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/*-
* Copyright (c) 2012 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Pawel Jakub Dawidek under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $P4: //depot/projects/trustedbsd/openbsm/bin/auditdistd/auditdistd.h#2 $
*/
#ifndef _AUDITDISTD_H_
#define _AUDITDISTD_H_
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <dirent.h>
#include <limits.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdint.h>
#include <compat/compat.h>
#include "proto.h"
/*
* Version history:
* 0 - initial version
*/
#define ADIST_VERSION 0
#define ADIST_ROLE_UNDEF 0
#define ADIST_ROLE_SENDER 1
#define ADIST_ROLE_RECEIVER 2
#define ADIST_USER "auditdistd"
#define ADIST_TIMEOUT 20
#define ADIST_CONFIG "/etc/security/auditdistd.conf"
#define ADIST_TCP_PORT "7878"
#define ADIST_LISTEN_TLS_TCP4 "tls://0.0.0.0:" ADIST_TCP_PORT
#define ADIST_LISTEN_TLS_TCP6 "tls://[::]:" ADIST_TCP_PORT
#define ADIST_PIDFILE "/var/run/auditdistd.pid"
#define ADIST_DIRECTORY_SENDER "/var/audit/dist"
#define ADIST_DIRECTORY_RECEIVER "/var/audit/remote"
#define ADIST_CERTFILE "/etc/security/auditdistd.cert.pem"
#define ADIST_KEYFILE "/etc/security/auditdistd.key.pem"
#define ADIST_ERROR_WRONG_ORDER 1
#define ADIST_ERROR_INVALID_NAME 2
#define ADIST_ERROR_OPEN_OLD 3
#define ADIST_ERROR_CREATE 4
#define ADIST_ERROR_OPEN 5
#define ADIST_ERROR_READ 6
#define ADIST_ERROR_WRITE 7
#define ADIST_ERROR_RENAME 8
#define ADIST_ADDRSIZE 1024
#define ADIST_HOSTSIZE 256
#define ADIST_PATHSIZE 256
#define ADIST_PASSWORDSIZE 128
#define ADIST_FINGERPRINTSIZE 256
/* Number of seconds to sleep between reconnect retries or keepalive packets. */
#define ADIST_KEEPALIVE 10
struct adist_listen {
/* Address to listen on. */
char adl_addr[ADIST_ADDRSIZE];
/* Protocol-specific data. */
struct proto_conn *adl_conn;
TAILQ_ENTRY(adist_listen) adl_next;
};
struct adist_config {
/* Our name. */
char adc_name[ADIST_HOSTSIZE];
/* PID file path. */
char adc_pidfile[PATH_MAX];
/* Connection timeout. */
int adc_timeout;
/* Path to receiver's certificate file. */
char adc_certfile[PATH_MAX];
/* Path to receiver's private key file. */
char adc_keyfile[PATH_MAX];
/* List of addresses to listen on. */
TAILQ_HEAD(, adist_listen) adc_listen;
/* List of hosts. */
TAILQ_HEAD(, adist_host) adc_hosts;
};
#define ADIST_COMPRESSION_NONE 0
#define ADIST_COMPRESSION_LZF 1
#define ADIST_CHECKSUM_NONE 0
#define ADIST_CHECKSUM_CRC32 1
#define ADIST_CHECKSUM_SHA256 2
/*
* Structure that describes single host (either sender or receiver).
*/
struct adist_host {
/* Host name. */
char adh_name[ADIST_HOSTSIZE];
/* Host role: ADIST_ROLE_{SENDER,RECEIVER}. */
int adh_role;
/* Protocol version negotiated. */
int adh_version;
/* Local address to bind to. */
char adh_localaddr[ADIST_ADDRSIZE];
/* Address of the remote component. */
char adh_remoteaddr[ADIST_ADDRSIZE];
/* Connection with remote host. */
struct proto_conn *adh_remote;
/* Connection was reestablished, reset the state. */
bool adh_reset;
/*
* Directory from which audit trail files should be send in
* ADIST_ROLE_SENDER case or stored into in ADIST_ROLE_RECEIVER case.
*/
char adh_directory[PATH_MAX];
/* Compression algorithm. Currently unused. */
int adh_compression;
/* Checksum algorithm. Currently unused. */
int adh_checksum;
/* Sender's password. */
char adh_password[ADIST_PASSWORDSIZE];
/* Fingerprint of receiver's public key. */
char adh_fingerprint[ADIST_FINGERPRINTSIZE];
/* PID of child worker process. 0 - no child. */
pid_t adh_worker_pid;
/* Connection requests from sender to main. */
struct proto_conn *adh_conn;
/* Receiver-specific fields. */
char adh_trail_name[ADIST_PATHSIZE];
int adh_trail_fd;
int adh_trail_dirfd;
DIR *adh_trail_dirfp;
/* Sender-specific fields. */
uint64_t adh_trail_offset;
/* Next resource. */
TAILQ_ENTRY(adist_host) adh_next;
};
#define ADIST_BYTEORDER_UNDEFINED 0
#define ADIST_BYTEORDER_LITTLE_ENDIAN 1
#define ADIST_BYTEORDER_BIG_ENDIAN 2
#if _BYTE_ORDER == _LITTLE_ENDIAN
#define ADIST_BYTEORDER ADIST_BYTEORDER_LITTLE_ENDIAN
#elif _BYTE_ORDER == _BIG_ENDIAN
#define ADIST_BYTEORDER ADIST_BYTEORDER_BIG_ENDIAN
#else
#error Unknown byte order.
#endif
struct adpkt {
uint8_t adp_byteorder;
#define ADIST_CMD_UNDEFINED 0
#define ADIST_CMD_OPEN 1
#define ADIST_CMD_APPEND 2
#define ADIST_CMD_CLOSE 3
#define ADIST_CMD_KEEPALIVE 4
#define ADIST_CMD_ERROR 5
uint8_t adp_cmd;
uint64_t adp_seq;
uint32_t adp_datasize;
unsigned char adp_data[0];
} __packed;
struct adreq {
int adr_error;
TAILQ_ENTRY(adreq) adr_next;
struct adpkt adr_packet;
};
#define adr_byteorder adr_packet.adp_byteorder
#define adr_cmd adr_packet.adp_cmd
#define adr_seq adr_packet.adp_seq
#define adr_datasize adr_packet.adp_datasize
#define adr_data adr_packet.adp_data
#define ADPKT_SIZE(adreq) (sizeof((adreq)->adr_packet) + (adreq)->adr_datasize)
struct adrep {
uint8_t adrp_byteorder;
uint64_t adrp_seq;
uint16_t adrp_error;
} __packed;
#define ADIST_QUEUE_SIZE 16
#define ADIST_BUF_SIZE 65536
#define QUEUE_TAKE(adreq, list, timeout) do { \
mtx_lock(list##_lock); \
if ((timeout) == 0) { \
while (((adreq) = TAILQ_FIRST(list)) == NULL) \
cv_wait(list##_cond, list##_lock); \
} else { \
(adreq) = TAILQ_FIRST(list); \
if ((adreq) == NULL) { \
cv_timedwait(list##_cond, list##_lock, \
(timeout)); \
(adreq) = TAILQ_FIRST(list); \
} \
} \
if ((adreq) != NULL) \
TAILQ_REMOVE((list), (adreq), adr_next); \
mtx_unlock(list##_lock); \
} while (0)
#define QUEUE_INSERT(adreq, list) do { \
bool _wakeup; \
\
mtx_lock(list##_lock); \
_wakeup = TAILQ_EMPTY(list); \
TAILQ_INSERT_TAIL((list), (adreq), adr_next); \
mtx_unlock(list##_lock); \
if (_wakeup) \
cv_signal(list##_cond); \
} while (0)
#define QUEUE_WAIT(list) do { \
mtx_lock(list##_lock); \
while (TAILQ_EMPTY(list)) \
cv_wait(list##_cond, list##_lock); \
mtx_unlock(list##_lock); \
} while (0)
extern const char *cfgpath;
extern bool sigexit_received;
extern struct pidfh *pfh;
void descriptors_cleanup(struct adist_host *adhost);
void descriptors_assert(const struct adist_host *adhost, int pjdlogmode);
void adist_sender(struct adist_config *config, struct adist_host *adhost);
void adist_receiver(struct adist_config *config, struct adist_host *adhost);
struct adist_config *yy_config_parse(const char *config, bool exitonerror);
void yy_config_free(struct adist_config *config);
void yyerror(const char *);
int yylex(void);
#endif /* !_AUDITDISTD_H_ */
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