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: in_subr.c 270 2017-02-09 04:03:47Z coas-nagasima $
|
---|
44 | */
|
---|
45 |
|
---|
46 | /*
|
---|
47 | * Copyright (c) 1982, 1986, 1988, 1993
|
---|
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 | #include <string.h>
|
---|
80 |
|
---|
81 | #ifdef TARGET_KERNEL_ASP
|
---|
82 |
|
---|
83 | #include <kernel.h>
|
---|
84 | #include <sil.h>
|
---|
85 | #include <t_syslog.h>
|
---|
86 | #include "kernel_cfg.h"
|
---|
87 |
|
---|
88 | #endif /* of #ifdef TARGET_KERNEL_ASP */
|
---|
89 |
|
---|
90 | #ifdef TARGET_KERNEL_JSP
|
---|
91 |
|
---|
92 | #include <s_services.h>
|
---|
93 | #include <t_services.h>
|
---|
94 | #include "kernel_id.h"
|
---|
95 |
|
---|
96 | #endif /* of #ifdef TARGET_KERNEL_JSP */
|
---|
97 |
|
---|
98 | #include <tinet_defs.h>
|
---|
99 | #include <tinet_config.h>
|
---|
100 |
|
---|
101 | #include <net/if.h>
|
---|
102 | #include <net/if_loop.h>
|
---|
103 | #include <net/if_ppp.h>
|
---|
104 | #include <net/ethernet.h>
|
---|
105 | #include <net/ppp_ipcp.h>
|
---|
106 | #include <net/net.h>
|
---|
107 | #include <net/net_var.h>
|
---|
108 | #include <net/net_buf.h>
|
---|
109 | #include <net/net_timer.h>
|
---|
110 |
|
---|
111 | #include <netinet/in.h>
|
---|
112 | #include <netinet6/in6.h>
|
---|
113 | #include <netinet/in_var.h>
|
---|
114 | #include <netinet/in_itron.h>
|
---|
115 | #include <netinet/ip.h>
|
---|
116 | #include <netinet/ip_var.h>
|
---|
117 | #include <netinet/tcp_timer.h>
|
---|
118 |
|
---|
119 | #include <net/if_var.h>
|
---|
120 |
|
---|
121 | #if defined(SUPPORT_INET4)
|
---|
122 |
|
---|
123 | /*
|
---|
124 | * in4_get_ifaddr -- ã¤ã³ã¿ãã§ã¼ã¹ã«è¨å®ããã¦ããã¢ãã¬ã¹ãè¿ãã
|
---|
125 | */
|
---|
126 |
|
---|
127 | const T_IN4_ADDR *
|
---|
128 | in4_get_ifaddr (int_t index)
|
---|
129 | {
|
---|
130 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
131 |
|
---|
132 | return &ifp->in_ifaddr.addr;
|
---|
133 | }
|
---|
134 |
|
---|
135 | /*
|
---|
136 | * ip2str -- IPv4 ã¢ãã¬ã¹ãæååã«å¤æããã
|
---|
137 | */
|
---|
138 |
|
---|
139 | char *
|
---|
140 | ip2str (char *buf, const T_IN4_ADDR *ipaddr)
|
---|
141 | {
|
---|
142 | static char addr_sbuf[NUM_IPV4ADDR_STR_BUFF][sizeof("123.123.123.123")];
|
---|
143 | static int_t bix = NUM_IPV4ADDR_STR_BUFF;
|
---|
144 |
|
---|
145 | char *start;
|
---|
146 |
|
---|
147 | if (buf == NULL) {
|
---|
148 | syscall(wai_sem(SEM_IP2STR_BUFF_LOCK));
|
---|
149 | buf = addr_sbuf[-- bix];
|
---|
150 | if (bix <= 0)
|
---|
151 | bix = NUM_IPV4ADDR_STR_BUFF;
|
---|
152 | syscall(sig_sem(SEM_IP2STR_BUFF_LOCK));
|
---|
153 | }
|
---|
154 |
|
---|
155 | start = buf;
|
---|
156 | buf += convert_hexdigit(buf, (uint_t)((*ipaddr >> 24) & 0xff), 10, 0, ' ');
|
---|
157 | *(buf ++) = '.';
|
---|
158 | buf += convert_hexdigit(buf, (uint_t)((*ipaddr >> 16) & 0xff), 10, 0, ' ');
|
---|
159 | *(buf ++) = '.';
|
---|
160 | buf += convert_hexdigit(buf, (uint_t)((*ipaddr >> 8) & 0xff), 10, 0, ' ');
|
---|
161 | *(buf ++) = '.';
|
---|
162 | buf += convert_hexdigit(buf, (uint_t)((*ipaddr ) & 0xff), 10, 0, ' ');
|
---|
163 | *buf = '\0';
|
---|
164 | return start;
|
---|
165 | }
|
---|
166 |
|
---|
167 | /*
|
---|
168 | * in4_set_header -- IPv4 ããããè¨å®ããã
|
---|
169 | */
|
---|
170 |
|
---|
171 | ER
|
---|
172 | in4_set_header (T_NET_BUF *nbuf, uint_t len,
|
---|
173 | T_IN4_ADDR *dstaddr, T_IN4_ADDR *srcaddr, uint8_t proto, uint8_t ttl)
|
---|
174 | {
|
---|
175 | T_IP4_HDR *ip4h = GET_IP4_HDR(nbuf);
|
---|
176 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
177 |
|
---|
178 | /* IP ããããè¨å®ããã*/
|
---|
179 | ip4h->vhl = IP4_MAKE_VHL(IPV4_VERSION, IP4_HDR_SIZE >> 2);
|
---|
180 | ip4h->len = htons(IP4_HDR_SIZE + len);
|
---|
181 | ip4h->proto = proto;
|
---|
182 | ip4h->ttl = ttl;
|
---|
183 | ip4h->type = 0;
|
---|
184 | ip4h->id = ip4h->flg_off = ip4h->sum = 0;
|
---|
185 |
|
---|
186 | /* IP ã¢ãã¬ã¹ãè¨å®ããã*/
|
---|
187 | ip4h->dst = htonl(*dstaddr);
|
---|
188 |
|
---|
189 | if (srcaddr == NULL || *srcaddr == IPV4_ADDRANY)
|
---|
190 | ip4h->src = htonl(ifp->in_ifaddr.addr);
|
---|
191 | else
|
---|
192 | ip4h->src = htonl(*srcaddr);
|
---|
193 |
|
---|
194 | return E_OK;
|
---|
195 | }
|
---|
196 |
|
---|
197 | /*
|
---|
198 | * in4_get_datagram -- IPv4 ãã¼ã¿ã°ã©ã ãç²å¾ããããããè¨å®ããã
|
---|
199 | */
|
---|
200 |
|
---|
201 | ER
|
---|
202 | in4_get_datagram (T_NET_BUF **nbuf, uint_t len, uint_t maxlen,
|
---|
203 | T_IN4_ADDR *dstaddr, T_IN4_ADDR *srcaddr,
|
---|
204 | uint8_t proto, uint8_t ttl, ATR nbatr, TMO tmout)
|
---|
205 | {
|
---|
206 | ER error;
|
---|
207 | uint_t align;
|
---|
208 |
|
---|
209 | /* ãã¼ã¿é·ã 4 ãªã¯ãããå¢çã«èª¿æ´ããã*/
|
---|
210 | align = (len + 3) >> 2 << 2;
|
---|
211 |
|
---|
212 | /* ãããã¯ã¼ã¯ãããã¡ãç²å¾ããã*/
|
---|
213 | if ((error = tget_net_buf_ex(nbuf, (uint_t)(IF_IP4_HDR_SIZE + align),
|
---|
214 | (uint_t)(IF_IP4_HDR_SIZE + maxlen), nbatr, tmout)) != E_OK)
|
---|
215 | return error;
|
---|
216 |
|
---|
217 | /*
|
---|
218 | * ãã大ããªãµã¤ãºã®ãããã¯ã¼ã¯ãããã¡ãç²å¾ããå ´åã®ã¿é·ãã調æ´ããã
|
---|
219 | * ããå°ããªãµã¤ãºã®ãããã¯ã¼ã¯ãããã¡ã®ç²å¾ã¯ãéä¿¡ã¦ã£ã³ããããã¡ã®
|
---|
220 | * çã³ãã¼æ©è½ã§ä½¿ç¨ãããå®éã«éä¿¡ããã¾ã§ããã¼ã¿ãµã¤ãºã¯æ±ºå®ã§ããªãã
|
---|
221 | */
|
---|
222 | if ((nbatr & NBA_SEARCH_ASCENT) != 0)
|
---|
223 | (*nbuf)->len = (uint16_t)(IF_IP4_HDR_SIZE + len);
|
---|
224 |
|
---|
225 | /* IP ããããè¨å®ããã*/
|
---|
226 | if ((error = in4_set_header(*nbuf, len, dstaddr, srcaddr, proto, ttl)) != E_OK)
|
---|
227 | return error;
|
---|
228 |
|
---|
229 | /* 4 ãªã¯ãããå¢çã¾ã§ããã£ã³ã°ã§åããã*/
|
---|
230 | if (align > len)
|
---|
231 | memset((GET_IP4_SDU(*nbuf) + len), 0, (size_t)(align - len));
|
---|
232 |
|
---|
233 | return E_OK;
|
---|
234 | }
|
---|
235 |
|
---|
236 | /*
|
---|
237 | * in4_cksum -- IPv4 ã®ãã©ã³ã¹ãã¼ã層ãããã®ãã§ãã¯ãµã ãè¨ç®ããã
|
---|
238 | *
|
---|
239 | * 注æ: æ»ãå¤ã¯ãããã¯ã¼ã¯ãã¤ããªã¼ã
|
---|
240 | */
|
---|
241 |
|
---|
242 | uint16_t
|
---|
243 | in4_cksum (T_NET_BUF *nbuf, uint8_t proto, uint_t off, uint_t len)
|
---|
244 | {
|
---|
245 | uint32_t sum;
|
---|
246 | uint_t align;
|
---|
247 |
|
---|
248 | /* 4 ãªã¯ãããå¢çã®ãã¼ã¿é· */
|
---|
249 | align = (len + 3) >> 2 << 2;
|
---|
250 |
|
---|
251 | /* 4 ãªã¯ãããå¢çã¾ã§ããã£ã³ã°ã§åããã*/
|
---|
252 | if (align > len)
|
---|
253 | memset((uint8_t*)nbuf->buf + off + len, 0, (size_t)(align - len));
|
---|
254 |
|
---|
255 | sum = in_cksum_sum(nbuf->buf + off, align)
|
---|
256 | + in_cksum_sum(&GET_IP4_HDR(nbuf)->src, sizeof(T_IN4_ADDR) * 2)
|
---|
257 | + len + proto;
|
---|
258 | sum = in_cksum_carry(sum);
|
---|
259 |
|
---|
260 | return (uint16_t)(~htons((uint16_t)sum));
|
---|
261 | }
|
---|
262 |
|
---|
263 | /*
|
---|
264 | * in_cksum -- ãã§ãã¯ãµã è¨ç®é¢æ°ãIPv4ãICMPv4 ç¨
|
---|
265 | *
|
---|
266 | * 注æ: data 㯠4 ãªã¯ãããåä½ã§ããã£ã³ã°ãããã¨ã
|
---|
267 | * data ã 2 ãªã¯ãããåä½ã«ã¢ã©ã¤ã³ããã¦ããªãã¨
|
---|
268 | * ä¾å¤ãçºçããå¯è½æ§ãããã
|
---|
269 | * len 㯠4 ãªã¯ãããåä½ã«ã¢ã©ã¤ã³ããã¦ãããã¨ã
|
---|
270 | *
|
---|
271 | * æ»ãå¤ã¯ãããã¯ã¼ã¯ãã¤ããªã¼ã
|
---|
272 | */
|
---|
273 |
|
---|
274 | uint16_t
|
---|
275 | in_cksum (void *data, uint_t len /*ãªã¯ãããåä½*/)
|
---|
276 | {
|
---|
277 | uint16_t sum;
|
---|
278 |
|
---|
279 | sum = (uint16_t)in_cksum_carry(in_cksum_sum(data, len));
|
---|
280 | return (uint16_t)(~htons(sum));
|
---|
281 | }
|
---|
282 |
|
---|
283 | /*
|
---|
284 | * in4_is_dstaddr_accept -- å®å
|
---|
285 | ã¢ãã¬ã¹ã¨ãã¦æ£ããããã§ãã¯ããã
|
---|
286 | *
|
---|
287 | * 注æ: dstaddr ã¯ã
|
---|
288 | * TINET-1.2 ãããããã¯ã¼ã¯ãã¤ããªã¼ãã
|
---|
289 | * TINET-1.1 ã¾ã§ã¯ããã¹ããã¤ããªã¼ã
|
---|
290 | */
|
---|
291 |
|
---|
292 | bool_t
|
---|
293 | in4_is_dstaddr_accept (T_IN4_ADDR *myaddr, T_IN4_ADDR *dstaddr)
|
---|
294 | {
|
---|
295 | if (*myaddr == IPV4_ADDRANY)
|
---|
296 | return ntohl(*dstaddr) == IF_GET_IFNET()->in_ifaddr.addr;
|
---|
297 | else
|
---|
298 | return ntohl(*dstaddr) == *myaddr;
|
---|
299 | }
|
---|
300 |
|
---|
301 | /*
|
---|
302 | * in4_ifawithifp -- å®å
|
---|
303 | ã¢ãã¬ã¹ã«ãµããããéä¿¡å
|
---|
304 | ã¢ãã¬ã¹ãã
|
---|
305 | * ãããã¯ã¼ã¯ã¤ã³ã¿ãã§ã¼ã¹ããæ¢ç´¢ããã
|
---|
306 | * in6_ifawithifp ãã·ãã¥ã¬ã¼ãããã ãã§ã
|
---|
307 | * ã¨ã©ã¼ãè¿ããã¨ã¯ãªãã
|
---|
308 | */
|
---|
309 |
|
---|
310 | T_IN4_IFADDR *
|
---|
311 | in4_ifawithifp (T_IFNET *ifp, T_IN4_ADDR *dst)
|
---|
312 | {
|
---|
313 | return &ifp->in_ifaddr;
|
---|
314 | }
|
---|
315 |
|
---|
316 | /*
|
---|
317 | * in4_add_ifaddr -- ã¤ã³ã¿ãã§ã¼ã¹ã« IPv4 ã¢ãã¬ã¹ãè¨å®ããã
|
---|
318 | */
|
---|
319 |
|
---|
320 | ER
|
---|
321 | in4_add_ifaddr (T_IN4_ADDR addr, T_IN4_ADDR mask)
|
---|
322 | {
|
---|
323 | T_IFNET *ifp = IF_GET_IFNET();
|
---|
324 |
|
---|
325 | ifp->in_ifaddr.addr = addr;
|
---|
326 | ifp->in_ifaddr.mask = mask;
|
---|
327 | return E_OK;
|
---|
328 | }
|
---|
329 |
|
---|
330 | #if NUM_ROUTE_ENTRY > 0
|
---|
331 |
|
---|
332 | /*
|
---|
333 | * in4_add_route -- çµè·¯è¡¨ã«ã¨ã³ããªãè¨å®ããã
|
---|
334 | */
|
---|
335 |
|
---|
336 | ER
|
---|
337 | in4_add_route (int_t index, T_IN4_ADDR target, T_IN4_ADDR mask, T_IN4_ADDR gateway)
|
---|
338 | {
|
---|
339 |
|
---|
340 | if (0 <= index && index < NUM_STATIC_ROUTE_ENTRY) {
|
---|
341 | routing_tbl[index].target = target;
|
---|
342 | routing_tbl[index].mask = mask;
|
---|
343 | routing_tbl[index].gateway = gateway;
|
---|
344 | return E_OK;
|
---|
345 | }
|
---|
346 | else
|
---|
347 | return E_PAR;
|
---|
348 | }
|
---|
349 |
|
---|
350 | #endif /* of #if NUM_ROUTE_ENTRY > 0 */
|
---|
351 |
|
---|
352 | /*
|
---|
353 | * in4_rtalloc -- ã«ã¼ãã£ã³ã°è¡¨ãæ¢ç´¢ããã
|
---|
354 | */
|
---|
355 |
|
---|
356 | T_IN4_ADDR
|
---|
357 | in4_rtalloc (T_IN4_ADDR dst)
|
---|
358 | {
|
---|
359 | int_t ix;
|
---|
360 |
|
---|
361 | for (ix = NUM_ROUTE_ENTRY; ix --; )
|
---|
362 | if ((routing_tbl[ix].flags & IN_RTF_DEFINED) &&
|
---|
363 | (dst & routing_tbl[ix].mask) == routing_tbl[ix].target) {
|
---|
364 | if (routing_tbl[ix].gateway == 0)
|
---|
365 | return dst;
|
---|
366 | else {
|
---|
367 | return routing_tbl[ix].gateway;
|
---|
368 | }
|
---|
369 | }
|
---|
370 | return dst;
|
---|
371 | }
|
---|
372 |
|
---|
373 | #if NUM_REDIRECT_ROUTE_ENTRY > 0
|
---|
374 |
|
---|
375 | /*
|
---|
376 | * in4_rtredirect -- ã«ã¼ãã£ã³ã°è¡¨ã«ã¨ã³ããªãç»é²ããã
|
---|
377 | *
|
---|
378 | * 注æ: å¼æ° tmo ã®åä½ã¯ [ms]ã
|
---|
379 | */
|
---|
380 |
|
---|
381 | void
|
---|
382 | in4_rtredirect (T_IN4_ADDR gateway, T_IN4_ADDR target, uint8_t flags, uint32_t tmo)
|
---|
383 | {
|
---|
384 | T_IN_RTENTRY *frt;
|
---|
385 |
|
---|
386 | frt = in_rtnewentry(flags, tmo);
|
---|
387 | frt->gateway = gateway;
|
---|
388 | frt->target = target;
|
---|
389 | frt->mask = 0xffffffff;
|
---|
390 | }
|
---|
391 |
|
---|
392 | #endif /* of #if NUM_REDIRECT_ROUTE_ENTRY > 0 */
|
---|
393 |
|
---|
394 | /*
|
---|
395 | * in4_timer -- IPv4 å
|
---|
396 | ±éã¿ã¤ãã¼
|
---|
397 | *
|
---|
398 | * 1ç§å¨æã§èµ·åãããã
|
---|
399 | */
|
---|
400 |
|
---|
401 | static void
|
---|
402 | in4_timer (void *ignore)
|
---|
403 | {
|
---|
404 | #if NUM_REDIRECT_ROUTE_ENTRY > 0
|
---|
405 |
|
---|
406 | in_rttimer();
|
---|
407 |
|
---|
408 | #endif /* of #if NUM_REDIRECT_ROUTE_ENTRY > 0 */
|
---|
409 |
|
---|
410 | #ifdef IP4_CFG_FRAGMENT
|
---|
411 |
|
---|
412 | ip_frag_timer();
|
---|
413 |
|
---|
414 | #endif /* of #ifdef IP4_CFG_FRAGMENT */
|
---|
415 |
|
---|
416 | timeout(in4_timer, NULL, IN_TIMER_TMO);
|
---|
417 | }
|
---|
418 |
|
---|
419 | /*
|
---|
420 | * in4_init -- IPv4 å
|
---|
421 | ±éæ©è½ãåæåããã
|
---|
422 | */
|
---|
423 |
|
---|
424 | void
|
---|
425 | in4_init (void)
|
---|
426 | {
|
---|
427 | #if NUM_REDIRECT_ROUTE_ENTRY > 0
|
---|
428 |
|
---|
429 | in_rtinit();
|
---|
430 |
|
---|
431 | #endif /* of #if NUM_REDIRECT_ROUTE_ENTRY > 0 */
|
---|
432 |
|
---|
433 | timeout(in4_timer, NULL, IN_TIMER_TMO);
|
---|
434 | }
|
---|
435 |
|
---|
436 | #endif /* of #if defined(SUPPORT_INET4) */
|
---|
437 |
|
---|
438 | #if NUM_REDIRECT_ROUTE_ENTRY > 0
|
---|
439 |
|
---|
440 | /*
|
---|
441 | * in_rtinit -- ã«ã¼ãã£ã³ã°è¡¨ãåæåããã
|
---|
442 | */
|
---|
443 |
|
---|
444 | void
|
---|
445 | in_rtinit (void)
|
---|
446 | {
|
---|
447 | int_t ix;
|
---|
448 |
|
---|
449 | for (ix = 0; ix < NUM_STATIC_ROUTE_ENTRY; ix ++)
|
---|
450 | routing_tbl[ix].flags = IN_RTF_DEFINED;
|
---|
451 |
|
---|
452 | for ( ; ix < NUM_ROUTE_ENTRY; ix ++)
|
---|
453 | routing_tbl[ix].flags = 0;
|
---|
454 | }
|
---|
455 |
|
---|
456 | /*
|
---|
457 | * in_rtnewentry -- æ°ããã¨ã³ããªãç²å¾ããã
|
---|
458 | */
|
---|
459 |
|
---|
460 | T_IN_RTENTRY *
|
---|
461 | in_rtnewentry (uint8_t flags, uint32_t tmo)
|
---|
462 | {
|
---|
463 | SYSTIM now;
|
---|
464 | T_IN_RTENTRY *rt, *frt = NULL;
|
---|
465 | int_t ix;
|
---|
466 |
|
---|
467 | /* 空ãã¨ã³ããªãæ¢ãã*/
|
---|
468 | for (ix = NUM_STATIC_ROUTE_ENTRY; ix < NUM_ROUTE_ENTRY; ix ++) {
|
---|
469 | rt = &routing_tbl[ix];
|
---|
470 | if ((routing_tbl[ix].flags & IN_RTF_DEFINED) == 0) {
|
---|
471 | frt = rt;
|
---|
472 | break;
|
---|
473 | }
|
---|
474 | }
|
---|
475 |
|
---|
476 | /* expire ã®åä½ã¯ [s]ã*/
|
---|
477 | syscall(get_tim(&now));
|
---|
478 | now /= SYSTIM_HZ;
|
---|
479 |
|
---|
480 | if (frt == NULL) {
|
---|
481 | /* 空ãããªããã°ãæå¹æéããã£ã¨ãçãã¨ã³ããªã空ãã«ããã*/
|
---|
482 | T_IN_RTENTRY *srt = NULL;
|
---|
483 | int_t diff, sdiff = INT_MAX;
|
---|
484 |
|
---|
485 | syscall(wai_sem(SEM_IN_ROUTING_TBL));
|
---|
486 | for (ix = NUM_STATIC_ROUTE_ENTRY; ix < NUM_ROUTE_ENTRY; ix ++) {
|
---|
487 | rt = &routing_tbl[ix];
|
---|
488 | diff = (int_t)(rt->expire - now);
|
---|
489 | if (diff <= 0) { /* rt->expire <= now */
|
---|
490 | /* æ¢ã«ãæå¹æéãéãã¦ããã*/
|
---|
491 | frt = rt;
|
---|
492 | break;
|
---|
493 | }
|
---|
494 | else if (diff < sdiff) {
|
---|
495 | srt = rt;
|
---|
496 | sdiff = diff;
|
---|
497 | }
|
---|
498 | }
|
---|
499 | if (frt == NULL)
|
---|
500 | frt = srt;
|
---|
501 | frt->flags = 0;
|
---|
502 | syscall(sig_sem(SEM_IN_ROUTING_TBL));
|
---|
503 | }
|
---|
504 |
|
---|
505 | frt->flags = (uint8_t)(flags | IN_RTF_DEFINED);
|
---|
506 | frt->expire = now + tmo / SYSTIM_HZ;
|
---|
507 | return frt;
|
---|
508 | }
|
---|
509 |
|
---|
510 | /*
|
---|
511 | * in_rttimer -- ã«ã¼ãã£ã³ã°è¡¨ã®ç®¡çã¿ã¤ãã¼
|
---|
512 | */
|
---|
513 |
|
---|
514 | void
|
---|
515 | in_rttimer (void)
|
---|
516 | {
|
---|
517 | SYSTIM now;
|
---|
518 | int_t ix;
|
---|
519 |
|
---|
520 | /* expire ã®åä½ã¯ [s]ã*/
|
---|
521 | syscall(get_tim(&now));
|
---|
522 | now /= SYSTIM_HZ;
|
---|
523 |
|
---|
524 | syscall(wai_sem(SEM_IN_ROUTING_TBL));
|
---|
525 | for (ix = NUM_STATIC_ROUTE_ENTRY; ix < NUM_ROUTE_ENTRY; ix ++)
|
---|
526 | if ((routing_tbl[ix].flags & IN_RTF_DEFINED) &&
|
---|
527 | (int_t)(routing_tbl[ix].expire - now) <= 0)
|
---|
528 | routing_tbl[ix].flags = 0;
|
---|
529 | syscall(sig_sem(SEM_IN_ROUTING_TBL));
|
---|
530 | }
|
---|
531 |
|
---|
532 | #endif /* of #if NUM_REDIRECT_ROUTE_ENTRY > 0 */
|
---|
533 |
|
---|
534 | /*
|
---|
535 | * in_cksum_sum -- ãã§ãã¯ãµã ã®åè¨è¨ç®é¢æ°
|
---|
536 | *
|
---|
537 | * 注æ: data 㯠4 ãªã¯ãããåä½ã§ããã£ã³ã°ãããã¨ã
|
---|
538 | * data ã 2 ãªã¯ãããåä½ã«ã¢ã©ã¤ã³ããã¦ããªãã¨
|
---|
539 | * ä¾å¤ãçºçããå¯è½æ§ãããã
|
---|
540 | * len 㯠4 ãªã¯ãããåä½ã«ã¢ã©ã¤ã³ããã¦ãããã¨ã
|
---|
541 | *
|
---|
542 | * æ»ãå¤ã¯ãã¹ããã¤ããªã¼ã
|
---|
543 | */
|
---|
544 |
|
---|
545 | uint32_t
|
---|
546 | in_cksum_sum (void *data, uint_t len /*ãªã¯ãããåä½*/)
|
---|
547 | {
|
---|
548 | uint32_t sum = 0;
|
---|
549 |
|
---|
550 | for ( ; len > 0; len -= 2) {
|
---|
551 | sum += *((uint16_t*)data);
|
---|
552 | data = (uint8_t*)data + 2;
|
---|
553 | }
|
---|
554 |
|
---|
555 | #if _NET_CFG_BYTE_ORDER == _NET_CFG_BIG_ENDIAN
|
---|
556 | return sum;
|
---|
557 | #elif _NET_CFG_BYTE_ORDER == _NET_CFG_LITTLE_ENDIAN
|
---|
558 | return ((sum >> 8) & 0xffff) + ((sum & 0xff) << 8) + ((sum >> 24) & 0xff);
|
---|
559 | #endif /* #if _NET_CFG_BYTE_ORDER == _NET_CFG_BIG_ENDIAN */
|
---|
560 |
|
---|
561 | }
|
---|
562 |
|
---|
563 | /*
|
---|
564 | * in_cksum_carry -- ãã§ãã¯ãµã ã®æ¡ä¸ãè¨ç®é¢æ°
|
---|
565 | *
|
---|
566 | * 注æ: data 㯠4 ãªã¯ãããåä½ã§ããã£ã³ã°ãããã¨ã
|
---|
567 | * data ã 2 ãªã¯ãããåä½ã«ã¢ã©ã¤ã³ããã¦ããªãã¨
|
---|
568 | * ä¾å¤ãçºçããå¯è½æ§ãããã
|
---|
569 | * len 㯠4 ãªã¯ãããåä½ã«ã¢ã©ã¤ã³ããã¦ãããã¨ã
|
---|
570 | */
|
---|
571 |
|
---|
572 | uint32_t
|
---|
573 | in_cksum_carry (uint32_t sum)
|
---|
574 | {
|
---|
575 | uint32_t carry;
|
---|
576 |
|
---|
577 | while (sum >= 0x00010000) {
|
---|
578 | carry = sum >> 16;
|
---|
579 | sum = (sum & 0xffff) + carry;
|
---|
580 | }
|
---|
581 |
|
---|
582 | return sum;
|
---|
583 | }
|
---|
584 |
|
---|
585 | /*
|
---|
586 | * in_strtfn -- API æ©è½ã³ã¼ãã®æå表ç¾ãè¿ãã
|
---|
587 | */
|
---|
588 |
|
---|
589 | const char *
|
---|
590 | in_strtfn (FN fncd)
|
---|
591 | {
|
---|
592 | switch (fncd) {
|
---|
593 |
|
---|
594 | /* TCP é¢ä¿ */
|
---|
595 |
|
---|
596 | case TFN_TCP_CRE_REP:
|
---|
597 | return "TFN_TCP_CRE_REP";
|
---|
598 | break;
|
---|
599 | case TFN_TCP_DEL_REP:
|
---|
600 | return "TFN_TCP_DEL_REP";
|
---|
601 | break;
|
---|
602 | case TFN_TCP_CRE_CEP:
|
---|
603 | return "TFN_TCP_CRE_CEP";
|
---|
604 | break;
|
---|
605 | case TFN_TCP_DEL_CEP:
|
---|
606 | return "TFN_TCP_DEL_CEP";
|
---|
607 | break;
|
---|
608 | case TFN_TCP_ACP_CEP:
|
---|
609 | return "TFN_TCP_ACP_CEP";
|
---|
610 | break;
|
---|
611 | case TFN_TCP_CON_CEP:
|
---|
612 | return "TFN_TCP_CON_CEP";
|
---|
613 | break;
|
---|
614 | case TFN_TCP_SHT_CEP:
|
---|
615 | return "TFN_TCP_SHT_CEP";
|
---|
616 | break;
|
---|
617 | case TFN_TCP_CLS_CEP:
|
---|
618 | return "TFN_TCP_CLS_CEP";
|
---|
619 | break;
|
---|
620 | case TFN_TCP_SND_DAT:
|
---|
621 | return "TFN_TCP_SND_DAT";
|
---|
622 | break;
|
---|
623 | case TFN_TCP_RCV_DAT:
|
---|
624 | return "TFN_TCP_RCV_DAT";
|
---|
625 | break;
|
---|
626 | case TFN_TCP_GET_BUF:
|
---|
627 | return "TFN_TCP_GET_BUF";
|
---|
628 | break;
|
---|
629 | case TFN_TCP_SND_BUF:
|
---|
630 | return "TFN_TCP_SND_BUF";
|
---|
631 | break;
|
---|
632 | case TFN_TCP_RCV_BUF:
|
---|
633 | return "TFN_TCP_RCV_BUF";
|
---|
634 | break;
|
---|
635 | case TFN_TCP_REL_BUF:
|
---|
636 | return "TFN_TCP_REL_BUF";
|
---|
637 | break;
|
---|
638 | case TFN_TCP_SND_OOB:
|
---|
639 | return "TFN_TCP_SND_OOB";
|
---|
640 | break;
|
---|
641 | case TFN_TCP_RCV_OOB:
|
---|
642 | return "TFN_TCP_RCV_OOB";
|
---|
643 | break;
|
---|
644 | case TFN_TCP_CAN_CEP:
|
---|
645 | return "TFN_TCP_CAN_CEP";
|
---|
646 | break;
|
---|
647 | case TFN_TCP_SET_OPT:
|
---|
648 | return "TFN_TCP_SET_OPT";
|
---|
649 | break;
|
---|
650 | case TFN_TCP_GET_OPT:
|
---|
651 | return "TFN_TCP_GET_OPT";
|
---|
652 | break;
|
---|
653 | case TFN_TCP_ALL:
|
---|
654 | return "ALL";
|
---|
655 | break;
|
---|
656 |
|
---|
657 | /* UDP é¢ä¿ */
|
---|
658 |
|
---|
659 | case TFN_UDP_CRE_CEP:
|
---|
660 | return "TFN_UDP_CRE_CEP";
|
---|
661 | break;
|
---|
662 | case TFN_UDP_DEL_CEP:
|
---|
663 | return "TFN_UDP_DEL_CEP";
|
---|
664 | break;
|
---|
665 | case TFN_UDP_SND_DAT:
|
---|
666 | return "TFN_UDP_SND_DAT";
|
---|
667 | break;
|
---|
668 | case TFN_UDP_RCV_DAT:
|
---|
669 | return "TFN_UDP_RCV_DAT";
|
---|
670 | break;
|
---|
671 | case TFN_UDP_CAN_CEP:
|
---|
672 | return "TFN_UDP_CAN_CEP";
|
---|
673 | break;
|
---|
674 | case TFN_UDP_SET_OPT:
|
---|
675 | return "TFN_UDP_SET_OPT";
|
---|
676 | break;
|
---|
677 | case TFN_UDP_GET_OPT:
|
---|
678 | return "TFN_UDP_GET_OPT";
|
---|
679 | break;
|
---|
680 |
|
---|
681 | default:
|
---|
682 | return "unknown TFN";
|
---|
683 | }
|
---|
684 | }
|
---|