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41462d93 | 1 | |
2 | /* | |
77b32a34 | 3 | * $Id: forward.cc,v 1.41 1999/01/08 21:12:10 wessels Exp $ |
41462d93 | 4 | * |
5 | * DEBUG: section 17 Request Forwarding | |
6 | * AUTHOR: Duane Wessels | |
7 | * | |
8 | * SQUID Internet Object Cache http://squid.nlanr.net/Squid/ | |
e25c139f | 9 | * ---------------------------------------------------------- |
41462d93 | 10 | * |
11 | * Squid is the result of efforts by numerous individuals from the | |
12 | * Internet community. Development is led by Duane Wessels of the | |
e25c139f | 13 | * National Laboratory for Applied Network Research and funded by the |
14 | * National Science Foundation. Squid is Copyrighted (C) 1998 by | |
15 | * Duane Wessels and the University of California San Diego. Please | |
16 | * see the COPYRIGHT file for full details. Squid incorporates | |
17 | * software developed and/or copyrighted by other sources. Please see | |
18 | * the CREDITS file for full details. | |
41462d93 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
41462d93 | 34 | */ |
35 | ||
36 | ||
37 | #include "squid.h" | |
38 | ||
db1cd23c | 39 | static PSC fwdStartComplete; |
6801f8a8 | 40 | static void fwdDispatch(FwdState *); |
910169e5 | 41 | static void fwdConnectStart(FwdState * fwdState); |
42 | static void fwdStateFree(FwdState * fwdState); | |
43 | static PF fwdConnectTimeout; | |
44 | static PF fwdServerClosed; | |
45 | static CNCB fwdConnectDone; | |
68bd6892 | 46 | static int fwdCheckRetry(FwdState * fwdState); |
db1cd23c | 47 | static int fwdReforward(FwdState *); |
48 | static void fwdStartFail(FwdState *); | |
8ddcc35d | 49 | static void fwdLogReplyStatus(int tries, http_status status); |
50 | static OBJH fwdStats; | |
51 | ||
52 | #define MAX_FWD_STATS_IDX 9 | |
9977e14b | 53 | static int FwdReplyCodes[MAX_FWD_STATS_IDX + 1][HTTP_INVALID_HEADER + 1]; |
db1cd23c | 54 | |
55 | static void | |
56 | fwdServerFree(FwdServer * fs) | |
57 | { | |
58 | if (fs->peer) | |
59 | cbdataUnlock(fs->peer); | |
60 | memFree(fs, MEM_FWD_SERVER); | |
61 | } | |
62 | ||
63 | static void | |
64 | fwdServersFree(FwdServer ** FS) | |
65 | { | |
66 | FwdServer *fs; | |
67 | while ((fs = *FS)) { | |
68 | *FS = fs->next; | |
69 | fwdServerFree(fs); | |
70 | } | |
71 | } | |
41462d93 | 72 | |
73 | static void | |
4ca83e82 | 74 | fwdStateFree(FwdState * fwdState) |
41462d93 | 75 | { |
f563eea9 | 76 | StoreEntry *e = fwdState->entry; |
77 | ErrorState *err; | |
6801f8a8 | 78 | int sfd; |
79 | static int loop_detect = 0; | |
0bdf2621 | 80 | debug(17, 3) ("fwdStateFree: %p\n", fwdState); |
6801f8a8 | 81 | assert(loop_detect++ == 0); |
f563eea9 | 82 | assert(e->mem_obj); |
1640c2df | 83 | if (e->store_status == STORE_PENDING) { |
84 | if (e->mem_obj->inmem_hi == 0) { | |
85 | assert(fwdState->fail.err_code); | |
86 | err = errorCon(fwdState->fail.err_code, fwdState->fail.http_code); | |
87 | err->request = requestLink(fwdState->request); | |
88 | err->xerrno = fwdState->fail.xerrno; | |
89 | errorAppendEntry(e, err); | |
1640c2df | 90 | } |
f563eea9 | 91 | } |
db1cd23c | 92 | fwdServersFree(&fwdState->servers); |
41462d93 | 93 | requestUnlink(fwdState->request); |
4ca83e82 | 94 | fwdState->request = NULL; |
f563eea9 | 95 | storeUnregisterAbort(e); |
96 | storeUnlockObject(e); | |
4ca83e82 | 97 | fwdState->entry = NULL; |
6801f8a8 | 98 | sfd = fwdState->server_fd; |
99 | if (sfd > -1) { | |
100 | comm_remove_close_handler(sfd, fwdServerClosed, fwdState); | |
101 | fwdState->server_fd = -1; | |
32b2931b | 102 | debug(17, 3) ("fwdStateFree: closing FD %d\n", sfd); |
6801f8a8 | 103 | comm_close(sfd); |
104 | } | |
41462d93 | 105 | cbdataFree(fwdState); |
6801f8a8 | 106 | loop_detect--; |
41462d93 | 107 | } |
108 | ||
68bd6892 | 109 | static int |
110 | fwdCheckRetry(FwdState * fwdState) | |
111 | { | |
1640c2df | 112 | if (fwdState->entry->store_status != STORE_PENDING) |
113 | return 0; | |
68bd6892 | 114 | if (fwdState->entry->mem_obj->inmem_hi > 0) |
115 | return 0; | |
116 | if (fwdState->n_tries > 10) | |
117 | return 0; | |
118 | if (squid_curtime - fwdState->start > 120) | |
119 | return 0; | |
1d22e062 | 120 | if (pumpMethod(fwdState->request->method)) |
121 | if (0 == pumpRestart(fwdState->request)) | |
122 | return 0; | |
68bd6892 | 123 | return 1; |
124 | } | |
125 | ||
910169e5 | 126 | static void |
127 | fwdServerClosed(int fd, void *data) | |
128 | { | |
4ca83e82 | 129 | FwdState *fwdState = data; |
68bd6892 | 130 | debug(17, 3) ("fwdServerClosed: FD %d %s\n", fd, storeUrl(fwdState->entry)); |
6801f8a8 | 131 | assert(fwdState->server_fd == fd); |
132 | fwdState->server_fd = -1; | |
68bd6892 | 133 | if (fwdCheckRetry(fwdState)) { |
32b2931b | 134 | debug(17, 3) ("fwdServerClosed: re-forwarding (%d tries, %d secs)\n", |
9dbf253d | 135 | fwdState->n_tries, |
136 | (int) (squid_curtime - fwdState->start)); | |
f563eea9 | 137 | fwdConnectStart(fwdState); |
138 | } else { | |
139 | fwdStateFree(fwdState); | |
140 | } | |
910169e5 | 141 | } |
142 | ||
41462d93 | 143 | static void |
144 | fwdConnectDone(int server_fd, int status, void *data) | |
145 | { | |
146 | FwdState *fwdState = data; | |
db1cd23c | 147 | FwdServer *fs = fwdState->servers; |
41462d93 | 148 | ErrorState *err; |
db1cd23c | 149 | request_t *request = fwdState->request; |
6801f8a8 | 150 | assert(fwdState->server_fd == server_fd); |
41462d93 | 151 | if (status == COMM_ERR_DNS) { |
152 | debug(17, 4) ("fwdConnectDone: Unknown host: %s\n", | |
db1cd23c | 153 | request->host); |
41462d93 | 154 | err = errorCon(ERR_DNS_FAIL, HTTP_SERVICE_UNAVAILABLE); |
155 | err->dnsserver_msg = xstrdup(dns_error_message); | |
db1cd23c | 156 | err->request = requestLink(request); |
41462d93 | 157 | errorAppendEntry(fwdState->entry, err); |
158 | comm_close(server_fd); | |
159 | } else if (status != COMM_OK) { | |
db1cd23c | 160 | assert(fs); |
41462d93 | 161 | err = errorCon(ERR_CONNECT_FAIL, HTTP_SERVICE_UNAVAILABLE); |
162 | err->xerrno = errno; | |
db1cd23c | 163 | if (fs->peer) { |
164 | err->host = xstrdup(fs->peer->host); | |
165 | err->port = fs->peer->http_port; | |
166 | } else { | |
167 | err->host = xstrdup(request->host); | |
168 | err->port = request->port; | |
169 | } | |
170 | err->request = requestLink(request); | |
41462d93 | 171 | errorAppendEntry(fwdState->entry, err); |
db1cd23c | 172 | if (fs->peer) |
173 | peerCheckConnectStart(fs->peer); | |
41462d93 | 174 | comm_close(server_fd); |
175 | } else { | |
176 | fd_note(server_fd, storeUrl(fwdState->entry)); | |
177 | fd_table[server_fd].uses++; | |
6801f8a8 | 178 | fwdDispatch(fwdState); |
41462d93 | 179 | } |
41462d93 | 180 | } |
181 | ||
182 | static void | |
183 | fwdConnectTimeout(int fd, void *data) | |
184 | { | |
185 | FwdState *fwdState = data; | |
186 | StoreEntry *entry = fwdState->entry; | |
187 | ErrorState *err; | |
188 | debug(17, 3) ("fwdConnectTimeout: FD %d: '%s'\n", fd, storeUrl(entry)); | |
6801f8a8 | 189 | assert(fd == fwdState->server_fd); |
41462d93 | 190 | if (entry->mem_obj->inmem_hi == 0) { |
191 | err = errorCon(ERR_READ_TIMEOUT, HTTP_GATEWAY_TIMEOUT); | |
192 | err->request = requestLink(fwdState->request); | |
193 | errorAppendEntry(entry, err); | |
41462d93 | 194 | } |
195 | comm_close(fd); | |
196 | } | |
197 | ||
198 | static void | |
199 | fwdConnectStart(FwdState * fwdState) | |
200 | { | |
201 | const char *url = storeUrl(fwdState->entry); | |
202 | int fd; | |
203 | ErrorState *err; | |
db1cd23c | 204 | FwdServer *fs = fwdState->servers; |
205 | const char *host; | |
206 | unsigned short port; | |
207 | assert(fs); | |
cddc721b | 208 | assert(fwdState->server_fd == -1); |
41462d93 | 209 | debug(17, 3) ("fwdConnectStart: %s\n", url); |
db1cd23c | 210 | if (fs->peer) { |
211 | host = fs->peer->host; | |
212 | port = fs->peer->http_port; | |
213 | } else { | |
214 | host = fwdState->request->host; | |
215 | port = fwdState->request->port; | |
216 | } | |
0bdf2621 | 217 | hierarchyNote(&fwdState->request->hier, fs->code, host); |
db1cd23c | 218 | if ((fd = pconnPop(host, port)) >= 0) { |
41462d93 | 219 | debug(17, 3) ("fwdConnectStart: reusing pconn FD %d\n", fd); |
9dbf253d | 220 | fwdState->server_fd = fd; |
9977e14b | 221 | fwdState->n_tries++; |
910169e5 | 222 | comm_add_close_handler(fd, fwdServerClosed, fwdState); |
41462d93 | 223 | fwdConnectDone(fd, COMM_OK, fwdState); |
224 | return; | |
225 | } | |
226 | fd = comm_open(SOCK_STREAM, | |
227 | 0, | |
228 | Config.Addrs.tcp_outgoing, | |
229 | 0, | |
230 | COMM_NONBLOCKING, | |
231 | url); | |
232 | if (fd < 0) { | |
233 | debug(50, 4) ("fwdConnectStart: %s\n", xstrerror()); | |
234 | err = errorCon(ERR_SOCKET_FAILURE, HTTP_INTERNAL_SERVER_ERROR); | |
235 | err->xerrno = errno; | |
236 | err->request = requestLink(fwdState->request); | |
237 | errorAppendEntry(fwdState->entry, err); | |
910169e5 | 238 | fwdStateFree(fwdState); |
41462d93 | 239 | return; |
240 | } | |
6801f8a8 | 241 | fwdState->server_fd = fd; |
68bd6892 | 242 | fwdState->n_tries++; |
910169e5 | 243 | comm_add_close_handler(fd, fwdServerClosed, fwdState); |
41462d93 | 244 | commSetTimeout(fd, |
245 | Config.Timeout.connect, | |
246 | fwdConnectTimeout, | |
247 | fwdState); | |
db1cd23c | 248 | commConnectStart(fd, host, port, fwdConnectDone, fwdState); |
41462d93 | 249 | } |
250 | ||
251 | static void | |
db1cd23c | 252 | fwdStartComplete(FwdServer * servers, void *data) |
41462d93 | 253 | { |
254 | FwdState *fwdState = data; | |
db1cd23c | 255 | if (servers != NULL) { |
256 | fwdState->servers = servers; | |
257 | fwdConnectStart(fwdState); | |
41462d93 | 258 | } else { |
db1cd23c | 259 | fwdStartFail(fwdState); |
41462d93 | 260 | } |
41462d93 | 261 | } |
262 | ||
263 | static void | |
db1cd23c | 264 | fwdStartFail(FwdState * fwdState) |
41462d93 | 265 | { |
41462d93 | 266 | ErrorState *err; |
41462d93 | 267 | err = errorCon(ERR_CANNOT_FORWARD, HTTP_SERVICE_UNAVAILABLE); |
268 | err->request = requestLink(fwdState->request); | |
269 | errorAppendEntry(fwdState->entry, err); | |
910169e5 | 270 | fwdStateFree(fwdState); |
41462d93 | 271 | } |
910169e5 | 272 | |
41462d93 | 273 | static void |
6801f8a8 | 274 | fwdDispatch(FwdState * fwdState) |
41462d93 | 275 | { |
276 | peer *p; | |
277 | request_t *request = fwdState->request; | |
278 | StoreEntry *entry = fwdState->entry; | |
279 | debug(17, 5) ("fwdDispatch: FD %d: Fetching '%s %s'\n", | |
910169e5 | 280 | fwdState->client_fd, |
41462d93 | 281 | RequestMethodStr[request->method], |
282 | storeUrl(entry)); | |
d46a87a8 | 283 | /*assert(!EBIT_TEST(entry->flags, ENTRY_DISPATCHED)); */ |
41462d93 | 284 | assert(entry->ping_status != PING_WAITING); |
4ca83e82 | 285 | assert(entry->lock_count); |
d46a87a8 | 286 | EBIT_SET(entry->flags, ENTRY_DISPATCHED); |
41462d93 | 287 | netdbPingSite(request->host); |
e0ebe27c | 288 | /* |
289 | * Assert that server_fd is set. This is to guarantee that fwdState | |
290 | * is attached to something and will be deallocated when server_fd | |
291 | * is closed. | |
292 | */ | |
293 | assert(fwdState->server_fd > -1); | |
41462d93 | 294 | if (fwdState->servers && (p = fwdState->servers->peer)) { |
295 | p->stats.fetches++; | |
db1cd23c | 296 | httpStart(fwdState); |
41462d93 | 297 | } else { |
298 | switch (request->protocol) { | |
299 | case PROTO_HTTP: | |
db1cd23c | 300 | httpStart(fwdState); |
41462d93 | 301 | break; |
302 | case PROTO_GOPHER: | |
db1cd23c | 303 | gopherStart(fwdState); |
41462d93 | 304 | break; |
305 | case PROTO_FTP: | |
db1cd23c | 306 | ftpStart(fwdState); |
41462d93 | 307 | break; |
308 | case PROTO_WAIS: | |
db1cd23c | 309 | waisStart(fwdState); |
41462d93 | 310 | break; |
311 | case PROTO_CACHEOBJ: | |
e0ebe27c | 312 | case PROTO_INTERNAL: |
41462d93 | 313 | case PROTO_URN: |
ae0b4725 | 314 | fatal_dump("Should never get here"); |
41462d93 | 315 | break; |
316 | case PROTO_WHOIS: | |
db1cd23c | 317 | whoisStart(fwdState); |
41462d93 | 318 | break; |
41462d93 | 319 | default: |
ce45d320 | 320 | debug(17, 1) ("fwdDispatch: Cannot retrieve '%s'\n", |
321 | storeUrl(entry)); | |
c68e9c6b | 322 | fwdFail(fwdState, ERR_UNSUP_REQ, HTTP_BAD_REQUEST, -1); |
323 | comm_close(fwdState->server_fd); | |
ce45d320 | 324 | break; |
41462d93 | 325 | } |
326 | } | |
327 | } | |
328 | ||
db1cd23c | 329 | static int |
330 | fwdReforward(FwdState * fwdState) | |
331 | { | |
332 | StoreEntry *e = fwdState->entry; | |
333 | FwdServer *fs = fwdState->servers; | |
334 | http_status s; | |
335 | assert(e->store_status == STORE_PENDING); | |
336 | assert(e->mem_obj); | |
d6eb18d6 | 337 | if (!EBIT_TEST(e->flags, ENTRY_FWD_HDR_WAIT)) { |
338 | debug(17, 3) ("fwdReforward: No, ENTRY_FWD_HDR_WAIT isn't set\n"); | |
339 | return 0; | |
340 | } | |
db1cd23c | 341 | if (fwdState->n_tries > 9) |
342 | return 0; | |
d2946396 | 343 | if (pumpMethod(fwdState->request->method)) |
344 | if (0 == pumpRestart(fwdState->request)) | |
345 | return 0; | |
db1cd23c | 346 | assert(fs); |
347 | fwdState->servers = fs->next; | |
348 | fwdServerFree(fs); | |
349 | if (fwdState->servers == NULL) { | |
350 | debug(17, 3) ("fwdReforward: No forward-servers left\n"); | |
351 | return 0; | |
352 | } | |
353 | s = e->mem_obj->reply->sline.status; | |
354 | debug(17, 3) ("fwdReforward: status %d\n", (int) s); | |
355 | switch (s) { | |
356 | case HTTP_FORBIDDEN: | |
357 | case HTTP_INTERNAL_SERVER_ERROR: | |
358 | case HTTP_NOT_IMPLEMENTED: | |
359 | case HTTP_BAD_GATEWAY: | |
360 | case HTTP_SERVICE_UNAVAILABLE: | |
361 | case HTTP_GATEWAY_TIMEOUT: | |
362 | return 1; | |
363 | default: | |
364 | return 0; | |
365 | } | |
366 | /* NOTREACHED */ | |
367 | } | |
368 | ||
41462d93 | 369 | /* PUBLIC FUNCTIONS */ |
370 | ||
41462d93 | 371 | void |
db1cd23c | 372 | fwdStart(int fd, StoreEntry * e, request_t * r, struct in_addr client_addr) |
41462d93 | 373 | { |
374 | FwdState *fwdState; | |
d1061d2b | 375 | aclCheck_t ch; |
376 | int answer; | |
377 | ErrorState *err; | |
5843eb62 | 378 | /* |
db1cd23c | 379 | * client_addr == no_addr indicates this is an "internal" request |
5843eb62 | 380 | * from peer_digest.c, asn.c, netdb.c, etc and should always |
381 | * be allowed. yuck, I know. | |
d1061d2b | 382 | */ |
db1cd23c | 383 | if (client_addr.s_addr != no_addr.s_addr) { |
5843eb62 | 384 | /* |
385 | * Check if this host is allowed to fetch MISSES from us (miss_access) | |
386 | */ | |
387 | memset(&ch, '\0', sizeof(aclCheck_t)); | |
db1cd23c | 388 | ch.src_addr = client_addr; |
5843eb62 | 389 | ch.request = r; |
390 | answer = aclCheckFast(Config.accessList.miss, &ch); | |
391 | if (answer == 0) { | |
392 | err = errorCon(ERR_FORWARDING_DENIED, HTTP_FORBIDDEN); | |
393 | err->request = requestLink(r); | |
db1cd23c | 394 | err->src_addr = client_addr; |
5843eb62 | 395 | errorAppendEntry(e, err); |
396 | return; | |
397 | } | |
d1061d2b | 398 | } |
399 | debug(17, 3) ("fwdStart: '%s'\n", storeUrl(e)); | |
400 | e->mem_obj->request = requestLink(r); | |
401 | e->mem_obj->fd = fd; | |
402 | switch (r->protocol) { | |
0cdcddb9 | 403 | /* |
404 | * Note, don't create fwdState for these requests | |
405 | */ | |
e0ebe27c | 406 | case PROTO_INTERNAL: |
d1061d2b | 407 | internalStart(r, e); |
e0ebe27c | 408 | return; |
409 | case PROTO_CACHEOBJ: | |
d1061d2b | 410 | cachemgrStart(fd, r, e); |
e0ebe27c | 411 | return; |
ae0b4725 | 412 | case PROTO_URN: |
413 | urnStart(r, e); | |
414 | return; | |
e0ebe27c | 415 | default: |
416 | break; | |
417 | } | |
798b0889 | 418 | fwdState = memAllocate(MEM_FWD_STATE); |
db1cd23c | 419 | cbdataAdd(fwdState, memFree, MEM_FWD_STATE); |
d1061d2b | 420 | fwdState->entry = e; |
910169e5 | 421 | fwdState->client_fd = fd; |
6801f8a8 | 422 | fwdState->server_fd = -1; |
d1061d2b | 423 | fwdState->request = requestLink(r); |
f563eea9 | 424 | fwdState->start = squid_curtime; |
d1061d2b | 425 | storeLockObject(e); |
426 | storeRegisterAbort(e, fwdAbort, fwdState); | |
db1cd23c | 427 | peerSelect(r, e, fwdStartComplete, fwdState); |
41462d93 | 428 | } |
429 | ||
41462d93 | 430 | int |
431 | fwdCheckDeferRead(int fdnotused, void *data) | |
432 | { | |
433 | StoreEntry *e = data; | |
434 | MemObject *mem = e->mem_obj; | |
435 | if (mem == NULL) | |
436 | return 0; | |
447e176b | 437 | #if DELAY_POOLS |
438 | if (delayMostBytesWanted(mem, 1) == 0) | |
439 | return 1; | |
440 | #endif | |
41462d93 | 441 | if (mem->inmem_hi - storeLowestMemReaderOffset(e) < READ_AHEAD_GAP) |
442 | return 0; | |
443 | return 1; | |
444 | } | |
910169e5 | 445 | |
446 | void | |
4ca83e82 | 447 | fwdFail(FwdState * fwdState, int err_code, http_status http_code, int xerrno) |
910169e5 | 448 | { |
d46a87a8 | 449 | assert(EBIT_TEST(fwdState->entry->flags, ENTRY_FWD_HDR_WAIT)); |
32b2931b | 450 | debug(17, 3) ("fwdFail: %s \"%s\"\n\t%s\n", |
4ca83e82 | 451 | err_type_str[err_code], |
452 | httpStatusString(http_code), | |
453 | storeUrl(fwdState->entry)); | |
454 | fwdState->fail.err_code = err_code; | |
455 | fwdState->fail.http_code = http_code; | |
456 | fwdState->fail.xerrno = xerrno; | |
910169e5 | 457 | } |
6801f8a8 | 458 | |
459 | /* | |
460 | * Called when someone else calls StoreAbort() on this entry | |
461 | */ | |
462 | void | |
463 | fwdAbort(void *data) | |
464 | { | |
9dbf253d | 465 | FwdState *fwdState = data; |
32b2931b | 466 | debug(17, 3) ("fwdAbort: %s\n", storeUrl(fwdState->entry)); |
9dbf253d | 467 | fwdStateFree(fwdState); |
6801f8a8 | 468 | } |
0b49cd31 | 469 | |
470 | /* | |
471 | * Frees fwdState without closing FD or generating an abort | |
472 | */ | |
473 | void | |
9dbf253d | 474 | fwdUnregister(int fd, FwdState * fwdState) |
0b49cd31 | 475 | { |
9dbf253d | 476 | debug(17, 3) ("fwdUnregister: %s\n", storeUrl(fwdState->entry)); |
477 | assert(fd = fwdState->server_fd); | |
478 | comm_remove_close_handler(fd, fwdServerClosed, fwdState); | |
479 | fwdState->server_fd = -1; | |
0b49cd31 | 480 | } |
db1cd23c | 481 | |
482 | /* | |
483 | * server-side modules call fwdComplete() when they are done | |
484 | * downloading an object. Then, we either 1) re-forward the | |
485 | * request somewhere else if needed, or 2) call storeComplete() | |
486 | * to finish it off | |
487 | */ | |
488 | void | |
489 | fwdComplete(FwdState * fwdState) | |
490 | { | |
491 | StoreEntry *e = fwdState->entry; | |
492 | assert(e->store_status == STORE_PENDING); | |
8a28f65f | 493 | debug(17, 3) ("fwdComplete: %s\n\tstatus %d\n", storeUrl(e), |
db1cd23c | 494 | e->mem_obj->reply->sline.status); |
9977e14b | 495 | fwdLogReplyStatus(fwdState->n_tries, e->mem_obj->reply->sline.status); |
d6eb18d6 | 496 | if (fwdReforward(fwdState)) { |
77b32a34 | 497 | debug(17, 3) ("fwdComplete: re-forwarding %d %s\n", |
0bdf2621 | 498 | e->mem_obj->reply->sline.status, |
499 | storeUrl(e)); | |
8a28f65f | 500 | if (fwdState->server_fd > -1) |
0bdf2621 | 501 | fwdUnregister(fwdState->server_fd, fwdState); |
db1cd23c | 502 | storeEntryReset(e); |
503 | fwdStartComplete(fwdState->servers, fwdState); | |
504 | } else { | |
d6eb18d6 | 505 | debug(17, 3) ("fwdComplete: not re-forwarding status %d\n", |
506 | e->mem_obj->reply->sline.status); | |
db1cd23c | 507 | EBIT_CLR(e->flags, ENTRY_FWD_HDR_WAIT); |
508 | storeComplete(e); | |
d6eb18d6 | 509 | /* |
510 | * If fwdState isn't associated with a server FD, it | |
511 | * won't get freed unless we do it here. | |
512 | */ | |
513 | if (fwdState->server_fd < 0) | |
514 | fwdStateFree(fwdState); | |
db1cd23c | 515 | } |
516 | } | |
8ddcc35d | 517 | |
518 | void | |
519 | fwdInit(void) | |
520 | { | |
9977e14b | 521 | cachemgrRegister("forward", |
522 | "Request Forwarding Statistics", | |
523 | fwdStats, 0, 1); | |
8ddcc35d | 524 | } |
525 | ||
526 | static void | |
527 | fwdLogReplyStatus(int tries, http_status status) | |
528 | { | |
529 | if (status > HTTP_INVALID_HEADER) | |
530 | return; | |
531 | assert(tries); | |
532 | tries--; | |
533 | if (tries > MAX_FWD_STATS_IDX) | |
534 | tries = MAX_FWD_STATS_IDX; | |
535 | FwdReplyCodes[tries][status]++; | |
536 | } | |
537 | ||
538 | static void | |
9977e14b | 539 | fwdStats(StoreEntry * s) |
8ddcc35d | 540 | { |
9977e14b | 541 | int i; |
542 | int j; | |
543 | storeAppendPrintf(s, "Status"); | |
544 | for (j = 0; j <= MAX_FWD_STATS_IDX; j++) { | |
545 | storeAppendPrintf(s, "\ttry#%d", j + 1); | |
546 | } | |
547 | storeAppendPrintf(s, "\n"); | |
548 | for (i = 0; i <= (int) HTTP_INVALID_HEADER; i++) { | |
549 | if (FwdReplyCodes[0][i] == 0) | |
550 | continue; | |
551 | storeAppendPrintf(s, "%3d", i); | |
552 | for (j = 0; j <= MAX_FWD_STATS_IDX; j++) { | |
553 | storeAppendPrintf(s, "\t%d", FwdReplyCodes[j][i]); | |
8ddcc35d | 554 | } |
9977e14b | 555 | storeAppendPrintf(s, "\n"); |
556 | } | |
8ddcc35d | 557 | } |