src/routers/accept.c

   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
   9 #include "../exim.h"
  10 #include "rf_functions.h"
  11 #include "accept.h"
  12
  13
  14 /* Options specific to the accept router. Because some compilers do not like
  15 empty declarations ("undefined" in the Standard) we put in a dummy value. */
  16
  17 optionlist accept_router_options[] = {
  18   { "", opt_hidden, NULL }
  19 };
  20
  21 /* Size of the options list. An extern variable has to be used so that its
  22 address can appear in the tables drtables.c. */
  23
  24 int accept_router_options_count =
  25   sizeof(accept_router_options)/sizeof(optionlist);
  26
  27 /* Default private options block for the accept router. Again, a dummy
  28 value is used. */
  29
  30 accept_router_options_block accept_router_option_defaults = {
  31   NULL        /* dummy */
  32 };
  33
  34
  35 #ifdef MACRO_PREDEF
  36
  37 /* Dummy entries */
  38 void accept_router_init(router_instance *rblock) {}
  39 int accept_router_entry(router_instance *rblock, address_item *addr,
  40   struct passwd *pw, int verify, address_item **addr_local,
  41   address_item **addr_remote, address_item **addr_new,
  42   address_item **addr_succeed) {return 0;}
  43
  44 #else   /*!MACRO_PREDEF*/
  45
  46
  47
  48 /*************************************************
  49 *          Initialization entry point            *
  50 *************************************************/
  51
  52 /* Called for each instance, after its options have been read, to enable
  53 consistency checks to be done, or anything else that needs to be set up. */
  54
  55 void accept_router_init(router_instance *rblock)
  56 {
  57 /*
  58 accept_router_options_block *ob =
  59   (accept_router_options_block *)(rblock->options_block);
  60 */
  61
  62 /* By default, log deliveries via this router as local deliveries. We can't
  63 just leave it as TRUE_UNSET, because the global default is FALSE. */
  64
  65 if (rblock->log_as_local == TRUE_UNSET) rblock->log_as_local = TRUE;
  66 }
  67
  68
  69
  70 /*************************************************
  71 *              Main entry point                  *
  72 *************************************************/
  73
  74 /* See local README for interface description. This router returns:
  75
  76 DEFER
  77   . verifying the errors address caused a deferment or a big disaster such
  78       as an expansion failure (rf_get_errors_address)
  79   . expanding a headers_{add,remove} string caused a deferment or another
  80       expansion error (rf_get_munge_headers)
  81   . a problem in rf_get_transport: no transport when one is needed;
  82     failed to expand dynamic transport; failed to find dynamic transport
  83   . failure to expand or find a uid/gid (rf_get_ugid via rf_queue_add)
  84
  85 OK
  86   added address to addr_local or addr_remote, as appropriate for the
  87   type of transport
  88 */
  89
  90 int accept_router_entry(
  91   router_instance *rblock,        /* data for this instantiation */
  92   address_item *addr,             /* address we are working on */
  93   struct passwd *pw,              /* passwd entry after check_local_user */
  94   int verify,                     /* v_none/v_recipient/v_sender/v_expn */
  95   address_item **addr_local,      /* add it to this if it's local */
  96   address_item **addr_remote,     /* add it to this if it's remote */
  97   address_item **addr_new,        /* put new addresses on here */
  98   address_item **addr_succeed)    /* put old address here on success */
  99 {
 100 /*
 101 accept_router_options_block *ob =
 102   (accept_router_options_block *)(rblock->options_block);
 103 */
 104 int rc;
 105 uschar *errors_to;
 106 uschar *remove_headers;
 107 header_line *extra_headers;
 108
 109 addr_new = addr_new;  /* Keep picky compilers happy */
 110 addr_succeed = addr_succeed;
 111
 112 DEBUG(D_route) debug_printf("%s router called for %s\n  domain = %s\n",
 113   rblock->name, addr->address, addr->domain);
 114
 115 /* Set up the errors address, if any. */
 116
 117 rc = rf_get_errors_address(addr, rblock, verify, &errors_to);
 118 if (rc != OK) return rc;
 119
 120 /* Set up the additional and removable headers for the address. */
 121
 122 rc = rf_get_munge_headers(addr, rblock, &extra_headers, &remove_headers);
 123 if (rc != OK) return rc;
 124
 125 /* Set the transport and accept the address; update its errors address and
 126 header munging. Initialization ensures that there is a transport except when
 127 verifying. */
 128
 129 if (!rf_get_transport(rblock->transport_name, &(rblock->transport),
 130   addr, rblock->name, NULL)) return DEFER;
 131
 132 addr->transport = rblock->transport;
 133 addr->prop.errors_address = errors_to;
 134 addr->prop.extra_headers = extra_headers;
 135 addr->prop.remove_headers = remove_headers;
 136
 137 return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)? OK : DEFER;
 138 }
 139
 140 #endif  /*!MACRO_PREDEF*/
 141 /* End of routers/accept.c */