socket_wrapper.c: let swrap_vioctl() handle SIOCOUTQ/TIOCOUTQ/FIONWRITE explicitly

[socket_wrapper.git] / src / socket_wrapper.c

diff --git a/src/socket_wrapper.c b/src/socket_wrapper.c
index fe67285c7bf0296df7c86007f3d0ba8801ed67eb..ffdd31a51bfdec2b1ce4fa5a8be2cf175fc55543 100644 (file)
--- a/src/socket_wrapper.c
+++ b/src/socket_wrapper.c
@@ -4751,6 +4751,24 @@ static int swrap_vioctl(int s, unsigned long int r, va_list va)
                        swrap_pcap_dump_packet(si, NULL, SWRAP_PENDING_RST, NULL, 0);
                }
                break;
+#ifdef FIONWRITE
+       case FIONWRITE:
+               /* this is FreeBSD */
+               FALL_THROUGH; /* to TIOCOUTQ */
+#endif /* FIONWRITE */
+       case TIOCOUTQ: /* same as SIOCOUTQ on Linux */
+               /*
+                * This may return more bytes then the application
+                * sent into the socket, for tcp it should
+                * return the number of unacked bytes.
+                *
+                * On AF_UNIX, all bytes are immediately acked!
+                */
+               if (rc == 0) {
+                       value_ptr = ((int *)va_arg(ap, int *));
+                       *value_ptr = 0;
+               }
+               break;
        }
 
        va_end(ap);