1 /* $OpenBSD: net.c,v 1.7 2021/01/30 14:37:01 deraadt Exp $ */ 2 /* $NetBSD: net.c,v 1.1 1997/04/16 20:29:18 thorpej 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 #include <net/if.h> 57 #include <netinet/in.h> 58 #include <netinet/if_ether.h> 59 60 #include <lib/libsa/stand.h> 61 #include <lib/libsa/net.h> 62 #include <lib/libsa/netif.h> 63 #include <lib/libsa/bootp.h> 64 #include <lib/libsa/nfs.h> 65 66 #include "ofdev.h" 67 68 int net_mountroot(void); 69 70 extern char rootpath[FNAME_SIZE]; 71 72 static int netdev_sock = -1; 73 static int open_count; 74 75 /* 76 * Called by devopen after it sets f->f_dev to our devsw entry. 77 * This opens the low-level device and sets f->f_devdata. 78 */ 79 int 80 net_open(struct of_dev *op) 81 { 82 int error = 0; 83 84 /* 85 * On first open, do netif open, mount, etc. 86 */ 87 if (open_count == 0) { 88 /* Find network interface. */ 89 if ((netdev_sock = netif_open(op)) < 0) { 90 error = errno; 91 goto bad; 92 } 93 if ((error = net_mountroot()) != 0) 94 goto bad; 95 } 96 open_count++; 97 bad: 98 if (netdev_sock >= 0 && open_count == 0) { 99 netif_close(netdev_sock); 100 netdev_sock = -1; 101 } 102 return error; 103 } 104 105 void 106 net_close(struct of_dev *op) 107 { 108 /* 109 * On last close, do netif close, etc. 110 */ 111 if (open_count > 0) 112 if (--open_count == 0) { 113 netif_close(netdev_sock); 114 netdev_sock = -1; 115 } 116 } 117 118 int 119 net_mountroot() 120 { 121 122 #ifdef DEBUG 123 printf("net_mountroot\n"); 124 #endif 125 126 /* 127 * Get info for NFS boot: our IP address, out hostname, 128 * server IP address, and our root path on the server. 129 * We use BOOTP (RFC951, RFC1532) exclusively as mandated 130 * by PowerPC Reference Platform Specification I.4.2 131 */ 132 133 bootp(netdev_sock); 134 135 if (myip.s_addr == 0) 136 return ETIMEDOUT; 137 138 printf("Using IP address: %s\n", inet_ntoa(myip)); 139 140 #ifdef DEBUG 141 printf("myip: %s (%s)", hostname, inet_ntoa(myip)); 142 if (gateip.s_addr) 143 printf(", gateip: %s", inet_ntoa(gateip)); 144 if (netmask) 145 printf(", netmask: %s", intoa(netmask)); 146 printf("\n"); 147 #endif 148 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 149 150 /* 151 * Get the NFS file handle (mount). 152 */ 153 if (nfs_mount(netdev_sock, rootip, rootpath) < 0) 154 return errno; 155 return 0; 156 } 157