hostapd: move mac address allocation from mac80211.sh to wdev.uc

[openwrt/openwrt.git] / package / network / services / hostapd / files / common.uc

diff --git a/package/network/services/hostapd/files/common.uc b/package/network/services/hostapd/files/common.uc
index 74c07855c958487cee27956ff8f6191e095781fa..f37804c8c6ec5678dbc8d50a3a572cd0999ed79e 100644 (file)
--- a/package/network/services/hostapd/files/common.uc
+++ b/package/network/services/hostapd/files/common.uc
@@ -94,6 +94,88 @@ function wdev_create(phy, name, data)
        return null;
 }
 
+function phy_sysfs_file(phy, name)
+{
+       return trim(readfile(`/sys/class/ieee80211/${phy}/${name}`));
+}
+
+function macaddr_split(str)
+{
+       return map(split(str, ":"), (val) => hex(val));
+}
+
+function macaddr_join(addr)
+{
+       return join(":", map(addr, (val) => sprintf("%02x", val)));
+}
+
+function wdev_generate_macaddr(phy, data)
+{
+       let idx = int(data.id ?? 0);
+       let mbssid = int(data.mbssid ?? 0) > 0;
+       let num_global = int(data.num_global ?? 1);
+       let use_global = !mbssid && idx < num_global;
+
+       let base_addr = phy_sysfs_file(phy, "macaddress");
+       if (!base_addr)
+               return null;
+
+       if (!idx && !mbssid)
+               return base_addr;
+
+       let base_mask = phy_sysfs_file(phy, "address_mask");
+       if (!base_mask)
+               return null;
+
+       if (base_mask == "00:00:00:00:00:00" && idx >= num_global) {
+               let addrs = split(phy_sysfs_file(phy, "addresses"), "\n");
+
+               if (idx < length(addrs))
+                       return addrs[idx];
+
+               base_mask = "ff:ff:ff:ff:ff:ff";
+       }
+
+       let addr = macaddr_split(base_addr);
+       let mask = macaddr_split(base_mask);
+       let type;
+
+       if (mbssid)
+               type = "b5";
+       else if (use_global)
+               type = "add";
+       else if (mask[0] > 0)
+               type = "b1";
+       else if (mask[5] < 0xff)
+               type = "b5";
+       else
+               type = "add";
+
+       switch (type) {
+       case "b1":
+               if (!(addr[0] & 2))
+                       idx--;
+               addr[0] |= 2;
+               addr[0] ^= idx << 2;
+               break;
+       case "b5":
+               if (mbssid)
+                       addr[0] |= 2;
+               addr[5] ^= idx;
+               break;
+       default:
+               for (let i = 5; i > 0; i--) {
+                       addr[i] += idx;
+                       if (addr[i] < 256)
+                               break;
+                       addr[i] %= 256;
+               }
+               break;
+       }
+
+       return macaddr_join(addr);
+}
+
 const vlist_proto = {
        update: function(values, arg) {
                let data = this.data;
@@ -165,4 +247,4 @@ function vlist_new(cb) {
                }, vlist_proto);
 }
 
-export { wdev_remove, wdev_create, is_equal, vlist_new, phy_is_fullmac };
+export { wdev_remove, wdev_create, wdev_generate_macaddr, is_equal, vlist_new, phy_is_fullmac };