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 #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     (5*60)          /* Connection timeout per RFC5321 */
  60
  61 #define STARTTLS        0x002           /* StartTLS support */
  62 #define SECURETRANS     0x004           /* SSL/TLS in general */
  63 #define NOSSL           0x008           /* Do not use SSL */
  64 #define DEFER           0x010           /* Defer mails */
  65 #define INSECURE        0x020           /* Allow plain login w/o encryption */
  66 #define FULLBOUNCE      0x040           /* Bounce the full message */
  67 #define TLS_OPP         0x080           /* Opportunistic STARTTLS */
  68
  69 #ifndef CONF_PATH
  70 #define CONF_PATH       "/etc/dma/dma.conf"     /* Default path to dma.conf */
  71 #endif
  72
  73 #ifndef LIBEXEC_PATH
  74 #error Please define LIBEXEC_PATH
  75 #endif
  76
  77 #define DMA_ROOT_USER   "mail"
  78 #define DMA_GROUP       "mail"
  79
  80
  81 struct stritem {
  82         SLIST_ENTRY(stritem) next;
  83         char *str;
  84 };
  85 SLIST_HEAD(strlist, stritem);
  86
  87 struct alias {
  88         LIST_ENTRY(alias) next;
  89         char *alias;
  90         struct strlist dests;
  91 };
  92 LIST_HEAD(aliases, alias);
  93
  94 struct qitem {
  95         LIST_ENTRY(qitem) next;
  96         const char *sender;
  97         char *addr;
  98         char *queuefn;
  99         char *mailfn;
 100         char *queueid;
 101         FILE *queuef;
 102         FILE *mailf;
 103         int remote;
 104 };
 105 LIST_HEAD(queueh, qitem);
 106
 107 struct queue {
 108         struct queueh queue;
 109         char *id;
 110         FILE *mailf;
 111         char *tmpf;
 112         const char *sender;
 113 };
 114
 115 struct config {
 116         const char *smarthost;
 117         int port;
 118         const char *aliases;
 119         const char *spooldir;
 120         const char *authpath;
 121         const char *certfile;
 122         int features;
 123         const char *mailname;
 124
 125         /* XXX does not belong into config */
 126         SSL *ssl;
 127 };
 128
 129
 130 struct authuser {
 131         SLIST_ENTRY(authuser) next;
 132         char *login;
 133         char *password;
 134         char *host;
 135 };
 136 SLIST_HEAD(authusers, authuser);
 137
 138
 139 struct mx_hostentry {
 140         char            host[MAXDNAME];
 141         char            addr[INET6_ADDRSTRLEN];
 142         int             pref;
 143         struct addrinfo ai;
 144         struct sockaddr_storage sa;
 145 };
 146
 147
 148 /* global variables */
 149 extern struct aliases aliases;
 150 extern struct config config;
 151 extern struct strlist tmpfs;
 152 extern struct authusers authusers;
 153 extern char username[USERNAME_SIZE];
 154 extern uid_t useruid;
 155 extern const char *logident_base;
 156
 157 extern char neterr[ERRMSG_SIZE];
 158 extern char errmsg[ERRMSG_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_authfile(const char *);
 168
 169 /* crypto.c */
 170 void hmac_md5(unsigned char *, int, unsigned char *, int, unsigned char *);
 171 int smtp_auth_md5(int, char *, char *);
 172 int smtp_init_crypto(int, int);
 173
 174 /* dns.c */
 175 int dns_get_mx_list(const char *, int, struct mx_hostentry **, int);
 176
 177 /* net.c */
 178 char *ssl_errstr(void);
 179 int read_remote(int, int, char *);
 180 ssize_t send_remote_command(int, const char*, ...);
 181 int deliver_remote(struct qitem *);
 182
 183 /* base64.c */
 184 int base64_encode(const void *, int, char **);
 185 int base64_decode(const char *, void *);
 186
 187 /* dma.c */
 188 int add_recp(struct queue *, const char *, int);
 189 void run_queue(struct queue *);
 190
 191 /* spool.c */
 192 int newspoolf(struct queue *);
 193 int linkspool(struct queue *);
 194 int load_queue(struct queue *);
 195 void delqueue(struct qitem *);
 196 int acquirespool(struct qitem *);
 197 void dropspool(struct queue *, struct qitem *);
 198
 199 /* local.c */
 200 int deliver_local(struct qitem *);
 201
 202 /* mail.c */
 203 void bounce(struct qitem *, const char *);
 204 int readmail(struct queue *, int, int);
 205
 206 /* util.c */
 207 const char *hostname(void);
 208 void setlogident(const char *, ...);
 209 void errlog(int, const char *, ...);
 210 void errlogx(int, const char *, ...);
 211 void set_username(void);
 212 void deltmp(void);
 213 int do_timeout(int, int);
 214 int open_locked(const char *, int, ...);
 215 char *rfc822date(void);
 216 int strprefixcmp(const char *, const char *);
 217 void init_random(void);
 218
 219 #endif