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c988f1f4 | 1 | /* $Cambridge: exim/src/src/routers/rf_get_errors_address.c,v 1.3 2005/01/04 10:00:44 ph10 Exp $ */ |
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2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
c988f1f4 | 7 | /* Copyright (c) University of Cambridge 1995 - 2005 */ |
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8 | /* See the file NOTICE for conditions of use and distribution. */ |
9 | ||
10 | #include "../exim.h" | |
11 | #include "rf_functions.h" | |
12 | ||
13 | ||
14 | /************************************************* | |
15 | * Get errors address for a router * | |
16 | *************************************************/ | |
17 | ||
18 | /* This function is called by routers to sort out the errors address for a | |
19 | particular address. If there is a setting in the router block, then expand and | |
20 | verify it, and if it works, use it. Otherwise use any setting that is in the | |
21 | address itself. This might be NULL, meaning unset (the message's sender is then | |
22 | used). Verification isn't done when the original address is just being | |
23 | verified, as otherwise there might be routing loops if someone sets up a silly | |
24 | configuration. | |
25 | ||
26 | Arguments: | |
27 | addr the input address | |
28 | rblock the router instance | |
29 | verify TRUE when verifying | |
30 | errors_to point the errors address here | |
31 | ||
32 | Returns: OK if no problem | |
33 | DEFER if verifying the address caused a deferment | |
34 | or a big disaster (e.g. expansion failure) | |
35 | */ | |
36 | ||
37 | int | |
38 | rf_get_errors_address(address_item *addr, router_instance *rblock, | |
39 | BOOL verify, uschar **errors_to) | |
40 | { | |
41 | uschar *s; | |
42 | ||
43 | *errors_to = addr->p.errors_address; | |
44 | if (rblock->errors_to == NULL) return OK; | |
45 | ||
46 | s = expand_string(rblock->errors_to); | |
47 | ||
48 | if (s == NULL) | |
49 | { | |
50 | if (expand_string_forcedfail) | |
51 | { | |
52 | DEBUG(D_route) | |
53 | debug_printf("forced expansion failure - ignoring errors_to\n"); | |
54 | return OK; | |
55 | } | |
56 | addr->message = string_sprintf("%s router failed to expand \"%s\": %s", | |
57 | rblock->name, rblock->errors_to, expand_string_message); | |
58 | return DEFER; | |
59 | } | |
60 | ||
61 | /* If the errors_to address is empty, it means "ignore errors" */ | |
62 | ||
63 | if (*s == 0) | |
64 | { | |
65 | setflag(addr, af_ignore_error); /* For locally detected errors */ | |
66 | *errors_to = US""; /* Return path for SMTP */ | |
67 | return OK; | |
68 | } | |
69 | ||
70 | /* If we are already verifying, do not check the errors address, in order to | |
71 | save effort (but we do verify when testing an address). When we do verify, set | |
72 | the sender address to null, because that's what it will be when sending an | |
73 | error message, and there are now configuration options that control the running | |
74 | of routers by checking the sender address. When testing an address, there may | |
75 | not be a sender address. We also need to save and restore the expansion values | |
76 | associated with an address. */ | |
77 | ||
78 | if (verify) | |
79 | { | |
80 | *errors_to = s; | |
81 | DEBUG(D_route) | |
82 | debug_printf("skipped verify errors_to address: already verifying\n"); | |
83 | } | |
84 | else | |
85 | { | |
86 | BOOL save_address_test_mode = address_test_mode; | |
87 | int save1 = 0; | |
88 | int i; | |
89 | uschar ***p; | |
90 | uschar *address_expansions_save[ADDRESS_EXPANSIONS_COUNT]; | |
91 | address_item *snew = deliver_make_addr(s, FALSE); | |
92 | ||
93 | if (sender_address != NULL) | |
94 | { | |
95 | save1 = sender_address[0]; | |
96 | sender_address[0] = 0; | |
97 | } | |
98 | ||
99 | for (i = 0, p = address_expansions; *p != NULL;) | |
100 | address_expansions_save[i++] = **p++; | |
101 | address_test_mode = FALSE; | |
102 | ||
103 | DEBUG(D_route|D_verify) | |
104 | debug_printf("------ Verifying errors address %s ------\n", s); | |
4deaf07d | 105 | if (verify_address(snew, NULL, vopt_is_recipient | vopt_qualify, -1, -1, -1, |
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106 | NULL, NULL, NULL) == OK) *errors_to = snew->address; |
107 | DEBUG(D_route|D_verify) | |
108 | debug_printf("------ End verifying errors address %s ------\n", s); | |
109 | ||
110 | address_test_mode = save_address_test_mode; | |
111 | for (i = 0, p = address_expansions; *p != NULL;) | |
112 | **p++ = address_expansions_save[i++]; | |
113 | ||
114 | if (sender_address != NULL) sender_address[0] = save1; | |
115 | } | |
116 | ||
117 | return OK; | |
118 | } | |
119 | ||
120 | /* End of rf_get_errors_address.c */ |