Update WOL_BCAST environment variable to a consistent default value

scripts/auto-boot-ollama-host.lua

@@ -24,7 +24,7 @@ local ERROR_PATTERN  = getenv(
 
 -- Optional Wake-on-LAN
 local WOL_MAC   = getenv("WOL_MAC", "")                       -- e.g. "AA:BB:CC:DD:EE:FF"
-local WOL_BCAST = getenv("WOL_BCAST", "255.255.255.255")
+local WOL_BCAST = getenv("WOL_BCAST", "192.168.222.255")
 local WOL_PORT  = tonumber(getenv("WOL_PORT", "9"))
 
 -- Optional: wait for service to come up (kept commented to stay minimal)
@@ -46,14 +46,26 @@ local function send_wol(mac_str, bcast_ip, port)
   local mb = mac_to_bytes(mac_str)
   if not mb then return false, "invalid MAC" end
   local packet = string.rep(string.char(0xFF), 6) .. mb:rep(16)
+
   local udp = assert(socket.udp())
   udp:settimeout(2)
-  pcall(function() assert(udp:setoption("broadcast", true)) end)
+
+  -- Optional: bind to a specific source IP (helps in host network with multi-NIC)
+  local WOL_SRC_IP = os.getenv("WOL_SRC_IP")
+  if WOL_SRC_IP and WOL_SRC_IP ~= "" then
+    assert(udp:setsockname(WOL_SRC_IP, 0))
+  end
+
+  -- IMPORTANT: must be true or Linux will return EACCES on broadcast sendto()
+  assert(udp:setoption("broadcast", true))
+
   local ok, err = udp:sendto(packet, bcast_ip, port)
   udp:close()
-  return ok ~= nil, err
+  if not ok then return false, err end
+  return true
 end
 
+
 -- Kept for reference; not used to keep parity with your minimal bash
 -- local function port_is_up(host, port, timeout_sec)
 --   local deadline = socket.gettime() + (timeout_sec or 1)