1/* $NetBSD$ */ 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#include <lib/libsa/bootp.h> 64#include <lib/libsa/bootparam.h> 65#include <lib/libsa/nfs.h> 66 67#include <lib/libkern/libkern.h> 68 69#include "ofdev.h" 70#include "net.h" 71 72 73static int net_mountroot_bootparams(void); 74static int net_mountroot_bootp(void); 75 76char rootpath[FNAME_SIZE]; 77 78static int netdev_sock = -1; 79static int open_count; 80 81/* 82 * Called by devopen after it sets f->f_dev to our devsw entry. 83 * This opens the low-level device and sets f->f_devdata. 84 */ 85int 86net_open(struct of_dev *op) 87{ 88 int error = 0; 89 90 /* 91 * On first open, do netif open, mount, etc. 92 */ 93 if (open_count == 0) { 94 /* Find network interface. */ 95 if ((netdev_sock = netif_open(op)) < 0) { 96 error = errno; 97 goto bad; 98 } 99 } 100 open_count++; 101bad: 102 if (netdev_sock >= 0 && open_count == 0) { 103 netif_close(netdev_sock); 104 netdev_sock = -1; 105 } 106 return error; 107} 108 109int 110net_close(struct of_dev *op) 111{ 112 113 /* 114 * On last close, do netif close, etc. 115 */ 116 if (open_count > 0) 117 if (--open_count == 0) { 118 netif_close(netdev_sock); 119 netdev_sock = -1; 120 } 121 return 0; 122} 123 124static void 125net_clear_params(void) 126{ 127 128 myip.s_addr = 0; 129 netmask = 0; 130 gateip.s_addr = 0; 131 *hostname = '\0'; 132 rootip.s_addr = 0; 133 *rootpath = '\0'; 134} 135 136int 137net_mountroot_bootparams(void) 138{ 139 140 net_clear_params(); 141 142 /* Get our IP address. (rarp.c) */ 143 if (rarp_getipaddress(netdev_sock) == -1) 144 return (errno); 145 printf("Using BOOTPARAMS protocol:\n ip addr=%s\n", inet_ntoa(myip)); 146 if (bp_whoami(netdev_sock)) 147 return (errno); 148 printf(" hostname=%s\n", hostname); 149 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 150 return (errno); 151 152 return (0); 153} 154 155int 156net_mountroot_bootp(void) 157{ 158 int attempts; 159 160 /* We need a few attempts here as some DHCP servers 161 * require >1 packet and my wireless bridge is always 162 * in learning mode until the 2nd attempt ... */ 163 for (attempts = 0; attempts < 3; attempts++) { 164 net_clear_params(); 165 bootp(netdev_sock); 166 if (myip.s_addr != 0) 167 break; 168 } 169 if (myip.s_addr == 0) 170 return(ENOENT); 171 172 printf("Using BOOTP protocol:\n ip addr=%s\n", inet_ntoa(myip)); 173 if (hostname[0]) 174 printf(" hostname=%s\n", hostname); 175 if (netmask) 176 printf(" netmask=%s\n", intoa(netmask)); 177 if (gateip.s_addr) 178 printf(" gateway=%s\n", inet_ntoa(gateip)); 179 180 return (0); 181} 182 183/* 184 * libsa's tftp_open expects a pointer to netdev_sock, i.e. an (int *), 185 * in f_devdata, a pointer to which gets handed down from devopen(). 186 * 187 * Do not expect booting via different methods to have the same 188 * requirements or semantics. 189 * 190 * net_tftp_bootp uses net_mountroot_bootp because that incidentially does 191 * most of what it needs to do. It of course in no manner actually mounts 192 * anything, all that routine actually does is prepare the socket for the 193 * necessary net access, and print info for the user. 194 */ 195 196int 197net_tftp_bootp(int **sock) 198{ 199 200 net_mountroot_bootp(); 201 if (myip.s_addr == 0) 202 return(ENOENT); 203 204 *sock = &netdev_sock; 205 return (0); 206} 207 208int 209net_mountroot(void) 210{ 211 int error; 212 213#ifdef DEBUG 214 printf("net_mountroot\n"); 215#endif 216 217 /* 218 * Get info for NFS boot: our IP address, our hostname, 219 * server IP address, and our root path on the server. 220 * There are two ways to do this: The old, Sun way, 221 * and the more modern, BOOTP way. (RFC951, RFC1048) 222 */ 223 224 /* Try BOOTP first */ 225 error = net_mountroot_bootp(); 226 /* Historically, we've used BOOTPARAMS, so try that next */ 227 if (error != 0) 228 error = net_mountroot_bootparams(); 229 if (error != 0) 230 return (error); 231 232 printf(" root addr=%s\n path=%s\n", inet_ntoa(rootip), rootpath); 233 234 /* Get the NFS file handle (mount). */ 235 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 236 return (errno); 237 238 return (0); 239} 240