dev_net.c revision 1.2.2.2
1 1.2.2.2 simonb /* 2 1.2.2.2 simonb * $NetBSD: dev_net.c,v 1.2.2.2 2006/04/22 11:37:38 simonb Exp $ 3 1.2.2.2 simonb */ 4 1.2.2.2 simonb 5 1.2.2.2 simonb /*- 6 1.2.2.2 simonb * Copyright (c) 1997 The NetBSD Foundation, Inc. 7 1.2.2.2 simonb * All rights reserved. 8 1.2.2.2 simonb * 9 1.2.2.2 simonb * This code is derived from software contributed to The NetBSD Foundation 10 1.2.2.2 simonb * by Gordon W. Ross. 11 1.2.2.2 simonb * 12 1.2.2.2 simonb * Redistribution and use in source and binary forms, with or without 13 1.2.2.2 simonb * modification, are permitted provided that the following conditions 14 1.2.2.2 simonb * are met: 15 1.2.2.2 simonb * 1. Redistributions of source code must retain the above copyright 16 1.2.2.2 simonb * notice, this list of conditions and the following disclaimer. 17 1.2.2.2 simonb * 2. Redistributions in binary form must reproduce the above copyright 18 1.2.2.2 simonb * notice, this list of conditions and the following disclaimer in the 19 1.2.2.2 simonb * documentation and/or other materials provided with the distribution. 20 1.2.2.2 simonb * 3. All advertising materials mentioning features or use of this software 21 1.2.2.2 simonb * must display the following acknowledgement: 22 1.2.2.2 simonb * This product includes software developed by the NetBSD 23 1.2.2.2 simonb * Foundation, Inc. and its contributors. 24 1.2.2.2 simonb * 4. Neither the name of The NetBSD Foundation nor the names of its 25 1.2.2.2 simonb * contributors may be used to endorse or promote products derived 26 1.2.2.2 simonb * from this software without specific prior written permission. 27 1.2.2.2 simonb * 28 1.2.2.2 simonb * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 1.2.2.2 simonb * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 1.2.2.2 simonb * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 1.2.2.2 simonb * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 1.2.2.2 simonb * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 1.2.2.2 simonb * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 1.2.2.2 simonb * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 1.2.2.2 simonb * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 1.2.2.2 simonb * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 1.2.2.2 simonb * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 1.2.2.2 simonb * POSSIBILITY OF SUCH DAMAGE. 39 1.2.2.2 simonb */ 40 1.2.2.2 simonb 41 1.2.2.2 simonb #include <sys/cdefs.h> 42 1.2.2.2 simonb __FBSDID("$FreeBSD$"); 43 1.2.2.2 simonb 44 1.2.2.2 simonb /*- 45 1.2.2.2 simonb * This module implements a "raw device" interface suitable for 46 1.2.2.2 simonb * use by the stand-alone I/O library NFS code. This interface 47 1.2.2.2 simonb * does not support any "block" access, and exists only for the 48 1.2.2.2 simonb * purpose of initializing the network interface, getting boot 49 1.2.2.2 simonb * parameters, and performing the NFS mount. 50 1.2.2.2 simonb * 51 1.2.2.2 simonb * At open time, this does: 52 1.2.2.2 simonb * 53 1.2.2.2 simonb * find interface - netif_open() 54 1.2.2.2 simonb * RARP for IP address - rarp_getipaddress() 55 1.2.2.2 simonb * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...) 56 1.2.2.2 simonb * RPC/mountd - nfs_mount(sock, ip, path) 57 1.2.2.2 simonb * 58 1.2.2.2 simonb * the root file handle from mountd is saved in a global 59 1.2.2.2 simonb * for use by the NFS open code (NFS/lookup). 60 1.2.2.2 simonb */ 61 1.2.2.2 simonb 62 1.2.2.2 simonb #include <machine/stdarg.h> 63 1.2.2.2 simonb #include <sys/param.h> 64 1.2.2.2 simonb #include <sys/socket.h> 65 1.2.2.2 simonb #include <net/if.h> 66 1.2.2.2 simonb #include <netinet/in.h> 67 1.2.2.2 simonb #include <netinet/in_systm.h> 68 1.2.2.2 simonb 69 1.2.2.2 simonb #include <stand.h> 70 1.2.2.2 simonb #include <string.h> 71 1.2.2.2 simonb #include <net.h> 72 1.2.2.2 simonb #include <netif.h> 73 1.2.2.2 simonb #include <bootp.h> 74 1.2.2.2 simonb #include <bootparam.h> 75 1.2.2.2 simonb 76 1.2.2.2 simonb #include "dev_net.h" 77 1.2.2.2 simonb #include "bootstrap.h" 78 1.2.2.2 simonb 79 1.2.2.2 simonb int debug = 0; 80 1.2.2.2 simonb 81 1.2.2.2 simonb static int netdev_sock = -1; 82 1.2.2.2 simonb static int netdev_opens; 83 1.2.2.2 simonb 84 1.2.2.2 simonb static int net_init(void); 85 1.2.2.2 simonb static int net_open(struct open_file *, ...); 86 1.2.2.2 simonb static int net_close(struct open_file *); 87 1.2.2.2 simonb static int net_strategy(); 88 1.2.2.2 simonb static void net_print(int); 89 1.2.2.2 simonb 90 1.2.2.2 simonb static int net_getparams(int sock); 91 1.2.2.2 simonb 92 1.2.2.2 simonb struct devsw netdev = { 93 1.2.2.2 simonb "net", 94 1.2.2.2 simonb DEVT_NET, 95 1.2.2.2 simonb net_init, 96 1.2.2.2 simonb net_strategy, 97 1.2.2.2 simonb net_open, 98 1.2.2.2 simonb net_close, 99 1.2.2.2 simonb noioctl, 100 1.2.2.2 simonb net_print 101 1.2.2.2 simonb }; 102 1.2.2.2 simonb 103 1.2.2.2 simonb int 104 1.2.2.2 simonb net_init(void) 105 1.2.2.2 simonb { 106 1.2.2.2 simonb return 0; 107 1.2.2.2 simonb } 108 1.2.2.2 simonb 109 1.2.2.2 simonb /* 110 1.2.2.2 simonb * Called by devopen after it sets f->f_dev to our devsw entry. 111 1.2.2.2 simonb * This opens the low-level device and sets f->f_devdata. 112 1.2.2.2 simonb * This is declared with variable arguments... 113 1.2.2.2 simonb */ 114 1.2.2.2 simonb int 115 1.2.2.2 simonb net_open(struct open_file *f, ...) 116 1.2.2.2 simonb { 117 1.2.2.2 simonb va_list args; 118 1.2.2.2 simonb char *devname; /* Device part of file name (or NULL). */ 119 1.2.2.2 simonb int error = 0; 120 1.2.2.2 simonb 121 1.2.2.2 simonb va_start(args, f); 122 1.2.2.2 simonb devname = va_arg(args, char*); 123 1.2.2.2 simonb va_end(args); 124 1.2.2.2 simonb 125 1.2.2.2 simonb /* On first open, do netif open, mount, etc. */ 126 1.2.2.2 simonb if (netdev_opens == 0) { 127 1.2.2.2 simonb /* Find network interface. */ 128 1.2.2.2 simonb if (netdev_sock < 0) { 129 1.2.2.2 simonb netdev_sock = netif_open(devname); 130 1.2.2.2 simonb if (netdev_sock < 0) { 131 1.2.2.2 simonb printf("net_open: netif_open() failed\n"); 132 1.2.2.2 simonb return (ENXIO); 133 1.2.2.2 simonb } 134 1.2.2.2 simonb if (debug) 135 1.2.2.2 simonb printf("net_open: netif_open() succeeded\n"); 136 1.2.2.2 simonb } 137 1.2.2.2 simonb if (rootip.s_addr == 0) { 138 1.2.2.2 simonb /* Get root IP address, and path, etc. */ 139 1.2.2.2 simonb error = net_getparams(netdev_sock); 140 1.2.2.2 simonb if (error) { 141 1.2.2.2 simonb /* getparams makes its own noise */ 142 1.2.2.2 simonb netif_close(netdev_sock); 143 1.2.2.2 simonb netdev_sock = -1; 144 1.2.2.2 simonb return (error); 145 1.2.2.2 simonb } 146 1.2.2.2 simonb } 147 1.2.2.2 simonb netdev_opens++; 148 1.2.2.2 simonb } 149 1.2.2.2 simonb netdev_opens++; 150 1.2.2.2 simonb f->f_devdata = &netdev_sock; 151 1.2.2.2 simonb return (error); 152 1.2.2.2 simonb } 153 1.2.2.2 simonb 154 1.2.2.2 simonb int 155 1.2.2.2 simonb net_close(f) 156 1.2.2.2 simonb struct open_file *f; 157 1.2.2.2 simonb { 158 1.2.2.2 simonb 159 1.2.2.2 simonb #ifdef NETIF_DEBUG 160 1.2.2.2 simonb if (debug) 161 1.2.2.2 simonb printf("net_close: opens=%d\n", netdev_opens); 162 1.2.2.2 simonb #endif 163 1.2.2.2 simonb 164 1.2.2.2 simonb /* On last close, do netif close, etc. */ 165 1.2.2.2 simonb f->f_devdata = NULL; 166 1.2.2.2 simonb /* Extra close call? */ 167 1.2.2.2 simonb if (netdev_opens <= 0) 168 1.2.2.2 simonb return (0); 169 1.2.2.2 simonb netdev_opens--; 170 1.2.2.2 simonb /* Not last close? */ 171 1.2.2.2 simonb if (netdev_opens > 0) 172 1.2.2.2 simonb return(0); 173 1.2.2.2 simonb rootip.s_addr = 0; 174 1.2.2.2 simonb if (netdev_sock >= 0) { 175 1.2.2.2 simonb if (debug) 176 1.2.2.2 simonb printf("net_close: calling netif_close()\n"); 177 1.2.2.2 simonb netif_close(netdev_sock); 178 1.2.2.2 simonb netdev_sock = -1; 179 1.2.2.2 simonb } 180 1.2.2.2 simonb return (0); 181 1.2.2.2 simonb } 182 1.2.2.2 simonb 183 1.2.2.2 simonb int 184 1.2.2.2 simonb net_strategy() 185 1.2.2.2 simonb { 186 1.2.2.2 simonb return EIO; 187 1.2.2.2 simonb } 188 1.2.2.2 simonb 189 1.2.2.2 simonb #define SUPPORT_BOOTP 190 1.2.2.2 simonb 191 1.2.2.2 simonb /* 192 1.2.2.2 simonb * Get info for NFS boot: our IP address, our hostname, 193 1.2.2.2 simonb * server IP address, and our root path on the server. 194 1.2.2.2 simonb * There are two ways to do this: The old, Sun way, 195 1.2.2.2 simonb * and the more modern, BOOTP way. (RFC951, RFC1048) 196 1.2.2.2 simonb * 197 1.2.2.2 simonb * The default is to use the Sun bootparams RPC 198 1.2.2.2 simonb * (because that is what the kernel will do). 199 1.2.2.2 simonb * MD code can make try_bootp initialied data, 200 1.2.2.2 simonb * which will override this common definition. 201 1.2.2.2 simonb */ 202 1.2.2.2 simonb #ifdef SUPPORT_BOOTP 203 1.2.2.2 simonb int try_bootp = 1; 204 1.2.2.2 simonb #endif 205 1.2.2.2 simonb 206 1.2.2.2 simonb extern n_long ip_convertaddr(char *p); 207 1.2.2.2 simonb 208 1.2.2.2 simonb static int 209 1.2.2.2 simonb net_getparams(sock) 210 1.2.2.2 simonb int sock; 211 1.2.2.2 simonb { 212 1.2.2.2 simonb char buf[MAXHOSTNAMELEN]; 213 1.2.2.2 simonb char temp[FNAME_SIZE]; 214 1.2.2.2 simonb struct iodesc *d; 215 1.2.2.2 simonb int i; 216 1.2.2.2 simonb n_long smask; 217 1.2.2.2 simonb 218 1.2.2.2 simonb #ifdef SUPPORT_BOOTP 219 1.2.2.2 simonb /* 220 1.2.2.2 simonb * Try to get boot info using BOOTP. If we succeed, then 221 1.2.2.2 simonb * the server IP address, gateway, and root path will all 222 1.2.2.2 simonb * be initialized. If any remain uninitialized, we will 223 1.2.2.2 simonb * use RARP and RPC/bootparam (the Sun way) to get them. 224 1.2.2.2 simonb */ 225 1.2.2.2 simonb if (try_bootp) 226 1.2.2.2 simonb bootp(sock, BOOTP_NONE); 227 1.2.2.2 simonb if (myip.s_addr != 0) 228 1.2.2.2 simonb goto exit; 229 1.2.2.2 simonb if (debug) 230 1.2.2.2 simonb printf("net_open: BOOTP failed, trying RARP/RPC...\n"); 231 1.2.2.2 simonb #endif 232 1.2.2.2 simonb 233 1.2.2.2 simonb /* 234 1.2.2.2 simonb * Use RARP to get our IP address. This also sets our 235 1.2.2.2 simonb * netmask to the "natural" default for our address. 236 1.2.2.2 simonb */ 237 1.2.2.2 simonb if (rarp_getipaddress(sock)) { 238 1.2.2.2 simonb printf("net_open: RARP failed\n"); 239 1.2.2.2 simonb return (EIO); 240 1.2.2.2 simonb } 241 1.2.2.2 simonb printf("net_open: client addr: %s\n", inet_ntoa(myip)); 242 1.2.2.2 simonb 243 1.2.2.2 simonb /* Get our hostname, server IP address, gateway. */ 244 1.2.2.2 simonb if (bp_whoami(sock)) { 245 1.2.2.2 simonb printf("net_open: bootparam/whoami RPC failed\n"); 246 1.2.2.2 simonb return (EIO); 247 1.2.2.2 simonb } 248 1.2.2.2 simonb printf("net_open: client name: %s\n", hostname); 249 1.2.2.2 simonb 250 1.2.2.2 simonb /* 251 1.2.2.2 simonb * Ignore the gateway from whoami (unreliable). 252 1.2.2.2 simonb * Use the "gateway" parameter instead. 253 1.2.2.2 simonb */ 254 1.2.2.2 simonb smask = 0; 255 1.2.2.2 simonb gateip.s_addr = 0; 256 1.2.2.2 simonb if (bp_getfile(sock, "gateway", &gateip, buf) == 0) { 257 1.2.2.2 simonb /* Got it! Parse the netmask. */ 258 1.2.2.2 simonb smask = ip_convertaddr(buf); 259 1.2.2.2 simonb } 260 1.2.2.2 simonb if (smask) { 261 1.2.2.2 simonb netmask = smask; 262 1.2.2.2 simonb printf("net_open: subnet mask: %s\n", intoa(netmask)); 263 1.2.2.2 simonb } 264 1.2.2.2 simonb if (gateip.s_addr) 265 1.2.2.2 simonb printf("net_open: net gateway: %s\n", inet_ntoa(gateip)); 266 1.2.2.2 simonb 267 1.2.2.2 simonb /* Get the root server and pathname. */ 268 1.2.2.2 simonb if (bp_getfile(sock, "root", &rootip, rootpath)) { 269 1.2.2.2 simonb printf("net_open: bootparam/getfile RPC failed\n"); 270 1.2.2.2 simonb return (EIO); 271 1.2.2.2 simonb } 272 1.2.2.2 simonb exit: 273 1.2.2.2 simonb /* 274 1.2.2.2 simonb * If present, strip the server's address off of the rootpath 275 1.2.2.2 simonb * before passing it along. This allows us to be compatible with 276 1.2.2.2 simonb * the kernel's diskless (BOOTP_NFSROOT) booting conventions 277 1.2.2.2 simonb */ 278 1.2.2.2 simonb for (i = 0; rootpath[i] != '\0' && i < FNAME_SIZE; i++) 279 1.2.2.2 simonb if (rootpath[i] == ':') 280 1.2.2.2 simonb break; 281 1.2.2.2 simonb if (i && i != FNAME_SIZE && rootpath[i] == ':') { 282 1.2.2.2 simonb rootpath[i++] = '\0'; 283 1.2.2.2 simonb if (inet_addr(&rootpath[0]) != INADDR_NONE) 284 1.2.2.2 simonb rootip.s_addr = inet_addr(&rootpath[0]); 285 1.2.2.2 simonb bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1); 286 1.2.2.2 simonb bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1); 287 1.2.2.2 simonb } 288 1.2.2.2 simonb printf("net_open: server addr: %s\n", inet_ntoa(rootip)); 289 1.2.2.2 simonb printf("net_open: server path: %s\n", rootpath); 290 1.2.2.2 simonb 291 1.2.2.2 simonb d = socktodesc(sock); 292 1.2.2.2 simonb sprintf(temp, "%6D", d->myea, ":"); 293 1.2.2.2 simonb setenv("boot.netif.ip", inet_ntoa(myip), 1); 294 1.2.2.2 simonb setenv("boot.netif.netmask", intoa(netmask), 1); 295 1.2.2.2 simonb setenv("boot.netif.gateway", inet_ntoa(gateip), 1); 296 1.2.2.2 simonb setenv("boot.netif.hwaddr", temp, 1); 297 1.2.2.2 simonb setenv("boot.nfsroot.server", inet_ntoa(rootip), 1); 298 1.2.2.2 simonb setenv("boot.nfsroot.path", rootpath, 1); 299 1.2.2.2 simonb 300 1.2.2.2 simonb return (0); 301 1.2.2.2 simonb } 302 1.2.2.2 simonb 303 1.2.2.2 simonb static void 304 1.2.2.2 simonb net_print(int verbose) 305 1.2.2.2 simonb { 306 1.2.2.2 simonb return; 307 1.2.2.2 simonb } 308
Indexes created Tue Sep 30 11:09:46 GMT 2025