/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Gordon W. Ross.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* This module implements a "raw device" interface suitable for
* use by the stand-alone I/O library NFS and TFTP code. This interface
* does not support any "block" access, and exists only for the
* purpose of initializing the network interface and getting boot
* parameters.
*
* At open time, this does:
*
* find interface - netif_open()
* BOOTP for IP address - bootp()
*/
static int netdev_sock = -1;
static int netdev_opens;
static int net_getparams(int sock);
/*
* Called by devopen after it sets f->f_dev to our devsw entry.
* This opens the low-level device and sets f->f_devdata.
* This is declared with variable arguments...
*/
int
net_open(struct open_file *f, ...)
{
int error = 0;
#ifdef NETIF_DEBUG
if (debug)
printf("net_open\n");
#endif
/* On first open, do netif open, mount, etc. */
if (netdev_opens == 0) {
/* Find network interface. */
if (netdev_sock < 0) {
netdev_sock = pxe_netif_open();
if (netdev_sock < 0) {
printf("net_open: netif_open() failed\n");
return (ENXIO);
}
if (debug)
printf("net_open: netif_open() succeeded\n");
}
if (rootip.s_addr == 0) {
/* Get root IP address, and path, etc. */
error = net_getparams(netdev_sock);
if (error) {
/* getparams makes its own noise */
pxe_netif_close(netdev_sock);
netdev_sock = -1;
return (error);
}
}
}
netdev_opens++;
f->f_devdata = &netdev_sock;
return (error);
}
int
net_close(struct open_file *f)
{
#ifdef NETIF_DEBUG
if (debug)
printf("net_close: opens=%d\n", netdev_opens);
#endif
/* On last close, do netif close, etc. */
f->f_devdata = NULL;
/* Extra close call? */
if (netdev_opens <= 0)
return (0);
netdev_opens--;
/* Not last close? */
if (netdev_opens > 0)
return(0);
rootip.s_addr = 0;
if (netdev_sock >= 0) {
if (debug)
printf("net_close: calling netif_close()\n");
pxe_netif_close(netdev_sock);
netdev_sock = -1;
}
return (0);
}
int
net_strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf, size_t *rsize)
{
return EIO;
}
/*
* Get info for network boot: our IP address, our hostname,
* server IP address, and our root path on the server.
*/
#ifdef SUPPORT_BOOTP
int bootp(int sock);
#endif
static int
net_getparams(int sock)
{
#ifdef SUPPORT_BOOTP
/*
* Try to get boot info using BOOTP. If we succeed, then
* the server IP address, gateway, and root path will all
* be initialized. If any remain uninitialized, we will
* use RARP and RPC/bootparam (the Sun way) to get them.
*/
bootp(sock);
if (myip.s_addr != 0)
return (0);
if (debug)
printf("net_open: BOOTP failed\n");
#endif
