Merge branch 'master' into net-2.6.25

include/netinet/tcp.h

+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)tcp.h	8.1 (Berkeley) 6/10/93
+ */
+
+#ifndef _NETINET_TCP_H
+#define _NETINET_TCP_H	1
+
+#include <features.h>
+
+/*
+ * User-settable options (used with setsockopt).
+ */
+#define	TCP_NODELAY	 1	/* Don't delay send to coalesce packets  */
+#define	TCP_MAXSEG	 2	/* Set maximum segment size  */
+#define TCP_CORK	 3	/* Control sending of partial frames  */
+#define TCP_KEEPIDLE	 4	/* Start keeplives after this period */
+#define TCP_KEEPINTVL	 5	/* Interval between keepalives */
+#define TCP_KEEPCNT	 6	/* Number of keepalives before death */
+#define TCP_SYNCNT	 7	/* Number of SYN retransmits */
+#define TCP_LINGER2	 8	/* Life time of orphaned FIN-WAIT-2 state */
+#define TCP_DEFER_ACCEPT 9	/* Wake up listener only when data arrive */
+#define TCP_WINDOW_CLAMP 10	/* Bound advertised window */
+#define TCP_INFO	 11	/* Information about this connection. */
+#define	TCP_QUICKACK	 12	/* Bock/reenable quick ACKs.  */
+#define TCP_CONGESTION	 13	/* Congestion control algorithm.  */
+
+#ifdef __USE_MISC
+# include <sys/types.h>
+
+# ifdef __FAVOR_BSD
+typedef	u_int32_t tcp_seq;
+/*
+ * TCP header.
+ * Per RFC 793, September, 1981.
+ */
+struct tcphdr
+  {
+    u_int16_t th_sport;		/* source port */
+    u_int16_t th_dport;		/* destination port */
+    tcp_seq th_seq;		/* sequence number */
+    tcp_seq th_ack;		/* acknowledgement number */
+#  if __BYTE_ORDER == __LITTLE_ENDIAN
+    u_int8_t th_x2:4;		/* (unused) */
+    u_int8_t th_off:4;		/* data offset */
+#  endif
+#  if __BYTE_ORDER == __BIG_ENDIAN
+    u_int8_t th_off:4;		/* data offset */
+    u_int8_t th_x2:4;		/* (unused) */
+#  endif
+    u_int8_t th_flags;
+#  define TH_FIN	0x01
+#  define TH_SYN	0x02
+#  define TH_RST	0x04
+#  define TH_PUSH	0x08
+#  define TH_ACK	0x10
+#  define TH_URG	0x20
+    u_int16_t th_win;		/* window */
+    u_int16_t th_sum;		/* checksum */
+    u_int16_t th_urp;		/* urgent pointer */
+};
+
+# else /* !__FAVOR_BSD */
+struct tcphdr
+  {
+    u_int16_t source;
+    u_int16_t dest;
+    u_int32_t seq;
+    u_int32_t ack_seq;
+#  if __BYTE_ORDER == __LITTLE_ENDIAN
+    u_int16_t res1:4;
+    u_int16_t doff:4;
+    u_int16_t fin:1;
+    u_int16_t syn:1;
+    u_int16_t rst:1;
+    u_int16_t psh:1;
+    u_int16_t ack:1;
+    u_int16_t urg:1;
+    u_int16_t res2:2;
+#  elif __BYTE_ORDER == __BIG_ENDIAN
+    u_int16_t doff:4;
+    u_int16_t res1:4;
+    u_int16_t res2:2;
+    u_int16_t urg:1;
+    u_int16_t ack:1;
+    u_int16_t psh:1;
+    u_int16_t rst:1;
+    u_int16_t syn:1;
+    u_int16_t fin:1;
+#  else
+#   error "Adjust your <bits/endian.h> defines"
+#  endif
+    u_int16_t window;
+    u_int16_t check;
+    u_int16_t urg_ptr;
+};
+# endif /* __FAVOR_BSD */
+
+enum
+{
+  TCP_ESTABLISHED = 1,
+  TCP_SYN_SENT,
+  TCP_SYN_RECV,
+  TCP_FIN_WAIT1,
+  TCP_FIN_WAIT2,
+  TCP_TIME_WAIT,
+  TCP_CLOSE,
+  TCP_CLOSE_WAIT,
+  TCP_LAST_ACK,
+  TCP_LISTEN,
+  TCP_CLOSING   /* now a valid state */
+};
+
+# 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)
+
+/*
+ * Default maximum segment size for TCP.
+ * With an IP MSS of 576, this is 536,
+ * but 512 is probably more convenient.
+ * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
+ */
+# define TCP_MSS	512
+
+# define TCP_MAXWIN	65535	/* largest value for (unscaled) window */
+
+# define TCP_MAX_WINSHIFT	14	/* maximum window shift */
+
+# define SOL_TCP		6	/* TCP level */
+
+
+# define TCPI_OPT_TIMESTAMPS	1
+# define TCPI_OPT_SACK		2
+# define TCPI_OPT_WSCALE	4
+# define TCPI_OPT_ECN		8
+
+/* Values for tcpi_state.  */
+enum tcp_ca_state
+{
+  TCP_CA_Open = 0,
+  TCP_CA_Disorder = 1,
+  TCP_CA_CWR = 2,
+  TCP_CA_Recovery = 3,
+  TCP_CA_Loss = 4
+};
+
+struct tcp_info
+{
+  u_int8_t	tcpi_state;
+  u_int8_t	tcpi_ca_state;
+  u_int8_t	tcpi_retransmits;
+  u_int8_t	tcpi_probes;
+  u_int8_t	tcpi_backoff;
+  u_int8_t	tcpi_options;
+  u_int8_t	tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
+
+  u_int32_t	tcpi_rto;
+  u_int32_t	tcpi_ato;
+  u_int32_t	tcpi_snd_mss;
+  u_int32_t	tcpi_rcv_mss;
+
+  u_int32_t	tcpi_unacked;
+  u_int32_t	tcpi_sacked;
+  u_int32_t	tcpi_lost;
+  u_int32_t	tcpi_retrans;
+  u_int32_t	tcpi_fackets;
+
+  /* Times. */
+  u_int32_t	tcpi_last_data_sent;
+  u_int32_t	tcpi_last_ack_sent;	/* Not remembered, sorry.  */
+  u_int32_t	tcpi_last_data_recv;
+  u_int32_t	tcpi_last_ack_recv;
+
+  /* Metrics. */
+  u_int32_t	tcpi_pmtu;
+  u_int32_t	tcpi_rcv_ssthresh;
+  u_int32_t	tcpi_rtt;
+  u_int32_t	tcpi_rttvar;
+  u_int32_t	tcpi_snd_ssthresh;
+  u_int32_t	tcpi_snd_cwnd;
+  u_int32_t	tcpi_advmss;
+  u_int32_t	tcpi_reordering;
+  u_int32_t	tcpi_rcv_rtt;
+  u_int32_t	tcpi_rcv_space;
+  u_int32_t	tcpi_total_retrans;
+
+};
+
+#endif /* Misc.  */
+
+#endif /* netinet/tcp.h */