/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2012 Zbigniew Jędrzejewski-Szmek systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/prctl.h> #include <sys/socket.h> #include <unistd.h> #include <getopt.h> #include "sd-daemon.h" #include "signal-util.h" #include "journal-file.h" #include "journald-native.h" #include "socket-util.h" #include "build.h" #include "macro.h" #include "strv.h" #include "fileio.h" #include "conf-parser.h" #ifdef HAVE_GNUTLS #include <gnutls/gnutls.h> #endif #include "journal-remote.h" #include "journal-remote-write.h" #define REMOTE_JOURNAL_PATH "/var/log/journal/remote" #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 char* arg_url = NULL; static char* arg_getter = NULL; static char* arg_listen_raw = NULL; static char* arg_listen_http = NULL; static char* arg_listen_https = NULL; static char** arg_files = NULL; static int arg_compress = true; static int 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_HOST; static char* arg_output = NULL; static char *arg_key = NULL; static char *arg_cert = NULL; static char *arg_trust = NULL; static bool arg_trust_all = false; /********************************************************************** ********************************************************************** **********************************************************************/ static int spawn_child(const char* child, char** argv) { int fd[2]; pid_t parent_pid, child_pid; int r; if (pipe(fd) < 0) return log_error_errno(errno, "Failed to create pager pipe: %m"); parent_pid = getpid(); child_pid = fork(); if (child_pid < 0) { r = -errno; log_error_errno(errno, "Failed to fork: %m"); safe_close_pair(fd); return r; } /* In the child */ if (child_pid == 0) { (void) reset_all_signal_handlers(); (void) reset_signal_mask(); r = dup2(fd[1], STDOUT_FILENO); if (r < 0) { log_error_errno(errno, "Failed to dup pipe to stdout: %m"); _exit(EXIT_FAILURE); } safe_close_pair(fd); /* Make sure the child goes away when the parent dies */ if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) _exit(EXIT_FAILURE); /* Check whether our parent died before we were able * to set the death signal */ if (getppid() != parent_pid) _exit(EXIT_SUCCESS); execvp(child, argv); log_error_errno(errno, "Failed to exec child %s: %m", child); _exit(EXIT_FAILURE); } r = close(fd[1]); if (r < 0) log_warning_errno(errno, "Failed to close write end of pipe: %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(errno, "Failed to spawn curl: %m"); return r; } static int spawn_getter(const char *getter, const char *url) { int r; _cleanup_strv_free_ char **words = NULL; assert(getter); r = strv_split_quoted(&words, getter, 0); if (r < 0) return log_error_errno(r, "Failed to split getter option: %m"); r = strv_extend(&words, url); if (r < 0) return log_error_errno(r, "Failed to create command line: %m"); r = spawn_child(words[0], words); if (r < 0) log_error_errno(errno, "Failed to spawn getter %s: %m", getter); return r; } #define filename_escape(s) xescape((s), "/ ") static int open_output(Writer *w, const char* host) { _cleanup_free_ char *_output = NULL; const char *output; int r; switch (arg_split_mode) { case JOURNAL_WRITE_SPLIT_NONE: output = arg_output ?: REMOTE_JOURNAL_PATH "/remote.journal"; break; case JOURNAL_WRITE_SPLIT_HOST: { _cleanup_free_ char *name; assert(host); name = filename_escape(host); if (!name) return log_oom(); r = asprintf(&_output, "%s/remote-%s.journal", arg_output ?: REMOTE_JOURNAL_PATH, name); if (r < 0) return log_oom(); output = _output; break; } default: assert_not_reached("what?"); } r = journal_file_open_reliably(output, O_RDWR|O_CREAT, 0640, arg_compress, arg_seal, &w->metrics, w->mmap, NULL, &w->journal); if (r < 0) log_error_errno(r, "Failed to open output journal %s: %m", output); else log_debug("Opened output file %s", w->journal->path); return r; } /********************************************************************** ********************************************************************** **********************************************************************/ static int init_writer_hashmap(RemoteServer *s) { static const struct hash_ops *hash_ops[] = { [JOURNAL_WRITE_SPLIT_NONE] = NULL, [JOURNAL_WRITE_SPLIT_HOST] = &string_hash_ops, }; assert(arg_split_mode >= 0 && arg_split_mode < (int) ELEMENTSOF(hash_ops)); s->writers = hashmap_new(hash_ops[arg_split_mode]); if (!s->writers) return log_oom(); return 0; } static int get_writer(RemoteServer *s, const char *host, Writer **writer) { const void *key; _cleanup_writer_unref_ Writer *w = NULL; int r; switch(arg_split_mode) { case JOURNAL_WRITE_SPLIT_NONE: key = "one and only"; break; case JOURNAL_WRITE_SPLIT_HOST: assert(host); key = host; break; default: assert_not_reached("what split mode?"); } w = hashmap_get(s->writers, key); if (w) writer_ref(w); else { w = writer_new(s); if (!w) return log_oom(); if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST) { w->hashmap_key = strdup(key); if (!w->hashmap_key) return log_oom(); } r = open_output(w, host); if (r < 0) return r; r = hashmap_put(s->writers, w->hashmap_key ?: key, w); if (r < 0) return r; } *writer = w; w = NULL; return 0; } /********************************************************************** ********************************************************************** **********************************************************************/ /* This should go away as soon as µhttpd allows state to be passed around. */ static RemoteServer *server; static int dispatch_raw_source_event(sd_event_source *event, int fd, uint32_t revents, void *userdata); static int dispatch_raw_source_until_block(sd_event_source *event, void *userdata); static int dispatch_blocking_source_event(sd_event_source *event, void *userdata); static int dispatch_raw_connection_event(sd_event_source *event, int fd, uint32_t revents, void *userdata); static int dispatch_http_event(sd_event_source *event, int fd, uint32_t revents, void *userdata); static int get_source_for_fd(RemoteServer *s, int fd, char *name, RemoteSource **source) { Writer *writer; int r; /* This takes ownership of name, but only on success. */ assert(fd >= 0); assert(source); if (!GREEDY_REALLOC0(s->sources, s->sources_size, fd + 1)) return log_oom(); r = get_writer(s, name, &writer); if (r < 0) return log_warning_errno(r, "Failed to get writer for source %s: %m", name); if (s->sources[fd] == NULL) { s->sources[fd] = source_new(fd, false, name, writer); if (!s->sources[fd]) { writer_unref(writer); return log_oom(); } s->active++; } *source = s->sources[fd]; return 0; } static int remove_source(RemoteServer *s, int fd) { RemoteSource *source; assert(s); assert(fd >= 0 && fd < (ssize_t) s->sources_size); source = s->sources[fd]; if (source) { /* this closes fd too */ source_free(source); s->sources[fd] = NULL; s->active--; } return 0; } static int add_source(RemoteServer *s, int fd, char* name, bool own_name) { RemoteSource *source = NULL; int r; /* This takes ownership of name, even on failure, if own_name is true. */ assert(s); assert(fd >= 0); assert(name); if (!own_name) { name = strdup(name); if (!name) return log_oom(); } r = get_source_for_fd(s, fd, name, &source); if (r < 0) { log_error_errno(r, "Failed to create source for fd:%d (%s): %m", fd, name); free(name); return r; } r = sd_event_add_io(s->events, &source->event, fd, EPOLLIN|EPOLLRDHUP|EPOLLPRI, dispatch_raw_source_event, source); if (r == 0) { /* Add additional source for buffer processing. It will be * enabled later. */ r = sd_event_add_defer(s->events, &source->buffer_event, dispatch_raw_source_until_block, source); if (r == 0) sd_event_source_set_enabled(source->buffer_event, SD_EVENT_OFF); } else if (r == -EPERM) { log_debug("Falling back to sd_event_add_defer for fd:%d (%s)", fd, name); r = sd_event_add_defer(s->events, &source->event, dispatch_blocking_source_event, source); if (r == 0) sd_event_source_set_enabled(source->event, SD_EVENT_ON); } if (r < 0) { log_error_errno(r, "Failed to register event source for fd:%d: %m", fd); goto error; } r = sd_event_source_set_description(source->event, name); if (r < 0) { log_error_errno(r, "Failed to set source name for fd:%d: %m", fd); goto error; } return 1; /* work to do */ error: remove_source(s, fd); return r; } static int add_raw_socket(RemoteServer *s, int fd) { int r; _cleanup_close_ int fd_ = fd; char name[sizeof("raw-socket-")-1 + DECIMAL_STR_MAX(int) + 1]; assert(fd >= 0); r = sd_event_add_io(s->events, &s->listen_event, fd, EPOLLIN, dispatch_raw_connection_event, s); if (r < 0) return r; xsprintf(name, "raw-socket-%d", fd); r = sd_event_source_set_description(s->listen_event, name); if (r < 0) return r; fd_ = -1; s->active ++; 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 add_raw_socket(s, fd); } /********************************************************************** ********************************************************************** **********************************************************************/ 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 = get_writer(server, 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 = push_data(source, upload_data, *upload_data_size); if (r < 0) return mhd_respond_oom(connection); *upload_data_size = 0; } else finished = true; while (true) { r = process_source(source, arg_compress, arg_seal); if (r == -EAGAIN) break; else if (r < 0) { log_warning("Failed to process data for connection %p", connection); if (r == -E2BIG) return mhd_respondf(connection, MHD_HTTP_REQUEST_ENTITY_TOO_LARGE, "Entry is too large, maximum is %u bytes.\n", DATA_SIZE_MAX); else return mhd_respondf(connection, MHD_HTTP_UNPROCESSABLE_ENTITY, "Processing failed: %s.", strerror(-r)); } } if (!finished) return MHD_YES; /* The upload is finished */ remaining = source_non_empty(source); if (remaining > 0) { log_warning("Premature EOFbyte. %zu bytes lost.", remaining); return mhd_respondf(connection, MHD_HTTP_EXPECTATION_FAILED, "Premature EOF. %zu bytes of trailing data not processed.", remaining); } return mhd_respond(connection, MHD_HTTP_ACCEPTED, "OK.\n"); }; static int 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; 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_METHOD_NOT_ACCEPTABLE, "Unsupported method.\n"); if (!streq(url, "/upload")) return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found.\n"); 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.\n"); { 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 (server->check_trust) { r = check_permissions(connection, &code, &hostname); if (r < 0) return code; } else { r = getnameinfo_pretty(fd, &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_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, strerror(-r)); 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_END}, { MHD_OPTION_END}, { MHD_OPTION_END}, { MHD_OPTION_END}}; int opts_pos = 3; int flags = MHD_USE_DEBUG | MHD_USE_PEDANTIC_CHECKS | MHD_USE_EPOLL_LINUX_ONLY | MHD_USE_DUAL_STACK; 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); 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_SSL; 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->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->event, "epoll-fd"); if (r < 0) { log_error_errno(r, "Failed to set source name: %m"); goto error; } r = hashmap_ensure_allocated(&s->daemons, &uint64_hash_ops); if (r < 0) { log_oom(); goto error; } r = hashmap_put(s->daemons, &d->fd, d); 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 dispatch_http_event(sd_event_source *event, int fd, uint32_t revents, void *userdata) { MHDDaemonWrapper *d = userdata; int r; assert(d); r = MHD_run(d->daemon); if (r == MHD_NO) { log_error("MHD_run failed!"); // XXX: unregister daemon return -EINVAL; } 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 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 remoteserver_init(RemoteServer *s, const char* key, const char* cert, const char* trust) { int r, n, fd; char **file; assert(s); if ((arg_listen_raw || arg_listen_http) && trust) { log_error("Option --trust makes all non-HTTPS connections untrusted."); return -EINVAL; } r = sd_event_default(&s->events); if (r < 0) return log_error_errno(r, "Failed to allocate event loop: %m"); setup_signals(s); assert(server == NULL); server = s; r = init_writer_hashmap(s); if (r < 0) return r; 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) { log_error("Received fewer sockets than expected"); return -EBADFD; } 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 = add_raw_socket(s, fd); } else if (sd_is_socket(fd, AF_UNSPEC, 0, false)) { char *hostname; r = getnameinfo_pretty(fd, &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 = add_source(s, fd, hostname, true); } else { log_error("Unknown socket passed on fd:%d", fd); return -EINVAL; } if (r < 0) return log_error_errno(r, "Failed to register socket (fd:%d): %m", fd); } if (arg_url) { const char *url, *hostname; url = strjoina(arg_url, "/entries"); if (arg_getter) { log_info("Spawning getter %s...", url); fd = spawn_getter(arg_getter, url); } else { log_info("Spawning curl %s...", url); fd = spawn_curl(url); } if (fd < 0) return fd; hostname = startswith(arg_url, "https://") ?: startswith(arg_url, "http://") ?: arg_url; r = 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 = add_source(s, fd, (char*) output_name, false); if (r < 0) return r; } if (s->active == 0) { log_error("Zarro sources specified"); return -EINVAL; } 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 = get_writer(s, NULL, &s->_single_writer); if (r < 0) return r; } return 0; } static void server_destroy(RemoteServer *s) { size_t i; MHDDaemonWrapper *d; while ((d = hashmap_steal_first(s->daemons))) { MHD_stop_daemon(d->daemon); sd_event_source_unref(d->event); free(d); } hashmap_free(s->daemons); assert(s->sources_size == 0 || s->sources); for (i = 0; i < s->sources_size; i++) remove_source(s, i); free(s->sources); writer_unref(s->_single_writer); hashmap_free(s->writers); sd_event_source_unref(s->sigterm_event); sd_event_source_unref(s->sigint_event); sd_event_source_unref(s->listen_event); sd_event_unref(s->events); /* fds that we're listening on remain open... */ } /********************************************************************** ********************************************************************** **********************************************************************/ static int handle_raw_source(sd_event_source *event, int fd, uint32_t revents, RemoteServer *s) { RemoteSource *source; int r; /* Returns 1 if there might be more data pending, * 0 if data is currently exhausted, negative on error. */ assert(fd >= 0 && fd < (ssize_t) s->sources_size); source = s->sources[fd]; assert(source->fd == fd); r = process_source(source, arg_compress, arg_seal); if (source->state == STATE_EOF) { size_t remaining; log_debug("EOF reached with source fd:%d (%s)", source->fd, source->name); remaining = source_non_empty(source); if (remaining > 0) log_notice("Premature EOF. %zu bytes lost.", remaining); remove_source(s, source->fd); log_debug("%zu active sources remaining", s->active); return 0; } else if (r == -E2BIG) { log_notice_errno(E2BIG, "Entry too big, skipped"); return 1; } else if (r == -EAGAIN) { return 0; } else if (r < 0) { log_debug_errno(r, "Closing connection: %m"); remove_source(server, fd); return 0; } else return 1; } static int dispatch_raw_source_until_block(sd_event_source *event, void *userdata) { RemoteSource *source = userdata; int r; /* Make sure event stays around even if source is destroyed */ sd_event_source_ref(event); r = handle_raw_source(event, source->fd, EPOLLIN, server); if (r != 1) /* No more data for now */ sd_event_source_set_enabled(event, SD_EVENT_OFF); sd_event_source_unref(event); return r; } static int dispatch_raw_source_event(sd_event_source *event, int fd, uint32_t revents, void *userdata) { RemoteSource *source = userdata; int r; assert(source->event); assert(source->buffer_event); r = handle_raw_source(event, fd, EPOLLIN, server); if (r == 1) /* Might have more data. We need to rerun the handler * until we are sure the buffer is exhausted. */ sd_event_source_set_enabled(source->buffer_event, SD_EVENT_ON); return r; } static int dispatch_blocking_source_event(sd_event_source *event, void *userdata) { RemoteSource *source = userdata; return handle_raw_source(event, source->fd, EPOLLIN, server); } static int accept_connection(const char* type, int fd, SocketAddress *addr, char **hostname) { int fd2, r; log_debug("Accepting new %s connection on fd:%d", type, fd); fd2 = accept4(fd, &addr->sockaddr.sa, &addr->size, SOCK_NONBLOCK|SOCK_CLOEXEC); if (fd2 < 0) return log_error_errno(errno, "accept() on fd:%d failed: %m", fd); switch(socket_address_family(addr)) { case AF_INET: case AF_INET6: { _cleanup_free_ char *a = NULL; char *b; r = socket_address_print(addr, &a); if (r < 0) { log_error_errno(r, "socket_address_print(): %m"); close(fd2); return r; } r = socknameinfo_pretty(&addr->sockaddr, addr->size, &b); if (r < 0) { log_error_errno(r, "Resolving hostname failed: %m"); close(fd2); return r; } log_debug("Accepted %s %s connection from %s", type, socket_address_family(addr) == AF_INET ? "IP" : "IPv6", a); *hostname = b; return fd2; }; default: log_error("Rejected %s connection with unsupported family %d", type, socket_address_family(addr)); close(fd2); return -EINVAL; } } static int dispatch_raw_connection_event(sd_event_source *event, int fd, uint32_t revents, void *userdata) { RemoteServer *s = userdata; int fd2; SocketAddress addr = { .size = sizeof(union sockaddr_union), .type = SOCK_STREAM, }; char *hostname = NULL; fd2 = accept_connection("raw", fd, &addr, &hostname); if (fd2 < 0) return fd2; return add_source(s, fd2, hostname, true); } /********************************************************************** ********************************************************************** **********************************************************************/ 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 parse_config(void) { const ConfigTableItem items[] = { { "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(PKGSYSCONFDIR "/journal-remote.conf", CONF_DIRS_NULSTR("systemd/journal-remote.conf"), "Remote\0", config_item_table_lookup, items, false, NULL); } static void help(void) { 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] XZ-compress 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" "\n" "Note: file descriptors from sd_listen_fds() will be consumed, too.\n" , program_invocation_short_name); } 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': help(); return 0 /* done */; case ARG_VERSION: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0 /* done */; case ARG_URL: if (arg_url) { log_error("cannot currently set more than one --url"); return -EINVAL; } arg_url = optarg; break; case ARG_GETTER: if (arg_getter) { log_error("cannot currently use --getter more than once"); return -EINVAL; } arg_getter = optarg; break; case ARG_LISTEN_RAW: if (arg_listen_raw) { log_error("cannot currently use --listen-raw more than once"); return -EINVAL; } arg_listen_raw = optarg; break; case ARG_LISTEN_HTTP: if (arg_listen_http || http_socket >= 0) { log_error("cannot currently use --listen-http more than once"); return -EINVAL; } 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) { log_error("cannot currently use --listen-https more than once"); return -EINVAL; } r = negative_fd(optarg); if (r >= 0) https_socket = r; else arg_listen_https = optarg; break; case ARG_KEY: if (arg_key) { log_error("Key file specified twice"); return -EINVAL; } arg_key = strdup(optarg); if (!arg_key) return log_oom(); break; case ARG_CERT: if (arg_cert) { log_error("Certificate file specified twice"); return -EINVAL; } arg_cert = strdup(optarg); if (!arg_cert) return log_oom(); break; case ARG_TRUST: if (arg_trust || arg_trust_all) { log_error("Confusing trusted CA configuration"); return -EINVAL; } if (streq(optarg, "all")) arg_trust_all = true; else { #ifdef HAVE_GNUTLS arg_trust = strdup(optarg); if (!arg_trust) return log_oom(); #else log_error("Option --trust is not available."); return -EINVAL; #endif } break; case 'o': if (arg_output) { log_error("cannot use --output/-o more than once"); return -EINVAL; } 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) { log_error("Invalid split mode: %s", optarg); return -EINVAL; } break; case ARG_COMPRESS: if (optarg) { r = parse_boolean(optarg); if (r < 0) { log_error("Failed to parse --compress= parameter."); return -EINVAL; } arg_compress = !!r; } else arg_compress = true; break; case ARG_SEAL: if (optarg) { r = parse_boolean(optarg); if (r < 0) { log_error("Failed to parse --seal= parameter."); return -EINVAL; } arg_seal = !!r; } else arg_seal = true; break; case ARG_GNUTLS_LOG: { #ifdef HAVE_GNUTLS const char *word, *state; size_t size; FOREACH_WORD_SEPARATOR(word, size, optarg, ",", state) { char *cat; cat = strndup(word, size); if (!cat) return log_oom(); if (strv_consume(&arg_gnutls_log, cat) < 0) return log_oom(); } break; #else log_error("Option --gnutls-log is not available."); return -EINVAL; #endif } case '?': return -EINVAL; default: assert_not_reached("Unknown option code."); } 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) { log_error("Cannot use file input or --getter with " "--arg-listen-... or socket activation."); return -EINVAL; } if (type_a) { if (!arg_output) { log_error("Option --output must be specified with file input or --getter."); return -EINVAL; } arg_split_mode = JOURNAL_WRITE_SPLIT_NONE; } if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE && arg_output && is_dir(arg_output, true) > 0) { log_error("For SplitMode=none, output must be a file."); return -EINVAL; } if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST && arg_output && is_dir(arg_output, true) <= 0) { log_error("For SplitMode=host, output must be a directory."); return -EINVAL; } 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(arg_key ?: PRIV_KEY_FILE, 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(arg_cert ?: CERT_FILE, 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(arg_trust ?: TRUST_FILE, trust, NULL); if (r < 0) return log_error_errno(r, "Failed to read CA certificate file '%s': %m", arg_trust ?: TRUST_FILE); } return 0; } int main(int argc, char **argv) { RemoteServer s = {}; int r; _cleanup_free_ char *key = NULL, *cert = NULL, *trust = NULL; log_show_color(true); log_parse_environment(); r = parse_config(); if (r < 0) return EXIT_FAILURE; r = parse_argv(argc, argv); if (r <= 0) return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE; if (arg_listen_http || arg_listen_https) { r = setup_gnutls_logger(arg_gnutls_log); if (r < 0) return EXIT_FAILURE; } if (arg_listen_https || https_socket >= 0) if (load_certificates(&key, &cert, &trust) < 0) return EXIT_FAILURE; if (remoteserver_init(&s, key, cert, trust) < 0) return EXIT_FAILURE; r = sd_event_set_watchdog(s.events, true); if (r < 0) log_error_errno(r, "Failed to enable watchdog: %m"); else log_debug("Watchdog is %s.", r > 0 ? "enabled" : "disabled"); log_debug("%s running as pid "PID_FMT, program_invocation_short_name, getpid()); sd_notify(false, "READY=1\n" "STATUS=Processing requests..."); while (s.active) { r = sd_event_get_state(s.events); if (r < 0) break; if (r == SD_EVENT_FINISHED) break; r = sd_event_run(s.events, -1); if (r < 0) { log_error_errno(r, "Failed to run event loop: %m"); break; } } 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); server_destroy(&s); free(arg_key); free(arg_cert); free(arg_trust); return r >= 0 ? EXIT_SUCCESS : EXIT_FAILURE; }