/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1982, 1986, 1993
#ifndef _NETINET_TCP_H_
#define _NETINET_TCP_H_
#include <sys/appleapiopts.h>
+#include <sys/_types.h>
+#include <machine/endian.h>
-typedef u_int32_t tcp_seq;
-typedef u_int32_t tcp_cc; /* connection count per rfc1644 */
+#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
+typedef __uint32_t tcp_seq;
+typedef __uint32_t tcp_cc; /* connection count per rfc1644 */
#define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */
#define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */
* Per RFC 793, September, 1981.
*/
struct tcphdr {
- u_short th_sport; /* source port */
- u_short th_dport; /* destination port */
+ unsigned short th_sport; /* source port */
+ unsigned short th_dport; /* destination port */
tcp_seq th_seq; /* sequence number */
tcp_seq th_ack; /* acknowledgement number */
-#if BYTE_ORDER == LITTLE_ENDIAN
- u_int th_x2:4, /* (unused) */
- th_off:4; /* data offset */
+#if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
+ unsigned int th_x2:4, /* (unused) */
+ th_off:4; /* data offset */
#endif
-#if BYTE_ORDER == BIG_ENDIAN
- u_int th_off:4, /* data offset */
- th_x2:4; /* (unused) */
+#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
+ unsigned int th_off:4, /* data offset */
+ th_x2:4; /* (unused) */
#endif
- u_char th_flags;
+ unsigned char th_flags;
#define TH_FIN 0x01
#define TH_SYN 0x02
#define TH_RST 0x04
#define TH_CWR 0x80
#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR)
- u_short th_win; /* window */
- u_short th_sum; /* checksum */
- u_short th_urp; /* urgent pointer */
+ unsigned short th_win; /* window */
+ unsigned short th_sum; /* checksum */
+ unsigned short th_urp; /* urgent pointer */
};
#define TCPOPT_EOL 0
#define TCPOPT_NOP 1
#define TCPOPT_MAXSEG 2
-#define TCPOLEN_MAXSEG 4
+#define TCPOLEN_MAXSEG 4
#define TCPOPT_WINDOW 3
-#define TCPOLEN_WINDOW 3
+#define TCPOLEN_WINDOW 3
#define TCPOPT_SACK_PERMITTED 4 /* Experimental */
-#define TCPOLEN_SACK_PERMITTED 2
+#define TCPOLEN_SACK_PERMITTED 2
#define TCPOPT_SACK 5 /* Experimental */
+#define TCPOLEN_SACK 8 /* len of sack block */
#define TCPOPT_TIMESTAMP 8
-#define TCPOLEN_TIMESTAMP 10
-#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
-#define TCPOPT_TSTAMP_HDR \
+#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)
+#define MAX_TCPOPTLEN 40 /* Absolute maximum TCP options len */
+
#define TCPOPT_CC 11 /* CC options: RFC-1644 */
#define TCPOPT_CCNEW 12
#define TCPOPT_CCECHO 13
#define TCPOLEN_CC_APPA (TCPOLEN_CC+2)
#define TCPOPT_CC_HDR(ccopt) \
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
+#define TCPOPT_SIGNATURE 19 /* Keyed MD5: RFC 2385 */
+#define TCPOLEN_SIGNATURE 18
+
+/* Option definitions */
+#define TCPOPT_SACK_PERMIT_HDR \
+(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK_PERMITTED<<8|TCPOLEN_SACK_PERMITTED)
+#define TCPOPT_SACK_HDR (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK<<8)
+/* Miscellaneous constants */
+#define MAX_SACK_BLKS 6 /* Max # SACK blocks stored at sender side */
+#define TCP_MAX_SACK 3 /* MAX # SACKs sent in any segment */
+
/*
* Default maximum segment size for TCP.
- * With an IP MSS of 576, this is 536,
+ * With an IP MTU 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
+/*
+ * TCP_MINMSS is defined to be 216 which is fine for the smallest
+ * link MTU (256 bytes, SLIP interface) in the Internet.
+ * However it is very unlikely to come across such low MTU interfaces
+ * these days (anno dato 2004).
+ * Probably it can be set to 512 without ill effects. But we play safe.
+ * See tcp_subr.c tcp_minmss SYSCTL declaration for more comments.
+ * Setting this to "0" disables the minmss check.
+ */
+#define TCP_MINMSS 216
+
+/*
+ * TCP_MINMSSOVERLOAD is defined to be 1000 which should cover any type
+ * of interactive TCP session.
+ * See tcp_subr.c tcp_minmssoverload SYSCTL declaration and tcp_input.c
+ * for more comments.
+ * Setting this to "0" disables the minmssoverload check.
+ */
+#define TCP_MINMSSOVERLOAD 1000
+
/*
* Default maximum segment size for TCP6.
* With an IP6 MSS of 1280, this is 1220,
#define TCP_MAX_WINSHIFT 14 /* maximum window shift */
-#define TCP_MAXBURST 4 /* maximum segments in a burst */
-
#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */
#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))
/* max space left for options */
+#endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
/*
* User-settable options (used with setsockopt).
*/
-#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
-#define TCP_MAXSEG 0x02 /* set maximum segment size */
-#define TCP_NOPUSH 0x04 /* don't push last block of write */
-#define TCP_NOOPT 0x08 /* don't use TCP options */
+#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
+#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
+#define TCP_MAXSEG 0x02 /* set maximum segment size */
+#define TCP_NOPUSH 0x04 /* don't push last block of write */
+#define TCP_NOOPT 0x08 /* don't use TCP options */
+#define TCP_KEEPALIVE 0x10 /* idle time used when SO_KEEPALIVE is enabled */
+#define TCP_CONNECTIONTIMEOUT 0x20 /* connection timeout */
+#define PERSIST_TIMEOUT 0x40 /* time after which a connection in
+ * persist timeout will terminate.
+ * see draft-ananth-tcpm-persist-02.txt
+ */
+#define TCP_RXT_CONNDROPTIME 0x80 /* time after which tcp retransmissions will be
+ * stopped and the connection will be dropped
+ */
+#define TCP_RXT_FINDROP 0x100 /* when this option is set, drop a connection
+ * after retransmitting the FIN 3 times. It will
+ * prevent holding too many mbufs in socket
+ * buffer queues.
+ */
+#ifdef PRIVATE
+#define TCP_INFO 0x200 /* retrieve tcp_info structure */
+#define TCP_NOTSENT_LOWAT 0x201 /* Low water mark for TCP unsent data */
+#define TCP_MEASURE_SND_BW 0x202 /* Measure sender's bandwidth for this connection */
+#define TCP_MEASURE_BW_BURST 0x203 /* Burst size to use for bandwidth measurement */
+#define TCP_PEER_PID 0x204 /* Lookup pid of the process we're connected to */
+/*
+ * The TCP_INFO socket option is a private API and is subject to change
+ */
+#pragma pack(4)
+
+#define TCPI_OPT_TIMESTAMPS 0x01
+#define TCPI_OPT_SACK 0x02
+#define TCPI_OPT_WSCALE 0x04
+#define TCPI_OPT_ECN 0x08
+
+#define TCPI_FLAG_LOSSRECOVERY 0x01 /* Currently in loss recovery */
+
+struct tcp_info {
+ u_int8_t tcpi_state; /* TCP FSM state. */
+ u_int8_t tcpi_options; /* Options enabled on conn. */
+ u_int8_t tcpi_snd_wscale; /* RFC1323 send shift value. */
+ u_int8_t tcpi_rcv_wscale; /* RFC1323 recv shift value. */
+
+ u_int32_t tcpi_flags; /* extra flags (TCPI_FLAG_xxx) */
+
+ u_int32_t tcpi_rto; /* Retransmission timeout in milliseconds */
+ u_int32_t tcpi_snd_mss; /* Max segment size for send. */
+ u_int32_t tcpi_rcv_mss; /* Max segment size for receive. */
+
+ u_int32_t tcpi_rttcur; /* Most recent value of RTT */
+ u_int32_t tcpi_srtt; /* Smoothed RTT */
+ u_int32_t tcpi_rttvar; /* RTT variance */
+
+ u_int32_t tcpi_snd_ssthresh; /* Slow start threshold. */
+ u_int32_t tcpi_snd_cwnd; /* Send congestion window. */
+
+ u_int32_t tcpi_rcv_space; /* Advertised recv window. */
+
+ u_int32_t tcpi_snd_wnd; /* Advertised send window. */
+ u_int32_t tcpi_snd_nxt; /* Next egress seqno */
+ u_int32_t tcpi_rcv_nxt; /* Next ingress seqno */
+
+ int32_t tcpi_last_outif; /* if_index of interface used to send last */
+ u_int32_t tcpi_snd_sbbytes; /* bytes in snd buffer including data inflight */
+
+ u_int64_t tcpi_txbytes __attribute__((aligned(8)));
+ /* total bytes sent */
+ u_int64_t tcpi_txretransmitbytes __attribute__((aligned(8)));
+ /* total bytes retransmitted */
+ u_int64_t tcpi_txunacked __attribute__((aligned(8)));
+ /* current number of bytes not acknowledged */
+ u_int64_t tcpi_rxbytes __attribute__((aligned(8)));
+ /* total bytes received */
+ u_int64_t tcpi_rxduplicatebytes __attribute__((aligned(8)));
+ /* total duplicate bytes received */
+ u_int64_t tcpi_snd_bw __attribute__((aligned(8))); /* measured send bandwidth in bits/sec */
+};
+
+struct tcp_measure_bw_burst {
+ u_int32_t min_burst_size; /* Minimum number of packets to use */
+ u_int32_t max_burst_size; /* Maximum number of packets to use */
+};
+
+/*
+ * Note that IPv6 link local addresses should have the appropriate scope ID
+ */
+
+struct info_tuple {
+ u_int8_t itpl_proto;
+ union {
+ struct sockaddr _itpl_sa;
+ struct sockaddr_in _itpl_sin;
+ struct sockaddr_in6 _itpl_sin6;
+ } itpl_localaddr;
+ union {
+ struct sockaddr _itpl_sa;
+ struct sockaddr_in _itpl_sin;
+ struct sockaddr_in6 _itpl_sin6;
+ } itpl_remoteaddr;
+};
+
+#define itpl_local_sa itpl_localaddr._itpl_sa
+#define itpl_local_sin itpl_localaddr._itpl_sin
+#define itpl_local_sin6 itpl_localaddr._itpl_sin6
+#define itpl_remote_sa itpl_remoteaddr._itpl_sa
+#define itpl_remote_sin itpl_remoteaddr._itpl_sin
+#define itpl_remote_sin6 itpl_remoteaddr._itpl_sin6
+
+#pragma pack()
+
+#endif /* PRIVATE */
+#endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
#endif
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