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fragattacks/hostapd/driver_prism54.c

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/*
* hostapd / Driver interaction with Prism54 PIMFOR interface
* Copyright (c) 2004, Bell Kin <bell_kin@pek.com.tw>
* based on hostap driver.c, ieee802_11.c
* Copyright (c) 2002-2007, 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>
#include <sys/select.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 "config.h"
#include "driver.h"
#include "ieee802_1x.h"
#include "eloop.h"
#include "ieee802_11.h"
#include "prism54.h"
#include "wpa.h"
#include "radius/radius.h"
#include "sta_info.h"
#include "accounting.h"
const int PIM_BUF_SIZE = 4096;
struct prism54_driver_data {
struct hostapd_data *hapd;
char iface[IFNAMSIZ + 1];
int sock; /* raw packet socket for 802.3 access */
int pim_sock; /* socket for pimfor packet */
char macs[2007][6];
};
static int mac_id_refresh(struct prism54_driver_data *data, int id, char *mac)
{
if (id < 0 || id > 2006) {
return -1;
}
memcpy(&data->macs[id][0], mac, ETH_ALEN);
return 0;
}
static char * mac_id_get(struct prism54_driver_data *data, int id)
{
if (id < 0 || id > 2006) {
return NULL;
}
return &data->macs[id][0];
}
/* wait for a specific pimfor, timeout in 10ms resolution */
/* pim_sock must be non-block to prevent dead lock from no response */
/* or same response type in series */
static int prism54_waitpim(void *priv, unsigned long oid, void *buf, int len,
int timeout)
{
struct prism54_driver_data *drv = priv;
struct timeval tv, stv, ctv;
fd_set pfd;
int rlen;
pimdev_hdr *pkt;
pkt = malloc(8192);
if (pkt == NULL)
return -1;
FD_ZERO(&pfd);
gettimeofday(&stv, NULL);
do {
FD_SET(drv->pim_sock, &pfd);
tv.tv_sec = 0;
tv.tv_usec = 10000;
if (select(drv->pim_sock + 1, &pfd, NULL, NULL, &tv)) {
rlen = recv(drv->pim_sock, pkt, 8192, 0);
if (rlen > 0) {
if (pkt->oid == htonl(oid)) {
if (rlen <= len) {
if (buf != NULL) {
memcpy(buf, pkt, rlen);
}
free(pkt);
return rlen;
} else {
printf("buffer too small\n");
free(pkt);
return -1;
}
} else {
gettimeofday(&ctv, NULL);
continue;
}
}
}
gettimeofday(&ctv, NULL);
} while (((ctv.tv_sec - stv.tv_sec) * 100 +
(ctv.tv_usec - stv.tv_usec) / 10000) > timeout);
free(pkt);
return 0;
}
/* send an eapol packet */
static int prism54_send_eapol(void *priv, const u8 *addr,
const u8 *data, size_t data_len, int encrypt,
const u8 *own_addr)
{
struct prism54_driver_data *drv = priv;
ieee802_3_hdr *hdr;
size_t len;
u8 *pos;
int res;
len = sizeof(*hdr) + data_len;
hdr = os_zalloc(len);
if (hdr == NULL) {
printf("malloc() failed for prism54_send_data(len=%lu)\n",
(unsigned long) len);
return -1;
}
memcpy(&hdr->da[0], addr, ETH_ALEN);
memcpy(&hdr->sa[0], own_addr, ETH_ALEN);
hdr->type = htons(ETH_P_PAE);
pos = (u8 *) (hdr + 1);
memcpy(pos, data, data_len);
res = send(drv->sock, 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;
}
/* open data channel(auth-1) or eapol only(unauth-0) */
static int prism54_set_sta_authorized(void *priv, const u8 *addr,
int authorized)
{
struct prism54_driver_data *drv = priv;
pimdev_hdr *hdr;
char *pos;
hdr = malloc(sizeof(*hdr) + ETH_ALEN);
if (hdr == NULL)
return -1;
hdr->op = htonl(PIMOP_SET);
if (authorized) {
hdr->oid = htonl(DOT11_OID_EAPAUTHSTA);
} else {
hdr->oid = htonl(DOT11_OID_EAPUNAUTHSTA);
}
pos = (char *) (hdr + 1);
memcpy(pos, addr, ETH_ALEN);
send(drv->pim_sock, hdr, sizeof(*hdr) + ETH_ALEN, 0);
prism54_waitpim(priv, hdr->oid, hdr, sizeof(*hdr) + ETH_ALEN, 10);
free(hdr);
return 0;
}
static int
prism54_sta_set_flags(void *priv, const u8 *addr, int total_flags,
int flags_or, int flags_and)
{
/* For now, only support setting Authorized flag */
if (flags_or & WLAN_STA_AUTHORIZED)
return prism54_set_sta_authorized(priv, addr, 1);
if (flags_and & WLAN_STA_AUTHORIZED)
return prism54_set_sta_authorized(priv, addr, 0);
return 0;
}
static int prism54_set_key(const char *ifname, void *priv, wpa_alg alg,
const u8 *addr, int key_idx, int set_tx,
const u8 *seq, size_t seq_len,
const u8 *key, size_t key_len)
{
struct prism54_driver_data *drv = priv;
pimdev_hdr *hdr;
struct obj_stakey *keys;
u8 *buf;
size_t blen;
int ret = 0;
blen = sizeof(struct obj_stakey) + sizeof(pimdev_hdr);
hdr = malloc(blen);
if (hdr == NULL) {
printf("memory low\n");
return -1;
}
keys = (struct obj_stakey *) &hdr[1];
if (!addr) {
memset(&keys->address[0], 0xff, ETH_ALEN);
} else {
memcpy(&keys->address[0], addr, ETH_ALEN);
}
switch (alg) {
case WPA_ALG_WEP:
keys->type = DOT11_PRIV_WEP;
break;
case WPA_ALG_TKIP:
keys->type = DOT11_PRIV_TKIP;
break;
case WPA_ALG_NONE:
/* the only way to clear the key is to deauth it */
/* and prism54 is capable to receive unencrypted packet */
/* so we do nothing here */
free(hdr);
return 0;
default:
printf("bad auth type: %d\n", alg);
free(hdr);
return -1;
}
buf = (u8 *) &keys->key[0];
keys->length = key_len;
keys->keyid = key_idx;
keys->options = htons(DOT11_STAKEY_OPTION_DEFAULTKEY);
keys->reserved = 0;
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_STAKEY);
memcpy(buf, key, key_len);
ret = send(drv->pim_sock, hdr, blen, 0);
if (ret < 0) {
free(hdr);
return ret;
}
prism54_waitpim(priv, hdr->oid, hdr, blen, 10);
free(hdr);
return 0;
}
/* get TKIP station sequence counter, prism54 is only 6 bytes */
static int prism54_get_seqnum(const char *ifname, void *priv, const u8 *addr,
int idx, u8 *seq)
{
struct prism54_driver_data *drv = priv;
struct obj_stasc *stasc;
pimdev_hdr *hdr;
size_t blen;
int ret = 0;
blen = sizeof(*stasc) + sizeof(*hdr);
hdr = malloc(blen);
if (hdr == NULL)
return -1;
stasc = (struct obj_stasc *) &hdr[1];
if (addr == NULL)
memset(&stasc->address[0], 0xff, ETH_ALEN);
else
memcpy(&stasc->address[0], addr, ETH_ALEN);
hdr->oid = htonl(DOT11_OID_STASC);
hdr->op = htonl(PIMOP_GET);
stasc->keyid = idx;
if (send(drv->pim_sock,hdr,blen,0) <= 0) {
free(hdr);
return -1;
}
if (prism54_waitpim(priv, DOT11_OID_STASC, hdr, blen, 10) <= 0) {
ret = -1;
} else {
if (hdr->op == (int) htonl(PIMOP_RESPONSE)) {
memcpy(seq + 2, &stasc->sc_high, ETH_ALEN);
memset(seq, 0, 2);
} else {
ret = -1;
}
}
free(hdr);
return ret;
}
/* include unencrypted, set mlme autolevel to extended */
static int prism54_init_1x(void *priv)
{
struct prism54_driver_data *drv = priv;
pimdev_hdr *hdr;
unsigned long *ul;
int blen = sizeof(*hdr) + sizeof(*ul);
hdr = malloc(blen);
if (hdr == NULL)
return -1;
ul = (unsigned long *) &hdr[1];
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_EXUNENCRYPTED);
*ul = htonl(DOT11_BOOL_TRUE); /* not accept */
send(drv->pim_sock, hdr, blen, 0);
prism54_waitpim(priv, DOT11_OID_EXUNENCRYPTED, hdr, blen, 10);
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_MLMEAUTOLEVEL);
*ul = htonl(DOT11_MLME_EXTENDED);
send(drv->pim_sock, hdr, blen, 0);
prism54_waitpim(priv, DOT11_OID_MLMEAUTOLEVEL, hdr, blen, 10);
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_DOT1XENABLE);
*ul = htonl(DOT11_BOOL_TRUE);
send(drv->pim_sock, hdr, blen, 0);
prism54_waitpim(priv, DOT11_OID_DOT1XENABLE, hdr, blen, 10);
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_AUTHENABLE);
*ul = htonl(DOT11_AUTH_OS); /* OS */
send(drv->pim_sock, hdr, blen, 0);
prism54_waitpim(priv, DOT11_OID_AUTHENABLE, hdr, blen, 10);
free(hdr);
return 0;
}
static int prism54_set_privacy_invoked(const char *ifname, void *priv,
int flag)
{
struct prism54_driver_data *drv = priv;
pimdev_hdr *hdr;
unsigned long *ul;
int ret;
int blen = sizeof(*hdr) + sizeof(*ul);
hdr = malloc(blen);
if (hdr == NULL)
return -1;
ul = (unsigned long *) &hdr[1];
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_PRIVACYINVOKED);
if (flag) {
*ul = htonl(DOT11_BOOL_TRUE); /* has privacy */
} else {
*ul = 0;
}
ret = send(drv->pim_sock, hdr, blen, 0);
if (ret >= 0) {
ret = prism54_waitpim(priv, DOT11_OID_PRIVACYINVOKED, hdr,
blen, 10);
}
free(hdr);
return ret;
}
static int prism54_ioctl_setiwessid(const char *ifname, void *priv,
const u8 *buf, int len)
{
#if 0
struct prism54_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->pim_sock, SIOCSIWESSID, &iwr) < 0) {
perror("ioctl[SIOCSIWESSID]");
printf("len=%d\n", len);
return -1;
}
#endif
return 0;
}
/* kick all stations */
/* does not work during init, but at least it won't crash firmware */
static int prism54_flush(void *priv)
{
struct prism54_driver_data *drv = priv;
struct obj_mlmeex *mlme;
pimdev_hdr *hdr;
int ret;
unsigned int i;
long *nsta;
int blen = sizeof(*hdr) + sizeof(*mlme);
char *mac_id;
hdr = os_zalloc(blen);
if (hdr == NULL)
return -1;
mlme = (struct obj_mlmeex *) &hdr[1];
nsta = (long *) &hdr[1];
hdr->op = htonl(PIMOP_GET);
hdr->oid = htonl(DOT11_OID_CLIENTS);
ret = send(drv->pim_sock, hdr, sizeof(*hdr) + sizeof(long), 0);
ret = prism54_waitpim(priv, DOT11_OID_CLIENTS, hdr, blen, 10);
if ((ret < 0) || (hdr->op != (int) htonl(PIMOP_RESPONSE)) ||
(le_to_host32(*nsta) > 2007)) {
free(hdr);
return 0;
}
for (i = 0; i < le_to_host32(*nsta); i++) {
mlme->id = -1;
mac_id = mac_id_get(drv, i);
if (mac_id)
memcpy(&mlme->address[0], mac_id, ETH_ALEN);
mlme->code = host_to_le16(WLAN_REASON_UNSPECIFIED);
mlme->state = htons(DOT11_STATE_NONE);
mlme->size = 0;
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_DISASSOCIATEEX);
ret = send(drv->pim_sock, hdr, blen, 0);
prism54_waitpim(priv, DOT11_OID_DISASSOCIATEEX, hdr, blen,
100);
}
for (i = 0; i < le_to_host32(*nsta); i++) {
mlme->id = -1;
mac_id = mac_id_get(drv, i);
if (mac_id)
memcpy(&mlme->address[0], mac_id, ETH_ALEN);
mlme->code = host_to_le16(WLAN_REASON_UNSPECIFIED);
mlme->state = htons(DOT11_STATE_NONE);
mlme->size = 0;
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_DEAUTHENTICATEEX);
ret = send(drv->pim_sock, hdr, blen, 0);
prism54_waitpim(priv, DOT11_OID_DEAUTHENTICATEEX, hdr, blen,
100);
}
free(hdr);
return 0;
}
static int prism54_sta_deauth(void *priv, const u8 *addr, int reason)
{
struct prism54_driver_data *drv = priv;
pimdev_hdr *hdr;
struct obj_mlmeex *mlme;
int ret;
int blen = sizeof(*hdr) + sizeof(*mlme);
hdr = malloc(blen);
if (hdr == NULL)
return -1;
mlme = (struct obj_mlmeex *) &hdr[1];
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_DEAUTHENTICATEEX);
memcpy(&mlme->address[0], addr, ETH_ALEN);
mlme->id = -1;
mlme->state = htons(DOT11_STATE_NONE);
mlme->code = host_to_le16(reason);
mlme->size = 0;
ret = send(drv->pim_sock, hdr, blen, 0);
prism54_waitpim(priv, DOT11_OID_DEAUTHENTICATEEX, hdr, blen, 10);
free(hdr);
return ret;
}
static int prism54_sta_disassoc(void *priv, const u8 *addr, int reason)
{
struct prism54_driver_data *drv = priv;
pimdev_hdr *hdr;
struct obj_mlmeex *mlme;
int ret;
int blen = sizeof(*hdr) + sizeof(*mlme);
hdr = malloc(blen);
if (hdr == NULL)
return -1;
mlme = (struct obj_mlmeex *) &hdr[1];
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_DISASSOCIATEEX);
memcpy(&mlme->address[0], addr, ETH_ALEN);
mlme->id = -1;
mlme->state = htons(DOT11_STATE_NONE);
mlme->code = host_to_le16(reason);
mlme->size = 0;
ret = send(drv->pim_sock, hdr, blen, 0);
prism54_waitpim(priv, DOT11_OID_DISASSOCIATEEX, hdr, blen, 10);
free(hdr);
return ret;
}
static int prism54_get_inact_sec(void *priv, const u8 *addr)
{
struct prism54_driver_data *drv = priv;
pimdev_hdr *hdr;
struct obj_sta *sta;
int blen = sizeof(*hdr) + sizeof(*sta);
int ret;
hdr = malloc(blen);
if (hdr == NULL)
return -1;
hdr->op = htonl(PIMOP_GET);
hdr->oid = htonl(DOT11_OID_CLIENTFIND);
sta = (struct obj_sta *) &hdr[1];
memcpy(&sta->address[0], addr, ETH_ALEN);
ret = send(drv->pim_sock, hdr, blen, 0);
ret = prism54_waitpim(priv, DOT11_OID_CLIENTFIND, hdr, blen, 10);
if (ret != blen) {
printf("get_inact_sec: bad return %d\n", ret);
free(hdr);
return -1;
}
if (hdr->op != (int) htonl(PIMOP_RESPONSE)) {
printf("get_inact_sec: bad resp\n");
free(hdr);
return -1;
}
free(hdr);
return le_to_host16(sta->age);
}
/* set attachments */
static int prism54_set_generic_elem(const char *ifname, void *priv,
const u8 *elem, size_t elem_len)
{
struct prism54_driver_data *drv = priv;
pimdev_hdr *hdr;
char *pos;
struct obj_attachment_hdr *attach;
size_t blen = sizeof(*hdr) + sizeof(*attach) + elem_len;
hdr = os_zalloc(blen);
if (hdr == NULL) {
printf("%s: memory low\n", __func__);
return -1;
}
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_ATTACHMENT);
attach = (struct obj_attachment_hdr *)&hdr[1];
attach->type = DOT11_PKT_BEACON;
attach->id = -1;
attach->size = host_to_le16((short)elem_len);
pos = ((char*) attach) + sizeof(*attach);
if (elem)
memcpy(pos, elem, elem_len);
send(drv->pim_sock, hdr, blen, 0);
attach->type = DOT11_PKT_PROBE_RESP;
send(drv->pim_sock, hdr, blen, 0);
free(hdr);
return 0;
}
/* tell the card to auth the sta */
static void prism54_handle_probe(struct prism54_driver_data *drv,
void *buf, size_t len)
{
struct obj_mlmeex *mlme;
pimdev_hdr *hdr;
struct sta_info *sta;
hdr = (pimdev_hdr *)buf;
mlme = (struct obj_mlmeex *) &hdr[1];
sta = ap_get_sta(drv->hapd, (u8 *) &mlme->address[0]);
if (sta != NULL) {
if (sta->flags & (WLAN_STA_AUTH | WLAN_STA_ASSOC))
return;
}
if (len < sizeof(*mlme)) {
printf("bad probe packet\n");
return;
}
mlme->state = htons(DOT11_STATE_AUTHING);
mlme->code = 0;
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_AUTHENTICATEEX);
mlme->size = 0;
send(drv->pim_sock, hdr, sizeof(*hdr)+sizeof(*mlme), 0);
}
static void prism54_handle_deauth(struct prism54_driver_data *drv,
void *buf, size_t len)
{
struct obj_mlme *mlme;
pimdev_hdr *hdr;
struct sta_info *sta;
char *mac_id;
hdr = (pimdev_hdr *) buf;
mlme = (struct obj_mlme *) &hdr[1];
sta = ap_get_sta(drv->hapd, (u8 *) &mlme->address[0]);
mac_id = mac_id_get(drv, mlme->id);
if (sta == NULL || mac_id == NULL)
return;
memcpy(&mlme->address[0], mac_id, ETH_ALEN);
sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
ap_free_sta(drv->hapd, sta);
}
static void prism54_handle_disassoc(struct prism54_driver_data *drv,
void *buf, size_t len)
{
struct obj_mlme *mlme;
pimdev_hdr *hdr;
struct sta_info *sta;
char *mac_id;
hdr = (pimdev_hdr *) buf;
mlme = (struct obj_mlme *) &hdr[1];
mac_id = mac_id_get(drv, mlme->id);
if (mac_id == NULL)
return;
memcpy(&mlme->address[0], mac_id, ETH_ALEN);
sta = ap_get_sta(drv->hapd, (u8 *) &mlme->address[0]);
if (sta == NULL) {
return;
}
sta->flags &= ~WLAN_STA_ASSOC;
wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
accounting_sta_stop(drv->hapd, sta);
ieee802_1x_free_station(sta);
}
/* to auth it, just allow it now, later for os/sk */
static void prism54_handle_auth(struct prism54_driver_data *drv,
void *buf, size_t len)
{
struct obj_mlmeex *mlme;
pimdev_hdr *hdr;
struct sta_info *sta;
int resp;
hdr = (pimdev_hdr *) buf;
mlme = (struct obj_mlmeex *) &hdr[1];
if (len < sizeof(*mlme)) {
printf("bad auth packet\n");
return;
}
if (mlme->state == htons(DOT11_STATE_AUTHING)) {
sta = ap_sta_add(drv->hapd, (u8 *) &mlme->address[0]);
if (drv->hapd->tkip_countermeasures) {
resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
goto fail;
}
mac_id_refresh(drv, mlme->id, &mlme->address[0]);
if (!sta) {
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
sta->flags &= ~WLAN_STA_PREAUTH;
ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
sta->flags |= WLAN_STA_AUTH;
wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
mlme->code = 0;
mlme->state=htons(DOT11_STATE_AUTH);
hdr->op = htonl(PIMOP_SET);
hdr->oid = htonl(DOT11_OID_AUTHENTICATEEX);
mlme->size = 0;
sta->timeout_next = STA_NULLFUNC;
send(drv->pim_sock, hdr, sizeof(*hdr) + sizeof(*mlme), 0);
}
return;
fail:
printf("auth fail: %x\n", resp);
mlme->code = host_to_le16(resp);
mlme->size = 0;
if (sta)
sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
hdr->oid = htonl(DOT11_OID_DEAUTHENTICATEEX);
hdr->op = htonl(PIMOP_SET);
send(drv->pim_sock, hdr, sizeof(*hdr)+sizeof(*mlme), 0);
}
/* do the wpa thing */
static void prism54_handle_assoc(struct prism54_driver_data *drv,
void *buf, size_t len)
{
pimdev_hdr *hdr;
struct obj_mlmeex *mlme;
struct ieee802_11_elems elems;
struct sta_info *sta;
u8 *wpa_ie;
u8 *cb;
int ieofs = 0;
size_t wpa_ie_len;
int resp, new_assoc;
char *mac_id;
resp = 0;
hdr = (pimdev_hdr *) buf;
mlme = (struct obj_mlmeex *) &hdr[1];
switch (ntohl(hdr->oid)) {
case DOT11_OID_ASSOCIATE:
case DOT11_OID_REASSOCIATE:
mlme->size = 0;
default:
break;
}
if ((mlme->state == (int) htonl(DOT11_STATE_ASSOCING)) ||
(mlme->state == (int) htonl(DOT11_STATE_REASSOCING))) {
if (len < sizeof(pimdev_hdr) + sizeof(struct obj_mlme)) {
printf("bad assoc packet\n");
return;
}
mac_id = mac_id_get(drv, mlme->id);
if (mac_id == NULL)
return;
memcpy(&mlme->address[0], mac_id, ETH_ALEN);
sta = ap_get_sta(drv->hapd, (u8 *) &mlme->address[0]);
if (sta == NULL) {
printf("cannot get sta\n");
return;
}
cb = (u8 *) &mlme->data[0];
if (hdr->oid == htonl(DOT11_OID_ASSOCIATEEX)) {
ieofs = 4;
} else if (hdr->oid == htonl(DOT11_OID_REASSOCIATEEX)) {
ieofs = 10;
}
if (le_to_host16(mlme->size) <= ieofs) {
printf("attach too small\n");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if (ieee802_11_parse_elems(cb + ieofs,
le_to_host16(mlme->size) - ieofs,
&elems, 1) == ParseFailed) {
printf("STA " MACSTR " sent invalid association "
"request\n", MAC2STR(sta->addr));
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
if ((drv->hapd->conf->wpa & WPA_PROTO_RSN) &&
elems.rsn_ie) {
wpa_ie = elems.rsn_ie;
wpa_ie_len = elems.rsn_ie_len;
} else if ((drv->hapd->conf->wpa & WPA_PROTO_WPA) &&
elems.wpa_ie) {
wpa_ie = elems.wpa_ie;
wpa_ie_len = elems.wpa_ie_len;
} else {
wpa_ie = NULL;
wpa_ie_len = 0;
}
if (drv->hapd->conf->wpa && wpa_ie == NULL) {
printf("STA " MACSTR ": No WPA/RSN IE in association "
"request\n", MAC2STR(sta->addr));
resp = WLAN_STATUS_INVALID_IE;
goto fail;
}
if (drv->hapd->conf->wpa) {
int res;
wpa_ie -= 2;
wpa_ie_len += 2;
if (sta->wpa_sm == NULL)
sta->wpa_sm = wpa_auth_sta_init(
drv->hapd->wpa_auth, sta->addr);
if (sta->wpa_sm == NULL) {
printf("Failed to initialize WPA state "
"machine\n");
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto fail;
}
res = wpa_validate_wpa_ie(drv->hapd->wpa_auth,
sta->wpa_sm,
wpa_ie, wpa_ie_len,
NULL, 0);
if (res == WPA_INVALID_GROUP)
resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
else if (res == WPA_INVALID_PAIRWISE)
resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
else if (res == WPA_INVALID_AKMP)
resp = WLAN_STATUS_AKMP_NOT_VALID;
else if (res == WPA_ALLOC_FAIL)
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
else if (res != WPA_IE_OK)
resp = WLAN_STATUS_INVALID_IE;
if (resp != WLAN_STATUS_SUCCESS)
goto fail;
}
hdr->oid = (hdr->oid == htonl(DOT11_OID_ASSOCIATEEX)) ?
htonl(DOT11_OID_ASSOCIATEEX) :
htonl(DOT11_OID_REASSOCIATEEX);
hdr->op = htonl(PIMOP_SET);
mlme->code = 0;
mlme->state = htons(DOT11_STATE_ASSOC);
mlme->size = 0;
send(drv->pim_sock, hdr, sizeof(*hdr) + sizeof(*mlme), 0);
return;
} else if (mlme->state==htons(DOT11_STATE_ASSOC)) {
if (len < sizeof(pimdev_hdr) + sizeof(struct obj_mlme)) {
printf("bad assoc packet\n");
return;
}
mac_id = mac_id_get(drv, mlme->id);
if (mac_id == NULL)
return;
memcpy(&mlme->address[0], mac_id, ETH_ALEN);
sta = ap_get_sta(drv->hapd, (u8 *) &mlme->address[0]);
if (sta == NULL) {
printf("cannot get sta\n");
return;
}
new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
hostapd_new_assoc_sta(drv->hapd, sta, !new_assoc);
ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
sta->timeout_next = STA_NULLFUNC;
return;
}
return;
fail:
printf("Prism54: assoc fail: %x\n", resp);
mlme->code = host_to_le16(resp);
mlme->size = 0;
mlme->state = htons(DOT11_STATE_ASSOCING);
hdr->oid = htonl(DOT11_OID_DISASSOCIATEEX);
hdr->op = htonl(PIMOP_SET);
sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
send(drv->pim_sock, hdr, sizeof(*hdr) + sizeof(*mlme), 0);
}
static void handle_pim(int sock, void *eloop_ctx, void *sock_ctx)
{
struct prism54_driver_data *drv = eloop_ctx;
int len;
pimdev_hdr *hdr;
hdr = malloc(PIM_BUF_SIZE);
if (hdr == NULL)
return;
len = recv(sock, hdr, PIM_BUF_SIZE, 0);
if (len < 0) {
perror("recv");
free(hdr);
return;
}
if (len < 8) {
printf("handle_pim: too short (%d)\n", len);
free(hdr);
return;
}
if (hdr->op != (int) htonl(PIMOP_TRAP)) {
free(hdr);
return;
}
switch (ntohl(hdr->oid)) {
case DOT11_OID_PROBE:
prism54_handle_probe(drv, hdr, len);
break;
case DOT11_OID_DEAUTHENTICATEEX:
case DOT11_OID_DEAUTHENTICATE:
prism54_handle_deauth(drv, hdr, len);
break;
case DOT11_OID_DISASSOCIATEEX:
case DOT11_OID_DISASSOCIATE:
prism54_handle_disassoc(drv, hdr, len);
break;
case DOT11_OID_AUTHENTICATEEX:
case DOT11_OID_AUTHENTICATE:
prism54_handle_auth(drv, hdr, len);
break;
case DOT11_OID_ASSOCIATEEX:
case DOT11_OID_REASSOCIATEEX:
case DOT11_OID_ASSOCIATE:
case DOT11_OID_REASSOCIATE:
prism54_handle_assoc(drv, hdr, len);
default:
break;
}
free(hdr);
}
static void handle_802_3(int sock, void *eloop_ctx, void *sock_ctx)
{
struct hostapd_data *hapd = (struct hostapd_data *) eloop_ctx;
int len;
ieee802_3_hdr *hdr;
hdr = malloc(PIM_BUF_SIZE);
if (hdr == NULL)
return;
len = recv(sock, hdr, PIM_BUF_SIZE, 0);
if (len < 0) {
perror("recv");
free(hdr);
return;
}
if (len < 14) {
wpa_printf(MSG_MSGDUMP, "handle_802_3: too short (%d)", len);
free(hdr);
return;
}
if (hdr->type == htons(ETH_P_PAE)) {
hostapd_eapol_receive(hapd, (u8 *) &hdr->sa[0], (u8 *) &hdr[1],
len - sizeof(*hdr));
}
free(hdr);
}
static int prism54_init_sockets(struct prism54_driver_data *drv)
{
struct hostapd_data *hapd = drv->hapd;
struct ifreq ifr;
struct sockaddr_ll addr;
drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
if (drv->sock < 0) {
perror("socket[PF_PACKET,SOCK_RAW]");
return -1;
}
if (eloop_register_read_sock(drv->sock, handle_802_3, drv->hapd, NULL))
{
printf("Could not register read socket\n");
return -1;
}
memset(&ifr, 0, sizeof(ifr));
if (hapd->conf->bridge[0] != '\0') {
printf("opening bridge: %s\n", hapd->conf->bridge);
os_strlcpy(ifr.ifr_name, hapd->conf->bridge,
sizeof(ifr.ifr_name));
} else {
os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
}
if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
perror("ioctl(SIOCGIFINDEX)");
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.sll_family = AF_PACKET;
addr.sll_ifindex = ifr.ifr_ifindex;
addr.sll_protocol = htons(ETH_P_PAE);
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);
drv->pim_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (drv->pim_sock < 0) {
perror("socket[PF_PACKET,SOCK_RAW]");
return -1;
}
if (eloop_register_read_sock(drv->pim_sock, handle_pim, 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->pim_sock, SIOCGIFINDEX, &ifr) != 0) {
perror("ioctl(SIOCGIFINDEX)");
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.sll_family = AF_PACKET;
addr.sll_ifindex = ifr.ifr_ifindex;
addr.sll_protocol = htons(ETH_P_ALL);
wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
addr.sll_ifindex);
if (bind(drv->pim_sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("bind");
return -1;
}
return 0;
}
static void * prism54_driver_init(struct hostapd_data *hapd)
{
struct prism54_driver_data *drv;
drv = os_zalloc(sizeof(struct prism54_driver_data));
if (drv == NULL) {
printf("Could not allocate memory for hostapd Prism54 driver "
"data\n");
return NULL;
}
drv->hapd = hapd;
drv->pim_sock = drv->sock = -1;
memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
if (prism54_init_sockets(drv)) {
free(drv);
return NULL;
}
prism54_init_1x(drv);
/* must clean previous elems */
prism54_set_generic_elem(drv->iface, drv, NULL, 0);
return drv;
}
static void prism54_driver_deinit(void *priv)
{
struct prism54_driver_data *drv = priv;
if (drv->pim_sock >= 0)
close(drv->pim_sock);
if (drv->sock >= 0)
close(drv->sock);
free(drv);
}
const struct wpa_driver_ops wpa_driver_prism54_ops = {
.name = "prism54",
.init = prism54_driver_init,
.deinit = prism54_driver_deinit,
/* .set_ieee8021x = prism54_init_1x, */
.set_privacy = prism54_set_privacy_invoked,
.set_key = prism54_set_key,
.get_seqnum = prism54_get_seqnum,
.flush = prism54_flush,
.set_generic_elem = prism54_set_generic_elem,
.send_eapol = prism54_send_eapol,
.sta_set_flags = prism54_sta_set_flags,
.sta_deauth = prism54_sta_deauth,
.sta_disassoc = prism54_sta_disassoc,
.set_ssid = prism54_ioctl_setiwessid,
.get_inact_sec = prism54_get_inact_sec,
};
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