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hostapd: make the snooping interface (for proxyarp) configurable

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Use the VLAN interface instead of the bridge, to ensure that hostapd receives
untagged DHCP packets

Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry-picked from commit 7b46377a0c)
(cherry-picked from commit f1b98fa4fa)
This commit is contained in:
Felix Fietkau 2021-07-27 20:28:58 +02:00
parent 93dc8760b0
commit c75d176882
2 changed files with 38 additions and 0 deletions
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1
package/network/services/hostapd/files/hostapd.sh
View File

@ -730,6 +730,7 @@ hostapd_set_bss_options() {
append bss_conf "ssid=$ssid" "$N"
[ -n "$network_bridge" ] && append bss_conf "bridge=$network_bridge" "$N"
[ -n "$network_ifname" ] && append bss_conf "snoop_iface=$network_ifname" "$N"
[ -n "$iapp_interface" ] && {
local ifname
network_get_device ifname "$iapp_interface" || ifname="$iapp_interface"

37
package/network/services/hostapd/patches/740-snoop_iface.patch Normal file
View File

@ -0,0 +1,37 @@
--- 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) {