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. */
if_mii(struct ifreq * rq)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 */
wpa_driver_roboswitch_addr_be16(const u8 addr[ETH_ALEN],u16 * be)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
wpa_driver_roboswitch_mdio_read(struct wpa_driver_roboswitch_data * drv,u8 reg)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
wpa_driver_roboswitch_mdio_write(struct wpa_driver_roboswitch_data * drv,u8 reg,u16 val)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
wpa_driver_roboswitch_reg(struct wpa_driver_roboswitch_data * drv,u8 page,u8 reg,u8 op)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
wpa_driver_roboswitch_read(struct wpa_driver_roboswitch_data * drv,u8 page,u8 reg,u16 * val,int len)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
wpa_driver_roboswitch_write(struct wpa_driver_roboswitch_data * drv,u8 page,u8 reg,u16 * val,int len)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
wpa_driver_roboswitch_receive(void * priv,const u8 * src_addr,const u8 * buf,size_t len)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
wpa_driver_roboswitch_get_ssid(void * priv,u8 * ssid)183 static int wpa_driver_roboswitch_get_ssid(void *priv, u8 *ssid)
184 {
185 ssid[0] = 0;
186 return 0;
187 }
188
189
wpa_driver_roboswitch_get_bssid(void * priv,u8 * bssid)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
wpa_driver_roboswitch_get_capa(void * priv,struct wpa_driver_capa * capa)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
wpa_driver_roboswitch_set_param(void * priv,const char * param)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
wpa_driver_roboswitch_get_ifname(void * priv)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
wpa_driver_roboswitch_join(struct wpa_driver_roboswitch_data * drv,u16 ports,const u8 * addr)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
wpa_driver_roboswitch_leave(struct wpa_driver_roboswitch_data * drv,u16 ports,const u8 * addr)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 if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
294 ROBO_ARLCTRL_CONF, &_read, 1) < 0)
295 return -1;
296 /* If ARL control is disabled, there is nothing to leave. */
297 if (!(_read & (1 << 4))) return -1;
298
299 if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
300 ROBO_ARLCTRL_ADDR_1, addr_read, 3) < 0 ||
301 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
302 ROBO_ARLCTRL_VEC_1, &ports_read, 1) < 0)
303 return -1;
304 /* check if we occupy multiport address 1 */
305 if (os_memcmp(addr_read, addr_be16, 6) == 0 && ports_read == ports) {
306 if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
307 ROBO_ARLCTRL_ADDR_2, addr_read,
308 3) < 0 ||
309 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
310 ROBO_ARLCTRL_VEC_2, &ports_read,
311 1) < 0)
312 return -1;
313 /* and multiport address 2 */
314 if (os_memcmp(addr_read, addr_be16, 6) == 0 &&
315 ports_read == ports) {
316 _read &= ~(1 << 4);
317 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
318 ROBO_ARLCTRL_CONF, &_read,
319 1);
320 } else {
321 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
322 ROBO_ARLCTRL_ADDR_1,
323 addr_read, 3);
324 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
325 ROBO_ARLCTRL_VEC_1,
326 &ports_read, 1);
327 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
328 ROBO_ARLCTRL_ADDR_2,
329 addr_read, 3);
330 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
331 ROBO_ARLCTRL_VEC_2,
332 &ports_read, 1);
333 }
334 } else {
335 if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
336 ROBO_ARLCTRL_ADDR_2, addr_read,
337 3) < 0 ||
338 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
339 ROBO_ARLCTRL_VEC_2, &ports_read,
340 1) < 0)
341 return -1;
342 /* or multiport address 2 */
343 if (os_memcmp(addr_read, addr_be16, 6) == 0 &&
344 ports_read == ports) {
345 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
346 ROBO_ARLCTRL_ADDR_1,
347 addr_read, 3);
348 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
349 ROBO_ARLCTRL_VEC_1,
350 &ports_read, 1);
351 } else return -1;
352 }
353 return 0;
354 }
355
356
wpa_driver_roboswitch_init(void * ctx,const char * ifname)357 static void * wpa_driver_roboswitch_init(void *ctx, const char *ifname)
358 {
359 struct wpa_driver_roboswitch_data *drv;
360 char *sep;
361 u16 vlan = 0, _read[2];
362
363 drv = os_zalloc(sizeof(*drv));
364 if (drv == NULL) return NULL;
365 drv->ctx = ctx;
366 drv->own_addr[0] = '\0';
367
368 /* copy ifname and take a pointer to the second to last character */
369 sep = drv->ifname +
370 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)) - 2;
371 /* find the '.' separating <interface> and <vlan> */
372 while (sep > drv->ifname && *sep != '.') sep--;
373 if (sep <= drv->ifname) {
374 wpa_printf(MSG_INFO, "%s: No <interface>.<vlan> pair in "
375 "interface name %s", __func__, drv->ifname);
376 os_free(drv);
377 return NULL;
378 }
379 *sep = '\0';
380 while (*++sep) {
381 if (*sep < '0' || *sep > '9') {
382 wpa_printf(MSG_INFO, "%s: Invalid vlan specification "
383 "in interface name %s", __func__, ifname);
384 os_free(drv);
385 return NULL;
386 }
387 vlan *= 10;
388 vlan += *sep - '0';
389 if (vlan > ROBO_VLAN_MAX) {
390 wpa_printf(MSG_INFO, "%s: VLAN out of range in "
391 "interface name %s", __func__, ifname);
392 os_free(drv);
393 return NULL;
394 }
395 }
396
397 drv->fd = socket(PF_INET, SOCK_DGRAM, 0);
398 if (drv->fd < 0) {
399 wpa_printf(MSG_INFO, "%s: Unable to create socket", __func__);
400 os_free(drv);
401 return NULL;
402 }
403
404 os_memset(&drv->ifr, 0, sizeof(drv->ifr));
405 os_strlcpy(drv->ifr.ifr_name, drv->ifname, IFNAMSIZ);
406 if (ioctl(drv->fd, SIOCGMIIPHY, &drv->ifr) < 0) {
407 wpa_printf(MSG_ERROR, "ioctl[SIOCGMIIPHY]: %s",
408 strerror(errno));
409 os_free(drv);
410 return NULL;
411 }
412 /* BCM63xx devices provide 0 here */
413 if (if_mii(&drv->ifr)->phy_id != ROBO_PHY_ADDR &&
414 if_mii(&drv->ifr)->phy_id != 0) {
415 wpa_printf(MSG_INFO, "%s: Invalid phy address (not a "
416 "RoboSwitch?)", __func__);
417 os_free(drv);
418 return NULL;
419 }
420
421 /* set and read back to see if the register can be used */
422 _read[0] = ROBO_VLAN_MAX;
423 wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350,
424 _read, 1);
425 wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350,
426 _read + 1, 1);
427 drv->is_5350 = _read[0] == _read[1];
428
429 /* set the read bit */
430 vlan |= 1 << 13;
431 wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE,
432 drv->is_5350 ? ROBO_VLAN_ACCESS_5350
433 : ROBO_VLAN_ACCESS,
434 &vlan, 1);
435 wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_READ, _read,
436 drv->is_5350 ? 2 : 1);
437 if (!(drv->is_5350 ? _read[1] & (1 << 4) : _read[0] & (1 << 14))) {
438 wpa_printf(MSG_INFO, "%s: Could not get port information for "
439 "VLAN %d", __func__, vlan & ~(1 << 13));
440 os_free(drv);
441 return NULL;
442 }
443 drv->ports = _read[0] & 0x001F;
444 /* add the MII port */
445 drv->ports |= 1 << 8;
446 if (wpa_driver_roboswitch_join(drv, drv->ports, pae_group_addr) < 0) {
447 wpa_printf(MSG_INFO, "%s: Unable to join PAE group", __func__);
448 os_free(drv);
449 return NULL;
450 } else {
451 wpa_printf(MSG_DEBUG, "%s: Added PAE group address to "
452 "RoboSwitch ARL", __func__);
453 }
454
455 return drv;
456 }
457
458
wpa_driver_roboswitch_deinit(void * priv)459 static void wpa_driver_roboswitch_deinit(void *priv)
460 {
461 struct wpa_driver_roboswitch_data *drv = priv;
462
463 if (drv->l2) {
464 l2_packet_deinit(drv->l2);
465 drv->l2 = NULL;
466 }
467 if (wpa_driver_roboswitch_leave(drv, drv->ports, pae_group_addr) < 0) {
468 wpa_printf(MSG_DEBUG, "%s: Unable to leave PAE group",
469 __func__);
470 }
471
472 close(drv->fd);
473 os_free(drv);
474 }
475
476
477 const struct wpa_driver_ops wpa_driver_roboswitch_ops = {
478 .name = "roboswitch",
479 .desc = "wpa_supplicant roboswitch driver",
480 .get_ssid = wpa_driver_roboswitch_get_ssid,
481 .get_bssid = wpa_driver_roboswitch_get_bssid,
482 .get_capa = wpa_driver_roboswitch_get_capa,
483 .init = wpa_driver_roboswitch_init,
484 .deinit = wpa_driver_roboswitch_deinit,
485 .set_param = wpa_driver_roboswitch_set_param,
486 .get_ifname = wpa_driver_roboswitch_get_ifname,
487 };
488