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
;
53 static void request_done(struct uclient
*cl
);
55 static int open_output_file(const char *path
, bool create
)
62 flags
|= O_CREAT
| O_EXCL
;
65 if (!strcmp(output_file
, "-"))
69 fprintf(stderr
, "Writing to stdout\n");
72 return open(output_file
, flags
, 0644);
75 filename
= uclient_get_url_filename(path
, "index.html");
77 fprintf(stderr
, "Writing to '%s'\n", filename
);
78 ret
= open(filename
, flags
, 0644);
84 static void header_done_cb(struct uclient
*cl
)
88 if (retries
< 10 && uclient_http_redirect(cl
)) {
90 fprintf(stderr
, "Redirected to %s on %s\n", cl
->url
->location
, cl
->url
->host
);
97 switch (cl
->status_code
) {
100 output_fd
= open_output_file(cl
->url
->location
, true);
103 perror("Cannot open output file");
111 fprintf(stderr
, "HTTP error %d\n", cl
->status_code
);
118 static void read_data_cb(struct uclient
*cl
)
127 len
= uclient_read(cl
, buf
, sizeof(buf
));
132 write(output_fd
, buf
, len
);
136 static void msg_connecting(struct uclient
*cl
)
138 char addr
[INET6_ADDRSTRLEN
];
144 uclient_get_addr(addr
, &port
, &cl
->remote_addr
);
145 fprintf(stderr
, "Connecting to %s:%d\n", addr
, port
);
148 static int init_request(struct uclient
*cl
)
153 uclient_http_set_ssl_ctx(cl
, ssl_ops
, ssl_ctx
, verify
);
155 rc
= uclient_connect(cl
);
161 rc
= uclient_http_set_request_type(cl
, "GET");
165 rc
= uclient_request(cl
);
172 static void request_done(struct uclient
*cl
)
175 uclient_set_url(cl
, *urls
, auth_str
);
177 error_ret
= init_request(cl
);
182 if (output_fd
>= 0 && !output_file
) {
186 uclient_disconnect(cl
);
191 static void eof_cb(struct uclient
*cl
)
195 fprintf(stderr
, "Connection reset prematurely\n");
198 fprintf(stderr
, "Download completed (%d bytes)\n", out_bytes
);
203 static void handle_uclient_error(struct uclient
*cl
, int code
)
205 const char *type
= "Unknown error";
209 case UCLIENT_ERROR_CONNECT
:
210 type
= "Connection failed";
213 case UCLIENT_ERROR_TIMEDOUT
:
214 type
= "Connection timed out";
217 case UCLIENT_ERROR_SSL_INVALID_CERT
:
218 type
= "Invalid SSL certificate";
222 case UCLIENT_ERROR_SSL_CN_MISMATCH
:
223 type
= "Server hostname does not match SSL certificate";
233 fprintf(stderr
, "Connection error: %s%s\n", type
, ignore
? " (ignored)" : "");
241 static const struct uclient_cb cb
= {
242 .header_done
= header_done_cb
,
243 .data_read
= read_data_cb
,
245 .error
= handle_uclient_error
,
248 static int usage(const char *progname
)
251 "Usage: %s [options] <URL>\n"
253 " -q: Turn off status messages\n"
254 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
255 " --user=<user> HTTP authentication username\n"
256 " --password=<password> HTTP authentication password\n"
259 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
260 " --no-check-certificate: don't validate the server's certificate\n"
265 static void init_ca_cert(void)
270 glob("/etc/ssl/certs/*.crt", 0, NULL
, &gl
);
271 for (i
= 0; i
< gl
.gl_pathc
; i
++)
272 ssl_ops
->context_add_ca_crt_file(ssl_ctx
, gl
.gl_pathv
[i
]);
275 static void init_ustream_ssl(void)
279 dlh
= dlopen("libustream-ssl." LIB_EXT
, RTLD_LAZY
| RTLD_LOCAL
);
283 ssl_ops
= dlsym(dlh
, "ustream_ssl_ops");
287 ssl_ctx
= ssl_ops
->context_new(false);
290 static int no_ssl(const char *progname
)
292 fprintf(stderr
, "%s: SSL support not available, please install ustream-ssl\n", progname
);
297 L_NO_CHECK_CERTIFICATE
,
303 static const struct option longopts
[] = {
304 [L_NO_CHECK_CERTIFICATE
] = { "no-check-certificate", no_argument
},
305 [L_CA_CERTIFICATE
] = { "ca-certificate", required_argument
},
306 [L_USER
] = { "user", required_argument
},
307 [L_PASSWORD
] = { "password", required_argument
},
313 int main(int argc
, char **argv
)
315 const char *progname
= argv
[0];
318 bool has_cert
= false;
324 while ((ch
= getopt_long(argc
, argv
, "qO:", longopts
, &longopt_idx
)) != -1) {
327 switch (longopt_idx
) {
328 case L_NO_CHECK_CERTIFICATE
:
331 case L_CA_CERTIFICATE
:
334 ssl_ops
->context_add_ca_crt_file(ssl_ctx
, optarg
);
339 username
= strdup(optarg
);
340 memset(optarg
, '*', strlen(optarg
));
345 password
= strdup(optarg
);
346 memset(optarg
, '*', strlen(optarg
));
349 return usage(progname
);
353 output_file
= optarg
;
359 return usage(progname
);
366 if (verify
&& !has_cert
)
367 default_certs
= true;
370 return usage(progname
);
373 for (i
= 0; i
< argc
; i
++) {
374 if (!strncmp(argv
[i
], "https", 5))
375 return no_ssl(progname
);
386 asprintf(&auth_str
, "%s:%s", username
, password
);
392 fprintf(stderr
, "Downloading '%s'\n", argv
[0]);
394 cl
= uclient_new(argv
[0], auth_str
, &cb
);
396 fprintf(stderr
, "Failed to allocate uclient context\n");
403 rc
= init_request(cl
);
405 /* no error received, we can enter main loop */
408 fprintf(stderr
, "Failed to establish connection\n");
416 if (output_fd
>= 0 && output_fd
!= STDOUT_FILENO
)
420 ssl_ops
->context_free(ssl_ctx
);