Blame SOURCES/httpd-2.4.6-rewrite-clientaddr.patch

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--- a/modules/mappers/mod_rewrite.c	2014/01/28 19:40:17	1562174
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+++ b/modules/mappers/mod_rewrite.c	2014/02/10 18:54:23	1566702
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@@ -2139,7 +2139,10 @@
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             break;
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         case 16:
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-            if (!strcmp(var, "REQUEST_FILENAME")) {
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+            if (*var == 'C' && !strcmp(var, "CONN_REMOTE_ADDR")) {
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+                result = r->connection->client_ip;
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+            }
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+            else if (!strcmp(var, "REQUEST_FILENAME")) {
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                 result = r->filename; /* same as script_filename (15) */
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             }
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             break;