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 size_t conn_max_data_segment_length; 63 size_t conn_max_burst_length; 64 size_t conn_first_burst_length; 65 struct chap *conn_mutual_chap; 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 #define CHAP_CHALLENGE_LEN 1024 85 #define CHAP_DIGEST_LEN 16 /* Equal to MD5 digest size. */ 86 87 struct chap { 88 unsigned char chap_id; 89 char chap_challenge[CHAP_CHALLENGE_LEN]; 90 char chap_response[CHAP_DIGEST_LEN]; 91 }; 92 93 struct rchap { 94 char *rchap_secret; 95 unsigned char rchap_id; 96 void *rchap_challenge; 97 size_t rchap_challenge_len; 98 }; 99 100 struct chap *chap_new(void); 101 char *chap_get_id(const struct chap *chap); 102 char *chap_get_challenge(const struct chap *chap); 103 int chap_receive(struct chap *chap, const char *response); 104 int chap_authenticate(struct chap *chap, 105 const char *secret); 106 void chap_delete(struct chap *chap); 107 108 struct rchap *rchap_new(const char *secret); 109 int rchap_receive(struct rchap *rchap, 110 const char *id, const char *challenge); 111 char *rchap_get_response(struct rchap *rchap); 112 void rchap_delete(struct rchap *rchap); 113 114 struct keys *keys_new(void); 115 void keys_delete(struct keys *key); 116 void keys_load(struct keys *keys, const struct pdu *pdu); 117 void keys_save(struct keys *keys, struct pdu *pdu); 118 const char *keys_find(struct keys *keys, const char *name); 119 void keys_add(struct keys *keys, 120 const char *name, const char *value); 121 void keys_add_int(struct keys *keys, 122 const char *name, int value); 123 124 struct pdu *pdu_new(struct connection *ic); 125 struct pdu *pdu_new_response(struct pdu *request); 126 void pdu_receive(struct pdu *request); 127 void pdu_send(struct pdu *response); 128 void pdu_delete(struct pdu *ip); 129 130 void login(struct connection *ic); 131 132 void discovery(struct connection *ic); 133 134 void log_init(int level); 135 void log_set_peer_name(const char *name); 136 void log_set_peer_addr(const char *addr); 137 void log_err(int, const char *, ...) 138 __dead2 __printflike(2, 3); 139 void log_errx(int, const char *, ...) 140 __dead2 __printflike(2, 3); 141 void log_warn(const char *, ...) __printflike(1, 2); 142 void log_warnx(const char *, ...) __printflike(1, 2); 143 void log_debugx(const char *, ...) __printflike(1, 2); 144 145 char *checked_strdup(const char *); 146 bool timed_out(void); 147 void fail(const struct connection *, const char *); 148 149 #endif /* !ISCSID_H */ 150