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 <arpa/inet.h>
19 #include <libubox/ustream-ssl.h>
21 #include "uclient-utils.h"
22 #include "uclient-backend.h"
24 char *uclient_get_addr(char *dest, int *port, union uclient_addr *a)
29 switch(a->sa.sa_family) {
31 ptr = &a->sin.sin_addr;
32 portval = a->sin.sin_port;
35 ptr = &a->sin6.sin6_addr;
36 portval = a->sin6.sin6_port;
39 return strcpy(dest, "Unknown");
42 inet_ntop(a->sa.sa_family, ptr, dest, INET6_ADDRSTRLEN);
44 *port = ntohs(portval);
49 static struct uclient_url *
50 __uclient_get_url(const struct uclient_backend *backend,
51 const char *host, int host_len,
52 const char *location, const char *auth_str)
54 struct uclient_url *url;
55 char *host_buf, *uri_buf, *auth_buf, *next;
57 url = calloc_a(sizeof(*url),
58 &host_buf, host_len + 1,
59 &uri_buf, strlen(location) + 1,
60 &auth_buf, auth_str ? strlen(auth_str) + 1 : 0);
65 url->backend = backend;
66 url->location = strcpy(uri_buf, location);
68 url->host = strncpy(host_buf, host, host_len);
70 next = strchr(host_buf, '@');
75 if (uclient_urldecode(host_buf, host_buf, false) < 0)
81 if (!url->auth && auth_str)
82 url->auth = strcpy(auth_buf, auth_str);
84 /* Literal IPv6 address */
85 if (*url->host == '[') {
87 next = strrchr(url->host, ']');
95 next = strrchr(url->host, ':');
110 uclient_split_host(const char *base, int *host_len)
112 char *next, *location;
114 next = strchr(base, '/');
117 *host_len = next - base;
120 *host_len = strlen(base);
126 struct uclient_url __hidden *
127 uclient_get_url_location(struct uclient_url *url, const char *location)
129 struct uclient_url *new_url;
130 char *host_buf, *uri_buf, *auth_buf, *port_buf;
131 int host_len = strlen(url->host) + 1;
132 int auth_len = url->auth ? strlen(url->auth) + 1 : 0;
133 int port_len = url->port ? strlen(url->port) + 1 : 0;
136 if (strstr(location, "://"))
137 return uclient_get_url(location, url->auth);
139 if (location[0] == '/')
140 uri_len = strlen(location) + 1;
142 uri_len = strlen(url->location) + strlen(location) + 2;
144 new_url = calloc_a(sizeof(*url),
148 &auth_buf, auth_len);
153 new_url->backend = url->backend;
154 new_url->prefix = url->prefix;
155 new_url->host = strcpy(host_buf, url->host);
157 new_url->port = strcpy(port_buf, url->port);
159 new_url->auth = strcpy(auth_buf, url->auth);
161 new_url->location = uri_buf;
162 if (location[0] == '/')
163 strcpy(uri_buf, location);
165 int len = strcspn(url->location, "?#");
168 memcpy(buf, url->location, len);
169 if (buf[len - 1] != '/') {
175 strcpy(buf, location);
181 struct uclient_url __hidden *
182 uclient_get_url(const char *url_str, const char *auth_str)
184 static const struct uclient_backend *backends[] = {
185 &uclient_backend_http,
188 const struct uclient_backend *backend;
189 const char * const *prefix = NULL;
190 struct uclient_url *url;
191 const char *location;
195 for (i = 0; i < ARRAY_SIZE(backends); i++) {
198 for (prefix = backends[i]->prefix; *prefix; prefix++) {
199 prefix_len = strlen(*prefix);
201 if (!strncmp(url_str, *prefix, prefix_len))
208 url_str += prefix_len;
209 backend = backends[i];
216 location = uclient_split_host(url_str, &host_len);
217 url = __uclient_get_url(backend, url_str, host_len, location, auth_str);
221 url->prefix = prefix - backend->prefix;
225 static void uclient_connection_timeout(struct uloop_timeout *timeout)
227 struct uclient *cl = container_of(timeout, struct uclient, connection_timeout);
229 if (cl->backend->disconnect)
230 cl->backend->disconnect(cl);
232 uclient_backend_set_error(cl, UCLIENT_ERROR_TIMEDOUT);
235 struct uclient *uclient_new(const char *url_str, const char *auth_str, const struct uclient_cb *cb)
238 struct uclient_url *url;
240 url = uclient_get_url(url_str, auth_str);
244 cl = url->backend->alloc();
248 cl->backend = url->backend;
251 cl->timeout_msecs = UCLIENT_DEFAULT_TIMEOUT_MS;
252 cl->connection_timeout.cb = uclient_connection_timeout;
257 int uclient_set_proxy_url(struct uclient *cl, const char *url_str, const char *auth_str)
259 const struct uclient_backend *backend = cl->backend;
260 struct uclient_url *url;
264 if (!backend->update_proxy_url)
267 next = strstr(url_str, "://");
272 uclient_split_host(host, &host_len);
274 url = __uclient_get_url(NULL, host, host_len, url_str, auth_str);
281 if (backend->update_proxy_url)
282 backend->update_proxy_url(cl);
287 int uclient_set_url(struct uclient *cl, const char *url_str, const char *auth_str)
289 const struct uclient_backend *backend = cl->backend;
290 struct uclient_url *url = cl->url;
292 url = uclient_get_url(url_str, auth_str);
296 if (url->backend != cl->backend) {
302 cl->proxy_url = NULL;
307 if (backend->update_url)
308 backend->update_url(cl);
313 int uclient_set_timeout(struct uclient *cl, int msecs)
318 cl->timeout_msecs = msecs;
323 int uclient_connect(struct uclient *cl)
325 return cl->backend->connect(cl);
328 void uclient_free(struct uclient *cl)
330 struct uclient_url *url = cl->url;
332 if (cl->backend->free)
333 cl->backend->free(cl);
340 int uclient_write(struct uclient *cl, const char *buf, int len)
342 if (!cl->backend->write)
345 return cl->backend->write(cl, buf, len);
348 int uclient_request(struct uclient *cl)
352 if (!cl->backend->request)
355 err = cl->backend->request(cl);
359 uloop_timeout_set(&cl->connection_timeout, cl->timeout_msecs);
364 int uclient_read(struct uclient *cl, char *buf, int len)
366 if (!cl->backend->read)
369 return cl->backend->read(cl, buf, len);
372 void uclient_disconnect(struct uclient *cl)
374 uloop_timeout_cancel(&cl->connection_timeout);
376 if (!cl->backend->disconnect)
379 cl->backend->disconnect(cl);
382 static void __uclient_backend_change_state(struct uloop_timeout *timeout)
384 struct uclient *cl = container_of(timeout, struct uclient, timeout);
386 if (cl->error_code && cl->cb->error)
387 cl->cb->error(cl, cl->error_code);
388 else if (cl->eof && cl->cb->data_eof)
389 cl->cb->data_eof(cl);
392 static void uclient_backend_change_state(struct uclient *cl)
394 cl->timeout.cb = __uclient_backend_change_state;
395 uloop_timeout_set(&cl->timeout, 1);
398 void __hidden uclient_backend_set_error(struct uclient *cl, int code)
403 uloop_timeout_cancel(&cl->connection_timeout);
404 cl->error_code = code;
405 uclient_backend_change_state(cl);
408 void __hidden uclient_backend_set_eof(struct uclient *cl)
410 if (cl->eof || cl->error_code)
413 uloop_timeout_cancel(&cl->connection_timeout);
415 uclient_backend_change_state(cl);
418 void __hidden uclient_backend_reset_state(struct uclient *cl)
420 cl->data_eof = false;
423 uloop_timeout_cancel(&cl->timeout);
426 const char * uclient_strerror(unsigned err)
429 case UCLIENT_ERROR_UNKNOWN:
430 return "unknown error";
431 case UCLIENT_ERROR_CONNECT:
432 return "connect failed";
433 case UCLIENT_ERROR_TIMEDOUT:
435 case UCLIENT_ERROR_SSL_INVALID_CERT:
436 return "ssl invalid cert";
437 case UCLIENT_ERROR_SSL_CN_MISMATCH:
438 return "ssl cn mismatch";
439 case UCLIENT_ERROR_MISSING_SSL_CONTEXT:
440 return "missing ssl context";
442 return "invalid error code";