1 /* $NetBSD: net.c,v 1.2 2002/05/14 14:27:34 lukem Exp $ */ 2 3 /* 4 * Copyright (C) 1995 Wolfgang Solfrank. 5 * Copyright (C) 1995 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * This module implements a "raw device" interface suitable for 36 * use by the stand-alone I/O library NFS code. This interface 37 * does not support any "block" access, and exists only for the 38 * purpose of initializing the network interface, getting boot 39 * parameters, and performing the NFS mount. 40 * 41 * At open time, this does: 42 * 43 * find interface - netif_open() 44 * BOOTP - bootp() 45 * RPC/mountd - nfs_mount() 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 * Note: this is based in part on sys/arch/sparc/stand/net.c 51 */ 52 53 #include <sys/param.h> 54 #include <sys/socket.h> 55 56 #include <net/if.h> 57 #include <netinet/in.h> 58 #include <netinet/in_systm.h> 59 60 #include <lib/libsa/stand.h> 61 #include <lib/libsa/net.h> 62 #include <lib/libsa/netif.h> 63 64 #include <lib/libkern/libkern.h> 65 66 static int net_mountroot_bootparams __P((void)); 67 static int net_mountroot_bootp __P((void)); 68 69 char rootpath[FNAME_SIZE]; 70 71 static int netdev_sock = -1; 72 static int open_count; 73 74 /* 75 * Called by devopen after it sets f->f_dev to our devsw entry. 76 * This opens the low-level device and sets f->f_devdata. 77 */ 78 int 79 net_open(op) 80 struct of_dev *op; 81 { 82 int error = 0; 83 84 /* 85 * On first open, do netif open, mount, etc. 86 */ 87 if (open_count == 0) { 88 /* Find network interface. */ 89 if ((netdev_sock = netif_open(op)) < 0) { 90 error = errno; 91 goto bad; 92 } 93 if ((error = net_mountroot()) != 0) 94 goto bad; 95 } 96 open_count++; 97 bad: 98 if (netdev_sock >= 0 && open_count == 0) { 99 netif_close(netdev_sock); 100 netdev_sock = -1; 101 } 102 return error; 103 } 104 105 int 106 net_close(op) 107 struct of_dev *op; 108 { 109 /* 110 * On last close, do netif close, etc. 111 */ 112 if (open_count > 0) 113 if (--open_count == 0) { 114 netif_close(netdev_sock); 115 netdev_sock = -1; 116 } 117 } 118 119 int 120 net_mountroot_bootparams() 121 { 122 /* Get our IP address. (rarp.c) */ 123 if (rarp_getipaddress(netdev_sock) == -1) 124 return (errno); 125 126 printf("Using BOOTPARAMS protocol: "); 127 printf("ip address: %s", inet_ntoa(myip)); 128 129 /* Get our hostname, server IP address. */ 130 if (bp_whoami(netdev_sock)) 131 return (errno); 132 133 printf(", hostname: %s\n", hostname); 134 135 /* Get the root pathname. */ 136 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 137 return (errno); 138 139 return (0); 140 } 141 142 int 143 net_mountroot_bootp() 144 { 145 bootp(netdev_sock); 146 147 if (myip.s_addr == 0) 148 return(ENOENT); 149 150 printf("Using BOOTP protocol: "); 151 printf("ip address: %s", inet_ntoa(myip)); 152 153 if (hostname[0]) 154 printf(", hostname: %s", hostname); 155 if (netmask) 156 printf(", netmask: %s", intoa(netmask)); 157 if (gateip.s_addr) 158 printf(", gateway: %s", inet_ntoa(gateip)); 159 printf("\n"); 160 161 return (0); 162 } 163 164 int 165 net_mountroot() 166 { 167 int error; 168 169 #ifdef DEBUG 170 printf("net_mountroot\n"); 171 #endif 172 173 /* 174 * Get info for NFS boot: our IP address, our hostname, 175 * server IP address, and our root path on the server. 176 * There are two ways to do this: The old, Sun way, 177 * and the more modern, BOOTP way. (RFC951, RFC1048) 178 */ 179 180 /* Try BOOTP first */ 181 error = net_mountroot_bootp(); 182 /* Historically, we've used BOOTPARAMS, so try that next */ 183 if (error != 0) 184 error = net_mountroot_bootparams(); 185 if (error != 0) 186 return (error); 187 188 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 189 190 /* Get the NFS file handle (mount). */ 191 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 192 return (errno); 193 194 return (0); 195 } 196