dev_net.c revision 1.1.2.2
1 1.1.2.2 yamt /* 2 1.1.2.2 yamt * $NetBSD: dev_net.c,v 1.1.2.2 2006/04/11 11:53:40 yamt Exp $ 3 1.1.2.2 yamt */ 4 1.1.2.2 yamt 5 1.1.2.2 yamt /*- 6 1.1.2.2 yamt * Copyright (c) 1997 The NetBSD Foundation, Inc. 7 1.1.2.2 yamt * All rights reserved. 8 1.1.2.2 yamt * 9 1.1.2.2 yamt * This code is derived from software contributed to The NetBSD Foundation 10 1.1.2.2 yamt * by Gordon W. Ross. 11 1.1.2.2 yamt * 12 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 13 1.1.2.2 yamt * modification, are permitted provided that the following conditions 14 1.1.2.2 yamt * are met: 15 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 16 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 17 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 18 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 19 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 20 1.1.2.2 yamt * 3. All advertising materials mentioning features or use of this software 21 1.1.2.2 yamt * must display the following acknowledgement: 22 1.1.2.2 yamt * This product includes software developed by the NetBSD 23 1.1.2.2 yamt * Foundation, Inc. and its contributors. 24 1.1.2.2 yamt * 4. Neither the name of The NetBSD Foundation nor the names of its 25 1.1.2.2 yamt * contributors may be used to endorse or promote products derived 26 1.1.2.2 yamt * from this software without specific prior written permission. 27 1.1.2.2 yamt * 28 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 1.1.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 1.1.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 1.1.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 1.1.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 1.1.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 1.1.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 1.1.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 1.1.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 1.1.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 1.1.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 39 1.1.2.2 yamt */ 40 1.1.2.2 yamt 41 1.1.2.2 yamt #include <sys/cdefs.h> 42 1.1.2.2 yamt __FBSDID("$FreeBSD$"); 43 1.1.2.2 yamt 44 1.1.2.2 yamt /*- 45 1.1.2.2 yamt * This module implements a "raw device" interface suitable for 46 1.1.2.2 yamt * use by the stand-alone I/O library NFS code. This interface 47 1.1.2.2 yamt * does not support any "block" access, and exists only for the 48 1.1.2.2 yamt * purpose of initializing the network interface, getting boot 49 1.1.2.2 yamt * parameters, and performing the NFS mount. 50 1.1.2.2 yamt * 51 1.1.2.2 yamt * At open time, this does: 52 1.1.2.2 yamt * 53 1.1.2.2 yamt * find interface - netif_open() 54 1.1.2.2 yamt * RARP for IP address - rarp_getipaddress() 55 1.1.2.2 yamt * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...) 56 1.1.2.2 yamt * RPC/mountd - nfs_mount(sock, ip, path) 57 1.1.2.2 yamt * 58 1.1.2.2 yamt * the root file handle from mountd is saved in a global 59 1.1.2.2 yamt * for use by the NFS open code (NFS/lookup). 60 1.1.2.2 yamt */ 61 1.1.2.2 yamt 62 1.1.2.2 yamt #include <machine/stdarg.h> 63 1.1.2.2 yamt #include <sys/param.h> 64 1.1.2.2 yamt #include <sys/socket.h> 65 1.1.2.2 yamt #include <net/if.h> 66 1.1.2.2 yamt #include <netinet/in.h> 67 1.1.2.2 yamt #include <netinet/in_systm.h> 68 1.1.2.2 yamt 69 1.1.2.2 yamt #include <stand.h> 70 1.1.2.2 yamt #include <string.h> 71 1.1.2.2 yamt #include <net.h> 72 1.1.2.2 yamt #include <netif.h> 73 1.1.2.2 yamt #include <bootp.h> 74 1.1.2.2 yamt #include <bootparam.h> 75 1.1.2.2 yamt 76 1.1.2.2 yamt #include "dev_net.h" 77 1.1.2.2 yamt #include "bootstrap.h" 78 1.1.2.2 yamt 79 1.1.2.2 yamt int debug = 0; 80 1.1.2.2 yamt 81 1.1.2.2 yamt static int netdev_sock = -1; 82 1.1.2.2 yamt static int netdev_opens; 83 1.1.2.2 yamt 84 1.1.2.2 yamt static int net_init(void); 85 1.1.2.2 yamt static int net_open(struct open_file *, ...); 86 1.1.2.2 yamt static int net_close(struct open_file *); 87 1.1.2.2 yamt static int net_strategy(); 88 1.1.2.2 yamt static void net_print(int); 89 1.1.2.2 yamt 90 1.1.2.2 yamt static int net_getparams(int sock); 91 1.1.2.2 yamt 92 1.1.2.2 yamt struct devsw netdev = { 93 1.1.2.2 yamt "net", 94 1.1.2.2 yamt DEVT_NET, 95 1.1.2.2 yamt net_init, 96 1.1.2.2 yamt net_strategy, 97 1.1.2.2 yamt net_open, 98 1.1.2.2 yamt net_close, 99 1.1.2.2 yamt noioctl, 100 1.1.2.2 yamt net_print 101 1.1.2.2 yamt }; 102 1.1.2.2 yamt 103 1.1.2.2 yamt int 104 1.1.2.2 yamt net_init(void) 105 1.1.2.2 yamt { 106 1.1.2.2 yamt return 0; 107 1.1.2.2 yamt } 108 1.1.2.2 yamt 109 1.1.2.2 yamt /* 110 1.1.2.2 yamt * Called by devopen after it sets f->f_dev to our devsw entry. 111 1.1.2.2 yamt * This opens the low-level device and sets f->f_devdata. 112 1.1.2.2 yamt * This is declared with variable arguments... 113 1.1.2.2 yamt */ 114 1.1.2.2 yamt int 115 1.1.2.2 yamt net_open(struct open_file *f, ...) 116 1.1.2.2 yamt { 117 1.1.2.2 yamt va_list args; 118 1.1.2.2 yamt char *devname; /* Device part of file name (or NULL). */ 119 1.1.2.2 yamt int error = 0; 120 1.1.2.2 yamt 121 1.1.2.2 yamt va_start(args, f); 122 1.1.2.2 yamt devname = va_arg(args, char*); 123 1.1.2.2 yamt va_end(args); 124 1.1.2.2 yamt 125 1.1.2.2 yamt /* On first open, do netif open, mount, etc. */ 126 1.1.2.2 yamt if (netdev_opens == 0) { 127 1.1.2.2 yamt /* Find network interface. */ 128 1.1.2.2 yamt if (netdev_sock < 0) { 129 1.1.2.2 yamt netdev_sock = netif_open(devname); 130 1.1.2.2 yamt if (netdev_sock < 0) { 131 1.1.2.2 yamt printf("net_open: netif_open() failed\n"); 132 1.1.2.2 yamt return (ENXIO); 133 1.1.2.2 yamt } 134 1.1.2.2 yamt if (debug) 135 1.1.2.2 yamt printf("net_open: netif_open() succeeded\n"); 136 1.1.2.2 yamt } 137 1.1.2.2 yamt if (rootip.s_addr == 0) { 138 1.1.2.2 yamt /* Get root IP address, and path, etc. */ 139 1.1.2.2 yamt error = net_getparams(netdev_sock); 140 1.1.2.2 yamt if (error) { 141 1.1.2.2 yamt /* getparams makes its own noise */ 142 1.1.2.2 yamt netif_close(netdev_sock); 143 1.1.2.2 yamt netdev_sock = -1; 144 1.1.2.2 yamt return (error); 145 1.1.2.2 yamt } 146 1.1.2.2 yamt } 147 1.1.2.2 yamt netdev_opens++; 148 1.1.2.2 yamt } 149 1.1.2.2 yamt netdev_opens++; 150 1.1.2.2 yamt f->f_devdata = &netdev_sock; 151 1.1.2.2 yamt return (error); 152 1.1.2.2 yamt } 153 1.1.2.2 yamt 154 1.1.2.2 yamt int 155 1.1.2.2 yamt net_close(f) 156 1.1.2.2 yamt struct open_file *f; 157 1.1.2.2 yamt { 158 1.1.2.2 yamt 159 1.1.2.2 yamt #ifdef NETIF_DEBUG 160 1.1.2.2 yamt if (debug) 161 1.1.2.2 yamt printf("net_close: opens=%d\n", netdev_opens); 162 1.1.2.2 yamt #endif 163 1.1.2.2 yamt 164 1.1.2.2 yamt /* On last close, do netif close, etc. */ 165 1.1.2.2 yamt f->f_devdata = NULL; 166 1.1.2.2 yamt /* Extra close call? */ 167 1.1.2.2 yamt if (netdev_opens <= 0) 168 1.1.2.2 yamt return (0); 169 1.1.2.2 yamt netdev_opens--; 170 1.1.2.2 yamt /* Not last close? */ 171 1.1.2.2 yamt if (netdev_opens > 0) 172 1.1.2.2 yamt return(0); 173 1.1.2.2 yamt rootip.s_addr = 0; 174 1.1.2.2 yamt if (netdev_sock >= 0) { 175 1.1.2.2 yamt if (debug) 176 1.1.2.2 yamt printf("net_close: calling netif_close()\n"); 177 1.1.2.2 yamt netif_close(netdev_sock); 178 1.1.2.2 yamt netdev_sock = -1; 179 1.1.2.2 yamt } 180 1.1.2.2 yamt return (0); 181 1.1.2.2 yamt } 182 1.1.2.2 yamt 183 1.1.2.2 yamt int 184 1.1.2.2 yamt net_strategy() 185 1.1.2.2 yamt { 186 1.1.2.2 yamt return EIO; 187 1.1.2.2 yamt } 188 1.1.2.2 yamt 189 1.1.2.2 yamt #define SUPPORT_BOOTP 190 1.1.2.2 yamt 191 1.1.2.2 yamt /* 192 1.1.2.2 yamt * Get info for NFS boot: our IP address, our hostname, 193 1.1.2.2 yamt * server IP address, and our root path on the server. 194 1.1.2.2 yamt * There are two ways to do this: The old, Sun way, 195 1.1.2.2 yamt * and the more modern, BOOTP way. (RFC951, RFC1048) 196 1.1.2.2 yamt * 197 1.1.2.2 yamt * The default is to use the Sun bootparams RPC 198 1.1.2.2 yamt * (because that is what the kernel will do). 199 1.1.2.2 yamt * MD code can make try_bootp initialied data, 200 1.1.2.2 yamt * which will override this common definition. 201 1.1.2.2 yamt */ 202 1.1.2.2 yamt #ifdef SUPPORT_BOOTP 203 1.1.2.2 yamt int try_bootp = 1; 204 1.1.2.2 yamt #endif 205 1.1.2.2 yamt 206 1.1.2.2 yamt extern n_long ip_convertaddr(char *p); 207 1.1.2.2 yamt 208 1.1.2.2 yamt static int 209 1.1.2.2 yamt net_getparams(sock) 210 1.1.2.2 yamt int sock; 211 1.1.2.2 yamt { 212 1.1.2.2 yamt char buf[MAXHOSTNAMELEN]; 213 1.1.2.2 yamt char temp[FNAME_SIZE]; 214 1.1.2.2 yamt struct iodesc *d; 215 1.1.2.2 yamt int i; 216 1.1.2.2 yamt n_long smask; 217 1.1.2.2 yamt 218 1.1.2.2 yamt #ifdef SUPPORT_BOOTP 219 1.1.2.2 yamt /* 220 1.1.2.2 yamt * Try to get boot info using BOOTP. If we succeed, then 221 1.1.2.2 yamt * the server IP address, gateway, and root path will all 222 1.1.2.2 yamt * be initialized. If any remain uninitialized, we will 223 1.1.2.2 yamt * use RARP and RPC/bootparam (the Sun way) to get them. 224 1.1.2.2 yamt */ 225 1.1.2.2 yamt if (try_bootp) 226 1.1.2.2 yamt bootp(sock, BOOTP_NONE); 227 1.1.2.2 yamt if (myip.s_addr != 0) 228 1.1.2.2 yamt goto exit; 229 1.1.2.2 yamt if (debug) 230 1.1.2.2 yamt printf("net_open: BOOTP failed, trying RARP/RPC...\n"); 231 1.1.2.2 yamt #endif 232 1.1.2.2 yamt 233 1.1.2.2 yamt /* 234 1.1.2.2 yamt * Use RARP to get our IP address. This also sets our 235 1.1.2.2 yamt * netmask to the "natural" default for our address. 236 1.1.2.2 yamt */ 237 1.1.2.2 yamt if (rarp_getipaddress(sock)) { 238 1.1.2.2 yamt printf("net_open: RARP failed\n"); 239 1.1.2.2 yamt return (EIO); 240 1.1.2.2 yamt } 241 1.1.2.2 yamt printf("net_open: client addr: %s\n", inet_ntoa(myip)); 242 1.1.2.2 yamt 243 1.1.2.2 yamt /* Get our hostname, server IP address, gateway. */ 244 1.1.2.2 yamt if (bp_whoami(sock)) { 245 1.1.2.2 yamt printf("net_open: bootparam/whoami RPC failed\n"); 246 1.1.2.2 yamt return (EIO); 247 1.1.2.2 yamt } 248 1.1.2.2 yamt printf("net_open: client name: %s\n", hostname); 249 1.1.2.2 yamt 250 1.1.2.2 yamt /* 251 1.1.2.2 yamt * Ignore the gateway from whoami (unreliable). 252 1.1.2.2 yamt * Use the "gateway" parameter instead. 253 1.1.2.2 yamt */ 254 1.1.2.2 yamt smask = 0; 255 1.1.2.2 yamt gateip.s_addr = 0; 256 1.1.2.2 yamt if (bp_getfile(sock, "gateway", &gateip, buf) == 0) { 257 1.1.2.2 yamt /* Got it! Parse the netmask. */ 258 1.1.2.2 yamt smask = ip_convertaddr(buf); 259 1.1.2.2 yamt } 260 1.1.2.2 yamt if (smask) { 261 1.1.2.2 yamt netmask = smask; 262 1.1.2.2 yamt printf("net_open: subnet mask: %s\n", intoa(netmask)); 263 1.1.2.2 yamt } 264 1.1.2.2 yamt if (gateip.s_addr) 265 1.1.2.2 yamt printf("net_open: net gateway: %s\n", inet_ntoa(gateip)); 266 1.1.2.2 yamt 267 1.1.2.2 yamt /* Get the root server and pathname. */ 268 1.1.2.2 yamt if (bp_getfile(sock, "root", &rootip, rootpath)) { 269 1.1.2.2 yamt printf("net_open: bootparam/getfile RPC failed\n"); 270 1.1.2.2 yamt return (EIO); 271 1.1.2.2 yamt } 272 1.1.2.2 yamt exit: 273 1.1.2.2 yamt /* 274 1.1.2.2 yamt * If present, strip the server's address off of the rootpath 275 1.1.2.2 yamt * before passing it along. This allows us to be compatible with 276 1.1.2.2 yamt * the kernel's diskless (BOOTP_NFSROOT) booting conventions 277 1.1.2.2 yamt */ 278 1.1.2.2 yamt for (i = 0; rootpath[i] != '\0' && i < FNAME_SIZE; i++) 279 1.1.2.2 yamt if (rootpath[i] == ':') 280 1.1.2.2 yamt break; 281 1.1.2.2 yamt if (i && i != FNAME_SIZE && rootpath[i] == ':') { 282 1.1.2.2 yamt rootpath[i++] = '\0'; 283 1.1.2.2 yamt if (inet_addr(&rootpath[0]) != INADDR_NONE) 284 1.1.2.2 yamt rootip.s_addr = inet_addr(&rootpath[0]); 285 1.1.2.2 yamt bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1); 286 1.1.2.2 yamt bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1); 287 1.1.2.2 yamt } 288 1.1.2.2 yamt printf("net_open: server addr: %s\n", inet_ntoa(rootip)); 289 1.1.2.2 yamt printf("net_open: server path: %s\n", rootpath); 290 1.1.2.2 yamt 291 1.1.2.2 yamt d = socktodesc(sock); 292 1.1.2.2 yamt sprintf(temp, "%6D", d->myea, ":"); 293 1.1.2.2 yamt setenv("boot.netif.ip", inet_ntoa(myip), 1); 294 1.1.2.2 yamt setenv("boot.netif.netmask", intoa(netmask), 1); 295 1.1.2.2 yamt setenv("boot.netif.gateway", inet_ntoa(gateip), 1); 296 1.1.2.2 yamt setenv("boot.netif.hwaddr", temp, 1); 297 1.1.2.2 yamt setenv("boot.nfsroot.server", inet_ntoa(rootip), 1); 298 1.1.2.2 yamt setenv("boot.nfsroot.path", rootpath, 1); 299 1.1.2.2 yamt 300 1.1.2.2 yamt return (0); 301 1.1.2.2 yamt } 302 1.1.2.2 yamt 303 1.1.2.2 yamt static void 304 1.1.2.2 yamt net_print(int verbose) 305 1.1.2.2 yamt { 306 1.1.2.2 yamt return; 307 1.1.2.2 yamt } 308
Indexes created Tue Sep 30 11:09:46 GMT 2025