src/src/transports/smtp.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2018 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8 #define DELIVER_BUFFER_SIZE 4096
   9
  10 #define PENDING          256
  11 #define PENDING_DEFER   (PENDING + DEFER)
  12 #define PENDING_OK      (PENDING + OK)
  13
  14
  15 /* Private structure for the private options and other private data. */
  16
  17 typedef struct {
  18   uschar *hosts;
  19   uschar *fallback_hosts;
  20   host_item *hostlist;
  21   host_item *fallback_hostlist;
  22   uschar *authenticated_sender;
  23   uschar *helo_data;
  24   uschar *interface;
  25   uschar *port;
  26   uschar *protocol;
  27   uschar *dscp;
  28   uschar *serialize_hosts;
  29   uschar *hosts_try_auth;
  30   uschar *hosts_require_auth;
  31   uschar *hosts_try_chunking;
  32 #ifdef EXPERIMENTAL_DANE
  33   uschar *hosts_try_dane;
  34   uschar *hosts_require_dane;
  35 #endif
  36   uschar *hosts_try_fastopen;
  37 #ifndef DISABLE_PRDR
  38   uschar *hosts_try_prdr;
  39 #endif
  40 #ifndef DISABLE_OCSP
  41   uschar *hosts_request_ocsp;
  42   uschar *hosts_require_ocsp;
  43 #endif
  44   uschar *hosts_require_tls;
  45   uschar *hosts_avoid_tls;
  46   uschar *hosts_verify_avoid_tls;
  47   uschar *hosts_avoid_pipelining;
  48   uschar *hosts_avoid_esmtp;
  49 #ifdef SUPPORT_TLS
  50   uschar *hosts_nopass_tls;
  51   uschar *hosts_noproxy_tls;
  52 #endif
  53   int     command_timeout;
  54   int     connect_timeout;
  55   int     data_timeout;
  56   int     final_timeout;
  57   int     size_addition;
  58   int     hosts_max_try;
  59   int     hosts_max_try_hardlimit;
  60   BOOL    address_retry_include_sender;
  61   BOOL    allow_localhost;
  62   BOOL    authenticated_sender_force;
  63   BOOL    gethostbyname;
  64   BOOL    dns_qualify_single;
  65   BOOL    dns_search_parents;
  66   dnssec_domains dnssec;
  67   BOOL    delay_after_cutoff;
  68   BOOL    hosts_override;
  69   BOOL    hosts_randomize;
  70   BOOL    keepalive;
  71   BOOL    lmtp_ignore_quota;
  72   uschar *expand_retry_include_ip_address;
  73   BOOL    retry_include_ip_address;
  74 #ifdef SUPPORT_SOCKS
  75   uschar *socks_proxy;
  76 #endif
  77 #ifdef SUPPORT_TLS
  78   uschar *tls_certificate;
  79   uschar *tls_crl;
  80   uschar *tls_privatekey;
  81   uschar *tls_require_ciphers;
  82   uschar *tls_sni;
  83   uschar *tls_verify_certificates;
  84   int     tls_dh_min_bits;
  85   BOOL    tls_tempfail_tryclear;
  86   uschar *tls_verify_hosts;
  87   uschar *tls_try_verify_hosts;
  88   uschar *tls_verify_cert_hostnames;
  89 #endif
  90 #ifndef DISABLE_DKIM
  91   struct ob_dkim dkim;
  92 #endif
  93 } smtp_transport_options_block;
  94
  95 /* smtp connect context */
  96 typedef struct {
  97   uschar *              from_addr;
  98   address_item *        addrlist;
  99   host_item *           host;
 100   int                   host_af;
 101   int                   port;
 102   uschar *              interface;
 103
 104   BOOL verify:1;
 105   BOOL lmtp:1;
 106   BOOL smtps:1;
 107   BOOL ok:1;
 108   BOOL setting_up:1;
 109   BOOL esmtp:1;
 110   BOOL esmtp_sent:1;
 111 #ifndef DISABLE_PRDR
 112   BOOL prdr_active:1;
 113 #endif
 114 #ifdef SUPPORT_I18N
 115   BOOL utf8_needed:1;
 116 #endif
 117   BOOL dsn_all_lasthop:1;
 118 #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
 119   BOOL dane:1;
 120   BOOL dane_required:1;
 121 #endif
 122   BOOL pending_MAIL:1;
 123   BOOL pending_BDAT:1;
 124   BOOL good_RCPT:1;
 125   BOOL completed_addr:1;
 126   BOOL send_rset:1;
 127   BOOL send_quit:1;
 128
 129   int           max_rcpt;
 130   int           cmd_count;
 131
 132   uschar        peer_offered;
 133   uschar        avoid_option;
 134   uschar *      igquotstr;
 135   uschar *      helo_data;
 136 #ifdef EXPERIMENTAL_DSN_INFO
 137   uschar *      smtp_greeting;
 138   uschar *      helo_response;
 139 #endif
 140
 141   address_item *        first_addr;
 142   address_item *        next_addr;
 143   address_item *        sync_addr;
 144
 145   smtp_inblock  inblock;
 146   smtp_outblock outblock;
 147   uschar        buffer[DELIVER_BUFFER_SIZE];
 148   uschar        inbuffer[4096];
 149   uschar        outbuffer[4096];
 150
 151   transport_instance *                  tblock;
 152   smtp_transport_options_block *        ob;
 153 } smtp_context;
 154
 155 extern int smtp_setup_conn(smtp_context *, BOOL);
 156 extern int smtp_write_mail_and_rcpt_cmds(smtp_context *, int *);
 157
 158
 159 /* Data for reading the private options. */
 160
 161 extern optionlist smtp_transport_options[];
 162 extern int smtp_transport_options_count;
 163
 164 /* Block containing default values. */
 165
 166 extern smtp_transport_options_block smtp_transport_option_defaults;
 167
 168 /* The main, init, and closedown entry points for the transport */
 169
 170 extern BOOL smtp_transport_entry(transport_instance *, address_item *);
 171 extern void smtp_transport_init(transport_instance *);
 172 extern void smtp_transport_closedown(transport_instance *);
 173
 174
 175
 176 extern int     smtp_auth(uschar *, unsigned, address_item *, host_item *,
 177                  smtp_transport_options_block *, BOOL,
 178                  smtp_inblock *, smtp_outblock *);
 179 extern BOOL    smtp_mail_auth_str(uschar *, unsigned,
 180                  address_item *, smtp_transport_options_block *);
 181
 182 #ifdef SUPPORT_SOCKS
 183 extern int     socks_sock_connect(host_item *, int, int, uschar *,
 184                  transport_instance *, int);
 185 #endif
 186
 187 /* End of transports/smtp.h */