[270] | 1 | /*
|
---|
| 2 | * TINET (TCP/IP Protocol Stack)
|
---|
| 3 | *
|
---|
| 4 | * Copyright (C) 2001-2009 by Dep. of Computer Science and Engineering
|
---|
| 5 | * Tomakomai National College of Technology, JAPAN
|
---|
| 6 | *
|
---|
| 7 | * ä¸è¨èä½æ¨©è
|
---|
| 8 | ã¯ï¼ä»¥ä¸ã® (1)ï½(4) ã®æ¡ä»¶ãï¼Free Software Foundation
|
---|
| 9 | * ã«ãã£ã¦å
|
---|
| 10 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
|
---|
| 11 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
|
---|
| 12 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
|
---|
| 13 | å¸ï¼ä»¥ä¸ï¼
|
---|
| 14 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
|
---|
| 15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
|
---|
| 16 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
|
---|
| 17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
|
---|
| 18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
|
---|
| 19 | * ç¨ã§ããå½¢ã§åé
|
---|
| 20 | å¸ããå ´åã«ã¯ï¼åé
|
---|
| 21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
|
---|
| 22 | * è
|
---|
| 23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
|
---|
| 24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
|
---|
| 25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
|
---|
| 26 | * ç¨ã§ããªãå½¢ã§åé
|
---|
| 27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®æ¡ä»¶ãæºãããã¨ï¼
|
---|
| 28 | * (a) åé
|
---|
| 29 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
|
---|
| 30 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
|
---|
| 31 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
|
---|
| 32 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
|
---|
| 33 | * 害ãããï¼ä¸è¨èä½æ¨©è
|
---|
| 34 | ããã³TOPPERSããã¸ã§ã¯ããå
|
---|
| 35 | 責ãããã¨ï¼
|
---|
| 36 | *
|
---|
| 37 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
|
---|
| 38 | ã
|
---|
| 39 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
|
---|
| 40 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
|
---|
| 41 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
|
---|
| 42 | *
|
---|
| 43 | * @(#) $Id: tcp_subr_cs.c 270 2017-02-09 04:03:47Z coas-nagasima $
|
---|
| 44 | */
|
---|
| 45 |
|
---|
| 46 | /*
|
---|
| 47 | * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
|
---|
| 48 | * The Regents of the University of California. All rights reserved.
|
---|
| 49 | *
|
---|
| 50 | * Redistribution and use in source and binary forms, with or without
|
---|
| 51 | * modification, are permitted provided that the following conditions
|
---|
| 52 | * are met:
|
---|
| 53 | * 1. Redistributions of source code must retain the above copyright
|
---|
| 54 | * notice, this list of conditions and the following disclaimer.
|
---|
| 55 | * 2. Redistributions in binary form must reproduce the above copyright
|
---|
| 56 | * notice, this list of conditions and the following disclaimer in the
|
---|
| 57 | * documentation and/or other materials provided with the distribution.
|
---|
| 58 | * 3. All advertising materials mentioning features or use of this software
|
---|
| 59 | * must display the following acknowledgement:
|
---|
| 60 | * This product includes software developed by the University of
|
---|
| 61 | * California, Berkeley and its contributors.
|
---|
| 62 | * 4. Neither the name of the University nor the names of its contributors
|
---|
| 63 | * may be used to endorse or promote products derived from this software
|
---|
| 64 | * without specific prior written permission.
|
---|
| 65 | *
|
---|
| 66 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
---|
| 67 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
| 68 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
---|
| 69 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
---|
| 70 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
---|
| 71 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
---|
| 72 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
---|
| 73 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
---|
| 74 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
---|
| 75 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
---|
| 76 | * SUCH DAMAGE.
|
---|
| 77 | *
|
---|
| 78 | * @(#)tcp_subr.c 8.2 (Berkeley) 5/24/95
|
---|
| 79 | * $FreeBSD: src/sys/netinet/tcp_subr.c,v 1.49.2.4 1999/08/29 16:29:55 peter Exp $
|
---|
| 80 | */
|
---|
| 81 |
|
---|
| 82 | #include <string.h>
|
---|
| 83 |
|
---|
| 84 | #ifdef TARGET_KERNEL_ASP
|
---|
| 85 |
|
---|
| 86 | #include <kernel.h>
|
---|
| 87 | #include <sil.h>
|
---|
| 88 | #include <t_syslog.h>
|
---|
| 89 | #include "kernel_cfg.h"
|
---|
| 90 |
|
---|
| 91 | #endif /* of #ifdef TARGET_KERNEL_ASP */
|
---|
| 92 |
|
---|
| 93 | #ifdef TARGET_KERNEL_JSP
|
---|
| 94 |
|
---|
| 95 | #include <s_services.h>
|
---|
| 96 | #include <t_services.h>
|
---|
| 97 | #include "kernel_id.h"
|
---|
| 98 |
|
---|
| 99 | #endif /* of #ifdef TARGET_KERNEL_JSP */
|
---|
| 100 |
|
---|
| 101 | #include <tinet_defs.h>
|
---|
| 102 | #include <tinet_config.h>
|
---|
| 103 |
|
---|
| 104 | #include <net/if.h>
|
---|
| 105 | #include <net/if_ppp.h>
|
---|
| 106 | #include <net/if_loop.h>
|
---|
| 107 | #include <net/ethernet.h>
|
---|
| 108 | #include <net/if_arp.h>
|
---|
| 109 | #include <net/ppp_ipcp.h>
|
---|
| 110 | #include <net/net.h>
|
---|
| 111 | #include <net/net_var.h>
|
---|
| 112 | #include <net/net_buf.h>
|
---|
| 113 | #include <net/net_timer.h>
|
---|
| 114 | #include <net/net_count.h>
|
---|
| 115 |
|
---|
| 116 | #include <netinet/in.h>
|
---|
| 117 | #include <netinet6/in6.h>
|
---|
| 118 | #include <netinet6/in6_var.h>
|
---|
| 119 | #include <netinet/in_var.h>
|
---|
| 120 | #include <netinet/ip.h>
|
---|
| 121 | #include <netinet/ip_var.h>
|
---|
| 122 | #include <netinet/ip6.h>
|
---|
| 123 | #include <netinet6/ip6_var.h>
|
---|
| 124 | #include <netinet6/nd6.h>
|
---|
| 125 | #include <netinet/tcp.h>
|
---|
| 126 | #include <netinet/tcp_timer.h>
|
---|
| 127 | #include <netinet/tcp_var.h>
|
---|
| 128 | #include <netinet/tcp_fsm.h>
|
---|
| 129 | #include <netinet/tcp_seq.h>
|
---|
| 130 | #include <netinet/in_itron.h>
|
---|
| 131 |
|
---|
| 132 | #ifdef SUPPORT_TCP
|
---|
| 133 |
|
---|
| 134 | #ifdef TCP_CFG_SWBUF_CSAVE
|
---|
| 135 |
|
---|
| 136 | #ifndef TCP_CFG_SWBUF_CSAVE_ONLY
|
---|
| 137 |
|
---|
| 138 | /*
|
---|
| 139 | * TCP é信端ç¹ã®éä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ãæå¹ãªå ´å
|
---|
| 140 | * ãã ããé信端ç¹ã®éä¿¡ã¦ã£ã³ããããã¡ï¼cep->sbufï¼ã®å¤ã«ããã
|
---|
| 141 | * TCP é信端ç¹æ¯ã«éä¿¡ã¦ã£ã³ããããã¡ã®çã³ãã¼æ©è½ã使ç¨ãããã
|
---|
| 142 | * 使ç¨ããªãããåãæ¿ããã
|
---|
| 143 | */
|
---|
| 144 |
|
---|
| 145 | /*
|
---|
| 146 | * tcp_drop_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããï¼é¸æï¼ã
|
---|
| 147 | */
|
---|
| 148 |
|
---|
| 149 | void
|
---|
| 150 | tcp_drop_swbuf (T_TCP_CEP *cep, uint_t len)
|
---|
| 151 | {
|
---|
| 152 | if (IS_PTR_DEFINED(cep->sbuf))
|
---|
| 153 | tcp_drop_swbuf_ncs(cep, len);
|
---|
| 154 | else
|
---|
| 155 | tcp_drop_swbuf_cs(cep, len);
|
---|
| 156 | }
|
---|
| 157 |
|
---|
| 158 | /*
|
---|
| 159 | * tcp_write_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãï¼é¸æï¼ã
|
---|
| 160 | */
|
---|
| 161 |
|
---|
| 162 | ER_UINT
|
---|
| 163 | tcp_write_swbuf (T_TCP_CEP *cep, void *data, uint_t len)
|
---|
| 164 | {
|
---|
| 165 | if (IS_PTR_DEFINED(cep->sbuf))
|
---|
| 166 | return tcp_write_swbuf_ncs(cep, data, len);
|
---|
| 167 | else
|
---|
| 168 | return tcp_write_swbuf_cs(cep, data, len);
|
---|
| 169 | }
|
---|
| 170 |
|
---|
| 171 | /*
|
---|
| 172 | * tcp_read_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ãããã¼ã¿ãèªã¿åºãï¼é¸æï¼ã
|
---|
| 173 | */
|
---|
| 174 |
|
---|
| 175 | void
|
---|
| 176 | tcp_read_swbuf (T_TCP_CEP *cep, T_NET_BUF *output, uint_t len, uint_t doff)
|
---|
| 177 | {
|
---|
| 178 | if (IS_PTR_DEFINED(cep->sbuf))
|
---|
| 179 | tcp_read_swbuf_ncs(cep, output, len, doff);
|
---|
| 180 | }
|
---|
| 181 |
|
---|
| 182 | /*
|
---|
| 183 | * tcp_wait_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã¨ç¸æã®åä¿¡ã¦ã£ã³ããéãã®ãå¾
|
---|
| 184 | ã¤ï¼é¸æï¼ã
|
---|
| 185 | */
|
---|
| 186 |
|
---|
| 187 | ER
|
---|
| 188 | tcp_wait_swbuf (T_TCP_CEP *cep, TMO tmout)
|
---|
| 189 | {
|
---|
| 190 | if (IS_PTR_DEFINED(cep->sbuf))
|
---|
| 191 | return tcp_wait_swbuf_ncs(cep, tmout);
|
---|
| 192 | else
|
---|
| 193 | return tcp_wait_swbuf_cs(cep, tmout);
|
---|
| 194 | }
|
---|
| 195 |
|
---|
| 196 | /*
|
---|
| 197 | * tcp_get_swbuf_addr -- éä¿¡ã¦ã£ã³ããããã¡ã®ç©ºãã¢ãã¬ã¹ãç²å¾ããï¼é¸æï¼ã
|
---|
| 198 | */
|
---|
| 199 |
|
---|
| 200 | ER_UINT
|
---|
| 201 | tcp_get_swbuf_addr (T_TCP_CEP *cep, void **p_buf)
|
---|
| 202 | {
|
---|
| 203 | if (IS_PTR_DEFINED(cep->sbuf))
|
---|
| 204 | return tcp_get_swbuf_addr_ncs(cep, p_buf);
|
---|
| 205 | else
|
---|
| 206 | return tcp_get_swbuf_addr_cs(cep, p_buf);
|
---|
| 207 | }
|
---|
| 208 |
|
---|
| 209 | /*
|
---|
| 210 | * tcp_send_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ã®ãã¼ã¿ãéä¿¡å¯è½ã«ããï¼é¸æï¼ã
|
---|
| 211 | */
|
---|
| 212 |
|
---|
| 213 | void
|
---|
| 214 | tcp_send_swbuf (T_TCP_CEP *cep, uint_t len)
|
---|
| 215 | {
|
---|
| 216 | if (IS_PTR_DEFINED(cep->sbuf))
|
---|
| 217 | tcp_send_swbuf_ncs(cep, len);
|
---|
| 218 | else
|
---|
| 219 | tcp_send_swbuf_cs(cep, len);
|
---|
| 220 | }
|
---|
| 221 |
|
---|
| 222 | /*
|
---|
| 223 | * tcp_free_swbufq -- éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®è§£æ¾ãæ示ããï¼é¸æï¼ã
|
---|
| 224 | */
|
---|
| 225 |
|
---|
| 226 | void
|
---|
| 227 | tcp_free_swbufq (T_TCP_CEP *cep)
|
---|
| 228 | {
|
---|
| 229 | if (!IS_PTR_DEFINED(cep->sbuf))
|
---|
| 230 | tcp_free_swbufq_cs(cep);
|
---|
| 231 | }
|
---|
| 232 |
|
---|
| 233 | /*
|
---|
| 234 | * tcp_alloc_swbuf -- éä¿¡ã¦ã£ã³ããããã¡ç¨ã®ãããã¯ã¼ã¯ãããã¡ã®å²ãå½ã¦ãæ示ããï¼é¸æï¼ã
|
---|
| 235 | */
|
---|
| 236 |
|
---|
| 237 | void
|
---|
| 238 | tcp_alloc_swbuf (T_TCP_CEP *cep)
|
---|
| 239 | {
|
---|
| 240 | if (!IS_PTR_DEFINED(cep->sbuf))
|
---|
| 241 | tcp_alloc_swbuf_cs(cep);
|
---|
| 242 | }
|
---|
| 243 |
|
---|
| 244 | /*
|
---|
| 245 | * tcp_is_swbuf_full -- éä¿¡ã¦ã£ã³ããããã¡ãæºæ¯ããã§ãã¯ããï¼é¸æï¼ã
|
---|
| 246 | */
|
---|
| 247 |
|
---|
| 248 | bool_t
|
---|
| 249 | tcp_is_swbuf_full (T_TCP_CEP *cep)
|
---|
| 250 | {
|
---|
| 251 | if (IS_PTR_DEFINED(cep->sbuf))
|
---|
| 252 | return tcp_is_swbuf_full_ncs(cep);
|
---|
| 253 | else
|
---|
| 254 | return tcp_is_swbuf_full_cs(cep);
|
---|
| 255 | }
|
---|
| 256 |
|
---|
| 257 | #endif /* of #ifndef TCP_CFG_SWBUF_CSAVE_ONLY */
|
---|
| 258 |
|
---|
| 259 | /*
|
---|
| 260 | * tcp_drop_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããï¼å°ç¨ï¼ã
|
---|
| 261 | */
|
---|
| 262 |
|
---|
| 263 | void
|
---|
| 264 | tcp_drop_swbuf_cs (T_TCP_CEP *cep, uint_t len)
|
---|
| 265 | {
|
---|
| 266 |
|
---|
| 267 | /*éä¿¡ã¦ã£ã³ããããã¡ããæå®ããããªã¯ãããååé¤ããã*/
|
---|
| 268 | cep->swbuf_count -= (uint16_t)len;
|
---|
| 269 |
|
---|
| 270 | /* éä¿¡æ¸ã¿ã§ãACKå¾
|
---|
| 271 | ã¡ã®æã¯ãACKå®äºã«å¤æ´ããã*/
|
---|
| 272 | if (len > 0 && (cep->flags & TCP_CEP_FLG_WBCS_MASK) == TCP_CEP_FLG_WBCS_SENT) {
|
---|
| 273 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_ACKED;
|
---|
| 274 | sig_sem(SEM_TCP_POST_OUTPUT);
|
---|
| 275 | }
|
---|
| 276 | }
|
---|
| 277 |
|
---|
| 278 | /*
|
---|
| 279 | * tcp_write_swbuf_cs -- éä¿¡ã¦ã£ã³ããããã¡ã«ãã¼ã¿ãæ¸ãè¾¼ãï¼å°ç¨ï¼ã
|
---|
| 280 | */
|
---|
| 281 |
|
---|
| 282 | ER_UINT
|
---|
| 283 | tcp_write_swbuf_cs (T_TCP_CEP *cep, void *data, uint_t len)
|
---|
| 284 | {
|
---|
| 285 | ER_UINT error;
|
---|
| 286 |
|
---|
| 287 | /* é信端ç¹ãããã¯ããã*/
|
---|
| 288 | syscall(wai_sem(cep->semid_lock));
|
---|
| 289 |
|
---|
| 290 | if ((error = net_buf_siz(cep->swbufq)) > 0 && error >= IF_IP_TCP_HDR_SIZE) {
|
---|
| 291 |
|
---|
| 292 |
|
---|
| 293 | /*
|
---|
| 294 | * +-----------+--------+---------+---------+
|
---|
| 295 | * | Ehter HDR | IP HDR | TCP HDR | TCP SDU |
|
---|
| 296 | * +-----------+--------+---------+---------+
|
---|
| 297 | * 14 20 20 n
|
---|
| 298 | * <---------------- error --------------->
|
---|
| 299 | * ^
|
---|
| 300 | * net_buf 㧠4 ãªã¯ãããå¢çã«ã¢ã©ã¤ã³ããã¦ããã
|
---|
| 301 | *
|
---|
| 302 | * tcp_output 㨠ip_output ã§ããã§ãã¯ãµã ãè¨ç®ããã¨ãã
|
---|
| 303 | * n ã 4 ãªã¯ãããå¢çã«ãªãããã« SDU ã®å¾ãã« 0 ã
|
---|
| 304 | * ãããã£ã³ã°ããããã®åãèæ
|
---|
| 305 | ®ãã¦éä¿¡ã¦ã£ã³ããããã¡ã®
|
---|
| 306 | * 空ããµã¤ãºã 4 ãªã¯ãããå¢çã«èª¿æ´ããã
|
---|
| 307 | */
|
---|
| 308 | error = (uint_t)(((error - IF_IP_TCP_HDR_SIZE) >> 2 << 2) + IF_IP_TCP_HDR_SIZE);
|
---|
| 309 |
|
---|
| 310 | if (len > cep->sbufsz - cep->swbuf_count)
|
---|
| 311 | len = (uint_t)(cep->sbufsz - cep->swbuf_count);
|
---|
| 312 | if (len > (error - IF_IP_TCP_HDR_SIZE))
|
---|
| 313 | len = (uint_t)(error - IF_IP_TCP_HDR_SIZE);
|
---|
| 314 |
|
---|
| 315 | /* éä¿¡ã¦ã¤ã³ããµã¤ãºã«ãããµã¤ãºã調æ´ããã*/
|
---|
| 316 | if (len > cep->snd_wnd)
|
---|
| 317 | len = cep->snd_wnd;
|
---|
| 318 | if (len > cep->snd_cwnd)
|
---|
| 319 | len = cep->snd_cwnd;
|
---|
| 320 |
|
---|
| 321 | /* ç¸æã®æ大åä¿¡ã»ã°ã¡ã³ããµã¤ãº (maxseg) ãè¶
|
---|
| 322 | ããªãããã«ããã*/
|
---|
| 323 | if (len > cep->maxseg)
|
---|
| 324 | len = cep->maxseg;
|
---|
| 325 |
|
---|
| 326 | /* ãã¼ã¿ã移ãã*/
|
---|
| 327 | memcpy(cep->sbuf_wptr, (void*)((uint8_t*)data), (size_t)len);
|
---|
| 328 | cep->sbuf_wptr += len;
|
---|
| 329 | cep->swbuf_count += len;
|
---|
| 330 | error = len;
|
---|
| 331 |
|
---|
| 332 | /* ãããã¯ã¼ã¯ãããã¡é·ã¨ IP ãã¼ã¿ã°ã©ã é·ãè¨å®ããã*/
|
---|
| 333 | cep->swbufq->len = (uint16_t)(cep->swbuf_count + IF_IP_TCP_HDR_SIZE);
|
---|
| 334 | SET_IP_SDU_SIZE(GET_IP_HDR(cep->swbufq), cep->swbuf_count + TCP_HDR_SIZE);
|
---|
| 335 |
|
---|
| 336 | /* ãã©ã°ããéä¿¡å¯è½ã«è¨å®ããã*/
|
---|
| 337 | cep->flags = (cep->flags & ~TCP_CEP_FLG_WBCS_MASK) | TCP_CEP_FLG_WBCS_SEND_READY;
|
---|
| 338 | }
|
---|
| 339 |
|
---|
| 340 | else { /* éä¿¡ã¦ã¤ã³ããããã¡ãä¸æ£ */
|
---|
| 341 | syslog(LOG_WARNING, "[TCP] illegal window buff for send, CEP: %d, %4d < %4d.",
|
---|
| 342 | GET_TCP_CEPID(cep), error, IF_IP_TCP_HDR_SIZE);
|
---|
| 343 |
|
---|
| 344 | /* éä¿¡ã¦ã£ã³ããããã¡ãã¥ã¼ã®ãããã¯ã¼ã¯ãããã¡ã解æ¾ããã*/
|
---|
| 345 | tcp_free_swbufq_cs(cep);
|
---|
| 346 | }
|
---|
| 347 |
|
---|
| 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 */
|
---|