From 6d1e380666483efbffb17aa87a61e3f31c9249b7 Mon Sep 17 00:00:00 2001 From: David Bauer Date: Sun, 31 Oct 2021 00:11:51 +0200 Subject: [PATCH] hostapd: provide BSS-transition-queries to ubus subscribers Provide incoming BSS transition queries to ubus subscribers. This allows external steering daemons to provide clients with an optimal list of transition candidates. This commit has no functional state in case no ubus subscriber is present or it does not handle this ubus message. To prevent hostapd from sending out a generic response by itself, a subscribing daemon has to return a non-zero response code to hostapd. Signed-off-by: David Bauer --- .../hostapd/patches/600-ubus_support.patch | 16 ++++- .../services/hostapd/src/src/ap/ubus.c | 63 ++++++++++++++++--- 2 files changed, 69 insertions(+), 10 deletions(-) diff --git a/package/network/services/hostapd/patches/600-ubus_support.patch b/package/network/services/hostapd/patches/600-ubus_support.patch index bf2f8a52d195..58313f1ecdf1 100644 --- a/package/network/services/hostapd/patches/600-ubus_support.patch +++ b/package/network/services/hostapd/patches/600-ubus_support.patch @@ -515,7 +515,17 @@ --- a/src/ap/wnm_ap.c +++ b/src/ap/wnm_ap.c -@@ -463,7 +463,7 @@ static void ieee802_11_rx_bss_trans_mgmt +@@ -441,7 +441,8 @@ static void ieee802_11_rx_bss_trans_mgmt + wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries", + pos, end - pos); + +- ieee802_11_send_bss_trans_mgmt_request(hapd, addr, dialog_token); ++ if (!hostapd_ubus_notify_bss_transition_query(hapd, addr, dialog_token, reason, pos, end - pos)) ++ ieee802_11_send_bss_trans_mgmt_request(hapd, addr, dialog_token); + } + + +@@ -463,7 +464,7 @@ static void ieee802_11_rx_bss_trans_mgmt size_t len) { u8 dialog_token, status_code, bss_termination_delay; @@ -524,7 +534,7 @@ int enabled = hapd->conf->bss_transition; struct sta_info *sta; -@@ -510,6 +510,7 @@ static void ieee802_11_rx_bss_trans_mgmt +@@ -510,6 +511,7 @@ static void ieee802_11_rx_bss_trans_mgmt wpa_printf(MSG_DEBUG, "WNM: not enough room for Target BSSID field"); return; } @@ -532,7 +542,7 @@ sta->agreed_to_steer = 1; eloop_cancel_timeout(ap_sta_reset_steer_flag_timer, hapd, sta); eloop_register_timeout(2, 0, ap_sta_reset_steer_flag_timer, -@@ -529,6 +530,10 @@ static void ieee802_11_rx_bss_trans_mgmt +@@ -529,6 +531,10 @@ static void ieee802_11_rx_bss_trans_mgmt MAC2STR(addr), status_code, bss_termination_delay); } diff --git a/package/network/services/hostapd/src/src/ap/ubus.c b/package/network/services/hostapd/src/src/ap/ubus.c index 3e5456e695e9..20ee7c90e7d6 100644 --- a/package/network/services/hostapd/src/src/ap/ubus.c +++ b/package/network/services/hostapd/src/src/ap/ubus.c @@ -1850,13 +1850,30 @@ void hostapd_ubus_notify_radar_detected(struct hostapd_iface *iface, int frequen } } +#ifdef CONFIG_WNM_AP +static void hostapd_ubus_notify_bss_transition_add_candidate_list( + const u8 *candidate_list, u16 candidate_list_len) +{ + char *cl_str; + int i; + + if (candidate_list_len == 0) + return; + + cl_str = blobmsg_alloc_string_buffer(&b, "candidate-list", candidate_list_len * 2 + 1); + for (i = 0; i < candidate_list_len; i++) + snprintf(&cl_str[i*2], 3, "%02X", candidate_list[i]); + blobmsg_add_string_buffer(&b); + +} +#endif + void hostapd_ubus_notify_bss_transition_response( struct hostapd_data *hapd, const u8 *addr, u8 dialog_token, u8 status_code, u8 bss_termination_delay, const u8 *target_bssid, const u8 *candidate_list, u16 candidate_list_len) { #ifdef CONFIG_WNM_AP - char *cl_str; u16 i; if (!hapd->ubus.obj.has_subscribers) @@ -1872,13 +1889,45 @@ void hostapd_ubus_notify_bss_transition_response( blobmsg_add_u8(&b, "bss-termination-delay", bss_termination_delay); if (target_bssid) blobmsg_add_macaddr(&b, "target-bssid", target_bssid); - if (candidate_list_len > 0) { - cl_str = blobmsg_alloc_string_buffer(&b, "candidate-list", candidate_list_len * 2 + 1); - for (i = 0; i < candidate_list_len; i++) - snprintf(&cl_str[i*2], 3, "%02X", candidate_list[i]); - blobmsg_add_string_buffer(&b); - } + + hostapd_ubus_notify_bss_transition_add_candidate_list(candidate_list, candidate_list_len); ubus_notify(ctx, &hapd->ubus.obj, "bss-transition-response", b.head, -1); #endif } + +int hostapd_ubus_notify_bss_transition_query( + struct hostapd_data *hapd, const u8 *addr, u8 dialog_token, u8 reason, + const u8 *candidate_list, u16 candidate_list_len) +{ +#ifdef CONFIG_WNM_AP + struct ubus_event_req ureq = {}; + char *cl_str; + u16 i; + + if (!hapd->ubus.obj.has_subscribers) + return 0; + + if (!addr) + return 0; + + blob_buf_init(&b, 0); + blobmsg_add_macaddr(&b, "address", addr); + blobmsg_add_u8(&b, "dialog-token", dialog_token); + blobmsg_add_u8(&b, "reason", reason); + hostapd_ubus_notify_bss_transition_add_candidate_list(candidate_list, candidate_list_len); + + if (!hapd->ubus.notify_response) { + ubus_notify(ctx, &hapd->ubus.obj, "bss-transition-query", b.head, -1); + return 0; + } + + if (ubus_notify_async(ctx, &hapd->ubus.obj, "bss-transition-query", b.head, &ureq.nreq)) + return 0; + + ureq.nreq.status_cb = ubus_event_cb; + ubus_complete_request(ctx, &ureq.nreq.req, 100); + + return ureq.resp; +#endif +} \ No newline at end of file -- 2.30.2