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 ht_40mhz_scan:1;
90 struct hostapd_neighbor_bss *neighbors;
95 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
96 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
99 static struct i802_bss * get_bss(struct i802_driver_data *drv,
102 struct i802_bss *bss = &drv->bss;
104 if (os_strncmp(iface, bss->iface, IFNAMSIZ) == 0)
108 wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
113 static void add_ifidx(struct i802_driver_data *drv, int ifidx)
118 for (i = 0; i < drv->num_if_indices; i++) {
119 if (drv->if_indices[i] == 0) {
120 drv->if_indices[i] = ifidx;
125 if (drv->if_indices != drv->default_if_indices)
126 old = drv->if_indices;
130 drv->if_indices = realloc(old,
131 sizeof(int) * (drv->num_if_indices + 1));
132 if (!drv->if_indices) {
134 drv->if_indices = drv->default_if_indices;
136 drv->if_indices = old;
137 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
139 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
142 drv->if_indices[drv->num_if_indices] = ifidx;
143 drv->num_if_indices++;
147 static void del_ifidx(struct i802_driver_data *drv, int ifidx)
151 for (i = 0; i < drv->num_if_indices; i++) {
152 if (drv->if_indices[i] == ifidx) {
153 drv->if_indices[i] = 0;
160 static int have_ifidx(struct i802_driver_data *drv, int ifidx)
164 if (ifidx == drv->bridge)
167 for (i = 0; i < drv->num_if_indices; i++)
168 if (drv->if_indices[i] == ifidx)
176 static int ack_handler(struct nl_msg *msg, void *arg)
183 static int finish_handler(struct nl_msg *msg, void *arg)
190 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
198 static int send_and_recv_msgs(struct i802_driver_data *drv,
200 int (*valid_handler)(struct nl_msg *, void *),
206 cb = nl_cb_clone(drv->nl_cb);
210 err = nl_send_auto_complete(drv->nl_handle, msg);
216 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
217 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
218 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
221 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
222 valid_handler, valid_data);
225 nl_recvmsgs(drv->nl_handle, cb);
232 static int hostapd_set_iface_flags(struct i802_driver_data *drv,
233 const char *ifname, int dev_up)
237 if (drv->ioctl_sock < 0)
240 memset(&ifr, 0, sizeof(ifr));
241 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
243 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
244 perror("ioctl[SIOCGIFFLAGS]");
245 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
251 ifr.ifr_flags |= IFF_UP;
253 ifr.ifr_flags &= ~IFF_UP;
255 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
256 perror("ioctl[SIOCSIFFLAGS]");
264 static int nl_set_encr(int ifindex, struct i802_driver_data *drv,
265 wpa_alg alg, const u8 *addr, int idx, const u8 *key,
266 size_t key_len, int txkey)
275 if (alg == WPA_ALG_NONE) {
276 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
277 0, NL80211_CMD_DEL_KEY, 0);
279 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
280 0, NL80211_CMD_NEW_KEY, 0);
281 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
285 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
288 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
292 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
295 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
298 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
301 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
302 "algorithm %d", __func__, alg);
309 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
310 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
311 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
313 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
318 * If we failed or don't need to set the default TX key (below),
321 if (ret || !txkey || addr)
328 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
329 0, NL80211_CMD_SET_KEY, 0);
330 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
331 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
332 if (alg == WPA_ALG_IGTK)
333 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
335 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
337 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
346 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
347 const u8 *addr, int key_idx, int set_tx, const u8 *seq,
348 size_t seq_len, const u8 *key, size_t key_len)
350 struct i802_driver_data *drv = priv;
353 ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx, key,
362 static inline int min_int(int a, int b)
370 static int get_key_handler(struct nl_msg *msg, void *arg)
372 struct nlattr *tb[NL80211_ATTR_MAX + 1];
373 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
375 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
376 genlmsg_attrlen(gnlh, 0), NULL);
379 * TODO: validate the key index and mac address!
380 * Otherwise, there's a race condition as soon as
381 * the kernel starts sending key notifications.
384 if (tb[NL80211_ATTR_KEY_SEQ])
385 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
386 min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
391 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
394 struct i802_driver_data *drv = priv;
401 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
402 0, NL80211_CMD_GET_KEY, 0);
405 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
406 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
407 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
411 return send_and_recv_msgs(drv, msg, get_key_handler, seq);
417 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
420 struct i802_driver_data *drv = priv;
422 u8 rates[NL80211_MAX_SUPP_RATES];
430 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
431 NL80211_CMD_SET_BSS, 0);
433 for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
434 rates[rates_len++] = basic_rates[i] / 5;
436 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
438 /* TODO: multi-BSS support */
439 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
441 return send_and_recv_msgs(drv, msg, NULL, NULL);
447 static int i802_send_frame(void *priv, const void *data, size_t len,
448 int encrypt, int flags)
451 0x00, 0x00, /* radiotap version */
452 0x0e, 0x00, /* radiotap length */
453 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
454 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
456 0x00, 0x00, /* RX and TX flags to indicate that */
457 0x00, 0x00, /* this is the injected frame directly */
459 struct i802_driver_data *drv = priv;
460 struct iovec iov[2] = {
462 .iov_base = &rtap_hdr,
463 .iov_len = sizeof(rtap_hdr),
466 .iov_base = (void*)data,
470 struct msghdr msg = {
481 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
483 return sendmsg(drv->monitor_sock, &msg, flags);
486 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
489 struct ieee80211_mgmt *mgmt;
490 int do_not_encrypt = 0;
493 mgmt = (struct ieee80211_mgmt *) data;
494 fc = le_to_host16(mgmt->frame_control);
496 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
497 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
499 * Only one of the authentication frame types is encrypted.
500 * In order for static WEP encryption to work properly (i.e.,
501 * to not encrypt the frame), we need to tell mac80211 about
502 * the frames that must not be encrypted.
504 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
505 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
506 if (auth_alg == WLAN_AUTH_OPEN ||
507 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
511 return i802_send_frame(priv, data, len, !do_not_encrypt, flags);
514 /* Set kernel driver on given frequency (MHz) */
515 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
517 struct i802_driver_data *drv = priv;
524 drv->last_freq = freq->freq;
525 drv->last_freq_ht = freq->ht_enabled;
527 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
528 NL80211_CMD_SET_WIPHY, 0);
530 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
531 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
532 if (freq->ht_enabled) {
533 switch (freq->sec_channel_offset) {
535 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
536 NL80211_CHAN_HT40MINUS);
539 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
540 NL80211_CHAN_HT40PLUS);
543 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
549 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
556 static int i802_set_rts(void *priv, int rts)
558 struct i802_driver_data *drv = priv;
561 memset(&iwr, 0, sizeof(iwr));
562 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
563 iwr.u.rts.value = rts;
566 if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
567 perror("ioctl[SIOCSIWRTS]");
575 static int i802_set_frag(void *priv, int frag)
577 struct i802_driver_data *drv = priv;
580 memset(&iwr, 0, sizeof(iwr));
581 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
582 iwr.u.frag.value = frag;
583 iwr.u.frag.fixed = 1;
585 if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
586 perror("ioctl[SIOCSIWFRAG]");
594 static int i802_set_retry(void *priv, int short_retry, int long_retry)
596 struct i802_driver_data *drv = priv;
599 memset(&iwr, 0, sizeof(iwr));
600 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
602 iwr.u.retry.value = short_retry;
603 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
604 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
605 perror("ioctl[SIOCSIWRETRY(short)]");
609 iwr.u.retry.value = long_retry;
610 iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
611 if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
612 perror("ioctl[SIOCSIWRETRY(long)]");
620 static int i802_flush(void *priv)
622 struct i802_driver_data *drv = priv;
629 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
630 0, NL80211_CMD_DEL_STATION, 0);
633 * XXX: FIX! this needs to flush all VLANs too
635 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
636 if_nametoindex(drv->iface));
638 return send_and_recv_msgs(drv, msg, NULL, NULL);
644 static int get_sta_handler(struct nl_msg *msg, void *arg)
646 struct nlattr *tb[NL80211_ATTR_MAX + 1];
647 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
648 struct hostap_sta_driver_data *data = arg;
649 struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
650 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
651 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
652 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
653 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
654 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
655 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
658 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
659 genlmsg_attrlen(gnlh, 0), NULL);
662 * TODO: validate the interface and mac address!
663 * Otherwise, there's a race condition as soon as
664 * the kernel starts sending station notifications.
667 if (!tb[NL80211_ATTR_STA_INFO]) {
668 wpa_printf(MSG_DEBUG, "sta stats missing!");
671 if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
672 tb[NL80211_ATTR_STA_INFO],
674 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
678 if (stats[NL80211_STA_INFO_INACTIVE_TIME])
679 data->inactive_msec =
680 nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
681 if (stats[NL80211_STA_INFO_RX_BYTES])
682 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
683 if (stats[NL80211_STA_INFO_TX_BYTES])
684 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
685 if (stats[NL80211_STA_INFO_RX_PACKETS])
687 nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
688 if (stats[NL80211_STA_INFO_TX_PACKETS])
690 nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
695 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
698 struct i802_driver_data *drv = priv;
701 os_memset(data, 0, sizeof(*data));
706 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
707 0, NL80211_CMD_GET_STATION, 0);
709 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
710 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
712 return send_and_recv_msgs(drv, msg, get_sta_handler, data);
718 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
719 size_t data_len, int encrypt, const u8 *own_addr)
721 struct i802_driver_data *drv = priv;
722 struct ieee80211_hdr *hdr;
727 int qos = sta->flags & WLAN_STA_WME;
732 len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
734 hdr = os_zalloc(len);
736 printf("malloc() failed for i802_send_data(len=%lu)\n",
737 (unsigned long) len);
742 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
743 hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
745 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
746 #if 0 /* To be enabled if qos determination is added above */
748 hdr->frame_control |=
749 host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
753 memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
754 memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
755 memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
756 pos = (u8 *) (hdr + 1);
758 #if 0 /* To be enabled if qos determination is added above */
760 /* add an empty QoS header if needed */
767 memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
768 pos += sizeof(rfc1042_header);
769 WPA_PUT_BE16(pos, ETH_P_PAE);
771 memcpy(pos, data, data_len);
773 res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
777 perror("i802_send_eapol: send");
778 printf("i802_send_eapol - packet len: %lu - failed\n",
779 (unsigned long) len);
786 static int i802_sta_add(const char *ifname, void *priv,
787 struct hostapd_sta_add_params *params)
789 struct i802_driver_data *drv = priv;
797 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
798 0, NL80211_CMD_NEW_STATION, 0);
800 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
801 if_nametoindex(drv->iface));
802 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
803 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
804 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
806 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
807 params->listen_interval);
809 #ifdef CONFIG_IEEE80211N
810 if (params->ht_capabilities) {
811 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
812 params->ht_capabilities->length,
813 ¶ms->ht_capabilities->data);
815 #endif /* CONFIG_IEEE80211N */
817 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
819 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
820 "result: %d (%s)", ret, strerror(-ret));
828 static int i802_sta_remove(void *priv, const u8 *addr)
830 struct i802_driver_data *drv = priv;
838 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
839 0, NL80211_CMD_DEL_STATION, 0);
841 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
842 if_nametoindex(drv->iface));
843 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
845 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
854 static int i802_sta_set_flags(void *priv, const u8 *addr,
855 int total_flags, int flags_or, int flags_and)
857 struct i802_driver_data *drv = priv;
858 struct nl_msg *msg, *flags = NULL;
864 flags = nlmsg_alloc();
870 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
871 0, NL80211_CMD_SET_STATION, 0);
873 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
874 if_nametoindex(drv->iface));
875 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
877 if (total_flags & WLAN_STA_AUTHORIZED)
878 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
880 if (total_flags & WLAN_STA_WMM)
881 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
883 if (total_flags & WLAN_STA_SHORT_PREAMBLE)
884 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
886 if (total_flags & WLAN_STA_MFP)
887 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
889 if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
890 goto nla_put_failure;
894 return send_and_recv_msgs(drv, msg, NULL, NULL);
901 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
902 int cw_min, int cw_max, int burst_time)
904 struct i802_driver_data *drv = priv;
906 struct nlattr *txq, *params;
912 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
913 0, NL80211_CMD_SET_WIPHY, 0);
915 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
917 txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
919 goto nla_put_failure;
921 /* We are only sending parameters for a single TXQ at a time */
922 params = nla_nest_start(msg, 1);
924 goto nla_put_failure;
926 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
927 /* Burst time is configured in units of 0.1 msec and TXOP parameter in
928 * 32 usec, so need to convert the value here. */
929 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
930 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
931 NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
932 NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
934 nla_nest_end(msg, params);
936 nla_nest_end(msg, txq);
938 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
945 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
949 /* stop listening for EAPOL on this interface */
950 del_ifidx(drv, ifidx);
954 goto nla_put_failure;
956 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
957 0, NL80211_CMD_DEL_INTERFACE, 0);
958 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
960 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
963 printf("Failed to remove interface.\n");
967 static int nl80211_create_iface(struct i802_driver_data *drv,
969 enum nl80211_iftype iftype,
972 struct nl_msg *msg, *flags = NULL;
982 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
983 0, NL80211_CMD_NEW_INTERFACE, 0);
984 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
985 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
986 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
988 if (iftype == NL80211_IFTYPE_MONITOR) {
991 flags = nlmsg_alloc();
993 goto nla_put_failure;
995 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
997 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1002 goto nla_put_failure;
1005 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1008 printf("Failed to create interface %s.\n", ifname);
1012 ifidx = if_nametoindex(ifname);
1017 /* start listening for EAPOL on this interface */
1018 add_ifidx(drv, ifidx);
1022 case NL80211_IFTYPE_AP:
1023 os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1024 memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1025 ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1027 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1028 nl80211_remove_iface(drv, ifidx);
1032 case NL80211_IFTYPE_WDS:
1033 memset(&iwr, 0, sizeof(iwr));
1034 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1035 iwr.u.addr.sa_family = ARPHRD_ETHER;
1036 memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1037 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1050 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1052 struct i802_driver_data *drv = priv;
1054 struct i802_bss *bss;
1056 bss = os_zalloc(sizeof(*bss));
1059 os_strlcpy(bss->iface, ifname, IFNAMSIZ);
1061 ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1066 if (hostapd_set_iface_flags(priv, ifname, 1)) {
1067 nl80211_remove_iface(priv, ifidx);
1071 bss->next = drv->bss.next;
1072 drv->bss.next = bss;
1077 static int i802_bss_remove(void *priv, const char *ifname)
1079 struct i802_driver_data *drv = priv;
1080 struct i802_bss *bss, *prev;
1081 nl80211_remove_iface(priv, if_nametoindex(ifname));
1083 bss = drv->bss.next;
1085 if (os_strncmp(ifname, bss->iface, IFNAMSIZ) == 0) {
1086 prev->next = bss->next;
1097 static int i802_set_beacon(const char *iface, void *priv,
1098 const u8 *head, size_t head_len,
1099 const u8 *tail, size_t tail_len, int dtim_period)
1101 struct i802_driver_data *drv = priv;
1103 u8 cmd = NL80211_CMD_NEW_BEACON;
1105 struct i802_bss *bss;
1107 bss = get_bss(drv, iface);
1111 msg = nlmsg_alloc();
1115 wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
1116 iface, bss->beacon_set);
1117 if (bss->beacon_set)
1118 cmd = NL80211_CMD_SET_BEACON;
1120 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1122 NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1123 NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1124 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1125 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1126 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
1128 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1130 bss->beacon_set = 1;
1137 static int i802_del_beacon(struct i802_driver_data *drv)
1141 msg = nlmsg_alloc();
1145 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1146 0, NL80211_CMD_DEL_BEACON, 0);
1147 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1149 return send_and_recv_msgs(drv, msg, NULL, NULL);
1155 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1157 struct i802_driver_data *drv = priv;
1160 memset(&iwr, 0, sizeof(iwr));
1162 os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1163 iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1164 iwr.u.param.value = enabled;
1166 ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1168 /* ignore errors, the kernel/driver might not care */
1173 static int i802_set_internal_bridge(void *priv, int value)
1179 static int i802_set_beacon_int(void *priv, int value)
1181 struct i802_driver_data *drv = priv;
1184 drv->beacon_int = value;
1186 if (!drv->bss.beacon_set)
1189 msg = nlmsg_alloc();
1193 wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
1194 "(beacon_set=%d)", value, drv->bss.beacon_set);
1195 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1196 0, NL80211_CMD_SET_BEACON, 0);
1197 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1199 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1201 return send_and_recv_msgs(drv, msg, NULL, NULL);
1207 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1209 struct i802_driver_data *drv = priv;
1212 msg = nlmsg_alloc();
1216 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1217 NL80211_CMD_SET_BSS, 0);
1220 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1222 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1224 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1226 /* TODO: multi-BSS support */
1227 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1229 return send_and_recv_msgs(drv, msg, NULL, NULL);
1235 static int i802_set_cts_protect(void *priv, int value)
1237 return i802_set_bss(priv, value, -1, -1);
1241 static int i802_set_preamble(void *priv, int value)
1243 return i802_set_bss(priv, -1, value, -1);
1247 static int i802_set_short_slot_time(void *priv, int value)
1249 return i802_set_bss(priv, -1, -1, value);
1253 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1256 case HOSTAPD_IF_VLAN:
1257 return NL80211_IFTYPE_AP_VLAN;
1258 case HOSTAPD_IF_WDS:
1259 return NL80211_IFTYPE_WDS;
1265 static int i802_if_add(const char *iface, void *priv,
1266 enum hostapd_driver_if_type type, char *ifname,
1269 if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1275 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1276 char *ifname, const u8 *addr)
1278 /* unused at the moment */
1283 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1284 const char *ifname, const u8 *addr)
1286 nl80211_remove_iface(priv, if_nametoindex(ifname));
1291 struct phy_info_arg {
1293 struct hostapd_hw_modes *modes;
1296 static int phy_info_handler(struct nl_msg *msg, void *arg)
1298 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1299 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1300 struct phy_info_arg *phy_info = arg;
1302 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1304 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1305 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1306 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1307 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1308 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1309 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1310 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1311 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1314 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1315 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1316 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1317 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1320 struct nlattr *nl_band;
1321 struct nlattr *nl_freq;
1322 struct nlattr *nl_rate;
1323 int rem_band, rem_freq, rem_rate;
1324 struct hostapd_hw_modes *mode;
1325 int idx, mode_is_set;
1327 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1328 genlmsg_attrlen(gnlh, 0), NULL);
1330 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1333 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1334 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1337 phy_info->modes = mode;
1341 mode = &phy_info->modes[*(phy_info->num_modes)];
1342 memset(mode, 0, sizeof(*mode));
1343 *(phy_info->num_modes) += 1;
1345 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1346 nla_len(nl_band), NULL);
1348 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1349 mode->ht_capab = nla_get_u16(
1350 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1353 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1354 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1355 nla_len(nl_freq), freq_policy);
1356 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1358 mode->num_channels++;
1361 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1362 if (!mode->channels)
1367 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1368 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1369 nla_len(nl_freq), freq_policy);
1370 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1373 mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1374 mode->channels[idx].flag = 0;
1377 /* crude heuristic */
1378 if (mode->channels[idx].freq < 4000)
1379 mode->mode = HOSTAPD_MODE_IEEE80211B;
1381 mode->mode = HOSTAPD_MODE_IEEE80211A;
1385 /* crude heuristic */
1386 if (mode->channels[idx].freq < 4000)
1387 if (mode->channels[idx].freq == 2848)
1388 mode->channels[idx].chan = 14;
1390 mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1392 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1394 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1395 mode->channels[idx].flag |=
1396 HOSTAPD_CHAN_DISABLED;
1397 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1398 mode->channels[idx].flag |=
1399 HOSTAPD_CHAN_PASSIVE_SCAN;
1400 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1401 mode->channels[idx].flag |=
1402 HOSTAPD_CHAN_NO_IBSS;
1403 if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1404 mode->channels[idx].flag |=
1407 if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1408 !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1409 mode->channels[idx].max_tx_power =
1410 nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1415 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1416 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1417 nla_len(nl_rate), rate_policy);
1418 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1423 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1429 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1430 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1431 nla_len(nl_rate), rate_policy);
1432 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1434 mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1436 /* crude heuristic */
1437 if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1438 mode->rates[idx].rate > 200)
1439 mode->mode = HOSTAPD_MODE_IEEE80211G;
1441 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1442 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1451 static struct hostapd_hw_modes *i802_add_11b(struct hostapd_hw_modes *modes,
1455 struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1456 int i, mode11g_idx = -1;
1458 /* If only 802.11g mode is included, use it to construct matching
1459 * 802.11b mode data. */
1461 for (m = 0; m < *num_modes; m++) {
1462 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1463 return modes; /* 802.11b already included */
1464 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1468 if (mode11g_idx < 0)
1469 return modes; /* 2.4 GHz band not supported at all */
1471 nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1473 return modes; /* Could not add 802.11b mode */
1475 mode = &nmodes[*num_modes];
1476 os_memset(mode, 0, sizeof(*mode));
1480 mode->mode = HOSTAPD_MODE_IEEE80211B;
1482 mode11g = &modes[mode11g_idx];
1483 mode->num_channels = mode11g->num_channels;
1484 mode->channels = os_malloc(mode11g->num_channels *
1485 sizeof(struct hostapd_channel_data));
1486 if (mode->channels == NULL) {
1488 return modes; /* Could not add 802.11b mode */
1490 os_memcpy(mode->channels, mode11g->channels,
1491 mode11g->num_channels * sizeof(struct hostapd_channel_data));
1493 mode->num_rates = 0;
1494 mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1495 if (mode->rates == NULL) {
1496 os_free(mode->channels);
1498 return modes; /* Could not add 802.11b mode */
1501 for (i = 0; i < mode11g->num_rates; i++) {
1502 if (mode11g->rates[i].rate > 110 ||
1503 mode11g->rates[i].flags &
1504 (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1506 mode->rates[mode->num_rates] = mode11g->rates[i];
1508 if (mode->num_rates == 4)
1512 if (mode->num_rates == 0) {
1513 os_free(mode->channels);
1514 os_free(mode->rates);
1516 return modes; /* No 802.11b rates */
1519 wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1525 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1529 struct i802_driver_data *drv = priv;
1531 struct phy_info_arg result = {
1532 .num_modes = num_modes,
1539 msg = nlmsg_alloc();
1543 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1544 0, NL80211_CMD_GET_WIPHY, 0);
1546 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1548 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1549 return i802_add_11b(result.modes, num_modes);
1555 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1556 const char *ifname, int vlan_id)
1558 struct i802_driver_data *drv = priv;
1561 msg = nlmsg_alloc();
1565 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1566 0, NL80211_CMD_SET_STATION, 0);
1568 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1569 if_nametoindex(drv->iface));
1570 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1571 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1572 if_nametoindex(ifname));
1574 return send_and_recv_msgs(drv, msg, NULL, NULL);
1580 static int i802_set_country(void *priv, const char *country)
1582 struct i802_driver_data *drv = priv;
1586 msg = nlmsg_alloc();
1590 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1591 0, NL80211_CMD_REQ_SET_REG, 0);
1593 alpha2[0] = country[0];
1594 alpha2[1] = country[1];
1596 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1598 return send_and_recv_msgs(drv, msg, NULL, NULL);
1604 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1607 struct ieee80211_hdr *hdr;
1608 u16 fc, type, stype;
1610 hdr = (struct ieee80211_hdr *) buf;
1611 fc = le_to_host16(hdr->frame_control);
1613 type = WLAN_FC_GET_TYPE(fc);
1614 stype = WLAN_FC_GET_STYPE(fc);
1617 case WLAN_FC_TYPE_MGMT:
1618 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1619 ok ? "ACK" : "fail");
1620 hostapd_mgmt_tx_cb(hapd, buf, len, stype, ok);
1622 case WLAN_FC_TYPE_CTRL:
1623 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1624 ok ? "ACK" : "fail");
1626 case WLAN_FC_TYPE_DATA:
1627 hostapd_tx_status(hapd, hdr->addr1, buf, len, ok);
1630 printf("unknown TX callback frame type %d\n", type);
1636 static void handle_frame(struct i802_driver_data *drv,
1637 struct hostapd_iface *iface, u8 *buf, size_t len,
1638 struct hostapd_frame_info *hfi,
1639 enum ieee80211_msg_type msg_type)
1641 struct ieee80211_hdr *hdr;
1642 u16 fc, type, stype;
1643 size_t data_len = len;
1644 struct hostapd_data *hapd = NULL;
1645 int broadcast_bssid = 0;
1650 * PS-Poll frames are 16 bytes. All other frames are
1651 * 24 bytes or longer.
1656 hdr = (struct ieee80211_hdr *) buf;
1657 fc = le_to_host16(hdr->frame_control);
1659 type = WLAN_FC_GET_TYPE(fc);
1660 stype = WLAN_FC_GET_STYPE(fc);
1663 case WLAN_FC_TYPE_DATA:
1666 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1670 case WLAN_FC_FROMDS:
1678 case WLAN_FC_TYPE_CTRL:
1679 /* discard non-ps-poll frames */
1680 if (stype != WLAN_FC_STYPE_PSPOLL)
1684 case WLAN_FC_TYPE_MGMT:
1692 /* find interface frame belongs to */
1693 for (i = 0; i < iface->num_bss; i++) {
1694 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1695 hapd = iface->bss[i];
1701 hapd = iface->bss[0];
1703 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1704 bssid[2] != 0xff || bssid[3] != 0xff ||
1705 bssid[4] != 0xff || bssid[5] != 0xff) {
1707 * Unknown BSSID - drop frame if this is not from
1708 * passive scanning or a beacon (at least ProbeReq
1709 * frames to other APs may be allowed through RX
1710 * filtering in the wlan hw/driver)
1712 if ((type != WLAN_FC_TYPE_MGMT ||
1713 stype != WLAN_FC_STYPE_BEACON))
1716 broadcast_bssid = 1;
1720 case ieee80211_msg_normal:
1721 /* continue processing */
1723 case ieee80211_msg_tx_callback_ack:
1724 handle_tx_callback(hapd, buf, data_len, 1);
1726 case ieee80211_msg_tx_callback_fail:
1727 handle_tx_callback(hapd, buf, data_len, 0);
1732 case WLAN_FC_TYPE_MGMT:
1733 if (stype != WLAN_FC_STYPE_BEACON &&
1734 stype != WLAN_FC_STYPE_PROBE_REQ)
1735 wpa_printf(MSG_MSGDUMP, "MGMT");
1736 if (broadcast_bssid) {
1737 for (i = 0; i < iface->num_bss; i++)
1738 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
1741 hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
1743 case WLAN_FC_TYPE_CTRL:
1744 /* can only get here with PS-Poll frames */
1745 wpa_printf(MSG_DEBUG, "CTRL");
1746 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
1748 case WLAN_FC_TYPE_DATA:
1749 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
1755 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1757 struct i802_driver_data *drv = eloop_ctx;
1758 struct hostapd_data *hapd = drv->hapd;
1759 struct sockaddr_ll lladdr;
1760 unsigned char buf[3000];
1762 socklen_t fromlen = sizeof(lladdr);
1764 len = recvfrom(sock, buf, sizeof(buf), 0,
1765 (struct sockaddr *)&lladdr, &fromlen);
1771 if (have_ifidx(drv, lladdr.sll_ifindex))
1772 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
1776 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1778 struct i802_driver_data *drv = eloop_ctx;
1780 unsigned char buf[3000];
1781 struct hostapd_data *hapd = drv->hapd;
1782 struct ieee80211_radiotap_iterator iter;
1784 struct hostapd_frame_info hfi;
1785 int injected = 0, failed = 0, msg_type, rxflags = 0;
1787 len = recv(sock, buf, sizeof(buf), 0);
1793 if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1794 printf("received invalid radiotap frame\n");
1798 memset(&hfi, 0, sizeof(hfi));
1801 ret = ieee80211_radiotap_iterator_next(&iter);
1805 printf("received invalid radiotap frame (%d)\n", ret);
1808 switch (iter.this_arg_index) {
1809 case IEEE80211_RADIOTAP_FLAGS:
1810 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1813 case IEEE80211_RADIOTAP_RX_FLAGS:
1816 case IEEE80211_RADIOTAP_TX_FLAGS:
1818 failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1819 IEEE80211_RADIOTAP_F_TX_FAIL;
1821 case IEEE80211_RADIOTAP_DATA_RETRIES:
1823 case IEEE80211_RADIOTAP_CHANNEL:
1824 /* TODO convert from freq/flags to channel number
1829 case IEEE80211_RADIOTAP_RATE:
1830 hfi.datarate = *iter.this_arg * 5;
1832 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1833 hfi.ssi_signal = *iter.this_arg;
1838 if (rxflags && injected)
1842 msg_type = ieee80211_msg_normal;
1844 msg_type = ieee80211_msg_tx_callback_fail;
1846 msg_type = ieee80211_msg_tx_callback_ack;
1848 handle_frame(drv, hapd->iface, buf + iter.max_length,
1849 len - iter.max_length, &hfi, msg_type);
1854 * we post-process the filter code later and rewrite
1855 * this to the offset to the last instruction
1860 static struct sock_filter msock_filter_insns[] = {
1862 * do a little-endian load of the radiotap length field
1864 /* load lower byte into A */
1865 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
1866 /* put it into X (== index register) */
1867 BPF_STMT(BPF_MISC| BPF_TAX, 0),
1868 /* load upper byte into A */
1869 BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
1870 /* left-shift it by 8 */
1871 BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
1873 BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
1874 /* put result into X */
1875 BPF_STMT(BPF_MISC| BPF_TAX, 0),
1878 * Allow management frames through, this also gives us those
1879 * management frames that we sent ourselves with status
1881 /* load the lower byte of the IEEE 802.11 frame control field */
1882 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
1883 /* mask off frame type and version */
1884 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
1885 /* accept frame if it's both 0, fall through otherwise */
1886 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
1889 * TODO: add a bit to radiotap RX flags that indicates
1890 * that the sending station is not associated, then
1891 * add a filter here that filters on our DA and that flag
1892 * to allow us to deauth frames to that bad station.
1894 * Not a regression -- we didn't do it before either.
1899 * drop non-data frames, WDS frames
1901 /* load the lower byte of the frame control field */
1902 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
1903 /* mask off QoS bit */
1904 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
1905 /* drop non-data frames */
1906 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
1907 /* load the upper byte of the frame control field */
1908 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
1909 /* mask off toDS/fromDS */
1910 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
1911 /* drop WDS frames */
1912 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
1916 * add header length to index
1918 /* load the lower byte of the frame control field */
1919 BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
1920 /* mask off QoS bit */
1921 BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
1922 /* right shift it by 6 to give 0 or 2 */
1923 BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
1924 /* add data frame header length */
1925 BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
1926 /* add index, was start of 802.11 header */
1927 BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
1928 /* move to index, now start of LL header */
1929 BPF_STMT(BPF_MISC | BPF_TAX, 0),
1932 * Accept empty data frames, we use those for
1935 BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
1936 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
1939 * Accept EAPOL frames
1941 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
1942 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
1943 BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
1944 BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
1946 /* keep these last two statements or change the code below */
1947 /* return 0 == "DROP" */
1948 BPF_STMT(BPF_RET | BPF_K, 0),
1949 /* return ~0 == "keep all" */
1950 BPF_STMT(BPF_RET | BPF_K, ~0),
1953 static struct sock_fprog msock_filter = {
1954 .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
1955 .filter = msock_filter_insns,
1959 static int add_monitor_filter(int s)
1963 /* rewrite all PASS/FAIL jump offsets */
1964 for (idx = 0; idx < msock_filter.len; idx++) {
1965 struct sock_filter *insn = &msock_filter_insns[idx];
1967 if (BPF_CLASS(insn->code) == BPF_JMP) {
1968 if (insn->code == (BPF_JMP|BPF_JA)) {
1969 if (insn->k == PASS)
1970 insn->k = msock_filter.len - idx - 2;
1971 else if (insn->k == FAIL)
1972 insn->k = msock_filter.len - idx - 3;
1975 if (insn->jt == PASS)
1976 insn->jt = msock_filter.len - idx - 2;
1977 else if (insn->jt == FAIL)
1978 insn->jt = msock_filter.len - idx - 3;
1980 if (insn->jf == PASS)
1981 insn->jf = msock_filter.len - idx - 2;
1982 else if (insn->jf == FAIL)
1983 insn->jf = msock_filter.len - idx - 3;
1987 if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
1988 &msock_filter, sizeof(msock_filter))) {
1989 perror("SO_ATTACH_FILTER");
1997 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
2000 struct sockaddr_ll ll;
2004 snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
2005 buf[IFNAMSIZ - 1] = '\0';
2007 drv->monitor_ifidx =
2008 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2010 if (drv->monitor_ifidx < 0)
2013 if (hostapd_set_iface_flags(drv, buf, 1))
2016 memset(&ll, 0, sizeof(ll));
2017 ll.sll_family = AF_PACKET;
2018 ll.sll_ifindex = drv->monitor_ifidx;
2019 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2020 if (drv->monitor_sock < 0) {
2021 perror("socket[PF_PACKET,SOCK_RAW]");
2025 if (add_monitor_filter(drv->monitor_sock)) {
2026 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2027 "interface; do filtering in user space");
2028 /* This works, but will cost in performance. */
2031 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
2033 perror("monitor socket bind");
2037 optlen = sizeof(optval);
2040 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2041 perror("Failed to set socket priority");
2045 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2047 printf("Could not register monitor read socket\n");
2053 nl80211_remove_iface(drv, drv->monitor_ifidx);
2058 static int nl80211_set_mode(struct i802_driver_data *drv, const char *ifname,
2064 msg = nlmsg_alloc();
2068 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2069 0, NL80211_CMD_SET_INTERFACE, 0);
2070 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2071 if_nametoindex(ifname));
2072 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
2074 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2078 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
2084 #ifdef CONFIG_IEEE80211N
2085 static void i802_add_neighbor(struct i802_driver_data *drv, u8 *bssid,
2086 int freq, u8 *ie, size_t ie_len)
2088 struct ieee802_11_elems elems;
2089 int ht, pri_chan = 0, sec_chan = 0;
2090 struct ieee80211_ht_operation *oper;
2091 struct hostapd_neighbor_bss *nnei;
2093 ieee802_11_parse_elems(ie, ie_len, &elems, 0);
2094 ht = elems.ht_capabilities || elems.ht_operation;
2095 if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
2096 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
2097 pri_chan = oper->control_chan;
2098 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
2099 if (oper->ht_param &
2100 HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
2101 sec_chan = pri_chan + 4;
2102 else if (oper->ht_param &
2103 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
2104 sec_chan = pri_chan - 4;
2108 wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
2109 " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
2110 MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
2112 nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
2113 sizeof(struct hostapd_neighbor_bss));
2116 drv->neighbors = nnei;
2117 nnei = &nnei[drv->num_neighbors];
2118 os_memcpy(nnei->bssid, bssid, ETH_ALEN);
2121 nnei->pri_chan = pri_chan;
2122 nnei->sec_chan = sec_chan;
2123 drv->num_neighbors++;
2127 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
2129 int divi = 1000000, i;
2131 if (iwe->u.freq.e == 0) {
2133 * Some drivers do not report frequency, but a channel.
2134 * Try to map this to frequency by assuming they are using
2135 * IEEE 802.11b/g. But don't overwrite a previously parsed
2136 * frequency if the driver sends both frequency and channel,
2137 * since the driver may be sending an A-band channel that we
2138 * don't handle here.
2144 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
2145 *freq = 2407 + 5 * iwe->u.freq.m;
2147 } else if (iwe->u.freq.m == 14) {
2153 if (iwe->u.freq.e > 6) {
2154 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
2155 "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
2159 for (i = 0; i < iwe->u.freq.e; i++)
2161 *freq = iwe->u.freq.m / divi;
2166 static int i802_parse_scan(struct i802_driver_data *drv, u8 *res_buf,
2171 struct iw_event iwe_buf, *iwe = &iwe_buf;
2172 char *pos, *end, *custom;
2181 pos = (char *) res_buf;
2182 end = (char *) res_buf + len;
2184 while (pos + IW_EV_LCP_LEN <= end) {
2185 /* Event data may be unaligned, so make a local, aligned copy
2186 * before processing. */
2187 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2188 if (iwe->len <= IW_EV_LCP_LEN)
2191 custom = pos + IW_EV_POINT_LEN;
2192 if (iwe->cmd == IWEVGENIE) {
2193 /* WE-19 removed the pointer from struct iw_point */
2194 char *dpos = (char *) &iwe_buf.u.data.length;
2195 int dlen = dpos - (char *) &iwe_buf;
2196 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
2197 sizeof(struct iw_event) - dlen);
2199 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2200 custom += IW_EV_POINT_OFF;
2206 i802_add_neighbor(drv, bssid, freq, ie,
2209 os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
2215 i802_get_scan_freq(iwe, &freq);
2218 if (custom + iwe->u.data.length > end) {
2219 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
2223 ie_len = iwe->u.data.length;
2231 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
2237 static int i802_get_ht_scan_res(struct i802_driver_data *drv)
2244 res_buf_len = IW_SCAN_MAX_DATA;
2246 res_buf = os_malloc(res_buf_len);
2247 if (res_buf == NULL)
2249 os_memset(&iwr, 0, sizeof(iwr));
2250 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2251 iwr.u.data.pointer = res_buf;
2252 iwr.u.data.length = res_buf_len;
2254 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
2257 if (errno == E2BIG && res_buf_len < 65535) {
2261 if (res_buf_len > 65535)
2262 res_buf_len = 65535; /* 16-bit length field */
2263 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
2264 "trying larger buffer (%lu bytes)",
2265 (unsigned long) res_buf_len);
2267 perror("ioctl[SIOCGIWSCAN]");
2273 if (iwr.u.data.length > res_buf_len) {
2278 res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
2285 static int i802_is_event_wireless_scan_complete(char *data, int len)
2287 struct iw_event iwe_buf, *iwe = &iwe_buf;
2293 while (pos + IW_EV_LCP_LEN <= end) {
2294 /* Event data may be unaligned, so make a local, aligned copy
2295 * before processing. */
2296 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2297 if (iwe->cmd == SIOCGIWSCAN)
2307 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
2309 struct ifinfomsg *ifi;
2310 int attrlen, _nlmsg_len, rta_len;
2311 struct rtattr *attr;
2313 if (len < (int) sizeof(*ifi))
2316 ifi = NLMSG_DATA(h);
2318 if (ifindex != ifi->ifi_index)
2319 return 0; /* event for foreign ifindex */
2321 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2323 attrlen = h->nlmsg_len - _nlmsg_len;
2327 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
2329 rta_len = RTA_ALIGN(sizeof(struct rtattr));
2330 while (RTA_OK(attr, attrlen)) {
2331 if (attr->rta_type == IFLA_WIRELESS &&
2332 i802_is_event_wireless_scan_complete(
2333 ((char *) attr) + rta_len,
2334 attr->rta_len - rta_len))
2336 attr = RTA_NEXT(attr, attrlen);
2343 static int i802_is_scan_complete(int s, int ifindex)
2349 left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
2351 perror("recv(netlink)");
2355 h = (struct nlmsghdr *) buf;
2356 while (left >= (int) sizeof(*h)) {
2360 plen = len - sizeof(*h);
2361 if (len > left || plen < 0) {
2362 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
2363 "len=%d left=%d plen=%d",
2368 switch (h->nlmsg_type) {
2370 if (i802_is_rtm_scan_complete(ifindex, h, plen))
2375 len = NLMSG_ALIGN(len);
2377 h = (struct nlmsghdr *) ((char *) h + len);
2384 static int i802_ht_scan(struct i802_driver_data *drv)
2387 int s, res, ifindex;
2388 struct sockaddr_nl local;
2393 wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
2394 "starting HT 20/40 MHz BSS");
2396 /* Request a new scan */
2397 /* TODO: would be enough to scan the selected band */
2398 os_memset(&iwr, 0, sizeof(iwr));
2399 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2400 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
2401 perror("ioctl[SIOCSIWSCAN]");
2405 ifindex = if_nametoindex(drv->iface);
2407 /* Wait for scan completion event or timeout */
2408 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2410 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2414 os_memset(&local, 0, sizeof(local));
2415 local.nl_family = AF_NETLINK;
2416 local.nl_groups = RTMGRP_LINK;
2417 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2418 perror("bind(netlink)");
2424 end += 30; /* Wait at most 30 seconds for scan results */
2427 tv.tv_sec = end > now ? end - now : 0;
2431 res = select(s + 1, &rfds, NULL, NULL, &tv);
2434 /* Assume results are ready after 10 seconds wait */
2438 if (i802_is_scan_complete(s, ifindex)) {
2439 wpa_printf(MSG_DEBUG, "nl80211: Scan "
2444 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
2445 /* Assume results are ready to be read now */
2452 return i802_get_ht_scan_res(drv);
2454 #endif /* CONFIG_IEEE80211N */
2457 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
2460 struct sockaddr_ll addr;
2462 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
2463 if (drv->ioctl_sock < 0) {
2464 perror("socket[PF_INET,SOCK_DGRAM]");
2468 /* start listening for EAPOL on the default AP interface */
2469 add_ifidx(drv, if_nametoindex(drv->iface));
2471 if (hostapd_set_iface_flags(drv, drv->iface, 0))
2475 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
2476 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
2477 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2479 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
2480 perror("ioctl(SIOCSIFHWADDR)");
2486 * initialise generic netlink and nl80211
2488 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
2490 printf("Failed to allocate netlink callbacks.\n");
2494 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
2495 if (!drv->nl_handle) {
2496 printf("Failed to allocate netlink handle.\n");
2500 if (genl_connect(drv->nl_handle)) {
2501 printf("Failed to connect to generic netlink.\n");
2505 #ifdef CONFIG_LIBNL20
2506 if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
2507 printf("Failed to allocate generic netlink cache.\n");
2510 #else /* CONFIG_LIBNL20 */
2511 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
2512 if (!drv->nl_cache) {
2513 printf("Failed to allocate generic netlink cache.\n");
2516 #endif /* CONFIG_LIBNL20 */
2518 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
2519 if (!drv->nl80211) {
2520 printf("nl80211 not found.\n");
2524 #ifdef CONFIG_IEEE80211N
2525 if (drv->ht_40mhz_scan) {
2526 if (nl80211_set_mode(drv, drv->iface, NL80211_IFTYPE_STATION)
2527 || hostapd_set_iface_flags(drv, drv->iface, 1) ||
2528 i802_ht_scan(drv) ||
2529 hostapd_set_iface_flags(drv, drv->iface, 0)) {
2530 wpa_printf(MSG_ERROR, "Failed to scan channels for "
2531 "HT 40 MHz operations");
2535 #endif /* CONFIG_IEEE80211N */
2537 /* Initialise a monitor interface */
2538 if (nl80211_create_monitor_interface(drv))
2541 if (nl80211_set_mode(drv, drv->iface, NL80211_IFTYPE_AP))
2544 if (hostapd_set_iface_flags(drv, drv->iface, 1))
2547 memset(&addr, 0, sizeof(addr));
2548 addr.sll_family = AF_PACKET;
2549 addr.sll_ifindex = ifr.ifr_ifindex;
2550 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
2553 drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
2554 if (drv->eapol_sock < 0) {
2555 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
2559 if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
2561 printf("Could not register read socket for eapol\n");
2565 memset(&ifr, 0, sizeof(ifr));
2566 os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
2567 if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
2568 perror("ioctl(SIOCGIFHWADDR)");
2572 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
2573 printf("Invalid HW-addr family 0x%04x\n",
2574 ifr.ifr_hwaddr.sa_family);
2577 memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
2582 nl80211_remove_iface(drv, drv->monitor_ifidx);
2587 static int i802_get_inact_sec(void *priv, const u8 *addr)
2589 struct hostap_sta_driver_data data;
2592 data.inactive_msec = (unsigned long) -1;
2593 ret = i802_read_sta_data(priv, &data, addr);
2594 if (ret || data.inactive_msec == (unsigned long) -1)
2596 return data.inactive_msec / 1000;
2600 static int i802_sta_clear_stats(void *priv, const u8 *addr)
2610 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
2613 wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2615 if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2618 pos = strstr(custom, "addr=");
2620 wpa_printf(MSG_DEBUG,
2621 "MLME-MICHAELMICFAILURE.indication "
2622 "without sender address ignored");
2626 if (hwaddr_aton(pos, addr) == 0) {
2627 hostapd_michael_mic_failure(drv->hapd, addr);
2629 wpa_printf(MSG_DEBUG,
2630 "MLME-MICHAELMICFAILURE.indication "
2631 "with invalid MAC address");
2637 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2638 char *data, int len)
2640 struct iw_event iwe_buf, *iwe = &iwe_buf;
2641 char *pos, *end, *custom, *buf;
2646 while (pos + IW_EV_LCP_LEN <= end) {
2647 /* Event data may be unaligned, so make a local, aligned copy
2648 * before processing. */
2649 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2650 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2651 iwe->cmd, iwe->len);
2652 if (iwe->len <= IW_EV_LCP_LEN)
2655 custom = pos + IW_EV_POINT_LEN;
2656 if (drv->we_version > 18 &&
2657 (iwe->cmd == IWEVMICHAELMICFAILURE ||
2658 iwe->cmd == IWEVCUSTOM)) {
2659 /* WE-19 removed the pointer from struct iw_point */
2660 char *dpos = (char *) &iwe_buf.u.data.length;
2661 int dlen = dpos - (char *) &iwe_buf;
2662 memcpy(dpos, pos + IW_EV_LCP_LEN,
2663 sizeof(struct iw_event) - dlen);
2665 memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2666 custom += IW_EV_POINT_OFF;
2671 if (custom + iwe->u.data.length > end)
2673 buf = malloc(iwe->u.data.length + 1);
2676 memcpy(buf, custom, iwe->u.data.length);
2677 buf[iwe->u.data.length] = '\0';
2678 hostapd_wireless_event_wireless_custom(drv, buf);
2688 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2689 struct nlmsghdr *h, int len)
2691 struct ifinfomsg *ifi;
2692 int attrlen, _nlmsg_len, rta_len;
2693 struct rtattr *attr;
2695 if (len < (int) sizeof(*ifi))
2698 ifi = NLMSG_DATA(h);
2700 /* TODO: use ifi->ifi_index to filter out wireless events from other
2703 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2705 attrlen = h->nlmsg_len - _nlmsg_len;
2709 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
2711 rta_len = RTA_ALIGN(sizeof(struct rtattr));
2712 while (RTA_OK(attr, attrlen)) {
2713 if (attr->rta_type == IFLA_WIRELESS) {
2714 hostapd_wireless_event_wireless(
2715 drv, ((char *) attr) + rta_len,
2716 attr->rta_len - rta_len);
2718 attr = RTA_NEXT(attr, attrlen);
2723 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2728 struct sockaddr_nl from;
2731 struct i802_driver_data *drv = eloop_ctx;
2733 fromlen = sizeof(from);
2734 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2735 (struct sockaddr *) &from, &fromlen);
2737 if (errno != EINTR && errno != EAGAIN)
2738 perror("recvfrom(netlink)");
2742 h = (struct nlmsghdr *) buf;
2743 while (left >= (int) sizeof(*h)) {
2747 plen = len - sizeof(*h);
2748 if (len > left || plen < 0) {
2749 printf("Malformed netlink message: "
2750 "len=%d left=%d plen=%d\n",
2755 switch (h->nlmsg_type) {
2757 hostapd_wireless_event_rtm_newlink(drv, h, plen);
2761 len = NLMSG_ALIGN(len);
2763 h = (struct nlmsghdr *) ((char *) h + len);
2767 printf("%d extra bytes in the end of netlink message\n", left);
2772 static int hostap_get_we_version(struct i802_driver_data *drv)
2774 struct iw_range *range;
2779 drv->we_version = 0;
2782 * Use larger buffer than struct iw_range in order to allow the
2783 * structure to grow in the future.
2785 buflen = sizeof(struct iw_range) + 500;
2786 range = os_zalloc(buflen);
2790 memset(&iwr, 0, sizeof(iwr));
2791 os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2792 iwr.u.data.pointer = (caddr_t) range;
2793 iwr.u.data.length = buflen;
2795 minlen = ((char *) &range->enc_capa) - (char *) range +
2796 sizeof(range->enc_capa);
2798 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2799 perror("ioctl[SIOCGIWRANGE]");
2802 } else if (iwr.u.data.length >= minlen &&
2803 range->we_version_compiled >= 18) {
2804 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2805 "WE(source)=%d enc_capa=0x%x",
2806 range->we_version_compiled,
2807 range->we_version_source,
2809 drv->we_version = range->we_version_compiled;
2817 static int i802_wireless_event_init(struct i802_driver_data *drv)
2820 struct sockaddr_nl local;
2822 hostap_get_we_version(drv);
2824 drv->wext_sock = -1;
2826 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2828 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2832 memset(&local, 0, sizeof(local));
2833 local.nl_family = AF_NETLINK;
2834 local.nl_groups = RTMGRP_LINK;
2835 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2836 perror("bind(netlink)");
2841 eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2849 static void i802_wireless_event_deinit(struct i802_driver_data *drv)
2851 if (drv->wext_sock < 0)
2853 eloop_unregister_read_sock(drv->wext_sock);
2854 close(drv->wext_sock);
2858 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2860 struct i802_driver_data *drv = priv;
2861 struct ieee80211_mgmt mgmt;
2863 memset(&mgmt, 0, sizeof(mgmt));
2864 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2865 WLAN_FC_STYPE_DEAUTH);
2866 memcpy(mgmt.da, addr, ETH_ALEN);
2867 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2868 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2869 mgmt.u.deauth.reason_code = host_to_le16(reason);
2870 return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2871 sizeof(mgmt.u.deauth), 0);
2875 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2877 struct i802_driver_data *drv = priv;
2878 struct ieee80211_mgmt mgmt;
2880 memset(&mgmt, 0, sizeof(mgmt));
2881 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2882 WLAN_FC_STYPE_DISASSOC);
2883 memcpy(mgmt.da, addr, ETH_ALEN);
2884 memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2885 memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2886 mgmt.u.disassoc.reason_code = host_to_le16(reason);
2887 return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2888 sizeof(mgmt.u.disassoc), 0);
2892 static const struct hostapd_neighbor_bss *
2893 i802_get_neighbor_bss(void *priv, size_t *num)
2895 struct i802_driver_data *drv = priv;
2896 *num = drv->num_neighbors;
2897 return drv->neighbors;
2901 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2903 struct i802_driver_data *drv;
2905 drv = os_zalloc(sizeof(struct i802_driver_data));
2907 printf("Could not allocate memory for i802 driver data\n");
2912 memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2913 memcpy(drv->bss.iface, hapd->conf->iface, sizeof(drv->iface));
2915 drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2916 drv->if_indices = drv->default_if_indices;
2917 drv->bridge = if_nametoindex(hapd->conf->bridge);
2918 drv->ht_40mhz_scan = hapd->iconf->secondary_channel != 0;
2920 if (i802_init_sockets(drv, bssid))
2923 if (i802_wireless_event_init(drv))
2934 static void *i802_init(struct hostapd_data *hapd)
2936 return i802_init_bssid(hapd, NULL);
2940 static void i802_deinit(void *priv)
2942 struct i802_driver_data *drv = priv;
2943 struct i802_bss *bss, *prev;
2945 i802_wireless_event_deinit(drv);
2947 if (drv->last_freq_ht) {
2948 /* Clear HT flags from the driver */
2949 struct hostapd_freq_params freq;
2950 os_memset(&freq, 0, sizeof(freq));
2951 freq.freq = drv->last_freq;
2952 i802_set_freq(priv, &freq);
2955 i802_del_beacon(drv);
2957 /* remove monitor interface */
2958 nl80211_remove_iface(drv, drv->monitor_ifidx);
2960 (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2962 if (drv->monitor_sock >= 0) {
2963 eloop_unregister_read_sock(drv->monitor_sock);
2964 close(drv->monitor_sock);
2966 if (drv->ioctl_sock >= 0)
2967 close(drv->ioctl_sock);
2968 if (drv->eapol_sock >= 0) {
2969 eloop_unregister_read_sock(drv->eapol_sock);
2970 close(drv->eapol_sock);
2973 genl_family_put(drv->nl80211);
2974 nl_cache_free(drv->nl_cache);
2975 nl_handle_destroy(drv->nl_handle);
2976 nl_cb_put(drv->nl_cb);
2978 if (drv->if_indices != drv->default_if_indices)
2979 free(drv->if_indices);
2981 os_free(drv->neighbors);
2983 bss = drv->bss.next;
2994 const struct hapd_driver_ops wpa_driver_nl80211_ops = {
2997 .init_bssid = i802_init_bssid,
2998 .deinit = i802_deinit,
2999 .set_privacy = i802_set_privacy,
3000 .set_key = i802_set_key,
3001 .get_seqnum = i802_get_seqnum,
3002 .flush = i802_flush,
3003 .read_sta_data = i802_read_sta_data,
3004 .send_eapol = i802_send_eapol,
3005 .sta_set_flags = i802_sta_set_flags,
3006 .sta_deauth = i802_sta_deauth,
3007 .sta_disassoc = i802_sta_disassoc,
3008 .sta_remove = i802_sta_remove,
3009 .send_mgmt_frame = i802_send_mgmt_frame,
3010 .sta_add = i802_sta_add,
3011 .get_inact_sec = i802_get_inact_sec,
3012 .sta_clear_stats = i802_sta_clear_stats,
3013 .set_freq = i802_set_freq,
3014 .set_rts = i802_set_rts,
3015 .set_frag = i802_set_frag,
3016 .set_retry = i802_set_retry,
3017 .set_rate_sets = i802_set_rate_sets,
3018 .set_beacon = i802_set_beacon,
3019 .set_internal_bridge = i802_set_internal_bridge,
3020 .set_beacon_int = i802_set_beacon_int,
3021 .set_cts_protect = i802_set_cts_protect,
3022 .set_preamble = i802_set_preamble,
3023 .set_short_slot_time = i802_set_short_slot_time,
3024 .set_tx_queue_params = i802_set_tx_queue_params,
3025 .bss_add = i802_bss_add,
3026 .bss_remove = i802_bss_remove,
3027 .if_add = i802_if_add,
3028 .if_update = i802_if_update,
3029 .if_remove = i802_if_remove,
3030 .get_hw_feature_data = i802_get_hw_feature_data,
3031 .set_sta_vlan = i802_set_sta_vlan,
3032 .set_country = i802_set_country,
3033 .get_neighbor_bss = i802_get_neighbor_bss,