1 /* $NetBSD: net.c,v 1.3 2006/07/13 20:03:34 uwe 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 if ((error = net_mountroot()) != 0) 96 goto bad; 97 } 98 open_count++; 99 bad: 100 if (netdev_sock >= 0 && open_count == 0) { 101 netif_close(netdev_sock); 102 netdev_sock = -1; 103 } 104 return error; 105 } 106 107 int 108 net_close(struct of_dev *op) 109 { 110 111 /* 112 * On last close, do netif close, etc. 113 */ 114 if (open_count > 0) 115 if (--open_count == 0) { 116 netif_close(netdev_sock); 117 netdev_sock = -1; 118 } 119 } 120 121 int 122 net_mountroot_bootparams(void) 123 { 124 125 /* Get our IP address. (rarp.c) */ 126 if (rarp_getipaddress(netdev_sock) == -1) 127 return (errno); 128 129 printf("Using BOOTPARAMS protocol: "); 130 printf("ip address: %s", inet_ntoa(myip)); 131 132 /* Get our hostname, server IP address. */ 133 if (bp_whoami(netdev_sock)) 134 return (errno); 135 136 printf(", hostname: %s\n", hostname); 137 138 /* Get the root pathname. */ 139 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 140 return (errno); 141 142 return (0); 143 } 144 145 int 146 net_mountroot_bootp(void) 147 { 148 149 bootp(netdev_sock); 150 151 if (myip.s_addr == 0) 152 return(ENOENT); 153 154 printf("Using BOOTP protocol: "); 155 printf("ip address: %s", inet_ntoa(myip)); 156 157 if (hostname[0]) 158 printf(", hostname: %s", hostname); 159 if (netmask) 160 printf(", netmask: %s", intoa(netmask)); 161 if (gateip.s_addr) 162 printf(", gateway: %s", inet_ntoa(gateip)); 163 printf("\n"); 164 165 return (0); 166 } 167 168 int 169 net_mountroot(void) 170 { 171 int error; 172 173 #ifdef DEBUG 174 printf("net_mountroot\n"); 175 #endif 176 177 /* 178 * Get info for NFS boot: our IP address, our hostname, 179 * server IP address, and our root path on the server. 180 * There are two ways to do this: The old, Sun way, 181 * and the more modern, BOOTP way. (RFC951, RFC1048) 182 */ 183 184 /* Try BOOTP first */ 185 error = net_mountroot_bootp(); 186 /* Historically, we've used BOOTPARAMS, so try that next */ 187 if (error != 0) 188 error = net_mountroot_bootparams(); 189 if (error != 0) 190 return (error); 191 192 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 193 194 /* Get the NFS file handle (mount). */ 195 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 196 return (errno); 197 198 return (0); 199 } 200