Allow zero-length pong to be received by server

Client code already allows zero-length pongs

diff --git a/lib/parsers.c b/lib/parsers.c
index ef9c3e7..cec9585 100644 (file)
--- a/lib/parsers.c
+++ b/lib/parsers.c
@@ -985,7 +985,8 @@ ping_drop:
                                LWS_EXT_CALLBACK_PAYLOAD_RX, &eff_buf, 0) < 0)
                        return -1;
 
-               if (eff_buf.token_len > 0) {
+               if (eff_buf.token_len > 0 ||
+                   callback_action == LWS_CALLBACK_RECEIVE_PONG) {
                        eff_buf.token[eff_buf.token_len] = '\0';
 
                        if (wsi->protocol->callback) {