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[apple/xnu.git] / bsd / netinet / tcp_fsm.h
index 6bbb4149036e69f72853f2c6e58a91dfd1568034..dab26297244d66a9cb1fa0656f674422738a2988 100644 (file)
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @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. 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
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ * 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@
  */
 /*
  * Copyright (c) 1982, 1986, 1993
  * Per RFC793, September, 1981.
  */
 
-#define        TCP_NSTATES     11
+#define TCP_NSTATES     11
 
-#define        TCPS_CLOSED             0       /* closed */
-#define        TCPS_LISTEN             1       /* listening for connection */
-#define        TCPS_SYN_SENT           2       /* active, have sent syn */
-#define        TCPS_SYN_RECEIVED       3       /* have send and received syn */
+#define TCPS_CLOSED             0       /* closed */
+#define TCPS_LISTEN             1       /* listening for connection */
+#define TCPS_SYN_SENT           2       /* active, have sent syn */
+#define TCPS_SYN_RECEIVED       3       /* have send and received syn */
 /* states < TCPS_ESTABLISHED are those where connections not established */
-#define        TCPS_ESTABLISHED        4       /* established */
-#define        TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
+#define TCPS_ESTABLISHED        4       /* established */
+#define TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
 /* states > TCPS_CLOSE_WAIT are those where user has closed */
-#define        TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
-#define        TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
-#define        TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
+#define TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
+#define TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
+#define TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
-#define        TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
-#define        TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
+#define TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
+#define TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
 
 /* for KAME src sync over BSD*'s */
-#define        TCP6_NSTATES            TCP_NSTATES
-#define        TCP6S_CLOSED            TCPS_CLOSED
-#define        TCP6S_LISTEN            TCPS_LISTEN
-#define        TCP6S_SYN_SENT          TCPS_SYN_SENT
-#define        TCP6S_SYN_RECEIVED      TCPS_SYN_RECEIVED
-#define        TCP6S_ESTABLISHED       TCPS_ESTABLISHED
-#define        TCP6S_CLOSE_WAIT        TCPS_CLOSE_WAIT
-#define        TCP6S_FIN_WAIT_1        TCPS_FIN_WAIT_1
-#define        TCP6S_CLOSING           TCPS_CLOSING
-#define        TCP6S_LAST_ACK          TCPS_LAST_ACK
-#define        TCP6S_FIN_WAIT_2        TCPS_FIN_WAIT_2
-#define        TCP6S_TIME_WAIT         TCPS_TIME_WAIT
+#define TCP6_NSTATES            TCP_NSTATES
+#define TCP6S_CLOSED            TCPS_CLOSED
+#define TCP6S_LISTEN            TCPS_LISTEN
+#define TCP6S_SYN_SENT          TCPS_SYN_SENT
+#define TCP6S_SYN_RECEIVED      TCPS_SYN_RECEIVED
+#define TCP6S_ESTABLISHED       TCPS_ESTABLISHED
+#define TCP6S_CLOSE_WAIT        TCPS_CLOSE_WAIT
+#define TCP6S_FIN_WAIT_1        TCPS_FIN_WAIT_1
+#define TCP6S_CLOSING           TCPS_CLOSING
+#define TCP6S_LAST_ACK          TCPS_LAST_ACK
+#define TCP6S_FIN_WAIT_2        TCPS_FIN_WAIT_2
+#define TCP6S_TIME_WAIT         TCPS_TIME_WAIT
 
-#define        TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
-#define        TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
-#define        TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
+#define TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
+#define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
+#define TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
+#define TCPS_HAVERCVDFIN2(s)    ((s) == TCPS_CLOSE_WAIT ||                      \
+                                (s) == TCPS_CLOSING ||                         \
+                                (s) == TCPS_LAST_ACK ||                        \
+                                (s) == TCPS_TIME_WAIT)
 
 #ifdef KERNEL_PRIVATE
-#ifdef TCPOUTFLAGS
+#ifdef  TCPOUTFLAGS
 /*
  * Flags used when sending segments in tcp_output.
  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
  * determined by state, with the proviso that TH_FIN is sent only
  * if all data queued for output is included in the segment.
  */
-static u_char  tcp_outflags[TCP_NSTATES] = {
-       TH_RST|TH_ACK,          /* 0, CLOSED */
-       0,                      /* 1, LISTEN */
-       TH_SYN,                 /* 2, SYN_SENT */
-       TH_SYN|TH_ACK,          /* 3, SYN_RECEIVED */
-       TH_ACK,                 /* 4, ESTABLISHED */
-       TH_ACK,                 /* 5, CLOSE_WAIT */
-       TH_FIN|TH_ACK,          /* 6, FIN_WAIT_1 */
-       TH_FIN|TH_ACK,          /* 7, CLOSING */
-       TH_FIN|TH_ACK,          /* 8, LAST_ACK */
-       TH_ACK,                 /* 9, FIN_WAIT_2 */
-       TH_ACK,                 /* 10, TIME_WAIT */
-};     
+static u_char   tcp_outflags[TCP_NSTATES] = {
+       TH_RST | TH_ACK,          /* 0, CLOSED */
+       0,                      /* 1, LISTEN */
+       TH_SYN,                 /* 2, SYN_SENT */
+       TH_SYN | TH_ACK,          /* 3, SYN_RECEIVED */
+       TH_ACK,                 /* 4, ESTABLISHED */
+       TH_ACK,                 /* 5, CLOSE_WAIT */
+       TH_FIN | TH_ACK,          /* 6, FIN_WAIT_1 */
+       TH_FIN | TH_ACK,          /* 7, CLOSING */
+       TH_FIN | TH_ACK,          /* 8, LAST_ACK */
+       TH_ACK,                 /* 9, FIN_WAIT_2 */
+       TH_ACK,                 /* 10, TIME_WAIT */
+};
 #endif
-#endif KERNEL_PRIVATE
+#endif /* KERNEL_PRIVATE */
 
 #if KPROF
 #ifdef KERNEL_PRIVATE
-int    tcp_acounts[TCP_NSTATES][PRU_NREQ];
-#endif KERNEL_PRIVATE
+int     tcp_acounts[TCP_NSTATES][PRU_NREQ];
+#endif /* KERNEL_PRIVATE */
 #endif
 
-#ifdef TCPSTATES
+#ifdef  TCPSTATES
 char *tcpstates[] = {
-       "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
-       "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
-       "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT"
+       "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
+       "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
+       "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT"
 };
 #endif