[331] | 1 | /*
|
---|
| 2 | * TINET (TCP/IP Protocol Stack)
|
---|
| 3 | *
|
---|
| 4 | * Copyright (C) 2001-2017 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 | * @(#) $Id$
|
---|
| 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 |
|
---|
| 79 | /*
|
---|
| 80 | * udp_reply_no_port -- éä¿¡å
|
---|
| 81 | ã«ãã¼ããå®ç¾©ããã¦ããªããã¨ãéç¥ããã
|
---|
| 82 | */
|
---|
| 83 |
|
---|
| 84 | void
|
---|
| 85 | UDP_REPLY_NO_PORT (T_NET_BUF *input, uint_t off)
|
---|
| 86 | {
|
---|
| 87 | T_UDP_HDR *udph;
|
---|
| 88 |
|
---|
| 89 | udph = (T_UDP_HDR *)(input->buf + off);
|
---|
| 90 |
|
---|
| 91 | #if defined(_IP4_CFG)
|
---|
| 92 |
|
---|
| 93 | if (GET_IP_VER(input)==IPV6_VERSION) {
|
---|
| 94 |
|
---|
| 95 | /* ãã«ããã£ã¹ãã¢ãã¬ã¹ã«å±ãããã¼ã¿ã°ã©ã 㯠ICMP ã¨ã©ã¼ãéç¥ããªãã*/
|
---|
| 96 | if (!IN6_IS_ADDR_MULTICAST(&GET_IP6_HDR(input)->dst)) {
|
---|
| 97 | syslog(LOG_INFO, "[UDP] unexp port: %d.", ntohs(udph->dport));
|
---|
| 98 |
|
---|
| 99 | /* icmp6_error ã§ããããã¯ã¼ã¯ãããã¡ input ãè¿å´ããã*/
|
---|
| 100 | icmp6_error(input, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
|
---|
| 101 | }
|
---|
| 102 | else
|
---|
| 103 | syscall(rel_net_buf(input));
|
---|
| 104 | }
|
---|
| 105 | else /*if (GET_IP_VER(input)==IPV4_VERSION)*/ {
|
---|
| 106 |
|
---|
| 107 | /* ãã¼ã«ã« IP ã¢ãã¬ã¹ã«å±ãããã¼ã¿ã°ã©ã ã®ã¿ ICMP ã¨ã©ã¼ãéç¥ããã*/
|
---|
| 108 | if (ntohl(GET_IP4_HDR(input)->dst) == IF_GET_IFNET()->in4_ifaddr.addr) {
|
---|
| 109 | syslog(LOG_INFO, "[UDP] unexp port: %d.", ntohs(udph->dport));
|
---|
| 110 |
|
---|
| 111 | icmp_error(ICMP4_UNREACH_PORT, input);
|
---|
| 112 | /* icmp_error ã§ã¯ããããã¯ã¼ã¯ãããã¡ input ãè¿å´ããªãã®ã§ä¸ã¸æããã*/
|
---|
| 113 | }
|
---|
| 114 | syscall(rel_net_buf(input));
|
---|
| 115 | }
|
---|
| 116 |
|
---|
| 117 | #else /* of #if defined(_IP4_CFG) */
|
---|
| 118 |
|
---|
| 119 | NET_COUNT_MIB(udp_stats.udpNoPorts, 1);
|
---|
| 120 |
|
---|
| 121 | /* ãã«ããã£ã¹ãã¢ãã¬ã¹ã«å±ãããã¼ã¿ã°ã©ã 㯠ICMP ã¨ã©ã¼ãéç¥ããªãã*/
|
---|
| 122 | if (!IN6_IS_ADDR_MULTICAST(&GET_IP6_HDR(input)->dst)) {
|
---|
| 123 | syslog(LOG_INFO, "[UDP] unexp port: %d.", ntohs(udph->dport));
|
---|
| 124 |
|
---|
| 125 | /* icmp6_error ã§ããããã¯ã¼ã¯ãããã¡ input ãè¿å´ããã*/
|
---|
| 126 | icmp6_error(input, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
|
---|
| 127 | }
|
---|
| 128 | else
|
---|
| 129 | syscall(rel_net_buf(input));
|
---|
| 130 |
|
---|
| 131 | #endif /* of #if defined(_IP4_CFG) */
|
---|
| 132 |
|
---|
| 133 | NET_COUNT_UDP(net_count_udp.in_err_packets, 1);
|
---|
| 134 | NET_COUNT_MIB(udp_stats.udpInErrors, 1);
|
---|
| 135 | NET_COUNT_MIB(udp_stats.udpNoPorts, 1);
|
---|
| 136 | }
|
---|