1 /* $NetBSD: dev_net.c,v 1.11 2002/11/09 06:34:38 thorpej 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 <machine/stdarg.h> 52 #include <sys/param.h> 53 #include <sys/socket.h> 54 #include <net/if.h> 55 #include <netinet/in.h> 56 #include <netinet/in_systm.h> 57 58 #include <lib/libsa/stand.h> 59 #include <lib/libsa/net.h> 60 #include <lib/libsa/netif.h> 61 #include <lib/libsa/bootparam.h> 62 #include <lib/libsa/nfs.h> 63 64 #include <lib/libkern/libkern.h> 65 66 #include "dev_net.h" 67 68 #ifndef SUN_BOOTPARAMS 69 void bootp __P((int)); 70 #endif 71 72 extern int debug; 73 extern int nfs_root_node[]; /* XXX - get from nfs_mount() */ 74 75 /* 76 * Various globals needed by the network code: 77 */ 78 79 #if 0 80 /* for arp.c, rarp.c */ 81 u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 82 #endif 83 84 struct in_addr myip; /* my ip address */ 85 struct in_addr rootip; /* root ip address */ 86 struct in_addr gateip; /* swap ip address */ 87 n_long netmask; /* subnet or net mask */ 88 89 char rootpath[FNAME_SIZE]; 90 91 int hostnamelen; 92 char hostname[FNAME_SIZE]; 93 94 int domainnamelen; 95 char domainname[FNAME_SIZE]; 96 97 /* 98 * Local things... 99 */ 100 static int netdev_sock = -1; 101 static int netdev_opens; 102 103 int net_getparams __P((int)); 104 105 /* 106 * Called by devopen after it sets f->f_dev to our devsw entry. 107 * This opens the low-level device and sets f->f_devdata. 108 * This is declared with variable arguments... 109 */ 110 int 111 net_open(struct open_file *f, ...) 112 { 113 va_list ap; 114 char *devname; /* Device part of file name (or NULL). */ 115 int error = 0; 116 117 va_start(ap, f); 118 devname = va_arg(ap, char*); 119 va_end(ap); 120 121 #ifdef NETIF_DEBUG 122 if (debug) 123 printf("net_open: %s\n", devname); 124 #endif 125 126 /* On first open, do netif open, mount, etc. */ 127 if (netdev_opens == 0) { 128 /* Find network interface. */ 129 if (netdev_sock < 0) { 130 netdev_sock = netif_open(devname); 131 if (netdev_sock < 0) { 132 printf("net_open: netif_open() failed\n"); 133 return (ENXIO); 134 } 135 if (debug) 136 printf("net_open: netif_open() succeeded\n"); 137 } 138 if (rootip.s_addr == 0) { 139 /* Get root IP address, and path, etc. */ 140 error = net_getparams(netdev_sock); 141 if (error) { 142 /* getparams makes its own noise */ 143 goto fail; 144 } 145 /* Get the NFS file handle (mountd). */ 146 error = nfs_mount(netdev_sock, rootip, rootpath); 147 if (error) { 148 error = errno; 149 printf("net_open: NFS mount error=%d\n", error); 150 rootip.s_addr = 0; 151 fail: 152 netif_close(netdev_sock); 153 netdev_sock = -1; 154 return (error); 155 } 156 if (debug) 157 printf("net_open: NFS mount succeeded\n"); 158 } 159 } 160 netdev_opens++; 161 f->f_devdata = nfs_root_node; 162 return (error); 163 } 164 165 int 166 net_close(f) 167 struct open_file *f; 168 { 169 170 #ifdef NETIF_DEBUG 171 if (debug) 172 printf("net_close: opens=%d\n", netdev_opens); 173 #endif 174 175 /* On last close, do netif close, etc. */ 176 f->f_devdata = NULL; 177 /* Extra close call? */ 178 if (netdev_opens <= 0) 179 return (0); 180 netdev_opens--; 181 /* Not last close? */ 182 if (netdev_opens > 0) 183 return(0); 184 rootip.s_addr = 0; 185 if (netdev_sock >= 0) { 186 if (debug) 187 printf("net_close: calling netif_close()\n"); 188 netif_close(netdev_sock); 189 netdev_sock = -1; 190 } 191 return (0); 192 } 193 194 int 195 net_ioctl(f, cmd, data) 196 struct open_file *f; 197 u_long cmd; 198 void *data; 199 { 200 return EIO; 201 } 202 203 int 204 net_strategy(devdata, rw, blk, size, buf, rsize) 205 void *devdata; 206 int rw; 207 daddr_t blk; 208 size_t size; 209 void *buf; 210 size_t *rsize; 211 { 212 return EIO; 213 } 214 215 int 216 net_getparams(sock) 217 int sock; 218 { 219 /* 220 * Get info for NFS boot: our IP address, our hostname, 221 * server IP address, and our root path on the server. 222 * There are two ways to do this: The old, Sun way, 223 * and the more modern, BOOTP way. (RFC951, RFC1048) 224 */ 225 226 #ifdef SUN_BOOTPARAMS 227 /* Get our IP address. (rarp.c) */ 228 if (rarp_getipaddress(sock)) { 229 printf("net_open: RARP failed\n"); 230 return (EIO); 231 } 232 #else /* BOOTPARAMS */ 233 /* 234 * Get boot info using BOOTP. (RFC951, RFC1048) 235 * This also gets the server IP address, gateway, 236 * root path, etc. 237 */ 238 bootp(sock); 239 if (myip.s_addr == 0) { 240 printf("net_open: BOOTP failed\n"); 241 return (EIO); 242 } 243 #endif /* BOOTPARAMS */ 244 245 printf("boot: client addr: %s\n", inet_ntoa(myip)); 246 247 #ifdef SUN_BOOTPARAMS 248 /* Get our hostname, server IP address, gateway. */ 249 if (bp_whoami(sock)) { 250 printf("net_open: bootparam/whoami RPC failed\n"); 251 return (EIO); 252 } 253 #endif /* BOOTPARAMS */ 254 255 printf("boot: client name: %s\n", hostname); 256 if (gateip.s_addr) { 257 printf("boot: subnet mask: %s\n", intoa(netmask)); 258 printf("boot: net gateway: %s\n", inet_ntoa(gateip)); 259 } 260 261 #ifdef SUN_BOOTPARAMS 262 /* Get the root pathname. */ 263 if (bp_getfile(sock, "root", &rootip, rootpath)) { 264 printf("net_open: bootparam/getfile RPC failed\n"); 265 return (EIO); 266 } 267 #endif /* BOOTPARAMS */ 268 269 printf("boot: server addr: %s\n", inet_ntoa(rootip)); 270 printf("boot: server path: %s\n", rootpath); 271 272 return (0); 273 } 274