NetBSD/sys/arch/i386/stand/netboot/dev_net.c

/*	$NetBSD: dev_net.c,v 1.1.1.1 1997/03/14 02:40:30 perry Exp $	*/

/*
 * Copyright (c) 1995 Gordon W. Ross
 * All rights reserved.
 * Copyright (c) 1996
 *	Matthias Drochner.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 * 4. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Gordon W. Ross
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* network device for libsa
 supports BOOTP, RARP and BOOTPARAM
 */

#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/in_systm.h>

#include <lib/libsa/stand.h>
#include <lib/libsa/net.h>
#include <lib/libsa/bootparam.h>

#include <netif/netif_small.h>

#ifdef SUPPORT_BOOTP
void bootp __P((int));
#endif

struct	in_addr myip;  /* init'ed as INADDR_ANY */
struct in_addr rootip, gateip, swapip, nameip;
n_long netmask;

char rootpath[FNAME_SIZE];
char bootfile[FNAME_SIZE];

char	hostname[FNAME_SIZE];		/* our hostname */
int	hostnamelen;

#if defined(SUPPORT_BOOTP) || defined (SUPPORT_BOOTPARAM)
char	domainname[FNAME_SIZE];		/* our DNS domain, not used */
int	domainnamelen;
#endif

u_char bcea[6] = BA;

static int netdev_sock;
static int open_count;

int no_bootp = 0;

/*
 * Called by devopen after it sets f->f_dev to our devsw entry.
 * This opens the low-level device and sets f->f_devdata.
 */
int
net_open(f, devname)
struct open_file *f;
char *devname;		/* Device part of file name (or NULL). */
{
  int error = 0;
  /* On first open, do netif open */
  if (open_count == 0) {

    /* Find network interface. */
    if ((netdev_sock = netif_open(devname)) < 0)
      return (ENXIO);

#ifdef SUPPORT_BOOTP
    if(!no_bootp){
      printf("configure network...trying bootp\n");
      /* Get boot info using BOOTP way. (RFC951, RFC1048) */
      bootp(netdev_sock);
    }
#endif

    if(myip.s_addr != INADDR_ANY){  /* got bootp reply or manually set*/

#ifdef TFTP_HACK
      int num, i;
      /* XXX (some) tftp servers don't like leading "/" */
      for(num = 0; bootfile[num] == '/'; num++);
      for(i=0; bootfile[i] = bootfile[i + num]; i++);
#endif

      printf("boot: client IP address: %s\n", inet_ntoa(myip));
      printf("boot: client name: %s\n", hostname);
    } else {

#ifdef SUPPORT_RARP
      /* no answer,
       Get boot info using RARP and Sun bootparams. */
       printf("configure network...trying rarp\n");

       /* Get our IP address.  (rarp.c) */
       if (rarp_getipaddress(netdev_sock)){
	 error=EIO;
	 goto bad;
       }
       printf("boot: client IP address: %s\n", inet_ntoa(myip));

#ifdef SUPPORT_BOOTPARAM
       /* Get our hostname, server IP address. */
       if (!bp_whoami(netdev_sock)){
	 printf("boot: client name: %s\n", hostname);

	 /* Get the root pathname. */
	 bp_getfile(netdev_sock, "root", &rootip, rootpath);
       }
#else
       /* else
	fallback: use rarp server address */
#endif

#else /* no SUPPORT_RARP */
       error=EIO;
       goto bad;
#endif

    }
    printf("boot: server: %s, rootpath: %s, bootfile: %s\n",
	   inet_ntoa(rootip), rootpath, bootfile);
  }
  open_count++;
  f->f_devdata = &netdev_sock;
  return (error);

  bad:
    printf("net_open failed\n");
    netif_close(netdev_sock);
    return(error);
}

int
net_close(f)
struct open_file *f;
{
    /* On last close, do netif close, etc. */
    if (--open_count == 0)
	netif_close(netdev_sock);
#ifdef DEBUG
    if(open_count < 0) panic("net_close");
#endif
    f->f_devdata = NULL;

    return(0);
}

int
net_ioctl(f, c, d)
struct open_file *f;
u_long c;
void *d;
{
    return EIO;
}

int
net_strategy(d, f, b, s, buf, r)
void *d;
int f;
daddr_t b;
size_t s;
void *buf;
size_t *r;
{
    return EIO;
}