1 /* $NetBSD: dev_net.c,v 1.5 2009/10/21 23:12:09 snj 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * This module implements a "raw device" interface suitable for 30 * use by the stand-alone I/O library NFS code. This interface 31 * does not support any "block" access, and exists only for the 32 * purpose of initializing the network interface, getting boot 33 * parameters, and performing the NFS mount. 34 * 35 * At open time, this does: 36 * 37 * find interface - netif_open() 38 * RARP for IP address - rarp_getipaddress() 39 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...) 40 * RPC/mountd - nfs_mount(sock, ip, path) 41 * 42 * the root file handle from mountd is saved in a global 43 * for use by the NFS open code (NFS/lookup). 44 */ 45 46 #include <machine/stdarg.h> 47 #include <sys/param.h> 48 #include <sys/socket.h> 49 #include <net/if.h> 50 #include <netinet/in.h> 51 #include <netinet/in_systm.h> 52 53 #include <lib/libsa/stand.h> 54 #include <lib/libsa/net.h> 55 #include <lib/libsa/netif.h> 56 #include <lib/libsa/bootparam.h> 57 #include <lib/libsa/nfs.h> 58 59 #include <lib/libkern/libkern.h> 60 61 #include <lib/libsa/dev_net.h> 62 63 #ifndef SUN_BOOTPARAMS 64 void bootp(int); 65 #endif 66 67 extern int debug; 68 extern int nfs_root_node[]; /* XXX - get from nfs_mount() */ 69 70 /* 71 * Various globals needed by the network code: 72 */ 73 74 #if 0 75 /* for arp.c, rarp.c */ 76 u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 77 #endif 78 79 struct in_addr myip; /* my ip address */ 80 struct in_addr rootip; /* root ip address */ 81 struct in_addr gateip; /* swap ip address */ 82 n_long netmask; /* subnet or net mask */ 83 84 char rootpath[FNAME_SIZE]; 85 char hostname[FNAME_SIZE]; 86 87 /* 88 * Local things... 89 */ 90 static int netdev_sock = -1; 91 static int netdev_opens; 92 93 int net_getparams(int); 94 95 /* 96 * Called by devopen after it sets f->f_dev to our devsw entry. 97 * This opens the low-level device and sets f->f_devdata. 98 * This is declared with variable arguments... 99 */ 100 int 101 net_open(struct open_file *f, ...) 102 { 103 va_list ap; 104 char *devname; /* Device part of file name (or NULL). */ 105 int error = 0; 106 107 va_start(ap, f); 108 devname = va_arg(ap, char*); 109 va_end(ap); 110 111 #ifdef NETIF_DEBUG 112 if (debug) 113 printf("net_open: %s\n", devname); 114 #endif 115 116 /* On first open, do netif open, mount, etc. */ 117 if (netdev_opens == 0) { 118 /* Find network interface. */ 119 if (netdev_sock < 0) { 120 netdev_sock = netif_open(devname); 121 if (netdev_sock < 0) { 122 printf("net_open: netif_open() failed\n"); 123 return (ENXIO); 124 } 125 if (debug) 126 printf("net_open: netif_open() succeeded\n"); 127 } 128 if (rootip.s_addr == 0) { 129 /* Get root IP address, and path, etc. */ 130 error = net_getparams(netdev_sock); 131 if (error) { 132 /* getparams makes its own noise */ 133 goto fail; 134 } 135 /* Get the NFS file handle (mountd). */ 136 error = nfs_mount(netdev_sock, rootip, rootpath); 137 if (error) { 138 error = errno; 139 printf("net_open: NFS mount error=%d\n", error); 140 rootip.s_addr = 0; 141 fail: 142 netif_close(netdev_sock); 143 netdev_sock = -1; 144 return (error); 145 } 146 if (debug) 147 printf("net_open: NFS mount succeeded\n"); 148 } 149 } 150 netdev_opens++; 151 f->f_devdata = nfs_root_node; 152 return (error); 153 } 154 155 int 156 net_close(struct open_file *f) 157 { 158 159 #ifdef NETIF_DEBUG 160 if (debug) 161 printf("net_close: opens=%d\n", netdev_opens); 162 #endif 163 164 /* On last close, do netif close, etc. */ 165 f->f_devdata = NULL; 166 /* Extra close call? */ 167 if (netdev_opens <= 0) 168 return (0); 169 netdev_opens--; 170 /* Not last close? */ 171 if (netdev_opens > 0) 172 return(0); 173 rootip.s_addr = 0; 174 if (netdev_sock >= 0) { 175 if (debug) 176 printf("net_close: calling netif_close()\n"); 177 netif_close(netdev_sock); 178 netdev_sock = -1; 179 } 180 return (0); 181 } 182 183 int 184 net_ioctl(struct open_file *a, u_long b, void *c) 185 { 186 return EIO; 187 } 188 189 int 190 net_strategy(void *a, int b, daddr_t c, size_t d, void *e, size_t *f) 191 { 192 return EIO; 193 } 194 195 int 196 net_getparams(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