Phonet: global definitions

Signed-off-by: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 125 insertions, 0 deletions

diff --git a/include/linux/phonet.h b/include/linux/phonet.h
new file mode 100644
index 000000000000..6a764f8584a4
--- /dev/null
+++ b/include/linux/phonet.h
@@ -0,0 +1,125 @@
+/**
+ * file phonet.h
+ *
+ * Phonet sockets kernel interface
+ *
+ * Copyright (C) 2008 Nokia Corporation. All rights reserved.
+ *
+ * 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 LINUX_PHONET_H
+#define LINUX_PHONET_H
+
+/* Automatic protocol selection */
+#define PN_PROTO_TRANSPORT	0
+/* Phonet datagram socket */
+#define PN_PROTO_PHONET		1
+#define PHONET_NPROTO		2
+
+#define PNADDR_ANY		0
+#define PNPORT_RESOURCE_ROUTING	0
+
+/* Phonet protocol header */
+struct phonethdr {
+	__u8	pn_rdev;
+	__u8	pn_sdev;
+	__u8	pn_res;
+	__be16	pn_length;
+	__u8	pn_robj;
+	__u8	pn_sobj;
+} __attribute__((packed));
+
+/* Phonet socket address structure */
+struct sockaddr_pn {
+	sa_family_t spn_family;
+	__u8 spn_obj;
+	__u8 spn_dev;
+	__u8 spn_resource;
+	__u8 spn_zero[sizeof(struct sockaddr) - sizeof(sa_family_t) - 3];
+} __attribute__ ((packed));
+
+static inline __u16 pn_object(__u8 addr, __u16 port)
+{
+	return (addr << 8) | (port & 0x3ff);
+}
+
+static inline __u8 pn_obj(__u16 handle)
+{
+	return handle & 0xff;
+}
+
+static inline __u8 pn_dev(__u16 handle)
+{
+	return handle >> 8;
+}
+
+static inline __u16 pn_port(__u16 handle)
+{
+	return handle & 0x3ff;
+}
+
+static inline __u8 pn_addr(__u16 handle)
+{
+	return (handle >> 8) & 0xfc;
+}
+
+static inline void pn_sockaddr_set_addr(struct sockaddr_pn *spn, __u8 addr)
+{
+	spn->spn_dev &= 0x03;
+	spn->spn_dev |= addr & 0xfc;
+}
+
+static inline void pn_sockaddr_set_port(struct sockaddr_pn *spn, __u16 port)
+{
+	spn->spn_dev &= 0xfc;
+	spn->spn_dev |= (port >> 8) & 0x03;
+	spn->spn_obj = port & 0xff;
+}
+
+static inline void pn_sockaddr_set_object(struct sockaddr_pn *spn,
+						__u16 handle)
+{
+	spn->spn_dev = pn_dev(handle);
+	spn->spn_obj = pn_obj(handle);
+}
+
+static inline void pn_sockaddr_set_resource(struct sockaddr_pn *spn,
+						__u8 resource)
+{
+	spn->spn_resource = resource;
+}
+
+static inline __u8 pn_sockaddr_get_addr(const struct sockaddr_pn *spn)
+{
+	return spn->spn_dev & 0xfc;
+}
+
+static inline __u16 pn_sockaddr_get_port(const struct sockaddr_pn *spn)
+{
+	return ((spn->spn_dev & 0x03) << 8) | spn->spn_obj;
+}
+
+static inline __u16 pn_sockaddr_get_object(const struct sockaddr_pn *spn)
+{
+	return pn_object(spn->spn_dev, spn->spn_obj);
+}
+
+static inline __u8 pn_sockaddr_get_resource(const struct sockaddr_pn *spn)
+{
+	return spn->spn_resource;
+}
+
+#endif