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_ncs.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 | #ifndef TCP_CFG_SWBUF_CSAVE_ONLY
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135 |
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136 | /*
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137 | * TCP é信端ç¹ã®éä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãç¡å¹
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138 | */
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139 |
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140 | /*
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141 | * tcp_read_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãèªã¿åºãã
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142 | */
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143 |
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144 | void
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145 | tcp_read_swbuf_ncs (T_TCP_CEP *cep, T_NET_BUF *output, uint_t len, uint_t doff)
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146 | {
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147 | uint8_t *wptr, *rptr;
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148 |
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149 | /* SDU ã®å¤§ããããã§ãã¯ããã*/
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150 | if (GET_IP_SDU_SIZE(GET_IP_HDR(output)) < GET_TCP_HDR_SIZE2(output, IF_IP_TCP_HDR_OFFSET) + len) {
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151 | syslog(LOG_INFO, "[TCP] shrink SUD len: %d -> %d",
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152 | (uint16_t)len, (uint16_t)(GET_IP_SDU_SIZE(GET_IP_HDR(output)) - GET_TCP_HDR_SIZE2(output, IF_IP_TCP_HDR_OFFSET)));
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153 | len = GET_IP_SDU_SIZE(GET_IP_HDR(output)) - GET_TCP_HDR_SIZE2(output, IF_IP_TCP_HDR_OFFSET);
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154 | }
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155 |
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156 | wptr = GET_TCP_SDU(output, IF_IP_TCP_HDR_OFFSET);
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157 |
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158 | /* é信端ç¹ãããã¯ããã*/
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159 | syscall(wai_sem(cep->semid_lock));
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160 |
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161 | rptr = cep->sbuf_rptr + doff;
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162 | if (rptr - (uint8_t*)cep->sbuf > cep->sbufsz) {
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163 |
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164 | /* 転ééå§ãéä¿¡ã¦ã£ã³ããããã¡ã®çµãããè¶
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165 | ããã¨ãã®å¦çã*/
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166 | rptr = (uint8_t*)cep->sbuf_rptr - (cep->sbufsz - doff);
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167 | }
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168 | else if (len + (rptr - (uint8_t*)cep->sbuf) > cep->sbufsz) {
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169 | uint_t sub;
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170 |
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171 | /* 転éç¯å²ãã©ã¦ã³ãããã¨ãã®å¦ç */
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172 | sub = (uint_t)(cep->sbufsz - (rptr - (uint8_t*)cep->sbuf));
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173 | memcpy((void*)wptr, rptr, (size_t)sub);
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174 | len -= sub;
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175 | wptr += sub;
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176 | rptr = (uint8_t*)cep->sbuf;
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177 | }
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178 | memcpy((void*)wptr, rptr, (size_t)len);
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179 |
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180 | NET_COUNT_TCP(net_count_tcp[NC_TCP_SEND_DATA_SEGS], 1);
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181 | NET_COUNT_TCP(net_count_tcp[NC_TCP_SEND_DATA_OCTETS], len);
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182 |
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183 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
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184 | syscall(sig_sem(cep->semid_lock));
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185 | }
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186 |
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187 | /*
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188 | * tcp_drop_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããã
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189 | */
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190 |
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191 | void
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192 | tcp_drop_swbuf_ncs (T_TCP_CEP *cep, uint_t len)
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193 | {
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194 | uint_t last;
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195 |
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196 | /* é信端ç¹ãããã¯ããã*/
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197 | syscall(wai_sem(cep->semid_lock));
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198 |
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199 | last = cep->swbuf_count;
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200 |
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201 | if (cep->sbuf_rptr + len > (uint8_t*)cep->sbuf + cep->sbufsz)
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202 | /* ã©ã¦ã³ãããã¨ãã®è¨ç® */
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203 | cep->sbuf_rptr -= cep->sbufsz - len;
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204 | else
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205 | cep->sbuf_rptr += len;
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206 | cep->swbuf_count -= (uint16_t)len;
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207 |
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208 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
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209 | syscall(sig_sem(cep->semid_lock));
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210 |
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211 | #ifdef TCP_CFG_NON_BLOCKING
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212 |
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213 | if (cep->snd_nblk_tfn == TFN_TCP_GET_BUF) { /* ãã³ããããã³ã°ã³ã¼ã« */
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214 |
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215 | /* é信端ç¹ãããã¯ããã*/
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216 | syscall(wai_sem(cep->semid_lock));
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217 |
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218 | /* éä¿¡ãã¼ã¿é·ãè¨ç®ããã*/
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219 | if (cep->sbufsz - cep->swbuf_count > cep->sbufsz - (cep->sbuf_wptr - (uint8_t*)cep->sbuf))
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220 | /* æ¸è¾¼ã¿ãã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã¯ãæ¸è¾¼ã¿ãã¤ã³ã¿ããéä¿¡ã¦ã£ã³ããããã¡ã®çµããã¾ã§ */
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221 | len = (uint_t)(cep->sbufsz - (cep->sbuf_wptr - (uint8_t*)cep->sbuf));
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222 | else
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223 | len = cep->sbufsz - cep->swbuf_count;
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224 |
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225 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
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226 | syscall(sig_sem(cep->semid_lock));
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227 |
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228 | if (len > 0) {
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229 |
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230 | /* tcp_get_buf ã®å²å½ã¦é·ãè¨å®ããã*/
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231 | cep->get_buf_len = len;
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232 |
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233 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ã¢ãã¬ã¹ãè¿ãã*/
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234 | *cep->snd_p_buf = cep->sbuf_wptr;
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235 |
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236 | if (IS_PTR_DEFINED(cep->callback))
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237 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
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238 |
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239 | (*cep->callback)(GET_TCP_CEPID(cep), cep->snd_nblk_tfn, (void*)(uint32_t)len);
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240 |
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241 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
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242 |
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243 | (*cep->callback)(GET_TCP_CEPID(cep), cep->snd_nblk_tfn, (void*)&len);
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244 |
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245 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
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246 |
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247 | else
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248 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
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249 |
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250 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
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251 | cep->snd_tskid = TA_NULL;
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252 | cep->snd_tfn = cep->snd_nblk_tfn = TFN_TCP_UNDEF;
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253 | }
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254 | }
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255 |
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256 | #ifdef TCP_CFG_EXTENTIONS
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257 |
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258 | else if (cep->snd_nblk_tfn == TFN_TCP_SND_DAT ||
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259 | cep->snd_nblk_tfn == TFN_TCP_SND_OOB) { /* ãã³ããããã³ã°ã³ã¼ã« */
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260 |
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261 | #else /* of #ifdef TCP_CFG_EXTENTIONS */
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262 |
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263 | else if (cep->snd_nblk_tfn == TFN_TCP_SND_DAT) { /* ãã³ããããã³ã°ã³ã¼ã« */
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264 |
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265 | #endif /* of #ifdef TCP_CFG_EXTENTIONS */
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266 |
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267 | ER_UINT error;
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268 |
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269 | /* éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãã*/
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270 | error = TCP_WRITE_SWBUF(cep, cep->snd_data, (uint_t)cep->snd_len);
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271 |
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272 | #ifdef TCP_CFG_EXTENTIONS
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273 |
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274 | /* éä¿¡ç·æ¥ãã¤ã³ã¿ãè¨å®ããã*/
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275 | if (cep->snd_nblk_tfn == TFN_TCP_SND_OOB)
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276 | cep->snd_up = cep->snd_una + error;
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277 |
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278 | #endif /* of #ifdef TCP_CFG_EXTENTIONS */
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279 |
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280 | if (IS_PTR_DEFINED(cep->callback))
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281 |
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282 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
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283 |
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284 | (*cep->callback)(GET_TCP_CEPID(cep), cep->snd_nblk_tfn, (void*)error);
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285 |
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286 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
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287 |
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288 | (*cep->callback)(GET_TCP_CEPID(cep), cep->snd_nblk_tfn, (void*)&error);
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289 |
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290 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
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291 |
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292 | else
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293 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
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294 |
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295 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
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296 | cep->snd_tskid = TA_NULL;
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297 | cep->snd_tfn = cep->snd_nblk_tfn = TFN_TCP_UNDEF;
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298 | }
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299 | else {
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300 |
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301 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
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302 |
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303 | /* éä¿¡ã¦ã£ã³ããããã¡ã«ç©ºããåºæ¥ããåºåã¿ã¹ã¯ãèµ·åºããã*/
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304 | if (last == cep->sbufsz && cep->swbuf_count < cep->sbufsz)
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305 | syscall(set_flg(cep->snd_flgid, TCP_CEP_EVT_SWBUF_READY));
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306 |
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307 | #ifdef TCP_CFG_NON_BLOCKING
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308 |
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309 | }
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310 |
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311 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
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312 |
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313 | if (cep->swbuf_count > 0) {
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314 | /* éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãããã°åºåããã¹ãããã*/
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315 | cep->flags |= TCP_CEP_FLG_POST_OUTPUT;
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316 | sig_sem(SEM_TCP_POST_OUTPUT);
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317 | }
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318 | }
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319 |
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320 | /*
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321 | * tcp_write_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãã
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322 | */
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323 |
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324 | ER_UINT
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325 | tcp_write_swbuf_ncs (T_TCP_CEP *cep, void *data, uint_t len)
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326 | {
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327 | uint_t offset;
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328 |
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329 | /* é信端ç¹ãããã¯ããã*/
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330 | syscall(wai_sem(cep->semid_lock));
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331 |
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332 | /* len ã¨éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã®å°ããæ¹ã移ããã¼ã¿æ°ã«ããã*/
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333 | if (len > (cep->sbufsz - cep->swbuf_count))
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334 | len = cep->sbufsz - cep->swbuf_count;
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335 |
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336 | /* æ¸ãè¾¼ã¿ãã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã®å¦ç */
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337 | if (len > cep->sbufsz - (cep->sbuf_wptr - (uint8_t*)cep->sbuf)) {
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338 | offset = (uint_t)(cep->sbufsz - (cep->sbuf_wptr -(uint8_t*)cep->sbuf));
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339 | memcpy(cep->sbuf_wptr, data, (size_t)offset);
|
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340 | cep->sbuf_wptr = (uint8_t*)cep->sbuf;
|
---|
341 | cep->swbuf_count += offset;
|
---|
342 | }
|
---|
343 | else
|
---|
344 | offset = 0;
|
---|
345 |
|
---|
346 | memcpy(cep->sbuf_wptr, (void*)((uint8_t*)data + offset), (size_t)(len - offset));
|
---|
347 | cep->sbuf_wptr += len - offset;
|
---|
348 | cep->swbuf_count += len - offset;
|
---|
349 |
|
---|
350 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
351 | syscall(sig_sem(cep->semid_lock));
|
---|
352 |
|
---|
353 | return (ER_UINT)len;
|
---|
354 | }
|
---|
355 |
|
---|
356 | /*
|
---|
357 | * tcp_wait_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã空ãã®ãå¾
|
---|
358 | ã¤ã
|
---|
359 | */
|
---|
360 |
|
---|
361 | ER
|
---|
362 | tcp_wait_swbuf_ncs (T_TCP_CEP *cep, TMO tmout)
|
---|
363 | {
|
---|
364 | ER error;
|
---|
365 | FLGPTN flag;
|
---|
366 |
|
---|
367 | while (cep->swbuf_count >= cep->sbufsz) {
|
---|
368 | /*
|
---|
369 | * éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãããªããã°ãåºåããã¹ããã¦ã
|
---|
370 | * éä¿¡ã¦ã£ã³ããããã¡ã空ãã¾ã§å¾
|
---|
371 | ã¤ã
|
---|
372 | */
|
---|
373 | cep->flags |= TCP_CEP_FLG_POST_OUTPUT;
|
---|
374 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
375 |
|
---|
376 | if ((error = twai_flg(cep->snd_flgid, TCP_CEP_EVT_SWBUF_READY, TWF_ORW, &flag, tmout)) != E_OK) {
|
---|
377 | return error;
|
---|
378 | }
|
---|
379 | syscall(clr_flg(cep->snd_flgid, (FLGPTN)(~TCP_CEP_EVT_SWBUF_READY)));
|
---|
380 |
|
---|
381 | /*
|
---|
382 | * éä¿¡ã§ããããCEP ã® FSM ç¶æ
|
---|
383 | ãè¦ãã
|
---|
384 | * éä¿¡ã¦ã£ã³ããããã¡ã空ãã¾ã§å¾
|
---|
385 | ã¤éã«ãéä¿¡ä¸è½ã«ãªã£ãå ´åã¯ã
|
---|
386 | * ã³ãã¯ã·ã§ã³ãåæããããã¨ãæå³ãã¦ããã
|
---|
387 | */
|
---|
388 | if (!TCP_FSM_CAN_SEND_MORE(cep->fsm_state)) {
|
---|
389 | return E_CLS;
|
---|
390 | }
|
---|
391 | }
|
---|
392 |
|
---|
393 | return E_OK;
|
---|
394 | }
|
---|
395 | /*
|
---|
396 | * tcp_get_swbuf_addr -- éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããã
|
---|
397 | */
|
---|
398 |
|
---|
399 | ER_UINT
|
---|
400 | tcp_get_swbuf_addr_ncs (T_TCP_CEP *cep, void **p_buf)
|
---|
401 | {
|
---|
402 | uint_t len;
|
---|
403 |
|
---|
404 | /* é信端ç¹ãããã¯ããã*/
|
---|
405 | syscall(wai_sem(cep->semid_lock));
|
---|
406 |
|
---|
407 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ã®å
|
---|
408 | é ãè¨å®ããã*/
|
---|
409 | *p_buf = cep->sbuf_wptr;
|
---|
410 |
|
---|
411 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºããµã¤ãºãè¨ç®ããã*/
|
---|
412 | if (cep->sbufsz - cep->swbuf_count > cep->sbufsz - (cep->sbuf_wptr - (uint8_t*)cep->sbuf))
|
---|
413 | /* æ¸è¾¼ã¿ãã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã¯ãæ¸è¾¼ã¿ãã¤ã³ã¿ããéä¿¡ã¦ã£ã³ããããã¡ã®çµããã¾ã§ */
|
---|
414 | len = (uint_t)(cep->sbufsz - (cep->sbuf_wptr - (uint8_t*)cep->sbuf));
|
---|
415 | else
|
---|
416 | len = cep->sbufsz - cep->swbuf_count;
|
---|
417 |
|
---|
418 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
419 | syscall(sig_sem(cep->semid_lock));
|
---|
420 |
|
---|
421 | /* éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºããã¼ã¿é·ãè¨å®ãããã®å¤ãè¿ãã*/
|
---|
422 | cep->get_buf_len = len;
|
---|
423 | return (ER_UINT)len;
|
---|
424 | }
|
---|
425 |
|
---|
426 | /*
|
---|
427 | * tcp_send_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ãéä¿¡å¯è½ã«ããã
|
---|
428 | */
|
---|
429 |
|
---|
430 | void
|
---|
431 | tcp_send_swbuf_ncs (T_TCP_CEP *cep, uint_t len)
|
---|
432 | {
|
---|
433 | /* é信端ç¹ãããã¯ããã*/
|
---|
434 | syscall(wai_sem(cep->semid_lock));
|
---|
435 |
|
---|
436 | cep->sbuf_wptr += len;
|
---|
437 | cep->swbuf_count += len;
|
---|
438 |
|
---|
439 | /* æ¸è¾¼ã¿ãã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã®å¦ç */
|
---|
440 | if (cep->sbuf_wptr >= (uint8_t*)cep->sbuf + cep->sbufsz)
|
---|
441 | cep->sbuf_wptr = (uint8_t*)cep->sbuf;
|
---|
442 |
|
---|
443 | /* tcp_get_buf ã®å²å½ã¦é·ããªã»ããããã*/
|
---|
444 | cep->get_buf_len = 0;
|
---|
445 |
|
---|
446 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
447 | syscall(sig_sem(cep->semid_lock));
|
---|
448 |
|
---|
449 | /* éä¿¡ã¦ã£ã³ããããã¡ããã«ã®ã¨ãã¯å¼·å¶çã«éä¿¡ããã*/
|
---|
450 | if (cep->swbuf_count >= cep->sbufsz)
|
---|
451 | cep->flags |= TCP_CEP_FLG_FORCE | TCP_CEP_FLG_FORCE_CLEAR;
|
---|
452 | }
|
---|
453 |
|
---|
454 | /*
|
---|
455 | * tcp_is_swbuf_full -- éä¿¡ã¦ã£ã³ããããã¡ãæºæ¯ããã§ãã¯ããã
|
---|
456 | */
|
---|
457 |
|
---|
458 | bool_t
|
---|
459 | tcp_is_swbuf_full_ncs (T_TCP_CEP *cep)
|
---|
460 | {
|
---|
461 | return cep->swbuf_count >= cep->sbufsz;
|
---|
462 | }
|
---|
463 |
|
---|
464 | #endif /* of #ifndef TCP_CFG_SWBUF_CSAVE_ONLY */
|
---|
465 |
|
---|
466 | #ifndef TCP_CFG_RWBUF_CSAVE_ONLY
|
---|
467 |
|
---|
468 | /*
|
---|
469 | * TCP é信端ç¹ã®åä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãç¡å¹
|
---|
470 | */
|
---|
471 |
|
---|
472 | /*
|
---|
473 | * tcp_drop_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããã
|
---|
474 | */
|
---|
475 |
|
---|
476 | void
|
---|
477 | tcp_drop_rwbuf_ncs (T_TCP_CEP *cep, uint_t len)
|
---|
478 | {
|
---|
479 | cep->rwbuf_count -= len;
|
---|
480 | cep->rbuf_rptr += len;
|
---|
481 |
|
---|
482 | /* èªã¿åºããã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã®å¦ç */
|
---|
483 | if (cep->rbuf_rptr >= (uint8_t*)cep->rbuf + cep->rbufsz)
|
---|
484 | cep->rbuf_rptr = (uint8_t*)cep->rbuf;
|
---|
485 | }
|
---|
486 |
|
---|
487 | /*
|
---|
488 | * tcp_read_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããåèªã¿åºãã
|
---|
489 | */
|
---|
490 |
|
---|
491 | uint_t
|
---|
492 | tcp_read_rwbuf_ncs (T_TCP_CEP *cep, void *data, uint_t len)
|
---|
493 | {
|
---|
494 | uint_t offset;
|
---|
495 |
|
---|
496 | /* é信端ç¹ãããã¯ããã*/
|
---|
497 | syscall(wai_sem(cep->semid_lock));
|
---|
498 |
|
---|
499 | /* len ã¨åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿æ°ã®å°ããæ¹ãåãåºããã¼ã¿æ°ã«ããã*/
|
---|
500 | if (len > cep->rwbuf_count)
|
---|
501 | len = cep->rwbuf_count;
|
---|
502 |
|
---|
503 | /* èªã¿åºããã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã®å¦ç */
|
---|
504 | if (len > cep->rbufsz - (cep->rbuf_rptr - (uint8_t*)cep->rbuf)) {
|
---|
505 | offset = (uint_t)(cep->rbufsz - (cep->rbuf_rptr -(uint8_t*)cep->rbuf));
|
---|
506 | memcpy(data, cep->rbuf_rptr, (size_t)offset);
|
---|
507 | cep->rwbuf_count -= offset;
|
---|
508 | cep->rbuf_rptr = (uint8_t*)cep->rbuf;
|
---|
509 | }
|
---|
510 | else
|
---|
511 | offset = 0;
|
---|
512 |
|
---|
513 | memcpy((void*)((uint8_t*)data + offset), cep->rbuf_rptr, (size_t)(len - offset));
|
---|
514 | cep->rwbuf_count -= len - offset;
|
---|
515 | cep->rbuf_rptr += len - offset;
|
---|
516 |
|
---|
517 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
518 | syscall(sig_sem(cep->semid_lock));
|
---|
519 |
|
---|
520 | return len;
|
---|
521 | }
|
---|
522 |
|
---|
523 | /*
|
---|
524 | * tcp_get_rwbuf_addr -- åä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããã
|
---|
525 | */
|
---|
526 |
|
---|
527 | uint_t
|
---|
528 | tcp_get_rwbuf_addr_ncs (T_TCP_CEP *cep, void **p_buf)
|
---|
529 | {
|
---|
530 | uint_t len;
|
---|
531 |
|
---|
532 | /* é信端ç¹ãããã¯ããã*/
|
---|
533 | syscall(wai_sem(cep->semid_lock));
|
---|
534 |
|
---|
535 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿é·ãè¨ç®ããã*/
|
---|
536 | if (cep->rwbuf_count > cep->rbufsz - (cep->rbuf_rptr - (uint8_t*)cep->rbuf))
|
---|
537 | /* ãã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã¯åä¿¡ã¦ã£ã³ããããã¡ã®çµããã¾ã§ */
|
---|
538 | len = (uint_t)(cep->rbufsz - (cep->rbuf_rptr - (uint8_t*)cep->rbuf));
|
---|
539 | else
|
---|
540 | len = cep->rwbuf_count;
|
---|
541 |
|
---|
542 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ã®ã¢ãã¬ã¹ã®å
|
---|
543 | é ãè¨å®ããã*/
|
---|
544 | *p_buf = cep->rbuf_rptr;
|
---|
545 |
|
---|
546 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
547 | syscall(sig_sem(cep->semid_lock));
|
---|
548 |
|
---|
549 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿é·ãè¨å®ãããã®å¤ãè¿ãã*/
|
---|
550 | cep->rcv_buf_len = len;
|
---|
551 | return len;
|
---|
552 | }
|
---|
553 |
|
---|
554 | /*
|
---|
555 | * tcp_write_rwbuf -- åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãã
|
---|
556 | *
|
---|
557 | * 注æ:
|
---|
558 | * å
|
---|
559 | ¥å input ã¯ãT_TCP_Q_HDR ã«ãããªã³ã¯ããã
|
---|
560 | * 並ã¹æ¿ããçµäºãã¦ããªããã°ãªããªããã¾ãã
|
---|
561 | * 追å ãããã¼ã¿ã¯ãåä¿¡ã¦ã£ã³ããããã¡ã«åã¾ããã¨ã
|
---|
562 | */
|
---|
563 |
|
---|
564 | void
|
---|
565 | tcp_write_rwbuf_ncs (T_TCP_CEP *cep, T_NET_BUF *input, uint_t thoff)
|
---|
566 | {
|
---|
567 | T_TCP_Q_HDR *qhdr;
|
---|
568 | uint_t offset, inlen, last;
|
---|
569 |
|
---|
570 | /* é信端ç¹ãããã¯ããã*/
|
---|
571 | syscall(wai_sem(cep->semid_lock));
|
---|
572 |
|
---|
573 | qhdr = (T_TCP_Q_HDR*)GET_TCP_HDR(input, thoff);
|
---|
574 |
|
---|
575 | /* åä¿¡æ¸ã¿ã·ã¼ã±ã³ã¹çªå·ãæ´æ°ããã*/
|
---|
576 | cep->rcv_nxt += qhdr->slen;
|
---|
577 |
|
---|
578 | last = cep->rwbuf_count;
|
---|
579 | inlen = qhdr->slen;
|
---|
580 |
|
---|
581 | /* ç·æ¥ãã¼ã¿ã® SDU è£æ£ãè¡ãã*/
|
---|
582 | if (qhdr->urp > 0 && inlen > 0) {
|
---|
583 | inlen -= qhdr->urp;
|
---|
584 | qhdr->slen -= qhdr->urp;
|
---|
585 | qhdr->urp = 0;
|
---|
586 | }
|
---|
587 |
|
---|
588 | /*
|
---|
589 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
590 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
591 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
592 | */
|
---|
593 | if (inlen > 0) {
|
---|
594 |
|
---|
595 | /* æ¸ãè¾¼ã¿ãã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã®å¦ç */
|
---|
596 | if (inlen > cep->rbufsz - (cep->rbuf_wptr - (uint8_t*)cep->rbuf)) {
|
---|
597 | offset = (uint_t)(cep->rbufsz - (cep->rbuf_wptr - (uint8_t*)cep->rbuf));
|
---|
598 | memcpy(cep->rbuf_wptr, (void*)(GET_TCP_SDU(input, thoff) + qhdr->soff), (size_t)offset);
|
---|
599 | cep->rbuf_wptr = (uint8_t*)cep->rbuf;
|
---|
600 | cep->rwbuf_count += offset;
|
---|
601 | inlen -= offset;
|
---|
602 | }
|
---|
603 | else
|
---|
604 | offset = 0;
|
---|
605 |
|
---|
606 | memcpy(cep->rbuf_wptr, (void*)(GET_TCP_SDU(input, thoff) + qhdr->soff + offset), (size_t)inlen);
|
---|
607 | cep->rbuf_wptr += inlen;
|
---|
608 | cep->rwbuf_count += inlen;
|
---|
609 |
|
---|
610 | NET_COUNT_TCP(net_count_tcp[NC_TCP_RECV_DATA_SEGS], 1);
|
---|
611 | NET_COUNT_TCP(net_count_tcp[NC_TCP_RECV_DATA_OCTETS], inlen);
|
---|
612 | }
|
---|
613 |
|
---|
614 | syscall(rel_net_buf(input));
|
---|
615 |
|
---|
616 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
617 |
|
---|
618 | if (cep->rcv_nblk_tfn == TFN_TCP_RCV_BUF) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
619 |
|
---|
620 | int_t len;
|
---|
621 |
|
---|
622 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ç©ºããã¼ã¿é·ãè¨ç®ããã*/
|
---|
623 | if (cep->rwbuf_count > cep->rbufsz - (cep->rbuf_rptr - (uint8_t*)cep->rbuf)) {
|
---|
624 | /* ãã¤ã³ã¿ãã©ã¦ã³ãããã¨ãã¯åä¿¡ã¦ã£ã³ããããã¡ã®çµããã¾ã§ */
|
---|
625 | len = (uint_t)(cep->rbufsz - (cep->rbuf_rptr - (uint8_t*)cep->rbuf));
|
---|
626 | }
|
---|
627 | else
|
---|
628 | len = cep->rwbuf_count;
|
---|
629 |
|
---|
630 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
631 | syscall(sig_sem(cep->semid_lock));
|
---|
632 |
|
---|
633 | /*
|
---|
634 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
635 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
636 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
637 | */
|
---|
638 | if (len > 0 || inlen == 0) {
|
---|
639 |
|
---|
640 | /* tcp_rcv_buf ã®å²å½ã¦é·ãè¨å®ããã*/
|
---|
641 | cep->rcv_buf_len = len;
|
---|
642 |
|
---|
643 | /* åä¿¡ã¦ã£ã³ããããã¡ã®ã¢ãã¬ã¹ãè¿ãã*/
|
---|
644 | *cep->rcv_p_buf = cep->rbuf_rptr;
|
---|
645 |
|
---|
646 |
|
---|
647 | if (IS_PTR_DEFINED(cep->callback))
|
---|
648 |
|
---|
649 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
650 |
|
---|
651 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)(uint32_t)len);
|
---|
652 |
|
---|
653 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
654 |
|
---|
655 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
656 |
|
---|
657 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
658 |
|
---|
659 | else
|
---|
660 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
|
---|
661 |
|
---|
662 | if (len == 0) {
|
---|
663 |
|
---|
664 | /*
|
---|
665 | * é信端ç¹ãããã¯ãã¦ã
|
---|
666 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
667 | */
|
---|
668 | syscall(wai_sem(cep->semid_lock));
|
---|
669 | TCP_FREE_RWBUFQ(cep);
|
---|
670 | syscall(sig_sem(cep->semid_lock));
|
---|
671 | }
|
---|
672 | }
|
---|
673 |
|
---|
674 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
675 | cep->rcv_tskid = TA_NULL;
|
---|
676 | cep->rcv_tfn = cep->rcv_nblk_tfn = TFN_TCP_UNDEF;
|
---|
677 | }
|
---|
678 |
|
---|
679 | else if (cep->rcv_nblk_tfn == TFN_TCP_RCV_DAT) { /* ãã³ããããã³ã°ã³ã¼ã« */
|
---|
680 | ER_UINT len;
|
---|
681 |
|
---|
682 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
683 | syscall(sig_sem(cep->semid_lock));
|
---|
684 |
|
---|
685 | /* åä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãåãåºãã*/
|
---|
686 | if ((len = TCP_READ_RWBUF(cep, cep->rcv_data, (uint_t)cep->rcv_len)) > 0) {
|
---|
687 | /* ç¸æã«ã¦ã£ã³ãã¦ãµã¤ãºãå¤ãã£ããã¨ãç¥ãããããåºåããã¹ãããã*/
|
---|
688 | cep->flags |= TCP_CEP_FLG_POST_OUTPUT;
|
---|
689 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
690 | }
|
---|
691 |
|
---|
692 | /*
|
---|
693 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
694 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
695 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
696 | */
|
---|
697 | if (len > 0 || inlen == 0) {
|
---|
698 |
|
---|
699 | if (IS_PTR_DEFINED(cep->callback))
|
---|
700 |
|
---|
701 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
|
---|
702 |
|
---|
703 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)(uint32_t)len);
|
---|
704 |
|
---|
705 | #else /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
706 |
|
---|
707 | (*cep->callback)(GET_TCP_CEPID(cep), cep->rcv_nblk_tfn, (void*)&len);
|
---|
708 |
|
---|
709 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING_COMPAT14 */
|
---|
710 |
|
---|
711 | else
|
---|
712 | syslog(LOG_WARNING, "[TCP] no call back, CEP: %d.", GET_TCP_CEPID(cep));
|
---|
713 | }
|
---|
714 |
|
---|
715 | /* è¨æ¶ããã¦ããã¿ã¹ã¯ ID 㨠API æ©è½ã³ã¼ããã¯ãªã¢ã¼ããã*/
|
---|
716 | cep->rcv_tskid = TA_NULL;
|
---|
717 | cep->rcv_tfn = cep->rcv_nblk_tfn = TFN_TCP_UNDEF;
|
---|
718 |
|
---|
719 | }
|
---|
720 | else {
|
---|
721 |
|
---|
722 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
723 |
|
---|
724 | /* é信端ç¹ã®ããã¯ã解é¤ããã*/
|
---|
725 | syscall(sig_sem(cep->semid_lock));
|
---|
726 |
|
---|
727 | if (inlen == 0 && cep->rwbuf_count == 0) {
|
---|
728 | /*
|
---|
729 | * åä¿¡ã¦ã£ã³ããããã¡å
|
---|
730 | ã®ãã¼ã¿æ°ã 0 ã§ã
|
---|
731 | * ç¸æãã FIN ãã©ã°ãä»ããã»ã°ã¡ã³ããåä¿¡ããã¨ãã¯ã
|
---|
732 | * é信端ç¹ãããã¯ãã¦ã
|
---|
733 | * åä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã
|
---|
734 | */
|
---|
735 | syscall(wai_sem(cep->semid_lock));
|
---|
736 | TCP_FREE_RWBUFQ(cep);
|
---|
737 | syscall(sig_sem(cep->semid_lock));
|
---|
738 | }
|
---|
739 |
|
---|
740 | /*
|
---|
741 | * åä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãå
|
---|
742 | ¥ããã inlen == 0 ã®æãå
|
---|
743 | ¥åã¿ã¹ã¯ãèµ·åºããã
|
---|
744 | * FIN ãã©ã°ãä»ããã»ã°ã¡ã³ã㯠inlen == 0 ã«ãªããã¨ãããã
|
---|
745 | * ããã¯ãã¢ããªã±ã¼ã·ã§ã³ã«ãç¸æãããã以ä¸ãã¼ã¿ãéããã¦
|
---|
746 | * ããªããã¨ãç¥ãããããã§ããã
|
---|
747 | */
|
---|
748 | if ((last == 0 && cep->rwbuf_count > 0) || inlen == 0)
|
---|
749 | syscall(set_flg(cep->rcv_flgid, TCP_CEP_EVT_RWBUF_READY));
|
---|
750 |
|
---|
751 | #ifdef TCP_CFG_NON_BLOCKING
|
---|
752 |
|
---|
753 | }
|
---|
754 |
|
---|
755 | #endif /* of #ifdef TCP_CFG_NON_BLOCKING */
|
---|
756 |
|
---|
757 | }
|
---|
758 |
|
---|
759 | #endif /* of #ifndef TCP_CFG_RWBUF_CSAVE_ONLY */
|
---|
760 |
|
---|
761 | #endif /* of #ifdef SUPPORT_TCP */
|
---|