1 /* 2 * Copyright (c) 2008-2014, Simon Schubert <2@0x2c.org>. 3 * Copyright (c) 2008 The DragonFly Project. All rights reserved. 4 * 5 * This code is derived from software contributed to The DragonFly Project 6 * by Simon Schubert <2@0x2c.org> and 7 * Matthias Schmidt <matthias@dragonflybsd.org>. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 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 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 3. Neither the name of The DragonFly Project nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific, prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 26 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 27 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 29 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 31 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef DMA_H 38 #define DMA_H 39 40 #include <sys/types.h> 41 #include <sys/queue.h> 42 #include <sys/socket.h> 43 #include <arpa/nameser.h> 44 #include <arpa/inet.h> 45 #include <openssl/ssl.h> 46 #include <netdb.h> 47 #include <sysexits.h> 48 49 #define VERSION "DragonFly Mail Agent " DMA_VERSION 50 51 #define BUF_SIZE 2048 52 #define ERRMSG_SIZE 200 53 #define USERNAME_SIZE 50 54 #define MIN_RETRY 300 /* 5 minutes */ 55 #define MAX_RETRY (3*60*60) /* retry at least every 3 hours */ 56 #define MAX_TIMEOUT (5*24*60*60) /* give up after 5 days */ 57 #define SLEEP_TIMEOUT 30 /* check for queue flush every 30 seconds */ 58 #ifndef PATH_MAX 59 #define PATH_MAX 1024 /* Max path len */ 60 #endif 61 #define SMTP_PORT 25 /* Default SMTP port */ 62 #define CON_TIMEOUT (5*60) /* Connection timeout per RFC5321 */ 63 64 #define STARTTLS 0x002 /* StartTLS support */ 65 #define SECURETRANS 0x004 /* SSL/TLS in general */ 66 #define NOSSL 0x008 /* Do not use SSL */ 67 #define DEFER 0x010 /* Defer mails */ 68 #define INSECURE 0x020 /* Allow plain login w/o encryption */ 69 #define FULLBOUNCE 0x040 /* Bounce the full message */ 70 #define TLS_OPP 0x080 /* Opportunistic STARTTLS */ 71 #define NULLCLIENT 0x100 /* Nullclient support */ 72 73 #ifndef CONF_PATH 74 #error Please define CONF_PATH 75 #endif 76 77 #ifndef LIBEXEC_PATH 78 #error Please define LIBEXEC_PATH 79 #endif 80 81 #define SPOOL_FLUSHFILE "flush" 82 83 #ifndef DMA_ROOT_USER 84 #define DMA_ROOT_USER "mail" 85 #endif 86 #ifndef DMA_GROUP 87 #define DMA_GROUP "mail" 88 #endif 89 90 #ifndef MBOX_STRICT 91 #define MBOX_STRICT 0 92 #endif 93 94 95 struct stritem { 96 SLIST_ENTRY(stritem) next; 97 char *str; 98 }; 99 SLIST_HEAD(strlist, stritem); 100 101 struct alias { 102 LIST_ENTRY(alias) next; 103 char *alias; 104 struct strlist dests; 105 }; 106 LIST_HEAD(aliases, alias); 107 108 struct qitem { 109 LIST_ENTRY(qitem) next; 110 const char *sender; 111 char *addr; 112 char *queuefn; 113 char *mailfn; 114 char *queueid; 115 FILE *queuef; 116 FILE *mailf; 117 int remote; 118 }; 119 LIST_HEAD(queueh, qitem); 120 121 struct queue { 122 struct queueh queue; 123 char *id; 124 FILE *mailf; 125 char *tmpf; 126 const char *sender; 127 }; 128 129 struct config { 130 const char *smarthost; 131 int port; 132 const char *aliases; 133 const char *spooldir; 134 const char *authpath; 135 const char *certfile; 136 int features; 137 const char *mailname; 138 const char *masquerade_host; 139 const char *masquerade_user; 140 141 /* XXX does not belong into config */ 142 SSL *ssl; 143 }; 144 145 146 struct authuser { 147 SLIST_ENTRY(authuser) next; 148 char *login; 149 char *password; 150 char *host; 151 }; 152 SLIST_HEAD(authusers, authuser); 153 154 155 struct mx_hostentry { 156 char host[MAXDNAME]; 157 char addr[INET6_ADDRSTRLEN]; 158 int pref; 159 struct addrinfo ai; 160 struct sockaddr_storage sa; 161 }; 162 163 164 /* global variables */ 165 extern struct aliases aliases; 166 extern struct config config; 167 extern struct strlist tmpfs; 168 extern struct authusers authusers; 169 extern char username[USERNAME_SIZE]; 170 extern uid_t useruid; 171 extern const char *logident_base; 172 173 extern char neterr[ERRMSG_SIZE]; 174 extern char errmsg[ERRMSG_SIZE]; 175 176 /* aliases_parse.y */ 177 int yyparse(void); 178 int yywrap(void); 179 int yylex(void); 180 extern FILE *yyin; 181 182 /* conf.c */ 183 void trim_line(char *); 184 void parse_conf(const char *); 185 void parse_authfile(const char *); 186 187 /* crypto.c */ 188 void hmac_md5(unsigned char *, int, unsigned char *, int, unsigned char *); 189 int smtp_auth_md5(int, char *, char *); 190 int smtp_init_crypto(int, int); 191 192 /* dns.c */ 193 int dns_get_mx_list(const char *, int, struct mx_hostentry **, int); 194 195 /* net.c */ 196 char *ssl_errstr(void); 197 int read_remote(int, int, char *); 198 ssize_t send_remote_command(int, const char*, ...) __attribute__((__nonnull__(2), __format__ (__printf__, 2, 3))); 199 int deliver_remote(struct qitem *); 200 201 /* base64.c */ 202 int base64_encode(const void *, int, char **); 203 int base64_decode(const char *, void *); 204 205 /* dma.c */ 206 #define EXPAND_ADDR 1 207 #define EXPAND_WILDCARD 2 208 int add_recp(struct queue *, const char *, int); 209 void run_queue(struct queue *); 210 211 /* spool.c */ 212 int newspoolf(struct queue *); 213 int linkspool(struct queue *); 214 int load_queue(struct queue *); 215 void delqueue(struct qitem *); 216 int acquirespool(struct qitem *); 217 void dropspool(struct queue *, struct qitem *); 218 int flushqueue_since(unsigned int); 219 int flushqueue_signal(void); 220 221 /* local.c */ 222 int deliver_local(struct qitem *); 223 224 /* mail.c */ 225 void bounce(struct qitem *, const char *); 226 int readmail(struct queue *, int, int); 227 228 /* util.c */ 229 const char *hostname(void); 230 void setlogident(const char *, ...) __attribute__((__format__ (__printf__, 1, 2))); 231 void errlog(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3))); 232 void errlogx(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3))); 233 void set_username(void); 234 void deltmp(void); 235 int do_timeout(int, int); 236 int open_locked(const char *, int, ...); 237 char *rfc822date(void); 238 int strprefixcmp(const char *, const char *); 239 void init_random(void); 240 241 #endif 242