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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 SUDOERS_LOG_CLIENT_H
#define SUDOERS_LOG_CLIENT_H
#include <netinet/in.h> /* for INET6?_ADDRSTRLEN */
#if defined(HAVE_OPENSSL)
# include <openssl/ssl.h>
#endif /* HAVE_OPENSSL */
#include "log_server.pb-c.h"
#include "strlist.h"
#if PROTOBUF_C_VERSION_NUMBER < 1003000
# error protobuf-c version 1.30 or higher required
#endif
/* Default ports to listen on */
#define DEFAULT_PORT "30343"
#define DEFAULT_PORT_TLS "30344"
/* Maximum message size (2Mb) */
#define MESSAGE_SIZE_MAX (2 * 1024 * 1024)
/* TODO - share with logsrvd/sendlog */
struct connection_buffer {
TAILQ_ENTRY(connection_buffer) entries;
uint8_t *data;
unsigned int size;
unsigned int len;
unsigned int off;
};
TAILQ_HEAD(connection_buffer_list, connection_buffer);
struct log_details {
struct eventlog *evlog;
struct sudoers_str_list *log_servers;
struct timespec server_timeout;
#if defined(HAVE_OPENSSL)
char *ca_bundle;
char *cert_file;
char *key_file;
#endif /* HAVE_OPENSSL */
bool keepalive;
bool verify_server;
bool ignore_log_errors;
};
enum client_state {
ERROR,
RECV_HELLO,
SEND_RESTART, /* TODO: currently unimplemented */
SEND_ACCEPT,
SEND_ALERT,
SEND_REJECT,
SEND_IO,
SEND_EXIT,
CLOSING,
FINISHED
};
/* Remote connection closure, non-zero fields must come first. */
struct client_closure {
int sock;
bool read_instead_of_write;
bool write_instead_of_read;
bool temporary_write_event;
bool disabled;
bool log_io;
char *server_name;
#if defined(HAVE_STRUCT_IN6_ADDR)
char server_ip[INET6_ADDRSTRLEN];
#else
char server_ip[INET_ADDRSTRLEN];
#endif
#if defined(HAVE_OPENSSL)
SSL_CTX *ssl_ctx;
SSL *ssl;
bool ssl_initialized;
#endif /* HAVE_OPENSSL */
enum client_state state;
enum client_state initial_state; /* XXX - bad name */
struct connection_buffer_list write_bufs;
struct connection_buffer_list free_bufs;
struct connection_buffer read_buf;
struct sudo_plugin_event *read_ev;
struct sudo_plugin_event *write_ev;
struct log_details *log_details;
struct timespec start_time;
struct timespec elapsed;
struct timespec committed;
char *iolog_id;
const char *reason;
};
/* iolog_client.c */
struct client_closure *log_server_open(struct log_details *details, struct timespec *now, bool log_io, enum client_state initial_state, const char *reason, struct sudo_plugin_event * (*event_alloc)(void));
bool log_server_close(struct client_closure *closure, int exit_status, int error);
bool fmt_client_message(struct client_closure *closure, ClientMessage *msg);
bool fmt_exit_message(struct client_closure *closure, int exit_status, int error);
bool fmt_io_buf(struct client_closure *closure, int type, const char *buf, unsigned int len, struct timespec *delay);
bool fmt_suspend(struct client_closure *closure, const char *signame, struct timespec *delay);
bool fmt_winsize(struct client_closure *closure, unsigned int lines, unsigned int cols, struct timespec *delay);
bool log_server_connect(struct client_closure *closure);
void client_closure_free(struct client_closure *closure);
bool read_server_hello(struct client_closure *closure);
#endif /* SUDOERS_LOG_CLIENT_H */
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