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net.h revision 1.17 
      1 /*	$NetBSD: net.h,v 1.17 2006/01/21 10:06:06 dsl Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1993 Adam Glass
      5  * Copyright (c) 1992 Regents of the University of California.
      6  * All rights reserved.
      7  *
      8  * This software was developed by the Computer Systems Engineering group
      9  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
     10  * contributed to Berkeley.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by the University of
     23  *	California, Lawrence Berkeley Laboratory and its contributors.
     24  * 4. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  */
     40 
     41 #ifndef _KERNEL	/* XXX - see <netinet/in.h> */
     42 #undef __IPADDR
     43 #define __IPADDR(x)	htonl((u_int32_t)(x))
     44 #endif
     45 
     46 #include <iodesc.h>
     47 
     48 #define BA { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }
     49 
     50 /* Returns true if n_long's on the same net */
     51 #define	SAMENET(a1, a2, m) ((a1.s_addr & m) == (a2.s_addr & m))
     52 
     53 #define MACPY(s, d) bcopy((char *)s, (char *)d, 6)
     54 
     55 #define MAXTMO 20	/* seconds */
     56 #define MINTMO 2	/* seconds */
     57 
     58 #define FNAME_SIZE 128
     59 #define	IFNAME_SIZE 16
     60 #define RECV_SIZE 1536	/* XXX delete this */
     61 
     62 /*
     63  * How much room to leave for headers:
     64  *  14: struct ether_header
     65  *  20: struct ip
     66  *   8: struct udphdr
     67  * That's 42 but let's pad it out to 48 bytes.
     68  */
     69 #define ETHER_SIZE 14
     70 #define	HEADER_SIZE 48
     71 
     72 extern	u_char bcea[6];
     73 extern	char rootpath[FNAME_SIZE];
     74 extern	char bootfile[FNAME_SIZE];
     75 extern	char hostname[FNAME_SIZE];
     76 
     77 /* All of these are in network order. */
     78 extern	struct in_addr myip;
     79 extern	struct in_addr rootip;
     80 extern	struct in_addr gateip;
     81 extern	n_long netmask;
     82 
     83 extern	int debug;			/* defined in the machdep sources */
     84 
     85 /* ARP/RevARP functions: */
     86 u_char	*arpwhohas __P((struct iodesc *, struct in_addr));
     87 void	arp_reply __P((struct iodesc *, void *));
     88 int	rarp_getipaddress __P((int));
     89 
     90 /* Link functions: */
     91 ssize_t sendether __P((struct iodesc *d, void *pkt, size_t len,
     92 			u_char *dea, int etype));
     93 ssize_t readether __P((struct iodesc *d, void *pkt, size_t len,
     94 			time_t tleft, u_int16_t *etype));
     95 
     96 ssize_t	sendudp __P((struct iodesc *, void *, size_t));
     97 ssize_t	readudp __P((struct iodesc *, void *, size_t, time_t));
     98 ssize_t	sendrecv __P((struct iodesc *,
     99 		      ssize_t (*)(struct iodesc *, void *, size_t),
    100 			void *, size_t,
    101 		        ssize_t (*)(struct iodesc *, void *, size_t, time_t),
    102 			void *, size_t));
    103 
    104 /* Utilities: */
    105 char	*ether_sprintf __P((u_char *));
    106 int	in_cksum __P((void *, int));
    107 int	in_cksum __P((void *, int));
    108 
    109 /* Machine-dependent functions: */
    110 time_t	getsecs __P((void));
    111