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From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 3 Jul 2025 11:22:26 +0200
Subject: [PATCH] hostapd: add support for specifying the link id in the config
Makes it easier to dynamically manage links for a MLD at run time.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -4959,6 +4959,8 @@ static int hostapd_config_fill(struct ho
conf->punct_acs_threshold = val;
} else if (os_strcmp(buf, "mld_ap") == 0) {
bss->mld_ap = !!atoi(pos);
+ } else if (os_strcmp(buf, "mld_link_id") == 0) {
+ bss->mld_link_id = atoi(pos);
} else if (os_strcmp(buf, "mld_addr") == 0) {
if (hwaddr_aton(pos, bss->mld_addr)) {
wpa_printf(MSG_ERROR, "Line %d: Invalid mld_addr",
--- a/src/ap/ap_config.c
+++ b/src/ap/ap_config.c
@@ -179,6 +179,9 @@ void hostapd_config_defaults_bss(struct
#endif /* CONFIG_PASN */
bss->urnm_mfpr_x20 = -1;
bss->urnm_mfpr = -1;
+#ifdef CONFIG_IEEE80211BE
+ bss->mld_link_id = -1;
+#endif
#ifdef CONFIG_ENC_ASSOC
bss->assoc_frame_encryption = 0;
bss->pmksa_caching_privacy = 0;
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -979,6 +979,8 @@ struct hostapd_bss_config {
/* The AP's MLD MAC address within the AP MLD */
u8 mld_addr[ETH_ALEN];
+ s8 mld_link_id;
+
#ifdef CONFIG_TESTING_OPTIONS
/*
* If set indicate the AP as disabled in the RNR element included in the
--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -3119,7 +3119,10 @@ struct hostapd_iface * hostapd_alloc_ifa
#ifdef CONFIG_IEEE80211BE
static void hostapd_bss_alloc_link_id(struct hostapd_data *hapd)
{
- hapd->mld_link_id = hapd->mld->next_link_id++;
+ if (hapd->conf->mld_link_id >= 0)
+ hapd->mld_link_id = hapd->conf->mld_link_id;
+ else
+ hapd->mld_link_id = hapd->mld->next_link_id++;
wpa_printf(MSG_DEBUG, "AP MLD: %s: Link ID %d assigned.",
hapd->mld->name, hapd->mld_link_id);
}
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