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fragattacks/hostapd/driver_nl80211.c
Artem Antonov eaaab2bd98 Fix nl80211 driver to receive EAPOL response 
This patch fixes nl80211 driver to receive EAPOL response if wlan0 was
added to bridge.
2008-04-08 09:49:06 +03:00

2388 lines
54 KiB
C
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/*
* hostapd / Kernel driver communication via nl80211
* Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
* Copyright (c) 2003-2004, Instant802 Networks, Inc.
* Copyright (c) 2005-2006, Devicescape Software, Inc.
* Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include <sys/ioctl.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <netlink/msg.h>
#include <netlink/attr.h>
#include <linux/nl80211.h>
#include <net/if.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h> /* The L2 protocols */
#include <linux/wireless.h>
#include <net/if_arp.h>
#include "hostapd.h"
#include "driver.h"
#include "ieee802_1x.h"
#include "eloop.h"
#include "ieee802_11.h"
#include "sta_info.h"
#include "hw_features.h"
#include "mlme.h"
#include "radiotap.h"
#include "radiotap_iter.h"
enum ieee80211_msg_type {
ieee80211_msg_normal = 0,
ieee80211_msg_tx_callback_ack = 1,
ieee80211_msg_tx_callback_fail = 2,
};
struct i802_driver_data {
struct hostapd_data *hapd;
char iface[IFNAMSIZ + 1];
int bridge;
int ioctl_sock; /* socket for ioctl() use */
int wext_sock; /* socket for wireless events */
int eapol_sock; /* socket for EAPOL frames */
int monitor_sock; /* socket for monitor */
int monitor_ifidx;
int default_if_indices[16];
int *if_indices;
int num_if_indices;
int we_version;
struct nl_handle *nl_handle;
struct nl_cache *nl_cache;
struct genl_family *nl80211;
int dtim_period;
unsigned int beacon_set:1;
unsigned int ieee802_1x_active:1;
};
static void add_ifidx(struct i802_driver_data *drv, int ifidx)
{
int i;
int *old;
for (i = 0; i < drv->num_if_indices; i++) {
if (drv->if_indices[i] == 0) {
drv->if_indices[i] = ifidx;
return;
}
}
if (drv->if_indices != drv->default_if_indices)
old = drv->if_indices;
else
old = NULL;
drv->if_indices = realloc(old,
sizeof(int) * (drv->num_if_indices + 1));
if (!drv->if_indices) {
if (!old)
drv->if_indices = drv->default_if_indices;
else
drv->if_indices = old;
wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
"interfaces");
wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
return;
}
drv->if_indices[drv->num_if_indices] = ifidx;
drv->num_if_indices++;
}
static void del_ifidx(struct i802_driver_data *drv, int ifidx)
{
int i;
for (i = 0; i < drv->num_if_indices; i++) {
if (drv->if_indices[i] == ifidx) {
drv->if_indices[i] = 0;
break;
}
}
}
static int have_ifidx(struct i802_driver_data *drv, int ifidx)
{
int i;
if (ifidx == drv->bridge)
return 1;
for (i = 0; i < drv->num_if_indices; i++)
if (drv->if_indices[i] == ifidx)
return 1;
return 0;
}
/* helper for netlink get routines */
static int ack_wait_handler(struct nl_msg *msg, void *arg)
{
int *finished = arg;
*finished = 1;
return NL_STOP;
}
static int hostapd_set_iface_flags(struct i802_driver_data *drv,
const char *ifname, int dev_up)
{
struct ifreq ifr;
if (drv->ioctl_sock < 0)
return -1;
memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
perror("ioctl[SIOCGIFFLAGS]");
wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
drv->iface);
return -1;
}
if (dev_up)
ifr.ifr_flags |= IFF_UP;
else
ifr.ifr_flags &= ~IFF_UP;
if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
perror("ioctl[SIOCSIFFLAGS]");
return -1;
}
return 0;
}
static int i802_set_encryption(const char *iface, void *priv, const char *alg,
const u8 *addr, int idx, const u8 *key,
size_t key_len, int txkey)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
int ret = -1;
int err = 0;
msg = nlmsg_alloc();
if (!msg)
goto out;
if (strcmp(alg, "none") == 0) {
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_KEY, 0);
} else {
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_NEW_KEY, 0);
NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
if (strcmp(alg, "WEP") == 0) {
if (key_len == 5)
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
0x000FAC01);
else
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
0x000FAC05);
} else if (strcmp(alg, "TKIP") == 0)
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
else if (strcmp(alg, "CCMP") == 0)
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
else
goto out;
}
if (addr)
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
(err = nl_wait_for_ack(drv->nl_handle)) < 0) {
if (err != -ENOENT) {
err = 0;
goto out;
}
}
/*
* If we need to set the default TX key we do that below,
* otherwise we're done here.
*/
if (!txkey || addr) {
ret = 0;
goto out;
}
nlmsg_free(msg);
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_KEY, 0);
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
(err = nl_wait_for_ack(drv->nl_handle)) < 0) {
if (err != -ENOENT) {
err = 0;
goto out;
}
}
ret = 0;
out:
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static inline int min_int(int a, int b)
{
if (a < b)
return a;
return b;
}
static int get_key_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
/*
* TODO: validate the key index and mac address!
* Otherwise, there's a race condition as soon as
* the kernel starts sending key notifications.
*/
if (tb[NL80211_ATTR_KEY_SEQ])
memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
return NL_SKIP;
}
static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
int idx, u8 *seq)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
struct nl_cb *cb = NULL;
int ret = -1;
int err = 0;
int finished = 0;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_KEY, 0);
if (addr)
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
cb = nl_cb_alloc(NL_CB_CUSTOM);
if (!cb)
goto out;
memset(seq, 0, 6);
if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
goto out;
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_key_handler, seq);
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
err = nl_recvmsgs(drv->nl_handle, cb);
if (!finished)
err = nl_wait_for_ack(drv->nl_handle);
if (err < 0)
goto out;
ret = 0;
out:
nl_cb_put(cb);
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
int mode)
{
return -1;
}
static int i802_set_ssid(const char *ifname, void *priv, const u8 *buf,
int len)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.essid.flags = 1; /* SSID active */
iwr.u.essid.pointer = (caddr_t) buf;
iwr.u.essid.length = len;
if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
perror("ioctl[SIOCSIWESSID]");
printf("len=%d\n", len);
return -1;
}
return 0;
}
static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
int flags)
{
struct ieee80211_hdr *hdr = (void*) data;
__u8 rtap_hdr[] = {
0x00, 0x00, /* radiotap version */
0x0e, 0x00, /* radiotap length */
0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
0x0c, /* F_WEP | F_FRAG (encrypt/fragment if required) */
0x00, /* padding */
0x00, 0x00, /* RX and TX flags to indicate that */
0x00, 0x00, /* this is the injected frame directly */
};
struct i802_driver_data *drv = priv;
struct iovec iov[2] = {
{
.iov_base = &rtap_hdr,
.iov_len = sizeof(rtap_hdr),
},
{
.iov_base = (void*)data,
.iov_len = len,
}
};
struct msghdr msg = {
.msg_name = NULL,
.msg_namelen = 0,
.msg_iov = iov,
.msg_iovlen = 2,
.msg_control = NULL,
.msg_controllen = 0,
.msg_flags = 0,
};
/*
* ugh, guess what, the generic code sets one of the version
* bits to request tx callback
*/
hdr->frame_control &= ~host_to_le16(BIT(1));
return sendmsg(drv->monitor_sock, &msg, flags);
}
/* Set kernel driver on given frequency (MHz) */
static int i802_set_freq(void *priv, int mode, int freq)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
iwr.u.freq.m = freq;
iwr.u.freq.e = 6;
if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
perror("ioctl[SIOCSIWFREQ]");
return -1;
}
return 0;
}
static int i802_set_rts(void *priv, int rts)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
iwr.u.rts.value = rts;
iwr.u.rts.fixed = 1;
if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
perror("ioctl[SIOCSIWRTS]");
return -1;
}
return 0;
}
static int i802_get_rts(void *priv, int *rts)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
perror("ioctl[SIOCGIWRTS]");
return -1;
}
*rts = iwr.u.rts.value;
return 0;
}
static int i802_set_frag(void *priv, int frag)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
iwr.u.frag.value = frag;
iwr.u.frag.fixed = 1;
if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
perror("ioctl[SIOCSIWFRAG]");
return -1;
}
return 0;
}
static int i802_get_frag(void *priv, int *frag)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
perror("ioctl[SIOCGIWFRAG]");
return -1;
}
*frag = iwr.u.frag.value;
return 0;
}
static int i802_set_retry(void *priv, int short_retry, int long_retry)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
iwr.u.retry.value = short_retry;
iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
perror("ioctl[SIOCSIWRETRY(short)]");
return -1;
}
iwr.u.retry.value = long_retry;
iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
perror("ioctl[SIOCSIWRETRY(long)]");
return -1;
}
return 0;
}
static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
perror("ioctl[SIOCGIWFRAG(short)]");
return -1;
}
*short_retry = iwr.u.retry.value;
iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
perror("ioctl[SIOCGIWFRAG(long)]");
return -1;
}
*long_retry = iwr.u.retry.value;
return 0;
}
static int i802_flush(void *priv)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_NEW_STATION, 0);
/*
* XXX: FIX! this needs to flush all VLANs too
*/
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(drv->iface));
ret = 0;
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0) {
ret = -1;
}
nla_put_failure:
nlmsg_free(msg);
out:
return ret;
}
static int get_sta_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct hostap_sta_driver_data *data = arg;
struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
[NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
[NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
[NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
};
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
/*
* TODO: validate the interface and mac address!
* Otherwise, there's a race condition as soon as
* the kernel starts sending station notifications.
*/
if (!tb[NL80211_ATTR_STA_INFO]) {
wpa_printf(MSG_DEBUG, "sta stats missing!");
return NL_SKIP;
}
if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
tb[NL80211_ATTR_STA_INFO],
stats_policy)) {
wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
return NL_SKIP;
}
if (stats[NL80211_STA_INFO_INACTIVE_TIME])
data->inactive_msec =
nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
if (stats[NL80211_STA_INFO_RX_BYTES])
data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
if (stats[NL80211_STA_INFO_TX_BYTES])
data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
return NL_SKIP;
}
static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
const u8 *addr)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
struct nl_cb *cb = NULL;
int ret = -1;
int err = 0;
int finished = 0;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_STATION, 0);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
cb = nl_cb_alloc(NL_CB_CUSTOM);
if (!cb)
goto out;
if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
goto out;
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_sta_handler, data);
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
err = nl_recvmsgs(drv->nl_handle, cb);
if (!finished)
err = nl_wait_for_ack(drv->nl_handle);
if (err < 0)
goto out;
ret = 0;
out:
nl_cb_put(cb);
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
size_t data_len, int encrypt, const u8 *own_addr)
{
struct i802_driver_data *drv = priv;
struct ieee80211_hdr *hdr;
size_t len;
u8 *pos;
int res;
#if 0 /* FIX */
int qos = sta->flags & WLAN_STA_WME;
#else
int qos = 0;
#endif
len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
data_len;
hdr = os_zalloc(len);
if (hdr == NULL) {
printf("malloc() failed for i802_send_data(len=%lu)\n",
(unsigned long) len);
return -1;
}
hdr->frame_control =
IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
if (encrypt)
hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
#if 0 /* To be enabled if qos determination is added above */
if (qos) {
hdr->frame_control |=
host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
}
#endif
memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
pos = (u8 *) (hdr + 1);
#if 0 /* To be enabled if qos determination is added above */
if (qos) {
/* add an empty QoS header if needed */
pos[0] = 0;
pos[1] = 0;
pos += 2;
}
#endif
memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
pos += sizeof(rfc1042_header);
WPA_PUT_BE16(pos, ETH_P_PAE);
pos += 2;
memcpy(pos, data, data_len);
res = i802_send_mgmt_frame(drv, (u8 *) hdr, len, 0);
free(hdr);
if (res < 0) {
perror("i802_send_eapol: send");
printf("i802_send_eapol - packet len: %lu - failed\n",
(unsigned long) len);
}
return res;
}
static int i802_sta_add(const char *ifname, void *priv, const u8 *addr,
u16 aid, u16 capability, u8 *supp_rates,
size_t supp_rates_len, int flags, u16 listen_interval)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_NEW_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(drv->iface));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, aid);
NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
supp_rates);
NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, listen_interval);
ret = nl_send_auto_complete(drv->nl_handle, msg);
if (ret < 0)
goto nla_put_failure;
ret = nl_wait_for_ack(drv->nl_handle);
/* ignore EEXIST, this happens if a STA associates while associated */
if (ret == -EEXIST || ret >= 0)
ret = 0;
nla_put_failure:
nlmsg_free(msg);
out:
return ret;
}
static int i802_sta_remove(void *priv, const u8 *addr)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(drv->iface));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
ret = 0;
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0) {
ret = -1;
}
nla_put_failure:
nlmsg_free(msg);
out:
return ret;
}
static int i802_sta_set_flags(void *priv, const u8 *addr,
int total_flags, int flags_or, int flags_and)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg, *flags = NULL;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
flags = nlmsg_alloc();
if (!flags)
goto free_msg;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(drv->iface));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
if (total_flags & WLAN_STA_WME)
NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
if (total_flags & WLAN_STA_SHORT_PREAMBLE)
NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
goto nla_put_failure;
ret = 0;
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0) {
ret = -1;
}
nla_put_failure:
nlmsg_free(flags);
free_msg:
nlmsg_free(msg);
out:
return ret;
}
static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
unsigned char power_level,
unsigned char antenna_max)
{
return -1;
}
static int i802_set_regulatory_domain(void *priv, unsigned int rd)
{
return -1;
}
static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
int cw_min, int cw_max, int burst_time)
{
return -1;
}
static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
{
struct nl_msg *msg;
/* stop listening for EAPOL on this interface */
del_ifidx(drv, ifidx);
msg = nlmsg_alloc();
if (!msg)
goto nla_put_failure;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_INTERFACE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0)
nla_put_failure:
printf("Failed to remove interface.\n");
nlmsg_free(msg);
}
static int nl80211_create_iface(struct i802_driver_data *drv,
const char *ifname,
enum nl80211_iftype iftype,
const u8 *addr)
{
struct nl_msg *msg, *flags = NULL;
int ifidx;
struct ifreq ifreq;
struct iwreq iwr;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_NEW_INTERFACE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(drv->hapd->conf->iface));
NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
if (iftype == NL80211_IFTYPE_MONITOR) {
int err;
flags = nlmsg_alloc();
if (!flags)
goto nla_put_failure;
NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
nlmsg_free(flags);
if (err)
goto nla_put_failure;
}
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0) {
nla_put_failure:
printf("Failed to create interface %s.\n", ifname);
nlmsg_free(msg);
return -1;
}
nlmsg_free(msg);
ifidx = if_nametoindex(ifname);
if (ifidx <= 0)
return -1;
/* start listening for EAPOL on this interface */
add_ifidx(drv, ifidx);
if (addr) {
switch (iftype) {
case NL80211_IFTYPE_AP:
os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
nl80211_remove_iface(drv, ifidx);
return -1;
}
break;
case NL80211_IFTYPE_WDS:
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.addr.sa_family = ARPHRD_ETHER;
memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
return -1;
break;
default:
/* nothing */
break;
}
}
return ifidx;
}
static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
{
int ifidx;
/*
* The kernel supports that when the low-level driver does,
* but we currently don't because we need per-BSS data that
* currently we can't handle easily.
*/
return -1;
ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
if (ifidx < 0)
return -1;
if (hostapd_set_iface_flags(priv, ifname, 1)) {
nl80211_remove_iface(priv, ifidx);
return -1;
}
return 0;
}
static int i802_bss_remove(void *priv, const char *ifname)
{
nl80211_remove_iface(priv, if_nametoindex(ifname));
return 0;
}
static int i802_set_beacon(const char *iface, void *priv,
u8 *head, size_t head_len,
u8 *tail, size_t tail_len)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
u8 cmd = NL80211_CMD_NEW_BEACON;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
if (drv->beacon_set)
cmd = NL80211_CMD_SET_BEACON;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, cmd, 0);
NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, 1000);
if (!drv->dtim_period)
drv->dtim_period = 2;
NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0)
goto out;
ret = 0;
drv->beacon_set = 1;
out:
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int i802_del_beacon(struct i802_driver_data *drv)
{
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_BEACON, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0)
goto out;
ret = 0;
out:
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
{
struct i802_driver_data *drv = priv;
/*
* FIXME: This needs to be per interface (BSS)
*/
drv->ieee802_1x_active = enabled;
return 0;
}
static int i802_set_privacy(const char *ifname, void *priv, int enabled)
{
struct i802_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
iwr.u.param.value = enabled;
ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
/* ignore errors, the kernel/driver might not care */
return 0;
}
static int i802_set_internal_bridge(void *priv, int value)
{
return -1;
}
static int i802_set_beacon_int(void *priv, int value)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_BEACON, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0)
goto out;
ret = 0;
out:
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int i802_set_dtim_period(const char *iface, void *priv, int value)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_BEACON, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
drv->dtim_period = value;
NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0)
goto out;
ret = 0;
out:
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int i802_set_cts_protect(void *priv, int value)
{
return -1;
}
static int i802_set_preamble(void *priv, int value)
{
return -1;
}
static int i802_set_short_slot_time(void *priv, int value)
{
return -1;
}
static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
{
switch (type) {
case HOSTAPD_IF_VLAN:
return NL80211_IFTYPE_AP_VLAN;
case HOSTAPD_IF_WDS:
return NL80211_IFTYPE_WDS;
}
return -1;
}
static int i802_if_add(const char *iface, void *priv,
enum hostapd_driver_if_type type, char *ifname,
const u8 *addr)
{
if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
return -1;
return 0;
}
static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
char *ifname, const u8 *addr)
{
/* unused at the moment */
return -1;
}
static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
const char *ifname, const u8 *addr)
{
nl80211_remove_iface(priv, if_nametoindex(ifname));
return 0;
}
struct phy_info_arg {
u16 *num_modes;
struct hostapd_hw_modes *modes;
int error;
};
static int phy_info_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct phy_info_arg *phy_info = arg;
struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
[NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
[NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
[NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
[NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
};
struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
[NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
};
struct nlattr *nl_band;
struct nlattr *nl_freq;
struct nlattr *nl_rate;
int rem_band, rem_freq, rem_rate;
struct hostapd_hw_modes *mode;
int idx, mode_is_set;
nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
return NL_SKIP;
nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
if (!mode)
return NL_SKIP;
phy_info->modes = mode;
mode_is_set = 0;
mode = &phy_info->modes[*(phy_info->num_modes)];
memset(mode, 0, sizeof(*mode));
*(phy_info->num_modes) += 1;
nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
nla_len(nl_band), NULL);
nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
nla_len(nl_freq), freq_policy);
if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
continue;
mode->num_channels++;
}
mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
if (!mode->channels)
return NL_SKIP;
idx = 0;
nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
nla_len(nl_freq), freq_policy);
if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
continue;
mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
HOSTAPD_CHAN_W_ACTIVE_SCAN |
HOSTAPD_CHAN_W_IBSS;
if (!mode_is_set) {
/* crude heuristic */
if (mode->channels[idx].freq < 4000)
mode->mode = HOSTAPD_MODE_IEEE80211B;
else
mode->mode = HOSTAPD_MODE_IEEE80211A;
mode_is_set = 1;
}
/* crude heuristic */
if (mode->channels[idx].freq < 4000)
if (mode->channels[idx].freq == 2848)
mode->channels[idx].chan = 14;
else
mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
else
mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
idx++;
}
nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
nla_len(nl_rate), rate_policy);
if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
continue;
mode->num_rates++;
}
mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
if (!mode->rates)
return NL_SKIP;
idx = 0;
nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
nla_len(nl_rate), rate_policy);
if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
continue;
mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
/* crude heuristic */
if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
mode->rates[idx].rate > 200)
mode->mode = HOSTAPD_MODE_IEEE80211G;
if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
idx++;
}
}
phy_info->error = 0;
return NL_SKIP;
}
static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
u16 *num_modes,
u16 *flags)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
int err = -1;
struct nl_cb *cb = NULL;
int finished;
struct phy_info_arg result = {
.num_modes = num_modes,
.modes = NULL,
.error = 1,
};
*num_modes = 0;
*flags = 0;
msg = nlmsg_alloc();
if (!msg)
return NULL;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_WIPHY, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
cb = nl_cb_alloc(NL_CB_CUSTOM);
if (!cb)
goto out;
if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
goto out;
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
err = nl_recvmsgs(drv->nl_handle, cb);
if (!finished)
err = nl_wait_for_ack(drv->nl_handle);
if (err < 0 || result.error) {
hostapd_free_hw_features(result.modes, *num_modes);
result.modes = NULL;
}
out:
nl_cb_put(cb);
nla_put_failure:
if (err)
fprintf(stderr, "failed to get information: %d\n", err);
nlmsg_free(msg);
return result.modes;
}
static int i802_set_sta_vlan(void *priv, const u8 *addr,
const char *ifname, int vlan_id)
{
struct i802_driver_data *drv = priv;
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
goto out;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(drv->iface));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(ifname));
ret = 0;
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
(errno = nl_wait_for_ack(drv->nl_handle) < 0)) {
ret = -1;
}
nla_put_failure:
nlmsg_free(msg);
out:
return ret;
}
static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
{
struct sta_info *sta;
sta = ap_get_sta(hapd, ta);
if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
printf("Data/PS-poll frame from not associated STA "
MACSTR "\n", MAC2STR(ta));
if (sta && (sta->flags & WLAN_STA_AUTH))
hostapd_sta_disassoc(
hapd, ta,
WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
else
hostapd_sta_deauth(
hapd, ta,
WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
}
}
static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
int ok)
{
struct ieee80211_hdr *hdr;
u16 fc, type, stype;
struct sta_info *sta;
hdr = (struct ieee80211_hdr *) buf;
fc = le_to_host16(hdr->frame_control);
type = WLAN_FC_GET_TYPE(fc);
stype = WLAN_FC_GET_STYPE(fc);
switch (type) {
case WLAN_FC_TYPE_MGMT:
wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
ok ? "ACK" : "fail");
ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
break;
case WLAN_FC_TYPE_CTRL:
wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
ok ? "ACK" : "fail");
break;
case WLAN_FC_TYPE_DATA:
wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
ok ? "ACK" : "fail");
sta = ap_get_sta(hapd, hdr->addr1);
if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
"activity poll", MAC2STR(sta->addr),
ok ? "ACKed" : "did not ACK");
if (ok)
sta->flags &= ~WLAN_STA_PENDING_POLL;
}
if (sta)
ieee802_1x_tx_status(hapd, sta, buf, len, ok);
break;
default:
printf("unknown TX callback frame type %d\n", type);
break;
}
}
static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
struct hostapd_frame_info *hfi,
enum ieee80211_msg_type msg_type)
{
struct ieee80211_hdr *hdr;
u16 fc, type, stype;
size_t data_len = len;
struct hostapd_data *hapd = NULL;
int broadcast_bssid = 0;
size_t i;
u8 *bssid;
/*
* PS-Poll frames are 16 bytes. All other frames are
* 24 bytes or longer.
*/
if (len < 16)
return;
hdr = (struct ieee80211_hdr *) buf;
fc = le_to_host16(hdr->frame_control);
type = WLAN_FC_GET_TYPE(fc);
stype = WLAN_FC_GET_STYPE(fc);
switch (type) {
case WLAN_FC_TYPE_DATA:
if (len < 24)
return;
switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
case WLAN_FC_TODS:
bssid = hdr->addr1;
break;
default:
/* discard */
return;
}
break;
case WLAN_FC_TYPE_CTRL:
/* discard non-ps-poll frames */
if (stype != WLAN_FC_STYPE_PSPOLL)
return;
bssid = hdr->addr1;
break;
case WLAN_FC_TYPE_MGMT:
bssid = hdr->addr3;
break;
default:
/* discard */
return;
}
/* find interface frame belongs to */
for (i = 0; i < iface->num_bss; i++) {
if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
hapd = iface->bss[i];
break;
}
}
if (hapd == NULL) {
hapd = iface->bss[0];
if (bssid[0] != 0xff || bssid[1] != 0xff ||
bssid[2] != 0xff || bssid[3] != 0xff ||
bssid[4] != 0xff || bssid[5] != 0xff) {
/*
* Unknown BSSID - drop frame if this is not from
* passive scanning or a beacon (at least ProbeReq
* frames to other APs may be allowed through RX
* filtering in the wlan hw/driver)
*/
if ((type != WLAN_FC_TYPE_MGMT ||
stype != WLAN_FC_STYPE_BEACON))
return;
} else
broadcast_bssid = 1;
}
switch (msg_type) {
case ieee80211_msg_normal:
/* continue processing */
break;
case ieee80211_msg_tx_callback_ack:
handle_tx_callback(hapd, buf, data_len, 1);
return;
case ieee80211_msg_tx_callback_fail:
handle_tx_callback(hapd, buf, data_len, 0);
return;
}
switch (type) {
case WLAN_FC_TYPE_MGMT:
if (stype != WLAN_FC_STYPE_BEACON &&
stype != WLAN_FC_STYPE_PROBE_REQ)
wpa_printf(MSG_MSGDUMP, "MGMT");
if (broadcast_bssid) {
for (i = 0; i < iface->num_bss; i++)
ieee802_11_mgmt(iface->bss[i], buf, data_len,
stype, hfi);
} else
ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
break;
case WLAN_FC_TYPE_CTRL:
/* can only get here with PS-Poll frames */
wpa_printf(MSG_DEBUG, "CTRL");
handle_unknown_sta(hapd, hdr->addr2);
break;
case WLAN_FC_TYPE_DATA:
wpa_printf(MSG_DEBUG, "DATA");
handle_unknown_sta(hapd, hdr->addr2);
break;
}
}
static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
{
struct i802_driver_data *drv = eloop_ctx;
struct hostapd_data *hapd = drv->hapd;
struct sockaddr_ll lladdr;
unsigned char buf[3000];
int len;
socklen_t fromlen = sizeof(lladdr);
len = recvfrom(sock, buf, sizeof(buf), 0,
(struct sockaddr *)&lladdr, &fromlen);
if (len < 0) {
perror("recv");
return;
}
if (have_ifidx(drv, lladdr.sll_ifindex))
ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
}
static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
{
struct i802_driver_data *drv = eloop_ctx;
int len;
unsigned char buf[3000];
struct hostapd_data *hapd = drv->hapd;
struct ieee80211_radiotap_iterator iter;
int ret;
struct hostapd_frame_info hfi;
int injected = 0, failed = 0, msg_type, rxflags = 0;
len = recv(sock, buf, sizeof(buf), 0);
if (len < 0) {
perror("recv");
return;
}
if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
printf("received invalid radiotap frame\n");
return;
}
memset(&hfi, 0, sizeof(hfi));
while (1) {
ret = ieee80211_radiotap_iterator_next(&iter);
if (ret == -ENOENT)
break;
if (ret) {
printf("received invalid radiotap frame (%d)\n", ret);
return;
}
switch (iter.this_arg_index) {
case IEEE80211_RADIOTAP_FLAGS:
if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
len -= 4;
break;
case IEEE80211_RADIOTAP_RX_FLAGS:
rxflags = 1;
break;
case IEEE80211_RADIOTAP_TX_FLAGS:
injected = 1;
failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
IEEE80211_RADIOTAP_F_TX_FAIL;
break;
case IEEE80211_RADIOTAP_DATA_RETRIES:
break;
case IEEE80211_RADIOTAP_CHANNEL:
/* TODO convert from freq/flags to channel number
hfi.channel = XXX;
hfi.phytype = XXX;
*/
break;
case IEEE80211_RADIOTAP_RATE:
hfi.datarate = *iter.this_arg * 5;
break;
case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
hfi.ssi_signal = *iter.this_arg;
break;
}
}
if (rxflags && injected)
return;
if (!injected)
msg_type = ieee80211_msg_normal;
else if (failed)
msg_type = ieee80211_msg_tx_callback_fail;
else
msg_type = ieee80211_msg_tx_callback_ack;
handle_frame(hapd->iface, buf + iter.max_length,
len - iter.max_length, &hfi, msg_type);
}
static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
{
char buf[IFNAMSIZ];
struct sockaddr_ll ll;
int optval;
socklen_t optlen;
snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
buf[IFNAMSIZ - 1] = '\0';
drv->monitor_ifidx =
nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
if (drv->monitor_ifidx < 0)
return -1;
if (hostapd_set_iface_flags(drv, buf, 1))
goto error;
memset(&ll, 0, sizeof(ll));
ll.sll_family = AF_PACKET;
ll.sll_ifindex = drv->monitor_ifidx;
drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (drv->monitor_sock < 0) {
perror("socket[PF_PACKET,SOCK_RAW]");
goto error;
}
if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
sizeof(ll)) < 0) {
perror("monitor socket bind");
goto error;
}
optlen = sizeof(optval);
optval = 20;
if (setsockopt
(drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
perror("Failed to set socket priority");
goto error;
}
if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
drv, NULL)) {
printf("Could not register monitor read socket\n");
goto error;
}
return 0;
error:
nl80211_remove_iface(drv, drv->monitor_ifidx);
return -1;
}
static int nl80211_set_master_mode(struct i802_driver_data *drv,
const char *ifname)
{
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_INTERFACE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(ifname));
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
nl_wait_for_ack(drv->nl_handle) < 0) {
nla_put_failure:
wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
"mode.", ifname);
nlmsg_free(msg);
return -1;
}
nlmsg_free(msg);
return 0;
}
static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
{
struct ifreq ifr;
struct sockaddr_ll addr;
drv->ioctl_sock = -1;
drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->ioctl_sock < 0) {
perror("socket[PF_INET,SOCK_DGRAM]");
return -1;
}
/* start listening for EAPOL on the default AP interface */
add_ifidx(drv, if_nametoindex(drv->iface));
if (hostapd_set_iface_flags(drv, drv->iface, 0))
return -1;
if (bssid) {
os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
perror("ioctl(SIOCSIFHWADDR)");
return -1;
}
}
/*
* initialise generic netlink and nl80211
*/
drv->nl_handle = nl_handle_alloc();
if (!drv->nl_handle) {
printf("Failed to allocate netlink handle.\n");
return -1;
}
if (genl_connect(drv->nl_handle)) {
printf("Failed to connect to generic netlink.\n");
return -1;
}
drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
if (!drv->nl_cache) {
printf("Failed to allocate generic netlink cache.\n");
return -1;
}
drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
if (!drv->nl80211) {
printf("nl80211 not found.\n");
return -1;
}
/* Initialise a monitor interface */
if (nl80211_create_monitor_interface(drv))
return -1;
if (nl80211_set_master_mode(drv, drv->iface))
return -1;
if (hostapd_set_iface_flags(drv, drv->iface, 1))
return -1;
memset(&addr, 0, sizeof(addr));
addr.sll_family = AF_PACKET;
addr.sll_ifindex = ifr.ifr_ifindex;
wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
addr.sll_ifindex);
drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
if (drv->eapol_sock < 0) {
perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
return -1;
}
if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
{
printf("Could not register read socket for eapol\n");
return -1;
}
memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
perror("ioctl(SIOCGIFHWADDR)");
return -1;
}
if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
printf("Invalid HW-addr family 0x%04x\n",
ifr.ifr_hwaddr.sa_family);
return -1;
}
memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
return 0;
}
static int i802_get_inact_sec(void *priv, const u8 *addr)
{
struct hostap_sta_driver_data data;
int ret;
data.inactive_msec = (unsigned long) -1;
ret = i802_read_sta_data(priv, &data, addr);
if (ret || data.inactive_msec == (unsigned long) -1)
return -1;
return data.inactive_msec / 1000;
}
static int i802_sta_clear_stats(void *priv, const u8 *addr)
{
#if 0
/* TODO */
#endif
return 0;
}
static void
hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
char *custom)
{
wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
char *pos;
u8 addr[ETH_ALEN];
pos = strstr(custom, "addr=");
if (pos == NULL) {
wpa_printf(MSG_DEBUG,
"MLME-MICHAELMICFAILURE.indication "
"without sender address ignored");
return;
}
pos += 5;
if (hwaddr_aton(pos, addr) == 0) {
ieee80211_michael_mic_failure(drv->hapd, addr, 1);
} else {
wpa_printf(MSG_DEBUG,
"MLME-MICHAELMICFAILURE.indication "
"with invalid MAC address");
}
}
}
static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
char *data, int len)
{
struct iw_event iwe_buf, *iwe = &iwe_buf;
char *pos, *end, *custom, *buf;
pos = data;
end = data + len;
while (pos + IW_EV_LCP_LEN <= end) {
/* Event data may be unaligned, so make a local, aligned copy
* before processing. */
memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
iwe->cmd, iwe->len);
if (iwe->len <= IW_EV_LCP_LEN)
return;
custom = pos + IW_EV_POINT_LEN;
if (drv->we_version > 18 &&
(iwe->cmd == IWEVMICHAELMICFAILURE ||
iwe->cmd == IWEVCUSTOM)) {
/* WE-19 removed the pointer from struct iw_point */
char *dpos = (char *) &iwe_buf.u.data.length;
int dlen = dpos - (char *) &iwe_buf;
memcpy(dpos, pos + IW_EV_LCP_LEN,
sizeof(struct iw_event) - dlen);
} else {
memcpy(&iwe_buf, pos, sizeof(struct iw_event));
custom += IW_EV_POINT_OFF;
}
switch (iwe->cmd) {
case IWEVCUSTOM:
if (custom + iwe->u.data.length > end)
return;
buf = malloc(iwe->u.data.length + 1);
if (buf == NULL)
return;
memcpy(buf, custom, iwe->u.data.length);
buf[iwe->u.data.length] = '\0';
hostapd_wireless_event_wireless_custom(drv, buf);
free(buf);
break;
}
pos += iwe->len;
}
}
static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
struct nlmsghdr *h, int len)
{
struct ifinfomsg *ifi;
int attrlen, nlmsg_len, rta_len;
struct rtattr *attr;
if (len < (int) sizeof(*ifi))
return;
ifi = NLMSG_DATA(h);
/* TODO: use ifi->ifi_index to filter out wireless events from other
* interfaces */
nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
attrlen = h->nlmsg_len - nlmsg_len;
if (attrlen < 0)
return;
attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_WIRELESS) {
hostapd_wireless_event_wireless(
drv, ((char *) attr) + rta_len,
attr->rta_len - rta_len);
}
attr = RTA_NEXT(attr, attrlen);
}
}
static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
void *sock_ctx)
{
char buf[256];
int left;
struct sockaddr_nl from;
socklen_t fromlen;
struct nlmsghdr *h;
struct i802_driver_data *drv = eloop_ctx;
fromlen = sizeof(from);
left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
(struct sockaddr *) &from, &fromlen);
if (left < 0) {
if (errno != EINTR && errno != EAGAIN)
perror("recvfrom(netlink)");
return;
}
h = (struct nlmsghdr *) buf;
while (left >= (int) sizeof(*h)) {
int len, plen;
len = h->nlmsg_len;
plen = len - sizeof(*h);
if (len > left || plen < 0) {
printf("Malformed netlink message: "
"len=%d left=%d plen=%d\n",
len, left, plen);
break;
}
switch (h->nlmsg_type) {
case RTM_NEWLINK:
hostapd_wireless_event_rtm_newlink(drv, h, plen);
break;
}
len = NLMSG_ALIGN(len);
left -= len;
h = (struct nlmsghdr *) ((char *) h + len);
}
if (left > 0) {
printf("%d extra bytes in the end of netlink message\n", left);
}
}
static int hostap_get_we_version(struct i802_driver_data *drv)
{
struct iw_range *range;
struct iwreq iwr;
int minlen;
size_t buflen;
drv->we_version = 0;
/*
* Use larger buffer than struct iw_range in order to allow the
* structure to grow in the future.
*/
buflen = sizeof(struct iw_range) + 500;
range = os_zalloc(buflen);
if (range == NULL)
return -1;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
iwr.u.data.pointer = (caddr_t) range;
iwr.u.data.length = buflen;
minlen = ((char *) &range->enc_capa) - (char *) range +
sizeof(range->enc_capa);
if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
perror("ioctl[SIOCGIWRANGE]");
free(range);
return -1;
} else if (iwr.u.data.length >= minlen &&
range->we_version_compiled >= 18) {
wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
"WE(source)=%d enc_capa=0x%x",
range->we_version_compiled,
range->we_version_source,
range->enc_capa);
drv->we_version = range->we_version_compiled;
}
free(range);
return 0;
}
static int i802_wireless_event_init(void *priv)
{
struct i802_driver_data *drv = priv;
int s;
struct sockaddr_nl local;
hostap_get_we_version(drv);
drv->wext_sock = -1;
s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (s < 0) {
perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
return -1;
}
memset(&local, 0, sizeof(local));
local.nl_family = AF_NETLINK;
local.nl_groups = RTMGRP_LINK;
if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
perror("bind(netlink)");
close(s);
return -1;
}
eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
NULL);
drv->wext_sock = s;
return 0;
}
static void i802_wireless_event_deinit(void *priv)
{
struct i802_driver_data *drv = priv;
if (drv->wext_sock < 0)
return;
eloop_unregister_read_sock(drv->wext_sock);
close(drv->wext_sock);
}
static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
{
struct i802_driver_data *drv = priv;
struct ieee80211_mgmt mgmt;
memset(&mgmt, 0, sizeof(mgmt));
mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_DEAUTH);
memcpy(mgmt.da, addr, ETH_ALEN);
memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
mgmt.u.deauth.reason_code = host_to_le16(reason);
return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
sizeof(mgmt.u.deauth), 0);
}
static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
{
struct i802_driver_data *drv = priv;
struct ieee80211_mgmt mgmt;
memset(&mgmt, 0, sizeof(mgmt));
mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_DISASSOC);
memcpy(mgmt.da, addr, ETH_ALEN);
memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
mgmt.u.disassoc.reason_code = host_to_le16(reason);
return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
sizeof(mgmt.u.disassoc), 0);
}
static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
{
struct i802_driver_data *drv;
drv = os_zalloc(sizeof(struct i802_driver_data));
if (drv == NULL) {
printf("Could not allocate memory for i802 driver data\n");
return NULL;
}
drv->hapd = hapd;
memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
drv->if_indices = drv->default_if_indices;
drv->bridge = if_nametoindex(hapd->conf->bridge);
if (i802_init_sockets(drv, bssid))
goto failed;
return drv;
failed:
free(drv);
return NULL;
}
static void *i802_init(struct hostapd_data *hapd)
{
return i802_init_bssid(hapd, NULL);
}
static void i802_deinit(void *priv)
{
struct i802_driver_data *drv = priv;
i802_del_beacon(drv);
/* remove monitor interface */
nl80211_remove_iface(drv, drv->monitor_ifidx);
(void) hostapd_set_iface_flags(drv, drv->iface, 0);
if (drv->monitor_sock >= 0) {
eloop_unregister_read_sock(drv->monitor_sock);
close(drv->monitor_sock);
}
if (drv->ioctl_sock >= 0)
close(drv->ioctl_sock);
if (drv->eapol_sock >= 0) {
eloop_unregister_read_sock(drv->eapol_sock);
close(drv->eapol_sock);
}
genl_family_put(drv->nl80211);
nl_cache_free(drv->nl_cache);
nl_handle_destroy(drv->nl_handle);
if (drv->if_indices != drv->default_if_indices)
free(drv->if_indices);
free(drv);
}
const struct wpa_driver_ops wpa_driver_nl80211_ops = {
.name = "nl80211",
.init = i802_init,
.init_bssid = i802_init_bssid,
.deinit = i802_deinit,
.wireless_event_init = i802_wireless_event_init,
.wireless_event_deinit = i802_wireless_event_deinit,
.set_ieee8021x = i802_set_ieee8021x,
.set_privacy = i802_set_privacy,
.set_encryption = i802_set_encryption,
.get_seqnum = i802_get_seqnum,
.flush = i802_flush,
.read_sta_data = i802_read_sta_data,
.send_eapol = i802_send_eapol,
.sta_set_flags = i802_sta_set_flags,
.sta_deauth = i802_sta_deauth,
.sta_disassoc = i802_sta_disassoc,
.sta_remove = i802_sta_remove,
.set_ssid = i802_set_ssid,
.send_mgmt_frame = i802_send_mgmt_frame,
.sta_add = i802_sta_add,
.get_inact_sec = i802_get_inact_sec,
.sta_clear_stats = i802_sta_clear_stats,
.set_freq = i802_set_freq,
.set_rts = i802_set_rts,
.get_rts = i802_get_rts,
.set_frag = i802_set_frag,
.get_frag = i802_get_frag,
.set_retry = i802_set_retry,
.get_retry = i802_get_retry,
.set_rate_sets = i802_set_rate_sets,
.set_channel_flag = i802_set_channel_flag,
.set_regulatory_domain = i802_set_regulatory_domain,
.set_beacon = i802_set_beacon,
.set_internal_bridge = i802_set_internal_bridge,
.set_beacon_int = i802_set_beacon_int,
.set_dtim_period = i802_set_dtim_period,
.set_cts_protect = i802_set_cts_protect,
.set_preamble = i802_set_preamble,
.set_short_slot_time = i802_set_short_slot_time,
.set_tx_queue_params = i802_set_tx_queue_params,
.bss_add = i802_bss_add,
.bss_remove = i802_bss_remove,
.if_add = i802_if_add,
.if_update = i802_if_update,
.if_remove = i802_if_remove,
.get_hw_feature_data = i802_get_hw_feature_data,
.set_sta_vlan = i802_set_sta_vlan,
};
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