openwrt/package/network/services/hostapd/patches/740-snoop_iface.patch

--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -278,6 +278,7 @@ struct hostapd_bss_config {
 	char iface[IFNAMSIZ + 1];
 	char bridge[IFNAMSIZ + 1];
 	char ft_iface[IFNAMSIZ + 1];
+	char snoop_iface[IFNAMSIZ + 1];
 	char vlan_bridge[IFNAMSIZ + 1];
 	char wds_bridge[IFNAMSIZ + 1];
 
--- a/src/ap/x_snoop.c
+++ b/src/ap/x_snoop.c
@@ -71,8 +71,12 @@ x_snoop_get_l2_packet(struct hostapd_dat
 {
 	struct hostapd_bss_config *conf = hapd->conf;
 	struct l2_packet_data *l2;
+	const char *ifname = conf->bridge;
 
-	l2 = l2_packet_init(conf->bridge, NULL, ETH_P_ALL, handler, hapd, 1);
+	if (conf->snoop_iface[0])
+		ifname = conf->snoop_iface;
+
+	l2 = l2_packet_init(ifname, NULL, ETH_P_ALL, handler, hapd, 1);
 	if (l2 == NULL) {
 		wpa_printf(MSG_DEBUG,
 			   "x_snoop: Failed to initialize L2 packet processing %s",
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -2357,6 +2357,8 @@ static int hostapd_config_fill(struct ho
 			   sizeof(conf->bss[0]->iface));
 	} else if (os_strcmp(buf, "bridge") == 0) {
 		os_strlcpy(bss->bridge, pos, sizeof(bss->bridge));
+	} else if (os_strcmp(buf, "snoop_iface") == 0) {
+		os_strlcpy(bss->snoop_iface, pos, sizeof(bss->snoop_iface));
 	} else if (os_strcmp(buf, "vlan_bridge") == 0) {
 		os_strlcpy(bss->vlan_bridge, pos, sizeof(bss->vlan_bridge));
 	} else if (os_strcmp(buf, "wds_bridge") == 0) {