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" 48 49 #define BUF_SIZE 2048 50 #define MIN_RETRY 300 /* 5 minutes */ 51 #define MIN_RETRY_LOCAL 30 /* 30 seconds */ 52 #define MAX_RETRY (3*60*60) /* retry at least every 3 hours */ 53 #define RETRY_JITTER 10 54 #define MAX_TIMEOUT (5*24*60*60) /* give up after 5 days */ 55 #ifndef PATH_MAX 56 #define PATH_MAX 1024 /* Max path len */ 57 #endif 58 #define SMTP_PORT 25 /* Default SMTP port */ 59 #define CON_TIMEOUT 120 /* Connection timeout */ 60 61 #define VIRTUAL 0x001 /* Support for address rewrites */ 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 69 #ifndef CONF_PATH 70 #define CONF_PATH "/etc/dma/dma.conf" /* Default path to dma.conf */ 71 #endif 72 73 struct stritem { 74 SLIST_ENTRY(stritem) next; 75 char *str; 76 }; 77 SLIST_HEAD(strlist, stritem); 78 79 struct alias { 80 LIST_ENTRY(alias) next; 81 char *alias; 82 struct strlist dests; 83 }; 84 LIST_HEAD(aliases, alias); 85 86 struct qitem { 87 LIST_ENTRY(qitem) next; 88 const char *sender; 89 char *addr; 90 char *queuefn; 91 char *mailfn; 92 char *queueid; 93 FILE *queuef; 94 FILE *mailf; 95 int remote; 96 }; 97 LIST_HEAD(queueh, qitem); 98 99 struct queue { 100 struct queueh queue; 101 char *id; 102 FILE *mailf; 103 char *tmpf; 104 const char *sender; 105 }; 106 107 struct config { 108 const char *smarthost; 109 int port; 110 const char *aliases; 111 const char *spooldir; 112 const char *virtualpath; 113 const char *authpath; 114 const char *certfile; 115 int features; 116 const char *mailname; 117 const char *mailnamefile; 118 119 /* XXX does not belong into config */ 120 SSL *ssl; 121 }; 122 123 124 struct virtuser { 125 SLIST_ENTRY(virtuser) next; 126 char *login; 127 char *address; 128 }; 129 SLIST_HEAD(virtusers, virtuser); 130 131 struct authuser { 132 SLIST_ENTRY(authuser) next; 133 char *login; 134 char *password; 135 char *host; 136 }; 137 SLIST_HEAD(authusers, authuser); 138 139 140 struct mx_hostentry { 141 char host[MAXDNAME]; 142 char addr[INET6_ADDRSTRLEN]; 143 int pref; 144 struct addrinfo ai; 145 struct sockaddr_storage sa; 146 }; 147 148 149 /* global variables */ 150 extern struct aliases aliases; 151 extern struct config config; 152 extern struct strlist tmpfs; 153 extern struct virtusers virtusers; 154 extern struct authusers authusers; 155 extern const char *username; 156 extern const char *logident_base; 157 158 extern char neterr[BUF_SIZE]; 159 160 /* aliases_parse.y */ 161 int yyparse(void); 162 extern FILE *yyin; 163 164 /* conf.c */ 165 void trim_line(char *); 166 void parse_conf(const char *); 167 void parse_virtuser(const char *); 168 void parse_authfile(const char *); 169 170 /* crypto.c */ 171 void hmac_md5(unsigned char *, int, unsigned char *, int, caddr_t); 172 int smtp_auth_md5(int, char *, char *); 173 int smtp_init_crypto(int, int); 174 175 /* dns.c */ 176 int dns_get_mx_list(const char *, int, struct mx_hostentry **, int); 177 178 /* net.c */ 179 char *ssl_errstr(void); 180 int read_remote(int, int, char *); 181 ssize_t send_remote_command(int, const char*, ...); 182 int deliver_remote(struct qitem *, const char **); 183 184 /* base64.c */ 185 int base64_encode(const void *, int, char **); 186 int base64_decode(const char *, void *); 187 188 /* dma.c */ 189 int add_recp(struct queue *, const char *, int); 190 void run_queue(struct queue *); 191 192 /* spool.c */ 193 int newspoolf(struct queue *); 194 int linkspool(struct queue *); 195 int load_queue(struct queue *); 196 void delqueue(struct qitem *); 197 int acquirespool(struct qitem *); 198 void dropspool(struct queue *, struct qitem *); 199 200 /* local.c */ 201 int deliver_local(struct qitem *, const char **errmsg); 202 203 /* mail.c */ 204 void bounce(struct qitem *, const char *); 205 int readmail(struct queue *, int, int); 206 207 /* util.c */ 208 const char *hostname(void); 209 void setlogident(const char *, ...); 210 void errlog(int, const char *, ...); 211 void errlogx(int, const char *, ...); 212 void set_username(void); 213 void deltmp(void); 214 int open_locked(const char *, int, ...); 215 char *rfc822date(void); 216 int strprefixcmp(const char *, const char *); 217 218 #endif 219