bsd/netinet/udp.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1982, 1986, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)udp.h       8.1 (Berkeley) 6/10/93
  61  */
  62
  63 #ifndef _NETINET_UDP_H_
  64 #define _NETINET_UDP_H_
  65 #include <sys/appleapiopts.h>
  66 #include <sys/types.h>          /* u_short */
  67
  68 /*
  69  * Udp protocol header.
  70  * Per RFC 768, September, 1981.
  71  */
  72 struct udphdr {
  73         u_short uh_sport;               /* source port */
  74         u_short uh_dport;               /* destination port */
  75         u_short uh_ulen;                /* udp length */
  76         u_short uh_sum;                 /* udp checksum */
  77 };
  78
  79 /*
  80  * User-settable options (used with setsockopt).
  81  */
  82 #define UDP_NOCKSUM     0x01    /* don't checksum outbound payloads */
  83 #ifdef PRIVATE
  84 #define UDP_KEEPALIVE_OFFLOAD   0x02 /* Send keep-alive at a given interval */
  85 #endif /* PRIVATE */
  86
  87 #ifdef PRIVATE
  88 /*
  89  * This is a mechanism to offload keep-alive or heartbeat messages
  90  * to the Wifi driver when the host processor is sleeping. The application
  91  * will give a small amount of data that can be placed in the message. The
  92  * application will also specify an interval at which these messages
  93  * should be sent.
  94  *
  95  * The purpose of these messages is to detect loss of connectivity in
  96  * peer-to-peer communication without keeping the host processor awake.
  97  *
  98  * The application will pass this data to the kernel using setsockopt. It
  99  * can set the interval to 0 to disable keepalive offload.
 100  */
 101 #define UDP_KEEPALIVE_OFFLOAD_DATA_SIZE 32
 102
 103 /* Maximum keep alive interval in seconds */
 104 #define UDP_KEEPALIVE_INTERVAL_MAX_SECONDS      65536
 105
 106 struct udp_keepalive_offload {
 107         u_char ka_data[UDP_KEEPALIVE_OFFLOAD_DATA_SIZE];
 108         u_int16_t ka_interval;          /* interval in seconds */
 109         u_int8_t ka_data_len;           /* valid length of ka_data */
 110         u_int8_t ka_type;               /* type of application */
 111 #define UDP_KEEPALIVE_OFFLOAD_TYPE_AIRPLAY      0x1
 112 };
 113
 114 #endif /* PRIVATE */
 115 #endif /* _NETINET_UDP_H */