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 #define SOCKBUF_SIZE 1048576 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 struct iscsi_session_limits conn_limits; 54 char conn_target_alias[ISCSI_ADDR_LEN]; 55 uint8_t conn_isid[6]; 56 uint16_t conn_tsih; 57 uint32_t conn_statsn; 58 int conn_header_digest; 59 int conn_data_digest; 60 bool conn_initial_r2t; 61 bool conn_immediate_data; 62 int conn_max_recv_data_segment_length; 63 int conn_max_send_data_segment_length; 64 int conn_max_burst_length; 65 int conn_first_burst_length; 66 struct chap *conn_mutual_chap; 67 }; 68 69 struct pdu { 70 struct connection *pdu_connection; 71 struct iscsi_bhs *pdu_bhs; 72 char *pdu_data; 73 size_t pdu_data_len; 74 }; 75 76 #define KEYS_MAX 1024 77 78 struct keys { 79 char *keys_names[KEYS_MAX]; 80 char *keys_values[KEYS_MAX]; 81 char *keys_data; 82 size_t keys_data_len; 83 }; 84 85 #define CHAP_CHALLENGE_LEN 1024 86 #define CHAP_DIGEST_LEN 16 /* Equal to MD5 digest size. */ 87 88 struct chap { 89 unsigned char chap_id; 90 char chap_challenge[CHAP_CHALLENGE_LEN]; 91 char chap_response[CHAP_DIGEST_LEN]; 92 }; 93 94 struct rchap { 95 char *rchap_secret; 96 unsigned char rchap_id; 97 void *rchap_challenge; 98 size_t rchap_challenge_len; 99 }; 100 101 struct chap *chap_new(void); 102 char *chap_get_id(const struct chap *chap); 103 char *chap_get_challenge(const struct chap *chap); 104 int chap_receive(struct chap *chap, const char *response); 105 int chap_authenticate(struct chap *chap, 106 const char *secret); 107 void chap_delete(struct chap *chap); 108 109 struct rchap *rchap_new(const char *secret); 110 int rchap_receive(struct rchap *rchap, 111 const char *id, const char *challenge); 112 char *rchap_get_response(struct rchap *rchap); 113 void rchap_delete(struct rchap *rchap); 114 115 struct keys *keys_new(void); 116 void keys_delete(struct keys *key); 117 void keys_load(struct keys *keys, const struct pdu *pdu); 118 void keys_save(struct keys *keys, struct pdu *pdu); 119 const char *keys_find(struct keys *keys, const char *name); 120 void keys_add(struct keys *keys, 121 const char *name, const char *value); 122 void keys_add_int(struct keys *keys, 123 const char *name, int value); 124 125 struct pdu *pdu_new(struct connection *ic); 126 struct pdu *pdu_new_response(struct pdu *request); 127 void pdu_receive(struct pdu *request); 128 void pdu_send(struct pdu *response); 129 void pdu_delete(struct pdu *ip); 130 131 void login(struct connection *ic); 132 133 void discovery(struct connection *ic); 134 135 void log_init(int level); 136 void log_set_peer_name(const char *name); 137 void log_set_peer_addr(const char *addr); 138 void log_err(int, const char *, ...) 139 __dead2 __printflike(2, 3); 140 void log_errx(int, const char *, ...) 141 __dead2 __printflike(2, 3); 142 void log_warn(const char *, ...) __printflike(1, 2); 143 void log_warnx(const char *, ...) __printflike(1, 2); 144 void log_debugx(const char *, ...) __printflike(1, 2); 145 146 char *checked_strdup(const char *); 147 bool timed_out(void); 148 void fail(const struct connection *, const char *); 149 150 #endif /* !ISCSID_H */ 151