Merge branch 'master' into net-2.6.25
diff --git a/include/netinet/tcp.h b/include/netinet/tcp.h
new file mode 100644
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--- /dev/null
+++ b/include/netinet/tcp.h
@@ -0,0 +1,230 @@
+/*
+ * 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 */