1 | /*
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2 | * TINET (TCP/IP Protocol Stack)
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3 | *
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4 | * Copyright (C) 2001-2009 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 270 2017-02-09 04:03:47Z 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/ppp_ipcp.h>
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110 | #include <net/net.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 <netinet6/in6.h>
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118 | #include <netinet6/in6_var.h>
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119 | #include <netinet/in_var.h>
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120 | #include <netinet/ip.h>
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121 | #include <netinet/ip_var.h>
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122 | #include <netinet/ip6.h>
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123 | #include <netinet6/ip6_var.h>
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124 | #include <netinet6/nd6.h>
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125 | #include <netinet/tcp.h>
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126 | #include <netinet/tcp_timer.h>
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127 | #include <netinet/tcp_var.h>
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128 | #include <netinet/tcp_fsm.h>
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129 | #include <netinet/tcp_seq.h>
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130 | #include <netinet/in_itron.h>
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131 |
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132 | #ifdef SUPPORT_TCP
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133 |
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134 | #ifdef TCP_CFG_SWBUF_CSAVE
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135 |
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136 | #ifndef TCP_CFG_SWBUF_CSAVE_ONLY
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137 |
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138 | /*
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139 | * TCP é信端ç¹ã®éä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãæå¹ãªå ´å
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140 | * ãã ããé信端ç¹ã®éä¿¡ã¦ã£ã³ããããã¡ï¼cep->sbufï¼ã®å¤ã«ããã
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141 | * TCP é信端ç¹æ¯ã«éä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ã使ç¨ãããã
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142 | * 使ç¨ããªãããåãæ¿ããã
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143 | */
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144 |
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145 | /*
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146 | * tcp_drop_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããï¼é¸æï¼ã
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147 | */
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148 |
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149 | void
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150 | tcp_drop_swbuf (T_TCP_CEP *cep, uint_t len)
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151 | {
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152 | if (IS_PTR_DEFINED(cep->sbuf))
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153 | tcp_drop_swbuf_ncs(cep, len);
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154 | else
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155 | tcp_drop_swbuf_cs(cep, len);
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156 | }
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157 |
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158 | /*
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159 | * tcp_write_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãï¼é¸æï¼ã
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160 | */
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161 |
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162 | ER_UINT
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163 | tcp_write_swbuf (T_TCP_CEP *cep, void *data, uint_t len)
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164 | {
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165 | if (IS_PTR_DEFINED(cep->sbuf))
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166 | return tcp_write_swbuf_ncs(cep, data, len);
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167 | else
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168 | return tcp_write_swbuf_cs(cep, data, len);
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169 | }
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170 |
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171 | /*
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172 | * tcp_read_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãèªã¿åºãï¼é¸æï¼ã
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173 | */
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174 |
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175 | void
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176 | tcp_read_swbuf (T_TCP_CEP *cep, T_NET_BUF *output, uint_t len, uint_t doff)
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177 | {
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178 | if (IS_PTR_DEFINED(cep->sbuf))
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179 | tcp_read_swbuf_ncs(cep, output, len, doff);
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180 | }
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181 |
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182 | /*
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183 | * tcp_wait_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã¨ç¸æã®åä¿¡ã¦ã£ã³ããéãã®ãå¾
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184 | ã¤ï¼é¸æï¼ã
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185 | */
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186 |
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187 | ER
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188 | tcp_wait_swbuf (T_TCP_CEP *cep, TMO tmout)
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189 | {
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190 | if (IS_PTR_DEFINED(cep->sbuf))
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191 | return tcp_wait_swbuf_ncs(cep, tmout);
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192 | else
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193 | return tcp_wait_swbuf_cs(cep, tmout);
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194 | }
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195 |
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196 | /*
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197 | * tcp_get_swbuf_addr -- éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããï¼é¸æï¼ã
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198 | */
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199 |
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200 | ER_UINT
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201 | tcp_get_swbuf_addr (T_TCP_CEP *cep, void **p_buf)
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202 | {
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203 | if (IS_PTR_DEFINED(cep->sbuf))
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204 | return tcp_get_swbuf_addr_ncs(cep, p_buf);
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205 | else
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206 | return tcp_get_swbuf_addr_cs(cep, p_buf);
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207 | }
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208 |
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209 | /*
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210 | * tcp_send_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ãéä¿¡å¯è½ã«ããï¼é¸æï¼ã
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211 | */
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212 |
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213 | void
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214 | tcp_send_swbuf (T_TCP_CEP *cep, uint_t len)
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215 | {
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216 | if (IS_PTR_DEFINED(cep->sbuf))
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217 | tcp_send_swbuf_ncs(cep, len);
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218 | else
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219 | tcp_send_swbuf_cs(cep, len);
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220 | }
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221 |
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222 | /*
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223 | * tcp_free_swbufq -- éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®è§£æ¾ãæ示ããï¼é¸æï¼ã
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224 | */
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225 |
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226 | void
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227 | tcp_free_swbufq (T_TCP_CEP *cep)
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228 | {
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229 | if (!IS_PTR_DEFINED(cep->sbuf))
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230 | tcp_free_swbufq_cs(cep);
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231 | }
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232 |
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233 | /*
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234 | * tcp_alloc_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ç¨ã®ãããã¯ã¼ã¯ãããã¡ã®å²ãå½ã¦ãæ示ããï¼é¸æï¼ã
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235 | */
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236 |
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237 | void
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238 | tcp_alloc_swbuf (T_TCP_CEP *cep)
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239 | {
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240 | if (!IS_PTR_DEFINED(cep->sbuf))
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241 | tcp_alloc_swbuf_cs(cep);
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242 | }
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243 |
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244 | /*
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245 | * tcp_is_swbuf_full -- éä¿¡ã¦ã£ã³ããããã¡ãæºæ¯ããã§ãã¯ããï¼é¸æï¼ã
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246 | */
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247 |
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248 | bool_t
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249 | tcp_is_swbuf_full (T_TCP_CEP *cep)
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250 | {
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251 | if (IS_PTR_DEFINED(cep->sbuf))
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252 | return tcp_is_swbuf_full_ncs(cep);
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253 | else
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254 | return tcp_is_swbuf_full_cs(cep);
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255 | }
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256 |
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257 | #endif /* of #ifndef TCP_CFG_SWBUF_CSAVE_ONLY */
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258 |
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259 | /*
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260 | * tcp_drop_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããï¼å°ç¨ï¼ã
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261 | */
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262 |
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263 | void
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264 | tcp_drop_swbuf_cs (T_TCP_CEP *cep, uint_t len)
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265 | {
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266 |
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267 | /*éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããã*/
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268 | cep->swbuf_count -= (uint16_t)len;
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269 |
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270 | /* éä¿¡æ¸ã¿ã§ãACKå¾
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271 | ã¡ã®æã¯ãACKå®äºã«å¤æ´ããã*/
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272 | if (len > 0 && (cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_SENT) {
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273 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_ACKED;
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274 | sig_sem(SEM_TCP_POST_OUTPUT);
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275 | }
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276 | }
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277 |
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278 | /*
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279 | * tcp_write_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãï¼å°ç¨ï¼ã
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280 | */
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281 |
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282 | ER_UINT
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283 | tcp_write_swbuf_cs (T_TCP_CEP *cep, void *data, uint_t len)
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284 | {
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285 | ER_UINT error;
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286 |
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287 | /* é信端ç¹ãããã¯ããã*/
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288 | syscall(wai_sem(cep->semid_lock));
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289 |
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290 | if ((error = net_buf_siz(cep->swbufq)) > 0 && error >= IF_IP_TCP_HDR_SIZE) {
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291 |
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292 |
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293 | /*
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294 | * +-----------+--------+---------+---------+
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295 | * | Ehter HDR | IP HDR | TCP HDR | TCP SDU |
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296 | * +-----------+--------+---------+---------+
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297 | * 14 20 20 n
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298 | * <---------------- error --------------->
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299 | * ^
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300 | * net_buf 㧠4 ãªã¯ãããå¢çã«ã¢ã©ã¤ã³ããã¦ããã
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301 | *
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302 | * tcp_output 㨠ip_output ã§ããã§ãã¯ãµã ãè¨ç®ããã¨ãã
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303 | * n ã 4 ãªã¯ãããå¢çã«ãªãããã« SDU ã®å¾ãã« 0 ã
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304 | * ãããã£ã³ã°ããããã®åãèæ
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305 | ®ãã¦éä¿¡ã¦ã£ã³ããããã¡ã®
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306 | * 空ããµã¤ãºã 4 ãªã¯ãããå¢çã«èª¿æ´ããã
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307 | */
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308 | error = (uint_t)(((error - IF_IP_TCP_HDR_SIZE) >> 2 << 2) + IF_IP_TCP_HDR_SIZE);
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309 |
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310 | if (len > cep->sbufsz - cep->swbuf_count)
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311 | len = (uint_t)(cep->sbufsz - cep->swbuf_count);
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312 | if (len > (error - IF_IP_TCP_HDR_SIZE))
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313 | len = (uint_t)(error - IF_IP_TCP_HDR_SIZE);
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314 |
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315 | /* éä¿¡ã¦ã¤ã³ããµã¤ãºã«ãããµã¤ãºã調æ´ããã*/
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316 | if (len > cep->snd_wnd)
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317 | len = cep->snd_wnd;
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318 | if (len > cep->snd_cwnd)
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319 | len = cep->snd_cwnd;
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320 |
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321 | /* ç¸æã®æ大åä¿¡ã»ã°ã¡ã³ããµã¤ãº (maxseg) ãè¶
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322 | ããªãããã«ããã*/
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323 | if (len > cep->maxseg)
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324 | len = cep->maxseg;
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325 |
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326 | /* ãã¼ã¿ã移ãã*/
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327 | memcpy(cep->sbuf_wptr, (void*)((uint8_t*)data), (size_t)len);
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328 | cep->sbuf_wptr += len;
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329 | cep->swbuf_count += len;
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330 | error = len;
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331 |
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332 | /* ãããã¯ã¼ã¯ãããã¡é·ã¨ IP ãã¼ã¿ã°ã©ã é·ãè¨å®ããã*/
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333 | cep->swbufq->len = (uint16_t)(cep->swbuf_count + IF_IP_TCP_HDR_SIZE);
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334 | SET_IP_SDU_SIZE(GET_IP_HDR(cep->swbufq), cep->swbuf_count + TCP_HDR_SIZE);
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335 |
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336 | /* ãã©ã°ããéä¿¡å¯è½ã«è¨å®ããã*/
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337 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_SEND_READY;
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338 | }
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339 |
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340 | else { /* éä¿¡ã¦ã¤ã³ããããã¡ãä¸æ£ */
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341 | syslog(LOG_WARNING, "[TCP] illegal window buff for send, CEP: %d, %4d < %4d.",
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342 | GET_TCP_CEPID(cep), error, IF_IP_TCP_HDR_SIZE);
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343 |
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344 | /* éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã*/
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345 | tcp_free_swbufq_cs(cep);
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346 | }
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347 |
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348 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
349 | syscall(sig_sem(cep->semid_lock));
|
---|
350 |
|
---|
351 | return error;
|
---|
352 | }
|
---|
353 |
|
---|
354 | /*
|
---|
355 | * tcp_wait_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ã¨ç¸æã®åä¿¡ã¦ã£ã³ããéãã®ãå¾
|
---|
356 | ã¤ï¼å°ç¨ï¼ã
|
---|
357 | */
|
---|
358 |
|
---|
359 | ER
|
---|
360 | tcp_wait_swbuf_cs (T_TCP_CEP *cep, TMO tmout)
|
---|
361 | {
|
---|
362 | FLGPTN flag;
|
---|
363 | SYSTIM before, after;
|
---|
364 | ER error;
|
---|
365 | int_t win;
|
---|
366 |
|
---|
367 |
|
---|
368 | /* éä¿¡ã¦ã£ã³ããããã¡ãå²å½ã¦æ¸ã¿ã§ã空ããããã°çµäºããã*/
|
---|
369 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_NBUF_READY &&
|
---|
370 | (cep->swbuf_count + IF_IP_TCP_HDR_SIZE) < net_buf_siz(cep->swbufq))
|
---|
371 | return E_OK;
|
---|
372 |
|
---|
373 | /* éä¿¡ä¸ã§ããã°ãçµäºããã¾ã§å¾
|
---|
374 | æ©ããã*/
|
---|
375 | while ((cep->flags & TCP_CEP_FLG_WBCS_MASK) != TCP_CEP_FLG_WBCS_FREE) {
|
---|
376 |
|
---|
377 | /* éä¿¡å¾
|
---|
378 | ã¡ã®æéã tmout ããæ¸ããã*/
|
---|
379 | if (!(tmout == TMO_POL || tmout == TMO_FEVR))
|
---|
380 | syscall(get_tim(&before));
|
---|
381 |
|
---|
382 | if ((error = twai_flg(cep->snd_flgid, TCP_CEP_EVT_SWBUF_READY,
|
---|
383 | TWF_ORW, &flag, tmout)) != E_OK)
|
---|
384 | return error;
|
---|
385 | syscall(clr_flg(cep->snd_flgid, (FLGPTN)(~TCP_CEP_EVT_SWBUF_READY)));
|
---|
386 |
|
---|
387 | /* éä¿¡å¾
|
---|
388 | ã¡ã®æéã tmout ããæ¸ããã*/
|
---|
389 | if (!(tmout == TMO_POL || tmout == TMO_FEVR)) {
|
---|
390 | syscall(get_tim(&after));
|
---|
391 | if (after - before > tmout)
|
---|
392 | return E_TMOUT;
|
---|
393 | tmout -= (TMO)(after - before);
|
---|
394 | }
|
---|
395 |
|
---|
396 | /*
|
---|
397 | * éä¿¡ã§ããããCEP ã® FSM ç¶æ
|
---|
398 | ãè¦ãã
|
---|
399 | * éä¿¡ã¦ã¤ã³ããããã¡ã空ãã¾ã§å¾
|
---|
400 | ã¤éã«ãéä¿¡ä¸è½ã«ãªã£ãå ´åã¯ã
|
---|
401 | * ã³ãã¯ã·ã§ã³ãåæããããã¨ãæå³ãã¦ããã
|
---|
402 | */
|
---|
403 | if (!TCP_FSM_CAN_SEND_MORE(cep->fsm_state))
|
---|
404 | return E_CLS;
|
---|
405 | }
|
---|
406 |
|
---|
407 | /* ç¸æã®åä¿¡ã¦ã£ã³ããéãã¦ããå ´åã¯ãéãã¾ã§å¾
|
---|
408 | æ©ããã*/
|
---|
409 | while (true) {
|
---|
410 |
|
---|
411 | /*
|
---|
412 | * snd_wnd: ç¸æã®åä¿¡å¯è½ã¦ã£ã³ããµã¤ãº
|
---|
413 | * snd_cwnd: 輻輳ã¦ã£ã³ããµã¤ãº
|
---|
414 | *
|
---|
415 | * win: ã©ã¡ããå°ããã¦ã£ã³ããµã¤ãºã«è¨å®ããã
|
---|
416 | */
|
---|
417 | win = cep->snd_wnd < cep->snd_cwnd ? cep->snd_wnd : cep->snd_cwnd;
|
---|
418 | if (win > 0)
|
---|
419 | break;
|
---|
420 |
|
---|
421 | /* éãå¾
|
---|
422 | ã¡ã®æéã tmout ããæ¸ããã*/
|
---|
423 | if (!(tmout == TMO_POL || tmout == TMO_FEVR))
|
---|
424 | syscall(get_tim(&before));
|
---|
425 |
|
---|
426 | if ((error = twai_flg(cep->snd_flgid, TCP_CEP_EVT_SWBUF_READY,
|
---|
427 | TWF_ORW, &flag, tmout)) != E_OK)
|
---|
428 | return error;
|
---|
429 | syscall(clr_flg(cep->snd_flgid, (FLGPTN)(~TCP_CEP_EVT_SWBUF_READY)));
|
---|
430 |
|
---|
431 | /* éãå¾
|
---|
432 | ã¡ã®æéã tmout ããæ¸ããã*/
|
---|
433 | if (!(tmout == TMO_POL || tmout == TMO_FEVR)) {
|
---|
434 | syscall(get_tim(&after));
|
---|
435 | if (after - before > tmout)
|
---|
436 | return E_TMOUT;
|
---|
437 | tmout -= (TMO)(after - before);
|
---|
438 | }
|
---|
439 |
|
---|
440 | /*
|
---|
441 | * éä¿¡ã§ããããCEP ã® FSM ç¶æ
|
---|
442 | ãè¦ãã
|
---|
443 | * éä¿¡ã¦ã¤ã³ããããã¡ã空ãã¾ã§å¾
|
---|
444 | ã¤éã«ãéä¿¡ä¸è½ã«ãªã£ãå ´åã¯ã
|
---|
445 | * ã³ãã¯ã·ã§ã³ãåæããããã¨ãæå³ãã¦ããã
|
---|
446 | */
|
---|
447 | if (!TCP_FSM_CAN_SEND_MORE(cep->fsm_state))
|
---|
448 | return E_CLS;
|
---|
449 | }
|
---|
450 |
|
---|
451 | /* ãããã¯ã¼ã¯ãããã¡ãç²å¾ããã*/
|
---|
452 | if ((error = tcp_get_segment(&cep->swbufq, cep, 0,
|
---|
453 | TCP_CFG_SWBUF_CSAVE_MIN_SIZE,
|
---|
454 | TCP_CFG_SWBUF_CSAVE_MAX_SIZE - IF_IP_TCP_HDR_SIZE,
|
---|
455 | NBA_SEARCH_DESCENT, tmout)) != E_OK)
|
---|
456 | return error;
|
---|
457 |
|
---|
458 | /* éä¿¡ã¦ã£ã³ããããã¡ãåæåããã*/
|
---|
459 | tcp_init_swbuf(cep);
|
---|
460 |
|
---|
461 | return E_OK;
|
---|
462 | }
|
---|
463 |
|
---|
464 | /*
|
---|
465 | * tcp_get_swbuf_addr_cs -- éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããï¼å°ç¨ï¼ã
|
---|
466 | */
|
---|
467 |
|
---|
468 | ER_UINT
|
---|
469 | tcp_get_swbuf_addr_cs (T_TCP_CEP *cep, void **p_buf)
|
---|
470 | {
|
---|
471 | ER_UINT error;
|
---|
472 |
|
---|
473 | /* é信端ç¹ãããã¯ããã*/
|
---|
474 | syscall(wai_sem(cep->semid_lock));
|
---|
475 |
|
---|
476 | if ((error = net_buf_siz(cep->swbufq)) > 0) {
|
---|
477 |
|
---|
478 | /*
|
---|
479 | * +-----------+--------+---------+---------+
|
---|
480 | * | Ehter HDR | IP HDR | TCP HDR | TCP SDU |
|
---|
481 | * +-----------+--------+---------+---------+
|
---|
482 | * 14 20 20 n
|
---|
483 | * <---------------- error --------------->
|
---|
484 | * ^
|
---|
485 | * net_buf 㧠4 ãªã¯ãããå¢çã«ã¢ã©ã¤ã³ããã¦ããã
|
---|
486 | *
|
---|
487 | * tcp_output 㨠ip_output ã§ããã§ãã¯ãµã ãè¨ç®ããã¨ãã
|
---|
488 | * n ã 4 ãªã¯ãããå¢çã«ãªãããã« SDU ã®å¾ãã« 0 ã
|
---|
489 | * ãããã£ã³ã°ããããã®åãèæ
|
---|
490 | ®ãã¦éä¿¡ã¦ã£ã³ããããã¡ã®
|
---|
491 | * 空ããµã¤ãºã 4 ãªã¯ãããå¢çã«èª¿æ´ããã
|
---|
492 | */
|
---|
493 | error = (uint_t)(((error - IF_IP_TCP_HDR_SIZE) >> 2 << 2) - cep->swbuf_count);
|
---|
494 |
|
---|
495 | /* éä¿¡ã¦ã¤ã³ããµã¤ãºã«ãããµã¤ãºã調æ´ããã*/
|
---|
496 | if (error > cep->snd_wnd)
|
---|
497 | error = cep->snd_wnd;
|
---|
498 | if (error > cep->snd_cwnd)
|
---|
499 | error = cep->snd_cwnd;
|
---|
500 |
|
---|
501 | /* ç¸æã®æ大åä¿¡ã»ã°ã¡ã³ããµã¤ãº (maxseg) ãè¶
|
---|
502 | ããªãããã«ããã*/
|
---|
503 | if (error > cep->maxseg)
|
---|
504 | error = cep->maxseg;
|
---|
505 |
|
---|
506 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºããã¼ã¿é·ãè¨å®ãããã®å¤ãè¿ãã*/
|
---|
507 | cep->get_buf_len = error;
|
---|
508 |
|
---|
509 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ã®å
|
---|
510 | é ãè¨å®ããã*/
|
---|
511 | *p_buf = cep->sbuf_wptr;
|
---|
512 | }
|
---|
513 |
|
---|
514 | else { /* ãããã¯ã¼ã¯ãããã¡ãä¸æ£ */
|
---|
515 |
|
---|
516 | /* éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã*/
|
---|
517 | tcp_free_swbufq_cs(cep);
|
---|
518 | }
|
---|
519 |
|
---|
520 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
521 | syscall(sig_sem(cep->semid_lock));
|
---|
522 |
|
---|
523 | return error;
|
---|
524 | }
|
---|
525 |
|
---|
526 | /*
|
---|
527 | * tcp_send_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ãéä¿¡å¯è½ã«ããï¼å°ç¨ï¼ã
|
---|
528 | */
|
---|
529 |
|
---|
530 | void
|
---|
531 | tcp_send_swbuf_cs (T_TCP_CEP *cep, uint_t len)
|
---|
532 | {
|
---|
533 | /* é信端ç¹ãããã¯ããã*/
|
---|
534 | syscall(wai_sem(cep->semid_lock));
|
---|
535 |
|
---|
536 | cep->sbuf_wptr += len;
|
---|
537 | cep->swbuf_count += len;
|
---|
538 |
|
---|
539 | /* ãããã¯ã¼ã¯ãããã¡é·ã¨ IP ãã¼ã¿ã°ã©ã é·ãè¨å®ããã*/
|
---|
540 | cep->swbufq->len = (uint16_t)(cep->swbuf_count + IF_IP_TCP_HDR_SIZE);
|
---|
541 | SET_IP_SDU_SIZE(GET_IP_HDR(cep->swbufq), len + TCP_HDR_SIZE);
|
---|
542 |
|
---|
543 | /* tcp_get_buf ã®å²å½ã¦é·ããªã»ããããã*/
|
---|
544 | cep->get_buf_len = 0;
|
---|
545 |
|
---|
546 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
547 | syscall(sig_sem(cep->semid_lock));
|
---|
548 |
|
---|
549 | /* ãã©ã°ããéä¿¡å¯è½ã«è¨å®ããå¼·å¶çã«éä¿¡ããã*/
|
---|
550 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_SEND_READY
|
---|
551 | | TCP_CEP_FLG_FORCE
|
---|
552 | | TCP_CEP_FLG_FORCE_CLEAR
|
---|
553 | | TCP_CEP_FLG_POST_OUTPUT;
|
---|
554 | }
|
---|
555 |
|
---|
556 | /*
|
---|
557 | * tcp_free_swbufq_cs -- éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®è§£æ¾ãæ示ããï¼å°ç¨ï¼ã
|
---|
558 | *
|
---|
559 | * 注æ:
|
---|
560 | * å¿
|
---|
561 | è¦ã§ããã°ããã®é¢æ°ãå¼ã³åºãåã«ãé信端ç¹ãããã¯ãã
|
---|
562 | * æ»ã£ãå¾ã解é¤ããå¿
|
---|
563 | è¦ãããã
|
---|
564 | */
|
---|
565 |
|
---|
566 | void
|
---|
567 | tcp_free_swbufq_cs (T_TCP_CEP *cep)
|
---|
568 | {
|
---|
569 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãå¾
|
---|
570 | ã¡ãåãæ¶ãã*/
|
---|
571 | cep->flags &= ~TCP_CEP_FLG_WBCS_NBUF_REQ;
|
---|
572 |
|
---|
573 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) != TCP_CEP_FLG_WBCS_FREE) {
|
---|
574 | /*
|
---|
575 | * éä¿¡ã¦ã£ã³ããããã¡ãåé¤ããããã«ããã©ã°ã ACK å®äºã«è¨å®ãã
|
---|
576 | * TCP åºåã¿ã¹ã¯ãèµ·åããã
|
---|
577 | */
|
---|
578 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_ACKED;
|
---|
579 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
580 | }
|
---|
581 | }
|
---|
582 |
|
---|
583 | /*
|
---|
584 | * tcp_alloc_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ç¨ã®ãããã¯ã¼ã¯ãããã¡ã®å²ãå½ã¦ãæ示ããï¼å°ç¨ï¼ã
|
---|
585 | */
|
---|
586 |
|
---|
587 | void
|
---|
588 | tcp_alloc_swbuf_cs (T_TCP_CEP *cep)
|
---|
589 | {
|
---|
590 | cep->flags |= TCP_CEP_FLG_WBCS_NBUF_REQ;
|
---|
591 |
|
---|
592 | /*
|
---|
593 | * éä¿¡ã¦ã£ã³ããããã¡ãæªä½¿ç¨ã®å ´åã®ã¿ã
|
---|
594 | * éä¿¡ã¦ã£ã³ããããã¡ç¨ã®ãããã¯ã¼ã¯ãããã¡ã®å²ãå½ã¦ãæ示ããã
|
---|
595 | */
|
---|
596 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_FREE)
|
---|
597 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
598 | }
|
---|
599 |
|
---|
600 | /*
|
---|
601 | * tcp_is_swbuf_full_cs -- éä¿¡ã¦ã£ã³ããããã¡ãæºæ¯ããã§ãã¯ããï¼å°ç¨ï¼ã
|
---|
602 | */
|
---|
603 |
|
---|
604 | bool_t
|
---|
605 | tcp_is_swbuf_full_cs (T_TCP_CEP *cep)
|
---|
606 | {
|
---|
607 | return (cep->flags & TCP_CEP_FLG_WBCS_MASK) != TCP_CEP_FLG_WBCS_NBUF_READY ||
|
---|
608 | cep->swbuf_count >= cep->swbufq->len - IF_IP_TCP_HDR_SIZE;
|
---|
609 | }
|
---|
610 |
|
---|
611 | /*
|
---|
612 | * tcp_init_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ãåæåããï¼å°ç¨ï¼ã
|
---|
613 | *
|
---|
614 | * 注æ: tcp_get_segment ã§ãããã¯ã¼ã¯ãããã¡ãç²å¾ãã
|
---|
615 | * ç´å¾ã«å¼ã³åºããã¨ã
|
---|
616 | */
|
---|
617 |
|
---|
618 | void
|
---|
619 | tcp_init_swbuf (T_TCP_CEP *cep)
|
---|
620 | {
|
---|
621 | /* éä¿¡ã¦ã¤ã³ããããã¡ã®ä½¿ç¨ä¸ãµã¤ãºããªã»ããããã*/
|
---|
622 | cep->swbuf_count = 0;
|
---|
623 |
|
---|
624 | /* éä¿¡ã¦ã¤ã³ããããã¡ã®ã¢ãã¬ã¹ãè¨å®ããã*/
|
---|
625 | cep->sbuf_wptr = cep->sbuf_rptr = GET_TCP_SDU(cep->swbufq, IF_IP_TCP_HDR_OFFSET);
|
---|
626 |
|
---|
627 | /* ãã©ã°ãããããã¯ã¼ã¯ãããã¡å²å½ã¦æ¸ã¿ã«è¨å®ããã*/
|
---|
628 | cep->flags = (cep->flags & ~(TCP_CEP_FLG_WBCS_NBUF_REQ | TCP_CEP_FLG_WBCS_MASK))
|
---|
629 | | TCP_CEP_FLG_WBCS_NBUF_READY;
|
---|
630 | }
|
---|
631 |
|
---|
632 | /*
|
---|
633 | * tcp_push_res_nbuf -- ãããã¯ã¼ã¯ãããã¡ãäºç´ããï¼å°ç¨ï¼ã
|
---|
634 | */
|
---|
635 |
|
---|
636 | T_NET_BUF *
|
---|
637 | tcp_push_res_nbuf (T_NET_BUF *nbuf)
|
---|
638 | {
|
---|
639 | static int_t last_ix = 0;
|
---|
640 |
|
---|
641 | T_TCP_CEP *cep;
|
---|
642 | int_t ix, sel_ix;
|
---|
643 |
|
---|
644 | if (++ last_ix == tmax_tcp_cepid)
|
---|
645 | last_ix = 0;
|
---|
646 | sel_ix = ix = last_ix;
|
---|
647 | do {
|
---|
648 | cep = &tcp_cep[ix];
|
---|
649 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_NBUF_PEND) {
|
---|
650 |
|
---|
651 | /* ãããã¯ã¼ã¯ãããã¡ãäºç´ããã*/
|
---|
652 | cep->swbufq = nbuf;
|
---|
653 | nbuf = NULL;
|
---|
654 |
|
---|
655 | /* ãã©ã°ãäºç´ã«è¨å®ããã*/
|
---|
656 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_NBUF_RSVD;
|
---|
657 | sel_ix = ix;
|
---|
658 | break;
|
---|
659 | }
|
---|
660 | if (++ ix == tmax_tcp_cepid)
|
---|
661 | ix = 0;
|
---|
662 | } while (ix != last_ix);
|
---|
663 |
|
---|
664 | last_ix = sel_ix;
|
---|
665 |
|
---|
666 | return nbuf;
|
---|
667 | }
|
---|
668 |
|
---|
669 | /*
|
---|
670 | * tcp_pull_res_nbuf -- äºç´ãã¦ãããããã¯ã¼ã¯ãããã¡è¿ãï¼å°ç¨ï¼ã
|
---|
671 | */
|
---|
672 |
|
---|
673 | T_NET_BUF *
|
---|
674 | tcp_pull_res_nbuf (ATR nbatr)
|
---|
675 | {
|
---|
676 | T_NET_BUF *nbuf;
|
---|
677 | T_TCP_CEP *cep;
|
---|
678 |
|
---|
679 | cep = GET_TCP_CEP(nbatr & NBA_ID_MASK);
|
---|
680 | if ((cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_NBUF_RSVD) {
|
---|
681 |
|
---|
682 | /* äºç´ãã¦ãããããã¯ã¼ã¯ãããã¡ãè¿ãã*/
|
---|
683 | nbuf = cep->swbufq;
|
---|
684 | cep->swbufq = NULL;
|
---|
685 |
|
---|
686 | /* TCP åºåã¿ã¹ã¯ãèµ·åããã*/
|
---|
687 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
688 | }
|
---|
689 | else
|
---|
690 | nbuf = NULL;
|
---|
691 |
|
---|
692 | return nbuf;
|
---|
693 | }
|
---|
694 |
|
---|
695 | #endif /* of #ifdef TCP_CFG_SWBUF_CSAVE */
|
---|
696 |
|
---|
697 | #ifdef TCP_CFG_RWBUF_CSAVE
|
---|
698 |
|
---|
699 | #ifndef TCP_CFG_RWBUF_CSAVE_ONLY
|
---|
700 |
|
---|
701 | /*
|
---|
702 | * TCP é信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãæå¹ãªå ´å
|
---|
703 | * ãã ããé信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ï¼cep->rbufï¼ã®å¤ã«ããã
|
---|
704 | * TCP é信端ç¹æ¯ã«åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ã使ç¨ãããã
|
---|
705 | * 使ç¨ããªãããåãæ¿ããã
|
---|
706 | */
|
---|
707 |
|
---|
708 | /*
|
---|
709 | * tcp_drop_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®æåã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
710 | */
|
---|
711 |
|
---|
712 | void
|
---|
713 | tcp_drop_rwbuf (T_TCP_CEP *cep, uint_t len)
|
---|
714 | {
|
---|
715 | if (IS_PTR_DEFINED(cep->rbuf))
|
---|
716 | tcp_drop_rwbuf_ncs(cep, len);
|
---|
717 | else
|
---|
718 | tcp_drop_rwbuf_cs(cep, len);
|
---|
719 | }
|
---|
720 |
|
---|
721 | /*
|
---|
722 | * tcp_read_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããåèªã¿åºãã
|
---|
723 | */
|
---|
724 |
|
---|
725 | uint_t
|
---|
726 | tcp_read_rwbuf (T_TCP_CEP *cep, void *data, uint_t len)
|
---|
727 | {
|
---|
728 | if (IS_PTR_DEFINED(cep->rbuf))
|
---|
729 | return tcp_read_rwbuf_ncs(cep, data, len);
|
---|
730 | else
|
---|
731 | return tcp_read_rwbuf_cs(cep, data, len);
|
---|
732 | }
|
---|
733 |
|
---|
734 | /*
|
---|
735 | * tcp_get_rwbuf_addr -- åä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããã
|
---|
736 | */
|
---|
737 |
|
---|
738 | uint_t
|
---|
739 | tcp_get_rwbuf_addr (T_TCP_CEP *cep, void **p_buf)
|
---|
740 | {
|
---|
741 | if (IS_PTR_DEFINED(cep->rbuf))
|
---|
742 | return tcp_get_rwbuf_addr_ncs(cep, p_buf);
|
---|
743 | else
|
---|
744 | return tcp_get_rwbuf_addr_cs(cep, p_buf);
|
---|
745 | }
|
---|
746 |
|
---|
747 | /*
|
---|
748 | * tcp_free_rwbufq -- åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã解æ¾ããã
|
---|
749 | */
|
---|
750 |
|
---|
751 | void
|
---|
752 | tcp_free_rwbufq (T_TCP_CEP *cep)
|
---|
753 | {
|
---|
754 | if (!IS_PTR_DEFINED(cep->rbuf))
|
---|
755 | tcp_free_rwbufq_cs(cep);
|
---|
756 | }
|
---|
757 |
|
---|
758 | /*
|
---|
759 | * tcp_write_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãã
|
---|
760 | */
|
---|
761 |
|
---|
762 | void
|
---|
763 | tcp_write_rwbuf (T_TCP_CEP *cep, T_NET_BUF *input, uint_t thoff)
|
---|
764 | {
|
---|
765 | if (IS_PTR_DEFINED(cep->rbuf))
|
---|
766 | tcp_write_rwbuf_ncs(cep, input, thoff);
|
---|
767 | else
|
---|
768 | tcp_write_rwbuf_cs(cep, input, thoff);
|
---|
769 | }
|
---|
770 |
|
---|
771 | #endif /* of #ifndef TCP_CFG_RWBUF_CSAVE_ONLY */
|
---|
772 |
|
---|
773 | /*
|
---|
774 | * TCP é信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãæå¹
|
---|
775 | */
|
---|
776 |
|
---|
777 | /*
|
---|
778 | * tcp_drop_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®æåã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
779 | */
|
---|
780 |
|
---|
781 | void
|
---|
782 | tcp_drop_rwbuf_cs (T_TCP_CEP *cep, uint_t len)
|
---|
783 | {
|
---|
784 | T_TCP_Q_HDR *qhdr;
|
---|
785 |
|
---|
786 | if (cep->rwbufq != NULL) {
|
---|
787 |
|
---|
788 | qhdr = GET_TCP_Q_HDR(cep->rwbufq, GET_TCP_IP_Q_HDR(cep->rwbufq)->thoff);
|
---|
789 | cep->rwbuf_count -= len;
|
---|
790 |
|
---|
791 | /* ãããã¯ã¼ã¯ãããã¡ã«ãã¼ã¿ãç¡ããªã£ãã解æ¾ããã*/
|
---|
792 | if (len == qhdr->slen) {
|
---|
793 | T_NET_BUF *next;
|
---|
794 |
|
---|
795 | #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES
|
---|
796 |
|
---|
797 | cep->rwbufq_entries --;
|
---|
798 |
|
---|
799 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES */
|
---|
800 |
|
---|
801 | next = qhdr->next;
|
---|
802 | syscall(rel_net_buf(cep->rwbufq));
|
---|
803 | cep->rwbufq = next;
|
---|
804 | }
|
---|
805 | else {
|
---|
806 | qhdr->slen -= len;
|
---|
807 | qhdr->soff += len;
|
---|
808 | }
|
---|
809 | }
|
---|
810 | }
|
---|
811 |
|
---|
812 | /*
|
---|
813 | * tcp_read_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããåèªã¿åºãã
|
---|
814 | */
|
---|
815 |
|
---|
816 | uint_t
|
---|
817 | tcp_read_rwbuf_cs (T_TCP_CEP *cep, void *data, uint_t len)
|
---|
818 | {
|
---|
819 | T_TCP_Q_HDR *qhdr;
|
---|
820 | uint_t blen, rlen = 0;
|
---|
821 | uint8_t *buf = (uint8_t*)data;
|
---|
822 |
|
---|
823 | /* é信端ç¹ãããã¯ããã*/
|
---|
824 | syscall(wai_sem(cep->semid_lock));
|
---|
825 |
|
---|
826 | /*
|
---|
827 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã«ãããã¯ã¼ã¯ãããã¡ãç¡ããªãã
|
---|
828 | * len ã 0 ã«ãªãã¾ã§ç¶ããã
|
---|
829 | */
|
---|
830 | while (cep->rwbufq != NULL && len > 0) {
|
---|
831 | qhdr = GET_TCP_Q_HDR(cep->rwbufq, GET_TCP_IP_Q_HDR(cep->rwbufq)->thoff);
|
---|
832 |
|
---|
833 | /*
|
---|
834 | * len ã¨åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®å
|
---|
835 | é ãããã¯ã¼ã¯ãããã¡ã®
|
---|
836 | * ãã¼ã¿æ°ã®å°ããæ¹ã移ããã¼ã¿æ°ã«ããã
|
---|
837 | */
|
---|
838 | if (len > qhdr->slen)
|
---|
839 | blen = qhdr->slen;
|
---|
840 | else
|
---|
841 | blen = len;
|
---|
842 |
|
---|
843 | memcpy(buf,
|
---|
844 | GET_TCP_SDU(cep->rwbufq, GET_TCP_IP_Q_HDR(cep->rwbufq)->thoff) + qhdr->soff,
|
---|
845 | (size_t)blen);
|
---|
846 |
|
---|
847 | /*
|
---|
848 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã«
|
---|
849 | * ãã¼ã¿ãç¡ããªã£ãã解æ¾ããã
|
---|
850 | */
|
---|
851 | tcp_drop_rwbuf_cs(cep, blen);
|
---|
852 |
|
---|
853 | buf += blen;
|
---|
854 | rlen += blen;
|
---|
855 | len -= blen;
|
---|
856 | }
|
---|
857 |
|
---|
858 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
859 | syscall(sig_sem(cep->semid_lock));
|
---|
860 |
|
---|
861 | return rlen;
|
---|
862 | }
|
---|
863 |
|
---|
864 | /*
|
---|
865 | * tcp_get_rwbuf_addr -- åä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããã
|
---|
866 | */
|
---|
867 |
|
---|
868 | uint_t
|
---|
869 | tcp_get_rwbuf_addr_cs (T_TCP_CEP *cep, void **p_buf)
|
---|
870 | {
|
---|
871 | T_TCP_Q_HDR *qhdr;
|
---|
872 | uint_t len;
|
---|
873 |
|
---|
874 | /* é信端ç¹ãããã¯ããã*/
|
---|
875 | syscall(wai_sem(cep->semid_lock));
|
---|
876 |
|
---|
877 | if (cep->rwbufq == NULL) {
|
---|
878 |
|
---|
879 | /* åä¿¡ã¦ã£ã³ããããã¡ãå
|
---|
880 | ¨ã¦éæ¾ããã¦ããã¨ãã*/
|
---|
881 | *p_buf = NULL;
|
---|
882 | len = 0;
|
---|
883 | }
|
---|
884 | else {
|
---|
885 |
|
---|
886 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ã®ã¢ãã¬ã¹ã®å
|
---|
887 | é ãè¨å®ããã*/
|
---|
888 | qhdr = GET_TCP_Q_HDR(cep->rwbufq, GET_TCP_IP_Q_HDR(cep->rwbufq)->thoff);
|
---|
889 | *p_buf = GET_TCP_SDU(cep->rwbufq, GET_TCP_IP_Q_HDR(cep->rwbufq)->thoff) + qhdr->soff;
|
---|
890 |
|
---|
891 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿é·ãè¨ç®ããã*/
|
---|
892 | len = qhdr->slen;
|
---|
893 | }
|
---|
894 |
|
---|
895 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
896 | syscall(sig_sem(cep->semid_lock));
|
---|
897 |
|
---|
898 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿é·ãè¨å®ãããã®å¤ãè¿ãã*/
|
---|
899 | cep->rcv_buf_len = len;
|
---|
900 | return len;
|
---|
901 | }
|
---|
902 |
|
---|
903 | /*
|
---|
904 | * tcp_free_rwbufq -- åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã解æ¾ããã
|
---|
905 | *
|
---|
906 | * 注æ:
|
---|
907 | * å¿
|
---|
908 | è¦ã§ããã°ããã®é¢æ°ãå¼ã³åºãåã«ãé信端ç¹ãããã¯ãã
|
---|
909 | * æ»ã£ãå¾ã解é¤ããå¿
|
---|
910 | è¦ãããã
|
---|
911 | */
|
---|
912 |
|
---|
913 | void
|
---|
914 | tcp_free_rwbufq_cs (T_TCP_CEP *cep)
|
---|
915 | {
|
---|
916 | T_NET_BUF *next;
|
---|
917 |
|
---|
918 | if (cep->rwbuf_count == 0 && cep->reassq == NULL) {
|
---|
919 | while (cep->rwbufq != NULL) {
|
---|
920 | next = GET_TCP_Q_HDR(cep->rwbufq, GET_TCP_IP_Q_HDR(cep->rwbufq)->thoff)->next;
|
---|
921 |
|
---|
922 | #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES
|
---|
923 |
|
---|
924 | cep->rwbufq_entries --;
|
---|
925 |
|
---|
926 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES */
|
---|
927 |
|
---|
928 | syscall(rel_net_buf(cep->rwbufq));
|
---|
929 | cep->rwbufq = next;
|
---|
930 | }
|
---|
931 |
|
---|
932 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ä½¿ç¨ä¸ãµã¤ãºããªã»ããããã*/
|
---|
933 | cep->rwbuf_count = 0;
|
---|
934 | }
|
---|
935 | }
|
---|
936 |
|
---|
937 | /*
|
---|
938 | * tcp_write_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãã
|
---|
939 | *
|
---|
940 | * 注æ:
|
---|
941 | * å
|
---|
942 | ¥å input ã¯ãT_TCP_Q_HDR ã«ãããªã³ã¯ããã
|
---|
943 | * 並ã¹æ¿ããçµäºãã¦ããªããã°ãªããªããã¾ãã
|
---|
944 | * 追å ãããã¼ã¿ã¯ãåä¿¡ã¦ã£ã³ããããã¡ã«åã¾ããã¨ã
|
---|
945 | */
|
---|
946 |
|
---|
947 | void
|
---|
948 | tcp_write_rwbuf_cs (T_TCP_CEP *cep, T_NET_BUF *input, uint_t thoff)
|
---|
949 | {
|
---|
950 | T_TCP_Q_HDR *qhdr;
|
---|
951 | T_NET_BUF **nextp;
|
---|
952 | uint_t inlen, last;
|
---|
953 |
|
---|
954 | /* é信端ç¹ãããã¯ããã*/
|
---|
955 | syscall(wai_sem(cep->semid_lock));
|
---|
956 |
|
---|
957 | qhdr = (T_TCP_Q_HDR*)GET_TCP_HDR(input, thoff);
|
---|
958 |
|
---|
959 | inlen = qhdr->slen;
|
---|
960 |
|
---|
961 | #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES
|
---|
962 |
|
---|
963 | if (cep->rwbufq_entries >= TCP_CFG_RWBUF_CSAVE_MAX_QUEUES &&
|
---|
964 | inlen > 0 && (qhdr->flags & TCP_FLG_FIN) == 0) {
|
---|
965 |
|
---|
966 | /*
|
---|
967 | * TCP é信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ã®ã
|
---|
968 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®æ大ã¨ã³ããªæ°ãè¶
|
---|
969 | ããã¨ãã¯ã
|
---|
970 | * åä¿¡ããã»ã°ã¡ã³ããç ´æ£ããã
|
---|
971 | * ãã ããSDU é·ã 0 ã®ã»ã°ã¡ã³ã㨠FIN ã»ã°ã¡ã³ãã¯ç ´æ£ããªãã
|
---|
972 | * ãªããæ£å¸¸ã«åä¿¡ããã»ã°ã¡ã³ããç ´æ£ãããããåéåæ°ãå¢å ããã
|
---|
973 | */
|
---|
974 | syscall(rel_net_buf(input));
|
---|
975 |
|
---|
976 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
977 | syscall(sig_sem(cep->semid_lock));
|
---|
978 | return;
|
---|
979 | }
|
---|
980 |
|
---|
981 | cep->rwbufq_entries ++;
|
---|
982 |
|
---|
983 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE_MAX_QUEUES */
|
---|
984 |
|
---|
985 | qhdr = (T_TCP_Q_HDR*)GET_TCP_HDR(input, thoff);
|
---|
986 |
|
---|
987 | /* åä¿¡æ¸ã¿ã·ã¼ã±ã³ã¹çªå·ãæ´æ°ããã*/
|
---|
988 | cep->rcv_nxt += inlen;
|
---|
989 |
|
---|
990 | /* ç·æ¥ãã¼ã¿ã® SDU è£æ£ãè¡ãã*/
|
---|
991 | if (qhdr->urp > 0 && inlen > 0) {
|
---|
992 | inlen -= qhdr->urp;
|
---|
993 | qhdr->slen -= qhdr->urp;
|
---|
994 | qhdr->urp = 0;
|
---|
995 | }
|
---|
996 |
|
---|
997 | last = cep->rwbuf_count;
|
---|
998 |
|
---|
999 | /* ãããã¯ã¼ã¯ãããã¡ãåä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®æå¾ã«é£çµããã*/
|
---|
1000 | qhdr->next = NULL;
|
---|
1001 | nextp = &cep->rwbufq;
|
---|
1002 | while (*nextp)
|
---|
1003 | nextp = &GET_TCP_Q_HDR(*nextp, GET_TCP_IP_Q_HDR(*nextp)->thoff)->next;
|
---|
1004 | *nextp = input;
|
---|
1005 |
|
---|
1006 | /*
|
---|
1007 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
1008 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
1009 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
1010 | */
|
---|
1011 | if (inlen > 0) {
|
---|
1012 | cep->rwbuf_count += inlen;
|
---|
1013 | NET_COUNT_TCP(net_count_tcp[NC_TCP_RECV_DATA_SEGS], 1);
|
---|
1014 | NET_COUNT_TCP(net_count_tcp[NC_TCP_RECV_DATA_OCTETS], inlen);
|
---|
1015 | }
|
---|
1016 |
|
---|
1017 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
1018 | syscall(sig_sem(cep->semid_lock));
|
---|
1019 |
|
---|
1020 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
1021 |
|
---|
1022 | if (cep->rcv_nblk_tfn == TFN_TCP_RCV_BUF) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
1023 |
|
---|
1024 | int_t len;
|
---|
1025 |
|
---|
1026 | qhdr = GET_TCP_Q_HDR(cep->rwbufq, GET_TCP_IP_Q_HDR(cep->rwbufq)->thoff);
|
---|
1027 | len = qhdr->slen;
|
---|
1028 |
|
---|
1029 | /*
|
---|
1030 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
1031 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
1032 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
1033 | */
|
---|
1034 | if (len > 0 || inlen == 0) {
|
---|
1035 |
|
---|
1036 | /* tcp_rcv_buf ã®å²å½ã¦é·ãè¨å®ããã*/
|
---|
1037 | cep->rcv_buf_len = len;
|
---|
1038 |
|
---|
1039 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ã¢ãã¬ã¹ãè¿ãã*/
|
---|
1040 | *cep->rcv_p_buf = GET_TCP_SDU(cep->rwbufq,
|
---|
1041 | GET_TCP_IP_Q_HDR(cep->rwbufq)->thoff) + qhdr->soff;
|
---|
1042 |
|
---|
1043 | if (IS_PTR_DEFINED(cep->callback))
|
---|
1044 |
|
---|
1045 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
1046 |
|
---|
1047 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)len);
|
---|
1048 |
|
---|
1049 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
1050 |
|
---|
1051 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
1052 |
|
---|
1053 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
1054 |
|
---|
1055 | else
|
---|
1056 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
|
---|
1057 |
|
---|
1058 | if (len == 0) {
|
---|
1059 |
|
---|
1060 | /*
|
---|
1061 | * é信端ç¹ãããã¯ãã¦ã
|
---|
1062 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
1063 | */
|
---|
1064 | syscall(wai_sem(cep->semid_lock));
|
---|
1065 | tcp_free_rwbufq_cs(cep);
|
---|
1066 | syscall(sig_sem(cep->semid_lock));
|
---|
1067 | }
|
---|
1068 | }
|
---|
1069 |
|
---|
1070 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
1071 | cep->rcv_tskid = TA_NULL;
|
---|
1072 | cep->rcv_tfn = cep->rcv_nblk_tfn = TFN_TCP_UNDEF;
|
---|
1073 | }
|
---|
1074 |
|
---|
1075 | else if (cep->rcv_nblk_tfn == TFN_TCP_RCV_DAT) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
1076 | int_t len;
|
---|
1077 |
|
---|
1078 | /* åä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãåãåºãã*/
|
---|
1079 | if ((len = tcp_read_rwbuf_cs(cep, cep->rcv_data, (uint_t)cep->rcv_len)) > 0) {
|
---|
1080 | /* ç¸æã«ã¦ã£ã³ãã¦ãµã¤ãºãå¤ãã£ããã¨ãç¥ãããããåºåããã¹ãããã*/
|
---|
1081 | cep->flags |= TCP_CEP_FLG_POST_OUTPUT;
|
---|
1082 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
1083 | }
|
---|
1084 |
|
---|
1085 | /*
|
---|
1086 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
1087 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
1088 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
1089 | */
|
---|
1090 | if (len > 0 || inlen == 0) {
|
---|
1091 |
|
---|
1092 | if (IS_PTR_DEFINED(cep->callback))
|
---|
1093 |
|
---|
1094 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
1095 |
|
---|
1096 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)len);
|
---|
1097 |
|
---|
1098 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
1099 |
|
---|
1100 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
1101 |
|
---|
1102 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
1103 |
|
---|
1104 | else
|
---|
1105 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
|
---|
1106 | }
|
---|
1107 |
|
---|
1108 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
1109 | cep->rcv_tskid = TA_NULL;
|
---|
1110 | cep->rcv_tfn = cep->rcv_nblk_tfn = TFN_TCP_UNDEF;
|
---|
1111 | }
|
---|
1112 | else {
|
---|
1113 |
|
---|
1114 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
1115 |
|
---|
1116 | if (inlen == 0 && cep->rwbuf_count == 0) {
|
---|
1117 | /*
|
---|
1118 | * åä¿¡ã¦ã£ã³ããããã¡å
|
---|
1119 | ã®ãã¼ã¿æ°ã 0 ã§ã
|
---|
1120 | * ç¸æãã FIN ãã©ã°ãä»ããã»ã°ã¡ã³ããåä¿¡ããã¨ãã¯ã
|
---|
1121 | * é信端ç¹ãããã¯ãã¦ã
|
---|
1122 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
1123 | */
|
---|
1124 | syscall(wai_sem(cep->semid_lock));
|
---|
1125 | tcp_free_rwbufq_cs(cep);
|
---|
1126 | syscall(sig_sem(cep->semid_lock));
|
---|
1127 | }
|
---|
1128 |
|
---|
1129 | /*
|
---|
1130 | * åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãå
|
---|
1131 | ¥ããã inlen == 0 ã®æãå
|
---|
1132 | ¥åã¿ã¹ã¯ãèµ·åºããã
|
---|
1133 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
1134 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
1135 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
1136 | */
|
---|
1137 | if ((last == 0 && cep->rwbuf_count > 0) || inlen == 0) {
|
---|
1138 | syscall(set_flg(cep->rcv_flgid, TCP_CEP_EVT_RWBUF_READY));
|
---|
1139 | }
|
---|
1140 |
|
---|
1141 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
1142 |
|
---|
1143 | }
|
---|
1144 |
|
---|
1145 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
1146 |
|
---|
1147 | }
|
---|
1148 |
|
---|
1149 | #endif /* of #ifdef TCP_CFG_RWBUF_CSAVE */
|
---|
1150 |
|
---|
1151 | #endif /* of #ifdef SUPPORT_TCP */
|
---|