1 /* $NetBSD: dev_net.c,v 1.4 1996/01/29 23:54:15 gwr 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 <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/if_ether.h> 57 #include <netinet/in_systm.h> 58 59 #include "stand.h" 60 #include "net.h" 61 #include "netif.h" 62 #include "bootparam.h" 63 #include "dev_net.h" 64 65 extern int debug; 66 extern int nfs_root_node[]; /* XXX - get from nfs_mount() */ 67 68 /* 69 * Various globals needed by the network code: 70 */ 71 72 /* for arp.c, rarp.c */ 73 u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 74 75 struct in_addr myip; /* my ip address */ 76 struct in_addr rootip; /* root ip address */ 77 struct in_addr gateip; /* swap ip address */ 78 n_long netmask; /* subnet or net mask */ 79 80 char rootpath[FNAME_SIZE]; 81 82 int hostnamelen; 83 char hostname[FNAME_SIZE]; 84 85 int domainnamelen; 86 char domainname[FNAME_SIZE]; 87 88 /* 89 * Local things... 90 */ 91 static int netdev_sock = -1; 92 static int netdev_opens; 93 94 /* 95 * Called by devopen after it sets f->f_dev to our devsw entry. 96 * This opens the low-level device and sets f->f_devdata. 97 * This is declared with variable arguments... 98 */ 99 int 100 net_open(struct open_file *f, ...) 101 { 102 va_list ap; 103 char *devname; /* Device part of file name (or NULL). */ 104 int error = 0; 105 106 va_start(ap, f); 107 devname = va_arg(ap, char*); 108 va_end(ap); 109 110 #ifdef NETIF_DEBUG 111 if (debug) 112 printf("net_open: %s\n", devname); 113 #endif 114 115 /* On first open, do netif open, mount, etc. */ 116 if (netdev_opens == 0) { 117 /* Find network interface. */ 118 if (netdev_sock < 0) { 119 netdev_sock = netif_open(devname); 120 if (netdev_sock < 0) { 121 printf("net_open: netif_open() failed\n"); 122 return (ENXIO); 123 } 124 if (debug) 125 printf("net_open: netif_open() succeeded\n"); 126 } 127 if (rootip.s_addr == 0) { 128 /* Get root IP address, and path, etc. */ 129 error = net_getparams(netdev_sock); 130 if (error) { 131 /* getparams makes its own noise */ 132 goto fail; 133 } 134 /* Get the NFS file handle (mountd). */ 135 error = nfs_mount(netdev_sock, rootip, rootpath); 136 if (error) { 137 printf("net_open: NFS mount error=%d\n", error); 138 rootip.s_addr = 0; 139 fail: 140 netif_close(netdev_sock); 141 netdev_sock = -1; 142 return (error); 143 } 144 if (debug) 145 printf("net_open: NFS mount succeeded\n"); 146 } 147 } 148 netdev_opens++; 149 f->f_devdata = nfs_root_node; 150 return (error); 151 } 152 153 int 154 net_close(f) 155 struct open_file *f; 156 { 157 158 #ifdef NETIF_DEBUG 159 if (debug) 160 printf("net_close: opens=%d\n", netdev_opens); 161 #endif 162 163 /* On last close, do netif close, etc. */ 164 f->f_devdata = NULL; 165 /* Extra close call? */ 166 if (netdev_opens <= 0) 167 return (0); 168 netdev_opens--; 169 /* Not last close? */ 170 if (netdev_opens > 0) 171 return(0); 172 rootip.s_addr = 0; 173 if (netdev_sock >= 0) { 174 if (debug) 175 printf("net_close: calling netif_close()\n"); 176 netif_close(netdev_sock); 177 netdev_sock = -1; 178 } 179 return (0); 180 } 181 182 int 183 net_ioctl() 184 { 185 return EIO; 186 } 187 188 int 189 net_strategy() 190 { 191 return EIO; 192 } 193 194 int 195 net_getparams(sock) 196 int sock; 197 { 198 /* 199 * Get info for NFS boot: our IP address, our hostname, 200 * server IP address, and our root path on the server. 201 * There are two ways to do this: The old, Sun way, 202 * and the more modern, BOOTP way. (RFC951, RFC1048) 203 */ 204 205 #ifdef SUN_BOOTPARAMS 206 /* Get our IP address. (rarp.c) */ 207 if (rarp_getipaddress(sock)) { 208 printf("net_open: RARP failed\n"); 209 return (EIO); 210 } 211 #else /* BOOTPARAMS */ 212 /* 213 * Get boot info using BOOTP. (RFC951, RFC1048) 214 * This also gets the server IP address, gateway, 215 * root path, etc. 216 */ 217 bootp(sock); 218 if (myip.s_addr == 0) { 219 printf("net_open: BOOTP failed\n"); 220 return (EIO); 221 } 222 #endif /* BOOTPARAMS */ 223 224 printf("boot: client addr: %s\n", inet_ntoa(myip)); 225 226 #ifdef SUN_BOOTPARAMS 227 /* Get our hostname, server IP address, gateway. */ 228 if (bp_whoami(sock)) { 229 printf("net_open: bootparam/whoami RPC failed\n"); 230 return (EIO); 231 } 232 #endif /* BOOTPARAMS */ 233 234 printf("boot: client name: %s\n", hostname); 235 if (gateip.s_addr) { 236 printf("boot: subnet mask: %s\n", intoa(netmask)); 237 printf("boot: net gateway: %s\n", inet_ntoa(gateip)); 238 } 239 240 #ifdef SUN_BOOTPARAMS 241 /* Get the root pathname. */ 242 if (bp_getfile(sock, "root", &rootip, rootpath)) { 243 printf("net_open: bootparam/getfile RPC failed\n"); 244 return (EIO); 245 } 246 #endif /* BOOTPARAMS */ 247 248 printf("boot: server addr: %s\n", inet_ntoa(rootip)); 249 printf("boot: server path: %s\n", rootpath); 250 251 return (0); 252 } 253