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+/*************************************************
+* Exim - an Internet mail transport agent *
+*************************************************/
+
+/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* See the file NOTICE for conditions of use and distribution. */
+
+
+#include "../exim.h"
+#include "rf_functions.h"
+
+
+
+/*************************************************
+* Decode actions for self reference *
+*************************************************/
+
+/* This function is called from a number of routers on receiving
+HOST_FOUND_LOCAL when looking up a supposedly remote host. The action is
+controlled by a generic configuration option called "self" on each router,
+which can be one of:
+
+ . freeze: Log the incident, freeze, and return DEFER
+
+ . defer: Log the incident and return DEFER
+
+ . fail: Fail the address
+
+ . send: Carry on with the delivery regardless -
+ this makes sense only if the SMTP
+ listener on this machine is a differently
+ configured MTA
+
+ . pass: The router passes; the address
+ gets passed to the next router, overriding
+ the setting of no_more
+
+ . reroute:<new-domain> Change the domain to the given domain
+ and return REROUTE so it gets passed back
+ to the routers.
+
+ . reroute:rewrite:<new-domain> The same, but headers containing the
+ old domain get rewritten.
+
+These string values are interpreted earlier on, and passed into this function
+as the values of "code" and "rewrite".
+
+Arguments:
+ addr the address being routed
+ host the host that is local, with MX set (or -1 if MX not used)
+ code the action to be taken (one of the self_xxx enums)
+ rewrite TRUE if rewriting headers required for REROUTED
+ new new domain to be used for REROUTED
+ addr_new child chain for REROUTEED
+
+Returns: DEFER, REROUTED, PASS, FAIL, or OK, according to the value of code.
+*/
+
+int
+rf_self_action(address_item *addr, host_item *host, int code, BOOL rewrite,
+ uschar *new, address_item **addr_new)
+{
+uschar * msg = host->mx >= 0
+ ? US"lowest numbered MX record points to local host"
+ : US"remote host address is the local host";
+
+switch (code)
+ {
+ case self_freeze:
+
+ /* If there is no message id, this is happening during an address
+ verification, so give information about the address that is being verified,
+ and where it has come from. Otherwise, during message delivery, the normal
+ logging for the address will be sufficient. */
+
+ if (message_id[0] == 0)
+ if (sender_fullhost)
+ log_write(0, LOG_MAIN, "%s: %s (while verifying <%s> from host %s)",
+ msg, addr->domain, addr->address, sender_fullhost);
+ else
+ log_write(0, LOG_MAIN, "%s: %s (while routing <%s>)", msg,
+ addr->domain, addr->address);
+ else
+ log_write(0, LOG_MAIN, "%s: %s", msg, addr->domain);
+
+ addr->message = msg;
+ addr->special_action = SPECIAL_FREEZE;
+ return DEFER;
+
+ case self_defer:
+ addr->message = msg;
+ return DEFER;
+
+ case self_reroute:
+ DEBUG(D_route)
+ debug_printf("%s: %s: domain changed to %s\n", msg, addr->domain, new);
+ rf_change_domain(addr, new, rewrite, addr_new);
+ return REROUTED;
+
+ case self_send:
+ DEBUG(D_route)
+ debug_printf("%s: %s: configured to try delivery anyway\n", msg, addr->domain);
+ return OK;
+
+ case self_pass: /* This is soft failure; pass to next router */
+ DEBUG(D_route)
+ debug_printf("%s: %s: passed to next router (self = pass)\n", msg, addr->domain);
+ addr->message = msg;
+ addr->self_hostname = string_copy(host->name);
+ return PASS;
+
+ case self_fail:
+ DEBUG(D_route)
+ debug_printf("%s: %s: address failed (self = fail)\n", msg, addr->domain);
+ addr->message = msg;
+ setflag(addr, af_pass_message);
+ return FAIL;
+ }
+
+return DEFER; /* paranoia */
+}
+
+/* End of rf_self_action.c */