[313] | 1 | /*
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| 2 | * TINET (TCP/IP Protocol Stack)
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| 3 | *
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| 4 | * Copyright (C) 2001-2017 by Dep. of Computer Science and Engineering
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| 5 | * Tomakomai National College of Technology, JAPAN
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| 6 | *
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| 7 | * ä¸è¨èä½æ¨©è
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| 8 | ã¯ï¼ä»¥ä¸ã® (1)ï½(4) ã®æ¡ä»¶ãï¼Free Software Foundation
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| 9 | * ã«ãã£ã¦å
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| 10 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
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| 11 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
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| 12 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
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| 13 | å¸ï¼ä»¥ä¸ï¼
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| 14 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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| 15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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| 16 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
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| 17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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| 18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 19 | * ç¨ã§ããå½¢ã§åé
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| 20 | å¸ããå ´åã«ã¯ï¼åé
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| 21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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| 22 | * è
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| 23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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| 24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 26 | * ç¨ã§ããªãå½¢ã§åé
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| 27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®æ¡ä»¶ãæºãããã¨ï¼
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| 28 | * (a) åé
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| 29 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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| 30 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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| 31 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 32 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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| 33 | * 害ãããï¼ä¸è¨èä½æ¨©è
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| 34 | ããã³TOPPERSããã¸ã§ã¯ããå
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| 35 | 責ãããã¨ï¼
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| 36 | *
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| 37 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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| 38 | ã
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| 39 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
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| 40 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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| 41 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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| 42 | *
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| 43 | * @(#) $Id: tcp_subr.c 313 2017-07-23 04:50:32Z coas-nagasima $
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| 44 | */
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| 45 |
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| 46 | /*
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| 47 | * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
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| 48 | * The Regents of the University of California. All rights reserved.
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| 49 | *
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| 50 | * Redistribution and use in source and binary forms, with or without
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| 51 | * modification, are permitted provided that the following conditions
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| 52 | * are met:
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| 53 | * 1. Redistributions of source code must retain the above copyright
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| 54 | * notice, this list of conditions and the following disclaimer.
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| 55 | * 2. Redistributions in binary form must reproduce the above copyright
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| 56 | * notice, this list of conditions and the following disclaimer in the
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| 57 | * documentation and/or other materials provided with the distribution.
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| 58 | * 3. All advertising materials mentioning features or use of this software
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| 59 | * must display the following acknowledgement:
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| 60 | * This product includes software developed by the University of
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| 61 | * California, Berkeley and its contributors.
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| 62 | * 4. Neither the name of the University nor the names of its contributors
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| 63 | * may be used to endorse or promote products derived from this software
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| 64 | * without specific prior written permission.
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| 65 | *
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| 66 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 67 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 68 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 69 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 70 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 71 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 72 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 73 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 74 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 75 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 76 | * SUCH DAMAGE.
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| 77 | *
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| 78 | * @(#)tcp_subr.c 8.2 (Berkeley) 5/24/95
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| 79 | * $FreeBSD: src/sys/netinet/tcp_subr.c,v 1.49.2.4 1999/08/29 16:29:55 peter Exp $
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| 80 | */
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| 81 |
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| 82 | #include <stdarg.h>
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| 83 | #include <string.h>
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| 84 |
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| 85 | #ifdef TARGET_KERNEL_ASP
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| 86 |
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| 87 | #include <kernel.h>
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| 88 | #include <sil.h>
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| 89 | #include <syssvc/serial.h>
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| 90 | #include <syssvc/logtask.h>
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| 91 | #include <t_syslog.h>
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| 92 | #include "kernel_cfg.h"
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| 93 |
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| 94 | #endif /* of #ifdef TARGET_KERNEL_ASP */
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| 95 |
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| 96 | #ifdef TARGET_KERNEL_JSP
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| 97 |
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| 98 | #include <s_services.h>
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| 99 | #include <t_services.h>
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| 100 | #include "kernel_id.h"
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| 101 |
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| 102 | #endif /* of #ifdef TARGET_KERNEL_JSP */
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| 103 |
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| 104 | #include <tinet_defs.h>
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| 105 | #include <tinet_config.h>
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| 106 |
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| 107 | #include <net/if.h>
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| 108 | #include <net/if_ppp.h>
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| 109 | #include <net/if_loop.h>
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| 110 | #include <net/ethernet.h>
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| 111 | #include <net/net.h>
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| 112 | #include <net/net_endian.h>
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| 113 | #include <net/net_var.h>
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| 114 | #include <net/net_buf.h>
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| 115 | #include <net/net_timer.h>
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| 116 | #include <net/net_count.h>
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| 117 |
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| 118 | #include <netinet/in.h>
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| 119 | #include <netinet/in_var.h>
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| 120 | #include <netinet/in_itron.h>
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| 121 | #include <netinet/ip.h>
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| 122 | #include <netinet/ip_var.h>
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| 123 | #include <netinet/tcp.h>
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| 124 | #include <netinet/tcp_var.h>
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| 125 | #include <netinet/tcp_fsm.h>
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| 126 | #include <netinet/tcp_seq.h>
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| 127 | #include <netinet/tcp_timer.h>
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| 128 |
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| 129 | #ifdef SUPPORT_TCP
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| 130 |
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| 131 | /*
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| 132 | * å
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| 133 | ¨åå¤æ°
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| 134 | */
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| 135 |
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| 136 | /*
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| 137 | * TCP ã® SEQ ã®åæå¤ãããã°ã©ã ãèµ·åãã¦ãæåã« TCP ã»ã°ã¡ã³ãã
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| 138 | * éåä¿¡ããã¨ãã«ãget_tim() ã«ããåæåããã
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| 139 | */
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| 140 | T_TCP_SEQ tcp_iss = 0;
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| 141 |
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| 142 | #ifdef SUPPORT_MIB
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| 143 |
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| 144 | /*
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| 145 | * SNMP 㮠管çæ
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| 146 | å ±ãã¼ã¹ (MIB)
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| 147 | */
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| 148 |
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| 149 | T_TCP_STATS tcp_stats;
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| 150 |
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| 151 | #endif /* of #ifdef SUPPORT_MIB */
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| 152 |
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| 153 | /*
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| 154 | * å±æå¤æ°
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| 155 | */
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| 156 |
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| 157 | static uint16_t tcp_port_auto = TCP_PORT_FIRST_AUTO; /* èªåå²ãå½ã¦çªå· */
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| 158 |
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| 159 | #if defined(NUM_TCP_TW_CEP_ENTRY) && NUM_TCP_TW_CEP_ENTRY > 0
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| 160 |
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| 161 | /*
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| 162 | * ã¿ã¹ã¯ããã® Time Wait ç¶æ
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| 163 | CEP åé¢æ©è½
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| 164 | */
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| 165 |
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| 166 | /*
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| 167 | * å¤æ°
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| 168 | */
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| 169 |
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| 170 | T_TCP_TWCEP tcp_twcep[NUM_TCP_TW_CEP_ENTRY];
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| 171 |
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| 172 | /*
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| 173 | * tcp_move_twcep -- å¿
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| 174 | è¦ãªæ
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| 175 | å ±ã Time Wait ç¨ TCP é信端ç¹ã«ç§»ãã¦ã
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| 176 | * æ¨æºã® TCP é信端ç¹ãéæ¾ããã
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| 177 | */
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| 178 |
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| 179 | void
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| 180 | tcp_move_twcep (T_TCP_CEP *cep)
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| 181 | {
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| 182 | T_TCP_TWCEP* twcep;
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| 183 |
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| 184 | /* 空ãã® Time Wait ç¨ TCP é信端ç¹ãæ¢ç´¢ããã*/
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| 185 | for (twcep = &tcp_twcep[NUM_TCP_TW_CEP_ENTRY]; twcep -- != tcp_twcep; ) {
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| 186 | if (twcep->fsm_state != TCP_FSM_TIME_WAIT) {
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| 187 |
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| 188 | /*
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| 189 | * é信端ç¹ãããã¯ãã
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| 190 | * å¿
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| 191 | è¦ãªæ
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| 192 | å ±ã Time Wait ç¨ TCP é信端ç¹ã«ç§»ãã
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| 193 | */
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| 194 | syscall(wai_sem(cep->semid_lock));
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| 195 | twcep->flags = (uint8_t)cep->flags;
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| 196 | twcep->rbufsz = cep->rbufsz;
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| 197 | twcep->dstaddr = cep->dstaddr;
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| 198 | twcep->myaddr = cep->myaddr;
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| 199 | twcep->snd_una = cep->snd_una;
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| 200 | twcep->rcv_nxt = cep->rcv_nxt;
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| 201 | twcep->rwbuf_count = cep->rwbuf_count;
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| 202 | twcep->fsm_state = cep->fsm_state;
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| 203 | twcep->timer_2msl = cep->timer[TCP_TIM_2MSL];
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| 204 |
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| 205 | /* é信端ç¹ãããã¯ã解é¤ããã*/
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| 206 | syscall(sig_sem(cep->semid_lock));
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| 207 |
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| 208 | /* æ¨æº TCP é信端ç¹ãéæ¾ããã*/
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| 209 | tcp_close(cep);
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| 210 |
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| 211 | break;
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| 212 | }
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| 213 | }
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| 214 | }
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| 215 |
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| 216 | /*
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| 217 | * tcp_find_twcep -- ãã¼ãçªå·ãã Time Wait ç¨ TCP é信端ç¹ãå¾ãã
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| 218 | */
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| 219 |
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| 220 | T_TCP_TWCEP*
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| 221 | tcp_find_twcep (T_NET_BUF *input, uint_t off)
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| 222 | {
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| 223 | T_TCP_TWCEP* twcep;
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| 224 | T_TCP_HDR *tcph;
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| 225 |
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| 226 | tcph = GET_TCP_HDR(input, off);
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| 227 |
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| 228 | /*
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| 229 | * ç¶æ
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| 230 | ã TIME WAIT ã§ã
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| 231 | * IP ã¢ãã¬ã¹ã¨ãã¼ãçªå·ãä¸è´ããé信端ç¹ãæ¢ç´¢ããã
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| 232 | */
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| 233 | for (twcep = &tcp_twcep[NUM_TCP_TW_CEP_ENTRY]; twcep -- != tcp_twcep; ) {
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| 234 | if (twcep->fsm_state == TCP_FSM_TIME_WAIT &&
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| 235 | IN_IS_DSTADDR_ACCEPT (&twcep->myaddr.ipaddr, input) &&
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| 236 | IN_ARE_NET_SRCADDR_EQUAL(&twcep->dstaddr.ipaddr, input) &&
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| 237 | tcph->dport == twcep->myaddr.portno &&
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| 238 | tcph->sport == twcep->dstaddr.portno)
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| 239 | return twcep;
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| 240 | }
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| 241 |
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| 242 | return NULL;
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| 243 | }
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| 244 |
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| 245 | #endif /* of #if defined(NUM_TCP_TW_CEP_ENTRY) && NUM_TCP_TW_CEP_ENTRY > 0 */
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| 246 |
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| 247 | /*
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| 248 | * tcp_find_cep -- ãã¼ãçªå·ãã TCP é信端ç¹ãå¾ãã
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| 249 | */
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| 250 |
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| 251 | T_TCP_CEP*
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| 252 | tcp_find_cep (T_NET_BUF *input, uint_t off)
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| 253 | {
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| 254 | T_TCP_CEP* cep;
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| 255 | T_TCP_HDR *tcph;
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| 256 |
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| 257 | tcph = GET_TCP_HDR(input, off);
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| 258 |
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| 259 | /*
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| 260 | * ç¶æ
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| 261 | ã SYN éä¿¡æ¸ã¿ä»¥å¾ã¯ã
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| 262 | * IP ã¢ãã¬ã¹ã¨ãã¼ãçªå·ãä¸è´ãã TCP é信端ç¹ãæ¢ç´¢ããã
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| 263 | */
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| 264 | for (cep = &tcp_cep[tmax_tcp_cepid]; cep -- != tcp_cep; ) {
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| 265 | if (cep->fsm_state >= TCP_FSM_SYN_SENT &&
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| 266 | IN_IS_DSTADDR_ACCEPT (&cep->myaddr.ipaddr, input) &&
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| 267 | IN_ARE_NET_SRCADDR_EQUAL(&cep->dstaddr.ipaddr, input) &&
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| 268 | tcph->dport == cep->myaddr.portno &&
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| 269 | tcph->sport == cep->dstaddr.portno)
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| 270 | return cep;
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| 271 | }
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| 272 |
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| 273 | /* IPv4 ã§ååãªã¼ãã³ä¸ã® TCP é信端ç¹ãå
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| 274 | ã«æ¢ç´¢ããã*/
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| 275 | for (cep = &tcp_cep[tmax_tcp_cepid]; cep -- != tcp_cep; ) {
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| 276 | if ((cep->flags & TCP_CEP_FLG_IPV4) &&
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| 277 | cep->fsm_state == TCP_FSM_LISTEN &&
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| 278 | GET_IP_VER(input) == IPV4_VERSION &&
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| 279 | IN_IS_DSTADDR_ACCEPT(&cep->myaddr.ipaddr, input) &&
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| 280 | tcph->dport == cep->myaddr.portno)
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| 281 | return cep;
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| 282 | }
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| 283 |
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| 284 | /* ååãªã¼ãã³ä¸ã® TCP é信端ç¹ãæ¢ç´¢ããã*/
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| 285 | for (cep = &tcp_cep[tmax_tcp_cepid]; cep -- != tcp_cep; ) {
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| 286 |
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| 287 | #if defined(_IP6_CFG) && defined(_IP4_CFG)
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| 288 |
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| 289 | if (cep->flags & TCP_CEP_FLG_IPV4) {
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| 290 | if (cep->fsm_state == TCP_FSM_LISTEN &&
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| 291 | GET_IP_VER(input) == IPV4_VERSION &&
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| 292 | IN_IS_DSTADDR_ACCEPT(&cep->myaddr.ipaddr, input) &&
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| 293 | tcph->dport == cep->myaddr.portno)
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| 294 | return cep;
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| 295 | }
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| 296 | else {
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| 297 |
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| 298 | #if defined(API_CFG_IP4MAPPED_ADDR)
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| 299 |
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| 300 | if (cep->fsm_state == TCP_FSM_LISTEN &&
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| 301 | IN_IS_DSTADDR_ACCEPT(&cep->myaddr.ipaddr, input) &&
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| 302 | tcph->dport == cep->myaddr.portno)
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| 303 | return cep;
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| 304 |
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| 305 | #else /* of #if defined(API_CFG_IP4MAPPED_ADDR) */
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| 306 |
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| 307 | if (cep->fsm_state == TCP_FSM_LISTEN &&
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| 308 | INN6_IS_DSTADDR_ACCEPT(&cep->myaddr.ipaddr, input) &&
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| 309 | tcph->dport == cep->myaddr.portno)
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| 310 | return cep;
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| 311 |
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| 312 | #endif /* of #if defined(API_CFG_IP4MAPPED_ADDR) */
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| 313 |
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| 314 | }
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| 315 |
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| 316 | #else /* of #if defined(_IP6_CFG) && defined(_IP4_CFG) */
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| 317 |
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| 318 | if (cep->fsm_state == TCP_FSM_LISTEN &&
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| 319 | IN_IS_DSTADDR_ACCEPT(&cep->myaddr.ipaddr, input) &&
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| 320 | tcph->dport == cep->myaddr.portno)
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| 321 | return cep;
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| 322 |
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| 323 | #endif /* of #if defined(_IP6_CFG) && defined(_IP4_CFG) */
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| 324 | }
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| 325 |
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| 326 | return NULL;
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| 327 | }
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| 328 |
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| 329 | /*
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| 330 | * tcp_is_addr_accept -- åä¿¡å¯è½ãª IP ã¢ãã¬ã¹ã¨ãã¼ãçªå·ã§ãããã¨ã確èªããã
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| 331 | */
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| 332 |
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| 333 | bool_t
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| 334 | tcp_is_addr_accept (T_NET_BUF *input, uint_t off)
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| 335 | {
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| 336 | T_TCP_HDR *tcph;
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| 337 |
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| 338 | tcph = GET_TCP_HDR(input, off);
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| 339 |
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| 340 | #if !defined(_IP6_CFG) && defined(_IP4_CFG) && defined(SUPPORT_LOOP)
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| 341 |
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| 342 | /*
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| 343 | * 次ã®ã¨ãã¯ç ´æ£ããã
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| 344 | * ã»ãã¼ãçªå·ãåä¸ã§ãéåä¿¡ IP ã¢ãã¬ã¹ ãåä¸ã
|
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| 345 | * ãã ããéä¿¡å
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| 346 | IP ã¢ãã¬ã¹ããã¼ã«ã«ã«ã¼ãããã¯ãªãè¯ãã
|
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| 347 | * ã»ãã«ããã£ã¹ãã¢ãã¬ã¹
|
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| 348 | */
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| 349 |
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| 350 | if (tcph->dport == tcph->sport &&
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| 351 | (IN4_ARE_HDR_ADDR_EQUAL(input) && !IN4_ARE_NET_ADDR_EQUAL(&GET_IP4_HDR(input)->dst, &IPV4_ADDR_LOOPBACK)))
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| 352 | return RET_DROP;
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| 353 |
|
---|
| 354 | #else /* of #if !defined(_IP6_CFG) && defined(_IP4_CFG) && defined(SUPPORT_LOOP) */
|
---|
| 355 |
|
---|
| 356 | /*
|
---|
| 357 | * 次ã®ã¨ãã¯ãåä¿¡å¯è½ã§ã¯ãªãã
|
---|
| 358 | * ã»ãã¼ãçªå·ãåä¸ã§ãéåä¿¡ IP ã¢ãã¬ã¹ ãåä¸ã
|
---|
| 359 | * ã»ãã«ããã£ã¹ãã¢ãã¬ã¹
|
---|
| 360 | */
|
---|
| 361 | if (tcph->dport == tcph->sport && IN_ARE_HDR_ADDR_EQUAL(input))
|
---|
| 362 | return false;
|
---|
| 363 |
|
---|
| 364 | #endif /* of #if !defined(_IP6_CFG) && defined(_IP4_CFG) && defined(SUPPORT_LOOP) */
|
---|
| 365 |
|
---|
| 366 | if (IN_IS_NET_ADDR_MULTICAST(input))
|
---|
| 367 | return false;
|
---|
| 368 | else
|
---|
| 369 | return true;
|
---|
| 370 | }
|
---|
| 371 |
|
---|
| 372 | /*
|
---|
| 373 | * tcp_free_reassq -- åä¿¡åæ§æãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 374 | *
|
---|
| 375 | * 注æ:
|
---|
| 376 | * å¿
|
---|
| 377 | è¦ã§ããã°ããã®é¢æ°ãå¼ã³åºãåã«ãé信端ç¹ãããã¯ãã
|
---|
| 378 | * æ»ã£ãå¾ã解é¤ããå¿
|
---|
| 379 | è¦ãããã
|
---|
| 380 | */
|
---|
| 381 |
|
---|
| 382 | void
|
---|
| 383 | tcp_free_reassq (T_TCP_CEP *cep)
|
---|
| 384 | {
|
---|
| 385 | T_NET_BUF *q, *nq;
|
---|
| 386 |
|
---|
| 387 | for (q = cep->reassq; q != NULL; q = nq) {
|
---|
| 388 | nq = GET_TCP_Q_HDR(q, GET_IP_TCP_Q_HDR_OFFSET(q))->next;
|
---|
| 389 | syscall(rel_net_buf(q));
|
---|
| 390 | }
|
---|
| 391 | cep->reassq = NULL;
|
---|
| 392 | NET_COUNT_TCP(net_count_tcp[NC_TCP_FREE_RCV_QUEUE], 1);
|
---|
| 393 | }
|
---|
| 394 |
|
---|
| 395 | /*
|
---|
| 396 | * tcp_alloc_auto_port -- èªåå²ãå½ã¦ãã¼ãçªå·ãè¨å®ããã
|
---|
| 397 | */
|
---|
| 398 |
|
---|
| 399 | void
|
---|
| 400 | tcp_alloc_auto_port (T_TCP_CEP *cep)
|
---|
| 401 | {
|
---|
| 402 | int_t ix;
|
---|
| 403 | uint16_t portno;
|
---|
| 404 |
|
---|
| 405 | while (true) {
|
---|
| 406 | portno = tcp_port_auto ++;
|
---|
| 407 | if (tcp_port_auto > TCP_PORT_LAST_AUTO)
|
---|
| 408 | tcp_port_auto = TCP_PORT_FIRST_AUTO;
|
---|
| 409 |
|
---|
| 410 | #if defined(TNUM_TCP6_REPID)
|
---|
| 411 | #if TNUM_TCP6_REPID > 0
|
---|
| 412 |
|
---|
| 413 | for (ix = tmax_tcp6_repid; ix -- > 0; ) {
|
---|
| 414 |
|
---|
| 415 | #ifdef TCP_CFG_EXTENTIONS
|
---|
| 416 |
|
---|
| 417 | if (VALID_TCP_REP(&tcp6_rep[ix]) && tcp6_rep[ix].myaddr.portno == portno) {
|
---|
| 418 | portno = TCP_PORTANY;
|
---|
| 419 | break;
|
---|
| 420 | }
|
---|
| 421 |
|
---|
| 422 | #else /* of #ifdef TCP_CFG_EXTENTIONS */
|
---|
| 423 |
|
---|
| 424 | if (tcp6_rep[ix].myaddr.portno == portno) {
|
---|
| 425 | portno = TCP_PORTANY;
|
---|
| 426 | break;
|
---|
| 427 | }
|
---|
| 428 |
|
---|
| 429 | #endif /* of #ifdef TCP_CFG_EXTENTIONS */
|
---|
| 430 |
|
---|
| 431 | }
|
---|
| 432 |
|
---|
| 433 | #endif /* of #if TNUM_TCP6_REPID > 0 */
|
---|
| 434 | #endif /* of #if defined(TNUM_TCP6_REPID) */
|
---|
| 435 |
|
---|
| 436 | #if defined(TNUM_TCP4_REPID)
|
---|
| 437 | #if TNUM_TCP4_REPID > 0
|
---|
| 438 |
|
---|
| 439 | for (ix = tmax_tcp4_repid; ix -- > 0; ) {
|
---|
| 440 |
|
---|
| 441 | #ifdef TCP_CFG_EXTENTIONS
|
---|
| 442 |
|
---|
| 443 | if (VALID_TCP_REP(&tcp4_rep[ix]) && tcp4_rep[ix].myaddr.portno == portno) {
|
---|
| 444 | portno = TCP_PORTANY;
|
---|
| 445 | break;
|
---|
| 446 | }
|
---|
| 447 |
|
---|
| 448 | #else /* of #ifdef TCP_CFG_EXTENTIONS */
|
---|
| 449 |
|
---|
| 450 | if (tcp4_rep[ix].myaddr.portno == portno) {
|
---|
| 451 | portno = TCP_PORTANY;
|
---|
| 452 | break;
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | #endif /* of #ifdef TCP_CFG_EXTENTIONS */
|
---|
| 456 |
|
---|
| 457 | }
|
---|
| 458 |
|
---|
| 459 | #endif /* of #if TNUM_TCP4_REPID > 0 */
|
---|
| 460 | #endif /* of #if defined(TNUM_TCP4_REPID) */
|
---|
| 461 |
|
---|
| 462 | if (portno != TCP_PORTANY) {
|
---|
| 463 |
|
---|
| 464 | syscall(wai_sem(SEM_TCP_CEP));
|
---|
| 465 | for (ix = tmax_tcp_cepid; ix -- > 0; ) {
|
---|
| 466 | if (VALID_TCP_CEP(&tcp_cep[ix]) && tcp_cep[ix].myaddr.portno == portno) {
|
---|
| 467 | portno = TCP_PORTANY;
|
---|
| 468 | break;
|
---|
| 469 | }
|
---|
| 470 | }
|
---|
| 471 |
|
---|
| 472 | if (portno != TCP_PORTANY) {
|
---|
| 473 | cep->myaddr.portno = portno;
|
---|
| 474 | syscall(sig_sem(SEM_TCP_CEP));
|
---|
| 475 | return;
|
---|
| 476 | }
|
---|
| 477 | syscall(sig_sem(SEM_TCP_CEP));
|
---|
| 478 | }
|
---|
| 479 | }
|
---|
| 480 | }
|
---|
| 481 |
|
---|
| 482 | /*
|
---|
| 483 | * tcp_alloc_port -- æå®ããããã¼ãçªå·ãè¨å®ããã
|
---|
| 484 | */
|
---|
| 485 |
|
---|
| 486 | ER
|
---|
| 487 | tcp_alloc_port (T_TCP_CEP *cep, uint16_t portno)
|
---|
| 488 | {
|
---|
| 489 | int_t ix;
|
---|
| 490 |
|
---|
| 491 | syscall(wai_sem(SEM_TCP_CEP));
|
---|
| 492 | for (ix = tmax_tcp_cepid; ix -- > 0; )
|
---|
| 493 | if (VALID_TCP_CEP(cep) && tcp_cep[ix].myaddr.portno == portno) {
|
---|
| 494 | syscall(sig_sem(SEM_TCP_CEP));
|
---|
| 495 | return E_PAR;
|
---|
| 496 | }
|
---|
| 497 | cep->myaddr.portno = portno;
|
---|
| 498 | syscall(sig_sem(SEM_TCP_CEP));
|
---|
| 499 | return E_OK;
|
---|
| 500 | }
|
---|
| 501 |
|
---|
| 502 | /*
|
---|
| 503 | * tcp_init -- TCP ã¢ã¸ã¥ã¼ã«ã®åæå
|
---|
| 504 | */
|
---|
| 505 |
|
---|
| 506 | void
|
---|
| 507 | tcp_init (void)
|
---|
| 508 | {
|
---|
| 509 | timeout(tcp_slow_timo, NULL, TCP_SLOW_TMO);
|
---|
| 510 |
|
---|
| 511 | #ifdef TCP_CFG_DELAY_ACK
|
---|
| 512 |
|
---|
| 513 | timeout(tcp_fast_timo, NULL, TCP_FAST_TMO);
|
---|
| 514 |
|
---|
| 515 | #endif/* of #ifdef TCP_CFG_DELAY_ACK */
|
---|
| 516 | }
|
---|
| 517 |
|
---|
| 518 | /*
|
---|
| 519 | * tcp_init_iss ã·ã¼ã±ã³ã¹çªå·ãåæåããã
|
---|
| 520 | */
|
---|
| 521 |
|
---|
| 522 | void
|
---|
| 523 | tcp_init_iss (void)
|
---|
| 524 | {
|
---|
| 525 | SYSTIM now;
|
---|
| 526 |
|
---|
| 527 | syscall(get_tim(&now));
|
---|
| 528 | net_srand(now);
|
---|
| 529 | tcp_iss = net_rand();
|
---|
| 530 | }
|
---|
| 531 |
|
---|
| 532 | /*
|
---|
| 533 | * tcp_close -- ã³ãã¯ã·ã§ã³ãéæ¾ããã
|
---|
| 534 | */
|
---|
| 535 |
|
---|
| 536 | T_TCP_CEP *
|
---|
| 537 | tcp_close (T_TCP_CEP *cep)
|
---|
| 538 | {
|
---|
| 539 | /* ã¿ã¤ãã¼ãåæ¢ããã*/
|
---|
| 540 | tcp_cancel_timers(cep);
|
---|
| 541 |
|
---|
| 542 | /*
|
---|
| 543 | * é信端ç¹ãããã¯ãã
|
---|
| 544 | * åä¿¡åæ§æãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 545 | */
|
---|
| 546 | syscall(wai_sem(cep->semid_lock));
|
---|
| 547 | tcp_free_reassq(cep);
|
---|
| 548 | syscall(sig_sem(cep->semid_lock));
|
---|
| 549 |
|
---|
| 550 | /* ç¶æ
|
---|
| 551 | ãæªä½¿ç¨ã«ããã*/
|
---|
| 552 | cep->fsm_state = TCP_FSM_CLOSED;
|
---|
| 553 |
|
---|
| 554 | /*
|
---|
| 555 | * 以ä¸ã«é¢ä¿ããªããã©ã°ãã¯ãªã¢ã¼ããã
|
---|
| 556 | * ã»éåä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½
|
---|
| 557 | * ã»åçãªé信端ç¹ã®çæã»åé¤æ©è½
|
---|
| 558 | * ã»é信端ç¹ã®ãããã¯ã¼ã¯å±¤ãããã³ã«
|
---|
| 559 | */
|
---|
| 560 | cep->flags &= TCP_CEP_FLG_NOT_CLEAR;
|
---|
| 561 |
|
---|
| 562 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
| 563 |
|
---|
| 564 | if (cep->snd_nblk_tfn != TFN_TCP_UNDEF || cep->rcv_nblk_tfn != TFN_TCP_UNDEF) {
|
---|
| 565 | /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
| 566 |
|
---|
| 567 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
| 568 |
|
---|
| 569 | if (!IS_PTR_DEFINED(cep->callback))
|
---|
| 570 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
|
---|
| 571 | else {
|
---|
| 572 | if (cep->rcv_nblk_tfn != TFN_TCP_UNDEF) {
|
---|
| 573 | ER_UINT len;
|
---|
| 574 |
|
---|
| 575 | switch (cep->rcv_nblk_tfn) {
|
---|
| 576 |
|
---|
| 577 | case TFN_TCP_ACP_CEP:
|
---|
| 578 | /* TCP é信端ç¹ããTCP åä»å£ã解æ¾ããã*/
|
---|
| 579 | cep->rep = NULL;
|
---|
| 580 |
|
---|
| 581 | #if defined(_IP6_CFG) && defined(_IP4_CFG)
|
---|
| 582 | cep->rep4 = NULL;
|
---|
| 583 | #endif
|
---|
| 584 |
|
---|
| 585 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)E_CLS);
|
---|
| 586 | break;
|
---|
| 587 |
|
---|
| 588 | case TFN_TCP_RCV_BUF:
|
---|
| 589 |
|
---|
| 590 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ç©ºã¢ãã¬ã¹ãç²å¾ããã*/
|
---|
| 591 | len = TCP_GET_RWBUF_ADDR(cep, cep->rcv_p_buf);
|
---|
| 592 |
|
---|
| 593 | /* ç°å¸¸åæçã®ã¨ã©ã¼ãè¨å®ããã*/
|
---|
| 594 | if (cep->error == E_TMOUT)
|
---|
| 595 | len = E_CLS;
|
---|
| 596 | else if (cep->error < 0)
|
---|
| 597 | len = cep->error;
|
---|
| 598 |
|
---|
| 599 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)(uint32_t)len);
|
---|
| 600 | break;
|
---|
| 601 |
|
---|
| 602 | case TFN_TCP_RCV_DAT:
|
---|
| 603 |
|
---|
| 604 | /* åä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãåãåºãã*/
|
---|
| 605 | len = TCP_READ_RWBUF(cep, cep->rcv_data, (uint_t)cep->rcv_len);
|
---|
| 606 |
|
---|
| 607 | /* ç°å¸¸åæçã®ã¨ã©ã¼ãè¨å®ããã*/
|
---|
| 608 | if (cep->error == E_TMOUT)
|
---|
| 609 | len = E_CLS;
|
---|
| 610 | else if (cep->error != E_OK)
|
---|
| 611 | len = cep->error;
|
---|
| 612 |
|
---|
| 613 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)(uint32_t)len);
|
---|
| 614 | break;
|
---|
| 615 |
|
---|
| 616 | case TFN_TCP_CLS_CEP:
|
---|
| 617 |
|
---|
| 618 | if (cep->error == E_TMOUT)
|
---|
| 619 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)E_CLS);
|
---|
| 620 | else
|
---|
| 621 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)cep->error);
|
---|
| 622 | break;
|
---|
| 623 |
|
---|
| 624 | default:
|
---|
| 625 | syslog(LOG_WARNING, "[TCP] unexp TFN: %s.", in_strtfn((FN)cep->rcv_nblk_tfn));
|
---|
| 626 | break;
|
---|
| 627 | }
|
---|
| 628 |
|
---|
| 629 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
| 630 | cep->rcv_tskid = TA_NULL;
|
---|
| 631 | cep->rcv_tfn = cep->rcv_nblk_tfn = TFN_TCP_UNDEF;
|
---|
| 632 | }
|
---|
| 633 |
|
---|
| 634 | if (cep->snd_nblk_tfn != TFN_TCP_UNDEF) {
|
---|
| 635 |
|
---|
| 636 | switch (cep->snd_nblk_tfn) {
|
---|
| 637 |
|
---|
| 638 | case TFN_TCP_CON_CEP:
|
---|
| 639 | /* TCP é信端ç¹ãã TCP åä»å£ã解æ¾ããã*/
|
---|
| 640 | cep->rep = NULL;
|
---|
| 641 |
|
---|
| 642 | #if defined(_IP6_CFG) && defined(_IP4_CFG)
|
---|
| 643 | cep->rep4 = NULL;
|
---|
| 644 | #endif
|
---|
| 645 |
|
---|
| 646 | (*cep->callback)(GET_TCP_CEPID(cep), cep->snd_nblk_tfn, (void*)E_CLS);
|
---|
| 647 | break;
|
---|
| 648 |
|
---|
| 649 | case TFN_TCP_SND_DAT:
|
---|
| 650 | case TFN_TCP_GET_BUF:
|
---|
| 651 | if (cep->error == E_TMOUT)
|
---|
| 652 | (*cep->callback)(GET_TCP_CEPID(cep), cep->snd_nblk_tfn, (void*)E_CLS);
|
---|
| 653 | else
|
---|
| 654 | (*cep->callback)(GET_TCP_CEPID(cep), cep->snd_nblk_tfn, (void*)cep->error);
|
---|
| 655 | break;
|
---|
| 656 |
|
---|
| 657 | default:
|
---|
| 658 | syslog(LOG_WARNING, "[TCP] unexp TFN: %s.", in_strtfn((FN)cep->snd_nblk_tfn));
|
---|
| 659 | break;
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
| 663 | cep->snd_tskid = TA_NULL;
|
---|
| 664 | cep->snd_tfn = cep->snd_nblk_tfn = TFN_TCP_UNDEF;
|
---|
| 665 | }
|
---|
| 666 |
|
---|
| 667 | }
|
---|
| 668 |
|
---|
| 669 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
| 670 |
|
---|
| 671 | if (!IS_PTR_DEFINED(cep->callback))
|
---|
| 672 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
|
---|
| 673 | else {
|
---|
| 674 | if (cep->rcv_nblk_tfn != TFN_TCP_UNDEF) {
|
---|
| 675 | ER_UINT len;
|
---|
| 676 |
|
---|
| 677 | switch (cep->rcv_nblk_tfn) {
|
---|
| 678 |
|
---|
| 679 | case TFN_TCP_ACP_CEP:
|
---|
| 680 |
|
---|
| 681 | /* TCP é信端ç¹ããTCP åä»å£ã解æ¾ããã*/
|
---|
| 682 | cep->rep = NULL;
|
---|
| 683 |
|
---|
| 684 | #if defined(_IP6_CFG) && defined(_IP4_CFG)
|
---|
| 685 | cep->rep4 = NULL;
|
---|
| 686 | #endif
|
---|
| 687 |
|
---|
| 688 | /* æ¥ç¶ã¨ã©ã¼ãè¨å®ããã*/
|
---|
| 689 | len = E_CLS;
|
---|
| 690 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
| 691 | break;
|
---|
| 692 |
|
---|
| 693 | case TFN_TCP_RCV_BUF:
|
---|
| 694 |
|
---|
| 695 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ç©ºã¢ãã¬ã¹ãç²å¾ããã*/
|
---|
| 696 | len = TCP_GET_RWBUF_ADDR(cep, cep->rcv_p_buf);
|
---|
| 697 |
|
---|
| 698 | /* ç°å¸¸åæçã®ã¨ã©ã¼ãè¨å®ããã*/
|
---|
| 699 | if (cep->error == E_TMOUT)
|
---|
| 700 | len = E_CLS;
|
---|
| 701 | else if (cep->error < 0)
|
---|
| 702 | len = cep->error;
|
---|
| 703 |
|
---|
| 704 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
| 705 | break;
|
---|
| 706 |
|
---|
| 707 | case TFN_TCP_RCV_DAT:
|
---|
| 708 |
|
---|
| 709 | /* åä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãåãåºãã*/
|
---|
| 710 | len = TCP_READ_RWBUF(cep, cep->rcv_data, (uint_t)cep->rcv_len);
|
---|
| 711 |
|
---|
| 712 | /* ç°å¸¸åæçã®ã¨ã©ã¼ãè¨å®ããã*/
|
---|
| 713 | if (cep->error == E_TMOUT)
|
---|
| 714 | len = E_CLS;
|
---|
| 715 | else if (cep->error != E_OK)
|
---|
| 716 | len = cep->error;
|
---|
| 717 |
|
---|
| 718 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
| 719 | break;
|
---|
| 720 |
|
---|
| 721 | case TFN_TCP_CLS_CEP:
|
---|
| 722 | if (cep->error == E_TMOUT)
|
---|
| 723 | len = E_CLS;
|
---|
| 724 | else
|
---|
| 725 | len = cep->error;
|
---|
| 726 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
| 727 | break;
|
---|
| 728 |
|
---|
| 729 | default:
|
---|
| 730 | syslog(LOG_WARNING, "[TCP] unexp TFN: %s.", in_strtfn((FN)cep->rcv_nblk_tfn));
|
---|
| 731 | break;
|
---|
| 732 | }
|
---|
| 733 |
|
---|
| 734 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
| 735 | cep->rcv_tskid = TA_NULL;
|
---|
| 736 | cep->rcv_tfn = cep->rcv_nblk_tfn = TFN_TCP_UNDEF;
|
---|
| 737 | }
|
---|
| 738 |
|
---|
| 739 | if (cep->snd_nblk_tfn != TFN_TCP_UNDEF) {
|
---|
| 740 | ER_UINT len;
|
---|
| 741 |
|
---|
| 742 | switch (cep->snd_nblk_tfn) {
|
---|
| 743 |
|
---|
| 744 | case TFN_TCP_CON_CEP:
|
---|
| 745 |
|
---|
| 746 | /* TCP é信端ç¹ããTCP åä»å£ã解æ¾ããã*/
|
---|
| 747 | cep->rep = NULL;
|
---|
| 748 |
|
---|
| 749 | #if defined(_IP6_CFG) && defined(_IP4_CFG)
|
---|
| 750 | cep->rep4 = NULL;
|
---|
| 751 | #endif
|
---|
| 752 |
|
---|
| 753 | /* æ¥ç¶ã¨ã©ã¼ãè¨å®ããã*/
|
---|
| 754 | len = E_CLS;
|
---|
| 755 | (*cep->callback)(GET_TCP_CEPID(cep), cep->snd_nblk_tfn, (void*)&len);
|
---|
| 756 | break;
|
---|
| 757 |
|
---|
| 758 | case TFN_TCP_SND_DAT:
|
---|
| 759 | case TFN_TCP_GET_BUF:
|
---|
| 760 | if (cep->error == E_TMOUT)
|
---|
| 761 | len = E_CLS;
|
---|
| 762 | else
|
---|
| 763 | len = cep->error;
|
---|
| 764 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
| 765 | break;
|
---|
| 766 |
|
---|
| 767 | default:
|
---|
| 768 | syslog(LOG_WARNING, "[TCP] unexp TFN: %s.", in_strtfn((FN)cep->snd_nblk_tfn));
|
---|
| 769 | break;
|
---|
| 770 | }
|
---|
| 771 |
|
---|
| 772 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
| 773 | cep->snd_tskid = TA_NULL;
|
---|
| 774 | cep->snd_tfn = cep->snd_nblk_tfn = TFN_TCP_UNDEF;
|
---|
| 775 | }
|
---|
| 776 |
|
---|
| 777 | }
|
---|
| 778 |
|
---|
| 779 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
| 780 |
|
---|
| 781 | /*
|
---|
| 782 | * é信端ç¹ãããã¯ãã
|
---|
| 783 | * éåä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 784 | */
|
---|
| 785 | syscall(wai_sem(cep->semid_lock));
|
---|
| 786 | TCP_FREE_RWBUFQ(cep);
|
---|
| 787 | TCP_FREE_SWBUFQ(cep);
|
---|
| 788 | syscall(sig_sem(cep->semid_lock));
|
---|
| 789 |
|
---|
| 790 | /* æªä½¿ç¨ã«ãªã£ããã¨ãç¥ãããã*/
|
---|
| 791 | syscall(set_flg(cep->est_flgid, TCP_CEP_EVT_CLOSED));
|
---|
| 792 | }
|
---|
| 793 | else { /* éãã³ããããã³ã°ã³ã¼ã« */
|
---|
| 794 |
|
---|
| 795 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
| 796 |
|
---|
| 797 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
| 798 | cep->snd_tskid = cep->rcv_tskid = TA_NULL;
|
---|
| 799 | cep->snd_tfn = cep->rcv_tfn = TFN_TCP_UNDEF;
|
---|
| 800 |
|
---|
| 801 | /*
|
---|
| 802 | * é信端ç¹ãããã¯ãã
|
---|
| 803 | * éåä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 804 | */
|
---|
| 805 | syscall(wai_sem(cep->semid_lock));
|
---|
| 806 | TCP_FREE_RWBUFQ(cep);
|
---|
| 807 | TCP_FREE_SWBUFQ(cep);
|
---|
| 808 | syscall(sig_sem(cep->semid_lock));
|
---|
| 809 |
|
---|
| 810 | /* æªä½¿ç¨ã«ãªã£ããã¨ãç¥ãããã*/
|
---|
| 811 | syscall(set_flg(cep->est_flgid, TCP_CEP_EVT_CLOSED));
|
---|
| 812 |
|
---|
| 813 | /*
|
---|
| 814 | * å
|
---|
| 815 | ¥åºåã¿ã¹ã¯ãèµ·åºãã¦ã
|
---|
| 816 | * éåä¿¡ä¸å¯ã«ãªã£ããã¨ãç¥ãããã
|
---|
| 817 | */
|
---|
| 818 | syscall(set_flg(cep->snd_flgid, TCP_CEP_EVT_SWBUF_READY));
|
---|
| 819 | syscall(set_flg(cep->rcv_flgid, TCP_CEP_EVT_RWBUF_READY));
|
---|
| 820 |
|
---|
| 821 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
| 822 |
|
---|
| 823 | }
|
---|
| 824 |
|
---|
| 825 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
| 826 |
|
---|
| 827 | return NULL;
|
---|
| 828 | }
|
---|
| 829 |
|
---|
| 830 | /*
|
---|
| 831 | * tcp_drop -- TCP æ¥ç¶ãç ´æ£ããã
|
---|
| 832 | */
|
---|
| 833 |
|
---|
| 834 | T_TCP_CEP *
|
---|
| 835 | tcp_drop (T_TCP_CEP *cep, ER errno)
|
---|
| 836 | {
|
---|
| 837 | #ifdef SUPPORT_MIB
|
---|
| 838 |
|
---|
| 839 | if ((cep->fsm_state == TCP_FSM_SYN_SENT) || (cep->fsm_state == TCP_FSM_SYN_RECVD)) {
|
---|
| 840 | NET_COUNT_MIB(tcp_stats.tcpAttemptFails, 1);
|
---|
| 841 | }
|
---|
| 842 |
|
---|
| 843 | #endif /* of #ifdef SUPPORT_MIB */
|
---|
| 844 |
|
---|
| 845 | cep->error = errno;
|
---|
| 846 | if (TCP_FSM_HAVE_RCVD_SYN(cep->fsm_state)) {
|
---|
| 847 | cep->fsm_state = TCP_FSM_CLOSED;
|
---|
| 848 |
|
---|
| 849 | /* éä¿¡ã¨ãéä¿¡å¾ã³ãã¯ã·ã§ã³ã®åæãæ示ããã*/
|
---|
| 850 | cep->flags |= TCP_CEP_FLG_POST_OUTPUT | TCP_CEP_FLG_CLOSE_AFTER_OUTPUT;
|
---|
| 851 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
| 852 | }
|
---|
| 853 | else {
|
---|
| 854 | cep = tcp_close(cep);
|
---|
| 855 | }
|
---|
| 856 | return cep;
|
---|
| 857 | }
|
---|
| 858 |
|
---|
| 859 | /*
|
---|
| 860 | * tcp_respond -- TCP ã®åä¸ã¡ãã»ã¼ã¸ãéä¿¡ããã
|
---|
| 861 | */
|
---|
| 862 |
|
---|
| 863 | void
|
---|
| 864 | tcp_respond (T_NET_BUF *output, T_TCP_CEP *cep,
|
---|
| 865 | T_TCP_SEQ ack, T_TCP_SEQ seq, uint_t rbfree, uint8_t flags)
|
---|
| 866 | {
|
---|
| 867 | T_TCP_HDR *tcph;
|
---|
| 868 | uint_t win = 0;
|
---|
| 869 | uint_t hdr_offset;
|
---|
| 870 |
|
---|
| 871 | if ((flags & TCP_FLG_RST) == 0)
|
---|
| 872 | win = rbfree;
|
---|
| 873 |
|
---|
| 874 | /*
|
---|
| 875 | * output ã NULL ã§ãªããã°ãããã¯å
|
---|
| 876 | ¥åããã»ã°ã¡ã³ãã®
|
---|
| 877 | * net_buf ã§ããã®ã¾ã¾åå©ç¨ããã
|
---|
| 878 | */
|
---|
| 879 | if (output != NULL) {
|
---|
| 880 | uint16_t portno;
|
---|
| 881 |
|
---|
| 882 | /*
|
---|
| 883 | * IPv4 ã§ã¯ãIP ãããã®ãªãã·ã§ã³ãåé¤ããã
|
---|
| 884 | * IPv6 ã§ã¯ãæ¡å¼µããããåé¤ããã
|
---|
| 885 | */
|
---|
| 886 | if (IP_REMOVE_OPTIONS(output) != E_OK) {
|
---|
| 887 | syscall(rel_net_buf(output));
|
---|
| 888 | return;
|
---|
| 889 | }
|
---|
| 890 |
|
---|
| 891 | ip_exchg_addr(output);
|
---|
| 892 |
|
---|
| 893 | #if defined(_IP6_CFG)
|
---|
| 894 |
|
---|
| 895 | /* ãã©ããã¯ã¯ã©ã¹ã¨ããã¼ã©ãã«ãã¯ãªã¢ããã*/
|
---|
| 896 | SET_IP_CF(output, 0);
|
---|
| 897 |
|
---|
| 898 | #endif /* of #if defined(_IP6_CFG) */
|
---|
| 899 |
|
---|
| 900 | /* TCP SDU é·ã 0 ã«ããã*/
|
---|
| 901 | SET_IP_SDU_SIZE(output, TCP_HDR_SIZE);
|
---|
| 902 |
|
---|
| 903 | tcph = GET_TCP_HDR(output, IF_IP_TCP_HDR_OFFSET(output));
|
---|
| 904 |
|
---|
| 905 | /* ãã¼ãçªå·ã交æããã*/
|
---|
| 906 | portno = tcph->sport;
|
---|
| 907 | tcph->sport = tcph->dport;
|
---|
| 908 | tcph->dport = portno;
|
---|
| 909 |
|
---|
| 910 | /* TCP ãããã«æ
|
---|
| 911 | å ±ãè¨å®ããã*/
|
---|
| 912 | tcph->doff = TCP_MAKE_DATA_OFF(TCP_HDR_SIZE);
|
---|
| 913 | }
|
---|
| 914 |
|
---|
| 915 | /* cep ã NULL ã§ããã°ãä½ãããªãã§çµäºããã*/
|
---|
| 916 | else if (cep == NULL)
|
---|
| 917 | return;
|
---|
| 918 | else {
|
---|
| 919 | if (tcpn_get_segment(&output, cep, 0,
|
---|
| 920 | 0, (uint_t)net_buf_max_siz(),
|
---|
| 921 | NBA_SEARCH_ASCENT, TMO_TCP_GET_NET_BUF) != E_OK)
|
---|
| 922 | return;
|
---|
| 923 | tcph = GET_TCP_HDR(output, IF_IP_TCP_HDR_OFFSET(output));
|
---|
| 924 | flags |= TCP_FLG_ACK;
|
---|
| 925 | }
|
---|
| 926 |
|
---|
| 927 | tcph->seq = htonl(seq);
|
---|
| 928 | tcph->ack = htonl(ack);
|
---|
| 929 | tcph->win = htons(win);
|
---|
| 930 | tcph->flags = flags;
|
---|
| 931 | tcph->urp = tcph->sum = 0;
|
---|
| 932 |
|
---|
| 933 | /*
|
---|
| 934 | * ãã§ãã¯ãµã ãè¨å®ããã
|
---|
| 935 | */
|
---|
| 936 | hdr_offset = IF_IP_TCP_HDR_OFFSET(output);
|
---|
| 937 | tcph->sum = IN_CKSUM(output, IPPROTO_TCP, hdr_offset,
|
---|
| 938 | (uint_t)GET_TCP_HDR_SIZE(output, hdr_offset));
|
---|
| 939 |
|
---|
| 940 | /* ãããã¯ã¼ã¯ãããã¡é·ã調æ´ããã*/
|
---|
| 941 | output->len = (uint16_t)GET_IF_IP_TCP_HDR_SIZE(output, hdr_offset);
|
---|
| 942 |
|
---|
| 943 | #ifdef TCP_CFG_TRACE
|
---|
| 944 |
|
---|
| 945 | tcp_output_trace(output, cep);
|
---|
| 946 |
|
---|
| 947 | #endif /* of #ifdef TCP_CFG_TRACE */
|
---|
| 948 |
|
---|
| 949 | /* ãããã¯ã¼ã¯å±¤ (IP) ã®åºåé¢æ°ãå¼ã³åºãã*/
|
---|
| 950 | IP_OUTPUT(output, TMO_TCP_OUTPUT);
|
---|
| 951 | }
|
---|
| 952 | #if 0
|
---|
| 953 | /*
|
---|
| 954 | * tcp_get_segment -- TCP ã»ã°ã¡ã³ããç²å¾ããããããè¨å®ããã
|
---|
| 955 | *
|
---|
| 956 | * æ»ãå¤ ã¨ã©ã¼ã³ã¼ã
|
---|
| 957 | * optlen ãªãã·ã§ã³ãµã¤ãºã4 ãªã¯ãããåä½
|
---|
| 958 | * maxlen æ大ã»ã°ã¡ã³ããµã¤ãºï¼IF/IP/TCP ããããµã¤ãºãå«ã¾ãªãï¼
|
---|
| 959 | * len TCP SDU ãµã¤ãº
|
---|
| 960 | */
|
---|
| 961 |
|
---|
| 962 | ER
|
---|
| 963 | tcp_get_segment (T_NET_BUF **nbuf, T_TCP_CEP *cep,
|
---|
| 964 | uint_t optlen, uint_t len, uint_t maxlen, ATR nbatr, TMO tmout)
|
---|
| 965 | {
|
---|
| 966 | T_TCP_HDR *tcph;
|
---|
| 967 | ER error;
|
---|
| 968 |
|
---|
| 969 | /* IP ãã¼ã¿ã°ã©ã ãç²å¾ããã*/
|
---|
| 970 | if ((error = IN_GET_DATAGRAM(nbuf,
|
---|
| 971 | (uint_t)(TCP_HDR_SIZE + optlen + len),
|
---|
| 972 | (uint_t)(TCP_HDR_SIZE + maxlen),
|
---|
| 973 | &cep->dstaddr.ipaddr,
|
---|
| 974 | &cep->myaddr.ipaddr,
|
---|
| 975 | IPPROTO_TCP, IP_DEFTTL, nbatr, tmout)) != E_OK) {
|
---|
| 976 | syslog(LOG_WARNING, "[TCP] NET BUF busy, len: %d, CEP: %d.",
|
---|
| 977 | (uint16_t)(TCP_HDR_SIZE + optlen + len), GET_TCP_CEPID(cep));
|
---|
| 978 | return error;
|
---|
| 979 | }
|
---|
| 980 |
|
---|
| 981 | /* TCP ãããã«æ
|
---|
| 982 | å ±ãè¨å®ããã*/
|
---|
| 983 |
|
---|
| 984 | /* TCP ãããã«æ
|
---|
| 985 | å ±ãè¨å®ããã*/
|
---|
| 986 | tcph = GET_TCP_HDR(*nbuf, IF_IP_TCP_HDR_OFFSET(*nbuf));
|
---|
| 987 | tcph->sport = htons(cep->myaddr.portno);
|
---|
| 988 | tcph->dport = htons(cep->dstaddr.portno);
|
---|
| 989 | tcph->doff = TCP_MAKE_DATA_OFF(TCP_HDR_SIZE + optlen);
|
---|
| 990 | tcph->sum = tcph->flags = 0;
|
---|
| 991 |
|
---|
| 992 | return E_OK;
|
---|
| 993 | }
|
---|
| 994 | #endif
|
---|
| 995 | /*
|
---|
| 996 | * tcpn_get_segment -- TCP ã»ã°ã¡ã³ããç²å¾ããããããè¨å®ããã
|
---|
| 997 | *
|
---|
| 998 | * æ»ãå¤ ã¨ã©ã¼ã³ã¼ã
|
---|
| 999 | * optlen ãªãã·ã§ã³ãµã¤ãºã4 ãªã¯ãããåä½
|
---|
| 1000 | * maxlen æ大ã»ã°ã¡ã³ããµã¤ãºï¼IF/IP/TCP ããããµã¤ãºãå«ãï¼
|
---|
| 1001 | * len TCP SDU ãµã¤ãº
|
---|
| 1002 | */
|
---|
| 1003 |
|
---|
| 1004 | ER
|
---|
| 1005 | tcpn_get_segment (T_NET_BUF **nbuf, T_TCP_CEP *cep,
|
---|
| 1006 | uint_t optlen, uint_t len, uint_t maxlen, ATR nbatr, TMO tmout)
|
---|
| 1007 | {
|
---|
| 1008 | T_TCP_HDR *tcph;
|
---|
| 1009 | ER error;
|
---|
| 1010 |
|
---|
| 1011 | /* IP ãã¼ã¿ã°ã©ã ãç²å¾ããã*/
|
---|
| 1012 | if ((error = IN_GET_DATAGRAM(nbuf,
|
---|
| 1013 | (uint_t)(TCP_HDR_SIZE + optlen + len),
|
---|
| 1014 | (uint_t)(maxlen - IF_IP_NET_HDR_SIZE(&cep->dstaddr.ipaddr)),
|
---|
| 1015 | &cep->dstaddr.ipaddr,
|
---|
| 1016 | &cep->myaddr.ipaddr,
|
---|
| 1017 | IPPROTO_TCP, IP_DEFTTL, nbatr, tmout)) != E_OK) {
|
---|
| 1018 | syslog(LOG_WARNING, "[TCP] NET BUF busy, len:%4d, CEP: %d.",
|
---|
| 1019 | (uint16_t)(TCP_HDR_SIZE + optlen + len), GET_TCP_CEPID(cep));
|
---|
| 1020 | return error;
|
---|
| 1021 | }
|
---|
| 1022 |
|
---|
| 1023 | /* TCP ãããã«æ
|
---|
| 1024 | å ±ãè¨å®ããã*/
|
---|
| 1025 |
|
---|
| 1026 | /* TCP ãããã«æ
|
---|
| 1027 | å ±ãè¨å®ããã*/
|
---|
| 1028 | tcph = GET_TCP_HDR(*nbuf, IF_IP_TCP_HDR_OFFSET(*nbuf));
|
---|
| 1029 | tcph->sport = htons(cep->myaddr.portno);
|
---|
| 1030 | tcph->dport = htons(cep->dstaddr.portno);
|
---|
| 1031 | tcph->doff = TCP_MAKE_DATA_OFF(TCP_HDR_SIZE + optlen);
|
---|
| 1032 | tcph->sum = tcph->flags = 0;
|
---|
| 1033 |
|
---|
| 1034 | return E_OK;
|
---|
| 1035 | }
|
---|
| 1036 |
|
---|
| 1037 | /*
|
---|
| 1038 | * tcp_can_send_more -- éä¿¡ã§ããããé信端ç¹ã®ç¶æ
|
---|
| 1039 | ãè¦ãã
|
---|
| 1040 | */
|
---|
| 1041 |
|
---|
| 1042 | ER
|
---|
| 1043 | tcp_can_send_more (T_TCP_CEP *cep, FN fncd, TMO tmout)
|
---|
| 1044 | {
|
---|
| 1045 | ER error;
|
---|
| 1046 |
|
---|
| 1047 | /* éä¿¡ã§ããããCEP ã® FSM ç¶æ
|
---|
| 1048 | ãè¦ãã*/
|
---|
| 1049 | if (!TCP_FSM_CAN_SEND_MORE(cep->fsm_state)) {
|
---|
| 1050 | if ((error = cep->error) == E_OK)
|
---|
| 1051 | error = E_OBJ;
|
---|
| 1052 |
|
---|
| 1053 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
| 1054 |
|
---|
| 1055 | /* ã¿ã¤ã ã¢ã¦ãããã§ãã¯ããã*/
|
---|
| 1056 | if (tmout == TMO_NBLK) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
| 1057 |
|
---|
| 1058 | if (!IS_PTR_DEFINED(cep->callback))
|
---|
| 1059 | error = E_OBJ;
|
---|
| 1060 | else {
|
---|
| 1061 | /* ã³ã¼ã«ããã¯é¢æ°ãå¼ã³åºãã*/
|
---|
| 1062 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
| 1063 | (*cep->callback)(GET_TCP_CEPID(cep), fncd, (void*)error);
|
---|
| 1064 | #else
|
---|
| 1065 | (*cep->callback)(GET_TCP_CEPID(cep), fncd, (void*)&error);
|
---|
| 1066 | #endif
|
---|
| 1067 | error = E_WBLK;
|
---|
| 1068 | }
|
---|
| 1069 | }
|
---|
| 1070 |
|
---|
| 1071 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
| 1072 |
|
---|
| 1073 | }
|
---|
| 1074 | else {
|
---|
| 1075 |
|
---|
| 1076 | #ifdef TCP_CFG_SWBUF_CSAVE
|
---|
| 1077 |
|
---|
| 1078 | error = E_OK;
|
---|
| 1079 |
|
---|
| 1080 | #else /* of #ifdef TCP_CFG_SWBUF_CSAVE */
|
---|
| 1081 |
|
---|
| 1082 | if (!IS_PTR_DEFINED(cep->sbuf)) {
|
---|
| 1083 |
|
---|
| 1084 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
| 1085 |
|
---|
| 1086 | /* ã¿ã¤ã ã¢ã¦ãããã§ãã¯ããã*/
|
---|
| 1087 | if (tmout == TMO_NBLK) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
| 1088 | if (!IS_PTR_DEFINED(cep->callback))
|
---|
| 1089 | error = E_OBJ;
|
---|
| 1090 | else {
|
---|
| 1091 | error = E_OBJ;
|
---|
| 1092 |
|
---|
| 1093 | /* ã³ã¼ã«ããã¯é¢æ°ãå¼ã³åºãã*/
|
---|
| 1094 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
| 1095 | (*cep->callback)(GET_TCP_CEPID(cep), fncd, (void*)error);
|
---|
| 1096 | #else
|
---|
| 1097 | (*cep->callback)(GET_TCP_CEPID(cep), fncd, (void*)&error);
|
---|
| 1098 | #endif
|
---|
| 1099 | error = E_WBLK;
|
---|
| 1100 | }
|
---|
| 1101 | }
|
---|
| 1102 | else
|
---|
| 1103 |
|
---|
| 1104 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
| 1105 |
|
---|
| 1106 | error = E_OBJ;
|
---|
| 1107 | }
|
---|
| 1108 | else
|
---|
| 1109 | error = E_OK;
|
---|
| 1110 |
|
---|
| 1111 | #endif /* of #ifdef TCP_CFG_SWBUF_CSAVE */
|
---|
| 1112 |
|
---|
| 1113 | }
|
---|
| 1114 |
|
---|
| 1115 | return error;
|
---|
| 1116 | }
|
---|
| 1117 |
|
---|
| 1118 | /*
|
---|
| 1119 | * tcp_can_recv_more -- åä¿¡ã§ããããé信端ç¹ã®ç¶æ
|
---|
| 1120 | ãè¦ãã
|
---|
| 1121 | *
|
---|
| 1122 | * 注æ: æ»ãå¤
|
---|
| 1123 | *
|
---|
| 1124 | * E_OK åä¿¡å¯è½
|
---|
| 1125 | * E_OBJ ç¸æããåæãããããã¨ã©ã¼ãçºçããã
|
---|
| 1126 | */
|
---|
| 1127 |
|
---|
| 1128 | ER
|
---|
| 1129 | tcp_can_recv_more (ER *error, T_TCP_CEP *cep, FN fncd, TMO tmout)
|
---|
| 1130 | {
|
---|
| 1131 | /*
|
---|
| 1132 | * åä¿¡ã§ããããfsm_state ãè¦ããåä¿¡ã§ããªãå ´åã¯
|
---|
| 1133 | * é·ã 0ãã¾ãã¯ã¨ã©ã¼ãè¿ãã
|
---|
| 1134 | */
|
---|
| 1135 | if (!TCP_FSM_CAN_RECV_MORE(cep->fsm_state) &&
|
---|
| 1136 | cep->rwbuf_count == 0 && cep->reassq == NULL) {
|
---|
| 1137 | *error = cep->error;
|
---|
| 1138 |
|
---|
| 1139 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
| 1140 |
|
---|
| 1141 | /* ã¿ã¤ã ã¢ã¦ãããã§ãã¯ããã*/
|
---|
| 1142 | if (tmout == TMO_NBLK) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
| 1143 |
|
---|
| 1144 | if (!IS_PTR_DEFINED(cep->callback))
|
---|
| 1145 | *error = E_OBJ;
|
---|
| 1146 | else {
|
---|
| 1147 | /* ã³ã¼ã«ããã¯é¢æ°ãå¼ã³åºãã*/
|
---|
| 1148 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
| 1149 | (*cep->callback)(GET_TCP_CEPID(cep), fncd, (void*)*error);
|
---|
| 1150 | #else
|
---|
| 1151 | (*cep->callback)(GET_TCP_CEPID(cep), fncd, (void*)error);
|
---|
| 1152 | #endif
|
---|
| 1153 | *error = E_WBLK;
|
---|
| 1154 | }
|
---|
| 1155 | }
|
---|
| 1156 |
|
---|
| 1157 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
| 1158 |
|
---|
| 1159 | /*
|
---|
| 1160 | * é信端ç¹ãããã¯ãã¦ã
|
---|
| 1161 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 1162 | */
|
---|
| 1163 | syscall(wai_sem(cep->semid_lock));
|
---|
| 1164 | TCP_FREE_RWBUFQ(cep);
|
---|
| 1165 | syscall(sig_sem(cep->semid_lock));
|
---|
| 1166 |
|
---|
| 1167 | return E_OBJ;
|
---|
| 1168 | }
|
---|
| 1169 | else {
|
---|
| 1170 |
|
---|
| 1171 | #ifndef TCP_CFG_RWBUF_CSAVE
|
---|
| 1172 |
|
---|
| 1173 | if (!IS_PTR_DEFINED(cep->rbuf)) {
|
---|
| 1174 |
|
---|
| 1175 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
| 1176 |
|
---|
| 1177 | /* ã¿ã¤ã ã¢ã¦ãããã§ãã¯ããã*/
|
---|
| 1178 | if (tmout == TMO_NBLK) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
| 1179 | if (!IS_PTR_DEFINED(cep->callback))
|
---|
| 1180 | *error = E_OBJ;
|
---|
| 1181 | else {
|
---|
| 1182 | *error = E_OBJ;
|
---|
| 1183 |
|
---|
| 1184 | /* ã³ã¼ã«ããã¯é¢æ°ãå¼ã³åºãã*/
|
---|
| 1185 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
| 1186 | (*cep->callback)(GET_TCP_CEPID(cep), fncd, (void*)*error);
|
---|
| 1187 | #else
|
---|
| 1188 | (*cep->callback)(GET_TCP_CEPID(cep), fncd, (void*)error);
|
---|
| 1189 | #endif
|
---|
| 1190 | *error = E_WBLK;
|
---|
| 1191 | }
|
---|
| 1192 | }
|
---|
| 1193 | else
|
---|
| 1194 |
|
---|
| 1195 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
| 1196 |
|
---|
| 1197 | *error = E_OBJ;
|
---|
| 1198 |
|
---|
| 1199 | return E_OBJ;
|
---|
| 1200 | }
|
---|
| 1201 |
|
---|
| 1202 | #endif /* of #ifndef TCP_CFG_RWBUF_CSAVE */
|
---|
| 1203 |
|
---|
| 1204 | return E_OK;
|
---|
| 1205 | }
|
---|
| 1206 | }
|
---|
| 1207 |
|
---|
| 1208 | /*
|
---|
| 1209 | * tcp_wait_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãå
|
---|
| 1210 | ¥ãã®ãå¾
|
---|
| 1211 | ã¤ã
|
---|
| 1212 | */
|
---|
| 1213 |
|
---|
| 1214 | ER
|
---|
| 1215 | tcp_wait_rwbuf (T_TCP_CEP *cep, TMO tmout)
|
---|
| 1216 | {
|
---|
| 1217 | ER error;
|
---|
| 1218 | FLGPTN flag;
|
---|
| 1219 |
|
---|
| 1220 | if (cep->rwbuf_count == 0) {
|
---|
| 1221 | /* åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ããªããã°ãå
|
---|
| 1222 | ¥åãããã¾ã§å¾
|
---|
| 1223 | ã¤ã*/
|
---|
| 1224 | while (cep->rwbuf_count == 0) {
|
---|
| 1225 | if ((error = twai_flg(cep->rcv_flgid, TCP_CEP_EVT_RWBUF_READY, TWF_ORW, &flag, tmout)) != E_OK) {
|
---|
| 1226 | return error;
|
---|
| 1227 | }
|
---|
| 1228 | syscall(clr_flg(cep->rcv_flgid, (FLGPTN)(~TCP_CEP_EVT_RWBUF_READY)));
|
---|
| 1229 |
|
---|
| 1230 | /*
|
---|
| 1231 | * åä¿¡ã§ããããfsm_state ãè¦ããåä¿¡ã§ããªãç¶æ
|
---|
| 1232 | ã§ã
|
---|
| 1233 | * åä¿¡ã¦ã£ã³ããããã¡ã«æåããªãå ´åã¯çµäºããã
|
---|
| 1234 | */
|
---|
| 1235 | if (!TCP_FSM_CAN_RECV_MORE(cep->fsm_state) &&
|
---|
| 1236 | cep->rwbuf_count == 0 && cep->reassq == NULL) {
|
---|
| 1237 |
|
---|
| 1238 | /*
|
---|
| 1239 | * é信端ç¹ãããã¯ãã¦ã
|
---|
| 1240 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 1241 | */
|
---|
| 1242 | syscall(wai_sem(cep->semid_lock));
|
---|
| 1243 | TCP_FREE_RWBUFQ(cep);
|
---|
| 1244 | syscall(sig_sem(cep->semid_lock));
|
---|
| 1245 |
|
---|
| 1246 | return cep->error;
|
---|
| 1247 | }
|
---|
| 1248 | }
|
---|
| 1249 | }
|
---|
| 1250 | else {
|
---|
| 1251 | syscall(clr_flg(cep->rcv_flgid, (FLGPTN)(~TCP_CEP_EVT_RWBUF_READY)));
|
---|
| 1252 | }
|
---|
| 1253 |
|
---|
| 1254 | return E_OK;
|
---|
| 1255 | }
|
---|
| 1256 |
|
---|
| 1257 | /*
|
---|
| 1258 | * tcp_move_ra2rw -- åä¿¡åæ§æãã¥ã¼ã§åæ§æããã»ã°ã¡ã³ããåä¿¡ã¦ã£ã³ããããã¡ã«æ¸ãè¾¼ãã
|
---|
| 1259 | */
|
---|
| 1260 |
|
---|
| 1261 | uint8_t
|
---|
| 1262 | tcp_move_ra2rw (T_TCP_CEP *cep, uint8_t flags)
|
---|
| 1263 | {
|
---|
| 1264 | T_NET_BUF *q;
|
---|
| 1265 | T_TCP_Q_HDR *qhdr;
|
---|
| 1266 |
|
---|
| 1267 | /*
|
---|
| 1268 | * åä¿¡ãã¼ã¿ãåä¿¡ã¦ã£ã³ããããã¡ã«æ¸ãè¾¼ã¿ã
|
---|
| 1269 | * rcv_nxt ãå®äºãã SEQ ã ãé²ããã
|
---|
| 1270 | */
|
---|
| 1271 | if (TCP_FSM_HAVE_ESTABLISHED(cep->fsm_state)) {
|
---|
| 1272 | while (cep->reassq != NULL) {
|
---|
| 1273 | q = cep->reassq;
|
---|
| 1274 | qhdr = GET_TCP_Q_HDR(q, GET_IP_TCP_Q_HDR_OFFSET(q));
|
---|
| 1275 | if (qhdr->seq != cep->rcv_nxt)
|
---|
| 1276 | break;
|
---|
| 1277 |
|
---|
| 1278 | /* 次ã®ã»ã°ã¡ã³ãã«é²ãã*/
|
---|
| 1279 | cep->reassq = qhdr->next;
|
---|
| 1280 |
|
---|
| 1281 | /* FIN ãã©ã°ã®ã¿æ®ãã*/
|
---|
| 1282 | flags &= TCP_FLG_FIN;
|
---|
| 1283 |
|
---|
| 1284 | /* ãã¼ã¿ãåä¿¡ã¦ã£ã³ããããã¡ã«æ¸ãè¾¼ãã*/
|
---|
| 1285 | TCP_WRITE_RWBUF(cep, q, (uint_t)(GET_IP_TCP_Q_HDR_OFFSET(q)));
|
---|
| 1286 | }
|
---|
| 1287 | }
|
---|
| 1288 | if (cep->reassq != NULL) {
|
---|
| 1289 | cep->flags |= TCP_CEP_FLG_ACK_NOW;
|
---|
| 1290 | flags &= ~TCP_FLG_FIN;
|
---|
| 1291 | }
|
---|
| 1292 | return flags;
|
---|
| 1293 | }
|
---|
| 1294 |
|
---|
| 1295 | /*
|
---|
| 1296 | * tcp_write_raque -- åä¿¡ã»ã°ã¡ã³ããåæ§æãã¦ãåä¿¡åæ§æãã¥ã¼ã«ç¹ãã
|
---|
| 1297 | */
|
---|
| 1298 |
|
---|
| 1299 | uint8_t
|
---|
| 1300 | tcp_write_raque (T_NET_BUF *input, T_TCP_CEP *cep, uint_t thoff, uint8_t flags)
|
---|
| 1301 | {
|
---|
| 1302 | T_NET_BUF *new;
|
---|
| 1303 | T_NET_BUF *p, *q, *nq;
|
---|
| 1304 | T_TCP_Q_HDR *qhdr, *inqhdr = GET_TCP_Q_HDR(input, thoff);
|
---|
| 1305 | int32_t len;
|
---|
| 1306 |
|
---|
| 1307 | /* TCP ãããã®ä½ç½®ãä¿åããã*/
|
---|
| 1308 | SET_IP_TCP_Q_HDR_OFFSET(input, thoff);
|
---|
| 1309 |
|
---|
| 1310 | /*
|
---|
| 1311 | * MAX_TCP_REALLOC_SIZE 以ä¸ã®å ´åã¯ãæ°ãã«ãããã¯ã¼ã¯ãããã¡ã
|
---|
| 1312 | * å²å½ã¦ã¦ããã¼ã¿ãã³ãã¼ããã
|
---|
| 1313 | * ãã®ã¨ããIP ã®ãªãã·ã§ã³ï¼æ¡å¼µãããï¼ã¨ TCP ã®ãªãã·ã§ã³ã¯åé¤ããã
|
---|
| 1314 | */
|
---|
| 1315 | len = IF_IP_TCP_HDR_SIZE(input) + inqhdr->slen;
|
---|
| 1316 |
|
---|
| 1317 | if (len <= MAX_TCP_REALLOC_SIZE) {
|
---|
| 1318 |
|
---|
| 1319 | /*
|
---|
| 1320 | * ãããã¯ã¼ã¯ãããã¡ã確ä¿ã§ããªãã¨ãã¯å²å½ã¦ãªãã
|
---|
| 1321 | */
|
---|
| 1322 | if (tget_net_buf(&new, (uint_t)len, TMO_TCP_GET_NET_BUF) != E_OK)
|
---|
| 1323 | new = NULL;
|
---|
| 1324 | }
|
---|
| 1325 | else
|
---|
| 1326 | new = NULL;
|
---|
| 1327 |
|
---|
| 1328 | /*
|
---|
| 1329 | * inqhdr->seq
|
---|
| 1330 | * |
|
---|
| 1331 | * |<------- inqhdr->slen ------->|
|
---|
| 1332 | * v v
|
---|
| 1333 | * +------------------------------+
|
---|
| 1334 | * | input |
|
---|
| 1335 | * +------------------------------+
|
---|
| 1336 | * ^ ^
|
---|
| 1337 | * |<----- slen ----->|
|
---|
| 1338 | * |
|
---|
| 1339 | * soff
|
---|
| 1340 | *
|
---|
| 1341 | */
|
---|
| 1342 | inqhdr->soff = 0;
|
---|
| 1343 |
|
---|
| 1344 | /*
|
---|
| 1345 | * ä»å追å ããã»ã°ã¡ã³ãããå(p)ã¨å¾(q)ã®ã»ã°ã¡ã³ããæ¢ãã
|
---|
| 1346 | *
|
---|
| 1347 | * +-------------------------+
|
---|
| 1348 | * | p |
|
---|
| 1349 | * +-------------------------+
|
---|
| 1350 | * ^ +---------------------------+
|
---|
| 1351 | * p->seq | input |
|
---|
| 1352 | * +---------------------------+
|
---|
| 1353 | * ^ +-------------------------+
|
---|
| 1354 | * inqhdr->seq | q |
|
---|
| 1355 | * +-------------------------+
|
---|
| 1356 | * ^
|
---|
| 1357 | * q->seq
|
---|
| 1358 | */
|
---|
| 1359 | for (q = cep->reassq, p = NULL; q != NULL; ) {
|
---|
| 1360 | qhdr = GET_TCP_Q_HDR(q, GET_IP_TCP_Q_HDR_OFFSET(q));
|
---|
| 1361 | if (SEQ_GT(qhdr->seq, inqhdr->seq))
|
---|
| 1362 | break;
|
---|
| 1363 | p = q;
|
---|
| 1364 | q = qhdr->next;
|
---|
| 1365 | }
|
---|
| 1366 |
|
---|
| 1367 | /*
|
---|
| 1368 | * å(p)ã®ã»ã°ã¡ã³ããããã°ãæ¢ã«ãä»åã¨åãã»ã°ã¡ã³ãã
|
---|
| 1369 | * ãããã¨ãããããã®å ´åã¯ããã®é¨åã¾ãã¯å
|
---|
| 1370 | ¨ã¦ãç ´æ£ããã
|
---|
| 1371 | *
|
---|
| 1372 | * qhdr->seq
|
---|
| 1373 | * |
|
---|
| 1374 | * |<----- qhdr->slen ------>|
|
---|
| 1375 | * v v
|
---|
| 1376 | * +-------------------------+
|
---|
| 1377 | * | p |
|
---|
| 1378 | * +-------------------------+
|
---|
| 1379 | * <--len -->
|
---|
| 1380 | * +---------------------------+
|
---|
| 1381 | * | input |
|
---|
| 1382 | * +---------------------------+
|
---|
| 1383 | * ^
|
---|
| 1384 | * inqhdr->seq
|
---|
| 1385 | */
|
---|
| 1386 | if (p != NULL) {
|
---|
| 1387 | qhdr = GET_TCP_Q_HDR(p, GET_IP_TCP_Q_HDR_OFFSET(p));
|
---|
| 1388 | len = qhdr->seq + qhdr->slen - inqhdr->seq;
|
---|
| 1389 | if (len > 0) {
|
---|
| 1390 |
|
---|
| 1391 | /*
|
---|
| 1392 | * len ãæ£ã§ããã°ãå(p) ã®ã»ã°ã¡ã³ãã¨ä»åã®
|
---|
| 1393 | * ã»ã°ã¡ã³ããéãªã£ã¦ããã
|
---|
| 1394 | */
|
---|
| 1395 | if (len >= inqhdr->slen) {
|
---|
| 1396 |
|
---|
| 1397 | /*
|
---|
| 1398 | * len ãä»åã®ã»ã°ã¡ã³ãã¨åããªã
|
---|
| 1399 | * ã¾ã£ããåãã»ã°ã¡ã³ããªã®ã§ä½ãããªãã
|
---|
| 1400 | */
|
---|
| 1401 | if (new != NULL) {
|
---|
| 1402 | syscall(rel_net_buf(new));
|
---|
| 1403 | }
|
---|
| 1404 |
|
---|
| 1405 | syscall(rel_net_buf(input));
|
---|
| 1406 | return flags;
|
---|
| 1407 | }
|
---|
| 1408 |
|
---|
| 1409 | /*
|
---|
| 1410 | * 追å ããã»ã°ã¡ã³ãã® SDU ã len ååã«è©°ããã
|
---|
| 1411 | */
|
---|
| 1412 | inqhdr->seq += len;
|
---|
| 1413 | inqhdr->soff += (uint16_t)len;
|
---|
| 1414 | inqhdr->slen -= (uint16_t)len;
|
---|
| 1415 | }
|
---|
| 1416 | }
|
---|
| 1417 |
|
---|
| 1418 | /*
|
---|
| 1419 | * ãã¥ã¼ã«ã¤ãªãåã«ãæ°ãããããã¯ã¼ã¯ãããã¡ã«ãã¼ã¿ã移ãã
|
---|
| 1420 | * TCP ã®ãªãã·ã§ã³ã¯åé¤ããã
|
---|
| 1421 | */
|
---|
| 1422 | if (new != NULL) {
|
---|
| 1423 | memcpy(new->buf, input->buf, (size_t)(thoff + TCP_HDR_SIZE));
|
---|
| 1424 | memcpy((uint8_t*)GET_TCP_HDR(new, thoff) + TCP_HDR_SIZE,
|
---|
| 1425 | GET_TCP_SDU(input, thoff), (size_t)(inqhdr->slen));
|
---|
| 1426 | syscall(rel_net_buf(input));
|
---|
| 1427 | input = new;
|
---|
| 1428 | inqhdr = GET_TCP_Q_HDR(input, thoff);
|
---|
| 1429 | inqhdr->doff = (uint8_t)TCP_MAKE_DATA_OFF(TCP_HDR_SIZE);
|
---|
| 1430 | }
|
---|
| 1431 |
|
---|
| 1432 | /*
|
---|
| 1433 | * éãªãå¾(q)ã®ã»ã°ã¡ã³ãã調æ´ããã
|
---|
| 1434 | *
|
---|
| 1435 | * inqhdr->seq
|
---|
| 1436 | * |
|
---|
| 1437 | * |<----- inqhdr->slen ---->|
|
---|
| 1438 | * v v
|
---|
| 1439 | * +-------------------------+
|
---|
| 1440 | * | input |
|
---|
| 1441 | * +-------------------------+
|
---|
| 1442 | * <--len -->
|
---|
| 1443 | * +---------------------------+
|
---|
| 1444 | * | q |
|
---|
| 1445 | * +---------------------------+
|
---|
| 1446 | * ^
|
---|
| 1447 | * qhdr->seq
|
---|
| 1448 | */
|
---|
| 1449 | while (q != NULL) {
|
---|
| 1450 | qhdr = GET_TCP_Q_HDR(q, GET_IP_TCP_Q_HDR_OFFSET(q));
|
---|
| 1451 | len = inqhdr->seq + inqhdr->slen - qhdr->seq;
|
---|
| 1452 | if (len <= 0)
|
---|
| 1453 | /* len ãè² ãªãéãªã£ã¦ããªãã*/
|
---|
| 1454 | break;
|
---|
| 1455 | else if (len < qhdr->slen) {
|
---|
| 1456 |
|
---|
| 1457 | /*
|
---|
| 1458 | * å¾ãã§éãªã£ã¦ããã»ã°ã¡ã³ãã® SDU ã len ååã«è©°ããã
|
---|
| 1459 | *
|
---|
| 1460 | * inqhdr->seq
|
---|
| 1461 | * |
|
---|
| 1462 | * |<----- inqhdr->slen ---->|
|
---|
| 1463 | * v v
|
---|
| 1464 | * +-------------------------+
|
---|
| 1465 | * | input |
|
---|
| 1466 | * +-------------------------+
|
---|
| 1467 | * <--len -->
|
---|
| 1468 | * +------+---------------------------+
|
---|
| 1469 | * | | q |
|
---|
| 1470 | * +------+---------------------------+
|
---|
| 1471 | * ^--------->
|
---|
| 1472 | * qhdr->seq
|
---|
| 1473 | * qhdr->soff
|
---|
| 1474 | */
|
---|
| 1475 | qhdr->seq += len;
|
---|
| 1476 | qhdr->soff += (uint16_t)len;
|
---|
| 1477 | qhdr->slen -= (uint16_t)len;
|
---|
| 1478 | break;
|
---|
| 1479 | }
|
---|
| 1480 | nq = qhdr->next;
|
---|
| 1481 | if (p)
|
---|
| 1482 | GET_TCP_Q_HDR(p, GET_IP_TCP_Q_HDR_OFFSET(p))->next = nq;
|
---|
| 1483 | else
|
---|
| 1484 | cep->reassq = nq;
|
---|
| 1485 | syscall(rel_net_buf(q));
|
---|
| 1486 | q = nq;
|
---|
| 1487 | }
|
---|
| 1488 |
|
---|
| 1489 | if (p == NULL) {
|
---|
| 1490 | inqhdr->next = cep->reassq;
|
---|
| 1491 | cep->reassq = input;
|
---|
| 1492 | }
|
---|
| 1493 | else {
|
---|
| 1494 | inqhdr->next = GET_TCP_Q_HDR(p, GET_IP_TCP_Q_HDR_OFFSET(p))->next;
|
---|
| 1495 | GET_TCP_Q_HDR(p, GET_IP_TCP_Q_HDR_OFFSET(p))->next = input;
|
---|
| 1496 | }
|
---|
| 1497 |
|
---|
| 1498 | return tcp_move_ra2rw(cep, flags);
|
---|
| 1499 | }
|
---|
| 1500 |
|
---|
| 1501 | /*
|
---|
| 1502 | * tcp_rexmt_val -- åéã¿ã¤ã ã¢ã¦ãå¤ãè¿ãã
|
---|
| 1503 | */
|
---|
| 1504 |
|
---|
| 1505 | T_TCP_TIME
|
---|
| 1506 | tcp_rexmt_val (T_TCP_CEP *cep)
|
---|
| 1507 | {
|
---|
| 1508 | T_TCP_TIME val;
|
---|
| 1509 |
|
---|
| 1510 | val = ((cep->srtt >> (TCP_SRTT_SHIFT - TCP_DELTA_SHIFT)) + cep->rttvar) >> TCP_DELTA_SHIFT;
|
---|
| 1511 | if (val < TCP_TVAL_MIN)
|
---|
| 1512 | return TCP_TVAL_MIN;
|
---|
| 1513 | else
|
---|
| 1514 | return val;
|
---|
| 1515 | }
|
---|
| 1516 |
|
---|
| 1517 | /*
|
---|
| 1518 | * tcp_init_cep -- é信端ç¹ãåæåããã
|
---|
| 1519 | */
|
---|
| 1520 |
|
---|
| 1521 | void
|
---|
| 1522 | tcp_init_cep (T_TCP_CEP *cep)
|
---|
| 1523 | {
|
---|
| 1524 |
|
---|
| 1525 | #ifdef TCP_CFG_RWBUF_CSAVE
|
---|
| 1526 | /*
|
---|
| 1527 | * åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãæå¹ã«ããå ´åã
|
---|
| 1528 | * åä¿¡ã¦ã£ã³ããããã¡ãå
|
---|
| 1529 | ¨ã¦è§£æ¾ãããªããã¨ãããã®ã§ã
|
---|
| 1530 | * ããã§è§£æ¾ããã
|
---|
| 1531 | */
|
---|
| 1532 | if (cep->rwbufq != NULL) {
|
---|
| 1533 | cep->rwbuf_count = 0;
|
---|
| 1534 | TCP_FREE_RWBUFQ(cep);
|
---|
| 1535 | }
|
---|
| 1536 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE */
|
---|
| 1537 |
|
---|
| 1538 |
|
---|
| 1539 | memset((uint8_t*)cep + offsetof(T_TCP_CEP, timer), 0,
|
---|
| 1540 | sizeof(T_TCP_CEP) - offsetof(T_TCP_CEP, timer));
|
---|
| 1541 |
|
---|
| 1542 | cep->sbuf_rptr = cep->sbuf_wptr = cep->sbuf;
|
---|
| 1543 | cep->rbuf_rptr = cep->rbuf_wptr = cep->rbuf;
|
---|
| 1544 |
|
---|
| 1545 | cep->maxseg = DEF_TCP_SND_SEG; /* éä¿¡æ大ã»ã°ã¡ã³ããµã¤ãº */
|
---|
| 1546 | cep->srtt = TCP_TVAL_SRTT_BASE; /* æ»ãããªç§»åå¹³å */
|
---|
| 1547 | cep->rttvar = ((TCP_TVAL_RTO_BASE - TCP_TVAL_SRTT_BASE) << TCP_RTTVAR_SHIFT) / 4;
|
---|
| 1548 | /* æ»ãããªåæ£ */
|
---|
| 1549 | cep->rxtcur = TCP_TVAL_RTO_BASE; /* ç¾å¨ã®åéå¤ */
|
---|
| 1550 | cep->snd_cwnd = MAX_TCP_WIN_SIZE; /* 輻輳ã¦ã£ã³ããµã¤ãº */
|
---|
| 1551 | cep->snd_ssthresh= MAX_TCP_WIN_SIZE; /* 輻輳ã¦ã£ã³ããµã¤ãº(snd_cwnd)ã® å¶éå¤ */
|
---|
| 1552 |
|
---|
| 1553 | /*
|
---|
| 1554 | * 以ä¸ã«é¢ä¿ããªããã©ã°ãã¯ãªã¢ã¼ããã
|
---|
| 1555 | * ã»éåä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½
|
---|
| 1556 | * ã»åçãªé信端ç¹ã®çæã»åé¤æ©è½
|
---|
| 1557 | * ã»é信端ç¹ã®ãããã¯ã¼ã¯å±¤ãããã³ã«
|
---|
| 1558 | */
|
---|
| 1559 | cep->flags &= TCP_CEP_FLG_NOT_CLEAR;
|
---|
| 1560 |
|
---|
| 1561 | /* ã»ããã©ãåæåããã*/
|
---|
| 1562 | sig_sem(cep->semid_lock);
|
---|
| 1563 |
|
---|
| 1564 | /* ãã©ã°ãåæåããã*/
|
---|
| 1565 | syscall(set_flg(cep->snd_flgid, TCP_CEP_EVT_SWBUF_READY));
|
---|
| 1566 | syscall(clr_flg(cep->rcv_flgid, TCP_CEP_EVT_RWBUF_READY));
|
---|
| 1567 | }
|
---|
| 1568 |
|
---|
| 1569 | /*
|
---|
| 1570 | * tcp_notify -- ICMP ã¨ã©ã¼ã®å¦ç
|
---|
| 1571 | */
|
---|
| 1572 |
|
---|
| 1573 | void
|
---|
| 1574 | tcp_notify (T_NET_BUF *input, ER error)
|
---|
| 1575 | {
|
---|
| 1576 | T_TCP_CEP *cep;
|
---|
| 1577 |
|
---|
| 1578 | if ((cep = tcp_find_cep(input, GET_TCP_HDR_OFFSET(input))) != NULL) {
|
---|
| 1579 |
|
---|
| 1580 | /*
|
---|
| 1581 | * ã³ãã¯ã·ã§ã³éè¨æ¸ã§ããã¹ãå°éä¸è½ã¨ã©ã¼ã®å ´åã¯ã
|
---|
| 1582 | * åéã«ããå¦çããã
|
---|
| 1583 | */
|
---|
| 1584 | if (cep->fsm_state == TCP_FSM_ESTABLISHED &&
|
---|
| 1585 | (error == EV_NURCH || error == EV_HURCH || error == EV_HDOWN))
|
---|
| 1586 | return;
|
---|
| 1587 |
|
---|
| 1588 | /*
|
---|
| 1589 | * ã³ãã¯ã·ã§ã³éè¨ä¸ãåãã¨ã©ã¼ãä½åº¦ãåä¿¡ããå ´åã¯ã
|
---|
| 1590 | * å¾
|
---|
| 1591 | ã¡ç¶æ
|
---|
| 1592 | ã解é¤ãã対å¿ããé¢æ°ã«ã¨ã©ã¼ãè¿ãããã
|
---|
| 1593 | */
|
---|
| 1594 | if (cep->fsm_state < TCP_FSM_ESTABLISHED && cep->rxtshift > 3 && cep->net_error != E_OK) {
|
---|
| 1595 | cep->error = E_CLS;
|
---|
| 1596 | tcp_close(cep);
|
---|
| 1597 | }
|
---|
| 1598 | else {
|
---|
| 1599 | cep->net_error = error;
|
---|
| 1600 |
|
---|
| 1601 | /* éä¿¡ãæ示ããã*/
|
---|
| 1602 | cep->flags |= TCP_CEP_FLG_POST_OUTPUT;
|
---|
| 1603 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
| 1604 | }
|
---|
| 1605 | }
|
---|
| 1606 | }
|
---|
| 1607 |
|
---|
| 1608 | /*
|
---|
| 1609 | * tcp_lock_cep -- TCP é信端ç¹ãããã¯ããã
|
---|
| 1610 | */
|
---|
| 1611 |
|
---|
| 1612 | ER
|
---|
| 1613 | tcp_lock_cep (ID cepid, T_TCP_CEP **p_cep, FN tfn)
|
---|
| 1614 | {
|
---|
| 1615 | T_TCP_CEP *cep;
|
---|
| 1616 | ER error = E_OK;
|
---|
| 1617 |
|
---|
| 1618 | *p_cep = NULL;
|
---|
| 1619 |
|
---|
| 1620 | /* TCP éä¿¡ç«¯ç¹ ID ããã§ãã¯ããã*/
|
---|
| 1621 | if (!VALID_TCP_CEPID(cepid))
|
---|
| 1622 | return E_ID;
|
---|
| 1623 |
|
---|
| 1624 | /* TCP é信端ç¹ãå¾ãã*/
|
---|
| 1625 | cep = GET_TCP_CEP(cepid);
|
---|
| 1626 |
|
---|
| 1627 | /* TCP é信端ç¹ãããã¯ããã*/
|
---|
| 1628 | syscall(wai_sem(cep->semid_lock));
|
---|
| 1629 |
|
---|
| 1630 | /* TCP é信端ç¹ããã§ãã¯ããã*/
|
---|
| 1631 | if (!VALID_TCP_CEP(cep)) {
|
---|
| 1632 | syscall(sig_sem(cep->semid_lock));
|
---|
| 1633 | return E_NOEXS;
|
---|
| 1634 | }
|
---|
| 1635 |
|
---|
| 1636 | /*
|
---|
| 1637 | * API æ©è½ã³ã¼ãã¨ã¿ã¹ã¯èå¥åãè¨é²ããã
|
---|
| 1638 | * ãã§ã«è¨é²ããã¦ããã°ããã³ãã£ã³ã°ä¸ãªã®ã§ã¨ã©ã¼
|
---|
| 1639 | */
|
---|
| 1640 | if (IS_TFN_TCP_RCV(tfn)) {
|
---|
| 1641 | if (cep->rcv_tfn != TFN_TCP_UNDEF ||
|
---|
| 1642 | (tfn == TFN_TCP_ACP_CEP && cep->snd_tfn == TFN_TCP_CON_CEP))
|
---|
| 1643 | error = E_OBJ;
|
---|
| 1644 | else {
|
---|
| 1645 | get_tid(&(cep->rcv_tskid));
|
---|
| 1646 | cep->rcv_tfn = tfn;
|
---|
| 1647 | }
|
---|
| 1648 | }
|
---|
| 1649 | else {
|
---|
| 1650 | if (cep->snd_tfn != TFN_TCP_UNDEF ||
|
---|
| 1651 | (tfn == TFN_TCP_CON_CEP && cep->rcv_tfn == TFN_TCP_ACP_CEP) ||
|
---|
| 1652 | (tfn == TFN_TCP_CON_CEP && cep->rcv_tfn == TFN_TCP_CLS_CEP))
|
---|
| 1653 | error = E_OBJ;
|
---|
| 1654 | else {
|
---|
| 1655 | get_tid(&(cep->snd_tskid));
|
---|
| 1656 | cep->snd_tfn = tfn;
|
---|
| 1657 | }
|
---|
| 1658 | }
|
---|
| 1659 |
|
---|
| 1660 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
| 1661 | syscall(sig_sem(cep->semid_lock));
|
---|
| 1662 |
|
---|
| 1663 | *p_cep = cep;
|
---|
| 1664 | return error;
|
---|
| 1665 | }
|
---|
| 1666 |
|
---|
| 1667 | #ifdef TCP_CFG_TRACE
|
---|
| 1668 |
|
---|
| 1669 | /*
|
---|
| 1670 | * ãã¬ã¼ã¹åºåã«ç¨ããã·ãªã¢ã«ãã¼ãçªå·
|
---|
| 1671 | */
|
---|
| 1672 |
|
---|
| 1673 | #ifndef CONSOLE_PORTID
|
---|
| 1674 | #define CONSOLE_PORTID LOGTASK_PORTID
|
---|
| 1675 | #endif
|
---|
| 1676 |
|
---|
| 1677 | /*
|
---|
| 1678 | * ã³ãã¯ã·ã§ã³ã®ç¶æ
|
---|
| 1679 |
|
---|
| 1680 | */
|
---|
| 1681 |
|
---|
| 1682 | static const char tcp_strfsm[][3] = {
|
---|
| 1683 | { 'C', 'D', '\0' },
|
---|
| 1684 | { 'L', 'I', '\0' },
|
---|
| 1685 | { 'S', 'S', '\0' },
|
---|
| 1686 | { 'S', 'R', '\0' },
|
---|
| 1687 | { 'E', 'S', '\0' },
|
---|
| 1688 | { 'C', 'W', '\0' },
|
---|
| 1689 | { 'F', '1', '\0' },
|
---|
| 1690 | { 'C', 'G', '\0' },
|
---|
| 1691 | { 'L', 'A', '\0' },
|
---|
| 1692 | { 'F', '2', '\0' },
|
---|
| 1693 | { 'T', 'W', '\0' },
|
---|
| 1694 | };
|
---|
| 1695 |
|
---|
| 1696 | /*
|
---|
| 1697 | * trace_putchar -- ã·ãªã¢ã«ãã¼ãã¸ã®æååºå
|
---|
| 1698 | */
|
---|
| 1699 |
|
---|
| 1700 | static void
|
---|
| 1701 | trace_putchar (ID portid, char ch)
|
---|
| 1702 | {
|
---|
| 1703 | serial_wri_dat(portid, &ch, 1);
|
---|
| 1704 | /*cpu_putc(ch);*/
|
---|
| 1705 | }
|
---|
| 1706 |
|
---|
| 1707 | /*
|
---|
| 1708 | * ã·ãªã¢ã«ãã¼ãã¸ã®æ¸å¼ä»æåååºåã©ã¤ãã©ãª
|
---|
| 1709 | */
|
---|
| 1710 |
|
---|
| 1711 | /*
|
---|
| 1712 | * æ°å¤å¤æã®ããã®å¤æ表
|
---|
| 1713 | */
|
---|
| 1714 |
|
---|
| 1715 | static const char radhex[] = "0123456789abcdef";
|
---|
| 1716 | static const char radHEX[] = "0123456789ABCDEF";
|
---|
| 1717 |
|
---|
| 1718 | /*
|
---|
| 1719 | * convert -- trace_printf ã®æ°å¤å¤æ
|
---|
| 1720 | */
|
---|
| 1721 |
|
---|
| 1722 | static int_t
|
---|
| 1723 | convert (ID portid, long_t val, int_t radix,
|
---|
| 1724 | const char *radchar, int_t width, bool_t minus, char padchar)
|
---|
| 1725 | {
|
---|
| 1726 | char digits[24];
|
---|
| 1727 | int_t ix, pad, pchars;
|
---|
| 1728 |
|
---|
| 1729 | ix = 0;
|
---|
| 1730 | do {
|
---|
| 1731 | if (minus)
|
---|
| 1732 | digits[ix ++] = radchar[val % radix];
|
---|
| 1733 | else
|
---|
| 1734 | digits[ix ++] = radchar[(ulong_t)val % radix];
|
---|
| 1735 | val /= radix;
|
---|
| 1736 | } while (val != 0);
|
---|
| 1737 |
|
---|
| 1738 | if (minus)
|
---|
| 1739 | digits[ix ++] = '-';
|
---|
| 1740 |
|
---|
| 1741 | if (width > ix)
|
---|
| 1742 | pchars = width;
|
---|
| 1743 | else
|
---|
| 1744 | pchars = ix;
|
---|
| 1745 |
|
---|
| 1746 | for (pad = ix; pad < width; pad ++)
|
---|
| 1747 | trace_putchar(portid, padchar);
|
---|
| 1748 |
|
---|
| 1749 | while (ix -- > 0)
|
---|
| 1750 | trace_putchar(portid, digits[ix]);
|
---|
| 1751 |
|
---|
| 1752 | return pchars;
|
---|
| 1753 | }
|
---|
| 1754 |
|
---|
| 1755 | /*
|
---|
| 1756 | * trace_printf -- ã·ãªã¢ã«ãã¼ãã¸ã®æ¸å¼ä»æåååºå
|
---|
| 1757 | */
|
---|
| 1758 |
|
---|
| 1759 | static void
|
---|
| 1760 | trace_printf (ID portid, const char *fmt, ...)
|
---|
| 1761 | {
|
---|
| 1762 | va_list ap;
|
---|
| 1763 | ulong_t val;
|
---|
| 1764 | char padchar, *str;
|
---|
| 1765 | int_t ch, width, longflag;
|
---|
| 1766 |
|
---|
| 1767 | va_start(ap, fmt);
|
---|
| 1768 | while ((ch = *fmt ++) != '\0') {
|
---|
| 1769 | if (ch != '%') { /* æ¸å¼æå®ä»¥å¤ */
|
---|
| 1770 | trace_putchar(portid, (char)ch);
|
---|
| 1771 | continue;
|
---|
| 1772 | }
|
---|
| 1773 |
|
---|
| 1774 | width = longflag = 0;
|
---|
| 1775 | padchar = ' ';
|
---|
| 1776 | if ((ch = *fmt ++) == '0') { /* ä¸ä½æ¡ã® 0 */
|
---|
| 1777 | padchar = '0';
|
---|
| 1778 | ch = *fmt ++;
|
---|
| 1779 | }
|
---|
| 1780 |
|
---|
| 1781 | while ('0' <= ch && ch <= '9') { /* åºåå¹
|
---|
| 1782 | */
|
---|
| 1783 | width = width * 10 + ch - '0';
|
---|
| 1784 | ch = *fmt ++;
|
---|
| 1785 | }
|
---|
| 1786 |
|
---|
| 1787 | while (ch == 'l') { /* long (long) ã®æå® */
|
---|
| 1788 | longflag ++;
|
---|
| 1789 | ch = *fmt ++;
|
---|
| 1790 | }
|
---|
| 1791 |
|
---|
| 1792 | switch (ch) {
|
---|
| 1793 | case 'd':
|
---|
| 1794 | val = longflag ? (ulong_t)va_arg(ap, long_t)
|
---|
| 1795 | : (ulong_t)va_arg(ap, int_t);
|
---|
| 1796 | if (val >= 0)
|
---|
| 1797 | convert(portid, val, 10, radhex, width, false, padchar);
|
---|
| 1798 | else
|
---|
| 1799 | convert(portid, -val, 10, radhex, width, true, padchar);
|
---|
| 1800 | break;
|
---|
| 1801 |
|
---|
| 1802 | case 'u':
|
---|
| 1803 | val = longflag ? (ulong_t)va_arg(ap, ulong_t)
|
---|
| 1804 | : (ulong_t)va_arg(ap, uint_t);
|
---|
| 1805 | convert(portid, val, 10, radhex, width, false, padchar);
|
---|
| 1806 | break;
|
---|
| 1807 |
|
---|
| 1808 | case 'x':
|
---|
| 1809 | val = longflag ? (ulong_t)va_arg(ap, ulong_t)
|
---|
| 1810 | : (ulong_t)va_arg(ap, uint_t);
|
---|
| 1811 | convert(portid, val, 16, radhex, width, false, padchar);
|
---|
| 1812 | break;
|
---|
| 1813 |
|
---|
| 1814 | case 'X':
|
---|
| 1815 | val = longflag ? (ulong_t)va_arg(ap, ulong_t)
|
---|
| 1816 | : (ulong_t)va_arg(ap, uint_t);
|
---|
| 1817 | convert(portid, val, 16, radHEX, width, false, padchar);
|
---|
| 1818 | break;
|
---|
| 1819 |
|
---|
| 1820 | case 'c':
|
---|
| 1821 | ch = va_arg(ap, int_t);
|
---|
| 1822 | trace_putchar(portid, (char)ch);
|
---|
| 1823 | break;
|
---|
| 1824 |
|
---|
| 1825 | case 's':
|
---|
| 1826 | str = va_arg(ap, char*);
|
---|
| 1827 | while ((ch = *str ++) != '\0')
|
---|
| 1828 | trace_putchar(portid, (char)ch);
|
---|
| 1829 | break;
|
---|
| 1830 |
|
---|
| 1831 | case '%':
|
---|
| 1832 | trace_putchar(portid, '%');
|
---|
| 1833 | break;
|
---|
| 1834 |
|
---|
| 1835 | case '0':
|
---|
| 1836 | fmt --;
|
---|
| 1837 | break;
|
---|
| 1838 |
|
---|
| 1839 | default:
|
---|
| 1840 | break;
|
---|
| 1841 | }
|
---|
| 1842 |
|
---|
| 1843 | }
|
---|
| 1844 | va_end(ap);
|
---|
| 1845 | }
|
---|
| 1846 |
|
---|
| 1847 | /*
|
---|
| 1848 | * TCP ãã©ã°æåå
|
---|
| 1849 | */
|
---|
| 1850 |
|
---|
| 1851 | static char *
|
---|
| 1852 | get_tcp_flag_str (char *buf, uint8_t flags)
|
---|
| 1853 | {
|
---|
| 1854 | static char tcp_flag_str[] = "FSRPAU";
|
---|
| 1855 |
|
---|
| 1856 | int_t bit, mask = 1;
|
---|
| 1857 |
|
---|
| 1858 | for (bit = 0; bit < sizeof(tcp_flag_str); bit ++) {
|
---|
| 1859 | buf[sizeof(tcp_flag_str) - bit - 1] = (char)((flags & mask) ? tcp_flag_str[bit] : '-');
|
---|
| 1860 | mask <<= 1;
|
---|
| 1861 | }
|
---|
| 1862 | buf[sizeof(tcp_flag_str)] = '\0';
|
---|
| 1863 | return buf;
|
---|
| 1864 | }
|
---|
| 1865 |
|
---|
| 1866 | /*
|
---|
| 1867 | * éä¿¡ TCP ãããã®ãã¬ã¼ã¹åºå
|
---|
| 1868 | */
|
---|
| 1869 |
|
---|
| 1870 | void
|
---|
| 1871 | tcp_output_trace (T_NET_BUF *output, T_TCP_CEP *cep)
|
---|
| 1872 | {
|
---|
| 1873 | SYSTIM time;
|
---|
| 1874 | T_TCP_HDR *tcph;
|
---|
| 1875 | char buf[9];
|
---|
| 1876 |
|
---|
| 1877 | if (!(TCP_CFG_TRACE_LPORTNO == TCP_PORTANY || cep->myaddr.portno == TCP_CFG_TRACE_LPORTNO) ||
|
---|
| 1878 | !(TCP_CFG_TRACE_RPORTNO == TCP_PORTANY || cep->dstaddr.portno == TCP_CFG_TRACE_RPORTNO))
|
---|
| 1879 | return;
|
---|
| 1880 |
|
---|
| 1881 | #if defined(_IP4_CFG)
|
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| 1882 |
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| 1883 | #if defined(_IP6_CFG)
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| 1884 |
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| 1885 | if (!((TCP_CFG_TRACE_IPV4_RADDR == IPV4_ADDRANY) ||
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| 1886 | ((cep->flags & TCP_CEP_FLG_IPV4) &&
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| 1887 | IN6_IS_ADDR_V4MAPPED(&cep->dstaddr.ipaddr) &&
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| 1888 | (ntohl(cep->dstaddr.ipaddr.s6_addr32[3]) == TCP_CFG_TRACE_IPV4_RADDR))))
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| 1889 | return;
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| 1890 |
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| 1891 | #else /* of #if defined(_IP6_CFG) */
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| 1892 |
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| 1893 | if (!(TCP_CFG_TRACE_IPV4_RADDR == IPV4_ADDRANY || cep->dstaddr.ipaddr == TCP_CFG_TRACE_IPV4_RADDR))
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| 1894 | return;
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| 1895 |
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| 1896 | #endif /* of #if defined(_IP6_CFG) */
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| 1897 |
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| 1898 | #endif /* of #if defined(_IP4_CFG) */
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| 1899 |
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| 1900 | syscall(wai_sem(SEM_TCP_TRACE));
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| 1901 | syscall(get_tim(&time));
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| 1902 | tcph = GET_TCP_HDR(output, GET_TCP_HDR_OFFSET(output));
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| 1903 | if (time > 99999999)
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| 1904 | trace_printf(CONSOLE_PORTID, "=O%10d", time / 1000);
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| 1905 | else
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| 1906 | trace_printf(CONSOLE_PORTID, "=O%6d.%03d", time / 1000, time % 1000);
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| 1907 | if (cep == NULL)
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| 1908 | trace_printf(CONSOLE_PORTID, "=c:-- s:-- f:--------");
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| 1909 | else
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| 1910 | trace_printf(CONSOLE_PORTID, "=c:%2d s:%s f:%08x",
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| 1911 | GET_TCP_CEPID(cep),
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| 1912 | tcp_strfsm[cep->fsm_state], cep->flags);
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| 1913 | trace_printf(CONSOLE_PORTID, ":%s", get_tcp_flag_str(buf, tcph->flags));
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| 1914 | if (cep->fsm_state >= TCP_FSM_ESTABLISHED)
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| 1915 | trace_printf(CONSOLE_PORTID, " s:%10u a:%10u",
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| 1916 | ntohl(tcph->seq) - cep->iss,
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| 1917 | ntohl(tcph->ack) - cep->irs);
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| 1918 | else
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| 1919 | trace_printf(CONSOLE_PORTID, " s:%10u a:%10u",
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| 1920 | ntohl(tcph->seq), ntohl(tcph->ack));
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| 1921 | trace_printf(CONSOLE_PORTID, " w:%5d l:%4d>\n",
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| 1922 | ntohs(tcph->win),
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| 1923 | GET_IP_SDU_SIZE(output) - TCP_HDR_LEN(tcph->doff));
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| 1924 | syscall(sig_sem(SEM_TCP_TRACE));
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| 1925 | }
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| 1926 |
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| 1927 | /*
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| 1928 | * åä¿¡ TCP ãããã®ãã¬ã¼ã¹åºå
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| 1929 | *
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| 1930 | * 注æ: TCP ãããå
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| 1931 | ã¯ããã§ã«ãã¹ããã¤ããªã¼ã
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| 1932 | */
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| 1933 |
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| 1934 | void
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| 1935 | tcp_input_trace (T_NET_BUF *input, T_TCP_CEP *cep)
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| 1936 | {
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| 1937 | SYSTIM time;
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| 1938 | T_TCP_HDR *tcph;
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| 1939 | char buf[9];
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| 1940 |
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| 1941 | if (!(TCP_CFG_TRACE_LPORTNO == TCP_PORTANY || cep->myaddr.portno == TCP_CFG_TRACE_LPORTNO) ||
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| 1942 | !(TCP_CFG_TRACE_RPORTNO == TCP_PORTANY || cep->dstaddr.portno == TCP_CFG_TRACE_RPORTNO))
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| 1943 | return;
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| 1944 |
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| 1945 | #if defined(_IP4_CFG)
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| 1946 |
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| 1947 | #if defined(_IP6_CFG)
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| 1948 |
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| 1949 | if (!((TCP_CFG_TRACE_IPV4_RADDR == IPV4_ADDRANY) ||
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| 1950 | ((cep->flags & TCP_CEP_FLG_IPV4) &&
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| 1951 | IN6_IS_ADDR_V4MAPPED(&cep->dstaddr.ipaddr) &&
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| 1952 | (ntohl(cep->dstaddr.ipaddr.s6_addr32[3]) == TCP_CFG_TRACE_IPV4_RADDR))))
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| 1953 | return;
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| 1954 |
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| 1955 | #else /* of #if defined(_IP6_CFG) */
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| 1956 |
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| 1957 | if (!(TCP_CFG_TRACE_IPV4_RADDR == IPV4_ADDRANY || cep->dstaddr.ipaddr == TCP_CFG_TRACE_IPV4_RADDR))
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| 1958 | return;
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| 1959 |
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| 1960 | #endif /* of #if defined(_IP6_CFG) */
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| 1961 |
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| 1962 | #endif /* of #if defined(_IP4_CFG) */
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| 1963 |
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| 1964 | syscall(wai_sem(SEM_TCP_TRACE));
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| 1965 | syscall(get_tim(&time));
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| 1966 | tcph = GET_TCP_HDR(input, GET_TCP_HDR_OFFSET(input));
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| 1967 | if (time > 99999999)
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| 1968 | trace_printf(CONSOLE_PORTID, "<I%10d", time / 1000);
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| 1969 | else
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| 1970 | trace_printf(CONSOLE_PORTID, "<I%6d.%03d", time / 1000, time % 1000);
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| 1971 | if (cep == NULL)
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| 1972 | trace_printf(CONSOLE_PORTID, "=c:-- s:-- f:--------");
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| 1973 | else
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| 1974 | trace_printf(CONSOLE_PORTID, "=c:%2d s:%s f:%08x",
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| 1975 | GET_TCP_CEPID(cep),
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| 1976 | tcp_strfsm[cep->fsm_state], cep->flags);
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| 1977 | trace_printf(CONSOLE_PORTID, ":%s", get_tcp_flag_str(buf, tcph->flags));
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| 1978 | if (cep->fsm_state >= TCP_FSM_SYN_RECVD)
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| 1979 | trace_printf(CONSOLE_PORTID, " a:%10u s:%10u", tcph->ack - cep->iss, tcph->seq - cep->irs);
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| 1980 | else
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| 1981 | trace_printf(CONSOLE_PORTID, " a:%10u s:%10u", tcph->ack, tcph->seq);
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| 1982 | trace_printf(CONSOLE_PORTID, " w:%5d l:%4d=\n",
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| 1983 | tcph->win, GET_IP_SDU_SIZE(input) - TCP_HDR_LEN(tcph->doff));
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| 1984 | syscall(sig_sem(SEM_TCP_TRACE));
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| 1985 | }
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| 1986 |
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| 1987 | #endif /* of #ifdef TCP_CFG_TRACE */
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| 1988 |
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| 1989 | #endif /* of #ifdef SUPPORT_TCP */
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