diff options
Diffstat (limited to 'src/journal-remote/journal-remote-main.c')
| -rw-r--r-- | src/journal-remote/journal-remote-main.c | 1178 |
1 files changed, 1178 insertions, 0 deletions
diff --git a/src/journal-remote/journal-remote-main.c b/src/journal-remote/journal-remote-main.c new file mode 100644 index 0000000..3141c8a --- /dev/null +++ b/src/journal-remote/journal-remote-main.c @@ -0,0 +1,1178 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <getopt.h> +#include <unistd.h> + +#include "sd-daemon.h" + +#include "conf-parser.h" +#include "daemon-util.h" +#include "def.h" +#include "fd-util.h" +#include "fileio.h" +#include "journal-remote-write.h" +#include "journal-remote.h" +#include "main-func.h" +#include "memory-util.h" +#include "parse-argument.h" +#include "pretty-print.h" +#include "process-util.h" +#include "rlimit-util.h" +#include "sigbus.h" +#include "signal-util.h" +#include "socket-netlink.h" +#include "socket-util.h" +#include "stat-util.h" +#include "string-table.h" +#include "strv.h" + +#define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-remote.pem" +#define CERT_FILE CERTIFICATE_ROOT "/certs/journal-remote.pem" +#define TRUST_FILE CERTIFICATE_ROOT "/ca/trusted.pem" + +static const char* arg_url = NULL; +static const char* arg_getter = NULL; +static const char* arg_listen_raw = NULL; +static const char* arg_listen_http = NULL; +static const char* arg_listen_https = NULL; +static char** arg_files = NULL; /* Do not free this. */ +static bool arg_compress = true; +static bool arg_seal = false; +static int http_socket = -1, https_socket = -1; +static char** arg_gnutls_log = NULL; + +static JournalWriteSplitMode arg_split_mode = _JOURNAL_WRITE_SPLIT_INVALID; +static const char* arg_output = NULL; + +static char *arg_key = NULL; +static char *arg_cert = NULL; +static char *arg_trust = NULL; +#if HAVE_GNUTLS +static bool arg_trust_all = false; +#else +static bool arg_trust_all = true; +#endif + +STATIC_DESTRUCTOR_REGISTER(arg_gnutls_log, strv_freep); +STATIC_DESTRUCTOR_REGISTER(arg_key, freep); +STATIC_DESTRUCTOR_REGISTER(arg_cert, freep); +STATIC_DESTRUCTOR_REGISTER(arg_trust, freep); + +static const char* const journal_write_split_mode_table[_JOURNAL_WRITE_SPLIT_MAX] = { + [JOURNAL_WRITE_SPLIT_NONE] = "none", + [JOURNAL_WRITE_SPLIT_HOST] = "host", +}; + +DEFINE_PRIVATE_STRING_TABLE_LOOKUP(journal_write_split_mode, JournalWriteSplitMode); +static DEFINE_CONFIG_PARSE_ENUM(config_parse_write_split_mode, + journal_write_split_mode, + JournalWriteSplitMode, + "Failed to parse split mode setting"); + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int spawn_child(const char* child, char** argv) { + pid_t child_pid; + int fd[2], r; + + if (pipe(fd) < 0) + return log_error_errno(errno, "Failed to create pager pipe: %m"); + + r = safe_fork("(remote)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &child_pid); + if (r < 0) { + safe_close_pair(fd); + return r; + } + + /* In the child */ + if (r == 0) { + fd[0] = safe_close(fd[0]); + + r = rearrange_stdio(STDIN_FILENO, TAKE_FD(fd[1]), STDERR_FILENO); + if (r < 0) { + log_error_errno(r, "Failed to dup pipe to stdout: %m"); + _exit(EXIT_FAILURE); + } + + (void) rlimit_nofile_safe(); + + execvp(child, argv); + log_error_errno(errno, "Failed to exec child %s: %m", child); + _exit(EXIT_FAILURE); + } + + safe_close(fd[1]); + + r = fd_nonblock(fd[0], true); + if (r < 0) + log_warning_errno(errno, "Failed to set child pipe to non-blocking: %m"); + + return fd[0]; +} + +static int spawn_curl(const char* url) { + char **argv = STRV_MAKE("curl", + "-HAccept: application/vnd.fdo.journal", + "--silent", + "--show-error", + url); + int r; + + r = spawn_child("curl", argv); + if (r < 0) + log_error_errno(r, "Failed to spawn curl: %m"); + return r; +} + +static int spawn_getter(const char *getter) { + int r; + _cleanup_strv_free_ char **words = NULL; + + assert(getter); + r = strv_split_full(&words, getter, WHITESPACE, EXTRACT_UNQUOTE); + if (r < 0) + return log_error_errno(r, "Failed to split getter option: %m"); + + r = spawn_child(words[0], words); + if (r < 0) + log_error_errno(r, "Failed to spawn getter %s: %m", getter); + + return r; +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int null_timer_event_handler(sd_event_source *s, + uint64_t usec, + void *userdata); +static int dispatch_http_event(sd_event_source *event, + int fd, + uint32_t revents, + void *userdata); + +static int request_meta(void **connection_cls, int fd, char *hostname) { + RemoteSource *source; + Writer *writer; + int r; + + assert(connection_cls); + if (*connection_cls) + return 0; + + r = journal_remote_get_writer(journal_remote_server_global, hostname, &writer); + if (r < 0) + return log_warning_errno(r, "Failed to get writer for source %s: %m", + hostname); + + source = source_new(fd, true, hostname, writer); + if (!source) { + writer_unref(writer); + return log_oom(); + } + + log_debug("Added RemoteSource as connection metadata %p", source); + + *connection_cls = source; + return 0; +} + +static void request_meta_free(void *cls, + struct MHD_Connection *connection, + void **connection_cls, + enum MHD_RequestTerminationCode toe) { + RemoteSource *s; + + assert(connection_cls); + s = *connection_cls; + + if (s) { + log_debug("Cleaning up connection metadata %p", s); + source_free(s); + *connection_cls = NULL; + } +} + +static int process_http_upload( + struct MHD_Connection *connection, + const char *upload_data, + size_t *upload_data_size, + RemoteSource *source) { + + bool finished = false; + size_t remaining; + int r; + + assert(source); + + log_trace("%s: connection %p, %zu bytes", + __func__, connection, *upload_data_size); + + if (*upload_data_size) { + log_trace("Received %zu bytes", *upload_data_size); + + r = journal_importer_push_data(&source->importer, + upload_data, *upload_data_size); + if (r < 0) + return mhd_respond_oom(connection); + + *upload_data_size = 0; + } else + finished = true; + + for (;;) { + r = process_source(source, journal_remote_server_global->file_flags); + if (r == -EAGAIN) + break; + if (r < 0) { + if (r == -ENOBUFS) + log_warning_errno(r, "Entry is above the maximum of %u, aborting connection %p.", + DATA_SIZE_MAX, connection); + else if (r == -E2BIG) + log_warning_errno(r, "Entry with more fields than the maximum of %u, aborting connection %p.", + ENTRY_FIELD_COUNT_MAX, connection); + else + log_warning_errno(r, "Failed to process data, aborting connection %p: %m", + connection); + return MHD_NO; + } + } + + if (!finished) + return MHD_YES; + + /* The upload is finished */ + + remaining = journal_importer_bytes_remaining(&source->importer); + if (remaining > 0) { + log_warning("Premature EOF byte. %zu bytes lost.", remaining); + return mhd_respondf(connection, + 0, MHD_HTTP_EXPECTATION_FAILED, + "Premature EOF. %zu bytes of trailing data not processed.", + remaining); + } + + return mhd_respond(connection, MHD_HTTP_ACCEPTED, "OK."); +}; + +static mhd_result 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) { + + const char *header; + int r, code, fd; + _cleanup_free_ char *hostname = NULL; + bool chunked = false; + + assert(connection); + assert(connection_cls); + assert(url); + assert(method); + + log_trace("Handling a connection %s %s %s", method, url, version); + + if (*connection_cls) + return process_http_upload(connection, + upload_data, upload_data_size, + *connection_cls); + + if (!streq(method, "POST")) + return mhd_respond(connection, MHD_HTTP_NOT_ACCEPTABLE, "Unsupported method."); + + if (!streq(url, "/upload")) + return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found."); + + header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Content-Type"); + if (!header || !streq(header, "application/vnd.fdo.journal")) + return mhd_respond(connection, MHD_HTTP_UNSUPPORTED_MEDIA_TYPE, + "Content-Type: application/vnd.fdo.journal is required."); + + header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Transfer-Encoding"); + if (header) { + if (!strcaseeq(header, "chunked")) + return mhd_respondf(connection, 0, MHD_HTTP_BAD_REQUEST, + "Unsupported Transfer-Encoding type: %s", header); + + chunked = true; + } + + header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Content-Length"); + if (header) { + size_t len; + + if (chunked) + return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, + "Content-Length must not specified when Transfer-Encoding type is 'chuncked'"); + + r = safe_atozu(header, &len); + if (r < 0) + return mhd_respondf(connection, r, MHD_HTTP_LENGTH_REQUIRED, + "Content-Length: %s cannot be parsed: %m", header); + + if (len > ENTRY_SIZE_MAX) + /* When serialized, an entry of maximum size might be slightly larger, + * so this does not correspond exactly to the limit in journald. Oh well. + */ + return mhd_respondf(connection, 0, MHD_HTTP_CONTENT_TOO_LARGE, + "Payload larger than maximum size of %u bytes", ENTRY_SIZE_MAX); + } + + { + const union MHD_ConnectionInfo *ci; + + ci = MHD_get_connection_info(connection, + MHD_CONNECTION_INFO_CONNECTION_FD); + if (!ci) { + log_error("MHD_get_connection_info failed: cannot get remote fd"); + return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, + "Cannot check remote address."); + } + + fd = ci->connect_fd; + assert(fd >= 0); + } + + if (journal_remote_server_global->check_trust) { + r = check_permissions(connection, &code, &hostname); + if (r < 0) + return code; + } else { + r = getpeername_pretty(fd, false, &hostname); + if (r < 0) + return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, + "Cannot check remote hostname."); + } + + assert(hostname); + + r = request_meta(connection_cls, fd, hostname); + if (r == -ENOMEM) + return respond_oom(connection); + else if (r < 0) + return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "%m"); + + hostname = NULL; + return MHD_YES; +} + +static int setup_microhttpd_server(RemoteServer *s, + int fd, + const char *key, + const char *cert, + const char *trust) { + struct MHD_OptionItem opts[] = { + { MHD_OPTION_NOTIFY_COMPLETED, (intptr_t) request_meta_free}, + { MHD_OPTION_EXTERNAL_LOGGER, (intptr_t) microhttpd_logger}, + { MHD_OPTION_LISTEN_SOCKET, fd}, + { MHD_OPTION_CONNECTION_MEMORY_LIMIT, 128*1024}, + { MHD_OPTION_END}, + { MHD_OPTION_END}, + { MHD_OPTION_END}, + { MHD_OPTION_END}, + { MHD_OPTION_END}}; + int opts_pos = 4; + int flags = + MHD_USE_DEBUG | + MHD_USE_DUAL_STACK | + MHD_USE_EPOLL | + MHD_USE_ITC; + + const union MHD_DaemonInfo *info; + int r, epoll_fd; + MHDDaemonWrapper *d; + + assert(fd >= 0); + + r = fd_nonblock(fd, true); + if (r < 0) + return log_error_errno(r, "Failed to make fd:%d nonblocking: %m", fd); + +/* MHD_OPTION_STRICT_FOR_CLIENT is introduced in microhttpd 0.9.54, + * and MHD_USE_PEDANTIC_CHECKS will be deprecated in future. + * If MHD_USE_PEDANTIC_CHECKS is '#define'd, then it is deprecated + * and we should use MHD_OPTION_STRICT_FOR_CLIENT. On the other hand, + * if MHD_USE_PEDANTIC_CHECKS is not '#define'd, then it is not + * deprecated yet and there exists an enum element with the same name. + * So we can safely use it. */ +#ifdef MHD_USE_PEDANTIC_CHECKS + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_STRICT_FOR_CLIENT, 1}; +#else + flags |= MHD_USE_PEDANTIC_CHECKS; +#endif + + if (key) { + assert(cert); + + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_KEY, 0, (char*) key}; + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_CERT, 0, (char*) cert}; + + flags |= MHD_USE_TLS; + + if (trust) + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_TRUST, 0, (char*) trust}; + } + + d = new(MHDDaemonWrapper, 1); + if (!d) + return log_oom(); + + d->fd = (uint64_t) fd; + + d->daemon = MHD_start_daemon(flags, 0, + NULL, NULL, + request_handler, NULL, + MHD_OPTION_ARRAY, opts, + MHD_OPTION_END); + if (!d->daemon) { + log_error("Failed to start µhttp daemon"); + r = -EINVAL; + goto error; + } + + log_debug("Started MHD %s daemon on fd:%d (wrapper @ %p)", + key ? "HTTPS" : "HTTP", fd, d); + + info = MHD_get_daemon_info(d->daemon, MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY); + if (!info) { + log_error("µhttp returned NULL daemon info"); + r = -EOPNOTSUPP; + goto error; + } + + epoll_fd = info->listen_fd; + if (epoll_fd < 0) { + log_error("µhttp epoll fd is invalid"); + r = -EUCLEAN; + goto error; + } + + r = sd_event_add_io(s->events, &d->io_event, + epoll_fd, EPOLLIN, + dispatch_http_event, d); + if (r < 0) { + log_error_errno(r, "Failed to add event callback: %m"); + goto error; + } + + r = sd_event_source_set_description(d->io_event, "io_event"); + if (r < 0) { + log_error_errno(r, "Failed to set source name: %m"); + goto error; + } + + r = sd_event_add_time(s->events, &d->timer_event, + CLOCK_MONOTONIC, UINT64_MAX, 0, + null_timer_event_handler, d); + if (r < 0) { + log_error_errno(r, "Failed to add timer_event: %m"); + goto error; + } + + r = sd_event_source_set_description(d->timer_event, "timer_event"); + if (r < 0) { + log_error_errno(r, "Failed to set source name: %m"); + goto error; + } + + r = hashmap_ensure_put(&s->daemons, &uint64_hash_ops, &d->fd, d); + if (r == -ENOMEM) { + log_oom(); + goto error; + } + if (r < 0) { + log_error_errno(r, "Failed to add daemon to hashmap: %m"); + goto error; + } + + s->active++; + return 0; + +error: + MHD_stop_daemon(d->daemon); + free(d->daemon); + free(d); + return r; +} + +static int setup_microhttpd_socket(RemoteServer *s, + const char *address, + const char *key, + const char *cert, + const char *trust) { + int fd; + + fd = make_socket_fd(LOG_DEBUG, address, SOCK_STREAM, SOCK_CLOEXEC); + if (fd < 0) + return fd; + + return setup_microhttpd_server(s, fd, key, cert, trust); +} + +static int null_timer_event_handler(sd_event_source *timer_event, + uint64_t usec, + void *userdata) { + return dispatch_http_event(timer_event, 0, 0, userdata); +} + +static int dispatch_http_event(sd_event_source *event, + int fd, + uint32_t revents, + void *userdata) { + MHDDaemonWrapper *d = ASSERT_PTR(userdata); + int r; + MHD_UNSIGNED_LONG_LONG timeout = ULLONG_MAX; + + r = MHD_run(d->daemon); + if (r == MHD_NO) + // FIXME: unregister daemon + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "MHD_run failed!"); + if (MHD_get_timeout(d->daemon, &timeout) == MHD_NO) + timeout = ULLONG_MAX; + + r = sd_event_source_set_time(d->timer_event, timeout); + if (r < 0) { + log_warning_errno(r, "Unable to set event loop timeout: %m, this may result in indefinite blocking!"); + return 1; + } + + r = sd_event_source_set_enabled(d->timer_event, SD_EVENT_ON); + if (r < 0) + log_warning_errno(r, "Unable to enable timer_event: %m, this may result in indefinite blocking!"); + + return 1; /* work to do */ +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int setup_signals(RemoteServer *s) { + int r; + + assert(s); + + assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0); + + r = sd_event_add_signal(s->events, &s->sigterm_event, SIGTERM, NULL, s); + if (r < 0) + return r; + + r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, NULL, s); + if (r < 0) + return r; + + return 0; +} + +static int setup_raw_socket(RemoteServer *s, const char *address) { + int fd; + + fd = make_socket_fd(LOG_INFO, address, SOCK_STREAM, SOCK_CLOEXEC); + if (fd < 0) + return fd; + + return journal_remote_add_raw_socket(s, fd); +} + +static int create_remoteserver( + RemoteServer *s, + const char* key, + const char* cert, + const char* trust) { + + int r, n, fd; + + r = journal_remote_server_init( + s, + arg_output, + arg_split_mode, + (arg_compress ? JOURNAL_COMPRESS : 0) | + (arg_seal ? JOURNAL_SEAL : 0)); + if (r < 0) + return r; + + r = setup_signals(s); + if (r < 0) + return log_error_errno(r, "Failed to set up signals: %m"); + + n = sd_listen_fds(true); + if (n < 0) + return log_error_errno(n, "Failed to read listening file descriptors from environment: %m"); + else + log_debug("Received %d descriptors", n); + + if (MAX(http_socket, https_socket) >= SD_LISTEN_FDS_START + n) + return log_error_errno(SYNTHETIC_ERRNO(EBADFD), + "Received fewer sockets than expected"); + + for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) { + if (sd_is_socket(fd, AF_UNSPEC, 0, true)) { + log_debug("Received a listening socket (fd:%d)", fd); + + if (fd == http_socket) + r = setup_microhttpd_server(s, fd, NULL, NULL, NULL); + else if (fd == https_socket) + r = setup_microhttpd_server(s, fd, key, cert, trust); + else + r = journal_remote_add_raw_socket(s, fd); + } else if (sd_is_socket(fd, AF_UNSPEC, 0, false)) { + char *hostname; + + r = getpeername_pretty(fd, false, &hostname); + if (r < 0) + return log_error_errno(r, "Failed to retrieve remote name: %m"); + + log_debug("Received a connection socket (fd:%d) from %s", fd, hostname); + + r = journal_remote_add_source(s, fd, hostname, true); + } else + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Unknown socket passed on fd:%d", fd); + + if (r < 0) + return log_error_errno(r, "Failed to register socket (fd:%d): %m", fd); + } + + if (arg_getter) { + log_info("Spawning getter %s...", arg_getter); + fd = spawn_getter(arg_getter); + if (fd < 0) + return fd; + + r = journal_remote_add_source(s, fd, (char*) arg_output, false); + if (r < 0) + return r; + } + + if (arg_url) { + const char *url, *hostname; + + if (!strstr(arg_url, "/entries")) { + if (endswith(arg_url, "/")) + url = strjoina(arg_url, "entries"); + else + url = strjoina(arg_url, "/entries"); + } else + url = strdupa_safe(arg_url); + + log_info("Spawning curl %s...", url); + fd = spawn_curl(url); + if (fd < 0) + return fd; + + hostname = STARTSWITH_SET(arg_url, "https://", "http://"); + if (!hostname) + hostname = arg_url; + + hostname = strndupa_safe(hostname, strcspn(hostname, "/:")); + + r = journal_remote_add_source(s, fd, (char *) hostname, false); + if (r < 0) + return r; + } + + if (arg_listen_raw) { + log_debug("Listening on a socket..."); + r = setup_raw_socket(s, arg_listen_raw); + if (r < 0) + return r; + } + + if (arg_listen_http) { + r = setup_microhttpd_socket(s, arg_listen_http, NULL, NULL, NULL); + if (r < 0) + return r; + } + + if (arg_listen_https) { + r = setup_microhttpd_socket(s, arg_listen_https, key, cert, trust); + if (r < 0) + return r; + } + + STRV_FOREACH(file, arg_files) { + const char *output_name; + + if (streq(*file, "-")) { + log_debug("Using standard input as source."); + + fd = STDIN_FILENO; + output_name = "stdin"; + } else { + log_debug("Reading file %s...", *file); + + fd = open(*file, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); + if (fd < 0) + return log_error_errno(errno, "Failed to open %s: %m", *file); + output_name = *file; + } + + r = journal_remote_add_source(s, fd, (char*) output_name, false); + if (r < 0) + return r; + } + + if (s->active == 0) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Zero sources specified"); + + if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE) { + /* In this case we know what the writer will be + called, so we can create it and verify that we can + create output as expected. */ + r = journal_remote_get_writer(s, NULL, &s->_single_writer); + if (r < 0) + return r; + } + + return 0; +} + +static int negative_fd(const char *spec) { + /* Return a non-positive number as its inverse, -EINVAL otherwise. */ + + int fd, r; + + r = safe_atoi(spec, &fd); + if (r < 0) + return r; + + if (fd > 0) + return -EINVAL; + else + return -fd; +} + +static int parse_config(void) { + const ConfigTableItem items[] = { + { "Remote", "Seal", config_parse_bool, 0, &arg_seal }, + { "Remote", "SplitMode", config_parse_write_split_mode, 0, &arg_split_mode }, + { "Remote", "ServerKeyFile", config_parse_path, 0, &arg_key }, + { "Remote", "ServerCertificateFile", config_parse_path, 0, &arg_cert }, + { "Remote", "TrustedCertificateFile", config_parse_path, 0, &arg_trust }, + {} + }; + + return config_parse_many_nulstr( + PKGSYSCONFDIR "/journal-remote.conf", + CONF_PATHS_NULSTR("systemd/journal-remote.conf.d"), + "Remote\0", + config_item_table_lookup, items, + CONFIG_PARSE_WARN, + NULL, + NULL); +} + +static int help(void) { + _cleanup_free_ char *link = NULL; + int r; + + r = terminal_urlify_man("systemd-journal-remote.service", "8", &link); + if (r < 0) + return log_oom(); + + printf("%s [OPTIONS...] {FILE|-}...\n\n" + "Write external journal events to journal file(s).\n\n" + " -h --help Show this help\n" + " --version Show package version\n" + " --url=URL Read events from systemd-journal-gatewayd at URL\n" + " --getter=COMMAND Read events from the output of COMMAND\n" + " --listen-raw=ADDR Listen for connections at ADDR\n" + " --listen-http=ADDR Listen for HTTP connections at ADDR\n" + " --listen-https=ADDR Listen for HTTPS connections at ADDR\n" + " -o --output=FILE|DIR Write output to FILE or DIR/external-*.journal\n" + " --compress[=BOOL] Use compression in the output journal (default: yes)\n" + " --seal[=BOOL] Use event sealing (default: no)\n" + " --key=FILENAME SSL key in PEM format (default:\n" + " \"" PRIV_KEY_FILE "\")\n" + " --cert=FILENAME SSL certificate in PEM format (default:\n" + " \"" CERT_FILE "\")\n" + " --trust=FILENAME|all SSL CA certificate or disable checking (default:\n" + " \"" TRUST_FILE "\")\n" + " --gnutls-log=CATEGORY...\n" + " Specify a list of gnutls logging categories\n" + " --split-mode=none|host How many output files to create\n" + "\nNote: file descriptors from sd_listen_fds() will be consumed, too.\n" + "\nSee the %s for details.\n", + program_invocation_short_name, + link); + + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_VERSION = 0x100, + ARG_URL, + ARG_LISTEN_RAW, + ARG_LISTEN_HTTP, + ARG_LISTEN_HTTPS, + ARG_GETTER, + ARG_SPLIT_MODE, + ARG_COMPRESS, + ARG_SEAL, + ARG_KEY, + ARG_CERT, + ARG_TRUST, + ARG_GNUTLS_LOG, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "url", required_argument, NULL, ARG_URL }, + { "getter", required_argument, NULL, ARG_GETTER }, + { "listen-raw", required_argument, NULL, ARG_LISTEN_RAW }, + { "listen-http", required_argument, NULL, ARG_LISTEN_HTTP }, + { "listen-https", required_argument, NULL, ARG_LISTEN_HTTPS }, + { "output", required_argument, NULL, 'o' }, + { "split-mode", required_argument, NULL, ARG_SPLIT_MODE }, + { "compress", optional_argument, NULL, ARG_COMPRESS }, + { "seal", optional_argument, NULL, ARG_SEAL }, + { "key", required_argument, NULL, ARG_KEY }, + { "cert", required_argument, NULL, ARG_CERT }, + { "trust", required_argument, NULL, ARG_TRUST }, + { "gnutls-log", required_argument, NULL, ARG_GNUTLS_LOG }, + {} + }; + + int c, r; + bool type_a, type_b; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "ho:", options, NULL)) >= 0) + switch (c) { + + case 'h': + return help(); + + case ARG_VERSION: + return version(); + + case ARG_URL: + if (arg_url) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "cannot currently set more than one --url"); + + arg_url = optarg; + break; + + case ARG_GETTER: + if (arg_getter) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "cannot currently use --getter more than once"); + + arg_getter = optarg; + break; + + case ARG_LISTEN_RAW: + if (arg_listen_raw) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "cannot currently use --listen-raw more than once"); + + arg_listen_raw = optarg; + break; + + case ARG_LISTEN_HTTP: + if (arg_listen_http || http_socket >= 0) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "cannot currently use --listen-http more than once"); + + r = negative_fd(optarg); + if (r >= 0) + http_socket = r; + else + arg_listen_http = optarg; + break; + + case ARG_LISTEN_HTTPS: + if (arg_listen_https || https_socket >= 0) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "cannot currently use --listen-https more than once"); + + r = negative_fd(optarg); + if (r >= 0) + https_socket = r; + else + arg_listen_https = optarg; + + break; + + case ARG_KEY: + if (arg_key) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Key file specified twice"); + + arg_key = strdup(optarg); + if (!arg_key) + return log_oom(); + + break; + + case ARG_CERT: + if (arg_cert) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Certificate file specified twice"); + + arg_cert = strdup(optarg); + if (!arg_cert) + return log_oom(); + + break; + + case ARG_TRUST: +#if HAVE_GNUTLS + if (arg_trust || arg_trust_all) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Confusing trusted CA configuration"); + + if (streq(optarg, "all")) + arg_trust_all = true; + else { + arg_trust = strdup(optarg); + if (!arg_trust) + return log_oom(); + } +#else + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Option --trust is not available."); +#endif + break; + + case 'o': + if (arg_output) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "cannot use --output/-o more than once"); + + arg_output = optarg; + break; + + case ARG_SPLIT_MODE: + arg_split_mode = journal_write_split_mode_from_string(optarg); + if (arg_split_mode == _JOURNAL_WRITE_SPLIT_INVALID) + return log_error_errno(arg_split_mode, "Invalid split mode: %s", optarg); + break; + + case ARG_COMPRESS: + r = parse_boolean_argument("--compress", optarg, &arg_compress); + if (r < 0) + return r; + break; + + case ARG_SEAL: + r = parse_boolean_argument("--seal", optarg, &arg_seal); + if (r < 0) + return r; + break; + + case ARG_GNUTLS_LOG: +#if HAVE_GNUTLS + for (const char* p = optarg;;) { + _cleanup_free_ char *word = NULL; + + r = extract_first_word(&p, &word, ",", 0); + if (r < 0) + return log_error_errno(r, "Failed to parse --gnutls-log= argument: %m"); + if (r == 0) + break; + + if (strv_push(&arg_gnutls_log, word) < 0) + return log_oom(); + + word = NULL; + } + break; +#else + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Option --gnutls-log is not available."); +#endif + + case '?': + return -EINVAL; + + default: + assert_not_reached(); + } + + if (optind < argc) + arg_files = argv + optind; + + type_a = arg_getter || !strv_isempty(arg_files); + type_b = arg_url + || arg_listen_raw + || arg_listen_http || arg_listen_https + || sd_listen_fds(false) > 0; + if (type_a && type_b) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Cannot use file input or --getter with " + "--arg-listen-... or socket activation."); + if (type_a) { + if (!arg_output) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Option --output must be specified with file input or --getter."); + + if (!IN_SET(arg_split_mode, JOURNAL_WRITE_SPLIT_NONE, _JOURNAL_WRITE_SPLIT_INVALID)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "For active sources, only --split-mode=none is allowed."); + + arg_split_mode = JOURNAL_WRITE_SPLIT_NONE; + } + + if (arg_split_mode == _JOURNAL_WRITE_SPLIT_INVALID) + arg_split_mode = JOURNAL_WRITE_SPLIT_HOST; + + if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE && arg_output) { + if (is_dir(arg_output, true) > 0) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "For SplitMode=none, output must be a file."); + if (!endswith(arg_output, ".journal")) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "For SplitMode=none, output file name must end with .journal."); + } + + if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST + && arg_output && is_dir(arg_output, true) <= 0) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "For SplitMode=host, output must be a directory."); + + log_debug("Full config: SplitMode=%s Key=%s Cert=%s Trust=%s", + journal_write_split_mode_to_string(arg_split_mode), + strna(arg_key), + strna(arg_cert), + strna(arg_trust)); + + return 1 /* work to do */; +} + +static int load_certificates(char **key, char **cert, char **trust) { + int r; + + r = read_full_file_full( + AT_FDCWD, arg_key ?: PRIV_KEY_FILE, UINT64_MAX, SIZE_MAX, + READ_FULL_FILE_SECURE|READ_FULL_FILE_WARN_WORLD_READABLE|READ_FULL_FILE_CONNECT_SOCKET, + NULL, + key, NULL); + if (r < 0) + return log_error_errno(r, "Failed to read key from file '%s': %m", + arg_key ?: PRIV_KEY_FILE); + + r = read_full_file_full( + AT_FDCWD, arg_cert ?: CERT_FILE, UINT64_MAX, SIZE_MAX, + READ_FULL_FILE_CONNECT_SOCKET, + NULL, + cert, NULL); + if (r < 0) + return log_error_errno(r, "Failed to read certificate from file '%s': %m", + arg_cert ?: CERT_FILE); + + if (arg_trust_all) + log_info("Certificate checking disabled."); + else { + r = read_full_file_full( + AT_FDCWD, arg_trust ?: TRUST_FILE, UINT64_MAX, SIZE_MAX, + READ_FULL_FILE_CONNECT_SOCKET, + NULL, + trust, NULL); + if (r < 0) + return log_error_errno(r, "Failed to read CA certificate file '%s': %m", + arg_trust ?: TRUST_FILE); + } + + if ((arg_listen_raw || arg_listen_http) && *trust) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Option --trust makes all non-HTTPS connections untrusted."); + + return 0; +} + +static int run(int argc, char **argv) { + _cleanup_(journal_remote_server_destroy) RemoteServer s = {}; + _unused_ _cleanup_(notify_on_cleanup) const char *notify_message = NULL; + _cleanup_(erase_and_freep) char *key = NULL; + _cleanup_free_ char *cert = NULL, *trust = NULL; + int r; + + log_show_color(true); + log_parse_environment(); + + /* The journal merging logic potentially needs a lot of fds. */ + (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE); + + sigbus_install(); + + r = parse_config(); + if (r < 0) + return r; + + r = parse_argv(argc, argv); + if (r <= 0) + return r; + + if (arg_listen_http || arg_listen_https) { + r = setup_gnutls_logger(arg_gnutls_log); + if (r < 0) + return r; + } + + if (arg_listen_https || https_socket >= 0) { + r = load_certificates(&key, &cert, &trust); + if (r < 0) + return r; + + s.check_trust = !arg_trust_all; + } + + r = create_remoteserver(&s, key, cert, trust); + if (r < 0) + return r; + + r = sd_event_set_watchdog(s.events, true); + if (r < 0) + return log_error_errno(r, "Failed to enable watchdog: %m"); + + log_debug("Watchdog is %sd.", enable_disable(r > 0)); + + log_debug("%s running as pid "PID_FMT, + program_invocation_short_name, getpid_cached()); + + notify_message = notify_start(NOTIFY_READY, NOTIFY_STOPPING); + + while (s.active) { + r = sd_event_get_state(s.events); + if (r < 0) + return r; + if (r == SD_EVENT_FINISHED) + break; + + r = sd_event_run(s.events, -1); + if (r < 0) + return log_error_errno(r, "Failed to run event loop: %m"); + } + + notify_message = NULL; + (void) sd_notifyf(false, + "STOPPING=1\n" + "STATUS=Shutting down after writing %" PRIu64 " entries...", s.event_count); + + log_info("Finishing after writing %" PRIu64 " entries", s.event_count); + + return 0; +} + +DEFINE_MAIN_FUNCTION(run); |