diff options
Diffstat (limited to 'health/mcap_sync.c')
| -rw-r--r-- | health/mcap_sync.c | 1015 |
1 files changed, 1015 insertions, 0 deletions
diff --git a/health/mcap_sync.c b/health/mcap_sync.c new file mode 100644 index 0000000..f4b005a --- /dev/null +++ b/health/mcap_sync.c @@ -0,0 +1,1015 @@ +/* + * + * MCAP for BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2010 GSyC/LibreSoft, Universidad Rey Juan Carlos. + * Copyright (C) 2010 Signove + * + * Authors: + * Santiago Carot-Nemesio <sancane at gmail.com> + * Jose Antonio Santos-Cadenas <santoscadenas at gmail.com> + * Elvis Pfützenreuter <epx at signove.com> + * + * 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 + * + */ + +#include "btio.h" +#include <stdint.h> +#include <netinet/in.h> +#include <time.h> +#include <stdlib.h> +#include <bluetooth/bluetooth.h> +#include <bluetooth/l2cap.h> +#include "../src/adapter.h" +#include "../src/manager.h" +#include <sys/ioctl.h> + +#include "config.h" +#include "log.h" + +#include <bluetooth/bluetooth.h> +#include "mcap.h" +#include "mcap_lib.h" +#include "mcap_internal.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 + +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 */ + MCAPCtrl 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; +}; + +#define hton64(x) ntoh64(x) + +static gboolean csp_caps_initialized = FALSE; +struct csp_caps _caps; + +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 = manager_find_adapter(&mcl->mi->src); + + if (!adapter) + return FALSE; + + if (btd_adapter_read_clock(adapter, &mcl->addr, which, 1000, + btclock, btaccuracy) < 0) + return FALSE; + + return TRUE; +} + +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; + + 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; + + 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); + + 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; +} |