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c988f1f4 | 1 | /* $Cambridge: exim/src/src/routers/rf_get_munge_headers.c,v 1.2 2005/01/04 10:00:44 ph10 Exp $ */ |
0756eb3c PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
c988f1f4 | 7 | /* Copyright (c) University of Cambridge 1995 - 2005 */ |
0756eb3c PH |
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 additional headers for a router * | |
16 | *************************************************/ | |
17 | ||
18 | /* This function is called by both routers to sort out the additional headers | |
19 | and header remove list for a particular address. | |
20 | ||
21 | Arguments: | |
22 | addr the input address | |
23 | rblock the router instance | |
24 | extra_headers points to where to hang the header chain | |
25 | remove_headers points to where to hang the remove list | |
26 | ||
27 | Returns: OK if no problem | |
28 | DEFER if expanding a string caused a deferment | |
29 | or a big disaster (e.g. expansion failure) | |
30 | */ | |
31 | ||
32 | int | |
33 | rf_get_munge_headers(address_item *addr, router_instance *rblock, | |
34 | header_line **extra_headers, uschar **remove_headers) | |
35 | { | |
36 | /* Default is to retain existing headers */ | |
37 | ||
38 | *extra_headers = addr->p.extra_headers; | |
39 | ||
40 | if (rblock->extra_headers != NULL) | |
41 | { | |
42 | header_line *h; | |
43 | uschar *s = expand_string(rblock->extra_headers); | |
44 | ||
45 | if (s == NULL) | |
46 | { | |
47 | if (!expand_string_forcedfail) | |
48 | { | |
49 | addr->message = string_sprintf("%s router failed to expand \"%s\": %s", | |
50 | rblock->name, rblock->extra_headers, expand_string_message); | |
51 | return DEFER; | |
52 | } | |
53 | } | |
54 | ||
55 | /* Expand succeeded. Put extra header at the start of the chain because | |
56 | further down it may point to headers from other routers, which may be | |
57 | shared with other addresses. The output function outputs them in reverse | |
58 | order. */ | |
59 | ||
60 | else | |
61 | { | |
62 | int slen = Ustrlen(s); | |
63 | if (slen > 0) | |
64 | { | |
65 | h = store_get(sizeof(header_line)); | |
66 | ||
67 | /* We used to use string_sprintf() to add the newline if needed, but that | |
68 | causes problems if the header line is exceedingly long (e.g. adding | |
69 | something to a pathologically long line). So avoid it. */ | |
70 | ||
71 | if (s[slen-1] == '\n') | |
72 | { | |
73 | h->text = s; | |
74 | } | |
75 | else | |
76 | { | |
77 | h->text = store_get(slen+2); | |
78 | memcpy(h->text, s, slen); | |
79 | h->text[slen++] = '\n'; | |
80 | h->text[slen] = 0; | |
81 | } | |
82 | ||
83 | h->next = addr->p.extra_headers; | |
84 | h->type = htype_other; | |
85 | h->slen = slen; | |
86 | *extra_headers = h; | |
87 | } | |
88 | } | |
89 | } | |
90 | ||
91 | /* Default is to retain existing removes */ | |
92 | ||
93 | *remove_headers = addr->p.remove_headers; | |
94 | ||
95 | if (rblock->remove_headers != NULL) | |
96 | { | |
97 | uschar *s = expand_string(rblock->remove_headers); | |
98 | if (s == NULL) | |
99 | { | |
100 | if (!expand_string_forcedfail) | |
101 | { | |
102 | addr->message = string_sprintf("%s router failed to expand \"%s\": %s", | |
103 | rblock->name, rblock->remove_headers, expand_string_message); | |
104 | return DEFER; | |
105 | } | |
106 | } | |
107 | else if (*s != 0) | |
108 | { | |
109 | if (addr->p.remove_headers == NULL) | |
110 | *remove_headers = s; | |
111 | else | |
112 | *remove_headers = string_sprintf("%s : %s", addr->p.remove_headers, s); | |
113 | } | |
114 | } | |
115 | ||
116 | return OK; | |
117 | } | |
118 | ||
119 | /* End of rf_get_munge_headers.c */ |