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1 /*-
2  * Copyright (c) 2012 The FreeBSD Foundation
3  * All rights reserved.
4  *
5  * This software was developed by Edward Tomasz Napierala under sponsorship
6  * from the FreeBSD Foundation.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31
32 #ifndef ISCSID_H
33 #define ISCSID_H
34
35 #include <stdbool.h>
36 #include <stdint.h>
37
38 #include <iscsi_ioctl.h>
39
40 #define DEFAULT_PIDFILE                 "/var/run/iscsid.pid"
41
42 #define CONN_DIGEST_NONE                0
43 #define CONN_DIGEST_CRC32C              1
44
45 #define CONN_MUTUAL_CHALLENGE_LEN       1024
46
47 struct connection {
48         int                     conn_iscsi_fd;
49 #ifndef ICL_KERNEL_PROXY
50         int                     conn_socket;
51 #endif
52         unsigned int            conn_session_id;
53         struct iscsi_session_conf       conn_conf;
54         char                    conn_target_alias[ISCSI_ADDR_LEN];
55         uint8_t                 conn_isid[6];
56         uint32_t                conn_statsn;
57         int                     conn_header_digest;
58         int                     conn_data_digest;
59         bool                    conn_initial_r2t;
60         bool                    conn_immediate_data;
61         size_t                  conn_max_data_segment_length;
62         size_t                  conn_max_burst_length;
63         size_t                  conn_first_burst_length;
64         char                    conn_mutual_challenge[CONN_MUTUAL_CHALLENGE_LEN];
65         unsigned char           conn_mutual_id;
66 };
67
68 struct pdu {
69         struct connection       *pdu_connection;
70         struct iscsi_bhs        *pdu_bhs;
71         char                    *pdu_data;
72         size_t                  pdu_data_len;
73 };
74
75 #define KEYS_MAX                1024
76
77 struct keys {
78         char                    *keys_names[KEYS_MAX];
79         char                    *keys_values[KEYS_MAX];
80         char                    *keys_data;
81         size_t                  keys_data_len;
82 };
83
84 struct keys             *keys_new(void);
85 void                    keys_delete(struct keys *key);
86 void                    keys_load(struct keys *keys, const struct pdu *pdu);
87 void                    keys_save(struct keys *keys, struct pdu *pdu);
88 const char              *keys_find(struct keys *keys, const char *name);
89 int                     keys_find_int(struct keys *keys, const char *name);
90 void                    keys_add(struct keys *keys,
91                             const char *name, const char *value);
92 void                    keys_add_int(struct keys *keys,
93                             const char *name, int value);
94
95 struct pdu              *pdu_new(struct connection *ic);
96 struct pdu              *pdu_new_response(struct pdu *request);
97 void                    pdu_receive(struct pdu *request);
98 void                    pdu_send(struct pdu *response);
99 void                    pdu_delete(struct pdu *ip);
100
101 void                    login(struct connection *ic);
102
103 void                    discovery(struct connection *ic);
104
105 void                    log_init(int level);
106 void                    log_set_peer_name(const char *name);
107 void                    log_set_peer_addr(const char *addr);
108 void                    log_err(int, const char *, ...)
109                             __dead2 __printf0like(2, 3);
110 void                    log_errx(int, const char *, ...)
111                             __dead2 __printf0like(2, 3);
112 void                    log_warn(const char *, ...) __printf0like(1, 2);
113 void                    log_warnx(const char *, ...) __printflike(1, 2);
114 void                    log_debugx(const char *, ...) __printf0like(1, 2);
115
116 char                    *checked_strdup(const char *);
117 bool                    timed_out(void);
118 void                    fail(const struct connection *, const char *);
119
120 #endif /* !ISCSID_H */