Phonet datagram socket helpers

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>

isi/Makefile.am

@@ -4,5 +4,6 @@ noinst_LTLIBRARIES = libgisi.la
 MAINTAINERCLEANFILES = Makefile.in
 
 libgisi_la_SOURCES = \
-	netlink.h netlink.c
+	netlink.h netlink.c \
+	socket.h socket.c
 libgisi_la_LIBADD = @GLIB_LIBS@

isi/socket.c

@@ -0,0 +1,93 @@
+/*
+ * This file is part of oFono - Open Source Telephony
+ *
+ * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Contact: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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 <stdint.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <linux/types.h>
+#include <linux/phonet.h>
+#include <glib.h>
+
+#ifndef AF_PHONET
+#define AF_PHONET 35
+#define PF_PHONET AF_PHONET
+#endif
+#include "socket.h"
+
+GIOChannel *phonet_new(uint8_t resource)
+{
+	GIOChannel *channel;
+	struct sockaddr_pn addr = {
+		.spn_family = AF_PHONET,
+		.spn_resource = resource,
+	};
+
+	int fd = socket(PF_PHONET, SOCK_DGRAM, 0);
+	if (fd == -1)
+		return NULL;
+	fcntl(fd, F_SETFD, FD_CLOEXEC);
+	/* Use blocking mode on purpose. */
+	if (bind(fd, (struct sockaddr *)&addr, sizeof(addr))) {
+		close(fd);
+		return NULL;
+	}
+
+	channel = g_io_channel_unix_new(fd);
+	g_io_channel_set_close_on_unref(channel, TRUE);
+	g_io_channel_set_encoding(channel, NULL, NULL);
+	g_io_channel_set_buffered(channel, FALSE);
+	return channel;
+}
+
+size_t phonet_peek_length(GIOChannel *channel)
+{
+	int len;
+	int fd = g_io_channel_unix_get_fd(channel);
+	return ioctl(fd, FIONREAD, &len) ? 0 : len;
+}
+
+ssize_t phonet_read(GIOChannel *channel, void *restrict buf, size_t len,
+			uint16_t *restrict obj, uint8_t *restrict res)
+{
+	struct sockaddr_pn addr;
+	socklen_t addrlen = sizeof(addr);
+	ssize_t ret;
+
+	ret = recvfrom(g_io_channel_unix_get_fd(channel), buf, len,
+			MSG_DONTWAIT, (struct sockaddr *)&addr, &addrlen);
+	if (ret == -1)
+		return -1;
+
+	if (obj != NULL)
+		*obj = pn_sockaddr_get_object(&addr);
+	if (res != NULL)
+		*res = addr.spn_resource;
+	return ret;
+}

isi/socket.h

@@ -0,0 +1,31 @@
+/*
+ * This file is part of oFono - Open Source Telephony
+ *
+ * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Contact: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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
+ *
+ */
+
+#ifndef OFONO_PHONET_SOCKET_H
+#define OFONO_PHONET_SOCKET_H 1
+
+GIOChannel *phonet_new(uint8_t resource);
+size_t phonet_peek_length(GIOChannel *);
+ssize_t phonet_read(GIOChannel *, void *restrict, size_t, uint16_t *restrict,
+			uint8_t *restrict);
+#endif