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fragattacks/hostapd/driver_hostap.c
Jouni Malinen f49275c92f Fixed build without CONFIG_IEEE80211N
2009-01-12 22:08:53 +02:00

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/*
* hostapd / Kernel driver communication with Linux Host AP driver
* Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
*
* 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>
#ifdef USE_KERNEL_HEADERS
/* compat-wireless does not include linux/compiler.h to define __user, so
* define it here */
#ifndef __user
#define __user
#endif /* __user */
#include <asm/types.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h> /* The L2 protocols */
#include <linux/if_arp.h>
#include <linux/wireless.h>
#else /* USE_KERNEL_HEADERS */
#include <net/if_arp.h>
#include <netpacket/packet.h>
#include "wireless_copy.h"
#endif /* USE_KERNEL_HEADERS */
#include "hostapd.h"
#include "driver.h"
#include "eloop.h"
#include "priv_netlink.h"
#include "hostap_common.h"
#include "hw_features.h"
#include "ieee802_11_defs.h"
static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
struct hostap_driver_data {
struct hostapd_data *hapd;
char iface[IFNAMSIZ + 1];
int sock; /* raw packet socket for driver access */
int ioctl_sock; /* socket for ioctl() use */
int wext_sock; /* socket for wireless events */
int we_version;
u8 *generic_ie;
size_t generic_ie_len;
u8 *wps_ie;
size_t wps_ie_len;
};
static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
int len);
static int hostap_set_iface_flags(void *priv, int dev_up);
static int hostap_sta_disassoc(void *priv, const u8 *addr, int reason);
static int hostap_sta_deauth(void *priv, const u8 *addr, int reason);
static void handle_data(struct hostap_driver_data *drv, u8 *buf, size_t len,
u16 stype)
{
struct ieee80211_hdr *hdr;
u16 fc, ethertype;
u8 *pos, *sa;
size_t left;
if (len < sizeof(struct ieee80211_hdr))
return;
hdr = (struct ieee80211_hdr *) buf;
fc = le_to_host16(hdr->frame_control);
if ((fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) != WLAN_FC_TODS) {
printf("Not ToDS data frame (fc=0x%04x)\n", fc);
return;
}
sa = hdr->addr2;
hostapd_rx_from_unknown_sta(drv->hapd, sa);
pos = (u8 *) (hdr + 1);
left = len - sizeof(*hdr);
if (left < sizeof(rfc1042_header)) {
printf("Too short data frame\n");
return;
}
if (memcmp(pos, rfc1042_header, sizeof(rfc1042_header)) != 0) {
printf("Data frame with no RFC1042 header\n");
return;
}
pos += sizeof(rfc1042_header);
left -= sizeof(rfc1042_header);
if (left < 2) {
printf("No ethertype in data frame\n");
return;
}
ethertype = WPA_GET_BE16(pos);
pos += 2;
left -= 2;
switch (ethertype) {
case ETH_P_PAE:
hostapd_eapol_receive(drv->hapd, sa, pos, left);
break;
default:
printf("Unknown ethertype 0x%04x in data frame\n", ethertype);
break;
}
}
static void handle_tx_callback(struct hostap_driver_data *drv, u8 *buf,
size_t len, int ok)
{
struct ieee80211_hdr *hdr;
u16 fc, type, stype;
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");
hostapd_mgmt_tx_cb(drv->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");
hostapd_tx_status(drv->hapd, hdr->addr1, buf, len, ok);
break;
default:
printf("unknown TX callback frame type %d\n", type);
break;
}
}
static void handle_frame(struct hostap_driver_data *drv, u8 *buf, size_t len)
{
struct ieee80211_hdr *hdr;
u16 fc, extra_len, type, stype;
unsigned char *extra = NULL;
size_t data_len = len;
int ver;
/* PSPOLL is only 16 bytes, but driver does not (at least yet) pass
* these to user space */
if (len < 24) {
wpa_printf(MSG_MSGDUMP, "handle_frame: too short (%lu)",
(unsigned long) len);
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);
if (type != WLAN_FC_TYPE_MGMT || stype != WLAN_FC_STYPE_BEACON) {
wpa_hexdump(MSG_MSGDUMP, "Received management frame",
buf, len);
}
ver = fc & WLAN_FC_PVER;
/* protocol version 3 is reserved for indicating extra data after the
* payload, version 2 for indicating ACKed frame (TX callbacks), and
* version 1 for indicating failed frame (no ACK, TX callbacks) */
if (ver == 3) {
u8 *pos = buf + len - 2;
extra_len = WPA_GET_LE16(pos);
printf("extra data in frame (elen=%d)\n", extra_len);
if ((size_t) extra_len + 2 > len) {
printf(" extra data overflow\n");
return;
}
len -= extra_len + 2;
extra = buf + len;
} else if (ver == 1 || ver == 2) {
handle_tx_callback(drv, buf, data_len, ver == 2 ? 1 : 0);
return;
} else if (ver != 0) {
printf("unknown protocol version %d\n", ver);
return;
}
switch (type) {
case WLAN_FC_TYPE_MGMT:
if (stype != WLAN_FC_STYPE_BEACON)
wpa_printf(MSG_MSGDUMP, "MGMT");
hostapd_mgmt_rx(drv->hapd, buf, data_len, stype, NULL);
break;
case WLAN_FC_TYPE_CTRL:
wpa_printf(MSG_DEBUG, "CTRL");
break;
case WLAN_FC_TYPE_DATA:
wpa_printf(MSG_DEBUG, "DATA");
handle_data(drv, buf, data_len, stype);
break;
default:
wpa_printf(MSG_DEBUG, "unknown frame type %d", type);
break;
}
}
static void handle_read(int sock, void *eloop_ctx, void *sock_ctx)
{
struct hostap_driver_data *drv = eloop_ctx;
int len;
unsigned char buf[3000];
len = recv(sock, buf, sizeof(buf), 0);
if (len < 0) {
perror("recv");
return;
}
handle_frame(drv, buf, len);
}
static int hostap_init_sockets(struct hostap_driver_data *drv)
{
struct ifreq ifr;
struct sockaddr_ll addr;
drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (drv->sock < 0) {
perror("socket[PF_PACKET,SOCK_RAW]");
return -1;
}
if (eloop_register_read_sock(drv->sock, handle_read, drv, NULL)) {
printf("Could not register read socket\n");
return -1;
}
memset(&ifr, 0, sizeof(ifr));
snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%sap", drv->iface);
if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
perror("ioctl(SIOCGIFINDEX)");
return -1;
}
if (hostap_set_iface_flags(drv, 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);
if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("bind");
return -1;
}
memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
if (ioctl(drv->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 hostap_send_mgmt_frame(void *priv, const void *msg, size_t len,
int flags)
{
struct hostap_driver_data *drv = priv;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg;
int res;
/* Request TX callback */
hdr->frame_control |= host_to_le16(BIT(1));
res = send(drv->sock, msg, len, flags);
hdr->frame_control &= ~host_to_le16(BIT(1));
return res;
}
static int hostap_send_eapol(void *priv, const u8 *addr, const u8 *data,
size_t data_len, int encrypt, const u8 *own_addr)
{
struct hostap_driver_data *drv = priv;
struct ieee80211_hdr *hdr;
size_t len;
u8 *pos;
int res;
len = sizeof(*hdr) + sizeof(rfc1042_header) + 2 + data_len;
hdr = os_zalloc(len);
if (hdr == NULL) {
printf("malloc() failed for hostapd_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);
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);
memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
pos += sizeof(rfc1042_header);
*((u16 *) pos) = htons(ETH_P_PAE);
pos += 2;
memcpy(pos, data, data_len);
res = hostap_send_mgmt_frame(drv, (u8 *) hdr, len, 0);
free(hdr);
if (res < 0) {
perror("hostapd_send_eapol: send");
printf("hostapd_send_eapol - packet len: %lu - failed\n",
(unsigned long) len);
}
return res;
}
static int hostap_sta_set_flags(void *priv, const u8 *addr,
int total_flags, int flags_or, int flags_and)
{
struct hostap_driver_data *drv = priv;
struct prism2_hostapd_param param;
memset(&param, 0, sizeof(param));
param.cmd = PRISM2_HOSTAPD_SET_FLAGS_STA;
memcpy(param.sta_addr, addr, ETH_ALEN);
param.u.set_flags_sta.flags_or = flags_or;
param.u.set_flags_sta.flags_and = flags_and;
return hostapd_ioctl(drv, &param, sizeof(param));
}
static int hostap_set_iface_flags(void *priv, int dev_up)
{
struct hostap_driver_data *drv = priv;
struct ifreq ifr;
if (drv->ioctl_sock < 0)
return -1;
memset(&ifr, 0, sizeof(ifr));
snprintf(ifr.ifr_name, IFNAMSIZ, "%sap", drv->iface);
if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
perror("ioctl[SIOCGIFFLAGS]");
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;
}
if (dev_up) {
memset(&ifr, 0, sizeof(ifr));
snprintf(ifr.ifr_name, IFNAMSIZ, "%sap", drv->iface);
ifr.ifr_mtu = HOSTAPD_MTU;
if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
perror("ioctl[SIOCSIFMTU]");
printf("Setting MTU failed - trying to survive with "
"current value\n");
}
}
return 0;
}
static int hostapd_ioctl(void *priv, struct prism2_hostapd_param *param,
int len)
{
struct hostap_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
iwr.u.data.pointer = (caddr_t) param;
iwr.u.data.length = len;
if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_HOSTAPD, &iwr) < 0) {
perror("ioctl[PRISM2_IOCTL_HOSTAPD]");
return -1;
}
return 0;
}
static int hostap_set_encryption(const char *ifname, void *priv,
const char *alg, const u8 *addr,
int idx, const u8 *key, size_t key_len,
int txkey)
{
struct hostap_driver_data *drv = priv;
struct prism2_hostapd_param *param;
u8 *buf;
size_t blen;
int ret = 0;
blen = sizeof(*param) + key_len;
buf = os_zalloc(blen);
if (buf == NULL)
return -1;
param = (struct prism2_hostapd_param *) buf;
param->cmd = PRISM2_SET_ENCRYPTION;
if (addr == NULL)
memset(param->sta_addr, 0xff, ETH_ALEN);
else
memcpy(param->sta_addr, addr, ETH_ALEN);
os_strlcpy((char *) param->u.crypt.alg, alg,
HOSTAP_CRYPT_ALG_NAME_LEN);
param->u.crypt.flags = txkey ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
param->u.crypt.idx = idx;
param->u.crypt.key_len = key_len;
memcpy((u8 *) (param + 1), key, key_len);
if (hostapd_ioctl(drv, param, blen)) {
printf("Failed to set encryption.\n");
ret = -1;
}
free(buf);
return ret;
}
static int hostap_get_seqnum(const char *ifname, void *priv, const u8 *addr,
int idx, u8 *seq)
{
struct hostap_driver_data *drv = priv;
struct prism2_hostapd_param *param;
u8 *buf;
size_t blen;
int ret = 0;
blen = sizeof(*param) + 32;
buf = os_zalloc(blen);
if (buf == NULL)
return -1;
param = (struct prism2_hostapd_param *) buf;
param->cmd = PRISM2_GET_ENCRYPTION;
if (addr == NULL)
memset(param->sta_addr, 0xff, ETH_ALEN);
else
memcpy(param->sta_addr, addr, ETH_ALEN);
param->u.crypt.idx = idx;
if (hostapd_ioctl(drv, param, blen)) {
printf("Failed to get encryption.\n");
ret = -1;
} else {
memcpy(seq, param->u.crypt.seq, 8);
}
free(buf);
return ret;
}
static int hostap_ioctl_prism2param(void *priv, int param, int value)
{
struct hostap_driver_data *drv = priv;
struct iwreq iwr;
int *i;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
i = (int *) iwr.u.name;
*i++ = param;
*i++ = value;
if (ioctl(drv->ioctl_sock, PRISM2_IOCTL_PRISM2_PARAM, &iwr) < 0) {
perror("ioctl[PRISM2_IOCTL_PRISM2_PARAM]");
return -1;
}
return 0;
}
static int hostap_set_ieee8021x(const char *ifname, void *priv, int enabled)
{
struct hostap_driver_data *drv = priv;
/* enable kernel driver support for IEEE 802.1X */
if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_IEEE_802_1X, enabled)) {
printf("Could not setup IEEE 802.1X support in kernel driver."
"\n");
return -1;
}
if (!enabled)
return 0;
/* use host driver implementation of encryption to allow
* individual keys and passing plaintext EAPOL frames */
if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_DECRYPT, 1) ||
hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOST_ENCRYPT, 1)) {
printf("Could not setup host-based encryption in kernel "
"driver.\n");
return -1;
}
return 0;
}
static int hostap_set_privacy(const char *ifname, void *priv, int enabled)
{
struct hostap_drvier_data *drv = priv;
return hostap_ioctl_prism2param(drv, PRISM2_PARAM_PRIVACY_INVOKED,
enabled);
}
static int hostap_set_ssid(const char *ifname, void *priv, const u8 *buf,
int len)
{
struct hostap_driver_data *drv = priv;
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
iwr.u.essid.flags = 1; /* SSID active */
iwr.u.essid.pointer = (caddr_t) buf;
iwr.u.essid.length = len + 1;
if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
perror("ioctl[SIOCSIWESSID]");
printf("len=%d\n", len);
return -1;
}
return 0;
}
static int hostap_flush(void *priv)
{
struct hostap_driver_data *drv = priv;
struct prism2_hostapd_param param;
memset(&param, 0, sizeof(param));
param.cmd = PRISM2_HOSTAPD_FLUSH;
return hostapd_ioctl(drv, &param, sizeof(param));
}
static int hostap_read_sta_data(void *priv,
struct hostap_sta_driver_data *data,
const u8 *addr)
{
struct hostap_driver_data *drv = priv;
char buf[1024], line[128], *pos;
FILE *f;
unsigned long val;
memset(data, 0, sizeof(*data));
snprintf(buf, sizeof(buf), "/proc/net/hostap/%s/" MACSTR,
drv->iface, MAC2STR(addr));
f = fopen(buf, "r");
if (!f)
return -1;
/* Need to read proc file with in one piece, so use large enough
* buffer. */
setbuffer(f, buf, sizeof(buf));
while (fgets(line, sizeof(line), f)) {
pos = strchr(line, '=');
if (!pos)
continue;
*pos++ = '\0';
val = strtoul(pos, NULL, 10);
if (strcmp(line, "rx_packets") == 0)
data->rx_packets = val;
else if (strcmp(line, "tx_packets") == 0)
data->tx_packets = val;
else if (strcmp(line, "rx_bytes") == 0)
data->rx_bytes = val;
else if (strcmp(line, "tx_bytes") == 0)
data->tx_bytes = val;
}
fclose(f);
return 0;
}
static int hostap_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 hostap_driver_data *drv = priv;
struct prism2_hostapd_param param;
int tx_supp_rates = 0;
size_t i;
#define WLAN_RATE_1M BIT(0)
#define WLAN_RATE_2M BIT(1)
#define WLAN_RATE_5M5 BIT(2)
#define WLAN_RATE_11M BIT(3)
for (i = 0; i < supp_rates_len; i++) {
if ((supp_rates[i] & 0x7f) == 2)
tx_supp_rates |= WLAN_RATE_1M;
if ((supp_rates[i] & 0x7f) == 4)
tx_supp_rates |= WLAN_RATE_2M;
if ((supp_rates[i] & 0x7f) == 11)
tx_supp_rates |= WLAN_RATE_5M5;
if ((supp_rates[i] & 0x7f) == 22)
tx_supp_rates |= WLAN_RATE_11M;
}
memset(&param, 0, sizeof(param));
param.cmd = PRISM2_HOSTAPD_ADD_STA;
memcpy(param.sta_addr, addr, ETH_ALEN);
param.u.add_sta.aid = aid;
param.u.add_sta.capability = capability;
param.u.add_sta.tx_supp_rates = tx_supp_rates;
return hostapd_ioctl(drv, &param, sizeof(param));
}
static int hostap_sta_remove(void *priv, const u8 *addr)
{
struct hostap_driver_data *drv = priv;
struct prism2_hostapd_param param;
hostap_sta_set_flags(drv, addr, 0, 0, ~WLAN_STA_AUTHORIZED);
memset(&param, 0, sizeof(param));
param.cmd = PRISM2_HOSTAPD_REMOVE_STA;
memcpy(param.sta_addr, addr, ETH_ALEN);
if (hostapd_ioctl(drv, &param, sizeof(param))) {
printf("Could not remove station from kernel driver.\n");
return -1;
}
return 0;
}
static int hostap_get_inact_sec(void *priv, const u8 *addr)
{
struct hostap_driver_data *drv = priv;
struct prism2_hostapd_param param;
memset(&param, 0, sizeof(param));
param.cmd = PRISM2_HOSTAPD_GET_INFO_STA;
memcpy(param.sta_addr, addr, ETH_ALEN);
if (hostapd_ioctl(drv, &param, sizeof(param))) {
return -1;
}
return param.u.get_info_sta.inactive_sec;
}
static int hostap_sta_clear_stats(void *priv, const u8 *addr)
{
struct hostap_driver_data *drv = priv;
struct prism2_hostapd_param param;
memset(&param, 0, sizeof(param));
param.cmd = PRISM2_HOSTAPD_STA_CLEAR_STATS;
memcpy(param.sta_addr, addr, ETH_ALEN);
if (hostapd_ioctl(drv, &param, sizeof(param))) {
return -1;
}
return 0;
}
static int hostap_set_assoc_ap(void *priv, const u8 *addr)
{
struct hostap_driver_data *drv = priv;
struct prism2_hostapd_param param;
memset(&param, 0, sizeof(param));
param.cmd = PRISM2_HOSTAPD_SET_ASSOC_AP_ADDR;
memcpy(param.sta_addr, addr, ETH_ALEN);
if (hostapd_ioctl(drv, &param, sizeof(param)))
return -1;
return 0;
}
static int hostapd_ioctl_set_generic_elem(struct hostap_driver_data *drv)
{
struct prism2_hostapd_param *param;
int res;
size_t blen, elem_len;
elem_len = drv->generic_ie_len + drv->wps_ie_len;
blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + elem_len;
if (blen < sizeof(*param))
blen = sizeof(*param);
param = os_zalloc(blen);
if (param == NULL)
return -1;
param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
param->u.generic_elem.len = elem_len;
if (drv->generic_ie) {
os_memcpy(param->u.generic_elem.data, drv->generic_ie,
drv->generic_ie_len);
}
if (drv->wps_ie) {
os_memcpy(&param->u.generic_elem.data[drv->generic_ie_len],
drv->wps_ie, drv->wps_ie_len);
}
wpa_hexdump(MSG_DEBUG, "hostap: Set generic IE",
param->u.generic_elem.data, elem_len);
res = hostapd_ioctl(drv, param, blen);
os_free(param);
return res;
}
static int hostap_set_generic_elem(const char *ifname, void *priv,
const u8 *elem, size_t elem_len)
{
struct hostap_driver_data *drv = priv;
os_free(drv->generic_ie);
drv->generic_ie = NULL;
drv->generic_ie_len = 0;
if (elem) {
drv->generic_ie = os_malloc(elem_len);
if (drv->generic_ie == NULL)
return -1;
os_memcpy(drv->generic_ie, elem, elem_len);
drv->generic_ie_len = elem_len;
}
return hostapd_ioctl_set_generic_elem(drv);
}
static int hostap_set_wps_beacon_ie(const char *ifname, void *priv,
const u8 *ie, size_t len)
{
/* Host AP driver supports only one set of extra IEs, so we need to
* use the ProbeResp IEs also for Beacon frames since they include more
* information. */
return 0;
}
static int hostap_set_wps_probe_resp_ie(const char *ifname, void *priv,
const u8 *ie, size_t len)
{
struct hostap_driver_data *drv = priv;
os_free(drv->wps_ie);
drv->wps_ie = NULL;
drv->wps_ie_len = 0;
if (ie) {
drv->wps_ie = os_malloc(len);
if (drv->wps_ie == NULL)
return -1;
os_memcpy(drv->wps_ie, ie, len);
drv->wps_ie_len = len;
}
return hostapd_ioctl_set_generic_elem(drv);
}
static void
hostapd_wireless_event_wireless_custom(struct hostap_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) {
hostapd_michael_mic_failure(drv->hapd, addr);
} else {
wpa_printf(MSG_DEBUG,
"MLME-MICHAELMICFAILURE.indication "
"with invalid MAC address");
}
}
}
static void hostapd_wireless_event_wireless(struct hostap_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 hostap_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 hostap_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 hostap_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 hostap_wireless_event_init(void *priv)
{
struct hostap_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 hostap_wireless_event_deinit(void *priv)
{
struct hostap_driver_data *drv = priv;
if (drv->wext_sock < 0)
return;
eloop_unregister_read_sock(drv->wext_sock);
close(drv->wext_sock);
}
static void * hostap_init(struct hostapd_data *hapd)
{
struct hostap_driver_data *drv;
drv = os_zalloc(sizeof(struct hostap_driver_data));
if (drv == NULL) {
printf("Could not allocate memory for hostapd driver data\n");
return NULL;
}
drv->hapd = hapd;
drv->ioctl_sock = drv->sock = -1;
memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->ioctl_sock < 0) {
perror("socket[PF_INET,SOCK_DGRAM]");
free(drv);
return NULL;
}
if (hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 1)) {
printf("Could not enable hostapd mode for interface %s\n",
drv->iface);
close(drv->ioctl_sock);
free(drv);
return NULL;
}
if (hostap_init_sockets(drv)) {
close(drv->ioctl_sock);
free(drv);
return NULL;
}
return drv;
}
static void hostap_driver_deinit(void *priv)
{
struct hostap_driver_data *drv = priv;
(void) hostap_set_iface_flags(drv, 0);
(void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD, 0);
(void) hostap_ioctl_prism2param(drv, PRISM2_PARAM_HOSTAPD_STA, 0);
if (drv->ioctl_sock >= 0)
close(drv->ioctl_sock);
if (drv->sock >= 0)
close(drv->sock);
os_free(drv->generic_ie);
os_free(drv->wps_ie);
free(drv);
}
static int hostap_sta_deauth(void *priv, const u8 *addr, int reason)
{
struct hostap_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 hostap_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
sizeof(mgmt.u.deauth), 0);
}
static int hostap_sta_disassoc(void *priv, const u8 *addr, int reason)
{
struct hostap_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 hostap_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
sizeof(mgmt.u.disassoc), 0);
}
static struct hostapd_hw_modes * hostap_get_hw_feature_data(void *priv,
u16 *num_modes,
u16 *flags)
{
struct hostapd_hw_modes *mode;
int i, clen, rlen;
const short chan2freq[14] = {
2412, 2417, 2422, 2427, 2432, 2437, 2442,
2447, 2452, 2457, 2462, 2467, 2472, 2484
};
mode = os_zalloc(sizeof(struct hostapd_hw_modes));
if (mode == NULL)
return NULL;
*num_modes = 1;
*flags = 0;
mode->mode = HOSTAPD_MODE_IEEE80211B;
mode->num_channels = 14;
mode->num_rates = 4;
clen = mode->num_channels * sizeof(struct hostapd_channel_data);
rlen = mode->num_rates * sizeof(struct hostapd_rate_data);
mode->channels = os_zalloc(clen);
mode->rates = os_zalloc(rlen);
if (mode->channels == NULL || mode->rates == NULL) {
hostapd_free_hw_features(mode, *num_modes);
return NULL;
}
for (i = 0; i < 14; i++) {
mode->channels[i].chan = i + 1;
mode->channels[i].freq = chan2freq[i];
/* TODO: Get allowed channel list from the driver */
if (i >= 11)
mode->channels[i].flag = HOSTAPD_CHAN_DISABLED;
}
mode->rates[0].rate = 10;
mode->rates[0].flags = HOSTAPD_RATE_CCK;
mode->rates[1].rate = 20;
mode->rates[1].flags = HOSTAPD_RATE_CCK;
mode->rates[2].rate = 55;
mode->rates[2].flags = HOSTAPD_RATE_CCK;
mode->rates[3].rate = 110;
mode->rates[3].flags = HOSTAPD_RATE_CCK;
return mode;
}
const struct wpa_driver_ops wpa_driver_hostap_ops = {
.name = "hostap",
.init = hostap_init,
.deinit = hostap_driver_deinit,
.wireless_event_init = hostap_wireless_event_init,
.wireless_event_deinit = hostap_wireless_event_deinit,
.set_ieee8021x = hostap_set_ieee8021x,
.set_privacy = hostap_set_privacy,
.set_encryption = hostap_set_encryption,
.get_seqnum = hostap_get_seqnum,
.flush = hostap_flush,
.set_generic_elem = hostap_set_generic_elem,
.read_sta_data = hostap_read_sta_data,
.send_eapol = hostap_send_eapol,
.sta_set_flags = hostap_sta_set_flags,
.sta_deauth = hostap_sta_deauth,
.sta_disassoc = hostap_sta_disassoc,
.sta_remove = hostap_sta_remove,
.set_ssid = hostap_set_ssid,
.send_mgmt_frame = hostap_send_mgmt_frame,
.set_assoc_ap = hostap_set_assoc_ap,
.sta_add = hostap_sta_add,
.get_inact_sec = hostap_get_inact_sec,
.sta_clear_stats = hostap_sta_clear_stats,
.get_hw_feature_data = hostap_get_hw_feature_data,
.set_wps_beacon_ie = hostap_set_wps_beacon_ie,
.set_wps_probe_resp_ie = hostap_set_wps_probe_resp_ie,
};
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