1 | /*
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2 | * TINET (TCP/IP Protocol Stack)
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3 | *
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4 | * Copyright (C) 2001-2017 by Dep. of Computer Science and Engineering
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5 | * Tomakomai National College of Technology, JAPAN
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6 | *
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7 | * ä¸è¨èä½æ¨©è
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8 | ã¯ï¼ä»¥ä¸ã® (1)ï½(4) ã®æ¡ä»¶ãï¼Free Software Foundation
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9 | * ã«ãã£ã¦å
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10 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
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11 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
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12 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
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13 | å¸ï¼ä»¥ä¸ï¼
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14 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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16 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
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17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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19 | * ç¨ã§ããå½¢ã§åé
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20 | å¸ããå ´åã«ã¯ï¼åé
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21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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22 | * è
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23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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26 | * ç¨ã§ããªãå½¢ã§åé
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27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®æ¡ä»¶ãæºãããã¨ï¼
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28 | * (a) åé
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29 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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30 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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31 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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32 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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33 | * 害ãããï¼ä¸è¨èä½æ¨©è
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34 | ããã³TOPPERSããã¸ã§ã¯ããå
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35 | 責ãããã¨ï¼
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36 | *
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37 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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38 | ã
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39 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
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40 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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41 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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42 | *
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43 | * @(#) $Id$
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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 |
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79 | #if (API_PROTO == API_PROTO_IPV6) || (TNUM_UDP4_CEPID > 0)
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80 |
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81 | /*
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82 | * udp_input_select -- UDP ã®å
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83 | ¥åå¦çã®é¸æ
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84 | */
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85 |
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86 | void
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87 | UDP_INPUT_SELECT (T_UDP_CEP *cep, T_NET_BUF *input, uint_t off)
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88 | {
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89 | T_UDP_HDR *udph;
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90 | T_UDP_RCV_DAT_PARA para;
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91 |
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92 | udph = (T_UDP_HDR *)(input->buf + off);
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93 | para.len = (uint_t)(ntohs(udph->ulen) - UDP_HDR_SIZE);
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94 |
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95 | if (cep->rcv_tskid != TA_NULL) { /* éãã³ããããã³ã°ã³ã¼ã«ã§ãã³ãã£ã³ã°ä¸ */
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96 | if (psnd_dtq(cep->rcvqid, (intptr_t)input) != E_OK) {
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97 | NET_COUNT_UDP(net_count_udp.in_err_packets, 1);
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98 | NET_COUNT_MIB(udp_stats.udpInErrors, 1);
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99 | syscall(rel_net_buf(input));
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100 | }
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101 | }
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102 |
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103 | #ifdef UDP_CFG_NON_BLOCKING
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104 |
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105 | else if (cep->rcv_p_dstaddr != NULL) { /* ãã³ããããã³ã°ã³ã¼ã«ã§ãã³ãã£ã³ã°ä¸ */
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106 |
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107 | /* p_dstaddr ãè¨å®ããã*/
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108 | cep->rcv_p_dstaddr->portno = ntohs(udph->sport);
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109 | IN_COPY_TO_HOST(&cep->rcv_p_dstaddr->ipaddr, input);
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110 |
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111 | /* ãã¼ã¿ããããã¡ã«ç§»ãã*/
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112 | memcpy(cep->rcv_data, GET_UDP_SDU(input, off),
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113 | (size_t)(para.len < cep->rcv_len ? para.len : cep->rcv_len));
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114 | syscall(rel_net_buf(input));
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115 |
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116 | if (IS_PTR_DEFINED(cep->callback))
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117 |
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118 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
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119 | (*cep->callback)(GET_UDP_CEPID(cep), TFN_UDP_RCV_DAT, (void*)(uint32_t)para.len);
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120 | #else
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121 | (*cep->callback)(GET_UDP_CEPID(cep), TFN_UDP_RCV_DAT, (void*)¶.len);
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122 | #endif
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123 | else
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124 | syslog(LOG_WARNING, "[UDP] no call back, CEP: %d.", GET_UDP_CEPID(cep));
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125 | cep->rcv_p_dstaddr = NULL;
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126 | }
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127 |
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128 | #endif/* of #ifdef UDP_CFG_NON_BLOCKING */
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129 |
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130 | else if (IS_PTR_DEFINED(cep->callback)) {
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131 |
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132 | /* ã³ã¼ã«ããã¯é¢æ°ãå¼ã³åºãã*/
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133 | cep->cb_netbuf = input;
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134 |
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135 | #ifdef TCP_CFG_NON_BLOCKING_COMPAT14
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136 | (*cep->callback)(GET_UDP_CEPID(cep), TEV_UDP_RCV_DAT, (void*)(uint32_t)para.len);
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137 | #else
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138 | para.input = input;
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139 | para.off = off;
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140 | #if API_PROTO == API_PROTO_IPV4
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141 | para.rep4.portno = ntohs(udph->sport);
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142 | IN_COPY_TO_HOST(¶.rep4.ipaddr, input);
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143 | #else
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144 | para.rep6.portno = ntohs(udph->sport);
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145 | IN_COPY_TO_HOST(¶.rep6.ipaddr, input);
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146 | #endif
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147 | (*cep->callback)(GET_UDP_CEPID(cep), TEV_UDP_RCV_DAT, (void*)¶.len);
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148 | #endif
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149 | /*
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150 | * ãããã¯ã¼ã¯ãããã¡ããã®ã¾ã¾ã§ããã°ãã³ã¼ã«ããã¯é¢æ°å
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151 | ã§
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152 | * ãã¼ã¿ãèªã¿åºããªãã£ããã¨ã«ãªãã®ã§ãæ¨ã¦ãã
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153 | */
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154 | if (cep->cb_netbuf != NULL) {
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155 | if ((input->flags & NB_FLG_NOREL_IFOUT) == 0)
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156 | syscall(rel_net_buf(cep->cb_netbuf));
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157 | cep->cb_netbuf = NULL;
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158 | }
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159 | }
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160 | else {
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161 | NET_COUNT_UDP(net_count_udp.in_err_packets, 1);
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162 | NET_COUNT_MIB(udp_stats.udpInErrors, 1);
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163 | syscall(rel_net_buf(input));
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164 | }
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165 |
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166 | }
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167 |
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168 | #endif /* of #if (API_PROTO == API_PROTO_IPV6) || (TNUM_UDP4_CEPID > 0) */
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169 |
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170 | /*
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171 | * udp_input -- UDP ã®å
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172 | ¥åé¢æ°
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173 | */
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174 |
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175 | uint_t
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176 | UDP_INPUT (T_NET_BUF **inputp, uint_t *offp, uint_t *nextp)
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177 | {
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178 | T_NET_BUF *input = *inputp;
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179 | T_UDP_CEP *cep;
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180 | T_UDP_HDR *udph;
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181 | uint_t hlen, ulen;
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182 |
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183 | #if defined(_IP6_CFG) && defined(_IP4_CFG) && API_PROTO == API_PROTO_IPV4
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184 | T_UDP6_CEP *cep6;
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185 | #endif
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186 |
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187 | hlen = (uint_t)GET_IF_IP_HDR_SIZE(input);
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188 |
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189 | NET_COUNT_UDP(net_count_udp.in_octets, input->len - hlen);
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190 | NET_COUNT_UDP(net_count_udp.in_packets, 1);
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191 | NET_COUNT_MIB(udp_stats.udpInDatagrams, 1);
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192 |
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193 | /* ãããé·ããã§ãã¯ããã*/
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194 | if (input->len < hlen + UDP_HDR_SIZE)
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195 | goto buf_rel;
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196 |
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197 | udph = (T_UDP_HDR *)(input->buf + *offp);
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198 |
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199 | /* ãã¼ã¿ã°ã©ã é·ããã§ãã¯ãã */
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200 | ulen = ntohs(udph->ulen);
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201 | if (ulen != input->len - hlen)
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202 | goto buf_rel;
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203 |
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204 | /* å®å
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205 | ãã¼ãã 0 ã®ãã¼ã¿ã°ã©ã ã¯ç ´æ£ãããRFC768 */
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206 | if (udph->dport == 0)
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207 | goto buf_rel;
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208 |
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209 | #ifdef UDP_CFG_IN_CHECKSUM
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210 |
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211 | /* ãã§ãã¯ãµã ããã§ãã¯ãã */
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212 | if (udph->sum && IN_CKSUM(input, IPPROTO_UDP, *offp, ulen) != 0)
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213 | goto buf_rel;
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214 |
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215 | #endif /* of #ifdef UDP_CFG_IN_CHECKSUM */
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216 |
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217 | #if defined(_IP6_CFG) && defined(_IP4_CFG) && API_PROTO == API_PROTO_IPV4
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218 |
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219 | #if TNUM_UDP4_CEPID > 0
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220 |
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221 | /* UDP é信端ç¹ãå¾ãã*/
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222 | cep = udp4_find_cep(input, *offp);
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223 |
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224 | if (cep != NULL)
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225 | udp4_input_select(cep, input, *offp);
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226 | else if ((cep6 = udp6_find_cep(input, *offp)) != NULL)
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227 | udp6_input_select(cep6, input, *offp);
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228 | else
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229 | udp4_reply_no_port(input, *offp);
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230 |
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231 | return IPPROTO_DONE;
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232 |
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233 | #else /* of #if TNUM_UDP4_CEPID > 0 */
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234 |
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235 | cep = 0; /* warning åé¿ç¨ã®ããã¼ */
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236 | if ((cep6 = udp6_find_cep(input, *offp)) != NULL)
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237 | udp6_input_select(cep6, input, *offp);
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238 | else
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239 | udp4_reply_no_port(input, *offp);
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240 |
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241 | return IPPROTO_DONE;
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242 |
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243 | #endif /* of #if TNUM_UDP4_CEPID > 0 */
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244 |
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245 | #else /* of #if defined(_IP6_CFG) && defined(_IP4_CFG) && API_PROTO == API_PROTO_IPV4 */
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246 |
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247 | /* UDP é信端ç¹ãå¾ãã*/
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248 | cep = UDP_FIND_CEP(input, *offp);
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249 |
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250 | if (cep != NULL)
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251 | UDP_INPUT_SELECT(cep, input, *offp);
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252 | else
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253 | UDP_REPLY_NO_PORT(input, *offp);
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254 |
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255 | return IPPROTO_DONE;
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256 |
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257 | #endif /* of #if defined(_IP6_CFG) && defined(_IP4_CFG) && API_PROTO == API_PROTO_IPV4 */
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258 |
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259 | buf_rel:
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260 | NET_COUNT_UDP(net_count_udp.in_err_packets, 1);
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261 | NET_COUNT_MIB(udp_stats.udpInErrors, 1);
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262 | syscall(rel_net_buf(input));
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263 | return IPPROTO_DONE;
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264 | }
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