Add RoboSwitch driver interface for wpa_supplicant
Find attached the patch that creates a new driver: roboswitch. This driver adds support for wired authentication with a Broadcom RoboSwitch chipset. For example it is now possible to do wired authentication with a Linksys WRT54G router running OpenWRT. LIMITATIONS - At the moment the driver does not support the BCM5365 series (though adding it requires just some register tweaks). - The driver is also limited to Linux (this is a far more technical restriction). - In order to compile against a 2.4 series you need to edit include/linux/mii.h and change all references to "u16" in "__u16". I have submitted a patch upstream that will fix this in a future version of the 2.4 kernel. [These modifications (and more) are now included in the kernel source and can be found in versions 2.4.37-rc2 and up.] USAGE - Usage is similar to the wired driver. Choose the interfacename of the vlan that contains your desired authentication port on the router. This name must be formatted as <interface>.<vlan>, which is the default on all systems I know.master
Jouke Witteveen
16 years ago
committed by
Jouni Malinen
parent
cd35db9fef
commit
e519314ee9
@ -0,0 +1,409 @@
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/*
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* WPA Supplicant - roboswitch driver interface
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* Copyright (c) 2008 Jouke Witteveen
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include <sys/ioctl.h>
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#include <linux/if.h>
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#include <linux/sockios.h>
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#include <linux/mii.h>
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#include "common.h"
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#include "driver.h"
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#define ROBO_PHY_ADDR 0x1E /* RoboSwitch PHY address */
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/* MII access registers */
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#define ROBO_MII_PAGE 0x10 /* MII page register */
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#define ROBO_MII_ADDR 0x11 /* MII address register */
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#define ROBO_MII_DATA_OFFSET 0x18 /* Start of MII data registers */
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#define ROBO_MII_PAGE_ENABLE 0x01 /* MII page op code */
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#define ROBO_MII_ADDR_WRITE 0x01 /* MII address write op code */
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#define ROBO_MII_ADDR_READ 0x02 /* MII address read op code */
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#define ROBO_MII_DATA_MAX 4 /* Consecutive MII data registers */
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#define ROBO_MII_RETRY_MAX 10 /* Read attempts before giving up */
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/* Page numbers */
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#define ROBO_ARLCTRL_PAGE 0x04 /* ARL control page */
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#define ROBO_VLAN_PAGE 0x34 /* VLAN page */
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/* ARL control page registers */
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#define ROBO_ARLCTRL_CONF 0x00 /* ARL configuration register */
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#define ROBO_ARLCTRL_ADDR_1 0x10 /* Multiport address 1 */
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#define ROBO_ARLCTRL_VEC_1 0x16 /* Multiport vector 1 */
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#define ROBO_ARLCTRL_ADDR_2 0x20 /* Multiport address 2 */
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#define ROBO_ARLCTRL_VEC_2 0x26 /* Multiport vector 2 */
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/* VLAN page registers */
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#define ROBO_VLAN_ACCESS 0x06 /* VLAN table Access register */
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#define ROBO_VLAN_READ 0x0C /* VLAN read register */
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static const u8 pae_group_addr[ETH_ALEN] =
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{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
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struct wpa_driver_roboswitch_data {
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void *ctx;
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char ifname[IFNAMSIZ + 1];
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struct ifreq ifr;
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int fd;
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u16 ports;
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};
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/* Copied from the kernel-only part of mii.h. */
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static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
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{
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return (struct mii_ioctl_data *) &rq->ifr_ifru;
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}
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static u16 wpa_driver_roboswitch_mdio_read(
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struct wpa_driver_roboswitch_data *drv, u8 reg)
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{
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struct mii_ioctl_data *mii = if_mii(&drv->ifr);
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mii->phy_id = ROBO_PHY_ADDR;
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mii->reg_num = reg;
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if (ioctl(drv->fd, SIOCGMIIREG, &drv->ifr) < 0) {
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perror("ioctl[SIOCGMIIREG]");
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return 0x00;
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}
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return mii->val_out;
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}
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static void wpa_driver_roboswitch_mdio_write(
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struct wpa_driver_roboswitch_data *drv, u8 reg, u16 val)
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{
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struct mii_ioctl_data *mii = if_mii(&drv->ifr);
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mii->phy_id = ROBO_PHY_ADDR;
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mii->reg_num = reg;
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mii->val_in = val;
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if (ioctl(drv->fd, SIOCSMIIREG, &drv->ifr) < 0) {
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perror("ioctl[SIOCSMIIREG");
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}
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}
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static int wpa_driver_roboswitch_reg(struct wpa_driver_roboswitch_data *drv,
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u8 page, u8 reg, u8 op)
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{
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int i;
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/* set page number */
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wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_PAGE,
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(page << 8) | ROBO_MII_PAGE_ENABLE);
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/* set register address */
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wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_ADDR, (reg << 8) | op);
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/* check if operation completed */
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for (i = 0; i < ROBO_MII_RETRY_MAX; ++i) {
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if ((wpa_driver_roboswitch_mdio_read(drv, ROBO_MII_ADDR) & 3) ==
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0) {
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return 0;
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}
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}
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/* timeout */
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return -1;
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}
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static int wpa_driver_roboswitch_read(struct wpa_driver_roboswitch_data *drv,
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u8 page, u8 reg, u16 *val, int len)
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{
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int i;
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if (len > ROBO_MII_DATA_MAX ||
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wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_READ) < 0) {
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return -1;
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}
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for (i = 0; i < len; ++i) {
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val[i] = wpa_driver_roboswitch_mdio_read(drv,
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ROBO_MII_DATA_OFFSET + i);
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}
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return 0;
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}
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static int wpa_driver_roboswitch_write(struct wpa_driver_roboswitch_data *drv,
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u8 page, u8 reg, u16 *val, int len)
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{
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int i;
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if (len > ROBO_MII_DATA_MAX) return -1;
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for (i = 0; i < len; ++i) {
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wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_DATA_OFFSET + i,
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val[i]);
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}
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return wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_WRITE);
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}
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static int wpa_driver_roboswitch_get_ssid(void *priv, u8 *ssid)
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{
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ssid[0] = 0;
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return 0;
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}
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static int wpa_driver_roboswitch_get_bssid(void *priv, u8 *bssid)
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{
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/* Report PAE group address as the "BSSID" for wired connection. */
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os_memcpy(bssid, pae_group_addr, ETH_ALEN);
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return 0;
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}
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static const char * wpa_driver_roboswitch_get_ifname(void *priv)
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{
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struct wpa_driver_roboswitch_data *drv = priv;
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return drv->ifname;
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}
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static int wpa_driver_roboswitch_join(struct wpa_driver_roboswitch_data *drv,
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const u8 *addr)
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{
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int i;
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u16 _read, zero = 0;
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/* For reasons of simplicity we assume ETH_ALEN is even. */
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u16 addr_word[ETH_ALEN/2];
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/* RoboSwitch uses 16-bit Big Endian addresses. */
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/* The ordering of the words is reversed in the MII registers. */
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for (i = 0; i < ETH_ALEN; i += 2) {
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addr_word[(ETH_ALEN - i) / 2 - 1] = WPA_GET_BE16(addr + i);
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}
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/* check if multiport addresses are not yet enabled */
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if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_CONF, &_read, 1) < 0) {
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return -1;
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}
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if (!(_read & (1 << 4))){
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_read |= 1 << 4;
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_ADDR_1, addr_word, 3);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_VEC_1, &drv->ports, 1);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_VEC_2, &zero, 1);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_CONF, &_read, 1);
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return 0;
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}
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/* check if multiport address 1 is free */
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_VEC_1,
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&_read, 1);
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if (_read == 0) {
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_ADDR_1, addr_word, 3);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_VEC_1, &drv->ports, 1);
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return 0;
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}
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/* check if multiport address 2 is free */
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_VEC_2,
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&_read, 1);
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if (_read == 0) {
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_ADDR_2, addr_word, 3);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_VEC_2, &drv->ports, 1);
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return 0;
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}
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/* out of free multiport addresses */
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return -1;
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}
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static int wpa_driver_roboswitch_leave(struct wpa_driver_roboswitch_data *drv,
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const u8 *addr)
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{
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int i;
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u8 mport[4] = { ROBO_ARLCTRL_VEC_1, ROBO_ARLCTRL_ADDR_1,
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ROBO_ARLCTRL_VEC_2, ROBO_ARLCTRL_ADDR_2 };
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u16 _read[3], zero = 0;
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/* same as at join */
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u16 addr_word[ETH_ALEN/2];
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for (i = 0; i < ETH_ALEN; i += 2) {
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addr_word[(ETH_ALEN - i) / 2 - 1] = WPA_GET_BE16(addr + i);
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}
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/* find our address/vector pair */
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for (i = 0; i < 4; i += 2) {
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, mport[i],
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_read, 1);
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if (_read[0] == drv->ports) {
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
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mport[i + 1], _read, 3);
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if (os_memcmp(read, addr_word, 6) == 0)
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break;
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}
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}
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/* check if we found our address/vector pair and deactivate it */
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if (i == 4) return -1;
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, mport[i], &zero, 1);
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/* leave the multiport registers in a sane state */
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_VEC_1,
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_read, 1);
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if (_read[0] == 0) {
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_VEC_2, _read, 1);
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if (_read[0] == 0) {
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_CONF, _read, 1);
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_read[0] &= ~(1 << 4);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_CONF, _read, 1);
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} else {
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_ADDR_2, _read,
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3);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_ADDR_1, _read,
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3);
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wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_VEC_2, _read, 1);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_VEC_1, _read,
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1);
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wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
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ROBO_ARLCTRL_VEC_2, &zero,
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1);
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}
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}
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return 0;
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}
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static void * wpa_driver_roboswitch_init(void *ctx, const char *ifname)
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{
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struct wpa_driver_roboswitch_data *drv;
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int len = -1, sep = -1;
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u16 vlan = 0, vlan_read[2];
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drv = os_zalloc(sizeof(*drv));
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if (drv == NULL) return NULL;
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drv->ctx = ctx;
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while (ifname[++len]) if (ifname[len] == '.') sep = len;
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if (sep < 0 || sep >= len - 1) {
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wpa_printf(MSG_INFO, "%s: No <interface>.<vlan> pair in "
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"interfacename %s", __func__, ifname);
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os_free(drv);
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return NULL;
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}
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if (sep > IFNAMSIZ) {
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wpa_printf(MSG_INFO, "%s: Interfacename %s is too long",
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__func__, ifname);
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os_free(drv);
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return NULL;
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}
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os_memcpy(drv->ifname, ifname, sep);
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drv->ifname[sep] = '\0';
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while (++sep < len) {
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if (ifname[sep] < '0' || ifname[sep] > '9') {
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wpa_printf(MSG_INFO, "%s: Invalid vlan specification "
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"in interfacename %s", __func__, ifname);
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os_free(drv);
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return NULL;
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}
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vlan *= 10;
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vlan += ifname[sep] - '0';
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if (vlan > 255) {
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wpa_printf(MSG_INFO, "%s: VLAN out of range in "
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"interfacename %s", __func__, ifname);
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os_free(drv);
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return NULL;
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}
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}
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drv->fd = socket(PF_INET, SOCK_DGRAM, 0);
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if (drv->fd < 0) {
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wpa_printf(MSG_INFO, "%s: Unable to create socket", __func__);
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os_free(drv);
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return NULL;
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}
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os_memset(&drv->ifr, 0, sizeof(drv->ifr));
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os_strlcpy(drv->ifr.ifr_name, drv->ifname, IFNAMSIZ);
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if (ioctl(drv->fd, SIOCGMIIPHY, &drv->ifr) < 0) {
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perror("ioctl[SIOCGMIIPHY]");
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os_free(drv);
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return NULL;
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}
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if (if_mii(&drv->ifr)->phy_id != ROBO_PHY_ADDR) {
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wpa_printf(MSG_INFO, "%s: Invalid phy address (not a "
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"RoboSwitch?)", __func__);
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os_free(drv);
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return NULL;
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}
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vlan |= 1 << 13;
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/* The BCM5365 uses a different register and is not accounted for. */
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wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS,
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&vlan, 1);
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wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_READ,
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vlan_read, 2);
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if (!(vlan_read[1] & (1 << 4))) {
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wpa_printf(MSG_INFO, "%s: Could not get port information for "
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"VLAN %d", __func__, vlan & ~(1 << 13));
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os_free(drv);
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return NULL;
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}
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drv->ports = vlan_read[0] & 0x001F;
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/* add the MII port */
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drv->ports |= 1 << 8;
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if (wpa_driver_roboswitch_join(drv, pae_group_addr) < 0) {
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wpa_printf(MSG_INFO, "%s: Unable to join PAE group", __func__);
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os_free(drv);
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return NULL;
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} else {
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wpa_printf(MSG_DEBUG, "%s: Added PAE group address to "
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"RoboSwitch ARL", __func__);
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}
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return drv;
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}
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static void wpa_driver_roboswitch_deinit(void *priv)
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{
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struct wpa_driver_roboswitch_data *drv = priv;
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if (wpa_driver_roboswitch_leave(drv, pae_group_addr) < 0) {
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wpa_printf(MSG_DEBUG, "%s: Unable to leave PAE group",
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__func__);
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}
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close(drv->fd);
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os_free(drv);
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}
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const struct wpa_driver_ops wpa_driver_roboswitch_ops = {
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.name = "roboswitch",
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.desc = "wpa_supplicant roboswitch driver",
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.get_ssid = wpa_driver_roboswitch_get_ssid,
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.get_bssid = wpa_driver_roboswitch_get_bssid,
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.init = wpa_driver_roboswitch_init,
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.deinit = wpa_driver_roboswitch_deinit,
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.get_ifname = wpa_driver_roboswitch_get_ifname,
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};
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