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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef SUDO_LOGSRVD_H
#define SUDO_LOGSRVD_H
#if PROTOBUF_C_VERSION_NUMBER < 1003000
# error protobuf-c version 1.30 or higher required
#endif
#include "config.h"
#if defined(HAVE_OPENSSL)
# include <openssl/ssl.h>
#endif
#include "logsrv_util.h"
/* Default timeout value for server socket */
#define DEFAULT_SOCKET_TIMEOUT_SEC 30
/* How often to send an ACK to the client (commit point) in seconds */
#define ACK_FREQUENCY 10
/* Shutdown timeout (in seconds) in case client connections time out. */
#define SHUTDOWN_TIMEO 10
/*
* Connection status.
* In the RUNNING state we expect I/O log buffers.
*/
enum connection_status {
INITIAL,
RUNNING,
EXITED,
SHUTDOWN,
FINISHED,
ERROR
};
/*
* Per-connection state.
*/
struct connection_closure {
TAILQ_ENTRY(connection_closure) entries;
struct eventlog *evlog;
struct timespec elapsed_time;
struct connection_buffer read_buf;
struct connection_buffer write_buf;
struct sudo_event_base *evbase;
struct sudo_event *commit_ev;
struct sudo_event *read_ev;
struct sudo_event *write_ev;
#if defined(HAVE_OPENSSL)
struct sudo_event *ssl_accept_ev;
SSL *ssl;
#endif
const char *errstr;
struct iolog_file iolog_files[IOFD_MAX];
bool tls;
bool log_io;
bool read_instead_of_write;
bool write_instead_of_read;
bool temporary_write_event;
int iolog_dir_fd;
int sock;
#ifdef HAVE_STRUCT_IN6_ADDR
char ipaddr[INET6_ADDRSTRLEN];
#else
char ipaddr[INET_ADDRSTRLEN];
#endif
enum connection_status state;
};
union sockaddr_union {
struct sockaddr sa;
struct sockaddr_in sin;
#ifdef HAVE_STRUCT_IN6_ADDR
struct sockaddr_in6 sin6;
#endif
};
/*
* List of listen addresses.
*/
struct listen_address {
TAILQ_ENTRY(listen_address) entries;
char *sa_str;
union sockaddr_union sa_un;
socklen_t sa_size;
bool tls;
};
TAILQ_HEAD(listen_address_list, listen_address);
/*
* List of active network listeners.
*/
struct listener {
TAILQ_ENTRY(listener) entries;
struct sudo_event *ev;
int sock;
bool tls;
};
TAILQ_HEAD(listener_list, listener);
#if defined(HAVE_OPENSSL)
/* parameters to configure tls */
struct logsrvd_tls_config {
char *pkey_path;
char *cert_path;
char *cacert_path;
char *dhparams_path;
char *ciphers_v12;
char *ciphers_v13;
bool verify;
bool check_peer;
};
struct logsrvd_tls_runtime {
SSL_CTX *ssl_ctx;
};
#endif
/* iolog_writer.c */
struct eventlog *evlog_new(TimeSpec *submit_time, InfoMessage **info_msgs, size_t infolen);
bool iolog_init(AcceptMessage *msg, struct connection_closure *closure);
bool iolog_restart(RestartMessage *msg, struct connection_closure *closure);
int store_iobuf(int iofd, IoBuffer *msg, struct connection_closure *closure);
int store_suspend(CommandSuspend *msg, struct connection_closure *closure);
int store_winsize(ChangeWindowSize *msg, struct connection_closure *closure);
void iolog_close_all(struct connection_closure *closure);
/* logsrvd_conf.c */
bool logsrvd_conf_read(const char *path);
const char *logsrvd_conf_iolog_dir(void);
const char *logsrvd_conf_iolog_file(void);
struct listen_address_list *logsrvd_conf_listen_address(void);
bool logsrvd_conf_tcp_keepalive(void);
const char *logsrvd_conf_pid_file(void);
struct timespec *logsrvd_conf_get_sock_timeout(void);
#if defined(HAVE_OPENSSL)
const struct logsrvd_tls_config *logsrvd_get_tls_config(void);
struct logsrvd_tls_runtime *logsrvd_get_tls_runtime(void);
#endif
mode_t logsrvd_conf_iolog_mode(void);
#endif /* SUDO_LOGSRVD_H */
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