1 /* $OpenBSD: net.c,v 1.6 2014/08/21 14:24:08 mpi Exp $ */ 2 /* $NetBSD: net.c,v 1.1 2000/08/20 14:58:38 mrg Exp $ */ 3 4 /* 5 * Copyright (C) 1995 Wolfgang Solfrank. 6 * Copyright (C) 1995 TooLs GmbH. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by TooLs GmbH. 20 * 4. The name of TooLs GmbH may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* 36 * This module implements a "raw device" interface suitable for 37 * use by the stand-alone I/O library NFS code. This interface 38 * does not support any "block" access, and exists only for the 39 * purpose of initializing the network interface, getting boot 40 * parameters, and performing the NFS mount. 41 * 42 * At open time, this does: 43 * 44 * find interface - netif_open() 45 * BOOTP - bootp() 46 * RPC/mountd - nfs_mount() 47 * 48 * The root file handle from mountd is saved in a global 49 * for use by the NFS open code (NFS/lookup). 50 * 51 * Note: this is based in part on sys/arch/sparc/stand/net.c 52 */ 53 54 #include <sys/param.h> 55 #include <sys/socket.h> 56 57 #include <net/if.h> 58 #include <netinet/in.h> 59 60 #include <lib/libsa/stand.h> 61 #include <lib/libsa/net.h> 62 #include <lib/libsa/netif.h> 63 64 #include "ofdev.h" 65 66 static int net_mountroot_bootparams(void); 67 static int net_mountroot_bootp(void); 68 69 char rootpath[FNAME_SIZE]; 70 71 static int netdev_sock = -1; 72 static int open_count; 73 74 /* 75 * Called by devopen after it sets f->f_dev to our devsw entry. 76 * This opens the low-level device and sets f->f_devdata. 77 */ 78 int 79 net_open(struct of_dev *op) 80 { 81 int error = 0; 82 83 /* 84 * On first open, do netif open, mount, etc. 85 */ 86 if (open_count == 0) { 87 /* Find network interface. */ 88 if ((netdev_sock = netif_open(op)) < 0) { 89 error = errno; 90 goto bad; 91 } 92 if ((error = net_mountroot()) != 0) 93 goto bad; 94 } 95 open_count++; 96 bad: 97 if (netdev_sock >= 0 && open_count == 0) { 98 netif_close(netdev_sock); 99 netdev_sock = -1; 100 } 101 return error; 102 } 103 104 int 105 net_close(struct of_dev *op) 106 { 107 /* 108 * On last close, do netif close, etc. 109 */ 110 if (open_count > 0) 111 if (--open_count == 0) { 112 netif_close(netdev_sock); 113 netdev_sock = -1; 114 } 115 } 116 117 int 118 net_mountroot_bootparams(void) 119 { 120 /* Get our IP address. (rarp.c) */ 121 if (rarp_getipaddress(netdev_sock) == -1) 122 return (errno); 123 124 printf("Using BOOTPARAMS protocol: "); 125 printf("ip address: %s", inet_ntoa(myip)); 126 127 /* Get our hostname, server IP address. */ 128 if (bp_whoami(netdev_sock)) 129 return (errno); 130 131 printf(", hostname: %s\n", hostname); 132 133 /* Get the root pathname. */ 134 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 135 return (errno); 136 137 return (0); 138 } 139 140 int 141 net_mountroot_bootp(void) 142 { 143 bootp(netdev_sock); 144 145 if (myip.s_addr == 0) 146 return(ENOENT); 147 148 printf("Using BOOTP protocol: "); 149 printf("ip address: %s", inet_ntoa(myip)); 150 151 if (hostname[0]) 152 printf(", hostname: %s", hostname); 153 if (netmask) 154 printf(", netmask: %s", intoa(netmask)); 155 if (gateip.s_addr) 156 printf(", gateway: %s", inet_ntoa(gateip)); 157 printf("\n"); 158 159 return (0); 160 } 161 162 int 163 net_mountroot(void) 164 { 165 int error; 166 167 #ifdef DEBUG 168 printf("net_mountroot\n"); 169 #endif 170 171 /* 172 * Get info for NFS boot: our IP address, our hostname, 173 * server IP address, and our root path on the server. 174 * There are two ways to do this: The old, Sun way, 175 * and the more modern, BOOTP way. (RFC951, RFC1048) 176 */ 177 178 /* Historically, we've used BOOTPARAMS, so try that first */ 179 error = net_mountroot_bootparams(); 180 if (error != 0) 181 /* Next, try BOOTP */ 182 error = net_mountroot_bootp(); 183 if (error != 0) 184 return (error); 185 186 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 187 188 /* Get the NFS file handle (mount). */ 189 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 190 return (errno); 191 192 return (0); 193 } 194