xnu-1699.22.73.tar.gz

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

diff --git a/bsd/netinet/tcp.h b/bsd/netinet/tcp.h
index 3b4d8f92fcb70b41aeb2c4018a9b5043a3965e2c..a3a183bfe15034336639ea980bbd6093ec886c68 100644 (file)
--- a/bsd/netinet/tcp.h
+++ b/bsd/netinet/tcp.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -185,8 +185,6 @@ struct tcphdr {
 
 #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 */
@@ -202,6 +200,90 @@ struct tcphdr {
 #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 */
+
+/*
+ * 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.
+ */
+#pragma pack(4)
+
+#define        TCPI_OPT_TIMESTAMPS     0x01
+#define        TCPI_OPT_SACK           0x02
+#define        TCPI_OPT_WSCALE         0x04
+#define        TCPI_OPT_ECN            0x08
+
+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_snd_mss;           /* Max segment size for send. */
+       u_int32_t       tcpi_rcv_mss;           /* Max segment size for receive. */
+
+       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 */
+};
+
+/*
+ * 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