Detection of interface type by filter must happen before detection of interface type by prefix. Else the following sequence of commands will try to create a LAGG interface instead of a VLAN interface, which accidentially worked previously, because the date pointed to by the ifr_data pointer was not parsed by VLAN create ioctl(2). This is a regression after r368229, because the VLAN creation now parses the ifr_data field. How to reproduce: # ifconfig lagg0 create # ifconfig lagg0.256 create Differential Revision: https://reviews.freebsd.org/D27521 Reviewed by: kib@ and kevans@ Reported by: raul.munoz@custos.es Sponsored by: Mellanox Technologies // NVIDIA Networking
207 lines
5.3 KiB
C
207 lines
5.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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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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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <err.h>
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#include <libifconfig.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "ifconfig.h"
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typedef enum {
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MT_PREFIX,
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MT_FILTER,
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} clone_match_type;
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static void
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list_cloners(void)
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{
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ifconfig_handle_t *lifh;
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char *cloners;
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size_t cloners_count;
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lifh = ifconfig_open();
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if (lifh == NULL)
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return;
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if (ifconfig_list_cloners(lifh, &cloners, &cloners_count) < 0)
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errc(1, ifconfig_err_errno(lifh), "unable to list cloners");
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ifconfig_close(lifh);
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for (const char *name = cloners;
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name < cloners + cloners_count * IFNAMSIZ;
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name += IFNAMSIZ) {
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if (name > cloners)
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putchar(' ');
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printf("%s", name);
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}
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putchar('\n');
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free(cloners);
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}
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struct clone_defcb {
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union {
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char ifprefix[IFNAMSIZ];
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clone_match_func *ifmatch;
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};
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clone_match_type clone_mt;
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clone_callback_func *clone_cb;
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SLIST_ENTRY(clone_defcb) next;
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};
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static SLIST_HEAD(, clone_defcb) clone_defcbh =
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SLIST_HEAD_INITIALIZER(clone_defcbh);
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void
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clone_setdefcallback_prefix(const char *ifprefix, clone_callback_func *p)
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{
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struct clone_defcb *dcp;
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dcp = malloc(sizeof(*dcp));
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strlcpy(dcp->ifprefix, ifprefix, IFNAMSIZ-1);
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dcp->clone_mt = MT_PREFIX;
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dcp->clone_cb = p;
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SLIST_INSERT_HEAD(&clone_defcbh, dcp, next);
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}
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void
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clone_setdefcallback_filter(clone_match_func *filter, clone_callback_func *p)
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{
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struct clone_defcb *dcp;
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dcp = malloc(sizeof(*dcp));
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dcp->ifmatch = filter;
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dcp->clone_mt = MT_FILTER;
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dcp->clone_cb = p;
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SLIST_INSERT_HEAD(&clone_defcbh, dcp, next);
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}
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/*
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* Do the actual clone operation. Any parameters must have been
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* setup by now. If a callback has been setup to do the work
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* then defer to it; otherwise do a simple create operation with
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* no parameters.
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*/
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static void
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ifclonecreate(int s, void *arg)
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{
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struct ifreq ifr;
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struct clone_defcb *dcp;
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memset(&ifr, 0, sizeof(ifr));
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(void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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/* Try to find a default callback by filter */
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SLIST_FOREACH(dcp, &clone_defcbh, next) {
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if (dcp->clone_mt == MT_FILTER &&
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dcp->ifmatch(ifr.ifr_name) != 0)
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break;
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}
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if (dcp == NULL) {
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/* Try to find a default callback by prefix */
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SLIST_FOREACH(dcp, &clone_defcbh, next) {
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if (dcp->clone_mt == MT_PREFIX &&
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strncmp(dcp->ifprefix, ifr.ifr_name,
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strlen(dcp->ifprefix)) == 0)
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break;
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}
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}
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if (dcp == NULL || dcp->clone_cb == NULL) {
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/* NB: no parameters */
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ioctl_ifcreate(s, &ifr);
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} else {
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dcp->clone_cb(s, &ifr);
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}
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/*
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* If we get a different name back than we put in, update record and
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* indicate it should be printed later.
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*/
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if (strncmp(name, ifr.ifr_name, sizeof(name)) != 0) {
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strlcpy(name, ifr.ifr_name, sizeof(name));
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printifname = 1;
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}
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}
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static
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DECL_CMD_FUNC(clone_create, arg, d)
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{
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callback_register(ifclonecreate, NULL);
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}
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static
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DECL_CMD_FUNC(clone_destroy, arg, d)
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{
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(void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
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if (ioctl(s, SIOCIFDESTROY, &ifr) < 0)
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err(1, "SIOCIFDESTROY");
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}
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static struct cmd clone_cmds[] = {
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DEF_CLONE_CMD("create", 0, clone_create),
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DEF_CMD("destroy", 0, clone_destroy),
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DEF_CLONE_CMD("plumb", 0, clone_create),
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DEF_CMD("unplumb", 0, clone_destroy),
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};
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static void
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clone_Copt_cb(const char *optarg __unused)
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{
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list_cloners();
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exit(exit_code);
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}
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static struct option clone_Copt = { .opt = "C", .opt_usage = "[-C]", .cb = clone_Copt_cb };
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static __constructor void
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clone_ctor(void)
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{
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size_t i;
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for (i = 0; i < nitems(clone_cmds); i++)
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cmd_register(&clone_cmds[i]);
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opt_register(&clone_Copt);
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}
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