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nl80211: Introduce and implement a callback to add an MLO link for AP MLD

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Add a driver callback to add a link to an AP interface.
As the kernel removes all links on underline interface removal, there
is currently no need to support individual link removal.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
This commit is contained in:
Ilan Peer 2023-02-16 01:08:16 +02:00 committed by Jouni Malinen
parent 47269be36e
commit 821374d43a
2 changed files with 81 additions and 0 deletions
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9
src/drivers/driver.h
View file

@ -4962,6 +4962,15 @@ struct wpa_driver_ops {
int (*get_sta_mlo_info)(void *priv,
struct driver_sta_mlo_info *mlo_info);
/**
* link_add - Add a link to the AP MLD interface
* @priv: Private driver interface data
* @link_id: The link ID
* @addr: The MAC address to use for the link
* Returns: 0 on success, negative value on failure
*/
int (*link_add)(void *priv, u8 link_id, const u8 *addr);
#ifdef CONFIG_TESTING_OPTIONS
int (*register_frame)(void *priv, u16 type,
const u8 *match, size_t match_len,

72
src/drivers/driver_nl80211.c
View file

@ -13105,6 +13105,77 @@ static int nl80211_dpp_listen(void *priv, bool enable)
#endif /* CONFIG_DPP */
static int nl80211_link_add(void *priv, u8 link_id, const u8 *addr)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
unsigned int idx, i;
int ret;
wpa_printf(MSG_DEBUG, "nl80211: MLD: add link_id=%u, addr=" MACSTR,
link_id, MAC2STR(addr));
if (drv->nlmode != NL80211_IFTYPE_AP) {
wpa_printf(MSG_DEBUG,
"nl80211: MLD: cannot add link to iftype=%u",
drv->nlmode);
return -EINVAL;
}
if (bss->n_links >= MAX_NUM_MLD_LINKS) {
wpa_printf(MSG_DEBUG, "nl80211: MLD: already have n_links=%zu",
bss->n_links);
return -EINVAL;
}
for (i = 0; i < bss->n_links; i++) {
if (bss->links[i].link_id == link_id &&
bss->links[i].beacon_set) {
wpa_printf(MSG_DEBUG,
"nl80211: MLD: link already set");
return -EINVAL;
}
}
/* try using the first link entry, assuming it is not beaconing yet */
if (bss->n_links == 1 &&
bss->flink->link_id == NL80211_DRV_LINK_ID_NA) {
if (bss->flink->beacon_set) {
wpa_printf(MSG_DEBUG, "nl80211: BSS already beaconing");
return -EINVAL;
}
idx = 0;
} else {
idx = bss->n_links;
}
msg = nl80211_drv_msg(drv, 0, NL80211_CMD_ADD_LINK);
if (!msg ||
nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id) ||
nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) {
nlmsg_free(msg);
return -ENOBUFS;
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL, NULL, NULL);
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: add link failed. ret=%d (%s)",
ret, strerror(-ret));
return ret;
}
bss->links[idx].link_id = link_id;
os_memcpy(bss->links[idx].addr, addr, ETH_ALEN);
bss->n_links = idx + 1;
wpa_printf(MSG_DEBUG, "nl80211: MLD: n_links=%zu", bss->n_links);
return 0;
}
#ifdef CONFIG_TESTING_OPTIONS
static int testing_nl80211_register_frame(void *priv, u16 type,
@ -13297,6 +13368,7 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
.dpp_listen = nl80211_dpp_listen,
#endif /* CONFIG_DPP */
.get_sta_mlo_info = nl80211_get_sta_mlo_info,
.link_add = nl80211_link_add,
#ifdef CONFIG_TESTING_OPTIONS
.register_frame = testing_nl80211_register_frame,
.radio_disable = testing_nl80211_radio_disable,