xnu-2782.40.9.tar.gz

[apple/xnu.git] / bsd / netinet / tcp.h

diff --git a/bsd/netinet/tcp.h b/bsd/netinet/tcp.h
index 99264dcbe717314ebe8e510beda4fcedecc265fa..c4ecae9d89c44dfa415998e05efcf465fa3391fa 100644 (file)
--- a/bsd/netinet/tcp.h
+++ b/bsd/netinet/tcp.h
@@ -1,8 +1,8 @@
 /*
 /*

- * Copyright (c) 2000-2011 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
  * @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
  * 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


@@ -11,10 +11,10 @@
  * 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.
  * 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.
  * 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
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,


@@ -22,7 +22,7 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
+ *

  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*


@@ -134,6 +134,9 @@ struct tcphdr {
     (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
 #define        TCPOPT_SIGNATURE                19      /* Keyed MD5: RFC 2385 */
 #define           TCPOLEN_SIGNATURE            18
     (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
 #define        TCPOPT_SIGNATURE                19      /* Keyed MD5: RFC 2385 */
 #define           TCPOLEN_SIGNATURE            18

+#if MPTCP
+#define        TCPOPT_MULTIPATH                30
+#endif

 
 /* Option definitions */
 #define TCPOPT_SACK_PERMIT_HDR \
 
 /* Option definitions */
 #define TCPOPT_SACK_PERMIT_HDR \


@@ -141,7 +144,14 @@ struct tcphdr {
 #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        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 */
+
+/*
+ * A SACK option that specifies n blocks will have a length of (8*n + 2)
+ * bytes, so the 40 bytes available for TCP options can specify a
+ * maximum of 4 blocks.
+ */
+
+#define        TCP_MAX_SACK    4       /* MAX # SACKs sent in any segment */

 
 
 /*
 
 
 /*


@@ -163,15 +173,6 @@ struct tcphdr {
  */
 #define        TCP_MINMSS 216
 
  */
 #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,
 /*
  * Default maximum segment size for TCP6.
  * With an IP6 MSS of 1280, this is 1220,


@@ -207,17 +208,37 @@ struct tcphdr {
 #define TCP_RXT_CONNDROPTIME   0x80    /* time after which tcp retransmissions will be 
                                         * stopped and the connection will be dropped
                                         */
 #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 
+#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.
                                         */
                                         * after retransmitting the FIN 3 times. It will
                                         * prevent holding too many mbufs in socket 
                                         * buffer queues.
                                         */

+#define        TCP_KEEPINTVL           0x101   /* interval between keepalives */
+#define        TCP_KEEPCNT             0x102   /* number of keepalives before close */
+#define        TCP_SENDMOREACKS        0x103   /* always ack every other packet */
+#define        TCP_ENABLE_ECN          0x104   /* Enable ECN on a connection */
+

 #ifdef PRIVATE
 #define        TCP_INFO                0x200   /* retrieve tcp_info structure */
 #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_SND_BW     0x202   /* Measure sender's bandwidth for this connection */

+#endif /* PRIVATE */
+
+
+#define        TCP_NOTSENT_LOWAT       0x201   /* Low water mark for TCP unsent data */
+
+#ifdef PRIVATE

 #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 */
 #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 */

+#define TCP_ADAPTIVE_READ_TIMEOUT      0x205   /* Read timeout used as a multiple of RTT */    
+/*
+ * Enable message delivery on a socket, this feature is currently unsupported and
+ * is subjected to change in future.
+ */
+#define        TCP_ENABLE_MSGS 0x206
+#define        TCP_ADAPTIVE_WRITE_TIMEOUT      0x207   /* Write timeout used as a multiple of RTT */
+#define        TCP_NOTIMEWAIT          0x208   /* Avoid going into time-wait */
+#define        TCP_DISABLE_BLACKHOLE_DETECTION 0x209   /* disable PMTU blackhole detection */
+

 /*
  * The TCP_INFO socket option is a private API and is subject to change
  */
 /*
  * The TCP_INFO socket option is a private API and is subject to change
  */


@@ -230,6 +251,10 @@ struct tcphdr {
 
 #define TCPI_FLAG_LOSSRECOVERY 0x01    /* Currently in loss recovery */
 
 
 #define TCPI_FLAG_LOSSRECOVERY 0x01    /* Currently in loss recovery */
 

+/*
+ * Add new fields to this structure at the end only. This will preserve
+ * binary compatibility.
+ */

 struct tcp_info {
        u_int8_t        tcpi_state;                     /* TCP FSM state. */
        u_int8_t        tcpi_options;           /* Options enabled on conn. */
 struct tcp_info {
        u_int8_t        tcpi_state;                     /* TCP FSM state. */
        u_int8_t        tcpi_options;           /* Options enabled on conn. */


@@ -245,6 +270,7 @@ struct tcp_info {
        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_rttcur;            /* Most recent value of RTT */
        u_int32_t       tcpi_srtt;                      /* Smoothed RTT */
        u_int32_t       tcpi_rttvar;            /* RTT variance */

+       u_int32_t       tcpi_rttbest;           /* Best RTT we've seen */

 
        u_int32_t       tcpi_snd_ssthresh;      /* Slow start threshold. */
        u_int32_t       tcpi_snd_cwnd;          /* Send congestion window. */
 
        u_int32_t       tcpi_snd_ssthresh;      /* Slow start threshold. */
        u_int32_t       tcpi_snd_cwnd;          /* Send congestion window. */


@@ -258,17 +284,36 @@ struct tcp_info {
        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 */
        
        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_txpackets __attribute__((aligned(8)));     /* total packets sent */

        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_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_rxpackets __attribute__((aligned(8)));     /* total packets received */

        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_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 */
+       u_int64_t       tcpi_rxoutoforderbytes __attribute__((aligned(8)));
+                                                                       /* total out of order bytes received */
+       u_int64_t       tcpi_snd_bw __attribute__((aligned(8)));        /* measured send bandwidth in bits/sec */
+       u_int8_t        tcpi_synrexmits;        /* Number of syn retransmits before connect */
+       u_int8_t        tcpi_unused1;
+       u_int16_t       tcpi_unused2;
+       u_int64_t       tcpi_cell_rxpackets __attribute((aligned(8)));  /* packets received over cellular */
+       u_int64_t       tcpi_cell_rxbytes __attribute((aligned(8)));    /* bytes received over cellular */
+       u_int64_t       tcpi_cell_txpackets __attribute((aligned(8)));  /* packets transmitted over cellular */
+       u_int64_t       tcpi_cell_txbytes __attribute((aligned(8)));    /* bytes transmitted over cellular */
+       u_int64_t       tcpi_wifi_rxpackets __attribute((aligned(8)));  /* packets received over Wi-Fi */
+       u_int64_t       tcpi_wifi_rxbytes __attribute((aligned(8)));    /* bytes received over Wi-Fi */
+       u_int64_t       tcpi_wifi_txpackets __attribute((aligned(8)));  /* packets transmitted over Wi-Fi */
+       u_int64_t       tcpi_wifi_txbytes __attribute((aligned(8)));    /* bytes transmitted over Wi-Fi */
+       u_int64_t       tcpi_wired_rxpackets __attribute((aligned(8))); /* packets received over Wired */
+       u_int64_t       tcpi_wired_rxbytes __attribute((aligned(8)));   /* bytes received over Wired */
+       u_int64_t       tcpi_wired_txpackets __attribute((aligned(8))); /* packets transmitted over Wired */
+       u_int64_t       tcpi_wired_txbytes __attribute((aligned(8)));   /* bytes transmitted over Wired */

 };
 
 struct tcp_measure_bw_burst {
 };
 
 struct tcp_measure_bw_burst {


@@ -301,6 +346,17 @@ struct info_tuple {
 #define itpl_remote_sin                itpl_remoteaddr._itpl_sin
 #define itpl_remote_sin6       itpl_remoteaddr._itpl_sin6
 
 #define itpl_remote_sin                itpl_remoteaddr._itpl_sin
 #define itpl_remote_sin6       itpl_remoteaddr._itpl_sin6
 

+/*
+ * TCP connection info auxiliary data (CIAUX_TCP)
+ *
+ * Do not add new fields to this structure, just add them to tcp_info 
+ * structure towards the end. This will preserve binary compatibility.
+ */
+typedef struct conninfo_tcp {
+       pid_t                   tcpci_peer_pid; /* loopback peer PID if > 0 */
+       struct tcp_info         tcpci_tcp_info; /* TCP info */
+} conninfo_tcp_t;
+

 #pragma pack()
 
 #endif /* PRIVATE */
 #pragma pack()
 
 #endif /* PRIVATE */