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
  70 #ifndef CONF_PATH
  71 #error Please define CONF_PATH
  72 #endif
  73
  74 #ifndef LIBEXEC_PATH
  75 #error Please define LIBEXEC_PATH
  76 #endif
  77
  78 #define SPOOL_FLUSHFILE "flush"
  79
  80 #ifndef DMA_ROOT_USER
  81 #define DMA_ROOT_USER   "mail"
  82 #endif
  83 #ifndef DMA_GROUP
  84 #define DMA_GROUP       "mail"
  85 #endif
  86
  87 #ifndef MBOX_STRICT
  88 #define MBOX_STRICT     0
  89 #endif
  90
  91
  92 struct stritem {
  93         SLIST_ENTRY(stritem) next;
  94         char *str;
  95 };
  96 SLIST_HEAD(strlist, stritem);
  97
  98 struct alias {
  99         LIST_ENTRY(alias) next;
 100         char *alias;
 101         struct strlist dests;
 102 };
 103 LIST_HEAD(aliases, alias);
 104
 105 struct qitem {
 106         LIST_ENTRY(qitem) next;
 107         const char *sender;
 108         char *addr;
 109         char *queuefn;
 110         char *mailfn;
 111         char *queueid;
 112         FILE *queuef;
 113         FILE *mailf;
 114         int remote;
 115 };
 116 LIST_HEAD(queueh, qitem);
 117
 118 struct queue {
 119         struct queueh queue;
 120         char *id;
 121         FILE *mailf;
 122         char *tmpf;
 123         const char *sender;
 124 };
 125
 126 struct config {
 127         const char *smarthost;
 128         int port;
 129         const char *aliases;
 130         const char *spooldir;
 131         const char *authpath;
 132         const char *certfile;
 133         int features;
 134         const char *mailname;
 135         const char *masquerade_host;
 136         const char *masquerade_user;
 137
 138         /* XXX does not belong into config */
 139         SSL *ssl;
 140 };
 141
 142
 143 struct authuser {
 144         SLIST_ENTRY(authuser) next;
 145         char *login;
 146         char *password;
 147         char *host;
 148 };
 149 SLIST_HEAD(authusers, authuser);
 150
 151
 152 struct mx_hostentry {
 153         char            host[MAXDNAME];
 154         char            addr[INET6_ADDRSTRLEN];
 155         int             pref;
 156         struct addrinfo ai;
 157         struct sockaddr_storage sa;
 158 };
 159
 160
 161 /* global variables */
 162 extern struct aliases aliases;
 163 extern struct config config;
 164 extern struct strlist tmpfs;
 165 extern struct authusers authusers;
 166 extern char username[USERNAME_SIZE];
 167 extern uid_t useruid;
 168 extern const char *logident_base;
 169
 170 extern char neterr[ERRMSG_SIZE];
 171 extern char errmsg[ERRMSG_SIZE];
 172
 173 /* aliases_parse.y */
 174 int yyparse(void);
 175 extern FILE *yyin;
 176
 177 /* conf.c */
 178 void trim_line(char *);
 179 void parse_conf(const char *);
 180 void parse_authfile(const char *);
 181
 182 /* crypto.c */
 183 void hmac_md5(unsigned char *, int, unsigned char *, int, unsigned char *);
 184 int smtp_auth_md5(int, char *, char *);
 185 int smtp_init_crypto(int, int);
 186
 187 /* dns.c */
 188 int dns_get_mx_list(const char *, int, struct mx_hostentry **, int);
 189
 190 /* net.c */
 191 char *ssl_errstr(void);
 192 int read_remote(int, int, char *);
 193 ssize_t send_remote_command(int, const char*, ...)  __attribute__((__nonnull__(2), __format__ (__printf__, 2, 3)));
 194 int deliver_remote(struct qitem *);
 195
 196 /* base64.c */
 197 int base64_encode(const void *, int, char **);
 198 int base64_decode(const char *, void *);
 199
 200 /* dma.c */
 201 #define EXPAND_ADDR     1
 202 #define EXPAND_WILDCARD 2
 203 int add_recp(struct queue *, const char *, int);
 204 void run_queue(struct queue *);
 205
 206 /* spool.c */
 207 int newspoolf(struct queue *);
 208 int linkspool(struct queue *);
 209 int load_queue(struct queue *);
 210 void delqueue(struct qitem *);
 211 int acquirespool(struct qitem *);
 212 void dropspool(struct queue *, struct qitem *);
 213 int flushqueue_since(unsigned int);
 214 int flushqueue_signal(void);
 215
 216 /* local.c */
 217 int deliver_local(struct qitem *);
 218
 219 /* mail.c */
 220 void bounce(struct qitem *, const char *);
 221 int readmail(struct queue *, int, int);
 222
 223 /* util.c */
 224 const char *hostname(void);
 225 void setlogident(const char *, ...) __attribute__((__format__ (__printf__, 1, 2)));
 226 void errlog(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3)));
 227 void errlogx(int, const char *, ...) __attribute__((__format__ (__printf__, 2, 3)));
 228 void set_username(void);
 229 void deltmp(void);
 230 int do_timeout(int, int);
 231 int open_locked(const char *, int, ...);
 232 char *rfc822date(void);
 233 int strprefixcmp(const char *, const char *);
 234 void init_random(void);
 235
 236 #endif