sys/arch/ia64/stand/common/dev_net.c

   1 /*
   2  * $NetBSD: dev_net.c,v 1.6 2009/03/18 17:06:45 cegger Exp $
   3  */
   4
   5 /*-
   6  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   7  * All rights reserved.
   8  *
   9  * This code is derived from software contributed to The NetBSD Foundation
  10  * by Gordon W. Ross.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 /* __FBSDID("$FreeBSD: src/sys/boot/common/dev_net.c,v 1.15 2004/07/08 22:35:33 brian Exp $"); */
  36
  37 /*-
  38  * This module implements a "raw device" interface suitable for
  39  * use by the stand-alone I/O library NFS code.  This interface
  40  * does not support any "block" access, and exists only for the
  41  * purpose of initializing the network interface, getting boot
  42  * parameters, and performing the NFS mount.
  43  *
  44  * At open time, this does:
  45  *
  46  * find interface      - netif_open()
  47  * RARP for IP address - rarp_getipaddress()
  48  * RPC/bootparams      - callrpc(d, RPC_BOOTPARAMS, ...)
  49  * RPC/mountd          - nfs_mount(sock, ip, path)
  50  *
  51  * the root file handle from mountd is saved in a global
  52  * for use by the NFS open code (NFS/lookup).
  53  */
  54
  55 #include <machine/stdarg.h>
  56 #include <sys/param.h>
  57 #include <sys/socket.h>
  58 #include <net/if.h>
  59 #include <netinet/in.h>
  60 #include <netinet/in_systm.h>
  61
  62 #include <stand.h>
  63 #include <string.h>
  64 #include <net.h>
  65 #include <netif.h>
  66 #include <bootp.h>
  67 #include <bootparam.h>
  68
  69 #include "dev_net.h"
  70 #include "bootstrap.h"
  71
  72 int debug = 0;
  73
  74 static int netdev_sock = -1;
  75 static int netdev_opens;
  76
  77 static int      net_init(void);
  78 static int      net_open(struct open_file *, ...);
  79 static int      net_close(struct open_file *);
  80 static int      net_strategy();
  81 static void     net_print(int);
  82
  83 static int net_getparams(int sock);
  84
  85 struct devsw netdev = {
  86     "net",
  87     DEVT_NET,
  88     net_init,
  89     net_strategy,
  90     net_open,
  91     net_close,
  92     noioctl,
  93     net_print
  94 };
  95
  96 int
  97 net_init(void)
  98 {
  99     return 0;
 100 }
 101
 102 /*
 103  * Called by devopen after it sets f->f_dev to our devsw entry.
 104  * This opens the low-level device and sets f->f_devdata.
 105  * This is declared with variable arguments...
 106  */
 107 int
 108 net_open(struct open_file *f, ...)
 109 {
 110     va_list args;
 111     char *devname;              /* Device part of file name (or NULL). */
 112     int error = 0;
 113
 114     va_start(args, f);
 115     devname = va_arg(args, char*);
 116     va_end(args);
 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                 netif_close(netdev_sock);
 136                 netdev_sock = -1;
 137                 return (error);
 138             }
 139         }
 140         netdev_opens++;
 141     }
 142     netdev_opens++;
 143     f->f_devdata = &netdev_sock;
 144     return (error);
 145 }
 146
 147 int
 148 net_close(struct open_file *f)
 149 {
 150
 151 #ifdef  NETIF_DEBUG
 152     if (debug)
 153         printf("net_close: opens=%d\n", netdev_opens);
 154 #endif
 155
 156     /* On last close, do netif close, etc. */
 157     f->f_devdata = NULL;
 158     /* Extra close call? */
 159     if (netdev_opens <= 0)
 160         return (0);
 161     netdev_opens--;
 162     /* Not last close? */
 163     if (netdev_opens > 0)
 164         return(0);
 165     rootip.s_addr = 0;
 166     if (netdev_sock >= 0) {
 167         if (debug)
 168             printf("net_close: calling netif_close()\n");
 169         netif_close(netdev_sock);
 170         netdev_sock = -1;
 171     }
 172     return (0);
 173 }
 174
 175 int
 176 net_strategy(void)
 177 {
 178     return EIO;
 179 }
 180
 181 #define SUPPORT_BOOTP
 182
 183 /*
 184  * Get info for NFS boot: our IP address, our hostname,
 185  * server IP address, and our root path on the server.
 186  * There are two ways to do this:  The old, Sun way,
 187  * and the more modern, BOOTP way. (RFC951, RFC1048)
 188  *
 189  * The default is to use the Sun bootparams RPC
 190  * (because that is what the kernel will do).
 191  * MD code can make try_bootp initialied data,
 192  * which will override this common definition.
 193  */
 194 #ifdef  SUPPORT_BOOTP
 195 int try_bootp = 1;
 196 #endif
 197
 198 extern n_long ip_convertaddr(char *p);
 199
 200 static int
 201 net_getparams(int sock)
 202 {
 203     char buf[MAXHOSTNAMELEN];
 204     char temp[FNAME_SIZE];
 205     struct iodesc *d;
 206     int i;
 207     n_long smask;
 208
 209 #ifdef  SUPPORT_BOOTP
 210     /*
 211      * Try to get boot info using BOOTP.  If we succeed, then
 212      * the server IP address, gateway, and root path will all
 213      * be initialized.  If any remain uninitialized, we will
 214      * use RARP and RPC/bootparam (the Sun way) to get them.
 215      */
 216     if (try_bootp)
 217         bootp(sock, BOOTP_NONE);
 218     if (myip.s_addr != 0)
 219         goto exit;
 220     if (debug)
 221         printf("net_open: BOOTP failed, trying RARP/RPC...\n");
 222 #endif
 223
 224     /*
 225      * Use RARP to get our IP address.  This also sets our
 226      * netmask to the "natural" default for our address.
 227      */
 228     if (rarp_getipaddress(sock)) {
 229         printf("net_open: RARP failed\n");
 230         return (EIO);
 231     }
 232     printf("net_open: client addr: %s\n", inet_ntoa(myip));
 233
 234     /* Get our hostname, server IP address, gateway. */
 235     if (bp_whoami(sock)) {
 236         printf("net_open: bootparam/whoami RPC failed\n");
 237         return (EIO);
 238     }
 239     printf("net_open: client name: %s\n", hostname);
 240
 241     /*
 242      * Ignore the gateway from whoami (unreliable).
 243      * Use the "gateway" parameter instead.
 244      */
 245     smask = 0;
 246     gateip.s_addr = 0;
 247     if (bp_getfile(sock, "gateway", &gateip, buf) == 0) {
 248         /* Got it!  Parse the netmask. */
 249         smask = ip_convertaddr(buf);
 250     }
 251     if (smask) {
 252         netmask = smask;
 253         printf("net_open: subnet mask: %s\n", intoa(netmask));
 254     }
 255     if (gateip.s_addr)
 256         printf("net_open: net gateway: %s\n", inet_ntoa(gateip));
 257
 258     /* Get the root server and pathname. */
 259     if (bp_getfile(sock, "root", &rootip, rootpath)) {
 260         printf("net_open: bootparam/getfile RPC failed\n");
 261         return (EIO);
 262     }
 263  exit:
 264     /*
 265      * If present, strip the server's address off of the rootpath
 266      * before passing it along.  This allows us to be compatible with
 267      * the kernel's diskless (BOOTP_NFSROOT) booting conventions
 268      */
 269     for (i = 0; rootpath[i] != '\0' && i < FNAME_SIZE; i++)
 270             if (rootpath[i] == ':')
 271                     break;
 272     if (i && i != FNAME_SIZE && rootpath[i] == ':') {
 273             rootpath[i++] = '\0';
 274             if (inet_addr(&rootpath[0]) != INADDR_NONE)
 275                     rootip.s_addr = inet_addr(&rootpath[0]);
 276             memcpy(&temp[0], &rootpath[i], strlen(&rootpath[i])+1);
 277             memcpy(&rootpath[0], &temp[0], strlen(&rootpath[i])+1);
 278     }
 279     printf("net_open: server addr: %s\n", inet_ntoa(rootip));
 280     printf("net_open: server path: %s\n", rootpath);
 281
 282     d = socktodesc(sock);
 283     sprintf(temp, "%6D", d->myea, ":");
 284     setenv("boot.netif.ip", inet_ntoa(myip), 1);
 285     setenv("boot.netif.netmask", intoa(netmask), 1);
 286     setenv("boot.netif.gateway", inet_ntoa(gateip), 1);
 287     setenv("boot.netif.hwaddr", temp, 1);
 288     setenv("boot.nfsroot.server", inet_ntoa(rootip), 1);
 289     setenv("boot.nfsroot.path", rootpath, 1);
 290
 291     return (0);
 292 }
 293
 294 static void
 295 net_print(int verbose)
 296 {
 297     return;
 298 }