| /*-*- 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 <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| #include <getopt.h> |
| |
| #include "sd-daemon.h" |
| #include "journal-file.h" |
| #include "journald-native.h" |
| #include "socket-util.h" |
| #include "mkdir.h" |
| #include "build.h" |
| #include "macro.h" |
| #include "strv.h" |
| #include "fileio.h" |
| #include "conf-parser.h" |
| #include "siphash24.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) { |
| log_error("Failed to create pager pipe: %m"); |
| return -errno; |
| } |
| |
| parent_pid = getpid(); |
| |
| child_pid = fork(); |
| if (child_pid < 0) { |
| r = -errno; |
| log_error("Failed to fork: %m"); |
| safe_close_pair(fd); |
| return r; |
| } |
| |
| /* In the child */ |
| if (child_pid == 0) { |
| r = dup2(fd[1], STDOUT_FILENO); |
| if (r < 0) { |
| log_error("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("Failed to exec child %s: %m", child); |
| _exit(EXIT_FAILURE); |
| } |
| |
| r = close(fd[1]); |
| if (r < 0) |
| log_warning("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("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); |
| if (r < 0) { |
| log_error("Failed to split getter option: %s", strerror(-r)); |
| return r; |
| } |
| |
| r = strv_extend(&words, url); |
| if (r < 0) { |
| log_error("Failed to create command line: %s", strerror(-r)); |
| return r; |
| } |
| |
| r = spawn_child(words[0], words); |
| if (r < 0) |
| log_error("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("Failed to open output journal %s: %s", |
| output, strerror(-r)); |
| else |
| log_info("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_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) { |
| log_warning("Failed to get writer for source %s: %s", |
| name, strerror(-r)); |
| return r; |
| } |
| |
| 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; |
| 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("Failed to create source for fd:%d (%s): %s", |
| fd, name, strerror(-r)); |
| free(name); |
| return r; |
| } |
| |
| r = sd_event_add_io(s->events, &source->event, |
| fd, EPOLLIN|EPOLLRDHUP|EPOLLPRI, |
| dispatch_raw_source_event, s); |
| 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("Failed to register event source for fd:%d: %s", |
| fd, strerror(-r)); |
| goto error; |
| } |
| |
| r = sd_event_source_set_name(source->event, name); |
| if (r < 0) { |
| log_error("Failed to set source name for fd:%d: %s", fd, strerror(-r)); |
| 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[strlen("raw-socket-") + DECIMAL_STR_MAX(int)]; |
| |
| 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; |
| |
| snprintf(name, sizeof(name), "raw-socket-%d", fd); |
| |
| r = sd_event_source_set_name(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) { |
| log_warning("Failed to get writer for source %s: %s", |
| hostname, strerror(-r)); |
| return r; |
| } |
| |
| 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 || r == -EWOULDBLOCK) |
| 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) { |
| log_error("Failed to make fd:%d nonblocking: %s", fd, strerror(-r)); |
| return r; |
| } |
| |
| 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 = -ENOTSUP; |
| 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("Failed to add event callback: %s", strerror(-r)); |
| goto error; |
| } |
| |
| r = sd_event_source_set_name(d->event, "epoll-fd"); |
| if (r < 0) { |
| log_error("Failed to set source name: %s", strerror(-r)); |
| 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("Failed to add daemon to hashmap: %s", strerror(-r)); |
| 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_INFO, 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) { |
| sigset_t mask; |
| int r; |
| |
| assert(s); |
| |
| assert_se(sigemptyset(&mask) == 0); |
| sigset_add_many(&mask, SIGINT, SIGTERM, -1); |
| assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); |
| |
| r = sd_event_add_signal(s->events, &s->sigterm_event, SIGTERM, NULL, s); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_source_set_name(s->sigterm_event, "sigterm"); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, NULL, s); |
| if (r < 0) |
| return r; |
| |
| r = sd_event_source_set_name(s->sigint_event, "sigint"); |
| 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) { |
| log_error("Failed to allocate event loop: %s", strerror(-r)); |
| return r; |
| } |
| |
| 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) { |
| log_error("Failed to read listening file descriptors from environment: %s", |
| strerror(-n)); |
| return n; |
| } else |
| log_info("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_info("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) { |
| log_error("Failed to retrieve remote name: %s", strerror(-r)); |
| return r; |
| } |
| |
| log_info("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) { |
| log_error("Failed to register socket (fd:%d): %s", |
| fd, strerror(-r)); |
| return r; |
| } |
| } |
| |
| if (arg_url) { |
| const char *url, *hostname; |
| |
| url = strappenda(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_info("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_info("Using standard input as source."); |
| |
| fd = STDIN_FILENO; |
| output_name = "stdin"; |
| } else { |
| log_info("Reading file %s...", *file); |
| |
| fd = open(*file, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); |
| if (fd < 0) { |
| log_error("Failed to open %s: %m", *file); |
| return -errno; |
| } |
| 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 dispatch_raw_source_event(sd_event_source *event, |
| int fd, |
| uint32_t revents, |
| void *userdata) { |
| |
| RemoteServer *s = userdata; |
| RemoteSource *source; |
| int r; |
| |
| 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_info("EOF reached with source fd:%d (%s)", |
| source->fd, source->name); |
| |
| remaining = source_non_empty(source); |
| if (remaining > 0) |
| log_warning("Premature EOF. %zu bytes lost.", remaining); |
| remove_source(s, source->fd); |
| log_info("%zd active sources remaining", s->active); |
| return 0; |
| } else if (r == -E2BIG) { |
| log_error("Entry too big, skipped"); |
| return 1; |
| } else if (r == -EAGAIN) { |
| return 0; |
| } else if (r < 0) { |
| log_info("Closing connection: %s", strerror(-r)); |
| remove_source(server, fd); |
| return 0; |
| } else |
| return 1; |
| } |
| |
| static int dispatch_blocking_source_event(sd_event_source *event, |
| void *userdata) { |
| RemoteSource *source = userdata; |
| |
| return dispatch_raw_source_event(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) { |
| log_error("accept() on fd:%d failed: %m", fd); |
| return -errno; |
| } |
| |
| 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("socket_address_print(): %s", strerror(-r)); |
| close(fd2); |
| return r; |
| } |
| |
| r = socknameinfo_pretty(&addr->sockaddr, addr->size, &b); |
| if (r < 0) { |
| close(fd2); |
| return r; |
| } |
| |
| log_info("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; |
| |
| 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(NULL, PKGSYSCONFDIR "/journal-remote.conf", NULL, |
| "Remote\0", |
| config_item_table_lookup, items, |
| false, false, true, 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) { |
| log_error("Failed to read key from file '%s': %s", |
| arg_key ?: PRIV_KEY_FILE, strerror(-r)); |
| return r; |
| } |
| |
| r = read_full_file(arg_cert ?: CERT_FILE, cert, NULL); |
| if (r < 0) { |
| log_error("Failed to read certificate from file '%s': %s", |
| arg_cert ?: CERT_FILE, strerror(-r)); |
| return r; |
| } |
| |
| if (arg_trust_all) |
| log_info("Certificate checking disabled."); |
| else { |
| r = read_full_file(arg_trust ?: TRUST_FILE, trust, NULL); |
| if (r < 0) { |
| log_error("Failed to read CA certificate file '%s': %s", |
| arg_trust ?: TRUST_FILE, strerror(-r)); |
| return r; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int setup_gnutls_logger(char **categories) { |
| if (!arg_listen_http && !arg_listen_https) |
| return 0; |
| |
| #ifdef HAVE_GNUTLS |
| { |
| char **cat; |
| int r; |
| |
| gnutls_global_set_log_function(log_func_gnutls); |
| |
| if (categories) |
| STRV_FOREACH(cat, categories) { |
| r = log_enable_gnutls_category(*cat); |
| if (r < 0) |
| return r; |
| } |
| else |
| log_reset_gnutls_level(); |
| } |
| #endif |
| |
| 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; |
| |
| 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("Failed to enable watchdog: %s", strerror(-r)); |
| 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("Failed to run event loop: %s", strerror(-r)); |
| 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; |
| } |