dma.h

   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