1 /* 2 * WPA Supplicant - roboswitch driver interface 3 * Copyright (c) 2008-2012 Jouke Witteveen 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 #include <sys/ioctl.h> 11 #include <linux/sockios.h> 12 #include <linux/if_ether.h> 13 #include <linux/mii.h> 14 #include <net/if.h> 15 16 #include "common.h" 17 #include "driver.h" 18 #include "l2_packet/l2_packet.h" 19 20 #define ROBO_PHY_ADDR 0x1e /* RoboSwitch PHY address */ 21 22 /* MII access registers */ 23 #define ROBO_MII_PAGE 0x10 /* MII page register */ 24 #define ROBO_MII_ADDR 0x11 /* MII address register */ 25 #define ROBO_MII_DATA_OFFSET 0x18 /* Start of MII data registers */ 26 27 #define ROBO_MII_PAGE_ENABLE 0x01 /* MII page op code */ 28 #define ROBO_MII_ADDR_WRITE 0x01 /* MII address write op code */ 29 #define ROBO_MII_ADDR_READ 0x02 /* MII address read op code */ 30 #define ROBO_MII_DATA_MAX 4 /* Consecutive MII data registers */ 31 #define ROBO_MII_RETRY_MAX 10 /* Read attempts before giving up */ 32 33 /* Page numbers */ 34 #define ROBO_ARLCTRL_PAGE 0x04 /* ARL control page */ 35 #define ROBO_VLAN_PAGE 0x34 /* VLAN page */ 36 37 /* ARL control page registers */ 38 #define ROBO_ARLCTRL_CONF 0x00 /* ARL configuration register */ 39 #define ROBO_ARLCTRL_ADDR_1 0x10 /* Multiport address 1 */ 40 #define ROBO_ARLCTRL_VEC_1 0x16 /* Multiport vector 1 */ 41 #define ROBO_ARLCTRL_ADDR_2 0x20 /* Multiport address 2 */ 42 #define ROBO_ARLCTRL_VEC_2 0x26 /* Multiport vector 2 */ 43 44 /* VLAN page registers */ 45 #define ROBO_VLAN_ACCESS 0x08 /* VLAN table access register */ 46 #define ROBO_VLAN_ACCESS_5350 0x06 /* VLAN table access register (5350) */ 47 #define ROBO_VLAN_READ 0x0c /* VLAN read register */ 48 #define ROBO_VLAN_MAX 0xff /* Maximum number of VLANs */ 49 50 51 static const u8 pae_group_addr[ETH_ALEN] = 52 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 }; 53 54 55 struct wpa_driver_roboswitch_data { 56 void *ctx; 57 struct l2_packet_data *l2; 58 char ifname[IFNAMSIZ + 1]; 59 u8 own_addr[ETH_ALEN]; 60 struct ifreq ifr; 61 int fd, is_5350; 62 u16 ports; 63 }; 64 65 66 /* Copied from the kernel-only part of mii.h. */ 67 static inline struct mii_ioctl_data *if_mii(struct ifreq *rq) 68 { 69 return (struct mii_ioctl_data *) &rq->ifr_ifru; 70 } 71 72 73 /* 74 * RoboSwitch uses 16-bit Big Endian addresses. 75 * The ordering of the words is reversed in the MII registers. 76 */ 77 static void wpa_driver_roboswitch_addr_be16(const u8 addr[ETH_ALEN], u16 *be) 78 { 79 int i; 80 for (i = 0; i < ETH_ALEN; i += 2) 81 be[(ETH_ALEN - i) / 2 - 1] = WPA_GET_BE16(addr + i); 82 } 83 84 85 static u16 wpa_driver_roboswitch_mdio_read( 86 struct wpa_driver_roboswitch_data *drv, u8 reg) 87 { 88 struct mii_ioctl_data *mii = if_mii(&drv->ifr); 89 90 mii->phy_id = ROBO_PHY_ADDR; 91 mii->reg_num = reg; 92 93 if (ioctl(drv->fd, SIOCGMIIREG, &drv->ifr) < 0) { 94 wpa_printf(MSG_ERROR, "ioctl[SIOCGMIIREG]: %s", 95 strerror(errno)); 96 return 0x00; 97 } 98 return mii->val_out; 99 } 100 101 102 static void wpa_driver_roboswitch_mdio_write( 103 struct wpa_driver_roboswitch_data *drv, u8 reg, u16 val) 104 { 105 struct mii_ioctl_data *mii = if_mii(&drv->ifr); 106 107 mii->phy_id = ROBO_PHY_ADDR; 108 mii->reg_num = reg; 109 mii->val_in = val; 110 111 if (ioctl(drv->fd, SIOCSMIIREG, &drv->ifr) < 0) { 112 wpa_printf(MSG_ERROR, "ioctl[SIOCSMIIREG]: %s", 113 strerror(errno)); 114 } 115 } 116 117 118 static int wpa_driver_roboswitch_reg(struct wpa_driver_roboswitch_data *drv, 119 u8 page, u8 reg, u8 op) 120 { 121 int i; 122 123 /* set page number */ 124 wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_PAGE, 125 (page << 8) | ROBO_MII_PAGE_ENABLE); 126 /* set register address */ 127 wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_ADDR, (reg << 8) | op); 128 129 /* check if operation completed */ 130 for (i = 0; i < ROBO_MII_RETRY_MAX; ++i) { 131 if ((wpa_driver_roboswitch_mdio_read(drv, ROBO_MII_ADDR) & 3) 132 == 0) 133 return 0; 134 } 135 /* timeout */ 136 return -1; 137 } 138 139 140 static int wpa_driver_roboswitch_read(struct wpa_driver_roboswitch_data *drv, 141 u8 page, u8 reg, u16 *val, int len) 142 { 143 int i; 144 145 if (len > ROBO_MII_DATA_MAX || 146 wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_READ) < 0) 147 return -1; 148 149 for (i = 0; i < len; ++i) { 150 val[i] = wpa_driver_roboswitch_mdio_read( 151 drv, ROBO_MII_DATA_OFFSET + i); 152 } 153 154 return 0; 155 } 156 157 158 static int wpa_driver_roboswitch_write(struct wpa_driver_roboswitch_data *drv, 159 u8 page, u8 reg, u16 *val, int len) 160 { 161 int i; 162 163 if (len > ROBO_MII_DATA_MAX) return -1; 164 for (i = 0; i < len; ++i) { 165 wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_DATA_OFFSET + i, 166 val[i]); 167 } 168 return wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_WRITE); 169 } 170 171 172 static void wpa_driver_roboswitch_receive(void *priv, const u8 *src_addr, 173 const u8 *buf, size_t len) 174 { 175 struct wpa_driver_roboswitch_data *drv = priv; 176 177 if (len > 14 && WPA_GET_BE16(buf + 12) == ETH_P_EAPOL && 178 os_memcmp(buf, drv->own_addr, ETH_ALEN) == 0) 179 drv_event_eapol_rx(drv->ctx, src_addr, buf + 14, len - 14); 180 } 181 182 183 static int wpa_driver_roboswitch_get_ssid(void *priv, u8 *ssid) 184 { 185 ssid[0] = 0; 186 return 0; 187 } 188 189 190 static int wpa_driver_roboswitch_get_bssid(void *priv, u8 *bssid) 191 { 192 /* Report PAE group address as the "BSSID" for wired connection. */ 193 os_memcpy(bssid, pae_group_addr, ETH_ALEN); 194 return 0; 195 } 196 197 198 static int wpa_driver_roboswitch_get_capa(void *priv, 199 struct wpa_driver_capa *capa) 200 { 201 os_memset(capa, 0, sizeof(*capa)); 202 capa->flags = WPA_DRIVER_FLAGS_WIRED; 203 return 0; 204 } 205 206 207 static int wpa_driver_roboswitch_set_param(void *priv, const char *param) 208 { 209 struct wpa_driver_roboswitch_data *drv = priv; 210 char *sep; 211 212 if (param == NULL || os_strstr(param, "multicast_only=1") == NULL) { 213 sep = drv->ifname + os_strlen(drv->ifname); 214 *sep = '.'; 215 drv->l2 = l2_packet_init(drv->ifname, NULL, ETH_P_ALL, 216 wpa_driver_roboswitch_receive, drv, 217 1); 218 if (drv->l2 == NULL) { 219 wpa_printf(MSG_INFO, "%s: Unable to listen on %s", 220 __func__, drv->ifname); 221 return -1; 222 } 223 *sep = '\0'; 224 l2_packet_get_own_addr(drv->l2, drv->own_addr); 225 } else { 226 wpa_printf(MSG_DEBUG, "%s: Ignoring unicast frames", __func__); 227 drv->l2 = NULL; 228 } 229 return 0; 230 } 231 232 233 static const char * wpa_driver_roboswitch_get_ifname(void *priv) 234 { 235 struct wpa_driver_roboswitch_data *drv = priv; 236 return drv->ifname; 237 } 238 239 240 static int wpa_driver_roboswitch_join(struct wpa_driver_roboswitch_data *drv, 241 u16 ports, const u8 *addr) 242 { 243 u16 read1[3], read2[3], addr_be16[3]; 244 245 wpa_driver_roboswitch_addr_be16(addr, addr_be16); 246 247 if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 248 ROBO_ARLCTRL_CONF, read1, 1) < 0) 249 return -1; 250 if (!(read1[0] & (1 << 4))) { 251 /* multiport addresses are not yet enabled */ 252 read1[0] |= 1 << 4; 253 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 254 ROBO_ARLCTRL_ADDR_1, addr_be16, 3); 255 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 256 ROBO_ARLCTRL_VEC_1, &ports, 1); 257 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 258 ROBO_ARLCTRL_ADDR_2, addr_be16, 3); 259 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 260 ROBO_ARLCTRL_VEC_2, &ports, 1); 261 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 262 ROBO_ARLCTRL_CONF, read1, 1); 263 } else { 264 /* if both multiport addresses are the same we can add */ 265 if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 266 ROBO_ARLCTRL_ADDR_1, read1, 3) || 267 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 268 ROBO_ARLCTRL_ADDR_2, read2, 3) || 269 os_memcmp(read1, read2, 6) != 0) 270 return -1; 271 if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 272 ROBO_ARLCTRL_VEC_1, read1, 1) || 273 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 274 ROBO_ARLCTRL_VEC_2, read2, 1) || 275 read1[0] != read2[0]) 276 return -1; 277 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 278 ROBO_ARLCTRL_ADDR_1, addr_be16, 3); 279 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 280 ROBO_ARLCTRL_VEC_1, &ports, 1); 281 } 282 return 0; 283 } 284 285 286 static int wpa_driver_roboswitch_leave(struct wpa_driver_roboswitch_data *drv, 287 u16 ports, const u8 *addr) 288 { 289 u16 _read, addr_be16[3], addr_read[3], ports_read; 290 291 wpa_driver_roboswitch_addr_be16(addr, addr_be16); 292 293 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_CONF, 294 &_read, 1); 295 /* If ARL control is disabled, there is nothing to leave. */ 296 if (!(_read & (1 << 4))) return -1; 297 298 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 299 ROBO_ARLCTRL_ADDR_1, addr_read, 3); 300 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_VEC_1, 301 &ports_read, 1); 302 /* check if we occupy multiport address 1 */ 303 if (os_memcmp(addr_read, addr_be16, 6) == 0 && ports_read == ports) { 304 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 305 ROBO_ARLCTRL_ADDR_2, addr_read, 3); 306 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 307 ROBO_ARLCTRL_VEC_2, &ports_read, 1); 308 /* and multiport address 2 */ 309 if (os_memcmp(addr_read, addr_be16, 6) == 0 && 310 ports_read == ports) { 311 _read &= ~(1 << 4); 312 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 313 ROBO_ARLCTRL_CONF, &_read, 314 1); 315 } else { 316 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 317 ROBO_ARLCTRL_ADDR_1, 318 addr_read, 3); 319 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 320 ROBO_ARLCTRL_VEC_1, 321 &ports_read, 1); 322 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 323 ROBO_ARLCTRL_ADDR_2, 324 addr_read, 3); 325 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 326 ROBO_ARLCTRL_VEC_2, 327 &ports_read, 1); 328 } 329 } else { 330 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 331 ROBO_ARLCTRL_ADDR_2, addr_read, 3); 332 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 333 ROBO_ARLCTRL_VEC_2, &ports_read, 1); 334 /* or multiport address 2 */ 335 if (os_memcmp(addr_read, addr_be16, 6) == 0 && 336 ports_read == ports) { 337 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 338 ROBO_ARLCTRL_ADDR_1, 339 addr_read, 3); 340 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 341 ROBO_ARLCTRL_VEC_1, 342 &ports_read, 1); 343 } else return -1; 344 } 345 return 0; 346 } 347 348 349 static void * wpa_driver_roboswitch_init(void *ctx, const char *ifname) 350 { 351 struct wpa_driver_roboswitch_data *drv; 352 char *sep; 353 u16 vlan = 0, _read[2]; 354 355 drv = os_zalloc(sizeof(*drv)); 356 if (drv == NULL) return NULL; 357 drv->ctx = ctx; 358 drv->own_addr[0] = '\0'; 359 360 /* copy ifname and take a pointer to the second to last character */ 361 sep = drv->ifname + 362 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)) - 2; 363 /* find the '.' separating <interface> and <vlan> */ 364 while (sep > drv->ifname && *sep != '.') sep--; 365 if (sep <= drv->ifname) { 366 wpa_printf(MSG_INFO, "%s: No <interface>.<vlan> pair in " 367 "interface name %s", __func__, drv->ifname); 368 os_free(drv); 369 return NULL; 370 } 371 *sep = '\0'; 372 while (*++sep) { 373 if (*sep < '0' || *sep > '9') { 374 wpa_printf(MSG_INFO, "%s: Invalid vlan specification " 375 "in interface name %s", __func__, ifname); 376 os_free(drv); 377 return NULL; 378 } 379 vlan *= 10; 380 vlan += *sep - '0'; 381 if (vlan > ROBO_VLAN_MAX) { 382 wpa_printf(MSG_INFO, "%s: VLAN out of range in " 383 "interface name %s", __func__, ifname); 384 os_free(drv); 385 return NULL; 386 } 387 } 388 389 drv->fd = socket(PF_INET, SOCK_DGRAM, 0); 390 if (drv->fd < 0) { 391 wpa_printf(MSG_INFO, "%s: Unable to create socket", __func__); 392 os_free(drv); 393 return NULL; 394 } 395 396 os_memset(&drv->ifr, 0, sizeof(drv->ifr)); 397 os_strlcpy(drv->ifr.ifr_name, drv->ifname, IFNAMSIZ); 398 if (ioctl(drv->fd, SIOCGMIIPHY, &drv->ifr) < 0) { 399 wpa_printf(MSG_ERROR, "ioctl[SIOCGMIIPHY]: %s", 400 strerror(errno)); 401 os_free(drv); 402 return NULL; 403 } 404 /* BCM63xx devices provide 0 here */ 405 if (if_mii(&drv->ifr)->phy_id != ROBO_PHY_ADDR && 406 if_mii(&drv->ifr)->phy_id != 0) { 407 wpa_printf(MSG_INFO, "%s: Invalid phy address (not a " 408 "RoboSwitch?)", __func__); 409 os_free(drv); 410 return NULL; 411 } 412 413 /* set and read back to see if the register can be used */ 414 _read[0] = ROBO_VLAN_MAX; 415 wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350, 416 _read, 1); 417 wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350, 418 _read + 1, 1); 419 drv->is_5350 = _read[0] == _read[1]; 420 421 /* set the read bit */ 422 vlan |= 1 << 13; 423 wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE, 424 drv->is_5350 ? ROBO_VLAN_ACCESS_5350 425 : ROBO_VLAN_ACCESS, 426 &vlan, 1); 427 wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_READ, _read, 428 drv->is_5350 ? 2 : 1); 429 if (!(drv->is_5350 ? _read[1] & (1 << 4) : _read[0] & (1 << 14))) { 430 wpa_printf(MSG_INFO, "%s: Could not get port information for " 431 "VLAN %d", __func__, vlan & ~(1 << 13)); 432 os_free(drv); 433 return NULL; 434 } 435 drv->ports = _read[0] & 0x001F; 436 /* add the MII port */ 437 drv->ports |= 1 << 8; 438 if (wpa_driver_roboswitch_join(drv, drv->ports, pae_group_addr) < 0) { 439 wpa_printf(MSG_INFO, "%s: Unable to join PAE group", __func__); 440 os_free(drv); 441 return NULL; 442 } else { 443 wpa_printf(MSG_DEBUG, "%s: Added PAE group address to " 444 "RoboSwitch ARL", __func__); 445 } 446 447 return drv; 448 } 449 450 451 static void wpa_driver_roboswitch_deinit(void *priv) 452 { 453 struct wpa_driver_roboswitch_data *drv = priv; 454 455 if (drv->l2) { 456 l2_packet_deinit(drv->l2); 457 drv->l2 = NULL; 458 } 459 if (wpa_driver_roboswitch_leave(drv, drv->ports, pae_group_addr) < 0) { 460 wpa_printf(MSG_DEBUG, "%s: Unable to leave PAE group", 461 __func__); 462 } 463 464 close(drv->fd); 465 os_free(drv); 466 } 467 468 469 const struct wpa_driver_ops wpa_driver_roboswitch_ops = { 470 .name = "roboswitch", 471 .desc = "wpa_supplicant roboswitch driver", 472 .get_ssid = wpa_driver_roboswitch_get_ssid, 473 .get_bssid = wpa_driver_roboswitch_get_bssid, 474 .get_capa = wpa_driver_roboswitch_get_capa, 475 .init = wpa_driver_roboswitch_init, 476 .deinit = wpa_driver_roboswitch_deinit, 477 .set_param = wpa_driver_roboswitch_set_param, 478 .get_ifname = wpa_driver_roboswitch_get_ifname, 479 }; 480
