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 48 #define VERSION "DragonFly Mail Agent " DMA_VERSION 49 50 #define BUF_SIZE 2048 51 #define ERRMSG_SIZE 200 52 #define USERNAME_SIZE 50 53 #define MIN_RETRY 300 /* 5 minutes */ 54 #define MAX_RETRY (3*60*60) /* retry at least every 3 hours */ 55 #define MAX_TIMEOUT (5*24*60*60) /* give up after 5 days */ 56 #define SLEEP_TIMEOUT 30 /* check for queue flush every 30 seconds */ 57 #ifndef PATH_MAX 58 #define PATH_MAX 1024 /* Max path len */ 59 #endif 60 #define SMTP_PORT 25 /* Default SMTP port */ 61 #define CON_TIMEOUT (5*60) /* Connection timeout per RFC5321 */ 62 63 #define STARTTLS 0x002 /* StartTLS support */ 64 #define SECURETRANS 0x004 /* SSL/TLS in general */ 65 #define NOSSL 0x008 /* Do not use SSL */ 66 #define DEFER 0x010 /* Defer mails */ 67 #define INSECURE 0x020 /* Allow plain login w/o encryption */ 68 #define FULLBOUNCE 0x040 /* Bounce the full message */ 69 #define TLS_OPP 0x080 /* Opportunistic STARTTLS */ 70 #define NULLCLIENT 0x100 /* Nullclient support */ 71 72 #ifndef CONF_PATH 73 #error Please define CONF_PATH 74 #endif 75 76 #ifndef LIBEXEC_PATH 77 #error Please define LIBEXEC_PATH 78 #endif 79 80 #define SPOOL_FLUSHFILE "flush" 81 82 #ifndef DMA_ROOT_USER 83 #define DMA_ROOT_USER "mail" 84 #endif 85 #ifndef DMA_GROUP 86 #define DMA_GROUP "mail" 87 #endif 88 89 #ifndef MBOX_STRICT 90 #define MBOX_STRICT 0 91 #endif 92 93 94 struct stritem { 95 SLIST_ENTRY(stritem) next; 96 char *str; 97 }; 98 SLIST_HEAD(strlist, stritem); 99 100 struct alias { 101 LIST_ENTRY(alias) next; 102 char *alias; 103 struct strlist dests; 104 }; 105 LIST_HEAD(aliases, alias); 106 107 struct qitem { 108 LIST_ENTRY(qitem) next; 109 const char *sender; 110 char *addr; 111 char *queuefn; 112 char *mailfn; 113 char *queueid; 114 FILE *queuef; 115 FILE *mailf; 116 int remote; 117 }; 118 LIST_HEAD(queueh, qitem); 119 120 struct queue { 121 struct queueh queue; 122 char *id; 123 FILE *mailf; 124 char *tmpf; 125 const char *sender; 126 }; 127 128 struct config { 129 const char *smarthost; 130 int port; 131 const char *aliases; 132 const char *spooldir; 133 const char *authpath; 134 const char *certfile; 135 int features; 136 const char *mailname; 137 const char *masquerade_host; 138 const char *masquerade_user; 139 140 /* XXX does not belong into config */ 141 SSL *ssl; 142 }; 143 144 145 struct authuser { 146 SLIST_ENTRY(authuser) next; 147 char *login; 148 char *password; 149 char *host; 150 }; 151 SLIST_HEAD(authusers, authuser); 152 153 154 struct mx_hostentry { 155 char host[MAXDNAME]; 156 char addr[INET6_ADDRSTRLEN]; 157 int pref; 158 struct addrinfo ai; 159 struct sockaddr_storage sa; 160 }; 161 162 163 /* global variables */ 164 extern struct aliases aliases; 165 extern struct config config; 166 extern struct strlist tmpfs; 167 extern struct authusers authusers; 168 extern char username[USERNAME_SIZE]; 169 extern uid_t useruid; 170 extern const char *logident_base; 171 172 extern char neterr[ERRMSG_SIZE]; 173 extern char errmsg[ERRMSG_SIZE]; 174 175 /* aliases_parse.y */ 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 *) __attribute__((__noreturn__)); 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))) __attribute__((__noreturn__)); 228 void errlogx(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3))) __attribute__((__noreturn__)); 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