[tcp] Use correct length for memset()

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/net/tcp.c b/src/net/tcp.c
index 37a202ef1309534049720a65b6de760fbf9fb591..cb3b84edd8c62fe1a8af58b0fa619b398a9362e5 100644 (file)
--- a/src/net/tcp.c
+++ b/src/net/tcp.c
@@ -697,7 +697,7 @@ static void tcp_xmit_sack ( struct tcp_connection *tcp, uint32_t sack_seq ) {
                wsopt->wsopt.length = sizeof ( wsopt->wsopt );
                wsopt->wsopt.scale = TCP_RX_WINDOW_SCALE;
                spopt = iob_push ( iobuf, sizeof ( *spopt ) );
-               memset ( spopt->nop, TCP_OPTION_NOP, sizeof ( spopt ) );
+               memset ( spopt->nop, TCP_OPTION_NOP, sizeof ( spopt->nop ) );
                spopt->spopt.kind = TCP_OPTION_SACK_PERMITTED;
                spopt->spopt.length = sizeof ( spopt->spopt );
        }