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e5539fb618
The new function operates similarly to ifconfig_lagg_get_lagg_status and likewise is accompanied by a function to free the bridge status data structure. I have included in this patch the relocation of some strings describing STP parameters and the PV2ID macro from ifconfig into net/if_bridgevar.h as they are useful for consumers of libifconfig. Reviewed by: kp, melifaro, mmacy Approved by: mmacy (mentor) MFC after: 1 week Relnotes: yes Differential Revision: https://reviews.freebsd.org/D25460
143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/*
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* Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_bridgevar.h>
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#include <net/route.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libifconfig.h"
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#include "libifconfig_internal.h"
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/* Internal structure used for allocations and frees */
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struct _ifconfig_bridge_status {
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struct ifconfig_bridge_status inner; /* wrapped bridge status */
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struct ifbropreq params; /* operational parameters */
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};
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static int
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ifconfig_bridge_ioctlwrap(ifconfig_handle_t *h, const char *name,
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unsigned long cmd, void *arg, size_t arglen, bool set)
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{
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struct ifdrv ifd = { 0 };
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unsigned long req = set ? SIOCSDRVSPEC : SIOCGDRVSPEC;
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strlcpy(ifd.ifd_name, name, sizeof(ifd.ifd_name));
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ifd.ifd_cmd = cmd;
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ifd.ifd_data = arg;
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ifd.ifd_len = arglen;
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return (ifconfig_ioctlwrap(h, AF_LOCAL, req, &ifd));
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}
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int
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ifconfig_bridge_get_bridge_status(ifconfig_handle_t *h,
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const char *name, struct ifconfig_bridge_status **bridgep)
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{
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struct ifbifconf members;
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struct ifbrparam cache_param;
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struct _ifconfig_bridge_status *bridge;
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char *buf;
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*bridgep = NULL;
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bridge = calloc(1, sizeof(struct _ifconfig_bridge_status));
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if (bridge == NULL) {
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h->error.errtype = OTHER;
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h->error.errcode = ENOMEM;
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return (-1);
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}
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bridge->inner.params = &bridge->params;
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if (ifconfig_bridge_ioctlwrap(h, name, BRDGGCACHE,
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&cache_param, sizeof(cache_param), false) != 0) {
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free(bridge);
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return (-1);
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}
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bridge->inner.cache_size = cache_param.ifbrp_csize;
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if (ifconfig_bridge_ioctlwrap(h, name, BRDGGTO,
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&cache_param, sizeof(cache_param), false) != 0) {
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free(bridge);
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return (-1);
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}
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bridge->inner.cache_lifetime = cache_param.ifbrp_ctime;
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if (ifconfig_bridge_ioctlwrap(h, name, BRDGPARAM,
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&bridge->params, sizeof(bridge->params), false) != 0) {
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free(bridge);
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return (-1);
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}
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members.ifbic_buf = NULL;
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for (size_t len = 8192;
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(buf = realloc(members.ifbic_buf, len)) != NULL;
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len *= 2) {
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members.ifbic_buf = buf;
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members.ifbic_len = len;
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if (ifconfig_bridge_ioctlwrap(h, name, BRDGGIFS,
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&members, sizeof(members), false) != 0) {
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free(buf);
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free(bridge);
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return (-1);
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}
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if (members.ifbic_len <= len)
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break;
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}
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if (buf == NULL) {
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free(members.ifbic_buf);
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free(bridge);
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h->error.errtype = OTHER;
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h->error.errcode = ENOMEM;
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return (-1);
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}
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bridge->inner.members = members.ifbic_req;
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bridge->inner.members_count =
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members.ifbic_len / sizeof(*members.ifbic_req);
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*bridgep = &bridge->inner;
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return (0);
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}
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void
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ifconfig_bridge_free_bridge_status(struct ifconfig_bridge_status *bridge)
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{
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if (bridge != NULL) {
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free(bridge->members);
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free(bridge);
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}
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}
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