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net.h revision 1.6 
      1 /*	$NetBSD: net.h,v 1.6 1995/09/14 23:45:27 pk 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 #include "iodesc.h"
     42 
     43 #define BA { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }
     44 
     45 /* Returns true if n_long's on the same net */
     46 #define	SAMENET(a1, a2, m) ((a1 & m) == (a2 & m))
     47 
     48 #define MACPY(s, d) bcopy((char *)s, (char *)d, 6)
     49 
     50 #define MAXTMO 20	/* seconds */
     51 #define MINTMO 2	/* seconds */
     52 
     53 #define FNAME_SIZE 128
     54 #define	IFNAME_SIZE 16
     55 #define RECV_SIZE 1536	/* XXX delete this */
     56 
     57 /*
     58  * How much room to leave for headers:
     59  *	14: struct ether_header
     60  *  20: struct ip
     61  *   8: struct udphdr
     62  * That's 42 but let's pad it out to 48 bytes.
     63  */
     64 #define ETHER_SIZE 14
     65 #define	HEADER_SIZE 48
     66 
     67 extern	u_char bcea[6];
     68 extern	char rootpath[FNAME_SIZE];
     69 extern	char bootfile[FNAME_SIZE];
     70 extern	char hostname[FNAME_SIZE];
     71 extern	char domainname[FNAME_SIZE];
     72 extern	char ifname[IFNAME_SIZE];
     73 
     74 extern	n_long myip;
     75 extern	n_long rootip;
     76 extern	n_long swapip;
     77 extern	n_long gateip;
     78 extern	n_long nameip;
     79 extern	n_long mask;
     80 
     81 extern	int debug;			/* defined in the machdep sources */
     82 
     83 extern struct iodesc sockets[SOPEN_MAX];
     84 
     85 /* ARP functions: */
     86 
     87 u_char	*arpwhohas __P((struct iodesc *, n_long));
     88 void	arp_reply __P((struct iodesc *, void *));
     89 
     90 ssize_t sendether __P((struct iodesc *d, void *pkt, size_t len,
     91 			u_char *dea, int etype));
     92 ssize_t readether __P((struct iodesc *d, void *pkt, size_t len,
     93 			time_t tleft, u_int16_t *etype));
     94 
     95 ssize_t	sendudp __P((struct iodesc *, void *, size_t));
     96 ssize_t	readudp __P((struct iodesc *, void *, size_t, time_t));
     97 ssize_t	sendrecv __P((struct iodesc *,
     98 		      ssize_t (*)(struct iodesc *, void *, size_t),
     99 			void *, size_t,
    100 		      ssize_t (*)(struct iodesc *, void *, size_t, time_t),
    101 			void *, size_t));
    102 
    103 /* utilities: */
    104 
    105 char	*ether_sprintf __P((u_char *));
    106 int	in_cksum __P((void *, int));
    107 char	*intoa __P((n_long));			/* similar to inet_ntoa */
    108 
    109 /* Machine-dependent functions: */
    110 
    111 time_t	getsecs __P((void));
    112