xnu-2050.18.24.tar.gz

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

diff --git a/bsd/netinet/tcp.h b/bsd/netinet/tcp.h
index a3a183bfe15034336639ea980bbd6093ec886c68..99264dcbe717314ebe8e510beda4fcedecc265fa 100644 (file)
--- a/bsd/netinet/tcp.h
+++ b/bsd/netinet/tcp.h
@@ -213,19 +213,13 @@ struct tcphdr {
                                         * buffer queues.
                                         */
 #ifdef PRIVATE
-#define        TCP_INFO                                0x200   /* retrieve tcp_info structure */
-
+#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 comes from the Linux 2.6 TCP API, and permits
- * the caller to query certain information about the state of a TCP
- * connection.  We provide an overlapping set of fields with the Linux
- * implementation, but since this is a fixed size structure, room has been
- * left for growth.  In order to maximize potential future compatibility with
- * the Linux API, the same variable names and order have been adopted, and
- * padding left to make room for omitted fields in case they are added later.
- *
- * XXX: This is currently an unstable ABI/API, in that it is expected to
- * change.
+ * The TCP_INFO socket option is a private API and is subject to change
  */
 #pragma pack(4)
 
@@ -234,26 +228,52 @@ struct tcphdr {
 #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_bwnd;          /* Bandwidth 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 */
 };
 
 /*