xnu-3789.70.16.tar.gz

[apple/xnu.git] / bsd / netinet / udp.h

diff --git a/bsd/netinet/udp.h b/bsd/netinet/udp.h
index 9fa2bb55e09f91f6fae736601e09ce6d8d6978ef..3f4a473469b2a5b538a8fe3fd30eb87ba6f52f8a 100644 (file)
--- a/bsd/netinet/udp.h
+++ b/bsd/netinet/udp.h
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * Copyright (c) 1982, 1986, 1993
@@ -57,6 +63,7 @@
 #ifndef _NETINET_UDP_H_
 #define _NETINET_UDP_H_
 #include <sys/appleapiopts.h>
+#include <sys/types.h>         /* u_short */
 
 /*
  * Udp protocol header.
@@ -69,4 +76,40 @@ struct udphdr {
        u_short uh_sum;                 /* udp checksum */
 };
 
-#endif
+/*
+ * User-settable options (used with setsockopt).
+ */
+#define        UDP_NOCKSUM     0x01    /* don't checksum outbound payloads */
+#ifdef PRIVATE
+#define UDP_KEEPALIVE_OFFLOAD  0x02 /* Send keep-alive at a given interval */
+#endif /* PRIVATE */
+
+#ifdef PRIVATE
+/*
+ * This is a mechanism to offload keep-alive or heartbeat messages
+ * to the Wifi driver when the host processor is sleeping. The application
+ * will give a small amount of data that can be placed in the message. The
+ * application will also specify an interval at which these messages
+ * should be sent.
+ *
+ * The purpose of these messages is to detect loss of connectivity in
+ * peer-to-peer communication without keeping the host processor awake.
+ *
+ * The application will pass this data to the kernel using setsockopt. It
+ * can set the interval to 0 to disable keepalive offload. 
+ */
+#define        UDP_KEEPALIVE_OFFLOAD_DATA_SIZE 32
+
+/* Maximum keep alive interval in seconds */
+#define UDP_KEEPALIVE_INTERVAL_MAX_SECONDS     65536
+
+struct udp_keepalive_offload {
+       u_char ka_data[UDP_KEEPALIVE_OFFLOAD_DATA_SIZE];
+       u_int16_t ka_interval;          /* interval in seconds */
+       u_int8_t ka_data_len;           /* valid length of ka_data */
+       u_int8_t ka_type;               /* type of application */
+#define        UDP_KEEPALIVE_OFFLOAD_TYPE_AIRPLAY      0x1
+};
+
+#endif /* PRIVATE */
+#endif /* _NETINET_UDP_H */