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[project/uclient.git] / uclient-http.c
1 /*
2 * uclient - ustream based protocol client library
3 *
4 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #include <stdio.h>
19 #include <ctype.h>
20 #include <unistd.h>
21 #include <stdint.h>
22
23 #include <libubox/ustream.h>
24 #include <libubox/ustream-ssl.h>
25 #include <libubox/usock.h>
26 #include <libubox/blobmsg.h>
27
28 #include "uclient.h"
29 #include "uclient-utils.h"
30 #include "uclient-backend.h"
31
32 enum auth_type {
33 AUTH_TYPE_UNKNOWN,
34 AUTH_TYPE_NONE,
35 AUTH_TYPE_BASIC,
36 AUTH_TYPE_DIGEST,
37 };
38
39 enum request_type {
40 REQ_GET,
41 REQ_HEAD,
42 REQ_POST,
43 REQ_PUT,
44 REQ_DELETE,
45 __REQ_MAX
46 };
47
48 enum http_state {
49 HTTP_STATE_INIT,
50 HTTP_STATE_HEADERS_SENT,
51 HTTP_STATE_REQUEST_DONE,
52 HTTP_STATE_RECV_HEADERS,
53 HTTP_STATE_RECV_DATA,
54 HTTP_STATE_ERROR,
55 };
56
57 static const char * const request_types[__REQ_MAX] = {
58 [REQ_GET] = "GET",
59 [REQ_HEAD] = "HEAD",
60 [REQ_POST] = "POST",
61 [REQ_PUT] = "PUT",
62 [REQ_DELETE] = "DELETE",
63 };
64
65 struct uclient_http {
66 struct uclient uc;
67
68 const struct ustream_ssl_ops *ssl_ops;
69 struct ustream_ssl_ctx *ssl_ctx;
70 struct ustream *us;
71
72 struct ustream_fd ufd;
73 struct ustream_ssl ussl;
74
75 struct uloop_timeout disconnect_t;
76
77 bool ssl_require_validation;
78 bool ssl;
79 bool eof;
80 bool connection_close;
81 bool disconnect;
82 enum request_type req_type;
83 enum http_state state;
84
85 enum auth_type auth_type;
86 char *auth_str;
87
88 long read_chunked;
89 long content_length;
90
91 uint32_t nc;
92
93 struct blob_buf headers;
94 struct blob_buf meta;
95 };
96
97 enum {
98 PREFIX_HTTP,
99 PREFIX_HTTPS,
100 __PREFIX_MAX,
101 };
102
103 static const char * const uclient_http_prefix[] = {
104 [PREFIX_HTTP] = "http://",
105 [PREFIX_HTTPS] = "https://",
106 [__PREFIX_MAX] = NULL
107 };
108
109 static int uclient_do_connect(struct uclient_http *uh, const char *port)
110 {
111 socklen_t sl;
112 int fd;
113
114 if (uh->uc.url->port)
115 port = uh->uc.url->port;
116
117 fd = usock(USOCK_TCP | USOCK_NONBLOCK, uh->uc.url->host, port);
118 if (fd < 0)
119 return -1;
120
121 ustream_fd_init(&uh->ufd, fd);
122
123 memset(&uh->uc.local_addr, 0, sizeof(uh->uc.local_addr));
124 memset(&uh->uc.remote_addr, 0, sizeof(uh->uc.remote_addr));
125
126 sl = sizeof(uh->uc.local_addr);
127 getsockname(fd, &uh->uc.local_addr.sa, &sl);
128 getpeername(fd, &uh->uc.remote_addr.sa, &sl);
129
130 return 0;
131 }
132
133 static void uclient_http_disconnect(struct uclient_http *uh)
134 {
135 uloop_timeout_cancel(&uh->disconnect_t);
136 if (!uh->us)
137 return;
138
139 if (uh->ssl)
140 ustream_free(&uh->ussl.stream);
141 ustream_free(&uh->ufd.stream);
142 close(uh->ufd.fd.fd);
143 uh->us = NULL;
144 }
145
146 static void uclient_http_free_url_state(struct uclient *cl)
147 {
148 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
149
150 uh->auth_type = AUTH_TYPE_UNKNOWN;
151 free(uh->auth_str);
152 uh->auth_str = NULL;
153 uclient_http_disconnect(uh);
154 }
155
156 static void uclient_http_error(struct uclient_http *uh, int code)
157 {
158 uh->state = HTTP_STATE_ERROR;
159 uh->us->eof = true;
160 ustream_state_change(uh->us);
161 uclient_backend_set_error(&uh->uc, code);
162 }
163
164 static void uclient_http_request_disconnect(struct uclient *cl)
165 {
166 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
167
168 if (!uh->us)
169 return;
170
171 uh->eof = true;
172 uh->disconnect = true;
173 uloop_timeout_set(&uh->disconnect_t, 1);
174 }
175
176 static void uclient_notify_eof(struct uclient_http *uh)
177 {
178 struct ustream *us = uh->us;
179
180 if (uh->disconnect)
181 return;
182
183 if (!uh->eof) {
184 if (!us->eof && !us->write_error)
185 return;
186
187 if (ustream_pending_data(us, false))
188 return;
189 }
190
191 uclient_backend_set_eof(&uh->uc);
192
193 if (uh->connection_close)
194 uclient_http_request_disconnect(&uh->uc);
195 }
196
197 static void uclient_http_reset_state(struct uclient_http *uh)
198 {
199 uclient_backend_reset_state(&uh->uc);
200 uh->read_chunked = -1;
201 uh->content_length = -1;
202 uh->eof = false;
203 uh->disconnect = false;
204 uh->connection_close = false;
205 uh->state = HTTP_STATE_INIT;
206
207 if (uh->auth_type == AUTH_TYPE_UNKNOWN && !uh->uc.url->auth)
208 uh->auth_type = AUTH_TYPE_NONE;
209 }
210
211 static void uclient_http_init_request(struct uclient_http *uh)
212 {
213 uclient_http_reset_state(uh);
214 blob_buf_init(&uh->meta, 0);
215 }
216
217 static enum auth_type
218 uclient_http_update_auth_type(struct uclient_http *uh)
219 {
220 if (!uh->auth_str)
221 return AUTH_TYPE_NONE;
222
223 if (!strncasecmp(uh->auth_str, "basic", 5))
224 return AUTH_TYPE_BASIC;
225
226 if (!strncasecmp(uh->auth_str, "digest", 6))
227 return AUTH_TYPE_DIGEST;
228
229 return AUTH_TYPE_NONE;
230 }
231
232 static void uclient_http_process_headers(struct uclient_http *uh)
233 {
234 enum {
235 HTTP_HDR_TRANSFER_ENCODING,
236 HTTP_HDR_CONNECTION,
237 HTTP_HDR_CONTENT_LENGTH,
238 HTTP_HDR_AUTH,
239 __HTTP_HDR_MAX,
240 };
241 static const struct blobmsg_policy hdr_policy[__HTTP_HDR_MAX] = {
242 #define hdr(_name) { .name = _name, .type = BLOBMSG_TYPE_STRING }
243 [HTTP_HDR_TRANSFER_ENCODING] = hdr("transfer-encoding"),
244 [HTTP_HDR_CONNECTION] = hdr("connection"),
245 [HTTP_HDR_CONTENT_LENGTH] = hdr("content-length"),
246 [HTTP_HDR_AUTH] = hdr("www-authenticate"),
247 #undef hdr
248 };
249 struct blob_attr *tb[__HTTP_HDR_MAX];
250 struct blob_attr *cur;
251
252 blobmsg_parse(hdr_policy, __HTTP_HDR_MAX, tb, blob_data(uh->meta.head), blob_len(uh->meta.head));
253
254 cur = tb[HTTP_HDR_TRANSFER_ENCODING];
255 if (cur && strstr(blobmsg_data(cur), "chunked"))
256 uh->read_chunked = 0;
257
258 cur = tb[HTTP_HDR_CONNECTION];
259 if (cur && strstr(blobmsg_data(cur), "close"))
260 uh->connection_close = true;
261
262 cur = tb[HTTP_HDR_CONTENT_LENGTH];
263 if (cur)
264 uh->content_length = strtoul(blobmsg_data(cur), NULL, 10);
265
266 cur = tb[HTTP_HDR_AUTH];
267 if (cur) {
268 free(uh->auth_str);
269 uh->auth_str = strdup(blobmsg_data(cur));
270 }
271
272 uh->auth_type = uclient_http_update_auth_type(uh);
273 }
274
275 static void
276 uclient_http_add_auth_basic(struct uclient_http *uh)
277 {
278 struct uclient_url *url = uh->uc.url;
279 int auth_len = strlen(url->auth);
280 char *auth_buf;
281
282 if (auth_len > 512)
283 return;
284
285 auth_buf = alloca(base64_len(auth_len) + 1);
286 base64_encode(url->auth, auth_len, auth_buf);
287 ustream_printf(uh->us, "Authorization: Basic %s\r\n", auth_buf);
288 }
289
290 static char *digest_unquote_sep(char **str)
291 {
292 char *cur = *str + 1;
293 char *start = cur;
294 char *out;
295
296 if (**str != '"')
297 return NULL;
298
299 out = cur;
300 while (1) {
301 if (!*cur)
302 return NULL;
303
304 if (*cur == '"') {
305 cur++;
306 break;
307 }
308
309 if (*cur == '\\')
310 cur++;
311
312 *(out++) = *(cur++);
313 }
314
315 if (*cur == ',')
316 cur++;
317
318 *out = 0;
319 *str = cur;
320
321 return start;
322 }
323
324 static char *digest_sep(char **str)
325 {
326 char *cur, *next;
327
328 cur = *str;
329 next = strchr(*str, ',');
330 if (next) {
331 *str = next + 1;
332 *next = 0;
333 } else {
334 *str += strlen(*str);
335 }
336
337 return cur;
338 }
339
340 static bool strmatch(char **str, const char *prefix)
341 {
342 int len = strlen(prefix);
343
344 if (strncmp(*str, prefix, len) != 0 || (*str)[len] != '=')
345 return false;
346
347 *str += len + 1;
348 return true;
349 }
350
351 static void
352 get_cnonce(char *dest)
353 {
354 uint32_t val = 0;
355 FILE *f;
356
357 f = fopen("/dev/urandom", "r");
358 if (f) {
359 fread(&val, sizeof(val), 1, f);
360 fclose(f);
361 }
362
363 bin_to_hex(dest, &val, sizeof(val));
364 }
365
366 static void add_field(char **buf, int *ofs, int *len, const char *name, const char *val)
367 {
368 int available = *len - *ofs;
369 int required;
370 const char *next;
371 char *cur;
372
373 if (*len && !*buf)
374 return;
375
376 required = strlen(name) + 4 + strlen(val) * 2;
377 if (required > available)
378 *len += required - available + 64;
379
380 *buf = realloc(*buf, *len);
381 if (!*buf)
382 return;
383
384 cur = *buf + *ofs;
385 cur += sprintf(cur, ", %s=\"", name);
386
387 while ((next = strchr(val, '"'))) {
388 if (next > val) {
389 memcpy(cur, val, next - val);
390 cur += next - val;
391 }
392
393 cur += sprintf(cur, "\\\"");
394 val = next + 1;
395 }
396
397 cur += sprintf(cur, "%s\"", val);
398 *ofs = cur - *buf;
399 }
400
401 static void
402 uclient_http_add_auth_digest(struct uclient_http *uh)
403 {
404 struct uclient_url *url = uh->uc.url;
405 const char *realm = NULL, *opaque = NULL;
406 const char *user, *password;
407 char *buf, *next;
408 int len, ofs;
409
410 char cnonce_str[9];
411 char nc_str[9];
412 char ahash[33];
413 char hash[33];
414
415 struct http_digest_data data = {
416 .nc = nc_str,
417 .cnonce = cnonce_str,
418 .auth_hash = ahash,
419 };
420
421 len = strlen(uh->auth_str) + 1;
422 if (len > 512)
423 return;
424
425 buf = alloca(len);
426 strcpy(buf, uh->auth_str);
427
428 /* skip auth type */
429 strsep(&buf, " ");
430
431 next = buf;
432 while (*next) {
433 const char **dest = NULL;
434 const char *tmp;
435
436 while (*next && isspace(*next))
437 next++;
438
439 if (strmatch(&next, "realm"))
440 dest = &realm;
441 else if (strmatch(&next, "qop"))
442 dest = &data.qop;
443 else if (strmatch(&next, "nonce"))
444 dest = &data.nonce;
445 else if (strmatch(&next, "opaque"))
446 dest = &opaque;
447 else if (strmatch(&next, "stale") ||
448 strmatch(&next, "algorithm") ||
449 strmatch(&next, "auth-param")) {
450 digest_sep(&next);
451 continue;
452 } else if (strmatch(&next, "domain") ||
453 strmatch(&next, "qop-options"))
454 dest = &tmp;
455 else {
456 digest_sep(&next);
457 continue;
458 }
459
460 *dest = digest_unquote_sep(&next);
461 }
462
463 if (!realm || !data.qop || !data.nonce)
464 return;
465
466 sprintf(nc_str, "%08x", uh->nc++);
467 get_cnonce(cnonce_str);
468
469 data.qop = "auth";
470 data.uri = url->location;
471 data.method = request_types[uh->req_type];
472
473 password = strchr(url->auth, ':');
474 if (password) {
475 char *user_buf;
476
477 len = password - url->auth;
478 if (len > 256)
479 return;
480
481 user_buf = alloca(len + 1);
482 strncpy(user_buf, url->auth, len);
483 user_buf[len] = 0;
484 user = user_buf;
485 password++;
486 } else {
487 user = url->auth;
488 password = "";
489 }
490
491 http_digest_calculate_auth_hash(ahash, user, realm, password);
492 http_digest_calculate_response(hash, &data);
493
494 buf = NULL;
495 len = 0;
496 ofs = 0;
497
498 add_field(&buf, &ofs, &len, "username", user);
499 add_field(&buf, &ofs, &len, "realm", realm);
500 add_field(&buf, &ofs, &len, "nonce", data.nonce);
501 add_field(&buf, &ofs, &len, "uri", data.uri);
502 add_field(&buf, &ofs, &len, "cnonce", data.cnonce);
503 add_field(&buf, &ofs, &len, "response", hash);
504 if (opaque)
505 add_field(&buf, &ofs, &len, "opaque", opaque);
506
507 ustream_printf(uh->us, "Authorization: Digest nc=%s, qop=%s%s\r\n", data.nc, data.qop, buf);
508 free(buf);
509 }
510
511 static void
512 uclient_http_add_auth_header(struct uclient_http *uh)
513 {
514 if (!uh->uc.url->auth)
515 return;
516
517 switch (uh->auth_type) {
518 case AUTH_TYPE_UNKNOWN:
519 case AUTH_TYPE_NONE:
520 break;
521 case AUTH_TYPE_BASIC:
522 uclient_http_add_auth_basic(uh);
523 break;
524 case AUTH_TYPE_DIGEST:
525 uclient_http_add_auth_digest(uh);
526 break;
527 }
528 }
529
530 static void
531 uclient_http_send_headers(struct uclient_http *uh)
532 {
533 struct uclient_url *url = uh->uc.url;
534 struct blob_attr *cur;
535 enum request_type req_type = uh->req_type;
536 int rem;
537
538 if (uh->state >= HTTP_STATE_HEADERS_SENT)
539 return;
540
541 ustream_printf(uh->us,
542 "%s %s HTTP/1.1\r\n"
543 "Host: %s\r\n",
544 request_types[req_type],
545 url->location, url->host);
546
547 blobmsg_for_each_attr(cur, uh->headers.head, rem)
548 ustream_printf(uh->us, "%s: %s\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
549
550 if (uh->req_type == REQ_POST || uh->req_type == REQ_PUT)
551 ustream_printf(uh->us, "Transfer-Encoding: chunked\r\n");
552
553 uclient_http_add_auth_header(uh);
554
555 ustream_printf(uh->us, "\r\n");
556
557 uh->state = HTTP_STATE_HEADERS_SENT;
558 }
559
560 static void uclient_http_headers_complete(struct uclient_http *uh)
561 {
562 enum auth_type auth_type = uh->auth_type;
563
564 uh->state = HTTP_STATE_RECV_DATA;
565 uh->uc.meta = uh->meta.head;
566 uclient_http_process_headers(uh);
567
568 if (auth_type == AUTH_TYPE_UNKNOWN && uh->uc.status_code == 401 &&
569 (uh->req_type == REQ_HEAD || uh->req_type == REQ_GET)) {
570 uclient_http_init_request(uh);
571 uclient_http_send_headers(uh);
572 uh->state = HTTP_STATE_REQUEST_DONE;
573 return;
574 }
575
576 if (uh->uc.cb->header_done)
577 uh->uc.cb->header_done(&uh->uc);
578
579 if (uh->eof)
580 return;
581
582 if (uh->req_type == REQ_HEAD || uh->uc.status_code == 204) {
583 uh->eof = true;
584 uclient_notify_eof(uh);
585 }
586 }
587
588 static void uclient_parse_http_line(struct uclient_http *uh, char *data)
589 {
590 char *name;
591 char *sep;
592
593 if (uh->state == HTTP_STATE_REQUEST_DONE) {
594 char *code;
595
596 if (!strlen(data))
597 return;
598
599 /* HTTP/1.1 */
600 strsep(&data, " ");
601
602 code = strsep(&data, " ");
603 if (!code)
604 goto error;
605
606 uh->uc.status_code = strtoul(code, &sep, 10);
607 if (sep && *sep)
608 goto error;
609
610 uh->state = HTTP_STATE_RECV_HEADERS;
611 return;
612 }
613
614 if (!*data) {
615 uclient_http_headers_complete(uh);
616 return;
617 }
618
619 sep = strchr(data, ':');
620 if (!sep)
621 return;
622
623 *(sep++) = 0;
624
625 for (name = data; *name; name++)
626 *name = tolower(*name);
627
628 name = data;
629 while (isspace(*sep))
630 sep++;
631
632 blobmsg_add_string(&uh->meta, name, sep);
633 return;
634
635 error:
636 uh->uc.status_code = 400;
637 uh->eof = true;
638 uclient_notify_eof(uh);
639 }
640
641 static void __uclient_notify_read(struct uclient_http *uh)
642 {
643 struct uclient *uc = &uh->uc;
644 char *data;
645 int len;
646
647 if (uh->state < HTTP_STATE_REQUEST_DONE || uh->state == HTTP_STATE_ERROR)
648 return;
649
650 data = ustream_get_read_buf(uh->us, &len);
651 if (!data || !len)
652 return;
653
654 if (uh->state < HTTP_STATE_RECV_DATA) {
655 char *sep;
656 int cur_len;
657
658 do {
659 sep = strstr(data, "\r\n");
660 if (!sep)
661 break;
662
663 /* Check for multi-line HTTP headers */
664 if (sep > data) {
665 if (!sep[2])
666 return;
667
668 if (isspace(sep[2]) && sep[2] != '\r') {
669 sep[0] = ' ';
670 sep[1] = ' ';
671 continue;
672 }
673 }
674
675 *sep = 0;
676 cur_len = sep + 2 - data;
677 uclient_parse_http_line(uh, data);
678 ustream_consume(uh->us, cur_len);
679 len -= cur_len;
680
681 if (uh->eof)
682 return;
683
684 data = ustream_get_read_buf(uh->us, &len);
685 } while (data && uh->state < HTTP_STATE_RECV_DATA);
686
687 if (!len)
688 return;
689 }
690
691 if (uh->eof)
692 return;
693
694 if (uh->state == HTTP_STATE_RECV_DATA) {
695 /* Now it's uclient user turn to read some data */
696 uloop_timeout_cancel(&uc->connection_timeout);
697
698 if (uc->cb->data_read)
699 uc->cb->data_read(uc);
700 }
701 }
702
703 static void __uclient_notify_write(struct uclient_http *uh)
704 {
705 struct uclient *uc = &uh->uc;
706
707 if (uc->cb->data_sent)
708 uc->cb->data_sent(uc);
709 }
710
711 static void uclient_notify_read(struct ustream *us, int bytes)
712 {
713 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
714
715 __uclient_notify_read(uh);
716 }
717
718 static void uclient_notify_write(struct ustream *us, int bytes)
719 {
720 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
721
722 __uclient_notify_write(uh);
723 }
724
725 static void uclient_notify_state(struct ustream *us)
726 {
727 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
728
729 uclient_notify_eof(uh);
730 }
731
732 static int uclient_setup_http(struct uclient_http *uh)
733 {
734 struct ustream *us = &uh->ufd.stream;
735 int ret;
736
737 uh->us = us;
738 uh->ssl = false;
739
740 us->string_data = true;
741 us->notify_state = uclient_notify_state;
742 us->notify_read = uclient_notify_read;
743 us->notify_write = uclient_notify_write;
744
745 ret = uclient_do_connect(uh, "80");
746 if (ret)
747 return UCLIENT_ERROR_CONNECT;
748
749 return 0;
750 }
751
752 static void uclient_ssl_notify_read(struct ustream *us, int bytes)
753 {
754 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
755
756 __uclient_notify_read(uh);
757 }
758
759 static void uclient_ssl_notify_write(struct ustream *us, int bytes)
760 {
761 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
762
763 __uclient_notify_write(uh);
764 }
765
766 static void uclient_ssl_notify_state(struct ustream *us)
767 {
768 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
769
770 uclient_notify_eof(uh);
771 }
772
773 static void uclient_ssl_notify_error(struct ustream_ssl *ssl, int error, const char *str)
774 {
775 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
776
777 uclient_http_error(uh, UCLIENT_ERROR_CONNECT);
778 }
779
780 static void uclient_ssl_notify_verify_error(struct ustream_ssl *ssl, int error, const char *str)
781 {
782 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
783
784 if (!uh->ssl_require_validation)
785 return;
786
787 uclient_http_error(uh, UCLIENT_ERROR_SSL_INVALID_CERT);
788 }
789
790 static void uclient_ssl_notify_connected(struct ustream_ssl *ssl)
791 {
792 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
793
794 if (!uh->ssl_require_validation)
795 return;
796
797 if (!uh->ussl.valid_cn)
798 uclient_http_error(uh, UCLIENT_ERROR_SSL_CN_MISMATCH);
799 }
800
801 static int uclient_setup_https(struct uclient_http *uh)
802 {
803 struct ustream *us = &uh->ussl.stream;
804 int ret;
805
806 uh->ssl = true;
807 uh->us = us;
808
809 if (!uh->ssl_ctx)
810 return UCLIENT_ERROR_MISSING_SSL_CONTEXT;
811
812 ret = uclient_do_connect(uh, "443");
813 if (ret)
814 return UCLIENT_ERROR_CONNECT;
815
816 us->string_data = true;
817 us->notify_state = uclient_ssl_notify_state;
818 us->notify_read = uclient_ssl_notify_read;
819 us->notify_write = uclient_ssl_notify_write;
820 uh->ussl.notify_error = uclient_ssl_notify_error;
821 uh->ussl.notify_verify_error = uclient_ssl_notify_verify_error;
822 uh->ussl.notify_connected = uclient_ssl_notify_connected;
823 uh->ssl_ops->init(&uh->ussl, &uh->ufd.stream, uh->ssl_ctx, false);
824 uh->ssl_ops->set_peer_cn(&uh->ussl, uh->uc.url->host);
825
826 return 0;
827 }
828
829 static int uclient_http_connect(struct uclient *cl)
830 {
831 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
832 int ret;
833
834 if (!cl->eof || uh->disconnect)
835 uclient_http_disconnect(uh);
836
837 uclient_http_init_request(uh);
838
839 if (uh->us)
840 return 0;
841
842 uh->ssl = cl->url->prefix == PREFIX_HTTPS;
843
844 if (uh->ssl)
845 ret = uclient_setup_https(uh);
846 else
847 ret = uclient_setup_http(uh);
848
849 return ret;
850 }
851
852 static void uclient_http_disconnect_cb(struct uloop_timeout *timeout)
853 {
854 struct uclient_http *uh = container_of(timeout, struct uclient_http, disconnect_t);
855
856 uclient_http_disconnect(uh);
857 }
858
859 static struct uclient *uclient_http_alloc(void)
860 {
861 struct uclient_http *uh;
862
863 uh = calloc_a(sizeof(*uh));
864 uh->disconnect_t.cb = uclient_http_disconnect_cb;
865 blob_buf_init(&uh->headers, 0);
866
867 return &uh->uc;
868 }
869
870 static void uclient_http_free_ssl_ctx(struct uclient_http *uh)
871 {
872 uh->ssl_ops = NULL;
873 uh->ssl_ctx = NULL;
874 }
875
876 static void uclient_http_free(struct uclient *cl)
877 {
878 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
879
880 uclient_http_free_url_state(cl);
881 uclient_http_free_ssl_ctx(uh);
882 blob_buf_free(&uh->headers);
883 blob_buf_free(&uh->meta);
884 free(uh);
885 }
886
887 int
888 uclient_http_set_request_type(struct uclient *cl, const char *type)
889 {
890 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
891 int i;
892
893 if (cl->backend != &uclient_backend_http)
894 return -1;
895
896 if (uh->state > HTTP_STATE_INIT)
897 return -1;
898
899 for (i = 0; i < ARRAY_SIZE(request_types); i++) {
900 if (strcmp(request_types[i], type) != 0)
901 continue;
902
903 uh->req_type = i;
904 return 0;
905 }
906
907 return -1;
908 }
909
910 int
911 uclient_http_reset_headers(struct uclient *cl)
912 {
913 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
914
915 blob_buf_init(&uh->headers, 0);
916
917 return 0;
918 }
919
920 int
921 uclient_http_set_header(struct uclient *cl, const char *name, const char *value)
922 {
923 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
924
925 if (cl->backend != &uclient_backend_http)
926 return -1;
927
928 if (uh->state > HTTP_STATE_INIT)
929 return -1;
930
931 blobmsg_add_string(&uh->headers, name, value);
932 return 0;
933 }
934
935 static int
936 uclient_http_send_data(struct uclient *cl, const char *buf, unsigned int len)
937 {
938 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
939
940 if (uh->state >= HTTP_STATE_REQUEST_DONE)
941 return -1;
942
943 uclient_http_send_headers(uh);
944
945 if (len > 0) {
946 ustream_printf(uh->us, "%X\r\n", len);
947 ustream_write(uh->us, buf, len, false);
948 ustream_printf(uh->us, "\r\n");
949 }
950
951 return len;
952 }
953
954 static int
955 uclient_http_request_done(struct uclient *cl)
956 {
957 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
958
959 if (uh->state >= HTTP_STATE_REQUEST_DONE)
960 return -1;
961
962 uclient_http_send_headers(uh);
963 if (uh->req_type == REQ_POST || uh->req_type == REQ_PUT)
964 ustream_printf(uh->us, "0\r\n\r\n");
965 uh->state = HTTP_STATE_REQUEST_DONE;
966
967 return 0;
968 }
969
970 static int
971 uclient_http_read(struct uclient *cl, char *buf, unsigned int len)
972 {
973 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
974 int read_len = 0;
975 char *data, *data_end;
976
977 if (uh->state < HTTP_STATE_RECV_DATA || !uh->us)
978 return 0;
979
980 data = ustream_get_read_buf(uh->us, &read_len);
981 if (!data || !read_len)
982 return 0;
983
984 data_end = data + read_len;
985 read_len = 0;
986
987 if (uh->read_chunked == 0) {
988 char *sep;
989
990 if (data[0] == '\r' && data[1] == '\n') {
991 data += 2;
992 read_len += 2;
993 }
994
995 sep = strstr(data, "\r\n");
996 if (!sep)
997 return 0;
998
999 *sep = 0;
1000 uh->read_chunked = strtoul(data, NULL, 16);
1001
1002 read_len += sep + 2 - data;
1003 data = sep + 2;
1004
1005 if (!uh->read_chunked) {
1006 uh->eof = true;
1007 uh->uc.data_eof = true;
1008 }
1009 }
1010
1011 if (len > data_end - data)
1012 len = data_end - data;
1013
1014 if (uh->read_chunked >= 0) {
1015 if (len > uh->read_chunked)
1016 len = uh->read_chunked;
1017
1018 uh->read_chunked -= len;
1019 } else if (uh->content_length >= 0) {
1020 if (len > uh->content_length)
1021 len = uh->content_length;
1022
1023 uh->content_length -= len;
1024 if (!uh->content_length) {
1025 uh->eof = true;
1026 uh->uc.data_eof = true;
1027 }
1028 }
1029
1030 if (len > 0) {
1031 read_len += len;
1032 memcpy(buf, data, len);
1033 }
1034
1035 if (read_len > 0)
1036 ustream_consume(uh->us, read_len);
1037
1038 uclient_notify_eof(uh);
1039
1040 /* Now that we consumed something and if this isn't EOF, start timer again */
1041 if (!uh->uc.eof && !cl->connection_timeout.pending)
1042 uloop_timeout_set(&cl->connection_timeout, cl->timeout_msecs);
1043
1044 return len;
1045 }
1046
1047 bool uclient_http_redirect(struct uclient *cl)
1048 {
1049 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1050 struct blobmsg_policy location = {
1051 .name = "location",
1052 .type = BLOBMSG_TYPE_STRING,
1053 };
1054 struct uclient_url *url = cl->url;
1055 struct blob_attr *tb;
1056
1057 if (cl->backend != &uclient_backend_http)
1058 return false;
1059
1060 switch (cl->status_code) {
1061 case 301:
1062 case 302:
1063 case 307:
1064 break;
1065 default:
1066 return false;
1067 }
1068
1069 blobmsg_parse(&location, 1, &tb, blob_data(uh->meta.head), blob_len(uh->meta.head));
1070 if (!tb)
1071 return false;
1072
1073 url = uclient_get_url(blobmsg_data(tb), url->auth);
1074 if (!url)
1075 return false;
1076
1077 free(cl->url);
1078 cl->url = url;
1079 uclient_http_connect(cl);
1080 uclient_http_request_done(cl);
1081
1082 return true;
1083 }
1084
1085 int uclient_http_set_ssl_ctx(struct uclient *cl, const struct ustream_ssl_ops *ops,
1086 struct ustream_ssl_ctx *ctx, bool require_validation)
1087 {
1088 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1089
1090 if (cl->backend != &uclient_backend_http)
1091 return -1;
1092
1093 uclient_http_free_url_state(cl);
1094
1095 uclient_http_free_ssl_ctx(uh);
1096 uh->ssl_ops = ops;
1097 uh->ssl_ctx = ctx;
1098 uh->ssl_require_validation = !!ctx && require_validation;
1099
1100 return 0;
1101 }
1102
1103 const struct uclient_backend uclient_backend_http = {
1104 .prefix = uclient_http_prefix,
1105
1106 .alloc = uclient_http_alloc,
1107 .free = uclient_http_free,
1108 .connect = uclient_http_connect,
1109 .disconnect = uclient_http_request_disconnect,
1110 .update_url = uclient_http_free_url_state,
1111
1112 .read = uclient_http_read,
1113 .write = uclient_http_send_data,
1114 .request = uclient_http_request_done,
1115 };
libubox HTTP client library