/* * WPA Supplicant - roboswitch driver interface * Copyright (c) 2008-2012 Jouke Witteveen * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "includes.h" #include <sys/ioctl.h> #include <linux/sockios.h> #include <linux/if_ether.h> #include <linux/mii.h> #include <net/if.h> #include "common.h" #include "driver.h" #include "l2_packet/l2_packet.h" #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) { wpa_printf(MSG_ERROR, "ioctl[SIOCGMIIREG]: %s", strerror(errno)); 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) { wpa_printf(MSG_ERROR, "ioctl[SIOCSMIIREG]: %s", strerror(errno)); } } 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) drv_event_eapol_rx(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 */ if (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) || os_memcmp(read1, read2, 6) != 0) return -1; if (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) || 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 '.' separating <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) { wpa_printf(MSG_ERROR, "ioctl[SIOCGMIIPHY]: %s", strerror(errno)); os_free(drv); return NULL; } /* BCM63xx devices provide 0 here */ if (if_mii(&drv->ifr)->phy_id != ROBO_PHY_ADDR && if_mii(&drv->ifr)->phy_id != 0) { 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, };