src/src/routers/ipliteral.c

   1 /* $Cambridge: exim/src/src/routers/ipliteral.c,v 1.3 2005/01/04 10:00:44 ph10 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2005 */
   8 /* See the file NOTICE for conditions of use and distribution. */
   9
  10
  11 #include "../exim.h"
  12 #include "rf_functions.h"
  13 #include "ipliteral.h"
  14
  15
  16 /* Options specific to the ipliteral router. Because some compilers do not like
  17 empty declarations ("undefined" in the Standard) we put in a dummy value. */
  18
  19 optionlist ipliteral_router_options[] = {
  20   { "", opt_hidden, NULL }
  21 };
  22
  23 /* Size of the options list. An extern variable has to be used so that its
  24 address can appear in the tables drtables.c. */
  25
  26 int ipliteral_router_options_count =
  27   sizeof(ipliteral_router_options)/sizeof(optionlist);
  28
  29 /* Default private options block for the ipliteral router. Again, a dummy
  30 value is present to keep some compilers happy. */
  31
  32 ipliteral_router_options_block ipliteral_router_option_defaults = { 0 };
  33
  34
  35
  36 /*************************************************
  37 *          Initialization entry point            *
  38 *************************************************/
  39
  40 /* Called for each instance, after its options have been read, to enable
  41 consistency checks to be done, or anything else that needs to be set up. */
  42
  43 void
  44 ipliteral_router_init(router_instance *rblock)
  45 {
  46 /*
  47 ipliteral_router_options_block *ob =
  48   (ipliteral_router_options_block *)(rblock->options_block);
  49 */
  50 rblock = rblock;
  51 }
  52
  53
  54
  55 /*************************************************
  56 *              Main entry point                  *
  57 *************************************************/
  58
  59 /* See local README for interface details. This router returns:
  60
  61 DECLINE
  62   . the domain is not in the form of an IP literal
  63
  64 DEFER
  65   . verifying the errors address caused a deferment or a big disaster such
  66       as an expansion failure (rf_get_errors_address)
  67   . expanding a headers_{add,remove} string caused a deferment or another
  68       expansion error (rf_get_munge_headers)
  69   . a problem in rf_get_transport: no transport when one is needed;
  70       failed to expand dynamic transport; failed to find dynamic transport
  71   . failure to expand or find a uid/gid (rf_get_ugid via rf_queue_add)
  72   . self = "freeze", self = "defer"
  73
  74 PASS
  75   . self = "pass"
  76
  77 REROUTED
  78   . self = "reroute"
  79
  80 FAIL
  81   . self = "fail"
  82
  83 OK
  84   added address to addr_local or addr_remote, as appropriate for the
  85   type of transport; this includes the self="send" case.
  86 */
  87
  88 int
  89 ipliteral_router_entry(
  90   router_instance *rblock,        /* data for this instantiation */
  91   address_item *addr,             /* address we are working on */
  92   struct passwd *pw,              /* passwd entry after check_local_user */
  93   BOOL verify,                    /* TRUE when verifying */
  94   address_item **addr_local,      /* add it to this if it's local */
  95   address_item **addr_remote,     /* add it to this if it's remote */
  96   address_item **addr_new,        /* put new addresses on here */
  97   address_item **addr_succeed)    /* put old address here on success */
  98 {
  99 /*
 100 ipliteral_router_options_block *ob =
 101   (ipliteral_router_options_block *)(rblock->options_block);
 102 */
 103 host_item *h;
 104 uschar *domain = addr->domain;
 105 int len = Ustrlen(domain);
 106 int rc;
 107
 108 addr_new = addr_new;         /* Keep picky compilers happy */
 109 addr_succeed = addr_succeed;
 110
 111 DEBUG(D_route) debug_printf("%s router called for %s: domain = %s\n",
 112   rblock->name, addr->address, addr->domain);
 113
 114 /* Check that the domain is an IP address enclosed in square brackets. If
 115 not, the router declines. Otherwise route to the single IP address, setting the
 116 host name to "(unnamed)". */
 117
 118 if (domain[0] != '[' || domain[len-1] != ']') return DECLINE;
 119 domain[len-1] = 0;  /* temporarily */
 120
 121 if (!string_is_ip_address(domain+1, NULL))
 122   {
 123   domain[len-1] = ']';
 124   return DECLINE;
 125   }
 126
 127 /* It seems unlikely that ignore_target_hosts will be used with this router,
 128 but if it is set, it should probably work. */
 129
 130 if (verify_check_this_host(&(rblock->ignore_target_hosts), NULL, domain,
 131       domain + 1, NULL) == OK)
 132   {
 133   DEBUG(D_route)
 134       debug_printf("%s is in ignore_target_hosts\n", domain+1);
 135   addr->message = US"IP literal host explicitly ignored";
 136   domain[len-1] = ']';
 137   return DECLINE;
 138   }
 139
 140 /* Set up a host item */
 141
 142 h = store_get(sizeof(host_item));
 143
 144 h->next = NULL;
 145 h->address = string_copy(domain+1);
 146 h->port = PORT_NONE;
 147 domain[len-1] = ']';   /* restore */
 148 h->name = string_copy(domain);
 149 h->mx = MX_NONE;
 150 h->status = hstatus_unknown;
 151 h->why = hwhy_unknown;
 152 h->last_try = 0;
 153
 154 /* Determine whether the host is the local host, and if so, take action
 155 according to the configuration. */
 156
 157 if (host_scan_for_local_hosts(h, &h, NULL) == HOST_FOUND_LOCAL)
 158   {
 159   int rc = rf_self_action(addr, h, rblock->self_code, rblock->self_rewrite,
 160     rblock->self, addr_new);
 161   if (rc != OK) return rc;
 162   }
 163
 164 /* Address is routed to this host */
 165
 166 addr->host_list = h;
 167
 168 /* Set up the errors address, if any. */
 169
 170 rc = rf_get_errors_address(addr, rblock, verify, &(addr->p.errors_address));
 171 if (rc != OK) return rc;
 172
 173 /* Set up the additional and removeable headers for this address. */
 174
 175 rc = rf_get_munge_headers(addr, rblock, &(addr->p.extra_headers),
 176   &(addr->p.remove_headers));
 177 if (rc != OK) return rc;
 178
 179 /* Fill in the transport, queue the address for local or remote delivery, and
 180 yield success. For local delivery, of course, the IP address won't be used. If
 181 just verifying, there need not be a transport, in which case it doesn't matter
 182 which queue we put the address on. This is all now handled by the route_queue()
 183 function. */
 184
 185 if (!rf_get_transport(rblock->transport_name, &(rblock->transport),
 186       addr, rblock->name, NULL))
 187   return DEFER;
 188
 189 addr->transport = rblock->transport;
 190
 191 return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)?
 192   OK : DEFER;
 193 }
 194
 195 /* End of routers/ipliteral.c */