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 software may be distributed under the terms of the BSD license.
7 * See README for more details.
11 #include <sys/ioctl.h>
14 #include <netpacket/packet.h>
15 #include <net/if_arp.h>
17 #endif /* __linux__ */
18 #if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
19 #include <net/if_dl.h>
20 #include <net/if_media.h>
21 #endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__) */
23 #include <sys/sockio.h>
44 static const u8 pae_group_addr[ETH_ALEN] =
45 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
48 struct wpa_driver_wired_data {
49 char ifname[IFNAMSIZ + 1];
52 int sock; /* raw packet socket for driver access */
53 int dhcp_sock; /* socket for dhcp packets */
54 int use_pae_group_addr;
57 int membership, multi, iff_allmulti, iff_up;
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. */
81 u_int8_t options[308]; /* 312 - cookie */
85 static int wired_multicast_membership(int sock, int ifindex,
86 const u8 *addr, int add)
89 struct packet_mreq mreq;
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);
100 if (setsockopt(sock, SOL_PACKET,
101 add ? PACKET_ADD_MEMBERSHIP : PACKET_DROP_MEMBERSHIP,
102 &mreq, sizeof(mreq)) < 0) {
103 perror("setsockopt");
107 #else /* __linux__ */
109 #endif /* __linux__ */
114 static void handle_data(void *ctx, unsigned char *buf, size_t len)
117 struct ieee8023_hdr *hdr;
120 union wpa_event_data event;
122 /* must contain at least ieee8023_hdr 6 byte source, 6 byte dest,
123 * 2 byte ethertype */
125 wpa_printf(MSG_MSGDUMP, "handle_data: too short (%lu)",
126 (unsigned long) len);
130 hdr = (struct ieee8023_hdr *) buf;
132 switch (ntohs(hdr->ethertype)) {
134 wpa_printf(MSG_MSGDUMP, "Received EAPOL packet");
136 os_memset(&event, 0, sizeof(event));
137 event.new_sta.addr = sa;
138 wpa_supplicant_event(ctx, EVENT_NEW_STA, &event);
140 pos = (u8 *) (hdr + 1);
141 left = len - sizeof(*hdr);
142 drv_event_eapol_rx(ctx, sa, pos, left);
146 wpa_printf(MSG_DEBUG, "Unknown ethertype 0x%04x in data frame",
147 ntohs(hdr->ethertype));
154 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
157 unsigned char buf[3000];
159 len = recv(sock, buf, sizeof(buf), 0);
165 handle_data(eloop_ctx, buf, len);
169 static void handle_dhcp(int sock, void *eloop_ctx, void *sock_ctx)
172 unsigned char buf[3000];
173 struct dhcp_message *msg;
175 union wpa_event_data event;
177 len = recv(sock, buf, sizeof(buf), 0);
183 /* must contain at least dhcp_message->chaddr */
185 wpa_printf(MSG_MSGDUMP, "handle_dhcp: too short (%d)", len);
189 msg = (struct dhcp_message *) buf;
190 mac_address = (u8 *) &(msg->chaddr);
192 wpa_printf(MSG_MSGDUMP, "Got DHCP broadcast packet from " MACSTR,
193 MAC2STR(mac_address));
195 os_memset(&event, 0, sizeof(event));
196 event.new_sta.addr = mac_address;
197 wpa_supplicant_event(eloop_ctx, EVENT_NEW_STA, &event);
199 #endif /* __linux__ */
202 static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
206 struct sockaddr_ll addr;
207 struct sockaddr_in addr2;
210 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
212 perror("socket[PF_PACKET,SOCK_RAW]");
216 if (eloop_register_read_sock(drv->sock, handle_read, drv->ctx, NULL)) {
217 printf("Could not register read socket\n");
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)");
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",
234 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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 "
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)");
254 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
255 printf("Invalid HW-addr family 0x%04x\n",
256 ifr.ifr_hwaddr.sa_family);
259 os_memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
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");
267 if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp, drv->ctx,
269 printf("Could not register read socket\n");
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;
278 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_REUSEADDR, (char *) &n,
280 perror("setsockopt[SOL_SOCKET,SO_REUSEADDR]");
283 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BROADCAST, (char *) &n,
285 perror("setsockopt[SOL_SOCKET,SO_BROADCAST]");
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]");
297 if (bind(drv->dhcp_sock, (struct sockaddr *) &addr2,
298 sizeof(struct sockaddr)) == -1) {
304 #else /* __linux__ */
306 #endif /* __linux__ */
310 static 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)
314 struct wpa_driver_wired_data *drv = priv;
315 struct ieee8023_hdr *hdr;
320 len = sizeof(*hdr) + data_len;
321 hdr = os_zalloc(len);
323 printf("malloc() failed for wired_send_eapol(len=%lu)\n",
324 (unsigned long) len);
328 os_memcpy(hdr->dest, drv->use_pae_group_addr ? pae_group_addr : addr,
330 os_memcpy(hdr->src, own_addr, ETH_ALEN);
331 hdr->ethertype = htons(ETH_P_PAE);
333 pos = (u8 *) (hdr + 1);
334 os_memcpy(pos, data, data_len);
336 res = send(drv->sock, (u8 *) hdr, len, 0);
340 perror("wired_send_eapol: send");
341 printf("wired_send_eapol - packet len: %lu - failed\n",
342 (unsigned long) len);
349 static void * wired_driver_hapd_init(struct hostapd_data *hapd,
350 struct wpa_init_params *params)
352 struct wpa_driver_wired_data *drv;
354 drv = os_zalloc(sizeof(struct wpa_driver_wired_data));
356 printf("Could not allocate memory for wired driver data\n");
361 os_strlcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
362 drv->use_pae_group_addr = params->use_pae_group_addr;
364 if (wired_init_sockets(drv, params->own_addr)) {
373 static void wired_driver_hapd_deinit(void *priv)
375 struct wpa_driver_wired_data *drv = priv;
380 if (drv->dhcp_sock >= 0)
381 close(drv->dhcp_sock);
387 static int wpa_driver_wired_get_ssid(void *priv, u8 *ssid)
394 static int wpa_driver_wired_get_bssid(void *priv, u8 *bssid)
396 /* Report PAE group address as the "BSSID" for wired connection. */
397 os_memcpy(bssid, pae_group_addr, ETH_ALEN);
402 static int wpa_driver_wired_get_capa(void *priv, struct wpa_driver_capa *capa)
404 os_memset(capa, 0, sizeof(*capa));
405 capa->flags = WPA_DRIVER_FLAGS_WIRED;
410 static int wpa_driver_wired_get_ifflags(const char *ifname, int *flags)
415 s = socket(PF_INET, SOCK_DGRAM, 0);
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]");
429 *flags = ifr.ifr_flags & 0xffff;
434 static int wpa_driver_wired_set_ifflags(const char *ifname, int flags)
439 s = socket(PF_INET, SOCK_DGRAM, 0);
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]");
457 static int wpa_driver_wired_get_ifstatus(const char *ifname, int *status)
459 struct ifmediareq ifmr;
462 s = socket(PF_INET, SOCK_DGRAM, 0);
468 os_memset(&ifmr, 0, sizeof(ifmr));
469 os_strlcpy(ifmr.ifm_name, ifname, IFNAMSIZ);
470 if (ioctl(s, SIOCGIFMEDIA, (caddr_t) &ifmr) < 0) {
471 perror("ioctl[SIOCGIFMEDIA]");
476 *status = (ifmr.ifm_status & (IFM_ACTIVE|IFM_AVALID)) ==
477 (IFM_ACTIVE|IFM_AVALID);
482 static int wpa_driver_wired_multi(const char *ifname, const u8 *addr, int add)
491 s = socket(PF_INET, SOCK_DGRAM, 0);
497 os_memset(&ifr, 0, sizeof(ifr));
498 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
500 ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
501 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
502 #endif /* __linux__ */
503 #if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
505 struct sockaddr_dl *dlp;
506 dlp = (struct sockaddr_dl *) &ifr.ifr_addr;
507 dlp->sdl_len = sizeof(struct sockaddr_dl);
508 dlp->sdl_family = AF_LINK;
511 dlp->sdl_alen = ETH_ALEN;
513 os_memcpy(LLADDR(dlp), addr, ETH_ALEN);
515 #endif /* defined(__FreeBSD__) || defined(__DragonFly__) || defined(FreeBSD_kernel__) */
516 #if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
518 struct sockaddr *sap;
519 sap = (struct sockaddr *) &ifr.ifr_addr;
520 sap->sa_len = sizeof(struct sockaddr);
521 sap->sa_family = AF_UNSPEC;
522 os_memcpy(sap->sa_data, addr, ETH_ALEN);
524 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__) */
526 if (ioctl(s, add ? SIOCADDMULTI : SIOCDELMULTI, (caddr_t) &ifr) < 0) {
527 perror("ioctl[SIOC{ADD/DEL}MULTI]");
536 static void * wpa_driver_wired_init(void *ctx, const char *ifname)
538 struct wpa_driver_wired_data *drv;
541 drv = os_zalloc(sizeof(*drv));
544 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
548 drv->pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
549 if (drv->pf_sock < 0)
550 perror("socket(PF_PACKET)");
551 #else /* __linux__ */
553 #endif /* __linux__ */
555 if (wpa_driver_wired_get_ifflags(ifname, &flags) == 0 &&
557 wpa_driver_wired_set_ifflags(ifname, flags | IFF_UP) == 0) {
561 if (wired_multicast_membership(drv->pf_sock,
562 if_nametoindex(drv->ifname),
563 pae_group_addr, 1) == 0) {
564 wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
565 "packet socket", __func__);
567 } else if (wpa_driver_wired_multi(ifname, pae_group_addr, 1) == 0) {
568 wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
569 "SIOCADDMULTI", __func__);
571 } else if (wpa_driver_wired_get_ifflags(ifname, &flags) < 0) {
572 wpa_printf(MSG_INFO, "%s: Could not get interface "
576 } else if (flags & IFF_ALLMULTI) {
577 wpa_printf(MSG_DEBUG, "%s: Interface is already configured "
578 "for multicast", __func__);
579 } else if (wpa_driver_wired_set_ifflags(ifname,
580 flags | IFF_ALLMULTI) < 0) {
581 wpa_printf(MSG_INFO, "%s: Failed to enable allmulti",
586 wpa_printf(MSG_DEBUG, "%s: Enabled allmulti mode",
588 drv->iff_allmulti = 1;
590 wpa_printf(MSG_DEBUG, "%s: waiting for link to become active",
592 while (wpa_driver_wired_get_ifstatus(ifname, &status) == 0 &&
600 static void wpa_driver_wired_deinit(void *priv)
602 struct wpa_driver_wired_data *drv = priv;
605 if (drv->membership &&
606 wired_multicast_membership(drv->pf_sock,
607 if_nametoindex(drv->ifname),
608 pae_group_addr, 0) < 0) {
609 wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
610 "group (PACKET)", __func__);
614 wpa_driver_wired_multi(drv->ifname, pae_group_addr, 0) < 0) {
615 wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
616 "group (SIOCDELMULTI)", __func__);
619 if (drv->iff_allmulti &&
620 (wpa_driver_wired_get_ifflags(drv->ifname, &flags) < 0 ||
621 wpa_driver_wired_set_ifflags(drv->ifname,
622 flags & ~IFF_ALLMULTI) < 0)) {
623 wpa_printf(MSG_DEBUG, "%s: Failed to disable allmulti mode",
628 wpa_driver_wired_get_ifflags(drv->ifname, &flags) == 0 &&
630 wpa_driver_wired_set_ifflags(drv->ifname, flags & ~IFF_UP) < 0) {
631 wpa_printf(MSG_DEBUG, "%s: Failed to set the interface down",
635 if (drv->pf_sock != -1)
642 const struct wpa_driver_ops wpa_driver_wired_ops = {
644 .desc = "Wired Ethernet driver",
645 .hapd_init = wired_driver_hapd_init,
646 .hapd_deinit = wired_driver_hapd_deinit,
647 .hapd_send_eapol = wired_send_eapol,
648 .get_ssid = wpa_driver_wired_get_ssid,
649 .get_bssid = wpa_driver_wired_get_bssid,
650 .get_capa = wpa_driver_wired_get_capa,
651 .init = wpa_driver_wired_init,
652 .deinit = wpa_driver_wired_deinit,