net.h revision 38451 
1/*	$NetBSD: net.h,v 1.10 1995/10/20 00:46:30 cgd 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#define NETIF_DEBUG 1
42
43#ifndef _KERNEL	/* XXX - see <netinet/in.h> */
44#undef __IPADDR
45#define __IPADDR(x)	htonl((u_int32_t)(x))
46#endif
47
48#include "iodesc.h"
49
50#define BA { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }
51
52/* Returns true if n_long's on the same net */
53#define	SAMENET(a1, a2, m) ((a1.s_addr & m) == (a2.s_addr & m))
54
55#define MACPY(s, d) bcopy((char *)s, (char *)d, 6)
56
57#define MAXTMO 20	/* seconds */
58#define MINTMO 2	/* seconds */
59
60#define FNAME_SIZE 128
61#define	IFNAME_SIZE 16
62#define RECV_SIZE 1536	/* XXX delete this */
63
64/*
65 * How much room to leave for headers:
66 *  14: struct ether_header
67 *  20: struct ip
68 *   8: struct udphdr
69 * That's 42 but let's pad it out to 48 bytes.
70 */
71#define ETHER_SIZE 14
72#define	HEADER_SIZE 48
73
74extern	u_char bcea[6];
75extern	char rootpath[FNAME_SIZE];
76extern	char bootfile[FNAME_SIZE];
77extern	char hostname[FNAME_SIZE];
78extern	int hostnamelen;
79extern	char domainname[FNAME_SIZE];
80extern	int domainnamelen;
81extern	char ifname[IFNAME_SIZE];
82
83/* All of these are in network order. */
84extern	struct in_addr myip;
85extern	struct in_addr rootip;
86extern	struct in_addr swapip;
87extern	struct in_addr gateip;
88extern	struct in_addr nameip;
89extern	n_long netmask;
90
91extern	int debug;			/* defined in the machdep sources */
92
93extern struct iodesc sockets[SOPEN_MAX];
94
95/* ARP/RevARP functions: */
96u_char	*arpwhohas(struct iodesc *, struct in_addr);
97void	arp_reply(struct iodesc *, void *);
98int	rarp_getipaddress(int);
99
100/* Link functions: */
101ssize_t sendether(struct iodesc *d, void *pkt, size_t len,
102			u_char *dea, int etype);
103ssize_t readether(struct iodesc *d, void *pkt, size_t len,
104			time_t tleft, u_int16_t *etype);
105
106ssize_t	sendudp(struct iodesc *, void *, size_t);
107ssize_t	readudp(struct iodesc *, void *, size_t, time_t);
108ssize_t	sendrecv(struct iodesc *,
109		      ssize_t (*)(struct iodesc *, void *, size_t),
110			void *, size_t,
111		        ssize_t (*)(struct iodesc *, void *, size_t, time_t),
112			void *, size_t);
113
114/* Utilities: */
115char	*ether_sprintf(u_char *);
116int	in_cksum(void *, int);
117char	*inet_ntoa(struct in_addr);
118char	*intoa(n_long);		/* similar to inet_ntoa */
119n_long	inet_addr(char *);
120
121/* Machine-dependent functions: */
122time_t	getsecs(void);
123