1 /* $OpenBSD: net.c,v 1.5 2014/08/21 14:24:08 mpi 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 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(struct of_dev *op) 75 { 76 int error = 0; 77 78 /* 79 * On first open, do netif open, mount, etc. 80 */ 81 if (open_count == 0) { 82 /* Find network interface. */ 83 if ((netdev_sock = netif_open(op)) < 0) { 84 error = errno; 85 goto bad; 86 } 87 if ((error = net_mountroot()) != 0) 88 goto bad; 89 } 90 open_count++; 91 bad: 92 if (netdev_sock >= 0 && open_count == 0) { 93 netif_close(netdev_sock); 94 netdev_sock = -1; 95 } 96 return error; 97 } 98 99 int 100 net_close(struct of_dev *op) 101 { 102 /* 103 * On last close, do netif close, etc. 104 */ 105 if (open_count > 0) 106 if (--open_count == 0) { 107 netif_close(netdev_sock); 108 netdev_sock = -1; 109 } 110 } 111 112 int 113 net_mountroot() 114 { 115 116 #ifdef DEBUG 117 printf("net_mountroot\n"); 118 #endif 119 120 /* 121 * Get info for NFS boot: our IP address, out hostname, 122 * server IP address, and our root path on the server. 123 * We use BOOTP (RFC951, RFC1532) exclusively as mandated 124 * by PowerPC Reference Platform Specification I.4.2 125 */ 126 127 bootp(netdev_sock); 128 129 if (myip.s_addr == 0) 130 return ETIMEDOUT; 131 132 printf("Using IP address: %s\n", inet_ntoa(myip)); 133 134 #ifdef DEBUG 135 printf("myip: %s (%s)", hostname, inet_ntoa(myip)); 136 if (gateip.s_addr) 137 printf(", gateip: %s", inet_ntoa(gateip)); 138 if (netmask) 139 printf(", netmask: %s", intoa(netmask)); 140 printf("\n"); 141 #endif 142 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 143 144 /* 145 * Get the NFS file handle (mount). 146 */ 147 if (nfs_mount(netdev_sock, rootip, rootpath) < 0) 148 return errno; 149 return 0; 150 } 151