Introduce transport over UNIX domain sockets.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>master
parent
97df9b66b2
commit
18cac67b33
4
makefile
4
makefile
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@ -24,7 +24,7 @@ CFLAGS = -Wall $(INC) $(DEBUG) $(EXTRA_CFLAGS)
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LDLIBS = -lm -lrt $(EXTRA_LDFLAGS)
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PRG = ptp4l pmc phc2sys hwstamp_ctl
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OBJ = bmc.o clock.o config.o fsm.o ptp4l.o mave.o msg.o phc.o pi.o port.o \
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print.o raw.o servo.o sk.o tlv.o tmtab.o transport.o udp.o udp6.o util.o
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print.o raw.o servo.o sk.o tlv.o tmtab.o transport.o udp.o udp6.o uds.o util.o
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OBJECTS = $(OBJ) pmc.o phc2sys.o hwstamp_ctl.o
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SRC = $(OBJECTS:.o=.c)
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@ -36,7 +36,7 @@ all: $(PRG)
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ptp4l: $(OBJ)
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pmc: pmc.o msg.o print.o raw.o sk.o tlv.o transport.o udp.o udp6.o util.o
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pmc: pmc.o msg.o print.o raw.o sk.o tlv.o transport.o udp.o udp6.o uds.o util.o
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phc2sys: phc2sys.o
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@ -22,6 +22,7 @@
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#include "raw.h"
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#include "udp.h"
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#include "udp6.h"
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#include "uds.h"
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int transport_close(struct transport *t, struct fdarray *fda)
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{
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@ -65,6 +66,8 @@ struct transport *transport_create(enum transport_type type)
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case TRANS_CONTROLNET:
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case TRANS_PROFINET:
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break;
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case TRANS_UDS:
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return uds_transport_create();
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}
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return NULL;
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}
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@ -31,6 +31,7 @@ enum transport_type {
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TRANS_DEVICENET,
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TRANS_CONTROLNET,
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TRANS_PROFINET,
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TRANS_UDS,
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};
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enum timestamp_type {
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@ -0,0 +1,129 @@
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/**
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* @file uds.c
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* @note Copyright (C) 2012 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 02110-1301 USA.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include "contain.h"
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#include "print.h"
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#include "transport_private.h"
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#include "uds.h"
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#define UDS_FILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) /*0660*/
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struct uds {
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struct transport t;
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struct sockaddr_un sa;
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socklen_t len;
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};
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static int uds_close(struct transport *t, struct fdarray *fda)
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{
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close(fda->fd[FD_GENERAL]);
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return 0;
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}
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static int uds_open(struct transport *t, char *name, struct fdarray *fda,
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enum timestamp_type tt)
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{
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int fd, err;
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struct sockaddr_un sa;
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struct uds *uds = container_of(t, struct uds, t);
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fd = socket(AF_LOCAL, SOCK_DGRAM, 0);
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if (fd < 0) {
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pr_err("uds: failed to create socket: %m");
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return -1;
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}
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memset(&sa, 0, sizeof(sa));
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sa.sun_family = AF_LOCAL;
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strcpy(sa.sun_path, name);
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unlink(name);
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err = bind(fd, (struct sockaddr *) &sa, sizeof(sa));
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if (err < 0) {
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pr_err("uds: bind failed: %m");
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close(fd);
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return -1;
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}
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/* For client use, pre load the server path. */
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memset(&sa, 0, sizeof(sa));
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sa.sun_family = AF_LOCAL;
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strcpy(sa.sun_path, UDS_PATH);
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uds->sa = sa;
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uds->len = sizeof(sa);
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chmod(name, UDS_FILEMODE);
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fda->fd[FD_GENERAL] = fd;
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return 0;
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}
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static int uds_recv(struct transport *t, int fd, void *buf, int buflen,
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struct hw_timestamp *hwts)
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{
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int cnt;
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struct uds *uds = container_of(t, struct uds, t);
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socklen_t *len = &uds->len;
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uds->len = sizeof(uds->sa);
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cnt = recvfrom(fd, buf, buflen, 0, (struct sockaddr *) &uds->sa, len);
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if (cnt <= 0) {
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pr_err("uds: recvfrom failed: %m");
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}
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return cnt;
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}
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static int uds_send(struct transport *t, struct fdarray *fda, int event,
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int peer, void *buf, int buflen, struct hw_timestamp *hwts)
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{
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int cnt, fd = fda->fd[FD_GENERAL];
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struct uds *uds = container_of(t, struct uds, t);
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cnt = sendto(fd, buf, buflen, 0, (struct sockaddr *) &uds->sa, uds->len);
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if (cnt <= 0) {
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pr_err("uds: sendto failed: %m");
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}
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return cnt;
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}
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static void uds_release(struct transport *t)
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{
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struct uds *uds = container_of(t, struct uds, t);
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free(uds);
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}
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struct transport *uds_transport_create(void)
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{
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struct uds *uds;
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uds = calloc(1, sizeof(*uds));
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if (!uds)
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return NULL;
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uds->t.close = uds_close;
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uds->t.open = uds_open;
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uds->t.recv = uds_recv;
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uds->t.send = uds_send;
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uds->t.release = uds_release;
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return &uds->t;
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}
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@ -0,0 +1,37 @@
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/**
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* @file uds.h
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* @brief Implements a management interface via UNIX domain sockets.
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* @note Copyright (C) 2012 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 02110-1301 USA.
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*/
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#ifndef HAVE_UDS_H
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#define HAVE_UDS_H
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#include "fd.h"
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#include "transport.h"
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/**
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* Address of the server.
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*/
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#define UDS_PATH "/tmp/ptp4l"
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/**
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* Allocate an instance of a UDS transport.
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* @return Pointer to a new transport instance on success, NULL otherwise.
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*/
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struct transport *uds_transport_create(void);
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#endif
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