nl80211: Use valid_links bitmask for bss->links array
Most places in the codebase use a valid_links bitmask with an array. Switch the bss->links array to use the same design with the Link ID being used as the array index instead of having a link_id inside. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
This commit is contained in:
Benjamin Berg
Jouni Malinen
parent
9ed51186e8
commit
0d4288a005
4 changed files with 112 additions and 142 deletions
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@ -2289,7 +2289,6 @@ static void * wpa_driver_nl80211_drv_init(void *ctx, const char *ifname,
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{
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struct wpa_driver_nl80211_data *drv;
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struct i802_bss *bss;
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unsigned int i;
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char path[128], buf[200], *pos;
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ssize_t len;
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int ret;
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@ -2389,16 +2388,12 @@ skip_wifi_status:
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}
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/*
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* Set the default link to be the first one, and set its address to that
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* of the interface.
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* Use link ID 0 for the single "link" of a non-MLD.
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*/
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bss->valid_links = 0;
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bss->flink = &bss->links[0];
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bss->n_links = 1;
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os_memcpy(bss->flink->addr, bss->addr, ETH_ALEN);
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for (i = 0; i < MAX_NUM_MLD_LINKS; i++)
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bss->links[i].link_id = NL80211_DRV_LINK_ID_NA;
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return bss;
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failed:
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@ -3073,10 +3068,11 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
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static int wpa_driver_nl80211_del_beacon(struct i802_bss *bss,
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struct i802_link *link)
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int link_id)
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{
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struct nl_msg *msg;
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struct wpa_driver_nl80211_data *drv = bss->drv;
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struct i802_link *link = nl80211_get_link(bss, link_id);
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if (!link->beacon_set)
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return 0;
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@ -3091,13 +3087,12 @@ static int wpa_driver_nl80211_del_beacon(struct i802_bss *bss,
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if (!msg)
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return -ENOBUFS;
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if (link->link_id != NL80211_DRV_LINK_ID_NA) {
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if (link_id != NL80211_DRV_LINK_ID_NA) {
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wpa_printf(MSG_DEBUG,
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"nl80211: MLD: stop beaconing on link=%u",
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link->link_id);
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link_id);
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if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID,
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link->link_id)) {
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if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id)) {
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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@ -3109,10 +3104,10 @@ static int wpa_driver_nl80211_del_beacon(struct i802_bss *bss,
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static void wpa_driver_nl80211_del_beacon_all(struct i802_bss *bss)
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{
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unsigned int i;
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int link_id;
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for (i = 0; i < bss->n_links; i++)
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wpa_driver_nl80211_del_beacon(bss, &bss->links[i]);
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for_each_link_default(bss->valid_links, link_id, NL80211_DRV_LINK_ID_NA)
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wpa_driver_nl80211_del_beacon(bss, link_id);
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}
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@ -4193,14 +4188,11 @@ int wpa_driver_nl80211_authenticate_retry(struct wpa_driver_nl80211_data *drv)
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struct i802_link * nl80211_get_link(struct i802_bss *bss, s8 link_id)
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{
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unsigned int i;
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if (link_id < 0 || link_id >= MAX_NUM_MLD_LINKS)
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return bss->flink;
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for (i = 0; i < bss->n_links; i++) {
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if (bss->links[i].link_id != link_id)
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continue;
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return &bss->links[i];
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}
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if (BIT(link_id) & bss->valid_links)
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return &bss->links[link_id];
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return bss->flink;
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}
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@ -4217,9 +4209,9 @@ static void nl80211_link_set_freq(struct i802_bss *bss, s8 link_id, int freq)
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static int nl80211_get_link_freq(struct i802_bss *bss, const u8 *addr,
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bool bss_freq_debug)
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{
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size_t i;
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u8 i;
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for (i = 0; i < bss->n_links; i++) {
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for_each_link(bss->valid_links, i) {
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if (ether_addr_equal(bss->links[i].addr, addr)) {
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wpa_printf(MSG_DEBUG,
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"nl80211: Use link freq=%d for address "
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@ -5060,20 +5052,18 @@ static int wpa_driver_nl80211_set_ap(void *priv,
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#endif /* CONFIG_MESH */
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if (params->mld_ap) {
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size_t i;
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for (i = 0; i < bss->n_links; i++) {
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if (bss->links[i].link_id == params->mld_link_id) {
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link = &bss->links[i];
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break;
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}
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}
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if (i == bss->n_links) {
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wpa_printf(MSG_DEBUG, "nl80211: Link ID=%u not found",
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params->mld_link_id);
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if (!nl80211_link_valid(bss->valid_links,
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params->mld_link_id)) {
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wpa_printf(MSG_DEBUG,
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"nl80211: Link ID=%u invalid (valid: 0x%04x)",
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params->mld_link_id, bss->valid_links);
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return -EINVAL;
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}
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link = nl80211_get_link(bss, params->mld_link_id);
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} else if (bss->valid_links) {
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wpa_printf(MSG_DEBUG, "nl80211: MLD configuration expected");
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return -EINVAL;
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}
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beacon_set = params->reenable ? 0 : link->beacon_set;
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@ -5483,27 +5473,6 @@ fail:
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}
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static bool nl80211_link_valid(struct i802_bss *bss, s8 link_id)
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{
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unsigned int i;
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if (link_id < 0)
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return false;
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for (i = 0; i < bss->n_links; i++) {
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wpa_printf(MSG_DEBUG, "nl80211: %s - i=%u, link_id=%u",
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__func__, i, bss->links[i].link_id);
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if (bss->links[i].link_id == NL80211_DRV_LINK_ID_NA)
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continue;
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if (bss->links[i].link_id == link_id)
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return true;
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}
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return false;
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}
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static int nl80211_set_channel(struct i802_bss *bss,
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struct hostapd_freq_params *freq, int set_chan)
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{
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@ -5524,7 +5493,7 @@ static int nl80211_set_channel(struct i802_bss *bss,
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return -1;
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}
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if (nl80211_link_valid(bss, freq->link_id)) {
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if (nl80211_link_valid(bss->valid_links, freq->link_id)) {
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wpa_printf(MSG_DEBUG, "nl80211: Set link_id=%u for freq",
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freq->link_id);
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@ -8886,7 +8855,6 @@ static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
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if (type == WPA_IF_AP_BSS && setup_ap) {
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struct i802_bss *new_bss = os_zalloc(sizeof(*new_bss));
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unsigned int i;
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if (new_bss == NULL) {
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if (added)
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@ -8894,10 +8862,6 @@ static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
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return -1;
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}
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/* Initialize here before any failure path */
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for (i = 0; i < MAX_NUM_MLD_LINKS; i++)
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new_bss->links[i].link_id = NL80211_DRV_LINK_ID_NA;
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if (bridge &&
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i802_check_bridge(drv, new_bss, bridge, ifname) < 0) {
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wpa_printf(MSG_ERROR, "nl80211: Failed to add the new "
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@ -8922,7 +8886,7 @@ static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
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new_bss->drv = drv;
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new_bss->next = drv->first_bss->next;
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new_bss->flink = &new_bss->links[0];
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new_bss->n_links = 1;
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new_bss->valid_links = 0;
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os_memcpy(new_bss->flink->addr, new_bss->addr, ETH_ALEN);
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new_bss->flink->freq = drv->first_bss->flink->freq;
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@ -9464,33 +9428,35 @@ static void nl80211_remove_links(struct i802_bss *bss)
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struct wpa_driver_nl80211_data *drv = bss->drv;
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struct nl_msg *msg;
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int ret;
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u8 link_id;
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u8 link_id, i;
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if (bss->n_links == 0)
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return;
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while (bss->links[0].link_id != NL80211_DRV_LINK_ID_NA) {
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struct i802_link *link = &bss->links[0];
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for_each_link(bss->valid_links, link_id) {
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struct i802_link *link = &bss->links[link_id];
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wpa_printf(MSG_DEBUG, "nl80211: MLD: remove link_id=%u",
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link->link_id);
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link_id);
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wpa_driver_nl80211_del_beacon(bss, link);
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link_id = link->link_id;
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wpa_driver_nl80211_del_beacon(bss, link_id);
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/* First remove the link locally */
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if (bss->n_links == 1) {
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bss->flink->link_id = NL80211_DRV_LINK_ID_NA;
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bss->valid_links &= ~BIT(link_id);
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os_memset(link->addr, 0, ETH_ALEN);
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/* Choose new deflink if we are removing that link */
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if (bss->flink == link) {
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for_each_link_default(bss->valid_links, i, 0) {
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bss->flink = &bss->links[i];
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break;
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}
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}
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/* If this was the last link, reset default link */
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if (!bss->valid_links) {
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/* TODO: Does keeping freq/bandwidth make sense? */
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if (bss->flink != link)
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os_memcpy(bss->flink, link, sizeof(*link));
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os_memcpy(bss->flink->addr, bss->addr, ETH_ALEN);
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} else {
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struct i802_link *other = &bss->links[bss->n_links - 1];
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os_memcpy(link, other, sizeof(*link));
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other->link_id = NL80211_DRV_LINK_ID_NA;
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os_memset(other->addr, 0, ETH_ALEN);
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bss->n_links--;
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}
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/* Remove the link from the kernel */
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@ -9501,7 +9467,7 @@ static void nl80211_remove_links(struct i802_bss *bss)
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wpa_printf(MSG_ERROR,
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"nl80211: remove link (%d) failed",
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link_id);
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return;
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continue;
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}
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ret = send_and_recv_cmd(drv, msg);
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@ -9509,7 +9475,7 @@ static void nl80211_remove_links(struct i802_bss *bss)
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wpa_printf(MSG_ERROR,
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"nl80211: remove link (%d) failed. ret=%d (%s)",
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link_id, ret, strerror(-ret));
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return;
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continue;
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}
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}
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}
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@ -9524,7 +9490,7 @@ static int wpa_driver_nl80211_deinit_ap(void *priv)
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return -1;
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/* Stop beaconing */
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wpa_driver_nl80211_del_beacon(bss, bss->flink);
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wpa_driver_nl80211_del_beacon(bss, NL80211_DRV_LINK_ID_NA);
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nl80211_remove_links(bss);
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@ -9543,7 +9509,6 @@ static int wpa_driver_nl80211_stop_ap(void *priv, int link_id)
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{
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struct i802_bss *bss = priv;
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struct wpa_driver_nl80211_data *drv = bss->drv;
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unsigned int i;
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if (!is_ap_interface(drv->nlmode))
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return -1;
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@ -9553,13 +9518,9 @@ static int wpa_driver_nl80211_stop_ap(void *priv, int link_id)
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return 0;
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}
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for (i = 0; i < bss->n_links; ++i) {
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struct i802_link *link = &bss->links[i];
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if (link->link_id == link_id) {
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wpa_driver_nl80211_del_beacon(bss, link);
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return 0;
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}
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if (nl80211_link_valid(bss->valid_links, link_id)) {
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wpa_driver_nl80211_del_beacon(bss, link_id);
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return 0;
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}
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return -1;
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@ -13804,7 +13765,6 @@ static int nl80211_link_add(void *priv, u8 link_id, const u8 *addr)
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struct i802_bss *bss = priv;
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struct wpa_driver_nl80211_data *drv = bss->drv;
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struct nl_msg *msg;
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unsigned int idx, i;
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int ret;
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wpa_printf(MSG_DEBUG, "nl80211: MLD: add link_id=%u, addr=" MACSTR,
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@ -13817,32 +13777,24 @@ static int nl80211_link_add(void *priv, u8 link_id, const u8 *addr)
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return -EINVAL;
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}
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if (bss->n_links >= MAX_NUM_MLD_LINKS) {
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wpa_printf(MSG_DEBUG, "nl80211: MLD: already have n_links=%zu",
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bss->n_links);
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if (link_id >= MAX_NUM_MLD_LINKS) {
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wpa_printf(MSG_DEBUG,
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"nl80211: invalid link_id=%u", link_id);
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return -EINVAL;
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}
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for (i = 0; i < bss->n_links; i++) {
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if (bss->links[i].link_id == link_id &&
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bss->links[i].beacon_set) {
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wpa_printf(MSG_DEBUG,
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"nl80211: MLD: link already set");
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return -EINVAL;
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}
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if (bss->valid_links & BIT(link_id)) {
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wpa_printf(MSG_DEBUG,
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"nl80211: MLD: Link %u already set", link_id);
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return -EINVAL;
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}
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/* try using the first link entry, assuming it is not beaconing yet */
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if (bss->n_links == 1 &&
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bss->flink->link_id == NL80211_DRV_LINK_ID_NA) {
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if (!bss->valid_links) {
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/* Becoming MLD, verify we were not beaconing */
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if (bss->flink->beacon_set) {
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wpa_printf(MSG_DEBUG, "nl80211: BSS already beaconing");
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return -EINVAL;
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}
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idx = 0;
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} else {
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idx = bss->n_links;
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}
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msg = nl80211_drv_msg(drv, 0, NL80211_CMD_ADD_LINK);
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@ -13860,12 +13812,16 @@ static int nl80211_link_add(void *priv, u8 link_id, const u8 *addr)
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return ret;
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}
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bss->links[idx].link_id = link_id;
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os_memcpy(bss->links[idx].addr, addr, ETH_ALEN);
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os_memcpy(bss->links[link_id].addr, addr, ETH_ALEN);
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bss->n_links = idx + 1;
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/* The new link is the first one, make it the default */
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if (!bss->valid_links)
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bss->flink = &bss->links[link_id];
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wpa_printf(MSG_DEBUG, "nl80211: MLD: n_links=%zu", bss->n_links);
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bss->valid_links |= BIT(link_id);
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wpa_printf(MSG_DEBUG, "nl80211: MLD: valid_links=0x%04x",
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bss->valid_links);
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return 0;
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}
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@ -55,7 +55,6 @@ struct nl80211_wiphy_data {
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struct i802_link {
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unsigned int beacon_set:1;
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s8 link_id;
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int freq;
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int bandwidth;
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u8 addr[ETH_ALEN];
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@ -66,7 +65,7 @@ struct i802_bss {
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struct wpa_driver_nl80211_data *drv;
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struct i802_bss *next;
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size_t n_links;
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u16 valid_links;
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struct i802_link links[MAX_NUM_MLD_LINKS];
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struct i802_link *flink;
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@ -354,6 +353,18 @@ const char * nl80211_iftype_str(enum nl80211_iftype mode);
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void nl80211_restore_ap_mode(struct i802_bss *bss);
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struct i802_link * nl80211_get_link(struct i802_bss *bss, s8 link_id);
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static inline bool nl80211_link_valid(u16 links, s8 link_id)
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{
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if (link_id < 0 || link_id >= MAX_NUM_MLD_LINKS)
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return false;
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if (links & BIT(link_id))
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return true;
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return false;
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}
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static inline bool
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nl80211_attr_supported(struct wpa_driver_nl80211_data *drv, unsigned int attr)
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{
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@ -1610,18 +1610,17 @@ static void mlme_event_unprot_beacon(struct wpa_driver_nl80211_data *drv,
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}
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static struct i802_link *
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||||
nl80211_get_mld_link_by_freq(struct i802_bss *bss, unsigned int freq)
|
||||
static s8
|
||||
nl80211_get_link_id_by_freq(struct i802_bss *bss, unsigned int freq)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < bss->n_links; i++) {
|
||||
if ((unsigned int) bss->links[i].freq == freq &&
|
||||
bss->links[i].link_id != -1)
|
||||
return &bss->links[i];
|
||||
for_each_link(bss->valid_links, i) {
|
||||
if ((unsigned int) bss->links[i].freq == freq)
|
||||
return i;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
return NL80211_DRV_LINK_ID_NA;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1655,12 +1654,12 @@ static void mlme_event(struct i802_bss *bss,
|
|||
/* Determine the MLD link either by an explicitly provided link id or
|
||||
* finding a match based on the frequency. */
|
||||
if (link)
|
||||
mld_link = nl80211_get_link(bss, nla_get_u8(link));
|
||||
link_id = nla_get_u8(link);
|
||||
else if (freq)
|
||||
mld_link = nl80211_get_mld_link_by_freq(bss, nla_get_u32(freq));
|
||||
link_id = nl80211_get_link_id_by_freq(bss, nla_get_u32(freq));
|
||||
|
||||
if (mld_link)
|
||||
link_id = mld_link->link_id;
|
||||
if (nl80211_link_valid(bss->valid_links, link_id))
|
||||
mld_link = nl80211_get_link(bss, link_id);
|
||||
|
||||
data = nla_data(frame);
|
||||
len = nla_len(frame);
|
||||
|
|
@ -1912,7 +1911,7 @@ static void mlme_event_dh_event(struct wpa_driver_nl80211_data *drv,
|
|||
os_memset(&data, 0, sizeof(data));
|
||||
addr = nla_data(tb[NL80211_ATTR_MAC]);
|
||||
|
||||
if (bss->links[0].link_id == NL80211_DRV_LINK_ID_NA &&
|
||||
if (!bss->valid_links &&
|
||||
(tb[NL80211_ATTR_MLO_LINK_ID] ||
|
||||
tb[NL80211_ATTR_MLD_ADDR])) {
|
||||
wpa_printf(MSG_ERROR,
|
||||
|
|
@ -2176,7 +2175,7 @@ static void nl80211_new_station_event(struct wpa_driver_nl80211_data *drv,
|
|||
u8 *req_ies = NULL, *resp_ies = NULL;
|
||||
size_t req_ies_len = 0, resp_ies_len = 0;
|
||||
|
||||
if (bss->links[0].link_id == NL80211_DRV_LINK_ID_NA &&
|
||||
if (!bss->valid_links &&
|
||||
(tb[NL80211_ATTR_MLO_LINK_ID] ||
|
||||
tb[NL80211_ATTR_MLD_ADDR])) {
|
||||
wpa_printf(MSG_ERROR,
|
||||
|
|
@ -2444,7 +2443,6 @@ static void nl80211_radar_event(struct wpa_driver_nl80211_data *drv,
|
|||
{
|
||||
union wpa_event_data data;
|
||||
enum nl80211_radar_event event_type;
|
||||
struct i802_link *mld_link = NULL;
|
||||
|
||||
if (!tb[NL80211_ATTR_WIPHY_FREQ] || !tb[NL80211_ATTR_RADAR_EVENT])
|
||||
return;
|
||||
|
|
@ -2455,10 +2453,9 @@ static void nl80211_radar_event(struct wpa_driver_nl80211_data *drv,
|
|||
event_type = nla_get_u32(tb[NL80211_ATTR_RADAR_EVENT]);
|
||||
|
||||
if (data.dfs_event.freq) {
|
||||
mld_link = nl80211_get_mld_link_by_freq(drv->first_bss,
|
||||
data.dfs_event.freq);
|
||||
if (mld_link)
|
||||
data.dfs_event.link_id = mld_link->link_id;
|
||||
data.dfs_event.link_id =
|
||||
nl80211_get_link_id_by_freq(drv->first_bss,
|
||||
data.dfs_event.freq);
|
||||
}
|
||||
|
||||
/* Check HT params */
|
||||
|
|
@ -2824,7 +2821,6 @@ static void qca_nl80211_dfs_offload_radar_event(
|
|||
{
|
||||
union wpa_event_data data;
|
||||
struct nlattr *tb[NL80211_ATTR_MAX + 1];
|
||||
struct i802_link *mld_link = NULL;
|
||||
|
||||
wpa_printf(MSG_DEBUG,
|
||||
"nl80211: DFS offload radar vendor event received");
|
||||
|
|
@ -2844,10 +2840,9 @@ static void qca_nl80211_dfs_offload_radar_event(
|
|||
data.dfs_event.link_id = NL80211_DRV_LINK_ID_NA;
|
||||
|
||||
if (data.dfs_event.freq) {
|
||||
mld_link = nl80211_get_mld_link_by_freq(drv->first_bss,
|
||||
data.dfs_event.freq);
|
||||
if (mld_link)
|
||||
data.dfs_event.link_id = mld_link->link_id;
|
||||
data.dfs_event.link_id =
|
||||
nl80211_get_link_id_by_freq(drv->first_bss,
|
||||
data.dfs_event.freq);
|
||||
}
|
||||
|
||||
wpa_printf(MSG_DEBUG, "nl80211: DFS event on freq %d MHz, link=%d",
|
||||
|
|
|
|||
|
|
@ -603,6 +603,14 @@ char * get_param(const char *cmd, const char *param);
|
|||
for ((__i) = 0; (__i) < MAX_NUM_MLD_LINKS; (__i)++) \
|
||||
if ((__links) & BIT(__i))
|
||||
|
||||
/* Iterate all links, or, if no link is defined, iterate given index */
|
||||
#define for_each_link_default(_links, _i, _def_idx) \
|
||||
for ((_i) = (_links) ? 0 : (_def_idx); \
|
||||
(_i) < MAX_NUM_MLD_LINKS || \
|
||||
(!(_links) && (_i) == (_def_idx)); \
|
||||
(_i)++) \
|
||||
if (!(_links) || (_links) & BIT(_i))
|
||||
|
||||
void forced_memzero(void *ptr, size_t len);
|
||||
|
||||
/*
|
||||
|
|
|
|||
Loading…
Reference in a new issue