1 /* $NetBSD: net.c,v 1.1 1999/12/22 05:54:41 tsubai 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 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 4. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Gordon W. Ross 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * This module implements a "raw device" interface suitable for 35 * use by the stand-alone I/O library NFS code. This interface 36 * does not support any "block" access, and exists only for the 37 * purpose of initializing the network interface, getting boot 38 * parameters, and performing the NFS mount. 39 * 40 * At open time, this does: 41 * 42 * find interface - netif_open() 43 * RARP for IP address - rarp_getipaddress() 44 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...) 45 * RPC/mountd - nfs_mount(sock, ip, path) 46 * 47 * the root file handle from mountd is saved in a global 48 * for use by the NFS open code (NFS/lookup). 49 */ 50 51 #include <sys/param.h> 52 #include <sys/socket.h> 53 #include <net/if.h> 54 #include <netinet/in.h> 55 #include <netinet/in_systm.h> 56 57 #include <lib/libsa/stand.h> 58 #include <lib/libsa/net.h> 59 #include <lib/libsa/netif.h> 60 #include <lib/libsa/bootparam.h> 61 #include <lib/libsa/nfs.h> 62 63 #include <lib/libkern/libkern.h> 64 65 #include <promdev.h> 66 67 char rootpath[FNAME_SIZE]; 68 69 int netdev_sock = -1; 70 static int open_count; 71 72 /* 73 * Called by devopen after it sets f->f_dev to our devsw entry. 74 * This opens the low-level device and sets f->f_devdata. 75 */ 76 int 77 net_open(pd) 78 struct romdev *pd; 79 { 80 int error = 0; 81 82 /* On first open, do netif open, mount, etc. */ 83 if (open_count == 0) { 84 /* Find network interface. */ 85 if ((netdev_sock = netif_open(pd)) < 0) { 86 error = errno; 87 goto bad; 88 } 89 if ((error = net_mountroot()) != 0) 90 goto bad; 91 } 92 open_count++; 93 bad: 94 return (error); 95 } 96 97 int 98 net_close(pd) 99 struct romdev *pd; 100 { 101 /* On last close, do netif close, etc. */ 102 if (open_count <= 0) 103 return (0); 104 105 if (--open_count == 0) 106 return (netif_close(netdev_sock)); 107 108 return (0); 109 } 110 111 int 112 net_mountroot() 113 { 114 115 #ifdef DEBUG 116 printf("net_mountroot\n"); 117 #endif 118 119 /* 120 * Get info for NFS boot: our IP address, our hostname, 121 * server IP address, and our root path on the server. 122 * There are two ways to do this: The old, Sun way, 123 * and the more modern, BOOTP way. (RFC951, RFC1048) 124 */ 125 126 #ifdef SUN_BOOTPARAMS 127 /* Get boot info using RARP and Sun bootparams. */ 128 129 /* Get our IP address. (rarp.c) */ 130 if (rarp_getipaddress(netdev_sock) == -1) 131 return (errno); 132 133 printf("boot: client IP address: %s\n", inet_ntoa(myip)); 134 135 /* Get our hostname, server IP address. */ 136 if (bp_whoami(netdev_sock)) 137 return (errno); 138 139 printf("boot: client name: %s\n", hostname); 140 141 /* Get the root pathname. */ 142 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 143 return (errno); 144 145 #else 146 147 /* Get boot info using BOOTP way. (RFC951, RFC1048) */ 148 bootp(netdev_sock); 149 150 printf("Using IP address: %s\n", inet_ntoa(myip)); 151 152 printf("myip: %s (%s)", hostname, inet_ntoa(myip)); 153 if (gateip) 154 printf(", gateip: %s", inet_ntoa(gateip)); 155 if (netmask) 156 printf(", netmask: %s", intoa(netmask)); 157 printf("\n"); 158 159 #endif 160 161 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 162 163 /* Get the NFS file handle (mount). */ 164 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 165 return (errno); 166 167 return (0); 168 } 169