Disconnect hostapd from building in base
[dragonfly.git] / contrib / hostapd / src / drivers / driver_wired.c
CommitLineData
a875087d 1/*
4781064b
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2 * Wired Ethernet driver interface
3 * Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2004, Gunter Burchardt <tira@isx.de>
a875087d 5 *
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6 * This software may be distributed under the terms of the BSD license.
7 * See README for more details.
a875087d
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8 */
9
10#include "includes.h"
11#include <sys/ioctl.h>
12#include <net/if.h>
13#ifdef __linux__
14#include <netpacket/packet.h>
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15#include <net/if_arp.h>
16#include <net/if.h>
a875087d 17#endif /* __linux__ */
4781064b 18#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
a875087d 19#include <net/if_dl.h>
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20#include <net/if_media.h>
21#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__) */
22#ifdef __sun__
23#include <sys/sockio.h>
24#endif /* __sun__ */
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25
26#include "common.h"
4781064b 27#include "eloop.h"
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28#include "driver.h"
29
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30#ifdef _MSC_VER
31#pragma pack(push, 1)
32#endif /* _MSC_VER */
33
34struct ieee8023_hdr {
35 u8 dest[6];
36 u8 src[6];
37 u16 ethertype;
38} STRUCT_PACKED;
39
40#ifdef _MSC_VER
41#pragma pack(pop)
42#endif /* _MSC_VER */
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43
44static const u8 pae_group_addr[ETH_ALEN] =
45{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
46
47
48struct wpa_driver_wired_data {
4781064b 49 char ifname[IFNAMSIZ + 1];
a875087d 50 void *ctx;
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51
52 int sock; /* raw packet socket for driver access */
53 int dhcp_sock; /* socket for dhcp packets */
54 int use_pae_group_addr;
55
a875087d 56 int pf_sock;
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57 int membership, multi, iff_allmulti, iff_up;
58};
59
60
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61/* TODO: detecting new devices should eventually be changed from using DHCP
62 * snooping to trigger on any packet from a new layer 2 MAC address, e.g.,
63 * based on ebtables, etc. */
64
65struct dhcp_message {
66 u_int8_t op;
67 u_int8_t htype;
68 u_int8_t hlen;
69 u_int8_t hops;
70 u_int32_t xid;
71 u_int16_t secs;
72 u_int16_t flags;
73 u_int32_t ciaddr;
74 u_int32_t yiaddr;
75 u_int32_t siaddr;
76 u_int32_t giaddr;
77 u_int8_t chaddr[16];
78 u_int8_t sname[64];
79 u_int8_t file[128];
80 u_int32_t cookie;
81 u_int8_t options[308]; /* 312 - cookie */
82};
83
84
85static int wired_multicast_membership(int sock, int ifindex,
86 const u8 *addr, int add)
87{
88#ifdef __linux__
89 struct packet_mreq mreq;
90
91 if (sock < 0)
92 return -1;
93
94 os_memset(&mreq, 0, sizeof(mreq));
95 mreq.mr_ifindex = ifindex;
96 mreq.mr_type = PACKET_MR_MULTICAST;
97 mreq.mr_alen = ETH_ALEN;
98 os_memcpy(mreq.mr_address, addr, ETH_ALEN);
99
100 if (setsockopt(sock, SOL_PACKET,
101 add ? PACKET_ADD_MEMBERSHIP : PACKET_DROP_MEMBERSHIP,
102 &mreq, sizeof(mreq)) < 0) {
103 perror("setsockopt");
104 return -1;
105 }
106 return 0;
107#else /* __linux__ */
108 return -1;
109#endif /* __linux__ */
110}
111
112
113#ifdef __linux__
114static void handle_data(void *ctx, unsigned char *buf, size_t len)
115{
116#ifdef HOSTAPD
117 struct ieee8023_hdr *hdr;
118 u8 *pos, *sa;
119 size_t left;
120 union wpa_event_data event;
121
122 /* must contain at least ieee8023_hdr 6 byte source, 6 byte dest,
123 * 2 byte ethertype */
124 if (len < 14) {
125 wpa_printf(MSG_MSGDUMP, "handle_data: too short (%lu)",
126 (unsigned long) len);
127 return;
128 }
129
130 hdr = (struct ieee8023_hdr *) buf;
131
132 switch (ntohs(hdr->ethertype)) {
133 case ETH_P_PAE:
134 wpa_printf(MSG_MSGDUMP, "Received EAPOL packet");
135 sa = hdr->src;
136 os_memset(&event, 0, sizeof(event));
137 event.new_sta.addr = sa;
138 wpa_supplicant_event(ctx, EVENT_NEW_STA, &event);
139
140 pos = (u8 *) (hdr + 1);
141 left = len - sizeof(*hdr);
142 drv_event_eapol_rx(ctx, sa, pos, left);
143 break;
144
145 default:
146 wpa_printf(MSG_DEBUG, "Unknown ethertype 0x%04x in data frame",
147 ntohs(hdr->ethertype));
148 break;
149 }
150#endif /* HOSTAPD */
151}
152
153
154static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
155{
156 int len;
157 unsigned char buf[3000];
158
159 len = recv(sock, buf, sizeof(buf), 0);
160 if (len < 0) {
161 perror("recv");
162 return;
163 }
164
165 handle_data(eloop_ctx, buf, len);
166}
167
168
169static void handle_dhcp(int sock, void *eloop_ctx, void *sock_ctx)
170{
171 int len;
172 unsigned char buf[3000];
173 struct dhcp_message *msg;
174 u8 *mac_address;
175 union wpa_event_data event;
176
177 len = recv(sock, buf, sizeof(buf), 0);
178 if (len < 0) {
179 perror("recv");
180 return;
181 }
182
183 /* must contain at least dhcp_message->chaddr */
184 if (len < 44) {
185 wpa_printf(MSG_MSGDUMP, "handle_dhcp: too short (%d)", len);
186 return;
187 }
188
189 msg = (struct dhcp_message *) buf;
190 mac_address = (u8 *) &(msg->chaddr);
191
192 wpa_printf(MSG_MSGDUMP, "Got DHCP broadcast packet from " MACSTR,
193 MAC2STR(mac_address));
194
195 os_memset(&event, 0, sizeof(event));
196 event.new_sta.addr = mac_address;
197 wpa_supplicant_event(eloop_ctx, EVENT_NEW_STA, &event);
198}
199#endif /* __linux__ */
200
201
202static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
203{
204#ifdef __linux__
205 struct ifreq ifr;
206 struct sockaddr_ll addr;
207 struct sockaddr_in addr2;
208 int n = 1;
209
210 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
211 if (drv->sock < 0) {
212 perror("socket[PF_PACKET,SOCK_RAW]");
213 return -1;
214 }
215
216 if (eloop_register_read_sock(drv->sock, handle_read, drv->ctx, NULL)) {
217 printf("Could not register read socket\n");
218 return -1;
219 }
220
221 os_memset(&ifr, 0, sizeof(ifr));
222 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
223 if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
224 perror("ioctl(SIOCGIFINDEX)");
225 return -1;
226 }
227
228 os_memset(&addr, 0, sizeof(addr));
229 addr.sll_family = AF_PACKET;
230 addr.sll_ifindex = ifr.ifr_ifindex;
231 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
232 addr.sll_ifindex);
233
234 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
235 perror("bind");
236 return -1;
237 }
238
239 /* filter multicast address */
240 if (wired_multicast_membership(drv->sock, ifr.ifr_ifindex,
241 pae_group_addr, 1) < 0) {
242 wpa_printf(MSG_ERROR, "wired: Failed to add multicast group "
243 "membership");
244 return -1;
245 }
246
247 os_memset(&ifr, 0, sizeof(ifr));
248 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
249 if (ioctl(drv->sock, SIOCGIFHWADDR, &ifr) != 0) {
250 perror("ioctl(SIOCGIFHWADDR)");
251 return -1;
252 }
253
254 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
255 printf("Invalid HW-addr family 0x%04x\n",
256 ifr.ifr_hwaddr.sa_family);
257 return -1;
258 }
259 os_memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
260
261 /* setup dhcp listen socket for sta detection */
262 if ((drv->dhcp_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
263 perror("socket call failed for dhcp");
264 return -1;
265 }
266
267 if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp, drv->ctx,
268 NULL)) {
269 printf("Could not register read socket\n");
270 return -1;
271 }
272
273 os_memset(&addr2, 0, sizeof(addr2));
274 addr2.sin_family = AF_INET;
275 addr2.sin_port = htons(67);
276 addr2.sin_addr.s_addr = INADDR_ANY;
277
278 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_REUSEADDR, (char *) &n,
279 sizeof(n)) == -1) {
280 perror("setsockopt[SOL_SOCKET,SO_REUSEADDR]");
281 return -1;
282 }
283 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BROADCAST, (char *) &n,
284 sizeof(n)) == -1) {
285 perror("setsockopt[SOL_SOCKET,SO_BROADCAST]");
286 return -1;
287 }
288
289 os_memset(&ifr, 0, sizeof(ifr));
290 os_strlcpy(ifr.ifr_ifrn.ifrn_name, drv->ifname, IFNAMSIZ);
291 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BINDTODEVICE,
292 (char *) &ifr, sizeof(ifr)) < 0) {
293 perror("setsockopt[SOL_SOCKET,SO_BINDTODEVICE]");
294 return -1;
295 }
296
297 if (bind(drv->dhcp_sock, (struct sockaddr *) &addr2,
298 sizeof(struct sockaddr)) == -1) {
299 perror("bind");
300 return -1;
301 }
302
303 return 0;
304#else /* __linux__ */
305 return -1;
306#endif /* __linux__ */
307}
308
309
310static int wired_send_eapol(void *priv, const u8 *addr,
311 const u8 *data, size_t data_len, int encrypt,
312 const u8 *own_addr, u32 flags)
313{
314 struct wpa_driver_wired_data *drv = priv;
315 struct ieee8023_hdr *hdr;
316 size_t len;
317 u8 *pos;
318 int res;
319
320 len = sizeof(*hdr) + data_len;
321 hdr = os_zalloc(len);
322 if (hdr == NULL) {
323 printf("malloc() failed for wired_send_eapol(len=%lu)\n",
324 (unsigned long) len);
325 return -1;
326 }
327
328 os_memcpy(hdr->dest, drv->use_pae_group_addr ? pae_group_addr : addr,
329 ETH_ALEN);
330 os_memcpy(hdr->src, own_addr, ETH_ALEN);
331 hdr->ethertype = htons(ETH_P_PAE);
332
333 pos = (u8 *) (hdr + 1);
334 os_memcpy(pos, data, data_len);
335
336 res = send(drv->sock, (u8 *) hdr, len, 0);
337 os_free(hdr);
338
339 if (res < 0) {
340 perror("wired_send_eapol: send");
341 printf("wired_send_eapol - packet len: %lu - failed\n",
342 (unsigned long) len);
343 }
344
345 return res;
346}
347
348
349static void * wired_driver_hapd_init(struct hostapd_data *hapd,
350 struct wpa_init_params *params)
351{
352 struct wpa_driver_wired_data *drv;
353
354 drv = os_zalloc(sizeof(struct wpa_driver_wired_data));
355 if (drv == NULL) {
356 printf("Could not allocate memory for wired driver data\n");
357 return NULL;
358 }
359
360 drv->ctx = hapd;
361 os_strlcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
362 drv->use_pae_group_addr = params->use_pae_group_addr;
363
364 if (wired_init_sockets(drv, params->own_addr)) {
365 os_free(drv);
366 return NULL;
367 }
368
369 return drv;
370}
371
372
373static void wired_driver_hapd_deinit(void *priv)
374{
375 struct wpa_driver_wired_data *drv = priv;
376
377 if (drv->sock >= 0)
378 close(drv->sock);
379
380 if (drv->dhcp_sock >= 0)
381 close(drv->dhcp_sock);
382
383 os_free(drv);
384}
385
386
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387static int wpa_driver_wired_get_ssid(void *priv, u8 *ssid)
388{
389 ssid[0] = 0;
390 return 0;
391}
392
393
394static int wpa_driver_wired_get_bssid(void *priv, u8 *bssid)
395{
396 /* Report PAE group address as the "BSSID" for wired connection. */
397 os_memcpy(bssid, pae_group_addr, ETH_ALEN);
398 return 0;
399}
400
401
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402static int wpa_driver_wired_get_capa(void *priv, struct wpa_driver_capa *capa)
403{
404 os_memset(capa, 0, sizeof(*capa));
405 capa->flags = WPA_DRIVER_FLAGS_WIRED;
406 return 0;
407}
408
409
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410static int wpa_driver_wired_get_ifflags(const char *ifname, int *flags)
411{
412 struct ifreq ifr;
413 int s;
414
415 s = socket(PF_INET, SOCK_DGRAM, 0);
416 if (s < 0) {
417 perror("socket");
418 return -1;
419 }
420
421 os_memset(&ifr, 0, sizeof(ifr));
422 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
423 if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
424 perror("ioctl[SIOCGIFFLAGS]");
425 close(s);
426 return -1;
427 }
428 close(s);
429 *flags = ifr.ifr_flags & 0xffff;
430 return 0;
431}
432
433
434static int wpa_driver_wired_set_ifflags(const char *ifname, int flags)
435{
436 struct ifreq ifr;
437 int s;
438
439 s = socket(PF_INET, SOCK_DGRAM, 0);
440 if (s < 0) {
441 perror("socket");
442 return -1;
443 }
444
445 os_memset(&ifr, 0, sizeof(ifr));
446 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
447 ifr.ifr_flags = flags & 0xffff;
448 if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
449 perror("ioctl[SIOCSIFFLAGS]");
450 close(s);
451 return -1;
452 }
453 close(s);
454 return 0;
455}
456
457
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458#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
459static int wpa_driver_wired_get_ifstatus(const char *ifname, int *status)
460{
461 struct ifmediareq ifmr;
462 int s;
463
464 s = socket(PF_INET, SOCK_DGRAM, 0);
465 if (s < 0) {
466 perror("socket");
467 return -1;
468 }
469
470 os_memset(&ifmr, 0, sizeof(ifmr));
471 os_strlcpy(ifmr.ifm_name, ifname, IFNAMSIZ);
472 if (ioctl(s, SIOCGIFMEDIA, (caddr_t) &ifmr) < 0) {
473 perror("ioctl[SIOCGIFMEDIA]");
474 close(s);
475 return -1;
476 }
477 close(s);
478 *status = (ifmr.ifm_status & (IFM_ACTIVE | IFM_AVALID)) ==
479 (IFM_ACTIVE | IFM_AVALID);
480
481 return 0;
482}
483#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(FreeBSD_kernel__) */
484
485
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486static int wpa_driver_wired_multi(const char *ifname, const u8 *addr, int add)
487{
488 struct ifreq ifr;
489 int s;
490
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491#ifdef __sun__
492 return -1;
493#endif /* __sun__ */
494
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495 s = socket(PF_INET, SOCK_DGRAM, 0);
496 if (s < 0) {
497 perror("socket");
498 return -1;
499 }
500
501 os_memset(&ifr, 0, sizeof(ifr));
502 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
503#ifdef __linux__
504 ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
505 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
506#endif /* __linux__ */
4781064b 507#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
a875087d
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508 {
509 struct sockaddr_dl *dlp;
510 dlp = (struct sockaddr_dl *) &ifr.ifr_addr;
511 dlp->sdl_len = sizeof(struct sockaddr_dl);
512 dlp->sdl_family = AF_LINK;
513 dlp->sdl_index = 0;
514 dlp->sdl_nlen = 0;
515 dlp->sdl_alen = ETH_ALEN;
516 dlp->sdl_slen = 0;
4781064b 517 os_memcpy(LLADDR(dlp), addr, ETH_ALEN);
a875087d 518 }
4781064b 519#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(FreeBSD_kernel__) */
a875087d
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520#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
521 {
522 struct sockaddr *sap;
523 sap = (struct sockaddr *) &ifr.ifr_addr;
524 sap->sa_len = sizeof(struct sockaddr);
525 sap->sa_family = AF_UNSPEC;
526 os_memcpy(sap->sa_data, addr, ETH_ALEN);
527 }
528#endif /* defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__) */
529
530 if (ioctl(s, add ? SIOCADDMULTI : SIOCDELMULTI, (caddr_t) &ifr) < 0) {
531 perror("ioctl[SIOC{ADD/DEL}MULTI]");
532 close(s);
533 return -1;
534 }
535 close(s);
536 return 0;
537}
538
539
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540static void * wpa_driver_wired_init(void *ctx, const char *ifname)
541{
542 struct wpa_driver_wired_data *drv;
543 int flags;
544
545 drv = os_zalloc(sizeof(*drv));
546 if (drv == NULL)
547 return NULL;
548 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
549 drv->ctx = ctx;
550
551#ifdef __linux__
552 drv->pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
553 if (drv->pf_sock < 0)
554 perror("socket(PF_PACKET)");
555#else /* __linux__ */
4781064b 556 drv->pf_sock = -1;
a875087d 557#endif /* __linux__ */
4781064b 558
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559 if (wpa_driver_wired_get_ifflags(ifname, &flags) == 0 &&
560 !(flags & IFF_UP) &&
561 wpa_driver_wired_set_ifflags(ifname, flags | IFF_UP) == 0) {
562 drv->iff_up = 1;
563 }
564
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565 if (wired_multicast_membership(drv->pf_sock,
566 if_nametoindex(drv->ifname),
567 pae_group_addr, 1) == 0) {
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568 wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
569 "packet socket", __func__);
570 drv->membership = 1;
571 } else if (wpa_driver_wired_multi(ifname, pae_group_addr, 1) == 0) {
572 wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
573 "SIOCADDMULTI", __func__);
574 drv->multi = 1;
575 } else if (wpa_driver_wired_get_ifflags(ifname, &flags) < 0) {
576 wpa_printf(MSG_INFO, "%s: Could not get interface "
577 "flags", __func__);
578 os_free(drv);
579 return NULL;
580 } else if (flags & IFF_ALLMULTI) {
581 wpa_printf(MSG_DEBUG, "%s: Interface is already configured "
582 "for multicast", __func__);
583 } else if (wpa_driver_wired_set_ifflags(ifname,
584 flags | IFF_ALLMULTI) < 0) {
585 wpa_printf(MSG_INFO, "%s: Failed to enable allmulti",
586 __func__);
587 os_free(drv);
588 return NULL;
589 } else {
590 wpa_printf(MSG_DEBUG, "%s: Enabled allmulti mode",
591 __func__);
592 drv->iff_allmulti = 1;
593 }
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594#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
595 {
596 int status;
597 wpa_printf(MSG_DEBUG, "%s: waiting for link to become active",
598 __func__);
599 while (wpa_driver_wired_get_ifstatus(ifname, &status) == 0 &&
600 status == 0)
601 sleep(1);
602 }
603#endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(FreeBSD_kernel__) */
a875087d
JL
604
605 return drv;
606}
607
608
609static void wpa_driver_wired_deinit(void *priv)
610{
611 struct wpa_driver_wired_data *drv = priv;
612 int flags;
613
614 if (drv->membership &&
4781064b
JM
615 wired_multicast_membership(drv->pf_sock,
616 if_nametoindex(drv->ifname),
617 pae_group_addr, 0) < 0) {
a875087d
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618 wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
619 "group (PACKET)", __func__);
620 }
621
622 if (drv->multi &&
623 wpa_driver_wired_multi(drv->ifname, pae_group_addr, 0) < 0) {
624 wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
625 "group (SIOCDELMULTI)", __func__);
626 }
627
628 if (drv->iff_allmulti &&
629 (wpa_driver_wired_get_ifflags(drv->ifname, &flags) < 0 ||
630 wpa_driver_wired_set_ifflags(drv->ifname,
631 flags & ~IFF_ALLMULTI) < 0)) {
632 wpa_printf(MSG_DEBUG, "%s: Failed to disable allmulti mode",
633 __func__);
634 }
635
636 if (drv->iff_up &&
637 wpa_driver_wired_get_ifflags(drv->ifname, &flags) == 0 &&
638 (flags & IFF_UP) &&
639 wpa_driver_wired_set_ifflags(drv->ifname, flags & ~IFF_UP) < 0) {
640 wpa_printf(MSG_DEBUG, "%s: Failed to set the interface down",
641 __func__);
642 }
643
644 if (drv->pf_sock != -1)
645 close(drv->pf_sock);
4781064b 646
a875087d
JL
647 os_free(drv);
648}
649
650
651const struct wpa_driver_ops wpa_driver_wired_ops = {
652 .name = "wired",
4781064b
JM
653 .desc = "Wired Ethernet driver",
654 .hapd_init = wired_driver_hapd_init,
655 .hapd_deinit = wired_driver_hapd_deinit,
656 .hapd_send_eapol = wired_send_eapol,
a875087d
JL
657 .get_ssid = wpa_driver_wired_get_ssid,
658 .get_bssid = wpa_driver_wired_get_bssid,
4781064b 659 .get_capa = wpa_driver_wired_get_capa,
a875087d
JL
660 .init = wpa_driver_wired_init,
661 .deinit = wpa_driver_wired_deinit,
662};