1 /* $NetBSD: dev_net.c,v 1.6 1997/09/06 14:08:31 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 #include "dev_net.h" 64 65 #ifndef SUN_BOOTPARAMS 66 void bootp __P((int)); 67 #endif 68 69 extern int debug; 70 extern int nfs_root_node[]; /* XXX - get from nfs_mount() */ 71 72 /* 73 * Various globals needed by the network code: 74 */ 75 76 #if 0 77 /* for arp.c, rarp.c */ 78 u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 79 #endif 80 81 struct in_addr myip; /* my ip address */ 82 struct in_addr rootip; /* root ip address */ 83 struct in_addr gateip; /* swap ip address */ 84 n_long netmask; /* subnet or net mask */ 85 86 char rootpath[FNAME_SIZE]; 87 88 int hostnamelen; 89 char hostname[FNAME_SIZE]; 90 91 int domainnamelen; 92 char domainname[FNAME_SIZE]; 93 94 /* 95 * Local things... 96 */ 97 static int netdev_sock = -1; 98 static int netdev_opens; 99 100 int net_getparams __P((int)); 101 102 /* 103 * Called by devopen after it sets f->f_dev to our devsw entry. 104 * This opens the low-level device and sets f->f_devdata. 105 * This is declared with variable arguments... 106 */ 107 int 108 net_open(struct open_file *f, ...) 109 { 110 va_list ap; 111 char *devname; /* Device part of file name (or NULL). */ 112 int error = 0; 113 114 va_start(ap, f); 115 devname = va_arg(ap, char*); 116 va_end(ap); 117 118 #ifdef NETIF_DEBUG 119 if (debug) 120 printf("net_open: %s\n", devname); 121 #endif 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 goto fail; 141 } 142 /* Get the NFS file handle (mountd). */ 143 error = nfs_mount(netdev_sock, rootip, rootpath); 144 if (error) { 145 printf("net_open: NFS mount error=%d\n", error); 146 rootip.s_addr = 0; 147 fail: 148 netif_close(netdev_sock); 149 netdev_sock = -1; 150 return (error); 151 } 152 if (debug) 153 printf("net_open: NFS mount succeeded\n"); 154 } 155 } 156 netdev_opens++; 157 f->f_devdata = nfs_root_node; 158 return (error); 159 } 160 161 int 162 net_close(f) 163 struct open_file *f; 164 { 165 166 #ifdef NETIF_DEBUG 167 if (debug) 168 printf("net_close: opens=%d\n", netdev_opens); 169 #endif 170 171 /* On last close, do netif close, etc. */ 172 f->f_devdata = NULL; 173 /* Extra close call? */ 174 if (netdev_opens <= 0) 175 return (0); 176 netdev_opens--; 177 /* Not last close? */ 178 if (netdev_opens > 0) 179 return(0); 180 rootip.s_addr = 0; 181 if (netdev_sock >= 0) { 182 if (debug) 183 printf("net_close: calling netif_close()\n"); 184 netif_close(netdev_sock); 185 netdev_sock = -1; 186 } 187 return (0); 188 } 189 190 int 191 net_ioctl() 192 { 193 return EIO; 194 } 195 196 int 197 net_strategy() 198 { 199 return EIO; 200 } 201 202 int 203 net_getparams(sock) 204 int sock; 205 { 206 /* 207 * Get info for NFS boot: our IP address, our hostname, 208 * server IP address, and our root path on the server. 209 * There are two ways to do this: The old, Sun way, 210 * and the more modern, BOOTP way. (RFC951, RFC1048) 211 */ 212 213 #ifdef SUN_BOOTPARAMS 214 /* Get our IP address. (rarp.c) */ 215 if (rarp_getipaddress(sock)) { 216 printf("net_open: RARP failed\n"); 217 return (EIO); 218 } 219 #else /* BOOTPARAMS */ 220 /* 221 * Get boot info using BOOTP. (RFC951, RFC1048) 222 * This also gets the server IP address, gateway, 223 * root path, etc. 224 */ 225 bootp(sock); 226 if (myip.s_addr == 0) { 227 printf("net_open: BOOTP failed\n"); 228 return (EIO); 229 } 230 #endif /* BOOTPARAMS */ 231 232 printf("boot: client addr: %s\n", inet_ntoa(myip)); 233 234 #ifdef SUN_BOOTPARAMS 235 /* Get our hostname, server IP address, gateway. */ 236 if (bp_whoami(sock)) { 237 printf("net_open: bootparam/whoami RPC failed\n"); 238 return (EIO); 239 } 240 #endif /* BOOTPARAMS */ 241 242 printf("boot: client name: %s\n", hostname); 243 if (gateip.s_addr) { 244 printf("boot: subnet mask: %s\n", intoa(netmask)); 245 printf("boot: net gateway: %s\n", inet_ntoa(gateip)); 246 } 247 248 #ifdef SUN_BOOTPARAMS 249 /* Get the root pathname. */ 250 if (bp_getfile(sock, "root", &rootip, rootpath)) { 251 printf("net_open: bootparam/getfile RPC failed\n"); 252 return (EIO); 253 } 254 #endif /* BOOTPARAMS */ 255 256 printf("boot: server addr: %s\n", inet_ntoa(rootip)); 257 printf("boot: server path: %s\n", rootpath); 258 259 return (0); 260 } 261