bugfix: failed to get error message because the input buffer length is not set.

Author: zhuizhuhaomeng

lib/resty/core/request.lua

@@ -79,9 +79,10 @@ if subsystem == "stream" then
         local err = get_string_buf(ERR_BUF_SIZE)
         local errlenp = get_size_ptr()
         buf_sizep[0] = 128
+        errlenp[0] = ERR_BUF_SIZE
         rc = C.ngx_stream_lua_ffi_req_dst_addr(r, buf, buf_sizep, err, errlenp)
         if tonumber(rc) ~= 0 then
-            return nil, tostring(err, errlenp[0])
+            return nil, ffi_str(err, errlenp[0])
         end
 
         return ffi_str(buf, buf_sizep[0])

t/stream/request.t

@@ -41,6 +41,7 @@ stitch
 
 
 === TEST 2: get dst address
+SO_ORIGINAL_DST is only enable when the flow is redirect by iptables
 --- stream_server_config
     content_by_lua_block {
         local dst_addr = ngx.req.get_original_addr()
@@ -53,3 +54,4 @@ qr/127.0.0.1:\d+/
 [alert]
 [crit]
 [crit2]
+--- SKIP