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-rw-r--r--src/journal-remote/journal-remote.c1601
1 files changed, 1601 insertions, 0 deletions
diff --git a/src/journal-remote/journal-remote.c b/src/journal-remote/journal-remote.c
new file mode 100644
index 0000000000..3ce6fe27b3
--- /dev/null
+++ b/src/journal-remote/journal-remote.c
@@ -0,0 +1,1601 @@
+/***
+ 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 <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/prctl.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#ifdef HAVE_GNUTLS
+#include <gnutls/gnutls.h>
+#endif
+
+#include "sd-daemon.h"
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "def.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "journal-file.h"
+#include "journal-remote-write.h"
+#include "journal-remote.h"
+#include "journald-native.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "signal-util.h"
+#include "socket-util.h"
+#include "stat-util.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.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 = 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(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_extract(&words, getter, WHITESPACE, EXTRACT_QUOTES);
+ 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;
+}
+
+#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;
+
+ for (;;) {
+ 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_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 = 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_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_CONNECTION_MEMORY_LIMIT, 128*1024},
+ { 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_LINUX_ONLY |
+ MHD_USE_PEDANTIC_CHECKS |
+ MHD_USE_PIPE_FOR_SHUTDOWN;
+
+ 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 = 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 = 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_getter) {
+ log_info("Spawning getter %s...", arg_getter);
+ fd = spawn_getter(arg_getter);
+ if (fd < 0)
+ return fd;
+
+ r = add_source(s, fd, (char*) arg_output, false);
+ if (r < 0)
+ return r;
+ }
+
+ if (arg_url) {
+ const char *url;
+ char *hostname, *p;
+
+ if (!strstr(arg_url, "/entries")) {
+ if (endswith(arg_url, "/"))
+ url = strjoina(arg_url, "entries");
+ else
+ url = strjoina(arg_url, "/entries");
+ }
+ else
+ url = strdupa(arg_url);
+
+ 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;
+
+ hostname = strdupa(hostname);
+ if ((p = strchr(hostname, '/')))
+ *p = '\0';
+ if ((p = strchr(hostname, ':')))
+ *p = '\0';
+
+ r = add_source(s, fd, 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("Zero 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", "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(PKGSYSCONFDIR "/journal-remote.conf",
+ CONF_PATHS_NULSTR("systemd/journal-remote.conf.d"),
+ "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:
+ return version();
+
+ 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* p = optarg;
+ for (;;) {
+ _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
+ 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;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-06 11:41:49 +0000