mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-29 21:52:45 +00:00
646cf5017b
identifier to the DHCP server. Now you can check for this string in your dhcp configuration to decide whether you will hand out a lease to the client or not.
287 lines
7.7 KiB
C
287 lines
7.7 KiB
C
/*
|
|
* $FreeBSD$
|
|
* From: $NetBSD: dev_net.c,v 1.12 1997/12/10 20:38:37 gwr Exp $
|
|
*/
|
|
|
|
/*-
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* 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 code. This interface
|
|
* does not support any "block" access, and exists only for the
|
|
* purpose of initializing the network interface, getting boot
|
|
* parameters, and performing the NFS mount.
|
|
*
|
|
* At open time, this does:
|
|
*
|
|
* find interface - netif_open()
|
|
* RARP for IP address - rarp_getipaddress()
|
|
* RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
|
|
* RPC/mountd - nfs_mount(sock, ip, path)
|
|
*
|
|
* the root file handle from mountd is saved in a global
|
|
* for use by the NFS open code (NFS/lookup).
|
|
*/
|
|
|
|
#include <machine/stdarg.h>
|
|
#include <sys/param.h>
|
|
#include <sys/socket.h>
|
|
#include <net/if.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
|
|
#include <stand.h>
|
|
#include <string.h>
|
|
#include <net.h>
|
|
#include <netif.h>
|
|
#include <bootp.h>
|
|
#include <bootparam.h>
|
|
|
|
#include "dev_net.h"
|
|
#include "bootstrap.h"
|
|
|
|
int debug = 0;
|
|
|
|
static int netdev_sock = -1;
|
|
static int netdev_opens;
|
|
|
|
static int net_init(void);
|
|
static int net_open(struct open_file *, ...);
|
|
static int net_close(struct open_file *);
|
|
static int net_strategy();
|
|
|
|
static int net_getparams(int sock);
|
|
|
|
struct devsw netdev = {
|
|
"net",
|
|
DEVT_NET,
|
|
net_init,
|
|
net_strategy,
|
|
net_open,
|
|
net_close,
|
|
noioctl
|
|
};
|
|
|
|
int
|
|
net_init(void)
|
|
{
|
|
return 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.
|
|
* This is declared with variable arguments...
|
|
*/
|
|
int
|
|
net_open(struct open_file *f, ...)
|
|
{
|
|
va_list args;
|
|
char *devname; /* Device part of file name (or NULL). */
|
|
int error = 0;
|
|
|
|
va_start(args, f);
|
|
devname = va_arg(args, char*);
|
|
va_end(args);
|
|
|
|
/* On first open, do netif open, mount, etc. */
|
|
if (netdev_opens == 0) {
|
|
/* Find network interface. */
|
|
if (netdev_sock < 0) {
|
|
netdev_sock = netif_open(devname);
|
|
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 */
|
|
netif_close(netdev_sock);
|
|
netdev_sock = -1;
|
|
return (error);
|
|
}
|
|
}
|
|
netdev_opens++;
|
|
}
|
|
netdev_opens++;
|
|
f->f_devdata = &netdev_sock;
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
net_close(f)
|
|
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");
|
|
netif_close(netdev_sock);
|
|
netdev_sock = -1;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
net_strategy()
|
|
{
|
|
return EIO;
|
|
}
|
|
|
|
#define SUPPORT_BOOTP
|
|
|
|
/*
|
|
* Get info for NFS boot: our IP address, our hostname,
|
|
* server IP address, and our root path on the server.
|
|
* There are two ways to do this: The old, Sun way,
|
|
* and the more modern, BOOTP way. (RFC951, RFC1048)
|
|
*
|
|
* The default is to use the Sun bootparams RPC
|
|
* (because that is what the kernel will do).
|
|
* MD code can make try_bootp initialied data,
|
|
* which will override this common definition.
|
|
*/
|
|
#ifdef SUPPORT_BOOTP
|
|
int try_bootp = 1;
|
|
#endif
|
|
|
|
extern n_long ip_convertaddr(char *p);
|
|
|
|
static int
|
|
net_getparams(sock)
|
|
int sock;
|
|
{
|
|
char buf[MAXHOSTNAMELEN];
|
|
char temp[FNAME_SIZE];
|
|
int i;
|
|
n_long smask;
|
|
|
|
#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.
|
|
*/
|
|
if (try_bootp)
|
|
bootp(sock, BOOTP_NONE);
|
|
if (myip.s_addr != 0)
|
|
goto exit;
|
|
if (debug)
|
|
printf("net_open: BOOTP failed, trying RARP/RPC...\n");
|
|
#endif
|
|
|
|
/*
|
|
* Use RARP to get our IP address. This also sets our
|
|
* netmask to the "natural" default for our address.
|
|
*/
|
|
if (rarp_getipaddress(sock)) {
|
|
printf("net_open: RARP failed\n");
|
|
return (EIO);
|
|
}
|
|
printf("net_open: client addr: %s\n", inet_ntoa(myip));
|
|
|
|
/* Get our hostname, server IP address, gateway. */
|
|
if (bp_whoami(sock)) {
|
|
printf("net_open: bootparam/whoami RPC failed\n");
|
|
return (EIO);
|
|
}
|
|
printf("net_open: client name: %s\n", hostname);
|
|
|
|
/*
|
|
* Ignore the gateway from whoami (unreliable).
|
|
* Use the "gateway" parameter instead.
|
|
*/
|
|
smask = 0;
|
|
gateip.s_addr = 0;
|
|
if (bp_getfile(sock, "gateway", &gateip, buf) == 0) {
|
|
/* Got it! Parse the netmask. */
|
|
smask = ip_convertaddr(buf);
|
|
}
|
|
if (smask) {
|
|
netmask = smask;
|
|
printf("net_open: subnet mask: %s\n", intoa(netmask));
|
|
}
|
|
if (gateip.s_addr)
|
|
printf("net_open: net gateway: %s\n", inet_ntoa(gateip));
|
|
|
|
/* Get the root server and pathname. */
|
|
if (bp_getfile(sock, "root", &rootip, rootpath)) {
|
|
printf("net_open: bootparam/getfile RPC failed\n");
|
|
return (EIO);
|
|
}
|
|
exit:
|
|
printf("net_open: server addr: %s\n", inet_ntoa(rootip));
|
|
|
|
/*
|
|
* If present, strip the server's address off of the rootpath
|
|
* before passing it along. This allows us to be compatible with
|
|
* the kernel's diskless (BOOTP_NFSROOT) booting conventions
|
|
*/
|
|
|
|
for(i=0; i<FNAME_SIZE; i++)
|
|
if(rootpath[i] == ':')
|
|
break;
|
|
if(i && i != FNAME_SIZE) {
|
|
i++;
|
|
bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1);
|
|
bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1);
|
|
}
|
|
printf("net_open: server path: %s\n", rootpath);
|
|
return (0);
|
|
}
|