diff options
Diffstat (limited to 'src/journal-remote/journal-remote.c')
| -rw-r--r-- | src/journal-remote/journal-remote.c | 1283 |
1 files changed, 1283 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..9db4692a28 --- /dev/null +++ b/src/journal-remote/journal-remote.c @@ -0,0 +1,1283 @@ +/*-*- 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 <inttypes.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 "sd-event.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 "microhttpd-util.h" + +#ifdef HAVE_GNUTLS +#include <gnutls/gnutls.h> +#endif + +#include "journal-remote-parse.h" +#include "journal-remote-write.h" + +#define REMOTE_JOURNAL_PATH "/var/log/journal/" SD_ID128_FORMAT_STR "/remote-%s.journal" + +static char* arg_output = NULL; +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 char *key_pem = NULL; +static char *cert_pem = NULL; +static char *trust_pem = NULL; + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +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(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(char *getter, char *url) { + int r; + _cleanup_strv_free_ char **words = NULL; + + assert(getter); + words = strv_split_quoted(getter); + if (!words) + return log_oom(); + + r = spawn_child(words[0], words); + if (r < 0) + log_error("Failed to spawn getter %s: %m", getter); + + return r; +} + +static int open_output(Writer *s, const char* url) { + _cleanup_free_ char *name, *output = NULL; + char *c; + int r; + + assert(url); + name = strdup(url); + if (!name) + return log_oom(); + + for(c = name; *c; c++) { + if (*c == '/' || *c == ':' || *c == ' ') + *c = '~'; + else if (*c == '?') { + *c = '\0'; + break; + } + } + + if (!arg_output) { + sd_id128_t machine; + r = sd_id128_get_machine(&machine); + if (r < 0) { + log_error("failed to determine machine ID128: %s", strerror(-r)); + return r; + } + + r = asprintf(&output, REMOTE_JOURNAL_PATH, + SD_ID128_FORMAT_VAL(machine), name); + if (r < 0) + return log_oom(); + } else { + r = is_dir(arg_output, true); + if (r > 0) { + r = asprintf(&output, + "%s/remote-%s.journal", arg_output, name); + if (r < 0) + return log_oom(); + } else { + output = strdup(arg_output); + if (!output) + return log_oom(); + } + } + + r = journal_file_open_reliably(output, + O_RDWR|O_CREAT, 0640, + arg_compress, arg_seal, + &s->metrics, + s->mmap, + NULL, &s->journal); + if (r < 0) + log_error("Failed to open output journal %s: %s", + arg_output, strerror(-r)); + else + log_info("Opened output file %s", s->journal->path); + return r; +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +typedef struct MHDDaemonWrapper { + uint64_t fd; + struct MHD_Daemon *daemon; + + sd_event_source *event; +} MHDDaemonWrapper; + +typedef struct RemoteServer { + RemoteSource **sources; + size_t sources_size; + size_t active; + + sd_event *events; + sd_event_source *sigterm_event, *sigint_event, *listen_event; + + Writer writer; + + Hashmap *daemons; +} RemoteServer; + +/* 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_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, RemoteSource **source) { + assert(fd >= 0); + assert(source); + + if (!GREEDY_REALLOC0(s->sources, s->sources_size, fd + 1)) + return log_oom(); + + if (s->sources[fd] == NULL) { + s->sources[fd] = new0(RemoteSource, 1); + if (!s->sources[fd]) + return log_oom(); + s->sources[fd]->fd = -1; + 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) { + source_free(source); + s->sources[fd] = NULL; + s->active--; + } + + close(fd); + + return 0; +} + +static int add_source(RemoteServer *s, int fd, const char* name) { + RemoteSource *source = NULL; + _cleanup_free_ char *realname = NULL; + int r; + + assert(s); + assert(fd >= 0); + + if (name) { + realname = strdup(name); + if (!realname) + return log_oom(); + } else { + r = asprintf(&realname, "fd:%d", fd); + if (r < 0) + return log_oom(); + } + + log_debug("Creating source for fd:%d (%s)", fd, realname); + + r = get_source_for_fd(s, fd, &source); + if (r < 0) { + log_error("Failed to create source for fd:%d (%s)", fd, realname); + return r; + } + assert(source); + assert(source->fd < 0); + source->fd = fd; + + r = sd_event_add_io(s->events, &source->event, + fd, EPOLLIN, dispatch_raw_source_event, s); + if (r < 0) { + log_error("Failed to register event source 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; + + r = sd_event_add_io(s->events, &s->listen_event, fd, EPOLLIN, + dispatch_raw_connection_event, s); + if (r < 0) { + close(fd); + return r; + } + + 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 RemoteSource *request_meta(void **connection_cls) { + RemoteSource *source; + + assert(connection_cls); + if (*connection_cls) + return *connection_cls; + + source = new0(RemoteSource, 1); + if (!source) + return NULL; + source->fd = -1; + + log_debug("Added RemoteSource as connection metadata %p", source); + + *connection_cls = source; + return source; +} + +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; + + 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; + int r; + + assert(source); + + log_debug("request_handler_upload: connection %p, %zu bytes", + connection, *upload_data_size); + + if (*upload_data_size) { + log_info("Received %zu bytes", *upload_data_size); + + r = push_data(source, upload_data, *upload_data_size); + if (r < 0) { + log_error("Failed to store received data of size %zu: %s", + *upload_data_size, strerror(-r)); + return mhd_respond_oom(connection); + } + *upload_data_size = 0; + } else + finished = true; + + while (true) { + r = process_source(source, &server->writer, arg_compress, arg_seal); + if (r == -E2BIG) + log_warning("Entry too big, skipped"); + else if (r == -EAGAIN || r == -EWOULDBLOCK) + break; + else if (r < 0) { + log_warning("Failed to process data for connection %p", connection); + return mhd_respondf(connection, MHD_HTTP_UNPROCESSABLE_ENTITY, + "Processing failed: %s", strerror(-r)); + } + } + + if (!finished) + return MHD_YES; + + /* The upload is finished */ + + if (source_non_empty(source)) { + log_warning("EOF reached with incomplete data"); + return mhd_respond(connection, MHD_HTTP_EXPECTATION_FAILED, + "Trailing data not processed."); + } + + 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; + + assert(connection); + assert(connection_cls); + assert(url); + assert(method); + + log_debug("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"); + + if (trust_pem) { + r = check_permissions(connection, &code); + if (r < 0) + return code; + } + + if (!request_meta(connection_cls)) + return respond_oom(connection); + return MHD_YES; +} + +static int setup_microhttpd_server(RemoteServer *s, int fd, bool https) { + 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 (https) { + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_KEY, 0, key_pem}; + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_CERT, 0, cert_pem}; + + flags |= MHD_USE_SSL; + + if (trust_pem) + opts[opts_pos++] = (struct MHD_OptionItem) + {MHD_OPTION_HTTPS_MEM_TRUST, 0, trust_pem}; + } + + 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)", + https ? "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 = hashmap_ensure_allocated(&s->daemons, uint64_hash_func, uint64_compare_func); + 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, + bool https) { + int fd; + + fd = make_socket_fd(LOG_INFO, address, SOCK_STREAM | SOCK_CLOEXEC); + if (fd < 0) + return fd; + + return setup_microhttpd_server(s, fd, https); +} + +static int dispatch_http_event(sd_event_source *event, + int fd, + uint32_t revents, + void *userdata) { + MHDDaemonWrapper *d = userdata; + int r; + + assert(d); + + log_info("%s", __func__); + + 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 dispatch_sigterm(sd_event_source *event, + const struct signalfd_siginfo *si, + void *userdata) { + RemoteServer *s = userdata; + + assert(s); + + log_received_signal(LOG_INFO, si); + + sd_event_exit(s->events, 0); + return 0; +} + +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, dispatch_sigterm, s); + if (r < 0) + return r; + + r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, dispatch_sigterm, s); + if (r < 0) + return r; + + return 0; +} + +static int fd_fd(const char *spec) { + int fd, r; + + r = safe_atoi(spec, &fd); + if (r < 0) + return r; + + if (fd >= 0) + return -ENOENT; + + return -fd; +} + + +static int remoteserver_init(RemoteServer *s) { + int r, n, fd; + const char *output_name = NULL; + char **file; + + assert(s); + + sd_event_default(&s->events); + + setup_signals(s); + + assert(server == NULL); + server = s; + + 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, false)) { + log_info("Received a listening socket (fd:%d)", fd); + + if (fd == http_socket) + r = setup_microhttpd_server(s, fd, false); + else if (fd == https_socket) + r = setup_microhttpd_server(s, fd, true); + else + r = add_raw_socket(s, fd); + } else if (sd_is_socket(fd, AF_UNSPEC, 0, true)) { + log_info("Received a connection socket (fd:%d)", fd); + + r = add_source(s, fd, NULL); + } 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; + } + + output_name = "socket"; + } + + if (arg_url) { + _cleanup_free_ char *url = NULL; + _cleanup_strv_free_ char **urlv = strv_new(arg_url, "/entries", NULL); + if (!urlv) + return log_oom(); + url = strv_join(urlv, ""); + if (!url) + return log_oom(); + + 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; + + r = add_source(s, fd, arg_url); + if (r < 0) + return r; + + output_name = arg_url; + } + + if (arg_listen_raw) { + log_info("Listening on a socket..."); + r = setup_raw_socket(s, arg_listen_raw); + if (r < 0) + return r; + + output_name = arg_listen_raw; + } + + if (arg_listen_http) { + r = setup_microhttpd_socket(s, arg_listen_http, false); + if (r < 0) + return r; + + output_name = arg_listen_http; + } + + if (arg_listen_https) { + r = setup_microhttpd_socket(s, arg_listen_https, true); + if (r < 0) + return r; + + output_name = arg_listen_https; + } + + STRV_FOREACH(file, arg_files) { + if (streq(*file, "-")) { + log_info("Reading standard input..."); + + 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, output_name); + if (r < 0) + return r; + } + + if (s->active == 0) { + log_error("Zarro sources specified"); + return -EINVAL; + } + + if (!!n + !!arg_url + !!arg_listen_raw + !!arg_files) + output_name = "multiple"; + + r = writer_init(&s->writer); + if (r < 0) + return r; + + r = open_output(&s->writer, output_name); + return r; +} + +static int server_destroy(RemoteServer *s) { + int r; + size_t i; + MHDDaemonWrapper *d; + + r = writer_close(&s->writer); + + 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); + + 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... */ + + return r; +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +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, &s->writer, arg_compress, arg_seal); + if (source->state == STATE_EOF) { + log_info("EOF reached with source fd:%d (%s)", + source->fd, source->name); + if (source_non_empty(source)) + log_warning("EOF reached with incomplete data"); + remove_source(s, source->fd); + log_info("%zd active source remaining", s->active); + } else if (r == -E2BIG) { + log_error("Entry too big, skipped"); + r = 1; + } + + return r; +} + +static int accept_connection(const char* type, int fd, SocketAddress *addr) { + 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: { + char* _cleanup_free_ a = NULL; + + r = socket_address_print(addr, &a); + if (r < 0) { + log_error("socket_address_print(): %s", strerror(-r)); + close(fd2); + return r; + } + + log_info("Accepted %s %s connection from %s", + type, + socket_address_family(addr) == AF_INET ? "IP" : "IPv6", + a); + + 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, + }; + + fd2 = accept_connection("raw", fd, &addr); + if (fd2 < 0) + return fd2; + + return add_source(s, fd2, NULL); +} + +/********************************************************************** + ********************************************************************** + **********************************************************************/ + +static int help(void) { + printf("%s [OPTIONS...] {FILE|-}...\n\n" + "Write external journal events to a journal file.\n\n" + "Options:\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" + " --[no-]compress Use XZ-compression in the output journal (default: yes)\n" + " --[no-]seal Use Event sealing in the output journal (default: no)\n" + " --key=FILENAME Specify key in PEM format\n" + " --cert=FILENAME Specify certificate in PEM format\n" + " --trust=FILENAME Specify CA certificate in PEM format\n" + " --gnutls-log=CATEGORY...\n" + " Specify a list of gnutls logging categories\n" + " -h --help Show this help and exit\n" + " --version Print version string and exit\n" + "\n" + "Note: file descriptors from sd_listen_fds() will be consumed, too.\n" + , program_invocation_short_name); + + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_VERSION = 0x100, + ARG_URL, + ARG_LISTEN_RAW, + ARG_LISTEN_HTTP, + ARG_LISTEN_HTTPS, + ARG_GETTER, + ARG_COMPRESS, + ARG_NO_COMPRESS, + ARG_SEAL, + ARG_NO_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' }, + { "compress", no_argument, NULL, ARG_COMPRESS }, + { "no-compress", no_argument, NULL, ARG_NO_COMPRESS }, + { "seal", no_argument, NULL, ARG_SEAL }, + { "no-seal", no_argument, NULL, ARG_NO_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; + + 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 = fd_fd(optarg); + if (r >= 0) + http_socket = r; + else if (r == -ENOENT) + arg_listen_http = optarg; + else { + log_error("Invalid port/fd specification %s: %s", + optarg, strerror(-r)); + return -EINVAL; + } + + 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 = fd_fd(optarg); + if (r >= 0) + https_socket = r; + else if (r == -ENOENT) + arg_listen_https = optarg; + else { + log_error("Invalid port/fd specification %s: %s", + optarg, strerror(-r)); + return -EINVAL; + } + + break; + + case ARG_KEY: + if (key_pem) { + log_error("Key file specified twice"); + return -EINVAL; + } + r = read_full_file(optarg, &key_pem, NULL); + if (r < 0) { + log_error("Failed to read key file: %s", strerror(-r)); + return r; + } + assert(key_pem); + break; + + case ARG_CERT: + if (cert_pem) { + log_error("Certificate file specified twice"); + return -EINVAL; + } + r = read_full_file(optarg, &cert_pem, NULL); + if (r < 0) { + log_error("Failed to read certificate file: %s", strerror(-r)); + return r; + } + assert(cert_pem); + break; + + case ARG_TRUST: +#ifdef HAVE_GNUTLS + if (trust_pem) { + log_error("CA certificate file specified twice"); + return -EINVAL; + } + r = read_full_file(optarg, &trust_pem, NULL); + if (r < 0) { + log_error("Failed to read CA certificate file: %s", strerror(-r)); + return r; + } + assert(trust_pem); + break; +#else + log_error("Option --trust is not available."); + return -EINVAL; +#endif + + case 'o': + if (arg_output) { + log_error("cannot use --output/-o more than once"); + return -EINVAL; + } + + arg_output = optarg; + break; + + case ARG_COMPRESS: + arg_compress = true; + break; + case ARG_NO_COMPRESS: + arg_compress = false; + break; + case ARG_SEAL: + arg_seal = true; + break; + case ARG_NO_SEAL: + arg_seal = false; + break; + + case ARG_GNUTLS_LOG: { +#ifdef HAVE_GNUTLS + 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: + log_error("Unknown option code %c", c); + return -EINVAL; + } + + if (arg_listen_https && !(key_pem && cert_pem)) { + log_error("Options --key and --cert must be used when https sources are specified"); + return -EINVAL; + } + + if (optind < argc) + arg_files = argv + optind; + + return 1 /* work to do */; +} + +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, r2; + + log_set_max_level(LOG_DEBUG); + log_show_color(true); + log_parse_environment(); + + 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 (remoteserver_init(&s) < 0) + return EXIT_FAILURE; + + 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; + } + } + + log_info("Finishing after writing %" PRIu64 " entries", s.writer.seqnum); + r2 = server_destroy(&s); + + sd_notify(false, "STATUS=Shutting down..."); + + return r >= 0 && r2 >= 0 ? EXIT_SUCCESS : EXIT_FAILURE; +} |