1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Edward Tomasz Napierala under sponsorship 8 * from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 #ifndef ISCSID_H 35 #define ISCSID_H 36 37 #include <stdbool.h> 38 #include <stdint.h> 39 40 #include <iscsi_ioctl.h> 41 42 #define DEFAULT_PIDFILE "/var/run/iscsid.pid" 43 44 #define CONN_DIGEST_NONE 0 45 #define CONN_DIGEST_CRC32C 1 46 47 #define CONN_MUTUAL_CHALLENGE_LEN 1024 48 #define SOCKBUF_SIZE 1048576 49 50 struct connection { 51 int conn_iscsi_fd; 52 int conn_socket; 53 unsigned int conn_session_id; 54 struct iscsi_session_conf conn_conf; 55 struct iscsi_session_limits conn_limits; 56 char conn_target_alias[ISCSI_ADDR_LEN]; 57 uint8_t conn_isid[6]; 58 uint16_t conn_tsih; 59 uint32_t conn_statsn; 60 int conn_header_digest; 61 int conn_data_digest; 62 bool conn_initial_r2t; 63 bool conn_immediate_data; 64 int conn_max_recv_data_segment_length; 65 int conn_max_send_data_segment_length; 66 int conn_max_burst_length; 67 int conn_first_burst_length; 68 struct chap *conn_mutual_chap; 69 }; 70 71 struct pdu { 72 struct connection *pdu_connection; 73 struct iscsi_bhs *pdu_bhs; 74 char *pdu_data; 75 size_t pdu_data_len; 76 }; 77 78 #define KEYS_MAX 1024 79 80 struct keys { 81 char *keys_names[KEYS_MAX]; 82 char *keys_values[KEYS_MAX]; 83 char *keys_data; 84 size_t keys_data_len; 85 }; 86 87 #define CHAP_CHALLENGE_LEN 1024 88 #define CHAP_DIGEST_LEN 16 /* Equal to MD5 digest size. */ 89 90 struct chap { 91 unsigned char chap_id; 92 char chap_challenge[CHAP_CHALLENGE_LEN]; 93 char chap_response[CHAP_DIGEST_LEN]; 94 }; 95 96 struct rchap { 97 char *rchap_secret; 98 unsigned char rchap_id; 99 void *rchap_challenge; 100 size_t rchap_challenge_len; 101 }; 102 103 struct chap *chap_new(void); 104 char *chap_get_id(const struct chap *chap); 105 char *chap_get_challenge(const struct chap *chap); 106 int chap_receive(struct chap *chap, const char *response); 107 int chap_authenticate(struct chap *chap, 108 const char *secret); 109 void chap_delete(struct chap *chap); 110 111 struct rchap *rchap_new(const char *secret); 112 int rchap_receive(struct rchap *rchap, 113 const char *id, const char *challenge); 114 char *rchap_get_response(struct rchap *rchap); 115 void rchap_delete(struct rchap *rchap); 116 117 struct keys *keys_new(void); 118 void keys_delete(struct keys *key); 119 void keys_load(struct keys *keys, const struct pdu *pdu); 120 void keys_save(struct keys *keys, struct pdu *pdu); 121 const char *keys_find(struct keys *keys, const char *name); 122 void keys_add(struct keys *keys, 123 const char *name, const char *value); 124 void keys_add_int(struct keys *keys, 125 const char *name, int value); 126 127 struct pdu *pdu_new(struct connection *ic); 128 struct pdu *pdu_new_response(struct pdu *request); 129 void pdu_receive(struct pdu *request); 130 void pdu_send(struct pdu *response); 131 void pdu_delete(struct pdu *ip); 132 133 void login(struct connection *ic); 134 135 void discovery(struct connection *ic); 136 137 void log_init(int level); 138 void log_set_peer_name(const char *name); 139 void log_set_peer_addr(const char *addr); 140 void log_err(int, const char *, ...) 141 __dead2 __printflike(2, 3); 142 void log_errx(int, const char *, ...) 143 __dead2 __printflike(2, 3); 144 void log_warn(const char *, ...) __printflike(1, 2); 145 void log_warnx(const char *, ...) __printflike(1, 2); 146 void log_debugx(const char *, ...) __printflike(1, 2); 147 148 char *checked_strdup(const char *); 149 bool timed_out(void); 150 void fail(const struct connection *, const char *); 151 152 #endif /* !ISCSID_H */ 153