lua: provide Lua tostring for sockaddr_t

diff --git a/daemon/lua/kres.lua b/daemon/lua/kres.lua
index 4756bc419cec36fd5ad6eeae7d7f53156f03279f..f0ef73212717534a8c7d50941263a792ffddeedd 100644 (file)
--- a/daemon/lua/kres.lua
+++ b/daemon/lua/kres.lua
@@ -239,6 +239,8 @@ local timeval_t = ffi.typeof('struct timeval')
 
 -- Metatype for sockaddr
 local addr_buf = ffi.new('char[16]')
+local str_addr_buf = ffi.new('char[46 + 1 + 6 + 1]') -- IPv6 + #port + \0
+local str_addr_buf_len = ffi.sizeof(str_addr_buf)
 local sockaddr_t = ffi.typeof('struct sockaddr')
 ffi.metatype( sockaddr_t, {
        __index = {
@@ -246,7 +248,17 @@ ffi.metatype( sockaddr_t, {
                ip = function (sa) return C.kr_inaddr(sa) end,
                family = function (sa) return C.kr_inaddr_family(sa) end,
                port = function (sa) return C.kr_inaddr_port(sa) end,
-       }
+       },
+       __tostring = function(sa)
+               assert(ffi.istype(sockaddr_t, sa))
+               local len = ffi.new('size_t[1]', str_addr_buf_len)
+               local ret = C.kr_inaddr_str(sa, str_addr_buf, len)
+               if ret ~= 0 then
+                       error('kr_inaddr_str failed: ' .. tostring(ret))
+               end
+               return ffi.string(str_addr_buf)
+       end,
+
 })
 
 -- Parametrized LRU table
@@ -890,6 +902,7 @@ kres = {
        -- Metatypes.  Beware that any pointer will be cast silently...
        pkt_t = function (udata) return ffi.cast('knot_pkt_t *', udata) end,
        request_t = function (udata) return ffi.cast('struct kr_request *', udata) end,
+       sockaddr_t = function (udata) return ffi.cast('struct sockaddr *', udata) end,
        -- Global API functions
        str2dname = function(name)
                if type(name) ~= 'string' then return end