| 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: udpn_input.c 388 2019-05-22 11:25:18Z coas-nagasima $
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| 44 | */
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| 45 |
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| 46 | /*
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| 47 | * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
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| 48 | * The Regents of the University of California. All rights reserved.
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| 49 | *
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| 50 | * Redistribution and use in source and binary forms, with or without
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| 51 | * modification, are permitted provided that the following conditions
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| 52 | * are met:
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| 53 | * 1. Redistributions of source code must retain the above copyright
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| 54 | * notice, this list of conditions and the following disclaimer.
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| 55 | * 2. Redistributions in binary form must reproduce the above copyright
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| 56 | * notice, this list of conditions and the following disclaimer in the
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| 57 | * documentation and/or other materials provided with the distribution.
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| 58 | * 3. All advertising materials mentioning features or use of this software
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| 59 | * must display the following acknowledgement:
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| 60 | * This product includes software developed by the University of
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| 61 | * California, Berkeley and its contributors.
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| 62 | * 4. Neither the name of the University nor the names of its contributors
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| 63 | * may be used to endorse or promote products derived from this software
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| 64 | * without specific prior written permission.
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| 65 | *
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| 66 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 67 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 68 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 69 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 70 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 71 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 72 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 73 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 74 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 75 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 76 | * SUCH DAMAGE.
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| 77 | */
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| 78 |
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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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