1 /* $NetBSD: dev_net.c,v 1.12 2003/03/19 17:21:41 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 <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 char hostname[FNAME_SIZE]; 91 92 /* 93 * Local things... 94 */ 95 static int netdev_sock = -1; 96 static int netdev_opens; 97 98 int net_getparams __P((int)); 99 100 /* 101 * Called by devopen after it sets f->f_dev to our devsw entry. 102 * This opens the low-level device and sets f->f_devdata. 103 * This is declared with variable arguments... 104 */ 105 int 106 net_open(struct open_file *f, ...) 107 { 108 va_list ap; 109 char *devname; /* Device part of file name (or NULL). */ 110 int error = 0; 111 112 va_start(ap, f); 113 devname = va_arg(ap, char*); 114 va_end(ap); 115 116 #ifdef NETIF_DEBUG 117 if (debug) 118 printf("net_open: %s\n", devname); 119 #endif 120 121 /* On first open, do netif open, mount, etc. */ 122 if (netdev_opens == 0) { 123 /* Find network interface. */ 124 if (netdev_sock < 0) { 125 netdev_sock = netif_open(devname); 126 if (netdev_sock < 0) { 127 printf("net_open: netif_open() failed\n"); 128 return (ENXIO); 129 } 130 if (debug) 131 printf("net_open: netif_open() succeeded\n"); 132 } 133 if (rootip.s_addr == 0) { 134 /* Get root IP address, and path, etc. */ 135 error = net_getparams(netdev_sock); 136 if (error) { 137 /* getparams makes its own noise */ 138 goto fail; 139 } 140 /* Get the NFS file handle (mountd). */ 141 error = nfs_mount(netdev_sock, rootip, rootpath); 142 if (error) { 143 error = errno; 144 printf("net_open: NFS mount error=%d\n", error); 145 rootip.s_addr = 0; 146 fail: 147 netif_close(netdev_sock); 148 netdev_sock = -1; 149 return (error); 150 } 151 if (debug) 152 printf("net_open: NFS mount succeeded\n"); 153 } 154 } 155 netdev_opens++; 156 f->f_devdata = nfs_root_node; 157 return (error); 158 } 159 160 int 161 net_close(f) 162 struct open_file *f; 163 { 164 165 #ifdef NETIF_DEBUG 166 if (debug) 167 printf("net_close: opens=%d\n", netdev_opens); 168 #endif 169 170 /* On last close, do netif close, etc. */ 171 f->f_devdata = NULL; 172 /* Extra close call? */ 173 if (netdev_opens <= 0) 174 return (0); 175 netdev_opens--; 176 /* Not last close? */ 177 if (netdev_opens > 0) 178 return(0); 179 rootip.s_addr = 0; 180 if (netdev_sock >= 0) { 181 if (debug) 182 printf("net_close: calling netif_close()\n"); 183 netif_close(netdev_sock); 184 netdev_sock = -1; 185 } 186 return (0); 187 } 188 189 int 190 net_ioctl(f, cmd, data) 191 struct open_file *f; 192 u_long cmd; 193 void *data; 194 { 195 return EIO; 196 } 197 198 int 199 net_strategy(devdata, rw, blk, size, buf, rsize) 200 void *devdata; 201 int rw; 202 daddr_t blk; 203 size_t size; 204 void *buf; 205 size_t *rsize; 206 { 207 return EIO; 208 } 209 210 int 211 net_getparams(sock) 212 int sock; 213 { 214 /* 215 * Get info for NFS boot: our IP address, our hostname, 216 * server IP address, and our root path on the server. 217 * There are two ways to do this: The old, Sun way, 218 * and the more modern, BOOTP way. (RFC951, RFC1048) 219 */ 220 221 #ifdef SUN_BOOTPARAMS 222 /* Get our IP address. (rarp.c) */ 223 if (rarp_getipaddress(sock)) { 224 printf("net_open: RARP failed\n"); 225 return (EIO); 226 } 227 #else /* BOOTPARAMS */ 228 /* 229 * Get boot info using BOOTP. (RFC951, RFC1048) 230 * This also gets the server IP address, gateway, 231 * root path, etc. 232 */ 233 bootp(sock); 234 if (myip.s_addr == 0) { 235 printf("net_open: BOOTP failed\n"); 236 return (EIO); 237 } 238 #endif /* BOOTPARAMS */ 239 240 printf("boot: client addr: %s\n", inet_ntoa(myip)); 241 242 #ifdef SUN_BOOTPARAMS 243 /* Get our hostname, server IP address, gateway. */ 244 if (bp_whoami(sock)) { 245 printf("net_open: bootparam/whoami RPC failed\n"); 246 return (EIO); 247 } 248 #endif /* BOOTPARAMS */ 249 250 printf("boot: client name: %s\n", hostname); 251 if (gateip.s_addr) { 252 printf("boot: subnet mask: %s\n", intoa(netmask)); 253 printf("boot: net gateway: %s\n", inet_ntoa(gateip)); 254 } 255 256 #ifdef SUN_BOOTPARAMS 257 /* Get the root pathname. */ 258 if (bp_getfile(sock, "root", &rootip, rootpath)) { 259 printf("net_open: bootparam/getfile RPC failed\n"); 260 return (EIO); 261 } 262 #endif /* BOOTPARAMS */ 263 264 printf("boot: server addr: %s\n", inet_ntoa(rootip)); 265 printf("boot: server path: %s\n", rootpath); 266 267 return (0); 268 } 269