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      1 /*	$NetBSD: net.c,v 1.7 2021/04/12 03:55:40 mrg Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Gordon W. Ross
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 /*
     29  * This module implements a "raw device" interface suitable for
     30  * use by the stand-alone I/O library NFS code.  This interface
     31  * does not support any "block" access, and exists only for the
     32  * purpose of initializing the network interface, getting boot
     33  * parameters, and performing the NFS mount.
     34  *
     35  * At open time, this does:
     36  *
     37  * find interface      - netif_open()
     38  * RARP for IP address - rarp_getipaddress()
     39  * RPC/bootparams      - callrpc(d, RPC_BOOTPARAMS, ...)
     40  * RPC/mountd          - nfs_mount(sock, ip, path)
     41  *
     42  * the root file handle from mountd is saved in a global
     43  * for use by the NFS open code (NFS/lookup).
     44  */
     45 
     46 #include <sys/param.h>
     47 #include <sys/socket.h>
     48 #include <net/if.h>
     49 #include <netinet/in.h>
     50 #include <netinet/in_systm.h>
     51 
     52 #include <lib/libsa/stand.h>
     53 #include <lib/libsa/net.h>
     54 #include <lib/libsa/bootparam.h>
     55 #include <lib/libsa/bootp.h>
     56 #include <lib/libsa/nfs.h>
     57 
     58 #include <lib/libkern/libkern.h>
     59 
     60 #include <promdev.h>
     61 
     62 #include "netif_news.h"
     63 
     64 int	netdev_sock = -1;
     65 static	int open_count;
     66 
     67 /*
     68  * Called by devopen after it sets f->f_dev to our devsw entry.
     69  * This opens the low-level device and sets f->f_devdata.
     70  */
     71 int
     72 net_open(struct romdev *pd)
     73 {
     74 	int error = 0;
     75 
     76 	/* On first open, do netif open, mount, etc. */
     77 	if (open_count == 0) {
     78 		/* Find network interface. */
     79 		if ((netdev_sock = netif_news_open(pd)) < 0) {
     80 			error = errno;
     81 			goto bad;
     82 		}
     83 		if ((error = net_mountroot()) != 0)
     84 			goto bad;
     85 	}
     86 	open_count++;
     87 bad:
     88 	return error;
     89 }
     90 
     91 int
     92 net_close(struct romdev *pd)
     93 {
     94 	/* On last close, do netif close, etc. */
     95 	if (open_count <= 0)
     96 		return 0;
     97 
     98 	if (--open_count == 0)
     99 		netif_news_close(netdev_sock);
    100 
    101 	return 0;
    102 }
    103 
    104 int
    105 net_mountroot(void)
    106 {
    107 
    108 #ifdef DEBUG
    109 	printf("net_mountroot\n");
    110 #endif
    111 
    112 	/*
    113 	 * Get info for NFS boot: our IP address, our hostname,
    114 	 * server IP address, and our root path on the server.
    115 	 * There are two ways to do this:  The old, Sun way,
    116 	 * and the more modern, BOOTP way. (RFC951, RFC1048)
    117 	 */
    118 
    119 #ifdef	SUN_BOOTPARAMS
    120 	/* Get boot info using RARP and Sun bootparams. */
    121 
    122 	/* Get our IP address.  (rarp.c) */
    123 	if (rarp_getipaddress(netdev_sock) == -1)
    124 		return (errno);
    125 
    126 	printf("boot: client IP address: %s\n", inet_ntoa(myip));
    127 
    128 	/* Get our hostname, server IP address. */
    129 	if (bp_whoami(netdev_sock))
    130 		return (errno);
    131 
    132 	printf("boot: client name: %s\n", hostname);
    133 
    134 	/* Get the root pathname. */
    135 	if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
    136 		return (errno);
    137 
    138 #else
    139 
    140 	/* Get boot info using BOOTP way. (RFC951, RFC1048) */
    141 	bootp(netdev_sock);
    142 
    143 	printf("Using IP address: %s\n", inet_ntoa(myip));
    144 
    145 	printf("myip: %s (%s)", hostname, inet_ntoa(myip));
    146 	if (gateip.s_addr)
    147 		printf(", gateip: %s", inet_ntoa(gateip));
    148 	if (netmask)
    149 		printf(", netmask: %s", intoa(netmask));
    150 	printf("\n");
    151 
    152 #endif
    153 
    154 	printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
    155 
    156 	/* Get the NFS file handle (mount). */
    157 	if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
    158 		return (errno);
    159 
    160 	return 0;
    161 }
    162