dma.h

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