1 /* $NetBSD: net.c,v 1.2 2003/03/13 14:49:12 drochner 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/bootparam.h> 60 #include <lib/libsa/nfs.h> 61 62 #include <lib/libkern/libkern.h> 63 64 #include <promdev.h> 65 66 #include "netif_news.h" 67 68 char rootpath[FNAME_SIZE]; 69 70 int netdev_sock = -1; 71 static int open_count; 72 73 /* 74 * Called by devopen after it sets f->f_dev to our devsw entry. 75 * This opens the low-level device and sets f->f_devdata. 76 */ 77 int 78 net_open(pd) 79 struct romdev *pd; 80 { 81 int error = 0; 82 83 /* On first open, do netif open, mount, etc. */ 84 if (open_count == 0) { 85 /* Find network interface. */ 86 if ((netdev_sock = netif_news_open(pd)) < 0) { 87 error = errno; 88 goto bad; 89 } 90 if ((error = net_mountroot()) != 0) 91 goto bad; 92 } 93 open_count++; 94 bad: 95 return (error); 96 } 97 98 int 99 net_close(pd) 100 struct romdev *pd; 101 { 102 /* On last close, do netif close, etc. */ 103 if (open_count <= 0) 104 return (0); 105 106 if (--open_count == 0) 107 netif_news_close(netdev_sock); 108 109 return (0); 110 } 111 112 int 113 net_mountroot() 114 { 115 116 #ifdef DEBUG 117 printf("net_mountroot\n"); 118 #endif 119 120 /* 121 * Get info for NFS boot: our IP address, our hostname, 122 * server IP address, and our root path on the server. 123 * There are two ways to do this: The old, Sun way, 124 * and the more modern, BOOTP way. (RFC951, RFC1048) 125 */ 126 127 #ifdef SUN_BOOTPARAMS 128 /* Get boot info using RARP and Sun bootparams. */ 129 130 /* Get our IP address. (rarp.c) */ 131 if (rarp_getipaddress(netdev_sock) == -1) 132 return (errno); 133 134 printf("boot: client IP address: %s\n", inet_ntoa(myip)); 135 136 /* Get our hostname, server IP address. */ 137 if (bp_whoami(netdev_sock)) 138 return (errno); 139 140 printf("boot: client name: %s\n", hostname); 141 142 /* Get the root pathname. */ 143 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 144 return (errno); 145 146 #else 147 148 /* Get boot info using BOOTP way. (RFC951, RFC1048) */ 149 bootp(netdev_sock); 150 151 printf("Using IP address: %s\n", inet_ntoa(myip)); 152 153 printf("myip: %s (%s)", hostname, inet_ntoa(myip)); 154 if (gateip) 155 printf(", gateip: %s", inet_ntoa(gateip)); 156 if (netmask) 157 printf(", netmask: %s", intoa(netmask)); 158 printf("\n"); 159 160 #endif 161 162 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 163 164 /* Get the NFS file handle (mount). */ 165 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 166 return (errno); 167 168 return (0); 169 } 170