--- HEAD/src/sys/netinet/tcp.h	2007-05-25 14:28:49.000000000 -0700
+++ p4/toestack/sys/netinet/tcp.h	2007-11-05 20:38:24.000000000 -0800
@@ -147,6 +147,10 @@
 #define TCP_NOOPT	0x08	/* don't use TCP options */
 #define TCP_MD5SIG	0x10	/* use MD5 digests (RFC2385) */
 #define	TCP_INFO	0x20	/* retrieve tcp_info structure */
+#define TCP_CONGESTION	0x40	/* congestion control algorithm */
+
+#define TCP_CA_NAME_MAX	16	/* max congestion control name len */
+
 
 #define	TCPI_OPT_TIMESTAMPS	0x01
 #define	TCPI_OPT_SACK		0x02