7fa282e616
It is hard to reason about the contents of 'ifr' at any given time as nearly every function sets random fields or pointers in this structure. Use local on-stack clean 'struct ifreq' for each function instead. Reviewed by: kp Differential Revision: https://reviews.freebsd.org/D40534 MFC after: 2 weeks
317 lines
8.8 KiB
C
317 lines
8.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 1999 Bill Paul <wpaul@ctr.columbia.edu>
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* Copyright (c) 2012 ADARA Networks, Inc.
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* All rights reserved.
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*
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* Portions of this software were developed by Robert N. M. Watson under
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* contract to ADARA Networks, Inc.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-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 Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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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 <sys/socket.h>
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#include <sys/sockio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_vlan_var.h>
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#include <net/route.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <err.h>
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#include <errno.h>
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#include "ifconfig.h"
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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#define NOTAG ((u_short) -1)
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static const char proto_8021Q[] = "802.1q";
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static const char proto_8021ad[] = "802.1ad";
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static const char proto_qinq[] = "qinq";
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static struct vlanreq params = {
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.vlr_tag = NOTAG,
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.vlr_proto = ETHERTYPE_VLAN,
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};
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static void
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vlan_status(if_ctx *ctx)
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{
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struct vlanreq vreq = {};
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struct ifreq ifr = { .ifr_data = (caddr_t)&vreq };
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if (ioctl_ctx_ifr(ctx, SIOCGETVLAN, &ifr) == -1)
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return;
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printf("\tvlan: %d", vreq.vlr_tag);
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printf(" vlanproto: ");
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switch (vreq.vlr_proto) {
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case ETHERTYPE_VLAN:
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printf(proto_8021Q);
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break;
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case ETHERTYPE_QINQ:
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printf(proto_8021ad);
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break;
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default:
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printf("0x%04x", vreq.vlr_proto);
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}
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if (ioctl_ctx_ifr(ctx, SIOCGVLANPCP, &ifr) != -1)
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printf(" vlanpcp: %u", ifr.ifr_vlan_pcp);
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printf(" parent interface: %s", vreq.vlr_parent[0] == '\0' ?
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"<none>" : vreq.vlr_parent);
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printf("\n");
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}
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static int
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vlan_match_ethervid(const char *name)
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{
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return (strchr(name, '.') != NULL);
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}
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static void
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vlan_parse_ethervid(const char *name)
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{
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char ifname[IFNAMSIZ];
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char *cp;
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unsigned int vid;
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strlcpy(ifname, name, IFNAMSIZ);
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if ((cp = strrchr(ifname, '.')) == NULL)
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return;
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/*
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* Derive params from interface name: "parent.vid".
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*/
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*cp++ = '\0';
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if ((*cp < '1') || (*cp > '9'))
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errx(1, "invalid vlan tag");
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vid = *cp++ - '0';
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while ((*cp >= '0') && (*cp <= '9')) {
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vid = (vid * 10) + (*cp++ - '0');
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if (vid >= 0xFFF)
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errx(1, "invalid vlan tag");
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}
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if (*cp != '\0')
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errx(1, "invalid vlan tag");
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/*
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* allow "devX.Y vlandev devX vlan Y" syntax
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*/
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if (params.vlr_tag == NOTAG || params.vlr_tag == vid)
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params.vlr_tag = vid;
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else
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errx(1, "ambiguous vlan specification");
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/* Restrict overriding interface name */
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if (params.vlr_parent[0] == '\0' || !strcmp(params.vlr_parent, ifname))
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strlcpy(params.vlr_parent, ifname, IFNAMSIZ);
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else
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errx(1, "ambiguous vlan specification");
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}
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static void
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vlan_create(if_ctx *ctx, struct ifreq *ifr)
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{
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vlan_parse_ethervid(ifr->ifr_name);
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if (params.vlr_tag != NOTAG || params.vlr_parent[0] != '\0') {
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/*
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* One or both parameters were specified, make sure both.
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*/
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if (params.vlr_tag == NOTAG)
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errx(1, "must specify a tag for vlan create");
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if (params.vlr_parent[0] == '\0')
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errx(1, "must specify a parent device for vlan create");
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ifr->ifr_data = (caddr_t) ¶ms;
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}
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ifcreate_ioctl(ctx, ifr);
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}
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static void
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vlan_cb(if_ctx *ctx __unused, void *arg __unused)
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{
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if ((params.vlr_tag != NOTAG) ^ (params.vlr_parent[0] != '\0'))
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errx(1, "both vlan and vlandev must be specified");
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}
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static void
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vlan_set(int s, struct ifreq *ifr)
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{
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if (params.vlr_tag != NOTAG && params.vlr_parent[0] != '\0') {
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ifr->ifr_data = (caddr_t) ¶ms;
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if (ioctl(s, SIOCSETVLAN, (caddr_t)ifr) == -1)
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err(1, "SIOCSETVLAN");
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}
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}
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static void
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setvlantag(if_ctx *ctx, const char *val, int dummy __unused)
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{
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struct vlanreq vreq = {};
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struct ifreq ifr = { .ifr_data = (caddr_t)&vreq };
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u_long ul;
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char *endp;
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ul = strtoul(val, &endp, 0);
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if (*endp != '\0')
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errx(1, "invalid value for vlan");
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params.vlr_tag = ul;
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/* check if the value can be represented in vlr_tag */
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if (params.vlr_tag != ul)
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errx(1, "value for vlan out of range");
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if (ioctl_ctx_ifr(ctx, SIOCGETVLAN, &ifr) != -1) {
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vreq.vlr_tag = params.vlr_tag;
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memcpy(¶ms, &vreq, sizeof(params));
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vlan_set(ctx->io_s, &ifr);
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}
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}
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static void
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setvlandev(if_ctx *ctx, const char *val, int dummy __unused)
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{
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struct vlanreq vreq = {};
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struct ifreq ifr = { .ifr_data = (caddr_t)&vreq };
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strlcpy(params.vlr_parent, val, sizeof(params.vlr_parent));
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if (ioctl_ctx_ifr(ctx, SIOCGETVLAN, &ifr) != -1)
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vlan_set(ctx->io_s, &ifr);
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}
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static void
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setvlanproto(if_ctx *ctx, const char *val, int dummy __unused)
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{
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struct vlanreq vreq = {};
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struct ifreq ifr = { .ifr_data = (caddr_t)&vreq };
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if (strncasecmp(proto_8021Q, val,
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strlen(proto_8021Q)) == 0) {
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params.vlr_proto = ETHERTYPE_VLAN;
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} else if ((strncasecmp(proto_8021ad, val, strlen(proto_8021ad)) == 0)
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|| (strncasecmp(proto_qinq, val, strlen(proto_qinq)) == 0)) {
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params.vlr_proto = ETHERTYPE_QINQ;
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} else
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errx(1, "invalid value for vlanproto");
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if (ioctl_ctx_ifr(ctx, SIOCGETVLAN, &ifr) != -1) {
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vreq.vlr_proto = params.vlr_proto;
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memcpy(¶ms, &vreq, sizeof(params));
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vlan_set(ctx->io_s, &ifr);
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}
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}
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static void
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setvlanpcp(if_ctx *ctx, const char *val, int dummy __unused)
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{
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u_long ul;
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char *endp;
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struct ifreq ifr = {};
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ul = strtoul(val, &endp, 0);
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if (*endp != '\0')
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errx(1, "invalid value for vlanpcp");
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if (ul > 7)
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errx(1, "value for vlanpcp out of range");
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ifr.ifr_vlan_pcp = ul;
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if (ioctl_ctx_ifr(ctx, SIOCSVLANPCP, &ifr) == -1)
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err(1, "SIOCSVLANPCP");
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}
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static void
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unsetvlandev(if_ctx *ctx, const char *val __unused, int dummy __unused)
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{
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struct vlanreq vreq = {};
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struct ifreq ifr = { .ifr_data = (caddr_t)&vreq };
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if (ioctl_ctx_ifr(ctx, SIOCGETVLAN, &ifr) == -1)
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err(1, "SIOCGETVLAN");
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bzero((char *)&vreq.vlr_parent, sizeof(vreq.vlr_parent));
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vreq.vlr_tag = 0;
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if (ioctl_ctx(ctx, SIOCSETVLAN, (caddr_t)&ifr) == -1)
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err(1, "SIOCSETVLAN");
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}
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static struct cmd vlan_cmds[] = {
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DEF_CLONE_CMD_ARG("vlan", setvlantag),
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DEF_CLONE_CMD_ARG("vlandev", setvlandev),
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DEF_CLONE_CMD_ARG("vlanproto", setvlanproto),
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DEF_CMD_ARG("vlanpcp", setvlanpcp),
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/* NB: non-clone cmds */
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DEF_CMD_ARG("vlan", setvlantag),
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DEF_CMD_ARG("vlandev", setvlandev),
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DEF_CMD_ARG("vlanproto", setvlanproto),
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/* XXX For compatibility. Should become DEF_CMD() some day. */
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DEF_CMD_OPTARG("-vlandev", unsetvlandev),
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DEF_CMD("vlanmtu", IFCAP_VLAN_MTU, setifcap),
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DEF_CMD("-vlanmtu", -IFCAP_VLAN_MTU, setifcap),
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DEF_CMD("vlanhwtag", IFCAP_VLAN_HWTAGGING, setifcap),
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DEF_CMD("-vlanhwtag", -IFCAP_VLAN_HWTAGGING, setifcap),
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DEF_CMD("vlanhwfilter", IFCAP_VLAN_HWFILTER, setifcap),
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DEF_CMD("-vlanhwfilter", -IFCAP_VLAN_HWFILTER, setifcap),
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DEF_CMD("-vlanhwtso", -IFCAP_VLAN_HWTSO, setifcap),
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DEF_CMD("vlanhwtso", IFCAP_VLAN_HWTSO, setifcap),
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DEF_CMD("vlanhwcsum", IFCAP_VLAN_HWCSUM, setifcap),
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DEF_CMD("-vlanhwcsum", -IFCAP_VLAN_HWCSUM, setifcap),
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};
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static struct afswtch af_vlan = {
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.af_name = "af_vlan",
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.af_af = AF_UNSPEC,
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.af_other_status = vlan_status,
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};
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static __constructor void
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vlan_ctor(void)
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{
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size_t i;
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for (i = 0; i < nitems(vlan_cmds); i++)
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cmd_register(&vlan_cmds[i]);
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af_register(&af_vlan);
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callback_register(vlan_cb, NULL);
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clone_setdefcallback_prefix("vlan", vlan_create);
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clone_setdefcallback_filter(vlan_match_ethervid, vlan_create);
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}
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