AP: Add support for setting bridge network parameter

This allows setting a network parameter on the bridge that the BSS
belongs to.

This commit adds the needed functionality in driver_nl80211.c for the
Linux bridge implementation. In theory, this could be shared with
multiple Linux driver interfaces, but for now, only the main nl80211
interface is supported.

Signed-off-by: Kyeyoon Park <kyeyoonp@qca.qualcomm.com>

diff --git a/src/ap/ap_drv_ops.h b/src/ap/ap_drv_ops.h
index 7cea317..e9f6618 100644 (file)
--- a/src/ap/ap_drv_ops.h
+++ b/src/ap/ap_drv_ops.h
@@ -310,6 +310,16 @@ static inline int hostapd_drv_br_port_set_attr(struct hostapd_data *hapd,
        return hapd->driver->br_port_set_attr(hapd->drv_priv, attr, val);
 }
 
+static inline int hostapd_drv_br_set_net_param(struct hostapd_data *hapd,
+                                              enum drv_br_net_param param,
+                                              unsigned int val)
+{
+       if (hapd->driver == NULL || hapd->drv_priv == NULL ||
+           hapd->driver->br_set_net_param == NULL)
+               return -1;
+       return hapd->driver->br_set_net_param(hapd->drv_priv, param, val);
+}
+
 static inline int hostapd_drv_vendor_cmd(struct hostapd_data *hapd,
                                         int vendor_id, int subcmd,
                                         const u8 *data, size_t data_len,

diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index 4c9bbc8..4645e9a 100644 (file)
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -1378,6 +1378,10 @@ enum drv_br_port_attr {
        DRV_BR_PORT_ATTR_HAIRPIN_MODE,
 };
 
+enum drv_br_net_param {
+       DRV_BR_NET_PARAM_GARP_ACCEPT,
+};
+
 
 /**
  * struct wpa_driver_ops - Driver interface API definition
@@ -2634,6 +2638,15 @@ struct wpa_driver_ops {
                                unsigned int val);
 
        /**
+        * br_port_set_attr - Set a bridge network parameter
+        * @param: Bridge parameter to set
+        * @val: Value to be set
+        * Returns: 0 on success, negative (<0) on failure
+        */
+       int (*br_set_net_param)(void *priv, enum drv_br_net_param param,
+                               unsigned int val);
+
+       /**
         * set_wowlan - Set wake-on-wireless triggers
         * @priv: Private driver interface data
         * @triggers: wowlan triggers

diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index d40a44a..68afcf0 100644 (file)
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -9035,6 +9035,47 @@ static int wpa_driver_br_port_set_attr(void *priv, enum drv_br_port_attr attr,
 }
 
 
+static const char * drv_br_net_param_str(enum drv_br_net_param param)
+{
+       switch (param) {
+       case DRV_BR_NET_PARAM_GARP_ACCEPT:
+               return "arp_accept";
+       }
+
+       return NULL;
+}
+
+
+static int wpa_driver_br_set_net_param(void *priv, enum drv_br_net_param param,
+                                      unsigned int val)
+{
+       struct i802_bss *bss = priv;
+       char path[128];
+       const char *param_txt;
+       int ip_version = 4;
+
+       param_txt = drv_br_net_param_str(param);
+       if (param_txt == NULL)
+               return -EINVAL;
+
+       switch (param) {
+               case DRV_BR_NET_PARAM_GARP_ACCEPT:
+                       ip_version = 4;
+                       break;
+               default:
+                       return -EINVAL;
+       }
+
+       os_snprintf(path, sizeof(path), "/proc/sys/net/ipv%d/conf/%s/%s",
+                   ip_version, bss->brname, param_txt);
+
+       if (linux_write_system_file(path, val))
+               return -1;
+
+       return 0;
+}
+
+
 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
        .name = "nl80211",
        .desc = "Linux nl80211/cfg80211",
@@ -9136,4 +9177,5 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
        .br_add_ip_neigh = wpa_driver_br_add_ip_neigh,
        .br_delete_ip_neigh = wpa_driver_br_delete_ip_neigh,
        .br_port_set_attr = wpa_driver_br_port_set_attr,
+       .br_set_net_param = wpa_driver_br_set_net_param,
 };