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https://github.com/freebsd/freebsd-src
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6378393308
Move some of the code duplicated between ctld(8) and iscsid(8) into a libiscsiutil library. Sharing the low-level PDU code did require having a 'struct connection' base class with a method table to permit separate initiator vs target behavior (e.g. in handling proxy PDUs). Reviewed by: mav, emaste Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D33544
149 lines
4.7 KiB
C
149 lines
4.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2012 The FreeBSD Foundation
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __LIBISCSIUTIL_H__
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#define __LIBISCSIUTIL_H__
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#include <sys/types.h>
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#include <stdbool.h>
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struct connection_ops;
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#define CONN_DIGEST_NONE 0
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#define CONN_DIGEST_CRC32C 1
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struct connection {
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const struct connection_ops *conn_ops;
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int conn_socket;
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uint8_t conn_isid[6];
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uint16_t conn_tsih;
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uint32_t conn_cmdsn;
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uint32_t conn_statsn;
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int conn_header_digest;
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int conn_data_digest;
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bool conn_immediate_data;
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bool conn_use_proxy;
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int conn_max_recv_data_segment_length;
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int conn_max_send_data_segment_length;
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int conn_max_burst_length;
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int conn_first_burst_length;
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};
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struct pdu {
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struct connection *pdu_connection;
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struct iscsi_bhs *pdu_bhs;
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char *pdu_data;
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size_t pdu_data_len;
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};
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struct connection_ops {
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bool (*timed_out)(void);
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void (*pdu_receive_proxy)(struct pdu *);
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void (*pdu_send_proxy)(struct pdu *);
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void (*fail)(const struct connection *, const char *);
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};
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#define KEYS_MAX 1024
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struct keys {
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char *keys_names[KEYS_MAX];
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char *keys_values[KEYS_MAX];
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char *keys_data;
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size_t keys_data_len;
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};
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#define CHAP_CHALLENGE_LEN 1024
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#define CHAP_DIGEST_LEN 16 /* Equal to MD5 digest size. */
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struct chap {
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unsigned char chap_id;
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char chap_challenge[CHAP_CHALLENGE_LEN];
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char chap_response[CHAP_DIGEST_LEN];
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};
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struct rchap {
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char *rchap_secret;
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unsigned char rchap_id;
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void *rchap_challenge;
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size_t rchap_challenge_len;
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};
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struct chap *chap_new(void);
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char *chap_get_id(const struct chap *chap);
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char *chap_get_challenge(const struct chap *chap);
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int chap_receive(struct chap *chap, const char *response);
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int chap_authenticate(struct chap *chap,
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const char *secret);
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void chap_delete(struct chap *chap);
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struct rchap *rchap_new(const char *secret);
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int rchap_receive(struct rchap *rchap,
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const char *id, const char *challenge);
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char *rchap_get_response(struct rchap *rchap);
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void rchap_delete(struct rchap *rchap);
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struct keys *keys_new(void);
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void keys_delete(struct keys *key);
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void keys_load(struct keys *keys, const struct pdu *pdu);
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void keys_save(struct keys *keys, struct pdu *pdu);
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const char *keys_find(struct keys *keys, const char *name);
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void keys_add(struct keys *keys,
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const char *name, const char *value);
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void keys_add_int(struct keys *keys,
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const char *name, int value);
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struct pdu *pdu_new(struct connection *ic);
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struct pdu *pdu_new_response(struct pdu *request);
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int pdu_ahs_length(const struct pdu *pdu);
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int pdu_data_segment_length(const struct pdu *pdu);
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void pdu_set_data_segment_length(struct pdu *pdu,
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uint32_t len);
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void pdu_receive(struct pdu *request);
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void pdu_send(struct pdu *response);
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void pdu_delete(struct pdu *ip);
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void connection_init(struct connection *conn,
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const struct connection_ops *ops, bool use_proxy);
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void log_init(int level);
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void log_set_peer_name(const char *name);
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void log_set_peer_addr(const char *addr);
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void log_err(int, const char *, ...)
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__dead2 __printflike(2, 3);
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void log_errx(int, const char *, ...)
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__dead2 __printflike(2, 3);
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void log_warn(const char *, ...) __printflike(1, 2);
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void log_warnx(const char *, ...) __printflike(1, 2);
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void log_debugx(const char *, ...) __printflike(1, 2);
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char *checked_strdup(const char *);
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#endif /* !__LIBISCSIUTIL_H__ */
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