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0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
0a49a7a4 | 5 | /* Copyright (c) University of Cambridge 1995 - 2009 */ |
0756eb3c PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | #include "../exim.h" | |
9 | #include "rf_functions.h" | |
10 | ||
11 | ||
12 | /************************************************* | |
13 | * Get additional headers for a router * | |
14 | *************************************************/ | |
15 | ||
16 | /* This function is called by both routers to sort out the additional headers | |
17 | and header remove list for a particular address. | |
18 | ||
19 | Arguments: | |
20 | addr the input address | |
21 | rblock the router instance | |
22 | extra_headers points to where to hang the header chain | |
23 | remove_headers points to where to hang the remove list | |
24 | ||
25 | Returns: OK if no problem | |
26 | DEFER if expanding a string caused a deferment | |
27 | or a big disaster (e.g. expansion failure) | |
28 | */ | |
29 | ||
30 | int | |
31 | rf_get_munge_headers(address_item *addr, router_instance *rblock, | |
32 | header_line **extra_headers, uschar **remove_headers) | |
33 | { | |
34 | /* Default is to retain existing headers */ | |
35 | ||
36 | *extra_headers = addr->p.extra_headers; | |
37 | ||
38 | if (rblock->extra_headers != NULL) | |
39 | { | |
40 | header_line *h; | |
41 | uschar *s = expand_string(rblock->extra_headers); | |
42 | ||
43 | if (s == NULL) | |
44 | { | |
45 | if (!expand_string_forcedfail) | |
46 | { | |
47 | addr->message = string_sprintf("%s router failed to expand \"%s\": %s", | |
48 | rblock->name, rblock->extra_headers, expand_string_message); | |
49 | return DEFER; | |
50 | } | |
51 | } | |
52 | ||
53 | /* Expand succeeded. Put extra header at the start of the chain because | |
54 | further down it may point to headers from other routers, which may be | |
55 | shared with other addresses. The output function outputs them in reverse | |
56 | order. */ | |
57 | ||
58 | else | |
59 | { | |
60 | int slen = Ustrlen(s); | |
61 | if (slen > 0) | |
62 | { | |
63 | h = store_get(sizeof(header_line)); | |
64 | ||
65 | /* We used to use string_sprintf() to add the newline if needed, but that | |
66 | causes problems if the header line is exceedingly long (e.g. adding | |
67 | something to a pathologically long line). So avoid it. */ | |
68 | ||
69 | if (s[slen-1] == '\n') | |
70 | { | |
71 | h->text = s; | |
72 | } | |
73 | else | |
74 | { | |
75 | h->text = store_get(slen+2); | |
76 | memcpy(h->text, s, slen); | |
77 | h->text[slen++] = '\n'; | |
78 | h->text[slen] = 0; | |
79 | } | |
80 | ||
81 | h->next = addr->p.extra_headers; | |
82 | h->type = htype_other; | |
83 | h->slen = slen; | |
84 | *extra_headers = h; | |
85 | } | |
86 | } | |
87 | } | |
88 | ||
89 | /* Default is to retain existing removes */ | |
90 | ||
91 | *remove_headers = addr->p.remove_headers; | |
92 | ||
93 | if (rblock->remove_headers != NULL) | |
94 | { | |
95 | uschar *s = expand_string(rblock->remove_headers); | |
96 | if (s == NULL) | |
97 | { | |
98 | if (!expand_string_forcedfail) | |
99 | { | |
100 | addr->message = string_sprintf("%s router failed to expand \"%s\": %s", | |
101 | rblock->name, rblock->remove_headers, expand_string_message); | |
102 | return DEFER; | |
103 | } | |
104 | } | |
105 | else if (*s != 0) | |
106 | { | |
107 | if (addr->p.remove_headers == NULL) | |
108 | *remove_headers = s; | |
109 | else | |
110 | *remove_headers = string_sprintf("%s : %s", addr->p.remove_headers, s); | |
111 | } | |
112 | } | |
113 | ||
114 | return OK; | |
115 | } | |
116 | ||
117 | /* End of rf_get_munge_headers.c */ |