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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 09:44:07 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 09:44:07 +0000
commit39ce00b8d520cbecbd6af87257e8fb11df0ec273 (patch)
tree4c21a2674c19e5c44be3b3550b476b9e63d8ae3d /src/routers/rf_get_munge_headers.c
parentInitial commit. (diff)
downloadexim4-39ce00b8d520cbecbd6af87257e8fb11df0ec273.tar.xz
exim4-39ce00b8d520cbecbd6af87257e8fb11df0ec273.zip
Adding upstream version 4.94.2.upstream/4.94.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--src/routers/rf_get_munge_headers.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/src/routers/rf_get_munge_headers.c b/src/routers/rf_get_munge_headers.c
new file mode 100644
index 0000000..5c95d2d
--- /dev/null
+++ b/src/routers/rf_get_munge_headers.c
@@ -0,0 +1,122 @@
+/*************************************************
+* Exim - an Internet mail transport agent *
+*************************************************/
+
+/* Copyright (c) University of Cambridge 1995 - 2018 */
+/* See the file NOTICE for conditions of use and distribution. */
+
+#include "../exim.h"
+#include "rf_functions.h"
+
+
+/*************************************************
+* Get additional headers for a router *
+*************************************************/
+
+/* This function is called by routers to sort out the additional headers
+and header remove list for a particular address.
+
+Arguments:
+ addr the input address
+ rblock the router instance
+ extra_headers points to where to hang the header chain
+ remove_headers points to where to hang the remove list
+
+Returns: OK if no problem
+ DEFER if expanding a string caused a deferment
+ or a big disaster (e.g. expansion failure)
+*/
+
+int
+rf_get_munge_headers(address_item *addr, router_instance *rblock,
+ header_line **extra_headers, uschar **remove_headers)
+{
+/* Default is to retain existing headers */
+*extra_headers = addr->prop.extra_headers;
+
+if (rblock->extra_headers)
+ {
+ const uschar * list = rblock->extra_headers;
+ int sep = '\n';
+ uschar * s;
+ int slen;
+
+ while ((s = string_nextinlist(&list, &sep, NULL, 0)))
+ if (!(s = expand_string(s)))
+ {
+ if (!f.expand_string_forcedfail)
+ {
+ addr->message = string_sprintf(
+ "%s router failed to expand add_headers item \"%s\": %s",
+ rblock->name, s, expand_string_message);
+ return DEFER;
+ }
+ }
+ else if ((slen = Ustrlen(s)) > 0)
+ {
+ /* Expand succeeded. Put extra headers at the start of the chain because
+ further down it may point to headers from other routers, which may be
+ shared with other addresses. The output function outputs them in reverse
+ order. */
+
+ header_line * h = store_get(sizeof(header_line), FALSE);
+
+ /* We used to use string_sprintf() to add the newline if needed, but that
+ causes problems if the header line is exceedingly long (e.g. adding
+ something to a pathologically long line). So avoid it. */
+
+ if (s[slen-1] == '\n')
+ h->text = s;
+ else
+ {
+ h->text = store_get(slen+2, is_tainted(s));
+ memcpy(h->text, s, slen);
+ h->text[slen++] = '\n';
+ h->text[slen] = 0;
+ }
+
+ h->next = *extra_headers;
+ h->type = htype_other;
+ h->slen = slen;
+ *extra_headers = h;
+ }
+ }
+
+/* Default is to retain existing removes */
+*remove_headers = addr->prop.remove_headers;
+
+/* Expand items from colon-sep list separately, then build new list */
+if (rblock->remove_headers)
+ {
+ const uschar * list = rblock->remove_headers;
+ int sep = ':';
+ uschar * s;
+ gstring * g = NULL;
+
+ if (*remove_headers)
+ g = string_cat(NULL, *remove_headers);
+
+ while ((s = string_nextinlist(&list, &sep, NULL, 0)))
+ if (!(s = expand_string(s)))
+ {
+ if (!f.expand_string_forcedfail)
+ {
+ addr->message = string_sprintf(
+ "%s router failed to expand remove_headers item \"%s\": %s",
+ rblock->name, s, expand_string_message);
+ return DEFER;
+ }
+ }
+ else if (*s)
+ g = string_append_listele(g, ':', s);
+
+ if (g)
+ *remove_headers = g->s;
+ }
+
+return OK;
+}
+
+/* vi: aw ai sw=2
+*/
+/* End of rf_get_munge_headers.c */