1 /* $NetBSD: net.c,v 1.5 2009/05/07 00:01:31 roy Exp $ */ 2 3 /* 4 * Copyright (C) 1995 Wolfgang Solfrank. 5 * Copyright (C) 1995 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * This module implements a "raw device" interface suitable for 36 * use by the stand-alone I/O library NFS code. This interface 37 * does not support any "block" access, and exists only for the 38 * purpose of initializing the network interface, getting boot 39 * parameters, and performing the NFS mount. 40 * 41 * At open time, this does: 42 * 43 * find interface - netif_open() 44 * BOOTP - bootp() 45 * RPC/mountd - nfs_mount() 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 * Note: this is based in part on sys/arch/sparc/stand/net.c 51 */ 52 53 #include <sys/param.h> 54 #include <sys/socket.h> 55 56 #include <net/if.h> 57 #include <netinet/in.h> 58 #include <netinet/in_systm.h> 59 60 #include <lib/libsa/stand.h> 61 #include <lib/libsa/net.h> 62 #include <lib/libsa/netif.h> 63 64 #include <lib/libkern/libkern.h> 65 66 #include "ofdev.h" 67 68 69 static int net_mountroot_bootparams(void); 70 static int net_mountroot_bootp(void); 71 72 char rootpath[FNAME_SIZE]; 73 74 static int netdev_sock = -1; 75 static int open_count; 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 */ 81 int 82 net_open(struct of_dev *op) 83 { 84 int error = 0; 85 86 /* 87 * On first open, do netif open, mount, etc. 88 */ 89 if (open_count == 0) { 90 /* Find network interface. */ 91 if ((netdev_sock = netif_open(op)) < 0) { 92 error = errno; 93 goto bad; 94 } 95 } 96 open_count++; 97 bad: 98 if (netdev_sock >= 0 && open_count == 0) { 99 netif_close(netdev_sock); 100 netdev_sock = -1; 101 } 102 return error; 103 } 104 105 int 106 net_close(struct of_dev *op) 107 { 108 109 /* 110 * On last close, do netif close, etc. 111 */ 112 if (open_count > 0) 113 if (--open_count == 0) { 114 netif_close(netdev_sock); 115 netdev_sock = -1; 116 } 117 } 118 119 static void 120 net_clear_params(void) 121 { 122 123 myip.s_addr = 0; 124 netmask = 0; 125 gateip.s_addr = 0; 126 *hostname = '\0'; 127 rootip.s_addr = 0; 128 *rootpath = '\0'; 129 } 130 131 int 132 net_mountroot_bootparams(void) 133 { 134 135 net_clear_params(); 136 137 /* Get our IP address. (rarp.c) */ 138 if (rarp_getipaddress(netdev_sock) == -1) 139 return (errno); 140 printf("Using BOOTPARAMS protocol:\n ip addr=%s\n", inet_ntoa(myip)); 141 if (bp_whoami(netdev_sock)) 142 return (errno); 143 printf(" hostname=%s\n", hostname); 144 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 145 return (errno); 146 147 return (0); 148 } 149 150 int 151 net_mountroot_bootp(void) 152 { 153 int attempts; 154 155 /* We need a few attempts here as some DHCP servers 156 * require >1 packet and my wireless bridge is always 157 * in learning mode until the 2nd attempt ... */ 158 for (attempts = 0; attempts < 3; attempts++) { 159 net_clear_params(); 160 bootp(netdev_sock); 161 if (myip.s_addr != 0) 162 break; 163 } 164 if (myip.s_addr == 0) 165 return(ENOENT); 166 167 printf("Using BOOTP protocol:\n ip addr=%s\n", inet_ntoa(myip)); 168 if (hostname[0]) 169 printf(" hostname=%s\n", hostname); 170 if (netmask) 171 printf(" netmask=%s\n", intoa(netmask)); 172 if (gateip.s_addr) 173 printf(" gateway=%s\n", inet_ntoa(gateip)); 174 175 return (0); 176 } 177 178 int 179 net_tftp_bootp(int **sock) 180 { 181 182 net_mountroot_bootp(); 183 if (myip.s_addr == 0) 184 return(ENOENT); 185 186 *sock = &netdev_sock; 187 return (0); 188 } 189 190 int 191 net_mountroot(void) 192 { 193 int error; 194 195 #ifdef DEBUG 196 printf("net_mountroot\n"); 197 #endif 198 199 /* 200 * Get info for NFS boot: our IP address, our hostname, 201 * server IP address, and our root path on the server. 202 * There are two ways to do this: The old, Sun way, 203 * and the more modern, BOOTP way. (RFC951, RFC1048) 204 */ 205 206 /* Try BOOTP first */ 207 error = net_mountroot_bootp(); 208 /* Historically, we've used BOOTPARAMS, so try that next */ 209 if (error != 0) 210 error = net_mountroot_bootparams(); 211 if (error != 0) 212 return (error); 213 214 printf(" root addr=%s\n path=%s\n", inet_ntoa(rootip), rootpath); 215 216 /* Get the NFS file handle (mount). */ 217 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 218 return (errno); 219 220 return (0); 221 } 222