1 /* $NetBSD: net.c,v 1.11 2021/04/12 03:55:40 mrg 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/netif.h> 55 #include <lib/libsa/bootparam.h> 56 #include <lib/libsa/bootp.h> 57 #include <lib/libsa/nfs.h> 58 59 #include <lib/libkern/libkern.h> 60 61 #include <sparc/stand/common/promdev.h> 62 63 int netdev_sock = -1; 64 static int open_count; 65 66 static int net_mountroot_bootparams(void); 67 static int net_mountroot_bootp(void); 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 promdata *pd) 75 { 76 int error = 0; 77 78 /* On first open, do netif open, mount, etc. */ 79 if (open_count == 0) { 80 /* Find network interface. */ 81 if ((netdev_sock = netif_open(pd)) < 0) { 82 error = errno; 83 goto bad; 84 } 85 if ((error = net_mountroot()) != 0) 86 goto bad; 87 } 88 open_count++; 89 bad: 90 return (error); 91 } 92 93 int 94 net_close(struct promdata *pd) 95 { 96 /* On last close, do netif close, etc. */ 97 if (open_count <= 0) 98 return (0); 99 100 if (--open_count == 0) 101 return (netif_close(netdev_sock)); 102 103 return (0); 104 } 105 106 int 107 net_mountroot_bootparams(void) 108 { 109 printf("Trying BOOTPARAMS protocol... "); 110 111 /* Get our IP address. (rarp.c) */ 112 if (rarp_getipaddress(netdev_sock) == -1) 113 return (errno); 114 115 printf("ip address: %s", inet_ntoa(myip)); 116 117 /* Get our hostname, server IP address. */ 118 if (bp_whoami(netdev_sock)) 119 return (errno); 120 121 printf(", hostname: %s\n", hostname); 122 123 /* Get the root pathname. */ 124 if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) 125 return (errno); 126 127 return (0); 128 } 129 130 int 131 net_mountroot_bootp(void) 132 { 133 printf("Trying BOOTP protocol... "); 134 135 bootp(netdev_sock); 136 137 if (myip.s_addr == 0) 138 return(ENOENT); 139 140 printf("ip address: %s", inet_ntoa(myip)); 141 142 if (hostname[0]) 143 printf(", hostname: %s", hostname); 144 if (netmask) 145 printf(", netmask: %s", intoa(netmask)); 146 if (gateip.s_addr) 147 printf(", gateway: %s", inet_ntoa(gateip)); 148 printf("\n"); 149 150 return (0); 151 } 152 153 int 154 net_mountroot(void) 155 { 156 int error; 157 158 #ifdef DEBUG 159 printf("net_mountroot\n"); 160 #endif 161 162 /* 163 * Get info for NFS boot: our IP address, our hostname, 164 * server IP address, and our root path on the server. 165 * There are two ways to do this: The old, Sun way, 166 * and the more modern, BOOTP way. (RFC951, RFC1048) 167 */ 168 169 /* Try BOOTP first */ 170 error = net_mountroot_bootp(); 171 /* Historically, we've used BOOTPARAMS, so try that next */ 172 if (error != 0) 173 error = net_mountroot_bootparams(); 174 if (error != 0) 175 return (error); 176 177 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 178 179 /* Get the NFS file handle (mount). */ 180 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) 181 return (errno); 182 183 return (0); 184 } 185