src/src/routers/accept.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2018 */
   6 /* Copyright (c) The Exim Maintainers 2020 */
   7 /* See the file NOTICE for conditions of use and distribution. */
   8
   9
  10 #include "../exim.h"
  11 #include "rf_functions.h"
  12 #include "accept.h"
  13
  14
  15 /* Options specific to the accept router. Because some compilers do not like
  16 empty declarations ("undefined" in the Standard) we put in a dummy value. */
  17
  18 optionlist accept_router_options[] = {
  19   { "", opt_hidden, {NULL} }
  20 };
  21
  22 /* Size of the options list. An extern variable has to be used so that its
  23 address can appear in the tables drtables.c. */
  24
  25 int accept_router_options_count =
  26   sizeof(accept_router_options)/sizeof(optionlist);
  27
  28 /* Default private options block for the accept router. Again, a dummy
  29 value is used. */
  30
  31 accept_router_options_block accept_router_option_defaults = {
  32   NULL        /* dummy */
  33 };
  34
  35
  36 #ifdef MACRO_PREDEF
  37
  38 /* Dummy entries */
  39 void accept_router_init(router_instance *rblock) {}
  40 int accept_router_entry(router_instance *rblock, address_item *addr,
  41   struct passwd *pw, int verify, address_item **addr_local,
  42   address_item **addr_remote, address_item **addr_new,
  43   address_item **addr_succeed) {return 0;}
  44
  45 #else   /*!MACRO_PREDEF*/
  46
  47
  48
  49 /*************************************************
  50 *          Initialization entry point            *
  51 *************************************************/
  52
  53 /* Called for each instance, after its options have been read, to enable
  54 consistency checks to be done, or anything else that needs to be set up. */
  55
  56 void accept_router_init(router_instance *rblock)
  57 {
  58 /*
  59 accept_router_options_block *ob =
  60   (accept_router_options_block *)(rblock->options_block);
  61 */
  62
  63 /* By default, log deliveries via this router as local deliveries. We can't
  64 just leave it as TRUE_UNSET, because the global default is FALSE. */
  65
  66 if (rblock->log_as_local == TRUE_UNSET) rblock->log_as_local = TRUE;
  67 }
  68
  69
  70
  71 /*************************************************
  72 *              Main entry point                  *
  73 *************************************************/
  74
  75 /* See local README for interface description. This router returns:
  76
  77 DEFER
  78   . verifying the errors address caused a deferment or a big disaster such
  79       as an expansion failure (rf_get_errors_address)
  80   . expanding a headers_{add,remove} string caused a deferment or another
  81       expansion error (rf_get_munge_headers)
  82   . a problem in rf_get_transport: no transport when one is needed;
  83     failed to expand dynamic transport; failed to find dynamic transport
  84   . failure to expand or find a uid/gid (rf_get_ugid via rf_queue_add)
  85
  86 OK
  87   added address to addr_local or addr_remote, as appropriate for the
  88   type of transport
  89 */
  90
  91 int accept_router_entry(
  92   router_instance *rblock,        /* data for this instantiation */
  93   address_item *addr,             /* address we are working on */
  94   struct passwd *pw,              /* passwd entry after check_local_user */
  95   int verify,                     /* v_none/v_recipient/v_sender/v_expn */
  96   address_item **addr_local,      /* add it to this if it's local */
  97   address_item **addr_remote,     /* add it to this if it's remote */
  98   address_item **addr_new,        /* put new addresses on here */
  99   address_item **addr_succeed)    /* put old address here on success */
 100 {
 101 /*
 102 accept_router_options_block *ob =
 103   (accept_router_options_block *)(rblock->options_block);
 104 */
 105 int rc;
 106 uschar *errors_to;
 107 uschar *remove_headers;
 108 header_line *extra_headers;
 109
 110 addr_new = addr_new;  /* Keep picky compilers happy */
 111 addr_succeed = addr_succeed;
 112
 113 DEBUG(D_route) debug_printf("%s router called for %s\n  domain = %s\n",
 114   rblock->name, addr->address, addr->domain);
 115
 116 /* Set up the errors address, if any. */
 117
 118 rc = rf_get_errors_address(addr, rblock, verify, &errors_to);
 119 if (rc != OK) return rc;
 120
 121 /* Set up the additional and removable headers for the address. */
 122
 123 rc = rf_get_munge_headers(addr, rblock, &extra_headers, &remove_headers);
 124 if (rc != OK) return rc;
 125
 126 /* Set the transport and accept the address; update its errors address and
 127 header munging. Initialization ensures that there is a transport except when
 128 verifying. */
 129
 130 if (!rf_get_transport(rblock->transport_name, &(rblock->transport),
 131   addr, rblock->name, NULL)) return DEFER;
 132
 133 addr->transport = rblock->transport;
 134 addr->prop.errors_address = errors_to;
 135 addr->prop.extra_headers = extra_headers;
 136 addr->prop.remove_headers = remove_headers;
 137
 138 return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)? OK : DEFER;
 139 }
 140
 141 #endif  /*!MACRO_PREDEF*/
 142 /* End of routers/accept.c */