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30a4f2a8 | 1 | /* |
30a4f2a8 | 2 | * DEBUG: section 14 IP Cache |
3 | * AUTHOR: Harvest Derived | |
4 | * | |
2b6662ba | 5 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 6 | * ---------------------------------------------------------- |
30a4f2a8 | 7 | * |
2b6662ba | 8 | * Squid is the result of efforts by numerous individuals from |
9 | * the Internet community; see the CONTRIBUTORS file for full | |
10 | * details. Many organizations have provided support for Squid's | |
11 | * development; see the SPONSORS file for full details. Squid is | |
12 | * Copyrighted (C) 2001 by the Regents of the University of | |
13 | * California; see the COPYRIGHT file for full details. Squid | |
14 | * incorporates software developed and/or copyrighted by other | |
15 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 16 | * |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2 of the License, or | |
20 | * (at your option) any later version. | |
26ac0430 | 21 | * |
30a4f2a8 | 22 | * This program is distributed in the hope that it will be useful, |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
26ac0430 | 26 | * |
30a4f2a8 | 27 | * You should have received a copy of the GNU General Public License |
28 | * along with this program; if not, write to the Free Software | |
cbdec147 | 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 30 | * |
019dd986 | 31 | */ |
44a47c6e | 32 | |
33 | #include "squid.h" | |
aa839030 | 34 | #include "cbdata.h" |
a553a5a3 | 35 | #include "event.h" |
62ee09ca | 36 | #include "CacheManager.h" |
985c86bc | 37 | #include "SquidTime.h" |
e6ccf245 | 38 | #include "Store.h" |
d295d770 | 39 | #include "wordlist.h" |
9837e5f0 | 40 | #include "ip/IpAddress.h" |
44a47c6e | 41 | |
63be0a78 | 42 | /** |
43 | \defgroup IPCacheAPI IP Cache API | |
44 | \ingroup Components | |
45 | \section Introduction Introduction | |
46 | \par | |
47 | * The IP cache is a built-in component of squid providing | |
48 | * Hostname to IP-Number translation functionality and managing | |
49 | * the involved data-structures. Efficiency concerns require | |
50 | * mechanisms that allow non-blocking access to these mappings. | |
51 | * The IP cache usually doesn't block on a request except for | |
52 | * special cases where this is desired (see below). | |
53 | * | |
54 | \todo IP Cache should have its own API *.h header file. | |
55 | */ | |
56 | ||
57 | /** | |
58 | \defgroup IPCacheInternal IP Cache Internals | |
59 | \ingroup IPCacheAPI | |
60 | \todo when IP cache is provided as a class. These sub-groups will be obsolete | |
61 | * for now they are used to seperate the public and private functions. | |
62 | * with the private ones all being in IPCachInternal and public in IPCacheAPI | |
63 | * | |
64 | \section InternalOperation Internal Operation | |
65 | * | |
66 | * Internally, the execution flow is as follows: On a miss, | |
67 | * ipcache_getnbhostbyname checks whether a request for | |
68 | * this name is already pending, and if positive, it creates | |
69 | * a new entry using ipcacheAddNew with the IP_PENDING | |
70 | * flag set . Then it calls ipcacheAddPending to add a | |
71 | * request to the queue together with data and handler. Else, | |
72 | * ipcache_dnsDispatch() is called to directly create a | |
73 | * DNS query or to ipcacheEnqueue() if all no DNS port | |
74 | * is free. ipcache_call_pending() is called regularly | |
75 | * to walk down the pending list and call handlers. LRU clean-up | |
76 | * is performed through ipcache_purgelru() according to | |
77 | * the ipcache_high threshold. | |
78 | */ | |
79 | ||
80 | /// \ingroup IPCacheAPI | |
ecc3091b | 81 | typedef struct _ipcache_entry ipcache_entry; |
82 | ||
63be0a78 | 83 | /** |
84 | \ingroup IPCacheAPI | |
85 | * | |
86 | * The data structure used for storing name-address mappings | |
87 | * is a small hashtable (static hash_table *ip_table), | |
88 | * where structures of type ipcache_entry whose most | |
89 | * interesting members are: | |
90 | */ | |
26ac0430 | 91 | struct _ipcache_entry { |
186477c1 | 92 | hash_link hash; /* must be first */ |
ecc3091b | 93 | time_t lastref; |
94 | time_t expires; | |
95 | ipcache_addrs addrs; | |
96 | IPH *handler; | |
97 | void *handlerData; | |
98 | char *error_message; | |
62e76326 | 99 | |
ecc3091b | 100 | struct timeval request_time; |
101 | dlink_node lru; | |
ac06f720 | 102 | unsigned short locks; |
bae9832d | 103 | #if DNS_CNAME |
cc192b50 | 104 | unsigned short cname_wait; |
bae9832d | 105 | #endif |
62e76326 | 106 | |
26ac0430 | 107 | struct { |
3d0ac046 HN |
108 | unsigned int negcached:1; |
109 | unsigned int fromhosts:1; | |
2fadd50d | 110 | } flags; |
ecc3091b | 111 | }; |
112 | ||
63be0a78 | 113 | /// \ingroup IPCacheInternal |
26ac0430 | 114 | static struct _ipcache_stats { |
30a4f2a8 | 115 | int requests; |
f88bb09c | 116 | int replies; |
30a4f2a8 | 117 | int hits; |
118 | int misses; | |
30a4f2a8 | 119 | int negative_hits; |
22b245f8 | 120 | int numeric_hits; |
bae9832d | 121 | int rr_a; |
122 | int rr_aaaa; | |
123 | int rr_cname; | |
124 | int cname_only; | |
22b245f8 | 125 | int invalid; |
2fadd50d | 126 | } IpcacheStats; |
090089c4 | 127 | |
63be0a78 | 128 | /// \ingroup IPCacheInternal |
ce75f381 | 129 | static dlink_list lru_list; |
7b04dad5 | 130 | |
74addf6c | 131 | static FREE ipcacheFreeEntry; |
7b724b86 | 132 | #if USE_DNSSERVERS |
74addf6c | 133 | static HLPCB ipcacheHandleReply; |
7b724b86 | 134 | #else |
135 | static IDNSCB ipcacheHandleReply; | |
136 | #endif | |
cc192b50 | 137 | static IPH ipcacheHandleCnameRecurse; |
74addf6c | 138 | static int ipcacheExpiredEntry(ipcache_entry *); |
7b724b86 | 139 | #if USE_DNSSERVERS |
7ba8d0b8 | 140 | static int ipcacheParse(ipcache_entry *, const char *buf); |
7b724b86 | 141 | #else |
7ba8d0b8 | 142 | static int ipcacheParse(ipcache_entry *, rfc1035_rr *, int, const char *error); |
7b724b86 | 143 | #endif |
f5b8bbc4 | 144 | static ipcache_entry *ipcache_get(const char *); |
74addf6c | 145 | static void ipcacheLockEntry(ipcache_entry *); |
f5b8bbc4 | 146 | static void ipcacheStatPrint(ipcache_entry *, StoreEntry *); |
147 | static void ipcacheUnlockEntry(ipcache_entry *); | |
cc192b50 | 148 | static void ipcacheRelease(ipcache_entry *, bool dofree = true); |
30a4f2a8 | 149 | |
63be0a78 | 150 | /// \ingroup IPCacheInternal |
e5f6c5c2 | 151 | static ipcache_addrs static_addrs; |
63be0a78 | 152 | /// \ingroup IPCacheInternal |
365e5b34 | 153 | static hash_table *ip_table = NULL; |
090089c4 | 154 | |
63be0a78 | 155 | /// \ingroup IPCacheInternal |
24382924 | 156 | static long ipcache_low = 180; |
63be0a78 | 157 | /// \ingroup IPCacheInternal |
24382924 | 158 | static long ipcache_high = 200; |
f88bb09c | 159 | |
c021888f | 160 | #if LIBRESOLV_DNS_TTL_HACK |
161 | extern int _dns_ttl_; | |
162 | #endif | |
163 | ||
63be0a78 | 164 | /** |
165 | \ingroup IPCacheInternal | |
166 | * | |
167 | * removes the given ipcache entry | |
168 | */ | |
b8d8561b | 169 | static void |
cc192b50 | 170 | ipcacheRelease(ipcache_entry * i, bool dofree) |
090089c4 | 171 | { |
26ac0430 | 172 | if (!i) { |
cc192b50 | 173 | debugs(14, 0, "ipcacheRelease: Releasing entry with i=<NULL>"); |
174 | return; | |
175 | } | |
176 | ||
26ac0430 | 177 | if (!i || !i->hash.key) { |
cc192b50 | 178 | debugs(14, 0, "ipcacheRelease: Releasing entry without hash link!"); |
179 | return; | |
180 | } | |
181 | ||
bf8fe701 | 182 | debugs(14, 3, "ipcacheRelease: Releasing entry for '" << (const char *) i->hash.key << "'"); |
183 | ||
ecc3091b | 184 | hash_remove_link(ip_table, (hash_link *) i); |
7b04dad5 | 185 | dlinkDelete(&i->lru, &lru_list); |
26ac0430 | 186 | if (dofree) |
cc192b50 | 187 | ipcacheFreeEntry(i); |
090089c4 | 188 | } |
189 | ||
63be0a78 | 190 | /// \ingroup IPCacheInternal |
b8d8561b | 191 | static ipcache_entry * |
0ee4272b | 192 | ipcache_get(const char *name) |
090089c4 | 193 | { |
ecc3091b | 194 | if (ip_table != NULL) |
62e76326 | 195 | return (ipcache_entry *) hash_lookup(ip_table, name); |
ecc3091b | 196 | else |
62e76326 | 197 | return NULL; |
090089c4 | 198 | } |
199 | ||
63be0a78 | 200 | /// \ingroup IPCacheInternal |
b8d8561b | 201 | static int |
202 | ipcacheExpiredEntry(ipcache_entry * i) | |
30a4f2a8 | 203 | { |
0e70aa1e | 204 | /* all static entries are locked, so this takes care of them too */ |
62e76326 | 205 | |
620da955 | 206 | if (i->locks != 0) |
62e76326 | 207 | return 0; |
208 | ||
7c63efed | 209 | if (i->addrs.count == 0) |
62e76326 | 210 | if (0 == i->flags.negcached) |
211 | return 1; | |
212 | ||
af00901c | 213 | if (i->expires > squid_curtime) |
62e76326 | 214 | return 0; |
215 | ||
30a4f2a8 | 216 | return 1; |
217 | } | |
090089c4 | 218 | |
63be0a78 | 219 | /// \ingroup IPCacheAPI |
7b04dad5 | 220 | void |
221 | ipcache_purgelru(void *voidnotused) | |
222 | { | |
223 | dlink_node *m; | |
224 | dlink_node *prev = NULL; | |
225 | ipcache_entry *i; | |
226 | int removed = 0; | |
52040193 | 227 | eventAdd("ipcache_purgelru", ipcache_purgelru, NULL, 10.0, 1); |
62e76326 | 228 | |
7b04dad5 | 229 | for (m = lru_list.tail; m; m = prev) { |
62e76326 | 230 | if (memInUse(MEM_IPCACHE_ENTRY) < ipcache_low) |
231 | break; | |
232 | ||
233 | prev = m->prev; | |
234 | ||
235 | i = (ipcache_entry *)m->data; | |
236 | ||
237 | if (i->locks != 0) | |
238 | continue; | |
239 | ||
240 | ipcacheRelease(i); | |
241 | ||
242 | removed++; | |
7b04dad5 | 243 | } |
62e76326 | 244 | |
bf8fe701 | 245 | debugs(14, 9, "ipcache_purgelru: removed " << removed << " entries"); |
7b04dad5 | 246 | } |
247 | ||
63be0a78 | 248 | /** |
249 | \ingroup IPCacheInternal | |
250 | * | |
251 | * purges entries added from /etc/hosts (or whatever). | |
252 | */ | |
0e70aa1e | 253 | static void |
254 | purge_entries_fromhosts(void) | |
255 | { | |
256 | dlink_node *m = lru_list.head; | |
257 | ipcache_entry *i = NULL, *t; | |
62e76326 | 258 | |
0e70aa1e | 259 | while (m) { |
62e76326 | 260 | if (i != NULL) { /* need to delay deletion */ |
261 | ipcacheRelease(i); /* we just override locks */ | |
262 | i = NULL; | |
263 | } | |
264 | ||
265 | t = (ipcache_entry*)m->data; | |
266 | ||
267 | if (t->flags.fromhosts) | |
268 | i = t; | |
269 | ||
270 | m = m->next; | |
0e70aa1e | 271 | } |
62e76326 | 272 | |
0e70aa1e | 273 | if (i != NULL) |
62e76326 | 274 | ipcacheRelease(i); |
0e70aa1e | 275 | } |
276 | ||
63be0a78 | 277 | /** |
278 | \ingroup IPCacheInternal | |
279 | * | |
280 | * create blank ipcache_entry | |
281 | */ | |
b8d8561b | 282 | static ipcache_entry * |
ecc3091b | 283 | ipcacheCreateEntry(const char *name) |
090089c4 | 284 | { |
7b04dad5 | 285 | static ipcache_entry *i; |
e6ccf245 | 286 | i = (ipcache_entry *)memAllocate(MEM_IPCACHE_ENTRY); |
186477c1 | 287 | i->hash.key = xstrdup(name); |
7b04dad5 | 288 | i->expires = squid_curtime + Config.negativeDnsTtl; |
7b04dad5 | 289 | return i; |
090089c4 | 290 | } |
291 | ||
63be0a78 | 292 | /// \ingroup IPCacheInternal |
b8d8561b | 293 | static void |
ecc3091b | 294 | ipcacheAddEntry(ipcache_entry * i) |
dd7ad0a4 | 295 | { |
e6ccf245 | 296 | hash_link *e = (hash_link *)hash_lookup(ip_table, i->hash.key); |
62e76326 | 297 | |
bae9832d | 298 | #if DNS_CNAME |
cc192b50 | 299 | /* INET6 : should NOT be adding this entry until all CNAME have been received. */ |
300 | assert(i->cname_wait == 0); | |
bae9832d | 301 | #endif |
cc192b50 | 302 | |
ecc3091b | 303 | if (NULL != e) { |
62e76326 | 304 | /* avoid colission */ |
305 | ipcache_entry *q = (ipcache_entry *) e; | |
bae9832d | 306 | #if DNS_CNAME |
26ac0430 | 307 | if (q == i) { |
cc192b50 | 308 | /* can occur with Multiple-depth CNAME Recursion if parent returned early with additional */ |
309 | /* just need to drop from the hash without releasing actual memory */ | |
310 | ipcacheRelease(q, false); | |
26ac0430 | 311 | } else |
bae9832d | 312 | #endif |
cc192b50 | 313 | ipcacheRelease(q); |
ecc3091b | 314 | } |
62e76326 | 315 | |
186477c1 | 316 | hash_join(ip_table, &i->hash); |
ecc3091b | 317 | dlinkAdd(i, &i->lru, &lru_list); |
dd7ad0a4 | 318 | i->lastref = squid_curtime; |
090089c4 | 319 | } |
320 | ||
63be0a78 | 321 | /** |
322 | \ingroup IPCacheInternal | |
323 | * | |
324 | * walks down the pending list, calling handlers | |
325 | */ | |
b8d8561b | 326 | static void |
ecc3091b | 327 | ipcacheCallback(ipcache_entry * i) |
090089c4 | 328 | { |
fa80a8ef | 329 | IPH *callback = i->handler; |
cc192b50 | 330 | void *cbdata = NULL; |
30a4f2a8 | 331 | i->lastref = squid_curtime; |
62e76326 | 332 | |
fa80a8ef | 333 | if (!i->handler) |
62e76326 | 334 | return; |
335 | ||
fa80a8ef | 336 | ipcacheLockEntry(i); |
62e76326 | 337 | |
fa80a8ef | 338 | callback = i->handler; |
62e76326 | 339 | |
ecc3091b | 340 | i->handler = NULL; |
62e76326 | 341 | |
fa80a8ef | 342 | if (cbdataReferenceValidDone(i->handlerData, &cbdata)) { |
62e76326 | 343 | dns_error_message = i->error_message; |
d6d3dbd4 | 344 | callback(i->addrs.count ? &i->addrs : NULL, cbdata); |
090089c4 | 345 | } |
62e76326 | 346 | |
620da955 | 347 | ipcacheUnlockEntry(i); |
090089c4 | 348 | } |
349 | ||
63be0a78 | 350 | /// \ingroup IPCacheAPI |
b18baa48 | 351 | #if USE_DNSSERVERS |
7ba8d0b8 | 352 | static int |
353 | ipcacheParse(ipcache_entry *i, const char *inbuf) | |
090089c4 | 354 | { |
bd34f258 | 355 | LOCAL_ARRAY(char, buf, DNS_INBUF_SZ); |
d5a266cb | 356 | char *token; |
bd34f258 | 357 | int ipcount = 0; |
358 | int ttl; | |
7ba8d0b8 | 359 | char *A[32]; |
360 | const char *name = (const char *)i->hash.key; | |
361 | i->expires = squid_curtime + Config.negativeDnsTtl; | |
362 | i->flags.negcached = 1; | |
363 | safe_free(i->addrs.in_addrs); | |
364 | safe_free(i->addrs.bad_mask); | |
365 | safe_free(i->error_message); | |
366 | i->addrs.count = 0; | |
62e76326 | 367 | |
c68e9c6b | 368 | if (inbuf == NULL) { |
bf8fe701 | 369 | debugs(14, 1, "ipcacheParse: Got <NULL> reply"); |
7ba8d0b8 | 370 | i->error_message = xstrdup("Internal Error"); |
371 | return -1; | |
c68e9c6b | 372 | } |
62e76326 | 373 | |
c68e9c6b | 374 | xstrncpy(buf, inbuf, DNS_INBUF_SZ); |
bf8fe701 | 375 | debugs(14, 5, "ipcacheParse: parsing: {" << buf << "}"); |
bd34f258 | 376 | token = strtok(buf, w_space); |
62e76326 | 377 | |
bd34f258 | 378 | if (NULL == token) { |
bf8fe701 | 379 | debugs(14, 1, "ipcacheParse: expecting result, got '" << inbuf << "'"); |
380 | ||
7ba8d0b8 | 381 | i->error_message = xstrdup("Internal Error"); |
382 | return -1; | |
bd34f258 | 383 | } |
62e76326 | 384 | |
bd34f258 | 385 | if (0 == strcmp(token, "$fail")) { |
62e76326 | 386 | token = strtok(NULL, "\n"); |
387 | assert(NULL != token); | |
7ba8d0b8 | 388 | i->error_message = xstrdup(token); |
389 | return 0; | |
bd34f258 | 390 | } |
62e76326 | 391 | |
bd34f258 | 392 | if (0 != strcmp(token, "$addr")) { |
bf8fe701 | 393 | debugs(14, 1, "ipcacheParse: expecting '$addr', got '" << inbuf << "' in response to '" << name << "'"); |
394 | ||
7ba8d0b8 | 395 | i->error_message = xstrdup("Internal Error"); |
396 | return -1; | |
bd34f258 | 397 | } |
62e76326 | 398 | |
bd34f258 | 399 | token = strtok(NULL, w_space); |
62e76326 | 400 | |
bd34f258 | 401 | if (NULL == token) { |
bf8fe701 | 402 | debugs(14, 1, "ipcacheParse: expecting TTL, got '" << inbuf << "' in response to '" << name << "'"); |
403 | ||
7ba8d0b8 | 404 | i->error_message = xstrdup("Internal Error"); |
405 | return -1; | |
bd34f258 | 406 | } |
62e76326 | 407 | |
bd34f258 | 408 | ttl = atoi(token); |
62e76326 | 409 | |
bd34f258 | 410 | while (NULL != (token = strtok(NULL, w_space))) { |
7ba8d0b8 | 411 | A[ipcount] = token; |
62e76326 | 412 | |
413 | if (++ipcount == 32) | |
414 | break; | |
090089c4 | 415 | } |
62e76326 | 416 | |
7ba8d0b8 | 417 | if (ipcount > 0) { |
418 | int j, k; | |
62e76326 | 419 | |
23f6a720 | 420 | i->addrs.in_addrs = (IpAddress *)xcalloc(ipcount, sizeof(IpAddress)); |
26ac0430 | 421 | for (int l = 0; l < ipcount; l++) |
cc192b50 | 422 | i->addrs.in_addrs[l].SetEmpty(); // perform same init actions as constructor would. |
c48b9cc7 | 423 | i->addrs.bad_mask = (unsigned char *)xcalloc(ipcount, sizeof(unsigned char)); |
cc192b50 | 424 | memset(i->addrs.bad_mask, 0, sizeof(unsigned char) * ipcount); |
7ba8d0b8 | 425 | |
426 | for (j = 0, k = 0; k < ipcount; k++) { | |
cc192b50 | 427 | if ( i->addrs.in_addrs[j] = A[k] ) |
7ba8d0b8 | 428 | j++; |
429 | else | |
bf8fe701 | 430 | debugs(14, 1, "ipcacheParse: Invalid IP address '" << A[k] << "' in response to '" << name << "'"); |
7ba8d0b8 | 431 | } |
432 | ||
433 | i->addrs.count = (unsigned char) j; | |
bd34f258 | 434 | } |
62e76326 | 435 | |
7ba8d0b8 | 436 | if (i->addrs.count <= 0) { |
bf8fe701 | 437 | debugs(14, 1, "ipcacheParse: No addresses in response to '" << name << "'"); |
7ba8d0b8 | 438 | return -1; |
bd34f258 | 439 | } |
62e76326 | 440 | |
7ba8d0b8 | 441 | if (ttl == 0 || ttl > Config.positiveDnsTtl) |
442 | ttl = Config.positiveDnsTtl; | |
443 | ||
444 | if (ttl < Config.negativeDnsTtl) | |
445 | ttl = Config.negativeDnsTtl; | |
446 | ||
447 | i->expires = squid_curtime + ttl; | |
448 | ||
449 | i->flags.negcached = 0; | |
450 | ||
451 | return i->addrs.count; | |
090089c4 | 452 | } |
62e76326 | 453 | |
7b724b86 | 454 | #else |
7ba8d0b8 | 455 | static int |
456 | ipcacheParse(ipcache_entry *i, rfc1035_rr * answers, int nr, const char *error_message) | |
7b724b86 | 457 | { |
7cfc1c9a | 458 | int k; |
cc192b50 | 459 | int j = 0; |
7cfc1c9a | 460 | int na = 0; |
7ba8d0b8 | 461 | int ttl = 0; |
462 | const char *name = (const char *)i->hash.key; | |
bae9832d | 463 | int cname_found = 0; |
464 | ||
7ba8d0b8 | 465 | i->expires = squid_curtime + Config.negativeDnsTtl; |
466 | i->flags.negcached = 1; | |
467 | safe_free(i->addrs.in_addrs); | |
cc192b50 | 468 | assert(i->addrs.in_addrs == NULL); |
7ba8d0b8 | 469 | safe_free(i->addrs.bad_mask); |
cc192b50 | 470 | assert(i->addrs.bad_mask == NULL); |
7ba8d0b8 | 471 | safe_free(i->error_message); |
cc192b50 | 472 | assert(i->error_message == NULL); |
7ba8d0b8 | 473 | i->addrs.count = 0; |
62e76326 | 474 | |
7cfc1c9a | 475 | if (nr < 0) { |
bf8fe701 | 476 | debugs(14, 3, "ipcacheParse: Lookup failed '" << error_message << "' for '" << (const char *)i->hash.key << "'"); |
7ba8d0b8 | 477 | i->error_message = xstrdup(error_message); |
478 | return -1; | |
7cfc1c9a | 479 | } |
62e76326 | 480 | |
7cfc1c9a | 481 | if (nr == 0) { |
bf8fe701 | 482 | debugs(14, 3, "ipcacheParse: No DNS records in response to '" << name << "'"); |
7ba8d0b8 | 483 | i->error_message = xstrdup("No DNS records"); |
cc192b50 | 484 | return -1; |
7cfc1c9a | 485 | } |
62e76326 | 486 | |
7cfc1c9a | 487 | assert(answers); |
62e76326 | 488 | |
a12a049a | 489 | for (k = 0; k < nr; k++) { |
62e76326 | 490 | |
cc192b50 | 491 | #if USE_IPV6 |
492 | if (answers[k].type == RFC1035_TYPE_AAAA) { | |
26ac0430 AJ |
493 | if (answers[k].rdlength != sizeof(struct in6_addr)) { |
494 | debugs(14, 1, "ipcacheParse: Invalid IPv6 address in response to '" << name << "'"); | |
495 | continue; | |
496 | } | |
497 | na++; | |
bae9832d | 498 | IpcacheStats.rr_aaaa++; |
26ac0430 AJ |
499 | continue; |
500 | } | |
cc192b50 | 501 | #endif |
62e76326 | 502 | |
cc192b50 | 503 | if (answers[k].type == RFC1035_TYPE_A) { |
26ac0430 AJ |
504 | if (answers[k].rdlength != sizeof(struct in_addr)) { |
505 | debugs(14, 1, "ipcacheParse: Invalid IPv4 address in response to '" << name << "'"); | |
506 | continue; | |
507 | } | |
508 | na++; | |
bae9832d | 509 | IpcacheStats.rr_a++; |
26ac0430 AJ |
510 | continue; |
511 | } | |
cc192b50 | 512 | |
26ac0430 | 513 | /* With A and AAAA, the CNAME does not necessarily come with additional records to use. */ |
cc192b50 | 514 | if (answers[k].type == RFC1035_TYPE_CNAME) { |
bae9832d | 515 | cname_found=1; |
516 | IpcacheStats.rr_cname++; | |
517 | ||
518 | #if DNS_CNAME | |
cc192b50 | 519 | debugs(14, 5, "ipcacheParse: " << name << " CNAME " << answers[k].rdata << " (checking destination: " << i << ")."); |
520 | const ipcache_addrs *res = ipcache_gethostbyname(answers[k].rdata, 0); | |
26ac0430 | 521 | if (res) { |
cc192b50 | 522 | na += res->count; |
523 | debugs(14, 5, "ipcacheParse: CNAME " << answers[k].rdata << " already has " << res->count << " IPs cached."); | |
26ac0430 | 524 | } else { |
cc192b50 | 525 | /* keep going on this, but flag the fact that we need to wait for a CNAME lookup to finish */ |
526 | debugs(14, 5, "ipcacheParse: CNAME " << answers[k].rdata << " has no IPs! Recursing."); | |
527 | ipcache_nbgethostbyname(answers[k].rdata, ipcacheHandleCnameRecurse, new generic_cbdata(i) ); | |
528 | i->cname_wait++; | |
529 | } | |
bae9832d | 530 | #endif /* DNS_CNAME */ |
531 | ||
470cd749 | 532 | continue; |
533 | } | |
bae9832d | 534 | |
535 | // otherwise its an unknown RR. debug at level 9 since we usually want to ignore these and they are common. | |
536 | debugs(14, 9, HERE << "Unknown RR type received: type=" << answers[k].type << " starting at " << &(answers[k]) ); | |
cc192b50 | 537 | } |
470cd749 | 538 | |
bae9832d | 539 | #if DNS_CNAME |
26ac0430 | 540 | if (na == 0 && i->cname_wait >0 ) { |
cc192b50 | 541 | /* don't set any error message (yet). Allow recursion to do its work first. */ |
bae9832d | 542 | IpcacheStats.cname_only++; |
cc192b50 | 543 | return 0; |
7cfc1c9a | 544 | } |
bae9832d | 545 | #endif /* DNS_CNAME */ |
62e76326 | 546 | |
7cfc1c9a | 547 | if (na == 0) { |
bf8fe701 | 548 | debugs(14, 1, "ipcacheParse: No Address records in response to '" << name << "'"); |
7ba8d0b8 | 549 | i->error_message = xstrdup("No Address records"); |
26ac0430 | 550 | if (cname_found) |
bae9832d | 551 | IpcacheStats.cname_only++; |
7ba8d0b8 | 552 | return 0; |
7cfc1c9a | 553 | } |
62e76326 | 554 | |
23f6a720 | 555 | i->addrs.in_addrs = (IpAddress *)xcalloc(na, sizeof(IpAddress)); |
26ac0430 | 556 | for (int l = 0; l < na; l++) |
cc192b50 | 557 | i->addrs.in_addrs[l].SetEmpty(); // perform same init actions as constructor would. |
7ba8d0b8 | 558 | i->addrs.bad_mask = (unsigned char *)xcalloc(na, sizeof(unsigned char)); |
62e76326 | 559 | |
7cfc1c9a | 560 | for (j = 0, k = 0; k < nr; k++) { |
62e76326 | 561 | |
2d320a3a | 562 | if (answers[k].type == RFC1035_TYPE_A) { |
cc192b50 | 563 | if (answers[k].rdlength != sizeof(struct in_addr)) |
2d320a3a | 564 | continue; |
565 | ||
cc192b50 | 566 | struct in_addr temp; |
567 | xmemcpy(&temp, answers[k].rdata, sizeof(struct in_addr)); | |
568 | i->addrs.in_addrs[j] = temp; | |
2d320a3a | 569 | |
cc192b50 | 570 | debugs(14, 3, "ipcacheParse: " << name << " #" << j << " " << i->addrs.in_addrs[j]); |
571 | j++; | |
bf8fe701 | 572 | |
cc192b50 | 573 | #if USE_IPV6 |
574 | } else if (answers[k].type == RFC1035_TYPE_AAAA) { | |
575 | if (answers[k].rdlength != sizeof(struct in6_addr)) | |
576 | continue; | |
577 | ||
578 | struct in6_addr temp; | |
579 | xmemcpy(&temp, answers[k].rdata, sizeof(struct in6_addr)); | |
580 | i->addrs.in_addrs[j] = temp; | |
581 | ||
582 | debugs(14, 3, "ipcacheParse: " << name << " #" << j << " " << i->addrs.in_addrs[j] ); | |
583 | j++; | |
584 | #endif | |
bae9832d | 585 | } |
586 | #if DNS_CNAME | |
587 | else if (answers[k].type == RFC1035_TYPE_CNAME) { | |
cc192b50 | 588 | debugs(14, 3, "ipcacheParse: " << name << " #x CNAME " << answers[k].rdata); |
589 | const ipcache_addrs *res = ipcache_gethostbyname(answers[k].rdata, 0); | |
26ac0430 | 590 | if (res) { |
cc192b50 | 591 | /* NP: the results of *that* query need to be integrated in place of the CNAME */ |
592 | /* Ideally we should also integrate the min TTL of the above IPA's into ttl. */ | |
26ac0430 | 593 | for (int l = 0; l < res->count; l++, j++) { |
cc192b50 | 594 | i->addrs.in_addrs[j] = res->in_addrs[l]; |
595 | debugs(14, 3, "ipcacheParse: " << name << " #" << j << " " << i->addrs.in_addrs[j] ); | |
596 | } | |
26ac0430 | 597 | } else { |
cc192b50 | 598 | debugs(14, 9, "ipcacheParse: " << answers[k].rdata << " (CNAME) waiting on A/AAAA records."); |
599 | } | |
600 | } | |
bae9832d | 601 | #endif /* DNS_CNAME */ |
470cd749 | 602 | |
7ba8d0b8 | 603 | if (ttl == 0 || (int) answers[k].ttl < ttl) |
604 | ttl = answers[k].ttl; | |
7b724b86 | 605 | } |
62e76326 | 606 | |
7cfc1c9a | 607 | assert(j == na); |
7ba8d0b8 | 608 | |
be6e7af9 | 609 | if (na < 256) |
610 | i->addrs.count = (unsigned char) na; | |
611 | else | |
612 | i->addrs.count = 255; | |
7ba8d0b8 | 613 | |
3e8c4107 | 614 | if (ttl > Config.positiveDnsTtl) |
7ba8d0b8 | 615 | ttl = Config.positiveDnsTtl; |
616 | ||
617 | if (ttl < Config.negativeDnsTtl) | |
618 | ttl = Config.negativeDnsTtl; | |
619 | ||
620 | i->expires = squid_curtime + ttl; | |
621 | ||
622 | i->flags.negcached = 0; | |
623 | ||
bae9832d | 624 | #if DNS_CNAME |
cc192b50 | 625 | /* SPECIAL CASE: may get here IFF CNAME received with Additional records */ |
626 | /* reurn 0/'wait for further details' value. */ | |
627 | /* NP: 'No DNS Results' is a return -1 +msg */ | |
26ac0430 | 628 | if (i->cname_wait) |
cc192b50 | 629 | return 0; |
630 | else | |
bae9832d | 631 | #endif /* DNS_CNAME */ |
cc192b50 | 632 | return i->addrs.count; |
7b724b86 | 633 | } |
62e76326 | 634 | |
7b724b86 | 635 | #endif |
090089c4 | 636 | |
63be0a78 | 637 | /// \ingroup IPCacheInternal |
a7e59001 | 638 | static void |
7b724b86 | 639 | #if USE_DNSSERVERS |
74addf6c | 640 | ipcacheHandleReply(void *data, char *reply) |
7b724b86 | 641 | #else |
7ba8d0b8 | 642 | ipcacheHandleReply(void *data, rfc1035_rr * answers, int na, const char *error_message) |
7b724b86 | 643 | #endif |
090089c4 | 644 | { |
cc192b50 | 645 | int done; |
aa839030 | 646 | ipcache_entry *i; |
647 | static_cast<generic_cbdata *>(data)->unwrap(&i); | |
1810dde6 | 648 | IpcacheStats.replies++; |
ecc3091b | 649 | statHistCount(&statCounter.dns.svc_time, |
62e76326 | 650 | tvSubMsec(i->request_time, current_time)); |
7b724b86 | 651 | #if USE_DNSSERVERS |
62e76326 | 652 | |
cc192b50 | 653 | done = ipcacheParse(i, reply); |
7b724b86 | 654 | #else |
62e76326 | 655 | |
cc192b50 | 656 | done = ipcacheParse(i, answers, na, error_message); |
657 | ||
658 | /* If we have not produced either IPs or Error immediately, wait for recursion to finish. */ | |
26ac0430 | 659 | if (done != 0 || error_message != NULL) |
7b724b86 | 660 | #endif |
62e76326 | 661 | |
cc192b50 | 662 | { |
663 | ipcacheAddEntry(i); | |
664 | ipcacheCallback(i); | |
665 | } | |
30a4f2a8 | 666 | } |
667 | ||
63be0a78 | 668 | /** |
669 | \ingroup IPCacheAPI | |
670 | * | |
671 | \param name Host to resolve. | |
672 | \param handler Pointer to the function to be called when the reply | |
673 | * from the IP cache (or the DNS if the IP cache misses) | |
674 | \param handlerData Information that is passed to the handler and does not affect the IP cache. | |
79300bcb AR |
675 | * |
676 | * XXX: on hits and some errors, the handler is called immediately instead | |
677 | * of scheduling an async call. This reentrant behavior means that the | |
678 | * user job must be extra careful after calling ipcache_nbgethostbyname, | |
26ac0430 | 679 | * especially if the handler destroys the job. Moreover, the job has |
79300bcb | 680 | * no way of knowing whether the reentrant call happened. commConnectStart |
26ac0430 | 681 | * protects the job by scheduling an async call, but some user code calls |
79300bcb | 682 | * ipcache_nbgethostbyname directly. |
63be0a78 | 683 | */ |
b8d8561b | 684 | void |
8407afee | 685 | ipcache_nbgethostbyname(const char *name, IPH * handler, void *handlerData) |
090089c4 | 686 | { |
30a4f2a8 | 687 | ipcache_entry *i = NULL; |
429fdbec | 688 | const ipcache_addrs *addrs = NULL; |
74addf6c | 689 | generic_cbdata *c; |
605bd345 | 690 | assert(handler != NULL); |
bf8fe701 | 691 | debugs(14, 4, "ipcache_nbgethostbyname: Name '" << name << "'."); |
30a4f2a8 | 692 | IpcacheStats.requests++; |
62e76326 | 693 | |
090089c4 | 694 | if (name == NULL || name[0] == '\0') { |
bf8fe701 | 695 | debugs(14, 4, "ipcache_nbgethostbyname: Invalid name!"); |
22b245f8 | 696 | IpcacheStats.invalid++; |
2ffff82e | 697 | dns_error_message = "Invalid hostname"; |
62e76326 | 698 | handler(NULL, handlerData); |
699 | return; | |
af00901c | 700 | } |
62e76326 | 701 | |
e5f6c5c2 | 702 | if ((addrs = ipcacheCheckNumeric(name))) { |
cc192b50 | 703 | debugs(14, 4, "ipcache_nbgethostbyname: BYPASS for '" << name << "' (already numeric)"); |
2ffff82e | 704 | dns_error_message = NULL; |
22b245f8 | 705 | IpcacheStats.numeric_hits++; |
62e76326 | 706 | handler(addrs, handlerData); |
707 | return; | |
090089c4 | 708 | } |
62e76326 | 709 | |
ecc3091b | 710 | i = ipcache_get(name); |
62e76326 | 711 | |
ecc3091b | 712 | if (NULL == i) { |
62e76326 | 713 | /* miss */ |
714 | (void) 0; | |
ecc3091b | 715 | } else if (ipcacheExpiredEntry(i)) { |
62e76326 | 716 | /* hit, but expired -- bummer */ |
717 | ipcacheRelease(i); | |
718 | i = NULL; | |
ecc3091b | 719 | } else { |
62e76326 | 720 | /* hit */ |
bf8fe701 | 721 | debugs(14, 4, "ipcache_nbgethostbyname: HIT for '" << name << "'"); |
62e76326 | 722 | |
723 | if (i->flags.negcached) | |
724 | IpcacheStats.negative_hits++; | |
725 | else | |
726 | IpcacheStats.hits++; | |
727 | ||
728 | i->handler = handler; | |
729 | ||
730 | i->handlerData = cbdataReference(handlerData); | |
731 | ||
732 | ipcacheCallback(i); | |
733 | ||
734 | return; | |
090089c4 | 735 | } |
62e76326 | 736 | |
bf8fe701 | 737 | debugs(14, 5, "ipcache_nbgethostbyname: MISS for '" << name << "'"); |
ecc3091b | 738 | IpcacheStats.misses++; |
739 | i = ipcacheCreateEntry(name); | |
740 | i->handler = handler; | |
fa80a8ef | 741 | i->handlerData = cbdataReference(handlerData); |
ecc3091b | 742 | i->request_time = current_time; |
aa839030 | 743 | c = new generic_cbdata(i); |
7b724b86 | 744 | #if USE_DNSSERVERS |
62e76326 | 745 | |
186477c1 | 746 | dnsSubmit(hashKeyStr(&i->hash), ipcacheHandleReply, c); |
7b724b86 | 747 | #else |
62e76326 | 748 | |
186477c1 | 749 | idnsALookup(hashKeyStr(&i->hash), ipcacheHandleReply, c); |
7b724b86 | 750 | #endif |
090089c4 | 751 | } |
752 | ||
5f5e883f FC |
753 | /// \ingroup IPCacheInternal |
754 | static void | |
755 | ipcacheRegisterWithCacheManager(void) | |
756 | { | |
757 | CacheManager::GetInstance()-> | |
26ac0430 AJ |
758 | registerAction("ipcache", |
759 | "IP Cache Stats and Contents", | |
760 | stat_ipcache_get, 0, 1); | |
5f5e883f FC |
761 | } |
762 | ||
763 | ||
63be0a78 | 764 | /** |
765 | \ingroup IPCacheAPI | |
766 | * | |
767 | * Initialize the ipcache. | |
768 | * Is called from mainInitialize() after disk initialization | |
769 | * and prior to the reverse FQDNCache initialization | |
770 | */ | |
b8d8561b | 771 | void |
0673c0ba | 772 | ipcache_init(void) |
0ffd22bc | 773 | { |
aa9e2cab | 774 | int n; |
8eb28163 | 775 | debugs(14, DBG_IMPORTANT, "Initializing IP Cache..."); |
30a4f2a8 | 776 | memset(&IpcacheStats, '\0', sizeof(IpcacheStats)); |
3eb55834 | 777 | memset(&lru_list, '\0', sizeof(lru_list)); |
e5f6c5c2 | 778 | memset(&static_addrs, '\0', sizeof(ipcache_addrs)); |
62e76326 | 779 | |
23f6a720 | 780 | static_addrs.in_addrs = (IpAddress *)xcalloc(1, sizeof(IpAddress)); |
ad61a2b4 | 781 | static_addrs.in_addrs->SetEmpty(); // properly setup the IpAddress! |
e6ccf245 | 782 | static_addrs.bad_mask = (unsigned char *)xcalloc(1, sizeof(unsigned char)); |
b15e6857 | 783 | ipcache_high = (long) (((float) Config.ipcache.size * |
62e76326 | 784 | (float) Config.ipcache.high) / (float) 100); |
b15e6857 | 785 | ipcache_low = (long) (((float) Config.ipcache.size * |
62e76326 | 786 | (float) Config.ipcache.low) / (float) 100); |
aa9e2cab | 787 | n = hashPrime(ipcache_high / 4); |
30abd221 | 788 | ip_table = hash_create((HASHCMP *) strcmp, n, hash4); |
ecc3091b | 789 | memDataInit(MEM_IPCACHE_ENTRY, "ipcache_entry", sizeof(ipcache_entry), 0); |
d120ed12 FC |
790 | |
791 | ipcacheRegisterWithCacheManager(); | |
090089c4 | 792 | } |
793 | ||
63be0a78 | 794 | /** |
795 | \ingroup IPCacheAPI | |
796 | * | |
797 | * Is different from ipcache_nbgethostbyname in that it only checks | |
798 | * if an entry exists in the cache and does not by default contact the DNS, | |
799 | * unless this is requested, by setting the flags. | |
800 | * | |
801 | \param name Host name to resolve. | |
802 | \param flags Default is NULL, set to IP_LOOKUP_IF_MISS | |
803 | * to explicitly perform DNS lookups. | |
804 | * | |
805 | \retval NULL An error occured during lookup | |
806 | \retval NULL No results available in cache and no lookup specified | |
807 | \retval * Pointer to the ipcahce_addrs structure containing the lookup results | |
808 | */ | |
0ee4272b | 809 | const ipcache_addrs * |
810 | ipcache_gethostbyname(const char *name, int flags) | |
090089c4 | 811 | { |
30a4f2a8 | 812 | ipcache_entry *i = NULL; |
e5f6c5c2 | 813 | ipcache_addrs *addrs; |
ecc3091b | 814 | assert(name); |
bf8fe701 | 815 | debugs(14, 3, "ipcache_gethostbyname: '" << name << "', flags=" << std::hex << flags); |
30a4f2a8 | 816 | IpcacheStats.requests++; |
ecc3091b | 817 | i = ipcache_get(name); |
62e76326 | 818 | |
ecc3091b | 819 | if (NULL == i) { |
62e76326 | 820 | (void) 0; |
ecc3091b | 821 | } else if (ipcacheExpiredEntry(i)) { |
62e76326 | 822 | ipcacheRelease(i); |
823 | i = NULL; | |
ecc3091b | 824 | } else if (i->flags.negcached) { |
62e76326 | 825 | IpcacheStats.negative_hits++; |
826 | dns_error_message = i->error_message; | |
827 | return NULL; | |
ecc3091b | 828 | } else { |
62e76326 | 829 | IpcacheStats.hits++; |
830 | i->lastref = squid_curtime; | |
2ffff82e | 831 | dns_error_message = i->error_message; |
62e76326 | 832 | return &i->addrs; |
30a4f2a8 | 833 | } |
62e76326 | 834 | |
2ffff82e | 835 | dns_error_message = NULL; |
836 | ||
22b245f8 | 837 | if ((addrs = ipcacheCheckNumeric(name))) { |
838 | IpcacheStats.numeric_hits++; | |
62e76326 | 839 | return addrs; |
22b245f8 | 840 | } |
62e76326 | 841 | |
e61d864a | 842 | IpcacheStats.misses++; |
62e76326 | 843 | |
30a4f2a8 | 844 | if (flags & IP_LOOKUP_IF_MISS) |
cc192b50 | 845 | ipcache_nbgethostbyname(name, ipcacheHandleCnameRecurse, NULL); |
62e76326 | 846 | |
30a4f2a8 | 847 | return NULL; |
090089c4 | 848 | } |
849 | ||
63be0a78 | 850 | /// \ingroup IPCacheInternal |
b8d8561b | 851 | static void |
852 | ipcacheStatPrint(ipcache_entry * i, StoreEntry * sentry) | |
af00901c | 853 | { |
854 | int k; | |
cc192b50 | 855 | char buf[MAX_IPSTRLEN]; |
856 | ||
26ac0430 | 857 | if (!sentry) { |
cc192b50 | 858 | debugs(14, 0, HERE << "CRITICAL: sentry is NULL!"); |
71aab4cc | 859 | return; |
cc192b50 | 860 | } |
861 | ||
26ac0430 | 862 | if (!i) { |
cc192b50 | 863 | debugs(14, 0, HERE << "CRITICAL: ipcache_entry is NULL!"); |
864 | storeAppendPrintf(sentry, "CRITICAL ERROR\n"); | |
865 | return; | |
866 | } | |
867 | ||
71aab4cc AJ |
868 | int count = i->addrs.count; |
869 | ||
181b1adc | 870 | storeAppendPrintf(sentry, " %-32.32s %c%c %6d %6d %2d(%2d)", |
62e76326 | 871 | hashKeyStr(&i->hash), |
872 | i->flags.fromhosts ? 'H' : ' ', | |
873 | i->flags.negcached ? 'N' : ' ', | |
874 | (int) (squid_curtime - i->lastref), | |
875 | (int) ((i->flags.fromhosts ? -1 : i->expires - squid_curtime)), | |
876 | (int) i->addrs.count, | |
877 | (int) i->addrs.badcount); | |
878 | ||
cc192b50 | 879 | /** \par |
880 | * Negative-cached entries have no IPs listed. */ | |
26ac0430 | 881 | if (i->flags.negcached) { |
cc192b50 | 882 | storeAppendPrintf(sentry, "\n"); |
883 | return; | |
52926044 | 884 | } |
62e76326 | 885 | |
cc192b50 | 886 | /** \par |
887 | * Cached entries have IPs listed with a BNF of: <IP> '-' ('OK'|'BAD') */ | |
888 | for (k = 0; k < count; k++) { | |
889 | /* Display tidy-up: IPv6 are so big make the list vertical */ | |
26ac0430 | 890 | if (k == 0) |
cc192b50 | 891 | storeAppendPrintf(sentry, " %45.45s-%3s\n", |
892 | i->addrs.in_addrs[k].NtoA(buf,MAX_IPSTRLEN), | |
893 | i->addrs.bad_mask[k] ? "BAD" : "OK "); | |
894 | else | |
895 | storeAppendPrintf(sentry, "%s %45.45s-%3s\n", | |
896 | " ", /* blank-space indenting IP list */ | |
897 | i->addrs.in_addrs[k].NtoA(buf,MAX_IPSTRLEN), | |
898 | i->addrs.bad_mask[k] ? "BAD" : "OK "); | |
899 | } | |
af00901c | 900 | } |
090089c4 | 901 | |
63be0a78 | 902 | /** |
903 | \ingroup IPCacheInternal | |
904 | * | |
905 | * process objects list | |
906 | */ | |
b8d8561b | 907 | void |
908 | stat_ipcache_get(StoreEntry * sentry) | |
090089c4 | 909 | { |
7b04dad5 | 910 | dlink_node *m; |
911 | assert(ip_table != NULL); | |
15576b6a | 912 | storeAppendPrintf(sentry, "IP Cache Statistics:\n"); |
22b245f8 | 913 | storeAppendPrintf(sentry, "IPcache Entries: %d\n", |
62e76326 | 914 | memInUse(MEM_IPCACHE_ENTRY)); |
15576b6a | 915 | storeAppendPrintf(sentry, "IPcache Requests: %d\n", |
62e76326 | 916 | IpcacheStats.requests); |
22b245f8 | 917 | storeAppendPrintf(sentry, "IPcache Hits: %d\n", |
62e76326 | 918 | IpcacheStats.hits); |
22b245f8 | 919 | storeAppendPrintf(sentry, "IPcache Negative Hits: %d\n", |
62e76326 | 920 | IpcacheStats.negative_hits); |
22b245f8 | 921 | storeAppendPrintf(sentry, "IPcache Numeric Hits: %d\n", |
922 | IpcacheStats.numeric_hits); | |
923 | storeAppendPrintf(sentry, "IPcache Misses: %d\n", | |
62e76326 | 924 | IpcacheStats.misses); |
f2d71697 | 925 | storeAppendPrintf(sentry, "IPcache Retrieved A: %d\n", |
bae9832d | 926 | IpcacheStats.rr_a); |
f2d71697 | 927 | storeAppendPrintf(sentry, "IPcache Retrieved AAAA: %d\n", |
bae9832d | 928 | IpcacheStats.rr_aaaa); |
929 | storeAppendPrintf(sentry, "IPcache Retrieved CNAME: %d\n", | |
930 | IpcacheStats.rr_cname); | |
931 | storeAppendPrintf(sentry, "IPcache CNAME-Only Response: %d\n", | |
932 | IpcacheStats.cname_only); | |
22b245f8 | 933 | storeAppendPrintf(sentry, "IPcache Invalid Request: %d\n", |
934 | IpcacheStats.invalid); | |
15576b6a | 935 | storeAppendPrintf(sentry, "\n\n"); |
936 | storeAppendPrintf(sentry, "IP Cache Contents:\n\n"); | |
cc192b50 | 937 | storeAppendPrintf(sentry, " %-31.31s %3s %6s %6s %4s\n", |
62e76326 | 938 | "Hostname", |
939 | "Flg", | |
940 | "lstref", | |
941 | "TTL", | |
cc192b50 | 942 | "N(b)"); |
62e76326 | 943 | |
cc192b50 | 944 | for (m = lru_list.head; m; m = m->next) { |
945 | assert( m->next != m ); | |
62e76326 | 946 | ipcacheStatPrint((ipcache_entry *)m->data, sentry); |
cc192b50 | 947 | } |
948 | } | |
949 | ||
bae9832d | 950 | #if DNS_CNAME |
cc192b50 | 951 | /** |
ad61a2b4 | 952 | * Takes two IpAddress arrays and merges them into a single array |
cc192b50 | 953 | * which is allocated dynamically to fit the number of unique addresses |
954 | * | |
955 | \param aaddrs One list to merge | |
956 | \param alen Size of list aaddrs | |
957 | \param baddrs Other list to merge | |
958 | \param alen Size of list baddrs | |
959 | \param out Combined list of unique addresses (sorted with IPv6 first in IPv6-mode) | |
960 | \param outlen Size of list out | |
961 | */ | |
962 | void | |
ad61a2b4 AJ |
963 | ipcacheMergeIPLists(const IpAddress *aaddrs, const int alen, |
964 | const IpAddress *baddrs, const int blen, | |
965 | IpAddress **out, int &outlen ) | |
cc192b50 | 966 | { |
967 | int fc=0, t=0, c=0; | |
968 | ||
ad61a2b4 | 969 | IpAddress const *ip4ptrs[255]; |
cc192b50 | 970 | #if USE_IPV6 |
ad61a2b4 | 971 | IpAddress const *ip6ptrs[255]; |
cc192b50 | 972 | #endif |
973 | int num_ip4 = 0; | |
974 | int num_ip6 = 0; | |
975 | ||
ad61a2b4 | 976 | memset(ip4ptrs, 0, sizeof(IpAddress*)*255); |
cc192b50 | 977 | #if USE_IPV6 |
ad61a2b4 | 978 | memset(ip6ptrs, 0, sizeof(IpAddress*)*255); |
cc192b50 | 979 | #endif |
980 | ||
981 | // for each unique address in list A - grab ptr | |
26ac0430 AJ |
982 | for (t = 0; t < alen; t++) { |
983 | if (aaddrs[t].IsIPv4()) { | |
cc192b50 | 984 | // check against IPv4 pruned list |
26ac0430 AJ |
985 | for (c = 0; c <= num_ip4; c++) { |
986 | if (ip4ptrs[c] && aaddrs[t] == *(ip4ptrs[c]) ) break; // duplicate. | |
cc192b50 | 987 | } |
26ac0430 | 988 | if (c > num_ip4) { |
cc192b50 | 989 | ip4ptrs[num_ip4] = &aaddrs[t]; |
990 | num_ip4++; | |
991 | } | |
992 | } | |
993 | #if USE_IPV6 | |
26ac0430 AJ |
994 | else if (aaddrs[t].IsIPv6()) { |
995 | debugs(14,8, HERE << "A[" << t << "]=IPv6 " << aaddrs[t]); | |
cc192b50 | 996 | // check against IPv6 pruned list |
26ac0430 AJ |
997 | for (c = 0; c <= num_ip6; c++) { |
998 | if (ip6ptrs[c] && aaddrs[t] == *ip6ptrs[c]) break; // duplicate. | |
cc192b50 | 999 | } |
26ac0430 | 1000 | if (c > num_ip6) { |
cc192b50 | 1001 | ip6ptrs[num_ip6] = &aaddrs[t]; |
1002 | num_ip6++; | |
1003 | } | |
1004 | } | |
1005 | #endif | |
1006 | } | |
1007 | ||
1008 | // for each unique address in list B - grab ptr | |
26ac0430 AJ |
1009 | for (t = 0; t < blen; t++) { |
1010 | if (baddrs[t].IsIPv4()) { | |
cc192b50 | 1011 | // check against IPv4 pruned list |
26ac0430 AJ |
1012 | for (c = 0; c <= num_ip4; c++) { |
1013 | if (ip4ptrs[c] && baddrs[t] == *ip4ptrs[c]) break; // duplicate. | |
cc192b50 | 1014 | } |
26ac0430 | 1015 | if (c > num_ip4) { |
cc192b50 | 1016 | ip4ptrs[num_ip4] = &baddrs[t]; |
1017 | num_ip4++; | |
1018 | } | |
1019 | } | |
1020 | #if USE_IPV6 | |
26ac0430 | 1021 | else if (baddrs[t].IsIPv6()) { |
cc192b50 | 1022 | // check against IPv6 pruned list |
26ac0430 AJ |
1023 | for (c = 0; c <= num_ip6; c++) { |
1024 | if (ip6ptrs[c] && baddrs[t] == *ip6ptrs[c]) break; // duplicate. | |
cc192b50 | 1025 | } |
26ac0430 | 1026 | if (c > num_ip6) { |
cc192b50 | 1027 | ip6ptrs[num_ip6] = &baddrs[t]; |
1028 | num_ip6++; | |
1029 | } | |
1030 | } | |
1031 | #endif | |
1032 | } | |
1033 | ||
1034 | fc = num_ip6 + num_ip4; | |
1035 | ||
1036 | assert(fc > 0); | |
1037 | ||
1038 | debugs(14, 5, "ipcacheMergeIPLists: Merge " << alen << "+" << blen << " into " << fc << " unique IPs."); | |
1039 | ||
1040 | // copy the old IPs into the new list buffer. | |
23f6a720 | 1041 | (*out) = (IpAddress*)xcalloc(fc, sizeof(IpAddress)); |
cc192b50 | 1042 | outlen=0; |
1043 | ||
1044 | assert(out != NULL); | |
1045 | ||
1046 | #if USE_IPV6 | |
1047 | /* IPv6 are preferred (tried first) over IPv4 */ | |
1048 | ||
26ac0430 | 1049 | for (int l = 0; outlen < num_ip6; l++, outlen++) { |
cc192b50 | 1050 | (*out)[outlen] = *ip6ptrs[l]; |
1051 | debugs(14, 5, "ipcacheMergeIPLists: #" << outlen << " " << (*out)[outlen] ); | |
1052 | } | |
1053 | #endif /* USE_IPV6 */ | |
1054 | ||
26ac0430 | 1055 | for (int l = 0; outlen < num_ip4; l++, outlen++) { |
cc192b50 | 1056 | (*out)[outlen] = *ip4ptrs[l]; |
1057 | debugs(14, 5, "ipcacheMergeIPLists: #" << outlen << " " << (*out)[outlen] ); | |
1058 | } | |
1059 | ||
1060 | assert(outlen == fc); // otherwise something broke badly! | |
090089c4 | 1061 | } |
bae9832d | 1062 | #endif /* DNS_CNAME */ |
4d64d74a | 1063 | |
63be0a78 | 1064 | /// \ingroup IPCacheInternal |
1065 | /// Callback. | |
caebbe00 | 1066 | static void |
cc192b50 | 1067 | ipcacheHandleCnameRecurse(const ipcache_addrs *addrs, void *cbdata) |
30a4f2a8 | 1068 | { |
bae9832d | 1069 | #if DNS_CNAME |
cc192b50 | 1070 | ipcache_entry *i = NULL; |
1071 | char *pname = NULL; | |
ad61a2b4 | 1072 | IpAddress *tmpbuf = NULL; |
cc192b50 | 1073 | int fc = 0; |
1074 | int ttl = 0; | |
1075 | generic_cbdata* gcb = (generic_cbdata*)cbdata; | |
1076 | // count of addrs at parent and child (REQ as .count is a char type!) | |
1077 | int ccount = 0, pcount = 0; | |
1078 | ||
1079 | debugs(14, 5, "ipcacheHandleCnameRecurse: Handling basic A/AAAA response."); | |
1080 | ||
1081 | /* IFF no CNAME recursion being processed. do nothing. */ | |
26ac0430 | 1082 | if (cbdata == NULL) |
cc192b50 | 1083 | return; |
1084 | ||
1085 | gcb->unwrap(&i); | |
1086 | assert(i != NULL); | |
1087 | ||
1088 | // make sure we are actualy waiting for a CNAME callback to be run. | |
1089 | assert(i->cname_wait > 0); | |
1090 | // count this event. its being handled. | |
1091 | i->cname_wait--; | |
1092 | ||
1093 | pname = (char*)i->hash.key; | |
1094 | assert(pname != NULL); | |
1095 | ||
1096 | debugs(14, 5, "ipcacheHandleCnameRecurse: Handling CNAME recursion. CBDATA('" << gcb->data << "')='" << pname << "' -> " << std::hex << i); | |
1097 | ||
26ac0430 | 1098 | if (i == NULL) { |
cc192b50 | 1099 | return; // Parent has expired. Don't merge, just leave for future Ref: |
1100 | } | |
1101 | ||
1102 | /* IFF addrs is NULL (Usually an Error or Timeout occured on lookup.) */ | |
1103 | /* Ignore it and HOPE that we got some Additional records to use. */ | |
26ac0430 | 1104 | if (addrs == NULL) |
cc192b50 | 1105 | return; |
1106 | ||
1107 | ccount = (0+ addrs->count); | |
1108 | pcount = (0+ i->addrs.count); | |
1109 | ttl = i->expires; | |
1110 | ||
1111 | /* IFF no CNAME results. do none of the processing BUT finish anyway. */ | |
26ac0430 | 1112 | if (addrs) { |
cc192b50 | 1113 | |
1114 | debugs(14, 5, "ipcacheHandleCnameRecurse: Merge IP Lists for " << pname << " (" << pcount << "+" << ccount << ")"); | |
1115 | ||
26ac0430 | 1116 | /* add new IP records to entry */ |
cc192b50 | 1117 | tmpbuf = i->addrs.in_addrs; |
1118 | i->addrs.in_addrs = NULL; | |
1119 | ipcacheMergeIPLists(tmpbuf, pcount, addrs->in_addrs, ccount, &(i->addrs.in_addrs), fc); | |
1120 | debugs(14,8, HERE << "in=" << tmpbuf << ", out=" << i->addrs.in_addrs ); | |
6980052a | 1121 | assert( (pcount>0 ? tmpbuf!=NULL : tmpbuf==NULL) ); |
cc192b50 | 1122 | safe_free(tmpbuf); |
1123 | ||
26ac0430 | 1124 | if ( pcount > 0) { |
cc192b50 | 1125 | /* IFF the parent initial lookup was given Additional records with A */ |
1126 | // clear the 'bad IP mask' | |
1127 | safe_free(i->addrs.bad_mask); | |
1128 | } | |
1129 | // create a new bad IP mask to fit the new size needed. | |
26ac0430 | 1130 | if (fc > 0) { |
cc192b50 | 1131 | i->addrs.bad_mask = (unsigned char*)xcalloc(fc, sizeof(unsigned char)); |
1132 | memset(i->addrs.bad_mask, 0, sizeof(unsigned char)*fc); | |
1133 | } | |
1134 | ||
1135 | if (fc < 256) | |
1136 | i->addrs.count = (unsigned char) fc; | |
1137 | else | |
1138 | i->addrs.count = 255; | |
1139 | ||
1140 | if (ttl == 0 || ttl > Config.positiveDnsTtl) | |
1141 | ttl = Config.positiveDnsTtl; | |
1142 | ||
1143 | if (ttl < Config.negativeDnsTtl) | |
1144 | ttl = Config.negativeDnsTtl; | |
1145 | ||
1146 | i->expires = squid_curtime + ttl; | |
1147 | ||
1148 | i->flags.negcached = 0; | |
1149 | ||
1150 | i->addrs.cur = 0; | |
1151 | ||
1152 | i->addrs.badcount = 0; | |
1153 | } | |
1154 | ||
26ac0430 | 1155 | if (fc == 0) { |
cc192b50 | 1156 | i->error_message = xstrdup("No DNS Records"); |
1157 | } | |
1158 | ||
1159 | /* finish the lookup we were doing on parent when we got side-tracked for CNAME loop */ | |
26ac0430 | 1160 | if (i->cname_wait == 0) { |
cc192b50 | 1161 | ipcacheAddEntry(i); |
1162 | ipcacheCallback(i); | |
1163 | } | |
1164 | // else still more CNAME to be found. | |
bae9832d | 1165 | #endif /* DNS_CNAME */ |
30a4f2a8 | 1166 | } |
1167 | ||
63be0a78 | 1168 | /// \ingroup IPCacheAPI |
b8d8561b | 1169 | void |
0ee4272b | 1170 | ipcacheInvalidate(const char *name) |
f900607e | 1171 | { |
1172 | ipcache_entry *i; | |
62e76326 | 1173 | |
f900607e | 1174 | if ((i = ipcache_get(name)) == NULL) |
62e76326 | 1175 | return; |
1176 | ||
6c11e193 | 1177 | i->expires = squid_curtime; |
62e76326 | 1178 | |
ecc3091b | 1179 | /* |
63be0a78 | 1180 | * NOTE, don't call ipcacheRelease here because we might be here due |
ecc3091b | 1181 | * to a thread started from a callback. |
1182 | */ | |
f900607e | 1183 | } |
af00901c | 1184 | |
63be0a78 | 1185 | /// \ingroup IPCacheAPI |
a12a049a | 1186 | void |
1187 | ipcacheInvalidateNegative(const char *name) | |
1188 | { | |
1189 | ipcache_entry *i; | |
1190 | ||
1191 | if ((i = ipcache_get(name)) == NULL) | |
1192 | return; | |
1193 | ||
1194 | if (i->flags.negcached) | |
1195 | i->expires = squid_curtime; | |
1196 | ||
1197 | /* | |
63be0a78 | 1198 | * NOTE, don't call ipcacheRelease here because we might be here due |
a12a049a | 1199 | * to a thread started from a callback. |
1200 | */ | |
1201 | } | |
1202 | ||
63be0a78 | 1203 | /// \ingroup IPCacheAPI |
4d650936 | 1204 | ipcache_addrs * |
0ee4272b | 1205 | ipcacheCheckNumeric(const char *name) |
af00901c | 1206 | { |
62e76326 | 1207 | |
ad61a2b4 | 1208 | IpAddress ip; |
af00901c | 1209 | /* check if it's already a IP address in text form. */ |
62e76326 | 1210 | |
cc192b50 | 1211 | /* it may be IPv6-wrapped */ |
26ac0430 | 1212 | if (name[0] == '[') { |
cc192b50 | 1213 | char *tmp = xstrdup(&name[1]); |
1214 | tmp[strlen(tmp)-1] = '\0'; | |
1215 | if (!(ip = tmp)) { | |
1216 | delete tmp; | |
1217 | return NULL; | |
1218 | } | |
1219 | delete tmp; | |
26ac0430 | 1220 | } else if (!(ip = name)) |
62e76326 | 1221 | return NULL; |
1222 | ||
cc192b50 | 1223 | debugs(14, 4, "ipcacheCheckNumeric: HIT_BYPASS for '" << name << "' == " << ip ); |
1224 | ||
e5f6c5c2 | 1225 | static_addrs.count = 1; |
62e76326 | 1226 | |
e5f6c5c2 | 1227 | static_addrs.cur = 0; |
62e76326 | 1228 | |
cc192b50 | 1229 | static_addrs.in_addrs[0] = ip; |
62e76326 | 1230 | |
22c653cd | 1231 | static_addrs.bad_mask[0] = FALSE; |
62e76326 | 1232 | |
22c653cd | 1233 | static_addrs.badcount = 0; |
62e76326 | 1234 | |
e5f6c5c2 | 1235 | return &static_addrs; |
af00901c | 1236 | } |
8905d949 | 1237 | |
63be0a78 | 1238 | /// \ingroup IPCacheInternal |
b8d8561b | 1239 | static void |
1240 | ipcacheLockEntry(ipcache_entry * i) | |
620da955 | 1241 | { |
7b04dad5 | 1242 | if (i->locks++ == 0) { |
62e76326 | 1243 | dlinkDelete(&i->lru, &lru_list); |
1244 | dlinkAdd(i, &i->lru, &lru_list); | |
7b04dad5 | 1245 | } |
620da955 | 1246 | } |
1247 | ||
63be0a78 | 1248 | /// \ingroup IPCacheInternal |
b8d8561b | 1249 | static void |
1250 | ipcacheUnlockEntry(ipcache_entry * i) | |
620da955 | 1251 | { |
26ac0430 | 1252 | if (i->locks < 1) { |
cc192b50 | 1253 | debugs(14, 1, "WARNING: ipcacheEntry unlocked with no lock! locks=" << i->locks); |
1254 | return; | |
1255 | } | |
1256 | ||
620da955 | 1257 | i->locks--; |
62e76326 | 1258 | |
620da955 | 1259 | if (ipcacheExpiredEntry(i)) |
62e76326 | 1260 | ipcacheRelease(i); |
620da955 | 1261 | } |
e5f6c5c2 | 1262 | |
63be0a78 | 1263 | /// \ingroup IPCacheAPI |
52926044 | 1264 | void |
4b4cd312 | 1265 | ipcacheCycleAddr(const char *name, ipcache_addrs * ia) |
52926044 | 1266 | { |
1267 | ipcache_entry *i; | |
1268 | unsigned char k; | |
1269 | assert(name || ia); | |
62e76326 | 1270 | |
52926044 | 1271 | if (NULL == ia) { |
62e76326 | 1272 | if ((i = ipcache_get(name)) == NULL) |
1273 | return; | |
1274 | ||
1275 | if (i->flags.negcached) | |
1276 | return; | |
1277 | ||
1278 | ia = &i->addrs; | |
52926044 | 1279 | } |
62e76326 | 1280 | |
52926044 | 1281 | for (k = 0; k < ia->count; k++) { |
62e76326 | 1282 | if (++ia->cur == ia->count) |
1283 | ia->cur = 0; | |
1284 | ||
1285 | if (!ia->bad_mask[ia->cur]) | |
1286 | break; | |
52926044 | 1287 | } |
62e76326 | 1288 | |
52926044 | 1289 | if (k == ia->count) { |
62e76326 | 1290 | /* All bad, reset to All good */ |
bf8fe701 | 1291 | debugs(14, 3, "ipcacheCycleAddr: Changing ALL " << name << " addrs from BAD to OK"); |
62e76326 | 1292 | |
1293 | for (k = 0; k < ia->count; k++) | |
1294 | ia->bad_mask[k] = 0; | |
1295 | ||
1296 | ia->badcount = 0; | |
1297 | ||
1298 | ia->cur = 0; | |
52926044 | 1299 | } |
62e76326 | 1300 | |
cc192b50 | 1301 | debugs(14, 3, "ipcacheCycleAddr: " << name << " now at " << ia->in_addrs[ia->cur] << " (" << ia->cur << " of " << ia->count << ")"); |
52926044 | 1302 | } |
e5f6c5c2 | 1303 | |
63be0a78 | 1304 | /** |
1305 | \ingroup IPCacheAPI | |
1306 | * | |
1307 | \param name domain name to have an IP marked bad | |
1308 | \param addr specific addres to be marked bad | |
22c653cd | 1309 | */ |
e5f6c5c2 | 1310 | void |
ad61a2b4 | 1311 | ipcacheMarkBadAddr(const char *name, IpAddress &addr) |
e5f6c5c2 | 1312 | { |
1313 | ipcache_entry *i; | |
1314 | ipcache_addrs *ia; | |
1315 | int k; | |
62e76326 | 1316 | |
63be0a78 | 1317 | /** Does nothing if the domain name does not exist. */ |
e5f6c5c2 | 1318 | if ((i = ipcache_get(name)) == NULL) |
62e76326 | 1319 | return; |
1320 | ||
e5f6c5c2 | 1321 | ia = &i->addrs; |
62e76326 | 1322 | |
26ac0430 | 1323 | for (k = 0; k < (int) ia->count; k++) { |
cc192b50 | 1324 | if (addr == ia->in_addrs[k] ) |
62e76326 | 1325 | break; |
e5f6c5c2 | 1326 | } |
62e76326 | 1327 | |
63be0a78 | 1328 | /** Does nothing if the IP does not exist for the doamin. */ |
1329 | if (k == (int) ia->count) | |
62e76326 | 1330 | return; |
1331 | ||
63be0a78 | 1332 | /** Marks the given address as BAD */ |
26ac0430 | 1333 | if (!ia->bad_mask[k]) { |
62e76326 | 1334 | ia->bad_mask[k] = TRUE; |
1335 | ia->badcount++; | |
a12a049a | 1336 | i->expires = XMIN(squid_curtime + XMAX((time_t)60, Config.negativeDnsTtl), i->expires); |
cc192b50 | 1337 | debugs(14, 2, "ipcacheMarkBadAddr: " << name << " " << addr ); |
22c653cd | 1338 | } |
62e76326 | 1339 | |
63be0a78 | 1340 | /** then calls ipcacheCycleAddr() to advance the current pointer to the next OK address. */ |
52926044 | 1341 | ipcacheCycleAddr(name, ia); |
e5f6c5c2 | 1342 | } |
56e15c50 | 1343 | |
63be0a78 | 1344 | /// \ingroup IPCacheAPI |
22c653cd | 1345 | void |
ad61a2b4 | 1346 | ipcacheMarkGoodAddr(const char *name, IpAddress &addr) |
22c653cd | 1347 | { |
1348 | ipcache_entry *i; | |
1349 | ipcache_addrs *ia; | |
1350 | int k; | |
62e76326 | 1351 | |
22c653cd | 1352 | if ((i = ipcache_get(name)) == NULL) |
62e76326 | 1353 | return; |
1354 | ||
22c653cd | 1355 | ia = &i->addrs; |
62e76326 | 1356 | |
26ac0430 | 1357 | for (k = 0; k < (int) ia->count; k++) { |
cc192b50 | 1358 | if (addr == ia->in_addrs[k]) |
62e76326 | 1359 | break; |
22c653cd | 1360 | } |
62e76326 | 1361 | |
52926044 | 1362 | if (k == (int) ia->count) /* not found */ |
62e76326 | 1363 | return; |
1364 | ||
52926044 | 1365 | if (!ia->bad_mask[k]) /* already OK */ |
62e76326 | 1366 | return; |
1367 | ||
52926044 | 1368 | ia->bad_mask[k] = FALSE; |
62e76326 | 1369 | |
52926044 | 1370 | ia->badcount--; |
62e76326 | 1371 | |
cc192b50 | 1372 | debugs(14, 2, "ipcacheMarkGoodAddr: " << name << " " << addr ); |
22c653cd | 1373 | } |
1374 | ||
63be0a78 | 1375 | /// \ingroup IPCacheInternal |
ec878047 | 1376 | static void |
1377 | ipcacheFreeEntry(void *data) | |
1378 | { | |
e6ccf245 | 1379 | ipcache_entry *i = (ipcache_entry *)data; |
ec878047 | 1380 | safe_free(i->addrs.in_addrs); |
1381 | safe_free(i->addrs.bad_mask); | |
186477c1 | 1382 | safe_free(i->hash.key); |
ec878047 | 1383 | safe_free(i->error_message); |
db1cd23c | 1384 | memFree(i, MEM_IPCACHE_ENTRY); |
ec878047 | 1385 | } |
1386 | ||
63be0a78 | 1387 | /// \ingroup IPCacheAPI |
56e15c50 | 1388 | void |
1389 | ipcacheFreeMemory(void) | |
1390 | { | |
ec878047 | 1391 | hashFreeItems(ip_table, ipcacheFreeEntry); |
56e15c50 | 1392 | hashFreeMemory(ip_table); |
afe95a7e | 1393 | ip_table = NULL; |
56e15c50 | 1394 | } |
3fb036e8 | 1395 | |
63be0a78 | 1396 | /** |
1397 | \ingroup IPCacheAPI | |
1398 | * | |
1399 | * Recalculate IP cache size upon reconfigure. | |
1400 | * Is called to clear the IPCache's data structures, | |
1401 | * cancel all pending requests. | |
1402 | */ | |
429fdbec | 1403 | void |
1404 | ipcache_restart(void) | |
1405 | { | |
429fdbec | 1406 | ipcache_high = (long) (((float) Config.ipcache.size * |
62e76326 | 1407 | (float) Config.ipcache.high) / (float) 100); |
429fdbec | 1408 | ipcache_low = (long) (((float) Config.ipcache.size * |
62e76326 | 1409 | (float) Config.ipcache.low) / (float) 100); |
0e70aa1e | 1410 | purge_entries_fromhosts(); |
1411 | } | |
1412 | ||
63be0a78 | 1413 | /** |
1414 | \ingroup IPCacheAPI | |
1415 | * | |
1416 | * Adds a "static" entry from /etc/hosts | |
1417 | * | |
1418 | \param name Hostname to be linked with IP | |
1419 | \param ipaddr IP Address to be cached. | |
1420 | * | |
1421 | \retval 0 Success. | |
1422 | \retval 1 IP address is invalid or other error. | |
0e70aa1e | 1423 | */ |
1424 | int | |
1425 | ipcacheAddEntryFromHosts(const char *name, const char *ipaddr) | |
1426 | { | |
1427 | ipcache_entry *i; | |
62e76326 | 1428 | |
ad61a2b4 | 1429 | IpAddress ip; |
62e76326 | 1430 | |
cc192b50 | 1431 | if (!(ip = ipaddr)) { |
1432 | #if USE_IPV6 | |
62e76326 | 1433 | if (strchr(ipaddr, ':') && strspn(ipaddr, "0123456789abcdefABCDEF:") == strlen(ipaddr)) { |
bf8fe701 | 1434 | debugs(14, 3, "ipcacheAddEntryFromHosts: Skipping IPv6 address '" << ipaddr << "'"); |
62e76326 | 1435 | } else { |
bf8fe701 | 1436 | debugs(14, 1, "ipcacheAddEntryFromHosts: Bad IP address '" << ipaddr << "'"); |
62e76326 | 1437 | } |
cc192b50 | 1438 | #else |
26ac0430 | 1439 | debugs(14, 1, "ipcacheAddEntryFromHosts: Bad IP address '" << ipaddr << "'"); |
cc192b50 | 1440 | #endif |
62e76326 | 1441 | |
1442 | return 1; | |
0e70aa1e | 1443 | } |
62e76326 | 1444 | |
0e70aa1e | 1445 | if ((i = ipcache_get(name))) { |
62e76326 | 1446 | if (1 == i->flags.fromhosts) { |
1447 | ipcacheUnlockEntry(i); | |
1448 | } else if (i->locks > 0) { | |
bf8fe701 | 1449 | debugs(14, 1, "ipcacheAddEntryFromHosts: can't add static entry for locked name '" << name << "'"); |
62e76326 | 1450 | return 1; |
1451 | } else { | |
1452 | ipcacheRelease(i); | |
1453 | } | |
0e70aa1e | 1454 | } |
62e76326 | 1455 | |
0e70aa1e | 1456 | i = ipcacheCreateEntry(name); |
1457 | i->addrs.count = 1; | |
1458 | i->addrs.cur = 0; | |
1459 | i->addrs.badcount = 0; | |
62e76326 | 1460 | |
23f6a720 | 1461 | i->addrs.in_addrs = (IpAddress *)xcalloc(1, sizeof(IpAddress)); |
e6ccf245 | 1462 | i->addrs.bad_mask = (unsigned char *)xcalloc(1, sizeof(unsigned char)); |
cc192b50 | 1463 | i->addrs.in_addrs[0] = ip; |
0e70aa1e | 1464 | i->addrs.bad_mask[0] = FALSE; |
1465 | i->flags.fromhosts = 1; | |
1466 | ipcacheAddEntry(i); | |
1467 | ipcacheLockEntry(i); | |
1468 | return 0; | |
429fdbec | 1469 | } |
ce75f381 | 1470 | |
1471 | #ifdef SQUID_SNMP | |
63be0a78 | 1472 | /** |
1473 | \ingroup IPCacheAPI | |
1474 | * | |
135171fe | 1475 | * The function to return the ip cache statistics to via SNMP |
1476 | */ | |
86115da5 | 1477 | variable_list * |
1f5b542b | 1478 | snmp_netIpFn(variable_list * Var, snint * ErrP) |
d60c11be | 1479 | { |
736eb6ad | 1480 | variable_list *Answer = NULL; |
bf8fe701 | 1481 | debugs(49, 5, "snmp_netIpFn: Processing request:"); |
1f5b542b | 1482 | snmpDebugOid(5, Var->name, Var->name_length); |
86115da5 | 1483 | *ErrP = SNMP_ERR_NOERROR; |
62e76326 | 1484 | |
135171fe | 1485 | switch (Var->name[LEN_SQ_NET + 1]) { |
62e76326 | 1486 | |
1f5b542b | 1487 | case IP_ENT: |
62e76326 | 1488 | Answer = snmp_var_new_integer(Var->name, Var->name_length, |
1489 | memInUse(MEM_IPCACHE_ENTRY), | |
1490 | SMI_GAUGE32); | |
1491 | break; | |
1492 | ||
1f5b542b | 1493 | case IP_REQ: |
62e76326 | 1494 | Answer = snmp_var_new_integer(Var->name, Var->name_length, |
1495 | IpcacheStats.requests, | |
1496 | SMI_COUNTER32); | |
1497 | break; | |
1498 | ||
1f5b542b | 1499 | case IP_HITS: |
62e76326 | 1500 | Answer = snmp_var_new_integer(Var->name, Var->name_length, |
1501 | IpcacheStats.hits, | |
1502 | SMI_COUNTER32); | |
1503 | break; | |
1504 | ||
1f5b542b | 1505 | case IP_PENDHIT: |
62e76326 | 1506 | Answer = snmp_var_new_integer(Var->name, Var->name_length, |
1507 | 0, | |
1508 | SMI_GAUGE32); | |
1509 | break; | |
1510 | ||
1f5b542b | 1511 | case IP_NEGHIT: |
62e76326 | 1512 | Answer = snmp_var_new_integer(Var->name, Var->name_length, |
1513 | IpcacheStats.negative_hits, | |
1514 | SMI_COUNTER32); | |
1515 | break; | |
1516 | ||
1f5b542b | 1517 | case IP_MISS: |
62e76326 | 1518 | Answer = snmp_var_new_integer(Var->name, Var->name_length, |
1519 | IpcacheStats.misses, | |
1520 | SMI_COUNTER32); | |
1521 | break; | |
1522 | ||
1f5b542b | 1523 | case IP_GHBN: |
62e76326 | 1524 | Answer = snmp_var_new_integer(Var->name, Var->name_length, |
1525 | 0, /* deprecated */ | |
1526 | SMI_COUNTER32); | |
1527 | break; | |
1528 | ||
1f5b542b | 1529 | case IP_LOC: |
62e76326 | 1530 | Answer = snmp_var_new_integer(Var->name, Var->name_length, |
1531 | 0, /* deprecated */ | |
1532 | SMI_COUNTER32); | |
1533 | break; | |
1534 | ||
ce75f381 | 1535 | default: |
62e76326 | 1536 | *ErrP = SNMP_ERR_NOSUCHNAME; |
1537 | snmp_var_free(Answer); | |
1538 | return (NULL); | |
86115da5 | 1539 | } |
62e76326 | 1540 | |
86115da5 | 1541 | return Answer; |
ce75f381 | 1542 | } |
1f5b542b | 1543 | |
135171fe | 1544 | #endif /*SQUID_SNMP */ |