2 * Copyright (c) 2008-2014, Simon Schubert <2@0x2c.org>.
3 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
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>.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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
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.
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
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>
49 #define VERSION "DragonFly Mail Agent " DMA_VERSION
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 */
60 #define PATH_MAX 1024 /* Max path len */
62 #define SMTP_PORT 25 /* Default SMTP port */
63 #define CON_TIMEOUT (5*60) /* Connection timeout per RFC5321 */
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 */
75 #error Please define CONF_PATH
79 #error Please define LIBEXEC_PATH
82 #define SPOOL_FLUSHFILE "flush"
85 #define DMA_ROOT_USER "mail"
88 #define DMA_GROUP "mail"
97 SLIST_ENTRY(stritem) next;
100 SLIST_HEAD(strlist, stritem);
103 LIST_ENTRY(alias) next;
105 struct strlist dests;
107 LIST_HEAD(aliases, alias);
110 LIST_ENTRY(qitem) next;
120 LIST_HEAD(queueh, qitem);
131 const char *smarthost;
134 const char *spooldir;
135 const char *authpath;
136 const char *certfile;
138 const char *mailname;
139 const char *masquerade_host;
140 const char *masquerade_user;
141 const unsigned char *fingerprint;
143 /* XXX does not belong into config */
149 SLIST_ENTRY(authuser) next;
154 SLIST_HEAD(authusers, authuser);
157 struct mx_hostentry {
159 char addr[INET6_ADDRSTRLEN];
162 struct sockaddr_storage sa;
165 struct smtp_auth_mechanisms {
170 struct smtp_features {
171 struct smtp_auth_mechanisms auth;
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;
184 extern char neterr[ERRMSG_SIZE];
185 extern char errmsg[ERRMSG_SIZE];
187 /* aliases_parse.y */
194 void trim_line(char *);
195 void parse_conf(const char *);
196 void parse_authfile(const char *);
199 void hmac_md5(unsigned char *, int, unsigned char *, int, unsigned char *);
200 int smtp_auth_md5(int, char *, char *);
201 int smtp_init_crypto(int, int, struct smtp_features*);
204 int dns_get_mx_list(const char *, int, struct mx_hostentry **, int);
207 char *ssl_errstr(void);
208 int read_remote(int, int, char *);
209 ssize_t send_remote_command(int, const char*, ...) __attribute__((__nonnull__(2), __format__ (__printf__, 2, 3)));
210 int perform_server_greeting(int, struct smtp_features*);
211 int deliver_remote(struct qitem *);
214 int base64_encode(const void *, int, char **);
215 int base64_decode(const char *, void *);
218 #define EXPAND_ADDR 1
219 #define EXPAND_WILDCARD 2
220 int add_recp(struct queue *, const char *, int);
221 void run_queue(struct queue *);
224 int newspoolf(struct queue *);
225 int linkspool(struct queue *);
226 int load_queue(struct queue *);
227 void delqueue(struct qitem *);
228 int acquirespool(struct qitem *);
229 void dropspool(struct queue *, struct qitem *);
230 int flushqueue_since(unsigned int);
231 int flushqueue_signal(void);
234 int deliver_local(struct qitem *);
237 void bounce(struct qitem *, const char *);
238 int readmail(struct queue *, int, int);
241 const char *hostname(void);
242 const char *systemhostname(void);
243 void setlogident(const char *, ...) __attribute__((__format__ (__printf__, 1, 2)));
244 void errlog(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3)));
245 void errlogx(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3)));
246 void set_username(void);
248 int do_timeout(int, int);
249 int open_locked(const char *, int, ...);
250 char *rfc822date(void);
251 int strprefixcmp(const char *, const char *);
252 void init_random(void);