1 /* $NetBSD: dev_net.c,v 1.17 2021/04/12 03:55:40 mrg 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 <sys/param.h> 47 #include <sys/socket.h> 48 #include <net/if.h> 49 #include <netinet/in.h> 50 #include <netinet/in_systm.h> 51 52 #include <lib/libsa/stand.h> 53 #include <lib/libsa/net.h> 54 #include <lib/libsa/netif.h> 55 #include <lib/libsa/bootparam.h> 56 #include <lib/libsa/nfs.h> 57 58 #include <lib/libkern/libkern.h> 59 60 #include "dev_net.h" 61 62 #ifndef SUN_BOOTPARAMS 63 void bootp(int); 64 #endif 65 66 extern int debug; 67 extern int nfs_root_node[]; /* XXX - get from nfs_mount() */ 68 69 /* 70 * Local things... 71 */ 72 static int netdev_sock = -1; 73 static int netdev_opens; 74 75 int net_getparams(int); 76 77 /* 78 * Called by devopen after it sets f->f_dev to our devsw entry. 79 * This opens the low-level device and sets f->f_devdata. 80 * This is declared with variable arguments... 81 */ 82 int 83 net_open(struct open_file *f, ...) 84 { 85 va_list ap; 86 char *devname; /* Device part of file name (or NULL). */ 87 int error = 0; 88 89 va_start(ap, f); 90 devname = va_arg(ap, char*); 91 va_end(ap); 92 93 #ifdef NETIF_DEBUG 94 if (debug) 95 printf("net_open: %s\n", devname); 96 #endif 97 98 /* On first open, do netif open, mount, etc. */ 99 if (netdev_opens == 0) { 100 /* Find network interface. */ 101 if (netdev_sock < 0) { 102 netdev_sock = netif_open(devname); 103 if (netdev_sock < 0) { 104 printf("net_open: netif_open() failed\n"); 105 return (ENXIO); 106 } 107 if (debug) 108 printf("net_open: netif_open() succeeded\n"); 109 } 110 if (rootip.s_addr == 0) { 111 /* Get root IP address, and path, etc. */ 112 error = net_getparams(netdev_sock); 113 if (error) { 114 /* getparams makes its own noise */ 115 goto fail; 116 } 117 /* Get the NFS file handle (mountd). */ 118 error = nfs_mount(netdev_sock, rootip, rootpath); 119 if (error) { 120 error = errno; 121 printf("net_open: NFS mount error=%d\n", error); 122 rootip.s_addr = 0; 123 fail: 124 netif_close(netdev_sock); 125 netdev_sock = -1; 126 return (error); 127 } 128 if (debug) 129 printf("net_open: NFS mount succeeded\n"); 130 } 131 } 132 netdev_opens++; 133 f->f_devdata = nfs_root_node; 134 return (error); 135 } 136 137 int 138 net_close(struct open_file *f) 139 { 140 141 #ifdef NETIF_DEBUG 142 if (debug) 143 printf("net_close: opens=%d\n", netdev_opens); 144 #endif 145 146 /* On last close, do netif close, etc. */ 147 f->f_devdata = NULL; 148 /* Extra close call? */ 149 if (netdev_opens <= 0) 150 return (0); 151 netdev_opens--; 152 /* Not last close? */ 153 if (netdev_opens > 0) 154 return(0); 155 rootip.s_addr = 0; 156 if (netdev_sock >= 0) { 157 if (debug) 158 printf("net_close: calling netif_close()\n"); 159 netif_close(netdev_sock); 160 netdev_sock = -1; 161 } 162 return (0); 163 } 164 165 int 166 net_ioctl(struct open_file *f, u_long cmd, void *data) 167 { 168 return EIO; 169 } 170 171 int 172 net_strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf, size_t *rsize) 173 { 174 return EIO; 175 } 176 177 int 178 net_getparams(int sock) 179 { 180 /* 181 * Get info for NFS boot: our IP address, our hostname, 182 * server IP address, and our root path on the server. 183 * There are two ways to do this: The old, Sun way, 184 * and the more modern, BOOTP way. (RFC951, RFC1048) 185 */ 186 187 #ifdef SUN_BOOTPARAMS 188 /* Get our IP address. (rarp.c) */ 189 if (rarp_getipaddress(sock)) { 190 printf("net_open: RARP failed\n"); 191 return (EIO); 192 } 193 #else /* BOOTPARAMS */ 194 /* 195 * Get boot info using BOOTP. (RFC951, RFC1048) 196 * This also gets the server IP address, gateway, 197 * root path, etc. 198 */ 199 bootp(sock); 200 if (myip.s_addr == 0) { 201 printf("net_open: BOOTP failed\n"); 202 return (EIO); 203 } 204 #endif /* BOOTPARAMS */ 205 206 printf("boot: client addr: %s\n", inet_ntoa(myip)); 207 208 #ifdef SUN_BOOTPARAMS 209 /* Get our hostname, server IP address, gateway. */ 210 if (bp_whoami(sock)) { 211 printf("net_open: bootparam/whoami RPC failed\n"); 212 return (EIO); 213 } 214 #endif /* BOOTPARAMS */ 215 216 printf("boot: client name: %s\n", hostname); 217 if (gateip.s_addr) { 218 printf("boot: subnet mask: %s\n", intoa(netmask)); 219 printf("boot: net gateway: %s\n", inet_ntoa(gateip)); 220 } 221 222 #ifdef SUN_BOOTPARAMS 223 /* Get the root pathname. */ 224 if (bp_getfile(sock, "root", &rootip, rootpath)) { 225 printf("net_open: bootparam/getfile RPC failed\n"); 226 return (EIO); 227 } 228 #endif /* BOOTPARAMS */ 229 230 printf("boot: server addr: %s\n", inet_ntoa(rootip)); 231 printf("boot: server path: %s\n", rootpath); 232 233 return (0); 234 } 235
Indexes created Sat Sep 20 22:09:52 GMT 2025