/*
* Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_bridgevar.h>
#include <net/route.h>
#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include "libifconfig.h"
#include "libifconfig_internal.h"
/* Internal structure used for allocations and frees */
struct _ifconfig_bridge_status {
struct ifconfig_bridge_status inner; /* wrapped bridge status */
struct ifbropreq params; /* operational parameters */
};
static int
ifconfig_bridge_ioctlwrap(ifconfig_handle_t *h, const char *name,
unsigned long cmd, void *arg, size_t arglen, bool set)
{
struct ifdrv ifd = { 0 };
unsigned long req = set ? SIOCSDRVSPEC : SIOCGDRVSPEC;
strlcpy(ifd.ifd_name, name, sizeof(ifd.ifd_name));
ifd.ifd_cmd = cmd;
ifd.ifd_data = arg;
ifd.ifd_len = arglen;
return (ifconfig_ioctlwrap(h, AF_LOCAL, req, &ifd));
}
int
ifconfig_bridge_get_bridge_status(ifconfig_handle_t *h,
const char *name, struct ifconfig_bridge_status **bridgep)
{
struct ifbifconf members;
struct ifbrparam cache_param;
struct _ifconfig_bridge_status *bridge;
char *buf;
*bridgep = NULL;
bridge = calloc(1, sizeof(struct _ifconfig_bridge_status));
if (bridge == NULL) {
h->error.errtype = OTHER;
h->error.errcode = ENOMEM;
return (-1);
}
bridge->inner.params = &bridge->params;
if (ifconfig_bridge_ioctlwrap(h, name, BRDGGCACHE,
&cache_param, sizeof(cache_param), false) != 0) {
free(bridge);
return (-1);
}
bridge->inner.cache_size = cache_param.ifbrp_csize;
if (ifconfig_bridge_ioctlwrap(h, name, BRDGGTO,
&cache_param, sizeof(cache_param), false) != 0) {
free(bridge);
return (-1);
}
bridge->inner.cache_lifetime = cache_param.ifbrp_ctime;
if (ifconfig_bridge_ioctlwrap(h, name, BRDGPARAM,
&bridge->params, sizeof(bridge->params), false) != 0) {
free(bridge);
return (-1);
}
members.ifbic_buf = NULL;
for (size_t len = 8192;
(buf = realloc(members.ifbic_buf, len)) != NULL;
len *= 2) {
members.ifbic_buf = buf;
members.ifbic_len = len;
if (ifconfig_bridge_ioctlwrap(h, name, BRDGGIFS,
&members, sizeof(members), false) != 0) {
free(buf);
free(bridge);
return (-1);
}
if (members.ifbic_len <= len)
break;
}
if (buf == NULL) {
free(members.ifbic_buf);
free(bridge);
h->error.errtype = OTHER;
h->error.errcode = ENOMEM;
return (-1);
}
bridge->inner.members = members.ifbic_req;
bridge->inner.members_count =
members.ifbic_len / sizeof(*members.ifbic_req);
*bridgep = &bridge->inner;
return (0);
}
void
ifconfig_bridge_free_bridge_status(struct ifconfig_bridge_status *bridge)
{
if (bridge != NULL) {
free(bridge->members);
free(bridge);
}
}
