2 * WPA Supplicant - wired Ethernet driver interface
3 * Copyright (c) 2005-2007, 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__ */
25 #include <net/if_dl.h>
26 #endif /* __FreeBSD__ */
33 #include "../../hostapd/hostapd_defs.h"
34 #include "../../hostapd/sta_info.h"
37 static const u8 pae_group_addr[ETH_ALEN] =
38 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
41 struct wpa_driver_wired_data {
43 struct hostapd_data *hapd;
44 char iface[IFNAMSIZ + 1];
46 int sock; /* raw packet socket for driver access */
47 int dhcp_sock; /* socket for dhcp packets */
48 int use_pae_group_addr;
52 char ifname[IFNAMSIZ + 1];
53 int membership, multi, iff_allmulti, iff_up;
60 /* TODO: detecting new devices should eventually be changed from using DHCP
61 * snooping to trigger on any packet from a new layer 2 MAC address, e.g.,
62 * based on ebtables, etc. */
80 u_int8_t options[308]; /* 312 - cookie */
84 static void wired_possible_new_sta(struct hostapd_data *hapd, u8 *addr)
88 sta = ap_get_sta(hapd, addr);
92 wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
93 " - adding a new STA", MAC2STR(addr));
94 sta = ap_sta_add(hapd, addr);
96 hostapd_new_assoc_sta(hapd, sta, 0);
98 wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
104 static void handle_data(struct hostapd_data *hapd, unsigned char *buf,
107 struct ieee8023_hdr *hdr;
111 /* must contain at least ieee8023_hdr 6 byte source, 6 byte dest,
112 * 2 byte ethertype */
114 wpa_printf(MSG_MSGDUMP, "handle_data: too short (%lu)",
115 (unsigned long) len);
119 hdr = (struct ieee8023_hdr *) buf;
121 switch (ntohs(hdr->ethertype)) {
123 wpa_printf(MSG_MSGDUMP, "Received EAPOL packet");
125 wired_possible_new_sta(hapd, sa);
127 pos = (u8 *) (hdr + 1);
128 left = len - sizeof(*hdr);
130 hostapd_eapol_receive(hapd, sa, pos, left);
134 wpa_printf(MSG_DEBUG, "Unknown ethertype 0x%04x in data frame",
135 ntohs(hdr->ethertype));
141 static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
143 struct hostapd_data *hapd = (struct hostapd_data *) eloop_ctx;
145 unsigned char buf[3000];
147 len = recv(sock, buf, sizeof(buf), 0);
153 handle_data(hapd, buf, len);
157 static void handle_dhcp(int sock, void *eloop_ctx, void *sock_ctx)
159 struct hostapd_data *hapd = (struct hostapd_data *) eloop_ctx;
161 unsigned char buf[3000];
162 struct dhcp_message *msg;
165 len = recv(sock, buf, sizeof(buf), 0);
171 /* must contain at least dhcp_message->chaddr */
173 wpa_printf(MSG_MSGDUMP, "handle_dhcp: too short (%d)", len);
177 msg = (struct dhcp_message *) buf;
178 mac_address = (u8 *) &(msg->chaddr);
180 wpa_printf(MSG_MSGDUMP, "Got DHCP broadcast packet from " MACSTR,
181 MAC2STR(mac_address));
183 wired_possible_new_sta(hapd, mac_address);
187 static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
189 struct hostapd_data *hapd = drv->hapd;
191 struct sockaddr_ll addr;
192 struct sockaddr_in addr2;
193 struct packet_mreq mreq;
196 drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
198 perror("socket[PF_PACKET,SOCK_RAW]");
202 if (eloop_register_read_sock(drv->sock, handle_read, hapd, NULL)) {
203 printf("Could not register read socket\n");
207 memset(&ifr, 0, sizeof(ifr));
208 os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
209 if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
210 perror("ioctl(SIOCGIFINDEX)");
214 memset(&addr, 0, sizeof(addr));
215 addr.sll_family = AF_PACKET;
216 addr.sll_ifindex = ifr.ifr_ifindex;
217 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
220 if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
225 /* filter multicast address */
226 memset(&mreq, 0, sizeof(mreq));
227 mreq.mr_ifindex = ifr.ifr_ifindex;
228 mreq.mr_type = PACKET_MR_MULTICAST;
230 memcpy(mreq.mr_address, pae_group_addr, mreq.mr_alen);
232 if (setsockopt(drv->sock, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mreq,
234 perror("setsockopt[SOL_SOCKET,PACKET_ADD_MEMBERSHIP]");
238 memset(&ifr, 0, sizeof(ifr));
239 os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
240 if (ioctl(drv->sock, SIOCGIFHWADDR, &ifr) != 0) {
241 perror("ioctl(SIOCGIFHWADDR)");
245 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
246 printf("Invalid HW-addr family 0x%04x\n",
247 ifr.ifr_hwaddr.sa_family);
250 memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
252 /* setup dhcp listen socket for sta detection */
253 if ((drv->dhcp_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
254 perror("socket call failed for dhcp");
258 if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp, hapd, NULL))
260 printf("Could not register read socket\n");
264 memset(&addr2, 0, sizeof(addr2));
265 addr2.sin_family = AF_INET;
266 addr2.sin_port = htons(67);
267 addr2.sin_addr.s_addr = INADDR_ANY;
269 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_REUSEADDR, (char *) &n,
271 perror("setsockopt[SOL_SOCKET,SO_REUSEADDR]");
274 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BROADCAST, (char *) &n,
276 perror("setsockopt[SOL_SOCKET,SO_BROADCAST]");
280 memset(&ifr, 0, sizeof(ifr));
281 os_strlcpy(ifr.ifr_ifrn.ifrn_name, drv->iface, IFNAMSIZ);
282 if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BINDTODEVICE,
283 (char *) &ifr, sizeof(ifr)) < 0) {
284 perror("setsockopt[SOL_SOCKET,SO_BINDTODEVICE]");
288 if (bind(drv->dhcp_sock, (struct sockaddr *) &addr2,
289 sizeof(struct sockaddr)) == -1) {
298 static int wired_send_eapol(void *priv, const u8 *addr,
299 const u8 *data, size_t data_len, int encrypt,
302 struct wpa_driver_wired_data *drv = priv;
303 struct ieee8023_hdr *hdr;
308 len = sizeof(*hdr) + data_len;
309 hdr = os_zalloc(len);
311 printf("malloc() failed for wired_send_eapol(len=%lu)\n",
312 (unsigned long) len);
316 memcpy(hdr->dest, drv->use_pae_group_addr ? pae_group_addr : addr,
318 memcpy(hdr->src, own_addr, ETH_ALEN);
319 hdr->ethertype = htons(ETH_P_PAE);
321 pos = (u8 *) (hdr + 1);
322 memcpy(pos, data, data_len);
324 res = send(drv->sock, (u8 *) hdr, len, 0);
328 perror("wired_send_eapol: send");
329 printf("wired_send_eapol - packet len: %lu - failed\n",
330 (unsigned long) len);
337 static void * wired_driver_hapd_init(struct hostapd_data *hapd,
338 struct wpa_init_params *params)
340 struct wpa_driver_wired_data *drv;
342 drv = os_zalloc(sizeof(struct wpa_driver_wired_data));
344 printf("Could not allocate memory for wired driver data\n");
349 os_strlcpy(drv->iface, params->ifname, sizeof(drv->iface));
350 drv->use_pae_group_addr = params->use_pae_group_addr;
352 if (wired_init_sockets(drv, params->own_addr)) {
361 static void wired_driver_hapd_deinit(void *priv)
363 struct wpa_driver_wired_data *drv = priv;
368 if (drv->dhcp_sock >= 0)
369 close(drv->dhcp_sock);
376 static int wpa_driver_wired_get_ssid(void *priv, u8 *ssid)
383 static int wpa_driver_wired_get_bssid(void *priv, u8 *bssid)
385 /* Report PAE group address as the "BSSID" for wired connection. */
386 os_memcpy(bssid, pae_group_addr, ETH_ALEN);
391 static int wpa_driver_wired_get_capa(void *priv, struct wpa_driver_capa *capa)
393 os_memset(capa, 0, sizeof(*capa));
394 capa->flags = WPA_DRIVER_FLAGS_WIRED;
399 static int wpa_driver_wired_get_ifflags(const char *ifname, int *flags)
404 s = socket(PF_INET, SOCK_DGRAM, 0);
410 os_memset(&ifr, 0, sizeof(ifr));
411 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
412 if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
413 perror("ioctl[SIOCGIFFLAGS]");
418 *flags = ifr.ifr_flags & 0xffff;
423 static int wpa_driver_wired_set_ifflags(const char *ifname, int flags)
428 s = socket(PF_INET, SOCK_DGRAM, 0);
434 os_memset(&ifr, 0, sizeof(ifr));
435 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
436 ifr.ifr_flags = flags & 0xffff;
437 if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
438 perror("ioctl[SIOCSIFFLAGS]");
447 static int wpa_driver_wired_multi(const char *ifname, const u8 *addr, int add)
452 s = socket(PF_INET, SOCK_DGRAM, 0);
458 os_memset(&ifr, 0, sizeof(ifr));
459 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
461 ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
462 os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
463 #endif /* __linux__ */
466 struct sockaddr_dl *dlp;
467 dlp = (struct sockaddr_dl *) &ifr.ifr_addr;
468 dlp->sdl_len = sizeof(struct sockaddr_dl);
469 dlp->sdl_family = AF_LINK;
472 dlp->sdl_alen = ETH_ALEN;
474 os_memcpy(LLADDR(dlp), addr, ETH_ALEN);
476 #endif /* __FreeBSD__ */
478 if (ioctl(s, add ? SIOCADDMULTI : SIOCDELMULTI, (caddr_t) &ifr) < 0) {
479 perror("ioctl[SIOC{ADD/DEL}MULTI]");
488 static int wpa_driver_wired_membership(struct wpa_driver_wired_data *drv,
489 const u8 *addr, int add)
492 struct packet_mreq mreq;
494 if (drv->pf_sock == -1)
497 os_memset(&mreq, 0, sizeof(mreq));
498 mreq.mr_ifindex = if_nametoindex(drv->ifname);
499 mreq.mr_type = PACKET_MR_MULTICAST;
500 mreq.mr_alen = ETH_ALEN;
501 os_memcpy(mreq.mr_address, addr, ETH_ALEN);
503 if (setsockopt(drv->pf_sock, SOL_PACKET,
504 add ? PACKET_ADD_MEMBERSHIP : PACKET_DROP_MEMBERSHIP,
505 &mreq, sizeof(mreq)) < 0) {
506 perror("setsockopt");
510 #else /* __linux__ */
512 #endif /* __linux__ */
516 static void * wpa_driver_wired_init(void *ctx, const char *ifname)
518 struct wpa_driver_wired_data *drv;
521 drv = os_zalloc(sizeof(*drv));
524 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
528 drv->pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
529 if (drv->pf_sock < 0)
530 perror("socket(PF_PACKET)");
531 #else /* __linux__ */
533 #endif /* __linux__ */
535 if (wpa_driver_wired_get_ifflags(ifname, &flags) == 0 &&
537 wpa_driver_wired_set_ifflags(ifname, flags | IFF_UP) == 0) {
541 if (wpa_driver_wired_membership(drv, pae_group_addr, 1) == 0) {
542 wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
543 "packet socket", __func__);
545 } else if (wpa_driver_wired_multi(ifname, pae_group_addr, 1) == 0) {
546 wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
547 "SIOCADDMULTI", __func__);
549 } else if (wpa_driver_wired_get_ifflags(ifname, &flags) < 0) {
550 wpa_printf(MSG_INFO, "%s: Could not get interface "
554 } else if (flags & IFF_ALLMULTI) {
555 wpa_printf(MSG_DEBUG, "%s: Interface is already configured "
556 "for multicast", __func__);
557 } else if (wpa_driver_wired_set_ifflags(ifname,
558 flags | IFF_ALLMULTI) < 0) {
559 wpa_printf(MSG_INFO, "%s: Failed to enable allmulti",
564 wpa_printf(MSG_DEBUG, "%s: Enabled allmulti mode",
566 drv->iff_allmulti = 1;
573 static void wpa_driver_wired_deinit(void *priv)
575 struct wpa_driver_wired_data *drv = priv;
578 if (drv->membership &&
579 wpa_driver_wired_membership(drv, pae_group_addr, 0) < 0) {
580 wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
581 "group (PACKET)", __func__);
585 wpa_driver_wired_multi(drv->ifname, pae_group_addr, 0) < 0) {
586 wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
587 "group (SIOCDELMULTI)", __func__);
590 if (drv->iff_allmulti &&
591 (wpa_driver_wired_get_ifflags(drv->ifname, &flags) < 0 ||
592 wpa_driver_wired_set_ifflags(drv->ifname,
593 flags & ~IFF_ALLMULTI) < 0)) {
594 wpa_printf(MSG_DEBUG, "%s: Failed to disable allmulti mode",
599 wpa_driver_wired_get_ifflags(drv->ifname, &flags) == 0 &&
601 wpa_driver_wired_set_ifflags(drv->ifname, flags & ~IFF_UP) < 0) {
602 wpa_printf(MSG_DEBUG, "%s: Failed to set the interface down",
606 if (drv->pf_sock != -1)
614 const struct wpa_driver_ops wpa_driver_wired_ops = {
616 .desc = "Wired Ethernet driver",
618 .hapd_init = wired_driver_hapd_init,
619 .hapd_deinit = wired_driver_hapd_deinit,
620 .hapd_send_eapol = wired_send_eapol,
622 .get_ssid = wpa_driver_wired_get_ssid,
623 .get_bssid = wpa_driver_wired_get_bssid,
624 .get_capa = wpa_driver_wired_get_capa,
625 .init = wpa_driver_wired_init,
626 .deinit = wpa_driver_wired_deinit,