7e0bba4d80
This requires moving net.link.generic sysctl declaration from if_mib.c to if.c. Ideally if_mib.c needs just to be merged to if.c, but they have different license texts. Differential revision: https://reviews.freebsd.org/D33263
145 lines
4.3 KiB
C
145 lines
4.3 KiB
C
/*-
|
|
* Copyright 1996 Massachusetts Institute of Technology
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and
|
|
* its documentation for any purpose and without fee is hereby
|
|
* granted, provided that both the above copyright notice and this
|
|
* permission notice appear in all copies, that both the above
|
|
* copyright notice and this permission notice appear in all
|
|
* supporting documentation, and that the name of M.I.T. not be used
|
|
* in advertising or publicity pertaining to distribution of the
|
|
* software without specific, written prior permission. M.I.T. makes
|
|
* no representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied
|
|
* warranty.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
|
|
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
|
|
* SHALL M.I.T. 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_var.h>
|
|
#include <net/if_mib.h>
|
|
#include <net/vnet.h>
|
|
|
|
/*
|
|
* A sysctl(3) MIB for generic interface information. This information
|
|
* is exported in the net.link.generic branch, which has the following
|
|
* structure:
|
|
*
|
|
* net.link.generic .system - system-wide control variables
|
|
* and statistics (node)
|
|
* .ifdata.<ifindex>.general
|
|
* - what's in `struct ifdata'
|
|
* plus some other info
|
|
* .ifdata.<ifindex>.linkspecific
|
|
* - a link-type-specific data
|
|
* structure (as might be used
|
|
* by an SNMP agent
|
|
*
|
|
* Perhaps someday we will make addresses accessible via this interface
|
|
* as well (then there will be four such...). The reason that the
|
|
* index comes before the last element in the name is because it
|
|
* seems more orthogonal that way, particularly with the possibility
|
|
* of other per-interface data living down here as well (e.g., integrated
|
|
* services stuff).
|
|
*/
|
|
|
|
static int
|
|
sysctl_ifdata(SYSCTL_HANDLER_ARGS) /* XXX bad syntax! */
|
|
{
|
|
int *name = (int *)arg1;
|
|
int error;
|
|
u_int namelen = arg2;
|
|
struct ifnet *ifp;
|
|
struct ifmibdata ifmd;
|
|
struct epoch_tracker et;
|
|
size_t dlen;
|
|
char *dbuf;
|
|
|
|
if (namelen != 2)
|
|
return EINVAL;
|
|
if (name[0] <= 0)
|
|
return (ENOENT);
|
|
NET_EPOCH_ENTER(et);
|
|
ifp = ifnet_byindex_ref(name[0]);
|
|
NET_EPOCH_EXIT(et);
|
|
if (ifp == NULL)
|
|
return (ENOENT);
|
|
|
|
switch(name[1]) {
|
|
default:
|
|
error = ENOENT;
|
|
goto out;
|
|
|
|
case IFDATA_GENERAL:
|
|
bzero(&ifmd, sizeof(ifmd));
|
|
strlcpy(ifmd.ifmd_name, ifp->if_xname, sizeof(ifmd.ifmd_name));
|
|
|
|
ifmd.ifmd_pcount = ifp->if_pcount;
|
|
if_data_copy(ifp, &ifmd.ifmd_data);
|
|
|
|
ifmd.ifmd_flags = ifp->if_flags | ifp->if_drv_flags;
|
|
ifmd.ifmd_snd_len = ifp->if_snd.ifq_len;
|
|
ifmd.ifmd_snd_maxlen = ifp->if_snd.ifq_maxlen;
|
|
ifmd.ifmd_snd_drops =
|
|
ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
|
|
|
|
error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);
|
|
if (error)
|
|
goto out;
|
|
break;
|
|
|
|
case IFDATA_LINKSPECIFIC:
|
|
error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);
|
|
if (error || !req->newptr)
|
|
goto out;
|
|
break;
|
|
|
|
case IFDATA_DRIVERNAME:
|
|
/* 20 is enough for 64bit ints */
|
|
dlen = strlen(ifp->if_dname) + 20 + 1;
|
|
if ((dbuf = malloc(dlen, M_TEMP, M_NOWAIT)) == NULL) {
|
|
error = ENOMEM;
|
|
goto out;
|
|
}
|
|
if (ifp->if_dunit == IF_DUNIT_NONE)
|
|
strcpy(dbuf, ifp->if_dname);
|
|
else
|
|
sprintf(dbuf, "%s%d", ifp->if_dname, ifp->if_dunit);
|
|
|
|
error = SYSCTL_OUT(req, dbuf, strlen(dbuf) + 1);
|
|
if (error == 0 && req->newptr != NULL)
|
|
error = EPERM;
|
|
free(dbuf, M_TEMP);
|
|
goto out;
|
|
}
|
|
out:
|
|
if_rele(ifp);
|
|
return error;
|
|
}
|
|
|
|
SYSCTL_DECL(_net_link_generic);
|
|
static SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata,
|
|
CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_ifdata,
|
|
"Interface table");
|