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/* ulogd_filter_IFINDEX.c, Version $Revision: 1500 $
*
* ulogd interpreter plugin for ifindex to ifname conversion
*
* (C) 2005 by Harald Welte <laforge@gnumonks.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: ulogd_filter_IFINDEX.c 1500 2005-10-03 16:54:02Z laforge $
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <ulogd/ulogd.h>
#include "rtnl.h"
#include "iftable.h"
static struct ulogd_key ifindex_keys[] = {
{
.type = ULOGD_RET_STRING,
.flags = ULOGD_RETF_NONE,
.name = "oob.in",
},
{
.type = ULOGD_RET_STRING,
.flags = ULOGD_RETF_NONE,
.name = "oob.out",
},
};
static struct ulogd_key ifindex_inp[] = {
{
.type = ULOGD_RET_UINT32,
.name = "oob.ifindex_in",
},
{
.type = ULOGD_RET_UINT32,
.name = "oob.ifindex_out",
},
};
static int interp_ifindex(struct ulogd_pluginstance *pi)
{
struct ulogd_key *ret = pi->output;
struct ulogd_key *inp = pi->input;
ret[0].u.value.ptr = ifindex_2name(inp[0].u.source->u.value.ui32);
ret[0].flags |= ULOGD_RETF_VALID;
ret[1].u.value.ptr = ifindex_2name(inp[1].u.source->u.value.ui32);
ret[1].flags |= ULOGD_RETF_VALID;
return 0;
}
/* we only need one global static cache of ifindex to ifname mappings,
* so all state is global (as opposed to per-instance local state in almost
* all other plugins */
static struct ulogd_fd rtnl_fd = { .fd = -1 };
static int rtnl_users;
static int rtnl_read_cb(int fd, unsigned int what, void *param)
{
if (!(what & ULOGD_FD_READ))
return 0;
rtnl_receive();
}
static int ifindex_start(struct ulogd_pluginstance *upi)
{
int rc;
/* if we're already initialized, inc usage count and exit */
if (rtnl_fd.fd >= 0) {
rtnl_users++;
return 0;
}
/* if we reach here, we need to initialize */
rtnl_fd.fd = rtnl_init();
if (rtnl_fd.fd < 0)
return rtnl_fd.fd;
rc = iftable_init();
if (rc < 0)
goto out_rtnl;
rtnl_fd.when = ULOGD_FD_READ;
rtnl_fd.cb = &rtnl_read_cb;
rc = ulogd_register_fd(&rtnl_fd);
if (rc < 0)
goto out_iftable;
rtnl_users++;
return 0;
out_iftable:
iftable_fini();
out_rtnl:
rtnl_fini();
rtnl_fd.fd = -1;
return rc;
}
static int ifindex_fini(struct ulogd_pluginstance *upi)
{
if (--rtnl_users == 0) {
ulogd_unregister_fd(&rtnl_fd);
iftable_fini();
rtnl_fini();
rtnl_fd.fd = -1;
}
return 0;
}
static struct ulogd_plugin ifindex_plugin = {
.name = "IFINDEX",
.input = {
.keys = ifindex_inp,
.num_keys = ARRAY_SIZE(ifindex_inp),
.type = ULOGD_DTYPE_PACKET,
},
.output = {
.keys = ifindex_keys,
.num_keys = ARRAY_SIZE(ifindex_keys),
.type = ULOGD_DTYPE_PACKET,
},
.interp = &interp_ifindex,
.start = &ifindex_start,
.stop = &ifindex_fini,
};
void __attribute__ ((constructor)) init(void);
void init(void)
{
ulogd_register_plugin(&ifindex_plugin);
}
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