-/*-*- 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 "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) {
- 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) {
- 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_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) {
- 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;
-}
~ianmdlvl / elogind.git / commitdiff