dev_net.c revision 101112
184059Swpaul/* 284059Swpaul * $FreeBSD: head/sys/boot/common/dev_net.c 101112 2002-07-31 20:17:06Z jake $ 384059Swpaul * From: $NetBSD: dev_net.c,v 1.12 1997/12/10 20:38:37 gwr Exp $ 484059Swpaul */ 584059Swpaul 684059Swpaul/*- 784059Swpaul * Copyright (c) 1997 The NetBSD Foundation, Inc. 884059Swpaul * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Gordon W. Ross. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42/* 43 * This module implements a "raw device" interface suitable for 44 * use by the stand-alone I/O library NFS code. This interface 45 * does not support any "block" access, and exists only for the 46 * purpose of initializing the network interface, getting boot 47 * parameters, and performing the NFS mount. 48 * 49 * At open time, this does: 50 * 51 * find interface - netif_open() 52 * RARP for IP address - rarp_getipaddress() 53 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...) 54 * RPC/mountd - nfs_mount(sock, ip, path) 55 * 56 * the root file handle from mountd is saved in a global 57 * for use by the NFS open code (NFS/lookup). 58 */ 59 60#include <machine/stdarg.h> 61#include <sys/param.h> 62#include <sys/socket.h> 63#include <net/if.h> 64#include <netinet/in.h> 65#include <netinet/in_systm.h> 66 67#include <stand.h> 68#include <string.h> 69#include <net.h> 70#include <netif.h> 71#include <bootp.h> 72#include <bootparam.h> 73 74#include "dev_net.h" 75#include "bootstrap.h" 76 77int debug = 0; 78 79static int netdev_sock = -1; 80static int netdev_opens; 81 82static int net_init(void); 83static int net_open(struct open_file *, ...); 84static int net_close(struct open_file *); 85static int net_strategy(); 86static void net_print(int); 87 88static int net_getparams(int sock); 89 90struct devsw netdev = { 91 "net", 92 DEVT_NET, 93 net_init, 94 net_strategy, 95 net_open, 96 net_close, 97 noioctl, 98 net_print 99}; 100 101int 102net_init(void) 103{ 104 return 0; 105} 106 107/* 108 * Called by devopen after it sets f->f_dev to our devsw entry. 109 * This opens the low-level device and sets f->f_devdata. 110 * This is declared with variable arguments... 111 */ 112int 113net_open(struct open_file *f, ...) 114{ 115 va_list args; 116 char *devname; /* Device part of file name (or NULL). */ 117 int error = 0; 118 119 va_start(args, f); 120 devname = va_arg(args, char*); 121 va_end(args); 122 123 /* On first open, do netif open, mount, etc. */ 124 if (netdev_opens == 0) { 125 /* Find network interface. */ 126 if (netdev_sock < 0) { 127 netdev_sock = netif_open(devname); 128 if (netdev_sock < 0) { 129 printf("net_open: netif_open() failed\n"); 130 return (ENXIO); 131 } 132 if (debug) 133 printf("net_open: netif_open() succeeded\n"); 134 } 135 if (rootip.s_addr == 0) { 136 /* Get root IP address, and path, etc. */ 137 error = net_getparams(netdev_sock); 138 if (error) { 139 /* getparams makes its own noise */ 140 netif_close(netdev_sock); 141 netdev_sock = -1; 142 return (error); 143 } 144 } 145 netdev_opens++; 146 } 147 netdev_opens++; 148 f->f_devdata = &netdev_sock; 149 return (error); 150} 151 152int 153net_close(f) 154 struct open_file *f; 155{ 156 157#ifdef NETIF_DEBUG 158 if (debug) 159 printf("net_close: opens=%d\n", netdev_opens); 160#endif 161 162 /* On last close, do netif close, etc. */ 163 f->f_devdata = NULL; 164 /* Extra close call? */ 165 if (netdev_opens <= 0) 166 return (0); 167 netdev_opens--; 168 /* Not last close? */ 169 if (netdev_opens > 0) 170 return(0); 171 rootip.s_addr = 0; 172 if (netdev_sock >= 0) { 173 if (debug) 174 printf("net_close: calling netif_close()\n"); 175 netif_close(netdev_sock); 176 netdev_sock = -1; 177 } 178 return (0); 179} 180 181int 182net_strategy() 183{ 184 return EIO; 185} 186 187#define SUPPORT_BOOTP 188 189/* 190 * Get info for NFS boot: our IP address, our hostname, 191 * server IP address, and our root path on the server. 192 * There are two ways to do this: The old, Sun way, 193 * and the more modern, BOOTP way. (RFC951, RFC1048) 194 * 195 * The default is to use the Sun bootparams RPC 196 * (because that is what the kernel will do). 197 * MD code can make try_bootp initialied data, 198 * which will override this common definition. 199 */ 200#ifdef SUPPORT_BOOTP 201int try_bootp = 1; 202#endif 203 204extern n_long ip_convertaddr(char *p); 205 206static int 207net_getparams(sock) 208 int sock; 209{ 210 char buf[MAXHOSTNAMELEN]; 211 char temp[FNAME_SIZE]; 212 struct iodesc *d; 213 int i; 214 n_long smask; 215 216#ifdef SUPPORT_BOOTP 217 /* 218 * Try to get boot info using BOOTP. If we succeed, then 219 * the server IP address, gateway, and root path will all 220 * be initialized. If any remain uninitialized, we will 221 * use RARP and RPC/bootparam (the Sun way) to get them. 222 */ 223 if (try_bootp) 224 bootp(sock, BOOTP_NONE); 225 if (myip.s_addr != 0) 226 goto exit; 227 if (debug) 228 printf("net_open: BOOTP failed, trying RARP/RPC...\n"); 229#endif 230 231 /* 232 * Use RARP to get our IP address. This also sets our 233 * netmask to the "natural" default for our address. 234 */ 235 if (rarp_getipaddress(sock)) { 236 printf("net_open: RARP failed\n"); 237 return (EIO); 238 } 239 printf("net_open: client addr: %s\n", inet_ntoa(myip)); 240 241 /* Get our hostname, server IP address, gateway. */ 242 if (bp_whoami(sock)) { 243 printf("net_open: bootparam/whoami RPC failed\n"); 244 return (EIO); 245 } 246 printf("net_open: client name: %s\n", hostname); 247 248 /* 249 * Ignore the gateway from whoami (unreliable). 250 * Use the "gateway" parameter instead. 251 */ 252 smask = 0; 253 gateip.s_addr = 0; 254 if (bp_getfile(sock, "gateway", &gateip, buf) == 0) { 255 /* Got it! Parse the netmask. */ 256 smask = ip_convertaddr(buf); 257 } 258 if (smask) { 259 netmask = smask; 260 printf("net_open: subnet mask: %s\n", intoa(netmask)); 261 } 262 if (gateip.s_addr) 263 printf("net_open: net gateway: %s\n", inet_ntoa(gateip)); 264 265 /* Get the root server and pathname. */ 266 if (bp_getfile(sock, "root", &rootip, rootpath)) { 267 printf("net_open: bootparam/getfile RPC failed\n"); 268 return (EIO); 269 } 270 exit: 271 printf("net_open: server addr: %s\n", inet_ntoa(rootip)); 272 273 /* 274 * If present, strip the server's address off of the rootpath 275 * before passing it along. This allows us to be compatible with 276 * the kernel's diskless (BOOTP_NFSROOT) booting conventions 277 */ 278 279 for(i=0; i<FNAME_SIZE; i++) 280 if(rootpath[i] == ':') 281 break; 282 if(i && i != FNAME_SIZE) { 283 i++; 284 bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1); 285 bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1); 286 } 287 printf("net_open: server path: %s\n", rootpath); 288 289 d = socktodesc(sock); 290 sprintf(temp, "%6D", d->myea, ":"); 291 setenv("boot.netif.ip", inet_ntoa(myip), 1); 292 setenv("boot.netif.netmask", intoa(netmask), 1); 293 setenv("boot.netif.gateway", inet_ntoa(gateip), 1); 294 setenv("boot.netif.hwaddr", temp, 1); 295 296 return (0); 297} 298 299static void 300net_print(int verbose) 301{ 302 return; 303} 304