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/*
* Mach Operating System
* Copyright (c) 1993-1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 3/98
*
* Network IO.
*
* Packet filter code taken from vaxif/enet.c written
* CMU and Stanford.
*/
/* the code copied from device/net_io.c in Mach */
#include <string.h>
#include <arpa/inet.h>
#include <mach.h>
#include "vdev.h"
#include "ethernet.h"
io_return_t
dev_getstat(struct vether_device *ifp, dev_flavor_t flavor,
dev_status_t status, natural_t *count)
{
switch (flavor) {
case NET_FLAGS:
if (*count != 1)
return D_INVALID_SIZE;
status[0] = ifp->if_flags;
break;
case NET_STATUS:
{
struct net_status *ns = (struct net_status *)status;
if (*count < NET_STATUS_COUNT)
return (D_INVALID_OPERATION);
ns->min_packet_size = ifp->if_header_size;
ns->max_packet_size = ifp->if_header_size + ifp->if_mtu;
ns->header_format = ifp->if_header_format;
ns->header_size = ifp->if_header_size;
ns->address_size = ifp->if_address_size;
ns->flags = ifp->if_flags;
ns->mapped_size = 0;
*count = NET_STATUS_COUNT;
break;
}
case NET_ADDRESS:
{
int addr_byte_count;
int addr_int_count;
int i;
addr_byte_count = ifp->if_address_size;
addr_int_count = (addr_byte_count + (sizeof(int)-1))
/ sizeof(int);
if (*count < addr_int_count) {
return (D_INVALID_OPERATION);
}
memcpy(status, ifp->if_address, addr_byte_count);
if (addr_byte_count < addr_int_count * sizeof(int))
memset((char *)status + addr_byte_count, 0,
(addr_int_count * sizeof(int)
- addr_byte_count));
for (i = 0; i < addr_int_count; i++) {
int word;
word = status[i];
status[i] = htonl(word);
}
*count = addr_int_count;
break;
}
default:
return (D_INVALID_OPERATION);
}
return (D_SUCCESS);
}
static
int wants_all_multi_p (struct vether_device *v)
{
return !! (v->if_flags & IFF_ALLMULTI);
}
io_return_t
vdev_setstat (struct vether_device *ifp, dev_flavor_t flavor,
dev_status_t status, size_t count)
{
error_t err = 0;
short flags;
short delta;
switch (flavor) {
case NET_STATUS:
{
struct net_status *ns = (struct net_status *) status;
if (count != NET_STATUS_COUNT)
return D_INVALID_SIZE;
/* We allow only the flags to change. */
if (ns->min_packet_size != ifp->if_header_size
|| ns->max_packet_size != ifp->if_header_size + ifp->if_mtu
|| ns->header_format != ifp->if_header_format
|| ns->header_size != ifp->if_header_size
|| ns->address_size != ifp->if_address_size
|| ns->mapped_size != 0)
return D_INVALID_OPERATION;
flags = ns->flags;
goto change_flags;
}
case NET_FLAGS:
if (count != 1)
return D_INVALID_SIZE;
flags = status[0];
change_flags:
/* What needs to change? */
delta = flags ^ ifp->if_flags;
/* Only allow specific flag changes. */
if ((delta
/* AIUI IFF_RUNNING shouldn't be toggle-able, but we let this slip. */
& ~(IFF_UP | IFF_RUNNING | IFF_DEBUG | IFF_PROMISC | IFF_ALLMULTI))
!= 0)
return D_INVALID_OPERATION;
if (! err && (delta & IFF_PROMISC))
{
/* The ethernet device is always in promiscuous mode, and we
forward all packets. If this flag is cleared for a virtual
device, we should filter traffic based on observed MAC
addresses from this interface. */
/* XXX: Implement this. */
}
if (! err && (delta & IFF_ALLMULTI))
{
/* We activate IFF_ALLMULTI if at least one virtual device
wants it, and deactivate it otherwise. */
if ((flags & IFF_ALLMULTI)
|| foreach_dev_do (wants_all_multi_p))
err = eth_set_clear_flags (IFF_ALLMULTI, 0);
else
err = eth_set_clear_flags (0, IFF_ALLMULTI);
}
if (! err)
ifp->if_flags = flags;
break;
case NET_ADDRESS:
{
int addr_byte_count;
int addr_int_count;
int i;
addr_byte_count = ifp->if_address_size;
addr_int_count = (addr_byte_count + (sizeof(int)-1)) / sizeof(int);
if (count != addr_int_count)
return D_INVALID_SIZE;
memcpy(ifp->if_address, status, addr_byte_count);
for (i = 0; i < addr_int_count; i++) {
int word;
word = status[i];
status[i] = htonl(word);
}
break;
}
default:
return D_INVALID_OPERATION;
}
return err;
}
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