1 /* $NetBSD: net.c,v 1.4 1999/05/07 16:19:28 drochner 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 char rootpath[FNAME_SIZE]; 67 68 static int netdev_sock = -1; 69 static int open_count; 70 71 /* 72 * Called by devopen after it sets f->f_dev to our devsw entry. 73 * This opens the low-level device and sets f->f_devdata. 74 */ 75 int 76 net_open(op) 77 struct of_dev *op; 78 { 79 int error = 0; 80 81 /* 82 * On first open, do netif open, mount, etc. 83 */ 84 if (open_count == 0) { 85 /* Find network interface. */ 86 if ((netdev_sock = netif_open(op)) < 0) { 87 error = errno; 88 goto bad; 89 } 90 if ((error = net_mountroot()) != 0) 91 goto bad; 92 } 93 open_count++; 94 bad: 95 if (netdev_sock >= 0 && open_count == 0) { 96 netif_close(netdev_sock); 97 netdev_sock = -1; 98 } 99 return error; 100 } 101 102 int 103 net_close(op) 104 struct of_dev *op; 105 { 106 /* 107 * On last close, do netif close, etc. 108 */ 109 if (open_count > 0) 110 if (--open_count == 0) { 111 netif_close(netdev_sock); 112 netdev_sock = -1; 113 } 114 } 115 116 int 117 net_mountroot() 118 { 119 120 #ifdef DEBUG 121 printf("net_mountroot\n"); 122 #endif 123 124 /* 125 * Get info for NFS boot: our IP address, out hostname, 126 * server IP address, and our root path on the server. 127 * We use BOOTP (RFC951, RFC1532) exclusively as mandated 128 * by PowerPC Reference Platform Specification I.4.2 129 */ 130 131 bootp(netdev_sock); 132 133 if (myip.s_addr == 0) 134 return ETIMEDOUT; 135 136 printf("Using IP address: %s\n", inet_ntoa(myip)); 137 138 #ifdef DEBUG 139 printf("myip: %s (%s)", hostname, inet_ntoa(myip)); 140 if (gateip.s_addr) 141 printf(", gateip: %s", inet_ntoa(gateip)); 142 if (netmask) 143 printf(", netmask: %s", intoa(netmask)); 144 printf("\n"); 145 #endif 146 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 147 148 /* 149 * Get the NFS file handle (mount). 150 */ 151 if (nfs_mount(netdev_sock, rootip, rootpath) < 0) 152 return errno; 153 return 0; 154 } 155