1 /* $NetBSD: net.c,v 1.5 2009/10/21 23:12:09 snj Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Gordon W. Ross 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * This module implements a "raw device" interface suitable for 30 * use by the stand-alone I/O library NFS code. This interface 31 * does not support any "block" access, and exists only for the 32 * purpose of initializing the network interface, getting boot 33 * parameters, and performing the NFS mount. 34 * 35 * At open time, this does: 36 * 37 * find interface - netif_open() 38 * RARP for IP address - rarp_getipaddress() 39 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...) 40 * RPC/mountd - nfs_mount(sock, ip, path) 41 * 42 * the root file handle from mountd is saved in a global 43 * for use by the NFS open code (NFS/lookup). 44 */ 45 46 #include <sys/param.h> 47 #include <sys/socket.h> 48 #include <net/if.h> 49 #include <netinet/in.h> 50 #include <netinet/in_systm.h> 51 52 #include <lib/libsa/stand.h> 53 #include <lib/libsa/net.h> 54 #include <lib/libsa/bootparam.h> 55 #include <lib/libsa/nfs.h> 56 57 #include <lib/libkern/libkern.h> 58 59 #include <promdev.h> 60 61 #include "netif_news.h" 62 63 char rootpath[FNAME_SIZE]; 64 65 int netdev_sock = -1; 66 static int open_count; 67 68 /* 69 * Called by devopen after it sets f->f_dev to our devsw entry. 70 * This opens the low-level device and sets f->f_devdata. 71 */ 72 int 73 net_open(struct romdev *pd) 74 { 75 int error = 0; 76 77 /* On first open, do netif open, mount, etc. */ 78 if (open_count == 0) { 79 /* Find network interface. */ 80 if ((netdev_sock = netif_news_open(pd)) < 0) { 81 error = errno; 82 goto bad; 83 } 84 if ((error = net_mountroot()) != 0) 85 goto bad; 86 } 87 open_count++; 88 bad: 89 return error; 90 } 91 92 int 93 net_close(struct romdev *pd) 94 { 95 /* On last close, do netif close, etc. */ 96 if (open_count <= 0) 97 return 0; 98 99 if (--open_count == 0) 100 netif_news_close(netdev_sock); 101 102 return 0; 103 } 104 105 int 106 net_mountroot(void) 107 { 108 109 #ifdef DEBUG 110 printf("net_mountroot\n"); 111 #endif 112 113 /* 114 * Get info for NFS boot: our IP address, our hostname, 115 * server IP address, and our root path on the server. 116 * There are two ways to do this: The old, Sun way, 117 * and the more modern, BOOTP way. (RFC951, RFC1048) 118 */ 119 120 #ifdef SUN_BOOTPARAMS 121 /* Get boot info using RARP and Sun bootparams. */ 122 123 /* Get our IP address. (rarp.c) */ 124 if (rarp_getipaddress(netdev_sock) == -1) 125 return (errno); 126 127 printf("boot: client IP address: %s\n", inet_ntoa(myip)); 128 129 /* Get our hostname, server IP address. */ 130 if (bp_whoami(netdev_sock)) 131 return (errno); 132 133 printf("boot: client name: %s\n", hostname); 134 135 /* Get the root pathname. */ 136 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 137 return (errno); 138 139 #else 140 141 /* Get boot info using BOOTP way. (RFC951, RFC1048) */ 142 bootp(netdev_sock); 143 144 printf("Using IP address: %s\n", inet_ntoa(myip)); 145 146 printf("myip: %s (%s)", hostname, inet_ntoa(myip)); 147 if (gateip) 148 printf(", gateip: %s", inet_ntoa(gateip)); 149 if (netmask) 150 printf(", netmask: %s", intoa(netmask)); 151 printf("\n"); 152 153 #endif 154 155 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 156 157 /* Get the NFS file handle (mount). */ 158 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 159 return (errno); 160 161 return 0; 162 } 163