1 /* $OpenBSD: net.c,v 1.9 2023/06/01 17:24:56 krw 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 #include <lib/libsa/bootparam.h> 64 #include <lib/libsa/bootp.h> 65 #include <lib/libsa/nfs.h> 66 67 #include "ofdev.h" 68 69 int net_mountroot_bootparams(void); 70 int net_mountroot_bootp(void); 71 int net_mountroot(void); 72 73 extern char rootpath[FNAME_SIZE]; 74 75 static int netdev_sock = -1; 76 static int open_count; 77 78 /* 79 * Called by devopen after it sets f->f_dev to our devsw entry. 80 * This opens the low-level device and sets f->f_devdata. 81 */ 82 int 83 net_open(struct of_dev *op) 84 { 85 int error = 0; 86 87 /* 88 * On first open, do netif open, mount, etc. 89 */ 90 if (open_count == 0) { 91 /* Find network interface. */ 92 if ((netdev_sock = netif_open(op)) < 0) { 93 error = errno; 94 goto bad; 95 } 96 if ((error = net_mountroot()) != 0) 97 goto bad; 98 } 99 open_count++; 100 bad: 101 if (netdev_sock >= 0 && open_count == 0) { 102 netif_close(netdev_sock); 103 netdev_sock = -1; 104 } 105 return error; 106 } 107 108 void 109 net_close(struct of_dev *op) 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 /* Get our IP address. (rarp.c) */ 125 if (rarp_getipaddress(netdev_sock) == -1) 126 return (errno); 127 128 printf("Using BOOTPARAMS protocol: "); 129 printf("ip address: %s", inet_ntoa(myip)); 130 131 /* Get our hostname, server IP address. */ 132 if (bp_whoami(netdev_sock)) 133 return (errno); 134 135 printf(", hostname: %s\n", hostname); 136 137 /* Get the root pathname. */ 138 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 139 return (errno); 140 141 return (0); 142 } 143 144 int 145 net_mountroot_bootp(void) 146 { 147 bootp(netdev_sock); 148 149 if (myip.s_addr == 0) 150 return(ENOENT); 151 152 printf("Using BOOTP protocol: "); 153 printf("ip address: %s", inet_ntoa(myip)); 154 155 if (hostname[0]) 156 printf(", hostname: %s", hostname); 157 if (netmask) 158 printf(", netmask: %s", intoa(netmask)); 159 if (gateip.s_addr) 160 printf(", gateway: %s", inet_ntoa(gateip)); 161 printf("\n"); 162 163 return (0); 164 } 165 166 int 167 net_mountroot(void) 168 { 169 int error; 170 171 #ifdef DEBUG 172 printf("net_mountroot\n"); 173 #endif 174 175 /* 176 * Get info for NFS boot: our IP address, our hostname, 177 * server IP address, and our root path on the server. 178 * There are two ways to do this: The old, Sun way, 179 * and the more modern, BOOTP way. (RFC951, RFC1048) 180 */ 181 182 /* Historically, we've used BOOTPARAMS, so try that first */ 183 error = net_mountroot_bootparams(); 184 if (error != 0) 185 /* Next, try BOOTP */ 186 error = net_mountroot_bootp(); 187 if (error != 0) 188 return (error); 189 190 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 191 192 /* Get the NFS file handle (mount). */ 193 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 194 return (errno); 195 196 return (0); 197 } 198