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 #include <openssl/md5.h> 38 39 #include <iscsi_ioctl.h> 40 41 #define DEFAULT_PIDFILE "/var/run/iscsid.pid" 42 43 #define CONN_DIGEST_NONE 0 44 #define CONN_DIGEST_CRC32C 1 45 46 #define CONN_MUTUAL_CHALLENGE_LEN 1024 47 48 struct connection { 49 int conn_iscsi_fd; 50 int conn_socket; 51 unsigned int conn_session_id; 52 struct iscsi_session_conf conn_conf; 53 char conn_target_alias[ISCSI_ADDR_LEN]; 54 uint8_t conn_isid[6]; 55 uint16_t conn_tsih; 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 struct chap *conn_mutual_chap; 65 }; 66 67 struct pdu { 68 struct connection *pdu_connection; 69 struct iscsi_bhs *pdu_bhs; 70 char *pdu_data; 71 size_t pdu_data_len; 72 }; 73 74 #define KEYS_MAX 1024 75 76 struct keys { 77 char *keys_names[KEYS_MAX]; 78 char *keys_values[KEYS_MAX]; 79 char *keys_data; 80 size_t keys_data_len; 81 }; 82 83 #define CHAP_CHALLENGE_LEN 1024 84 85 struct chap { 86 unsigned char chap_id; 87 char chap_challenge[CHAP_CHALLENGE_LEN]; 88 char chap_response[MD5_DIGEST_LENGTH]; 89 }; 90 91 struct rchap { 92 char *rchap_secret; 93 unsigned char rchap_id; 94 void *rchap_challenge; 95 size_t rchap_challenge_len; 96 }; 97 98 struct chap *chap_new(void); 99 char *chap_get_id(const struct chap *chap); 100 char *chap_get_challenge(const struct chap *chap); 101 int chap_receive(struct chap *chap, const char *response); 102 int chap_authenticate(struct chap *chap, 103 const char *secret); 104 void chap_delete(struct chap *chap); 105 106 struct rchap *rchap_new(const char *secret); 107 int rchap_receive(struct rchap *rchap, 108 const char *id, const char *challenge); 109 char *rchap_get_response(struct rchap *rchap); 110 void rchap_delete(struct rchap *rchap); 111 112 struct keys *keys_new(void); 113 void keys_delete(struct keys *key); 114 void keys_load(struct keys *keys, const struct pdu *pdu); 115 void keys_save(struct keys *keys, struct pdu *pdu); 116 const char *keys_find(struct keys *keys, const char *name); 117 int keys_find_int(struct keys *keys, const char *name); 118 void keys_add(struct keys *keys, 119 const char *name, const char *value); 120 void keys_add_int(struct keys *keys, 121 const char *name, int value); 122 123 struct pdu *pdu_new(struct connection *ic); 124 struct pdu *pdu_new_response(struct pdu *request); 125 void pdu_receive(struct pdu *request); 126 void pdu_send(struct pdu *response); 127 void pdu_delete(struct pdu *ip); 128 129 void login(struct connection *ic); 130 131 void discovery(struct connection *ic); 132 133 void log_init(int level); 134 void log_set_peer_name(const char *name); 135 void log_set_peer_addr(const char *addr); 136 void log_err(int, const char *, ...) 137 __dead2 __printflike(2, 3); 138 void log_errx(int, const char *, ...) 139 __dead2 __printflike(2, 3); 140 void log_warn(const char *, ...) __printflike(1, 2); 141 void log_warnx(const char *, ...) __printflike(1, 2); 142 void log_debugx(const char *, ...) __printflike(1, 2); 143 144 char *checked_strdup(const char *); 145 bool timed_out(void); 146 void fail(const struct connection *, const char *); 147 148 #endif /* !ISCSID_H */ 149