1 /* $NetBSD: net.c,v 1.1 1998/05/15 10:15:59 tsubai 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 char rootpath[FNAME_SIZE]; 65 66 static int netdev_sock = -1; 67 static int open_count; 68 69 /* 70 * Called by devopen after it sets f->f_dev to our devsw entry. 71 * This opens the low-level device and sets f->f_devdata. 72 */ 73 int 74 net_open(op) 75 struct of_dev *op; 76 { 77 int error = 0; 78 79 /* 80 * On first open, do netif open, mount, etc. 81 */ 82 if (open_count == 0) { 83 /* Find network interface. */ 84 if ((netdev_sock = netif_open(op)) < 0) { 85 error = errno; 86 goto bad; 87 } 88 if ((error = net_mountroot()) != 0) 89 goto bad; 90 } 91 open_count++; 92 bad: 93 if (netdev_sock >= 0 && open_count == 0) { 94 netif_close(netdev_sock); 95 netdev_sock = -1; 96 } 97 return error; 98 } 99 100 int 101 net_close(op) 102 struct of_dev *op; 103 { 104 /* 105 * On last close, do netif close, etc. 106 */ 107 if (open_count > 0) 108 if (--open_count == 0) { 109 netif_close(netdev_sock); 110 netdev_sock = -1; 111 } 112 } 113 114 int 115 net_mountroot() 116 { 117 118 #ifdef DEBUG 119 printf("net_mountroot\n"); 120 #endif 121 122 /* 123 * Get info for NFS boot: our IP address, out hostname, 124 * server IP address, and our root path on the server. 125 * We use BOOTP (RFC951, RFC1532) exclusively as mandated 126 * by PowerPC Reference Platform Specification I.4.2 127 */ 128 129 bootp(netdev_sock); 130 131 if (myip.s_addr == 0) 132 return ETIMEDOUT; 133 134 printf("Using IP address: %s\n", inet_ntoa(myip)); 135 136 #ifdef DEBUG 137 printf("myip: %s (%s)", hostname, inet_ntoa(myip)); 138 if (gateip.s_addr) 139 printf(", gateip: %s", inet_ntoa(gateip)); 140 if (netmask) 141 printf(", netmask: %s", intoa(netmask)); 142 printf("\n"); 143 #endif 144 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 145 146 /* 147 * Get the NFS file handle (mount). 148 */ 149 if (nfs_mount(netdev_sock, rootip, rootpath) < 0) 150 return errno; 151 return 0; 152 } 153