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Diffstat (limited to 'slirp')
-rw-r--r--slirp/tcp.h13
1 files changed, 8 insertions, 5 deletions
diff --git a/slirp/tcp.h b/slirp/tcp.h
index 82996031e0..2e2b4033a6 100644
--- a/slirp/tcp.h
+++ b/slirp/tcp.h
@@ -79,20 +79,23 @@ struct tcphdr {
#define TCPOPT_EOL 0
#define TCPOPT_NOP 1
#define TCPOPT_MAXSEG 2
-#define TCPOLEN_MAXSEG 4
#define TCPOPT_WINDOW 3
-#define TCPOLEN_WINDOW 3
#define TCPOPT_SACK_PERMITTED 4 /* Experimental */
-#define TCPOLEN_SACK_PERMITTED 2
#define TCPOPT_SACK 5 /* Experimental */
#define TCPOPT_TIMESTAMP 8
-#define TCPOLEN_TIMESTAMP 10
-#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
#define TCPOPT_TSTAMP_HDR \
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
#endif
+#ifndef TCPOLEN_MAXSEG
+#define TCPOLEN_MAXSEG 4
+#define TCPOLEN_WINDOW 3
+#define TCPOLEN_SACK_PERMITTED 2
+#define TCPOLEN_TIMESTAMP 10
+#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
+#endif
+
/*
* Default maximum segment size for TCP.
* With an IP MSS of 576, this is 536,