Introduce unicast service.
This patch adds new code that handles unicast service contracts, sending messages according the negotiated schedule. Signed-off-by: Richard Cochran <richardcochran@gmail.com>master
Richard Cochran
parent
dfa9e65785
commit
63598688b7
2
makefile
2
makefile
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@ -27,7 +27,7 @@ OBJ = bmc.o clock.o clockadj.o clockcheck.o config.o e2e_tc.o fault.o \
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filter.o fsm.o hash.o linreg.o mave.o mmedian.o msg.o ntpshm.o nullf.o phc.o \
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pi.o port.o port_signaling.o pqueue.o print.o ptp4l.o p2p_tc.o raw.o rtnl.o \
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servo.o sk.o stats.o tc.o telecom.o tlv.o transport.o tsproc.o udp.o udp6.o \
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uds.o unicast_client.o unicast_fsm.o util.o version.o
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uds.o unicast_client.o unicast_fsm.o unicast_service.o util.o version.o
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OBJECTS = $(OBJ) hwstamp_ctl.o nsm.o phc2sys.o phc_ctl.o pmc.o pmc_common.o \
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sysoff.o timemaster.o
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@ -127,6 +127,8 @@ enum {
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#else
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#define TFD_TIMER_ABSTIME (1 << 0)
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static inline int clock_nanosleep(clockid_t clock_id, int flags,
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const struct timespec *request,
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struct timespec *remain)
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@ -135,6 +135,8 @@ struct port {
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TAILQ_HEAD(tct, tc_txd) tc_transmitted;
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/* unicast client mode */
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struct unicast_master_table *unicast_master_table;
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/* unicast service mode */
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struct unicast_service *unicast_service;
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};
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#define portnum(p) (p->portIdentity.portNumber)
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@ -0,0 +1,527 @@
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/**
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* @file unicast_service.c
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* @brief Unicast service
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* @note Copyright (C) 2018 Richard Cochran <richardcochran@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA.
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*/
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#include <stdlib.h>
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#include <sys/queue.h>
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#include <time.h>
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#include "address.h"
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#include "clock.h"
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#include "missing.h"
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#include "port.h"
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#include "port_private.h"
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#include "pqueue.h"
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#include "print.h"
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#include "unicast_service.h"
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#include "util.h"
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#define QUEUE_LEN 16
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struct unicast_client_address {
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LIST_ENTRY(unicast_client_address) list;
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struct PortIdentity portIdentity;
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unsigned int message_types;
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struct address addr;
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time_t grant_tmo;
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};
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struct unicast_service_interval {
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LIST_HEAD(uca, unicast_client_address) clients;
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LIST_ENTRY(unicast_service_interval) list;
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struct timespec incr;
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struct timespec tmo;
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int log_period;
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};
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struct unicast_service {
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LIST_HEAD(usi, unicast_service_interval) intervals;
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struct pqueue *queue;
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};
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static struct timespec log_to_timespec(int log_seconds);
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static int timespec_compare(struct timespec *a, struct timespec *b);
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static void timespec_normalize(struct timespec *ts);
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static int attach_grant(struct ptp_message *msg,
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struct request_unicast_xmit_tlv *req,
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int duration)
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{
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struct grant_unicast_xmit_tlv *g;
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struct tlv_extra *extra;
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extra = msg_tlv_append(msg, sizeof(*g));
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if (!extra) {
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return -1;
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}
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g = (struct grant_unicast_xmit_tlv *) extra->tlv;
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g->type = TLV_GRANT_UNICAST_TRANSMISSION;
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g->length = sizeof(*g) - sizeof(g->type) - sizeof(g->length);
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g->message_type = req->message_type;
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g->logInterMessagePeriod = req->logInterMessagePeriod;
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g->durationField = duration;
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g->flags = GRANT_UNICAST_RENEWAL_INVITED;
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return 0;
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}
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static int compare_timeout(void *ain, void *bin)
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{
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struct unicast_service_interval *a, *b;
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a = (struct unicast_service_interval *) ain;
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b = (struct unicast_service_interval *) bin;
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return timespec_compare(&a->tmo, &b->tmo);
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}
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static void initialize_interval(struct unicast_service_interval *interval,
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int log_period)
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{
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LIST_INIT(&interval->clients);
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interval->incr = log_to_timespec(log_period);
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clock_gettime(CLOCK_MONOTONIC, &interval->tmo);
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interval->tmo.tv_nsec += 10000000;
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timespec_normalize(&interval->tmo);
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interval->log_period = log_period;
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}
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static void interval_increment(struct unicast_service_interval *i)
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{
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i->tmo.tv_sec += i->incr.tv_sec;
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i->tmo.tv_nsec += i->incr.tv_nsec;
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timespec_normalize(&i->tmo);
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}
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static struct timespec log_to_timespec(int log_seconds)
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{
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struct timespec ts = {0, 0};
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uint64_t ns;
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int i;
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if (log_seconds < 0) {
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log_seconds *= -1;
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for (i = 1, ns = 500000000ULL; i < log_seconds; i++) {
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ns >>= 1;
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}
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ts.tv_nsec = ns;
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} else {
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ts.tv_sec = 1 << log_seconds;
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}
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return ts;
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}
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/*
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* Returns:
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* 1 if 'a' is before 'b'
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* -1 if 'a' is after 'b'
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* 0 otherwise
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*/
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static int timespec_compare(struct timespec *a, struct timespec *b)
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{
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if (a->tv_sec < b->tv_sec) {
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return 1;
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}
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if (b->tv_sec < a->tv_sec) {
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return -1;
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}
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if (a->tv_nsec < b->tv_nsec) {
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return 1;
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}
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if (b->tv_nsec < a->tv_nsec) {
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return -1;
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}
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return 0;
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}
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static void timespec_normalize(struct timespec *ts)
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{
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while (ts->tv_nsec >= NS_PER_SEC) {
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ts->tv_nsec -= NS_PER_SEC;
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ts->tv_sec++;
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}
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}
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static int unicast_service_clients(struct port *p,
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struct unicast_service_interval *interval)
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{
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struct unicast_client_address *client, *next;
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struct timespec now;
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int err = 0;
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err = clock_gettime(CLOCK_MONOTONIC, &now);
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if (err) {
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pr_err("clock_gettime failed: %m");
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return err;
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}
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LIST_FOREACH_SAFE(client, &interval->clients, list, next) {
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pr_debug("%s wants 0x%x", pid2str(&client->portIdentity),
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client->message_types);
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if (now.tv_sec > client->grant_tmo) {
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pr_debug("%s service of 0x%x expired",
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pid2str(&client->portIdentity),
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client->message_types);
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LIST_REMOVE(client, list);
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free(client);
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continue;
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}
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if (client->message_types & (1 << ANNOUNCE)) {
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if (port_tx_announce(p, &client->addr)) {
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err = -1;
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}
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}
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if (client->message_types & (1 << SYNC)) {
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if (port_tx_sync(p, &client->addr)) {
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err = -1;
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}
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}
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}
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return err;
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}
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static void unicast_service_extend(struct unicast_client_address *client,
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struct request_unicast_xmit_tlv *req)
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{
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struct timespec now;
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time_t tmo;
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int err;
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err = clock_gettime(CLOCK_MONOTONIC, &now);
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if (err) {
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pr_err("clock_gettime failed: %m");
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return;
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}
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tmo = now.tv_sec + req->durationField;
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if (tmo > client->grant_tmo) {
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client->grant_tmo = tmo;
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pr_debug("%s grant of 0x%x extended to %ld",
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pid2str(&client->portIdentity),
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client->message_types, tmo);
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}
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}
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static int unicast_service_rearm_timer(struct port *p)
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{
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struct unicast_service_interval *interval;
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struct itimerspec tmo;
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int fd;
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fd = p->fda.fd[FD_UNICAST_SRV_TIMER];
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memset(&tmo, 0, sizeof(tmo));
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interval = pqueue_peek(p->unicast_service->queue);
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if (interval) {
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tmo.it_value = interval->tmo;
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pr_debug("arming timer tmo={%ld,%ld}",
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interval->tmo.tv_sec, interval->tmo.tv_nsec);
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} else {
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pr_debug("stopping unicast service timer");
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}
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return timerfd_settime(fd, TFD_TIMER_ABSTIME, &tmo, NULL);
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}
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static int unicast_service_reply(struct port *p, struct ptp_message *dst,
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struct request_unicast_xmit_tlv *req,
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int duration)
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{
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struct ptp_message *msg;
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int err;
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msg = port_signaling_construct(p, &dst->address,
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&dst->header.sourcePortIdentity);
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if (!msg) {
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return -1;
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}
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err = attach_grant(msg, req, duration);
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if (err) {
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goto out;
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}
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err = port_prepare_and_send(p, msg, TRANS_GENERAL);
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if (err) {
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pr_err("port %hu: signaling message failed", portnum(p));
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}
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out:
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msg_put(msg);
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return err;
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}
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/* public methods */
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int unicast_service_add(struct port *p, struct ptp_message *m,
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struct tlv_extra *extra)
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{
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struct unicast_client_address *client = NULL, *ctmp, *next;
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struct unicast_service_interval *interval = NULL, *itmp;
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struct request_unicast_xmit_tlv *req;
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unsigned int mask;
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uint8_t mtype;
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if (!p->unicast_service) {
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return SERVICE_DISABLED;
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}
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req = (struct request_unicast_xmit_tlv *) extra->tlv;
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mtype = req->message_type >> 4;
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mask = 1 << mtype;
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switch (mtype) {
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case ANNOUNCE:
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case SYNC:
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break;
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case DELAY_RESP:
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case PDELAY_RESP:
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return SERVICE_GRANTED;
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default:
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return SERVICE_DENIED;
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}
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LIST_FOREACH(itmp, &p->unicast_service->intervals, list) {
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/*
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* Remember the interval of interest.
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*/
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if (itmp->log_period == req->logInterMessagePeriod) {
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interval = itmp;
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}
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/*
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* Find any client records, and remove any stale contract.
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*/
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LIST_FOREACH_SAFE(ctmp, &itmp->clients, list, next) {
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if (!addreq(transport_type(p->trp),
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&ctmp->addr, &m->address)) {
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continue;
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}
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if (interval == itmp) {
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if (ctmp->message_types & mask) {
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/* Contract is unchanged. */
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unicast_service_extend(ctmp, req);
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return SERVICE_GRANTED;
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}
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/* This is the one to use. */
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client = ctmp;
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continue;
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}
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/* Clear any stale contracts. */
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ctmp->message_types &= ~mask;
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if (!ctmp->message_types) {
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LIST_REMOVE(ctmp, list);
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free(ctmp);
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}
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}
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}
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if (client) {
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client->message_types |= mask;
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unicast_service_extend(client, req);
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return SERVICE_GRANTED;
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}
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client = calloc(1, sizeof(*client));
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if (!client) {
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return SERVICE_DENIED;
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}
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client->portIdentity = m->header.sourcePortIdentity;
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client->message_types = mask;
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client->addr = m->address;
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unicast_service_extend(client, req);
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if (!interval) {
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interval = calloc(1, sizeof(*interval));
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if (!interval) {
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free(client);
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return SERVICE_DENIED;
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}
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initialize_interval(interval, req->logInterMessagePeriod);
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LIST_INSERT_HEAD(&p->unicast_service->intervals, interval, list);
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if (pqueue_insert(p->unicast_service->queue, interval)) {
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LIST_REMOVE(interval, list);
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free(interval);
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free(client);
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return SERVICE_DENIED;
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}
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unicast_service_rearm_timer(p);
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}
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LIST_INSERT_HEAD(&interval->clients, client, list);
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return SERVICE_GRANTED;
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}
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void unicast_service_cleanup(struct port *p)
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{
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struct unicast_service_interval *itmp, *inext;
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struct unicast_client_address *ctmp, *cnext;
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if (!p->unicast_service) {
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return;
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}
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LIST_FOREACH_SAFE(itmp, &p->unicast_service->intervals, list, inext) {
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LIST_FOREACH_SAFE(ctmp, &itmp->clients, list, cnext) {
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LIST_REMOVE(ctmp, list);
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free(ctmp);
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}
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LIST_REMOVE(itmp, list);
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free(itmp);
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}
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pqueue_destroy(p->unicast_service->queue);
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free(p->unicast_service);
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}
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int unicast_service_deny(struct port *p, struct ptp_message *m,
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struct tlv_extra *extra)
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{
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struct request_unicast_xmit_tlv *req =
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(struct request_unicast_xmit_tlv *) extra->tlv;
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return unicast_service_reply(p, m, req, 0);
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}
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int unicast_service_grant(struct port *p, struct ptp_message *m,
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struct tlv_extra *extra)
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{
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struct request_unicast_xmit_tlv *req =
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(struct request_unicast_xmit_tlv *) extra->tlv;
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return unicast_service_reply(p, m, req, req->durationField);
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}
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int unicast_service_initialize(struct port *p)
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{
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struct config *cfg = clock_config(p->clock);
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if (!config_get_int(cfg, p->name, "unicast_listen")) {
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return 0;
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}
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p->unicast_service = calloc(1, sizeof(*p->unicast_service));
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if (!p->unicast_service) {
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return -1;
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}
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LIST_INIT(&p->unicast_service->intervals);
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p->unicast_service->queue = pqueue_create(QUEUE_LEN, compare_timeout);
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if (!p->unicast_service->queue) {
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free(p->unicast_service);
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return -1;
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}
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return 0;
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}
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void unicast_service_remove(struct port *p, struct ptp_message *m,
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struct tlv_extra *extra)
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{
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struct unicast_client_address *ctmp, *next;
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struct cancel_unicast_xmit_tlv *cancel;
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struct unicast_service_interval *itmp;
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unsigned int mask;
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uint8_t mtype;
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if (!p->unicast_service) {
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return;
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}
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cancel = (struct cancel_unicast_xmit_tlv *) extra->tlv;
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if (cancel->message_type_flags & CANCEL_UNICAST_MAINTAIN_REQUEST) {
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return;
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}
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mtype = cancel->message_type_flags >> 4;
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mask = 1 << mtype;
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switch (mtype) {
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case ANNOUNCE:
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case SYNC:
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break;
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case DELAY_RESP:
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case PDELAY_RESP:
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default:
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return;
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}
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|
||||
LIST_FOREACH(itmp, &p->unicast_service->intervals, list) {
|
||||
LIST_FOREACH_SAFE(ctmp, &itmp->clients, list, next) {
|
||||
if (!addreq(transport_type(p->trp),
|
||||
&ctmp->addr, &m->address)) {
|
||||
continue;
|
||||
}
|
||||
if (ctmp->message_types & mask) {
|
||||
ctmp->message_types &= ~mask;
|
||||
if (!ctmp->message_types) {
|
||||
LIST_REMOVE(ctmp, list);
|
||||
free(ctmp);
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int unicast_service_timer(struct port *p)
|
||||
{
|
||||
struct unicast_service_interval *interval;
|
||||
int err = 0, master = 0;
|
||||
struct timespec now;
|
||||
|
||||
if (!p->unicast_service) {
|
||||
return 0;
|
||||
}
|
||||
clock_gettime(CLOCK_MONOTONIC, &now);
|
||||
|
||||
switch (p->state) {
|
||||
case PS_INITIALIZING:
|
||||
case PS_FAULTY:
|
||||
case PS_DISABLED:
|
||||
case PS_LISTENING:
|
||||
case PS_PRE_MASTER:
|
||||
case PS_PASSIVE:
|
||||
case PS_UNCALIBRATED:
|
||||
case PS_SLAVE:
|
||||
break;
|
||||
case PS_MASTER:
|
||||
case PS_GRAND_MASTER:
|
||||
master = 1;
|
||||
break;
|
||||
}
|
||||
|
||||
while ((interval = pqueue_peek(p->unicast_service->queue)) != NULL) {
|
||||
|
||||
pr_debug("peek i={2^%d} tmo={%ld,%ld}", interval->log_period,
|
||||
interval->tmo.tv_sec, interval->tmo.tv_nsec);
|
||||
|
||||
if (timespec_compare(&now, &interval->tmo) >= 0) {
|
||||
break;
|
||||
}
|
||||
interval = pqueue_extract(p->unicast_service->queue);
|
||||
|
||||
if (master && unicast_service_clients(p, interval)) {
|
||||
err = -1;
|
||||
}
|
||||
|
||||
if (LIST_EMPTY(&interval->clients)) {
|
||||
pr_debug("retire interval 2^%d", interval->log_period);
|
||||
LIST_REMOVE(interval, list);
|
||||
free(interval);
|
||||
continue;
|
||||
}
|
||||
|
||||
interval_increment(interval);
|
||||
pr_debug("next i={2^%d} tmo={%ld,%ld}", interval->log_period,
|
||||
interval->tmo.tv_sec, interval->tmo.tv_nsec);
|
||||
pqueue_insert(p->unicast_service->queue, interval);
|
||||
}
|
||||
|
||||
if (unicast_service_rearm_timer(p)) {
|
||||
err = -1;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
|
@ -0,0 +1,90 @@
|
|||
/**
|
||||
* @file unicast_service.h
|
||||
* @brief Unicast service
|
||||
* @note Copyright (C) 2018 Richard Cochran <richardcochran@gmail.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 Street, Fifth Floor, Boston, MA 02110-1335 USA.
|
||||
*/
|
||||
#ifndef HAVE_UNICAST_SERVICE_H
|
||||
#define HAVE_UNICAST_SERVICE_H
|
||||
|
||||
struct port;
|
||||
struct ptp_message;
|
||||
struct tlv_extra;
|
||||
|
||||
#define SERVICE_GRANTED 0
|
||||
#define SERVICE_DENIED 1
|
||||
#define SERVICE_DISABLED 2
|
||||
|
||||
/**
|
||||
* Handle a request for unicast service.
|
||||
* @param p The port on which the signaling message was received.
|
||||
* @param m The signaling message containing the request.
|
||||
* @param extra The TLV containing the request.
|
||||
* @return SERVICE_GRANTED, SERVICE_DENIED, or SERVICE_DISABLED.
|
||||
*/
|
||||
int unicast_service_add(struct port *p, struct ptp_message *m,
|
||||
struct tlv_extra *extra);
|
||||
|
||||
/**
|
||||
* Frees all of the resources associated with a port's unicast service.
|
||||
* @param p The port in question.
|
||||
*/
|
||||
void unicast_service_cleanup(struct port *p);
|
||||
|
||||
/**
|
||||
* Responds to a unicast service request with a denial.
|
||||
* @param p The port on which the signaling message was received.
|
||||
* @param m The signaling message containing the request.
|
||||
* @param extra The TLV containing the request.
|
||||
* @return Zero on success, non-zero otherwise.
|
||||
*/
|
||||
int unicast_service_deny(struct port *p, struct ptp_message *m,
|
||||
struct tlv_extra *extra);
|
||||
|
||||
/**
|
||||
* Responds to a unicast service request with a grant.
|
||||
* @param p The port on which the signaling message was received.
|
||||
* @param m The signaling message containing the request.
|
||||
* @param extra The TLV containing the request.
|
||||
* @return Zero on success, non-zero otherwise.
|
||||
*/
|
||||
int unicast_service_grant(struct port *p, struct ptp_message *m,
|
||||
struct tlv_extra *extra);
|
||||
|
||||
/**
|
||||
* Initializes unicast service on a given port.
|
||||
* @param p The port in question.
|
||||
* @return Zero on success, non-zero otherwise.
|
||||
*/
|
||||
int unicast_service_initialize(struct port *p);
|
||||
|
||||
/**
|
||||
* Handle a unicast service cancellation.
|
||||
* @param p The port on which the signaling message was received.
|
||||
* @param m The signaling message containing the cancellation.
|
||||
* @param extra The TLV containing the cancellation.
|
||||
*/
|
||||
void unicast_service_remove(struct port *p, struct ptp_message *m,
|
||||
struct tlv_extra *extra);
|
||||
|
||||
/**
|
||||
* Handles the unicast service timer, sending messages according to schedule.
|
||||
* @param p The port in question.
|
||||
* @return Zero on success, non-zero otherwise.
|
||||
*/
|
||||
int unicast_service_timer(struct port *p);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue