1 /* 2 * WPA Supplicant - roboswitch driver interface 3 * Copyright (c) 2008-2009 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 perror("ioctl[SIOCGMIIREG]"); 95 return 0x00; 96 } 97 return mii->val_out; 98 } 99 100 101 static void wpa_driver_roboswitch_mdio_write( 102 struct wpa_driver_roboswitch_data *drv, u8 reg, u16 val) 103 { 104 struct mii_ioctl_data *mii = if_mii(&drv->ifr); 105 106 mii->phy_id = ROBO_PHY_ADDR; 107 mii->reg_num = reg; 108 mii->val_in = val; 109 110 if (ioctl(drv->fd, SIOCSMIIREG, &drv->ifr) < 0) { 111 perror("ioctl[SIOCSMIIREG"); 112 } 113 } 114 115 116 static int wpa_driver_roboswitch_reg(struct wpa_driver_roboswitch_data *drv, 117 u8 page, u8 reg, u8 op) 118 { 119 int i; 120 121 /* set page number */ 122 wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_PAGE, 123 (page << 8) | ROBO_MII_PAGE_ENABLE); 124 /* set register address */ 125 wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_ADDR, (reg << 8) | op); 126 127 /* check if operation completed */ 128 for (i = 0; i < ROBO_MII_RETRY_MAX; ++i) { 129 if ((wpa_driver_roboswitch_mdio_read(drv, ROBO_MII_ADDR) & 3) 130 == 0) 131 return 0; 132 } 133 /* timeout */ 134 return -1; 135 } 136 137 138 static int wpa_driver_roboswitch_read(struct wpa_driver_roboswitch_data *drv, 139 u8 page, u8 reg, u16 *val, int len) 140 { 141 int i; 142 143 if (len > ROBO_MII_DATA_MAX || 144 wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_READ) < 0) 145 return -1; 146 147 for (i = 0; i < len; ++i) { 148 val[i] = wpa_driver_roboswitch_mdio_read( 149 drv, ROBO_MII_DATA_OFFSET + i); 150 } 151 152 return 0; 153 } 154 155 156 static int wpa_driver_roboswitch_write(struct wpa_driver_roboswitch_data *drv, 157 u8 page, u8 reg, u16 *val, int len) 158 { 159 int i; 160 161 if (len > ROBO_MII_DATA_MAX) return -1; 162 for (i = 0; i < len; ++i) { 163 wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_DATA_OFFSET + i, 164 val[i]); 165 } 166 return wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_WRITE); 167 } 168 169 170 static void wpa_driver_roboswitch_receive(void *priv, const u8 *src_addr, 171 const u8 *buf, size_t len) 172 { 173 struct wpa_driver_roboswitch_data *drv = priv; 174 175 if (len > 14 && WPA_GET_BE16(buf + 12) == ETH_P_EAPOL && 176 os_memcmp(buf, drv->own_addr, ETH_ALEN) == 0) 177 drv_event_eapol_rx(drv->ctx, src_addr, buf + 14, len - 14); 178 } 179 180 181 static int wpa_driver_roboswitch_get_ssid(void *priv, u8 *ssid) 182 { 183 ssid[0] = 0; 184 return 0; 185 } 186 187 188 static int wpa_driver_roboswitch_get_bssid(void *priv, u8 *bssid) 189 { 190 /* Report PAE group address as the "BSSID" for wired connection. */ 191 os_memcpy(bssid, pae_group_addr, ETH_ALEN); 192 return 0; 193 } 194 195 196 static int wpa_driver_roboswitch_get_capa(void *priv, 197 struct wpa_driver_capa *capa) 198 { 199 os_memset(capa, 0, sizeof(*capa)); 200 capa->flags = WPA_DRIVER_FLAGS_WIRED; 201 return 0; 202 } 203 204 205 static int wpa_driver_roboswitch_set_param(void *priv, const char *param) 206 { 207 struct wpa_driver_roboswitch_data *drv = priv; 208 char *sep; 209 210 if (param == NULL || os_strstr(param, "multicast_only=1") == NULL) { 211 sep = drv->ifname + os_strlen(drv->ifname); 212 *sep = '.'; 213 drv->l2 = l2_packet_init(drv->ifname, NULL, ETH_P_ALL, 214 wpa_driver_roboswitch_receive, drv, 215 1); 216 if (drv->l2 == NULL) { 217 wpa_printf(MSG_INFO, "%s: Unable to listen on %s", 218 __func__, drv->ifname); 219 return -1; 220 } 221 *sep = '\0'; 222 l2_packet_get_own_addr(drv->l2, drv->own_addr); 223 } else { 224 wpa_printf(MSG_DEBUG, "%s: Ignoring unicast frames", __func__); 225 drv->l2 = NULL; 226 } 227 return 0; 228 } 229 230 231 static const char * wpa_driver_roboswitch_get_ifname(void *priv) 232 { 233 struct wpa_driver_roboswitch_data *drv = priv; 234 return drv->ifname; 235 } 236 237 238 static int wpa_driver_roboswitch_join(struct wpa_driver_roboswitch_data *drv, 239 u16 ports, const u8 *addr) 240 { 241 u16 read1[3], read2[3], addr_be16[3]; 242 243 wpa_driver_roboswitch_addr_be16(addr, addr_be16); 244 245 if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 246 ROBO_ARLCTRL_CONF, read1, 1) < 0) 247 return -1; 248 if (!(read1[0] & (1 << 4))) { 249 /* multiport addresses are not yet enabled */ 250 read1[0] |= 1 << 4; 251 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 252 ROBO_ARLCTRL_ADDR_1, addr_be16, 3); 253 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 254 ROBO_ARLCTRL_VEC_1, &ports, 1); 255 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 256 ROBO_ARLCTRL_ADDR_2, addr_be16, 3); 257 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 258 ROBO_ARLCTRL_VEC_2, &ports, 1); 259 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 260 ROBO_ARLCTRL_CONF, read1, 1); 261 } else { 262 /* if both multiport addresses are the same we can add */ 263 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 264 ROBO_ARLCTRL_ADDR_1, read1, 3); 265 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 266 ROBO_ARLCTRL_ADDR_2, read2, 3); 267 if (os_memcmp(read1, read2, 6) != 0) 268 return -1; 269 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 270 ROBO_ARLCTRL_VEC_1, read1, 1); 271 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 272 ROBO_ARLCTRL_VEC_2, read2, 1); 273 if (read1[0] != read2[0]) 274 return -1; 275 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 276 ROBO_ARLCTRL_ADDR_1, addr_be16, 3); 277 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 278 ROBO_ARLCTRL_VEC_1, &ports, 1); 279 } 280 return 0; 281 } 282 283 284 static int wpa_driver_roboswitch_leave(struct wpa_driver_roboswitch_data *drv, 285 u16 ports, const u8 *addr) 286 { 287 u16 _read, addr_be16[3], addr_read[3], ports_read; 288 289 wpa_driver_roboswitch_addr_be16(addr, addr_be16); 290 291 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_CONF, 292 &_read, 1); 293 /* If ARL control is disabled, there is nothing to leave. */ 294 if (!(_read & (1 << 4))) return -1; 295 296 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 297 ROBO_ARLCTRL_ADDR_1, addr_read, 3); 298 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_VEC_1, 299 &ports_read, 1); 300 /* check if we occupy multiport address 1 */ 301 if (os_memcmp(addr_read, addr_be16, 6) == 0 && ports_read == ports) { 302 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 303 ROBO_ARLCTRL_ADDR_2, addr_read, 3); 304 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 305 ROBO_ARLCTRL_VEC_2, &ports_read, 1); 306 /* and multiport address 2 */ 307 if (os_memcmp(addr_read, addr_be16, 6) == 0 && 308 ports_read == ports) { 309 _read &= ~(1 << 4); 310 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 311 ROBO_ARLCTRL_CONF, &_read, 312 1); 313 } else { 314 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 315 ROBO_ARLCTRL_ADDR_1, 316 addr_read, 3); 317 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 318 ROBO_ARLCTRL_VEC_1, 319 &ports_read, 1); 320 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 321 ROBO_ARLCTRL_ADDR_2, 322 addr_read, 3); 323 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 324 ROBO_ARLCTRL_VEC_2, 325 &ports_read, 1); 326 } 327 } else { 328 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 329 ROBO_ARLCTRL_ADDR_2, addr_read, 3); 330 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, 331 ROBO_ARLCTRL_VEC_2, &ports_read, 1); 332 /* or multiport address 2 */ 333 if (os_memcmp(addr_read, addr_be16, 6) == 0 && 334 ports_read == ports) { 335 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 336 ROBO_ARLCTRL_ADDR_1, 337 addr_read, 3); 338 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE, 339 ROBO_ARLCTRL_VEC_1, 340 &ports_read, 1); 341 } else return -1; 342 } 343 return 0; 344 } 345 346 347 static void * wpa_driver_roboswitch_init(void *ctx, const char *ifname) 348 { 349 struct wpa_driver_roboswitch_data *drv; 350 char *sep; 351 u16 vlan = 0, _read[2]; 352 353 drv = os_zalloc(sizeof(*drv)); 354 if (drv == NULL) return NULL; 355 drv->ctx = ctx; 356 drv->own_addr[0] = '\0'; 357 358 /* copy ifname and take a pointer to the second to last character */ 359 sep = drv->ifname + 360 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)) - 2; 361 /* find the '.' separating <interface> and <vlan> */ 362 while (sep > drv->ifname && *sep != '.') sep--; 363 if (sep <= drv->ifname) { 364 wpa_printf(MSG_INFO, "%s: No <interface>.<vlan> pair in " 365 "interface name %s", __func__, drv->ifname); 366 os_free(drv); 367 return NULL; 368 } 369 *sep = '\0'; 370 while (*++sep) { 371 if (*sep < '0' || *sep > '9') { 372 wpa_printf(MSG_INFO, "%s: Invalid vlan specification " 373 "in interface name %s", __func__, ifname); 374 os_free(drv); 375 return NULL; 376 } 377 vlan *= 10; 378 vlan += *sep - '0'; 379 if (vlan > ROBO_VLAN_MAX) { 380 wpa_printf(MSG_INFO, "%s: VLAN out of range in " 381 "interface name %s", __func__, ifname); 382 os_free(drv); 383 return NULL; 384 } 385 } 386 387 drv->fd = socket(PF_INET, SOCK_DGRAM, 0); 388 if (drv->fd < 0) { 389 wpa_printf(MSG_INFO, "%s: Unable to create socket", __func__); 390 os_free(drv); 391 return NULL; 392 } 393 394 os_memset(&drv->ifr, 0, sizeof(drv->ifr)); 395 os_strlcpy(drv->ifr.ifr_name, drv->ifname, IFNAMSIZ); 396 if (ioctl(drv->fd, SIOCGMIIPHY, &drv->ifr) < 0) { 397 perror("ioctl[SIOCGMIIPHY]"); 398 os_free(drv); 399 return NULL; 400 } 401 if (if_mii(&drv->ifr)->phy_id != ROBO_PHY_ADDR) { 402 wpa_printf(MSG_INFO, "%s: Invalid phy address (not a " 403 "RoboSwitch?)", __func__); 404 os_free(drv); 405 return NULL; 406 } 407 408 /* set and read back to see if the register can be used */ 409 _read[0] = ROBO_VLAN_MAX; 410 wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350, 411 _read, 1); 412 wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350, 413 _read + 1, 1); 414 drv->is_5350 = _read[0] == _read[1]; 415 416 /* set the read bit */ 417 vlan |= 1 << 13; 418 wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE, 419 drv->is_5350 ? ROBO_VLAN_ACCESS_5350 420 : ROBO_VLAN_ACCESS, 421 &vlan, 1); 422 wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_READ, _read, 423 drv->is_5350 ? 2 : 1); 424 if (!(drv->is_5350 ? _read[1] & (1 << 4) : _read[0] & (1 << 14))) { 425 wpa_printf(MSG_INFO, "%s: Could not get port information for " 426 "VLAN %d", __func__, vlan & ~(1 << 13)); 427 os_free(drv); 428 return NULL; 429 } 430 drv->ports = _read[0] & 0x001F; 431 /* add the MII port */ 432 drv->ports |= 1 << 8; 433 if (wpa_driver_roboswitch_join(drv, drv->ports, pae_group_addr) < 0) { 434 wpa_printf(MSG_INFO, "%s: Unable to join PAE group", __func__); 435 os_free(drv); 436 return NULL; 437 } else { 438 wpa_printf(MSG_DEBUG, "%s: Added PAE group address to " 439 "RoboSwitch ARL", __func__); 440 } 441 442 return drv; 443 } 444 445 446 static void wpa_driver_roboswitch_deinit(void *priv) 447 { 448 struct wpa_driver_roboswitch_data *drv = priv; 449 450 if (drv->l2) { 451 l2_packet_deinit(drv->l2); 452 drv->l2 = NULL; 453 } 454 if (wpa_driver_roboswitch_leave(drv, drv->ports, pae_group_addr) < 0) { 455 wpa_printf(MSG_DEBUG, "%s: Unable to leave PAE group", 456 __func__); 457 } 458 459 close(drv->fd); 460 os_free(drv); 461 } 462 463 464 const struct wpa_driver_ops wpa_driver_roboswitch_ops = { 465 .name = "roboswitch", 466 .desc = "wpa_supplicant roboswitch driver", 467 .get_ssid = wpa_driver_roboswitch_get_ssid, 468 .get_bssid = wpa_driver_roboswitch_get_bssid, 469 .get_capa = wpa_driver_roboswitch_get_capa, 470 .init = wpa_driver_roboswitch_init, 471 .deinit = wpa_driver_roboswitch_deinit, 472 .set_param = wpa_driver_roboswitch_set_param, 473 .get_ifname = wpa_driver_roboswitch_get_ifname, 474 }; 475