[388] | 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_cs.c 388 2019-05-22 11:25:18Z 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 <string.h>
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| 83 |
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| 84 | #ifdef TARGET_KERNEL_ASP
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| 85 |
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| 86 | #include <kernel.h>
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| 87 | #include <sil.h>
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| 88 | #include <t_syslog.h>
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| 89 | #include "kernel_cfg.h"
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| 90 |
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| 91 | #endif /* of #ifdef TARGET_KERNEL_ASP */
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| 92 |
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| 93 | #ifdef TARGET_KERNEL_JSP
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| 94 |
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| 95 | #include <s_services.h>
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| 96 | #include <t_services.h>
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| 97 | #include "kernel_id.h"
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| 98 |
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| 99 | #endif /* of #ifdef TARGET_KERNEL_JSP */
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| 100 |
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| 101 | #include <tinet_defs.h>
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| 102 | #include <tinet_config.h>
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| 103 |
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| 104 | #include <net/if.h>
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| 105 | #include <net/if_ppp.h>
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| 106 | #include <net/if_loop.h>
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| 107 | #include <net/ethernet.h>
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| 108 | #include <net/if_arp.h>
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| 109 | #include <net/net.h>
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| 110 | #include <net/net_endian.h>
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| 111 | #include <net/net_var.h>
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| 112 | #include <net/net_buf.h>
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| 113 | #include <net/net_timer.h>
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| 114 | #include <net/net_count.h>
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| 115 |
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| 116 | #include <netinet/in.h>
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| 117 | #include <netinet/in_var.h>
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| 118 | #include <netinet/in_itron.h>
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| 119 | #include <netinet/ip.h>
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| 120 | #include <netinet/ip_var.h>
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| 121 | #include <netinet/tcp.h>
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| 122 | #include <netinet/tcp_var.h>
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| 123 | #include <netinet/tcp_fsm.h>
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| 124 | #include <netinet/tcp_seq.h>
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| 125 | #include <netinet/tcp_timer.h>
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| 126 |
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| 127 | #ifdef SUPPORT_TCP
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| 128 |
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| 129 | #ifdef TCP_CFG_SWBUF_CSAVE
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| 130 |
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| 131 | #ifdef TCP_CFG_SWBUF_CSAVE_ONLY
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| 132 |
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| 133 | #else /* of #ifdef TCP_CFG_SWBUF_CSAVE_ONLY */
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| 134 |
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| 135 | /*
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| 136 | * TCP é信端ç¹ã®éä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãæå¹ãªå ´å
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| 137 | * ãã ããé信端ç¹ã®éä¿¡ã¦ã£ã³ããããã¡ï¼cep->sbufï¼ã®å¤ã«ããã
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| 138 | * TCP é信端ç¹æ¯ã«éä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ã使ç¨ãããã
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| 139 | * 使ç¨ããªãããåãæ¿ããã
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| 140 | */
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| 141 |
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| 142 | /*
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| 143 | * tcp_drop_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããï¼é¸æï¼ã
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| 144 | */
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| 145 |
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| 146 | void
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| 147 | tcp_drop_swbuf (T_TCP_CEP *cep, uint_t len)
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| 148 | {
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| 149 | if (IS_PTR_DEFINED(cep->sbuf))
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| 150 | tcp_drop_swbuf_ncs(cep, len);
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| 151 | else
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| 152 | tcp_drop_swbuf_cs(cep, len);
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| 153 | }
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| 154 |
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| 155 | /*
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| 156 | * tcp_write_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãï¼é¸æï¼ã
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| 157 | */
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| 158 |
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| 159 | ER_UINT
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| 160 | tcp_write_swbuf (T_TCP_CEP *cep, void *data, uint_t len)
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| 161 | {
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| 162 | if (IS_PTR_DEFINED(cep->sbuf))
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| 163 | return tcp_write_swbuf_ncs(cep, data, len);
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| 164 | else
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| 165 | return tcp_write_swbuf_cs(cep, data, len);
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| 166 | }
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| 167 |
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| 168 | /*
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| 169 | * tcp_read_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãèªã¿åºãï¼é¸æï¼ã
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| 170 | */
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| 171 |
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| 172 | void
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| 173 | tcp_read_swbuf (T_TCP_CEP *cep, T_NET_BUF *output, uint_t len, uint_t doff)
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| 174 | {
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| 175 | if (IS_PTR_DEFINED(cep->sbuf))
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| 176 | tcp_read_swbuf_ncs(cep, output, len, doff);
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| 177 | }
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| 178 |
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| 179 | /*
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| 180 | * tcp_wait_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã¨ç¸æã®åä¿¡ã¦ã£ã³ããéãã®ãå¾
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| 181 | ã¤ï¼é¸æï¼ã
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| 182 | */
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| 183 |
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| 184 | ER
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| 185 | tcp_wait_swbuf (T_TCP_CEP *cep, TMO tmout)
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| 186 | {
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| 187 | if (IS_PTR_DEFINED(cep->sbuf))
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| 188 | return tcp_wait_swbuf_ncs(cep, tmout);
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| 189 | else
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| 190 | return tcp_wait_swbuf_cs(cep, tmout);
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| 191 | }
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| 192 |
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| 193 | /*
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| 194 | * tcp_get_swbuf_addr -- éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããï¼é¸æï¼ã
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| 195 | */
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| 196 |
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| 197 | ER_UINT
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| 198 | tcp_get_swbuf_addr (T_TCP_CEP *cep, void **p_buf)
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| 199 | {
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| 200 | if (IS_PTR_DEFINED(cep->sbuf))
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| 201 | return tcp_get_swbuf_addr_ncs(cep, p_buf);
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| 202 | else
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| 203 | return tcp_get_swbuf_addr_cs(cep, p_buf);
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| 204 | }
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| 205 |
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| 206 | /*
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| 207 | * tcp_send_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ãéä¿¡å¯è½ã«ããï¼é¸æï¼ã
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| 208 | */
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| 209 |
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| 210 | void
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| 211 | tcp_send_swbuf (T_TCP_CEP *cep, uint_t len)
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| 212 | {
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| 213 | if (IS_PTR_DEFINED(cep->sbuf))
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| 214 | tcp_send_swbuf_ncs(cep, len);
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| 215 | else
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| 216 | tcp_send_swbuf_cs(cep, len);
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| 217 | }
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| 218 |
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| 219 | /*
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| 220 | * tcp_free_swbufq -- éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®è§£æ¾ãæ示ããï¼é¸æï¼ã
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| 221 | */
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| 222 |
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| 223 | void
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| 224 | tcp_free_swbufq (T_TCP_CEP *cep)
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| 225 | {
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| 226 | if (!IS_PTR_DEFINED(cep->sbuf))
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| 227 | tcp_free_swbufq_cs(cep);
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| 228 | }
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| 229 |
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| 230 | /*
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| 231 | * tcp_alloc_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ç¨ã®ãããã¯ã¼ã¯ãããã¡ã®å²ãå½ã¦ãæ示ããï¼é¸æï¼ã
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| 232 | */
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| 233 |
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| 234 | void
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| 235 | tcp_alloc_swbuf (T_TCP_CEP *cep)
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| 236 | {
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| 237 | if (!IS_PTR_DEFINED(cep->sbuf))
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| 238 | tcp_alloc_swbuf_cs(cep);
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| 239 | }
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| 240 |
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| 241 | /*
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| 242 | * tcp_is_swbuf_full -- éä¿¡ã¦ã£ã³ããããã¡ãæºæ¯ããã§ãã¯ããï¼é¸æï¼ã
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| 243 | */
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| 244 |
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| 245 | bool_t
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| 246 | tcp_is_swbuf_full (T_TCP_CEP *cep)
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| 247 | {
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| 248 | if (IS_PTR_DEFINED(cep->sbuf))
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| 249 | return tcp_is_swbuf_full_ncs(cep);
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| 250 | else
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| 251 | return tcp_is_swbuf_full_cs(cep);
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| 252 | }
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| 253 |
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| 254 | #endif /* of #ifdef TCP_CFG_SWBUF_CSAVE_ONLY */
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| 255 |
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| 256 | /*
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| 257 | * tcp_drop_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããï¼å°ç¨ï¼ã
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| 258 | */
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| 259 |
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| 260 | void
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| 261 | tcp_drop_swbuf_cs (T_TCP_CEP *cep, uint_t len)
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| 262 | {
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| 263 |
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| 264 | /*éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããã*/
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| 265 | cep->swbuf_count -= (uint16_t)len;
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| 266 |
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| 267 | /* éä¿¡æ¸ã¿ã§ãACKå¾
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| 268 | ã¡ã®æã¯ãACKå®äºã«å¤æ´ããã*/
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| 269 | if (len > 0 && (cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_SENT) {
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| 270 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_ACKED;
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| 271 | sig_sem(SEM_TCP_POST_OUTPUT);
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| 272 | }
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| 273 | }
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| 274 |
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| 275 | /*
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| 276 | * tcp_write_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãï¼å°ç¨ï¼ã
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| 277 | */
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| 278 |
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| 279 | ER_UINT
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| 280 | tcp_write_swbuf_cs (T_TCP_CEP *cep, void *data, uint_t len)
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| 281 | {
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| 282 | ER_UINT error;
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| 283 | uint_t hdr_size = IF_IP_TCP_NET_HDR_SIZE(&cep->dstaddr.ipaddr);
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| 284 |
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| 285 | /* é信端ç¹ãããã¯ããã*/
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| 286 | syscall(wai_sem(cep->semid_lock));
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| 287 |
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| 288 | if ((error = net_buf_siz(cep->swbufq)) > 0 && error >= hdr_size) {
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| 289 |
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| 290 | /*
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| 291 | * +-----------+--------+---------+---------+
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| 292 | * | Ehter HDR | IP HDR | TCP HDR | TCP SDU |
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| 293 | * +-----------+--------+---------+---------+
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| 294 | * 14 20 20 n
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| 295 | * <---------------- error --------------->
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| 296 | * ^
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| 297 | * net_buf 㧠4 ãªã¯ãããå¢çã«ã¢ã©ã¤ã³ããã¦ããã
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| 298 | *
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| 299 | * tcp_output 㨠ip_output ã§ããã§ãã¯ãµã ãè¨ç®ããã¨ãã
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| 300 | * n ã 4 ãªã¯ãããå¢çã«ãªãããã« SDU ã®å¾ãã« 0 ã
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| 301 | * ãããã£ã³ã°ããããã®åãèæ
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| 302 | ®ãã¦éä¿¡ã¦ã£ã³ããããã¡ã®
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| 303 | * 空ããµã¤ãºã 4 ãªã¯ãããå¢çã«èª¿æ´ããã
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| 304 | */
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| 305 | error = (uint_t)(((error - hdr_size) >> 2 << 2) + hdr_size);
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| 306 |
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| 307 | if (len > cep->sbufsz - cep->swbuf_count)
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| 308 | len = (uint_t)(cep->sbufsz - cep->swbuf_count);
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| 309 | if (len > (error - hdr_size))
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| 310 | len = (uint_t)(error - hdr_size);
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| 311 |
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| 312 | /* éä¿¡ã¦ã¤ã³ããµã¤ãºã«ãããµã¤ãºã調æ´ããã*/
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| 313 | if (len > cep->snd_wnd)
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| 314 | len = cep->snd_wnd;
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| 315 | if (len > cep->snd_cwnd)
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| 316 | len = cep->snd_cwnd;
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| 317 |
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| 318 | /* ç¸æã®æ大åä¿¡ã»ã°ã¡ã³ããµã¤ãº (maxseg) ãè¶
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| 319 | ããªãããã«ããã*/
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| 320 | if (len > cep->maxseg)
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| 321 | len = cep->maxseg;
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| 322 |
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| 323 | /* ãã¼ã¿ã移ãã*/
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| 324 | memcpy(cep->sbuf_wptr, (void*)((uint8_t*)data), (size_t)len);
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| 325 | cep->sbuf_wptr += len;
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| 326 | cep->swbuf_count += len;
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| 327 | error = len;
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| 328 |
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| 329 | /* ãããã¯ã¼ã¯ãããã¡é·ã¨ IP ãã¼ã¿ã°ã©ã é·ãè¨å®ããã*/
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| 330 | cep->swbufq->len = (uint16_t)(cep->swbuf_count + hdr_size);
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| 331 | SET_IP_SDU_SIZE(cep->swbufq, cep->swbuf_count + TCP_HDR_SIZE);
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| 332 |
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| 333 | /* ãã©ã°ããéä¿¡å¯è½ã«è¨å®ããã*/
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| 334 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_SEND_READY;
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| 335 | }
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| 336 |
|
---|
| 337 | else { /* éä¿¡ã¦ã¤ã³ããããã¡ãä¸æ£ */
|
---|
| 338 | syslog(LOG_WARNING, "[TCP] illegal window buff for send, CEP: %d, %4d < %4d.",
|
---|
| 339 | GET_TCP_CEPID(cep), error, hdr_size);
|
---|
| 340 |
|
---|
| 341 | /* éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã*/
|
---|
| 342 | tcp_free_swbufq_cs(cep);
|
---|
| 343 | }
|
---|
| 344 |
|
---|
| 345 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
| 346 | syscall(sig_sem(cep->semid_lock));
|
---|
| 347 |
|
---|
| 348 | return error;
|
---|
| 349 | }
|
---|
| 350 |
|
---|
| 351 | /*
|
---|
| 352 | * tcp_wait_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ã¨ç¸æã®åä¿¡ã¦ã£ã³ããéãã®ãå¾
|
---|
| 353 | ã¤ï¼å°ç¨ï¼ã
|
---|
| 354 | */
|
---|
| 355 |
|
---|
| 356 | ER
|
---|
| 357 | tcp_wait_swbuf_cs (T_TCP_CEP *cep, TMO tmout)
|
---|
| 358 | {
|
---|
| 359 | FLGPTN flag;
|
---|
| 360 | SYSTIM before, after;
|
---|
| 361 | ER error;
|
---|
| 362 | int_t win;
|
---|
| 363 |
|
---|
| 364 | /* éä¿¡ã¦ã£ã³ããããã¡ãå²å½ã¦æ¸ã¿ã§ã空ããããã°çµäºããã*/
|
---|
| 365 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_NBUF_READY &&
|
---|
| 366 | (cep->swbuf_count + IF_IP_TCP_NET_HDR_SIZE(&cep->dstaddr.ipaddr)) < net_buf_siz(cep->swbufq))
|
---|
| 367 | return E_OK;
|
---|
| 368 |
|
---|
| 369 | /* éä¿¡ä¸ã§ããã°ãçµäºããã¾ã§å¾
|
---|
| 370 | æ©ããã*/
|
---|
| 371 | while ((cep->flags & TCP_CEP_FLG_WBCS_MASK) != TCP_CEP_FLG_WBCS_FREE) {
|
---|
| 372 |
|
---|
| 373 | /* éä¿¡å¾
|
---|
| 374 | ã¡ã®æéã tmout ããæ¸ããã*/
|
---|
| 375 | if (!(tmout == TMO_POL || tmout == TMO_FEVR))
|
---|
| 376 | syscall(get_tim(&before));
|
---|
| 377 |
|
---|
| 378 | if ((error = twai_flg(cep->snd_flgid, TCP_CEP_EVT_SWBUF_READY,
|
---|
| 379 | TWF_ORW, &flag, tmout)) != E_OK)
|
---|
| 380 | return error;
|
---|
| 381 | syscall(clr_flg(cep->snd_flgid, (FLGPTN)(~TCP_CEP_EVT_SWBUF_READY)));
|
---|
| 382 |
|
---|
| 383 | /* éä¿¡å¾
|
---|
| 384 | ã¡ã®æéã tmout ããæ¸ããã*/
|
---|
| 385 | if (!(tmout == TMO_POL || tmout == TMO_FEVR)) {
|
---|
| 386 | syscall(get_tim(&after));
|
---|
| 387 | if (after - before > tmout)
|
---|
| 388 | return E_TMOUT;
|
---|
| 389 | tmout -= (TMO)(after - before);
|
---|
| 390 | }
|
---|
| 391 |
|
---|
| 392 | /*
|
---|
| 393 | * éä¿¡ã§ããããCEP ã® FSM ç¶æ
|
---|
| 394 | ãè¦ãã
|
---|
| 395 | * éä¿¡ã¦ã¤ã³ããããã¡ã空ãã¾ã§å¾
|
---|
| 396 | ã¤éã«ãéä¿¡ä¸è½ã«ãªã£ãå ´åã¯ã
|
---|
| 397 | * ã³ãã¯ã·ã§ã³ãåæããããã¨ãæå³ãã¦ããã
|
---|
| 398 | */
|
---|
| 399 | if (!TCP_FSM_CAN_SEND_MORE(cep->fsm_state))
|
---|
| 400 | return E_CLS;
|
---|
| 401 | }
|
---|
| 402 |
|
---|
| 403 | /* ç¸æã®åä¿¡ã¦ã£ã³ããéãã¦ããå ´åã¯ãéãã¾ã§å¾
|
---|
| 404 | æ©ããã*/
|
---|
| 405 | while (true) {
|
---|
| 406 |
|
---|
| 407 | /*
|
---|
| 408 | * snd_wnd: ç¸æã®åä¿¡å¯è½ã¦ã£ã³ããµã¤ãº
|
---|
| 409 | * snd_cwnd: 輻輳ã¦ã£ã³ããµã¤ãº
|
---|
| 410 | *
|
---|
| 411 | * win: ã©ã¡ããå°ããã¦ã£ã³ããµã¤ãºã«è¨å®ããã
|
---|
| 412 | */
|
---|
| 413 | win = cep->snd_wnd < cep->snd_cwnd ? cep->snd_wnd : cep->snd_cwnd;
|
---|
| 414 | if (win > 0)
|
---|
| 415 | break;
|
---|
| 416 |
|
---|
| 417 | /* éãå¾
|
---|
| 418 | ã¡ã®æéã tmout ããæ¸ããã*/
|
---|
| 419 | if (!(tmout == TMO_POL || tmout == TMO_FEVR))
|
---|
| 420 | syscall(get_tim(&before));
|
---|
| 421 |
|
---|
| 422 | if ((error = twai_flg(cep->snd_flgid, TCP_CEP_EVT_SWBUF_READY,
|
---|
| 423 | TWF_ORW, &flag, tmout)) != E_OK)
|
---|
| 424 | return error;
|
---|
| 425 | syscall(clr_flg(cep->snd_flgid, (FLGPTN)(~TCP_CEP_EVT_SWBUF_READY)));
|
---|
| 426 |
|
---|
| 427 | /* éãå¾
|
---|
| 428 | ã¡ã®æéã tmout ããæ¸ããã*/
|
---|
| 429 | if (!(tmout == TMO_POL || tmout == TMO_FEVR)) {
|
---|
| 430 | syscall(get_tim(&after));
|
---|
| 431 | if (after - before > tmout)
|
---|
| 432 | return E_TMOUT;
|
---|
| 433 | tmout -= (TMO)(after - before);
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 | /*
|
---|
| 437 | * éä¿¡ã§ããããCEP ã® FSM ç¶æ
|
---|
| 438 | ãè¦ãã
|
---|
| 439 | * éä¿¡ã¦ã¤ã³ããããã¡ã空ãã¾ã§å¾
|
---|
| 440 | ã¤éã«ãéä¿¡ä¸è½ã«ãªã£ãå ´åã¯ã
|
---|
| 441 | * ã³ãã¯ã·ã§ã³ãåæããããã¨ãæå³ãã¦ããã
|
---|
| 442 | */
|
---|
| 443 | if (!TCP_FSM_CAN_SEND_MORE(cep->fsm_state))
|
---|
| 444 | return E_CLS;
|
---|
| 445 | }
|
---|
| 446 |
|
---|
| 447 | /* ãããã¯ã¼ã¯ãããã¡ãç²å¾ããã*/
|
---|
| 448 | if ((error = tcpn_get_segment(&cep->swbufq, cep, 0,
|
---|
| 449 | TCP_CFG_SWBUF_CSAVE_MIN_SIZE,
|
---|
| 450 | TCP_CFG_SWBUF_CSAVE_MAX_SIZE,
|
---|
| 451 | NBA_SEARCH_DESCENT, tmout)) != E_OK)
|
---|
| 452 | return error;
|
---|
| 453 |
|
---|
| 454 | /* éä¿¡ã¦ã£ã³ããããã¡ãåæåããã*/
|
---|
| 455 | tcp_init_swbuf(cep);
|
---|
| 456 |
|
---|
| 457 | return E_OK;
|
---|
| 458 | }
|
---|
| 459 |
|
---|
| 460 | /*
|
---|
| 461 | * tcp_get_swbuf_addr_cs -- éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããï¼å°ç¨ï¼ã
|
---|
| 462 | */
|
---|
| 463 |
|
---|
| 464 | ER_UINT
|
---|
| 465 | tcp_get_swbuf_addr_cs (T_TCP_CEP *cep, void **p_buf)
|
---|
| 466 | {
|
---|
| 467 | ER_UINT error;
|
---|
| 468 |
|
---|
| 469 | /* é信端ç¹ãããã¯ããã*/
|
---|
| 470 | syscall(wai_sem(cep->semid_lock));
|
---|
| 471 |
|
---|
| 472 | if ((error = net_buf_siz(cep->swbufq)) > 0) {
|
---|
| 473 |
|
---|
| 474 | /*
|
---|
| 475 | * +-----------+--------+---------+---------+
|
---|
| 476 | * | Ehter HDR | IP HDR | TCP HDR | TCP SDU |
|
---|
| 477 | * +-----------+--------+---------+---------+
|
---|
| 478 | * 14 20 20 n
|
---|
| 479 | * <---------------- error --------------->
|
---|
| 480 | * ^
|
---|
| 481 | * net_buf 㧠4 ãªã¯ãããå¢çã«ã¢ã©ã¤ã³ããã¦ããã
|
---|
| 482 | *
|
---|
| 483 | * tcp_output 㨠ip_output ã§ããã§ãã¯ãµã ãè¨ç®ããã¨ãã
|
---|
| 484 | * n ã 4 ãªã¯ãããå¢çã«ãªãããã« SDU ã®å¾ãã« 0 ã
|
---|
| 485 | * ãããã£ã³ã°ããããã®åãèæ
|
---|
| 486 | ®ãã¦éä¿¡ã¦ã£ã³ããããã¡ã®
|
---|
| 487 | * 空ããµã¤ãºã 4 ãªã¯ãããå¢çã«èª¿æ´ããã
|
---|
| 488 | */
|
---|
| 489 | error = (uint_t)(((error - IF_IP_TCP_NET_HDR_SIZE(&cep->dstaddr.ipaddr)) >> 2 << 2) - cep->swbuf_count);
|
---|
| 490 |
|
---|
| 491 | /* éä¿¡ã¦ã¤ã³ããµã¤ãºã«ãããµã¤ãºã調æ´ããã*/
|
---|
| 492 | if (error > cep->snd_wnd)
|
---|
| 493 | error = cep->snd_wnd;
|
---|
| 494 | if (error > cep->snd_cwnd)
|
---|
| 495 | error = cep->snd_cwnd;
|
---|
| 496 |
|
---|
| 497 | /* ç¸æã®æ大åä¿¡ã»ã°ã¡ã³ããµã¤ãº (maxseg) ãè¶
|
---|
| 498 | ããªãããã«ããã*/
|
---|
| 499 | if (error > cep->maxseg)
|
---|
| 500 | error = cep->maxseg;
|
---|
| 501 |
|
---|
| 502 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºããã¼ã¿é·ãè¨å®ãããã®å¤ãè¿ãã*/
|
---|
| 503 | cep->get_buf_len = error;
|
---|
| 504 |
|
---|
| 505 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ã®å
|
---|
| 506 | é ãè¨å®ããã*/
|
---|
| 507 | *p_buf = cep->sbuf_wptr;
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | else { /* ãããã¯ã¼ã¯ãããã¡ãä¸æ£ */
|
---|
| 511 |
|
---|
| 512 | /* éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã*/
|
---|
| 513 | tcp_free_swbufq_cs(cep);
|
---|
| 514 | }
|
---|
| 515 |
|
---|
| 516 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
| 517 | syscall(sig_sem(cep->semid_lock));
|
---|
| 518 |
|
---|
| 519 | return error;
|
---|
| 520 | }
|
---|
| 521 |
|
---|
| 522 | /*
|
---|
| 523 | * tcp_send_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ãéä¿¡å¯è½ã«ããï¼å°ç¨ï¼ã
|
---|
| 524 | */
|
---|
| 525 |
|
---|
| 526 | void
|
---|
| 527 | tcp_send_swbuf_cs (T_TCP_CEP *cep, uint_t len)
|
---|
| 528 | {
|
---|
| 529 | /* é信端ç¹ãããã¯ããã*/
|
---|
| 530 | syscall(wai_sem(cep->semid_lock));
|
---|
| 531 |
|
---|
| 532 | cep->sbuf_wptr += len;
|
---|
| 533 | cep->swbuf_count += len;
|
---|
| 534 |
|
---|
| 535 | /* ãããã¯ã¼ã¯ãããã¡é·ã¨ IP ãã¼ã¿ã°ã©ã é·ãè¨å®ããã*/
|
---|
| 536 | cep->swbufq->len = (uint16_t)(cep->swbuf_count + IF_IP_TCP_NET_HDR_SIZE(&cep->dstaddr.ipaddr));
|
---|
| 537 | SET_IP_SDU_SIZE(cep->swbufq, len + TCP_HDR_SIZE);
|
---|
| 538 |
|
---|
| 539 | /* tcp_get_buf ã®å²å½ã¦é·ããªã»ããããã*/
|
---|
| 540 | cep->get_buf_len = 0;
|
---|
| 541 |
|
---|
| 542 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
| 543 | syscall(sig_sem(cep->semid_lock));
|
---|
| 544 |
|
---|
| 545 | /* ãã©ã°ããéä¿¡å¯è½ã«è¨å®ããå¼·å¶çã«éä¿¡ããã*/
|
---|
| 546 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_SEND_READY
|
---|
| 547 | | TCP_CEP_FLG_FORCE
|
---|
| 548 | | TCP_CEP_FLG_FORCE_CLEAR
|
---|
| 549 | | TCP_CEP_FLG_POST_OUTPUT;
|
---|
| 550 | }
|
---|
| 551 |
|
---|
| 552 | /*
|
---|
| 553 | * tcp_free_swbufq_cs -- éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®è§£æ¾ãæ示ããï¼å°ç¨ï¼ã
|
---|
| 554 | *
|
---|
| 555 | * 注æ:
|
---|
| 556 | * å¿
|
---|
| 557 | è¦ã§ããã°ããã®é¢æ°ãå¼ã³åºãåã«ãé信端ç¹ãããã¯ãã
|
---|
| 558 | * æ»ã£ãå¾ã解é¤ããå¿
|
---|
| 559 | è¦ãããã
|
---|
| 560 | */
|
---|
| 561 |
|
---|
| 562 | void
|
---|
| 563 | tcp_free_swbufq_cs (T_TCP_CEP *cep)
|
---|
| 564 | {
|
---|
| 565 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãå¾
|
---|
| 566 | ã¡ãåãæ¶ãã*/
|
---|
| 567 | cep->flags &= ~TCP_CEP_FLG_WBCS_NBUF_REQ;
|
---|
| 568 |
|
---|
| 569 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) != TCP_CEP_FLG_WBCS_FREE) {
|
---|
| 570 | /*
|
---|
| 571 | * éä¿¡ã¦ã£ã³ããããã¡ãåé¤ããããã«ããã©ã°ã ACK å®äºã«è¨å®ãã
|
---|
| 572 | * TCP åºåã¿ã¹ã¯ãèµ·åããã
|
---|
| 573 | */
|
---|
| 574 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_ACKED;
|
---|
| 575 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
| 576 | }
|
---|
| 577 | }
|
---|
| 578 |
|
---|
| 579 | /*
|
---|
| 580 | * tcp_alloc_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ç¨ã®ãããã¯ã¼ã¯ãããã¡ã®å²ãå½ã¦ãæ示ããï¼å°ç¨ï¼ã
|
---|
| 581 | */
|
---|
| 582 |
|
---|
| 583 | void
|
---|
| 584 | tcp_alloc_swbuf_cs (T_TCP_CEP *cep)
|
---|
| 585 | {
|
---|
| 586 | cep->flags |= TCP_CEP_FLG_WBCS_NBUF_REQ;
|
---|
| 587 |
|
---|
| 588 | /*
|
---|
| 589 | * éä¿¡ã¦ã£ã³ããããã¡ãæªä½¿ç¨ã®å ´åã®ã¿ã
|
---|
| 590 | * éä¿¡ã¦ã£ã³ããããã¡ç¨ã®ãããã¯ã¼ã¯ãããã¡ã®å²ãå½ã¦ãæ示ããã
|
---|
| 591 | */
|
---|
| 592 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_FREE)
|
---|
| 593 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
| 594 | }
|
---|
| 595 |
|
---|
| 596 | /*
|
---|
| 597 | * tcp_is_swbuf_full_cs -- éä¿¡ã¦ã£ã³ããããã¡ãæºæ¯ããã§ãã¯ããï¼å°ç¨ï¼ã
|
---|
| 598 | */
|
---|
| 599 |
|
---|
| 600 | bool_t
|
---|
| 601 | tcp_is_swbuf_full_cs (T_TCP_CEP *cep)
|
---|
| 602 | {
|
---|
| 603 | return (cep->flags & TCP_CEP_FLG_WBCS_MASK) != TCP_CEP_FLG_WBCS_NBUF_READY ||
|
---|
| 604 | cep->swbuf_count >= cep->swbufq->len - IF_IP_TCP_NET_HDR_SIZE(&cep->dstaddr.ipaddr);
|
---|
| 605 | }
|
---|
| 606 |
|
---|
| 607 | /*
|
---|
| 608 | * tcp_init_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ãåæåããï¼å°ç¨ï¼ã
|
---|
| 609 | *
|
---|
| 610 | * 注æ: tcp_get_segment ã§ãããã¯ã¼ã¯ãããã¡ãç²å¾ãã
|
---|
| 611 | * ç´å¾ã«å¼ã³åºããã¨ã
|
---|
| 612 | */
|
---|
| 613 |
|
---|
| 614 | void
|
---|
| 615 | tcp_init_swbuf (T_TCP_CEP *cep)
|
---|
| 616 | {
|
---|
| 617 | /* éä¿¡ã¦ã¤ã³ããããã¡ã®ä½¿ç¨ä¸ãµã¤ãºããªã»ããããã*/
|
---|
| 618 | cep->swbuf_count = 0;
|
---|
| 619 |
|
---|
| 620 | /* éä¿¡ã¦ã¤ã³ããããã¡ã®ã¢ãã¬ã¹ãè¨å®ããã*/
|
---|
| 621 | cep->sbuf_wptr = cep->sbuf_rptr = GET_TCP_SDU(cep->swbufq, IF_IP_TCP_NET_HDR_OFFSET(&cep->dstaddr.ipaddr));
|
---|
| 622 |
|
---|
| 623 | /* ãã©ã°ãããããã¯ã¼ã¯ãããã¡å²å½ã¦æ¸ã¿ã«è¨å®ããã*/
|
---|
| 624 | cep->flags = (cep->flags & ~(TCP_CEP_FLG_WBCS_NBUF_REQ | TCP_CEP_FLG_WBCS_MASK))
|
---|
| 625 | | TCP_CEP_FLG_WBCS_NBUF_READY;
|
---|
| 626 | }
|
---|
| 627 |
|
---|
| 628 | /*
|
---|
| 629 | * tcp_push_res_nbuf -- ãããã¯ã¼ã¯ãããã¡ãäºç´ããï¼å°ç¨ï¼ã
|
---|
| 630 | */
|
---|
| 631 |
|
---|
| 632 | T_NET_BUF *
|
---|
| 633 | tcp_push_res_nbuf (T_NET_BUF *nbuf)
|
---|
| 634 | {
|
---|
| 635 | static int_t last_ix = 0;
|
---|
| 636 |
|
---|
| 637 | T_TCP_CEP *cep;
|
---|
| 638 | int_t ix, sel_ix;
|
---|
| 639 |
|
---|
| 640 | if (++ last_ix == tmax_tcp_cepid)
|
---|
| 641 | last_ix = 0;
|
---|
| 642 | sel_ix = ix = last_ix;
|
---|
| 643 | do {
|
---|
| 644 | cep = &tcp_cep[ix];
|
---|
| 645 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_NBUF_PEND) {
|
---|
| 646 |
|
---|
| 647 | /* ãããã¯ã¼ã¯ãããã¡ãäºç´ããã*/
|
---|
| 648 | cep->swbufq = nbuf;
|
---|
| 649 | nbuf = NULL;
|
---|
| 650 |
|
---|
| 651 | /* ãã©ã°ãäºç´ã«è¨å®ããã*/
|
---|
| 652 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_NBUF_RSVD;
|
---|
| 653 | sel_ix = ix;
|
---|
| 654 | break;
|
---|
| 655 | }
|
---|
| 656 | if (++ ix == tmax_tcp_cepid)
|
---|
| 657 | ix = 0;
|
---|
| 658 | } while (ix != last_ix);
|
---|
| 659 |
|
---|
| 660 | last_ix = sel_ix;
|
---|
| 661 |
|
---|
| 662 | return nbuf;
|
---|
| 663 | }
|
---|
| 664 |
|
---|
| 665 | /*
|
---|
| 666 | * tcp_pull_res_nbuf -- äºç´ãã¦ãããããã¯ã¼ã¯ãããã¡è¿ãï¼å°ç¨ï¼ã
|
---|
| 667 | */
|
---|
| 668 |
|
---|
| 669 | T_NET_BUF *
|
---|
| 670 | tcp_pull_res_nbuf (ATR nbatr)
|
---|
| 671 | {
|
---|
| 672 | T_NET_BUF *nbuf;
|
---|
| 673 | T_TCP_CEP *cep;
|
---|
| 674 |
|
---|
| 675 | cep = GET_TCP_CEP(nbatr & NBA_ID_MASK);
|
---|
| 676 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_NBUF_RSVD) {
|
---|
| 677 |
|
---|
| 678 | /* äºç´ãã¦ãããããã¯ã¼ã¯ãããã¡ãè¿ãã*/
|
---|
| 679 | nbuf = cep->swbufq;
|
---|
| 680 | cep->swbufq = NULL;
|
---|
| 681 |
|
---|
| 682 | /* TCP åºåã¿ã¹ã¯ãèµ·åããã*/
|
---|
| 683 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
| 684 | }
|
---|
| 685 | else
|
---|
| 686 | nbuf = NULL;
|
---|
| 687 |
|
---|
| 688 | return nbuf;
|
---|
| 689 | }
|
---|
| 690 |
|
---|
| 691 | #endif /* of #ifdef TCP_CFG_SWBUF_CSAVE */
|
---|
| 692 |
|
---|
| 693 | #ifdef TCP_CFG_RWBUF_CSAVE
|
---|
| 694 |
|
---|
| 695 | #ifdef TCP_CFG_RWBUF_CSAVE_ONLY
|
---|
| 696 |
|
---|
| 697 | #else /* of #ifdef TCP_CFG_RWBUF_CSAVE_ONLY */
|
---|
| 698 |
|
---|
| 699 | /*
|
---|
| 700 | * TCP é信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãæå¹ãªå ´å
|
---|
| 701 | * ãã ããé信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ï¼cep->rbufï¼ã®å¤ã«ããã
|
---|
| 702 | * TCP é信端ç¹æ¯ã«åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ã使ç¨ãããã
|
---|
| 703 | * 使ç¨ããªãããåãæ¿ããã
|
---|
| 704 | */
|
---|
| 705 |
|
---|
| 706 | /*
|
---|
| 707 | * tcp_drop_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®æåã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 708 | */
|
---|
| 709 |
|
---|
| 710 | void
|
---|
| 711 | tcp_drop_rwbuf (T_TCP_CEP *cep, uint_t len)
|
---|
| 712 | {
|
---|
| 713 | if (IS_PTR_DEFINED(cep->rbuf))
|
---|
| 714 | tcp_drop_rwbuf_ncs(cep, len);
|
---|
| 715 | else
|
---|
| 716 | tcp_drop_rwbuf_cs(cep, len);
|
---|
| 717 | }
|
---|
| 718 |
|
---|
| 719 | /*
|
---|
| 720 | * tcp_read_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããåèªã¿åºãã
|
---|
| 721 | */
|
---|
| 722 |
|
---|
| 723 | uint_t
|
---|
| 724 | tcp_read_rwbuf (T_TCP_CEP *cep, void *data, uint_t len)
|
---|
| 725 | {
|
---|
| 726 | if (IS_PTR_DEFINED(cep->rbuf))
|
---|
| 727 | return tcp_read_rwbuf_ncs(cep, data, len);
|
---|
| 728 | else
|
---|
| 729 | return tcp_read_rwbuf_cs(cep, data, len);
|
---|
| 730 | }
|
---|
| 731 |
|
---|
| 732 | /*
|
---|
| 733 | * tcp_get_rwbuf_addr -- åä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããã
|
---|
| 734 | */
|
---|
| 735 |
|
---|
| 736 | uint_t
|
---|
| 737 | tcp_get_rwbuf_addr (T_TCP_CEP *cep, void **p_buf)
|
---|
| 738 | {
|
---|
| 739 | if (IS_PTR_DEFINED(cep->rbuf))
|
---|
| 740 | return tcp_get_rwbuf_addr_ncs(cep, p_buf);
|
---|
| 741 | else
|
---|
| 742 | return tcp_get_rwbuf_addr_cs(cep, p_buf);
|
---|
| 743 | }
|
---|
| 744 |
|
---|
| 745 | /*
|
---|
| 746 | * tcp_free_rwbufq -- åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã解æ¾ããã
|
---|
| 747 | */
|
---|
| 748 |
|
---|
| 749 | void
|
---|
| 750 | tcp_free_rwbufq (T_TCP_CEP *cep)
|
---|
| 751 | {
|
---|
| 752 | if (!IS_PTR_DEFINED(cep->rbuf))
|
---|
| 753 | tcp_free_rwbufq_cs(cep);
|
---|
| 754 | }
|
---|
| 755 |
|
---|
| 756 | /*
|
---|
| 757 | * tcp_write_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãã
|
---|
| 758 | */
|
---|
| 759 |
|
---|
| 760 | void
|
---|
| 761 | tcp_write_rwbuf (T_TCP_CEP *cep, T_NET_BUF *input, uint_t thoff)
|
---|
| 762 | {
|
---|
| 763 | if (IS_PTR_DEFINED(cep->rbuf))
|
---|
| 764 | tcp_write_rwbuf_ncs(cep, input, thoff);
|
---|
| 765 | else
|
---|
| 766 | tcp_write_rwbuf_cs(cep, input, thoff);
|
---|
| 767 | }
|
---|
| 768 |
|
---|
| 769 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE_ONLY */
|
---|
| 770 |
|
---|
| 771 | /*
|
---|
| 772 | * TCP é信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãæå¹
|
---|
| 773 | */
|
---|
| 774 |
|
---|
| 775 | /*
|
---|
| 776 | * tcp_drop_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®æåã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 777 | */
|
---|
| 778 |
|
---|
| 779 | void
|
---|
| 780 | tcp_drop_rwbuf_cs (T_TCP_CEP *cep, uint_t len)
|
---|
| 781 | {
|
---|
| 782 | T_TCP_Q_HDR *qhdr;
|
---|
| 783 |
|
---|
| 784 | if (cep->rwbufq != NULL) {
|
---|
| 785 |
|
---|
| 786 | qhdr = GET_TCP_Q_HDR(cep->rwbufq, GET_IP_TCP_Q_HDR_OFFSET(cep->rwbufq));
|
---|
| 787 | cep->rwbuf_count -= len;
|
---|
| 788 |
|
---|
| 789 | /* ãããã¯ã¼ã¯ãããã¡ã«ãã¼ã¿ãç¡ããªã£ãã解æ¾ããã*/
|
---|
| 790 | if (len == qhdr->slen) {
|
---|
| 791 | T_NET_BUF *next;
|
---|
| 792 |
|
---|
| 793 | #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES
|
---|
| 794 |
|
---|
| 795 | cep->rwbufq_entries --;
|
---|
| 796 |
|
---|
| 797 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES */
|
---|
| 798 |
|
---|
| 799 | next = qhdr->next;
|
---|
| 800 | syscall(rel_net_buf(cep->rwbufq));
|
---|
| 801 | cep->rwbufq = next;
|
---|
| 802 | }
|
---|
| 803 | else {
|
---|
| 804 | qhdr->slen -= len;
|
---|
| 805 | qhdr->soff += len;
|
---|
| 806 | }
|
---|
| 807 | }
|
---|
| 808 | }
|
---|
| 809 |
|
---|
| 810 | /*
|
---|
| 811 | * tcp_read_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããåèªã¿åºãã
|
---|
| 812 | */
|
---|
| 813 |
|
---|
| 814 | uint_t
|
---|
| 815 | tcp_read_rwbuf_cs (T_TCP_CEP *cep, void *data, uint_t len)
|
---|
| 816 | {
|
---|
| 817 | T_TCP_Q_HDR *qhdr;
|
---|
| 818 | uint_t blen, rlen = 0;
|
---|
| 819 | uint8_t *buf = (uint8_t*)data;
|
---|
| 820 |
|
---|
| 821 | /* é信端ç¹ãããã¯ããã*/
|
---|
| 822 | syscall(wai_sem(cep->semid_lock));
|
---|
| 823 |
|
---|
| 824 | /*
|
---|
| 825 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã«ãããã¯ã¼ã¯ãããã¡ãç¡ããªãã
|
---|
| 826 | * len ã 0 ã«ãªãã¾ã§ç¶ããã
|
---|
| 827 | */
|
---|
| 828 | while (cep->rwbufq != NULL && len > 0) {
|
---|
| 829 | qhdr = GET_TCP_Q_HDR(cep->rwbufq, GET_IP_TCP_Q_HDR_OFFSET(cep->rwbufq));
|
---|
| 830 |
|
---|
| 831 | /*
|
---|
| 832 | * len ã¨åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®å
|
---|
| 833 | é ãããã¯ã¼ã¯ãããã¡ã®
|
---|
| 834 | * ãã¼ã¿æ°ã®å°ããæ¹ã移ããã¼ã¿æ°ã«ããã
|
---|
| 835 | */
|
---|
| 836 | if (len > qhdr->slen)
|
---|
| 837 | blen = qhdr->slen;
|
---|
| 838 | else
|
---|
| 839 | blen = len;
|
---|
| 840 |
|
---|
| 841 | memcpy(buf,
|
---|
| 842 | GET_TCP_SDU(cep->rwbufq, GET_IP_TCP_Q_HDR_OFFSET(cep->rwbufq)) + qhdr->soff,
|
---|
| 843 | (size_t)blen);
|
---|
| 844 |
|
---|
| 845 | /*
|
---|
| 846 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã«
|
---|
| 847 | * ãã¼ã¿ãç¡ããªã£ãã解æ¾ããã
|
---|
| 848 | */
|
---|
| 849 | tcp_drop_rwbuf_cs(cep, blen);
|
---|
| 850 |
|
---|
| 851 | buf += blen;
|
---|
| 852 | rlen += blen;
|
---|
| 853 | len -= blen;
|
---|
| 854 | }
|
---|
| 855 |
|
---|
| 856 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
| 857 | syscall(sig_sem(cep->semid_lock));
|
---|
| 858 |
|
---|
| 859 | return rlen;
|
---|
| 860 | }
|
---|
| 861 |
|
---|
| 862 | /*
|
---|
| 863 | * tcp_get_rwbuf_addr -- åä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããã
|
---|
| 864 | */
|
---|
| 865 |
|
---|
| 866 | uint_t
|
---|
| 867 | tcp_get_rwbuf_addr_cs (T_TCP_CEP *cep, void **p_buf)
|
---|
| 868 | {
|
---|
| 869 | T_TCP_Q_HDR *qhdr;
|
---|
| 870 | uint_t len;
|
---|
| 871 |
|
---|
| 872 | /* é信端ç¹ãããã¯ããã*/
|
---|
| 873 | syscall(wai_sem(cep->semid_lock));
|
---|
| 874 |
|
---|
| 875 | if (cep->rwbufq == NULL) {
|
---|
| 876 |
|
---|
| 877 | /* åä¿¡ã¦ã£ã³ããããã¡ãå
|
---|
| 878 | ¨ã¦éæ¾ããã¦ããã¨ãã*/
|
---|
| 879 | *p_buf = NULL;
|
---|
| 880 | len = 0;
|
---|
| 881 | }
|
---|
| 882 | else {
|
---|
| 883 |
|
---|
| 884 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ã®ã¢ãã¬ã¹ã®å
|
---|
| 885 | é ãè¨å®ããã*/
|
---|
| 886 | qhdr = GET_TCP_Q_HDR(cep->rwbufq, GET_IP_TCP_Q_HDR_OFFSET(cep->rwbufq));
|
---|
| 887 | *p_buf = GET_TCP_SDU(cep->rwbufq, GET_IP_TCP_Q_HDR_OFFSET(cep->rwbufq)) + qhdr->soff;
|
---|
| 888 |
|
---|
| 889 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿é·ãè¨ç®ããã*/
|
---|
| 890 | len = qhdr->slen;
|
---|
| 891 | }
|
---|
| 892 |
|
---|
| 893 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
| 894 | syscall(sig_sem(cep->semid_lock));
|
---|
| 895 |
|
---|
| 896 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿é·ãè¨å®ãããã®å¤ãè¿ãã*/
|
---|
| 897 | cep->rcv_buf_len = len;
|
---|
| 898 | return len;
|
---|
| 899 | }
|
---|
| 900 |
|
---|
| 901 | /*
|
---|
| 902 | * tcp_free_rwbufq -- åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã解æ¾ããã
|
---|
| 903 | *
|
---|
| 904 | * 注æ:
|
---|
| 905 | * å¿
|
---|
| 906 | è¦ã§ããã°ããã®é¢æ°ãå¼ã³åºãåã«ãé信端ç¹ãããã¯ãã
|
---|
| 907 | * æ»ã£ãå¾ã解é¤ããå¿
|
---|
| 908 | è¦ãããã
|
---|
| 909 | */
|
---|
| 910 |
|
---|
| 911 | void
|
---|
| 912 | tcp_free_rwbufq_cs (T_TCP_CEP *cep)
|
---|
| 913 | {
|
---|
| 914 | T_NET_BUF *next;
|
---|
| 915 |
|
---|
| 916 | if (cep->rwbuf_count == 0 && cep->reassq == NULL) {
|
---|
| 917 | while (cep->rwbufq != NULL) {
|
---|
| 918 | next = GET_TCP_Q_HDR(cep->rwbufq, GET_IP_TCP_Q_HDR_OFFSET(cep->rwbufq))->next;
|
---|
| 919 |
|
---|
| 920 | #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES
|
---|
| 921 |
|
---|
| 922 | cep->rwbufq_entries --;
|
---|
| 923 |
|
---|
| 924 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES */
|
---|
| 925 |
|
---|
| 926 | syscall(rel_net_buf(cep->rwbufq));
|
---|
| 927 | cep->rwbufq = next;
|
---|
| 928 | }
|
---|
| 929 |
|
---|
| 930 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ä½¿ç¨ä¸ãµã¤ãºããªã»ããããã*/
|
---|
| 931 | cep->rwbuf_count = 0;
|
---|
| 932 | }
|
---|
| 933 | }
|
---|
| 934 |
|
---|
| 935 | /*
|
---|
| 936 | * tcp_write_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãã
|
---|
| 937 | *
|
---|
| 938 | * 注æ:
|
---|
| 939 | * å
|
---|
| 940 | ¥å input ã¯ãT_TCP_Q_HDR ã«ãããªã³ã¯ããã
|
---|
| 941 | * 並ã¹æ¿ããçµäºãã¦ããªããã°ãªããªããã¾ãã
|
---|
| 942 | * 追å ãããã¼ã¿ã¯ãåä¿¡ã¦ã£ã³ããããã¡ã«åã¾ããã¨ã
|
---|
| 943 | */
|
---|
| 944 |
|
---|
| 945 | void
|
---|
| 946 | tcp_write_rwbuf_cs (T_TCP_CEP *cep, T_NET_BUF *input, uint_t thoff)
|
---|
| 947 | {
|
---|
| 948 | T_TCP_Q_HDR *qhdr;
|
---|
| 949 | T_NET_BUF **nextp;
|
---|
| 950 | uint_t inlen, last;
|
---|
| 951 |
|
---|
| 952 | /* é信端ç¹ãããã¯ããã*/
|
---|
| 953 | syscall(wai_sem(cep->semid_lock));
|
---|
| 954 |
|
---|
| 955 | qhdr = (T_TCP_Q_HDR*)GET_TCP_HDR(input, thoff);
|
---|
| 956 |
|
---|
| 957 | inlen = qhdr->slen;
|
---|
| 958 |
|
---|
| 959 | #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES
|
---|
| 960 |
|
---|
| 961 | if (cep->rwbufq_entries >= TCP_CFG_RWBUF_CSAVE_MAX_QUEUES &&
|
---|
| 962 | inlen > 0 && (qhdr->flags & TCP_FLG_FIN) == 0) {
|
---|
| 963 |
|
---|
| 964 | /*
|
---|
| 965 | * TCP é信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ã®ã
|
---|
| 966 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®æ大ã¨ã³ããªæ°ãè¶
|
---|
| 967 | ããã¨ãã¯ã
|
---|
| 968 | * åä¿¡ããã»ã°ã¡ã³ããç ´æ£ããã
|
---|
| 969 | * ãã ããSDU é·ã 0 ã®ã»ã°ã¡ã³ã㨠FIN ã»ã°ã¡ã³ãã¯ç ´æ£ããªãã
|
---|
| 970 | * ãªããæ£å¸¸ã«åä¿¡ããã»ã°ã¡ã³ããç ´æ£ãããããåéåæ°ãå¢å ããã
|
---|
| 971 | */
|
---|
| 972 | syscall(rel_net_buf(input));
|
---|
| 973 |
|
---|
| 974 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
| 975 | syscall(sig_sem(cep->semid_lock));
|
---|
| 976 | return;
|
---|
| 977 | }
|
---|
| 978 |
|
---|
| 979 | cep->rwbufq_entries ++;
|
---|
| 980 |
|
---|
| 981 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES */
|
---|
| 982 |
|
---|
| 983 | qhdr = (T_TCP_Q_HDR*)GET_TCP_HDR(input, thoff);
|
---|
| 984 |
|
---|
| 985 | /* åä¿¡æ¸ã¿ã·ã¼ã±ã³ã¹çªå·ãæ´æ°ããã*/
|
---|
| 986 | cep->rcv_nxt += inlen;
|
---|
| 987 |
|
---|
| 988 | /* ç·æ¥ãã¼ã¿ã® SDU è£æ£ãè¡ãã*/
|
---|
| 989 | if (qhdr->urp > 0 && inlen > 0) {
|
---|
| 990 | inlen -= qhdr->urp;
|
---|
| 991 | qhdr->slen -= qhdr->urp;
|
---|
| 992 | qhdr->urp = 0;
|
---|
| 993 | }
|
---|
| 994 |
|
---|
| 995 | last = cep->rwbuf_count;
|
---|
| 996 |
|
---|
| 997 | /* ãããã¯ã¼ã¯ãããã¡ãåä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®æå¾ã«é£çµããã*/
|
---|
| 998 | qhdr->next = NULL;
|
---|
| 999 | nextp = &cep->rwbufq;
|
---|
| 1000 | while (*nextp)
|
---|
| 1001 | nextp = &GET_TCP_Q_HDR(*nextp, GET_IP_TCP_Q_HDR_OFFSET(*nextp))->next;
|
---|
| 1002 | *nextp = input;
|
---|
| 1003 |
|
---|
| 1004 | /*
|
---|
| 1005 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
| 1006 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
| 1007 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
| 1008 | */
|
---|
| 1009 | if (inlen > 0) {
|
---|
| 1010 | cep->rwbuf_count += inlen;
|
---|
| 1011 | NET_COUNT_TCP(net_count_tcp[NC_TCP_RECV_DATA_SEGS], 1);
|
---|
| 1012 | NET_COUNT_TCP(net_count_tcp[NC_TCP_RECV_DATA_OCTETS], inlen);
|
---|
| 1013 | }
|
---|
| 1014 |
|
---|
| 1015 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
| 1016 | syscall(sig_sem(cep->semid_lock));
|
---|
| 1017 |
|
---|
| 1018 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
| 1019 |
|
---|
| 1020 | if (cep->rcv_nblk_tfn == TFN_TCP_RCV_BUF) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
| 1021 |
|
---|
| 1022 | int_t len;
|
---|
| 1023 |
|
---|
| 1024 | qhdr = GET_TCP_Q_HDR(cep->rwbufq, GET_IP_TCP_Q_HDR_OFFSET(cep->rwbufq));
|
---|
| 1025 | len = qhdr->slen;
|
---|
| 1026 |
|
---|
| 1027 | /*
|
---|
| 1028 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
| 1029 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
| 1030 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
| 1031 | */
|
---|
| 1032 | if (len > 0 || inlen == 0) {
|
---|
| 1033 |
|
---|
| 1034 | /* tcp_rcv_buf ã®å²å½ã¦é·ãè¨å®ããã*/
|
---|
| 1035 | cep->rcv_buf_len = len;
|
---|
| 1036 |
|
---|
| 1037 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ã¢ãã¬ã¹ãè¿ãã*/
|
---|
| 1038 | *cep->rcv_p_buf = GET_TCP_SDU(cep->rwbufq,
|
---|
| 1039 | GET_IP_TCP_Q_HDR_OFFSET(cep->rwbufq)) + qhdr->soff;
|
---|
| 1040 |
|
---|
| 1041 | if (IS_PTR_DEFINED(cep->callback))
|
---|
| 1042 |
|
---|
| 1043 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
| 1044 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)len);
|
---|
| 1045 | #else
|
---|
| 1046 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
| 1047 | #endif
|
---|
| 1048 | else
|
---|
| 1049 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
|
---|
| 1050 |
|
---|
| 1051 | if (len == 0) {
|
---|
| 1052 |
|
---|
| 1053 | /*
|
---|
| 1054 | * é信端ç¹ãããã¯ãã¦ã
|
---|
| 1055 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 1056 | */
|
---|
| 1057 | syscall(wai_sem(cep->semid_lock));
|
---|
| 1058 | tcp_free_rwbufq_cs(cep);
|
---|
| 1059 | syscall(sig_sem(cep->semid_lock));
|
---|
| 1060 | }
|
---|
| 1061 | }
|
---|
| 1062 |
|
---|
| 1063 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
| 1064 | cep->rcv_tskid = TA_NULL;
|
---|
| 1065 | cep->rcv_tfn = cep->rcv_nblk_tfn = TFN_TCP_UNDEF;
|
---|
| 1066 | }
|
---|
| 1067 |
|
---|
| 1068 | else if (cep->rcv_nblk_tfn == TFN_TCP_RCV_DAT) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
| 1069 | int_t len;
|
---|
| 1070 |
|
---|
| 1071 | /* åä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãåãåºãã*/
|
---|
| 1072 | if ((len = tcp_read_rwbuf_cs(cep, cep->rcv_data, (uint_t)cep->rcv_len)) > 0) {
|
---|
| 1073 | /* ç¸æã«ã¦ã£ã³ãã¦ãµã¤ãºãå¤ãã£ããã¨ãç¥ãããããåºåããã¹ãããã*/
|
---|
| 1074 | cep->flags |= TCP_CEP_FLG_POST_OUTPUT;
|
---|
| 1075 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
| 1076 | }
|
---|
| 1077 |
|
---|
| 1078 | /*
|
---|
| 1079 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
| 1080 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
| 1081 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
| 1082 | */
|
---|
| 1083 | if (len > 0 || inlen == 0) {
|
---|
| 1084 |
|
---|
| 1085 | if (IS_PTR_DEFINED(cep->callback))
|
---|
| 1086 |
|
---|
| 1087 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
| 1088 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)len);
|
---|
| 1089 | #else
|
---|
| 1090 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
| 1091 | #endif
|
---|
| 1092 | else
|
---|
| 1093 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
|
---|
| 1094 | }
|
---|
| 1095 |
|
---|
| 1096 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
| 1097 | cep->rcv_tskid = TA_NULL;
|
---|
| 1098 | cep->rcv_tfn = cep->rcv_nblk_tfn = TFN_TCP_UNDEF;
|
---|
| 1099 | }
|
---|
| 1100 | else {
|
---|
| 1101 |
|
---|
| 1102 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
| 1103 |
|
---|
| 1104 | if (inlen == 0 && cep->rwbuf_count == 0) {
|
---|
| 1105 | /*
|
---|
| 1106 | * åä¿¡ã¦ã£ã³ããããã¡å
|
---|
| 1107 | ã®ãã¼ã¿æ°ã 0 ã§ã
|
---|
| 1108 | * ç¸æãã FIN ãã©ã°ãä»ããã»ã°ã¡ã³ããåä¿¡ããã¨ãã¯ã
|
---|
| 1109 | * é信端ç¹ãããã¯ãã¦ã
|
---|
| 1110 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
| 1111 | */
|
---|
| 1112 | syscall(wai_sem(cep->semid_lock));
|
---|
| 1113 | tcp_free_rwbufq_cs(cep);
|
---|
| 1114 | syscall(sig_sem(cep->semid_lock));
|
---|
| 1115 | }
|
---|
| 1116 |
|
---|
| 1117 | /*
|
---|
| 1118 | * åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãå
|
---|
| 1119 | ¥ããã inlen == 0 ã®æãå
|
---|
| 1120 | ¥åã¿ã¹ã¯ãèµ·åºããã
|
---|
| 1121 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
| 1122 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
| 1123 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
| 1124 | */
|
---|
| 1125 | if ((last == 0 && cep->rwbuf_count > 0) || inlen == 0) {
|
---|
| 1126 | syscall(set_flg(cep->rcv_flgid, TCP_CEP_EVT_RWBUF_READY));
|
---|
| 1127 | }
|
---|
| 1128 |
|
---|
| 1129 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
| 1130 |
|
---|
| 1131 | }
|
---|
| 1132 |
|
---|
| 1133 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
| 1134 |
|
---|
| 1135 | }
|
---|
| 1136 |
|
---|
| 1137 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE */
|
---|
| 1138 |
|
---|
| 1139 | #endif /* of #ifdef SUPPORT_TCP */
|
---|