Add transport over UDP IPv4.

Signed-off-by: Richard Cochran <[email protected]>

fd.h

@@ -0,0 +1,36 @@
+/**
+ * @file fd.h
+ * @brief Defines a array of file descriptors, useful for polling.
+ * @note Copyright (C) 2011 Richard Cochran <[email protected]>
+ *
+ * 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 02110-1301 USA.
+ */
+#ifndef HAVE_FD_H
+#define HAVE_FD_H
+
+enum {
+	FD_EVENT,
+	FD_GENERAL,
+	FD_ANNOUNCE_TIMER,
+	FD_DELAY_TIMER,
+	N_POLLFD,
+};
+
+struct fdarray {
+	int fd[N_POLLFD];
+	int cnt;
+};
+
+#endif

makefile

@@ -24,7 +24,7 @@ CFLAGS	= -Wall $(INC) $(DEBUG)
 LDFLAGS	=
 LDLIBS	= -lm -lrt
 PRG	= linuxptp
-OBJ	= bmc.o fsm.o phc.o print.o util.o
+OBJ	= bmc.o fsm.o phc.o print.o transport.o udp.o util.o
 
 SRC	= $(OBJ:.o=.c)
 DEPEND	= $(OBJ:.o=.d)

transport.c

@@ -0,0 +1,43 @@
+/**
+ * @file transport.c
+ * @note Copyright (C) 2011 Richard Cochran <[email protected]>
+ *
+ * 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 02110-1301 USA.
+ */
+
+#include "transport.h"
+#include "udp.h"
+
+static struct transport udp = {
+	.close = udp_close,
+	.open  = udp_open,
+	.recv  = udp_recv,
+	.send  = udp_send,
+};
+
+struct transport *transport_find(enum transport_type type)
+{
+	switch (type) {
+	case TRANS_UDP_IPV4:
+		return &udp;
+	case TRANS_UDP_IPV6:
+	case TRANS_IEEE_802_3:
+	case TRANS_DEVICENET:
+	case TRANS_CONTROLNET:
+	case TRANS_PROFINET:
+		break;
+	}
+	return NULL;
+}

transport.h

@@ -0,0 +1,62 @@
+/**
+ * @file transport.h
+ * @brief Defines an abstract transport layer.
+ * @note Copyright (C) 2011 Richard Cochran <[email protected]>
+ *
+ * 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 02110-1301 USA.
+ */
+#ifndef HAVE_TRANSPORT_H
+#define HAVE_TRANSPORT_H
+
+#include <time.h>
+
+#include "fd.h"
+
+enum transport_type {
+	TRANS_UDP_IPV4,
+	TRANS_UDP_IPV6,
+	TRANS_IEEE_802_3,
+	TRANS_DEVICENET,
+	TRANS_CONTROLNET,
+	TRANS_PROFINET,
+};
+
+enum timestamp_type {
+	TS_SOFTWARE,
+	TS_HARDWARE,
+	TS_LEGACY_HW,
+};
+
+struct hw_timestamp {
+	enum timestamp_type type;
+	struct timespec ts;
+};
+
+struct transport {
+	int (*close)(struct fdarray *fda);
+	int (*open)(char *name, struct fdarray *fda, enum timestamp_type tt);
+	int (*recv)(int fd, void *buf, int buflen, struct hw_timestamp *hwts);
+	int (*send)(struct fdarray *fda, int event,
+		    void *buf, int buflen, struct hw_timestamp *hwts);
+};
+
+/**
+ * Obtain a pointer to the specified transport.
+ * @param type  Which transport to obtain.
+ * @return      Pointer to a static global.
+ */
+struct transport *transport_find(enum transport_type type);
+
+#endif