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authorRemi Denis-Courmont <remi.denis-courmont@nokia.com>2008-09-23 07:02:10 +0400
committerDavid S. Miller <davem@davemloft.net>2008-09-23 07:02:10 +0400
commit4b07b3f69a8471cdc142c51461a331226fef248a (patch)
tree661b8c841ad2e3922f22f585f8628083baa03546 /include/net/phonet/phonet.h
parentbce7b15426cac3000bf6a9cf59d9356ef0be2dec (diff)
downloadlinux-4b07b3f69a8471cdc142c51461a331226fef248a.tar.xz
Phonet: PF_PHONET protocol family support
This is the basis for the Phonet protocol families, and introduces the ETH_P_PHONET packet type and the PF_PHONET socket family. Signed-off-by: Remi Denis-Courmont <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/phonet/phonet.h')
-rw-r--r--include/net/phonet/phonet.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/include/net/phonet/phonet.h b/include/net/phonet/phonet.h
new file mode 100644
index 000000000000..c53f2abc0595
--- /dev/null
+++ b/include/net/phonet/phonet.h
@@ -0,0 +1,74 @@
+/*
+ * File: af_phonet.h
+ *
+ * Phonet sockets kernel definitions
+ *
+ * Copyright (C) 2008 Nokia Corporation.
+ *
+ * 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 AF_PHONET_H
+#define AF_PHONET_H
+
+/*
+ * The lower layers may not require more space, ever. Make sure it's
+ * enough.
+ */
+#define MAX_PHONET_HEADER 8
+
+static inline struct phonethdr *pn_hdr(struct sk_buff *skb)
+{
+ return (struct phonethdr *)skb_network_header(skb);
+}
+
+/*
+ * Get the other party's sockaddr from received skb. The skb begins
+ * with a Phonet header.
+ */
+static inline
+void pn_skb_get_src_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
+{
+ struct phonethdr *ph = pn_hdr(skb);
+ u16 obj = pn_object(ph->pn_sdev, ph->pn_sobj);
+
+ sa->spn_family = AF_PHONET;
+ pn_sockaddr_set_object(sa, obj);
+ pn_sockaddr_set_resource(sa, ph->pn_res);
+ memset(sa->spn_zero, 0, sizeof(sa->spn_zero));
+}
+
+static inline
+void pn_skb_get_dst_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
+{
+ struct phonethdr *ph = pn_hdr(skb);
+ u16 obj = pn_object(ph->pn_rdev, ph->pn_robj);
+
+ sa->spn_family = AF_PHONET;
+ pn_sockaddr_set_object(sa, obj);
+ pn_sockaddr_set_resource(sa, ph->pn_res);
+ memset(sa->spn_zero, 0, sizeof(sa->spn_zero));
+}
+
+/* Protocols in Phonet protocol family. */
+struct phonet_protocol {
+ struct proto *prot;
+ int sock_type;
+};
+
+int phonet_proto_register(int protocol, struct phonet_protocol *pp);
+void phonet_proto_unregister(int protocol, struct phonet_protocol *pp);
+
+#endif