b82b8055ad
The setvlantag() and setvlanproto() functions are used in two scenarios: when we create a new vlan interface and when we update an existing interface. These are distinguished by the getvlan() at the end of the functions. If this fails we assume that is because the interface doesn't exist (so we're creating a new one). We only update the 'params' struct, and expect the settings to be applied when we vlan_create(). However, if we're updating an existing interface we do not retrieve the current settings, and can end up invalidating settings. Fix this by using the settings we retrieved while checking which scenario we're in. Note that we do not address this for setvlandev(), because if_vlan does not allow the vlan parent device to be changed without disassociating it first (with ifconfig vlanX -vlandev). Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D35848
320 lines
8.4 KiB
C
320 lines
8.4 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 int
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getvlan(int s, struct ifreq *ifr, struct vlanreq *vreq)
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{
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bzero((char *)vreq, sizeof(*vreq));
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ifr->ifr_data = (caddr_t)vreq;
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return ioctl(s, SIOCGETVLAN, (caddr_t)ifr);
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}
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static void
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vlan_status(int s)
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{
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struct vlanreq vreq;
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if (getvlan(s, &ifr, &vreq) == -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(s, SIOCGVLANPCP, (caddr_t)&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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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 ((*cp != '\0') || (vid & ~0xFFF))
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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(int s, 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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ioctl_ifcreate(s, ifr);
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}
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static void
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vlan_cb(int s, void *arg)
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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
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DECL_CMD_FUNC(setvlantag, val, d)
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{
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struct vlanreq 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 (getvlan(s, &ifr, &vreq) != -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(s, &ifr);
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}
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}
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static
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DECL_CMD_FUNC(setvlandev, val, d)
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{
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struct vlanreq vreq;
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strlcpy(params.vlr_parent, val, sizeof(params.vlr_parent));
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if (getvlan(s, &ifr, &vreq) != -1)
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vlan_set(s, &ifr);
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}
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static
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DECL_CMD_FUNC(setvlanproto, val, d)
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{
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struct vlanreq 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 (getvlan(s, &ifr, &vreq) != -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(s, &ifr);
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}
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}
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static
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DECL_CMD_FUNC(setvlanpcp, val, d)
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{
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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 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(s, SIOCSVLANPCP, (caddr_t)&ifr) == -1)
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err(1, "SIOCSVLANPCP");
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}
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static
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DECL_CMD_FUNC(unsetvlandev, val, d)
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{
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struct vlanreq vreq;
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bzero((char *)&vreq, sizeof(struct vlanreq));
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ifr.ifr_data = (caddr_t)&vreq;
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if (ioctl(s, SIOCGETVLAN, (caddr_t)&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(s, 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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