Annotation of sys/arch/alpha/stand/netboot/dev_net.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: dev_net.c,v 1.3 2002/03/14 03:15:51 millert Exp $ */
! 2: /* $NetBSD: dev_net.c,v 1.4 1997/04/06 08:41:24 cgd Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995 Gordon W. Ross
! 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. The name of the author may not be used to endorse or promote products
! 17: * derived from this software without specific prior written permission.
! 18: * 4. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed by Gordon W. Ross
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 31: * THIS SOFTWARE, EVEN IF 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: * RARP for IP address - rarp_getipaddress()
! 45: * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
! 46: * RPC/mountd - nfs_mount(sock, ip, path)
! 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:
! 52: #include <stdarg.h>
! 53: #include <sys/param.h>
! 54: #include <sys/socket.h>
! 55: #include <net/if.h>
! 56: #include <netinet/in.h>
! 57: #include <netinet/if_ether.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: #include <lib/libsa/bootparam.h>
! 64: #include "dev_net.h"
! 65:
! 66: extern int debug;
! 67: extern int nfs_root_node[]; /* XXX - get from nfs_mount() */
! 68:
! 69: /*
! 70: * Various globals needed by the network code:
! 71: */
! 72:
! 73: #if 0
! 74: /* for arp.c, rarp.c */
! 75: u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
! 76: #endif
! 77:
! 78: struct in_addr myip; /* my ip address */
! 79: struct in_addr rootip; /* root ip address */
! 80: struct in_addr gateip; /* swap ip address */
! 81: n_long netmask; /* subnet or net mask */
! 82:
! 83: char rootpath[FNAME_SIZE];
! 84:
! 85: int hostnamelen;
! 86: char hostname[FNAME_SIZE];
! 87:
! 88: int domainnamelen;
! 89: char domainname[FNAME_SIZE];
! 90:
! 91: /*
! 92: * Local things...
! 93: */
! 94: static int netdev_sock = -1;
! 95: static int netdev_opens;
! 96:
! 97: /*
! 98: * Called by devopen after it sets f->f_dev to our devsw entry.
! 99: * This opens the low-level device and sets f->f_devdata.
! 100: * This is declared with variable arguments...
! 101: */
! 102: int
! 103: net_open(struct open_file *f, ...)
! 104: {
! 105: va_list ap;
! 106: char *devname; /* Device part of file name (or NULL). */
! 107: int error = 0;
! 108:
! 109: va_start(ap, f);
! 110: devname = va_arg(ap, char *);
! 111: va_end(ap);
! 112:
! 113: #ifdef NETIF_DEBUG
! 114: if (debug)
! 115: printf("net_open: %s\n", devname);
! 116: #endif
! 117:
! 118: /* On first open, do netif open, mount, etc. */
! 119: if (netdev_opens == 0) {
! 120: /* Find network interface. */
! 121: if (netdev_sock < 0) {
! 122: netdev_sock = netif_open(devname);
! 123: if (netdev_sock < 0) {
! 124: printf("net_open: netif_open() failed\n");
! 125: return (ENXIO);
! 126: }
! 127: if (debug)
! 128: printf("net_open: netif_open() succeeded\n");
! 129: }
! 130: if (rootip.s_addr == 0) {
! 131: /* Get root IP address, and path, etc. */
! 132: error = net_getparams(netdev_sock);
! 133: if (error) {
! 134: /* getparams makes its own noise */
! 135: goto fail;
! 136: }
! 137: /* Get the NFS file handle (mountd). */
! 138: error = nfs_mount(netdev_sock, rootip, rootpath);
! 139: if (error) {
! 140: printf("net_open: NFS mount error=%d\n", error);
! 141: rootip.s_addr = 0;
! 142: fail:
! 143: netif_close(netdev_sock);
! 144: netdev_sock = -1;
! 145: return (error);
! 146: }
! 147: if (debug)
! 148: printf("net_open: NFS mount succeeded\n");
! 149: }
! 150: }
! 151: netdev_opens++;
! 152: f->f_devdata = nfs_root_node;
! 153: return (error);
! 154: }
! 155:
! 156: int
! 157: net_close(f)
! 158: struct open_file *f;
! 159: {
! 160:
! 161: #ifdef NETIF_DEBUG
! 162: if (debug)
! 163: printf("net_close: opens=%d\n", netdev_opens);
! 164: #endif
! 165:
! 166: /* On last close, do netif close, etc. */
! 167: f->f_devdata = NULL;
! 168: /* Extra close call? */
! 169: if (netdev_opens <= 0)
! 170: return (0);
! 171: netdev_opens--;
! 172: /* Not last close? */
! 173: if (netdev_opens > 0)
! 174: return(0);
! 175: rootip.s_addr = 0;
! 176: if (netdev_sock >= 0) {
! 177: if (debug)
! 178: printf("net_close: calling netif_close()\n");
! 179: netif_close(netdev_sock);
! 180: netdev_sock = -1;
! 181: }
! 182: return (0);
! 183: }
! 184:
! 185: int
! 186: net_ioctl()
! 187: {
! 188: return EIO;
! 189: }
! 190:
! 191: int
! 192: net_strategy()
! 193: {
! 194: return EIO;
! 195: }
! 196:
! 197: int
! 198: net_getparams(sock)
! 199: int sock;
! 200: {
! 201: /*
! 202: * Get info for NFS boot: our IP address, our hostname,
! 203: * server IP address, and our root path on the server.
! 204: * There are two ways to do this: The old, Sun way,
! 205: * and the more modern, BOOTP way. (RFC951, RFC1048)
! 206: */
! 207:
! 208: #ifdef SUN_BOOTPARAMS
! 209: /* Get our IP address. (rarp.c) */
! 210: if (rarp_getipaddress(sock)) {
! 211: printf("net_open: RARP failed\n");
! 212: return (EIO);
! 213: }
! 214: #else /* BOOTPARAMS */
! 215: /*
! 216: * Get boot info using BOOTP. (RFC951, RFC1048)
! 217: * This also gets the server IP address, gateway,
! 218: * root path, etc.
! 219: */
! 220: bootp(sock);
! 221: if (myip.s_addr == 0) {
! 222: printf("net_open: BOOTP failed\n");
! 223: return (EIO);
! 224: }
! 225: #endif /* BOOTPARAMS */
! 226:
! 227: printf("boot: client addr: %s\n", inet_ntoa(myip));
! 228:
! 229: #ifdef SUN_BOOTPARAMS
! 230: /* Get our hostname, server IP address, gateway. */
! 231: if (bp_whoami(sock)) {
! 232: printf("net_open: bootparam/whoami RPC failed\n");
! 233: return (EIO);
! 234: }
! 235: #endif /* BOOTPARAMS */
! 236:
! 237: printf("boot: client name: %s\n", hostname);
! 238: if (gateip.s_addr) {
! 239: printf("boot: subnet mask: %s\n", intoa(netmask));
! 240: printf("boot: net gateway: %s\n", inet_ntoa(gateip));
! 241: }
! 242:
! 243: #ifdef SUN_BOOTPARAMS
! 244: /* Get the root pathname. */
! 245: if (bp_getfile(sock, "root", &rootip, rootpath)) {
! 246: printf("net_open: bootparam/getfile RPC failed\n");
! 247: return (EIO);
! 248: }
! 249: #endif /* BOOTPARAMS */
! 250:
! 251: printf("boot: server addr: %s\n", inet_ntoa(rootip));
! 252: printf("boot: server path: %s\n", rootpath);
! 253:
! 254: return (0);
! 255: }
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