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.
27 #include <libubox/blobmsg.h>
30 #include "uclient-utils.h"
33 #define LIB_EXT "dylib"
38 static struct ustream_ssl_ctx *ssl_ctx;
39 static const struct ustream_ssl_ops *ssl_ops;
40 static int quiet = false;
41 static bool verify = true;
42 static bool default_certs = false;
43 static const char *output_file;
44 static int output_fd = -1;
47 static char *username;
48 static char *password;
49 static char *auth_str;
51 static int open_output_file(const char *path, bool create)
58 flags |= O_CREAT | O_EXCL;
61 if (!strcmp(output_file, "-"))
65 fprintf(stderr, "Writing to stdout\n");
68 return open(output_file, flags, 0644);
71 filename = uclient_get_url_filename(path, "index.html");
73 fprintf(stderr, "Writing to '%s'\n", filename);
74 ret = open(filename, flags, 0644);
80 static void request_done(struct uclient *cl)
82 if (output_fd >= 0 && !output_file) {
86 uclient_disconnect(cl);
90 static void header_done_cb(struct uclient *cl)
94 if (retries < 10 && uclient_http_redirect(cl)) {
96 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
103 switch (cl->status_code) {
106 output_fd = open_output_file(cl->url->location, true);
109 perror("Cannot open output file");
117 fprintf(stderr, "HTTP error %d\n", cl->status_code);
124 static void read_data_cb(struct uclient *cl)
133 len = uclient_read(cl, buf, sizeof(buf));
138 write(output_fd, buf, len);
142 static void msg_connecting(struct uclient *cl)
144 char addr[INET6_ADDRSTRLEN];
150 uclient_get_addr(addr, &port, &cl->remote_addr);
151 fprintf(stderr, "Connecting to %s:%d\n", addr, port);
154 static int init_request(struct uclient *cl)
160 rc = uclient_connect(cl);
166 rc = uclient_http_set_request_type(cl, "GET");
170 rc = uclient_request(cl);
177 static void eof_cb(struct uclient *cl)
181 fprintf(stderr, "Connection reset prematurely\n");
184 fprintf(stderr, "Download completed (%d bytes)\n", out_bytes);
189 static void handle_uclient_error(struct uclient *cl, int code)
191 const char *type = "Unknown error";
195 case UCLIENT_ERROR_CONNECT:
196 type = "Connection failed";
199 case UCLIENT_ERROR_TIMEDOUT:
200 type = "Connection timed out";
203 case UCLIENT_ERROR_SSL_INVALID_CERT:
204 type = "Invalid SSL certificate";
208 case UCLIENT_ERROR_SSL_CN_MISMATCH:
209 type = "Server hostname does not match SSL certificate";
219 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
227 static const struct uclient_cb cb = {
228 .header_done = header_done_cb,
229 .data_read = read_data_cb,
231 .error = handle_uclient_error,
234 static int usage(const char *progname)
237 "Usage: %s [options] <URL>\n"
239 " -q: Turn off status messages\n"
240 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
241 " --user=<user> HTTP authentication username\n"
242 " --password=<password> HTTP authentication password\n"
245 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
246 " --no-check-certificate: don't validate the server's certificate\n"
251 static void init_ca_cert(void)
256 glob("/etc/ssl/certs/*.crt", 0, NULL, &gl);
257 for (i = 0; i < gl.gl_pathc; i++)
258 ssl_ops->context_add_ca_crt_file(ssl_ctx, gl.gl_pathv[i]);
261 static void init_ustream_ssl(void)
265 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
269 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
273 ssl_ctx = ssl_ops->context_new(false);
276 static int no_ssl(const char *progname)
278 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
283 L_NO_CHECK_CERTIFICATE,
289 static const struct option longopts[] = {
290 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
291 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
292 [L_USER] = { "user", required_argument },
293 [L_PASSWORD] = { "password", required_argument },
297 int main(int argc, char **argv)
299 const char *progname = argv[0];
303 bool has_cert = false;
308 while ((ch = getopt_long(argc, argv, "qO:", longopts, &longopt_idx)) != -1) {
311 switch (longopt_idx) {
312 case L_NO_CHECK_CERTIFICATE:
315 case L_CA_CERTIFICATE:
318 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
323 username = strdup(optarg);
324 memset(optarg, '*', strlen(optarg));
329 password = strdup(optarg);
330 memset(optarg, '*', strlen(optarg));
333 return usage(progname);
337 output_file = optarg;
343 return usage(progname);
350 if (verify && !has_cert)
351 default_certs = true;
354 return usage(progname);
356 if (!strncmp(argv[0], "https", 5) && !ssl_ctx)
357 return no_ssl(progname);
363 asprintf(&auth_str, "%s:%s", username, password);
369 fprintf(stderr, "Downloading '%s'\n", argv[0]);
371 cl = uclient_new(argv[0], auth_str, &cb);
373 fprintf(stderr, "Failed to allocate uclient context\n");
379 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
382 rc = init_request(cl);
384 /* no error received, we can enter main loop */
387 fprintf(stderr, "Failed to establish connection\n");
395 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
399 ssl_ops->context_free(ssl_ctx);