1 /* 2 * Copyright (c) 2008 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Simon 'corecode' Schubert <corecode@fs.ei.tum.de> and 6 * Matthias Schmidt <matthias@dragonflybsd.org>. 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 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 3. Neither the name of The DragonFly Project nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific, prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef DMA_H 37 #define DMA_H 38 39 #include <sys/types.h> 40 #include <sys/queue.h> 41 #include <sys/socket.h> 42 #include <arpa/nameser.h> 43 #include <arpa/inet.h> 44 #include <openssl/ssl.h> 45 #include <netdb.h> 46 47 #define VERSION "DragonFly Mail Agent " DMA_VERSION 48 49 #define BUF_SIZE 2048 50 #define ERRMSG_SIZE 200 51 #define USERNAME_SIZE 50 52 #define MIN_RETRY 300 /* 5 minutes */ 53 #define MAX_RETRY (3*60*60) /* retry at least every 3 hours */ 54 #define MAX_TIMEOUT (5*24*60*60) /* give up after 5 days */ 55 #define SLEEP_TIMEOUT 30 /* check for queue flush every 30 seconds */ 56 #ifndef PATH_MAX 57 #define PATH_MAX 1024 /* Max path len */ 58 #endif 59 #define SMTP_PORT 25 /* Default SMTP port */ 60 #define CON_TIMEOUT (5*60) /* Connection timeout per RFC5321 */ 61 62 #define STARTTLS 0x002 /* StartTLS support */ 63 #define SECURETRANS 0x004 /* SSL/TLS in general */ 64 #define NOSSL 0x008 /* Do not use SSL */ 65 #define DEFER 0x010 /* Defer mails */ 66 #define INSECURE 0x020 /* Allow plain login w/o encryption */ 67 #define FULLBOUNCE 0x040 /* Bounce the full message */ 68 #define TLS_OPP 0x080 /* Opportunistic STARTTLS */ 69 #define NULLCLIENT 0x100 /* Nullclient support */ 70 71 #ifndef CONF_PATH 72 #error Please define CONF_PATH 73 #endif 74 75 #ifndef LIBEXEC_PATH 76 #error Please define LIBEXEC_PATH 77 #endif 78 79 #define SPOOL_FLUSHFILE "flush" 80 81 #ifndef DMA_ROOT_USER 82 #define DMA_ROOT_USER "mail" 83 #endif 84 #ifndef DMA_GROUP 85 #define DMA_GROUP "mail" 86 #endif 87 88 #ifndef MBOX_STRICT 89 #define MBOX_STRICT 0 90 #endif 91 92 93 struct stritem { 94 SLIST_ENTRY(stritem) next; 95 char *str; 96 }; 97 SLIST_HEAD(strlist, stritem); 98 99 struct alias { 100 LIST_ENTRY(alias) next; 101 char *alias; 102 struct strlist dests; 103 }; 104 LIST_HEAD(aliases, alias); 105 106 struct qitem { 107 LIST_ENTRY(qitem) next; 108 const char *sender; 109 char *addr; 110 char *queuefn; 111 char *mailfn; 112 char *queueid; 113 FILE *queuef; 114 FILE *mailf; 115 int remote; 116 }; 117 LIST_HEAD(queueh, qitem); 118 119 struct queue { 120 struct queueh queue; 121 char *id; 122 FILE *mailf; 123 char *tmpf; 124 const char *sender; 125 }; 126 127 struct config { 128 const char *smarthost; 129 int port; 130 const char *aliases; 131 const char *spooldir; 132 const char *authpath; 133 const char *certfile; 134 int features; 135 const char *mailname; 136 const char *masquerade_host; 137 const char *masquerade_user; 138 139 /* XXX does not belong into config */ 140 SSL *ssl; 141 }; 142 143 144 struct authuser { 145 SLIST_ENTRY(authuser) next; 146 char *login; 147 char *password; 148 char *host; 149 }; 150 SLIST_HEAD(authusers, authuser); 151 152 153 struct mx_hostentry { 154 char host[MAXDNAME]; 155 char addr[INET6_ADDRSTRLEN]; 156 int pref; 157 struct addrinfo ai; 158 struct sockaddr_storage sa; 159 }; 160 161 162 /* global variables */ 163 extern struct aliases aliases; 164 extern struct config config; 165 extern struct strlist tmpfs; 166 extern struct authusers authusers; 167 extern char username[USERNAME_SIZE]; 168 extern uid_t useruid; 169 extern const char *logident_base; 170 171 extern char neterr[ERRMSG_SIZE]; 172 extern char errmsg[ERRMSG_SIZE]; 173 174 /* aliases_parse.y */ 175 int yyparse(void); 176 extern FILE *yyin; 177 178 /* conf.c */ 179 void trim_line(char *); 180 void parse_conf(const char *); 181 void parse_authfile(const char *); 182 183 /* crypto.c */ 184 void hmac_md5(unsigned char *, int, unsigned char *, int, unsigned char *); 185 int smtp_auth_md5(int, char *, char *); 186 int smtp_init_crypto(int, int); 187 188 /* dns.c */ 189 int dns_get_mx_list(const char *, int, struct mx_hostentry **, int); 190 191 /* net.c */ 192 char *ssl_errstr(void); 193 int read_remote(int, int, char *); 194 ssize_t send_remote_command(int, const char*, ...) __attribute__((__nonnull__(2), __format__ (__printf__, 2, 3))); 195 int deliver_remote(struct qitem *); 196 197 /* base64.c */ 198 int base64_encode(const void *, int, char **); 199 int base64_decode(const char *, void *); 200 201 /* dma.c */ 202 #define EXPAND_ADDR 1 203 #define EXPAND_WILDCARD 2 204 int add_recp(struct queue *, const char *, int); 205 void run_queue(struct queue *); 206 207 /* spool.c */ 208 int newspoolf(struct queue *); 209 int linkspool(struct queue *); 210 int load_queue(struct queue *); 211 void delqueue(struct qitem *); 212 int acquirespool(struct qitem *); 213 void dropspool(struct queue *, struct qitem *); 214 int flushqueue_since(unsigned int); 215 int flushqueue_signal(void); 216 217 /* local.c */ 218 int deliver_local(struct qitem *); 219 220 /* mail.c */ 221 void bounce(struct qitem *, const char *); 222 int readmail(struct queue *, int, int); 223 224 /* util.c */ 225 const char *hostname(void); 226 void setlogident(const char *, ...) __attribute__((__format__ (__printf__, 1, 2))); 227 void errlog(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3))); 228 void errlogx(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3))); 229 void set_username(void); 230 void deltmp(void); 231 int do_timeout(int, int); 232 int open_locked(const char *, int, ...); 233 char *rfc822date(void); 234 int strprefixcmp(const char *, const char *); 235 void init_random(void); 236 237 #endif 238