diff options
Diffstat (limited to 'src/routers/rf_self_action.c')
| -rw-r--r-- | src/routers/rf_self_action.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/routers/rf_self_action.c b/src/routers/rf_self_action.c new file mode 100644 index 0000000..9a4dc3c --- /dev/null +++ b/src/routers/rf_self_action.c @@ -0,0 +1,123 @@ +/************************************************* +* 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 */ |