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net.h revision 1.28 
      1 /*	$NetBSD: net.h,v 1.28 2019/03/31 20:08:45 christos 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 <net/if_ether.h>	/* for ETHER_ADDR_LEN */
     42 #include <netinet/in.h>
     43 #include <netinet/in_systm.h>
     44 
     45 #ifndef _KERNEL	/* XXX - see <netinet/in.h> */
     46 #undef __IPADDR
     47 #define __IPADDR(x)	htonl((u_int32_t)(x))
     48 #endif
     49 
     50 #ifdef _STANDALONE
     51 #include <lib/libsa/iodesc.h>
     52 #else
     53 #include <iodesc.h>
     54 #endif
     55 
     56 #define BA { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }
     57 
     58 /* Returns true if n_long's on the same net */
     59 #define	SAMENET(a1, a2, m) ((a1.s_addr & m) == (a2.s_addr & m))
     60 
     61 #define MACPY(s, d) memcpy(d, s, ETHER_ADDR_LEN)
     62 
     63 #define MAXTMO 20	/* seconds */
     64 #define MINTMO 2	/* seconds */
     65 
     66 #define FNAME_SIZE 128
     67 #define	IFNAME_SIZE 16
     68 #define RECV_SIZE 1536	/* XXX delete this */
     69 
     70 /*
     71  * How much room to leave for headers in UDP packets:
     72  *  14: struct ether_header
     73  *  20: struct ip
     74  *   8: struct udphdr
     75  * That's 42 but let's pad it out to 48 bytes.
     76  */
     77 #define ETHERNET_HEADER_SIZE 14
     78 #define IP_HEADER_SIZE 20
     79 #define UDP_HEADER_SIZE 8
     80 
     81 #define	UDP_TOTAL_HEADER_SIZE (ETHERNET_HEADER_SIZE + IP_HEADER_SIZE + UDP_HEADER_SIZE)
     82 
     83 /*
     84  * How much room to leave for headers in TCP packets:
     85  *  14: struct ether_header
     86  *  20: struct ip
     87  *  20: struct tcphdr
     88  */
     89 #define TCP_HEADER_SIZE 20
     90 
     91 #define TCP_TOTAL_HEADER_SIZE (ETHERNET_HEADER_SIZE + IP_HEADER_SIZE + TCP_HEADER_SIZE)
     92 
     93 extern	u_char bcea[ETHER_ADDR_LEN];
     94 extern	char rootpath[FNAME_SIZE];
     95 extern	char bootfile[FNAME_SIZE];
     96 extern	char hostname[FNAME_SIZE];
     97 
     98 /* All of these are in network order. */
     99 extern	struct in_addr myip;
    100 extern	struct in_addr rootip;
    101 extern	struct in_addr gateip;
    102 extern	n_long netmask;
    103 
    104 extern	int debug;			/* defined in the machdep sources */
    105 
    106 /* ARP/RevARP functions: */
    107 u_char	*arpwhohas(struct iodesc *, struct in_addr);
    108 void	arp_reply(struct iodesc *, void *);
    109 int	rarp_getipaddress(int);
    110 
    111 /* Link functions: */
    112 ssize_t sendether(struct iodesc *, void *, size_t, u_char *, int);
    113 ssize_t readether(struct iodesc *, void *, size_t, saseconds_t, u_int16_t *);
    114 
    115 ssize_t	sendip __P((struct iodesc *, void *, size_t, u_int8_t));
    116 ssize_t	readip __P((struct iodesc *, void *, size_t, time_t, u_int8_t));
    117 
    118 ssize_t	sendudp(struct iodesc *, void *, size_t);
    119 ssize_t	readudp(struct iodesc *, void *, size_t, saseconds_t);
    120 
    121 int	tcp_connect __P((struct iodesc *));
    122 ssize_t	sendtcp __P((struct iodesc *, void *, size_t));
    123 ssize_t	readtcp __P((struct iodesc *, void *, size_t, time_t));
    124 
    125 ssize_t	sendrecv(struct iodesc *, ssize_t (*)(struct iodesc *, void *, size_t),
    126     void *, size_t, ssize_t (*)(struct iodesc *, void *, size_t, saseconds_t),
    127     void *, size_t);
    128 
    129 /* Utilities: */
    130 char	*ether_sprintf(const u_char *);
    131 int	ip_cksum(const void *, size_t);
    132 
    133 /* Machine-dependent functions: */
    134 #ifdef _STANDALONE	/* XXX for mount_nfs(8) SMALLPROG hack */
    135 satime_t	getsecs(void);
    136 #else
    137 #define getsecs() time(NULL)
    138 #endif
    139