pack: move find_sha1_pack()
[git/git.git] / http-walker.c
CommitLineData
6eb7ed54
DB
1#include "cache.h"
2#include "commit.h"
30ae764b 3#include "walker.h"
29508e1e 4#include "http.h"
94e99012 5#include "list.h"
abcbdc03 6#include "transport.h"
d6fe0036 7#include "packfile.h"
7baa3e86 8
9cba13ca 9struct alt_base {
2afea3bc 10 char *base;
b3661567
DB
11 int got_indices;
12 struct packed_git *packs;
13 struct alt_base *next;
14};
15
e388ab74 16enum object_request_state {
1d389ab6
NH
17 WAITING,
18 ABORTED,
19 ACTIVE,
4b05548f 20 COMPLETE
1d389ab6 21};
6eb7ed54 22
9cba13ca 23struct object_request {
30ae764b 24 struct walker *walker;
1d389ab6
NH
25 unsigned char sha1[20];
26 struct alt_base *repo;
e388ab74 27 enum object_request_state state;
5424bc55 28 struct http_object_request *req;
94e99012 29 struct list_head node;
1d389ab6
NH
30};
31
e388ab74 32struct alternates_request {
30ae764b 33 struct walker *walker;
8e29f6a0 34 const char *base;
54ba4c5f 35 struct strbuf *url;
028c2976 36 struct strbuf *buffer;
acc075a8
NH
37 struct active_request_slot *slot;
38 int http_specific;
39};
40
30ae764b
DB
41struct walker_data {
42 const char *url;
43 int got_alternates;
44 struct alt_base *alt;
30ae764b
DB
45};
46
94e99012 47static LIST_HEAD(object_queue_head);
bc8f2652 48
30ae764b 49static void fetch_alternates(struct walker *walker, const char *base);
1d389ab6 50
29508e1e 51static void process_object_response(void *callback_data);
1d389ab6 52
30ae764b
DB
53static void start_object_request(struct walker *walker,
54 struct object_request *obj_req)
1d389ab6 55{
1d389ab6 56 struct active_request_slot *slot;
5424bc55 57 struct http_object_request *req;
1d389ab6 58
5424bc55
TRC
59 req = new_http_object_request(obj_req->repo->base, obj_req->sha1);
60 if (req == NULL) {
e388ab74 61 obj_req->state = ABORTED;
1d389ab6
NH
62 return;
63 }
5424bc55 64 obj_req->req = req;
1d389ab6 65
5424bc55 66 slot = req->slot;
29508e1e 67 slot->callback_func = process_object_response;
e388ab74 68 slot->callback_data = obj_req;
1d389ab6 69
a7a8d378 70 /* Try to get the request started, abort the request on error */
e388ab74 71 obj_req->state = ACTIVE;
1d389ab6 72 if (!start_active_slot(slot)) {
e388ab74 73 obj_req->state = ABORTED;
5424bc55 74 release_http_object_request(req);
e388ab74 75 return;
1d389ab6 76 }
1d389ab6
NH
77}
78
e388ab74 79static void finish_object_request(struct object_request *obj_req)
1d389ab6 80{
5424bc55 81 if (finish_http_object_request(obj_req->req))
1d389ab6 82 return;
1d389ab6 83
5424bc55 84 if (obj_req->req->rename == 0)
30ae764b 85 walker_say(obj_req->walker, "got %s\n", sha1_to_hex(obj_req->sha1));
1d389ab6
NH
86}
87
29508e1e
NH
88static void process_object_response(void *callback_data)
89{
e388ab74
NH
90 struct object_request *obj_req =
91 (struct object_request *)callback_data;
30ae764b
DB
92 struct walker *walker = obj_req->walker;
93 struct walker_data *data = walker->data;
94 struct alt_base *alt = data->alt;
29508e1e 95
5424bc55 96 process_http_object_request(obj_req->req);
e388ab74 97 obj_req->state = COMPLETE;
29508e1e
NH
98
99 /* Use alternates if necessary */
5424bc55 100 if (missing_target(obj_req->req)) {
30ae764b 101 fetch_alternates(walker, alt->base);
e388ab74
NH
102 if (obj_req->repo->next != NULL) {
103 obj_req->repo =
104 obj_req->repo->next;
5424bc55 105 release_http_object_request(obj_req->req);
30ae764b 106 start_object_request(walker, obj_req);
29508e1e
NH
107 return;
108 }
109 }
110
e388ab74 111 finish_object_request(obj_req);
29508e1e
NH
112}
113
e388ab74 114static void release_object_request(struct object_request *obj_req)
1d389ab6 115{
5424bc55
TRC
116 if (obj_req->req !=NULL && obj_req->req->localfile != -1)
117 error("fd leakage in release: %d", obj_req->req->localfile);
1d389ab6 118
94e99012 119 list_del(&obj_req->node);
e388ab74 120 free(obj_req);
1d389ab6
NH
121}
122
a7a8d378 123#ifdef USE_CURL_MULTI
30ae764b 124static int fill_active_slot(struct walker *walker)
1d389ab6 125{
45c17412 126 struct object_request *obj_req;
94e99012 127 struct list_head *pos, *tmp, *head = &object_queue_head;
1d389ab6 128
94e99012
EW
129 list_for_each_safe(pos, tmp, head) {
130 obj_req = list_entry(pos, struct object_request, node);
e388ab74
NH
131 if (obj_req->state == WAITING) {
132 if (has_sha1_file(obj_req->sha1))
09db444f 133 obj_req->state = COMPLETE;
45c17412 134 else {
30ae764b 135 start_object_request(walker, obj_req);
45c17412
DB
136 return 1;
137 }
f1a906a3 138 }
8fcf7f9a 139 }
45c17412 140 return 0;
1d389ab6 141}
a7a8d378 142#endif
1d389ab6 143
30ae764b 144static void prefetch(struct walker *walker, unsigned char *sha1)
1d389ab6 145{
e388ab74 146 struct object_request *newreq;
30ae764b 147 struct walker_data *data = walker->data;
1d389ab6
NH
148
149 newreq = xmalloc(sizeof(*newreq));
30ae764b 150 newreq->walker = walker;
e702496e 151 hashcpy(newreq->sha1, sha1);
30ae764b 152 newreq->repo = data->alt;
1d389ab6 153 newreq->state = WAITING;
5424bc55 154 newreq->req = NULL;
1d389ab6 155
e9176745 156 http_is_verbose = walker->get_verbosely;
94e99012 157 list_add_tail(&newreq->node, &object_queue_head);
29508e1e 158
a7a8d378 159#ifdef USE_CURL_MULTI
29508e1e
NH
160 fill_active_slots();
161 step_active_slots();
a7a8d378 162#endif
1d389ab6
NH
163}
164
abcbdc03
JK
165static int is_alternate_allowed(const char *url)
166{
167 const char *protocols[] = {
168 "http", "https", "ftp", "ftps"
169 };
170 int i;
171
de461388
EW
172 if (http_follow_config != HTTP_FOLLOW_ALWAYS) {
173 warning("alternate disabled by http.followRedirects: %s", url);
174 return 0;
175 }
176
abcbdc03
JK
177 for (i = 0; i < ARRAY_SIZE(protocols); i++) {
178 const char *end;
179 if (skip_prefix(url, protocols[i], &end) &&
180 starts_with(end, "://"))
181 break;
182 }
183
184 if (i >= ARRAY_SIZE(protocols)) {
185 warning("ignoring alternate with unknown protocol: %s", url);
186 return 0;
187 }
188 if (!is_transport_allowed(protocols[i], 0)) {
189 warning("ignoring alternate with restricted protocol: %s", url);
190 return 0;
191 }
192
193 return 1;
194}
195
e388ab74 196static void process_alternates_response(void *callback_data)
b3661567 197{
e388ab74
NH
198 struct alternates_request *alt_req =
199 (struct alternates_request *)callback_data;
30ae764b
DB
200 struct walker *walker = alt_req->walker;
201 struct walker_data *cdata = walker->data;
acc075a8 202 struct active_request_slot *slot = alt_req->slot;
30ae764b 203 struct alt_base *tail = cdata->alt;
8e29f6a0 204 const char *base = alt_req->base;
a04ff3ec 205 const char null_byte = '\0';
acc075a8
NH
206 char *data;
207 int i = 0;
1d389ab6 208
acc075a8
NH
209 if (alt_req->http_specific) {
210 if (slot->curl_result != CURLE_OK ||
028c2976 211 !alt_req->buffer->len) {
acc075a8
NH
212
213 /* Try reusing the slot to get non-http alternates */
214 alt_req->http_specific = 0;
54ba4c5f
JK
215 strbuf_reset(alt_req->url);
216 strbuf_addf(alt_req->url, "%s/objects/info/alternates",
217 base);
acc075a8 218 curl_easy_setopt(slot->curl, CURLOPT_URL,
54ba4c5f 219 alt_req->url->buf);
acc075a8
NH
220 active_requests++;
221 slot->in_use = 1;
c9826473
NH
222 if (slot->finished != NULL)
223 (*slot->finished) = 0;
a3f583cb 224 if (!start_active_slot(slot)) {
30ae764b 225 cdata->got_alternates = -1;
29508e1e 226 slot->in_use = 0;
c9826473
NH
227 if (slot->finished != NULL)
228 (*slot->finished) = 1;
1d389ab6 229 }
a3f583cb 230 return;
b3661567 231 }
acc075a8 232 } else if (slot->curl_result != CURLE_OK) {
be4a015b 233 if (!missing_target(slot)) {
30ae764b 234 cdata->got_alternates = -1;
acc075a8
NH
235 return;
236 }
b3661567
DB
237 }
238
a04ff3ec 239 fwrite_buffer((char *)&null_byte, 1, 1, alt_req->buffer);
028c2976
MH
240 alt_req->buffer->len--;
241 data = alt_req->buffer->buf;
1b0c1e67 242
028c2976 243 while (i < alt_req->buffer->len) {
b3661567 244 int posn = i;
028c2976 245 while (posn < alt_req->buffer->len && data[posn] != '\n')
b3661567
DB
246 posn++;
247 if (data[posn] == '\n') {
1b0c1e67
DB
248 int okay = 0;
249 int serverlen = 0;
250 struct alt_base *newalt;
b3661567 251 if (data[i] == '/') {
4c42aa1a
TRC
252 /*
253 * This counts
5df1e0d0
JH
254 * http://git.host/pub/scm/linux.git/
255 * -----------here^
256 * so memcpy(dst, base, serverlen) will
257 * copy up to "...git.host".
258 */
259 const char *colon_ss = strstr(base,"://");
260 if (colon_ss) {
261 serverlen = (strchr(colon_ss + 3, '/')
262 - base);
263 okay = 1;
264 }
1b0c1e67 265 } else if (!memcmp(data + i, "../", 3)) {
4c42aa1a
TRC
266 /*
267 * Relative URL; chop the corresponding
5df1e0d0
JH
268 * number of subpath from base (and ../
269 * from data), and concatenate the result.
270 *
271 * The code first drops ../ from data, and
272 * then drops one ../ from data and one path
273 * from base. IOW, one extra ../ is dropped
274 * from data than path is dropped from base.
275 *
276 * This is not wrong. The alternate in
277 * http://git.host/pub/scm/linux.git/
278 * to borrow from
279 * http://git.host/pub/scm/linus.git/
280 * is ../../linus.git/objects/. You need
281 * two ../../ to borrow from your direct
282 * neighbour.
283 */
1b0c1e67
DB
284 i += 3;
285 serverlen = strlen(base);
8fcf7f9a 286 while (i + 2 < posn &&
1b0c1e67
DB
287 !memcmp(data + i, "../", 3)) {
288 do {
289 serverlen--;
290 } while (serverlen &&
291 base[serverlen - 1] != '/');
292 i += 3;
293 }
a9486b02 294 /* If the server got removed, give up. */
8fcf7f9a 295 okay = strchr(base, ':') - base + 3 <
4c42aa1a 296 serverlen;
acc075a8 297 } else if (alt_req->http_specific) {
1b0c1e67
DB
298 char *colon = strchr(data + i, ':');
299 char *slash = strchr(data + i, '/');
300 if (colon && slash && colon < data + posn &&
301 slash < data + posn && colon < slash) {
302 okay = 1;
303 }
304 }
1b0c1e67 305 if (okay) {
59b8263a
RS
306 struct strbuf target = STRBUF_INIT;
307 strbuf_add(&target, base, serverlen);
d61434ae
JK
308 strbuf_add(&target, data + i, posn - i);
309 if (!strbuf_strip_suffix(&target, "objects")) {
310 warning("ignoring alternate that does"
311 " not end in 'objects': %s",
312 target.buf);
313 strbuf_release(&target);
314 } else if (is_alternate_allowed(target.buf)) {
abcbdc03
JK
315 warning("adding alternate object store: %s",
316 target.buf);
317 newalt = xmalloc(sizeof(*newalt));
318 newalt->next = NULL;
319 newalt->base = strbuf_detach(&target, NULL);
320 newalt->got_indices = 0;
321 newalt->packs = NULL;
322
323 while (tail->next != NULL)
324 tail = tail->next;
325 tail->next = newalt;
5cae73d5
EW
326 } else {
327 strbuf_release(&target);
abcbdc03 328 }
b3661567
DB
329 }
330 }
331 i = posn + 1;
332 }
bc8f2652 333
30ae764b 334 cdata->got_alternates = 1;
acc075a8
NH
335}
336
30ae764b 337static void fetch_alternates(struct walker *walker, const char *base)
acc075a8 338{
028c2976 339 struct strbuf buffer = STRBUF_INIT;
54ba4c5f 340 struct strbuf url = STRBUF_INIT;
acc075a8 341 struct active_request_slot *slot;
cb754fdf 342 struct alternates_request alt_req;
30ae764b 343 struct walker_data *cdata = walker->data;
acc075a8 344
4c42aa1a
TRC
345 /*
346 * If another request has already started fetching alternates,
347 * wait for them to arrive and return to processing this request's
348 * curl message
349 */
29508e1e 350#ifdef USE_CURL_MULTI
30ae764b 351 while (cdata->got_alternates == 0) {
29508e1e 352 step_active_slots();
acc075a8 353 }
29508e1e 354#endif
acc075a8
NH
355
356 /* Nothing to do if they've already been fetched */
30ae764b 357 if (cdata->got_alternates == 1)
acc075a8
NH
358 return;
359
360 /* Start the fetch */
30ae764b 361 cdata->got_alternates = 0;
acc075a8 362
30ae764b 363 if (walker->get_verbosely)
acc075a8 364 fprintf(stderr, "Getting alternates list for %s\n", base);
8fcf7f9a 365
54ba4c5f 366 strbuf_addf(&url, "%s/objects/info/http-alternates", base);
acc075a8 367
4c42aa1a
TRC
368 /*
369 * Use a callback to process the result, since another request
370 * may fail and need to have alternates loaded before continuing
371 */
acc075a8 372 slot = get_active_slot();
e388ab74 373 slot->callback_func = process_alternates_response;
30ae764b 374 alt_req.walker = walker;
acc075a8
NH
375 slot->callback_data = &alt_req;
376
377 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
29508e1e 378 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
54ba4c5f 379 curl_easy_setopt(slot->curl, CURLOPT_URL, url.buf);
acc075a8
NH
380
381 alt_req.base = base;
54ba4c5f 382 alt_req.url = &url;
acc075a8
NH
383 alt_req.buffer = &buffer;
384 alt_req.http_specific = 1;
385 alt_req.slot = slot;
386
387 if (start_active_slot(slot))
388 run_active_slot(slot);
389 else
30ae764b 390 cdata->got_alternates = -1;
acc075a8 391
028c2976 392 strbuf_release(&buffer);
54ba4c5f 393 strbuf_release(&url);
b3661567
DB
394}
395
30ae764b 396static int fetch_indices(struct walker *walker, struct alt_base *repo)
182005b9 397{
b8caac2b 398 int ret;
1d389ab6 399
b3661567 400 if (repo->got_indices)
182005b9
DB
401 return 0;
402
30ae764b 403 if (walker->get_verbosely)
6fd72e39 404 fprintf(stderr, "Getting pack list for %s\n", repo->base);
8fcf7f9a 405
b8caac2b
TRC
406 switch (http_get_info_packs(repo->base, &repo->packs)) {
407 case HTTP_OK:
408 case HTTP_MISSING_TARGET:
409 repo->got_indices = 1;
410 ret = 0;
411 break;
412 default:
5e3a7691 413 repo->got_indices = 0;
b8caac2b 414 ret = -1;
b3661567 415 }
182005b9 416
3a462bc9 417 return ret;
182005b9
DB
418}
419
07c19e72 420static int http_fetch_pack(struct walker *walker, struct alt_base *repo, unsigned char *sha1)
182005b9 421{
182005b9 422 struct packed_git *target;
49a0f240 423 int ret;
cb754fdf 424 struct slot_results results;
2264dfa5 425 struct http_pack_request *preq;
182005b9 426
30ae764b 427 if (fetch_indices(walker, repo))
182005b9 428 return -1;
b3661567 429 target = find_sha1_pack(sha1, repo->packs);
182005b9 430 if (!target)
b3661567 431 return -1;
182005b9 432
30ae764b 433 if (walker->get_verbosely) {
182005b9
DB
434 fprintf(stderr, "Getting pack %s\n",
435 sha1_to_hex(target->sha1));
436 fprintf(stderr, " which contains %s\n",
437 sha1_to_hex(sha1));
438 }
439
2264dfa5
TRC
440 preq = new_http_pack_request(target, repo->base);
441 if (preq == NULL)
442 goto abort;
443 preq->lst = &repo->packs;
444 preq->slot->results = &results;
182005b9 445
2264dfa5
TRC
446 if (start_active_slot(preq->slot)) {
447 run_active_slot(preq->slot);
c8568e13 448 if (results.curl_result != CURLE_OK) {
2264dfa5
TRC
449 error("Unable to get pack file %s\n%s", preq->url,
450 curl_errorstr);
451 goto abort;
1d389ab6
NH
452 }
453 } else {
2264dfa5
TRC
454 error("Unable to start request");
455 goto abort;
182005b9
DB
456 }
457
2264dfa5
TRC
458 ret = finish_http_pack_request(preq);
459 release_http_pack_request(preq);
49a0f240 460 if (ret)
b721e01f 461 return ret;
49a0f240 462
182005b9 463 return 0;
2264dfa5
TRC
464
465abort:
466 return -1;
182005b9
DB
467}
468
53f31389
MW
469static void abort_object_request(struct object_request *obj_req)
470{
53f31389
MW
471 release_object_request(obj_req);
472}
473
43b8bba6 474static int fetch_object(struct walker *walker, unsigned char *sha1)
6eb7ed54
DB
475{
476 char *hex = sha1_to_hex(sha1);
29508e1e 477 int ret = 0;
94e99012 478 struct object_request *obj_req = NULL;
5424bc55 479 struct http_object_request *req;
94e99012 480 struct list_head *pos, *head = &object_queue_head;
1d389ab6 481
94e99012
EW
482 list_for_each(pos, head) {
483 obj_req = list_entry(pos, struct object_request, node);
484 if (!hashcmp(obj_req->sha1, sha1))
485 break;
486 }
e388ab74 487 if (obj_req == NULL)
1d389ab6
NH
488 return error("Couldn't find request for %s in the queue", hex);
489
e388ab74 490 if (has_sha1_file(obj_req->sha1)) {
5424bc55
TRC
491 if (obj_req->req != NULL)
492 abort_http_object_request(obj_req->req);
53f31389 493 abort_object_request(obj_req);
11f0dafe
NH
494 return 0;
495 }
496
a7a8d378 497#ifdef USE_CURL_MULTI
4c42aa1a 498 while (obj_req->state == WAITING)
29508e1e 499 step_active_slots();
a7a8d378 500#else
30ae764b 501 start_object_request(walker, obj_req);
a7a8d378 502#endif
6eb7ed54 503
5424bc55
TRC
504 /*
505 * obj_req->req might change when fetching alternates in the callback
506 * process_object_response; therefore, the "shortcut" variable, req,
507 * is used only after we're done with slots.
508 */
4c42aa1a 509 while (obj_req->state == ACTIVE)
5424bc55
TRC
510 run_active_slot(obj_req->req->slot);
511
512 req = obj_req->req;
4c42aa1a 513
5424bc55
TRC
514 if (req->localfile != -1) {
515 close(req->localfile);
516 req->localfile = -1;
313c4714 517 }
6eb7ed54 518
17966c0a
EW
519 /*
520 * we turned off CURLOPT_FAILONERROR to avoid losing a
521 * persistent connection and got CURLE_OK.
522 */
3680f16f 523 if (req->http_code >= 300 && req->curl_result == CURLE_OK &&
17966c0a 524 (starts_with(req->url, "http://") ||
3680f16f 525 starts_with(req->url, "https://"))) {
17966c0a 526 req->curl_result = CURLE_HTTP_RETURNED_ERROR;
3680f16f
JK
527 xsnprintf(req->errorstr, sizeof(req->errorstr),
528 "HTTP request failed");
529 }
17966c0a 530
e388ab74 531 if (obj_req->state == ABORTED) {
29508e1e 532 ret = error("Request for %s aborted", hex);
5424bc55
TRC
533 } else if (req->curl_result != CURLE_OK &&
534 req->http_code != 416) {
535 if (missing_target(req))
e2029eb9
PB
536 ret = -1; /* Be silent, it is probably in a pack. */
537 else
538 ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)",
5424bc55
TRC
539 req->errorstr, req->curl_result,
540 req->http_code, hex);
541 } else if (req->zret != Z_STREAM_END) {
30ae764b 542 walker->corrupt_object_found++;
5424bc55
TRC
543 ret = error("File %s (%s) corrupt", hex, req->url);
544 } else if (hashcmp(obj_req->sha1, req->real_sha1)) {
bd2afde8 545 ret = error("File %s has bad hash", hex);
5424bc55 546 } else if (req->rename < 0) {
7b934ec0 547 ret = error("unable to write sha1 filename %s",
0da8b2e7 548 sha1_file_name(req->sha1));
6eb7ed54 549 }
49a0f240 550
5424bc55 551 release_http_object_request(req);
e388ab74 552 release_object_request(obj_req);
29508e1e 553 return ret;
6eb7ed54
DB
554}
555
30ae764b 556static int fetch(struct walker *walker, unsigned char *sha1)
b3661567 557{
30ae764b
DB
558 struct walker_data *data = walker->data;
559 struct alt_base *altbase = data->alt;
1d389ab6 560
43b8bba6 561 if (!fetch_object(walker, sha1))
1d389ab6 562 return 0;
b3661567 563 while (altbase) {
07c19e72 564 if (!http_fetch_pack(walker, altbase, sha1))
b3661567 565 return 0;
30ae764b 566 fetch_alternates(walker, data->alt->base);
b3661567
DB
567 altbase = altbase->next;
568 }
bd2afde8 569 return error("Unable to find %s under %s", sha1_to_hex(sha1),
30ae764b 570 data->alt->base);
b3661567
DB
571}
572
c13b2633 573static int fetch_ref(struct walker *walker, struct ref *ref)
cd541a68 574{
30ae764b 575 struct walker_data *data = walker->data;
c13b2633 576 return http_fetch_ref(data->alt->base, ref);
cd541a68
DB
577}
578
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DB
579static void cleanup(struct walker *walker)
580{
09ae9aca
TRC
581 struct walker_data *data = walker->data;
582 struct alt_base *alt, *alt_next;
583
584 if (data) {
585 alt = data->alt;
586 while (alt) {
587 alt_next = alt->next;
588
589 free(alt->base);
590 free(alt);
591
592 alt = alt_next;
593 }
594 free(data);
595 walker->data = NULL;
596 }
30ae764b
DB
597}
598
888692b7 599struct walker *get_http_walker(const char *url)
6eb7ed54 600{
9c880b3e 601 char *s;
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DB
602 struct walker_data *data = xmalloc(sizeof(struct walker_data));
603 struct walker *walker = xmalloc(sizeof(struct walker));
6eb7ed54 604
30ae764b 605 data->alt = xmalloc(sizeof(*data->alt));
95244ae3 606 data->alt->base = xstrdup(url);
30ae764b 607 for (s = data->alt->base + strlen(data->alt->base) - 1; *s == '/'; --s)
9c880b3e 608 *s = 0;
6eb7ed54 609
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DB
610 data->alt->got_indices = 0;
611 data->alt->packs = NULL;
612 data->alt->next = NULL;
613 data->got_alternates = -1;
fc57b6aa 614
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DB
615 walker->corrupt_object_found = 0;
616 walker->fetch = fetch;
617 walker->fetch_ref = fetch_ref;
618 walker->prefetch = prefetch;
619 walker->cleanup = cleanup;
620 walker->data = data;
6eb7ed54 621
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DB
622#ifdef USE_CURL_MULTI
623 add_fill_function(walker, (int (*)(void *)) fill_active_slot);
624#endif
8e29f6a0 625
30ae764b 626 return walker;
6eb7ed54 627}