0(struct connect_mcl, 1); + con->mcl = mcap_mcl_ref(mcl); + con->connect_cb = connect_cb; + con->destroy = destroy; + con->user_data = user_data; + + mcl->cc = bt_io_connect(mcap_connect_mcl_cb, con, + mcl_io_destroy, err, + BT_IO_OPT_SOURCE_BDADDR, &mi->src, + BT_IO_OPT_DEST_BDADDR, addr, + BT_IO_OPT_PSM, ccpsm, + BT_IO_OPT_MTU, MCAP_CC_MTU, + BT_IO_OPT_SEC_LEVEL, mi->sec, + BT_IO_OPT_MODE, L2CAP_MODE_ERTM, + BT_IO_OPT_INVALID); + if (!mcl->cc) { + mcl->ctrl &= ~MCAP_CTRL_CONN; + if (mcl->ctrl & MCAP_CTRL_FREE) { + mcap_mcl_release(mcl); + mcl->mi->mcl_uncached_cb(mcl, mcl->mi->user_data); + } + mcap_mcl_unref(con->mcl); + g_free(con); + return FALSE; + } + + return TRUE; +} + +static void connect_dc_event_cb(GIOChannel *chan, GError *gerr, + gpointer user_data) +{ + struct mcap_instance *mi = user_data; + struct mcap_mcl *mcl; + struct mcap_mdl *mdl; + GError *err = NULL; + bdaddr_t dst; + GSList *l; + + if (gerr) + return; + + bt_io_get(chan, &err, BT_IO_OPT_DEST_BDADDR, &dst, BT_IO_OPT_INVALID); + if (err) { + error("%s", err->message); + g_error_free(err); + goto drop; + } + + mcl = find_mcl(mi->mcls, &dst); + if (!mcl || mcl->state != MCL_PENDING) + goto drop; + + for (l = mcl->mdls; l; l = l->next) { + mdl = l->data; + if (mdl->state == MDL_WAITING) { + set_mdl_properties(chan, mdl); + return; + } + } + +drop: + g_io_channel_shutdown(chan, TRUE, NULL); +} + +static void set_mcl_conf(GIOChannel *chan, struct mcap_mcl *mcl) +{ + gboolean reconn; + + mcl->state = MCL_CONNECTED; + mcl->role = MCL_ACCEPTOR; + mcl->req = MCL_AVAILABLE; + mcl->cc = g_io_channel_ref(chan); + mcl->ctrl |= MCAP_CTRL_STD_OP; + + mcap_sync_init(mcl); + + reconn = (mcl->ctrl & MCAP_CTRL_CACHED); + if (reconn) + mcap_uncache_mcl(mcl); + else + mcl->mi->mcls = g_slist_prepend(mcl->mi->mcls, + mcap_mcl_ref(mcl)); + + mcl->wid = g_io_add_watch_full(mcl->cc, G_PRIORITY_DEFAULT, + G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, + (GIOFunc) mcl_control_cb, + mcap_mcl_ref(mcl), + (GDestroyNotify) mcap_mcl_unref); + + /* Callback to report new MCL */ + if (reconn) + mcl->mi->mcl_reconnected_cb(mcl, mcl->mi->user_data); + else + mcl->mi->mcl_connected_cb(mcl, mcl->mi->user_data); +} + +static void connect_mcl_event_cb(GIOChannel *chan, GError *gerr, + gpointer user_data) +{ + struct mcap_instance *mi = user_data; + struct mcap_mcl *mcl; + bdaddr_t dst; + char address[18], srcstr[18]; + GError *err = NULL; + + if (gerr) + return; + + bt_io_get(chan, &err, + BT_IO_OPT_DEST_BDADDR, &dst, + BT_IO_OPT_DEST, address, + BT_IO_OPT_INVALID); + if (err) { + error("%s", err->message); + g_error_free(err); + goto drop; + } + + ba2str(&mi->src, srcstr); + mcl = find_mcl(mi->mcls, &dst); + if (mcl) { + error("Control channel already created with %s on adapter %s", + address, srcstr); + goto drop; + } + + mcl = find_mcl(mi->cached, &dst); + if (!mcl) { + mcl = g_new0(struct mcap_mcl, 1); + mcl->mi = mcap_instance_ref(mi); + bacpy(&mcl->addr, &dst); + set_default_cb(mcl); + mcl->next_mdl = (rand() % MCAP_MDLID_FINAL) + 1; + } + + set_mcl_conf(chan, mcl); + + return; +drop: + g_io_channel_shutdown(chan, TRUE, NULL); +} + +struct mcap_instance *mcap_create_instance(const bdaddr_t *src, + BtIOSecLevel sec, + uint16_t ccpsm, + uint16_t dcpsm, + mcap_mcl_event_cb mcl_connected, + mcap_mcl_event_cb mcl_reconnected, + mcap_mcl_event_cb mcl_disconnected, + mcap_mcl_event_cb mcl_uncached, + mcap_info_ind_event_cb mcl_sync_info_ind, + gpointer user_data, + GError **gerr) +{ + struct mcap_instance *mi; + + if (sec < BT_IO_SEC_MEDIUM) { + g_set_error(gerr, MCAP_ERROR, MCAP_ERROR_INVALID_ARGS, + "Security level can't be minor of %d", + BT_IO_SEC_MEDIUM); + return NULL; + } + + if (!(mcl_connected && mcl_reconnected && + mcl_disconnected && mcl_uncached)) { + g_set_error(gerr, MCAP_ERROR, MCAP_ERROR_INVALID_ARGS, + "The callbacks can't be null"); + return NULL; + } + + mi = g_new0(struct mcap_instance, 1); + + bacpy(&mi->src, src); + + mi->sec = sec; + mi->mcl_connected_cb = mcl_connected; + mi->mcl_reconnected_cb = mcl_reconnected; + mi->mcl_disconnected_cb = mcl_disconnected; + mi->mcl_uncached_cb = mcl_uncached; + mi->mcl_sync_infoind_cb = mcl_sync_info_ind; + mi->user_data = user_data; + mi->csp_enabled = FALSE; + + /* Listen incoming connections in control channel */ + mi->ccio = bt_io_listen(connect_mcl_event_cb, NULL, mi, + NULL, gerr, + BT_IO_OPT_SOURCE_BDADDR, &mi->src, + BT_IO_OPT_PSM, ccpsm, + BT_IO_OPT_MTU, MCAP_CC_MTU, + BT_IO_OPT_SEC_LEVEL, sec, + BT_IO_OPT_MODE, L2CAP_MODE_ERTM, + BT_IO_OPT_INVALID); + if (!mi->ccio) { + error("%s", (*gerr)->message); + g_free(mi); + return NULL; + } + + /* Listen incoming connections in data channels */ + mi->dcio = bt_io_listen(connect_dc_event_cb, NULL, mi, + NULL, gerr, + BT_IO_OPT_SOURCE_BDADDR, &mi->src, + BT_IO_OPT_PSM, dcpsm, + BT_IO_OPT_MTU, MCAP_DC_MTU, + BT_IO_OPT_SEC_LEVEL, sec, + BT_IO_OPT_INVALID); + if (!mi->dcio) { + g_io_channel_shutdown(mi->ccio, TRUE, NULL); + g_io_channel_unref(mi->ccio); + mi->ccio = NULL; + error("%s", (*gerr)->message); + g_free(mi); + return NULL; + } + + /* Initialize random seed to generate mdlids for this instance */ + srand(time(NULL)); + + return mcap_instance_ref(mi); +} + +void mcap_release_instance(struct mcap_instance *mi) +{ + GSList *l; + + if (!mi) + return; + + if (mi->ccio) { + g_io_channel_shutdown(mi->ccio, TRUE, NULL); + g_io_channel_unref(mi->ccio); + mi->ccio = NULL; + } + + if (mi->dcio) { + g_io_channel_shutdown(mi->dcio, TRUE, NULL); + g_io_channel_unref(mi->dcio); + mi->dcio = NULL; + } + + for (l = mi->mcls; l; l = l->next) { + mcap_mcl_release(l->data); + mcap_mcl_unref(l->data); + } + + g_slist_free(mi->mcls); + mi->mcls = NULL; + + for (l = mi->cached; l; l = l->next) { + mcap_mcl_release(l->data); + mcap_mcl_unref(l->data); + } + + g_slist_free(mi->cached); + mi->cached = NULL; +} + +struct mcap_instance *mcap_instance_ref(struct mcap_instance *mi) +{ + mi->ref++; + + DBG("mcap_instance_ref(%p): ref=%d", mi, mi->ref); + + return mi; +} + +void mcap_instance_unref(struct mcap_instance *mi) +{ + mi->ref--; + + DBG("mcap_instance_unref(%p): ref=%d", mi, mi->ref); + + if (mi->ref > 0) + return; + + mcap_release_instance(mi); + g_free(mi); +} + +uint16_t mcap_get_ctrl_psm(struct mcap_instance *mi, GError **err) +{ + uint16_t lpsm; + + if (!(mi && mi->ccio)) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_INVALID_ARGS, + "Invalid MCAP instance"); + return 0; + } + + if (!bt_io_get(mi->ccio, err, BT_IO_OPT_PSM, &lpsm, BT_IO_OPT_INVALID)) + return 0; + + return lpsm; +} + +uint16_t mcap_get_data_psm(struct mcap_instance *mi, GError **err) +{ + uint16_t lpsm; + + if (!(mi && mi->dcio)) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_INVALID_ARGS, + "Invalid MCAP instance"); + return 0; + } + + if (!bt_io_get(mi->dcio, err, BT_IO_OPT_PSM, &lpsm, BT_IO_OPT_INVALID)) + return 0; + + return lpsm; +} + +gboolean mcap_set_data_chan_mode(struct mcap_instance *mi, uint8_t mode, + GError **err) +{ + if (!(mi && mi->dcio)) { + g_set_error(err, MCAP_ERROR, MCAP_ERROR_INVALID_ARGS, + "Invalid MCAP instance"); + return FALSE; + } + + return bt_io_set(mi->dcio, err, BT_IO_OPT_MODE, mode, + BT_IO_OPT_INVALID); +} + +struct mcap_mdl *mcap_mdl_ref(struct mcap_mdl *mdl) +{ + mdl->ref++; + + DBG("mcap_mdl_ref(%p): ref=%d", mdl, mdl->ref); + + return mdl; +} + +void mcap_mdl_unref(struct mcap_mdl *mdl) +{ + mdl->ref--; + + DBG("mcap_mdl_unref(%p): ref=%d", mdl, mdl->ref); + + if (mdl->ref > 0) + return; + + free_mdl(mdl); +} + + +static int send_sync_cmd(struct mcap_mcl *mcl, const void *buf, uint32_t size) +{ + int sock; + + if (mcl->cc == NULL) + return -1; + + sock = g_io_channel_unix_get_fd(mcl->cc); + return mcap_send_data(sock, buf, size); +} + +static int send_unsupported_cap_req(struct mcap_mcl *mcl) +{ + mcap_md_sync_cap_rsp *cmd; + int sent; + + cmd = g_new0(mcap_md_sync_cap_rsp, 1); + cmd->op = MCAP_MD_SYNC_CAP_RSP; + cmd->rc = MCAP_REQUEST_NOT_SUPPORTED; + + sent = send_sync_cmd(mcl, cmd, sizeof(*cmd)); + g_free(cmd); + + return sent; +} + +static int send_unsupported_set_req(struct mcap_mcl *mcl) +{ + mcap_md_sync_set_rsp *cmd; + int sent; + + cmd = g_new0(mcap_md_sync_set_rsp, 1); + cmd->op = MCAP_MD_SYNC_SET_RSP; + cmd->rc = MCAP_REQUEST_NOT_SUPPORTED; + + sent = send_sync_cmd(mcl, cmd, sizeof(*cmd)); + g_free(cmd); + + return sent; +} + +static void reset_tmstamp(struct mcap_csp *csp, struct timespec *base_time, + uint64_t new_tmstamp) +{ + csp->base_tmstamp = new_tmstamp; + if (base_time) + csp->base_time = *base_time; + else + clock_gettime(CLK, &csp->base_time); +} + +void mcap_sync_init(struct mcap_mcl *mcl) +{ + if (!mcl->mi->csp_enabled) { + mcl->csp = NULL; + return; + } + + mcl->csp = g_new0(struct mcap_csp, 1); + + mcl->csp->rem_req_acc = 10000; /* safe divisor */ + mcl->csp->set_data = NULL; + mcl->csp->csp_priv_data = NULL; + + reset_tmstamp(mcl->csp, NULL, 0); +} + +void mcap_sync_stop(struct mcap_mcl *mcl) +{ + if (!mcl->csp) + return; + + if (mcl->csp->ind_timer) + g_source_remove(mcl->csp->ind_timer); + + if (mcl->csp->set_timer) + g_source_remove(mcl->csp->set_timer); + + if (mcl->csp->set_data) + g_free(mcl->csp->set_data); + + if (mcl->csp->csp_priv_data) + g_free(mcl->csp->csp_priv_data); + + mcl->csp->ind_timer = 0; + mcl->csp->set_timer = 0; + mcl->csp->set_data = NULL; + mcl->csp->csp_priv_data = NULL; + + g_free(mcl->csp); + mcl->csp = NULL; +} + +static uint64_t time_us(struct timespec *tv) +{ + return tv->tv_sec * 1000000 + tv->tv_nsec / 1000; +} + +static int64_t bt2us(int bt) +{ + return bt * 312.5; +} + +static int bt2ms(int bt) +{ + return bt * 312.5 / 1000; +} + +static int btoffset(uint32_t btclk1, uint32_t btclk2) +{ + int offset = btclk2 - btclk1; + + if (offset <= -MCAP_BTCLOCK_HALF) + offset += MCAP_BTCLOCK_FIELD; + else if (offset > MCAP_BTCLOCK_HALF) + offset -= MCAP_BTCLOCK_FIELD; + + return offset; +} + +static int btdiff(uint32_t btclk1, uint32_t btclk2) +{ + return btoffset(btclk1, btclk2); +} + +static gboolean valid_btclock(uint32_t btclk) +{ + return btclk <= MCAP_BTCLOCK_MAX; +} + +/* This call may fail; either deal with retry or use read_btclock_retry */ +static gboolean read_btclock(struct mcap_mcl *mcl, uint32_t *btclock, + uint16_t *btaccuracy) +{ +/* int which = 1; + struct btd_adapter *adapter; + + adapter = adapter_find(&mcl->mi->src); + if (!adapter) + return FALSE; + + if (btd_adapter_read_clock(adapter, &mcl->addr, which, 1000, + btclock, btaccuracy) < 0) + return FALSE; + + return TRUE; +*/ + return FALSE; +} + +static gboolean read_btclock_retry(struct mcap_mcl *mcl, uint32_t *btclock, + uint16_t *btaccuracy) +{ + int retries = 5; + + while (--retries >= 0) { + if (read_btclock(mcl, btclock, btaccuracy)) + return TRUE; + DBG("CSP: retrying to read bt clock..."); + } + + return FALSE; +} + +static gboolean get_btrole(struct mcap_mcl *mcl) +{ + int sock, flags; + socklen_t len; + + if (mcl->cc == NULL) + return -1; + + sock = g_io_channel_unix_get_fd(mcl->cc); + len = sizeof(flags); + + if (getsockopt(sock, SOL_L2CAP, L2CAP_LM, &flags, &len)) + DBG("CSP: could not read role"); + + return flags & L2CAP_LM_MASTER; +} + +uint64_t mcap_get_timestamp(struct mcap_mcl *mcl, + struct timespec *given_time) +{ + struct timespec now; + uint64_t tmstamp; + + if (!mcl->csp) + return MCAP_TMSTAMP_DONTSET; + + if (given_time) + now = *given_time; + else + clock_gettime(CLK, &now); + + tmstamp = time_us(&now) - time_us(&mcl->csp->base_time) + + mcl->csp->base_tmstamp; + + return tmstamp; +} + +uint32_t mcap_get_btclock(struct mcap_mcl *mcl) +{ + uint32_t btclock; + uint16_t accuracy; + + if (!mcl->csp) + return MCAP_BTCLOCK_IMMEDIATE; + + if (!read_btclock_retry(mcl, &btclock, &accuracy)) + btclock = 0xffffffff; + + return btclock; +} + +static gboolean initialize_caps(struct mcap_mcl *mcl) +{ + struct timespec t1, t2; + int latencies[SAMPLE_COUNT]; + int latency, avg, dev; + uint32_t btclock; + uint16_t btaccuracy; + int i; + int retries; + + clock_getres(CLK, &t1); + + _caps.ts_res = time_us(&t1); + if (_caps.ts_res < 1) + _caps.ts_res = 1; + + _caps.ts_acc = 20; /* ppm, estimated */ + + /* A little exercise before measuing latency */ + clock_gettime(CLK, &t1); + read_btclock_retry(mcl, &btclock, &btaccuracy); + + /* Read clock a number of times and measure latency */ + avg = 0; + i = 0; + retries = MAX_RETRIES; + while (i < SAMPLE_COUNT && retries > 0) { + clock_gettime(CLK, &t1); + if (!read_btclock(mcl, &btclock, &btaccuracy)) { + retries--; + continue; + } + clock_gettime(CLK, &t2); + + latency = time_us(&t2) - time_us(&t1); + latencies[i] = latency; + avg += latency; + i++; + } + + if (retries <= 0) + return FALSE; + + /* Calculate average and deviation */ + avg /= SAMPLE_COUNT; + dev = 0; + for (i = 0; i < SAMPLE_COUNT; ++i) + dev += abs(latencies[i] - avg); + dev /= SAMPLE_COUNT; + + /* Calculate corrected average, without 'freak' latencies */ + latency = 0; + for (i = 0; i < SAMPLE_COUNT; ++i) { + if (latencies[i] > (avg + dev * 6)) + latency += avg; + else + latency += latencies[i]; + } + latency /= SAMPLE_COUNT; + + _caps.latency = latency; + _caps.preempt_thresh = latency * 4; + _caps.syncleadtime_ms = latency * 50 / 1000; + + csp_caps_initialized = TRUE; + return TRUE; +} + +static struct csp_caps *caps(struct mcap_mcl *mcl) +{ + if (!csp_caps_initialized) + if (!initialize_caps(mcl)) { + /* Temporary failure in reading BT clock */ + return NULL; + } + + return &_caps; +} + +static int send_sync_cap_rsp(struct mcap_mcl *mcl, uint8_t rspcode, + uint8_t btclockres, uint16_t synclead, + uint16_t tmstampres, uint16_t tmstampacc) +{ + mcap_md_sync_cap_rsp *rsp; + int sent; + + rsp = g_new0(mcap_md_sync_cap_rsp, 1); + + rsp->op = MCAP_MD_SYNC_CAP_RSP; + rsp->rc = rspcode; + + rsp->btclock = btclockres; + rsp->sltime = htons(synclead); + rsp->timestnr = htons(tmstampres); + rsp->timestna = htons(tmstampacc); + + sent = send_sync_cmd(mcl, rsp, sizeof(*rsp)); + g_free(rsp); + + return sent; +} + +static void proc_sync_cap_req(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + mcap_md_sync_cap_req *req; + uint16_t required_accuracy; + uint16_t our_accuracy; + uint32_t btclock; + uint16_t btres; + + if (len != sizeof(mcap_md_sync_cap_req)) { + send_sync_cap_rsp(mcl, MCAP_INVALID_PARAM_VALUE, + 0, 0, 0, 0); + return; + } + + if (!caps(mcl)) { + send_sync_cap_rsp(mcl, MCAP_RESOURCE_UNAVAILABLE, + 0, 0, 0, 0); + return; + } + + req = (mcap_md_sync_cap_req *) cmd; + required_accuracy = ntohs(req->timest); + our_accuracy = caps(mcl)->ts_acc; + btres = 0; + + if (required_accuracy < our_accuracy || required_accuracy < 1) { + send_sync_cap_rsp(mcl, MCAP_RESOURCE_UNAVAILABLE, + 0, 0, 0, 0); + return; + } + + if (!read_btclock_retry(mcl, &btclock, &btres)) { + send_sync_cap_rsp(mcl, MCAP_RESOURCE_UNAVAILABLE, + 0, 0, 0, 0); + return; + } + + mcl->csp->remote_caps = 1; + mcl->csp->rem_req_acc = required_accuracy; + + send_sync_cap_rsp(mcl, MCAP_SUCCESS, btres, + caps(mcl)->syncleadtime_ms, + caps(mcl)->ts_res, our_accuracy); +} + +static int send_sync_set_rsp(struct mcap_mcl *mcl, uint8_t rspcode, + uint32_t btclock, uint64_t timestamp, + uint16_t tmstampres) +{ + mcap_md_sync_set_rsp *rsp; + int sent; + + rsp = g_new0(mcap_md_sync_set_rsp, 1); + + rsp->op = MCAP_MD_SYNC_SET_RSP; + rsp->rc = rspcode; + rsp->btclock = htonl(btclock); + rsp->timestst = hton64(timestamp); + rsp->timestsa = htons(tmstampres); + + sent = send_sync_cmd(mcl, rsp, sizeof(*rsp)); + g_free(rsp); + + return sent; +} + +static gboolean get_all_clocks(struct mcap_mcl *mcl, uint32_t *btclock, + struct timespec *base_time, + uint64_t *timestamp) +{ + int latency; + int retry = 5; + uint16_t btres; + struct timespec t0; + + if (!caps(mcl)) + return FALSE; + + latency = caps(mcl)->preempt_thresh + 1; + + while (latency > caps(mcl)->preempt_thresh && --retry >= 0) { + + clock_gettime(CLK, &t0); + + if (!read_btclock(mcl, btclock, &btres)) + continue; + + clock_gettime(CLK, base_time); + + /* Tries to detect preemption between clock_gettime + * and read_btclock by measuring transaction time + */ + latency = time_us(base_time) - time_us(&t0); + } + + *timestamp = mcap_get_timestamp(mcl, base_time); + + return TRUE; +} + +static gboolean sync_send_indication(gpointer user_data) +{ + struct mcap_mcl *mcl; + mcap_md_sync_info_ind *cmd; + uint32_t btclock; + uint64_t tmstamp; + struct timespec base_time; + int sent; + + if (!user_data) + return FALSE; + + mcl = user_data; + + if (!caps(mcl)) + return FALSE; + + if (!get_all_clocks(mcl, &btclock, &base_time, &tmstamp)) + return FALSE; + + cmd = g_new0(mcap_md_sync_info_ind, 1); + + cmd->op = MCAP_MD_SYNC_INFO_IND; + cmd->btclock = htonl(btclock); + cmd->timestst = hton64(tmstamp); + cmd->timestsa = htons(caps(mcl)->latency); + + sent = send_sync_cmd(mcl, cmd, sizeof(*cmd)); + g_free(cmd); + + return !sent; +} + +static gboolean proc_sync_set_req_phase2(gpointer user_data) +{ + struct mcap_mcl *mcl; + struct sync_set_data *data; + uint8_t update; + uint32_t sched_btclock; + uint64_t new_tmstamp; + int ind_freq; + int role; + uint32_t btclock; + uint64_t tmstamp; + struct timespec base_time; + uint16_t tmstampacc; + gboolean reset; + int delay; + + if (!user_data) + return FALSE; + + mcl = user_data; + + if (!mcl->csp->set_data) + return FALSE; + + btclock = 0; + data = mcl->csp->set_data; + update = data->update; + sched_btclock = data->sched_btclock; + new_tmstamp = data->timestamp; + ind_freq = data->ind_freq; + role = data->role; + + if (!caps(mcl)) { + send_sync_set_rsp(mcl, MCAP_UNSPECIFIED_ERROR, 0, 0, 0); + return FALSE; + } + + if (!get_all_clocks(mcl, &btclock, &base_time, &tmstamp)) { + send_sync_set_rsp(mcl, MCAP_UNSPECIFIED_ERROR, 0, 0, 0); + return FALSE; + } + + if (get_btrole(mcl) != role) { + send_sync_set_rsp(mcl, MCAP_INVALID_OPERATION, 0, 0, 0); + return FALSE; + } + + reset = (new_tmstamp != MCAP_TMSTAMP_DONTSET); + + if (reset) { + if (sched_btclock != MCAP_BTCLOCK_IMMEDIATE) { + delay = bt2us(btdiff(sched_btclock, btclock)); + if (delay >= 0 || ((new_tmstamp - delay) > 0)) { + new_tmstamp += delay; + DBG("CSP: reset w/ delay %dus, compensated", + delay); + } else + DBG("CSP: reset w/ delay %dus, uncompensated", + delay); + } + + reset_tmstamp(mcl->csp, &base_time, new_tmstamp); + tmstamp = new_tmstamp; + } + + tmstampacc = caps(mcl)->latency + caps(mcl)->ts_acc; + + if (mcl->csp->ind_timer) { + g_source_remove(mcl->csp->ind_timer); + mcl->csp->ind_timer = 0; + } + + if (update) { + int when = ind_freq + caps(mcl)->syncleadtime_ms; + mcl->csp->ind_timer = g_timeout_add(when, + sync_send_indication, + mcl); + } + + send_sync_set_rsp(mcl, MCAP_SUCCESS, btclock, tmstamp, tmstampacc); + + /* First indication after set is immediate */ + if (update) + sync_send_indication(mcl); + + return FALSE; +} + +static void proc_sync_set_req(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + mcap_md_sync_set_req *req; + uint32_t sched_btclock, cur_btclock; + uint16_t btres; + uint8_t update; + uint64_t timestamp; + struct sync_set_data *set_data; + int phase2_delay, ind_freq, when; + + if (len != sizeof(mcap_md_sync_set_req)) { + send_sync_set_rsp(mcl, MCAP_INVALID_PARAM_VALUE, 0, 0, 0); + return; + } + + req = (mcap_md_sync_set_req *) cmd; + sched_btclock = ntohl(req->btclock); + update = req->timestui; + timestamp = ntoh64(req->timestst); + cur_btclock = 0; + + if (sched_btclock != MCAP_BTCLOCK_IMMEDIATE && + !valid_btclock(sched_btclock)) { + send_sync_set_rsp(mcl, MCAP_INVALID_PARAM_VALUE, 0, 0, 0); + return; + } + + if (update > 1) { + send_sync_set_rsp(mcl, MCAP_INVALID_PARAM_VALUE, 0, 0, 0); + return; + } + + if (!mcl->csp->remote_caps) { + /* Remote side did not ask our capabilities yet */ + send_sync_set_rsp(mcl, MCAP_INVALID_PARAM_VALUE, 0, 0, 0); + return; + } + + if (!caps(mcl)) { + send_sync_set_rsp(mcl, MCAP_UNSPECIFIED_ERROR, 0, 0, 0); + return; + } + + if (!read_btclock_retry(mcl, &cur_btclock, &btres)) { + send_sync_set_rsp(mcl, MCAP_UNSPECIFIED_ERROR, 0, 0, 0); + return; + } + + if (sched_btclock == MCAP_BTCLOCK_IMMEDIATE) + phase2_delay = 0; + else { + phase2_delay = btdiff(cur_btclock, sched_btclock); + + if (phase2_delay < 0) { + /* can not reset in the past tense */ + send_sync_set_rsp(mcl, MCAP_INVALID_PARAM_VALUE, + 0, 0, 0); + return; + } + + /* Convert to miliseconds */ + phase2_delay = bt2ms(phase2_delay); + + if (phase2_delay > 61*1000) { + /* More than 60 seconds in the future */ + send_sync_set_rsp(mcl, MCAP_INVALID_PARAM_VALUE, + 0, 0, 0); + return; + } else if (phase2_delay < caps(mcl)->latency / 1000) { + /* Too fast for us to do in time */ + send_sync_set_rsp(mcl, MCAP_INVALID_PARAM_VALUE, + 0, 0, 0); + return; + } + } + + if (update) { + /* Indication frequency: required accuracy divided by ours */ + /* Converted to milisseconds */ + ind_freq = (1000 * mcl->csp->rem_req_acc) / caps(mcl)->ts_acc; + + if (ind_freq < MAX(caps(mcl)->latency * 2 / 1000, 100)) { + /* Too frequent, we can't handle */ + send_sync_set_rsp(mcl, MCAP_INVALID_PARAM_VALUE, + 0, 0, 0); + return; + } + + DBG("CSP: indication every %dms", ind_freq); + } else + ind_freq = 0; + + if (mcl->csp->ind_timer) { + /* Old indications are no longer sent */ + g_source_remove(mcl->csp->ind_timer); + mcl->csp->ind_timer = 0; + } + + if (!mcl->csp->set_data) + mcl->csp->set_data = g_new0(struct sync_set_data, 1); + + set_data = (struct sync_set_data *) mcl->csp->set_data; + + set_data->update = update; + set_data->sched_btclock = sched_btclock; + set_data->timestamp = timestamp; + set_data->ind_freq = ind_freq; + set_data->role = get_btrole(mcl); + + /* TODO is there some way to schedule a call based directly on + * a BT clock value, instead of this estimation that uses + * the SO clock? */ + + if (phase2_delay > 0) { + when = phase2_delay + caps(mcl)->syncleadtime_ms; + mcl->csp->set_timer = g_timeout_add(when, + proc_sync_set_req_phase2, + mcl); + } else + proc_sync_set_req_phase2(mcl); + + /* First indication is immediate */ + if (update) + sync_send_indication(mcl); +} + +static void proc_sync_cap_rsp(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + mcap_md_sync_cap_rsp *rsp; + uint8_t mcap_err; + uint8_t btclockres; + uint16_t synclead; + uint16_t tmstampres; + uint16_t tmstampacc; + struct mcap_sync_cap_cbdata *cbdata; + mcap_sync_cap_cb cb; + gpointer user_data; + + if (mcl->csp->csp_req != MCAP_MD_SYNC_CAP_REQ) { + DBG("CSP: got unexpected cap respose"); + return; + } + + if (!mcl->csp->csp_priv_data) { + DBG("CSP: no priv data for cap respose"); + return; + } + + cbdata = mcl->csp->csp_priv_data; + cb = cbdata->cb; + user_data = cbdata->user_data; + g_free(cbdata); + + mcl->csp->csp_priv_data = NULL; + mcl->csp->csp_req = 0; + + if (len != sizeof(mcap_md_sync_cap_rsp)) { + DBG("CSP: got corrupted cap respose"); + return; + } + + rsp = (mcap_md_sync_cap_rsp *) cmd; + mcap_err = rsp->rc; + btclockres = rsp->btclock; + synclead = ntohs(rsp->sltime); + tmstampres = ntohs(rsp->timestnr); + tmstampacc = ntohs(rsp->timestna); + + if (!mcap_err) + mcl->csp->local_caps = TRUE; + + cb(mcl, mcap_err, btclockres, synclead, tmstampres, tmstampacc, NULL, + user_data); +} + +static void proc_sync_set_rsp(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + mcap_md_sync_set_rsp *rsp; + uint8_t mcap_err; + uint32_t btclock; + uint64_t timestamp; + uint16_t accuracy; + struct mcap_sync_set_cbdata *cbdata; + mcap_sync_set_cb cb; + gpointer user_data; + + if (mcl->csp->csp_req != MCAP_MD_SYNC_SET_REQ) { + DBG("CSP: got unexpected set respose"); + return; + } + + if (!mcl->csp->csp_priv_data) { + DBG("CSP: no priv data for set respose"); + return; + } + + cbdata = mcl->csp->csp_priv_data; + cb = cbdata->cb; + user_data = cbdata->user_data; + g_free(cbdata); + + mcl->csp->csp_priv_data = NULL; + mcl->csp->csp_req = 0; + + if (len != sizeof(mcap_md_sync_set_rsp)) { + DBG("CSP: got corrupted set respose"); + return; + } + + rsp = (mcap_md_sync_set_rsp *) cmd; + mcap_err = rsp->rc; + btclock = ntohl(rsp->btclock); + timestamp = ntoh64(rsp->timestst); + accuracy = ntohs(rsp->timestsa); + + if (!mcap_err && !valid_btclock(btclock)) + mcap_err = MCAP_ERROR_INVALID_ARGS; + + cb(mcl, mcap_err, btclock, timestamp, accuracy, NULL, user_data); +} + +static void proc_sync_info_ind(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + mcap_md_sync_info_ind *req; + struct sync_info_ind_data data; + uint32_t btclock; + + if (!mcl->csp->ind_expected) { + DBG("CSP: received unexpected info indication"); + return; + } + + if (len != sizeof(mcap_md_sync_info_ind)) + return; + + req = (mcap_md_sync_info_ind *) cmd; + + btclock = ntohl(req->btclock); + + if (!valid_btclock(btclock)) + return; + + data.btclock = btclock; + data.timestamp = ntoh64(req->timestst); + data.accuracy = ntohs(req->timestsa); + + if (mcl->mi->mcl_sync_infoind_cb) + mcl->mi->mcl_sync_infoind_cb(mcl, &data); +} + +void proc_sync_cmd(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len) +{ + if (!mcl->mi->csp_enabled || !mcl->csp) { + switch (cmd[0]) { + case MCAP_MD_SYNC_CAP_REQ: + send_unsupported_cap_req(mcl); + break; + case MCAP_MD_SYNC_SET_REQ: + send_unsupported_set_req(mcl); + break; + } + return; + } + + switch (cmd[0]) { + case MCAP_MD_SYNC_CAP_REQ: + proc_sync_cap_req(mcl, cmd, len); + break; + case MCAP_MD_SYNC_CAP_RSP: + proc_sync_cap_rsp(mcl, cmd, len); + break; + case MCAP_MD_SYNC_SET_REQ: + proc_sync_set_req(mcl, cmd, len); + break; + case MCAP_MD_SYNC_SET_RSP: + proc_sync_set_rsp(mcl, cmd, len); + break; + case MCAP_MD_SYNC_INFO_IND: + proc_sync_info_ind(mcl, cmd, len); + break; + } +} + +void mcap_sync_cap_req(struct mcap_mcl *mcl, uint16_t reqacc, + mcap_sync_cap_cb cb, gpointer user_data, + GError **err) +{ + struct mcap_sync_cap_cbdata *cbdata; + mcap_md_sync_cap_req *cmd; + + if (!mcl->mi->csp_enabled || !mcl->csp) { + g_set_error(err, + MCAP_CSP_ERROR, + MCAP_ERROR_RESOURCE_UNAVAILABLE, + "CSP not enabled for the instance"); + return; + } + + if (mcl->csp->csp_req) { + g_set_error(err, + MCAP_CSP_ERROR, + MCAP_ERROR_RESOURCE_UNAVAILABLE, + "Pending CSP request"); + return; + } + + mcl->csp->csp_req = MCAP_MD_SYNC_CAP_REQ; + cmd = g_new0(mcap_md_sync_cap_req, 1); + + cmd->op = MCAP_MD_SYNC_CAP_REQ; + cmd->timest = htons(reqacc); + + cbdata = g_new0(struct mcap_sync_cap_cbdata, 1); + cbdata->cb = cb; + cbdata->user_data = user_data; + mcl->csp->csp_priv_data = cbdata; + + send_sync_cmd(mcl, cmd, sizeof(*cmd)); + + g_free(cmd); +} + +void mcap_sync_set_req(struct mcap_mcl *mcl, uint8_t update, uint32_t btclock, + uint64_t timestamp, mcap_sync_set_cb cb, + gpointer user_data, GError **err) +{ + mcap_md_sync_set_req *cmd; + struct mcap_sync_set_cbdata *cbdata; + + if (!mcl->mi->csp_enabled || !mcl->csp) { + g_set_error(err, + MCAP_CSP_ERROR, + MCAP_ERROR_RESOURCE_UNAVAILABLE, + "CSP not enabled for the instance"); + return; + } + + if (!mcl->csp->local_caps) { + g_set_error(err, + MCAP_CSP_ERROR, + MCAP_ERROR_RESOURCE_UNAVAILABLE, + "Did not get CSP caps from slave yet"); + return; + } + + if (mcl->csp->csp_req) { + g_set_error(err, + MCAP_CSP_ERROR, + MCAP_ERROR_RESOURCE_UNAVAILABLE, + "Pending CSP request"); + return; + } + + mcl->csp->csp_req = MCAP_MD_SYNC_SET_REQ; + cmd = g_new0(mcap_md_sync_set_req, 1); + + cmd->op = MCAP_MD_SYNC_SET_REQ; + cmd->timestui = update; + cmd->btclock = htonl(btclock); + cmd->timestst = hton64(timestamp); + + mcl->csp->ind_expected = update; + + cbdata = g_new0(struct mcap_sync_set_cbdata, 1); + cbdata->cb = cb; + cbdata->user_data = user_data; + mcl->csp->csp_priv_data = cbdata; + + send_sync_cmd(mcl, cmd, sizeof(*cmd)); + + g_free(cmd); +} + +void mcap_enable_csp(struct mcap_instance *mi) +{ + mi->csp_enabled = TRUE; +} + +void mcap_disable_csp(struct mcap_instance *mi) +{ + mi->csp_enabled = FALSE; +} diff --git a/android/mcap-lib.h b/android/mcap-lib.h new file mode 100644 index 0000000..6d131bd --- /dev/null +++ b/android/mcap-lib.h @@ -0,0 +1,439 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2014 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#define MCAP_VERSION 0x0100 /* current version 01.00 */ + +/* bytes to get MCAP Supported Procedures */ +#define MCAP_SUP_PROC 0x06 + +/* maximum transmission unit for channels */ +#define MCAP_CC_MTU 48 +#define MCAP_DC_MTU 65535 + +/* MCAP Standard Op Codes */ +#define MCAP_ERROR_RSP 0x00 +#define MCAP_MD_CREATE_MDL_REQ 0x01 +#define MCAP_MD_CREATE_MDL_RSP 0x02 +#define MCAP_MD_RECONNECT_MDL_REQ 0x03 +#define MCAP_MD_RECONNECT_MDL_RSP 0x04 +#define MCAP_MD_ABORT_MDL_REQ 0x05 +#define MCAP_MD_ABORT_MDL_RSP 0x06 +#define MCAP_MD_DELETE_MDL_REQ 0x07 +#define MCAP_MD_DELETE_MDL_RSP 0x08 + +/* MCAP Clock Sync Op Codes */ +#define MCAP_MD_SYNC_CAP_REQ 0x11 +#define MCAP_MD_SYNC_CAP_RSP 0x12 +#define MCAP_MD_SYNC_SET_REQ 0x13 +#define MCAP_MD_SYNC_SET_RSP 0x14 +#define MCAP_MD_SYNC_INFO_IND 0x15 + +/* MCAP Response codes */ +#define MCAP_SUCCESS 0x00 +#define MCAP_INVALID_OP_CODE 0x01 +#define MCAP_INVALID_PARAM_VALUE 0x02 +#define MCAP_INVALID_MDEP 0x03 +#define MCAP_MDEP_BUSY 0x04 +#define MCAP_INVALID_MDL 0x05 +#define MCAP_MDL_BUSY 0x06 +#define MCAP_INVALID_OPERATION 0x07 +#define MCAP_RESOURCE_UNAVAILABLE 0x08 +#define MCAP_UNSPECIFIED_ERROR 0x09 +#define MCAP_REQUEST_NOT_SUPPORTED 0x0A +#define MCAP_CONFIGURATION_REJECTED 0x0B + +/* MDL IDs */ +#define MCAP_MDLID_RESERVED 0x0000 +#define MCAP_MDLID_INITIAL 0x0001 +#define MCAP_MDLID_FINAL 0xFEFF +#define MCAP_ALL_MDLIDS 0xFFFF + +/* MDEP IDs */ +#define MCAP_MDEPID_INITIAL 0x00 +#define MCAP_MDEPID_FINAL 0x7F + +/* CSP special values */ +#define MCAP_BTCLOCK_IMMEDIATE 0xffffffffUL +#define MCAP_TMSTAMP_DONTSET 0xffffffffffffffffULL +#define MCAP_BTCLOCK_MAX 0x0fffffff +#define MCAP_BTCLOCK_FIELD (MCAP_BTCLOCK_MAX + 1) + +#define MCAP_CTRL_CACHED 0x01 /* MCL is cached */ +#define MCAP_CTRL_STD_OP 0x02 /* Support for standard op codes */ +#define MCAP_CTRL_SYNC_OP 0x04 /* Support for synchronization commands */ +#define MCAP_CTRL_CONN 0x08 /* MCL is in connecting process */ +#define MCAP_CTRL_FREE 0x10 /* MCL is marked as releasable */ +#define MCAP_CTRL_NOCACHE 0x20 /* MCL is marked as not cacheable */ + +/* + * MCAP Request Packet Format + */ + +typedef struct { + uint8_t op; + uint16_t mdl; + uint8_t mdep; + uint8_t conf; +} __attribute__ ((packed)) mcap_md_create_mdl_req; + +typedef struct { + uint8_t op; + uint16_t mdl; +} __attribute__ ((packed)) mcap_md_req; + +/* + * MCAP Response Packet Format + */ + +typedef struct { + uint8_t op; + uint8_t rc; + uint16_t mdl; + uint8_t data[0]; +} __attribute__ ((packed)) mcap_rsp; + +/* + * MCAP Clock Synchronization Protocol + */ + +typedef struct { + uint8_t op; + uint16_t timest; +} __attribute__ ((packed)) mcap_md_sync_cap_req; + +typedef struct { + uint8_t op; + uint8_t rc; +} __attribute__ ((packed)) mcap_md_sync_rsp; + +typedef struct { + uint8_t op; + uint8_t rc; + uint8_t btclock; + uint16_t sltime; + uint16_t timestnr; + uint16_t timestna; +} __attribute__ ((packed)) mcap_md_sync_cap_rsp; + +typedef struct { + uint8_t op; + uint8_t timestui; + uint32_t btclock; + uint64_t timestst; +} __attribute__ ((packed)) mcap_md_sync_set_req; + +typedef struct { + int8_t op; + uint8_t rc; + uint32_t btclock; + uint64_t timestst; + uint16_t timestsa; +} __attribute__ ((packed)) mcap_md_sync_set_rsp; + +typedef struct { + uint8_t op; + uint32_t btclock; + uint64_t timestst; + uint16_t timestsa; +} __attribute__ ((packed)) mcap_md_sync_info_ind; + +typedef enum { +/* MCAP Error Response Codes */ + MCAP_ERROR_INVALID_OP_CODE = 1, + MCAP_ERROR_INVALID_PARAM_VALUE, + MCAP_ERROR_INVALID_MDEP, + MCAP_ERROR_MDEP_BUSY, + MCAP_ERROR_INVALID_MDL, + MCAP_ERROR_MDL_BUSY, + MCAP_ERROR_INVALID_OPERATION, + MCAP_ERROR_RESOURCE_UNAVAILABLE, + MCAP_ERROR_UNSPECIFIED_ERROR, + MCAP_ERROR_REQUEST_NOT_SUPPORTED, + MCAP_ERROR_CONFIGURATION_REJECTED, +/* MCAP Internal Errors */ + MCAP_ERROR_INVALID_ARGS, + MCAP_ERROR_ALREADY_EXISTS, + MCAP_ERROR_REQ_IGNORED, + MCAP_ERROR_MCL_CLOSED, + MCAP_ERROR_FAILED +} McapError; + +typedef enum { + MCAP_MDL_CB_INVALID, + MCAP_MDL_CB_CONNECTED, /* mcap_mdl_event_cb */ + MCAP_MDL_CB_CLOSED, /* mcap_mdl_event_cb */ + MCAP_MDL_CB_DELETED, /* mcap_mdl_event_cb */ + MCAP_MDL_CB_ABORTED, /* mcap_mdl_event_cb */ + MCAP_MDL_CB_REMOTE_CONN_REQ, /* mcap_remote_mdl_conn_req_cb */ + MCAP_MDL_CB_REMOTE_RECONN_REQ /* mcap_remote_mdl_reconn_req_cb */ +} McapMclCb; + +typedef enum { + MCL_CONNECTED, + MCL_PENDING, + MCL_ACTIVE, + MCL_IDLE +} MCLState; + +typedef enum { + MCL_ACCEPTOR, + MCL_INITIATOR +} MCLRole; + +typedef enum { + MCL_AVAILABLE, + MCL_WAITING_RSP +} MCAPCtrl; + +typedef enum { + MDL_WAITING, + MDL_CONNECTED, + MDL_DELETING, + MDL_CLOSED +} MDLState; + +struct mcap_csp; +struct mcap_mdl_op_cb; +struct mcap_instance; +struct mcap_mcl; +struct mcap_mdl; +struct sync_info_ind_data; + +/************ Callbacks ************/ + +/* MDL callbacks */ + +typedef void (* mcap_mdl_event_cb) (struct mcap_mdl *mdl, gpointer data); +typedef void (* mcap_mdl_operation_conf_cb) (struct mcap_mdl *mdl, uint8_t conf, + GError *err, gpointer data); +typedef void (* mcap_mdl_operation_cb) (struct mcap_mdl *mdl, GError *err, + gpointer data); +typedef void (* mcap_mdl_notify_cb) (GError *err, gpointer data); + +/* Next function should return an MCAP appropriate response code */ +typedef uint8_t (* mcap_remote_mdl_conn_req_cb) (struct mcap_mcl *mcl, + uint8_t mdepid, uint16_t mdlid, + uint8_t *conf, gpointer data); +typedef uint8_t (* mcap_remote_mdl_reconn_req_cb) (struct mcap_mdl *mdl, + gpointer data); + +/* MCL callbacks */ + +typedef void (* mcap_mcl_event_cb) (struct mcap_mcl *mcl, gpointer data); +typedef void (* mcap_mcl_connect_cb) (struct mcap_mcl *mcl, GError *err, + gpointer data); + +/* CSP callbacks */ + +typedef void (* mcap_info_ind_event_cb) (struct mcap_mcl *mcl, + struct sync_info_ind_data *data); + +typedef void (* mcap_sync_cap_cb) (struct mcap_mcl *mcl, + uint8_t mcap_err, + uint8_t btclockres, + uint16_t synclead, + uint16_t tmstampres, + uint16_t tmstampacc, + GError *err, + gpointer data); + +typedef void (* mcap_sync_set_cb) (struct mcap_mcl *mcl, + uint8_t mcap_err, + uint32_t btclock, + uint64_t timestamp, + uint16_t accuracy, + GError *err, + gpointer data); + +struct mcap_mdl_cb { + mcap_mdl_event_cb mdl_connected; /* Remote device has created a MDL */ + mcap_mdl_event_cb mdl_closed; /* Remote device has closed a MDL */ + mcap_mdl_event_cb mdl_deleted; /* Remote device requested deleting a MDL */ + mcap_mdl_event_cb mdl_aborted; /* Remote device aborted the mdl creation */ + mcap_remote_mdl_conn_req_cb mdl_conn_req; /* Remote device requested creating a MDL */ + mcap_remote_mdl_reconn_req_cb mdl_reconn_req; /* Remote device requested reconnecting a MDL */ + gpointer user_data; /* User data */ +}; + +struct mcap_instance { + bdaddr_t src; /* Source address */ + GIOChannel *ccio; /* Control Channel IO */ + GIOChannel *dcio; /* Data Channel IO */ + GSList *mcls; /* MCAP instance list */ + GSList *cached; /* List with all cached MCLs (MAX_CACHED macro) */ + BtIOSecLevel sec; /* Security level */ + mcap_mcl_event_cb mcl_connected_cb; /* New MCL connected */ + mcap_mcl_event_cb mcl_reconnected_cb; /* Old MCL has been reconnected */ + mcap_mcl_event_cb mcl_disconnected_cb; /* MCL disconnected */ + mcap_mcl_event_cb mcl_uncached_cb; /* MCL has been removed from MCAP cache */ + mcap_info_ind_event_cb mcl_sync_infoind_cb; /* (CSP Master) Received info indication */ + gpointer user_data; /* Data to be provided in callbacks */ + int ref; /* Reference counter */ + + gboolean csp_enabled; /* CSP: functionality enabled */ +}; + +struct mcap_mcl { + struct mcap_instance *mi; /* MCAP instance where this MCL belongs */ + bdaddr_t addr; /* Device address */ + GIOChannel *cc; /* MCAP Control Channel IO */ + guint wid; /* MCL Watcher id */ + GSList *mdls; /* List of Data Channels shorted by mdlid */ + MCLState state; /* Current MCL State */ + MCLRole role; /* Initiator or acceptor of this MCL */ + MCAPCtrl req; /* Request control flag */ + struct mcap_mdl_op_cb *priv_data; /* Temporal data to manage responses */ + struct mcap_mdl_cb *cb; /* MDL callbacks */ + guint tid; /* Timer id for waiting for a response */ + uint8_t *lcmd; /* Last command sent */ + int ref; /* References counter */ + uint8_t ctrl; /* MCL control flag */ + uint16_t next_mdl; /* id used to create next MDL */ + struct mcap_csp *csp; /* CSP control structure */ +}; + +struct mcap_mdl { + struct mcap_mcl *mcl; /* MCL where this MDL belongs */ + GIOChannel *dc; /* MCAP Data Channel IO */ + guint wid; /* MDL Watcher id */ + uint16_t mdlid; /* MDL id */ + uint8_t mdep_id; /* MCAP Data End Point */ + MDLState state; /* MDL state */ + int ref; /* References counter */ +}; + +struct sync_info_ind_data { + uint32_t btclock; + uint64_t timestamp; + uint16_t accuracy; +}; + +/************ Operations ************/ + +/* MDL operations */ + +gboolean mcap_create_mdl(struct mcap_mcl *mcl, + uint8_t mdepid, + uint8_t conf, + mcap_mdl_operation_conf_cb connect_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err); +gboolean mcap_reconnect_mdl(struct mcap_mdl *mdl, + mcap_mdl_operation_cb reconnect_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err); +gboolean mcap_delete_all_mdls(struct mcap_mcl *mcl, + mcap_mdl_notify_cb delete_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err); +gboolean mcap_delete_mdl(struct mcap_mdl *mdl, + mcap_mdl_notify_cb delete_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err); +gboolean mcap_connect_mdl(struct mcap_mdl *mdl, + uint8_t mode, + uint16_t dcpsm, + mcap_mdl_operation_cb connect_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err); +gboolean mcap_mdl_abort(struct mcap_mdl *mdl, + mcap_mdl_notify_cb abort_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err); + +int mcap_mdl_get_fd(struct mcap_mdl *mdl); +uint16_t mcap_mdl_get_mdlid(struct mcap_mdl *mdl); +struct mcap_mdl *mcap_mdl_ref(struct mcap_mdl *mdl); +void mcap_mdl_unref(struct mcap_mdl *mdl); + +/* MCL operations */ + +gboolean mcap_create_mcl(struct mcap_instance *mi, + const bdaddr_t *addr, + uint16_t ccpsm, + mcap_mcl_connect_cb connect_cb, + gpointer user_data, + GDestroyNotify destroy, + GError **err); +void mcap_close_mcl(struct mcap_mcl *mcl, gboolean cache); +gboolean mcap_mcl_set_cb(struct mcap_mcl *mcl, gpointer user_data, + GError **gerr, McapMclCb cb1, ...); +void mcap_mcl_get_addr(struct mcap_mcl *mcl, bdaddr_t *addr); +struct mcap_mcl *mcap_mcl_ref(struct mcap_mcl *mcl); +void mcap_mcl_unref(struct mcap_mcl *mcl); + +/* CSP operations */ + +void mcap_enable_csp(struct mcap_instance *mi); +void mcap_disable_csp(struct mcap_instance *mi); +uint64_t mcap_get_timestamp(struct mcap_mcl *mcl, + struct timespec *given_time); +uint32_t mcap_get_btclock(struct mcap_mcl *mcl); + +void mcap_sync_cap_req(struct mcap_mcl *mcl, + uint16_t reqacc, + mcap_sync_cap_cb cb, + gpointer user_data, + GError **err); + +void mcap_sync_set_req(struct mcap_mcl *mcl, + uint8_t update, + uint32_t btclock, + uint64_t timestamp, + mcap_sync_set_cb cb, + gpointer user_data, + GError **err); + +/* MCAP main operations */ + +struct mcap_instance *mcap_create_instance(const bdaddr_t *src, + BtIOSecLevel sec, uint16_t ccpsm, + uint16_t dcpsm, + mcap_mcl_event_cb mcl_connected, + mcap_mcl_event_cb mcl_reconnected, + mcap_mcl_event_cb mcl_disconnected, + mcap_mcl_event_cb mcl_uncached, + mcap_info_ind_event_cb mcl_sync_info_ind, + gpointer user_data, + GError **gerr); +void mcap_release_instance(struct mcap_instance *mi); + +struct mcap_instance *mcap_instance_ref(struct mcap_instance *mi); +void mcap_instance_unref(struct mcap_instance *mi); + +uint16_t mcap_get_ctrl_psm(struct mcap_instance *mi, GError **err); +uint16_t mcap_get_data_psm(struct mcap_instance *mi, GError **err); + +gboolean mcap_set_data_chan_mode(struct mcap_instance *mi, uint8_t mode, + GError **err); + +int mcap_send_data(int sock, const void *buf, uint32_t size); + +void proc_sync_cmd(struct mcap_mcl *mcl, uint8_t *cmd, uint32_t len); +void mcap_sync_init(struct mcap_mcl *mcl); +void mcap_sync_stop(struct mcap_mcl *mcl); -- 1.8.3.2