Fix extra compiler warnings
[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 <sys/socket.h>
19 #include <stdio.h>
20 #include <ctype.h>
21 #include <unistd.h>
22 #include <stdint.h>
23 #include <string.h>
24 #include <fcntl.h>
25
26 #include <libubox/ustream.h>
27 #include <libubox/ustream-ssl.h>
28 #include <libubox/usock.h>
29 #include <libubox/blobmsg.h>
30
31 #include "uclient.h"
32 #include "uclient-utils.h"
33 #include "uclient-backend.h"
34
35 enum auth_type {
36 AUTH_TYPE_UNKNOWN,
37 AUTH_TYPE_NONE,
38 AUTH_TYPE_BASIC,
39 AUTH_TYPE_DIGEST,
40 };
41
42 enum request_type {
43 REQ_GET,
44 REQ_HEAD,
45 REQ_POST,
46 REQ_PUT,
47 REQ_DELETE,
48 __REQ_MAX
49 };
50
51 enum http_state {
52 HTTP_STATE_INIT,
53 HTTP_STATE_HEADERS_SENT,
54 HTTP_STATE_REQUEST_DONE,
55 HTTP_STATE_RECV_HEADERS,
56 HTTP_STATE_RECV_DATA,
57 HTTP_STATE_ERROR,
58 };
59
60 static const char * const request_types[__REQ_MAX] = {
61 [REQ_GET] = "GET",
62 [REQ_HEAD] = "HEAD",
63 [REQ_POST] = "POST",
64 [REQ_PUT] = "PUT",
65 [REQ_DELETE] = "DELETE",
66 };
67
68 struct uclient_http {
69 struct uclient uc;
70
71 const struct ustream_ssl_ops *ssl_ops;
72 struct ustream_ssl_ctx *ssl_ctx;
73 struct ustream *us;
74
75 struct ustream_fd ufd;
76 struct ustream_ssl ussl;
77
78 struct uloop_timeout disconnect_t;
79 unsigned int seq;
80
81 bool ssl_require_validation;
82 bool ssl;
83 bool eof;
84 bool connection_close;
85 bool disconnect;
86 enum request_type req_type;
87 enum http_state state;
88
89 enum auth_type auth_type;
90 char *auth_str;
91
92 long read_chunked;
93 long content_length;
94
95 int usock_flags;
96
97 uint32_t nc;
98
99 struct blob_buf headers;
100 struct blob_buf meta;
101 };
102
103 enum {
104 PREFIX_HTTP,
105 PREFIX_HTTPS,
106 __PREFIX_MAX,
107 };
108
109 static const char * const uclient_http_prefix[] = {
110 [PREFIX_HTTP] = "http://",
111 [PREFIX_HTTPS] = "https://",
112 [__PREFIX_MAX] = NULL
113 };
114
115 static int uclient_http_connect(struct uclient *cl);
116
117 static int uclient_do_connect(struct uclient_http *uh, const char *port)
118 {
119 socklen_t sl;
120 int fd;
121
122 if (uh->uc.url->port)
123 port = uh->uc.url->port;
124
125 memset(&uh->uc.remote_addr, 0, sizeof(uh->uc.remote_addr));
126
127 fd = usock_inet_timeout(USOCK_TCP | USOCK_NONBLOCK | uh->usock_flags,
128 uh->uc.url->host, port, &uh->uc.remote_addr,
129 uh->uc.timeout_msecs);
130 if (fd < 0)
131 return -1;
132
133 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
134 ustream_fd_init(&uh->ufd, fd);
135
136 sl = sizeof(uh->uc.local_addr);
137 memset(&uh->uc.local_addr, 0, sl);
138 getsockname(fd, &uh->uc.local_addr.sa, &sl);
139
140 return 0;
141 }
142
143 static void uclient_http_disconnect(struct uclient_http *uh)
144 {
145 uloop_timeout_cancel(&uh->disconnect_t);
146 if (!uh->us)
147 return;
148
149 if (uh->ssl)
150 ustream_free(&uh->ussl.stream);
151 ustream_free(&uh->ufd.stream);
152 if(uh->ufd.fd.fd)
153 close(uh->ufd.fd.fd);
154 uh->us = NULL;
155 }
156
157 static void uclient_http_free_url_state(struct uclient *cl)
158 {
159 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
160
161 uh->auth_type = AUTH_TYPE_UNKNOWN;
162 free(uh->auth_str);
163 uh->auth_str = NULL;
164 uclient_http_disconnect(uh);
165 }
166
167 static void uclient_http_error(struct uclient_http *uh, int code)
168 {
169 uh->state = HTTP_STATE_ERROR;
170 uh->us->eof = true;
171 ustream_state_change(uh->us);
172 uclient_backend_set_error(&uh->uc, code);
173 }
174
175 static void uclient_http_request_disconnect(struct uclient *cl)
176 {
177 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
178
179 if (!uh->us)
180 return;
181
182 uh->eof = true;
183 uh->disconnect = true;
184 uloop_timeout_set(&uh->disconnect_t, 1);
185 }
186
187 static void uclient_notify_eof(struct uclient_http *uh)
188 {
189 struct ustream *us = uh->us;
190
191 if (uh->disconnect)
192 return;
193
194 if (!uh->eof) {
195 if (!us->eof && !us->write_error)
196 return;
197
198 if (ustream_pending_data(us, false))
199 return;
200 }
201
202 if ((uh->content_length < 0 && uh->read_chunked >= 0) ||
203 uh->content_length == 0)
204 uh->uc.data_eof = true;
205
206 uclient_backend_set_eof(&uh->uc);
207
208 if (uh->connection_close)
209 uclient_http_request_disconnect(&uh->uc);
210 }
211
212 static void uclient_http_reset_state(struct uclient_http *uh)
213 {
214 uh->seq++;
215 uclient_backend_reset_state(&uh->uc);
216 uh->read_chunked = -1;
217 uh->content_length = -1;
218 uh->eof = false;
219 uh->disconnect = false;
220 uh->connection_close = false;
221 uh->state = HTTP_STATE_INIT;
222
223 if (uh->auth_type == AUTH_TYPE_UNKNOWN && !uh->uc.url->auth)
224 uh->auth_type = AUTH_TYPE_NONE;
225 }
226
227 static void uclient_http_init_request(struct uclient_http *uh)
228 {
229 uh->seq++;
230 uclient_http_reset_state(uh);
231 blob_buf_init(&uh->meta, 0);
232 }
233
234 static enum auth_type
235 uclient_http_update_auth_type(struct uclient_http *uh)
236 {
237 if (!uh->auth_str)
238 return AUTH_TYPE_NONE;
239
240 if (!strncasecmp(uh->auth_str, "basic", 5))
241 return AUTH_TYPE_BASIC;
242
243 if (!strncasecmp(uh->auth_str, "digest", 6))
244 return AUTH_TYPE_DIGEST;
245
246 return AUTH_TYPE_NONE;
247 }
248
249 static void uclient_http_process_headers(struct uclient_http *uh)
250 {
251 enum {
252 HTTP_HDR_TRANSFER_ENCODING,
253 HTTP_HDR_CONNECTION,
254 HTTP_HDR_CONTENT_LENGTH,
255 HTTP_HDR_AUTH,
256 __HTTP_HDR_MAX,
257 };
258 static const struct blobmsg_policy hdr_policy[__HTTP_HDR_MAX] = {
259 #define hdr(_name) { .name = _name, .type = BLOBMSG_TYPE_STRING }
260 [HTTP_HDR_TRANSFER_ENCODING] = hdr("transfer-encoding"),
261 [HTTP_HDR_CONNECTION] = hdr("connection"),
262 [HTTP_HDR_CONTENT_LENGTH] = hdr("content-length"),
263 [HTTP_HDR_AUTH] = hdr("www-authenticate"),
264 #undef hdr
265 };
266 struct blob_attr *tb[__HTTP_HDR_MAX];
267 struct blob_attr *cur;
268
269 blobmsg_parse(hdr_policy, __HTTP_HDR_MAX, tb, blob_data(uh->meta.head), blob_len(uh->meta.head));
270
271 cur = tb[HTTP_HDR_TRANSFER_ENCODING];
272 if (cur && strstr(blobmsg_data(cur), "chunked"))
273 uh->read_chunked = 0;
274
275 cur = tb[HTTP_HDR_CONNECTION];
276 if (cur && strstr(blobmsg_data(cur), "close"))
277 uh->connection_close = true;
278
279 cur = tb[HTTP_HDR_CONTENT_LENGTH];
280 if (cur)
281 uh->content_length = strtoul(blobmsg_data(cur), NULL, 10);
282
283 cur = tb[HTTP_HDR_AUTH];
284 if (cur) {
285 free(uh->auth_str);
286 uh->auth_str = strdup(blobmsg_data(cur));
287 }
288
289 uh->auth_type = uclient_http_update_auth_type(uh);
290 }
291
292 static bool uclient_request_supports_body(enum request_type req_type)
293 {
294 switch (req_type) {
295 case REQ_POST:
296 case REQ_PUT:
297 case REQ_DELETE:
298 return true;
299 default:
300 return false;
301 }
302 }
303
304 static int
305 uclient_http_add_auth_basic(struct uclient_http *uh)
306 {
307 struct uclient_url *url = uh->uc.url;
308 int auth_len = strlen(url->auth);
309 char *auth_buf;
310
311 if (auth_len > 512)
312 return -EINVAL;
313
314 auth_buf = alloca(base64_len(auth_len) + 1);
315 if (!auth_buf)
316 return -ENOMEM;
317
318 base64_encode(url->auth, auth_len, auth_buf);
319 ustream_printf(uh->us, "Authorization: Basic %s\r\n", auth_buf);
320
321 return 0;
322 }
323
324 static char *digest_unquote_sep(char **str)
325 {
326 char *cur = *str + 1;
327 char *start = cur;
328 char *out;
329
330 if (**str != '"')
331 return NULL;
332
333 out = cur;
334 while (1) {
335 if (!*cur)
336 return NULL;
337
338 if (*cur == '"') {
339 cur++;
340 break;
341 }
342
343 if (*cur == '\\')
344 cur++;
345
346 *(out++) = *(cur++);
347 }
348
349 if (*cur == ',')
350 cur++;
351
352 *out = 0;
353 *str = cur;
354
355 return start;
356 }
357
358 static char *digest_sep(char **str)
359 {
360 char *cur, *next;
361
362 cur = *str;
363 next = strchr(*str, ',');
364 if (next) {
365 *str = next + 1;
366 *next = 0;
367 } else {
368 *str += strlen(*str);
369 }
370
371 return cur;
372 }
373
374 static bool strmatch(char **str, const char *prefix)
375 {
376 int len = strlen(prefix);
377
378 if (strncmp(*str, prefix, len) != 0 || (*str)[len] != '=')
379 return false;
380
381 *str += len + 1;
382 return true;
383 }
384
385 static void
386 get_cnonce(char *dest)
387 {
388 uint32_t val = 0;
389 FILE *f;
390 size_t n;
391
392 f = fopen("/dev/urandom", "r");
393 if (f) {
394 n = fread(&val, sizeof(val), 1, f);
395 fclose(f);
396 if (n != 1)
397 return;
398 }
399
400 bin_to_hex(dest, &val, sizeof(val));
401 }
402
403 static void add_field(char **buf, int *ofs, int *len, const char *name, const char *val)
404 {
405 int available = *len - *ofs;
406 int required;
407 const char *next;
408 char *cur;
409
410 if (*len && !*buf)
411 return;
412
413 required = strlen(name) + 4 + strlen(val) * 2;
414 if (required > available)
415 *len += required - available + 64;
416
417 *buf = realloc(*buf, *len);
418 if (!*buf)
419 return;
420
421 cur = *buf + *ofs;
422 cur += sprintf(cur, ", %s=\"", name);
423
424 while ((next = strchr(val, '"'))) {
425 if (next > val) {
426 memcpy(cur, val, next - val);
427 cur += next - val;
428 }
429
430 cur += sprintf(cur, "\\\"");
431 val = next + 1;
432 }
433
434 cur += sprintf(cur, "%s\"", val);
435 *ofs = cur - *buf;
436 }
437
438 static int
439 uclient_http_add_auth_digest(struct uclient_http *uh)
440 {
441 struct uclient_url *url = uh->uc.url;
442 const char *realm = NULL, *opaque = NULL;
443 const char *user, *password;
444 char *buf, *next, *buf_orig;
445 int len, ofs;
446 int err = 0;
447
448 char cnonce_str[9];
449 char nc_str[9];
450 char ahash[33];
451 char hash[33];
452
453 struct http_digest_data data = {
454 .nc = nc_str,
455 .cnonce = cnonce_str,
456 .auth_hash = ahash,
457 };
458
459 len = strlen(uh->auth_str) + 1;
460 if (len > 512) {
461 err = -EINVAL;
462 goto fail;
463 }
464
465 buf = alloca(len);
466 if (!buf) {
467 err = -ENOMEM;
468 goto fail;
469 }
470
471 strcpy(buf, uh->auth_str);
472
473 /* skip auth type */
474 buf_orig = strsep(&buf, " ");
475
476 next = buf;
477 while (*next) {
478 const char **dest = NULL;
479 const char *tmp;
480
481 while (*next && isspace(*next))
482 next++;
483
484 if (strmatch(&next, "realm"))
485 dest = &realm;
486 else if (strmatch(&next, "qop"))
487 dest = &data.qop;
488 else if (strmatch(&next, "nonce"))
489 dest = &data.nonce;
490 else if (strmatch(&next, "opaque"))
491 dest = &opaque;
492 else if (strmatch(&next, "stale") ||
493 strmatch(&next, "algorithm") ||
494 strmatch(&next, "auth-param")) {
495 digest_sep(&next);
496 continue;
497 } else if (strmatch(&next, "domain") ||
498 strmatch(&next, "qop-options"))
499 dest = &tmp;
500 else {
501 digest_sep(&next);
502 continue;
503 }
504
505 *dest = digest_unquote_sep(&next);
506 }
507
508 if (!realm || !data.qop || !data.nonce) {
509 err = -EINVAL;
510 goto fail_buf;
511 }
512
513 sprintf(nc_str, "%08x", uh->nc++);
514 get_cnonce(cnonce_str);
515
516 data.qop = "auth";
517 data.uri = url->location;
518 data.method = request_types[uh->req_type];
519
520 password = strchr(url->auth, ':');
521 if (password) {
522 char *user_buf;
523
524 len = password - url->auth;
525 if (len > 256) {
526 err = -EINVAL;
527 goto fail_buf;
528 }
529
530 user_buf = alloca(len + 1);
531 if (!user_buf) {
532 err = -ENOMEM;
533 goto fail_buf;
534 }
535
536 strncpy(user_buf, url->auth, len);
537 user_buf[len] = 0;
538 user = user_buf;
539 password++;
540 } else {
541 user = url->auth;
542 password = "";
543 }
544
545 http_digest_calculate_auth_hash(ahash, user, realm, password);
546 http_digest_calculate_response(hash, &data);
547
548 buf = NULL;
549 len = 0;
550 ofs = 0;
551
552 add_field(&buf, &ofs, &len, "username", user);
553 add_field(&buf, &ofs, &len, "realm", realm);
554 add_field(&buf, &ofs, &len, "nonce", data.nonce);
555 add_field(&buf, &ofs, &len, "uri", data.uri);
556 add_field(&buf, &ofs, &len, "cnonce", data.cnonce);
557 add_field(&buf, &ofs, &len, "response", hash);
558 if (opaque)
559 add_field(&buf, &ofs, &len, "opaque", opaque);
560
561 ustream_printf(uh->us, "Authorization: Digest nc=%s, qop=%s%s\r\n", data.nc, data.qop, buf);
562
563 free(buf);
564
565 return 0;
566
567 fail_buf:
568 free(buf_orig);
569 fail:
570 return err;
571 }
572
573 static int
574 uclient_http_add_auth_header(struct uclient_http *uh)
575 {
576 if (!uh->uc.url->auth)
577 return 0;
578
579 switch (uh->auth_type) {
580 case AUTH_TYPE_UNKNOWN:
581 case AUTH_TYPE_NONE:
582 break;
583 case AUTH_TYPE_BASIC:
584 return uclient_http_add_auth_basic(uh);
585 case AUTH_TYPE_DIGEST:
586 return uclient_http_add_auth_digest(uh);
587 }
588
589 return 0;
590 }
591
592 static int
593 uclient_http_send_headers(struct uclient_http *uh)
594 {
595 struct uclient_url *url = uh->uc.url;
596 struct blob_attr *cur;
597 enum request_type req_type = uh->req_type;
598 bool literal_ipv6;
599 int err;
600 size_t rem;
601
602 if (uh->state >= HTTP_STATE_HEADERS_SENT)
603 return 0;
604
605 if (uh->uc.proxy_url)
606 url = uh->uc.proxy_url;
607
608 literal_ipv6 = strchr(url->host, ':');
609
610 ustream_printf(uh->us,
611 "%s %s HTTP/1.1\r\n"
612 "Host: %s%s%s%s%s\r\n",
613 request_types[req_type], url->location,
614 literal_ipv6 ? "[" : "",
615 url->host,
616 literal_ipv6 ? "]" : "",
617 url->port ? ":" : "",
618 url->port ? url->port : "");
619
620 blobmsg_for_each_attr(cur, uh->headers.head, rem)
621 ustream_printf(uh->us, "%s: %s\r\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
622
623 if (uclient_request_supports_body(uh->req_type))
624 ustream_printf(uh->us, "Transfer-Encoding: chunked\r\n");
625
626 err = uclient_http_add_auth_header(uh);
627 if (err)
628 return err;
629
630 ustream_printf(uh->us, "\r\n");
631
632 uh->state = HTTP_STATE_HEADERS_SENT;
633
634 return 0;
635 }
636
637 static void uclient_http_headers_complete(struct uclient_http *uh)
638 {
639 enum auth_type auth_type = uh->auth_type;
640 int seq = uh->uc.seq;
641
642 uh->state = HTTP_STATE_RECV_DATA;
643 uh->uc.meta = uh->meta.head;
644 uclient_http_process_headers(uh);
645
646 if (auth_type == AUTH_TYPE_UNKNOWN && uh->uc.status_code == 401 &&
647 (uh->req_type == REQ_HEAD || uh->req_type == REQ_GET)) {
648 uclient_http_connect(&uh->uc);
649 uclient_http_send_headers(uh);
650 uh->state = HTTP_STATE_REQUEST_DONE;
651 return;
652 }
653
654 if (uh->uc.cb->header_done)
655 uh->uc.cb->header_done(&uh->uc);
656
657 if (uh->eof || seq != uh->uc.seq)
658 return;
659
660 if (uh->req_type == REQ_HEAD || uh->uc.status_code == 204) {
661 uh->eof = true;
662 uclient_notify_eof(uh);
663 }
664 }
665
666 static void uclient_parse_http_line(struct uclient_http *uh, char *data)
667 {
668 char *name;
669 char *sep;
670
671 if (uh->state == HTTP_STATE_REQUEST_DONE) {
672 char *code;
673
674 if (!strlen(data))
675 return;
676
677 /* HTTP/1.1 */
678 strsep(&data, " ");
679
680 code = strsep(&data, " ");
681 if (!code)
682 goto error;
683
684 uh->uc.status_code = strtoul(code, &sep, 10);
685 if (sep && *sep)
686 goto error;
687
688 uh->state = HTTP_STATE_RECV_HEADERS;
689 return;
690 }
691
692 if (!*data) {
693 uclient_http_headers_complete(uh);
694 return;
695 }
696
697 sep = strchr(data, ':');
698 if (!sep)
699 return;
700
701 *(sep++) = 0;
702
703 for (name = data; *name; name++)
704 *name = tolower(*name);
705
706 name = data;
707 while (isspace(*sep))
708 sep++;
709
710 blobmsg_add_string(&uh->meta, name, sep);
711 return;
712
713 error:
714 uh->uc.status_code = 400;
715 uh->eof = true;
716 uclient_notify_eof(uh);
717 }
718
719 static void __uclient_notify_read(struct uclient_http *uh)
720 {
721 struct uclient *uc = &uh->uc;
722 unsigned int seq = uh->seq;
723 char *data;
724 int len;
725
726 if (uh->state < HTTP_STATE_REQUEST_DONE || uh->state == HTTP_STATE_ERROR)
727 return;
728
729 data = ustream_get_read_buf(uh->us, &len);
730 if (!data || !len)
731 return;
732
733 if (uh->state < HTTP_STATE_RECV_DATA) {
734 char *sep, *next;
735 int cur_len;
736
737 do {
738 sep = strchr(data, '\n');
739 if (!sep)
740 break;
741
742 next = sep + 1;
743 if (sep > data && sep[-1] == '\r')
744 sep--;
745
746 /* Check for multi-line HTTP headers */
747 if (sep > data) {
748 if (!*next)
749 return;
750
751 if (isspace(*next) && *next != '\r' && *next != '\n') {
752 sep[0] = ' ';
753 if (sep + 1 < next)
754 sep[1] = ' ';
755 continue;
756 }
757 }
758
759 *sep = 0;
760 cur_len = next - data;
761 uclient_parse_http_line(uh, data);
762 if (seq != uh->seq)
763 return;
764
765 ustream_consume(uh->us, cur_len);
766 len -= cur_len;
767
768 if (uh->eof)
769 return;
770
771 data = ustream_get_read_buf(uh->us, &len);
772 } while (data && uh->state < HTTP_STATE_RECV_DATA);
773
774 if (!len)
775 return;
776 }
777
778 if (uh->eof)
779 return;
780
781 if (uh->state == HTTP_STATE_RECV_DATA) {
782 /* Now it's uclient user turn to read some data */
783 uloop_timeout_cancel(&uc->connection_timeout);
784
785 if (uc->cb->data_read)
786 uc->cb->data_read(uc);
787 }
788 }
789
790 static void __uclient_notify_write(struct uclient_http *uh)
791 {
792 struct uclient *uc = &uh->uc;
793
794 if (uc->cb->data_sent)
795 uc->cb->data_sent(uc);
796 }
797
798 static void uclient_notify_read(struct ustream *us, int bytes)
799 {
800 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
801
802 __uclient_notify_read(uh);
803 }
804
805 static void uclient_notify_write(struct ustream *us, int bytes)
806 {
807 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
808
809 __uclient_notify_write(uh);
810 }
811
812 static void uclient_notify_state(struct ustream *us)
813 {
814 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
815
816 if (uh->ufd.stream.write_error) {
817 uclient_http_error(uh, UCLIENT_ERROR_CONNECT);
818 return;
819 }
820 uclient_notify_eof(uh);
821 }
822
823 static int uclient_setup_http(struct uclient_http *uh)
824 {
825 struct ustream *us = &uh->ufd.stream;
826 int ret;
827
828 uh->us = us;
829 uh->ssl = false;
830
831 us->string_data = true;
832 us->notify_state = uclient_notify_state;
833 us->notify_read = uclient_notify_read;
834 us->notify_write = uclient_notify_write;
835
836 ret = uclient_do_connect(uh, "80");
837 if (ret)
838 return UCLIENT_ERROR_CONNECT;
839
840 return 0;
841 }
842
843 static void uclient_ssl_notify_read(struct ustream *us, int bytes)
844 {
845 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
846
847 __uclient_notify_read(uh);
848 }
849
850 static void uclient_ssl_notify_write(struct ustream *us, int bytes)
851 {
852 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
853
854 __uclient_notify_write(uh);
855 }
856
857 static void uclient_ssl_notify_state(struct ustream *us)
858 {
859 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
860
861 uclient_notify_eof(uh);
862 }
863
864 static void uclient_ssl_notify_error(struct ustream_ssl *ssl, int error, const char *str)
865 {
866 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
867
868 uclient_http_error(uh, UCLIENT_ERROR_CONNECT);
869 }
870
871 static void uclient_ssl_notify_verify_error(struct ustream_ssl *ssl, int error, const char *str)
872 {
873 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
874
875 if (!uh->ssl_require_validation)
876 return;
877
878 uclient_http_error(uh, UCLIENT_ERROR_SSL_INVALID_CERT);
879 }
880
881 static void uclient_ssl_notify_connected(struct ustream_ssl *ssl)
882 {
883 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
884
885 if (!uh->ssl_require_validation)
886 return;
887
888 if (!uh->ussl.valid_cn)
889 uclient_http_error(uh, UCLIENT_ERROR_SSL_CN_MISMATCH);
890 }
891
892 static int uclient_setup_https(struct uclient_http *uh)
893 {
894 struct ustream *us = &uh->ussl.stream;
895 int ret;
896
897 uh->ssl = true;
898 uh->us = us;
899
900 if (!uh->ssl_ctx)
901 return UCLIENT_ERROR_MISSING_SSL_CONTEXT;
902
903 ret = uclient_do_connect(uh, "443");
904 if (ret)
905 return UCLIENT_ERROR_CONNECT;
906
907 us->string_data = true;
908 us->notify_state = uclient_ssl_notify_state;
909 us->notify_read = uclient_ssl_notify_read;
910 us->notify_write = uclient_ssl_notify_write;
911 uh->ussl.notify_error = uclient_ssl_notify_error;
912 uh->ussl.notify_verify_error = uclient_ssl_notify_verify_error;
913 uh->ussl.notify_connected = uclient_ssl_notify_connected;
914 uh->ussl.server_name = uh->uc.url->host;
915 uh->ssl_ops->init(&uh->ussl, &uh->ufd.stream, uh->ssl_ctx, false);
916 uh->ssl_ops->set_peer_cn(&uh->ussl, uh->uc.url->host);
917
918 return 0;
919 }
920
921 static int uclient_http_connect(struct uclient *cl)
922 {
923 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
924 int ret;
925
926 if (!cl->eof || uh->disconnect || uh->connection_close)
927 uclient_http_disconnect(uh);
928
929 uclient_http_init_request(uh);
930
931 if (uh->us)
932 return 0;
933
934 uh->ssl = cl->url->prefix == PREFIX_HTTPS;
935
936 if (uh->ssl)
937 ret = uclient_setup_https(uh);
938 else
939 ret = uclient_setup_http(uh);
940
941 return ret;
942 }
943
944 static void uclient_http_disconnect_cb(struct uloop_timeout *timeout)
945 {
946 struct uclient_http *uh = container_of(timeout, struct uclient_http, disconnect_t);
947
948 uclient_http_disconnect(uh);
949 }
950
951 static struct uclient *uclient_http_alloc(void)
952 {
953 struct uclient_http *uh;
954
955 uh = calloc_a(sizeof(*uh));
956 if (!uh)
957 return NULL;
958
959 uh->disconnect_t.cb = uclient_http_disconnect_cb;
960 blob_buf_init(&uh->headers, 0);
961
962 return &uh->uc;
963 }
964
965 static void uclient_http_free_ssl_ctx(struct uclient_http *uh)
966 {
967 uh->ssl_ops = NULL;
968 uh->ssl_ctx = NULL;
969 }
970
971 static void uclient_http_free(struct uclient *cl)
972 {
973 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
974
975 uclient_http_free_url_state(cl);
976 uclient_http_free_ssl_ctx(uh);
977 blob_buf_free(&uh->headers);
978 blob_buf_free(&uh->meta);
979 free(uh);
980 }
981
982 int
983 uclient_http_set_request_type(struct uclient *cl, const char *type)
984 {
985 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
986 unsigned int i;
987
988 if (cl->backend != &uclient_backend_http)
989 return -1;
990
991 if (uh->state > HTTP_STATE_INIT)
992 return -1;
993
994 for (i = 0; i < ARRAY_SIZE(request_types); i++) {
995 if (strcmp(request_types[i], type) != 0)
996 continue;
997
998 uh->req_type = i;
999 return 0;
1000 }
1001
1002 return -1;
1003 }
1004
1005 int
1006 uclient_http_reset_headers(struct uclient *cl)
1007 {
1008 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1009
1010 blob_buf_init(&uh->headers, 0);
1011
1012 return 0;
1013 }
1014
1015 int
1016 uclient_http_set_header(struct uclient *cl, const char *name, const char *value)
1017 {
1018 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1019
1020 if (cl->backend != &uclient_backend_http)
1021 return -1;
1022
1023 if (uh->state > HTTP_STATE_INIT)
1024 return -1;
1025
1026 blobmsg_add_string(&uh->headers, name, value);
1027 return 0;
1028 }
1029
1030 static int
1031 uclient_http_send_data(struct uclient *cl, const char *buf, unsigned int len)
1032 {
1033 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1034 int err;
1035
1036 if (uh->state >= HTTP_STATE_REQUEST_DONE)
1037 return -1;
1038
1039 err = uclient_http_send_headers(uh);
1040 if (err)
1041 return err;
1042
1043 if (len > 0) {
1044 ustream_printf(uh->us, "%X\r\n", len);
1045 ustream_write(uh->us, buf, len, false);
1046 ustream_printf(uh->us, "\r\n");
1047 }
1048
1049 return len;
1050 }
1051
1052 static int
1053 uclient_http_request_done(struct uclient *cl)
1054 {
1055 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1056 int err;
1057
1058 if (uh->state >= HTTP_STATE_REQUEST_DONE)
1059 return -1;
1060
1061 err = uclient_http_send_headers(uh);
1062 if (err)
1063 return err;
1064
1065 if (uclient_request_supports_body(uh->req_type))
1066 ustream_printf(uh->us, "0\r\n\r\n");
1067 uh->state = HTTP_STATE_REQUEST_DONE;
1068
1069 return 0;
1070 }
1071
1072 static int
1073 uclient_http_read(struct uclient *cl, char *buf, unsigned int len)
1074 {
1075 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1076 int read_len = 0;
1077 char *data, *data_end;
1078
1079 if (uh->state < HTTP_STATE_RECV_DATA || !uh->us)
1080 return 0;
1081
1082 data = ustream_get_read_buf(uh->us, &read_len);
1083 if (!data || !read_len)
1084 return 0;
1085
1086 data_end = data + read_len;
1087 read_len = 0;
1088
1089 if (uh->read_chunked == 0) {
1090 char *sep;
1091
1092 if (data[0] == '\r' && data[1] == '\n') {
1093 data += 2;
1094 read_len += 2;
1095 }
1096
1097 sep = strstr(data, "\r\n");
1098 if (!sep)
1099 return 0;
1100
1101 *sep = 0;
1102 uh->read_chunked = strtoul(data, NULL, 16);
1103
1104 read_len += sep + 2 - data;
1105 data = sep + 2;
1106
1107 if (!uh->read_chunked) {
1108 uh->eof = true;
1109 uh->uc.data_eof = true;
1110 }
1111 }
1112
1113 if (len > data_end - data)
1114 len = data_end - data;
1115
1116 if (uh->read_chunked >= 0) {
1117 if (len > uh->read_chunked)
1118 len = uh->read_chunked;
1119
1120 uh->read_chunked -= len;
1121 } else if (uh->content_length >= 0) {
1122 if (len > uh->content_length)
1123 len = uh->content_length;
1124
1125 uh->content_length -= len;
1126 if (!uh->content_length) {
1127 uh->eof = true;
1128 uh->uc.data_eof = true;
1129 }
1130 }
1131
1132 if (len > 0) {
1133 read_len += len;
1134 memcpy(buf, data, len);
1135 }
1136
1137 if (read_len > 0)
1138 ustream_consume(uh->us, read_len);
1139
1140 uclient_notify_eof(uh);
1141
1142 /* Now that we consumed something and if this isn't EOF, start timer again */
1143 if (!uh->uc.eof && !cl->connection_timeout.pending)
1144 uloop_timeout_set(&cl->connection_timeout, cl->timeout_msecs);
1145
1146 return len;
1147 }
1148
1149 int uclient_http_redirect(struct uclient *cl)
1150 {
1151 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1152 struct blobmsg_policy location = {
1153 .name = "location",
1154 .type = BLOBMSG_TYPE_STRING,
1155 };
1156 struct uclient_url *url = cl->url;
1157 struct blob_attr *tb;
1158
1159 if (cl->backend != &uclient_backend_http)
1160 return false;
1161
1162 switch (cl->status_code) {
1163 case 301:
1164 case 302:
1165 case 307:
1166 break;
1167 default:
1168 return false;
1169 }
1170
1171 blobmsg_parse(&location, 1, &tb, blob_data(uh->meta.head), blob_len(uh->meta.head));
1172 if (!tb)
1173 return false;
1174
1175 url = uclient_get_url_location(url, blobmsg_data(tb));
1176 if (!url)
1177 return false;
1178
1179 if (cl->proxy_url) {
1180 free(cl->proxy_url);
1181 cl->proxy_url = url;
1182 }
1183 else {
1184 free(cl->url);
1185 cl->url = url;
1186 }
1187
1188 if (uclient_http_connect(cl))
1189 return -1;
1190
1191 uclient_http_request_done(cl);
1192
1193 return true;
1194 }
1195
1196 int uclient_http_set_ssl_ctx(struct uclient *cl, const struct ustream_ssl_ops *ops,
1197 struct ustream_ssl_ctx *ctx, bool require_validation)
1198 {
1199 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1200
1201 if (cl->backend != &uclient_backend_http)
1202 return -1;
1203
1204 uclient_http_free_url_state(cl);
1205
1206 uclient_http_free_ssl_ctx(uh);
1207 uh->ssl_ops = ops;
1208 uh->ssl_ctx = ctx;
1209 uh->ssl_require_validation = !!ctx && require_validation;
1210
1211 return 0;
1212 }
1213
1214 int uclient_http_set_address_family(struct uclient *cl, int af)
1215 {
1216 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1217
1218 if (cl->backend != &uclient_backend_http)
1219 return -1;
1220
1221 switch (af) {
1222 case AF_INET:
1223 uh->usock_flags = USOCK_IPV4ONLY;
1224 break;
1225 case AF_INET6:
1226 uh->usock_flags = USOCK_IPV6ONLY;
1227 break;
1228 default:
1229 uh->usock_flags = 0;
1230 break;
1231 }
1232
1233 return 0;
1234 }
1235
1236 const struct uclient_backend uclient_backend_http = {
1237 .prefix = uclient_http_prefix,
1238
1239 .alloc = uclient_http_alloc,
1240 .free = uclient_http_free,
1241 .connect = uclient_http_connect,
1242 .disconnect = uclient_http_request_disconnect,
1243 .update_url = uclient_http_free_url_state,
1244 .update_proxy_url = uclient_http_free_url_state,
1245
1246 .read = uclient_http_read,
1247 .write = uclient_http_send_data,
1248 .request = uclient_http_request_done,
1249 };