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 1024 53 #define USERNAME_SIZE 50 54 #define EHLO_RESPONSE_SIZE BUF_SIZE 55 #define MIN_RETRY 300 /* 5 minutes */ 56 #define MAX_RETRY (3*60*60) /* retry at least every 3 hours */ 57 #define MAX_TIMEOUT (5*24*60*60) /* give up after 5 days */ 58 #define SLEEP_TIMEOUT 30 /* check for queue flush every 30 seconds */ 59 #ifndef PATH_MAX 60 #define PATH_MAX 1024 /* Max path len */ 61 #endif 62 #define SMTP_PORT 25 /* Default SMTP port */ 63 #define CON_TIMEOUT (5*60) /* Connection timeout per RFC5321 */ 64 65 #define STARTTLS 0x002 /* StartTLS support */ 66 #define SECURETRANSFER 0x004 /* SSL/TLS in general */ 67 #define NOSSL 0x008 /* Do not use SSL */ 68 #define DEFER 0x010 /* Defer mails */ 69 #define INSECURE 0x020 /* Allow plain login w/o encryption */ 70 #define FULLBOUNCE 0x040 /* Bounce the full message */ 71 #define TLS_OPP 0x080 /* Opportunistic STARTTLS */ 72 #define NULLCLIENT 0x100 /* Nullclient support */ 73 74 #ifndef CONF_PATH 75 #error Please define CONF_PATH 76 #endif 77 78 #ifndef LIBEXEC_PATH 79 #error Please define LIBEXEC_PATH 80 #endif 81 82 #define SPOOL_FLUSHFILE "flush" 83 84 #ifndef DMA_ROOT_USER 85 #define DMA_ROOT_USER "mail" 86 #endif 87 #ifndef DMA_GROUP 88 #define DMA_GROUP "mail" 89 #endif 90 91 #ifndef MBOX_STRICT 92 #define MBOX_STRICT 0 93 #endif 94 95 96 struct stritem { 97 SLIST_ENTRY(stritem) next; 98 char *str; 99 }; 100 SLIST_HEAD(strlist, stritem); 101 102 struct alias { 103 LIST_ENTRY(alias) next; 104 char *alias; 105 struct strlist dests; 106 }; 107 LIST_HEAD(aliases, alias); 108 109 struct qitem { 110 LIST_ENTRY(qitem) next; 111 const char *sender; 112 char *addr; 113 char *queuefn; 114 char *mailfn; 115 char *queueid; 116 FILE *queuef; 117 FILE *mailf; 118 int remote; 119 }; 120 LIST_HEAD(queueh, qitem); 121 122 struct queue { 123 struct queueh queue; 124 char *id; 125 FILE *mailf; 126 char *tmpf; 127 const char *sender; 128 }; 129 130 struct config { 131 const char *smarthost; 132 int port; 133 const char *aliases; 134 const char *spooldir; 135 const char *authpath; 136 const char *certfile; 137 int features; 138 const char *mailname; 139 const char *masquerade_host; 140 const char *masquerade_user; 141 const unsigned char *fingerprint; 142 143 /* XXX does not belong into config */ 144 SSL *ssl; 145 }; 146 147 148 struct authuser { 149 SLIST_ENTRY(authuser) next; 150 char *login; 151 char *password; 152 char *host; 153 }; 154 SLIST_HEAD(authusers, authuser); 155 156 157 struct mx_hostentry { 158 char host[MAXDNAME]; 159 char addr[INET6_ADDRSTRLEN]; 160 int pref; 161 struct addrinfo ai; 162 struct sockaddr_storage sa; 163 }; 164 165 struct smtp_auth_mechanisms { 166 int cram_md5; 167 int login; 168 }; 169 170 struct smtp_features { 171 struct smtp_auth_mechanisms auth; 172 int starttls; 173 }; 174 175 /* global variables */ 176 extern struct aliases aliases; 177 extern struct config config; 178 extern struct strlist tmpfs; 179 extern struct authusers authusers; 180 extern char username[USERNAME_SIZE]; 181 extern uid_t useruid; 182 extern const char *logident_base; 183 184 extern char neterr[ERRMSG_SIZE]; 185 extern char errmsg[ERRMSG_SIZE]; 186 187 /* conf.c */ 188 void trim_line(char *); 189 void parse_conf(const char *); 190 void parse_authfile(const char *); 191 192 /* crypto.c */ 193 void hmac_md5(unsigned char *, int, unsigned char *, int, unsigned char *); 194 int smtp_auth_md5(int, char *, char *); 195 int smtp_init_crypto(int, int, struct smtp_features*); 196 197 /* dns.c */ 198 int dns_get_mx_list(const char *, int, struct mx_hostentry **, int); 199 200 /* net.c */ 201 char *ssl_errstr(void); 202 int read_remote(int, int, char *); 203 ssize_t send_remote_command(int, const char*, ...) __attribute__((__nonnull__(2), __format__ (__printf__, 2, 3))); 204 int perform_server_greeting(int, struct smtp_features*); 205 int deliver_remote(struct qitem *); 206 207 /* base64.c */ 208 int base64_encode(const void *, int, char **); 209 int base64_decode(const char *, void *); 210 211 /* dma.c */ 212 #define EXPAND_ADDR 1 213 #define EXPAND_WILDCARD 2 214 int add_recp(struct queue *, const char *, int); 215 void run_queue(struct queue *); 216 217 /* spool.c */ 218 int newspoolf(struct queue *); 219 int linkspool(struct queue *); 220 int load_queue(struct queue *); 221 void delqueue(struct qitem *); 222 int acquirespool(struct qitem *); 223 void dropspool(struct queue *, struct qitem *); 224 int flushqueue_since(unsigned int); 225 int flushqueue_signal(void); 226 227 /* local.c */ 228 int deliver_local(struct qitem *); 229 230 /* mail.c */ 231 void bounce(struct qitem *, const char *) __attribute__((__noreturn__)); 232 int readmail(struct queue *, int, int); 233 234 /* util.c */ 235 const char *hostname(void); 236 const char *systemhostname(void); 237 void setlogident(const char *, ...) __attribute__((__format__ (__printf__, 1, 2))); 238 void errlog(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3))) __attribute__((__noreturn__)); 239 void errlogx(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3))) __attribute__((__noreturn__)); 240 void set_username(void); 241 void deltmp(void); 242 int do_timeout(int, int); 243 int open_locked(const char *, int, ...); 244 char *rfc822date(void); 245 int strprefixcmp(const char *, const char *); 246 void init_random(void); 247 248 #endif 249