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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/stream.h>
#include <net/bpf.h>
#include <net/bpfdesc.h>
#include <inet/ipnet.h>
/*
* This file implements the function calls for ipnet that translate the
* calls from BPF into the correct arguments and functions inside of the
* ipnet device.
*/
static const char *ipnet_bpf_name(uintptr_t);
static void ipnet_bpf_client_close(uintptr_t);
static const char *ipnet_bpf_client_name(uintptr_t);
static int ipnet_bpf_client_open(uintptr_t, uintptr_t *);
static void ipnet_bpf_close(uintptr_t);
static int ipnet_bpf_getdlt(uintptr_t, uint_t *);
static int ipnet_bpf_getlinkid(const char *, datalink_id_t *, zoneid_t);
static int ipnet_bpf_getzone(uintptr_t, zoneid_t *);
static int ipnet_bpf_open(const char *, uintptr_t *, zoneid_t);
static uintptr_t ipnet_bpf_promisc_add(uintptr_t, int, void *,
uintptr_t *, int);
static void ipnet_bpf_promisc_remove(uintptr_t);
static void ipnet_bpf_sdu_get(uintptr_t, uint_t *);
static int ipnet_bpf_tx(uintptr_t, mblk_t *);
static int ipnet_bpf_type(uintptr_t);
bpf_provider_t bpf_ipnet = {
BPR_IPNET,
ipnet_bpf_open,
ipnet_bpf_close,
ipnet_bpf_name,
ipnet_bpf_type,
ipnet_bpf_sdu_get,
ipnet_bpf_tx,
ipnet_bpf_promisc_add,
ipnet_bpf_promisc_remove,
ipnet_bpf_getlinkid,
ipnet_bpf_client_close,
ipnet_bpf_client_name,
ipnet_bpf_client_open,
ipnet_bpf_getzone,
ipnet_bpf_getdlt,
};
/*ARGSUSED*/
static int
ipnet_bpf_open(const char *name, uintptr_t *mhandlep, zoneid_t zoneid)
{
if (zoneid == ALL_ZONES)
zoneid = GLOBAL_ZONEID;
return (ipnet_open_byname(name, (ipnetif_t **)mhandlep, zoneid));
}
/*ARGSUSED*/
static void
ipnet_bpf_close(uintptr_t mhandle)
{
ipnet_close_byhandle((ipnetif_t *)mhandle);
}
static const char *
ipnet_bpf_name(uintptr_t mhandle)
{
return (ipnet_name((ipnetif_t *)mhandle));
}
/*ARGSUSED*/
static int
ipnet_bpf_type(uintptr_t mhandle)
{
return (DL_IPNET);
}
/*ARGSUSED*/
static void
ipnet_bpf_sdu_get(uintptr_t mhandle, uint_t *mtup)
{
/*
* The choice of 65535 is arbitrary, it could be any smaller number
* but it does matche the current default choice of libpcap as the
* packet snap size.
*/
*mtup = 65535;
}
/*ARGSUSED*/
static int
ipnet_bpf_tx(uintptr_t chandle, mblk_t *pkt)
{
/*
* It is not clear what it would mean to send an ipnet packet,
* especially since the ipnet device has been implemented to be
* an observation (read-only) instrument. Thus a call to send a
* packet using ipnet results in the packet being free'd and an
* error returned.
*/
freemsg(pkt);
return (EBADF);
}
/*
* BPF does not provide the means to select which SAP is being sniffed,
* so for the purpose of ipnet, all BPF clients are in SAP promiscuous
* mode.
*/
static uintptr_t
ipnet_bpf_promisc_add(uintptr_t chandle, int how, void *arg,
uintptr_t *promisc, int flags)
{
int newhow;
/*
* Map the mac values into ipnet values.
*/
switch (how) {
case MAC_CLIENT_PROMISC_ALL :
newhow = DL_PROMISC_PHYS;
flags = IPNET_PROMISC_PHYS|IPNET_PROMISC_SAP;
break;
case MAC_CLIENT_PROMISC_MULTI :
newhow = DL_PROMISC_MULTI;
flags = IPNET_PROMISC_MULTI|IPNET_PROMISC_SAP;
break;
default :
newhow = 0;
break;
}
return (ipnet_promisc_add((void *)chandle, newhow,
arg, promisc, flags));
}
static void
ipnet_bpf_promisc_remove(uintptr_t phandle)
{
ipnet_promisc_remove((void *)phandle);
}
static int
ipnet_bpf_client_open(uintptr_t mhandle, uintptr_t *chandlep)
{
return (ipnet_client_open((ipnetif_t *)mhandle,
(ipnetif_t **)chandlep));
}
/*ARGSUSED*/
static void
ipnet_bpf_client_close(uintptr_t chandle)
{
ipnet_client_close((ipnetif_t *)chandle);
}
static const char *
ipnet_bpf_client_name(uintptr_t chandle)
{
return (ipnet_bpf_name(chandle));
}
static int
ipnet_bpf_getlinkid(const char *name, datalink_id_t *idp, zoneid_t zoneid)
{
uint_t index;
int error;
ipnet_stack_t *ips;
VERIFY((ips = ipnet_find_by_zoneid(zoneid)) != NULL);
index = 0;
mutex_enter(&ips->ips_event_lock);
error = ipnet_get_linkid_byname(name, &index, zoneid);
mutex_exit(&ips->ips_event_lock);
if (error == 0)
*idp = (datalink_id_t)index;
ipnet_rele(ips);
return (error);
}
static int
ipnet_bpf_getzone(uintptr_t handle, zoneid_t *zip)
{
ipnetif_t *ipnetif;
ipnetif = (ipnetif_t *)handle;
*zip = ipnetif->if_zoneid;
return (0);
}
/*ARGSUSED*/
static int
ipnet_bpf_getdlt(uintptr_t handle, uint_t *dlp)
{
*dlp = DL_IPNET;
return (0);
}
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