2 * Wired Ethernet driver interface
3 * Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2004, Gunter Burchardt <tira@isx.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Alternatively, this software may be distributed under the terms of BSD
13 * See README and COPYING for more details.
17 #include <sys/ioctl.h>
20 #include <netpacket/packet.h>
21 #include <net/if_arp.h>
23 #endif /* __linux__ */
24 #if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
25 #include <net/if_dl.h>
26 #endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__) */
46 static const u8 pae_group_addr[ETH_ALEN] =
47 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
50 struct wpa_driver_wired_data {
51 char ifname[IFNAMSIZ + 1];
54 int sock; /* raw packet socket for driver access */
55 int dhcp_sock; /* socket for dhcp packets */
56 int use_pae_group_addr;
59 int membership, multi, iff_allmulti, iff_up;
63 /* TODO: detecting new devices should eventually be changed from using DHCP
64 * snooping to trigger on any packet from a new layer 2 MAC address, e.g.,
65 * based on ebtables, etc. */
83 u_int8_t options[308]; /* 312 - cookie */
87 static int wired_multicast_membership(int sock, int ifindex,
88 const u8 *addr, int add)
91 struct packet_mreq mreq;
96 os_memset(&mreq, 0, sizeof(mreq));
97 mreq.mr_ifindex = ifindex;
98 mreq.mr_type = PACKET_MR_MULTICAST;
99 mreq.mr_alen = ETH_ALEN;
100 os_memcpy(mreq.mr_address, addr, ETH_ALEN);
102 if (setsockopt(sock, SOL_PACKET,
103 add ? PACKET_ADD_MEMBERSHIP : PACKET_DROP_MEMBERSHIP,
104 &mreq, sizeof(mreq)) < 0) {
105 perror("setsockopt");
109 #else /* __linux__ */
111 #endif /* __linux__ */
116 static void handle_data(void *ctx, unsigned char *buf, size_t len)
119 struct ieee8023_hdr *hdr;
122 union wpa_event_data event;
124 /* must contain at least ieee8023_hdr 6 byte source, 6 byte dest,
125 * 2 byte ethertype */
127 wpa_printf(MSG_MSGDUMP, "handle_data: too short (%lu)",
128 (unsigned long) len);
132 hdr = (struct ieee8023_hdr *) buf;
134 switch (ntohs(hdr->ethertype)) {
136 wpa_printf(MSG_MSGDUMP, "Received EAPOL packet");
138 os_memset(&event, 0, sizeof(event));
139 event.new_sta.addr = sa;
140 wpa_supplicant_event(ctx, EVENT_NEW_STA, &event);
142 pos = (u8 *) (hdr + 1);
143 left = len - sizeof(*hdr);
144 drv_event_eapol_rx(ctx, sa, pos, left);
148 wpa_printf(MSG_DEBUG, "Unknown ethertype 0x%04x in data frame",
149 ntohs(hdr->ethertype));
156 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
159 unsigned char buf[3000];
161 len = recv(sock, buf, sizeof(buf), 0);
167 handle_data(eloop_ctx, buf, len);
171 static void handle_dhcp(int sock, void *eloop_ctx, void *sock_ctx)
174 unsigned char buf[3000];
175 struct dhcp_message *msg;
177 union wpa_event_data event;
179 len = recv(sock, buf, sizeof(buf), 0);
185 /* must contain at least dhcp_message->chaddr */
187 wpa_printf(MSG_MSGDUMP, "handle_dhcp: too short (%d)", len);
191 msg = (struct dhcp_message *) buf;
192 mac_address = (u8 *) &(msg->chaddr);
194 wpa_printf(MSG_MSGDUMP, "Got DHCP broadcast packet from " MACSTR,
195 MAC2STR(mac_address));
197 os_memset(&event, 0, sizeof(event));
198 event.new_sta.addr = mac_address;
199 wpa_supplicant_event(eloop_ctx, EVENT_NEW_STA, &event);
201 #endif /* __linux__ */
204 static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
208 struct sockaddr_ll addr;
209 struct sockaddr_in addr2;
212 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
214 perror("socket[PF_PACKET,SOCK_RAW]");
218 if (eloop_register_read_sock(drv->sock, handle_read, drv->ctx, NULL)) {
219 printf("Could not register read socket\n");
223 os_memset(&ifr, 0, sizeof(ifr));
224 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
225 if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
226 perror("ioctl(SIOCGIFINDEX)");
230 os_memset(&addr, 0, sizeof(addr));
231 addr.sll_family = AF_PACKET;
232 addr.sll_ifindex = ifr.ifr_ifindex;
233 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
236 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
241 /* filter multicast address */
242 if (wired_multicast_membership(drv->sock, ifr.ifr_ifindex,
243 pae_group_addr, 1) < 0) {
244 wpa_printf(MSG_ERROR, "wired: Failed to add multicast group "
249 os_memset(&ifr, 0, sizeof(ifr));
250 os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
251 if (ioctl(drv->sock, SIOCGIFHWADDR, &ifr) != 0) {
252 perror("ioctl(SIOCGIFHWADDR)");
256 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
257 printf("Invalid HW-addr family 0x%04x\n",
258 ifr.ifr_hwaddr.sa_family);
261 os_memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
263 /* setup dhcp listen socket for sta detection */
264 if ((drv->dhcp_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
265 perror("socket call failed for dhcp");
269 if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp, drv->ctx,
271 printf("Could not register read socket\n");
275 os_memset(&addr2, 0, sizeof(addr2));
276 addr2.sin_family = AF_INET;
277 addr2.sin_port = htons(67);
278 addr2.sin_addr.s_addr = INADDR_ANY;
280 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_REUSEADDR, (char *) &n,
282 perror("setsockopt[SOL_SOCKET,SO_REUSEADDR]");
285 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BROADCAST, (char *) &n,
287 perror("setsockopt[SOL_SOCKET,SO_BROADCAST]");
291 os_memset(&ifr, 0, sizeof(ifr));
292 os_strlcpy(ifr.ifr_ifrn.ifrn_name, drv->ifname, IFNAMSIZ);
293 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BINDTODEVICE,
294 (char *) &ifr, sizeof(ifr)) < 0) {
295 perror("setsockopt[SOL_SOCKET,SO_BINDTODEVICE]");
299 if (bind(drv->dhcp_sock, (struct sockaddr *) &addr2,
300 sizeof(struct sockaddr)) == -1) {
306 #else /* __linux__ */
308 #endif /* __linux__ */
312 static int wired_send_eapol(void *priv, const u8 *addr,
313 const u8 *data, size_t data_len, int encrypt,
316 struct wpa_driver_wired_data *drv = priv;
317 struct ieee8023_hdr *hdr;
322 len = sizeof(*hdr) + data_len;
323 hdr = os_zalloc(len);
325 printf("malloc() failed for wired_send_eapol(len=%lu)\n",
326 (unsigned long) len);
330 os_memcpy(hdr->dest, drv->use_pae_group_addr ? pae_group_addr : addr,
332 os_memcpy(hdr->src, own_addr, ETH_ALEN);
333 hdr->ethertype = htons(ETH_P_PAE);
335 pos = (u8 *) (hdr + 1);
336 os_memcpy(pos, data, data_len);
338 res = send(drv->sock, (u8 *) hdr, len, 0);
342 perror("wired_send_eapol: send");
343 printf("wired_send_eapol - packet len: %lu - failed\n",
344 (unsigned long) len);
351 static void * wired_driver_hapd_init(struct hostapd_data *hapd,
352 struct wpa_init_params *params)
354 struct wpa_driver_wired_data *drv;
356 drv = os_zalloc(sizeof(struct wpa_driver_wired_data));
358 printf("Could not allocate memory for wired driver data\n");
363 os_strlcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
364 drv->use_pae_group_addr = params->use_pae_group_addr;
366 if (wired_init_sockets(drv, params->own_addr)) {
375 static void wired_driver_hapd_deinit(void *priv)
377 struct wpa_driver_wired_data *drv = priv;
382 if (drv->dhcp_sock >= 0)
383 close(drv->dhcp_sock);
389 static int wpa_driver_wired_get_ssid(void *priv, u8 *ssid)
396 static int wpa_driver_wired_get_bssid(void *priv, u8 *bssid)
398 /* Report PAE group address as the "BSSID" for wired connection. */
399 os_memcpy(bssid, pae_group_addr, ETH_ALEN);
404 static int wpa_driver_wired_get_capa(void *priv, struct wpa_driver_capa *capa)
406 os_memset(capa, 0, sizeof(*capa));
407 capa->flags = WPA_DRIVER_FLAGS_WIRED;
412 static int wpa_driver_wired_get_ifflags(const char *ifname, int *flags)
417 s = socket(PF_INET, SOCK_DGRAM, 0);
423 os_memset(&ifr, 0, sizeof(ifr));
424 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
425 if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
426 perror("ioctl[SIOCGIFFLAGS]");
431 *flags = ifr.ifr_flags & 0xffff;
436 static int wpa_driver_wired_set_ifflags(const char *ifname, int flags)
441 s = socket(PF_INET, SOCK_DGRAM, 0);
447 os_memset(&ifr, 0, sizeof(ifr));
448 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
449 ifr.ifr_flags = flags & 0xffff;
450 if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
451 perror("ioctl[SIOCSIFFLAGS]");
460 static int wpa_driver_wired_multi(const char *ifname, const u8 *addr, int add)
465 s = socket(PF_INET, SOCK_DGRAM, 0);
471 os_memset(&ifr, 0, sizeof(ifr));
472 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
474 ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
475 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
476 #endif /* __linux__ */
477 #if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
479 struct sockaddr_dl *dlp;
480 dlp = (struct sockaddr_dl *) &ifr.ifr_addr;
481 dlp->sdl_len = sizeof(struct sockaddr_dl);
482 dlp->sdl_family = AF_LINK;
485 dlp->sdl_alen = ETH_ALEN;
487 os_memcpy(LLADDR(dlp), addr, ETH_ALEN);
489 #endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(FreeBSD_kernel__) */
490 #if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
492 struct sockaddr *sap;
493 sap = (struct sockaddr *) &ifr.ifr_addr;
494 sap->sa_len = sizeof(struct sockaddr);
495 sap->sa_family = AF_UNSPEC;
496 os_memcpy(sap->sa_data, addr, ETH_ALEN);
498 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__) */
500 if (ioctl(s, add ? SIOCADDMULTI : SIOCDELMULTI, (caddr_t) &ifr) < 0) {
501 perror("ioctl[SIOC{ADD/DEL}MULTI]");
510 static void * wpa_driver_wired_init(void *ctx, const char *ifname)
512 struct wpa_driver_wired_data *drv;
515 drv = os_zalloc(sizeof(*drv));
518 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
522 drv->pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
523 if (drv->pf_sock < 0)
524 perror("socket(PF_PACKET)");
525 #else /* __linux__ */
527 #endif /* __linux__ */
529 if (wpa_driver_wired_get_ifflags(ifname, &flags) == 0 &&
531 wpa_driver_wired_set_ifflags(ifname, flags | IFF_UP) == 0) {
535 if (wired_multicast_membership(drv->pf_sock,
536 if_nametoindex(drv->ifname),
537 pae_group_addr, 1) == 0) {
538 wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
539 "packet socket", __func__);
541 } else if (wpa_driver_wired_multi(ifname, pae_group_addr, 1) == 0) {
542 wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
543 "SIOCADDMULTI", __func__);
545 } else if (wpa_driver_wired_get_ifflags(ifname, &flags) < 0) {
546 wpa_printf(MSG_INFO, "%s: Could not get interface "
550 } else if (flags & IFF_ALLMULTI) {
551 wpa_printf(MSG_DEBUG, "%s: Interface is already configured "
552 "for multicast", __func__);
553 } else if (wpa_driver_wired_set_ifflags(ifname,
554 flags | IFF_ALLMULTI) < 0) {
555 wpa_printf(MSG_INFO, "%s: Failed to enable allmulti",
560 wpa_printf(MSG_DEBUG, "%s: Enabled allmulti mode",
562 drv->iff_allmulti = 1;
569 static void wpa_driver_wired_deinit(void *priv)
571 struct wpa_driver_wired_data *drv = priv;
574 if (drv->membership &&
575 wired_multicast_membership(drv->pf_sock,
576 if_nametoindex(drv->ifname),
577 pae_group_addr, 0) < 0) {
578 wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
579 "group (PACKET)", __func__);
583 wpa_driver_wired_multi(drv->ifname, pae_group_addr, 0) < 0) {
584 wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
585 "group (SIOCDELMULTI)", __func__);
588 if (drv->iff_allmulti &&
589 (wpa_driver_wired_get_ifflags(drv->ifname, &flags) < 0 ||
590 wpa_driver_wired_set_ifflags(drv->ifname,
591 flags & ~IFF_ALLMULTI) < 0)) {
592 wpa_printf(MSG_DEBUG, "%s: Failed to disable allmulti mode",
597 wpa_driver_wired_get_ifflags(drv->ifname, &flags) == 0 &&
599 wpa_driver_wired_set_ifflags(drv->ifname, flags & ~IFF_UP) < 0) {
600 wpa_printf(MSG_DEBUG, "%s: Failed to set the interface down",
604 if (drv->pf_sock != -1)
611 const struct wpa_driver_ops wpa_driver_wired_ops = {
613 .desc = "Wired Ethernet driver",
614 .hapd_init = wired_driver_hapd_init,
615 .hapd_deinit = wired_driver_hapd_deinit,
616 .hapd_send_eapol = wired_send_eapol,
617 .get_ssid = wpa_driver_wired_get_ssid,
618 .get_bssid = wpa_driver_wired_get_bssid,
619 .get_capa = wpa_driver_wired_get_capa,
620 .init = wpa_driver_wired_init,
621 .deinit = wpa_driver_wired_deinit,