mirror of
https://github.com/vanhoefm/fragattacks.git
synced 2024-11-25 00:38:24 -05:00
nl80211: Add per-BSS data structure and enable BSS add/remove
This allows mac80211 to be used for multi-BSSID operations.
This commit is contained in:
Jouni Malinen
Jouni Malinen
parent
86f4deb635
commit
816bce98e1
@ -54,6 +54,13 @@ enum ieee80211_msg_type {
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ieee80211_msg_tx_callback_fail = 2,
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};
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struct i802_bss {
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struct i802_bss *next;
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char iface[IFNAMSIZ + 1];
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int dtim_period;
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unsigned int beacon_set:1;
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};
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struct i802_driver_data {
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struct hostapd_data *hapd;
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@ -74,8 +81,8 @@ struct i802_driver_data {
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struct nl_cache *nl_cache;
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struct nl_cb *nl_cb;
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struct genl_family *nl80211;
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int dtim_period, beacon_int;
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unsigned int beacon_set:1;
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int beacon_int;
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struct i802_bss bss;
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unsigned int ieee802_1x_active:1;
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unsigned int ht_40mhz_scan:1;
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@ -90,6 +97,20 @@ static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
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static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
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static struct i802_bss * get_bss(struct i802_driver_data *drv,
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const char *iface)
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{
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struct i802_bss *bss = &drv->bss;
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while (bss) {
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if (os_strncmp(iface, bss->iface, IFNAMSIZ) == 0)
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return bss;
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bss = bss->next;
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}
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wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
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return NULL;
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}
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static void add_ifidx(struct i802_driver_data *drv, int ifidx)
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{
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int i;
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@ -1088,29 +1109,47 @@ static int nl80211_create_iface(struct i802_driver_data *drv,
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static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
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{
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struct i802_driver_data *drv = priv;
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int ifidx;
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struct i802_bss *bss;
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/*
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* The kernel supports that when the low-level driver does,
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* but we currently don't because we need per-BSS data that
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* currently we can't handle easily.
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*/
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return -1;
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bss = os_zalloc(sizeof(*bss));
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if (bss == NULL)
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return -1;
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os_strlcpy(bss->iface, ifname, IFNAMSIZ);
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ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
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if (ifidx < 0)
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return -1;
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if (hostapd_set_iface_flags(priv, ifname, 1)) {
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nl80211_remove_iface(priv, ifidx);
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if (ifidx < 0) {
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os_free(bss);
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return -1;
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}
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if (hostapd_set_iface_flags(priv, ifname, 1)) {
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nl80211_remove_iface(priv, ifidx);
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os_free(bss);
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return -1;
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}
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bss->next = drv->bss.next;
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drv->bss.next = bss;
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return 0;
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}
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static int i802_bss_remove(void *priv, const char *ifname)
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{
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struct i802_driver_data *drv = priv;
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struct i802_bss *bss, *prev;
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nl80211_remove_iface(priv, if_nametoindex(ifname));
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prev = &drv->bss;
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bss = drv->bss.next;
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while (bss) {
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if (os_strncmp(ifname, bss->iface, IFNAMSIZ) == 0) {
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prev->next = bss->next;
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os_free(bss);
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break;
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}
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prev = bss;
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bss = bss->next;
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}
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return 0;
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}
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@ -1123,12 +1162,19 @@ static int i802_set_beacon(const char *iface, void *priv,
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struct nl_msg *msg;
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u8 cmd = NL80211_CMD_NEW_BEACON;
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int ret;
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struct i802_bss *bss;
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bss = get_bss(drv, iface);
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if (bss == NULL)
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return -ENOENT;
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msg = nlmsg_alloc();
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if (!msg)
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return -ENOMEM;
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if (drv->beacon_set)
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wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
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iface, bss->beacon_set);
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if (bss->beacon_set)
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cmd = NL80211_CMD_SET_BEACON;
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genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
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@ -1138,13 +1184,13 @@ static int i802_set_beacon(const char *iface, void *priv,
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NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
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NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
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if (!drv->dtim_period)
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drv->dtim_period = 2;
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NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
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if (!bss->dtim_period)
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bss->dtim_period = 2;
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NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, bss->dtim_period);
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ret = send_and_recv_msgs(drv, msg, NULL, NULL);
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if (!ret)
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drv->beacon_set = 1;
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bss->beacon_set = 1;
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return ret;
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nla_put_failure:
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return -ENOBUFS;
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@ -1212,13 +1258,15 @@ static int i802_set_beacon_int(void *priv, int value)
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drv->beacon_int = value;
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if (!drv->beacon_set)
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if (!drv->bss.beacon_set)
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return 0;
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msg = nlmsg_alloc();
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if (!msg)
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return -ENOMEM;
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wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
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"(beacon_set=%d)", value, drv->bss.beacon_set);
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genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
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0, NL80211_CMD_SET_BEACON, 0);
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NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
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@ -1235,21 +1283,33 @@ static int i802_set_dtim_period(const char *iface, void *priv, int value)
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{
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struct i802_driver_data *drv = priv;
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struct nl_msg *msg;
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int ret = -ENOBUFS;
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struct i802_bss *bss;
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bss = get_bss(drv, iface);
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if (bss == NULL)
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return -ENOENT;
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msg = nlmsg_alloc();
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if (!msg)
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return -ENOMEM;
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wpa_printf(MSG_DEBUG, "nl80211: Set beacon DTIM period %d (iface=%s "
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"beacon_set=%d)", value, iface, bss->beacon_set);
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genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
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0, NL80211_CMD_SET_BEACON, 0);
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NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
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drv->dtim_period = value;
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NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
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bss->dtim_period = value;
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NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, bss->dtim_period);
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ret = send_and_recv_msgs(drv, msg, NULL, NULL);
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if (ret)
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wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_SET_BEACON(%s) "
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"result: %d (%s)", iface, ret, strerror(-ret));
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return send_and_recv_msgs(drv, msg, NULL, NULL);
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nla_put_failure:
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return -ENOBUFS;
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return ret;
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}
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@ -2961,6 +3021,7 @@ static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
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drv->hapd = hapd;
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memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
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memcpy(drv->bss.iface, hapd->conf->iface, sizeof(drv->iface));
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drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
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drv->if_indices = drv->default_if_indices;
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@ -2987,6 +3048,7 @@ static void *i802_init(struct hostapd_data *hapd)
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static void i802_deinit(void *priv)
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{
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struct i802_driver_data *drv = priv;
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struct i802_bss *bss, *prev;
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if (drv->last_freq_ht) {
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/* Clear HT flags from the driver */
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@ -3023,6 +3085,14 @@ static void i802_deinit(void *priv)
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free(drv->if_indices);
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os_free(drv->neighbors);
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bss = drv->bss.next;
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while (bss) {
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prev = bss;
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bss = bss->next;
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os_free(bss);
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}
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free(drv);
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}
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