1 /* $NetBSD: dev_net.c,v 1.4 2009/03/14 15:36:13 dsl 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 <lib/libsa/dev_net.h> 67 68 #ifndef SUN_BOOTPARAMS 69 void bootp(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(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(struct open_file *f) 162 { 163 164 #ifdef NETIF_DEBUG 165 if (debug) 166 printf("net_close: opens=%d\n", netdev_opens); 167 #endif 168 169 /* On last close, do netif close, etc. */ 170 f->f_devdata = NULL; 171 /* Extra close call? */ 172 if (netdev_opens <= 0) 173 return (0); 174 netdev_opens--; 175 /* Not last close? */ 176 if (netdev_opens > 0) 177 return(0); 178 rootip.s_addr = 0; 179 if (netdev_sock >= 0) { 180 if (debug) 181 printf("net_close: calling netif_close()\n"); 182 netif_close(netdev_sock); 183 netdev_sock = -1; 184 } 185 return (0); 186 } 187 188 int 189 net_ioctl(struct open_file *a, u_long b, void *c) 190 { 191 return EIO; 192 } 193 194 int 195 net_strategy(void *a, int b, daddr_t c, size_t d, void *e, size_t *f) 196 { 197 return EIO; 198 } 199 200 int 201 net_getparams(int sock) 202 { 203 /* 204 * Get info for NFS boot: our IP address, our hostname, 205 * server IP address, and our root path on the server. 206 * There are two ways to do this: The old, Sun way, 207 * and the more modern, BOOTP way. (RFC951, RFC1048) 208 */ 209 210 #ifdef SUN_BOOTPARAMS 211 /* Get our IP address. (rarp.c) */ 212 if (rarp_getipaddress(sock)) { 213 printf("net_open: RARP failed\n"); 214 return (EIO); 215 } 216 #else /* BOOTPARAMS */ 217 /* 218 * Get boot info using BOOTP. (RFC951, RFC1048) 219 * This also gets the server IP address, gateway, 220 * root path, etc. 221 */ 222 bootp(sock); 223 if (myip.s_addr == 0) { 224 printf("net_open: BOOTP failed\n"); 225 return (EIO); 226 } 227 #endif /* BOOTPARAMS */ 228 229 printf("boot: client addr: %s\n", inet_ntoa(myip)); 230 231 #ifdef SUN_BOOTPARAMS 232 /* Get our hostname, server IP address, gateway. */ 233 if (bp_whoami(sock)) { 234 printf("net_open: bootparam/whoami RPC failed\n"); 235 return (EIO); 236 } 237 #endif /* BOOTPARAMS */ 238 239 printf("boot: client name: %s\n", hostname); 240 if (gateip.s_addr) { 241 printf("boot: subnet mask: %s\n", intoa(netmask)); 242 printf("boot: net gateway: %s\n", inet_ntoa(gateip)); 243 } 244 245 #ifdef SUN_BOOTPARAMS 246 /* Get the root pathname. */ 247 if (bp_getfile(sock, "root", &rootip, rootpath)) { 248 printf("net_open: bootparam/getfile RPC failed\n"); 249 return (EIO); 250 } 251 #endif /* BOOTPARAMS */ 252 253 printf("boot: server addr: %s\n", inet_ntoa(rootip)); 254 printf("boot: server path: %s\n", rootpath); 255 256 return (0); 257 } 258