2 * uclient - ustream based protocol client library
4 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
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.
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.
18 #include <sys/socket.h>
26 #include <libubox/ustream.h>
27 #include <libubox/ustream-ssl.h>
28 #include <libubox/usock.h>
29 #include <libubox/blobmsg.h>
32 #include "uclient-utils.h"
33 #include "uclient-backend.h"
53 HTTP_STATE_HEADERS_SENT,
54 HTTP_STATE_REQUEST_DONE,
55 HTTP_STATE_RECV_HEADERS,
60 static const char * const request_types[__REQ_MAX] = {
65 [REQ_DELETE] = "DELETE",
71 const struct ustream_ssl_ops *ssl_ops;
72 struct ustream_ssl_ctx *ssl_ctx;
75 struct ustream_fd ufd;
76 struct ustream_ssl ussl;
78 struct uloop_timeout disconnect_t;
81 bool ssl_require_validation;
84 bool connection_close;
86 enum request_type req_type;
87 enum http_state state;
89 enum auth_type auth_type;
99 struct blob_buf headers;
100 struct blob_buf meta;
109 static const char * const uclient_http_prefix[] = {
110 [PREFIX_HTTP] = "http://",
111 [PREFIX_HTTPS] = "https://",
112 [__PREFIX_MAX] = NULL
115 static int uclient_http_connect(struct uclient *cl);
117 static int uclient_do_connect(struct uclient_http *uh, const char *port)
122 if (uh->uc.url->port)
123 port = uh->uc.url->port;
125 memset(&uh->uc.remote_addr, 0, sizeof(uh->uc.remote_addr));
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);
133 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
134 ustream_fd_init(&uh->ufd, fd);
136 sl = sizeof(uh->uc.local_addr);
137 memset(&uh->uc.local_addr, 0, sl);
138 getsockname(fd, &uh->uc.local_addr.sa, &sl);
143 static void uclient_http_disconnect(struct uclient_http *uh)
145 uloop_timeout_cancel(&uh->disconnect_t);
150 ustream_free(&uh->ussl.stream);
151 ustream_free(&uh->ufd.stream);
152 close(uh->ufd.fd.fd);
156 static void uclient_http_free_url_state(struct uclient *cl)
158 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
160 uh->auth_type = AUTH_TYPE_UNKNOWN;
163 uclient_http_disconnect(uh);
166 static void uclient_http_error(struct uclient_http *uh, int code)
168 uh->state = HTTP_STATE_ERROR;
170 ustream_state_change(uh->us);
171 uclient_backend_set_error(&uh->uc, code);
174 static void uclient_http_request_disconnect(struct uclient *cl)
176 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
182 uh->disconnect = true;
183 uloop_timeout_set(&uh->disconnect_t, 1);
186 static void uclient_notify_eof(struct uclient_http *uh)
188 struct ustream *us = uh->us;
194 if (!us->eof && !us->write_error)
197 if (ustream_pending_data(us, false))
201 if (uh->content_length < 0 && uh->read_chunked >= 0)
202 uh->uc.data_eof = true;
204 uclient_backend_set_eof(&uh->uc);
206 if (uh->connection_close)
207 uclient_http_request_disconnect(&uh->uc);
210 static void uclient_http_reset_state(struct uclient_http *uh)
213 uclient_backend_reset_state(&uh->uc);
214 uh->read_chunked = -1;
215 uh->content_length = -1;
217 uh->disconnect = false;
218 uh->connection_close = false;
219 uh->state = HTTP_STATE_INIT;
221 if (uh->auth_type == AUTH_TYPE_UNKNOWN && !uh->uc.url->auth)
222 uh->auth_type = AUTH_TYPE_NONE;
225 static void uclient_http_init_request(struct uclient_http *uh)
228 uclient_http_reset_state(uh);
229 blob_buf_init(&uh->meta, 0);
232 static enum auth_type
233 uclient_http_update_auth_type(struct uclient_http *uh)
236 return AUTH_TYPE_NONE;
238 if (!strncasecmp(uh->auth_str, "basic", 5))
239 return AUTH_TYPE_BASIC;
241 if (!strncasecmp(uh->auth_str, "digest", 6))
242 return AUTH_TYPE_DIGEST;
244 return AUTH_TYPE_NONE;
247 static void uclient_http_process_headers(struct uclient_http *uh)
250 HTTP_HDR_TRANSFER_ENCODING,
252 HTTP_HDR_CONTENT_LENGTH,
256 static const struct blobmsg_policy hdr_policy[__HTTP_HDR_MAX] = {
257 #define hdr(_name) { .name = _name, .type = BLOBMSG_TYPE_STRING }
258 [HTTP_HDR_TRANSFER_ENCODING] = hdr("transfer-encoding"),
259 [HTTP_HDR_CONNECTION] = hdr("connection"),
260 [HTTP_HDR_CONTENT_LENGTH] = hdr("content-length"),
261 [HTTP_HDR_AUTH] = hdr("www-authenticate"),
264 struct blob_attr *tb[__HTTP_HDR_MAX];
265 struct blob_attr *cur;
267 blobmsg_parse(hdr_policy, __HTTP_HDR_MAX, tb, blob_data(uh->meta.head), blob_len(uh->meta.head));
269 cur = tb[HTTP_HDR_TRANSFER_ENCODING];
270 if (cur && strstr(blobmsg_data(cur), "chunked"))
271 uh->read_chunked = 0;
273 cur = tb[HTTP_HDR_CONNECTION];
274 if (cur && strstr(blobmsg_data(cur), "close"))
275 uh->connection_close = true;
277 cur = tb[HTTP_HDR_CONTENT_LENGTH];
279 uh->content_length = strtoul(blobmsg_data(cur), NULL, 10);
281 cur = tb[HTTP_HDR_AUTH];
284 uh->auth_str = strdup(blobmsg_data(cur));
287 uh->auth_type = uclient_http_update_auth_type(uh);
290 static bool uclient_request_supports_body(enum request_type req_type)
303 uclient_http_add_auth_basic(struct uclient_http *uh)
305 struct uclient_url *url = uh->uc.url;
306 int auth_len = strlen(url->auth);
312 auth_buf = alloca(base64_len(auth_len) + 1);
316 base64_encode(url->auth, auth_len, auth_buf);
317 ustream_printf(uh->us, "Authorization: Basic %s\r\n", auth_buf);
322 static char *digest_unquote_sep(char **str)
324 char *cur = *str + 1;
356 static char *digest_sep(char **str)
361 next = strchr(*str, ',');
366 *str += strlen(*str);
372 static bool strmatch(char **str, const char *prefix)
374 int len = strlen(prefix);
376 if (strncmp(*str, prefix, len) != 0 || (*str)[len] != '=')
384 get_cnonce(char *dest)
390 f = fopen("/dev/urandom", "r");
392 n = fread(&val, sizeof(val), 1, f);
398 bin_to_hex(dest, &val, sizeof(val));
401 static void add_field(char **buf, int *ofs, int *len, const char *name, const char *val)
403 int available = *len - *ofs;
411 required = strlen(name) + 4 + strlen(val) * 2;
412 if (required > available)
413 *len += required - available + 64;
415 *buf = realloc(*buf, *len);
420 cur += sprintf(cur, ", %s=\"", name);
422 while ((next = strchr(val, '"'))) {
424 memcpy(cur, val, next - val);
428 cur += sprintf(cur, "\\\"");
432 cur += sprintf(cur, "%s\"", val);
437 uclient_http_add_auth_digest(struct uclient_http *uh)
439 struct uclient_url *url = uh->uc.url;
440 const char *realm = NULL, *opaque = NULL;
441 const char *user, *password;
442 char *buf, *next, *buf_orig;
451 struct http_digest_data data = {
453 .cnonce = cnonce_str,
457 len = strlen(uh->auth_str) + 1;
469 strcpy(buf, uh->auth_str);
472 buf_orig = strsep(&buf, " ");
476 const char **dest = NULL;
479 while (*next && isspace(*next))
482 if (strmatch(&next, "realm"))
484 else if (strmatch(&next, "qop"))
486 else if (strmatch(&next, "nonce"))
488 else if (strmatch(&next, "opaque"))
490 else if (strmatch(&next, "stale") ||
491 strmatch(&next, "algorithm") ||
492 strmatch(&next, "auth-param")) {
495 } else if (strmatch(&next, "domain") ||
496 strmatch(&next, "qop-options"))
503 *dest = digest_unquote_sep(&next);
506 if (!realm || !data.qop || !data.nonce) {
511 sprintf(nc_str, "%08x", uh->nc++);
512 get_cnonce(cnonce_str);
515 data.uri = url->location;
516 data.method = request_types[uh->req_type];
518 password = strchr(url->auth, ':');
522 len = password - url->auth;
528 user_buf = alloca(len + 1);
534 strncpy(user_buf, url->auth, len);
543 http_digest_calculate_auth_hash(ahash, user, realm, password);
544 http_digest_calculate_response(hash, &data);
550 add_field(&buf, &ofs, &len, "username", user);
551 add_field(&buf, &ofs, &len, "realm", realm);
552 add_field(&buf, &ofs, &len, "nonce", data.nonce);
553 add_field(&buf, &ofs, &len, "uri", data.uri);
554 add_field(&buf, &ofs, &len, "cnonce", data.cnonce);
555 add_field(&buf, &ofs, &len, "response", hash);
557 add_field(&buf, &ofs, &len, "opaque", opaque);
559 ustream_printf(uh->us, "Authorization: Digest nc=%s, qop=%s%s\r\n", data.nc, data.qop, buf);
572 uclient_http_add_auth_header(struct uclient_http *uh)
574 if (!uh->uc.url->auth)
577 switch (uh->auth_type) {
578 case AUTH_TYPE_UNKNOWN:
581 case AUTH_TYPE_BASIC:
582 return uclient_http_add_auth_basic(uh);
583 case AUTH_TYPE_DIGEST:
584 return uclient_http_add_auth_digest(uh);
591 uclient_http_send_headers(struct uclient_http *uh)
593 struct uclient_url *url = uh->uc.url;
594 struct blob_attr *cur;
595 enum request_type req_type = uh->req_type;
599 if (uh->state >= HTTP_STATE_HEADERS_SENT)
602 if (uh->uc.proxy_url)
603 url = uh->uc.proxy_url;
605 literal_ipv6 = strchr(url->host, ':');
607 ustream_printf(uh->us,
609 "Host: %s%s%s%s%s\r\n",
610 request_types[req_type], url->location,
611 literal_ipv6 ? "[" : "",
613 literal_ipv6 ? "]" : "",
614 url->port ? ":" : "",
615 url->port ? url->port : "");
617 blobmsg_for_each_attr(cur, uh->headers.head, rem)
618 ustream_printf(uh->us, "%s: %s\r\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
620 if (uclient_request_supports_body(uh->req_type))
621 ustream_printf(uh->us, "Transfer-Encoding: chunked\r\n");
623 err = uclient_http_add_auth_header(uh);
627 ustream_printf(uh->us, "\r\n");
629 uh->state = HTTP_STATE_HEADERS_SENT;
634 static void uclient_http_headers_complete(struct uclient_http *uh)
636 enum auth_type auth_type = uh->auth_type;
637 int seq = uh->uc.seq;
639 uh->state = HTTP_STATE_RECV_DATA;
640 uh->uc.meta = uh->meta.head;
641 uclient_http_process_headers(uh);
643 if (auth_type == AUTH_TYPE_UNKNOWN && uh->uc.status_code == 401 &&
644 (uh->req_type == REQ_HEAD || uh->req_type == REQ_GET)) {
645 uclient_http_connect(&uh->uc);
646 uclient_http_send_headers(uh);
647 uh->state = HTTP_STATE_REQUEST_DONE;
651 if (uh->uc.cb->header_done)
652 uh->uc.cb->header_done(&uh->uc);
654 if (uh->eof || seq != uh->uc.seq)
657 if (uh->req_type == REQ_HEAD || uh->uc.status_code == 204) {
659 uclient_notify_eof(uh);
663 static void uclient_parse_http_line(struct uclient_http *uh, char *data)
668 if (uh->state == HTTP_STATE_REQUEST_DONE) {
677 code = strsep(&data, " ");
681 uh->uc.status_code = strtoul(code, &sep, 10);
685 uh->state = HTTP_STATE_RECV_HEADERS;
690 uclient_http_headers_complete(uh);
694 sep = strchr(data, ':');
700 for (name = data; *name; name++)
701 *name = tolower(*name);
704 while (isspace(*sep))
707 blobmsg_add_string(&uh->meta, name, sep);
711 uh->uc.status_code = 400;
713 uclient_notify_eof(uh);
716 static void __uclient_notify_read(struct uclient_http *uh)
718 struct uclient *uc = &uh->uc;
719 unsigned int seq = uh->seq;
723 if (uh->state < HTTP_STATE_REQUEST_DONE || uh->state == HTTP_STATE_ERROR)
726 data = ustream_get_read_buf(uh->us, &len);
730 if (uh->state < HTTP_STATE_RECV_DATA) {
735 sep = strchr(data, '\n');
740 if (sep > data && sep[-1] == '\r')
743 /* Check for multi-line HTTP headers */
748 if (isspace(*next) && *next != '\r' && *next != '\n') {
757 cur_len = next - data;
758 uclient_parse_http_line(uh, data);
762 ustream_consume(uh->us, cur_len);
768 data = ustream_get_read_buf(uh->us, &len);
769 } while (data && uh->state < HTTP_STATE_RECV_DATA);
778 if (uh->state == HTTP_STATE_RECV_DATA) {
779 /* Now it's uclient user turn to read some data */
780 uloop_timeout_cancel(&uc->connection_timeout);
782 if (uc->cb->data_read)
783 uc->cb->data_read(uc);
787 static void __uclient_notify_write(struct uclient_http *uh)
789 struct uclient *uc = &uh->uc;
791 if (uc->cb->data_sent)
792 uc->cb->data_sent(uc);
795 static void uclient_notify_read(struct ustream *us, int bytes)
797 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
799 __uclient_notify_read(uh);
802 static void uclient_notify_write(struct ustream *us, int bytes)
804 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
806 __uclient_notify_write(uh);
809 static void uclient_notify_state(struct ustream *us)
811 struct uclient_http *uh = container_of(us, struct uclient_http, ufd.stream);
813 if (uh->ufd.stream.write_error) {
814 uclient_http_error(uh, UCLIENT_ERROR_CONNECT);
817 uclient_notify_eof(uh);
820 static int uclient_setup_http(struct uclient_http *uh)
822 struct ustream *us = &uh->ufd.stream;
828 us->string_data = true;
829 us->notify_state = uclient_notify_state;
830 us->notify_read = uclient_notify_read;
831 us->notify_write = uclient_notify_write;
833 ret = uclient_do_connect(uh, "80");
835 return UCLIENT_ERROR_CONNECT;
840 static void uclient_ssl_notify_read(struct ustream *us, int bytes)
842 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
844 __uclient_notify_read(uh);
847 static void uclient_ssl_notify_write(struct ustream *us, int bytes)
849 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
851 __uclient_notify_write(uh);
854 static void uclient_ssl_notify_state(struct ustream *us)
856 struct uclient_http *uh = container_of(us, struct uclient_http, ussl.stream);
858 uclient_notify_eof(uh);
861 static void uclient_ssl_notify_error(struct ustream_ssl *ssl, int error, const char *str)
863 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
865 uclient_http_error(uh, UCLIENT_ERROR_CONNECT);
868 static void uclient_ssl_notify_verify_error(struct ustream_ssl *ssl, int error, const char *str)
870 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
872 if (!uh->ssl_require_validation)
875 uclient_http_error(uh, UCLIENT_ERROR_SSL_INVALID_CERT);
878 static void uclient_ssl_notify_connected(struct ustream_ssl *ssl)
880 struct uclient_http *uh = container_of(ssl, struct uclient_http, ussl);
882 if (!uh->ssl_require_validation)
885 if (!uh->ussl.valid_cn)
886 uclient_http_error(uh, UCLIENT_ERROR_SSL_CN_MISMATCH);
889 static int uclient_setup_https(struct uclient_http *uh)
891 struct ustream *us = &uh->ussl.stream;
898 return UCLIENT_ERROR_MISSING_SSL_CONTEXT;
900 ret = uclient_do_connect(uh, "443");
902 return UCLIENT_ERROR_CONNECT;
904 us->string_data = true;
905 us->notify_state = uclient_ssl_notify_state;
906 us->notify_read = uclient_ssl_notify_read;
907 us->notify_write = uclient_ssl_notify_write;
908 uh->ussl.notify_error = uclient_ssl_notify_error;
909 uh->ussl.notify_verify_error = uclient_ssl_notify_verify_error;
910 uh->ussl.notify_connected = uclient_ssl_notify_connected;
911 uh->ussl.server_name = uh->uc.url->host;
912 uh->ssl_ops->init(&uh->ussl, &uh->ufd.stream, uh->ssl_ctx, false);
913 uh->ssl_ops->set_peer_cn(&uh->ussl, uh->uc.url->host);
918 static int uclient_http_connect(struct uclient *cl)
920 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
923 if (!cl->eof || uh->disconnect || uh->connection_close)
924 uclient_http_disconnect(uh);
926 uclient_http_init_request(uh);
931 uh->ssl = cl->url->prefix == PREFIX_HTTPS;
934 ret = uclient_setup_https(uh);
936 ret = uclient_setup_http(uh);
941 static void uclient_http_disconnect_cb(struct uloop_timeout *timeout)
943 struct uclient_http *uh = container_of(timeout, struct uclient_http, disconnect_t);
945 uclient_http_disconnect(uh);
948 static struct uclient *uclient_http_alloc(void)
950 struct uclient_http *uh;
952 uh = calloc_a(sizeof(*uh));
956 uh->disconnect_t.cb = uclient_http_disconnect_cb;
957 blob_buf_init(&uh->headers, 0);
962 static void uclient_http_free_ssl_ctx(struct uclient_http *uh)
968 static void uclient_http_free(struct uclient *cl)
970 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
972 uclient_http_free_url_state(cl);
973 uclient_http_free_ssl_ctx(uh);
974 blob_buf_free(&uh->headers);
975 blob_buf_free(&uh->meta);
980 uclient_http_set_request_type(struct uclient *cl, const char *type)
982 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
985 if (cl->backend != &uclient_backend_http)
988 if (uh->state > HTTP_STATE_INIT)
991 for (i = 0; i < ARRAY_SIZE(request_types); i++) {
992 if (strcmp(request_types[i], type) != 0)
1003 uclient_http_reset_headers(struct uclient *cl)
1005 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1007 blob_buf_init(&uh->headers, 0);
1013 uclient_http_set_header(struct uclient *cl, const char *name, const char *value)
1015 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1017 if (cl->backend != &uclient_backend_http)
1020 if (uh->state > HTTP_STATE_INIT)
1023 blobmsg_add_string(&uh->headers, name, value);
1028 uclient_http_send_data(struct uclient *cl, const char *buf, unsigned int len)
1030 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1033 if (uh->state >= HTTP_STATE_REQUEST_DONE)
1036 err = uclient_http_send_headers(uh);
1041 ustream_printf(uh->us, "%X\r\n", len);
1042 ustream_write(uh->us, buf, len, false);
1043 ustream_printf(uh->us, "\r\n");
1050 uclient_http_request_done(struct uclient *cl)
1052 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1055 if (uh->state >= HTTP_STATE_REQUEST_DONE)
1058 err = uclient_http_send_headers(uh);
1062 if (uclient_request_supports_body(uh->req_type))
1063 ustream_printf(uh->us, "0\r\n\r\n");
1064 uh->state = HTTP_STATE_REQUEST_DONE;
1070 uclient_http_read(struct uclient *cl, char *buf, unsigned int len)
1072 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1074 char *data, *data_end;
1076 if (uh->state < HTTP_STATE_RECV_DATA || !uh->us)
1079 data = ustream_get_read_buf(uh->us, &read_len);
1080 if (!data || !read_len)
1083 data_end = data + read_len;
1086 if (uh->read_chunked == 0) {
1089 if (data[0] == '\r' && data[1] == '\n') {
1094 sep = strstr(data, "\r\n");
1099 uh->read_chunked = strtoul(data, NULL, 16);
1101 read_len += sep + 2 - data;
1104 if (!uh->read_chunked) {
1106 uh->uc.data_eof = true;
1110 if (len > data_end - data)
1111 len = data_end - data;
1113 if (uh->read_chunked >= 0) {
1114 if (len > uh->read_chunked)
1115 len = uh->read_chunked;
1117 uh->read_chunked -= len;
1118 } else if (uh->content_length >= 0) {
1119 if (len > uh->content_length)
1120 len = uh->content_length;
1122 uh->content_length -= len;
1123 if (!uh->content_length) {
1125 uh->uc.data_eof = true;
1131 memcpy(buf, data, len);
1135 ustream_consume(uh->us, read_len);
1137 uclient_notify_eof(uh);
1139 /* Now that we consumed something and if this isn't EOF, start timer again */
1140 if (!uh->uc.eof && !cl->connection_timeout.pending)
1141 uloop_timeout_set(&cl->connection_timeout, cl->timeout_msecs);
1146 int uclient_http_redirect(struct uclient *cl)
1148 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1149 struct blobmsg_policy location = {
1151 .type = BLOBMSG_TYPE_STRING,
1153 struct uclient_url *url = cl->url;
1154 struct blob_attr *tb;
1156 if (cl->backend != &uclient_backend_http)
1159 switch (cl->status_code) {
1168 blobmsg_parse(&location, 1, &tb, blob_data(uh->meta.head), blob_len(uh->meta.head));
1172 url = uclient_get_url_location(url, blobmsg_data(tb));
1178 if (uclient_http_connect(cl))
1181 uclient_http_request_done(cl);
1186 int uclient_http_set_ssl_ctx(struct uclient *cl, const struct ustream_ssl_ops *ops,
1187 struct ustream_ssl_ctx *ctx, bool require_validation)
1189 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1191 if (cl->backend != &uclient_backend_http)
1194 uclient_http_free_url_state(cl);
1196 uclient_http_free_ssl_ctx(uh);
1199 uh->ssl_require_validation = !!ctx && require_validation;
1204 int uclient_http_set_address_family(struct uclient *cl, int af)
1206 struct uclient_http *uh = container_of(cl, struct uclient_http, uc);
1208 if (cl->backend != &uclient_backend_http)
1213 uh->usock_flags = USOCK_IPV4ONLY;
1216 uh->usock_flags = USOCK_IPV6ONLY;
1219 uh->usock_flags = 0;
1226 const struct uclient_backend uclient_backend_http = {
1227 .prefix = uclient_http_prefix,
1229 .alloc = uclient_http_alloc,
1230 .free = uclient_http_free,
1231 .connect = uclient_http_connect,
1232 .disconnect = uclient_http_request_disconnect,
1233 .update_url = uclient_http_free_url_state,
1234 .update_proxy_url = uclient_http_free_url_state,
1236 .read = uclient_http_read,
1237 .write = uclient_http_send_data,
1238 .request = uclient_http_request_done,