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hostap/src/drivers/driver_nl80211.c
Jouni Malinen 625f587b03 nl80211: Remove user space MLME code 
This design did not make it into the kernel and the new user space SME
design has removed the need for keeping the experimental code.
2009-03-20 22:31:24 +02:00

2535 lines
65 KiB
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/*
* WPA Supplicant - driver interaction with Linux nl80211/cfg80211
* Copyright (c) 2003-2008, 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 <net/if_arp.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include "nl80211_copy.h"
#include "wireless_copy.h"
#include "common.h"
#include "driver.h"
#include "eloop.h"
#include "ieee802_11_defs.h"
#ifndef IFF_LOWER_UP
#define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
#endif
#ifndef IFF_DORMANT
#define IFF_DORMANT 0x20000 /* driver signals dormant */
#endif
#ifndef IF_OPER_DORMANT
#define IF_OPER_DORMANT 5
#endif
#ifndef IF_OPER_UP
#define IF_OPER_UP 6
#endif
#ifndef NO_WEXT_COMPAT
/*
* Fall back to WEXT association, if the kernel does not support nl80211 MLME
* commands. This is temporary backwards compatibility version that will be
* removed at some point.
*/
#define WEXT_COMPAT
#endif /* NO_WEXT_COMPAT */
struct wpa_driver_nl80211_data {
void *ctx;
int wext_event_sock;
int ioctl_sock;
char ifname[IFNAMSIZ + 1];
int ifindex;
int if_removed;
struct wpa_driver_capa capa;
int has_capability;
int we_version_compiled;
#ifdef WEXT_COMPAT
u8 *assoc_req_ies;
size_t assoc_req_ies_len;
u8 *assoc_resp_ies;
size_t assoc_resp_ies_len;
/* for set_auth_alg fallback */
int use_crypt;
int auth_alg_fallback;
#endif /* WEXT_COMPAT */
int operstate;
char mlmedev[IFNAMSIZ + 1];
int scan_complete_events;
struct nl_handle *nl_handle;
struct nl_cache *nl_cache;
struct nl_cb *nl_cb;
struct genl_family *nl80211;
u8 bssid[ETH_ALEN];
int associated;
};
static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
void *timeout_ctx);
static int wpa_driver_nl80211_set_mode(void *priv, int mode);
static int wpa_driver_nl80211_flush_pmkid(void *priv);
static int wpa_driver_nl80211_get_range(void *priv);
static int
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
/* nl80211 code */
static int ack_handler(struct nl_msg *msg, void *arg)
{
int *err = arg;
*err = 0;
return NL_STOP;
}
static int finish_handler(struct nl_msg *msg, void *arg)
{
int *ret = arg;
*ret = 0;
return NL_SKIP;
}
static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
void *arg)
{
int *ret = arg;
*ret = err->error;
return NL_SKIP;
}
static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
struct nl_msg *msg,
int (*valid_handler)(struct nl_msg *, void *),
void *valid_data)
{
struct nl_cb *cb;
int err = -ENOMEM;
cb = nl_cb_clone(drv->nl_cb);
if (!cb)
goto out;
err = nl_send_auto_complete(drv->nl_handle, msg);
if (err < 0)
goto out;
err = 1;
nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
if (valid_handler)
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
valid_handler, valid_data);
while (err > 0)
nl_recvmsgs(drv->nl_handle, cb);
out:
nl_cb_put(cb);
nlmsg_free(msg);
return err;
}
struct family_data {
const char *group;
int id;
};
static int family_handler(struct nl_msg *msg, void *arg)
{
struct family_data *res = arg;
struct nlattr *tb[CTRL_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *mcgrp;
int i;
nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[CTRL_ATTR_MCAST_GROUPS])
return NL_SKIP;
nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
nla_len(mcgrp), NULL);
if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
!tb2[CTRL_ATTR_MCAST_GRP_ID] ||
os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
res->group,
nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
continue;
res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
break;
};
return NL_SKIP;
}
static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
const char *family, const char *group)
{
struct nl_msg *msg;
int ret = -1;
struct family_data res = { group, -ENOENT };
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
0, 0, CTRL_CMD_GETFAMILY, 0);
NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
ret = send_and_recv_msgs(drv, msg, family_handler, &res);
msg = NULL;
if (ret == 0)
ret = res.id;
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_send_oper_ifla(
struct wpa_driver_nl80211_data *drv,
int linkmode, int operstate)
{
struct {
struct nlmsghdr hdr;
struct ifinfomsg ifinfo;
char opts[16];
} req;
struct rtattr *rta;
static int nl_seq;
ssize_t ret;
os_memset(&req, 0, sizeof(req));
req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
req.hdr.nlmsg_type = RTM_SETLINK;
req.hdr.nlmsg_flags = NLM_F_REQUEST;
req.hdr.nlmsg_seq = ++nl_seq;
req.hdr.nlmsg_pid = 0;
req.ifinfo.ifi_family = AF_UNSPEC;
req.ifinfo.ifi_type = 0;
req.ifinfo.ifi_index = drv->ifindex;
req.ifinfo.ifi_flags = 0;
req.ifinfo.ifi_change = 0;
if (linkmode != -1) {
rta = (struct rtattr *)
((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
rta->rta_type = IFLA_LINKMODE;
rta->rta_len = RTA_LENGTH(sizeof(char));
*((char *) RTA_DATA(rta)) = linkmode;
req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
RTA_LENGTH(sizeof(char));
}
if (operstate != -1) {
rta = (struct rtattr *)
((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
rta->rta_type = IFLA_OPERSTATE;
rta->rta_len = RTA_LENGTH(sizeof(char));
*((char *) RTA_DATA(rta)) = operstate;
req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
RTA_LENGTH(sizeof(char));
}
wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
linkmode, operstate);
ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
"%s (assume operstate is not supported)",
strerror(errno));
}
return ret < 0 ? -1 : 0;
}
static int wpa_driver_nl80211_set_auth_param(
struct wpa_driver_nl80211_data *drv, int idx, u32 value)
{
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.param.flags = idx & IW_AUTH_INDEX;
iwr.u.param.value = value;
if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
if (errno != EOPNOTSUPP) {
wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
"value 0x%x) failed: %s)",
idx, value, strerror(errno));
}
ret = errno == EOPNOTSUPP ? -2 : -1;
}
return ret;
}
static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
{
struct wpa_driver_nl80211_data *drv = priv;
#ifdef WEXT_COMPAT
if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
perror("ioctl[SIOCGIWAP]");
ret = -1;
}
os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
return ret;
}
#endif /* WEXT_COMPAT */
if (!drv->associated)
return -1;
os_memcpy(bssid, drv->bssid, ETH_ALEN);
return 0;
}
static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
{
struct wpa_driver_nl80211_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
if (bssid)
os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
else
os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
perror("ioctl[SIOCSIWAP]");
ret = -1;
}
return ret;
}
static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
{
struct wpa_driver_nl80211_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.essid.pointer = (caddr_t) ssid;
iwr.u.essid.length = 32;
if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
perror("ioctl[SIOCGIWESSID]");
ret = -1;
} else {
ret = iwr.u.essid.length;
if (ret > 32)
ret = 32;
/* Some drivers include nul termination in the SSID, so let's
* remove it here before further processing. WE-21 changes this
* to explicitly require the length _not_ to include nul
* termination. */
if (ret > 0 && ssid[ret - 1] == '\0' &&
drv->we_version_compiled < 21)
ret--;
}
return ret;
}
static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
size_t ssid_len)
{
struct wpa_driver_nl80211_data *drv = priv;
struct iwreq iwr;
int ret = 0;
char buf[33];
if (ssid_len > 32)
return -1;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
/* flags: 1 = ESSID is active, 0 = not (promiscuous) */
iwr.u.essid.flags = (ssid_len != 0);
os_memset(buf, 0, sizeof(buf));
os_memcpy(buf, ssid, ssid_len);
iwr.u.essid.pointer = (caddr_t) buf;
if (drv->we_version_compiled < 21) {
/* For historic reasons, set SSID length to include one extra
* character, C string nul termination, even though SSID is
* really an octet string that should not be presented as a C
* string. Some Linux drivers decrement the length by one and
* can thus end up missing the last octet of the SSID if the
* length is not incremented here. WE-21 changes this to
* explicitly require the length _not_ to include nul
* termination. */
if (ssid_len)
ssid_len++;
}
iwr.u.essid.length = ssid_len;
if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
perror("ioctl[SIOCSIWESSID]");
ret = -1;
}
return ret;
}
static int wpa_driver_nl80211_set_freq(void *priv, int freq)
{
struct wpa_driver_nl80211_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.freq.m = freq * 100000;
iwr.u.freq.e = 1;
if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
perror("ioctl[SIOCSIWFREQ]");
ret = -1;
}
return ret;
}
#ifdef WEXT_COMPAT
static void
wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
{
union wpa_event_data data;
wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
custom);
os_memset(&data, 0, sizeof(data));
/* Host AP driver */
if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
data.michael_mic_failure.unicast =
os_strstr(custom, " unicast ") != NULL;
/* TODO: parse parameters(?) */
wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
} else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
char *spos;
int bytes;
spos = custom + 17;
bytes = strspn(spos, "0123456789abcdefABCDEF");
if (!bytes || (bytes & 1))
return;
bytes /= 2;
data.assoc_info.req_ies = os_malloc(bytes);
if (data.assoc_info.req_ies == NULL)
return;
data.assoc_info.req_ies_len = bytes;
hexstr2bin(spos, data.assoc_info.req_ies, bytes);
spos += bytes * 2;
data.assoc_info.resp_ies = NULL;
data.assoc_info.resp_ies_len = 0;
if (os_strncmp(spos, " RespIEs=", 9) == 0) {
spos += 9;
bytes = strspn(spos, "0123456789abcdefABCDEF");
if (!bytes || (bytes & 1))
goto done;
bytes /= 2;
data.assoc_info.resp_ies = os_malloc(bytes);
if (data.assoc_info.resp_ies == NULL)
goto done;
data.assoc_info.resp_ies_len = bytes;
hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
}
wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
done:
os_free(data.assoc_info.resp_ies);
os_free(data.assoc_info.req_ies);
#ifdef CONFIG_PEERKEY
} else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
"STKSTART.request '%s'", custom + 17);
return;
}
wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
#endif /* CONFIG_PEERKEY */
}
}
#endif /* WEXT_COMPAT */
static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
void *ctx, const char *ev, size_t len)
{
const struct iw_michaelmicfailure *mic;
union wpa_event_data data;
if (len < sizeof(*mic))
return -1;
mic = (const struct iw_michaelmicfailure *) ev;
wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
"flags=0x%x src_addr=" MACSTR, mic->flags,
MAC2STR(mic->src_addr.sa_data));
os_memset(&data, 0, sizeof(data));
data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
return 0;
}
static int wpa_driver_nl80211_event_wireless_pmkidcand(
struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
{
const struct iw_pmkid_cand *cand;
union wpa_event_data data;
const u8 *addr;
if (len < sizeof(*cand))
return -1;
cand = (const struct iw_pmkid_cand *) ev;
addr = (const u8 *) cand->bssid.sa_data;
wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
"flags=0x%x index=%d bssid=" MACSTR, cand->flags,
cand->index, MAC2STR(addr));
os_memset(&data, 0, sizeof(data));
os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
data.pmkid_candidate.index = cand->index;
data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
return 0;
}
#ifdef WEXT_COMPAT
static int wpa_driver_nl80211_event_wireless_assocreqie(
struct wpa_driver_nl80211_data *drv, const char *ev, int len)
{
if (len < 0)
return -1;
wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
len);
os_free(drv->assoc_req_ies);
drv->assoc_req_ies = os_malloc(len);
if (drv->assoc_req_ies == NULL) {
drv->assoc_req_ies_len = 0;
return -1;
}
os_memcpy(drv->assoc_req_ies, ev, len);
drv->assoc_req_ies_len = len;
return 0;
}
static int wpa_driver_nl80211_event_wireless_assocrespie(
struct wpa_driver_nl80211_data *drv, const char *ev, int len)
{
if (len < 0)
return -1;
wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
len);
os_free(drv->assoc_resp_ies);
drv->assoc_resp_ies = os_malloc(len);
if (drv->assoc_resp_ies == NULL) {
drv->assoc_resp_ies_len = 0;
return -1;
}
os_memcpy(drv->assoc_resp_ies, ev, len);
drv->assoc_resp_ies_len = len;
return 0;
}
static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
{
union wpa_event_data data;
if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
return;
os_memset(&data, 0, sizeof(data));
if (drv->assoc_req_ies) {
data.assoc_info.req_ies = drv->assoc_req_ies;
drv->assoc_req_ies = NULL;
data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
}
if (drv->assoc_resp_ies) {
data.assoc_info.resp_ies = drv->assoc_resp_ies;
drv->assoc_resp_ies = NULL;
data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
}
wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
os_free(data.assoc_info.req_ies);
os_free(data.assoc_info.resp_ies);
}
#endif /* WEXT_COMPAT */
static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
void *ctx, char *data, int len)
{
struct iw_event iwe_buf, *iwe = &iwe_buf;
char *pos, *end, *custom;
#ifdef WEXT_COMPAT
char *buf;
#endif /* WEXT_COMPAT */
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. */
os_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_compiled > 18 &&
(iwe->cmd == IWEVMICHAELMICFAILURE ||
iwe->cmd == IWEVCUSTOM ||
iwe->cmd == IWEVASSOCREQIE ||
iwe->cmd == IWEVASSOCRESPIE ||
iwe->cmd == IWEVPMKIDCAND)) {
/* WE-19 removed the pointer from struct iw_point */
char *dpos = (char *) &iwe_buf.u.data.length;
int dlen = dpos - (char *) &iwe_buf;
os_memcpy(dpos, pos + IW_EV_LCP_LEN,
sizeof(struct iw_event) - dlen);
} else {
os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
custom += IW_EV_POINT_OFF;
}
switch (iwe->cmd) {
#ifdef WEXT_COMPAT
case SIOCGIWAP:
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
break;
wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
MACSTR,
MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
if (is_zero_ether_addr(
(const u8 *) iwe->u.ap_addr.sa_data) ||
os_memcmp(iwe->u.ap_addr.sa_data,
"\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
0) {
os_free(drv->assoc_req_ies);
drv->assoc_req_ies = NULL;
os_free(drv->assoc_resp_ies);
drv->assoc_resp_ies = NULL;
wpa_supplicant_event(ctx, EVENT_DISASSOC,
NULL);
} else {
wpa_driver_nl80211_event_assoc_ies(drv);
wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
}
break;
#endif /* WEXT_COMPAT */
case IWEVMICHAELMICFAILURE:
wpa_driver_nl80211_event_wireless_michaelmicfailure(
ctx, custom, iwe->u.data.length);
break;
#ifdef WEXT_COMPAT
case IWEVCUSTOM:
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
break;
if (custom + iwe->u.data.length > end)
return;
buf = os_malloc(iwe->u.data.length + 1);
if (buf == NULL)
return;
os_memcpy(buf, custom, iwe->u.data.length);
buf[iwe->u.data.length] = '\0';
wpa_driver_nl80211_event_wireless_custom(ctx, buf);
os_free(buf);
break;
case IWEVASSOCREQIE:
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
break;
wpa_driver_nl80211_event_wireless_assocreqie(
drv, custom, iwe->u.data.length);
break;
case IWEVASSOCRESPIE:
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
break;
wpa_driver_nl80211_event_wireless_assocrespie(
drv, custom, iwe->u.data.length);
break;
#endif /* WEXT_COMPAT */
case IWEVPMKIDCAND:
wpa_driver_nl80211_event_wireless_pmkidcand(
drv, custom, iwe->u.data.length);
break;
}
pos += iwe->len;
}
}
static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
void *ctx, char *buf, size_t len,
int del)
{
union wpa_event_data event;
os_memset(&event, 0, sizeof(event));
if (len > sizeof(event.interface_status.ifname))
len = sizeof(event.interface_status.ifname) - 1;
os_memcpy(event.interface_status.ifname, buf, len);
event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
EVENT_INTERFACE_ADDED;
wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
del ? "DEL" : "NEW",
event.interface_status.ifname,
del ? "removed" : "added");
if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
if (del)
drv->if_removed = 1;
else
drv->if_removed = 0;
}
wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
}
static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
struct nlmsghdr *h)
{
struct ifinfomsg *ifi;
int attrlen, _nlmsg_len, rta_len;
struct rtattr *attr;
ifi = NLMSG_DATA(h);
_nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
attrlen = h->nlmsg_len - _nlmsg_len;
if (attrlen < 0)
return 0;
attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_IFNAME) {
if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
== 0)
return 1;
else
break;
}
attr = RTA_NEXT(attr, attrlen);
}
return 0;
}
static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
int ifindex, struct nlmsghdr *h)
{
if (drv->ifindex == ifindex)
return 1;
if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
drv->ifindex = if_nametoindex(drv->ifname);
wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
"interface");
wpa_driver_nl80211_finish_drv_init(drv);
return 1;
}
return 0;
}
static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
void *ctx, struct nlmsghdr *h,
size_t len)
{
struct ifinfomsg *ifi;
int attrlen, _nlmsg_len, rta_len;
struct rtattr * attr;
if (len < sizeof(*ifi))
return;
ifi = NLMSG_DATA(h);
if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
ifi->ifi_index);
return;
}
wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
"(%s%s%s%s)",
drv->operstate, ifi->ifi_flags,
(ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
(ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
(ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
(ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
/*
* Some drivers send the association event before the operup event--in
* this case, lifting operstate in wpa_driver_nl80211_set_operstate()
* fails. This will hit us when wpa_supplicant does not need to do
* IEEE 802.1X authentication
*/
if (drv->operstate == 1 &&
(ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
!(ifi->ifi_flags & IFF_RUNNING))
wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
_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) {
wpa_driver_nl80211_event_wireless(
drv, ctx, ((char *) attr) + rta_len,
attr->rta_len - rta_len);
} else if (attr->rta_type == IFLA_IFNAME) {
wpa_driver_nl80211_event_link(
drv, ctx,
((char *) attr) + rta_len,
attr->rta_len - rta_len, 0);
}
attr = RTA_NEXT(attr, attrlen);
}
}
static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
void *ctx, struct nlmsghdr *h,
size_t len)
{
struct ifinfomsg *ifi;
int attrlen, _nlmsg_len, rta_len;
struct rtattr * attr;
if (len < sizeof(*ifi))
return;
ifi = NLMSG_DATA(h);
_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_IFNAME) {
wpa_driver_nl80211_event_link(
drv, ctx,
((char *) attr) + rta_len,
attr->rta_len - rta_len, 1);
}
attr = RTA_NEXT(attr, attrlen);
}
}
static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx,
void *sock_ctx)
{
char buf[8192];
int left;
struct sockaddr_nl from;
socklen_t fromlen;
struct nlmsghdr *h;
int max_events = 10;
try_again:
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) {
wpa_printf(MSG_DEBUG, "Malformed netlink message: "
"len=%d left=%d plen=%d",
len, left, plen);
break;
}
switch (h->nlmsg_type) {
case RTM_NEWLINK:
wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
h, plen);
break;
case RTM_DELLINK:
wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
h, plen);
break;
}
len = NLMSG_ALIGN(len);
left -= len;
h = (struct nlmsghdr *) ((char *) h + len);
}
if (left > 0) {
wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
"message", left);
}
if (--max_events > 0) {
/*
* Try to receive all events in one eloop call in order to
* limit race condition on cases where AssocInfo event, Assoc
* event, and EAPOL frames are received more or less at the
* same time. We want to process the event messages first
* before starting EAPOL processing.
*/
goto try_again;
}
}
static int no_seq_check(struct nl_msg *msg, void *arg)
{
return NL_OK;
}
static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
const u8 *frame, size_t len)
{
const struct ieee80211_mgmt *mgmt;
union wpa_event_data event;
mgmt = (const struct ieee80211_mgmt *) frame;
if (len < 24 + sizeof(mgmt->u.auth)) {
wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
"frame");
return;
}
os_memset(&event, 0, sizeof(event));
os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
if (len > 24 + sizeof(mgmt->u.auth)) {
event.auth.ies = mgmt->u.auth.variable;
event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
}
wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
}
static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
const u8 *frame, size_t len)
{
const struct ieee80211_mgmt *mgmt;
union wpa_event_data event;
u16 status;
mgmt = (const struct ieee80211_mgmt *) frame;
if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
"frame");
return;
}
status = le_to_host16(mgmt->u.assoc_resp.status_code);
if (status != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_DEBUG, "nl80211: Association failed: status "
"code %d", status);
/* TODO: notify SME so that things like SA Query and comeback
* time can be implemented */
return;
}
drv->associated = 1;
os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
os_memset(&event, 0, sizeof(event));
if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
event.assoc_info.resp_ies_len =
len - 24 - sizeof(mgmt->u.assoc_req);
}
wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
}
static void mlme_event(struct wpa_driver_nl80211_data *drv,
enum nl80211_commands cmd, struct nlattr *frame)
{
if (frame == NULL) {
wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
"data", cmd);
return;
}
wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
nla_data(frame), nla_len(frame));
switch (cmd) {
case NL80211_CMD_AUTHENTICATE:
mlme_event_auth(drv, nla_data(frame), nla_len(frame));
break;
case NL80211_CMD_ASSOCIATE:
mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
break;
case NL80211_CMD_DEAUTHENTICATE:
drv->associated = 0;
wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
break;
case NL80211_CMD_DISASSOCIATE:
drv->associated = 0;
wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
break;
default:
break;
}
}
static int process_event(struct nl_msg *msg, void *arg)
{
struct wpa_driver_nl80211_data *drv = arg;
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *tb[NL80211_ATTR_MAX + 1];
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (tb[NL80211_ATTR_IFINDEX]) {
int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
if (ifindex != drv->ifindex) {
wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
" for foreign interface (ifindex %d)",
gnlh->cmd, ifindex);
return NL_SKIP;
}
}
switch (gnlh->cmd) {
case NL80211_CMD_NEW_SCAN_RESULTS:
wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
drv->scan_complete_events = 1;
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
drv->ctx);
wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
break;
case NL80211_CMD_SCAN_ABORTED:
wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
/*
* Need to indicate that scan results are available in order
* not to make wpa_supplicant stop its scanning.
*/
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
drv->ctx);
wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
break;
case NL80211_CMD_AUTHENTICATE:
case NL80211_CMD_ASSOCIATE:
case NL80211_CMD_DEAUTHENTICATE:
case NL80211_CMD_DISASSOCIATE:
mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
break;
default:
wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
"(cmd=%d)", gnlh->cmd);
break;
}
return NL_SKIP;
}
static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
void *sock_ctx)
{
struct nl_cb *cb;
struct wpa_driver_nl80211_data *drv = eloop_ctx;
wpa_printf(MSG_DEBUG, "nl80211: Event message available");
cb = nl_cb_clone(drv->nl_cb);
if (!cb)
return;
nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
nl_recvmsgs(drv->nl_handle, cb);
nl_cb_put(cb);
}
static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
const char *ifname, int *flags)
{
struct ifreq ifr;
os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
perror("ioctl[SIOCGIFFLAGS]");
return -1;
}
*flags = ifr.ifr_flags & 0xffff;
return 0;
}
/**
* wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
* @drv: driver_nl80211 private data
* @flags: Pointer to returned flags value
* Returns: 0 on success, -1 on failure
*/
static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
int *flags)
{
return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
}
static int wpa_driver_nl80211_set_ifflags_ifname(
struct wpa_driver_nl80211_data *drv,
const char *ifname, int flags)
{
struct ifreq ifr;
os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
ifr.ifr_flags = flags & 0xffff;
if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
perror("SIOCSIFFLAGS");
return -1;
}
return 0;
}
/**
* wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
* @drv: driver_nl80211 private data
* @flags: New value for flags
* Returns: 0 on success, -1 on failure
*/
static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
int flags)
{
return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
}
/**
* wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
* @priv: driver_nl80211 private data
* @alpha2_arg: country to which to switch to
* Returns: 0 on success, -1 on failure
*
* This asks nl80211 to set the regulatory domain for given
* country ISO / IEC alpha2.
*/
static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
{
struct wpa_driver_nl80211_data *drv = priv;
char alpha2[3];
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
goto nla_put_failure;
alpha2[0] = alpha2_arg[0];
alpha2[1] = alpha2_arg[1];
alpha2[2] = '\0';
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_REQ_SET_REG, 0);
NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
if (send_and_recv_msgs(drv, msg, NULL, NULL))
return -EINVAL;
return 0;
nla_put_failure:
return -EINVAL;
}
struct wiphy_info_data {
int max_scan_ssids;
};
static int wiphy_info_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct wiphy_info_data *info = arg;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
info->max_scan_ssids =
nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
return NL_SKIP;
}
static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
struct wiphy_info_data *info)
{
struct nl_msg *msg;
os_memset(info, 0, sizeof(*info));
msg = nlmsg_alloc();
if (!msg)
return -1;
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, drv->ifindex);
if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
return 0;
msg = NULL;
nla_put_failure:
nlmsg_free(msg);
return -1;
}
static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
{
struct wiphy_info_data info;
if (wpa_driver_nl80211_get_info(drv, &info))
return;
drv->has_capability = 1;
drv->capa.max_scan_ssids = info.max_scan_ssids;
}
/**
* wpa_driver_nl80211_init - Initialize nl80211 driver interface
* @ctx: context to be used when calling wpa_supplicant functions,
* e.g., wpa_supplicant_event()
* @ifname: interface name, e.g., wlan0
* Returns: Pointer to private data, %NULL on failure
*/
static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
{
int s, ret;
struct sockaddr_nl local;
struct wpa_driver_nl80211_data *drv;
drv = os_zalloc(sizeof(*drv));
if (drv == NULL)
return NULL;
drv->ctx = ctx;
os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
if (drv->nl_cb == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
"callbacks");
goto err1;
}
drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
if (drv->nl_handle == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
"callbacks");
goto err2;
}
if (genl_connect(drv->nl_handle)) {
wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
"netlink");
goto err3;
}
drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
if (drv->nl_cache == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
"netlink cache");
goto err3;
}
drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
if (drv->nl80211 == NULL) {
wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
"found");
goto err4;
}
ret = nl_get_multicast_id(drv, "nl80211", "scan");
if (ret >= 0)
ret = nl_socket_add_membership(drv->nl_handle, ret);
if (ret < 0) {
wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
"membership for scan events: %d (%s)",
ret, strerror(-ret));
goto err4;
}
ret = nl_get_multicast_id(drv, "nl80211", "mlme");
if (ret >= 0)
ret = nl_socket_add_membership(drv->nl_handle, ret);
#ifdef WEXT_COMPAT
if (ret < 0) {
wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
"membership for mlme events: %d (%s)",
ret, strerror(-ret));
/* Use WEXT for association request */
} else
drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
#else /* WEXT_COMPAT */
if (ret < 0) {
wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
"membership for mlme events: %d (%s)",
ret, strerror(-ret));
goto err4;
}
drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
#endif /* WEXT_COMPAT */
eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
wpa_driver_nl80211_event_receive, drv, ctx);
drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->ioctl_sock < 0) {
perror("socket(PF_INET,SOCK_DGRAM)");
goto err5;
}
s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (s < 0) {
perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
goto err6;
}
os_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);
goto err6;
}
eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv,
ctx);
drv->wext_event_sock = s;
if (wpa_driver_nl80211_finish_drv_init(drv))
goto err7;
return drv;
err7:
eloop_unregister_read_sock(drv->wext_event_sock);
close(drv->wext_event_sock);
err6:
close(drv->ioctl_sock);
err5:
genl_family_put(drv->nl80211);
err4:
nl_cache_free(drv->nl_cache);
err3:
nl_handle_destroy(drv->nl_handle);
err2:
nl_cb_put(drv->nl_cb);
err1:
os_free(drv);
return NULL;
}
static int
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
{
int flags;
if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
drv->ifname);
return -1;
}
if (!(flags & IFF_UP)) {
if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
wpa_printf(MSG_ERROR, "Could not set interface '%s' "
"UP", drv->ifname);
return -1;
}
}
/*
* Make sure that the driver does not have any obsolete PMKID entries.
*/
wpa_driver_nl80211_flush_pmkid(drv);
if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
printf("Could not configure driver to use managed mode\n");
}
wpa_driver_nl80211_get_range(drv);
drv->ifindex = if_nametoindex(drv->ifname);
wpa_driver_nl80211_capa(drv);
wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
return 0;
}
/**
* wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
* @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
*
* Shut down driver interface and processing of driver events. Free
* private data buffer if one was allocated in wpa_driver_nl80211_init().
*/
static void wpa_driver_nl80211_deinit(void *priv)
{
struct wpa_driver_nl80211_data *drv = priv;
int flags;
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
/*
* Clear possibly configured driver parameters in order to make it
* easier to use the driver after wpa_supplicant has been terminated.
*/
(void) wpa_driver_nl80211_set_bssid(drv,
(u8 *) "\x00\x00\x00\x00\x00\x00");
wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
eloop_unregister_read_sock(drv->wext_event_sock);
if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
(void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
close(drv->wext_event_sock);
close(drv->ioctl_sock);
#ifdef WEXT_COMPAT
os_free(drv->assoc_req_ies);
os_free(drv->assoc_resp_ies);
#endif /* WEXT_COMPAT */
eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
genl_family_put(drv->nl80211);
nl_cache_free(drv->nl_cache);
nl_handle_destroy(drv->nl_handle);
nl_cb_put(drv->nl_cb);
os_free(drv);
}
/**
* wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
* @eloop_ctx: Unused
* @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
*
* This function can be used as registered timeout when starting a scan to
* generate a scan completed event if the driver does not report this.
*/
static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
}
/**
* wpa_driver_nl80211_scan - Request the driver to initiate scan
* @priv: Pointer to private wext data from wpa_driver_nl80211_init()
* @params: Scan parameters
* Returns: 0 on success, -1 on failure
*/
static int wpa_driver_nl80211_scan(void *priv,
struct wpa_driver_scan_params *params)
{
struct wpa_driver_nl80211_data *drv = priv;
int ret = 0, timeout;
struct nl_msg *msg, *ssids;
size_t i;
msg = nlmsg_alloc();
ssids = nlmsg_alloc();
if (!msg || !ssids) {
nlmsg_free(msg);
nlmsg_free(ssids);
return -1;
}
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_TRIGGER_SCAN, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
for (i = 0; i < params->num_ssids; i++) {
NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
params->ssids[i].ssid);
}
if (params->num_ssids)
nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
if (params->extra_ies) {
NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
params->extra_ies);
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
}
/* Not all drivers generate "scan completed" wireless event, so try to
* read results after a timeout. */
timeout = 10;
if (drv->scan_complete_events) {
/*
* The driver seems to deliver events to notify when scan is
* complete, so use longer timeout to avoid race conditions
* with scanning and following association request.
*/
timeout = 30;
}
wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
"seconds", ret, timeout);
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
drv, drv->ctx);
nla_put_failure:
nlmsg_free(ssids);
nlmsg_free(msg);
return ret;
}
static int bss_info_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *bss[NL80211_BSS_MAX + 1];
static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
[NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
[NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
[NL80211_BSS_TSF] = { .type = NLA_U64 },
[NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
[NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
[NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
[NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
[NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
};
struct wpa_scan_results *res = arg;
struct wpa_scan_res **tmp;
struct wpa_scan_res *r;
const u8 *ie;
size_t ie_len;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[NL80211_ATTR_BSS])
return NL_SKIP;
if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
bss_policy))
return NL_SKIP;
if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
} else {
ie = NULL;
ie_len = 0;
}
r = os_zalloc(sizeof(*r) + ie_len);
if (r == NULL)
return NL_SKIP;
if (bss[NL80211_BSS_BSSID])
os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
ETH_ALEN);
if (bss[NL80211_BSS_FREQUENCY])
r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
if (bss[NL80211_BSS_BEACON_INTERVAL])
r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
if (bss[NL80211_BSS_CAPABILITY])
r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
r->flags |= WPA_SCAN_NOISE_INVALID;
if (bss[NL80211_BSS_SIGNAL_MBM]) {
r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
r->level /= 100; /* mBm to dBm */
r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
} else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
r->flags |= WPA_SCAN_LEVEL_INVALID;
} else
r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
if (bss[NL80211_BSS_TSF])
r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
r->ie_len = ie_len;
if (ie)
os_memcpy(r + 1, ie, ie_len);
tmp = os_realloc(res->res,
(res->num + 1) * sizeof(struct wpa_scan_res *));
if (tmp == NULL) {
os_free(r);
return NL_SKIP;
}
tmp[res->num++] = r;
res->res = tmp;
return NL_SKIP;
}
/**
* wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
* @priv: Pointer to private wext data from wpa_driver_nl80211_init()
* Returns: Scan results on success, -1 on failure
*/
static struct wpa_scan_results *
wpa_driver_nl80211_get_scan_results(void *priv)
{
struct wpa_driver_nl80211_data *drv = priv;
struct nl_msg *msg;
struct wpa_scan_results *res;
int ret;
res = os_zalloc(sizeof(*res));
if (res == NULL)
return 0;
msg = nlmsg_alloc();
if (!msg)
goto nla_put_failure;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
NL80211_CMD_GET_SCAN, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
msg = NULL;
if (ret == 0) {
wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
(unsigned long) res->num);
return res;
}
wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
"(%s)", ret, strerror(-ret));
nla_put_failure:
nlmsg_free(msg);
wpa_scan_results_free(res);
return NULL;
}
static int wpa_driver_nl80211_get_range(void *priv)
{
struct wpa_driver_nl80211_data *drv = priv;
struct iw_range *range;
struct iwreq iwr;
int minlen;
size_t buflen;
/*
* 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;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, 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]");
os_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->has_capability = 1;
drv->we_version_compiled = range->we_version_compiled;
if (range->enc_capa & IW_ENC_CAPA_WPA) {
drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
}
if (range->enc_capa & IW_ENC_CAPA_WPA2) {
drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
}
drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
WPA_DRIVER_CAPA_ENC_WEP104;
if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x",
drv->capa.key_mgmt, drv->capa.enc);
} else {
wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
"assuming WPA is not supported");
}
os_free(range);
return 0;
}
#ifdef WEXT_COMPAT
static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
{
struct wpa_driver_nl80211_data *drv = priv;
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
return 0;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
enabled);
}
#endif /* WEXT_COMPAT */
static int wpa_driver_nl80211_set_key(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 wpa_driver_nl80211_data *drv = priv;
int err;
struct nl_msg *msg;
wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
"seq_len=%lu key_len=%lu",
__func__, alg, addr, key_idx, set_tx,
(unsigned long) seq_len, (unsigned long) key_len);
msg = nlmsg_alloc();
if (msg == NULL)
return -1;
if (alg == WPA_ALG_NONE) {
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);
switch (alg) {
case WPA_ALG_WEP:
if (key_len == 5)
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
0x000FAC01);
else
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
0x000FAC05);
break;
case WPA_ALG_TKIP:
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
break;
case WPA_ALG_CCMP:
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
break;
default:
nlmsg_free(msg);
return -1;
}
}
if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
{
wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
}
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
err = send_and_recv_msgs(drv, msg, NULL, NULL);
if (err) {
wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
return -1;
}
if (set_tx && alg != WPA_ALG_NONE) {
msg = nlmsg_alloc();
if (msg == NULL)
return -1;
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, key_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
err = send_and_recv_msgs(drv, msg, NULL, NULL);
if (err) {
wpa_printf(MSG_DEBUG, "nl80211: set default key "
"failed; err=%d", err);
return -1;
}
}
return 0;
nla_put_failure:
return -ENOBUFS;
}
#ifdef WEXT_COMPAT
static int wpa_driver_nl80211_set_countermeasures(void *priv,
int enabled)
{
struct wpa_driver_nl80211_data *drv = priv;
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
return 0;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
return wpa_driver_nl80211_set_auth_param(drv,
IW_AUTH_TKIP_COUNTERMEASURES,
enabled);
}
#endif /* WEXT_COMPAT */
static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
int enabled)
{
struct wpa_driver_nl80211_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
#ifdef WEXT_COMPAT
drv->use_crypt = enabled;
#endif /* WEXT_COMPAT */
return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
enabled);
}
#ifdef WEXT_COMPAT
static int wpa_driver_nl80211_mlme_wext(struct wpa_driver_nl80211_data *drv,
const u8 *addr, int cmd,
int reason_code)
{
struct iwreq iwr;
struct iw_mlme mlme;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
os_memset(&mlme, 0, sizeof(mlme));
mlme.cmd = cmd;
mlme.reason_code = reason_code;
mlme.addr.sa_family = ARPHRD_ETHER;
os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
iwr.u.data.pointer = (caddr_t) &mlme;
iwr.u.data.length = sizeof(mlme);
if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
perror("ioctl[SIOCSIWMLME]");
ret = -1;
}
return ret;
}
#endif /* WEXT_COMPAT */
static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
const u8 *addr, int cmd, u16 reason_code)
{
int ret = -1;
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
}
ret = 0;
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
int reason_code)
{
struct wpa_driver_nl80211_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s", __func__);
#ifdef WEXT_COMPAT
if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
return wpa_driver_nl80211_mlme_wext(drv, addr, IW_MLME_DEAUTH,
reason_code);
#endif /* WEXT_COMPAT */
return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
reason_code);
}
static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
int reason_code)
{
struct wpa_driver_nl80211_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s", __func__);
#ifdef WEXT_COMPAT
if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
return wpa_driver_nl80211_mlme_wext(drv, addr,
IW_MLME_DISASSOC,
reason_code);
#endif /* WEXT_COMPAT */
return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
reason_code);
}
#ifdef WEXT_COMPAT
static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
size_t ie_len)
{
struct wpa_driver_nl80211_data *drv = priv;
struct iwreq iwr;
int ret = 0;
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
return 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.data.pointer = (caddr_t) ie;
iwr.u.data.length = ie_len;
if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
perror("ioctl[SIOCSIWGENIE]");
ret = -1;
}
return ret;
}
static int wpa_driver_nl80211_cipher2wext(int cipher)
{
switch (cipher) {
case CIPHER_NONE:
return IW_AUTH_CIPHER_NONE;
case CIPHER_WEP40:
return IW_AUTH_CIPHER_WEP40;
case CIPHER_TKIP:
return IW_AUTH_CIPHER_TKIP;
case CIPHER_CCMP:
return IW_AUTH_CIPHER_CCMP;
case CIPHER_WEP104:
return IW_AUTH_CIPHER_WEP104;
default:
return 0;
}
}
static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
{
switch (keymgmt) {
case KEY_MGMT_802_1X:
case KEY_MGMT_802_1X_NO_WPA:
return IW_AUTH_KEY_MGMT_802_1X;
case KEY_MGMT_PSK:
return IW_AUTH_KEY_MGMT_PSK;
default:
return 0;
}
}
static int
wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
struct wpa_driver_associate_params *params)
{
struct iwreq iwr;
int ret = 0;
wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
"SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
/* Just changing mode, not actual keys */
iwr.u.encoding.flags = 0;
iwr.u.encoding.pointer = (caddr_t) NULL;
iwr.u.encoding.length = 0;
/*
* Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
* different things. Here they are used to indicate Open System vs.
* Shared Key authentication algorithm. However, some drivers may use
* them to select between open/restricted WEP encrypted (open = allow
* both unencrypted and encrypted frames; restricted = only allow
* encrypted frames).
*/
if (!drv->use_crypt) {
iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
} else {
if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
iwr.u.encoding.flags |= IW_ENCODE_OPEN;
if (params->auth_alg & AUTH_ALG_SHARED_KEY)
iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
}
if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
perror("ioctl[SIOCSIWENCODE]");
ret = -1;
}
return ret;
}
static int wpa_driver_nl80211_associate_wext(
void *priv, struct wpa_driver_associate_params *params)
{
struct wpa_driver_nl80211_data *drv = priv;
int ret = 0;
int allow_unencrypted_eapol;
int value;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
/*
* If the driver did not support SIOCSIWAUTH, fallback to
* SIOCSIWENCODE here.
*/
if (drv->auth_alg_fallback &&
wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
ret = -1;
if (!params->bssid &&
wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
ret = -1;
/* TODO: should consider getting wpa version and cipher/key_mgmt suites
* from configuration, not from here, where only the selected suite is
* available */
if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
< 0)
ret = -1;
if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
value = IW_AUTH_WPA_VERSION_DISABLED;
else if (params->wpa_ie[0] == WLAN_EID_RSN)
value = IW_AUTH_WPA_VERSION_WPA2;
else
value = IW_AUTH_WPA_VERSION_WPA;
if (wpa_driver_nl80211_set_auth_param(drv,
IW_AUTH_WPA_VERSION, value) < 0)
ret = -1;
value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
if (wpa_driver_nl80211_set_auth_param(drv,
IW_AUTH_CIPHER_PAIRWISE, value) < 0)
ret = -1;
value = wpa_driver_nl80211_cipher2wext(params->group_suite);
if (wpa_driver_nl80211_set_auth_param(drv,
IW_AUTH_CIPHER_GROUP, value) < 0)
ret = -1;
value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
if (wpa_driver_nl80211_set_auth_param(drv,
IW_AUTH_KEY_MGMT, value) < 0)
ret = -1;
value = params->key_mgmt_suite != KEY_MGMT_NONE ||
params->pairwise_suite != CIPHER_NONE ||
params->group_suite != CIPHER_NONE ||
params->wpa_ie_len;
if (wpa_driver_nl80211_set_auth_param(drv,
IW_AUTH_PRIVACY_INVOKED, value) < 0)
ret = -1;
/* Allow unencrypted EAPOL messages even if pairwise keys are set when
* not using WPA. IEEE 802.1X specifies that these frames are not
* encrypted, but WPA encrypts them when pairwise keys are in use. */
if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
params->key_mgmt_suite == KEY_MGMT_PSK)
allow_unencrypted_eapol = 0;
else
allow_unencrypted_eapol = 1;
if (wpa_driver_nl80211_set_auth_param(drv,
IW_AUTH_RX_UNENCRYPTED_EAPOL,
allow_unencrypted_eapol) < 0)
ret = -1;
if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
ret = -1;
if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
ret = -1;
if (params->bssid &&
wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
ret = -1;
return ret;
}
static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
{
struct wpa_driver_nl80211_data *drv = priv;
int algs = 0, res;
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
return 0;
if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
algs |= IW_AUTH_ALG_OPEN_SYSTEM;
if (auth_alg & AUTH_ALG_SHARED_KEY)
algs |= IW_AUTH_ALG_SHARED_KEY;
if (auth_alg & AUTH_ALG_LEAP)
algs |= IW_AUTH_ALG_LEAP;
if (algs == 0) {
/* at least one algorithm should be set */
algs = IW_AUTH_ALG_OPEN_SYSTEM;
}
res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
algs);
drv->auth_alg_fallback = res == -2;
return res;
}
#endif /* WEXT_COMPAT */
static int wpa_driver_nl80211_authenticate(
void *priv, struct wpa_driver_auth_params *params)
{
struct wpa_driver_nl80211_data *drv = priv;
int ret = -1;
struct nl_msg *msg;
enum nl80211_auth_type type;
drv->associated = 0;
msg = nlmsg_alloc();
if (!msg)
return -1;
wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
drv->ifindex);
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_AUTHENTICATE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
if (params->bssid) {
wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
MAC2STR(params->bssid));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
}
if (params->freq) {
wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
}
if (params->ssid) {
wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
params->ssid, params->ssid_len);
NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
params->ssid);
}
wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
if (params->ie)
NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
/*
* TODO: if multiple auth_alg options enabled, try them one by one if
* the AP rejects authentication due to unknown auth alg
*/
if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
type = NL80211_AUTHTYPE_OPEN_SYSTEM;
else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
type = NL80211_AUTHTYPE_SHARED_KEY;
else if (params->auth_alg & AUTH_ALG_LEAP)
type = NL80211_AUTHTYPE_NETWORK_EAP;
else if (params->auth_alg & AUTH_ALG_FT)
type = NL80211_AUTHTYPE_FT;
else
goto nla_put_failure;
wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
}
ret = 0;
wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
"successfully");
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_associate(
void *priv, struct wpa_driver_associate_params *params)
{
struct wpa_driver_nl80211_data *drv = priv;
int ret = -1;
struct nl_msg *msg;
#ifdef WEXT_COMPAT
if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
return wpa_driver_nl80211_associate_wext(drv, params);
#endif /* WEXT_COMPAT */
drv->associated = 0;
msg = nlmsg_alloc();
if (!msg)
return -1;
wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
drv->ifindex);
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_ASSOCIATE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
if (params->bssid) {
wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
MAC2STR(params->bssid));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
}
if (params->freq) {
wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
}
if (params->ssid) {
wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
params->ssid, params->ssid_len);
NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
params->ssid);
}
wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
if (params->wpa_ie)
NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
params->wpa_ie);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
}
ret = 0;
wpa_printf(MSG_DEBUG, "nl80211: Association request send "
"successfully");
nla_put_failure:
nlmsg_free(msg);
return ret;
}
/**
* wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
* @priv: Pointer to private wext data from wpa_driver_nl80211_init()
* @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
* Returns: 0 on success, -1 on failure
*/
static int wpa_driver_nl80211_set_mode(void *priv, int mode)
{
struct wpa_driver_nl80211_data *drv = priv;
int ret = -1, flags;
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, drv->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (!ret)
return 0;
else
goto try_again;
nla_put_failure:
wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode");
return -1;
try_again:
/* mac80211 doesn't allow mode changes while the device is up, so
* take the device down, try to set the mode again, and bring the
* device back up.
*/
if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
(void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
/* Try to set the mode again while the interface is down */
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, drv->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
mode ? NL80211_IFTYPE_ADHOC :
NL80211_IFTYPE_STATION);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret) {
wpa_printf(MSG_ERROR, "Failed to set interface %s "
"mode", drv->ifname);
}
/* Ignore return value of get_ifflags to ensure that the device
* is always up like it was before this function was called.
*/
(void) wpa_driver_nl80211_get_ifflags(drv, &flags);
(void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
}
return ret;
}
static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
u32 cmd, const u8 *bssid, const u8 *pmkid)
{
struct iwreq iwr;
struct iw_pmksa pmksa;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
os_memset(&pmksa, 0, sizeof(pmksa));
pmksa.cmd = cmd;
pmksa.bssid.sa_family = ARPHRD_ETHER;
if (bssid)
os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
if (pmkid)
os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
iwr.u.data.pointer = (caddr_t) &pmksa;
iwr.u.data.length = sizeof(pmksa);
if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
if (errno != EOPNOTSUPP)
perror("ioctl[SIOCSIWPMKSA]");
ret = -1;
}
return ret;
}
static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
const u8 *pmkid)
{
struct wpa_driver_nl80211_data *drv = priv;
return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
}
static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
const u8 *pmkid)
{
struct wpa_driver_nl80211_data *drv = priv;
return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
}
static int wpa_driver_nl80211_flush_pmkid(void *priv)
{
struct wpa_driver_nl80211_data *drv = priv;
return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
}
static int wpa_driver_nl80211_get_capa(void *priv,
struct wpa_driver_capa *capa)
{
struct wpa_driver_nl80211_data *drv = priv;
if (!drv->has_capability)
return -1;
os_memcpy(capa, &drv->capa, sizeof(*capa));
return 0;
}
static int wpa_driver_nl80211_set_operstate(void *priv, int state)
{
struct wpa_driver_nl80211_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
__func__, drv->operstate, state, state ? "UP" : "DORMANT");
drv->operstate = state;
return wpa_driver_nl80211_send_oper_ifla(
drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
}
const struct wpa_driver_ops wpa_driver_nl80211_ops = {
.name = "nl80211",
.desc = "Linux nl80211/cfg80211",
.get_bssid = wpa_driver_nl80211_get_bssid,
.get_ssid = wpa_driver_nl80211_get_ssid,
.set_key = wpa_driver_nl80211_set_key,
.set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
.scan2 = wpa_driver_nl80211_scan,
.get_scan_results2 = wpa_driver_nl80211_get_scan_results,
.deauthenticate = wpa_driver_nl80211_deauthenticate,
.disassociate = wpa_driver_nl80211_disassociate,
.set_mode = wpa_driver_nl80211_set_mode,
.authenticate = wpa_driver_nl80211_authenticate,
.associate = wpa_driver_nl80211_associate,
.init = wpa_driver_nl80211_init,
.deinit = wpa_driver_nl80211_deinit,
.add_pmkid = wpa_driver_nl80211_add_pmkid,
.remove_pmkid = wpa_driver_nl80211_remove_pmkid,
.flush_pmkid = wpa_driver_nl80211_flush_pmkid,
.get_capa = wpa_driver_nl80211_get_capa,
.set_operstate = wpa_driver_nl80211_set_operstate,
.set_country = wpa_driver_nl80211_set_country,
#ifdef WEXT_COMPAT
.set_wpa = wpa_driver_nl80211_set_wpa,
.set_countermeasures = wpa_driver_nl80211_set_countermeasures,
.set_auth_alg = wpa_driver_nl80211_set_auth_alg,
#endif /* WEXT_COMPAT */
};
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