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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 The FreeBSD Foundation
*
* This software was developed by Edward Tomasz Napierala 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 AUTHOR 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 AUTHOR 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.
*/
#ifndef __LIBISCSIUTIL_H__
#define __LIBISCSIUTIL_H__
#include <sys/types.h>
#include <stdbool.h>
struct connection_ops;
#define CONN_DIGEST_NONE 0
#define CONN_DIGEST_CRC32C 1
struct connection {
const struct connection_ops *conn_ops;
int conn_socket;
uint8_t conn_isid[6];
uint16_t conn_tsih;
uint32_t conn_cmdsn;
uint32_t conn_statsn;
int conn_header_digest;
int conn_data_digest;
bool conn_immediate_data;
bool conn_use_proxy;
int conn_max_recv_data_segment_length;
int conn_max_send_data_segment_length;
int conn_max_burst_length;
int conn_first_burst_length;
};
struct pdu {
struct connection *pdu_connection;
struct iscsi_bhs *pdu_bhs;
char *pdu_data;
size_t pdu_data_len;
};
struct connection_ops {
bool (*timed_out)(void);
void (*pdu_receive_proxy)(struct pdu *);
void (*pdu_send_proxy)(struct pdu *);
void (*fail)(const struct connection *, const char *);
};
#define KEYS_MAX 1024
struct keys {
char *keys_names[KEYS_MAX];
char *keys_values[KEYS_MAX];
};
#define CHAP_CHALLENGE_LEN 1024
#define CHAP_DIGEST_LEN 16 /* Equal to MD5 digest size. */
struct chap {
unsigned char chap_id;
char chap_challenge[CHAP_CHALLENGE_LEN];
char chap_response[CHAP_DIGEST_LEN];
};
struct rchap {
char *rchap_secret;
unsigned char rchap_id;
void *rchap_challenge;
size_t rchap_challenge_len;
};
struct chap *chap_new(void);
char *chap_get_id(const struct chap *chap);
char *chap_get_challenge(const struct chap *chap);
int chap_receive(struct chap *chap, const char *response);
int chap_authenticate(struct chap *chap,
const char *secret);
void chap_delete(struct chap *chap);
struct rchap *rchap_new(const char *secret);
int rchap_receive(struct rchap *rchap,
const char *id, const char *challenge);
char *rchap_get_response(struct rchap *rchap);
void rchap_delete(struct rchap *rchap);
struct keys *keys_new(void);
void keys_delete(struct keys *key);
void keys_load(struct keys *keys, const char *data,
size_t len);
void keys_save(struct keys *keys, char **datap,
size_t *lenp);
const char *keys_find(struct keys *keys, const char *name);
void keys_add(struct keys *keys,
const char *name, const char *value);
void keys_add_int(struct keys *keys,
const char *name, int value);
static __inline void
keys_load_pdu(struct keys *keys, const struct pdu *pdu)
{
keys_load(keys, pdu->pdu_data, pdu->pdu_data_len);
}
static __inline void
keys_save_pdu(struct keys *keys, struct pdu *pdu)
{
keys_save(keys, &pdu->pdu_data, &pdu->pdu_data_len);
}
struct pdu *pdu_new(struct connection *ic);
struct pdu *pdu_new_response(struct pdu *request);
int pdu_ahs_length(const struct pdu *pdu);
int pdu_data_segment_length(const struct pdu *pdu);
void pdu_set_data_segment_length(struct pdu *pdu,
uint32_t len);
void pdu_receive(struct pdu *request);
void pdu_send(struct pdu *response);
void pdu_delete(struct pdu *ip);
void text_send_request(struct connection *conn,
struct keys *request_keys);
struct keys * text_read_response(struct connection *conn);
struct keys * text_read_request(struct connection *conn,
struct pdu **requestp);
void text_send_response(struct pdu *request,
struct keys *response_keys);
void connection_init(struct connection *conn,
const struct connection_ops *ops, bool use_proxy);
void log_init(int level);
void log_set_peer_name(const char *name);
void log_set_peer_addr(const char *addr);
void log_err(int, const char *, ...)
__dead2 __printflike(2, 3);
void log_errx(int, const char *, ...)
__dead2 __printflike(2, 3);
void log_warn(const char *, ...) __printflike(1, 2);
void log_warnx(const char *, ...) __printflike(1, 2);
void log_debugx(const char *, ...) __printflike(1, 2);
char *checked_strdup(const char *);
#endif /* !__LIBISCSIUTIL_H__ */
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