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hostap/src/drivers/driver_roboswitch.c
Jouke Witteveen 077ed46d2b General revision of RoboSwitch driver 
Attached is a patch for the RoboSwitch driver in trunk. It is a
general revision of the source code.

Changes:
- Improved IEEE 802.1X conformance ([1])
- Better conformity to Broadcom specifications
- Fixed compatibility with different chipset revisions

It is worth noting that performance may drop a little using the new
driver. This can be overcome by using "multicast_only=1" as a
parameter. In that case only packets to the PAE group address are
regarded, as the previous revision of the driver did. A more detailed
description of the parameter and it's consequences is available at [2]
(summary: use "multicast_only=1" whenever possible).

[1] http://lists.shmoo.com/pipermail/hostap/2009-February/019398.html
[2] http://forum.openwrt.org/viewtopic.php?id=19873
2009-04-26 21:25:48 +03:00

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/*
* WPA Supplicant - roboswitch driver interface
* Copyright (c) 2008-2009 Jouke Witteveen
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include <sys/ioctl.h>
#include <linux/if.h>
#include <linux/sockios.h>
#include <linux/if_ether.h>
#include <linux/mii.h>
#include "common.h"
#include "driver.h"
#include "l2_packet/l2_packet.h"
#ifndef ETH_P_EAPOL
#define ETH_P_EAPOL 0x888e
#endif
#define ROBO_PHY_ADDR 0x1e /* RoboSwitch PHY address */
/* MII access registers */
#define ROBO_MII_PAGE 0x10 /* MII page register */
#define ROBO_MII_ADDR 0x11 /* MII address register */
#define ROBO_MII_DATA_OFFSET 0x18 /* Start of MII data registers */
#define ROBO_MII_PAGE_ENABLE 0x01 /* MII page op code */
#define ROBO_MII_ADDR_WRITE 0x01 /* MII address write op code */
#define ROBO_MII_ADDR_READ 0x02 /* MII address read op code */
#define ROBO_MII_DATA_MAX 4 /* Consecutive MII data registers */
#define ROBO_MII_RETRY_MAX 10 /* Read attempts before giving up */
/* Page numbers */
#define ROBO_ARLCTRL_PAGE 0x04 /* ARL control page */
#define ROBO_VLAN_PAGE 0x34 /* VLAN page */
/* ARL control page registers */
#define ROBO_ARLCTRL_CONF 0x00 /* ARL configuration register */
#define ROBO_ARLCTRL_ADDR_1 0x10 /* Multiport address 1 */
#define ROBO_ARLCTRL_VEC_1 0x16 /* Multiport vector 1 */
#define ROBO_ARLCTRL_ADDR_2 0x20 /* Multiport address 2 */
#define ROBO_ARLCTRL_VEC_2 0x26 /* Multiport vector 2 */
/* VLAN page registers */
#define ROBO_VLAN_ACCESS 0x08 /* VLAN table access register */
#define ROBO_VLAN_ACCESS_5350 0x06 /* VLAN table access register (5350) */
#define ROBO_VLAN_READ 0x0c /* VLAN read register */
#define ROBO_VLAN_MAX 0xff /* Maximum number of VLANs */
static const u8 pae_group_addr[ETH_ALEN] =
{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
struct wpa_driver_roboswitch_data {
void *ctx;
struct l2_packet_data *l2;
char ifname[IFNAMSIZ + 1];
u8 own_addr[ETH_ALEN];
struct ifreq ifr;
int fd, is_5350;
u16 ports;
};
/* Copied from the kernel-only part of mii.h. */
static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
{
return (struct mii_ioctl_data *) &rq->ifr_ifru;
}
/*
* RoboSwitch uses 16-bit Big Endian addresses.
* The ordering of the words is reversed in the MII registers.
*/
static void wpa_driver_roboswitch_addr_be16(const u8 addr[ETH_ALEN], u16 *be)
{
int i;
for (i = 0; i < ETH_ALEN; i += 2)
be[(ETH_ALEN - i) / 2 - 1] = WPA_GET_BE16(addr + i);
}
static u16 wpa_driver_roboswitch_mdio_read(
struct wpa_driver_roboswitch_data *drv, u8 reg)
{
struct mii_ioctl_data *mii = if_mii(&drv->ifr);
mii->phy_id = ROBO_PHY_ADDR;
mii->reg_num = reg;
if (ioctl(drv->fd, SIOCGMIIREG, &drv->ifr) < 0) {
perror("ioctl[SIOCGMIIREG]");
return 0x00;
}
return mii->val_out;
}
static void wpa_driver_roboswitch_mdio_write(
struct wpa_driver_roboswitch_data *drv, u8 reg, u16 val)
{
struct mii_ioctl_data *mii = if_mii(&drv->ifr);
mii->phy_id = ROBO_PHY_ADDR;
mii->reg_num = reg;
mii->val_in = val;
if (ioctl(drv->fd, SIOCSMIIREG, &drv->ifr) < 0) {
perror("ioctl[SIOCSMIIREG");
}
}
static int wpa_driver_roboswitch_reg(struct wpa_driver_roboswitch_data *drv,
u8 page, u8 reg, u8 op)
{
int i;
/* set page number */
wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_PAGE,
(page << 8) | ROBO_MII_PAGE_ENABLE);
/* set register address */
wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_ADDR, (reg << 8) | op);
/* check if operation completed */
for (i = 0; i < ROBO_MII_RETRY_MAX; ++i) {
if ((wpa_driver_roboswitch_mdio_read(drv, ROBO_MII_ADDR) & 3)
== 0)
return 0;
}
/* timeout */
return -1;
}
static int wpa_driver_roboswitch_read(struct wpa_driver_roboswitch_data *drv,
u8 page, u8 reg, u16 *val, int len)
{
int i;
if (len > ROBO_MII_DATA_MAX ||
wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_READ) < 0)
return -1;
for (i = 0; i < len; ++i) {
val[i] = wpa_driver_roboswitch_mdio_read(
drv, ROBO_MII_DATA_OFFSET + i);
}
return 0;
}
static int wpa_driver_roboswitch_write(struct wpa_driver_roboswitch_data *drv,
u8 page, u8 reg, u16 *val, int len)
{
int i;
if (len > ROBO_MII_DATA_MAX) return -1;
for (i = 0; i < len; ++i) {
wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_DATA_OFFSET + i,
val[i]);
}
return wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_WRITE);
}
static void wpa_driver_roboswitch_receive(void *priv, const u8 *src_addr,
const u8 *buf, size_t len)
{
struct wpa_driver_roboswitch_data *drv = priv;
if (len > 14 && WPA_GET_BE16(buf + 12) == ETH_P_EAPOL &&
os_memcmp(buf, drv->own_addr, ETH_ALEN) == 0) {
wpa_supplicant_rx_eapol(drv->ctx, src_addr, buf + 14,
len - 14);
}
}
static int wpa_driver_roboswitch_get_ssid(void *priv, u8 *ssid)
{
ssid[0] = 0;
return 0;
}
static int wpa_driver_roboswitch_get_bssid(void *priv, u8 *bssid)
{
/* Report PAE group address as the "BSSID" for wired connection. */
os_memcpy(bssid, pae_group_addr, ETH_ALEN);
return 0;
}
static int wpa_driver_roboswitch_get_capa(void *priv,
struct wpa_driver_capa *capa)
{
os_memset(capa, 0, sizeof(*capa));
capa->flags = WPA_DRIVER_FLAGS_WIRED;
return 0;
}
static int wpa_driver_roboswitch_set_param(void *priv, const char *param)
{
struct wpa_driver_roboswitch_data *drv = priv;
char *sep;
if (param == NULL || os_strstr(param, "multicast_only=1") == NULL) {
sep = drv->ifname + os_strlen(drv->ifname);
*sep = '.';
drv->l2 = l2_packet_init(drv->ifname, NULL, ETH_P_ALL,
wpa_driver_roboswitch_receive, drv,
1);
if (drv->l2 == NULL) {
wpa_printf(MSG_INFO, "%s: Unable to listen on %s",
__func__, drv->ifname);
return -1;
}
*sep = '\0';
l2_packet_get_own_addr(drv->l2, drv->own_addr);
} else {
wpa_printf(MSG_DEBUG, "%s: Ignoring unicast frames", __func__);
drv->l2 = NULL;
}
return 0;
}
static const char * wpa_driver_roboswitch_get_ifname(void *priv)
{
struct wpa_driver_roboswitch_data *drv = priv;
return drv->ifname;
}
static int wpa_driver_roboswitch_join(struct wpa_driver_roboswitch_data *drv,
u16 ports, const u8 *addr)
{
u16 read1[3], read2[3], addr_be16[3];
wpa_driver_roboswitch_addr_be16(addr, addr_be16);
if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_CONF, read1, 1) < 0)
return -1;
if (!(read1[0] & (1 << 4))) {
/* multiport addresses are not yet enabled */
read1[0] |= 1 << 4;
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_1, addr_be16, 3);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_1, &ports, 1);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2, addr_be16, 3);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2, &ports, 1);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_CONF, read1, 1);
} else {
/* if both multiport addresses are the same we can add */
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_1, read1, 3);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2, read2, 3);
if (os_memcmp(read1, read2, 6) != 0)
return -1;
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_1, read1, 1);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2, read2, 1);
if (read1[0] != read2[0])
return -1;
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_1, addr_be16, 3);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_1, &ports, 1);
}
return 0;
}
static int wpa_driver_roboswitch_leave(struct wpa_driver_roboswitch_data *drv,
u16 ports, const u8 *addr)
{
u16 _read, addr_be16[3], addr_read[3], ports_read;
wpa_driver_roboswitch_addr_be16(addr, addr_be16);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_CONF,
&_read, 1);
/* If ARL control is disabled, there is nothing to leave. */
if (!(_read & (1 << 4))) return -1;
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_1, addr_read, 3);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_VEC_1,
&ports_read, 1);
/* check if we occupy multiport address 1 */
if (os_memcmp(addr_read, addr_be16, 6) == 0 && ports_read == ports) {
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2, addr_read, 3);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2, &ports_read, 1);
/* and multiport address 2 */
if (os_memcmp(addr_read, addr_be16, 6) == 0 &&
ports_read == ports) {
_read &= ~(1 << 4);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_CONF, &_read,
1);
} else {
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_1,
addr_read, 3);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_1,
&ports_read, 1);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2,
addr_read, 3);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2,
&ports_read, 1);
}
} else {
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2, addr_read, 3);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2, &ports_read, 1);
/* or multiport address 2 */
if (os_memcmp(addr_read, addr_be16, 6) == 0 &&
ports_read == ports) {
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_1,
addr_read, 3);
wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_1,
&ports_read, 1);
} else return -1;
}
return 0;
}
static void * wpa_driver_roboswitch_init(void *ctx, const char *ifname)
{
struct wpa_driver_roboswitch_data *drv;
char *sep;
u16 vlan = 0, _read[2];
drv = os_zalloc(sizeof(*drv));
if (drv == NULL) return NULL;
drv->ctx = ctx;
drv->own_addr[0] = '\0';
/* copy ifname and take a pointer to the second to last character */
sep = drv->ifname +
os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)) - 2;
/* find the '.' seperating <interface> and <vlan> */
while (sep > drv->ifname && *sep != '.') sep--;
if (sep <= drv->ifname) {
wpa_printf(MSG_INFO, "%s: No <interface>.<vlan> pair in "
"interface name %s", __func__, drv->ifname);
os_free(drv);
return NULL;
}
*sep = '\0';
while (*++sep) {
if (*sep < '0' || *sep > '9') {
wpa_printf(MSG_INFO, "%s: Invalid vlan specification "
"in interface name %s", __func__, ifname);
os_free(drv);
return NULL;
}
vlan *= 10;
vlan += *sep - '0';
if (vlan > ROBO_VLAN_MAX) {
wpa_printf(MSG_INFO, "%s: VLAN out of range in "
"interface name %s", __func__, ifname);
os_free(drv);
return NULL;
}
}
drv->fd = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->fd < 0) {
wpa_printf(MSG_INFO, "%s: Unable to create socket", __func__);
os_free(drv);
return NULL;
}
os_memset(&drv->ifr, 0, sizeof(drv->ifr));
os_strlcpy(drv->ifr.ifr_name, drv->ifname, IFNAMSIZ);
if (ioctl(drv->fd, SIOCGMIIPHY, &drv->ifr) < 0) {
perror("ioctl[SIOCGMIIPHY]");
os_free(drv);
return NULL;
}
if (if_mii(&drv->ifr)->phy_id != ROBO_PHY_ADDR) {
wpa_printf(MSG_INFO, "%s: Invalid phy address (not a "
"RoboSwitch?)", __func__);
os_free(drv);
return NULL;
}
/* set and read back to see if the register can be used */
_read[0] = ROBO_VLAN_MAX;
wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350,
_read, 1);
wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350,
_read + 1, 1);
drv->is_5350 = _read[0] == _read[1];
/* set the read bit */
vlan |= 1 << 13;
wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE,
drv->is_5350 ? ROBO_VLAN_ACCESS_5350
: ROBO_VLAN_ACCESS,
&vlan, 1);
wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_READ, _read,
drv->is_5350 ? 2 : 1);
if (!(drv->is_5350 ? _read[1] & (1 << 4) : _read[0] & (1 << 14))) {
wpa_printf(MSG_INFO, "%s: Could not get port information for "
"VLAN %d", __func__, vlan & ~(1 << 13));
os_free(drv);
return NULL;
}
drv->ports = _read[0] & 0x001F;
/* add the MII port */
drv->ports |= 1 << 8;
if (wpa_driver_roboswitch_join(drv, drv->ports, pae_group_addr) < 0) {
wpa_printf(MSG_INFO, "%s: Unable to join PAE group", __func__);
os_free(drv);
return NULL;
} else {
wpa_printf(MSG_DEBUG, "%s: Added PAE group address to "
"RoboSwitch ARL", __func__);
}
return drv;
}
static void wpa_driver_roboswitch_deinit(void *priv)
{
struct wpa_driver_roboswitch_data *drv = priv;
if (drv->l2) {
l2_packet_deinit(drv->l2);
drv->l2 = NULL;
}
if (wpa_driver_roboswitch_leave(drv, drv->ports, pae_group_addr) < 0) {
wpa_printf(MSG_DEBUG, "%s: Unable to leave PAE group",
__func__);
}
close(drv->fd);
os_free(drv);
}
const struct wpa_driver_ops wpa_driver_roboswitch_ops = {
.name = "roboswitch",
.desc = "wpa_supplicant roboswitch driver",
.get_ssid = wpa_driver_roboswitch_get_ssid,
.get_bssid = wpa_driver_roboswitch_get_bssid,
.get_capa = wpa_driver_roboswitch_get_capa,
.init = wpa_driver_roboswitch_init,
.deinit = wpa_driver_roboswitch_deinit,
.set_param = wpa_driver_roboswitch_set_param,
.get_ifname = wpa_driver_roboswitch_get_ifname,
};
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