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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* bridged - bridging control daemon. This module provides DLPI-specific
* functions for interface to libdlpi.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <syslog.h>
#include <stropts.h>
#include <stp_in.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <sys/ethernet.h>
#include <sys/pfmod.h>
#include "global.h"
static const uchar_t bridge_group_address[] = BRIDGE_GROUP_ADDRESS;
static const ushort_t bpdu_filter[] = {
ENF_PUSHWORD | 0, /* check for 1:80:c2:0:0:0 dest. */
ENF_PUSHLIT | ENF_CAND,
#ifdef _BIG_ENDIAN
0x0180,
#else
0x8001,
#endif
ENF_PUSHWORD | 1,
ENF_PUSHLIT | ENF_CAND,
#ifdef _BIG_ENDIAN
0xC200,
#else
0x00C2,
#endif
ENF_PUSHWORD | 2,
ENF_PUSHZERO | ENF_CAND,
ENF_PUSHWORD | 7, /* check for SSAP/DSAP 42 42 */
ENF_PUSHLIT | ENF_CAND,
0x4242,
};
/*
* Because we're called by dlpi_recv(), we're called with the engine lock held.
*/
/*ARGSUSED*/
static void
dlpi_notify(dlpi_handle_t dlpi, dlpi_notifyinfo_t *info, void *arg)
{
struct portdata *port = arg;
int rc;
switch (info->dni_note) {
case DL_NOTE_SPEED:
/* libdlpi gives us Kbps, and we want Mbps */
if (port->speed == info->dni_speed / 1000)
break;
port->speed = info->dni_speed / 1000;
if ((rc = STP_IN_changed_port_speed(port->port_index,
port->speed)) != 0)
syslog(LOG_ERR, "STP can't change port speed on %s: %s",
port->name, STP_IN_get_error_explanation(rc));
break;
case DL_NOTE_PHYS_ADDR:
if (memcmp(info->dni_physaddr, port->mac_addr, ETHERADDRL) != 0)
rstp_change_mac(port, info->dni_physaddr);
break;
case DL_NOTE_LINK_DOWN:
if (!port->phys_status)
break;
port->phys_status = B_FALSE;
if (!port->admin_status || protect != DLADM_BRIDGE_PROT_STP ||
port->sdu_failed)
break;
if ((rc = STP_IN_enable_port(port->port_index, False)) != 0)
syslog(LOG_ERR, "STP can't disable port %s: %s",
port->name, STP_IN_get_error_explanation(rc));
break;
case DL_NOTE_LINK_UP:
if (port->phys_status)
break;
port->phys_status = B_TRUE;
if (!port->admin_status || protect != DLADM_BRIDGE_PROT_STP ||
port->sdu_failed) {
port->bpdu_protect = B_FALSE;
break;
}
/*
* If we're not running STP, and the link state has just come
* up, then clear out any protection shutdown state, and allow
* us to forward again.
*/
if (port->admin_non_stp && port->bpdu_protect) {
port->bpdu_protect = B_FALSE;
enable_forwarding(port);
}
if ((rc = STP_IN_enable_port(port->port_index, True)) != 0)
syslog(LOG_ERR, "STP can't enable port %s: %s",
port->name, STP_IN_get_error_explanation(rc));
break;
}
}
boolean_t
port_dlpi_open(const char *portname, struct portdata *port,
datalink_class_t class)
{
uchar_t addrbuf[DLPI_PHYSADDR_MAX];
size_t alen = DLPI_PHYSADDR_MAX;
int rc;
char addrstr[ETHERADDRL * 3];
/*
* We use DLPI 'raw' mode so that we get access to the received
* Ethernet 802 length field. libdlpi otherwise eats this value. Note
* that 'raw' mode support is required in order to use snoop, so it's
* expected to be common, even if it's not documented.
*/
rc = dlpi_open(portname, &port->dlpi, DLPI_RAW);
if (rc != DLPI_SUCCESS) {
syslog(LOG_ERR, "can't open %s: %s", portname,
dlpi_strerror(rc));
return (B_FALSE);
}
port->phys_status = B_TRUE;
port->sdu_failed = B_FALSE;
port->bpdu_protect = B_FALSE;
/*
* Now that the driver is open, we can get at least the initial value
* of the interface speed. We need to do this before establishing the
* notify callback, so that it can update us later.
*/
get_dladm_speed(port);
/*
* Save off the libdlpi port name, as it's dynamically allocated, and
* the name we're passed is not.
*/
port->name = dlpi_linkname(port->dlpi);
/*
* We can't bind SAP 0 or enable multicast on an etherstub. It's ok,
* though, because there's no real hardware involved.
*/
if (class != DATALINK_CLASS_ETHERSTUB) {
if ((rc = dlpi_bind(port->dlpi, 0, NULL)) != DLPI_SUCCESS) {
syslog(LOG_ERR, "can't bind %s: %s", portname,
dlpi_strerror(rc));
return (B_FALSE);
}
if ((rc = dlpi_enabmulti(port->dlpi, bridge_group_address,
sizeof (bridge_group_address))) != DLPI_SUCCESS) {
syslog(LOG_ERR, "can't enable multicast on %s: %s",
portname, dlpi_strerror(rc));
return (B_FALSE);
}
}
if ((rc = dlpi_enabnotify(port->dlpi,
DL_NOTE_PHYS_ADDR | DL_NOTE_LINK_DOWN | DL_NOTE_LINK_UP |
DL_NOTE_SPEED, dlpi_notify, port, &port->notifyid)) !=
DLPI_SUCCESS) {
syslog(LOG_WARNING, "no DLPI notification on %s: %s", portname,
dlpi_strerror(rc));
}
rc = dlpi_get_physaddr(port->dlpi, DL_CURR_PHYS_ADDR, addrbuf, &alen);
if (rc != DLPI_SUCCESS) {
syslog(LOG_ERR, "unable to get MAC address on %s: %s",
port->name, dlpi_strerror(rc));
return (B_FALSE);
}
if (alen != ETHERADDRL) {
syslog(LOG_ERR, "bad MAC address length %d on %s",
alen, port->name);
return (B_FALSE);
}
(void) memcpy(port->mac_addr, addrbuf, ETHERADDRL);
if (class != DATALINK_CLASS_ETHERSTUB) {
int fd = dlpi_fd(port->dlpi);
int lowflag = 1;
if (strioctl(fd, DLIOCLOWLINK, &lowflag, sizeof (lowflag)) != 0)
syslog(LOG_WARNING, "low-link notify failed on %s: %m",
portname);
if (ioctl(fd, I_PUSH, "pfmod") == 0) {
struct packetfilt pf;
pf.Pf_Priority = 0;
pf.Pf_FilterLen = sizeof (bpdu_filter) /
sizeof (*bpdu_filter);
(void) memcpy(pf.Pf_Filter, bpdu_filter,
sizeof (bpdu_filter));
if (strioctl(fd, PFIOCSETF, &pf, sizeof (pf)) == -1)
syslog(LOG_WARNING,
"pfil ioctl failed on %s: %m", portname);
} else {
syslog(LOG_WARNING, "pfil push failed on %s: %m",
portname);
}
}
if (debugging) {
(void) _link_ntoa(port->mac_addr, addrstr, ETHERADDRL,
IFT_OTHER);
syslog(LOG_DEBUG, "got MAC address %s on %s", addrstr,
port->name);
}
return (B_TRUE);
}
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