1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include <getopt.h>
4 #include <unistd.h>
5
6 #include "sd-daemon.h"
7
8 #include "conf-parser.h"
9 #include "daemon-util.h"
10 #include "def.h"
11 #include "fd-util.h"
12 #include "fileio.h"
13 #include "journal-remote-write.h"
14 #include "journal-remote.h"
15 #include "main-func.h"
16 #include "memory-util.h"
17 #include "parse-argument.h"
18 #include "pretty-print.h"
19 #include "process-util.h"
20 #include "rlimit-util.h"
21 #include "signal-util.h"
22 #include "socket-netlink.h"
23 #include "socket-util.h"
24 #include "stat-util.h"
25 #include "string-table.h"
26 #include "strv.h"
27
28 #define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-remote.pem"
29 #define CERT_FILE CERTIFICATE_ROOT "/certs/journal-remote.pem"
30 #define TRUST_FILE CERTIFICATE_ROOT "/ca/trusted.pem"
31
32 static const char* arg_url = NULL;
33 static const char* arg_getter = NULL;
34 static const char* arg_listen_raw = NULL;
35 static const char* arg_listen_http = NULL;
36 static const char* arg_listen_https = NULL;
37 static char** arg_files = NULL; /* Do not free this. */
38 static bool arg_compress = true;
39 static bool arg_seal = false;
40 static int http_socket = -1, https_socket = -1;
41 static char** arg_gnutls_log = NULL;
42
43 static JournalWriteSplitMode arg_split_mode = _JOURNAL_WRITE_SPLIT_INVALID;
44 static const char* arg_output = NULL;
45
46 static char *arg_key = NULL;
47 static char *arg_cert = NULL;
48 static char *arg_trust = NULL;
49 #if HAVE_GNUTLS
50 static bool arg_trust_all = false;
51 #else
52 static bool arg_trust_all = true;
53 #endif
54
55 STATIC_DESTRUCTOR_REGISTER(arg_gnutls_log, strv_freep);
56 STATIC_DESTRUCTOR_REGISTER(arg_key, freep);
57 STATIC_DESTRUCTOR_REGISTER(arg_cert, freep);
58 STATIC_DESTRUCTOR_REGISTER(arg_trust, freep);
59
60 static const char* const journal_write_split_mode_table[_JOURNAL_WRITE_SPLIT_MAX] = {
61 [JOURNAL_WRITE_SPLIT_NONE] = "none",
62 [JOURNAL_WRITE_SPLIT_HOST] = "host",
63 };
64
65 DEFINE_PRIVATE_STRING_TABLE_LOOKUP(journal_write_split_mode, JournalWriteSplitMode);
66 static DEFINE_CONFIG_PARSE_ENUM(config_parse_write_split_mode,
67 journal_write_split_mode,
68 JournalWriteSplitMode,
69 "Failed to parse split mode setting");
70
71 /**********************************************************************
72 **********************************************************************
73 **********************************************************************/
74
spawn_child(const char * child,char ** argv)75 static int spawn_child(const char* child, char** argv) {
76 pid_t child_pid;
77 int fd[2], r;
78
79 if (pipe(fd) < 0)
80 return log_error_errno(errno, "Failed to create pager pipe: %m");
81
82 r = safe_fork("(remote)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &child_pid);
83 if (r < 0) {
84 safe_close_pair(fd);
85 return r;
86 }
87
88 /* In the child */
89 if (r == 0) {
90 fd[0] = safe_close(fd[0]);
91
92 r = rearrange_stdio(STDIN_FILENO, TAKE_FD(fd[1]), STDERR_FILENO);
93 if (r < 0) {
94 log_error_errno(r, "Failed to dup pipe to stdout: %m");
95 _exit(EXIT_FAILURE);
96 }
97
98 (void) rlimit_nofile_safe();
99
100 execvp(child, argv);
101 log_error_errno(errno, "Failed to exec child %s: %m", child);
102 _exit(EXIT_FAILURE);
103 }
104
105 safe_close(fd[1]);
106
107 r = fd_nonblock(fd[0], true);
108 if (r < 0)
109 log_warning_errno(errno, "Failed to set child pipe to non-blocking: %m");
110
111 return fd[0];
112 }
113
spawn_curl(const char * url)114 static int spawn_curl(const char* url) {
115 char **argv = STRV_MAKE("curl",
116 "-HAccept: application/vnd.fdo.journal",
117 "--silent",
118 "--show-error",
119 url);
120 int r;
121
122 r = spawn_child("curl", argv);
123 if (r < 0)
124 log_error_errno(r, "Failed to spawn curl: %m");
125 return r;
126 }
127
spawn_getter(const char * getter)128 static int spawn_getter(const char *getter) {
129 int r;
130 _cleanup_strv_free_ char **words = NULL;
131
132 assert(getter);
133 r = strv_split_full(&words, getter, WHITESPACE, EXTRACT_UNQUOTE);
134 if (r < 0)
135 return log_error_errno(r, "Failed to split getter option: %m");
136
137 r = spawn_child(words[0], words);
138 if (r < 0)
139 log_error_errno(r, "Failed to spawn getter %s: %m", getter);
140
141 return r;
142 }
143
144 /**********************************************************************
145 **********************************************************************
146 **********************************************************************/
147
148 static int null_timer_event_handler(sd_event_source *s,
149 uint64_t usec,
150 void *userdata);
151 static int dispatch_http_event(sd_event_source *event,
152 int fd,
153 uint32_t revents,
154 void *userdata);
155
request_meta(void ** connection_cls,int fd,char * hostname)156 static int request_meta(void **connection_cls, int fd, char *hostname) {
157 RemoteSource *source;
158 Writer *writer;
159 int r;
160
161 assert(connection_cls);
162 if (*connection_cls)
163 return 0;
164
165 r = journal_remote_get_writer(journal_remote_server_global, hostname, &writer);
166 if (r < 0)
167 return log_warning_errno(r, "Failed to get writer for source %s: %m",
168 hostname);
169
170 source = source_new(fd, true, hostname, writer);
171 if (!source) {
172 writer_unref(writer);
173 return log_oom();
174 }
175
176 log_debug("Added RemoteSource as connection metadata %p", source);
177
178 *connection_cls = source;
179 return 0;
180 }
181
request_meta_free(void * cls,struct MHD_Connection * connection,void ** connection_cls,enum MHD_RequestTerminationCode toe)182 static void request_meta_free(void *cls,
183 struct MHD_Connection *connection,
184 void **connection_cls,
185 enum MHD_RequestTerminationCode toe) {
186 RemoteSource *s;
187
188 assert(connection_cls);
189 s = *connection_cls;
190
191 if (s) {
192 log_debug("Cleaning up connection metadata %p", s);
193 source_free(s);
194 *connection_cls = NULL;
195 }
196 }
197
process_http_upload(struct MHD_Connection * connection,const char * upload_data,size_t * upload_data_size,RemoteSource * source)198 static int process_http_upload(
199 struct MHD_Connection *connection,
200 const char *upload_data,
201 size_t *upload_data_size,
202 RemoteSource *source) {
203
204 bool finished = false;
205 size_t remaining;
206 int r;
207
208 assert(source);
209
210 log_trace("%s: connection %p, %zu bytes",
211 __func__, connection, *upload_data_size);
212
213 if (*upload_data_size) {
214 log_trace("Received %zu bytes", *upload_data_size);
215
216 r = journal_importer_push_data(&source->importer,
217 upload_data, *upload_data_size);
218 if (r < 0)
219 return mhd_respond_oom(connection);
220
221 *upload_data_size = 0;
222 } else
223 finished = true;
224
225 for (;;) {
226 r = process_source(source, journal_remote_server_global->file_flags);
227 if (r == -EAGAIN)
228 break;
229 if (r < 0) {
230 if (r == -ENOBUFS)
231 log_warning_errno(r, "Entry is above the maximum of %u, aborting connection %p.",
232 DATA_SIZE_MAX, connection);
233 else if (r == -E2BIG)
234 log_warning_errno(r, "Entry with more fields than the maximum of %u, aborting connection %p.",
235 ENTRY_FIELD_COUNT_MAX, connection);
236 else
237 log_warning_errno(r, "Failed to process data, aborting connection %p: %m",
238 connection);
239 return MHD_NO;
240 }
241 }
242
243 if (!finished)
244 return MHD_YES;
245
246 /* The upload is finished */
247
248 remaining = journal_importer_bytes_remaining(&source->importer);
249 if (remaining > 0) {
250 log_warning("Premature EOF byte. %zu bytes lost.", remaining);
251 return mhd_respondf(connection,
252 0, MHD_HTTP_EXPECTATION_FAILED,
253 "Premature EOF. %zu bytes of trailing data not processed.",
254 remaining);
255 }
256
257 return mhd_respond(connection, MHD_HTTP_ACCEPTED, "OK.");
258 };
259
request_handler(void * cls,struct MHD_Connection * connection,const char * url,const char * method,const char * version,const char * upload_data,size_t * upload_data_size,void ** connection_cls)260 static mhd_result request_handler(
261 void *cls,
262 struct MHD_Connection *connection,
263 const char *url,
264 const char *method,
265 const char *version,
266 const char *upload_data,
267 size_t *upload_data_size,
268 void **connection_cls) {
269
270 const char *header;
271 int r, code, fd;
272 _cleanup_free_ char *hostname = NULL;
273 bool chunked = false;
274
275 assert(connection);
276 assert(connection_cls);
277 assert(url);
278 assert(method);
279
280 log_trace("Handling a connection %s %s %s", method, url, version);
281
282 if (*connection_cls)
283 return process_http_upload(connection,
284 upload_data, upload_data_size,
285 *connection_cls);
286
287 if (!streq(method, "POST"))
288 return mhd_respond(connection, MHD_HTTP_NOT_ACCEPTABLE, "Unsupported method.");
289
290 if (!streq(url, "/upload"))
291 return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found.");
292
293 header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Content-Type");
294 if (!header || !streq(header, "application/vnd.fdo.journal"))
295 return mhd_respond(connection, MHD_HTTP_UNSUPPORTED_MEDIA_TYPE,
296 "Content-Type: application/vnd.fdo.journal is required.");
297
298 header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Transfer-Encoding");
299 if (header) {
300 if (!strcaseeq(header, "chunked"))
301 return mhd_respondf(connection, 0, MHD_HTTP_BAD_REQUEST,
302 "Unsupported Transfer-Encoding type: %s", header);
303
304 chunked = true;
305 }
306
307 header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Content-Length");
308 if (header) {
309 size_t len;
310
311 if (chunked)
312 return mhd_respond(connection, MHD_HTTP_BAD_REQUEST,
313 "Content-Length must not specified when Transfer-Encoding type is 'chuncked'");
314
315 r = safe_atozu(header, &len);
316 if (r < 0)
317 return mhd_respondf(connection, r, MHD_HTTP_LENGTH_REQUIRED,
318 "Content-Length: %s cannot be parsed: %m", header);
319
320 if (len > ENTRY_SIZE_MAX)
321 /* When serialized, an entry of maximum size might be slightly larger,
322 * so this does not correspond exactly to the limit in journald. Oh well.
323 */
324 return mhd_respondf(connection, 0, MHD_HTTP_CONTENT_TOO_LARGE,
325 "Payload larger than maximum size of %u bytes", ENTRY_SIZE_MAX);
326 }
327
328 {
329 const union MHD_ConnectionInfo *ci;
330
331 ci = MHD_get_connection_info(connection,
332 MHD_CONNECTION_INFO_CONNECTION_FD);
333 if (!ci) {
334 log_error("MHD_get_connection_info failed: cannot get remote fd");
335 return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR,
336 "Cannot check remote address.");
337 }
338
339 fd = ci->connect_fd;
340 assert(fd >= 0);
341 }
342
343 if (journal_remote_server_global->check_trust) {
344 r = check_permissions(connection, &code, &hostname);
345 if (r < 0)
346 return code;
347 } else {
348 r = getpeername_pretty(fd, false, &hostname);
349 if (r < 0)
350 return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR,
351 "Cannot check remote hostname.");
352 }
353
354 assert(hostname);
355
356 r = request_meta(connection_cls, fd, hostname);
357 if (r == -ENOMEM)
358 return respond_oom(connection);
359 else if (r < 0)
360 return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "%m");
361
362 hostname = NULL;
363 return MHD_YES;
364 }
365
setup_microhttpd_server(RemoteServer * s,int fd,const char * key,const char * cert,const char * trust)366 static int setup_microhttpd_server(RemoteServer *s,
367 int fd,
368 const char *key,
369 const char *cert,
370 const char *trust) {
371 struct MHD_OptionItem opts[] = {
372 { MHD_OPTION_NOTIFY_COMPLETED, (intptr_t) request_meta_free},
373 { MHD_OPTION_EXTERNAL_LOGGER, (intptr_t) microhttpd_logger},
374 { MHD_OPTION_LISTEN_SOCKET, fd},
375 { MHD_OPTION_CONNECTION_MEMORY_LIMIT, 128*1024},
376 { MHD_OPTION_END},
377 { MHD_OPTION_END},
378 { MHD_OPTION_END},
379 { MHD_OPTION_END},
380 { MHD_OPTION_END}};
381 int opts_pos = 4;
382 int flags =
383 MHD_USE_DEBUG |
384 MHD_USE_DUAL_STACK |
385 MHD_USE_EPOLL |
386 MHD_USE_ITC;
387
388 const union MHD_DaemonInfo *info;
389 int r, epoll_fd;
390 MHDDaemonWrapper *d;
391
392 assert(fd >= 0);
393
394 r = fd_nonblock(fd, true);
395 if (r < 0)
396 return log_error_errno(r, "Failed to make fd:%d nonblocking: %m", fd);
397
398 /* MHD_OPTION_STRICT_FOR_CLIENT is introduced in microhttpd 0.9.54,
399 * and MHD_USE_PEDANTIC_CHECKS will be deprecated in future.
400 * If MHD_USE_PEDANTIC_CHECKS is '#define'd, then it is deprecated
401 * and we should use MHD_OPTION_STRICT_FOR_CLIENT. On the other hand,
402 * if MHD_USE_PEDANTIC_CHECKS is not '#define'd, then it is not
403 * deprecated yet and there exists an enum element with the same name.
404 * So we can safely use it. */
405 #ifdef MHD_USE_PEDANTIC_CHECKS
406 opts[opts_pos++] = (struct MHD_OptionItem)
407 {MHD_OPTION_STRICT_FOR_CLIENT, 1};
408 #else
409 flags |= MHD_USE_PEDANTIC_CHECKS;
410 #endif
411
412 if (key) {
413 assert(cert);
414
415 opts[opts_pos++] = (struct MHD_OptionItem)
416 {MHD_OPTION_HTTPS_MEM_KEY, 0, (char*) key};
417 opts[opts_pos++] = (struct MHD_OptionItem)
418 {MHD_OPTION_HTTPS_MEM_CERT, 0, (char*) cert};
419
420 flags |= MHD_USE_TLS;
421
422 if (trust)
423 opts[opts_pos++] = (struct MHD_OptionItem)
424 {MHD_OPTION_HTTPS_MEM_TRUST, 0, (char*) trust};
425 }
426
427 d = new(MHDDaemonWrapper, 1);
428 if (!d)
429 return log_oom();
430
431 d->fd = (uint64_t) fd;
432
433 d->daemon = MHD_start_daemon(flags, 0,
434 NULL, NULL,
435 request_handler, NULL,
436 MHD_OPTION_ARRAY, opts,
437 MHD_OPTION_END);
438 if (!d->daemon) {
439 log_error("Failed to start µhttp daemon");
440 r = -EINVAL;
441 goto error;
442 }
443
444 log_debug("Started MHD %s daemon on fd:%d (wrapper @ %p)",
445 key ? "HTTPS" : "HTTP", fd, d);
446
447 info = MHD_get_daemon_info(d->daemon, MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY);
448 if (!info) {
449 log_error("µhttp returned NULL daemon info");
450 r = -EOPNOTSUPP;
451 goto error;
452 }
453
454 epoll_fd = info->listen_fd;
455 if (epoll_fd < 0) {
456 log_error("µhttp epoll fd is invalid");
457 r = -EUCLEAN;
458 goto error;
459 }
460
461 r = sd_event_add_io(s->events, &d->io_event,
462 epoll_fd, EPOLLIN,
463 dispatch_http_event, d);
464 if (r < 0) {
465 log_error_errno(r, "Failed to add event callback: %m");
466 goto error;
467 }
468
469 r = sd_event_source_set_description(d->io_event, "io_event");
470 if (r < 0) {
471 log_error_errno(r, "Failed to set source name: %m");
472 goto error;
473 }
474
475 r = sd_event_add_time(s->events, &d->timer_event,
476 CLOCK_MONOTONIC, UINT64_MAX, 0,
477 null_timer_event_handler, d);
478 if (r < 0) {
479 log_error_errno(r, "Failed to add timer_event: %m");
480 goto error;
481 }
482
483 r = sd_event_source_set_description(d->timer_event, "timer_event");
484 if (r < 0) {
485 log_error_errno(r, "Failed to set source name: %m");
486 goto error;
487 }
488
489 r = hashmap_ensure_put(&s->daemons, &uint64_hash_ops, &d->fd, d);
490 if (r == -ENOMEM) {
491 log_oom();
492 goto error;
493 }
494 if (r < 0) {
495 log_error_errno(r, "Failed to add daemon to hashmap: %m");
496 goto error;
497 }
498
499 s->active++;
500 return 0;
501
502 error:
503 MHD_stop_daemon(d->daemon);
504 free(d->daemon);
505 free(d);
506 return r;
507 }
508
setup_microhttpd_socket(RemoteServer * s,const char * address,const char * key,const char * cert,const char * trust)509 static int setup_microhttpd_socket(RemoteServer *s,
510 const char *address,
511 const char *key,
512 const char *cert,
513 const char *trust) {
514 int fd;
515
516 fd = make_socket_fd(LOG_DEBUG, address, SOCK_STREAM, SOCK_CLOEXEC);
517 if (fd < 0)
518 return fd;
519
520 return setup_microhttpd_server(s, fd, key, cert, trust);
521 }
522
null_timer_event_handler(sd_event_source * timer_event,uint64_t usec,void * userdata)523 static int null_timer_event_handler(sd_event_source *timer_event,
524 uint64_t usec,
525 void *userdata) {
526 return dispatch_http_event(timer_event, 0, 0, userdata);
527 }
528
dispatch_http_event(sd_event_source * event,int fd,uint32_t revents,void * userdata)529 static int dispatch_http_event(sd_event_source *event,
530 int fd,
531 uint32_t revents,
532 void *userdata) {
533 MHDDaemonWrapper *d = userdata;
534 int r;
535 MHD_UNSIGNED_LONG_LONG timeout = ULLONG_MAX;
536
537 assert(d);
538
539 r = MHD_run(d->daemon);
540 if (r == MHD_NO)
541 // FIXME: unregister daemon
542 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
543 "MHD_run failed!");
544 if (MHD_get_timeout(d->daemon, &timeout) == MHD_NO)
545 timeout = ULLONG_MAX;
546
547 r = sd_event_source_set_time(d->timer_event, timeout);
548 if (r < 0) {
549 log_warning_errno(r, "Unable to set event loop timeout: %m, this may result in indefinite blocking!");
550 return 1;
551 }
552
553 r = sd_event_source_set_enabled(d->timer_event, SD_EVENT_ON);
554 if (r < 0)
555 log_warning_errno(r, "Unable to enable timer_event: %m, this may result in indefinite blocking!");
556
557 return 1; /* work to do */
558 }
559
560 /**********************************************************************
561 **********************************************************************
562 **********************************************************************/
563
setup_signals(RemoteServer * s)564 static int setup_signals(RemoteServer *s) {
565 int r;
566
567 assert(s);
568
569 assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0);
570
571 r = sd_event_add_signal(s->events, &s->sigterm_event, SIGTERM, NULL, s);
572 if (r < 0)
573 return r;
574
575 r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, NULL, s);
576 if (r < 0)
577 return r;
578
579 return 0;
580 }
581
setup_raw_socket(RemoteServer * s,const char * address)582 static int setup_raw_socket(RemoteServer *s, const char *address) {
583 int fd;
584
585 fd = make_socket_fd(LOG_INFO, address, SOCK_STREAM, SOCK_CLOEXEC);
586 if (fd < 0)
587 return fd;
588
589 return journal_remote_add_raw_socket(s, fd);
590 }
591
create_remoteserver(RemoteServer * s,const char * key,const char * cert,const char * trust)592 static int create_remoteserver(
593 RemoteServer *s,
594 const char* key,
595 const char* cert,
596 const char* trust) {
597
598 int r, n, fd;
599
600 r = journal_remote_server_init(
601 s,
602 arg_output,
603 arg_split_mode,
604 (arg_compress ? JOURNAL_COMPRESS : 0) |
605 (arg_seal ? JOURNAL_SEAL : 0));
606 if (r < 0)
607 return r;
608
609 r = setup_signals(s);
610 if (r < 0)
611 return log_error_errno(r, "Failed to set up signals: %m");
612
613 n = sd_listen_fds(true);
614 if (n < 0)
615 return log_error_errno(n, "Failed to read listening file descriptors from environment: %m");
616 else
617 log_debug("Received %d descriptors", n);
618
619 if (MAX(http_socket, https_socket) >= SD_LISTEN_FDS_START + n)
620 return log_error_errno(SYNTHETIC_ERRNO(EBADFD),
621 "Received fewer sockets than expected");
622
623 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
624 if (sd_is_socket(fd, AF_UNSPEC, 0, true)) {
625 log_debug("Received a listening socket (fd:%d)", fd);
626
627 if (fd == http_socket)
628 r = setup_microhttpd_server(s, fd, NULL, NULL, NULL);
629 else if (fd == https_socket)
630 r = setup_microhttpd_server(s, fd, key, cert, trust);
631 else
632 r = journal_remote_add_raw_socket(s, fd);
633 } else if (sd_is_socket(fd, AF_UNSPEC, 0, false)) {
634 char *hostname;
635
636 r = getpeername_pretty(fd, false, &hostname);
637 if (r < 0)
638 return log_error_errno(r, "Failed to retrieve remote name: %m");
639
640 log_debug("Received a connection socket (fd:%d) from %s", fd, hostname);
641
642 r = journal_remote_add_source(s, fd, hostname, true);
643 } else
644 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
645 "Unknown socket passed on fd:%d", fd);
646
647 if (r < 0)
648 return log_error_errno(r, "Failed to register socket (fd:%d): %m", fd);
649 }
650
651 if (arg_getter) {
652 log_info("Spawning getter %s...", arg_getter);
653 fd = spawn_getter(arg_getter);
654 if (fd < 0)
655 return fd;
656
657 r = journal_remote_add_source(s, fd, (char*) arg_output, false);
658 if (r < 0)
659 return r;
660 }
661
662 if (arg_url) {
663 const char *url, *hostname;
664
665 if (!strstr(arg_url, "/entries")) {
666 if (endswith(arg_url, "/"))
667 url = strjoina(arg_url, "entries");
668 else
669 url = strjoina(arg_url, "/entries");
670 } else
671 url = strdupa_safe(arg_url);
672
673 log_info("Spawning curl %s...", url);
674 fd = spawn_curl(url);
675 if (fd < 0)
676 return fd;
677
678 hostname = STARTSWITH_SET(arg_url, "https://", "http://");
679 if (!hostname)
680 hostname = arg_url;
681
682 hostname = strndupa_safe(hostname, strcspn(hostname, "/:"));
683
684 r = journal_remote_add_source(s, fd, (char *) hostname, false);
685 if (r < 0)
686 return r;
687 }
688
689 if (arg_listen_raw) {
690 log_debug("Listening on a socket...");
691 r = setup_raw_socket(s, arg_listen_raw);
692 if (r < 0)
693 return r;
694 }
695
696 if (arg_listen_http) {
697 r = setup_microhttpd_socket(s, arg_listen_http, NULL, NULL, NULL);
698 if (r < 0)
699 return r;
700 }
701
702 if (arg_listen_https) {
703 r = setup_microhttpd_socket(s, arg_listen_https, key, cert, trust);
704 if (r < 0)
705 return r;
706 }
707
708 STRV_FOREACH(file, arg_files) {
709 const char *output_name;
710
711 if (streq(*file, "-")) {
712 log_debug("Using standard input as source.");
713
714 fd = STDIN_FILENO;
715 output_name = "stdin";
716 } else {
717 log_debug("Reading file %s...", *file);
718
719 fd = open(*file, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
720 if (fd < 0)
721 return log_error_errno(errno, "Failed to open %s: %m", *file);
722 output_name = *file;
723 }
724
725 r = journal_remote_add_source(s, fd, (char*) output_name, false);
726 if (r < 0)
727 return r;
728 }
729
730 if (s->active == 0)
731 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
732 "Zero sources specified");
733
734 if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE) {
735 /* In this case we know what the writer will be
736 called, so we can create it and verify that we can
737 create output as expected. */
738 r = journal_remote_get_writer(s, NULL, &s->_single_writer);
739 if (r < 0)
740 return r;
741 }
742
743 return 0;
744 }
745
negative_fd(const char * spec)746 static int negative_fd(const char *spec) {
747 /* Return a non-positive number as its inverse, -EINVAL otherwise. */
748
749 int fd, r;
750
751 r = safe_atoi(spec, &fd);
752 if (r < 0)
753 return r;
754
755 if (fd > 0)
756 return -EINVAL;
757 else
758 return -fd;
759 }
760
parse_config(void)761 static int parse_config(void) {
762 const ConfigTableItem items[] = {
763 { "Remote", "Seal", config_parse_bool, 0, &arg_seal },
764 { "Remote", "SplitMode", config_parse_write_split_mode, 0, &arg_split_mode },
765 { "Remote", "ServerKeyFile", config_parse_path, 0, &arg_key },
766 { "Remote", "ServerCertificateFile", config_parse_path, 0, &arg_cert },
767 { "Remote", "TrustedCertificateFile", config_parse_path, 0, &arg_trust },
768 {}
769 };
770
771 return config_parse_many_nulstr(
772 PKGSYSCONFDIR "/journal-remote.conf",
773 CONF_PATHS_NULSTR("systemd/journal-remote.conf.d"),
774 "Remote\0",
775 config_item_table_lookup, items,
776 CONFIG_PARSE_WARN,
777 NULL,
778 NULL);
779 }
780
help(void)781 static int help(void) {
782 _cleanup_free_ char *link = NULL;
783 int r;
784
785 r = terminal_urlify_man("systemd-journal-remote.service", "8", &link);
786 if (r < 0)
787 return log_oom();
788
789 printf("%s [OPTIONS...] {FILE|-}...\n\n"
790 "Write external journal events to journal file(s).\n\n"
791 " -h --help Show this help\n"
792 " --version Show package version\n"
793 " --url=URL Read events from systemd-journal-gatewayd at URL\n"
794 " --getter=COMMAND Read events from the output of COMMAND\n"
795 " --listen-raw=ADDR Listen for connections at ADDR\n"
796 " --listen-http=ADDR Listen for HTTP connections at ADDR\n"
797 " --listen-https=ADDR Listen for HTTPS connections at ADDR\n"
798 " -o --output=FILE|DIR Write output to FILE or DIR/external-*.journal\n"
799 " --compress[=BOOL] Use compression in the output journal (default: yes)\n"
800 " --seal[=BOOL] Use event sealing (default: no)\n"
801 " --key=FILENAME SSL key in PEM format (default:\n"
802 " \"" PRIV_KEY_FILE "\")\n"
803 " --cert=FILENAME SSL certificate in PEM format (default:\n"
804 " \"" CERT_FILE "\")\n"
805 " --trust=FILENAME|all SSL CA certificate or disable checking (default:\n"
806 " \"" TRUST_FILE "\")\n"
807 " --gnutls-log=CATEGORY...\n"
808 " Specify a list of gnutls logging categories\n"
809 " --split-mode=none|host How many output files to create\n"
810 "\nNote: file descriptors from sd_listen_fds() will be consumed, too.\n"
811 "\nSee the %s for details.\n",
812 program_invocation_short_name,
813 link);
814
815 return 0;
816 }
817
parse_argv(int argc,char * argv[])818 static int parse_argv(int argc, char *argv[]) {
819 enum {
820 ARG_VERSION = 0x100,
821 ARG_URL,
822 ARG_LISTEN_RAW,
823 ARG_LISTEN_HTTP,
824 ARG_LISTEN_HTTPS,
825 ARG_GETTER,
826 ARG_SPLIT_MODE,
827 ARG_COMPRESS,
828 ARG_SEAL,
829 ARG_KEY,
830 ARG_CERT,
831 ARG_TRUST,
832 ARG_GNUTLS_LOG,
833 };
834
835 static const struct option options[] = {
836 { "help", no_argument, NULL, 'h' },
837 { "version", no_argument, NULL, ARG_VERSION },
838 { "url", required_argument, NULL, ARG_URL },
839 { "getter", required_argument, NULL, ARG_GETTER },
840 { "listen-raw", required_argument, NULL, ARG_LISTEN_RAW },
841 { "listen-http", required_argument, NULL, ARG_LISTEN_HTTP },
842 { "listen-https", required_argument, NULL, ARG_LISTEN_HTTPS },
843 { "output", required_argument, NULL, 'o' },
844 { "split-mode", required_argument, NULL, ARG_SPLIT_MODE },
845 { "compress", optional_argument, NULL, ARG_COMPRESS },
846 { "seal", optional_argument, NULL, ARG_SEAL },
847 { "key", required_argument, NULL, ARG_KEY },
848 { "cert", required_argument, NULL, ARG_CERT },
849 { "trust", required_argument, NULL, ARG_TRUST },
850 { "gnutls-log", required_argument, NULL, ARG_GNUTLS_LOG },
851 {}
852 };
853
854 int c, r;
855 bool type_a, type_b;
856
857 assert(argc >= 0);
858 assert(argv);
859
860 while ((c = getopt_long(argc, argv, "ho:", options, NULL)) >= 0)
861 switch (c) {
862
863 case 'h':
864 return help();
865
866 case ARG_VERSION:
867 return version();
868
869 case ARG_URL:
870 if (arg_url)
871 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
872 "cannot currently set more than one --url");
873
874 arg_url = optarg;
875 break;
876
877 case ARG_GETTER:
878 if (arg_getter)
879 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
880 "cannot currently use --getter more than once");
881
882 arg_getter = optarg;
883 break;
884
885 case ARG_LISTEN_RAW:
886 if (arg_listen_raw)
887 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
888 "cannot currently use --listen-raw more than once");
889
890 arg_listen_raw = optarg;
891 break;
892
893 case ARG_LISTEN_HTTP:
894 if (arg_listen_http || http_socket >= 0)
895 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
896 "cannot currently use --listen-http more than once");
897
898 r = negative_fd(optarg);
899 if (r >= 0)
900 http_socket = r;
901 else
902 arg_listen_http = optarg;
903 break;
904
905 case ARG_LISTEN_HTTPS:
906 if (arg_listen_https || https_socket >= 0)
907 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
908 "cannot currently use --listen-https more than once");
909
910 r = negative_fd(optarg);
911 if (r >= 0)
912 https_socket = r;
913 else
914 arg_listen_https = optarg;
915
916 break;
917
918 case ARG_KEY:
919 if (arg_key)
920 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
921 "Key file specified twice");
922
923 arg_key = strdup(optarg);
924 if (!arg_key)
925 return log_oom();
926
927 break;
928
929 case ARG_CERT:
930 if (arg_cert)
931 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
932 "Certificate file specified twice");
933
934 arg_cert = strdup(optarg);
935 if (!arg_cert)
936 return log_oom();
937
938 break;
939
940 case ARG_TRUST:
941 #if HAVE_GNUTLS
942 if (arg_trust || arg_trust_all)
943 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
944 "Confusing trusted CA configuration");
945
946 if (streq(optarg, "all"))
947 arg_trust_all = true;
948 else {
949 arg_trust = strdup(optarg);
950 if (!arg_trust)
951 return log_oom();
952 }
953 #else
954 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
955 "Option --trust is not available.");
956 #endif
957 break;
958
959 case 'o':
960 if (arg_output)
961 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
962 "cannot use --output/-o more than once");
963
964 arg_output = optarg;
965 break;
966
967 case ARG_SPLIT_MODE:
968 arg_split_mode = journal_write_split_mode_from_string(optarg);
969 if (arg_split_mode == _JOURNAL_WRITE_SPLIT_INVALID)
970 return log_error_errno(arg_split_mode, "Invalid split mode: %s", optarg);
971 break;
972
973 case ARG_COMPRESS:
974 r = parse_boolean_argument("--compress", optarg, &arg_compress);
975 if (r < 0)
976 return r;
977 break;
978
979 case ARG_SEAL:
980 r = parse_boolean_argument("--seal", optarg, &arg_seal);
981 if (r < 0)
982 return r;
983 break;
984
985 case ARG_GNUTLS_LOG:
986 #if HAVE_GNUTLS
987 for (const char* p = optarg;;) {
988 _cleanup_free_ char *word = NULL;
989
990 r = extract_first_word(&p, &word, ",", 0);
991 if (r < 0)
992 return log_error_errno(r, "Failed to parse --gnutls-log= argument: %m");
993 if (r == 0)
994 break;
995
996 if (strv_push(&arg_gnutls_log, word) < 0)
997 return log_oom();
998
999 word = NULL;
1000 }
1001 break;
1002 #else
1003 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1004 "Option --gnutls-log is not available.");
1005 #endif
1006
1007 case '?':
1008 return -EINVAL;
1009
1010 default:
1011 assert_not_reached();
1012 }
1013
1014 if (optind < argc)
1015 arg_files = argv + optind;
1016
1017 type_a = arg_getter || !strv_isempty(arg_files);
1018 type_b = arg_url
1019 || arg_listen_raw
1020 || arg_listen_http || arg_listen_https
1021 || sd_listen_fds(false) > 0;
1022 if (type_a && type_b)
1023 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1024 "Cannot use file input or --getter with "
1025 "--arg-listen-... or socket activation.");
1026 if (type_a) {
1027 if (!arg_output)
1028 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1029 "Option --output must be specified with file input or --getter.");
1030
1031 if (!IN_SET(arg_split_mode, JOURNAL_WRITE_SPLIT_NONE, _JOURNAL_WRITE_SPLIT_INVALID))
1032 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1033 "For active sources, only --split-mode=none is allowed.");
1034
1035 arg_split_mode = JOURNAL_WRITE_SPLIT_NONE;
1036 }
1037
1038 if (arg_split_mode == _JOURNAL_WRITE_SPLIT_INVALID)
1039 arg_split_mode = JOURNAL_WRITE_SPLIT_HOST;
1040
1041 if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE && arg_output) {
1042 if (is_dir(arg_output, true) > 0)
1043 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1044 "For SplitMode=none, output must be a file.");
1045 if (!endswith(arg_output, ".journal"))
1046 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1047 "For SplitMode=none, output file name must end with .journal.");
1048 }
1049
1050 if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST
1051 && arg_output && is_dir(arg_output, true) <= 0)
1052 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1053 "For SplitMode=host, output must be a directory.");
1054
1055 log_debug("Full config: SplitMode=%s Key=%s Cert=%s Trust=%s",
1056 journal_write_split_mode_to_string(arg_split_mode),
1057 strna(arg_key),
1058 strna(arg_cert),
1059 strna(arg_trust));
1060
1061 return 1 /* work to do */;
1062 }
1063
load_certificates(char ** key,char ** cert,char ** trust)1064 static int load_certificates(char **key, char **cert, char **trust) {
1065 int r;
1066
1067 r = read_full_file_full(
1068 AT_FDCWD, arg_key ?: PRIV_KEY_FILE, UINT64_MAX, SIZE_MAX,
1069 READ_FULL_FILE_SECURE|READ_FULL_FILE_WARN_WORLD_READABLE|READ_FULL_FILE_CONNECT_SOCKET,
1070 NULL,
1071 key, NULL);
1072 if (r < 0)
1073 return log_error_errno(r, "Failed to read key from file '%s': %m",
1074 arg_key ?: PRIV_KEY_FILE);
1075
1076 r = read_full_file_full(
1077 AT_FDCWD, arg_cert ?: CERT_FILE, UINT64_MAX, SIZE_MAX,
1078 READ_FULL_FILE_CONNECT_SOCKET,
1079 NULL,
1080 cert, NULL);
1081 if (r < 0)
1082 return log_error_errno(r, "Failed to read certificate from file '%s': %m",
1083 arg_cert ?: CERT_FILE);
1084
1085 if (arg_trust_all)
1086 log_info("Certificate checking disabled.");
1087 else {
1088 r = read_full_file_full(
1089 AT_FDCWD, arg_trust ?: TRUST_FILE, UINT64_MAX, SIZE_MAX,
1090 READ_FULL_FILE_CONNECT_SOCKET,
1091 NULL,
1092 trust, NULL);
1093 if (r < 0)
1094 return log_error_errno(r, "Failed to read CA certificate file '%s': %m",
1095 arg_trust ?: TRUST_FILE);
1096 }
1097
1098 if ((arg_listen_raw || arg_listen_http) && *trust)
1099 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1100 "Option --trust makes all non-HTTPS connections untrusted.");
1101
1102 return 0;
1103 }
1104
run(int argc,char ** argv)1105 static int run(int argc, char **argv) {
1106 _cleanup_(journal_remote_server_destroy) RemoteServer s = {};
1107 _unused_ _cleanup_(notify_on_cleanup) const char *notify_message = NULL;
1108 _cleanup_(erase_and_freep) char *key = NULL;
1109 _cleanup_free_ char *cert = NULL, *trust = NULL;
1110 int r;
1111
1112 log_show_color(true);
1113 log_parse_environment();
1114
1115 /* The journal merging logic potentially needs a lot of fds. */
1116 (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE);
1117
1118 r = parse_config();
1119 if (r < 0)
1120 return r;
1121
1122 r = parse_argv(argc, argv);
1123 if (r <= 0)
1124 return r;
1125
1126 if (arg_listen_http || arg_listen_https) {
1127 r = setup_gnutls_logger(arg_gnutls_log);
1128 if (r < 0)
1129 return r;
1130 }
1131
1132 if (arg_listen_https || https_socket >= 0) {
1133 r = load_certificates(&key, &cert, &trust);
1134 if (r < 0)
1135 return r;
1136
1137 s.check_trust = !arg_trust_all;
1138 }
1139
1140 r = create_remoteserver(&s, key, cert, trust);
1141 if (r < 0)
1142 return r;
1143
1144 r = sd_event_set_watchdog(s.events, true);
1145 if (r < 0)
1146 return log_error_errno(r, "Failed to enable watchdog: %m");
1147
1148 log_debug("Watchdog is %sd.", enable_disable(r > 0));
1149
1150 log_debug("%s running as pid "PID_FMT,
1151 program_invocation_short_name, getpid_cached());
1152
1153 notify_message = notify_start(NOTIFY_READY, NOTIFY_STOPPING);
1154
1155 while (s.active) {
1156 r = sd_event_get_state(s.events);
1157 if (r < 0)
1158 return r;
1159 if (r == SD_EVENT_FINISHED)
1160 break;
1161
1162 r = sd_event_run(s.events, -1);
1163 if (r < 0)
1164 return log_error_errno(r, "Failed to run event loop: %m");
1165 }
1166
1167 notify_message = NULL;
1168 (void) sd_notifyf(false,
1169 "STOPPING=1\n"
1170 "STATUS=Shutting down after writing %" PRIu64 " entries...", s.event_count);
1171
1172 log_info("Finishing after writing %" PRIu64 " entries", s.event_count);
1173
1174 return 0;
1175 }
1176
1177 DEFINE_MAIN_FUNCTION(run);
1178