bug: don't soisdisconnected on datagram sockets, want to reconnect

[unix-history] / usr / src / sys / netinet / tcp.h

diff --git a/usr/src/sys/netinet/tcp.h b/usr/src/sys/netinet/tcp.h
index 4432b03..53731c8 100644 (file)
--- a/usr/src/sys/netinet/tcp.h
+++ b/usr/src/sys/netinet/tcp.h
@@ -1,4 +1,10 @@
-/* tcp.h 1.21 82/01/18 */
+/*
+ * Copyright (c) 1982 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ *     @(#)tcp.h       6.5 (Berkeley) %G%
+ */

 
 typedef        u_long  tcp_seq;
 /*
 
 typedef        u_long  tcp_seq;
 /*


@@ -10,9 +16,10 @@ struct tcphdr {
        u_short th_dport;               /* destination port */
        tcp_seq th_seq;                 /* sequence number */
        tcp_seq th_ack;                 /* acknowledgement number */
        u_short th_dport;               /* destination port */
        tcp_seq th_seq;                 /* sequence number */
        tcp_seq th_ack;                 /* acknowledgement number */

-       u_char
-               th_x2:4,                /* (unused) */
+#ifdef vax
+       u_char  th_x2:4,                /* (unused) */

                th_off:4;               /* data offset */
                th_off:4;               /* data offset */

+#endif

        u_char  th_flags;
 #define        TH_FIN  0x01
 #define        TH_SYN  0x02
        u_char  th_flags;
 #define        TH_FIN  0x01
 #define        TH_SYN  0x02


@@ -29,15 +36,19 @@ struct tcphdr {
 #define        TCPOPT_NOP      1
 #define        TCPOPT_MAXSEG   2
 
 #define        TCPOPT_NOP      1
 #define        TCPOPT_MAXSEG   2
 

-#ifdef TCPTRUEOOB

 /*
 /*

- * True out-of-band as value added option.
- * Advertise willingness with TCPOPT_WILOOB in
- * initial segment.  If peer is willing, will receive
- * such also.  Then can send TCPOPT_OOBDATA whenever oob data
- * exists; peer should ack with TCPOPT_OOBACK in segment.
+ * Default maximum segment size for TCP.
+ * With an IP MSS of 576, this is 536,
+ * but 512 is probably more convenient.

  */
  */

-#define        TCPOPT_WILLOOB  64              /* bytes: 64, 2 */
-#define        TCPOPT_OOBDATA  65              /* bytes: 65, 8, seq#, data, markseq */
-#define        TCPOPT_OOBACK   66              /* bytes: 66, 3, ack# */
+#ifdef lint
+#define        TCP_MSS 536
+#else
+#define        TCP_MSS MIN(512, IP_MSS - sizeof (struct tcpiphdr))

 #endif
 #endif

+
+/*
+ * 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 */