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 SUPPORT_DANE
  33   uschar *hosts_try_dane;
  34   uschar *hosts_require_dane;
  35   uschar *dane_require_tls_ciphers;
  36 #endif
  37   uschar *hosts_try_fastopen;
  38 #ifndef DISABLE_PRDR
  39   uschar *hosts_try_prdr;
  40 #endif
  41 #ifndef DISABLE_OCSP
  42   uschar *hosts_request_ocsp;
  43   uschar *hosts_require_ocsp;
  44 #endif
  45   uschar *hosts_require_tls;
  46   uschar *hosts_avoid_tls;
  47   uschar *hosts_verify_avoid_tls;
  48   uschar *hosts_avoid_pipelining;
  49 #ifdef EXPERIMENTAL_PIPE_CONNECT
  50   uschar *hosts_pipe_connect;
  51 #endif
  52   uschar *hosts_avoid_esmtp;
  53 #ifdef SUPPORT_TLS
  54   uschar *hosts_nopass_tls;
  55   uschar *hosts_noproxy_tls;
  56 #endif
  57   int     command_timeout;
  58   int     connect_timeout;
  59   int     data_timeout;
  60   int     final_timeout;
  61   int     size_addition;
  62   int     hosts_max_try;
  63   int     hosts_max_try_hardlimit;
  64   BOOL    address_retry_include_sender;
  65   BOOL    allow_localhost;
  66   BOOL    authenticated_sender_force;
  67   BOOL    gethostbyname;
  68   BOOL    dns_qualify_single;
  69   BOOL    dns_search_parents;
  70   dnssec_domains dnssec;
  71   BOOL    delay_after_cutoff;
  72   BOOL    hosts_override;
  73   BOOL    hosts_randomize;
  74   BOOL    keepalive;
  75   BOOL    lmtp_ignore_quota;
  76   uschar *expand_retry_include_ip_address;
  77   BOOL    retry_include_ip_address;
  78 #ifdef SUPPORT_SOCKS
  79   uschar *socks_proxy;
  80 #endif
  81 #ifdef SUPPORT_TLS
  82   uschar *tls_certificate;
  83   uschar *tls_crl;
  84   uschar *tls_privatekey;
  85   uschar *tls_require_ciphers;
  86   uschar *tls_sni;
  87   uschar *tls_verify_certificates;
  88   int     tls_dh_min_bits;
  89   BOOL    tls_tempfail_tryclear;
  90   uschar *tls_verify_hosts;
  91   uschar *tls_try_verify_hosts;
  92   uschar *tls_verify_cert_hostnames;
  93 #endif
  94 #ifdef SUPPORT_I18N
  95   uschar *utf8_downconvert;
  96 #endif
  97 #ifndef DISABLE_DKIM
  98   struct ob_dkim dkim;
  99 #endif
 100 #ifdef EXPERIMENTAL_ARC
 101   uschar *arc_sign;
 102 #endif
 103 } smtp_transport_options_block;
 104
 105 #define SOB (smtp_transport_options_block *)
 106
 107
 108 /* smtp connect context */
 109 typedef struct {
 110   uschar *              from_addr;
 111   address_item *        addrlist;
 112
 113   smtp_connect_args     conn_args;
 114   int                   port;
 115
 116   BOOL verify:1;
 117   BOOL lmtp:1;
 118   BOOL smtps:1;
 119   BOOL ok:1;
 120   BOOL setting_up:1;
 121 #ifdef EXPERIMENTAL_PIPE_CONNECT
 122   BOOL early_pipe_ok:1;
 123   BOOL early_pipe_active:1;
 124 #endif
 125   BOOL esmtp:1;
 126   BOOL esmtp_sent:1;
 127   BOOL pipelining_used:1;
 128 #ifndef DISABLE_PRDR
 129   BOOL prdr_active:1;
 130 #endif
 131 #ifdef SUPPORT_I18N
 132   BOOL utf8_needed:1;
 133 #endif
 134   BOOL dsn_all_lasthop:1;
 135 #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE)
 136   BOOL dane:1;
 137   BOOL dane_required:1;
 138 #endif
 139 #ifdef EXPERIMENTAL_PIPE_CONNECT
 140   BOOL pending_BANNER:1;
 141   BOOL pending_EHLO:1;
 142 #endif
 143   BOOL pending_MAIL:1;
 144   BOOL pending_BDAT:1;
 145   BOOL good_RCPT:1;
 146   BOOL completed_addr:1;
 147   BOOL send_rset:1;
 148   BOOL send_quit:1;
 149
 150   int           max_rcpt;
 151   int           cmd_count;
 152
 153   unsigned      peer_offered;
 154   unsigned      avoid_option;
 155   uschar *      igquotstr;
 156   uschar *      helo_data;
 157 #ifdef EXPERIMENTAL_DSN_INFO
 158   uschar *      smtp_greeting;
 159   uschar *      helo_response;
 160 #endif
 161 #ifdef EXPERIMENTAL_PIPE_CONNECT
 162   ehlo_resp_precis      ehlo_resp;
 163 #endif
 164
 165   address_item *        first_addr;
 166   address_item *        next_addr;
 167   address_item *        sync_addr;
 168
 169   client_conn_ctx       cctx;
 170   smtp_inblock          inblock;
 171   smtp_outblock         outblock;
 172   uschar        buffer[DELIVER_BUFFER_SIZE];
 173   uschar        inbuffer[4096];
 174   uschar        outbuffer[4096];
 175 } smtp_context;
 176
 177 extern int smtp_setup_conn(smtp_context *, BOOL);
 178 extern int smtp_write_mail_and_rcpt_cmds(smtp_context *, int *);
 179 extern int smtp_reap_early_pipe(smtp_context *, int *);
 180
 181
 182 /* Data for reading the private options. */
 183
 184 extern optionlist smtp_transport_options[];
 185 extern int smtp_transport_options_count;
 186
 187 /* Block containing default values. */
 188
 189 extern smtp_transport_options_block smtp_transport_option_defaults;
 190
 191 /* The main, init, and closedown entry points for the transport */
 192
 193 extern BOOL smtp_transport_entry(transport_instance *, address_item *);
 194 extern void smtp_transport_init(transport_instance *);
 195 extern void smtp_transport_closedown(transport_instance *);
 196
 197
 198
 199 extern BOOL    smtp_mail_auth_str(uschar *, unsigned,
 200                  address_item *, smtp_transport_options_block *);
 201
 202 #ifdef SUPPORT_SOCKS
 203 extern int     socks_sock_connect(host_item *, int, int, uschar *,
 204                  transport_instance *, int);
 205 #endif
 206
 207 /* End of transports/smtp.h */