2 * hostapd / Kernel driver communication via nl80211
3 * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
5 * Copyright (c) 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * Alternatively, this software may be distributed under the terms of BSD
15 * See README and COPYING for more details.
20 #include <sys/ioctl.h>
21 #include <netlink/genl/genl.h>
22 #include <netlink/genl/family.h>
23 #include <netlink/genl/ctrl.h>
24 #include <netlink/msg.h>
25 #include <netlink/attr.h>
26 #include "nl80211_copy.h"
28 #include <netpacket/packet.h>
29 #include "wireless_copy.h"
30 #include <linux/filter.h>
31 #include <net/if_arp.h>
37 #include "hw_features.h"
40 #include "radiotap_iter.h"
41 #include "ieee802_11_defs.h"
42 #include "ieee802_11_common.h"
45 /* libnl 2.0 compatibility code */
46 #define nl_handle_alloc_cb nl_socket_alloc_cb
47 #define nl_handle_destroy nl_socket_free
48 #endif /* CONFIG_LIBNL20 */
50 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
52 enum ieee80211_msg_type {
53 ieee80211_msg_normal = 0,
54 ieee80211_msg_tx_callback_ack = 1,
55 ieee80211_msg_tx_callback_fail = 2,
59 struct i802_bss *next;
60 char iface[IFNAMSIZ + 1];
61 unsigned int beacon_set:1;
64 struct i802_driver_data {
65 struct hostapd_data *hapd;
67 char iface[IFNAMSIZ + 1];
69 int ioctl_sock; /* socket for ioctl() use */
70 int wext_sock; /* socket for wireless events */
71 int eapol_sock; /* socket for EAPOL frames */
72 int monitor_sock; /* socket for monitor */
75 int default_if_indices[16];
80 struct nl_handle *nl_handle;
81 struct nl_cache *nl_cache;
83 struct genl_family *nl80211;
86 unsigned int ieee802_1x_active:1;
87 unsigned int ht_40mhz_scan:1;
91 struct hostapd_neighbor_bss *neighbors;
96 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
97 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
100 static struct i802_bss * get_bss(struct i802_driver_data *drv,
103 struct i802_bss *bss = &drv->bss;
105 if (os_strncmp(iface, bss->iface, IFNAMSIZ) == 0)
109 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
114 static void add_ifidx(struct i802_driver_data *drv, int ifidx)
119 for (i = 0; i < drv->num_if_indices; i++) {
120 if (drv->if_indices[i] == 0) {
121 drv->if_indices[i] = ifidx;
126 if (drv->if_indices != drv->default_if_indices)
127 old = drv->if_indices;
131 drv->if_indices = realloc(old,
132 sizeof(int) * (drv->num_if_indices + 1));
133 if (!drv->if_indices) {
135 drv->if_indices = drv->default_if_indices;
137 drv->if_indices = old;
138 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
140 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
143 drv->if_indices[drv->num_if_indices] = ifidx;
144 drv->num_if_indices++;
148 static void del_ifidx(struct i802_driver_data *drv, int ifidx)
152 for (i = 0; i < drv->num_if_indices; i++) {
153 if (drv->if_indices[i] == ifidx) {
154 drv->if_indices[i] = 0;
161 static int have_ifidx(struct i802_driver_data *drv, int ifidx)
165 if (ifidx == drv->bridge)
168 for (i = 0; i < drv->num_if_indices; i++)
169 if (drv->if_indices[i] == ifidx)
177 static int ack_handler(struct nl_msg *msg, void *arg)
184 static int finish_handler(struct nl_msg *msg, void *arg)
191 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
199 static int send_and_recv_msgs(struct i802_driver_data *drv,
201 int (*valid_handler)(struct nl_msg *, void *),
207 cb = nl_cb_clone(drv->nl_cb);
211 err = nl_send_auto_complete(drv->nl_handle, msg);
217 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
218 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
219 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
222 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
223 valid_handler, valid_data);
226 nl_recvmsgs(drv->nl_handle, cb);
233 static int hostapd_set_iface_flags(struct i802_driver_data *drv,
234 const char *ifname, int dev_up)
238 if (drv->ioctl_sock < 0)
241 memset(&ifr, 0, sizeof(ifr));
242 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
244 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
245 perror("ioctl[SIOCGIFFLAGS]");
246 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
252 ifr.ifr_flags |= IFF_UP;
254 ifr.ifr_flags &= ~IFF_UP;
256 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
257 perror("ioctl[SIOCSIFFLAGS]");
265 static int nl_set_encr(int ifindex, struct i802_driver_data *drv,
266 wpa_alg alg, const u8 *addr, int idx, const u8 *key,
267 size_t key_len, int txkey)
276 if (alg == WPA_ALG_NONE) {
277 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
278 0, NL80211_CMD_DEL_KEY, 0);
280 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
281 0, NL80211_CMD_NEW_KEY, 0);
282 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
286 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
289 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
293 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
296 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
299 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
302 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
303 "algorithm %d", __func__, alg);
310 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
311 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
312 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
314 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
319 * If we failed or don't need to set the default TX key (below),
322 if (ret || !txkey || addr)
329 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
330 0, NL80211_CMD_SET_KEY, 0);
331 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
332 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
333 if (alg == WPA_ALG_IGTK)
334 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
336 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
338 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
347 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
348 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
349 size_t seq_len, const u8 *key, size_t key_len)
351 struct i802_driver_data *drv = priv;
354 ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx, key,
363 static inline int min_int(int a, int b)
371 static int get_key_handler(struct nl_msg *msg, void *arg)
373 struct nlattr *tb[NL80211_ATTR_MAX + 1];
374 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
376 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
377 genlmsg_attrlen(gnlh, 0), NULL);
380 * TODO: validate the key index and mac address!
381 * Otherwise, there's a race condition as soon as
382 * the kernel starts sending key notifications.
385 if (tb[NL80211_ATTR_KEY_SEQ])
386 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
387 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
392 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
395 struct i802_driver_data *drv = priv;
402 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
403 0, NL80211_CMD_GET_KEY, 0);
406 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
407 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
408 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
412 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
418 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
421 struct i802_driver_data *drv = priv;
423 u8 rates[NL80211_MAX_SUPP_RATES];
431 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
432 NL80211_CMD_SET_BSS, 0);
434 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
435 rates[rates_len++] = basic_rates[i] / 5;
437 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
439 /* TODO: multi-BSS support */
440 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
442 return send_and_recv_msgs(drv, msg, NULL, NULL);
448 static int i802_send_frame(void *priv, const void *data, size_t len,
449 int encrypt, int flags)
452 0x00, 0x00, /* radiotap version */
453 0x0e, 0x00, /* radiotap length */
454 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
455 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
457 0x00, 0x00, /* RX and TX flags to indicate that */
458 0x00, 0x00, /* this is the injected frame directly */
460 struct i802_driver_data *drv = priv;
461 struct iovec iov[2] = {
463 .iov_base = &rtap_hdr,
464 .iov_len = sizeof(rtap_hdr),
467 .iov_base = (void*)data,
471 struct msghdr msg = {
482 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
484 return sendmsg(drv->monitor_sock, &msg, flags);
487 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
490 struct ieee80211_mgmt *mgmt;
491 int do_not_encrypt = 0;
494 mgmt = (struct ieee80211_mgmt *) data;
495 fc = le_to_host16(mgmt->frame_control);
497 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
498 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
500 * Only one of the authentication frame types is encrypted.
501 * In order for static WEP encryption to work properly (i.e.,
502 * to not encrypt the frame), we need to tell mac80211 about
503 * the frames that must not be encrypted.
505 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
506 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
507 if (auth_alg == WLAN_AUTH_OPEN ||
508 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
512 return i802_send_frame(priv, data, len, !do_not_encrypt, flags);
515 /* Set kernel driver on given frequency (MHz) */
516 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
518 struct i802_driver_data *drv = priv;
525 drv->last_freq = freq->freq;
526 drv->last_freq_ht = freq->ht_enabled;
528 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
529 NL80211_CMD_SET_WIPHY, 0);
531 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
532 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
533 if (freq->ht_enabled) {
534 switch (freq->sec_channel_offset) {
536 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
537 NL80211_CHAN_HT40MINUS);
540 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
541 NL80211_CHAN_HT40PLUS);
544 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
550 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
557 static int i802_set_rts(void *priv, int rts)
559 struct i802_driver_data *drv = priv;
562 memset(&iwr, 0, sizeof(iwr));
563 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
564 iwr.u.rts.value = rts;
567 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
568 perror("ioctl[SIOCSIWRTS]");
576 static int i802_set_frag(void *priv, int frag)
578 struct i802_driver_data *drv = priv;
581 memset(&iwr, 0, sizeof(iwr));
582 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
583 iwr.u.frag.value = frag;
584 iwr.u.frag.fixed = 1;
586 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
587 perror("ioctl[SIOCSIWFRAG]");
595 static int i802_set_retry(void *priv, int short_retry, int long_retry)
597 struct i802_driver_data *drv = priv;
600 memset(&iwr, 0, sizeof(iwr));
601 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
603 iwr.u.retry.value = short_retry;
604 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
605 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
606 perror("ioctl[SIOCSIWRETRY(short)]");
610 iwr.u.retry.value = long_retry;
611 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
612 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
613 perror("ioctl[SIOCSIWRETRY(long)]");
621 static int i802_flush(void *priv)
623 struct i802_driver_data *drv = priv;
630 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
631 0, NL80211_CMD_DEL_STATION, 0);
634 * XXX: FIX! this needs to flush all VLANs too
636 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
637 if_nametoindex(drv->iface));
639 return send_and_recv_msgs(drv, msg, NULL, NULL);
645 static int get_sta_handler(struct nl_msg *msg, void *arg)
647 struct nlattr *tb[NL80211_ATTR_MAX + 1];
648 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
649 struct hostap_sta_driver_data *data = arg;
650 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
651 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
652 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
653 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
654 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
655 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
656 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
659 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
660 genlmsg_attrlen(gnlh, 0), NULL);
663 * TODO: validate the interface and mac address!
664 * Otherwise, there's a race condition as soon as
665 * the kernel starts sending station notifications.
668 if (!tb[NL80211_ATTR_STA_INFO]) {
669 wpa_printf(MSG_DEBUG, "sta stats missing!");
672 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
673 tb[NL80211_ATTR_STA_INFO],
675 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
679 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
680 data->inactive_msec =
681 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
682 if (stats[NL80211_STA_INFO_RX_BYTES])
683 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
684 if (stats[NL80211_STA_INFO_TX_BYTES])
685 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
686 if (stats[NL80211_STA_INFO_RX_PACKETS])
688 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
689 if (stats[NL80211_STA_INFO_TX_PACKETS])
691 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
696 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
699 struct i802_driver_data *drv = priv;
702 os_memset(data, 0, sizeof(*data));
707 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
708 0, NL80211_CMD_GET_STATION, 0);
710 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
711 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
713 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
719 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
720 size_t data_len, int encrypt, const u8 *own_addr)
722 struct i802_driver_data *drv = priv;
723 struct ieee80211_hdr *hdr;
728 int qos = sta->flags & WLAN_STA_WME;
733 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
735 hdr = os_zalloc(len);
737 printf("malloc() failed for i802_send_data(len=%lu)\n",
738 (unsigned long) len);
743 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
744 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
746 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
747 #if 0 /* To be enabled if qos determination is added above */
749 hdr->frame_control |=
750 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
754 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
755 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
756 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
757 pos = (u8 *) (hdr + 1);
759 #if 0 /* To be enabled if qos determination is added above */
761 /* add an empty QoS header if needed */
768 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
769 pos += sizeof(rfc1042_header);
770 WPA_PUT_BE16(pos, ETH_P_PAE);
772 memcpy(pos, data, data_len);
774 res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
778 perror("i802_send_eapol: send");
779 printf("i802_send_eapol - packet len: %lu - failed\n",
780 (unsigned long) len);
787 static int i802_sta_add(const char *ifname, void *priv,
788 struct hostapd_sta_add_params *params)
790 struct i802_driver_data *drv = priv;
798 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
799 0, NL80211_CMD_NEW_STATION, 0);
801 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
802 if_nametoindex(drv->iface));
803 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
804 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
805 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
807 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
808 params->listen_interval);
810 #ifdef CONFIG_IEEE80211N
811 if (params->ht_capabilities) {
812 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
813 params->ht_capabilities->length,
814 ¶ms->ht_capabilities->data);
816 #endif /* CONFIG_IEEE80211N */
818 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
820 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
821 "result: %d (%s)", ret, strerror(-ret));
829 static int i802_sta_remove(void *priv, const u8 *addr)
831 struct i802_driver_data *drv = priv;
839 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
840 0, NL80211_CMD_DEL_STATION, 0);
842 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
843 if_nametoindex(drv->iface));
844 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
846 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
855 static int i802_sta_set_flags(void *priv, const u8 *addr,
856 int total_flags, int flags_or, int flags_and)
858 struct i802_driver_data *drv = priv;
859 struct nl_msg *msg, *flags = NULL;
865 flags = nlmsg_alloc();
871 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
872 0, NL80211_CMD_SET_STATION, 0);
874 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
875 if_nametoindex(drv->iface));
876 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
878 if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
879 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
881 if (total_flags & WLAN_STA_WMM)
882 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
884 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
885 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
887 if (total_flags & WLAN_STA_MFP)
888 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
890 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
891 goto nla_put_failure;
895 return send_and_recv_msgs(drv, msg, NULL, NULL);
902 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
903 int cw_min, int cw_max, int burst_time)
905 struct i802_driver_data *drv = priv;
907 struct nlattr *txq, *params;
913 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
914 0, NL80211_CMD_SET_WIPHY, 0);
916 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
918 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
920 goto nla_put_failure;
922 /* We are only sending parameters for a single TXQ at a time */
923 params = nla_nest_start(msg, 1);
925 goto nla_put_failure;
927 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
928 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
929 * 32 usec, so need to convert the value here. */
930 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
931 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
932 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
933 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
935 nla_nest_end(msg, params);
937 nla_nest_end(msg, txq);
939 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
946 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
950 /* stop listening for EAPOL on this interface */
951 del_ifidx(drv, ifidx);
955 goto nla_put_failure;
957 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
958 0, NL80211_CMD_DEL_INTERFACE, 0);
959 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
961 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
964 printf("Failed to remove interface.\n");
968 static int nl80211_create_iface(struct i802_driver_data *drv,
970 enum nl80211_iftype iftype,
973 struct nl_msg *msg, *flags = NULL;
983 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
984 0, NL80211_CMD_NEW_INTERFACE, 0);
985 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
986 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
987 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
989 if (iftype == NL80211_IFTYPE_MONITOR) {
992 flags = nlmsg_alloc();
994 goto nla_put_failure;
996 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
998 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1003 goto nla_put_failure;
1006 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1009 printf("Failed to create interface %s.\n", ifname);
1013 ifidx = if_nametoindex(ifname);
1018 /* start listening for EAPOL on this interface */
1019 add_ifidx(drv, ifidx);
1023 case NL80211_IFTYPE_AP:
1024 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1025 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1026 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1028 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1029 nl80211_remove_iface(drv, ifidx);
1033 case NL80211_IFTYPE_WDS:
1034 memset(&iwr, 0, sizeof(iwr));
1035 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1036 iwr.u.addr.sa_family = ARPHRD_ETHER;
1037 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1038 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1051 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1053 struct i802_driver_data *drv = priv;
1055 struct i802_bss *bss;
1057 bss = os_zalloc(sizeof(*bss));
1060 os_strlcpy(bss->iface, ifname, IFNAMSIZ);
1062 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1067 if (hostapd_set_iface_flags(priv, ifname, 1)) {
1068 nl80211_remove_iface(priv, ifidx);
1072 bss->next = drv->bss.next;
1073 drv->bss.next = bss;
1078 static int i802_bss_remove(void *priv, const char *ifname)
1080 struct i802_driver_data *drv = priv;
1081 struct i802_bss *bss, *prev;
1082 nl80211_remove_iface(priv, if_nametoindex(ifname));
1084 bss = drv->bss.next;
1086 if (os_strncmp(ifname, bss->iface, IFNAMSIZ) == 0) {
1087 prev->next = bss->next;
1098 static int i802_set_beacon(const char *iface, void *priv,
1099 const u8 *head, size_t head_len,
1100 const u8 *tail, size_t tail_len, int dtim_period)
1102 struct i802_driver_data *drv = priv;
1104 u8 cmd = NL80211_CMD_NEW_BEACON;
1106 struct i802_bss *bss;
1108 bss = get_bss(drv, iface);
1112 msg = nlmsg_alloc();
1116 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
1117 iface, bss->beacon_set);
1118 if (bss->beacon_set)
1119 cmd = NL80211_CMD_SET_BEACON;
1121 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1123 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1124 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1125 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1126 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1127 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
1129 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1131 bss->beacon_set = 1;
1138 static int i802_del_beacon(struct i802_driver_data *drv)
1142 msg = nlmsg_alloc();
1146 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1147 0, NL80211_CMD_DEL_BEACON, 0);
1148 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1150 return send_and_recv_msgs(drv, msg, NULL, NULL);
1156 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1158 struct i802_driver_data *drv = priv;
1161 * FIXME: This needs to be per interface (BSS)
1163 drv->ieee802_1x_active = enabled;
1168 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1170 struct i802_driver_data *drv = priv;
1173 memset(&iwr, 0, sizeof(iwr));
1175 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1176 iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1177 iwr.u.param.value = enabled;
1179 ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1181 /* ignore errors, the kernel/driver might not care */
1186 static int i802_set_internal_bridge(void *priv, int value)
1192 static int i802_set_beacon_int(void *priv, int value)
1194 struct i802_driver_data *drv = priv;
1197 drv->beacon_int = value;
1199 if (!drv->bss.beacon_set)
1202 msg = nlmsg_alloc();
1206 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
1207 "(beacon_set=%d)", value, drv->bss.beacon_set);
1208 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1209 0, NL80211_CMD_SET_BEACON, 0);
1210 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1212 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1214 return send_and_recv_msgs(drv, msg, NULL, NULL);
1220 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1222 struct i802_driver_data *drv = priv;
1225 msg = nlmsg_alloc();
1229 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1230 NL80211_CMD_SET_BSS, 0);
1233 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1235 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1237 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1239 /* TODO: multi-BSS support */
1240 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1242 return send_and_recv_msgs(drv, msg, NULL, NULL);
1248 static int i802_set_cts_protect(void *priv, int value)
1250 return i802_set_bss(priv, value, -1, -1);
1254 static int i802_set_preamble(void *priv, int value)
1256 return i802_set_bss(priv, -1, value, -1);
1260 static int i802_set_short_slot_time(void *priv, int value)
1262 return i802_set_bss(priv, -1, -1, value);
1266 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1269 case HOSTAPD_IF_VLAN:
1270 return NL80211_IFTYPE_AP_VLAN;
1271 case HOSTAPD_IF_WDS:
1272 return NL80211_IFTYPE_WDS;
1278 static int i802_if_add(const char *iface, void *priv,
1279 enum hostapd_driver_if_type type, char *ifname,
1282 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1288 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1289 char *ifname, const u8 *addr)
1291 /* unused at the moment */
1296 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1297 const char *ifname, const u8 *addr)
1299 nl80211_remove_iface(priv, if_nametoindex(ifname));
1304 struct phy_info_arg {
1306 struct hostapd_hw_modes *modes;
1309 static int phy_info_handler(struct nl_msg *msg, void *arg)
1311 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1312 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1313 struct phy_info_arg *phy_info = arg;
1315 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1317 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1318 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1319 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1320 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1321 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1322 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1323 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1324 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1327 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1328 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1329 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1330 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1333 struct nlattr *nl_band;
1334 struct nlattr *nl_freq;
1335 struct nlattr *nl_rate;
1336 int rem_band, rem_freq, rem_rate;
1337 struct hostapd_hw_modes *mode;
1338 int idx, mode_is_set;
1340 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1341 genlmsg_attrlen(gnlh, 0), NULL);
1343 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1346 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1347 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1350 phy_info->modes = mode;
1354 mode = &phy_info->modes[*(phy_info->num_modes)];
1355 memset(mode, 0, sizeof(*mode));
1356 *(phy_info->num_modes) += 1;
1358 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1359 nla_len(nl_band), NULL);
1361 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1362 mode->ht_capab = nla_get_u16(
1363 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1366 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1367 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1368 nla_len(nl_freq), freq_policy);
1369 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1371 mode->num_channels++;
1374 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1375 if (!mode->channels)
1380 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1381 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1382 nla_len(nl_freq), freq_policy);
1383 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1386 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1387 mode->channels[idx].flag = 0;
1390 /* crude heuristic */
1391 if (mode->channels[idx].freq < 4000)
1392 mode->mode = HOSTAPD_MODE_IEEE80211B;
1394 mode->mode = HOSTAPD_MODE_IEEE80211A;
1398 /* crude heuristic */
1399 if (mode->channels[idx].freq < 4000)
1400 if (mode->channels[idx].freq == 2848)
1401 mode->channels[idx].chan = 14;
1403 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1405 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1407 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1408 mode->channels[idx].flag |=
1409 HOSTAPD_CHAN_DISABLED;
1410 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1411 mode->channels[idx].flag |=
1412 HOSTAPD_CHAN_PASSIVE_SCAN;
1413 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1414 mode->channels[idx].flag |=
1415 HOSTAPD_CHAN_NO_IBSS;
1416 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1417 mode->channels[idx].flag |=
1420 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1421 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1422 mode->channels[idx].max_tx_power =
1423 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1428 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1429 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1430 nla_len(nl_rate), rate_policy);
1431 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1436 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1442 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1443 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1444 nla_len(nl_rate), rate_policy);
1445 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1447 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1449 /* crude heuristic */
1450 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1451 mode->rates[idx].rate > 200)
1452 mode->mode = HOSTAPD_MODE_IEEE80211G;
1454 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1455 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1464 static struct hostapd_hw_modes *i802_add_11b(struct hostapd_hw_modes *modes,
1468 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1469 int i, mode11g_idx = -1;
1471 /* If only 802.11g mode is included, use it to construct matching
1472 * 802.11b mode data. */
1474 for (m = 0; m < *num_modes; m++) {
1475 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1476 return modes; /* 802.11b already included */
1477 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1481 if (mode11g_idx < 0)
1482 return modes; /* 2.4 GHz band not supported at all */
1484 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1486 return modes; /* Could not add 802.11b mode */
1488 mode = &nmodes[*num_modes];
1489 os_memset(mode, 0, sizeof(*mode));
1493 mode->mode = HOSTAPD_MODE_IEEE80211B;
1495 mode11g = &modes[mode11g_idx];
1496 mode->num_channels = mode11g->num_channels;
1497 mode->channels = os_malloc(mode11g->num_channels *
1498 sizeof(struct hostapd_channel_data));
1499 if (mode->channels == NULL) {
1501 return modes; /* Could not add 802.11b mode */
1503 os_memcpy(mode->channels, mode11g->channels,
1504 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1506 mode->num_rates = 0;
1507 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1508 if (mode->rates == NULL) {
1509 os_free(mode->channels);
1511 return modes; /* Could not add 802.11b mode */
1514 for (i = 0; i < mode11g->num_rates; i++) {
1515 if (mode11g->rates[i].rate > 110 ||
1516 mode11g->rates[i].flags &
1517 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1519 mode->rates[mode->num_rates] = mode11g->rates[i];
1521 if (mode->num_rates == 4)
1525 if (mode->num_rates == 0) {
1526 os_free(mode->channels);
1527 os_free(mode->rates);
1529 return modes; /* No 802.11b rates */
1532 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1538 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1542 struct i802_driver_data *drv = priv;
1544 struct phy_info_arg result = {
1545 .num_modes = num_modes,
1552 msg = nlmsg_alloc();
1556 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1557 0, NL80211_CMD_GET_WIPHY, 0);
1559 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1561 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1562 return i802_add_11b(result.modes, num_modes);
1568 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1569 const char *ifname, int vlan_id)
1571 struct i802_driver_data *drv = priv;
1574 msg = nlmsg_alloc();
1578 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1579 0, NL80211_CMD_SET_STATION, 0);
1581 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1582 if_nametoindex(drv->iface));
1583 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1584 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1585 if_nametoindex(ifname));
1587 return send_and_recv_msgs(drv, msg, NULL, NULL);
1593 static int i802_set_country(void *priv, const char *country)
1595 struct i802_driver_data *drv = priv;
1599 msg = nlmsg_alloc();
1603 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1604 0, NL80211_CMD_REQ_SET_REG, 0);
1606 alpha2[0] = country[0];
1607 alpha2[1] = country[1];
1609 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1611 return send_and_recv_msgs(drv, msg, NULL, NULL);
1617 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1620 struct ieee80211_hdr *hdr;
1621 u16 fc, type, stype;
1623 hdr = (struct ieee80211_hdr *) buf;
1624 fc = le_to_host16(hdr->frame_control);
1626 type = WLAN_FC_GET_TYPE(fc);
1627 stype = WLAN_FC_GET_STYPE(fc);
1630 case WLAN_FC_TYPE_MGMT:
1631 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1632 ok ? "ACK" : "fail");
1633 hostapd_mgmt_tx_cb(hapd, buf, len, stype, ok);
1635 case WLAN_FC_TYPE_CTRL:
1636 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1637 ok ? "ACK" : "fail");
1639 case WLAN_FC_TYPE_DATA:
1640 hostapd_tx_status(hapd, hdr->addr1, buf, len, ok);
1643 printf("unknown TX callback frame type %d\n", type);
1649 static void handle_frame(struct i802_driver_data *drv,
1650 struct hostapd_iface *iface, u8 *buf, size_t len,
1651 struct hostapd_frame_info *hfi,
1652 enum ieee80211_msg_type msg_type)
1654 struct ieee80211_hdr *hdr;
1655 u16 fc, type, stype;
1656 size_t data_len = len;
1657 struct hostapd_data *hapd = NULL;
1658 int broadcast_bssid = 0;
1663 * PS-Poll frames are 16 bytes. All other frames are
1664 * 24 bytes or longer.
1669 hdr = (struct ieee80211_hdr *) buf;
1670 fc = le_to_host16(hdr->frame_control);
1672 type = WLAN_FC_GET_TYPE(fc);
1673 stype = WLAN_FC_GET_STYPE(fc);
1676 case WLAN_FC_TYPE_DATA:
1679 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1683 case WLAN_FC_FROMDS:
1691 case WLAN_FC_TYPE_CTRL:
1692 /* discard non-ps-poll frames */
1693 if (stype != WLAN_FC_STYPE_PSPOLL)
1697 case WLAN_FC_TYPE_MGMT:
1705 /* find interface frame belongs to */
1706 for (i = 0; i < iface->num_bss; i++) {
1707 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1708 hapd = iface->bss[i];
1714 hapd = iface->bss[0];
1716 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1717 bssid[2] != 0xff || bssid[3] != 0xff ||
1718 bssid[4] != 0xff || bssid[5] != 0xff) {
1720 * Unknown BSSID - drop frame if this is not from
1721 * passive scanning or a beacon (at least ProbeReq
1722 * frames to other APs may be allowed through RX
1723 * filtering in the wlan hw/driver)
1725 if ((type != WLAN_FC_TYPE_MGMT ||
1726 stype != WLAN_FC_STYPE_BEACON))
1729 broadcast_bssid = 1;
1733 case ieee80211_msg_normal:
1734 /* continue processing */
1736 case ieee80211_msg_tx_callback_ack:
1737 handle_tx_callback(hapd, buf, data_len, 1);
1739 case ieee80211_msg_tx_callback_fail:
1740 handle_tx_callback(hapd, buf, data_len, 0);
1745 case WLAN_FC_TYPE_MGMT:
1746 if (stype != WLAN_FC_STYPE_BEACON &&
1747 stype != WLAN_FC_STYPE_PROBE_REQ)
1748 wpa_printf(MSG_MSGDUMP, "MGMT");
1749 if (broadcast_bssid) {
1750 for (i = 0; i < iface->num_bss; i++)
1751 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
1754 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
1756 case WLAN_FC_TYPE_CTRL:
1757 /* can only get here with PS-Poll frames */
1758 wpa_printf(MSG_DEBUG, "CTRL");
1759 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
1761 case WLAN_FC_TYPE_DATA:
1762 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
1768 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1770 struct i802_driver_data *drv = eloop_ctx;
1771 struct hostapd_data *hapd = drv->hapd;
1772 struct sockaddr_ll lladdr;
1773 unsigned char buf[3000];
1775 socklen_t fromlen = sizeof(lladdr);
1777 len = recvfrom(sock, buf, sizeof(buf), 0,
1778 (struct sockaddr *)&lladdr, &fromlen);
1784 if (have_ifidx(drv, lladdr.sll_ifindex))
1785 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
1789 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1791 struct i802_driver_data *drv = eloop_ctx;
1793 unsigned char buf[3000];
1794 struct hostapd_data *hapd = drv->hapd;
1795 struct ieee80211_radiotap_iterator iter;
1797 struct hostapd_frame_info hfi;
1798 int injected = 0, failed = 0, msg_type, rxflags = 0;
1800 len = recv(sock, buf, sizeof(buf), 0);
1806 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1807 printf("received invalid radiotap frame\n");
1811 memset(&hfi, 0, sizeof(hfi));
1814 ret = ieee80211_radiotap_iterator_next(&iter);
1818 printf("received invalid radiotap frame (%d)\n", ret);
1821 switch (iter.this_arg_index) {
1822 case IEEE80211_RADIOTAP_FLAGS:
1823 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1826 case IEEE80211_RADIOTAP_RX_FLAGS:
1829 case IEEE80211_RADIOTAP_TX_FLAGS:
1831 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1832 IEEE80211_RADIOTAP_F_TX_FAIL;
1834 case IEEE80211_RADIOTAP_DATA_RETRIES:
1836 case IEEE80211_RADIOTAP_CHANNEL:
1837 /* TODO convert from freq/flags to channel number
1842 case IEEE80211_RADIOTAP_RATE:
1843 hfi.datarate = *iter.this_arg * 5;
1845 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1846 hfi.ssi_signal = *iter.this_arg;
1851 if (rxflags && injected)
1855 msg_type = ieee80211_msg_normal;
1857 msg_type = ieee80211_msg_tx_callback_fail;
1859 msg_type = ieee80211_msg_tx_callback_ack;
1861 handle_frame(drv, hapd->iface, buf + iter.max_length,
1862 len - iter.max_length, &hfi, msg_type);
1867 * we post-process the filter code later and rewrite
1868 * this to the offset to the last instruction
1873 static struct sock_filter msock_filter_insns[] = {
1875 * do a little-endian load of the radiotap length field
1877 /* load lower byte into A */
1878 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
1879 /* put it into X (== index register) */
1880 BPF_STMT(BPF_MISC| BPF_TAX, 0),
1881 /* load upper byte into A */
1882 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
1883 /* left-shift it by 8 */
1884 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
1886 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
1887 /* put result into X */
1888 BPF_STMT(BPF_MISC| BPF_TAX, 0),
1891 * Allow management frames through, this also gives us those
1892 * management frames that we sent ourselves with status
1894 /* load the lower byte of the IEEE 802.11 frame control field */
1895 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
1896 /* mask off frame type and version */
1897 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
1898 /* accept frame if it's both 0, fall through otherwise */
1899 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
1902 * TODO: add a bit to radiotap RX flags that indicates
1903 * that the sending station is not associated, then
1904 * add a filter here that filters on our DA and that flag
1905 * to allow us to deauth frames to that bad station.
1907 * Not a regression -- we didn't do it before either.
1912 * drop non-data frames, WDS frames
1914 /* load the lower byte of the frame control field */
1915 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
1916 /* mask off QoS bit */
1917 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
1918 /* drop non-data frames */
1919 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
1920 /* load the upper byte of the frame control field */
1921 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
1922 /* mask off toDS/fromDS */
1923 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
1924 /* drop WDS frames */
1925 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
1929 * add header length to index
1931 /* load the lower byte of the frame control field */
1932 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
1933 /* mask off QoS bit */
1934 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
1935 /* right shift it by 6 to give 0 or 2 */
1936 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
1937 /* add data frame header length */
1938 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
1939 /* add index, was start of 802.11 header */
1940 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
1941 /* move to index, now start of LL header */
1942 BPF_STMT(BPF_MISC | BPF_TAX, 0),
1945 * Accept empty data frames, we use those for
1948 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
1949 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
1952 * Accept EAPOL frames
1954 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
1955 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
1956 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
1957 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
1959 /* keep these last two statements or change the code below */
1960 /* return 0 == "DROP" */
1961 BPF_STMT(BPF_RET | BPF_K, 0),
1962 /* return ~0 == "keep all" */
1963 BPF_STMT(BPF_RET | BPF_K, ~0),
1966 static struct sock_fprog msock_filter = {
1967 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
1968 .filter = msock_filter_insns,
1972 static int add_monitor_filter(int s)
1976 /* rewrite all PASS/FAIL jump offsets */
1977 for (idx = 0; idx < msock_filter.len; idx++) {
1978 struct sock_filter *insn = &msock_filter_insns[idx];
1980 if (BPF_CLASS(insn->code) == BPF_JMP) {
1981 if (insn->code == (BPF_JMP|BPF_JA)) {
1982 if (insn->k == PASS)
1983 insn->k = msock_filter.len - idx - 2;
1984 else if (insn->k == FAIL)
1985 insn->k = msock_filter.len - idx - 3;
1988 if (insn->jt == PASS)
1989 insn->jt = msock_filter.len - idx - 2;
1990 else if (insn->jt == FAIL)
1991 insn->jt = msock_filter.len - idx - 3;
1993 if (insn->jf == PASS)
1994 insn->jf = msock_filter.len - idx - 2;
1995 else if (insn->jf == FAIL)
1996 insn->jf = msock_filter.len - idx - 3;
2000 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2001 &msock_filter, sizeof(msock_filter))) {
2002 perror("SO_ATTACH_FILTER");
2010 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
2013 struct sockaddr_ll ll;
2017 snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
2018 buf[IFNAMSIZ - 1] = '\0';
2020 drv->monitor_ifidx =
2021 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2023 if (drv->monitor_ifidx < 0)
2026 if (hostapd_set_iface_flags(drv, buf, 1))
2029 memset(&ll, 0, sizeof(ll));
2030 ll.sll_family = AF_PACKET;
2031 ll.sll_ifindex = drv->monitor_ifidx;
2032 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2033 if (drv->monitor_sock < 0) {
2034 perror("socket[PF_PACKET,SOCK_RAW]");
2038 if (add_monitor_filter(drv->monitor_sock)) {
2039 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2040 "interface; do filtering in user space");
2041 /* This works, but will cost in performance. */
2044 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
2046 perror("monitor socket bind");
2050 optlen = sizeof(optval);
2053 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2054 perror("Failed to set socket priority");
2058 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2060 printf("Could not register monitor read socket\n");
2066 nl80211_remove_iface(drv, drv->monitor_ifidx);
2071 static int nl80211_set_mode(struct i802_driver_data *drv, const char *ifname,
2077 msg = nlmsg_alloc();
2081 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2082 0, NL80211_CMD_SET_INTERFACE, 0);
2083 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2084 if_nametoindex(ifname));
2085 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
2087 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2091 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
2097 #ifdef CONFIG_IEEE80211N
2098 static void i802_add_neighbor(struct i802_driver_data *drv, u8 *bssid,
2099 int freq, u8 *ie, size_t ie_len)
2101 struct ieee802_11_elems elems;
2102 int ht, pri_chan = 0, sec_chan = 0;
2103 struct ieee80211_ht_operation *oper;
2104 struct hostapd_neighbor_bss *nnei;
2106 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
2107 ht = elems.ht_capabilities || elems.ht_operation;
2108 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
2109 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
2110 pri_chan = oper->control_chan;
2111 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
2112 if (oper->ht_param &
2113 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
2114 sec_chan = pri_chan + 4;
2115 else if (oper->ht_param &
2116 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
2117 sec_chan = pri_chan - 4;
2121 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
2122 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
2123 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
2125 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
2126 sizeof(struct hostapd_neighbor_bss));
2129 drv->neighbors = nnei;
2130 nnei = &nnei[drv->num_neighbors];
2131 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
2134 nnei->pri_chan = pri_chan;
2135 nnei->sec_chan = sec_chan;
2136 drv->num_neighbors++;
2140 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
2142 int divi = 1000000, i;
2144 if (iwe->u.freq.e == 0) {
2146 * Some drivers do not report frequency, but a channel.
2147 * Try to map this to frequency by assuming they are using
2148 * IEEE 802.11b/g. But don't overwrite a previously parsed
2149 * frequency if the driver sends both frequency and channel,
2150 * since the driver may be sending an A-band channel that we
2151 * don't handle here.
2157 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
2158 *freq = 2407 + 5 * iwe->u.freq.m;
2160 } else if (iwe->u.freq.m == 14) {
2166 if (iwe->u.freq.e > 6) {
2167 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
2168 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
2172 for (i = 0; i < iwe->u.freq.e; i++)
2174 *freq = iwe->u.freq.m / divi;
2179 static int i802_parse_scan(struct i802_driver_data *drv, u8 *res_buf,
2184 struct iw_event iwe_buf, *iwe = &iwe_buf;
2185 char *pos, *end, *custom;
2194 pos = (char *) res_buf;
2195 end = (char *) res_buf + len;
2197 while (pos + IW_EV_LCP_LEN <= end) {
2198 /* Event data may be unaligned, so make a local, aligned copy
2199 * before processing. */
2200 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2201 if (iwe->len <= IW_EV_LCP_LEN)
2204 custom = pos + IW_EV_POINT_LEN;
2205 if (iwe->cmd == IWEVGENIE) {
2206 /* WE-19 removed the pointer from struct iw_point */
2207 char *dpos = (char *) &iwe_buf.u.data.length;
2208 int dlen = dpos - (char *) &iwe_buf;
2209 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
2210 sizeof(struct iw_event) - dlen);
2212 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2213 custom += IW_EV_POINT_OFF;
2219 i802_add_neighbor(drv, bssid, freq, ie,
2222 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
2228 i802_get_scan_freq(iwe, &freq);
2231 if (custom + iwe->u.data.length > end) {
2232 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
2236 ie_len = iwe->u.data.length;
2244 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
2250 static int i802_get_ht_scan_res(struct i802_driver_data *drv)
2257 res_buf_len = IW_SCAN_MAX_DATA;
2259 res_buf = os_malloc(res_buf_len);
2260 if (res_buf == NULL)
2262 os_memset(&iwr, 0, sizeof(iwr));
2263 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2264 iwr.u.data.pointer = res_buf;
2265 iwr.u.data.length = res_buf_len;
2267 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
2270 if (errno == E2BIG && res_buf_len < 65535) {
2274 if (res_buf_len > 65535)
2275 res_buf_len = 65535; /* 16-bit length field */
2276 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
2277 "trying larger buffer (%lu bytes)",
2278 (unsigned long) res_buf_len);
2280 perror("ioctl[SIOCGIWSCAN]");
2286 if (iwr.u.data.length > res_buf_len) {
2291 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
2298 static int i802_is_event_wireless_scan_complete(char *data, int len)
2300 struct iw_event iwe_buf, *iwe = &iwe_buf;
2306 while (pos + IW_EV_LCP_LEN <= end) {
2307 /* Event data may be unaligned, so make a local, aligned copy
2308 * before processing. */
2309 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2310 if (iwe->cmd == SIOCGIWSCAN)
2320 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
2322 struct ifinfomsg *ifi;
2323 int attrlen, _nlmsg_len, rta_len;
2324 struct rtattr *attr;
2326 if (len < (int) sizeof(*ifi))
2329 ifi = NLMSG_DATA(h);
2331 if (ifindex != ifi->ifi_index)
2332 return 0; /* event for foreign ifindex */
2334 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2336 attrlen = h->nlmsg_len - _nlmsg_len;
2340 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
2342 rta_len = RTA_ALIGN(sizeof(struct rtattr));
2343 while (RTA_OK(attr, attrlen)) {
2344 if (attr->rta_type == IFLA_WIRELESS &&
2345 i802_is_event_wireless_scan_complete(
2346 ((char *) attr) + rta_len,
2347 attr->rta_len - rta_len))
2349 attr = RTA_NEXT(attr, attrlen);
2356 static int i802_is_scan_complete(int s, int ifindex)
2362 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
2364 perror("recv(netlink)");
2368 h = (struct nlmsghdr *) buf;
2369 while (left >= (int) sizeof(*h)) {
2373 plen = len - sizeof(*h);
2374 if (len > left || plen < 0) {
2375 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
2376 "len=%d left=%d plen=%d",
2381 switch (h->nlmsg_type) {
2383 if (i802_is_rtm_scan_complete(ifindex, h, plen))
2388 len = NLMSG_ALIGN(len);
2390 h = (struct nlmsghdr *) ((char *) h + len);
2397 static int i802_ht_scan(struct i802_driver_data *drv)
2400 int s, res, ifindex;
2401 struct sockaddr_nl local;
2406 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
2407 "starting HT 20/40 MHz BSS");
2409 /* Request a new scan */
2410 /* TODO: would be enough to scan the selected band */
2411 os_memset(&iwr, 0, sizeof(iwr));
2412 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2413 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
2414 perror("ioctl[SIOCSIWSCAN]");
2418 ifindex = if_nametoindex(drv->iface);
2420 /* Wait for scan completion event or timeout */
2421 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2423 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2427 os_memset(&local, 0, sizeof(local));
2428 local.nl_family = AF_NETLINK;
2429 local.nl_groups = RTMGRP_LINK;
2430 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2431 perror("bind(netlink)");
2437 end += 30; /* Wait at most 30 seconds for scan results */
2440 tv.tv_sec = end > now ? end - now : 0;
2444 res = select(s + 1, &rfds, NULL, NULL, &tv);
2447 /* Assume results are ready after 10 seconds wait */
2451 if (i802_is_scan_complete(s, ifindex)) {
2452 wpa_printf(MSG_DEBUG, "nl80211: Scan "
2457 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
2458 /* Assume results are ready to be read now */
2465 return i802_get_ht_scan_res(drv);
2467 #endif /* CONFIG_IEEE80211N */
2470 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
2473 struct sockaddr_ll addr;
2475 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
2476 if (drv->ioctl_sock < 0) {
2477 perror("socket[PF_INET,SOCK_DGRAM]");
2481 /* start listening for EAPOL on the default AP interface */
2482 add_ifidx(drv, if_nametoindex(drv->iface));
2484 if (hostapd_set_iface_flags(drv, drv->iface, 0))
2488 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
2489 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
2490 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2492 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
2493 perror("ioctl(SIOCSIFHWADDR)");
2499 * initialise generic netlink and nl80211
2501 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
2503 printf("Failed to allocate netlink callbacks.\n");
2507 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
2508 if (!drv->nl_handle) {
2509 printf("Failed to allocate netlink handle.\n");
2513 if (genl_connect(drv->nl_handle)) {
2514 printf("Failed to connect to generic netlink.\n");
2518 #ifdef CONFIG_LIBNL20
2519 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
2520 printf("Failed to allocate generic netlink cache.\n");
2523 #else /* CONFIG_LIBNL20 */
2524 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
2525 if (!drv->nl_cache) {
2526 printf("Failed to allocate generic netlink cache.\n");
2529 #endif /* CONFIG_LIBNL20 */
2531 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
2532 if (!drv->nl80211) {
2533 printf("nl80211 not found.\n");
2537 #ifdef CONFIG_IEEE80211N
2538 if (drv->ht_40mhz_scan) {
2539 if (nl80211_set_mode(drv, drv->iface, NL80211_IFTYPE_STATION)
2540 || hostapd_set_iface_flags(drv, drv->iface, 1) ||
2541 i802_ht_scan(drv) ||
2542 hostapd_set_iface_flags(drv, drv->iface, 0)) {
2543 wpa_printf(MSG_ERROR, "Failed to scan channels for "
2544 "HT 40 MHz operations");
2548 #endif /* CONFIG_IEEE80211N */
2550 /* Initialise a monitor interface */
2551 if (nl80211_create_monitor_interface(drv))
2554 if (nl80211_set_mode(drv, drv->iface, NL80211_IFTYPE_AP))
2557 if (hostapd_set_iface_flags(drv, drv->iface, 1))
2560 memset(&addr, 0, sizeof(addr));
2561 addr.sll_family = AF_PACKET;
2562 addr.sll_ifindex = ifr.ifr_ifindex;
2563 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
2566 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
2567 if (drv->eapol_sock < 0) {
2568 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
2572 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
2574 printf("Could not register read socket for eapol\n");
2578 memset(&ifr, 0, sizeof(ifr));
2579 os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
2580 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
2581 perror("ioctl(SIOCGIFHWADDR)");
2585 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
2586 printf("Invalid HW-addr family 0x%04x\n",
2587 ifr.ifr_hwaddr.sa_family);
2590 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
2595 nl80211_remove_iface(drv, drv->monitor_ifidx);
2600 static int i802_get_inact_sec(void *priv, const u8 *addr)
2602 struct hostap_sta_driver_data data;
2605 data.inactive_msec = (unsigned long) -1;
2606 ret = i802_read_sta_data(priv, &data, addr);
2607 if (ret || data.inactive_msec == (unsigned long) -1)
2609 return data.inactive_msec / 1000;
2613 static int i802_sta_clear_stats(void *priv, const u8 *addr)
2623 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
2626 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2628 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2631 pos = strstr(custom, "addr=");
2633 wpa_printf(MSG_DEBUG,
2634 "MLME-MICHAELMICFAILURE.indication "
2635 "without sender address ignored");
2639 if (hwaddr_aton(pos, addr) == 0) {
2640 hostapd_michael_mic_failure(drv->hapd, addr);
2642 wpa_printf(MSG_DEBUG,
2643 "MLME-MICHAELMICFAILURE.indication "
2644 "with invalid MAC address");
2650 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2651 char *data, int len)
2653 struct iw_event iwe_buf, *iwe = &iwe_buf;
2654 char *pos, *end, *custom, *buf;
2659 while (pos + IW_EV_LCP_LEN <= end) {
2660 /* Event data may be unaligned, so make a local, aligned copy
2661 * before processing. */
2662 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2663 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2664 iwe->cmd, iwe->len);
2665 if (iwe->len <= IW_EV_LCP_LEN)
2668 custom = pos + IW_EV_POINT_LEN;
2669 if (drv->we_version > 18 &&
2670 (iwe->cmd == IWEVMICHAELMICFAILURE ||
2671 iwe->cmd == IWEVCUSTOM)) {
2672 /* WE-19 removed the pointer from struct iw_point */
2673 char *dpos = (char *) &iwe_buf.u.data.length;
2674 int dlen = dpos - (char *) &iwe_buf;
2675 memcpy(dpos, pos + IW_EV_LCP_LEN,
2676 sizeof(struct iw_event) - dlen);
2678 memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2679 custom += IW_EV_POINT_OFF;
2684 if (custom + iwe->u.data.length > end)
2686 buf = malloc(iwe->u.data.length + 1);
2689 memcpy(buf, custom, iwe->u.data.length);
2690 buf[iwe->u.data.length] = '\0';
2691 hostapd_wireless_event_wireless_custom(drv, buf);
2701 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2702 struct nlmsghdr *h, int len)
2704 struct ifinfomsg *ifi;
2705 int attrlen, _nlmsg_len, rta_len;
2706 struct rtattr *attr;
2708 if (len < (int) sizeof(*ifi))
2711 ifi = NLMSG_DATA(h);
2713 /* TODO: use ifi->ifi_index to filter out wireless events from other
2716 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2718 attrlen = h->nlmsg_len - _nlmsg_len;
2722 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
2724 rta_len = RTA_ALIGN(sizeof(struct rtattr));
2725 while (RTA_OK(attr, attrlen)) {
2726 if (attr->rta_type == IFLA_WIRELESS) {
2727 hostapd_wireless_event_wireless(
2728 drv, ((char *) attr) + rta_len,
2729 attr->rta_len - rta_len);
2731 attr = RTA_NEXT(attr, attrlen);
2736 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2741 struct sockaddr_nl from;
2744 struct i802_driver_data *drv = eloop_ctx;
2746 fromlen = sizeof(from);
2747 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2748 (struct sockaddr *) &from, &fromlen);
2750 if (errno != EINTR && errno != EAGAIN)
2751 perror("recvfrom(netlink)");
2755 h = (struct nlmsghdr *) buf;
2756 while (left >= (int) sizeof(*h)) {
2760 plen = len - sizeof(*h);
2761 if (len > left || plen < 0) {
2762 printf("Malformed netlink message: "
2763 "len=%d left=%d plen=%d\n",
2768 switch (h->nlmsg_type) {
2770 hostapd_wireless_event_rtm_newlink(drv, h, plen);
2774 len = NLMSG_ALIGN(len);
2776 h = (struct nlmsghdr *) ((char *) h + len);
2780 printf("%d extra bytes in the end of netlink message\n", left);
2785 static int hostap_get_we_version(struct i802_driver_data *drv)
2787 struct iw_range *range;
2792 drv->we_version = 0;
2795 * Use larger buffer than struct iw_range in order to allow the
2796 * structure to grow in the future.
2798 buflen = sizeof(struct iw_range) + 500;
2799 range = os_zalloc(buflen);
2803 memset(&iwr, 0, sizeof(iwr));
2804 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2805 iwr.u.data.pointer = (caddr_t) range;
2806 iwr.u.data.length = buflen;
2808 minlen = ((char *) &range->enc_capa) - (char *) range +
2809 sizeof(range->enc_capa);
2811 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2812 perror("ioctl[SIOCGIWRANGE]");
2815 } else if (iwr.u.data.length >= minlen &&
2816 range->we_version_compiled >= 18) {
2817 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2818 "WE(source)=%d enc_capa=0x%x",
2819 range->we_version_compiled,
2820 range->we_version_source,
2822 drv->we_version = range->we_version_compiled;
2830 static int i802_wireless_event_init(struct i802_driver_data *drv)
2833 struct sockaddr_nl local;
2835 hostap_get_we_version(drv);
2837 drv->wext_sock = -1;
2839 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2841 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2845 memset(&local, 0, sizeof(local));
2846 local.nl_family = AF_NETLINK;
2847 local.nl_groups = RTMGRP_LINK;
2848 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2849 perror("bind(netlink)");
2854 eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2862 static void i802_wireless_event_deinit(struct i802_driver_data *drv)
2864 if (drv->wext_sock < 0)
2866 eloop_unregister_read_sock(drv->wext_sock);
2867 close(drv->wext_sock);
2871 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2873 struct i802_driver_data *drv = priv;
2874 struct ieee80211_mgmt mgmt;
2876 memset(&mgmt, 0, sizeof(mgmt));
2877 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2878 WLAN_FC_STYPE_DEAUTH);
2879 memcpy(mgmt.da, addr, ETH_ALEN);
2880 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2881 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2882 mgmt.u.deauth.reason_code = host_to_le16(reason);
2883 return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2884 sizeof(mgmt.u.deauth), 0);
2888 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2890 struct i802_driver_data *drv = priv;
2891 struct ieee80211_mgmt mgmt;
2893 memset(&mgmt, 0, sizeof(mgmt));
2894 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2895 WLAN_FC_STYPE_DISASSOC);
2896 memcpy(mgmt.da, addr, ETH_ALEN);
2897 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2898 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2899 mgmt.u.disassoc.reason_code = host_to_le16(reason);
2900 return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2901 sizeof(mgmt.u.disassoc), 0);
2905 static const struct hostapd_neighbor_bss *
2906 i802_get_neighbor_bss(void *priv, size_t *num)
2908 struct i802_driver_data *drv = priv;
2909 *num = drv->num_neighbors;
2910 return drv->neighbors;
2914 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2916 struct i802_driver_data *drv;
2918 drv = os_zalloc(sizeof(struct i802_driver_data));
2920 printf("Could not allocate memory for i802 driver data\n");
2925 memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2926 memcpy(drv->bss.iface, hapd->conf->iface, sizeof(drv->iface));
2928 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2929 drv->if_indices = drv->default_if_indices;
2930 drv->bridge = if_nametoindex(hapd->conf->bridge);
2931 drv->ht_40mhz_scan = hapd->iconf->secondary_channel != 0;
2933 if (i802_init_sockets(drv, bssid))
2936 if (i802_wireless_event_init(drv))
2947 static void *i802_init(struct hostapd_data *hapd)
2949 return i802_init_bssid(hapd, NULL);
2953 static void i802_deinit(void *priv)
2955 struct i802_driver_data *drv = priv;
2956 struct i802_bss *bss, *prev;
2958 i802_wireless_event_deinit(drv);
2960 if (drv->last_freq_ht) {
2961 /* Clear HT flags from the driver */
2962 struct hostapd_freq_params freq;
2963 os_memset(&freq, 0, sizeof(freq));
2964 freq.freq = drv->last_freq;
2965 i802_set_freq(priv, &freq);
2968 i802_del_beacon(drv);
2970 /* remove monitor interface */
2971 nl80211_remove_iface(drv, drv->monitor_ifidx);
2973 (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2975 if (drv->monitor_sock >= 0) {
2976 eloop_unregister_read_sock(drv->monitor_sock);
2977 close(drv->monitor_sock);
2979 if (drv->ioctl_sock >= 0)
2980 close(drv->ioctl_sock);
2981 if (drv->eapol_sock >= 0) {
2982 eloop_unregister_read_sock(drv->eapol_sock);
2983 close(drv->eapol_sock);
2986 genl_family_put(drv->nl80211);
2987 nl_cache_free(drv->nl_cache);
2988 nl_handle_destroy(drv->nl_handle);
2989 nl_cb_put(drv->nl_cb);
2991 if (drv->if_indices != drv->default_if_indices)
2992 free(drv->if_indices);
2994 os_free(drv->neighbors);
2996 bss = drv->bss.next;
3007 const struct hapd_driver_ops wpa_driver_nl80211_ops = {
3010 .init_bssid = i802_init_bssid,
3011 .deinit = i802_deinit,
3012 .set_ieee8021x = i802_set_ieee8021x,
3013 .set_privacy = i802_set_privacy,
3014 .set_key = i802_set_key,
3015 .get_seqnum = i802_get_seqnum,
3016 .flush = i802_flush,
3017 .read_sta_data = i802_read_sta_data,
3018 .send_eapol = i802_send_eapol,
3019 .sta_set_flags = i802_sta_set_flags,
3020 .sta_deauth = i802_sta_deauth,
3021 .sta_disassoc = i802_sta_disassoc,
3022 .sta_remove = i802_sta_remove,
3023 .send_mgmt_frame = i802_send_mgmt_frame,
3024 .sta_add = i802_sta_add,
3025 .get_inact_sec = i802_get_inact_sec,
3026 .sta_clear_stats = i802_sta_clear_stats,
3027 .set_freq = i802_set_freq,
3028 .set_rts = i802_set_rts,
3029 .set_frag = i802_set_frag,
3030 .set_retry = i802_set_retry,
3031 .set_rate_sets = i802_set_rate_sets,
3032 .set_beacon = i802_set_beacon,
3033 .set_internal_bridge = i802_set_internal_bridge,
3034 .set_beacon_int = i802_set_beacon_int,
3035 .set_cts_protect = i802_set_cts_protect,
3036 .set_preamble = i802_set_preamble,
3037 .set_short_slot_time = i802_set_short_slot_time,
3038 .set_tx_queue_params = i802_set_tx_queue_params,
3039 .bss_add = i802_bss_add,
3040 .bss_remove = i802_bss_remove,
3041 .if_add = i802_if_add,
3042 .if_update = i802_if_update,
3043 .if_remove = i802_if_remove,
3044 .get_hw_feature_data = i802_get_hw_feature_data,
3045 .set_sta_vlan = i802_set_sta_vlan,
3046 .set_country = i802_set_country,
3047 .get_neighbor_bss = i802_get_neighbor_bss,